WO2016037359A1

WO2016037359A1 - Data transmission method and data transmission apparatus

Info

Publication number: WO2016037359A1
Application number: PCT/CN2014/086419
Authority: WO
Inventors: 禄彼得; 杨讯
Original assignee: 华为技术有限公司
Priority date: 2014-09-12
Filing date: 2014-09-12
Publication date: 2016-03-17

Abstract

Embodiments of the present invention provide a data transmission method and apparatus. The method comprises: an access point (AP) sends a scheduling frame to multiple stations (STAs), the scheduling frame comprising an identifier of a STA participating in uplink data transmission and priority information used for identifying a main STA and an auxiliary STA; the AP receives uplink data sent by the main STA and the auxiliary STA, a transmission mode of the uplink data comprising any one or a random combination of the following: a multi-user multiple-input multiple-output (MU-MIMO) or an orthogonal frequency division multiple access (OFDMA) mode; and after receiving the uplink data, the AP returns an acknowledgement message to the main STA and the auxiliary STA. By using the method and the apparatus in the embodiments of the present invention, the data transmission efficiency can be improved.

Description

Data transmission method and data transmission device

Technical field

The present invention belongs to the field of communications technologies, and in particular, to a data transmission method and a data transmission device.

Background technique

Orthogonal Frequency Division Multiplexing (OFDM) is the basic transmission method of current wireless communication. It is widely used in Long Term Evolution (LTE) and wireless LAN (English: Wireless). Local Area Network (abbreviation: WLAN) and other wireless communication systems.

Further, since OFDM has the above characteristics, if OFDM non-interfering subcarriers are allocated to multiple users, OFDM can be used to implement multi-user access or data transmission, which is orthogonal frequency division multiple access. : Orthogonal Frequency Division Multiple Access (OFDMA). The OFDMA mode transmits data, that is, the transmitting end sends data of multiple receiving ends to the receiving end associated with the subcarrier/subchannel through respective corresponding subcarriers/subchannels, and OFDMA can flexibly and conveniently schedule multiple users to simultaneously transmit. , is conducive to achieve multi-user diversity.

On the other hand, multi-user multiple input multiple output (English: Multi User-Multiple Input Multiple Output, MU-MIMO for short) is another technology that uses spatial resources to support parallel transmission of multi-user data. The number of users or throughput supported by MU-MIMO is limited by the number of antennas. Compared to OFDMA, MU-MIMO spatial resources have a strong dependence on the channel. If the channel conditions are not met, the number of users or the total number of streams that MU-MIMO can support will decrease accordingly. However, the uplink data transmission in the prior art is not efficient.

Summary of the invention

The embodiment of the invention provides a data transmission method, an access point device and a station of a wireless local area network, which are used for accurately controlling the length of data transmitted by the STA and improving the efficiency of uplink data transmission.

In a first aspect, an embodiment of the present invention provides a data transmission method for a wireless local area network WLAN, where the method includes:

The access point AP sends the scheduling frame to the multiple STAs, where the scheduling frame includes the identifier of the STA participating in the uplink data transmission and the priority information used to distinguish the primary STA from the secondary STA.

The AP receives the uplink data sent by the primary STA and the secondary STA, and the uplink data transmission manner includes any one or any combination of the following: multi-user multiple input multiple output MU-MIMO mode or orthogonal frequency division multiple access OFDMA mode;

After receiving the uplink data, the AP replies with an acknowledgement message to the primary STA and the secondary STA.

With reference to the first aspect, in the first implementation manner of the first aspect, the receiving, by the AP, the uplink data sent by the primary STA and the secondary STA includes:

The AP receives the traditional preamble field in the uplink data sent by the primary STA, and the traditional preamble field carries the channel occupation time information of the uplink data transmission.

After receiving the high-efficiency signaling field in the uplink data sent by the primary STA in the single-user receiving mode, the AP receives the efficient preamble field and the data field in the uplink data sent by the primary STA and the secondary STA in the multi-user receiving mode.

With reference to the first aspect and the foregoing implementation manner, in a second implementation manner of the first aspect, before the access point AP sends the scheduling frame to the multiple site STAs, the method further includes:

The AP selects an STA that satisfies the uplink multi-user data transmission condition, and the uplink multi-user data transmission condition includes any one or any combination of the following: an angle of arrival of a signal from the STA or a received power from the STA.

With reference to the first aspect and the foregoing implementation manner, in a third implementation manner of the first aspect, the manner in which the AP replies to the acknowledgement message includes a downlink MU-MIMO mode and a downlink OFDMA side. Or a dedicated broadcast frame method.

In a second aspect, an embodiment of the present invention provides a data transmission method for a wireless local area network WLAN, where the method includes:

The STA receives the scheduling frame sent by the access point AP, and the scheduling frame includes the identifier of the STA participating in the uplink data transmission and the priority information used to distinguish the primary STA from the secondary STA.

The STA determines, according to the received scheduling frame, that the STA is the primary STA or the secondary STA.

The primary STA or the secondary STA sends uplink data to the AP, and the uplink data transmission manner includes any one or any combination of the following: a multi-user multiple input multiple output MU-MIMO method or an orthogonal frequency division multiple access OFDMA system.

With reference to the second aspect, in a first implementation manner of the second aspect, the determining, by the STA, that the STA is the primary STA or the secondary STA, according to the received scheduling frame, specifically includes:

After determining the participation in the uplink data transmission according to the identifier of the STA participating in the uplink data transmission in the scheduling frame, the STA determines the primary STA or the secondary STA according to the priority information in the scheduling frame.

With the first implementation of the second aspect, in the second implementation manner of the second aspect, the sending, by the primary STA, the uplink data to the AP includes:

After receiving the fixed duration of the scheduling frame, the primary STA sends uplink data carrying the traditional preamble field and the high efficiency signaling field to the AP.

With reference to the second implementation manner of the second aspect, in a third implementation manner of the second aspect, the traditional preamble field or the high-efficiency signaling field carries channel occupation time information of the uplink data transmission.

With reference to the first implementation manner of the second aspect, in a fourth implementation manner of the second aspect, the sending, by the secondary STA, the uplink data to the AP includes:

After receiving the fixed duration of the scheduling frame, the secondary STA determines its own transmission data length by listening to the traditional preamble field or the efficient signaling field sent by the primary STA.

With reference to the fourth implementation manner of the second aspect, in a fifth implementation manner of the second aspect, the determining, by the secondary STA, the length of the sending data by using the traditional preamble field or the high-efficiency signaling field sent by the primary STA, specifically includes:

The secondary STA listens to a traditional preamble field or an efficient signaling field sent by the primary STA;

The secondary STA obtains the data length of the primary STA to be sent according to the traditional preamble field or the high-efficiency signaling field.

The secondary STA determines its own transmission data length according to the data length of the primary STA to be transmitted.

With reference to the second aspect and the foregoing implementation manner, in the sixth implementation manner of the second aspect, the efficient preamble field in the uplink data sent by the secondary STA is aligned with the efficient preamble field in the uplink data sent by the primary STA, or the secondary STA The data field in the sent uplink data is aligned with the data field in the uplink data sent by the primary STA.

In a third aspect, an embodiment of the present invention provides a data transmission apparatus for a wireless local area network (WLAN), and the apparatus includes:

a processing unit, configured to generate a scheduling frame, where the scheduling frame includes an identifier of the STA participating in the uplink data transmission, and priority information used to distinguish the primary STA from the secondary STA;

The transceiver unit is configured to send a scheduling frame, and receive uplink data sent by the primary STA and the secondary STA, and the uplink data transmission manner includes any one or any combination of the following: multi-user multiple input multiple output MU-MIMO mode or orthogonal frequency division multiple Address OFDMA mode.

With reference to the third aspect, in the first implementation manner of the third aspect, the receiving, by the transceiver unit, the uplink data sent by the primary STA and the secondary STA specifically includes:

The transceiver unit receives the traditional preamble field in the uplink data sent by the primary STA by using the single-user receiving mode, where the traditional preamble field carries the channel occupation time information of the uplink data transmission;

After receiving the high-efficiency signaling field in the uplink data sent by the primary STA, the transceiver unit receives the efficient preamble field and the data field in the uplink data sent by the primary STA and the secondary STA in the multi-user receiving mode.

With reference to the third aspect and the foregoing implementation manner, in a second implementation manner of the third aspect, the device further includes a selecting unit,

a selecting unit, configured to select an STA that satisfies an uplink multi-user data transmission condition before the transceiver unit sends the scheduling frame to the multiple station STAs, where the uplink multi-user data transmission conditions include the following: Any or any combination: the angle of arrival of the signal from the STA or the received power from the STA.

With the third aspect and the foregoing implementation manner, in a third implementation manner of the third aspect, after the transceiver unit receives the uplink data, the transceiver unit sends an acknowledgement message to the primary STA and the secondary STA, and the manner of replying the acknowledgement message includes the downlink MU- MIMO mode, downlink OFDMA mode or dedicated broadcast frame mode.

In a fourth aspect, an embodiment of the present invention provides a data transmission apparatus for a wireless local area network (WLAN), and the apparatus includes:

a transceiver unit, configured to receive a scheduling frame sent by the access point AP, and send uplink data to the AP, where the scheduling frame includes an identifier of the STA participating in the uplink data transmission, and priority information used to distinguish the primary STA and the secondary STA, and the uplink The data transmission mode includes any one or any combination of the following: a multi-user multiple input multiple output MU-MIMO mode or an orthogonal frequency division multiple access OFDMA mode;

The processing unit is configured to determine, according to the received scheduling frame, that it is a primary STA or a secondary STA.

With reference to the fourth aspect, in a first implementation manner of the fourth aspect, the processing unit, according to the received scheduling frame, determining that the primary STA or the secondary STA specifically includes:

After determining, according to the identifier of the STA participating in the uplink data transmission in the scheduling frame, the processing unit determines to participate in the uplink data transmission, and determines the primary STA or the secondary STA according to the priority information in the scheduling frame.

With reference to the first implementation manner of the fourth aspect, in the second implementation manner of the fourth aspect, the sending, by the primary STA, the uplink data to the AP includes:

After receiving the fixed duration of the scheduling frame, the transceiver unit sends the uplink data carrying the traditional preamble field and the high efficiency signaling field to the AP.

With reference to the second implementation manner of the fourth aspect, in a third implementation manner of the fourth aspect, the traditional preamble field or the high-efficiency signaling field carries channel occupation time information of the uplink data transmission.

With reference to the first implementation manner of the fourth aspect, in a fourth implementation manner of the fourth aspect, the sending, by the secondary STA, the uplink data to the AP includes:

After the transceiver unit receives the fixed duration of the scheduling frame, the secondary STA listens to the primary STA. The transmitted legacy preamble field or the efficient signaling field determines its own transmitted data length.

With reference to the fourth implementation manner of the fourth aspect, in a fifth implementation manner of the fourth aspect, the determining, by the secondary STA, the length of the sending data by using the traditional preamble field or the high-efficiency signaling field sent by the primary STA, specifically includes:

The transceiver unit listens to a traditional preamble field or an efficient signaling field sent by the primary STA;

The processing unit acquires the data length of the primary STA to be sent according to the traditional preamble field or the high-efficiency signaling field;

The processing unit determines its own transmission data length according to the data length of the primary STA to be transmitted.

With reference to the fourth aspect and the foregoing implementation manner, in a sixth implementation manner of the fourth aspect, the device further includes an adjusting unit,

The adjusting unit is configured to adjust the high-efficiency preamble field in the uplink data sent by the secondary STA to be aligned with the high-efficiency preamble field in the uplink data sent by the primary STA, or the data field in the uplink data sent by the secondary STA and the uplink data sent by the primary STA. Data field alignment.

In the data transmission process of the WLAN, the length of the transmission data of different STAs is aligned, which overcomes the uncertainty of the data length indicated by the AP, thereby improving the uplink data transmission efficiency.

DRAWINGS

1 is an application scenario diagram of a data transmission method in a wireless local area network according to an embodiment of the present invention;

2 is a flow chart of a method according to an embodiment of the present invention;

2a is a sub-graph of a method flow according to an embodiment of the present invention;

3 is a flow chart of a method according to another embodiment of the present invention;

FIG. 3a is a structural diagram of a conventional preamble frame according to another embodiment of the present invention; FIG.

4 is a flow chart of a method according to another embodiment of the present invention;

FIG. 5 is a detailed signaling interaction diagram of another embodiment of the present invention; FIG.

FIG. 6 is a schematic block diagram of a data transmission apparatus according to another embodiment of the present invention; FIG.

FIG. 7 is a schematic block diagram of a data transmission apparatus according to another embodiment of the present invention; FIG.

FIG. 8 is a schematic block diagram of an access point according to another embodiment of the present invention; FIG.

Figure 9 is a schematic block diagram of a station in accordance with another embodiment of the present invention.

detailed description

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the embodiments of the present invention are further described in detail below. In order to fully understand the invention, numerous specific details are recited in the following detailed description. It is apparent that the embodiments described below are part of the embodiments of the invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

An access point (abbreviation: AP, English: Access Point), also known as a wireless access point or hotspot. The AP is an access point for mobile computer users to enter the wired network. It is mainly deployed in the home, inside the building, and inside the campus. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also be deployed outdoors. An AP is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect the wireless network clients together and then connect the wireless network to the Ethernet. At present, the standard adopted by AP is IEEE (English: Institute of Electrical and Electronics Engineers) 802.11 series. Specifically, the AP may be a terminal device or a network device with a WiFi chip. Optionally, the AP may be a device that supports the 802.11ax system. Further, the AP may be configured to support multiple WLANs such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a (English: Wireless Local Area Network, Chinese: Wireless LAN) Standard equipment.

The station (abbreviation: STA, English: Station) can be a wireless communication chip, a wireless sensor or a wireless communication terminal. For example: mobile phone with WiFi (English: Wireless Fidelity) communication function, tablet with WiFi communication function, support A set-top box with WiFi communication function and a computer that supports WiFi communication. Optionally, the site can support the 802.11ax system. Further optionally, the site supports multiple WLAN formats such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

In the prior art, a WLAN adopts a data transmission method in units of frames, and data transmission is implemented by sequentially transmitting frames. Moreover, the WLAN adopts a carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol, and the station (English: Station, abbreviated as STA) confirms the channel when transmitting the frame. The time is free. Because of this sequence of frame transmission, STAs and APs (English: Access Point, AP for short) cannot know each other's real-time information, such as the length of the buffer Buffer or the modulation and coding strategy to be used (English: Modulation Coding Set) , referred to as: MCS). Therefore, the AP may not accurately estimate the channel time that the STA will occupy when participating in the uplink MU-MIMO transmission, and the AP cannot accurately estimate the data length sent by the STA, thereby affecting the uplink data transmission efficiency. In response to this problem, the following embodiments have been proposed.

The embodiment of the present invention can be applied to a wireless local area network, and the wireless local area network can be a basic service set including an access point (abbreviation: BSS, English: Basic Service Set). It should be understood that, under the basic network structure of the WiFi system, a plurality of basic service sets may be included in the network, and each basic service set may include one AP and multiple STAs associated with the AP.

Figure 1 is a system diagram of a typical WLAN deployment scenario, including an AP and three STAs, and the AP communicates with STA1, STA2, and STA3, respectively. In this system, STAs can be classified into primary STAs or secondary STAs by APs. The primary STA sends a message to the AP, so that the AP obtains the uplink data length of the primary STA, and the secondary STA obtains the uplink data length of the primary STA by listening to the message of the primary STA, and sends the uplink data sent by itself and the uplink data sent by the primary STA. Align. It should be noted that the number of secondary STAs may be one or more.

An embodiment of the present invention provides a data transmission method for a wireless local area network WLAN. The data transmission method is applied to an access point AP. 2 is an exemplary block diagram of the data transmission method, and the specific steps are as follows:

Step 201: The access point AP sends a scheduling frame to a plurality of station STAs, where the scheduling frame includes an identifier of the STA participating in the uplink data transmission and priority information used to distinguish the primary STA from the secondary STA.

Optionally, before the access point AP sends the scheduling frame to the associated multiple station STAs, the AP selects an STA that meets the uplink multi-user data transmission condition. Further, the uplink multi-user data transmission condition includes any one or any combination of the following: a signal arrival angle from the STA or a received power from the STA. Specifically, the AP obtains a distribution angle between the STA and the AP according to the signal arrival angle from the STA, and the AP obtains the distance between the STA and the AP according to the received power from the STA.

Specifically, the AP may select an STA whose signal arrival angle is close to participate in uplink multi-user data transmission. For example, the AP is used as an origin to establish a coordinate system. If the signal arrival angle between the two STAs is less than 5°, the two STAs may participate. Uplink multi-user data transmission.

Specifically, the AP may also select the STAs with similar receiving power to participate in the uplink multi-user data transmission, for example, the receiving power of the STA1 in the AP is -30 dBm, and the receiving power of the STA2 in the AP is -28 dBm, if the two STAs are received on the AP side. If the power difference is less than 5 dB, the two STAs can participate in uplink multi-user data transmission.

It should be understood that the AP may also select STAs whose signal arrival angles are close and whose receiving power is close to participate in uplink multi-user data transmission.

Optionally, the AP may determine which STAs can participate in the uplink multi-user transmission according to the relationship between the STAs. Specifically, after the STA listens to the signal strength of the neighboring STAs, the STA reports the neighboring STA list whose signal strength is greater than a certain threshold to the AP. The AP determines which STAs can participate from the neighbor STA list reported by the STA. Uplink multi-user transmission. It should be noted that the foregoing threshold value may be set by the AP and then sent to the STA, or may be set by the STA itself.

Further, the AP may pre-group the STA according to the uplink multi-user data transmission condition, and the AP may schedule the related STA to participate in the uplink multi-user data transmission according to the group number. Exemplary The basic service set of a WLAN includes one AP and four STAs associated with the AP, and the AP divides the STA into two groups according to whether the uplink multi-user data transmission condition is met. Group 1 includes STA1 and STA2, STAs in Group 1 satisfy uplink multi-user data transmission conditions; Group 2 includes STA3 and STA4, and STAs in Group 2 do not satisfy uplink multi-user data transmission conditions. In the foregoing manner, the AP can schedule the STA that meets the uplink multi-user data transmission condition to participate in the uplink data transmission according to the group number.

Optionally, the manner in which the access point AP sends the scheduling frame to the multiple site STAs adopts multicast or broadcast. Specifically, if the AP needs to send the scheduling frame to all STAs associated with it, broadcast transmission may be adopted; if the AP needs to send the scheduling frame to a part of the STA associated with it, multicast transmission may be adopted. Exemplarily, the basic service set of one WLAN includes 1 AP and 4 associated STAs, the AP classifies STA1 and STA2 into group 1, and the AP classifies STA3 and STA4 into group 2, if the AP sends the same data. For STA1-STA4, the data transmission mode of the AP can be broadcast. If the AP sends the same data to group 1, the data transmission mode of the AP can be multicast.

Optionally, the identifier of the STA that participates in the uplink data transmission includes the medium access control MAC address of the STA or the association identifier of the STA, and the resource allocation information of the STA that participates in the uplink data transmission includes any one or any combination of the following: The resource block, the number of space-time streams of the STA, or the modulation and coding strategy MCS of the STA.

Specifically, the identifier of the STA participating in the uplink data transmission includes, but is not limited to, a STA identifier or a combination of the STA identifier and the BSS identifier. Further, the STA identifier includes a MAC address of the STA, an associated identifier of the STA (English: Associated Identification, AID for short), or a partial AID (abbreviation: PAID, English: Partial AID). Exemplarily, the MAC address of the STA may be AC-FD-EC-DB-BE-E1, the MAC address of the STA includes 48 bits, occupies 6 bytes, the AID occupies 2 bytes, and the partial AID compresses the AID. , using fewer bits.

The combination of the STA identifier and the BSS identifier includes a combination of the MAC address of the STA and the MAC address portion of the BSS, the AID of the STA or the combination of the MAC address of the PAID and the BSS, and the PAID of the STA. The combination of the MAC address part of the BSS, the combination of the STA's AID and the BSS Color, or the combination of the STA's PAID and BSS Color. It should be noted that the BSS Color is an information field that distinguishes adjacent BSSs by a small number of bits, and is used to distinguish adjacent BSSs.

Specifically, the resource allocation information of the STAs participating in the uplink data transmission includes any one or any combination of the following: a resource block of the STA, a space-time stream of the STA, or a modulation and coding policy MCS of the STA. It should be understood that, if the OFDMA transmission mode is adopted, the resource allocation information of the AP to the STA includes the working subchannel of the STA, the subcarrier range of the STA, or the time-frequency resource block of the STA; if the MIMO or MU-MIMO transmission mode is adopted, the AP pairs the STA. The resource allocation information includes the number of space-time streams of the STA.

Specifically, the resource allocation information of the AP to the STA further includes an MCS of the STA, where the MCS is used to indicate the coding and modulation parameters used by the STA in uplink data transmission.

Step 202: The AP receives uplink data sent by the primary STA and the secondary STA, and the uplink data transmission manner includes any one or any combination of the following: multi-user multiple input multiple output MU-MIMO mode or orthogonal frequency The division multiple access OFDMA method.

Specifically, if the AP indicates the uplink MU-MIMO transmission method in the trigger frame, the AP receives the uplink MU-MIMO receiving method. For example, the AP adopts a beamforming method; if the AP is in the trigger frame, If the transmission method of the OFDMA is only indicated, the AP adopts the reception method of OFDMA when receiving the AP; if the AP indicates that the transmission method is OFDMA+MU-MIMO in the trigger frame, the AP uses the OFDMA reception method and has the uplink MU in the OFDMA. An uplink MU-MIMO receiving method is also required on the subchannel/subcarrier range/frequency resource block of the MIMO data.

It should be noted that, in the beamforming, the AP periodically sends a training signal to the STA, and the STA performs channel estimation based on the training signal, calculates the quantized channel information, and feeds back to the AP, so that the AP can send the directed data packet according to the channel information. For the STA, the gain in the direction of the STA is enhanced. Illustratively, beamforming is that the AP estimates the channel through the HEW-LTF (English: High Efficiency WLAN-Long Training Field) in the Efficient Signaling field.

In order to better understand the foregoing solution, the embodiment of the present invention refines the step 202, and details how the AP receives the uplink data sent by the primary STA and the secondary STA in the case of step 202.

As shown in FIG. 2a, FIG. 2a is a schematic flow diagram of a method for transmitting data according to an embodiment of the present invention.

Step 202: The AP receives a traditional preamble field in the uplink data sent by the primary STA by using a single user receiving mode, where the traditional preamble field carries channel occupation time information of uplink data transmission.

Specifically, the channel occupation time information includes, but is not limited to, the number of bits of the uplink data, the length of the uplink data, or the duration of the uplink data.

Step 202b: After receiving the high-efficiency signaling field in the uplink data sent by the primary STA by using the single-user receiving mode, the AP receives the uplink data sent by the primary STA and the secondary STA in a multi-user receiving mode. Efficient leading and data fields.

It should be noted that the single-user receiving mode is that the AP receives data sent by one STA. In this embodiment, the AP receives the traditional preamble field and the high-efficiency signaling field of the primary STA in a single-user receiving mode. The multi-user receiving mode is that the AP receives data sent by multiple STAs. In this embodiment, the AP receives the high-efficiency preamble field and the data field sent by the primary STA and the secondary STA in the multi-user receiving mode.

Step 203: After receiving the uplink data, the AP sends an acknowledgement message to the primary STA and the secondary STA.

Optionally, as another embodiment, the manner in which the AP replies to the acknowledgment message includes a downlink MU-MIMO mode, a downlink OFDMA mode, or a dedicated broadcast frame mode.

Based on the foregoing technical solution, in an uplink multi-user multiple-input multiple-output transmission process, the AP performs scheduling on the associated multiple STAs to divide the STA into a primary STA and a secondary STA, and the AP obtains the high-efficiency signaling field sent by the primary STA. The length of the transmission data of the primary STA, the AP adopts the uplink MU-MIMO and OFDMA technologies to implement the primary STA and the secondary STA to simultaneously participate in the uplink data transmission, thereby improving the uplink data transmission efficiency.

Embodiments of the present invention provide a data transmission method for a wireless local area network WLAN, and the number is The transmission method is applied to STA1, STA2 or STA3 in Fig. 1. FIG. 3 is an exemplary block diagram of the data transmission method, and the specific steps are as follows:

Step 301: The station STA receives the scheduling frame sent by the access point AP, where the scheduling frame includes the identifier of the STA participating in the uplink data transmission and the priority information used to distinguish the primary STA from the secondary STA.

Optionally, the scheduling frame further includes resource allocation information of the STA that participates in uplink data transmission, where the resource allocation information of the STA includes any one or any combination of the following: a time-frequency resource block of the STA, and an empty space of the STA. Time stream number or modulation and coding strategy MCS of the STA.

It should be noted that the information included in the scheduling frame has been explained in detail in the foregoing embodiment, and details are not described herein again.

Step 302: The STA determines, according to the received scheduling frame, that the STA itself is the primary STA or the secondary STA.

Optionally, the determining, by the STA, that the STA is the primary STA or the secondary STA according to the received scheduling frame includes: determining, by the STA, the identifier of the STA participating in uplink data transmission in the scheduling frame. Whether to participate in uplink data transmission. Specifically, the STA first determines whether to participate in the uplink multi-user transmission according to the STA identifier in the scheduling frame. If the STA participates in the uplink multi-user transmission, the STA prepares for uplink multi-user transmission in the next time. data. It should be noted that the data transmitted by the uplink multi-user may also be ready, but the transmission mode and parameters need to be adjusted according to the information indicated in the scheduling frame. If the STA does not participate in the uplink multi-user transmission, the STA may select to enter a sleep state according to the duration information to be occupied in the scheduling frame to save power overhead.

Further, the STA participating in the uplink data transmission is determined to be the primary STA or the secondary STA according to the priority information in the scheduling frame.

Step 303: The primary STA or the secondary STA sends uplink data to the AP, where the uplink data transmission mode includes any one or any combination of the following: multi-user multiple input multiple output MU-MIMO mode or orthogonal frequency division multiple Address OFDMA mode.

It should be noted that the multi-user multiple-input multiple-output MU-MIMO method and the orthogonal frequency division multiple access (OFDMA) mode used in the transmission mode of the uplink data have been explained in detail in the foregoing embodiments, and details are not described herein again.

Optionally, the sending, by the primary STA, the uplink data to the AP includes: after receiving the fixed duration of the scheduling frame, the primary STA sends, to the AP, uplink data that carries a traditional preamble field and an effective signaling field. .

Further, the traditional preamble field or the high efficiency signaling field carries channel occupation time information of uplink data transmission. Specifically, the frame structure of the traditional preamble field is as shown in FIG. 3a, and the traditional preamble field includes a traditional short training sequence field (English: Legacy Short Training Field, L-STF for short), and a traditional long training sequence field ( English: Legacy Long Training Field (L-LTF) and traditional signaling domain (English: Legacy Signaling Field, L-SIG for short). Among them, the L-SIG contains two information fields, Rate and Length. Illustratively, the rate (Rate) is 10 Mbit/s and the length (Length) is 10 KB. The receiving end can obtain the length of the current primary STA data by 8 ms by reading the two information fields. It should be noted that the high-efficiency signaling field sent by the primary STA may also include a length or a duration, and the secondary STA may also obtain the length of the current primary STA data when the information field is read. .

Optionally, a dedicated information field may also be used in the efficient signaling field HEW-SIG to indicate the exact data length of the current primary STA.

Based on the foregoing technical solution, the primary STA obtains the uplink data length of the primary STA by sending the uplink data carrying the traditional preamble field and the high-efficiency signaling field to the AP in the process of the uplink multi-user multiple-input multiple-output transmission.

Optionally, as another embodiment, the sending, by the secondary STA, the uplink data to the AP includes: listening to the traditional preamble sent by the primary STA after the secondary STA receives the fixed duration of the scheduling frame. The field or efficient signaling field determines its own transmit data length.

In order to better understand the foregoing solution, the embodiment of the present invention interprets how the secondary STA determines its own transmission user data length by listening to the traditional preamble field or the high efficiency signaling field sent by the primary STA.

Figure 4 is an exemplary sub-graph of the process of the process, the specific steps are as follows:

Step 401: The secondary STA listens to a traditional preamble field or an efficient signaling field sent by the primary STA.

Step 402: The secondary STA acquires a data length to be sent by the primary STA according to the traditional preamble field or the high-efficiency signaling field.

Specifically, it has been described in the foregoing embodiments that the legacy preamble field transmitted by the primary STA includes an L-SIG, which includes two information fields, Rate and Length. Illustratively, the rate (Rate) is 10 Mbit/s and the length (Length) is 10 KB. The secondary STA can obtain the length of the current primary STA data by 8 ms by reading the two information fields. The high-efficiency signaling field sent by the primary STA may also include a field such as a length or a duration, and the secondary STA may also acquire the length of the current primary STA data when the information field is read.

Step 403: The secondary STA determines its own transmission data length according to the length of the data to be sent by the primary STA.

Exemplarily, it can be known from step 403 that the exact length of the primary STA data is 8 ms, and the secondary STA adjusts its own transmission data length to be less than or equal to 8 ms.

Optionally, the high-efficiency preamble field in the uplink data sent by the secondary STA is aligned with the high-efficiency preamble field in the uplink data sent by the primary STA, or the data field in the uplink data sent by the secondary STA and the uplink sent by the primary STA. The data fields in the data are aligned. It should be noted that the alignment may refer to that the primary STA and the secondary STA send the first OFDM symbol at the same time, and may also mean that the time difference between the primary STA and the secondary STA sending the first OFDM symbol is less than the length of the cyclic prefix. The embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.

Optionally, after the STA sends the uplink data to the AP, the STA receives the acknowledgement message sent by the AP.

Based on the foregoing technical solution, in the process of uplink multi-user multiple-input multiple-output transmission, the secondary STA aligns the uplink data sent by itself with the uplink data sent by the primary STA according to the uplink data length of the detected primary STA, thereby improving the uplink. Data transmission efficiency.

The embodiment of the invention provides a data transmission method for a wireless local area network WLAN, and the data transmission method is applied between an access point AP and a station STA. FIG. 5 is a detailed interaction diagram of the data transmission method, and the specific steps are as follows:

Step 501: The access point AP sends a scheduling frame to STA1, STA2, and STA3.

Step 502: After the STA1 passes the fixed duration, the traditional preamble field and the high-efficiency signaling field are sent to the access point AP, and the STA2 and the STA3 listen to the traditional preamble field sent by the STA1, and the STA2 and the STA3 complete the transceiving and switching.

Optionally, as another embodiment, the traditional preamble field or the high efficiency signaling field carries channel occupation time information of STA1 uplink data transmission. Therefore, the AP obtains the uplink data length of STA1 through the traditional preamble field or the high-efficiency signaling field sent by STA1, and STA2 and STA3 obtain the uplink data length of STA1 by listening to the traditional preamble field or the high-efficiency signaling field sent by STA1, STA2 and STA3 adjusts its own uplink data length according to the uplink data length of STA1.

It should be noted that the fixed duration includes, but is not limited to, SIFS (Short Inter-Frame Spacing, short: short frame interval).

Step 503: STA1, STA2, and STA3 simultaneously send an efficient preamble field and a data field to the AP.

Optionally, as another embodiment, the efficient preamble field in the uplink data sent by STA2 and STA3 is aligned with the efficient preamble field in the uplink data sent by STA1.

Optionally, as another embodiment, the data field in the uplink data sent by STA2 and STA3 is aligned with the data field in the uplink data sent by STA1.

It should be noted that the alignment may refer to STA1 and STA2 transmitting the first OFDM symbol at the same time, and may also mean that the time difference between STA1 and STA2 sending the first OFDM symbol is less than the length of the cyclic prefix. The embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.

It should be noted that the multi-user multiple input multiple output MU-MIMO method and the orthogonal frequency division multiple access OFDMA method used in the uplink data transmission manners of STA1, STA2, and STA3 have been explained in detail in the foregoing embodiments, and are not explained here. Let me repeat.

Step 504: After receiving the uplink data of STA1, STA2, and STA3, the AP returns a block acknowledgement message.

Based on the above technical solution, in the process of uplink multi-user multiple input multiple output transmission, AP The associated multiple STAs are scheduled, and the STAs are divided into a primary STA and a secondary STA. The uplink MU-MIMO and OFDMA technologies are used to implement the uplink data transmission by the primary STA and the secondary STA simultaneously, thereby improving the uplink data transmission efficiency.

6 is a schematic block diagram of a data transmission apparatus in a wireless local area network according to an embodiment of the present invention. The data transmission device is, for example, an access point or a dedicated circuit or chip that implements related functions. The data transmission device 60 shown in FIG. 6 includes a processing unit 601 and a transceiver unit 602. For example, the communication device 60 can be the AP shown in FIG.

The processing unit 601 is configured to generate a scheduling frame, where the scheduling frame includes an identifier of the STA participating in the uplink data transmission and priority information used to distinguish the primary STA from the secondary STA.

The transceiver unit 602 is configured to send the scheduling frame, and receive uplink data sent by the primary STA and the secondary STA, where the uplink data transmission manner includes any one or any combination of the following: multi-user multiple input multiple output MU - MIMO mode or orthogonal frequency division multiple access OFDMA mode. It should be noted that the MU-MIMO transmission mode and the OFDMA transmission mode have been described in detail in the foregoing embodiments, and details are not described herein again.

Optionally, the receiving, by the transceiver unit 602, the uplink data sent by the primary STA and the secondary STA specifically includes:

The transceiver unit 602 receives the traditional preamble field in the uplink data sent by the primary STA in a single-user receiving mode, where the traditional preamble field carries channel occupation time information of the uplink data transmission. Specifically, the channel occupation time information includes, but is not limited to, the number of bits of the uplink data, the length of the uplink data, or the duration of the uplink data.

Receiving, by the transceiver unit 602, the high-efficiency signaling field in the uplink data sent by the primary STA by using the single-user receiving mode, and receiving the high-efficiency preamble in the uplink data sent by the primary STA and the secondary STA in a multi-user receiving mode. Fields and data fields. It should be noted that the single-user receiving mode is that the AP receives data sent by one STA. In this embodiment, the AP receives the traditional preamble field and the high-efficiency signaling field of the primary STA in a single-user receiving mode. The multi-user receiving mode is that the AP receives data sent by multiple STAs. In this embodiment, the AP receives the high-efficiency preamble field and the data field sent by the primary STA and the secondary STA in the multi-user receiving mode.

Optionally, the data transmission device further includes a selection unit 603.

The selecting unit 603 is configured to select, before the sending and receiving unit 602 sends the scheduling frame to the multiple station STAs, the STA that meets the uplink multi-user data transmission condition, where the uplink multi-user data transmission condition includes any one or any combination of the following: from the STA The angle of arrival of the signal or the received power from the STA. Specifically, the AP obtains a distribution angle between the STA and the AP according to the signal arrival angle from the STA, and the AP obtains the distance between the STA and the AP according to the received power from the STA. The embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments should fall within the protection scope of the embodiments of the present invention.

Specifically, the selecting unit 603 may select an STA whose signal arrival angle is close to participate in uplink multi-user data transmission, for example, using an AP as an origin to establish a coordinate system, and if the signal arrival angle between the two STAs is less than 5°, the two STAs Can participate in uplink multi-user data transmission.

Specifically, the selecting unit 603 may also select the STAs with similar receiving power to participate in the uplink multi-user data transmission, for example, the receiving power of the STA1 in the AP is -30 dBm, and the receiving power of the STA2 in the AP is -28 dBm, if the two STAs are on the AP side. The received power difference is less than 5 dB, and the two STAs can participate in uplink multi-user data transmission.

It should be understood that the selecting unit 603 may also select an STA whose signal arrival angle is close and whose receiving power is close on the AP side to participate in uplink multi-user data transmission.

Optionally, the selecting unit 603 may pre-group the STA according to the uplink multi-user data transmission condition, and the selecting unit 603 may schedule the related STA to participate in the uplink multi-user data transmission according to the group number. Exemplarily, the basic service set of one WLAN includes one AP and four STAs associated with the AP, and the AP divides the STA into two groups according to whether the uplink multi-user data transmission condition is met. Group 1 includes STA1 and STA2, STAs in Group 1 satisfy uplink multi-user data transmission conditions; Group 2 includes STA3 and STA4, and STAs in Group 2 do not satisfy uplink multi-user data transmission conditions. In the foregoing manner, the AP can schedule the STA that meets the uplink multi-user data transmission condition to participate in the uplink data transmission according to the group number.

Optionally, the transceiver unit 602 sends a scheduling frame to multiple STAs in a manner, using multicast or broadcast. Specifically, if the AP needs to send the scheduling frame to all STAs associated with it, broadcast transmission may be adopted; if the AP needs to send the scheduling frame to a part of the STA associated with it, multicast transmission may be adopted. Illustratively, the basic service set of one WLAN includes 1 AP and 4 associated STAs, the AP classifies STA1 and STA2 into group 1, and the AP categorizes STA3 and STA4 For group 2, if the AP sends the same data to STA1-STA4, the data transmission mode of the AP can be broadcast. If the AP sends the same data to group 1, the data transmission mode of the AP can be multicast.

Optionally, the identifier of the STA that participates in the uplink data transmission includes the medium access control MAC address of the STA or the association identifier of the STA, and the resource allocation information of the STA that participates in the uplink data transmission includes any one or any combination of the following: The resource block, the number of space-time streams of the STA, or the modulation and coding strategy MCS of the STA. This part of the content has been elaborated in the foregoing embodiment, and details are not described herein again.

Optionally, after receiving, by the transceiver unit 602, the transceiver unit 602 sends an acknowledgement message to the primary STA and the secondary STA, where the manner of replying the acknowledgement message includes downlink MU-MIMO mode, downlink OFDMA mode, or dedicated mode. Broadcast frame mode. The embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.

7 is a schematic block diagram of a communication device in a wireless local area network according to an embodiment of the present invention. The device is, for example, a site or a dedicated circuit or chip that implements related functions. The communication device 70 shown in FIG. 7 includes a transceiver unit 701 and a processing unit 702. For example, communication device 70 may be STA 1, STA 2 or STA 3 shown in FIG.

The transceiver unit 701 is configured to receive a scheduling frame sent by the access point AP, and send uplink data to the AP, where the scheduling frame includes an identifier of a STA that participates in uplink data transmission, and is used to distinguish between the primary STA and the secondary STA. Priority information, the uplink data transmission manner includes any one or any combination of the following: a multi-user multiple input multiple output MU-MIMO mode or an orthogonal frequency division multiple access OFDMA mode.

The processing unit 702 is configured to determine, according to the received scheduling frame, that it is the primary STA or the secondary STA.

The processing unit 702 determines to participate in the uplink data transmission according to the identifier of the STA that participates in the uplink data transmission in the scheduling frame, and determines, according to the priority information in the scheduling frame, that it is the primary STA or the secondary STA.

Specifically, the processing unit 702, according to the received scheduling frame, determining that the primary STA or the secondary STA specifically includes: the processing unit 702 determines, according to the identifier of the STA participating in the uplink data transmission in the scheduling frame, Whether to participate in uplink data transmission. Specifically, the STA first determines whether to participate in the uplink multi-user transmission according to the scheduling frame. If the STA participates in the uplink multi-user transmission, the STA prepares data for uplink multi-user transmission in the next time. It should be noted that the data transmitted by the uplink multi-user may also be ready, but the transmission mode and parameters need to be adjusted according to the information indicated in the scheduling frame. If the STA does not participate in the uplink multi-user transmission, the STA may select to enter a sleep state according to the duration information to be occupied in the scheduling frame to save power overhead. Further, the STA participating in the uplink data transmission is determined to be the primary STA or the secondary STA according to the priority information in the scheduling frame.

It should be noted that the multi-user multiple-input multiple-output MU-MIMO method and the orthogonal frequency division multiple-access (OFDMA) mode adopted by the transceiver unit 701 in the uplink data transmission have been explained in detail in the foregoing embodiments, and details are not described herein again.

Optionally, the sending, by the primary STA, uplink data to the AP includes: after receiving, by the transceiver unit, a fixed duration of the scheduling frame, the transceiver unit sends the legacy preamble field and the high-efficiency signaling to the AP. The upstream data of the field. It should be noted that the fixed duration includes, but is not limited to, SIFS (Short Inter-Frame Spacing, short: short frame interval).

Further, the traditional preamble field or the high efficiency signaling field carries channel occupation time information of uplink data transmission. It should be noted that the channel occupation time information has been described in detail in the foregoing embodiments, and details are not described herein again.

Optionally, as another embodiment, the sending, by the secondary STA, uplink data to the AP includes: after receiving, by the transceiver unit, a fixed duration of the scheduling frame, the secondary STA is configured to listen to the primary STA. The transmitted legacy preamble field or the efficient signaling field determines its own transmitted data length. It should be noted that the fixed duration includes, but is not limited to, SIFS (Short Inter-Frame Spacing, short: short frame interval).

In order to better understand the foregoing solution, the embodiment of the present invention explains how the secondary STA determines the length of the transmitted user data by listening to the traditional preamble field or the high-efficiency signaling field sent by the primary STA. The specific steps are as follows:

Step 1: The receiving unit listens to a traditional preamble field or an efficient signaling field sent by the primary STA.

Step 2: The processing unit acquires a data length of the primary STA to be sent according to the traditional preamble field or the high efficiency signaling field.

Step 3: The processing unit determines its own transmission data length according to the data length of the primary STA to be transmitted.

Optionally, the data transmission device further includes an adjustment unit 703.

The adjusting unit 703 is configured to adjust the high-efficiency preamble field in the uplink data sent by the secondary STA to be aligned with the high-efficiency preamble field in the uplink data sent by the primary STA, or the data field and the primary STA in the uplink data sent by the secondary STA The data fields in the sent upstream data are aligned. It should be noted that the alignment may refer to that the primary STA and the secondary STA send the first OFDM symbol at the same time, and may also mean that the time difference between the primary STA and the secondary STA sending the first OFDM symbol is less than the length of the cyclic prefix. The embodiments of the present invention are not limited thereto, and it should be understood that the above embodiments are all within the scope of protection of the embodiments of the present invention.

FIG. 8 is a schematic block diagram of an access point according to another embodiment of the present invention.

The access point 80 of FIG. 8 can be used to implement the steps and methods in the foregoing method embodiments. In the embodiment of FIG. 80, the access point 80 includes an antenna 810, a transmitter 820, a receiver 830, and a processor. 840 and memory 850. Processor 840 controls the operation of access point 80 and can be used to process signals. Memory 850 can include read only memory and random access memory and provides instructions and data to processor 840. Transmitter 820 and receiver 830 can be coupled to antenna 810. The various components of access point 80 are coupled together by a bus system 860, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 860 in the figure. For example, access point 80 can be the AP shown in FIG.

Specifically, the memory 850 can store instructions to perform the following process:

The access point AP sends a scheduling frame to a plurality of station STAs, where the scheduling frame includes an identifier of the STA participating in the uplink data transmission and priority information for distinguishing the primary STA from the secondary STA.

The AP synchronously receives the uplink data sent by the primary STA and the secondary STA, and the transmission manner of the uplink data includes any one or any combination of the following: multi-user multiple input multiple output MU-MIMO mode or orthogonal frequency division multiple Address OFDMA mode.

After receiving the uplink data, the AP sends an acknowledgement message to the primary STA and the secondary STA.

It should be noted that the uplink multi-user data transmission condition has been explained in detail in the foregoing embodiment, and details are not described herein again.

Optionally, the manner in which the access point AP sends the scheduling frame to the multiple site STAs adopts multicast or broadcast. Specifically, if the AP needs to send the scheduling frame to all STAs associated with it, broadcast transmission may be adopted; if the AP needs to send the scheduling frame to a part of the STA associated with it, multicast transmission may be adopted. Exemplarily, the basic service set of one WLAN includes 1 AP and 4 associated STAs, the AP classifies STA1 and STA2 into group 1, and the AP classifies STA3 and STA4 into group 2, if the AP sends the same data. For STA1-STA4, the data transmission mode of the AP can be broadcast. If the AP sends the same data to group 1, the data transmission mode of the AP can be For multicast.

It should be noted that the identifier of the STA that participates in the uplink data transmission and the resource allocation information of the STA that participates in the uplink data transmission have been explained in detail in the foregoing embodiments, and details are not described herein again.

Further, how the AP receives the uplink data sent by the primary STA and the secondary STA specifically includes:

Step 1: The AP receives the traditional preamble field in the uplink data sent by the primary STA by using the single-user receiving mode, where the traditional preamble field carries the channel occupation time information of the uplink data transmission.

Step 2: After receiving the high-efficiency signaling field in the uplink data sent by the primary STA by using the single-user receiving mode, the AP receives the uplink data sent by the primary STA and the secondary STA in a multi-user receiving mode. Efficient leading and data fields.

The site 90 of Figure 9 can be used to implement the various steps and methods of the above method embodiments. In the embodiment of FIG. 90, station 90 includes an antenna 910, a transmitter 920, a receiver 930, a processor 940, and a memory 950. Processor 940 controls the operation of station 90 and can be used to process signals. Memory 950 can include read only memory and random access memory and provides instructions and data to processor 940. Transmitter 920 and receiver 930 can be coupled to antenna 910. The various components of the station 90 are coupled together by a bus system 960, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 960 in the figure. For example, station 90 can be STA1, STA2 or STA3 as shown in FIG.

Specifically, the memory 950 can store instructions to perform the following process:

The station STA receives the scheduling frame sent by the access point AP, where the scheduling frame includes the identifier of the STA participating in the uplink data transmission and the priority information used to distinguish the primary STA from the secondary STA.

The STA determines, according to the received scheduling frame, that the STA itself is the primary STA or the secondary STA.

The primary STA or the secondary STA sends uplink data to the AP, where the uplink data transmission manner includes any one or any combination of the following: multi-user multiple input multiple output MU-MIMO mode or orthogonal frequency division multiple access OFDMA mode .

Optionally, the determining, by the STA, that the STA is the primary STA or the secondary STA according to the received scheduling frame includes: the STA according to the participating uplink data in the scheduling frame. The STA of the transmitted STA identifies the STA identifier to determine whether to participate in uplink data transmission. Specifically, the STA first determines whether to participate in the uplink multi-user transmission according to the STA identifier in the scheduling frame. If the STA participates in the uplink multi-user transmission, the STA prepares for uplink multi-user transmission in the next time. data. It should be noted that the data transmitted by the uplink multi-user may also be ready, but the transmission mode and parameters need to be adjusted according to the information indicated in the scheduling frame. If the STA does not participate in the uplink multi-user transmission, the STA may select to enter a sleep state according to the duration information to be occupied in the scheduling frame to save power overhead. Further, the STA participating in the uplink data transmission determines whether it is the primary STA according to the priority information in the scheduling frame.

Further, the traditional preamble field or the high efficiency signaling field carries channel occupation time information of uplink data transmission.

Step 1: The secondary STA listens to a traditional preamble field or an efficient signaling field sent by the primary STA.

Step 2: The secondary STA obtains according to the traditional preamble field or the high-efficiency signaling field. The length of the data to be sent of the primary STA is taken.

Step 3: The secondary STA determines its own transmission data length according to the data length of the primary STA to be transmitted.

Optionally, in another embodiment, the efficient preamble field in the uplink data sent by the secondary STA is aligned with the efficient preamble field in the uplink data sent by the primary STA, or the data field in the uplink data sent by the secondary STA. Align with the data field in the uplink data sent by the primary STA.

Optionally, as another embodiment, after sending the uplink data to the AP, the STA receives the acknowledgement message sent by the AP.

It should be understood that, in various embodiments of the present invention, the size of the serial 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 implemented by the present invention. The implementation of the examples constitutes any limitation.

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 apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, actual There may be additional divisions at present, for example multiple units or components may be combined or integrated into another system, or some features may be omitted or not implemented. 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, that is, may be located in one place, or may be distributed to multiple network units. 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. Specifically, it can be implemented by means of software and necessary general hardware. The general-purpose hardware includes a general-purpose integrated circuit, a general-purpose CPU, a general-purpose memory, a general-purpose component, and the like, and of course, the dedicated hardware includes an application-specific integrated circuit, a dedicated CPU, and a dedicated memory. , special components, etc. to achieve.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (English: Read-Only Memory, abbreviated as ROM), a random access memory (English: Random Access Memory, abbreviated as RAM), a magnetic disk or an optical disk, and the like. A variety of media that can store program code.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any equivalent person can be easily conceived within the technical scope of the present invention by any person skilled in the art. Modifications or substitutions are intended to be included within the scope of the invention. Therefore, the scope of protection of the present invention should be protected by the scope of the claims. quasi.

Claims

A data transmission method for a wireless local area network (WLAN), characterized in that the method comprises:

The access point AP sends a scheduling frame to a plurality of station STAs, where the scheduling frame includes an identifier of the STA participating in the uplink data transmission and priority information used to distinguish the primary STA from the secondary STA.

The AP receives uplink data sent by the primary STA and the secondary STA, and the uplink data transmission manner includes any one or any combination of the following: multi-user multiple input multiple output MU-MIMO mode or orthogonal frequency division multiple access OFDMA mode;

After receiving the uplink data, the AP sends an acknowledgement message to the primary STA and the secondary STA.
The method according to claim 1, wherein the receiving, by the AP, the uplink data sent by the primary STA and the secondary STA specifically includes:

The AP receives the traditional preamble field in the uplink data sent by the primary STA by using a single user receiving mode, where the traditional preamble field carries channel occupation time information of the uplink data transmission;

After receiving the high-efficiency signaling field in the uplink data sent by the primary STA by using the single-user receiving mode, the AP receives the high-efficiency preamble in the uplink data sent by the primary STA and the secondary STA in a multi-user receiving mode. Fields and data fields.
The method according to claim 1 or 2, wherein before the access point AP sends a scheduling frame to a plurality of station STAs, the method further includes:

The AP selects an STA that satisfies an uplink multi-user data transmission condition, and the uplink multi-user data transmission condition includes any one or any combination of the following: an angle of arrival of a signal from the STA or a received power from the STA.
The method according to any one of claims 1-3, wherein the manner in which the AP replies to the acknowledgment message comprises a downlink MU-MIMO mode, a downlink OFDMA mode or a dedicated broadcast frame mode.
A data transmission method for a wireless local area network (WLAN), characterized in that the method comprises:

The station STA receives the scheduling frame sent by the access point AP, where the scheduling frame includes the identifier of the STA participating in the uplink data transmission and the priority information used to distinguish the primary STA from the secondary STA.

Determining, by the STA, that the STA itself is the primary STA or the secondary STA according to the received scheduling frame;

The primary STA or the secondary STA sends uplink data to the AP, where the uplink data transmission manner includes any one or any combination of the following: multi-user multiple input multiple output MU-MIMO mode or orthogonal frequency division multiple access OFDMA mode .
The method according to claim 5, wherein the determining, by the STA, that the STA itself is the primary STA or the secondary STA according to the received scheduling frame includes:

The STA determines, according to the identifier of the STA that participates in the uplink data transmission in the scheduling frame, that after participating in the uplink data transmission, determining, according to the priority information in the scheduling frame, the primary STA or the secondary STA.
The method according to claim 6, wherein the sending, by the primary STA, the uplink data to the AP comprises:

After receiving the fixed duration of the scheduling frame, the primary STA sends uplink data carrying a traditional preamble field and an efficient signaling field to the AP.
The method according to claim 7, wherein the traditional preamble field or the high efficiency signaling field carries channel occupation time information of uplink data transmission.
The method according to claim 6, wherein the sending, by the secondary STA, the uplink data to the AP comprises:

After receiving the fixed duration of the scheduling frame, the secondary STA determines its own transmission data length by listening to a traditional preamble field or an efficient signaling field sent by the primary STA.
The method according to claim 9, wherein the secondary STA determines its own number of transmissions by listening to a conventional preamble field or an efficient signaling field sent by the primary STA. According to the length, it includes:

The secondary STA listens to a traditional preamble field or an efficient signaling field sent by the primary STA;

And obtaining, by the secondary STA, a data length to be sent by the primary STA according to the traditional preamble field or the high-efficiency signaling field;

The secondary STA determines its own transmission data length according to the data length of the primary STA to be transmitted.
The method according to any one of claims 5 to 10, wherein the efficient preamble field in the uplink data sent by the secondary STA is aligned with the efficient preamble field in the uplink data sent by the primary STA, or the time The data field in the uplink data sent by the STA is aligned with the data field in the uplink data sent by the primary STA.
A data transmission device for a wireless local area network (WLAN), characterized in that the device comprises:

a processing unit, configured to generate a scheduling frame, where the scheduling frame includes an identifier of a STA that participates in uplink data transmission, and priority information used to distinguish between the primary STA and the secondary STA;

The transceiver unit is configured to send the scheduling frame, and receive uplink data sent by the primary STA and the secondary STA, where the uplink data transmission manner includes any one or any combination of the following: multi-user multiple input multiple MU- MIMO mode or orthogonal frequency division multiple access OFDMA mode.
The device according to claim 12, wherein the receiving, by the transceiver unit, the uplink data sent by the primary STA and the secondary STA specifically includes:

The receiving and receiving unit receives a traditional preamble field in the uplink data sent by the primary STA by using a single user receiving mode, where the traditional preamble field carries channel occupation time information of the uplink data transmission;

After receiving the high-efficiency signaling field in the uplink data sent by the primary STA by using the single-user receiving mode, the transceiver unit receives the uplink data sent by the primary STA and the secondary STA in a multi-user receiving mode. Leading and data fields.
Device according to claim 12 or 13, wherein said device is further Including the selection unit,

The selecting unit is configured to select an STA that meets an uplink multi-user data transmission condition before the sending and receiving unit sends a scheduling frame to multiple station STAs, where the uplink multi-user data transmission condition includes any one or any combination of the following: from the STA The angle of arrival of the signal or the received power from the STA.
The data transmission device according to any one of claims 12-14, wherein, after the transceiver unit receives the uplink data, the transceiver unit returns an acknowledgement message to the primary STA and the secondary STA, The manner of replying to the acknowledgement message includes a downlink MU-MIMO mode, a downlink OFDMA mode, or a dedicated broadcast frame mode.
A data transmission device for a wireless local area network (WLAN), characterized in that the device comprises:

The transceiver unit is configured to receive a scheduling frame sent by the access point AP, and send the uplink data to the AP, where the scheduling frame includes an identifier of the STA participating in the uplink data transmission and a priority used to distinguish the primary STA from the secondary STA. Level information, the uplink data transmission manner includes any one or any combination of the following: multi-user multiple input multiple output MU-MIMO mode or orthogonal frequency division multiple access OFDMA mode;

And a processing unit, configured to determine, according to the received scheduling frame, that the primary STA is the primary STA or the secondary STA.
The device according to claim 16, wherein the processing unit determines that the primary STA or the secondary STA is specifically included according to the received scheduling frame:

And the determining, by the processing unit, determining, according to the identifier of the STA participating in the uplink data transmission in the scheduling frame, to participate in the uplink data transmission, determining, according to the priority information in the scheduling frame, the primary STA or the secondary STA.
The apparatus according to claim 17, wherein the sending, by the primary STA, the uplink data to the AP comprises:

After receiving the fixed duration of the scheduling frame, the transceiver unit sends the transceiver unit to The AP transmits uplink data carrying a legacy preamble field and an efficient signaling field.
The apparatus according to claim 18, wherein the legacy preamble field or the high efficiency signaling field carries channel occupation time information of an uplink data transmission.
The apparatus according to claim 17, wherein the sending, by the secondary STA, the uplink data to the AP comprises:

After the transceiver unit receives the fixed duration of the scheduling frame, the secondary STA determines its own transmission data length by listening to a traditional preamble field or an efficient signaling field sent by the primary STA.
The device according to claim 20, wherein the determining, by the secondary STA, the length of the transmission data of the traditional preamble field or the high-efficiency signaling field sent by the primary STA includes:

The transceiver unit listens to a traditional preamble field or an efficient signaling field sent by the primary STA;

The processing unit acquires, according to the traditional preamble field or the high-efficiency signaling field, a data length to be sent by the primary STA;

The processing unit determines its own transmission data length according to the data length of the primary STA to be transmitted.
Apparatus according to any of claims 16-21, wherein said apparatus further comprises an adjustment unit,

The adjusting unit is configured to adjust an alignment between an efficient preamble field in the uplink data sent by the secondary STA and an efficient preamble field in the uplink data sent by the primary STA, or a data field in the uplink data sent by the secondary STA The data fields in the uplink data sent by the primary STA are aligned.