WO2016138639A1

WO2016138639A1 - Downlink data receiving acknowledgement method and device

Info

Publication number: WO2016138639A1
Application number: PCT/CN2015/073590
Authority: WO
Inventors: 朱俊; 庞继勇; 张佳胤; 刘亚林
Original assignee: 华为技术有限公司
Priority date: 2015-03-03
Filing date: 2015-03-03
Publication date: 2016-09-09

Abstract

The present invention relates to the field of wireless communication technologies. Provided in embodiments of the present invention are a downlink data receiving acknowledgement (ACK) method and device for reducing system resource occupancy and improving a system throughput rate. The method comprises: receiving, by a station (STA), a signaling transmitted by an access point (AP), wherein the signaling of the AP is transmitted to m STAs, and the m STAs comprise the STA; if data of the AP transmitted to the STA is not aggregated data, then obtaining, by the STA and according to the signaling, an orthogonal sequence corresponding to the STA; and if the STA correctly receives the data of the AP transmitting to the STA, then generating, by the STA and according to the orthogonal sequence, a corresponding ACK frame, and transmitting, by the STA and at a first timeslot, the ACK frame to the AP.

Description

Method and device for receiving and confirming downlink data

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for receiving and confirming downlink data.

Background technique

Different from the traditional twisted pair copper wire to form a local area network (LAN), wireless local area network (WLAN) can establish a local area network by using wireless communication technology, so that users can access anytime, anywhere. The Internet has brought unprecedented convenience to people's lives and work.

In the WLAN, an access point (AP) usually confirms whether the STA correctly received the downlink data according to an Acknowledgement (ACK) frame replied by the station (Station, STA). Specifically, if the STA successfully receives the data sent by the AP, it will reply an ACK frame to the AP to indicate that the sent data has been correctly received. In the existing WLAN standard, when there are multiple STAs in the downlink, each STA needs to reply to the sending station with an ACK frame in sequence, and the AP receives the ACK frame that the STA replies, confirming that the STA correctly receives the downlink data, and the other The STA can reply to the AP with an ACK frame or a NACK frame. In the WLAN standard-802.11ax standard under development, Orthogonal Frequency Division Multiple Access (OFDMA) technology is introduced to improve the throughput of the system in dense scenes. If the 802.11ax standard uses the receiving and confirming method of the existing standard downlink data, when there are many STAs, it will inevitably occupy more time-frequency resources, resulting in increased system overhead and lower throughput.

To this end, it is necessary to seek a new method for receiving and confirming downlink data to meet the confirmation requirements under the OFDMA technology framework.

Summary of the invention

Embodiments of the present invention provide a method and an apparatus for receiving and confirming downlink data, which can reduce the occupation of system resources under the framework of the OFDMA technology, and can reduce the occupation of system resources. In turn, increase system throughput.

In a first aspect, a method for receiving and confirming downlink data is provided, where the method includes:

The station STA receives the signaling sent by the access point AP, where the signaling is the signaling that the AP sends to the m STAs, where the m STAs include the STA, m≥2, and m is an integer;

If the data sent by the AP to the STA is not aggregated data, the STA acquires an orthogonal sequence corresponding to the STA according to the signaling;

If the STA correctly receives the data sent by the AP to the STA, the STA generates a corresponding ACK frame according to the orthogonal sequence, and sends the ACK frame to the AP in the first time slot.

In a second aspect, a method for receiving and confirming downlink data is provided, where the method includes:

The access point AP sends signaling to the m stations STA, m≥2, where m is an integer;

If the data sent by the AP to the m STAs does not include the aggregated data, the AP receives the ACK frame returned by the STA of the m STAs in the first time slot;

The AP performs cross-correlation operation with the ACK frame by using the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines whether the qth is received according to the correlation peak. An orthogonal sequence, wherein q takes all integer values between 1 and m;

If the AP determines that the qth orthogonal sequence is received, the AP determines the STA corresponding to the qth orthogonal sequence;

The AP confirms that the STA corresponding to the qth orthogonal sequence correctly receives data sent by the AP to the STA.

In a third aspect, a STA is provided, where the STA includes: a first receiving unit, a first acquiring unit, a first generating unit, and a first sending unit;

The first receiving unit is configured to receive the signaling sent by the access point AP, where the signaling is signaling that is sent by the AP to the m STAs, where the m STAs include the STA , m≥2, m is an integer;

The first acquiring unit is configured to acquire, according to the signaling, an orthogonal sequence corresponding to the STA, if the data that is sent by the AP to the STA is not aggregated data;

The first generating unit is configured to generate, according to the orthogonal sequence, a corresponding ACK frame, if the STA correctly receives data sent by the AP to the STA;

The first sending unit is configured to send the ACK frame to the AP in a first time slot.

A fourth aspect provides an access point AP, where the AP includes: a sending unit, a first receiving unit, a first calculating unit, a first determining unit, a second determining unit, and a first confirming unit;

The sending unit is configured to send signaling to the m stations STA, where m≥2, where m is an integer;

The first receiving unit is configured to: if the data sent by the AP to the m STAs does not include aggregated data, receive an ACK frame returned by a STA of the m STAs in a first time slot;

The first calculating unit is configured to perform a cross-correlation operation with the ACK frame by using the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, where q is between 1 and m. All integer values;

The first determining unit is configured to determine, according to the correlation peak, whether the qth orthogonal sequence is received;

The second determining unit is configured to determine, if the first determining unit determines that the qth orthogonal sequence is received, determine the STA corresponding to the qth orthogonal sequence;

The first confirming unit is configured to confirm that the STA corresponding to the qth orthogonal sequence correctly receives data sent by the AP to the STA.

A fifth aspect provides a station STA, where the STA includes: a receiver, a processor, and a transmitter;

The receiver is configured to receive the signaling sent by the access point AP, where the signaling is the signaling that is sent by the AP to the downlink m STAs, where the m STAs include the STA, M≥2, m is an integer;

The processor is configured to:

If the data sent by the AP to the STA is not aggregated data, obtain an orthogonal sequence corresponding to the STA according to the signaling;

If the STA correctly receives the data sent by the AP to the STA, generates a corresponding ACK frame according to the orthogonal sequence;

The transmitter is configured to send the ACK frame to the AP in a first time slot.

A sixth aspect provides an access point AP, where the AP includes: a transmitter, a receiver, and a processor;

The transmitter is configured to send signaling to the m stations STA, where m≥2, where m is an integer;

The receiver is configured to: if the data sent by the AP to the m STAs does not include aggregated data, receive an ACK frame and/or a NACK frame replied by a STA of the m STAs in a first time slot;

The processor is configured to:

Correlating the ACK frame with the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, where q takes all integer values between 1 and m;

And determining, according to the correlation peak, whether the qth orthogonal sequence is received;

And determining, by the determining, that the qth orthogonal sequence is received, determining the STA corresponding to the qth orthogonal sequence;

And determining, by the STA corresponding to the qth orthogonal sequence, that the STA sends the data sent by the AP to the STA.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

Based on the foregoing solution, the STA may acquire an orthogonal sequence corresponding to the STA according to the signaling sent by the AP, and generate a corresponding ACK frame according to the orthogonal sequence. Therefore, when there are multiple STAs in the downlink, each STA can simultaneously reply to the AP with an ACK frame (both in the first time slot). After receiving the ACK frame that multiple STAs reply at the same time, the AP can determine the corresponding STA according to the received ACK frame, and then determine that the STA correctly receives the data sent by the AP. On the one hand, since each STA does not individually reply to the AP with its own ACK frame in order, it simultaneously returns an ACK frame to the AP. Therefore, the occupation of system resources can be reduced. On the other hand, compared with the ACK frame in the prior art, the ACK frame generated by the OFDM frame according to the obtained orthogonal sequence is small, so the system resources occupied by transmitting the ACK frame are relatively small. In summary, the present invention The method for confirming the reception of downlink data provided by the embodiment can reduce the occupation of system resources and further improve the system throughput rate.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of a wireless LAN system architecture;

2 is a schematic flowchart of a method for receiving and confirming downlink data according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart of another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 4 is a schematic flowchart of still another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of still another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 6 is a schematic flowchart of still another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart of still another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 8 is a schematic flowchart of a method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 9 is a schematic flowchart of another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 10 is a schematic flowchart of still another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 11 is a schematic flowchart diagram of still another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 12 is a schematic flowchart diagram of still another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 13 is a schematic flowchart diagram of still another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 14 is a schematic diagram of interaction of a method for receiving and confirming downlink data according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of interaction of another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 16 is a schematic diagram of interaction of another method for receiving and confirming downlink data according to an embodiment of the present disclosure;

FIG. 17 is a schematic structural diagram of a STA according to an embodiment of the present disclosure;

FIG. 18 is a schematic structural diagram of an AP according to an embodiment of the present disclosure;

FIG. 19 is a schematic structural diagram of a STA according to an embodiment of the present disclosure;

FIG. 20 is a schematic structural diagram of an AP according to an 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 only 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 are within the scope of the present invention.

The embodiments of the present invention are applicable to a wireless local area network system. Therefore, in order to facilitate understanding of the embodiments of the present invention, a wireless local area network system is briefly introduced. Referring to FIG. 1, the WLAN system includes: AP11, STA12, Distributed System (DS) 13, and the like. Among them, the STA11 is generally a client, and may be a computer with a wireless network card, or a smart terminal with a Wireless Fidelity (Wi-Fi) module, such as a smart phone, a tablet, a laptop, and the like. The STA 12 can be mobile or fixed.

In a wireless local area network system, an AP11 and a plurality of STAs 12 can form a basic service unit of a wireless local area network (Basic Service Set (BSS) 10; Through the DS 13, a plurality of BSSs 10, in turn, can form an Extend Service Set (ESS) 20, providing greater coverage than a single BSS 10. In each BSS 10, the AP 11 provides an access service for the STA 12, and the STA 12 accesses the network through the AP 11 to perform data interaction with other network devices in the network through the AP 11 . Under the existing WLAN standard, each STA 12 in the BSS 10 needs to separately reply an ACK frame to the AP 11 in sequence, and the AP 11 receives the ACK frame replied by the STA 12, and confirms that the STA correctly receives the downlink data, and the other STAs can reply the ACK to the AP 11. frame. Therefore, when there are many STAs 12 in the BSS 10, more time-frequency resources are used to transmit the ACK frame, which will cause the system to increase the overhead required for receiving the downlink data and reduce the system throughput.

Embodiment 1

The embodiment of the present invention provides a method for receiving and confirming downlink data, which can be applied to the STA 12 in the WLAN system shown in FIG. 1 . Specifically, as shown in FIG. 2 , the method includes:

S201. The STA receives signaling sent by the AP.

The signaling is the signaling that is sent by the AP to the downlink m STAs, where the m STAs include the STA, m≥2, and m is an integer.

It can be understood that the m STAs belong to the same BSS as the AP, and the STA may be any one of the m STAs.

S202. If the data sent by the AP to the STA is not aggregated data, the STA acquires an orthogonal sequence corresponding to the STA according to the signaling.

It should be noted that, in the WLAN, the packet is sent as a Medium Access Control Protocol (MAC) Data Unit (MPDU) when transmitting, and the channel competition and avoidance are required for each transmission, thereby consuming channel resources. . Therefore, in order to improve channel utilization, multiple MPDUs are usually aggregated into one Aggregate-MPDU (A-MPDU) (so only one channel competition or evasion is required, and multiple MPDUs can be completed. At the same time, the technology is called aggregation technology. If the data sent by the AP to the STA adopts the aggregation technology, the data sent by the AP to the STA is aggregated data.

In a possible implementation, the AP and the STA may be pre-stored. And the same orthogonal sequence set, and the corresponding orthogonal sequence is specified by the STA by using the signaling, and after receiving the signaling, the STA may obtain an orthogonal sequence set according to the indication of the signaling. Obtain the corresponding orthogonal sequence. This embodiment of the present invention does not specifically limit this.

S203. If the STA correctly receives the data sent by the AP to the STA, the STA generates a corresponding ACK frame according to the orthogonal sequence, and sends the ACK to the AP in the first time slot. frame.

Specifically, the STA generates a corresponding ACK frame according to the orthogonal sequence, and specifically includes:

The STA generates a corresponding ACK frame by using the orthogonal sequence as a sequence field, where the sequence field includes an Orthogonal Frequency Division Multiplexing (OFDM) symbol; or

The STA uses the orthogonal sequence as a sequence field, and combines a short training field to generate a corresponding ACK frame, where the sequence field includes one OFDM symbol.

It can be seen that, in the method for receiving acknowledgement of downlink data provided by the embodiment of the present invention, only one or two OFDM symbols are needed for transmitting an ACK frame (a short training field occupies one OFDM symbol). Under the existing WLAN standard, the MAC layer format of the ACK frame is as follows:

The frame control field and the duration field each occupy 2 bytes, the receiving address field occupies 6 bytes, and the frame check sequence field occupies 4 bytes, occupying a total of 14 bytes. The STA needs to reply the ACK frame to the AP, and needs to encapsulate the ACK frame into a physical frame, and send the encapsulated physical frame to the OFDM symbol for transmission. In addition to the preamble portion, the transmission of the ACK frame requires 11 OFDM symbols. Therefore, compared with the prior art, in the method for receiving acknowledgement of downlink data provided by the embodiment of the present invention, the overhead of the ACK frame is relatively small.

According to the method for receiving and confirming downlink data provided by the embodiment of the present invention, the STA may acquire an orthogonal sequence corresponding to the STA according to the signaling sent by the AP, and further generate a corresponding ACK frame according to the orthogonal sequence. Therefore, when there are multiple STAs in the downlink, each STA can simultaneously transmit its own ACK frame to the AP (both in the first time slot). After receiving the ACK frame that multiple STAs reply at the same time, the AP can determine the corresponding STA according to the ACK frame, and further determine that the STA correctly receives the data sent by the AP. Different from the prior art, in the method for receiving and confirming the downlink data provided by the embodiment of the present invention, each STA does not separately reply to the AP with the respective ACK frame in order, but simultaneously returns the respective ACK frame to the AP. Therefore, the occupation of system resources can be reduced.

Further, as shown in FIG. 3, in the method for receiving and receiving the downlink data provided by the embodiment of the present invention, after the STA obtains the orthogonal sequence corresponding to the STA according to the signaling, the STA may further include:

S204. If the STA does not correctly receive data sent by the AP to the STA, the STA does not send an acknowledgement frame, or generates a corresponding first negative response according to the reverse polarity sequence of the orthogonal sequence. (Negative Acknowledgement, NACK) frame, and send the NACK frame to the AP in the first time slot.

That is, if the STA does not correctly receive the data, the STA may not send the acknowledgment frame, and if the AP does not receive the acknowledgment frame replied by the STA when receiving the acknowledgement of the downlink data, the STA considers that the STA does not correctly receive the data; The STA may also generate a NACK frame reply to the AP according to the reverse polarity sequence of the obtained orthogonal sequence. If the AP receives the NACK frame replied by the STA when receiving the acknowledgement of the downlink data, the STA considers that the STA is not correctly received. data. This embodiment of the present invention does not specifically limit this.

Specifically, the generating a corresponding NACK frame according to the reverse polarity sequence of the orthogonal sequence may specifically include:

Generating, by the STA, a reverse polarity sequence of the orthogonal sequence as a sequence field, to generate a corresponding NACK frame, where the sequence field includes one OFDM symbol; or

The STA uses the reverse polarity sequence of the orthogonal sequence as a sequence field, and combines a short training field to generate a corresponding NACK frame, where the sequence field includes one OFDM symbol.

It should be noted that, in the embodiment of the present invention, the first time slot is a designated time slot, that is, the STAs in the BSS send an ACK frame to the AP in the designated time slot (first time slot). Or NACK frame.

In a possible implementation manner, the signaling includes the AP to the m The STA performs the sequence indication of the downlink resource allocation, and the STA obtains the orthogonal sequence corresponding to the STA according to the signaling, that is, S202, which may include:

The STA obtains an orthogonal sequence corresponding to the STA according to an order indication that the AP performs downlink resource allocation on the m STAs.

Preferably, the signaling includes, in addition to the sequence indication of the downlink resource allocation by the AP to the m STAs, whether the data sent by the AP to the m STAs is aggregated. First indication of the data,

As shown in FIG. 4, after receiving the signaling sent by the AP (ie, S201), the method for receiving and receiving the downlink data provided by the embodiment of the present invention may further include:

S205. The STA determines, according to the first indication information, whether data sent by the AP to the STA is aggregated data.

S206. If the data sent by the AP to the STA is aggregated data, the STA sequentially receives p MPDUs in data sent by the AP to the STA.

Where p is the number of MPDUs included in the data sent by the AP to the STA.

S207. The STA obtains a first orthogonal sequence corresponding to the first MPDU from the pre-stored orthogonal sequence set according to an order indication that the AP performs downlink resource allocation on the m STAs.

S208. The STA acquires an ith orthogonal corresponding to the i-th MPDU from the pre-stored orthogonal sequence set according to an order of an ith MPDU in data sent by the AP to the STA. sequence.

Where i takes all integer values between 2 and p.

It should be noted that the STA may sequentially acquire the orthogonal sequence in the orthogonal sequence set from the first orthogonal sequence as the i-th orthogonal sequence corresponding to the i-th MPDU, or may be from some (non- The first) orthogonal sequence starts to acquire the orthogonal sequence in sequence as the ith orthogonal sequence corresponding to the i-th MPDU, and may also sequentially acquire orthogonal according to other rules (such as a certain number of orthogonal sequences at a time interval). The sequence is the i-th orthogonal sequence corresponding to the i-th MPDU. This embodiment of the present invention does not specifically limit this.

S209. If the STA correctly receives the first MPDU, the STA And generating, according to the first orthogonal sequence, a corresponding ACK frame, and sending the ACK frame to the AP in the first time slot.

S210. If the STA correctly receives the ith MPDU, the STA generates a corresponding i-th ACK frame according to the ith orthogonal sequence, and sends the first ACK frame to the AP in a second time slot. i ACK frame.

It should be noted that the second time slot described herein is only a time slot different from the first time slot, and is not a specific time slot. Specifically, the second time slot is determined by the STA according to an order indication that the AP performs downlink resource allocation on the m STAs, and each STA corresponds to a unique second time slot. Exemplarily, if the data sent by the AP to the STAs, STA3, and STA5 of the m STAs is aggregated data (the data sent by the AP to the rest of the stations is not aggregated data), and STA2, STA3, and STA5 respectively For the first, third, and fifth of the sequence in which the AP performs downlink resource allocation to the m STAs, the STA sequentially acquires an orthogonal sequence from the first orthogonal sequence as the first The i-th orthogonal sequence corresponding to the i-MPDUs, the second time slot corresponding to STA2 is the first time slot after the end of the first time slot, and the second time slot corresponding to STA3 is the end of the first time slot. In the second time slot afterwards, the second time slot corresponding to STA2 is the third time slot after the end of the first time slot.

In addition, it should be noted that the ith ACK frame represents an ACK frame sent by the STA in the second slot, and does not represent a specific ACK frame.

Further, as shown in FIG. 5, the STA obtains the ith from the pre-stored orthogonal sequence set in the order of the ith MPDU in the data sent by the AP to the STA. After the ith orthogonal sequence corresponding to the MPDUs (ie, S208), the method may further include:

S211. If the STA does not correctly receive the first MPDU, the STA does not send an acknowledgement frame, or generates a corresponding NACK frame according to the reverse polarity sequence of the first orthogonal sequence, and The first time slot sends the NACK frame to the AP.

S212. If the STA does not correctly receive the i-th MPDU, the STA does not send an acknowledgement frame, or generates a corresponding i-th NACK frame according to the i-th orthogonal sequence, and in the second The slot transmits the ith NACK frame to the AP.

It should be noted that, similar to the ith ACK frame, the ith NACK frame only indicates the NACK frame sent by the STA in the second slot, and does not represent a specific NACK frame.

Optionally, the signaling may include, in addition to the sequence indication of the downlink resource allocation by the AP to the m STAs, each of the data sent by the AP to the m STAs. Whether it is the first indication information of the aggregated data and the second indication information of the number of MPDUs included in each aggregated data,

As shown in FIG. 6, after receiving the signaling sent by the AP (ie, S201), the method for receiving and receiving the downlink data provided by the embodiment of the present invention may further include:

S213. The STA determines, according to the first indication information, whether data sent by the AP to the STA is aggregated data.

S214. If the data sent by the AP to the STA is aggregated data, the STA performs an order indication, a second indication information, and a jth MPDU of downlink resource allocation to the m STAs according to the AP. And acquiring, in an order of data sent by the AP to the STA, a j-th orthogonal sequence corresponding to the j-th MPDU from the pre-stored orthogonal sequence set.

Where j takes all integer values between 1 and p.

S215. If the STA correctly receives the jth MPDU, the STA generates a corresponding ACK frame according to the jth orthogonal sequence, and sends the ACK to the AP in the first time slot. frame.

Further, as shown in FIG. 7, the STA instructs, according to the AP, that the APs perform downlink resource allocation, the second indication information, and the jth MPDU are sent to the AP in the AP. After the sequence of the data of the STA is obtained, the j-th orthogonal sequence corresponding to the j-th MPDU is obtained from the pre-stored orthogonal sequence set (ie, S214), and may further include:

S216. If the STA does not correctly receive the jth MPDU, the STA does not send an acknowledgement frame, or generates a corresponding NACK frame according to the reverse polarity sequence of the jth orthogonal sequence. The first time slot sends the NACK frame to the AP.

According to the method for receiving and confirming the downlink data provided by the embodiment of the present invention, the STA may acquire an orthogonal sequence corresponding to the STA according to the signaling sent by the AP, Further, a corresponding ACK frame is generated based on the orthogonal sequence. Therefore, when there are multiple STAs in the downlink, each STA can simultaneously reply to the AP with an ACK frame (both in the first time slot). After receiving the ACK frame that multiple STAs reply at the same time, the AP can determine the corresponding STA according to the ACK frame, and further determine that the STA correctly receives the data sent by the AP.

On the one hand, different from the prior art, in the method for receiving and confirming the downlink data provided by the embodiment of the present invention, each STA does not separately reply to the AP with the respective ACK frame in order, but simultaneously returns an ACK frame to the AP. Therefore, the occupation of system resources can be reduced. On the other hand, compared with the ACK frame in the prior art, the ACK frame generated by the OFDM frame according to the obtained orthogonal sequence is small, so the system resources occupied by transmitting the ACK frame are relatively small.

In summary, the method for receiving and confirming downlink data provided by the embodiment of the present invention can reduce the occupation of system resources, thereby improving system throughput.

Embodiment 2

The embodiment of the present invention provides a method for receiving and confirming downlink data, which can be applied to the AP 11 in the WLAN system shown in FIG.

S801. The AP sends signaling to the m STAs.

Where m≥2, m is an integer.

Specifically, the AP may place the signaling in a signaling field of a preamble, and send the signaling to the m STAs by using a preamble, which is not specifically limited in this embodiment of the present invention.

S802. If data sent by the AP to the m STAs does not include aggregated data, the AP receives an ACK frame returned by a STA of the m STAs in a first time slot.

Where 0 ≤ n ≤ m, and n is an integer.

S803. The AP performs a cross-correlation operation with the ACK frame by using a qth orthogonal sequence in a pre-stored orthogonal sequence set, respectively, to obtain a correlation peak, and determining, according to the correlation peak, whether the first q orthogonal sequences.

Where q takes all integer values between 1 and m.

S804. Determine, if the AP determines that the qth orthogonal sequence is received, the STA corresponding to the qth orthogonal sequence.

S805. The AP confirms that the STA corresponding to the qth orthogonal sequence correctly receives data sent by the AP to the STA.

Further, as shown in FIG. 9 , in the method for receiving and receiving the downlink data provided by the embodiment of the present invention, after the access point AP sends the signaling to the m station STAs (ie, S801), the method may further include:

S806. If the data sent by the AP to the m STAs does not include the aggregated data, the AP receives the NACK frame replied by the STA of the m STAs in the first time slot.

S807. The AP performs cross-correlation operation with the NACK frame by using the qth orthogonal sequence to obtain a correlation peak, and determines, according to the correlation peak, whether to receive the inverse of the qth orthogonal sequence. Polar sequence.

S808. If the AP determines to receive the reverse polarity sequence of the qth orthogonal sequence, the AP determines the STA corresponding to the qth orthogonal sequence.

S809. The AP confirms that the STA corresponding to the qth orthogonal sequence does not correctly receive data sent by the AP to the STA.

Preferably, the signaling may include an order indication that the AP performs downlink resource allocation on the m STAs, and the AP determines an STA corresponding to the qth orthogonal sequence (ie, S804), where include:

Determining, by the AP, the qth orthogonal sequence according to an order of the qth orthogonal sequence in the orthogonal sequence set, and an order indication that the AP performs downlink resource allocation on the m STAs Corresponding STA.

Further, the signaling includes, in addition to the sequence indication of the downlink resource allocation by the AP to the m STAs, whether the data sent by the AP to the m STAs is aggregated. First indication of the data,

As shown in FIG. 10, the method for receiving and confirming downlink data provided by the embodiment of the present invention may be performed after the AP sends signaling to the m station STAs (ie, S801). include:

S810. If the data that is sent by the AP to the first STA of the m STAs is aggregated data, the AP determines the first STA according to an order indication that the AP performs downlink resource allocation on the m STAs. Corresponding second time slot.

In the first time slot:

S811. The AP receives an ACK frame that is returned by a STA of the m STAs.

S812: The AP performs a cross-correlation operation with the ACK frame by using a qth orthogonal sequence in a pre-stored orthogonal sequence set, respectively, to obtain a correlation peak, and determining, according to the correlation peak, whether the first q orthogonal sequences.

Where q takes all integer values between 1 and m.

S813. If the AP determines that the qth orthogonal sequence is received, according to the sequence of the qth orthogonal sequence in the orthogonal sequence set, and the AP performs downlink on the m STAs. The sequence of resource allocation indicates that the STA corresponding to the qth orthogonal sequence is determined.

S814. If the STA corresponding to the qth orthogonal sequence is the first STA, the AP confirms that the first STA correctly receives the first MPDU in the data sent by the AP to the STA.

S815. If the STA corresponding to the qth orthogonal sequence is not the first STA, the AP confirms that the STA corresponding to the qth orthogonal sequence correctly receives data sent by the AP to the STA.

And/or in the second time slot:

S816. The AP receives a kth ACK frame that is sent by the first STA.

Where k is one or more integer values between 2 and K, and K is the number of MPDUs included in the data sent by the AP to the first STA.

S817. The AP performs a cross-correlation operation with the kth ACK frame in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines whether the received peak is received according to the correlation peak. The tth orthogonal sequence is described.

Where t is the integer value between 1 and T, and T is determined by the AP according to the downlink resource allocation of the m STAs by the AP.

S818. If the AP determines that the tth orthogonal sequence is received, the AP determines the tth orthogonal sequence according to an order of the tth orthogonal sequence in the orthogonal sequence set. Corresponding kth MPDU.

S819. The AP confirms that the first STA correctly receives the kth MPDU.

Further, as shown in FIG. 11, after the AP performs the downlink resource allocation instruction on the m STAs by the AP, and after determining the second time slot corresponding to the first STA, the AP may further include:

In the first time slot:

S820. The AP receives a NACK frame replied by a STA of the m STAs.

S821. The AP performs cross-correlation operation with the NACK frame by using the qth orthogonal sequence to obtain a correlation peak, and determining, according to the correlation peak, whether to receive the inverse of the qth orthogonal sequence. Polar sequence.

S822. If the AP determines to receive the reverse polarity sequence of the qth orthogonal sequence, according to an order of the qth orthogonal sequence in the orthogonal sequence set, and the AP pair The m STAs perform sequence instruction of downlink resource allocation, and determine STAs corresponding to the qth orthogonal sequence.

S823. If the STA corresponding to the qth orthogonal sequence is the first STA, the AP confirms that the first STA does not correctly receive the first MPDU in the data sent by the AP to the STA. .

S824. If the STA corresponding to the qth orthogonal sequence is not the first STA, the AP confirms that the STA corresponding to the qth orthogonal sequence does not correctly receive data sent by the AP to the STA. .

And/or in the second time slot:

S825. The AP receives a kth NACK frame that is sent back by the first STA.

S826. The AP performs cross-correlation operation with the kth NACK frame by using a t-th orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, and And determining, according to the correlation peak, whether a reverse polarity sequence of the tth orthogonal sequence is received.

S827. If the AP determines to receive the reverse polarity sequence of the tth orthogonal sequence, the AP determines the first according to an order of the tth orthogonal sequence in the orthogonal sequence set. The kth MPDU corresponding to the t orthogonal sequences.

S828. The AP confirms that the first STA does not correctly receive the kth MPDU.

It should be noted that the corresponding indication signaling may be added to each of the m STAs in the signaling field of the preamble sent by the AP, to indicate that the AP is sent to the m. Whether each data in the STA's data is aggregated data. Further, the downlink resource allocation indications of the APs to the m STAs may be directly classified into two types to respectively indicate that each data in the data sent by the AP to the m STAs is aggregated data, Non-aggregated data. This embodiment of the present invention does not specifically limit this.

Optionally, in addition to the sequence indication that the AP performs downlink resource allocation on the m STAs, the signaling may further include whether each data in the data sent by the AP to the m STAs is First indication information of the aggregated data and second indication information of the number of MPDUs included in each of the aggregated data sent by the AP to the m STAs,

As shown in FIG. 12, in the embodiment of the present invention, after the AP sends signaling to the m stations STA, the method may further include:

S829. If the data that is sent by the AP to the first STA of the m STAs is aggregated data, the AP receives an ACK frame replied by a STA of the m STAs in the first time slot.

S830: The AP performs a cross-correlation operation with the ACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set, respectively, to obtain a correlation peak, and determining, according to the correlation peak, whether the first s orthogonal sequences.

Where s takes all the integer values between 1 and S, and S is determined by the AP according to the AP performing downlink resource allocation to the m STAs.

S831. If the AP determines that the sth orthogonal sequence is received, the AP sends the m to the m according to an order of the sth orthogonal sequence in the orthogonal sequence set. The number of MPDUs included in each aggregated data in the data of the STA and the sequence of downlink resource allocation by the AP to the m STAs are determined, and the STA corresponding to the sth orthogonal sequence is determined.

S832. If the STA corresponding to the sth orthogonal sequence is the first STA, the AP determines the sth according to an order of the sth orthogonal sequence in the orthogonal sequence set. The orthogonal sequence corresponds to the rth MPDU in the data sent by the AP to the first STA, and confirms that the first STA correctly receives the rth MPDU.

Where r is one or more integer values between 1 and R, and R is the number of MPDUs included in the data sent by the AP to the first STA.

S833. If the STA corresponding to the sth orthogonal sequence is not the first STA, the AP confirms that the STA corresponding to the sth orthogonal sequence correctly receives data sent by the AP to the STA.

Further, as shown in FIG. 13 , in the method for receiving and receiving the downlink data provided by the embodiment of the present invention, after the access point AP sends the signaling to the m station STAs, the method may further include:

S834. If the data that is sent by the AP to the first STA of the m STAs is aggregated data, the AP receives a NACK frame replied by a STA of the m STAs in the first time slot.

S835. The AP performs cross-correlation operation with the NACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines whether the first part is received according to the correlation peak. s orthogonal sequences.

S836. If the AP determines to receive the reverse polarity sequence of the sth orthogonal sequence, the AP is in the order of the s orthogonal sequence in the orthogonal sequence set, And determining, by the AP, the number of MPDUs included in each of the data of the m STAs, and the sequence indication of the downlink resources allocated by the AP to the m STAs, determining the sth The STA corresponding to the orthogonal sequence.

S837. If the STA corresponding to the sth orthogonal sequence is the first STA, the AP determines the sth according to an order of the sth orthogonal sequence in the orthogonal sequence set. The orthogonal sequence corresponds to the rth MPDU in the data sent by the AP to the first STA, and confirms that the first STA does not correctly receive the rth MPDU.

S838. If the STA corresponding to the sth orthogonal sequence is not the first STA, the AP confirms that the STA corresponding to the sth orthogonal sequence does not correctly receive the data sent by the AP to the STA. .

According to the method for receiving and confirming downlink data provided by the embodiment of the present invention, the STA may acquire an orthogonal sequence corresponding to the STA according to the signaling sent by the AP, and further generate a corresponding ACK frame according to the orthogonal sequence. Therefore, when there are multiple STAs in the downlink, each STA can simultaneously reply to the AP with an ACK frame (both in the first time slot). After receiving the ACK frame that multiple STAs reply at the same time, the AP can determine the corresponding STA according to the received ACK frame, and then determine that the STA correctly receives the data sent by the AP.

Embodiment 3

The embodiment of the present invention provides a method for receiving and confirming downlink data, which can be applied to the WLAN system shown in FIG.

S1401: The AP sends signaling to the m STAs.

Where m≥2, m is an integer.

S1402: The m STAs receive the signaling.

The signaling includes an order indication that the AP performs downlink resource allocation on the m STAs.

S1403: If the data sent by the AP to the m STAs is not aggregated data, the m STAs respectively obtain corresponding orthogonal sequences according to the signaling.

It is assumed that the n STAs of the m STAs correctly receive the data sent by the AP, and the remaining mn STAs do not correctly receive the data sent by the AP. For the sake of simplicity, only the operations of the n STAs are as follows. For example, the operation of the mn STAs is not described. For details, refer to the related description in the first embodiment.

S1404: The n STAs respectively generate corresponding ACK frames according to the acquired orthogonal sequence.

S1405. The n STAs send the ACK frame to the AP in a first time slot.

S1406: The AP receives an ACK frame replied by the n STAs in a first time slot.

S1407. The AP performs a cross-correlation operation with the ACK frame in the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines, according to the correlation peak, whether the first q orthogonal sequences.

Where q takes all integer values between 1 and m.

S1408. If the AP determines that the qth orthogonal sequence is received, the AP is in accordance with an order of the qth orthogonal sequence in the orthogonal sequence set, and the AP pairs the m The STA performs an order indication of the downlink resource allocation, and determines the STA corresponding to the qth orthogonal sequence.

S1409: The AP confirms that the STA corresponding to the qth orthogonal sequence correctly receives data sent by the AP to the STA.

Illustratively, a specific example of determining whether the downlink correctly received data using the method provided by the embodiment of the present invention is as follows:

It is assumed that the downlink m STAs are STA1, STA2, STA3, STA4, STA5, STA6, STA7, and STA8, respectively, and the AP transmits data to eight STAs by using OFDMA technology and MU-MIMO technology, and the AP performs 8 STAs. The sequence indication of the downlink resource allocation is specifically: using MU-MIMO technology to transmit data to STA2, STA5, STA8, and STA6 on the first resource block; transmitting data to STA1 on the second resource block; and in the third resource block. The data is sent to the STA3; the MU-MIMO technology is used to send data to the STA4 and the STA7 on the first resource block; and the data sent to the 8 STAs is not aggregated data.

The S1 and the AP send signaling to the eight STAs, where the signaling includes an order indication that the AP performs downlink resource allocation on the eight STAs.

The S2 and the 8 STAs receive the signaling sent by the AP, and obtain the corresponding orthogonal sequence according to the sequence indication of the downlink resource allocation of the 8 STAs.

After receiving the signaling sent by the AP, each STA can learn that the AP performs downlink resource allocation for the eight STAs according to the signaling: STA2→STA5→STA8→STA6→STA1→STA3→STA4→STA7.

Taking STA1 as an example, the process of acquiring an orthogonal sequence in the order in which the STAs perform downlink resource allocation to the eight STAs according to the foregoing APs is described as follows: the data sent by the AP to the STA1 is not aggregated data, and the STA1 is in the AP to the eight STAs. The fifth sequence of downlink resource allocation is performed, so STA1 acquires the fifth orthogonal sequence from the pre-stored orthogonal sequence set as the orthogonal sequence corresponding thereto.

After each STA obtains the corresponding orthogonal sequence, the correspondence between each STA and the orthogonal sequence is as shown in Table-1, where Seq1 represents the first orthogonal sequence in the orthogonal sequence set, and Seq2 represents the orthogonal sequence set. The second orthogonal sequence, ... and so on.

Table 1

S3. Each STA that correctly receives data generates a corresponding ACK frame according to the acquired orthogonal sequence, and sends an ACK frame to the AP in the first time slot.

Here, it is assumed that only STA1 and STA5 of the 8 STAs correctly receive data. Then, STA1 generates a corresponding ACK frame according to Seq5, and STA5 generates a corresponding ACK frame according to Seq2, and both STA1 and STA5 transmit respective ACK frames to the AP in the first time slot.

S4. The AP receives the ACK frame in the first time slot, and performs cross-correlation operation with the received ACK frame using each orthogonal sequence in the pre-stored orthogonal sequence set, respectively, to determine that Seq2 and Seq5 are received.

S5. The AP determines the STAs corresponding to Seq2 and Seq5 according to the order of Seq2 and Seq5 in the orthogonal sequence set and the sequence indication of the downlink resource allocation by the AP to the eight STAs.

Seq2 is taken as an example. Since Seq2 is the second sequence in the orthogonal sequence set, and according to the sequence indication of the downlink resource allocation of the 8 STAs by the AP, it can be seen that the STA corresponding to the second sequence is STA5, that is, Seq2. The corresponding STA is STA5.

Similarly, it can be known that the STA corresponding to Seq5 is STA1.

S6. The AP confirms that STA5 corresponding to Seq2 and STA1 corresponding to Seq5 correctly receive data.

At this point, the AP has completed confirmation of whether the downlink correctly receives data.

Further, the signaling sent by the AP to the m STAs may include the sequence indication of the downlink resource allocation by the AP to the m STAs, and may also include the AP sending the information to the m STAs. Whether each data in the data is the first indication of the aggregated data,

Then, as shown in FIG. 15, after step S1402, the method may further include:

S1410: The m STAs determine, according to the first indication information, whether the data sent by the AP is aggregated data.

S1411: If the data sent by the AP to the first STA of the m STAs is Aggregating data, the first STA sequentially receives p MPDUs in data sent by the AP to the first STA.

Where p is the number of MPDUs included in the data sent by the AP to the STA.

S1412: The first STA obtains a first orthogonal sequence corresponding to the first MPDU from the pre-stored orthogonal sequence set according to an order indication that the AP performs downlink resource allocation on the m STAs.

S1413: The first STA acquires an ith corresponding to the i-th MPDU from the pre-stored orthogonal sequence set according to an order of an i-th MPDU in data sent by the AP to the STA. Orthogonal sequence.

Where i takes all integer values between 2 and p.

S1414. If the first STA correctly receives the first MPDU, the first STA generates a corresponding ACK frame according to the first orthogonal sequence.

S1415: If the first STA correctly receives the i-th MPDU, the first STA generates a corresponding i-th ACK frame according to the ith orthogonal sequence.

S1416. The first STA sends the ACK frame to the AP in a first time slot.

S1417: If the data sent by the AP to the second STA of the m STAs is not aggregated data, the second STA obtains a corresponding positive according to the sequence indication of the downlink resource allocation of the m STAs by the AP. Cross sequence.

S1418: If the second STA correctly receives data sent by the AP to the second STA, the second STA generates a corresponding ACK frame according to the acquired orthogonal sequence.

S1419: The second STA sends the ACK frame to the AP in the first time slot.

S1420: The AP receives an ACK frame replied by a STA of the m STAs in the first time slot.

S1421: The AP performs cross-correlation operation with the ACK frame by using the qth orthogonal sequence in the pre-stored orthogonal sequence set, respectively, to obtain a correlation peak, and determining, according to the correlation peak, whether the first q orthogonal sequences.

Where q takes all integer values between 1 and m.

S1422: If the AP determines that the qth orthogonal sequence is received, the AP is in accordance with an order of the qth orthogonal sequence in the orthogonal sequence set, and the AP pairs the m The STA performs an order indication of the downlink resource allocation, and determines the STA corresponding to the qth orthogonal sequence.

S1423. If the STA corresponding to the qth orthogonal sequence is the first STA, the AP confirms that the first STA correctly receives the first MPDU, and if the qth orthogonal The STA corresponding to the sequence is the second STA, and the AP confirms that the second STA correctly receives data sent by the AP to the second STA.

S1424. The first STA sends the ith ACK frame to the AP in a second time slot.

The second time slot is determined by the first STA according to an order indication that the AP performs downlink resource allocation to the m STAs.

S1425: The AP determines, according to an order indication, that the AP performs downlink resource allocation on the m STAs, and determines a second time slot corresponding to the first STA.

S1426. The AP receives the kth ACK frame replied by the first STA in a second time slot.

S1427: The AP performs a cross-correlation operation with the kth ACK frame in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines whether the received peak is received according to the correlation peak. The tth orthogonal sequence is described.

S1428. If the AP determines that the t-th orthogonal sequence is received, the AP determines the t-th orthogonal sequence according to an order of the t-th orthogonal sequence in the orthogonal sequence set. Corresponding kth MPDU.

S1429. The AP confirms that the first STA correctly receives the kth MPDU.

Exemplarily, in combination with the foregoing implementation steps of the embodiment of the present invention, a specific example of determining whether the downlink correctly receives data is as follows:

It is assumed that the downlink m STAs are STA1, STA2, STA3, STA4, STA5, STA6, STA7, and STA88 STAs, and the AP uses OFDMA technology and MU-MIMO technology to transmit data to eight STAs, and the AP performs downlink on eight STAs. The order of the resource allocation is specifically: the MU-MIMO technology is used to send data to STA2, STA5, STA8, and STA6 in the first resource block, and only the data sent to STA2 is aggregated data (including 16 MPDUs); Data is sent to STA1 on the resource block, and the data sent to the STA is aggregated data (including 28 MPDUs); the data is sent to STA3 on the third resource block, and the data sent to STA3 is not aggregated data; The MU-MIMO technology is used to transmit data to STA4 and STA7, and the data sent to STA4 and STA7 are not aggregated data.

It should be noted that the present example is only described by the example that the STA correctly receives the data sent by the AP. For the case that the STA does not correctly receive the data sent by the AP, reference may be made to the first and second embodiments of the present invention. Related descriptions are not described here.

The S1 and the AP send signaling to the eight STAs, where the signaling includes the sequence indication of the downlink resource allocation by the AP to the eight STAs, and the first indication information of whether each data in the data sent by the AP to the eight STAs is aggregated data. .

For STA3-STA8, since the data sent by the AP to the STA3-STA8 is not aggregated data, the STA3-STA8 method for obtaining the orthogonal sequence may refer to the related description in the previous example, and details are not described herein again.

For STA1 and STA2, the data sent by the AP to STA1 and STA2 is aggregated data, so the process of STA1 and STA2 acquiring the orthogonal sequence and STA3-STA8 have The difference. Take STA2 as an example:

(1) The STA2 receives the MPDUs in the data sent by the AP to the STA2 in sequence, and the number of the MPDUs is 16.

(2) STA2 obtains Seq1 from the pre-stored orthogonal sequence set as the first positive corresponding to the first MPDU according to the sequence indication of the downlink resource allocation by the AP to the eight STAs (STA2 is the first one). Cross sequence.

(3) STA2 acquires an orthogonal sequence corresponding to each MPDU in the second MPDU-16th MPDU from the pre-stored orthogonal sequence set according to the order of the second MPDU-16th MPDU. For example, for the second MPDU, Seq1 is acquired as the orthogonal sequence corresponding thereto; for the third MPDU, Seq2 is acquired as the orthogonal sequence corresponding thereto; and so on.

After each STA acquires the corresponding orthogonal sequence, the correspondence between each STA and the orthogonal sequence is as shown in Table-2.

Table 2

S3. Each STA that correctly receives data generates a corresponding ACK frame according to the acquired orthogonal sequence, and sends an ACK frame to the AP.

Here, it is assumed that STA3 correctly receives the data sent by the AP to the STA3, and STA2 correctly receives the first MPDU and the fourth MPDU. Then, STA3 generates a corresponding ACK frame according to the acquired orthogonal sequence, and sends the generated ACK frame to the AP in the first time slot. STA2 generates a corresponding ACK frame according to Seq1 corresponding to the first MPDU, and sends an ACK frame in the first time slot; meanwhile, according to the fourth MPDU Corresponding Seq3 generates a corresponding third ACK frame, and according to the sequence indication of the downlink resource allocation of the eight STAs by the AP, it can be known that the second time slot corresponding to STA2 is the first time slot after the first time slot, and in the second time The slot sends a third ACK frame to the AP.

S4. The AP receives the ACK frame in the first time slot, and performs a cross-correlation operation with the received ACK frame using each orthogonal sequence in the pre-stored orthogonal sequence set to determine whether the orthogonal sequence is received.

In the next step, it is assumed that STA3 correctly receives the data sent by the AP, and STA2 correctly receives the first MPDU and the fourth MPDU, and the AP can receive the ACK frame replied by STA3 and the ACK replied by STA2 in the first time slot. frame. The AP uses each orthogonal sequence in the orthogonal sequence set to perform a cross-correlation operation with the received ACK frame, and according to the correlation peak and the preset threshold, it can be determined that Seq1 and Seq6 in the orthogonal sequence set are received.

S5. The AP determines the STAs corresponding to Seq1 and Seq6 as STA3 and STA2 according to the order of Seq1 and Seq6 in the orthogonal sequence set and the sequence indication of the downlink resource allocation by the AP to the eight STAs.

S6. The AP confirms that STA3 correctly receives the data sent by the AP to STA3, and STA2 correctly receives the first MPDU and the fourth MPDU.

S7. The AP receives the third ACK frame replied by STA2 in the second time slot, and performs cross-correlation operation with each received third ACK frame using each orthogonal sequence in the pre-stored orthogonal sequence set, according to the correlation peak. And a preset threshold, which can determine that Seq3 is received in the orthogonal sequence set.

S8. The AP determines, according to the sequence of Seq3 in the orthogonal sequence set, that Seq3 corresponds to the fourth MPDU.

S9. The AP confirms that the first STA correctly receives the fourth MPDU.

Optionally, the signaling sent by the AP to the m STAs may include the AP sending the m STAs to the m STAs, in addition to the sequence indication that the APs perform downlink resource allocation for the m STAs. Whether each data in the data is the first indication information of the aggregated data and the second indication letter of the number of MPDUs included in each aggregated data interest,

Then, as shown in FIG. 16, after step S1402, the method may further include:

S1430: The m STAs determine, according to the first indication information, whether data sent by the AP to the m STAs is aggregated data.

S1431: If the data that is sent by the AP to the first STA of the m STAs is aggregated data, the first STA performs an indication of the downlink resource allocation of the m STAs according to the AP, and the a second indication message, and an order of the jth MPDU in the data sent by the AP to the STA, acquiring a jth orthogonal sequence corresponding to the jth MPDU from the pre-stored orthogonal sequence set .

Where j takes all integer values between 1 and p.

S1432: If the first STA correctly receives the jth MPDU, the first STA generates a corresponding ACK frame according to the jth orthogonal sequence.

S1433: The first STA sends the first ACK frame to the AP in the first time slot.

S1434. If the data that is sent by the AP to the second STA of the m STAs is not aggregated data, the second STA obtains a corresponding positive according to the sequence indication of the downlink resource allocation of the m STAs by the AP. Cross sequence.

S1435: If the second STA correctly receives the data sent by the AP to the second STA, the second STA generates a corresponding ACK frame according to the acquired orthogonal sequence.

S1436: The second STA sends the ACK frame to the AP in the first time slot.

S1437: The AP receives an ACK frame returned by a STA of the m STAs in the first time slot.

S1438. The AP performs cross-correlation operation with the ACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set, respectively, to obtain a correlation peak, and determining, according to the correlation peak, whether the first s orthogonal sequences.

S1439. If the AP determines that the sth orthogonal sequence is received, the AP sends the m to the m according to an order of the sth orthogonal sequence in the orthogonal sequence set. The number of MPDUs included in each aggregated data in the data of the STA and the sequence of downlink resource allocation by the AP to the m STAs are determined, and the STA corresponding to the sth orthogonal sequence is determined.

S1440. If the STA corresponding to the sth orthogonal sequence is the first STA, the AP determines the sth according to an order of the sth orthogonal sequence in the orthogonal sequence set. The r th MPDU corresponding to the orthogonal sequence confirms that the first STA correctly receives the r th MPDU.

S1441: If the STA corresponding to the sth orthogonal sequence is the second STA, the AP confirms that the second STA corresponding to the sth orthogonal sequence correctly receives the AP and sends the The data of the second STA.

Exemplarily, in combination with the foregoing implementation steps of the embodiment of the present invention, a specific example of determining whether the downlink correctly receives data is as follows (the application scenario is the same as the previous example). It should be noted that the present example is only described by the example that the STA correctly receives the data sent by the AP. For the case that the STA does not correctly receive the data sent by the AP, refer to the first embodiment and the second embodiment of the present invention. The related descriptions are not repeated here.

The S1 and the AP send signaling to the eight STAs, where the signaling includes an indication of the sequence of the downlink resource allocation by the AP to the eight STAs, and an indication of whether each of the data sent by the AP to the eight STAs is aggregated data and each The indication information of the number of MPDUs included in the aggregated data.

The S2 and the 8 STAs receive the signaling sent by the AP, and indicate, according to the order in which the AP performs downlink resource allocation on the eight STAs, and whether each data in the data sent by the AP to the eight STAs is the indication information of the aggregated data, and each The indication information of the number of MPDUs included in the aggregated data acquires a corresponding orthogonal sequence.

After receiving the signaling sent by the AP, each STA can learn the AP pair according to the signaling. The order in which the STAs perform downlink resource allocation is: STA2→STA5→STA8→STA6→STA1→STA3→STA4→STA7.

STA1 is taken as an example for description: STA1 is the fifth of the order in which the AP performs downlink resource allocation for eight STAs. For the first four STAs, STAs, STAs, STAs, and STAs of STA1, according to the indication information in the signaling, only the data sent to the STA2 is aggregated data, and 16 MPDUs are included. Since the data received by STA1 contains 28 MPDUs, STA1 should acquire 28 orthogonal sequences starting from Seq20 from the orthogonal sequence set.

After each STA acquires the corresponding orthogonal sequence, the correspondence between each STA and the orthogonal sequence is as shown in Table-3.

table 3

Here, it is assumed that STA5 of the eight STAs correctly receives the data sent by the AP to the STA5, and the STA1 correctly receives the 27th MPDU of the data sent by the AP to the STA5. Then, STA5 generates a corresponding ACK frame according to Seq17, and STA1 generates a corresponding ACK frame according to Seq46 corresponding to the 27th MPDU, and both STA1 and STA5 send respective ACK frames to the AP in the first time slot.

S4. The AP receives the ACK frame in the first time slot, and performs a cross-correlation operation with the received ACK frame using each orthogonal sequence in the pre-stored orthogonal sequence set, respectively, to determine that Seq17 and Seq46 are received.

S5. The sequence of the Seq17 and Seq46 in the orthogonal sequence set, the sequence indication of the downlink resource allocation by the AP to the eight STAs, and the number of MPDUs included in each aggregated data of the data sent by the AP to the eight STAs. It is determined that the STA corresponding to Seq17 is STA5, and the STA corresponding to Seq46 is STA1.

S6. The AP determines, according to the sequence of Seq46 in the orthogonal sequence set, that Seq46 corresponds to the 27th MPDU.

S7: The AP confirms that the STA5 correctly receives the data sent by the AP to the STA5, and the STA1 correctly receives the 27th MPDU in the data sent by the AP to the STA5.

In addition, it should be noted that those skilled in the art can easily understand that in the method for receiving and confirming downlink data provided by the embodiment of the present invention, how many methods are used for the STA to obtain the corresponding orthogonal sequence from the preset orthogonal sequence set. For example, as described in the embodiment of the present invention, the first orthogonal sequence is sequentially obtained in order, and may also be sequentially acquired according to a certain rule (such as a certain number of orthogonal sequences at a time). This embodiment of the present invention does not specifically limit this.

It is easy to understand that the STA obtains an orthogonal sequence differently, and the obtained orthogonal sequence also differs. Furthermore, when the AP determines the STA or MPDU corresponding to the orthogonal sequence, the result will be different. Therefore, the STA side and the AP should agree on the acquisition method in advance. The STA side obtains the orthogonal sequence according to the agreed method, and the AP needs to acquire the orthogonal sequence by combining the STA side. The method of the column determines the corresponding STA or MPDU.

Embodiment 4

The embodiment of the present invention provides a STA 170, as shown in FIG. 17, comprising: a first receiving unit 1701, a first obtaining unit 1702, a first generating unit 1703, and a first sending unit 1704;

The first receiving unit 1701 is configured to receive signaling sent by an access point AP, where the signaling is signaling that is sent by the AP to m STAs, where the m STAs include the STA, m≥2, m is an integer;

The first obtaining unit 1702 is configured to acquire, according to the signaling, an orthogonal sequence corresponding to the STA, if the data that is sent by the AP to the STA is not aggregated data;

The first generating unit 1703 is configured to generate, according to the orthogonal sequence, a corresponding ACK frame, if the STA correctly receives data sent by the AP to the STA;

The first sending unit 1704 is configured to send the foregoing to the AP in a first time slot. ACK frame.

Preferably, the STA may further include: a second generating unit and a second sending unit;

The second generating unit is configured to: after the first obtaining unit 1702 acquires an orthogonal sequence corresponding to the STA according to the signaling, if the STA does not correctly receive the AP and sends the information to the STA Generating data of the STA, generating a corresponding NACK frame according to the reverse polarity sequence of the orthogonal sequence;

The second sending unit is configured to send the NACK frame to the AP in the first time slot.

Preferably, the signaling includes an order indication that the AP performs downlink resource allocation on the m STAs, and the first acquiring unit 1702 is specifically configured to perform, according to the AP, the m STAs. The sequence of the downlink resource allocation indicates that the orthogonal sequence corresponding to the STA is obtained.

Specifically, the first generating unit 1703 may be specifically configured to:

Generating, by using the orthogonal sequence as a sequence field, a corresponding ACK frame, where the sequence field includes one orthogonal frequency division multiplexing OFDM symbol;

Generating, by using the orthogonal sequence as a sequence field, a short training field, to generate a corresponding ACK frame, where the sequence field includes one OFDM symbol;

Preferably, the first generating unit 1703 is further specifically configured to:

Generating, by using the reverse polarity sequence of the orthogonal sequence as a sequence field, a corresponding NACK frame, where the sequence field includes one OFDM symbol;

The reverse polarity sequence of the orthogonal sequence is used as a sequence field, and a short training field is combined to generate a corresponding NACK frame, where the sequence field includes one OFDM symbol.

Preferably, the STA may further include: a first determining unit, a second receiving unit, a second acquiring unit, a second generating unit, and a second sending unit.

The signaling may further include whether the data sent by the AP to the m STAs is the first indication information of the aggregated data.

The first determining unit is configured to determine, after the first receiving unit 1701 receives the signaling sent by the access point AP, whether the data sent by the AP to the STA 110 is aggregated according to the first indication information. data.

After the first receiving unit 1701 receives the signaling sent by the access point AP, determining, according to the first indication information, whether the data sent by the AP to the STA is aggregated data;

The second receiving unit is configured to: if the data sent by the AP to the STA is aggregated data, sequentially receive p media access control MAC layer protocol data units MPDU sent by the AP to the STA, where p is Describe the number of MPDUs included in data sent by the AP to the STA;

The first obtaining unit 1702 is further configured to: obtain, according to the sequence indication of the downlink resource allocation by the AP to the m STAs, the first orthogonality corresponding to the first MPDU from the pre-stored orthogonal sequence set. sequence;

The second acquiring unit, configured to acquire, according to an order of the i-th MPDU in the data that is sent by the AP to the STA, from the pre-stored orthogonal sequence set, corresponding to the i-th MPDU An i-th orthogonal sequence, wherein i takes all integer values between 2 and p;

The first generating unit 1703 is further configured to: if the second receiving unit correctly receives the first MPDU, generate a corresponding ACK frame according to the first orthogonal sequence;

The second generating unit is configured to generate a corresponding i-th ACK frame according to the ith orthogonal sequence, if the second receiving unit correctly receives the i-th MPDU;

The second sending unit is configured to send the ith ACK frame to the AP in a second time slot, where the second time slot is that the second sending unit is configured to the m according to the AP The sequence indication of the downlink resource allocation by the STA is determined.

Preferably, in the STA provided by the embodiment of the present invention, the first generating unit 1703 is further configured to:

Obtaining, by the second acquiring unit, an ith corresponding to the i-th MPDU from the pre-stored orthogonal sequence set in an order according to an ith MPDU in data sent by the AP to the STA After the orthogonal sequence, if the second receiving unit does not correctly receive the first MPDU, generates a corresponding NACK frame according to the reverse polarity sequence of the first orthogonal sequence;

The first sending unit 1704 is further configured to send the NACK frame to the AP in the first time slot;

The second generating unit is further configured to: if the second receiving unit does not correctly receive the ith MPDU, generate a corresponding i-th NACK frame according to the ith orthogonal sequence;

The second sending unit is further configured to send the ith NACK frame to the AP in the second time slot.

Optionally, the STA may further include: a second determining unit, a third acquiring unit, and a third generating unit.

The signaling may further include whether the data sent by the AP to the m STAs is first indication information of the aggregated data, and the number of MPDUs included in each aggregated data. The second indication.

The second determining unit is configured to determine, after the first receiving unit 1701 receives the signaling sent by the access point AP, whether the data sent by the AP to the STA is aggregated according to the first indication information. data;

The third acquiring unit is configured to: if the data sent by the AP to the STA is aggregated data, perform an order indication of downlink resource allocation by the AP to the m STAs, where each aggregated data is included The indication information of the number of MPDUs and the sequence of the jth MPDU in the data sent by the AP to the STA, and acquiring, corresponding to the jth MPDU, from the pre-stored orthogonal sequence set a j-orthogonal sequence, wherein j takes all integer values between 1 and p;

The third generating unit is configured to generate a corresponding ACK frame according to the jth orthogonal sequence, if the STA correctly receives the jth MPDU.

Preferably, the third generating unit is further configured to:

And the third obtaining unit, according to the sequence indication of the downlink resource allocation by the AP to the m STAs, the second indication information, and the jth MPDU in the data sent by the AP to the STA Sequence, after obtaining the j-th orthogonal sequence corresponding to the j-th MPDU from the pre-stored orthogonal sequence set, if the STA does not correctly receive the j-th MPDU, according to the j-th Orthogonal sequence The polarity sequence generates a corresponding NACK frame and transmits the NACK frame to the AP in the first time slot.

For example, the method for performing the receiving and confirming of the downlink data by using the STA provided by the embodiment of the present invention may refer to the description of the first embodiment, and details are not described herein again.

According to the STA provided by the embodiment of the present invention, the STA may obtain an orthogonal sequence corresponding to the STA according to the signaling sent by the AP, and then generate a corresponding ACK frame according to the orthogonal sequence. Therefore, when there are multiple STAs in the downlink, each STA can simultaneously reply to the AP with an ACK frame (both in the first time slot). After receiving the ACK frame that multiple STAs reply at the same time, the AP can determine the corresponding STAs according to the received ACK frame, and further determine that the STAs have received the data sent by the AP.

On the one hand, according to the STA provided by the embodiment of the present invention, since each STA can simultaneously reply to the AP with a corresponding ACK frame, instead of separately replying the ACK frame to the AP in sequence, as in the prior art, the system resources can be reduced. Occupy. On the other hand, compared with the ACK frame in the prior art, the ACK frame generated by the OFDM frame according to the obtained orthogonal sequence is small, so the system resources occupied by transmitting the ACK frame are relatively small.

In summary, the STA provided by the embodiment of the present invention can reduce the occupation of system resources, thereby improving the system throughput rate.

Embodiment 5

An embodiment of the present invention provides an AP, as shown in FIG. 18, including: a sending unit 1801, a first receiving unit 1802, a first calculating unit 1803, a first determining unit 1804, a second determining unit 1805, and a first confirmation. Unit 1806.

The sending unit 1801 is configured to send signaling to the m stations STA, where m≥2, where m is an integer;

The first receiving unit 1802 is configured to: if the data sent by the AP to the m STAs does not include aggregated data, receive an ACK frame returned by the STA of the m STAs in the first time slot;

The first calculating unit 1803 is configured to perform cross-correlation operation with the ACK frame by using the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak. a value, where q takes all integer values between 1 and m;

The first determining unit 1804 is configured to determine, according to the correlation peak, whether the qth orthogonal sequence is received;

The second determining unit 1805 is configured to determine, if the first determining unit 1804 receives the qth orthogonal sequence, the STA corresponding to the qth orthogonal sequence;

The first confirming unit 1806 is configured to confirm that the STA corresponding to the qth orthogonal sequence correctly receives data sent by the AP to the STA.

Preferably, in the AP provided by the embodiment of the present invention, the first receiving unit 1802 is further configured to:

After the sending unit 1801 sends signaling to the m station STAs, if the data sent by the AP to the m STAs does not include aggregated data, the STAs in the m STAs are received in the first time slot. NACK frame;

The first determining unit 1804 is further configured to determine, according to the correlation peak, whether a reverse polarity sequence of the qth orthogonal sequence is received;

The second determining unit 1805 is further configured to: if the first determining unit 1804 determines that the reverse polarity sequence of the qth orthogonal sequence is received, determine the STA corresponding to the qth orthogonal sequence;

The first confirming unit 1806 is further configured to confirm that the STA corresponding to the qth orthogonal sequence does not correctly receive data sent by the AP to the STA.

Preferably, the signaling includes an order indication that the AP performs downlink resource allocation on the m STAs, and the second determining unit 1805 is specifically configured to:

Determining the STA corresponding to the qth orthogonal sequence according to an order of the qth orthogonal sequence in the orthogonal sequence set and an order indication of the downlink resource allocation by the AP to the m STAs .

Preferably, the AP may further include: a third determining unit, a second receiving unit, a second calculating unit, a fourth determining unit, a fifth determining unit, and a second confirming unit;

The signaling further includes whether the data sent by the AP to the m STAs is first indication information of the aggregated data;

The third determining unit is configured to send signaling to the sending unit 1801 to the m After the STAs of the STAs, if the data sent by the AP to the first STA of the m STAs is aggregated data, the first STA is determined according to the sequence indication of the downlink resource allocation by the AP to the m STAs. Corresponding second time slot;

In the first time slot:

The second receiving unit is configured to receive an ACK frame that is returned by a STA of the m STAs;

The second calculating unit is configured to perform a cross-correlation operation with the ACK frame by using the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, where q is between 1 and m All integer values;

The fourth determining unit is configured to determine, according to the correlation peak, whether the qth orthogonal sequence is received;

The fifth determining unit is configured to: if the fourth determining unit determines that the qth orthogonal sequence is received, according to an order of the qth orthogonal sequence in the orthogonal sequence set, and Determining, by the AP, a sequence indication of downlink resource allocation to the m STAs, and determining STAs corresponding to the qth orthogonal sequence;

The second confirming unit is configured to: if the STA corresponding to the qth orthogonal sequence is the first STA, confirm that the first STA correctly receives the data sent by the AP to the STA 1 MPDU;

The second acknowledgment unit is further configured to: if the STA corresponding to the qth orthogonal sequence is not the first STA, confirm that the STA corresponding to the qth orthogonal sequence correctly receives the AP sent to the STA The data of the STA;

And/or in the second time slot:

The second receiving unit is further configured to receive a k-th ACK frame that is sent by the first STA, where k is one or more integer values between 2 and K, and K is sent by the AP to the The number of MPDUs included in the data of one STA;

The second calculating unit is further configured to perform a cross-correlation operation with the kth ACK frame in the pre-stored orthogonal sequence set to obtain a correlation peak, where t takes 1 to T All the integer values between the two are determined by the AP according to the downlink resource allocation of the m STAs by the AP;

The fourth determining unit is further configured to determine, according to the correlation peak, whether the t-th orthogonal sequence is received;

The fifth determining unit is further configured to: if the fourth determining unit determines that the tth orthogonal sequence is received, determine according to an order of the tth orthogonal sequence in the orthogonal sequence set The kth MPDU corresponding to the tth orthogonal sequence;

The second confirming unit is further configured to confirm that the first STA correctly receives the kth MPDU.

Preferably, in the first time slot:

The second receiving unit is further configured to: after the AP performs the downlink resource allocation instruction on the m STAs by the AP, determine the second time slot corresponding to the first STA, and receive the m NACK frames replied by STAs in STAs;

The fourth determining unit is further configured to determine, according to the correlation peak, whether a reverse polarity sequence of the qth orthogonal sequence is received;

The fifth determining unit is further configured to: if the fourth determining unit determines to receive the reverse polarity sequence of the qth orthogonal sequence, according to the qth orthogonal sequence in the orthogonal sequence set The sequence of the sequence, and the sequence indication of the downlink resource allocation by the AP to the m STAs, determining the STA corresponding to the qth orthogonal sequence;

The second confirming unit is further configured to: if the STA corresponding to the qth orthogonal sequence is the first STA, confirm that the first STA does not correctly receive data sent by the AP to the STA The first MPDU;

The second acknowledgment unit is further configured to: if the STA corresponding to the qth orthogonal sequence is not the first STA, confirm that the STA corresponding to the qth orthogonal sequence does not correctly receive the AP and send the The data of the STA;

And/or in the second time slot:

The second receiving unit is further configured to receive a kth NACK frame that is sent by the first STA, where k is one or more integer values between 2 and K, and K is sent by the AP to the The number of MPDUs included in the data of one STA;

The fourth determining unit is further configured to determine, according to the correlation peak, whether a reverse polarity sequence of the tth orthogonal sequence is received, where t takes all of 1 to T An integer value, where T is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

The fifth determining unit is further configured to: if the fourth determining unit determines to receive the reverse polarity sequence of the tth orthogonal sequence, according to the tth orthogonal sequence in the orthogonal sequence set a sequence in which the kth MPDU corresponding to the tth orthogonal sequence is determined;

The second confirming unit is further configured to confirm that the first STA does not correctly receive the kth MPDU.

Optionally, the AP may further include: a third receiving unit, a third calculating unit, a sixth determining unit, a seventh determining unit, and a third confirming unit;

The signaling further includes: first information indicating whether each of the data sent by the AP to the m STAs is aggregated data, and data sent by the AP to the m STAs Second indication information of the number of MPDUs included in each aggregated data;

The third receiving unit is configured to: after the access point AP sends signaling to the m station STAs, if the data sent by the AP to the first STA of the m STAs is aggregated data, Receiving, by the first time slot, an ACK frame replied by a STA of the m STAs;

The third calculating unit is configured to perform a cross-correlation operation with the ACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, where s takes a value between 1 and S All the integer values, S is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

The sixth determining unit is configured to determine, according to the correlation peak, whether the sth orthogonal sequence is received;

The seventh determining unit is configured to: if the sixth determining unit determines that the sth orthogonal sequence is received, according to an order of the sth orthogonal sequence in the orthogonal sequence set, The number of MPDUs included in each of the data sent by the AP to the m STAs, and the sequence indication of the downlink resources allocated by the AP to the m STAs, to determine the sth orthogonal The STA corresponding to the sequence;

The seventh determining unit is further configured to: if the STA corresponding to the sth orthogonal sequence Determining, by the first STA, data that is sent by the AP corresponding to the sth orthogonal sequence to the first STA according to an order of the sth orthogonal sequence in the orthogonal sequence set The rth MPDU in the r; wherein r is one or more integer values between 1 and R, and R is the number of MPDUs included in the data sent by the AP to the first STA;

The third confirming unit is configured to confirm that the first STA correctly receives the rth MPDU.

Preferably, in the AP provided by the embodiment of the present invention, the third receiving unit is further configured to:

After the sending unit 1801 sends signaling to the m station STAs, if the data sent by the AP to the first STA of the m STAs is aggregated data, the m STAs are received in the first time slot. The NACK frame replied by the STA in the middle;

The third calculating unit is further configured to perform a cross-correlation operation with the NACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak;

The sixth determining unit is further configured to determine, according to the correlation peak, whether the sth orthogonal sequence is received, where s takes all integer values between 1 and S, and S is the AP according to the Determining, by the AP, the downlink resource allocation of the m STAs;

The seventh determining unit is further configured to: if the sixth determining unit determines to receive the reverse polarity sequence of the sth orthogonal sequence, according to the sth orthogonal sequence in the orthogonal sequence set The order of the medium, the number of MPDUs included in each of the data sent by the AP to the m STAs, and the sequence indication of the downlink resource allocation by the AP to the m STAs, determining Said STA corresponding to the sth orthogonal sequence;

The seventh determining unit is further configured to: if the STA corresponding to the sth orthogonal sequence is the first STA, determine according to an order of the sth orthogonal sequence in the orthogonal sequence set The sth orthogonal sequence corresponds to the rth MPDU in the data sent by the AP to the first STA; where r takes one or more integers between 1 and R a value, where R is the number of MPDUs included in data sent by the AP to the first STA;

The third confirming unit is further configured to confirm that the first STA does not correctly receive the rth MPDU;

The third acknowledgment unit is further configured to: if the STA corresponding to the sth orthogonal sequence is not the first STA, confirm that the STA corresponding to the sth orthogonal sequence does not correctly receive the AP and send the The data of the STA.

Specifically, the method for performing the acknowledgment of the acknowledgment of the downlink data by using the AP provided by the embodiment of the present invention may be referred to the description of the second embodiment.

According to the AP provided by the embodiment of the present invention, each STA may acquire a corresponding orthogonal sequence according to the signaling sent by the AP, and then generate a corresponding ACK frame according to the orthogonal sequence. Therefore, when there are multiple STAs in the downlink, each STA can simultaneously reply to the AP with an ACK frame (both in the first time slot). After receiving the ACK frame that multiple STAs reply at the same time, the AP can determine the corresponding STA according to the received ACK frame, and then determine that the STA correctly receives the data sent by the AP.

On the one hand, the APs provided by the embodiments of the present invention can reduce the system resources to the APs because the STAs can reply the APs with the ACK frames at the same time, instead of replying the ACK frames to the APs in the order of the prior art. Occupy. On the other hand, compared with the ACK frame in the prior art, the ACK frame generated by the OFDM frame according to the obtained orthogonal sequence is small, so the system resources occupied by transmitting the ACK frame are relatively small.

In summary, the AP provided by the embodiment of the present invention can reduce the occupation of system resources, thereby improving system throughput.

Embodiment 6

An embodiment of the present invention provides a STA, as shown in FIG. 19, including: a receiver 1901, a processor 1902, and a transmitter 1903.

The receiver 1901 is configured to receive signaling sent by an access point AP, where the signaling is signaling that is sent by the AP to the downlink m STAs, where the m STAs include the STA , m≥2, m is an integer;

The processor 1902 is configured to:

The transmitter 1903 is configured to send the ACK frame to the AP in a first time slot.

Preferably, the processor 1902 is further configured to:

After acquiring the orthogonal sequence corresponding to the STA according to the signaling, if the STA does not correctly receive the data sent by the AP to the STA, generate according to the reverse polarity sequence of the orthogonal sequence. Corresponding NACK frame;

The transmitter 1903 is further configured to send the NACK frame to the AP in the first time slot.

Specifically, the signaling includes an order indication that the AP performs downlink resource allocation on the m STAs;

The processor 1902 is specifically configured to obtain an orthogonal sequence corresponding to the STA according to an order indication that the AP performs downlink resource allocation on the m STAs.

Preferably, the signaling further includes whether the data sent by the AP to the m STAs is first indication information of the aggregated data;

The processor 1902 is configured to determine, according to the first indication information, whether the data sent by the AP to the STA is aggregated data, after the receiver 1901 receives the signaling sent by the access point AP;

The receiver 1901 is configured to: if the data sent by the AP to the STA is aggregated data, sequentially receive p media access control MAC layer protocol data units MPDU sent by the AP to the STA, where p is The number of MPDUs included in the data sent by the AP to the STA;

The processor 1902 is further configured to: obtain, according to the sequence indication of the downlink resource allocation by the AP to the m STAs, the first orthogonal sequence corresponding to the first MPDU from the pre-stored orthogonal sequence set;

The processor 1902 is configured to send to the AP according to the ith MPDU. Obtaining an ith orthogonal sequence corresponding to the ith MPDU from the pre-stored orthogonal sequence set, where i takes all integer values between 2 and p;

The processor 1902 is further configured to: if the receiver 1901 correctly receives the first MPDU, generate a corresponding ACK frame according to the first orthogonal sequence;

The processor 1902 is configured to generate a corresponding i-th ACK frame according to the ith orthogonal sequence, if the receiver 1901 correctly receives the i-th MPDU;

The transmitter 1903 is configured to send the ith ACK frame to the AP in a second time slot, where the second time slot is that the transmitter 1903 performs the m STAs according to the AP. The order of the downlink resource allocation is determined.

Preferably, the processor 1902 is further configured to:

After acquiring the ith orthogonal sequence corresponding to the i-th MPDU from the pre-stored orthogonal sequence set, in accordance with an order in which the i-th MPDU is transmitted to the STA by the AP, The receiver 1901 does not correctly receive the first MPDU, and generates a corresponding NACK frame according to the reverse polarity sequence of the first orthogonal sequence;

The transmitter 1903 is further configured to send the NACK frame to the AP in the first time slot;

The processor 1902 is further configured to: if the receiver 1901 does not correctly receive the i-th MPDU, generate a corresponding i-th NACK frame according to the ith orthogonal sequence;

The transmitter 1903 is further configured to send the ith NACK frame to the AP in the second time slot.

Preferably, the signaling further includes whether the data sent by the AP to the m STAs is first indication information of the aggregated data, and the number of MPDUs included in each aggregated data. Second indication information;

The processor 1902 is configured to: if the data sent by the AP to the STA is aggregated data, perform an order indication of downlink resource allocation by the AP to the m STAs, where the aggregated data includes The indication information of the number of MPDUs, and the order of the jth MPDUs in the data sent by the AP to the STA, acquiring the number corresponding to the jth MPDU from the pre-stored orthogonal sequence set j orthogonal sequence, where j takes all integer values between 1 and p;

The processor 1902 is configured to generate a corresponding ACK frame according to the j-th orthogonal sequence, if the STA correctly receives the j-th MPDU.

Preferably, the processor 1902 is further configured to:

And an order of the downlink resource allocation by the AP to the m STAs, the second indication information, and an order of the jth MPDU in the data sent by the AP to the STA, from the foregoing After acquiring the jth orthogonal sequence corresponding to the jth MPDU in the stored orthogonal sequence set, if the STA does not correctly receive the jth MPDU, according to the inverse pole of the jth orthogonal sequence a sequence of traits, generating a corresponding NACK frame, and transmitting the NACK frame to the AP in the first time slot.

Specifically, the processor 1902 is specifically configured to:

The orthogonal sequence is used as the sequence field, and the short training field is combined to generate a corresponding ACK frame, where the sequence field includes one OFDM symbol.

Specifically, the processor 1902 is further configured to:

According to the STA provided by the embodiment of the present invention, the STA may obtain an orthogonal sequence corresponding to the STA according to the signaling sent by the AP, and then generate a corresponding ACK frame according to the orthogonal sequence. Therefore, when there are multiple STAs in the downlink, each STA can simultaneously reply to the AP with an ACK frame (both in the first time slot). The AP is receiving multiple STAs. After the ACK frame is simultaneously replied, the corresponding STAs can be determined according to the received ACK frame, and then it is determined that the STAs correctly receive the data sent by the AP.

Example VII.

An embodiment of the present invention provides an AP, as shown in FIG. 20, including: a transmitter 2001, a receiver 2002, and a processor 2003.

The transmitter 2001 is configured to send signaling to the m stations STA, where m≥2, where m is an integer;

The receiver 2002 is configured to: if the data sent by the AP to the m STAs does not include aggregated data, receive an ACK frame and/or a NACK frame replied by a STA of the m STAs in a first time slot. ;

The processor 2003 is configured to:

Preferably, the receiver 2002 is further configured to:

After the transmitter 2001 sends signaling to the m station STAs, if the AP The data sent to the m STAs does not include the aggregated data, and receives the NACK frame replied by the STA of the m STAs in the first time slot;

The processor 2003 is further configured to determine, according to the correlation peak, whether a reverse polarity sequence of the qth orthogonal sequence is received;

The processor 2003 is further configured to: if it is determined that the reverse polarity sequence of the qth orthogonal sequence is received, determine the STA corresponding to the qth orthogonal sequence;

The processor 2003 is further configured to confirm that the STA corresponding to the qth orthogonal sequence does not correctly receive data sent by the AP to the STA.

The processor 2003 is specifically configured to:

Optionally, the signaling further includes whether the data sent by the AP to the m STAs is the first indication information of the aggregated data.

The processor 2003 is configured to: after the sender 2001 sends signaling to the m station STAs, if the data sent by the AP to the first STA of the m STAs is aggregated data, according to the AP pair The m STAs perform an order indication of downlink resource allocation, and determine a second time slot corresponding to the first STA;

In the first time slot:

The receiver 2002 is configured to receive an ACK frame that is returned by a STA of the m STAs;

The processor 2003 is configured to perform a cross-correlation operation with the ACK frame by using the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, where q takes all the values between 1 and m. Integer value

The processor 2003 is configured to determine, according to the correlation peak, whether the qth orthogonal sequence is received;

The processor 2003 is configured to: if it is determined that the qth orthogonal sequence is received, the root Determining the STA corresponding to the qth orthogonal sequence according to the sequence of the qth orthogonal sequence in the orthogonal sequence set and the sequence indication of the downlink resource allocation by the AP to the m STAs ;

The processor 2003 is configured to: if the STA corresponding to the qth orthogonal sequence is the first STA, confirm that the first STA correctly receives the first of the data sent by the AP to the STA MPDUs;

The processor 2003 is further configured to: if the STA corresponding to the qth orthogonal sequence is not the first STA, confirm that the STA corresponding to the qth orthogonal sequence correctly receives the AP and sends the STA data;

And/or in the second time slot:

The receiver 2002 is further configured to receive a k-th ACK frame that is sent by the first STA, where k is one or more integer values between 2 and K, and K is sent to the first The number of MPDUs included in the STA data;

The processor 2003 is further configured to perform a cross-correlation operation with the kth ACK frame in the pre-stored orthogonal sequence set to obtain a correlation peak, where t takes 1 to T All the integer values, T is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

The processor 2003 is further configured to determine, according to the correlation peak, whether the t-th orthogonal sequence is received;

The processor 2003 is further configured to: if it is determined that the tth orthogonal sequence is received, determine the tth orthogonal according to an order of the tth orthogonal sequence in the orthogonal sequence set The kth MPDU corresponding to the sequence;

The processor 2003 is further configured to confirm that the first STA correctly receives the kth MPDU.

Preferably, in the first time slot:

The receiver 2002 is further configured to: after the AP performs the downlink resource allocation instruction on the m STAs by the AP, determine the second time slot corresponding to the first STA, and receive the m a NACK frame replied by the STA in the STA;

The processor 2003 is further configured to determine, according to the correlation peak, whether to receive a reverse polarity sequence of the qth orthogonal sequence;

The processor 2003 is further configured to: if it is determined that the reverse polarity sequence of the qth orthogonal sequence is received, according to an order of the qth orthogonal sequence in the orthogonal sequence set, and the And performing, by the AP, the sequence indication of the downlink resource allocation to the m STAs, and determining the STA corresponding to the qth orthogonal sequence;

The processor 2003 is further configured to: if the STA corresponding to the qth orthogonal sequence is the first STA, confirm that the first STA does not correctly receive the data sent by the AP to the STA The first MPDU;

The processor 2003 is further configured to: if the STA corresponding to the qth orthogonal sequence is not the first STA, confirm that the STA corresponding to the qth orthogonal sequence does not correctly receive the AP sent to the STA The data of the STA;

And/or in the second time slot:

The receiver 2002 is further configured to receive a kth NACK frame that is sent back by the first STA, where k is one or more integer values between 2 and K, and K is sent to the first The number of MPDUs included in the STA data;

The processor 2003 is further configured to determine, according to the correlation peak, whether a reverse polarity sequence of the tth orthogonal sequence is received, where t takes all integer values between 1 and T, where T is Determining, by the AP, the downlink resource allocation of the m STAs by the AP;

The processor 2003 is further configured to: if it is determined that the reverse polarity sequence of the tth orthogonal sequence is received, determine the sequence according to the order of the tth orthogonal sequence in the orthogonal sequence set a kth MPDU corresponding to the tth orthogonal sequence;

The processor 2003 is further configured to confirm that the first STA does not correctly receive the kth MPDU.

Preferably, the signaling further includes whether the data sent by the AP to the m STAs is first indication information of the aggregated data, and the AP sends the information to the m STAs. Second indication information of the number of MPDUs included in each aggregated data in the data;

The receiver 2002 is configured to send signaling to the m sites at the access point AP After the STA, if the data sent by the AP to the first STA of the m STAs is aggregated data, the ACK frame returned by the STA of the m STAs is received in the first time slot;

The processor 2003 is configured to perform a cross-correlation operation with the ACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, where s takes all the values between 1 and S An integer value, where S is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

The processor 2003 is configured to determine, according to the correlation peak, whether the sth orthogonal sequence is received;

The processor 2003 is configured to: if it is determined that the sth orthogonal sequence is received, send the information to the m according to an order of the sth orthogonal sequence in the orthogonal sequence set Determining, by the number of the MPDUs included in each of the aggregated data, and the sequence of the downlink resources allocated by the AP to the m STAs, determining the STA corresponding to the sth orthogonal sequence;

The processor 2003 is further configured to determine, according to an order of the sth orthogonal sequence in the orthogonal sequence set, if an STA corresponding to the sth orthogonal sequence is the first STA, The rth MPDU in the data sent by the AP to the first STA corresponding to the sth orthogonal sequence; where r takes one or more integer values between 1 and R, and R is the AP The number of MPDUs included in the data sent to the first STA;

The processor 2003 is configured to confirm that the first STA correctly receives the rth MPDU.

Preferably, the receiver 2002 is further configured to:

After the transmitter 2001 sends signaling to the m station STAs, if the data sent by the AP to the first STA of the m STAs is aggregated data, the m STAs are received in the first time slot. The NACK frame replied by the STA in the middle;

The processor 2003 is further configured to perform a cross-correlation operation with the NACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak;

The processor 2003 is further configured to determine, according to the correlation peak, whether to receive The sth orthogonal sequence, where s takes all integer values between 1 and S, and S is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

The processor 2003 is further configured to: if it is determined that the reverse polarity sequence of the sth orthogonal sequence is received, according to an order of the sth orthogonal sequence in the orthogonal sequence set, the AP Determining the number of MPDUs included in each of the data of the m STAs and the order of the downlink resources allocated by the AP to the m STAs, and determining the sth orthogonal sequence Corresponding STA;

The processor 2003 is further configured to determine, according to an order of the sth orthogonal sequence in the orthogonal sequence set, if an STA corresponding to the sth orthogonal sequence is the first STA, The sth orthogonal sequence corresponds to the rth MPDU in the data sent by the AP to the first STA; where r takes one or more integer values between 1 and R, and R is sent by the AP The number of MPDUs included in the data of the first STA;

The processor 2003 is further configured to confirm that the first STA does not correctly receive the rth MPDU;

The processor 2003 is further configured to: if the STA corresponding to the sth orthogonal sequence is not the first STA, confirm that the STA corresponding to the sth orthogonal sequence does not correctly receive the AP sent to the STA The data of the STA.

On the one hand, the APs provided by the embodiments of the present invention can reduce the system resources to the APs because the STAs can reply the APs with the ACK frames at the same time, instead of replying the ACK frames to the APs in the order of the prior art. Occupy. On the other hand, compared with the ACK frame in the prior art, the embodiment of the present invention is based on the obtained orthogonal sequence. The generated ACK frame has a small overhead, so the system resources used to transmit the ACK frame are relatively small.

It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the above described device is only illustrated by the division of the above functional modules. In practical applications, the above functions may be assigned differently according to needs. The function module is completed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the system, the device and the unit described above, 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 system, 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 modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combinations can be integrated into 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, and may be in an electrical, mechanical or other form.

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 purpose of the solution of the embodiment.

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.

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 may contribute to the prior art or all or part of the technical solution may be in the form of a software product. It is embodied that the computer software product is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform various embodiments of the present invention. All or part of the steps of the method. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A method for receiving and confirming downlink data, characterized in that the method comprises:

The station STA receives the information sent by the access point AP, where the information is sent to the information of the m STAs by the AP, where the m STAs include the STA, m≥2, and m is an integer;

If the data sent by the AP to the STA is not aggregated data, the STA acquires an orthogonal sequence corresponding to the STA according to the information;

If the STA correctly receives the data sent by the AP to the STA, the STA generates a corresponding ACK frame according to the orthogonal sequence, and sends the ACK frame to the AP in the first time slot.
The method according to claim 1, wherein after the STA obtains the orthogonal sequence corresponding to the STA according to the information, the method further includes:

If the STA does not correctly receive the data sent by the AP to the STA, the STA does not send an acknowledgement frame, or generates a corresponding NACK frame according to the reverse polarity sequence of the orthogonal sequence, and The first time slot sends the NACK frame to the AP.
The method according to claim 1 or 2, wherein the information source includes an order indication of downlink resource allocation by the AP to the m STAs;

Obtaining, according to the information, the orthogonal sequence corresponding to the STA, the STA includes:

The STA obtains an orthogonal sequence corresponding to the STA according to an order indication that the AP performs downlink resource allocation on the m STAs.
The method according to claim 3, wherein the information source further includes whether the data sent by the AP to the m STAs is first indication information of the aggregated data;

After the STA receives the information sent by the access point AP, the STA further includes:

Determining, by the STA, whether data sent by the AP to the STA is aggregated data according to the first indication information;

If the data sent by the AP to the STA is aggregated data, the STAs are in turn Receiving p media access control MAC layer protocol data units MPDUs sent by the AP to the STA, where p is the number of MPDUs included in data sent by the AP to the STA;

And the STA obtains a first orthogonal sequence corresponding to the first MPDU from the pre-stored orthogonal sequence set according to the sequence indication of the downlink resource allocation by the AP to the m STAs;

The STA acquires an ith orthogonal sequence corresponding to the i-th MPDU from the pre-stored orthogonal sequence set according to an order of the i-th MPDU in the data that is sent by the AP to the STA, Where i takes all integer values between 2 and p;

If the STA correctly receives the first MPDU, the STA generates a corresponding ACK frame according to the first orthogonal sequence, and sends the ACK frame to the AP in the first time slot;

If the STA correctly receives the i-th MPDU, the STA generates a corresponding i-th ACK frame according to the ith orthogonal sequence, and sends the i-th ACK to the AP in a second time slot. a frame, where the second time slot is determined by the STA according to an order indication that the AP performs downlink resource allocation to the m STAs.
The method according to claim 4, wherein the STA obtains from the pre-stored orthogonal sequence set in the order of the i-th MPDU in the data sent by the AP to the STA. After the ith orthogonal sequence corresponding to the i-th MPDU, the method further includes:

If the STA does not correctly receive the first MPDU, the STA does not send an acknowledgement frame, or generates a corresponding NACK frame according to the reverse polarity sequence of the first orthogonal sequence, and in the foregoing Sending the NACK frame to the AP in a time slot;

If the STA does not correctly receive the ith MPDU, the STA does not send an acknowledgment frame, or generates a corresponding ith NACK frame according to the ith orthogonal sequence, and is in the second time slot. Sending the ith NACK frame to the AP.
The method according to claim 3, wherein the message further includes whether the data sent by the AP to the m STAs is first indication information of aggregated data, and each The number of MPDUs included in the aggregated data Second indication information;

After the STA receives the information sent by the access point AP, the STA further includes:

Determining, by the STA, whether data sent by the AP to the STA is aggregated data according to the first indication information;

If the data sent by the AP to the STA is aggregated data, the STA performs an order indication, a second indication information, and a jth MPDU in the downlink resource allocation of the m STAs according to the AP. Determining, in an order of data sent by the AP to the STA, a j-th orthogonal sequence corresponding to the j-th MPDU from the pre-stored orthogonal sequence set, where j is between 1 and p All integer values;

If the STA correctly receives the jth MPDU, the STA generates a corresponding ACK frame according to the jth orthogonal sequence, and sends the ACK frame to the AP in the first time slot.
The method according to claim 6, wherein the sequence indication, the second indication information, and the jth MPDU of the STA according to the AP performing downlink resource allocation on the m STAs are The sequence of the data sent by the AP to the STA, after acquiring the j-th orthogonal sequence corresponding to the j-th MPDU from the pre-stored orthogonal sequence set, further includes:

If the STA does not correctly receive the jth MPDU, the STA does not send an acknowledgement frame, or generates a corresponding NACK frame according to the reverse polarity sequence of the jth orthogonal sequence, and in the foregoing A slot sends the NACK frame to the AP.
The method according to claim 1, wherein the STA generates a corresponding ACK frame according to the orthogonal sequence, including:

Generating, by the STA, the orthogonal sequence as a sequence field, to generate a corresponding ACK frame, where the sequence field includes one orthogonal frequency division multiplexing OFDM symbol; or

The STA uses the orthogonal sequence as a sequence field, and combines a short training field to generate a corresponding ACK frame, where the sequence field includes one OFDM symbol.
The method according to claim 2, wherein the generating a corresponding NACK frame according to the reverse polarity sequence of the orthogonal sequence comprises:

Generating, by the STA, a reverse polarity sequence of the orthogonal sequence as a sequence field, generating a pair An NACK frame, wherein the sequence field contains one OFDM symbol; or

The STA uses the reverse polarity sequence of the orthogonal sequence as a sequence field, and combines a short training field to generate a corresponding NACK frame, where the sequence field includes one OFDM symbol.
A method for receiving and confirming downlink data, characterized in that the method comprises:

The access point AP sends a message to the m stations STA, m≥2, where m is an integer;

If the data sent by the AP to the m STAs does not include the aggregated data, the AP receives the ACK frame returned by the STA of the m STAs in the first time slot;

The AP performs cross-correlation operation with the ACK frame by using the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines whether the qth is received according to the correlation peak. An orthogonal sequence, wherein q takes all integer values between 1 and m;

If the AP determines that the qth orthogonal sequence is received, the AP determines the STA corresponding to the qth orthogonal sequence;

The AP confirms that the STA corresponding to the qth orthogonal sequence correctly receives data sent by the AP to the STA.
The method according to claim 10, further comprising: after the access point AP sends the message to the m station STAs, the method further comprises:

If the data sent by the AP to the m STAs does not include the aggregated data, the AP receives the NACK frame replied by the STA of the m STAs in the first time slot;

The AP performs a cross-correlation operation with the NACK frame by using the qth orthogonal sequence to obtain a correlation peak, and determines whether to receive the reverse polarity of the qth orthogonal sequence according to the correlation peak. sequence;

If the AP determines to receive the reverse polarity sequence of the qth orthogonal sequence, the AP determines the STA corresponding to the qth orthogonal sequence;

The AP confirms that the STA corresponding to the qth orthogonal sequence does not correctly receive data sent by the AP to the STA.
The method according to claim 10 or 11, wherein the information source includes an order indication that the AP performs downlink resource allocation on the m STAs;

Determining, by the AP, the STA corresponding to the qth orthogonal sequence, including:

Determining, by the AP, the qth orthogonal sequence according to an order of the qth orthogonal sequence in the orthogonal sequence set, and an order indication that the AP performs downlink resource allocation on the m STAs Corresponding STA.
The method according to claim 12, wherein the information source further includes whether the data sent by the AP to the m STAs is first indication information of the aggregated data;

After the access point AP sends the message to the m station STAs, the method further includes:

If the data that is sent by the AP to the first STA of the m STAs is aggregated data, the AP determines, according to the sequence indication of the downlink resources allocation by the AP to the m STAs, Second time slot;

In the first time slot:

The AP receives an ACK frame replied by a STA of the m STAs;

The AP performs cross-correlation operation with the ACK frame by using the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines whether the qth is received according to the correlation peak. An orthogonal sequence, wherein q takes all integer values between 1 and m;

If the AP determines that the qth orthogonal sequence is received, according to the order of the qth orthogonal sequence in the orthogonal sequence set, and the AP performs downlink resource allocation on the m STAs The sequence indicates that the STA corresponding to the qth orthogonal sequence is determined;

If the STA corresponding to the qth orthogonal sequence is the first STA, the AP confirms that the first STA correctly receives the first MPDU in the data sent by the AP to the STA;

If the STA corresponding to the qth orthogonal sequence is not the first STA, the AP confirms that the STA corresponding to the qth orthogonal sequence correctly receives data sent by the AP to the STA;

And/or in the second time slot:

Receiving, by the AP, a k-th ACK frame that is sent by the first STA, where k is one or more integer values between 2 and K, and K is sent by the AP to the first STA. The number of MPDUs included in the data;

The AP performs a cross-correlation operation with the kth ACK frame in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines whether the first phase is received according to the correlation peak. t Orthogonal sequences, where t takes all integer values between 1 and T, and T is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

If the AP determines that the tth orthogonal sequence is received, the AP determines, according to an order of the tth orthogonal sequence in the orthogonal sequence set, the corresponding tth orthogonal sequence The kth MPDU;

The AP confirms that the first STA correctly received the kth MPDU.
The method according to claim 13, wherein after the AP determines the second time slot corresponding to the first STA according to the sequence indication of the downlink STA allocation by the AP to the m STAs, include:

In the first time slot:

Receiving, by the AP, a NACK frame replied by a STA of the m STAs;

The AP performs a cross-correlation operation with the NACK frame by using the qth orthogonal sequence to obtain a correlation peak, and determines whether to receive the reverse polarity of the qth orthogonal sequence according to the correlation peak. sequence;

If the AP determines to receive the reverse polarity sequence of the qth orthogonal sequence, according to the order of the qth orthogonal sequence in the orthogonal sequence set, and the AP to the m The STA performs an order indication of the downlink resource allocation, and determines the STA corresponding to the qth orthogonal sequence;

If the STA corresponding to the qth orthogonal sequence is the first STA, the AP confirms that the first STA does not correctly receive the first MPDU in the data sent by the AP to the STA;

If the STA corresponding to the qth orthogonal sequence is not the first STA, the AP confirms that the STA corresponding to the qth orthogonal sequence does not correctly receive data sent by the AP to the STA;

And/or in the second time slot:

Receiving, by the AP, a kth NACK frame that is sent by the first STA, where k is one or more integer values between 2 and K, where K is included in data sent by the AP to the first STA. The number of MPDUs;

The AP performs cross-correlation operation with the kth NACK frame in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines whether the first phase is received according to the correlation peak. a reverse polarity sequence of t orthogonal sequences, where t takes all integer values between 1 and T, and T is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

If the AP determines that the reverse polarity sequence of the tth orthogonal sequence is received, the AP determines the tth according to an order of the tth orthogonal sequence in the orthogonal sequence set. The kth MPDU corresponding to the orthogonal sequence;

The AP confirms that the first STA does not correctly receive the kth MPDU.
The method according to claim 12, wherein the information source further includes whether the data sent by the AP to the m STAs is first indication information of aggregated data, and a second indication information of the number of MPDUs included in each of the data sent by the AP to the m STAs;

After the access point AP sends the message to the m station STAs, the method further includes:

If the data sent by the AP to the first STA of the m STAs is aggregated data, the AP receives an ACK frame replied by the STA of the m STAs in the first time slot;

The AP performs cross-correlation operation with the ACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines whether the sth is received according to the correlation peak. Orthogonal sequence, where s takes all integer values between 1 and S, and S is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

If the AP determines that the sth orthogonal sequence is received, the AP sends an order of the sth orthogonal sequence in the orthogonal sequence set, and the AP sends the sequence to the m STAs. Determining, by the number of the MPDUs included in each of the aggregated data, and the sequence of the downlink resources allocated by the AP to the m STAs, determining the STA corresponding to the sth orthogonal sequence;

If the STA corresponding to the sth orthogonal sequence is the first STA, the AP determines the sth orthogonal according to an order of the sth orthogonal sequence in the orthogonal sequence set The sequence corresponds to the rth MPDU in the data sent by the AP to the first STA, and confirms that the first STA correctly receives the rth MPDU; wherein r takes one or between R and 1 a plurality of integer values, where R is the number of MPDUs included in data sent by the AP to the first STA;

If the STA corresponding to the sth orthogonal sequence is not the first STA, the AP confirms that the STA corresponding to the sth orthogonal sequence correctly receives data sent by the AP to the STA.
The method according to claim 15, wherein after the access point AP sends the message to the m station STAs, the method further includes:

If the data sent by the AP to the first STA of the m STAs is aggregated data, the AP receives a NACK frame replied by the STA of the m STAs in the first time slot;

The AP performs a cross-correlation operation with the NACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, and determines whether the sth is received according to the correlation peak. Orthogonal sequence, where s takes all integer values between 1 and S, and S is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

If the AP determines to receive the reverse polarity sequence of the sth orthogonal sequence, the AP sends the AP according to the sequence of the sth orthogonal sequence in the orthogonal sequence set. Determining the number of MPDUs included in each of the aggregated data of the m STAs and the order of the downlink resources allocated by the AP to the m STAs, and determining the STA corresponding to the sth orthogonal sequence ;

If the STA corresponding to the sth orthogonal sequence is the first STA, the AP determines the sth orthogonal according to an order of the sth orthogonal sequence in the orthogonal sequence set The sequence corresponds to the rth MPDU in the data sent by the AP to the first STA, and confirms that the first STA does not correctly receive the rth MPDU; wherein r takes a value between 1 and R Or multiple integer values, R is sent by the AP to the The number of MPDUs included in the data of the first STA;

If the STA corresponding to the sth orthogonal sequence is not the first STA, the AP confirms that the STA corresponding to the sth orthogonal sequence does not correctly receive data sent by the AP to the STA.
a STA that is configured to include: a first receiving unit, a first acquiring unit, a first generating unit, and a first sending unit;

The first receiving unit is configured to receive a message sent by the access point AP, where the information is sent to the information of the m STAs by the AP, where the m STAs include the STA , m≥2, m is an integer;

The first acquiring unit is configured to acquire, according to the information, an orthogonal sequence corresponding to the STA, if the data that is sent by the AP to the STA is not aggregated data;

The first generating unit is configured to generate, according to the orthogonal sequence, a corresponding ACK frame, if the STA correctly receives data sent by the AP to the STA;

The first sending unit is configured to send the ACK frame to the AP in a first time slot.
The STA according to claim 17, wherein the STA further comprises: a second generating unit and a second sending unit;

The second generating unit is configured to: after the first acquiring unit acquires the orthogonal sequence corresponding to the STA, according to the information, if the STA does not correctly receive the AP and sends the information to the STA Data, generating a corresponding NACK frame according to the reverse polarity sequence of the orthogonal sequence;

The second sending unit is configured to send the NACK frame to the AP in the first time slot.
The STA according to claim 17 or 18, wherein the information source includes an order indication that the AP performs downlink resource allocation on the m STAs;

The first acquiring unit is specifically configured to obtain an orthogonal sequence corresponding to the STA according to an order indication that the AP performs downlink resource allocation on the m STAs.
The STA according to claim 19, wherein the STA further comprises: a first determining unit, a second receiving unit, a second acquiring unit, and a second generating unit, And a second transmitting unit;

The information packet further includes: first information indicating whether each of the data sent by the AP to the m STAs is aggregated data;

The first determining unit, configured to determine, according to the first indication information, whether the data sent by the AP to the STA is aggregated data, after the first receiving unit receives the information sent by the access point AP ;

The second receiving unit is configured to: if the data sent by the AP to the STA is aggregated data, sequentially receive p media access control MAC layer protocol data units MPDU sent by the AP to the STA, where p is Describe the number of MPDUs included in data sent by the AP to the STA;

The first acquiring unit is further configured to: obtain, according to the sequence indication of the downlink resource allocation by the AP, the first orthogonal sequence corresponding to the first MPDU from the pre-stored orthogonal sequence set. ;

The second acquiring unit, configured to acquire, according to an order of the i-th MPDU in the data that is sent by the AP to the STA, from the pre-stored orthogonal sequence set, corresponding to the i-th MPDU An i-th orthogonal sequence, wherein i takes all integer values between 2 and p;

The first generating unit is further configured to: if the second receiving unit correctly receives the first MPDU, generate a corresponding ACK frame according to the first orthogonal sequence;

The second generating unit is configured to generate a corresponding i-th ACK frame according to the ith orthogonal sequence, if the second receiving unit correctly receives the i-th MPDU;

The second sending unit is configured to send the i-th ACK frame to the AP in a second time slot, where the second time slot is that the second sending unit is configured to the m STAs according to the AP The order of the downlink resource allocation is determined.
The STA according to claim 20, wherein the first generating unit is further configured to:

Obtaining, by the second acquiring unit, an ith corresponding to the i-th MPDU from the pre-stored orthogonal sequence set in an order according to an ith MPDU in data sent by the AP to the STA After the orthogonal sequence, if the second receiving unit is not positive Receiving the first MPDU, and generating a corresponding NACK frame according to the reverse polarity sequence of the first orthogonal sequence;

The first sending unit is further configured to send the NACK frame to the AP in the first time slot;

The second generating unit is further configured to: if the second receiving unit does not correctly receive the ith MPDU, generate a corresponding i-th NACK frame according to the ith orthogonal sequence;

The second sending unit is further configured to send the ith NACK frame to the AP in the second time slot.
The STA according to claim 19, wherein the STA further comprises: a second determining unit, a third obtaining unit, and a third generating unit;

The present invention further includes: first information indicating whether each of the data sent by the AP to the m STAs is aggregated data, and second of the number of MPDUs included in each aggregated data. Indication information;

The second determining unit is configured to determine, after the first receiving unit receives the information sent by the access point AP, whether the data sent by the AP to the STA is aggregated data according to the first indication information. ;

The third acquiring unit is configured to: if the data sent by the AP to the STA is aggregated data, perform an order indication of downlink resource allocation by the AP to the m STAs, where each aggregated data is included The indication information of the number of MPDUs and the sequence of the jth MPDU in the data sent by the AP to the STA, and acquiring, corresponding to the jth MPDU, from the pre-stored orthogonal sequence set a j-orthogonal sequence, wherein j takes all integer values between 1 and p;

The third generating unit is configured to generate a corresponding ACK frame according to the jth orthogonal sequence, if the STA correctly receives the jth MPDU.
The STA according to claim 22, wherein the third generating unit is further configured to:

In the third obtaining unit, according to the sequence indication of the downlink resource allocation by the AP to the m STAs, the second indication information, and the jth MPDU in the The sequence in the data sent by the AP to the STA, after obtaining the j-th orthogonal sequence corresponding to the j-th MPDU from the pre-stored orthogonal sequence set, if the STA does not correctly receive the The jth MPDU generates a corresponding NACK frame according to the reverse polarity sequence of the jth orthogonal sequence, and sends the NACK frame to the AP in the first time slot.
The STA according to claim 17, wherein the first generating unit is specifically configured to:

Generating, by using the orthogonal sequence as a sequence field, a corresponding ACK frame, where the sequence field includes one orthogonal frequency division multiplexing OFDM symbol;

The orthogonal sequence is used as the sequence field, and the short training field is combined to generate a corresponding ACK frame, where the sequence field includes one OFDM symbol.
The STA according to claim 18, wherein the first generating unit is further configured to:

Generating, by using the reverse polarity sequence of the orthogonal sequence as a sequence field, a corresponding NACK frame, where the sequence field includes one OFDM symbol;

The reverse polarity sequence of the orthogonal sequence is used as a sequence field, and a short training field is combined to generate a corresponding NACK frame, where the sequence field includes one OFDM symbol.
An access point AP, the AP includes: a sending unit, a first receiving unit, a first calculating unit, a first determining unit, a second determining unit, and a first confirming unit;

The sending unit is configured to send a message to the m stations STA, m≥2, where m is an integer;

The first receiving unit is configured to: if the data sent by the AP to the m STAs does not include aggregated data, receive an ACK frame returned by a STA of the m STAs in a first time slot;

The first calculating unit is configured to perform a cross-correlation operation with the ACK frame by using the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, where q is between 1 and m. All integer values;

The first determining unit is configured to determine, according to the correlation peak, whether the device is received Said qth orthogonal sequence;

The second determining unit is configured to determine, if the first determining unit determines that the qth orthogonal sequence is received, determine the STA corresponding to the qth orthogonal sequence;

The first confirming unit is configured to confirm that the STA corresponding to the qth orthogonal sequence correctly receives data sent by the AP to the STA.
The AP according to claim 26, wherein the first receiving unit is further configured to:

After the sending unit sends the information to the m station STAs, if the data sent by the AP to the m STAs does not include the aggregated data, the STAs in the m STAs are received in the first time slot. NACK frame;

The first determining unit is further configured to determine, according to the correlation peak, whether a reverse polarity sequence of the qth orthogonal sequence is received;

The second determining unit is further configured to: if the first determining unit determines that the reverse polarity sequence of the qth orthogonal sequence is received, determine the STA corresponding to the qth orthogonal sequence;

The first confirming unit is further configured to confirm that the STA corresponding to the qth orthogonal sequence does not correctly receive data sent by the AP to the STA.
The AP according to claim 26 or 27, wherein the information source includes an order indication that the AP performs downlink resource allocation on the m STAs;

The second determining unit is specifically configured to:

Determining the STA corresponding to the qth orthogonal sequence according to an order of the qth orthogonal sequence in the orthogonal sequence set and an order indication of the downlink resource allocation by the AP to the m STAs .
The AP according to claim 28, wherein the AP further comprises: a third determining unit, a second receiving unit, a second calculating unit, a fourth determining unit, a fifth determining unit, and a second confirming unit;

The information packet further includes: first information indicating whether each of the data sent by the AP to the m STAs is aggregated data;

The third determining unit is configured to: after the transmitting unit sends the information to the m station STAs, if the data sent by the AP to the first STA of the m STAs is aggregating Combining data, determining, according to an order indication of downlink resource allocation of the m STAs by the AP, determining a second time slot corresponding to the first STA;

In the first time slot:

The second receiving unit is configured to receive an ACK frame that is returned by a STA of the m STAs;

The second calculating unit is configured to perform a cross-correlation operation with the ACK frame by using the qth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, where q is between 1 and m All integer values;

The fourth determining unit is configured to determine, according to the correlation peak, whether the qth orthogonal sequence is received;

The fifth determining unit is configured to: if the fourth determining unit determines that the qth orthogonal sequence is received, according to an order of the qth orthogonal sequence in the orthogonal sequence set, and Determining, by the AP, a sequence indication of downlink resource allocation to the m STAs, and determining STAs corresponding to the qth orthogonal sequence;

The second confirming unit is configured to: if the STA corresponding to the qth orthogonal sequence is the first STA, confirm that the first STA correctly receives the data sent by the AP to the STA 1 MPDU;

The second acknowledgment unit is further configured to: if the STA corresponding to the qth orthogonal sequence is not the first STA, confirm that the STA corresponding to the qth orthogonal sequence correctly receives the AP sent to the STA The data of the STA;

And/or in the second time slot:

The second receiving unit is further configured to receive a k-th ACK frame that is sent by the first STA, where k is one or more integer values between 2 and K, and K is sent by the AP to the The number of MPDUs included in the data of one STA;

The second calculating unit is further configured to perform a cross-correlation operation with the kth ACK frame in the pre-stored orthogonal sequence set to obtain a correlation peak, where t takes 1 to T All the integer values between the two are determined by the AP according to the downlink resource allocation of the m STAs by the AP;

The fourth determining unit is further configured to determine, according to the correlation peak, whether to receive The tth orthogonal sequence;

The fifth determining unit is further configured to: if the fourth determining unit determines that the tth orthogonal sequence is received, determine according to an order of the tth orthogonal sequence in the orthogonal sequence set The kth MPDU corresponding to the tth orthogonal sequence;

The second confirming unit is further configured to confirm that the first STA correctly receives the kth MPDU.
The AP according to claim 29, characterized in that

In the first time slot:

The second receiving unit is further configured to: after the AP performs the downlink resource allocation instruction on the m STAs by the AP, determine the second time slot corresponding to the first STA, and receive the m NACK frames replied by STAs in STAs;

The fourth determining unit is further configured to determine, according to the correlation peak, whether a reverse polarity sequence of the qth orthogonal sequence is received;

The fifth determining unit is further configured to: if the fourth determining unit determines to receive the reverse polarity sequence of the qth orthogonal sequence, according to the qth orthogonal sequence in the orthogonal sequence set The sequence of the sequence, and the sequence indication of the downlink resource allocation by the AP to the m STAs, determining the STA corresponding to the qth orthogonal sequence;

The second confirming unit is further configured to: if the STA corresponding to the qth orthogonal sequence is the first STA, confirm that the first STA does not correctly receive data sent by the AP to the STA The first MPDU;

The second acknowledgment unit is further configured to: if the STA corresponding to the qth orthogonal sequence is not the first STA, confirm that the STA corresponding to the qth orthogonal sequence does not correctly receive the AP and send the The data of the STA;

And/or in the second time slot:

The second receiving unit is further configured to receive a kth NACK frame that is sent by the first STA, where k is one or more integer values between 2 and K, and K is sent by the AP to the The number of MPDUs included in the data of one STA;

The fourth determining unit is further configured to determine, according to the correlation peak, whether a reverse polarity sequence of the tth orthogonal sequence is received, where t takes all the integers between 1 and T a value, where T is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

The fifth determining unit is further configured to: if the fourth determining unit determines to receive the reverse polarity sequence of the tth orthogonal sequence, according to the tth orthogonal sequence in the orthogonal sequence set a sequence in which the kth MPDU corresponding to the tth orthogonal sequence is determined;

The second confirming unit is further configured to confirm that the first STA does not correctly receive the kth MPDU.
The AP according to claim 28, wherein the AP further comprises: a third receiving unit, a third calculating unit, a sixth determining unit, a seventh determining unit, and a third confirming unit;

The information packet further includes: first information indicating whether each of the data sent by the AP to the m STAs is aggregated data, and data sent by the AP to the m STAs Second indication information of the number of MPDUs included in each aggregated data;

The third receiving unit is configured to: after the access point AP sends the information to the m station STAs, if the data sent by the AP to the first STA of the m STAs is aggregated data, Receiving, by the first time slot, an ACK frame replied by a STA of the m STAs;

The third calculating unit is configured to perform a cross-correlation operation with the ACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak, where s takes a value between 1 and S All the integer values, S is determined by the AP according to the downlink resource allocation of the m STAs by the AP;

The sixth determining unit is configured to determine, according to the correlation peak, whether the sth orthogonal sequence is received;

The seventh determining unit is configured to: if the sixth determining unit determines that the sth orthogonal sequence is received, according to an order of the sth orthogonal sequence in the orthogonal sequence set, The number of MPDUs included in each of the data sent by the AP to the m STAs, and the sequence indication of the downlink resources allocated by the AP to the m STAs, to determine the sth orthogonal The STA corresponding to the sequence;

The seventh determining unit is further configured to: if the STA corresponding to the sth orthogonal sequence is the first STA, determine according to an order of the sth orthogonal sequence in the orthogonal sequence set The rth MPDU in the data sent by the AP corresponding to the sth orthogonal sequence to the first STA; where r takes one or more integer values between 1 and R, where R is The number of MPDUs included in the data sent by the AP to the first STA;

The third confirming unit is configured to confirm that the first STA correctly receives the rth MPDU.
The AP according to claim 31, wherein the third receiving unit is further configured to:

After the transmitting unit sends the information to the m station STAs, if the data sent by the AP to the first STA of the m STAs is aggregated data, the m STAs are received in the first time slot. NACK frame replied by the STA;

The third calculating unit is further configured to perform a cross-correlation operation with the NACK frame by using the sth orthogonal sequence in the pre-stored orthogonal sequence set to obtain a correlation peak;

The sixth determining unit is further configured to determine, according to the correlation peak, whether the sth orthogonal sequence is received, where s takes all integer values between 1 and S, and S is the AP according to the Determining, by the AP, the downlink resource allocation of the m STAs;

The seventh determining unit is further configured to: if the sixth determining unit determines to receive the reverse polarity sequence of the sth orthogonal sequence, according to the sth orthogonal sequence in the orthogonal sequence set The order of the medium, the number of MPDUs included in each of the data sent by the AP to the m STAs, and the sequence indication of the downlink resource allocation by the AP to the m STAs, determining Said STA corresponding to the sth orthogonal sequence;

The seventh determining unit is further configured to: if the STA corresponding to the sth orthogonal sequence is the first STA, determine according to an order of the sth orthogonal sequence in the orthogonal sequence set The sth orthogonal sequence corresponds to the rth MPDU in the data sent by the AP to the first STA; where r takes one or more integer values between 1 and R, and R is the AP The number of MPDUs included in the data sent to the first STA;

The third confirming unit is further configured to confirm that the first STA is not correctly received. The rth MPDU;

The third acknowledgment unit is further configured to: if the STA corresponding to the sth orthogonal sequence is not the first STA, confirm that the STA corresponding to the sth orthogonal sequence does not correctly receive the AP and send the The data of the STA.