WO2016134546A1

WO2016134546A1 - Feedback method and device, and communication system

Info

Publication number: WO2016134546A1
Application number: PCT/CN2015/073432
Authority: WO
Inventors: 刘亚林; 庞继勇; 张佳胤; 朱俊
Original assignee: 华为技术有限公司
Priority date: 2015-02-28
Filing date: 2015-02-28
Publication date: 2016-09-01
Also published as: CN107409018A; CN107409018B

Abstract

Provided are a feedback method and device, and a communication system, which relate to the field of communications. Data receiving situations of a plurality of receiving devices can be feed back at the same time and on the same channel, thereby meeting the requirements of a wi-fi system after an OFDMA is introduced. The method comprises: a sending device bears data of one or more receiving devices on a resource unit and sends same to the one or more receiving devices; and the sending device receives response information which is sent by the one or more receiving devices and born on N resource elements corresponding to the resource unit, wherein the response information represents that data on the resource unit is successfully received or the data on the resource unit fails to be received.

Description

Feedback method, device and communication system

Technical field

The present invention relates to the field of communications, and in particular, to a feedback method, device, and communication system.

Background technique

In the existing Wi-Fi system, the uplink and downlink data transmission is a single point to single point transmission, that is, at the same time, the same channel, only one STA (Station) to the AP (Access Point, access point) Data is transmitted, or, at the same time, on the same channel, an AP transmits data only to one STA. In the prior art, if the receiving device receives the data successfully, the receiving device feeds back an ACK (Acknowledgement) to the sending device to inform the sending device that the data reception is successful. If the receiving device fails to receive data this time, no feedback information is sent.

After the introduction of OFDMA (Orthogonal Frequency Division Multiple Access) technology, the uplink data transmission will change to multi-point to single-point transmission, and the downlink data transmission will change to single-point to multi-point transmission. That is, at the same time and on the same channel, multiple STAs simultaneously transmit data to the AP; or at the same time and on the same channel, the AP simultaneously transmits data to multiple STAs.

However, in the existing Wi-Fi system, the transmission of the ACK occupies the entire bandwidth, that is, at the same time and on the same channel, only one receiving device can feed back the ACK to the transmitting device, which cannot meet the requirements of the Wi-Fi system after the introduction of OFDMA.

Summary of the invention

The embodiments of the present invention provide a feedback method, a device, and a communication system, which can feed back data reception status of multiple receiving devices at the same time and on the same channel, and meet the requirements of the Wi-Fi system after the introduction of OFDMA.

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

In a first aspect, a feedback method is disclosed, the method comprising:

The sending device carries data of one or more receiving devices on the resource unit Sending by the one or more receiving devices;

The sending device receives response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit; the response information represents that the data on the resource unit is successfully received or the resource is Data reception on the unit failed.

In conjunction with the first aspect, in a first possible implementation of the first aspect,

If the response information indicates that the data on the resource unit is successfully received, the method further includes:

The transmitting device does not receive the response information within a preset time, and then sends the data of the one or more receiving devices to the one or more receiving devices on the resource unit.

In conjunction with the first aspect, in a second possible implementation of the first aspect,

The response information is obtained by the one or more receiving devices repeatedly encoding the data receiving success identifier, or the one or more receiving devices repeatedly encoding the data receiving failure identifier.

In conjunction with the first aspect or the first or second possible implementation of the first aspect, in a third possible implementation of the first aspect,

Before the sending device receives the response information sent by the one or more receiving devices on the N resource particles corresponding to the resource unit, the method further includes:

Receiving, by the sending device, a short training sequence field sent by the one or more receiving devices;

Or the transmitting device receives the short training sequence field and the long training sequence field sent by the one or more receiving devices.

In conjunction with the first aspect or the first or second or third possible implementation of the first aspect, in a fourth possible implementation of the first aspect,

The method further includes:

And if the sending device sends the data to the one or more receiving devices on the M resource units, the sending device receives the M carriers. Response information transmitted by the one or more receiving devices on the M*N resource particles corresponding to the resource unit.

In conjunction with the fourth possible implementation of the first aspect, in a fifth possible implementation of the first aspect,

If the M resource units have only one cyclic redundancy check code CRC check, the M*N resource particles respectively carry the data receiving success identifier, or the M*N resource particles are all loaded on the M*N resource particles. The data reception failure identifier.

In conjunction with the first aspect, in a sixth possible implementation of the first aspect,

The sending, by the sending device, the data of the one or more receiving devices on the resource unit and sending the data to the one or more receiving devices includes:

Transmitting, by the sending device, data of the first receiving device and the second receiving device, on the resource unit, to the first receiving device and the second receiving device;

The receiving, by the sending device, the response information sent by the one or more receiving devices that are carried by the N resource particles corresponding to the resource unit, specifically includes:

The sending device receives the first response information sent by the first receiving device and the second response information sent by the second receiving device, which are carried on the N resource particles corresponding to the resource unit, where the The first response information is a first sequence representing whether the first receiving device successfully receives data, and the second response information is a second sequence representing whether the second receiving device successfully receives data; the first sequence and The second sequence is orthogonal, or,

Receiving, by the sending device, the first response information that is sent by the first receiving device that is carried on the X resource particles corresponding to the resource unit, and receiving the NX resource particles that are corresponding to the resource unit And the second response information sent by the second receiving device.

In a second aspect, a feedback method is disclosed, the method comprising:

Receiving, by the receiving device, data carried on the resource unit, where the resource unit carries data of one or more receiving devices including the receiving device;

The receiving device sends the response information to the sending device on the N resource particles corresponding to the resource unit; the response information represents the resource unit. Successful data reception or data reception on the resource unit failed.

In conjunction with the second aspect, in a first possible implementation of the second aspect,

When the receiving device fails to receive data carried on the resource unit, the receiving device does not send the response information to the sending device.

In conjunction with the second aspect, in a second possible implementation of the second aspect,

Before the receiving device sends the response information to the N resource particles corresponding to the resource unit, the method further includes:

And the receiving device repeatedly encodes the data reception success identifier to obtain the response information, or repeatedly codes the data reception failure identifier to obtain the response information.

In conjunction with the second aspect or the first or second possible implementation of the second aspect, in a third possible implementation of the second aspect,

Sending a short training sequence field to the sending device;

Or sending the short training sequence field and the long training sequence field to the sending device.

In conjunction with the second aspect or the first or second or third possible implementation of the second aspect, in a fourth possible implementation of the second aspect,

The method further includes: if the receiving device receives the data that is carried on the M resource units, the receiving device carries the response information in an M* corresponding to the M resource units The N resource particles are transmitted to the transmitting device.

In conjunction with the fourth possible implementation of the second aspect, in a fifth possible implementation manner of the second aspect,

With reference to the second aspect, in a sixth possible implementation manner of the second aspect, the receiving device is a first receiving device, and the resource unit is configured to carry the sending device The data sent by the first receiving device and the second receiving device,

The sending, by the receiving device, the response information to be sent to the sending device by the N resource particles corresponding to the resource unit, specifically includes:

The first receiving device sends, by the first receiving device, a first sequence of data that is successfully received by the first receiving device to the N resource particles corresponding to the resource unit, to the sending device, where the resource unit corresponds to The N resource particles are further configured to carry a second sequence representative of whether the second receiving device successfully receives data; the first sequence is orthogonal to the second sequence; or

The first receiving device sends the response information to the sending device by using the X resource particles corresponding to the resource unit, where the NX resource particles corresponding to the resource unit are used to carry the Second, the response information of the receiving device.

In a third aspect, a transmitting device is disclosed, including:

a sending unit, configured to carry data of one or more receiving devices on the resource unit, and send the data to the one or more receiving devices;

a receiving unit, configured to receive response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit; the response information represents that data reception on the resource unit is successful or Data reception on the resource unit failed.

In conjunction with the third aspect, in a first possible implementation of the third aspect,

The sending unit is further configured to: if the response information represents that the data on the resource unit is successfully received, and the receiving unit does not receive the response information within a preset time, the one or more The data bearing of the receiving device is sent to the one or more receiving devices on the resource unit.

In conjunction with the third aspect, in a second possible implementation of the third aspect,

With reference to the third aspect, in a third possible implementation manner of the third aspect, the sending unit is specifically configured to: perform data loading of the first receiving device and the second receiving device Transmitting to the first receiving device and the second receiving device on the resource unit;

The receiving unit is further configured to receive, by using the N resource particles corresponding to the resource unit, first response information sent by the first receiving device, and receive N resource particles that are corresponding to the resource unit. The second response information sent by the second receiving device, where the first response information is a first sequence representing whether the first receiving device successfully receives data, and the second response information is a representative office Determining whether the second receiving device successfully receives the second sequence of data; the first sequence is orthogonal to the second sequence, or

The receiving unit is further configured to receive, by using the X resource particles corresponding to the resource unit, the response information sent by the first receiving device, and receive the information that is carried on the NX resource particles corresponding to the resource unit. The response information sent by the second receiving device.

In a fourth aspect, a receiving device is disclosed, which includes:

a receiving unit, configured to receive data carried on a resource unit, where the resource unit carries data of one or more receiving devices including the receiving device;

The sending unit sends the response information to the sending device on the N resource particles corresponding to the resource unit; the response information represents that the data on the resource unit is successfully received or the data receiving on the resource unit fails to be received. .

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect,

The coding unit is configured to: after the sending unit carries the response information on the N resource particles corresponding to the resource unit, send the response information to the data receiving success identifier repeatedly, or The response information is obtained by repeatedly encoding the data reception failure identifier.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in the second possible implementation manner of the fourth aspect, the sending unit is further configured to: carry the response information in the resource unit corresponding to Before sending the N resource particles to the sending device, sending a short training sequence field to the sending device;

Or, the response information is carried on the N resource particles corresponding to the resource unit. The short training sequence field and the long training sequence field are transmitted to the transmitting device before being transmitted to the transmitting device.

With reference to the fourth aspect, in a third possible implementation manner of the fourth aspect, the receiving device is a first receiving device, and the resource unit is configured to carry the sending device to the first receiving device

The sending unit is further configured to: send, by using the first sequence of data that is successfully received by the first receiving device, on the N resource particles corresponding to the resource unit, to the sending device, where the resource unit is Corresponding N resource particles are further configured to carry a second sequence that is representative of whether the second receiving device successfully receives data; the first sequence is orthogonal to the second sequence; or

And transmitting the response information to the sending device by using the X resource particles corresponding to the resource unit, where the N-X resource particles corresponding to the resource unit are used to carry the response information of the second receiving device.

In a fifth aspect, a transmitting device is disclosed, including:

a processor, configured to send, by using a communication interface, data of one or more receiving devices on the resource unit to the one or more receiving devices;

a processor, configured to receive, by using a communication interface, response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit; the response information represents that the data on the resource unit is successfully received. Or the data reception on the resource unit fails.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect,

The response information is that the one or more receiving devices repeatedly encode the data receiving success identifier to obtain the response information, or repeatedly encode the data receiving failure identifier to obtain the response information.

With reference to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect,

The processor is further configured to: before receiving the response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit, receive the one or more receiving devices by using a communication interface. Short training sequence field sent;

Or receiving the short training sent by the one or more receiving devices by using a communication interface before receiving the response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit. Sequence domain, long training sequence domain.

In a sixth aspect, a receiving device is disclosed, including:

a processor, configured to receive, by using a communication interface, data carried on a resource unit, where the resource unit carries data of one or more receiving devices including the receiving device;

The processor is further configured to: send the response information to the sending device by using the communication interface on the N resource particles corresponding to the resource unit; the response information represents that the data receiving on the resource unit is successful or The data reception on the resource unit failed.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect,

The processor is further configured to: after transmitting the response information on the N resource particles corresponding to the resource unit, send the response information to the data receiving success identifier to obtain the response information, or receive the data. The failure identification duplicate code obtains the response information.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect,

The processor is further configured to send a short training sequence field to the sending device by using a communication interface before the response information is sent to the N resource particles corresponding to the resource unit;

Or sending the short training sequence field and the long training sequence field to the sending device through the communication interface before the response information is sent to the N resource particles corresponding to the resource unit.

In a seventh aspect, a communication system is disclosed, including: a transmitting device and a receiving device,

The transmitting device is the transmitting device according to the third aspect of the foregoing technical solution, and the receiving device is the receiving device according to the third aspect of the foregoing technical solution;

Or the sending device is the sending device according to the fifth aspect of the foregoing technical solution; The receiving device is the receiving device according to the sixth aspect of the foregoing technical solution;

Wherein, if the sending device is an access point AP, the receiving device is a station STA; if the sending device is the STA, the receiving device is the AP; the communication system includes one of the An AP and at least one of the STAs.

The feedback method, the device and the communication system provided by the present invention, the transmitting device carries the data on the resource unit and sends the data to the receiving device, and the receiving device further carries the response information (that is, the information indicating the success or failure of the data receiving) in the resource unit. The resource particles are transmitted to the transmitting device. Since the bandwidth can be divided into multiple resource units in the frequency domain, multiple response information can be fed back at the same time. In this way, data reception status of multiple receiving devices can be fed back at the same time and on the same channel, which can meet the requirements of the Wi-Fi system after the introduction of OFDMA.

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 an existing resource grid;

2 is a schematic flowchart of a method for feeding back a data receiving situation according to Embodiment 1 of the present invention;

3(a) is a schematic structural diagram of a conventional ACK transmission frame;

FIG. 3(b) is a schematic structural diagram of an ACK transmission frame provided by the present invention;

FIG. 3(c) is another schematic structural diagram of an ACK transmission frame provided by the present invention;

4 is a schematic diagram of bearer of resource particles according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of a method for feeding back a data receiving situation according to Embodiment 2 of the present invention;

FIG. 6 is a schematic flowchart of a method for feeding back a data receiving situation according to Embodiment 3 of the present invention;

FIG. 7 is a schematic flowchart of a method for feeding back a data receiving situation according to Embodiment 4 of the present invention;

FIG. 8 is a schematic flowchart of a method for feeding back a data receiving situation according to Embodiment 5 of the present invention;

9 is a structural block diagram of a transmitting device according to Embodiment 6 of the present invention;

10 is a structural block diagram of a receiving device according to Embodiment 7 of the present invention;

11 is a structural block diagram of a transmitting device according to Embodiment 8 of the present invention;

FIG. 12 is a structural block diagram of a receiving device according to Embodiment 9 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.

In existing Wi-Fi systems, including legacy (traditional) systems based on IEEE (Institute of Electrical and Electronics Engineers) 802.11a, HT (High Throughput) based on IEEE 802.11n The system and the IEEE 802.11ac-based VHT (Very High Throughput) system, the uplink data transmission is a single point to single point transmission, that is, at the same time, the same channel or the same spectrum, only one STA direction The AP transmits data. The downlink data transmission is also a single-point to single-point transmission, that is, the AP transmits to only one STA at the same time and in the same spectrum. In the Wi-Fi system after the introduction of OFDMA technology, or the HEW (High Efficiency WLAN) system, the uplink data transmission will no longer be a single-point to single-point transmission, but a multi-point to single-point transmission, that is, At the same time, the same channel or the same spectrum, there are multiple STAs transmitting data to the AP at the same time; the downlink data transmission is no longer a single-point to single-point transmission, but a single-point to multi-point transmission, that is, at the same time, On the same channel or the same spectrum, the AP transmits data to multiple STAs simultaneously.

In existing Wi-Fi systems, use ACK or NACK to send feedback to the sending device. Receive data reception status of the device. The ACK indicates that the receiving device successfully receives data, the NACK indicates that the receiving device fails to receive data, and the transmitting device needs to retransmit the data to the receiving device after receiving the NACK. The physical layer frame format of the ACK (NACK) transmission frame is: a leading part + a content part. The leading part includes a traditional short training sequence domain, a traditional long training sequence domain, and a traditional signaling domain. The MAC layer format of the ACK (NACK) content portion includes a frame control field, a duration field, a receiving device address, and a frame control sequence.

Since the transmission of the ACK frame occupies the entire bandwidth, at the same time, the same channel, or the same spectrum, only one ACK frame can be transmitted (that is, only one receiving device can be fed back), which cannot satisfy the Wi-Fi system after the introduction of OFDMA. Demand. In addition, there are many contents in the frame format, and the resource overhead consumed is too large.

In addition, the resource particles and resource units involved in the embodiments of the present invention are explained. As shown in Figure 1, one column can be used to represent the signals transmitted in one time slot, and one line represents the information transmitted on one subcarrier. In FIG. 1, RE (resource element) is a resource particle according to the present invention, and a resource unit is composed of A*B resource particles. Where A represents A symbols and B represents B subcarriers. It should be noted that the existing ACK feedback is designed based on the user terminal, that is, once the data is sent to one user terminal, and the user terminal feeds back an ACK/NACK to the sending device, and the present invention designs the ACK feedback information based on the resource unit, that is, The data bearer transmits data to the receiving device on a resource unit, and the receiving device transmits a feedback message to the sending device according to whether the data transmission succeeds or not on the resource unit, to inform the sending device whether the data transmission on the resource unit is successful. In the prior art, the ACK transmission occupies the entire bandwidth, that is, the ACK transmission occupies 20 MHz. As shown in FIG. 1, the ACK transmission will occupy all subcarriers in the frequency domain of FIG. In the present application, the receiving device uses a resource unit to feed back the data receiving situation to the sending device. Since the bandwidth can be divided into multiple resource units in the frequency domain, multiple response information (ie, information representing the data receiving situation) can be fed back at the same time. .

It should be noted that the receiving device may not send any feedback information when the data transmission fails.

Example 1:

The embodiment of the invention provides a feedback method, which is applied to a sending device, and the sending device The device may be an AP or an STA in a Wi-Fi system after the introduction of OFDMA. As shown in FIG. 2, the method includes the following steps:

101. The sending device carries data of one or more receiving devices on the resource unit and sends the data to the one or more receiving devices.

The sending device may be an AP, and the receiving device may be an STA. Alternatively, the sending device is a STA, and the receiving device is an AP. Specifically, in uplink transmission, multiple STAs can simultaneously send data to the AP. The bandwidth can be divided into multiple resource units in the frequency domain, and one STA can send data to the AP through one or more resource units. Other STAs may also send data to the AP through one or more resource units. Similarly, in downlink transmission, an AP may send data to one STA through one or more resource units. The AP may also send data to other STAs through one or more resource units. From the perspective of a resource unit, it can carry data of one or more receiving devices (downlink transmission) or data carrying one or more transmitting devices (uplink transmission).

In addition, for any resource unit in the uplink transmission, there are corresponding resource particles in the downlink transmission to feed back whether the data carried on the resource unit is successfully transmitted. For any resource unit in the downlink transmission, in the uplink transmission, there is a corresponding resource particle to feed back whether the data carried on the resource unit is successfully transmitted. The so-called uplink transmission, that is, the user terminal transmits data to the AP. The so-called downlink transmission, that is, the AP transmits data to the user terminal. For example, referring to FIG. 1, the resource unit 1 is used for the AP to transmit data to the STA1, and the resource particles corresponding to the resource unit 1 in the uplink transmission are used by the STA1 to feed back the data reception situation of the STA1 to the AP. In the uplink transmission, the resource particle corresponding to the resource unit 1 may be a resource particle in the same frequency band as the resource unit 1, as shown in FIG. 1, the resource particle in the frequency band in which the resource unit 1 is located, for example, in the area 1 shown in FIG. Resource particles, or resource particles in region 2. The resource particles corresponding to the resource unit 1 may also be resource particles of different frequency bands from the resource unit, such as resource particles in the frequency band in which the resource unit 2 is located, such as resource particles in the region 3 as shown in FIG. 1, or Resource particles in region 4. The correspondence between the resource unit and the resource particle is preset by the system and is not limited herein.

102. The sending device receives N resources that are corresponding to the resource unit. Response information transmitted by the one or more receiving devices on the particle; the response information representing success of data reception on the resource unit or data reception failure on the resource unit.

In a specific implementation, the response information is obtained by repeatedly encoding the data receiving success identifier by the one or more receiving devices, or the one or more receiving devices repeatedly encoding the data receiving failure identifier. The data receiving success identifier is carried on the N resource particles, or the data receiving failure identifier is carried on the N resource particles.

For example, it may be that 1 indicates that the receiving device data is successfully received, and 0 indicates that the receiving device data reception fails. Or, 1 indicates that the receiving device data is successfully received, and if the receiving device data fails to receive, no response information is transmitted to the transmitting device. It should be noted that, since the sending device sends the data to the receiving device, the receiving device sends the response information to the N resource particles corresponding to the resource unit to the sending device. For example, if the resource elements correspond to the four resource particles, and the receiving device data is successfully received, the four resource particles all carry one. The transmitting end receives the 1 (ie, 1111) carried on the four resource particles, and further determines that the receiving device data is successfully received.

It is to be noted that before the sending device receives the response information sent by the one or more receiving devices that are carried by the N resource particles corresponding to the resource unit, the method further includes:

The transmitting device receives a short training sequence field sent by the one or more receiving devices.

Referring to FIG. 3(a), it is a schematic structural diagram of a prior art ACK transmission frame, including: a short training sequence domain, a long training sequence domain, a signaling domain, a frame structure of an ACK content part, and a method provided by the present invention, The signaling domain needs to be transmitted, or the long training sequence domain and the signaling domain need not be transmitted to the receiving device. For example, FIG. 3(b) is a schematic structural diagram of an ACK transmission frame provided by the present invention, including: STF (Short Training Sequence Field), DATA (ACK content part). FIG. 3(c) is a schematic structural diagram of another ACK transmission frame provided by the present invention, including: STF (Short Training Sequence Domain), LTF (Long Training Sequence Domain), and ACK content portion. In addition, in conjunction with FIG. 3(b), in the method for providing hungry, the ACK content portion is less than the prior art, and includes: a data receiving success identifier carried on a resource particle corresponding to the resource unit, or a data receiving failure identifier. , or data reception success identification and data reception failure identification. For example, if the transmitting device carries the data on one resource unit and sends the data to the receiving device, and the resource unit corresponds to four resource particles, when the receiving device data is successfully received, the ACK content portion is 1111. In this way, the signaling transmission load is reduced, and the resources occupied are less, which improves the resource utilization of the system.

In a preferred embodiment of the present invention, if the sending device sends the first data to the first receiving device on the resource unit 1, the second data is carried on the resource unit 2 to the second receiving device. send.

Receiving, by the sending device, the first response information that is sent by the first receiving device, which is carried on the N resource particles corresponding to the resource unit 1, and the receiving, by the N resource particles corresponding to the resource unit 2, The second response information sent by the second receiving device.

In a preferred implementation of the present invention, if the response information represents that the data on the resource unit is successfully received, the method further includes:

In a preferred embodiment of the present invention, if the sending device sends the data to the one or more receiving devices on the M resource units, the sending device receives the M carriers. Response information transmitted by the one or more receiving devices on the M*N resource particles corresponding to the resource unit.

In addition, if the M resource units have only one CRC check, the M*N resource particles all carry the data receiving success identifier, or the M*N resource particles all carry the data receiving Failure ID.

For example, in conjunction with FIG. 4, if the transmitting device transmits data to three receiving units (resource unit 1, resource unit 2, and resource unit 3) to the receiving device, and each resource unit corresponds to four resource particles, when The receiving device data is successfully received, and the 12 (4*3) resource particles corresponding to the three resource units are all carried by 1, that is, the resource particles corresponding to the resource unit 1, the resource unit 2, and the resource unit 3 are all carried by 1.

In a preferred embodiment of the present invention, the sending, by the sending device, the data of the one or more receiving devices on the resource unit and sending the data to the one or more receiving devices includes: the sending device, the first receiving device, and The data bearer of the second receiving device is sent to the first receiving device and the second receiving device on the resource unit.

Exemplarily, there is one AP and at least one STA in the Wi-Fi system after the introduction of OFDMA. Here, the AP transmits data to multiple STAs simultaneously. It should be noted that the AP usually transmits data to at least one STA through M resource units. If the AP transmits data to the two STAs through the M resource units, the M*N resource particles corresponding to the M resource units are used for the first STA feedback response information (ie, data reception status), and are used for the second STA feedback. Response information. For example, if the AP carries the first data bearer on one resource unit to the first STA, and the second data bearer is transmitted on the resource unit to the second STA. The first STA receives success according to its own data, in this fund The orthogonal sequence a or -a is transmitted on the four resource particles corresponding to the source unit, wherein the sequence a indicates that the first STA successfully receives data, and the sequence -a indicates that the first STA data reception fails. Sequences a and -a occupy 4 resource particles. The second STA sends an orthogonal sequence b or -b on the four resource particles corresponding to the resource unit according to the success or failure of the data reception, wherein the sequence b indicates that the first STA successfully receives data, and the sequence -b indicates the first STA data. Receive failed. Sequences b and -b occupy 4 resource particles. The sequences a and b are orthogonal to each other. The AP receives the first response information transmitted by the first STA and the second response information transmitted by the second STA on the four resource particles corresponding to the resource unit, and decodes the first response information sent by the first STA by using the orthogonal code a, The second response information transmitted by the second STA is decoded using the orthogonal code b.

Alternatively, the AP transmits data to two STAs through three resource units (each resource unit corresponding to four resource particles). The first STA sends aaa or -a-a-a on the 12 resource particles corresponding to the three resource units according to whether the data is successfully received or not, and a occupies 4 resource particles. The second STA transmits bbb or -b-b-b on the 12 resource particles corresponding to the three resource units according to the success of the self-receiving, wherein b occupies 4 resources, and b is orthogonal to a. The AP receives the first response information transmitted by the first STA and the second response information transmitted by the second STA on the 12 resource particles, and decodes the first response information sent by the first STA by using the orthogonal code a, and uses the orthogonal code. b decoding the second response information sent by the second STA.

If the AP transmits data to the two STAs through the M resource units, X of the M*N resource particles corresponding to the M resource units is used for the first STA feedback response information (ie, data reception status), and the M resource units Corresponding remaining M*NX resource particles are used for the second STA feedback response information. For example, an AP usually transmits data to at least one STA through three resource units (each resource unit corresponding to four resource particles). If the AP transmits data to two STAs through M resource units, for the four resource particles corresponding to each resource unit, the above two resource particles may be used for the first STA feedback response information, and the following 2 are used. The resource particles are used for the second STA feedback response information. In general, 6 of the 12 resource particles corresponding to the three resource units are used for the first STA feedback response information (ie, data reception), and the three resource units correspond to The remaining 6 resource particles are used for the second STA feedback response information.

The present invention provides a data receiving situation feedback method, in which the transmitting device transmits data to the receiving device, and the receiving device transmits the response information to the resource device corresponding to the resource unit to the transmitting device. Since the bandwidth can be divided into multiple resource units in the frequency domain, multiple response information can be fed back at the same time. In this way, the data reception situation of multiple receiving devices can be fed back at the same time and on the same channel. In contrast, the prior art uses ACK or NACK to feed back the data receiving situation of the receiving device, but the transmission of ACK or NACK occupies the entire bandwidth, that is, At the same time and on the same channel, only one data receiving device can feed back ACK to the data transmitting device, which cannot meet the requirements of the Wi-Fi system after the introduction of OFDMA. The method provided by the embodiments of the present invention can meet the requirements of the Wi-Fi system after the introduction of OFDMA.

Example 2:

An embodiment of the present invention provides a feedback method, where the execution subject is a receiving device, as shown in FIG. 5, the method includes the following steps:

201. The receiving device receives data carried on a resource unit, where the resource unit carries data of one or more receiving devices including the receiving device.

The sending device may be an AP, and the receiving device may be an STA. Alternatively, the sending device is a STA, and the receiving device is an AP.

The receiving device sends the response information to the sending device on the N resource particles corresponding to the resource unit; the response information represents that the data on the resource unit is successfully received or on the resource unit. Data reception failed.

In a specific implementation, the receiving device repeatedly encodes the data receiving success identifier to obtain the response information, or repeatedly encodes the data receiving failure identifier to obtain the response information. The data receiving success identifier is carried on the N resource particles, or the data receiving failure identifier is carried on the N resource particles.

For example, it may be that 1 indicates that the receiving device data is successfully received, and 0 indicates that the receiving device data reception fails. Or, 1 indicates that the receiving device data is successfully received, and if the receiving device data fails to receive, no response information is transmitted to the transmitting device. It should be noted that, since the sending device carries the data on one resource unit and sends the data to the receiving device. The sending and receiving device sends the response information to the sending device by carrying the N resource particles corresponding to the resource unit. For example, if the resource elements correspond to the four resource particles, and the receiving device data is successfully received, the four resource particles all carry one. The transmitting end receives the 1 (ie, 1111) carried on the four resource particles, and further determines that the receiving device data is successfully received.

Example 3:

An embodiment of the present invention provides a feedback method. As shown in FIG. 6, the method includes the following steps:

301. The sending device sends the first data bearer on the resource unit to the first receiving device.

The sending device may be an AP, and the receiving device may be an STA. Alternatively, the sending device is a STA, and the receiving device is an AP. Specifically, in uplink transmission, multiple STAs can simultaneously send data to the AP. The bandwidth can be divided into multiple resource units in the frequency domain, and one STA can send data to the AP through one or more resource units. Other STAs may also send data to the AP through one or more resource units. Similarly, in downlink transmission, an AP may send data to one STA through one or more resource units. The AP may also send data to other STAs through one or more resource units.

In addition, for any resource unit in the uplink transmission, there is a pair in the downlink transmission. The resource particles should be used to feed back whether the data carried on the resource unit is successfully transmitted. For any resource unit in the downlink transmission, in the uplink transmission, there is a corresponding resource particle to feed back whether the data carried on the resource unit is successfully transmitted.

302. The first receiving device receives the first data that is carried on the resource unit.

303. The first receiving device sends a short training sequence field to the sending device.

Here, the first device may further send a long training sequence field to the sending device after step 303.

304. The first receiving device sends the response information to the sending device by using the N resource particles corresponding to the resource unit.

The response information represents that data reception on the resource unit is successful or data reception on the resource unit fails.

In a specific implementation, the first receiving device repeatedly encodes the data receiving success identifier to obtain the response information, or repeatedly encodes the data receiving failure identifier to obtain the response information. The data receiving success identifier is carried on the N resource particles corresponding to the resource unit, or the data receiving failure identifier is carried on the N resource particles corresponding to the resource unit.

305. The sending device receives response information sent by the first receiving device that is carried by the N resource particles corresponding to the resource unit.

If the N resource particles corresponding to the resource unit all carry the data receiving success identifier, the sending device does not need to send the first data again; if the resource unit pair The data reception failure identifier is carried on all the N resource particles, and the sending device needs to send the first data again.

Example 4:

An embodiment of the present invention provides a feedback method. As shown in FIG. 7, the method includes the following steps:

401. The AP sends the first data to the first STA by using the M resource units, and sends the second data to the second STA by using the M resource units.

The resource unit is a resource unit in downlink transmission, and corresponds to N resource particles in uplink transmission. Therefore, the M resource units correspond to N*M resource particles in uplink transmission.

402. The first STA receives the first data.

403. The second STA receives the second data.

404. The first STA sends, by using the first sequence of the first receiving device, whether the data is successfully received on the N resource particles corresponding to the resource unit, to the sending device.

405. The second STA sends, by using the second sequence of data, whether the second receiving device successfully receives data, to the N resource particles corresponding to the resource unit, to send to the sending device.

Wherein the first sequence is orthogonal to the second sequence. Specifically, if the AP passes 3 funds The source units (each resource unit corresponding to 4 resource particles) transmit data to two STAs. The first STA sends aaa or -a-a-a on the 12 resource particles corresponding to the three resource units according to whether the data is successfully received or not, and a occupies 4 resource particles. The second STA transmits bbb or -b-b-b on the 12 resource particles corresponding to the three resource units according to the success of the self-receiving, wherein b occupies 4 resources, and b is orthogonal to a. The AP receives the first response information transmitted by the first STA and the second response information transmitted by the second STA on the 12 resource particles, and decodes the first response information sent by the first STA by using the orthogonal code a, and uses the orthogonal code. b decoding the second response information sent by the second STA.

406. The AP receives first response information and second response information that are carried on the M*N resource particles corresponding to the M resource units.

The first response information, that is, the first sequence, represents whether the first receiving device successfully receives data. The second response information, that is, the second sequence, represents whether the second receiving device successfully receives data. The first sequence is orthogonal to the second sequence. The AP decodes using the corresponding orthogonal code to obtain corresponding response information. For example, the AP decodes the first response information using the orthogonal code a, and the AP decodes the second response information using the orthogonal code b. It can be known whether the first STA and the first STA successfully receive data.

Example 5:

An embodiment of the present invention provides a feedback method. As shown in FIG. 8, the method includes the following steps:

501. The AP sends the first data to the first STA by using the M resource units, and sends the second data to the second STA by using the M resource units.

502. The first STA receives the first data.

503. The second STA receives the second data.

504. The first STA sends the response information of the first STA to the AP resource fragments corresponding to the M resource units.

505. The second STA sends the response information of the second STA to the AP by using the M*N-X resource particles corresponding to the M resource units.

For example, if an AP sends data to the first STA and the second STA through three resource units, and each resource unit corresponds to four resource particles, the three resource particles correspond to 12 resource particles in the uplink transmission. If STA1 sends the response information to the AP on the 6 resource particles, STA2 sends the response information to the AP on the remaining 6 resource particles. If the STA1 data is successfully received, the six resource particles corresponding to the STA1 bear the data receiving success identifier. If the STA1 data reception fails, the six resource particles corresponding to the STA1 bear the data receiving failure identifier.

Example 6

The embodiment of the present invention provides a sending device 60. As shown in FIG. 9, the sending device 60 includes: a sending unit 601 and a receiving unit 602.

In addition, for any resource unit in the uplink transmission, there are corresponding resource particles in the downlink transmission to feed back whether the data carried on the resource unit is successfully transmitted. For any resource unit in the downlink transmission, in the uplink transmission, there is a corresponding resource particle to feed back whether the data carried on the resource unit is successfully transmitted. The so-called uplink transmission, that is, the user terminal transmits data to the base station. The so-called downlink transmission, that is, the base station transmits data to the user terminal.

The sending unit 601 is configured to send data of one or more receiving devices to the resource unit and send the data to the one or more receiving devices.

The receiving unit 602 is configured to receive response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit, where the response information represents that the data on the resource unit is successfully received or received. The data reception on the resource unit failed.

The data receiving success identifier is carried on the N resource particles corresponding to the resource unit, or the data receiving failure identifier is carried on the N resource particles corresponding to the resource unit.

The receiving unit 602 is further configured to: receive the bearer corresponding to the resource unit Before receiving the response information sent by the one or more receiving devices on the N resource particles, receiving the short training sequence field sent by the one or more receiving devices.

Or transmitting, by the sending device 602, the one sent by the one or more receiving devices, before receiving the response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit. Short training sequence domain and long training sequence domain.

If the sending unit 601 sends the data to the one or more receiving devices on the M resource units, the receiving unit 602 receives the M corresponding to the M resource units. * Response information transmitted by the one or more receiving devices on the N resource particles.

If the M resource elements have only one CRC check, the M*N resource particles all carry the data receiving success identifier, or the M*N resource particles all carry the data receiving failure identifier. .

The sending unit 601 is specifically configured to: send data of the first receiving device and the second receiving device to the first receiving device and the second receiving device by using the data of the first receiving device and the second receiving device;

The receiving unit 602 is further configured to: receive the first response information that is sent by the first receiving device, and receive the N resources that are corresponding to the resource unit that are carried by the resource unit. a second response information sent by the second receiving device on the particle; wherein the first response information is a first sequence representing whether the first receiving device successfully receives data, and the second response information is representative Whether the second receiving device successfully receives the second sequence of data; the first sequence is orthogonal to the second sequence, or

The receiving unit 602 is further configured to receive, by using the X resource particles corresponding to the resource unit, the response information sent by the first receiving device, and receive the information on the NX resource particles corresponding to the resource unit. The response information sent by the second receiving device.

Exemplarily, there is one AP and at least one STA in the Wi-Fi system after the introduction of OFDMA. Here, the AP transmits data to multiple STAs simultaneously. It should be noted that AP Data is typically transmitted to at least one STA through M resource elements. If the AP transmits data to the two STAs through the M resource units, the M*N resource particles corresponding to the M resource units are used for the first STA feedback response information (ie, data reception status), and are used for the second STA feedback. Response information. For example, if the AP carries the first data bearer on one resource unit to the first STA, and the second data bearer is transmitted on the resource unit to the second STA. The first STA sends an orthogonal sequence a or -a on the four resource particles corresponding to the resource unit according to the success or failure of the data reception, wherein the sequence a indicates that the first STA successfully receives data, and the sequence -a indicates the first STA data. Receive failed. Sequences a and -a occupy 4 resource particles. The second STA sends an orthogonal sequence b or -b on the four resource particles corresponding to the resource unit according to the success or failure of the data reception, wherein the sequence b indicates that the first STA successfully receives data, and the sequence -b indicates the first STA data. Receive failed. Sequences b and -b occupy 4 resource particles. The sequences a and b are orthogonal to each other. The AP receives the first response information transmitted by the first STA and the second response information transmitted by the second STA on the four resource particles corresponding to the resource unit, and decodes the first response information sent by the first STA by using the orthogonal code a, The second response information transmitted by the second STA is decoded using the orthogonal code b.

If the AP transmits data to the two STAs through the M resource units, X of the M*N resource particles corresponding to the M resource units is used for the first STA feedback response information (ie, data reception status), and the M resource units Corresponding remaining M*NX resource particles are used for the second STA feedback response information. For example, an AP usually passes through 3 resource units. (Each resource unit corresponds to 4 resource particles) Transfer data to at least one STA. If the AP transmits data to two STAs through M resource units, for the four resource particles corresponding to each resource unit, the above two resource particles may be used for the first STA feedback response information, and the following 2 are used. The resource particles are used for the second STA feedback response information. In general, 6 of the 12 resource elements corresponding to the three resource units are used for the first STA feedback response information (ie, data reception), and the remaining six resource particles corresponding to the three resource units are used for the first Two STA feedback response information.

The device of the present invention provides the data receiving device. The transmitting device transmits the data to the receiving device on the resource unit, and the receiving device further transmits the response information to the resource device corresponding to the resource unit to the transmitting device. Since the bandwidth can be divided into multiple resource units in the frequency domain, multiple response information can be fed back at the same time. In this way, the data reception situation of multiple receiving devices can be fed back at the same time and on the same channel. In contrast, the prior art uses ACK or NACK to feed back the data receiving situation of the receiving device, but the transmission of ACK or NACK occupies the entire bandwidth, that is, At the same time and on the same channel, only one data receiving device can feed back ACK to the data transmitting device, which cannot meet the requirements of the Wi-Fi system after the introduction of OFDMA. The device provided by the embodiment of the present invention can meet the requirements of the Wi-Fi system after the introduction of OFDMA.

Example 7

The embodiment of the present invention provides a receiving device 70. As shown in FIG. 10, the receiving device 70 includes a receiving unit 701 and a sending unit 702.

In addition, for any resource unit in the uplink transmission, there is a pair in the downlink transmission. The resource particles should be used to feed back whether the data carried on the resource unit is successfully transmitted. For any resource unit in the downlink transmission, in the uplink transmission, there is a corresponding resource particle to feed back whether the data carried on the resource unit is successfully transmitted. The so-called uplink transmission, that is, the user terminal transmits data to the base station. The so-called downlink transmission, that is, the base station transmits data to the user terminal.

The receiving unit 701 is configured to receive data carried on a resource unit, where the resource unit carries data of one or more receiving devices including the receiving device.

The sending unit 702 sends the response information to the sending device on the N resource particles corresponding to the resource unit; the response information represents that the data on the resource unit is successfully received or the data is received on the resource unit. failure.

The sending device 70 further includes an encoding unit, where the encoding unit is configured to successfully receive data before the sending unit sends the response information on the N resource particles corresponding to the resource unit to the sending device. Identifying the repetitive coding to obtain the response information, or repeatedly coding the data reception failure identifier to obtain the response information.

The sending unit 702 is further configured to send a short training sequence field to the sending device before transmitting the response information on the N resource particles corresponding to the resource unit to the sending device;

The sending unit 702 is further configured to send the short training sequence field and the long training sequence to the sending device before the sending the response information on the N resource particles corresponding to the resource unit to the sending device. area.

The sending unit 702 is further configured to: if the receiving unit 701 receives the data that is carried on the M resource units, the response information is carried in the M* corresponding to the M resource units. The N resource particles are transmitted to the transmitting device.

If the receiving device is the first receiving device, the resource unit is configured to carry the sending device to the first receiving device, and the sending unit 702 is further configured to:

And transmitting, by the first resource device, the first sequence of the data to be successfully received by the first receiving device, to the sending device, where the N resource particles corresponding to the resource unit are used. And carrying a second sequence representative of whether the second receiving device successfully receives data; the first sequence is orthogonal to the second sequence.

Or transmitting the response information to the sending device by using the X resource particles corresponding to the resource unit, where the NX resource particles corresponding to the resource unit are used to carry the response of the second receiving device. information.

Example 8

The embodiment of the present invention provides a transmitting device 80. As shown in FIG. 11, the transmitting device 80 can include a processor 801, a system bus 802, a communication interface 803, and a memory 804.

The processor 801 can be a central processing unit (English: central processing unit, abbreviation: CPU).

The memory 804 is configured to store the program code and transmit the program code to the processor 801. The processor 801 executes the following instructions according to the program code. The memory 804 can include a volatile memory, such as random access memory. (English: random-access memory, abbreviation: RAM); memory 804 may also include non-volatile memory (English: non-volatile memory), such as read-only memory (English: read-only memory, abbreviation: ROM), Flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state drive, abbreviation: SSD). Memory 804 can also include a combination of the above types of memory. The processor 801, the memory 804, and the communication interface 803 are connected by the system bus 802 and complete communication with each other.

Communication interface 803 can be implemented by an optical transceiver, an electrical transceiver, a wireless transceiver, or any combination thereof. For example, the optical transceiver can be a small form-factor pluggable transceiver (sFP) transceiver (English: transceiver), and the enhanced small form-factor pluggable (English: enhanced small form-factor pluggable, Abbreviation: SFP+) Transceiver or 10 Gigabit small form-factor pluggable (XFP) transceiver. The electrical transceiver can be an Ethernet (Ethernet) network interface controller (English: network interface controller, abbreviation: NIC). The wireless transceiver can be a wireless network interface controller (English: wireless network interface controller, abbreviation: WNIC). Transmitting device 80 can have multiple communication interfaces 803.

In addition, for any resource unit in the uplink transmission, there are corresponding resource particles in the downlink transmission to feed back whether the data carried on the resource unit is successfully transmitted. For any resource unit in the downlink transmission, in the uplink transmission, there is a corresponding resource particle to feed back whether the data carried on the resource unit is successfully transmitted. Uplink transmission, ie The user terminal transmits data to the base station. The so-called downlink transmission, that is, the base station transmits data to the user terminal.

The processor 801 is configured to send, by using the communication interface 803, data of one or more receiving devices on the resource unit to the one or more receiving devices.

The processor 801 is configured to receive, by using the communication interface 803, response information sent by the one or more receiving devices that are carried by the N resource particles corresponding to the resource unit; the response information represents data on the resource unit. The reception was successful or the data reception on the resource unit failed.

The response information is obtained by the one or more receiving devices repeatedly encoding the data receiving success identifier, or the one or more receiving devices repeatedly encoding the data receiving failure identifier. The data receiving success identifier is carried on the N resource particles corresponding to the resource unit, or the data receiving failure identifier is carried on the N resource particles corresponding to the resource unit.

The processor 801 is further configured to: before receiving the response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit, receive the one or more by using the communication interface 803. a short training sequence field sent by the receiving device;

The processor 801 is further configured to: before receiving the response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit, receive the one or more by using the communication interface 803. Receiving the short training sequence field and the long training sequence field sent by the device.

If the processor 801 transmits the data to the one or more receiving devices on the M resource units, the processor 801 is further configured to receive, by the communication interface 803, the bearer in the Response information transmitted by the first receiving device on M*N resource particles corresponding to the M resource units.

If the processor 801 carries data of the first receiving device and the second receiving device And transmitting to the first receiving device and the second receiving device on the resource unit. The processor 801 is further configured to receive, by using the N resource particles corresponding to the resource unit, the first response information sent by the first receiving device, and receive the N resources that are corresponding to the resource unit. a second response information sent by the second receiving device on the particle; wherein the first response information is a first sequence representing whether the first receiving device successfully receives data, and the second response information is representative Whether the second receiving device successfully receives the second sequence of data; the first sequence is orthogonal to the second sequence, or receives the first of the X resource particles corresponding to the resource unit The response information sent by the receiving device receives the response information sent by the second receiving device that is carried on the NX resource particles corresponding to the resource unit.

Exemplarily, there is one AP and at least one STA in the Wi-Fi system after the introduction of OFDMA. Here, the AP transmits data to multiple STAs simultaneously. It should be noted that the AP usually transmits data to at least one STA through M resource units. If the AP transmits data to the two STAs through the M resource units, the M*N resource particles corresponding to the M resource units are used for the first STA feedback response information (ie, data reception status), and are used for the second STA feedback. Response information. For example, if the AP carries the first data bearer on one resource unit to the first STA, and the second data bearer is transmitted on the resource unit to the second STA. The first STA sends an orthogonal sequence a or -a on the four resource particles corresponding to the resource unit according to the success or failure of the data reception, wherein the sequence a indicates that the first STA successfully receives data, and the sequence -a indicates the first STA data. Receive failed. Sequences a and -a occupy 4 resource particles. The second STA sends an orthogonal sequence b or -b on the four resource particles corresponding to the resource unit according to the success or failure of the data reception, wherein the sequence b indicates that the first STA successfully receives data, and the sequence -b indicates the first STA data. Receive failed. Sequences b and -b occupy 4 resource particles. The sequences a and b are orthogonal to each other. The AP receives the first response information transmitted by the first STA and the second response information transmitted by the second STA on the four resource particles corresponding to the resource unit, and decodes the first response information sent by the first STA by using the orthogonal code a, The second response information transmitted by the second STA is decoded using the orthogonal code b.

Or, the AP passes three resource units (each resource unit corresponds to four resource particles) Transfer data to two STAs. The first STA sends aaa or -a-a-a on the 12 resource particles corresponding to the three resource units according to whether the data is successfully received or not, and a occupies 4 resource particles. The second STA transmits bbb or -b-b-b on the 12 resource particles corresponding to the three resource units according to the success of the self-receiving, wherein b occupies 4 resources, and b is orthogonal to a. The AP receives the first response information transmitted by the first STA and the second response information transmitted by the second STA on the 12 resource particles, and decodes the first response information sent by the first STA by using the orthogonal code a, and uses the orthogonal code. b decoding the second response information sent by the second STA.

If the AP transmits data to the two STAs through the M resource units, X of the M*N resource particles corresponding to the M resource units is used for the first STA feedback response information (ie, data reception status), and the M resource units Corresponding remaining M*NX resource particles are used for the second STA feedback response information. For example, an AP usually transmits data to at least one STA through three resource units (each resource unit corresponding to four resource particles). If the AP transmits data to two STAs through M resource units, for the four resource particles corresponding to each resource unit, the above two resource particles may be used for the first STA feedback response information, and the following 2 are used. The resource particles are used for the second STA feedback response information. In general, 6 of the 12 resource elements corresponding to the three resource units are used for the first STA feedback response information (ie, data reception), and the remaining six resource particles corresponding to the three resource units are used for the first Two STA feedback response information.

Example 9

The embodiment of the present invention provides a receiving device 90. As shown in FIG. 12, the receiving device 90 can include a processor 901, a system bus 902, a communication interface 903, and a memory 904.

The processor 901 can be a central processing unit (English: central processing unit, abbreviation: CPU).

The memory 904 is configured to store the program code and transmit the program code to the processor 901. The processor 901 executes the following instructions according to the program code. The memory 904 may include a volatile memory (English: volatile memory), such as a random access memory (English: random-access memory, abbreviation: RAM); the memory 904 may also include a non-volatile memory (English: non-volatile memory) ), such as read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state Drive, abbreviation: SSD). The memory 904 may also include a combination of the above types of memories. The processor 901, the memory 904, and the communication interface 903 are connected by the system bus 902 and complete communication with each other.

Communication interface 903 can be implemented by an optical transceiver, an electrical transceiver, a wireless transceiver, or any combination thereof. For example, the optical transceiver can be a small form-factor pluggable transceiver (sFP) transceiver (English: transceiver), and the enhanced small form-factor pluggable (English: enhanced small form-factor pluggable, Abbreviation: SFP+) Transceiver or 10 Gigabit small form-factor pluggable (XFP) transceiver. The electrical transceiver can be an Ethernet (Ethernet) network interface controller (English: network interface controller, abbreviation: NIC). The wireless transceiver can be a wireless network interface controller (English: wireless network interface controller, abbreviation: WNIC). Transmitting device 90 can have multiple communication interfaces 903.

The sending device may be an AP, and the receiving device may be an STA. Alternatively, the sending device is a STA, and the receiving device is an AP. Specifically, in uplink transmission, multiple STAs can simultaneously send data to the AP. Bandwidth can be divided into frequency domains For multiple resource units, one STA may send data to the AP through one or more resource units. Other STAs may also send data to the AP through one or more resource units. Similarly, in downlink transmission, an AP may send data to one STA through one or more resource units. The AP may also send data to other STAs through one or more resource units.

The processor 901 is configured to receive, by using the communication interface 903, data carried on a resource unit, where the resource unit carries data of one or more receiving devices including the receiving device.

The processor 901 is further configured to: send, by using the communication interface 903, the response information on the N resource particles corresponding to the resource unit to the sending device; the response information represents that the data on the resource unit is successfully received. Or the data reception on the resource unit fails.

The processor 901 is further configured to: before the sending the response information on the N resource particles corresponding to the resource unit, send the response information to the data receiving success identifier to obtain the response information, or the data The reception failure flag is repeatedly encoded to obtain the response information.

The processor 901 is further configured to send a short training sequence field to the sending device by using the communication interface 903 before the response information is sent to the N resource particles corresponding to the resource unit.

The processor 901 is further configured to: carry the response information corresponding to the resource unit The short training sequence field and the long training sequence field are transmitted to the transmitting device through the communication interface 903 before being transmitted to the transmitting device on the N resource particles.

The processor 901 is further configured to: if the data that is carried on the M resource units is received, the response information is carried by the communication interface 903 in the M corresponding to the M resource units. *N resource particles are sent to the transmitting device.

If the receiving device is the first receiving device, the resource unit is configured to carry the sending device to the first receiving device, and the processor is used by the processor 901 to determine whether the first receiving device successfully receives data. The first sequence is sent to the sending device by using the N resource particles corresponding to the resource unit, where the N resource particles corresponding to the resource unit are further used to bear whether the second receiving device successfully receives data. a second sequence; the first sequence is orthogonal to the second sequence.

Example 10:

An embodiment of the present invention provides a communication system, where the communication system includes: a sending device And receiving equipment.

The transmitting device is the sending device provided in Embodiment 6 above; and the receiving device is the receiving device provided in Embodiment 7 above.

Wherein, if the sending device is an access point AP, the receiving device is a station STA; if the sending device is the STA, the receiving device is the AP; the communication system includes one of the An AP and at least one of the STAs. Specifically, in uplink transmission, multiple STAs can simultaneously send data to the AP. The bandwidth can be divided into multiple resource units in the frequency domain, and one STA can send data to the AP through one or more resource units. Other STAs may also send data to the AP through one or more resource units. Similarly, in downlink transmission, an AP may send data to one STA through one or more resource units. The AP may also send data to other STAs through one or more resource units.

The communication system of the data receiving situation provided by the present invention, the transmitting device transmits the data on the resource unit to the receiving device, and the receiving device transmits the response information to the resource device corresponding to the resource unit to the transmitting device. In this way, the data reception situation of multiple receiving devices can be fed back at the same time and on the same channel. In contrast, the prior art uses ACK or NACK to feed back the data receiving situation of the receiving device, but the transmission of ACK or NACK occupies the entire bandwidth, that is, At the same time and on the same channel, only one data receiving device can feed back ACK to the data transmitting device, which cannot meet the requirements of the Wi-Fi system after the introduction of OFDMA. The system provided by the embodiments of the present invention can meet the requirements of the Wi-Fi system after the introduction of OFDMA.

Example 10:

The transmitting device is the sending device provided in Embodiment 8 above; and the receiving device is the receiving device provided in Embodiment 9 above.

The communication system of the data receiving situation provided by the present invention, the transmitting device transmits the data on the resource unit to the receiving device, and the receiving device transmits the response information to the resource device corresponding to the resource unit to the transmitting device. Since the bandwidth can be divided into multiple resource units in the frequency domain, multiple response information can be fed back at the same time. In this way, the data reception situation of multiple receiving devices can be fed back at the same time and on the same channel. In contrast, the prior art uses ACK or NACK to feed back the data receiving situation of the receiving device, but the transmission of ACK or NACK occupies the entire bandwidth, that is, At the same time and on the same channel, only one data receiving device can feed back ACK to the data transmitting device, which cannot meet the requirements of the Wi-Fi system after the introduction of OFDMA. The system provided by the embodiments of the present invention can meet the requirements of the Wi-Fi system after the introduction of OFDMA.

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

Claims

A feedback method, characterized in that the method comprises:

Transmitting, by the sending device, data of one or more receiving devices, on the resource unit, to the one or more receiving devices;

The sending device receives response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit; the response information represents that the data on the resource unit is successfully received or the resource is Data reception on the unit failed.
The method according to claim 1, wherein if the response information represents that the data on the resource unit is successfully received, the method further comprises:

The transmitting device does not receive the response information within a preset time, and then sends the data of the one or more receiving devices to the one or more receiving devices on the resource unit.
The method according to claim 1, wherein the response information is obtained by the one or more receiving devices repeatedly encoding the data receiving success identifier, or the one or more receiving devices receiving data. The failure identifies the duplicate code obtained.
The method according to any one of claims 1-3, wherein the sending device receives the response information sent by the one or more receiving devices on the N resource particles corresponding to the resource unit. The method further includes:

Receiving, by the sending device, a short training sequence field sent by the one or more receiving devices;

Or the transmitting device receives the short training sequence field and the long training sequence field sent by the one or more receiving devices.
The method according to any one of claims 1 to 4, wherein the method further comprises:

If the sending device sends the data to the one or more receiving devices on the M resource units, the sending device receives the M*N corresponding to the M resource units. Response information transmitted by the one or more receiving devices on the resource particles.
The method according to claim 5, wherein if the M resource units have only one cyclic redundancy check code CRC check, the M*N resource particles respectively carry the data reception success identifier. Or the data reception failure identifier is carried on the M*N resource particles.
The method of claim 1 wherein

The sending, by the sending device, the data of the one or more receiving devices on the resource unit and sending the data to the one or more receiving devices includes:

Transmitting, by the sending device, data of the first receiving device and the second receiving device, on the resource unit, to the first receiving device and the second receiving device;

The receiving, by the sending device, the response information sent by the one or more receiving devices that are carried by the N resource particles corresponding to the resource unit, specifically includes:

The sending device receives the first response information sent by the first receiving device and the second response information sent by the second receiving device, which are carried on the N resource particles corresponding to the resource unit, where the The first response information is a first sequence representing whether the first receiving device successfully receives data, and the second response information is a second sequence representing whether the second receiving device successfully receives data; the first sequence and The second sequence is orthogonal, or,

Receiving, by the sending device, the first response information that is sent by the first receiving device that is carried on the X resource particles corresponding to the resource unit, and receiving the NX resource particles that are corresponding to the resource unit And the second response information sent by the second receiving device.
A feedback method, characterized in that the method comprises:

Receiving, by the receiving device, data carried on the resource unit, where the resource unit carries data of one or more receiving devices including the receiving device;

The receiving device sends the response information to the sending device on the N resource particles corresponding to the resource unit; the response information represents that the data on the resource unit is successfully received or the data is received on the resource unit. failure.
The method according to claim 8, wherein if the response information represents that the data on the resource unit is successfully received, the method further comprises:

When the receiving device fails to receive data carried on the resource unit, the receiving device does not send the response information to the sending device.
The method according to claim 8, wherein the method further comprises: before the receiving device sends the response information to the N resource particles corresponding to the resource unit, and the method further includes:

And the first receiving device repeatedly encodes the data receiving success identifier to obtain the response information, or repeatedly encodes the data receiving failure identifier to obtain the response information.
The method according to any one of claims 8 to 10, wherein the receiving device sends the response information to the transmitting device after transmitting the response information on the N resource particles corresponding to the resource unit. include:

Sending a short training sequence field to the sending device;

Or sending the short training sequence field and the long training sequence field to the sending device.
The method of any of claims 8-11, wherein the method further comprises:

If the receiving device receives the data that is carried on the M resource units, the receiving device carries the response information on the M*N resource particles corresponding to the M resource units. The sending device sends.
The method according to claim 12, wherein if the M resource units have only one cyclic redundancy check code CRC check, the M*N resource particles respectively carry the data reception success identifier. Or the data reception failure identifier is carried on the M*N resource particles.
The method according to claim 8, wherein the receiving device is a first receiving device, and the resource unit is configured to carry data sent by the sending device to the first receiving device and the second receiving device,

The sending, by the receiving device, the response information to be sent to the sending device by the N resource particles corresponding to the resource unit, specifically includes:

The first receiving device sends, by the first receiving device, a first sequence of data that is successfully received by the first receiving device to the N resource particles corresponding to the resource unit, to the sending device, where the resource unit corresponds to N resource particles are also used to host generations Whether the second receiving device successfully receives the second sequence of data; the first sequence is orthogonal to the second sequence; or

The first receiving device sends the response information to the sending device by using the X resource particles corresponding to the resource unit, where the NX resource particles corresponding to the resource unit are used to carry the Second, the response information of the receiving device.
A transmitting device, comprising:

a sending unit, configured to carry data of one or more receiving devices on the resource unit, and send the data to the one or more receiving devices;

a receiving unit, configured to receive response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit; the response information represents that data reception on the resource unit is successful or Data reception on the resource unit failed.
The transmitting device according to claim 15, comprising:

The sending unit is further configured to: if the response information represents that the data on the resource unit is successfully received, and the receiving unit does not receive the response information within a preset time, the one or more The data bearing of the receiving device is sent to the one or more receiving devices on the resource unit.
The transmitting device according to claim 15, wherein the response information is obtained by the one or more receiving devices repeatedly encoding the data receiving success identifier, or the one or more receiving devices fail to receive the data. Identify the duplicate code obtained.
The transmitting device according to any one of claims 15-17, wherein the receiving unit is further configured to: receive the one or more receiving on the N resource particles corresponding to the resource unit Receiving a short training sequence field sent by the one or more receiving devices before the response information sent by the device;

Or the transmitting device receives the short message sent by the one or more receiving devices before receiving the response information sent by the one or more receiving devices that are carried on the N resource particles corresponding to the resource unit. Training sequence domain and long training sequence domain.
The transmitting device according to any one of claims 15 to 18, wherein if the transmitting unit carries the data on the M resource units to the one Or the receiving unit is configured to receive, by the receiving unit, the response information that is transmitted by the one or more receiving devices that are carried on the M*N resource particles corresponding to the M resource units.
The transmitting device according to claim 19, wherein if the M resource units have only one cyclic redundancy check code CRC check, the data is successfully received on the M*N resource particles. The data reception failure identifier is carried on the identifier, or the M*N resource particles.
The transmitting device according to claim 15, wherein the sending unit is specifically configured to carry data of the first receiving device and the second receiving device on the resource unit to the first receiving device and Sending by the second receiving device;

The receiving unit is further configured to receive, by using the N resource particles corresponding to the resource unit, first response information sent by the first receiving device, and receive N resource particles that are corresponding to the resource unit. The second response information sent by the second receiving device, where the first response information is a first sequence representing whether the first receiving device successfully receives data, and the second response information is a representative office Determining whether the second receiving device successfully receives the second sequence of data; the first sequence is orthogonal to the second sequence, or

The receiving unit is further configured to receive, by using the X resource particles corresponding to the resource unit, the response information sent by the first receiving device, and receive the information that is carried on the NX resource particles corresponding to the resource unit. The response information sent by the second receiving device.
A receiving device, comprising:

a receiving unit, configured to receive data carried on a resource unit, where the resource unit carries data of one or more receiving devices including the receiving device;

The sending unit sends the response information to the sending device on the N resource particles corresponding to the resource unit; the response information represents that the data on the resource unit is successfully received or the data receiving on the resource unit fails to be received. .
The receiving device according to claim 22, further comprising an encoding unit,

The coding unit is configured to: after the sending unit carries the response information on the N resource particles corresponding to the resource unit, send the response information to the data receiving success identifier repeatedly, or The response information is obtained by repeatedly encoding the data reception failure identifier.
The receiving device according to claim 22 or 23, wherein the sending unit is further configured to: before transmitting the response information on the N resource particles corresponding to the resource unit, to the sending device, Sending, by the sending device, a short training sequence field;

Or sending the short training sequence field and the long training sequence field to the sending device before the response information is sent to the sending device on the N resource particles corresponding to the resource unit.
The receiving device according to any one of claims 22 to 24, wherein the transmitting unit is further configured to: if the receiving unit receives the data carried on the M resource units, The response information is transmitted to the transmitting device on the M*N resource particles corresponding to the M resource units.
The receiving device according to claim 25, wherein if the M resource units have only one cyclic redundancy check code CRC check, the data is successfully received on the M*N resource particles. The data reception failure identifier is carried on the identifier, or the M*N resource particles.
The receiving device according to claim 22, wherein the receiving device is a first receiving device, and the resource unit is configured to carry the sending device to the first receiving device,

The sending unit is further configured to: send, by using the first sequence of data that is successfully received by the first receiving device, on the N resource particles corresponding to the resource unit, to the sending device, where the resource unit is Corresponding N resource particles are further configured to carry a second sequence that is representative of whether the second receiving device successfully receives data; the first sequence is orthogonal to the second sequence; or

Transmitting the response information to the sending device by using the X resource particles corresponding to the resource unit; wherein, the N-X resource particles corresponding to the resource unit are used by And carrying the response information of the second receiving device.
A communication system, comprising: a transmitting device and a receiving device,

The transmitting device is the transmitting device according to any one of claims 15 to 21;

The receiving device is the receiving device according to any one of claims 22 to 27;

Wherein, if the sending device is an access point AP, the receiving device is a station STA; if the sending device is the STA, the receiving device is the AP; the communication system includes one of the An AP and at least one of the STAs.