WO2018082219A1

WO2018082219A1 - Method for determining bss attribution, method for sending control frame and related device

Info

Publication number: WO2018082219A1
Application number: PCT/CN2017/073613
Authority: WO
Inventors: 杜振国; 丁志明
Original assignee: 华为技术有限公司
Priority date: 2016-11-03
Filing date: 2017-02-15
Publication date: 2018-05-11
Also published as: CN109906664B; CN109906664A

Abstract

Provided by the embodiments of the present application are a method for determining BSS attribution, a method for sending a control frame and a related device, which are used for aiding a receiving terminal in determining the BSS to which a control frame belongs. The method of the embodiments of the present application comprises: a second device acquiring a PLCP protocol data unit (PPDU) carrying a control frame which is sent by a first device, the PPDU comprising a first color, and the first color being used to identify a basic service set (BSS) to which the first device belongs; the second device determining whether the first color is the same as a pre-stored second color, the second color being used for identifying the BSS to which the second device belongs; and the second device determining that the control frame is from the BSS to which the second device belongs if the first color is the same as the second color. Thus, the device may effectively distinguish control frames sent using a PPDU format by means of color comparison so as to execute a corresponding operation according to the BSS to which the control frames belong.

Description

Method for determining BSS attribution, method for transmitting control frame, and related device

This application claims to be filed on November 3, 2016, the Chinese Patent Office, the application number is 201610953030.3, and the invention is entitled "a method and device for distinguishing control frame BSS attribution", the entire contents of which are incorporated herein by reference. In the application.

Technical field

The present application relates to the field of communications, and in particular, to a method for determining a BSS attribution, a method for transmitting a control frame, a device for determining a BSS attribution, and a device for transmitting a control frame.

Background technique

The medium access control (MAC) frame of the 802.11 standard can be divided into three categories: data frame, management frame, and control frame. The MAC header address field of the part of the control frame may not include a Basic SERVICE Set Identifier (BSSID). For example, for a frame such as Request to Send (RTS) or Clear to Send (CTS), the BSSID may not be included in the MAC header address field. Specifically, for CTS and Acknowledge (ACK) frames, since there are only Receiver Address (RA) fields in the MAC header, it is used for Downlink (DL) transmission and Direct Link Establishment (Direct). -link Setup; DLS)/Tunneled Direct-Link Setup (TDLS) transmission, the RA domain does not contain the BSSID; and for RTS, Block Acknowledge (BA) and Block Acknowledge (Block Acknowledge) The Request, BAR) frame has two address fields: RA and Transmitter Address (TA) in the MAC header. When used for DLS/TDLS transmission, neither the RA domain nor the TA domain contain the BSSID. The DLS/TDLS transmission refers to the transmission between two stations (Stations, STAs) associated with the same access point (AP). The RA domain and the TA domain are the addresses of the transmitting and receiving parties respectively, and obviously do not contain the BSSID. In addition, control frames such as RTS and CTS are mainly used for transmission protection, and legacy devices should also be able to receive. Therefore, these control frames cannot be transmitted in the HE PPDU format, but can only be transmitted using the legacy PPDU format, that is, cannot pass physical. The header includes Color to indicate the base of the Basic Service Set (BSS). The so-called legacy PPDU format, which is a PLCP protocol data unit (PPDU) format based on Orthogonal Frequency Division Multiplexing (OFDM) proposed by the 802.11a/g standard, where the PLCP service data unit ( PLCP SERVICE data unit, PSDU) is the MAC frame. Legacy PPDUs are also known as non-HT PPDUs. HT is High Throughput. PLCP is the Physical Layer Convergence Procedure. The HE PPDU format is the PPDU format proposed by the 802.11ax standard. The physical header contains Color, which is used to indicate the identifier of the BSS to which the device transmitting the PPDU belongs, which is equivalent to a simplified representation of the BSSID.

The BSS ID is not included in the MAC header of the RTS, CTS, ACK, BA, and BAR, and the color cannot be carried by the physical header. The Color is used to identify the BSS to which the device that sends the control frame belongs. Therefore, when the STA receives such a control frame and its address field does not include the BSSID of the BSS to which the STA belongs, the STA cannot determine whether the frame is a control frame from the BSS device. If the STA is not sure whether the received control frame is a device from the BSS, it will cause some errors in the operation of the STA.

Summary of the invention

An embodiment of the present application provides a method for determining a BSS attribution, a method for transmitting a control frame, and a device for determining a BSS attribution and a device for transmitting a control frame, where the receiving end determines a BSS to which the control frame belongs.

A first aspect of the present invention provides a method for determining a BSS attribution, where the method includes: acquiring, by a second device, a physical layer convergence process protocol data unit PPDU of a bearer control frame sent by the first device, where the PPDU includes a Data field, The Data field includes a physical layer aggregation process service data unit PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a first color, and the first color is used to identify the basic service set BSS to which the first device belongs. Then, the second device determines whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs. The second Color may be pre-stored on the storage module of the second device. If the first Color and the second Color are the same, the second device determines that the control frame is from the BSS to which the second device belongs. If the first Color and the second Color are not the same, the second device determines that the control frame is from the BSS to which the non-second device belongs. Thus, the second device can perform different operations according to different BSSs of the control frame. For example, if the control frame is from the BSS to which the second device belongs, the second device may set the intra-NAV according to the Duration carried by the control frame, but does not affect the regular-NAV, or the second device carries according to the control frame. CF-End, release intra-NAV, but does not affect regular-NAV.

Thus, by comparing Color, the device can effectively distinguish the control frame sent in the PPDU format to perform the corresponding operation according to the home BSS of the control frame. The PPDU format can be a legacy PPDU format. For example, a device that accepts a control frame can set a correct NAV according to the attribution of the control frame, so that the dual NAV mechanism is more effective, avoids interference, and increases equipment signal transmission opportunities. The color is set in the tail padding part of the PPDU, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

With reference to the first aspect of the embodiments of the present application, in a first implementation manner of the first aspect of the application, the tail padding part further includes a check field, where the check field may be, for example, a parity code and a loop redundancy. I code and so on. Before the second device determines whether the first color and the pre-stored second color are the same, the implementation further includes: the second device determining, according to the check field, whether the first color is received correctly. If the first Color is received correctly, the second device performs a step of determining whether the first Color and the pre-stored second Color are the same. The second device can verify whether the corresponding first color is received correctly by the check field. The setting of the check field can improve the reliability of the transmitted Color, and the check field is set in the tail padding part to avoid increasing the transmission overhead.

With reference to the first implementation manner of the first aspect of the embodiment of the present application, in the second implementation manner of the first aspect of the embodiment of the present application, the tail padding part further includes a tail information Tail, and the Tail is used to improve BCC decoding at the receiving end. performance. The first Color and check fields have a plurality of specific setting positions in the PPDU. For example, the first Color and the check field are located after the Tail, that is, the first Color and the check field are located at the tail padding portion after the Tail, so that Make full use of the padding bits after the Tail, and do not affect the Tail. Alternatively, the first Color and check fields are located before the Tail. When the decoder does not use the known sequence of Tail for auxiliary decoding, the Tail is set such that the decoding performance of the receiving end is not affected, and the first Color and the calibration are also guaranteed. Valid transmission of the field.

With reference to the first aspect of the embodiment of the present application or the first or second implementation manner of the first aspect, in the third implementation manner of the first aspect of the embodiment of the present application, the end of the tail padding portion further includes remaining padding bits. Pad, Pad is an all-zero sequence.

After the first color is filled in the tail padding portion or the first color and the check field are filled, when the remaining padding bits remain, since the original padding bits Pad bits are all zero sequences, the remaining padding bits Pad are determined as an all-zero sequence. The modification of the tail padding portion can be reduced. When the Pad is a known sequence at the transmitting and receiving ends, the receiving end can decode the Pad as a Tail, which is advantageous for increasing the decoding probability of the data tail bits.

With reference to the first aspect of the embodiments of the present application, in a fourth implementation manner of the first aspect of the application, the tail padding part further includes a tail information Tail and a check field, and in the tail padding part, the check field and the first A Color is located after the Tail, and the first Color is located at the end of the tail padding portion, where Tail is used to improve the BCC decoding performance of the receiving end. Before the second device determines whether the first color and the pre-stored second color are the same, the method of the implementation manner further includes: performing, by the second device, BCC decoding on the Tail portion and the Tail portion in the Data domain, and in the Data domain The part after Tail performs Tail-biting BCC decoding. And in order to verify whether the first color is received correctly, thereby improving the reliability of the method implementation, the second device determines whether the first color is received correctly based on the check field; if the first color is received correctly, the second device performs determining the first color and The pre-stored second color is the same step.

With reference to the first aspect or the first or second implementation manner of the embodiment of the present application, in a fifth implementation manner of the first aspect of the embodiment of the present application, the PPDU further includes a presence indication, and the presence indication is used to indicate that the PPDU includes the first A Color. Before the second device determines whether the first color and the pre-stored second color are the same, the method of the implementation manner further includes: determining, by the second device, whether the PPDU includes the presence indication. If the PPDU includes a presence indication, the second device performs a step of determining whether the first Color and the pre-stored second Color are the same. By the prompt of the presence indication, the PHY of the second device determines whether it is necessary to identify the first Color, or whether the corresponding bit sequence of the first Color needs to be transmitted to the MAC layer for identification. This can improve the execution efficiency of the method of the present implementation.

A second aspect of the present application provides a method for determining a BSS attribution, where the method includes: the second device acquires a PPDU of a bearer control frame sent by the first device, where the PPDU includes a Data field, and the Data field includes a SERVICE domain and a PSDU. The field and tail padding portion, the SERVICE field includes a first color, the PSDU field includes a control frame, and the tail padding portion includes a check field, which may be, for example, a parity code, a cyclic redundancy code, or the like. The first color is used to identify the BSS to which the first device belongs, and the check field is used by the receiving end to verify whether the first color is received correctly.

Then, the second device determines whether the first Color is received correctly based on the check field. If the first color is received correctly, the second device determines whether the first color and the pre-stored second color are the same, wherein the second color is used to identify the BSS to which the second device belongs. If the first Color and the second Color are the same, the second device determines that the control frame is from the BSS to which the second device belongs. If the first Color and the second Color are not the same, the second device determines that the control frame is from the BSS to which the non-second device belongs. Therefore, the second device may perform different operations according to different BSSs of the control frame. For example, if the control frame is from the BSS to which the second device belongs, the second device may set intra according to the duration carried by the control frame. NAV, but does not affect regular-NAV, or the second device releases intra-NAV according to the CF-End carried by the control frame, but does not affect regular-NAV. And the second device through the check field can verify whether the corresponding first color is received correctly. The setting of the check field can improve the reliability of the transmitted Color, and the check field is set in the tail padding part to avoid increasing the transmission overhead.

In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective, avoiding interference, and increasing Equipment signal transmission opportunities. And set Color to the tail padding part of the PPDU or SERVICE The domain makes the PPDU feature backward compatibility and transmission overhead.

With reference to the second aspect of the embodiments of the present application, in a first implementation manner of the second aspect of the embodiments of the present application, the tail padding portion includes the first tail information Tail, the check field, and the second Tail in sequence, and the first Tail is used. To improve the BCC decoding performance of the SERVICE and PSDU parts at the receiving end, the second Tail is used to improve the BCC decoding performance of the check field on the receiving end.

With reference to the second aspect of the embodiment of the present application or the first implementation manner of the second aspect, in a second implementation manner of the second aspect of the embodiment of the present application, the PPDU further includes a presence indication, where the presence indication is used to indicate that the PPDU is included First Color. Before the second device determines whether the first color and the pre-stored second color are the same, the method of the implementation manner further includes: determining, by the second device, whether the PPDU includes the presence indication. If the PPDU includes a presence indication, the second device performs a step of determining whether the first Color and the pre-stored second Color are the same. By the prompt of the presence indication, the PHY of the second device determines whether it is necessary to identify the first Color, or whether the corresponding bit sequence of the first Color needs to be transmitted to the MAC layer for identification. This can improve the execution efficiency of the method of the present implementation.

A third aspect of the embodiments of the present application provides a method for sending a control frame, where the method includes: acquiring, by a first device, a color, where the color is used to identify a BSS to which the first device belongs. Then, the first device generates a PPDU carrying a control frame according to Color, the generated PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, and the control frame is included in the PSDU domain, and the tail padding portion includes the Color. Thus, the first device can transmit the PPDU to the second device.

In this way, because the PPDU includes Color, the second device can compare according to the Color on the PPDU and the Color of the BSS to which the second device belongs, so that the second device can determine the source of the control frame on the PPDU according to the comparison result.

In this way, after the PPDU sent by the sending device carries the Color, the device that accepts the PPDU compares the Colors, and the device can effectively distinguish the control frame sent in the PPDU format to perform corresponding operations according to the home BSS of the control frame. The PPDU format can be a legacy PPDU format. For example, a device that accepts a control frame can set a correct NAV according to the attribution of the control frame, so that the dual NAV mechanism is more effective, avoids interference, and increases equipment signal transmission opportunities. The color is set in the tail padding part of the PPDU, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

With reference to the third aspect of the embodiments of the present application, in a first implementation manner of the third aspect of the application, before the first device sends the PPDU to the second device, the method further includes: the first device generates a check according to the color. The field, the check field is used by the receiving end to verify whether Color is received correctly; the check field can be generated according to Color by an algorithm, and the check field has various forms, such as a cyclic redundancy coded CRC, a parity field, and the like. Therefore, the first device generates the PPDU carrying the control frame according to the color, and the first device generates the PPDU carrying the control frame according to the Color and the check field, and the tail padding portion of the PPDU includes the check field. In this way, the device receiving the PPDU can verify whether the Color is received correctly according to the check field, which improves the transmission reliability of the Color.

With reference to the first implementation manner of the third aspect of the embodiment of the present application, in the second implementation manner of the third aspect of the embodiment of the present application, the tail padding part further includes a tail information Tail, and the Tail is used to improve the BCC translation of the receiving end. Code performance. The Color and Check fields have various specific setting positions in the PPDU. For example, the Color and Check fields are located after the Tail, so that the padding bits after the Tail can be fully utilized, and the Tail is not affected. Or, Color and check word Before the segment is located before the Tail, the decoder does not use the known sequence of Tail for auxiliary decoding. The Tail is set such that it does not affect the decoding performance of the receiving end, and can also ensure the effective transmission of the first Color and the check field.

With reference to the third aspect of the embodiment of the present application, or the first or second implementation manner of the third aspect, in the third implementation manner of the third aspect of the embodiment of the present application, the end of the tail-filling portion further includes the remaining The padding Pad, Pad is an all-zero sequence. In the tail padding part, after the Color is filled or the Color and Check fields are filled, when the remaining padding bits remain, since the original padding bits Pad bits are all zero sequences, the remaining padding bits Pad are set to the all-zero sequence, which can be reduced. For the modification of the tail-filled part, when the Pad is a known sequence at the transmitting and receiving ends, the receiving end can decode the Pad as a Tail, which is beneficial to increase the correct probability of decoding the data tail bits.

With reference to the third aspect of the embodiments of the present application, in a fourth implementation manner of the third aspect of the embodiments of the present application, before the first device sends the PPDU to the second device, the method of the implementation manner further includes: the first device according to the first device Color generates a check field. The first device generates a PPDU carrying a control frame according to the color, where the first device generates a PPDU carrying a control frame according to the Color and the check field, where the tail padding portion of the PPDU further includes a check field, and in the tail padding part, the check The field and Color are located after the tail information Tail, and Color is located at the end of the tail padding portion. Tail is used to improve the BCC decoding performance of the receiving end. Thus, at the receiving end, Color can be verified to be correctly received according to the check field. Then, the first device performs BCC encoding on the part before the Tail and the Tail in the Data domain, and performs Tail-biting BCC encoding on the part after the Tail in the Data domain. In order to improve the transmission reliability of the Data domain, and by using Tail-biting BCC encoding, the tail information corresponding to Color and CRC can be reduced, so that the tail padding portion does not need to fill too much data.

With reference to the third aspect of the embodiments of the present application, and the first or second implementation manner of the third aspect, in a fifth implementation manner of the third aspect of the embodiment of the present application, the PPDU further includes a presence indication, the existence The indication is used to indicate that the PPDU includes Color. The presence indicator can assist the receiving end to determine whether the PPDU includes Color, so that the PHY of the second device accepting the PPDU determines whether it is necessary to identify the first Color, or whether the corresponding bit sequence of the first Color needs to be transmitted to the MAC layer for performing. Identification. Thereby improving the efficiency of execution of the receiving end.

A fourth aspect of the embodiments of the present application provides a method for sending a control frame, where the method includes: acquiring, by a first device, a color, where the color is used to identify a BSS to which the first device belongs. Then, the first device generates a check field according to Color, and the check field is used by the receiving end to verify whether Color is correctly received, and the check field may be, for example, a parity code, a cyclic redundancy code, or the like. The first device generates a PPDU carrying a control frame according to a Color and a check field, where the PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding portion, the SERVICE field includes a Color, the PSDU field includes a control frame, and the tail padding portion includes Check the field. Thus, the first device can transmit the PPDU to the second device.

In this way, the second device can compare according to the Color on the PPDU and the Color of the BSS to which the second device belongs, so that the second device can determine the source of the control frame on the PPDU. And the second device through the check field can verify whether the corresponding first color is received correctly. The setting of the check field can improve the reliability of the transmitted Color, and the check field is set in the tail padding part to avoid increasing the transmission overhead. By comparing Color, the device accepting the PPDU can effectively distinguish the control frame sent in the PPDU format to perform the corresponding operation according to the home BSS of the control frame. The PPDU format may be, for example, a legacy PPDU format. For example, a device that accepts a PPDU can set a correct NAV according to the comparison result of Color, so that the dual NAV mechanism is more effective, avoids interference, and increases device signal transmission. opportunity. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

With reference to the fourth aspect of the embodiments of the present application, in a first implementation manner of the fourth aspect of the embodiments of the present application, the tail padding part includes the first tail information Tail, the check field, and the second Tail, and the first Tail is used. To improve the BCC decoding performance of the SERVICE and PSDU parts at the receiving end, the second Tail is used to improve the BCC decoding performance of the check field on the receiving end.

With reference to the fourth aspect of the embodiment of the present application or the first implementation manner of the fourth aspect, in a second implementation manner of the fourth aspect of the embodiment of the present application, the PPDU further includes a presence indication, where the presence indication is used to indicate that the PPDU is included Color. In this way, the presence indicator can assist the receiving end to determine whether the PPDU includes Color, so that the PHY of the second device determines whether it is necessary to identify the first Color, or whether the corresponding bit sequence of the first Color needs to be transmitted to the MAC layer for identification. Thereby improving the efficiency of the method of performing the present implementation at the receiving end.

A fifth aspect of the embodiments of the present application provides a device for determining a BSS attribution, where the device has the function of determining a second device to which a BSS belongs in the foregoing method. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. The device is a second device.

In a possible implementation, the determining the device to which the BSS belongs includes:

The acquiring unit is configured to obtain a physical layer convergence process protocol data unit PPDU of the bearer control frame sent by the first device, where the PPDU includes a Data field, and the Data field includes a physical layer aggregation process service data unit PSDU field and a tail padding part, and the PSDU domain includes a control a frame, the tail padding portion includes a first color, and the first color is used to identify a basic service set BSS to which the first device belongs;

a first determining unit, configured to determine whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs;

And a determining unit, configured to determine that the control frame is from the BSS to which the second device belongs if the first color and the second color are the same.

In another possible implementation manner, the determining the device to which the BSS belongs includes:

Transceiver

The transceiver performs the following actions: acquiring a physical layer convergence process protocol data unit PPDU of the bearer control frame sent by the first device, where the PPDU includes a Data field, and the Data field includes a physical layer convergence process service data unit PSDU field and a tail padding part, and a PSDU domain. Including a control frame, the tail padding portion includes a first color, and the first color is used to identify a basic service set BSS to which the first device belongs;

The processor performs the following actions: determining whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs;

The processor performs the following actions: if the first Color and the second Color are the same, it is determined that the control frame is from the BSS to which the second device belongs.

In a sixth aspect, an embodiment of the present application provides a computer storage medium, where the program storage code stores a program code, where the program code is used to indicate that the method of the foregoing first aspect is performed.

A seventh aspect of the embodiments of the present application provides a device for determining a BSS attribution, where the device has the function of determining a second device to which a BSS belongs in the foregoing method. This function can be implemented in hardware or executed by hardware. achieve. The hardware or software includes one or more modules corresponding to the functions described above. The device is a second device.

An acquiring unit, configured to obtain a PPDU of a bearer control frame sent by the first device, where the PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding part, the SERVICE field includes a first Color, and the PSDU field includes a control frame, and a tail padding The part includes a check field, the first color is used to identify the BSS to which the first device belongs, and the check field is used by the receiving end to verify whether the first color is received correctly;

a first determining unit, configured to determine, according to the check field, whether the first color is received correctly;

a second determining unit, configured to determine whether the first color and the pre-stored second color are the same if the first color is received correctly, and the second color is used to identify the BSS to which the second device belongs;

Transceiver

The transceiver performs the following actions: acquiring a PPDU of a bearer control frame sent by the first device, where the PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding part, the SERVICE field includes a first color, and the PSDU field includes a control frame. The tail padding portion includes a check field, the first color is used to identify the BSS to which the first device belongs, and the check field is used by the receiving end to verify whether the first color is received correctly;

The processor performs the following actions: determining whether the first color is received correctly based on the check field;

The processor performs the following actions: if the first color is received correctly, determining whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs;

In an eighth aspect, an embodiment of the present application provides a computer storage medium, where the program storage code stores a program code, where the program code is used to indicate that the method of the second aspect is performed.

A ninth aspect of the embodiments of the present application provides an apparatus for transmitting a control frame, where the apparatus has the function of a first device that transmits a control frame in the foregoing method. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. The device is a first device.

An obtaining unit, configured to acquire a color, and the color is used to identify the BSS to which the first device belongs;

a generating unit, configured to generate a PPDU carrying a control frame according to the color, the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a Color;

And a sending unit, configured to send a PPDU to the second device.

Transceiver

The transceiver performs the following actions: acquiring Color, and Color is used to identify the BSS to which the first device belongs;

The processor performs the following actions: generating a PPDU carrying a control frame according to Color, the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a Color;

The transceiver performs the following actions: transmitting a PPDU to the second device.

In a tenth aspect, an embodiment of the present application provides a computer storage medium, where the program storage code stores a program code, where the program code is used to indicate that the method of the foregoing third aspect is performed.

An eleventh aspect of the embodiments of the present application provides an apparatus for transmitting a control frame, where the apparatus has the function of a first device that sends a control frame in the foregoing method. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. The device is a first device.

a field generating unit, configured to generate a check field according to the Color, where the check field is used by the receiving end to verify whether the Color is received correctly;

And a generating unit, configured to generate a PPDU carrying a control frame according to the Color and the check field, where the PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding part, the SERVICE field includes a Color, and the PSDU field includes a control frame and a tail padding part. Including the check field;

And a sending unit, configured to send a PPDU to the second device.

Transceiver

The processor performs the following actions: generating a check field according to Color, and the check field is used by the receiving end to verify whether Color is received correctly;

The processor performs the following actions: generating a PPDU carrying a control frame according to a Color and a check field, the PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding portion, the SERVICE field includes a Color, and the PSDU field includes a control frame and a tail. The padding portion includes a check field;

According to a twelfth aspect, the embodiment of the present application provides a computer storage medium, where the program storage code stores a program code, and the program code is used to indicate that the method of the foregoing fourth aspect is performed.

A thirteenth aspect of the present application provides a method for determining a BSS attribution of a received control frame, the method comprising:

The first device receives the PPDU of the bearer control frame sent by the second device, where the PPDU includes a Data field, the Data field includes a SERVICE domain, a PSDU, and a tail padding part, where the tail padding part includes the BSS of the second device. Color and first tail information Tail, the PSDU includes the control frame, and the PSDU is located before the tail padding portion and after the SERVICE field;

The first device determines, according to the Color, whether the control frame is from a BSS to which the first device belongs.

By carrying Color in the Pad bits of the legacy PPDU, the third-party new device can obtain the Color, and determine whether the PPDU is from the BSS of the third-party new device according to Color, thereby setting the correct NAV, so that the dual NAV mechanism is more effective; At the same time, since the Color is carried in the Pad bits, the third-party legacy device does not affect the reception of the PSDU part in the PPDU.

With reference to the thirteenth aspect of the embodiment of the present application, in a first implementation manner of the thirteenth aspect of the embodiment of the present application, After the first tail information Tail is followed by the PSDU, the first device receives the PPDU of the bearer control frame sent by the second device, and includes:

Decoding, by the first device, the BCC of the Data domain; or

The first device performs BCC decoding on the SERVICE domain, the PSDU, and the first tail information Tail, and performs Tail-biting decoding on a portion of the Data domain that is located after the first tail information Tail. .

The location of the Tail follows the PSDU, which is exactly the same as the legacy PPDU, so that the introduction of Color has no effect on the third-party legacy device receiving the PSDU part. The entire Data field adopts BCC coding, which is beneficial to simplify the processing of the transceiver. However, due to the limited capacity of the Pad bits, the reliability of the Color is reduced. The Pad bits part uses the Tail-biting BCC code, which can effectively improve the reliability of the Color, but the transceiver. The complexity increases.

With reference to the thirteenth aspect of the embodiments of the present application, in a second implementation manner of the thirteenth aspect of the embodiments of the present application, after the first tail information Tail is located in the color, the first device receives the The PPDU of the bearer control frame sent by the second device includes:

The first device performs BCC decoding on the Data domain.

After Tail is moved to Color, it may affect the reception of the PSDU part by the third party legacy device, but Color has the same reliability as the PSDU part.

In a third implementation manner of the thirteenth aspect of the embodiment of the present application, A first check field is included, the first check field being at least a checksum of the Color.

The introduction of the first check field enables the correct reception of Color to be verified.

With reference to the thirteenth aspect of the embodiment of the present application or the first to third implementation manners of the thirteenth aspect, in the fourth implementation manner of the thirteenth aspect of the embodiment of the present application, The PPDU includes a color presence indication for indicating that the color is included in the PPDU.

The introduction of the Color presence indication enables the third-party new device to determine whether the current PPDU contains Color, and thereby determine whether to obtain the Color from the Pad bits.

With reference to the fourth implementation manner of the thirteenth aspect of the embodiments of the present application, in a fifth implementation manner of the thirteenth aspect, the PPDU further includes a preamble domain Preamble, and the preamble domain Preamble Before the Data field, the Color presence indication is located in the Preamble Domain Preamble.

The Color presence indicator is placed in the Preamble, so that the third-party new device can determine whether the current PPDU includes the Color in the PHY, and then determine whether to report the Color to the MAC layer. This simplifies MAC layer processing.

With reference to the fourth implementation manner of the thirteenth aspect of the embodiment of the present application, in a sixth implementation manner of the thirteenth aspect of the embodiment of the present application, the color presence indication is located in the SERVICE domain, and the SERVICE is displayed. The domain includes a second check field, which is a check indicating the presence of the Color.

The SERVICE field is used to carry the Color presence indication and the second check field, so that the third-party new device can determine whether the current PPDU includes the Color in the PHY, and then determine whether to report the Color to the MAC layer. This simplifies MAC layer processing.

With reference to the fourth implementation manner of the thirteenth aspect of the embodiment of the present application, in the thirteenth aspect of the embodiment of the present application In a seventh implementation manner, the PSDU includes a frame control field, and the Color presence indication is located in the frame control domain.

The Color presence indicator is placed in the MAC layer frame control domain, so that third-party new devices do not need to make any judgment in the PHY. Simply pass the bits in the Pad bits and/or SERVICE to the MAC layer, which simplifies the PHY layer processing. .

With reference to the fourth implementation manner of the thirteenth aspect of the embodiments of the present application, in the eighth implementation manner of the thirteenth aspect of the embodiments of the present application, the PSDU includes a receiving address field, and the color presence indication is located at the The receiving address field.

The Color presence indicator is placed in the MAC layer RA domain, so that third-party new devices do not need to make any judgment in the PHY, and only need to pass the bits in the Pad bits and/or SERVICE to the MAC layer, which simplifies the PHY layer processing.

With reference to the thirteenth aspect of the embodiments of the present application, in a ninth implementation manner of the thirteenth aspect of the present application, the first device determines, according to the color, whether the control frame is from the first The BSS to which the device belongs includes:

When the color is the same as the color of the BSS to which the first device belongs, the first device determines that the control frame is from a BSS to which the first device belongs.

The color of the first device of the Color field in the received PPDU is compared, and whether the two are the same determines whether the PPDU is from the BSS of the first device.

A fourteenth aspect of the present application provides a method for determining a BSS attribution of a received control frame, the method comprising:

The first device receives the PPDU of the bearer control frame sent by the second device, where the PPDU includes a Data field, where the Data field includes a SERVICE domain, a PSDU, and a tail padding part, where the SERVICE domain includes a color of the BSS to which the second device belongs. The tail padding portion includes a first tail information Tail, a first check field, and a second tail information Tail, the first check field is at least a check for the Color, and the PSDU includes the control frame And the PSDU is located before the tail padding part, after the SERVICE field, the first tail information Tail immediately after the PSDU, the first check field is located after the first tail information Tail, Before the second tail information Tail;

The SERVICE field carries Color and the Pad bits carry Color corresponding to the first check field, and the second tail information Tail guarantees the reliability of the first check field, so that Color has the same reliability as the PSDU.

With reference to the fourteenth aspect of the embodiments of the present application, in a first implementation manner of the fourteenth aspect of the present application, the PPDU includes a color presence indication, and is used to indicate that the color is included in the PPDU.

With reference to the first implementation manner of the fourteenth aspect of the embodiments of the present application, in the second implementation manner of the fourteenth aspect of the embodiments of the present application, the PPDU further includes a preamble domain Preamble, and the preamble domain Preamble Before the Data field, the Color presence indication is located in the Preamble Domain Preamble.

With reference to the first implementation of the fourteenth aspect of the embodiments of the present application, in a third implementation manner of the fourteenth aspect of the embodiments of the present application, the color presence indication is located in the SERVICE domain, where the a check field at least Is a check for the presence of the Color and the Color.

The SERVICE field is used to carry the Color presence indication, and is verified based on the first check field, so that the third-party new device can determine whether the current PPDU includes the Color in the PHY, and then determine whether to report to the MAC layer. Color. This simplifies MAC layer processing.

With reference to the first implementation of the fourteenth aspect of the embodiments of the present application, in a fourth implementation manner of the fourteenth aspect of the embodiments of the present application, the PSDU includes a frame control field, and the color presence indication is located at the Said in the frame control domain.

With reference to the first implementation of the fourteenth aspect of the embodiments of the present application, in a fifth implementation manner of the fourteenth aspect of the embodiments of the present application, the PSDU includes a receiving address field, and the color presence indication is located at the The receiving address field.

With reference to the fourteenth aspect of the embodiments of the present application, in a sixth implementation manner of the fourteenth aspect of the present application, the first device determines, according to the color, whether the control frame is from the first The BSS to which the device belongs includes:

A fifteenth aspect of the present application provides a method for transmitting a PPDU carrying a control frame, the method comprising:

The second device generates a PPDU for carrying a control frame, where the PPDU includes a Data field, the Data field includes a SERVICE domain, a PSDU, and a tail padding portion, and the tail padding portion includes a Color and a BSS of the BSS to which the second device belongs. a tail information, the PSDU includes the control frame, and the PSDU is located before the tail padding portion and after the SERVICE field;

The second device sends the PPDU.

With reference to the fifteenth aspect of the embodiments of the present application, in a first implementation manner of the fifteenth aspect of the embodiments of the present application, after the first tail information Tail is followed by the PSDU, the second device generates PPDU for carrying control frames, including:

The second device performs BCC encoding on the Data domain; or

The second device performs BCC encoding on the SERVICE domain, the PSDU, and the first tail information Tail, and performs Tail-biting encoding on a portion of the Data domain that is located after the first tail information Tail.

The location of the Tail follows the PSDU, which is exactly the same as the legacy PPDU, so that the introduction of Color has no effect on the third-party legacy device receiving the PSDU part. The entire Data domain uses BCC encoding, which is beneficial to simplify the processing of the transceiver. However, due to the limited carrying capacity of the Pad bits, the reliability of the Color is reduced. The Pad bits part adopts the Tail-biting BCC code, which can effectively improve the reliability of the Color, but the complexity of the transceiver end is increased.

With reference to the fifteenth aspect of the embodiments of the present application, in a second implementation manner of the fifteenth aspect of the embodiments of the present application, the first tail information Tail is located after the color, and the second device is generated for A PPDU carrying a control frame, including:

The second device performs BCC encoding on the Data domain.

With reference to the fifteenth aspect of the embodiment of the present application or the first or second implementation manner of the fifteenth aspect, in the third implementation manner of the fifteenth aspect of the embodiment of the present application, the tail filling portion is further A first check field is included, the first check field being at least a checksum of the Color.

With reference to the fifteenth aspect of the embodiment of the present application or the first to third implementation manners of the fifteenth aspect, in the fourth implementation manner of the fifteenth aspect of the embodiment of the present application, The PPDU includes a color presence indication for indicating that the color is included in the PPDU.

With reference to the fourth implementation manner of the fifteenth aspect of the embodiments of the present application, in a fifth implementation manner of the fifteenth aspect of the application, the PPDU further includes a preamble domain Preamble, and the preamble domain Preamble Before the Data field, the Color presence indication is located in the Preamble Domain Preamble.

With reference to the fourth implementation manner of the fifteenth aspect of the embodiment of the present application, in a sixth implementation manner of the fifteenth aspect of the embodiment of the present application, the color presence indication is located in the SERVICE domain, and the SERVICE is displayed. The domain includes a second check field, which is a check indicating the presence of the Color.

With reference to the fourth implementation manner of the fifteenth aspect of the embodiments of the present application, in a seventh implementation manner of the fifteenth aspect of the embodiments of the present application, the PSDU includes a frame control domain, and the color presence indication is located at the location Said in the frame control domain.

With reference to the fourth implementation manner of the fifteenth aspect of the embodiment of the present application, in the eighth implementation manner of the fifteenth aspect of the embodiments of the present application, the PSDU includes a receiving address field, and the color presence indication is located at the The receiving address field.

The Color presence indicator is placed in the MAC layer RA domain, so that third-party new devices do not need to make any judgment in the PHY. Simply pass the bits in the Pad bits and/or SERVICE to the MAC layer, which simplifies the PHY layer processing.

A sixteenth aspect of the present application provides a method for transmitting a PPDU carrying a control frame, the method comprising:

The second device generates a PPDU for carrying a control frame, where the PPDU includes a Data field, the Data field includes a SERVICE domain, a PSDU, and a tail padding portion, and the SERVICE domain includes a Color of a BSS to which the second device belongs, The tail padding portion includes a first tail information Tail, a first check field, and a second tail information Tail, the first check field is at least a check for the Color, and the PSDU includes the control frame, and The PSDU is located before the tail padding part, after the SERVICE field, the first tail information Tail is immediately after the PSDU, and the first check field is located after the first tail information Tail, the second tail Before the information Tail;

The second device sends the PPDU.

In a first implementation manner of the sixteenth aspect of the present application, the PPDU includes a color presence indication, and is used to indicate that the color is included in the PPDU.

With reference to the first implementation manner of the sixteenth aspect of the present application, in the second implementation manner of the sixteenth aspect of the present application, the PPDU further includes a preamble domain Preamble, where the preamble domain Preamble is located in the data domain. Previously, the Color presence indication is located in the Preamble Domain Preamble.

In conjunction with the first implementation of the sixteenth aspect of the present application, in a third implementation manner of the sixteenth aspect of the present application, the color presence indication is located in the SERVICE domain, and the first check field is at least Is a check for the presence of the Color and the Color.

In a fourth implementation manner of the sixteenth aspect of the present application, the PSDU includes a frame control field, where the Color presence indication is located in the frame control domain. .

In a fifth implementation manner of the sixteenth aspect of the present application, the PSDU includes a receiving address field, where the Color presence indication is located in the receiving address field. .

A seventeenth aspect of the present application provides an apparatus for determining a BSS attribution of a received control frame, the apparatus comprising:

a receiving module, configured to receive a PPDU of a bearer control frame sent by the second device, where the PPDU includes a Data field, the Data field includes a SERVICE domain, a PSDU, and a tail padding part, where the tail padding part includes the second device a color of the BSS and a first tail information Tail, the PSDU includes the control frame, and the PSDU is located before the tail padding portion and after the SERVICE field;

a decoding module, configured to decode the Data field of the PPDU to obtain the Color;

And a determining module, configured to determine, according to the Color, whether the control frame is from a BSS to which the device belongs.

An eighteenth aspect of the present application provides an apparatus for determining a BSS attribution of a received control frame, the apparatus comprising:

a receiving module, configured to receive a PPDU of a bearer control frame sent by the second device, where the PPDU includes a Data field, where the Data field includes a SERVICE domain, a PSDU, and a tail padding part, where the SERVICE domain includes a BSS to which the second device belongs. Color, the tail padding portion includes a first tail information Tail, a first check field, and a second tail information Tail, the first check field is at least a check for the Color, and the PSDU includes the Controlling a frame, and the PSDU is located before the tail padding portion and after the SERVICE field, the first tail information Tail immediately after the PSDU, and the first check field is located after the first tail information Tail, Before the second tail information Tail;

The determining module determines, according to the Color, whether the control frame is from a BSS to which the device belongs.

A nineteenth aspect of the present application provides an apparatus for transmitting a PPDU carrying a control frame, the apparatus comprising:

a generating module, configured to generate a PPDU carrying a control frame, where the PPDU includes a Data field, where the Data field includes a SERVICE field, a PSDU, and a tail padding portion, where the tail padding portion includes a Color and a first tail of the BSS to which the device belongs Information Tail, the PSDU includes the control frame, and the PSDU is located before the tail padding portion and after the SERVICE field;

An encoding module, configured to encode the Data field of the PPDU;

And a sending module, configured to send the PPDU.

A twentieth aspect of the present application provides an apparatus for transmitting a PPDU carrying a control frame, the apparatus comprising:

a generating module, configured to generate a PPDU carrying a control frame, where the PPDU includes a Data field, where the Data field includes a SERVICE domain, a PSDU, and a tail padding portion, where the SERVICE domain includes a Color of a BSS to which the device belongs, and the tail padding The part includes a first tail information Tail, a first check field, and a second tail information Tail, the first check field to Less is the check of the Color, the PSDU includes the control frame, and the PSDU is located before the tail padding part, after the SERVICE field, and the first tail information Tail is immediately after the PSDU The first check field is located after the first tail information Tail and before the second tail information Tail;

And a sending module, configured to send the PPDU.

The SERVICE field carries Color and the Pad bits carry Color corresponding to the first check field, and the second tail information Tail guarantees the reliability of the first check field, so that Color has the same reliability as the PSDU. Yet another aspect of the present application provides a computer readable storage medium having instructions stored therein that, when executed on a computer, cause the computer to perform the methods described in the above aspects.

Yet another aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods described in the various aspects above.

In the technical solution provided by the embodiment of the present invention, after the first device acquires the first color that is used to identify the BSS to which the first device belongs, the first device generates a PPDU of the bearer control frame according to the first color, where the PPDU includes the Data field. The Data field includes a PSDU field and a tail padding portion, and the PSDU field includes a control frame, a tail padding portion, or a SERVICE field of the Data field includes a first color, and then the first device sends a PPDU to the second device, so that the second device obtains the first A PPDU carrying a control frame sent by a device. Then, the second device determines whether the first color and the pre-stored second color are the same, the second color is used to identify the BSS to which the second device belongs; if the first color and the second color are the same, the second device determines the control The frame is from the BSS to which the second device belongs; otherwise, the control frame of the PPDU is determined to be from the BSS to which the non-second device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective, avoiding interference, and increasing Equipment signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

DRAWINGS

FIG. 1 is a network architecture diagram of a communication system according to an embodiment of the present application;

2 is a schematic diagram of a virtual carrier application RTS/CTS mechanism;

3 is a schematic diagram of four PPDU structures provided by the prior art;

4 is a schematic diagram of a Legacy PPDU format provided by the prior art;

FIG. 5a is a schematic diagram of a MAC frame format of an RTS provided by the prior art; FIG.

FIG. 5b is a schematic diagram of a MAC frame format of a CTS/ACK provided by the prior art; FIG.

6a is a schematic structural diagram of an RTS-based Control Wrapper frame provided by the prior art;

6b is a schematic structural diagram of a CTS/ACK-based Control Wrapper frame provided by the prior art;

FIG. 7 is a flowchart of a method for determining a BSS attribution according to an embodiment of the present application;

8 is a schematic structural diagram of a PPDU involved in the method in the embodiment shown in FIG. 7;

9a is a partial structural diagram of a PPDU involved in the method of the embodiment shown in FIG. 7;

9b is a schematic structural diagram of another part of a PPDU involved in the method of the embodiment shown in FIG. 7;

10 is a schematic diagram of a BCC encoding performed by a transmitting device involved in the method of the embodiment shown in FIG. 7;

FIG. 11 is a schematic structural diagram of a PPDU involved in a method for determining a BSS attribution according to an embodiment of the present disclosure;

12 is a flowchart of a method for determining a BSS attribution corresponding to the structure of the PPDU of FIG. 11;

FIG. 13 is a schematic structural diagram of a PPDU involved in a method for determining a BSS attribution according to an embodiment of the present disclosure;

14 is a comparison diagram of a structure of a PPDU and a structure of a Legacy PPDU involved in a method for determining a BSS attribution according to an embodiment of the present disclosure;

15 is a flowchart of a method for determining a BSS attribution corresponding to the structure of the PPDU of FIG. 14;

FIG. 16 is a schematic structural diagram of a PPDU involved in a method for determining a BSS attribution according to an embodiment of the present disclosure;

17 is a flowchart of a method for determining a BSS attribution corresponding to the structure of the PPDU of FIG. 16;

FIG. 18 is a schematic structural diagram of an L-SIG including a presence indication according to an embodiment of the present application;

FIG. 19 is a schematic structural diagram of a Frame Control field including a presence indication according to an embodiment of the present disclosure;

FIG. 20 is a schematic structural diagram of a SERVICE domain including a presence indication according to an embodiment of the present disclosure;

FIG. 21 is a schematic structural diagram of an RA domain including a presence indication according to an embodiment of the present disclosure;

FIG. 22 is a schematic structural diagram of a device for determining a BSS attribution according to an embodiment of the present disclosure;

FIG. 23 is a schematic structural diagram of hardware of a device according to an embodiment of the present disclosure;

FIG. 24 is a schematic structural diagram of a device for determining a BSS attribution according to an embodiment of the present disclosure;

FIG. 25 is a schematic structural diagram of an apparatus for sending a control frame according to an embodiment of the present disclosure;

FIG. 26 is a schematic structural diagram of an apparatus for sending a control frame according to an embodiment of the present disclosure.

detailed description

The terms "first", "second", "third", "fourth", etc. (if present) in the specification and claims of the present invention and the above figures are used to distinguish similar objects without having to use To describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

FIG. 1 is a network architecture diagram of a communication system according to an embodiment of the present disclosure. The communication system may be used to perform a method for determining a BSS attribution and a method for transmitting a control frame according to an embodiment of the present application. As shown in FIG. 1 , the network architecture includes an access point (AP) 101, an AP 102, a station (Station, STA) 111, a STA 112, and a STA 113.

Among them, STA 111 and STA 112 are associated with AP 101, STA 113 is associated with AP 102, and STA 112 can receive frames from AP 101 and AP 102. STA 111 and STA 112 belong to the same BSS as AP1, and STA 113 and AP 102 belong to the same BSS. A BSS is a cell, a system consisting of an AP and its associated STAs.

With the evolution of the Wireless Local Area Network (WLAN) standard, the current Institute of Electrical and Electronics Engineers (IEEE) 802.11 working group has begun research and development of the next generation of WiFi standards. The next-generation Wireless Fidelity (WiFi) standard is called High Efficiency WLAN (HEW), project code 802.11ax, and the goal is to increase the system capacity to more than 10 Gbps, paying special attention to the outdoor deployment and high-density deployment of WiFi devices. Kind of scene. HEW Jane Called HE.

In the case of high-density deployments, transmission protection mechanisms are becoming increasingly important. The 802.11 standard uses the Virtual Carrier Sense mechanism for transmission protection. In the virtual carrier sensing mechanism, the sender and the receiver carry a transmission duration value (Duration) in the transmission frame, indicating the remaining duration of the current transmission process, thereby forming protection for the subsequent transmission duration. When other devices receive the transmission frame of the sender or receiver, they will set their own Network Allocation Vector (NAV) timer according to the transmission duration value carried in it. Thereafter, the NAV is decremented. Before the NAV timer is decremented to zero, even if the wireless channel is detected to be idle, the device cannot actively transmit data, thereby avoiding interference with other ongoing transmissions.

A typical virtual carrier application is the RTS/CTS mechanism, as shown in Figure 2. The source Source carries the time from the end of the RTS frame to the end of the ACK in the Duration field of the transmitted RTS frame. If the destination destination receives the RTS frame correctly, the time between the end of the CTS and the end of the ACK is carried in the response frame CTS. Other devices set their own NAV according to the Duration field in the RTS/CTS frame. If the NAV of other devices has been set, the NAV and Duration values must be compared first when the new Duration field is received. Only when the Duration value is greater than the current NAV value, you need to reset the NAV with the Duration value.

Of course, the Duration field is not only included in the RTS/CTS frame, but is included in all control, management, and data frames, so it can be used to set the NAV.

However, the NAV set according to the above-mentioned carrier sensing mechanism has a problem of being released by the contention-free end (CF-End) error, because the device receives the CF-End sent by any device and resets its own NAV. The NAV timer will be cleared.

As shown in FIG. 1, STA 111 and STA 112 are associated with AP 101, STA 113 is associated with AP 102, and STA 112 can receive frames from AP 101 and AP 102. If the NAV of the STA 112 is set according to the Duration of the frame from the AP 101, when the STA 112 receives the CF-End from the AP 102, the NAV is reset, and the contention channel is started and transmitted to the AP 101, which occurs with the transmission of the STA 111 to the AP 101 at the AP 101. Conversely, if the NAV of the STA 112 is set according to the Duration of the frame from the AP 102, the STA 112 resets the NAV when receiving the CF-End from the AP 101, and starts to contend for the channel and transmits to the AP 101, which is transmitted with the STA 113 to the AP 102. A collision occurs at AP102. The root cause of the above conflict is that the NAV set by the STA based on the frame of one BSS is released by the CF-End from another BSS, and the transmission protection is not achieved. A BSS is a cell, a system consisting of an AP and its associated STAs.

In response to the above problem, a dual NAV mechanism is proposed in 802.11ax. In the dual NAV mechanism, the NAV maintained by each device includes both intra-NAV (internal NAV) and regular-NAV (conventional NAV). When the device receives a frame from the BSS (non-CF-End), it sets the intra-NAV based on the Duration carried in it, but does not affect the regular-NAV; when the device receives an overlay basic service set (Overlapping Basic SERVICE) Set

When the frame of the OBSS is not (CF-End) or the frame to which the BSS belongs cannot be determined, the regular-NAV is set based on the Duration carried therein, but the intra-NAV is not affected. Accordingly, when the device receives a CF-End from the BSS, only the intra-NAV is released; when the device receives a CF-End from the OBSS, only the regular-NAV is released. In this way, the problem that the NAV set according to the frame from one BSS is released by the CF-End error from another BSS is avoided, thereby avoiding collision. Normally, determining whether a frame is a BSS frame or not is based on the MAC portion of the frame. If the value of the included BSSID is matched with the BSSID of the BSS to which the device belongs, it is considered to be the BSS frame. The BSSID is usually 48 bits, which is generally the same as the address of the AP, but it can be different.

For example, when the STA 112 receives the frame sent by the AP 101, the STA 112 may determine, according to the BSSID in the frame, that the frame is from the BSS to which the STA 112 belongs, so that the STA 112 may set the intra-NAV according to the Duration carried in the frame, but does not affect the regular- NAV. When the STA 112 receives the frame sent by the AP 102, the STA 112 may determine, according to the BSSID in the frame, that the frame is not from the BSS to which the STA 112 belongs, so that the STA 112 may set the regular-NAV according to the Duration carried in the frame, but does not affect the intra- NAV. In this way, the problem that the STA is released based on the CF-End of another BSS based on the frame setting of one BSS can be avoided. Thus, the purpose of transmission protection is achieved.

In order to cooperate with the above dual NAV mechanism, the HE-SIG-A of the physical headers of the four PPDU structures designed by 802.11ax includes Color (color) and TXOP Duration (transmission opportunity duration), as shown in FIG. BSS Color in 3. The color length is 6 bits, which is the short identifier of the BSS, which is equivalent to the simplified representation of the BSSID. Thus, the device can determine whether the frame is a BSS frame based on the physical header of the received frame (without solving the MAC part).

Among them, in different PPDU formats, the position of Color is slightly different. For example, in Single User (SU)/Extended Range (ER) PPDU, Color is located in B8-B13, and HE is Multi-User (Multiple). User, MU) The color of the PPDU is located in the B5-B10 bit. The color of a BSS is usually determined by the AP when it initializes the network, but can be modified at any time. The TXOP Duration is the aforementioned Duration, but it was previously placed in the MAC header (in Data in Figure 3), while 802.11ax is also carried in the physical header.

The physical head carries Color and Transmission Opportunity (TXOP) Duration, so that any device can determine the BSS attribution of the frame according to the physical header, and set the NAV according to the TXOP Duration without having to solve the MAC part, thereby saving power.

However, the BSSID may not be included in the MAC frame of some frames, and it cannot carry the Color through the physical header to indicate the attribution of the BSS.

The MAC frames in 802.11 can be divided into three categories: data frames, management frames, and control frames. The data frame and the management frame have at least three address domains, and at least one of the address domains carries a BSSID. However, control frames are not the case.

For example, the MAC header address field of a partial control frame may not contain a BSSID. As shown in Table 1, the current common control frames in the 802.11 standard of the 2.4/5 GHz band can be divided into two categories, such as PS-Poll and Trigger. The MAC header includes two address domains, RA and TA, and must have One address field is the BSSID. For frames such as RTS and CTS, the MAC header address field may not include the BSSID: for CTS and ACK frames, since there are only RA domains in the MAC header, when used for DL transmission and DLS/TDLS transmission, the RA domain is not The BSSID is included; for the RTS, BA, and BAR frames, there are two address domains, RA and TA, in the MAC header. When used for DLS/TDLS transmission, neither the RA domain nor the TA domain contain the BSSID. The DLS/TDLS transmission refers to the transmission between two STAs associated with the same AP. The RA domain and the TA domain are the addresses of the transmitting and receiving parties respectively, and obviously do not contain the BSSID. On the other hand, control frames such as RTS and CTS are mainly used for transmission protection, and legacy devices should also be able to receive. Therefore, these control frames cannot be transmitted in the HE PPDU format, but can only be transmitted using the legacy PPDU format. The BSS attribution is indicated by the physical header including Color. The so-called legacy PPDU format, that is, the OFDM-based PPDU format proposed by the 802.11a/g standard, is shown in FIG. 4, where the PSDU is a MAC frame. Legacy PPDUs are also known as non-HT PPDUs.

Table 1:

Since the BSS ID is not included in the MAC header of the RTS, CTS, ACK, BA, and BAR, and the color cannot be carried by the physical header, when the STA receives such a control frame and the address field does not include the BSSID of the BSS to which the STA belongs. The STA cannot determine whether this frame is a control frame from the BSS device. According to the current rule, the STA will update its regular-NAV using Duration in the frame, but the regular-NAV can only be released by the CF-End from the OBSS.

Referring to FIG. 1, it is assumed that the control frame is actually from the device AP101 in the BSS. When the STA 112 receives the CF-End from the BSS, the regular-NAV is not released, but since the MAC header of the frame does not include the BSSID, And the color cannot be transmitted by the physical header, and the STA 112 cannot determine whether the frame is a control frame from the BSS device, so that the SAT 112 releases the regular-NAV according to the control frame, which reduces the chance of the STA 112 being sent; when the STA receives the CF from the OBSS When -End, regular-NAV is released, which causes the STA to contend for the channel and send it to the AP, thereby causing interference to the ongoing transmission.

Obviously, when the STA receives a control frame that cannot determine the BSS attribution but actually comes from the BSS device and then sets the regular-NAV, the dual NAV mechanism is completely invalid, the problem that the NAV is released by mistake will occur, and the NAV may not be The situation of release, thereby causing interference to the ongoing transmission, or reducing the transmission opportunity of the STA.

For the problem that the BSS attribution of the control frame cannot be distinguished, the present application provides a method for enabling the device to effectively distinguish the control frame sent in the legacy PPDU format, thereby setting the correct NAV, so that the dual NAV mechanism is more effective and avoids interference. Added STA transmission opportunities with backward compatibility and constant transmission overhead.

The Legacy PPDU format is as shown in FIG. 4, which is composed of a preamble domain Preamble and a data Data field, and the Data domain includes a SERVICE domain, a PSDU, and a tail padding section. The PSDU is a MAC frame. In the device, the PSDU is generated by the MAC layer and transmitted to the physical layer (Physical Layer; PHY). The PHY adds a 2 bytes SERVICE field before the PSDU, and adds 6 bits of tail information (Tail) and possibly existing pad bits to the PSDU to form a Data field. Then, the PHY performs scrambling, Binary Convolutional Code (BCC) channel coding, interleaving, modulation, spatial mapping, and the like on the entire Data to form a processed Data field. Finally, add the L-Short Training Field (STF), the legacy (Legacy, L)-Long Training Field (LTF), and the L-Signal Domain (Signal) before the processed Data field. , SIG), forming a legacy PPDU. Among them, L-STF, L-LTF, L-SIG are called physical headers, also known as preamble domain Preamble, or old preamble domain L-preamble; Tail and Pad bits located after PSDU are also called tail-filled parts.

In the above generation process of the Legacy PPDU, the Tail is usually a 6-bit all-zero sequence, which is to improve the BCC decoding performance of the receiving end. Pad bits are also all zero sequences, which are used to make the length of the Data field an integer multiple of the number of valid bits per symbol (N _DBPS ). DBPS is Data Bits per OFDM Symbol (data bits per OFDM symbol). The so-called effective number of bits per symbol refers to the number of uncoded bits carried in each OFDM symbol. For example, an OFDM symbol consists of 48 subcarriers, using Binary Phase Shift Keying (BPSK) modulation, and the channel coding rate is 1/2, then N _DBPS = 48 × 1/2 = 24 bits; Quadrature Binary Phase Shift Keying (QPSK) modulation, code rate 3/4, then N _DBPS = 48 × 2 × 3 / 4 = 72 bits. Equation (1) is a process in which the PHY of the transmitting end calculates the Pad bit length (N _PAD ), where LENGTH is the PSDU length (ie, the MAC frame length, unit: bytes), and the MAC layer informs the PHY through the primitive. Obviously, the length of the Pad bits is also variable due to the variable value of LENGTH.

Formula 1:

N _SYM =Ceiling((16+8×LENGTH+6)/N _DBPS )

N _DATA =N _SYM ×N _DBPS

N _PAD =N _DATA -(16+8×LENGTH+6)

The difference from the data frame and the management frame is that the length of most control frames is relatively fixed. For the 8 Modulation and Coding Schemes (MCS) supported by the Legacy PPDU, these control frames are The length of the Pad bits is determinable. Table 2 shows the Pad bit lengths of the RTS frame and the CTS/ACK frame under various MCSs, where QAM is Quadrature Amplitude Modulation. The MAC frame format of the RTS and CTS is as shown in FIG. 5(a) and FIG. 5(b), and the ACK frame is identical to the MAC frame format of the CTS frame. In Table 2, R1 - R4 are the values of the RATE field in the L-SIG, indicating the MCS index; the four MCS in italics are mandatory MCS, and the other MCS are optional supported MCS. As can be seen from the last two columns in the table, regardless of the MCS, the RTS and CTS/ACK frames have at least 10 bits of Pad bits, and the Color is 6 bits, so the Pad bits of these control frames are sufficient to carry Color.

Table 2

The method in the embodiment of the present application solves the problem that the device effectively distinguishes the control frame sent in the legacy PPDU format, that is, by carrying Color in the Pad bits portion of the control frame or carrying the Color on the SERVICE field of the PPDU carrying the control frame.

It should be noted that there are many variants of the BA and BAR frames. Different variants have different formats and lengths, which results in a large change in the length of their Pad bits, and may occur when the length of the Pad bits is less than 10 bits. At this time, the Pad bits are not enough to carry Color. Therefore, for BA and BAR frames, a best-effort approach can be used: when the length of the Pad bits is not less than 10 bits, the Color is carried therein; otherwise, the Color is not carried. On the other hand, the BSS attribution of BA/BAR will not have serious consequences even if it cannot be determined. This is because BA/BAR is used in the block acknowledgment process, which is obviously located in the final stage of an exchange sequence, that is, the Duration value in its MAC frame is small, even if it is set with the wrong NAV. It runs out quickly, and in such a short period of time, the probability of receiving CF-End causing interference or being unable to be released is small. RTS/CTS is different. They are located in the initial stage of an interaction sequence and are used to transmit and protect the remaining time of the current interaction sequence. Therefore, the Duration in the MAC frame is large. Once the BSS attribution of the RTS/CTS cannot be determined, Furthermore, if regular-NAV is set according to the duration, it will last for a long time, and the probability of occurrence of interference or being unable to be released is large. The ACK frame is generally located in the last stage of an interaction sequence, and the Duration is small, but when the ACK is used for Fragmentation transmission, the Duration of the ACK frame is used to transmit and protect the subsequent data and the acknowledgement frame. At this time, the ACK is The Duration will also be larger. Therefore, the present application is mainly directed to three kinds of Duration large management frames of RTS/CTS/ACK and Control Wrapper frames based on these three frames. The control Wrapper frame structure based on RTS/CTS/ACK is shown in Fig. 6(a) and Fig. 6(b). Using the analysis similar to Table 2, it can be found that their Pad bits are at least 10 bits long.

It should also be noted that if the control frame transmission uses non-HT duplicate (non-high throughput copy) transmission, that is, first generate a 20 MHz control frame, and then perform frequency domain copying in units of 20 MHz, then each 20 MHz control frame is Color is included in the Pad bits. In other words, Color is located in the Pad bits of the 20MHz control frame. When copying in the frequency domain, the Color in the Pad bits is also copied, so that each 20MHz Pad bits has Color information.

The method for determining the BSS attribution and the method for sending the control frame provided by the embodiment of the present application do not change the frame structure of the control frame, and the Color is placed in the legacy PPDU, so that the third party device can obtain the Color, thereby determining the BSS attribution of the current control frame. At the same time, it does not affect the legitimate device receiving the control frame correctly. The Legacy device refers to a device that does not support the solution of the present application.

The method of the embodiment of the present application is described below.

The method for filling the color into the PPDU in the embodiment of the present application mainly includes the following two types:

1. Fill Color into the tail padding part of the PPDU's Data field.

The first device acquires a first color, and the first color is used to identify the BSS to which the first device belongs. The first device generates a PPDU carrying a control frame according to the first Color, where the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a first Color. Then, the first device sends a PPDU to the second device. Therefore, the second device acquires the PPDU of the bearer control frame sent by the first device. Then, the second device determines whether the first color and the pre-stored second color are the same, and the second color is used to the BSS to which the second device belongs. If the first color and the second color are the same, the second device determines that the control frame carried by the PPDU is from the BSS to which the second device belongs.

Therefore, the second device may perform a corresponding operation according to the determination result. For example, when the second device determines that the control frame carried by the PPDU is from the BSS to which the second device belongs, the second device may perform the duration setting according to the control frame. intra-NAV, but does not affect regular-NAV, or the second device releases intra-NAV according to the CF-End carried by the control frame, but does not affect regular-NAV. If the first color in the PPDU is different from the second color pre-stored by the second device, the second device determines that the control frame in the PPDU is not from the BSS to which the second device belongs. Therefore, the second device can set the regular-NAV according to the Duration carried by the control frame, but does not affect the intra-NAV, or only releases the regular-NAV according to the CF-End carried by the control frame.

There are a plurality of specific implementation manners for carrying the color in the tail padding part of the data field of the PPDU. Four specific embodiments are hereinafter described. For details, refer to the following related content.

2. Fill Color into the SERVICE field in the Data field of the PPDU.

The first device acquires a first color, and the first color is used to identify the BSS to which the first device belongs. Then, the first device generates a check field according to the first color, and the check field is used by the receiving end to verify whether the Color is received correctly. Then, the first device generates a PPDU carrying a control frame according to the first Color and the check field, where the PPDU includes a Data field, and the Data field includes a SERVICE field, a PSDU field, and a tail padding portion, where the SERVICE field includes a first color, and the PSDU field includes A control frame, the tail padding portion including a check field. The first device may send the PPDU to the second device, so that the second device acquires the PPDU of the bearer control frame sent by the first device. Then, the second device determines whether the first Color is received correctly based on the check field. If the first color is received correctly, the second device determines whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs; if the first color and the second color are the same, The second device determines that the control frame is from the BSS to which the second device belongs.

The specific process of determining the source of the control frame in the PPDU and the operation performed according to the judgment result may refer to the corresponding description of the tail padding portion of the Data field in which the Color is filled into the PPDU.

In the technical solution provided by the embodiment of the present application, after the first device acquires the first color for identifying the BSS to which the first device belongs, the first device generates a PPDU of the bearer control frame according to the first color, where the PPDU includes the Data field. The Data field includes a PSDU field and a tail padding portion, and the PSDU field includes a control frame, a tail padding portion, or a SERVICE field of the Data field may include a first color, and then the first device sends a PPDU to the second device, so that the second device acquires The PPDU of the bearer control frame sent by the first device. Then, the second device determines whether the first color and the pre-stored second color are the same, the second color is used to identify the BSS to which the second device belongs; if the first color and the second color are the same, the second device determines the control frame From the BSS to which the second device belongs; otherwise, the control frame of the PPDU is determined to be from the BSS to which the non-second device belongs. In this way, by comparing the colors, the device can effectively distinguish the control frame sent in the PPDU format, and the PPDU can be in the legacy PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the double The NAV mechanism is more efficient, avoids interference, and increases equipment signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead. The so-called backward compatibility means that the PPDUs in this padding mode can be correctly understood by the legacy device, that is, the new content in the PPDU does not affect the reception of the control frame carried by the legacy device to the PPDU.

According to the above description, the following describes the method for determining the BSS attribution in the embodiment of the present application, where five specific embodiments will be hereinafter, and each method for determining the BSS attribution of these embodiments includes sending a control frame. The method and the method of determining the attribution of BSS are two parts. The PPDUs in the following embodiments of the present application are described by taking a legacy PPDU as an example.

A specific embodiment of the tail-filling portion of the Data field in which Color is filled into the PPDU is first described, and four examples are given below.

1) Pad bits are encoded in Tail-biting BCC

According to the foregoing analysis, the available Pad bits for the RTS/CTS/ACK frame is only 10 bits. If BCC encoding is used, the Pad bits must include Color (6 bits), Cyclic Redundancy Code (CRC) (at least 4 bits) and Tail (6 bits). Obviously, the 10 bits of Pad bits is not enough to carry so much information. In view of this, the Tail-biting BCC encoding is used for the Pad bits portion, and the Tail portion can be omitted, that is, only Color (6 bits) and CRC (4 bits) are transmitted, for a total of 10 bits.

Referring to FIG. 7, the method provided by the embodiment of the present application is specifically as follows:

Step 701: The sending device acquires the first color.

The first color is used to identify the BSS to which the sending device belongs.

The control frame sent by the sending device in the legacy PPDU format, that is, the control frame is carried by the legacy PPDU. Prior to this, the transmitting device acquires the first Color, for example, the pre-stored first Color may be acquired from a storage module on the transmitting device, or the transmitting device acquires the first Color from the AP.

The first color is usually determined by the AP when the network is initialized, but can also be modified at any time. The specific form of the first Color can be referred to the specific description of Color in the above.

Step 702: The sending device generates a CRC according to the first Color.

The CRC is a check code used by the receiving end to verify whether the first Color is received correctly.

After the sending device sends the first color, the receiving device acquires the first color, and the receiving end needs to determine whether the first color is received correctly, so as to improve the reliability of Color receiving. To achieve this, the transmitting device first generates a CRC according to the first Color before transmitting the first Color. The receiving end can verify whether the first color is received correctly according to the CRC. Wherein the transmitting device can generate a CRC according to the first Color using a predefined algorithm.

It can be understood that the CRC is only one form of implementation verification, and is carried in the check field. The check field is used by the receiving end to verify whether the first color is received correctly. In the embodiment of the present application, the check field may also carry other specific forms of check codes, for example, a parity check code, etc., the present application The specific form of the check field is not specifically limited in the embodiment.

Step 703: The sending device generates a PPDU carrying a control frame according to the first Color and the CRC.

The PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, and the PSDU field includes a control frame, and the tail padding portion includes a first Color.

The tail padding portion of the PPDU includes a check field. In the tail padding portion, the check field and the first color are located after the tail information Tail, and the first color is located at the tail of the tail padding portion.

Specifically, when generating the PPDU carrying the control frame, the sending device fills the acquired first color into the tail padding portion of the PPDU, and fills the CRC into the tail padding portion. Thus, the first color is filled in the tail fill portion And CRC, and after the CRC and the first Color are located at the tail information Tail, the first Color is located at the end of the tail padding portion. In the embodiment shown in FIG. 7, regarding the specific structure of the PPDU, reference may be made to the structural diagram of the PPDU shown in FIG. 8.

Among them, Tail is used to improve the BCC decoding performance of the receiving end.

For the method for the sending device to generate the PPDU carrying the control frame, refer to the related content.

In the embodiment of the present application, when the sending device generates the PPDU carrying the control frame, in order to implement the method in this embodiment, the MAC layer of the sending device transmits the PSDU to the PHY, and the first color and the CRC are also required. The element of the primitive parameter TXVECTOR is passed to the PHY via the PHY-TXSTART.request primitive. When the PHY finds that the TXVECTOR from the MAC layer contains the first element of Color and CRC, it will not be filled with 0 when padding the Pad bits, but will be filled according to the method of this embodiment, that is, the Color and CRC are filled in. The Pad bits portion of the PPDU. In this way, the transmitting device can generate the PPDU of the bearer control frame according to the first Color and the CRC.

As shown in FIG. 8, it is a Data field structure of a legacy PPDU format control frame in the embodiment of the present application. Wherein, in the original position for placing the Pad bits, in the embodiment, the CRC, the first color, and the remaining Pad bits (ie, the Pad in the figure) may be placed; the CRC is at least the verification of the Color, and in some implementations. In the example, the CRC may also be a check of the Pad and the first Color. The order of the Pad and the CRC can be interchanged, as shown in Figure 9(a). The Pad can also be divided into two parts, Pad1 and Pad2, which are located before and after the CRC, as shown in Figure 9(b). In short, the CRC can be located in a fixed position in the original Pad bits. The existence of the Pad is due to the fact that the original Pad bits may be longer than 10 bits. After using 10 bits to carry Color and CRC, there will be some Pads remaining. These Pads can be filled with 0 or used to carry other information. Obviously, if the original Pad bits are exactly 10 bits, there will be no Pad, so the Pad fields in Figures 8, 9a and 9b are indicated by dashed boxes.

In the embodiment of the present application, the first color must be located at the tail of the tail-filling portion, which is determined by the characteristics of the subsequent Tail-biting BCC encoding step: the transmitting device uses the first color to be transmitted as shown in FIG. 10 The initial values of the illustrated 802.11 BCC encoder are BCC encoded for Pad bits, CRC, and Color, and the encoder initial value First Color forms a "tail biting" with the first Color of the tail of the transmitted data.

In some embodiments of the present application, the sending device may generate a PPDU carrying a control frame according to the color, that is, in the generated PPDU, the CRC may not be included. Correspondingly, in the embodiment of the application, the sending device may not perform the step. 702.

Step 704: The transmitting device performs BCC encoding on the Tail and Tail portions in the Data domain, and performs Tail-biting BCC encoding on the portion after the Tail in the Data domain.

The first Color is set at the end of the tail-fill portion in preparation for Tail-biting BCC encoding.

Specifically, the PHY layer of the transmitting device uses the traditional BCC encoding for the portion before the Tail and the Tail in the Data domain, and the Tail-biting BCC encoding for the portion after the Tail, and the encoding for the Tail-biting BCC encoding. The initial value of the device is the first Color.

Through the execution of the foregoing process, the sending device generates a PPDU carrying a control frame, so that the sending device can send the PPDU to the receiving device, so that the receiving device performs a corresponding operation, for example, the receiving device can be based on the first color on the PPDU. The source of the control frame carried by the PPDU or the PPDU is determined, as shown in steps 708 and 709 below.

In some embodiments of the present application, the PPDU further includes a presence indication, and the presence indication is used to indicate that the PPDU includes Color.

For example, the presence indication may be populated to the PPDU when the transmitting device generates the PPDU.

After the receiving device obtains the PPDU sent by the sending device, the PHY of the receiving device may decide whether to identify the first color, or whether the corresponding bit sequence of the first color needs to be transmitted to the MAC layer, and the sending device may add the PPDU. The presence indicator may, after obtaining the PPDU sent by the sending device, determine whether to identify the first color in the PPDU according to the presence indication, or whether to transmit the corresponding bit sequence of the first Color to the MAC layer. This can improve the efficiency of the receiving device performing the method of the embodiment of the present application.

For the present embodiment, there is an indication that the tail padding portion for indicating the PPDU includes the first Color. For example, the presence indicator is 1 bit in the PPDU. When the value of the bit is 1, the tail padding portion of the current PPDU includes the first color. At this time, the receiving device needs to identify the first color, or needs to fill the tail of the PPDU. The bit sequence corresponding to the first Color in the portion is passed to the MAC layer.

For a specific method for carrying the presence indication in the PPDU, reference may be made to the subsequent description of the method for carrying the presence indicator.

Step 705: The receiving device acquires a PPDU of a bearer control frame sent by the sending device.

The sending device sends a PPDU to the receiving device. After the foregoing steps are performed, the PPDU acquired by the receiving device includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a first color, a first color. It is used to identify the basic service set BSS to which the sending device belongs.

The tail padding portion includes a tail information Tail, a first color, and a check field. In the tail padding portion, the check field and the first color are located after the Tail, and the first color is located at the tail of the tail padding portion, and the Tail is used to improve BCC decoding performance at the receiving end.

Step 706: The receiving device performs BCC decoding on the part before the Tail and the Tail in the Data domain, and performs Tail-biting BCC decoding on the part after the Tail in the Data domain.

Because the sending device encodes the Data field of the PPDU, the receiving device needs to perform corresponding decoding operations on the Data field in order to obtain information such as the first Color on the PPDU.

Specifically, when the receiving device receives the frame sent by the sending device, if the receiving device is a legacy device, the decoding is performed according to the traditional BCC, that is, the portion after the Tail is ignored. If the receiving device is a device that can perform the corresponding method in the embodiment of the present application, the PHY of the receiving device is decoded according to the traditional BCC for the part before the Tail (including the Tail), and the Tail-biting is followed for the part after the Tail. The BCC performs decoding and passes the decoded results of both parts to the MAC layer. For the decoding result of the part after the Tail, the verification of Color can also be completed by the PHY of the receiving device. If the verification is correct, the PHY transmits the Color to the MAC layer.

Optionally, in the solution that the PPDU further includes the indication that the PPDU includes the first color, the method further includes: before the receiving device determines whether the first color and the pre-stored second color are the same, the method further includes: the receiving device determining whether the PPDU includes the presence indication If the PPDU includes the presence indication, the receiving device performs a step of determining whether the first Color and the pre-stored second Color are the same. Or the receiving device performs the subsequent steps of step 707 and the like. If the PPDU does not include a presence indication, the receiving device does not perform the subsequent steps below. The receiving device determines whether the PPDU includes the presence indication may be performed after step 706, and may also be performed before step 706. The specific implementation manner may be determined according to the specific form of the presence indication.

Step 707: The receiving device determines, according to the check field, whether the first color is received correctly; if the first color receives positive Indeed, the receiving device performs step 708.

The tail padding portion of the Data field includes a CRC, which is used by the receiving device to verify whether the received first color is received correctly after receiving the PPDU, so that the execution reliability of the method in the embodiment of the present application can be improved.

Specifically, the receiving device calculates whether the first Color is received correctly based on the CRC at the MAC layer or the PHY. If the first Color is received correctly, the receiving device performs the subsequent steps of step 708 and the like, otherwise step 708 is not performed.

Step 708: The receiving device determines whether the first color and the pre-stored second color are the same. If the first color and the second color are the same, the receiving device performs step 709.

The second color is used to identify the BSS to which the receiving device belongs, and the second color may be stored in the receiving device. The related content of the second color may refer to the corresponding description of the color.

The receiving device determines whether the first Color and the pre-stored second Color are the same. If the first color and the second color are the same, the receiving device determines that the control frame carried by the PPDU is from the BSS to which the receiving device belongs, otherwise, the receiving device determines that the control frame is from a BSS to which the receiving device belongs, that is, determining This control frame comes from other BSSs.

Step 709: The receiving device determines that the control frame is from the BSS to which the receiving device belongs.

If the first color and the second color are the same, the receiving device may determine that the control frame carried by the PPDU is from the BSS to which the receiving device belongs. Thereby, the receiving device can perform an operation related to the control frame from the BSS to which the receiving device belongs. For example, the receiving device determines that the control frame in the PPDU is from the BSS to which the receiving device belongs, and the receiving device can set the intra-NAV according to the Duration carried by the control frame, but does not change the regular-NAV, or the receiving device according to the control The CF-End carried by the frame releases the intra-NAV, but does not change the regular-NAV.

Correspondingly, if the first color in the PPDU is different from the second color pre-stored by the receiving device, the receiving device determines that the control frame in the PPDU is not from the BSS to which the receiving device belongs. Therefore, the receiving device can set the regular-NAV according to the Duration carried by the control frame, but does not change the intra-NAV, or only releases the regular-NAV according to the CF-End carried by the control frame.

2) The Pad bits part uses the traditional BCC code.

For the disadvantage that the new coding mode is introduced in the embodiment shown in FIG. 7 to cause the complexity of the device to be improved, this embodiment proposes that the traditional BCC is used together with the previous SERVICE and PSUD for the first Color and CRC placed at the original Pad bit position. Encoding, as shown in Figure 11. Wherein, the CRC is at least a check for the first color, and the CRC and the first color are exchanged in tandem. The meaning of Pad in FIG. 11 is the same as that of Pad in the embodiment shown in FIG. 7, but the position should be after the first Color and CRC and the value should be all 0, which will not be described again.

Referring to FIG. 12, the method in this embodiment of the present application includes:

Step 1201: The sending device acquires the first Color.

The first color is used to identify the BSS to which the transmitting device belongs.

Step 1201 can refer to step 701.

Step 1202: The sending device generates a CRC according to the first Color.

The CRC is used by the receiving end to verify that Color is received correctly;

Step 1202 can refer to step 702.

Step 1203: The sending device generates a PPDU carrying a control frame according to the Color and the check field.

The PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a Color and a check field. The tail padding part also includes the tail information Tail. The first Color and the CRC are located after the Tail, and the Tail is used to improve the BCC decoding performance of the receiving end.

For example, when the transmitting device generates the PPDU, the first Color and the CRC are filled into the tail padding portion of the PPDU, and in the tail padding portion, the first Color and the CRC are located after the Tail. The Tail is used to improve the decoding performance of the BCC at the receiving end.

In some embodiments of the present application, the end of the tail-fill portion further includes a remaining padding bit Pad, which is an all-zero sequence. In some embodiments of the present application, the CRC may further verify the Pad.

Since the Pad Bits part is assumed to be an all-zero sequence in the original standard, in the embodiment of the present application, the Pad part is set to the all-zero sequence, and the original filling mode can be changed in the Pad part, and The receiving end can also decode the Pad as a Tail, which is equivalent to increasing the length of the Tail, which is beneficial to increasing the correct probability of decoding the data tail bits. This is specifically related to the Viterbi decoding algorithm.

It can be understood that, in some embodiments of the present application, the Pad bits portion may not include the Pad.

For the method for generating a PPDU by the sending device, refer to the description of the PPDU generated by the foregoing device, and the related description of step 703 above. However, in the method of the embodiment of the present application, after the Tail, the transmitting device fills the first color and the CRC into the tail padding portion of the PPDU, where the CRC is at least a check for the first color. Also, in comparison with the embodiment shown in FIG. 7, in the embodiment of the present application, in the tail padding portion, the order of the CRC and the first Color can be exchanged.

Step 1204: The sending device performs BCC encoding on the Data domain.

Before transmitting the PPDU, the sending device encodes the Data field of the PPDU, and uses the traditional BCC encoding together with the previous SERVICE domain and the PSUD domain for the first Color and CRC placed in the original Pad bit position.

After the foregoing steps are performed, the sending device generates a PPDU carrying a control frame. After the sending device sends the PPDU to the receiving device, the receiving device may perform source determination according to the first color carried by the PPDU, and determine the PPDU according to the first color. Whether the bearer control frame originates from the BSS to which the receiving device belongs. See the description below for details.

In some embodiments of the present application, the PPDU further includes a presence indication, and the presence indication is used to indicate that the PPDU includes the first Color.

After the receiving device obtains the PPDU sent by the sending device, the PHY of the receiving device may decide whether to identify the first color, or whether the corresponding bit sequence of the first color needs to be transmitted to the MAC layer, and the sending device may add the PPDU. The presence indicator may, after obtaining the PPDU sent by the sending device, determine whether to identify the first color in the PPDU according to the presence indication, or whether to transmit the corresponding bit sequence of the first Color to the MAC layer.

Step 1205: The receiving device acquires a PPDU of a bearer control frame sent by the sending device.

Through the execution of the foregoing steps, the receiving device may receive the PPDU of the bearer control frame sent by the sending device. The PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, and the PSDU field includes a control frame and a tail padding unit. The minute includes a first Color and a check field, and the first Color is used to identify the basic service set BSS to which the transmitting device belongs. The tail padding portion further includes a tail information Tail, the first Color and the check field are located after the Tail, and the Tail is used to improve the BCC decoding performance of the receiving end.

In some embodiments of the present application, the end of the tail-fill portion further includes a remaining padding bit Pad, which is an all-zero sequence.

Step 1206: The receiving device performs BCC decoding on the Data domain.

Corresponding to the step 1204, the sending device encodes the Data field according to the BCC, and the receiving device further decodes the Data field of the acquired PPDU by using the BCC, thereby obtaining information such as the first Color and CRC of the Data field.

Specifically, the PHY of the receiving device decodes the entire Data field according to the conventional BCC, and the decoding result of the Pad bits also needs to be transmitted to the MAC layer. This is consistent with the processing method of the Data field of the PPDU by the sender and the receiver in the prior art, and thus does not bring about an increase in device complexity.

Optionally, in an embodiment where the PPDU is configured to indicate that the PPDU includes the presence indication of the first color, the method of the embodiment further includes: the receiving device, before the receiving device determines whether the first color and the pre-stored second color are the same. Determining whether the PPDU includes a presence indication; if the PPDU includes a presence indication, the receiving device performs a step of determining whether the first Color and the pre-stored second Color are the same. Or step 1207 is performed, otherwise the receiving device does not perform the following steps in the following, thus improving the execution efficiency of the embodiment of the present application.

The receiving device determines whether the PPDU includes the presence indication may be performed after step 1206, and may also be performed before step 1206. The specific implementation manner may be determined according to the specific form of the presence indication.

Step 1207: The receiving device determines, according to the check field, whether the first Color is received correctly. If the first Color is received correctly, the receiving device performs step 1208.

The tail padding portion of the Data field includes a CRC, which is used by the receiving device to verify whether the received first color is received correctly after receiving the PPDU, thereby improving the reliability of the method in the embodiment of the present application.

Specifically, the receiving device calculates whether the first Color is received correctly based on the CRC at the MAC layer or the PHY. If the first Color is received correctly, the receiving device performs the subsequent steps of step 1208 and the like, otherwise step 1208 is not performed.

Step 1208: The receiving device determines whether the first color and the pre-stored second color are the same. If the first color and the second color are the same, the receiving device performs step 1209.

The second color is used to identify the BSS to which the receiving device belongs.

Step 1208 can refer to step 708.

Step 1209: The receiving device determines that the control frame is from the BSS to which the receiving device belongs.

If the first Color and the second Color are the same, the receiving device determines that the control frame is from the BSS to which the receiving device belongs.

Step 1209 can refer to step 709.

3) The padding part uses the traditional BCC but does not contain the CRC

Based on the embodiment shown in FIG. 12, in order to further improve the transmission reliability of the first color, this embodiment proposes to use the location where the pad bits are originally placed to carry the first color, but does not include the CRC, as shown in FIG. schematic diagram. The reason why the CRC is not added is mainly because the PSDU includes a check for the PSDU, for example, a Frame Check Sequence (FCS) field in the RTS/CTS/ACK frame, and the length of the PSDU is much larger than the first. Color, so when the PSDU check is correct, the first Color is also correct with great probability. For example, the PSDU of an RTS frame The length is 22 bytes = 176 bits, and the PSDU length of the CTS/ACK frame is 112 bits, which is much larger than the 6 bits of Color.

As shown in FIG. 13, since the original Pad bits of the control frame are at least 10 bits, the length of the Pad is greater than or equal to 4 bits. Pad can also be regarded as Tail, so it should be filled in 0. The receiving end can effectively improve the correct receiving probability of the first color by using Pad. Thus, the scheme of the present embodiment has higher transmission reliability than the first Color of the scheme of the embodiment shown in FIG.

For the specific implementation process of the embodiment of the present application, reference may be made to the embodiment shown in FIG. 12, except that in the embodiment of the present application, the PPDU does not include the CRC, and thus the method in the embodiment of the present application does not need to perform the steps related to the CRC. For example, the transmitting device does not need to perform step 1202, nor does it need to fill the CRC into the tail padding portion, and the receiving device does not need to perform step 1207. Correspondingly, the frame structure of the embodiment of the present application is the frame structure shown in FIG.

4) The tail fill part replaces Tail+Pad bits with Color+CRC+Tail+Pad

In order to ensure that the first color has the same reliability as the PSDU part, and the reception of the first color is correct or not, this embodiment proposes that the tail padding part in the legacy PPDU format control frame, that is, Tail+Pad bits Part (16+x bits total), replaced by the first Color (6bits), CRC (4bits), Tail (6bits) and possibly existing Pad (x bits), as shown in Figure 14. The channel coding mode of the entire Data domain is unchanged, that is, the traditional BCC coding is adopted.

Referring to FIG. 15, the method in this embodiment of the present application includes:

Step 1501: The sending device acquires the first Color.

Step 1501 can refer to step 701.

Step 1502: The sending device generates a CRC according to the first Color.

The CRC is used by the receiving end to verify whether the first Color is received correctly.

Step 1502 can refer to step 702.

Step 1503: The sending device generates a PPDU carrying a control frame according to the first Color and the check field.

The PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a first Color and a CRC. The tail padding part also includes the tail information Tail, the first Color and the CRC are located before the Tail, and the Tail is used to improve the BCC decoding performance of the receiving end.

The order of the first Color and the CRC may be interchanged, but the Tail must be after the first Color and the CRC. The CRC is at least a check for the first Color. The meaning of Pad is the same as that of Pad in the embodiment shown in FIG. 7, but the position of Pad should be after Tail and the value should be all 0. When Pad bits are 10 bits, the length of Pad is x=0, that is, Pad is not presence.

For the method for generating a PPDU by the sending device, refer to the description of the corresponding part. However, in the method of the embodiment of the present application, the sending device fills the first color and the CRC into the end of the PPDU when generating the PPDU carrying the control frame. The portion is filled, and the first Color and CRC are located before the Tail.

Specifically, to implement the solution of the embodiment, the MAC layer of the sending device needs to transmit the PSDU to the PHY, and also needs to pass the Color and CRC as elements of the primitive parameter TXVECTOR to the PHY-TXSTART.request primitive. PHY. When the PHY finds that the TXVECTOR from the MAC contains the first element of Color and CRC, For the PSDU, it is no longer necessary to add the Tail first and then add the Pad bits, but to process according to the scheme of the embodiment. Thereafter, the processing of the Data field by the PHY is identical to that of the legacy transmitter for the Data field in the legacy PPDU.

Step 1504: The sending device performs BCC encoding on the Data domain.

Before the sending device sends the PPDU, the PHY of the sending device encodes the Data field of the PPDU, specifically, the BCC is used to encode the Data field.

After the foregoing steps are performed, the sending device generates a PPDU carrying a control frame, so that the sending device sends a PPDU to the receiving device, and the receiving device can perform source determination according to the first color carried by the PPDU, and determine the control of the PPDU according to the first color. Whether the frame originates from the BSS to which the receiving device belongs.

In some embodiments of the present application, the PPDU further includes a presence indication, and the presence indication is used to indicate that the PPDU includes Color. The presence indication is carried in the PPDU, and the presence indication is used to indicate that the PPDU includes Color.

After the sending device performs BCC encoding on the Data field, the sending device can send the PPDU to the receiving device.

Step 1505: The receiving device acquires a PPDU of a bearer control frame sent by the sending device.

Performing the above steps by the sending device, the PPDU acquired by the receiving device includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a first color, and the first color is used to belong to the sending device. The basic service set BSS is identified; the tail padding portion also includes a check field. The tail padding portion further includes a tail information Tail, the first Color and the check field are located after the Tail, or the first Color and check fields are located before the Tail, and the Tail is used to improve the BCC decoding performance of the receiving end.

Step 1506: The receiving device performs BCC decoding on the Data domain.

Corresponding to the step 1504, the sending device encodes the Data field according to the BCC, and the transmitting device further decodes the Data field of the acquired PPDU by using the BCC, thereby obtaining information such as the first Color and CRC of the Data field.

When the legacy device receives the legacy PPDU format and performs BCC decoding on the Data field, the decoder may use Tail as the known knowledge of the all-zero sequence. However, the decoder may also use the known knowledge of the full-zero sequence for the auxiliary translation. code. Whether the decoder uses Tail to assist the decoding of the known knowledge of the all-zero sequence depends entirely on the internal implementation of the device. If the legacy device uses the latter decoding mode, the PPDU filling method proposed in this embodiment does not affect the reception of the legacy device.

Optionally, in an embodiment where the PPDU is configured to indicate that the PPDU includes the presence indication of the first color, before the receiving device determines whether the first color and the pre-stored second color are the same, the method further includes: the receiving device determining whether the PPDU includes the presence The indication; if the PPDU includes the presence indication, the receiving device performs a step of determining whether the first Color and the pre-stored second Color are the same. Or step 1507 is performed, otherwise the receiving device does not perform the following steps in the following, so that the execution efficiency of the embodiment of the present application can be improved.

Step 1507: The receiving device determines, according to the check field, whether the first color is received correctly. If the first color receives If so, the receiving device performs step 1508.

Step 1507 can refer to step 707.

Step 1508: The receiving device determines whether the first color and the pre-stored second color are the same. If the first color and the second color are the same, the receiving device performs step 1509.

Step 1509: The receiving device determines that the control frame is from the BSS to which the receiving device belongs.

Step 1509 can refer to step 709.

The above four embodiments are specific implementation embodiments of "filling Color into the tail-filled portion of the Data field of the PPDU".

In summary, after the sending device acquires the first color for identifying the BSS to which the sending device belongs, the sending device generates a PPDU of the bearer control frame according to the first color, where the PPDU includes a Data field, and the Data field includes the PSDU field and the tail. The padding part, the PSDU field includes a control frame, and the tail padding part includes a first color. Then, the sending device sends a PPDU to the receiving device, so that the receiving device acquires the PPDU of the bearer control frame sent by the sending device. Then, the receiving device determines whether the first color and the pre-stored second color are the same, the second color is used to identify the BSS to which the second device belongs; if the first color and the second color are the same, the receiving device determines that the control frame is from the same The BSS to which the second device belongs; otherwise, the control frame of the PPDU is determined to be from the BSS to which the non-receiving device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the legacy PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective and avoids interference. Increased device signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

The following is a specific embodiment of "the SERVICE field in the Data field in which Color is populated into the PPDU".

5) SERVICE carries Color, and Pad bits carry CRC.

In order to ensure that Color has the same reliability as the PSDU part, and whether the reception of Color is correct or not, and does not affect the reception of the legacy device by the legacy device, this embodiment proposes to use the 6bits in the 9bits reserved bits of the SERVICE field to carry the Color. At the same time, the CRC (4bits) and Tail (6bits) of Color are carried by 10bits in the original Pad bits. To facilitate differentiation, the TSUL of the PSDU is called the first Tail (Tail1), and the Tail after the CRC is called the second Tail (Tail2), as shown in Figure 16. Tail2 is an all-zero sequence. Since there is 6bits of Tail2 after the CRC, the reliability of the CRC is exactly the same as the SERVICE and PSDU parts.

Referring to FIG. 17, the method in the embodiment of the present application further includes:

Step 1701: The sending device acquires the first Color.

Step 1701 can refer to step 701.

Step 1702: The sending device generates a CRC according to the first Color.

The check field CRC is used by the receiving end to verify whether Color is received correctly.

Step 1702 can refer to step 702.

Step 1703: The sending device generates a PPDU carrying a control frame according to the first Color and the check field.

The PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding portion, the SERVICE field includes a color, the PSDU field includes a control frame, and the tail padding portion includes a check field CRC. In the embodiment of the present application, the tail padding portion sequentially includes the first tail information Tail, CRC, and the second Tail, that is, Tail1, CRC, and Tail2 are sequentially arranged in the tail padding portion in order.

The first Tail is used to improve the BCC decoding performance of the SERVICE and PSDU parts at the receiving end, and the second Tail is used to improve the BCC decoding performance of the check field on the receiving end. That is, Tail1 is used to improve the BCC decoding performance of the SERVICE and PSDU parts at the receiving end, and Tail2 is used to improve the BCC decoding performance (ie, reliability) of the check field CRC. In the embodiment of the present application, Tail2 is set to an all-zero sequence. It can be understood that Tail2 can also be set to other sequence forms, as long as Tail2 is a sequence known to the sender and the receiver, such as the receiver and the sender. The specific form of Tail2 is agreed upon. As long as Tail2 is a well-known sequence between the sender and the receiver, the reliability of the check field can be improved. In the embodiment of the present application, the sending end is a sending device, and the receiving end is a receiving device.

In some embodiments of the present application, the end of the tail-filling portion further includes a Pad.

The meaning of Pad in Fig. 16 is the same as that of Pad in the embodiment shown in Fig. 7, but the position should be after Tail2 and the value should be all zeros. Since the Pad Bits part is a zero sequence in the original standard, in the embodiment of the present application, the Pad part is set to the all-zero sequence, and the original padding mode can be changed in the Pad part, and is received. The terminal can also decode the Pad as a Tail, which is equivalent to increasing the length of the Tail, which is beneficial to increasing the correct probability of decoding the data tail bits. This is specifically related to the Viterbi decoding algorithm.

It can be understood that when the Pad bits is exactly 10 bits, the length of the Pad is 0, that is, there is no Pad field.

Step 1704: The sending device performs BCC encoding on the Data domain.

The transmitting device performs channel coding on the entire Data field shown in FIG. 16 using BCC.

Specifically, in order to implement the method in the embodiment of the present application, the MAC layer of the sending device transmits the PSDU to the PHY, and also needs to pass the Color and CRC as elements of the primitive parameter TXVECTOR to the PHY-TXSTART.request primitive. PHY. When the PHY finds that the TXVECTOR from the MAC contains the first element of Color and CRC, the first 4 bits are filled with CRC instead of 0 when padding the Pad bits, and the first Color is carried by the 6 bits reserved bit in SERVICE. The PHY then performs traditional BCC encoding on the entire Data field.

After the foregoing steps are performed, the sending device generates a PPDU carrying a control frame, so that the sending device sends a PPDU to the receiving device, and the receiving device can perform source determination according to the first color carried by the PPDU, that is, the PPDU is determined according to the first color. Whether the control frame originates from the BSS to which the receiving device belongs. For details, refer to the description of the method described below.

For a description of this, see the related content below.

Step 1705: The receiving device acquires a PPDU of a bearer control frame sent by the sending device.

The transmitting device performs the foregoing steps, and the receiving device receives the PPDU sent by the sending device, including a Data field, where the Data field includes a SERVICE field, a PSDU field, and a tail padding portion, the SERVICE field includes a first Color, and the PSDU field includes a control frame, and a tail padding. The part includes a check field, the first color is used to identify the BSS to which the sending device belongs, and the check field is used by the receiving end to verify whether the first color is received correctly.

In the embodiment of the present application, the tail padding portion includes a first tail information Tail, a check field, and a second Tail, and the first Tail is used to improve BCC decoding performance of the SERVICE and PSDU parts at the receiving end, and the second Tail is used. In order to improve the BCC decoding performance of the check field CRC of the receiving end.

Step 1706: The receiving device performs BCC decoding on the Data domain.

Corresponding to the step 1704, the receiving device encodes the Data field according to the BCC, and the receiving device further decodes the Data field of the acquired PPDU by using the BCC, thereby obtaining information such as the first color and the CRC of the Data field.

Specifically, when the receiving device receives the PPDU, if the receiving device is a legacy device, the decoding is performed according to the traditional BCC, that is, the portion after the Tail1 is ignored. If the device is a device that performs the embodiment of the present application, the PHY of the receiving device decodes the entire Data field according to the traditional BCC, and then transmits the 6 bits corresponding to the Color in the SERVICE and the first 4 bits (corresponding to the CRC) in the Pad bits to the MAC. Layer, the MAC layer calculates whether the first Color is received correctly based on the CRC. Of course, the verification of Color can also be completed by the PHY of the receiving device. If the verification is correct, the PHY transmits Color to the MAC layer.

Step 1707: The receiving device determines, according to the check field, whether the first Color is received correctly; if the first Color is received correctly, the receiving device performs step 1708.

Step 1708: The receiving device determines whether the first Color and the pre-stored second Color are the same. If the first Color and the second Color are the same, the receiving device performs step 1709.

If the first Color is received correctly, the receiving device determines whether the first Color and the pre-stored second Color are the same.

Step 1708 can refer to step 708.

Step 1709: The receiving device determines that the control frame is from the BSS to which the receiving device belongs.

Step 1709 can refer to step 708.

Optionally, in an embodiment where the PPDU may include a presence indication for indicating that the PPDU includes the first color, before the receiving device determines whether the first color and the pre-stored second color are the same, the method further includes: the receiving device determining whether the PPDU is included There is an indication; if the PPDU includes a presence indication, the receiving device performs a step of determining whether the first Color and the pre-stored second Color are the same.

For a specific method for carrying the presence indication in the PPDU, reference may be made to the subsequent description of the method for filling in the presence indicator.

It can be understood that, because the PSDU domain is far longer than the SERVICE domain, the PSDU domain is verified in the PPDU. If the PSDU domain is correctly verified, the received SERVICE domain is also correct, that is, the Color carried in the SERVICE domain is correctly received. Therefore, in an embodiment of the present application, the PPDU may not include the CRC and the Tail2. Correspondingly, the sending device may not perform step 1702, and does not need to fill the tail padding part with CRC and Tail2, and the receiving device may not perform steps. 1707.

It can be understood that in still other embodiments of the present application, the tail padding portion of the PPDU includes CRC but does not include Tail2. At this time, the receiving device can verify whether Color is correctly received based on the CRC, but since there is no Tail2 after the CRC, the CRC transmission is relatively error-prone.

In summary, after the sending device acquires the first color for identifying the BSS to which the sending device belongs, the sending device generates a PPDU of the bearer control frame according to the first color, where the PPDU includes a Data field, and the Data field includes a PSDU field and In the tail padding part, the PSDU field includes a control frame, and the SERVICE field of the Data field includes a first color. Then, the sending device sends a PPDU to the receiving device, so that the receiving device acquires the PPDU of the bearer control frame sent by the sending device. Then, the receiving device determines whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the receiving device belongs; if the first color and the second color are the same, the receiving device determines that the control frame is from the The BSS to which the receiving device belongs; otherwise, the control frame of the PPDU is determined to be from the BSS to which the non-receiving device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the legacy PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective and avoids interference. Increased device signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

Execution of the above method, in some embodiments, using an indication of presence, the following is an embodiment of a method of carrying a presence indicator, in which the presence indication is correspondingly described, wherein the presence indication has multiple The implementation of the present application does not specifically limit this. It will be appreciated that in the various embodiments described above, corresponding different presence indications may be corresponding.

Since the PHY of the receiving device does not identify the specific frame type included in the PSDU, after receiving the PPDU and decoding its SERVICE and Pad bits in the PHY layer, the receiving device can directly identify whether the first color is included by the PHY. The solved bit sequence can be passed to the MAC layer, and the MAC layer identifies whether the first color is included. However, before this, some auxiliary measures can be taken to help the receiving PHY decide whether to identify the first Color or whether to transmit the corresponding bit sequence to the MAC layer. For example, if the standard specifies that the scheme of the present application is only used for a CTS/ACK frame, when the receiving PHY finds that the LENGTH field of the received PPDU physical header has a value of 14, the frame is considered to contain Color, and thus needs to be executed. Subsequent operation; if the standard stipulates that the scheme of the present application is only used for the RTS frame and the CTS/ACK frame, when the receiving PHY finds that the LENGTH field of the received PPDU physical header has a value of 14 or 20, it is considered that the frame may be Contains Color, which in turn requires subsequent operations.

In an embodiment of the present application, the PPDU carrying the control frame constructed by the solution of the present application includes the presence indication, so that when the receiving device receives a PPDU, it can determine whether the PPDU is included according to the presence indication on the PPDU. Contains the first Color. The presence indication may be implicit or explicit and may be included in the PHY information, such as L-SIG or SERVICE, or may be included in the MAC layer information. Specifically, the following six indication methods are included:

1, based on CRC judgment

For the embodiments shown in FIG. 7, FIG. 12 and FIG. 15, the bit sequence at the first Color position and the bit sequence at the CRC position in the PPDU may be directly indicated as the presence, that is, the transmitting device is filling the first Color and At the time of CRC, it is the padding for the presence indication. At the receiving device, the receiving device determines whether the PPDU includes the presence indication. The specific implementation manner is that the receiving device calculates the corresponding check value CRC according to the bit sequence of the first Color corresponding position in the Pad bits of the received PPDU, and the corresponding position with the CRC. Bit sequence comparison. If the two are the same, the PPDU is considered Contains the first Color; otherwise, the frame is considered not to contain the first Color or the first Color receive error.

2. Instructed in the L-SIG

There is a 1-bit reserved bit in the L-SIG, and the reserved bit bearer presence indication can be used to indicate whether the first color is included in the current PPDU, as shown in FIG. 18. For example, a value of 1 indicates that the first color is included, and 0 indicates that the first color is not included. This embodiment is applicable to any of the embodiments of 1) to 5) above.

For example, the sending device fills the PPDU with a presence indication, specifically, the reserved bit of the transmitting device in the L-SIG in the PPDU is filled with 1, and the receiving device determines whether the PPDU includes the presence indication, specifically, the receiving device determines the L-SIG in the PPDU. Whether the reserved bit has padding 1.

3. Instruct in the Frame Control field

The Frame Control field is located at the beginning of the PSDU, and the Frame Control field of the control frame contains a plurality of reserved bits, such as the bits in the dotted box in FIG. Any one of the bits may be used as an indication of presence, indicating whether the first color is included in the current PPDU. For example, a value of 1 indicates that the first color is included, and 0 indicates that the color is not included. This embodiment is applicable to any of the embodiments of 1) to 5) above.

For example, the sending device fills the PPDU with a presence indication, specifically, the preset reserved bit padding of the sending device in the Frame Control field in the PPDU, and the receiving device determines whether the PPDU includes the presence indication, specifically, the receiving device determines the Frame Control field in the PPDU. Whether the preset reserved bit in the pad has padding 1.

4, through the SERVICE domain indication, and contains the CRC

There are 9bit reserved bits in the SERVICE field. You can use any of them as the Color presence indicator to indicate whether the current PPDU includes Color. For example, a value of 1 indicates that Color is included, and 0 indicates that Color is not included. Note that since the SERVICE field itself is not verified, the SERVICE field should also include a check for the presence of the Color indicator. For example, the CRC is carried by 4 bits in the SERVICE domain as a check for the presence of Color. This embodiment is applicable to any of the embodiments of 1) to 4) above.

For example, the sending device fills the PPDU with the presence indication, specifically, the preset reserved bit of the sending device in the SERVICE field in the PPDU is filled with 1, and the receiving device determines whether the PPDU includes the presence indication, specifically, the receiving device determines the SERVICE field in the PPDU. Whether the preset reserved bit has padding 1.

5, through the SERVICE domain indication, but the SERVICE domain does not include the CRC

For Embodiment 5), that is, the embodiment shown in FIG. 17, both Color (6 bits) and presence indication (1 bits) may be included in the reserved bits of the SERVICE field as shown in FIG. 20, and the first Color and presence indications The CRC is carried by the Pad bits.

6, through the RA domain indication in the PSDU

The RA field is located in the PSDU, that is, the MAC part, and has a length of 48 bits, and is used to carry the receiving device address. The highest bit of the RA indicates whether the current RA is a unicast or a multicast address (Individual/Group), as shown in FIG. 21. Normally, the RA field of the control frame such as RTS, CTS, and ACK should be a unicast address, so the Individual/Group is set to 0. This scheme proposes that when the Individual/Group is set to 1, it indicates that the current PPDU contains the first Color. That is Individual/Group is 1 for presence indication.

For example, the sending device fills the PPDU with a presence indication, specifically, the sending device sets the highest bit of the RA in the PPDU to 1. The receiving device determines whether the PPDU includes the presence indication, specifically, whether the receiving device determines whether the highest bit of the RA in the PPDU is 1. .

It can be understood that, in the method for carrying the presence indicator, the presence indication may be filled, or may be filled when the PPDU is generated, or may be filled after the PPDU is generated.

For example, the foregoing examples of the presence indications may be applied to the corresponding embodiments. The padding of the presence indication may be filled when the sending device generates the PPDU, which is not specifically limited in this embodiment of the present application. By the prompt of the presence indication, the PHY of the receiving device determines whether it is necessary to identify the first Color, or whether the corresponding bit sequence of the first Color needs to be transmitted to the MAC layer for identification. In this way, the efficiency of the method for determining the BCC attribution of the control frame provided by the receiving device in the embodiment of the present application is improved.

FIG. 22 is a schematic structural diagram of a device for determining a BSS attribution according to an embodiment of the present disclosure. The device may be used to perform the method performed by the receiving device in any of the foregoing embodiments 1) to 4). Referring to FIG. 22, the device is described as a second device.

The second device includes:

The acquiring unit 2201 is configured to obtain a PPDU of the bearer control frame sent by the first device, where the PPDU includes a Data field, the Data field includes a physical layer aggregation process service data unit PSDU field and a tail padding part, the PSDU field includes a control frame, and the tail padding part includes a first color, where the first color is used to identify a basic service set BSS to which the first device belongs;

The first determining unit 2202 is configured to determine whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs;

The determining unit 2203 is configured to determine that the control frame is from the BSS to which the second device belongs if the first color and the second color are the same.

Optionally, the tail fill portion further includes a check field.

The second device further includes:

a second determining unit 2204, configured to determine, according to the check field, whether the first color is received correctly;

If the first Color is received correctly, the first determining unit 2202 performs a step of determining whether the first Color and the pre-stored second Color are the same.

Optionally, the tail padding part further includes a tail information Tail, the first Color and the check field are located after the Tail, or the first Color and the check field are located before the Tail, and the Tail is used to improve the BCC decoding performance of the receiving end.

Optionally, the end of the tail-filled portion further includes a remaining padding bit Pad, which is an all-zero sequence.

Optionally, the tail padding portion further includes a tail information Tail and a check field. In the tail padding portion, the check field and the first Color are located after the Tail, and the first color is located at the tail of the tail padding portion, and the Tail is used to improve the receiving. BCC decoding performance of the terminal;

The second device further includes:

The decoding unit 2205 is configured to perform BCC decoding on the part before the Tail and the Tail in the Data domain, and perform Tail-biting BCC decoding on the part after the Tail in the Data domain;

The third determining unit 2206 is configured to determine, according to the check field, whether the first color is received correctly;

Optionally, the PPDU further includes a presence indication, and the presence indication is used to indicate that the PPDU includes the first color;

The second device further includes:

The fourth determining unit 2207 is configured to determine whether the PPDU includes a presence indication.

If the PPDU includes a presence indication, the first determining unit 2202 performs a step of determining whether the first Color and the pre-stored second Color are the same.

In summary, the obtaining unit 2201 acquires a PPDU of a bearer control frame sent by the first device, where the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a first color. The first color is used to identify the basic service set BSS to which the first device belongs. Then, the first determining unit 2202 determines whether the first color and the pre-stored second color are the same, and the second color is used to belong to the second device. The BSS performs identification so that if the first Color and the second Color are the same, the determining unit 2203 determines that the control frame is from the BSS to which the second device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective, avoiding interference, and increasing Equipment signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

FIG. 23 is a schematic structural diagram of hardware of a device according to an embodiment of the present disclosure. As shown in FIG. 23, for the convenience of description, only the parts related to the embodiment of the present application are shown. For details of the technical details, please refer to the method part of the embodiment of the present application. The terminal may be any terminal device including a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), an in-vehicle computer, and the terminal is a mobile phone as an example:

FIG. 23 is a block diagram showing a partial structure of a mobile phone related to a terminal provided by an embodiment of the present application. Referring to FIG. 23, the mobile phone includes: a radio frequency (RF) circuit 2310, a memory 2320, an input unit 2330, a display unit 2340, a sensor 2350, an audio circuit 2360, a wireless fidelity (WiFi) module 2370, and a processor 2380. And power supply 2390 and other components. It will be understood by those skilled in the art that the structure of the handset shown in FIG. 23 does not constitute a limitation to the handset, and may include more or less components than those illustrated, or some components may be combined, or different components may be arranged.

The following describes the components of the mobile phone in detail with reference to FIG. 23:

The RF circuit 2310 can be used for receiving and transmitting signals during the transmission or reception of information or during a call. Specifically, after receiving the downlink information of the base station, the processor 2380 processes the data. In addition, the uplink data is designed to be sent to the base station. Generally, RF circuit 2310 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, RF circuitry 2310 can also communicate with the network and other devices via wireless communication. The above wireless communication may use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio SERVICE (GPRS), Code Division Multiple Access (Code Division). Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), E-mail, Short Messaging SERVICE (SMS), and the like.

The memory 2320 can be used to store software programs and modules, and the processor 2380 is stored in the memory 2320 by running. Software programs and modules to perform various functional applications and data processing of the mobile phone. The memory 2320 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to Data created by the use of the mobile phone (such as audio data, phone book, etc.). Further, the memory 2320 may include a high speed random access memory, and may also include a nonvolatile memory such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The input unit 2330 can be configured to receive input numeric or character information and to generate key signal inputs related to user settings and function controls of the handset. Specifically, the input unit 2330 may include a touch panel 2331 and other input devices 2332. The touch panel 2331, also referred to as a touch screen, can collect touch operations on or near the user (such as a user using a finger, a stylus, or the like on the touch panel 2331 or near the touch panel 2331. Operation), and drive the corresponding connecting device according to a preset program. Optionally, the touch panel 2331 may include two parts: a touch detection device and a touch controller. Wherein, the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information. The processor 2380 is provided and can receive commands from the processor 2380 and execute them. In addition, the touch panel 2331 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch panel 2331, the input unit 2330 may also include other input devices 2332. Specifically, other input devices 2332 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.

The display unit 2340 can be used to display information input by the user or information provided to the user as well as various menus of the mobile phone. The display unit 2340 can include a display panel 2341. Alternatively, the display panel 2341 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like. Further, the touch panel 2331 may cover the display panel 2341. When the touch panel 2331 detects a touch operation on or near the touch panel 2331, the touch panel 2331 transmits to the processor 2380 to determine the type of the touch event, and then the processor 2380 according to the touch event. The type provides a corresponding visual output on display panel 2341. Although the touch panel 2331 and the display panel 2341 are used as two independent components to implement the input and input functions of the mobile phone in FIG. 23, in some embodiments, the touch panel 2331 and the display panel 2341 may be integrated. Realize the input and output functions of the phone.

The handset can also include at least one type of sensor 2350, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 2341 according to the brightness of the ambient light, and the proximity sensor may close the display panel 2341 and/or when the mobile phone moves to the ear. Or backlight. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (usually three axes). When it is stationary, it can detect the magnitude and direction of gravity. It can be used to identify the gesture of the mobile phone (such as horizontal and vertical screen switching, related Game, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for the mobile phone can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, no longer Narration.

An audio circuit 2360, a speaker 2361, and a microphone 2362 can provide an audio interface between the user and the handset. The audio circuit 2360 can transmit the converted electrical data of the received audio data to the speaker 2361, and convert it into a sound signal output by the speaker 2361; on the other hand, the microphone 2362 converts the collected sound signal into an electrical signal by the audio circuit. The 2360 is converted to audio data after reception, and then processed by the audio data output processor 2380, transmitted to the other mobile phone via the RF circuit 2310, or outputted to the memory 2320 for further processing.

WiFi is a short-range wireless transmission technology. The mobile phone can help users to send and receive emails, browse web pages and access streaming media through the WiFi module 2370. It provides users with wireless broadband Internet access. Although FIG. 23 shows the WiFi module 2370, it can be understood that it does not belong to the essential configuration of the mobile phone, and may be omitted as needed within the scope of not changing the essence of the invention.

The processor 2380 is the control center of the handset, which connects various portions of the entire handset using various interfaces and lines, by executing or executing software programs and/or modules stored in the memory 2320, and invoking data stored in the memory 2320, The phone's various functions and processing data, so that the overall monitoring of the phone. Optionally, the processor 2380 may include one or more processing units; preferably, the processor 2380 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, and the like. The modem processor primarily handles wireless communications. It will be appreciated that the above described modem processor may also not be integrated into the processor 2380.

The mobile phone also includes a power source 2390 (such as a battery) for powering various components. Preferably, the power source can be logically coupled to the processor 2380 through a power management system to manage functions such as charging, discharging, and power management through the power management system.

Although not shown, the mobile phone may further include a camera, a Bluetooth module, and the like, and details are not described herein again.

It can be understood that, in the embodiments of the present application, the hardware structure of the device in the embodiment shown in FIG. 23 may also be the hardware structure of the base station.

The device shown in FIG. 23 can integrate the functional modules of the above-described configuration shown in FIG. 22, and the device shown in FIG. 23 can also be used to perform the steps of the corresponding devices of any of the above embodiments 1) to 4).

In the embodiment of the present application, the RF circuit 2310 is one of the specific forms of the transceiver, and the transceiver and the processor 2380 included in the device also have the following functions:

Details are as follows:

The transceiver has the following functions:

Acquiring a physical layer convergence process protocol data unit PPDU of the bearer control frame sent by the first device, where the PPDU includes a Data field, the Data field includes a physical layer convergence process service data unit PSDU field and a tail padding part, and the PSDU field includes a control frame and a tail The padding portion includes a first color, and the first color is used to identify a basic service set BSS to which the first device belongs;

The processor 2380 has the following functions:

Determining whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs;

If the first Color and the second Color are the same, it is determined that the control frame is from the BSS to which the second device belongs.

Optionally, the tail padding portion further includes a check field. Before the processor 2380 determines whether the first color and the pre-stored second color are the same, the processor 2380 has the following functions:

Determining whether the first Color is received correctly based on the check field;

If the first Color is received correctly, the processor 2380 performs the step of determining whether the first Color and the pre-stored second Color are the same.

Optionally, the tail padding portion further includes a tail information Tail and a check field. In the tail padding portion, the check field and the first Color are located after the Tail, and the first color is located at the tail of the tail padding portion, and the Tail is used to improve the receiving. BCC decoding performance at the end. Before the processor determines whether the first Color and the pre-stored second Color are the same, the processor 2380 has the following functions:

Perform BCC decoding on the part of Tail before and Tail in the Data domain, and perform Tail-biting BCC decoding on the part after the Tail in the Data domain;

If the first Color is received correctly, the central processing unit 2380 performs a step of determining whether the first Color and the pre-stored second Color are the same.

Optionally, the PPDU further includes a presence indication, where the indication is used to indicate that the PPDU includes the first color, and before the processor 2380 determines whether the first color and the pre-stored second color are the same, the processor 2380 has the following function: determining whether the PPDU is The presence indication is included; if the PPDU includes a presence indication, the processor 2380 performs the step of determining whether the first Color and the pre-stored second Color are the same.

In summary, the transceiver acquires the PPDU of the bearer control frame sent by the first device, where the PPDU includes the Data field, the Data field includes the physical layer aggregation process service data unit PSDU field and the tail padding part, and the PSDU field includes the control frame and the tail. The padding portion includes a first color, the first color is used to identify the basic service set BSS to which the first device belongs, and then the processor 2380 determines whether the first color and the pre-stored second color are the same, and the second color is used for the first color. The BSS to which the two devices belong is identified, so that if the first Color and the second Color are the same, the processor 2380 determines that the control frame is from the BSS to which the second device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective, avoiding interference, and increasing Equipment signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

FIG. 24 is a schematic structural diagram of a device for determining a BSS attribution according to an embodiment of the present disclosure. The device may be used to perform the function of the receiving device in the foregoing embodiment 5). Referring to FIG. 24, the device in the embodiment of the present application is The second device is described,

The second device includes:

The obtaining unit 2401 is configured to obtain a PPDU of the bearer control frame sent by the first device, where the PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding part, the SERVICE field includes a first color, and the PSDU field includes a control frame and a tail. The padding part includes a check field, the first color is used to identify the BSS to which the first device belongs, and the check field is used by the receiving end to verify whether the first color is received correctly.

The first determining unit 2402 is configured to determine, according to the check field, whether the first color is received correctly;

The second determining unit 2403 is configured to determine whether the first color and the pre-stored second color are the same if the first color is received correctly, and the second color is used to identify the BSS to which the second device belongs;

a determining unit 2404, if the first color and the second color are the same, determining that the control frame is from the second device The BSS to which it belongs.

Optionally,

The tail padding part includes the first tail information Tail, the check field and the second Tail in sequence, the first Tail is used to improve the BCC decoding performance of the SERVICE and the PSDU part of the receiving end, and the second Tail is used to improve the check field of the receiving end. BCC decoding performance.

Optionally,

The PPDU further includes an presence indication, and the presence indication is used to indicate that the PPDU includes the first color,

The second device further includes:

The third determining unit 2405 is configured to determine whether the PPDU includes a presence indication.

If the PPDU includes the presence indication, the second determination unit 2403 performs a step of determining whether the first Color and the pre-stored second Color are the same.

In summary, the obtaining unit 2401 acquires the PPDU of the bearer control frame sent by the first device, where the PPDU includes a Data field, the Data field includes a SERVICE domain, a PSDU domain, and a tail padding part, and the SERVICE domain includes a first color, and the PSDU domain includes The control frame, the tail padding portion includes a check field, the first color is used to identify the BSS to which the first device belongs, and the check field is used by the receiving end to verify whether the first color is received correctly. Then, the first determining unit 2402 determines whether the first Color is received correctly based on the check field. If the first color is received correctly, the second determining unit 2403 determines whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs. Thus, if the first Color and the second Color are the same, the determining unit 2404 determines that the control frame is from the BSS to which the second device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the legacy PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective and avoids interference. Increased device signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

The device for determining the BSS ownership of the present application has another embodiment. For a schematic structural diagram of the device, reference may be made to the hardware structure shown in FIG. 23, and the specific hardware structure of the device may refer to the specific hardware structure shown in FIG. This embodiment of the present application will not be described again.

The device in the embodiment of the present application may be integrated with the device structure of the device in the embodiment shown in FIG. 24, and the device in the embodiment of the present application may further perform the steps and functions of the receiving device in the foregoing embodiment 5).

In the embodiment of the present application, the transceiver and the processor included in the device further have the following functions:

Details are as follows:

The transceiver has the following functions:

Obtain a PPDU of a bearer control frame sent by the first device. The PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding portion, the SERVICE field includes a first color, the PSDU field includes a control frame, and the tail padding portion includes a check field, and the first color is used for the first device. The associated BSS performs identification, and the check field is used by the receiving end to verify whether the first Color is received correctly;

The processor has the following functions:

If the first color is received correctly, it is determined whether the first color and the pre-stored second color are the same, the second color Used to identify the BSS to which the second device belongs;

Optionally, the tail padding portion includes a first tail information Tail, a check field, and a second Tail. The first Tail is used to improve the BCC decoding performance of the SERVICE and the PSDU part of the receiving end, and the second Tail is used to improve the receiving end. BCC decoding performance for the check field.

Optionally, the PPDU further includes a presence indication, where the indication is used to indicate that the PPDU includes the first color, and the processor determines whether the first color and the pre-stored second color are the same, the processor further has the following functions:

Determining whether the PPDU includes a presence indication;

If the PPDU includes a presence indication, the processor performs the step of determining whether the first Color and the pre-stored second Color are the same.

In summary, the transceiver acquires the PPDU of the bearer control frame sent by the first device, where the PPDU includes the Data field, the Data field includes the SERVICE domain, the PSDU domain, and the tail padding part, the SERVICE domain includes the first Color, and the PSDU domain includes the control. The frame, the tail padding portion includes a check field, the first color is used to identify the BSS to which the first device belongs, and the check field is used by the receiving end to verify whether the first color is received correctly. Then, the processor determines whether the first Color is received correctly based on the check field. If the first color is received correctly, the processor determines whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs. Thus, if the first Color and the second Color are the same, the central processor determines that the control frame is from the BSS to which the second device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective, avoiding interference, and increasing Equipment signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

FIG. 25 is a schematic structural diagram of an apparatus for sending a control frame according to an embodiment of the present disclosure. The embodiment shown in Fig. 25 can be used to perform the functions of the transmitting device in any of the above embodiments 1) to 4).

The device is described as a first device. Referring to FIG. 25, the first device includes:

The obtaining unit 2501 is configured to acquire a color, where the color is used to identify the BSS to which the first device belongs.

a generating unit 2502, configured to generate a PPDU carrying a control frame according to the color, the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a Color;

The sending unit 2503 is configured to send the PPDU to the second device.

Optionally, the first device further includes:

a first field generating unit 2504, configured to generate a check field according to the Color, where the check field is used by the receiving end to verify whether the Color is received correctly;

The generating unit 2502 is further configured to generate a PPDU carrying a control frame according to the Color and the check field, where the tail padding portion of the PPDU includes a check field.

Optionally, the tail padding part further includes tail information Tail, the Color and check fields are located after the Tail, or the Color and check fields are located before the Tail, and the Tail is used to improve the BCC decoding performance of the receiving end.

Optionally, the first device further includes a second field generating unit 2505 and an encoding unit 2506;

a second field generating unit 2505, configured to generate a check field according to Color;

The generating unit 2502 is further configured to generate a PPDU carrying a control frame according to the Color and the check field, where a tail padding portion of the PPDU includes a check field. In the tail padding part, the check field and the Color are located after the tail information Tail, and the Color is located Tail is used to improve the BCC decoding performance of the receiving end.

The encoding unit 2506 is configured to perform BCC encoding on the Tail portion and the Tail portion in the Data domain, and perform Tail-biting BCC encoding on the portion after the Tail in the Data domain.

Optionally, the PPDU further includes a presence indication, and the presence indication is used to indicate that the PPDU includes Color.

In summary, the obtaining unit 2501 obtains Color, and Color is used to identify the BSS to which the first device belongs. Then, the generating unit 2502 generates a PPDU carrying a control frame according to Color, the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a Color. Next, the transmitting unit 2503 transmits a PPDU to the second device. On the second device, the second device determines whether the color in the PPDU is the same as the pre-stored color. The pre-stored Color is used to identify the BSS to which the second device belongs. If the color in the PPDU is the same as the pre-stored color, Then, the second device determines that the control frame is from the BSS to which the second device belongs; otherwise, determines that the control frame of the PPDU is from the BSS to which the non-second device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective, avoiding interference, and increasing Equipment signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

The device for transmitting a control frame of the present application has another embodiment. For a schematic structural diagram of the device, reference may be made to the hardware structure shown in FIG. 23, and the specific hardware structure of the device may refer to the specific hardware structure shown in FIG. This embodiment of the present application will not be described again.

The device in the embodiment of the present application may be integrated with the device structure of the device in the embodiment shown in FIG. 25, and the device in the embodiment of the present application may further perform the steps and functions of the sending device in the foregoing embodiments 1) to 4).

Details are as follows:

The processor has the following functions:

Obtaining Color, Color is used to identify the BSS to which the first device belongs;

Generating a PPDU carrying a control frame according to Color, the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a Color;

The transceiver has the following functions:

Sending a PPDU to the second device.

Optionally, before the transceiver sends the PPDU to the second device, the processor has the following functions:

Generate a check field according to Color, and the check field is used by the receiving end to verify whether Color is received correctly;

A PPDU carrying a control frame is generated according to the Color and the check field, and the tail padding portion of the PPDU further includes a check field.

Generate a check field according to Color;

A PPDU carrying a control frame is generated according to the Color and check fields. The tail padding part of the PPDU includes a check field. In the tail padding part, the check field and Color are located after the tail information Tail, and the Color is located at the end of the tail padding part, Tail Used to improve the BCC decoding performance of the receiving end;

Perform BCC encoding on the part before the Tail and Tail in the Data domain, and Tail-biting BCC encoding the part after the Tail in the Data domain.

In summary, the processor obtains Color, and Color is used to identify the BSS to which the first device belongs. Then, the processor generates a PPDU carrying a control frame according to Color, the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a Color. The transceiver then sends a PPDU to the second device. On the second device, the second device determines whether the color in the PPDU and the pre-stored color are the same. The pre-stored Color is used to identify the BSS to which the second device belongs; if the color in the PPDU is the same as the pre-stored Colorr, Then, the second device determines that the control frame is from the BSS to which the second device belongs; otherwise, determines that the control frame of the PPDU is from the BSS to which the non-second device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective, avoiding interference, and increasing Equipment signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

FIG. 26 is a schematic structural diagram of an apparatus for sending a control frame according to an embodiment of the present disclosure. The apparatus shown in Fig. 26 can be used to perform the functions of the transmitting apparatus of the above embodiment 5). Referring to FIG. 26, the device in this embodiment is described as a first device, where the first device includes:

The obtaining unit 2601 is configured to acquire a color, where the color is used to identify the BSS to which the first device belongs.

a field generating unit 2602, configured to generate a check field according to the Color, where the check field is used by the receiving end to verify whether the Color is received correctly;

The generating unit 2603 is configured to generate a PPDU carrying a control frame according to the Color and the check field, where the PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding part, the SERVICE field includes a Color, and the PSDU field includes a control frame, and a tail padding Part includes the check field;

The sending unit 2604 is configured to send the PPDU to the second device.

In summary, the obtaining unit 2601 acquires Color, and Color is used to identify the BSS to which the first device belongs. Then, the field generating unit 2602 generates a check field according to Color, and the check field is used by the receiving end to verify whether Color is correctly received. And, the generating unit 2603 generates a PPDU carrying a control frame according to the Color and the check field, where the PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding part, the SERVICE field includes a Color, and the PSDU field includes a control frame, and a tail. The padding section includes a check field. Then, the sending unit 2604 goes to the second device Send a PPDU. On the second device, the second device determines whether the color in the PPDU is the same as the pre-stored color, and the pre-stored color is used to identify the BSS to which the second device belongs; if the color in the PPDU is the same as the pre-stored color, The second device determines that the control frame is from the BSS to which the second device belongs; otherwise, determines that the control frame of the PPDU is from the BSS to which the non-second device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective, avoiding interference, and increasing Equipment signal transmission opportunities. The color is set in the tail padding part of the PPDU or the SERVICE field, so that the PPDU has the characteristics of backward compatibility and transmission overhead.

The device in the embodiment of the present application may be integrated with the device structure of the device in the embodiment shown in FIG. 26, and the device in the embodiment of the present application may further perform the steps and functions of the sending device in the foregoing embodiment 5).

Details are as follows:

The processor has the following functions:

Generating a PPDU carrying a control frame according to the Color and the check field, the PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding portion, the SERVICE field includes a Color, the PSDU field includes a control frame, and the tail padding portion includes a check field.

The transceiver has the following functions:

Sending a PPDU to the second device.

In summary, the processor obtains Color, and Color is used to identify the BSS to which the first device belongs. Then, the processor generates a check field according to Color, and the check field is used by the receiving end to verify whether Color is received correctly. And, the processor generates a PPDU carrying a control frame according to the Color and the check field, where the PPDU includes a Data field, the Data field includes a SERVICE field, a PSDU field, and a tail padding part, the SERVICE field includes a Color, and the PSDU field includes a control frame, and a tail padding Part includes the check field. Followed. The transceiver sends a PPDU to the second device. On the second device, the second device determines whether the color in the PPDU is the same as the pre-stored color. The pre-stored Color is used to identify the BSS to which the second device belongs. If the color in the PPDU is the same as the pre-stored color, Then, the second device determines that the control frame is from the BSS to which the second device belongs; otherwise, determines that the control frame of the PPDU is from the BSS to which the non-second device belongs. In this way, through the comparison of Color, the device can effectively distinguish the control frame sent in the PPDU format to perform corresponding operations according to the home BSS of the control frame, for example, setting the correct NAV, so that the dual NAV mechanism is more effective, avoiding interference, and increasing Equipment signal transmission opportunities. And set the Color to the tail padding part of the PPDU or the SERVICE field. The PPDU has the characteristics of backward compatibility and constant transmission overhead.

The embodiment of the present application further provides a communication system. The architecture of the communication system may refer to the architecture diagram shown in FIG. 1.

The communication system includes a first device and a second device,

The first device is a transmitting device, which is shown in any of the foregoing embodiments. For details, refer to the foregoing exemplary embodiments, and details are not described herein again.

The second device is the receiving device shown in any of the foregoing embodiments, which is described in detail in the foregoing exemplary embodiments, and details are not described herein again.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be stored by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

Claims

A method for determining a BSS attribution, the method comprising:

The second device acquires a physical layer convergence process protocol data unit PPDU of the bearer control frame sent by the first device, where the PPDU includes a data domain, where the data domain includes a physical layer convergence process service data unit PSDU domain and a tail padding part, The PSDU field includes a control frame, and the tail padding portion includes a first color, where the first color is used to identify a basic service set BSS to which the first device belongs;

The second device determines whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs;

If the first color and the second color are the same, the second device determines that the control frame is from a BSS to which the second device belongs.
The method of claim 1 wherein

The tail fill portion further includes a check field,

Before the second device determines whether the first color and the pre-stored second color are the same, the method further includes:

Determining, by the second device, whether the first color is received correctly based on the check field;

If the first Color is received correctly, the second device performs a step of determining whether the first Color and the pre-stored second Color are the same.
The method of claim 2 wherein:

The tail padding portion further includes a tail information Tail, the first Color and the check field are located after the Tail, or the first Color and the check field are located before the Tail, the Tail It is used to improve the BCC decoding performance of the receiving end.
A method according to any one of claims 1 to 3, characterized in that

The end of the tail-fill portion further includes a remaining padding bit Pad, which is an all-zero sequence.
The method of claim 1 wherein

The tail padding portion further includes a tail information Tail and a check field, in the tail padding portion, the check field and the first Color are located after the Tail, and the first color is located at the tail Filling the tail of the portion, the Tail is used to improve the BCC decoding performance of the receiving end;

Before the second device determines whether the first color and the pre-stored second color are the same, the method further includes:

The second device performs BCC decoding on the part of the Taail before the Tail and the part of the Tail, and performs Tail-biting BCC decoding on the part after the Tail in the Data domain;

Determining, by the second device, whether the first color is received correctly based on the check field;

If the first Color is received correctly, the second device performs a step of determining whether the first Color and the pre-stored second Color are the same.
A method according to any one of claims 1 to 3,

The PPDU further includes a presence indication, the presence indication is used to indicate that the PPDU includes the first color, and the second device determines whether the first color and the pre-stored second color are the same, the method further include:

Determining, by the second device, whether the PPDU includes the presence indication;

If the PPDU includes the presence indication, the second device performs determining the first color and pre-stored The second color is the same step.
A method for determining a BSS attribution, the method comprising:

The second device acquires a PPDU of a bearer control frame sent by the first device, where the PPDU includes a Data field, where the Data field includes a SERVICE domain, a PSDU domain, and a tail padding part, where the SERVICE domain includes a first color, and the PSDU domain The control frame includes a check field, where the first color is used to identify the BSS to which the first device belongs, and the check field is used by the receiving end to verify whether the first color is received. correct

Determining, by the second device, whether the first color is received correctly based on the check field;

If the first color is received correctly, the second device determines whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs;

If the first color and the second color are the same, the second device determines that the control frame is from a BSS to which the second device belongs.
The method of claim 7 wherein:

The tail padding portion includes a first tail information Tail, a check field, and a second Tail, where the first Tail is used to improve BCC decoding performance of the SERVICE and PSDU portions at the receiving end, and the second Tail is used for The BCC decoding performance of the check field is improved at the receiving end.
Method according to claim 7 or 8, characterized in that

The PPDU further includes a presence indication, the presence indication is used to indicate that the PPDU includes the first color, and the second device determines whether the first color and the pre-stored second color are the same, the method further include:

Determining, by the second device, whether the PPDU includes the presence indication;

If the PPDU includes the presence indication, the second device performs a step of determining whether the first Color and the pre-stored second Color are the same.
A method for transmitting a control frame, the method comprising:

The first device acquires a color, where the color is used to identify the BSS to which the first device belongs;

The first device generates a PPDU carrying a control frame according to the Color, the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a Color

The first device sends the PPDU to a second device.
The method of claim 10 wherein:

Before the first device sends the PPDU to the second device, the method further includes:

The first device generates a check field according to the Color, where the check field is used by the receiving end to verify whether the Color is received correctly;

The generating, by the first device, the PPDU of the bearer control frame according to the color, includes:

The first device generates a PPDU carrying a control frame according to the Color and the check field, and the tail padding portion of the PPDU further includes the check field.
The method of claim 11 wherein

The tail filling portion further includes a tail information Tail,

The Color and the check field are located after the Tail, or the Color and the check field are located Before the Tail, the Tail is used to improve the BCC decoding performance of the receiving end.
A method according to any one of claims 10 to 12, wherein

The end of the tail-fill portion further includes a remaining padding bit Pad, which is an all-zero sequence.
The method of claim 10 wherein:

Before the first device sends the PPDU to the second device, the method further includes:

The first device generates a check field according to the Color;

The generating, by the first device, the PPDU of the bearer control frame according to the color, includes:

Generating, by the first device, a PPDU carrying a control frame according to the Color and the check field, where a tail padding portion of the PPDU includes the check field, and in the tail padding part, the check field and The color is located after the tail information Tail, and the color is located at the tail of the tail-filling portion, and the Tail is used to improve the BCC decoding performance of the receiving end;

The first device performs BCC encoding on the part of the Taail before the Tail and the part of the Tail, and performs Tail-biting BCC encoding on the part after the Tail in the Data domain.
A method according to any one of claims 10 to 12, wherein

The PPDU further includes a presence indication, the presence indication indicating that the PPDU includes the Color.
A method for transmitting a control frame, the method comprising:

The first device acquires a color, where the color is used to identify the BSS to which the first device belongs;

The first device generates a check field according to the Color, where the check field is used by the receiving end to verify whether the Color is received correctly;

The first device generates a PPDU carrying a control frame according to the Color and the check field, where the PPDU includes a Data field, and the Data field includes a SERVICE domain, a PSDU domain, and a tail padding part, where the SERVICE domain includes a Color, the PSDU field includes a control frame, and the tail padding portion includes the check field;

The first device sends the PPDU to a second device.
The method of claim 16 wherein:

The tail padding portion includes a first tail information Tail, a check field, and a second Tail, where the first Tail is used to improve BCC decoding performance of the SERVICE and PSDU portions at the receiving end, and the second Tail is used for The BCC decoding performance of the check field is improved at the receiving end.
A method according to claim 16 or 17, wherein

The PPDU further includes a presence indication, the presence indication indicating that the PPDU includes the Color.
A device for determining the affiliation of a BSS, wherein the device is a second device, and the second device includes:

An acquiring unit, configured to acquire a physical layer convergence process protocol data unit PPDU of a bearer control frame sent by the first device, where the PPDU includes a data domain, where the data domain includes a PSDU domain and a tail padding part of a physical layer convergence process service data unit, The PSDU field includes a control frame, and the tail padding portion includes a first color, where the first color is used to identify a basic service set BSS to which the first device belongs;

a first determining unit, configured to determine whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs;

a determining unit, configured to determine that the control frame is from a BSS to which the second device belongs if the first color and the second color are the same.
The device according to claim 19, characterized in that

The tail fill portion further includes a check field,

The second device further includes:

a second determining unit, configured to determine, according to the check field, whether the first color is received correctly;

If the first Color is received correctly, the first determining unit performs a step of determining whether the first Color and the pre-stored second Color are the same.
The device according to claim 19, characterized in that

The tail padding portion further includes a tail information Tail and a check field, in the tail padding portion, the check field and the first Color are located after the Tail, and the first color is located at the tail Filling the tail of the portion, the Tail is used to improve the BCC decoding performance of the receiving end;

The second device further includes:

a decoding unit, configured to perform BCC decoding on a portion of the Data field before the Tail and a portion of the Tail, and perform Tail-biting BCC decoding on a portion after the Tail in the Data domain;

The third determining unit is configured to determine, according to the check field, whether the first color is received correctly;

If the first Color is received correctly, the first determining unit performs a step of determining whether the first Color and the pre-stored second Color are the same.
Apparatus according to any one of claims 19 to 21,

The PPDU further includes a presence indication, where the presence indication is used to indicate that the PPDU includes the first color, and the second device further includes:

a fourth determining unit, configured to determine whether the PPDU includes the presence indication;

If the PPDU includes the presence indication, the first determining unit performs a step of determining whether the first Color and the pre-stored second Color are the same.
A device for determining the affiliation of a BSS, wherein the device is a second device, and the second device includes:

An acquiring unit, configured to acquire a PPDU of a bearer control frame sent by the first device, where the PPDU includes a Data field, where the Data field includes a SERVICE domain, a PSDU domain, and a tail padding part, where the SERVICE domain includes a first color, The PSDU field includes a control frame, and the tail padding portion includes a check field, the first color is used to identify a BSS to which the first device belongs, and the check field is used by the receiving end to verify the first color. Whether it is received correctly;

a first determining unit, configured to determine, according to the check field, whether the first color is received correctly;

a second determining unit, configured to determine whether the first color and the pre-stored second color are the same if the first color is received correctly, and the second color is used to identify the BSS to which the second device belongs ;

a determining unit, configured to determine that the control frame is from a BSS to which the second device belongs if the first color and the second color are the same.
The device according to claim 23, wherein

The tail padding portion sequentially includes a first tail information Tail, the check field, and a second Tail, the first Tail The Bail decoding performance of the SERVICE and the PSDU part is improved by the receiving end, and the second Tail is used to improve the BCC decoding performance of the check field by the receiving end.
Device according to claim 23 or 24, characterized in that

The PPDU further includes a presence indication, the presence indication indicating that the PPDU includes the first color,

The second device further includes:

a third determining unit, configured to determine whether the PPDU includes the presence indication;

If the PPDU includes the presence indication, the second determining unit performs a step of determining whether the first Color and the pre-stored second Color are the same.
A device for transmitting a control frame, where the device is a first device, and the first device includes:

An acquiring unit, configured to acquire a color, where the color is used to identify a BSS to which the first device belongs;

a generating unit, configured to generate a PPDU carrying a control frame according to the Color, where the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes a Color

And a sending unit, configured to send the PPDU to the second device.
The device according to claim 26, wherein

The first device further includes:

a first field generating unit, configured to generate a check field according to the Color, where the check field is used by the receiving end to verify whether the color is received correctly;

The generating unit is further configured to generate a PPDU carrying a control frame according to the Color and the check field, where a tail padding portion of the PPDU includes the check field.
The device according to claim 26, wherein

The first device further includes a second field generating unit and an encoding unit,

The second field generating unit is configured to generate a check field according to the Color;

The generating unit is further configured to generate a PPDU carrying a control frame according to the Color and the check field, where a tail padding portion of the PPDU includes the check field, and in the tail padding part, the school The field and the color are located after the tail information Tail, and the color is located at the tail of the tail padding portion, and the Tail is used to improve the BCC decoding performance of the receiving end;

The coding unit is configured to perform BCC coding on the part of the Taail before the Tail and the part of the Tail, and perform Tail-biting BCC coding on a part after the Tail in the Data domain.
Apparatus according to any one of claims 26 to 28, wherein

The PPDU further includes a presence indication, the presence indication indicating that the PPDU includes the Color.
A device for transmitting a control frame, where the device is a first device, and the first device includes:

An acquiring unit, configured to acquire a color, where the color is used to identify a BSS to which the first device belongs;

a field generating unit, configured to generate a check field according to the Color, where the check field is used by the receiving end to verify whether the color is received correctly;

a generating unit, configured to generate a PPDU carrying a control frame according to the Color and the check field, where the PPDU includes a Data field, where the Data field includes a SERVICE domain, a PSDU domain, and a tail padding part, and the SERVICE domain Including the Color, the PSDU field includes a control frame, and the tail padding portion includes the check field;

And a sending unit, configured to send the PPDU to the second device.
The device according to claim 30, wherein

The tail padding portion includes a first tail information Tail, a check field, and a second Tail, where the first Tail is used to improve BCC decoding performance of the SERVICE and PSDU portions at the receiving end, and the second Tail is used for The BCC decoding performance of the check field is improved at the receiving end.
Device according to claim 30 or 31, characterized in that

The PPDU further includes a presence indication, the presence indication indicating that the PPDU includes the Color.
A device for determining a BSS attribution, wherein the device is a second device, the device includes a transceiver, a processor, and a memory, where the memory stores a program for determining a BSS attribution,

The transceiver is configured to acquire a PPDU of a bearer control frame sent by the first device, where the PPDU includes a Data field, where the Data field includes a physical layer convergence process service data unit PSDU field and a tail padding part, where the PSDU domain includes a control frame, the tail padding portion includes a first color, where the first color is used to identify a basic service set BSS to which the first device belongs;

The processor reads the program stored by the memory, and the processor performs the following steps:

Determining whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs;

If the first color and the second color are the same, it is determined that the control frame is from a BSS to which the second device belongs.
A device for determining a BSS attribution, wherein the device is a second device, the device includes a transceiver, a processor, and a memory, where the memory stores a program for determining a BSS attribution,

The transceiver is configured to acquire a PPDU of a bearer control frame sent by the first device, where the PPDU includes a Data field, where the Data field includes a SERVICE domain, a PSDU domain, and a tail padding part, where the SERVICE domain includes a first color, The PSDU field includes a control frame, and the tail padding portion includes a check field, where the first color is used to identify a BSS to which the first device belongs, and the check field is used by the receiving end to verify the Whether a Color is received correctly;

The processor reads the program stored by the memory, and the processor performs the following steps:

Determining whether the first color is received correctly based on the check field;

If the first color is received correctly, determining whether the first color and the pre-stored second color are the same, and the second color is used to identify the BSS to which the second device belongs;

If the first color and the second color are the same, it is determined that the control frame is from a BSS to which the second device belongs.
An apparatus for transmitting a control frame, wherein the device is a first device, the device includes a transceiver, a processor, and a memory, where the memory stores a program,

The processor reads the program stored by the memory, and the processor performs the following steps:

Obtaining a color, where the color is used to identify the BSS to which the first device belongs;

Generating a PPDU carrying a control frame according to the Color, the PPDU includes a Data field, the Data field includes a PSDU field and a tail padding portion, the PSDU field includes a control frame, and the tail padding portion includes the Color;

The transceiver is configured to send the PPDU to a second device.
An apparatus for transmitting a control frame, wherein the device is a first device, the device includes a transceiver, a processor, and a memory, where the memory stores a program,

The processor reads the program stored by the memory, and the processor performs the following steps:

Obtaining a color, where the color is used to identify the BSS to which the first device belongs;

Generating a check field according to the Color, where the check field is used by the receiving end to verify whether the Color is received correctly;

Generating a PPDU carrying a control frame according to the Color and the check field, where the PPDU includes a Data field, the Data field includes a SERVICE domain, a PSDU domain, and a tail padding portion, and the SERVICE domain includes the Color, The PSDU field includes a control frame, and the tail padding portion includes the check field;

The transceiver is configured to send the PPDU to a second device.
A computer readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any of claims 1-18.
A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-18.