CN106685578B

CN106685578B - PPDU transmission method and device, wireless access point and station

Info

Publication number: CN106685578B
Application number: CN201510749671.2A
Authority: CN
Inventors: 张佳胤; 朱俊; 罗俊; 刘乐
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-11-06
Filing date: 2015-11-06
Publication date: 2020-04-28
Anticipated expiration: 2035-11-06
Also published as: WO2017076020A1; CN106685578A

Abstract

The invention provides a PPDU transmission method, a PPDU transmission device, a wireless access point and a station. The method includes transmitting a first preamble portion; transmitting the HE-SIGA after transmitting the first preamble; after the HE-SIGA is sent, the HE-SIGB is sent, wherein the HE-SIGB is composed of N HE-SIGB segments, each HE-SIGB segment is independently coded, and the N HE-SIGB segments are respectively used for scheduling the N time segments in sequence; and after the HE-SIGB is sent, sequentially transmitting the 1 st to the N time segments according to the scheduling of the N HE-SIGB segments. By adopting the transmission method provided by the embodiment of the invention, the receiving end can only receive and analyze part of the HE-SIGB segment without receiving and analyzing the whole content of the HE-SIGB, thereby greatly reducing the expense of the data transmission process.

Description

PPDU transmission method and device, wireless access point and station

Technical Field

The present invention relates to the field of mobile communications, and in particular, to a PPDU transmission method and apparatus, a wireless access point, and a station.

Background

The IEEE802.11 series of standards are currently widely used in Unlicensed Band (Unlicensed Band) for Wireless Local Access Network (WLAN) communication. Most versions of the IEEE802.11 series of standards employ Orthogonal Frequency Division Multiplexing (OFDM) techniques. By adopting the OFDM technology, the transmitting end can modulate a plurality of modulation symbol Constellation points (Constellation) transmitted to the receiving end to a plurality of mutually orthogonal subcarriers for parallel transmission so as to improve the data transmission efficiency.

In order to make the data transmission manner more flexible, the IEEE802.11ax standard specifies that Orthogonal Frequency Division Multiple Access (OFDMA) technology can be used between the transmitting end and the receiving end for data transmission, that is, the transmitting end can Multiplex modulation constellation symbols of multiple receiving ends on different Orthogonal subcarriers for parallel transmission. When the OFDMA technique is used for Data transmission, a Physical Layer (PHY) at the transmitting end may encapsulate a Physical Layer Convergence Protocol (PLCP) service Data Unit (PLCP Protocol Data Unit, abbreviated as PPDU) generated by a Media Access Control (MAC) Layer at the transmitting end into a PLCP Protocol Data Unit (PPDU) according to a PHY transmission format defined by the IEEE802.11ax standard, and transmit the PLCP Protocol Data Unit, abbreviated as PPDU, to the receiving end through an antenna.

When the OFDMA technique is used for data transmission, the PPDU generally includes a Legacy Preamble (L-Pre), a Repeated Legacy signaling Field (RLSIG), a High Efficiency signaling Field a (HE-SIGA), a High Efficiency signaling Field B (HE-SIGB), a High Efficiency Short Training Field (HE-STF), a High Efficiency Long Training Field (HE-LTF), and a load (Payload). The HE-SIGA carries common configuration information of the whole PPDU, for example, a Modulation and Coding Scheme (MCS) used by the HE-SIGB and the number of OFDM symbols occupied by the HE-SIGB, and the receiving end may further analyze subsequent contents of the PPDU according to the contents carried by the HE-SIGA. The HE-SIGB mainly carries bandwidth resources indicating respective PSDUs used by a target receiving end, and a transmission method used by each PSDU, such as MCS, number of space-time streams, and the like, and the receiving end can judge whether the PPDU carries the PSDU which the receiving end needs to receive according to the HE-SIGB; if the receiving end finds that the PPDU carries the PSDU which the receiving end needs to receive through the HE-SIGB analysis, the receiving end can further carry out Automatic Gain Control (AGC) through the HE-STF, and carry out channel estimation through the HE-LTF, thereby receiving the PSDU carried in the load.

Since HE-SIGB needs to carry bandwidth resources indicating the use of respective PSDUs at the target receiving end and the transmission method used by each PSDU, it can be seen that the HE-SIGB contains information related to the number of receiving ends that the PPDU needs to support. As the number of users supported by the PPDU increases, the amount of data included in the HE-SIGB increases. The increase of the data amount contained in the HE-SIGB causes a corresponding increase of the time required for transmitting and parsing the HE-SIGB, thereby resulting in a larger overhead of the data transmission process.

Disclosure of Invention

The embodiment of the invention provides a PPDU (PPDU) transmission method, a PPDU transmission device, a wireless access point and a station, and aims to solve the problem that the overhead of a data transmission process is high when more users are supported by the PPDU in the prior art.

In a first aspect, an embodiment of the present invention provides a PPDU transmission method, where the method includes: transmitting a first preamble part; after the first preamble part is sent, sending a high-efficiency signaling domain A HE-SIGA, wherein the HE-SIGA is used for indicating the symbol number of a high-efficiency signaling domain B HE-SIGB and the coding modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB; after the HE-SIGA is sent, the HE-SIGB is sent, wherein the HE-SIGB consists of N HE-SIGB segments, each HE-SIGB segment is independently coded and comprises a public domain, and N is more than or equal to 1; the N HE-SIGB segments are respectively and sequentially used for scheduling the N time segments; and after the HE-SIGB is sent, sequentially transmitting the 1 st to the N time segments according to the scheduling of the N HE-SIGB segments, wherein each time segment comprises a high-efficiency short training field HE-STF, a high-efficiency long training field HE-LTF and a load field.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the HE-SIGA includes a first indication field and an MCS field, where the first indication field is used to indicate whether more than one time segment will be transmitted after HE-SIGB transmission is completed; the MCS field is used for indicating the MCS adopted by the first HE-SIGB segment; the public domain of each HE-SIGB segment at least comprises one of an MCS domain or a symbol number domain; the symbol number field in the kth HE-SIGB segment is used for indicating the symbol number of the kth HE-SIGB segment or indicating the total symbol number from the kth +1 HE-SIGB segment to the Nth HE-SIGB segment; and the MCS field in the kth HE-SIGB segment is used for indicating the MCS of the kth +1 HE-SIGB segment, the MCS of the kth HE-SIGB segment is not higher than the MCS of the kth +1 HE-SIGB segment, and k is more than or equal to 1 and less than or equal to N-1.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the HE-SIGA includes a second indication field and an MCS field, where the second indication field is used to indicate whether a first HE-SIGB segment is a last HE-SIGB segment; the MCS field is used for indicating the MCS adopted by the first HE-SIGB segment; the HE-SIGB segment comprises a public domain, and the public domain at least comprises one of an MCS domain, a symbol number domain or a third indication domain; the symbol number field in the kth HE-SIGB segment is used for indicating the symbol number of the kth HE-SIGB segment or indicating the total symbol number from the kth +1 HE-SIGB segment to the Nth HE-SIGB segment; the MCS field in the kth HE-SIGB segment is used for indicating the MCS of the kth +1 HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the MCS of the kth +1 HE-SIGB segment, wherein k is more than or equal to 1 and less than or equal to N-1; and the third indication field in the kth HE-SIGB segment is used for indicating whether the kth +1 HE-SIGB segment is the last HE-SIGB segment.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the HE-SIGA includes an MCS field; wherein the MCS field is to indicate a MCS of a first of the HE-SIGB segments; the HE-SIGB segment comprises a public domain, and the public domain at least comprises one of an MCS domain, a symbol number domain or a third indication domain; the symbol number field in the kth HE-SIGB segment is used for indicating the symbol number of the kth HE-SIGB segment or indicating the total symbol number from the kth +1 HE-SIGB segment to the Nth HE-SIGB segment; the MCS field in the kth HE-SIGB segment is used for indicating the MCS of the kth +1 HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the MCS of the kth +1 HE-SIGB segment, wherein k is more than or equal to 1 and less than or equal to N-1; a third indication field in the kth HE-SIGB segment is used to indicate whether the kth HE-SIGB segment is the last HE-SIGB segment.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the HE-SIGA includes a first indication field and N HE-SIGBHE-SIGB segment configuration fields; wherein the first indication field is used for indicating whether more than one time segment is transmitted after the HE-SIGB transmission is completed; each HE-SIGB segmentation configuration field at least comprises one of an MCS field or a symbol number field; wherein, the MCS field of the kth HE-SIGB segment configuration field is used for indicating the MCS adopted by the kth HE-SIGB segment; and the symbol number field of the kth HE-SIGB segment configuration field is used for indicating the symbol number of the kth HE-SIGB segment.

With reference to any one of the first to fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, each of the HE-SIGB segments further includes a time segment length field in the public domain; and the time segment length field in the kth HE-SIGB segment is used for indicating the time length of the time segment scheduled by the kth HE-SIGB segment or indicating the data symbol number of the time segment scheduled by the kth HE-SIGB segment.

With reference to the first aspect, in a sixth possible implementation manner of the first aspect, the HE-SIGA includes a fourth indication field, an MCS field, and an HE-SIGB symbol number field; the fourth indication field is used for indicating the number of segments contained in the HE-SIGB, or indicating the number of time segments to be sent after the HE-SIGB is sent; the MCS field is used for indicating MCS adopted by the first HE-SIGB segment; the HE-SIGB symbol number field is used for indicating the total occupied symbol number of all HE-SIGB segments; the first HE-SIGB segment includes a common domain; wherein the common domain comprises N-1 transmission configuration domains, and each transmission configuration domain at least comprises one of an MCS domain or a symbol number domain; the MCS field of the kth transmission configuration field is used for indicating the MCS adopted by the kth +1 HE-SIGB segment; the symbol number field of the kth transmission configuration field is used to indicate the symbol number of the (k + 1) th HE-SIGB segment or the symbol number of the kth HE-SIGB segment.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, each transmission configuration field further includes a time segment length field; wherein, the time segment length field of the kth transmission configuration field is used for indicating the time length of the time segment scheduled by the kth HE-SIGB segment.

With reference to the first aspect or any one of the first to seventh possible implementation manners of the first aspect, in an eighth possible implementation manner of the first aspect, when the downlink PPDU and the uplink PPDU are sent in series, the load includes a load of the uplink PPDU and a load of the uplink PPDU; wherein each HE-SIGB segment is used for scheduling a time segment contained in one downlink PPDU load or scheduling a time segment contained in one uplink PPDU load.

With reference to the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, each of the public domains of the HE-SIGB segments further includes an uplink and downlink indication domain and a resource allocation information RA domain; wherein, the uplink and downlink indication domain of the kth HE-SIGB segment is used for indicating that the time segment scheduled by the kth HE-SIGB segment belongs to a downlink PPDU load or an uplink PPDU load; and the RA field of the kth HE-SIGB segment is used for indicating the resource allocation information of the resource units in the time segment scheduled by the kth HE-SIGB segment.

In a second aspect, an embodiment of the present invention provides another PPDU transmission method, where the method includes: receiving a first preamble portion; when the PPDU is judged to be of the appointed type according to the first preamble part, receiving and analyzing a high-efficiency signaling domain AHE-SIGA; receiving and analyzing HE-SIGB segments contained in a high-efficiency signaling domain B HE-SIGB according to a coding modulation scheme MCS indicated by the HE-SIGA and the symbol number of the HE-SIGB; and after receiving an HE-SIGB subsection containing scheduling information matched with a receiving end, transmitting a time subsection bearing receiving end data according to the scheduling information in the HE-SIGB subsection matched with the receiving end, wherein the time subsection bearing the receiving end data is one of N time subsections contained in a PPDU, and N is more than or equal to 1.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the receiving and analyzing the HE-SIGB segment included in the HE-SIGB according to the coding modulation scheme MCS indicated by the HE-SIGA and the number of symbols of the HE-SIGB includes: after receiving the HE-SIGA, receiving a first HE-SIGB segment, wherein the symbol number of the first HE-SIGB segment is obtained by subtracting the symbol number indicated by the HE-SIGB symbol number field of the HE-SIGA from the symbol number indicated by the symbol number field in the public domain in the first HE-SIGB segment, or is obtained from the symbol number field in the public domain of the first HE-SIGB segment; after receiving the first HE-SIGB segment, analyzing the first HE-SIGB segment according to a coding modulation scheme MCS indicated by the HE-SIGA; judging whether the first HE-SIGB segment contains scheduling information matched with a receiving end according to an analysis result obtained by analyzing the first HE-SIGB segment; the time segment for transmitting and bearing the data of the receiving end according to the scheduling information in the HE-SIGB segment matched with the receiving end comprises the following steps: and if the first HE-SIGB segment contains scheduling information matched with the receiving end, transmitting the time segment scheduled by the scheduling information.

With reference to the second aspect, in a second possible implementation manner of the second aspect, if the kth HE-SIGB segment does not contain scheduling information matched with a receiving end, the kth +1 HE-SIGB segment is received, where a symbol number of the kth +1 segment is indicated by a symbol number field in a common domain of the kth HE-SIGB segment, or a symbol number indicated by a symbol number field in the common domain of the kth HE-SIGB segment is subtracted from a symbol number indicated by a symbol number field in the common domain of the kth HE-SIGB segment, or is obtained by a symbol number field of the kth or k +1 transmission configuration field of the first HE-SIGB segment, where k +1 is not greater than N; analyzing the k +1 th HE-SIGB segment according to the MCS domain in the k-th HE-SIGB segment public domain or the MCS domain indicated by the MCS domain of the k-th transmission configuration domain of the first HE-SIGB segment; judging whether the (k + 1) th HE-SIGB segment contains scheduling information matched with a receiving end according to an analysis result obtained by analyzing the (k + 1) th HE-SIGB segment; the time segmentation which is transmitted and matched with the receiving end according to the scheduling of the HE-SIGB segmentation matched with the receiving end comprises the following steps: and if the (k + 1) th HE-SIGB segment contains scheduling information matched with a receiving end, transmitting the time segment scheduled by the scheduling information.

With reference to the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the transmitting the time segment scheduled by the scheduling information includes: determining the starting time of the time segment scheduled by the (k + 1) th HE-SIGB segment according to the time length or the symbol number indicated by the time segment length field in the 1 to k HE-SIGB segment public fields and the time length or the symbol number indicated by the time segment length field in the (k + 1) th HE-SIGB segment; transmitting the time segment scheduled by the (k + 1) th HE-SIGB segment within the time length or the number of symbols indicated by the time segment length field from the starting time.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the method further includes: and stopping receiving the (k + 1) th to Nth HE-SIGB segments if the public domain resolution of the k-th HE-SIGB segment is wrong.

With reference to the second aspect or the first or second possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the method further includes: and if the HE-SIGB does not contain the HE-SIGB segment matched with the receiving end, discarding the PPDU.

With reference to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, if the high-efficiency signaling domain B does not contain an HE-SIGB segment matched with a receiving end, discarding the PPDU includes: and if the Nth HE-SIGB segment is determined to be the last HE-SIGB segment of the HE-SIGB segments according to the indication of the Nth-1 or Nth HE-SIGB segment, and the Nth HE-SIGB segment does not contain scheduling information matched with a receiving end, discarding the PPDU.

In a third aspect, an embodiment of the present invention provides a PPDU transmission apparatus, including: a preamble transmitting unit for transmitting a first preamble part; a first signaling domain sending unit, configured to send a high efficiency signaling domain a HE-SIGA after sending the first preamble, where the HE-SIGA is used to indicate a symbol number of a high efficiency signaling domain B HE-SIGB and a coding modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB; a second signaling domain sending unit, configured to send the HE-SIGB after sending the HE-SIGA, where the HE-SIGB is formed by N HE-SIGB segments, each HE-SIGB segment is independently coded, and each HE-SIGB segment includes a public domain, where N is greater than or equal to 1; the N HE-SIGB segments are respectively and sequentially used for scheduling N time segments; and a transmission unit, configured to transmit the 1 st to N time segments in sequence according to the scheduling of the N HE-SIGB segments, respectively, after the HE-SIGB is sent, where each time segment includes a high-efficiency short training field HE-STF, a high-efficiency long training field HE-LTF, and a load field.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the HE-SIGA includes a first indication field and an MCS field, where the first indication field is used to indicate whether more than one time segment will be transmitted after the HE-SIGB transmission is completed; the MCS field is used for indicating the MCS adopted by the first HE-SIGB segment; the public domain of each HE-SIGB segment at least comprises one of an MCS domain or a symbol number domain; the symbol number field in the kth HE-SIGB segment is used for indicating the symbol number of the kth HE-SIGB segment or indicating the total symbol number from the kth +1 HE-SIGB segment to the Nth HE-SIGB segment; and the MCS field in the kth HE-SIGB segment is used for indicating the MCS of the kth +1 HE-SIGB segment, the MCS of the kth HE-SIGB segment is not higher than the MCS of the kth +1 HE-SIGB segment, and k is more than or equal to 1 and less than or equal to N-1.

With reference to the third aspect, in a second possible implementation manner of the third aspect, the HE-SIGA includes a second indication field and an MCS field, where the second indication field is used to indicate whether a first HE-SIGB segment is a last HE-SIGB segment; the MCS field is used for indicating the MCS adopted by the first HE-SIGB segment; the HE-SIGB segment comprises a public domain, and the public domain at least comprises one of an MCS domain, a symbol number domain or a third indication domain; the symbol number field in the kth HE-SIGB segment is used for indicating the symbol number of the kth HE-SIGB segment or indicating the total symbol number from the kth +1 HE-SIGB segment to the Nth HE-SIGB segment; the MCS field in the kth HE-SIGB segment is used for indicating the MCS of the kth +1 HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the MCS of the kth +1 HE-SIGB segment, wherein k is more than or equal to 1 and less than or equal to N-1; and the third indication field in the kth HE-SIGB segment is used for indicating whether the kth +1 HE-SIGB segment is the last HE-SIGB segment.

With reference to the third aspect, in a third possible implementation manner of the third aspect, the HE-SIGA includes an MCS field; wherein the MCS field is to indicate a MCS of a first of the HE-SIGB segments; the HE-SIGB segment comprises a public domain, and the public domain at least comprises one of an MCS domain, a symbol number domain or a third indication domain; the symbol number field in the kth HE-SIGB segment is used for indicating the symbol number of the kth HE-SIGB segment or indicating the total symbol number from the kth +1 HE-SIGB segment to the Nth HE-SIGB segment; the MCS field in the kth HE-SIGB segment is used for indicating the MCS of the kth +1 HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the MCS of the kth +1 HE-SIGB segment, wherein k is more than or equal to 1 and less than or equal to N-1; a third indication field in the kth HE-SIGB segment is used to indicate whether the kth HE-SIGB segment is the last HE-SIGB segment.

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the HE-SIGA includes a first indication field and N HE-SIGBHE-SIGB segment configuration fields; wherein the first indication field is used for indicating whether more than one time segment is transmitted after the HE-SIGB transmission is completed; each HE-SIGB segmentation configuration field at least comprises one of an MCS field or a symbol number field; wherein, the MCS field of the kth HE-SIGB segment configuration field is used for indicating the MCS adopted by the kth HE-SIGB segment; and the symbol number field of the kth HE-SIGB segment configuration field is used for indicating the symbol number of the kth HE-SIGB segment.

With reference to any one of the first to fourth possible implementation manners of the third aspect, in a fifth possible implementation manner of the third aspect, each of the HE-SIGB segments further includes a time segment length field in the public domain; and the time segment length field in the kth HE-SIGB segment is used for indicating the time length of the time segment scheduled by the kth HE-SIGB segment or indicating the data symbol number of the time segment scheduled by the kth HE-SIGB segment.

With reference to the third aspect, in a sixth possible implementation manner of the third aspect, the HE-SIGA includes a fourth indication field, an MCS field, and an HE-SIGB symbol number field; the fourth indication field is used for indicating the number of segments contained in the HE-SIGB, or indicating the number of time segments to be sent after the HE-SIGB is sent; the MCS field is used for indicating MCS adopted by the first HE-SIGB segment; the HE-SIGB symbol number field is used for indicating the total occupied symbol number of all HE-SIGB segments; the first HE-SIGB segment includes a common domain; wherein the common domain comprises N-1 transmission configuration domains, and each transmission configuration domain at least comprises one of an MCS domain or a symbol number domain; the MCS field of the kth transmission configuration field is used for indicating the MCS adopted by the kth +1 HE-SIGB segment; the symbol number field of the kth transmission configuration field is used to indicate the symbol number of the (k + 1) th HE-SIGB segment or the symbol number of the kth HE-SIGB segment.

With reference to the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, each transmission configuration field further includes a time segment length field; wherein, the time segment length field of the kth transmission configuration field is used for indicating the time length of the time segment scheduled by the kth HE-SIGB segment.

With reference to the third aspect or any one of the first to fourth possible implementation manners of the third aspect, in an eighth possible implementation manner of the third aspect, when the downlink PPDU and the uplink PPDU are sent in series, the load includes a load of the uplink PPDU and a load of the uplink PPDU; wherein each HE-SIGB segment is used for scheduling a time segment contained in one downlink PPDU load or scheduling a time segment contained in one uplink PPDU load.

With reference to the eighth possible implementation manner of the third aspect, in a ninth possible implementation manner of the third aspect, each public domain of the HE-SIGB segments further includes an uplink and downlink indication domain and a resource allocation information RA domain; wherein, the uplink and downlink indication domain of the kth HE-SIGB segment is used for indicating that the time segment scheduled by the kth HE-SIGB segment belongs to a downlink PPDU load or an uplink PPDU load; and the RA field of the kth HE-SIGB segment is used for indicating the resource allocation information of the resource units in the time segment scheduled by the kth HE-SIGB segment.

In a fourth aspect, an embodiment of the present invention provides another PPDU transmission apparatus, including: a preamble receiving unit for receiving a first preamble part; a first signaling domain receiving unit, configured to receive and analyze a high efficiency signaling domain a HE-SIGA when the PPDU is determined to be of the specified type according to the first preamble part; a second signaling domain receiving unit, configured to receive and parse an HE-SIGB segment included in the high-efficiency signaling domain B HE-SIGB according to a coding modulation scheme MCS indicated by the HE-SIGA and a symbol number of the HE-SIGB; and the transmission unit is used for determining and transmitting the time segment for bearing the receiving end data according to the scheduling information in the HE-SIGB segment matched with the receiving end after receiving the HE-SIGB segment containing the scheduling information matched with the receiving end, wherein the time segment for bearing the receiving end data is one of N time segments contained in the PPDU, and N is more than or equal to 1.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the second signaling domain receiving unit includes: a second signaling domain receiving subunit, configured to receive, after receiving the HE-SIGA, a first HE-SIGB segment, where a symbol number of the first HE-SIGB segment is obtained by subtracting a symbol number indicated by a HE-SIGB symbol number domain of the HE-SIGA from a symbol number indicated by a symbol number domain in a public domain in the first HE-SIGB segment, or is obtained from the symbol number domain in the public domain of the first HE-SIGB segment; the analysis subunit is used for analyzing the first HE-SIGB segment according to the coding modulation scheme MCS indicated by the HE-SIGA after receiving the first HE-SIGB segment; a judging subunit, configured to judge whether the first HE-SIGB segment includes scheduling information matched with a receiving end according to an analysis result obtained by analyzing the first HE-SIGB segment; the transmission unit is specifically configured to transmit the time segment scheduled by the scheduling information when the first HE-SIGB segment includes the scheduling information matched with the receiving end.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the second signaling domain receiving subunit is further configured to receive a k +1 th HE-SIGB segment when the k th HE-SIGB segment does not include scheduling information matched with a receiving end, where a symbol number of the k +1 th segment is indicated by a symbol number field in a k +1 th HE-SIGB segment common domain, or is obtained by subtracting a symbol number indicated by a symbol number field in the k +1 th HE-SIGB segment common domain from a symbol number indicated by a symbol number field in the k +1 th HE-SIGB segment common domain, or is obtained by a symbol number field of a k-th or k +1 th transmission configuration domain of the first HE-SIGB segment; the parsing subunit is further configured to parse the (k + 1) th HE-SIGB segment according to an MCS field in the kth HE-SIGB segment public domain or an MCS field indicated by the MCS field of the kth transmission configuration field of the first HE-SIGB segment; the judging subunit is further configured to judge whether the (k + 1) th HE-SIGB segment includes scheduling information matched with a receiving end according to an analysis result obtained by analyzing the (k + 1) th HE-SIGB segment; the transmission unit is further configured to receive a time segment scheduled by the scheduling information when the (k + 1) th HE-SIGB segment contains the scheduling information matched with the receiving end.

With reference to the first or second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the transmission unit includes: a determining subunit, configured to determine, according to the time length or the number of symbols indicated by the time segment length field in the 1 st to k-th HE-SIGB segment public domains and the time length or the number of symbols indicated by the time segment length field in the k +1 th HE-SIGB segment, a starting time of a time segment scheduled by the k +1 th HE-SIGB segment; a transmitting subunit, configured to transmit, from the start time, the time segment scheduled by the (k + 1) th HE-SIGB segment within the time length or the number of symbols indicated by the time segment length field.

With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the apparatus further includes: and the control unit is used for stopping receiving the (k + 1) th to the Nth HE-SIGB segments when the public domain of the kth HE-SIGB segment is analyzed to be wrong.

With reference to the fourth aspect or the first or second possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the apparatus further includes: and the processing unit is used for discarding the PPDU when the HE-SIGB does not contain the HE-SIGB segment matched with the receiving end.

With reference to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the processing unit is specifically configured to discard the PPDU when it is determined that the nth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB segments according to an instruction of the nth-1 or nth HE-SIGB segment, and the nth HE-SIGB segment does not include scheduling information matched with a receiving end.

In a fifth aspect, an embodiment of the present invention further provides a wireless access point, where the wireless access point includes a communication module, where the communication module is configured to send a first preamble part; after the first preamble part is sent, sending a high-efficiency signaling domain A HE-SIGA, wherein the HE-SIGA is used for indicating the symbol number of a high-efficiency signaling domain B HE-SIGB and the coding modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB; after the HE-SIGA is sent, the HE-SIGB is sent, wherein the HE-SIGB consists of N HE-SIGB segments, each HE-SIGB segment is independently coded and comprises a public domain, and N is more than or equal to 1; the N HE-SIGB segments are respectively and sequentially used for scheduling N time segments; and after the HE-SIGB is sent, sequentially transmitting the 1 st to the N time segments according to the scheduling of the N HE-SIGB segments, wherein each time segment comprises a high-efficiency short training field HE-STF, a high-efficiency long training field HE-LTF and a load field.

In a sixth aspect, an embodiment of the present invention provides a station, where the station includes a communication module, where the communication module is configured to receive a first preamble; when the PPDU is judged to be of the appointed type according to the first preamble part, receiving and analyzing a high-efficiency signaling domain A HE-SIGA; receiving and analyzing HE-SIGB segments contained in a high-efficiency signaling domain B HE-SIGB according to a coding modulation scheme MCS indicated by the HE-SIGA and the symbol number of the HE-SIGB; after receiving the HE-SIGB segment containing scheduling information matched with the receiving end, determining and transmitting the time segment bearing the receiving end data according to the scheduling information in the HE-SIGB segment matched with the receiving end, wherein the time segment bearing the receiving end data is one of N time segments contained in a PPDU, and N is more than or equal to 1.

In the embodiment of the invention, a first preamble part is sent; after the first preamble part is sent, sending a high-efficiency signaling domain A HE-SIGA; after the HE-SIGA is sent, the HE-SIGB is sent, wherein the HE-SIGB consists of N HE-SIGB segments, and each HE-SIGB segment is independently coded; transmitting the 1 st to N time segments after the HE-SIGB transmission is completed. By adopting the transmission method provided by the embodiment of the invention, the receiving end can only receive and analyze partial HE-SIGB segments without receiving and analyzing the whole content of the HE-SIGB, thereby greatly reducing the overhead of the data transmission process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a PPDU in accordance with the present invention;

FIG. 2 is a flow chart illustrating a PPDU transmission method according to an embodiment of the present invention;

FIG. 3 is a schematic view showing a structure of HE-SIGA in PPDU according to the present invention;

FIG. 4 is a schematic view showing another structure of HE-SIGA in PPDU according to the present invention;

FIG. 5 is a schematic view showing another structure of HE-SIGA in PPDU according to the present invention;

FIG. 6 is a schematic view showing another structure of HE-SIGA in PPDU according to the present invention;

FIG. 7 is a schematic diagram of a structure of HE-SIGB segment in a PPDU according to the present invention;

FIG. 8 is a schematic diagram of a structure of a HE-SIGB segmented common domain in a PPDU according to the present invention;

FIG. 9 is a schematic diagram of another structure of the HE-SIGB segmented common domain in the PPDU of the present invention;

FIG. 10 is a schematic diagram of another structure of the HE-SIGB segmented common domain in the PPDU according to the present invention;

FIG. 11 is a schematic diagram of the scheduling relationship between the HE-SIGB segment and the time segment according to the present invention;

FIG. 12 is another schematic diagram of the scheduling relationship between the HE-SIGB segment and the time segment according to the present invention;

fig. 13 is a flowchart illustrating a PPDU transmission method according to another embodiment of the present invention;

fig. 14 is a schematic structural diagram of a PPDU transmission apparatus according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of another embodiment of a PPDU transmission apparatus according to the present invention;

fig. 16 is a schematic diagram of a transmission system according to the present invention.

Detailed Description

In the embodiment of the present invention, the sending end may be an Access Point (AP for short); accordingly, the receiving end may be a Station (Station, abbreviated as STA).

In the embodiment of the present invention, the PPDU may include an uplink PPDU and a downlink PPDU, and for convenience of description, if there is no specific description, the PPDU referred to in the implementation of the present invention may be either an uplink PPDU or a downlink PPDU.

As shown in fig. 1, in the embodiment of the present invention, the PPDU may include a preamble and a payload, where the preamble includes a first preamble, an HE-SIGA and an HE-SIGB, and the payload may include N time segments (timesegments); accordingly, the HE-SIGB in the preamble may also be composed of N HE-SIGB segments (segments). Each HE-SIGB segment corresponds to one time segment, and the N HE-SIGB segments are respectively and sequentially used for scheduling the N time segments, namely the kth HE-SIGB segment is used for scheduling the kth time segment, wherein k and N are positive integers, k is larger than or equal to 1, and N is larger than or equal to 1.

Referring to fig. 2, a flowchart of an embodiment of a PPDU transmission method according to the present invention is shown. This embodiment may be performed by the transmitting end. As shown in fig. 2, the present embodiment may include the following steps:

step 201, a first preamble of a PPDU is transmitted.

Wherein the first preamble part may include a part other than the HE-SIGA and the HE-SIGB of the PPDU preamble part. The content contained in the first preamble portion of the PPDU may be determined according to IEEE802.11 series of standards. For example, the preamble of the PPDU may include L-Pre, RLSIG, HE-SIGA, and HE-SIGB, as defined by the IEEE802.11ax standard, and thus the first preamble of the PPDU may include L-Pre and RLSIG. Of course, the preamble of the PPDU may also include other possible configurations.

When the first preamble part includes L-Pre and RLSIG, the transmitting end first transmits the L-Pre and transmits the RLSIG after the L-Pre transmission is completed. Wherein, the L-Pre is composed of a traditional Short Training Field (L-STF for Short), a traditional long Training Field (L-LTF for Short) and a traditional signaling Field (L-SIG for Short). The receiving end can use the L-STF to perform time-frequency synchronization and Automatic Gain Control (AGC), use the L-LTF to perform frequency-domain fine synchronization and channel estimation to demodulate all Control information before the HE-STF/HE-LTF domain, and use the LENGTH domain in the L-SIG to obtain the time LENGTH that the receiver needs to accept from the end of the L-SIG domain to the end of the whole PPDU. The contents and functions of the L-Pre and RLSIG can be referred to the prior art or the specification of IEEE802.11 series of standards, and are not described herein again.

Step 202, after transmitting the first preamble part, transmitting the HE-SIGA of the PPDU.

And the transmitting end transmits the HE-SIGA after the transmission of the first preamble part is finished. The HE-SIGA is used for indicating the MCS of at least one HE-SIGB segment in the HE-SIGB and the symbol number of the whole HE-SIGB. The HE-SIGA may be composed of a plurality of domains, and the domains and the content indicated by each domain included in the HE-SIGA are different according to the needs.

The HE-SIGA may include an MCS field indicating an MCS used by a first of the HE-SIGB segments. Optionally, as shown in fig. 3, in addition to the MCS field, the HE-SIGA may further include a first indication field, where the first indication field is used to indicate whether more than one time segment will be transmitted after the HE-SIGB transmission is completed. Optionally, as shown in fig. 4, in addition to the MCS field, the HE-SIGB may also include a second indication field, where the second indication field is used to indicate whether the first HE-SIGB segment of the HE-SIGB is the last HE-SIGB segment of the HE-SIGB, that is, whether the HE-SIGB has only one segment.

As shown in fig. 5, the HE-SIGA may also include a first indication field and N HE-SIGB segment configuration fields. Wherein the first indication field is used to indicate whether the HE-SIGB contains more than one HE-SIGB segment. Each HE-SIGB segment configuration field at least comprises one of an MCS field or a symbol number field, wherein the MCS field of the kth HE-SIGB segment configuration field is used for indicating the MCS used by the kth HE-SIGB segment; and the symbol number field of the kth HE-SIGB segment configuration field is used for indicating the symbol number of the kth HE-SIGB segment.

As shown in fig. 6, the HE-SIGA may also include a fourth indication field, an MCS field, and an HE-SIGB symbol number field. The fourth indication field is used for indicating the number of the HE-SIGB segments contained in the HE-SIGB, or indicating the number of the time segments which need to be sent after the HE-SIGB is sent. When the HE-SIGB only schedules resources in the downlink PPDU (does not adopt a serial structure), the number of HE-SIGB segments is equal to the number of time segments in the downlink PPDU. When the HE-SIGB simultaneously schedules the resources adopting the serial structure, the number of the HE-SIGB segments is equal to the sum of the number of the time segments contained in the scheduled uplink and downlink PPDU. The MCS field is used for indicating MCS adopted by the first HE-SIGB segment; and the HE-SIGB symbol number field is used for indicating the HE-SIGB, namely the total occupied symbol number of all the HE-SIGB segments.

And 203, after the HE-SIGA is sent, sending the HE-SIGB of the PPDU.

The HE-SIGB may be formed by N HE-SIGB segments, where, as shown in fig. 7, each HE-SIGB segment includes a Common Field (Common for short) and at least one User specific Field (User for short). Each user-specific domain in the HE-SIGB segmented public domain corresponds to one receiving end. The user-specific domain may include, in addition to a station identification (STA ID) of a receiving end corresponding to the user-specific domain, information related to receiving or parsing a time segment scheduled by the HE-SIGB segment, such as: number of space-time streams (NSTS); transmit Beamforming (TxBF), Modulation and Coding Scheme (MCS), Coding, and other information are transmitted.

The number of the user-specific fields in the kth HE-SIGB segment may be the same as the number of PSDUs included in the time segment scheduled by the kth HE-SIGB segment. When the scheduled time segment of the kth HE-SIGB segment includes x PSDUs, the kth HE-SIGB segment may include x user-specific fields. When the time segment scheduled by the kth HE-SIGB segment includes y PSDUs, the kth HE-SIGB segment may include y user-specific fields. The values of x and y can be set according to requirements, wherein x is more than or equal to 1 and y is more than or equal to 1 under normal conditions.

The public domain of the kth HE-SIGB segment may include a plurality of domains, and these domains may be respectively used to indicate the Number of symbols (Number of HE-LTF Symbol), the HE-LTF Compression Mode (HE-LTF Compression Mode), or the Guard Interval (GI), of the HE-LTF in the time segment scheduled by the kth HE-SIGB segment.

The public domain may also include other content accordingly, depending on the content included in the HE-SIGA.

As shown in fig. 8, when the HE-SIGA includes one MCS field and one first indication field, each of the common fields may include at least one of the MCS field, the symbol number field, or the third indication field. The symbol number field in the k-th HE-SIGB segment public field is used for indicating the symbol number of the k-th HE-SIGB segment or indicating the total symbol number from the k + 1-th HE-SIGB segment to the N-th HE-SIGB segment, and k is more than or equal to 1 and less than or equal to N-1. The MCS field in the common field of the kth HE-SIGB segment is used to indicate the MCS of the kth +1 HE-SIGB segment. Optionally, the common field of each HE-SIGB segment may further include a third indication field, and the third indication field in the common field of the kth HE-SIGB segment is used to indicate whether the kth HE-SIGB segment is a last HE-SIGB segment of the HE-SIGB.

When the HE-SIGA includes the MCS field and the second indication field, the common field may include at least one of the MCS field, the symbol number field, or the third indication field. And the symbol number field in the kth HE-SIGB segment is used for indicating the symbol number of the kth HE-SIGB segment or indicating the total symbol number from the kth +1 HE-SIGB segment to the Nth HE-SIGB segment. The MCS field in the kth HE-SIGB segment is used to indicate the MCS of the (k + 1) th HE-SIGB segment. And the third indication field in the kth HE-SIGB segment is used for indicating whether the kth +1 HE-SIGB segment is the last HE-SIGB segment.

As shown in fig. 9, when the HE-SIGA includes the first indication field and the MCS field, the common field of each HE-SIGB segment may include at least one of the MCS field or the symbol number field. And the symbol number field in the kth HE-SIGB segment is used for indicating the symbol number of the kth HE-SIGB segment or indicating the total symbol number from the kth +1 HE-SIGB segment to the Nth HE-SIGB segment. And the MCS field in the kth HE-SIGB segment is used for indicating the MCS of the kth and +1 HE-SIGB segments, wherein k is more than or equal to 1 and less than or equal to N-1.

It should be noted that, when the MCS of the k +1 th HE-SIGB segment is indicated by a certain field of the k-th HE-SIGB segment common field, the premise that the receiving end correctly demodulates the k +1 th HE-SIGB segment is that the common field of the k-th HE-SIGB segment can be correctly analyzed, and therefore, it is required to ensure that the MCS of the k-th HE-SIGB segment is not higher than the MCS of the k +1 th HE-SIGB segment.

As shown in fig. 10, when the HE-SIGA includes a fourth indication field, an MCS field, and an HE-SIGB symbol number field, the common field of the first HE-SIGB segment may include N-1 transmission configuration fields. Each of the transmission configuration fields may comprise at least one of an MCS field or a symbol number field; the MCS field of the kth transmission configuration field is used for indicating the MCS adopted by the kth +1 HE-SIGB segment; the symbol number field of the kth transmission configuration field is used to indicate the symbol number of the (k + 1) th HE-SIGB segment or the symbol number of the kth HE-SIGB segment.

In addition to the foregoing, the common domain of each of the HE-SIGB segments may include a time segment length domain. The time segment length field in the kth HE-SIGB segment may be used to indicate the time length of the time segment scheduled by the kth HE-SIGB segment, or may also be used to indicate the number of data symbols of the time segment scheduled by the kth HE-SIGB segment. It should be noted that, when the HE-SIGA includes the fourth indication field, the MCS field, and the HE-SIGB symbol number field, the time segment length field of the kth transmission configuration field may be used only to indicate the time length of the time segment scheduled by the kth HE-SIGB segment.

And step 204, after the HE-SIGB is sent, sequentially transmitting the 1 st to the N time segments according to the scheduling of the N HE-SIGB segments respectively.

After each HE-SIGB segment contained in the HE-SIGB is sent, the sending end can send each time segment one by one until each time segment is sent, so that the receiving end receives the time segments matched with the receiving end according to the scheduling of the HE-SIGB. When the transmitting end separately transmits the downlink PPDU and the uplink PPDU, the scheduling relationship between the HE-SIGB segment and the time segment may be as shown in fig. 11.

In addition to independently transmitting the uplink PPDU and the downlink PPDU, an uplink and downlink serial structure (framing) may be adopted between the transmitting end and the receiving end to transmit the downlink PDDU and the uplink PPDU, that is, the uplink PPDU is transmitted immediately after the transmission of the downlink PPDU is completed. For example, after the AP has sent the downlink PPDU to the STA, the STA immediately starts sending the uplink PPDU to the AP.

Therefore, in another embodiment, when the sending end transmits the downlink PDDU and the uplink PPDU in a serial structure, the uplink PPDU may include a preamble and an uplink time segment, and the sending end may uniformly schedule each time segment of the downlink PDDU and each time segment of the uplink PPDU using the HE-SIGA and HE-SIGB segments of the downlink PPDU. When the sending end sends the downlink PPDU and the uplink PPDU by using the uplink and downlink tandem structure, the scheduling relationship between the HE-SIGB and the time segments may be as shown in fig. 12, where, among N time segments scheduled by the N HE-SIGB segments, the 1 st to m time segments are time segments of the downlink PPDU, and the m +1 th to N time segments are time segments of the uplink PPDU.

When a sending end sends a PDDU by adopting an uplink and downlink serial structure, the public domain of the kth HE-SIGB subsection also comprises an uplink and downlink indication domain and a resource allocation information RA indication domain; wherein, the uplink and downlink indication domain in the kth HE-SIGB segment is used for indicating that the time segment scheduled by the HE-SIGB belongs to a downlink PPDU or an uplink PPDU; and the RA indication field in the kth HE-SIGB segment is used for indicating the resource allocation information of the resource units in the time segment scheduled by the HE-SIGB.

It should be noted that the time segment for transmitting PPDU in step 204 may only include a time segment for a downlink PPDU transmitted by the AP to the STA, or may include a time segment for an uplink PPDU transmitted by the STA to the AP. Of course, the transmitting end may also transmit other data, for example, a preamble of the uplink PPDU, between the time segment in which the AP transmits the downlink PPDU and the time segment in which the STA transmits the uplink PPDU.

By adopting the embodiment, the sending end sends the HE-SIGB in a segmented form, each HE-SIGB segment is independently coded, and the receiving end can receive and analyze the HE-SIGB segments one by one to acquire the scheduling information matched with the receiving end. By adopting the mode, the receiving end can obtain the scheduling information matched with the receiving end by receiving and analyzing part of the HE-SIGB segments without receiving and analyzing the whole HE-SIGB, thereby greatly reducing the expense of the data transmission process.

Referring to fig. 13, a flow diagram of one embodiment of a PPDU transmission method. The method described in this embodiment may be performed by a receiving end of a PPDU. As shown in fig. 1, the present embodiment may include the following steps:

step 1301, a first preamble portion is received.

When the first preamble portion comprises the L-Pre and the RLSIG, the receiving end receives the L-Pre first and receives the RLSIG after the L-Pre reception is completed.

Step 1302, receiving and parsing a high efficiency signaling domain a HE-SIGA when the PPDU is determined to be of the designated type according to the first preamble of the PPDU.

Wherein the specified type may be a PPDU type conforming to a specified communication standard. For example, a PPDU type compliant with the ieee802.11ax standard. After receiving the RLSIG, the receiving end may determine whether the PPDU is a PPDU compliant with the IEEE802.11ax standard according to the correlation between the RLSIG and the L-SIG field in the L-Pre. If the PPDU does not conform to the IEEE802.11ax standard, the PPDU may be processed in a receiving and parsing manner corresponding to the format of the PPDU. If the PPDU conforms to the IEEE802.11ax standard, the PPDU is considered as a designated type, and the receiving end can further receive and analyze the HE-SIGA according to the method of the invention.

The specific determination process for determining whether the PPDU conforms to the IEEE802.11ax standard PPDU may refer to the existing transmission process of the PPDU conforming to the IEEE802.11ax standard, which is not described herein again.

And a step 1303 of receiving and analyzing the HE-SIGB segments contained in the high-efficiency signaling domain BHE-SIGB according to the MCS indicated by the HE-SIGA and the symbol number of the HE-SIGB.

After the HE-SIGA receiving end finishes receiving, the receiving end firstly receives a first HE-SIGB segment; and after receiving the first HE-SIGB segment, analyzing the first HE-SIGB segment according to the coding modulation scheme MCS indicated by the HE-SIGA. The receiving end can firstly analyze the HE-SIGB public domain with fixed length according to the MCS in the HE-SIGA, then determine the symbol number of the first HE-SIGB segment according to the content contained in the first HE-SIGB public domain, and further analyze other contents in the first HE-SIGB segment, thereby obtaining the analysis result of the first HE-SIGB segment. Judging whether the first HE-SIGB segment contains scheduling information matched with a receiving end according to an analysis result obtained by analyzing the first HE-SIGB segment; if the first HE-SIGB segment contains information for scheduling the receiving end, the receiving end may not receive the HE-SIGB segment any more, but wait for receiving the time segment scheduled by the scheduling information.

When the symbol number field in the public field of the first HE-SIGB segment is used for indicating the symbol number of the first HE-SIGB segment, the receiving end can directly obtain the symbol number of the first HE-SIGB segment from the symbol number field in the HE-SIGB segment; when the symbol number field in the public field of the first HE-SIGB segment is used for indicating the symbol numbers from the second HE-SIGB segment to the Nth HE-SIGB segment, the receiving end can subtract the symbol number indicated by the symbol number field in the first HE-SIGB segment from the symbol number indicated by the HE-SIGA to obtain the symbol number of the first HE-SIGB segment.

And if the kth HE-SIGB segment does not contain the information of the scheduling receiving end, the receiving end receives the kth HE-SIGB segment, wherein k is more than or equal to 1 and is less than or equal to N-1.

Similarly, when the symbol number field in the k-th HE-SIGB segment public domain is used for indicating the symbol number of the k-th HE-SIGB segment, the receiving end can directly obtain the symbol number of the k-th HE-SIGB segment from the symbol number field in the HE-SIGB segment public domain; when the symbol number field in the k-th HE-SIGB segment public field is used for indicating the symbol numbers from the k +1 th HE-SIGB segment to the N-th HE-SIGB segment, the receiving end can subtract the symbol number indicated by the symbol number field in the k-th HE-SIGB segment from the symbol number indicated by the HE-SIGA to obtain the symbol number of the k-th HE-SIGB segment.

When there is an MCS field in the k-th public domain of the HE-SIGB, the MCS indicated by the MCS field in the k-th HE-SIGB can be used to parse the public domain of the k + 1-th HE-SIGB segment; and then determining the symbol number of the (k + 1) th HE-SIGB segment, and completing the analysis of the (k + 1) th HE-SIGB segment to obtain the analysis result of the (k + 1) th HE-SIGB segment.

Or, when the first HE-SIGB segment includes N-1 transmission configuration fields, the MCS indicated by the MCS field of the kth transmission configuration field and the symbol number of the kth or kth +1 transmission configuration field may be used to complete the parsing of the kth +1 HE-SIGB segment, so as to obtain the parsing result of the kth +1 HE-SIGB segment. Specifically, after receiving the first HE-SIGB segment, the receiving end may first demodulate the public domain of the first HE-SIGB through the number of HE-SIGB segments (in the fourth indication domain) carried in the HE-SIGA and the MCS, to obtain information of N-1 transmission configuration domains. If the symbol number carried by the symbol number field in the kth transmission configuration field is the symbol number of the kth HE-SIGB segment, subtracting the sum of the symbol numbers in all N-1 transmission configuration fields of the HE-SIGB symbol number field in the HE-SIGA to obtain the length of the first HE-SIGB segment, and demodulating the first HE-SIGB segment according to the MCS in the HE-SIGA; and the k +1 th HE-SIGB segment can be demodulated by the MCS and the symbol number carried in the k-th transmission configuration field carried by the first HE-SIGB segment. If the symbol number carried by the symbol number field in the kth transmission configuration field is the symbol number of the kth HE-SIGB segment, the kth HE-SIGB segment can be demodulated according to the MCS and the symbol number in the kth transmission configuration field, and the length of the last HE-SIGB segment (the Nth HE-SIGB segment) can be obtained by subtracting the total symbol number of the first to N-1 HE-SIGB segments from the HE-SIGB symbol number in the HE-SIGA, wherein the sum of the symbol numbers respectively indicated in the 1 st to N-1 transmission configuration fields is the total symbol number of the first to N-1 HE-SIGB segments.

If the receiving end finds that the kth HE-SIGB segment contains the scheduling information matched with the receiving end after analyzing the received HE-SIGB segment, the receiving end can not receive the (k + 1) th to the Nth HE-SIGB segments any more.

Because the reception and the analysis of the k +1 th HE-SIGB segment depend on the content contained in the public domain of the k-th HE-SIGB segment, if a receiving end has an error in analyzing the public domain of the k-th HE-SIGB segment, the k +1 th segment can not be correctly received and analyzed. Thus. If the common domain resolution of the kth HE-SIGB segment is erroneous, reception of the (k + 1) th to Nth HE-SIGB segments may be stopped.

If the receiving end determines that the Nth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB segment according to the information carried by the Nth HE-SIGB segment or the Nth HE-SIGB segment, and finds that the Nth HE-SIGB segment does not contain scheduling information matched with the receiving end after the receiving and the analyzing of the Nth HE-SIGB segment are completed, the PPDU does not contain a PSDU which needs to be received by the receiving end, and the receiving end can discard the PPDU at this moment.

When the HE-SIGB segment contains a third indication domain, the receiving end determines whether the Nth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB segment according to the indication of the third indication domain in the N-1 th or Nth HE-SIGB segment public domain.

When the HE-SIGB segment does not include the third indication field, it may be determined whether the nth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB segment according to the content indicated by the symbol number field in the N-1 th or nth HE-SIGB segment common field.

For example, when the symbol number field in the kth HE-SIGB segment is used to indicate the total symbol number from the kth HE-SIGB segment to the nth HE-SIGB segment, the receiving end may determine whether the kth HE-SIGB segment is the last segment in the entire HE-SIGB by determining whether the content indicated by the symbol number field in the kth HE-SIGB segment is 0. If the content indicated by the symbol number field in the kth HE-SIGB segment is 0, the kth +1 HE-SIGB segment is the last segment in the whole HE-SIGB; if the content indicated by the symbol number field in the kth HE-SIGB segment is not 0, the kth +1 HE-SIGB segment is not the last segment in the whole HE-SIGB.

For another example, when the symbol number field in the kth HE-SIGB segment is used to indicate the symbol number of the kth HE-SIGB segment, the receiving end may determine whether the kth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB according to whether the total symbol number of the 1 st to k-1 th HE-SIGB segments subtracted from the total symbol number of the HE-SIGB indicated by the HE-SIGB symbol number field in the HE-SIGA is equal to the symbol number of the kth HE-SIGB segment. If yes, the k-th HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB; if not, it indicates that the k-th HE-SIGB segment is not the last HE-SIGB segment of the HE-SIGB.

When the sending end sends the PDDU by adopting an uplink and downlink serial structure, the receiving end can also determine that the time segment scheduled by the kth HE-SIGB segment belongs to a downlink PPDU load or an uplink PPDU load according to the content indicated by the uplink and downlink indication fields in the kth HE-SIGB segment.

And 1304, after receiving the HE-SIGB segment containing the scheduling information matched with the receiving end, transmitting the time segment bearing the data of the receiving end according to the scheduling information in the HE-SIGB segment matched with the receiving end.

After receiving the HE-SIGB segment containing scheduling information matched with the receiving end, the receiving end can determine the starting time of the time segment scheduled by the (k + 1) th HE-SIGB segment according to the time length or the symbol number indicated by the time segment length field in the (1) th to k-th HE-SIGB segments and the time length or the symbol number indicated by the time segment length field in the (k + 1) th HE-SIGB segment; and from the starting time, carrying out time segment transmission within the time length indicated by the time segment length field or carrying out time segment transmission within the symbol number indicated by the time segment length field, thereby completing the transmission of the time segments scheduled by the k +1 HE-SIGB segments. When the time segment scheduled by the (k + 1) th HE-SIGB segment is the time segment of the downlink PPDU, the receiving end receives the time segment sent by the sending end; and when the time segment scheduled by the k +1 HE-SIGB segments is the time segment of the uplink PPDU, the receiving end sends the time segment to the sending end.

When the time segment length field in the k-th HE-SIGB segment public field is used for indicating the symbol number of the time segment scheduled by the k-th HE-SIGB segment, the receiving end can calculate the starting time of the time segment scheduled by the k-th HE-SIGB segment through the symbol number indicated by the time segment length field in the first to k-1 HE-SIGB segment public fields, the symbol number of the HE-LTF, the HE-LTF compression mode and Payload GI information. Wherein the start time refers to a time at which transmission of a segment of the time begins.

The starting time of the kth time segment is T after the L-SIG is ended_start(k) Initially, the specific calculation is shown as follows:

wherein, T_RLSIGThe time length of the RLSIG field may be, for example, 4 us; t is_HE-SIGAThe time length of HE-SIGA domain may be, for example, 8us or 16 us; t is_HE-SIGBThe symbol length of HE-SIGB may be, for example, GI +3.2 us; t is_HE-STFSymbol length of HE-STF, e.g., 4us in downlink PPDU; n is a radical of_HE-LTF(k) Indicating the symbol number of the HE-LTF in the kth time segment in the common of the kth HE-SIGB segment; t is_HE-LTF(k) The symbol length of HE-LTF in the k-th time segment may be GI +3.2us, GI +6.4us, or GI +12.8us, for example; n is a radical of_Data(k) The number of data symbols contained in the kth time segment; t is_data(k) For example, the length of the symbol in the kth time segment may be GI +12.8 us; n is a radical of_HE-LTF(0)＝0；N_Data(0)＝0。

When the time segment length field in the k-th HE-SIGB segment public field is used for indicating the time length of the time segment scheduled by the k-th HE-SIGB segment, the receiving end can calculate the starting time of the time segment scheduled by the k-th HE-SIGB segment according to the time length indicated by the time segment length field in the first to k-1 HE-SIGB segment public fields.

The specific calculation method is shown as the following formula:

wherein, T_RLSIGThe time length of the RLSIG field may be, for example, 4 us; t is_HE-SIGAThe time length of HE-SIGA domain may be, for example, 8us or 16 us; t is_HE-SIGBThe symbol length of HE-SIGB may be, for example, GI +3.2 us; t is_start(0)＝0。

In this embodiment, the sending end sends HE-SIGB in a segmented form, and each HE-SIGB segment is independently encoded, while the receiving end can receive and analyze HE-SIGB segments one by one to obtain the scheduling information matched with the receiving end. By adopting the mode, the receiving end can obtain the scheduling information matched with the receiving end by receiving and analyzing part of the HE-SIGB segments without receiving and analyzing the whole HE-SIGB, thereby greatly reducing the expense of the data transmission process.

Corresponding to the PPDU transmission method, the invention also provides a PPDU transmission device.

Fig. 14 is a schematic structural diagram of a PPDU transmission apparatus according to the present invention. The apparatus may be disposed on an AP for performing a PPDU transmission method as shown in fig. 2.

As shown in fig. 14, the apparatus includes: preamble transmission section 1401, first signaling field transmission section 1402, second signaling field transmission section 1403, and transmission section 1404.

Wherein, the preamble sending unit 1401 is configured to send the first preamble part.

A first signaling domain sending unit 1402, configured to send a high efficiency signaling domain a HE-SIGA after sending the first preamble, where the HE-SIGA is used to indicate a symbol number of a high efficiency signaling domain B HE-SIGB and a coding modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB.

A second signaling domain transmitting unit 1403, configured to transmit the HE-SIGB after transmitting the HE-SIGA, where the HE-SIGB is formed by N HE-SIGB segments, each HE-SIGB segment is independently encoded, and each HE-SIGB segment includes a public domain, where N is greater than or equal to 1; and the N HE-SIGB segments are respectively and sequentially used for scheduling the N time segments.

A transmission unit 1404, configured to transmit the 1 st to N time segments in sequence according to scheduling of the N HE-SIGB segments, respectively, after the HE-SIGB is sent, where each time segment includes a high-efficiency short training field HE-STF, a high-efficiency long training field HE-LTF, and a load field.

The formats and respective contents of the first preamble, the HE-SIGA, the HE-SIGB, and the time segment may be referred to in the foregoing embodiments, and are not described herein again.

In this embodiment, the PPDU transmission apparatus transmits the HE-SIGB in a segmented form, and each HE-SIGB segment is independently encoded, so that the receiving end can receive and analyze the HE-SIGB segments one by one to acquire scheduling information matched with the receiving end. By adopting the mode, the receiving end can obtain the scheduling information matched with the receiving end by receiving and analyzing part of the HE-SIGB segments without receiving and analyzing the whole HE-SIGB, thereby greatly reducing the expense of the data transmission process.

Fig. 15 is a schematic structural diagram of a PPDU transmission apparatus according to the present invention. The apparatus may be disposed on an STA for performing a PPDU transmission method as described in fig. 13.

As illustrated in fig. 15, the apparatus may include: a preamble receiving unit 1501, a first signaling field receiving unit 1502, a second signaling field receiving unit 1503, and a transmission unit 1504.

A preamble receiving unit 1501 is configured to receive the first preamble part.

A first signaling domain receiving unit 1502, configured to receive and parse a high efficiency signaling domain a HE-SIGA when it is determined that the PPDU is of the specified type according to the first preamble part.

And a second signaling domain receiving unit 1503, configured to receive and parse the HE-SIGB segment included in the high efficiency signaling domain B HE-SIGB according to the coding modulation scheme MCS indicated by the HE-SIGA and the symbol number of the HE-SIGB.

A transmission unit 1504, configured to determine and transmit a time segment carrying the receiver data according to the scheduling information in the HE-SIGB segment matched with the receiving end after receiving the HE-SIGB segment containing the scheduling information matched with the receiving end, where the time segment carrying the receiver data is one of N time segments contained in a PPDU, and N is greater than or equal to 1.

Optionally, the second signaling domain receiving unit 1503 includes: a second signaling domain receiving subunit, configured to receive, after receiving the HE-SIGA, a first HE-SIGB segment, where a symbol number of the first HE-SIGB segment is obtained by subtracting a symbol number indicated by a HE-SIGB symbol number domain of the HE-SIGA from a symbol number indicated by a symbol number domain in a public domain in the first HE-SIGB segment, or is obtained from the symbol number domain in the public domain of the first HE-SIGB segment; the analysis subunit is used for analyzing the first HE-SIGB segment according to the coding modulation scheme MCS indicated by the HE-SIGA after receiving the first HE-SIGB segment; a judging subunit, configured to judge whether the first HE-SIGB segment includes scheduling information matched with a receiving end according to an analysis result obtained by analyzing the first HE-SIGB segment; the transmitting unit 1504 is specifically configured to transmit the time segment scheduled by the scheduling information when the first HE-SIGB segment includes the scheduling information matched with the receiving end.

Optionally, the second signaling domain receiving subunit is further configured to receive a k +1 th HE-SIGB segment when the k th HE-SIGB segment does not include scheduling information matched with the receiving end, where a symbol number of the k +1 th segment is indicated by a symbol number field in a k +1 th HE-SIGB segment common domain, or is obtained by subtracting a symbol number indicated by a symbol number field in the k +1 th HE-SIGB segment common domain from a symbol number indicated by a symbol number field in the k +1 th HE-SIGB segment common domain, or is obtained by a symbol number field of a k-th or k + 1-th transmission configuration domain of the first HE-SIGB segment; the parsing subunit is further configured to parse the (k + 1) th HE-SIGB segment according to an MCS field in the kth HE-SIGB segment public domain or an MCS field indicated by the MCS field of the kth transmission configuration field of the first HE-SIGB segment; the judging subunit is further configured to judge whether the (k + 1) th HE-SIGB segment includes scheduling information matched with a receiving end according to an analysis result obtained by analyzing the (k + 1) th HE-SIGB segment; the transmitting unit 1504 is further configured to receive a time segment scheduled by the scheduling information when the (k + 1) th HE-SIGB segment contains the scheduling information matched with the receiving end.

Optionally, the transmission unit 1504 includes: a determining subunit, configured to determine, according to the time length or the number of symbols indicated by the time segment length field in the 1 st to k-th HE-SIGB segment public domains and the time length or the number of symbols indicated by the time segment length field in the k +1 th HE-SIGB segment, a starting time of a time segment scheduled by the k +1 th HE-SIGB segment; a transmitting subunit, configured to transmit, from the start time, the time segment scheduled by the (k + 1) th HE-SIGB segment within the time length or the number of symbols indicated by the time segment length field.

Optionally, the apparatus further comprises: and the control unit is used for stopping receiving the (k + 1) th to the Nth HE-SIGB segments when the public domain of the kth HE-SIGB segment is analyzed to be wrong.

Optionally, the apparatus further comprises: and the processing unit is used for discarding the PPDU when the HE-SIGB does not contain the HE-SIGB segment matched with the receiving end.

Optionally, the processing unit is specifically configured to discard the PPDU when it is determined that the nth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB segment according to an indication of the nth-1 or nth HE-SIGB segment, and the nth HE-SIGB segment does not include scheduling information matched with a receiving end.

Fig. 16 is a schematic diagram of a transmission system according to an embodiment of the present invention. The system may be a Basic Service Set (BSS).

As shown in fig. 16, the BSS includes at least one AP and at least two STAs, wherein the STAs are non-AP stations (non-AP STAs). All non-AP stations will communicate with the AP in the BSS and further communicate with the external network or other stations (belonging to the BSS or other BSSs) through the AP. Generally, communication from the AP to the STA is called Downlink (DL) and communication from the STA to the AP is called Uplink (UL).

According to the interface specification of AP and STA communication defined by IEEE802.11 series standards, an AP is mainly divided into two layers, a Media Access Control Layer (MAC for short) and a physical Layer (PHY for short). The PHY layer of the AP encapsulates the PSDU processed by the MAC layer of the station according to a PHY transmission format defined by the standard, i.e., PPDU, and sends the encapsulated PSDU to the STA through an antenna. Similarly, the STA may be divided into two layers, namely a medium access control layer and a physical layer. Besides receiving the downlink PPDU sent by the AP, the STA may also send an uplink PPDU to the AP according to the scheduling of the AP.

The AP may include components such as a processor, a memory, and a communication module, and each of the components may be connected by one or more buses. The AP may be in a bus structure, a star structure, or a combination of more or less components, or different component arrangements, which is not limited in the present invention.

The processor is a control center of the AP, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and/or processes data by operating or executing software programs and/or modules stored in the memory and calling data stored in the memory. The processor may be composed of an Integrated Circuit (IC), for example, a single packaged IC, or a plurality of packaged ICs connected with the same or different functions. For example, the Processor may include only a Central Processing Unit (CPU), or may be a combination of a GPU, a Digital Signal Processor (DSP), and a control chip (e.g., a baseband chip) in the communication Unit. In the embodiment of the present invention, the CPU may be a single operation core, or may include multiple operation cores.

The communication module is used for establishing a communication channel so that the AP can transmit data through the communication channel. The communication channel may include a Wireless Local Area Network (Wireless LAN) module, a bluetooth module, a baseband (Base Band) module, and other communication modules, and a Radio Frequency (RF) circuit corresponding to the communication module, and is used for performing Wireless Local Area Network communication, bluetooth communication, infrared communication, and/or cellular communication system communication.

The memory may be used to store software programs and modules, and the processor executes various functional applications of the AP and implements data processing by operating the software programs and modules stored in the memory. The memory mainly comprises a program storage area and a data storage area, wherein the program storage area can store an operating system, application programs required by at least one function, such as a program for realizing the PPDU transmission method shown in FIG. 2, and the like; the data storage area may store data (such as audio data, a phonebook, etc.) created according to the use of the terminal, etc. In an embodiment of the present invention, the Memory may include a volatile Memory, such as a Nonvolatile dynamic Random Access Memory (NVRAM), a Phase Change Random Access Memory (PRAM), a Magnetoresistive Random Access Memory (MRAM), and a non-volatile Memory, such as at least one magnetic disk Memory device, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a flash Memory device, such as a NOR flash Memory (NOR flash Memory) or a NAND flash Memory (NAND flash Memory). The non-volatile memory stores an operating system and an application program executed by the processor. The processor loads operating programs and data from the non-volatile memory into memory and stores digital content in a mass storage device. The operating system includes various components and/or drivers for controlling and managing conventional system tasks, such as memory management, storage device control, power management, etc., as well as facilitating communication between various hardware and software components. In the embodiment of the present invention, the operating system may be an Android system developed by Google, an iOS system developed by Apple, a Windows operating system developed by Microsoft, or an embedded operating system such as Vxworks.

In the embodiment of the invention, the processor of the AP can be used for generating the first preamble part, the HE-SIGA, the HE-SIGB and the time segment of the downlink PPDU, or can be used for analyzing the first preamble part, the HE-SIGA, the HE-SIGB and the time segment of the uplink PPDU.

The communication module of the AP may be configured to transmit a downlink PPDU and an uplink PPDU, and specifically: the communication module may transmit a first preamble portion; after the first preamble part is sent, sending a high-efficiency signaling domain A HE-SIGA, wherein the HE-SIGA is used for indicating the symbol number of a high-efficiency signaling domain B HE-SIGB and the coding modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB; after the HE-SIGA is sent, the HE-SIGB is sent, wherein the HE-SIGB consists of N HE-SIGB segments, each HE-SIGB segment is independently coded and comprises a public domain, and N is more than or equal to 1; the N HE-SIGB segments are respectively and sequentially used for scheduling N time segments; and after the HE-SIGB is sent, sequentially transmitting the 1 st to the N time segments according to the scheduling of the N HE-SIGB segments, wherein each time segment comprises a high-efficiency short training field HE-STF, a high-efficiency long training field HE-LTF and a load field.

Similar to the composition of the AP, the STA may also include components such as a processor, memory, and a communication module. The various components may also be connected by one or more buses, which is not a limitation of the invention.

The communication module of the STA may transmit the downlink PPDU and the uplink PPDU. In particular, the communication module may be configured to receive a first preamble portion; when the PPDU is judged to be of the appointed type according to the first preamble part, receiving and analyzing a high-efficiency signaling domain A HE-SIGA; receiving and analyzing HE-SIGB segments contained in a high-efficiency signaling domain B HE-SIGB according to a coding modulation scheme MCS indicated by the HE-SIGA and the symbol number of the HE-SIGB; after receiving the HE-SIGB segment containing scheduling information matched with the receiving end, determining and transmitting the time segment bearing the receiving end data according to the scheduling information in the HE-SIGB segment matched with the receiving end, wherein the time segment bearing the receiving end data is one of N time segments contained in a PPDU, and N is more than or equal to 1.

The processor of the STA may be configured to analyze the first preamble, HE-SIGA, HE-SIGB, and time segment of the downlink PPDU received by the communication module of the STA, or may be configured to generate the uplink PPDU.

In addition to the above-mentioned contents, in order to complete the transmission and processing of the downlink PPDU and the uplink PPDU, the processor and the communication module of the AP and the processor and the communication module of the STA may also be used to execute other methods or steps, and specific methods or steps may be referred to in the foregoing embodiments and will not be described herein again.

Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for system and apparatus embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for relevant points.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for PPDU transmission of a physical layer convergence protocol data unit (PPDU), the method comprising:

transmitting a first preamble part;

after the first preamble part is sent, sending a high-efficiency signaling domain A HE-SIGA, wherein the HE-SIGA is used for indicating the symbol number of a high-efficiency signaling domain B HE-SIGB and the coding modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB;

after the HE-SIGA is sent, the HE-SIGB is sent, wherein the HE-SIGB consists of N HE-SIGB segments, each HE-SIGB segment is independently coded and comprises a public domain, and N is more than or equal to 1; the N HE-SIGB segments are respectively and sequentially used for scheduling the N time segments;

and after the HE-SIGB is sent, sequentially transmitting the 1 st to the N time segments according to the scheduling of the N HE-SIGB segments, wherein each time segment comprises a high-efficiency short training field HE-STF, a high-efficiency long training field HE-LTF and a load field.

2. The method of claim 1,

the HE-SIGA includes a first indication field and an MCS field, wherein,

the first indication field is used for indicating whether more than one time segment is transmitted after the HE-SIGB transmission is completed;

the MCS field is used for indicating the MCS adopted by the first HE-SIGB segment;

the public domain of each HE-SIGB segment at least comprises one of an MCS domain or a symbol number domain;

wherein, the symbol number field in the kth HE-SIGB segment is used for indicating the symbol number of the kth HE-SIGB segment or indicating the total symbol number from the kth +1 HE-SIGB segment to the Nth HE-SIGB segment,

and the MCS field in the kth HE-SIGB segment is used for indicating the MCS of the kth +1 HE-SIGB segment, the MCS of the kth HE-SIGB segment is not higher than the MCS of the kth +1 HE-SIGB segment, and k is more than or equal to 1 and less than or equal to N-1.

3. The method of claim 1,

the HE-SIGA includes a second indication field and an MCS field, wherein,

the second indication field indicating whether the first HE-SIGB segment is the last HE-SIGB segment,

the MCS field to indicate the MCS to be employed by the first of the HE-SIGB segments,

the HE-SIGB segment comprises a public domain, and the public domain at least comprises one of an MCS domain, a symbol number domain or a third indication domain;

the symbol number field in the kth HE-SIGB segment is used for indicating the symbol number of the kth HE-SIGB segment or indicating the total symbol number from the kth +1 HE-SIGB segment to the Nth HE-SIGB segment;

the MCS field in the kth HE-SIGB segment is used for indicating the MCS of the kth +1 HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the MCS of the kth +1 HE-SIGB segment, wherein k is more than or equal to 1 and less than or equal to N-1;

and the third indication field in the kth HE-SIGB segment is used for indicating whether the kth +1 HE-SIGB segment is the last HE-SIGB segment.

4. The method of claim 1,

the HE-SIGA includes an MCS field; wherein the content of the first and second substances,

the MCS field to indicate the MCS of the first of the HE-SIGB segments,

the symbol number field in the kth HE-SIGB segment is used to indicate the number of symbols of the kth HE-SIGB segment, or to indicate the total number of symbols from the (k + 1) th HE-SIGB segment to the nth HE-SIGB segment,

the MCS field in the kth HE-SIGB segment is used for indicating the MCS of the kth +1 HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the MCS of the kth +1 HE-SIGB segment, wherein k is more than or equal to 1 and less than or equal to N-1,

a third indication field in the kth HE-SIGB segment is used to indicate whether the kth HE-SIGB segment is the last HE-SIGB segment.

5. The method of claim 1,

the HE-SIGA comprises a first indication domain and N HE-SIGB segmentation configuration domains; wherein the content of the first and second substances,

each HE-SIGB segmentation configuration field at least comprises one of an MCS field or a symbol number field; wherein the content of the first and second substances,

the MCS field of the kth HE-SIGB segment configuration field is used for indicating the MCS adopted by the kth HE-SIGB segment;

and the symbol number field of the kth HE-SIGB segment configuration field is used for indicating the symbol number of the kth HE-SIGB segment.

6. A method according to any one of claims 2 to 5, wherein the common domain of each of the HE-SIGB segments further comprises a time segment length domain; wherein the content of the first and second substances,

the time segment length field in the kth HE-SIGB segment is used for indicating the time length of the time segment scheduled by the kth HE-SIGB segment or indicating the data symbol number of the time segment scheduled by the kth HE-SIGB segment.

7. The method of claim 1,

the HE-SIGA comprises a fourth indication domain, an MCS domain and an HE-SIGB symbol number domain;

the fourth indication field is used for indicating the number of segments contained in the HE-SIGB, or indicating the number of time segments to be sent after the HE-SIGB is sent;

the MCS field is used for indicating MCS adopted by the first HE-SIGB segment;

the HE-SIGB symbol number field is used for indicating the total occupied symbol number of all HE-SIGB segments;

the first HE-SIGB segment includes a common domain; wherein the content of the first and second substances,

the public domain comprises N-1 transmission configuration domains, and each transmission configuration domain at least comprises one of an MCS domain or a symbol number domain;

the MCS field of the kth transmission configuration field is used for indicating the MCS adopted by the kth +1 HE-SIGB segment;

the symbol number field of the kth transmission configuration field is used to indicate the symbol number of the (k + 1) th HE-SIGB segment or the symbol number of the kth HE-SIGB segment.

8. The method of claim 7, wherein each of the transport configuration fields further comprises a time segment length field; wherein the content of the first and second substances,

the time segment length field of the kth transmission configuration field is used to indicate the time length of the time segment scheduled by the kth HE-SIGB segment.

9. The method of claim 1, 2, 3, 4, 5, 7 or 8, wherein when a downlink PPDU is transmitted in series with an uplink PPDU, the load comprises a downlink PPDU load and an uplink PPDU load;

wherein each HE-SIGB segment is used for scheduling a time segment contained in one downlink PPDU load or scheduling a time segment contained in one uplink PPDU load.

10. The method of claim 9,

each HE-SIGB segmented public domain also comprises an uplink and downlink indication domain and a resource allocation information RA domain; wherein the content of the first and second substances,

the uplink and downlink indication domain of the kth HE-SIGB segment is used for indicating that the time segment scheduled by the kth HE-SIGB segment belongs to a downlink PPDU load or an uplink PPDU load;

and the RA field of the kth HE-SIGB segment is used for indicating the resource allocation information of the resource units in the time segment scheduled by the kth HE-SIGB segment.

11. A method for PPDU transmission of a physical layer convergence protocol data unit (PPDU), the method comprising:

receiving a first preamble portion;

when the PPDU is judged to be of the appointed type according to the first preamble part, receiving and analyzing a high-efficiency signaling domain AHE-SIGA;

receiving and analyzing HE-SIGB segments contained in a high-efficiency signaling domain BHE-SIGB according to a coding modulation scheme MCS indicated by the HE-SIGA and the symbol number of the HE-SIGB;

after receiving the HE-SIGB subsection containing the scheduling information matched with the receiving end, transmitting the time subsection bearing the data of the receiving end according to the scheduling information in the HE-SIGB subsection matched with the receiving end; the time segment for bearing the receiving end data is one of N time segments contained in the PPDU, and N is more than or equal to 1.

12. The method of claim 11, wherein receiving and parsing the HE-SIGB segment included in the HE-SIGB according to the coded modulation scheme MCS indicated by the HE-SIGB and the number of symbols of the HE-SIGB comprises:

after receiving the HE-SIGA, receiving a first HE-SIGB segment, wherein the symbol number of the first HE-SIGB segment is obtained by subtracting the symbol number indicated by the HE-SIGB symbol number field of the HE-SIGA from the symbol number indicated by the symbol number field in the public domain in the first HE-SIGB segment, or is obtained from the symbol number field in the public domain of the first HE-SIGB segment;

after receiving the first HE-SIGB segment, analyzing the first HE-SIGB segment according to a coding modulation scheme MCS indicated by the HE-SIGA;

judging whether the first HE-SIGB segment contains scheduling information matched with a receiving end according to an analysis result obtained by analyzing the first HE-SIGB segment;

the time segment for transmitting and bearing the data of the receiving end according to the scheduling information in the HE-SIGB segment matched with the receiving end comprises the following steps:

and if the first HE-SIGB segment contains scheduling information matched with the receiving end, transmitting the time segment scheduled by the scheduling information.

13. The method of claim 11, further comprising:

if the kth HE-SIGB segment does not contain scheduling information matched with a receiving end, receiving the kth +1 HE-SIGB segment, wherein the symbol number of the kth segment is indicated by a symbol number field in a kth +1 HE-SIGB segment public domain, or the symbol number indicated by the symbol number field in the kth HE-SIGB segment public domain is subtracted from the symbol number indicated by the symbol number field in the kth HE-SIGB segment public domain, or the symbol number is obtained by the symbol number field of the kth or k +1 transmission configuration domain of the first HE-SIGB segment, wherein k +1 is less than or equal to N;

analyzing the k +1 th HE-SIGB segment according to the MCS domain in the k-th HE-SIGB segment public domain or the MCS domain indicated by the MCS domain of the k-th transmission configuration domain of the first HE-SIGB segment;

judging whether the (k + 1) th HE-SIGB segment contains scheduling information matched with a receiving end according to an analysis result obtained by analyzing the (k + 1) th HE-SIGB segment;

the time segmentation which is transmitted and matched with the receiving end according to the scheduling of the HE-SIGB segmentation matched with the receiving end comprises the following steps:

and if the (k + 1) th HE-SIGB segment contains scheduling information matched with a receiving end, transmitting the time segment scheduled by the scheduling information.

14. The method of claim 12 or 13, wherein transmitting the time segment scheduled by the scheduling information comprises:

determining the starting time of the time segment scheduled by the (k + 1) th HE-SIGB segment according to the time length or the symbol number indicated by the time segment length field in the 1 to k HE-SIGB segment public fields and the time length or the symbol number indicated by the time segment length field in the (k + 1) th HE-SIGB segment;

transmitting the time segment scheduled by the (k + 1) th HE-SIGB segment within the time length or the number of symbols indicated by the time segment length field from the starting time.

15. The method of claim 13, wherein the method further comprises:

and stopping receiving the (k + 1) th to Nth HE-SIGB segments if the public domain resolution of the k-th HE-SIGB segment is wrong.

16. The method of any of claims 11 to 13, further comprising:

and if the HE-SIGB does not contain the HE-SIGB segment matched with the receiving end, discarding the PPDU.

17. The method of claim 16, wherein discarding the PPDU if the high efficiency signaling domain B does not contain a HE-SIGB fragment that matches a receiving end comprises:

and if the Nth HE-SIGB segment is determined to be the last HE-SIGB segment of the HE-SIGB segments according to the indication of the Nth-1 or Nth HE-SIGB segment, and the Nth HE-SIGB segment does not contain scheduling information matched with a receiving end, discarding the PPDU.

18. An apparatus for physical layer convergence protocol data unit (PPDU) transmission, the apparatus comprising:

a preamble transmitting unit for transmitting a first preamble part;

a first signaling domain sending unit, configured to send a high efficiency signaling domain a HE-SIGA after sending the first preamble, where the HE-SIGA is used to indicate a symbol number of a high efficiency signaling domain B HE-SIGB and a coding modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB;

a second signaling domain transmitting unit, configured to transmit the HE-SIGB after transmitting the HE-SIGA; the HE-SIGB is composed of N HE-SIGB segments, each HE-SIGB segment is independently coded and comprises a public domain, and N is more than or equal to 1; the N HE-SIGB segments are respectively and sequentially used for scheduling the N time segments;

and a transmission unit, configured to transmit the 1 st to N time segments in sequence according to the scheduling of the N HE-SIGB segments, respectively, after the HE-SIGB is sent, where each time segment includes a high-efficiency short training field HE-STF, a high-efficiency long training field HE-LTF, and a load field.

19. The apparatus of claim 18,

the HE-SIGA includes a first indication field and an MCS field, wherein,

20. The apparatus of claim 18,

the HE-SIGA includes a second indication field and an MCS field, wherein,

the second indication field is used for indicating whether the first HE-SIGB segment is the last HE-SIGB segment or not;

the HE-SIGB segment comprises a public domain, and the public domain at least comprises one of an MCS domain, a symbol number domain or a third indication domain; wherein the content of the first and second substances,

21. The apparatus of claim 18,

the MCS field to indicate the MCS of the first of the HE-SIGB segments,

22. The apparatus of claim 18,

23. An apparatus according to any one of claims 19 to 22, wherein the common domain of each of the HE-SIGB segments further comprises a time segment length domain; wherein the content of the first and second substances,

24. The apparatus of claim 18,

the MCS field is used for indicating MCS adopted by the first HE-SIGB segment;

25. The apparatus of claim 24, wherein each of the transmission configuration fields further comprises a time segment length field; wherein the content of the first and second substances,

26. The apparatus of claim 18, 19, 20, 21, 22, 24 or 25, wherein when a downlink PPDU is transmitted in series with an uplink PPDU, the load comprises a downlink PPDU load and an uplink PPDU load;

27. The apparatus of claim 26,

28. An apparatus for physical layer convergence protocol data unit (PPDU) transmission, the apparatus comprising:

a preamble receiving unit for receiving a first preamble part;

a first signaling domain receiving unit, configured to receive and analyze a high efficiency signaling domain a HE-SIGA when the PPDU is determined to be of the specified type according to the first preamble part;

a second signaling domain receiving unit, configured to receive and parse an HE-SIGB segment included in the high-efficiency signaling domain B HE-SIGB according to a coding modulation scheme MCS indicated by the HE-SIGA and a symbol number of the HE-SIGB;

and the transmission unit is used for determining and transmitting the time segment for bearing the receiving end data according to the scheduling information in the HE-SIGB segment matched with the receiving end after receiving the HE-SIGB segment containing the scheduling information matched with the receiving end, wherein the time segment for bearing the receiving end data is one of N time segments contained in a PPDU, and N is more than or equal to 1.

29. The apparatus of claim 28, wherein the second signaling domain receiving unit comprises:

a second signaling domain receiving subunit, configured to receive, after receiving the HE-SIGA, a first HE-SIGB segment, where a symbol number of the first HE-SIGB segment is obtained by subtracting a symbol number indicated by a HE-SIGB symbol number domain of the HE-SIGA from a symbol number indicated by a symbol number domain in a public domain in the first HE-SIGB segment, or is obtained from the symbol number domain in the public domain of the first HE-SIGB segment;

the analysis subunit is used for analyzing the first HE-SIGB segment according to the coding modulation scheme MCS indicated by the HE-SIGA after receiving the first HE-SIGB segment;

a judging subunit, configured to judge whether the first HE-SIGB segment includes scheduling information matched with a receiving end according to an analysis result obtained by analyzing the first HE-SIGB segment;

the transmission unit is specifically configured to transmit the time segment scheduled by the scheduling information when the first HE-SIGB segment includes the scheduling information matched with the receiving end.

30. The apparatus of claim 29,

the second signaling domain receiving subunit is further configured to receive a k +1 th HE-SIGB segment when the k th HE-SIGB segment does not include scheduling information matched with a receiving end, where a symbol number of the k +1 th segment is indicated by a symbol number field in a k +1 th HE-SIGB segment public domain, or is obtained by subtracting a symbol number indicated by a symbol number field in the k +1 th HE-SIGB segment public domain from a symbol number indicated by a symbol number field in the k +1 th HE-SIGB segment public domain, or is obtained by a symbol number field of a k-th or k + 1-th transmission configuration domain of the first HE-SIGB segment;

the parsing subunit is further configured to parse the (k + 1) th HE-SIGB segment according to an MCS field in the kth HE-SIGB segment public domain or an MCS field indicated by the MCS field of the kth transmission configuration field of the first HE-SIGB segment;

the judging subunit is further configured to judge whether the (k + 1) th HE-SIGB segment includes scheduling information matched with a receiving end according to an analysis result obtained by analyzing the (k + 1) th HE-SIGB segment;

and the transmission unit is also used for transmitting the time segment scheduled by the scheduling information when the (k + 1) th HE-SIGB segment contains the scheduling information matched with the receiving end.

31. The apparatus of claim 29 or 30, wherein the transmission unit comprises:

a determining subunit, configured to determine, according to the time length or the number of symbols indicated by the time segment length field in the 1 st to k-th HE-SIGB segment public domains and the time length or the number of symbols indicated by the time segment length field in the k +1 th HE-SIGB segment, a starting time of a time segment scheduled by the k +1 th HE-SIGB segment;

a transmitting subunit, configured to transmit, from the start time, the time segment scheduled by the (k + 1) th HE-SIGB segment within the time length or the number of symbols indicated by the time segment length field.

32. The apparatus of claim 30, wherein the apparatus further comprises:

and the control unit is used for stopping receiving the (k + 1) th to the Nth HE-SIGB segments when the public domain of the kth HE-SIGB segment is analyzed to be wrong.

33. The apparatus of claim 30 or 32, wherein the apparatus further comprises:

and the processing unit is used for discarding the PPDU when the HE-SIGB does not contain the HE-SIGB segment matched with the receiving end.

34. The apparatus of claim 33,

the processing unit is specifically configured to discard the PPDU when the nth HE-SIGB segment is determined to be the last HE-SIGB segment of the HE-SIGB segment according to an indication of the nth-1 or nth HE-SIGB segment, and the nth HE-SIGB segment does not include scheduling information matched with a receiving end.

35. A wireless access point, comprising a communication module,

the communication module is used for transmitting a first preamble part; after the first preamble part is sent, sending a high-efficiency signaling domain A HE-SIGA, wherein the HE-SIGA is used for indicating the symbol number of a high-efficiency signaling domain B HE-SIGB and the coding modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB; after the HE-SIGA is sent, the HE-SIGB is sent, wherein the HE-SIGB consists of N HE-SIGB segments, each HE-SIGB segment is independently coded and comprises a public domain, and N is more than or equal to 1; the N HE-SIGB segments are respectively and sequentially used for scheduling the N time segments; and after the HE-SIGB is sent, sequentially transmitting the 1 st to the N time segments according to the scheduling of the N HE-SIGB segments, wherein each time segment comprises a high-efficiency short training field HE-STF, a high-efficiency long training field HE-LTF and a load field.

36. A station, comprising a communication module,

the communication module is configured to receive a first preamble portion; when the PPDU is judged to be of the appointed type according to the first preamble part, receiving and analyzing a high-efficiency signaling domain A HE-SIGA; receiving and analyzing HE-SIGB segments contained in a high-efficiency signaling domain B HE-SIGB according to a coding modulation scheme MCS indicated by the HE-SIGA and the symbol number of the HE-SIGB; after receiving the HE-SIGB segment containing the scheduling information matched with the receiving end, determining and transmitting the time segment bearing the receiving end data according to the scheduling information in the HE-SIGB segment matched with the receiving end, wherein the time segment bearing the receiving end data is one of N time segments contained in a PPDU, and N is more than or equal to 1.