WO2017076020A1

WO2017076020A1 - Ppdu transmission method and apparatus, wireless access point, and station

Info

Publication number: WO2017076020A1
Application number: PCT/CN2016/087921
Authority: WO
Inventors: 张佳胤; 朱俊; 罗俊; 刘乐
Original assignee: 华为技术有限公司
Priority date: 2015-11-06
Filing date: 2016-06-30
Publication date: 2017-05-11
Also published as: CN106685578A; CN106685578B

Abstract

The present invention provides a PPDU transmission method and apparatus, a wireless access point, and a station. The method comprises: sending a first preamble part; after the first preamble part is sent, sending an HE-SIGA; after the HE-SIGA is sent, sending an HE-SIGB, the HE-SIGB consisting of N HE-SIGB subsegments, each HE-SIGB subsegment being independently coded, and the HE-SIGB subsegments being sequentially used for scheduling N time subsegments; and after the HE-SIGB is sent, sequentially transmitting a first to an N^th time subsegment according to the scheduling of the N HE-SIGB subsegments. By using the transmission method provided in an embodiment of the present invention, a reception end may receive and parse part of HE-SIGB subsegments only and does not need to receive and parse all of the HE-SIGB subsegments, thereby greatly reducing overheads of a data transmission process.

Description

PPDU transmission method, device, wireless access point and site

This application claims priority to Chinese Patent Application No. 201510749671.2, entitled "PPDU Transmission Method, Apparatus, Wireless Access Point and Site" on November 6, 2015, the entire contents of which are hereby incorporated by reference. Combined in this application.

Technical field

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

Background technique

The IEEE 802.11 series of standards is a standard currently used for wireless local area network (WLAN) communication on Unlicensed Bands. Most versions of the IEEE 802.11 family of standards employ Orthogonal Frequency Division Multiplex (OFDM) technology. With OFDM technology, the transmitting end can modulate a plurality of modulation symbol constellations transmitted to the receiving end to a plurality of mutually orthogonal subcarriers for parallel transmission to improve data transmission efficiency.

In order to make the data transmission mode more flexible, the IEEE 802.11ax standard specifies that Orthogonal Frequency Division Multiplex Addressing (OFDMA) technology can be used for data transmission between the transmitting end and the receiving end, that is, the transmitting end can The modulation constellation symbols of the multiple receiving ends are multiplexed and transmitted in parallel on different orthogonal subcarriers. When the data transmission is performed by the OFDMA technology, the physical layer (Physical Layer, PHY for short) of the transmitting end may be a physical layer convergence protocol (Physical Layer Convergence Procedure) generated by the media access control layer (MAC) of the transmitting end. The PLCP Service Data Unit (PSDU) is encapsulated into a PLCP Protocol Data Unit (PPDU) in accordance with the PHY transmission format defined by the IEEE 802.11ax standard, and transmitted to the receiving end through an antenna.

When using OFDMA technology for data transmission, the PPDU usually includes a legacy preamble (L-Pre), a repeated traditional signaling domain (Related LSIG, RLSIG for short), and a high efficiency signaling field A (High Efficiency Signal field A, Highly Efficient Signaling Field B (HE-SIGB) and High Efficiency Short Training Field (HE-STF), High Efficiency Long Training Field (High) Efficiency Long Training Field, referred to as HE-LTF) and load (Payload) and other components. The HE-SIGA carries the configuration information common to the entire PPDU, for example, the 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 can be based on the HE- The content carried by the SIGA further parses the subsequent content of the PPDU. The HE-SIGB mainly carries the bandwidth resources used by the respective PSDUs of the target receiving end, and the transmission method used by each PSDU, such as the MCS, the number of space-time streams, etc., and the receiving end can determine whether the PPDU carries the PPDU according to the HE-SIGB. The receiving end needs to receive the PSDU; if the receiving end finds that the PPDU carries the PSDU that the receiving end needs to receive by analyzing the HE-SIGB, the automatic Gain Control (AGC) can be further performed by the HE-STF, and The channel estimation is performed by HE-LTF, and then the PSDU carried in the load is accepted.

Since the HE-SIGB needs to carry the bandwidth resources used by the respective PSDUs of the target receiving end, and the transmission method used by each PSDU, it can be seen that the HE-SIGB containing information is related to the number of receiving ends that the PPDU needs to support. When the number of users supported by the PPDU increases, the amount of data contained in the HE-SIGB increases. The increased amount of data contained in the HE-SIGB will result in a corresponding increase in the time required to transmit and parse the HE-SIGB, resulting in a large overhead in the data transmission process.

Summary of the invention

The embodiments of the present invention provide a PPDU transmission method, a device, a wireless access point, and a station, so as to solve the problem that the data transmission process is expensive when the PPDU supports a large number of users in the prior art.

In a first aspect, an embodiment of the present invention provides a PPDU transmission method, including: transmitting a first preamble portion; after transmitting the first preamble portion, transmitting a high efficiency signaling domain A HE-SIGA, where The HE-SIGA is used to indicate the number of symbols of the high-efficiency signaling domain B HE-SIGB and the coded modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB; after transmitting the HE-SIGA, the HE- SIGB, wherein the HE-SIGB is composed of N HE-SIGB segments, each of the HE-SIGB segments is independently coded, and each of the HE-SIGB segments includes a common domain, where N≥ 1; the N HE-SIGB segments are sequentially used to schedule N time segments respectively; after transmitting the HE-SIGB, respectively, according to the scheduling of the N HE-SIGB segments, respectively The first to N time segments are described, and each of the time segments includes an efficient short training domain HE-STF, an efficient long training domain HE-LTF, and a load domain.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the HE-SIGA includes a first indication domain and an MCS domain, where the first indication domain is used to indicate that after the HE-SIGB transmission is completed. Whether more than one time segment will be sent; the MCS field is used to indicate the MCS adopted by the first one of the HE-SIGB segments; and the public domain of each of the HE-SIGB segments includes at least the MCS Domain or symbol number field a symbol number field in the kth HE-SIGB segment is used to indicate the number of symbols of the kth HE-SIGB segment, or is used to indicate the k+1th HE-SIGB segment to the Nth The total number of symbols in the HE-SIGB segment; the MCS field in the kth HE-SIGB segment is used to indicate the MCS of the k+1th HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not MCS higher than the k+1th HE-SIGB segment, 1 ≤ k ≤ 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 domain and an MCS domain, where the second indication domain is used to indicate the first HE-SIGB Whether the segment is the last HE-SIGB segment; the MCS field is used to indicate the MCS adopted by the first one of the HE-SIGB segments; the HE-SIGB segment includes a public domain, the public domain Include at least one of an MCS field, a symbol number field, or a third indication field; wherein a symbol number field in the kth HE-SIGB segment is used to indicate the number of symbols of the kth HE-SIGB segment, or Indicates the total number of symbols of the k+1th HE-SIGB segment to the Nth HE-SIGB segment; the MCS field in the kth HE-SIGB segment is used to indicate the k+1th HE-SIGB segment MCS, and the MCS of the kth HE-SIGB segment is not higher than the MCS of the k+1th HE-SIGB segment, where 1≤k≤N-1; in the kth HE-SIGB segment The third indication field is used to indicate whether the k+1th 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 domain, where the MCS domain is used to indicate an MCS of the first one of the HE-SIGB segments; The HE-SIGB segment includes a public domain, and the public domain includes at least one of an MCS domain, a symbol number domain, or a third indicator domain; wherein a symbol number field in the kth HE-SIGB segment is used Indicates the number of symbols of the kth HE-SIGB segment, or indicates the total number of symbols for the k+1th HE-SIGB segment to the Nth HE-SIGB segment; the kth HE-SIGB segment The MCS field is used to indicate the MCS of the k+1th HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the MCS of the k+1th HE-SIGB segment, where 1≤ k ≤ N-1; the 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 domain and N HE-SIGBHE-SIGB segment configuration fields, where the first indication domain is used by Whether to indicate that more than one time segment is transmitted after the HE-SIGB transmission is completed; each of the HE-SIGB segment configuration fields includes at least one of an MCS domain or a symbol number field; wherein, the kth HE The MCS field of the -SIGB segment configuration field is used to indicate the MCS adopted by the kth HE-SIGB segment; the symbol number field of the kth HE-SIGB segment configuration field is used to indicate the kth HE-SIGB segment The number of symbols.

Combining any one of the first to fourth possible implementations of the first aspect, the fifth possibility in the first aspect In an implementation manner, the public domain of each of the HE-SIGB segments further includes a time segment length field; wherein a time segment length field in the kth HE-SIGB segment is used to indicate the kth HE - The length of time the time segment is scheduled for the SIGB segment, or the number of data symbols used to indicate 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 domain, an MCS domain, and an HE-SIGB symbol number domain; wherein the fourth indication domain is used to indicate The number of segments included in the HE-SIGB, or used to indicate the number of time segments to be transmitted after the HE-SIGB transmission is completed; the MCS field is used to indicate the first HE-SIGB segment The adopted MCS; the HE-SIGB symbol number field is used to indicate the total number of symbols occupied by all HE-SIGB segments; the first HE-SIGB segment includes a public domain; wherein the public domain includes N-1 Transmission configuration fields, each of which includes at least one of an MCS domain or a symbol number field; an MCS field of the kth transmission configuration field is used to indicate an MCS used for the k+1th HE-SIGB segment The symbol number field of the kth transmission configuration field is used to indicate the number of symbols of the k+1th HE-SIGB segment or the number of symbols of the kth HE-SIGB segment.

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

With reference to the first aspect, or any one of the first to the seventh possible implementation manners of the first aspect, in the eighth possible implementation manner of the first aspect, when the downlink PPDU is sent in series with the uplink PPDU, the load includes a PPDU payload and an uplink PPDU payload; wherein each of the HE-SIGB segments is configured to schedule a time segment included in one of the downlink PPDU payloads, or to be included in a load of the uplink PPDU Time segmentation is scheduled.

With reference to the eighth possible implementation manner of the first aspect, in the ninth possible implementation manner of the first aspect, the public domain of each of the HE-SIGB segments further includes an uplink and downlink indication domain and a resource allocation information RA domain. The uplink and downlink indication field of the kth HE-SIGB segment is used to indicate that the time segment scheduled by the kth HE-SIGB segment belongs to the downlink PPDU payload or belongs to the uplink PPDU payload; the kth HE-SIGB sub-portion The RA field of the segment is used to indicate resource allocation information of resource elements 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, the method comprising: receiving a first preamble portion; receiving and parsing a high efficiency signal when determining that the PPDU is a specified type according to the first preamble portion The field A HE-SIGA receives and parses the HE-SIGB segment included in the efficient signaling domain B HE-SIGB according to the number of symbols of the coded modulation schemes MCS and HE-SIGB indicated by the HE-SIGA; After the receiving end matches the HE-SIGB segment of the scheduling information, according to the HE-SIGB segment matching the receiving end The scheduling information transmits a time segment carrying data of the receiving end, wherein the time segment carrying the data of the receiving end is one of the N time segments included in the PPDU, where N≥1.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the HE-SIGB segment included in the HE-SIGB is received and parsed according to the number of symbols of the coded modulation schemes MCS and HE-SIGB indicated by the HE-SIGA The method includes: after receiving the HE-SIGA, receiving the first HE-SIGB segment, where the number of symbols of the first HE-SIGB segment is represented by the number of symbols indicated by the HE-SIGB symbol number field of the HE-SIGA The number of symbols indicated by the symbol number field in the public domain in the first HE-SIGB segment is subtracted, or obtained from the symbol field of the first HE-SIGB segment public domain; upon receiving the first HE After the -SIGB segmentation, the first HE-SIGB segment is parsed according to the code modulation scheme MCS indicated by the HE-SIGA; the first result is determined according to the parsing result obtained by parsing the first HE-SIGB segment Whether the HE-SIGB segment includes scheduling information matching the receiving end; the time segment of transmitting the data of the receiving end according to the scheduling information in the HE-SIGB segment matching the receiving end includes: if the first The HE-SIGB segment includes scheduling information that matches the receiving end, and the scheduling information is transmitted. Time segment degrees.

With reference to the second aspect, in a second possible implementation manner of the second aspect, if the kth HE-SIGB segment does not include scheduling information that matches the receiving end, the k+1th HE-SIGB segment is received, Wherein, the number of symbols of the k+1th segment is indicated by the symbol number field in the k+1th HE-SIGB segment common domain, or is indicated by the symbol number field in the kth HE-SIGB segment public domain The number of symbols is subtracted from the number of symbols indicated by the symbol number field in the k+1th HE-SIGB segment common domain, or by the kth or k+1th transmission configuration of the first HE-SIGB segment The symbol number field of the domain is obtained, where k+1 ≤ N; according to the MCS field of the kth HE-SIGB segment common domain MCS domain or the first HE-SIGB segment kth transmission configuration domain The MCS parses the k+1th HE-SIGB segment; and determines whether the k+1th HE-SIGB segment matches the receiving end according to the parsing result obtained by parsing the k+1th HE-SIGB segment The scheduling information of the HE-SIGB segment that matches the receiving end and the time segment matching the receiving end includes: if the k+1th HE-SIGB segment includes the matching end Scheduling information, then transmitting the time segment scheduled by the scheduling information.

With reference to the first or the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the time segment scheduled to transmit the scheduling information includes: according to the 1st to the kth HE-SIGB points The length of time or the number of symbols indicated by the time segment length field in the segment public domain, and the length of time or number of symbols indicated by the time segment length field in the k+1th HE-SIGB segment, determining the k+th The start time of the time segment scheduled by one HE-SIGB segment; from the start time, transmitting the k+1th time within the time length or number of symbols indicated by the time segment length field Time segmentation scheduled by the HE-SIGB segment.

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: stopping receiving the k+1 if the public domain of the kth HE-SIGB segment is parsed incorrectly To the Nth HE-SIGB segment.

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

With reference to the fifth possible implementation manner of the second aspect, in the sixth possible implementation manner of the second aspect, if the high-efficiency signaling domain B does not include the HE-SIGB segment that matches the receiving end, discarding the The PPDU includes: if the Nth HE-SIGB segment is determined to be the last HE-SIGB segment of the HE-SIGB segment according to the indication of the N-1th or Nth HE-SIGB segment, and the The N HE-SIGB segments do not contain scheduling information that matches the receiving end, and the PPDU is discarded.

In a third aspect, an embodiment of the present invention provides a PPDU transmission apparatus, where the apparatus includes: a preamble transmitting unit, configured to send a first preamble portion; and a first signaling domain sending unit, configured to send the first preamble portion Thereafter, a high efficiency signaling domain A HE-SIGA is transmitted, wherein the HE-SIGA is used to indicate the number of symbols of the efficient signaling domain B HE-SIGB and the coding modulation scheme of at least one HE-SIGB segment in the HE-SIGB a second signaling domain sending unit, configured to send the HE-SIGB after transmitting the HE-SIGA, wherein the HE-SIGB is composed of N HE-SIGB segments, each of the HEs - SIGB segment independent coding, and each of said HE-SIGB segments includes a common domain, where N ≥ 1; said N HE-SIGB segments are sequentially used for N time segments for scheduling; a unit, configured to sequentially transmit the first to N time segments according to a scheduling of the N HE-SIGB segments, respectively, after sending the HE-SIGB, where each time segment includes an efficient short Training domain HE-STF, efficient long training domain HE-LTF and load domain.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the HE-SIGA includes a first indication domain and an MCS domain, where the first indication domain is used to indicate that after the HE-SIGB transmission is completed. Whether more than one time segment will be sent; the MCS field is used to indicate the MCS adopted by the first one of the HE-SIGB segments; and the public domain of each of the HE-SIGB segments includes at least the MCS One of the domain or symbol number fields; wherein 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 k+1th HE- The total number of symbols from the 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+1th HE-SIGB segment, and the kth HE The MCS of the -SIGB segment is not higher than the MCS of the k+1th HE-SIGB segment, 1 ≤ k ≤ N-1.

With reference to the third aspect, in a second possible implementation manner of the third aspect, the HE-SIGA includes a second An indication field and an MCS field, wherein the second indication field is used to indicate whether the first HE-SIGB segment is the last HE-SIGB segment; the MCS field is used to indicate the first HE-SIGB The MCS adopted by the segment; the HE-SIGB segment includes a public domain, and the public domain includes at least one of an MCS domain, a symbol number domain, or a third indication domain; wherein, the kth HE-SIGB segment The symbol number field in the segment is used to indicate the number of symbols of the kth HE-SIGB segment, or to indicate the total number of symbols of the k+1th HE-SIGB segment to the Nth HE-SIGB segment; The MCS field in the k HE-SIGB segments is used to indicate the MCS of the k+1th HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the k+1th HE-SIGB segment The MCS of the segment, where 1 ≤ k ≤ N-1; the third indication field in the kth HE-SIGB segment is used to indicate whether the k+1th 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 domain, where the MCS domain is used to indicate an MCS of the first one of the HE-SIGB segments; The HE-SIGB segment includes a public domain, and the public domain includes at least one of an MCS domain, a symbol number domain, or a third indicator domain; wherein a symbol number field in the kth HE-SIGB segment is used Indicates the number of symbols of the kth HE-SIGB segment, or indicates the total number of symbols for the k+1th HE-SIGB segment to the Nth HE-SIGB segment; the kth HE-SIGB segment The MCS field is used to indicate the MCS of the k+1th HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the MCS of the k+1th HE-SIGB segment, where 1≤ k ≤ N-1; the 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 domain and N HE-SIGBHE-SIGB segment configuration fields, where the first indication domain is used Whether to indicate that more than one time segment is transmitted after the HE-SIGB transmission is completed; each of the HE-SIGB segment configuration fields includes at least one of an MCS domain or a symbol number field; wherein, the kth HE The MCS field of the -SIGB segment configuration field is used to indicate the MCS adopted by the kth HE-SIGB segment; the symbol number field of the kth HE-SIGB segment configuration field is used to indicate the kth HE-SIGB segment The number of symbols.

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

With reference to the third aspect, in a sixth possible implementation manner of the third aspect, the HE-SIGA includes a fourth indicator domain, an MCS domain, and a HE-SIGB symbol number field; wherein the fourth indicator domain is used to indicate The HE-SIGB The number of segments included in the segment, or used to indicate the number of time segments to be transmitted after the HE-SIGB transmission is completed; the MCS field is used to indicate the MCS used by the first HE-SIGB segment; The HE-SIGB symbol number field is used to indicate the total number of symbols occupied by all HE-SIGB segments; the first HE-SIGB segment includes a public domain; wherein the public domain includes N-1 transmission configuration fields, Each of the transport configuration fields includes at least one of an MCS domain or a symbol number field; an MCS field of the kth transport configuration field is used to indicate an MCS used by the k+1th HE-SIGB segment; the kth transmission The symbol number field of the configuration field is used to indicate the number of symbols of the k+1th HE-SIGB segment or the number of symbols of the kth HE-SIGB segment.

With reference to the sixth possible implementation manner of the third aspect, in the seventh possible implementation manner of the third aspect, each of the transmission configuration domains further includes a time segment length field; wherein, the time of the kth transmission configuration domain The segment length field is used to indicate the length of time 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 the eighth possible implementation manner of the third aspect, when the downlink PPDU is sent in series with the uplink PPDU, the load includes a PPDU payload and an uplink PPDU payload; wherein each of the HE-SIGB segments is configured to schedule a time segment included in one of the downlink PPDU payloads, or to be included in a load of the uplink PPDU Time segmentation is scheduled.

With reference to the eighth possible implementation manner of the third aspect, in the ninth possible implementation manner of the third aspect, the public domain of each of the HE-SIGB segments further includes an uplink and downlink indication domain and a resource allocation information RA domain. The uplink and downlink indication field of the kth HE-SIGB segment is used to indicate that the time segment scheduled by the kth HE-SIGB segment belongs to the downlink PPDU payload or belongs to the uplink PPDU payload; the kth HE-SIGB sub-portion The RA field of the segment is used to indicate resource allocation information of resource elements 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, where the apparatus includes: a preamble receiving unit, configured to receive a first preamble portion; and a first signaling domain receiving unit, configured to be according to the first preamble When it is determined that the PPDU is of a specified type, the high efficiency signaling domain A HE-SIGA is received and parsed; the second signaling domain receiving unit is configured to use the symbols of the coded modulation schemes MCS and HE-SIGB indicated by the HE-SIGA. The number receives and parses the HE-SIGB segment included in the high-efficiency signaling domain B HE-SIGB; and the transmission unit is configured to: after receiving the HE-SIGB segment including the scheduling information matching the receiving end, according to the receiving end The scheduling information in the matched HE-SIGB segment determines and transmits a time segment carrying the data of the receiving end, wherein the time segment carrying the data of the receiving end is one of the N time segments included in the PPDU, where, N ≥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 the first after receiving the HE-SIGA a HE-SIGB Segmentation, wherein the number of symbols of the first HE-SIGB segment is indicated by the number of symbols indicated by the HE-SIGB symbol number field of the HE-SIGA segment and the symbol number field of the public domain in the first HE-SIGB segment The number of symbols is subtracted or obtained from the symbol field of the first HE-SIGB segment public domain; the parsing subunit is used after receiving the first HE-SIGB segment according to HE-SIGA The indicated code modulation scheme MCS parses the first HE-SIGB segment; the determination subunit is configured to determine the first HE-SIGB score according to the parsing result obtained by parsing the first HE-SIGB segment Whether the segment includes scheduling information that matches the receiving end; the transmitting unit is specifically configured to: when the first HE-SIGB segment includes scheduling information that matches the receiving end, transmit the time segment scheduled by the scheduling information.

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 include, in the kth HE-SIGB segment, scheduling information that matches the receiving end. Receiving a k+1th HE-SIGB segment, wherein the number of symbols of the k+1th segment is indicated by a symbol number field in the k+1th HE-SIGB segment public domain, or by kth The number of symbols indicated by the symbol number field in the HE-SIGB segment common domain is subtracted from the number of symbols indicated by the symbol number field in the k+1th HE-SIGB segment common domain, or by the first HE - the symbol number field of the kth or k+1th transmission configuration field of the -SIGB segment is obtained; the parsing subunit is further used to segment the MCS field or the first HE- according to the kth HE-SIGB segmentation common domain The MCS indicated by the MCS field of the kth transmission configuration field of the SIGB segment parses the k+1th HE-SIGB segment; the determining subunit is further configured to divide the k+1th HE-SIGB according to the The parsing result obtained by parsing the segment determines whether the k+1th HE-SIGB segment contains scheduling information matching the receiving end; the transmitting unit is further configured to include and receive in the k+1th HE-SIGB segment end With the scheduling information when receiving the scheduling information of the scheduled time segment.

With reference to the first or the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the transmitting unit includes: determining a subunit, configured to use the first to k HE-SIGB segments The length of time or the number of symbols indicated by the time segment length field in the public domain, and the length of time or the number of symbols indicated by the time segment length field in the k+1th HE-SIGB segment, determining the k+1th The start time of the time segment scheduled by the HE-SIGB segment; the transmission subunit, configured to transmit the time length or the number of symbols indicated by the time segment length field from the start time Time segmentation scheduled by the k+1th HE-SIGB segment.

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: a control unit, configured to parse the error in the public domain of the kth HE-SIGB segment At the time, the reception of the k+1th to Nth HE-SIGB segments is stopped.

In combination with the fourth aspect or the first or second possible implementation of the fourth aspect, the fifth possible aspect in the fourth aspect In an implementation manner, the apparatus further includes: a processing unit, configured to discard the PPDU when the HE-SIGB does not include a HE-SIGB segment that matches 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 perform the indication according to the N-1th or Nth HE-SIGB segment Determining that the Nth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB segment, and the Nth HE-SIGB segment does not include scheduling information matching the receiving end, discarding the Describe the PPDU.

In a fifth aspect, the 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 portion; after transmitting the first preamble portion, Transmitting a high efficiency signaling domain A HE-SIGA, wherein the HE-SIGA is used to indicate the number of symbols of the efficient signaling domain B HE-SIGB and the coded modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB; After transmitting the HE-SIGA, the HE-SIGB is transmitted, wherein the HE-SIGB is composed of N HE-SIGB segments, each of the HE-SIGB segments are independently coded, and each of the described The HE-SIGB segment includes a public domain, where N≥1; the N HE-SIGB segments are sequentially used for N time segments for scheduling; after transmitting the HE-SIGB, respectively according to the The scheduling of the N HE-SIGB segments sequentially transmits the first to N time segments, each of the time segments including an efficient short training domain HE-STF, an efficient long training domain HE-LTF, and a load domain.

According to 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 portion; when determining, according to the first preamble portion, that the PPDU is of a specified type Receiving and parsing the high-efficiency signaling domain A HE-SIGA; receiving and parsing the HE-SIGB scores included in the efficient signaling domain B HE-SIGB according to the number of symbols of the coded modulation schemes MCS and HE-SIGB indicated by HE-SIGA After receiving the HE-SIGB segment including the scheduling information matching the receiving end, determining and transmitting the time segment carrying the data of the receiving end according to the scheduling information in the HE-SIGB segment matching the receiving end, where The time segment carrying the data of the receiving end is one of the N time segments included in the PPDU, where N≥1.

In the embodiment of the present invention, the first preamble portion is sent; after the first preamble portion is sent, the high efficiency signaling domain A HE-SIGA is sent; after the HE-SIGA transmission is completed, the HE-SIGB is sent. Wherein the HE-SIGB is composed of N HE-SIGB segments, each of which is independently coded; after the HE-SIGB transmission is completed, the first to N time segments are transmitted. With the transmission method provided by the embodiment of the present invention, the receiving end can receive and parse only part of the HE-SIGB segment without receiving and parsing all the contents 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 embodiments or the description of the prior art will be briefly described below, and it will be apparent to those skilled in the art that In other words, other drawings can be obtained based on these drawings without paying for creative labor.

1 is a schematic structural diagram of a PPDU of the present invention;

2 is a schematic flowchart of an embodiment of a PPDU transmission method according to the present invention;

3 is a schematic structural diagram of a HE-SIGA in a PPDU of the present invention;

4 is another schematic structural diagram of HE-SIGA in a PPDU according to the present invention;

5 is another schematic structural diagram of HE-SIGA in a PPDU according to the present invention;

6 is another schematic structural diagram of HE-SIGA in a PPDU according to the present invention;

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

8 is a schematic structural diagram of a HE-SIGB segment public domain in a PPDU according to the present invention;

9 is another schematic structural diagram of a HE-SIGB segment public domain in a PPDU according to the present invention;

10 is another schematic structural diagram of a HE-SIGB segment public domain in a PPDU according to the present invention;

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

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

13 is a schematic flowchart diagram of another embodiment of a PPDU transmission method according to the present invention;

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

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

Figure 16 is a schematic illustration of the delivery system of the present invention.

detailed description

In the embodiment of the present invention, the sending end may be an access point (AP); correspondingly, the receiving end may be a station (Station, referred to as STA).

In the embodiment of the present invention, the PPDU may include an uplink PPDU and a downlink PPDU. For convenience of description, the PPDU 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 portion and a load, and the preamble portion includes a first preamble portion, HE-SIGA and HE-SIGB, where the load may include N times. Time Segment; correspondingly, the HE-SIGB in the preamble portion may also be composed of N HE-SIGB segments. Each HE-SIGB segment corresponds to a time segment, which in turn is used to schedule N time segments, ie, the kth HE-SIGB segment is used for The kth time segment is scheduled, where k and N are positive integers, and k≥1, N≥1.

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

Step 201: Send a first preamble part of the PPDU.

The first preamble portion may include other parts of the PPDU preamble portion other than HE-SIGA and HE-SIGB. The content contained in the first preamble portion of the PPDU may be determined according to the IEEE 802.11 series of standards. For example, according to the IEEE 802.11ax standard, the preamble portion of the PPDU may include L-Pre, RLSIG, HE-SIGA, and HE-SIGB, and thus the first preamble portion of the PPDU may include L-Pre and RLSIG. Of course, the leading part of the PPDU may also include other possible structures.

When the first preamble portion includes the L-Pre and the RLSIG, the transmitting end first transmits the L-Pre, and after the L-Pre transmission is completed, transmits the RLSIG. The L-Pre is composed of a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), and a Legacy Signal Field (L-Pre). SIG) constitutes. The receiver can use L-STF for time-frequency synchronization and Automatic Gain Control (AGC), using L-LTF for frequency domain fine synchronization and channel estimation to demodulate all control before the HE-STF/HE-LTF domain. Information, and use the LENGTH field in the L-SIG to obtain the length of time the receiver needs to accept from the end of the L-SIG domain to the end of the entire PPDU. The contents and functions of L-Pre and RLSIG can be referred to the provisions of the prior art or the IEEE 802.11 series of standards, and will not be described herein.

Step 202: After transmitting the first preamble portion, send the HE-SIGA of the PPDU.

The transmitting end transmits the HE-SIGA after the transmission of the first preamble portion is completed. HE-SIGA is used to indicate the number of symbols of the MCS and the entire HE-SIGB of at least one HE-SIGB segment in the HE-SIGB. The HE-SIGA may be composed of a plurality of domains, and the domain included in the HE-SIGA and the content indicated by each domain are also different according to requirements.

The HE-SIGA may include an MCS field for indicating the first one of the HE-SIGBs The MCS used for segmentation. Optionally, as shown in FIG. 3, in addition to the MCS domain, the HE-SIGA may further include a first indication field, where the first indication field is used to indicate whether the HE-SIGB is sent after the transmission is completed. More than one time segmentation. Optionally, as shown in FIG. 4, in addition to the MCS domain, the HE-SIGA may also include a second indication field, where the second indication field is used to indicate the first HE-SIGB of the HE-SIGB. Whether the segment 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. The first indication field is used to indicate whether the HE-SIGB includes more than one HE-SIGB segment. Each of the HE-SIGB segment configuration fields may include at least one of an MCS domain or a symbol number field, wherein an MCS field of the kth HE-SIGB segment configuration domain is used to indicate a kth HE-SIGB segment The used MCS; the symbol number field of the kth HE-SIGB segment configuration field is used to indicate the number of symbols 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 a HE-SIGB symbol number field. The fourth indication field is used to indicate the number of HE-SIGB segments included in the HE-SIGB, or to indicate the number of time segments to be sent after the HE-SIGB transmission is completed. When the HE-SIGB only schedules resources in the downlink PPDU (without adopting a tandem 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 resources in a tandem structure, the number of HE-SIGB segments is equal to the sum of the number of time segments included in the scheduled uplink and downlink PPDUs. The MCS field is used to indicate the MCS adopted by the first HE-SIGB segment; the HE-SIGB symbol number field is used to indicate the HE-SIGB, that is, all HE-SIGB segments, the total number of symbols occupied.

Step 203: After transmitting the HE-SIGA, send the HE-SIGB of the PPDU.

The HE-SIGB may be composed of N HE-SIGB segments, wherein, as shown in FIG. 7, each HE-SIGB segment includes a Common Field (Common Field, referred to as Common) and at least one User-Specific Domain (User). Specific Field, referred to as User). Each user-specific domain in the HE-SIGB segmentation public domain corresponds to one receiver. The user-specific domain may include, in addition to the site identifier (STA ID) of the receiving end corresponding to the user-specific domain, information related to receiving or parsing the time segment scheduled by the HE-SIGB segment, for example, the number of space-time streams ( Number of Spatial Streams (NSTS); Transmit Beamforming (TxBF), Modulation and Coding Scheme (MCS), and Coding.

Wherein, the number of user-specific fields in the kth HE-SIGB segment can be compared with the kth HE-SIGB segment The number of PSDUs included in the scheduled time segment is the same. When the time segment scheduled by 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. Among them, the values of x and y can be set as needed, usually x≥1, y≥1.

The public domain of the kth HE-SIGB segment may include multiple domains, where the domains may be used to indicate the number of symbols of the HE-LTF in the time segment scheduled by the kth HE-SIGB segment (Number Of HE-LTF Symbol, HE-LTF Compression Mode or Guard Interval (GI).

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

As shown in FIG. 8, when the HE-SIGA includes one MCS domain and one first indication domain, each of the public domains may include at least one of an MCS domain, a symbol number domain, or a third indication domain. The symbol number field in the kth HE-SIGB segment public domain is used to indicate the number of symbols of the kth HE-SIGB segment, or is used to indicate the k+1th HE-SIGB segment to the Nth The total number of symbols in the HE-SIGB segment, 1 ≤ k ≤ N-1. The MCS field in the kth HE-SIGB segment common domain is used to indicate the MCS of the k+1th HE-SIGB segment. Optionally, the public domain of each of the HE-SIGB segments may further include a third indication domain, and the third indication domain in the kth HE-SIGB segment public domain is used to indicate the kth HE-SIGB. Whether the segment is the last HE-SIGB segment of the HE-SIGB.

When the HE-SIGA includes the MCS domain and the second indication domain, the public domain may include at least 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 to indicate the number of symbols of the kth HE-SIGB segment, or is used to indicate the k+1th HE-SIGB segment to the Nth HE- The total number of symbols in the SIGB segment. The MCS field in the kth HE-SIGB segment is used to indicate the MCS of the k+1th HE-SIGB segment. The third indication field in the kth HE-SIGB segment is used to indicate whether the k+1th HE-SIGB segment is the last HE-SIGB segment.

As shown in FIG. 9, when the HE-SIGA includes the first indication domain and the MCS domain, the public domain of each of the HE-SIGB segments may include at least one of an MCS domain or a symbol number domain. 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 is used to indicate the k+1th HE-SIGB segment to the Nth HE- The total number of symbols in the SIGB segment. The MCS field in the kth HE-SIGB segment is used to indicate the MCS of the k+1th HE-SIGB segment, where 1 ≤ k ≤ N-1.

It should be noted here that when the MCS of the k+1th HE-SIGB segment is segmented by the kth HE-SIGB When a certain domain of the public domain indicates, the premise that the receiving end correctly demodulates the k+1th HE-SIGB segment is that the public domain of the kth HE-SIGB segment can be correctly parsed. Therefore, the kth need to be guaranteed. The MCS of the HE-SIGB segment is not higher than the MCS of the k+1th HE-SIGB segment.

As shown in FIG. 10, when the HE-SIGA includes a fourth indication field, an MCS field, and a HE-SIGB symbol number field, the public domain of the first HE-SIGB segment may include N-1 transmission configuration fields. Each of the transport configuration fields may include at least one of an MCS domain or a symbol number field; an MCS field of the kth transport configuration field is used to indicate an MCS used by the k+1th HE-SIGB segment; the kth The symbol number field of the transmission configuration field is used to indicate the number of symbols of the k+1th HE-SIGB segment or the number of symbols of the kth HE-SIGB segment.

In addition to the foregoing, the public domain of each of the HE-SIGB segments may also include a time segment length field. 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 kth HE-SIGB. The number of data symbols for the time segmentation scheduled by the segment. It should be noted that when the HE-SIGA includes the fourth indication field, the MCS domain, 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 kth. The length of time segmented by the HE-SIGB segment.

Step 204: After transmitting the HE-SIGB, sequentially transmit the first to N time segments according to scheduling of the N HE-SIGB segments.

After each HE-SIGB segment included in the HE-SIGB is transmitted, the transmitting end may send each of the time segments one by one until each time segment is transmitted, thereby enabling reception. The terminal receives the time segment matching with itself 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.

In addition to independently transmitting the uplink PPDU and the downlink PPDU, the uplink and downlink cascading may be used to transmit the downlink PDDU and the uplink PPDU between the transmitting end and the receiving end, that is, the uplink PPDU is transmitted immediately after the downlink PPDU transmission is completed. For example, after the AP sends the downlink PPDU to the STA, the STA immediately starts sending the uplink PPDU to the AP.

Therefore, in another embodiment, when the transmitting end transmits the downlink PDDU and the uplink PPDU in a serial configuration, the uplink PPDU may include a preamble portion and an uplink time segment, and the transmitting end may uniformly use the HE-SIGA and the HE-SIGB of the downlink PPDU. The segmentation schedules each time segment of the downlink PDDU and each time segment of the uplink PPDU. When the transmitting end sends the downlink PPDU and the uplink PPDU by using the uplink and downlink serial structure, the scheduling relationship between the HE-SIGB and the time segment may be as shown in FIG. 12, where N scheduled in the N HE-SIGB segments. In the time segment, the first to m time segments are time segments of the downlink PPDU, and the first The m+1 to N time segments are time segments of the uplink PPDU.

When the transmitting end sends the PDDU by using the uplink and downlink serial structure, the public domain of the kth HE-SIGB segment further includes an uplink and downlink indication domain and a resource allocation information RA indication domain; wherein, in the kth HE-SIGB segment The uplink and downlink indication field is used to indicate that the time segment scheduled by the HE-SIGB belongs to a downlink PPDU or belongs to an uplink PPDU; the RA indication field in the kth HE-SIGB segment is used to indicate that the HE-SIGB is scheduled by the HE-SIGB Resource allocation information for resource units in time segments.

It should be noted that the time segment of the PPDU to be sent in the step 204 may include only the time segment of the downlink PPDU sent by the AP to the STA, and may also include the time segment of the uplink PPDU sent by the STA to the AP. Of course, the sender may also send other data, such as a preamble portion of the uplink PPDU, between the time segment in which the AP sends the downlink PPDU and the time segment in which the STA sends the uplink PPDU.

With this embodiment, the transmitting end sends the HE-SIGB in a segmented form, and each HE-SIGB segment is independently coded, and the receiving end can receive and parse the HE-SIGB segment one by one to obtain scheduling information matching the receiving end. . In this way, the receiving end receives and parses part of the HE-SIGB segment to obtain scheduling information matching the receiving end, without having to receive and parse all HE-SIGBs, thereby greatly reducing the overhead of the data transmission process.

Referring to Figure 13, a flow chart 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 embodiment may include the following steps:

Step 1301: Receive a first preamble portion.

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

Step 1302: Receive, and parse, the high efficiency signaling domain A HE-SIGA when determining that the PPDU is of a specified type according to the first preamble portion of the PPDU.

The specified type may be a PPDU type that meets the specified communication standard. For example, a PPDU type conforming to the IEEE 802.11ax standard. After receiving the RLSIG, the receiving end may determine, according to the correlation between the RLSIG and the L-SIG domain in the L-Pre, whether the PPDU is a PPDU conforming to the IEEE 802.11ax standard. If the PPDU does not conform to the IEEE 802.11ax standard, the PPDU may be processed in a receiving and parsing manner corresponding to the format of the PPDU. If the PPDU complies with the IEEE 802.11ax standard, the PPDU may be considered to be of a specified type, and the receiving end may further receive and parse the HE-SIGA according to the method shown in the present invention.

For the specific judgment process of determining whether the PPDU is a PPDU conforming to the IEEE 802.11ax standard, refer to the existing transmission process conforming to the IEEE 802.11ax standard PPDU, and details are not described herein again.

Step 1303, receiving and parsing the HE-SIGB segment included in the efficient signaling domain B HE-SIGB according to the number of symbols of the MCS and the HE-SIGB indicated by the HE-SIGA.

After the HE-SIGA reception is completed, the receiving end first receives the first HE-SIGB segment; after receiving the first HE-SIGB segment, according to the coded modulation scheme MCS indicated by the HE-SIGA to the first HE -SIGB segmentation for parsing. The receiving end may first parse the fixed length HE-SIGB public domain according to the MCS in the HE-SIGA, and then determine the number of symbols of the first HE-SIGB segment according to the content included in the first HE-SIGB public domain, thereby parsing out The other content in the first HE-SIGB segment, resulting in the parsing result of the first HE-SIGB segment. Determining, according to the parsing result obtained by parsing the first HE-SIGB segment, whether the first HE-SIGB segment includes scheduling information matching the receiving end; if the first HE-SIGB segment includes the scheduling receiving end Information, then the receiving end may no longer receive the HE-SIGB segment and instead wait for the time segment scheduled by the receiving of the scheduling information.

Wherein, when the symbol number field in the first HE-SIGB segment public domain is used to indicate the number of symbols of the first HE-SIGB segment, the receiving end can directly obtain the symbol number field in the HE-SIGB segment. The number of symbols of the first HE-SIGB segment; when the symbol number field in the first HE-SIGB segment common field is used to indicate the symbol of the second HE-SIGB segment to the Nth HE-SIGB segment In the case of a number, the receiving end may subtract the number of symbols indicated by the symbol number field in the first HE-SIGB segment by the number of symbols indicated by the HE-SIGA to obtain the number of symbols of the first HE-SIGB segment.

If the kth HE-SIGB segment does not contain information of the scheduling receiver, the receiving end receives the k+1th HE-SIGB segment, where 1≤k≤N-1.

Similarly, when the symbol number field in the kth HE-SIGB segment common domain is used to indicate the number of symbols of the kth HE-SIGB segment, the receiving end can directly segment the symbol in the public domain from the HE-SIGB segment. The number field obtains the number of symbols of the kth HE-SIGB segment; when the symbol number field of the kth HE-SIGB segment common field is used to indicate the k+1th HE-SIGB segment to the Nth HE- When the number of symbols of the SIGB segment is small, the receiving end may subtract the number of symbols indicated by the symbol number field in the kth HE-SIGB segment by the number of symbols indicated by the HE-SIGA to obtain the kth HE-SIGB sub-score. The number of symbols in the segment.

When there is an MCS domain in the public domain of the kth HE-SIGB, the public domain of the k+1th HE-SIGB segment may be parsed first by using the MCS indicated by the MCS field in the kth HE-SIGB; k+1 the number of symbols of the HE-SIGB segment, and complete the analysis of the k+1th HE-SIGB segment to obtain the k+1th Analytical results of the HE-SIGB segmentation.

Alternatively, when the first HE-SIGB segment includes N-1 transmission configuration domains, the MCS indicated by the MCS domain of the kth transmission configuration domain and the kth or k+1th transmission configuration domain may be used. The number of symbols completes the analysis of the k+1th HE-SIGB segment, and the analysis result of the k+1th HE-SIGB segment is obtained. Specifically, after receiving the first HE-SIGB segment, the receiving end may first demodulate the first HE by using the HE-SIGB segment number carried in the HE-SIGA (in the fourth indication domain) and the MCS. - The public domain of the SIGB, which obtains information of N-1 transport configuration fields. If the number of symbols carried in the symbol number field in the kth transmission configuration field is the number of symbols of the k+1th HE-SIGB segment, all N-1 transmission configurations are performed by using the HE-SIGB symbol number field in the HE-SIGA The sum of the number of symbols in the domain is subtracted to obtain the length of the first HE-SIGB segment, and the first HE-SIGB segment is demodulated according to the MCS in the HE-SIGA; and the k+1th HE-SIGB The segmentation can be demodulated by the number of MCSs and symbols carried in the kth transmission configuration field carried in the first HE-SIGB segment. If the number of symbols carried in the symbol number field in the kth transmission configuration field is the number of symbols of the kth HE-SIGB segment, the kth and the number of symbols in the kth transmission configuration field may be the kth HE- The SIGB segment is demodulated, and the length of the last HE-SIGB segment (the Nth HE-SIGB segment) can be reduced by subtracting the number of HE-SIGB symbols in the HE-SIGA from the first to N-1 HE- The total number of symbols of the SIGB segment is obtained, wherein the sum of the number of symbols indicated by each of the 1st to N-1th transmission configuration fields is the total number of symbols of the first to N-1 HE-SIGB segments.

If the receiving end parses the received HE-SIGB segment and finds that the kth HE-SIGB segment contains scheduling information that matches the receiving end, the receiving end may no longer receive the k+1th to Nthth. HE-SIGB segmentation.

Since the reception and parsing of the k+1th HE-SIGB segment depends on the content of the public domain of the kth HE-SIGB segment, if the receiving end is parsing the public domain of the kth HE-SIGB segment When an error occurs, it is usually impossible to correctly receive and parse the k+1th segment. therefore. If the public domain of the kth HE-SIGB segment is parsed incorrectly, the k+1th to Nthth HE-SIGB segment may be stopped.

If the receiving end determines, according to the information carried in the N-1th or Nth HE-SIGB segment, the Nth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB segment, and After the receiving and parsing of the Nth HE-SIGB segment is completed, it is found that the Nth HE-SIGB segment does not include the scheduling information that matches the receiving end, and the PPDU does not include the PSDU that needs to be received by the receiving end. The receiving end can then discard the PPDU.

When the third indication field is included in the HE-SIGB segment, the receiving end is based on the N-1th or Nth HE-SIGB An indication of the third indication field in the segmentation public domain determines whether the Nth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB segment.

When the third indicator field is not included in the HE-SIGB segment, the Nth HE-SIGB may be determined according to the content indicated by the symbol number field in the N-1th or Nth HE-SIGB segment public domain. Whether the segment is the last HE-SIGB segment of the HE-SIGB segment.

For example, when the symbol number field in the kth HE-SIGB segment is used to indicate the total number of symbols of the k+1th HE-SIGB segment to the Nth HE-SIGB segment, the receiving end may judge Whether the content indicated by the symbol number field in the k HE-SIGB segments is 0 determines whether the k+1th HE-SIGB segment is the last segment in the entire HE-SIGB. If the content indicated by the symbol number field in the kth HE-SIGB segment is 0, the k+1th HE-SIGB segment is the last segment in the entire HE-SIGB; if the kth HE-SIGB is divided The content indicated by the symbol number field in the segment is not 0, indicating that the k+1th HE-SIGB segment is not the last segment in the entire HE-SIGB.

For another example, when the symbol number field in the kth HE-SIGB segment is used to indicate the number of symbols of the kth HE-SIGB segment, the receiving end may indicate according to the HE-SIGB symbol number field in the HE-SIGA. Whether the total number of symbols of the HE-SIGB minus the number of symbols of the 1st to k-1th HE-SIGB segments is equal to the number of symbols of the kth HE-SIGB segment, to determine whether the kth HE-SIGB segment is The last HE-SIGB segment of HE-SIGB. If equal, the kth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB; if not, the kth HE-SIGB segment is not the last HE- of the HE-SIGB. SIGB segmentation.

When the transmitting end sends the PDDU by using the uplink and downlink serial structure, the receiving end may further determine that the time segment scheduled by the kth HE-SIGB segment belongs to the content indicated by the uplink and downlink indication field in the kth HE-SIGB segment. The downlink PPDU payload or belongs to the uplink PPDU payload.

Step 1304, after receiving the HE-SIGB segment including the scheduling information matching the receiving end, transmitting the time segment carrying the receiving end data according to the scheduling information in the HE-SIGB segment matching the receiving end.

After receiving the HE-SIGB segment including the scheduling information matching the receiving end, the receiving end may according to the time length or the number of symbols indicated by the time segment length field in the 1st to kth HE-SIGB segments, and the number Determining the length of time or the number of symbols indicated by the time segment length field in the k+1 HE-SIGB segments, determining the start time of the scheduled time segment of the k+1th HE-SIGB segment; Starting from the start time, performing time-segment transmission within the time length indicated by the time segment length field, or performing time-segment transmission within the number of symbols indicated by the time segment length field, thereby completing the k+ The transmission of time segments scheduled by one HE-SIGB segment. Wherein, when the time segment scheduled by the k+1th HE-SIGB segment is the time segment of the downlink PPDU, The receiving end receives the time segment sent by the sending end; when the time segment scheduled by the k+1 HE-SIGB segment is the time segment of the uplink PPDU, the receiving end sends the time segment to the transmitting end.

When the time segment length field in the kth HE-SIGB segment common domain is used to indicate the number of symbols of the time segment scheduled by the kth HE-SIGB segment, the receiving end may pass the first to k-1 The number of symbols indicated by the time segment length field in the HE-SIGB segment common domain, the number of symbols of the HE-LTF, the HE-LTF compression mode, and the Payload GI information to calculate the scheduled time of the kth HE-SIGB segment The start time of the segment. Wherein, the start time refers to a time when the segment of the time is started to be transmitted.

The start time of the k-th time segment starts from T _start (k) after the end of the L-SIG. The specific calculation method is as follows:

The T _RLSIG is the length of the RLSIG field, for example, 4us; the T _HE-SIGA is the length of the HE-SIGA field, for example, 8us or 16us; the T _HE-SIGB is the symbol length of the HE-SIGB, for example, GI+3.2us; T _HE-STF is the symbol length of HE-STF, for example, 4us in the downlink PPDU; N _HE-LTF (k) is the number of symbols of HE-LTF in the kth time segment, in the first Indicated in the common of the k HE-SIGB segments; T _HE-LTF (k) is the symbol length of the HE-LTF in the kth time segment, for example, GI+3.2us, GI+6.4us, or GI+12.8us ; N _Data (k) is the number of data symbols contained in the kth time segment; T _data (k) can be, for example, the length of the symbol in the kth time segment, which is GI+12.8us; N _HE-LTF (0) = 0; N _Data (0) = 0.

When the time segment length field in the kth HE-SIGB segment common domain is used to indicate the time length of the time segment scheduled by the kth HE-SIGB segment, the receiving end may pass the first to k-1 The length of time indicated by the time segment length field in the HE-SIGB segment common domain calculates the start time of the time segment scheduled by the kth HE-SIGB segment.

The specific calculation method is as follows:

The T _RLSIG is the length of the RLSIG field, for example, 4us; the T _HE-SIGA is the length of the HE-SIGA field, for example, 8us or 16us; the T _HE-SIGB is the symbol length of the HE-SIGB, for example, Is GI+3.2us; T _start (0)=0.

In this embodiment, the transmitting end sends the HE-SIGB in a segmented form, and each HE-SIGB segment is independently coded, and the receiving end can receive and parse the HE-SIGB segment one by one to obtain a scheduling matching the receiving end. information. In this way, the receiving end receives and parses part of the HE-SIGB segment to obtain scheduling information matching the receiving end, without having to receive and parse all HE-SIGBs, thereby greatly reducing the overhead of the data transmission process.

Corresponding to the PPDU transmission method of the present invention, the present invention also provides a PPDU transmission apparatus.

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

As shown in FIG. 14, the apparatus includes: a preamble transmitting unit 1401, a first signaling domain transmitting unit 1402, a second signaling domain transmitting unit 1403, and a transmitting unit 1404.

The preamble sending unit 1401 is configured to send the first preamble portion.

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

The second signaling domain sending unit 1403 is configured to send the HE-SIGB after transmitting the HE-SIGB, where the HE-SIGB is composed of N HE-SIGB segments, each of the HE- The SIGB segments are independently coded, and each of the HE-SIGB segments includes a common domain, where N ≥ 1; the N HE-SIGB segments are sequentially used for N time segments for scheduling, respectively.

The transmitting unit 1404 is configured to, after transmitting the HE-SIGB, sequentially transmit the first to N time segments according to the scheduling of the N HE-SIGB segments, where each time segment includes Efficient short training domain HE-STF, efficient long training domain HE-LTF and load domain.

The format of the first preamble, the HE-SIGA, the HE-SIGB, and the time segment and the contents of the time segment can be referred to the foregoing embodiment, and details 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 coded, so that the receiving end can receive and parse the HE-SIGB segment acquisition and receiving end one by one. Matching scheduling information. In this way, the receiving end receives and parses part of the HE-SIGB segment to obtain scheduling information matching the receiving end, without having to receive and parse all HE-SIGBs, thereby greatly reducing the overhead of the data transmission process.

Referring to FIG. 15, a schematic structural diagram of a PPDU transmission apparatus according to the present invention is shown. The apparatus may be disposed on the STA for performing the PPDU transmission method as described in FIG.

As shown in FIG. 15, the apparatus may include: a preamble receiving unit 1501, a first signaling domain receiving unit 1502, a second signaling domain receiving unit 1503, and a transmitting unit 1504.

The preamble receiving unit 1501 is configured to receive the first preamble portion.

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

The second signaling domain receiving unit 1503 is configured to receive and parse the HE-SIGB segment included in the efficient signaling domain B HE-SIGB according to the number of symbols of the coded modulation schemes MCS and HE-SIGB indicated by the HE-SIGA.

The transmitting unit 1504 is configured to determine, according to the scheduling information in the HE-SIGB segment that matches the receiving end, the time of receiving the data of the receiving end after receiving the HE-SIGB segment that matches the scheduling information with the receiving end. Segmentation, wherein the time segment carrying the data of the receiving end is one of the N time segments included in the PPDU, where N≥1.

Optionally, the second signaling domain receiving unit 1503 includes: a second signaling domain receiving subunit, configured to receive the first HE-SIGB segment after receiving the HE-SIGA, where the first The number of symbols of the HE-SIGB segment is obtained by subtracting the number of symbols indicated by the HE-SIGB symbol number field of the HE-SIGA segment from the number of symbols indicated by the symbol number field in the common field in the first HE-SIGB segment. Or obtained from the first HE-SIGB segment public domain symbol number field; the parsing sub-unit is configured to, after receiving the first HE-SIGB segment, according to the code modulation scheme MCS pair indicated by HE-SIGA An HE-SIGB segment is parsed; the determining subunit is configured to determine, according to the parsing result obtained by parsing the first HE-SIGB segment, whether the first HE-SIGB segment includes a match with the receiving end. The scheduling unit 1504 is configured to: when the first HE-SIGB segment includes scheduling information that matches the receiving end, transmit the time segment scheduled by the scheduling information.

Optionally, the second signaling domain receiving subunit is further configured to receive the k+1th HE-SIGB segment when the kth HE-SIGB segment does not include scheduling information that matches the receiving end, Wherein, the number of symbols of the k+1th segment is indicated by the symbol number field in the k+1th HE-SIGB segment common domain, or is indicated by the symbol number field in the kth HE-SIGB segment public domain Number of symbols and symbol number field in the k+1th HE-SIGB segment public domain The number of indicated symbols is subtracted or obtained by the symbol number field of the kth or k+1th transmission configuration field of the first HE-SIGB segment; the parsing subunit is further used according to the kth HE - MCS parsing the kth field indicated by the MCS field of the MCS field of the kth transport domain or the MCS field of the kth transport configuration field of the first HE-SIGB segment; the judging subunit, And determining, by the parsing result obtained by parsing the k+1th HE-SIGB segment, whether the k+1th HE-SIGB segment includes scheduling information that matches the receiving end; the transmitting unit 1504 further And receiving, when the k+1th HE-SIGB segment includes scheduling information that matches the receiving end, receiving the time segment scheduled by the scheduling information.

Optionally, the transmitting unit 1504 includes: a determining subunit, configured according to a time length or a symbol number indicated by a time segment length field in the public domain of the 1st to kth HE-SIGB segments, and a k+th The length of time or the number of symbols indicated by the time segment length field in one HE-SIGB segment determines the start time of the time segment scheduled by the k+1th HE-SIGB segment; the transmission subunit is used for Transmitting, from the start time, a time segment scheduled by the k+1th HE-SIGB segment within a time length or number of symbols indicated by the time segment length field.

Optionally, the apparatus further includes: a control unit, configured to stop receiving the k+1th to Nth HE-SIGB segments when the public domain parsing error of the kth HE-SIGB segment is incorrect.

Optionally, the apparatus further includes: a processing unit, configured to discard the PPDU when the HE-SIGB does not include a HE-SIGB segment that matches the receiving end.

Optionally, the processing unit is specifically configured to determine, according to the indication of the N-1th or Nth HE-SIGB segment, that the Nth HE-SIGB segment is the last HE of the HE-SIGB segment. - SIGB segmentation, and the Nth HE-SIGB segment discards the PPDU when it does not contain scheduling information that matches the receiving end.

Referring to FIG. 16, which 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, where the STAs are non-AP STAs. All non-AP sites will communicate with the APs in the BSS, and further communicate with the external network or other sites (belonging to the BSS or other BSS) through the AP. Generally, the communication from the AP to the STA is called Downlink (DL), and the communication from the STA to the AP is called Uplink (UL).

According to the interface specification of the communication between the AP and the STA specified by the IEEE 802.11 series of standards, the AP can be mainly divided into two layers: a medium access control layer (MAC) and a physical layer (physical layer, PHY for short). The PHY layer of the AP is encapsulated by the PSDU processed by the MAC layer of the local station according to a standard defined PHY transmission format, that is, a PPDU, and transmitted to the STA through an antenna. Similarly, STAs can also be divided into two layers: the medium access control layer and the physical layer. In addition to 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 component may be connected through one or more buses. The AP may be a bus-shaped structure or a star-shaped structure, and may include more or less components, or combine some components, or different component arrangements, which are not limited by the present invention.

The processor is the control center of the AP, and connects various parts of the entire terminal by using various interfaces and lines, by running or executing software programs and/or modules stored in the memory, and calling data stored in the memory to execute the terminal. Various functions and / or processing data. The processor may be composed of an integrated circuit (IC), for example, may be composed of a single packaged IC, or may be composed of a plurality of packaged ICs that have the same function or different functions. For example, the processor may include only a central processing unit (CPU), or may be a GPU, a digital signal processor (DSP), and a control chip in the communication unit (for example, a baseband chip). )The combination. In the embodiment of the present invention, the CPU may be a single operation core, and may also include multiple operation cores.

The communication module is configured to establish a communication channel, and enable the AP to perform data transmission through the communication channel. The communication channel may include a wireless local area network (Wireless Local Area Network) module, a Bluetooth module, a baseband module, and the like, and a radio frequency (RF) circuit corresponding to the communication module. Used for wireless local area network communication, Bluetooth communication, infrared communication and/or cellular communication system communication.

The memory can be used to store software programs and modules, and the processor executes various functional applications of the AP and implements data processing by running software programs and modules stored in the memory. The memory mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function, such as a program for implementing the PPDU transmission method shown in FIG. 2, and the like; the data storage area can be stored according to Data created by the use of the terminal (such as audio data, phone book, etc.). In a specific embodiment of the present invention, the memory may include a volatile memory, such as a non-volatile volatile random access memory (NVRAM), a phase change random access memory (PRAM), A magnetoresistive random access memory (MRAM) may also include a non-volatile memory, such as at least one magnetic disk storage device or an electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory). Referred to as EEPROM), flash memory devices, such as NOR flash memory or NAND flash memory. The non-volatile memory stores the operating system and applications executed by the processor. The processor loads the running program and data from the non-volatile memory into memory and stores the digital content in a plurality of storage devices. 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, and the like, as well as facilitating communication between various hardware and software. In the embodiment of the present invention, the operating system may be an Android system of Google Inc., an iOS system developed by Apple Corporation, a Windows operating system developed by Microsoft Corporation, or an embedded operating system such as Vxworks.

In the embodiment of the present invention, the processor of the AP may be used to generate the first preamble portion of the downlink PPDU, the HE-SIGA, the HE-SIGB, and the time segment, or may also be used to the first preamble portion of the uplink PPDU, and the HE. -SIGA, HE-SIGB, and time segmentation for parsing.

The communication module of the AP may be configured to transmit the downlink PPDU and the uplink PPDU. Specifically, the communication module may send the first preamble portion; after transmitting the first preamble portion, send the high efficiency signaling domain A HE-SIGA Wherein the HE-SIGA is used to indicate the number of symbols of the efficient signaling domain B HE-SIGB and the coded modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB; after transmitting the HE-SIGA, transmitting The HE-SIGB, wherein the HE-SIGB is composed of N HE-SIGB segments, each of the HE-SIGB segments is independently coded, and each of the HE-SIGB segments includes a public domain, Wherein, N≥1; the N HE-SIGB segments are respectively used for N time segments for scheduling; after transmitting the HE-SIGB, respectively, according to scheduling of the N HE-SIGB segments, The first to N time segments are sequentially transmitted, and each of the time segments includes an efficient short training domain HE-STF, an efficient long training domain HE-LTF, and a load domain.

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

The STA communication module can transmit the downlink PPDU and the uplink PPDU. Specifically, the communication module may be configured to receive a first preamble portion; when determining, according to the first preamble portion, that the PPDU is of a specified type, receiving and parsing a high efficiency signaling domain A HE-SIGA; - the number of symbols of the coded modulation scheme MCS and HE-SIGB indicated by SIGA receives and parses the HE-SIGB segment included in the efficient signaling domain B HE-SIGB; receives the HE-SIGB containing the scheduling information matching the receiving end After segmentation, determining, according to the scheduling information in the HE-SIGB segment that matches the receiving end, time segmentation of the data carrying the receiving end, where The time segment carrying the data of the receiving end is one of the N time segments included in the PPDU, where N≥1.

The processor of the STA may be used to parse the first preamble portion, the HE-SIGA, the HE-SIGB, the time segment, and the like of the received downlink PPDU of the communication module of the STA, or may also be used to generate an 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 perform other methods or steps, specific methods or steps. The foregoing embodiment can be referred to, and details are not described herein again.

It will be apparent to those skilled in the art that the techniques in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM. , a disk, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system and the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

The embodiments of the invention described above are not intended to limit the scope of the invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

A physical layer convergence protocol data unit PPDU transmission method, the method comprising:

Sending the first leading portion;

After transmitting the first preamble portion, transmitting a high efficiency signaling domain A HE-SIGA, wherein the HE-SIGA is used to indicate the number of symbols of the efficient signaling domain B HE-SIGB and at least one HE in the HE-SIGB - SIGB segmentation coding scheme MCS;

After transmitting the HE-SIGA, the HE-SIGB is transmitted, wherein the HE-SIGB is composed of N HE-SIGB segments, each of the HE-SIGB segments are independently coded, and each of the described The HE-SIGB segment includes a public domain, where N ≥ 1; the N HE-SIGB segments are sequentially used to schedule N time segments, respectively;

After transmitting the HE-SIGB, the first to N time segments are sequentially transmitted according to the scheduling of the N HE-SIGB segments, and each of the time segments includes an efficient short training domain HE- STF, efficient long training domain HE-LTF and load domain.
The method of claim 1 wherein

The HE-SIGA includes a first indication domain and an MCS domain, where

The first indication field is used to indicate whether more than one time segment is sent after the HE-SIGB transmission is completed;

The MCS field is used to indicate an MCS used by the first one of the HE-SIGB segments;

The public domain of each of the HE-SIGB segments includes at least one of an MCS domain or a symbol number domain;

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 is used to indicate the k+1th HE-SIGB segment to the Nth HE- The total number of symbols in the SIGB segment,

The MCS field in the kth HE-SIGB segment is used to indicate the MCS of the k+1th HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the k+1th HE-SIGB Segmented MCS, 1 ≤ k ≤ N-1.
The method of claim 1 wherein

The HE-SIGA includes a second indication domain and an MCS domain, where

The second indication field is used to indicate whether the first HE-SIGB segment is the last HE-SIGB segment.

The MCS field is used to indicate the MCS used by the first HE-SIGB segment.

The HE-SIGB segment includes a public domain, and the public domain includes at least 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 to indicate the number of symbols of the kth HE-SIGB segment, or to indicate the k+1th HE-SIGB segment to the Nth HE-SIGB segment The total number of symbols in the segment;

The MCS field in the kth HE-SIGB segment is used to indicate the MCS of the k+1th HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the k+1th HE-SIGB Segmented MCS, where 1 ≤ k ≤ N-1;

The third indication field in the kth HE-SIGB segment is used to indicate whether the k+1th HE-SIGB segment is the last HE-SIGB segment.
A method as claimed in claim 1, wherein

The HE-SIGA includes an MCS domain; wherein

The MCS field is used to indicate the MCS of the first HE-SIGB segment,

The HE-SIGB segment includes a public domain, and the public domain includes at least 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 to indicate the number of symbols of the kth HE-SIGB segment, or to indicate the k+1th HE-SIGB segment to the Nth HE-SIGB segment The total number of symbols in the segment,

The MCS field in the kth HE-SIGB segment is used to indicate the MCS of the k+1th HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the k+1th HE-SIGB Segmented MCS, where 1 ≤ k ≤ N-1,

The 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.
The method of claim 1 wherein

The HE-SIGA includes a first indication field and N HE-SIGBHE-SIGB segment configuration fields;

The first indication field is used to indicate whether more than one time segment is sent after the HE-SIGB transmission is completed;

Each of the HE-SIGB segment configuration fields includes at least one of an MCS domain or a symbol number field;

The MCS field of the kth HE-SIGB segment configuration field is used to indicate the MCS used by the kth HE-SIGB segment;

The symbol number field of the kth HE-SIGB segment configuration field is used to indicate the number of symbols of the kth HE-SIGB segment.
The method according to any one of claims 2 to 5, wherein the public domain of each of the HE-SIGB segments further comprises a time segment length field;

The time segment length field in the kth HE-SIGB segment is used to indicate the time length of the time segment scheduled by the kth HE-SIGB segment, or is used to indicate the scheduled time of the Kth HE-SIGB segment. The number of data symbols for the segmentation.
The method of claim 1 wherein

The HE-SIGA includes a fourth indication domain, an MCS domain, and a HE-SIGB symbol number domain;

The fourth indication field is used to indicate the number of segments included in the HE-SIGB, or to indicate the number of time segments to be sent after the HE-SIGB transmission is completed;

The MCS field is used to indicate an MCS adopted by the first HE-SIGB segment;

The HE-SIGB symbol number field is used to indicate the total number of symbols occupied by all HE-SIGB segments;

The first HE-SIGB segment includes a public domain;

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

The MCS field of the kth transmission configuration field is used to indicate the MCS used by the k+1th HE-SIGB segment;

The symbol number field of the kth transmission configuration field is used to indicate the number of symbols of the k+1th HE-SIGB segment or the number of symbols of the kth HE-SIGB segment.
The method of claim 7 wherein each of said transport configuration fields further comprises a time segment length field;

The time segment length field of the kth transmission configuration field is used to indicate the length of time of the time segment scheduled by the kth HE-SIGB segment.
The method according to any one of claims 1 to 8, wherein when the downlink PPDU is transmitted in series with the uplink PPDU, the load includes an uplink and downlink PPDU payload and an uplink PPDU payload;

Each of the HE-SIGB segments is configured to schedule a time segment included in one downlink PPDU payload, or to schedule a time segment included in one uplink PPDU payload.
The method of claim 9 wherein:

The public domain of each of the HE-SIGB segments further includes an uplink and downlink indication domain and a resource allocation information RA domain;

The uplink and downlink indication field of the kth HE-SIGB segment is used to indicate that the time segment scheduled by the kth HE-SIGB segment belongs to a downlink PPDU payload or belongs to an uplink PPDU payload;

The RA field of the kth HE-SIGB segment is used to indicate resource allocation information of resource elements in the time segment scheduled by the kth HE-SIGB segment.
A physical layer convergence protocol data unit PPDU transmission method, the method comprising:

Receiving a first leading portion;

Receiving and parsing the high efficiency signaling domain A HE-SIGA when determining that the PPDU is of a specified type according to the first preamble portion;

Receiving and parsing the HE-SIGB segment included in the efficient signaling domain B HE-SIGB according to the number of symbols of the coded modulation schemes MCS and HE-SIGB indicated by the HE-SIGA;

After receiving the HE-SIGB segment that matches the scheduling information with the receiving end, the time segment of the data carrying the receiving end is transmitted according to the scheduling information in the HE-SIGB segment that matches the receiving end; The time segment is one of the N time segments included in the PPDU, N ≥ 1.
The method according to claim 11, wherein receiving and parsing the HE-SIGB segments included in the HE-SIGB according to the number of symbols of the coded modulation schemes MCS and HE-SIGB indicated by the HE-SIGA comprises:

After receiving the HE-SIGA, receiving the first HE-SIGB segment, wherein the number of symbols of the first HE-SIGB segment is the number of symbols indicated by the HE-SIGB symbol number field of the HE-SIGA and the first Subtracting the number of symbols indicated by the symbol number field in the public domain in the HE-SIGB segment or from the symbol number field in the first HE-SIGB segment public domain;

After receiving the first HE-SIGB segment, the first HE-SIGB segment is parsed according to the coded modulation scheme MCS indicated by the HE-SIGA;

Determining, according to an analysis result obtained by parsing the first HE-SIGB segment, whether the first HE-SIGB segment includes scheduling information that matches the receiving end;

The time segment for transmitting the data of the bearer receiving end according to the scheduling information in the HE-SIGB segment that matches the receiving end includes:

If the first HE-SIGB segment contains scheduling information that matches the receiving end, the time segment scheduled by the scheduling information is transmitted.
The method of claim 11 further comprising:

If the kth HE-SIGB segment does not include scheduling information that matches the receiving end, the k+1th HE-SIGB segment is received, where the number of symbols of the k+1th segment is by the k+1th The symbol number field indication in the HE-SIGB segment public domain, or the number of symbols indicated by the symbol number field in the kth HE-SIGB segment common domain and the k+1th HE-SIGB segment public domain The number of symbols indicated by the symbol number field is subtracted, or obtained by the symbol number field of the kth or k+1th transmission configuration field of the first HE-SIGB segment, where k+1≤N;

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

Determining, according to the parsing result obtained by parsing the k+1th HE-SIGB segment, whether the k+1th HE-SIGB segment includes scheduling information that matches the receiving end;

The time segmentation of the scheduled transmission of the HE-SIGB segment matching the receiving end and the receiving end includes:

If the k+1th HE-SIGB segment contains scheduling information that matches the receiving end, the time segment scheduled by the scheduling information is transmitted.
The method according to claim 12 or 13, wherein the time segment scheduled to transmit the scheduling information comprises:

The length of time or the number of symbols indicated by the time segment length field in the 1st to kth HE-SIGB segment common fields, and the time segment length field in the k+1th HE-SIGB segment The length of time or the number of symbols, determining the start time of the time segment scheduled by the k+1th HE-SIGB segment;

Transmitting, from the start time, a time segment scheduled by the k+1th HE-SIGB segment within a time length or number of symbols indicated by the time segment length field.
The method of claim 13 wherein the method further comprises:

If the public domain of the kth HE-SIGB segment is parsed incorrectly, the reception of the k+1th to Nth HE-SIGB segments is stopped.
The method according to any one of claims 11 to 13, wherein the method further comprises:

If the HE-SIGB does not contain a HE-SIGB segment that matches the receiving end, the PPDU is discarded.
The method according to claim 16, wherein if the high-efficiency signaling domain B does not include a HE-SIGB segment that matches the receiving end, discarding the PPDU includes:

If the Nth HE-SIGB segment is determined to be the last HE-SIGB segment of the HE-SIGB segment according to the indication of the N-1th or Nth HE-SIGB segment, and the Nth HE The -SIGB segment does not contain scheduling information that matches the receiving end, and the PPDU is discarded.
A physical layer convergence protocol protocol data unit PPDU transmission device, characterized in that the device comprises:

a preamble sending unit, configured to send the first preamble portion;

a first signaling domain sending unit, configured to send a high efficiency signaling domain A HE-SIGA after transmitting the first preamble portion, where the HE-SIGA is used to indicate an efficient signaling domain B HE-SIGB a number of symbols and a coded 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 transmitting the HE-SIGA; the HE-SIGB is composed of N HE-SIGB segments, each of the HE-SIGB segments Independently coding, and each of the HE-SIGB segments includes a common domain, N≥1; the N HE-SIGB segments are sequentially used for N time segments for scheduling;

a transmitting unit, configured to sequentially transmit the first to N time segments according to a scheduling of the N HE-SIGB segments respectively after transmitting the HE-SIGB, where each time segment includes high efficiency Short training domain HE-STF, efficient long training domain HE-LTF and load domain.
The device of claim 18, wherein

The HE-SIGA includes a first indication domain and an MCS domain, where

The first indication field is used to indicate whether more than one time segment is sent after the HE-SIGB transmission is completed;

The MCS field is used to indicate an MCS used by the first one of the HE-SIGB segments;

The public domain of each of the HE-SIGB segments includes at least one of an MCS domain or a symbol number domain;

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 is used to indicate the k+1th HE-SIGB segment to the Nth HE- The total number of symbols in the SIGB segment;

The MCS field in the kth HE-SIGB segment is used to indicate the MCS of the k+1th HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the k+1th HE-SIGB Segmented MCS, 1 ≤ k ≤ N-1.
The device of claim 18, wherein

The HE-SIGA includes a second indication domain and an MCS domain, where

The second indication field is used to indicate whether the first HE-SIGB segment is the last HE-SIGB segment;

The MCS field is used to indicate an MCS used by the first one of the HE-SIGB segments;

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

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 k+1th HE-SIGB segment to the Nth HE-SIGB segment The total number of symbols in the segment;

The MCS field in the kth HE-SIGB segment is used to indicate the MCS of the k+1th HE-SIGB segment, and the MCS of the kth HE-SIGB segment is not higher than the k+1th HE-SIGB Segmented MCS, where 1 ≤ k ≤ N-1;

The third indication field in the kth HE-SIGB segment is used to indicate whether the k+1th HE-SIGB segment is the last HE-SIGB segment.
The device of claim 18, wherein

The HE-SIGA includes an MCS domain; wherein

The MCS field is used to indicate the MCS of the first HE-SIGB segment,

The HE-SIGB segment includes a public domain, and the public domain includes at least 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 to indicate the number of symbols of the kth HE-SIGB segment, or to indicate the k+1th HE-SIGB segment to the Nth HE-SIGB segment The total number of symbols in the segment,

The MCS field in the kth HE-SIGB segment is used to indicate the MCS of the k+1th HE-SIGB segment, And the MCS of the kth HE-SIGB segment is not higher than the MCS of the k+1th HE-SIGB segment, where 1≤k≤N-1,

The 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.
The device of claim 18, wherein

The HE-SIGA includes a first indication field and N HE-SIGBHE-SIGB segment configuration fields; wherein the first indication field is used to indicate whether more than one time is sent after the HE-SIGB transmission is completed. Segmentation

Each of the HE-SIGB segment configuration fields includes at least one of an MCS domain or a symbol number field;

The MCS field of the kth HE-SIGB segment configuration field is used to indicate the MCS used by the kth HE-SIGB segment;

The symbol number field of the kth HE-SIGB segment configuration field is used to indicate the number of symbols of the kth HE-SIGB segment.
The apparatus according to any one of claims 19 to 22, wherein the public domain of each of the HE-SIGB segments further includes a time segment length field;

The time segment length field in the kth HE-SIGB segment is used to indicate the time length of the time segment scheduled by the kth HE-SIGB segment, or is used to indicate the scheduled time of the Kth HE-SIGB segment. The number of data symbols for the segmentation.
The device of claim 18, wherein

The HE-SIGA includes a fourth indication domain, an MCS domain, and a HE-SIGB symbol number domain;

The fourth indication field is used to indicate the number of segments included in the HE-SIGB, or to indicate the number of time segments to be sent after the HE-SIGB transmission is completed;

The MCS field is used to indicate an MCS adopted by the first HE-SIGB segment;

The HE-SIGB symbol number field is used to indicate the total number of symbols occupied by all HE-SIGB segments;

The first HE-SIGB segment includes a public domain;

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

The MCS field of the kth transmission configuration field is used to indicate the adoption of the k+1th HE-SIGB segment. MCS;

The symbol number field of the kth transmission configuration field is used to indicate the number of symbols of the k+1th HE-SIGB segment or the number of symbols of the kth HE-SIGB segment.
The apparatus according to claim 24, wherein each of said transmission configuration fields further comprises a time segment length field; wherein

The time segment length field of the kth transmission configuration field is used to indicate the length of time of the time segment scheduled by the kth HE-SIGB segment.
The device according to any one of claims 18 to 25, wherein when the downlink PPDU is sent in series with the uplink PPDU, the load includes an uplink and downlink PPDU payload and an uplink PPDU payload;

Each of the HE-SIGB segments is configured to schedule a time segment included in one downlink PPDU payload, or to schedule a time segment included in one uplink PPDU payload.
The device of claim 26, wherein

The public domain of each of the HE-SIGB segments further includes an uplink and downlink indication domain and a resource allocation information RA domain;

The uplink and downlink indication field of the kth HE-SIGB segment is used to indicate that the time segment scheduled by the kth HE-SIGB segment belongs to a downlink PPDU payload or belongs to an uplink PPDU payload;

The RA field of the kth HE-SIGB segment is used to indicate resource allocation information of resource elements in the time segment scheduled by the kth HE-SIGB segment.
A physical layer convergence protocol protocol data unit PPDU transmission device, characterized in that the device comprises:

a preamble receiving unit, configured to receive the first preamble portion;

a first signaling domain receiving unit, configured to receive and parse a high efficiency signaling domain A HE-SIGA when determining that the PPDU is of a specified type according to the first preamble portion;

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

a transmitting unit, configured to determine, according to the scheduling information in the HE-SIGB segment that matches the receiving end, the number of bearer receiving ends after receiving the HE-SIGB segment that includes the scheduling information matching the receiving end Time segmentation according to which the time segment carrying the data of the receiving end is one of the N time segments included in the PPDU, where N≥1.
The apparatus according to claim 28, wherein the second signaling domain receiving unit comprises:

a second signaling domain receiving subunit, configured to receive a first HE-SIGB segment after receiving the HE-SIGA, wherein the number of symbols of the first HE-SIGB segment is HE-SIGB of HE-SIGA The number of symbols indicated by the symbol number field is subtracted from the number of symbols indicated by the symbol number field in the common field in the first HE-SIGB segment, or the symbol number field from the first HE-SIGB segment public domain obtain;

a parsing subunit, configured to parse the first HE-SIGB segment according to the coded modulation scheme MCS indicated by the HE-SIGA after receiving the first HE-SIGB segment;

a determining subunit, configured to determine, according to the parsing result obtained by parsing the first HE-SIGB segment, whether the first HE-SIGB segment includes scheduling information that matches the receiving end;

The transmitting unit is specifically configured to: when the first HE-SIGB segment includes scheduling information that matches the receiving end, transmit the time segment scheduled by the scheduling information.
The device of claim 29, wherein

The second signaling domain receiving subunit is further configured to receive the k+1th HE-SIGB segment when the kth HE-SIGB segment does not include scheduling information that matches the receiving end, where the kth The number of symbols of +1 segment is indicated by the symbol number field in the k+1th HE-SIGB segment common domain, or the number of symbols indicated by the symbol number field in the kth HE-SIGB segment common domain The number of symbols indicated by the symbol number field in the k+1th HE-SIGB segment common domain is subtracted, or the number of symbols of the kth or k+1th transmission configuration field of the first HE-SIGB segment Domain acquisition;

The parsing subunit is further configured to parse the k+1 according to the MCS indicated by the MCS domain in the kth HE-SIGB segment public domain or the MCS domain of the kth transport configuration domain of the first HE-SIGB segment HE-SIGB segments;

The determining subunit is further configured to determine, according to the parsing result obtained by parsing the k+1th HE-SIGB segment, whether the k+1th HE-SIGB segment includes scheduling information that matches the receiving end;

The transmitting unit is further configured to receive a time segment scheduled by the scheduling information when the k+1th HE-SIGB segment includes scheduling information that matches the receiving end.
The device according to claim 29 or 30, wherein the transmission unit comprises:

Determining a subunit for a length of time or a number of symbols indicated by a time segment length field in the 1st to kth HE-SIGB segment common fields, and a time division in the k+1th HE-SIGB segment The length of time or the number of symbols indicated by the segment length field determines the start time of the time segment scheduled by the k+1th HE-SIGB segment;

a transmission subunit, configured to transmit, according to the starting time, a time segment scheduled by the k+1th HE-SIGB segment within a time length or a number of symbols indicated by the time segment length field .
The device of claim 30, wherein the device further comprises:

And a control unit, configured to stop receiving the k+1th to Nth HE-SIGB segments when the public domain parsing error of the kth HE-SIGB segment is incorrect.
The device according to any one of claims 30 to 32, wherein the device further comprises:

And a processing unit, configured to discard the PPDU when the HE-SIGB does not include a HE-SIGB segment that matches the receiving end.
The device of claim 33, wherein

The processing unit is specifically configured to determine, according to the indication of the N-1th or Nth HE-SIGB segment, that the Nth HE-SIGB segment is the last HE-SIGB segment of the HE-SIGB segment And when the Nth HE-SIGB segment does not include scheduling information that matches the receiving end, the PPDU is discarded.
A wireless access point, comprising: a communication module,

The communication module is configured to send a first preamble portion; after transmitting the first preamble portion, send a high efficiency signaling domain A HE-SIGA, where the HE-SIGA is used to indicate an efficient signaling domain B HE - the number of symbols of the SIGB and the coded modulation scheme MCS of at least one HE-SIGB segment in the HE-SIGB; after transmitting the HE-SIGA, the HE-SIGB is transmitted, wherein the HE-SIGB is composed of N HEs a -SIGB segmentation, each of said HE-SIGB segments being independently coded, and each of said HE-SIGB segments comprising a common domain, wherein N ≥ 1; said N HE-SIGB segments are in turn Scheduling for N time segments; after transmitting the HE-SIGB, sequentially transmitting the first to N time segments according to scheduling of the N HE-SIGB segments, each of the Time segmentation includes efficient short training domain HE-STF, efficient long training domain HE-LTF and load domain.
A site, comprising: a communication module,

The communication module is configured to receive the first preamble portion; when determining, according to the first preamble portion, that the PPDU is of a specified type, receiving and parsing the high efficiency signaling domain A HE-SIGA; according to the indication by the HE-SIGA The number of symbols of the coded modulation scheme MCS and HE-SIGB receives and parses the HE-SIGB segment included in the efficient signaling domain B HE-SIGB; after receiving the HE-SIGB segment including the scheduling information matching the receiving end, The scheduling information in the HE-SIGB segment matching the receiving end determines and transmits a time segment carrying the data of the receiving end, wherein the time segment carrying the data of the receiving end is the N time segments included in the PPDU. One, where N ≥ 1.