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WO2017020283A1 - Procédé de génération de séquence he-ltf, dispositif de traitement, point d'accès et station - Google Patents

Procédé de génération de séquence he-ltf, dispositif de traitement, point d'accès et station Download PDF

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Publication number
WO2017020283A1
WO2017020283A1 PCT/CN2015/086184 CN2015086184W WO2017020283A1 WO 2017020283 A1 WO2017020283 A1 WO 2017020283A1 CN 2015086184 W CN2015086184 W CN 2015086184W WO 2017020283 A1 WO2017020283 A1 WO 2017020283A1
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WIPO (PCT)
Prior art keywords
ltf
papr value
ltf sequence
subcarrier
resource block
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PCT/CN2015/086184
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English (en)
Chinese (zh)
Inventor
薛鑫
王宁娟
刘乐
林伟
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华为技术有限公司
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Priority to PCT/CN2015/086184 priority Critical patent/WO2017020283A1/fr
Publication of WO2017020283A1 publication Critical patent/WO2017020283A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management

Definitions

  • the present invention relates to the field of wireless communication technologies and, more particularly, to a method, an access point, and a station for transmitting information.
  • WLAN Wireless Local Area Network
  • Orthogonal Frequency Division Multiplexing OFDM
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the OFDMA technology divides the air interface time-frequency resources into a plurality of orthogonal time-frequency resource blocks (RBs).
  • the RBs may be shared in time and orthogonal in the frequency domain.
  • the LTF of 80 MHz or the LTF of 160 MHz in the 802.11ac standard is used as a basic template, and the value of the carrier part corresponding to the resource block scheduled by the user in the OFDMA mode is extracted therefrom, and the value of the carrier part not corresponding to the resource block is padded with 0.
  • Embodiments of the present invention provide a method, an access point, and a station for transmitting LTF, which can reduce a peak average power ratio and improve channel estimation accuracy.
  • a method of transmitting an HE-LTF sequence comprising:
  • the HE-LTF sequence comprising a continuous sub-sequence Ga and a sub-sequence Gb, and +1 or -1 at a position of the spare leftover subcarrier; wherein Ga and Gb are complementary ;
  • the HE-LTF sequence is transmitted according to the RU size and the RU location in the resource allocation information.
  • the HE-LTF sequence further comprises: continuous -Ga and -Gb, or continuous +Ga and -Gb, or continuous -Ga and +Gb, or, or, continuous +Gb and -Ga, or part of Ga, Gb, -Ga, or -Gb.
  • the HE-LTF sequence is a downlink HE-LTF sequence sent by the AP, or is an uplink HE-LTF sequence sent by the STA.
  • an apparatus that can be used to perform the above method.
  • a site or access point containing the aforementioned means is also provided.
  • the foregoing method or device can solve the problem that in the 802.11ax standard scheme, in the OFDMA multi-user mode, the STA sends a HE-LTF sequence with a high PAPR, so that the PAPR value of the HE or LTF sequence sent by the STA or the AP is lower than the PAPR value of the data part. .
  • Figures 1a, 1b, and 1c are tone plans in an OFDMA transmission mode in 802.11ax.
  • 2a, 2b are schematic diagrams of PAPR if LTFs of 802.11ac are used.
  • FIG. 3 is a schematic diagram of a system architecture applicable to an embodiment of the present invention.
  • 4 and 5 are schematic flow charts of an embodiment of the present invention, respectively.
  • FIGS 6a-6d are schematic illustrations of various PAPRs in accordance with one embodiment of the present invention.
  • FIGS 7a-7d are schematic illustrations of various PAPRs in accordance with one embodiment of the present invention.
  • FIGS 8a-8e are schematic diagrams of various PAPRs in accordance with another embodiment of the present invention.
  • FIG. 9 is a block diagram of an access point in accordance with an embodiment of the present invention.
  • FIG. 10 is a block diagram of a station in accordance with an embodiment of the present invention.
  • An Access Point which can also be called a wireless access point or bridge or hotspot, can access a server or a communication network.
  • a station which may also be referred to as a user, may be a wireless sensor, a wireless communication terminal, or a mobile terminal, such as a mobile phone (or "cellular" phone) that supports WiFi communication functions and a computer with wireless communication capabilities.
  • a mobile phone or "cellular" phone
  • it may be a portable, pocket-sized, handheld, computer-built, wearable, or in-vehicle wireless communication device that supports WiFi communication functions, and exchanges communication data such as voice and data with the wireless access network.
  • 802.11ax is dedicated to further improving WLAN spectrum efficiency, regional throughput, actual user experience, and performance in a variety of indoor and outdoor dense network deployment environments.
  • the solution also requires suppression of inter-device interference to meet large-scale, high-load networking requirements. Wait.
  • OFDM symbols are constructed with 64-FFT in 20 MHz, 52 data subcarriers and 4 subcarriers in 56 subcarriers in total, and OFDM symbols are constructed with 128-FFT in 40 MHz, and 108 data subcarriers and 6 subcarriers in total 128 subcarriers
  • the carrier, while the 256-FFT constructs an OFDM symbol, has 234 data subcarriers and 8 subcarriers out of a total of 256 subcarriers.
  • the following tone plan (subcarrier distribution of data carrying) is adopted, and the positional relationship of different resource blocks (RU: resource unit) is as shown in FIG. 1a-1c, wherein the arrow indicates the residual subcarrier between the RUs.
  • the location, the number of large RU subcarriers and the corresponding number of small RUs that can be accommodated therein and the number of residual subcarriers between small RUs are the same. Referring to FIG.
  • FIG. 1a it is a simple schematic diagram of the location of an OFDMA resource block in a 20 MHz
  • FIG. 1b is a simplified location of an OFDMA resource block in a 40 MHz
  • a single schematic diagram, Figure 1c, is a simplified schematic diagram of the location of an OFDMA resource block within 80 MHz.
  • the OFDMA multi-user data packet in 802.11ax is a combination of multiple resource blocks (RU: resource unit).
  • the AP allocates one RU to each user.
  • the optional RUs that may be assigned to the user are:
  • RU consisting of 106 consecutive subcarriers: 24 data subcarriers and 2 pilot pilot subcarriers
  • RU consisting of 242 consecutive subcarriers: 234 data subcarriers and 8 pilot pilot subcarriers
  • RU consisting of 484 consecutive subcarriers: 468 data subcarriers and 16 pilot pilot subcarriers
  • RU consisting of 996 consecutive subcarriers: 980 data subcarriers and 16 pilot pilot subcarriers
  • 484-RU is used in 40MHz multi-user transmission
  • 996-RU is used in 80/160MHz multi-user transmission.
  • 160MHz can be seen as a combination of two 80MHz tone plans.
  • the HE-LTF for channel estimation in the 802.11ax system adopts two modes of 2x and 4x, the subcarrier number index of the 4x HE-LTF sequence mapping is the same as the data part tone plan, and the 2x HE-LTF serial number corresponds to 4x.
  • the number of HE-LTF numbers is divided by 2.
  • the tone plan of the OFDMA transmission in the 802.11ax system is different from the tone plan of the OFDM in the existing 802.11ac system. Therefore, the 20/40 VHT-LTF sequence defined in 802.11ac itself cannot be applied.
  • the total number of subcarriers of 80 MHz in 802.11ac is the same as the total number of subcarriers of 20 MHz in 802.11ax, but the peak value and the mean ratio (PAPR: Peak-to) are found directly in the 802.11ax 20 MHz bandwidth using the VHT-LTF sequence. -average power ratio) is relatively high. Referring to FIGS.
  • 802.11ax is in 40/80MHz tone plan, the number of subcarriers has exceeded the traditional sequence, and the VHT-LTF sequence of 802.11ac cannot be reused.
  • FIG. 3 is a simplified schematic diagram of a WLAN system to which an embodiment of the present invention is applied.
  • the system of Figure 3 includes one or more access points AP 101 and one or more stations STA 102.
  • the OFDMA technology is used for wireless communication between the access point 101 and the station 102.
  • 2x and 4x HE-LTF sequences that can be applied to the 20 MHz/40 MHz/80 MHz subcarrier plan of the aforementioned 802.11ax system.
  • the RUs of different sizes satisfy the low PAPR sequence, especially for the small RU (26/52-).
  • the edge user, the transmit power itself is close to the maximum value, and the lower PAPR can guarantee the working range of the amplifier.
  • at least part of the sequence in the present embodiment can also make the storage amount on the product low and easy to implement.
  • a method of transmitting an HE-LTF sequence including:
  • the HE-LTF sequence comprising a continuous sub-sequence Ga and a sub-sequence Gb, and +1 or -1 at a position of the spare leftover subcarrier; wherein Ga and Gb are complementary ;
  • the HE-LTF sequence is transmitted according to the RU size and the RU location in the resource allocation information.
  • the HE-LTF sequence further comprises: continuous -Ga and -Gb, or continuous +Ga and -Gb, or continuous -Ga and +Gb, or, or, continuous +Gb and -Ga.
  • the foregoing method may be a downlink HE-LTF sequence sent by the AP, or may be an uplink HE-LTF sequence sent by the STA.
  • a method is provided in which the receiving side receives and processes the corresponding HE-LTF sequence.
  • the access point AP sends a data packet PPDU (for example, 802.11ax), and the PPDU includes HE-LTF, HE-SIG-A, and HE-SIG-B, where the HE-SIG-A is included to indicate the downlink user.
  • the information of the STA transmission bandwidth includes information indicating the downlink scheduled STA ID and the RU size and location allocated for the STA, and the stream number in the HE-SIG-B.
  • the HE-LTF length that is, the number of symbols N, for indicating alignment of a plurality of users may be included in the HE-SIG-A or HE-SIG-B.
  • the process of sending the HE-LTF sequence in the process of sending the PPDU includes:
  • the AP selects a HE-LTF sequence corresponding to the bandwidth according to the transmission bandwidth size (refer to the total bandwidth shared by multiple users).
  • the AP selects a corresponding HE-LTF sequence segment from the HE-LTF sequence for each resource block RU size and RU location allocated by each downlink scheduled user, and each HE- The LTF sequence segments are mapped at the assigned RU subcarrier locations.
  • a scrambling Mask matrix of size NxN for example, P-matrix
  • Matrix or Walsh matrix or other suitable A row in the matrix is used as a signature for distinguishing the spatial stream.
  • the tone plan on the nth symbol of the HE-LTF removes the portion other than the pilot subcarrier position, multiplied by Corresponding to the nth bit codeword that distinguishes the feature code of the stream.
  • the protocol stipulates that the pilot participates in the scrambling, when the AP transmits the HE-LTF sequence of each stream on the RU, the subcarriers in the tone plan on the nth symbol of the HE-LTF are multiplied by the nth corresponding to the signature of the stream. Bit code word.
  • the scheduled STA receives the data packet PPDU (for example, 802.11ax), including the following processing:
  • the scheduled STA receives the HE-SIG-A, and obtains the total transmission bandwidth indicated in the HE-SIG-A.
  • S202 Select an HE-LTF sequence corresponding to the bandwidth according to the total bandwidth of the transmission
  • the scheduled STA receives the HE-SIG-B, and uses its own STA ID to identify its own scheduled indication information, where the AP allocates the RU size and the RU location allocated to the user.
  • Corresponding HE-LTF sequence segments are selected from the HE-LTF sequence according to the indicated RU size and location as a channel estimation reference sequence corresponding to the RU of the receiving end.
  • the scheduled STA receives the HE-LTF length N included in the HE-SIG-A or HE-SIG-B, and selects a scrambling Mask matrix of NxN (English may be Scramble) (for example, a P-matrix matrix or a Walsh matrix) As a code matrix for distinguishing spatial streams.
  • a scrambling Mask matrix of NxN English may be Scramble
  • a P-matrix matrix or a Walsh matrix for example, a P-matrix matrix or a Walsh matrix
  • the estimated reference sequence is multiplied by the nth codeword in the reference codeword corresponding to the stream, and constitutes a receiver reference sequence for receiving the nth HE-LTF symbol for channel estimation.
  • the AP indicates the uplink scheduling information by using the trigger frame, including the uplink user STA transmission bandwidth, the uplink scheduled STA ID, the RU size and location allocated for the STA, and the HE-LTF length of the uplink user aligned.
  • the STA transmits a data packet PPDU (for example, 802.11ax) according to the uplink scheduling information.
  • the STA selects a pair according to the indicated transmission bandwidth size (refer to the total bandwidth shared by multiple users).
  • the bandwidth should be HE-LTF sequence.
  • the STA selects a corresponding HE-LTF sequence segment from the HE-LTF sequence to be mapped on the allocated RU subcarrier position in the resource block RU size and the RU location allocated in the bandwidth (total bandwidth).
  • the STA repeats the HE-LTF sequence N times in time according to the indicated HE-LTF length. If the RU where the user is located includes multiple spatial streams or multi-user transmission, when the STA transmits the corresponding stream, the STA allocates according to the AP.
  • the i-th stream selects the i-th row in the scrambled Mask matrix of NxN (English may be Scramble) (for example, P-matrix matrix or Walsh matrix) as the signature of the distinguishing stream.
  • the subcarriers in the tone plan on the nth symbol of the HE-LTF are multiplied by the corresponding feature code corresponding to the stream. N-bit code word.
  • the method includes
  • the AP selects a HE-LTF sequence corresponding to the bandwidth according to the size of the transmission bandwidth.
  • the AP selects a corresponding HE-LTF sequence segment from the HE-LTF sequence in the resource block RU size and the RU location allocated to each uplink scheduled user in the total bandwidth as a reference sequence of the RU.
  • the HE-LTF reference sequence needs to be repeated N times in time, and the AP allocates one line in the P-matrix matrix of size NxN to each stream on the RU as a distinction.
  • the signature of the stream Specifically, the reference sequence on the nth HE-LTF symbol of each stream on the RU is multiplied by the nth bit codeword corresponding to the feature code used to distinguish the stream, and is used as a channel estimation for receiving the ith stream corresponding to the RU. Reference sequence for channel estimation.
  • the transmitter sends different HE-LTF sequences according to different bandwidth sizes, RU positions, and RU sizes, including (can be applied to 802.11ax).
  • the solution of this embodiment in the standard or other feasible standards may be combined with the foregoing embodiment 1 or embodiment 2) (not shown):
  • an LTF sequence (or a sequence for channel estimation, such as HE-LTF, which is a possible name) according to the bandwidth, the LTF sequence including a continuous sub-sequence Ga and a sub-sequence Gb, located at +1 or -1 on the leftover subcarrier position; the Ga and Gb sequences have a sequence pair of complementary characteristics.
  • the Ga and Gb sequences are a length of 26 or 13 or other lengths, and have mutual A sequence pair of complementary features.
  • Ga and Gb sequences are:
  • Ga ⁇ +1 +1 +1 +1 +1 -1 +1 +1 -1 +1 -1 +1 -1 +1 -1 +1 +1 +1 +1 -1 -1 + 1 +1 +1 ⁇
  • Gb ⁇ +1 -1 +1 +1 -1 -1 +1 -1 -1 -1 +1 +1 +1 +1 +1 +1 -1 -1 +1 +1 - 1 +1 -1 ⁇
  • the HE-LTF sequence may further include: continuous -Ga and -Gb, or continuous Ga and - Gb, or, continuous -Ga and Gb, or, continuous -Gb and Ga, or a portion of Ga, Gb, -Ga, or -Gb. Specifically, half of them such as Ga (1:13) and Ga (14:26), Gb (1:13), and Gb (14:26) can be omitted.
  • a method for constructing an HE-LTF sequence for the size and location of different resource blocks RU in an 802.11ax OFDMA tone plan including:
  • the length of the basic HE-LTF sequence being the same as the length of the small RU in the OFDMA transmission mode, such as 26, or 52.
  • the basic HE-LTF sequence is, for example, the aforementioned Ga or Gb.
  • HE-LTF sequence of a large RU by cascading a number of basic HE-LTF sequences after the phase rotation; further, fill the +1 or the position of the residual subcarriers between the small RUs corresponding to the large RU or -1.
  • the small RU is cascaded to the large RU, and the PAPR optimal PAPR sequence of each RU is selected as the HE-LTF sequence corresponding to the bandwidth.
  • the HE-LTF sequence constructed according to the foregoing method may be separately stored on the AP and the STA, so as to facilitate subsequent transmission.
  • the transmission process reference may be made to Embodiment 2 of the foregoing Embodiment.
  • a subcarrier allocation mode of 20 MHz bandwidth is used.
  • the RU size may be 26, 52, 106, 242 subcarriers as shown in FIG. 1a.
  • a plurality of HE-LTF sequences on the 4X symbol of the 20 MHz 242 subcarrier are provided in this embodiment, and only a few of them are listed below:
  • the HE-LTF sequence is as follows:
  • He_ltf_20mhz [ ⁇ 0,0,0,0,0 ⁇ ,...
  • HELTF -122,122 ⁇ +1,+Gb,-Ga,-1,+Gb,+Ga,+Ga(1:13),-1,-1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, consecutive +Gb and -Ga, or consecutive +Gb and +Ga, or continuous +Gb And -Ga, or, -Gb and -Ga, or Ga (1:13) and Ga (14:26).
  • Figure 6a is a schematic diagram of the PAPR (peak-to-average ratio) values of the HE-LTF sequence at 20 MHz bandwidth.
  • the first line of numbers is 3.01, 2.97, 3.01, 2.97, 3.01, 2.97, 3.01, 2.97, 3.01, 2.97, which in turn
  • the PAPR value corresponding to the first row 26 subcarrier resource block, that is, 3.01 refers to the PAPR value corresponding to the first 26 subcarrier resource blocks from left to right, and the next 2.97 refers to the second 26 subcarrier resources from left to right.
  • the block corresponds to the PAPR value, and so on; the second row number is 3.01, 3.00, 3.01, 3.00, which in turn is the PAPR value corresponding to the second row 52 subcarrier resource block, that is, the first 3.01 refers to the first from left to right.
  • the 52 subcarrier resource blocks correspond to the PAPR value, 3.00 refers to the PAPR value corresponding to the second 52 subcarrier resource blocks from left to right; the third row number is 4.00, 3.52, which in turn is the third row 106 subcarrier resource block corresponding
  • the PAPR value that is, the first 4.00 refers to the corresponding PAPR value of the first 106 subcarrier resource block from left to right, and 3.52 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right; the third row of numbers 4.28 corresponds to the PAPR value of the 242 subcarrier resource block.
  • the HE-LTF sequence is as follows:
  • He_ltf_20mhz [ ⁇ 0,0,0,0,0 ⁇ ,...
  • HELTF -122,122 ⁇ +1,-Ga,+Gb,-1,+Ga,+Gb,+Ga(1:13),+1,+1,
  • the HE-LTF sequence includes consecutive Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, consecutive -Ga and +Gb, or consecutive +Ga and +Gb, or continuous -Ga and -Gb, or, Ga (1:13) and Ga (14:26).
  • Figure 6b shows the PAPR value of the HE-LTF sequence at 20 MHz bandwidth.
  • the first row of numbers is 2.97, 3.01, 2.97, 3.01, 2.97, 3.01, 2.97, 3.01, 2.97, 3.01, which in turn is the PAPR value corresponding to the first row of 26 subcarrier resource blocks, that is, 2.97 refers to the first 26 from left to right.
  • the subcarrier resource block corresponds to the PAPR value
  • the next 3.01 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right.
  • the second row of numbers is 3.00, 3.01, 3.00, 3.01, which in turn is the PAPR value corresponding to the second row 52 subcarrier resource block, that is, the first 3.00 refers to the first 52 subcarrier resources from left to right.
  • the block corresponds to the PAPR value, and 3.01 refers to the PAPR value corresponding to the second 52 subcarrier resource block from left to right; the third row number is 3.81 and 3.90, which in turn is the PAPR value corresponding to the third row 106 subcarrier resource block, that is,
  • the first 3.81 refers to the corresponding PAPR value of the first 106 subcarrier resource blocks from left to right
  • 3.90 refers to the corresponding PAPR value of the second 106 subcarrier resource blocks from left to right
  • the third row of numbers 4.29 corresponds to 242.
  • the PAPR value of the subcarrier resource block 3.01 refers to the PAPR value corresponding to the second 52 subcarrier resource block from left to right
  • the third row number is 3.81 and 3.90, which in turn is the PAPR value corresponding to the third row 106 subcarrier resource block, that is,
  • the first 3.81 refers to the corresponding PAPR value of the first 106 subcarrier resource blocks from left to right
  • 3.90 refers to the
  • the HE-LTF sequence is as follows:
  • He_ltf_20mhz [ ⁇ 0,0,0,0,0 ⁇ ,...
  • HELTF -122,122 ⁇ +1,-Ga,+Gb,+1,+Ga,+Gb,+Gb(1:13),+1,-1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, consecutive -Ga and +Gb, or continuous +Ga and +Gb, or continuous -Ga And -Gb, or, Gb (1:13) and Gb (14:26).
  • Figure 6c shows the PAPR value of the HE-LTF sequence in the 20MHz bandwidth.
  • the first row of numbers is 2.97, 3.01, 2.97, 3.01, 2.97, 3.01, 2.97, 3.01, 2.97, 3.01, which in turn is the PAPR corresponding to the first row 26 subcarrier resource blocks.
  • the value, that is, 2.97 refers to the PAPR value corresponding to the first 26 subcarrier resource blocks from left to right, and the next 3.01 refers to the PAPR value corresponding to the second 26 subcarrier resource blocks from left to right, and so on;
  • the numbers are 3.00, 3.01, 3.00, 3.01, which in turn are the PAPR values corresponding to the second row 52 subcarrier resource blocks, that is, the first 3.00 refers to the first 52 subcarrier resource blocks from left to right.
  • the PAPR value corresponds to the PAPR value corresponding to the second 52 subcarrier resource block from left to right; the third row number is 3.94, 3.89, which in turn is the PAPR value corresponding to the third row 106 subcarrier resource block, that is, the first A 3.94 refers to the corresponding PAPR value of the first 106 subcarrier resource blocks from left to right, 3.89 refers to the corresponding PAPR value of the second 106 subcarrier resource blocks from left to right; the third line number 4.30 corresponds to 242 sub The PAPR value of the carrier resource block.
  • the HE-LTF sequence is as follows:
  • He_ltf_20mhz [ ⁇ 0,0,0,0,0 ⁇ ,...
  • HELTF -122,122 ⁇ +1,-Gb,+Ga,+1,+Gb,+Ga,+Gb(1:13),+1,-1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, consecutive -Gb and +Ga, or consecutive +Gb and +Ga, or continuous +Gb And -Ga, or, Gb (1:13) and Gb (14:26).
  • Figure 6d shows the PAPR value of the HE-LTF sequence in the 20 MHz bandwidth.
  • the first row of numbers is 3.01, 2.97, 3.01, 2.97, 3.01, 2.97, 3.01, 2.97, 3.01, 2.97, which in turn is the PAPR corresponding to the first row 26 subcarrier resource blocks.
  • the value, that is, 3.01 refers to the PAPR value corresponding to the first 26 subcarrier resource blocks from left to right, and the next 2.97 refers to the corresponding PAPR value of the second 26 subcarrier resource blocks from left to right, and so on;
  • the numbers are 3.01, 3.01, 3.01, and 3.01, which in turn are the PAPR values corresponding to the second row 52 subcarrier resource blocks, that is, the first 3.01 refers to the corresponding PAPR value of the first 52 subcarrier resource blocks from left to right.
  • Two 3.01 means that the second 52 subcarrier resource blocks correspond to PAPR from left to right.
  • the third row number is 3.69, 3.81, which in turn is the PAPR value corresponding to the third row 106 subcarrier resource block, that is, the first 3.69 refers to the PAPR value corresponding to the first 106 subcarrier resource block from left to right. 3.81 refers to the PAPR value corresponding to the second 106 subcarrier resource block from left to right; the third row number 4.45 corresponds to the PAPR value of the 242 subcarrier resource block.
  • FIG. 1b a schematic diagram of a subcarrier allocation manner of a possible 40 MHz bandwidth in the 802.11ax standard:
  • the RU size may be 26, 52, 106, 242, 484 subcarriers as shown.
  • HELTF -244,244 ⁇ +1,+Ga,-Gb,+1,-1,-Ga,-Gb,-1,+Ga,+1,+Ga,-Gb,+1,+1,+Ga, +Gb, -1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, continuous -Ga and -Gb, or continuous +Ga and +Gb, or continuous +Ga And -Gb, or, continuous -Ga and +Gb.
  • the first row number is 2.97, 3.01, 2.97, 3.01, etc., which in turn is the PAPR value corresponding to the first row 26 subcarrier resource block, ie 2.97 refers to The first 26 subcarrier resource blocks from left to right correspond to the PAPR value, and the next 3.01 refers to the PAPR value corresponding to the second 26 subcarrier resource blocks from left to right, and so on; the second row number is 3.01, 3.01.
  • 3.01, 3.01, etc. which in turn are the PAPR values corresponding to the second row 52 subcarrier resource blocks, that is, the first 3.01 refers to the corresponding PAPR value of the first 52 subcarrier resource blocks from left to right, and 3.01 refers to the left.
  • the second 52 subcarrier resource block to the right corresponds to the PAPR value;
  • the third row number is 3.92, 3.96, etc., which in turn is the PAPR value corresponding to the third row 106 subcarrier resource block, that is, the first 3.92 refers to the leftward direction.
  • the first 106 subcarrier resource block corresponds to the PAPR value, and 3.96 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right; the fourth row number is 4.48 and 4.46, which in turn is 242 subcarrier resource block corresponding
  • the PAPR value corresponds to the PAPR value of the 242 subcarrier resource block; the fifth line number 4.64 is the 484 subcarrier resource. Corresponding PAPR value.
  • He_ltf_40Mhz [ ⁇ 0,0,0,0,0,0,0,0,0,0,0,0 ⁇ ,...
  • HELTF -244,244 ⁇ +1,-Ga,-Gb,-1,-1,+Ga,-Gb,+1,-Gb,-1,-Ga,-Gb,+1,-1,-Ga, +Gb, -1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, continuous -Ga and -Gb, or continuous +Ga and +Gb, or continuous +Ga And -Gb, or, continuous -Ga and +Gb.
  • the first line number is 2.97, 3.01, 2.97, 3.01, etc., which is the PAPR value corresponding to the first row 26 subcarrier resource block from left to right. That is, 2.97 refers to the PAPR value corresponding to the first 26 subcarrier resource blocks from left to right, and the next 3.01 refers to the corresponding PAPR value of the second 26 subcarrier resource blocks from left to right, and so on; the second line is 3.01, 3.01, 3.01, 3.01, etc., from left to right, the PAPR value corresponding to the second row 52 subcarrier resource block, that is, the first 3.01 refers to the first 52 subcarrier resource block corresponding from left to right.
  • the PAPR value, 3.01 refers to the PAPR value corresponding to the second 52 subcarrier resource block from left to right; the third row number is 3.74, 3.81, etc., which is the PAPR corresponding to the third row 106 subcarrier resource block from left to right.
  • the value, that is, the first 3.74 refers to the PAPR value corresponding to the first 106 subcarrier resource block from left to right, and the 3.81 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right; the fourth line number is 4.59. 4.30, which is the PAPR value corresponding to the 242 subcarrier resource block from left to right, and 4.59 refers to the first 242 subcarrier from left to right.
  • the wave resource block corresponds to the PAPR value; the fifth row number 4.60 is the PAPR value corresponding to the 484 subcarrier resource block.
  • He_ltf_40Mhz [ ⁇ 0,0,0,0,0,0,0,0,0,0,0,0 ⁇ ,...
  • HELTF -244,244 ⁇ +1,-Gb,-Ga,+1,-1,-Gb,+Ga,-1,-Ga,+1,+Gb,+Ga,+1,+1,-Gb, +Ga, +1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, consecutive -Gb and -Ga, or consecutive -Gb and +Ga, or continuous +Gb And +Ga, or, continuous +Gb and -Ga.
  • the first row number is 3.01, 2.97, 3.01, 2.97, etc., which is the PAPR value corresponding to the first row 26 subcarrier resource block from left to right. That is, 3.0072 refers to the PAPR value corresponding to the first 26 subcarrier resource blocks from left to right, and the next 2.97 refers to the corresponding PAPR value of the second 26 subcarrier resource blocks from left to right, and so on; the second line is 3.01, 3.01, 3.01, 3.01, etc., from left to right, the PAPR value corresponding to the second row 52 subcarrier resource block, that is, the first 3.01 refers to the first 52 subcarrier resource block corresponding from left to right.
  • the PAPR value, 3.01 refers to the PAPR value corresponding to the second 52 subcarrier resource block from left to right; the third row number is 3.76, 3.87, etc., which is the PAPR corresponding to the third row 106 subcarrier resource block from left to right.
  • the value, that is, the first 3.76 refers to the PAPR value corresponding to the first 106 subcarrier resource block from left to right, and 3.87 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right;
  • the fourth line number is 4.59. 4.57, which is the PAPR value corresponding to the 242 subcarrier resource block from left to right, and 4.59 refers to the first 242 subtitle from left to right.
  • Wave PAPR value corresponding to the resource blocks; fifth line 484 is 4.59 digital value PAPR sub-carriers corresponding to the resource blocks.
  • He_ltf_40Mhz [ ⁇ 0,0,0,0,0,0,0,0,0,0,0,0 ⁇ ,...
  • HELTF -244,244 ⁇ +1,+Gb,+Ga,-1,-1,-Gb,+Ga,+1,-Gb,+1,-Gb,-Ga,-1,+1,-Gb, +Ga, -1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, consecutive -Gb and -Ga, or consecutive -Gb and +Ga, or continuous +Gb And +Ga, or, continuous +Gb and -Ga.
  • the first row number is 3.01, 2.97, 3.01, 2.97, etc., which is the PAPR value corresponding to the first row 26 subcarrier resource block from left to right. That is, 3.0072 refers to the PAPR value corresponding to the first 26 subcarrier resource blocks from left to right, and the next 2.97 refers to the corresponding PAPR value of the second 26 subcarrier resource blocks from left to right, and so on; the second line is 3.01, 3.01, 3.01, 3.01, etc., from left to right, the PAPR value corresponding to the second row 52 subcarrier resource block, that is, the first 3.01 refers to the first 52 subcarrier resource block corresponding from left to right.
  • the PAPR value, the second 3.01 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right; the third row number is 3.65, 3.88, etc., which is the third row 106 subcarrier resource block from left to right.
  • the corresponding PAPR value that is, the first 3.65 refers to the corresponding PAPR value of the first 106 subcarrier resource block from left to right, and 3.88 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right; the fourth row
  • the numbers are 4.57 and 4.52, which are the PAPR values corresponding to the 242 subcarrier resource blocks from left to right, and 4.57 refers to the first from left to right.
  • fifth line 484 is 4.62 digital subcarrier resource block corresponding PAPR value.
  • FIG. 1c it is a simple schematic diagram of a subcarrier allocation manner of an 80 MHz bandwidth in the 802.11ax standard.
  • the RU size may be 26, 52, 106, 242, 484, 996 subcarriers as shown in FIG. 1c.
  • He_ltf_80mhz [ ⁇ 0,0,0,0,0,0,0,0,0,0,0,0 ⁇ ,...
  • HELTF -500,500 ⁇ -1,-Ga,+Gb,+1,+1,+Ga,+Gb,-1,+Gb,-1,-Ga,+Gb,+1,+1,-Ga, -Gb, -1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, consecutive -Gb and -Ga, or consecutive -Gb and +Ga, or continuous +Gb And +Ga, or consecutive +Gb and -Ga, and the two lines of the red mark in the HE-LTF sequence are identical, and the two lines of the blue mark are opposite in polarity.
  • the 8a shows the PAPR value of the HE-LTF sequence in the 80 MHz bandwidth, the first line number is 2.97, 3.01, 2.97, 3.01, etc., which is the PAPR value corresponding to the first row 26 subcarrier resource block from left to right.
  • 2.97 refers to the PAPR value corresponding to the first 26 subcarrier resource blocks from left to right
  • the next 3.01 refers to the corresponding PAPR value of the second 26 subcarrier resource blocks from left to right, and so on
  • the second line is 3.01, 3.01, etc., from left to right
  • the PAPR value corresponding to the second row 52 subcarrier resource block that is, the first 3.01 refers to the PAPR value corresponding to the first 52 subcarrier resource block from left to right
  • the two 3.01s refer to the PAPR value corresponding to the second 52 subcarrier resource block from left to right
  • the third row number is 3.91, 3.91, etc., which is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right.
  • the first 3.91 refers to the PAPR value corresponding to the first 106 subcarrier resource block from left to right
  • the second 3.91 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right
  • the fourth row of numbers Is 4.51, 4.56, etc., from left to right, the PAPR value corresponding to the 242 subcarrier resource block, and 4.51 refers to the first from left to right.
  • the 242 subcarrier resource block corresponds to the PAPR value
  • the fifth row number is 4.70, 4.77, etc., which is the PAPR value corresponding to the 242 subcarrier resource block from left to right
  • 4.70 refers to the first 484 subcarrier resource from left to right.
  • the block corresponds to the PAPR value
  • the sixth line number 4.91 is the PAPR value corresponding to the 996 subcarrier subcarrier resource block.
  • He_ltf_80mhz [ ⁇ 0,0,0,0,0,0,0,0,0,0,0,0 ⁇ ,...
  • HELTF -500,500 ⁇ -1,-Ga,+Gb,+1,+1,+Ga,+Gb,-1,+Gb,-1,-Ga,+Gb,+1,+1,-Ga, -Gb, -1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, consecutive -Ga and +Gb, or continuous +Ga and +Gb, or continuous -Ga And +Gb, or, consecutive -Ga and -Gb, or, Gb (1:13) and Gb (14:26).
  • Figure 8b shows the PAPR value of the HE-LTF sequence in the 80MHz bandwidth.
  • the first row of numbers is 2.97, 3.01, 2.97, 3.01, etc., which is the PAPR value corresponding to the first row of 26 subcarrier resource blocks from left to right.
  • 2.97 refers to the PAPR value corresponding to the first 26 subcarrier resource blocks from left to right
  • the next 3.01 refers to the corresponding PAPR value of the second 26 subcarrier resource blocks from left to right, and so on
  • the second line is 3.01, 3.01, etc., from left to right
  • the PAPR value corresponding to the second row 52 subcarrier resource block that is, the first 3.01 refers to the PAPR value corresponding to the first 52 subcarrier resource block from left to right
  • the two 3.01s refer to the PAPR value corresponding to the second 52 subcarrier resource block from left to right
  • the third row number is 3.91, 3.91, etc., which is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right.
  • the first 3.91 refers to the PAPR value corresponding to the first 106 subcarrier resource block from left to right
  • the second 3.91 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right
  • the fourth row of numbers It is 4.50, 4.56, etc., which is the PAPR value corresponding to the 242 subcarrier resource block from left to right
  • 4.50 refers to the first from left to right.
  • the 242 subcarrier resource block corresponds to the PAPR value
  • the fifth row number is 4.70, 4.76, etc., which is the PAPR value corresponding to the 242 subcarrier resource block from left to right
  • 4.70 refers to the first 484 subcarrier resource from left to right.
  • the block corresponds to the PAPR value
  • the sixth line number 4.92 is the PAPR value corresponding to the 996 subcarrier subcarrier resource block.
  • He_ltf_80mhz [ ⁇ 0,0,0,0,0,0,0,0,0,0,0,0 ⁇ ,...
  • HE LTF -500,500 ⁇ +1,+Ga,-Gb,-1,-1,-Ga,-Gb,+1,-Ga,-1,+Ga,-Gb,+1,+1,+Ga , +Gb, -1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, +Ga and -Gb consecutive, or continuous -Ga and -Gb, or continuous +Ga And +Gb, or, consecutive -Ga and +Gb, or, Gb (1:13) and Gb (14:26).
  • Figure 8c shows the PAPR value of the HE-LTF sequence at 80MHz bandwidth.
  • the first line number is 2.97, 3.01. 2.97, 3.01, etc., from left to right, is the PAPR value corresponding to the first row 26 subcarrier resource block, that is, 2.97 refers to the PAPR value corresponding to the first 26 subcarrier resource block from left to right, and the next 3.01 It refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on; the second row number is 3.01, 3.01, etc., which is the PAPR corresponding to the second row 52 subcarrier resource block from left to right.
  • the value of the first 3.01 refers to the corresponding PAPR value of the first 52 subcarrier resource block from left to right, and the second 3.01 refers to the corresponding PAPR value of the second 52 subcarrier resource block from left to right; the third line
  • the number is 3.91, 3.96, etc., which is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right, that is, the first 3.91 refers to the corresponding PAPR value of the first 106 subcarrier resource block from left to right.
  • 3.96 refers to the PAPR value corresponding to the second 106 subcarrier resource block from left to right; the fourth row number is 4.53, 4.56, etc., which is the PAPR value corresponding to the 242 subcarrier resource block from left to right, and 4.53 refers to The first 242 subcarrier resource block from left to right corresponds to the PAPR value; the fifth row number is 4.90, 4.82, etc., from left to right. In turn, it is the PAPR value corresponding to the 242 subcarrier resource block, 4.90 refers to the PAPR value corresponding to the first 484 subcarrier resource block from left to right, and the sixth line number 4.97 is the PAPR value corresponding to the 996 subcarrier subcarrier resource block.
  • He_ltf_80mhz [ ⁇ 0,0,0,0,0,0,0,0,0,0,0,0 ⁇ ,...
  • HE LTF -500,500 ⁇ -1,+Gb,+Ga,-1,-1,-Gb,+Ga,-1,-Ga,-1,+Gb,+Ga,-1,+1,+Gb , -Ga, +1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, consecutive +Gb and +Ga, or consecutive -Gb and +Ga, or continuous +Gb And +Ga, or, continuous -Gb and -Ga, or Ga (1:13) and Ga (14:26).
  • Figure 8d shows the PAPR value of the HE-LTF sequence in the 80MHz bandwidth.
  • the first row of numbers is 3.01, 2.97, 3.01, 2.97, etc., which is the PAPR value corresponding to the first row 26 subcarrier resource blocks from left to right.
  • 3.01 refers to the PAPR value corresponding to the first 26 subcarrier resource blocks from left to right
  • the next 2.97 refers to the corresponding PAPR value of the second 26 subcarrier resource blocks from left to right, and so on
  • the second line is 3.01, 3.01, etc., from left to right
  • the PAPR value corresponding to the second row 52 subcarrier resource block that is, the first 3.01 refers to the PAPR value corresponding to the first 52 subcarrier resource block from left to right
  • the two 3.01s refer to the PAPR value corresponding to the second 52 subcarrier resource block from left to right
  • the third row number is 3.66, 3.77, etc., which is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right.
  • the first 3.66 refers to the PAPR value corresponding to the first 106 subcarrier resource blocks from left to right
  • 3.77 refers to the corresponding PAPR value of the second 106 subcarrier resource blocks from left to right
  • the fourth row number is 4.53. 4.54 and so on, from left to right, the PAPR value corresponding to the 242 subcarrier resource block
  • 4.53 refers to the first 242 subtitle from left to right.
  • the wave resource block corresponds to the PAPR value;
  • the fifth row number is 4.88, 4.86, etc., which is the PAPR value corresponding to the 242 subcarrier resource block from left to right, and 4.88 refers to the first 484 subcarrier resource block corresponding from left to right.
  • the PAPR value; the sixth line number 4.97 is the PAPR value corresponding to the 996 subcarrier subcarrier resource block.
  • He_ltf_80mhz [ ⁇ 0,0,0,0,0,0,0,0,0,0,0,0 ⁇ ,...
  • HE LTF -500,500 ⁇ -1,+Ga,+Gb,+1,-1,-Ga,+Gb,+1,-Ga,-1,-Ga,-Gb,+1,-1,-Ga , +Gb, +1,
  • the HE-LTF sequence includes Ga and Gb sequences, +1 or -1 at the left leftover subcarrier position, +Ga and +Gb consecutive, or continuous -Ga and +Gb, or continuous -Ga And -Gb, or, continuous +Ga and -Gb, or Ga (1:13) and Ga (14:26).
  • Figure 8e shows the PAPR value of the HE-LTF sequence in the 80MHz bandwidth.
  • the first row of numbers is 2.97, 3.01, 2.97, 3.01, etc., which is the PAPR corresponding to the first row 26 subcarrier resource blocks from left to right.
  • the value, that is, 2.97 refers to the PAPR value corresponding to the first 26 subcarrier resource blocks from left to right, and the next 3.01 refers to the PAPR value corresponding to the second 26 subcarrier resource blocks from left to right, and so on;
  • the number is 3.01, 3.01, etc., which is the PAPR value corresponding to the second row 52 subcarrier resource block from left to right, that is, the first 3.01 refers to the corresponding PAPR value of the first 52 subcarrier resource block from left to right.
  • the second 3.01 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right;
  • the third row number is 3.83, 3.81, etc., which is from the left to the right is the third row 106 subcarrier resource block corresponding to
  • the PAPR value that is, the first 3.83 refers to the PAPR value corresponding to the first 106 subcarrier resource blocks from left to right, and the 3.81 refers to the corresponding PAPR value of the second 106 subcarrier resource blocks from left to right;
  • the fourth line is 4.41, 4.59, etc., from left to right, the PAPR value corresponding to the 242 subcarrier resource block, and 4.41 refers to the PAPR value corresponding to the first 242 subcarrier resource block from left to right;
  • the fifth line number is 4.89, 4.90, etc.
  • Etc. from left to right, is the PAPR value corresponding to the 242 subcarrier resource block, and 4.89 refers to the first 484 from left to right.
  • the carrier resource block corresponds to the PAPR value; the sixth line number 4.99 is the PAPR value corresponding to the 996 subcarrier subcarrier resource block.
  • a method in which an STA transmits an HE-LTF sequence according to a RU size and a RU location in resource allocation information.
  • the HE-LTF sequence may be a HE-LTF sequence corresponding to a bandwidth of 20 MHz, 40 MHz, and 80 MHz, that is, an HE-LTF sequence given in each of the foregoing embodiments 1, 2, 3, 5, and 6;
  • the minimum resource block size at which the STA transmits data is represented by RU size ;
  • the RU location refers to the subcarrier position at which the STA transmits data, which is represented by RU idx .
  • the STA processes the sending HE-LTF sequence according to the following procedure:
  • the STA selects the HE-LTF sequence according to the bandwidth information, that is, when the bandwidth is 20 MHz, the STA selects the HE-LTF- 122 , 122 sequence, and when the bandwidth is 40 MHz, the STA selects the HE-LTF- 244 , 244 sequence, and when the bandwidth is 80 MHz, the STA selects the HE- LTF- 498,498 sequence;
  • S702 Select, according to the RU size and the RU location, a part of information transmission from the selected HE-LTF sequence, where the partial information may be an entire HE-LTF sequence, or may be part of information in the HE-LTF sequence. Let us take the 20MHz bandwidth and the RU size as 26, 52, 106, 242 as an example. The specific operations are as follows:
  • the HE-LTF sequence corresponding to the 20MHz bandwidth is:
  • HE-LTF -122,122 [+1,+Gb,-Ga,-1,+Gb,+Ga,+Ga(1:13),-1,-1,0,0,0,
  • HE-LTF -122,122 [0,+Gb,0 26 ,0,0 26 ,0 26 ,0 13 ,0,0,0,0,0,0,0,0,0 13 ,0 26 ,0 26 ,0 , 0 26 , 0];
  • 0 26 represents a continuous 26 0
  • 0 13 represents a continuous 13 0
  • HE-LTF -122,122 [0,0 26 ,-Ga,0,0 26 ,0 26 ,0 13 ,0,0,0,0,0,0,0,0 13 ,0 26 ,0 26 ,0 , 0 26 , 0];
  • 0 26 represents a continuous 26 0
  • 0 13 represents a continuous 13 0
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,+Gb,0 26 ,0 13 ,0,0,0,0,0,0,0,0,0 13 ,0 26 ,0 26 ,0 , 0 26 , 0];
  • 0 26 represents a continuous 26 0
  • 0 13 represents a continuous 13 0
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,0 26 ,+Ga,0 13 ,0,0,0,0,0,0,0,0 13 ,0 26 ,0 26 ,0 , 0 26 , 0];
  • 0 26 represents a continuous 26 0
  • 0 13 represents a continuous 13 0
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,0 26 ,0 26 ,+Ga(1:13),0,0,0,0,0,0,0,...
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,0 26 ,0 26 ,0 13 ,0,0,0,0,0,0,0,0 13 ,+Gb,0 26 ,0 , 0 26 , 0 26 , 0];
  • 0 26 represents a continuous 26 0
  • 0 13 represents a continuous 13 0
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,0 26 ,+Ga,0 13 ,0,0,0,0,0,0,0,0 13 ,0 26 ,-Ga,0 , 0 26 , 0 26 , 0];
  • 0 26 represents a continuous 26 0
  • 0 13 represents a continuous 13 0
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,0 26 ,+Ga,0 13 ,0,0,0,0,0,0,0,0,0 13 ,0 26 ,0 26 ,0 ,-Gb,0 26 ,0];
  • 0 26 represents a continuous 26 0
  • 0 13 represents a continuous 13 0
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,0 26 ,+Ga,0 13 ,0,0,0,0,0,0,0,0 13 ,0 26 ,0 26 ,0 ,0 26 ,-Ga,0];
  • 0 26 represents a continuous 26 0
  • 0 13 represents a continuous 13 0
  • HE-LTF -122,122 [0,+Gb,-Ga,0,0 26 ,0 26 ,0 13 ,0,0,0,0,0,0,0,0,0 13 ,0 26 ,0 26 ,0 , 0 26 , 0];
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,+Gb,+Ga,0 13 ,0,0,0,0,0,0,0,0,0 13 ,0 26 ,0 26 ,0 , 0 26 , 0];
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,0 26 ,0 26 ,0 13 ,0,0,0,0,0,0,0,0 13 ,+Gb,-Ga,0 , 0 26 , 0 26 , 0];
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,0 26 ,0 26 ,0 13 ,0,0,0,0,0,0,0,0 13 ,0 26 ,0 26 ,0 ,-Gb,-Ga,0];
  • HE-LTF -122,122 [0,+Gb,-Ga,0,+Gb,+Ga,0 13 ,0,0,0,0,0,0,0 13 ,0 26 ,0 26 ,0 , 0 26 , 0 26 , 0 26 , 0 26 , 0 26 , 0 26 , 0];
  • HE-LTF -122,122 [0,0 26 ,0 26 ,0,0 26 ,0 26 ,0 13 ,0,0,0,0,0,0,0,0 13 ,+Gb,-Ga,0 ,-Gb,-Ga,0];
  • HE-LTF -122,122 [+1,+Gb,-Ga,-1,+Gb,+Ga,+Ga(1:13),-1,-1,0,0,0,
  • the effective subcarrier position of the HE-LTF sequence on the 20x bandwidth 2x symbol is: -122:2:122.
  • it can be obtained by transforming the HE-LTF sequence on the 4x symbol. Listed below are several:
  • HELTF 2x (-122:2:122) HELTF 4x (-122:2:122)
  • HELTF 2x (-122:2:-2) HELTF 4x (-122:2:-2)
  • HELTF 2x (2:2:122) -HELTF 4x (2:2:122)
  • HELTF 2x (2:2:122) HELTF 4x (62:122)
  • HELTF 2x (2:2:122) -HELTF 4x (62:122)
  • the effective subcarrier position of the HE-LTF sequence on the 40x bandwidth 2x symbol is: -244:2:244.
  • sequence transformation on the 4x symbol can be obtained according to the HE-LTF sequence transformation on the 4x symbol:
  • HELTF 2x (4:2:244) -HELTF 4x (4:2:244)
  • HELTF 2x (-244:2:-4) HELTF 4x ((-244:2:-4)+0)
  • HELTF 2x (4:2:244) HELTF 4x ((-244:2:-4)+1)
  • HELTF 2x (-244:2:-4) HELTF 4x ((-244:2:-4)+0)
  • HELTF 2x (4:2:244) -HELTF 4x ((-244:2:-4)+1)
  • the effective subcarrier position of the HE-LTF sequence on the 80x bandwidth 2x symbol is: -500:2:500.
  • sequence transformation on the 4x symbol can be obtained according to the HE-LTF sequence transformation on the 4x symbol:
  • HELTF 2x (-500:2:500) HELTF 4x (-500:2:500)
  • HELTF 2x (4:2:500) -HELTF 4x (4:2:500)
  • HELTF 2x (-500:2:-4) HELTF 4x ((-500:2:-4)+1)
  • HELTF 2x (4:2:500) HELTF 4x (4:2:500)
  • HELTF 2x (-500:2:-4) HELTF 4x ((-500:2:-4)+1)
  • HELTF 2x (4:2:500) -HELTF 4x (4:2:500)
  • HELTF 2x (-500:2:-4) HELTF 4x ((4:2:500)-1)
  • HELTF 2x (4:2:500) HELTF 4x (4:2:500)
  • HELTF 2x (-500:2:-4) HELTF 4x ((4:2:500)-1)
  • HELTF 2x (4:2:500) -HELTF 4x (4:2:500)
  • a resource indication processing device (not shown) applied to a wireless local area network employing OFDMA technology, including a processing unit for performing the method in the foregoing implementation.
  • the processing unit may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or may implement or perform the embodiments of the present invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. It is easy to understand that the processing device indicated by the above resource may be located at an access point or a site.
  • FIG. 9 is a block diagram of an access point in accordance with another embodiment of the present invention.
  • the access point of Figure 9 includes an interface 101, a processing unit 102, and a memory 103.
  • Processing unit 102 controls the operation of access point 100.
  • Memory 103 can include read only memory and random access memory and provides instructions and data to processing unit 102.
  • a portion of the memory 103 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the various components of access point 100 are coupled together by a bus system 109, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as the bus system 109 in the figure.
  • the method for transmitting the foregoing various frames disclosed in the foregoing embodiments of the present invention may be applied to the processing unit 102 or implemented by the processing unit 102.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processing unit 102 or an instruction in the form of software.
  • the processing unit 102 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can be implemented or executed in an embodiment of the invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • Software modules can be located in random access memory, flash memory, read only Memory, programmable read only memory or electrically erasable programmable memory, registers, etc. are well-established in the field of storage media.
  • the storage medium is located in the memory 103, and the processing unit 102 reads the information in the memory 103 and completes the steps of the above method in combination with its hardware.
  • FIG. 10 is a block diagram of a station in accordance with another embodiment of the present invention.
  • the access point of FIG. 10 includes an interface 111, a processing unit 112, and a memory 113.
  • Processing unit 112 controls the operation of site 110.
  • Memory 113 can include read only memory and random access memory and provides instructions and data to processing unit 112.
  • a portion of the memory 113 may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • the various components of the site 110 are coupled together by a bus system 119, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 119 in the figure.
  • the method for receiving the foregoing various frames disclosed in the foregoing embodiments of the present invention may be applied to the processing unit 112 or implemented by the processing unit 112.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processing unit 112 or an instruction in a form of software.
  • the processing unit 112 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can be implemented or executed in an embodiment of the invention.
  • a general purpose processor can be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 113, and the processing unit 112 reads the information in the memory 113 and performs the steps of the above method in combination with its hardware.
  • the memory 113 stores an instruction that causes the processing unit 112 to perform resource status information indicating a busy state of a sub-resource of a channel resource for which the access point performs data transmission with the station; sending to the access point Resource status information, so that the access point performs resource allocation according to resource status information.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. You can choose some of them according to actual needs or All units are used to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure.
  • connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital STA line (DSL), or wireless technologies such as infrared, radio, and microwave
  • coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media.
  • a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé pour transmettre une séquence HE-LTF correspondante, qui comprend les étapes consistant : à déterminer une séquence HE-LTF selon une taille d'une largeur de bande, la séquence HE-LTF comprenant des sous-séquences continues Ga et Gb +1 ou -1 au niveau d'un emplacement de sous-porteuse restante, et Ga et Gb étant complémentaires ; et à transmettre la séquence HE-LTF selon une taille et un emplacement d'une RU dans des informations d'attribution de ressources.
PCT/CN2015/086184 2015-08-05 2015-08-05 Procédé de génération de séquence he-ltf, dispositif de traitement, point d'accès et station WO2017020283A1 (fr)

Priority Applications (1)

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US10616882B2 (en) 2015-08-26 2020-04-07 Huawei Technologies Co., Ltd. Method for transmitting HE-LTF sequence and apparatus
US10645687B2 (en) 2015-08-26 2020-05-05 Huawei Technologies Co., Ltd. Method for transmitting HE-LTF sequence and apparatus
US11265873B2 (en) 2015-08-26 2022-03-01 Huawei Technologies Co., Ltd. Method for transmitting HE-LTF sequence and apparatus
US11843493B2 (en) 2015-08-26 2023-12-12 Huawei Technologies Co., Ltd. Method for transmitting HE-LTF sequence and apparatus
US10615936B2 (en) 2015-09-01 2020-04-07 Huawei Technologies Co., Ltd. Method and apparatus for transmitting wireless local area network information
US10616027B2 (en) 2015-11-23 2020-04-07 Huawei Technologies Co., Ltd. Data transmission method and apparatus in wireless local area network
US10686640B2 (en) 2015-11-23 2020-06-16 Huawei Technologies Co., Ltd. Data transmission method and apparatus in wireless local area network
US10999119B2 (en) 2015-11-23 2021-05-04 Huawei Technologies Co., Ltd. Data transmission method and apparatus in wireless local area network
US11677606B2 (en) 2015-11-23 2023-06-13 Huawei Technologies Co., Ltd. Data transmission method and apparatus in wireless local area network

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