Resource unit indication method, device, storage medium, and computer program

Abstract

To provide a resource unit indication method, a device, and a storage medium.SOLUTION: A method includes transmitting by an access point (AP) a physical protocol data unit (PPDU) to a plurality of stations (STA). Here, the transmission bandwidth of the PPDU is divided into M subblocks, M is an integer greater than 1, the transmission bandwidth is greater than or equal to 80 MHz, the PPDU includes M first fields, the M first fields are in a one-to-one correspondence with the M subblocks, the first field is transmitted on a corresponding subblock, and the first field is used to indicate a resource unit RU allocated by the AP to at least one of the plurality of stations STA. Therefore, data transmission in a larger bandwidth is supported at fewer overheads.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] This application relates to the field of communication technologies, and particularly to a resource unit indication method, apparatus, and storage medium.

Background Art

[0002] Currently, 802.11ax provides a method for indicating resource units (RUs) for downlink (DL) orthogonal frequency division multiple access (OFDMA) and downlink (DL) multi-user (MU) multiple input multiple output (MIMO). The transmitting side sends a physical protocol data unit (PPDU). The PPDU includes a high efficient-signal field-A (HE-SIG-A) and a high efficient-signal field-B (HE-SIG-B). HE-SIG-A is used to indicate the symbol length of HE-SIG-B, the modulation and coding scheme (MCS) of HE-SIG-B, and the bandwidth of the entire PPDU. When the bandwidth of the PPDU is greater than 20 MHz, HE-SIG-A is replicated every 20 MHz and then transmitted. The PPDU further includes HE-SIG-B that provides resource indication information for DL MU MIMO and DL OFDMA. First, HE-SIG-B is individually coded every 20 MHz. The coding structure of HE-SIG-B every 20 MHz is shown in FIG. 1. FIG. 1 is a schematic diagram of the coding structure of HE-SIG-B every 20 MHz according to an embodiment of the present application. The entire HE-SIG-B is divided into two parts: a common field and a field for each STA. The common field includes one to N resource unit allocation subfields, a center 26-tone resource unit indication field that exists when the bandwidth is greater than or equal to 80 MHz, a cyclic redundancy code (CRC) subfield used for checking, and a tail subfield used for periodic decoding.In addition, each STA field has M STA fields (User Fields) numbered from 1 in the order of resource unit allocation. Usually, every two of the M STA fields form a group. Except that the last group may have one or two STA fields, each pair of STA fields is followed by one CRC field and one end field.

[0003] The indication method of the resource unit allocation subfield depends on the tone plans in different PPDU bandwidths of 802.11ax. For example, FIG. 2 is a schematic diagram of an 80 MHz tone plan and an RU plan according to an embodiment of the present application. As shown in FIG. 2, when the bandwidth is 80 MHz, the entire bandwidth includes four resource units in units of 242-tone RUs. In particular, a central 26-tone RU including two 13-tone subunits further exists at the center of the entire bandwidth. Alternatively, the entire bandwidth may include an entire 996-tone RU, or may include various combinations of 26-tone RUs, 52-tone RUs, 106-tone RUs, 242-tone RUs, and 484-tone RUs. Further, in the unit of 242-tone RUs, the leftmost side of FIG. 2 can be regarded as the lowest frequency, and the rightmost side of FIG. 2 can be regarded as the highest frequency. The RUs within the 242-tone RU range can be numbered from left to right.

[0004] Furthermore, 802.11ax introduces the concept of a Content Channel (CC). FIG. 3 is a schematic diagram of the HE-SIG-B indication in an 80 MHz PPDU bandwidth according to an embodiment of the present application. As shown in FIG. 3, when the PPDU bandwidth is 80 MHz, there are a total of two CCs and four channels. Therefore, the resource unit allocation information is overall indicated to the four channels based on the structure of CC1, CC2, CC1, CC2 in ascending order of frequency. CC1 includes a resource unit allocation subfield within the range of the first and third 242-tone RUs and a per-STA field corresponding to each STA within that range. CC2 includes a resource unit subfield within the range of the second and fourth 242-tone RUs and a per-STA field corresponding to each STA within that range. In addition, the 26-tone RU indication in the center of 80 MHz is held in each of the two CCs and indicates whether the resource unit is used to transmit data.

[0005] In summary, in the prior art, resource unit indication in cases from 20 MHz to 160 MHz is implemented, which brings a relatively large overhead. For example, when the PPDU bandwidth is 80 MHz, each CC includes two resource unit allocation indication subfields and per-STA fields for all users in two 242-tone RUs, resulting in a relatively large overhead. When a 320 MHz PPDU bandwidth is considered in the next-generation standard, the overhead doubles further. Therefore, how the new PPDU in the 802.11ax next-generation standard supports OFDMA or MU-MIMO transmission with less overhead in a wider bandwidth (e.g., 320 MHz) is an issue that needs to be considered in the present application. SUMMARY OF THE INVENTION

[0006] The present application provides a resource unit indication method, apparatus, and storage medium to support data transmission with less overhead in a wider bandwidth.

[0007] According to the first aspect, the present application provides a resource unit indication method, the method comprising: when an AP transmits a physical protocol data unit (PPDU) to a plurality of STAs, wherein the transmission bandwidth of the PPDU is divided into M sub-blocks, M being an integer greater than 1, the transmission bandwidth being greater than or equal to 80 MHz, the PPDU including M first fields, the M first fields being in one-to-one correspondence with the M sub-blocks, the first field being transmitted on the corresponding sub-block, and the first field being used to indicate a resource unit (RU) allocated by the AP to at least one of the plurality of STAs, the step of transmitting.

[0008] According to the second aspect, the present application provides a resource unit indication method, the method comprising: when an STA receives a PPDU transmitted by an AP, wherein the transmission bandwidth of the PPDU is divided into M sub-blocks, M being an integer greater than 1, the transmission bandwidth being greater than or equal to 80 MHz, the PPDU including M first fields, the M first fields being in one-to-one correspondence with the M sub-blocks, the first field being transmitted on the corresponding sub-block, and the first field being used to indicate a resource unit (RU) allocated by the AP to at least one of the plurality of STAs, the STA being one of the plurality of STAs, the step of receiving, and the step of the STA transmitting uplink data based on the first field.

[0009] The present application includes the following beneficial effects: According to the resource unit indication method provided in the first aspect or the second aspect, data transmission in a wider bandwidth is supported with less overhead.

[0010] Optionally, if the RU is greater than the maximum RU included in the sub - block corresponding to the first field, the RU is a combination of sub - blocks including a plurality of sub - blocks, or the RU is a combination of segments including all or some of the segments included in the plurality of sub - blocks. In other words, the present application implements a method of instructing a combination of sub - blocks or a combination of segments.

[0011] In a possible implementation, the PPDU further includes indication information, and the indication information is used to indicate the number of STAs transmitting data in the RU.

[0012] Optionally, when the transmission bandwidth is 320 MHz and M = 4, the RU is a combination of sub - blocks. Correspondingly, the correspondence between the first field and the combination of sub - blocks is one of the following: When the first field is the first value, the combination of sub - blocks is the combination of the first sub - block and the second sub - block. When the first field is the second value, the combination of sub - blocks is the combination of the first sub - block and the third sub - block. When the first field is the third value, the combination of sub - blocks is the combination of the first sub - block and the fourth sub - block. When the first field is the fourth value, the combination of sub - blocks is the combination of the second sub - block and the third sub - block. When the first field is the fifth value, the combination of sub - blocks is the combination of the second sub - block and the fourth sub - block. When the first field is the sixth value, the combination of sub - blocks is the combination of the third sub - block and the fourth sub - block. When the first field is the seventh value, the combination of sub - blocks is the combination of the first sub - block, the second sub - block, and the third sub - block. When the first field is the eighth value, the combination of sub - blocks is the combination of the first sub - block, the second sub - block, and the fourth sub - block. When the first field is the ninth value, the combination of sub - blocks is the combination of the first sub - block, the third sub - block, and the fourth sub - block. When the first field is the tenth value, the combination of sub - blocks is the combination of the second sub - block, the third sub - block, and the fourth sub - block. When the first field is the eleventh value, the combination of sub - blocks is the combination of the first sub - block, the second sub - block, the third sub - block, and the fourth sub - block. The first sub - block, the second sub - block, the third sub - block, and the fourth sub - block are four different sub - blocks.

[0013] Optionally, the length of the first field is 8 bits.

[0014] Optionally, when the transmission bandwidth is 320 MHz and M = 2, the RU is a combination of segments. Correspondingly, the correspondence between the first field and the combination of segments is one of the following: When the first field is the first value, the combination of segments is the combination of the first segment, the second segment, and the third segment. When the first field is the second value, the combination of segments is the combination of the first segment, the second segment, and the fourth segment. When the first field is the third value, the combination of segments is the combination of the first segment, the third segment, and the fourth segment. When the first field is the fourth value, the combination of segments is the combination of the second segment, the third segment, and the fourth segment. When the first field is the fifth value, the combination of segments is the combination of the first segment, the second segment, the third segment, and the fourth segment. The first segment and the second segment constitute one of the M sub-blocks, and the third segment and the fourth segment constitute the other one of the M sub-blocks.

[0015] Optionally, the length of the first field is 8 bits.

[0016] In another possible implementation, the first field is further used to indicate the number of STAs transmitting data in the RU.

[0017] Optionally, when the transmission bandwidth is 320 MHz and M = 4, the RU is a combination of sub-blocks. Correspondingly, the correspondence between the first field and the number of STAs that transmit data by using the combination of sub-blocks and the combination of sub-blocks includes at least one of the following: When the first field is the first value, the combination of sub-blocks is a combination of the first sub-block and the second sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the first number. When the first field is the second value, the combination of sub-blocks is a combination of the first sub-block and the third sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the second number. When the first field is the third value, the combination of sub-blocks is a combination of the first sub-block and the fourth sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the third number. When the first field is the fourth value, the combination of sub-blocks is a combination of the second sub-block and the third sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the fourth number. When the first field is the fifth value, the combination of sub-blocks is a combination of the second sub-block and the fourth sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the fifth number. When the first field is the sixth value, the combination of sub-blocks is a combination of the third sub-block and the fourth sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the sixth number. When the first field is the seventh value, the combination of sub-blocks is a combination of the first sub-block, the second sub-block, and the third sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the seventh number.When the first field is the eighth value, the combination of sub-blocks is a combination of the first sub-block, the second sub-block, and the fourth sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the eighth number. When the first field is the ninth value, the combination of sub-blocks is a combination of the first sub-block, the third sub-block, and the fourth sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the ninth number. When the first field is the tenth value, the combination of sub-blocks is a combination of the second sub-block, the third sub-block, and the fourth sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the tenth number. When the first field is the eleventh value, the combination of sub-blocks is a combination of the first sub-block, the second sub-block, the third sub-block, and the fourth sub-block, and the number of STAs that transmit data by using the combination of sub-blocks is the eleventh number. The first sub-block, the second sub-block, the third sub-block, and the fourth sub-block are four different sub-blocks among the M sub-blocks.

[0018] Optionally, the length of the first field is 9 bits.

[0019] Optionally, when the transmission bandwidth is 320 MHz and M = 2, the RU is a combination of segments. Correspondingly, the correspondence between the first field and the combination of segments and the number of STAs that transmit data by using the combination of segments includes at least one of the following: When the first field is the first value, the combination of segments is the combination of the first segment, the second segment, and the third segment, and the number of STAs that transmit data by using the combination of segments is the first number. When the first field is the second value, the combination of segments is the combination of the first segment, the second segment, and the fourth segment, and the number of STAs that transmit data by using the combination of segments is the second number. When the first field is the third value, the combination of segments is the combination of the first segment, the third segment, and the fourth segment, and the number of STAs that transmit data by using the combination of segments is the third number. When the first field is the fourth value, the combination of segments is the combination of the second segment, the third segment, and the fourth segment, and the number of STAs that transmit data by using the combination of segments is the fourth number. When the first field is the fifth value, the combination of segments is the combination of the first segment, the second segment, the third segment, and the fourth segment, and the number of STAs that transmit data by using the combination of segments is the fifth number. The first segment and the second segment constitute one of the M sub-blocks, and the third segment and the fourth segment constitute the other one of the M sub-blocks.

[0020] Optionally, each of the first fields is 9 bits.

[0021] Optionally, the RU includes a sub-block corresponding to the first field, as a result of which the resource overhead is further reduced.

[0022] Optionally, the PPDU further includes M second fields, where the M second fields have a one-to-one correspondence with the M first fields, and the second field includes at least one of the following information: the number of symbols in the first field corresponding to the second field, the modulation and coding scheme MCS of the first field corresponding to the second field, the compression mode of the first field corresponding to the second field, the transmission bandwidth of the PPDU, the basic service set color, the guard interval, and the long training sequence size.

[0023] Optionally, the PPDU includes N physical protocol data sub-units, where N is less than or equal to M, resulting in improved flexibility in data transmission.

[0024] According to a third aspect, the present application provides a resource unit indication method, the method comprising the step of the AP transmitting a PPDU to a plurality of STAs, where the PPDU includes M trigger frames, where M is an integer greater than 1, where the transmission bandwidth of the PPDU is divided into M sub-blocks, the transmission bandwidth being greater than or equal to 40 MHz, the M trigger frames having a one-to-one correspondence with the M sub-blocks, the trigger frame including a first field, the first field being transmitted on the sub-block corresponding to the trigger frame, the first field being used to indicate a resource unit RU allocated by the AP to at least one of the plurality of STAs, the step of transmitting.

[0025] According to a fourth aspect, the present application provides a resource unit indication method, the method comprising the step of the STA receiving a PPDU transmitted by the AP, where the PPDU includes M trigger frames, M being an integer greater than 1, where the transmission bandwidth of the PPDU is divided into M sub-blocks, the transmission bandwidth being greater than or equal to 40 MHz, the M trigger frames having a one-to-one correspondence with the M sub-blocks, the trigger frame including a first field, the first field being transmitted on the sub-block corresponding to the trigger frame, the first field being used to indicate a resource unit (RU) assigned by the AP to at least one of a plurality of STAs, the STA being any one of the plurality of STAs, the receiving step, and the step of the STA transmitting uplink data based on the first field.

[0026] Optionally, when the RU is larger than the maximum RU included in the sub-block corresponding to the first field, the RU is a combination of sub-blocks including a plurality of sub-blocks, or the RU is a combination of segments including all or some of the segments included in the plurality of sub-blocks.

[0027] Optionally, when the transmission bandwidth is 320 MHz and M = 4, the RU is a combination of sub-blocks. Correspondingly, the correspondence between the first field and the combination of sub-blocks is one of the following: When the first field is the first value, the combination of sub-blocks is the combination of the first sub-block and the second sub-block. When the first field is the second value, the combination of sub-blocks is the combination of the first sub-block and the third sub-block. When the first field is the third value, the combination of sub-blocks is the combination of the first sub-block and the fourth sub-block. When the first field is the fourth value, the combination of sub-blocks is the combination of the second sub-block and the third sub-block. When the first field is the fifth value, the combination of sub-blocks is the combination of the second sub-block and the fourth sub-block. When the first field is the sixth value, the combination of sub-blocks is the combination of the third sub-block and the fourth sub-block. When the first field is the seventh value, the combination of sub-blocks is the combination of the first sub-block, the second sub-block, and the third sub-block. When the first field is the eighth value, the combination of sub-blocks is the combination of the first sub-block, the second sub-block, and the fourth sub-block. When the first field is the ninth value, the combination of sub-blocks is the combination of the first sub-block, the third sub-block, and the fourth sub-block. When the first field is the tenth value, the combination of sub-blocks is the combination of the second sub-block, the third sub-block, and the fourth sub-block. When the first field is the eleventh value, the combination of sub-blocks is the combination of the first sub-block, the second sub-block, the third sub-block, and the fourth sub-block. The first sub-block, the second sub-block, the third sub-block, and the fourth sub-block are four different sub-blocks among the M sub-blocks.

[0028] Optionally, the length of the first field is 8 bits.

[0029] Optionally, when the transmission bandwidth is 320 MHz and M = 2, the RU is a combination of segments, and correspondingly, the correspondence between the first field and the combination of segments includes at least one of the following: When the first field is the first value, the combination of segments is the combination of the first segment, the second segment, and the third segment. When the first field is the second value, the combination of segments is the combination of the first segment, the second segment, and the fourth segment. When the first field is the third value, the combination of segments is the combination of the first segment, the third segment, and the fourth segment. When the first field is the fourth value, the combination of segments is the combination of the second segment, the third segment, and the fourth segment. When the first field is the fifth value, the combination of segments is the combination of the first segment, the second segment, the third segment, and the fourth segment. The first segment and the second segment constitute one of the M sub-blocks, and the third segment and the fourth segment constitute the other one of the M sub-blocks.

[0030] Optionally, the first field is 8 bits.

[0031] Optionally, when divided into M sub-blocks in a unit with a transmission bandwidth of 160 MHz, the trigger frame further includes a second field. When the second field is a first value and the RU is less than or equal to the RU of 996 tones, the first value is used to indicate that the RU belongs to the primary 80 MHz in the sub-block corresponding to the trigger frame, or when the second field is a second value and the RU is less than or equal to the RU of 996 tones, the second value is used to indicate that the RU belongs to the secondary 80 MHz in the sub-block corresponding to the trigger frame, or when the second field is a first value and the RU is less than or equal to the RU of 996 tones, the first value is used to indicate that the RU belongs to the low-frequency 80 MHz in the sub-block corresponding to the trigger frame, or when the second field is a second value and the RU is less than or equal to the RU of 996 tones, the second value is used to indicate that the RU belongs to the high-frequency 80 MHz in the sub-block corresponding to the trigger frame.

[0032] Optionally, when the transmission bandwidth is 320 MHz, the trigger frame further includes a third field. When the third field is a first value and the RU is less than or equal to the RU of 996 tones, the first value is used to indicate that the RU belongs to the lowest frequency 80 MHz in the transmission bandwidth, or when the third field is a second value and the RU is less than or equal to the RU of 996 tones, the second value is used to indicate that the RU belongs to the second lowest frequency 80 MHz in the transmission bandwidth, or when the third field is a third value and the RU is less than or equal to the RU of 996 tones, the third value is used to indicate that the RU belongs to the second highest frequency 80 MHz in the transmission bandwidth, or when the third field is a fourth value and the RU is less than or equal to the RU of 996 tones, the fourth value is used to indicate that the RU belongs to the highest frequency 80 MHz in the transmission bandwidth, or when the third field is a first value and the RU is less than or equal to the RU of 996 tones, the first value is used to indicate that the RU belongs to the primary 80 MHz in the transmission bandwidth, or when the third field is a second value and the RU is less than or equal to the RU of 996 tones, the second value is used to indicate that the RU belongs to the first secondary 80 MHz in the transmission bandwidth, or when the third field is a third value and the RU is less than or equal to the RU of 996 tones, the third value is used to indicate that the RU belongs to the second secondary 80 MHz in the transmission bandwidth, or when the third field is a fourth value and the RU is less than or equal to the RU of 996 tones, the fourth value is used to indicate that the RU belongs to the third secondary 80 MHz in the transmission bandwidth.

[0033] Optionally, the RU includes a sub-block corresponding to the first field.

[0034] According to a fifth aspect, the present application provides a resource unit indicating device. The device is an access point AP and includes a processing module and a transmission module. The processing module is configured to generate a physical protocol data unit PPDU, and the transmission module is configured to transmit the PPDU to a plurality of stations STA. Here, the transmission bandwidth of the PPDU is divided into M sub-blocks, where M is an integer greater than 1. Here, the transmission bandwidth is greater than or equal to 80 MHz. The PPDU includes M first fields, and the M first fields have a one-to-one correspondence with the M sub-blocks. The first field is transmitted on the corresponding sub-block, and the first field is used to indicate a resource unit RU allocated by the AP to at least one of the plurality of stations STA.

[0035] According to a sixth aspect, the present application provides a resource unit indicating device. The device is a station STA and includes a reception module and a processing module. The reception module is configured to receive a physical protocol data unit PPDU transmitted by an access point AP, where the transmission bandwidth of the PPDU is divided into M sub-blocks, where M is an integer greater than 1. Here, the transmission bandwidth is greater than or equal to 80 MHz. The PPDU includes M first fields, and the M first fields have a one-to-one correspondence with the M sub-blocks. The first field is transmitted on the corresponding sub-block, and the first field is used to indicate a resource unit RU allocated by the AP to at least one of the plurality of STAs, where the STA is any one of the plurality of STAs, and the reception module is configured to perform the reception. The processing module is configured to analyze the PPDU based on the first field.

[0036] According to a seventh aspect, the present application provides a resource unit indicating apparatus. The apparatus is an access point AP and includes a processing module and a transmission module. The processing module is configured to generate a physical protocol data unit PPDU, and the transmission module is to transmit the PPDU to a plurality of stations STA, where the PPDU includes M trigger frames, M being an integer greater than 1, where the transmission bandwidth of the PPDU is divided into M sub-blocks, the transmission bandwidth being greater than or equal to 40 MHz, the M trigger frames being in a one-to-one correspondence with the M sub-blocks, the trigger frame including a first field, the first field being transmitted on the sub-block corresponding to the trigger frame, the first field being used to indicate a resource unit RU assigned by the AP to at least one of the plurality of STAs, and is configured to perform the transmission.

[0037] According to an eighth aspect, the present application provides a resource unit indicating apparatus. The apparatus is a station STA and includes a reception module and a processing module. The reception module is to receive a physical protocol data unit PPDU transmitted by an access point AP, where the PPDU includes M trigger frames, M being an integer greater than 1, where the transmission bandwidth of the PPDU is divided into M sub-blocks, the transmission bandwidth being greater than or equal to 40 MHz, the M trigger frames being in a one-to-one correspondence with the M sub-blocks, the trigger frame including a first field, the first field being transmitted on the sub-block corresponding to the trigger frame, the first field being used to indicate a resource unit RU assigned by the AP to at least one of the plurality of STAs, and the STA being any one of the plurality of STAs, and is configured to perform the reception, and the processing module is configured to transmit uplink data based on the first field.

[0038] According to a ninth aspect, the present application provides a resource unit indicating device. The device is an access point AP and includes a processor and a transmitter. The processor is configured to generate a physical protocol data unit PPDU, and the transmitter is configured to transmit the PPDU to a plurality of stations STAs. Here, the transmission bandwidth of the PPDU is divided into M sub-blocks, where M is an integer greater than 1. Here, the transmission bandwidth is greater than or equal to 80 MHz. The PPDU includes M first fields, and the M first fields have a one-to-one correspondence with the M sub-blocks. The first field is transmitted on the corresponding sub-block, and the first field is used to indicate a resource unit RU allocated by the AP to at least one of the plurality of stations STAs.

[0039] According to a tenth aspect, the present application provides a resource unit indicating device. The device is a station STA and includes a receiver and a processor. The receiver is configured to receive a physical protocol data unit PPDU transmitted by an access point AP, where the transmission bandwidth of the PPDU is divided into M sub-blocks, where M is an integer greater than 1. Here, the transmission bandwidth is greater than or equal to 80 MHz. The PPDU includes M first fields, and the M first fields have a one-to-one correspondence with the M sub-blocks. The first field is transmitted on the corresponding sub-block, and the first field is used to indicate a resource unit RU allocated by the AP to at least one of the plurality of STAs, and the STA is any one of the plurality of STAs. The receiver is configured to receive, and the processor is configured to analyze the PPDU based on the first field.

[0040] According to the 11th aspect, the present application provides a resource unit indicating apparatus. The apparatus is an access point AP and includes a processor and a transmitter. The processor is configured to generate a physical protocol data unit PPDU, and the transmitter is configured to transmit the PPDU to a plurality of stations STA, where the PPDU includes M trigger frames, M is an integer greater than 1, and where the transmission bandwidth of the PPDU is divided into M sub-blocks, the transmission bandwidth is greater than or equal to 40 MHz, the M trigger frames have a one-to-one correspondence with the M sub-blocks, the trigger frame includes a first field, the first field is transmitted on the sub-block corresponding to the trigger frame, and the first field is used to indicate a resource unit RU assigned by the AP to at least one of the plurality of STAs, and is configured to perform the transmission.

[0041] According to the 12th aspect, the present application provides a resource unit indicating apparatus. The apparatus is a station STA and includes a receiver and a processor. The receiver is configured to receive a physical protocol data unit PPDU transmitted by an access point AP, where the PPDU includes M trigger frames, M is an integer greater than 1, and where the transmission bandwidth of the PPDU is divided into M sub-blocks, the transmission bandwidth is greater than or equal to 40 MHz, the M trigger frames have a one-to-one correspondence with the M sub-blocks, the trigger frame includes a first field, the first field is transmitted on the sub-block corresponding to the trigger frame, the first field is used to indicate a resource unit RU assigned by the AP to at least one of the plurality of STAs, and the STA is any one of the plurality of STAs, and is configured to perform the reception, and the processor is configured to transmit uplink data based on the first field.

[0042] According to the 13th aspect, the present application provides a computer storage medium including program instructions, where the program instructions are used to implement the foregoing resource unit indicating method.

[0043] According to the 14th aspect, the present application provides a computer program product including program instructions, where the program instructions are used to implement the above-mentioned resource unit indication method.

[0044] The present application provides a resource unit indication method, apparatus, and storage medium. The method includes a step of an AP transmitting a physical protocol data unit (PPDU) to a plurality of STAs, where the transmission bandwidth of the PPDU is divided into M sub-blocks, M is an integer greater than 1, where the transmission bandwidth is greater than or equal to 80 MHz, the PPDU includes M first fields, the M first fields have a one-to-one correspondence with the M sub-blocks, the first field is transmitted on the corresponding sub-block, and the first field is used to indicate a resource unit (RU) assigned by the AP to at least one of the plurality of stations (STAs). Therefore, data transmission in a wider bandwidth is supported with less overhead.

Brief Description of the Drawings

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MODE FOR CARRYING OUT THE INVENTION

[0076] Before explaining the technical solution of the present application, first, the technical terms related to the present application will be explained below.

[0077] 1. OFDMA Transmission

[0078] Wireless Local Area Network (WLAN) has been developed from 802.11a / g to 802.11n and 802.11ac, and currently 802.11ax being described. The bandwidth supported by the PPDU of WLAN is shown in Table 1. [Table 1]

Table 1

[0079] The 802.11n standard is called High Throughput (HT), the 802.11ac standard is called Very High Throughput (VHT), and 802.11ax is called High Efficient (HE). Standards prior to HT such as 802.11a / g are collectively called Non-High Throughput (Non-HT).

[0080] Prior to the 802.11ax standard, the 802.11 standard supports Orthogonal Frequency Division Multiplexing (OFDM) transmission, and the entire bandwidth is allocated uniformly to one STA or one STA group for single user (SU) transmission or for downlink multiple user multiple input multiple output (DL MU MIMO) transmission. The 802.11ax standard newly introduces Orthogonal Frequency Division Multiple Access (OFDMA) technology, and the entire bandwidth is divided into one or more resource units (RUs). 802.11ax introduces both DL OFDMA and uplink (UL) OFDMA. 802.11ax has a total of four packet formats. The HE MU PPDU is mainly used to perform DL OFDMA and DL MU MIMO transmissions. Figure 4 is a schematic structural diagram of a High efficient multiple user PPDU (HE MU PPDU). As shown in Figure 4, the PPDU is divided into a preamble part and a data field part, and the preamble part includes two HE signal field parts, HE-SIG-A and HE-SIG-B. As described above, HE-SIG-A is used to indicate the bandwidth of the PPDU, the number of symbols included in HE-SIG-B, the MCS used for HE-SIG-B, and whether HE-SIG-B uses the compression mode. As shown in Figure 1, HE-SIG-B mainly includes a common field and a per-STA field. The common field includes one to N resource unit allocation sub-fields, a central 26-tone resource unit (26-tone RU) indication field that exists when the bandwidth is greater than or equal to 80 MHz, a CRC sub-field used for checking, and a tail sub-field used for periodic decoding.In addition, each STA field has M STA fields (User Fields) numbered from 1 in the resource unit allocation order. Usually, every two of the M STA fields form a group. Except that the last group may have one or two STA fields, each pair of STA fields is followed by one CRC field and one end field.

[0081] 2. Channel and Access

[0082] The 802.11 standard usually uses 20 MHz as the basic bandwidth, and the supported bandwidths are generally exponential integer multiples of 20 MHz (20 MHz, 40 MHz, 80 MHz, and 160 MHz). 20 MHz is used as one channel. For example, FIG. 5 is a schematic diagram of a channel plan in a 160 MHz bandwidth according to an embodiment of the present application. As shown in FIG. 5, the entire 160 MHz channel is divided into a Primary 20 MHz (P20) channel (alternatively referred to as the primary channel), a Secondary 20 MHz (S20) channel, a Secondary 40 MHz (S40) channel, and a Secondary 80 MHz (S80) channel.

[0083] 3. Segment (Seg) Technology in 802.11ax / ac Standard

[0084] In the 802.11ax / ac standard, when the transmission bandwidth of the PPDU is 160 MHz or 80 MHz + 80 MHz, it is divided into 80 MHz segment units to form two segments.

[0085] Furthermore, as described above, currently, HE-SIG-B in 802.11ax provides a resource unit indication method for DL OFDMA and DL MU MIMO. The indication method of the resource unit allocation subfield depends on the Tone Plan in different PPDU bandwidths of 802.11ax.

[0086] FIG. 6 is a schematic diagram of a 20 MHz tone plan and RU plan according to an embodiment of the present application. As shown in FIG. 6, when the bandwidth is 20 MHz, the entire bandwidth may include an entire 242-tone RU, or may include various combinations of 26-tone RUs, 52-tone RUs, and 106-tone RUs. Some guard tones, empty tones (the tone marked 1 in the figure is an empty tone, and 1 indicates that the number of empty tones is 1), or direct current (DC) tones are included in addition to the RUs used to transmit data.

[0087] FIG. 7 is a schematic diagram of a 40 MHz tone plan and RU plan according to an embodiment of the present application. As shown in FIG. 7, when the bandwidth is 40 MHz, the entire bandwidth corresponds approximately to a replication of the 20 MHz tone plan, and the entire bandwidth may include an entire 484-tone RU, or may include various combinations of 26-tone RUs, 52-tone RUs, 106-tone RUs, and 242-tone RUs.

[0088] As described above, FIG. 2 shows an 80 MHz tone plan and RU plan. As shown in FIG. 2, when the bandwidth is 80 MHz, the entire bandwidth includes four resource units in a 242-tone RU unit. In particular, a central 26-tone RU including two 13-tone sub-units further exists at the center of the entire bandwidth. The entire bandwidth may include an entire 996-tone RU, or may include various combinations of 26-tone RUs, 52-tone RUs, 106-tone RUs, 242-tone RUs, and 484-tone RUs.

[0089] When the bandwidth is 160 MHz or 80 MHz + 80 MHz, the entire bandwidth may be regarded as a duplication of two 80 MHz tone plans, the entire bandwidth may include one entire 2 * 996 - tone RU, or may include various combinations of 26 - tone RUs, 52 - tone RUs, 106 - tone RUs, 242 - tone RUs, 484 - tone RUs, and 996 - tone RUs.

[0090] In the various tone plans described above, in the unit of the 242 - tone RU, in the cases of FIG. 2, FIG. 6, or FIG. 7, the left - most side may be regarded as the lowest frequency, and the right - most side may be regarded as the highest frequency. The 242 - tone RU can be numbered from left to right.

[0091] As described above, 802.11ax introduces the concept of a content channel CC. FIG. 8 is a schematic diagram of the indication of the HE - SIG - B signal in a 20 - MHz PPDU bandwidth according to an embodiment of the present application. As shown in FIG. 8, when the PPDU bandwidth is only 20 MHz, HE - SIG - B includes only one CC, and the CC includes one resource unit allocation sub - field used to indicate the resource unit allocation indication within the range of the data part of a 242 - tone RU. The resource unit allocation sub - field is 8 bits, and the combination method of all possible arrangements of resource units in the 242 - tone RU is indicated by indexing. In addition, for an RU with a size greater than or equal to 106 tones, the number of users (i.e., the number of STAs) performing SU / MU - MIMO transmission in the RU is also indicated by indexing. The index of the resource unit allocation sub - field is shown in Table 2. [Table 2]

Table 2

Table 3

Table 4

[0092] As shown in Table 2, the first column indicates the 8-bit index of the resource unit allocation subfield, the middle columns #1 to #9 indicate different combinations of resource unit arrangements, where the numbers in the table indicate the number of tones included in the resource unit. For example, the index 00111y2y1y0 indicates that the entire range of the 242-tone RU is divided into a total of 4 RUs, namely a 52-tone RU, a 52-tone RU, a 26-tone RU, and a 106-tone RU. In addition, the third column indicates the number of entries for which the same resource unit is allocated. The number of entries is used to indicate the number of users included in the 106-tone RU. For example, when indicating resource unit allocation, y2y1y0 is further used to indicate the number of users included in the 106-tone RU corresponding to 1 to 8 users (i.e., stations), so the number of entries corresponding to 00010y2y1y0 is 8. Each value of y2y1y0 can be 0 or 1.

[0093] In addition, when the PPDU bandwidth is greater than 20 MHz, the resource unit allocation subfield can further indicate cases of resource units larger than the 242-tone RU, such as a 484-tone RU or a 996-tone RU, where a resource unit larger than the 242-tone RU indicates that a larger RU resource unit including the 242-tone RU where the STA is located is allocated to the STA.

[0094] Furthermore, the station information of the STAs allocated within the 242-tone RU range is indicated in the field for each STA in the resource allocation order.

[0095] FIG. 9 is a schematic diagram of the indication of the HE-SIG-B signal in the 40 MHz PPDU bandwidth according to an embodiment of the present application. As shown in FIG. 9, when the PPDU bandwidth is 40 MHz, there are two HE-SIG-B content channels, CC1 and CC2. The first HE-SIG-B channel CC1 includes a resource unit allocation subfield within the range of the first 242-tone RU and a field for each corresponding STA. The second HE-SIG-B channel CC2 includes a resource unit allocation subfield within the range of the second 242-tone RU and a field for each corresponding STA.

[0096] FIG. 3 shows the indication of the HE-SIG-B signal in the 80 MHz PPDU bandwidth. As shown in FIG. 3, when the PPDU bandwidth is 80 MHz, there are two additional CCs, for a total of four channels. Thus, the resource unit allocation information is overall indicated for the four channels based on the structure of CC1, CC2, CC1, CC2 in ascending order of frequency. CC1 includes a resource unit allocation subfield within the range of the first and third 242-tone RUs and a field for each corresponding STA within that range. CC2 includes a resource unit subfield within the range of the second and fourth 242-tone RUs and a field for each corresponding STA within that range. In addition, the indication of the central 26-tone RU in 80 MHz is held in each of the two CCs and indicates whether the resource unit is used to transmit data.

[0097] FIG. 10 is a schematic diagram of the indication of the HE-SIG-B signal in a 160 MHz PPDU bandwidth according to an embodiment of the present application. As shown in FIG. 10, when the PPDU bandwidth is 160 MHz, there are two additional CCs, and a total of eight channels exist. Therefore, the resource unit allocation information is overall indicated for the eight channels based on the structure of CC1, CC2, CC1, CC2, CC1, CC2, CC1, CC2 in ascending order of frequency. CC1 includes a resource unit allocation subfield within the range of the first, third, fifth, and seventh 242-tone RUs and a per-STA field corresponding within the range. CC2 includes a resource unit subfield within the range of the second, fourth, sixth, and eighth 242-tone RUs and a per-STA field corresponding within the range. In addition, the two 80 MHz central 26-tone RU indications of 160 MHz are held for each of the two CCs and indicate whether the resource unit is used to transmit data.

[0098] In addition, in the case of MU-MIMO in the full bandwidth mode, 802.11ax indicates in HE-SIG-A that the HE-SIG-B is in the compression mode and the number of users performing the full bandwidth MU-MIMO transmission. In this case, the HE-SIG-B does not have a common field and directly indicates the per-STA field.

[0099] As described above, in the prior art, resource unit indication in the case of 20 MHz to 160 MHz is implemented, but this results in a relatively large overhead. For example, when the PPDU bandwidth is 80 MHz, each CC includes two resource unit allocation indication sub-fields, including the fields for each user's STA in two 242-tone RUs. As a result, the overhead becomes relatively large. In another example, when the PPDU bandwidth is 160 MHz, each CC includes four resource unit allocation sub-fields, including the fields for each user's STA in four 242-tone RUs. As a result, the overhead becomes relatively large. When a 320 MHz PPDU bandwidth is considered in the next-generation standard, the overhead doubles further. Therefore, how to support OFDMA or MU-MIMO transmission in a wider bandwidth (e.g., 320 MHz) with less overhead is an issue that needs to be considered in this application.

[0100] The technical solution in the embodiments of the present application may be applied to a communication system supporting the next-generation standard of 802.11ax or a further next-generation standard in a wireless local area network WLAN, or may be applied to another communication system supporting OFDM transmission in a large bandwidth. It should be noted that in the present application, for ease of explanation, the next-generation standard of 802.11ax is referred to as Extremely High Throughput (EHT). It will be understood that the next-generation standard of 802.11ax may have another name such as Extreme Throughput (XT) or Ultra High Throughput (UHT). This is not limited in the present application. For ease of explanation, a WLAN system is used as an example for the explanation in the embodiments of the present application. FIG. 11 is a schematic diagram of an application scenario according to an embodiment of the present application. As shown in FIG. 11, the application scenario may include one or more access points AP and one or more stations STA. The access point AP may be a device configured to communicate with the station. The access point may be any device having a wireless transceiver function, or a chip that can be disposed in the device.The device includes, but is not limited to, evolved NodeB (eNB), radio network controller (RNC), NodeB (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB or home NodeB, HNB), baseband Unit (BBU), access point (AP) in a wireless fidelity (Wi-Fi (registered trademark)) system, wireless relay node, wireless backhaul node, transmission point (TP), and transmission and reception point (TRP). Alternatively, the device can be a base station that supports the 5G protocol. The station STA can be a user equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile console, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. Alternatively, the station can be a mobile phone, cordless phone set, session initiation protocol (SIP) phone, station in a wireless local area network, in-vehicle device, wearable device, terminal device in a future 5G network, or terminal device in a future public land mobile network (PLMN).

[0101] The technical solution in the present application is applicable to data communication between an AP and one or more STAs, and is also applicable to communication between an AP and multiple APs, and further applicable to communication between an STA and multiple STAs. Hereinafter, data communication between an AP and multiple STAs is used as an example to explain the technical solution in the present application.

[0102] The main procedures of the technical solution in the present application are as follows: The AP transmits a PPDU to the STA. The transmission bandwidth of the PPDU is divided into M sub-blocks. The PPDU includes an EHT-SIG-B corresponding to each sub-block (i.e., the first field in Embodiment 1 and Embodiment 2 below. Alternatively, the EHT-SIG-B includes the first field when the sub-block includes multiple CCs). Optionally, the PPDU further includes an EHT-SIG-A corresponding to each sub-block (i.e., the second field in Embodiment 1 and Embodiment 2. Alternatively, the EHT-SIG-A includes the second field when the sub-block includes multiple CCs). The AP uses the first field in each sub-block to indicate the RU allocation status of the STA in the sub-block corresponding to the first field. When the size of the RU indicated by the first field is smaller than or equal to the largest RU included in the sub-block corresponding to the first field, the RU indicated by the first field is allocated only to the STA in the sub-block to which the STA belongs. When the size of the RU indicated by the first field is larger than the largest RU included in the sub-block corresponding to the first field, the RU indicated by the first field is a combination of sub-blocks or a combination of segments.

[0103] After receiving the PPDU, the STA obtains the first field of the sub-block to which the STA belongs and uses the first field to determine the RU allocated to the STA. The RU is a sub-block corresponding to the first field, a combination of sub-blocks, or a combination of segments. [Embodiment 1]

[0104] Specifically, FIG. 12 is a flowchart of a resource unit indication method according to an embodiment of the present application. As shown in FIG. 12, the method includes the following steps.

[0105] Step S1201: The AP generates a PPDU, where the transmission bandwidth of the PPDU is divided into M sub-blocks, M is an integer greater than 1, the transmission bandwidth is greater than or equal to 80 MHz, the PPDU includes M first fields, the M first fields have a one-to-one correspondence with the M sub-blocks, the first field is transmitted on the corresponding sub-block, and the first field is used to indicate the RU assigned by the AP to at least one of the plurality of STAs.

[0106] Step S1202: The AP transmits the PPDU to a plurality of STAs.

[0107] The station receiving the PPDU can analyze the data field of the PPDU based on the first field. Specifically, the station receiving the PPDU can determine the specific RU on which the STA's data is carried based on the first field. Further, the STA can receive and analyze the STA's data in the corresponding RU.

[0108] Optionally, in an 80 MHz sub-block unit, the sub-block is understood as "Segments (Seg)" in the 802.11ax / ac standard. In a sub-block unit with a bandwidth of 160 MHz or wider, the sub-block is a part, and the sub-block includes at least one segment.

[0109] Optionally, in this embodiment of the present application, the PPDU includes a preamble part and a data field part. The preamble part includes M first fields (the first field may be understood as the EHT-SIG-B of each sub-block, or may be understood as the resource unit allocation sub-field in the EHT-SIG-B. For convenience, the first field is regarded as the resource unit allocation sub-field in the EHT-SIG-B hereinafter, and the resource unit indication method will be described). Optionally, the PPDU may further include M second fields (the second field may be understood as the EHT-SIG-A).

[0110] Furthermore, as described above, the first field is used by the AP to indicate the RU assigned to at least one of the plurality of STAs. If the RU indicated by the first field is less than or equal to the maximum RU included in the sub-block corresponding to the first field, the RU indicated by the first field is located in the sub-block corresponding to the first field. If the RU indicated by the first field is greater than the maximum RU included in the sub-block corresponding to the first field, the RU indicated by the first field is a combination of sub-blocks including a plurality of sub-blocks, or the RU indicated by the first field is a combination of segments including all or part of the segments included in the plurality of sub-blocks. For example, if STA1 and STA2 correspond to sub-block 1 and the RUs assigned to STA1 and STA2 are less than the maximum RU in sub-block 1, the AP uses the first field corresponding to sub-block 1 to indicate that the RUs assigned to STA1 and STA2 are the first 242-tone RUs in sub-block 1. In another example, if STA3 and STA4 correspond to sub-block 2 and the RUs assigned to STA3 and STA4 are greater than the maximum RU in sub-block 2, the AP uses the first field corresponding to sub-block 2 to indicate that the RUs assigned to STA3 and STA4 are the combined RUs of sub-blocks including sub-block 1 and sub-block 2.

[0111] Hereinafter, the resource unit indication method will be further described by using the following Example 1 and Example 2.

[0112] Example 1

[0113] Hereinafter, the resource unit indication method will be described by using an example in which the transmission bandwidth of the PPDU is 320 MHz and M = 4 (in an 80 MHz sub-block unit, the entire bandwidth is divided into four sub-blocks).

[0114] FIG. 13 is a schematic diagram of a 320 MHz bandwidth in an 80 MHz sub-block unit according to an embodiment of the present application. As shown in FIG. 13, the 320 MHz bandwidth is divided into four sub-blocks: Part1, Part2, Part3, and Part4. In each sub-block, the AP configures the P20, S20, and S40 channels corresponding to the STAs in the sub-block to which the STA belongs. The entire bandwidth can be regarded as having a plurality of (temporary) P20 channels.

[0115] As described above, the first field is used by the AP to indicate the RUs assigned to at least one of the plurality of STAs. Specifically, FIG. 14 is a schematic diagram of EHT-SIG-B in an 80 MHz sub-block unit (including two CCs) according to an embodiment of the present application. As shown in FIG. 14, each sub-block includes four channels and two CCs. In Part1, CC11 carries the following information: the resource unit allocation sub-field (each corresponding first field for Part1) within the range of the first 242-tone RU and the third 242-tone RU of Part1, and the per-STA information of the STAs assigned to the corresponding 242-tone RU range. CC12 carries the following information: the resource unit allocation sub-field (each corresponding first field for Part1) within the range of the second 242-tone RU and the fourth 242-tone RU of Part1, and the per-STA information of the STAs assigned to the corresponding 242-tone RU range. In Part2, CC21 carries the following information: the resource unit allocation sub-field within the range of the fifth 242-tone RU and the seventh 242-tone RU of Part2 (the first field corresponding to Part2), and the per-STA information of the STAs assigned to the corresponding 242-tone RU range. CC22 carries the following information: the resource unit allocation sub-field within the range of the sixth 242-tone RU and the eighth 242-tone RU of Seg2 (the first field corresponding to Part2), and the per-STA information of the STAs assigned to the corresponding 242-tone RU range. In Part3, CC31 carries the following information: the resource unit allocation sub-field within the range of the ninth 242-tone RU and the eleventh 242-tone RU of Seg3 (the first field corresponding to Part3), and the per-STA information of the STAs assigned to the corresponding 242-tone RU range.CC32 carries the following information: the resource unit allocation subfield within the range of the 10th 242-tone RU and the 12th 242-tone RU of Seg3 (the first field corresponding to Part3), and the per-STA information of the STAs assigned to the corresponding 242-tone RU range. In Part4, CC41 carries the following information: the resource unit allocation subfield within the range of the 13th 242-tone RU and the 15th 242-tone RU of Seg3 (the first field corresponding to Part4), and the per-STA information of the STAs assigned to the corresponding 242-tone RU range. CC42 carries the following information: the resource unit allocation subfield within the range of the 14th 242-tone RU and the 16th 242-tone RU of Seg4 (the first field corresponding to Part4), and the per-STA information of the STAs assigned to the corresponding 242-tone RU range.

[0116] Note that the 1st 242-tone RU to the 16th 242-tone RU are described with respect to the entire bandwidth of the PPDU.

[0117] Note that FIG. 14 includes two CCs and actually includes four CCs that can be alternatively used. Specifically, FIG. 15 is a schematic diagram of EHT-SIG-B in an 80 MHz sub-block unit (including four CCs) according to an embodiment of the present application. As shown in FIG. 15, in this case, each CC needs to indicate a resource unit allocation subfield within the range of only one 242-tone RU in order to further reduce overhead.

[0118] In the case of the resource unit allocation subfield, when the size of the RU assigned to the STA is less than or equal to the 996-tone RU (i.e., the maximum RU in the 80 MHz sub-block unit), the resource unit subfield shown in Table 2 can be used to indicate the resource.

[0119] If the size of the RU assigned to the STA is larger than the 996-tone RU, the resources can be indicated in any of the following ways:

[0120] In the first method, the combined RU of some or all sub-blocks is indicated by using the Reserved field.

[0121] Specifically, when the RU indicated by the resource unit allocation sub-field is a combination of sub-blocks, the correspondence between the resource unit allocation sub-field and the combined RU of sub-blocks includes at least one entry shown in Table 3: [Table 3]

Table 5

[0122] Part1, Part2, Part3, and Part4 are four different sub-blocks.

[0123] Optionally, the lengths of the first value, the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, the eighth value, the ninth value, the tenth value, and the eleventh value are all 8 bits. In other words, the resource unit allocation sub-field can be 8 bits.

[0124] Note that the mapping relationship between the resource unit allocation subfield and the combination of sub-blocks can change and is not limited to the examples listed in this embodiment of the present application. For example, the mapping relationship can alternatively be as follows: When the resource unit allocation subfield is the first value, the combination of sub-blocks is the combination of Part1 and Part3. When the resource unit allocation subfield is the second value, the combination of sub-blocks is the combination of Part1 and Part2. It will be understood that other alternative examples are also included in the protection scope of the embodiments of the present application. The sub-block identifiers used in the table are the logical identifiers of the sub-blocks. Usually, the sub-block identifier 1 (Part1) indicates the lowest frequency 80 MHz channel including the primary 20 MHz channel, the sub-block identifier 2 (Part2) indicates the second lowest frequency 80 MHz channel adjacent to Part1, the sub-block identifier 3 (Part3) indicates the higher frequency 80 MHz channel adjacent to Part2, and the sub-block identifier 4 (Part4) indicates the highest frequency 80 MHz channel adjacent to Part3. The foregoing matters explain the general mapping relationship between the sub-block identifier and the channel. There is also another mapping relationship between the sub-block identifier and the channel. This is not limited in the present application.

[0125] In addition, the foregoing table lists examples of all possible combinations of the four sub-blocks. In actual applications, only some of the combination examples in the foregoing table may be included. In one example, the resource unit allocation subfield can be a combination of sub-blocks with a continuous frequency region. For example, only 6 of the 11 foregoing combination examples may be included: Part1+Part2, Part2+Part3, Part3+Part4, Part1+Part2+Part3, Part2+Part3+Part4, and Part1+Part2+Part3+Part4.

[0126] For example, an example of the correspondence between a resource unit allocation subfield and a combination RU of an indicated sub-block is shown in Table 4. [Table 4]

Table 6

[0127] For example, when a combination Part1 + Part2 of sub-blocks is allocated to at least one STA and its size is 2 * 996 tones, the value of the resource unit allocation subfield can be 01110100.

[0128] As described above, the resource unit allocation subfield is used to indicate the RU allocated to at least one STA. Further, the EHT-SIG-B may include indication information, and the indication information is used to indicate the number of at least one STA, that is, the number of STAs that transmit data in the RU indicated by the resource unit allocation subfield. Furthermore, when the RU indicated by the resource unit allocation subfield is a combination of sub-blocks, the indication method of the indication information includes the following two cases:

[0129] In the first case, for each sub-block, all CCS included in the sub-block hold the same indication information, and the indication information is used to indicate the number of STAs that transmit data in the combination RU of sub-blocks indicated by the resource unit allocation subfield.

[0130] In the second case, for a sub-block, the sub-block carries a plurality of CCs, all CCs hold different indication information, and the number of STAs indicated by the indication information of each CC is a part of the number of STAs transmitting data in the combined RU of the sub-block. Each CC includes the user information fields of this part of the STAs. The sub-block includes CC1 and CC2. CC1 may hold the first indication information, CC2 may hold the second indication information, and it is assumed that the first indication information and the second indication information together indicate the number of STAs transmitting data in the combined RU of the sub-block indicated by the resource unit allocation sub-field. For example, the number may be the sum of the number of STAs indicated by the first indication information and the number of STAs indicated by the second indication information. For example, 5 STAs perform transmission in the RU. CC1 includes the user information fields of 3 out of the 5 STAs, the number of STAs indicated by the first indication information is 3, CC2 includes the user information fields of 2 STAs other than the 3 STAs, and the number of STAs indicated by the second indication information is 2. Therefore, the number of STAs indicated together by the first indication information and the second indication information is 5.

[0131] An example where the RU indicated by the resource unit allocation sub-field includes a combination of Part1 and Part2 (Part1 + Part2) is used for the description. FIG. 16 is a schematic diagram of a sub-block combination-based EHT-SIG-B according to an embodiment of the present application. As shown in FIG. 16, the EHT-SIG-B includes a resource unit sub-field used to indicate the combination Part1 + Part2 of the sub-blocks, as well as indication information, and the indication information is used to indicate the number of STAs transmitting data by using Part1 + Part2. The indication method of the indication information can be the above two methods. Details are not described again here.

[0132] Since the EHT-SIG-B includes a resource unit subfield used to indicate the combination of sub-blocks Part1+Part2, note that the resource unit allocation subfields for the second, third, and fourth 242-tone RUs (indicated by the dashed boxes in the figure) do not need to repeatedly indicate the combination of sub-blocks Part1+Part2. Indeed, to ensure a consistent field format, the resource unit allocation subfields for the second, third, and fourth 242-tone RUs may alternatively repeatedly indicate the combination of sub-blocks Part1+Part2. In other words, the two resource unit subfields on CC11 have the same value, and the RUs indicated by the two resource unit subfields are both Part1+Part2. This is not limited in this application. In this case, there is no central 26-tone RU, and thus it can be set to 0 to indicate that no 26-tone RU is individually allocated to any STA.

[0133] Based on this, in the case of a 320 MHz transmission bandwidth, each CC in the existing 802.11ax includes a resource unit allocation subfield within the range of 8 242-tone RUs. However, in the first method of Example 1, the AP indicates resources based on sub-blocks, and each CC includes a resource unit allocation subfield within the range of only 2 242-tone RUs. Therefore, the resource overhead of the indication method provided in this application is reduced to one-fourth compared to the resource overhead of the indication method in 802.11ax.

[0134] In the second method, in addition to the combination RU of sub-blocks, the resource unit allocation sub-field is used to indicate the number of STAs (number of users) that transmit data in the combination RU of sub-blocks. The correspondence between the resource unit allocation sub-field, the combination RU of sub-blocks, and the number of STAs that transmit data in the combination of sub-blocks includes at least one of the following entries, specifically as shown in Table 5. [Table 5]

Table 7

Table 8

Table 9

[0135] Part1, Part2, Part3, and Part4 are four different sub-blocks.

[0136] Optionally, the lengths from the first value to the 88th value are all 9 bits. In other words, the resource unit allocation sub-field can be 9 bits.

[0137] Optionally, the values of the first number, the second number, the third number, the fourth number, the fifth number, the sixth number, the seventh number, and the eighth number in Table 5 are integers greater than or equal to 1 and less than or equal to 8. For example, the first number can be 1. The mapping relationships shown in Table 5 only show all the corresponding relationships.

[0138] Furthermore, the mapping relationship between the combination of the resource unit allocation subfield and sub-blocks and the number of STAs can change and is not limited to the cases listed in this embodiment of the present application. For example, the mapping relationship can alternatively be as follows: when the resource unit allocation subfield is the first value, the combination of sub-blocks is the combination of Part1 and Part3, and the number of users is the first number. When the resource unit allocation subfield is the second value, the combination of sub-blocks is the combination of Part1 and Part2, and the number of users is the first number. It will be understood that other alternative cases are also included in the protection scope of the embodiments of the present application. The sub-block identifiers used in the table are the logical identifiers of the sub-blocks. Usually, the sub-block identifier 1 (Part1) indicates the lowest frequency 80 MHz channel including the primary 20 MHz channel, the sub-block identifier 2 (Part2) indicates the second lowest frequency 80 MHz channel adjacent to Part1, the sub-block identifier 3 (Part3) indicates the higher frequency 80 MHz channel adjacent to Part2, and the sub-block identifier 4 (Part4) indicates the highest frequency 80 MHz channel adjacent to Part3. The foregoing matters explain the general mapping relationship between the sub-block identifier and the channel. Another mapping relationship between the sub-block identifier and the channel also exists. This is not limited in the present application.

[0139] In addition, the foregoing table lists examples of all possible combinations of the four sub-blocks. In actual applications, only some of the examples of all possible combinations in the foregoing table may be included. In one example, the resource unit allocation subfield can be a combination of sub-blocks with a continuous frequency domain. For example, only 6 of the 11 foregoing combination examples may be included: Part1+Part2, Part2+Part3, Part3+Part4, Part1+Part2+Part3, Part2+Part3+Part4, and Part1+Part2+Part3+Part4.

[0140] For example, Table 6 shows an example of the correspondence between the value of the resource unit allocation subfield and the combination RU of the indicated sub-blocks and the number of users. [Table 6] [Table 10] [Table 11]

[0141] x4x3x2x1x0 is a combination of arrangements of 0 and 1, and the value of x4x3x2x1x0 can be any of 32 combinations (from 00000 to 11111). For example, x4x3x2x1x0 is 0000. Similarly, x7x6x5x4x3x2x1x0 is a combination of arrangements of 0 and 1, and the value of x7x6x5x4x3x2x1x0 can be any of 256 combinations (from 00000000 to 11111111). For example, x7x6x5x4x3x2x1x0 is 00000000.

[0142] When an 8-bit indication is still being used, it should be noted that the reserved entry is not sufficient to indicate all cases, and thus some of the aforementioned cases may be indicated. In another embodiment, the resource unit allocation subfield can be extended from 8 bits to 9 bits (the 0 or 1 in the parentheses in Table 6 indicates that 1 bit has been added). When the resource unit allocation subfield is 9 bits, the resource unit allocation subfield can correspond to all the correspondences listed in Table 6. Further, the number of users transmitting data in the combination of sub-blocks can be extended to be greater than 8 (for example, 16).

[0143] Optionally, the combination of sub - blocks includes the sub - block corresponding to the resource unit allocation sub - field. For example, when the sub - block corresponding to the resource unit allocation sub - field is Part1, the combination of sub - blocks can be Part1 + Part2, Part1 + Part3, Part1 + Part4, or Part1 + Part2 + Part3, etc. Therefore, different resource indication methods can be designed for different sub - blocks. As shown in Table 7, the combination of sub - blocks indicated by the resource unit allocation sub - field includes the sub - block corresponding to the resource unit allocation sub - field, and as a result, the resource overhead can be further reduced. [Table 7]

Table 12

Table 13

[0144] Part1, Part2, Part3 and Part4 are four different sub - blocks.

[0145] Optionally, the lengths of the first value, the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, the eighth value, the ninth value, and the tenth value are all 9 bits. In other words, the resource unit allocation sub - field can be 9 bits.

[0146] Optionally, the values of the first number, the second number, the third number, the fourth number, the fifth number, the sixth number, the seventh number, the eighth number, the ninth number and the tenth number in Table 7 are integers greater than or equal to 1 and less than or equal to 8. For example, the first number can be 1. The mapping relationship shown in Table 7 shows only some corresponding relationships. For example, Table 7 can be further extended. For example, Table 7 includes an eleventh value, and the combination of the corresponding sub - blocks and the number of users is Part1 + Part2 and the eleventh number, and the eleventh number can be 2.

[0147] For example, Table 8 shows an example of the correspondence between the value of the resource unit allocation subfield and the combination of the number of RUs and STAs of the indicated sub-blocks. [Table 8]

Table 14

Table 15

[0148] Based on this, in the case of a transmission bandwidth of 320 MHz, each CC in the existing 802.11ax includes a resource unit allocation subfield within the range of 8 242-tone RUs. However, in the second method of Example 1, the AP indicates resources based on sub-blocks, and each CC includes a resource unit allocation subfield within the range of only 2 242-tone RUs. Therefore, the resource overhead of the indication method provided in the present application is reduced to one-fourth compared to the resource overhead of the indication method in 802.11ax. Furthermore, the combination of sub-blocks indicated by the resource unit allocation subfield includes the sub-blocks corresponding to the resource unit allocation subfield, and as a result, the resource overhead can be further reduced.

[0149] In the third method, the combination of sub-blocks is indicated in the compression mode. Specifically, the PPDU includes an EHT-SIG-A corresponding to each sub-block and an EHT-SIG-B corresponding to each sub-block. The EHT-SIG-A holds indication information indicating that the sub-block to which the EHT-SIG-A belongs uses the compression mode. The EHT-SIG-B includes a resource unit allocation sub-field, and the resource unit allocation sub-field is used to indicate the combination of sub-blocks. Optionally, for example, FIG. 17 is a schematic diagram of an EHT-SIG-B based on a combination of sub-blocks according to an embodiment of the present application. As shown in FIG. 17, the EHT-SIG-B includes a resource unit allocation sub-field in each of CC11 and CC12, and the resource unit allocation sub-field is used to indicate the combination of sub-blocks. Further, the EHT-SIG-B further includes indication information in CC11 and CC12, and the indication information is used to indicate the number of STAs transmitting data in the combination of sub-blocks. Alternatively, the EHT-SIG-B includes first indication information and second indication information in CC11 and CC12 respectively, and the first indication information and the second indication information are used to jointly indicate the number of STAs transmitting data in the combination of sub-blocks.

[0150] Furthermore, the resource unit allocation sub-field is shown in Table 9 and indicates some or all possible combinations of sub-blocks. Optionally, indication information may be further included. In addition, the indication information may be alternatively combined with the resource unit allocation sub-field to implement a uniform indication. The entire sub-block indicates that the entire sub-block allocated to the STA is allocated to the STA as one RU. [Table 9]

Table 16

[0151] Part1, Part2, Part3, and Part4 are four different sub - blocks.

[0152] Optionally, the lengths of the first value, the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, the eighth value, the ninth value, and the twelfth value are all 8 bits. In other words, the resource unit allocation sub - field can be 8 bits.

[0153] For example, an example of the correspondence between the value of the resource unit allocation sub - field and the combination RU of the indicated sub - blocks is shown in Table 10. [Table 10] [Table 17]

[0154] In the third method of Example 1, a compression mode indication method is used, and as a result, the resource overhead can be reduced. Further, the indication method for the combination of sub - blocks is designed in this method.

[0155] Example 2: The resource unit indication method is illustrated by using an example where the transmission bandwidth of the PPDU is 320 MHz and M = 2 (the entire bandwidth is divided into two sub - blocks in sub - block units of 160 MHz).

[0156] FIG. 18 is a schematic diagram of a 320 MHz bandwidth in a 160 MHz sub-block unit according to an embodiment of the present application. As shown in FIG. 18, the 320 MHz bandwidth is divided into two sub-blocks, Part1 and Part2. Each sub-block includes two segments (of an 80 MHz segment unit). In each sub-block, the corresponding P20, S20, S40, and S80 channels are configured for the STA in the sub-block to which the STA belongs. The entire bandwidth can be regarded as having two (temporary) P20 channels. Each sub-block includes two CCs or four CCs. For example, each sub-block in FIGS. 19A, 19B, and 19C includes two CCs, and each sub-block in FIGS. 20A and 20B includes four CCs. FIGS. 19A, 19B, and 19C are schematic diagrams of EHT-SIG-B in a 160 MHz sub-block unit (two CCs) according to an embodiment of the present application. FIGS. 20A and 20B are schematic diagrams of EHT-SIG-B in a 160 MHz sub-block unit (four CCs) according to an embodiment of the present application.

[0157] Regarding the resource unit allocation subfield, when the size of the RU allocated to the STA is less than or equal to 2 * 996 tones (i.e., the maximum RU in a 160 MHz sub-block unit), the corresponding entry shown in Table 2 is used to indicate the resource unit, and the indication of the 2 * 996 tone RU needs to be supplemented. For details, refer to Table 11. [Table 11]

Table 18

[0158] When the size of the RU allocated to the STA is larger than the 2 * 996 tone RU, the resource can be indicated in any of the following ways:

[0159] In the first method, combinations of some or all segments are indicated by using the Reserved field. Specifically, when the RUs indicated by the resource unit allocation subfield are combinations of segments, the correspondence between the resource unit allocation subfield and the combined RUs of segments includes at least one entry shown in Table 12: [Table 12] [Table 19]

[0160] Seg1, Seg2, Seg3, and Seg4 are four different segments.

[0161] Optionally, the lengths of the first value, the second value, the third value, the fourth value, and the fifth value are all 8 bits. In other words, the resource unit allocation subfield can be 8 bits.

[0162] Note that the mapping relationship between the resource unit allocation subfield and the combination of segments can change and is not limited to the cases listed in this embodiment of the present application. For example, the mapping relationship can alternatively be as follows: When the resource unit allocation subfield is the first value, the combination of segments is the combination of Seg1, Seg2, and Seg4. When the resource unit allocation subfield is the second value, the combination of segments is the combination of Seg1, Seg2, and Seg3. It will be understood that other alternative cases are also included in the protection scope of the embodiments of the present application. The segment identifiers used in the table are the logical identifiers of the segments. Usually, segment identifier 1 (Seg1) indicates the lowest frequency 80 MHz channel including the primary 20 MHz channel, segment identifier 2 (Seg2) indicates the second lowest frequency 80 MHz channel adjacent to Seg1, segment identifier 3 (Seg3) indicates the higher frequency 80 MHz channel adjacent to Seg2, and segment identifier 4 (Seg4) indicates the highest frequency 80 MHz channel adjacent to Seg3. The foregoing matters explain the general mapping relationship between the segment identifier and the channel. There is also another mapping relationship between the segment identifier and the channel. This is not limited in the present application.

[0163] In addition, the foregoing table lists examples of all possible combinations of the four segments. In actual applications, only some of the examples of all possible combinations in the foregoing table may be included. In one example, the resource unit allocation subfield can be a combination of segments with a continuous frequency region. For example, only two of the five foregoing combination examples may be included, and the two are Seg1 + Seg2 + Seg3 and Seg1 + Seg2 + Seg4.

[0164] For example, an example of the correspondence between the value of the resource unit allocation subfield and the combination of segments RU indicated is shown in Table 13. [Table 13]

Table 20

[0165] As described above, the resource unit allocation subfield is used to indicate the RUs allocated to at least one STA. Further, the EHT-SIG-B may include indication information, and the indication information is used to indicate the number of at least one STA, that is, the number of STAs (number of users) transmitting data in the RUs indicated by the resource unit allocation subfield. Still further, when the RUs indicated by the resource unit allocation subfield are a combination of segments, the holding method of the indication information includes the following two cases:

[0166] In the first case, for each segment, each CC included in the segment holds the same indication information, and the indication information is used to indicate the number of STAs transmitting data in the combined RU of segments indicated by the resource unit allocation subfield.

[0167] In the second case, for the segment, the segment includes CC1 and CC2, CC1 may hold the first indication information, CC2 may hold the second indication information, and it is assumed that the first indication information and the second indication information together indicate the number of STAs transmitting data in the combined RU of segments indicated by the resource unit allocation subfield. For example, the number may be the sum of the number of STAs indicated by the first indication information and the number of STAs indicated by the second indication information.

[0168] An example where the RU indicated by the resource unit allocation subfield includes a combination of Seg1+Seg2 is used for illustration.

[0169] Figure 21 is a schematic diagram of a segment combination-based EHT-SIG-B according to an embodiment of the present application. As shown in Figure 21, EHT-SIG-B includes a resource unit allocation subfield used to indicate a segment combination Seg1+Seg2, and indication information, and the indication information is used to indicate the number of STAs that transmit data by using Seg1+Seg2. Since EHT-SIG-B includes a resource unit subfield used to indicate a segment combination Seg1+Seg2, it should be noted that the resource unit allocation subfields of the second, third, fourth, fifth, sixth, seventh, and eighth 242-tone RUs (indicated by the dashed boxes in the figure) do not need to repeatedly indicate the segment combination Seg1+Seg2. Indeed, to ensure a consistent field format, the resource unit allocation subfields of the second, third, fourth, fifth, sixth, seventh, and eighth 242-tone RUs may alternatively repeatedly indicate the segment combination Seg1+Seg2. This is not limited in the present application. In this case, there is no central 26-tone RU, and thus it may be set to 0 to indicate that the 26-tone RU is not individually allocated to any STA.

[0170] Based on this, in the case of a 320 MHz transmission bandwidth, each CC in the existing 802.11ax includes a resource unit allocation subfield within the range of 8 242-tone RUs. However, in the first method of Example 2, the AP indicates resources based on segments, and each CC includes a resource unit allocation subfield within the range of only 4 242-tone RUs. Therefore, the resource overhead of the indication method provided in the present application is reduced by half compared to the resource overhead of the indication method in 802.11ax.

[0171] In the second method, in addition to the segment combination RU, the resource unit allocation subfield is used to indicate the number of STAs that transmit data in the segment combination RU. The correspondence between the resource unit allocation subfield, the segment combination RU, and the number of STAs that transmit data in the segment combination includes at least one of the following entries, specifically shown in Table 14. [Table 14]

Table 21

[0172] Seg1, Seg2, Seg3, and Seg4 are four different segments.

[0173] Optionally, the lengths of the first value, the second value, the third value, the fourth value, and the fifth value are all 9 bits. In other words, the resource unit allocation subfield can be 9 bits.

[0174] Optionally, the values of the first number, the second number, the third number, the fourth number, and the fifth number in Table 14 are integers greater than or equal to 1 and less than or equal to 8. For example, the first number can be 1. The mapping relationship shown in Table 14 shows only some of the correspondences. For example, Table 14 can be further extended. For example, Table 14 includes a sixth value, and the corresponding segment combination and the number of STAs are Seg1 + Seg2 + Seg3 and the sixth number, and the sixth number can be 2.

[0175] Furthermore, the mapping relationship between the combination of the resource unit allocation subfield and the segments and the number of STAs can change and is not limited to the cases listed in this embodiment of the present application. For example, the mapping relationship can alternatively be as follows: When the resource unit allocation subfield is the first value, the combination of segments is the combination of Seg1, Seg3, and Seg4, and the number of STAs is the seventh number. When the resource unit allocation subfield is the second value, the combination of segments is the combination of Seg1, Seg2, and Seg3, and the number of STAs is the eighth number. It will be understood that other alternative cases are also included in the protection scope of the embodiments of the present application. The segment identifiers used in the table are the logical identifiers of the segments. Usually, segment identifier 1 (Seg1) indicates the lowest frequency 80 MHz channel including the primary 20 MHz channel, segment identifier 2 (Seg2) indicates the second lowest frequency 80 MHz channel adjacent to Seg1, segment identifier 3 (Seg3) indicates the higher frequency 80 MHz channel adjacent to Seg2, and segment identifier 4 (Seg4) indicates the highest frequency 80 MHz channel adjacent to Seg3. The foregoing matters explain the general mapping relationship between the segment identifier and the channel. Another mapping relationship between the segment identifier and the channel also exists. This is not limited in the present application.

[0176] In addition, the foregoing table lists examples of some possible combinations of four segments. In actual applications, only some of all possible combination examples in the foregoing table, or correspondence relationships not shown in Table 14, may be included. In one example, the resource unit allocation subfield can be a combination of segments with a continuous frequency region. For example, only two of the five combination examples described above may be included, and the two are Seg1 + Seg2 + Seg3 and Seg1 + Seg2 + Seg3 + Seg4.

[0177] For example, Table 15 shows an example of the correspondence between the value of the resource unit allocation subfield and the combination of the RU and STA numbers of the indicated segments. [Table 15] [Table 22]

[0178] When an 8-bit indication is still in use, it should be noted that the reserved entry is not sufficient to indicate all cases, and thus only some of the aforementioned cases may be indicated. In another embodiment, the resource unit allocation subfield may be extended from 8 bits to 9 bits (the 0 or 1 in parentheses in Table 15 indicates that 1 bit has been added). When the resource unit allocation subfield is 9 bits, the resource unit allocation subfield may correspond to all the correspondences listed in Table 15. Further, the number of users transmitting data in the segment combination may be extended to be greater than 8 (e.g., 16).

[0179] Optionally, the segment combination includes the segment corresponding to the resource unit allocation subfield. For example, when the segment corresponding to the resource unit allocation subfield is Seg1, the segment combination indicated by the resource unit allocation subfield is not Seg2 + Seg3 + Seg4, and the STA located at Seg4 is not allocated to Seg1 + Seg2 + Seg3. Therefore, different tables may be designed for different segments. As shown in Table 16, the segment combination indicated by the resource unit allocation subfield includes the segment corresponding to the resource unit allocation subfield, and as a result, the resource overhead may be further reduced. [Table 16] [Table 23]

[0180] Seg1, Seg2, Seg3, and Seg4 are four different segments.

[0181] Optionally, the lengths of the first value, the second value, the third value, the fourth value, and the fifth value are all 9 bits. In other words, the resource unit allocation subfield can be 9 bits.

[0182] Optionally, the values of the first number, the second number, the third number, the fourth number, and the fifth number in Table 16 are integers greater than or equal to 1 and less than or equal to 8. For example, the first number can be 1. The mapping relationship shown in Table 16 shows only some of the corresponding relationships. For example, Table 16 can be further extended. For example, Table 16 includes a sixth value, and the combination of the corresponding segments and the number of STAs is Seg1 + Seg2 + Seg3 and the seventh number, and the seventh number can be 2.

[0183] For example, an example of the correspondence between the value of the resource unit allocation subfield and the combination RU of the indicated segments and the number of STAs is shown in Table 17. [Table 17] [Table 24]

[0184] Based on this, in the case of a transmission bandwidth of 320 MHz, each CC in the existing 802.11ax includes a resource unit allocation subfield within the range of 8 242-tone RUs. However, in the second method of Example 2, the AP indicates resources based on segments, and each CC includes a resource unit allocation subfield only within the range of 4 242-tone RUs. Therefore, the resource overhead of the indication method provided in the present application is reduced to half compared to the resource overhead of the indication method in 802.11ax. Furthermore, the combination of segments indicated by the resource unit allocation subfield includes the segments corresponding to the resource unit allocation subfield, and as a result, the resource overhead can be further reduced.

[0185] In the third method, the combination of sub-blocks is indicated in a compression mode. Specifically, the PPDU includes an EHT-SIG-A corresponding to each sub-block and an EHT-SIG-B corresponding to each sub-block. The EHT-SIG-A holds indication information indicating that the sub-block to which the EHT-SIG-A belongs uses the compression mode. The EHT-SIG-B includes a resource unit allocation subfield, and the resource unit allocation subfield is used to indicate the combination of sub-blocks. Optionally, for example, FIG. 22 is a schematic diagram of an EHT-SIG-B based on a combination of segments according to an embodiment of the present application. As shown in FIG. 22, the EHT-SIG-B includes a resource unit allocation subfield in each of CC1 and CC2, and the resource unit allocation subfield is used to indicate the combination of segments. Furthermore, the EHT-SIG-B further includes indication information in CC1 and CC2, and the indication information is used to indicate the number of STAs transmitting data in the combination of segments. Alternatively, the EHT-SIG-B includes first indication information and second indication information in CC1 and CC2 respectively, and the first indication information and the second indication information are used together to indicate the number of STAs transmitting data in the combination of segments.

[0186] Furthermore, the resource unit allocation subfield is shown in Table 18 and indicates some or all possible combinations of segments. Optionally, indication information may be further included. Additionally, the indication information may be alternatively combined with the indication subfield of the segment combination to implement a uniform indication. The entire segment indicates that the entire segment allocated to the STA is allocated to the STA as one RU. [Table 18] [Table 25]

[0187] Seg1, Seg2, Seg3, and Seg4 are four different segments.

[0188] Optionally, the lengths of the first value, the second value, the third value, the fourth value, the fifth value, and the sixth value are all 8 bits. In other words, the resource unit allocation subfield can be 8 bits.

[0189] It will be understood that the foregoing table enumerates all possible combinations of segments. In actual applications, only some of all possible combinations may be used.

[0190] For example, an example of the correspondence between the value of the resource unit allocation subfield and the indicated segment combination RU is shown in Table 19. [Table 19] [Table 26]

[0191] In the third method of Example 2, a compression mode indication method is used, and as a result, the resource overhead can be reduced. Furthermore, the indication method for the segment combination is designed in this method. [Embodiment 2]

[0192] As described in Embodiment 1, the PPDU includes an EHT-SIG-A corresponding to each sub-block (i.e., the second field in Embodiments 1 and 2. Alternatively, the EHT-SIG-A includes the second field when the sub-block includes a plurality of CCs), and an EHT-SIG-B corresponding to each sub-block (i.e., the first field in Embodiments 1 and 2 below. Alternatively, the EHT-SIG-B includes the first field when the sub-block includes a plurality of CCs). For example, the second field is EHT-SIG-A, and the first field is EHT-SIG-B. The M EHT-SIG-As are in a one-to-one correspondence with the M EHT-SIG-Bs. The EHT-SIG-A includes at least one of the following information: the number of symbols of the EHT-SIG-B corresponding to the EHT-SIG-A, the MCS of the EHT-SIG-B, the compression mode of the EHT-SIG-B, the transmission bandwidth of the PPDU, the basic service set color, the guard interval, and the long training sequence size.

[0193] Specifically, FIG. 23 is a schematic diagram of the EHT-SIG-A in a segment according to an embodiment of the present application. As shown in FIG. 23, the entire transmission bandwidth of the PPDU is divided into M sub-blocks in units of 80 MHz or 160 MHz. The AP transmits EHT-SIG-As of the same or different contents in all sub-blocks. The EHT-SIG-A of each sub-block in the PPDU transmitted based on a plurality of sub-blocks may indicate different contents as compared with the completely replicated EHT-SIG-A in the prior art. For example:

[0194] EHT-SIG-B MCS: Different EHT-SIG-B MCSs may be set based on the number of information in the EHT-SIG-B of each sub-block and the channel quality.

[0195] Basic service set color: An identifier of the basic service set where the AP is located. Different sub-blocks may be regarded as different basic service sets and may indicate different basic service set colors.

[0196] EHT-SIG-B Compression Mode: The compression mode is set based on whether the EHT-SIG-B of each sub-block is a combination of sub-blocks or segments or occupies the entire sub-block.

[0197] In addition, different sub-blocks may alternatively have the same EHT-SIG-A parameters.

[0198] EHT-SIG-B Symbol Number: Alignment of all parts of the EHT-SIG-B is guaranteed.

[0199] PPDU Bandwidth: It is uniformly indicated as the bandwidth of the entire PPDU.

[0200] Guard Interval and Long Training Sequence Size: The same value is set to guarantee the alignment of the guard intervals of the EHT-LTF in all sub-blocks and the alignment of the long training sequences of the EHT-LTF in all sub-blocks, and to guarantee symbol-level alignment.

[0201] In summary, the present application provides a resource unit indication method including M EHT-SIG-As. The method of performing indication and transmission based on each sub-block by using EHT-SIG-A supports sub-block-based data transmission. The method is applicable when the STA supports the maximum bandwidth but has relatively few functions. [Embodiment 3]

[0202] Embodiment 1 provides a resource unit indication method based on DL OFDMA and DL MU MIMO. Embodiment 3 provides a resource unit indication method based on a trigger frame. Specifically, FIG. 24 is a flowchart of a resource unit indication method according to an embodiment of the present application. As shown in FIG. 24, the method includes the following steps.

[0203] Step S2401: The AP generates a PPDU, where the PPDU includes M trigger frames, M is an integer greater than 1, the M trigger frames optionally include at least two broadcast trigger frames, the transmission bandwidth of the PPDU is divided into M sub-blocks, the transmission bandwidth is greater than or equal to 40 MHz, the M trigger frames have a one-to-one correspondence with the M sub-blocks, the trigger frame includes a first field, the first field is transmitted on the sub-block corresponding to the trigger frame, and the first field is used by the AP to indicate the RU assigned to at least one of the plurality of STAs.

[0204] Step S2402: The AP transmits the PPDU to a plurality of STAs.

[0205] The station that receives the PPDU may transmit uplink data based on the first field. Specifically, the station that receives the PPDU may determine a specific RU on which the STA can transmit uplink data based on the first field. Further, the STA may transmit uplink data to the AP in the corresponding RU.

[0206] Specifically, the transmission bandwidth of the PPDU can be divided into a plurality of sub-blocks in an 80 MHz sub-block unit. Each trigger frame is used to trigger the STA to perform uplink transmission. The resource unit allocation sub-field in each sub-block (which can be understood as the first field in this embodiment) individually indicates the resource unit allocation status for the STA to which the resource unit allocation sub-field belongs. For example, FIG. 25 is a schematic diagram of a common field and a field for each STA included in four trigger frames in an 80 MHz sub-block unit according to an embodiment of the present application. As shown in FIG. 25, each trigger frame includes a common field and a field for each STA. Optionally, the common field includes an uplink space-time block code, AP transmission power, PPDU extension, uplink space multiplexing, uplink HE-SIG-A reservation, common information based on the trigger frame type, and a reserved field, etc. The field for each STA includes fields such as an association identifier, a resource unit allocation sub-field, an uplink coding type, uplink dual carrier modulation, information on the number of spatial flows / random contention resource units, an indicator of the received signal strength, and station information based on the trigger frame type.

[0207] Furthermore, the AP can transmit trigger frames in the following multiple methods.

[0208] Method 1: The trigger frame is transmitted using an HE or EHT MU PPDU. Specifically, trigger frames in different sub-blocks are transmitted by using different RUs.

[0209] Method 2: Each PPDU is transmitted in a different sub-block in the FDMA method, where each PPDU holds the trigger frame of the corresponding segment.

[0210] Regarding the resource unit allocation subfield, when the RU indicated by the resource unit allocation subfield is less than or equal to the maximum RU included in the sub-block corresponding to the resource unit allocation subfield, the resource unit subfield shown in Table 2 is used to indicate the resource.

[0211] Optionally, when the RU indicated by the resource unit allocation subfield is greater than the maximum RU included in the sub-block corresponding to the resource unit allocation subfield, the RU indicated by the resource unit allocation subfield is a combination of sub-blocks including a plurality of sub-blocks, or the RU indicated by the resource unit allocation subfield is a combination of segments including all or part of the segments included in a plurality of sub-blocks.

[0212] Furthermore, when the transmission bandwidth is 320 MHz and M = 4, the RU indicated by the resource unit allocation subfield is a combination of sub-blocks (the combination of sub-blocks is also referred to as a combination of segments in 80 MHz division units), and one sub-block includes two 80 MHz segments. Correspondingly, the correspondence between the resource unit allocation subfield and the combination of sub-blocks includes at least one of the following entries shown in Table 20. [Table 20]

Table 27

[0213] Part1, Part2, Part3, and Part4 are four different sub-blocks.

[0214] Optionally, the lengths of the first value, the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, the eighth value, the ninth value, the tenth value, and the eleventh value are all 8 bits. In other words, the first field can be 8 bits.

[0215] Note that the mapping relationship between the resource unit allocation subfield and the combination of sub-blocks can change and is not limited to the cases listed in this embodiment of the present application. For example, the mapping relationship can alternatively be as follows: when the resource unit allocation subfield is the first value, the combination of sub-blocks is the combination of Part1 and Part3; when the resource unit allocation subfield is the second value, the combination of sub-blocks is the combination of Part1 and Part2. It should be understood that other alternative cases are also included in the protection scope of the embodiments of the present application. The sub-block identifiers used in the table are the logical identifiers of the sub-blocks. Usually, sub-block identifier 1 (Part1) indicates the lowest frequency 80 MHz channel including the primary 20 MHz channel, sub-block identifier 2 (Part2) indicates the second lowest frequency 80 MHz channel adjacent to Part1, sub-block identifier 3 (Part3) indicates the higher frequency 80 MHz channel adjacent to Part2, and sub-block identifier 4 (Part4) indicates the highest frequency 80 MHz channel adjacent to Part3. The foregoing matters explain the general mapping relationship between the sub-block identifier and the channel. Another mapping relationship between the sub-block identifier and the channel also exists, which is not limited in the present application.

[0216] In addition, the foregoing table lists examples of all possible combinations of four sub-blocks. In actual applications, only some of the combination examples in the foregoing table may be included. In one example, the resource unit allocation subfield can be a combination of sub-blocks with a continuous frequency region. For example, only 6 of the 11 foregoing combination examples may be included: Part1 + Part2, Part2 + Part3, Part3 + Part4, Part1 + Part2 + Part3, Part2 + Part3 + Part4, and Part1 + Part2 + Part3 + Part4.

[0217] This embodiment of the present application further provides a correspondence relationship between the resource unit allocation subfield and the combination RU of sub-blocks. An example is shown in Table 21. [Table 21] [Table 28]

[0218] It should be understood that the correspondence relationship between different values of the resource unit allocation subfield and different combinations of sub-blocks can be replaced and is not limited to this type of correspondence relationship provided in Table 21.

[0219] In each sub-block, it should be noted that only the resource unit allocation in the sub-block needs to be indicated, so it can be understood that a specific 80 MHz does not need to be indicated. Therefore, 1 bit does not need to be additionally transmitted. Or the bit is set as a reserved bit for subsequent use.

[0220] When the transmission bandwidth is 320 MHz and M = 4, in the case of the same bandwidth example, the trigger frame overhead in the present application is reduced to one-fourth compared to the trigger frame overhead in the prior art. Furthermore, the trigger frame in the present application can indicate a combination of sub-blocks that span sub-blocks.

[0221] When the transmission bandwidth is 320 MHz and M = 2, the RUs indicated by the resource unit allocation subfield are combinations of segments. Correspondingly, the correspondence relationship between the resource unit allocation subfield and the combination of segments includes at least one of the following entries shown in Table 22. [Table 22] [Table 29]

[0222] Seg1, Seg2, Seg3, and Seg4 are four different segments.

[0223] Optionally, the lengths of the first value, the second value, the third value, the fourth value, and the fifth value are all 8 bits. In other words, the resource unit allocation subfield can be 8 bits.

[0224] It should be noted that the mapping relationship between the resource unit allocation subfield and the combination of segments can change and is not limited to the cases listed in this embodiment of the present application. For example, the mapping relationship can alternatively be as follows: When the resource unit allocation subfield is the first value, the combination of segments is the combination of Seg1, Seg2, and Seg4. When the resource unit allocation subfield is the second value, the combination of segments is the combination of Seg1, Seg2, and Seg3. It will be understood that other alternative cases are also included in the protection scope of the embodiments of the present application.

[0225] In addition, the above table lists examples of some or all possible combinations of the four segments. In actual applications, only some combination examples in the above table may be included. In one example, the resource unit allocation subfield can indicate a combination of segments with a continuous frequency domain. For example, only two of the above five combination examples may be included, and the two are Seg1 + Seg2 + Seg3 and Seg1 + Seg2 + Seg3 + Seg4.

[0226] This embodiment of the present application further provides a correspondence relationship between the resource unit allocation subfield and the combination RU of segments. An example is shown in Table 23. [Table 23]

Table 30

[0227] When divided into M sub - blocks in a unit with a transmission bandwidth of 160 MHz, the RU indicated by the first field is less than or equal to the 996 - tone RU. The trigger frame further includes a second field. When the second field is the first value, the RU indicated by the first field belongs to the primary 80 MHz in the sub - block corresponding to the trigger frame. Or, when the second field is the second value, the second value is used to indicate that the RU belongs to the secondary 80 MHz in the sub - block corresponding to the trigger frame. Or, when the second field is the first value, the first value is used to indicate that the RU belongs to the low - frequency 80 MHz in the sub - block corresponding to the trigger frame. Or, when the second field is the second value, the second value is used to indicate that the RU belongs to the high - frequency 80 MHz in the sub - block corresponding to the trigger frame.

[0228] When the transmission bandwidth is 320 MHz and M = 2, in the case of the same bandwidth scenario, the trigger - frame overhead in the present application is reduced to one - half compared to the trigger - frame overhead in the prior art. Further, the trigger frame in the present application can indicate a combination of sub - blocks spanning sub - blocks.

[0229] Optionally, when the AP indicates the RU for the STA in the sub - block to which the STA belongs, the RU indicated by the AP is not limited to the sub - block to which the STA belongs and can be further extended across the entire bandwidth. Based on Table 14, 2 bits are further introduced to indicate a specific 80 MHz of 320 MHz.

[0230] Specifically, when the transmission bandwidth is 320 MHz, the trigger frame further includes a third field, and the third field may include 2 bits.

[0231] If the third field is the first value and the RU is less than or equal to the RU of 996 tones, the first value is used to indicate that the RU belongs to the lowest frequency 80 MHz in the transmission bandwidth, or, if the third field is the second value and the RU is less than or equal to the RU of 996 tones, the second value is used to indicate that the RU belongs to the second lowest frequency 80 MHz in the transmission bandwidth, or, if the third field is the third value and the RU is less than or equal to the RU of 996 tones, the third value is used to indicate that the RU belongs to the second highest frequency 80 MHz in the transmission bandwidth, or, if the third field is the fourth value and the RU is less than or equal to the RU of 996 tones, the fourth value is used to indicate that the RU belongs to the highest frequency 80 MHz in the transmission bandwidth, or, if the third field is the first value and the RU is less than or equal to the RU of 996 tones, the first value is used to indicate that the RU belongs to the primary 80 MHz in the transmission bandwidth, or, if the third field is the second value and the RU is less than or equal to the RU of 996 tones, the second value is used to indicate that the RU belongs to the first secondary 80 MHz in the transmission bandwidth, or, if the third field is the third value and the RU is less than or equal to the RU of 996 tones, the third value is used to indicate that the RU belongs to the second secondary 80 MHz in the transmission bandwidth, or, if the third field is the fourth value and the RU is less than or equal to the RU of 996 tones, the fourth value is used to indicate that the RU belongs to the third secondary 80 MHz in the transmission bandwidth.

[0232] For example, the meaning represented by the third field is shown in Table 24. [Table 24]

Table 31

[0233] Optionally, the lengths of the first value, the second value, the third value, and the fourth value are all 2 bits. Table 25 shows an example of the meaning represented by the third field. [Table 25]

Table 32

[0234] Furthermore, after receiving the trigger frame in the corresponding sub-block, the STA determines the specific 80 MHz channel on which the trigger frame is carried based on the third field, and determines the RU assigned by the AP to the STA based on the first field held in the trigger frame, and may transmit uplink data in the RU.

[0235] Based on this, based on the fact that the overhead in this application is reduced compared to the overhead in the prior art, only 1 bit is added to each station, and a more flexible resource unit indication method is implemented. [Embodiment 4]

[0236] Based on Embodiment 1, Embodiment 2 or Embodiment 3, not all of the sub-blocks provided in this application need to have data transmission. In other words, the AP does not need to transmit any data in some sub-blocks. For example, FIG. 26 is a schematic diagram of the transmission of an EHT PPDU in some sub-blocks according to an embodiment of this application. As shown in FIG. 26, no data is transmitted in sub-block 2. This case is applicable when there is interference in some segments. Based on this, the channel resources can be fully utilized.

[0237] In another example, non-EHT data is transmitted in some of the sub-blocks. For example, FIG. 27 is a schematic diagram of the transmission of non-EHT PPDUs in several sub-blocks according to an embodiment of the present application. As shown in FIG. 27, for example, the AP transmits a HE PPDU in the sub-block where the primary 20 MHz is located and transmits an EHT PPDU in other sub-blocks.

[0238] In summary, the flexibility of data transmission can be implemented by using the two examples in the present application. [Embodiment 5]

[0239] FIG. 28 is a schematic block diagram of a device 2800 on the access point side according to an embodiment of the present application. In one embodiment, the device 2800 shown in FIG. 28 may correspond to the access point device in the embodiment of the foregoing method and may have the functions of the access point in the method. Optionally, the device 2800 in this embodiment of the present application may be an access point or a chip of an access point. The device 2800 may include a processing module 2810 and a transceiver module 2820. Optionally, the device 2800 may further include a storage module 2830.

[0240] For example, the processing module 2810 may be configured to generate signals or data information transmitted in the embodiment of the foregoing method, and may be configured to execute steps S1201 and S2401, for example.

[0241] The transceiver module 2820 is configured to support communication between the access point AP, the station, and another node. It will be understood that the transceiver module may include a receiving module and a transmitting module. The transmitting module may be configured to execute steps S1202 and S2402 in the embodiment of the foregoing method.

[0242] The apparatus 2800 according to this embodiment of the present application may correspond to the access point in the method of the foregoing embodiment. It should be understood that the foregoing and other management operations and / or functions of the modules in the apparatus 2800 are each used to implement the corresponding stages of the foregoing method. For the sake of brevity, details are not described here.

[0243] Alternatively, the apparatus 2800 may be configured as a general-purpose processing system, which is generally known as a chip, for example. The processing module 2810 may include one or more processors that provide processing functions. The transceiver module 2820 may be, for example, an input / output interface, a pin, or a circuit. The input / output interface may be configured to be responsible for information exchange between the chip system and the outside. For example, the input / output interface may output a signal or data information generated by the processing module 2810 to another module outside the chip for processing. The processing module may execute computer-executable instructions stored in the storage module to implement the functions of the access point in the embodiments of the foregoing method. In one example, the storage module 2830 optionally included in the apparatus 2800 may be a storage unit inside the chip, such as a register or a cache, or the storage module 2830 may be a storage unit outside the chip, such as a read-only memory (ROM), another type of static storage device capable of storing static information and instructions, or a random access memory (RAM).

[0244] In another example, FIG. 29 is a schematic block diagram of another communication device 2900 on the access point side according to an embodiment of the present application. The device 2900 in this embodiment of the present application can be the access point in the embodiment of the above-described method, and the device 2900 can be configured to implement some or all of the functions of the access point in the embodiment of the above-described method. The device 2900 can include a processor 2910, a baseband circuit 2930, a radio frequency circuit 2940, and an antenna 2950. Optionally, the device 2900 can further include a memory 2920. The components of the device 2900 are connected to each other using a bus 2960. In addition to the data bus, the bus system 2960 includes a power bus, a control bus, and a status signal bus. However, for clarity of explanation, various types of buses in the figure are shown as the bus system 2960.

[0245] The processor 2910 can be configured to control the access point and is configured to execute the processes executed by the access point in the above-described embodiment. The processor 2910 can execute the processing processes related to the access point in the embodiment of the above-described method and / or other processes of the technology described in the present application, and further can operate an operating system. The processor 2910 is responsible for the management of the bus and can execute a program or instruction stored in the memory.

[0246] The baseband circuit 2930, the radio frequency circuit 2940, and the antenna 2950 can be configured to support the transmission and reception of information between the access point and the station, and to support wireless communication between the access point and another node. For example, the PPDU can be processed by the processor 2910, baseband processing such as protocol-based encapsulation and coding can be performed by the baseband circuit 2930, radio frequency processing such as analog conversion, filtering, amplification, and upconversion can be further performed by the radio frequency circuit 2940, and then transmitted to the station by the antenna 2950. It will be understood that the baseband circuit 2930, the radio frequency circuit 2940, and the antenna 2950 can be further configured to support communication between the access point and another network entity, for example, communication between the access point and a network element on the core network side.

[0247] The memory 2920 can be configured to store the program code and data of the access point, and the memory 2920 can be the storage module 2830 in FIG. 28. As shown in FIG. 29, the memory 2920 is separated from the processor 2910. However, those skilled in the art will readily understand that the memory 2920 or any part of the memory 2920 can be located outside the device 2900. For example, the memory 2920 can include a transmission line and / or a computer product separated from the wireless node. These media can be accessed by the processor 2910 using the bus interface 2960. Alternatively, the memory 2920 or any part of the memory 2920 can be integrated into the processor 2910, for example, it can be a cache and / or a general-purpose register.

[0248] In one example, in FIG. 28, the transceiver 2820 may include a baseband circuit 2930, a radio frequency circuit 2940, and an antenna 2950, and the processing module 2810 may be a processor 2910. In another example, in FIG. 28, the transceiver 2820 may include only the antenna in FIG. 29, and the processing module 2810 may include a processor 2910 and may further include a radio frequency circuit 2940 and a baseband circuit 2930. In yet another example, in FIG. 28, the processing module 2810 may include a processor 2910 and a baseband circuit 2930, and the transceiver 2820 may include a radio frequency circuit 2940 and an antenna 2950.

[0249] It will be understood that FIG. 29 shows only a simplified design of the access point. For example, in actual applications, the access point may include any number of transmitters, receivers, processors, memories, etc., and all access points capable of implementing the present invention are included within the protection scope of the present invention.

[0250] Embodiments of the present application further provide a computer-readable storage medium. The computer-readable storage medium stores instructions that may be executed by one or more processors in a processing circuit. When the computer-readable storage medium operates on a computer, the computer can execute the methods in the foregoing embodiments. [Embodiment 6]

[0251] FIG. 30 is a schematic block diagram of a station-side device 3000 according to an embodiment of the present application. In one embodiment, the device 3000 shown in FIG. 30 may correspond to the station device in the method embodiments described above and may have the functions of the station in the method. Optionally, the device 3000 in this embodiment of the present application may be a station or may be a chip of the station. The device 3000 may include a processing module 3010 and a transceiver module 3020. Optionally, the device 3000 may further include a storage module 3030.

[0252] For example, the transceiver module 3020 is configured to support communication between the station STA, the access point AP, and another node. It will be understood that the transceiver module may include a receiving module and a transmitting module. The receiving module may be configured to receive the PPDU transmitted in step S1202 or S2402 in the embodiment of the foregoing method.

[0253] The processing module 3010 may be configured to analyze the PPDU received by the receiving module based on signal information such as the first field and the second field in the embodiment of the foregoing method.

[0254] The apparatus 3000 according to this embodiment of the present application may correspond to the station in the method of the foregoing embodiment. It should be understood that the foregoing and other management operations and / or functions of the modules in the apparatus 3000 are respectively used to implement the corresponding steps of the foregoing method. For the sake of brevity, details are not described herein.

[0255] Alternatively, the apparatus 3000 may be configured as a general-purpose processing system, which is generally known as a chip, for example. The processing module 3010 may include one or more processors that provide processing capabilities. The transceiver module 3020 may be, for example, an input / output interface, pins, or circuitry. The input / output interface may be configured to be responsible for information exchange between the chip system and the outside. For example, the input / output interface may output a PPDU received from another module outside the chip to the internal processing module 3010 of the chip for processing. The processing module may execute computer-executable instructions stored in the storage module to implement the functions of the station in the foregoing method embodiments. In one example, the storage module 3030 optionally included in the apparatus 3000 may be an internal storage unit of the chip, such as a register or cache, or the storage module 3030 may be an external storage unit of the chip, such as a read-only memory (ROM), another type of static storage device capable of storing static information and instructions, or a random access memory (RAM).

[0256] In another example, FIG. 31 is a schematic block diagram of another communication apparatus 3100 on the station side according to an embodiment of the present application. The apparatus 3100 in this embodiment of the present application may be a station in the method embodiments described above, and the apparatus 3100 may be configured to implement some or all of the functions of the station in the method embodiments described above. The apparatus 3100 may include a processor 3110, a baseband circuit 3130, a radio frequency circuit 3140, and an antenna 3150. Optionally, the apparatus 3100 may further include a memory 3120. The components of the apparatus 3100 are connected to each other using a bus 3160. In addition to the data bus, the bus system 3160 includes a power bus, a control bus, and a status signal bus. However, for clarity of explanation, various types of buses in the figure are shown as the bus system 3160.

[0257] The processor 3110 may be configured to control the station and execute the processes executed by the station in the foregoing embodiments. The processor 3110 may execute the processing processes related to the station in the method embodiments described above and / or other processes of the technology described in the present application, and may further operate the operating system. The processor 3110 is responsible for the management of the bus and may execute programs or instructions stored in the memory.

[0258] The baseband circuit 3130, the radio frequency circuit 3140, and the antenna 3150 may be configured to support the transmission and reception of information between the station and the access point and support wireless communication between the station and another node. For example, the PPDU transmitted by the access point is received by the antenna 3150, processing such as filtering, amplification, downconversion, and digitization is executed by the radio frequency circuit 3140, baseband processing such as decoding and protocol-based data decapsulation is executed by the baseband circuit 3130, and then the processing is executed by the processor 3110 to restore the service data and signal information transmitted by the station. It will be understood that the baseband circuit 3130, the radio frequency circuit 3140, and the antenna 3150 may further be configured to support communication between the station and another network entity.

[0259] Memory 3120 may be configured to store the program code and data of the station, and the memory 3120 may be the storage module 3030 in FIG. 30. As shown in FIG. 31, the memory 3120 is separated from the processor 3110. However, those skilled in the art can very easily understand that the memory 3120 or any part of the memory 3120 may be located outside the device 3100. For example, the memory 3120 may include a transmission line and / or a computer product separated from the wireless node. These media can be accessed by the processor 3110 using the bus interface 3160. Alternatively, the memory 3120 or any part of the memory 3120 may be integrated into the processor 3110 and may be, for example, a cache and / or a general-purpose register.

[0260] In one example, in FIG. 30, the transceiver 3020 may include a baseband circuit 3130, a radio frequency circuit 3140, and an antenna 3150, and the processing module 3010 may be the processor 3110. In another example, in FIG. 30, the transceiver 3020 may include only the antenna in FIG. 31, and the processing module 3010 may include the processor 3110 and may further include a radio frequency circuit 3140 and a baseband circuit 3130. In still another example, in FIG. 30, the processing module 3010 may include the processor 3110 and the baseband circuit 3130, and the transceiver 3020 may include the radio frequency circuit 3140 and the antenna 3150.

[0261] It should be understood that FIG. 31 shows only a simplified design of the station. For example, in actual applications, the station may include any number of transmitters, receivers, processors, or memories, etc., and all stations capable of implementing the present invention are included in the protection scope of the present invention.

[0262] Embodiments of the present application further provide a computer-readable storage medium. The computer-readable storage medium stores instructions that can be executed by one or more processors in a processing circuit. When the computer-readable storage medium operates on a computer, the computer can execute the methods in the foregoing embodiments.

[0263] Embodiments of the present application further provide a chip system. The chip system includes a processor configured to support access points in implementing functions in the foregoing embodiments, such as generating or processing data and / or information in the foregoing methods.

[0264] In a possible design, the chip system may further include a memory. The memory is configured to store program instructions and data required for the access point. The chip system may include a chip, or may include a chip and another discrete device.

[0265] Embodiments of the present application further provide another chip system. The chip system includes a processor configured to support a station in implementing functions in the foregoing embodiments, such as generating or processing data and / or information in the foregoing methods.

[0266] In a possible design, the chip system may further include a memory. The memory is configured to store program instructions and data required for the access point. The chip system may include a chip, or may include a chip and another discrete device.

[0267] In a possible design, the chip system may further include a memory. The memory is configured to store program instructions and data required for the station. The chip system may include a chip, or may include a chip and another discrete device.

[0268] Embodiments of the present application further provide a computer program product including instructions. When the computer program product runs on a computer, the computer can execute the methods and functions related to the access point AP in any of the foregoing embodiments.

[0269] Embodiments of the present application further provide a computer program product including instructions. When the computer program product runs on a computer, the computer can execute the methods and functions related to the station STA in any of the foregoing embodiments. [Other conceivable items] [Item 1] A resource unit indication method, A step in which an access point AP transmits a physical protocol data unit PPDU to a plurality of stations STA, where the transmission bandwidth of the PPDU is divided into M sub-blocks, M is an integer greater than 1, the transmission bandwidth is greater than or equal to 80 MHz, the PPDU includes M first fields, the M first fields have a one-to-one correspondence with the M sub-blocks, the first field is transmitted on the corresponding sub-block, and the first field is used to indicate a resource unit RU assigned by the AP to at least one of the plurality of stations STA. The method includes a transmitting step. [Item 2] A resource unit indication method, A stage in which a station STA receives a physical protocol data unit PPDU transmitted by an access point AP, wherein the transmission bandwidth of the PPDU is divided into M sub-blocks, M is an integer greater than 1, the transmission bandwidth is greater than or equal to 80 MHz, the PPDU includes M first fields, the M first fields have a one-to-one correspondence with the M sub-blocks, the first field is transmitted on the corresponding sub-block, the first field is used to indicate a resource unit RU assigned by the AP to at least one of a plurality of STAs, and the STA is any one of the plurality of STAs, the receiving stage; The stage in which the STA analyzes the PPDU based on the first field; A method comprising the above. [Item 3] If the RU is larger than the maximum RU included in the sub-block corresponding to the first field, the RU is a combination of sub-blocks including a plurality of sub-blocks, or the RU is a combination of segments including all or part of the segments included in a plurality of sub-blocks. The method according to Item 1 or 2. [Item 4] The PPDU further includes indication information, and the indication information is used to indicate the number of STAs transmitting data in the RU. The method according to Item 3. [Item 5] The first field is further used to indicate the number of STAs transmitting data in the RU. The method according to Item 3. [Item 6] The RU includes the sub-block corresponding to the first field. The method according to any one of Items 3 to 5. [Item 7] A resource unit indication method, A method for an access point AP to transmit a physical protocol data unit PPDU to a plurality of stations STA, where the PPDU includes M trigger frames, M being an integer greater than 1. Here, the transmission bandwidth of the PPDU is divided into M sub-blocks, the transmission bandwidth is greater than or equal to 40 MHz, the M trigger frames have a one-to-one correspondence with the M sub-blocks, the trigger frame includes a first field, the first field is transmitted on the sub-block corresponding to the trigger frame, and the first field is used to indicate a resource unit RU assigned by the AP to at least one of the plurality of STAs, comprising the step of transmitting. [Item 8] A resource unit indication method, comprising: A step for a station STA to receive a physical protocol data unit PPDU transmitted by an access point AP, where the PPDU includes M trigger frames, M being an integer greater than 1, the transmission bandwidth of the PPDU is divided into M sub-blocks, the transmission bandwidth is greater than or equal to 40 MHz, the M trigger frames have a one-to-one correspondence with the M sub-blocks, the trigger frame includes a first field, the first field is transmitted on the sub-block corresponding to the trigger frame, the first field is used to indicate a resource unit RU assigned by the AP to at least one of the plurality of STAs, and the STA is any one of the plurality of STAs, the step of receiving; A step for the STA to transmit uplink data based on the first field; and The method according to item 7 or 8, where when the RU is greater than the maximum RU included in the sub-block corresponding to the first field, the RU is a combination of sub-blocks including a plurality of sub-blocks, or the RU is a combination of segments including all or part of the segments included in the plurality of sub-blocks. [Item 9] The method according to item 7 or 8, where when the RU is greater than the maximum RU included in the sub-block corresponding to the first field, the RU is a combination of sub-blocks including a plurality of sub-blocks, or the RU is a combination of segments including all or part of the segments included in the plurality of sub-blocks. [Item 10] When the above transmission bandwidth is divided into M sub - blocks in a unit of 160 MHz, the above trigger frame further includes a second field, When the second field is a first value and the RU is less than or equal to a 996 - tone RU, the first value is used to indicate that the RU belongs to the primary 80 MHz in the sub - block corresponding to the trigger frame, or, When the second field is a second value and the RU is less than or equal to a 996 - tone RU, the second value is used to indicate that the RU belongs to the secondary 80 MHz in the sub - block corresponding to the trigger frame, or, When the second field is a first value and the RU is less than or equal to a 996 - tone RU, the first value is used to indicate that the RU belongs to the low - frequency 80 MHz in the sub - block corresponding to the trigger frame, or, When the second field is a second value and the RU is less than or equal to a 996 - tone RU, the second value is used to indicate that the RU belongs to the high - frequency 80 MHz in the sub - block corresponding to the trigger frame, The method according to any one of items 7 to 9. [Item 11] When the above transmission bandwidth is 320 MHz, the above trigger frame further includes a third field, When the third field is a first value and the RU is less than or equal to a 996 - tone RU, the first value is used to indicate that the RU belongs to the lowest - frequency 80 MHz in the above transmission bandwidth, or, When the third field is a second value and the RU is less than or equal to a 996 - tone RU, the second value is used to indicate that the RU belongs to the second - lowest - frequency 80 MHz in the above transmission bandwidth, or, If the third field is a third value and the RU is less than or equal to the RU of 996 tones, the third value is used to indicate that the RU belongs to the second highest frequency 80 MHz in the transmission bandwidth, or, If the third field is a fourth value and the RU is less than or equal to the RU of 996 tones, the fourth value is used to indicate that the RU belongs to the highest frequency 80 MHz in the transmission bandwidth, or, If the third field is a first value and the RU is less than or equal to the RU of 996 tones, the first value is used to indicate that the RU belongs to the primary 80 MHz in the transmission bandwidth, or, If the third field is a second value and the RU is less than or equal to the RU of 996 tones, the second value is used to indicate that the RU belongs to the first secondary 80 MHz in the transmission bandwidth, or, If the third field is a third value and the RU is less than or equal to the RU of 996 tones, the third value is used to indicate that the RU belongs to the second secondary 80 MHz in the transmission bandwidth, or, If the third field is a fourth value and the RU is less than or equal to the RU of 996 tones, the fourth value is used to indicate that the RU belongs to the third secondary 80 MHz in the transmission bandwidth, the method according to any one of items 7 to 9. [Item 12] The RU includes the sub-block corresponding to the first field, the method according to any one of items 7 to 10. [Item 13] A resource unit indicating device, wherein the device is an access point AP, A processing module configured to generate a physical protocol data unit PPDU, configured to transmit the above PPDU to a plurality of stations STA, the transmission bandwidth of the above PPDU is divided into M sub-blocks, M is an integer greater than 1, the above transmission bandwidth is greater than or equal to 80 MHz, the above PPDU includes M first fields, the M above first fields have a one-to-one correspondence with the M above sub-blocks, the above first field is transmitted on the corresponding sub-block, the above first field is used to indicate a resource unit RU assigned by the above AP to at least one of the plurality of stations STA, a transmission module and An apparatus comprising. [Item 14] A resource unit indicating device, the above device is a station STA, receiving a physical protocol data unit PPDU transmitted by an access point AP, the transmission bandwidth of the above PPDU is divided into M sub-blocks, M is an integer greater than 1, the above transmission bandwidth is greater than or equal to 80 MHz, the above PPDU includes M first fields, the M above first fields have a one-to-one correspondence with the M above sub-blocks, the above first field is transmitted on the corresponding sub-block, the above first field is used to indicate a resource unit RU assigned by the above AP to at least one of the plurality of STAs, and the above STA is any one of the plurality of STAs, a receiving module configured to perform receiving, and a processing module configured to analyze the above PPDU based on the above first field and An apparatus comprising. [Item 15] When the above RU is larger than the maximum RU included in the above sub-block corresponding to the above first field, the above RU is a combination of sub-blocks including a plurality of sub-blocks, or the above RU is a combination of segments including all or part of the segments included in a plurality of sub-blocks. The apparatus according to Item 13 or 14. [Item 16] The above PPDU further includes indication information, and the indication information is used to indicate the number of STAs that transmit data in the above RU, and the device described in item 15. [Item 17] The above first field is further used to indicate the number of STAs that transmit data in the above RU, and the device described in item 15. [Item 18] The above RU includes the above sub-block corresponding to the above first field, and the device described in any one of items 15 to 17. [Item 19] A resource unit indicating device, wherein the device is an access point AP, A processing module configured to generate a physical protocol data unit PPDU, Transmitting the above PPDU to a plurality of stations STA, wherein the above PPDU includes M trigger frames, M is an integer greater than 1, The transmission bandwidth of the above PPDU is divided into M sub-blocks, the transmission bandwidth is greater than or equal to 40 MHz, the M above trigger frames have a one-to-one correspondence with the M above sub-blocks, the trigger frame includes a first field, the first field is transmitted on the sub-block corresponding to the trigger frame, and the first field is used to indicate a resource unit RU assigned by the above AP to at least one of the above plurality of STAs, and a transmission module configured to perform the transmission A device comprising. [Item 20] A resource unit indicating device, wherein the device is a station STA, A receiving module configured to receive a physical protocol data unit (PPDU) transmitted by an access point (AP), where the PPDU includes M trigger frames, M being an integer greater than 1, the transmission bandwidth of the PPDU is divided into M sub-blocks, the transmission bandwidth is greater than or equal to 40 MHz, the M trigger frames have a one-to-one correspondence with the M sub-blocks, the trigger frame includes a first field, the first field is transmitted on the sub-block corresponding to the trigger frame, and the first field is used to indicate a resource unit (RU) assigned by the AP to at least one of a plurality of STAs, where the STA is any one of the plurality of STAs; A processing module configured to transmit uplink data based on the first field; A method comprising the above. [Item 21] The apparatus according to item 19 or 20, wherein when the RU is larger than the maximum RU included in the sub-block corresponding to the first field, the RU is a combination of sub-blocks including a plurality of sub-blocks, or the RU is a combination of segments including all or part of the segments included in a plurality of sub-blocks. [Item 22] When the transmission bandwidth is divided into M sub-blocks in units of 160 MHz, the trigger frame further includes a second field, When the second field is a first value and the RU is less than or equal to a 996-tone RU, the first value is used to indicate that the RU belongs to the primary 80 MHz in the sub-block corresponding to the trigger frame, or When the second field is a second value and the RU is less than or equal to a 996-tone RU, the second value is used to indicate that the RU belongs to the secondary 80 MHz in the sub-block corresponding to the trigger frame, or When the second field is the first value and the RU is less than or equal to the RU of 996 tones, the first value is used to indicate that the RU belongs to the low frequency of 80 MHz in the sub-block corresponding to the trigger frame, or, When the second field is the second value and the RU is less than or equal to the RU of 996 tones, the second value is used to indicate that the RU belongs to the high frequency of 80 MHz in the sub-block corresponding to the trigger frame, the apparatus according to any one of items 19 to 21. [Item 23] When the transmission bandwidth is 320 MHz, the trigger frame further includes a third field, When the third field is the first value and the RU is less than or equal to the RU of 996 tones, the first value is used to indicate that the RU belongs to the lowest frequency of 80 MHz in the transmission bandwidth, or, When the third field is the second value and the RU is less than or equal to the RU of 996 tones, the second value is used to indicate that the RU belongs to the second lowest frequency of 80 MHz in the transmission bandwidth, or, When the third field is the third value and the RU is less than or equal to the RU of 996 tones, the third value is used to indicate that the RU belongs to the second highest frequency of 80 MHz in the transmission bandwidth, or, When the third field is the fourth value and the RU is less than or equal to the RU of 996 tones, the fourth value is used to indicate that the RU belongs to the highest frequency of 80 MHz in the transmission bandwidth, or, When the third field is the first value and the RU is less than or equal to the RU of 996 tones, the first value is used to indicate that the RU belongs to the primary 80 MHz in the transmission bandwidth, or, If the third field is the second value and the RU is less than or equal to the 996-tone RU, the second value is used to indicate that the RU belongs to the first secondary 80 MHz in the transmission bandwidth, or If the third field is the third value and the RU is less than or equal to the 996-tone RU, the third value is used to indicate that the RU belongs to the second secondary 80 MHz in the transmission bandwidth, or If the third field is the fourth value and the RU is less than or equal to the 996-tone RU, the fourth value is used to indicate that the RU belongs to the third secondary 80 MHz in the transmission bandwidth, the apparatus according to any one of items 19 to 21. [Item 24] The apparatus according to any one of items 19 to 23, wherein the RU includes the sub-block corresponding to the first field. [Item 25] A computer-readable storage medium, the computer-readable storage medium being configured to store instructions, and when the instructions operate on a computer, the computer is capable of executing the method according to any one of items 1 to 12, the computer-readable storage medium. [Item 26] A computer program product, the computer program product comprising one or more computer instructions, and when the computer instructions operate on a computer, the computer is capable of executing the method according to any one of items 1 to 12, the computer program product. [Item 27] An apparatus comprising one or more processors and an input / output interface, the input / output interface being configured to be responsible for input and output of information or signaling of the apparatus, and the one or more processing circuits being configured to execute instructions for implementing the method according to any one of items 1 to 12, the apparatus. [Item 28] An apparatus comprising a processor and a memory, wherein the memory is configured to store instructions, and when the instructions operate on the processor, the apparatus is capable of executing the method according to any one of items 1 to 12. [Item 29] An apparatus configured to implement the method according to any one of items 1 to 12.

Claims

1. A resource unit indication method, comprising: a step in which an access point (AP) transmits a physical protocol data unit (PPDU) to a plurality of stations (STAs), wherein a transmission bandwidth of the PPDU divided into four sub-blocks is 320 MHz, a transmission bandwidth of each sub-block is equal to 80 MHz, the PPDU includes four first fields, the four first fields have a one-to-one correspondence with the four sub-blocks, the first field is transmitted on one corresponding sub-block, and the first field is used to indicate a resource unit (RU) allocated by the AP to at least one of the plurality of STAs, the step of transmitting; each of the sub-blocks has four channels: a first channel, a second channel, a third channel, and a fourth channel, and two content channels (CC1 and CC2) are transmitted on the four channels; in each sub-block, the CC1 is transmitted on the first channel and the third channel, and the CC2 is transmitted on the second channel and the fourth channel; for the four sub-blocks, information carried by the CC1 of one sub-block is different from information carried by the CC1 of another sub-block, and information carried by the CC2 of one sub-block is different from information carried by the CC2 of another sub-block.

2. A resource unit indication method, comprising: a step in which a station (STA) receives a physical protocol data unit (PPDU) transmitted by an access point (AP), wherein a transmission bandwidth of the PPDU divided into four sub-blocks is 320 MHz, a transmission bandwidth of each sub-block is equal to 80 MHz, the PPDU includes four first fields, the four first fields have a one-to-one correspondence with the four sub-blocks, the first field is transmitted on one corresponding sub-block, the first field is used to indicate a resource unit (RU) allocated by the AP to at least one of a plurality of STAs, and the STA is any one of the plurality of STAs. Each of the sub - blocks has four channels: a first channel, a second channel, a third channel, and a fourth channel. On the four channels, two content channels (CC1 and CC2) are transmitted. In each sub - block, the CC1 is transmitted on the first channel and the third channel, and the CC2 is transmitted on the second channel and the fourth channel. For the four sub - blocks, the information carried by the CC1 of one sub - block is different from the information carried by the CC1 of another sub - block, and the information carried by the CC2 of one sub - block is different from the information carried by the CC2 of another sub - block. This is a stage. The stage where the STA analyzes the PPDU based on the first field A method comprising the above.

3. If the RU is larger than the maximum RU included in the sub - block corresponding to the first field, the RU is a combined RU of sub - blocks including a plurality of sub - blocks, or the RU is a combined RU of segments including all or some of the segments included in a plurality of sub - blocks. The method according to claim 1 or 2.

4. The PPDU further includes four second fields. The four second fields have a one - to - one correspondence with the four first fields. The second field includes at least one of the following information: basic service set color, the number of symbols of the first field corresponding to the second field, the modulation and coding scheme (MCS) of the first field corresponding to the second field, the compression mode of the first field corresponding to the second field, the transmission bandwidth of the PPDU, etc. The method according to claim 1 or 2.

5. At least one of two pieces of information, such as the number of symbols of the first field corresponding to the second field included in the second field corresponding to each sub - block of the four sub - blocks, and the transmission bandwidth of the PPDU, is the same. The method according to claim 4.

6. The method according to claim 4, wherein the modulation and coding scheme of the first field corresponding to the second field in the four second fields corresponding to each of the four sub-blocks is different.

7. The method according to claim 1 or 2, wherein the PPDU further includes a guard interval corresponding to four sub-blocks and a parameter of a long training sequence size, and values of the guard interval and the long training sequence size for any sub-block corresponding to the four sub-blocks are the same.

8. The method according to claim 1 or 2, wherein the PPDU further includes indication information, and the indication information is used to indicate the number of STAs transmitting data in the RU.

9. The method according to claim 1 or 2, wherein the first field is further used to indicate the number of STAs transmitting data in the RU.

10. The method according to claim 1 or 2, wherein the RU includes the sub-block corresponding to the first field.

11. In each of the sub-blocks, the resource unit allocation sub-field of the first field is used to indicate the number of STAs transmitting data on the combined RU of the sub-blocks in addition to indicating the combined RU of the sub-blocks. The method according to claim 1 or 2.

12. The method according to claim 4, wherein the second field corresponding to each of the four sub-blocks indicates different contents.

13. A resource unit indicating device, wherein the device is an access point (AP), a processing module configured to generate a physical protocol data unit (PPDU), a transmission module configured to transmit the PPDU to a plurality of stations (STAs), The transmission bandwidth of the PPDU divided into four sub-blocks is 320 MHz, the transmission bandwidth of each sub-block is equal to 80 MHz, the PPDU includes four first fields, the four first fields have a one-to-one correspondence with the four sub-blocks, the first field is transmitted on a corresponding sub-block, and the first field is used to indicate a resource unit (RU) allocated by the AP to at least one of the plurality of stations (STAs), a transmission module comprising Each of the sub-blocks has four channels, namely a first channel, a second channel, a third channel and a fourth channel, and two content channels (CC1 and CC2) are transmitted on the four channels. In each sub-block, CC1 is transmitted on the first channel and the third channel, and CC2 is transmitted on the second channel and the fourth channel. For the four sub-blocks, the information carried by CC1 of one sub-block is different from the information carried by CC1 of another sub-block, and the information carried by CC2 of one sub-block is different from the information carried by CC2 of another sub-block.

14. A resource unit indicating device, wherein the device is a station (STA), a receiving module configured to receive a physical protocol data unit (PPDU) transmitted by an access point (AP), the transmission bandwidth of the PPDU divided into four sub-blocks is 320 MHz, the transmission bandwidth of each sub-block is equal to 80 MHz, the PPDU includes four first fields, the four first fields have a one-to-one correspondence with the four sub-blocks, the first field is transmitted on a corresponding sub-block, the first field is used to indicate a resource unit (RU) allocated by the AP to at least one of the plurality of STAs, and the STA is any one of the plurality of STAs, a receiving module a processing module configured to analyze the PPDU based on the first field comprising Each of the sub - blocks has four channels: a first channel, a second channel, a third channel, and a fourth channel. On the four channels, two content channels (CC1 and CC2) are transmitted. In each sub - block, the CC1 is transmitted on the first channel and the third channel, and the CC2 is transmitted on the second channel and the fourth channel. For the four sub - blocks, the information carried by the CC1 of one sub - block is different from the information carried by the CC1 of another sub - block, and the information carried by the CC2 of one sub - block is different from the information carried by the CC2 of another sub - block.

15. When the RU is greater than the maximum RU included in the sub - block corresponding to the first field, the RU is a combined RU of sub - blocks including a plurality of sub - blocks, or the RU is a combined RU of segments including all or some of the segments included in a plurality of sub - blocks. The device according to claim 13 or 14.

16. The PPDU further includes four second fields, and the four second fields have a one - to - one correspondence with the four first fields. The second field includes at least one of the following information: the basic service set color, the number of symbols of the first field corresponding to the second field, the modulation and coding scheme (MCS) of the first field corresponding to the second field, the compression mode of the first field corresponding to the second field, the transmission bandwidth of the PPDU, etc. The device according to claim 13 or 14.

17. At least one of two pieces of information, such as the number of symbols of the first field corresponding to the second field included in the second field corresponding to each sub - block of the four sub - blocks, and the transmission bandwidth of the PPDU, is the same. The device according to claim 16.

18. The modulation and coding schemes of the first fields corresponding to the second fields in the four second fields corresponding to each sub - block of the four sub - blocks are different. The device according to claim 16.

19. The PPDU further includes a guard interval corresponding to four sub-blocks and a parameter of a long training sequence size, and values of the guard interval and the long training sequence size of any sub-block corresponding to the four sub-blocks are the same. The apparatus according to claim 13 or 14.

20. The PPDU further includes indication information, and the indication information is used to indicate the number of STAs transmitting data in the RU. The apparatus according to claim 13 or 14.

21. The first field is further used to indicate the number of STAs transmitting data in the RU. The apparatus according to claim 13 or 14.

22. The RU includes the sub-block corresponding to the first field. The apparatus according to claim 13 or 14.

23. In each of the sub-blocks, the resource unit allocation sub-field of the first field is used to indicate the number of STAs transmitting data on the combined RU of the sub-blocks in addition to indicating the combined RU of the sub-blocks. The apparatus according to claim 13 or 14.

24. The second field corresponding to each of the four sub-blocks indicates different contents. The apparatus according to claim 17.

25. A computer-readable storage medium, the computer-readable storage medium is configured to store instructions, and when the instructions operate on a computer, the computer can execute the method according to claim 1 or claim 2. A computer-readable storage medium.

26. A computer program for causing a computer to execute the method according to claim 1 or claim 2.

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