Data transmission method and apparatus, and storage medium
A transmit end sends a physical layer protocol data unit (PPDU) to a receive end, where a bandwidth of the PPDU is P×10 MHz. The PPDU includes a first part of fields and a second part of fields. A quantity of tones per 10-MHz tone distribution corresponding to the first part of fields is 64, and a tone spacing is 156.25 kHz. A quantity of tones per 10-MHz tone distribution corresponding to the second part of fields is 128, and a tone spacing is 78.125 kHz. The corresponding method is applicable to 10 MHz, 20 MHz, 40 MHz, 60 MHz, so that a transmission bandwidth is increased compared with that of 802.11p, as well as a system throughput. The transmit end may transmit data by some RUs to increase a data transmission distance, or may simultaneously transmit data of different services by a plurality of RUs to improve data transmission efficiency.
1. A transmit end, comprising:
a processor to generate a physical layer protocol data unit (PPDU); and
a transceiver to send the PPDU to a receive end,
wherein a bandwidth of the PPDU is P×10 megahertz MHz, the PPDU comprises a first part of fields and a second part of the fields, wherein a quantity of tones per 10-MHz tone distribution corresponding to the first part of the fields is 64 and a tone spacing is 156.25 kHz, wherein a quantity of tones per 10-MHz tone distribution corresponding to the second part of the fields is 128 and a tone spacing is 78.125 kHz, and wherein P is a positive integer greater than or equal to 1,
wherein each 10-MHz tone distribution corresponding to the second part of fields comprises M1 26-tone resource units (RUs), M2 52-tone RUs, M3 106-tone RUs, M4 guard tones, M5 null tones, and M6 direct current tones, and
wherein M1×26+M2×52+M3×106+M4+M5+M6=128, and wherein M1, M2, M3, M4, M5, and M6 are integers greater than or equal to 0.
2. The transmit end according to claim 1 , wherein
M1=4, M2=0, M3=0, and M4+M5+M6=24; M41 guard tones and M42 guard tones are provided on two sides of the four 26-tone RUs, and M41+M42=M4,
M1=0, M2=2, M3=0, and M4+M5+M6=24; M43 guard tones and M44 guard tones are provided on two sides of the two 52-tone RUs, and M43+M44=M4,
M1=0, M2=0, M3=1, and M4+M5+M6=22; M45 guard tones and M46 guard tones are provided on two sides of the two 52-tone RUs, and M45+M46=M4, or
M1=2, M2=1, M3=0, and M4+M5+M6=24; M47 guard tones and M48 guard tones are provided on two sides of the two 26-tone RUs and the one 52-tone RU, and M47+M48=M4.
3. The transmit end according to claim 2 , wherein
M1=2, M2=0, M3=0, M41=9, M42=8, M5=2, and M6=5,
M1=0, M2=2, M3=0, M43=9, M44=8, M5=2, and M6=5,
M1=0, M2=0, M3=1, M45=9, M46=8, M5=0, and M6=5, or
M1=2, M2=1, M3=0, M47=9, M48=8, M5=2, and M6=5.
4. The transmit end according to claim 3 , wherein
when M41=9 and M42=8, M41 guard tones fall within a range of [−64, −56] and M42 guard tones fall within a range of [56, 63]; or M41 guard tones fall within the range of [ 56 , 63 ] and M42 guard tones fall within the range of [−64, −56];
when M43=9 and M44=8, M43 guard tones fall within the range of [−64, −56] and M44 guard tones fall within the range of [56, 63]; or M43 guard tones fall within the range of [56, 63] and M44 guard tones fall within the range of [−64, −56];
when M45=9 and M46=8, M45 guard tones fall within the range of [−64, −56] and M46 guard tones fall within the range of [56, 63]; or M45 guard tones fall within the range of [56, 63] and M46 guard tones fall within the range of [−64, −56]; and
when M47=9 and M48=8, M47 guard tones fall within the range of [−64, −56] and M48 guard tones fall within the range of [56, 63]; or M47 guard tones fall within the range of [56, 63] and M48 guard tones fall within the range of [−64, −56].
5. A transmit end, comprising:
a processor to generate a physical layer protocol data unit (PPDU), and
a transceiver to send the PPDU to a receive end,
wherein a bandwidth of the PPDU is P×10 megahertz MHz, the PPDU comprises a first part of fields and a second part of the fields, wherein a quantity of tones per 10-MHz tone distribution corresponding to the first part of the fields is 64 and a tone spacing is 156.25 kHz, wherein a quantity of tones per 10-MHz tone distribution corresponding to the second part of the fields is 128 and a tone spacing is 78.125 kHz, and wherein P is a positive integer greater than or equal to 1, and
wherein the first part of the fields comprises resource indication information, wherein the resource indication information is used to indicate resource unit (RU) allocation within a range of one or more 106-tone RUs, or the resource indication information is used to indicate RU allocation within a range of one or more 242-tone RUs.
6. The transmit end according to claim 5 , wherein
when the resource indication information is used to indicate the RU allocation within a range of one or more 242-tone RUs, for RU allocation within a range of any 242-tone RU, the resource indication information comprises:
a first resource indication subfield used to indicate an RU allocation status on a first 106-tone RU in the 242-tone RU,
a second resource indication subfield used to indicate an RU allocation status on a second 106-tone RU in the 242-tone RU, and
a third resource indication subfield used to indicate an allocation status on a 26-tone RU between the first 106-tone RU and the second 106-tone RU.
7. The transmit end according to claim 5 , wherein the resource indication information is replicated on two 10-MHz bandwidths corresponding to the 242-tone RU.
8. The transmit end according to claim 1 , wherein the first part of the fields comprises a legacy-long training field (L-LTF), the second part of the fields comprises a training field, and the training field and the L-LTF are jointly used for channel measurement in a space time block coding (STBC) scenario, wherein
the training field occupies one symbol, the L-LTF is multiplied by a first column of a matrix P 2*2 ; and the training field is multiplied by a second column of the matrix P 2*2 ; and the matrix P is used to distinguish between a first space-time stream and a second space-time stream, wherein
P
2
*
2
=
[
1
-
1
1
1
]
.
9. A receive end, comprising:
a transceiver to receive a physical layer protocol data unit (PPDU) sent by a transmit end, wherein a bandwidth of the PPDU is P×10 megahertz MHz, the PPDU comprises a first part of fields and a second part of the fields, wherein a quantity of tones per 10-MHz tone distribution corresponding to the first part of the fields is 64, and a tone spacing is 156.25 kHz, wherein a quantity of tones per 10-MHz tone distribution corresponding to the second part of the fields is 128, and a tone spacing is 78.125 kHz, and wherein P is a positive integer greater than or equal to 1 and
wherein the first part of the fields comprises resource indication information, wherein the resource indication information is used to indicate resource unit RU allocation within a range of one or more 106-tone RUs, or the resource indication information is used to indicate RU allocation within a range of one or more 242-tone RUs.
10. The receive end according to claim 9 , wherein
each 10-MHz tone distribution corresponding to the second part of the fields comprises M1 26-tone resource units (RUs), M2 52-tone RUs, M3 106-tone RUs, M4 guard tones, M5 null tones, and M6 direct current tones, wherein M1×26+M2×52+M3×106+M4+M5+M6=128, and wherein M1, M2, M3, M4, M5, and M6 are integers greater than or equal to 0.
11. The receive end according to claim 10 , wherein
M1=4, M2=0, M3=0, and M4+M5+M6=24; M41 guard tones and M42 guard tones are provided on two sides of the four 26-tone RUs, and M41+M42=M4,
M1=0, M2=2, M3=0, and M4+M5+M6=24; M43 guard tones and M44 guard tones are provided on two sides of the two 52-tone RUs, and M43+M44=M4,
M1=0, M2=0, M3=1, and M4+M5+M6=22; M45 guard tones and M46 guard tones are provided on two sides of the two 52-tone RUs, and M45+M46=M4, or
M1=2, M2=1, M3=0, and M4+M5+M6=24; M47 guard tones and M48 guard tones are provided on two sides of the two 26-tone RUs and the one 52-tone RU, and M47+M48=M4.
12. The receive end according to claim 11 , wherein
M1=2, M2=0, M3=0, M41=9, M42=8, M5=2, and M6=5,
M1=0, M2=2, M3=0, M43=9, M44=8, M5=2, and M6=5,
M1=0, M2=0, M3=1, M45=9, M46=8, M5=0, and M6=5, or
M1=2, M2=1, M3=0, M47=9, M48=8, M5=2, and M6=5.
13. The receive end according to claim 12 , wherein
when M41=9 and M42=8, M41 guard tones fall within a range of [−64, −56] and M42 guard tones fall within a range of [56, 63]; or M41 guard tones fall within the range of [56, 63] and M42 guard tones fall within the range of [−64, −56];
when M43=9 and M44=8, M43 guard tones fall within the range of [−64, −56] and M44 guard tones fall within the range of [56, 63]; or M43 guard tones fall within the range of [56, 63] and M44 guard tones fall within the range of [−64, −56];
when M45=9 and M46=8, M45 guard tones fall within the range of [−64, −56] and M46 guard tones fall within the range of [56, 63]; or M45 guard tones fall within the range of [56, 63] and M46 guard tones fall within the range of [−64, −56]; and
when M47=9 and M48=8, M47 guard tones fall within the range of [−64, −56] and M48 guard tones fall within the range of [56, 63]; or M47 guard tones fall within the range of [56, 63] and M48 guard tones fall within the range of [−64, −56].
14. The receive end according to claim 9 , wherein
when the resource indication information is used to indicate the RU allocation within a range of one or more 242-tone RUs, for RU allocation within a range of any 242-tone RU, the resource indication information comprises:
a first resource indication subfield used to indicate an RU allocation status on a first 106-tone RU in the 242-tone RU,
a second resource indication subfield used to indicate an RU allocation status on a second 106-tone RU in the 242-tone RU, and
a third resource indication subfield used to indicate an allocation status on a 26-tone RU between the first 106-tone RU and the second 106-tone RU.
15. The receive end according to claim 9 , wherein the resource indication information is replicated on two 10-MHz bandwidths corresponding to the 242-tone RU.
16. The receive end according to claim 9 , wherein the first part of the fields comprises a legacy-long training field (L-LTF), the second part of the fields comprises a training field, and the training field and the L-LTF are jointly used for channel measurement in a space time block coding (STBC) scenario, wherein
the training field occupies one symbol, the L-LTF is multiplied by a first column of a matrix P 2*2 ; and the training field is multiplied by a second column of the matrix P 2*2 ; and the matrix P is used to distinguish between a first space-time stream and a second space-time stream, wherein
P
2
*
2
=
[
1
-
1
1
1
]
.