Multi-resource-unit transmission indication method, and related device
Embodiments of this application disclose a multi-resource-unit transmission indication method, and a related device. The method includes: A first device generates an EHT TB PPDU, where the EHT TB PPDU includes a resource unit indication field, the resource unit indication field is used to indicate a first resource unit used by the first device to transmit the EHT TB PPDU, and the first resource unit is included in a resource unit allocated to the first device; and the first device sends the EHT TB PPDU to a second device. In the embodiments of this application, the RU used by the first device to actually transmit the EHT TB PPDU can be indicated. The technical solution provided in this application may be applied to an 802.11ax Wi-Fi system, an 802.11be Wi-Fi system, or the like.
1 . A multi-resource-unit transmission indication method, wherein the method comprises:
generating, by a first device, an extremely high throughput trigger-based physical layer protocol data unit (EHT TB PPDU), wherein the EHT TB PPDU comprises a resource unit indication field, the resource unit indication field indicates a first resource unit used by the first device to transmit the EHT TB PPDU, the first resource unit comprised in a second resource unit, and the second resource unit is one or more resource units allocated to the first device; and
sending, by the first device, the EHT TB PPDU to a second device by uplink.
2 . The method according to claim 1 , wherein the EHT TB PPDU comprises a universal signal (U-SIG) field, and the resource unit indication field is located in the U-SIG field of the EHT TB PPDU.
3 . The method according to claim 1 , wherein the EHT TB PPDU comprises a U-SIG, an extremely high throughput short training (EHT-STF) field, and an extremely high throughput signal (EHT-SIG) field, the resource unit indication field is located in the EHT-SIG field, and the EHT-SIG field is located between the U-SIG field and the EHT-STF field.
4 . The method according to claim 1 , wherein the EHT TB PPDU comprises an extremely high throughput long training (EHT-LTF) field, an extremely high throughput signal (EHT-SIG) field, and a data field, the resource unit indication field is located in the EHT-SIG field, and the EHT-SIG field is located between the EHT-LTF field and the data field.
5 . The method according to claim 1 , wherein before the generating, by a first device, the EHT TB PPDU, the method further comprises:
receiving, by the first device, a trigger frame sent by the second device, wherein the trigger frame comprises a common information field and a user information field that is the same as an association identifier of the first device, the user information field indicates the second resource unit, the common information field or the user information field comprises an indication field, and the indication field indicates that the first device is allowed to transmit the EHT TB PPDU in a part of the second resource unit.
6 . The method according to claim 1 , wherein the first device pre-stores an index table, and the index table indicates a correspondence between a value of the resource unit indication field and the first resource unit.
7 . The method according to claim 1 , wherein the first resource unit indicated by the resource unit indication field is any one of the following resource units:
a 26-subcarrier tone resource unit in an 80-MHz frequency band range;
a 52-tone resource unit in an 80-MHz frequency band range;
a 106-tone resource unit in an 80-MHz frequency band range;
a 242-tone resource unit in an 80-MHz frequency band range;
a 484-tone resource unit in an 80-MHz frequency band range; and
a 996-tone resource unit corresponding to an 80-MHz frequency band range.
8 . A communication apparatus, wherein the communication apparatus comprises a processor and a transmitter, wherein
the processor is configured to generate an EHT TB PPDU, wherein the EHT TB PPDU comprises a resource unit indication field, the resource unit indication field indicates a first resource unit used by the communication apparatus to transmit the EHT TB PPDU, the first resource unit comprised in a second resource unit, and the second resource unit is one or more resource units allocated to the communication apparatus; and
the transmitter is configured to send the EHT TB PPDU to a second device by uplink.
9 . The communication apparatus according to claim 8 , wherein the EHT TB PPDU comprises a U-SIG field, and the resource unit indication field is located in the U-SIG field of the EHT TB PPDU.
10 . The communication apparatus according to claim 8 , wherein the EHT TB PPDU comprises a U-SIG field, an EHT-STF field, and an EHT-SIG field, the resource unit indication field is located in the EHT-SIG field, and the EHT-SIG field is located between the U-SIG field and the EHT-STF field.
11 . The communication apparatus according to claim 8 , wherein the communication apparatus further comprises a memory, the memory stores an index table, and the index table indicates a correspondence between a value of the resource unit indication field and the first resource unit.
12 . The communication apparatus according to claim 8 , wherein the first resource unit indicated by the resource unit indication field is any one of the following resource units:
a 26-subcarrier tone resource unit in an 80-MHz frequency band range;
a 52-tone resource unit in an 80-MHz frequency band range;
a 106-tone resource unit in an 80-MHz frequency band range;
a 242-tone resource unit in an 80-MHz frequency band range;
a 484-tone resource unit in an 80-MHz frequency band range; and
a 996-tone resource unit corresponding to an 80-MHz frequency band range.
13 . The communication apparatus according to claim 12 , wherein the EHT TB PPDU further comprises a frequency band range indication field, the frequency band range indication field indicates a frequency position of the 80-MHz frequency band range in a bandwidth, and the 80-MHz frequency band range is any one of the following: primary 80 MHz, secondary 80 MHz, 80 MHz having a lower frequency in secondary 160 MHz, and 80 MHz having a higher frequency in the secondary 160 MHz.
14 . The communication apparatus according to claim 8 , wherein the first resource unit indicated by the resource unit indication field is a plurality of resource units corresponding to any one of the following combinations:
a combination of a 106-tone resource unit having a lowest frequency in a 20-MHz frequency band range in an 80-MHz frequency band range and a center 26-tone resource unit in the 20-MHz frequency band range;
a combination of a 106-tone resource unit having a highest frequency in a 20-MHz frequency band range in an 80-MHz frequency band range and a center 26-tone resource unit in the 20-MHz frequency band range;
a combination of a 52-tone resource unit having a second lowest frequency in a 20-MHz frequency band range in an 80-MHz frequency band range and a 26-tone resource unit that is on a same side with and adjacent to the 52-tone resource unit and that is in the 20-MHz frequency band range;
a combination of a 52-tone resource unit having a second lowest frequency in a 20-MHz frequency band range in an 80-MHz frequency band range and a center 26-tone resource unit in the 20-MHz frequency band range;
a combination of a 52-tone resource unit having a second highest frequency in a 20-MHz frequency band range in an 80-MHz frequency band range and a continuous 26-tone resource unit that is on a same side with the 52-tone resource unit and that is in the 20-MHz frequency band range;
a combination of a 52-tone resource unit having a second highest frequency in a 20-MHz frequency band range in an 80-MHz frequency band range and a center 26-tone resource unit in the 20-MHz frequency band range;
a combination of a 484-tone resource unit in an 80-MHz frequency band range and a 242-tone resource unit adjacent to the 484-tone resource unit;
a combination of a 484-tone resource unit in an 80-MHz frequency band range and a 242-tone resource unit that is not adjacent to the 484-tone resource unit;
a combination of two 242-tone resource units on two sides in an 80-MHz frequency band range;
a combination of a 996-tone resource unit corresponding to an 80-MHz frequency band range and a 484-tone resource unit that is in an 80-MHz frequency band range adjacent to the 996-tone resource unit and that is not adjacent to the 996-tone resource unit;
a combination of a 996-tone resource unit corresponding to an 80-MHz frequency band range, and a 484-tone resource unit and a 242-tone resource unit that are in an 80-MHz frequency band range adjacent to the 996-tone resource unit and that are not adjacent to the 996-tone resource unit;
a combination of a 996-tone resource unit corresponding to an 80-MHz frequency band range, and two 242-tone resource units in an 80-MHz frequency band range adjacent to the 996-tone resource unit; and
a combination of a 484-tone resource unit and a 242-tone resource unit in an 80-MHz frequency band range, and a 484-tone resource unit and a 242-tone resource unit in an 80-MHz frequency band range adjacent to the 80-MHz frequency band range.
15 . The communication apparatus according to claim 8 , wherein the first resource unit indicated by the resource unit indication field is a plurality of resource units corresponding to any one of the following combinations:
a combination of two 996-tone resource units in a 320-MHz frequency band range;
a combination of four 996-tone resource units in a 320-MHz frequency band range;
a combination of two 996-tone resource units having lowest frequencies and a 996-tone resource unit having a highest frequency in a 320-MHz frequency band range;
a combination of a 996-tone resource unit having a lowest frequency and two 996-tone resource units having highest frequencies in a 320-MHz frequency band range;
a combination of three 996-tone resource units having lowest frequencies in a 320-MHz frequency band range; and
a combination of three 996-tone resource units having highest frequencies in a 320-MHz frequency band range.
16 . The communication apparatus according to claim 8 , wherein the resource unit indication field comprises bits of a first preset length, and a position of one of the bits in the bits corresponds to a position of a unit channel in a total channel; and
when the one bit is a first value, the unit channel corresponding to the one bit is comprised in a channel corresponding to the first resource unit; and
when the one bit is a second value, the unit channel corresponding to the one bit is not comprised in a channel corresponding to the first resource unit.
17 . The communication apparatus according to claim 8 , wherein the resource unit indication field comprises bits of a second preset length, and a position of one of the bits in the bits corresponds to a position of a unit channel in a frequency band range corresponding to the second resource unit; and
when the one bit is a first value, the unit channel corresponding to the one bit is comprised in a channel corresponding to the first resource unit; and
when the one bit is a second value, the unit channel corresponding to the one bit is not comprised in a channel corresponding to the first resource unit.
18 . The communication apparatus according to claim 8 , wherein the resource unit indication field comprises bits of a third preset length, and a position of one of the bits in the bits corresponds to a position of a resource unit in the second resource unit; and
when the one bit is a first value, the resource unit corresponding to the one bit is comprised in the first resource unit; and
when the one bit is a second value, the resource unit corresponding to the one bit is not comprised in the first resource unit.
19 . A chip system, comprising at least one processor and an interface, wherein
the processor is configured to generate an EHT TB PPDU, wherein the EHT TB PPDU comprises a resource unit indication field, the resource unit indication field indicates a first resource unit used by a communication apparatus to transmit the EHT TB PPDU, the first resource unit comprised in a second resource unit, and the second resource unit is one or more resource units allocated to the communication apparatus; and
the interface is configured to send the EHT TB PPDU by uplink.