Communication device, communication method thereof, information processing device, control method thereof, and computer-readable storage medium

1. A communication device that transmits or receives a radio frame including a preamble and a data field of a physical layer (PHY),

wherein the preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-STF (EHT (Extremely High Throughput) Short Training Field), and an EHT-LTF (EHT Long Training Field),

wherein a second Signal Field is placed between the L-SIG and the EHT-STF in the preamble, and the second Signal Field includes a sub-field indicating a version of a standard that the radio frame complies with,

wherein the sub-field is a sub-field in which a single value included in a plurality of values can be designated, wherein one of the plurality of values that can be designated in the sub-field includes a value indicative of IEEE (Institute of Electrical and Electronics Engineers) 802.11EHT, and

wherein a predetermined number of bits in a head of the second Signal Field are allocated as the sub-field.

2. The communication device according to claim 1 , wherein the predetermined number is three.

3. The communication device according to claim 1 , wherein in a case where the radio frame including the sub-field indicating a standard to which the communication device is not adaptable is received, the communication device discards the radio frame.

4. The communication device according to claim 1 , wherein if the radio frame including a field indicating a standard to which the communication device is adaptable is received, the communication device decodes whole of the received radio frame.

5. The communication device according to claim 1 , wherein the sub-field stores a value indicating a version of the standard that the radio frame complies with.

6. The communication device according to claim 1 , wherein the second Signal Field is a field in which a control signal related to an IEEE802.11EHT standard or a standard after the IEEE802.11EHT standard is stored, and

in a case where the communication device supports the IEEE802.11EHT standard, the communication device transmits, to an external communication device that supports the IEEE802.11 be standard, a radio frame in which 0 is stored in the sub-field.

7. The communication device according to claim 1 , the second Signal Field is a field in which a control signal related to an IEEE802.11EHT standard or a standard after the IEEE802.11EHT standard is stored, and

in a case where the communication device supports a successor standard after the IEEE802.11EHT standard, the communication device transmits, to an external communication device that supports the successor standard after the IEEE802.11 be standard, a radio frame in which 1 is stored in the sub-field.

8. The communication device according to claim 1 , wherein the second Signal Field includes a BSS color sub-field.

9. The communication device according to claim 8 , wherein the second Signal Field includes an UL/DL sub-field.

10. The communication device according to claim 1 , wherein the second Signal Field includes a sub-field indicating a modulation scheme of a third signal field related to EHT.

11. The communication device according to claim 1 , wherein in the preamble, another Signal Field is not included between the L-SIG and the second Signal Field.

12. An information processing device that generates a radio frame including a preamble and a data field of a physical layer (PHY),

wherein the preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-STF (EHT (Extremely High Throughput) Short Training Field), and an EHT-LTF (EHT Long Training Field),

wherein a second Signal Field is placed between the L-SIG and the EHT-STF in the preamble, and the second Signal Field includes a sub-field indicating a version of a standard that the radio frame complies with,

wherein the sub-field is a sub-field in which a single value included in a plurality of values can be designated, wherein one of the plurality of values that can be designated in the sub-field includes a value indicative of IEEE (Institute of Electrical and Electronics Engineers) 802.11EHT, and

wherein a predetermined number of bits in a head of the second Signal Field are allocated as the sub-field.

13. A communication method executed by a communication device, comprising

transmitting or receiving a radio frame including a preamble and a data field of a physical layer (PHY),

wherein the preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-STF (EHT (Extremely High Throughput) Short Training Field), and an EHT-LTF (EHT Long Training Field),

wherein a second Signal Field is placed between the L-SIG and the EHT-STF in the preamble, and the second Signal Field includes a sub-field indicating a version of a standard that the radio frame complies with,

wherein the sub-field is a sub-field in which a single value included in a plurality of values can be designated, wherein one of the plurality of values that can be designated in the sub-field includes a value indicative of IEEE (Institute of Electrical and Electronics Engineers) 802.11EHT, and

wherein a predetermined number of bits in a head of the second Signal Field are allocated as the sub-field.

14. A control method executed by an information processing device, comprising

generating a radio frame including a preamble and a data field of a physical layer (PHY),

wherein the preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-STF (EHT (Extremely High Throughput) Short Training Field), and an EHT-LTF (EHT Long Training Field),

wherein a second Signal Field is placed between the L-SIG and the EHT-STF in the preamble, and the second Signal Field includes a sub-field indicating a version of a standard that the radio frame complies with,

wherein the sub-field is a sub-field in which a single value included in a plurality of values can be designated, wherein one of the plurality of values that can be designated in the sub-field includes a value indicative of IEEE (Institute of Electrical and Electronics Engineers) 802.11EHT, and

wherein a predetermined number of bits in a head of the second Signal Field are allocated as the sub-field.

15. A non-transitory computer readable storage medium that stores a program for causing, when executed by a computer included in a communication device, the computer to:

transmit or receive a radio frame including a preamble and a data field of a physical layer (PHY),

wherein the preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-STF (EHT (Extremely High Throughput) Short Training Field), and an EHT-LTF (EHT Long Training Field),

wherein a second Signal Field is placed between the L-SIG and the EHT-STF in the preamble, and the second Signal Field includes a sub-field indicating a version of a standard that the radio frame complies with,

wherein the sub-field is a sub-field in which a single value included in a plurality of values can be designated, wherein one of the plurality of values that can be designated in the sub-field includes a value indicative of IEEE (Institute of Electrical and Electronics Engineers) 802.11EHT, and

wherein a predetermined number of bits in a head of the second Signal Field are allocated as the sub-field.

16. A non-transitory computer readable storage medium that stores a program for causing, when executed by a computer included in an information processing device, the computer to:

generate a radio frame including a preamble and a data field of a physical layer (PHY),

wherein the preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an EHT-STF (EHT (Extremely High Throughput) Short Training Field), and an EHT-LTF (EHT Long Training Field),

wherein a second Signal Field is placed between the L-SIG and the EHT-STF in the preamble, and the second Signal Field includes a sub-field indicating a version of a standard that the radio frame complies with,

wherein the sub-field is a sub-field in which a single value included in a plurality of values can be designated, wherein one of the plurality of values that can be designated in the sub-field includes a value indicative of IEEE (Institute of Electrical and Electronics Engineers) 802.11EHT, and

wherein a predetermined number of bits in a head of the second Signal Field are allocated as the sub-field.