Communication device and communication method for the same, information processing apparatus and control method for the same, and program

Abstract

To prevent, when a communication device receives a radio frame conforming to a standard not designed for the communication device, the communication device from unnecessarily continuing reading of the radio frame.SOLUTION: A communication device has generation means that generates a physical layer (PHY) frame including a preamble, and transmission means that transmits the PHY frame. The preamble includes a first signal field, a short training field (STF), and a long training field (LTF). The first signal field is arranged before the STF, and includes a field indicating the version of the PHY frame. The field is constituted of three bits, and when 0 is set to the field using the three bits, extremely high throughput (EHT) is indicated.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a communication control technique for a wireless LAN. [Background technology]

[0002] The Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard is known as a communication standard for wireless local area networks (wireless LANs). The IEEE 802.11ax standard, the latest standard in the IEEE 802.11 series, uses orthogonal frequency division multiple access (OFDMA) to achieve high peak throughput as well as improved communication speeds under congested conditions (see Patent Document 1).

[0003] Currently, a study group called IEEE802.11EHT (Extremely High Throughput) is being formed as a successor standard to IEEE802.11ax to further improve throughput. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-050133 Summary of the Invention [Problem to be solved by the invention]

[0005] Just as numerous standards have been established to date, it is expected that new standards will continue to emerge in the future. Meanwhile, communication devices that are compliant only with older generation standards must continue to read wireless frames compliant with newer standards until it becomes clear that the frames are of a standard that the device does not support, which increases power consumption.

[0006] The present invention provides a technique for preventing a communication device from unnecessarily continuing to read a wireless frame that conforms to a standard that the communication device does not support when the communication device receives the wireless frame. [Means for solving the problem]

[0007] A communication device according to one embodiment of the present invention has a communication means for transmitting or receiving a radio frame having a physical layer (PHY) preamble and a data field, 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-SIG-A (Extremely High Throughput Signal A Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), and the EHT-SIG-A includes a field indicating the standard to which the radio frame complies. [Effects of the Invention]

[0008] According to the present invention, when a communication device receives a wireless frame that complies with a standard that the communication device does not support, the communication device can be prevented from unnecessarily continuing to read the wireless frame. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 illustrates an example of a network configuration. [Figure 2] FIG. 2 illustrates an example of a functional configuration of a communication device. [Figure 3] FIG. 2 illustrates an example of a hardware configuration of a communication device. [Figure 4] FIG. 10 is a diagram illustrating an example of a flow of processing executed in a communication device. [Figure 5] FIG. 10 is a diagram illustrating an example of a PHY frame structure of an EHT SU PPDU. [Figure 6]FIG. 10 is a diagram illustrating an example of a PHY frame structure of an EHT ER PPDU. [Figure 7] FIG. 10 is a diagram illustrating an example of a PHY frame structure of an EHT MU PPDU. [Figure 8] FIG. 10 is a diagram illustrating an example of a PHY frame structure of an EHT TB PPDU. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the scope of the claimed invention. Although multiple features are described in the embodiments, not all of these multiple features are necessarily essential to the invention, and multiple features may be combined arbitrarily. Furthermore, in the accompanying drawings, the same reference numerals are used to designate the same or similar components, and redundant explanations will be omitted.

[0011] (Network configuration) FIG. 1 shows an example of the configuration of a wireless communication network according to this embodiment. This wireless communication network includes one access point (AP) and three stations (STAs). AP 102 and STA 103 are compliant with IEEE 802.11EHT (Extremely High Throughput) and are configured to be able to perform wireless communication compliant with standards established before the IEEE 802.11EHT standard. STA 104 is compliant with the IEEE 802.11ax standard but not IEEE 802.11EHT. STA 105 is compliant with a communication standard later than IEEE 802.11EHT. The name IEEE 802.11EHT is used for convenience and may be changed once the standard is finalized. However, this specification and the appended claims are intended to cover all standards that can support the processing described below. Hereinafter, when a specific device is not being referred to, an access point may be referred to as an "AP" and a station (terminal) may be referred to as an "STA" without a reference number. While FIG. 1 shows a wireless communication network including one AP and three STAs as an example, the number of these communication devices may be more or less than that shown. In one example, when STAs communicate with each other, an AP may not be present. In FIG. 1, the communication range of the network formed by AP 102 is indicated by circle 101. This communication range may cover a wider range or may cover only a narrower range. EHT may also be interpreted as an acronym for Extreme High Throughput.

[0012] (Device configuration) 2 shows an example of the hardware configuration of a communication device (AP and STA). The communication device includes, as an example of the hardware configuration, a storage unit 201, a control unit 202, a function unit 203, an input unit 204, an output unit 205, a communication unit 206, and an antenna 207.

[0013] The storage unit 201 is configured with a ROM and / or a RAM, and stores various information such as programs for performing various operations described below and communication parameters for wireless communication. Note that, in addition to memories such as a ROM and a RAM, the storage unit 201 may also use storage media such as a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a non-volatile memory card, or a DVD.

[0014] The control unit 202 is configured by, for example, one or more processors such as a CPU or MPU, an ASIC (Application Specific Integrated Circuit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), etc. Here, CPU is an acronym for Central Processing Unit, and MPU is an acronym for Micro Processing Unit. The control unit 202 controls the entire device by executing programs stored in the storage unit 201. Note that the control unit 202 may also control the entire device in cooperation with the programs stored in the storage unit 201 and an OS (Operating System).

[0015] Furthermore, the control unit 202 controls the functional unit 203 to perform predetermined processing such as capturing images, printing, and projection. The functional unit 203 is hardware that enables the device to perform predetermined processing. For example, if the device is a camera, the functional unit 203 is an imaging unit that performs imaging processing. For example, if the device is a printer, the functional unit 203 is a printing unit that performs printing processing. For example, if the device is a projector, the functional unit 203 is a projection unit that performs projection processing. The data processed by the functional unit 203 may be data stored in the storage unit 201, or may be data communicated with other APs or STAs via the communication unit 206, which will be described later.

[0016] The input unit 204 receives various operations from the user. The output unit 205 outputs various types of information to the user. Here, the output by the output unit 205 includes, for example, at least one of display on a screen, audio output by a speaker, vibration output, etc. Note that both the input unit 204 and the output unit 205 may be implemented by a single module, such as a touch panel.

[0017] The communication unit 206 controls wireless communication compliant with the IEEE 802.11 standard series and IP communication. The communication unit 206 is a so-called wireless chip and may itself include one or more processors and memories. In this embodiment, the communication unit 206 can execute processing compliant with at least the IEEE 802.11ax standard. The communication unit 206 also controls the antenna 207 to transmit and receive wireless signals for wireless communication. The device communicates content such as image data, document data, and video data with other communication devices via the communication unit 206. The antenna 207 is an antenna capable of transmitting and receiving at least one of the sub-GHz band, the 2.4 GHz band, the 5 GHz band, and the 6 GHz band. Note that the frequency bands (and their combinations) supported by the antenna 207 are not particularly limited. The antenna 207 may be a single antenna or a set of two or more antennas for MIMO (Multi-Input and Multi-Output) transmission and reception. Although one antenna 207 is shown in FIG. 2, two or more antennas (two or more sets) each capable of handling a different frequency band may be included.

[0018] 3 shows an example of the functional configuration of a communication device (AP and STA). The communication device includes, for example, a wireless LAN control unit 301, a frame analysis unit 302, a frame generation unit 303, a UI control unit 304, a storage unit 305, and an antenna 306.

[0019] The wireless LAN control unit 301 includes circuits for transmitting and receiving wireless signals to and from other wireless LAN devices (e.g., other APs or STAs) using an antenna 306, and programs for controlling these circuits. The wireless LAN control unit 301 performs wireless LAN communication control, such as transmitting frames generated by the frame generation unit 303 and receiving wireless frames from other wireless LAN devices, in accordance with the IEEE 802.11 standard series. The frame analysis unit 302 analyzes wireless frames received via the wireless LAN control unit 301. This analysis is performed by reading the wireless frames from the beginning. Note that, as described below, the frame analysis unit 302 can analyze the physical layer (PHY) preamble of the wireless frame to discard wireless frames of a standard (version) to which the communication device does not conform. This allows the communication device to quickly stop analyzing wireless frames of a type to which the communication device does not conform, thereby reducing power consumption. The frame generation unit 303 generates wireless frames containing data to be transmitted to, for example, other APs or STAs. The frame generation unit 303 generates a wireless frame conforming to a standard that enables communication between the communication device and the other device, according to the standard conforming to the communication device itself and, in some cases, the standard conforming to the other device. For example, if the communication device conforms to IEEE802.11EHT and the other device conforms to IEEE802.11ax, a wireless frame conforming to IEEE802.11ax is generated and transmitted / received. The UI control unit 304 includes hardware related to a user interface (UI), such as a touch panel or buttons, for accepting operations on the communication device by a user (not shown), and a program for controlling the hardware. The UI control unit 304 also has a function for presenting information to the user, such as displaying images or outputting audio. The storage unit 305 includes a storage device, such as a read-only memory (ROM) or a random access memory (RAM), for storing programs executed by the communication device and various data.

[0020] (Processing flow) Next, a flow of processing executed by the above-described communication device will be described. FIG. 4 shows an example of the flow of processing executed by communication devices (AP and STA) conforming to IEEE802.11EHT according to this embodiment. First, the communication device determines an operating frequency band (S401). This determination of the operating frequency band is performed by the AP. That is, if the communication device is an AP, the operating frequency band is determined by a user operation of the communication device, etc., and if the communication device is an STA, it is determined that the communication device will operate in the operating frequency band determined by the AP to which it is connected. The operating frequency band may be, for example, any of 2.4 GHz, 5 GHz, and 6 GHz. However, if there is another usable frequency band, that frequency band may also be used. In the following, it is assumed that the 2.4 GHz or 5 GHz frequency band, which can also be used by communication devices conforming to older generation communication standards, is used.

[0021] Thereafter, when transmitting a wireless frame, the communication device determines a standard to which the wireless frame should conform. In this processing example, the communication device determines whether the standard is IEEE 802.11 EHT (S402). The communication device determines the communication standard to use, for example, based on the standard to which the communication device conforms and the standard to which the remote device conforms. For example, if both the communication device and the remote device conform to IEEE 802.11 EHT, the communication device determines to use IEEE 802.11 EHT. Also, if one of the communication device and the remote device conforms to a successor standard to IEEE 802.11 EHT and the other conforms to IEEE 802.11 EHT but not to the successor standard, the communication device also determines to use IEEE 802.11 EHT. Also, if one of the communication device and the remote device conforms to IEEE 802.11 EHT but the other conforms only to an older generation standard, the communication device determines to use the older generation standard. For example, in communication between AP 102 and STA 103, both AP 102 and STA 103 are compliant with IEEE 802.11EHT, so it is determined that IEEE 802.11EHT is to be used. Furthermore, in communication between AP 102 and STA 104, AP 102 is compliant with IEEE 802.11EHT, but STA 104 is only compliant with IEEE 802.11ax, so it is determined that IEEE 802.11ax is to be used. Furthermore, in communication between AP 102 and STA 105, STA 105 is compliant with a successor standard to IEEE 802.11EHT, but AP 102 is not compliant with that successor standard, so it is determined that IEEE 802.11EHT is to be used. Note that the "successor standard" here includes, for example, Wave 2 of IEEE 802.11EHT. In other words, in this embodiment, different versions of IEEE 802.11EHT that have been further improved after the establishment of the IEEE 802.11EHT standard using the wireless frame discussed below are also treated as successor standards.

[0022] When the communication device determines to use IEEE 802.11 EHT (YES in S402), it sets a field indicating the type of standard (e.g., a Version subfield, described later) in the wireless frame and sets a value indicating EHT in that field (S403). When the communication device determines to use a standard later than IEEE 802.11 EHT, it may prepare a field indicating the type of standard and set a value indicating the standard to be used in that field. In this case, the communication device determines in S402 whether a standard later than IEEE 802.11 EHT is used, and if a standard later than IEEE 802.11 EHT is used, it may set an appropriate value in the field indicating the type of standard. Then, the communication device generates a wireless frame (PPDU) including a field indicating the type of standard. PPDU is an acronym for Physical Layer (PHY) Protocol Data Unit. On the other hand, when the communication device determines to use an older-generation standard (legacy standard) earlier than IEEE 802.11 EHT (NO in S402), it generates a wireless frame (PPDU) in accordance with the older-generation standard. The communication device then transmits the generated wireless frame (S404). Note that the transmission of wireless frames here also includes the transmission of Beacons. That is, when the communication device is an AP, the communication device generates and transmits Beacons in accordance with the communication standard to which the communication device conforms. Note that the communication device may omit the processes of S402 to S404 when the communication device does not transmit wireless frames but only receives wireless frames from a partner device.

[0023] Next, the processing at the time of signal reception will be described. The communication device receives a wireless frame from a partner device (S405). Note that the partner device here refers to a partner device with which direct wireless communication is performed. For example, if the communication device is a STA, the partner device is the connected AP, and if the communication device is an AP, the partner device is the connected STA. The communication device determines whether the received wireless frame is a wireless frame of a legacy standard (S406). Here, the legacy standard refers to the IEEE 802.11a / b / g / n / ax standard. If the communication device determines that it has received a wireless frame of a legacy standard (YES in S406), it reads the entire wireless frame (S407). On the other hand, if the communication device determines that it has received a wireless frame of a standard later than the IEEE 802.11ax standard, i.e., a standard later than IEEE 802.11EHT (NO in S406), it reads the field indicating the type of standard as described above (S408). The communication device then determines whether it supports the type of standard indicated by the value set in the read field (whether it can operate in compliance with that standard) (S409). For example, a communication device that complies with IEEE 802.11 EHT determines whether the value set in that field corresponds to IEEE 802.11 EHT. If the communication device supports the type of standard of the wireless frame (YES in S409), the communication device continues analyzing the wireless frame and reads the entire wireless frame (S410). After finishing reading the wireless frame, the communication device continues analyzing the data stored in the data field as a frame of the MAC (medium access control) layer. On the other hand, if the communication device does not support the type of standard of the wireless frame (NO in S409), the communication device discards the wireless frame without analyzing the wireless frame thereafter (S411). This prevents the communication device from unnecessarily continuing to read wireless frames of a standard that it does not support, thereby preventing waste of power consumption by the communication device. If the communication device only transmits wireless frames and does not receive wireless frames, the processing from S405 onwards may be omitted.

[0024] In FIG. 4, as an example, an AP generates and transmits a Beacon frame including information indicating the standard to which the AP conforms. The STA then transmits a Probe Request frame based on the Beacon frame. The AP then determines whether the Probe Request frame is a legacy frame, and if not, whether it was generated in accordance with a standard supported by the AP. If the Probe Request frame is a legacy frame or a frame generated in accordance with a standard supported by the AP, the AP performs analysis at the MAC layer. The AP recognizes that the frame is a Probe Request frame through this analysis at the MAC layer and can transmit a Probe Response frame. On the other hand, if the Probe Request frame is generated in accordance with a standard not supported by the AP, the AP discards the frame. Because the AP discards the frame without analyzing it at the MAC layer, it does not recognize that the frame is a Probe Request frame. Therefore, the AP does not transmit a Probe Response frame. In this way, the communication device may execute the signal transmission process of S402 to S404 and the signal reception process of S405 to S411 in separate communication opportunities, or may execute these processes as a series of processes in one communication opportunity.

[0025] Here, examples of the configuration of a wireless frame conforming to IEEE802.11EHT are shown in Figures 5 to 8. Figure 5 shows an example of an EHT SU (Single User) PPDU for single-user communication, and Figure 6 shows an example of an EHT MU (Multi User) PPDU for multi-user communication. Figure 7 shows an example of an EHT ER (Extended Range) PPDU for long-distance transmission, and Figure 8 shows an example of an EHT TB (Trigger Based) PPDU transmitted from a STA in response to a trigger frame transmitted from an AP. The EHT ER PPDU is used when the communication range needs to be extended in communication between an AP and a single STA.

[0026] The PPDU includes the following fields: a Short Training Field (STF), a Long Training Field (LTF), and a Signal Field (SIG). As shown in Fig. 5, the beginning of the PPDU includes an L (Legacy)-STF 501, an L-LTF 502, and an L-SIG 503 to ensure backward compatibility with the IEEE 802.11a / b / g / n / ax standards. The frame formats of Figs. 6 to 8 also include L-STF (L-STF 601, 701, 801), L-LTF (L-LTF 602, 702, 802), and L-SIG (L-SIG 603, 703, 803). The L-LTF is placed immediately after the L-STF, and the L-SIG is placed immediately after the L-LTF. 6 to 8 further include an RL-SIG (Repeated L-SIG, RL-SIG504, 604, 704, 804) placed immediately after the L-SIG. The RL-SIG field repeatedly transmits the contents of the L-SIG. The RL-SIG allows the receiver to recognize that the PPDU is compliant with the IEEE802.11ax standard or later, and may be omitted in IEEE802.11EHT in some cases. Alternatively, a field may be provided in place of the RL-SIG to allow the receiver to recognize that the PPDU is an IEEE802.11EHT PPDU.

[0027] L-STF is used for detecting PHY frame signals, automatic gain control (AGC), timing detection, etc. L-LTF is used for high-precision frequency and time synchronization and for acquiring channel state information (CSI). L-SIG is used to transmit control information including data transmission rate and PHY frame length information. Legacy devices that comply with the IEEE802.11a / b / g / n / ax standards can decode the various legacy fields mentioned above.

[0028] Each PPDU further includes an EHT-SIG (EHT-SIG-A 505, 605, 705, 805, and EHT-SIG-B 606) for transmitting EHT control information, which is placed immediately after the RL-SIG. Each PPDU also includes an STF for EHT (EHT-STF 506, 607, 706, 806) and an LTF for EHT (EHT-LTF 507, 608, 707, 807). Each PPDU has data fields 508, 609, 708, 808 and packet extension fields 509, 610, 709, 809 after these control fields. The fields from the L-STF to the EHT-LTF of each PPDU are called a PHY preamble. Note that the fields of the PPDU do not necessarily have to be arranged in the order shown in FIGS. 5 to 8, and the PPDU may include new fields not shown in FIGS. 5 to 8.

[0029] 5 to 8 show, as an example, a PPDU that can ensure backward compatibility, but if it is not necessary to ensure backward compatibility, for example, the legacy field may be omitted. In this case, for example, EHT-STF or EHT-LTF is used instead of L-STF and L-LTF to establish synchronization. In this case, the EHT-STF after the EHT-SIG field or one of multiple EHT-LTFs may be omitted.

[0030] EHT-SIG-A505 and EHT-SIG-A705 included in the EHT SU PPDU and EHT ER PPDU contain EHT-SIG-A1 and EHT-SIG-A2 required for PPDU reception, as shown in Tables 1 and 2 below. Furthermore, EHT-SIG-A605 of the EHT MU PPDU in FIG. 6 contains EHT-SIG-A1 and EHT-SIG-A2 required for PPDU reception, as shown in Tables 3 and 4 below. Furthermore, EHT-SIG-A805 of the EHT TB PPDU in FIG. 8 contains EHT-SIG-A1 and EHT-SIG-A2 required for PPDU reception, as shown in Tables 5 and 6 below. In this embodiment, in any frame configuration, a "Version" subfield indicating the standard according to which the radio frame is generated is included in the first 3 bits of EHT-SIG-A1.

[0031] [Table 1]

[0032] [Table 2]

[0033] [Table 3]

[0034] [Table 4]

[0035] [Table 5]

[0036] [Table 6]

[0037] For example, when a wireless frame is generated in accordance with the IEEE 802.11 EHT standard, 0 is stored in this "Version" subfield. When a wireless frame is generated in accordance with a standard that immediately succeeds the IEEE 802.11 EHT standard or a standard whose subsequent version has been modified, 1 is stored in this "Version" subfield. Similarly, as the number of standards increases, different values ​​such as 2, 3, ..., 7 are specified as the value to be set in the Version subfield corresponding to each standard. As shown in Tables 1 to 6 above, by using a predetermined number of bits at the beginning of the EHT-SIG-A as the Version subfield, a communication device can quickly determine whether or not it supports the standard to which the wireless frame conforms. As a result, the communication device can quickly end reading (decoding process) a wireless frame generated in accordance with a standard that the communication device does not support, thereby reducing power consumption related to reading the wireless frame.

[0038] In the examples of Tables 1 to 6, the Version subfield is defined as a 3-bit field, but this is not limited to this. For example, a 4-bit or more or 2-bit or less field may be provided as the Version subfield. Furthermore, this Version information may be notified at a position other than the 0th to 2nd bits of the EHT-SIG-A1 field. Furthermore, in the examples of Tables 1 to 6, an example in which the Version subfield is provided in the EHT-SIG-A1 is shown, but this subfield may be provided in another location. For example, an additional signal field may be provided before the above-mentioned EHT-SIG-A (e.g., immediately after the L-LTF field or the L-SIG field), and a new Version subfield may be included in that field. In one example, the new field may be placed before the RL-SIG field. This makes it possible to determine the type of standard of the frame at an earlier stage, eliminating the need to analyze subsequent frames. This reduces the calculation time and power consumption required for analyzing the frame.

[0039] Although the above description has been given of a wireless frame of IEEE802.11EHT, a similar configuration can also be adopted in successor standards to IEEE802.11EHT. That is, for example, a configuration in which a predetermined number of bits in a position corresponding to the field corresponding to the above-mentioned EHT-SIG-A store information indicating the type (version) of the standard can also be adopted in wireless frames corresponding to new communication standards. Similarly, a configuration in which a new field in which information indicating the type of standard is set is provided after the L-SIG (or RL-SIG) can be adopted in wireless frames corresponding to new communication standards. In this way, when a communication device receives a wireless frame, it can proceed with decoding the wireless frame up to the information indicating the type of standard, and then discard the wireless frame based on the fact that the wireless frame was generated according to a standard that the communication device does not support. Note that the present invention can also be implemented by an information processing device (e.g., a wireless chip) that generates the above-mentioned PHY preamble, in addition to the communication device AP 102 or STAs 103 to 105.

[0040] <<Other embodiments>> The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and having one or more processors in the computer of the system or device read and execute the program. It can also be realized by a circuit (e.g., ASIC) that realizes one or more functions.

[0041] The invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention. Accordingly, the following claims are appended to apprise the public of the scope of the invention. [Explanation of symbols]

[0042] 102: AP, 103 to 105: STA, 301: Wireless LAN control unit, 302: Frame analysis unit, 303: Frame generation unit, 304: UI control unit, 305: Storage unit

Claims

1. A communication means for transmitting or receiving a radio frame having a physical layer (PHY) preamble and a data field, 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-SIG-A (Extremely High Throughput Signal A Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), The EHT-SIG-A includes a field indicating a standard to which the radio frame conforms. A communication device comprising:

2. 2. The communication device according to claim 1, wherein a predetermined number of leading bits of said EHT-SIG-A are allocated to said field.

3. A communication means for transmitting or receiving a radio frame having a physical layer (PHY) preamble and a data field, The preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), a field indicating a standard to which the wireless frame conforms, an EHT-SIG-A (Extremely High Throughput Signal A Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field). A communication device comprising:

4. 4. The communication device according to claim 1, wherein, when the communication means receives the wireless frame including the field indicating a standard that the communication device does not support, the communication means discards the wireless frame based on decoding of the field.

5. 5. The communication device according to claim 1, wherein when the communication means receives the wireless frame including the field indicating the standard supported by the communication device, the communication means decodes the entire wireless frame.

6. 6. The communication device according to claim 1, wherein the field contains information about a version of a standard to which the radio frame conforms.

7. generating means for generating a radio frame having a physical layer (PHY) preamble and a data field; 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-SIG-A (Extremely High Throughput Signal A Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), The EHT-SIG-A includes a field indicating a standard to which the radio frame conforms.

1. An information processing device comprising:

8. generating means for generating a radio frame having a physical layer (PHY) preamble and a data field; The preamble includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), a field indicating the standard to which the wireless frame conforms, an Extremely High Throughput Signal A Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF).

1. An information processing device comprising:

9. 1. A communication method performed by a communication device, comprising: A communication method comprising: transmitting or receiving a radio frame having a physical layer (PHY) preamble and a data field; 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-SIG-A (Extremely High Throughput Signal A Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), The EHT-SIG-A includes a field indicating a standard to which the radio frame conforms. A communication method comprising:

10. 1. A communication method performed by a communication device, comprising: A communication method comprising: transmitting or receiving a radio frame having a physical layer (PHY) preamble and a data field; The preamble includes an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), a field indicating a standard to which the wireless frame conforms, an EHT-SIG-A (Extremely High Throughput Signal A Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field). A communication method comprising:

11. A control method executed by an information processing device, comprising: generating a radio frame having a physical layer (PHY) preamble and a data field; 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-SIG-A (Extremely High Throughput Signal A Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), The EHT-SIG-A includes a field indicating a standard to which the radio frame conforms. A control method comprising:

12. A control method executed by an information processing device, comprising: generating a radio frame having a physical layer (PHY) preamble and a data field; The preamble includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), a field indicating the standard to which the wireless frame conforms, an Extremely High Throughput Signal A Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF). A control method comprising:

13. A program for causing a computer to function as the communication device according to any one of claims 1 to 6 or the information processing device according to claim 7 or 8.

Images