Measurement method and apparatus

Abstract

A measurement method and apparatus, applied to the wireless technical field. The present application supports IEEE protocols such as IEEE 802.11be / Wi-Fi 7 / EHT protocol, IEEE 802.11bn / UHR / Wi-Fi 8 protocol, integrated millimeter wave / IMMW protocol, IEEE 802.15 / UWB protocol, or IEEE 802.11bf / sensing protocol, or NearLink protocol. N PPDUs are exchanged between a first station and M second stations, wherein the N PPDUs satisfy the following constraint: the result of an operation of the number of sending beams and the number of repetitions of the sending beams is equal to the result of an operation of the number of receiving beams and the number of repetitions of the receiving beams; and the sending beams are beams used for sending the N PPDUs, and the receiving beams are beams used for receiving the N PPDUs. Thus, the flexibility of PPDU configuration is effectively improved.

Description

Measurement method and apparatus

[0001] The present application claims priority to the Chinese patent application No. 202411125205.2, filed on August 15, 2024, with the State Intellectual Property Office of China, and entitled "Measurement method and apparatus", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the wireless technical field, in particular to a measurement method and apparatus. BACKGROUND

[0003] The institute of electrical and electronics engineers (IEEE) 802.11bf is a new generation of wireless standard focusing on passive object (such as target does not carry any device) sensing. The 802.11bf standard includes two categories of standards, low frequency (such as below 7 gigahertz (sub7GHz), the implementation mainly relies on 802.11ac, 802.11ax, 802.11be, 802.11bn and next generation standards, etc.) and high frequency (such as greater than or equal to 60GHz, the implementation mainly relies on 802.11ad, 802.11ay and next generation standards, etc.).

[0004] For the next generation of millimeter wave, since the physical layer convergence procedure (PLCP) protocol data unit (PPDU) on the millimeter wave frequency band generally adopts directional transmission or reception, channel measurement or sensing, etc. can be performed within a certain angle range (even omnidirectionally). At this time, the measurement device needs to send PPDU in multiple directions. When multiple devices need to be coordinated to train or sense or measure, multiple devices need to be coordinated to send PPDU in multiple directions.

[0005] Therefore, how to configure the PPDU needs to be solved urgently. SUMMARY

[0006] Embodiments of the present application provide a measurement method and apparatus, which can improve the flexibility of PPDU configuration.

[0007] In a first aspect, an embodiment of the present application provides a measurement method, which is applied to a first station, the first station comprising a WLAN device (including a sensing device or a Wi-Fi device or a device involved in the Starlink alliance, etc.), or a chip, a functional module, a processing system or a communication component which can be arranged in the WLAN device. The method comprises:

[0008] The first station sends first information used to indicate at least one of a number of transmission beams or a number of reception beams; the first station sends second information used to indicate a repetition number of the transmission beams; the first station sends N PPDU to M second stations, an operation result of the number of transmission beams and the repetition number of the transmission beams is equal to an operation result of the number of reception beams and the repetition number of the reception beams, the transmission beams are beams used for sending the N PPDU, the reception beams are beams used for receiving the N PPDU, N is an integer greater than or equal to 1, and M is an integer greater than or equal to 1.

[0009] In an embodiment of the present application, each of the M second stations can receive the N PPDU. For example, the PPDU can be used for measurement. The measurement can include, but is not limited to, channel measurement, sensing measurement or beam training. For example, the N PPDU is used for sensing measurement or channel measurement, and N is greater than or equal to 1. For another example, the N PPDU is used for beam training, and N is greater than or equal to 2.

[0010] In an embodiment of the present application, the transceiving parties can perform measurement as long as the above conditions are met, so that the transceiving parties can flexibly adjust the transmission beam or the reception beam of a single PPDU, and improve the flexibility of PPDU configuration.

[0011] In a second aspect, an embodiment of the present application provides a measurement method, which is applied to a second station, the second station comprising a WLAN device (including a sensing device or a Wi-Fi device or a device involved in the Starlink alliance, etc.), or a chip, a functional module, a processing system or a communication component which can be arranged in the WLAN device. The method comprises:

[0012] The second station receives first information used to indicate at least one of a number of transmission beams or a number of reception beams; the second station receives second information used to indicate a repetition number of the transmission beams; and the second station receives N PPDU, an operation result of the number of reception beams and the repetition number of the reception beams is equal to an operation result of the number of transmission beams and the repetition number of the transmission beams, the transmission beams are beams used for sending the N PPDU, the reception beams are beams used for receiving the N PPDU, and N is an integer greater than or equal to 1.

[0013] The description of the second aspect can refer to the first aspect, which will not be described in detail here.

[0014] In a possible implementation of the first aspect or the second aspect, the product of the number of the transmission beams and the number of repetitions of the transmission beams is equal to the product of the number of the reception beams and the number of repetitions of the reception beams.

[0015] In a possible implementation of the first aspect or the second aspect, one sensing measurement interaction includes N PPDU, or one sensing measurement session includes N PPDU, or one group transmission includes N PPDU.

[0016] One sensing measurement session includes one or more sensing measurement interactions. Alternatively, one sensing measurement session includes one or more group transmissions, and one group transmission includes one or more sensing measurement interactions. Here, sensing measurement is taken as an example, and beam training or channel measurement can also have a similar process, which will not be listed one by one here.

[0017] In the embodiments of the present application, the PPDU in one sensing measurement interaction is the above-mentioned N PPDU, or the PPDU in one sensing measurement session is the above-mentioned N PPDU, or the PPDU in one group transmission is the above-mentioned N PPDU. Alternatively, the above-mentioned N PPDU is the PPDU in one sensing measurement interaction, or the above-mentioned N PPDU is the PPDU in one sensing measurement session, or the above-mentioned N PPDU is the PPDU in one group transmission. The PPDU in one sensing measurement interaction or the PPDU in one sensing measurement session or the N PPDU in one group transmission can be flexibly adjusted by the transceiver to the transmission beam or the reception beam of the single PPDU in one sensing measurement interaction or the transmission beam or the reception beam of the single PPDU in one sensing measurement session or the transmission beam or the reception beam of the single PPDU in one group transmission, thereby further improving the flexibility of PPDU configuration.

[0018] In a possible implementation of the first aspect or the second aspect, the first information is contained in a sensing measurement request frame.

[0019] As an example, the number of transmission beams indicated by the first information can be carried in a transmission beam list in the sensing measurement request frame, and the number of reception beams indicated by the first information can be carried in a reception beam list in the sensing measurement request frame. For example, the N PPDU is the PPDU in the sensing measurement session.

[0020] As another example, the first information can be carried in an interaction beam number field or an interaction transmit / receive (Tx / Rx) beam number field in the sensing measurement request frame; or, the indicated number of transmit beams can be carried in a transmit beam number field in the sensing measurement request frame, and the indicated number of receive beams by the first information can be carried in a receive beam number field in the sensing measurement request frame. The N PPDUs are PPDUs in the sensing measurement interaction.

[0021] In a possible implementation manner of the first aspect or the second aspect, the second information is included in a control frame of the PPDU, or the second information is included in the sensing measurement request frame.

[0022] The control frame can be transmitted in low frequency or high frequency. For example, the second information is included in a repetition (Rep) field in the control frame of each PPDU, and through the second information, the number of repetitions of the transmit beam for each sensing measurement interaction can be configured. The second information is included in a Rep field in the sensing measurement request frame, and through the second information, the number of repetitions of the transmit beam for the sensing measurement session can be configured, for example, the number of repetitions of the transmit beam in each sensing measurement interaction is the same.

[0023] In a third aspect, an embodiment of the present application provides a measurement method, which can be applied to a first station (i.e., a sensing transmitter), including a WLAN device (including a sensing device or a Wi-Fi device or a device involved in the Starlink alliance, etc.), or a chip, a functional module, a processing system or a communication component, etc. which can be arranged in the WLAN device. The method includes:

[0024] The first station generates a PPDU, which includes a synchronization field and one or more unit fields; the synchronization field includes M synchronization subfields, each of which corresponds to a second station; the unit field includes one or more first fields, the first field includes one or more second fields, the second field includes one or more long training fields (LTFs), and the first field corresponds to a transmit beam, and the number of second fields in the first field indicates the number of repetitions of the transmit beam; and the first station transmits the PPDU to the M second stations.

[0025] For example, the PPDU is used for measurement, and the measurement includes but is not limited to beam training or channel measurement or sensing measurement.

[0026] In the embodiments of the present application, the measurement in different directions is realized through the first field in the PPDU. The first station does not need to interval a time duration between different PPDUs when measuring in different directions, and the interval between PPDUs in different directions is omitted, thereby improving the measurement efficiency.

[0027] In a fourth aspect, the embodiments of the present application provide a measurement method. The method can be applied to a second station (i.e., a sensing receiving end), which includes a WLAN device (including a sensing device or a Wi-Fi device or a device involved in the Starlink alliance, etc.), or a chip, a functional module, a processing system or a communication component, etc. which can be arranged in the WLAN device. The method includes:

[0028] The station receives a PPDU, which includes a synchronization field and one or more unit fields; the synchronization field includes M synchronization subfields, each of which corresponds to a second station, and the station is one of the M second stations; the unit field includes one or more first fields, the first field includes one or more second fields, and the second field includes one or more long training fields (LTF); the first field corresponds to a transmission beam, and the number of second fields in the first field represents the number of repetitions of the transmission beam; and the PPDU is parsed.

[0029] The description of the fourth aspect can refer to the third aspect, which will not be described in detail here.

[0030] In combination with the third aspect or the fourth aspect, in a possible implementation, the unit field further includes M third fields, each of which corresponds to a second station.

[0031] In the embodiments of the present application, the third field can be used for at least one of the following: time-frequency synchronization, phase tracking, automatic gain control (AGC) adjustment.

[0032] In combination with the third aspect or the fourth aspect, in a possible implementation, the unit field includes at least two first fields, and the at least two first fields correspond to different transmission beams respectively.

[0033] That is, each first field in the unit field can correspond to a transmission beam, and the transmission beams corresponding to different first fields are different. In this way, the efficiency of beam training or channel measurement or sensing measurement through the PPDU can be further improved.

[0034] In combination with the third aspect or the fourth aspect, in a possible implementation, the PPDU includes at least two unit fields, and each unit field corresponds to a transmission beam respectively.

[0035] Each unit field corresponds to one transmit beam, such as each unit field can correspond to different transmit beams, and such as two unit fields in the PPDU correspond to one same transmit beam, or three unit fields correspond to one same transmit beam.

[0036] With reference to the third aspect or the fourth aspect, in a possible implementation, at least two unit fields in the PPDU correspond to one same transmit beam.

[0037] In the embodiments of the present application, each unit field in the PPDU can correspond to one same transmit beam. Thus, the same transmit beam can be kept across multiple unit fields, so that the second station can switch more beams.

[0038] With reference to the third aspect or the fourth aspect, in a possible implementation, the physical layer header in the PPDU includes indication information, or the control frame of the PPDU includes indication information, and the indication information is used to indicate the structure of the PPDU.

[0039] For example, the physical layer header of the PPDU includes a signal (SIG) field or a header field in the PPDU.

[0040] With reference to the third aspect or the fourth aspect, in a possible implementation, the indication information is used to indicate the structure of the PPDU, including:

[0041] The indication information is used to indicate at least one of the following: the order of the second station corresponding to the M synchronization subfields; the value of M; the number of unit fields in the PPDU; the number of first fields in the unit field; the number of second fields in the first field; or the number of LTF symbols in the LTF field in the second field.

[0042] With reference to the third aspect or the fourth aspect, in a possible implementation, the indication information is further used to indicate at least one of the following: whether the unit field includes M third fields, or the number of symbols in each third field in the M third fields, and the number of symbols is greater than or equal to 0.

[0043] With reference to the third aspect or the fourth aspect, in a possible implementation, the indication information is used to indicate the structure of the PPDU, including:

[0044] The indication information is used to indicate any one of the following: at least two first fields in the unit field in the PPDU correspond to different transmit beams; each unit field in the PPDU corresponds to one transmit beam; or at least two unit fields in the PPDU correspond to one same transmit beam.

[0045] In a fifth aspect, an embodiment of the present application provides a communication apparatus, which is configured to execute the method in any of the first aspect to the fourth aspect or any possible implementation of the method.

[0046] In a sixth aspect, an embodiment of the present application provides a communication apparatus, which comprises a processor and a transceiver. The processor is configured to execute the processing steps in the method in any of the first aspect to the fourth aspect or any possible implementation of the method. The transceiver is configured to execute the transceiving steps in the method in any of the first aspect to the fourth aspect or any possible implementation of the method.

[0047] In a seventh aspect, an embodiment of the present application provides a chip, which comprises a logic circuit and an interface. The logic circuit and the interface are coupled to enable the method in any of the first aspect to the fourth aspect or any possible implementation of the method to be executed by the chip.

[0048] In an eighth aspect, an embodiment of the present application provides a computer readable storage medium, which is configured to store a computer program. When the computer program is executed on a computer, the method in any of the first aspect to the fourth aspect or any possible implementation of the method is executed.

[0049] In a ninth aspect, an embodiment of the present application provides a computer program product, which is configured to execute the method in any of the first aspect to the fourth aspect or any possible implementation of the method when the computer program product is executed on a computer.

[0050] In a tenth aspect, an embodiment of the present application provides a communication system, which comprises a first station and a second station. The first station is configured to execute the method in the first aspect or any possible implementation of the first aspect. The second station is configured to execute the method in the second aspect or any possible implementation of the second aspect.

[0051] In an eleventh aspect, an embodiment of the present application provides a communication system, which comprises a first station and a second station. The first station is configured to execute the method in the third aspect or any possible implementation of the third aspect. The second station is configured to execute the method in the fourth aspect or any possible implementation of the fourth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0052] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0053] FIG. 2 is a schematic diagram of a flow of a sensing measurement method according to an embodiment of the present application;

[0054] FIG. 3a is a format diagram of a sensing scheduling subelement in a sensing measurement request frame according to an embodiment of the present application;

[0055] FIG. 3b is a format diagram of a sensing scheduling subelement in a sensing measurement request frame according to an embodiment of the present application;

[0056] FIG. 4 is a format diagram of TDD beamforming information in a directional multi-gigabit (DMG) sensing request frame according to an embodiment of the present application;

[0057] FIG. 5 is a scenario diagram of a sensing measurement method according to the prior art;

[0058] FIG. 6 is another flow diagram of a measurement method according to an embodiment of the present application;

[0059] FIG. 7 is a format diagram of a unit field according to an embodiment of the present application;

[0060] FIG. 8a is a diagram of a first field in a unit field and a transmission beam according to an embodiment of the present application;

[0061] FIG. 8b is a diagram of a first field in a unit field and a transmission beam according to an embodiment of the present application;

[0062] FIG. 8c is a diagram of a first field in a unit field and a transmission beam according to an embodiment of the present application;

[0063] FIG. 8d is a diagram of a unit field and a transmission beam according to an embodiment of the present application;

[0064] FIG. 8e is a diagram of a unit field and a transmission beam according to an embodiment of the present application;

[0065] FIG. 9a and FIG. 9b are format diagrams of a unit field according to an embodiment of the present application;

[0066] FIG. 10a is a format diagram of a synchronization field according to an embodiment of the present application;

[0067] FIG. 10b is a format diagram of a unit field according to an embodiment of the present application;

[0068] FIG. 11a is a format diagram of a unit field according to an embodiment of the present application;

[0069] FIG. 11b is a format diagram of a unit field according to an embodiment of the present application;

[0070] FIG. 12 is a schematic diagram of a format of a PPDU according to an embodiment of the present application;

[0071] FIGS. 13a-13c are schematic diagrams of formats of a PPDU according to embodiments of the present application;

[0072] FIG. 14 is a schematic diagram of a format of a PPDU according to an embodiment of the present application;

[0073] FIG. 15 is a flowchart of a method of indicating a PPDU according to an embodiment of the present application;

[0074] FIG. 16 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0075] FIG. 17 is a schematic diagram of another structure of a communication apparatus according to an embodiment of the present application;

[0076] FIG. 18 is a schematic diagram of yet another structure of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0077] To facilitate understanding of the technical solutions of the present application, the present application will be further described below with reference to the drawings.

[0078] The terms "first" and "second" and the like in the specification of the present application, claims, and drawings are used only to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device, or the like that includes a list of steps or units is not limited to the listed steps or units, but can optionally further include other steps or units not listed, or can optionally further include other steps or units inherent to such processes, methods, products, or devices.

[0079] "Embodiments" mentioned herein mean that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0080] In the present application, "at least one" means one or more, "multiple" means two or more, "at least two" means two or three and three or more, and "and / or" is used to describe the relationship between the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. "Or" means there can be two relationships, such as only A, only B; when A and B are not mutually exclusive, it can also mean that there are three relationships, such as only A, only B, and A and B exist at the same time. The character " / " generally represents an "or" relationship between the associated objects before and after it. "At least one of the following" or similar expressions means any combination of these items. For example, at least one of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c".

[0081] In the present application, "indication" can include direct indication, indirect indication, display indication, and implicit indication. When describing that certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0082] In the present application, the information indicated by the indication information is referred to as the to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or the index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information and the to-be-indicated information have an associated relationship. The to-be-indicated information can also be indicated only by a part of the to-be-indicated information, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be achieved by means of the pre-agreed (for example, the protocol stipulates) arrangement order of each information, thereby reducing the indication overhead to a certain extent. In addition, the to-be-indicated information can be sent as a whole, or can be sent separately in multiple sub-information, and the sending period and / or sending time of these sub-information can be the same or different.

[0083] In the present application, transmission can include sending or receiving.

[0084] In the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as the destination of the information is XX, which can include direct transmission through the air interface, and also includes indirect transmission through the air interface by other units or modules. "Receiving information from YY" can be understood as the source of the information is YY, which can include direct reception from YY through the air interface, and also includes indirect reception from YY through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be between devices, such as between network devices and terminal devices, or within devices, such as between components, modules, chips, software modules or hardware modules within a device through a bus, wire or interface.

[0085] The embodiments of the present application provide a measurement method and device, which improve the flexibility of PPDU configuration.

[0086] The embodiments of the present application also provide a measurement method and device, which improve the efficiency of measurement using PPDU. The measurement shown in the embodiments of the present application includes but is not limited to channel measurement, sensing measurement or beam training. The following will not be described in detail.

[0087] The embodiments of the present application also provide a PPDU indication method and device, which indicate the structure of the PPDU through indication information, and improve the communication efficiency.

[0088] The following introduces a communication system related to the present application.

[0089] The technical solutions provided in the embodiments of the present application can be applied to a wireless local area network (WLAN) system, such as Wi-Fi or ambient power (AMP). The method provided in the embodiments of the present application can be applicable to IEEE 802.11 series protocols, for example, 802.11a / b / g protocols, 802.11bf protocols, 802.11az protocols, 802.11bk protocols, 802.11n protocols, 802.11ac protocols, 802.11ax protocols, 802.11be protocols, 802.11bn protocols, or next-generation protocols, and the like. For example, 802.11ad protocols, 802.11ay or next-generation protocols, and the like, which are not listed one by one. The technical solutions provided in the embodiments of the present application can also be applied to a wireless personal area network (WPAN) based on ultra wideband (UWB) technology. The technical solutions provided in the embodiments of the present application can also be applied to millimeter wave (MMW) technology, including integrated MMW (IMMW). The method provided in the embodiments of the present application can be applicable to IEEE 802.15 series protocols, for example, 802.15.4a protocols, 802.15.4z protocols, or 802.15.4ab protocols, or a future generation UWB WPAN protocol, or star flash, and the like, which are not listed one by one. The technical solutions provided in the embodiments of the present application can also be applied to a communication system, for example, can be an internet of things (IoT) system, a vehicle to X (V2X) system, a narrow band IoT (NB-IoT) system, a long term evolution (LTE) system, a 5th-generation (5G) communication system, and a new communication system to be appeared in future communication development, and the like.

[0090] The WLAN system can provide high-rate and low-latency transmission. As the WLAN application scenarios evolve, the WLAN system will be applied to more scenarios or industries, such as the Internet of Things industry, the Internet of Vehicles industry, the banking industry, enterprise offices, stadiums, exhibition halls, concert halls, hotel rooms, dormitories, wards, classrooms, supermarkets, squares, streets, production workshops, and warehouses. Of course, the devices (such as access points or stations) that support WLAN communication or sensing can be sensor nodes in smart cities (such as smart water meters, smart electricity meters, and smart air detection nodes), smart devices in smart homes (such as smart cameras, projectors, display screens, televisions, sound systems, refrigerators, washing machines, and the like), nodes in the Internet of Things, entertainment terminals (such as augmented reality (AR) and virtual reality (VR) wearable devices), smart devices in smart offices (such as printers, projectors, amplifiers, sound systems, and the like), Internet of Vehicles devices in the Internet of Vehicles, infrastructure in daily life scenarios (such as vending machines, self-service navigation stations in supermarkets, self-service checkout devices, and self-service ordering machines), and devices in large sports and music venues.

[0091] Although the embodiments of the present application mainly take WLAN as an example, especially the network applying to the IEEE 802.11 series standards. The various aspects involved in the embodiments of the present application can be extended to other networks using various standards or protocols. For example, Bluetooth, high performance radio LAN (HIPERLAN) (a wireless standard similar to the IEEE 802.11 standard, mainly used in Europe), and wide area network (WAN) or other now known or later developed networks.

[0092] In a possible implementation, the method provided by the embodiments of the present application can be implemented by a communication device in a communication system. For example, the communication device can be an access point (AP) or a station (STA).

[0093] The access point is a device with wireless communication function, which supports communication or sensing using WLAN protocol, has the function of communicating or sensing with other devices (such as non-AP STA or other access points) in the WLAN network, and of course, can also have the function of communicating or sensing with other devices. Alternatively, the access point is equivalent to a bridge connecting wired and wireless networks, and its main function is to connect various wireless network clients together and then access the wireless network to the Ethernet. In the WLAN system, the access point can be referred to as an access point station (AP STA). The device with wireless communication function can be a whole device, or a chip, processing system or functional module installed in the whole device, and the device installed with the chip or processing system or functional module can realize the method and function of the embodiments of the present application under the control of the chip or processing system or functional module. The AP in the embodiments of the present application is a device providing services for non-AP STA, which can support 802.11 series protocol or subsequent protocol, etc. For example, the access point can be an access point for terminals (such as mobile phones) to enter wired (or wireless) networks, which is mainly deployed in homes, buildings and parks, and the typical coverage radius is dozens of meters to hundreds of meters, and of course, it can also be deployed outdoors. For another example, the AP can be a communication server, a router, a switch, a network bridge and other communication entities; the AP can include various forms of macro base stations, micro base stations, relay stations, etc. Of course, the AP can also be a chip or processing system or module in the above various forms of devices, so as to realize the method and function of the embodiments of the present application. Of course, the AP can also include an AP belonging to a multi-link device (MLD), or a co-sited AP, etc.

[0094] The STA is a device with wireless communication function, which supports communication or sensing using WLAN protocol, and has the ability to communicate or sense with other non-AP STAs or access points in the WLAN network. In the WLAN system, the station can be referred to as a non-access point station (non-AP STA). For example, the STA is any user communication device that allows a user to communicate or sense with an AP and then communicate with a WLAN. The device with wireless communication function can be a whole device, or a chip or processing system or functional module installed in the whole device. The device installed with the chip or processing system or functional module can realize the method and function of the embodiments of the present application under the control of the chip or processing system or functional module. For example, the STA can be a wireless communication chip, a wireless sensor or a wireless communication terminal, and can also be referred to as a user. For another example, the STA can be a mobile phone supporting Wi-Fi communication function, a tablet computer supporting Wi-Fi communication function, a set-top box supporting Wi-Fi communication function, a smart television supporting Wi-Fi communication function, a smart wearable device supporting Wi-Fi communication function, a vehicle-mounted communication device supporting Wi-Fi communication function, and a computer supporting Wi-Fi communication function, etc. Of course, the STA can also be a chip or processing system or module in the above various forms of devices, thereby realizing the method and function of the embodiments of the present application. Of course, the STA can also include a non-AP STA or a co-located STA belonging to a multi-link device (MLD).

[0095] For example, the embodiments of the present application can be applied to the scenarios of communication or sensing between AP and STA, between AP and AP, or between STA and STA in WLAN, which are not limited by the embodiments of the present application. Optionally, the AP can communicate or sense with a single STA, or the AP can simultaneously communicate or sense with multiple STAs. Specifically, the communication or sensing between the AP and the multiple STAs can be divided into downlink transmission in which the AP sends signals to multiple STAs simultaneously, and uplink transmission in which multiple STAs send signals to the AP. The communication or sensing between the AP and the STA, between the AP and the AP, and between the STA and the STA can support WLAN communication protocol, which can include IEEE 802.11 series of protocols, such as 802.11n / 802.11ac / 802.11ax / 802.11be / 802.11bn protocols, and of course also applies to protocols after 802.11bn.

[0096] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application. The communication system can include one or more APs and one or more STAs. In FIG. 1, one access point, e.g., AP1, and three stations, e.g., STA1, STA2 and STA3, are shown. By way of example, the method according to an embodiment of the present application can be applied to data communication between one AP and one or more STAs (e.g., communication between AP1 and STA1 as shown in FIG. 1, or communication between AP1 and STA1, STA2), or between APs, or between STAs (e.g., communication between STA2 and STA3 as shown in FIG. 1). The method according to an embodiment of the present application can be applied to, but is not limited to, single-user uplink / downlink transmission, multi-user uplink / downlink transmission, vehicle-to-everything (V2X, X can represent any thing), device-to-device (D2D). For example, the V2X can include vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) or vehicle-to-network (V2N) communication, etc.

[0097] It can be understood that the STA is a mobile phone and the AP is a router in FIG. 1 as an example, which does not limit the types of AP and STA in the embodiments of the present application. Meanwhile, FIG. 1 only shows one AP and three STAs as an example, but the number of APs or STAs can be more or less, which is not limited in the embodiments of the present application.

[0098] The method according to the present application is described below.

[0099] FIG. 2 is a schematic diagram of a sensing measurement method according to an embodiment of the present application. The first station and the second station involved in the sensing measurement method can be referred to the above, which is not described in detail here. For example, the first station can be a sensing sending end, and the second station can be a sensing receiving end. The sensing sending end can be a sensing initiating end or a sensing responding end. Correspondingly, the sensing receiving end can be a sensing responding end or a sensing initiating end. When the method shown in FIG. 2 is applied to channel measurement or beam training, the first station and the second station can have other names, which are not limited in the embodiments of the present application. As shown in FIG. 2, the method includes:

[0100] 201. The first station sends first information, the first information being used to indicate at least one of a number of sending beams or a number of receiving beams. Correspondingly, the second station receives the first information.

[0101] Alternatively, the second station transmits first information indicating at least one of a number of transmit beams or a number of receive beams. Correspondingly, the first station receives the first information.

[0102] In a possible implementation, the first information is carried in a transmit beam list and a receive beam list. The transmit beam list is used to determine the number of transmit beams, and the receive beam list is used to determine the number of receive beams.

[0103] For example, the transmit beam list and the receive beam list are included in a management frame, such as a sensing measurement request frame or a newly defined frame. For example, the sensing initiator transmits at least one of the transmit beam list or the receive beam list, and correspondingly, the sensing responder receives at least one of the transmit beam list or the receive beam list. The sensing initiator and the sensing responder shown herein are exemplified by sensing measurement, and the transmit beam list and the receive beam list shown herein are also applicable to channel measurement or beam training. For channel measurement or beam training, the first station can transmit at least one of the transmit beam list or the receive beam list, and the second station receives at least one of the transmit beam list or the receive beam list. Alternatively, the second station can transmit at least one of the transmit beam list or the receive beam list, and the first station receives at least one of the transmit beam list or the receive beam list.

[0104] For example, the transmit beam list is used to determine the number of transmit beams in a sensing measurement session, and the receive beam list is used to determine the number of receive beams in the sensing measurement session. Alternatively, the transmit beam list is used to determine the number of transmit beams used in beam training, and the receive beam list is used to determine the number of receive beams used in beam training. Alternatively, the transmit beam list is used to determine the number of transmit beams used in channel measurement, and the receive beam list is used to determine the number of receive beams used in channel measurement.

[0105] For example, the transmit beam list includes the number of transmit beams in a sensing measurement session and respective indexes of the transmit beams. The receive beam list includes the number of receive beams in the sensing measurement session and respective indexes of the receive beams.

[0106] As an example, the number of receive beams in each sensing measurement interaction can be indicated by the number of receive beams in the receive beam list. That is, in each sensing measurement interaction, the sensing receiver can traverse all the receive beams in the receive beam list. In this case, the number of transmit beams * the number of repetitions of the transmit beams = the number of receive beams indicated by the receive beam list * the number of repetitions of the receive beams.

[0107] As another example, the number of transmission beams within each sensing measurement interaction can be the number of transmission beams indicated by the transmission beam list. That is, within each sensing measurement interaction, the sensing transmitting end can iterate through all the transmission beams in the transmission beam list. In this case, the number of transmission beams indicated by the transmission beam list * the repetition number of the transmission beams = the number of reception beams * the repetition number of the reception beams.

[0108] As yet another example, the number of transmission beams within each sensing measurement interaction can be the number of transmission beams indicated by the transmission beam list, and the number of reception beams within each sensing measurement interaction can be the number of reception beams indicated by the reception beam list. That is, within each sensing measurement interaction, the sensing transmitting end iterates through all the transmission beams in the transmission beam list, and the sensing receiving end iterates through all the reception beams in the reception beam list.

[0109] Exemplarily, the above sensing measurement request frame can include a DMG sensing measurement request frame. As described above, the above transmission beam list can be included in a transmission beam list subelement (Tx beam list subelement) in a DMG sensing measurement session element in the DMG sensing measurement request frame, and the above reception beam list can be included in a reception beam list subelement (Rx beam list subelement) in the DMG sensing measurement session element in the DMG sensing measurement request frame. The DMG sensing measurement request frame shown herein is only an example, and the sensing measurement request frame shown in embodiments of the present application can also include an IMMW sensing measurement request frame. The format of the IMMW sensing measurement request frame is not limited in embodiments of the present application.

[0110] In embodiments of the present application, the sensing initiating end can configure the number of transmission beams or the number of reception beams within a sensing measurement session through the sensing measurement request frame, and the sensing responding end can know the number of transmission beams or the number of reception beams within a sensing measurement session. Therefore, the two parties of transmission and reception can reasonably adjust the transmission beams or the reception beams of each PPDU within the sensing measurement session, and improve the flexibility of PPDU configuration.

[0111] In a possible implementation, the first information is used to indicate the number of transmission beams within one sensing measurement interaction, and / or the number of reception beams within one sensing measurement interaction.

[0112] As an example, the first information can be carried in a management frame, such as in a sensing measurement request frame or a newly defined frame. The above management frame can be transmitted at a low frequency or at a high frequency, which is not limited in embodiments of the present application.

[0113] Optionally, the number of transmit beams within each of the perception measurement interactions in the perception measurement session can be determined by the first information, such as the number of transmit beams within each of the perception measurement interactions being equal to the number of transmit beams indicated by the first information. That is, the number of transmit beams within each of the perception measurement interactions in the perception measurement session can be the same. Optionally, the number of receive beams within each of the perception measurement interactions in the perception measurement session can be determined by the first information, such as the number of receive beams within each of the perception measurement interactions being equal to the number of receive beams indicated by the first information. That is, the number of receive beams within each of the perception measurement interactions in the perception measurement session can be the same.

[0114] As another example, the first information can be carried in a control frame. The control frame can also be referred to as a configuration frame of the perception measurement interaction, or a configuration frame of the PPDU.

[0115] For example, the control frame can be transmitted in high frequency. The control frame can be included in, but not limited to, a DMG perception request frame or a newly defined frame. The number of transmit beams within each of the perception measurement interactions in the perception measurement session is determined by the DMG perception request frame corresponding to the perception measurement interaction. The number of transmit beams within each of the perception measurement interactions can be the same or different. The number of receive beams within each of the perception measurement interactions in the perception measurement session is determined by the DMG perception request frame corresponding to the perception measurement interaction. The number of receive beams within each of the perception measurement interactions can be the same or different. The DMG perception request frame shown herein is the control frame corresponding to the perception measurement interaction, and in specific implementations, the frame used to configure the number of transmit beams or the number of receive beams within the perception measurement interaction can also be other management frames or control frames, which are not listed one by one herein.

[0116] For another example, the control frame can be transmitted on a low frequency. The control frame can include, but is not limited to, a sensing NDPA frame or a probe trigger frame or a newly defined frame. For a trigger based (TB) sensing measurement instance, one TB sensing measurement instance can include at least one of the following four stages: a polling stage, an NDPA sounding stage, a trigger frame (TF) sounding stage or a reporting stage. In the NDPA sounding stage, the control frame can be a sensing null data packet announcement (NDPA) frame, which can be used to configure a sensing initiator to sensing responder (SI2SR) null data packet (NDP). In the TF sounding stage, the control frame can be a sensing responder to sensing initiator (SR2SI) probe trigger frame, which can be used to configure a SR2SI NDP. For another example for a non-trigger based sensing measurement instance, the control frame can be a sensing NDPA frame, which can be used to configure at least one of a SR2SI NDP or a SI2SR NDP. The control frames listed above are only examples and are not limiting to the embodiments of the present application.

[0117] The following is an example of the first information being included in a sensing measurement request frame when referring to a specific example, which is not limiting to the embodiments of the present application.

[0118] As one example 1, the first information is implemented by a field, which is referred to as a number of beams per instance field or a number of transmit / receive (Tx / Rx) beams per instance field, and the name of the field is not limited to the embodiments of the present application.

[0119] FIG. 3a is a format diagram of a sensing scheduling subelement in a sensing measurement request frame according to an embodiment of the present application. As shown in FIG. 3a, the sensing scheduling subelement includes at least one of the following: a subelement identifier (subelement ID), a length, a start of burst, an interburst interval, an intraburst interval, a number beams per exchange, a repeat per exchange, a number bursts, or a number of exchanges per burst.

[0120] The number beams per exchange field is used to indicate the number of transmit beams in one sensing measurement exchange. The number of transmit beams in one sensing measurement exchange is equal to the number of receive beams in the aforementioned sensing measurement exchange. Alternatively,

[0121] The number beams per exchange field is used to indicate the number of receive beams in one sensing measurement exchange. The number of receive beams in one sensing measurement exchange is equal to the number of transmit beams in the aforementioned sensing measurement exchange.

[0122] For the other descriptions in FIG. 3a, refer to the 802.11 standard, which will not be described in detail herein. The length, order, or name of each field shown in FIG. 3a is only an example, and is not a limitation on the embodiments of the present application.

[0123] FIG. 3a is illustrated by taking a directional multi-gigabit (DMG) sensing measurement request frame as an example. The sensing measurement request frame according to the embodiments of the present application can also include an IMMW sensing measurement request frame, and the format of the IMMW sensing measurement request frame is not limited by the embodiments of the present application.

[0124] As another example 2, the first information is implemented by two fields, the number of transmit beams indicated by the first information is carried in the number beams per exchange field, and the number of receive beams indicated by the first information is carried in the number beams per exchange field.

[0125] Fig. 3b is a format diagram of the sensing schedule subelement in the sensing measurement request frame according to an embodiment of the present application. As shown in Fig. 3b, the sensing schedule subelement includes number Tx beams per exchange and number Rx beams per exchange. The number Tx beams per exchange field is used to indicate the number of transmit beams in one sensing measurement exchange, and the number Rx beams per exchange field is used to indicate the number of receive beams in the aforementioned one sensing measurement exchange. For further description of Fig. 3b, refer to Fig. 3a, which will not be repeated here.

[0126] In the embodiment of the present application, the number of repetitions of the receive beams in the sensing measurement exchange = the number of transmit beams in the sensing measurement exchange * the number of repetitions of the transmit beams / the number of receive beams in the sensing measurement exchange. The sensing receiver can continuously receive multiple times on a single receive beam, and then switch to the next receive beam to continuously receive multiple times. Alternatively, the sensing receiver can also traverse all the receive beams multiple times. For example, the number of receive beams = 3, the number of repetitions = 2, and the receive beams are receive beam 1 to receive beam 3. Then the sensing receiver can continuously receive twice through the receive beam 1, switch to the receive beam 2 to continuously receive twice, and switch to the receive beam 3 to continuously receive twice. Alternatively, the sensing receiver can receive once through the receive beam 1, receive once through the receive beam 2, and receive once through the receive beam 3, and then receive once through the receive beam 1, receive once through the receive beam 2, and receive once through the receive beam 3.

[0127] In the embodiment of the present application, the sensing initiator can configure the number of transmit beams or the number of receive beams in the sensing measurement exchange through the first information, and the sensing responder can know the number of transmit beams or the number of receive beams in one sensing measurement exchange. Thus, the transceiver parties can reasonably adjust the transmit beams or the receive beams of each PPDU in the sensing measurement exchange, improve the flexibility of PPDU configuration, and improve the communication efficiency.

[0128] The first information indicates the number of transmit beams or the number of receive beams in one sensing measurement exchange. The number of transmit beams can not be all the transmit beams in the transmit beam list, and the number of receive beams can not be all the receive beams in the receive beam list. Therefore, the index of the transmit beam and the index of the receive beam can also be indicated through the management frame or the control frame. For example, the sensing transmitter can not traverse all the transmit beams in the transmit beam list in one sensing measurement exchange, and the sensing receiver can not traverse all the receive beams in the receive beam list in one sensing measurement exchange. Therefore, the index of the transmit beam and the index of the receive beam can be indicated through the management frame or the control frame for one sensing measurement exchange.

[0129] In a possible implementation, the first station transmits at least one of the first index information or the second index information, the first index information being used to indicate a starting index of a transmit beam within one sensing measurement interaction, and the second index information being used to indicate a starting index of a receive beam within one sensing measurement interaction. The second station receives the at least one of the first index information or the second index information.

[0130] Alternatively, the second station transmits at least one of the first index information or the second index information. The first station receives the at least one of the first index information or the second index information.

[0131] The first station or the second station can determine respective indexes of the transmit beam within one sensing measurement interaction according to the first index information and the first information, and determine respective indexes of the receive beam within one sensing measurement interaction according to the second index information and the first information.

[0132] As an example, the first index information or the second index information can be contained in a control frame. The description of the control frame can refer to the foregoing, and will not be repeated here.

[0133] For example, the control frame can be transmitted in high frequency. The control frame can include, but is not limited to, a DMG sensing request frame or a newly defined frame.

[0134] For another example, the control frame can be transmitted in low frequency. The control frame can include, but is not limited to, a sensing NDPA frame or a sounding trigger frame or a newly defined frame.

[0135] The description of the control frame can refer to the foregoing, and will not be repeated here.

[0136] As a further example, the first index information or the second index information can be contained in a physical layer header of a PPDU. In this case, the first station can carry the first index information or the second index information in the physical layer header when transmitting the PPDU.

[0137] The embodiments of the present application do not limit the frame carrying the first index information or the second index information.

[0138] The starting index of the transmit beam can be the same or different for different sensing measurement interactions, and the starting index of the receive beam can be the same or different for different sensing measurement interactions.

[0139] As an example, the first index information and the second index information are implemented by one field, such as a field referred to as a starting beam index field or a Tx / Rx starting beam index field, and the name of the field is not limited in the embodiments of the present application. The starting beam index field is used to indicate a starting index of a transmission beam within one sensing measurement interaction. The starting index of the transmission beam within the sensing measurement interaction is the same as a starting index of a reception beam within the sensing measurement interaction.

[0140] FIG. 4 is a format diagram of a TDD beamforming information field in a DMG sensing request frame according to an embodiment of the present application. As shown in FIG. 4, the TDD beamforming information field includes at least one of a DMG measurement session, a measurement burst ID, a sensing exchange sequence number (sensing exchange SN), a sensing type, a STA ID, a first beam index, a number of STAs in exchange, a number of PPDUs in exchange, an enhanced directional multi-gigabit (EDMG) training (TRN) length, a reception training unit per transmission training unit (Rx TRN-unit per each Tx TRN-unit), an EDMG TRN-unit P, an EDMG TRN-unit M, an EDMG TRN-unit N, a TRN subfield sequence length, a bandwidth (BW), a sensing multiple golay, a sensing golay index, a monostatic sounding mode, a number of Tx beams in exchange, a number of repeat in exchange, a number of absent exchange, or an updated Tx beam list.

[0141] As shown in FIG. 4, the start beam index can be used to indicate the start index of the transmit beam (or receive beam) within the sensing measurement interaction. The start index of the transmit beam within the sensing measurement interaction is the same as the start index of the receive beam within the sensing measurement interaction. In other words, the start beam index can be used to indicate the start index of the transmit beam and the start index of the receive beam within the sensing measurement interaction.

[0142] As another example, the first index information and the second index information are implemented by one field respectively, such as the first index information is carried in a transmit beam start index field and the second index information is carried in a receive beam start index field. The transmit beam start index field is used to indicate the start index of the transmit beam within one sensing measurement interaction, and the receive beam start index field is used to indicate the start index of the receive beam within the one sensing measurement interaction.

[0143] Still taking FIG. 4 as an example, the start beam index field can be modified as a first Tx beam index. Meanwhile, the TDD beam information field shown in FIG. 4 can also increase a first Rx beam index field.

[0144] In the embodiments of the present application, by indicating the start index of the transmit beam and the start index of the receive beam, the transceiving parties can effectively know the transmit beam and the receive beam. Therefore, the transceiving parties can reasonably adjust the transmit beam and the receive beam of each PPDU within the sensing measurement interaction, improve the flexibility of PPDU configuration, and improve the communication efficiency.

[0145] 202. The first station transmits second information, the second information being used to indicate the repetition number of the transmit beam. Correspondingly, the second station receives the second information.

[0146] As an example, the second information is contained in a control frame. The control frame can be transmitted on high frequency or low frequency. Through the second information, the repetition number of the transmit beam can be configured for each sensing measurement interaction. For example, the second information can be carried in a repetition (Rep) field in the control frame.

[0147] As another example, the second information is contained in a management frame, such as a sensing measurement request frame or a newly defined frame. The sensing measurement request frame can be transmitted on high frequency or low frequency. Through the second information, the repetition number of the transmit beam can be configured for the sensing measurement session. In this case, the repetition number of the transmit beam in each sensing measurement interaction is the same. For example, the second information can be carried in a Rep field in the sensing measurement request frame.

[0148] As a further example, the second information is contained in a physical layer header of the PPDU. The physical layer header includes a SIG field or a header field, for example. Further description about the PPDU can be referred to below, which is not elaborated here.

[0149] The first information and the second information shown above can be contained in the same frame or in different frames, which is not limited by embodiments of the present application.

[0150] Optionally, the sensing initiator and the sensing responder can interact signaling in a unicast manner. When the first station is the sensing initiator and the second station is the sensing responder, the first station can send the first information and the second information to the first station. For M second stations, the first station can send the first information 1 and the second information 1 to the second station 1, the first information 2 and the second information 2 to the second station 2, and so on, and the first information M and the second information M to the second station M. Whether the number of transmission beams indicated by the first information 1, the number of transmission beams indicated by the first information 2, and the number of transmission beams indicated by the first information M are the same is not limited by embodiments of the present application. Whether the number of reception beams indicated by the first information 1, the number of reception beams indicated by the first information 2, and the number of reception beams indicated by the first information M are the same is not limited by embodiments of the present application. Whether the number of repetitions of transmission beams indicated by the second information 1, the number of repetitions of transmission beams indicated by the second information 2, and the number of repetitions of transmission beams indicated by the second information M are the same is not limited by embodiments of the present application.

[0151] In a possible implementation, the method shown in FIG. 2 includes that the first station generates N PPDU, N is an integer greater than or equal to 1.

[0152] The N PPDU can be generated by the first station at different times. Embodiments of the present application do not limit the generation time of the N PPDU. The N PPDU can be used for beam training, or for sensing measurement, or for channel measurement. In other words, the N PPDU can be a PPDU for sensing measurement, or a PPDU for beam training, or a PPDU for channel measurement.

[0153] As an example, the N PPDU is a PPDU within a sensing measurement interaction. Or, a PPDU within a sensing measurement interaction is the N PPDU. Within the sensing measurement interaction, the first station can send the N PPDU.

[0154] As another example, the N PPDU is a PPDU within a sensing measurement session. Or, a PPDU within a sensing measurement session is the N PPDU. Within the sensing measurement session, the first station can send the N PPDU.

[0155] As another example, the N PPDU can also be a PPDU within a group transmission. In other words, the N PPDU is a PPDU within a group transmission. Within a group transmission, the first station can transmit the N PPDU.

[0156] A sensing measurement session can include one or more sensing measurement interactions. Alternatively, a sensing measurement session includes one or more group transmissions, and a group transmission includes one or more sensing measurement interactions. Here, sensing measurement is exemplified, and beam training or channel measurement can also have similar procedures, which are not listed one by one here.

[0157] 203、The first station transmits N PPDU to M second stations, and correspondingly, the second stations receive the N PPDU. The operation result of the number of transmission beams and the number of repetitions of the transmission beams is equal to the operation result of the number of reception beams and the number of repetitions of the reception beams. The transmission beam is a beam used for transmitting the N PPDU, and the reception beam is a beam used for receiving the N PPDU.

[0158] The ellipsis in FIG. 2 omits the second stations, and FIG. 2 only exemplarily shows the second station 1 and the second station M. M=1, or M=2, or M is greater than 2. Each of the M second stations can receive the N PPDU. Alternatively, the number of second stations can be indicated by a DMG sensing request frame, or indicated by an IMMW sensing request frame, and the indication manner of the number of second stations is not limited in the embodiments of the present application.

[0159] Exemplarily, for each second station, the number of reception beams*the number of repetitions of the reception beams = the number of transmission beams*the number of repetitions of the transmission beams.

[0160] When the number of transmission beams is 1, the number of repetitions of the single transmission beam = the number of reception beams*the number of repetitions of the reception beams. For example, the number of transmission beams = 1, and the number of repetitions of the transmission beam is equal to 10. For the second station 1, the number of reception beams is equal to 2, and the number of repetitions of the reception beam is equal to 5. For the second station 2, the number of reception beams is equal to 5, and the number of repetitions of the reception beam is equal to 2. Here, the number of repetitions of each transmission beam or reception beam is exemplified to be the same, and in the specific implementation, the number of repetitions of different reception beams can also be different. For example, the number of reception beams can be equal to 3, and the number of repetitions of the three reception beams is 3, 3, and 4 in turn.

[0161] When the number of transmit beams is greater than or equal to 2, the number of transmit beams * the number of repetitions of transmit beams = the number of receive beams * the number of repetitions of receive beams. For example, the number of transmit beams = 3, and the number of repetitions of transmit beams is equal to 10. As for the second station 1, the number of receive beams can be equal to 5, and the number of repetitions of receive beams is equal to 6. As for the second station 2, the number of receive beams is equal to 6, and the number of repetitions of receive beams is equal to 5, and so on, which will not be listed one by one here.

[0162] As an example, when N = 1, for the 1 PPDU, the operation result of the number of transmit beams of the 1 PPDU * the number of repetitions of transmit beams = the operation result of the number of receive beams of the 1 PPDU * the number of repetitions of receive beams.

[0163] As another example, when N is greater than or equal to 2, for the N PPDUs, the operation result of the number of transmit beams of the N PPDUs * the number of repetitions of transmit beams = the operation result of the number of receive beams of the N PPDUs * the number of repetitions of receive beams. For example, when N = 2, the 2 PPDUs are PPDU a and PPDU b. The number of transmit beams of PPDU a is equal to 1, and the number of repetitions of transmit beams is equal to 10. The number of transmit beams of PPDU b is equal to 2, and the number of repetitions of transmit beams is equal to 10. For example, the number of receive beams of PPDU a can be equal to 2, and the number of repetitions of receive beams is equal to 5. The number of receive beams of PPDU b can be equal to 4, and the number of repetitions of receive beams is equal to 5. For another example, the number of receive beams of PPDU a can be equal to 2, and the number of repetitions of receive beams is equal to 6. The number of receive beams of PPDU b can be equal to 3, and the number of repetitions of receive beams is equal to 6. Thus, the number of transmit beams, the number of repetitions of transmit beams, and the number of receive beams of a single PPDU in the N PPDUs can be flexibly adjusted.

[0164] In a possible implementation, the first station can send N PPDU on a high frequency. In the embodiments of the present application, the high frequency and the low frequency are relative. For example, the frequency of the low frequency can be lower than a first threshold, such as lower than 7 GHz (sub-7 GHz), or the frequency of the low frequency can include 2.4 GHz-7.25 GHz (which can also be referred to as sub-7 GHz). The frequency of the high frequency can be higher than a second threshold, such as higher than 42 GHz, or the frequency of the high frequency can include 42 GHz-71 GHz. The second threshold can be greater than the first threshold. The specific values of the first threshold and the second threshold are not limited in the embodiments of the present application. Of course, with the development of standards, other frequencies of the high frequency and the low frequency can appear in the future, which are not limited in the present application. The management frame or the control frame shown in the embodiments of the present application can be transmitted on the low frequency or the high frequency, which is not limited in the embodiments of the present application.

[0165] 204, the second station parses the N PPDU.

[0166] For example, each of the M second stations can parse the N PPDU after receiving the N PPDU.

[0167] The second station parsing the N PPDU includes that the second station determines a sensing measurement result according to the N PPDU, or determines a beam training result according to the N PPDU, or determines a channel measurement result according to the N PPDU. The sensing measurement result mentioned herein is the sensing measurement result of the N PPDU, similarly, the beam training result is the beam training result of the N PPDU, and the channel measurement result is the channel measurement result of the N PPDU. The second station can also determine multiple sensing measurement results or multiple beam training results or multiple channel measurement results according to the N PPDU.

[0168] The description of the N PPDU in FIG. 2 can also be applied to the multi-transmit and single-receive scenario. For example, each of the M first stations can generate N PPDU and send the N PPDU to the second station. The second station can receive the N PPDU sent by each of the M first stations respectively and parse the N PPDU.

[0169] In the embodiments of the present application, the transmission beam of the sensing transmission end and the reception beam of the sensing reception end can perform channel measurement or sensing or beam training by satisfying the above conditions, so that the transmission and reception parties can flexibly adjust the reception beam of a single PPDU and improve the flexibility of PPDU configuration. Further, through the above conditions, it can also be ensured that the sensing reception end can traverse all possible reception directions, such as the sensing reception end can traverse all reception beams, or the sensing reception end can traverse part of the reception beams.

[0170] FIG. 5 is a schematic diagram of a scenario of a sensing measurement method in the prior art. As shown in FIG. 5, when sensing or channel measurement or beam training is performed in the millimeter wave frequency band, the sensing device can send an NDPA frame in the low frequency, and then switch to the high frequency to send an NDP in multiple directions. When the sensing sending end needs to perform channel measurement or beam training or sensing in multiple directions, the sensing sending end sends one or more PPDU in each direction, and the PPDU in different directions is separated by a time interval, such as a short interframe space (SIFS). The time interval between the PPDU reduces the measurement efficiency. When multiple sensing devices need to be coordinated to perform beam training or sensing or channel measurement, the multiple sensing devices perform beam training or sensing or channel measurement one by one in a time-division manner. This further reduces the measurement efficiency, and when the number of devices increases, the time required to complete the beam training or channel measurement or sensing will increase linearly.

[0171] Therefore, the embodiment of the present application also provides a measurement method, in which the format of the PPDU is designed, and the beam training or sensing or channel measurement in different directions is realized through the first field in the PPDU, thereby improving the measurement efficiency. The PPDU can be used in a one-to-many scenario or a many-to-one scenario. One-to-many refers to one sensing sending end and multiple sensing receiving ends. Many-to-one refers to multiple sensing sending ends and one sensing receiving end.

[0172] FIG. 6 is another flowchart of the measurement method provided by the embodiment of the present application. The first station and the second station involved in the measurement method can refer to the above, and will not be described here in detail. As shown in FIG. 6, the method includes the following steps.

[0173] In a possible implementation, the method shown in FIG. 6 includes step 601.

[0174] 601. The first station generates a PPDU. The PPDU includes a synchronization field and one or more unit fields; the synchronization field includes M synchronization subfields, each synchronization subfield corresponding to a second station; the unit field includes one or more first fields, the first field including one or more second fields, the second field including one or more LTFs. The first field corresponds to a sending beam, and the number of second fields in the first field represents the number of repetitions of the sending beam.

[0175] The first field corresponds to one transmit beam, or the first field corresponds to one direction, which is the direction of the transmit beam. The LTF in the second field can be an IMMW-LTF. The PPDU can be used for measurement. The measurement includes, but is not limited to, beam training, sensing measurement, or channel measurement. In other words, the PPDU can be a PPDU for sensing measurement, or a PPDU for beam training, or a PPDU for channel measurement. The embodiment of the present application does not limit the specific format of the LTF. The format of the PPDU can be referred to below, and will not be described in detail here.

[0176] The M is 1, or the M is 2, or the M is greater than 2.

[0177] 602. The first station transmits the PPDU, and correspondingly, the second station receives the PPDU.

[0178] For example, the first station can transmit the PPDU to the M second stations.

[0179] Optionally, the second station can receive the synchronization subfield corresponding to the second station in the PPDU, and the third field corresponding to the second station.

[0180] Each of the M second stations can receive the first field in the unit field in the PPDU. Each of the second stations can receive the fields except the synchronization field and the third field.

[0181] In a possible implementation, the method shown in FIG. 6 includes step 603.

[0182] 603. The second station parses the PPDU.

[0183] In the embodiment of the present application, the first field in the PPDU realizes the measurement in different directions. When the first station measures in different directions, there is no need to interval a period of time between different PPDUs, which omits the interval between PPDUs in different directions, and thus improves the measurement efficiency.

[0184] The PPDU can further improve the measurement efficiency for the one-to-many or many-to-one scenario, and thus better support the measurement of multiple devices. For example, for the one-to-many scenario, as the number of sensing receivers increases, the PPDU provided by the embodiment of the present application will not cause the completion time to increase linearly. For example, for the many-to-one scenario, as the number of sensing transmitters increases, the PPDU provided by the embodiment of the present application will not cause the completion time to increase linearly.

[0185] The format of the PPDU related to the embodiment of the present application is introduced below.

[0186] In a possible implementation 1, the PPDU includes one or more unit fields, each of the unit fields includes a plurality of first fields, and each of the first fields includes one or more second fields.

[0187] Optionally, the one or more unit fields can be included in a measurement field. Optionally, the structures of the plurality of unit fields can be the same. For example, the number of the first fields in the plurality of unit fields is the same, and the first fields correspond to the same transmit beam. Optionally, the structures of the unit fields except the last unit field in the plurality of unit fields can be the same. Keeping the structures of the unit fields the same is conducive to the second station performing beam training or channel measurement or sensing measurement multiple times, and improves the accuracy of the measurement.

[0188] When the number of the second fields in the first field is 1, the number of repetitions of the transmit beam corresponding to the first field is 1. When the number of the second fields in the first field is more than 1 (for example, 2 or more), the number of repetitions of the transmit beam corresponding to the first field is more than 1 (for example, 2 or more).

[0189] FIG. 7 is a schematic diagram of a format of a unit field according to an embodiment of the present application. FIG. 7 exemplarily shows one unit field in a PPDU. For other unit fields in the PPDU, refer to the description of the unit field 1. As shown in FIG. 7, the unit field includes first field 1 to first field n. n is an integer greater than or equal to 2. Each of the first fields includes two second fields, and each of the second fields includes two LTFs. In FIG. 7, each of the first fields includes two second fields, and each of the second fields includes two LTFs, which is only an example. In a specific implementation, each of the first fields can include more or less second fields, and each of the second fields can include more or less LTFs.

[0190] Optionally, the number of the first fields in each of the unit fields is the same. Optionally, the number of the second fields in each of the first fields is the same.

[0191] In the embodiments of the present application, each of the first fields corresponds to a transmit beam. The format of the PPDU is described below in combination with the relationship between the first field and the transmit beam. FIGS. 8a-8e are all examples of FIG. 7, and thus other descriptions of FIGS. 8a-8e can also refer to FIG. 7.

[0192] As an example 1, each of the first fields in the unit field corresponds to a transmit beam, and different first fields correspond to different transmit beams. In other words, the number of the first fields corresponding to the same transmit beam is 1.

[0193] FIG. 8a is a schematic diagram between the first field in the unit field and the transmission beam according to an embodiment of the present application. As shown in FIG. 8a, the first field 1 corresponds to the direction 1, i.e., the first field 1 corresponds to the transmission beam 1. The first field 2 corresponds to the direction 2, i.e., the first field 2 corresponds to the transmission beam 2. Similarly, the first field n corresponds to the direction n, i.e., the first field n corresponds to the transmission beam n.

[0194] For example 1, the first station can implement the measurement in different directions through the first field in the PPDU, thereby improving the measurement efficiency.

[0195] As another example 2, each first field in the unit field corresponds to a transmission beam, and at least two first fields correspond to the same transmission beam. For example, a unit field includes n first fields, such as the first field 1 to the first field n. The first field 1 to the first field n1 can correspond to the same transmission beam. That is, the number of the first fields corresponding to the same transmission beam is n1. For example, n1 = 2 or 3 or 4, and the like, which are not listed here. Optionally, the first field n1+1 to the first field n2 correspond to the same transmission beam. That is, the number of the first fields corresponding to the same transmission beam is n2-n1. For example, n2-n1 = n1. n1 and n2 can each be a positive integer less than n. n2 is greater than n1.

[0196] FIG. 8b is a schematic diagram between the first field in the unit field and the transmission beam according to an embodiment of the present application. As shown in FIG. 8b, the first field 1 and the first field 2 can correspond to the same direction, i.e., the first field 1 and the first field 2 can correspond to the same transmission beam. Or, the first fields corresponding to the same direction 1 are the first field 1 and the first field 2.

[0197] As another example 3, each first field in the unit field corresponds to a transmission beam, and the transmission beam corresponding to each first field is the same.

[0198] FIG. 8c is a schematic diagram between the first field in the unit field and the transmission beam according to an embodiment of the present application. As shown in FIG. 8c, the first field 1 to the first field n can each correspond to the same direction (such as the direction 1), i.e., the first field 1 to the first field n can correspond to the same transmission beam.

[0199] Since each first field in the unit field corresponds to the same transmission beam, the transmission beam corresponding to the first field is also the transmission beam corresponding to the unit field. For different unit fields, the following examples can also be provided:

[0200] For example, the PPDU includes at least two unit fields, each unit field corresponds to a transmission beam, and different unit fields correspond to different transmission beams. That is, the number of the unit fields corresponding to the same transmission beam is 1.

[0201] FIG. 8d is a schematic diagram of the relationship between the unit fields and the transmission beams according to an embodiment of the present application. As shown in FIG. 8d, the unit field 1 corresponds to the direction 1, i.e., the unit field 1 corresponds to the transmission beam 1. The unit field 2 corresponds to the direction 2, i.e., the unit field 2 corresponds to the transmission beam 2.

[0202] For another example, the PPDU includes at least two unit fields, each of which corresponds to a transmission beam, the at least two unit fields correspond to the same transmission beam, and the at least two unit fields correspond to different transmission beams. For example, the PPDU includes four unit fields (e.g., unit field 1 to unit field 4), the unit field 1 and the unit field 2 correspond to the transmission beam 1 (e.g., the direction of the transmission beam 1 is the direction 1), and the unit field 3 and the unit field 4 correspond to the transmission beam 2 (e.g., the direction of the transmission beam 2 is the direction 2).

[0203] For another example, the PPDU includes at least two unit fields, each of which corresponds to a transmission beam, the at least two unit fields correspond to the same transmission beam, and the at least two unit fields correspond to different transmission beams. For example, the PPDU includes four unit fields (e.g., unit field 1 to unit field 4), the unit field 1 and the unit field 2 correspond to the transmission beam 1 (e.g., the direction of the transmission beam 1 is the direction 1), and the unit field 3 and the unit field 4 correspond to the transmission beam 2 (e.g., the direction of the transmission beam 2 is the direction 2).

[0204] When the number of unit fields corresponding to the same transmission beam is greater than 1, the following scenarios can be better adapted:

[0205] The unit fields are continuously transmitted in one direction for the second station to receive (e.g., reception in multiple different directions). Thus, the same transmission beam is corresponded to across multiple unit fields, the stability of the beam can be maintained, so that the second station can switch more beams. Generally, when the number of unit fields is greater than 1 or more, the second station can facilitate beam switching.

[0206] FIG. 8e is a schematic diagram of the relationship between the unit fields and the transmission beams according to an embodiment of the present application. As shown in FIG. 8e, the unit field 1 and the unit field 2 both correspond to the direction 1, i.e., the unit field 1 and the unit field 2 correspond to the same transmission beam.

[0207] In the embodiments of the present application, different unit fields correspond to the same transmission beam, which can better support the scenario that the number of reception beams of the second station is large.

[0208] In a possible implementation form 2, the PPDU includes one or more unit fields, each of which includes a first field, and each of the first fields includes one or more second fields.

[0209] When the number of the second fields in the first field is 1, the number of repetitions of the transmission beam corresponding to the first field is 1. When the number of the first fields in the unit field is 1, the transmission beam corresponding to the first field is also the transmission beam corresponding to the unit field. Optionally, when the number of the first fields in each unit field is 1, the relationship among the unit field, the first field and the second field can also be that the unit field includes one or more second fields. That is, there can be no distinction of the first field.

[0210] FIG. 9a and FIG. 9b are schematic diagrams of formats of the unit field provided by the embodiments of the present application. As shown in FIG. 9a, the number of the first fields in the unit field is 1. Each first field includes multiple second fields, that is, the number of repetitions of the transmission beam corresponding to the first field is greater than or equal to 2. As shown in FIG. 9b, the number of the first fields in the unit field is 1, and the number of the second fields in the first field is 1. That is, the number of repetitions of the transmission beam corresponding to the first field is 1.

[0211] Since the number of the first fields in the unit field is 1, the transmission beam corresponding to the first field is also the transmission beam corresponding to the unit field. As an example, the PPDU includes at least two unit fields, each unit field corresponds to a transmission beam, and different unit fields correspond to different transmission beams. As another example, the PPDU includes at least two unit fields, each unit field corresponds to a transmission beam, and at least two unit fields correspond to the same transmission beam. Optionally, at least two unit fields correspond to different transmission beams. As yet another example, the PPDU includes at least two unit fields, and the at least two unit fields correspond to the same transmission beam. Here, the relationship between the unit field and the transmission beam can also refer to the description of Example 3 above, which will not be described one by one here.

[0212] Optionally, the number of the first fields in each unit field in the PPDU is the same. Alternatively, the number of the first fields in at least two unit fields in the PPDU is different. Optionally, the number of the second fields in each first field in the unit field is the same. Alternatively, the number of the second fields in at least two first fields in the unit field is different.

[0213] When the first station transmits the first field in the corresponding direction, the second station participating in the measurement can receive the first field. For example, when the first station transmits the first field 1 through the transmission beam 1, the M second stations can receive the first field 1 using the same reception beam, or can also receive the first field 1 using different reception beams. The embodiments of the present application do not limit this.

[0214] In the embodiments of the present application, the number of the second fields in the first field indicates the number of repetitions of the transmission beam corresponding to the first field. Therefore, the second field can also be referred to as a repetition block field or an LTF repetition block or an IMMW-LTF repetition block. The first field can also be referred to as a user block field or an LTF user block or an IMMW-LTF user block. Here, the PPDU is taken as an example of the IMMW PPDU, and the PPDU shown in the embodiments of the present application can also be applied to DMG and the like. The PPDU shown in the embodiments of the present application can be transmitted at a high frequency. For the description of the high frequency and the low frequency, reference can be made to FIG. 2, which will not be described in detail here.

[0215] In the case where the PPDU does not include the fifth field (as shown below) or the first time duration is not arranged between adjacent first fields, the corresponding one or more first fields on each transmission beam are closely arranged. In this way, the beam switching of the PPDU needs to be completed in a short time and reach stability (such as completing the beam switching and reaching stability, which is referred to as completing the beam switching). Therefore, in a possible implementation, the time required for the device to complete the switching can be constrained for the above-mentioned PPDU. Alternatively, the first station can be required to complete the beam switching (complete the switching and reach stability) within the cyclic prefix (CP) duration of the first LTF symbol in the first first field in each direction. Alternatively, the first station can be required to complete the beam switching within the first 1 / X of the CP duration of the first LTF symbol in the first first field in each direction. The symbol in the PPDU can use a normal CP or a zero power CP, and the like, which is not limited in the embodiments of the present application. The value of X is not limited in the embodiments of the present application.

[0216] In a possible implementation 3, the PPDU includes a synchronization (SYNC) field, and the synchronization field includes M synchronization subfields, each synchronization subfield corresponding to a second station. That is, the number of synchronization subfields in the synchronization field is the same as the number of second stations. For example, the number of synchronization subfields is equal to the number of sensing receivers. The first station can allocate a synchronization subfield to each second station through the synchronization field. The synchronization subfield can be used to carry a synchronization sequence. The specific content of the synchronization sequence is not limited in the embodiments of the present application.

[0217] The synchronization field can be used for at least one of the following: completion of beam training or channel measurement or preparation of sensing by the second station (i.e., the sensing receiver), time-frequency synchronization, phase tracking, or automatic gain control (AGC) adjustment. For example, the second station 1 can receive the synchronization subfield corresponding to it and perform time-frequency synchronization or phase tracking or AGC adjustment according to the synchronization subfield corresponding to the second station 1.

[0218] Optionally, the synchronization field includes a padding field. The padding field can be used to fill the synchronization field, so that the length of the synchronization field can meet the requirements. For example, the length of the synchronization field is 8 bits, or an integer number of bytes, etc.

[0219] FIG. 10a is a schematic diagram of the format of the synchronization field according to an embodiment of the present application. FIG. 10a is an example in which M=2, and is not intended to limit the embodiments of the present application. As shown in FIG. 10a, the synchronization field includes synchronization subfield 1 and synchronization subfield 2. Optionally, the synchronization field also includes a padding field. The synchronization subfield 1 can correspond to the second station 1, and the synchronization subfield 2 can correspond to the second station 2.

[0220] Optionally, the synchronization field described above can be located before the unit field in the PPDU. For the IMMW PPDU, the synchronization field can also be referred to as the IMMW synchronization field.

[0221] In a possible implementation form 4, the unit field in the PPDU includes M third fields, each of which corresponds to a second station. That is, the number of third fields in the unit field is the same as the number of second stations.

[0222] The third field can correspond to a direction that has been trained in advance, such as the direction of the second station corresponding to the third field. Thus, the second station can perform at least one of the following through the third field corresponding to the second station: time-frequency synchronization, phase tracking, and AGC adjustment.

[0223] Optionally, the M third fields are located before the first first field in the unit field. In other words, there are M third fields at the beginning of each unit field.

[0224] FIG. 10b is a schematic diagram of a unit field according to an embodiment of the present application. FIG. 10b shows one unit field and two second stations. FIG. 10b is an example in which the third field is a short training field (STF). The third field shown in the embodiments of the present application can be an STF or an LTF. For an IMMW PPDU, the third field can be an IMMW-STF or an IMMW-LTF. The IMMW-LTF includes one or more IMMW-LTF symbols, and the IMMW-STF includes one or more IMMW-STF symbols.

[0225] As shown in FIG. 10b, the unit field includes two third fields. The first third field of the two third fields corresponds to the second station 1, i.e., the first station can send the first third field to the second station 1 along the trained direction. The second third field of the two third fields corresponds to the second station 2, i.e., the first station can send the second third field to the second station 2 along the trained direction.

[0226] The descriptions of the first field and the second field in FIG. 10b can refer to the above-mentioned implementation manner 1 or implementation manner 2, and will not be described in detail herein.

[0227] In a possible implementation manner 5, the first unit field in the PPDU further includes a fourth field. The fourth field can be an STF or an LTF. The LTF includes an IMMW-LTF, and the IMMW-LTF includes one or more IMMW-LTF symbols. The STF includes an IMMW-STF, and the IMMW-STF includes one or more IMMW-STF symbols. The fourth field can be used to prepare for subsequent beam switching. As through the fifth field, the first station can have enough time to prepare for subsequent multi-beam measurement.

[0228] In a possible implementation manner 6, the first field further includes a fifth field. The fifth field is used for at least one of the following: beam switching, AGC adjustment, synchronization, or phase tracking. The fifth field can be an LTF or an STF. The LTF includes an IMMW-LTF, and the IMMW-LTF includes one or more IMMW-LTF symbols. The STF includes an IMMW-STF, and the IMMW-STF includes one or more IMMW-STF symbols. Optionally, the direction of the fifth field can be along the trained direction, such as along the direction of the sensing receiving end. Optionally, the direction of the fifth field can be the same as the direction of the SIG field or the header field of the PPDU including the fifth field. The number of the fifth fields is not limited in the embodiments of the present application.

[0229] FIG. 11a is a schematic diagram of a format of a unit field according to an embodiment of the present application. As shown in FIG. 11a, the unit field 1 includes a first field 1 and a first field 2. The first field 1 is further preceded by an LTF or an STF. The first field 2 is further preceded by an LTF or an STF. The number of first fields included in one unit field shown in FIG. 11a is merely an example, and other descriptions regarding FIG. 11a can refer to FIGs. 7-10b, which will not be described herein.

[0230] In the embodiments of the present application, since the first field can correspond to one transmission beam, the fifth field is added before the first field, so that the first station can have sufficient time for beam switching.

[0231] In a possible implementation 7, a first duration is provided between two adjacent first fields in each unit field. The first duration is used for at least one of the following: beam switching, AGC adjustment, synchronization, or phase tracking. The first station can not transmit any field within the first duration. The first station can perform beam switching within the first duration.

[0232] As an example, the first duration can be fixed. For example, the first duration is a fixed duration defined by a standard, or the first duration is a fixed duration configured by the sensing initiator. As another example, the first duration is a duration flexibly configured by the sensing initiator.

[0233] When the first duration is configured by the sensing initiator, the sensing initiator can transmit information indicating the first duration, and the sensing responder receives the information and learns the first duration according to the information. For example, the unit of the first duration is microsecond (μs), and the information indicating the first duration indicates that the first duration is X μs. For example, the unit of the first duration is the duration corresponding to one LTF symbol, and the information indicating the first duration indicates that the first duration is the duration corresponding to Y LTF symbols. The specific indication manner of the first duration is not limited in the embodiments of the present application.

[0234] FIG. 11b is a schematic diagram of a format of a unit field according to an embodiment of the present application. As shown in FIG. 11b, a first duration is provided between two adjacent first fields, and the first duration is denoted as Tgap. FIG. 11b is illustrated by taking the first field 1 and the first field 2 as an example. Optionally, the first duration can also be provided between the first first field in the unit field and the field before the first field. For example, the first duration before the first field 1 in FIG. 11b. The description of the LTF / STF shown in FIG. 11b can refer to FIG. 11a, which will not be described herein.

[0235] Similarly, for the first duration described above, when the first duration is the duration corresponding to Y LTF symbols, whether the CP of each symbol is a normal CP or a zero-power CP is not limited in the embodiments of the present application.

[0236] The numbers in the above implementation modes 1-7 are set for ease of reference, and do not limit the embodiments of the present application. The above implementation modes 1, 3-7 can be combined with each other, or the above implementation modes 2-7 can be combined with each other.

[0237] The following takes the IMMW PPDU as an example to illustrate the PPDU for measurement provided by the embodiments of the present application. The IMMW PPDU shown below is only an example, and does not limit the embodiments of the present application.

[0238] FIG. 12 is a format diagram of a PPDU provided by the embodiments of the present application. As shown in FIG. 12, the PPDU includes at least one of the following: IMMW-STF, IMMW-LTF, IMMW-SIG (or header), data field, IMMW-STF / LTF, synchronization field, IMMW-STF / LTF (i.e., the fourth field shown above), or unit field. FIG. 12 exemplarily shows two unit fields, and the ellipsis omits more unit fields. The format in the unit field can be referred to the above, and will not be described in detail here. The multiple unit fields shown in FIG. 12 can be carried in a measurement field. The measurement field can also be referred to as a beam training field or a channel measurement field or a sensing measurement field, etc. The name of each field is not limited by the embodiments of the present application.

[0239] Exemplarily, the IMMW-STF can be used for automatic gain control of the subsequent field, such as AGC adjustment, etc. The IMMW-LTF can be used for channel estimation. The data field can be used to carry data information. The IMMW-SIG field can be used to carry the structure information in the unit field in the PPDU, and / or carry the signaling for demodulating the subsequent data. The IMMW-STF / LTF can be used for the first station to complete the preparation between the transmission of the data field and the two modes of beam training (or channel measurement or sensing). The synchronization field can be used for the second station to perform at least one of the following: completing the preparation of beam training (or channel measurement or sensing), time-frequency synchronization, phase tracking, or receiving link gain adjustment. The unit field is used for beam training or sensing or channel measurement. The description of the unit field can be referred to the above implementation modes 1-7, and will not be described in detail here.

[0240] The first station can transmit the fields before the synchronization field in the PPDU in an omni direction or a directional manner.

[0241] FIG. 13a-FIG. 13c are schematic diagrams of formats of the PPDU provided by the embodiments of the present application. As shown in FIG. 13a-FIG. 13c, the PPDU includes at least one of the following: IMMW-STF, IMMW-LTF, IMMW-SIG (or header), data field, IMMW-STF / LTF (FIG. 13a-FIG. 13c are examples of IMMW-STF), synchronization field, IMMW-STF / LTF (FIG. 13a-FIG. 13c are examples of IMMW-STF), or unit field. The dashed box shown in FIG. 13a-FIG. 13c is a unit field. FIG. 13a-FIG. 13c exemplarily show two unit fields.

[0242] As shown in FIG. 13a, the unit field includes IMMW-STF (an example of the third field shown above), first field 1, and first field 2. First field 1 corresponds to direction 1, and the number of repetitions is 2. First field 2 corresponds to direction 2, and the number of repetitions is 2. That is, different first fields in the unit field in FIG. 13a can correspond to different transmission beams.

[0243] As shown in FIG. 13b, each unit field includes one first field. That is, each unit field corresponds to one transmission beam, or the number of unit fields corresponding to the same transmission beam is 1. First field 1 and first field 2 belong to different unit fields. First field 1 corresponds to direction 1, and the number of repetitions is 3. First field 2 corresponds to direction 2, and the number of repetitions is 3.

[0244] As shown in FIG. 13c, each unit field includes one first field. First field 1 and first field 2 belong to different unit fields. First field 1 corresponds to direction 1, and the number of repetitions is 3. First field 2 corresponds to direction 1, and the number of repetitions is 3.

[0245] As shown in FIG. 13a-FIG. 13c, the fields before the first unit field in the PPDU can be in an omnidirectional or directional manner. FIG. 13a-FIG. 13c are examples of direction 0, which is not a limitation on the embodiments of the present application.

[0246] M=2, the number of second fields in the first field, the number of unit fields, etc. shown in FIG. 13a-FIG. 13c are only examples, which are not a limitation on the embodiments of the present application. FIG. 13a-FIG. 13c exemplarily show the specific manner of the combination of implementation manner 1-implementation manner 7, and other manners of combination are not listed here.

[0247] FIG. 14 is a schematic diagram of a format of a PPDU according to an embodiment of the present application. As shown in FIG. 14, the PPDU includes at least one of a legacy-short training field (L-STF), a legacy-long training field (L-LTF) (or a legacy-channel estimation field (L-CEF), a legacy signal (L-SIG) (or a header), an IMMW-STF, an IMMW-LTF, an IMMW-SIG (or a header), a data field, an IMMW-STF / LTF, a synchronization field, an IMMW-STF / LTF, or a unit field. FIG. 14 exemplarily shows two unit fields, and an ellipsis omits a larger number of unit fields.

[0248] For example, the L-STF can be used for discovery of the PPDU, coarse synchronization, automatic gain control, etc. The L-LTF can be used for fine synchronization, channel estimation, etc. The L-SIG can be used to carry information related to a length of the PPDU, etc. Other descriptions about FIG. 14 can be referred to FIG. 12, etc., and will not be repeated here.

[0249] In an embodiment of the present application, the first field in the PPDU corresponds to a transmission beam which can be determined by the first information and / or the first index information, and the number of repetitions of the transmission beam can be determined by the second information. The transmission beam corresponding to the first field and the number of repetitions of the transmission beam can be referred to FIG. 2, and will not be repeated here.

[0250] Optionally, the PPDU in the sensing measurement interaction is N PPDU, and the transmission beam and the number of repetitions of the transmission beam of the N PPDU, and the reception beam and the number of repetitions of the reception beam of the N PPDU can satisfy that an operation result of the transmission beam and the number of repetitions of the transmission beam is equal to an operation result of the reception beam and the number of repetitions of the reception beam. Optionally, the PPDU in the sensing measurement session is N PPDU, and the transmission beam and the number of repetitions of the transmission beam of the N PPDU, and the reception beam and the number of repetitions of the reception beam of the N PPDU can satisfy that an operation result of the transmission beam and the number of repetitions of the transmission beam is equal to an operation result of the reception beam and the number of repetitions of the reception beam. The description about the N PPDU can be referred to FIG. 2, and will not be repeated here.

[0251] The names or lengths or positions of various fields in the PPDU shown in the embodiments of the present application are only examples and are not intended to limit the embodiments of the present application. The embodiments of the present application are illustrated by taking fields as examples, and the fields, subfields, elements or subelements are not specifically distinguished, but this should not be considered as limiting the embodiments of the present application. The unit of the length of each field can be bits, bytes, or double bytes, which is not limited in the embodiments of the present application. In the embodiments of the present application, the fields shown in the dashed lines in the drawings are optional fields.

[0252] In a possible implementation, the standard can define a format of the PPDU, such as the format of the PPDU can be any one of FIG. 13a-13c, or the format of part of the fields in the PPDU can be any one of the above-mentioned multiple ways.

[0253] In a possible implementation, the standard can define multiple formats of the PPDU, such as the format of the PPDU can be at least two of FIG. 13a-13c, or the format of part of the fields in the PPDU can be multiple ways as shown above. In this case, the first station can select different formats of the PPDU according to different scenarios. Alternatively, the first station can indicate the format of the PPDU to the second station through indication information, and the second station receives the indication information to determine the format of the PPDU. Alternatively, the second station can indicate the format of the PPDU to the first station through indication information, and the first station receives the indication information to determine the format of the PPDU. FIG. 15 below is illustrated by taking the first station indicating the format of the PPDU to the second station as an example, which is not intended to limit the embodiments of the present application.

[0254] FIG. 15 is a flowchart of a method for indicating a PPDU according to an embodiment of the present application. The first station and the second station involved in the indication method can refer to the above, which will not be described in detail here. As shown in FIG. 15, the method includes:

[0255] 1501. The first station sends indication information, which is used to indicate the structure of the PPDU. Correspondingly, the second station receives the indication information.

[0256] The PPDU can be used for beam training, or for sensing, or for channel measurement. In other words, the PPDU can be a PPDU for sensing, or a PPDU for beam training, or a PPDU for channel measurement.

[0257] In a possible implementation, before the first station sends the indication information, the indication information can also be determined.

[0258] In a possible implementation, after receiving the indication information, the second station can further parse the indication information. By parsing the indication information, the second station can learn the structure of the PPDU.

[0259] As an example, the indication information is contained in a control frame of the PPDU. The description about the control frame can refer to the description in FIG. 2, which will not be repeated here.

[0260] As another example, the indication information is contained in a physical layer header of the PPDU. The physical layer header can include a SIG field, or a header field. As for an IMMW PPDU, the physical layer header can include an IMMW-SIG field or an IMMW-header field.

[0261] The content of the indication information related to the embodiments of the present application is introduced as follows.

[0262] In a possible implementation, the indication information is used to indicate at least one of the following: the order of the second stations corresponding to the M synchronization subfields, the value of M, the number of unit fields in the PPDU, the number of first fields in the unit field, the number of second fields in the first field, or the number of LTF symbols in the LTF field in the second field.

[0263] In a possible implementation, the indication information is further used to indicate at least one of the following:

[0264] whether the unit field includes M third fields, or the number of symbols in each of the M third fields, the number of symbols being greater than or equal to 0, whether the PPDU includes a fourth field, or the number of symbols in the fourth field, the number of symbols being greater than or equal to 0, or whether the PPDU includes a fifth field, or the number of symbols in the fifth field, the number of symbols being greater than or equal to 0. The description about the fifth field can refer to the fourth field, which will not be described in detail below.

[0265] The above content indicated by the indication information can be implemented by multiple fields, one field can carry one information, or one field can carry two information, etc., which will not be listed one by one here. The field A, field B, etc. shown below are named to distinguish different fields, and the specific names of the field A to the field J are not limited in the embodiments of the present application.

[0266] In the embodiments of the present application, the length unit of the unit field can be the number of symbols, or the number of bits, or the number of bytes, etc., which are not limited in the embodiments of the present application. For the convenience of description, the number of symbols is taken as an example for description in the following specific examples. Optionally, the LTF symbol and the STF symbol can be collectively referred to as an orthogonal frequency division multiplexing (OFDM) symbol. The time length of one LTF symbol and one STF symbol can be the same or different, which is not limited in the embodiments of the present application.

[0267] As a possible implementation, the indication information includes at least one of the fields (1)-(6) shown below.

[0268] (1) The number of unit fields in the PPDU:

[0269] The number of unit fields in the PPDU can be carried in the field A. For example, the field A can be referred to as a unit length field. For example, for the IMMW PPDU, the field A can also be referred to as an IMMW unit length field.

[0270] As an example, the value of the field A is the number of unit fields. For example, if the field A occupies n bits, the value of the field A is 0-2 n -1. That is, the number of unit fields in the PPDU ranges from 0 to 2 n -1.

[0271] As another example, the value of the field A+1 is the number of unit fields. For example, if the field A occupies n bits, the value of the field A is 0-2 n -1. When the value of the field A is 0, the number of unit fields in the PPDU is 1. When the value of the field A is 2 n -1, the number of unit fields in the PPDU is 2 n For the convenience of description, the lengths of different fields shown in the following are taken as an example for description, but the lengths of different fields can be different in specific implementation.

[0272] As yet another example, the relationship between the value of the field A and the number of unit fields in the PPDU is discrete. For example, the value of the field A can correspond to a discrete value. The relationship between the value of the field A and the number of unit fields in the PPDU is as follows: when the value of the field A is a first value, the number of unit fields in the PPDU is 0; when the value of the field A is a second value, the number of unit fields in the PPDU is 2; when the value of the field A is a third value, the number of unit fields in the PPDU is 4, etc., which are not listed one by one here.

[0273] The embodiments of the present application do not limit the relationship between the value of the field and the quantity corresponding to the value. The relationship between the value of the field and the quantity listed above also applies below, which will not be repeated here.

[0274] (2) Quantity of the first field in the unit field:

[0275] The quantity of the first field in the unit field can be carried in field B. As for the IMMW PPDU, field B can also be referred to as an IMMW user block quantity field, etc. The specific name of field B is not limited in the embodiments of the present application.

[0276] The quantity of the first field in the unit field indicated by field B ranges from 1 to 2 n , or a discrete quantity, etc. n is the length of field B. The relationship between the value of field B and the quantity corresponding to the value can be referred to in (1) above, which will not be described here.

[0277] Optionally, the quantity of the first field in each unit field is the same. This structure is simple and has low complexity.

[0278] (3) Second field:

[0279] The structure of the first field can be indicated by the Rep field and the NSTS field. For example, the quantity of the second field in the first field can be carried in the Rep field, that is, the Rep field can be used to indicate the repetition number of the transmission beam corresponding to the first field. The number of LTF symbols in the second field can be carried in the NSTS field.

[0280] The quantity of the second field indicated by the Rep field can range from 1 to 2 n , or a discrete quantity, etc. n is the length of the Rep field. When the value of the Rep field is 0, the quantity of the second field is 1.

[0281] The NSTS field can be used to indicate the number of spatial streams or the number of space-time streams. For example, the number of spatial streams indicated by the NSTS field ranges from 1 to 2 n . n is the length of the NSTS field. A single second field can include one or more LTF symbols, which can be determined by the number of spatial streams or the number of space-time streams. Optionally, when multiple-input multiple-output (MIMO) is not supported, the indication information does not include the NSTS field.

[0282] For example, the Rep field and the NSTS field can be included in the physical layer header of the control frame or the management frame or the PPDU. The description of the control frame or the management frame can be referred to above, which will not be described here.

[0283] (4) Third field:

[0284] whether M third fields are included in the unit field or the number of symbols in each of the M third fields can be carried in field C. As for IMMW PPDU, field C can also be referred to as IMMW field C.

[0285] When the third field is STF, field C can be used to indicate whether M STF fields are included in the unit field in the PPDU or the number of STF symbols in each STF field.

[0286] When the third field is LTF, field C can be used to indicate whether M LTF fields are included in the unit field in the PPDU or the number of LTF symbols in each LTF field.

[0287] Optionally, field C can be used to indicate whether M third fields are included in the unit field in the PPDU. In the case where field C indicates that M third fields are included in the unit field, the number of symbols in the third field can be defined by the standard, or determined by the sensing initiator, etc., which is not limited by the embodiments of the present application.

[0288] Optionally, field C can be used to indicate the number of symbols in each third field. The number of symbols indicated by field C can range from 0 to 2 n -1; or 1-2 n ; or a discrete number, etc. n is the length of field C. When the number of symbols is 0, it means that the third field is not included in the unit field. The relationship between the value of field C and the number corresponding to the value can be referred to in the above (1), which will not be described in detail here.

[0289] Optionally, the number of symbols in each third field is the same. Optionally, there can be at least two third fields in the M third fields, and the number of symbols in the third fields is different. For example, field C can include M sub-fields C, and each sub-field C can be used to indicate the number of symbols in the corresponding third field.

[0290] (5) Fourth field:

[0291] whether the fourth field is included in the PPDU or the number of symbols in the fourth field can be carried in field D. As for IMMW PPDU, field D can also be referred to as IMMW field D.

[0292] When the fourth field is STF, field D can be used to indicate whether an STF field is included before the first unit field in the PPDU or the number of STF symbols in the STF field.

[0293] When the fourth field is LTF, field D can be used to indicate whether an LTF field is included before the first unit field in the PPDU or the number of LTF symbols in the LTF field.

[0294] Optionally, field D can be used to indicate whether a fourth field is included before the first unit field in the PPDU. In case field D indicates that the fourth field is included in the PPDU, the number of symbols in the fourth field can be defined by the standard, or determined by the sensing initiator, etc. The embodiments of the present application do not limit this.

[0295] Optionally, field D can be used to indicate the number of symbols in the fourth field. The number of symbols indicated by field D can range from 0 to 2 n -1; or 1-2 n ; or a discrete number, etc. n is the length of field D. When the number of symbols is 0, it means that the fourth field is not included in the PPDU. The relationship between the value of field D and the number corresponding to the value can refer to (1) above, which will not be described here.

[0296] (6) The order of the second stations corresponding to the M synchronization subfields:

[0297] The order of the second stations corresponding to the M synchronization subfields can be carried in field E. For example, field E can be referred to as a STA ID field.

[0298] As an example, field E is used to indicate the order or index of the second station in this beam training (or channel measurement or sensing measurement). Alternatively, field E is used to indicate the ID of the synchronization sequence assigned to the second station in this beam training (or channel measurement or sensing measurement). The order or index of each second station is different for this beam training (or channel measurement or sensing measurement). Optionally, field E and fields A-D above can be carried in different indication information. For different second stations, the first station can send different fields E, which are used to indicate the order or index of the second station. For example, field E can be carried in a sensing measurement request frame, or a DMG sensing request frame, etc.

[0299] As another example, field E can be used to indicate the correspondence between the ID (or index) of the second station and the order. For example, field E includes M subfields E, each of which includes the ID of the second station and the order of the second station in the M second stations. Field E and fields A-D above can be carried in different indication information, or fields A-D above can be carried in the same indication information.

[0300] Optionally, field E can also be used to indicate the order of the second stations corresponding to the M third fields in the unit field.

[0301] As an example, the value of M is a fixed value. For example, M=2, or M=3, or M=4, etc. which will not be listed one by one here.

[0302] As another example, the indication information can further comprise a field F, which is used to indicate the value of M. For example, the value of field F = M. As another example, the value of field F + 1 = M. As yet another example, the relationship between the value of field F and the value of M is discrete.

[0303] The field E and the field F can be carried in the same indication information. For example, the field E and the field F can be carried in the perception measurement request frame, or the field E and the field F can be carried in the DMG perception request frame, etc. For the field F, other descriptions can refer to the field E. For example, the field F can be carried in different indication information from the fields A to D, or the field F can be carried in the same indication information as the fields A to D.

[0304] Through the field E and the field F, the second station can determine the number of second stations participating in the current beam training (or channel measurement or perception), and the ranking or index assigned to the second station itself. Alternatively, through the field E and the field F, the second station can determine the position of the synchronization subfield corresponding to the second station in the synchronization field. Optionally, the second station can also determine the position of the third field corresponding to the second station in the unit field.

[0305] Through the field E and the field F, the second station can also determine the number of synchronization subfields remaining after the synchronization subfield corresponding to the second station, so as to determine the starting position of the first unit field in the PPDU. In addition, the second station can also determine the position of the third field corresponding to the second station in the unit field, and the starting position of the first first field in the unit field. Thus, the second station can perform beam training (or channel measurement or perception) according to the first field.

[0306] The descriptions of the field E and the field F herein also apply to the following (a) to (f) (as they also apply to the following (a) to (f)), which will not be repeated here.

[0307] In the embodiments of the present application, through the fields (1) to (6) described above, the second station can determine the structure of the PPDU.

[0308] Optionally, the number of transmission beams corresponding to the unit field is a fixed value. For example, the number of transmission beams corresponding to each unit field can be equal to the number of first fields in the unit field, that is, the number of first fields corresponding to the same transmission beam in each unit field is 1. As another example, the number of transmission beams corresponding to each unit field can be equal to 3, or equal to the number of first fields in the unit field / 2. For example, the number of first fields corresponding to the same transmission beam in each unit field is 2. The above fixed value can be defined by the standard, or indicated by the indication information shown above, etc.

[0309] Optionally, the number of first fields corresponding to the same transmit beam is a fixed value. For example, the number of first fields corresponding to the same transmit beam in a unit field is 1, or 2, and so on, which are not listed one by one here.

[0310] Optionally, the number of unit fields corresponding to the same transmit beam is a fixed value. For example, the number of unit fields corresponding to the same transmit beam is 1, or 2, or 3, and so on, which are not listed one by one here.

[0311] In a possible implementation, the indication information is used to indicate at least one of the following: the number of transmit beams corresponding to a unit field (or the number of transmit beams in a unit field); the number of first fields corresponding to the same transmit beam; the number of unit fields corresponding to the same transmit beam.

[0312] The number of first fields in a unit field = the number of transmit beams corresponding to the unit field, which means that each first field in the unit field corresponds to a transmit beam, and the number of first fields corresponding to the same transmit beam is 1.

[0313] The number of first fields in a unit field > the number of transmit beams corresponding to the unit field, which means that there are at least two first fields in the unit field, and the at least two first fields correspond to the same transmit beam.

[0314] The indication information can include at least one of the fields shown in (7) to (9) below.

[0315] (7) The number of transmit beams corresponding to a unit field:

[0316] In the embodiments of the present application, one first field can correspond to one transmit beam, and the number of first fields corresponding to the same transmit beam can be one or more. Therefore, one unit field can correspond to one or more transmit beams, or in other words, the number of transmit beams in one unit field can be one or more.

[0317] The number of transmit beams corresponding to a unit field can be carried in field G. In other words, field G is used to indicate the number of transmit beams in a unit field. For example, for an IMMW PPDU, field G can also be referred to as an IMMW field G, or an IMMW-DIR field.

[0318] The number of transmit beams indicated by the field G ranges from 0 to 2 n -1; or 1 to 2 n ; or a discrete number, and so on. n is the length of field G. The relationship between the value of field G and the number corresponding to the value can refer to (1) above, which will not be described in detail here.

[0319] Optionally, the number of first fields in each unit field is the same. Optionally, when the number of first fields corresponding to the same transmit beam is 1, the indication information comprises field G, or field B. That is, field G indicates the number of transmit beams in the unit field is equal to the number of first fields in the unit field indicated by field B.

[0320] (8) The number of first fields corresponding to the same transmit beam:

[0321] The number of first fields corresponding to the same transmit beam can be carried in field H. In other words, field H is used to indicate the number of first fields transmitted in each direction in a unit field. As for IMMW PPDU, field H can also be referred to as IMMW field H.

[0322] The number of first fields corresponding to the same transmit beam indicated by field H can range from 1 to 2 n ; or a discrete number, etc. n is the length of field H. The relationship between the value of field H and the number corresponding to the value can refer to (1) above, which will not be described in detail here.

[0323] Field B can be used to indicate the number of first fields in a unit field. Field G and field H can also be used to indicate the number of first fields in a unit field. The number of first fields in a unit field = the number of transmit beams in the unit field indicated by field G * the number of first fields corresponding to the same transmit beam indicated by field H.

[0324] (9) The number of unit fields corresponding to the same transmit beam:

[0325] The number of unit fields corresponding to the same transmit beam can be carried in field I. In other words, field I is used to indicate how many unit fields correspond to the same transmit beam. As for IMMW PPDU, field I can also be referred to as IMMW field I.

[0326] The number of unit fields corresponding to the same transmit beam indicated by field I can range from 1 to 2 n ; or a discrete number, etc. n is the length of field I. The relationship between the value of field I and the number corresponding to the value can refer to (1) above, which will not be described in detail here.

[0327] Optionally, the number of unit fields corresponding to the same transmit beam indicated by field I = 1, which means that each unit field corresponds to one transmit beam, and different unit fields correspond to different transmit beams. The first field in each unit field corresponds to the same transmit beam.

[0328] Optionally, the number of unit fields corresponding to the same transmit beam indicated by field I = the number of unit fields indicated by field A, which means that each unit field in the PPDU corresponds to the same transmit beam.

[0329] Through the above fields G-I, the relationship between the first field and the transmit beam, or the relationship between the unit field and the transmit beam can be indicated more clearly.

[0330] In the embodiments of the present application, the fields included in the indication information can be different for different structures of the PPDU. In this case, the fields not involved will not appear in the indication information. Alternatively, the fields included in the indication information can be the same for different structures of the PPDU. In this case, the fields not involved are reserved fields. The description of the PPDU and the fields herein also applies to the fields (a)-(f) shown below, which will not be repeated here.

[0331] In a possible implementation, the indication information is used to indicate the information about the relationship between the first field and the transmit beam, or the information about the relationship between the unit field and the transmit beam. For example, the indication information is used to indicate that each unit field in the PPDU corresponds to multiple transmit beams (as shown in FIG. 13a) (for example, the unit field includes multiple first fields, the number of first fields corresponding to the same transmit beam is 1, or the number of first fields corresponding to the same transmit beam is 2, etc.); or used to indicate that each unit field in the PPDU corresponds to one transmit beam, and the number of unit fields corresponding to the same transmit beam is 1 (as shown in FIG. 13b); or used to indicate that all unit fields in the PPDU correspond to the same transmit beam (as shown in FIG. 13c).

[0332] For example, the indication information can be carried in field J. The relationship between the value of field J and the meaning is as follows: the value of field J is 0, the structure of the PPDU is as shown in FIG. 13a; the value of field J is 1, the structure of the PPDU is as shown in FIG. 13b; the value of field J is 2, the structure of the PPDU is as shown in FIG. 13c. Of course, the relationship between the value of field J and the meaning shown herein is only an example, and does not limit the embodiments of the present application. The description of field J herein also applies to the fields (a)-(f) shown below, which will not be repeated here.

[0333] Through the above field J, the relationship between the first field and the transmit beam, or the relationship between the unit field and the transmit beam can be indicated more concisely, the format of the indication information can be simplified, and the signaling overhead can be saved.

[0334] The fields shown above, such as field A to field J, can be carried in the same information, such as indication information; or, the fields A to field J can also be carried in different information, such as part of the fields are carried in header-A in the PPDU, and another part of the fields are carried in header-B in the PPDU; or, the fields A to field J are carried in control frames of the PPDU, such as all carried in the same control frame, or part of the fields are carried in control frame 1, and another part of the fields are carried in control frame 2, and the like. For example, when the values in all the sensing measurement interactions in a sensing measurement session are the same, the corresponding fields can be carried in a management frame, such as a sensing measurement request frame. When the values in the sensing measurement interactions are different, the corresponding fields can be carried in a control frame, such as a DMG sensing request frame or a sensing NDPA frame or a sounding trigger frame, and the like, which are not listed one by one here. The values shown here can be the values or contents indicated by the fields A to field I above. The specific positions or names of the fields are not limited in the embodiments of the present application. The description about the field positions here is also applicable to the fields shown in (a) to (f) below, and the following will not be repeated.

[0335] In the embodiments of the present application, the second station can determine the structure of the single unit field according to the field B, the Rep field, the NSTS field and the field C, determine the structure of the third field in the unit field according to the field E and the field F, and obtain the transmission beam situation in the unit field according to the field G to field I, and determine the number of the unit fields in the PPDU according to the field A, and determine the structure after the data field in the PPDU in combination with the field D, the field E and the field F. Thus, the second station can accurately parse the PPDU. Optionally, the PPDU can not include the data field.

[0336] As another possible implementation, the indication information includes at least one of the fields shown in (a) to (f) below.

[0337] (a) The number of the unit fields in the PPDU:

[0338] The number of the unit fields in the PPDU can be carried in the field A. The description about the number of the unit fields in the PPDU can refer to the description of (1) above, and will not be repeated here.

[0339] (b) The second field:

[0340] The structure of the first field can be indicated by the Rep field and the NSTS field. The description about the second field can refer to the description of (3) above, and will not be repeated here.

[0341] (c) The number of fields and the number of symbols in the unit field:

[0342] The number of fields in each unit field can be carried in field K. The number of fields indicated by field K can range from 1 to 2 n , or be a discrete number, etc. n is the length of field K.

[0343] Field L is used to indicate the total number of symbols of the first field in each unit field. Alternatively, field L is used to indicate the number of second fields in each unit field. Alternatively, field L is used to indicate the number of first fields in each unit field.

[0344] As an example, taking the case where field L is used to indicate the total number of symbols of the first field in each unit field, the number of symbols indicated by field L can range from 1 to 2 n , or be a discrete number, etc. n is the length of field L. When the number of first fields corresponding to the same transmission beam is 1, the number of transmission beams corresponding to each unit field is equal to (the number of symbols indicated by field L) / (the number of spatial streams indicated by field NSTS * the number of repetitions indicated by field Rep). Alternatively, when the number of first fields corresponding to the same transmission beam is greater than 1, the indication information can further include field H. The number of transmission beams corresponding to each unit field is equal to (the number of symbols indicated by field L) / (the number of spatial streams indicated by field NSTS * the number of repetitions indicated by field Rep * the number of first fields indicated by field H).

[0345] As another example, taking the case where field L is used to indicate the number of second fields in each unit field, the number of second fields indicated by field L can range from 1 to 2 n , or be a discrete number, etc. n is the length of field L. When the number of first fields corresponding to the same transmission beam is 1, the number of transmission beams corresponding to each unit field is equal to (the number of second fields indicated by field L) / (the number of repetitions indicated by field Rep). Alternatively, when the number of first fields corresponding to the same transmission beam is greater than 1, the indication information can further include field H. The number of transmission beams corresponding to each unit field is equal to (the number of second fields indicated by field L) / (the number of repetitions indicated by field Rep * the number of first fields corresponding to the same transmission beam indicated by field H).

[0346] As yet another example, taking the case where field L is used to indicate the number of first fields in each unit field, the number of first fields indicated by field L can range from 1 to 2 n, or the number of the first fields corresponding to the same transmit beam is greater than 1. The number of the transmit beams corresponding to each unit field is equal to the number of the first fields indicated by the field L / the number of the first fields corresponding to the same transmit beam indicated by the field H.

[0347] (d) the third field:

[0348] Whether the M third fields are included in the unit field, or the number of the symbols in each of the M third fields is carried in the field C. The description about the third field can refer to the description of (4) above, and is not repeated here.

[0349] (e) the fourth field:

[0350] Whether the fourth field is included before the first unit field in the PPDU, or the number of the symbols in the fourth field can be carried in the field D. The description about the fourth field can refer to the description of (5) above, and is not repeated here.

[0351] (f) the number of the unit fields corresponding to the same transmit beam:

[0352] The number of the unit fields corresponding to the same transmit beam can be carried in the field I. The description about the field I can refer to the description of (9) above, and is not repeated here.

[0353] The details not described in detail above can refer to other places.

[0354] The length of the PPDU related to the embodiments of the present application is introduced below.

[0355] In a possible implementation, the length of the PPDU increases with the increase of the number M of the second stations. As in the case that the length of the third field corresponding to each second station is the same, the length of a single unit field increases with the increase of the number of the second stations.

[0356] The length of the unit field is determined by the value of M, the number of the symbols in the third field, the number of the first fields, and the number of the second fields in the first field. The length unit of the unit field can be the number of the symbols, or the number of the bits, or the number of the bytes, etc., which is not limited by the embodiments of the present application. For the convenience of description, the number of the symbols is taken as an example for description when the specific examples are introduced below. And the number of the symbols in each first field is the same, and the number of the first fields in each unit field is the same, which are taken as examples when the specific examples are introduced below, but are not as a limitation to the embodiments of the present application.

[0357] For example, the length of one unit field = M*(the number of symbols in the third field) + the number of second fields in the first field*(the number of symbols in the second field)* the number of first fields in the unit field. M represents the number of second stations, such as the number of sensing receivers participating in sensing. The length of the unit field in the PPDU = the number of unit fields*[M*(the number of symbols in the third field) + the number of second fields in the first field*(the number of symbols in the second field)* the number of first fields in the unit field].

[0358] In combination with the various fields shown above, the length of the unit field can be as follows:

[0359] For example, the length of one unit field = M*(the number of symbols in the third field indicated by field C) + the number of second fields indicated by Rep field*NSTS field*(the number of symbols in the second field) * the number of first fields indicated by field B. Alternatively, the length of one unit field = M*(the number of symbols in the third field indicated by field C) + the number of second fields indicated by Rep field*NSTS field*(the number of symbols in the second field) * the number of first fields corresponding to the same transmit beam indicated by field G*the number of first fields corresponding to the same transmit beam indicated by field H.

[0360] For another example, the length of one unit field = M*(the number of symbols in the third field indicated by field C) + the total number of first fields in one unit field indicated by field L. Alternatively, the length of one unit field = M*(the number of symbols in the third field indicated by field C) + the number of first fields in one unit field indicated by field L*(the number of second fields indicated by Rep*NSTS field*(the number of symbols in the second field)). Alternatively, the length of one unit field = M*(the number of symbols in the third field indicated by field C) + the number of second fields in one unit field indicated by field L*NSTS field*(the number of symbols in the second field) (i.e., the number of spatial streams indicated by NSTS field).

[0361] In a possible implementation, the maximum length of the unit field is fixed, thereby simplifying the design.

[0362] The length of one unit field is determined by the number of symbols in the third field indicated by the field C, the number of first fields indicated by the field B, the number of second fields indicated by the field Rep, and the number of symbols in each second field indicated by the field NSTS. For example, the length of one unit field = the number of symbols in the third field indicated by the field C + the number of first fields indicated by the field B * (the number of second fields indicated by the field Rep * the number of symbols in the second field indicated by the field NSTS). The M-1 third fields corresponding to the M-1 second stations occupy the following number of symbols: the number of first fields indicated by the field B * (the number of second fields indicated by the field Rep * the number of symbols in the second field indicated by the field NSTS).

[0363] Alternatively, the length of one unit field is determined by the number of symbols in the third field indicated by the field C and the number of symbols indicated by the field L. For example, the length of one unit field = the number of symbols in the third field indicated by the field C + the number of symbols indicated by the field L. The M-1 third fields corresponding to the M-1 second stations occupy the following number of symbols: the number of symbols indicated by the field L.

[0364] That is, when the maximum length of the fixed unit field is determined, the M-1 third fields need to occupy the number of symbols of the first field.

[0365] Alternatively, the number of symbols of the third field = the number of symbols of one LTF in the second field, and the following relationship needs to be met: M * the number of symbols of the third field < the number of symbols of the third field + the number of symbols indicated by the field L. That is, (M-1) * the number of symbols of the third field < the number of symbols indicated by the field L. Thus, it can be ensured that there is a first field in the unit field.

[0366] Alternatively, the number of symbols of the third field ≠ the number of symbols of one LTF in the second field, for example, the number of symbols of one LTF = K * the number of symbols of the third field. K is a positive integer, for example, K = 2, or 3, and the like, which are not listed one by one here. The following relationship needs to be met: M * the number of symbols of the third field < the number of symbols of the third field + the number of symbols indicated by the field L. That is, (M-1) * the number of symbols of the third field < the number of symbols indicated by the field L. The relationship can be further simplified as the value of K, which is not described in detail here.

[0367] The communication device provided by the embodiments of the present application will be described below.

[0368] The present application divides the functional modules of the communication device according to the above method embodiments. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be realized in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical functional division. In actual implementation, there can be another division manner. The communication device of the embodiments of the present application will be described in detail below with reference to FIGS. 16-18.

[0369] FIG. 16 is a structural schematic diagram of a communication device according to an embodiment of the present application. As shown in FIG. 16, the communication device includes a processing module 1601 and a transceiver module 1602. The transceiver module 1602 can realize corresponding communication functions, and the processing module 1601 is configured to realize corresponding processing functions. The transceiver module 1602 can also be referred to as an interface, a communication interface, or a communication module, etc.

[0370] In some embodiments of the present application, the communication device can be configured to perform the actions performed by the first station in the above method embodiments. At this time, the first station can be the device itself or a chip or a functional module configured in the device, etc. The transceiver module 1602 is configured to perform the transceiving related operations of the first station in the above method embodiments, and the processing module 1601 is configured to perform the processing related operations of the first station in the above method embodiments.

[0371] As an example, the processing module 1601 is configured to generate N PPDU, and the transceiver module 1602 is configured to send or output the N PPDU. The description of the N PPDU can refer to FIGS. 2-4, etc. above, which will not be described in detail here.

[0372] As another example, the processing module 1601 is configured to generate a PPDU, and the transceiver module 1602 is configured to send or output the PPDU. The description of the PPDU can refer to FIG. 6, implementation mode 1-implementation mode 7, etc. above, which will not be described in detail here.

[0373] As yet another example, the processing module 1601 is configured to determine indication information, and the transceiver module 1602 is configured to send or output the indication information. Alternatively, the transceiver module 1602 is configured to receive or input the indication information.

[0374] Referring to FIG. 16, in some other embodiments of the present application, the communication device can be configured to perform the actions performed by the second station in the above method embodiments. At this time, the second station can be the device itself or a chip or a functional module configured in the device, etc. The transceiver module 1602 is configured to perform the transceiving related operations of the second station in the above method embodiments, and the processing module 1601 is configured to perform the processing related operations of the second station in the above method embodiments.

[0375] As an example, the transceiver module 1602 is configured to receive N PPDU, and the processing module 1601 is configured to parse the N PPDU. The description of the N PPDU can refer to the above description of FIG. 2 to FIG. 4, and will not be repeated here.

[0376] As another example, the transceiver module 1602 is configured to receive a PPDU, and the processing module 1601 is configured to parse the PPDU. The description of the PPDU can refer to the above description of FIG. 6, the implementation mode 1 to the implementation mode 7, and will not be repeated here.

[0377] As yet another example, the transceiver module 1602 is configured to receive indication information, and the processing module 1602 is configured to parse the indication information. Alternatively, the processing module 1601 is configured to determine the indication information, and the transceiver module 1602 is configured to send or output the indication information.

[0378] For example, the transceiver module 1602 described above can be an antenna module. For another example, the transceiver module 1602 described above can be an input / output module. Optionally, in each of the above embodiments, the communication device can further include a storage module, which can be configured to store instructions and / or data, and the processing module 1601 can read the instructions and / or data in the storage module to enable the communication device to implement the above method embodiments.

[0379] In each of the above embodiments, the specific description of each term or name or step can refer to the above description of the method embodiments, and will not be repeated here.

[0380] The specific description of the transceiver module and the processing module shown in each of the above embodiments is only an example. For the specific functions or steps of the transceiver module and the processing module, please refer to the above method embodiments, and will not be repeated here.

[0381] It can be understood that the division of the modules in the above device is only a logical function division. Each function can correspond to a function module, or two or more functions can be integrated into one function module. In actual implementation, all or part of the modules can be integrated into one physical entity, or can be distributed in different physical entities. In addition, the function modules can be realized in the form of hardware, software, or a combination of hardware and software.

[0382] In one example, the functional units in any of the above apparatuses can be one or more integrated circuits configured to implement the above methods, for example, one or more application specific integrated circuits (ASICs), or, one or more central processing units (CPUs), one or more microcontroller units (MCUs), one or more digital signal processors (DSPs), or, one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0383] The communication apparatus of the embodiments of the present application is introduced above, and possible product forms of the communication apparatus are introduced below. Any product form with the functions of the communication apparatus described in FIG. 16 falls within the protection scope of the embodiments of the present application. The introduction below is only for example, and does not limit the product form of the communication apparatus of the embodiments of the present application.

[0384] In a possible implementation, in the communication apparatus shown in FIG. 16, the processing module 1601 can be one or more processors, and the transceiver module 1602 can be a transceiver, or the transceiver module 1602 can also be a sending module and a receiving module, the sending module can be a transmitter, and the receiving module can be a receiver, and the sending module and the receiving module are integrated in one device, for example, a transceiver. In the embodiments of the present application, the processor and the transceiver can be coupled, and the connection manner of the processor and the transceiver is not limited in the embodiments of the present application. In the process of executing the above method, the process of sending information in the above method can be the process of outputting the above information by the processor. When the above information is output, the processor outputs the above information to the transceiver, so as to be transmitted by the transceiver. After the above information is output by the processor, it can also need to be processed further, and then reaches the transceiver. Similarly, the process of receiving information in the above method can be the process of receiving the input above information by the processor. When the processor receives the input information, the transceiver receives the above information and inputs it to the processor. Further, after the transceiver receives the above information, the above information can need to be processed further, and then input to the processor.

[0385] FIG. 17 is another structural schematic diagram of the communication apparatus provided by the embodiments of the present application. As shown in FIG. 17, the communication apparatus 170 includes one or more processors 1720 and a transceiver 1710.

[0386] In some embodiments of the present application, the communication device can be configured to perform the steps or methods or functions performed by the first station, e.g., the processor 1720 can be configured to perform the functions or steps implemented by the processing module 1601 as shown in FIG. 16, and the transceiver 1710 can be configured to perform the functions or steps implemented by the transceiving module 1602 as shown in FIG. 16. For the detailed description of the processor 1720 and the transceiver 1710, reference can be made to FIG. 16 or the method embodiments described above, and thus no further elaboration is provided herein.

[0387] In some embodiments of the present application, the communication device can be configured to perform the steps or methods or functions performed by the first station, e.g., the processor 1720 can be configured to perform the functions or steps implemented by the processing module 1601 as shown in FIG. 16, and the transceiver 1710 can be configured to perform the functions or steps implemented by the transceiving module 1602 as shown in FIG. 16. For the detailed description of the processor 1720 and the transceiver 1710, reference can be made to FIG. 16 or the method embodiments described above, and thus no further elaboration is provided herein.

[0388] In the various implementations of the communication device shown in FIG. 17, the transceiver can include a receiver configured to perform the functions (or operations) of receiving and a transmitter configured to perform the functions (or operations) of transmitting. The transceiver is configured to communicate with other devices / apparatuses over a transmission medium.

[0389] Optionally, the communication device 170 can further include one or more memories 1730 configured to store program instructions and / or data. The memory 1730 is coupled to the processor 1720. The coupling between the components, units or modules in the embodiments of the present application can be indirect coupling or communication connection therebetween, which can be electrical, mechanical or other forms, for information interaction between the components, units or modules. The processor 1720 can operate in cooperation with the memory 1730. The processor 1720 can execute the program instructions stored in the memory 1730. Optionally, at least one of the one or more memories can be included in the processor.

[0390] The specific connection medium between the transceiver 1710, the processor 1720 and the memory 1730 in the embodiments of the present application is not limited. In FIG. 17, the memory 1730, the processor 1720 and the transceiver 1710 are connected through a bus 1740, which is represented by a thick line in FIG. 17, and the connection mode between other components is only schematically illustrated and is not limited. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, only one thick line is used in FIG. 17, but it does not mean that there is only one bus or only one type of bus.

[0391] In the embodiments of the present application, the processor can be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as execution completed by a hardware processor, or executed by a combination of hardware and software modules in the processor, etc.

[0392] In the embodiments of the present application, the memory can include, but is not limited to, a non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), a random access memory (RAM), an erasable programmable ROM (EPROM), a read-only memory (ROM) or a compact disc read-only memory (CD-ROM), etc. The memory can be any storage medium capable of carrying or storing program codes in the form of instructions or data structures and capable of being read and / or written by a computer (such as the communication device shown in the present application, etc.), but is not limited thereto. The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, used for storing program instructions and / or data.

[0393] The processor 1720 is mainly used for processing communication protocols and communication data, and controlling the whole communication device, executing software programs, and processing data of the software programs. The memory 1730 is mainly used for storing software programs and data. The transceiver 1710 can include a control circuit and an antenna, and the control circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by users and outputting data to users.

[0394] When the communication apparatus is powered on, the processor 1720 can read a software program in the memory 1730, interpret and execute instructions of the software program, and process data of the software program. When data needs to be transmitted wirelessly, the processor 1720 outputs a baseband signal to the radio frequency circuit after baseband processing of the data to be transmitted, and the radio frequency circuit converts the baseband signal into a radio frequency signal and transmits the radio frequency signal in the form of an electromagnetic wave through an antenna. When data is transmitted to the communication apparatus, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1720, and the processor 1720 converts the baseband signal into data and processes the data.

[0395] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processor that performs baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication apparatus.

[0396] The communication apparatus shown in the embodiments of the present application can also have more components than those shown in FIG. 17, and the embodiments of the present application do not limit this. The methods performed by the processor and the transceiver shown above are only examples, and the specific steps performed by the processor and the transceiver can refer to the methods described above. The optional part in FIG. 17 is indicated by a dashed line.

[0397] In another possible implementation, in the communication apparatus shown in FIG. 16, the processing module 1601 can be one or more logic circuits, and the transceiving module 1602 can be an input / output interface, also referred to as a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiving module 1602 can also be a sending module and a receiving module, the sending module can be an output interface, and the receiving module can be an input interface, and the sending module and the receiving module are integrated in one module, for example, an input / output interface.

[0398] FIG. 18 is another structure of a communication apparatus according to an embodiment of the present application. As shown in FIG. 18, the communication apparatus shown in FIG. 18 includes a logic circuit 1801 and an interface 1802. That is, the processing module 1601 can be implemented by the logic circuit 1801, and the transceiving module 1602 can be implemented by the interface 1802. The logic circuit 1801 can be arranged in a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, etc., and the interface 1802 can be a communication interface, an input / output interface, a pin, etc. For example, FIG. 18 is shown by taking the above communication apparatus as a chip, and the chip includes the logic circuit 1801 and the interface 1802.

[0399] In the embodiments of the present application, the logic circuit and the interface can also be coupled with each other. The specific connection mode of the logic circuit and the interface is not limited in the embodiments of the present application. For example, the logic circuit 1801 can be used to execute the functions or steps implemented by the processing module 1601 shown in FIG. 16, and the interface 1802 can be used to execute the functions or steps implemented by the transceiver module 1602 shown in FIG. 16. The specific description of the logic circuit 1801 and the interface 1802 can refer to the method embodiments shown in FIG. 16 or the above description, which will not be described in detail here.

[0400] The communication apparatus shown in the embodiments of the present application can implement the method provided by the embodiments of the present application in the form of hardware, or implement the method provided by the embodiments of the present application in the form of software, etc., and the embodiments of the present application do not limit this.

[0401] In addition, the embodiments of the present application also provide a communication system, which includes a first station and a second station, and the first station and the second station can be used to execute the method in any of the preceding embodiments.

[0402] The present application also provides a computer program for implementing the operations and / or processes performed by each station in the method provided by the present application.

[0403] The present application also provides a computer readable storage medium, which stores computer code, when the computer code is run on a computer, the computer code causes the computer to execute the operations and / or processes performed by each communication apparatus in the method provided by the present application.

[0404] The present application also provides a computer program product, which includes computer code or computer programs, when the computer code or computer programs are run on a computer, the operations and / or processes performed by each station in the method provided by the present application are executed.

[0405] In several embodiments provided by the present application, it should be understood that the disclosed system, communication apparatus and method can be implemented by other manners. For example, the communication apparatus embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and actual implementation can have another division manner, for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some interfaces, communication apparatus or modules, or can be electrical, mechanical or other form of connection.

[0406] The modules described as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the technical effects of the scheme provided by the embodiments of the present application.

[0407] In addition, each functional module in each embodiment of the present application can be integrated in one processing module, or each module can exist physically alone, or two or more modules can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software functional module.

[0408] The integrated module, if realized in the form of a software functional module and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical scheme of the present application essentially or the part that contributes to the prior art, or all or part of the technical scheme can be embodied in the form of a software product. The computer software product is stored in a readable storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

Claims

1. A method of measurement, characterized by, The method comprises: The first station sends first information, the first information is used for indicating at least one of the number of sending beams or the number of receiving beams; The first station sends second information, the second information is used for indicating the number of repetitions of the sending beams; The first station sends N physical layer convergence procedure protocol data units (PPDUs) to M second stations, the number of the sending beams and the number of repetitions of the sending beams are equal to the number of the receiving beams and the number of repetitions of the receiving beams, the sending beams are beams used for sending the N PPDUs, the receiving beams are beams used for receiving the N PPDUs, N is an integer greater than or equal to 1, and M is an integer greater than or equal to 1.

2. A method of measurement, characterized by, The method comprises: The second station receives first information, the first information is used for indicating at least one of the number of sending beams or the number of receiving beams; The second station receives second information, the second information is used for indicating the number of repetitions of the sending beams; The second station receives N physical layer convergence procedure protocol data units (PPDUs), the number of the receiving beams and the number of repetitions of the receiving beams are equal to the number of the sending beams and the number of repetitions of the sending beams, the sending beams are beams used for sending the N PPDUs, the receiving beams are beams used for receiving the N PPDUs, N is an integer greater than or equal to 1.

3. The method according to claim 1 or 2, characterized in that, The N PPDUs are included in one perception measurement interaction, or the N PPDUs are included in one perception measurement session.

4. The method according to any one of claims 1 to 3, characterized in that, The first information is included in a perception measurement request frame.

5. The method according to any one of claims 1 to 4, characterized in that, The second information is included in a control frame of the PPDUs, or the second information is included in a perception measurement request frame.

6. A method of measuring, characterized by, The method comprises: A first station generates a physical layer convergence procedure protocol data unit (PPDU), the PPDU comprises a synchronization field and one or more unit fields; the synchronization field comprises M synchronization subfields, each synchronization subfield corresponds to a second station; the unit field comprises one or more first fields, the first field comprises one or more second fields, the second field comprises one or more long training fields (LTFs), the first field corresponds to a sending beam, and the number of the second fields in the first field indicates the number of repetitions of the sending beam; The first station sends the PPDU to M second stations.

7. A method of measuring, characterized by, The method comprises: A station receives a physical layer convergence procedure protocol data unit (PPDU), the PPDU comprises a synchronization field and one or more unit fields; the synchronization field comprises M synchronization subfields, each synchronization subfield corresponds to a second station, and the station is one of the M second stations; the unit field comprises one or more first fields, the first field comprises one or more second fields, the second field comprises one or more long training fields (LTFs); the first field corresponds to a sending beam, and the number of the second fields in the first field indicates the number of repetitions of the sending beam. parsing the PPDU.

8. The method according to claim 6 or 7, characterized in that, The unit field further comprises M third fields, each of which corresponds to one of the second stations.

9. The method according to any one of claims 6-8, characterized in that, The unit field comprises at least two first fields, each of which corresponds to a different transmission beam.

10. The method according to any one of claims 6-8, characterized in that, The PPDU comprises at least two unit fields, each of which corresponds to a transmission beam.

11. The method according to any one of claims 6-8, characterized in that, The at least two unit fields in the PPDU correspond to the same transmission beam.

12. The method according to any one of claims 6-11, characterized in that, The physical layer header in the PPDU comprises indication information, or the control frame of the PPDU comprises indication information, the indication information being used to indicate the structure of the PPDU.

13. The method of claim 12, wherein, The indication information is used to indicate the structure of the PPDU, comprising: The indication information is used to indicate at least one of: the order of the second stations corresponding to the M synchronization subfields; the value of M; the number of the unit fields in the PPDU; the number of the first fields in the unit fields; the number of the second fields in the first fields; or the number of LTF symbols in the LTF fields in the second fields.

14. The method of claim 13, wherein, The indication information is further used to indicate at least one of: whether the M third fields are included in the unit fields, or the number of symbols in each of the M third fields, the number of symbols being greater than or equal to 0.

15. The method of claim 12, wherein, The indication information is used to indicate the structure of the PPDU, comprising: The indication information is used to indicate any of: the at least two first fields in the unit fields in the PPDU correspond to different transmission beams; each of the unit fields in the PPDU corresponds to a transmission beam; or the at least two unit fields in the PPDU correspond to the same transmission beam.

16. A communications device, characterized by The computer program product comprises a computer readable storage medium having computer readable program embodied therewith, the computer readable program being used to program a computer to perform the method according to any one of claims 1-15.

17. A computer-readable storage medium, characterized in that, The computer readable storage medium is used to store a computer program, the computer program being executed by a computer to perform the method according to any one of claims 1-15.

18. A computer program product, characterised in that, The computer program product is executed by a computer to perform the method according to any one of claims 1-15.

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