Communication method and apparatus

Abstract

A communication method and apparatus, which can be applied to the field of wireless technology. The present application supports IEEE protocols, such as an IEEE 802.11be / Wi-Fi 7 / EHT protocol, an IEEE 802.11bn / UHR / Wi-Fi 8 protocol, an integrated millimeter wave / IMMW protocol, an IEEE 802.15 / UWB protocol, or an IEEE 802.11bf / sensing protocol, or a SparkLink protocol. Transmitting and receiving parties can exchange N PPDUs, and the N PPDUs can meet the following constraint condition: the result of an operation between the number of transmitting beams and the number of repetitions of the transmitting beams being equal to the result of an operation between the number of receiving beams and the number of repetitions of the receiving beams, wherein the transmitting beams are beams used for transmitting the N PPDUs, and the receiving beams are beams used for receiving the N PPDUs. Therefore, the flexibility of PPDU configuration is effectively improved.

Description

Communication method and apparatus

[0001] The present application claims priority to the Chinese patent application No. 202411126991.8, filed on August 15, 2024, with the State Intellectual Property Office of China, and entitled "Communication method and apparatus", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of wireless technology, and in particular to a communication 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 not carrying any device) sensing. The 802.11bf standard includes two large categories of standards, low frequency (such as below 7 gigahertz (sub7GHz), mainly relying 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, mainly relying 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, it can be measured within a certain angle range (even omnidirectionally). At this time, the measurement device needs to transmit the PPDU in multiple directions.

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

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

[0007] In a first aspect, embodiments of the present application provide a communication method, which is applied to a first station, the first station including a wireless local area network (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:

[0008] The first station generates N PPDUs, N is an integer greater than or equal to 1; the first station transmits the N PPDUs, the number of transmission beams multiplied by the number of repetitions of the transmission beams is equal to the number of reception beams multiplied by the number of repetitions of the reception beams, the transmission beam is a beam used for transmitting the N PPDUs, and the reception beam is a beam used for receiving the N PPDUs.

[0009] For example, the N PPDUs can be used for at least one of channel measurement, beam training, or sensing measurement. As an example, the N PPDUs are used for sensing measurement or channel measurement, and N is greater than or equal to 1. As another example, the N PPDUs are used for beam training, and N is greater than or equal to 2.

[0010] The first station can also be referred to as a transmission end, that is, an apparatus that transmits the N PPDUs; and the second station can also be referred to as a reception end, that is, an apparatus that receives the N PPDUs. For example, when the N PPDUs are applied to the field of sensing, the first station can also be referred to as a sensing transmission end, and the second station can also be referred to as a sensing reception end.

[0011] In the embodiments of the present application, the two parties of the transmission and reception can perform measurement as long as the above conditions are met, so that the two parties of the transmission and reception can flexibly adjust the transmission beam or the reception beam of a single PPDU, thereby improving the flexibility of PPDU configuration. The measurement shown in the embodiments of the present application includes but is not limited to channel measurement, sensing measurement, or beam training.

[0012] In a possible implementation, the number of transmission beams multiplied by the number of repetitions of the transmission beams is equal to the number of reception beams multiplied by the number of repetitions of the reception beams.

[0013] In a possible implementation, N PPDUs are included in one sensing measurement interaction, or N PPDUs are included in one sensing measurement session, or N PPDUs are included in one group transmission.

[0014] One sensing measurement session can include 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 is not listed one by one here.

[0015] In an embodiment of the present application, the N PPDU is a PPDU within a sensing measurement interaction, or a PPDU within a sensing measurement session, or a PPDU within a groupcast. In other words, the N PPDU is a PPDU within a sensing measurement interaction, or a PPDU within a sensing measurement session, or a PPDU within a groupcast. The N PPDU within a sensing measurement interaction, or a PPDU within a sensing measurement session, or a PPDU within a groupcast can enable the transceiver to flexibly adjust the transmission beam or the reception beam of a single PPDU within a sensing measurement interaction, or a single PPDU within a sensing measurement session, or a single PPDU within a groupcast, thereby further improving the flexibility of PPDU configuration.

[0016] In a possible implementation, the method further includes: the first station sending at least one of a transmission beam list or a reception beam list; or, the first station receiving at least one of a transmission beam list or a reception beam list; wherein the transmission beam list is used to determine the number of transmission beams, and the reception beam list is used to determine the number of reception beams.

[0017] As an example, the first station is a sensing initiator, and the second station is a sensing responder. The sensing initiator can be a sensing transmitter or a sensing receiver. As another example, the first station is a sensing responder, and the second station is a sensing initiator. The sensing responder can be a sensing receiver or a sensing transmitter.

[0018] The transmission beam list is used to determine the number of transmission beams within a sensing measurement session, and the reception beam list is used to determine the number of reception beams within a sensing measurement session. Alternatively, the transmission beam list is used to determine the number of transmission beams used in beam training, and the reception beam list is used to determine the number of reception beams used in beam training. Alternatively, the transmission beam list is used to determine the number of transmission beams used in channel measurement, and the reception beam list is used to determine the number of reception beams used in channel measurement.

[0019] For example, the transmission beam list includes the number of transmission beams within a sensing measurement session and the respective indexes of the transmission beams. The reception beam list includes the number of reception beams within a sensing measurement session and the respective indexes of the reception beams.

[0020] In the embodiments of the present application, the number of transmission beams is configured by the transmission beam list, and the number of reception beams is configured by the reception beam list, so that the first station can determine the transmission beams in a sensing measurement session or determine the reception beams in a sensing measurement session. Therefore, the transmission and reception parties can reasonably adjust the transmission beams or reception beams of each PPDU in the sensing measurement session, improve the flexibility of PPDU configuration, and improve the efficiency of communication between the transmission and reception parties.

[0021] In a possible implementation, the method further includes: the first station sending at least one of the first number information or the second number information, the first number information being used to indicate the number of transmission beams in a sensing measurement interaction, and the second number information being used to indicate the number of reception beams in a sensing measurement interaction; or the first station receiving at least one of the first number information or the second number information, the first number information being used to indicate the number of transmission beams in a sensing measurement interaction, and the second number information being used to indicate the number of reception beams in a sensing measurement interaction.

[0022] As an example, the first number information and the second number information are implemented by one field, such as a field called a number of beams per interaction field or a number of transmit / receive (Tx / Rx) beams per interaction field, and the name of the field is not limited in the embodiments of the present application. The number of beams per interaction field is used to indicate the number of transmission beams in a sensing measurement interaction. The number of transmission beams in a sensing measurement interaction is equal to the number of reception beams in the aforementioned sensing measurement interaction.

[0023] As another example, the first number information and the second number information are respectively implemented by one field, such as a number of transmission beams per interaction field for the first number information and a number of reception beams per interaction field for the second number information. The number of transmission beams per interaction field is used to indicate the number of transmission beams in a sensing measurement interaction, and the number of reception beams per interaction field is used to indicate the number of reception beams in the aforementioned sensing measurement interaction.

[0024] In the embodiments of the present application, the first number information or the second number information can be used by the sensing initiator to configure the number of transmission beams or the number of reception beams in a sensing measurement interaction, so that the sensing responder can know the number of transmission beams or the number of reception beams in a sensing measurement interaction. Therefore, the transmission and reception parties can reasonably adjust the transmission beams or reception beams of each PPDU in the sensing measurement interaction, improve the flexibility of PPDU configuration, and improve the efficiency of communication.

[0025] In a possible implementation, the method further includes: the first station sending 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 sending beam within one sensing measurement interaction, and the second index information being used to indicate a starting index of a receiving beam within one sensing measurement interaction; or the first station receiving 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 sending beam within one sensing measurement interaction, and the second index information being used to indicate a starting index of a receiving beam within one sensing measurement interaction.

[0026] As an example, the first index information and the second index information are implemented by one field, for example, 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 sending beam within one sensing measurement interaction. The starting index of the sending beam within the sensing measurement interaction is the same as the starting index of a receiving beam within the sensing measurement interaction.

[0027] As another example, the first index information and the second index information are respectively implemented by one field, for example, the first index information is carried in a sending beam starting index field, and the second index information is carried in a receiving beam starting index field. The sending beam starting field is used to indicate a starting index of a sending beam within one sensing measurement interaction, and the receiving beam starting index field is used to indicate a starting index of a receiving beam within the aforementioned one sensing measurement interaction.

[0028] In the embodiments of the present application, by indicating the starting index of the sending beam and the starting index of the receiving beam, the transceiving parties can effectively determine the sending beam and the receiving beam. Therefore, the transceiving parties can reasonably adjust the sending beam and the receiving beam of each PPDU within the sensing measurement interaction, improve the flexibility of PPDU configuration, and improve the communication efficiency.

[0029] In a second aspect, the embodiments of the present application provide a communication method, which is applied to a second station. The second station 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 that can be arranged in the WLAN device. The method includes the following steps.

[0030] The second station receives N PPDU, the number of receiving beams and the number of repetitions of the receiving beams are equal to the number of sending beams and the number of repetitions of the sending beams, the receiving beam is a beam used to receive the N PPDU, the sending beam is a beam used to send the N PPDU, and the PPDU is used for at least one of sensing or beam training; and the second station parses the N PPDU.

[0031] The description of the second aspect can refer to the first aspect, which will not be described in detail here.

[0032] In a possible implementation, 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.

[0033] In a possible implementation, N PPDU are included in one sensing measurement interaction, or N PPDU are included in one sensing measurement session, or N PPDU are included in one group transmission.

[0034] In a possible implementation, the method further includes: the second station receiving at least one of the transmission beam list or the reception beam list; or the second station sending at least one of the transmission beam list or the reception beam list; wherein the transmission beam list is used to determine the number of the transmission beams, and the reception beam list is used to determine the number of the reception beams.

[0035] In a possible implementation, the method further includes: the second station receiving at least one of the first number information or the second number information, the first number information being used to indicate the number of the transmission beams in one sensing measurement interaction, and the second number information being used to indicate the number of the reception beams in one sensing measurement interaction; or the second station sending at least one of the first number information or the second number information, the first number information being used to indicate the number of the transmission beams in one sensing measurement interaction, and the second number information being used to indicate the number of the reception beams in one sensing measurement interaction.

[0036] In a possible implementation, the method further includes: the second station receiving at least one of the first index information or the second index information, the first index information being used to indicate the starting index of the transmission beams in one sensing measurement interaction, and the second index information being used to indicate the starting index of the reception beams in one sensing measurement interaction; or the second station sending at least one of the first index information or the second index information, the first index information being used to indicate the starting index of the transmission beams in one sensing measurement interaction, and the second index information being used to indicate the starting index of the reception beams in one sensing measurement interaction.

[0037] In a third aspect, an embodiment of the present application provides a communication method, which can be applied to a first station (also referred to as a sensing transmission end), the first station including a WLAN device (including a sensing device or a Wi-Fi device or a device involved in the Star Alliance, etc.), or a chip, a functional module, a processing system or a communication component, etc. that can be arranged in the WLAN device. The method includes:

[0038] transmitting a PPDU, the PPDU comprising one or more unit fields, the unit fields comprising one or more first fields, the first fields comprising one or more second fields, the second fields comprising one or more long training fields (LTFs); wherein one first field corresponds to one transmit beam, and the number of second fields in one first field indicates the number of repetitions of the transmit beam.

[0039] Exemplarily, the PPDU is used for beam training or channel measurement or sensing measurement.

[0040] In the embodiments of the present application, the measurements in different directions are realized through the first fields in the PPDU. When the first station performs measurements in different directions, there is no need to interval a time duration between different PPDUs, and the interval between PPDUs in different directions is omitted, thereby improving the measurement efficiency. The measurements shown in the embodiments of the present application include but are not limited to channel measurement or sensing measurement or beam training.

[0041] In a fourth aspect, the embodiments of the present application provide a communication method, which can be applied to a second station (i.e., a sensing receiving end), 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, etc. which can be arranged in the WLAN device. The method comprises:

[0042] receiving a PPDU, the PPDU comprising one or more unit fields, the unit fields comprising one or more first fields, the first fields comprising one or more second fields, the second fields comprising one or more LTFs; wherein one first field corresponds to one transmit beam, and the number of second fields in one first field indicates the number of repetitions of the transmit beam.

[0043] The description of the fourth aspect can be referred to the third aspect, and will not be described in detail here.

[0044] In combination with the third aspect or the fourth aspect, in a possible implementation manner, each first field further comprises a third field in front of the first field; or, a first time duration is interval between two adjacent first fields in each unit field.

[0045] Exemplarily, the third field or the first time duration is used for at least one of the following: beam switching, automatic gain control (AGC) adjustment, synchronization or phase tracking.

[0046] In the embodiments of the present application, by comprising the third field in front of each first field, or intervaling the first time duration between two adjacent first fields, the first station (or the second station) can have sufficient time for beam switching.

[0047] In a possible implementation of the third aspect or the fourth aspect, the unit field includes at least two first fields, and the at least two first fields correspond to different transmission beams respectively.

[0048] That is, each first field included in the unit field can correspond to one transmission beam, and the different first fields correspond to different transmission beams. In this way, the efficiency of beam training or channel measurement or sensing through the PPDU can be further improved.

[0049] In a possible implementation of the third aspect or the fourth aspect, the at least two unit fields in the PPDU correspond to the same transmission beam.

[0050] In a possible implementation of the third aspect or the fourth aspect, all the fields in the PPDU correspond to the same transmission beam.

[0051] In a possible implementation of the third aspect or the fourth aspect, the unit field further includes a fourth field before the first first field.

[0052] For example, the fourth field is used for at least one of the following: beam switching, AGC adjustment, synchronization, or phase tracking.

[0053] In a possible implementation of the third aspect or the fourth aspect, the physical layer header of 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.

[0054] For example, the physical layer header of the PPDU includes a signal (SIG) field or a header field in the PPDU.

[0055] By indicating the structure of the PPDU through the indication information, the sensing receiver can determine the structure of the PPDU, and the parsing efficiency is improved.

[0056] In a possible implementation of the third aspect or the fourth aspect, the indication information used to indicate the structure of the PPDU includes: the indication information is used to indicate at least one of the following: 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.

[0057] In a possible implementation manner of the third aspect or the fourth aspect, the indication information is further used to indicate at least one of the following: whether the third field is included in the unit field, or a number of symbols in the third field, the number of symbols being greater than or equal to 0; a first time length of an interval between two first fields; whether the fourth field is included in the unit field, or a number of symbols in the fourth field, the number of symbols being greater than or equal to 0.

[0058] In a possible implementation manner of the third aspect or the fourth aspect, the indication information is used to indicate a structure of the PPDU, including: the indication information is used to indicate any one of the following: the at least two first fields in the unit field in the PPDU correspond to different transmission beams; the at least two unit fields in the PPDU correspond to the same transmission beam; or all fields in the PPDU correspond to the same transmission beam.

[0059] In a possible implementation manner of the third aspect or the fourth aspect, the indication information is used to indicate a structure of the PPDU, including: the indication information is used to indicate any one of the following: the at least two first fields in the unit field in the PPDU correspond to different transmission beams; the at least two unit fields in the PPDU correspond to the same transmission beam; or all fields in the PPDU correspond to the same transmission beam.

[0060] In a possible implementation manner of the third aspect or the fourth aspect, the indication information is used to indicate a structure of the PPDU, including: the indication information is used to indicate any one of the following: the at least two first fields in the unit field in the PPDU correspond to different transmission beams; the at least two unit fields in the PPDU correspond to the same transmission beam; or all fields in the PPDU correspond to the same transmission beam.

[0061] In a possible implementation manner of the third aspect or the fourth aspect, the indication information is used to indicate a structure of the PPDU, including: the indication information is used to indicate any one of the following: the at least two first fields in the unit field in the PPDU correspond to different transmission beams; the at least two unit fields in the PPDU correspond to the same transmission beam; or all fields in the PPDU correspond to the same transmission beam.

[0062] In a possible implementation manner of the third aspect or the fourth aspect, the indication information is used to indicate a structure of the PPDU, including: the indication information is used to indicate any one of the following: the at least two first fields in the unit field in the PPDU correspond to different transmission beams; the at least two unit fields in the PPDU correspond to the same transmission beam; or all fields in the PPDU correspond to the same transmission beam.

[0063] In a possible implementation manner of the third aspect or the fourth aspect, the indication information is used to indicate a structure of the PPDU, including: the indication information is used to indicate any one of the following: the at least two first fields in the unit field in the PPDU correspond to different transmission beams; the at least two unit fields in the PPDU correspond to the same transmission beam; or all fields in the PPDU correspond to the same transmission beam.

[0064] In a tenth aspect, an embodiment of the present application provides a communication system, comprising a first station configured to perform the method of the first aspect or any possible implementation of the first aspect, and a second station configured to perform the method of the second aspect or any possible implementation of the second aspect.

[0065] In an eleventh aspect, an embodiment of the present application provides a communication system, comprising a first station configured to perform the method of the third aspect or any possible implementation of the third aspect, and a second station configured to perform the method of the fourth aspect or any possible implementation of the fourth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0066] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0067] FIG. 2 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

[0068] FIG. 3a is a schematic diagram of a format of a sensing scheduling subelement in a sensing measurement request frame according to an embodiment of the present application;

[0069] FIG. 3b is a schematic diagram of a format of a sensing scheduling subelement in a sensing measurement request frame according to an embodiment of the present application;

[0070] FIG. 4 is a schematic diagram of a format of time division duplex (TDD) beamforming information in a directional multi-gigabit (DMG) sensing request frame according to an embodiment of the present application;

[0071] FIG. 5 is a schematic diagram of a scenario of a communication method according to the prior art;

[0072] FIG. 6 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

[0073] FIG. 7 is a schematic diagram of a format of a unit field according to an embodiment of the present application;

[0074] FIG. 8a is a schematic diagram between a first field in a unit field and a transmit beam according to an embodiment of the present application;

[0075] FIG. 8b is a schematic diagram between a first field in a unit field and a transmit beam according to an embodiment of the present application;

[0076] FIG. 8c is a schematic diagram of a first field in a unit field and a transmission beam according to an embodiment of the present application;

[0077] FIG. 8d is a schematic diagram of a unit field and a transmission beam according to an embodiment of the present application;

[0078] FIG. 8e is a schematic diagram of a unit field and a transmission beam according to an embodiment of the present application;

[0079] FIG. 9a and FIG. 9b are schematic diagrams of a format of a unit field according to an embodiment of the present application;

[0080] FIG. 10a is a schematic diagram of a format of a unit field according to an embodiment of the present application;

[0081] FIG. 10b is a schematic diagram of a format of a unit field according to an embodiment of the present application;

[0082] FIG. 11a is a schematic diagram of a format of a unit field according to an embodiment of the present application;

[0083] FIG. 11b is a schematic diagram of a format of a unit field according to an embodiment of the present application;

[0084] FIG. 12 is a schematic diagram of a format of a PPDU according to an embodiment of the present application;

[0085] FIG. 13a and FIG. 13b are schematic diagrams of a format of a PPDU according to an embodiment of the present application;

[0086] FIG. 13c is a schematic diagram of a format of a PPDU according to an embodiment of the present application;

[0087] FIG. 14 is a schematic diagram of a format of a PPDU according to an embodiment of the present application;

[0088] FIG. 15 is a flowchart of a method of indicating a PPDU according to an embodiment of the present application;

[0089] FIG. 16 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0090] FIG. 17 is a schematic diagram of another structure of a communication apparatus according to an embodiment of the present application;

[0091] FIG. 18 is a schematic diagram of yet another structure of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0092] To make the technical solution of the present application more comprehensible, the present application will be further described below with reference to the accompanying drawings.

[0093] The terms "first" and "second" and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a specific sequential or chronological order. Descriptions using the terms "including", "containing", "comprising", "having" and the like are meant not to be limiting. For example, a process, method, object, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements, but can include additional steps or elements not expressly listed or inherent to such process, method, object, or apparatus.

[0094] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments.

[0095] In the present application, "at least one" means one or more, "multiple" means two or more, "at least two" means two or three or more, and "and / or" is used to describe the relationship between associated objects, indicating 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 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".

[0096] In the present application, "indication" can include direct indication, indirect indication, display indication, and implicit indication. When describing certain indication information for indicating A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0097] In the present application, the information indicated by the indication information is referred to as to-be-indicated information. In the 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 association relationship. The to-be-indicated information can also be only indicated in part, 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 arrangement order of each information agreed in advance (for example, the protocol stipulates), 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 opportunity of these sub-information can be the same or different.

[0098] In the present application, transmission can include sending or receiving.

[0099] In the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as that the destination of the information is XX, which can include direct sending through the air interface, or indirect sending through the air interface by other units or modules. "Receiving information from YY" can be understood as that the source of the information is YY, which can include direct receiving from YY through the air interface, or indirect receiving from YY through the air interface by other units or modules. "Sending" can also be understood as "output" of the chip interface, and "receiving" can also be understood as "input" of the chip interface. In other words, sending and receiving can be carried out between devices, for example, between network devices and terminal devices, or can be carried out within a device, for example, between components, between modules, between chips, between software modules or hardware modules in the device through a bus, a wire or an interface.

[0100] The embodiment of the present application provides a communication method and device, and improves the flexibility of PPDU configuration.

[0101] The embodiment of the present application also provides a communication method and device, and improves the efficiency of measurement using PPDU. The measurement shown in the embodiment of the present application includes but is not limited to channel measurement, sensing measurement or beam training. Details are not described hereinafter.

[0102] The embodiment of the present application also provides an indication method and device of PPDU, which indicates the structure of PPDU through indication information, and improves the communication efficiency.

[0103] The following introduces a communication system related to the present application.

[0104] 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.

[0105] 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.

[0106] 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 of 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.

[0107] 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).

[0108] 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 called 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.

[0109] 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).

[0110] 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 / 802.11bf protocols, and of course also applies to 802.11bn and later protocols.

[0111] 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.

[0112] 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.

[0113] The method according to the present application is described below.

[0114] In order to facilitate understanding of the technical solutions of the embodiments of the present application, some terms or concepts that can be involved in the embodiments of the present application are described simply.

[0115] Sensing technology: The signal emitted by a Wi-Fi device is usually reflected, diffracted and scattered by various obstacles before being received by the device. This phenomenon makes the actual received signal often be a superposition of multiple signals, i.e., the channel environment can become complex, but it also brings convenience for sensing the physical environment through wireless signals. By analyzing the wireless signals affected by various obstacles, such as channel state information (CSI), etc., the surrounding environment can be inferred, thus deriving the sensing technology.

[0116] IEEE 802.11bf is a new generation of wireless standard on WLAN sensing. WLAN sensing is a device with WLAN sensing capability using received wireless signals in a given environment to determine the characteristics of a predetermined target (such as an object, an animal, a person), including the distance, direction, speed, motion, behavior, etc. of the target.

[0117] Currently, in WLAN sensing technology, there are mainly the following roles:

[0118] (1) Sensing initiator: a device that initiates a sensing behavior. For example, the sensing initiator can initiate a sensing measurement request frame, which can be transmitted at a low frequency or at a high frequency.

[0119] (2) Sensing responder: a device that responds to the sensing behavior initiated by the sensing initiator and participates in the sensing behavior.

[0120] (3) Sensing transmitter (TX): a device that transmits a PPDU for sensing measurement during the sensing process. The PPDU for sensing measurement can be transmitted at a high frequency.

[0121] (4) Sensing receiver (RX): a device that receives the PPDU transmitted by the sensing transmitter and performs sensing measurement during the sensing process.

[0122] Sensing measurement is presented in the form of a session, and the process of sensing measurement includes sensing capability interaction, sensing measurement session establishment, sensing measurement interaction, and sensing measurement closure (or sensing measurement termination). Among them, there are two forms of sensing measurement interaction: trigger-based (TB) sensing measurement exchange and non-trigger-based (non-TB) sensing measurement exchange. The trigger-based sensing measurement exchange is initiated by the AP as the sensing initiator, and the non-trigger-based sensing measurement exchange is initiated by the non-AP STA as the sensing initiator.

[0123] FIG. 2 is a flow diagram of a communication method according to an embodiment of the present application. The first station and the second station involved in the communication method can refer to the above, and will not be described in detail here. For example, the first station can be a sensing transmitter, and the second station can be a sensing receiver. The sensing transmitter can be a sensing initiator, or a sensing responder. Correspondingly, the sensing receiver can be a sensing responder, or a sensing initiator. 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 by the embodiments of the present application. As shown in FIG. 2, the method includes the following steps.

[0124] In a possible implementation, the method shown in FIG. 2 includes step 201.

[0125] 201. The first station generates N PPDU, N is an integer greater than or equal to 1.

[0126] The N PPDU can be generated by the first station at different times. The 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.

[0127] As an example, the N PPDU is a PPDU within a sensing measurement interaction. In other words, the N PPDU is a PPDU within a sensing measurement interaction. Within the sensing measurement interaction, the first station can send N PPDU.

[0128] As another example, the N PPDU is a PPDU within a sensing measurement session. In other words, the N PPDU is a PPDU within a sensing measurement session. Within the sensing measurement session, the first station can send N PPDU.

[0129] 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 the group transmission, the first station can send N PPDU.

[0130] 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 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.

[0131] 202、the first station transmits N PPDU, and the second station receives the N PPDU. The operation result of the number of the transmission beams and the number of repetitions of the transmission beams is equal to the operation result of the number of the 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.

[0132] For example, the operation result of the number of the transmission beams and the number of repetitions of the transmission beams is equal to the operation result of the number of the reception beams and the number of repetitions of the reception beams, including: the number of the transmission beams * the number of repetitions of the transmission beams = the number of the reception beams * the number of repetitions of the reception beams.

[0133] When the number of the transmission beams is 1, the number of repetitions of the single transmission beam = the number of the reception beams * the number of repetitions of the reception beams. For example, the number of the transmission beams = 1, and the number of repetitions of the transmission beam is equal to 10. Then, the number of the reception beams can be equal to 2, and the number of repetitions of the reception beam is equal to 5; or the number of the reception beams can be 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 the same as an example. In a specific implementation, the number of repetitions of different reception beams can also be different. For example, the number of the reception beams can be equal to 3, and the number of repetitions of the three reception beams is 3, 3, and 4, respectively.

[0134] When the number of the transmission beams is greater than or equal to 2, the number of the transmission beams * the number of repetitions of the transmission beams = the number of the reception beams * the number of repetitions of the reception beams. For example, the number of the transmission beams = 3, and the number of repetitions of the transmission beam is equal to 10. Then, the number of the reception beams can be equal to 5, and the number of repetitions of the reception beam is equal to 6; or the number of the reception beams is equal to 6, and the number of repetitions of the reception beam is equal to 5, and so on. Here, the examples are not listed one by one.

[0135] As an example, when N = 1, for the 1 PPDU, the operation result of the number of the transmission beams and the number of repetitions of the transmission beams of the 1 PPDU = the operation result of the number of the reception beams and the number of repetitions of the reception beams of the 1 PPDU.

[0136] As another example, when N is greater than or equal to 2, for the N PPDUs, the operation result of the number of the transmit beams of the N PPDUs and the repetition number of the transmit beams = the operation result of the number of the receive beams of the N PPDUs and the repetition number of the receive beams. For example, when N = 2, the two PPDUs are PPDU a and PPDU b. The number of the transmit beams of PPDU a is equal to 1, and the repetition number of the transmit beams is equal to 10. The number of the transmit beams of PPDU b is equal to 2, and the repetition number of the transmit beams is equal to 10. For example, the number of the receive beams of PPDU a can be equal to 2, and the repetition number of the receive beams is equal to 5. The number of the receive beams of PPDU b can be equal to 4, and the repetition number of the receive beams is equal to 5. For another example, the number of the receive beams of PPDU a can be equal to 2, and the repetition number of the receive beams is equal to 6. The number of the receive beams of PPDU b can be equal to 3, and the repetition number of the receive beams is equal to 6. In this way, the number of the transmit beams, the repetition number of the transmit beams, and the number of the receive beams of a single PPDU in the N PPDUs can be flexibly adjusted.

[0137] In a possible implementation, the first station can transmit the N PPDUs on a high frequency. In 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 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 embodiments of the present application can be transmitted on the low frequency or the high frequency, which is not limited in embodiments of the present application.

[0138] In a possible implementation, before step 201, or before step 202, the method shown in FIG. 2 further includes:

[0139] The sensing initiator transmits at least one of a receive beam list or a transmit beam list, and correspondingly, the sensing responder receives at least one of the receive beam list or the transmit 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. 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 a receive beam list or a transmit beam list, and the second station receives at least one of the receive beam list or the transmit beam list. Alternatively, the second station can transmit at least one of a receive beam list or a transmit beam list, and the first station receives at least one of the receive beam list or the transmit beam list.

[0140] 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 a 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.

[0141] Exemplarily, the transmit beam list includes the number of transmit beams in a sensing measurement session and the respective indices of the transmit beams. The receive beam list includes the number of receive beams in a sensing measurement session and the respective indices of the receive beams.

[0142] As an example, the number of receive beams in each sensing measurement interaction can be the number of receive beams indicated by 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 condition can be transformed as: the number of transmit beams * the repetition number of transmit beams = the number of receive beams indicated by the receive beam list * the repetition number of receive beams.

[0143] As another example, the number of transmit beams in each sensing measurement interaction can be the number of transmit beams indicated by the transmit beam list. That is, in each sensing measurement interaction, the sensing transmitter can traverse all the transmit beams in the transmit beam list. In this case, the condition can be transformed as: the number of transmit beams indicated by the transmit beam list * the repetition number of transmit beams = the number of receive beams * the repetition number of receive beams.

[0144] As a further example, the number of transmit beams within each sensing measurement interaction can be the number of transmit beams indicated by the transmit beam list, and the number of receive beams within each sensing measurement interaction can be the number of receive beams indicated by the receive beam list. That is, within each sensing measurement interaction, the sensing transmitter iterates through all transmit beams in the transmit beam list, and the sensing receiver iterates through all receive beams in the receive beam list.

[0145] Exemplarily, the transmit beam list or the receive beam list can be included in a management frame, such as a sensing measurement request frame or a newly defined frame. For example, the transmit beam list can be included in a transmit beam list subelement in a DMG sensing measurement request frame, and the receive beam list can be included in a receive beam list subelement in a 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.

[0146] In embodiments of the present application, the sensing initiator can configure the number of transmit beams or the number of receive beams in a sensing measurement session through a sensing measurement request frame, and the sensing responder can know the number of transmit beams or the number of receive beams in a sensing measurement session. Thus, the two stations can reasonably adjust the transmit beams or the receive beams of each PPDU in the sensing measurement session, and improve the flexibility of PPDU configuration.

[0147] In a possible implementation, before step 201, or before step 202, the method shown in FIG. 2 further includes:

[0148] The first station transmits at least one of the first number information or the second number information, and correspondingly, the second station receives at least one of the first number information or the second number information. Alternatively, the second station transmits at least one of the first number information or the second number information, and correspondingly, the first station receives at least one of the first number information or the second number information.

[0149] As an example, the first quantity information or the second quantity information can be carried in a management frame, such as in a sense measurement request frame or a newly defined frame. The sense measurement request frame includes at least one of the first quantity information or the second quantity information, the first quantity information is used to indicate a number of transmit beams within one sense measurement interaction, and the second quantity information is used to indicate a number of receive beams within one sense measurement interaction. Optionally, the number of transmit beams within each sense measurement interaction in a sense measurement session can be determined by the first quantity information, such as the number of transmit beams within each sense measurement interaction is equal to the number of transmit beams indicated by the first quantity information. That is, the number of transmit beams within each sense measurement interaction in the sense measurement session can be the same. Optionally, the number of receive beams within each sense measurement interaction in a sense measurement session can be determined by the second quantity information, such as the number of receive beams within each sense measurement interaction is equal to the number of receive beams indicated by the second quantity information. That is, the number of receive beams within each sense measurement interaction in the sense measurement session can be the same.

[0150] The above management frame can be transmitted in low frequency or in high frequency, and the embodiments of the present application are not limited in this aspect.

[0151] As another example, the first quantity information or the second quantity information can be carried in a control frame. The control frame can also be referred to as a configuration frame of a sense measurement interaction, or a configuration frame of a PPDU.

[0152] For example, the control frame can be transmitted in high frequency. The control frame can include, but is not limited to, a DMG sense request frame or a newly defined frame. The number of transmit beams within each sense measurement interaction in a sense measurement session is determined by the DMG sense request frame corresponding to the sense measurement interaction. The number of transmit beams within each sense measurement interaction can be the same or different. The number of receive beams within each sense measurement interaction in a sense measurement session is determined by the DMG sense request frame corresponding to the sense measurement interaction. The number of receive beams within each sense measurement interaction can be the same or different. The DMG sense request frame shown herein is a control frame corresponding to a sense measurement interaction, and in specific implementations, the frame used to configure the number of transmit beams or the number of receive beams within a sense measurement interaction can also be other management frames or control frames, which are not listed one by one herein.

[0153] For 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 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.

[0154] The following is an example of the first quantity information and the second quantity information included in a sensing measurement request frame, which is not limiting to the embodiments of the present application.

[0155] As an example 1, the first quantity information and the second quantity information are implemented by one field, which is referred to as a per-interaction beam quantity field or a per-interaction transmit / receive (Tx / Rx) beam quantity field, and the name of the field is not limited to the embodiments of the present application.

[0156] 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: 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. The number beams per exchange field is used to indicate a number of transmit beams in one sensing measurement exchange. The number of transmit beams in one sensing measurement exchange is equal to a number of receive beams in the aforementioned sensing measurement exchange.

[0157] For other descriptions of FIG. 3a, refer to the 802.11 standard, which will not be described in detail here. The length, order, or name of each field shown in FIG. 3a is only an example and does not limit the embodiments of the present application.

[0158] 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. The format of the IMMW sensing measurement request frame is not limited by the embodiments of the present application.

[0159] As another example 2, the first number information and the second number information are implemented by one field respectively, such as the first number information is carried in a number Tx beams per exchange field and the second number information is carried in a number Rx beams per exchange field.

[0160] 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. As shown in FIG. 3b, the sensing scheduling subelement includes a number Tx beams per exchange and a number Rx beams per exchange. The number Tx beams per exchange field is used to indicate a number of transmit beams in one sensing measurement exchange, and the number Rx beams per exchange field is used to indicate a number of receive beams in the aforementioned one sensing measurement exchange. For other descriptions of FIG. 3b, refer to FIG. 3a, which will not be described in detail here.

[0161] In the embodiments of the present application, the number of repetitions of the receiving beams within the sensing measurement interaction = the number of transmitting beams within the sensing measurement interaction * the number of repetitions of the transmitting beams / the number of receiving beams within the sensing measurement interaction. The sensing receiving end can continuously receive multiple times on a single receiving beam, and then switch to the next receiving beam to continuously receive multiple times. Alternatively, the sensing receiving end can also traverse all receiving beams multiple times. For example, the number of receiving beams = 3, the number of repetitions = 2, and the receiving beams are receiving beam 1-receiving beam 3. Then the sensing receiving end can continuously receive twice through receiving beam 1, switch to receiving beam 2 to continuously receive twice, and switch to receiving beam 3 to continuously receive twice. Alternatively, the sensing receiving end can receive once through receiving beam 1, receive once through receiving beam 2, receive once through receiving beam 3, and then receive once through receiving beam 1, receive once through receiving beam 2, and receive once through receiving beam 3.

[0162] In the embodiments of the present application, the first number information or the second number information can be used by the sensing initiating end to configure the number of transmitting beams or the number of receiving beams within the sensing measurement interaction, and the sensing responding end can know the number of transmitting beams or the number of receiving beams within the sensing measurement interaction. Thus, the transmitting and receiving parties can reasonably adjust the transmitting beams or the receiving beams of each PPDU within the sensing measurement interaction, improve the flexibility of PPDU configuration, and improve the communication efficiency.

[0163] The first number information or the second number information indicates the number of transmitting beams or the number of receiving beams within the sensing measurement interaction. The number of transmitting beams can not be all the transmitting beams in the transmitting beam list, and the number of receiving beams can not be all the receiving beams in the receiving beam list. Therefore, the index of the transmitting beam and the index of the receiving beam can also be indicated by the management frame or the control frame. For example, the sensing transmitting end can not traverse all the transmitting beams in the transmitting beam list within a sensing measurement interaction, and the sensing receiving end can not traverse all the receiving beams in the receiving beam list within a sensing measurement interaction. Therefore, for a sensing measurement interaction, the index of the transmitting beam and the index of the receiving beam can be indicated by the management frame or the control frame.

[0164] 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 transmitting beam within a sensing measurement interaction, and the second index information being used to indicate a starting index of a receiving beam within a sensing measurement interaction. The second station receives at least one of the first index information or the second index information.

[0165] 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.

[0166] The first station or the second station can determine the indices of the transmit beams within one sensing measurement interaction according to the first index information and the first number information, and determine the indices of the receive beams within one sensing measurement interaction according to the second index information and the second number information.

[0167] 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 above, and will not be repeated here.

[0168] 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.

[0169] 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.

[0170] The description of the control frame can refer to the above, and will not be repeated here.

[0171] As another 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.

[0172] The embodiments of the present application do not limit the frame carrying the first index information or the second index information.

[0173] For different sensing measurement interactions, the starting index of the transmit beam can be the same or different, and the starting index of the receive beam can be the same or different.

[0174] As an example, the first index information and the second index information are implemented by one field, such as a starting beam index field or a Tx / Rx starting beam index field. The name of the field is not limited by the embodiments of the present application. The starting beam index field is used to indicate the starting index of the transmit beam within one sensing measurement interaction. The starting index of the transmit beam within the sensing measurement interaction is the same as the starting index of the receive beam within the sensing measurement interaction.

[0175] Figure 4 is a format diagram of a TDD beamforming information field in a DMG sense request frame according to an embodiment of the present application. As shown in Figure 4, the TDD beamforming information field includes at least one of the following: 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 num of STAs in exchange, a num of PPDUs in exchange, an enhanced directional multi-gigabit (EDMG) training (TRN) length, a 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 golays, a sensing golay index, a monostatic sounding mode, a num of Tx beams in exchange, a num of repeat in exchange, a num of absent exchange, or an updated Tx beam list.

[0176] As shown in Figure 4, the first beam index can be used to indicate a starting index of a transmit beam within a sensing measurement exchange. The starting index of the transmit beam within the sensing measurement exchange is the same as a starting index of a receive beam within the sensing measurement exchange. Alternatively, the first beam index can be used to indicate the starting index of the transmit beam and the starting index of the receive beam within the sensing measurement exchange.

[0177] 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 transmission beam start index field and the second index information is carried in a reception beam start index field. The transmission beam start index field is used to indicate the start index of the transmission beam within one sensing measurement interaction, and the reception beam start index field is used to indicate the start index of the reception beam within the aforementioned one sensing measurement interaction.

[0178] 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.

[0179] In the embodiments of the present application, by indicating the start index of the transmission beam and the start index of the reception beam, the transceiving parties can effectively learn the transmission beam and the reception beam. Therefore, the transceiving parties can reasonably adjust the transmission beam and the reception beam of each PPDU within the sensing measurement interaction, improve the flexibility of PPDU configuration, and improve the communication efficiency.

[0180] In a possible implementation, before step 201, or before step 202, the method shown in FIG. 2 further includes:

[0181] The first station sends repetition number information, which is used to indicate the repetition number of the transmission beam. Correspondingly, the second station receives the repetition number information.

[0182] Alternatively, the second station sends repetition number information, which is used to indicate the repetition number of the transmission beam. Correspondingly, the first station receives the repetition number information.

[0183] As an example, the repetition number information is contained in a control frame. The control frame can be transmitted on high frequency or low frequency. Through the repetition number information, the repetition number of the transmission beam can be configured for each sensing measurement interaction. For example, the repetition number information can be carried in a repetition (Rep) field in the control frame.

[0184] As another example, the repetition number 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 repetition number information, the repetition number of the transmission beam can be configured for a sensing measurement session. In this case, the repetition number of the transmission beam in each sensing measurement interaction is the same. For example, the repetition number information can be carried in a Rep field in the sensing measurement request frame.

[0185] As a further example, the repetition number information is contained in a physical layer header of the PPDU. The physical layer header includes a SIG field or a header field.

[0186] The transmission beam list, the reception beam list, the first quantity information, the second quantity information, the first index information, the second index information, and the repetition number information shown above can be contained in the same frame or different frames, and embodiments of the present application do not limit this.

[0187] 203. The second station parses the N PPUs.

[0188] The second station parses the N PPUs, including that the second station determines a sensing measurement result according to the N PPUs, or determines a beam training result according to the N PPUs, or determines a channel measurement result according to the N PPUs. The sensing measurement result mentioned here is the sensing measurement result of the N PPUs, and similarly, the beam training result is the beam training result of the N PPUs, and the channel measurement result is the channel measurement result of the N PPUs. The description of the N PPUs can refer to step 201, and will not be repeated here.

[0189] In embodiments of the present application, the two stations can perform channel measurement or sensing or beam training as long as they meet the above conditions, so that the two stations can flexibly adjust the transmission beam or reception beam of a single PPU, and improve the flexibility of PPU configuration.

[0190] FIG. 5 is a schematic diagram of a scenario of a communication method in the prior art. As shown in FIG. 5, when sensing or channel measurement or beam training is performed through a millimeter wave frequency band, a sensing device can transmit an NDPA frame on a low frequency, and then switch to a high frequency to transmit an NDP in multiple directions. When the sensing transmitting end needs to perform measurement or beam training or sensing in multiple directions, the sensing transmitting end transmits one or more PPUs in each direction, and the PPUs in different directions are separated by a time interval, such as a short interframe space (SIFS). The time interval between the PPUs reduces the measurement efficiency.

[0191] Therefore, embodiments of the present application also provide a communication method, in which a format of a PPU is designed, and beam training or sensing measurement or channel measurement in different directions is realized through a first field in the PPU, thereby improving the measurement efficiency.

[0192] FIG. 6 is another flowchart of a communication method according to an embodiment of the present application. The first station and the second station involved in the communication method can refer to the above description, and will not be described here. As shown in FIG. 6, the method includes:

[0193] In a possible implementation, the method shown in FIG. 6 includes step 601.

[0194] 601. The first station generates a PPDU. The PPDU includes one or more unit fields, each of which includes one or more first fields, each of which includes one or more second fields, each of which includes one or more LTFs. One first field corresponds to one transmit beam, and the number of second fields within one first field indicates the number of repetitions of the transmit beam.

[0195] One first field corresponds to one transmit beam, and one first field can also correspond to one direction. The LTFs within the second field can be IMMW-LTFs. 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.

[0196] The embodiments of the present application do not limit the specific format of the LTF.

[0197] The format of the PPDU can be referred to below, and will not be described in detail here.

[0198] 602. The first station transmits the PPDU, and correspondingly, the second station receives the PPDU.

[0199] In a possible implementation, the method shown in FIG. 6 includes step 603.

[0200] 603. The second station parses the PPDU.

[0201] In the embodiments of the present application, the first fields in the PPDU are used to implement beam training or sensing or channel measurement in different directions. When the first station performs beam training or sensing or channel measurement in different directions, there is no need to separate different PPDUs by a period of time, and the interval between different PPDUs in different directions is omitted, thereby improving the measurement efficiency or the sensing efficiency or the beam training efficiency.

[0202] The format of the PPDU related to the embodiments of the present application is described below.

[0203] In a possible implementation 1, the PPDU includes one or more unit fields, each of which includes a plurality of first fields, each of which includes one or more second fields.

[0204] Optionally, the one or more unit fields can be included in the measurement field. Optionally, the structures of the plurality of unit fields can be the same. 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 plurality of unit fields except the last unit field can be the same. The structures of the unit fields remain the same, which facilitates the second station to perform beam training or channel measurement or sensing measurement multiple times, and improves the accuracy of the measurement.

[0205] When the number of the second fields in a first field is one, the number of repetitions of the transmit beam corresponding to the first field is one. When the number of the second fields in a first field is multiple (e.g., two or more), the number of repetitions of the transmit beam corresponding to the first field is multiple.

[0206] FIG. 7 is a schematic diagram of the 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, reference can be made to the description of the first field 1. As shown in FIG. 7, the unit field includes the first field 1 to the first field n. n is an integer greater than or equal to 2. Each first field includes two second fields, and each second field includes two LTFs. Each first field shown in FIG. 7 includes two second fields, and each second field includes two LTFs, which are only examples. In a specific implementation, each first field can include more or fewer second fields, and each second field can include more or fewer LTFs.

[0207] Embodiments of the present application do not limit whether the number of the first fields included in each unit field is the same, and similarly, do not limit whether the number of the second fields included in each first field is the same.

[0208] In embodiments of the present application, each first field 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 based on FIG. 7, and therefore, other descriptions about FIGS. 8a-8e can also refer to FIG. 7.

[0209] As an example 1, each first field in a 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 one.

[0210] FIG. 8a is a schematic diagram of the relationship between the first field in a unit field and the transmit beam according to an embodiment of the present application. As shown in FIG. 8a, the first field 1 corresponds to the direction 1, that is, the first field 1 corresponds to the transmit beam 1. The first field 2 corresponds to the direction 2, that is, the first field 2 corresponds to the transmit beam 2. Similarly, the first field n corresponds to the direction n, that is, the first field n corresponds to the transmit beam n.

[0211] For example 1, the first station can implement beam training or sensing or channel measurement in different directions through the first fields in the PPDU, which improves the measurement efficiency.

[0212] As another example 2, each first field in a unit field corresponds to a transmit beam, and at least two first fields correspond to the same transmit beam. For example, a unit field includes n first fields, such as first field 1 to first field n. First field 1 to first field n1 can correspond to the same transmit beam. That is, the number of first fields corresponding to the same transmit beam is n1. Optionally, first field n1+1 to first field n2 correspond to the same transmit beam. That is, the number of first fields corresponding to the same transmit beam is n2-n1. Here, it is not listed one by one. n1 and n2 can be positive integers less than n. n2 is greater than n1.

[0213] FIG. 8b is a schematic diagram of the relationship between the first field in the unit field and the transmit beam according to an embodiment of the present application. As shown in FIG. 8b, first field 1 and first field 2 can correspond to the same direction, that is, first field 1 and first field 2 can correspond to the same transmit beam. Or, the first fields corresponding to the same direction 1 are first field 1 and first field 2.

[0214] As another example 3, each first field in a unit field corresponds to a transmit beam, and each first field corresponds to the same transmit beam.

[0215] FIG. 8c is a schematic diagram of the relationship between the first field in the unit field and the transmit beam according to an embodiment of the present application. As shown in FIG. 8c, first field 1 to first field n can correspond to the same direction (such as direction 1), that is, first field 1 to first field n can correspond to the same transmit beam.

[0216] Since each first field in the unit field corresponds to the same transmit beam, the transmit beam corresponding to the first field is also the transmit beam corresponding to the unit field. For different unit fields, the following examples can also be provided:

[0217] For example, the PPDU includes at least two unit fields, each unit field corresponds to a transmit beam, and different unit fields correspond to different transmit beams. That is, the number of unit fields corresponding to the same transmit beam is 1.

[0218] FIG. 8d is a schematic diagram of the relationship between the unit field and the transmit beam according to an embodiment of the present application. As shown in FIG. 8d, unit field 1 corresponds to direction 1, that is, unit field 1 corresponds to transmit beam 1. Unit field 2 corresponds to direction 2, that is, unit field 2 corresponds to transmit beam 2.

[0219] For another example, the PPDU includes at least two unit fields, each unit field corresponding to one transmit beam, the at least two unit fields corresponding to the same transmit beam, and the at least two unit fields corresponding to different transmit beams.

[0220] For another example, the PPDU includes at least two unit fields, each unit field corresponding to one transmit beam, different unit fields corresponding to the same transmit beam. This example can better adapt to the following scenario: continuously transmitting unit fields in one direction for the second station to receive (such as receiving in multiple different directions). Thus, the same transmit beam is corresponded to across multiple unit fields, the stability of the beam can be maintained, so that the more beams the second station can switch.

[0221] FIG. 8e is a schematic diagram of the relationship between unit fields and transmit beams according to an embodiment of the present application. As shown in FIG. 8e, unit field 1 and unit field 2 both correspond to direction 1, that is, unit field 1 and unit field 2 correspond to the same transmit beam.

[0222] In the embodiments of the present application, different unit fields correspond to the same transmit beam, which can better support the scenario that the number of receive beams of the second station is large.

[0223] In a possible implementation form 2, the PPDU includes one or more unit fields, each unit field including one first field, and each first field including one or more second fields.

[0224] When the number of second fields in a first field is 1, the number of repetitions of the transmit beam corresponding to the first field is 1. When the number of first fields in a unit field is 1, the transmit beam corresponding to the first field is also the transmit beam corresponding to the unit field. Alternatively, when the number of first fields in each unit field is 1, the relationship between the unit field, the first field and the second field can also be: the unit field includes one or more second fields. That is, there can be no distinction between the first fields.

[0225] FIGS. 9a and 9b are schematic diagrams of the format of a unit field according to an embodiment of the present application. As shown in FIG. 9a, the number of first fields in a unit field is 1. Each first field can include multiple second fields, that is, the number of repetitions of the transmit beam corresponding to the first field is greater than or equal to 2. As shown in FIG. 9b, the number of first fields in a unit field is 1, and the number of second fields in the first field is 1. That is, the number of repetitions of the transmit beam corresponding to the first field is 1.

[0226] Since the number of the first fields in one unit field is 1, the transmitting beam corresponding to the first field is also the transmitting beam corresponding to the unit field. As an example, the PPDU includes at least two unit fields, each unit field corresponds to one transmitting beam, and different unit fields correspond to different transmitting beams. As another example, the PPDU includes at least two unit fields, each unit field corresponds to one transmitting beam, and at least two unit fields correspond to the same transmitting beam. Optionally, at least two unit fields correspond to different transmitting beams. As yet another example, the PPDU includes at least two unit fields, each unit field corresponds to one transmitting beam, and different unit fields correspond to the same transmitting beam. The relationship between the unit field and the transmitting beam can also be referred to the description of Example 3 above, and will not be described one by one here.

[0227] 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.

[0228] In the embodiments of the present application, the number of the second fields in the first field represents the number of repetitions of the transmitting 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, etc. The PPDU shown in the embodiments of the present application can be transmitted at high frequency. The description of high frequency and low frequency can be referred to FIG. 2, and will not be described here in detail.

[0229] In a possible implementation, the first station is required to complete beam switching (complete 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 is required to complete 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 be 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.

[0230] In a possible implementation 3, the first first field further includes a third field. The third field is used for at least one of the following: beam switching, AGC adjustment, synchronization, or phase tracking. The third field can be an LTF or a short training field (STF). The LTF includes an IMMW-LTF. The IMMW-LTF includes one or more IMMW-LTF symbols. The STF includes an IMMW-STF. The IMMW-STF includes one or more IMMW-STF symbols. Alternatively, the direction of the third field can be along the trained direction, such as along the direction of the sensing receiver. Alternatively, the direction of the third field can be the same as the direction of the SIG field or the header field of the PPDU including the third field. The number of the third fields is not limited in the embodiments of the present application.

[0231] FIG. 10a is a format diagram of a unit field according to an embodiment of the present application. As shown in FIG. 10a, the unit field 1 includes a first field 1 and a first field 2. The first field 1 further includes an LTF or an STF before the first field 1. The first field 2 further includes an LTF or an STF before the first field 2. The number of the first fields included in one unit field shown in FIG. 10a is only an example, and other descriptions of FIG. 10a can be referred to FIGs. 7-9b, which will not be described here in detail.

[0232] In the embodiments of the present application, since the first field can correspond to one transmission beam, the third field before the first field can enable the first station to have sufficient time for beam switching.

[0233] In a possible implementation 4, a first duration is arranged 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 send any field in the first duration. In the first duration, the first station can perform beam switching.

[0234] As an example, the first duration is 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.

[0235] In the case that the first duration is configured by the sensing initiator, the sensing initiator can send 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.

[0236] FIG. 10b is a schematic diagram of the format of a unit field provided by the embodiments of the present application. As shown in FIG. 10b, a first duration is arranged between two adjacent first fields, and the first duration is denoted as Tgap. FIG. 10b is an example taking the first field 1 and the first field 2 as an example. Optionally, the first field in the unit field and the field before the first field can also be arranged with a first duration. As shown in FIG. 10b, the first field 1 is arranged with Tgap before it. The description of the LTF / STF shown in FIG. 10b can refer to FIG. 10a, and will not be described in detail herein.

[0237] 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.

[0238] In a possible implementation 5, a fourth field is arranged before the first field in the unit field. In other words, the fourth field can be arranged at the beginning of each unit field. The fourth field is used for at least one of the following: beam switching, AGC adjustment, synchronization, or phase tracking. The second station can complete the above functions through the fourth field. Optionally, the direction of the fourth field can be along the trained direction, such as along the direction of the sensing responder. Optionally, the direction of the fourth field can be the same as the direction of the SIG field or the header field of the PPDU including the third field. For example, the first station can send the fourth field to the second station along the trained direction.

[0239] Exemplarily, the fourth 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.

[0240] FIG. 11a is a schematic diagram of a format of a unit field according to an embodiment of the present application. FIG. 11a exemplarily shows n first fields, and a first field 1 and a first field 2 in the n first fields are included in a unit field 1. The unit field 1 can further include more first fields, which are not shown in FIG. 11a. A first field n is included in a unit field X (not shown in FIG. 11a). That is, the dashed box including the first field 1 and the first field 2 shown in FIG. 11a represents a unit field, and the dashed box including the first field n represents another unit field. FIG. 11a exemplarily shows two unit fields, and the number of the unit fields shown in FIG. 11a is merely an example and does not limit the embodiments of the present application. FIG. 11a also exemplarily shows that one first field includes two second fields. The number of the second fields in the first fields shown in FIG. 11a is merely an example and does not limit the embodiments of the present application.

[0241] As shown in FIG. 11a, the first first field in the unit field 1 is followed by an STF / LTF (i.e., a fourth field). The first first field in the unit field X is followed by an STF / LTF (i.e., a fourth field).

[0242] FIG. 11b is a schematic diagram of a format of a unit field according to an embodiment of the present application. FIG. 11b exemplarily shows a unit field including a first field 1 and a first field 2. The first field 1 includes a second field 11 and a second field 12, and the first field 2 includes a second field 21 and a second field 22. As shown in FIG. 11b, in a unit field, a first field is followed by a third field, and the first first field in the unit field is followed by a fourth field. The third field and the fourth field are described above, and are not described herein again.

[0243] The relationship between the first field and the transmission beam in FIG. 11a and FIG. 11b is described above in the implementation manner 1 or the implementation manner 2, and is not described herein again.

[0244] In a possible implementation 6, the first unit field in the PPDU is preceded by a fifth field. The fifth field can be an STF or an LTF. The LTF includes an IMMW-LTF, which includes one or more IMMW-LTF symbols. The STF includes an IMMW-STF, which includes one or more IMMW-STF symbols. Exemplarily, the fifth 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.

[0245] The numbering in the above implementations 1-6 is set for ease of reference, and does not limit the embodiments of the present application. The above implementations 1, 3-6 can be combined with each other, or the above implementations 2-6 can be combined with each other.

[0246] The following describes the PPDU for beam training or sensing or channel measurement provided by the embodiments of the present application, taking an IMMW PPDU as an example. The IMMW PPDU shown below is only an example, and does not limit the embodiments of the present application.

[0247] 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 an IMMW-STF, an IMMW-LTF, an IMMW-SIG (or a header), a data field, an IMMW-STF / LTF, or a unit field. FIG. 12 exemplarily shows two unit fields, and the ellipsis omits more unit fields. 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, and the name of each field is not limited by the embodiments of the present application.

[0248] Exemplarily, the IMMW-STF is used for automatic gain control, such as AGC adjustment, of a subsequent field. The IMMW-LTF is used for channel estimation. The data field is used to carry data information. The IMMW-SIG field is used to carry structure information in the unit field of the PPDU, and / or carry signaling for demodulating subsequent data. The unit field is used for beam training or sensing or channel measurement. The unit field can be described with reference to the above implementations 1-6, and will not be described in detail here.

[0249] The first station can transmit the fields before the first unit field in the PPDU in an omni direction or a directional manner. Optionally, the first station can transmit the fields before the first unit field in the PPDU in a directional manner when the PPDU includes a data field. The directional manner can be a trained direction, such as a direction facing the second station. Optionally, the second station can also receive the fields before the first unit field in the PPDU in an omni direction or a directional manner.

[0250] FIGS. 13a and 13b are schematic diagrams of a PPDU format according to an embodiment of the present application. As shown in FIGS. 13a and 13b, the PPDU includes at least one of IMMW-STF, IMMW-LTF, IMMW-SIG (or header), data field, IMMW-STF / LTF or unit field. The dashed box shown in FIGS. 13a and 13b represents a unit field. As shown in FIGS. 13a and 13b, the unit field includes IMMW-STF (which is an example of the fourth field shown above), first field 1 and first field 2.

[0251] As shown in FIG. 13a, the first field 1 corresponds to direction 1 and is repeated twice. The first field 2 corresponds to direction 2 and is repeated twice. That is, different first fields in the unit field in FIG. 13a can correspond to different transmit beams.

[0252] As shown in (1) of FIG. 13b, the first field 1 corresponds to direction 1 and is repeated twice. The first field 2 corresponds to direction 1 and is repeated twice. That is, different first fields in the unit field in FIG. 13b can correspond to the same transmit beam. Optionally, different unit fields can also correspond to the same transmit beam. When all the unit fields in the PPDU correspond to the same transmit beam, the structure of the PPDU can also be simplified as (2) of FIG. 13b.

[0253] As shown in FIGS. 13a and 13b, the fields before the first unit field in the PPDU can be in an omni direction or a directional manner. FIGS. 13a and 13b are illustrated by taking direction 0 as an example, which can be a trained direction, such as a direction facing the second station. Optionally, the IMMW-STF in the unit field can also be in an omni direction or a directional manner, which is not limited in the embodiments of the present application.

[0254] The direction of the transmit beam of the IMMW-STF before the first first field in the unit field shown in FIGS. 13a and 13b can be along a trained direction, such as a direction corresponding to the second station. The direction of the IMMW-STF in the unit field can include direction 0.

[0255] FIG. 13c is a schematic diagram of a format of a PPDU according to an embodiment of the present application. As shown in (1) of FIG. 13c, the field before the first unit field in the PPDU can be transmitted in an omni-directional or directional manner (e.g., corresponding to direction 1). Each unit field in the PPDU corresponds to the same transmit beam, which can be in direction 1. When the transmit beam corresponding to the field before the first unit field in the PPDU is the same as the transmit beam corresponding to the unit field, it can also be understood that the entire PPDU is transmitted using the same transmit beam. In this case, the structure of the PPDU can also be simplified as shown in (2) of FIG. 13c.

[0256] Other descriptions related to FIG. 13c can be found in FIG. 13a or FIG. 13b, and the like, which will not be described in detail herein. FIG. 13a to FIG. 13c exemplarily show a specific manner of combining the implementation manner 1 to the implementation manner 6, and other manners of combination will not be listed one by one herein.

[0257] 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 the following: 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, or a unit field. FIG. 14 exemplarily shows two unit fields, and the ellipsis omits a larger number of unit fields.

[0258] For example, the L-STF is used for discovery of the PPDU, coarse synchronization, and automatic gain control. The L-LTF is used for fine synchronization and channel estimation. The L-SIG can be used to carry information related to the length of the PPDU. Other descriptions related to FIG. 14 can be found in FIG. 12, and the like, which will not be described in detail herein.

[0259] In the embodiments of the present application, the number of transmit beams corresponding to the first field in the PPDU can be determined by the transmit beam list or the first number information, and the repetition number of the transmit beam can be determined by the repetition number information. The transmit beam corresponding to the first field and the repetition number of the transmit beam can be found in FIG. 2, which will not be described in detail herein.

[0260] Optionally, the PPDU in the sensing measurement interaction is N PPDU, and the transmitting beam and the repetition number of the transmitting beam of the N PPDU and the receiving beam and the repetition number of the receiving beam of the N PPDU can satisfy: the operation result of the transmitting beam and the repetition number of the transmitting beam is equal to the operation result of the receiving beam and the repetition number of the receiving beam of the N PPDU. Optionally, the PPDU in the sensing measurement session is N PPDU, and the transmitting beam and the repetition number of the transmitting beam of the N PPDU and the receiving beam and the repetition number of the receiving beam of the N PPDU can satisfy: the operation result of the transmitting beam and the repetition number of the transmitting beam is equal to the operation result of the receiving beam and the repetition number of the receiving beam of the N PPDU. The description of the N PPDU can refer to FIG. 2, which is not described in detail here.

[0261] The name, length, or position of each field in the PPDU shown in the embodiments of the present application is only an example and is not a limitation of the embodiments of the present application. The embodiments of the present application are illustrated by taking the field as an example, and the field, subfield, element, or subelement is not specifically distinguished, but it should not be considered as a limitation of the embodiments of the present application. The unit of the length of each field can be bit, byte, or double byte, which is not limited in the embodiments of the present application. In the embodiments of the present application, the field shown in the dashed line part in the drawing is an optional field.

[0262] 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 multiple manners shown above.

[0263] 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 manners shown above. In this case, the first station can select different formats of the PPDU according to different scenarios. Optionally, 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. Optionally, 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 a limitation of the embodiments of the present application.

[0264] FIG. 15 is a flow diagram of a PPDU indication method provided by the embodiments of the present application. The first station and the second station involved in the indication method can refer to the above, which is not described in detail here. As shown in FIG. 15, the method comprises:

[0265] 1501、The first station transmits indication information, the indication information being used to indicate a structure of the PPDU. Correspondingly, the second station receives the indication information.

[0266] 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.

[0267] In a possible implementation, before the first station transmits the indication information, the indication information can also be determined.

[0268] In a possible implementation, after the second station receives the indication information, the indication information can also be parsed. The second station can learn the structure of the PPDU by parsing the indication information.

[0269] 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 above, which will not be repeated here.

[0270] As another example, the indication information is contained in a physical layer header of the PPDU. The physical layer header includes a SIG field, or a header field. As for an IMMW PPDU, the physical layer header includes an IMMW-SIG field or an IMMW-header field.

[0271] The content of the indication information related to the embodiments of the present application is introduced below.

[0272] In a possible implementation, the indication information is used to indicate at least one of the following: a number of unit fields in the PPDU; a number of first fields in the unit fields; a number of second fields in the first fields; or a number of LTF symbols in the LTF fields in the second fields.

[0273] In a possible implementation, the indication information is also used to indicate at least one of the following:

[0274] whether a third field is included in the unit field, or a number of symbols in the third field, the number of symbols being greater than or equal to 0; a first time length of an interval between two first fields; whether a fourth field is included in the unit field, or a number of symbols in the fourth field, the number of symbols being greater than or equal to 0; or whether a fifth field is included in the PPDU, or a number of symbols in the fifth field, the number of symbols being greater than or equal to 0.

[0275] The description about the first time length can refer to the description in the implementation 4 above, which will not be repeated here.

[0276] 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 fields A, fields B, etc. shown below are named to distinguish different fields, and the specific names of the fields A to fields X are not limited by the embodiments of the present application.

[0277] 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 is not limited by the embodiments of the present application. For ease 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 by the embodiments of the present application.

[0278] As a possible implementation, the indication information includes at least one of the fields (1) to (6) shown below.

[0279] (1) The number of unit fields in the PPDU:

[0280] 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.

[0281] 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 to 2 n -1. That is, the number of unit fields in the PPDU ranges from 0 to 2 n -1.

[0282] 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 to 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 ease of description, the lengths of different fields shown below are taken as n for description, but the lengths of different fields can be different in specific implementation.

[0283] As another example, the relationship between the value of field A and the number of unit fields in the PPDU is discrete. For example, the value of field A can correspond to a discrete number. The relationship between the value of field A and the number of unit fields in the PPDU is as follows: the value of field A is a first value, the number of unit fields in the PPDU is 0; the value of field A is a second value, the number of unit fields in the PPDU is 2; the value of field A is a third value, the number of unit fields in the PPDU is 4, and so on.

[0284] Embodiments of the present application do not limit the relationship between the value of a field and the number corresponding to the value. The above-mentioned relationship between the value of a field and the number is also applicable to the following, which will not be described again.

[0285] (2) Number of first fields in a unit field:

[0286] The number of first fields in a unit field can be carried in field B. For example, for an IMMW PPDU, field B can also be referred to as an IMMW user block number field, and the specific name of field B is not limited in embodiments of the present application.

[0287] The number of first fields in a unit field indicated by field B ranges from 1 to 2 n , or is a discrete number, and so on. n is the length of field B. The relationship between the value of field B and the number corresponding to the value can be referred to in (1) above, which will not be described again.

[0288] Optionally, the number of first fields in each unit field is the same. This structure is simple and has low complexity.

[0289] (3) Second field:

[0290] The structure of the first field can be indicated by a Rep field and an NSTS field. For example, the number of second fields in the first field can be carried in the Rep field, that is, the Rep field can be used to indicate the number of repetitions 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.

[0291] The number of second fields indicated by the Rep field can range from 1 to 2 n , or be a discrete number, and so on. n is the length of the Rep field. When the value of the Rep field is 0, the number of second fields is 1.

[0292] 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 nn 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. Alternatively, when multiple-in multiple-out (MIMO) is not supported, the indication information does not include the NSTS field.

[0293] 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 refer to the above, and will not be described in detail here.

[0294] (4) The third field:

[0295] Whether the third field is included in the unit field or the number of symbols in the third field can be carried in the field C. As for the IMMW PPDU, the field C can also be referred to as the IMMW field C.

[0296] When the third field is STF, the field C can be used to indicate whether the STF field is included before each first field in the unit field or the number of STF symbols in the STF field.

[0297] When the third field is LTF, the field C can be used to indicate whether the LTF field is included before each first field in the unit field or the number of LTF symbols in the LTF field.

[0298] The field C can be used to indicate whether the third field is included before each first field in the unit field. In the case where the field C indicates that the third field is 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.

[0299] The field C can be used to indicate the number of symbols in the third field. The number of symbols indicated by the field C can range from 0 to 2 n -1; or 1 to 2 n ; or a discrete number, etc. n is the length of the 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 the field C and the number corresponding to the value can refer to the above (1), and will not be described in detail here.

[0300] (5) The fourth field:

[0301] Whether the fourth field is included in the unit field or the number of symbols in the fourth field can be carried in the field D. As for the IMMW PPDU, the field D can also be referred to as the IMMW field D.

[0302] When the fourth field is STF, field D can be used to indicate whether the first first field in the unit field is preceded by an STF field or the number of STF symbols in the STF field.

[0303] When the fourth field is LTF, field D can be used to indicate whether the first first field in the unit field is preceded by an LTF field or the number of LTF symbols in the LTF field.

[0304] Field D can be used to indicate whether the first first field in the unit field is preceded by a fourth field. In the case where field D indicates that the unit field includes a fourth field, the number of symbols in the fourth field can be defined by a standard, or determined by the sensing initiator, etc., which is not limited by embodiments of the present application.

[0305] 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 to 2 n ; or a discrete number, etc. n is the length of field D. When the number of symbols is 0, it indicates that the unit field does not include a fourth field. The relationship between the value of field D and the number corresponding to the value can be referred to (1) above, which will not be described in detail here.

[0306] (6) Fifth field:

[0307] Whether the first unit field in the PPDU is preceded by a fifth field or the number of symbols in the fifth field can be carried in field E. As for the IMMW PPDU, field E can also be referred to as the IMMW field E.

[0308] When the fifth field is STF, field E can be used to indicate whether the first unit field in the PPDU is preceded by an STF field or the number of STF symbols in the STF field.

[0309] When the fifth field is LTF, field E can be used to indicate whether the first unit field in the PPDU is preceded by an LTF field or the number of LTF symbols in the LTF field.

[0310] Field E can be used to indicate whether the first unit field in the PPDU is preceded by a fifth field. In the case where field E indicates that the PPDU includes a fifth field, the number of symbols in the fifth field can be defined by a standard, or determined by the sensing initiator, etc., which is not limited by embodiments of the present application.

[0311] Field E can be used to indicate the number of symbols in the fifth field. The number of symbols indicated by field E can range from 0 to 2 n -1; or 1 to 2 nor a discrete number, etc. n is the length of field E. When the number of symbols is 0, it indicates that the fifth field is not included in the unit field. The relationship between the value of field E and the number of symbols corresponding to the value can refer to (1) above, which will not be described in detail here.

[0312] In the embodiments of the present application, the second station can determine the structure of the PPDU through the fields shown in (1) to (6) above.

[0313] 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, i.e., the number of first fields corresponding to the same transmission beam in each unit field is 1. For 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.

[0314] Optionally, the number of first fields corresponding to the same transmission beam is a fixed value. For example, the number of first fields corresponding to the same transmission beam in the unit field is 1, or 2, etc., which will not be listed one by one here.

[0315] Optionally, the number of unit fields corresponding to the same transmission beam is a fixed value. For example, the number of unit fields corresponding to the same transmission beam is 1, or 2 or 3, etc., which will not be listed one by one here.

[0316] In a possible implementation, the indication information can also be used to indicate at least one of the following: the number of transmission beams corresponding to the unit field (or the number of transmission beams in the unit field); the number of first fields corresponding to the same transmission beam; the number of unit fields corresponding to the same transmission beam; or, all the fields in the PPDU correspond to the same transmission beam. The indication information can include at least one of the fields shown in (7) to (10) below.

[0317] (7) The number of transmission beams corresponding to the unit field:

[0318] In the embodiments of the present application, one first field can correspond to one transmission beam, and the number of first fields corresponding to the same transmission beam can be one or more. Therefore, one unit field can correspond to one or more transmission beams, or in other words, the number of transmission beams in one unit field can be one or more.

[0319] The number of the transmission beams corresponding to the unit field can be carried in the field F. In other words, the field F is used to indicate the number of the transmission beams in a unit field. As for the IMMW PPDU, the field F can also be referred to as the IMMW field F, or the IMMW-DIR field.

[0320] The number of the transmission beams indicated by the field F can range from 0 to 2 n -1; or 1-2 n ; or a discrete number, etc. n is the length of the field F. The relationship between the value of the field F and the number corresponding to the value can refer to (1) above, which will not be described in detail here.

[0321] Optionally, the number of the first fields in each unit field is the same. Optionally, when the number of the first fields corresponding to the same transmission beam is 1, the indication information includes the field F, or the field B. That is, the number of the transmission beams in the unit field indicated by the field F is equal to the number of the first fields in the unit field indicated by the field B.

[0322] (8) The number of the first fields corresponding to the same transmission beam:

[0323] The number of the first fields corresponding to the same transmission beam can be carried in the field G. In other words, the field G is used to indicate the number of the first fields transmitted in each direction in a unit field. As for the IMMW PPDU, the field G can also be referred to as the IMMW field G.

[0324] The number of the first fields corresponding to the same transmission beam indicated by the field G can range from 1 to 2 n ; or a discrete number, etc. n is the length of the field G. The relationship between the value of the field G and the number corresponding to the value can refer to (1) above, which will not be described in detail here.

[0325] The field B can be used to indicate the number of the first fields in a unit field. The field F and the field G can also be used to indicate the number of the first fields in a unit field. The number of the first fields in a unit field = the number of the transmission beams in the unit field indicated by the field F * the number of the first fields corresponding to the same transmission beam indicated by the field G.

[0326] (9) The number of the unit fields corresponding to the same transmission beam:

[0327] The number of the unit fields corresponding to the same transmission beam can be carried in the field H. In other words, the field H is used to indicate how many unit fields correspond to the same transmission beam. As for the IMMW PPDU, the field H can also be referred to as the IMMW field H.

[0328] The field H indicates the number of unit fields corresponding to the same transmit beam, and the number ranges from 1 to 2 n ; or a discrete number, etc. n is the length of the field H. The relationship between the value of the field H and the number corresponding to the value can refer to (1) above, which will not be described in detail here.

[0329] (10) All fields in the PPDU correspond to the same transmit beam:

[0330] The information that all fields in the PPDU correspond to the same transmit beam can be carried in the field I. In other words, the field I is used to indicate whether all fields in the PPDU correspond to the same transmit beam, or in other words, the field I is used to indicate whether the entire PPDU is transmitted using the same beam.

[0331] Through the fields G-I above, the relationship between the first field and the transmit beam, or the relationship between the unit field and the transmit beam, can be more clearly indicated.

[0332] For example, for the PPDU shown in the implementation modes 1-6 above, the indication information can include at least one of the fields (1)-(6) above. Optionally, for example 2 in implementation mode 1, the indication information can also include the fields (7) and (8) above. Optionally, for example 3 in implementation mode 1, the indication information can also include the field (9) above. Optionally, for all fields in the PPDU corresponding to the same transmit beam, the indication information can also include the field (10) above.

[0333] In the embodiments of the present application, for PPDU of different structures, the fields included in the indication information can be different. In this case, the fields not involved will not appear in the indication information. Alternatively, for PPDU of different structures, the fields included in the indication information can be the same. In this case, the fields not involved are reserved fields. Here, the description of the PPDU and the fields also applies to the fields (a)-(f) below, which will not be described here.

[0334] In a possible implementation, the indication information is used to indicate the information of the relationship between the first field and the transmission beam, or is used to indicate the information of the relationship between the unit field and the transmission beam. The information is used to indicate that each unit field of the PPDU corresponds to a plurality of transmission beams (as shown in FIG. 8b or FIG. 13a) (for example, the unit field includes a plurality of first fields, the number of the first fields corresponding to the same transmission beam is 1, or the number of the first fields corresponding to the same transmission beam is 2, and so on); or is used to indicate that each unit field in the PPDU corresponds to one transmission beam, and the number of the unit fields corresponding to the same transmission beam is 1 (as shown in FIG. 8c or FIG. 8d or FIG. 8e or FIG. 13b); or is used to indicate that all the fields in the PPDU correspond to the same transmission beam (as shown in FIG. 13c).

[0335] The information can be carried in the field J. The relationship between the value and the meaning of the field J is as follows: the value of the field J is 0, the structure of the PPDU is as shown in FIG. 13a; the value of the field J is 1, the structure of the PPDU is as shown in FIG. 13b; the value of the field J is 2, the structure of the PPDU is as shown in FIG. 13c. Of course, the relationship between the value and the meaning of the field J shown here is only an example, and is not a limitation on the embodiments of the present application. The description of the field J here is also applicable to the fields shown in (a)-(f) below, and will not be repeated hereinafter.

[0336] By using the field J to indicate the relationship between the first field and the transmission beam, or the relationship between the unit field and the transmission beam, the format of the indication information can be more concise, the indication information can be simplified, and the signaling overhead can be saved.

[0337] The fields shown above, such as the fields A-J, can be carried in the same information, such as the indication information; or the fields A-J can also be carried in different information, such as part of the fields are carried in the header-A in the PPDU, and another part of the fields are carried in the header-B in the PPDU; or the fields A-J are carried in the control frame of the PPDU, such as all the fields are carried in the same control frame, or part of the fields are carried in the control frame 1, and another part of the fields are carried in the control frame 2, and so on. For example, when the values in all the sensing measurement interactions in one sensing measurement session are the same, the corresponding fields can be carried in the management frame, such as the sensing measurement request frame. When the values in the sensing measurement interactions are different, the corresponding fields can be carried in the control frame in the sensing measurement interaction, such as the DMG sensing request frame or the sensing NDPA frame or the probe trigger frame or the newly defined frame, and so on, which will not be listed one by one here. The values shown here can be the values or contents indicated by the fields A-I above. The specific position or name of each field is not limited in the embodiments of the present application. The description of the field position here is also applicable to the fields shown in (a)-(f) below, and will not be repeated hereinafter.

[0338] In the embodiments of the present application, the second station can learn the structure of the single unit field according to the field B, the Rep field, the NSTS field, the field C or the field D, learn the transmission beam situation in the unit field in combination with the fields F-I, learn the number of unit fields in the PPDU in combination with the field A, and learn the structure after the data field in the PPDU in combination with the field E. Thus, the second station can accurately parse the PPDU. Alternatively, the data field can not be included in the PPDU.

[0339] As another possible implementation, the indication information includes at least one of the fields (a)-(f) shown below.

[0340] (a) The number of unit fields in the PPDU:

[0341] The number of unit fields in the PPDU can be carried in the field A. The description about the number of unit fields in the PPDU can refer to the description of (1) above, which will not be repeated here.

[0342] (b) The second field:

[0343] 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, which will not be repeated here.

[0344] (c) The number of fields and the number of symbols in the unit field:

[0345] The number of fields in each unit field can be carried in the field K. The number of fields indicated by the field K can range from 1 to 2 n ; or a discrete number, etc. n is the length of the field K.

[0346] The field L is used to indicate the total number of symbols of one or more first fields in the unit field. Alternatively, the field L is used to indicate the number of second fields in each unit field. Alternatively, the field L is used to indicate the number of first fields in each unit field.

[0347] As an example, taking the case that the 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 the field L ranges from 1 to 2 n, or a discrete number, etc. n is the length of field L. When the number of first fields corresponding to the same transmit beam is 1, the number of transmit 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). Optionally, when the number of first fields corresponding to the same transmit beam is greater than 1, the indication information can further include field G. The number of transmit 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 transmit beam indicated by field G).

[0348] 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 ranges from 1 to 2 n , or a discrete number, etc. n is the length of field L. When the number of first fields corresponding to the same transmit beam is 1, the number of transmit 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). Optionally, when the number of first fields corresponding to the same transmit beam is greater than 1, the indication information can further include field G. The number of transmit 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 transmit beam indicated by field G).

[0349] 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 ranges from 1 to 2 n , or a discrete number, etc. n is the length of field L. When the number of first fields corresponding to the same transmit beam is 1, the number of transmit beams corresponding to each unit field is equal to the number of first fields indicated by field L. Optionally, when the number of first fields corresponding to the same transmit beam is greater than 1, the indication information can further include field G. The number of transmit beams corresponding to each unit field is equal to the number of first fields indicated by field L / the number of first fields corresponding to the same transmit beam indicated by field G.

[0350] (d) Fifth field:

[0351] Whether the fifth field is included before the first unit field in the PPDU, or the number of symbols in the fifth field can be carried in field E. The description of the fifth field can refer to the description of (6) above, which will not be repeated here.

[0352] (e) Number of unit fields corresponding to the same transmit beam:

[0353] The number of unit fields corresponding to the same transmit beam can be carried in field H. The description of field H can refer to the description of (9) above, which will not be repeated here.

[0354] (f) All fields in the PPDU correspond to the same transmit beam:

[0355] The information that all fields in the PPDU correspond to the same transmit beam can be carried in field I. The description of field I can refer to the description of (10) above, which will not be repeated here.

[0356] For example, for the PPDU shown in the above implementation mode 1 to implementation mode 6, the indication information can include at least one of the fields shown in (a) to (d) above. Alternatively, for example 3 in implementation mode 1, the indication information can also include the field shown in (e) above. Alternatively, for the case that all fields in the PPDU correspond to the same transmit beam, the indication information can also include the field shown in (f) above.

[0357] In the embodiment of the present application, the second station can know the structure of a single unit field according to field A, field K, field L, Rep field and NSTS field, and can know the transmit beam situation in the unit field in combination with field G or field H or field I, and can know the number of unit fields in the PPDU in combination with field A, and can know the structure of data field in the PPDU in combination with field E. Thus, the second station can accurately parse the PPDU. Alternatively, the PPDU can not include the data field.

[0358] The details not described in detail above can refer to other places.

[0359] The communication device provided by the embodiment of the present application will be introduced below.

[0360] The present application divides the function modules of the communication device according to the above method embodiment, for example, each function module can be divided according to each function, or two or more functions can be integrated in one processing module. The above integrated module can be realized in the form of hardware or in the form of software function module. It should be noted that the division of the module in the present application is illustrative, and is only a logical function division, and actual implementation can have another division mode. The communication device of the embodiment of the present application will be described in detail below with reference to FIGS. 16 to 18.

[0361] Figure 16 is a structural schematic diagram of a communication apparatus provided in an embodiment of the present application. As shown in Figure 16, the communication apparatus can include a processing module 1601 and a transceiver module 1602. The transceiver module 1602 can implement corresponding communication functions, and the processing module 1601 can be configured to implement corresponding processing functions. The transceiver module 1602 can also be referred to as an interface, a communication interface, or a communication module, etc.

[0362] In some embodiments of the present application, the communication apparatus can be configured to perform actions performed by a first station in the above method embodiments. In this case, the first station can be the device itself or a chip or a functional module configured in the device, etc. The transceiver module 1602 can be configured to perform operations related to transceiving of the first station in the above method embodiments, and the processing module 1601 can be configured to perform operations related to processing of the first station in the above method embodiments.

[0363] As an example, the processing module 1601 can be configured to generate N PPDU, and the transceiver module 1602 can be configured to send or output the N PPDU. The N PPDU can be described with reference to Figures 2-4, etc. above, and thus will not be described in detail here.

[0364] As another example, the processing module 1601 can be configured to generate a PPDU, and the transceiver module 1602 can be configured to send or output the PPDU. The PPDU can be described with reference to Figures 6, implementation 1-implementation 6, etc. above, and thus will not be described in detail here.

[0365] As yet another example, the processing module 1601 can be configured to determine indication information, and the transceiver module 1602 can be configured to send or output the indication information.

[0366] Referring to Figure 16, in some other embodiments of the present application, the communication apparatus can be configured to perform actions performed by a second station in the above method embodiments. In this case, the second station can be the device itself or a chip or a functional module configured in the device, etc. The transceiver module 1602 can be configured to perform operations related to transceiving of the second station in the above method embodiments, and the processing module 1601 can be configured to perform operations related to processing of the second station in the above method embodiments.

[0367] As an example, the transceiver module 1602 can be configured to receive N PPDU, and the processing module 1601 can be configured to parse the N PPDU. The N PPDU can be described with reference to Figures 2-4, etc. above, and thus will not be described in detail here.

[0368] As another example, the transceiver module 1602 can be configured to receive a PPDU, and the processing module 1601 can be configured to parse the PPDU. The PPDU can be described with reference to Figures 6, implementation 1-implementation 6, etc. above, and thus will not be described in detail here.

[0369] As a further example, the transceiver module 1602 is configured to receive indication information, and the processing module 1601 is configured to parse the indication information.

[0370] For example, the transceiver module 1602 can be an antenna module. For another example, the transceiver module 1602 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.

[0371] In each of the above embodiments, the specific description of each term or name or step can refer to the description in the above method embodiments, which will not be repeated here.

[0372] The specific description of the transceiver module and the processing module in each of the above embodiments is only an example. For the specific functions or executed steps of the transceiver module and the processing module, please refer to the above method embodiments, which will not be repeated here.

[0373] It can be understood that the division of the modules in the above device is only a logical function division. One function module can correspond to each function, 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 implemented in the form of hardware, software, or a combination of hardware and software.

[0374] In one example, the functional units in any of the above devices can be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASICs), one or more central processing units (CPUs), one or more microcontroller units (MCUs), one or more digital signal processors (DSPs), one or more field programmable gate arrays (FPGAs), or a combination of at least two of the above integrated circuit forms.

[0375] 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 shown in FIG. 16 falls within the protection scope of the embodiments of the present application. The following introduction is only for example and does not limit the product form of the communication apparatus of the embodiments of the present application.

[0376] 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 outputted, the processor outputs the above information to the transceiver, so as to be transmitted by the transceiver. After the above information is outputted 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 inputted above information by the processor. When the processor receives the inputted information, the transceiver receives the above information and inputs it to the processor. Furthermore, after the transceiver receives the above information, the above information can need to be processed further, and then is inputted to the processor.

[0377] 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.

[0378] In some embodiments of the present application, the communication apparatus can be used to execute the steps or methods or functions executed by the first station, for example, the processor 1720 can be used to execute the functions or steps implemented by the processing module 1601 shown in FIG. 16, and the transceiver 1710 can be used to execute the functions or steps implemented by the transceiver module 1602 shown in FIG. 16. The specific description of the processor 1720 and the transceiver 1710 can be referred to the method embodiments shown in FIG. 16 or the above description, which will not be described here in detail.

[0379] In some embodiments of the application, the communication device is configured to perform the steps or methods or functions performed by the second 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 details of the processor 1720 and the transceiver 1710, reference can be made to the method embodiments shown in FIG. 16 or described above, and thus will not be repeated here.

[0380] In 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.

[0381] 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 communication device, unit or module in the embodiments of the application is indirect coupling or communication connection between the communication device, unit or module, which can be electrical, mechanical or other form, for information interaction between the communication device, unit or module. 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.

[0382] The specific connection medium between the transceiver 1710, the processor 1720 and the memory 1730 in the embodiments of the application is not limited. In FIG. 17, the memory 1730, the processor 1720 and the transceiver 1710 are connected through the bus 1740, which is represented by a thick line in FIG. 17, and the connection mode between other components is only illustrative and is not limited. The bus can be divided into address bus, data bus, 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.

[0383] In the embodiments of the 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 application. The general processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the application can be directly embodied as hardware processor execution or executed by a combination of hardware and software modules in the processor, etc.

[0384] 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), a compact disc read-only memory (CD-ROM), and the like. The memory is any storage medium that can be used to carry or store program codes in the form of instructions or data structures and can be read and / or written by a computer (such as the communication device shown in the present application and the like). 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.

[0385] The processor 1720 is mainly used for processing communication protocols and communication data, 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 converting baseband signals and radio frequency signals and processing 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, and the like, are mainly used for receiving user input data and outputting data to users.

[0386] When the communication device is powered on, the processor 1720 can read the software program in the memory 1730, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 1720 performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit converts the baseband signal into a radio frequency signal, and transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1720. The processor 1720 converts the baseband signal into data and processes the data.

[0387] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processor performing baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication device.

[0388] 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 method performed by the processor and the transceiver shown above is only an example, and the steps specifically performed by the processor and the transceiver can refer to the method described above. The dashed part in FIG. 17 represents an option.

[0389] 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 into one module, for example, an input / output interface.

[0390] FIG. 18 is another structure of a communication apparatus provided by the embodiments 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 disposed 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, which includes the logic circuit 1801 and the interface 1802.

[0391] In the embodiments of the present application, the logic circuit and the interface can also be coupled to each other. The embodiments of the present application do not limit the specific connection mode of the logic circuit and the interface. For example, the logic circuit 1801 can be used to perform the functions or steps implemented by the processing module 1601 shown in FIG. 16, and the interface 1802 can be used to perform the functions or steps implemented by the transceiving module 1602 shown in FIG. 16. For specific description of the logic circuit 1801 and the interface 1802, refer to the method embodiments shown in FIG. 16 or the above description, which will not be described in detail here.

[0392] 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.

[0393] 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 perform the method in any of the above embodiments.

[0394] The application further provides a computer program for implementing the operations and / or processes performed by each station in the method provided by the application.

[0395] The application further provides a computer readable storage medium having computer code stored therein, which, when executed on a computer, causes the computer to perform the operations and / or processes performed by each communication device in the method provided by the application.

[0396] The application further provides a computer program product comprising computer code or a computer program, which, when executed on a computer, causes the operations and / or processes performed by each station in the method provided by the application to be performed.

[0397] In several embodiments provided by the application, it should be understood that the disclosed system, communication device and method can be implemented in other manners. For example, the embodiments of the communication device described above are merely schematic; for example, the division of the modules is merely a logical function division; an actual implementation can be another division manner, for example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between different modules can be indirect couplings or communication connections through some interfaces, communication devices or modules, and can be electrical, mechanical or other forms.

[0398] The modules illustrated as separate components can or can not be physically separate, and the components illustrated as modules can or can not be physical modules, i.e., can be located in one place, or can be distributed on 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 application.

[0399] In addition, each functional module in each embodiment of the application can be integrated into a processing module, or each module can exist physically, or two or more modules can be integrated into one module. The integrated module can be implemented in the form of hardware or in the form of a software functional module.

[0400] The integrated module, if implemented in the form of a software function module and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a readable storage medium, includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in various embodiments of the present application. The aforementioned readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (read-only memory, ROM), a random access memory (random access memory, RAM), a magnetic disk or an optical disk, and various media that can store program codes.

Claims

1. A communication method characterized by comprising: The method comprises: The first station generates N physical layer convergence procedure protocol data units (PPDUs), the PPDUs being used for at least one of sensing or beam training, N being an integer greater than or equal to 1; The first station transmits the N PPDUs, the number of transmission beams and the number of repetitions of the transmission beams being equal to the number of reception beams and the number of repetitions of the reception beams, the transmission beams being beams used for transmitting the N PPDUs, and the reception beams being beams used for receiving the N PPDUs.

2. The method of claim 1, wherein, The N PPDUs are included in one sensing measurement interaction, or the N PPDUs are included in one sensing measurement session.

3. The method according to claim 1 or 2, characterized in that, The method further comprises: The first station transmits at least one of a reception beam list or a transmission beam list, or the first station receives at least one of a reception beam list or a transmission beam list; The transmission beam list is used to determine the number of transmission beams, and the reception beam list is used to determine the number of reception beams.

4. The method according to claim 1 or 2, characterized in that, The method further comprises: The first station transmits at least one of first quantity information or second quantity information, the first quantity information being used to indicate the number of transmission beams in one sensing measurement interaction, and the second quantity information being used to indicate the number of reception beams in the one sensing measurement interaction, or The first station receives at least one of first quantity information or second quantity information, the first quantity information being used to indicate the number of transmission beams in one sensing measurement interaction, and the second quantity information being used to indicate the number of reception beams in the one sensing measurement interaction.

5. The method according to any one of claims 1 to 4, characterized in that, The method further comprises: The first station transmits at least one of first index information or second index information, the first index information being used to indicate a starting index of transmission beams in one sensing measurement interaction, and the second index information being used to indicate a starting index of reception beams in the one sensing measurement interaction, or The first station receives at least one of first index information or second index information, the first index information being used to indicate a starting index of transmission beams in one sensing measurement interaction, and the second index information being used to indicate a starting index of reception beams in the one sensing measurement interaction.

6. A communication method characterized by comprising: The method comprises: The second station receives N physical layer convergence procedure protocol data units (PPDUs), the number of reception beams and the number of repetitions of the reception beams being equal to the number of transmission beams and the number of repetitions of the transmission beams, the reception beams being beams used for receiving the N PPDUs, and the transmission beams being beams used for transmitting the N PPDUs, the PPDUs being used for at least one of sensing or beam training; The second station parses the N PPDUs.

7. The method of claim 6, wherein, The N PPDUs are included in one sensing measurement interaction, or the N PPDUs are included in one sensing measurement session.

8. The method according to claim 6 or 7, characterized in that, The method further comprises: The second station receives at least one of a transmit beam list or a receive beam list; or the second station transmits at least one of a transmit beam list or 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.

9. The method according to claim 6 or 7, characterized in that, The method further includes: The second station receives at least one of first quantity information or second quantity information, the first quantity information being used to indicate the number of transmit beams within one sensing measurement interaction, and the second quantity information being used to indicate the number of receive beams within the one sensing measurement interaction; or The second station transmits at least one of first quantity information or second quantity information, the first quantity information being used to indicate the number of transmit beams within one sensing measurement interaction, and the second quantity information being used to indicate the number of receive beams within the one sensing measurement interaction.

10. The method according to any one of claims 6-9, characterized in that, The method further includes: The second station receives at least one of first index information or second index information, the first index information being used to indicate the starting index of transmit beams within one sensing measurement interaction, and the second index information being used to indicate the starting index of receive beams within the one sensing measurement interaction; or The second station transmits at least one of first index information or second index information, the first index information being used to indicate the starting index of transmit beams within one sensing measurement interaction, and the second index information being used to indicate the starting index of receive beams within the one sensing measurement interaction.

11. A communication method, comprising: The method includes: Transmitting a physical layer convergence procedure protocol data unit (PPDU), the PPDU including one or more unit fields, the unit fields including one or more first fields, the first fields including one or more second fields, and the second fields including one or more long training fields (LTFs); One of the first fields corresponds to one transmit beam, and the number of second fields in one of the first fields represents the number of repetitions of the transmit beam.

12. The method of claim 11, wherein, Each of the first fields further includes a third field; or two adjacent first fields in each of the unit fields are separated by a first time length.

13. The method according to claim 11 or 12, characterized in that, One of the unit fields includes at least two first fields, and the at least two first fields correspond to different transmit beams respectively.

14. The method of claim 11 or 12, wherein, At least two unit fields in the PPDU correspond to the same transmit beam.

15. The method according to any one of claims 11-14, characterized in that, The first first field in the unit field further includes a fourth field.

16. The method according to any one of claims 11-15, characterized in that, A physical layer header in the PPDU includes indication information, or a control frame of the PPDU includes indication information, the indication information being used to indicate the structure of the PPDU.

17. The method of claim 16, wherein, The indication information is used to indicate the structure of the PPDU, including: The indication information is used to indicate at least one of the following: 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.

18. The method of claim 17, wherein, The indication information is further used to indicate at least one of the following: whether a third field is included in the unit field, or a number of symbols in the third field, the number of symbols being greater than or equal to 0; a first time length of interval between two first fields; whether a fourth field is included in the unit field, or a number of symbols in the fourth field, the number of symbols being greater than or equal to 0.

19. The method of claim 16, wherein, the indication information is used to indicate a structure of the PPDU, comprising: the indication information is used to indicate that at least two first fields in one unit field in the PPDU correspond to different transmission beams, or at least two unit fields in the PPDU correspond to the same transmission beam.

20. A communications device, characterized by The computer program product comprises a computer readable storage medium having computer readable program code embodied therein, the computer readable program code configured such that, on execution by a computer, the computer is caused to perform the method of any one of claims 1-19.

21. A computer-readable storage medium, characterized in that, The computer readable storage medium is configured to store a computer program, the computer program being configured to, when executed by a computer, cause the computer to perform the method of any one of claims 1-19.

22. A computer program product, characterised in that, The computer program product is configured to, when executed by a computer, cause the computer to perform the method of any one of claims 1-19.

Images