WO2022222873A1 - 一种带宽指示方法、装置及相关设备 - Google Patents

一种带宽指示方法、装置及相关设备 Download PDF

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Publication number
WO2022222873A1
WO2022222873A1 PCT/CN2022/087249 CN2022087249W WO2022222873A1 WO 2022222873 A1 WO2022222873 A1 WO 2022222873A1 CN 2022087249 W CN2022087249 W CN 2022087249W WO 2022222873 A1 WO2022222873 A1 WO 2022222873A1
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bandwidth
ppdu
field
information
trigger frame
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PCT/CN2022/087249
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English (en)
French (fr)
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于健
狐梦实
刘辰辰
淦明
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/20—Negotiating bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a bandwidth indication method, apparatus, and related equipment.
  • an access point (AP) and a station (station, STA) can select different physical layer protocol data unit (PHY protocol data unit, PPDU) bandwidths for transmission according to the channel conditions.
  • PHY protocol data unit PHY protocol data unit
  • the STA performs uplink data transmission after obtaining the transmission right through channel competition.
  • the 802.11ax standard further introduces scheduled uplink transmission based on trigger frames.
  • the AP sends a trigger frame, and the trigger frame includes resource scheduling and other parameters for one or more STAs to send a high efficient trigger based PHY protocol data unit (HE TB PPDU).
  • HE TB PPDU high efficient trigger based PHY protocol data unit
  • the STA After the STA receives the trigger frame, it sends the HE TB PPDU on the resource unit (resource unit, RU) indicated by the trigger frame.
  • resource unit resource unit
  • Embodiments of the present application provide a bandwidth indication method, apparatus, and related equipment.
  • the bandwidth indication method realizes the indication of multiple bandwidth information when multiple TB PPDUs are aggregated and transmitted, which is beneficial for the access point to schedule three or more TB PPDUs sent at the same time, so as to better utilize the large bandwidth capability of the access point.
  • an embodiment of the present application provides a bandwidth indication method, and the method is executed by a site.
  • the station receives the indication information from the access point, and the indication information is used to indicate the bandwidth information of three or more trigger-based physical layer protocol data units TB PPDU.
  • the three or more TB PPDUs may be any combination of HE TB PPDUs, EHTTB PPDUs, or evolved EHTTB PPDUs.
  • the station determines the bandwidth information of the TB PPDU corresponding to the station, and sends the TB PPDU to the access point on the bandwidth of the TB PPDU corresponding to the station.
  • the bandwidth indication method realizes the indication of multiple bandwidth information when multiple TB PPDUs are aggregated and transmitted, which is beneficial for the access point to schedule three or more TB PPDUs sent at the same time, thereby facilitating the utilization of the large bandwidth capability of the access point.
  • the indication information is used to indicate the bandwidth information of the two TB PPDUs.
  • the two TB PPDUs are two HE TB PPDUs, or two EHTTB PPDUs, or two evolved EHTTB PPDUs, or one EHTTB PPDU and one evolved EHTTB PPDU. It can be seen that the indication information received by the station can also schedule two TB PPDUs of the same type, or schedule one EHTTB PPDU and one evolved EHTTB PPDU, thereby facilitating the utilization of the large bandwidth capability of the access point.
  • the number of indications is multiple.
  • the indication information is carried in the aggregation trigger frame.
  • the aggregate trigger frame includes multiple trigger frames, and one trigger frame carries one indication information. It can be seen that multiple pieces of bandwidth information can be carried in multiple different trigger frames, and the station can receive the corresponding bandwidth information on the pre-negotiated bandwidth resources.
  • the number of indications is multiple.
  • the indication information is carried in one trigger frame or multiple trigger frames. Multiple trigger frames are obtained by duplicating the same trigger frame in different frequency domains. It can be seen that multiple pieces of bandwidth information may be carried in one trigger frame, or multiple pieces of bandwidth information may be carried in multiple identical trigger frames.
  • the indication information is used to indicate at least one of the following information: bandwidth information of a TB PPDU, aggregated bandwidth information of a trigger-based aggregated physical layer protocol data unit TB A-PPDU, or a TB A-PPDU In the bandwidth combination information of each PPDU. It can be seen that the indication information can indicate the bandwidth information of multiple TB PPDUs in various ways.
  • the indication information is carried in at least one of the following fields of the trigger frame: a first field and a second field.
  • the first field is the upstream bandwidth field of the trigger frame, or the upstream bandwidth field and the upstream bandwidth extension field.
  • the second field is a reserved field of the trigger frame.
  • the reserved field of the trigger frame is any one of the following fields: the uplink efficient reserved field of the common information field, the reserved field of the common information field, the uplink general signaling reserved field of the special user information field, the special user information reserved field for the field.
  • some or all bits in at least one of the upstream bandwidth field and the upstream bandwidth extension field of the trigger frame are used to indicate at least one of the three kinds of bandwidth information described in the above possible design.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate at least one of the three kinds of bandwidth information described in the above possible design kind.
  • a trigger frame includes multiple special user fields, and one special user field is used to indicate the bandwidth of one TB PPDU.
  • the station generates a very high throughput long training EHT-LTF sequence based on the indication and sends the EHT-LTF sequence to the access point. It can be seen that the station generates different EHT-LTF sequences based on the bandwidth information of multiple TB PPDUs, which is conducive to optimizing the peak-to-average power ratio under different bandwidth conditions.
  • the station generates the EHT-LTF sequence based on one or more of the bandwidth information of the TB PPDU, the aggregated bandwidth information of the TBA-PPDU, or the bandwidth combination information of each PPDU in the TBA-PPDU.
  • the embodiment of the present application provides another bandwidth indication method, and the method is executed by an access point.
  • the access point generates indication information, where the indication information is used to indicate bandwidth information of three or more trigger-based physical layer protocol data units TB PPDUs.
  • the three or more TB PPDUs may be any combination of HE TB PPDUs, EHTTB PPDUs, or evolved EHTTB PPDUs.
  • the access point sends indication information to the station. It can be seen that the access point can use the indication information to schedule three or more TB PPDUs sent at the same time, so as to better utilize the large bandwidth capability of the access point.
  • the indication information is used to indicate the bandwidth information of the two TB PPDUs.
  • the two TB PPDUs are two HE TB PPDUs, or two EHTTB PPDUs, or two evolved EHTTB PPDUs, or one EHTTB PPDU and one evolved EHTTB PPDU.
  • the access point can also schedule two TB PPDUs of the same type through the indication information in this embodiment, or schedule one EHTTB PPDU and one evolved EHTTB PPDU, so as to better utilize the large bandwidth capability of the access point.
  • the number of indications is multiple.
  • the indication information is carried in the aggregation trigger frame.
  • the aggregate trigger frame includes multiple trigger frames, and one trigger frame carries one indication information. It can be seen that the access point can send multiple different trigger frames in different channel bandwidths.
  • the number of indications is multiple.
  • the indication information is carried in one trigger frame or multiple trigger frames. Multiple trigger frames are obtained by duplicating the same trigger frame in different frequency domains. It can be seen that the access point only sends one trigger frame, or the trigger frames sent by the access point are copied and transmitted in different channel bandwidths.
  • the indication information is used to indicate the bandwidth information of the TB PPDU, the aggregated bandwidth information of the trigger-based aggregate physical layer protocol data unit TB A-PPDU, or the bandwidth combination information of each PPDU in the TB A-PPDU. one or more. It can be seen that the indication information can indicate the bandwidth information of multiple TB PPDUs in various ways.
  • the indication information is carried in at least one of the following fields of the trigger frame: a first field and a second field.
  • the first field is the upstream bandwidth field of the trigger frame, or the upstream bandwidth field and the upstream bandwidth extension field.
  • the second field is a reserved field of the trigger frame.
  • the reserved field of the trigger frame is any one of the following fields: the uplink efficient reserved field of the common information field, the reserved field of the common information field, the uplink general signaling reserved field of the special user information field, the special user information reserved field for the field.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field of the trigger frame are used to indicate at least one of the three kinds of bandwidth information described in the above possible design.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate at least one of the three kinds of bandwidth information described in the above possible design kind.
  • a trigger frame includes multiple special user fields, and one special user field is used to indicate the bandwidth of one TB PPDU.
  • the access point determines an EHT-LTF sequence for channel estimation according to the indication information, and uses the corresponding EHT-LTF sequence to perform channel estimation.
  • an embodiment of the present application provides a bandwidth indication device.
  • the bandwidth indication device includes a transceiver unit and a processing unit.
  • the transceiver unit is used for receiving indication information from the access point.
  • the indication information is used to indicate the bandwidth information of three or more trigger-based physical layer protocol data units TB PPDUs.
  • three or more TB PPDUs include one of a high-efficiency trigger-based physical layer protocol data unit, an extremely high-throughput trigger-based physical layer protocol data unit, and an evolved extremely high-throughput trigger-based physical layer protocol data unit or more.
  • the processing unit is used to determine the bandwidth information of the TB PPDU corresponding to the site.
  • the transceiver unit is also used to send the TB PPDU to the access point on the bandwidth of the TB PPDU corresponding to the station.
  • the number of indications is multiple.
  • the indication information is carried in the aggregation trigger frame.
  • the aggregate trigger frame includes multiple trigger frames, and one trigger frame carries one indication information.
  • the number of indications is multiple.
  • the indication information is carried in one trigger frame or multiple trigger frames. Multiple trigger frames are obtained by duplicating the same trigger frame in different frequency domains.
  • the indication information is used to indicate the bandwidth information of three or more trigger-based physical layer protocol data units TB PPDU, including:
  • the indication information is used to indicate one or more of the bandwidth information of the TB PPDU, the aggregate bandwidth information of the trigger-based aggregate physical layer protocol data unit TBA-PPDU, or the bandwidth combination information of each PPDU in the TBA-PPDU.
  • the indication information is carried in at least one of the following fields of the trigger frame: a first field and a second field.
  • the first field is the upstream bandwidth field of the trigger frame, or the upstream bandwidth field and the upstream bandwidth extension field.
  • the second field is a reserved field of the trigger frame.
  • the reserved field of the trigger frame is any one of the following fields: the uplink efficient reserved field of the common information field, the reserved field of the common information field, the uplink general signaling reserved field of the special user information field, the special user information reserved field for the field.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field of the trigger frame are used to indicate at least one of the three kinds of bandwidth information described in the above possible design.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate at least one of the three kinds of bandwidth information described in the above possible design kind.
  • a trigger frame includes multiple special user fields, each of which is used to indicate the bandwidth of one TB PPDU.
  • the processing unit is also used to generate very high throughput long training EHT-LTF sequences based on the indication information.
  • the transceiver unit is also used to send the EHT-LTF sequence to the access point.
  • the processing unit is further configured to generate an EHT-LTF sequence based on the indication information, including:
  • the EHT-LTF sequence is generated.
  • an embodiment of the present application provides another bandwidth indication device.
  • the bandwidth indicating device includes a processing unit and a transceiver unit.
  • the processing unit is used for generating indication information.
  • the indication information is used to indicate the bandwidth information of three or more trigger-based physical layer protocol data units TB PPDUs.
  • Three or more TB PPDUs include one or more of Efficient Trigger-Based Physical Layer Protocol Data Units, Very High Throughput Trigger-Based Physical Layer Protocol Data Units, and Evolved Extremely High Throughput Trigger-Based Physical Layer Protocol Data Units. kind.
  • the transceiver unit is used to send indication information to the station.
  • the number of indications is multiple.
  • the indication information is carried in the aggregation trigger frame.
  • the aggregate trigger frame includes multiple trigger frames, and one trigger frame carries one indication information.
  • the number of indications is multiple.
  • the indication information is carried in one trigger frame or multiple trigger frames. Multiple trigger frames are obtained by duplicating the same trigger frame in different frequency domains.
  • the indication information is used to indicate the bandwidth information of three or more trigger-based physical layer protocol data units TB PPDU, including:
  • the indication information is used to indicate one or more of the bandwidth information of the TB PPDU, the aggregate bandwidth information of the trigger-based aggregate physical layer protocol data unit TBA-PPDU, or the bandwidth combination information of each PPDU in the TBA-PPDU.
  • the indication information is carried in at least one of the following fields of the trigger frame: a first field and a second field.
  • the first field is the upstream bandwidth field of the trigger frame, or the upstream bandwidth field and the upstream bandwidth extension field.
  • the second field is a reserved field of the trigger frame.
  • the reserved field of the trigger frame is any one of the following fields: the uplink efficient reserved field of the common information field, the reserved field of the common information field, the uplink general signaling reserved field of the special user information field, the special user information reserved field for the field.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field of the trigger frame are used to indicate at least one of the three kinds of bandwidth information described in the above possible design.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate at least one of the three kinds of bandwidth information described in the above possible design kind.
  • a trigger frame includes multiple special user fields, each of which is used to indicate the bandwidth of one TB PPDU.
  • the transceiver unit is also used to receive the EHT-LTF sequence from the station.
  • the processing unit is further configured to perform channel estimation according to the EHT-LTF sequence, where the EHT-LTF sequence is determined by the indication information.
  • an embodiment of the present application provides a site, and the device has a function of implementing the bandwidth indication method provided in the first aspect.
  • This function can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • an embodiment of the present application provides an access point, and the device has a function of implementing the bandwidth indication method provided in the second aspect.
  • This function can be implemented by hardware or by executing corresponding software by hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • this embodiment further provides a communication system, where the system includes the station according to the fifth aspect and the access point according to the sixth aspect.
  • an embodiment of the present application provides a computer-readable storage medium, where the readable storage medium includes a program or an instruction.
  • the program or instructions When the program or instructions are run on a computer, the computer is caused to perform the method of any of the possible implementations of the first or second aspect.
  • an embodiment of the present application provides a chip or a chip system, where the chip or chip system includes at least one processor and an interface.
  • the interface and the at least one processor are interconnected through a wire, and the at least one processor is configured to run a computer program or instructions to perform the method described in any one of the possible implementation manners of the first or second aspect.
  • the interface in the chip may be an input or output interface, a pin or a circuit, and the like.
  • the chip system in the above aspect may be a system on chip (system on chip, SOC), or a baseband chip or the like.
  • the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, and the like.
  • the chip or chip system described above in this application further includes at least one memory, where instructions are stored in the at least one memory.
  • the memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).
  • the embodiments of the present application provide a computer program or computer program product, including codes or instructions. Codes or instructions, when run on a computer, cause the computer to perform the method of any of the possible implementations of the first or second aspect.
  • Figure 1 is a schematic diagram of the trigger frame structure defined by 802.11ax;
  • FIG. 2 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • Fig. 3 is the schematic diagram of the channel division of 80MHz or 160MHz or 320MHz bandwidth in 6GHz frequency band;
  • Figure 4 is a schematic diagram of a trigger frame structure defined by 802.11be
  • FIG. 5 is a schematic flowchart of a bandwidth indication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a first aggregation trigger frame and an aggregation PPDU provided by an embodiment of the present application;
  • FIG. 7a is a schematic flowchart of a first kind of aggregation trigger frame and aggregation PPDU transmission between an AP and a STA according to an embodiment of the present application;
  • 7b is a schematic flowchart of a second type of aggregation trigger frame and aggregation PPDU transmission between an AP and a STA provided by an embodiment of the present application;
  • FIG. 8a is a schematic diagram of a second aggregation trigger frame and an aggregation PPDU provided by an embodiment of the present application;
  • 8b is a schematic diagram of a third aggregation trigger frame and an aggregation PPDU provided by an embodiment of the present application;
  • FIG. 9 is a schematic diagram of a fourth aggregation trigger frame and an aggregation PPDU provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of an improved trigger frame structure provided by an embodiment of the application.
  • FIG. 11 is a schematic diagram of a bandwidth indication device provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a site provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of another bandwidth indication device provided by an embodiment of the present application.
  • FIG. 14 is a schematic diagram of another access point provided by an embodiment of the present application.
  • words such as “exemplary” or “for example” are used to represent examples, illustrations or illustrations. Any embodiments or designs described in the embodiments of the present application as “exemplary” or “such as” should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as “exemplary” or “such as” is intended to present the related concepts in a specific manner.
  • the terms “second” and “first” are only used for description purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as “second” or “first” may expressly or implicitly include one or more of that feature.
  • the term “plurality” refers to two or three or more trigger frames, for example, a plurality of trigger frames refers to two or three or more trigger frames.
  • the size of the sequence number of each process does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, rather than the implementation of the embodiments of the present application
  • the process constitutes any qualification.
  • the protocol standard of wireless local area network starts from 802.11a, 802.11b, 802.11g, and goes through 802.11n, 802.11ac, 802.11ax to 802.11be under discussion.
  • the 802.11ax standard is called a high efficient (HE) version, and the maximum supported bandwidth of a PHY protocol data unit (PPDU) is 160 MHz.
  • the 802.11be standard is called an extremely high throughput (EHT) version, and the maximum supported PPDU bandwidth is 320MHz.
  • the standard after 802.11be can be called an evolved (future) very high throughput version, which is represented by EHT+, for example, referring to the 802.11bx standard and the 802.11cx standard.
  • EHT+ evolved very high throughput version
  • the evolution extremely high throughput rate in this application is based on the trigger-based physical layer protocol data unit EHT+TB PPDU corresponds to the trigger-based physical layer protocol data unit corresponding to the standard after 802.11be.
  • an access point (AP) and a station (station, STA) can select different physical layer protocol data unit (PHY protocol data unit, PPDU) bandwidths for transmission according to the channel conditions.
  • PHY protocol data unit PHY protocol data unit
  • PPDU physical layer protocol data unit
  • the STA performs uplink data transmission after obtaining the transmission right through channel competition.
  • the 802.11ax standard further introduces scheduled uplink transmission based on trigger frame (TF).
  • the AP sends a trigger frame, and the trigger frame includes resource scheduling and other parameters for one or more STAs to send a high efficient trigger based PHY protocol data unit (HE TB PPDU).
  • HE TB PPDU high efficient trigger based PHY protocol data unit
  • the STA After the STA receives the trigger frame, it sends the HE TB PPDU on the resource unit (resource unit, RU) indicated by the trigger frame.
  • the trigger frame includes a common information (commoninformation) field and a user information list (user informationlist) field.
  • the specific contents of the public information field and the user information field are shown in FIG. 1 .
  • the public information field contains public information that all STAs need to read.
  • the uplink bandwidth (uplink bandwidth) field in the common information field indicates the bandwidth of the HE TB PPDU triggered by the trigger frame.
  • the upstream bandwidth field is represented by two bits. Among them, 00 represents 20 megahertz (MHz), 01 represents 40MHz, 10 represents 80MHz, and 11 represents 160MHz or 80MHz+80MHz. Among them, 80MHz+80MHz represents the case where two 80MHz are discontinuous.
  • the user information list field includes one or more user information fields, and each user information field contains information that different STAs need to read respectively.
  • the association identification (association identification 12, AID12, representing the lower 12 bits of the AID) indicates the site identification of a certain STA.
  • the resource unit allocation (RU allocation) field is used to indicate the location of the resource unit allocated to the STA (that is, the STA indicated by AID12).
  • the STA parses the user information field matching its own AID from the trigger frame. Then, the STA sends the HE TB PPDU on the RU indicated by the resource unit allocation field in the user information field matching its own AID.
  • the names and functions of each field of the HE TB PPDU can be as shown in Table 1.
  • Table 1 List of fields in HE TB PPDU
  • the bandwidth field is used to indicate the bandwidth of the HE TB PPDU.
  • the bandwidth field is usually also represented by 2 bits, and its content and meaning are the same as the UL BW field in the trigger frame.
  • the above-mentioned transmission process between the AP and the STA only includes how the trigger frame indicates the bandwidth of one TB PPDU.
  • the trigger frame indicates the bandwidth of one TB PPDU.
  • multiple TB PPDUs also referred to as aggregate PPDUs (A-PPDUs, A-PPDUs)
  • A-PPDUs aggregate PPDUs
  • an embodiment of the present application provides a bandwidth indication method.
  • the bandwidth indication method realizes the indication of multiple bandwidth information when multiple TB PPDUs are aggregated and transmitted, which is beneficial for the access point to schedule three or more TB PPDUs sent at the same time, thereby facilitating the utilization of the large bandwidth capability of the access point.
  • the bandwidth indication method provided by the embodiment of the present application is applied to the communication system as shown in FIG. 2 .
  • the communication system includes APs and STAs.
  • the AP is the creator of a network and the central node of the network.
  • a wireless router used in a typical home or office is an AP.
  • the AP also includes equipment such as communication servers, switches, and bridges.
  • Each terminal such as a notebook computer, a personal digital assistant (PDA), a smart phone, and other user equipment that can be networked
  • PDA personal digital assistant
  • the communication system shown in FIG. 2 includes two APs and three STAs, which is only an example, and is not limited in this embodiment.
  • the bandwidth indication method provided in this embodiment of the present application is applicable to data communication between an AP and a STA (as shown in FIG. 2 , access point 1 and station 1), and is also applicable to an AP and an AP (as shown in FIG. 2 , between access point 1 and station 1).
  • the data communication between the ingress point 2) is also applicable to the data communication between the STA and the STA (such as the station 2 and the station 3 in FIG. 2).
  • the communication between the AP and the STA, between the AP and the AP, and between the STA and the STA may also be one-to-many communication.
  • the AP, STA1, STA2, and STA3 shown in FIG. 2 may all be one or more devices, which are not limited in this embodiment.
  • FIG. 3 is a schematic diagram of channel division of 80MHz or 160MHz or 320MHz bandwidth in the 6GHz frequency band.
  • UNII represents the unlicensed international information infrastructure radio frequency band (the unlicensed national information infrastructure radio band).
  • the STA may park on the channel position or frequency range shown in FIG. 3 , and receive indication information based on the parked channel position or frequency range.
  • 802.11be has designed two 320MHz channels in order to effectively utilize the channels.
  • the two 320MHz channels include: 320MHz-1 channel with center frequency of 31MHz or 95MHz or 159MHz, and 320MHz-2 channel with center frequency of 63MHz or 127MHz or 191MHz, as shown in Figure 3.
  • FIG. 4 is a schematic diagram of a frame structure of a trigger frame defined by 802.11be.
  • a special user information field in the user information list field of the trigger frame shown in FIG. 4 is used to carry the bandwidth information of the uplink EHT.
  • the special user information field does not carry user information.
  • the association identifier AID12 in the special user information field is an indication of the special user information field.
  • the uplink EHT bandwidth field of the special user information field in FIG. 4 is also called the uplink bandwidth extension field.
  • the upstream bandwidth extension field is used to indicate the bandwidth of the EHT TB PPDU in conjunction with the upstream bandwidth field in the common information field.
  • the upstream bandwidth field can also be used to indicate the bandwidth of the HE TB PPDU, as shown in Table 2.
  • the first column of Table 2 represents the upstream bandwidth field, which is represented by 2 bits.
  • the value in the first column is the value of the upstream bandwidth field.
  • the second column of Table 2 represents the bandwidth of the HE TB PPDU, and the bandwidth of the HE TB PPDU is indicated by 2 bits in the first column. That is, when the trigger frame is only used to schedule the HE TB PPDU, the STA determines the bandwidth of the HE TB PPDU according to the first column.
  • the values in Table 2 are in decimal.
  • the value in the second row and first column of Table 2 is 0 (2-bit binary representation is 00).
  • the 2 bits in the second row and the first column indicate that the bandwidth of the HE TB PPDU is 20MHz.
  • the value in the sixth row and first column of Table 2 is 1 (2-bit binary representation is 01).
  • the 2 bits in the sixth row and the first column indicate that the bandwidth of the HE TB PPDU is 40MHz.
  • the third column of Table 2 represents the upstream bandwidth extension field, which is also represented by 2 bits.
  • the value in the third column is the value of the upstream bandwidth extension field.
  • the fourth column of Table 2 represents the bandwidth of the EHT TB PPDU, and the bandwidth of the EHT TB PPDU is jointly indicated by 2 bits in the first column and 2 bits in the third column. That is, when the trigger frame is only used to schedule the EHT TB PPDU, the STA determines the bandwidth of the EHT TB PPDU according to the first and third columns. For example, the value in the first column of the second row of Table 2 is 0 (2-bit binary representation is 00), and the value in the second row and third column is 0 ((2-bit binary representation is 00)). The 2 bits in the second row and the first column and the 2 bits in the second row and the third column together indicate that the bandwidth of the EHT TB PPDU is 20MHz.
  • the special user information field also includes other fields as shown in FIG. 4 .
  • the AID12 association identifier is a special value 2007, which indicates that the field in the user information list is a special user information field.
  • the physical layer version identification field is used to indicate which generation of the trigger frame in the EHT or later standards is the trigger frame. For example, 0 for EHT, 1 for 11bx, 2 for 11cx, etc.
  • the uplink EHT spatial multiplexing 1 field and the uplink EHT spatial multiplexing 2 field are used to indicate the spatial multiplexing field in the universal signaling field (universal SIG, U-SIG) in the EHT PPDU.
  • the U-SIG reserved bits field is used to indicate reserved bits in the U-SIG.
  • the common information field also includes other fields as shown in FIG. 4 .
  • the upstream spatial multiplexing field is used to indicate the spatial multiplexing field in the HE-SIG-A in the HE PPDU.
  • the upstream HE-SIG-A2 reservation field is used to indicate the reserved bits in HE-SIG-A2 (the second symbol of HE-SIG-A) in the HE PPDU.
  • the upstream HE-SIG-A2 reserved field also redefines the HE or EHT indication bit (common field b54) and the special user information field existence indication bit (common field b55).
  • the HE or EHT indication bit is used to indicate whether the HE TB PPDU or the EHT TB PPDU is transmitted within the main 160MHz.
  • b54 indicates 1 indicates that the transmission in the main 160MHz is HE TB PPDU
  • b54 indicates 0 indicates that the transmission in the main 160MHz is EHT TB PPDU.
  • the special user information field existence indication bit is used to indicate whether the special user field exists.
  • b55 indicates that 1 indicates that it does not exist, and b55 indicates that 0 indicates that it exists. That is, the special user information field presence indication bit indirectly indicates whether the EHT TB PPDU is scheduled (because the special user information field also indicates common information required by the EHT TB PPDU).
  • b54 indicates 1, it means that the main 160MHz channel transmits HE TB PPDU. If b55 indicates 0, it indicates that there is a special user field, which indirectly indicates that the trigger frame also schedules EHT TB PPDU. Among them, the secondary 160MHz channel is used to transmit EHT TB PPDU.
  • Other user information fields in the user information list field (same length as the special user field, but carrying different subfields) carry individual information indications for each user, which will not be repeated here.
  • EHT TB PPDU Similar to HE TB PPDU, EHT TB PPDU also includes multiple fields, and the meaning of each field is shown in Table 3.
  • Table 3 List of field meanings in EHT TB PPDU
  • the bandwidth field also exists. That is, the AP indicates to the STA the bandwidth of the STA to send the TB PPDU, the STA sends the TB PPDU according to the indicated bandwidth, and carries the bandwidth information in the TB PPDU.
  • the bandwidth value of the TB PPDU carried in the bandwidth field of the U-SIG field in the EHT TB PPDU is the same as the bandwidth value of the PPDU indicated in the trigger frame.
  • the content of the U-SIG field in the EHT TB PPDU is shown in Table 4.
  • the bandwidth field of the U-SIG field directly indicates the bandwidth of the PPDU through 3 bits, and the trigger frame is jointly indicated through 2 bits+2 bits (eg, 2 bits of the upstream bandwidth field and 2 bits of the upstream bandwidth extension field shown in Table 2).
  • Table 4 List of contents of U-SIG field in EHT TB PPDU
  • the first two bits B0-B1 of the second symbol of the U-SIG field in the EHT TB PPDU shown in Table 4 are used to indicate the PPDU type and compression mode. Its specific meaning is shown in Table 5.
  • Table 5 List of Upstream or Downstream Fields and PPDU Type and Compressed Mode Fields of U-SIG Field in EHT TB PPDU
  • the 802.11be standard has two versions, the first version only involves some basic features, and the second version will further involve some other pending features.
  • the first version of the device is called the device that implements the basic characteristics of the EHT.
  • the device of the second version is called a device that does not implement the basic features of the EHT (it may also be referred to as a device that implements the advanced features of the EHT).
  • the device that implements the basic features of EHT has features such as supporting 320MHz channels and supporting multiple RUs, but does not support A-PPDU.
  • Devices that do not implement the basic features of EHT have features such as supporting A-PPDU and AP cooperation.
  • the reserved bits (also referred to as unused bits) of different fields in Table 4 are classified into two states, namely, Disregard and Validate. If a device implementing the basic features of EHT finds that the acknowledgment bit in a PPDU is not set to the default (default) value specified in the standard or that the values of some subfields are set to the acknowledgment state, the reception of the PPDU is terminated. For ignore bits, or subfields that are set to ignore state, if an EHT device does not find that the confirmation bit is not set to the default (default) value specified in the standard or the value of some subfields is set to the confirmation state , ignore the ignore bit, or ignore a subfield that is set to ignore state, and continue to read other fields.
  • FIG. 5 is a schematic flowchart of a bandwidth indication method provided by an embodiment of the present application.
  • the bandwidth indication method is implemented by the interaction between the access point and the station, and includes the following steps:
  • the access point generates indication information, where the indication information is used to indicate bandwidth information of multiple trigger-based physical layer protocol data units TB PPDUs;
  • the access point sends the indication information to the station; correspondingly, the station receives the indication information from the access point;
  • the station determines the bandwidth information of the TB PPDU corresponding to the station, and sends the TB PPDU to the access point on the bandwidth of the TB PPDU corresponding to the station.
  • the bandwidth information of the TB PPDU indicated by the AP to the STA indicates that the AP instructs the STA to send uplink data to the AP through the specified bandwidth. That is to say, the bandwidth information of the TB PPDU indicated by the AP to the STA includes the bandwidth indicated by the AP to the STA for transmitting the TB PPDU, and may also include information such as transmission resource units allocated by the STA.
  • the bandwidth used to transmit the TB PPDU can be understood as the transmission bandwidth or the working bandwidth of the TB PPDU.
  • the indication information sent by the AP to the STA is used to instruct the STA to send the bandwidth of the EHT TB PPDU, and to instruct the STA to specifically send the resource unit used for the EHT TB PPDU on the transmission bandwidth.
  • the indication information is used to indicate the bandwidth information of multiple TB PPDUs, including the following two situations:
  • the indication information is used to indicate the bandwidth information of two TB PPDUs.
  • the two TB PPDUs include any one of the following combinations: two HE TB PPDUs, two EHT TB PPDUs, two EHT+TB PPDUs, one EHT PB PPDU, and one EHT+TB PPDU.
  • Case 2 The indication information is used to indicate the bandwidth information of three or more TB PPDUs.
  • three or more TB PPDUs include one or more of HE TB PPDU, EHT TB PPDU, and EHT+TB PPDU.
  • the indication information can indicate any combination of TB PPDUs in case 1 or case 2, the indication information in this embodiment is used to indicate at least one of the following information: bandwidth information of the TB PPDU, trigger-based aggregation mechanism Aggregated bandwidth information of the trigger based aggregate PHY protocol data unit (TB A-PPDU) or the bandwidth combination of each PPDU in the T A-PPDU.
  • the indication information is carried in the trigger frame. That is to say, the generation of the indication information by the access point also means that the access point generates a trigger frame, and the trigger frame carries the indication information.
  • the indication information is used to indicate the bandwidth information of the TB PPDU.
  • AP1 in FIG. 2 generates a trigger frame and sends the trigger frame to STA1.
  • the indication information carried in the trigger frame is used to indicate the bandwidth of the STA1 to send the TB PPDU to the AP1. That is, the indication information is used to indicate the bandwidth information of a single PPDU.
  • the trigger frame may also indicate the resource unit used by the STA to send the TB PPDU, which will not be repeated here.
  • the indication information is used to indicate aggregated bandwidth information based on the TBA-PPDU.
  • AP1 in FIG. 2 generates a trigger frame and sends the trigger frame to STA1 and STA2.
  • the indication information carried in the trigger frame is used to instruct STA1 and STA2 to send the aggregated bandwidth of the TB PPDU to AP1 respectively.
  • the indication information is used to indicate the bandwidth combination information of each PPDU in the TBA-PPDU.
  • AP1 in FIG. 2 generates a trigger frame and sends the trigger frame to STA1 and STA2.
  • the indication information carried in the trigger frame is used to indicate how much bandwidth STA1 and STA2 occupy respectively to send the TB PPDU to AP1. That is to say, the indication information carried in the trigger frame respectively indicates the corresponding transmission bandwidths of STA1 and STA2 for sending TB PPDUs.
  • the number of indication information is multiple, and the indication information is carried in the aggregation trigger frame.
  • the aggregation trigger frame includes multiple trigger frames, and one trigger frame carries one piece of indication information.
  • the indication information is carried in the aggregation trigger frame.
  • the aggregation trigger frame includes two trigger frames (such as trigger frame 1 and trigger frame 2 in FIG. 6 ), and the two trigger frames respectively indicate bandwidth information of two HE TB PPDUs, as shown in FIG. 6 .
  • the STA sends the TB PPDU 1 on the corresponding bandwidth according to the bandwidth information of the HE TB PPDU1 indicated by the trigger frame 1.
  • the STA sends the TB PPDU 2 on the corresponding bandwidth according to the bandwidth information of the HE TB PPDU 2 indicated by the trigger frame 2.
  • the STA receives the indication information on the docked channel position or frequency range, and the docked channel position or frequency range is negotiated in advance by the AP and the STA.
  • the STA obtains the bandwidth of the TB PPDU indicated by the AP to the STA by relying on the location or frequency range of the 80MHz sub-block (80MHz sub-block) it stops at.
  • STA1 and STA2 in Fig. 2 are docked on the first and second 80MHz channels of UNII 5 as shown in Fig. 3, respectively.
  • AP1 in FIG. 2 sends an aggregation trigger frame, and the aggregation trigger frame includes trigger frame 1 and trigger frame 2 .
  • trigger frame 1 and trigger frame 2 are located on the first and second 80MHz channels in UNII5, respectively.
  • STA1 receives trigger frame 1, and the bandwidth indication information carried by trigger frame 1 indicates that the bandwidth of the TB PPDU of STA1 is 80MHz.
  • STA1 sends TB PPDU 1 with a bandwidth of 80MHz on the first 80MHz channel it docks.
  • STA2 receives trigger frame 2, and the bandwidth indication information carried by trigger frame 2 indicates that the bandwidth of the TB PPDU of STA2 is 80MHz. STA2 sends TB PPDU 2 with a bandwidth of 80MHz on the second 80MHz channel it docks.
  • STA1 in FIG. 2 is a plurality of devices (it is assumed to be three STA1).
  • the three STA1s are docked on the first, second and fourth 80MHz channels in UNII-5, respectively.
  • AP1 sends an aggregation trigger frame, and the aggregation trigger frame includes trigger frames 1-3.
  • trigger frame 1 and trigger frame 2 are located on the first and second 80MHz channels in UNII-5, respectively.
  • Trigger frame 3 is on the 160MHz channel consisting of the third and fourth 80MHz. Alternatively, trigger frame 3 is replicated on the third and fourth 80MHz channels in UNII-5.
  • the first STA1 receives the trigger frame 1, and the bandwidth indication information carried by the trigger frame 1 indicates that the bandwidth of the TB PPDU is 80MHz.
  • the first STA1 has the ability to send TB PPDU with a bandwidth of 80MHz, and the first STA1 sends a TB PPDU 1 with a bandwidth of 80MHz on the first 80MHz channel it docks.
  • the second STA1 receives the trigger frame 2, and the bandwidth indication information carried by the trigger frame 2 indicates that the bandwidth of the TB PPDU is 80MHz.
  • the second STA1 has the ability to send TB PPDUs with a bandwidth of 80MHz, and the second STA1 sends TB PPDUs 2 with a bandwidth of 80MHz on the second 80MHz channel that is docked.
  • the third STA1 receives the trigger frame 3, and the bandwidth indication information carried by the trigger frame 3 indicates that the bandwidth of the TB PPDU is 160MHz.
  • the third STA1 has the ability to send TB PPDU with a bandwidth of 160MHz, and the third STA1 sends a TB PPDU 3 with a bandwidth of 160MHz on the docked 160MHz channel. It can be understood that, since the third STA1 is docked on the fourth 80MHz channel, and the third STA1 receives the bandwidth indication information carried by the trigger frame 3 to indicate that the bandwidth of the TB PPDU is 160MHz, the third STA1 also has a transmission bandwidth of 160MHz. 160MHz TB PPDU capability. Based on this, docking on the fourth 80MHz channel can be regarded as docking on the 160MHz channel, so the third STA1 can send TB PPDU 3 with a bandwidth of 160MHz on the docked 160MHz channel.
  • the transmission process between the AP and the STA is shown in Figure 7a.
  • the combination of the TB PPDU in the first case shown in FIG. 7a is a combination of two EHT TB PPDUs.
  • Figure 7a includes the format of the EHT TB PPDU.
  • the EHT TB PPDU includes multiple fields, and the meaning of each field is shown in Table 3.
  • the trigger frame is used to schedule the combination of TB PPDUs in case 2
  • the transmission flow between the AP and the STA is shown in Figure 7b.
  • FIG. 7b is a combination of two HE TB PPDUs and one EHT TB PPDU.
  • Figure 7b includes the formats of HE TB PPDU and EHT TB PPDU.
  • the HE TB PPDU includes multiple fields, and the meaning of each field is shown in Table 1.
  • the EHT TB PPDU also includes multiple fields, and the meaning of each field is shown in Table 3.
  • the AP when the AP schedules the combination of TB PPDUs described in case 1 or case 2 by the trigger frame, the AP can generate an aggregation trigger frame, and the aggregation trigger frame is used to indicate the bandwidth information of multiple TB A-PPDUs.
  • AP1 in FIG. 7a generates an aggregation trigger frame, and the aggregation trigger frame is used to instruct STA1 to send the bandwidth of TB PPDU 1, and to instruct STA2 to send the bandwidth of TB PPDU 2.
  • AP1 in Figure 7b generates an aggregation trigger frame, which is used to instruct STA1 to send the bandwidth of TB PPDU 1, STA2 to send the bandwidth of TB PPDU 2, and STA3 to send the bandwidth of TB PPDU 3.
  • the aggregation trigger frame may also instruct the STA to send the resource unit of the TB PPDU, which will not be repeated here.
  • the structures of the aggregation trigger frame and the A-PPDU shown in FIG. 7a are shown in FIG. 8a.
  • the structure of the aggregation trigger frame and the A-PPDU shown in Fig. 7b is shown in Fig. 8b. It can be seen that the aggregation trigger frame can indicate the information of the aggregation PPDU.
  • the AP sends an aggregation trigger frame to multiple STAs.
  • multiple STAs receive aggregation trigger frames respectively.
  • STA1 acquires the indication information for STA1 in the aggregation trigger frame, where the indication information is used to instruct STA1 to send EHT TB PPDU 1 on the specified bandwidth 1.
  • STA2 obtains the indication information for STA2 in the aggregation trigger frame, where the indication information is used to instruct STA2 to send EHT TB PPDU2 on the specified bandwidth 2.
  • how to carry the bandwidth indication information in the trigger frame may include the following implementation manners:
  • the bandwidth information is indicated by at least one of an uplink bandwidth field and an uplink bandwidth extension field. Further, the bandwidth information is indicated by some or all bits of the upstream bandwidth field. Alternatively, the bandwidth information is indicated by some or all bits of the upstream bandwidth field and the upstream bandwidth extension field.
  • the bandwidth information is indicated by at least one of the following fields: the uplink efficient reservation field of the common information field, the reserved field of the common information field, the uplink general signaling reservation field of the special user information field, the special Reserved fields for user information fields.
  • the bandwidth information is indicated by some or all bits of the above reserved field. Specifically, the indication information is indicated by some or all of the following bits:
  • b56-b62 ie, the last 7 bits of the upstream HE-SIG-A2 reserved field
  • b63 ie, the reserved bits of the reserved field
  • b25-b36 that is, all the bits of the reserved indication in the uplink U-SIG field
  • b37-b39 that is, the reserved bits of the reserved field
  • reserved bits described in this embodiment are bits not used in the standard for the time being. If the above reserved bits are used to indicate bandwidth information, the used reserved bits will no longer be called reserved bits.
  • the bandwidth information indication in the trigger frame may indicate at least one of the following information: bandwidth information of TB PPDU , the aggregated bandwidth information of the TBA-PPDU or the bandwidth combination of each PPDU in the TBA-PPDU.
  • bandwidth information of TB PPDU bandwidth information of TB PPDU
  • the aggregated bandwidth information of the TBA-PPDU bandwidth combination of each PPDU in the TBA-PPDU.
  • some or all bits of at least one of the uplink bandwidth field and the uplink bandwidth extension field indicate the bandwidth of each TB PPDU.
  • the upstream bandwidth field and upstream bandwidth extension field of trigger frame 1 in Figure 8a are used to indicate the bandwidth information of TB PPDU 1 of STA1
  • the upstream bandwidth field and upstream bandwidth extension field of trigger frame 2 are used to indicate TB PPDU 2 of STA2 bandwidth information.
  • STA1 receives trigger frame 1 in the aggregation trigger frame on the docked 80MHz channel.
  • STA1 determines that the bandwidth for STA1 to transmit the EHT TB PPDU is 80MHz according to the value of the uplink bandwidth field in trigger frame 1 (for example, the value is 2) and the value of the uplink bandwidth extension field (for example, the value is 0).
  • STA2 receives trigger frame 2 in the aggregation trigger frame on the docked 80MHz channel.
  • STA2 determines that the bandwidth for STA2 to transmit EHT TB PPDU is 80MHz according to the value of the uplink bandwidth field in trigger frame 2 (for example, the value is 2) and the value of the uplink bandwidth extension field (for example, the value is 0).
  • the aggregation trigger frame (including three trigger frames TF1, TF2 and TF3) in FIG. 8b uses the upstream bandwidth field for bandwidth indication, or uses the upstream bandwidth field and the upstream bandwidth extension field for bandwidth indication, as shown in Table 6.
  • the uplink bandwidth field is indicated by 2 bits
  • the uplink bandwidth extension field is indicated by 2 bits, which is similar to Table 2.
  • it may further include an identifier of the trigger frame, where the identifier of the trigger frame is associated with the uplink bandwidth field and the uplink bandwidth extension field of the trigger frame.
  • Table 6 also includes a description of the bandwidth combinations indicated by the upstream bandwidth field and the upstream bandwidth extension field.
  • each site can determine the bandwidth for sending the TB PPDU respectively.
  • STA1 receives the aggregation trigger frame on the docked 160MHz channel, and acquires the trigger frame 1 corresponding to STA1 from the aggregation trigger frame.
  • STA1 obtains various bandwidth information indicated by TF1 from Table 6 according to the identifier of trigger frame 1.
  • STA1 determines that the bandwidth for STA1 to transmit the HE TB PPDU is 160 MHz according to the value of the uplink bandwidth field of TF1 (for example, the value is 3).
  • STA2 and STA3 also use the above method to determine the bandwidth for transmitting the TB PPDU, which will not be repeated here.
  • the trigger frame sent by the AP to the STA only includes the uplink bandwidth field.
  • APs and STAs may also store Table 6 in advance. After the STA obtains the trigger frame, it can obtain the bandwidth indicated by the trigger frame by querying Table 6.
  • the row indicating that the bandwidth is 20MHz or 40MHz in Table 6 may also add the trigger frame identifier.
  • the trigger frame is used to indicate that the bandwidth of a single TB PPDU is 20MHz.
  • Row 2 to row 5 of Table 6 may be added with an identifier of the trigger frame.
  • the bandwidth indicated by the uplink bandwidth field and the uplink bandwidth extension field in Table 6 may include the following situations:
  • Example 1 When the bit value of the upstream bandwidth field in the trigger frame is 0 and the bit value of the upstream bandwidth extension field is 0, the trigger frame is used to indicate that there is only HE TB PPDU, and the bandwidth of the HE TB PPDU is 20MHz. Alternatively, the trigger frame is used to indicate that there is only EHT TB PPDU, and the bandwidth of the EHT TB PPDU is 20MHz.
  • Example 2 When the bit value of the upstream bandwidth field in the trigger frame is 1 and the bit value of the upstream bandwidth extension field is 0, the trigger frame is used to indicate that there is only HE TB PPDU, and the bandwidth of the HE TB PPDU is 40MHz. Alternatively, the trigger frame is used to indicate that there is only EHT TB PPDU, and the bandwidth of the EHT TB PPDU is 40MHz.
  • Example 3 When the bit value of the upstream bandwidth field in the trigger frame is 2 and the bit value of the upstream bandwidth extension field is 0, the trigger frame is used to indicate that there is only HE TB PPDU, and the bandwidth of the HE TB PPDU is 80MHz. Alternatively, the trigger frame is used to indicate that there is only EHT TB PPDU, and the bandwidth of the EHT TB PPDU is 80MHz.
  • Example 4 When the bit value of the upstream bandwidth field in the trigger frame is 2 and the bit value of the upstream bandwidth extension field is 1, the trigger frame is used to indicate the HE TB PPDU and the EHT TB PPDU.
  • the bandwidth of HE TB PPDU is 80MHz, and the bandwidth of EHT TB PPDU is 160MHz.
  • Example 5 When the bit value of the upstream bandwidth field in the trigger frame is 3 and the bit value of the upstream bandwidth extension field is 0, the trigger frame is used to indicate the HE TB PPDU and the EHT TB PPDU.
  • the bandwidth of HE TB PPDU is 160MHz, and the bandwidth of EHT TB PPDU is 80MHz.
  • Example 6 When the bit value of the upstream bandwidth field in the trigger frame is 3 and the bit value of the upstream bandwidth extension field is 1, the trigger frame is used to indicate that there is only HE TB PPDU, and the bandwidth of the HE TB PPDU is 160MHz. Alternatively, the trigger frame is used to indicate that there is only EHT TB PPDU, and the bandwidth of the EHT TB PPDU is 160MHz. Alternatively, the trigger frame is used to indicate the HE TB PPDU and the EHT TB PPDU, the bandwidth of the HE TB PPDU is 160 MHz, and the bandwidth of the EHT TB PPDU is 160 MHz.
  • Example 7 When the bit value of the upstream bandwidth field in the trigger frame is 3 and the bit value of the upstream bandwidth extension field is 2, the trigger frame is used to indicate that there is only EHT TB PPDU, and the bandwidth of the EHT TB PPDU is 320MHz-1.
  • Example 8 When the bit value of the upstream bandwidth field in the trigger frame is 3 and the bit value of the upstream bandwidth extension field is 3, the trigger frame is used to indicate that there is only EHT TB PPDU, and the bandwidth of the EHT TB PPDU is 320MHz-2.
  • the above examples 1-8 are only an example and not a limitation.
  • the bit value of the uplink bandwidth field and the bit value of the uplink bandwidth extension field in the trigger frame are corresponding values, the specified combination of TB PPDUs. And the bandwidth is interchangeable.
  • the trigger frame can be used to indicate that there is only an EHT TB PPDU, and the bandwidth of the EHT TB PPDU is 320MHz-1.
  • some or all bits of at least one of the uplink bandwidth field and the uplink bandwidth extension field in the trigger frame are used to indicate aggregate bandwidth information based on the TBA-PPDU.
  • the aggregate bandwidth of the HE TB PPDU only needs 2 bits to indicate.
  • a 2bit value (a decimal value) of 0 indicates 160MHz
  • a 2bit value of 1 indicates 320MHz-1
  • a 2bit value of 2 indicates 320MHz-2.
  • the PPDU bandwidth only needs 1 bit to indicate.
  • the aggregate trigger frame shown in Figure 8a includes trigger frame 1 and trigger frame 2.
  • the upstream bandwidth field and upstream bandwidth extension field of trigger frame 1 indicate that the aggregated bandwidth is 160 MHz.
  • STA1 receives trigger frame 1 in the aggregation trigger frame on the docked 80MHz channel, and determines that the aggregated bandwidth is 160MHz according to the value of the uplink bandwidth field and the value of the uplink bandwidth extension field in trigger frame 1. Further, STA1 determines, according to the resource unit field in trigger frame 1, that the bandwidth for STA1 to transmit the EHT TB PPDU is the 80MHz bandwidth of the designated channel position in the 160MHz aggregated bandwidth.
  • STA2 receives trigger frame 2 in the aggregation trigger frame on the docked 80MHz bandwidth, and determines that the aggregate bandwidth is 160MHz according to the value of the uplink bandwidth field and the value of the uplink bandwidth extension field in trigger frame 2. Further, STA2 determines, according to the RU indicated by trigger frame 2, that the bandwidth for STA2 to transmit the EHT TB PPDU is the 80MHz bandwidth of the designated channel position in the 160MHz aggregated bandwidth.
  • the common information field and the special user information field in the trigger frame are also used to indicate other information (such as a physical layer version identifier, etc.) in the aggregated bandwidth information other than the aggregated bandwidth.
  • b54 of the common information field of each trigger frame is used to indicate whether the TB PPDU is a HE TB PPDU. If b54 indicates 1, the TB PPDU is an HE TB PPDU; if b54 indicates 0, the TB PPDU is an EHT PPDU.
  • b54 indicates that the transmission in the main 160MHz can be any one of HE TB PPDU, EHT TB PPDU, and EHT+TB PPDU.
  • b55 of the common information field is used to indicate whether there is a special user field.
  • other reserved bits in the common information field are also used to respectively indicate the type of each TB PPDU, or respectively indicate which type of PPDU each PPDU transmitted with a bandwidth of 80 MHz is.
  • EHT TB PPDU and EHT+TB PPDU can be regarded as the same type of PPDU, and can be further distinguished by the physical layer version identifier.
  • the EHT TB PPDU indicating transmission is EHT TB PPDU, EHT+TB PPDU, EHT++TB PPDU, etc. (here is just an example of a standard version, and the specific labels and representations are not limited in this embodiment).
  • the target STA performs bandwidth indication in the U-SIG of the sent EHTTB PPDU or EHT+TB PPDU according to the bandwidth indicated by the trigger frame.
  • a device that does not implement the basic features of the EHT can learn the aggregated bandwidth of the TBA-PPDU.
  • Devices that do not implement the basic features of EHT can optimize the spatial multiplexing operation for TB A-PPDUs. It is beneficial to perform spatial multiplexing transmission on devices that do not implement the basic characteristics of EHT, or prevent interference to current transmission.
  • some or all bits of at least one of the uplink bandwidth field and the uplink bandwidth extension field in the trigger frame are used to indicate bandwidth combination information of each PPDU in the TBA-PPDU.
  • the upstream bandwidth field and the upstream bandwidth extension field (4 bits in total) of the aggregation trigger frame can indicate up to 16 bandwidth combinations.
  • the five bandwidth combinations shown in Table 7 are indicated, only 3 bits in the upstream bandwidth field and the upstream bandwidth extension field need to be used.
  • the bit value converted into decimal value can be used as the identifier of the bandwidth combination.
  • the identifier of the bandwidth combination indicated by the aggregation trigger frame is 0, that is, the indicated bandwidth combination is 80MHz-80MHz -80MHz-80MHz.
  • this embodiment can implement several bandwidth combinations as shown in Table 7.
  • the bandwidth combinations shown in Table 7 are divided into multiple bandwidth combinations with 80 MHz as the granularity, and other bandwidths (such as smaller bandwidths such as 40 MHz) may also be used as the granularity, which is not limited in this embodiment.
  • the trigger frame when the trigger frame is used to indicate the bandwidth combination information of each PPDU in the TBA-PPDU, the trigger frame may not carry the bandwidth of a single PPDU, or the aggregated bandwidth, or the bandwidth of a single PPDU and the aggregated bandwidth.
  • the STA can determine the bandwidth of the STA to send the TB PPDU by using the PPDU bandwidth combination information and the position of the channel where it stops in the entire aggregated bandwidth.
  • the bandwidth combination indicated by the aggregation trigger frame is 80MHz-80MHz-160MHz.
  • STA1 is located on the second 80MHz from low to high frequency, then STA1 determines that the PPDU bandwidth is 80MHz according to the combination of the channel on which it is docked and the bandwidth indicated by the trigger frame. If STA1 is located on the third or fourth 80MHz from low to high frequency, the PPDU bandwidth is determined to be 80MHz or 160MHz.
  • the indication information may further include aggregated bandwidth information, and a specific bandwidth indication is obtained by combining the bandwidth combination information and the aggregated bandwidth information.
  • a specific bandwidth indication is obtained by combining the bandwidth combination information and the aggregated bandwidth information.
  • the trigger frame may only indicate that the aggregated bandwidth is 160MHz without further indicating the bandwidth combination, and the specific bandwidth combination may also be determined to be 80M-80M.
  • the aggregated bandwidth is 320 MHz
  • the identifier of the bandwidth combination indicated by the trigger frame is any one of 0-3.
  • Table 7 List of Bandwidth Combinations of TB A-PPDUs
  • this indication mode can support the most flexible combination.
  • Table 7 includes five flexible bandwidth combinations. Bandwidth combinations also show the aggregated bandwidth of TB A-PPDUs, and the bandwidth of individual TB PPDUs, which contain the largest amount of information.
  • the bandwidth information indication in the trigger frame may indicate at least one of the following information: bandwidth information of TB PPDU, aggregate bandwidth information of TBA-PPDU, or bandwidth combination of each PPDU in TBA-PPDU.
  • some or all of the reserved bits in at least one of the common information field and the special user information field in the trigger frame are used to indicate the bandwidth of each TB PPDU.
  • the aggregation trigger frame includes multiple trigger frames, and each trigger frame has its own common information field and special user field, which respectively indicate the PPDU bandwidth of the corresponding site.
  • b56 and b57 in the common information fields b56-b62 of each trigger frame in the aggregate trigger frame are used to indicate the bandwidth information of the TB PPDU.
  • the value of b56 and b57 is 0 to indicate 80MHz, the value of 1 to indicate 160MHz, and the value of 2 to indicate 320MHz.
  • the STA receives the corresponding trigger frame, and reads the values of b56 and b57 in the public information field of the corresponding trigger frame, thereby obtaining the bandwidth for transmitting TB PPDUs indicated by the AP to the STA.
  • some or all of the reserved bits in at least one of the common information field and the special user information field in the trigger frame are used to indicate aggregated bandwidth information based on the TBA-PPDU.
  • the values of the two bits b37 and b38 may be used to indicate the aggregated bandwidth.
  • the value of b37 and b38 is 0, indicating that the aggregated bandwidth is 160 MHz, and the value of 1 indicates that the aggregated bandwidth is 320 MHz.
  • the value of b37 and b38 is 00 (the default value), which means that it is not A-PPDU, the value of b37 and b38 is 01, which means that the aggregated bandwidth is 160MHz, and the value of b37 and b38 is 10, which means that the aggregated bandwidth is 320MHz.
  • the value of b37 and b38 is 11 for reservation. It should be noted that the meanings corresponding to the above values are only examples, and the meanings corresponding to different values can be interchanged, which is not limited in this application.
  • some or all of the reserved bits in at least one of the common information field and the special user information field in the trigger frame are used to indicate bandwidth combination information of each PPDU in the TBA-PPDU.
  • the bandwidth combination indicated by b37-b39 is 160MHz-80MHz -80MHz.
  • the bandwidth combination information of each PPDU in the TBA-PPDU can refer to Table 7, and details are not repeated here.
  • the bandwidth information may also be indicated in combination with at least one of the uplink bandwidth field and the uplink bandwidth extension field, and at least one of the common information field and the special user information field.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field of the trigger frame indicate a kind of bandwidth information
  • some or all bits of reserved bits of at least one of the common information field and the special user information field indicate Another kind of bandwidth information.
  • some or all bits of at least one of the uplink bandwidth field and the uplink bandwidth extension field of the trigger frame are used to indicate the bandwidth of the TB PPDU, and at least one field of the common information field and the special user information field.
  • Some or all of the reserved bits are used to indicate the aggregated bandwidth of the A-PPDU.
  • some or all of the bits in the uplink HE-SIG-A2 field in the common information field of the trigger frame are reserved for indicating the aggregated bandwidth.
  • the value of the reserved bit is 0 to indicate that the aggregated bandwidth is 160MHz, and the value of 1 indicates that the aggregated bandwidth is 320MHz.
  • the default state in the reserved field of the trigger frame is used to represent a single PPDU, ie a non-A-PPDU case.
  • the default value (reserved value) of the reserved bit of the uplink HE-SIG-A2 in the common information field of the trigger frame is 1.
  • the default value of the two reserved bits is 11 indicating the non-A-PPDU indicated by the trigger frame, 00 indicating that the aggregate bandwidth indicated by the trigger frame is 160MHz, 01 indicating that the aggregate bandwidth indicated by the trigger frame is 320MHz, and 10 being reserved.
  • the specific bandwidth information indicated by the fields in this implementation manner may exchange locations.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field of the trigger frame may be used to indicate the aggregated bandwidth of the A-PPDU, while the pre-defined bandwidth of at least one of the common information field and the special user information field Some or all of the bits are reserved for indicating the bandwidth of the TB PPDU.
  • some or all of the bits of the upstream bandwidth field of the trigger frame are used to indicate the aggregated bandwidth of the A-PPDU, and some or all of the reserved bits of the trigger frame are used to indicate the bandwidth of the TB PPDU.
  • some or all bits of at least one field in the uplink bandwidth field and the uplink bandwidth extension field of the trigger frame are used to indicate the bandwidth combination information of each PPDU in the TB A-PPDU, the common information field and the special user information field.
  • Some or all of the reserved bits of at least one field in the TB PPDU are used to indicate the bandwidth of the TB PPDU.
  • the specific bandwidth information indicated by the fields in this implementation manner may also exchange locations.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field of the trigger frame can be used to indicate the bandwidth of the TB PPDU, while the reserved bits of at least one of the common information field and the special user information field Some or all of the bits are used to indicate the bandwidth combination information of each PPDU in the TBA-PPDU.
  • some or all bits of at least one of the uplink bandwidth field and the uplink bandwidth extension field of the trigger frame are used to indicate the aggregated bandwidth of the A-PPDU, and the bits of at least one of the common information field and the special user information field are used to indicate the aggregated bandwidth of the A-PPDU.
  • Some or all of the reserved bits are used to indicate the bandwidth combination information of each PPDU in the TBA-PPDU.
  • the specific bandwidth information indicated by the fields in this implementation manner may also exchange locations.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field of the trigger frame can be used to indicate the bandwidth combination information of each PPDU in the TBA-PPDU, while the common information field and the special user information field Some or all of the reserved bits of at least one field are used to indicate the aggregated bandwidth of the A-PPDU.
  • the number of indication information is multiple, and the indication information is carried in one trigger frame or multiple trigger frames.
  • the multiple trigger frames are obtained by duplicating the same trigger frame in different frequency domain ranges.
  • the trigger frame indicating the bandwidth of the TB A-PPDU is divided into two cases: there is only one trigger frame, or the same trigger frame is duplicated and transmitted in different frequency domains in the bandwidth of the TB A-PPDU.
  • FIG. 9 is a schematic diagram of duplicate transmission of the same trigger frame in different 80 MHz according to an embodiment of the present application. Among them, the multiple trigger frames in FIG. 9 are obtained by duplicating the same trigger frame in four 80MHz equally divided in the whole 320MHz, that is, the contents of trigger frames 1-4 are the same.
  • the bandwidths of the TB PPDUs indicated by the trigger frames 1-4 are also the same, as shown in FIG. 9 .
  • This example is applicable to the scenario where the bandwidth of the trigger frame is duplicated in the TB A-PPDU.
  • this example applies to scenarios where non-high-throughput PPDUs of the 802.11 standard require replication over the entire bandwidth.
  • non-high-throughput PPDUs can provide better protection of transmission opportunities and reduce interference.
  • this example also includes a scenario where only one trigger frame is transmitted in the entire bandwidth, and this trigger frame can also indicate aggregated TB PPDUs.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field in the trigger frame are used to indicate the bandwidth of each TB PPDU.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate the bandwidth of each TB PPDU.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field in the trigger frame are used to indicate aggregate bandwidth information based on the TBA-PPDU.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate aggregated bandwidth information based on the TBA-PPDU.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field in the trigger frame are used to indicate the bandwidth combination based on the TBA-PPDU.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate the bandwidth combination based on the TBA-PPDU.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field of the trigger frame are used to indicate the aggregated bandwidth information based on the TBA-PPDU, and the common information field and special Some or all of the reserved bits in at least one field of the user information field are used to indicate bandwidth information of each TB PPDU. For example, if the entire bandwidth 320MHz is divided with 80MHz as the granularity, the TB PPDU in the TB A-PPDU can have two bandwidths of 80MHz or 160MHz.
  • some bits of reserved bits in at least one field of the common information field and the special user information field of the trigger frame (for example, as shown in Figure 6 ) 4 bits in the uplink U-SIG reserved bits b25-b36 of the special user information field) are used to indicate the bandwidth of each TB PPDU.
  • 3 bits in the reserved bits of the trigger frame are used to indicate the bandwidth of each TB PPDU (the bandwidth of the last TB PPDU is equal to the aggregate bandwidth minus the bandwidth indicated by the previous ones).
  • the STA determines the required bandwidth by summing the bandwidths of each TB PPDU. Whether the value of the sum is equal to the aggregated bandwidth of the TB A-PPDU, thereby determining the number of TB PPDUs. For example, if the aggregated bandwidth indicated by the trigger frame is 320 MHz, the bandwidth of TB PPDU1 is 160 MHz, and the bandwidth of TB PPDU2 is 160 MHz, the STA determines that there are 2 TB PPDUs in the entire bandwidth.
  • the aggregate bandwidth indicated by the trigger frame is 320MHz
  • the bandwidth of TB PPDU1 is 160MHz
  • the bandwidth of TB PPDU2 is 80MHz
  • the bandwidth of TB PPDU3 is 80MHz
  • the STA determines that there are 3 PPDUs in the entire bandwidth.
  • the number of bits required for each TB PPDU bandwidth indication and the relative order of each entry are not limited in this embodiment.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate the number of TB PPDUs.
  • 2 bits in the reserved bits of the trigger frame are used to indicate the number of TB PPDUs.
  • the default value (value 0) represents 1, and other values (value 1, 2, 3) represent 2-4.
  • values are only examples and are not intended to be limiting.
  • some or all bits of at least one of the upstream bandwidth field and the upstream bandwidth extension field of the trigger frame are used to indicate the aggregated bandwidth of the A-PPDU, and the common information field and the special user information field of the trigger frame.
  • Some or all of the reserved bits in at least one field are used to indicate the identification of the bandwidth combination of each PPDU in the TBA-PPDU.
  • both the AP and the STA obtain the bandwidth combination of the TB A-PPDU as shown in Table 7 in advance.
  • Part of the reserved bits in the special user information field of the trigger frame sent by the AP to the STA (for example, 3 bits in the uplink U-SIG reserved bits b25-b36 of the special user information field shown in FIG. 6 ) are used to indicate Table 7
  • the identifier of the bandwidth combination in 0-4.
  • the upstream bandwidth field (2bit) and the upstream bandwidth extension field of the trigger frame (1bit is added to the upstream bandwidth extension field and expanded to 3bit) are used to indicate the bandwidth combination information of each PPDU in the TBA-PPDU.
  • Table 8 is a list of another uplink bandwidth field and an uplink bandwidth extension field provided by this embodiment of the present application. Compared with Table 2, the upstream bandwidth extension field in Table 8 is represented by 3 bits, thereby indicating more bandwidth combinations. The extra extended bits may come from some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame.
  • the uplink bandwidth field and the uplink bandwidth extension field shown in Table 8 can indicate all possible combinations in the entire 320MHz bandwidth (the reservation in Table 8 can also indicate multiple combined bandwidths in other granularity divisions).
  • Table 8 can be used to indicate that the HE TB PPDU is not included, and only at least one of the EHT TB PPDU and the EHT+TB PPDU is included.
  • the column Bandwidth of EHT TB PPDU in Table 8 there is only one number (eg row 2) indicating that there is only one EHT TB PPDU or EHT+TB PPDU.
  • A-B (eg line 23) represents a combination of two EHT TB PPDUs or EHT+TB PPDUs.
  • A-B-C (eg line 25) represents a combination of three EHT TB PPDUs or EHT+TB PPDUs.
  • A-B-C-D (eg line 24) represents a combination of four EHT TB PPDUs or EHT+TB PPDUs.
  • some or all of some of the entries in Table 8 above are combined into one row, so as to reserve more reserved bits.
  • the bandwidth combinations indicated by rows 18, 23, and 24 in Table 8 are actually the same bandwidth combination 80-80-80-80.
  • the 18th, 23rd and 24th rows in Table 8 are merged into one row.
  • the bandwidth combinations indicated in the 27th row and the 31st row in Table 8 are actually the same bandwidth combination 160-160.
  • the 18th, 23rd and 24th rows in Table 8 are merged into one row. It can be seen that the combined Table 8 can reserve more reserved bits, thereby indicating more possible bandwidth combinations.
  • the AP selects a reserved entry in Table 2 to indicate A-PPDU extension.
  • Table 9 shows the upstream bandwidth field and the upstream bandwidth extension field after redefining a reserved entry in Table 2.
  • the upstream bandwidth field and the upstream bandwidth extension field are used to indicate the TB A-PPDU extension.
  • use other fields separately to indicate the combination of the bandwidth of each PPDU in the TBA-PPDU For example, use other fields to indicate the bandwidth combination of TBA-PPDU as shown in Table 7.
  • the other fields may be derived from some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame.
  • the user information list field of the trigger frame shown in FIG. 6 may be improved, and the improved user information field includes multiple special user information fields.
  • FIG. 10 is a schematic structural diagram of an improved trigger frame provided by an embodiment of the present application.
  • Three additional special user information fields are added to the user information list field of the trigger frame, that is, the improved user information list field of the trigger frame includes four special user information fields, as shown in FIG. 10 .
  • one trigger frame can indicate the scheduling of 4 TB PPDUs at the same time, and each special user information field corresponds to the information indicating the scheduled TB PPDU.
  • each special user information field is also used to indicate the public information required in the U-SIG of the scheduled TB PPDU.
  • the user information list field of the above-mentioned improved trigger frame includes four special user information fields is only an example, not a limitation, and the user information list field may include any number of special user information fields.
  • the common fields of the trigger frame are separately indicated (eg b56-b57) to indicate the number of special user information fields.
  • the trigger frame may not use a special bit to indicate the number of the special user information field. For example, when the STA parses the trigger frame and determines that the reserved bit b55 indicates that the special user field exists, the STA can determine the number of the special user information field by the number of special association identifiers (AID12).
  • the special association identifiers of multiple special user fields can be set to 2007.
  • the above AID is not allocated to any STA, but is regarded as an identifier of a special user field.
  • the AP sends the indication information to the STA after generating the indication information according to the above-mentioned various implementation manners.
  • the STA receives the indication information.
  • the STA determines the bandwidth information of the TB PPDU corresponding to the STA, and sends the TB PPDU to the AP on the bandwidth of the TB PPDU corresponding to the STA.
  • relevant descriptions in existing standards which are not limited in this embodiment.
  • the EHTTB PPDU or EHT+TB PPDU sent by the STA to the AP includes one or more of the bandwidth of the STA sending the TB PPDU, the aggregated bandwidth of the TBA-PPDU, and the bandwidth combination of each PPDU in the TBA-PPDU. kind of information.
  • the STA determines the bandwidth for sending the TB PPDU according to the indication information, and also determines the EHT-LTF sequence used for sending the TB PPDU according to the indication information.
  • the EHT-LTF sequence is mainly used for channel estimation, and the EHT-LTF sequence is usually indicated by the U-SIG field (such as the bandwidth field of the U-SIG field) of the EHT TB PPDU.
  • the EHT-LTF sequence is carried in the EHT-LTF field of the EHT TB PPDU.
  • the OFDM symbol is composed of multiple independently modulated sub-carrier signals
  • the phases of each sub-carrier are the same or similar
  • the superimposed signal will be modulated by the same initial phase signal, resulting in a large instantaneous power peak, which is determined by This results in a higher peak-to-average power ratio (PAPR).
  • PAPR peak-to-average power ratio
  • the 802.11be standard designs different EHT-LTF sequences according to different PPDU bandwidths.
  • EHT-LTF sequences are used to optimize PAPR at different bandwidths.
  • the symbols of the EHT-LTF field have three sizes (3.2 microseconds, 6.4 microseconds, 12.8 microseconds) after removing the guard interval, which are called 1xEHT-LTF, 2xEHT-LTF, and 4x EHT-LTF respectively.
  • all EHT-LTF sequences are composed of 1, -1, and 0, and the specific sequence is not limited in this embodiment.
  • the 802.11be standard defines several types of EHT-LTF sequences as shown in Table 10. Wherein, the EHT-LTF sequence shown in Table 10 is indicated by the bandwidth field (B3-B5) in the U-SIG field of the EHT TB PPDU.
  • the STA when the STA confirms the bandwidth indicated by the AP for sending the TB PPDU, the STA can determine the EHT-LTF sequence used for sending the TB PPDU. For example, the STA receives indication information, the indication information indicates that the bandwidth of the STA to send the EHT TB PPDU is 80 MHz. Then the STA determines from Table 10 that the optional EHT-LTF sequences include EHT-LTF 80MHz_1x , EHT-LTF 80MHz_2x , and EHT-LTF 80MHz_4 .
  • EHT-LTF sequence among 1xEHT-LTF, 2xEHT-LTF, and 4xEHT-LTF is specifically selected depends on the transmission mode, channel environment, etc., which is not limited in this embodiment.
  • the STA selects the EHT-LTF sequence according to the aggregated bandwidth of the TBA-PPDU.
  • the benefit of choosing the EHT-LTF sequence according to this implementation is that the PAPR can be optimized for the aggregated bandwidth.
  • the device that implements the basic characteristics of EHT can realize transparent transmission. That is to say, a device that implements the basic features of EHT will consider the entire aggregated bandwidth as a PPDU, or HE+EHT TB PPDU, and can identify and process data.
  • the STA selects the EHT-LTF sequence according to the bandwidth of each TB PPDU.
  • the advantage of selecting the EHT-LTF sequence according to this implementation manner is that the unification of the EHT-LTF sequence can be realized for devices that do not implement the basic characteristics of the EHT.
  • the uplink bandwidth field and the uplink bandwidth extension field are used to indicate the bandwidth of a certain PPDU, a device that implements the basic characteristics of the EHT can implement transparent transmission.
  • the STA selects the EHT-LTF sequence according to the bandwidth combination of each TB PPDU in the TB A-PPDU.
  • the benefit of choosing the EHT-LTF sequence according to this implementation is that the PAPR of the EHT-LTF sequence can be further optimized. For example, according to different bandwidth combinations, different phase coefficients of +1 or -1 are multiplied, so that the PAPR is optimal in each combination.
  • the STA selects the EHT-LTF sequence according to the aggregated bandwidth of the TBA-PPDU and the type of PPDU transmitted within each 80MHz.
  • the AP needs to further indicate the type of PPDU transmitted in each 80MHz.
  • the STA reserves bits (eg, 4 bits) according to part of the common information field of the trigger frame, and the bit value of each bit indicates HE, and the bit value of each bit indicates EHT or EHT+. It should be noted that if there is only one HE PPDU in the A-PPDU, and it must be located on the main 80MHz or main 160MHz channel, the trigger frame does not need to indicate the type of PPDU.
  • the trigger frame only needs to indicate whether the main 80MHz or main 160MHz channel is an HE PPDU.
  • the advantage of selecting the EHT-LTF sequence according to this implementation is that it can further consider the type of TB PPDU and optimize the PAPR of the EHT-LTF sequence.
  • the AP selects one or more information according to the bandwidth of the TB PPDU, the aggregated bandwidth of the TB A-PPDU, and the bandwidth combination of each PPDU in the TB A-PPDU EHT-LTF sequence.
  • the EHT-LTF sequence selected by the AP is used for channel estimation. For example, ideally, after the data receiving end receives the signal, the channel value can be obtained by dividing the received signal by a known sequence (such as an EHT-LTF sequence) for each subcarrier.
  • the AP selects the EHT-LTF sequence according to the aggregated bandwidth of the TBA-PPDU.
  • the AP selects the EHT-LTF sequence according to the bandwidth of each TBPPDU.
  • the AP selects the EHT-LTF sequence according to the bandwidth combination of each TB PPDU in the TB A-PPDU.
  • the AP selects the EHT-LTF sequence according to the aggregated bandwidth of the TBA-PPDU and the type of the PPDU transmitted within each 80MHz.
  • the bandwidth of the PPDU is divided according to the granularity of 80 MHz, and may also be divided according to other granularities, which is not limited in this embodiment.
  • the AP needs to further indicate the type of PPDU transmitted in each 80MHz.
  • the candidate EHT-LTF sequences can refer to various EHT-LTF sequences shown in Table 10, or the EHT-LTF sequences can be further designed and optimized according to the above characteristics.
  • the PAPR is further optimized.
  • the HE TB PPDU may exist in the TBA-PPDU, but in order to ensure the transmission of the HE TB PPDU by the traditional HE device, this embodiment does not involve changing the HE TB PPDU.
  • An embodiment of the present application provides a bandwidth indication method.
  • an access point When multiple TB PPDUs are aggregated and transmitted, an access point indicates multiple bandwidth information or aggregated bandwidth information or a combination of aggregated bandwidths to multiple sites, which is beneficial to access point scheduling. Multiple simultaneous TB PPDUs to better utilize the high bandwidth capabilities of the access point.
  • bandwidth method according to the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 10 . 11 to 14, the bandwidth indicating apparatus and related equipment of the embodiment of the present application will be described in detail. It should be understood that the bandwidth indication apparatus and related devices shown in FIGS. 11 to 14 can implement one or more steps in the method flow shown in FIGS. 1 to 10 . In order to avoid repetition, detailed description is omitted here.
  • FIG. 11 is a schematic diagram of a bandwidth indication apparatus provided by an embodiment of the present application.
  • the bandwidth indication apparatus shown in FIG. 11 is used to implement the methods performed by the stations in the embodiments shown in the foregoing FIGS. 1 to 10 .
  • the bandwidth indicating device includes a transceiver unit 1101 and a processing unit 1102 .
  • the transceiver unit 1101 is used for receiving indication information from an access point.
  • the indication information is used to indicate the bandwidth information of three or more TB PPDUs.
  • Three or more TB PPDUs include one or more of HE TB PPDU, EHT TB PPDU, and evolved EHT TB PPDU.
  • the processing unit 1102 is configured to determine the bandwidth information of the TB PPDU corresponding to the station.
  • the number of indication information is multiple.
  • the indication information is carried in the aggregation trigger frame.
  • the aggregate trigger frame includes multiple trigger frames, and one trigger frame carries one indication information.
  • the number of indication information is multiple.
  • the indication information is carried in one trigger frame or multiple trigger frames. Multiple trigger frames are obtained by duplicating the same trigger frame in different frequency domains.
  • the indication information is used to indicate one of the bandwidth information of the TB PPDU, the aggregated bandwidth information of the trigger-based aggregate physical layer protocol data unit TBA-PPDU, or the bandwidth combination information of each PPDU in the TBA-PPDU. one or more.
  • the indication information is carried in at least one of the following fields of the trigger frame: a first field and a second field.
  • the first field is the upstream bandwidth field of the trigger frame, or the upstream bandwidth field and the upstream bandwidth extension field.
  • the second field is a reserved field of the trigger frame.
  • the reserved field of the trigger frame is any one of the following fields: the uplink efficient reserved field of the common information field, the reserved field of the common information field, the uplink general signaling reserved field of the special user information field, the special user information reserved field for the field.
  • some or all of the bits in at least one of the uplink bandwidth field and the uplink bandwidth extension field of the trigger frame are used to indicate at least one of the three types of bandwidth information described in the foregoing implementation manner.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate at least one of the three types of bandwidth information described in the foregoing implementation manner.
  • a trigger frame includes multiple special user fields, and each special user field is used to indicate the bandwidth of one TB PPDU.
  • the processing unit 1102 is further configured to generate a very high throughput long training EHT-LTF sequence based on the indication information.
  • the transceiver unit 1101 is further configured to send the EHT-LTF sequence to the access point.
  • the processing unit 1102 is further configured to generate an EHT-LTF sequence based on the indication information, including:
  • the EHT-LTF sequence is generated.
  • FIG. 12 is a schematic diagram of a site provided by an embodiment of the present application.
  • the site may be a device (eg, a chip) capable of executing the bandwidth indication method provided by the embodiment of the present application.
  • the station may include a transceiver 1201 , at least one processor 1202 and a memory 1203 .
  • the transceiver 1201, the processor 1202 and the memory 1203 may be connected to each other through one or more communication buses, or may be connected to each other in other ways.
  • the transceiver 1201 may be used for sending data or receiving data. It can be understood that the transceiver 1201 is a general term and may include a receiver and a transmitter. For example, the receiver is used to receive indication information from the access point. As another example, the transmitter is used to send the TB PPDU to the access point.
  • the processor 1202 may be used to process the data of the site.
  • the processor 1202 may include one or more processors, for example, the processor 1202 may be one or more central processing units (CPUs), network processors (NPs), hardware chips, or any combination thereof .
  • the processor 1202 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.
  • the memory 1203 is used for storing program codes and the like.
  • the memory 1203 may include a volatile memory (volatile memory), such as random access memory (RAM); the memory 1203 may also include a non-volatile memory (non-volatile memory), such as a read-only memory (read- only memory, ROM), flash memory (flash memory), hard disk drive (HDD) or solid-state drive (solid-state drive, SSD); the memory 1203 may also include a combination of the above-mentioned types of memory.
  • processor 1202 and memory 1203 may be coupled through an interface, or may be integrated together, which is not limited in this embodiment.
  • transceiver 1201 and processor 1202 may be used to execute the bandwidth indication method provided by the embodiment of the present application, and the specific implementation manner is as follows:
  • the transceiver 1201 is used for receiving indication information from the access point.
  • the indication information is used to indicate the bandwidth information of three or more trigger-based physical layer protocol data units TB PPDUs.
  • three or more TB PPDUs include one or more of HE TB PPDU, EHT TB PPDU, and evolved EHT TB PPDU.
  • the processor 1202 is configured to determine the bandwidth information of the TB PPDU corresponding to the station.
  • the transceiver 1201 is further configured to send the TB PPDU to the access point on the bandwidth of the TB PPDU corresponding to the station.
  • the number of indication information is multiple.
  • the indication information is carried in the aggregation trigger frame.
  • the aggregate trigger frame includes multiple trigger frames, and one trigger frame carries one indication information.
  • the number of indication information is multiple.
  • the indication information is carried in one trigger frame or multiple trigger frames. Multiple trigger frames are obtained by duplicating the same trigger frame in different frequency domains.
  • the indication information is used to indicate one of the bandwidth information of the TB PPDU, the aggregated bandwidth information of the trigger-based aggregate physical layer protocol data unit TBA-PPDU, or the bandwidth combination information of each PPDU in the TBA-PPDU. one or more.
  • the indication information is carried in at least one of the following fields of the trigger frame: a first field and a second field.
  • the first field is the upstream bandwidth field of the trigger frame, or the upstream bandwidth field and the upstream bandwidth extension field.
  • the second field is a reserved field of the trigger frame.
  • the reserved field of the trigger frame is any one of the following fields: the uplink efficient reserved field of the common information field, the reserved field of the common information field, the uplink general signaling reserved field of the special user information field, the special user information reserved field for the field.
  • some or all of the bits in at least one of the uplink bandwidth field and the uplink bandwidth extension field of the trigger frame are used to indicate at least one of the three types of bandwidth information described in the foregoing implementation manner.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate at least one of the three types of bandwidth information described in the foregoing implementation manner.
  • a trigger frame includes multiple special user fields, and each special user field is used to indicate the bandwidth of one TB PPDU.
  • the processor 1202 is further configured to generate a very high throughput long training EHT-LTF sequence based on the indication information.
  • the transceiver 1201 is also used to transmit the EHT-LTF sequence to the access point.
  • the processor 1202 is further configured to generate a very high throughput long training EHT-LTF sequence based on the indication information, including:
  • the EHT-LTF sequence is generated.
  • FIG. 13 is a schematic diagram of another bandwidth indication apparatus provided by an embodiment of the present application.
  • the bandwidth indication apparatus shown in FIG. 13 is used to implement the method performed by the access point in the above embodiment.
  • the bandwidth indicating device includes a processing unit 1301 and a transceiver unit 1302 .
  • the processing unit 1301 is configured to generate indication information.
  • the indication information is used to indicate the bandwidth information of three or more trigger-based physical layer protocol data units TB PPDUs.
  • Three or more TB PPDUs include one or more of HE TB PPDU, EHT TB PPDU, and evolved EHT TB PPDU.
  • the transceiver unit 1302 is used for sending indication information to the station.
  • the number of indication information is multiple.
  • the indication information is carried in the aggregation trigger frame.
  • the aggregate trigger frame includes multiple trigger frames, and one trigger frame carries one indication information.
  • the number of indication information is multiple.
  • the indication information is carried in one trigger frame or multiple trigger frames. Multiple trigger frames are obtained by duplicating the same trigger frame in different frequency domains.
  • the indication information is used to indicate one of the bandwidth information of the TB PPDU, the aggregated bandwidth information of the trigger-based aggregate physical layer protocol data unit TBA-PPDU, or the bandwidth combination information of each PPDU in the TBA-PPDU. one or more.
  • the indication information is carried in at least one of the following fields of the trigger frame: a first field and a second field.
  • the first field is the upstream bandwidth field of the trigger frame, or the upstream bandwidth field and the upstream bandwidth extension field.
  • the second field is a reserved field of the trigger frame.
  • the reserved field of the trigger frame is any one of the following fields: the uplink efficient reserved field of the common information field, the reserved field of the common information field, the uplink general signaling reserved field of the special user information field, the special user information reserved field for the field.
  • some or all of the bits in at least one of the uplink bandwidth field and the uplink bandwidth extension field of the trigger frame are used to indicate at least one of the three types of bandwidth information described in the foregoing implementation manner.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate at least one of the three types of bandwidth information described in the foregoing implementation manner.
  • a trigger frame includes multiple special user fields, and each special user field is used to indicate the bandwidth of one TB PPDU.
  • the transceiver unit 1302 is further configured to receive the EHT-LTF sequence from the station.
  • the processing unit 1301 is further configured to perform channel estimation according to the EHT-LTF sequence, where the EHT-LTF sequence is determined by the indication information.
  • FIG. 14 is a schematic diagram of an access point according to an embodiment of the present application.
  • the access point may be a device (eg, a chip) capable of executing the bandwidth indication method provided by the embodiment of the present application.
  • the access point may include a transceiver 1401 , at least one processor 1402 and a memory 1403 .
  • the transceiver 1401, the processor 1402, and the memory 1403 may be connected to each other through one or more communication buses, or may be connected to each other in other ways.
  • the transceiver 1401 may be used for sending data or receiving data. It can be understood that the transceiver 1401 is a general term and may include a receiver and a transmitter. For example, the receiver is used to receive TB PPDUs from stations. For another example, the transmitter is used to send the indication information to the station.
  • the processor 1402 may be configured to process the data of the access point.
  • the processor 1402 may include one or more processors, for example, the processor 1402 may be one or more central processing units (CPUs), network processors (NPs), hardware chips, or any combination thereof.
  • the processor 1402 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.
  • the memory 1403 is used for storing program codes and the like.
  • the memory 1403 may include volatile memory, such as random access memory RAM; the memory 1403 may also include non-volatile memory, such as read-only memory ROM, flash memory, hard disk HDD or solid state disk SSD; memory 1403 may also include the above A combination of types of memory.
  • processor 1402 and memory 1403 may be coupled through an interface, or may be integrated together, which is not limited in this embodiment.
  • transceiver 1401 and processor 1402 may be used to execute the bandwidth indication method provided in this embodiment of the present application, and a specific implementation manner is as follows:
  • the processor 1402 is configured to generate indication information.
  • the indication information is used to indicate the bandwidth information of three or more trigger-based physical layer protocol data units TB PPDUs.
  • Three or more TB PPDUs include one or more of HE TB PPDU, EHT TB PPDU, and evolved EHT TB PPDU.
  • the transceiver 1401 is used for sending indication information to the station.
  • the number of indication information is multiple.
  • the indication information is carried in the aggregation trigger frame.
  • the aggregate trigger frame includes multiple trigger frames, and one trigger frame carries one indication information.
  • the number of indication information is multiple.
  • the indication information is carried in one trigger frame or multiple trigger frames. Multiple trigger frames are obtained by duplicating the same trigger frame in different frequency domains.
  • the indication information is used to indicate one of the bandwidth information of the TB PPDU, the aggregated bandwidth information of the trigger-based aggregate physical layer protocol data unit TBA-PPDU, or the bandwidth combination information of each PPDU in the TBA-PPDU. one or more.
  • the indication information is carried in at least one of the following fields of the trigger frame: a first field and a second field.
  • the first field is the upstream bandwidth field of the trigger frame, or the upstream bandwidth field and the upstream bandwidth extension field.
  • the second field is a reserved field of the trigger frame.
  • the reserved field of the trigger frame is any one of the following fields: the uplink efficient reserved field of the common information field, the reserved field of the common information field, the uplink general signaling reserved field of the special user information field, the special user information reserved field for the field.
  • some or all of the bits in at least one of the uplink bandwidth field and the uplink bandwidth extension field of the trigger frame are used to indicate at least one of the three types of bandwidth information described in the foregoing implementation manner.
  • some or all of the reserved bits in at least one of the common information field and the special user information field of the trigger frame are used to indicate at least one of the three types of bandwidth information described in the foregoing implementation manner.
  • a trigger frame includes multiple special user fields, and each special user field is used to indicate the bandwidth of one TB PPDU.
  • transceiver 1401 is also used to receive EHT-LTF sequences from stations.
  • the processor 1402 is further configured to perform channel estimation according to the EHT-LTF sequence, where the EHT-LTF sequence is determined by the indication information.
  • An embodiment of the present application provides a communication system, where the communication system includes the station and the access point described in the foregoing embodiments.
  • the embodiments of the present application provide a computer-readable storage medium, where a program or an instruction is stored in the computer-readable storage medium, and when the program or the instruction runs on a computer, the computer executes the bandwidth indication method in the embodiment of the present application.
  • An embodiment of the present application provides a chip or a chip system, the chip or chip system includes at least one processor and an interface, the interface and the at least one processor are interconnected by a line, and the at least one processor is used to run a computer program or instruction to perform the present application The bandwidth indication method in the embodiment.
  • the interface in the chip may be an input or output interface, a pin or a circuit, and the like.
  • the chip system in the above aspects may be a system on chip (system on chip, SOC), or a baseband chip, etc.
  • the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, and the like.
  • the chip or chip system described above in this application further includes at least one memory, where instructions are stored in the at least one memory.
  • the memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).
  • a computer program product includes one or more computer instructions.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • Computer instructions may be stored on or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server, or data center over a wire (e.g.
  • coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to transmit to another website site, computer, server or data center.
  • a computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media.
  • the available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks, SSD)) etc.

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Abstract

本申请实施例提供一种带宽指示方法、装置及相关设备。在三个及以上TB PPDU聚合传输时，接入点向三个及以上站点指示带宽信息或者指示聚合带宽信息或者指示聚合带宽的组合，有利于接入点调度三个及以上同时发送的TB PPDU，从而更好地利用接入点的大带宽能力。

Description

一种带宽指示方法、装置及相关设备
本申请要求于2021年4月22日提交中国国家知识产权局、申请号为202110437542.5、申请名称为“一种带宽指示方法、装置及相关设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种带宽指示方法、装置及相关设备。
背景技术
接入点(access point，AP)和站点(station，STA)在数据通信时，可以根据信道的状况选择不同的物理层协议数据单元(PHY protocol data unit，PPDU)带宽进行传输。通常STA通过信道竞争获得发送权之后再进行上行数据传输。
随着无线局域网(wireless local area network，WLAN)标准的演进，802.11ax标准进一步引入了基于触发帧的调度式上行传输。例如，AP发送触发帧，触发帧中包含用于一个或多个STA发送高效基于触发的物理层协议数据单元(high efficient trigger based PHY protocol data unit，HE TB PPDU)的资源调度以及其他参数。STA接收到触发帧以后，在该触发帧所指示的资源单元(resource unit，RU)上发送HE TB PPDU。
但是，针对多个PPDU(例如多个HE TB PPDU)，或者更灵活的PPDU组合(例如HE TB PPDU与极高吞吐率基于触发的物理层协议数据单元(Extremely High Throughput trigger based PHY protocol data unit，EHTTB PPDU))如何指示带宽，目前标准中还没有相应的规范。
发明内容
本申请实施例提供一种带宽指示方法、装置及相关设备。该带宽指示方法实现在多个TB PPDU聚合传输时指示多个带宽信息，有利于接入点调度三个及以上同时发送的TB PPDU，从而更好地利用接入点的大带宽能力。
第一方面，本申请实施例提供一种带宽指示方法，该方法由站点所执行。其中，站点接收来自接入点的指示信息，指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息。其中，三个及以上TB PPDU可以是HE TB PPDU、EHTTB PPDU或者演进的EHTTB PPDU的任意组合。站点接收指示信息后，确定该站点对应的TB PPDU的带宽信息，并在站点对应的TB PPDU的带宽上向接入点发送TB PPDU。可见，该带宽指示方法实现在多个TB PPDU聚合传输时指示多个带宽信息，有利于接入点调度三个及以上同时发送的TB PPDU，从而有利于利用接入点的大带宽能力。
在一种可能的设计中，指示信息用于指示两个TB PPDU的带宽信息。其中，两个TB PPDU为两个HE TB PPDU，或者为两个EHTTB PPDU，或者为两个演进的EHTTB PPDU，或者为一个EHTTB PPDU和一个演进的EHTTB PPDU。可见，站点接收的指示信息还可以调度两个相同类型的TB PPDU，或者调度一个EHTTB PPDU和一个演进的EHTTB PPDU，从而有利于利用接入点的大带宽能力。
在一种可能的设计中，指示信息的数量为多个。指示信息承载于聚合触发帧中。聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。可见，多个带宽信息可以承载于多个不同的触发帧中，站点可以在预先协商的带宽资源上接收对应的带宽信息。
在一种可能的设计中，指示信息的数量为多个。指示信息承载于一个触发帧或者多个触发帧中。多个触发帧为同一触发帧在不同频域范围内复制得到的。可见，多个带宽信息可以承载于一个触发帧中，或者多个带宽信息可以承载于多个相同的触发帧中。
在一种可能的设计中，指示信息用于指示以下信息中的至少一种：TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中。可见，指示信息可以通过多种不同的方式指示多个TB PPDU的带宽信息。
在一种可能的设计中，指示信息承载于触发帧的以下字段的至少一种字段中：第一字段、第二字段。第一字段为触发帧的上行带宽字段，或者上行带宽字段和上行带宽扩展字段。第二字段为触发帧的预留字段。其中，触发帧的预留字段为以下字段的任意一种：公共信息字段的上行高效预留字段、公共信息字段的预留字段、特殊用户信息字段的上行通用信令预留字段、特殊用户信息字段的预留字段。
在一种可能的设计中，触发帧的上行带宽字段和上行带宽扩展字段至少一个字段中的部分或者全部比特用于指示上述可能的设计中描述的三种带宽信息中的至少一种。
在一种可能的设计中，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或全部比特用于指示上述可能的设计中描述的三种带宽信息中的至少一种。
在一种可能的设计中，一个触发帧包括多个特殊用户字段，一个特殊用户字段用于指示一个TB PPDU的带宽。
在一种可能的设计中，站点基于指示信息生成极高吞吐率长训练EHT-LTF序列，并向接入点发送EHT-LTF序列。可见，站点基于多个TB PPDU的带宽信息生成不同的EHT-LTF序列，有利于在不同的带宽情况下去优化峰均功率比。
在一种可能的设计中，站点基于TB PPDU的带宽信息、TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种，生成EHT-LTF序列。
第二方面，本申请实施例提供另一种带宽指示方法，该方法由接入点所执行。接入点生成指示信息，指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息。其中，三个及以上TB PPDU可以是HE TB PPDU、EHTTB PPDU或者演进的EHTTB PPDU的任意组合。接入点向站点发送指示信息。可见，接入点利用指示信息可以调度三个及以上同时发送的TB PPDU，从而更好地利用接入点的大带宽能力。
在一种可能的设计中，指示信息用于指示两个TB PPDU的带宽信息。其中，两个TB PPDU为两个HE TB PPDU，或者为两个EHTTB PPDU，或者为两个演进的EHTTB PPDU，或者为一个EHTTB PPDU和一个演进的EHTTB PPDU。可见，接入点还可以通过本实施例中的指示信息调度两个相同类型的TB PPDU，或者调度一个EHTTB PPDU和一个演进的EHTTB PPDU，从而更好地利用接入点的大带宽能力。
在一种可能的设计中，指示信息的数量为多个。指示信息承载于聚合触发帧中。聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。可见，接入点可以在不同的信道带宽内发送多个不同的触发帧。
在一种可能的设计中，指示信息的数量为多个。指示信息承载于一个触发帧或者多个触发帧中。多个触发帧为同一触发帧在不同频域范围内复制得到的。可见，接入点仅发送一个 触发帧，或者接入点发送的触发帧在不同的信道带宽内进行复制传输。
在一种可能的设计中，指示信息用于指示TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种。可见，指示信息可以通过多种不同的方式指示多个TB PPDU的带宽信息。
在一种可能的设计中，指示信息承载于触发帧的以下字段的至少一种字段中：第一字段、第二字段。第一字段为触发帧的上行带宽字段，或者上行带宽字段和上行带宽扩展字段。第二字段为触发帧的预留字段。其中，触发帧的预留字段为以下字段的任意一种：公共信息字段的上行高效预留字段、公共信息字段的预留字段、特殊用户信息字段的上行通用信令预留字段、特殊用户信息字段的预留字段。
在一种可能的设计中，触发帧的上行带宽字段和上行带宽扩展字段中至少一个字段的部分或者全部比特用于指示上述可能的设计中描述的三种带宽信息中的至少一种。
在一种可能的设计中，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或全部比特用于指示上述可能的设计中描述的三种带宽信息中的至少一种。
在一种可能的设计中，一个触发帧包括多个特殊用户字段，一个特殊用户字段用于指示一个TB PPDU的带宽。
在一种可能的设计中，接入点根据指示信息确定用于信道估计的EHT-LTF序列，并利用对应的EHT-LTF序列进行信道估计。
第三方面，本申请实施例提供一种带宽指示装置。该带宽指示装置包括收发单元和处理单元。其中，收发单元用于接收来自接入点的指示信息。指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息。其中，三个及以上TB PPDU包括高效基于触发的物理层协议数据单元、极高吞吐率基于触发的物理层协议数据单元、演进的极高吞吐率基于触发的物理层协议数据单元中的一种或多种。处理单元用于确定站点对应的TB PPDU的带宽信息。收发单元还用于在站点对应的TB PPDU的带宽上向接入点发送TB PPDU。
在一种可能的设计中，指示信息的数量为多个。指示信息承载于聚合触发帧中。聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。
在一种可能的设计中，指示信息的数量为多个。指示信息承载于一个触发帧或者多个触发帧中。多个触发帧为同一触发帧在不同频域范围内复制得到的。
在一种可能的设计中，指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息，包括：
所述指示信息用于指示TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种。
在一种可能的设计中，指示信息承载于触发帧的以下字段的至少一种字段中：第一字段、第二字段。第一字段为触发帧的上行带宽字段，或者上行带宽字段和上行带宽扩展字段。第二字段为触发帧的预留字段。其中，触发帧的预留字段为以下字段的任意一种：公共信息字段的上行高效预留字段、公共信息字段的预留字段、特殊用户信息字段的上行通用信令预留字段、特殊用户信息字段的预留字段。
在一种可能的设计中，触发帧的上行带宽字段和上行带宽扩展字段中至少一个字段的部分或者全部比特用于指示上述可能的设计中描述的三种带宽信息中的至少一种。
在一种可能的设计中，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或全部比特用于指示上述可能的设计中描述的三种带宽信息中的至少一种。
在一种可能的设计中，一个触发帧包括多个特殊用户字段，每一个特殊用户字段用于指示一个TB PPDU的带宽。
在一种可能的设计中，处理单元还用于基于指示信息生成极高吞吐率长训练EHT-LTF序列。收发单元还用于向接入点发送EHT-LTF序列。
在一种可能的设计中，处理单元还用于基于指示信息生成EHT-LTF序列，包括：
基于TB PPDU的带宽信息、TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种，生成EHT-LTF序列。
第四方面，本申请实施例提供另一种带宽指示装置。该带宽指示装置包括处理单元和收发单元。其中，处理单元用于生成指示信息。指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息。三个及以上TB PPDU包括高效基于触发的物理层协议数据单元、极高吞吐率基于触发的物理层协议数据单元、演进的极高吞吐率基于触发的物理层协议数据单元中的一种或多种。收发单元用于向站点发送指示信息。
在一种可能的设计中，指示信息的数量为多个。指示信息承载于聚合触发帧中。聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。
在一种可能的设计中，指示信息的数量为多个。指示信息承载于一个触发帧或者多个触发帧中。多个触发帧为同一触发帧在不同频域范围内复制得到的。
在一种可能的设计中，指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息，包括：
所述指示信息用于指示TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种。
在一种可能的设计中，指示信息承载于触发帧的以下字段的至少一种字段中：第一字段、第二字段。第一字段为触发帧的上行带宽字段，或者上行带宽字段和上行带宽扩展字段。第二字段为触发帧的预留字段。其中，触发帧的预留字段为以下字段的任意一种：公共信息字段的上行高效预留字段、公共信息字段的预留字段、特殊用户信息字段的上行通用信令预留字段、特殊用户信息字段的预留字段。
在一种可能的设计中，触发帧的上行带宽字段和上行带宽扩展字段中至少一个字段的部分或者全部比特用于指示上述可能的设计中描述的三种带宽信息中的至少一种。
在一种可能的设计中，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或全部比特用于指示上述可能的设计中描述的三种带宽信息中的至少一种。
在一种可能的设计中，一个触发帧包括多个特殊用户字段，每一个特殊用户字段用于指示一个TB PPDU的带宽。
在一种可能的设计中，收发单元还用于接收来自站点的EHT-LTF序列。处理单元还用于根据EHT-LTF序列进行信道估计，EHT-LTF序列是由指示信息确定的。
第五方面，本申请实施例提供一种站点，该设备具有实现第一方面所提供的带宽指示方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第六方面，本申请实施例提供一种接入点，该设备具有实现第二方面所提供的带宽指示方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第七方面，本实施例还提供一种通信系统，该系统包括如第五方面所述的站点和如第六方面所述的接入点。
第八方面，本申请实施例提供一种计算机可读存储介质，该可读存储介质包括程序或指令。当所述程序或指令在计算机上运行时，使得计算机执行第一或第二方面中任一种可能实现方式中的方法。
第九方面，本申请实施例提供一种芯片或者芯片系统，该芯片或者芯片系统包括至少一个处理器和接口。接口和至少一个处理器通过线路互联，至少一个处理器用于运行计算机程序或指令，以进行第一或第二方面任一种可能的实现方式中任一项所描述的方法。
其中，芯片中的接口可以为输入或输出接口、管脚或电路等。
上述方面中的芯片系统可以是片上系统(system on chip，SOC)，也可以是基带芯片等。其中基带芯片可以包括处理器、信道编码器、数字信号处理器、调制解调器和接口模块等。
在一种可能的实现中，本申请中上述描述的芯片或者芯片系统还包括至少一个存储器，该至少一个存储器中存储有指令。该存储器可以为芯片内部的存储单元，例如，寄存器、缓存等，也可以是该芯片的存储单元(例如，只读存储器、随机存取存储器等)。
第十方面，本申请实施例提供一种计算机程序或计算机程序产品，包括代码或指令。当代码或指令在计算机上运行时，使得计算机执行第一或第二方面中任一种可能实现方式中的方法。
附图说明
图1为802.11ax定义的触发帧帧结构的示意图；
图2为本申请实施例提供的一种通信系统的示意图；
图3为6GHz频段中80MHz或160MHz或320MHz带宽的信道划分的示意图；
图4为802.11be定义的触发帧帧结构的示意图；
图5为本申请实施例提供的一种带宽指示方法的流程示意图；
图6为本申请实施例提供的第一种聚合触发帧以及聚合PPDU的示意图；
图7a为本申请实施例提供的第一种AP和STA之间的聚合触发帧以及聚合PPDU传输的流程示意图；
图7b为本申请实施例提供的第二种AP和STA之间的聚合触发帧以及聚合PPDU传输的流程示意图；
图8a为本申请实施例提供的第二种聚合触发帧以及聚合PPDU的示意图；
图8b为本申请实施例提供的第三种聚合触发帧以及聚合PPDU的示意图；
图9为本申请实施例提供的第四种聚合触发帧以及聚合PPDU的示意图；
图10为本申请实施例提供的一种改进的触发帧帧结构的示意图；
图11为本申请实施例提供的一种带宽指示装置的示意图；
图12为本申请实施例提供的一种站点的示意图；
图13为本申请实施例提供的另一种带宽指示装置的示意图；
图14为本申请实施例提供的另一种接入点的示意图。
具体实施方式
在本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方 式呈现相关概念。
在本申请的实施例中，术语“第二”、“第一”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第二”、“第一”的特征可以明示或者隐含地包括一个或者更多个该特征。
本申请的实施例中，术语“多个”的含义是指两个或三个及以上，例如，多个触发帧是指两个或三个及以上的触发帧。
应理解，在本文中对各种所述示例的描述中所使用的术语只是为了描述特定示例，而并非旨在进行限制。如在对各种所述示例的描述和所附权利要求书中所使用的那样，单数形式“一个(“a”，“an”)”和“该”旨在也包括复数形式，除非上下文另外明确地指示。
应理解，在本申请的各个实施例中，各个过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
无线局域网(wireless local area network，WLAN)的协议标准从802.11a、802.11b、802.11g开始，历经802.11n、802.11ac、802.11ax到正在讨论的802.11be。其中，802.11ax标准称为高效(high efficient，HE)版本，最大支持的物理层协议数据单元(PHY protocol data unit，PPDU)的带宽为160MHz。802.11be标准称为极高吞吐率(extremely high throughput，EHT)版本，最大支持的PPDU的带宽为320MHz。802.11be以后的标准可以称为演进的(未来的)极高吞吐率版本，通过EHT+来表示，比如指代802.11bx标准，802.11cx标准。其中，本申请中的演进的极高吞吐率基于触发的物理层协议数据单元EHT+TB PPDU对应于802.11be以后的标准所对应的基于触发的物理层协议数据单元。
接入点(access point，AP)和站点(station，STA)在数据通信时，可以根据信道的状况选择不同的物理层协议数据单元(PHY protocol data unit，PPDU)带宽进行传输。通常STA通过信道竞争获得发送权之后再进行上行数据传输。其中，802.11ax标准进一步引入了基于触发帧(trigger frame，TF)的调度式上行传输。例如，AP发送触发帧，触发帧中包含用于一个或多个STA发送高效基于触发的物理层协议数据单元(high efficient trigger based PHY protocol data unit，HE TB PPDU)的资源调度以及其他参数。STA接收到触发帧以后，在该触发帧所指示的资源单元(resource unit，RU)上发送HE TB PPDU。
其中，802.11ax标准定义的触发帧帧结构如图1所示。其中，触发帧包含公共信息(commoninformation)字段和用户信息列表(user informationlist)字段。公共信息字段和用户信息字段的具体内容如图1所示。其中，公共信息字段包含所有STA都需要读取的公共信息。公共信息字段中的上行带宽(uplink bandwidth)字段指示该触发帧所触发的HE TB PPDU的带宽。上行带宽字段利用两比特(bit)来表示。其中，00表示20兆赫兹(MHz)，01表示40MHz，10表示80MHz，11表示160MHz或者80MHz+80MHz。其中，80MHz+80MHz表示两个80MHz不连续的情况。用户信息列表字段包括一个或多个用户信息字段，每个用户信息字段包含不同STA分别需要读取的信息。在用户信息字段中，关联标识(association identification 12，AID12，表示AID的低12比特)表示某一个STA的站点标识。资源单元分配(RU allocation)字段用于指示STA(即AID12所指示的STA)所分配到的资源单元的位置。
其中，STA接收到触发帧以后，从中该触发帧中解析出与自己的AID相匹配的用户信息字段。然后，STA在与自己的AID相匹配的用户信息字段中资源单元分配字段所指示的RU 上发送HE TB PPDU。其中，HE TB PPDU的各个字段的名称和作用可以如表1所示。
表1：HE TB PPDU中字段列表
Figure PCTCN2022087249-appb-000001
其中，在HE TB PPDU的HE-SIG-A字段中，存在带宽字段。该带宽字段用于指示HE TB PPDU的带宽。该带宽字段通常也采用2bit来表示，其内容和含义与触发帧中的UL BW字段相同。
但是，上述AP和STA之间的传输流程只包括触发帧如何指示一个TB PPDU的带宽。针对多个TB PPDU(也可以称为聚合PPDU(aggregate PPDU，A-PPDU))如何指示带宽，目前标准中还没有相应的规范。
为了解决上述问题，本申请实施例提供一种带宽指示方法。该带宽指示方法实现在多个TB PPDU聚合传输时指示多个带宽信息，有利于接入点调度三个及以上同时发送的TB PPDU，从而有利于利用接入点的大带宽能力。
本申请实施例提供的带宽指示方法应用于如图2所示的通信系统中。该通信系统包括AP和STA。其中，AP是一个网络的创建者，是网络的中心节点。例如，一般家庭或办公室使用的无线路由器就是一个AP。AP还包括通信服务器、交换机、网桥等设备。每一个连接到无线网络中的终端(如笔记本电脑、掌上电脑(personal digital assistant，PDA)、智能手机等其它可以联网的用户设备)都可称为一个STA。图2所示的通信系统中包括两个AP和三个STA，仅为一种示例，本实施例不作限定。本申请实施例提供的带宽指示方法适用于AP和STA(如图2的接入点1和站点1)之间的数据通信，也适用于AP和AP(如图2的接入点1和接入点2)之间的数据通信，还适用于STA和STA(如图2的站点2和站点3)之间的数据通信。其中，AP和STA之间，AP和AP之间以及STA和STA之间的通信还可以是一对多的通信。例如，图2所示的AP、STA1、STA2、STA3分别都可以是一个或多个设备，本实施例不作限定。
下面对本申请实施例涉及的相关概念进行描述。
图3为6GHz频段中80MHz或160MHz或320MHz带宽的信道划分的示意图。其中，UNII表示非授权国际信息基础设施无线电频带(the unlicensed national information infrastructureradio band)。其中，STA可以停靠在如图3所示的信道位置或频率范围上，并基于所停靠的信道位置或频率范围接收指示信息。其中，802.11be为了有效利用信道，设计了两种320MHz信道。两种320MHz信道包括：中心频率为31MHz或95MHz或159MHz的320MHz-1信道、中心频率为63MHz或127MHz或191MHz的320MHz-2信道，如图3所示。
802.11be沿用了802.11ax中基于触发的传输。802.11be的触发帧复用802.11ax的触发帧类型、子类型，可以同时被HE STA和EHT STA接收和理解。图4为802.11be定义的触发帧帧结构的示意图。图4所示的触发帧的用户信息列表字段中的一个特殊用户信息字段用于携带上行EHT的带宽信息。其中，特殊用户信息字段并不携带用户信息。特殊用户信息字段中的关联标识AID12为特殊用户信息字段的指示。
图4中特殊用户信息字段的上行EHT带宽字段也称为上行带宽扩展字段。上行带宽扩展字段用于与公共信息字段中的上行带宽字段联合指示EHT TB PPDU的带宽。其中，上行带宽字段还可以同时用于指示HE TB PPDU的带宽，如表2所示。
表2：上行带宽字段和上行带宽扩展字段列表
Figure PCTCN2022087249-appb-000002
其中，表2的第一列表示上行带宽字段，该字段通过2bit来表示。第一列中的值为上行带宽字段的值。表2的第二列表示HE TB PPDU的带宽，HE TB PPDU的带宽由第一列的2bit指示。也就是说，当触发帧只用于调度HE TB PPDU时，STA按照第一列确定HE TB PPDU的带宽。应注意，表2中的值为十进制。例如，表2的第二行第一列中的值为0(2bit的二进制表示为00)。第二行第一列的2bit指示HE TB PPDU的带宽为20MHz。又例如，表2的第六行第一列中的值为1(2bit的二进制表示为01)。第六行第一列的2bit指示HE TB PPDU的带宽为40MHz。
其中，表2的第三列表示上行带宽扩展字段，该字段也通过2bit来表示。第三列中的值为上行带宽扩展字段的值。表2的第四列表示EHT TB PPDU的带宽，EHT TB PPDU的带宽由第一列的2bit和第三列的2bit共同指示。也就是说，当触发帧只用于调度EHT TB PPDU时，STA按照第一列和第三列确定EHT TB PPDU的带宽。例如，表2的第二行第一列中的值为0(2bit的二进制表示为00)，第二行第三列中的值为0((2bit的二进制表示为00))。第二行第一列的2bit和第二行第三列的2bit共同指示EHT TB PPDU的带宽为20MHz。
其中，特殊用户信息字段除了上行带宽扩展字段外，还包括的其他字段如图4所示。其中，AID12关联标识为一个特殊值2007，表示用户信息列表中的该字段为特殊用户信息字段。物理层版本标识字段用于指示触发帧为EHT或以后标准中哪一代的触发帧。例如，0表示EHT，1表示11bx，2表示11cx等。上行EHT空间复用1字段和上行EHT空间复用2字段，用于指示EHT PPDU中通用信令字段(universal SIG，U-SIG)中的空间复用字段。U-SIG预留比特字段，用于指示U-SIG中的预留比特。
其中，公共信息字段除了上行带宽字段外，还包括的其他字段如图4所示。上行空间复用字段用于指示HE PPDU中HE-SIG-A中的空间复用字段。上行HE-SIG-A2预留字段用于指示HE PPDU中HE-SIG-A2(HE-SIG-A的第二个符号)中的预留比特。其中，该上行HE-SIG-A2预留字段还重新定义HE或EHT指示比特(公共字段b54)和特殊用户信息字段存在指示比特(公共字段b55)。HE或EHT指示比特用于指示主160MHz内传输的是HE TB PPDU还是EHT TB PPDU。其中，b54指示1表示主160MHz内传输的是HE TB PPDU，b54指示0表示主160MHz内传输的是EHT TB PPDU。特殊用户信息字段存在指示比特用于指示特殊用户字段是否存在。其中，b55指示1表示不存在，b55指示0表示存在。也就是说，特殊用户信息字段存在指示比特间接指示是否调度EHT TB PPDU(因为特殊用户信息字段还指示EHT TB PPDU所需要的公共信息)。例如，若b54指示1，则表示主160MHz信道传输的是HE TB PPDU。若b55指示0，表示存在特殊用户字段，间接指示该触发帧还调度EHT TB PPDU。其中，次160MHz信道用于传输EHT TB PPDU。用户信息列表字段中的其他用户信息字段(同特殊用户字段长度相同，但是承载的子字段不同)承载着每个用户单独的信息指示，在此不再赘述。
类似于HE TB PPDU，EHT TB PPDU也包括多个字段，每个字段的含义如表3所示。
表3：EHT TB PPDU中字段含义列表
Figure PCTCN2022087249-appb-000003
Figure PCTCN2022087249-appb-000004
其中，在EHT TB PPDU的U-SIG中，同样存在带宽字段。也就是说，AP向STA指示STA发送TB PPDU的带宽，STA根据所指示的带宽发送TB PPDU，并且在TB PPDU中携带带宽信息。EHT TB PPDU中U-SIG字段的带宽字段携带的TB PPDU的带宽值，与触发帧中指示的PPDU的带宽值相同。EHT TB PPDU中U-SIG字段的内容表4所示。其中，U-SIG字段的带宽字段通过3bit直接指示PPDU的带宽，触发帧通过2bit+2bit(例如表2所示的上行带宽字段的2bit和上行带宽扩展字段的2bit)联合指示。
表4：EHT TB PPDU中U-SIG字段的内容列表
Figure PCTCN2022087249-appb-000005
Figure PCTCN2022087249-appb-000006
其中，表4所示的EHT TB PPDU中U-SIG字段的第二个符号的前两个比特B0-B1用于指示PPDU类型和压缩模式。其具体含义如表5所示。
表5：EHT TB PPDU中U-SIG字段的上行或下行字段和PPDU类型和压缩模式字段列表
Figure PCTCN2022087249-appb-000007
Figure PCTCN2022087249-appb-000008
其中，802.11be标准有两个版本，第一个版本只涉及一些基本特性，第二个版本会进一步涉及一些其他待定的特性。为了区分两个版本的设备，将第一个版本的设备称之为实现了EHT基本特性的设备。将第二个版本的设备称之为非实现了EHT基本特性的设备(也可以称作实现了EHT进阶特性的设备)。其中，实现了EHT基本特性的设备具有支持320MHz信道，支持多RU等特性，但是不支持A-PPDU。非实现了EHT基本特性的设备具有支持A-PPDU，AP协作等特性。
另外，表4中不同字段的保留比特(也称为未用比特)的状态分为两种，分别为不理会(Disregard)和证实(Validate)。如果一个实现了EHT基本特性的设备发现一个PPDU内的证实比特没有设置成标准中规定的默认(缺省)值或者某些子字段的值被设置成证实状态，则终止该PPDU的接收。而对于不理会比特，或者被设置成不理会状态的子字段，如果一个EHT设备没有发现证实比特没有设置成标准中规定的默认(缺省)值或者某些子字段的值被设置成证实状态，则会忽略不理会比特，或者忽略某个被设置成不理会状态的子字段，继续读取其他字段。
图5为本申请实施例提供的一种带宽指示方法的流程示意图。该带宽指示方法由接入点和站点之间的交互实现，包括以下步骤：
501，接入点生成指示信息，指示信息用于指示多个基于触发的物理层协议数据单元TB PPDU的带宽信息；
502，接入点向站点发送指示信息；对应的，站点接收来自接入点的指示信息；
503，站点确定该站点对应的TB PPDU的带宽信息，并在该站点对应的TB PPDU的带宽上向接入点发送TB PPDU。
AP和STA在数据通信时，可以根据信道的状况选择不同的PPDU带宽进行传输。例如，AP向STA指示的TB PPDU的带宽信息，表示AP指示STA通过指定带宽向AP发送上行数据。也就是说，AP向STA指示的TB PPDU的带宽信息包括AP向STA指示的用于传输TB PPDU的带宽，也可以包括STA所分配到的传输资源单元等信息。其中，用于传输TB PPDU的带宽可以理解为TB PPDU的传输带宽或者工作带宽。例如，AP向STA发送的指示信息用于指示STA发送EHT TB PPDU的带宽，以及指示STA该发送带宽上具体发送该EHT TB PPDU所使用的资源单元。
本实施例中指示信息用于指示多个TB PPDU的带宽信息，包括以下两类情况：
情况一：指示信息用于指示两个TB PPDU的带宽信息。其中，两个TB PPDU包括以下 几种组合中的任意一种：两个HE TB PPDU、两个EHT TB PPDU、两个EHT+TB PPDU、一个EHT PB PPDU和一个EHT+TB PPDU。
情况二：指示信息用于指示三个及以上TB PPDU的带宽信息。其中，三个及以上TB PPDU包括HE TB PPDU、EHT TB PPDU、EHT+TB PPDU中的一种或多种。
为了使得指示信息可以指示情况一或情况二中的任意一种TB PPDU的组合，本实施例中的指示信息用于指示以下信息中的至少一种：TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元(trigger based aggregate PHY protocol data unit，TB A-PPDU)的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合。其中，指示信息承载于触发帧中。也就是说，接入点生成指示信息，也表示接入点生成触发帧，触发帧承载指示信息。
一种可能的实现方式中，指示信息用于指示TB PPDU的带宽信息。例如，图2中的AP1生成触发帧，并向STA1发送触发帧。该触发帧承载的指示信息用于指示STA1向AP1发送TB PPDU的带宽。也就是说，该指示信息用于指示单个PPDU的带宽信息。其中，该触发帧还可以指示STA发送TB PPDU所使用的资源单元，在此不再赘述。
又一种可能的实现方式中，指示信息用于指示基于TB A-PPDU的聚合带宽信息。例如，图2中的AP1生成触发帧，并向STA1和STA2发送触发帧。该触发帧承载的指示信息用于指示STA1和STA2分别向AP1发送TB PPDU的聚合带宽。
再一种可能的实现方式中，指示信息用于指示TB A-PPDU中各个PPDU的带宽组合信息。例如，图2中的AP1生成触发帧，并向STA1和STA2发送触发帧。该触发帧承载的指示信息用于指示STA1和STA2分别占用多大的带宽向AP1发送TB PPDU。也就是说，该触发帧承载的指示信息分别指示STA1和STA2发送TB PPDU各自对应的传输带宽。
下面对上述三种实现方式的具体实施步骤进行详细的描述。
在一种示例中，指示信息的数量为多个，指示信息承载于聚合触发帧中。其中，聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。例如，指示信息用于指示上述情况一中的两个HE TB PPDU的带宽信息时，该指示信息承载于聚合触发帧中。该聚合触发帧包括两个触发帧(如图6中的触发帧1和触发帧2)，两个触发帧分别指示两个HE TB PPDU的带宽信息，如图6所示。STA根据触发帧1指示的HE TB PPDU1的带宽信息，在对应的带宽上发送TB PPDU 1。类似的，STA根据触发帧2指示的HE TB PPDU 2的带宽信息，在对应的带宽上发送TB PPDU 2。
其中，STA在所停靠的信道位置或频率范围上接收指示信息，所停靠的信道位置或频率范围是AP与STA提前协商的。当信道带宽的划分粒度为80MHz时，STA依靠所停靠的80MHz子块(80MHz sub-block)的位置或者频率范围，获取AP向STA指示的TB PPDU的带宽。
例如，图2中的STA1和STA2，分别停靠在如图3所示的UNII 5的第一个和第二个80MHz信道上。图2中的AP1发送聚合触发帧，该聚合触发帧包括触发帧1和触发帧2。其中，触发帧1和触发帧2分别位于UNII5中的第一个和第二个80MHz信道上。STA1接收到触发帧1，触发帧1承载的带宽指示信息指示STA1的TB PPDU的带宽为80MHz。STA1在所停靠的第一个80MHz信道上发送带宽为80MHz的TB PPDU 1。STA2接收到触发帧2，触发帧2承载的带宽指示信息指示STA2的TB PPDU的带宽为80MHz。STA2在所停靠的第二个80MHz信道上发送带宽为80MHz的TB PPDU 2。
又例如，图2中的STA1为多个设备(假设为三个STA1)。这三个STA1分别停靠在UNII-5中的第一个、第二个和第四个80MHz信道上。AP1发送聚合触发帧，该聚合触发帧包括触发帧1-3。其中，触发帧1和触发帧2分别位于UNII-5中的第一个和第二个80MHz信道上。触 发帧3位于第三个和第四个80MHz组成的160MHz信道上。或者，触发帧3在UNII-5中第三个和第四个80MHz信道上复制传输。第一个STA1接收到触发帧1，触发帧1承载的带宽指示信息指示TB PPDU的带宽为80MHz。第一个STA1具备发送带宽为80MHz的TB PPDU的能力，第一个STA1在所停靠的第一个80MHz信道上发送带宽为80MHz的TB PPDU 1。第二个STA1接收到触发帧2，触发帧2承载的带宽指示信息指示TB PPDU的带宽为80MHz。第二个STA1具备发送带宽为80MHz的TB PPDU的能力，第二个STA1在所停靠的第二个80MHz信道上发送带宽为80MHz的TB PPDU 2。第三个STA1接收到触发帧3，触发帧3承载的带宽指示信息指示TB PPDU的带宽为160MHz。第三个STA1具备发送带宽为160MHz的TB PPDU的能力，第三个STA1在所停靠的160MHz信道上发送带宽为160MHz的TB PPDU 3。可以理解的是，由于第三个STA1停靠在第四个80MHz信道上，并且第三个STA1接收触发帧3承载的带宽指示信息指示TB PPDU的带宽为160MHz，第三个STA1也具备发送带宽为160MHz的TB PPDU的能力。基于此，停靠在第四个80MHz可以视为停靠在160MHz信道上，故第三个STA1可以在所停靠的160Mhz的信道上发送带宽160MHz的TB PPDU 3。
第一种实现方式中，当触发帧用于调度情况一的TB PPDU的组合时，AP和STA的传输流程如图7a所示。示例性的，图7a所示的情况一的TB PPDU的组合为两个EHT TB PPDU的组合。图7a包括了EHT TB PPDU的格式。其中，EHT TB PPDU包括多个字段，每个字段的含义如表3所示。第二种实现方式中，当触发帧用于调度情况二的TB PPDU的组合时，AP和STA的传输流程如图7b所示。示例性的，图7b所示的情况二的TB PPDU的组合为两个HE TB PPDU和一个EHT TB PPDU的组合。图7b包括了HE TB PPDU和EHT TB PPDU的格式。其中，HE TB PPDU包括多个字段，每个字段的含义如表1所示。EHT TB PPDU也包括多个字段，每个字段的含义如表3所示。
具体的，AP通过触发帧调度情况1或情况2所述的TB PPDU的组合时，可以通过如下方式：AP生成聚合触发帧，该聚合触发帧用于指示多个TB A-PPDU的带宽信息。例如，图7a中的AP1生成聚合触发帧，该聚合触发帧用于指示STA1发送TB PPDU 1的带宽，以及指示STA2发送TB PPDU 2的带宽。又例如，图7b中的AP1生成聚合触发帧，该聚合触发帧用于指示STA1发送TB PPDU 1的带宽、STA2发送TB PPDU 2的带宽以及STA3发送TB PPDU 3的带宽。其中，该聚合触发帧还可以指示STA发送TB PPDU的资源单元，在此不再赘述。其中，图7a所示的聚合触发帧以及A-PPDU的结构如图8a所示。类似的，图7b所示的聚合触发帧以及A-PPDU的结构如图8b所示。可见，聚合触发帧可以指示聚合PPDU的信息。
进一步的，AP向多个STA发送聚合触发帧。对应的，多个STA分别接收聚合触发帧。例如，STA1获取聚合触发帧中针对STA1的指示信息，该指示信息用于指示STA1在指定的带宽1上发送EHT TB PPDU 1。STA2获取聚合触发帧中针对STA2的指示信息，该指示信息用于指示STA2在指定的带宽2上发送EHT TB PPDU2。
其中，触发帧中如何携带带宽指示信息可以包括以下几种实现方式：一种实现方式中，带宽信息通过上行带宽字段和上行带宽扩展字段中的至少一种来指示。进一步的，带宽信息通过上行带宽字段的部分或者全部比特来指示。或者，带宽信息通过上行带宽字段和上行带宽扩展字段的部分或者全部比特来指示。
另一种实现方式中，带宽信息通过以下至少一种字段来指示：公共信息字段的上行高效预留字段、公共信息字段的预留字段、特殊用户信息字段的上行通用信令预留字段、特殊用户信息字段的预留字段。进一步的，带宽信息通过上述预留字段的部分或者全部比特来指示。 具体的，指示信息通过以下比特位中的部分或者全部比特来指示：
公共信息字段中的b56-b62(即上行HE-SIG-A2预留字段的后7比特)、b63(即预留字段的预留比特)，如图4所示。
特殊用户信息列表字段中的b25-b36(即上行U-SIG字段预留指示的全部比特)、b37-b39(即预留字段的预留比特)，如图4所示。
应注意，本实施例所述的预留比特为标准中暂未使用的比特。若采用上述预留比特来指示带宽信息后，被采用的预留比特将不再被称为预留比特。
针对上述带宽信息通过上行带宽字段和上行带宽扩展字段中的至少一个字段的部分或者全部比特指示的实现方式，触发帧中的带宽信息指示可以指示以下信息中的至少一种：TB PPDU的带宽信息、TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合。利用上行带宽字段和上行带宽扩展字段中的至少一种字段的部分或者全部比特进行带宽指示时具体可以包括如下几种实现方式：
一种可能的实现方式中，上行带宽字段和上行带宽扩展字段中的至少一个字段的部分或者全部比特指示各个TB PPDU的带宽。例如，图8a中的触发帧1的上行带宽字段和上行带宽扩展字段用于指示STA1的TB PPDU 1的带宽信息，触发帧2的上行带宽字段和上行带宽扩展字段用于指示STA2的TB PPDU 2的带宽信息。其中，STA1在所停靠的80MHz信道上接收聚合触发帧中的触发帧1。STA1根据触发帧1中的上行带宽字段的取值(例如取值为2)和上行带宽扩展字段的取值(例如取值为0)，确定STA1传输EHT TB PPDU的带宽为80MHz。类似的，STA2在所停靠的80MHz信道上接收聚合触发帧中的触发帧2。STA2根据触发帧2中的上行带宽字段的取值(例如取值为2)和上行带宽扩展字段的取值(例如取值为0)，确定STA2传输EHT TB PPDU的带宽为80MHz。
又例如，图8b中的聚合触发帧(包括三个触发帧TF1、TF2和TF3)采用上行带宽字段进行带宽指示，或者采用上行带宽字段和上行带宽扩展字段进行带宽指示，如表6所示。其中，上行带宽字段通过2bit指示，上行带宽扩展字段通过2bit指示，与表2类似。可选的，还可以进一步包括触发帧的标识，触发帧的标识与该触发帧的上行带宽字段和上行带宽扩展字段相关联。表6中还包括对上行带宽字段和上行带宽扩展字段所指示的带宽组合的说明。
表6：聚合触发帧的带宽指示列表
Figure PCTCN2022087249-appb-000009
Figure PCTCN2022087249-appb-000010
其中，根据表6中的上行带宽字段和上行带宽扩展字段，以及触发帧的标识，各个站点可以分别确定发送TB PPDU的带宽。例如，STA1在所停靠的160MHz信道上接收该聚合触发帧，并从聚合触发帧中获取STA1对应的触发帧1。STA1根据触发帧1的标识，从表6中获取TF1指示的多种带宽信息。STA1再根据TF1的上行带宽字段的取值(例如取值为3)，确定STA1传输HE TB PPDU的带宽为160MHz。类似的，STA2和STA3也采用上述方法确定传输TB PPDU的带宽，在此不再赘述。其中，在上述两种实现方式中，当AP只调度STA传输HE TB PPDU时，AP向STA发送的触发帧只包括上行带宽字段。应注意，AP和STA也可以预先存储表6。当STA获取触发帧后，可以通过查询表6获取该触发帧指示的带宽。
可以理解的是，若带宽的划分粒度为20MHz或40MHz，表6中指示带宽为20MHz或40MHz的行也可以加上触发帧的标识。具体实施方式可参考前述80M的方式，示例性的，当带宽的划分粒度为20MHz时，触发帧用于指示单个TB PPDU的带宽为20MHz。表6的第2行至第5行可以加上该触发帧的标识。
其中，表6中的上行带宽字段和上行带宽扩展字段所指示的带宽可以包括以下几种情况：
示例1：当触发帧中上行带宽字段的比特值为0且上行带宽扩展字段的比特值为0时，该触发帧用于指示只有HE TB PPDU，HE TB PPDU的带宽为20MHz。或者，该触发帧用于指示只有EHT TB PPDU，EHT TB PPDU的带宽为20MHz。
示例2：当触发帧中上行带宽字段的比特值为1且上行带宽扩展字段的比特值为0时，该触发帧用于指示只有HE TB PPDU，HE TB PPDU的带宽为40MHz。或者，该触发帧用于指示只有EHT TB PPDU，EHT TB PPDU的带宽为40MHz。
示例3：当触发帧中上行带宽字段的比特值为2且上行带宽扩展字段的比特值为0时，该触发帧用于指示只有HE TB PPDU，HE TB PPDU的带宽为80MHz。或者，该触发帧用于指示只有EHT TB PPDU，EHT TB PPDU的带宽为80MHz。
示例4：当触发帧中上行带宽字段的比特值为2且上行带宽扩展字段的比特值为1时，该触发帧用于指示HE TB PPDU和EHT TB PPDU。HE TB PPDU的带宽为80MHz，EHT TB PPDU的带宽为160MHz。
示例5：当触发帧中上行带宽字段的比特值为3且上行带宽扩展字段的比特值为0时，该触发帧用于指示HE TB PPDU和EHT TB PPDU。HE TB PPDU的带宽为160MHz，EHT TB PPDU的带宽为80MHz。
示例6：当触发帧中上行带宽字段的比特值为3且上行带宽扩展字段的比特值为1时，该触发帧用于指示只有HE TB PPDU，HE TB PPDU的带宽为160MHz。或者，该触发帧用于指示只有EHT TB PPDU，EHT TB PPDU的带宽为160MHz。或者，该触发帧用于指示HE TB PPDU和EHT TB PPDU，HE TB PPDU的带宽为160MHz，EHT TB PPDU的带宽为160MHz。
示例7：当触发帧中上行带宽字段的比特值为3且上行带宽扩展字段的比特值为2时，该触发帧用于指示只有EHT TB PPDU，EHT TB PPDU的带宽为320MHz-1。
示例8：当触发帧中上行带宽字段的比特值为3且上行带宽扩展字段的比特值为3时，该触发帧用于指示只有EHT TB PPDU，EHT TB PPDU的带宽为320MHz-2。
需要说明的是，上述示例1-8仅仅是一种举例而非限定，当触发帧中上行带宽字段的比特值和上行带宽扩展字段的比特值为相应取值时，具体指示的TB PPDU的组合以及带宽可以互换。例如，当触发帧中上行带宽字段的比特值为3且上行带宽扩展字段的比特值为3时，该触发帧可以用于指示只有EHT TB PPDU，EHT TB PPDU的带宽为320MHz-1。
又一种可能的实现方式中，触发帧中的上行带宽字段和上行带宽扩展字段中的至少一个字段的部分或者全部比特用于指示基于TB A-PPDU的聚合带宽信息。例如，HE TB PPDU的聚合带宽只需要2bit来指示。例如，2bit的值(十进制的值)为0表示160MHz，2bit的值为1表示320MHz-1，2bit的值为2表示320MHz-2。或者，若不区分320Mhz-1和320MHz-2，PPDU带宽只需要1bit来指示。
例如，如图8a所示的聚合触发帧包括触发帧1和触发帧2。触发帧1的上行带宽字段和上行带宽扩展字段指示聚合带宽为160MHz。STA1在所停靠的80MHz信道上接收该聚合触发帧中的触发帧1，并根据触发帧1中的上行带宽字段的取值和上行带宽扩展字段的取值，确定聚合带宽为160MHz。进一步，STA1根据触发帧1中的资源单元字段确定STA1传输EHT TB PPDU的带宽为该160MHz聚合带宽中的指定信道位置的80MHz带宽。类似的，STA2在所停靠的80MHz带宽上接收该聚合触发帧中的触发帧2，并根据触发帧2中的上行带宽字段的取值和上行带宽扩展字段的取值，确定聚合带宽为160MHz。进一步，STA2根据触发帧2所指示的RU确定STA2传输EHT TB PPDU的带宽为该160MHz聚合带宽中的指定信道位置的80MHz带宽。
进一步的，触发帧中的公共信息字段和特殊用户信息字段还用于指示聚合带宽信息中除聚合带宽外的其他信息(如物理层版本标识等)。例如，针对触发帧指示基于TB A-PPDU的聚合带宽信息的情况，每个触发帧的公共信息字段的b54用于指示该TB PPDU是否为HE TB PPDU。若b54指示1，则该TB PPDU为HE TB PPDU；若b54指示0，则该TB PPDU为EHT PPDU。又例如，b54指示主160MHz内传输的可以是HE TB PPDU、EHT TB PPDU、EHT+TB PPDU中的任意一种类型。公共信息字段的b55用于指示是否存在特殊用户字段。可选的，公共信息字段的其他预留比特还用于分别指示每个TB PPDU的类型，或者分别指示每一个80MHz带宽传输的PPDU是哪一种PPDU类型。例如，是HE TB PPDU还是EHT TB PPDU等。其中，EHT TB PPDU、EHT+TB PPDU可以视为同一类型的PPDU，可以进一步通过物理层版本标识去区分。例如，指示传输的EHT TB PPDU为EHT TB PPDU、EHT+TB PPDU、EHT++TB PPDU等(这里只是一种标准版本举例，具体的标号以及表示方式本实施例不做限制)。在相应的EHT TB PPDU、EHT+TB PPDU中，目标STA按照触发帧所指示的带宽在所发送的EHTTB PPDU或EHT+TB PPDU的U-SIG中进行带宽指示。
可见，当触发帧用于指示基于TB A-PPDU的聚合带宽信息时，非实现了EHT基本特性的设备可以获知TB A-PPDU的聚合带宽。非实现了EHT基本特性的设备可以针对TB  A-PPDU进行空间复用操作的优化。有利于非实现了EHT基本特性的设备进行空间复用传输，或者防止对当前传输造成干扰。
再一种实现方式中，触发帧中的上行带宽字段和上行带宽扩展字段中的至少一个字段的部分或者全部比特用于指示TB A-PPDU中各个PPDU的带宽组合信息。例如，聚合触发帧的上行带宽字段和上行带宽扩展字段(共4bit)最多能够指示16种带宽组合。当指示如表7所示的五种带宽组合时，只需要利用上行带宽字段和上行带宽扩展字段中的3bit。其中，比特值换算成十进制的值可以作为带宽组合的标识。例如，当聚合触发帧的上行带宽字段的取值为0且上行带宽扩展字段的取值也为0时，该聚合触发帧指示的带宽组合的标识为0，即指示的带宽组合为80MHz-80MHz-80MHz-80MHz。
示例性的，利用这种方法，本实施例可以实现如表7所示的几种带宽组合。其中，表7所示的带宽组合以80MHz为粒度分为多个带宽组合，还可以以其他带宽(如40MHz等更小的带宽)为粒度，本实施例不作限定。其中，当触发帧用于指示TB A-PPDU中各个PPDU的带宽组合信息时，触发帧可以不携带单个PPDU的带宽，或者不携带聚合带宽，或者不携带单个PPDU的带宽和聚合带宽。STA通过PPDU带宽组合信息和其所停靠的信道在整个聚合带宽内的位置，就可以确定该STA发送TB PPDU的带宽。例如，聚合触发帧指示的带宽组合为80MHz-80MHz-160MHz。STA1位于频率由低到高的第二个80MHz上，则STA1根据自身所停靠的信道和触发帧所指示的带宽组合，确定PPDU带宽为80MHz。若STA1位于频率由低到高第三个或者第四个80MHz上，则确定PPDU带宽为80MHz或160MHz。
可选的，指示信息还可以进一步包括聚合带宽信息，结合带宽组合信息和聚合带宽信息得到具体的带宽指示。例如，当聚合带宽为160MHz，触发帧指示的带宽组合的标识为4，可以得到具体的带宽组合为80M-80M。在这种情况下，触发帧可以仅指示聚合带宽为160MHz，而不需要进一步指示带宽组合，也可以确定具体的带宽组合为80M-80M。当聚合带宽为320MHz时，触发帧指示的带宽组合的标识为0-3的任意一种。
表7：TB A-PPDU的带宽组合列表
Figure PCTCN2022087249-appb-000011
可见，当触发帧用于指示TB A-PPDU中各个PPDU的带宽组合信息时，这种指示方式可以支持最灵活的组合。例如，表7中包括了5种灵活的带宽组合。带宽组合也示出了TB A-PPDU的聚合带宽，以及各个TB PPDU的带宽，包含了最大的信息量。
另外，针对带宽信息通过公共信息字段的上行高效预留字段、公共信息字段的预留字段、特殊用户信息字段的上行通用信令预留字段、特殊用户信息字段的预留字段的至少一种字段来指示的实现方式，由于触发帧中的带宽信息指示可以指示以下信息中的至少一种：TB PPDU的带宽信息、TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合。利用上述方式进行带宽指示时具体可以包括如下几种实现方式：
一种可能的实现方式中，触发帧中的公共信息字段和特殊用户信息字段至少一个字段中 的预留比特的部分或全部比特用于指示各个TB PPDU的带宽。例如，聚合触发帧包括多个触发帧，每个触发帧都有各自的公共信息字段和特殊用户字段，分别指示相应站点的PPDU带宽。示例性的，聚合触发帧中每个触发帧的公共信息字段b56-b62中的b56和b57用于指示TB PPDU的带宽信息。比如b56和b57的取值为0指示80MHz，取值为1指示160MHz，取值为2指示320MHz。STA接收对应的触发帧，读取对应的触发帧的公共信息字段中的b56和b57的取值，从而获取AP向该STA所指示的传输TB PPDU的带宽。
又一种可能的实现方式，触发帧中的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特用于指示基于TB A-PPDU的聚合带宽信息。例如，聚合触发帧的特殊用户信息字段中存在3个预留比特(即b37-b39)，缺省值为0。可选的，b37和b38两个比特的取值可用于指示聚合带宽。示例性的，b37和b38的取值为0表示聚合带宽为160MHz，取值为1表示聚合带宽为320MHz。又例如，b37和b38的取值为00(缺省值)表示非A-PPDU，b37和b38的取值为01表示聚合带宽为160MHz，b37和b38的取值为10表示聚合带宽为320MHz，b37和b38的取值为11为预留。需要说明的是，上述取值对应的含义仅是举例，不同取值对应的含义可以互换，本申请不做限制。
再一种实现方式中，触发帧中的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特用于指示TB A-PPDU中各个PPDU的带宽组合信息。例如，聚合触发帧的特殊用户信息字段中存在三个预留比特(即b37-b39)，该三个预留比特最多能够指示8种带宽组合。当b37的取值为0，b38的取值为1，b39的取值为0(即该三个预留比特的十进制取值为2)时，b37-b39所指示的带宽组合为160MHz-80MHz-80MHz。其中，TB A-PPDU中各个PPDU的带宽组合信息可参考表7，在此不再赘述。
进一步的，带宽信息还可以结合上行带宽字段和上行带宽扩展字段中的至少一个字段，以及公共信息字段和特殊用户信息字段中的至少一个字段进行联合指示。例如，触发帧的上行带宽字段和上行带宽扩展字段中至少一个字段的部分或全部比特指示一种带宽信息，公共信息字段和特殊用户信息字段中至少一个字段的预留比特的部分或全部比特指示另一种带宽信息。
具体的，在一种实现方式中，触发帧的上行带宽字段和上行带宽扩展字段中至少一个字段的部分或者全部比特用于指示TB PPDU的带宽，公共信息字段和特殊用户信息字段中至少一个字段的预留比特的部分或者全部比特用于指示A-PPDU的聚合带宽。例如，触发帧的公共信息字段中上行HE-SIG-A2字段的部分或全部比特预留比特用于指示聚合带宽。其中，预留比特的取值为0指示聚合带宽为160MHz，取值为1指示聚合带宽为320MHz。另外，触发帧的预留字段中的缺省状态用于表示单个PPDU，即非A-PPDU情况。例如，触发帧的公共信息字段中上行HE-SIG-A2预留比特的缺省值(预留值)为1。两个预留比特的缺省值11表示该触发帧指示的非A-PPDU，00表示该触发帧指示的聚合带宽为160MHz，01表示该触发帧指示的聚合带宽为320MHz，10为预留。可选的，该实现方式中的字段所指示的具体带宽信息可以交换位置。也就是说，触发帧的上行带宽字段和上行带宽扩展字段中至少一个字段的部分或者全部比特可以用于指示A-PPDU的聚合带宽，而公共信息字段和特殊用户信息字段中至少一个字段的预留比特的部分或者全部比特用于指示TB PPDU的带宽。或者，触发帧的上行带宽字段的部分或者全部比特用于指示A-PPDU的聚合带宽，并且触发帧的预留比特的部分或者全部比特用于指示TB PPDU的带宽。具体实现方式以及示例，可以参考前文实施例中对应的描述，在此不再赘述。
又一种实现方式中，触发帧的上行带宽字段和上行带宽扩展字段中至少一个字段的部分 或者全部比特用于指示TB A-PPDU中各个PPDU的带宽组合信息，公共信息字段和特殊用户信息字段中至少一个字段的预留比特的部分或者全部比特用于指示TB PPDU的带宽。可选的，该实现方式中的字段所指示的具体带宽信息也可以交换位置。也就是说，触发帧的上行带宽字段和上行带宽扩展字段中至少一个字段的部分或者全部比特可以用于指示TB PPDU的带宽，而公共信息字段和特殊用户信息字段中至少一个字段的预留比特的部分或者全部比特用于指示TB A-PPDU中各个PPDU的带宽组合信息。具体实现方式以及示例，可以参考前文实施例中对应的描述，在此不再赘述。
再一种实现方式中，触发帧的上行带宽字段和上行带宽扩展字段中至少一个字段的部分或者全部比特用于指示A-PPDU的聚合带宽，公共信息字段和特殊用户信息字段中至少一个字段的预留比特的部分或者全部预留比特用于指示TB A-PPDU中各个PPDU的带宽组合信息。可选的，该实现方式中的字段所指示的具体带宽信息也可以交换位置。也就是说，触发帧的上行带宽字段和上行带宽扩展字段中至少一个字段的部分或者全部比特可以用于指示TB A-PPDU中各个PPDU的带宽组合信息，而公共信息字段和特殊用户信息字段中至少一个字段的预留比特的部分或者全部预留比特用于指示A-PPDU的聚合带宽。具体实现方式以及示例，可以参考前文实施例中对应的描述，在此不再赘述。
另一种示例中，指示信息的数量为多个，指示信息承载于一个触发帧或者多个触发帧中。其中，多个触发帧为同一触发帧在不同频域范围内复制得到的。本示例中指示TB A-PPDU的带宽的触发帧分为两种情况：只有一个触发帧，或者同一触发帧在TB A-PPDU带宽中的不同频域范围内进行复制传输。例如，图9为本申请实施例提供的一种同一触发帧在不同的80MHz内进行复制传输的示意图。其中，图9中的多个触发帧为同一触发帧在整个320MHz内均分的4个80MHz中复制得到的，即触发帧1-4的内容都相同。对应的，触发帧1-4所指示的TB PPDU的带宽也相同，如图9所示。该示例适用于触发帧在TB A-PPDU的带宽复制的场景。例如，该示例适用于802.11标准的非高吞吐率PPDU要求在整个带宽上复制的场景。其中，非高吞吐率PPDU能够提供更好的传输机会的保护，减少干扰。其中，本示例还包括只有一个触发帧在整个带宽内传输的场景，这一个触发帧也能够指示聚合TB PPDU。
第一种实现方式中，触发帧中的上行带宽字段和上行带宽扩展字段中的至少一个字段的部分或者全部比特用于指示各个TB PPDU的带宽。可选的，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特用于指示各个TB PPDU的带宽。
第二种实现方式中，触发帧中的上行带宽字段和上行带宽扩展字段中的至少一个字段的部分或者全部比特用于指示基于TB A-PPDU的聚合带宽信息。可选的，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特用于指示基于TB A-PPDU的聚合带宽信息。
第三种实现方式中，触发帧中的上行带宽字段和上行带宽扩展字段中的至少一个字段的部分或者全部比特用于指示基于TB A-PPDU的带宽组合。可选的，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特用于指示基于TB A-PPDU的带宽组合。上述三种实现方式的具体实施步骤可以参考前文实施例中相关的描述，在此不再赘述。应注意，上述三种实现方式中所有EHTTB PPDU或EHT+TB PPDU的带宽相同。
第四种实现方式中，触发帧的上行带宽字段和上行带宽扩展字段中的至少一个字段的部分或者全部比特用于指示基于TB A-PPDU的聚合带宽信息，并且触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特用于指示各个TB PPDU的 带宽信息。例如，以80MHz为粒度将整个带宽320MHz进行划分，则TB A-PPDU中的TB PPDU可以有两种带宽80MHz或160MHz。当每一个TB PPDU的带宽为80MHz时(即划分为四段TB PPDU的带宽)，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分比特(例如图6所示的特殊用户信息字段的上行U-SIG预留比特b25-b36中的4个比特)用于指示每一个TB PPDU的带宽。或者，触发帧的预留比特中的3个比特用于指示每一个TB PPDU的带宽(最后一个TB PPDU的带宽等于聚合带宽减去前边几个已指示的带宽)。
可选的，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特用于指示各个TB PPDU的带宽时，STA通过将各个TB PPDU带宽求和，判断求和的值是否等于TB A-PPDU的聚合带宽，从而确定TB PPDU的个数。例如，触发帧指示的聚合带宽为320MHz，TB PPDU1的带宽为160MHz，TB PPDU2的带宽是160MHz，则STA确定整个带宽中存在2个TB PPDU。又例如，触发帧指示的聚合带宽为320MHz，TB PPDU1的带宽是160MHz，TB PPDU2的带宽是80MHz，TB PPDU3的带宽是80MHz，则STA确定整个带宽中存在3个PPDU。其中，每个TB PPDU带宽指示所需要的比特数和各个条目的相对顺序，本实施例不作限定。
可选的，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特用于指示TB PPDU的个数。例如，触发帧的预留比特中的2个比特用于指示TB PPDU的个数。缺省值(取值为0)表示1个，其他值(取值为1、2、3)表示2-4个。上述举例仅为示例，不作限定。
第五种实现方式中，触发帧的上行带宽字段和上行带宽扩展字段中的至少一个字段的部分或者全部比特用于指示A-PPDU的聚合带宽，并且触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特用于指示TB A-PPDU中各个PPDU的带宽组合的标识。例如，AP和STA都预先获取如表7所示的TB A-PPDU的带宽组合。AP向STA发送的触发帧的特殊用户信息字段的部分预留比特(例如图6所示的特殊用户信息字段的上行U-SIG预留比特b25-b36中的3个比特)用于指示表7中的带宽组合的标识0-4。
第六种实现方式中，触发帧的上行带宽字段(2bit)和上行带宽扩展字段(上行带宽扩展字段加入1bit，扩充为3bit)用于指示TB A-PPDU中各个PPDU的带宽组合信息。例如，表8为本申请实施例提供的另一种上行带宽字段和上行带宽扩展字段的列表。相较于表2，表8中的上行带宽扩展字段通过3bit来表示，从而指示更多的带宽组合。额外扩展的比特可以来自于触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特。
表8：上行带宽字段和上行带宽扩展字段指示A-PPDU的带宽组合列表
Figure PCTCN2022087249-appb-000012
Figure PCTCN2022087249-appb-000013
可见，表8所示的上行带宽字段和上行带宽扩展字段能够指示整个320MHz带宽下所有可能的组合(表8中的预留还可以指示其他粒度划分情况下的多个组合带宽)。其中，表8可以用来指示不包括HE TB PPDU，只包括EHT TB PPDU、EHT+TB PPDU中的至少一种的情况。例如，表8中EHT TB PPDU的带宽这一列，只有一个数字(例如第2行)表示只有一个EHT TB PPDU或EHT+TB PPDU。A-B(例如第23行)表示两个EHT TB PPDU或EHT+TB PPDU的组合。A-B-C(例如第25行)表示三个EHT TB PPDU或EHT+TB PPDU的组合。A-B-C-D(例如第24行)表示四个EHT TB PPDU或EHT+TB PPDU的组合。
可选的，上述表8中的一些条目的部分或者全部被合并为一行，从而保留更多预留比特。例如，当所有TB PPDU的带宽相同时，表8中的第18行、第23行和第24行所指示的带宽组合实际上为同一个带宽组合80-80-80-80。则表8中的第18行、第23行和第24行被合并为一行。又例如，当所有TB PPDU的带宽相同时，表8中的第27行和第31行所指示的带宽组合实际上为同一个带宽组合160-160。则表8中的第18行、第23行和第24行被合并为一行。可见，合并后的表8可以保留更多预留比特，从而指示更多可能的带宽组合情况。
可选的，基于前文实施例中的表2，AP选取表2中的一个预留条目指示A-PPDU扩展。例如，表9为对表2中的一个预留条目重定义后的上行带宽字段和上行带宽扩展字段。其中， 当上行带宽字段的值为2且上行带宽扩展字段的值为2时，上行带宽字段和上行带宽扩展字段用于指示TB A-PPDU扩展。然后再单独利用其他字段去指示TB A-PPDU中各个PPDU带宽的组合。例如，利用其他字段指示如表7所示的TB A-PPDU的带宽组合。其他字段可以来自于触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或者全部比特。
表9：上行带宽字段和上行带宽扩展字段指示A-PPDU的带宽组合列表
Figure PCTCN2022087249-appb-000014
又一种实现方式中，可以对如图6所示的触发帧的用户信息列表字段进行改进，改进后的用户信息字段包括多个特殊用户信息字段。例如，图10为本申请实施例提供的一种改进的触发帧的结构示意图。在该触发帧的用户信息列表字段中额外增加3个特殊用户信息字段，也就是说，改进后的触发帧的用户信息列表字段中包括4个特殊用户信息字段，如图10所示。其中，一个触发帧就可以同时指示调度4个TB PPDU，每个特殊用户信息字段对应指示所调度的TB PPDU的信息。其中，每一个特殊用户信息字段还用于指示所调度的TB PPDU的U-SIG中所需的公共信息。需要说明的是，上述改进后的触发帧的用户信息列表字段中包括4个特殊用户信息字段仅是举例，不作为限定，用户信息列表字段中可以包括任意个特殊用户信息字段。
可选的，若图10中的b55指示特殊用户字段存在，则触发帧的公共字段去单独指示(比如b56-b57)用于指示特殊用户信息字段的个数。若图10中的预留比特b55指示特殊用户字段存在，触发帧也可以不使用专门的比特来指示特殊用户信息字段的个数。例如，当STA解析触发帧，确定预留比特b55指示特殊用户字段存在，STA可以通过特殊关联标识(AID12)的个数确定特殊用户信息字段的个数。
其中，多个特殊用户字段的特殊关联标识(AID12表示AID中的12低位)都可以设置为2007。例如，AID12＝2007的个数表示特殊用户信息字段的个数。或者，多个特殊用户字段的特殊关联标识设置成不同的AID值。例如，AID12＝2007、2006、2005、2004等(2007-最后一个特殊AID+1表示特殊用户信息字段的个数)。其中，上述AID不被分配给任何一个STA，而是被当作特殊用户字段的标识。
综上所述，AP根据上述多种实现方式生成指示信息后，向STA发送指示信息。对应的，STA接收指示信息。STA确定该STA对应的TB PPDU的带宽信息，并在该STA对应的TB PPDU的带宽上向AP发送TB PPDU。具体的发送流程可以参考现有标准中的相关描述，本实施例不作限定。其中，在STA向AP发送的EHTTB PPDU或EHT+TB PPDU中，包括了STA发送TB PPDU的带宽，TB A-PPDU的聚合带宽，TB A-PPDU中各个PPDU的带宽组合中的一种或多种信息。
进一步的，在一种示例中，STA根据指示信息确定发送TB PPDU的带宽，还根据指示信息确定发送TB PPDU所采用的EHT-LTF序列。其中，EHT-LTF序列主要用于信道估计，通 常通过EHT TB PPDU的U-SIG字段(例如U-SIG字段的带宽字段)来指示EHT-LTF序列。EHT-LTF序列承载于EHT TB PPDU的EHT-LTF字段。
由于OFDM符号是由多个独立经过调制的子载波信号叠加而成，当各个子载波相位相同或者相近时，叠加信号便会受到相同初始相位信号的调制，从而产生较大的瞬时功率峰值，由此带来较高的峰均功率比(peak-to-average power ratio，PAPR)。由于一般的功率放大器的动态范围都是有限的，所以高PAPR的信号极易进入功率放大器的非线性区域，导致信号产生非线性失真，造成明显的频谱扩展干扰以及带内信号畸变，导致整个系统性能严重下降。为了解决高PAPR的问题，802.11be标准根据PPDU带宽的不同，设计了不同的EHT-LTF序列。不同的EHT-LTF序列用于在不同的带宽情况下去优化PAPR。此外，EHT-LTF字段的符号去除保护间隔以后有三种尺寸(3.2微秒，6.4微秒，12.8微秒)，分别被称作1xEHT-LTF、2xEHT-LTF、4x EHT-LTF。其中，所有的EHT-LTF序列都由1、-1、0组成，具体的序列本实施例不作限定。对于非A-PPDU场景，802.11be标准共定义了如表10所示的几类EHT-LTF序列。其中，表10所示的EHT-LTF序列是由EHT TB PPDU的U-SIG字段中的带宽字段(B3-B5)所指示。
表10：一种EHT-LTF序列的列表
Figure PCTCN2022087249-appb-000015
可见，根据表10，当STA确认AP所指示的发送TB PPDU的带宽，STA就能够确定发送TB PPDU所采用的EHT-LTF序列。例如，STA接收指示信息，该指示信息指示STA发送EHT TB PPDU的带宽为80MHz。则STA从表10中确定可选的EHT-LTF序列包括EHT-LTF 80MHz_1x、EHT-LTF 80MHz_2x、EHT-LTF 80MHz_4。其中，在某一带宽下，具体选取1xEHT-LTF、2xEHT-LTF、4x EHT-LTF中的哪一种EHT-LTF序列，取决于传输方式、信道环境等，本实施例不作限定。
第一种实现方式中，STA按照TB A-PPDU的聚合带宽选择EHT-LTF序列。按照该实现方式选择EHT-LTF序列的好处是能够针对聚合带宽优化PAPR。另外，当上行带宽字段和上行带宽扩展字段用于指示TB A-PPDU的聚合带宽时，实现了EHT基本特性的设备能够实现 透明传输。也就是说，实现了EHT基本特性的设备会认为整个聚合带宽内是一个PPDU，或者是HE+EHT TB PPDU，能够对数据进行识别和处理。
第二种实现方式中，STA按照各个TB PPDU的带宽选择EHT-LTF序列。按照该实现方式选择EHT-LTF序列的好处是能够针对非实现了EHT基本特性的设备实现EHT-LTF序列的统一。另外，当上行带宽字段和上行带宽扩展字段用于指示某个PPDU的带宽时，实现了EHT基本特性的设备能够实现透明传输。
第三种实现方式中，STA按照TB A-PPDU中各个TB PPDU的带宽组合选择EHT-LTF序列。按照该实现方式选择EHT-LTF序列的好处是能够进一步优化EHT-LTF序列的PAPR。例如，根据不同的带宽组合，乘以不同的+1或者-1的相位系数，使得每种组合情况下PAPR最优。
第四种实现方式中，STA按照TB A-PPDU的聚合带宽，以及每个80MHz内传输的PPDU的类型选择EHT-LTF序列。按照该实现方式选择EHT-LTF序列时，AP需要进一步指示在每个80MHz内传输的PPDU的类型。例如，STA根据触发帧的公共信息字段中的部分预留比特(如4bit)，每个比特的比特值为0指示HE，比特值为1指示EHT或EHT+。应注意，若A-PPDU中有且仅有一个HE PPDU，而且必须位于主80MHz或者主160MHz信道上，则触发帧无需指示PPDU的类型。若A-PPDU中至多有一个HE PPDU，而且必须位于主80MHz或者主160MHz信道上，那么触发帧只需要指示主80MHz或主160MHz信道上是否为HE PPDU。按照该实现方式选择EHT-LTF序列的好处是能够进一步考虑TB PPDU的类型，以及优化EHT-LTF序列的PAPR。
另一种示例中，AP接收来自站点的TB A-PPDU后，根据TB PPDU的带宽，TB A-PPDU的聚合带宽，TB A-PPDU中各个PPDU的带宽组合中的一种或多种信息选择EHT-LTF序列。其中，AP所选择的EHT-LTF序列用于进行信道估计。例如，理想情况下，数据接收端接收信号后，对于每个子载波都可以利用收到的信号除以已知的序列(如EHT-LTF序列)，即可获得信道值。
第一种实现方式中，AP按照TB A-PPDU的聚合带宽选择EHT-LTF序列。第二种实现方式中，AP按照各个TBPPDU的带宽选择EHT-LTF序列。第三种实现方式中，AP按照TB A-PPDU中各个TB PPDU的带宽组合选择EHT-LTF序列。第四种实现方式中，AP按照TB A-PPDU的聚合带宽，以及每个80MHz内传输的PPDU的类型选择EHT-LTF序列。应注意，第四种实现方式中是按照80MHz为粒度划分PPDU的带宽，还可以按照其他粒度划分，本实施例不作限定。按照该实现方式选择EHT-LTF序列时，AP需要进一步指示在每个80MHz内传输的PPDU的类型。上述四种实现方式的好处以及示例可以参考STA侧对应的四种实现方式中的相关描述，在此不再赘述。
其中，备选的EHT-LTF序列可以参考如表10所示的多种EHT-LTF序列，也可以按照以上特征进一步设计优化EHT-LTF序列。例如，利用如表10所示的多种EHT-LTF序列，以80MHz为粒度，乘以+1或者-1的相位系数，进一步优化PAPR。其中，HE TB PPDU可以存在于TB A-PPDU中，但是为了保证传统HE设备对HE TB PPDU的发送，本实施例不涉及对HE TB PPDU进行改动。
本申请实施例提供一种带宽指示方法，接入点在多个TB PPDU聚合传输时，向多个站点指示多个带宽信息或者指示聚合带宽信息或者指示聚合带宽的组合，有利于接入点调度多个同时发送的TB PPDU，从而更好地利用接入点的大带宽能力。
上文结合图1至图10详细描述了本申请实施例的带宽方法。下面结合图11至图14，详 细描述本申请实施例的带宽指示装置以及相关设备。应理解，图11至图14所示的带宽指示装置及相关设备能够实现图1至图10所示的方法流程中的一个或者多个的步骤。为避免重复，在此不再详细赘述。
图11为本申请实施例提供的一种带宽指示装置的示意图。图11所示的带宽指示装置用于实现上述图1至图10所示的实施例中站点所执行的方法。该带宽指示装置包括收发单元1101和处理单元1102。其中，收发单元1101用于接收来自接入点的指示信息。指示信息用于指示三个及以上TB PPDU的带宽信息。三个及以上TB PPDU包括HE TB PPDU、EHT TB PPDU、演进的EHT TB PPDU中的一种或多种。处理单元1102用于确定站点对应的TB PPDU的带宽信息。
在一种实现方式中，指示信息的数量为多个。指示信息承载于聚合触发帧中。聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。
在一种实现方式中，指示信息的数量为多个。指示信息承载于一个触发帧或者多个触发帧中。多个触发帧为同一触发帧在不同频域范围内复制得到的。
在一种实现方式中，指示信息用于指示TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种。
在一种实现方式中，指示信息承载于触发帧的以下字段的至少一种字段中：第一字段、第二字段。第一字段为触发帧的上行带宽字段，或者上行带宽字段和上行带宽扩展字段。第二字段为触发帧的预留字段。其中，触发帧的预留字段为以下字段的任意一种：公共信息字段的上行高效预留字段、公共信息字段的预留字段、特殊用户信息字段的上行通用信令预留字段、特殊用户信息字段的预留字段。
在一种实现方式中，触发帧的上行带宽字段和上行带宽扩展字段至少一个字段中的部分或者全部比特用于指示上述实现方式中描述的三种带宽信息中的至少一种。
在一种实现方式中，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或全部比特用于指示上述实现方式中描述的三种带宽信息中的至少一种。
在一种实现方式中，一个触发帧包括多个特殊用户字段，每一个特殊用户字段用于指示一个TB PPDU的带宽。
在一种实现方式中，处理单元1102还用于基于指示信息生成极高吞吐率长训练EHT-LTF序列。收发单元1101还用于向接入点发送EHT-LTF序列。
在一种实现方式中，处理单元1102还用于基于指示信息生成EHT-LTF序列，包括：
基于TB PPDU的带宽信息、TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种，生成EHT-LTF序列。
在一种实现方式中，图11中的各个单元所实现的相关功能可以通过收发器和处理器来实现。图12为本申请实施例提供的一种站点的示意图。该站点可以为能够执行本申请实施例提供的带宽指示方法的设备(例如芯片)。其中，站点可以包括收发器1201、至少一个处理器1202和存储器1203。其中，收发器1201、处理器1202和存储器1203可以通过一条或多条通信总线相互连接，也可以通过其它方式相连接。
其中，收发器1201可以用于发送数据，或者接收数据。可以理解的是，收发器1201是统称，可以包括接收器和发送器。例如，接收器用于接收来自接入点的指示信息。又例如，发送器用于向接入点发送TB PPDU。
其中，处理器1202可以用于对站点的数据进行处理。处理器1202可以包括一个或多个 处理器，例如该处理器1202可以是一个或多个中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)，硬件芯片或者其任意组合。在处理器1202是一个CPU的情况下，该CPU可以是单核CPU，也可以是多核CPU。
其中，存储器1203用于存储程序代码等。存储器1203可以包括易失性存储器(volatile memory)，例如随机存取存储器(random access memory，RAM)；存储器1203也可以包括非易失性存储器(non-volatile memory)，例如只读存储器(read-only memory，ROM)，快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)；存储器1203还可以包括上述种类的存储器的组合。
其中，上述处理器1202和存储器1203可以通过接口耦合，也可以集成在一起，本实施例不作限定。
上述收发器1201和处理器1202可以用于执行本申请实施例提供的带宽指示方法，具体实现方式如下：
收发器1201用于接收来自接入点的指示信息。指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息。其中，三个及以上TB PPDU包括HE TB PPDU、EHT TB PPDU、演进的EHT TB PPDU中的一种或多种。处理器1202用于确定站点对应的TB PPDU的带宽信息。收发器1201还用于在站点对应的TB PPDU的带宽上向接入点发送TB PPDU。
在一种实现方式中，指示信息的数量为多个。指示信息承载于聚合触发帧中。聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。
在一种实现方式中，指示信息的数量为多个。指示信息承载于一个触发帧或者多个触发帧中。多个触发帧为同一触发帧在不同频域范围内复制得到的。
在一种实现方式中，指示信息用于指示TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种。
在一种实现方式中，指示信息承载于触发帧的以下字段的至少一种字段中：第一字段、第二字段。第一字段为触发帧的上行带宽字段，或者上行带宽字段和上行带宽扩展字段。第二字段为触发帧的预留字段。其中，触发帧的预留字段为以下字段的任意一种：公共信息字段的上行高效预留字段、公共信息字段的预留字段、特殊用户信息字段的上行通用信令预留字段、特殊用户信息字段的预留字段。
在一种实现方式中，触发帧的上行带宽字段和上行带宽扩展字段至少一个字段中的部分或者全部比特用于指示上述实现方式中描述的三种带宽信息中的至少一种。
在一种实现方式中，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或全部比特用于指示上述实现方式中描述的三种带宽信息中的至少一种。
在一种实现方式中，一个触发帧包括多个特殊用户字段，每一个特殊用户字段用于指示一个TB PPDU的带宽。
在一种实现方式中，处理器1202还用于基于指示信息生成极高吞吐率长训练EHT-LTF序列。收发器1201还用于向接入点发送EHT-LTF序列。
在一种实现方式中，处理器1202还用于基于指示信息生成极高吞吐率长训练EHT-LTF序列，包括：
基于TB PPDU的带宽信息、TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种，生成EHT-LTF序列。
可以理解的是，前述方法实施例都可以援引到如图11和图12的带宽指示装置和站点中，所能实现的有益效果参考前述方法实施例中对应的描述，在此不再赘述。
图13为本申请实施例提供的另一种带宽指示装置的示意图。图13所示的带宽指示装置用于实现上述实施例中接入点所执行的方法。该带宽指示装置包括处理单元1301和收发单元1302。其中，处理单元1301用于生成指示信息。指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息。三个及以上TB PPDU包括HE TB PPDU、EHT TB PPDU、演进的EHT TB PPDU中的一种或多种。收发单元1302用于向站点发送指示信息。
在一种实现方式中，指示信息的数量为多个。指示信息承载于聚合触发帧中。聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。
在一种实现方式中，指示信息的数量为多个。指示信息承载于一个触发帧或者多个触发帧中。多个触发帧为同一触发帧在不同频域范围内复制得到的。
在一种实现方式中，指示信息用于指示TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种。
在一种实现方式中，指示信息承载于触发帧的以下字段的至少一种字段中：第一字段、第二字段。第一字段为触发帧的上行带宽字段，或者上行带宽字段和上行带宽扩展字段。第二字段为触发帧的预留字段。其中，触发帧的预留字段为以下字段的任意一种：公共信息字段的上行高效预留字段、公共信息字段的预留字段、特殊用户信息字段的上行通用信令预留字段、特殊用户信息字段的预留字段。
在一种实现方式中，触发帧的上行带宽字段和上行带宽扩展字段至少一个字段中的部分或者全部比特用于指示上述实现方式中描述的三种带宽信息中的至少一种。
在一种实现方式中，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或全部比特用于指示上述实现方式中描述的三种带宽信息中的至少一种。
在一种实现方式中，一个触发帧包括多个特殊用户字段，每一个特殊用户字段用于指示一个TB PPDU的带宽。
在一种实现方式中，收发单元1302还用于接收来自站点的EHT-LTF序列。处理单元1301还用于根据EHT-LTF序列进行信道估计，EHT-LTF序列是由指示信息确定的。
在一种实现方式中，图13中的各个单元所实现的相关功能可以通过收发器和处理器来实现。图14为本申请实施例提供的一种接入点的示意图。该接入点可以为能够执行本申请实施例提供的带宽指示方法的设备(例如芯片)。其中，接入点可以包括收发器1401、至少一个处理器1402和存储器1403。其中，收发器1401、处理器1402和存储器1403可以通过一条或多条通信总线相互连接，也可以通过其它方式相连接。
其中，收发器1401可以用于发送数据，或者接收数据。可以理解的是，收发器1401是统称，可以包括接收器和发送器。例如，接收器用于接收来自站点的TB PPDU。又例如，发送器用于向站点发送指示信息。
其中，处理器1402可以用于对接入点的数据进行处理。处理器1402可以包括一个或多个处理器，例如该处理器1402可以是一个或多个中央处理器CPU，网络处理器NP，硬件芯片或者其任意组合。在处理器1402是一个CPU的情况下，该CPU可以是单核CPU，也可以是多核CPU。
其中，存储器1403用于存储程序代码等。存储器1403可以包括易失性存储器，例如随机存取存储器RAM；存储器1403也可以包括非易失性存储器，例如只读存储器ROM，快闪 存储器，硬盘HDD或固态硬盘SSD；存储器1403还可以包括上述种类的存储器的组合。
其中，上述处理器1402和存储器1403可以通过接口耦合，也可以集成在一起，本实施例不作限定。
上述收发器1401和处理器1402可以用于执行本申请实施例提供的带宽指示方法，具体实现方式如下：
处理器1402用于生成指示信息。指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息。三个及以上TB PPDU包括HE TB PPDU、EHT TB PPDU、演进的EHT TB PPDU中的一种或多种。收发器1401用于向站点发送指示信息。
在一种实现方式中，指示信息的数量为多个。指示信息承载于聚合触发帧中。聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。
在一种实现方式中，指示信息的数量为多个。指示信息承载于一个触发帧或者多个触发帧中。多个触发帧为同一触发帧在不同频域范围内复制得到的。
在一种实现方式中，指示信息用于指示TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种。
在一种实现方式中，指示信息承载于触发帧的以下字段的至少一种字段中：第一字段、第二字段。第一字段为触发帧的上行带宽字段，或者上行带宽字段和上行带宽扩展字段。第二字段为触发帧的预留字段。其中，触发帧的预留字段为以下字段的任意一种：公共信息字段的上行高效预留字段、公共信息字段的预留字段、特殊用户信息字段的上行通用信令预留字段、特殊用户信息字段的预留字段。
在一种实现方式中，触发帧的上行带宽字段和上行带宽扩展字段至少一个字段中的部分或者全部比特用于指示上述实现方式中描述的三种带宽信息中的至少一种。
在一种实现方式中，触发帧的公共信息字段和特殊用户信息字段至少一个字段中的预留比特的部分或全部比特用于指示上述实现方式中描述的三种带宽信息中的至少一种。
在一种实现方式中，一个触发帧包括多个特殊用户字段，每一个特殊用户字段用于指示一个TB PPDU的带宽。
在一种实现方式中，收发器1401还用于接收来自站点的EHT-LTF序列。处理器1402还用于根据EHT-LTF序列进行信道估计，EHT-LTF序列是由指示信息确定的。
可以理解的是，前述方法实施例都可以援引到如图13和图14的带宽指示装置和接入点中，所能实现的有益效果参考前述方法实施例中对应的描述，在此不再赘述。
本申请实施例提供一种通信系统，该通信系统包括前述实施例所述的站点和接入点。
本申请实施例提供一种计算机可读存储介质，该计算机可读存储介质存储有程序或指令，当所述程序或指令在计算机上运行时，使得计算机执行本申请实施例中的带宽指示方法。
本申请实施例提供一种芯片或者芯片系统，该芯片或者芯片系统包括至少一个处理器和接口，接口和至少一个处理器通过线路互联，至少一个处理器用于运行计算机程序或指令，以进行本申请实施例中的带宽指示方法。
其中，芯片中的接口可以为输入或输出接口、管脚或电路等。
上述方面中的芯片系统可以是片上系统(system on chip，SOC)，也可以是基带芯片等，其中基带芯片可以包括处理器、信道编码器、数字信号处理器、调制解调器和接口模块等。
在一种实现方式中，本申请中上述描述的芯片或者芯片系统还包括至少一个存储器，该至少一个存储器中存储有指令。该存储器可以为芯片内部的存储单元，例如，寄存器、缓存 等，也可以是该芯片的存储单元(例如，只读存储器、随机存取存储器等)。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、计算机软件或者二者的结合来实现，为了清楚地说明硬件和软件的可互换性，在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (23)

  1. 一种带宽指示方法，其特征在于，包括：
    站点接收来自接入点的指示信息，所述指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息；所述三个及以上TB PPDU包括高效基于触发的物理层协议数据单元、极高吞吐率基于触发的物理层协议数据单元、演进的极高吞吐率基于触发的物理层协议数据单元中的一种或多种；
    所述站点确定所述站点对应的TB PPDU的带宽信息，并在所述站点对应的TB PPDU的带宽上向所述接入点发送TB PPDU。
  2. 一种带宽指示方法，其特征在于，包括：
    接入点生成指示信息，所述指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息；所述三个及以上TB PPDU包括高效基于触发的物理层协议数据单元、极高吞吐率基于触发的物理层协议数据单元、演进的极高吞吐率基于触发的物理层协议数据单元中的一种或多种；
    所述接入点向站点发送所述指示信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述指示信息的数量为多个，所述指示信息承载于聚合触发帧中，所述聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。
  4. 根据权利要求1或2所述的方法，其特征在于，所述指示信息的数量为多个，所述指示信息承载于一个触发帧或者多个触发帧中，所述多个触发帧为同一触发帧在不同频域范围内复制得到的。
  5. 根据权利要求1至4任意一项所述的方法，其特征在于，所述指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息，包括：
    所述指示信息用于指示以下信息中的至少一种：TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息。
  6. 根据权利要求5所述的方法，其特征在于，所述指示信息承载于触发帧的以下字段的至少一种字段中：第一字段、第二字段，所述第一字段为触发帧的上行带宽字段和上行带宽扩展字段，所述第二字段为触发帧的预留字段。
  7. 根据权利要求4所述的方法，其特征在于，一个触发帧包括多个特殊用户字段，一个特殊用户字段用于指示一个TB PPDU的带宽。
  8. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述站点基于所述指示信息生成极高吞吐率长训练EHT-LTF序列，并向所述接入点发送所述EHT-LTF序列。
  9. 根据权利要求5或8所述的方法，其特征在于，所述站点基于所述指示信息生成EHT-LTF序列，包括：
    所述站点基于TB PPDU的带宽信息、TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种，生成EHT-LTF序列。
  10. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    所述接入点接收来自所述站点的EHT-LTF序列，并根据所述EHT-LTF序列进行信道估计，所述EHT-LTF序列是由所述指示信息确定的。
  11. 一种带宽指示装置，其特征在于，包括：
    收发单元，用于接收来自接入点的指示信息，所述指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息；所述三个及以上TB PPDU包括高效基于触发的物理层协议数据单元、极高吞吐率基于触发的物理层协议数据单元、演进的极高吞吐率基于触发的物理层协议数据单元中的一种或多种；
    处理单元，用于确定所述站点对应的TB PPDU的带宽信息；
    所述收发单元还用于在所述站点对应的TB PPDU的带宽上向所述接入点发送TB PPDU。
  12. 一种带宽指示装置，其特征在于，包括：
    处理单元，用于生成指示信息，所述指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息；所述三个及以上TB PPDU包括高效基于触发的物理层协议数据单元、极高吞吐率基于触发的物理层协议数据单元、演进的极高吞吐率基于触发的物理层协议数据单元中的一种或多种；
    收发单元，用于向站点发送所述指示信息。
  13. 根据权利要求11或12所述的装置，其特征在于，所述指示信息的数量为多个，所述指示信息承载于聚合触发帧中，所述聚合触发帧包括多个触发帧，一个触发帧承载一个指示信息。
  14. 根据权利要求11或12所述的装置，其特征在于，所述指示信息的数量为多个，所述指示信息承载于一个触发帧或者多个触发帧中，所述多个触发帧为同一触发帧在不同频域范围内复制得到的。
  15. 根据权利要求11至14任意一项所述的装置，其特征在于，所述指示信息用于指示三个及以上基于触发的物理层协议数据单元TB PPDU的带宽信息，包括：
    所述指示信息用于指示TB PPDU的带宽信息、基于触发的聚合物理层协议数据单元TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种。
  16. 根据权利要求15所述的装置，其特征在于，所述指示信息承载于触发帧的以下字段的至少一种字段中：第一字段、第二字段，所述第一字段为触发帧的上行带宽字段和上行带宽扩展字段，所述第二字段为触发帧的预留字段。
  17. 根据权利要求14所述的装置，其特征在于，一个触发帧包括多个特殊用户字段，每一个特殊用户字段用于指示一个TB PPDU的带宽。
  18. 根据权利要求11所述的装置，其特征在于，所述处理单元还用于基于所述指示信息生成极高吞吐率长训练EHT-LTF序列；所述收发单元还用于向所述接入点发送所述EHT-LTF序列。
  19. 根据权利要求15或18所述的装置，其特征在于，所述处理单元还用于基于所述指示信息生成EHT-LTF序列，包括：
    基于TB PPDU的带宽信息、TB A-PPDU的聚合带宽信息或TB A-PPDU中各个PPDU的带宽组合信息中的一种或多种，生成EHT-LTF序列。
  20. 根据权利要求12所述的装置，其特征在于，所述收发单元还用于接收来自所述站点的EHT-LTF序列，所述处理单元还用于根据所述EHT-LTF序列进行信道估计，所述EHT-LTF序列是由所述指示信息确定的。
  21. 一种站点，其特征在于，包括存储器和处理器；
    所述存储器，用于存储指令；
    所述处理器，用于执行所述指令，使得如权利要求1、3至9中任意一项所述的方法被执 行。
  22. 一种接入点，其特征在于，包括处理器和接口；
    所述存储器，用于存储指令；
    所述处理器，用于执行所述指令，使得如权利要求2、3至7、10中任意一项所述的方法被执行。
  23. 一种通信系统，其特征在于，包括如权利要求21所述的站点，以及如权利要求22所述的接入点。
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