CN109819519B

CN109819519B - Data transmission method and device

Info

Publication number: CN109819519B
Application number: CN201711153510.2A
Authority: CN
Inventors: 吴伟民; 邓莹莹; 于健; 韩霄
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-11-20
Filing date: 2017-11-20
Publication date: 2023-03-24
Anticipated expiration: 2037-11-20
Also published as: CN109819519A

Abstract

The embodiment of the application discloses a data transmission method and a device, wherein the method comprises the following steps: the access point sends a scheduling association-beamforming training A-BFT frame to the station at a low frequency, wherein the scheduling A-BFT frame is used for indicating a scheduling time slot corresponding to the station in an A-BFT interval; and the access point scans SSW frames at sectors sent by the high-frequency receiving station in scheduling time slots, wherein the scheduling time slots are determined by the station according to the scheduling A-BFT frames. The method and the device can avoid the conflict generated by the station due to the competition of the time slots, and the access point can allocate the scheduling time slots corresponding to the A-BFT intervals for the station through the scheduling A-BFT frames, so that the station can send the SSW frames in the scheduling time slots allocated by the access point, and the station can complete the uplink sector scanning more quickly. In addition, the access point of the embodiment of the application sends the scheduling A-BFT frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

Description

Data transmission method and device

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a data transmission method and device.

Background

A WLAN (Wireless Local Area Network) generally operates in an unlicensed frequency spectrum, and frequency bands are mainly divided into 1GHz or less, 2.4GHz, 5GHz, 60GHz, and the like. In general, a frequency band of 7GHz or less is referred to as a low frequency band, and a frequency band of 28GHz or more is referred to as a high frequency band.

In order to realize data transmission on the high-frequency channel, the access point and the station need to complete an access process of the high-frequency channel. Referring to fig. 1, fig. 1 shows an access procedure of a high frequency channel, where the access procedure of the high frequency channel is a beacon interval as a period. The Beacon Interval includes a Beacon Header Indication (BHI) and a Data Transmission Interval (DTI).

The Beacon header indication includes a Beacon Transmission Interval (BTI), association Beamforming Training (a-BFT), and Announcement Transmission Interval (ATI). The access point sends a plurality of beacon frames to the station in a beacon transmission interval according to the sector numbers for downlink sector scanning; association-beamforming training for association with a site and uplink sector scanning; the advertisement Transmission Interval is used for the access point to poll the station for the buffered Data information and to allocate resources in a Data Transmission Interval (DTI) to the station. The entire data transmission interval is divided into a plurality of sub-intervals, and each sub-interval is divided into a Contention Based Access Period (CBAP) and a Service interval (SP) according to an Access form.

In the above-mentioned access procedure of the high frequency channel, this transmission mechanism may cause excessive overhead of the high frequency channel.

Disclosure of Invention

The embodiment of the application provides a data transmission method and device, which are used for solving the problem that the high-frequency channel overhead is too large under the existing transmission mechanism.

In a first aspect, an embodiment of the present application provides a data transmission method, which enables a station that receives a scheduled a-BFT frame to send an SSW frame in a scheduling timeslot allocated by an access point, and ensures that the station can complete uplink sector scanning more quickly. The method comprises the following steps:

the access point sends a scheduling association-beamforming training A-BFT frame to the station at a low frequency, wherein the scheduling A-BFT frame is used for indicating a scheduling time slot corresponding to the station in an A-BFT interval;

and the access point scans SSW frames at sectors sent by the high-frequency receiving station in scheduling time slots, wherein the scheduling time slots are determined by the station according to the scheduling A-BFT frames.

In the first aspect, the embodiments of the present application may avoid a collision caused by contention of a station, and an access point may allocate a scheduling timeslot corresponding to an a-BFT interval to the station through a scheduling a-BFT frame, so that the station may send an SSW frame in the scheduling timeslot allocated by the access point, and the station may complete uplink sector scanning more quickly. In addition, the access point of the embodiment of the application sends the scheduling type A-BFT frame to the site at a low frequency, so that the overhead of a high-frequency channel can be reduced.

In a second aspect, an embodiment of the present application provides a data transmission method, which can enable a station to complete uplink sector scanning faster under the condition of reducing overhead of a high frequency channel. The method comprises the following steps:

the method comprises the steps that a station receives a scheduling type A-BFT frame sent by an access point at a low frequency, wherein the scheduling type A-BFT frame is used for indicating a scheduling time slot corresponding to the station in an A-BFT interval;

and the station sends a sector scanning SSW frame to the access point at high frequency and in a scheduling time slot, wherein the scheduling time slot is determined by the station according to the scheduling A-BFT frame.

In a second aspect, the embodiments of the present application may avoid a collision caused by a station competing for a timeslot, and an access point may allocate a scheduling timeslot corresponding to an a-BFT interval to the station through a scheduling a-BFT frame, so that the station may send an SSW frame in the scheduling timeslot allocated by the access point, and the station may complete uplink sector scanning more quickly. In addition, the access point of the embodiment of the application sends the scheduling A-BFT frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

In a third aspect, an embodiment of the present application provides a data transmission method, which enables an access point to know a low-frequency and/or high-frequency channel condition of a station under the condition of reducing high-frequency channel overhead. The method comprises the following steps:

the access point sends a low-frequency beacon frame to the station at low frequency, wherein the low-frequency beacon frame comprises the sending time of the high-frequency beacon frame;

the access point transmits a high-frequency beacon frame to the station at high frequency according to the transmission time;

the received signal strength of the low frequency beacon frame and/or the high frequency beacon frame sent by the access point at the low frequency receiving station indicates the feedback information of the RSSI, and the feedback information is used for indicating the channel condition of the low frequency and/or the high frequency of the station.

In the third aspect, the access point may learn about the low-frequency and/or high-frequency channel conditions of the station by using the feedback information of the RSSI of the low-frequency beacon frame and/or the high-frequency beacon frame sent by the low-frequency receiving station; furthermore, the access point receiving the feedback information of the RSSI at the low frequency can reduce the overhead of the high frequency channel.

In a fourth aspect, an embodiment of the present application provides a data transmission method, which enables a station to feed back a channel condition of the station to an access point, while reducing overhead of a high-frequency channel. The method comprises the following steps:

a station receives a low-frequency beacon frame sent by an access point at a low frequency, wherein the low-frequency beacon frame comprises the sending time of a high-frequency beacon frame;

the station receives a high-frequency beacon frame transmitted by the access point at high frequency and at the transmission time;

the station acquires the RSSI of the low-frequency beacon frame and/or the high-frequency beacon frame;

the station sends the feedback information of the RSSI of the low-frequency beacon frame and/or the high-frequency beacon frame to the access point at the low frequency, and the feedback information is used for indicating the channel condition of the low frequency and/or the high frequency of the station.

In the fourth aspect, the station may transmit feedback information of RSSI of the low frequency beacon frame and/or the high frequency beacon frame to the access point at a low frequency, thereby making the access point aware of the channel condition of the station; in addition, the station sends the feedback information of the RSSI to the access point at a low frequency, so that the embodiment of the application can reduce the overhead of a high-frequency channel.

In a fifth aspect, the present invention provides a data transmission method, which can improve efficiency of sending feedback information of sector scanning to multiple stations by an access point, and can ask for an SSW ACK frame from the multiple stations through an SSW trigger frame. The method comprises the following steps:

an access point sends an SSW trigger frame to a site at a low frequency, wherein the SSW trigger frame is used for indicating feedback information of sector scanning and resource indication information adopted by a feedback SSW ACK frame of the site;

and the access point receives an SSW ACK frame sent by the station at the low frequency, wherein the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame and the physical layer parameters corresponding to the station in the resource unit corresponding to the station.

In the fifth aspect, the access point sends the SSW trigger frame to the stations at a low frequency, and the access point can make the multiple stations know the feedback information of the sector scanning according to the SSW trigger frame, so that the efficiency of sending the feedback information of the sector scanning by the access point to the multiple stations is higher; moreover, the access point can also enable a plurality of stations to know the resource indication information adopted by the feedback frame of the station according to the SSW trigger frame, so that the access point asks for the SSW ACK frame from the plurality of stations through the SSW trigger frame; in addition, the access point of the embodiment of the application sends the SSW trigger frame at a low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the fifth aspect, in a possible implementation manner, the feedback information of sector scanning includes at least one of sector selection, antenna selection, snr report, or whether polling is required;

the resource indication information includes at least one of the adopted resource unit, the adopted coding or modulation mode.

In a sixth aspect, the present invention provides a data transmission method, which can improve efficiency of sending feedback information of sector scanning to multiple stations by an access point, and can ask for an SSW ACK frame from the multiple stations through an SSW trigger frame. The method comprises the following steps:

the method comprises the steps that a site receives an SSW trigger frame sent by an access point at a low frequency, wherein the SSW trigger frame is used for indicating feedback information of sector scanning and resource indication information adopted by a feedback SSW ACK frame of the site;

and the station sends an SSW ACK frame to the access point at a low frequency, wherein the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame and the physical layer parameters corresponding to the station in a resource unit corresponding to the station.

In the sixth aspect, the station receives the SSW trigger frame sent by the access point at a low frequency, so that the multiple stations can know the feedback information of the sector scanning according to the SSW trigger frame, and therefore the efficiency that the multiple stations can receive the feedback information of the sector scanning sent by the access point is higher; moreover, a plurality of stations can know the resource indication information adopted by the feedback frame of the station according to the SSW trigger frame, so that the plurality of stations can feed back an SSW ACK frame to the access point according to the SSW trigger frame; in addition, the station receives the SSW trigger frame at a low frequency, so that the channel is more stable, the robustness is good, and the overhead of a high-frequency channel can be reduced.

With reference to the sixth aspect, in a possible implementation manner, the feedback information of sector scanning includes at least one of sector selection, antenna selection, snr report, or whether polling is required;

In a seventh aspect, embodiments of the present application provide a data transmission method, where an access point may more efficiently communicate a data transmission requirement of a collection station to multiple stations, and the access point may also more quickly receive feedback of the multiple stations based on the data transmission requirement. The method comprises the following steps:

and the access point sends a null data packet feedback Report polling NDP feedback Poll trigger frame to the station at a low frequency, wherein the NDP feedback Report Poll trigger frame is used for collecting the data transmission requirement of the station.

In a seventh aspect, an access point sends an NDP feedback Report Poll trigger frame to a station at a low frequency, so that multiple stations can receive the NDP feedback Report Poll trigger frame at the same time, and the multiple stations can know the data transmission requirements of the station to be collected by the access point at the same time. In addition, the access point of the embodiment of the application sends the NDP feedback Report Poll trigger frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the seventh aspect, in a possible implementation manner, the NDP feedback Report Poll trigger frame includes a feedback type field;

the feedback type field is used for indicating whether the station needs to feed back the low-frequency uplink data transmission requirement; or,

the feedback type field is used for indicating whether the station needs to feed back the high-frequency uplink data transmission requirement; or,

the feedback type field is used for indicating whether the station needs to feed back whether to upload a service interval request SPR frame to indicate high-frequency uplink requirements; or,

the feedback type field is used to indicate whether the station needs feedback to update the uplink alignment.

In an eighth aspect, embodiments of the present application provide a data transmission method, so that multiple stations can know data transmission requirements of stations to be collected by an access point at the same time, and the multiple stations can also send feedback based on the data transmission requirements to the access point faster. The method comprises the following steps:

and the site receives an NDP feedback Report Poll trigger frame sent by the access point at a low frequency, wherein the NDP feedback Report Poll trigger frame is used for collecting the data transmission requirement of the site.

In the eighth aspect, multiple stations may receive the NDP feedback Report Poll trigger frame at the same time, so as to ensure that the multiple stations know the data transmission requirements of the stations to be collected by the access point at the same time; moreover, the NDP feedback Report Poll trigger frame in the embodiment of the present application may more efficiently communicate the data transmission requirement of the collection station to a plurality of stations, and the plurality of stations may also more quickly send feedback based on the data transmission requirement to the access point. In addition, the station receives the NDP feedback Report Poll trigger frame sent by the access point at a low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the eighth aspect, in a possible implementation manner, the NDP feedback Report Poll trigger frame includes a feedback type field;

the feedback type field is used to indicate whether the station needs to feed back whether it wants to update the uplink alignment.

In a ninth aspect, embodiments of the present application provide a data transmission method, which can more efficiently communicate a need for requesting a high-frequency cache to a plurality of stations, and an access point can also more quickly receive feedback of the plurality of stations based on the high-frequency cache. The method comprises the following steps:

the access point sends a high-frequency buffer report HF BSR trigger frame or a high-frequency service interval request HF SPR trigger frame to the site at a low frequency, and the HF BSR trigger frame or the HF SPR trigger frame is used for requesting a high-frequency buffer from the site in detail;

and the access point sends an HF BSR frame or an HF SPR frame at the low-frequency receiving station, wherein the HF BSR frame or the HF SPR frame is sent by the station according to the corresponding resource indication information of the station in the HF BSR triggering frame or the HF SPR triggering frame.

In the ninth aspect, the access point sends the HF BSR trigger frame or the HF SPR trigger frame to the station at a low frequency, so that the multiple stations can receive the HF BSR trigger frame or the HF SPR trigger frame at the same time, and ensure that the multiple stations know that the access point requests the high-frequency cache to the station in detail at the same time. In addition, the access point of the embodiment of the application sends the HF BSR trigger frame or the HF SPR trigger frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

In a tenth aspect, embodiments of the present application provide a data transmission method, where a station may receive, more efficiently, a request for requesting a high-frequency cache, which is transmitted by an access point, and the station may also send feedback based on the high-frequency cache to the access point faster. The method comprises the following steps:

a station receives an HF BSR triggering frame or an HF SPR triggering frame sent by an access point at a low frequency, wherein the HF BSR triggering frame or the HF SPR triggering frame is used for requesting a high-frequency buffer to the station in detail;

and the site sends an HF BSR frame or an HF SPR frame to the site at low frequency, wherein the HF BSR frame or the HF SPR frame is sent by the site according to the corresponding resource indication information of the site in the HF BSR triggering frame or the HF SPR triggering frame.

In the tenth aspect, a station receives an HF BSR trigger frame or an HF SPR trigger frame sent by an access point at a low frequency, so that multiple stations can receive the HF BSR trigger frame or the HF SPR trigger frame at the same time, and guarantee that the multiple stations know that the access point requests a detailed high-frequency buffer from the station at the same time. In addition, the station of the embodiment of the present application receives the HF BSR trigger frame or the HF SPR trigger frame sent by the access point at the low frequency, which can reduce the overhead of the high frequency channel.

In an eleventh aspect, an embodiment of the present application provides a data transmission method, where a trigger frame of high-low frequency hybrid scheduling sent by an access point to a station at a low frequency can schedule data transmission of the station at the low frequency and the high frequency simultaneously. The method comprises the following steps:

the access point sends a trigger frame of high-frequency and low-frequency hybrid scheduling to the station at low frequency, and when a target identifier exists in the trigger frame of the high-frequency and low-frequency hybrid scheduling, the target identifier is used for indicating that the trigger frame of the high-frequency and low-frequency hybrid scheduling comprises low-frequency user information and high-frequency user information;

the low-frequency user information is used for scheduling the station to perform data transmission at low frequency, and the high-frequency user information is used for scheduling the station to perform data transmission at high frequency.

In the eleventh aspect, if the target identifier exists in the trigger frame of the high-low frequency hybrid schedule, it is indicated that the trigger frame of the high-low frequency hybrid schedule includes the low-frequency user information and the high-frequency user information. Compared with the prior art that the trigger frame can only carry low-frequency user information or high-frequency user information, the trigger frame of the high-low frequency hybrid scheduling in the embodiment of the application can simultaneously carry the low-frequency user information and the high-frequency user information, so that the data transmission of the station at low frequency and high frequency can be simultaneously scheduled through the trigger frame of the high-low frequency hybrid scheduling, and the transmission efficiency is improved. In addition, the access point of the embodiment of the application sends the trigger frame of the high-frequency and low-frequency hybrid scheduling to the station at the low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the eleventh aspect, in a possible implementation manner, the trigger frame of the high-frequency and low-frequency hybrid scheduling includes a high-frequency and low-frequency distinguishing identifier, where the high-frequency and low-frequency distinguishing identifier is used to indicate that user information in the trigger frame of the high-frequency and low-frequency hybrid scheduling is low-frequency user information or high-frequency user information.

In order to enable the station to recognize that the user information in the trigger frame of the high-frequency and low-frequency hybrid scheduling is low-frequency user information or high-frequency user information, the access point needs to add a high-frequency and low-frequency distinguishing identifier into the trigger frame of the high-frequency and low-frequency hybrid scheduling, so that the station can recognize that the user information in the trigger frame of the high-frequency and low-frequency hybrid scheduling is low-frequency user information or high-frequency user information according to the high-frequency and low-frequency distinguishing identifier.

With reference to the eleventh aspect, in a possible implementation manner, a high-low frequency distinguishing identifier is set in each user information of the trigger frame of the high-low frequency hybrid scheduling, and the high-low frequency distinguishing identifier is an identifier of the low-frequency user information or an identifier of the high-frequency user information; or,

the high-low frequency distinguishing mark is arranged in a public area of a trigger frame of the high-low frequency hybrid scheduling, and the high-low frequency distinguishing mark is the number of low-frequency user information or high-frequency user information; or,

the high-low frequency distinguishing mark is arranged between the low-frequency user information and the high-frequency user information of the trigger frame of the high-low frequency hybrid scheduling, and the high-low frequency distinguishing mark is a separator for separating the low-frequency user information and the high-frequency user information.

In a twelfth aspect, an embodiment of the present application provides a data transmission method, where a trigger frame of high-frequency and low-frequency hybrid scheduling sent by a station at a low-frequency receiving access point may schedule data transmission of the station at low frequency and high frequency simultaneously. The method comprises the following steps:

the method comprises the steps that a station receives a high-frequency and low-frequency hybrid scheduling trigger frame sent by an access point at a low frequency, and when a target identifier exists in the high-frequency and low-frequency hybrid scheduling trigger frame, the target identifier is used for indicating that the high-frequency and low-frequency hybrid scheduling trigger frame comprises low-frequency user information and high-frequency user information;

In the twelfth aspect, if the target identifier exists in the trigger frame of the high-low frequency hybrid scheduling, it is stated that the trigger frame of the high-low frequency hybrid scheduling includes the low-frequency user information and the high-frequency user information. Compared with the prior art that the trigger frame can only carry low-frequency user information or high-frequency user information, the trigger frame of the high-low frequency hybrid scheduling in the embodiment of the application can simultaneously carry the low-frequency user information and the high-frequency user information, so that the data transmission of the station at low frequency and high frequency can be simultaneously scheduled through the trigger frame of the high-low frequency hybrid scheduling, and the transmission efficiency is improved. In addition, the station receives the trigger frame of the high-frequency and low-frequency hybrid scheduling sent by the access point at the low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the twelfth aspect, in a possible implementation manner, the trigger frame of the high-frequency and low-frequency hybrid scheduling includes a high-frequency and low-frequency distinguishing identifier, where the high-frequency and low-frequency distinguishing identifier is used to indicate that user information in the trigger frame of the high-frequency and low-frequency hybrid scheduling is low-frequency user information or high-frequency user information.

The trigger frame of the high-low frequency hybrid scheduling comprises low-frequency user information and high-frequency user information, and in order to enable the station to recognize that the user information in the trigger frame of the high-low frequency hybrid scheduling is the low-frequency user information or the high-frequency user information, a high-low frequency distinguishing identifier is added to the trigger frame of the high-low frequency hybrid scheduling, so that the station can recognize that the user information in the trigger frame of the high-low frequency hybrid scheduling is the low-frequency user information or the high-frequency user information according to the high-low frequency distinguishing identifier.

With reference to the twelfth aspect, in a possible implementation manner, the high-frequency and low-frequency distinguishing identifier is set in each user information of the trigger frame of the high-frequency and low-frequency hybrid scheduling, and the high-frequency and low-frequency distinguishing identifier is an identifier of the low-frequency user information or an identifier of the high-frequency user information; or,

In a thirteenth aspect, an embodiment of the present application provides a data transmission method, where an a-MPDU aggregate frame sent by an access point to a station at a low frequency may schedule data transmission of the station at the low frequency and the high frequency simultaneously. The method comprises the following steps:

the access point sends an aggregation media intervention control protocol data unit (A-MPDU) aggregation frame to the site at a low frequency, wherein the A-MPDU aggregation frame comprises a low frequency trigger frame and a first announcement frame, the low frequency trigger frame comprises low frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the first announcement frame comprises high frequency user information;

In the thirteenth aspect, the a-MPDU aggregation frame in the embodiment of the present application may simultaneously carry low frequency user information and high frequency user information, so that data transmission of a station at low frequency and high frequency may be simultaneously scheduled through the a-MPDU aggregation frame, thereby improving transmission efficiency. In addition, the access point of the embodiment of the application sends the A-MPDU aggregation frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

In a fourteenth aspect, an embodiment of the present application provides a data transmission method, where a station receives an a-MPDU aggregation frame sent by an access point at a low frequency, and can schedule data transmission of the station at the low frequency and the high frequency simultaneously. The method comprises the following steps:

the method comprises the steps that a station receives an A-MPDU aggregation frame sent by an access point at a low frequency, the A-MPDU aggregation frame comprises a low frequency trigger frame and a first announcement frame, the low frequency trigger frame comprises low frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the first announcement frame comprises high frequency user information;

In a fourteenth aspect, the a-MPDU aggregation frame in the embodiment of the present application may simultaneously carry low frequency user information and high frequency user information, so that data transmission of a station at low frequency and high frequency may be simultaneously scheduled through the a-MPDU aggregation frame, thereby improving transmission efficiency. In addition, the station receives the A-MPDU aggregation frame sent by the access point at the low frequency, so that the overhead of a high-frequency channel can be reduced.

In a fifteenth aspect, an embodiment of the present application provides a data transmission method, where a second advertisement frame sent by an access point to a station at a low frequency may schedule data transmission of the station at the low frequency and a high frequency simultaneously. The method comprises the following steps:

the access point sends a second announcement frame to the station at a low frequency, wherein a low-frequency trigger information element in an action frame of the second announcement frame comprises low-frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the action frame of the second announcement frame comprises high-frequency user information;

In the fifteenth aspect, the second advertisement frame in the embodiment of the present application may simultaneously carry low frequency user information and high frequency user information, so that data transmission of the station at low frequency and high frequency may be simultaneously scheduled through the second advertisement frame, thereby improving transmission efficiency. In addition, the access point of the embodiment of the application sends the second announcement frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

In a sixteenth aspect, an embodiment of the present application provides a data transmission method, where a station receives a second advertisement frame sent by an access point at a low frequency, and can schedule data transmission of the station at the low frequency and a high frequency simultaneously. The method comprises the following steps:

a station receives a second announcement frame sent by an access point at a low frequency, wherein a low-frequency trigger information element in an action frame of the second announcement frame comprises low-frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the action frame of the second announcement frame comprises high-frequency user information;

In a sixteenth aspect, the second advertisement frame in the embodiment of the present application may simultaneously carry the low frequency user information and the high frequency user information, so that the data transmission of the station at the low frequency and the high frequency may be simultaneously scheduled through the second advertisement frame, thereby improving the transmission efficiency. In addition, the station of the embodiment of the application receives the second announcement frame sent by the access point at a low frequency, so that the overhead of a high-frequency channel can be reduced.

In a seventeenth aspect, embodiments of the present application provide a data transmission method, which may start transmission opportunities of low frequency and high frequency of an access point at the same time, and ensure that the high frequency and the low frequency of a station receive contention-free-end simultaneously. The method comprises the following steps:

when the access point sends a request transmission or a multi-user request transmission to the station at a low frequency, the access point sends the request transmission or the multi-user request transmission to the station at a high frequency through a first target delay time;

when the access point finishes sending high-frequency and low-frequency transmission opportunities to the station, the access point sends contention-free-end to the station at low frequency;

the access point transmits contention-free-end to the station at high frequency through the second target delay time.

In the seventeenth aspect, the embodiments of the present application may not only enable the low frequency and high frequency transmission opportunities of the access point to start at the same time, but also ensure that the high frequency and low frequency of the station receive contention-free-end simultaneously.

In an eighteenth aspect, an embodiment of the present application provides a data transmission method, which can enable transmission between an access point and a station to perform acknowledgement and retransmission using a low frequency, and use a high frequency resource for data transmission. The method comprises the following steps:

the access point sends first data to the station at low frequency;

the access point sends second data to the station at high frequency;

the access point sends a block acknowledgement request or a multi-user-block acknowledgement request to the station at a low frequency;

the access point receives block acknowledgements for the first data and the second data sent by the station at the low frequency.

In an eighteenth aspect, in the embodiments of the present application, the transmission between the access point and the station may utilize a low frequency for acknowledgement and retransmission, and a high frequency resource is used for data transmission, so as to optimize system resource allocation, thereby maximizing system efficiency.

In a nineteenth aspect, embodiments of the present application provide a data transmission apparatus for performing the method of the first aspect or any one of the possible implementations of the first aspect, the method of the third aspect or any one of the possible implementations of the third aspect, the method of the fifth aspect or any one of the possible implementations of the fifth aspect, the method of the seventh aspect or any one of the possible implementations of the seventh aspect, the method of the ninth aspect or any one of the possible implementations of the ninth aspect, the method of the eleventh aspect or any one of the possible implementations of the eleventh aspect, the method of the thirteenth aspect or any one of the possible implementations of the thirteenth aspect, the method of the fifteenth aspect or any one of the possible implementations of the fifteenth aspect, the method of the seventeenth aspect or any one of the possible implementations of the seventeenth aspect, or the method of the eighteenth aspect or any one of the possible implementations of the eighteenth aspect.

In a nineteenth aspect, the data transmission apparatus comprises functional means for performing the method of the first aspect or any one of the possible implementations of the first aspect, the method of the third aspect or any one of the possible implementations of the third aspect, the method of the fifth aspect or any one of the possible implementations of the fifth aspect, the method of the seventh aspect or any one of the possible implementations of the seventh aspect, the method of the ninth aspect or any one of the possible implementations of the ninth aspect, the method of the eleventh aspect or any one of the possible implementations of the eleventh aspect, the method of the thirteenth aspect or any one of the possible implementations of the thirteenth aspect, the method of the fifteenth aspect or any one of the possible implementations of the fifteenth aspect, the method of the seventeenth aspect or any one of the possible implementations of the seventeenth aspect, or the method of the eighteenth aspect or any one of the possible implementations of the eighteenth aspect.

In a twentieth aspect, embodiments of the present application provide a data transmission apparatus for performing the method of the second aspect or any one of the possible implementations of the second aspect, the method of the fourth aspect or any one of the possible implementations of the fourth aspect, the method of the sixth aspect or any one of the possible implementations of the sixth aspect, the method of the eighth aspect or any one of the possible implementations of the eighth aspect, the method of the tenth aspect or any one of the possible implementations of the tenth aspect, the method of the twelfth aspect or any one of the possible implementations of the twelfth aspect, the method of the fourteenth aspect or any one of the possible implementations of the sixteenth aspect.

In a twentieth aspect, the data transmission device comprises functional modules for performing the method of any one of the possible implementations of the second aspect or the second aspect, the method of any one of the possible implementations of the fourth aspect or the fourth aspect, the method of any one of the possible implementations of the sixth aspect or the sixth aspect, the method of any one of the possible implementations of the eighth aspect or the eighth aspect, the method of any one of the possible implementations of the tenth aspect or the tenth aspect, the method of any one of the possible implementations of the twelfth aspect or the twelfth aspect, the method of any one of the possible implementations of the fourteenth aspect or the fourteenth aspect, or the method of any one of the possible implementations of the sixteenth aspect or the sixteenth aspect.

With reference to the first aspect, in a possible implementation manner, before the access point sends the scheduled association-beamforming training a-BFT frame to the station at a low frequency, the method further includes:

the access point sends a high-frequency beacon frame to the station at high frequency according to the sending time;

The access point can know the low-frequency and/or high-frequency channel condition of the station by the RSSI feedback information of the low-frequency beacon frame and/or the high-frequency beacon frame sent by the low-frequency receiving station; furthermore, the access point receiving the feedback information of the RSSI at the low frequency can reduce the overhead of the high frequency channel.

With reference to the first aspect, in a possible implementation manner, after the SSW frame sent by the high-frequency receiving station in the scheduling timeslot, the method further includes:

The access point sends the SSW trigger frame to the sites at low frequency, and the access point can enable a plurality of sites to know the feedback information of sector scanning according to the SSW trigger frame, so that the efficiency of sending the feedback information of sector scanning to the plurality of sites by the access point is higher; moreover, the access point can also enable a plurality of stations to know the resource indication information adopted by the feedback frame of the station according to the SSW trigger frame, so that the access point asks for the SSW ACK frame from the plurality of stations through the SSW trigger frame; in addition, the access point of the embodiment of the application sends the SSW trigger frame at a low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the first aspect, in a possible implementation manner, the feedback information of sector scanning includes at least one of sector selection, antenna selection, snr report, or whether polling is required;

With reference to the first aspect, in a possible implementation manner, the feedback information of the RSSI includes at least one of a low-frequency identifier, a high-frequency extension identifier, or a high-frequency RSSI;

the low-frequency identification is used for indicating whether the RSSI of the low-frequency beacon frame conforms to the range of low-frequency transmission;

the high-frequency identification is used for indicating whether the maximum RSSI value of the high-frequency beacon frame directionally transmitted by the station at the omnidirectional receiving access point accords with the high-frequency transmission range or not;

the high-frequency extension mark is used for indicating whether the sum of the maximum value of the RSSI of the high-frequency beacon frame directionally transmitted by the station at the omnidirectional receiving access point and the target value accords with the high-frequency transmission range.

With reference to the first aspect, in a possible implementation manner, after the feedback information of the RSSI of the low-frequency beacon frame and/or the high-frequency beacon frame sent by the low-frequency receiving station, the method further includes:

The access point sends the NDP feedback Report Poll trigger frame to the stations at a low frequency, so that the stations can receive the NDP feedback Report Poll trigger frame at the same time, and the stations can know the data transmission requirements of the stations to be collected by the access point at the same time. In addition, the access point of the embodiment of the application sends the NDP feedback Report Poll trigger frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the first aspect, in a possible implementation manner, the NDP feedback Report Poll trigger frame includes a feedback type field;

the access point sends a high-frequency buffer report HF BSR triggering frame or a high-frequency service interval request HF SPR triggering frame to the site at a low frequency, and the HF BSR triggering frame or the HF SPR triggering frame is used for requesting a high-frequency buffer from the site in detail;

The access point sends the HF BSR trigger frame or the HF SPR trigger frame to the station at a low frequency, so that the multiple stations can receive the HF BSR trigger frame or the HF SPR trigger frame at the same time, and the multiple stations can know that the access point requests the high-frequency cache to the station in detail at the same time. In addition, the access point of the embodiment of the application sends the HF BSR trigger frame or the HF SPR trigger frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the first aspect, in a possible implementation manner, after the access point receives the feedback information of the RSSI of the low frequency beacon frame and/or the high frequency beacon frame sent by the low frequency station, the method further includes:

the access point sends a trigger frame of high-low frequency hybrid scheduling to the station at low frequency, and when a target identifier exists in the trigger frame of the high-low frequency hybrid scheduling, the target identifier is used for indicating that the trigger frame of the high-low frequency hybrid scheduling comprises low-frequency user information and high-frequency user information;

In a trigger frame of high-low frequency hybrid scheduling sent by an access point to a station at a low frequency, if a target identifier exists in the trigger frame of the high-low frequency hybrid scheduling, it is indicated that the trigger frame of the high-low frequency hybrid scheduling includes low-frequency user information and high-frequency user information. Compared with the prior art that the trigger frame can only carry low-frequency user information or high-frequency user information, the trigger frame of the high-low frequency hybrid scheduling in the embodiment of the application can simultaneously carry the low-frequency user information and the high-frequency user information, so that the data transmission of the station at low frequency and high frequency can be simultaneously scheduled through the trigger frame of the high-low frequency hybrid scheduling, and the transmission efficiency is improved. In addition, the access point of the embodiment of the application sends the trigger frame of the high-frequency and low-frequency hybrid scheduling to the station at the low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the first aspect, in a possible implementation manner, the trigger frame of the high-frequency and low-frequency hybrid scheduling includes a high-frequency and low-frequency distinguishing identifier, where the high-frequency and low-frequency distinguishing identifier is used to indicate that user information in the trigger frame of the high-frequency and low-frequency hybrid scheduling is low-frequency user information or high-frequency user information.

With reference to the first aspect, in a possible implementation manner, the high-frequency and low-frequency distinguishing identifier is set in each user information of the trigger frame of the high-frequency and low-frequency hybrid scheduling, and the high-frequency and low-frequency distinguishing identifier is an identifier of the low-frequency user information or an identifier of the high-frequency user information; or,

The A-MPDU aggregation frame in the embodiment of the application can simultaneously carry low-frequency user information and high-frequency user information, so that the data transmission of the station at low frequency and high frequency can be simultaneously scheduled through the A-MPDU aggregation frame, and the transmission efficiency is improved. In addition, the access point of the embodiment of the application sends the A-MPDU aggregation frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

The second advertisement frame in the embodiment of the present application may simultaneously carry low frequency user information and high frequency user information, so that the second advertisement frame may simultaneously schedule data transmission of a station at low frequency and high frequency, thereby improving transmission efficiency. In addition, the access point of the embodiment of the application sends the second announcement frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the second aspect, in a possible implementation manner, before the station receives the scheduled a-BFT frame sent by the access point at the low frequency, the method further includes:

The station can send the low-frequency beacon frame and/or the RSSI feedback information of the high-frequency beacon frame to the access point at a low frequency, so that the access point can know the channel condition of the station; in addition, the station sends the feedback information of the RSSI to the access point at a low frequency, so that the embodiment of the application can reduce the overhead of a high-frequency channel.

With reference to the second aspect, in a possible implementation manner, after the station sends a sector scanning SSW frame to the access point at a high frequency and in a scheduled time slot, the method further includes:

The access point sends the SSW trigger frame to the sites at low frequency, and the access point can enable a plurality of sites to know the feedback information of sector scanning according to the SSW trigger frame, so that the efficiency of sending the feedback information of sector scanning to the plurality of sites by the access point is higher; moreover, the access point can also enable a plurality of stations to know the resource indication information adopted by the feedback frame of the station according to the SSW trigger frame, so that the access point asks for the SSW ACK frame from the plurality of stations through the SSW trigger frame; in addition, the access point of the embodiment of the application sends the SSW trigger frame at a low frequency, so that the channel is more stable, the robustness is good, and the overhead of a high-frequency channel can be reduced.

With reference to the second aspect, in a possible implementation manner, the feedback information of sector scanning includes at least one of sector selection, antenna selection, snr reporting, or whether polling is required;

With reference to the second aspect, in a possible implementation manner, the feedback information of the RSSI includes at least one of a low frequency identifier, a high frequency extension identifier, or a high frequency RSSI;

the high-frequency identification is used for indicating whether the maximum value of the RSSI of the high-frequency beacon frame directionally transmitted by the station at the omnidirectional receiving access point accords with a high-frequency transmission range or not;

With reference to the second aspect, in a possible implementation manner, the method further includes:

the station transmits a data frame to the access point at a low frequency, wherein the data frame comprises a transmission request field of uplink data and high-frequency data, and the transmission request field of the high-frequency data is used for indicating a request of the station for transmitting the data at the high frequency.

The station can carry the transmission request field of the high-frequency data in the data frame while sending the uplink data in the data frame to the access point at a low frequency, so that the station can actively carry the transmission request field of the high-frequency data through the data frame without waiting for the polling frame sent by the access point, and the access point can know the request of the station for transmitting the data at the high frequency through the data frame. Compared with the prior art that the access point sends polling frames to each station one by one at high frequency to obtain the request of the station for transmitting data at high frequency, the embodiment of the application saves high-frequency channel resources by carrying the transmission request field of high-frequency data in the data frame.

With reference to the second aspect, in a possible implementation manner, the data frame includes at least one of a control identifier, an access category bitmap, a service identifier difference value, or a high-frequency transmission duration request.

With reference to the second aspect, in a possible implementation manner, after the station sends the feedback information of the RSSI of the low frequency beacon frame and/or the high frequency beacon frame to the access point at the low frequency, the method further includes:

With reference to the second aspect, in a possible implementation manner, the NDP feedback Report Poll trigger frame includes a feedback type field;

With reference to the second aspect, in a possible implementation manner, after the station receives, at the low frequency, the NDP feedback Report Poll trigger frame sent by the access point, the method further includes:

the method comprises the steps that a site sends NDP feedback information based on an NDP feedback Report Poll trigger frame to an access point;

when a feedback type field of an NDP feedback Report Poll trigger frame is used for indicating whether a site needs to feed back a low-frequency uplink data transmission requirement, NDP feedback information includes a first identifier or a second identifier, the first identifier is used for indicating that the low-frequency uplink data transmission requirement exists, and the second identifier is used for indicating that the low-frequency uplink data transmission requirement does not exist; or,

when a feedback type field of an NDP feedback Report Poll trigger frame is used for indicating whether a site needs to feed back a high-frequency uplink data transmission requirement, NDP feedback information includes a third identifier or a fourth identifier, the third identifier is used for indicating that the high-frequency uplink data transmission requirement exists, and the fourth identifier is used for indicating that the high-frequency uplink data transmission requirement does not exist; or,

when a feedback type field of the NDP feedback Report Poll trigger frame is used for indicating that a station needs to feed back whether to upload a service interval request SPR frame to indicate a high-frequency uplink request, NDP feedback information includes a fifth identifier or a sixth identifier, the fifth identifier is used for indicating that the service interval request SPR frame is desired to be uploaded to indicate the high-frequency uplink request, and the sixth identifier is used for indicating that the service interval request SPR frame is not desired to be uploaded to indicate the high-frequency uplink request; or,

when the feedback type field of the NDP feedback Report Poll trigger frame is used to indicate whether the station needs to feed back whether it wants to update the uplink alignment, the NDP feedback information includes a seventh flag or an eighth flag, where the seventh flag is used to indicate that it is desired to update the uplink alignment, and the eighth flag is used to indicate that it is not desired to update the uplink alignment.

After the station receives the NDP feedback Report Poll trigger frame sent by the access point at the low frequency, the station sends NDP feedback information to the access point according to the specific type of the feedback type field of the NDP feedback Report Poll trigger frame, so that the station feeds back the access point based on the data transmission requirement.

a station receives a HF BSR trigger frame or a HF SPR trigger frame sent by an access point at a low frequency, wherein the HF BSR trigger frame or the HF SPR trigger frame is used for requesting a high-frequency buffer from the station in detail;

and the site sends a HF BSR frame or a HF SPR frame to the site at a low frequency, wherein the HF BSR frame or the HF SPR frame is sent by the site according to the corresponding resource indication information of the site in the HF BSR triggering frame or the HF SPR triggering frame.

In a twenty-first aspect, an embodiment of the present application provides a data transmission apparatus, which enables a station that receives a scheduled a-BFT frame to send an SSW frame in a scheduling timeslot allocated by an access point, and ensures that the station can complete uplink sector scanning more quickly. The device includes:

the system comprises a sending module, a scheduling association-beamforming training A-BFT module and a scheduling A-BFT module, wherein the sending module is used for sending a scheduling association-beamforming training A-BFT frame to a station at a low frequency, and the scheduling A-BFT frame is used for indicating a scheduling time slot corresponding to the station in an A-BFT interval;

and the receiving module is used for scanning the SSW frame at the sector sent by the high-frequency receiving station in the scheduling time slot, wherein the scheduling time slot is determined by the station according to the scheduling A-BFT frame.

In a twenty-first aspect, in the embodiments of the present application, a station may avoid a collision caused by contention for a time slot, and an access point may allocate a scheduling time slot corresponding to an a-BFT interval to the station through a scheduling a-BFT frame, so that the station may send an SSW frame in the scheduling time slot allocated by the access point, and the station may complete uplink sector scanning more quickly. In addition, the access point of the embodiment of the application sends the scheduling A-BFT frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the twenty-first aspect, in one possible implementation manner:

the transmitting module is also used for transmitting a low-frequency beacon frame to the station at a low frequency, wherein the low-frequency beacon frame comprises the transmitting time of the high-frequency beacon frame; the station is also used for sending a high-frequency beacon frame to the station at high frequency according to the sending time;

the receiving module is further configured to send, at the low frequency receiving station, feedback information indicating RSSI of the received signal strength of the low frequency beacon frame and/or the high frequency beacon frame, where the feedback information is used to indicate a low frequency and/or high frequency channel condition of the station.

the sending module is further configured to send an SSW trigger frame to the site at a low frequency, where the SSW trigger frame is used to indicate feedback information of sector scanning and resource indication information adopted by a feedback sector scanning acknowledgement SSW ACK frame of the site;

the receiving module is further configured to receive, at the low frequency, an SSW ACK frame sent by the station, where the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame, in the resource unit corresponding to the station according to the physical layer parameter corresponding to the station.

the feedback information of sector scanning comprises at least one of sector selection, antenna selection, signal-to-noise ratio report or whether polling is needed;

the feedback information of the RSSI comprises at least one of a low-frequency identifier, a high-frequency extension identifier or a high-frequency RSSI;

and the sending module is further used for sending a null data packet feedback Report polling NDP feedback Poll trigger frame to the site at a low frequency, wherein the NDP feedback Report Poll trigger frame is used for collecting the data transmission requirement of the site.

With reference to the twenty-first aspect, in a possible implementation manner, the NDP feedback Report Poll trigger frame includes a feedback type field;

With reference to the twenty-first aspect, in a possible implementation manner:

the sending module is further configured to send a high-frequency buffer report HF BSR trigger frame or a high-frequency service interval request HF SPR trigger frame to the site at a low frequency, where the HF BSR trigger frame or the HF SPR trigger frame is used to request a detailed high-frequency buffer from the site;

the receiving module is further configured to send, by the station, an HF BSR frame or an HF SPR frame at the low-frequency receiving station, where the HF BSR frame or the HF SPR frame is sent according to resource indication information corresponding to the station in the HF BSR trigger frame or the HF SPR trigger frame.

the sending module is further used for sending a trigger frame of high-low frequency hybrid scheduling to the station at a low frequency, and when a target identifier exists in the trigger frame of the high-low frequency hybrid scheduling, the target identifier is used for indicating that the trigger frame of the high-low frequency hybrid scheduling comprises low-frequency user information and high-frequency user information;

With reference to the twenty-first aspect, in a possible implementation manner, the trigger frame of the high-frequency and low-frequency hybrid scheduling includes a high-frequency and low-frequency distinguishing identifier, where the high-frequency and low-frequency distinguishing identifier is used to indicate that user information in the trigger frame of the high-frequency and low-frequency hybrid scheduling is low-frequency user information or high-frequency user information.

With reference to the twenty-first aspect, in a possible implementation manner, the high-frequency and low-frequency distinguishing identifier is set in each user information of the trigger frame of the high-frequency and low-frequency hybrid scheduling, and the high-frequency and low-frequency distinguishing identifier is an identifier of the low-frequency user information or an identifier of the high-frequency user information; or,

the transmitting module is further used for transmitting an aggregated media intervention control protocol data unit (A-MPDU) aggregated frame to the site at a low frequency, wherein the A-MPDU aggregated frame comprises a low-frequency trigger frame and a first announcement frame, the low-frequency trigger frame comprises low-frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the first announcement frame comprises high-frequency user information;

the sending module is further configured to send a second advertisement frame to the station at a low frequency, where a low-frequency trigger information element in an action frame of the second advertisement frame includes low-frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the action frame of the second advertisement frame includes high-frequency user information;

In a twenty-second aspect, an embodiment of the present application provides a data transmission apparatus, which can enable a station to complete uplink sector scanning faster under the condition of reducing overhead of a high-frequency channel. The device includes:

the receiving module is used for receiving a scheduling type A-BFT frame sent by the access point at a low frequency, and the scheduling type A-BFT frame is used for indicating a scheduling time slot corresponding to a station in an A-BFT interval;

and the sending module is used for sending the sector scanning SSW frame to the access point at high frequency and in a scheduling time slot, wherein the scheduling time slot is determined by the station according to the scheduling A-BFT frame.

In a twenty-second aspect, the embodiments of the present application may avoid a collision caused by contention for a station, and an access point may allocate a scheduling timeslot corresponding to an a-BFT interval to the station through a scheduling a-BFT frame, so that the station may send an SSW frame in the scheduling timeslot allocated by the access point, and the station may complete uplink sector scanning more quickly. In addition, the access point of the embodiment of the application sends the scheduling A-BFT frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

With reference to the twenty-second aspect, in a possible implementation manner, the apparatus further includes an obtaining module, where:

the receiving module is further used for receiving a low-frequency beacon frame sent by the access point at a low frequency, wherein the low-frequency beacon frame comprises the sending time of the high-frequency beacon frame; the access point is also used for receiving a high-frequency beacon frame transmitted by the access point at a high frequency and at a transmission time;

the acquisition module is used for acquiring the RSSI of the low-frequency beacon frame and/or the high-frequency beacon frame;

and the sending module is further used for sending the low-frequency beacon frame and/or the high-frequency beacon frame RSSI feedback information to the access point at a low frequency, wherein the feedback information is used for indicating the low-frequency and/or high-frequency channel condition of the station.

With reference to the twenty-second aspect, in one possible implementation manner:

the receiving module is further configured to receive, at a low frequency, an SSW trigger frame sent by the access point, where the SSW trigger frame is used to indicate feedback information of sector scanning and resource indication information adopted by a feedback SSW ACK frame of a station;

the sending module is further configured to send an SSW ACK frame to the access point at a low frequency, where the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame, in the resource unit corresponding to the station according to the physical layer parameter corresponding to the station.

With reference to the twenty-second aspect, in a possible implementation manner:

With reference to the twenty-second aspect, in a possible implementation manner, the feedback information of the RSSI includes at least one of a low-frequency identifier, a high-frequency extension identifier, or a high-frequency RSSI;

the sending module is further configured to send a data frame to the access point at a low frequency, where the data frame includes a transmission request field for uplink data and high-frequency data, and the transmission request field for the high-frequency data is used to indicate a request for a station to transmit data at a high frequency.

With reference to the twenty-second aspect, in a possible implementation manner, the data frame includes at least one of a control identifier, an access category bitmap, a service identifier difference, or a high-frequency transmission duration request.

the receiving module is further configured to receive, at the low frequency, an NDP feedback Report Poll trigger frame sent by the access point, where the NDP feedback Report Poll trigger frame is used to collect data transmission requirements of a station.

With reference to the twenty-second aspect, in a possible implementation manner, the NDP feedback Report Poll trigger frame includes a feedback type field;

the sending module is further used for sending NDP feedback information based on the NDP feedback Report Poll trigger frame to the access point;

when the feedback type field of the NDP feedback Report Poll trigger frame is used to indicate whether the station needs to feed back whether it wants to update the uplink alignment, the NDP feedback information includes a seventh identifier or an eighth identifier, where the seventh identifier is used to indicate that it is desired to update the uplink alignment, and the eighth identifier is used to indicate that it is not desired to update the uplink alignment.

the receiving module is further used for receiving an HF BSR triggering frame or an HF SPR triggering frame sent by the access point at a low frequency, and the HF BSR triggering frame or the HF SPR triggering frame is used for requesting a high-frequency cache to the site in detail;

and the sending module is further configured to send, to the station, an HF BSR frame or an HF SPR frame at a low frequency, where the HF BSR frame or the HF SPR frame is sent by the station according to resource indication information corresponding to the station in the HF BSR trigger frame or the HF SPR trigger frame.

In a twenty-third aspect, an embodiment of the present application provides a data transmission apparatus, including: a transceiver, a processor, and a memory, wherein the transceiver, the memory, and the processor are in communication with each other through an internal connection path, the memory is configured to store instructions, the processor is configured to execute the instructions stored by the memory to control the transceiver to receive signals and control the transceiver to transmit signals, and when the processor executes the instructions stored by the memory, the apparatus causes the processor to perform the method of the first aspect or any of the possible implementations of the first aspect, the method of the third aspect or any of the possible implementations of the third aspect, the method of the fifth aspect or any of the possible implementations of the fifth aspect, the method of the seventh aspect or any of the possible implementations of the seventh aspect, the method of the ninth aspect or any of the possible implementations of the ninth aspect, the method of the eleventh aspect or any of the possible implementations of the eleventh aspect, the method of the thirteenth aspect or any of the possible implementations of the thirteenth aspect, the method of the fifteenth aspect or any of the eighteenth possible implementations of the seventeenth aspect, or any of the eighteenth aspect.

In a twenty-fourth aspect, an embodiment of the present application provides a data transmission apparatus, including: a transceiver, a processor, and a memory, wherein the transceiver, the memory, and the processor are in communication with each other through an internal connection path, the memory is configured to store instructions, the processor is configured to execute the instructions stored by the memory to control the transceiver to receive signals and control the transceiver to transmit signals, and when the processor executes the instructions stored by the memory, the apparatus causes the processor to perform the method of any one of the above-described possible implementations of the second aspect or the second aspect, the method of any one of the possible implementations of the fourth aspect or the fourth aspect, the method of any one of the possible implementations of the sixth aspect or the sixth aspect, the method of any one of the possible implementations of the eighth aspect or the eighth aspect, the method of any one of the possible implementations of the tenth aspect or the tenth aspect, the method of any one of the possible implementations of the twelfth aspect or the sixteenth aspect, or the method of any one of the possible implementations of the sixteenth aspect.

In a twenty-fifth aspect, embodiments of the present application provide a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect, the method of the third aspect or any one of the possible implementations of the third aspect, the method of the fifth aspect or any one of the possible implementations of the fifth aspect, the method of the seventh aspect or any one of the possible implementations of the seventh aspect, the method of the ninth aspect or any one of the possible implementations of the ninth aspect, the method of the eleventh aspect or any one of the possible implementations of the eleventh aspect, the method of the thirteenth aspect or any one of the possible implementations of the thirteenth aspect, the method of the fifteenth aspect or any one of the possible implementations of the fifteenth aspect, the method of the seventeenth aspect or any one of the possible implementations of the seventeenth aspect, or the method of the eighteenth aspect or any one of the possible implementations of the eighteenth aspect.

In a twenty-sixth aspect, embodiments of the present application provide a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the computer to perform the method of the second aspect or any of the possible implementations of the second aspect, the method of the fourth aspect or any of the possible implementations of the fourth aspect, the method of the sixth aspect or any of the possible implementations of the sixth aspect, the method of the eighth aspect or any of the possible implementations of the eighth aspect, the method of the tenth aspect or any of the possible implementations of the tenth aspect, the method of the twelfth aspect or any of the possible implementations of the twelfth aspect, the method of the fourteenth aspect or any of the possible implementations of the fourteenth aspect, or the method of any of the possible implementations of the sixteenth aspect or the sixteenth aspect.

Twenty-seventh aspect, embodiments of the present application provide a computer program product comprising instructions that, when run on a computer, cause the computer to perform the method of the first aspect or any of the possible implementations of the first aspect, the method of the third aspect or any of the possible implementations of the third aspect, the method of the fifth aspect or any of the possible implementations of the fifth aspect, the method of the seventh aspect or any of the possible implementations of the seventh aspect, the method of the ninth aspect or any of the possible implementations of the ninth aspect, the method of the eleventh aspect or any of the possible implementations of the eleventh aspect, the method of the thirteenth aspect or any of the possible implementations of the thirteenth aspect, the method of the fifteenth aspect or any of the possible implementations of the seventeenth aspect, the method of the seventeenth aspect or any of the possible implementations of the seventeenth aspect, or the method of the eighteenth aspect.

In a twenty-eighth aspect, the present application provides a computer program product comprising instructions that, when run on a computer, cause the computer to perform the method of the second aspect or any one of the possible implementations of the second aspect, the method of the fourth aspect or any one of the possible implementations of the fourth aspect, the method of the sixth aspect or any one of the possible implementations of the sixth aspect, the method of the eighth aspect or any one of the possible implementations of the eighth aspect, the method of the tenth aspect or any one of the possible implementations of the tenth aspect, the method of the twelfth aspect or any one of the possible implementations of the twelfth aspect, the method of the fourteenth aspect or any one of the possible implementations of the fourteenth aspect, or the method of any one of the possible implementations of the sixteenth aspect or the sixteenth aspect.

In a twenty-ninth aspect, embodiments of the present application provide a chip, which includes a processor and/or program instructions, and when the chip runs, implements the method in the first aspect or any one of the possible implementations of the first aspect, the method in the third aspect or any one of the possible implementations of the third aspect, the method in the fifth aspect or any one of the possible implementations of the fifth aspect, the method in the seventh aspect or any one of the possible implementations of the seventh aspect, the method in the ninth aspect or any one of the possible implementations of the ninth aspect, the method in the eleventh aspect or any one of the possible implementations of the eleventh aspect, the method in the thirteenth aspect or any one of the possible implementations of the thirteenth aspect, the method in the fifteenth aspect or any one of the possible implementations of the fifteenth aspect, the method in the seventeenth aspect or any one of the possible implementations of the seventeenth aspect, or the method in any one of the eighteenth aspect or any one of the possible implementations of the eighteenth aspect.

Thirty-first, the present embodiments provide a chip, which includes a processor and/or program instructions, and when the chip runs, implements the method in the second aspect or any one of the possible implementations of the second aspect, the method in the fourth aspect or any one of the possible implementations of the fourth aspect, the method in the sixth aspect or any one of the possible implementations of the sixth aspect, the method in the eighth aspect or any one of the possible implementations of the eighth aspect, the method in the tenth aspect or any one of the possible implementations of the tenth aspect, the method in the twelfth aspect or any one of the possible implementations of the twelfth aspect, the method in any one of the possible implementations of the fourteenth aspect or any one of the possible implementations of the sixteenth aspect or the sixteenth aspect.

Drawings

Fig. 1 shows an access procedure of a high frequency channel;

fig. 2 is a schematic diagram illustrating data communication between two access points and two stations;

FIG. 3 is a schematic diagram of a data transmission device 301 that includes both low and high frequency RF links;

fig. 4 is a flowchart illustrating a data transmission method according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a scheduled A-BFT frame;

fig. 6 is a flowchart illustrating another data transmission method according to an embodiment of the present application;

FIG. 7 is a diagram illustrating the frame structure of three piggybacked feedback information;

fig. 8 is a flowchart illustrating another data transmission method according to an embodiment of the present application;

FIG. 9 is a schematic diagram of an SSW trigger frame;

fig. 10 is a flowchart illustrating a further data transmission method according to an embodiment of the present application;

FIG. 11 is a diagram illustrating an NDP feedback Report Poll trigger frame;

fig. 12 is a flowchart illustrating another data transmission method according to an embodiment of the present application;

FIG. 13 is a diagram of an HF BSR trigger frame or an HF SPR trigger frame;

FIG. 14 is a diagram of an HF BSR frame or an HF SPR frame;

fig. 15 is a flowchart illustrating another data transmission method according to an embodiment of the present application;

FIG. 16 is a diagram of a trigger frame of the high and low frequency hybrid scheduling;

fig. 17 is a flowchart illustrating a further data transmission method according to an embodiment of the present application;

fig. 18 is a schematic diagram of an a-MPDU aggregation frame;

fig. 19 is a flowchart illustrating another data transmission method according to an embodiment of the present application;

fig. 20 is a diagram illustrating a second advertisement frame;

fig. 21 is a schematic flow chart of channel protection performed simultaneously at high and low frequencies;

fig. 22 is a flowchart illustrating another data transmission method according to an embodiment of the present application;

fig. 23 is a schematic flowchart illustrating a further data transmission method according to an embodiment of the present application;

fig. 24 is a flowchart illustrating a further data transmission method according to an embodiment of the present application;

FIG. 25 is a general flow chart illustrating a high and low frequency collaboration provided by an embodiment of the present application;

FIG. 26 is a partial flow chart illustrating a high frequency and low frequency collaboration provided by an embodiment of the present application;

fig. 27 is a flowchart illustrating a further data transmission method according to an embodiment of the present application;

FIG. 28 is a schematic view of a data frame;

FIG. 29 is a schematic view of another data frame;

fig. 30 is a schematic diagram of a data transmission apparatus according to an embodiment of the present application;

fig. 31 is a schematic diagram of another data transmission apparatus according to an embodiment of the present application;

fig. 32 is a schematic diagram of another data transmission apparatus according to an embodiment of the present application;

fig. 33 is a schematic diagram of another data transmission apparatus according to an embodiment of the present application;

fig. 34 is a schematic diagram of another data transmission device according to an embodiment of the present application.

Detailed Description

As mentioned above, the frequency band below 7GHz is generally referred to as low frequency, and the frequency band above 28GHz is referred to as high frequency. Of course, the low frequency and the high frequency can be understood as a channel or a frequency band of a lower frequency and a channel or a frequency band of a higher frequency, and the embodiments of the present application can be extended to communication assistance between any two channels or frequency bands, and are not limited to cooperative transmission below 7G and above 28G.

Air interface transmission can present different characteristics according to different frequency bands, and for low frequency, wireless transmission is characterized by relatively slow signal attenuation and wide transmission range. For high frequency, the beam directivity is relatively good, directional transmission can be formed by utilizing the beam forming of the antenna, and the transmission range is increased.

The embodiment of the application is based on the characteristics of low frequency and high frequency, namely based on the characteristics of wide low frequency transmission range and strong robustness, based on the characteristic of high frequency throughput rate, the low frequency is utilized to transmit the control signaling, and the high frequency is utilized to transmit data, so that the embodiment of the application utilizes the low frequency to carry out auxiliary transmission on the high frequency, and efficient high-low frequency cooperative transmission can be realized, thereby optimizing the system throughput rate and reducing the system delay.

Embodiments of the present application relate to data communication between one or more nodes and one or more nodes. The main scenario relates to communication between access points and stations, but applies equally to communication between access points and access points, and stations. The node mentioned in the embodiments of the present application may be an access point or a station; the Access Point mentioned in the embodiment of the application can be an AP, and the English of the AP is called Access Point; the Station mentioned in the embodiment of the application can be an STA, and the English of the STA is called Station; the access Point mentioned in the embodiments of the present application may be replaced with a Personal Basic Service Set Control Point (PCP).

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a wlan according to an embodiment of the present disclosure. In the scenario illustrated in fig. 2, the wireless local area network includes access point 101, access point 102, station 201, and station 202, where access point 101 and access point 102 may communicate with station 201 and station 202 over a wireless link.

Alternatively, the access point shown in fig. 2 may be a device supporting the 802.11ax standard. Further alternatively, the access point may be a device supporting multiple WLAN systems, such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11 a. The station shown in fig. 2 may be a wireless communication chip, a wireless sensor, or a wireless communication terminal. For example: the mobile phone supporting the WiFi communication function, the tablet computer supporting the WiFi communication function, the set top box supporting the WiFi communication function, the smart television supporting the WiFi communication function, the smart wearable device supporting the WiFi communication function, the vehicle-mounted communication device supporting the WiFi communication function and the computer supporting the WiFi communication function. Optionally, the station may support an 802.11ax system, and further optionally, the station supports multiple WLAN systems such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11 a.

In the scenario shown in fig. 2, the technical solution provided by the embodiment of the present application may be applied to data communication between an access point and a station. E.g., data communication between access point 101 and station 201.

In the scenario shown in fig. 2, the technical solution provided by the embodiment of the present application may be applied to data communication between an access point and at least two stations. For example, access point 101 communicates data with

stations

201 and 202, respectively.

In the scenario shown in fig. 2, the technical solution provided by the embodiment of the present application may be applied to data communication between at least two access points and one station. For example, station 201 communicates data with access point 101 and access point 102, respectively.

In the scenario shown in fig. 2, the technical solution provided by the embodiment of the present application may be applied to data communication between at least two access points and at least two stations. For example, access point 101 and access point 102 communicate data with station 201 and station 202, respectively.

802.11ad defines an interface above the 802.11 low frequency MAC (media Access Control) layer and the high frequency MAC layer for the Transfer of the content of the MAC frames of different layers inside the node, which is called Fast Session Transfer (FST). Through their respective MAC interfaces, the two nodes can use low frequency to send high frequency MAC frames, which is also called an On-Channel tunneling (OCT) mechanism.

The access point or the station in the embodiment of the present application may be a communication server, a router, a switch, a bridge, a computer, a mobile phone, and other devices. An access point or a station related to the embodiment of the present application needs to include two radio frequency links of a low frequency and a high frequency at the same time.

Referring to fig. 3, fig. 3 is a schematic diagram of a data transmission apparatus 301 including two rf links of low frequency and high frequency. In the schematic diagram shown in fig. 3, the data transmission apparatus 301 includes a first rf link 3011 and a second rf link 3012, wherein the data transmission apparatus 301 may convert high frequency data into low frequency data by using the first rf link 3011, and the data transmission apparatus 301 may convert low frequency data into high frequency data by using the second rf link 3012. For example, the data transmission device 301 may convert high frequency data into low frequency data using the first rf link 3011 and transmit the low frequency data to other data transmission devices; for another example, the data transmission device 301 may receive low frequency data transmitted by another data transmission device, and convert the low frequency data into high frequency data by using the second rf link 3012.

In the embodiment shown in FIG. 3, the English of MAC is called Medium Access Control, and Chinese is explained as media Access Control; the English of PHY is Physical, and the Chinese is explained as Physical.

The following describes a data transmission method provided in an embodiment of the present application.

Fig. 4 is a flowchart illustrating a data transmission method according to an embodiment of the present application. The method shown in fig. 4 can enable the station receiving the scheduled a-BFT frame to send the SSW frame in the scheduling timeslot allocated by the access point, thereby ensuring that the station can complete the uplink sector scanning more quickly. The method comprises the following steps.

And S11, the access point sends a scheduling type A-BFT frame to the station at a low frequency, wherein the scheduling type A-BFT frame is used for indicating a scheduling time slot corresponding to the station in an A-BFT interval.

And S12, the station receives the scheduling A-BFT frame sent by the access point at the low frequency.

And step S13, the station sends a sector scanning SSW frame to the access point at high frequency and in a scheduling time slot.

And S14, the access point receives the SSW frame sent by the station in the scheduling time slot at the high-frequency receiving station, wherein the scheduling time slot is determined by the station according to the scheduling A-BFT frame.

Wherein, the English of A-BFT is called Association Beamforming Training, and the Chinese definition is Association Beamforming Training. The English language of SSW is called whole Sector Sweep, and the Chinese definition is Sector Sweep.

In the embodiment shown in fig. 4, the station may avoid collision caused by contention for the timeslot, and the access point may allocate a scheduling timeslot corresponding to an a-BFT interval to the station through a scheduling a-BFT frame, so that the station may send an SSW frame in the scheduling timeslot allocated by the access point, and the station may complete uplink sector scanning more quickly. In addition, the access point of the embodiment of the application sends the scheduling type A-BFT frame to the site at a low frequency, so that the overhead of a high-frequency channel can be reduced.

For example, referring to fig. 5, fig. 5 is a diagram illustrating a scheduled a-BFT frame. In fig. 5, the scheduled a-BFT frame is used to indicate the scheduled timeslot corresponding to the station in the a-BFT interval. The access point may multiplex a DMG (Directional Multi-Gigabit ) Extended Schedule Element (Extended Schedule Element) in the 802.11ad to perform scheduling of a-BFT, that is, an Action frame is used to carry corresponding scheduling information, so as to form a scheduling a-BFT frame shown in fig. 5.

In fig. 5, the scheduled a-BFT frame includes 1 or more Allocation fields, 1 or more Allocation fields are used to indicate 1 or more different scheduled timeslots, respectively, and 1 or more different scheduled timeslots are allocated to 1 or more different stations, respectively. For example, the third field Allocation 1 in the first row of fig. 5 is used to indicate the Allocation of the first station with respect to the scheduled time slot, and the last field Allocation N in the first row of fig. 5 is used to indicate the Allocation of the last station with respect to the scheduled time slot.

In fig. 5, the scheduled a-BFT frame further includes a Source AID (Source association identification) field, which is used to indicate association identification information of the scheduled station. After receiving the scheduled a-BFT frame, the station may identify its scheduled timeslot through the Source AID field. For example, the third field in the second row in fig. 5 is the Source AID field.

In fig. 5, the scheduled a-BFT frame further includes an Allocation Start field, where the Allocation Start field is used to indicate the Start time of the allocated scheduling timeslot, and an Allocation Type field is used to indicate that the Allocation is used for performing uplink sector scanning training of a-BFT. For example, the fifth field in the second line in FIG. 5 is the Allocation Start field.

It should be noted that the DMG Extended Schedule Element in the multiplexing 802.11ad is only one implementation manner, and other indication manners may also be adopted, for example, the access point may send a MAC frame, where the MAC frame includes 1 or more Allocation fields, source AID fields, allocation Start fields, and the like, and the station may still be allocated with the scheduling timeslot corresponding to the a-BFT interval.

Fig. 6 is a flowchart illustrating another data transmission method according to an embodiment of the present application. The method shown in fig. 6 may allow the access point to know the channel condition of the station at low and/or high frequencies while reducing the channel overhead at high frequencies. The method comprises the following steps.

And step S21, the access point transmits a low-frequency beacon frame to the station at a low frequency, wherein the low-frequency beacon frame comprises the transmission time of the high-frequency beacon frame.

After the access point sends the low-frequency beacon frame to the station at the low frequency, the station receives the low-frequency beacon frame sent by the access point at the low frequency.

And step S22, the station receives the low-frequency beacon frame sent by the access point at the low frequency.

Step S23, the access point transmits a high frequency beacon frame to the station at high frequency according to the transmission time.

After the access point transmits the high-frequency beacon frame to the station at high frequency according to the transmission time, the station receives the high-frequency beacon frame transmitted by the access point at high frequency and the transmission time.

Step S24, the station receives the high frequency beacon frame transmitted by the access point at high frequency and at the transmission time.

And step S25, the station acquires the RSSI of the low-frequency beacon frame and/or the high-frequency beacon frame.

In step S25, three cases are included, the first case is that the station acquires the RSSI of the low frequency beacon frame, the second case is that the station acquires the RSSI of the high frequency beacon frame, and the third case is that the station acquires the RSSI of the low frequency beacon frame and the RSSI of the high frequency beacon frame.

Step S26, the station sends the feedback information of the RSSI of the low frequency beacon frame and/or the high frequency beacon frame to the access point at the low frequency.

Of course, the following two steps may be adopted instead of step S21 and step S23: step 1, an access point sends a low-frequency beacon frame to a station at a low frequency, wherein the low-frequency beacon frame comprises information of the high-frequency beacon frame and sending time of Null Data Packets (NDP); and 2, the access point sends a null data packet to the station at high frequency according to the sending time.

The null data packet is a data packet without a data field and only containing a preamble, and is also transmitted directionally in each sector to assist the station in sector scanning training.

In the above step 1 and step 2, the access point transmits the information of the high frequency beacon frame to the station omni-directionally at low frequency through the low frequency beacon frame at one time, and only needs to transmit the null data packet with the preamble in each sector of high frequency, thereby reducing the overhead.

Step S27, the access point sends feedback information of the RSSI in the low frequency beacon frame and/or the high frequency beacon frame sent by the low frequency receiving station, and the feedback information is used for indicating the low frequency and/or high frequency channel condition of the station.

Wherein, the English full spelling of RSSI is a received Signal Strength Indicator, and the Chinese definition is a received Signal Strength Indicator.

Step S27 includes three cases, the first case is feedback information of the received signal strength indication RSSI of the low frequency beacon frame sent by the access point at the low frequency receiving station, and the feedback information is used for indicating the low frequency channel condition of the station; the second situation is feedback information of a received signal strength indicator RSSI of a high-frequency beacon frame sent by the access point at a low-frequency receiving station, wherein the feedback information is used for indicating the high-frequency channel condition of the station; in the third case, the access point sends feedback information of the RSSI of the low frequency beacon frame and the high frequency beacon frame to the low frequency receiving station, and the feedback information is used to indicate the channel conditions of the low frequency and the high frequency of the station.

In the first case, the feedback information of RSSI may include a low frequency identification. The low frequency identifier is used to indicate whether the RSSI of the low frequency beacon frame conforms to the range of the low frequency transmission, so the low frequency identifier may indicate the channel condition of the low frequency of the station.

In the second case, the feedback information of the RSSI may include at least one of a high frequency flag, a high frequency extension flag, or a high frequency RSSI. The high-frequency RSSI is used for indicating whether the maximum value of the RSSI of the high-frequency beacon frame directionally transmitted by the station at the omnidirectional receiving access point is in a high-frequency transmission range or not, the high-frequency extension mark is used for indicating whether the sum of the maximum value of the RSSI of the high-frequency beacon frame directionally transmitted by the station at the omnidirectional receiving access point and a target value is in the high-frequency transmission range or not, and the high-frequency RSSI is used for indicating the received signal strength indication of high frequency, so at least one of the high-frequency mark, the high-frequency extension mark or the high-frequency RSSI can indicate the channel condition of the high frequency of the station.

The target values mentioned in the previous paragraph are used to help the access point predict whether the high frequency transmission range will be met if two-way directional transmission is used. Wherein, the target value refers to a fixed value, such as 10 or 20.

In a third case, the feedback information of the RSSI includes a low frequency flag, and the feedback information further includes at least one of a high frequency flag, a high frequency extension flag, or a high frequency RSSI, and the channel condition of the station at the low frequency can be indicated by the low frequency flag, and the channel condition of the station at the high frequency can be indicated by the at least one of the high frequency flag, the high frequency extension flag, or the high frequency RSSI.

For example, please refer to fig. 7, where fig. 7 is a schematic diagram of three frame structures of piggybacked feedback information.

In fig. 7, there are three frame structures, a first frame structure may piggyback the feedback information by using an HTC (High Throughput Control) field in a header of the MAC frame, where a Control ID in the first frame structure is used to indicate that the type of the piggyback Control information is a type of uplink sector scanning performed by low frequency feedback assisted High frequency. The low-frequency Flag is a low-frequency identifier, the high-frequency Flag is a high-frequency identifier, the high-frequency + XdB Flag is a high-frequency extension identifier, and the high-frequency RSSI is a high-frequency received signal strength indicator.

The second frame structure may utilize an Action frame to carry feedback information, where a Category and a VHE Action are used to define that the type of the Action frame is a type for indicating that the type of the piggyback control information is a type for performing uplink sector scanning with low-frequency feedback assistance and high-frequency. In addition, VHE Action refers to Action indication of Next Generation standard, and other names such as NG (Next Generation ) or Video-Fi (Video Wi-Fi) may be used instead. The low-frequency Flag is a low-frequency identifier, the high-frequency Flag is a high-frequency identifier, the high-frequency + XdB Flag is a high-frequency extension identifier, and the high-frequency RSSI is a high-frequency received signal strength indicator.

The third frame structure may utilize an information Element to carry feedback information, where an Element ID is used to indicate that the type of piggyback control information is a type that performs uplink sector scanning with low frequency feedback assistance and high frequency. The low-frequency Flag is a low-frequency identifier, the high-frequency Flag is a high-frequency identifier, the high-frequency + XdB Flag is a high-frequency extension identifier, and the high-frequency RSSI is a high-frequency received signal strength indicator.

In the embodiment shown in fig. 6, the access point may learn about the low-frequency and/or high-frequency channel conditions of the stations by using the feedback information of the RSSI of the low-frequency beacon frame and/or the high-frequency beacon frame sent by the low-frequency receiving station; furthermore, the access point receiving the feedback information of the RSSI at the low frequency can reduce the overhead of the high frequency channel.

Fig. 8 is a flowchart illustrating another data transmission method according to an embodiment of the present application. The method shown in fig. 8 can make it more efficient for the access point to send the feedback information of sector scanning to multiple stations, and can ask for SSW ACK frames from multiple stations through SSW trigger frames. The method comprises the following steps.

Step S31, the access point sends an SSW trigger frame to the site at a low frequency, wherein the SSW trigger frame is used for indicating the feedback information of sector scanning and the resource indication information adopted by the feedback SSW ACK frame of the site.

Step S32, the station receives, at low frequency, an SSW trigger frame sent by the access point, where the SSW trigger frame is used to indicate feedback information of sector scanning and resource indication information adopted by a feedback SSW ACK frame of the station.

Step S33, the station sends an SSW ACK frame to the access point at a low frequency, wherein the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame and the physical layer parameters corresponding to the station in the resource unit corresponding to the station.

Step S34, the access point receives an SSW ACK frame sent by the station at the low frequency, wherein the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame and the physical layer parameters corresponding to the station in the resource unit corresponding to the station.

The feedback information of sector scanning includes at least one of sector selection, antenna selection, snr report or whether polling is required, and the resource indication information includes at least one of adopted resource unit, adopted coding or modulation mode.

In the embodiment shown in fig. 8, the access point in the embodiment of the present application can enable multiple stations to know the feedback information of sector scanning according to the SSW trigger frame, so that the efficiency of sending the feedback information of sector scanning by the access point to the multiple stations is higher; moreover, the access point can also enable a plurality of stations to know the resource indication information adopted by the feedback frame of the station according to the SSW trigger frame, so that the access point asks for the SSW ACK frame from the plurality of stations through the SSW trigger frame; in addition, the access point of the embodiment of the application sends the SSW trigger frame at a low frequency, so that the overhead of a high-frequency channel can be reduced.

For example, please refer to fig. 9, fig. 9 is a schematic diagram of an SSW trigger frame. In fig. 9, the SSW trigger frame includes a common domain and a site-by-site domain, wherein the trigger frame type in the common domain has 4 bits, and these 4 bits can indicate the trigger frame of type 16 by 0000 to 1111, 8 types (0000 to 0111) have been defined so far, and the rest of values (1000 to 1111) can be used to define the trigger frame as the SSW trigger frame; then, each user information of the station-by-station domain is utilized to carry corresponding information in the SSW Feedback field, as shown in fig. 9, the corresponding information in the SSW Feedback field may include sector selection, antenna selection, snr report, whether polling is needed, a reserved field, and the like.

Fig. 10 is a flowchart illustrating another data transmission method according to an embodiment of the present application. The method shown in fig. 10 may enable the access point to more efficiently communicate the data transmission needs of the collecting station to the plurality of stations, and the access point may also receive feedback from the plurality of stations based on the data transmission needs more quickly. The method comprises the following steps.

Step S41, the access point sends a null data packet feedback Report polling NDP feedback Poll trigger frame to the station at a low frequency, and the NDP feedback Report Poll trigger frame is used for collecting the data transmission requirement of the station.

Step S42, the site receives an NDP feedback Report Poll trigger frame sent by the access point at the low frequency, and the NDP feedback Report Poll trigger frame is used for collecting the data transmission requirement of the site.

The NDP feedback Report Poll trigger frame comprises a feedback type field; the feedback type field is used for indicating whether the station needs to feed back the low-frequency uplink data transmission requirement; or, the feedback type field is used for indicating whether the station needs to feed back the high-frequency uplink data transmission requirement; or, the feedback type field is used to indicate whether the station needs to feed back whether it wants to upload a service interval request SPR frame to indicate a high frequency uplink requirement; alternatively, the feedback type field is used to indicate whether the station needs to feed back whether it wants to update the uplink alignment.

Wherein the Chinese definition of the NDP feedback Report Poll is an empty data packet feedback Report Poll. The English language of SPR is called Service Period Request, and the Chinese definition is the Service interval Request.

In the embodiment shown in fig. 10, in the embodiment of the present application, multiple stations may simultaneously receive an NDP feedback Report Poll trigger frame sent by an access point, and it is ensured that the multiple stations simultaneously know about data transmission requirements of stations to be collected by the access point, and compared with the prior art in which the access point sends a Poll frame to each station one by one at a high frequency, the NDP feedback Report Poll trigger frame in the embodiment of the present application may more efficiently convey data transmission requirements of collecting stations to the multiple stations, and the access point may also more quickly receive feedback of the multiple stations based on the data transmission requirements. In addition, the access point of the embodiment of the application sends the NDP feedback Report Poll trigger frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

In the embodiment shown in fig. 10, optionally, after step S42, that is, after the station receives the NDP feedback Report Poll trigger frame sent by the access point at the low frequency, the method shown in fig. 10 may further include the following steps: and the station sends the NDP feedback information based on the NDP feedback Report Poll trigger frame to the access point.

After receiving the NDP feedback Report Poll trigger frame sent by the access point at the low frequency, the station may identify a specific type of the feedback type field of the NDP feedback Report Poll trigger frame. Since the feedback type field of the NDP feedback Report Poll trigger frame has four types, it is described below what the NDP feedback information based on the NDP feedback Report Poll trigger frame is sent by the station to the access point is different when the feedback type field of the NDP feedback Report Poll trigger frame is the four types, respectively.

In the first case, when the feedback type field of the NDP feedback Report Poll trigger frame is used to indicate whether the station needs to feed back the low-frequency uplink data transmission requirement, the NDP feedback information includes a first identifier or a second identifier, where the first identifier is used to indicate that the low-frequency uplink data transmission requirement exists, and the second identifier is used to indicate that the low-frequency uplink data transmission requirement does not exist.

In the first case, the presence of the low frequency uplink data transmission requirement indicates that the buffer information is greater than or equal to a predetermined or pre-negotiated threshold, and the absence of the low frequency uplink data transmission requirement indicates that the buffer information is less than the predetermined or pre-negotiated threshold.

In the second case, when the feedback type field of the NDP feedback Report Poll trigger frame is used to indicate whether the station needs to feed back the high-frequency uplink data transmission requirement, the NDP feedback information includes a third identifier or a fourth identifier, where the third identifier is used to indicate that the high-frequency uplink data transmission requirement exists, and the fourth identifier is used to indicate that the high-frequency uplink data transmission requirement does not exist.

In the second case, the high frequency uplink data transmission requirement indicates that the buffer information is greater than or equal to a predetermined or pre-negotiated threshold value, and the no high frequency uplink data transmission requirement indicates that the buffer information is less than the predetermined or pre-negotiated threshold value.

In a third case, when the feedback type field of the NDP feedback Report Poll trigger frame is used to indicate that the station needs to feed back whether it wants to upload the service interval request SPR frame to indicate the high-frequency uplink demand, the NDP feedback information includes a fifth identifier or a sixth identifier, where the fifth identifier is used to indicate that it wants to upload the service interval request SPR frame to indicate the high-frequency uplink demand, and the sixth identifier is used to indicate that it does not want to upload the service interval request SPR frame to indicate the high-frequency uplink demand.

In a fourth case, when the feedback type field of the NDP feedback Report Poll trigger frame is used to indicate whether the station needs to feed back whether it wants to update the uplink alignment, the NDP feedback information includes a seventh identifier or an eighth identifier, where the seventh identifier is used to indicate that it is desired to update the uplink alignment, and the eighth identifier is used to indicate that it is not desired to update the uplink alignment.

In this embodiment of the present application, after a station receives an NDP feedback Report Poll trigger frame sent by an access point at a low frequency, the station sends NDP feedback information to the access point according to a specific type of a feedback type field of the NDP feedback Report Poll trigger frame, thereby implementing feedback of the access point by the station based on a data transmission requirement.

For example, please refer to fig. 11, where fig. 11 is a schematic diagram of an NDP feedback Report Poll trigger frame. In fig. 11, the NDP Feedback Report trigger frame includes a public domain and a station-by-station domain, wherein the station-by-station domain includes a Feedback Type field for specifically indicating a meaning of Feedback expressed by NDP Feedback (null data packet Feedback), the Feedback Type field has 4 bits, the Feedback Type field is redefined in the embodiment of the present application so that the Feedback Type field has a plurality of meanings, and the meanings respectively represented by the 4 bits of the Feedback Type field redefined in the embodiment of the present application are respectively listed in table 1 below.

TABLE 1

In table 1, 0000 means a low-frequency resource requirement for indicating whether a station needs to feed back a low-frequency uplink data transmission requirement; 0001 means high-frequency resource requirement for indicating whether a station needs to feed back a high-frequency uplink data transmission requirement; 0010 means a requirement of a service interval request, and is used to indicate that a station needs to feed back whether it wants to upload a service interval request SPR frame to indicate a high-frequency uplink requirement; 0011 means the requirement of beam forming to indicate the station needs feedback whether it wants to update the uplink alignment.

In the embodiment shown in fig. 11, after receiving the NDP feedback Report Poll trigger frame sent by the access point, the station sends an NDP feedback with feedback status to the access point, and feeds back the information required by the access point to the access point through the feedback status in the NDP feedback. Optionally, after the access point receives the NDP feedback with feedback status sent by the station, the access point may send a multi-user acknowledgement frame to the station, so that the access point acknowledges the NDP feedback sent by the station.

Fig. 12 is a flowchart illustrating another data transmission method according to an embodiment of the present application. The method shown in fig. 12 may enable the access point to more efficiently communicate the data transmission needs of the collecting station to the plurality of stations, and the access point may also receive feedback from the plurality of stations based on the data transmission needs more quickly. The method comprises the following steps.

Step S51, the access point sends a high-frequency buffer report HF BSR trigger frame or a high-frequency service interval request HF SPR trigger frame to the site at a low frequency, and the HF BSR trigger frame or the HF SPR trigger frame is used for asking for a high-frequency buffer from the site in detail.

And step S52, the station receives the HF BSR trigger frame or the HF SPR trigger frame sent by the access point at the low frequency, and the HF BSR trigger frame or the HF SPR trigger frame is used for requesting a high-frequency buffer from the station in detail.

And S53, the site sends an HF BSR frame or an HF SPR frame to the site at a low frequency, wherein the HF BSR frame or the HF SPR frame is sent by the site according to the corresponding resource indication information of the site in the HF BSR triggering frame or the HF SPR triggering frame.

Step S54, the access point receives an HF BSR frame or an HF SPR frame sent by the station at the low frequency, where the HF BSR frame or the HF SPR frame is sent by the station according to the resource indication information corresponding to the station in the HF BSR trigger frame or the HF SPR trigger frame.

Among them, the HF BSR is called High Frequency Buffer Status Report in English, and the Chinese definition is the High Frequency Buffer Report. The English language of HF SPR is called High Frequency Service Period Request, and the Chinese language is defined as High Frequency Service interval Request.

In the embodiment shown in fig. 12, in the embodiment of the present application, a plurality of stations may receive an HF BSR trigger frame or an HF SPR trigger frame at the same time, and it is ensured that the plurality of stations know that an access point requests a high-frequency buffer to the station in detail, and compared with the prior art in which the access point sends a polling frame to each station one by one at a high frequency, the HF BSR trigger frame or the HF SPR trigger frame according to the embodiment of the present application may communicate a request for a high-frequency buffer to the plurality of stations more efficiently, and the access point may receive feedback of the plurality of stations based on the high-frequency buffer more quickly. In addition, the access point of the embodiment of the application sends the HF BSR trigger frame or the HF SPR trigger frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

For example, please refer to fig. 13 and 14, wherein fig. 13 is a schematic diagram of an HF BSR trigger frame or an HF SPR trigger frame, and fig. 14 is a schematic diagram of an HF BSR frame or an HF SPR frame.

In fig. 13, the HF BSR trigger frame or the HF SPR trigger frame includes a common domain and a site-by-site domain, wherein the trigger frame type in the common domain has 4 bits, the 4 bits can indicate the trigger frame of the type 16 by 0000 to 1111, 8 types (0000 to 0111) have been defined so far, and the rest of the values (1000 to 1111) can be used to define the trigger frame as the HF BSR trigger frame or the HF SPR trigger frame.

In fig. 14, after receiving the HF BSR trigger frame or the HF SPR trigger frame shown in fig. 13 sent by the access point, the station may recognize that the trigger frame is an HF BSR trigger frame or an HF SPR trigger frame through the trigger frame type in the public domain, and the trigger frame is used to request a high-frequency buffer in detail to the station, and the station may send the HF BSR frame or the HF SPR frame shown in fig. 14 to the access point to implement feedback on the HF BSR trigger frame or the HF SPR trigger frame sent by the access point, where the HF BSR frame or the HF SPR frame is sent by the station according to resource indication information corresponding to the station in the HF BSR trigger frame or the HF SPR trigger frame. In fig. 14, the HF BSR frame or the HF SPR frame may include a dynamic allocation information field for indicating a high frequency buffer report. The dynamic allocation information field may include fields such as a service identifier, an allocation type, a source association identifier, a destination association identifier, an allocation duration, and a reservation.

Of course, the data frames shown in fig. 28 and 29 may also be employed as the HF BSR frame or the HF SPR frame.

Fig. 15 is a flowchart illustrating another data transmission method according to an embodiment of the present application. The method shown in fig. 15 may enable the access point to transmit the trigger frame of the high-low frequency hybrid scheduling to the station at the low frequency, so as to simultaneously schedule the data transmission of the station at the low frequency and the high frequency. The method comprises the following steps.

And S61, the access point sends a trigger frame of high-frequency and low-frequency hybrid scheduling to the station at low frequency, and when a target identifier exists in the trigger frame of the high-frequency and low-frequency hybrid scheduling, the target identifier is used for indicating that the trigger frame of the high-frequency and low-frequency hybrid scheduling comprises low-frequency user information and high-frequency user information.

And step S62, the station receives the trigger frame of the high-frequency and low-frequency hybrid scheduling sent by the access point at the low frequency.

In the embodiment shown in fig. 15, in the trigger frame of the high-low frequency hybrid scheduling sent by the access point to the station at the low frequency, if the target identifier exists in the trigger frame of the high-low frequency hybrid scheduling, it is described that the trigger frame of the high-low frequency hybrid scheduling includes the low frequency user information and the high frequency user information. Compared with the prior art that the trigger frame can only carry low-frequency user information or high-frequency user information, the trigger frame of the high-low frequency hybrid scheduling in the embodiment of the application can simultaneously carry the low-frequency user information and the high-frequency user information, so that the data transmission of the station at low frequency and high frequency can be simultaneously scheduled through the trigger frame of the high-low frequency hybrid scheduling, and the transmission efficiency is improved. In addition, the access point of the embodiment of the application sends the trigger frame of the high-frequency and low-frequency hybrid scheduling to the station at the low frequency, so that the overhead of a high-frequency channel can be reduced.

In the embodiment shown in fig. 15, the trigger frame of the high-low frequency hybrid scheduling includes a high-low frequency distinguishing identifier, and the high-low frequency distinguishing identifier is used to indicate that the user information in the trigger frame of the high-low frequency hybrid scheduling is low-frequency user information or high-frequency user information.

In the embodiment shown in fig. 15, the high-low frequency distinction identifies at least one of the following three cases in the trigger frame where the high-low frequency hybrid schedule exists:

in the first case, the high-low frequency distinguishing identifier is set in each user information of the trigger frame of the high-low frequency hybrid scheduling, and the high-low frequency distinguishing identifier is an identifier of the low-frequency user information or an identifier of the high-frequency user information.

In the second case, the high and low frequency distinguishing mark is set in the public area of the trigger frame of the high and low frequency hybrid scheduling, and the high and low frequency distinguishing mark is the number of the low frequency user information or the high frequency user information.

In the third case, the high-low frequency distinguishing identifier is arranged between the low-frequency user information and the high-frequency user information of the trigger frame of the high-low frequency hybrid scheduling, and the high-low frequency distinguishing identifier is a separator for separating the low-frequency user information and the high-frequency user information.

For example, please refer to fig. 16, which is a schematic diagram of a trigger frame of the high-low frequency hybrid scheduling shown in fig. 16. In fig. 16, a trigger frame of the high and low frequency hybrid scheduling includes at least common information, at least one low frequency user information, and at least one high frequency user information. Ext> theext> triggerext> frameext> typeext>,ext> theext> HEext> -ext> SIGext> -ext> aext> (ext> highext> efficiencyext> signalingext> fieldext> aext>)ext>,ext> theext> reservedext> fieldext>,ext> orext> theext> reservedext> fieldext> inext> theext> commonext> informationext> ofext> theext> triggerext> frameext> ofext> theext> highext> andext> lowext> frequencyext> hybridext> schedulingext> isext> usedext> toext> indicateext> thatext> theext> triggerext> frameext> isext> aext> triggerext> frameext> forext> performingext> theext> highext> andext> lowext> frequencyext> hybridext> schedulingext>.ext> Ext> furthermoreext>,ext> theext> HEext> -ext> SIGext> -ext> aext> reservedext> fieldext> inext> theext> commonext> informationext> ofext> theext> triggerext> frameext> ofext> theext> highext> andext> lowext> frequencyext> hybridext> schedulingext> orext> theext> commonext> informationext> fieldext> basedext> onext> theext> triggerext> frameext> typeext> isext> usedext> forext> indicatingext> theext> numberext> ofext> theext> highext> frequencyext> userext> informationext> andext> /ext> orext> theext> lowext> frequencyext> userext> informationext>.ext> The user information of the trigger frame of the high-frequency and low-frequency mixed scheduling comprises the scheduling information of the station at low frequency originally contained in the trigger frame and the scheduling information of the newly introduced station at high frequency.

In fig. 16, the trigger frame of the high-low frequency hybrid scheduling includes a high-low frequency distinguishing identifier, and the high-low frequency distinguishing identifier is used to indicate that the user information in the trigger frame of the high-low frequency hybrid scheduling is low-frequency user information or high-frequency user information. The high-low frequency distinguishing mark has at least the following three conditions in the trigger frame of the high-low frequency mixed scheduling:

in the first case, the high-low frequency distinguishing identifier is set in each user information of the trigger frame of the high-low frequency hybrid scheduling, and the high-low frequency distinguishing identifier is an identifier of the low-frequency user information or an identifier of the high-frequency user information. Adding a low-frequency distinguishing identifier in each low-frequency user information of the trigger frame of the high-low frequency hybrid scheduling, adding a high-frequency distinguishing identifier in each high-frequency user information of the trigger frame of the high-low frequency hybrid scheduling, and distinguishing whether the user information is the low-frequency user information or the high-frequency user information by using the high-frequency distinguishing identifier or the low-frequency distinguishing identifier. For example, an LF Flag field is added to the low frequency user information of the trigger frame of the high and low frequency hybrid scheduling in fig. 16 to indicate that the user information is the low frequency user information. As another example, an HF Flag field is added to the high frequency user information of the trigger frame of the high and low frequency hybrid scheduling in fig. 16 to indicate that the user information is high frequency user information.

The first case is exemplified below. For example, the access point adds binary "0" to the LF Flag field of each piece of low-frequency user information in the trigger frame of the high-low frequency hybrid scheduling of fig. 16, and when the station reads binary "0" in the LF Flag field of the low-frequency user information, the station can know that the user information is the low-frequency user information; for another example, the access point adds binary "1" to the HF Flag field of each piece of high-frequency user information in the trigger frame of the high-frequency and low-frequency hybrid scheduling in fig. 16, and when the station reads binary "1" in the HF Flag field of the high-frequency user information, the station can know that the user information is the high-frequency user information.

Of course, in the embodiment of the present application, it is not limited to that "0" represents low frequency user information, and "1" represents high frequency user information, but may also adopt "1" to represent low frequency user information, and "0" to represent high frequency user information, and may also adopt other manners to represent low frequency user information and high frequency user information.

In the second case, the high and low frequency differentiation flag is set in the public area of the trigger frame of the high and low frequency hybrid scheduling, and the high and low frequency differentiation flag is the number of the low frequency user information or the high frequency user information. Ext> forext> exampleext>,ext> anext> HEext> -ext> SIGext> -ext> aext> reservedext> fieldext> inext> theext> commonext> informationext> ofext> theext> triggerext> frameext> ofext> theext> highext> -ext> frequencyext> andext> lowext> -ext> frequencyext> hybridext> schedulingext> indicatesext> thatext> theext> numberext> ofext> theext> lowext> -ext> frequencyext> userext> informationext> isext> mext>,ext> thenext> theext> firstext> mext> userext> informationext> inext> theext> userext> informationext> ofext> theext> triggerext> frameext> ofext> theext> highext> -ext> frequencyext> andext> lowext> -ext> frequencyext> hybridext> schedulingext> areext> lowext> -ext> frequencyext> userext> informationext>,ext> andext> theext> restext> userext> informationext> isext> highext> -ext> frequencyext> userext> informationext>.ext> The second case belongs to the implicit sequential indication.

For the third case, the special identifier AID in the low frequency user information may be used as a separator for separating the low frequency user information and the high frequency user information, the default low frequency user information is prior or the high frequency user information is prior, and the separator is placed between the low frequency user information and the high frequency user information. For example, it is assumed that the low frequency user information is preceding, and there is a special identification AID after all the low frequency user information and before the high frequency user information to separate the low frequency user information and the high frequency user information. As another example, it is assumed that the high frequency user information is previous, and a special identification AID exists after all the high frequency user information and before the low frequency user information to separate the high frequency user information and the low frequency user information. Currently, the standard such as 802.11ac/ax only uses 0 to 1023 as the assignment of the association identification AID, and more than 1024 AIDs are reserved AIDs, so any one of 1024 to 2047 can be used as a special AID to indicate the end of the first category of user information.

In addition, the trigger frame of the high-frequency and low-frequency hybrid scheduling provided in the embodiment of the present application utilizes the special AID of 2047 as an indication of a Padding field, where the Padding field is used to indicate that user information in front of the Padding field is user information of a first category, and user information behind the Padding field is user information of a second category. For example, the user information in front of the Padding field is low frequency user information, and the user information behind the Padding field is high frequency user information; for another example, the user information before the Padding field is high frequency user information, and the user information after the Padding field is low frequency user information.

For the third case, the end of the first category of user information may be indicated by using a reserved MCS (Modulation and Coding Scheme) or a reserved MCS + DCM (Dual Carrier Modulation) combination in the low frequency user information, and the first category of user information may be low frequency user information or high frequency user information. Specifically, the reserved MCS indicates that the MCS field is not completely used up, and currently 802.11ax supports 12 MCSs from MCS0 to MCS11, and 12 to 15 are reserved bits and can be used for escape indication. In addition, the combination of DCM and MCS can be used for indication, DCM only applies to MCS0, MCS1, MCS3 and MCS4 at 802.11ax, and for other MCS, it cannot be indicated at the same time, and the combination not supported can be used for indication.

The access point may indicate that the user information in the trigger frame of the high-frequency and low-frequency hybrid scheduling is low-frequency user information or high-frequency user information by using the above three manners. The low frequency user information may adopt a resource indication of an existing trigger frame, and the high frequency user information may adopt an Allocation field in a DMG Extended Schedule Element adopted in 802.11ad, or an Allocation field in an EDMG (Enhanced directional multi-gigabit) Extended Schedule Element in 802.11ay, or may adopt a combination of the two.

Ext> afterext> theext> stationext> receivesext> theext> triggerext> frameext> ofext> theext> highext> -ext> frequencyext> andext> lowext> -ext> frequencyext> hybridext> schedulingext> sentext> byext> theext> accessext> pointext>,ext> theext> stationext> identifiesext> thatext> theext> triggerext> frameext> isext> theext> triggerext> frameext> ofext> theext> highext> -ext> frequencyext> andext> lowext> -ext> frequencyext> hybridext> schedulingext> throughext> theext> typeext> ofext> theext> triggerext> frameext> inext> theext> triggerext> frameext> ofext> theext> highext> -ext> frequencyext> andext> lowext> -ext> frequencyext> hybridext> schedulingext> orext> theext> indicationext> inext> theext> HEext> -ext> SIGext> -ext> Aext> reservedext> fieldext>.ext> Ext> theext> stationext> identifiesext> theext> amountext> ofext> theext> lowext> frequencyext> userext> informationext> andext> /ext> orext> theext> highext> frequencyext> userext> informationext> throughext> theext> HEext> -ext> SIGext> -ext> aext> reservedext> fieldext> orext> theext> commonext> informationext> fieldext> basedext> onext> theext> triggerext> frameext> typeext>.ext> And identifying whether the user information is low-frequency user information or high-frequency user information through HF/LF Flag, implicit sequence indication or special AID/MCS/DCM + MCS combination in the user information of the trigger frame of the high-frequency and low-frequency mixed scheduling, so that data transmission is carried out at high frequency or low frequency according to the resource indication in the user information.

In the embodiment shown in fig. 16, the embodiment of the present application is also applicable to the case where the access point performs only low frequency scheduling and only high frequency scheduling. If the access point only performs low frequency scheduling, only low frequency user information is included in fig. 16; if the access point only performs high frequency scheduling, only high frequency user information is contained in fig. 16.

Fig. 17 is a flowchart illustrating another data transmission method according to an embodiment of the present application. The method illustrated in fig. 17 may enable an a-MPDU aggregate frame transmitted by an access point to a station at a low frequency to schedule data transmission by the station at both the low and high frequencies. The method comprises the following steps.

Step S71, the access point sends an aggregation media intervention control protocol data unit (A-MPDU) aggregation frame to the site at a low frequency, wherein the A-MPDU aggregation frame comprises a low frequency trigger frame and a first announcement frame, the low frequency trigger frame comprises low frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the first announcement frame comprises high frequency user information.

The low-frequency user information is used for scheduling the station to perform data transmission at a low frequency, and the high-frequency user information is used for scheduling the station to perform data transmission at a high frequency.

And step S72, the station receives the A-MPDU aggregation frame sent by the access point at the low frequency.

Wherein, english of A-MPDU is called gathered MAC protocol data unit, chinese definition is aggregate media intervention control protocol data unit.

In the embodiment shown in fig. 17, the a-MPDU aggregation frame in the embodiment of the present application may simultaneously carry low-frequency user information and high-frequency user information, so that data transmission of a station at low frequency and high frequency may be simultaneously scheduled through the a-MPDU aggregation frame, thereby improving transmission efficiency. In addition, the access point of the embodiment of the application sends the A-MPDU aggregation frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

For example, please refer to fig. 18, which illustrates a schematic diagram of an a-MPDU aggregation frame in fig. 18. In fig. 18, the a-MPDU aggregation frame includes at least a low frequency trigger frame including low frequency user information and a first advertisement frame in which a directional multi-gigabit extension Element (DMG Extended Element) and/or an enhanced directional multi-gigabit extension Element (EDMG Extended Element) includes high frequency user information; the low-frequency user information is used for scheduling the station to perform data transmission at low frequency, and the high-frequency user information is used for scheduling the station to perform data transmission at high frequency.

Fig. 19 is a flowchart illustrating another data transmission method according to an embodiment of the present application. The method shown in fig. 19 may enable the second advertisement frame sent by the access point to the station at the low frequency to schedule data transmission by the station at both the low frequency and the high frequency. The method comprises the following steps.

Step S81, the access point sends a second advertisement frame to the station at a low frequency, where a low frequency trigger information element in an action frame of the second advertisement frame includes low frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the action frame of the second advertisement frame includes high frequency user information.

And step S82, the station receives the second advertisement frame sent by the access point at the low frequency.

In the embodiment shown in fig. 19, the second advertisement frame in the embodiment of the present application may simultaneously carry low frequency user information and high frequency user information, so that data transmission of the station at low frequency and high frequency may be simultaneously scheduled through the second advertisement frame, thereby improving transmission efficiency. In addition, the access point of the embodiment of the application sends the second announcement frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

For example, please refer to fig. 20, fig. 20 is a schematic diagram of a second advertisement frame. In fig. 20, the action frame of the second advertisement frame includes at least a low frequency trigger information Element, a directional multi-gigabit extension Element (DMG Extended Element), and/or an enhanced directional multi-gigabit extension Element (EDMG Extended Element). The low-frequency trigger information element in the action frame of the second announcement frame comprises low-frequency user information, and the directional multi-gigabit extension element and/or the enhanced directional multi-gigabit extension element in the action frame of the second announcement frame comprises high-frequency user information; the low-frequency user information is used for scheduling the station to perform data transmission at low frequency, and the high-frequency user information is used for scheduling the station to perform data transmission at high frequency.

Referring to fig. 21, fig. 21 is a schematic flow chart illustrating a high-frequency and low-frequency channel protection process. In WLAN, before a long data transmission, an access point and a station generally use the interaction of RTS (Request to Send)/MU-RTS (multi-user-Request to Send) and CTS (Clear to Send) to reserve a transmission Opportunity (TXOP) for data transmission. In addition, if the owner of the TXOP wishes to End the TXOP early, CF-End (Contention Free-End) is sent.

In general, transmission rates of low and high frequencies are different, and for example, since the lowest rate of low Frequency OFDM (Orthogonal Frequency Division Multiplexing) transmission is 6Mbps and the high Frequency is several tens of Mbps, high Frequency transmission is usually fast, and Delay (Delay) transmission at the high Frequency is required to ensure that the TXOPs of the high and low frequencies start or end at the same time.

As shown in fig. 21, during the process of transmitting MU-RTS by the access point at low frequency, the access point transmits MU-RTS at high frequency with a corresponding delay time, and causes TXOPs at low frequency and high frequency of the access point to start at the same time; when the access point AP finishes the TXOP of the high frequency and the low frequency, the access point sends the CF-end at the low frequency, and then the access point sends the CF-end at the high frequency through corresponding delay time, so that the high frequency and the low frequency of the station are ensured to receive the CF-end at the same time.

Referring to fig. 22, fig. 22 is a flowchart illustrating a data transmission method according to an embodiment of the present application. The method shown in fig. 22 can start the transmission opportunities for the low and high frequencies of the access point at the same time and ensure that the high and low frequencies of the station are received simultaneously without contention-to-end. The method comprises the following steps:

step S91, when the access point sends a request transmission or a multi-user request transmission to the station at a low frequency, the access point sends the request transmission or the multi-user request transmission to the station at a high frequency through a first target delay time.

Step S92, when the access point finishes sending the transmission opportunities of the high frequency and the low frequency to the station, the access point sends contention-free-end to the station at the low frequency.

And step S93, the access point sends contention-free-end to the station at high frequency through the second target delay time.

In the embodiment shown in fig. 22, not only can the low-frequency and high-frequency transmission opportunities of the access point start at the same time, but also the high-frequency and low-frequency of the station can be guaranteed to receive contention-free-end at the same time.

Referring to fig. 23, fig. 23 is a schematic flow chart of another data transmission method according to an embodiment of the present application. The flow diagram shown in fig. 23 will be briefly described.

First, the access point transmits data to the station at a low frequency (1, 2,3, 4); the access point then transmits data (5, 6,7, 8) at high frequency to the stations; secondly, the access point sends a BAR (Block Acknowledgement Request) or MU-BAR (Multi User-Block Acknowledgement Request) to the station at low frequency, and the station is inquired whether all data (1, 2,3,4,5,6,7, 8) collected at low frequency and high frequency are correct or not in a unified way; again, the station sends a BA (Block Acknowledgement) to the access point at a low frequency, i.e. the BA includes (10011111), where "0" in (10011111) indicates that the data transmission is wrong and needs to be retransmitted and "1" in (10011111) indicates that the data transmission is correct and (10011111) indicates the correctness of the data fed back in the time sequence of the data transmission by the access point. For example, data (2, 3) is transmitted in error, so

bits

2 and 3 in (10011111) are "0", indicating that data (2, 3) is transmitted in error. Thirdly, the access point sends data which is error before, namely data (2, 3), to the station at low frequency; finally, the station sends a BA (Block Acknowledgement) to the access point at low frequency, i.e. the BA includes (11) to indicate that the data (2, 3) received by the station are correct.

In the embodiment shown in fig. 23, the transmissions of the access point and the station are acknowledged and retransmitted by using a low frequency, and resources of a high frequency are used for data transmission, so that the system resource allocation is optimized, and the system efficiency is maximized.

Referring to fig. 24, fig. 24 is a flowchart illustrating another data transmission method according to an embodiment of the present application. The method shown in fig. 24 can enable the transmissions of the access point and the station to use low frequency for acknowledgement and retransmission, use high frequency resources for data transmission, and optimize system resource allocation, thereby maximizing system efficiency. The method comprises the following steps:

and step S101, the access point sends low-frequency data to the station at low frequency.

And step S102, the access point sends high-frequency data to the station at high frequency.

Step S103, the access point sends a block acknowledgement request or a multi-user-block acknowledgement request to the station at low frequency.

And step S104, the access point sends block confirmation aiming at the low-frequency data and the high-frequency data at the low-frequency receiving station.

In the embodiment shown in fig. 24, the transmissions of the access point and the station can be acknowledged and retransmitted by using a low frequency, and resources of a high frequency are used for data transmission, so that the system resource allocation is optimized, and the system efficiency is maximized.

Referring to fig. 25 and fig. 26, fig. 25 is a general flowchart of high-frequency and low-frequency collaboration provided by an embodiment of the present application, and fig. 26 is a partial flowchart of high-frequency and low-frequency collaboration provided by an embodiment of the present application.

In fig. 25 and fig. 26, in combination with the above method embodiment, in the time period when the access point sends the scheduled a-BFT frame to the station at the low frequency and the feedback information of RSSI sent by the access point at the low frequency receiving station, the access point may perform the conventional a-BFT procedure at the high frequency at the same time; in the time period of the SSW trigger frame sent by the access point to the site at low frequency and the SSW ACK frame sent by the access point to the site at low frequency, the access point can simultaneously perform the traditional flow of announcing the transmission interval/data transmission interval at high frequency; in a time period of sending a trigger frame of high-low frequency hybrid scheduling to a station by an access point at a low frequency and confirming blocks of low-frequency data and high-frequency data by the access point at a low-frequency receiving station, the access point can perform a traditional data transmission interval process at a high frequency at the same time. Therefore, the method for high-frequency and low-frequency cooperation provided by the embodiment of the application is compatible with a traditional mechanism, and high-frequency air interface resources are not wasted.

Fig. 27 is a flowchart illustrating another data transmission method according to an embodiment of the present application. The method shown in fig. 27 can save high frequency channel resources by carrying a transmission request field of high frequency data in a data frame. The method comprises the following steps.

Step S111, the station sends a data frame to the access point at a low frequency, where the data frame includes a transmission request field for uplink data and high-frequency data, and the transmission request field for the high-frequency data is used to indicate a request for the station to transmit data at a high frequency.

The data frame comprises at least one of a control identifier, an access category bitmap, a service identifier difference value or a high-frequency transmission time length request.

Step S112, the access point receives the data frame sent by the station at the low frequency.

In the embodiment shown in fig. 27, the station may carry the transmission request field of the high-frequency data in the data frame while sending the uplink data in the data frame to the access point at a low frequency, so that the station may actively carry the transmission request field of the high-frequency data through the data frame without waiting for the access point to send the polling frame, and it is ensured that the access point may learn the request of the station for transmitting the data at the high frequency through the data frame. Compared with the prior art that the access point sends polling frames to each station one by one at high frequency to obtain the request of the station for transmitting data at high frequency, the embodiment of the application saves high-frequency channel resources by carrying the transmission request field of high-frequency data in the data frame.

For example, please refer to fig. 28, fig. 28 is a schematic diagram of a data frame. In fig. 28, the data frame includes fields such as an HTC field, a frame body, and a frame detection sequence, the HTC field includes a control identifier, an access class index bitmap, a service identifier difference, and a high-frequency transmission duration request, and the high-frequency transmission duration request field is used to indicate a request of a station for transmitting data at a high frequency. The station can piggyback a request for transmitting data at high frequency while transmitting uplink data at low frequency. For example, the station may design a control message for feeding back the high-frequency transmission data by using a new control identifier; an Access Class Index bitmap (ACI bitmap) is used to indicate which Access classes of data of 4 Access classes are desired to BE transmitted, and specifically, see table 2, where the 4 Access classes respectively include an Access Class Best Effort (AC _ BE), a Background Access Class Background (AC _ BK), an Access Class Video (AC _ VI), and an Access Class Voice (AC _ VO); the service identification difference (Delta Traffic ID, delta TID) is used for indicating the service identification; the high frequency transmission duration request indicates the duration that the station wishes to transmit at high frequency.

AC_BE	Access Category Best Effort	Best effort access category
			AC_BK	Access Category Background	Access category of a background
AC_VI	Access Category Video	Access category of video
			AC_VO	Access Category Voice	Access category of sound

TABLE 2

For example, please refer to fig. 29, fig. 29 is a schematic diagram of another data frame. In fig. 29, the data frame includes fields of Category, VHE Action, site identification, and high frequency transmission duration request. The data frame shown in fig. 29 may be an Action frame, and the high-frequency transmission duration request field is used to indicate a request of a station for transmitting data at high frequency.

On the basis of the embodiment shown in fig. 4, at least one of the embodiment shown in fig. 6, the embodiment shown in fig. 8, the embodiment shown in fig. 10, the embodiment shown in fig. 12, the embodiment shown in fig. 15, the embodiment shown in fig. 17, the embodiment shown in fig. 19, the embodiment shown in fig. 22, the embodiment shown in fig. 24, or the embodiment shown in fig. 27 may be further combined with the embodiment shown in fig. 4 to constitute a new embodiment.

Fig. 30 is a schematic diagram of a data transmission device according to an embodiment of the present application. Referring to fig. 30, the data transmission apparatus may enable a station that receives a scheduled a-BFT frame to send an SSW frame in a scheduling timeslot allocated by an access point, so as to ensure that the station can complete uplink sector scanning more quickly. The data transmission device comprises the following modules:

a sending module 11, configured to send a scheduling association-beamforming training a-BFT frame to a station at a low frequency, where the scheduling a-BFT frame is used to indicate a scheduling timeslot corresponding to the station in an a-BFT interval;

and the receiving module 12 is configured to scan an SSW frame at a sector sent by the high-frequency receiving station at a scheduling time slot, where the scheduling time slot is determined by the station according to the scheduling a-BFT frame.

The method and the device can avoid the conflict generated by the station due to the competition of the time slots, and the access point can allocate the scheduling time slots corresponding to the A-BFT intervals for the station through the scheduling A-BFT frames, so that the station can send the SSW frames in the scheduling time slots allocated by the access point, and the station can complete the uplink sector scanning more quickly. In addition, the access point of the embodiment of the application sends the scheduling type A-BFT frame to the site at a low frequency, so that the overhead of a high-frequency channel can be reduced.

Optionally, the sending module 11 is further configured to send a low-frequency beacon frame to the station at a low frequency, where the low-frequency beacon frame includes a sending time of the high-frequency beacon frame; the station is also used for sending a high-frequency beacon frame to the station at high frequency according to the sending time;

the receiving module 12 is further configured to receive, at the low frequency receiving station, feedback information indicating RSSI of the low frequency beacon frame and/or the high frequency beacon frame, where the feedback information is used to indicate a low frequency and/or high frequency channel condition of the station.

Optionally, the sending module 11 is further configured to send an SSW trigger frame to the site at a low frequency, where the SSW trigger frame is used to indicate the feedback information of the sector scanning and resource indication information used by a feedback sector scanning acknowledgement SSW ACK frame of the site;

the receiving module 12 is further configured to receive, at the low frequency, an SSW ACK frame sent by the station, where the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame, in the resource unit corresponding to the station according to the physical layer parameter corresponding to the station.

Optionally, the feedback information of sector scanning includes at least one of sector selection, antenna selection, snr report, or whether polling is required;

Optionally, the feedback information of the RSSI includes at least one of a low frequency identifier, a high frequency extension identifier, or a high frequency RSSI;

the high-frequency extension mark is used for indicating whether the sum of the maximum value of the RSSI of the high-frequency beacon frame directionally transmitted by the station at the omnidirectional receiving access point and the target value accords with a high-frequency transmission range.

Referring to fig. 30, the data transmission apparatus according to the embodiment of the present application may enable a station to complete uplink sector scanning faster under the condition of reducing overhead of a high frequency channel. The data transmission device comprises the following modules:

a receiving module 12, configured to receive, at a low frequency, a scheduled a-BFT frame sent by an access point, where the scheduled a-BFT frame is used to indicate a scheduled time slot corresponding to a station in an a-BFT interval;

and the sending module 11 is configured to send, at a high frequency and in a scheduling time slot, a sector scanning SSW frame to the access point, where the scheduling time slot is determined by the station according to the scheduling a-BFT frame.

The method and the device for scheduling the uplink sector scanning can avoid conflict of the station due to competition time slots, and the access point can allocate the scheduling time slots corresponding to the A-BFT intervals for the station through the scheduling A-BFT frames, so that the station can send the SSW frames in the scheduling time slots allocated by the access point, and the station can complete the uplink sector scanning more quickly. In addition, the access point of the embodiment of the application sends the scheduling A-BFT frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

Optionally, the data transmission device further includes an obtaining module;

the receiving module 12 is further configured to receive, at a low frequency, a low frequency beacon frame sent by the access point, where the low frequency beacon frame includes a sending time of the high frequency beacon frame; the access point is also used for receiving a high-frequency beacon frame transmitted by the access point at a high frequency and at a transmission time;

the sending module 11 is further configured to send feedback information of the RSSI of the low frequency beacon frame and/or the high frequency beacon frame to the access point at a low frequency, where the feedback information is used to indicate a channel condition of the station at the low frequency and/or the high frequency.

Optionally, the receiving module 12 is further configured to receive, at a low frequency, an SSW trigger frame sent by the access point, where the SSW trigger frame is used to indicate the feedback information of sector scanning and the resource indication information adopted by the feedback SSW ACK frame of the station;

the sending module 11 is further configured to send an SSW ACK frame to the access point at a low frequency, where the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame, in the resource unit corresponding to the station according to the physical layer parameter corresponding to the station.

Referring to fig. 30, the data transmission apparatus according to an embodiment of the present invention enables an access point to know a low-frequency and/or high-frequency channel condition of a station while reducing high-frequency channel overhead. The data transmission device comprises the following modules:

a sending module 11, configured to send a low-frequency beacon frame to a station at a low frequency, where the low-frequency beacon frame includes sending time of a high-frequency beacon frame; the station is also used for sending a high-frequency beacon frame to the station at high frequency according to the sending time;

a receiving module 12, configured to receive, at a low frequency receiving station, feedback information indicating RSSI of a received signal strength of a low frequency beacon frame and/or a high frequency beacon frame, where the feedback information is used to indicate a low frequency and/or high frequency channel condition of the station.

According to the access point, the access point can know the low-frequency and/or high-frequency channel conditions of the station by the RSSI feedback information of the low-frequency beacon frame and/or the RSSI feedback information of the high-frequency beacon frame sent by the low-frequency receiving station; furthermore, the access point receiving the feedback information of the RSSI at the low frequency can reduce the overhead of the high frequency channel.

Fig. 31 is a schematic diagram of another data transmission device according to an embodiment of the present application. Referring to fig. 31, the data transmission apparatus may allow a station to feed back a channel condition of the station to an access point while reducing high frequency channel overhead. The data transmission device comprises the following modules:

a receiving module 21, configured to receive, at a low frequency, a low frequency beacon frame sent by an access point, where the low frequency beacon frame includes a sending time of a high frequency beacon frame; the high-frequency beacon frame is also used for receiving the high-frequency beacon frame transmitted by the access point at high frequency and at the transmission time;

an obtaining module 22, configured to obtain an RSSI of the low frequency beacon frame and/or the high frequency beacon frame;

a sending module 23, configured to send feedback information of the RSSI of the low frequency beacon frame and/or the high frequency beacon frame to the access point at a low frequency, where the feedback information is used to indicate channel conditions of the low frequency and/or the high frequency of the station.

The station of the embodiment of the application can send the feedback information of the RSSI of the low-frequency beacon frame and/or the high-frequency beacon frame to the access point at a low frequency, so that the access point can know the channel condition of the station; in addition, the station sends the feedback information of the RSSI to the access point at a low frequency, so that the embodiment of the application can reduce the overhead of a high-frequency channel.

Referring to fig. 30, the data transmission apparatus according to the embodiment of the present application may enable an access point to send feedback information of sector scanning to a plurality of stations more efficiently, and may request an SSW ACK frame from the plurality of stations through an SSW trigger frame. The data transmission device comprises the following modules:

a sending module 11, configured to send an SSW trigger frame to a site at a low frequency, where the SSW trigger frame is used to indicate feedback information of sector scanning and resource indication information adopted by a feedback SSW ACK frame of the site;

the receiving module 12 is configured to receive, at the low frequency, an SSW ACK frame sent by the station, where the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame, in the resource unit corresponding to the station according to the physical layer parameter corresponding to the station.

The access point of the embodiment of the application sends the SSW trigger frame to the sites at low frequency, and the access point can enable a plurality of sites to know the feedback information of sector scanning according to the SSW trigger frame, so that the efficiency of sending the feedback information of sector scanning to the plurality of sites by the access point is higher; moreover, the access point can also enable a plurality of stations to know the resource indication information adopted by the feedback frame of the station according to the SSW trigger frame, so that the access point asks for the SSW ACK frame from the plurality of stations through the SSW trigger frame; in addition, the access point of the embodiment of the application sends the SSW trigger frame at a low frequency, so that the overhead of a high-frequency channel can be reduced.

Optionally, the feedback information of sector scanning includes at least one of sector selection, antenna selection, snr report, or whether polling is required; the resource indication information includes at least one of the adopted resource unit, the adopted coding or modulation mode.

a receiving module 12, configured to receive, at a low frequency, an SSW trigger frame sent by an access point, where the SSW trigger frame is used to indicate feedback information of sector scanning and resource indication information adopted by a feedback SSW ACK frame of a station;

the sending module 11 is configured to send an SSW ACK frame to the access point at a low frequency, where the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame, in the resource unit corresponding to the station according to the physical layer parameter corresponding to the station.

The station of the embodiment of the application receives the SSW trigger frame sent by the access point at the low frequency, so that a plurality of stations can know the feedback information of sector scanning according to the SSW trigger frame, and the efficiency of the plurality of stations receiving the feedback information of sector scanning sent by the access point is higher; moreover, a plurality of stations can know the resource indication information adopted by the feedback frame of the station according to the SSW trigger frame, so that the plurality of stations can feed back an SSW ACK frame to the access point according to the SSW trigger frame; in addition, the station receives the SSW trigger frame at a low frequency, so that the channel is more stable, robustness is good, and overhead of a high-frequency channel can be reduced.

Fig. 32 is a schematic diagram of another data transmission device according to an embodiment of the present application. Referring to fig. 32, the data transmission apparatus may enable the access point to more efficiently communicate the data transmission needs of the collecting station to the plurality of stations, and the access point may also more quickly receive feedback from the plurality of stations based on the data transmission needs. The data transmission device comprises the following modules:

the sending module 31 is configured to send a null data packet feedback Report polling NDP feedback Poll trigger frame to the station at a low frequency, where the NDP feedback Report Poll trigger frame is used to collect a data transmission requirement of the station.

The access point of the embodiment of the application sends the NDP feedback Report Poll trigger frame to the sites at a low frequency, so that a plurality of sites can simultaneously receive the NDP feedback Report Poll trigger frame, and the plurality of sites can simultaneously know the data transmission requirements of the access point to collect the sites. In addition, the access point of the embodiment of the application sends the NDP feedback Report Poll trigger frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

Optionally, the NDP feedback Report Poll trigger frame includes a feedback type field; the feedback type field is used for indicating whether the station needs to feed back the low-frequency uplink data transmission requirement; or, the feedback type field is used for indicating whether the station needs to feed back the high-frequency uplink data transmission requirement; or, the feedback type field is used to indicate whether the station needs to feed back whether it wants to upload a service interval request SPR frame to indicate a high frequency uplink requirement; alternatively, the feedback type field is used to indicate whether the station needs to feed back whether it wants to update the uplink alignment.

Fig. 33 is a schematic diagram of another data transmission apparatus according to an embodiment of the present application. Referring to fig. 33, the data transmission apparatus can make a plurality of stations simultaneously know data transmission requirements of stations to be collected by an access point, and the plurality of stations can also transmit feedback based on the data transmission requirements to the access point more quickly. The data transmission device comprises the following modules:

the receiving module 41 is configured to receive, at a low frequency, an NDP feedback Report Poll trigger frame sent by an access point, where the NDP feedback Report Poll trigger frame is used to collect a data transmission requirement of a station.

According to the embodiment of the application, a plurality of stations can simultaneously receive the NDP feedback Report Poll trigger frame, and the plurality of stations can know the data transmission requirements of the stations to be collected by the access point at the same time; moreover, the NDP feedback Report Poll trigger frame in the embodiment of the present application may more efficiently communicate the data transmission requirement of the collection station to a plurality of stations, and the plurality of stations may also more quickly send feedback based on the data transmission requirement to the access point. In addition, the station receives the NDP feedback Report Poll trigger frame sent by the access point at a low frequency, so that the overhead of a high-frequency channel can be reduced.

The present embodiment provides still another data transmission apparatus, which is configured as shown in fig. 30, and the data transmission apparatus can more efficiently communicate a requirement for requesting a high frequency buffer to a plurality of stations, and an access point can also more quickly receive feedback of the plurality of stations based on the high frequency buffer. The data transmission device comprises the following modules:

a sending module 11, configured to send a high-frequency buffer report HF BSR trigger frame or a high-frequency service interval request HF SPR trigger frame to a site at a low frequency, where the HF BSR trigger frame or the HF SPR trigger frame is used to request a detailed high-frequency buffer from the site;

a receiving module 12, configured to receive, at a low frequency receiving station, an HF BSR frame or an HF SPR frame, where the HF BSR frame or the HF SPR frame is sent by the station according to resource indication information corresponding to the station in the HF BSR trigger frame or the HF SPR trigger frame.

The access point of the embodiment of the present application sends the HF BSR trigger frame or the HF SPR trigger frame to the station at a low frequency, so that multiple stations can receive the HF BSR trigger frame or the HF SPR trigger frame at the same time, and it is ensured that multiple stations know that the access point requests the high-frequency cache of the station in detail at the same time. In addition, the access point of the embodiment of the application sends the HF BSR trigger frame or the HF SPR trigger frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

The present embodiment provides still another data transmission apparatus, which has a structure as shown in fig. 30, and a station of the data transmission apparatus can more efficiently receive a request for high-frequency buffering transmitted by an access point, and the station can also more quickly send feedback based on the high-frequency buffering to the access point. The data transmission device comprises the following modules:

a receiving module 12, configured to receive, at a low frequency, an HF BSR trigger frame or an HF SPR trigger frame sent by an access point, where the HF BSR trigger frame or the HF SPR trigger frame is used to request a high-frequency cache from a station in detail;

a sending module 11, configured to send, to the station, an HF BSR frame or an HF SPR frame at a low frequency, where the HF BSR frame or the HF SPR frame is sent by the station according to resource indication information corresponding to the station in the HF BSR trigger frame or the HF SPR trigger frame.

The station of the embodiment of the present application receives the HF BSR trigger frame or the HF SPR trigger frame sent by the access point at the low frequency, so that multiple stations can receive the HF BSR trigger frame or the HF SPR trigger frame at the same time, and guarantee that multiple stations know that the access point requests the station for the high-frequency cache in detail at the same time. In addition, the station of the embodiment of the present application receives the HF BSR trigger frame or the HF SPR trigger frame sent by the access point at the low frequency, which can reduce the overhead of the high frequency channel.

Referring to fig. 32, a structure of a data transmission apparatus is provided in an embodiment of the present application, where a trigger frame of high-low frequency hybrid scheduling sent by an access point to a station at a low frequency may schedule data transmission of the station at low frequency and high frequency simultaneously. The data transmission device comprises the following modules:

a sending module 31, configured to send a trigger frame of high-low frequency hybrid scheduling to a station at a low frequency, where when a target identifier exists in the trigger frame of the high-low frequency hybrid scheduling, the target identifier is used to indicate that the trigger frame of the high-low frequency hybrid scheduling includes low-frequency user information and high-frequency user information; the low-frequency user information is used for scheduling the station to perform data transmission at low frequency, and the high-frequency user information is used for scheduling the station to perform data transmission at high frequency.

In the embodiment of the application, if the target identifier exists in the trigger frame of the high-frequency and low-frequency hybrid scheduling, it is indicated that the trigger frame of the high-frequency and low-frequency hybrid scheduling includes the low-frequency user information and the high-frequency user information. Compared with the prior art that the trigger frame can only carry low-frequency user information or high-frequency user information, the trigger frame of the high-low frequency hybrid scheduling in the embodiment of the application can simultaneously carry the low-frequency user information and the high-frequency user information, so that the data transmission of the station at low frequency and high frequency can be simultaneously scheduled through the trigger frame of the high-low frequency hybrid scheduling, and the transmission efficiency is improved. In addition, the access point of the embodiment of the application sends the trigger frame of the high-frequency and low-frequency hybrid scheduling to the station at the low frequency, so that the overhead of a high-frequency channel can be reduced.

Optionally, the trigger frame of the high-frequency and low-frequency hybrid scheduling includes a high-frequency and low-frequency distinguishing identifier, where the high-frequency and low-frequency distinguishing identifier is used to indicate that the user information in the trigger frame of the high-frequency and low-frequency hybrid scheduling is low-frequency user information or high-frequency user information.

Optionally, the high-low frequency distinguishing identifier is arranged in each user information of the trigger frame of the high-low frequency hybrid scheduling, and the high-low frequency distinguishing identifier is an identifier of the low-frequency user information or an identifier of the high-frequency user information; or the high-low frequency distinguishing identifier is arranged in a public area of a trigger frame of the high-low frequency hybrid scheduling, and the high-low frequency distinguishing identifier is the number of low-frequency user information or high-frequency user information; or, the high-low frequency distinguishing identifier is arranged between the low-frequency user information and the high-frequency user information of the trigger frame of the high-low frequency hybrid scheduling, and the high-low frequency distinguishing identifier is a separator for separating the low-frequency user information and the high-frequency user information.

Referring to fig. 33, a structure of a data transmission apparatus is provided in an embodiment of the present application, where a trigger frame of high-frequency and low-frequency hybrid scheduling sent by a station at a low-frequency receiving access point may schedule data transmission of the station at low frequency and high frequency simultaneously. The data transmission device comprises the following modules:

a receiving module 41, configured to receive, at a low frequency, a trigger frame of high-frequency and low-frequency hybrid scheduling sent by an access point, where when a target identifier exists in the trigger frame of high-frequency and low-frequency hybrid scheduling, the target identifier is used to indicate that the trigger frame of high-frequency and low-frequency hybrid scheduling includes low-frequency user information and high-frequency user information; the low-frequency user information is used for scheduling the station to perform data transmission at low frequency, and the high-frequency user information is used for scheduling the station to perform data transmission at high frequency.

In the embodiment of the application, if the target identifier exists in the trigger frame of the high-frequency and low-frequency hybrid scheduling, it is indicated that the trigger frame of the high-frequency and low-frequency hybrid scheduling includes the low-frequency user information and the high-frequency user information. Compared with the prior art that the trigger frame can only carry low-frequency user information or high-frequency user information, the trigger frame of the high-low frequency hybrid scheduling in the embodiment of the application can simultaneously carry the low-frequency user information and the high-frequency user information, so that the data transmission of the station at low frequency and high frequency can be simultaneously scheduled through the trigger frame of the high-low frequency hybrid scheduling, and the transmission efficiency is improved. In addition, the station receives the trigger frame of the high-frequency and low-frequency hybrid scheduling sent by the access point at the low frequency, so that the overhead of a high-frequency channel can be reduced.

The present embodiment provides still another data transmission apparatus, and the structure of the data transmission apparatus please refer to fig. 32, where an a-MPDU aggregation frame sent by an access point to a station at a low frequency may schedule data transmission of the station at the low frequency and the high frequency simultaneously. The data transmission device comprises the following modules:

a sending module 31, configured to send an aggregate media intervention control protocol data unit a-MPDU aggregate frame to a station at a low frequency, where the a-MPDU aggregate frame includes a low-frequency trigger frame and a first announcement frame, the low-frequency trigger frame includes low-frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the first announcement frame includes high-frequency user information; the low-frequency user information is used for scheduling the station to perform data transmission at low frequency, and the high-frequency user information is used for scheduling the station to perform data transmission at high frequency.

The present embodiment provides still another data transmission apparatus, and the structure of the data transmission apparatus please refer to fig. 33, where a station of the data transmission apparatus receives an a-MPDU aggregation frame sent by an access point at a low frequency, and may schedule data transmission of the station at the low frequency and the high frequency simultaneously. The data transmission device comprises the following modules:

a receiving module 41, configured to receive, at a low frequency, an a-MPDU aggregation frame sent by an access point, where the a-MPDU aggregation frame includes a low frequency trigger frame and a first advertisement frame, the low frequency trigger frame includes low frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the first advertisement frame includes high frequency user information; the low-frequency user information is used for scheduling the station to perform data transmission at low frequency, and the high-frequency user information is used for scheduling the station to perform data transmission at high frequency.

The A-MPDU aggregation frame in the embodiment of the application can simultaneously carry low-frequency user information and high-frequency user information, so that the data transmission of the station at low frequency and high frequency can be simultaneously scheduled through the A-MPDU aggregation frame, and the transmission efficiency is improved. In addition, the station receives the A-MPDU aggregation frame sent by the access point at the low frequency, so that the overhead of a high-frequency channel can be reduced.

In another embodiment of the present application, referring to fig. 32, a structure of a data transmission apparatus is provided, where a second advertisement frame sent by an access point to a station at a low frequency can schedule data transmission of the station at the low frequency and the high frequency at the same time. The data transmission device comprises the following modules:

a sending module 31, configured to send a second advertisement frame to the station at a low frequency, where a low-frequency trigger information element in an action frame of the second advertisement frame includes low-frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the action frame of the second advertisement frame includes high-frequency user information; the low-frequency user information is used for scheduling the station to perform data transmission at low frequency, and the high-frequency user information is used for scheduling the station to perform data transmission at high frequency.

The second announcement frame in the embodiment of the application can simultaneously carry low-frequency user information and high-frequency user information, so that the data transmission of the station at low frequency and high frequency can be simultaneously scheduled through the second announcement frame, and the transmission efficiency is improved. In addition, the access point of the embodiment of the application sends the second announcement frame to the station at a low frequency, so that the overhead of a high-frequency channel can be reduced.

In another embodiment of the present application, referring to fig. 33, a data transmission apparatus is provided, where a station of the data transmission apparatus receives a second advertisement frame sent by an access point at a low frequency, and can schedule data transmission of the station at the low frequency and the high frequency simultaneously. The data transmission device comprises the following modules:

a receiving module 41, configured to receive, at a low frequency, a second advertisement frame sent by an access point, where a low-frequency trigger information element in an action frame of the second advertisement frame includes low-frequency user information, and a directional multi-gigabit extension element and/or an enhanced directional multi-gigabit extension element in the action frame of the second advertisement frame includes high-frequency user information; the low-frequency user information is used for scheduling the station to perform data transmission at low frequency, and the high-frequency user information is used for scheduling the station to perform data transmission at high frequency.

The second announcement frame in the embodiment of the application can simultaneously carry low-frequency user information and high-frequency user information, so that the data transmission of the station at low frequency and high frequency can be simultaneously scheduled through the second announcement frame, and the transmission efficiency is improved. In addition, the station of the embodiment of the application receives the second announcement frame sent by the access point at a low frequency, so that the overhead of a high-frequency channel can be reduced.

Fig. 34 is a schematic diagram of another data transmission device according to an embodiment of the present application. Referring to fig. 34, the apparatus includes a processor 51, a memory 52 and a transceiver 53, wherein the processor 51, the memory 52 and the transceiver 53 communicate with each other through an internal connection path, the memory 52 is used for storing instructions, the processor 51 is used for executing the instructions stored in the memory 52 to control the transceiver 53 to receive signals and control the transceiver 53 to transmit signals, and when the processor 51 executes the instructions stored in the memory 52, the apparatus causes the processor 51 to execute the methods shown in fig. 4, 6, 8, 10, 12, 15, 17, 19, 22, 24 and 27.

Embodiments of the present application provide a computer-readable storage medium having stored therein instructions, which when executed on a computer, cause the computer to perform the methods illustrated in fig. 4, 6, 8, 10, 12, 15, 17, 19, 22, 24, and 27 described above.

Embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method illustrated in fig. 4, 6, 8, 10, 12, 15, 17, 19, 22, 24 and 27 described above.

Embodiments of the present application provide a chip, which includes a processor and/or program instructions, and when the chip is operated, the method shown in fig. 4, fig. 6, fig. 8, fig. 10, fig. 12, fig. 15, fig. 17, fig. 19, fig. 22, fig. 24, and fig. 27 is implemented.

It should be noted that the embodiments provided in the present application are only optional embodiments described in the present application, and those skilled in the art can design many more embodiments based on the embodiments, so that the detailed description thereof is omitted here.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is only a logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of data transmission, the method comprising:

the access point sends a low-frequency beacon frame to the station at a low frequency, wherein the low-frequency beacon frame comprises the sending time of a high-frequency beacon frame;

the access point transmits the high-frequency beacon frame to the station at high frequency according to the transmission time;

the access point receives a sector scanning SSW frame sent by the station in the scheduling time slot at high frequency, wherein the scheduling time slot is determined by the station according to the scheduling A-BFT frame;

wherein the A-BFT frame comprises a Source association identification (Source AID) field, an Allocation Start Allocation Type field and/or an Allocation Type field; the Source AID field is used for indicating the associated identification information of the station, and is used for identifying the scheduling time slot belonging to the station by the station; the Allocation Start field is used for indicating the time of the Start of the scheduling time slot; and the Allocation Type field is used for indicating the scheduling time slot to be used for carrying out the scanning training of the uplink sector of the A-BFT.

2. The data transmission method of claim 1, wherein the access point transmits the scheduled a-BFT frame to the station at a low frequency, the method further comprising:

and the access point receives feedback information of Received Signal Strength Indication (RSSI) of the low-frequency beacon frame and/or the high-frequency beacon frame sent by the station at a low frequency, wherein the feedback information is used for indicating the low-frequency and/or high-frequency channel condition of the station.

3. The data transmission method according to claim 1, wherein after the access point receives the SSW frame sent by the station in the scheduled time slot at a high frequency, the method further comprises:

the access point sends an SSW trigger frame to the site at a low frequency, wherein the SSW trigger frame is used for indicating feedback information of sector scanning and resource indication information adopted by a feedback sector scanning acknowledgement SSW ACK frame of the site;

and the access point receives an SSW ACK frame sent by the station at a low frequency, wherein the SSW ACK frame is sent by the station according to the resource indication information corresponding to the station in the SSW trigger frame and the physical layer parameters corresponding to the station.

4. The data transmission method according to claim 3, characterized in that:

5. The data transmission method according to claim 2, characterized in that:

the high-frequency identification is used for indicating whether the maximum RSSI value of the high-frequency beacon frame directionally transmitted by the access point and received by the station in the omnidirectional mode accords with a high-frequency transmission range or not;

the high-frequency extension mark is used for indicating whether the sum of the maximum value of the RSSI of the high-frequency beacon frame directionally transmitted by the access point and a target value is in accordance with a high-frequency transmission range or not when the station receives the high-frequency beacon frame directionally transmitted by the access point in the omnidirectional mode.

6. A method of data transmission, the method comprising:

the station receives the high-frequency beacon frame transmitted by the access point at high frequency and at the transmission time;

the station receives a scheduling type A-BFT frame sent by the access point at a low frequency, wherein the scheduling type A-BFT frame is used for indicating a scheduling time slot corresponding to the station in an A-BFT interval;

the station sends a sector scanning SSW frame to the access point at high frequency and in the scheduling time slot, wherein the scheduling time slot is determined by the station according to the scheduling A-BFT frame;

7. The data transmission method according to claim 6, wherein the station, before receiving the scheduled A-BFT frame transmitted by the access point at a low frequency, further comprises: the station acquires the RSSI of the low-frequency beacon frame and/or the high-frequency beacon frame;

and the station sends the low-frequency beacon frame and/or the high-frequency beacon frame RSSI feedback information to the access point at a low frequency, wherein the feedback information is used for indicating the low-frequency and/or high-frequency channel condition of the station.

8. The data transmission method according to claim 6, wherein the station transmits the SSW frame to the access point at a high frequency and in the scheduled time slot, the method further comprising:

the station receives an SSW trigger frame sent by the access point at a low frequency, wherein the SSW trigger frame is used for indicating feedback information of sector scanning and resource indication information adopted by a feedback SSW ACK frame of the station;

9. The data transmission method according to claim 8, wherein:

10. A data transmission apparatus, characterized in that the apparatus comprises:

the system comprises a sending module, a receiving module and a sending module, wherein the sending module is used for sending a low-frequency beacon frame to a station at a low frequency, and the low-frequency beacon frame comprises the sending time of a high-frequency beacon frame;

the transmitting module is further configured to transmit the high-frequency beacon frame to the station at a high frequency according to the transmission time;

the sending module is further configured to send a scheduling association-beamforming training a-BFT frame to a station at a low frequency, where the scheduling a-BFT frame is used to indicate a scheduling timeslot corresponding to the station in an a-BFT interval;

a receiving module, configured to receive, at a high frequency, a sector scanning SSW frame sent by the station in the scheduling timeslot, where the scheduling timeslot is determined by the station according to the scheduling a-BFT frame;

wherein the A-BFT frame comprises a Source association identification (Source AID) field, an Allocation Start Allocation Type field and/or an Allocation Type field; the Source AID field is used for indicating the association identification information of the station, and is used for the station to identify the scheduling time slot belonging to the station; the Allocation Start field is used for indicating the time of the Start of the scheduling time slot; and the Allocation Type field is used for indicating the scheduling time slot to be used for carrying out the scanning training of the uplink sector of the A-BFT.

11. The data transmission apparatus of claim 10, wherein:

the receiving module is further configured to receive, at a low frequency, feedback information of a received signal strength indication RSSI of the low frequency beacon frame and/or the high frequency beacon frame sent by the station, where the feedback information is used to indicate a low frequency and/or high frequency channel condition of the station.

12. The data transmission apparatus according to claim 10, wherein:

the receiving module is further configured to receive, at a low frequency, an SSW ACK frame sent by the station, where the SSW ACK frame is sent by the station in a resource unit corresponding to the station according to the physical layer parameter corresponding to the station according to the resource indication information corresponding to the station in the SSW trigger frame.

13. The data transmission apparatus according to claim 12, wherein:

the feedback information of the sector scanning comprises at least one of sector selection, antenna selection, signal-to-noise ratio report or whether polling is needed;

14. The data transmission apparatus according to claim 11, wherein:

the high-frequency identification is used for indicating whether the maximum RSSI value of a high-frequency beacon frame directionally transmitted by the station at the omnidirectional receiving access point accords with a high-frequency transmission range or not;

15. A data transmission apparatus, characterized in that the apparatus comprises:

the receiving module is used for receiving a low-frequency beacon frame sent by the access point at a low frequency, wherein the low-frequency beacon frame comprises the sending time of a high-frequency beacon frame;

the receiving module is further configured to receive the high-frequency beacon frame sent by the access point at a high frequency and at the sending time;

the receiving module is further configured to receive a scheduling a-BFT frame sent by the access point at a low frequency, where the scheduling a-BFT frame is used to indicate a scheduling timeslot corresponding to a station in an a-BFT interval;

a sending module, configured to send a sector scanning SSW frame to the access point at a high frequency and at the scheduling time slot, where the scheduling time slot is determined by the station according to the scheduling a-BFT frame;

16. The data transmission apparatus of claim 15, further comprising an acquisition module, wherein:

the acquisition module is configured to acquire the RSSI of the low frequency beacon frame and/or the high frequency beacon frame;

the sending module is further configured to send, to the access point at a low frequency, feedback information of the RSSI of the low-frequency beacon frame and/or the high-frequency beacon frame, where the feedback information is used to indicate a low-frequency and/or high-frequency channel condition of the station.

17. The data transmission apparatus of claim 15, wherein:

the receiving module is further configured to receive, at a low frequency, an SSW trigger frame sent by the access point, where the SSW trigger frame is used to indicate feedback information of sector scanning and resource indication information adopted by a feedback SSW ACK frame of the station;

the sending module is further configured to send, at a low frequency, an SSW ACK frame to the access point, where the SSW ACK frame is sent by the station in the resource unit corresponding to the station according to the physical layer parameter corresponding to the station according to the resource indication information corresponding to the station in the SSW trigger frame.

18. The data transmission apparatus of claim 17, wherein: