WO2022222488A1

WO2022222488A1 - Wireless communication method and apparatus, and station and access point

Info

Publication number: WO2022222488A1
Application number: PCT/CN2021/136261
Authority: WO
Inventors: 顾祥新
Original assignee: 展讯通信（上海）有限公司
Priority date: 2021-04-21
Filing date: 2021-12-08
Publication date: 2022-10-27
Also published as: CN115226241A

Abstract

Disclosed in the embodiments of the present application are a wireless communication method and apparatus, and a station and an access point. The method comprises: an access point sending a first-type trigger frame to a station, wherein the first-type trigger frame is used for triggering uplink orthogonal frequency division multiple access based random access (UORA) of a first-type station and a second-type station; the station acquiring the first-type trigger frame from the access point; the station sending a second-type physical layer protocol data unit to the access point by means of UORA; and the access point acquiring the second-type physical layer protocol data unit from the station. Since the station is a first-type station, the first-type station chooses to send a second-type PPDU, thereby facilitating the prevention of a collision with data which is sent by a second-type station. In addition, since it is not necessary to isolate resources for bearing the second-type PPDU sent by the first-type station from resources for bearing the second-type PPDU sent by the second-type station, it is conducive to improving the resource utilization rate.

Description

Wireless communication method and apparatus, station and access point

technical field

The present application relates to the field of communication technologies, and in particular, to a wireless communication method and device, a site, and an access point.

Background technique

The IEEE 802.11 series of protocol standards for wireless local access network (WLAN) developed by the Institute of Electrical and Electronics Engineers (IEEE) are constantly evolving and developing. Among them, IEEE 802.11ax can be called high efficiency (HE), and orthogonal frequency division multiple access (OFDMA) technology has been introduced, and OFDMA technology can support access point-like sites (access point station, AP STA, also referred to as AP for short) simultaneously transmits uplink data with multiple non-access point-type stations (none AP station, non-AP STA). At the same time, IEEE802.11ax also introduced an OFDMA-based uplink random access (UORA) mechanism to solve the problem of inflexible resource unit (RU) settings and real-time periodicity in the uplink random access process. When services compete freely, a large number of users collide seriously, and the power of non-AP STAs is lower than that of APs and cannot be associated.

Currently, IEEE is developing next-generation WLAN communication standards, such as IEEE 802.11be. Among them, IEEE 802.11be can be called extremely high throughput (EHT), which will significantly improve the peak throughput rate and transmission rate. Due to the need for backward compatibility between various WLAN communication standards, in the case where the next-generation WLAN communication standards such as IEEE 802.11be are compatible with IEEE 802.11ax, an AP in a basic service set may be compatible with the non-communication standard supporting the next-generation WLAN communication standard. -AP STA (such as non-AP EHT STA) transmits uplink data, and may also transmit uplink data with non-AP STA (such as non-AP HE STA) supporting IEEE 802.11ax at the same time. It can be seen that there may be a problem of data collision on the channel for simultaneous uplink data transmission.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a wireless communication method and device, a site, and an access point, so as to avoid data collision and improve resource utilization.

In a first aspect, an embodiment of the present application provides a wireless communication method, including:

The station obtains a trigger frame of the first type, and the trigger frame of the first type is used to trigger the uplink random access UORA based on orthogonal frequency division multiple access for the station of the first type and the station of the second type, and the station is of the first type site;

The station sends a second type of physical layer protocol data unit PPDU through the UORA.

In a second aspect, an embodiment of the present application provides a wireless communication determination method, including:

The access point sends a trigger frame of the first type, and the trigger frame of the first type is used to trigger the uplink random access UORA based on orthogonal frequency division multiple access for the first type of station and the second type of station, and the access point is the first type of trigger frame. A type of access point;

The access point acquires a physical layer protocol data unit PPDU of the second type.

In a third aspect, an embodiment of the present application provides a wireless communication device, where the device includes a processing unit and a communication unit, where the processing unit is configured to:

Acquire a trigger frame of the first type by the communication unit, where the trigger frame of the first type is used to trigger the uplink random access UORA based on orthogonal frequency division multiple access for the first type of station and the second type of station;

A second type of physical layer protocol data unit PPDU is sent through the communication unit and the UORA.

In a fourth aspect, an embodiment of the present application provides a wireless communication device, where the device includes a processing unit and a communication unit, where the processing unit is configured to:

Send a trigger frame of the first type by the communication unit, where the trigger frame of the first type is used to trigger the uplink random access UORA based on orthogonal frequency division multiple access for the first type of station and the second type of station;

The second type of physical layer protocol data unit PPDU is acquired through the communication unit.

In a fifth aspect, embodiments of the present application provide a site, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured by the The processor is executed, and the one or more programs include instructions for executing the steps in the first aspect of the embodiments of the present application.

In a sixth aspect, embodiments of the present application provide an access point, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured Executed by the processor, the one or more programs include instructions for performing the steps in the second aspect of the embodiments of the present application.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the program as described in the embodiments of the present application some or all of the steps described in the first aspect or the second aspect.

In an eighth aspect, an embodiment of the present application provides a computer program, wherein the computer program is operable to cause a computer to perform some or all of the steps described in the first aspect or the second aspect of the embodiment of the present application. The computer program may be a software installation package.

It can be seen that, in the embodiment of the present application, in the embodiment of the present application, the access point sends the first type of trigger frame to the station, and the first type of trigger frame is used to trigger the UORA of the first type of station and the second type of station; Acquire the trigger frame of the first type from the access point, and send the PPDU of the second type through the UORA. Since the station is a first-type station, and both the first-type station and the second-type station need to use their own type of PPDU to respond to the first-type trigger frame, the second-type station usually uses the second-type PPDU to respond to the first-type trigger frame. The first type of trigger frame responds. Therefore, in order to avoid collision between the PPDU sent by the first type of station and the PPDU sent by the second type of station, the first type of station in this embodiment of the present application chooses to send the second type of PPDU. Although the station of the first type and the station of the second type transmit the same PPDU of the second type, the access point can successfully receive it, which is beneficial to avoid the occurrence of data collision. In addition, since the first-type station and the second-type station send the same second-type PPDU, there is no need for the resources that carry the second-type PPDU sent by the first-type station and the second-type PPDU that bears the second-type station to send. The resources of the PPDU are isolated, which is beneficial to improve resource utilization.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present application. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a wireless communication system provided by an embodiment of the present application;

2 is a schematic flowchart of a UORA process provided in an embodiment of the present application;

3 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application;

4 is a block diagram of functional units of a wireless communication device provided by an embodiment of the present application;

FIG. 5 is a block diagram of functional units of another wireless communication device provided by an embodiment of the present application;

6 is a schematic structural diagram of a site provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an access point provided by an embodiment of the present application.

Detailed ways

In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application are described below with reference to the accompanying drawings in the embodiments of the present application. It is obvious that the described embodiments are some, but not all, embodiments of the present application. With regard to the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, software, product or device comprising a series of steps or units is not limited to the steps or units listed, but also includes steps or units not listed, or also includes , other steps or units inherent in the product or equipment.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

It should be noted that the "connection" in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection to realize communication between devices, which is not limited in any way. "Network" and "system" appearing in the embodiments of this application express the same concept, and a communication system is a communication network.

The embodiments of the present application may be applied to a wireless local area network (Wireless Local Area Network, WLAN). At present, the protocol standard adopted by WLAN is the IEEE 802.11 series. The WLAN may include multiple basic service sets (basic service sets, BSSs), and the devices in the basic service sets may include access point stations (access point stations, AP STAs, also referred to as APs) and non-access points Class site (none access point station, non-AP STA). Additionally, each basic service set may contain one AP and at least one non-AP STA.

Specifically, an access point-like station (AP) may be an entity that provides network access for non-AP STAs connected thereto via a wireless medium. APs can be called wireless access points or hotspots, etc. The AP can connect each wireless network client to the Ethernet. The AP may be a wireless fidelity (Wireless Fidelity, WiFi) chip network device. The AP may be a device that supports the IEEE 802.11 communication standard. For example, the AP may support devices of IEEE 802.11ac, IEEE 802.11n, IEEE 802.11g, IEEE 802.11b, IEEE802.11ax, IEEE802.11be, next-generation WLAN communication standards, and the like. The AP may include a centralized controller, a base station (BS), a base transceiver station (BTS), or a site controller.

Further, the AP may include a device, such as a system-on-a-chip, which has a function of providing wireless communication for a non-access point type station (non-AP STA). Wherein, the chip system may include chips, and may also include other discrete devices, such as transceiver devices and the like.

Further, the AP can communicate with an Internet Protocol (Internet Protocol, IP) network. For example, the Internet, a private IP network or other data network, etc.

Specifically, a non-AP type station (non-AP STA) may be a wireless communication chip, a wireless sensor or a wireless communication terminal. For example, user equipment (UE), remote/remote terminal (remote UE), access terminal, subscriber unit, subscriber station, mobile device, user terminal, smart terminal, wireless communication device supporting Wi-Fi communication function , user agent or user device/cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld Devices, vehicle-mounted devices, wearable devices, etc., which are not specifically limited. It should be noted that, in this embodiment of the present application, non-AP STAs are collectively referred to as stations (STAs).

Further, non-AP STAs may include non-access point enhanced high throughput stations (none AP extremely high throughput station, non-AP EHT STA) and non-access point high efficiency stations (none AP high efficiency station, non-AP EHT STA) AP HE STA), etc.

Further, the non-AP STA may include a device with a transceiving function, such as a system-on-a-chip. Wherein, the chip system may include chips, and may also include other discrete devices, such as transceiver devices and the like.

Currently, IEEE is developing next-generation WLAN communication standards, such as IEEE 802.11be. Among them, IEEE 802.11be can be called extremely high throughput (EHT), which will significantly improve the peak throughput rate and transmission rate. Due to the need for backward compatibility between various WLAN communication standards, in the case where the next-generation WLAN communication standards such as IEEE 802.11be are compatible with IEEE 802.11ax, an AP in a basic service set may be compatible with the non-communication standard supporting the next-generation WLAN communication standard. -AP STA (such as non-AP EHT STA) transmits uplink data, and may also transmit uplink data with non-AP STA (such as non-AP HE STA) supporting IEEE 802.11ax at the same time.

In combination with the above description, the following embodiments of the present application provide an exemplary description for a wireless communication system that supports both non-AP EHT STA and non-AP HE STA in an AP in a basic service set.

Illustratively, for the wireless communication system according to the embodiment of the present application, please refer to FIG. 1 . Wireless communication system 10 may include access point 110 , station 120 and station 130 . Wherein, the station 120 can be a non-AP EHT STA, the station 130 can be a non-AP HE STA, the access point 110 can provide communication coverage for a specific geographical area, and can communicate with the

stations

120 and 130 located within the communication coverage area. to communicate.

Optionally, the wireless communication system 10 may further include multiple access points, and the communication coverage of each access point may include a certain number of stations, which is not specifically limited.

Optionally, the wireless communication system 10 may also include other network entities such as an access network (radio access network, RAN) device, a core network (core network, CN) device, a network controller, a mobility management entity, etc., which are not specifically limited. .

Optionally, the communication between the access point and the station in the wireless communication system 10 may be wireless communication or wired communication, which is not specifically limited.

Before the detailed introduction of the wireless communication method provided by the embodiments of the present application, the related content involved in the embodiments of the present application will be introduced.

1. Primary channel and secondary channel

In WLAN communication, channels are usually divided into primary channels and secondary channels, wherein, secondary channels may contain one or more sub-channels.

For example, if WLAN is divided with 20MHz as the basic bandwidth unit, when the channel bandwidth is 20MHz, there is only one main channel with a bandwidth of 20MHz; when the channel bandwidth is greater than 20MHz, it includes a channel with a bandwidth of 20MHz as the main channel, and the rest at least one 20MHz channel is a slave channel.

For another example, if the channel bandwidth is 320MHz, the 320MHz channel includes a primary 160MHz channel (primary 160MHz channel) and a secondary 160MHz channel (secondary 160MHz channel). Then, the 320MHz channels are sequentially numbered as channel 1 to channel 16, and each serial number represents a 20MHz channel. Among them, channel 1 represents a primary 20MHz channel (primary 20MHz channel, referred to as P20). Channel 2 represents a secondary 20MHz channel (secondary 20MHz channel, S20 for short). A secondary 40MHz channel (S40 for short) includes two sub-channels with a bandwidth of 20MHz, which are channel 3 and channel 4 respectively. A secondary 80MHz channel (S80 for short) contains four sub-channels with a bandwidth of 20MHz, namely channel 5, channel 6, channel 7 and channel 8, wherein channel 5 and channel 6, channel 6 and channel 7, Channels 7 and 8 are adjacent, respectively. A primary 160MHz channel includes channels 1 to 8, and a secondary 160MHz channel includes channels 9 to 16. It can be understood that a secondary 160MHz channel means that the bandwidth of the secondary channel is 160MHz, and a primary 160MHz channel means that the bandwidth of the primary channel is 160MHz.

2. Trigger frame

The trigger frame belongs to a media access control (MAC) frame and may include a frame control (frame control) field, a duration (duration) field, a receiver address (RA) field, and a transmitter address (transmission address) field. , TA) field, at least one of a common information (common information) field, a user information (user information) field, a padding field, and a frame check sequence (frame check sequence, FCS) field.

It should be noted that different IEEE 802.11 communication standards may have different specifications for the fields carried by the trigger frame. For example, the trigger frame of the first type in the embodiment of the present application may be different from the trigger frame in IEEE 802.11ax.

The RA field may indicate the receiver address of the trigger frame. When the trigger frame triggers the uplink and downlink transmission of a station, the RA field may indicate the MAC address of the corresponding station. When the trigger frame triggers uplink and downlink transmission of multiple stations, the RA field may indicate a broadcast address.

The TA field may indicate the transmitter address of the trigger frame. When the AP that transmits the trigger frame does not use multiple BSSIDs, the TA field may indicate the MAC address of the AP that transmits the trigger frame.

The common information field may indicate information required by at least one station triggered by the trigger frame to send a response to the trigger frame.

The user information field may respectively indicate information required by each of the plurality of stations triggered by the trigger frame to transmit a response to the trigger frame. Specifically, the trigger frame may include multiple user information fields.

The user information field may indicate the station triggered by the trigger frame. Specifically, when the user information field includes an association identifier (association identifier, AID) of a site or a part of the AID, the site corresponding to the AID may be a site triggered by a trigger frame. For example, the AID12 subfield in the user information field may indicate the 12 least significant bits (LSBs) of the AID of the station triggered by the trigger frame.

The user information field may indicate the RU allocated to the station triggered by the trigger frame. A RU may indicate multiple subcarriers for uplink and downlink transmissions. In addition, the RU allocation subfield in the user information field may indicate the starting RU of one or more consecutive RUs allocated by the user information field.

The padding field may include padding bits. The padding field may be used to ensure the time when the station sending the response frame to the trigger frame prepares the transmission of the response frame. Therefore, the length of the padding field may be determined according to the capability of the station sending the response frame to the trigger frame. Additionally, trigger frames may not include padding fields.

APs can use trigger frames to trigger stations for uplink transmissions. Specifically, the AP may trigger random access to the designated RU. For example, the AP may set the AID12 subfield of the user information field in the trigger frame to a predetermined value. When the user information field in the trigger frame indicates an AID of a predetermined value, the station receiving the trigger frame can randomly access the RU indicated by the corresponding user information field. Wherein, the predetermined value may be 0 or 2045.

3. Uplink OFDMA-based Random Access (UORA) mechanism based on orthogonal frequency division multiple access

In some scenarios, access points may have problems communicating with multiple sites. For example, an access point has 10dB or more power than a station, which will cause the station to hear the beacon frames sent by the access point, but not be able to associate with the access point. Or, for aperiodic real-time services, the overhead of round-robin scheduling is large, and the collision is serious when a large number of STAs compete freely. Alternatively, since a site only supports one resource unit (RU), and the RU setting is not particularly flexible, this will often lead to the problem of poor RU allocation during the scheduling process. Therefore, in order to solve the problem of the above scenarios, IEEE 802.11ax introduced UORA.

4. UORA-based random access

It should be noted that the access point may send a trigger frame for random access, and the AID12 subfield of the user information field in the trigger frame is set to 0 to indicate one or more available (eligible) RA-RUs to It is used by non-AP STAs associated with it, and the AID12 subfield of the User Information field in the trigger frame is set to 2045 to indicate one or more available RA-RUs for use by non-AP STAs not associated with it.

Among them, the available RA-RU refers to the RA-RU that the non-AP STA supports all transmission parameters indicated in the public information field and the user information field, and can be used to carry HE TB PPDU, and should meet at least one of the following conditions one:

The non-AP STA can be a STA that is not associated with the AP, and the AID12 subfield value of the user information field corresponding to the RA-RU is set to 2045;

A non-AP STA may be an STA associated with an AP, and the value of the AID12 subfield of the user information field corresponding to the RA-RU is set to 0.

Specifically, before receiving the trigger frame from the access point, the station may randomly select an integer value from the uniform distribution of the value range of the OFDMA contention window (OFDMA contention window, OCW). The OCW value ranges from 0 to the OCW value, and the OCW value may be greater than or equal to the OCW minimum value (OCWmin) and less than or equal to the OCW maximum value (OCWmax). The station sets the selected integer value as the value of an OFDMA random access backoff (OFDMA random access backoff, OBO) counter.

Specifically, the station may receive the trigger frame from the access point, and decrement the value of the OBO counter based on the number of RUs in the available RA-RUs allocated by the trigger frame for random access. When the value of the OBO counter is decremented to 0, the station may randomly select an RU from the allocated RU set, and attempt to transmit uplink data through the selected RU. Wherein, the station may determine whether the selected RU is idle through physical carrier sensing or virtual carrier sensing. If the RU is idle, the station can transmit uplink data through the RU; if the RU is busy, the station can not transmit uplink data on the RU, and the station should reset the OBO counter The value of is set to an integer value randomly selected from a uniform distribution within the OCW value.

Specifically, the access point can set OCWmin and OCWmax by sending a UORA parameter set element (UORA parameter set element) to the station through management frames such as beacon frames and probe response frames. In addition, when a station attempts random access for the first time, the station may receive the UORA parameter set element from the access point, or the station may transmit successfully through random access, which may allow the station to initiate the OBO procedure. Wherein, the OBO initialization may include at least one of the initialization of the OBO counter and the initialization of the OCW value. Additionally, when a site initializes the OCW value, the site may set the OCW value to OCWmin or a default value. When the random access transmission of the station fails, the station may update the OCW value to (2×OCW value+1), thereby updating the value range of the OCW. Subsequently, the station randomly selects an integer value from the uniform distribution of the updated OCW value range, and then sets the integer value as the value of the OBO counter, thereby implementing the update of the value of the OBO counter. In addition, when the OCW value reaches OCWmax, even if the random access transmission of the station fails, the station continues to maintain the OCW value as OCWmax.

Specifically, if carrier sense is required and the selected RU is busy, the non-AP STA will not send the HE TB PPDU, and the non-AP STA should set the value of its OBO counter from 0 to the OCW value A randomly chosen integer from the uniform distribution of .

Specifically, if the non-AP STA sends the HE TB PPDU in the RA-RU, but does not receive a response (ACK) from the AP for the HE TB PPDU, the transmission is considered unsuccessful. Otherwise, the transfer is considered successful. After successfully sending the HE TB PPDU in the RA-RU, the non-AP HE STA needs to set the OCW value to the latest OCWmin indicated from the AP's UORA Parameter Set element or the default value (if the UORA Parameter Set element is not received), and Initializes its OBO counter to an integer value randomly chosen from a uniform distribution within the OCW value from 0.

5. Example of UORA process

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a UORA process provided by an embodiment of the present application.

Before AP sends trigger frame 1:

The value of the initial OBO counter of the first station (STA 1) is 3, the value of the initial OBO counter of the second station (STA 2) is 5, and the value of the initial OBO counter of the third station (STA 3) The value is 4, and the value of the initial OBO counter of the fourth station (STA 4) is 2.

After receiving trigger frame 1:

Trigger frame 1 allocates three available RA-RUs, namely RU1, RU2, and RU3, for the stations associated with the AP. At the same time, trigger frame 1 allocates two available RA-TUs, ie RU4 and RU5, for the stations that are not associated with the AP.

The fourth site is associated with the AP, and the fourth site that needs to perform uplink data transmission with the AP is allocated a dedicated RU (RU6). Therefore, the fourth station does not compete for available RA-RUs, but transmits uplink data on RU6.

The first site is associated with the AP, and the first site needs to perform uplink data transmission with the AP. Therefore, the first station decrements its initial OBO counter value (ie 3) according to the number of available RA-RUs indicated (or allocated) in trigger frame 1 (ie RA-RUs of the three associated stations). Since the value of the OBO counter of the first site is decremented to 0 (ie, 3 minus 3), the first site will transmit uplink data on RU2. Among them, RU2 is randomly selected from the available RA-RUs (ie RU1, RU2 and RU3).

The second site is associated with the AP, and the second site needs to perform uplink data transmission with the AP. Therefore, the second station decrements its initial OBO counter value (ie 5) according to the number of available RA-RUs indicated (or allocated) in trigger frame 1 (ie RA-RUs of the three associated stations). Since the value of the OBO counter of the second site is decremented to a non-zero value (ie, 5 minus 3), the second site will maintain the new value of the OBO counter (ie, 2) until a subsequent OBO counter with the associated site is received Trigger frame of RA-RU.

The third site is not associated with the AP, and the third site needs to perform uplink data transmission with the AP. Therefore, the third station decrements its initial OBO counter value (ie 4) according to the number of available RA-RUs indicated (or allocated) in trigger frame 1 (ie RA-RUs of two unassociated stations) . Since the value of the OBO counter of the third site is decremented to a non-zero value (ie, 4 minus 2), the third site will maintain the new value of the OBO counter (ie, 2) until a subsequent Trigger frame of RA-RU.

After transmitting the HE TB PPDU in response to trigger frame 1:

The fourth station needs to continue to perform uplink data transmission with the AP. Therefore, the fourth station maintains its initial OBO counter value (ie, 2) until a subsequent trigger frame carrying the RA-RU of the associated station is received.

The first station needs to continue to perform uplink data transmission with the AP. Therefore, the first site randomly selects a new value of the OBO counter (ie, 4).

After receiving trigger frame 2:

The first site is associated with the AP, and the first site needs to perform uplink data transmission with the AP. Therefore, the first station decrements the value of its new OBO counter (ie 4) according to the number of available RA-RUs indicated (or allocated) in trigger frame 2 (ie RA-RUs of the two associated stations). Since the value of the OBO counter of the first station is decremented to a non-zero value (ie, 4 minus 2), the first station will maintain the new value of the OBO counter (ie, 2) until a subsequent Trigger frame of RA-RU.

The second site is associated with the AP, and the second site needs to perform uplink data transmission with the AP. Therefore, the second station decrements the value of the OBO counter it maintains (ie 2) according to the number of available RA-RUs indicated (or allocated) in trigger frame 2 (ie the RA-RUs of the two associated stations). Since the value of the OBO counter of the second site is decremented to 0 (that is, 2 minus 2), the second site will transmit uplink data on RU2. Among them, RU2 is randomly selected from the available RA-RUs (ie RU1 and RU2).

The third site is not associated with the AP, and the third site needs to perform uplink data transmission with the AP. Therefore, the third station decrements the value of the OBO counter it maintains (ie, 2) according to the number of available RA-RUs indicated (or allocated) in trigger frame 2 (ie, the RA-RUs of the two unassociated stations) . Since the value of the OBO counter of the third site is decremented to 0 (that is, 2 minus 2), the third site will randomly select an RA-RU from RU3 and RU4 for uplink data transmission.

The fourth site is associated with the AP, and the fourth site needs to perform uplink data transmission with the AP. Therefore, the fourth station decrements the value of its OBO counter (ie 2) according to the number of available RA-RUs indicated (or allocated) in trigger frame 2 (ie RA-RUs of the two associated stations). Since the value of the OBO counter of the fourth site is decremented to 0 (that is, 2 minus 2), the fourth site will transmit uplink data on RU1. Among them, RU1 is randomly selected from the available RA-RUs (ie RU1 and RU2).

With reference to the above description, an embodiment of the present application provides a schematic flowchart of a wireless communication method, please refer to FIG. 3 , the method includes:

S310. The access point sends a first-type trigger frame to the station, where the first-type trigger frame is used to trigger the orthogonal frequency division multiple access-based uplink random access UORA for the first-type station and the second-type station.

Wherein, the access point may be the first type of access point.

It should be noted that, since the access point in this embodiment of the present application is the first type of access point, the access point may send the first type of trigger frame.

Specifically, the first type of access point may be an extremely high throughput access point station (extremely hight throughput AP station, EHT AP STA); or, the first type of access point may be a Wi-Fi7 access point or a Wi-Fi 7 access point. - Fi8 access point; alternatively, the first type of access point may be a non-Wi-Fi6 access point.

It should be noted that the access point in IEEE 802.11ax is usually called a high efficiency AP station (HE AP STA) or a Wi-Fi6 access point, while in the next generation such as IEEE 802.11be Access points in WLAN communication standards may be called EHT AP STAs, Wi-Fi7 access points, Wi-Fi8 access points, or non-Wi-Fi6 access points. Meanwhile, the first type of access point in the embodiment of the present application has a different communication function from that of the HE AP STA or the Wi-Fi6 access point.

Specifically, the first type of trigger frame may be a trigger frame in a next-generation WLAN communication standard such as IEEE 802.11be. The first type of trigger frame may be an extremely high throughput trigger frame (extremely high throughput trigger frame, EHT TF).

It should be noted that the trigger frame in IEEE 802.11ax is usually called high efficiency (HE) trigger frame (HE TF), while the trigger frame in next-generation WLAN communication standards such as IEEE 802.11be may be called EHT TF. Among them, the fields carried by the EHT TF (such as the user information field, the public information field, etc. described above) may be different from the fields carried by the HE TF. Therefore, the way HE TF is used to trigger UORA may differ from the way EHT TF is used to trigger UORA. Based on this, the embodiments of the present application require further research on EHT TF.

Specifically, the trigger frame of the first type may include information of a random access resource unit RA-RU set, the RU set corresponds to a dedicated association identifier AID, and the dedicated AID may be used to indicate that the RA-RU corresponding to the dedicated AID is used for receiving The first type of station and the second type of station that are associated or unassociated with the entry point perform random access.

The RA-RU in the RA-RU set (RA-RU sets) may be an available random access resource unit RA-RU (eligible random access resource unit, eligible RA-RU). It should be noted that the RA-RU may be the RU indicated (or allocated) in the trigger frame in order to support the UORA procedure.

The first type of site may be a non-access point extremely high throughput site (non-AP EHT STA); the second type of site may be a non-access point high-efficiency site (non-AP HE STA).

The RA-RU set may include at least one of the following: 26-tone RU (26-tone RU), 52-tone RU (52-tone RU), 106-tone RU (106-tone RU), 242-tone RU (242-tone RU) tone RU), 484-tone RU (484-tone RU), 996-tone RU (996-tone RU), 2*996-tone RU (2*996-tone RU). It can be understood that the station may use at least one of 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU, 996-tone RU, and 2*996-tone RU to perform uplink data transmission.

It should be noted that, since backward compatibility is required between various WLAN communication standards, in the case that the next-generation WLAN communication standards such as IEEE 802.11be are compatible with IEEE 802.11ax, the access point of the embodiment of the present application may be compatible with the support The first type of station (such as non-AP EHT STA) of the next-generation WLAN communication standard such as IEEE802.11be performs uplink data transmission, and may also simultaneously transmit with the second type of station (such as non-AP HE STA) supporting IEEE 802.11ax Transmission of upstream data. Based on this, the access point can simultaneously allocate RUs for access at any time to the first type station and the second type station through the first type trigger frame, so as to realize the first type station and the second type station through the first type trigger frame Resource configuration or scheduling for a site. In addition, since the RU used for the uplink random access of the first type of station and the RU used for the second type of station uplink random access do not need to be isolated in the frequency domain, it is beneficial to improve the resource utilization efficiency.

It should be further noted that the RA-RU set allocated by the first type trigger frame may correspond to a dedicated association identifier (association identifier, AID), and the dedicated AID may be represented by the AID12 subfield of the user information field in the first type trigger frame. . Wherein, if the AID12 subfield is set to 0 to indicate at least one available RA-RU, the RA-RU is used for random access to the first type station and the second type station associated with the access point; if the AID12 subfield Set to 2045 to indicate at least one available RA-RU, and the RA-RU is used for random access to the first type station and the second type station that are not associated with the access point.

S320. The station acquires the trigger frame of the first type from the access point.

Wherein, the site may be the first type site.

Specifically, the first type of site may be compatible with the second type of site.

It should be noted that, since backward compatibility is required between various WLAN communication standards, the first type of station of the next-generation WLAN communication standard such as IEEE802.11be can be compatible with the second type of station of IEEE 802.11ax.

Specifically, the first type of station may be a non-AP STA of a next-generation WLAN communication standard such as IEEE802.11be. The first type of station may be a non-access point extremely high throughput station (non-AP EHT STA).

S330. The station sends the second type of physical layer protocol data unit to the access point through the UORA.

S340. The access point acquires the second type of physical layer protocol data unit from the station.

Specifically, the second type of physical layer protocol data unit may be a high-efficiency trigger-based physical layer protocol data unit (HE trigger-based PHY protocol data unit, HE TB PPDU).

It should be noted that the first type of station usually uses the first type of PPDU to respond to the first type of trigger frame, while the second type of station usually uses the second type of PPDU to respond to the first type of trigger frame. The first type of PPDU may be a PPDU in a next-generation WLAN communication standard such as IEEE 802.11be, such as a physical layer protocol data unit (EHT trigger-based PHY protocol data unit, EHT TB PPDU) triggered based on extremely high throughput. In addition, since the first type of station can be compatible with the second type of station, the first type of station can also use the second type of PPDU to respond to the first type of trigger frame.

It should be further noted that, due to the need for backward compatibility between various WLAN communication standards, the first type of station of the next-generation WLAN communication standard such as IEEE802.11be and the second type of station of IEEE 802.11ax perform uplink data at the same time. On the transmission channel, there may be a problem of data collision.

For example, when the RUs selected by the non-AP HE STA and the non-AP EHT STA are under the same 20Mhz, the traditional short training field (legacy short training field, L-STF) in the HE TB PPDU sent by the non-AP HE STA )/legacy long training field (L-LTF)/legacy signal field (L-SIG)/repeat legacy signal field (RL-SIG)/efficient signaling Field A (HE signal-A field, HE-SIG-A) and the L-STF/L-LTF/L-SIG/RL-SIG/U-SIG in the EHT TB PPDU sent by the non-AP EHT STA are in the same 20Mhz, resulting in data collision and failure of the access point to receive data.

Based on this, in order to solve the problem of data collision, in this embodiment of the present application, the access point sends the first type of trigger frame to the station, and the first type of trigger frame is used to trigger the UORA of the first type of station and the second type of station; Acquire the trigger frame of the first type from the access point, and send the PPDU of the second type through the UORA. Since the station is a first-type station, and both the first-type station and the second-type station need to use their own type of PPDU to respond to the first-type trigger frame, the second-type station usually uses the second-type PPDU to respond to the first-type trigger frame. The first type of trigger frame responds. Therefore, in order to avoid collision between the PPDU sent by the first type of station and the PPDU sent by the second type of station, the first type of station in this embodiment of the present application chooses to send the second type of PPDU. Although the first-type station and the second-type station transmit the same second-type PPDU, the access point can successfully receive it, which is beneficial to avoid the occurrence of data collision. In addition, since the first-type station and the second-type station send the same second-type PPDU, there is no need for the resources that carry the second-type PPDU sent by the first-type station and the second-type PPDU that bears the second-type station to send. The resources of the PPDU are isolated, which is beneficial to improve resource utilization.

In combination with the access point in the above, the RA-RU set for random access is allocated to the first type station and the second type station through the first type trigger frame. The physical layer protocol data unit is described in detail.

Specifically, sending the second type of physical layer protocol data unit through the UORA may include: the station determines the target RU on the RA-RU set through the UORA, and the target RU may include at least one RA-RU in the RA-RU set; The second type of physical layer protocol data unit is sent on the target RU.

The RA-RU set may include a target RU, and the target RU may be used to carry the second type of physical layer protocol data unit.

Wherein, the target RU may include at least one RA-RU in the RA-RU set.

It should be noted that the station (ie, the first type of station) in this embodiment of the present application may support at least one RA-RU to transmit uplink data (eg, PPDU), thereby helping to improve the flexibility of RU allocation and scheduling. Therefore, the station (ie the first type station) can select at least one RA-RU (ie the target RU) in the RA-RU set through the UORA to send the PPDU of the second type to the access point, so as to transmit the second type of PPDU through the target RU PPDU to implement the response to the first type of trigger frame.

Further, the first field of the PPDU of the second type is sent on the 20MHz channel corresponding to the target RU, and the first field includes at least one of the following: traditional short training field L-STF, traditional long training field L-LTF, traditional signaling Field L-SIG, Repeat Legacy Signaling Field RL-SIG, High Efficiency Signaling Field HE-SIG-A.

Wherein, if the first field occupies more than one 20MHz channel, the first field is repeated on multiple 20MHz channels.

It should be noted that the second type of PPDU can be HE TB PPDU, and HE TB PPDU usually includes at least one of L-STF, L-LTF, L-SIG, RL-SIG, A HE-SIG-A (that is, first field). At the same time, the IEEE 802.11 series of protocols usually expand the data transmission channel into multiple 20Mhz according to 20Mhz. Therefore, in order to ensure that the access point can receive the first field of the second type of PPDU, the embodiment of this application considers the second type of PPDU. The first field of the PPDU is sent on the 20MHz channel corresponding to the target RU, thereby ensuring that the access point can successfully receive the PPDU of the second type, and improving the stability and robustness of the WLAN communication. In addition, if the first field occupies more than one 20MHz channel, the second field of the second type of PPDU is repeatedly sent on multiple 20MHz channels corresponding to the target RU, thereby further ensuring that the access point can successfully receive the second type of PPDU. PPDU, and improve the stability and robustness of WLAN communication.

Further, the target RU may be located on the primary channel or the secondary channel; or, the target RU may be located on the primary channel with a frequency of 160 MHz (ie, the primary 160 MHz channel).

It should be noted that, in WLAN communication, channels can generally be divided into a primary channel (primary channel) and a secondary channel (secondary channel), wherein the secondary channel may include one or more sub-channels. Therefore, the target RU in this embodiment of the present application may be located on the primary channel or the secondary channel. That is to say, the station may send the PPDU of the second type through the RA-RU located on the primary channel or the secondary channel allocated by the first type of trigger frame.

Additionally, since non-AP HE STAs typically do not transmit HE TB PPDUs on secondary 160MHz channels, and non-AP EHT STAs typically do not transmit HE TB PPDUs on secondary 160MHz channels, only allocations on primary 160MHz channels (or When indicating RA-RU, the non-AP EHT STA can send HE TB PPDU only when UORA is performed. That is, the station may send the second type of PPDU through the RA-RU located on the primary 160MHz channel that triggers the frame allocation of the first type.

Further, the target RU may specifically include at least one idle RA-RU in the RA-RU set after the station performs carrier sense.

The carrier sense (carrier sense, CS) may include physical carrier sense or virtual carrier sense. Physical carrier sensing can include clear channel assessment (CCA) or energy detect (ED).

It should be noted that yes, carrier sense means that a station needs to detect whether other stations are sending data on the channel before sending data to avoid data collision. Therefore, the station first selects the target RU from the RA-RU set through UORA, and then determines whether the target RU is idle through carrier sensing, thereby helping to avoid data collisions and improving the success rate of data transmission.

Further, the number of RA-RUs in the target RU may be determined by the communication capability of the site.

The communication capability of the station is related to at least one of the following: the transmission bandwidth supported by the station, the number of space-time streams (NSTS) supported by the station, the modulation and coding scheme (modulation) supported by the station and coding scheme, MCS), dual carrier modulation (DCM) supported by the site, length of the guard interval (GI) supported by the site, long training field (LTF) supported by the site ) type, the space time block code (STBC) supported by the station, the transmission power supported by the station, and the length of the padding field supported by the station. The length of the padding field may indicate the length of the padding field included in the PPDU.

It should be noted that the station in this embodiment of the present application can select the target RU and the number of RA-RUs in the target RU from the set of RA-RUs allocated by the first type of trigger frame through the UORA and the communication capability of the station, which is beneficial to Improve the success rate of site uplink data transmission, thereby improving the stability and robustness of the WLAN network.

With reference to the above description, the following embodiments of the present application describe how the station determines the target RU on the RA-RU set through the UORA.

Specifically, before the station acquires the trigger frame of the first type, the method further includes: acquiring the value of the OBO counter; and determining the target RU on the RA-RU set through the UORA, which may include: the station assigning the value of the OBO counter according to the RA-RU set The number of RA-RUs in the RA-RU is decremented; if the value of the OBO counter is decremented to 0, the station randomly selects at least one RA-RU from the RA-RU set to determine the target RU.

It should be noted that, first, before a station (that is, a first-type station) receives a first-type trigger frame from an access point (that is, a first-type access point), the access point can respond to a beacon frame, a probe Frames etc. send UORA parameter set elements to the station to set OCWmin and OCWmax.

Second, the site can randomly choose an integer value in the uniform distribution of the OCW's range of values. The OCW value ranges from 0 to the OCW value, and the OCW value may be greater than or equal to OCWmin and less than or equal to OCWmax. The site sets the selected integer value as the value of the OBO counter, thereby realizing the acquisition of the value of the OBO counter.

Finally, the station receives the trigger frame of the first type from the access point and decrements the number of RA-RUs in the set of RA-RUs for random access indicated (or allocated) in the trigger frame of the first type The value of the OBO counter. When the value of the OBO counter is decremented to 0, the station may randomly select at least one RA-RU (that is, the target RU) from the set of RA-RUs, and try to perform uplink data (that is, the second type of RU) through the target RU. PPDU), thereby realizing the response to the trigger frame of the first type through the PPDU of the second type. In addition, the station may also determine whether the target RU is idle through physical carrier sensing or virtual carrier sensing. If the target RU is idle, the station can transmit uplink data through the target RU; if the target RU is busy, the station will not transmit uplink data on the target RU, and the station should re-transmit the OBO The value of the counter is set to an integer value randomly selected from a uniform distribution within the OCW value.

Further, after sending the second type of physical layer protocol data unit on the target RU, the method may further include: the station updates the value of the OBO counter.

It should be noted that, if the station (ie the first type of station) successfully sends the second type of PPDU in the target RU, that is, the access point (ie the first type of access point) successfully accesses the second type of PPDU or The station receives an acknowledgement frame (ACK) for the PPDU of the second type, the station may set the OCW value to the latest OCWmin indicated from the UORA parameter set element for the access point or the default value (if the station has not Receive the UORA parameter set element), and update the value of its OBO counter, that is, an integer value randomly selected from the uniform distribution within the OCW value of the site as the value of the OBO counter, so as to ensure the site's subsequent Uplink data transmission is performed through UORA, thereby improving the stability and robustness of WLAN communication.

With reference to the above description, the method shown in FIG. 3 may further include: the station sends the first type of physical layer protocol data unit through the UORA.

The first type of PPDU may be a PPDU in a next-generation WLAN communication standard such as IEEE 802.11be, for example, an EHT TB PPDU.

It should be noted that, while the station in this embodiment of the present application (that is, the first type of station) uses the second type of PPDU to respond to the first type of trigger frame, it can also use the first type of PPDU to respond to the first type of trigger frame. Respond, thereby ensuring that the station (ie, the first type station) supports the transmission of multiple types of PPDUs, thereby improving the communication processing capability of the station.

The solutions of the embodiments of the present application have been introduced above mainly from the perspective of the method side. It can be understood that, in order to implement the above-mentioned functions, the station or access point includes corresponding hardware structures and/or software modules for performing each function. Those skilled in the art should easily realize that the present application can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software-driven hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, functional units may be divided into sites or access points according to the foregoing method examples. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The above-mentioned integrated units can be implemented in the form of hardware, and can also be implemented in the form of software program modules. It should be noted that, the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division manners in actual implementation.

In the case of using integrated units, FIG. 4 provides a block diagram of functional units of a wireless communication device. The wireless communication apparatus 400 includes: a processing unit 402 and a communication unit 403 . The processing unit 402 is used to control and manage the actions of the site. For example, the processing unit 402 is used to support the site to perform the steps in FIG. 3 and other processes for the technical solutions described in this application. The communication unit 403 is used to support communication between the station and other devices in the wireless communication system. The wireless communication apparatus 400 may further include a storage unit 401 for program codes executed by the wireless communication apparatus 400 and data transmitted.

It should be noted that the wireless communication device 400 may be a chip or a chip module.

The processing unit 402 may be a processor or a controller, such as a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), or an application-specific integrated circuit (application-specific integrated circuit). integrated circuit, ASIC), field programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processing unit 402 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication unit 403 may be a communication interface, a transceiver, a transceiver circuit, etc., and the storage unit 401 may be a memory. When the processing unit 402 is a processor, the communication unit 403 is a communication interface, and the storage unit 401 is a memory, the wireless communication apparatus 400 involved in this embodiment of the present application may be the site shown in FIG. 6 .

During specific implementation, the processing unit 402 is configured to perform any step performed by the station in the above method embodiments, and when performing data transmission such as sending, the communication unit 403 can be selectively invoked to complete corresponding operations. A detailed description will be given below.

The processing unit 402 is configured to: acquire a trigger frame of the first type, and the trigger frame of the first type is used to trigger the OFDM-based uplink random access UORA of the first type of station and the second type of station; Two types of physical layer protocol data unit PPDU.

It should be noted that, the specific implementation of each operation in the embodiment shown in FIG. 4 may refer to the description in the method embodiment shown in FIG. 3 above, which will not be repeated here.

In a possible example, the trigger frame of the first type includes information about a random access resource unit RA-RU set, the RA-RU set corresponds to a dedicated association identifier AID, and the dedicated AID is used to indicate that the RA-RU corresponding to the dedicated AID is used for Stations of the first type and stations of the second type that are associated or unassociated with the access point perform random access.

In a possible example, in terms of sending the second type of physical layer protocol data unit through the UORA, the processing unit 402 is specifically configured to: determine the target RU on the RA-RU set through the UORA, and the target RU includes the RA-RU set in the RA-RU set. At least one RA-RU; sends a second type of physical layer protocol data unit on the target RU.

In a possible example, the first field of the physical layer protocol data unit of the second type is sent on a 20MHz channel corresponding to the target RU; the first field includes at least one of the following: a traditional short training field L-STF, a traditional long training field Field L-LTF, Legacy Signaling Field L-SIG, Repeat Legacy Signaling Field RL-SIG, Efficient Signaling Field HE-SIG-A.

In a possible example, if the first field occupies more than one 20MHz channel, the first field is repeatedly sent on multiple 20MHz channels.

In a possible example, the target RU is located on the primary channel or the secondary channel; or, the target RU is located on the primary channel with a frequency of 160 MHz.

In a possible example, the target RU specifically includes at least one idle RA-RU in the RA-RU set after the station performs carrier sensing.

In a possible example, the number of RUs in the target RU is determined by the communication capability of the site.

In a possible example, the communication capability of the station is related to at least one of the following: the transmission bandwidth supported by the station, the number of space-time streams supported by the station, the modulation and coding scheme supported by the station, and the dual-carrier modulation supported by the station , the length of the guard interval supported by the station, the long training field type supported by the station, the space-time block coding supported by the station, the transmission power supported by the station, and the length of the padding field supported by the station.

In a possible example, before acquiring the trigger frame of the first type, the processing unit 402 is further configured to: acquire the value of the OBO counter;

In terms of determining the target RU on the RA-RU set through the UORA, the processing unit 402 is specifically configured to: decrement the value of the OBO counter according to the number of RA-RUs in the RA-RU set; if the value of the OBO counter is decremented to 0 , then at least one RA-RU is randomly selected from the RA-RU set to determine the target RU.

In a possible example, after the physical layer protocol data unit of the second type is sent on the target RU, the processing unit 402 is further configured to: update the value of the OBO counter.

In a possible example, the physical layer protocol data unit of the second type is a high-efficiency trigger-based physical layer protocol data unit HE TB PPDU.

In one possible example, the first type of trigger frame is an extremely high throughput EHT trigger frame.

In a possible example, the first type of station is a non-access point extremely high throughput station non-AP EHT STA, and the second type of station is a non-access high-efficiency station non-AP HE STA.

In a possible example, the processing unit 402 is further configured to: send the first type of physical layer protocol data unit through the UORA.

In the case of using integrated units, FIG. 5 provides a block diagram of functional units of another wireless communication device. The wireless communication apparatus 500 includes: a processing unit 502 and a communication unit 503 . The processing unit 502 is configured to control and manage the actions of the access point. For example, the processing unit 502 is used to support the access point to perform the steps in FIG. 3 and other processes for the technical solutions described in this application. The communication unit 503 is used to support communication between the access point and other devices in the wireless communication system. The wireless communication apparatus 500 may further include a storage unit 501 for storing program codes executed by the wireless communication apparatus 500 and data transmitted.

It should be noted that the wireless communication device 500 may be a chip or a chip module.

The processing unit 502 may be a processor or a controller, such as a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), or an application-specific integrated circuit (application-specific integrated circuit). integrated circuit, ASIC), field programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processing unit 502 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication unit 503 may be a communication interface, a transceiver, a transceiver circuit, etc., and the storage unit 501 may be a memory. When the processing unit 502 is a processor, the communication unit 503 is a communication interface, and the storage unit 501 is a memory, the wireless communication apparatus 500 involved in this embodiment of the present application may be the access point shown in FIG. 7 .

During specific implementation, the processing unit 502 is configured to perform any step performed by the access point in the above method embodiments, and when performing data transmission such as sending, the communication unit 503 can be selectively invoked to complete corresponding operations. A detailed description will be given below.

The processing unit 502 is configured to: send a trigger frame of the first type, and the trigger frame of the first type is used to trigger the uplink random access UORA based on the orthogonal frequency division multiple access of the first type station and the second type station; obtain the second type The physical layer protocol data unit PPDU.

It should be noted that, the specific implementation of each operation in the embodiment shown in FIG. 5 may refer to the description in the method embodiment shown in FIG. 3 above, and details are not repeated here.

In a possible example, the trigger frame of the first type includes information about a random access resource unit RA-RU set, the RA-RU set corresponds to a dedicated association identifier AID, and the dedicated AID is used to indicate that the RA-RU corresponding to the dedicated AID is used for The access point is associated or the first type of station and the second type of station perform random access.

In a possible example, the RA-RU set includes a target RU, the target RU is used to carry the second type of physical layer protocol data unit, and the target RU includes at least one RA-RU in the RA-RU set.

In a possible example, the first field of the physical layer protocol data unit of the second type is received on a 20MHz channel corresponding to the target RU; the first field includes at least one of the following: a traditional short training field L-STF, a traditional long training field Field L-LTF, Legacy Signaling Field L-SIG, Repeat Legacy Signaling Field RL-SIG, Efficient Signaling Field HE-SIG-A.

In a possible example, if the first field occupies more than one 20MHz channel, the first field is repeated on multiple 20MHz channels.

In a possible example, the target RU is specifically at least one idle RA-RU in the RA-RU set after the station performs carrier sensing.

In a possible example, the first type of access point is an extremely high throughput access point station EHT AP STA; or, the first type of access point is a Wi-Fi7 access point or a Wi-Fi8 access point ; Or, the first type of access point is a non-Wi-Fi6 access point.

In a possible example, the processing unit 502 is further configured to: acquire the first type of physical layer protocol data unit.

Please refer to FIG. 6. FIG. 6 is a schematic structural diagram of a site provided by an embodiment of the present application. The site 600 includes a processor 610 , a memory 620 , a communication interface 630 , and a communication bus for connecting the processor 610 , the memory 620 , and the communication interface 630 .

The memory 620 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or A portable read-only memory (compact disc read-only memory, CD-ROM), the memory 620 is used to store program codes executed by the station 600 and data transmitted.

Communication interface 630 is used to receive and transmit data.

The processor 610 may be one or more CPUs, and if the processor 610 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 610 in the station 600 is configured to read one or more programs 621 stored in the memory 620, and perform the following operations: obtain a first type trigger frame, and the first type trigger frame is used to trigger the first type station and the second type The station's uplink random access UORA based on orthogonal frequency division multiple access; the second type of physical layer protocol data unit PPDU is sent through the UORA.

It should be noted that the specific implementation of each operation may adopt the corresponding description of the method embodiment shown in FIG. 3 above, and the site 600 may be used to execute the site-side method of the foregoing method embodiment of the present application, which will not be described in detail here.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of an access point provided by an embodiment of the present application. The access point 700 includes a processor 710 , a memory 720 , a communication interface 730 , and a communication bus for connecting the processor 710 , the memory 720 , and the communication interface 730 .

The memory 720 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or A portable read-only memory (compact disc read-only memory, CD-ROM), the memory 720 is used for storing program codes executed by the access point 700 and data transmitted.

Communication interface 730 is used to receive and transmit data.

The processor 710 may be one or more CPUs, and if the processor 710 is one CPU, the CPU may be a single-core CPU or a multi-core CPU.

The processor 710 in the access point 700 is configured to read one or more programs 721 stored in the memory 720, and perform the following operations: send a first type of trigger frame, and the first type of trigger frame is used to trigger the first type of station and the first type of trigger frame. The uplink random access UORA based on orthogonal frequency division multiple access of the second type of station; the access point obtains the second type of physical layer protocol data unit PPDU.

It should be noted that the specific implementation of each operation may adopt the corresponding description of the method embodiment shown in FIG. 3 above, and the access point 700 may be used to execute the method on the access point side of the above method embodiment of the present application. More specific details.

Embodiments of the present application further provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the site as described in the foregoing method embodiments or some or all of the steps described by the access point.

The embodiments of the present application further provide a computer program product, wherein the computer program product includes a computer program, and the computer program is operable to cause the computer to execute the part or the part described by the station or the access point in the foregoing method embodiments. all steps. The computer program product may be a software installation package.

In the above-mentioned embodiments, the description of each embodiment in this embodiment of the present application has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

The steps of the method or algorithm described in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions. Software instructions can be composed of corresponding software modules, and software modules can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (erasable programmable read-only memory, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium may reside in an ASIC. Alternatively, the ASIC can be located in a site or an access point. Of course, the processor and storage medium may also exist as discrete components in the site or access point.

Those skilled in the art should realize that, in one or more of the above examples, the functions described in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted via wireline (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) means from a website site, computer, server, or data center. To another website site, computer, server or data center. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, digital video disc (DVD)), or semiconductor media (eg, solid state disk (SSD)) Wait.

The modules/units included in the devices and products described in the above embodiments may be software modules/units, hardware modules/units, or may be partly software modules/units and partly hardware modules/units. For example, for each device or product applied to or integrated in a chip, each module/unit included therein may be implemented by hardware such as circuits, or at least some of the modules/units may be implemented by a software program. Running on the processor integrated inside the chip, the remaining (if any) part of the modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the chip module, the modules/units contained therein can be They are all implemented by hardware such as circuits, and different modules/units can be located in the same component of the chip module (such as chips, circuit modules, etc.) or in different components, or at least some of the modules/units can be implemented by software programs. The software program runs on the processor integrated inside the chip module, and the remaining (if any) part of the modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the site or access point, its The included modules/units may be implemented in hardware such as circuits, and different modules/units may be located in the same component (for example, a chip, circuit module, etc.) or in different components within the site or access point, or at least some of the modules /The unit can be implemented by a software program, the software program runs on the processor integrated inside the station or the access point, and the remaining (if any) part of the modules/units can be implemented by hardware such as circuits.

The specific embodiments described above further describe in detail the purposes, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above descriptions are only specific implementations of the embodiments of the present application, and are not intended to be used for The protection scope of the embodiments of the present application is limited, and any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included within the protection scope of the embodiments of the present application.

Claims

A wireless communication method, comprising:

The station obtains a trigger frame of the first type, and the trigger frame of the first type is used to trigger the uplink random access UORA based on orthogonal frequency division multiple access for the station of the first type and the station of the second type, and the station is of the first type site;

The station sends a second type of physical layer protocol data unit PPDU through the UORA.
The method according to claim 1, wherein the trigger frame of the first type includes information of a random access resource unit RA-RU set, the RA-RU set corresponds to a dedicated association identifier AID, and the dedicated AID is used for The RA-RU corresponding to the dedicated AID is instructed to be used for random access by the first type station and the second type station associated with or not associated with the access point.
The method of claim 2, wherein the sending of the second type of physical layer protocol data units through the UORA comprises:

the station determines a target RU on the RA-RU set through the UORA, where the target RU includes at least one RA-RU in the RA-RU set;

The station sends the second type of physical layer protocol data units on the target RU.
The method according to claim 3, wherein the first field of the physical layer protocol data unit of the second type is sent on a 20MHz channel corresponding to the target RU;

The first field includes at least one of the following: a legacy short training field L-STF, a legacy long training field L-LTF, a legacy signaling field L-SIG, a repeated legacy signaling field RL-SIG, and an efficient signaling field HE- SIG-A.
The method of claim 4, wherein if the first field occupies more than one 20MHz channel, the first field is repeatedly sent on multiple 20MHz channels.
The method according to any one of claims 3-5, wherein the target RU is located on a primary channel or a secondary channel; or,

The target RU is located on the primary channel with a frequency of 160MHz.
The method according to any one of claims 3-6, wherein the target RU specifically includes at least one idle RA-RU in the RA-RU set after the station performs carrier sense.
The method according to any one of claims 3-7, wherein the number of RUs in the target RU is determined by the communication capability of the site.
The method of claim 8, wherein the communication capability of the site is related to at least one of the following:

The transmission bandwidth supported by the site, the number of space-time streams supported by the site, the modulation and coding schemes supported by the site, the dual-carrier modulation supported by the site, and the number of guard intervals supported by the site length, the type of long training field supported by the station, the space-time block coding supported by the station, the transmission power supported by the station, and the length of the padding field supported by the station.
The method according to any one of claims 3-9, wherein, before acquiring the trigger frame of the first type, further comprising:

Get the value of the OBO counter;

The determining a target RU on the RA-RU set by using the UORA includes:

The station decrements the value of the OBO counter according to the number of RA-RUs in the RA-RU set;

If the value of the OBO counter is decremented to 0, the station randomly selects at least one RA-RU from the RA-RU set to determine the target RU.
The method of claim 10, wherein after transmitting the second type of physical layer protocol data unit on the target RU, the method further comprises:

The station updates the value of the OBO counter.
The method according to any one of claims 1-11, wherein the physical layer protocol data unit of the second type is a high-efficiency trigger-based physical layer protocol data unit HE TB PPDU.
The method according to any one of claims 1-12, wherein the first type of trigger frame is an extremely high throughput EHT trigger frame.
The method according to any one of claims 1-13, wherein the first type of station is a non-access point extremely high throughput station (non-AP EHT STA), and the second type of station is a non-access high-efficiency station Site non-AP HE STA.
The method according to any one of claims 1-14, wherein, further comprising:

The station sends the first type of physical layer protocol data units through the UORA.
A wireless communication method, comprising:

The access point sends a trigger frame of the first type, where the trigger frame of the first type is used to trigger the uplink random access UORA based on orthogonal frequency division multiple access for the first type of station and the second type of station, and the access point is the first type of trigger frame. A type of access point;

The access point acquires a physical layer protocol data unit PPDU of the second type.
The method according to claim 16, wherein the trigger frame of the first type includes information of a random access resource unit RA-RU set, the RA-RU set corresponds to a dedicated association identifier AID, and the dedicated AID is used for The RA-RU corresponding to the dedicated AID is instructed to be used for access point association or random access between the first type of station and the second type of station.
18. The method of claim 17, wherein the set of RA-RUs comprises a target RU for carrying the second type of physical layer protocol data units, the target RU comprising the RA-RU At least one RA-RU in the set.
The method of claim 18, wherein the first field of the physical layer protocol data unit of the second type is received on a 20MHz channel corresponding to the target RU;

The first field includes at least one of the following: a legacy short training field L-STF, a legacy long training field L-LTF, a legacy signaling field L-SIG, a repeated legacy signaling field RL-SIG, and an efficient signaling field HE- SIG-A.
19. The method of claim 19, wherein if the first field occupies more than one 20MHz channel, the first field is repeated on multiple 20MHz channels.
The method according to any one of claims 18-20, wherein the target RU is located on a primary channel or a secondary channel; or,

The target RU is located on the primary channel with a frequency of 160MHz.
The method according to any one of claims 18-21, wherein the target RU is specifically at least one idle RA-RU in the RA-RU set after the station performs carrier sense.
The method according to any one of claims 16-22, wherein the physical layer protocol data unit of the second type is a high-efficiency trigger-based physical layer protocol data unit HE TB PPDU.
The method according to any one of claims 16-23, wherein the first type of trigger frame is an extremely high throughput EHT trigger frame.
The method according to any one of claims 16-24, wherein the first type of access point is an extremely high throughput access point station EHT AP STA; or,

The first type of access point is a Wi-Fi7 access point or a Wi-Fi8 access point; or,

The first type of access point is a non-Wi-Fi6 access point.
The method according to any one of claims 16-25, wherein, further comprising:

The access point obtains physical layer protocol data units of the first type.
A wireless communication device, wherein the device includes a processing unit and a communication unit, and the processing unit is configured to:

Acquire a trigger frame of the first type by the communication unit, where the trigger frame of the first type is used to trigger the uplink random access UORA based on orthogonal frequency division multiple access for the first type of station and the second type of station;

A second type of physical layer protocol data unit PPDU is sent through the communication unit and the UORA.
The apparatus according to claim 27, wherein the trigger frame of the first type includes information of a random access resource unit RA-RU set, the RA-RU set corresponds to a dedicated association identifier AID, and the dedicated AID is used for The RA-RU corresponding to the dedicated AID is instructed to be used for random access by the first type station and the second type station associated with or not associated with the access point.
29. The apparatus of claim 28, wherein, in the sending of physical layer protocol data units of the second type over the UORA, the processing unit is configured to:

determining, by the UORA, a target RU on the RA-RU set, the target RU including at least one RA-RU in the RA-RU set;

The second type of physical layer protocol data unit is sent on the target RU.
The apparatus of claim 29, wherein the first field of the physical layer protocol data unit of the second type is sent on a 20MHz channel corresponding to the target RU;

The first field includes at least one of the following: a legacy short training field L-STF, a legacy long training field L-LTF, a legacy signaling field L-SIG, a repeated legacy signaling field RL-SIG, and an efficient signaling field HE- SIG-A.
The apparatus of claim 30, wherein if the first field occupies more than one 20MHz channel, the first field is repeatedly sent on multiple 20MHz channels.
The apparatus according to any one of claims 29-31, wherein the target RU is located on a primary channel or a secondary channel; or,

The target RU is located on the primary channel with a frequency of 160MHz.
The apparatus according to any one of claims 29-31, wherein the target RU specifically includes at least one idle RA-RU in the RA-RU set after the apparatus performs carrier sense.
The apparatus of any of claims 29-33, wherein the number of RUs in the target RU is determined by the communication capability of the apparatus.
The apparatus of claim 34, wherein the communication capability of the apparatus is related to at least one of:

The transmission bandwidth supported by the device, the number of space-time streams supported by the device, the modulation and coding schemes supported by the device, the dual-carrier modulation supported by the device, the number of guard intervals supported by the device length, long training field type supported by the device, space-time block coding supported by the device, transmit power supported by the device, length of the padding field supported by the device.
The apparatus according to any one of claims 29-35, wherein, before acquiring the trigger frame of the first type, the processing unit is further configured to:

Get the value of the OBO counter;

In the aspect of determining a target RU on the set of RA-RUs by the UORA, the processing unit is configured to:

Decrement the value of the OBO counter according to the number of RA-RUs in the RA-RU set;

If the value of the OBO counter is decremented to 0, at least one RA-RU is randomly selected from the RA-RU set to determine the target RU.
36. The apparatus of claim 36, wherein, after sending the second type of physical layer protocol data unit on the target RU, the processing unit is further configured to:

Update the value of the OBO counter.
The apparatus according to any one of claims 27-37, wherein the physical layer protocol data unit of the second type is a high-efficiency trigger-based physical layer protocol data unit HE TB PPDU.
The apparatus according to any one of claims 27-38, wherein the first type of trigger frame is an extremely high throughput EHT trigger frame.
The apparatus according to any one of claims 27-39, wherein the first type of station is a non-access point extremely high throughput station (non-AP EHT STA), and the second type of station is a non-access high-efficiency station Site non-AP HE STA.
The apparatus according to any one of claims 27-40, wherein the processing unit is further configured to:

Physical layer protocol data units of the first type are sent over the UORA.
A wireless communication device, wherein the device includes a processing unit and a communication unit, and the processing unit is configured to:

Send a trigger frame of the first type by the communication unit, where the trigger frame of the first type is used to trigger the uplink random access UORA based on orthogonal frequency division multiple access for the first type of station and the second type of station;

The second type of physical layer protocol data unit PPDU is acquired through the communication unit.
The apparatus of claim 42, wherein the trigger frame of the first type includes information of a random access resource unit RA-RU set, the RA-RU set corresponds to a dedicated association identifier AID, and the dedicated AID is used for The RA-RU corresponding to the dedicated AID is instructed to be used for access point association or random access between the first type station and the second type station.
44. The apparatus of claim 43, wherein the set of RA-RUs comprises a target RU for carrying the second type of physical layer protocol data units, the target RU comprising the RA-RU At least one RA-RU in the set.
The apparatus of claim 44, wherein the first field of the physical layer protocol data unit of the second type is received on a 20MHz channel corresponding to the target RU;

The first field includes at least one of the following: a legacy short training field L-STF, a legacy long training field L-LTF, a legacy signaling field L-SIG, a repeated legacy signaling field RL-SIG, and an efficient signaling field HE- SIG-A.
46. The apparatus of claim 45, wherein if the first field occupies more than one 20MHz channel, the first field is repeated on multiple 20MHz channels.
The apparatus according to any one of claims 44-46, wherein the target RU is located on a primary channel or a secondary channel; or,

The target RU is located on the primary channel with a frequency of 160MHz.
The apparatus according to any one of claims 44-47, wherein the target RU is specifically at least one idle RA-RU in the RA-RU set after the station performs carrier sense.
The apparatus according to any one of claims 42-48, wherein the physical layer protocol data unit of the second type is a high-efficiency trigger-based physical layer protocol data unit HE TB PPDU.
The apparatus of any one of claims 42-49, wherein the first type of trigger frame is an extremely high throughput EHT trigger frame.
The apparatus according to any one of claims 42-50, wherein the first type of access point is an extremely high throughput access point station EHT AP STA; or,

The first type of access point is a Wi-Fi7 access point or a Wi-Fi8 access point; or,

The first type of access point is a non-Wi-Fi6 access point.
The apparatus of any one of claims 42-51, wherein the processing unit is further configured to:

Obtain a physical layer protocol data unit of the first type.
A site comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing steps in the method of any of claims 1-15.
An access point, wherein the network device is a first network device, the first network device includes a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in in the memory and configured to be executed by the processor, the program comprising instructions for performing steps in the method of any of claims 16-26.
A computer-readable storage medium in which it stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method of any one of claims 1-26.
A chip comprising a processor, wherein the processor performs the method of any one of claims 1-26.