WO2021238773A1 - Communication method and apparatus - Google Patents

Abstract

Provided are a communication method and apparatus. In the method, a station (STA) receives multiple orthogonal frequency division multiple access (OFDMA) contention window (OCW) parameters sent by an access point (AP), the multiple OCW parameters corresponding to multiple access types; the STA receives a trigger frame, the trigger frame comprising an indication of a random access resource unit (RARU); the STA selects, from the multiple OCW parameters, an OCW parameter corresponding to the access type of a frame to be sent, and determines an initial OFDMA backoff (OBO) value on the basis of the selected OCW parameter; on the basis of the initial OBO value, the STA attempts to send, in the RARU, the frame to be sent. Therefore, different access types correspond to different types of OCWs, thereby meeting requirements of diverse STA service types.

Description

Communication method and device

Cross-references to related applications

This application claims the priority of a Chinese patent application with an application number of 202010448616.0 and an application title of "a communication method and device" filed on May 25, 2020, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of communication technology, and in particular to a communication method and device.

Background technique

The Institute of Electrical and Electronics Engineers (IEEE) 802.11ax draft standard introduced a random channel access method based on orthogonal frequency division multiple access (OFDMA). An access point (access point, AP) sends a trigger frame (TF) to trigger a station (STA) to perform random access. In one trigger, the AP can allocate N resource units (RU, resource unit), and the STA can perform random access in one of the RUs.

STA maintains an orthogonal frequency division multiple access backoff counter (OFDMA backoff counter, OBO counter), its initial value is based on the orthogonal frequency division multiple access contention window (OFDMA contention window, OCW) randomly selects a value, when the backoff counter After the value is reduced to 0, the STA initiates random access on the RU. Therefore, the configuration of the OCW affects the selection of the initial value of the backoff counter, which in turn affects the access delay. For example, if the OCW value is small, the probability that the selected initial value is a small value is greater, that is, the time required for the value of the backoff counter to be reduced to 0 is relatively short, and it can be accessed as soon as possible.

The current development trend is that there are more and more types of STA services, and some services have higher requirements for delay, and it is hoped that they can be accessed as soon as possible. Based on the above mechanism, for this part of the business, if the initial value randomly selected based on the OCW is large, it cannot be accessed as soon as possible, which affects the normal operation of the business.

Summary of the invention

The purpose of this application is to provide a communication method and device, which can configure multiple OCWs to meet the development trend of diversified service types.

In a first aspect, a communication method is provided, the method includes: a station STA receives multiple orthogonal frequency division multiple access contention window OCW parameters sent by an access point AP, where the multiple OCW parameters correspond to multiple access types; The STA receives a trigger frame, the trigger frame includes an indication of a random access resource unit RARU; the STA selects the OCW parameter corresponding to the access type of the frame to be sent among the multiple OCW parameters, and based on the selected OCW parameter Determine an initial Orthogonal Frequency Division Multiple Access backoff OBO value; the STA tries to send the frame to be sent in the RARU based on the initial OBO value.

It should be understood that the configuration of the OCW (that is, the configuration of the maximum value and the minimum value of the OCW) affects the selection of the initial value of the backoff counter, thereby affecting the access delay. For example, if the OCW value is larger, the probability that the selected initial orthogonal frequency division multiple access contention window (OFDMA backoff, OBO) value is a small value is smaller, that is, it takes a longer time for the value of the backoff counter to decrease to 0. The possibility of access as soon as possible is low. Considering the diversified trend of STA service types, some service types have higher requirements for delay. Therefore, in the embodiment of the present application, different access types correspond to different OCW parameters to meet the requirements of service diversity.

For example, the multiple access types include at least two of the following:

Voice VO category;

Video VI category;

Best-effort BE category;

Background BK category;

Real-time application of RTA class.

The above-mentioned access types are only examples and are not limiting, and other access types are also possible.

In a possible design, the minimum value of the OCW parameter corresponding to the voice VO category is smaller than the minimum value of the OCW parameter corresponding to the video category; the minimum value of the OCW parameter corresponding to the video category is smaller than the best effort The minimum value of the OCW parameter corresponding to the class; the minimum value of the OCW parameter corresponding to the best-effort class is smaller than the minimum value of the OCW parameter corresponding to the background class.

An OCW parameter is a numerical range, that is, a combination of a maximum value and a minimum value. For example, it can be in the form of a numerical interval (minimum value, maximum value). One possible implementation is that the STA first selects a value between 0 and the minimum value of OCW (for example, a value of 1) as the initial value of the backoff counter, and when the value of the backoff counter drops to 0, it tries to trigger the frame (for example, The frame to be sent is sent on the RARU indicated by the first trigger frame. If the frame to be sent is not successfully sent, the STA can reset the initial value of the backoff counter, for example, the value 2, which can be a multiple of the value 1, for example, the value 2=2*the value 1, and the value 2 is less than or equal to the maximum value of OCW. When the initial value of the backoff counter drops to 0 again, an attempt is made to send the frame to be sent on the RARU indicated by the next trigger frame (for example, the next trigger frame of the first trigger frame). The following is an example to introduce.

For voice VO, it corresponds to the first OCW parameter. For example, the first OCW parameter is in the range of (5-30). STA can first select a value from 0-5 as the initial value of backoff counter 1; when backoff counter 1 When the value of drops to 0, try to send the frame to be sent on the RARU indicated by the trigger frame.

For the video category VI, corresponding to the second OCW parameter, for example, the first OCW parameter is in the range of (10-30), and the STA can first select a value from 0-10 as the initial value of the back-off counter 2; when the back-off counter 2 When the value of drops to 0, try to send the frame to be sent on the RARU indicated by the trigger frame.

For the BE category, it corresponds to the third OCW parameter. For example, the third OCW parameter is in the range of (15-30). The STA can first select a value from 0-15 as the initial value of the backoff counter 3; when the backoff counter 3 is When the value drops to 0, try to send the frame to be sent on the RARU indicated by the trigger frame.

For the BK category, it corresponds to the fourth OCW parameter. For example, the fourth OCW parameter has a value range of (20-30). The STA can first select a value from 0-20 as the initial value of the backoff counter 4. When the value of the backoff counter 4 drops to 0, an attempt is made to send the frame to be sent on the RARU indicated by the trigger frame.

Therefore, if the minimum value of OCW is set to a small value, the probability that the selected initial OBO value is a small value is greater, then the time required for the backoff counter to decrease to 0 is short, and it can be accessed as soon as possible; on the contrary, the minimum value of OCW is set to be larger If the selected initial OBO value is a small value, the probability is small, so the time required for the backoff counter to decrease to 0 is long, and the access time is extended. For example, if the minimum value of OCW for voice VO, video VI, BE and BK is satisfied: voice VO<video VI<BE<BK, because the first OCW parameter corresponding to the voice VO If the minimum value is smaller, the probability that the voice VO class is accessed as soon as possible is greater, that is, the voice VO class has a higher priority.

For example, the uplink of the multiple OCW parameters in the information element is based on the orthogonal frequency division multiple access random access UORA parameter set field or other fields. Alternatively, the multiple OCW parameters are in a beacon frame, a probe response frame, or an associated response frame.

The foregoing sending methods of multiple OCW parameters are only examples, and other sending methods are also suitable, such as being carried in a re-association response frame or a disassociation response frame, which is not limited in the embodiment of the present application.

In a possible design, the STA attempts to send the frame to be sent in the RARU based on the initial OBO value, including: the number of RARUs is k, and k is an integer greater than or equal to 1; When the difference between the initial OBO value and the k is less than or equal to 0, an attempt is made to send the frame to be sent on one RARU among the k RARUs.

The number of RARUs included in the trigger frame is k. For example, RU1-RU3 are RUs used for random access, that is, k=3, and the initial OBO value selected by the STA is 3, then 3-3=0, then the STA from RU1-RU3 Select an RU to send the frame to be sent. In the embodiment of this application, different service types correspond to different OCW parameters, so the probability that the initial OBO selected by different service types is a small value is different, that is, the time required for the initial OBO to drop to 0 is different, that is, the access delay is different, which satisfies STA's requirements for multiple types of services.

In a second aspect, there is also provided a communication method, including: an access point AP determines multiple orthogonal frequency division multiple access contention window OCW parameters, the multiple OCW parameters correspond to multiple access types; the AP sends the multiple OCW parameters.

The embodiment of this application considers the diversified trend of STA service types. For example, some service types have higher requirements for delay, and some service types have lower requirements for delay. Therefore, in the embodiment of this application, different access types correspond to different OCWs. Parameters to meet the needs of business diversity.

For example, the multiple access types include at least two of the following:

Voice VO category;

Video VI category;

Best-effort BE category;

Background BK category;

Real-time application of RTA class.

The above five types of access are only examples, not limiting, and other types of access are also possible.

In a possible design, the minimum value of the OCW parameter corresponding to the voice VO category is smaller than the minimum value of the OCW parameter corresponding to the video category; the minimum value of the OCW parameter corresponding to the video category is smaller than the best effort The minimum value of the OCW parameter corresponding to the class; the minimum value of the OCW parameter corresponding to the best-effort class is smaller than the minimum value of the OCW parameter corresponding to the background class.

If the minimum value of OCW is set to a small value, the probability that the selected initial OBO value is a small value is greater, and the time required for the backoff counter to decrease to 0 is short, and it can be accessed as soon as possible; on the contrary, if the minimum value of OCW is set to be large, The probability that the selected initial OBO value is a small value is small, so the time required for the backoff counter to decrease to 0 is long, and the access time is extended. For example, if the minimum value of OCW for voice VO, video VI, BE and BK is satisfied: voice VO<video VI<BE<BK, because the first OCW parameter corresponding to the voice VO If the minimum value is smaller, the probability that the voice VO class is accessed as soon as possible is greater, that is, the voice VO class has a higher priority.

There are many ways for the AP to send multiple OCW parameters. For example, the multiple OCW parameters are sent in the uplink orthogonal frequency division multiple access random access UORA parameter set field or other fields in the information element. For another example, the multiple OCW parameters are sent in a beacon frame, a probe response frame, or an association response frame.

The foregoing sending methods of multiple OCW parameters are only examples, and other sending methods are also suitable, such as being carried in a re-association response frame or a disassociation response frame, which is not limited in the embodiment of the present application.

In a third aspect, a communication device is also provided, including:

The transceiver unit is configured to receive multiple orthogonal frequency division multiple access contention window OCW parameters sent by the AP, where the multiple OCW parameters correspond to multiple access types; the transceiver unit is also configured to receive a trigger frame, the trigger frame Including an indication of a random access resource unit RARU; a processing unit, configured to select the OCW parameter corresponding to the access type of the frame to be sent among the multiple OCW parameters, and determine the initial orthogonal frequency division multiple based on the selected OCW parameter Address backoff OBO value; the processing unit is configured to try to send the frame to be sent in the RARU based on the initial OBO value.

In a fourth aspect, a communication device is also provided, including:

A processing unit, configured to determine multiple orthogonal frequency division multiple access contention window OCW parameters, where the multiple OCW parameters correspond to multiple access types;

The transceiver unit is configured to send the multiple OCW parameters.

In a fifth aspect, there is also provided a communication device, including at least one processor coupled with at least one memory; the at least one processor is configured to execute the computer program stored in the at least one memory or Instructions to cause the device to execute the method provided in the above-mentioned first aspect.

In a sixth aspect, there is also provided a communication device, including at least one processor, the at least one processor is coupled with at least one memory; the at least one processor is configured to execute the computer program stored in the at least one memory or Instructions so that the device executes the method provided in the above second aspect.

In a seventh aspect, a communication system is also provided, including: a station STA for implementing the method provided in the first aspect; and an access point AP for implementing the method provided in the second aspect.

In an eighth aspect, a computer-readable storage medium is also provided. The computer-readable storage medium stores a computer program or instruction. When the computer reads and executes the computer program or instruction, the computer executes the first The method provided by the aspect.

In a ninth aspect, a computer-readable storage medium is also provided. The computer-readable storage medium stores a computer program or instruction. When the computer reads and executes the computer program or instruction, the computer executes the second The method provided by the aspect.

In a tenth aspect, a computer program product is also provided, which when the computer program product runs on a computer, causes the computer to execute the method provided in the above-mentioned first aspect.

In an eleventh aspect, a computer program product is also provided, which when the computer program product runs on a computer, causes the computer to execute the method provided in the above-mentioned second aspect.

In a twelfth aspect, a chip is also provided, the chip is coupled with a memory in an electronic device, so that the chip invokes program instructions stored in the memory during operation to implement the method provided in the above-mentioned first aspect.

In a thirteenth aspect, a chip is also provided, which is coupled with a memory in an electronic device, so that the chip invokes program instructions stored in the memory during operation to implement the method provided in the above second aspect.

For the beneficial effects of the third aspect to the thirteenth aspect, please refer to the beneficial effects of the first and second aspects, and will not repeat them.

Description of the drawings

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of this application;

2 is a schematic diagram of triggering uplink transmission through a trigger frame according to an embodiment of the application;

FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 4 is a schematic diagram of a mechanism for using the minimum and maximum values of OCW provided by an embodiment of the application;

Figure 5 is a schematic diagram of the UORA parameter set;

FIG. 6 is a schematic diagram of a UORA parameter set provided by an embodiment of this application;

FIG. 7 is another schematic diagram of the UORA parameter set provided by an embodiment of the application;

FIG. 8 is a schematic diagram of multiple OCW parameters provided by an embodiment of this application;

FIG. 9 is a schematic diagram of a trigger frame provided by an embodiment of the application;

FIG. 10 is a schematic diagram of an attempt to send a voice VO-type frame to be sent on an RU in a trigger frame according to an embodiment of the application;

FIG. 11 is another schematic diagram of trying to send a voice VO-type frame to be sent on an RU in a trigger frame according to an embodiment of the application;

FIG. 12 is a schematic diagram of trying to send a voice VO type first frame to be sent and a video VI type second frame to be sent on an RU in a trigger frame according to an embodiment of the application;

FIG. 13 is a schematic diagram of different STAs trying to send a frame to be sent on an RU in a trigger frame according to an embodiment of this application;

FIG. 14 is a schematic diagram of a device provided by an embodiment of this application;

FIG. 15 is a schematic diagram of another device provided by an embodiment of this application.

Detailed ways

At present, wireless local area network (WLAN) technology has been widely used in home and enterprise networks, and users can implement wireless network services such as entertainment and office through WLAN. However, with the popularization of WLAN, the amount of wireless service data is increasing rapidly. Therefore, more and more wireless services are carried by WLAN. In order to cope with the trend of rapid increase in data carried by WLAN, the IEEE802.11ax standard draft is based on orthogonal frequency division multiplexing. On the basis of (orthogonal frequency division multiplexing, OFDM) technology, orthogonal frequency division multiple access (orthogonal frequency division multiple access, OFDMA) technology is further proposed. The OFDMA technology divides the air interface wireless channel time-frequency resources into multiple orthogonal time-frequency resource units (RU). The AP can allocate different channel resources to different STAs, enabling multiple STAs to efficiently access the channel, and improving channel utilization.

The random channel access process of the OFDMA technology is that the AP sends a trigger frame (TF) to trigger each STA to perform random access. In one trigger, the AP can allocate N random access resource units (RARU). The STA performs random access in one of the N RARUs.

In order to solve the problem of RU competition conflict, a back-off mechanism is proposed. Specifically, the STA maintains an orthogonal frequency division multiple access backoff counter (OFDMA backoff counter, OBO counter), and the initial value of the backoff counter (abbreviated as the initial OBO value) is a value randomly selected based on the OCW. After the backoff counter value is reduced to 0, the STA initiates random access on the RU. Therefore, the configuration of the OCW affects the selection of the initial value of the backoff counter, which in turn affects the access delay. For example, if the OCW value is small, the probability that the selected initial value is a small value is greater, that is, the time required for the value of the backoff counter to be reduced to 0 is relatively short, and it can be accessed as soon as possible.

The configuration of the OCW is not related to the service type of the STA. After the STA obtains the OCW configured by the AP, it selects the initial value based on the OCW for data of any service type. To put it simply, various types of services select initial values based on the same OCW. However, there are more and more types of STA services. Some types of services have higher requirements for delay, and some service types have higher requirements for delay. If various types of services select initial values based on the same OCW, it cannot meet the needs of diversified types of services.

In view of this, the present application provides a communication method and device, in which an AP can be configured with multiple OCWs, and multiple OCWs correspond to multiple access types. Therefore, the STA can select the appropriate OCW according to the access type of the data to be sent to meet the needs of business diversity.

The communication method provided in the embodiments of this application can be applied to a fourth generation (4th generation, 4G) communication system, such as long term evolution (LTE), and can also be applied to a fifth generation (5th generation, 5G) communication system. For example, 5G new radio (NR), or applied to various communication systems in the future.

The communication method provided by the embodiments of the present application may also be applicable to a wireless local area network (WLAN) system, and may be applicable to IEEE 802.11 system standards, such as the IEEE 802.11ax standard, or its next or next generation standards, The embodiment of the application does not limit this. The following takes the WLAN system as an example.

Refer to FIG. 1, which is a schematic diagram of a communication system provided by an embodiment of this application. As shown in Figure 1, it includes AP and multiple STAs within the coverage area of the AP. Taking 4 STAs as an example, they are STA1-STA4 respectively.

The AP and STA involved in the embodiment of the present application will be described below.

AP can also be called a hot spot. The AP can be connected to a server or a communication network. The AP itself is also a station. An AP is a device that is deployed in a wireless communication network or a WLAN network to provide wireless communication functions for its associated stations. The AP can be used as the hub of the WLAN system. APs can be base stations, routers, gateways, repeaters, communication servers, switches, or bridges. Among them, the base station may include various forms of macro base stations, micro base stations, and relay stations. Here, for the convenience of description, the above-mentioned devices are collectively referred to as APs in the embodiments of the present application.

STA can be a variety of user terminals, user devices, access devices, subscriber stations, subscriber units, mobile stations, user agents, user equipment or other names with wireless communication functions. Among them, user terminals can include various types of wireless communication. Functional handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment (UE), mobile station (MS), and terminal ), terminal equipment (terminal equipment), portable communication equipment, handsets, portable computing equipment, entertainment equipment, game equipment or systems, global positioning system equipment or any other suitable equipment configured for network communication via wireless media, etc. . Here, for the convenience of description, the above-mentioned devices are collectively referred to as STAs in the embodiments of the present application.

The STA can access the AP through random access. An achievable manner is that the AP allocates N resource units (resource units, RUs), and the STA performs random access on one of the N RUs. For example, referring to FIG. 2, the AP sends a trigger frame, and the trigger frame includes an indication of N RUs. For example, the N RUs include RU1-RU5. The STA randomly accesses one of the RUs of RU1-RU5. For example, STA1 randomly accesses on RU1, and STA2 randomly accesses on RU4. After receiving the access signals sent by STA1 and STA2, the AP replies with a block acknowledgement (BA).

FIG. 3 is a schematic flowchart of a communication method provided by an embodiment of this application. This method can be applied to the system architecture shown in FIG. 1. As shown in Figure 3, the process of the method includes:

S301: The STA receives multiple OCW parameters sent by the AP, where the multiple OCW parameters correspond to multiple access categories (AC).

OCW is a numerical range, such as a numerical range between a maximum value and a minimum value. Therefore, an "OCW parameter" in this application refers to a combination of a maximum value and a minimum value. For example, an OCW parameter is in the form of an interval range such as (minimum value, maximum value). Take 4 OCW parameters as an example, respectively OCW parameter 1-OCW parameter 4, for example, OCW parameter 1 = (minimum value 1, maximum value 1), OCW parameter 2 = (minimum value 2, maximum value 2), OCW parameter 3=(minimum value 3, maximum value 3), OCW parameter 4=(minimum value 4, maximum value 4).

One possible mechanism for using the minimum and maximum values of OCW is: referring to Fig. 4, assuming that the range of OCW is (5, 10). The STA preferentially selects a value (such as 3) from 0 to 5 as the initial value of the backoff counter, that is, the initial OBO value. When the value of the backoff counter drops to 0, the frame to be sent can be sent in the RARU indicated by the trigger frame. If the frame to be sent is not successfully sent, the initial OBO value can be increased, for example, the initial OBO value is doubled to increase to 6, and the increased initial OBO value (ie, 6) is used as the initial value of the backoff counter. When the value of the backoff counter drops to 0 again, the STA sends the frame to be sent in the RARU indicated by the next frame trigger frame. If the frame to be sent is still not successfully sent, continue to increase the initial OBO value, for example, increase to 9, and use the increased initial OBO value (ie 9) as the initial value of the backoff counter. When the value of the backoff counter drops to 0 , Send the frame to be sent in the RARU indicated by the trigger frame of the next frame. If the frame to be sent still cannot be successfully sent, since the OCW continues to double (that is, 18) on the basis of 9, it exceeds the maximum OCW value of 10, so the STA can re-select an initial OBO value between 0 and 5.

In some embodiments, the OCW parameter sent by the AP to the STA is (OCW min, OCW max); OCW min is the minimum value, and OCW max is the maximum value. When the STA implements the backoff mechanism, it determines the initial OBO value based on (A, B); where A=2 ^{OCW min} -1; B=2 ^{OCW max} -1. For example, the OCW parameters sent by AP to STA are (3, 5), 2 ³ -1= ^{7, 2 5} -1=31, that is, STA determines the initial OBO value based on (7, 31), for example, STA starts from 0-7 Choose a value as the initial value of the backoff counter. When the value of the backoff counter drops to 0, try to send the frame to be sent on the RARU indicated by the trigger frame. If the frame to be sent is not successfully sent, increase the initial OBO value, and try to send the frame to be sent on the RARU based on the increased initial OBO (the increased initial OBO value is less than or equal to 31).

Or, the OCW parameter sent by the AP to the STA is (OCW min, OCW max); OCW min and OCW max are expressed in binary, where OCW min occupies m bits; OCW max occupies n bits. When the STA implements the backoff mechanism, it determines the initial OBO value based on (A, B); A=2 ^m -1; B=2 ⁿ -1. For example, OCW min occupies ³ bits, A=2 3 -1=7; OCW max occupies ⁵ bits, B=2 5 -1=31; so STA determines the initial OBO value based on (7, 31).

In the embodiment of the present application, multiple OCW parameters correspond to multiple access types AC. For example, the multiple access types include at least two of the following:

Voice (voice, VO) category;

Video (video, VI) category;

Best effort (BE) category;

Background (background, BK) category;

Real-time application (RTA) category.

It should be understood that the above-mentioned five access types are only examples and are not limiting, and more types of access may also be included. It should be understood that if more types of access are included, the design idea of this application can also be used. The following mainly introduces four types of access types: voice VO, video VI, best-effort BE, and background BK as examples.

In some embodiments, multiple OCW parameters are sent in an action frame. The action frame may be any type of action frame, which is not limited in comparison with the embodiments of the present application.

In other embodiments, multiple OCW parameters can be sent in a beacon frame, a probe response frame, or an associate response frame; alternatively, they can also be sent in a re-association response frame or disassociation. Sent in the response frame.

In still other embodiments, multiple OCW parameters can be carried in the information element (information element) and sent in the uplink OFDMA-based random access (UL OFDMA-based random access, UORA) parameter set (parameter set) field or other fields. .

Refer to Figure 5, which is a schematic diagram of the UORA parameter set. As shown in Figure 5, the UORA parameter set field includes an OCW range field, and the OCW range field includes OCW parameters, that is, OCW maximum and minimum values. In other words, only one OCW parameter field is included in the UORA parameter set.

In the embodiment of this application, referring to FIG. 6, the UORA parameter set includes multiple OCW range fields. Taking four OCW range fields as an example, that is, the first OCW range field, the second OCW range field, and the third OCW range field. The OCW range field and the fourth OCW range field. Among them, each OCW range field includes a maximum value and a minimum value.

For example, refer to FIG. 7, which is a schematic diagram of the UORA parameter set provided in an embodiment of this application. The UORA parameter set includes multiple OCW range fields, such as the following 4 fields:

1. OCW range AC_VO field, including the maximum and minimum OCW corresponding to the voice VO category.

2. OCW range AC_VI field, including the maximum and minimum values of the OCW corresponding to the video VI category.

3. OCW range AC_BE field, including the maximum and minimum values of OCW corresponding to the best-effort BE category.

4. OCW range AC_BK field, including the maximum and minimum OCW corresponding to the background BK category.

Figures 6 and 7 take voice VO, video VI, best-effort BE, and background BK as examples. When more access types are included, such as 6 access types, you can use similar For example, the UORA parameter set shown in Fig. 6 or Fig. 7 includes 6 different OCW range fields, and each OCW range field corresponds to a type of access.

In some embodiments, the priorities of different ACs may be different. For example, the priority relationship satisfies: voice (VO) category>video (VI) category>best effort (BE) category> Background (background, BK) class. In order to enable the to-be-sent frames of ACs with a higher priority to be sent as soon as possible, the maximum and/or minimum OCWs corresponding to ACs with different priorities are different. For example, referring to FIG. 8, the minimum values of the first OCW to the fourth OCW are different. The first OCW corresponds to the voice VO category, the second OCW corresponds to the video category VI, the third OCW corresponds to the best effort category BE, and the fourth OCW corresponds to the background BK. In order to satisfy the priority, the minimum value of the first OCW is smaller than the minimum value of the second OCW, the minimum value of the second OCW is smaller than the minimum value of the third OCW, and the minimum value of the third OCW is smaller than the minimum value of the fourth OCW. For example, the first OCW=(5,30), the second OCW=(10,30), the third OCW=(15,30), and the fourth OCW=(20,30). Among them, the smaller the minimum value of the OCW, the greater the probability that the frame to be sent will be sent as soon as possible. Therefore, the minimum value of the first OCW is the smallest to ensure that the frame to be sent of the voice VO type with the highest priority is sent as soon as possible. The specific content will be introduced later.

In Figure 8, the four OCWs have different minimum values and the same maximum values as an example. In fact, the maximum values of the four OCWs may also be different, which is not limited in the embodiment of the present application.

S302: The STA receives a trigger frame sent by the AP.

Optionally, the AP may broadcast the trigger frame periodically according to a certain period; or, the AP may first perform uplink service collection to determine which STAs have uplink data to transmit. The AP's uplink service collection process is: the AP sends a buffer state report poll (BSRP) frame. After the STA that has uplink data to send receives the BSRP, according to the channel division indicated in the BSRP frame, it randomly selects a subchannel to send a buffer state report (buffer state report, BSR), and reports to the AP that there is uplink data to send in its buffer area. After the AP completes the uplink data collection, the AP sends a trigger frame to trigger the uplink data transmission.

The trigger frame is described below.

For example, see Fig. 9, which is an example diagram of a trigger frame. The trigger frame includes indications of multiple RUs. The indication of the RU, such as the RU identifier, is used to distinguish different RUs, such as RU1-RU6. Among them, each RU identifier corresponds to an association identification code (AID) domain identifier (referred to as an AID identifier). When the AID identifier is AID0, it indicates that the RU is used for random access, and when the AID identifier is AID2045, it indicates that the RU is reserved for non-associated STAs for random access. Continuing to refer to Figure 9, RU1-RU3 corresponds to AID0, that is, RU1-RU3 is used for random access; RU4-RU5 corresponds to AID2045, that is, RU4-RU5 is reserved for random access by unassociated STAs. Other AID identifiers in the trigger frame, such as AID3 in FIG. 9 indicate that the RU is reserved for a specific STA.

S303: The STA selects an OCW parameter corresponding to the access type of the frame to be sent from among the multiple OCW parameters according to the access type of the frame to be sent.

Taking FIG. 8 as an example, assuming that the access type of the frame to be sent is the voice VO type, the first OCW corresponding to the voice VO is selected.

Assuming that the access type of the frame to be sent is a video VI, select the second OCW corresponding to the video VI.

Assuming that the access type of the frame to be sent is the best-effort BE type, the third OCE corresponding to the best-effort BE is selected.

Assuming that the access type of the frame to be sent is the background BK type, the fourth OCW corresponding to the background BK is selected.

S304: The STA determines an initial OBO value based on the selected OCW parameter.

In the embodiment of the present application, different ACs correspond to different OCWs. One possible implementation is that one type of AC corresponds to one backoff counter. Taking the above four ACs as an example, the voice VO category corresponds to the backoff counter 1, the video category VI corresponds to the backoff counter 2, the best effort BE category corresponds to the backoff counter 3, and the background BK category corresponds to the backoff counter 4.

Assuming that the access type of the frame to be sent is the voice VO type, the first OCW corresponding to the voice VO type is selected, and the STA randomly selects a value between 0 and the first OCW as the initial OBO value. For example, the first OCW=(5, 30), the STA can randomly select a value from 0-30 as the initial OBO value of the backoff counter 1.

Assuming that the access type of the frame to be sent is the video VI type, the second OCW corresponding to the video VI type is selected, and the STA randomly selects a value between 0 and the second OCW as the initial OBO value. For example, if the second OCW=(10, 30), the STA can randomly select a value from 0-30 as the initial OCO value of the backoff counter 2.

Assuming that the access type of the frame to be sent is the BE type, the third OCW corresponding to the BE type is selected, and the STA randomly selects a value between 0 and the third OCW as the initial OBO value. For example, the third OCW=(15, 30), the STA can randomly select a value within 0-30 as the initial OCO value of the backoff counter 3.

Assuming that the access type of the frame to be sent is the BK type, the fourth OCW corresponding to the BK type is selected, and the STA randomly selects a value between 0 and the fourth OCW as the initial OBO value. For example, the fourth OCW=(20, 30), the STA can randomly select a value from 0-30 as the initial OCO value of the backoff counter 4.

In general, the initial OBO value preferentially selects a value from 0 to the minimum value of OCW. In the embodiments of this application, the minimum values of OCW corresponding to different access types are different, which can achieve certain beneficial effects: following the above example, for voice VO, the initial OBO value is a value between 0 and 5, and for video VI, The initial OBO value is a value between 0-10; for the BE type, the initial OBO value is a value between 0-15; for the BK type, the initial OBO value is a value between 0-20. Therefore, if the OCW minimum value is set to a small value, the probability that the selected initial OBO value is a small value is greater, and the time required for the backoff counter to decrease to 0 is short, and the frame to be sent can be sent as soon as possible; otherwise, the OCW minimum value is set If it is larger, the probability that the selected initial OBO value is a small value is smaller, so the time required for the backoff counter to decrease to 0 is longer, and the time for sending the frame to be sent is longer. Therefore, if the minimum value of OCW for voice VO, video VI, BE, and BK is satisfied: voice VO<video VI<BE<BK, then the frame to be sent for voice VO has a larger The probability can be sent as soon as possible, that is, the priority of the voice VO class is high.

The foregoing initial OBO value is preferentially selected from 0 to the minimum value of OCW, which has certain beneficial effects: after STA selects an OBO initial value, when the value of the backoff counter is reduced to 0, it tries to send the pending transmission on the RARU indicated by the trigger frame Frame, if the frame to be sent is not successfully sent, increase the selected initial OBO value (for example, the initial OBO value doubles and increase), and use the increased initial OBO value as the initial value of the backoff counter. When the backoff counter value decreases again When it is 0, the frame to be sent is retransmitted on the RARU indicated by the next frame trigger frame. If the frame to be sent is still not successfully sent, the same method can be used to retransmit again until the initial OBO value increases to greater than the maximum value of OCW. . Therefore, it is preferred to select a value between 0-OCW minimum value as the initial OBO value, and there may be multiple opportunities to increase the initial OBO value, that is, multiple attempts to send the frame to be sent.

S305: The STA tries to send the frame to be sent on the RARU based on the initial OBO value.

It should be understood that when the value of the backoff counter is reduced to 0, the STA attempts to send the frame to be sent on the RARU. As mentioned earlier, STA can maintain 4 back-off counters, namely back-off counter 1-back-off counter 4; when back-off counter 1 is reduced to 0, the frame to be sent (voice VO type) is sent on RARU; when back-off counter 2 is reduced to When 0, send the frame to be sent on the RARU (video type VI); when the backoff counter 3 is reduced to 0, send the frame to be sent on the RARU (BE type); when the backoff counter 4 is reduced to 0, send on the RARU Frame to be sent (BK type).

There are many ways to decrease the value of the backoff counter, for example, decrease by 1 or another fixed value each time until it decreases to 0; or decrease by k, where k is the number of RUs included in the trigger frame for random access. That is to say, the number of RUs used for random access in the trigger frame is k. After the STA selects the initial OBO value of the backoff counter, it determines that the difference between the initial OBO value and k is less than or equal to 0. One of the RUs sends a frame to be sent.

The following uses voice VO as an example to introduce the process of STA trying to send frames to be sent on RARU.

Taking voice VO as an example, it corresponds to backoff counter 1, and the trigger frame shown in Figure 9 is taken as an example. The trigger frame includes RU1-RU3 for random access, that is, the number of RUs for random access k is 3.

In the following, the initial OBO values are 3 and 5 respectively as an example.

Example 1. Assuming that the initial OBO value is 3, as shown in Figure 10, the initial value of the backoff counter 1 is set to 3. Since the number k of RUs (ie RARUs) used for random access in the trigger frame is 3, the value of the backoff counter 1 is reduced to the difference between the initial OBO value and k (ie, 3-3=0). At this time, due to backoff The value of counter 1 is reduced to 0, and the STA can try to send a frame to be sent on one of RUs RU1-RU3.

Example 2, assuming that the initial OBO value is 5, as shown in Figure 11, the initial value of the backoff counter 1 is set to 5. Since the number of RUs used for random access in the trigger frame k is 3, the value of the backoff counter 1 is reduced to the difference between the initial OBO value and k, which is 2. -Select one RU in RU3 to send the frame to be sent. In this case, the value of the backoff counter 1 remains at 2, and this value is used as the initial value for the next calculation. STA waits for the next trigger frame, assuming that the number of RUs (RU corresponding to AID0) used for random access in the next trigger frame is k=2, that is, RU3-RU4; the value of backoff counter 1 is reduced from 2 to 0 (2- k=0), since the value of the backoff counter 1 is reduced to 0, the STA can send the frame to be sent on one RU of RU3-RU4.

There is a situation that when the value of the backoff counter 1 is reduced to 0, the STA sends the frame to be sent on the RU indicated by the trigger frame for random access, but the transmission is not successful, for example, other STAs also send on the RU Frame to be sent. In this case, the STA can increase the selected initial OBO value, and use the increased initial OBO value as the initial value of the backoff counter 1. When the backoff counter 1 drops to 0 again, it tries to trigger the RURA indicated by the frame in the next frame. Resend the frame to be sent on the computer. Continuing to use the above example 1, when the value of the backoff counter 1 is reduced to 0, and the frame to be sent is not successfully sent on the RARU, the initial OBO value is increased, for example, doubled, that is, the initial OBO value is increased to 6. When the STA receives the next trigger frame, if the number of RUs used for random access in the next trigger frame is k, and 6-k is less than or equal to 0, the STA can trigger the random access in the next frame The frame to be sent is retransmitted on the RU. If 6-k is greater than 0, continue to wait for the next trigger frame, and use the result of 6-k as the initial value of the backoff counter for the next calculation, and so on.

The above takes the voice VO class as an example to introduce, the principles of other access types are similar, and the details are not repeated.

The following uses an example to fully introduce the technical solutions provided by the embodiments of the present application.

Assume that the STA has two frames to be sent, namely the first frame to be sent and the second frame to be sent. Among them, the access type of the first frame to be sent is the voice VO type, and the access type of the second frame to be sent is the video VI type.

For the first frame to be sent, the STA selects the first OCW corresponding to the voice VO category, and the STA randomly selects a value between 0 and the minimum value of the first OCW as the initial OBO value. For example, the first OCW=(5, 30), the STA selects a value from 0-5 as the initial OBO value, assuming 3 is selected. As shown in FIG. 12, the number of RUs whose AID is AID0 in the first trigger frame received by the STA is k=3, that is, RU1-RU3. With the initial OBO value -k=3-3=0, the STA can try to send the first frame to be sent on one RU of RU1-RU3.

As an example, the STA may randomly select an RU from RU1-RU3, and then send the first frame to be sent in the RU. In this manner, there may be a situation where the first frame to be sent cannot be successfully sent on the selected RU, because the selected RU may also be preempted by other STAs.

In the above process, although the initial OBO value -k=3-3=0, the first frame to be sent is not successfully sent. A possible implementation manner is that the STA adjusts the initial OBO value (that is, 3), for example, increases the initial OBO value, for example, adjusts the initial OBO value from 3 to 6, that is, doubles. After adjusting the initial OBO value, it will be used at the next opportunity (the next trigger frame). The method used is similar and will not be repeated. In the same way, when the first frame to be sent is still successfully sent in the next opportunity, continue to increase the initial OBO value until it reaches the maximum value of OCW.

For the second frame to be sent, the STA selects the second OCW corresponding to the video category VI, and the STA randomly selects a value between 0 and the minimum value of the second OCW as the initial OBO value. For example, the second OCW=(10,30), the STA selects a value from 0-10 as the initial OBO value, assuming that 5 is selected. As shown in FIG. 12, for the video category VI, the selected initial OBO value-k=5-3=2, so the second frame to be sent needs to wait for the next trigger frame. At this time, the STA may set the value of the backoff counter 2 of the second frame to be sent to 2.

Referring to FIG. 12, the number of RUs with AID identification AID0 in the second trigger frame (the next trigger frame of the first trigger frame) received by the STA is k=2. Since the second data to be sent was not successfully sent in the opportunity of the first trigger frame, the backoff counter 2 in the second to be sent frame was calculated and set to 2 (the result of the previous calculation), and k=2 in the second trigger frame, so 2 -2=0, the STA can select one RU from RU3-RU4 to send the second frame to be sent.

In the same way, if the STA does not successfully send the second frame to be sent, the STA can adjust the initial OBO value to 5, such as doubling it to 10, and use the adjusted initial OBO value at the next opportunity (the next trigger frame). The method used is similar and will not be repeated. In the same way, when the second frame to be sent is still not successfully sent in the next opportunity, continue to increase the initial OBO value until it reaches the maximum value of OCW.

From the above description, comparing the first frame to be sent and the second frame to be sent, the selectable range of the initial OBO value of the first frame to be sent is 0-5, and the range of the initial OBO value of the second frame to be sent is 0- 10. Therefore, there is a higher probability that the initial OBO value of the first frame to be sent is smaller than the initial OBO value of the second frame to be sent. For example, the initial OBO value of the first frame to be sent is 3, the initial OBO value of the second frame to be sent is 5, and the number of RUs in the first trigger frame is 3, so the initial OBO value of the first frame to be sent (ie 3) The time required to decrease to 0 is relatively short, while the time required for the initial OBO value of the second frame to be sent (that is, 5) to decrease to 0 is relatively long. Therefore, the transmission delay of the first frame to be sent is relatively small. The first frame to be sent is of the voice VO type, and the second frame to be sent is of the video VI type, that is, the transmission delay of the voice VO type is smaller than that of the video VI type. In this way, it can be ensured that the data with higher priority (voice VO) can be successfully sent as soon as possible.

In addition, for the first frame to be sent, if it is not successfully sent on the RARU, the STA increases the initial OBO value, and uses the increased initial OBO value as the initial value of the backoff counter 1. When the value of the backoff counter 1 drops to 0 , Resend the first frame to be sent on the RARU. Assuming that the initial value of OBO increases in the process, the changes are: 3, 6, 12, 24, and 30. In the same way, the change of the initial OBO value of the second frame to be sent is: 5, 10, 20, and 30. Therefore, the number of adjustments of the initial OBO value of the first frame to be sent (voice VO type) is greater than the number of adjustments of the initial OBO value of the second frame to be sent (video VI type). In other words, data with higher priority (voice VO) has more chances to be sent.

In the above embodiment, the sending process of frames to be sent of different ACs in a STA is introduced. The following describes the process of multiple STAs sending frames to be sent.

Take the scenario shown in Figure 1 as an example to introduce the sending process of the frames to be sent of STA1-STA4.

Referring to FIG. 13, assuming that STA1 is an associated STA, an AID identifier, such as AID5, is stored in STA1. After STA1 receives the trigger frame, it judges whether there is AID5 among the multiple AID identifiers included in the trigger frame. If it exists, then the RU corresponding to AID5 is the RU used by STA1. If it does not exist, select the RU corresponding to AID0 (ie RARU) . It can be seen from Figure 13 that AID5 is not included in the trigger frame, so STA1 selects the RU of AID0, namely RU1-RU3. Suppose again that the backoff counter maintained by STA1 is 1, and the initial OBO value (initial OBO) selected by STA1 is 3, and the number of RUs corresponding to AID0 is k=3, then the initial OBO value -k=3-3=0, so STA1 You can select one of RU1-RU3 to send the frame to be sent. For example, send the frame to be sent on RU1. Continuing to refer to FIG. 13, after SIFS, the AP receives a frame to be sent from STA1 on RU2. After SIFS, AP can reply to BA.

Assume that STA2 is an associated STA, and an AID identifier, such as AID7, is stored in STA1. In the same way, after STA1 receives the trigger frame, it judges whether there is AID7 among the multiple AID identifiers included in the trigger frame. If it exists, then the RU corresponding to AID7 is the RU used by STA2. If it does not exist, STA2 selects the RU corresponding to AID0 ( Namely RARU) Namely RU1-RU3. Suppose STA2 maintains backoff counter 2, and the initial OBO value selected by STA2 is 5, and the number of RUs corresponding to AID0 is k=3, then the initial OBO value -k=5-3=2, and STA1 cannot be on RU1-RU3 To send a frame to be sent, you need to wait for the next trigger frame to select an RU.

Assuming that STA3 is an unassociated STA, STA3 searches for the RU corresponding to AID2045, namely RU4-RU5. Suppose STA3 maintains backoff counter 3, and the initial OBO value selected by STA3 is 4, and the number of RUs corresponding to AID0 is k=2, then the initial OBO value -k=4-2=2, STA3 cannot be on RU4-RU5 To send a frame to be sent, you need to wait for the next trigger frame to select an RU.

Assuming that STA4 is an associated STA, an AID identifier, such as AID3, is stored in STA4. After receiving the trigger frame, STA4 determines that AID3 exists among the multiple AID identifiers included in the trigger frame, and then sends the frame to be sent on the RU corresponding to AID3 (that is, RU6). Continuing to refer to FIG. 13, after SIFS, the AP receives a frame to be sent from STA4 on RU6. After SIFS, AP can reply to BA.

In the last opportunity (the last trigger frame), STA2 and STA3 did not send the frame to be sent, so after receiving the next trigger frame, STA2 and STA3 continue to send the frame to be sent in the same way. Continuing to refer to FIG. 13, there is no AID7 in the next trigger frame, STA2 selects the RU of AID0, and the number of RUs corresponding to AID0 in the next trigger frame is k=2, that is, RU1-RU2. At this time, the value of the backoff counter 2 maintained by STA2 is 2 (the last calculation result), and the value -k=2-2=0, so STA2 can select RU1 or RU2 to send the frame to be sent, for example, select RU2 to send the frame to be sent. Send the frame.

STA3 determines the number of RUs of AID2045 in the next trigger frame k=2, that is, RU3-RU4. At this time, the value of the backoff counter 3 maintained by STA3 is 2 (the last calculation result), and the value -k=2-2=0, so STA3 can select RU3 or RU4 to send the frame to be sent, for example, select RU4 to send the frame to be sent. Send the frame.

For STA4, the initial OBO value selected in the last opportunity was 2, but because the trigger frame includes the RU of AID3, namely RU6, the initial OBO value is not used, and at the next opportunity, STA4 can use the initial OBO selected in the previous opportunity. 2. Since the next trigger frame does not include the RU of AID3, STA4 selects the RU of AID0, and the number of RUs corresponding to AID0 in the next trigger frame is k=2, that is, RU1-RU2. At this time, the value of the backoff counter 2 maintained by STA4 is 2, and the value -k=2-2=0, so STA4 can select RU1 or RU2 to send the frame to be sent, for example, select RU1 to send the frame to be sent.

Similar to the above-mentioned concept, as shown in FIG. 14, an embodiment of the present application further provides an apparatus 1400, and the apparatus 1400 includes a transceiver unit 1402 and a processing unit 1401.

In an example, the device 1400 is used to implement the function of the STA in the foregoing method. The device may be an STA or a device in the STA, such as a chip system.

Wherein, the transceiver unit 1402 is configured to receive multiple orthogonal frequency division multiple access contention window OCW parameters sent by the AP, and the multiple OCW parameters correspond to multiple access types;

The transceiver unit 1402 is further configured to receive a trigger frame, where the trigger frame includes an indication of a random access resource unit RARU;

The processing unit 1401 is configured to select an OCW parameter corresponding to the access type of the frame to be sent among the multiple OCW parameters, and determine an initial orthogonal frequency division multiple access backoff OBO value based on the selected OCW parameter;

The processing unit 1401 is configured to try to send the frame to be sent in the RARU based on the initial OBO value.

In a possible design, the multiple access types include at least two of the following:

Voice VO category;

Video VI category;

Best-effort BE category;

Background BK category;

Real-time application of RTA class.

In a possible design, the minimum value of the OCW parameter corresponding to the voice VO category is smaller than the minimum value of the OCW parameter corresponding to the video category; the minimum value of the OCW parameter corresponding to the video category is smaller than the best effort The minimum value of the OCW parameter corresponding to the class; the minimum value of the OCW parameter corresponding to the best-effort class is smaller than the minimum value of the OCW parameter corresponding to the background class.

In a possible design, the multiple OCW parameters are in the uplink orthogonal frequency division multiple access random access UORA parameter set field or other fields in the information element.

In a possible design, the multiple OCW parameters are in a beacon frame, a probe response frame, or an association response frame.

In a possible design, the processing unit 1301 is specifically configured to: the number of RARUs is k, and k is an integer greater than or equal to 1; when it is determined that the difference between the initial OBO value and the k is less than or equal to 0 And try to send the frame to be sent on one RARU among the k RARUs through the transceiver unit.

In an example, the device 1400 is used to implement the function of the AP in the foregoing method. The device can be an AP or a device in the AP, such as a chip system.

Wherein, the processing unit 1401 is configured to determine multiple orthogonal frequency division multiple access contention window OCW parameters, and the multiple OCW parameters correspond to multiple access types;

The transceiver unit 1402 is configured to send the multiple OCW parameters.

In a possible design, the multiple access types include at least two of the following:

Voice VO category;

Video VI category;

Best-effort BE category;

Background BK category;

Real-time application of RTA class.

In a possible design, the minimum value of the OCW parameter corresponding to the voice VO category is smaller than the minimum value of the OCW parameter corresponding to the video category; the minimum value of the OCW parameter corresponding to the video category is smaller than the best effort The minimum value of the OCW parameter corresponding to the class; the minimum value of the OCW parameter corresponding to the best-effort class is smaller than the minimum value of the OCW parameter corresponding to the background class.

In a possible design, the multiple OCW parameters are sent in an uplink orthogonal frequency division multiple access random access UORA parameter set field or other fields in the information element.

In a possible design, the multiple OCW parameters are sent in a beacon frame, a probe response frame, or an association response frame.

For the specific execution process of the processing unit 1401 and the transceiving unit 1402, please refer to the record in the above method embodiment. The division of modules in the embodiments of this application is illustrative, and is only a logical function division. In actual implementation, there may be other division methods. In addition, the functional modules in the various embodiments of this application can be integrated into one process. In the device, it can also exist alone physically, or two or more modules can be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or software function modules.

As another optional variation, the device may be a chip system. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices. Exemplarily, the device includes a processor and an interface, and the interface may be an input/output interface. Among them, the processor completes the function of the aforementioned processing unit 1401, and the interface completes the function of the aforementioned transceiver unit 1402. The device may also include a memory, where the memory is used to store a program that can be run on the processor, and the processor implements the method of each of the foregoing embodiments when the program is executed by the processor.

Similar to the above-mentioned concept, as shown in FIG. 15, an embodiment of the present application further provides an apparatus 1500. The device 1500 includes: a communication interface 1501, at least one processor 1502, and at least one memory 1503. The communication interface 1501 is used to communicate with other devices through a transmission medium, so that the device used in the apparatus 1500 can communicate with other devices. The memory 1503 is used to store computer programs. The processor 1502 calls the computer program stored in the memory 1403, and transmits and receives data through the communication interface 1501 to implement the method in the foregoing embodiment.

Exemplarily, when the device is the foregoing AP, the memory 1503 is used to store a computer program; the processor 1502 calls the computer program stored in the memory 1503, and executes the method executed by the AP in the foregoing embodiment through the communication interface 1501. When the device is an STA, the memory 1503 is used to store a computer program; the processor 1502 calls the computer program stored in the memory 1503, and executes the method executed by the STA in the foregoing embodiment through the communication interface 1501.

In the embodiment of the present application, the communication interface 1501 may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces. The processor 1502 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and may implement or execute the The disclosed methods, steps and logic block diagrams. The general-purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor. The memory 1503 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., and may also be a volatile memory, such as random access memory (random access memory). -access memory, RAM). The memory is any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this. The memory in the embodiment of the present application may also be a circuit or any other device capable of realizing a storage function. The memory 1503 is coupled with the processor 1502. The coupling in the embodiments of the present application is an interval coupling or a communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. As another implementation, the memory 1503 may also be located outside the apparatus 1500. The processor 1502 may cooperate with the memory 1503 to operate. The processor 1502 can execute program instructions stored in the memory 1503. At least one of the at least one memory 1503 may also be included in the processor 1502. The embodiment of the present application does not limit the connection medium between the communication interface 1501, the processor 1502, and the memory 1503. For example, in the embodiment of the present application in FIG. 15, the memory 1503, the processor 1502, and the communication interface 1501 may be connected by a bus, and the bus may be divided into an address bus, a data bus, and a control bus.

It can be understood that the apparatus in the embodiment shown in FIG. 14 may be implemented by the apparatus 1500 shown in FIG. 15. Specifically, the processing unit 1401 may be implemented by the processor 1502, and the transceiver unit 1402 may be implemented by the communication interface 1501.

The methods provided 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 by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present invention are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, network equipment, user equipment, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium (for example, a solid state drive (SSD)), etc.

As mentioned above, the above embodiments are only used to introduce the technical solutions of the present application in detail, but the descriptions of the above embodiments are only used to help understand the methods of the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention. Variations or replacements that can be easily conceived by those skilled in the art should be covered by the protection scope of the embodiments of the present invention.

Claims (19)

A communication method, characterized in that it comprises: A station (STA) receives multiple orthogonal frequency division multiple access contention window (OCW) parameters sent by an access point (AP), where the multiple OCW parameters correspond to multiple access types; The STA receives a trigger frame, and the trigger frame includes an indication of a random access resource unit (RARU); The STA selects an OCW parameter corresponding to the access type of the frame to be sent among the multiple OCW parameters, and determines an initial Orthogonal Frequency Division Multiple Access (OBO) value based on the selected OCW parameter; The STA attempts to send the frame to be sent in the RARU based on the initial OBO value. The method according to claim 1, wherein the multiple access types include at least two of the following: Voice (VO) category; Video (VI) category; Best Effort (BE) category; Background (BK) category; Real-time application (RTA) category. The method of claim 2, wherein: The minimum value of the OCW parameter corresponding to the VO category is smaller than the minimum value of the OCW parameter corresponding to the video category; The minimum value of the OCW parameter corresponding to the video category is smaller than the minimum value of the OCW parameter corresponding to the best effort category; The minimum value of the OCW parameter corresponding to the best effort class is smaller than the minimum value of the OCW parameter corresponding to the background class. The method according to any one of claims 1 to 3, wherein the uplink of the multiple OCW parameters in the information element is based on an orthogonal frequency division multiple access (UORA) parameter set field or in other fields . The method according to any one of claims 1 to 4, wherein the multiple OCW parameters are in a beacon frame, a probe response frame, or an association response frame. The method according to any one of claims 1-5, wherein the STA attempts to send the frame to be sent in the RARU based on the initial OBO value, comprising: The number of RARUs is k, and k is an integer greater than or equal to 1; When it is determined that the difference between the initial OBO value and the k is less than or equal to 0, an attempt is made to send the frame to be sent on one RARU among the k RARUs. A communication method, characterized in that it comprises: The access point (AP) determines multiple orthogonal frequency division multiple access contention window (OCW) parameters, and the multiple OCW parameters correspond to multiple access types; The AP sends the multiple OCW parameters. The method according to claim 7, wherein the multiple access types include at least two of the following: Voice (VO) category; Video (VI) category; Best Effort (BE) category; Background (BK) category; Real-time application (RTA) category. The method according to claim 7 or 8, wherein the multiple OCW parameters are sent in a beacon frame, a probe response frame, or an association response frame. A communication device, characterized in that it comprises: A transceiver unit, configured to receive multiple orthogonal frequency division multiple access contention window (OCW) parameters sent by an access point (AP), where the multiple OCW parameters correspond to multiple access types; The transceiver unit is further configured to receive a trigger frame, where the trigger frame includes an indication of a random access resource unit (RARU); A processing unit, configured to select an OCW parameter corresponding to the access type of the frame to be sent among the multiple OCW parameters, and determine an initial orthogonal frequency division multiple access backoff (OBO) value based on the selected OCW parameter; The processing unit is configured to try to send the frame to be sent in the RARU based on the initial OBO value. The device according to claim 10, wherein the multiple access types include at least two of the following: Voice (VO) category; Video (VI) category; Best Effort (BE) category; Background (BK) category; Real-time application (RTA) category. The device according to claim 10 or 11, wherein the multiple OCW parameters are in a beacon frame, a probe response frame, or an association response frame. The device according to any one of claims 10-12, wherein the processing unit is specifically configured to: The number of RARUs is k, and k is an integer greater than or equal to 1; When it is determined that the difference between the initial OBO value and the k is less than or equal to 0, the transceiver unit attempts to send the frame to be sent on one RARU among the k RARUs. A communication device, characterized in that it comprises: A processing unit, configured to determine multiple orthogonal frequency division multiple access contention window (OCW) parameters, where the multiple OCW parameters correspond to multiple access types; The transceiver unit is configured to send the multiple OCW parameters. The device according to claim 14, wherein the multiple access types include at least two of the following: Voice (VO) category; Video (VI) category; Best Effort (BE) category; Background (BK) category; Real-time application (RTA) category. The device according to claim 14 or 15, wherein the multiple OCW parameters are sent in a beacon frame, a probe response frame, or an association response frame. A communication device, characterized in that it comprises at least one processor, the at least one processor is coupled with at least one memory; the at least one processor is configured to execute a computer program or instruction stored in the at least one memory, So that the device executes the method according to any one of claims 1-9. A communication system, characterized in that it comprises A station (STA) for implementing the method of any one of claims 1 to 6; and, An access point (AP) for implementing the method of any one of claims 7 to 9. A computer program product, characterized in that, when the computer program product runs on a computer, the computer is caused to execute the method according to any one of claims 1 to 9.

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