Method of data transmission and communication device

Abstract

The embodiment of the present application provides a data transmission method and communication device, the method comprises the following steps: an access point receives restricted target wake-up time establishment request information sent by a station, the restricted target wake-up time establishment request information is used for requesting to establish a restricted target wake-up time; the access point sends restricted target wake-up time response information to the station, the restricted target wake-up time response information is used for responding to the restricted target wake-up time establishment request information, wherein the restricted target wake-up time establishment request information or the restricted target wake-up time response information comprises indication information of a first access category corresponding to low-latency service of the station. By flexibly configuring a new access category for the low-latency service by the station or the access point, the embodiment of the present application can give the station or the access point autonomy and selectivity when configuring the access category for the low-latency service, and can better meet the transmission requirement of the low-latency service of the station.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a method and communication device for data transmission. Background Technology

[0002] WiFi-6 defines a power-saving technology called Target Wake Time (TWT). A station (STA) establishes a TWT with an access point (AP) to determine its active and sleep periods, thereby achieving energy savings.

[0003] The 802.11be protocol, building upon the existing TWT mechanism, defines a new restricted TWT (r-TWT) for low-latency services. In the r-TWT mechanism, the traffic identifier (TID) for a STA's low-latency service is determined separately by the STA and the AP. This may result in different STAs assigning different TIDs to the same type of low-latency service. This could lead to some low-latency services being assigned lower-priority access categories (ACs) when using enhanced distribution channel access (EDCA), thus failing to guarantee the low-latency transmission requirements of these services.

[0004] Therefore, how to better meet the low-latency service transmission requirements of STA in the r-TWT mechanism is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] This application provides a data transmission method and communication device that can better meet the low-latency transmission requirements of STA's low-latency services in the r-TWT mechanism.

[0006] In a first aspect, a data transmission method is provided, comprising: an access point receiving restricted target wake-up time establishment request information sent by a site, the restricted target wake-up time establishment request information being used to request the establishment of a restricted target wake-up time; the access point sending restricted target wake-up time response information to the site, the restricted target wake-up time response information being used to respond to the restricted target wake-up time establishment request information, wherein the restricted target wake-up time establishment request information or the restricted target wake-up time response information includes indication information of a first access category corresponding to the site's low-latency service.

[0007] By having the site carry the indication information of the first AC in the establishment request information, the embodiments of this application can give the site the right to independently judge and choose whether to change the AC corresponding to the low latency service. This allows for more flexible allocation of suitable ACs to low latency services. Furthermore, this can effectively alleviate the problem that the default AC of some low latency services cannot meet their low latency requirements due to the default mapping relationship of the UP to the AC, and better ensure that the transmission requirements of the site's low latency services are met in the r-TWT mechanism.

[0008] By allowing the access point to autonomously decide whether to allocate a new AC for the low-latency services of the site, the embodiments of this application can empower the access point with the right to make autonomous judgments, thereby enabling more flexible allocation of suitable ACs for low-latency services. Furthermore, this can effectively alleviate the problem that the default ACs of some low-latency services cannot meet their low-latency requirements due to the default mapping relationship of UP to ACs, and better ensure that the transmission requirements of the low-latency services of the site in the r-TWT mechanism are met.

[0009] By flexibly configuring a new AC for low-latency services by the site or access point, this application embodiment, on the one hand, avoids the constraint of configuring the AC corresponding to low-latency services according to Table 3, thus possessing flexibility; on the other hand, this application embodiment can grant the site or access point autonomy and choice when configuring the AC for low-latency services. Therefore, based on the above technical solution, this application embodiment can flexibly configure the AC corresponding to the low-latency services of the STA, thereby better meeting the low-latency transmission requirements of the STA's low-latency services in the r-TWT mechanism.

[0010] In conjunction with the first aspect, in some possible implementations of the first aspect, the restricted target wake-up time response information includes first indication information. When the first indication information is a first value, the first value is used to indicate that the restricted target wake-up time response information includes indication information of a first access category; or, when the first indication information is a second value, the second value is used to indicate that the restricted target wake-up time response information does not include indication information of a first access category.

[0011] This application embodiment uses indication information to indicate whether the response information sent by the access point to the site includes the indication information of the first AC or whether the indication information of the first AC included in the response information is valid. In this way, it can better help the site determine whether the access point has changed the AC corresponding to the site's low latency service.

[0012] In conjunction with the first aspect, in some possible implementations of the first aspect, the restricted target wake-up time establishment request information includes second indication information. When the second indication information is a first value, the first value is used to indicate that the restricted target wake-up time establishment request information includes indication information of the first access category; or, when the second indication information is a second value, the second value is used to indicate that the restricted target wake-up time establishment request information does not include indication information of the first access category.

[0013] This application embodiment uses indication information to indicate whether the establishment request information sent by the site to the access point includes the indication information of the first AC or whether the indication information of the first AC included in the response information is valid. In this way, it can better help the access point determine whether the site requests to change the AC corresponding to the low latency service.

[0014] In conjunction with the first aspect, in some possible implementations of the first aspect, when the restricted target wake-up time establishment request information includes indication information of the first access category, the restricted target wake-up time response information includes third indication information. When the third indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, when the third indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category.

[0015] In this embodiment, the access point judges the indication information of the first AC corresponding to the low-latency service of the site in the establishment request information sent by the site, and determines whether to agree to or reject the first AC. Thus, this embodiment provides the site with the right to independently judge and select the first AC corresponding to the site's low-latency service, and also allows for more flexible allocation of suitable ACs to low-latency services, better ensuring that the transmission requirements of low-latency services are met. Through this method, this embodiment can overcome the limitations of configuring the AC corresponding to the low-latency service according to Table 3.

[0016] In conjunction with the first aspect, in some possible implementations of the first aspect, the second value is also used to indicate that the restricted target wake-up time response information also includes indication information of the second access category corresponding to the low-latency service of the site.

[0017] In conjunction with the first aspect, in some possible implementations of the first aspect, when the restricted target wake-up time establishment request information includes indication information of the first access category, the restricted target wake-up time response information includes fourth indication information. When the fourth indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, when the fourth indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category; when the fourth indication information is a third value, the third value is used to indicate that the restricted target wake-up time response information also includes indication information of the third access category corresponding to the low-latency service of the site.

[0018] In this embodiment, the access point judges the indication information of the first AC corresponding to the low-latency service of the site in the establishment request information sent by the site, and determines whether to agree to or reject the first AC. Thus, this embodiment provides the site with the right to independently judge and select the first AC corresponding to the site's low-latency service, and also allows for more flexible allocation of suitable ACs to low-latency services, better ensuring that the transmission requirements of low-latency services are met. Through this method, this embodiment can overcome the limitations of configuring the AC corresponding to the low-latency service according to Table 3.

[0019] In conjunction with the first aspect, in some possible implementations of the first aspect, the restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information, which includes an access category field used to carry indication information of a first access category.

[0020] In conjunction with the first aspect, in some possible implementations of the first aspect, the restricted target wake-up time service information further includes a service information control field, which is located before the access category field, and the service control information field is used to carry one of the following information: first indication information, second indication information, third indication information, or fourth indication information.

[0021] In conjunction with the first aspect, in some possible implementations of the first aspect, the indication information of the first access category is an access category index value or a bit map.

[0022] Secondly, a data transmission method is provided, comprising: a site sending a restricted target wake-up time establishment request to an access point, the restricted target wake-up time establishment request being used to request the establishment of a restricted target wake-up time; the site receiving a restricted target wake-up time response from the access point, the restricted target wake-up time response being used to respond to the restricted target wake-up time establishment request, wherein the restricted target wake-up time establishment request or the restricted target wake-up time response includes indication information of a first access category corresponding to the site's low-latency service.

[0023] In conjunction with the second aspect, in some possible implementations of the second aspect, the restricted target wake-up time response information includes first indication information. When the first indication information is a first value, the first value is used to indicate that the restricted target wake-up time response information includes indication information of a first access category; or, when the first indication information is a second value, the second value is used to indicate that the restricted target wake-up time response information does not include indication information of a first access category.

[0024] In conjunction with the second aspect, in some possible implementations of the second aspect, the restricted target wake-up time establishment request information includes second indication information. When the second indication information is a first value, the first value is used to indicate that the restricted target wake-up time establishment request information includes indication information of the first access category; or, when the second indication information is a second value, the second value is used to indicate that the restricted target wake-up time establishment request information does not include indication information of the first access category.

[0025] In conjunction with the second aspect, in some possible implementations of the second aspect, when the restricted target wake-up time establishment request information includes indication information of the first access category, the restricted target wake-up time response information includes third indication information. When the third indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, when the third indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category.

[0026] In conjunction with the second aspect, in some possible implementations of the second aspect, the second value is also used to indicate that the restricted target wake-up time response information also includes indication information of the second access category corresponding to the low-latency service of the site.

[0027] In conjunction with the second aspect, in some possible implementations of the second aspect, when the restricted target wake-up time establishment request information includes indication information of the first access category, the restricted target wake-up time response information includes fourth indication information. When the fourth indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, when the fourth indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category; when the fourth indication information is a third value, the third value is used to indicate that the restricted target wake-up time response information also includes indication information of the third access category corresponding to the low-latency service of the site.

[0028] In conjunction with the second aspect, in some possible implementations of the second aspect, the restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information, which includes an access category field used to carry indication information of a first access category.

[0029] In conjunction with the second aspect, in some possible implementations of the second aspect, the restricted target wake-up time service information further includes a service information control field, which is located before the access category field, and the service control information field is used to carry one of the following information: first indication information, second indication information, third indication information, or fourth indication information.

[0030] In conjunction with the second aspect, in some possible implementations of the second aspect, the indication information of the first access category is an access category index value or a bit map.

[0031] Thirdly, a communication apparatus is provided, comprising: a transceiver unit configured to receive restricted target wake-up time establishment request information sent by a site, the restricted target wake-up time establishment request information being used to request the establishment of a restricted target wake-up time; the transceiver unit is further configured to send restricted target wake-up time response information to the site, the restricted target wake-up time response information being used to respond to the restricted target wake-up time establishment request information, wherein the restricted target wake-up time establishment request information or the restricted target wake-up time response information includes indication information of a first access category corresponding to the site's low-latency service.

[0032] In conjunction with the third aspect, in some possible implementations of the third aspect, the restricted target wake-up time response information includes first indication information. When the first indication information is a first value, the first value is used to indicate that the restricted target wake-up time response information includes indication information of a first access category; or, when the first indication information is a second value, the second value is used to indicate that the restricted target wake-up time response information does not include indication information of a first access category.

[0033] In conjunction with the third aspect, in some possible implementations of the third aspect, the restricted target wake-up time establishment request information includes second indication information. When the second indication information is a first value, the first value is used to indicate that the restricted target wake-up time establishment request information includes indication information of the first access category; or, when the second indication information is a second value, the second value is used to indicate that the restricted target wake-up time establishment request information does not include indication information of the first access category.

[0034] In conjunction with the third aspect, in some possible implementations of the third aspect, when the restricted target wake-up time establishment request information includes indication information of the first access category, the restricted target wake-up time response information includes third indication information. When the third indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, when the third indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category.

[0035] In conjunction with the third aspect, in some possible implementations of the third aspect, the second value is also used to indicate that the restricted target wake-up time response information also includes indication information of the second access category corresponding to the low-latency service of the site.

[0036] In conjunction with the third aspect, in some possible implementations of the third aspect, when the restricted target wake-up time establishment request information includes indication information of the first access category, the restricted target wake-up time response information includes fourth indication information. When the fourth indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, when the fourth indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category; when the fourth indication information is a third value, the third value is used to indicate that the restricted target wake-up time response information also includes indication information of the third access category corresponding to the low-latency service of the site.

[0037] In conjunction with the third aspect, in some possible implementations of the third aspect, the restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information, which includes an access category field used to carry indication information of a first access category.

[0038] In conjunction with the third aspect, in some possible implementations of the third aspect, the restricted target wake-up time service information also includes a service information control field, which is located before the access category field, and the service control information field is used to carry one of the following information: first indication information, second indication information, third indication information, or fourth indication information.

[0039] In conjunction with the third aspect, in some possible implementations of the third aspect, the indication information of the first access category is an access category index value or a bit map.

[0040] Fourthly, a communication apparatus is provided, comprising: a transceiver unit configured to send restricted target wake-up time establishment request information to an access point, the restricted target wake-up time establishment request information being used to request the establishment of a restricted target wake-up time; the transceiver unit is further configured to receive restricted target wake-up time response information sent by the access point, the restricted target wake-up time response information being used to respond to the restricted target wake-up time establishment request information, wherein the restricted target wake-up time establishment request information or the restricted target wake-up time response information includes indication information of a first access category corresponding to the low-latency service of the site.

[0041] In conjunction with the fourth aspect, in some possible implementations of the fourth aspect, the restricted target wake-up time response information includes first indication information. When the first indication information is a first value, the first value is used to indicate that the restricted target wake-up time response information includes indication information of a first access category; or, when the first indication information is a second value, the second value is used to indicate that the restricted target wake-up time response information does not include indication information of a first access category.

[0042] In conjunction with the fourth aspect, in some possible implementations of the fourth aspect, the restricted target wake-up time establishment request information includes second indication information. When the second indication information is a first value, the first value is used to indicate that the restricted target wake-up time establishment request information includes indication information of the first access category; or, when the second indication information is a second value, the second value is used to indicate that the restricted target wake-up time establishment request information does not include indication information of the first access category.

[0043] In conjunction with the fourth aspect, in some possible implementations of the fourth aspect, when the restricted target wake-up time establishment request information includes indication information of the first access category, the restricted target wake-up time response information includes third indication information. When the third indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, when the third indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category.

[0044] In conjunction with the fourth aspect, in some possible implementations of the fourth aspect, the second value is also used to indicate that the restricted target wake-up time response information also includes indication information of the second access category corresponding to the low-latency service of the site.

[0045] In conjunction with the fourth aspect, in some possible implementations of the fourth aspect, when the restricted target wake-up time establishment request information includes indication information of the first access category, the restricted target wake-up time response information includes fourth indication information. When the fourth indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, when the fourth indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category; when the fourth indication information is a third value, the third value is used to indicate that the restricted target wake-up time response information also includes indication information of the third access category corresponding to the low-latency service of the site.

[0046] In conjunction with the fourth aspect, in some possible implementations of the fourth aspect, the restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information, which includes an access category field used to carry indication information of a first access category.

[0047] In conjunction with the fourth aspect, in some possible implementations of the fourth aspect, the restricted target wake-up time service information also includes a service information control field, which is located before the access category field, and the service control information field is used to carry one of the following information: first indication information, second indication information, third indication information, or fourth indication information.

[0048] In conjunction with the fourth aspect, in some possible implementations of the fourth aspect, the indication information of the first access category is an access category index value or a bit map.

[0049] Fifthly, a computer-readable storage medium is provided, the computer storage medium storing program instructions that, when executed by a computer, cause the computer to perform the method as described in the first aspect and any possible implementation thereof, or in the second aspect and any possible implementation thereof.

[0050] In a sixth aspect, a computer program product is provided, comprising instructions that, when executed on a computer, cause the computer to perform the method as described in the first aspect and any possible implementation thereof, or in the second aspect and any possible implementation thereof. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of an application scenario provided in an embodiment of this application.

[0052] Figure 2 This is a schematic flowchart of a data transmission method provided in an embodiment of this application.

[0053] Figure 3 This is a schematic diagram of the structure of a broadcast target wake-up time parameter setting field format provided in an embodiment of this application.

[0054] Figure 4 This is a schematic flowchart illustrating another data transmission method provided in the embodiments of this application.

[0055] Figure 5 This is a schematic diagram of the frame structure of restricted target wake-up time service information provided in an embodiment of this application.

[0056] Figure 6 This is a schematic flowchart illustrating another data transmission method provided in an embodiment of this application.

[0057] Figure 7 This is a schematic diagram of the frame structure of another restricted target wake-up time service information provided in the embodiments of this application.

[0058] Figure 8 This is a schematic diagram of the frame structure of another restricted target wake-up time service information provided in an embodiment of this application.

[0059] Figure 9 This is a schematic block diagram of a communication device provided in an embodiment of this application.

[0060] Figure 10 This is a schematic block diagram of another communication device provided in the embodiments of this application. Detailed Implementation

[0061] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0062] The technical solutions provided in this application can be applied to wireless local area network (WLAN) scenarios, such as IEEE 802.11 system standards, such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, or their next generation, such as 802.11be or even later.

[0063] The technical solutions provided in this application can be applied to wireless local area network (WLAN) scenarios, such as IEEE 802.11 system standards, such as 802.11a / b / g, 802.11n, 802.11ac, 802.11ax, or their next generation, such as 802.11be or even later.

[0064] Although the embodiments of this application are primarily illustrated using the deployment of WLAN networks, particularly those employing the IEEE 802.11 system standard, those skilled in the art will readily understand that the various aspects involved in the embodiments of this application can be extended to other networks employing various standards or protocols, such as Bluetooth, high-performance radio local area networks (HIPERLANs), wide area networks (WANs), personal area networks (PANs), or other networks now known or developed in the future. Therefore, regardless of the coverage area and wireless access protocol used, the various aspects provided in the embodiments of this application can be applied to any suitable wireless network. The technical solutions of this application embodiment can also be applied to various communication systems, such as: Global System for Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5th generation (5G) system or new radio (NR) system, future 6th generation (6G) system, Internet of Things (IoT) network or Vehicle to X (V2X) wireless local area network system, etc.

[0065] The communication systems described above that are applicable to this application are merely illustrative examples, and the communication systems applicable to this application are not limited to these. They will be uniformly described here and will not be repeated below.

[0066] In this application, the term "terminal" can refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal can also be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal in a 5G network, terminal in a future 6G network, or terminal in a public land mobile network (PLMN), etc. This application does not limit the scope of the terminal.

[0067] The network device in this application embodiment can be a device for communicating with a terminal. The network device can be a base station (BTS) in a Global System for Mobile Communication (GSM) system or Code Division Multiple Access (CDMA), a base station (nodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved NodeB (eNB or eNodeB) in an LTE system, a radio controller in a cloud radio access network (CRAN) scenario, or a relay station, access point, vehicle-mounted device, wearable device, network device in a 5G network, network device in a future 6G network, or network device in a PLMN network, etc. The embodiments of this application are not limited.

[0068] Figure 1 This is a schematic diagram illustrating one application scenario provided in this application. Figure 1 In this context, the access point (AP) can be a communication server, router, switch, or any of the aforementioned network devices, and the station (STA) can be a mobile phone, computer, or any of the aforementioned terminals. This application does not limit the scope of the embodiments.

[0069] It should be understood that the technical solutions of the embodiments of this application are applicable not only to communication between an AP and one or more STAs, but also to communication between APs and between STAs. For ease of description, the embodiments of this application are only described using communication between an AP and one or more STAs as an example, but this description does not limit the actual application scope of the technical solutions of the embodiments of this application. This is uniformly stated here and will not be repeated later.

[0070] Access points can be points of access for terminals (such as mobile phones) to enter wired (or wireless) networks. They are mainly deployed in homes, buildings, and campuses, with a typical coverage radius of tens to hundreds of meters. They can also be deployed outdoors. An access point acts as a bridge connecting wired and wireless networks, its main function being to connect various wireless network clients together and then connect the wireless network to the Ethernet. Specifically, an access point can be a terminal (such as a mobile phone) or network device (such as a router) with a Wi-Fi chip. Access points can be devices supporting the 802.11be standard. Access points can also be devices supporting various WLAN standards of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, 802.11a, and 802.11be next generation. The access point in this application can be a HE AP or EHT AP, or it can be an access point applicable to a future generation of Wi-Fi standards.

[0071] The site can be a wireless communication chip, wireless sensor, or wireless communication terminal, and can also be referred to as a user. For example, the site can be a mobile phone supporting Wi-Fi communication, a tablet supporting Wi-Fi communication, a set-top box supporting Wi-Fi communication, a smart TV supporting Wi-Fi communication, a smart wearable device supporting Wi-Fi communication, an in-vehicle communication device supporting Wi-Fi communication, and a computer supporting Wi-Fi communication, etc. Optionally, the site can support the 802.11be standard. The site can also support WLAN standards of the 802.11 family, such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, 802.11a, and 802.11be next generation.

[0072] For example, access points and sites can be devices used in the Internet of Vehicles (IoV), IoT nodes and sensors in the Internet of Things (IoT), smart cameras, smart remote controls, smart water and electricity meters in smart homes, and sensors in smart cities.

[0073] It should be understood that the technical solutions of the embodiments of this application are applicable not only to communication between an AP and one or more STAs, but also to communication between APs and between STAs. For ease of description, the embodiments of this application are only described using communication between an AP and one or more STAs as an example, but this description does not limit the actual application scope of the technical solutions of the embodiments of this application. This is uniformly stated here and will not be repeated later.

[0074] The wireless communication system provided in this application can be a WLAN or a cellular network. The method can be implemented by a communication device in the wireless communication system or a chip or processor in the communication device. The communication device can be a wireless communication device that supports parallel transmission across multiple links, for example, called a multi-link device or a multi-band device. Compared to devices that only support single-link transmission, multi-link devices have higher transmission efficiency and higher throughput. A multi-link device includes one or more affiliated STAs. An affiliated STA is a logical site that can operate on a single link. The affiliated site can be an AP or a non-AP STA. For ease of description, this application refers to a multi-link device with an affiliated AP as a multi-link AP or a multi-link AP device or an AP multi-link device, and a multi-link device with an affiliated non-AP STA as a multi-link STA or a multi-link STA device or a STA multi-link device.

[0075] To better understand the technical solutions disclosed in the embodiments of this application, some terms involved in the embodiments of this application will be briefly described below.

[0076] First, target wake time (TWT).

[0077] TWT is a power-saving technology defined in Wi-Fi 6. TWT achieves power saving by setting periodic time periods during which certain devices only need to remain active and can go into sleep mode at other times.

[0078] TWT is divided into unicast TWT (individual TWT) and broadcast TWT (broadcast TWT). In unicast TWT, each STA can establish a TWT protocol with the AP independently. Therefore, each STA can have its own active time period and sleep time period. In broadcast TWT, the AP can establish a common TWT protocol for a group of STAs. Multiple STAs work during the same active time period and sleep during other time periods.

[0079] Specifically, unicast TWT refers to a TWT requesting STA sending a TWT request message to a TWT responding STA, requesting to set a wake-up time. Upon receiving the TWT request message, the responding STA sends a TWT response message to the requesting STA. After successful interaction, a TWT protocol is established between the requesting and responding STAs. Once the TWT protocol is established, both the requesting and responding STAs should remain active for the agreed-upon time period to send and receive data. Outside of this time period, the STAs can hibernate to save energy.

[0080] Generally speaking, STA is the requesting station and AP is the responding station. AP can also initiate a TWT protocol establishment request to STA.

[0081] Unlike unicast TWTs, broadcast TWTs provide a "batch management" mechanism, allowing the AP to establish a series of periodically occurring TWT service phases with multiple STAs. During a TWT service phase, these multiple STAs need to remain active to communicate with the AP.

[0082] An Access Point (AP) can carry information about one or more broadcast TWTs in a beacon frame. Each broadcast TWT is represented by a broadcast TWT identifier and the AP's media access control (MAC) address. Upon receiving a beacon frame, a Station (STA) can send a broadcast TWT establishment request message to the AP if it wishes to join the broadcast TWT. During broadcast TWT establishment, the STA needs to specify a broadcast TWT identifier to request joining a specific broadcast TWT. After joining the broadcast TWT, the STA can wake up according to the TWT service phase indicated by the TWT parameter set to communicate with the AP. It should be noted that if a STA supports broadcast TWTs but does not explicitly join a specific broadcast TWT ID, it will default to participating in the broadcast TWT with broadcast TWT ID = 0.

[0083] Similar to unicast TWTs, broadcast TWTs also specify the period at which the TWT service phase occurs and the duration of each TWT service phase. In addition, broadcast TWT parameters include the broadcast TWT lifetime, which is expressed in beacon frame intervals and represents the duration of the established broadcast TWT.

[0084] Building upon the existing TWT mechanism, the 802.11be protocol defines a new broadcast TWT for low-latency service transmission, called restricted TWT (r-TWT). Specifically, an access point (AP) indicates that a broadcast TWT is an r-TWT by setting the broadcast TWT recommendation field to 4. Previous extreme high throughput stations (Pre-EHT STAs) or legacy STAs do not recognize this value (4), so they will not attempt to join the broadcast TWT but will remain silent during the r-TWT period and will not initiate channel access.

[0085] Second, traffic identifier (TID).

[0086] The TID (Title Identifier) ​​is used to indicate the priority of the service provided by the STA (Station). It is 4 bits long and has 16 possible values ​​from 0 to 15. In enhanced distribution channel access (EDCA) scenarios, the TID ranges from 0 to 7, corresponding one-to-one with the STA's user priority (UP). The remaining values ​​from 8 to 15 are reserved. The UP value is associated with the Media Access Control (MAC) Service Data Unit (MSDU) and indicates the priority order for processing the MSDU.

[0087] Third, access category (AC).

[0088] The 802.11 series of protocols defines four access categories, each with different parameters such as arbitrary frame interval, transmission time limit, and contention window size. These directly determine the priority of the STA when accessing the channel. Please refer to Table 1 for details.

[0089] Table 1: Parameters corresponding to each access category.

[0090]

[0091]

[0092] Fourth, the access category index (ACI).

[0093] ACI is used to indicate the referenced AC and all its corresponding parameters. The mapping relationship between ACI and AC can be seen in Table 2.

[0094] Table 2: Mapping relationship between ACI and AC

[0095] 0 AC_BE Best effort 1 AC_BK Background 2 AC_VI Video 3 AC_VO Voice

[0096] Fifth, the mapping relationship between UP and AC.

[0097] It should be understood that the mapping relationship between UP and AC is shown in Table 3. Specifically, eight UPs are mapped to four types of ACs, with each AC supporting two UPs.

[0098] Table 3: Mapping relationship between UP and AC

[0099]

[0100] It should be understood that the TID of a STA's low-latency service is determined through individual negotiation between the STA and its associated AP. This may result in multiple different TIDs being configured for the same type of low-latency service. For example, the TID for low-latency service #A on STA#1 is 1, the TID for low-latency service #A on STA#2 is 7, and the TID for low-latency service #A on STA#3 is 4. Low-latency service #A is a service that requires very low-latency transmission. Because the TID of a STA's low-latency service is one-to-one with the UP (Uploader), the UPs for these services can only be mapped to the corresponding AC using the default method (see Table 3). Therefore, the AC corresponding to a STA's low-latency service is entirely determined by the assigned TID. In the current r-TWT mechanism, if the AC corresponding to the low-latency service of a STA is configured according to the mapping relationship indicated in Table 3, it may cause some STAs' low-latency services to be assigned to ACs with lower priority when using the EDCA access channel. For example, the TID of low-latency service #A of STA#1 is 1, and the access class corresponding to low-latency service #A of STA#1 is AC_BK, so it cannot complete the transmission within its latency requirements, which ultimately reduces the transmission performance of the low-latency service of r-TWT.

[0101] In view of the above-mentioned technical problems, the embodiments of this application provide a data transmission method. By flexibly configuring the AC corresponding to the low-latency service of the STA, the embodiments of this application can better meet the low-latency transmission requirements of the low-latency service of the STA in the r-TWT mechanism.

[0102] The following will combine Figure 2 The data transmission method provided in the embodiments of this application will be described.

[0103] Figure 2 This is a schematic flowchart illustrating a data transmission method provided in an embodiment of this application. The method includes:

[0104] S210, The site sends a restricted target wake-up time establishment request message;

[0105] Correspondingly, the access point receives restricted target wake-up time establishment request information sent by the site.

[0106] S220, the access point sends a restricted target wake-up time response message to the site;

[0107] Accordingly, the site will receive restricted target wake-up time response information sent by the access point.

[0108] In the above embodiments, the restricted target wake-up time establishment request information or the restricted target wake-up time response information includes the indication information of the first access category corresponding to the low latency service of the site.

[0109] In this embodiment of the application, low-latency service refers to a service with high latency requirements. Generally, low-latency service requires the service transmission latency to be within 10ms.

[0110] It should be understood that the Restricted Target Wake-up Time (RDWT) establishment request message (hereinafter referred to as the "establishment request message") sent by the site to the access point is used to request the establishment of the RWT protocol, and the RWT response message (hereinafter referred to as the "response message") sent by the access point to the site is used to respond to the establishment request message. The specific response content will be described below.

[0111] It should be understood that the indication information of the first AC included in the establishment request information or response information may be an ACI, a bitmap, or other implicit form to indicate the first AC corresponding to the low latency service.

[0112] In this embodiment, the setup request information can be a TWT request frame, or other information, such as a TWT setup frame, a TWT negotiation frame, a TWT initiating frame, or a TWT setuprequest frame. The response information can be a TWT response frame, or other information, such as a TWT setup response frame, a TWT setup frame, or a TWT negotiation frame.

[0113] Figure 3 This is a schematic diagram of the structure of a broadcast target wake-up time parameter setting field format provided in an embodiment of this application.

[0114] The broadcast TWT parameter set fieldformat includes the following bytes: request type, target wake-up time (TWT), noiminal minimum TWT wake duration, TWT internal mantissa, broadcast TWT information, and restricted TWT traffic information. Specifically, the request type occupies two bytes, TWT occupies two bytes, noiminal minimum TWT wake duration occupies one byte, TWT internal mantissa occupies two bytes, broadcast TWT information occupies two bytes, and restricted TWT traffic information occupies three or more bytes. Each byte is 8 bits.

[0115] It should be noted that the restricted target wake-up time establishment request information and the restricted target wake-up time response information in the embodiments of this application both include Figure 3 The format of the broadcast target wake-up time parameter setting field, or its possible variations, will be described later.

[0116] For ease of description, this application uses the example of a TWT request frame for establishing request information and a TWT response frame for establishing response information. However, this description does not limit the scope of protection of this application.

[0117] The following will combine Figures 4 to 7 right Figure 2 The technical solution shown will be described in further detail.

[0118] Figure 4 and Figure 5 This describes an embodiment where the request information includes an instruction from the first AC. Figure 6 and Figure 7 This describes an embodiment where the response information includes indication information from the first AC.

[0119] Figure 4 This is yet another data transmission method provided in this application embodiment. The method includes:

[0120] S410, STA sends a TWT request frame to AP, which includes indication information of the first AC;

[0121] Accordingly, the AP receives the TWT request frame sent by the STA.

[0122] S420, AP sends TWT response frame to STA.

[0123] Accordingly, the STA receives the TWT response frame sent by the AP.

[0124] It should be understood that the STA sends a TWT request frame to the AP, which includes indication information of the first AC. This means that the STA initiates a TWT request frame to the AP to establish the r-TWT protocol, and in this TWT request frame, requests that the AC corresponding to the STA's low-latency service be mapped to the first AC. In this way, there is an opportunity to complete the transmission of the STA's low-latency service through the first AC determined by the STA.

[0125] It should be understood that the TWT request frame sent by the STA to the AP also includes the TID information of the STA's low-latency service. As mentioned above, there is a correspondence between TID and UP, and Table 3 provides the correspondence between UP and AC. Thus, this TID information configures an AC for the STA's low-latency service. For ease of description, the AC corresponding to this TID is called the "default AC". For specific configuration methods, please refer to Table 3.

[0126] It should be understood that the first AC indicated by the indication information of the first AC in the TWT request frame sent by the STA to the AP is different from the default AC corresponding to the low-latency service specified in Table 3. It is a new AC that can meet the transmission requirements of the low-latency service. For example, the TID of the STA's low-latency service is 1, and the AC corresponding to this TID is AC_BK. However, since this low-latency service is a service that highly requires low-latency transmission, it requires the configuration of an AC_VO to meet the transmission requirements of the low-latency service. Therefore, the TWT request frame sent by the STA to the AP can carry the indication information of this AC_VO to request the AP to replace the AC_BK originally corresponding to the STA's low-latency service with AC_VO.

[0127] It should be understood that the indication information of the first AC included in the TWT request frame sent by the STA to the AP is determined by the STA based on its own low-latency service transmission needs. When the STA determines that the default AC corresponding to its low-latency service cannot meet the low-latency transmission requirement, it sends a TWT request frame including the indication information of the first AC to the AP. This TWT request frame is used to request that the default AC corresponding to the STA's low-latency service be mapped to the first AC. This allows the STA to flexibly allocate a suitable AC to the low-latency service request. In this way, the embodiments of this application can get rid of the limitations of configuring the AC corresponding to the low-latency service according to Table 3.

[0128] As another example, S410#A: The STA determines that a first AC needs to be allocated for the low-latency service. The STA can carry the indication information of the first AC in the TWT request frame, so that the AP knows that the STA needs to change the AC corresponding to the STA's low-latency service.

[0129] S420#A: The AP makes judgments and decisions based on the received information. The AP sends the judgment and decision results to the STA via a response message;

[0130] S430#A: The STA will take the corresponding action based on this response information.

[0131] In S430#A above, the STA's actions based on the response information may include: if the AP agrees to the STA's request to change the AC corresponding to the low-latency service, the STA performs subsequent communication according to the indicated first AC; or, if the AP rejects the STA's request to change the AC corresponding to the low-latency service, the STA performs subsequent communication according to the default AC corresponding to the TID of the low-latency service. This flexibly meets the low-latency transmission requirements of the low-latency service. The communication may refer to uplink or downlink communication, and may also include channel access.

[0132] By having the site carry the indication information of the first AC in the establishment request information, the embodiments of this application can give the site the right to independently judge and choose whether to change the AC corresponding to the low latency service. This allows for more flexible allocation of suitable ACs to low latency services. Furthermore, this can effectively alleviate the problem that the default AC of some low latency services cannot meet their low latency requirements due to the default mapping relationship of the UP to the AC, and better ensure that the transmission requirements of the site's low latency services are met in the r-TWT mechanism.

[0133] In one example of S320, S410, and S420#A, the TWT response frame sent by the AP to the STA includes indication information #A. This indication information #A includes two values: a first value and a second value. For example, the first value indicates that the AP agrees to the STA's request to change the AC corresponding to the low-latency service, and the second value indicates that the AP rejects the STA's request to change the AC corresponding to the low-latency service, or vice versa. The first and second values ​​of the indication information #A can occupy one bit, for example, the first value is 1 and the second value is 0, or the first value is 0 and the second value is 1; or the first and second values ​​of the indication information #A can occupy multiple bits, for example, two bits. For example, the first value is 11 and the second value is 00, or the first value is 10 and the second value is 00, etc. This application embodiment does not specifically limit this.

[0134] As a possible implementation, the second value of the indication information #A can be used not only to indicate that the AP rejects the STA's request to change the AC corresponding to the low latency service, but also to indicate that the TWT response frame includes the indication information of the second AC corresponding to the STA's low latency service.

[0135] In specific examples, S320, S420, or S420#A includes: the AP can send the indication information of the second AC to the STA via a TWT response frame. Correspondingly, the actions taken by the STA based on the response information in S430#A may include: the STA determining the second AC corresponding to its low-latency service based on the indication information of the second AC, so as to use the second AC for subsequent communication. For example, access is performed according to the channel corresponding to the second AC, thereby meeting the low-latency transmission requirements of the STA's low-latency service.

[0136] It should be understood that the AP can send the indication information of the second AC to the STA through the TWT response frame, which may be based on the AP's belief that the first AC requested by the STA is unavailable, or on the AP's belief that the second AC is more suitable or better than the first AC.

[0137] In another example of S320, S420, or S420#A, the TWT response frame sent by the AP to the STA includes indication information #A, which includes three values: a first value, a second value, and a third value. For example, the first value indicates that the AP agrees to the STA's request to change the AC corresponding to the low-latency service; the second value indicates that the AP rejects the STA's request to change the AC corresponding to the low-latency service; and the third value indicates that the TWT response frame includes indication information for a third AC corresponding to the STA's low-latency service.

[0138] The access point can indicate to the AP that it agrees to or rejects the STA's request to change the AC corresponding to the low-latency service by using the first or second value of the indication information #A. Alternatively, it can use a third value to indicate that the TWT response frame includes indication information of the third AC corresponding to the STA's low-latency service. The AP sends the indication information of the third AC to the STA through the TWT response frame. Based on this indication information, the STA determines the third AC corresponding to its low-latency service and selects the appropriate channel for access, thereby satisfying the low-latency transmission requirements of the STA's low-latency service.

[0139] In this embodiment, the access point judges the indication information of the first AC included in the establishment request information sent by the site, and determines whether to agree to or reject the first AC. Thus, this embodiment provides the site with the right to independently judge and select the first AC corresponding to its low-latency services. Furthermore, it allows for more flexible allocation of suitable ACs to low-latency services, better ensuring that the transmission requirements of low-latency services are met. Through this method, this embodiment can overcome the limitations of configuring ACs corresponding to low-latency services according to Table 3.

[0140] In another example of S310, S410, or S410#A, the TWT request frame sent by the STA to the AP includes indication information #B. This indication information #B has two values: a first value and a second value. The first value indicates that the TWT request frame includes indication information of the first AC, and the second value indicates that the TWT request frame does not include indication information of the first AC.

[0141] Specifically, the instruction information #B precedes the instruction information of the first AC. In terms of read / write order, the AP will read instruction information #B first. If it is determined that instruction information #B indicates that the TWT request frame includes the instruction information of the first AC, the AP will continue reading the instruction information of the first AC included in the TWT request frame. If it is determined that instruction information #B indicates that the TWT request frame does not include the instruction information of the first AC, the AP will not continue reading the instruction information of the first AC included in the TWT request frame. When the second value indicates that the TWT request frame does not include the instruction information of the first AC, the TWT request frame can still include the instruction information of the first AC, but the instruction information of the first AC is invalid.

[0142] Optionally, the indication information #B can be used to indicate whether the indication information of the first AC included in the TWT request frame is valid or invalid.

[0143] Specifically, the first value of the indication information #B is used to indicate that the indication information of the first AC included in the TWT request frame is valid, and the second value of the indication information #B is used to indicate that the indication information of the first AC included in the TWT request frame is invalid.

[0144] This application embodiment uses indication information to indicate whether the establishment request information sent by the site to the access point includes indication information of the first AC or whether the indication information of the first AC included in the establishment request information is valid. In this way, it can better help the access point determine whether the site requests to change the AC corresponding to the low latency service.

[0145] It should be noted that the TWT request frame sent by the STA to the AP may only include indication information of the first AC, or it may include indication information of the first AC and indication information #B, where indication information #B is a first value. In this case, the TWT response frame sent by the AP to the STA includes indication information #A, which indicates the AP's opinion on the STA's request to change the AC corresponding to the low-latency service. If the AP rejects the STA's request to change the AC corresponding to the low-latency service but recommends a new AC, the TWT response frame will also include indication information of the new AC, such as indication information of the second AC or the third AC.

[0146] The following will combine Figure 5 right Figure 4 The technical solution shown will be described in further detail. Figure 4 This is a schematic diagram of the frame structure of restricted target wake-up time service information provided in an embodiment of this application.

[0147] It should be understood that Figure 5 (a) shows the restricted target wake-up time service information carried in a TWT request frame. Figure 5 (b) shows the restricted target wake-up time service information carried in the TWT response frame.

[0148] exist Figure 5 In (a), the restricted target wake-up time traffic information includes the traffic information control field, the restricted TWT DL TID bitmap, the restricted TWT UL TID bitmap, and the access category field.

[0149] Specifically, this service information control field includes valid values ​​for the downlink service identifier bitmap (DL TID bitmap valid) and uplink service identifier bitmap (UL TID bitmap valid) (see existing protocol standard 802.11be 9.4.2.199 TWT element for details). The valid value for the downlink service identifier bitmap (DLTID bitmap valid) indicates whether the downlink service identifier bitmap is valid. The valid value for the uplink service identifier bitmap (UL TID bitmap valid) indicates whether the uplink service identifier bitmap is valid.

[0150] It should be understood that the restricted TWT DL TID bitmap and restricted TWT UL TID bitmap mentioned above carry TID information about the low-latency services corresponding to this STA.

[0151] Optionally, the business information control field may also include indication information, which is used to carry the aforementioned indication information #B.

[0152] It should be understood that the indication information used to carry the aforementioned indication information #B can occupy one or more bits from B2 to B7, where B2 indicates the third bit and B7 indicates the eighth bit. For example, when occupying one bit, 1 indicates that the TWT request frame includes the indication information of the first AC, and 0 indicates that the TWT request frame does not include the indication information of the first AC, but the TWT request frame can still retain the indication information of the first AC. The Access Category field is used to carry the indication information of the first AC. Among them, B0 and B1 are used to carry the DL TID bitmap valid and ULTID bitmap valid, respectively, and valid occupies only one bit.

[0153] It should be noted that, in Figure 5 In the technical solution shown, since the AC indication information is carried in the aforementioned access category field, when the indication information included in the service information control field is used to indicate whether the AC indication information is included, this meaning is equivalent to indicating whether the access category field is included (if the access category field is always included, it can be equivalent to indicating whether the access category field includes valid information). This is explained uniformly here and will not be repeated later.

[0154] exist Figure 5In (b), the restricted target wake-up time service information includes a service information control field, a restricted downlink service identifier bitmap, and a restricted uplink service identifier bitmap. The service information control field includes valid values ​​for the downlink service identifier bitmap, valid values ​​for the uplink service identifier bitmap, and indication information. This indication information is used to carry the aforementioned indication information #A.

[0155] It should be understood that the indication information used to carry the aforementioned indication information #A can occupy one or more bits from B2 to B7, where B2 indicates the third bit and B7 indicates the eighth bit. For example, when occupying one bit, 1 indicates that the AP agrees to the STA's request to change the AC corresponding to the low-latency service, 0 indicates that the AP disagrees with the STA's request to change the AC corresponding to the low-latency service, or vice versa. As another example, when occupying two bits, 11 indicates that the AP agrees to the STA's request to change the AC corresponding to the low-latency service, 00 indicates that the AP rejects the STA's request to change the AC corresponding to the low-latency service, and 10 indicates that the TWT response frame includes indication information for the second AC, or vice versa. B0 and B1 are used to carry DL TID bitmap valid and UL TID bitmap valid, respectively, with valid occupying only one bit.

[0156] It should be understood that when the AP sends a TWT response frame to the STA carrying the indication information of the second AC, the indication information of the second AC can be carried in the newly added field of the restricted TWT traffic information of the TWT response frame—the access category field. In other words, the frame structure of the restricted TWT traffic information of the TWT response frame can be the same as the frame structure of the restricted TWT traffic information of the TWT request frame.

[0157] It should be understood that the restricted TWT DL TID bitmap and restricted TWT UL TID bitmap mentioned above carry the TID information corresponding to the downlink low-latency service and the TID information corresponding to the uplink low-latency service of the STA, respectively.

[0158] It should be understood that the restricted TWT traffic information mentioned above belongs to the target wake-up time element information, which is part of the information in the TWT response frame or TWT request frame. This target wake-up time element information can be a TWT element or other information, such as a TWT information element, r-TWT element (or r-TWT information element), or r-TWT SPs (service periods, SPs) element.

[0159] It should be noted that, in one example, if the AP rejects the STA's request to change the AC corresponding to the low-latency service and does not recommend the new AC, the restricted TWT traffic information of the TWT response frame may not include the access category field. If the restricted TWT traffic information of the TWT response frame includes an access category field, and this field is not used to instruct the STA to access the AC as indicated by the instruction information, then one or more bits from the instruction information can be used in the service information control field of the restricted TWT traffic information of the TWT response frame to indicate that the access category field is invalid. The specific form can be referred to the aforementioned instruction information #A or instruction information #B. In this case, the access category field can be used to indicate other information, which will not be elaborated upon in this application.

[0160] Figure 6 This is another data transmission method provided in the embodiments of this application. The method includes:

[0161] S610, STA sends a TWT request frame to AP;

[0162] Accordingly, the AP receives the TWT request frame sent by the STA.

[0163] S620, the AP sends a TWT response frame to the STA, which includes indication information for the first AC.

[0164] Accordingly, the STA receives the TWT response frame sent by the AP.

[0165] It should be understood that when the TWT request frame sent by the STA to the AP does not include the indication information of the first AC, it indicates that the STA has not requested to change the mapping relationship between the STA's low-latency service and the AC, but the TWT response frame sent by the AP to the STA includes the indication information of the first AC.

[0166] Specifically, the AP can autonomously decide whether to assign a new AC to the STA's low-latency service, which is different from the AC corresponding to the STA's default TID. The AP can determine whether to instruct the service to use a different AC based on the characteristics of the STA's low-latency service (e.g., intra-basic service set latency, jitter variance, packet loss, data rate). For example, the AP can learn about the characteristics of some of the STA's low-latency services in advance through the quality of service characteristics element sent by the STA. When the AP decides to assign a first AC to the STA's low-latency service, it carries the indication information of the first AC in the TWT response frame. The STA performs the corresponding action based on the indication information of the first AC in the TWT response frame.

[0167] By allowing the access point to autonomously decide whether to allocate a new AC for the low-latency services of the site, the embodiments of this application can empower the access point with the right to make autonomous judgments, thereby enabling more flexible allocation of suitable ACs for low-latency services. Furthermore, this can effectively alleviate the problem that the default ACs of some low-latency services cannot meet their low-latency requirements due to the default mapping relationship of UP to ACs, and better ensure that the transmission requirements of the low-latency services of the site in the r-TWT mechanism are met.

[0168] In one or more of the above embodiments, by flexibly configuring a new AC for low-latency services by the site or access point, on the one hand, the embodiments of this application are freed from the constraints of configuring the AC corresponding to the low-latency service according to Table 3, thus possessing flexibility; on the other hand, the embodiments of this application can give the site or access point autonomy and choice when configuring the AC for low-latency services. Therefore, based on the above technical solution, the embodiments of this application can flexibly configure the AC corresponding to the low-latency service of the STA. In general examples, the level of the new AC is higher than the level of the AC corresponding to the default TID of the low-latency service. In this way, the low-latency transmission requirements of the low-latency service of the STA in the r-TWT mechanism can be better met.

[0169] As an example, in one of S220 and S520, the TWT response frame sent by the AP to the STA includes indication information #C. This indication information #C has two values: a first value and a second value. The first value indicates that the TWT response frame includes the indication information field of the first AC, and the second value indicates that the TWT response frame does not include the indication information field of the first AC.

[0170] Specifically, the indication information #C precedes the indication information of the first AC. In terms of read / write order, the STA will read the indication information #C first. If the STA determines that the indication information #C indicates that the TWT response frame includes the indication information field of the first AC, the STA will continue reading the indication information of the first AC included in the TWT response frame. If the STA determines that the indication information #C indicates that the TWT response frame does not include the indication information field of the first AC, the STA will not continue reading the indication information of the first AC included in the TWT response frame. When the second value indicates that the TWT response frame includes the indication information field of the first AC, the TWT response frame may still include the indication information field of the first AC.

[0171] Optionally, the indication information #C can be used to indicate whether the indication information of the first AC included in the TWT response frame is valid or invalid.

[0172] Specifically, the first value of the indication information #C is used to indicate that the indication information of the first AC included in the TWT response frame is valid, and the second value of the indication information #C is used to indicate that the indication information of the first AC included in the TWT response frame is invalid.

[0173] This application embodiment uses indication information to indicate whether the response information sent by the access point to the site includes the indication information of the first AC or whether the indication information of the first AC included in the response information is valid. In this way, it can better help the site determine whether the access point has changed the AC corresponding to the site's low-latency service, thereby saving communication resources or improving communication processing speed.

[0174] The following will combine Figure 7 right Figure 6 The technical solution shown will be described in further detail. Figure 6 This is a schematic diagram of another restricted target wake-up time service information frame structure provided in the embodiments of this application.

[0175] It should be understood that Figure 7(a) shows the restricted target wake-up time service information carried in a TWT response frame. Figure 7 (b) shows the restricted target wake-up time service information carried in the TWT request frame.

[0176] exist Figure 7 In (a), the restricted target wake-up time service information includes the service information control field, the restricted downlink service identifier bit map, the restricted uplink service identifier bit map, and the access category field.

[0177] Specifically, the service information control field includes valid values ​​for the downlink service identifier bitmap and the uplink service identifier bitmap. The valid values ​​for the downlink service identifier bitmap indicate whether the downlink service identifier bitmap is valid. The valid values ​​for the uplink service identifier bitmap indicate whether the uplink service identifier bitmap is valid.

[0178] It should be understood that the restricted TWT DL TID bitmap and restricted TWT UL TID bitmap mentioned above carry TID information about the low-latency services corresponding to this STA.

[0179] Optionally, the business information control field may also include indication information, which is used to carry the aforementioned indication information #C.

[0180] It should be understood that the indication information used to carry the aforementioned indication information #C can occupy one or more bits from B2 to B7, where B2 indicates the third bit and B7 indicates the eighth bit. For example, when occupying one bit, 1 indicates that the TWT response frame includes the indication information field of the first AC, and 0 indicates that the TWT response frame does not include the indication information field of the first AC, but the TWT response frame can still retain the indication information field of the first AC. The access category field is used to carry the indication information of the first AC. Among them, B0 and B1 are used to carry DL TID bitmap valid and UL TID bitmap valid, respectively, and valid occupies only one bit.

[0181] exist Figure 7 In (b), the restricted target wake-up time service information includes a service information control field, a restricted downlink service identifier bitmap, and a restricted uplink service identifier bitmap. The service information control field includes valid values ​​for the downlink service identifier bitmap and the uplink service identifier bitmap.

[0182] It should be understood that the restricted TWT DL TID bitmap and restricted TWT UL TID bitmap mentioned above carry the TID information corresponding to the downlink low-latency service and the TID information corresponding to the uplink low-latency service of the STA, respectively.

[0183] It should be understood that the restricted TWT traffic information mentioned above belongs to the target wake-up time element information, which is part of the information in the TWT response frame or TWT request frame. This target wake-up time element information can be a TWT element or other information, such as a TWT information element, r-TWT element (or r-TWT information element), or r-TWT SPs (service periods, SPs) element.

[0184] It should be understood that Figure 5 and Figure 7 The access category field in the restricted target wake-up time service information shown includes 8 bits, and the service information control field also includes 8 bits. Of course, it may also include more bits, and this embodiment does not limit this. The 8 bits of the access category field can simultaneously indicate the indication information of the new AC corresponding to the downlink low-latency service and the indication information of the new AC corresponding to the uplink low-latency service. Furthermore, when the service information control field includes indication information, this indication information can occupy one or more bits from B2 to B7 to individually indicate whether the indication information of the AC is included in the access category field, or multiple bits can be used to separately indicate whether the indication information of the new AC corresponding to the downlink low-latency service or the new AC corresponding to the uplink low-latency service is included in the access category field.

[0185] It should be understood that when a STA requests an AP to change the AC corresponding to a low-latency service, the STA can carry the access category field in the restricted TWT traffic information in the TWT request frame. This access category field is used to carry the AC indication information.

[0186] Optionally, the STA may also carry indication information in the indication information (if included) of the service information control field of the restricted TWT traffic information in the TWT request frame, indicating whether the access category field is included or whether the included access category field is valid.

[0187] As one possible implementation, the restrictedTWT traffic information in the TWT request frame sent by the STA to the AP can always carry the access category field. When no request is made to change the AC corresponding to the low-latency service, the AP can be informed that the STA has not requested to change the AC corresponding to the low-latency service by carrying an indication message in the service information control field of the restrictedTWT traffic information in the TWT request frame (if the indication message is included) indicating that the access category field included in the TWT request frame is invalid.

[0188] It should be understood that when an AP wants to change the AC corresponding to a STA's low-latency service, the AP can carry the access category field in the restricted TWT traffic information of the TWT response frame. This access category field is used to carry the AC indication information.

[0189] Optionally, the AP may also carry indication information in the indication information (if included) of the restricted TWT trafficinformation service information control field of the TWT response frame, indicating whether the TWT response frame includes an access category field or whether the access category field included in the TWT response frame is valid.

[0190] As one possible implementation, the restrictedTWT traffic information of the TWT response frame sent by the AP to the STA can always carry the access category field. When not indicating a change in the AC corresponding to the low-latency service, the STA can be informed that the AP has not indicated a change in the AC corresponding to the low-latency service by carrying indication information (if including indication information) in the indication information control field of the service information of the restrictedTWT traffic information of the TWT response frame.

[0191] As an example, both the TWT request frame sent by the STA to the AP and the TWT response frame sent by the AP to the STA include AC indication information. The STA needs to take corresponding actions based on whether the AC indicated by the AC indication information sent by the AP is the same as the AC requested by the STA itself.

[0192] For example, the TWT request frame sent by the STA to the AP includes indication information of the first AC, and the TWT response frame sent by the AP to the STA includes indication information of the fourth AC. The fourth AC indicated by the indication information of the fourth AC is different from the first AC indicated by the indication information of the first AC. The STA then accesses the network according to the channel indicated by the first AC. If the fourth AC indicated by the indication information of the fourth AC is the same as the first AC indicated by the indication information of the first AC, the STA can access the network according to the channel indicated by the first AC.

[0193] As a possible implementation, when both the TWT request frame and the TWT response frame include indication information indicating whether an AC is included or whether the indication information of the included AC is valid, the STA also has corresponding actions.

[0194] For example, the TWT response frame includes indication information of the fourth AC and indication information #D. Indication information #D indicates that the indication information of the fourth AC is valid. When the STA requests to change the AC corresponding to the low-latency service, if the STA requests the first AC, which is the same as the fourth AC, it means that the AP agrees to the STA's request to change the AC corresponding to the low-latency service. If the STA requests the first AC, which is different from the fourth AC, it means that the AP rejects the STA's request to change the AC corresponding to the low-latency service and recommends that the STA access the channel according to the fourth AC.

[0195] For example, the TWT response frame includes indication information for the fourth AC and indication information #D. Indication information #D indicates that the indication information for the fourth AC is invalid. When the STA requests to change the AC corresponding to the low-latency service, if the STA requests the first AC, which is the same as the fourth AC, then the AP rejects the STA's request to change the AC corresponding to the low-latency service; if the STA requests the first AC, which is different from the fourth AC, then the AP rejects the STA's request to change the AC corresponding to the low-latency service and does not recommend a new AC.

[0196] As another possible implementation, either the TWT request frame or the TWT response frame may include indication information for indicating whether an AC is included or indication information for indicating whether the included AC is valid. If the other does not include the indication information for indicating whether an AC is included or indication information for indicating whether the included AC is valid, the specific implementation can be referred to the aforementioned content regarding indication information #C or indication information #B, and will not be repeated here.

[0197] The following will combine Figure 8 The above technical solution will be described in further detail.

[0198] Figure 8 This is a schematic diagram of another restricted target wake-up time service information provided in an embodiment of this application. Specifically, as shown below... Figure 8 As shown.

[0199] It should be understood that Figure 8 The restricted target wake-up time service information shown belongs to the TWT response frame. This restricted target wake-up time service information includes a service information control field, a restricted downlink service identifier bitmap, a restricted uplink service identifier bitmap, and an access category field.

[0200] Specifically, the service information control field includes valid values ​​for the downlink service identifier bitmap, valid values ​​for the uplink service identifier bitmap, and valid values ​​for the access category index. The access category field includes downlink service access category index values ​​and uplink service access category index values. A downlink service access category index value indicates that a new AC has been configured for the STA's downlink low-latency service, and an uplink service access category index value indicates that a new AC has been configured for the STA's uplink low-latency service. If the two index values ​​do not occupy all the bits in this access category field, the remaining bits are reserved.

[0201] Furthermore, the AP indicates whether to request a change to the AC corresponding to the low-latency service by using a valid value of the Access Category Index in the Service Information Control field of the restricted TWT trafficinformation in the TWT responseframe.

[0202] It should be understood that the valid value of this access category index can indicate whether to change the AC corresponding to the low-latency service or not to change the AC corresponding to the low-latency service.

[0203] It should be noted that when the valid value of the access category index value in the service information control field indicates the change of the AC corresponding to the low latency service, the change can be for the downlink low latency service, the uplink low latency service, or both the uplink low latency service and the downlink low latency service. This application embodiment does not make specific limitations on this.

[0204] As an example, this application embodiment can set two valid access category index values, respectively indicating whether the downlink service access category index value and the uplink service access category index value are valid.

[0205] It should be noted that, based on Figure 8 The description of the above technical solutions is merely an example and a simple description, and is not a complete description of the above technical solutions.

[0206] As one possible implementation, the access category field is a bitmap. By carrying the new AC corresponding to the downlink low-latency service and the new AC corresponding to the uplink low-latency service in this bitmap, the AP can also instruct the STA to change the AC corresponding to the low-latency service.

[0207] It should be understood that the above description can also be applied to the TWT response frame sent by the access point to the site. The scheme is basically similar and will not be repeated here.

[0208] It should be understood that when the indication information of the AC is indicated by a bit map, the bit map may be similar to the aforementioned restricted uplink service identifier bit map or restricted downlink service identifier bit map, but the content indicated may be different, because the bit map carries the indication content of the new AC for the site or access point to configure the site's low latency service.

[0209] It should be understood that when the indication information of the first AC is indicated by the bit map in the embodiments of this application, the bit map can be divided into uplink and downlink AC bit maps. Each bit of the uplink AC bit map corresponds to an AC. Setting the bit corresponding to a certain AC to 1 indicates the AC used by the uplink low-latency service, setting it to 0 indicates that the AC is not used, and vice versa. The downlink AC bit map is similar.

[0210] It should be noted that the low-latency service of the STA can be either an uplink service or a downlink service. The establishment request information sent by the STA to the AP can indicate only uplink or downlink services, or it can indicate both uplink and downlink services simultaneously. In this case, the indication information of the first AC included in the establishment request information or response information needs to correspond to the aforementioned indication of only uplink or downlink services, or it can indicate both uplink and downlink services simultaneously.

[0211] For example, if the setup request information sent by the STA to the AP indicates an uplink service or a downlink service, the indication information of the first AC of the station included in the setup request information or the response information must correspond to either the uplink service or the downlink service. For instance, if the setup request information sent by the STA to the AP indicates both uplink and downlink services, then the indication information of the first AC included in the setup request information or the response information must correspond to the aforementioned uplink and downlink services respectively. This is because the access category field used to carry the indication information of the AC includes 8 bits, which can indicate the new AC corresponding to the uplink low-latency service and the low-latency service respectively.

[0212] The method embodiments of this application have been described above. The corresponding device embodiments will be described below.

[0213] Figure 9 This is a schematic diagram of a communication device provided in an embodiment of this application. The communication device includes a processor 901, a memory 902, and a communication interface 903, which are interconnected via a bus 904. It should be understood that... Figure 9 The communication device shown can be an access point or a station.

[0214] The memory 902 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), and is used for related instructions and data.

[0215] Processor 901 can be one or more central processing units (CPUs). If processor 901 is a CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0216] When the communication device is an access point, the processor 901 in the communication device reads the program code stored in the memory 902 and performs the following operations:

[0217] The communication interface receives a restricted target wake-up time establishment request information sent by the station. This restricted target wake-up time establishment request information is used to request the establishment of a restricted target wake-up time.

[0218] The restricted target wake-up time response information is sent to the station through the communication interface. The restricted target wake-up time response information is a response to the restricted target wake-up time establishment request information. The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes the indication information of the first AC.

[0219] In one possible implementation, the request information includes indication information #B, and the response information includes indication information #A, #C, or #D. For details, please refer to the description of the method embodiments above, which will not be repeated here.

[0220] When the communication device is a station, the processor 901 in the communication device reads the program code stored in the memory 902 and performs the following operations:

[0221] The restricted target wake-up time establishment request information is sent through the communication interface. This restricted target wake-up time establishment request information is used to request the establishment of a restricted target wake-up time.

[0222] The communication interface receives restricted target wake-up time response information sent by the access point. This restricted target wake-up time response information is a response to the restricted target wake-up time establishment request information. The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes indication information of the first AC.

[0223] In one possible implementation, the request information includes indication information #B, and the response information includes indication information #A, #C, or #D. For details, please refer to the description of the method embodiments above, which will not be repeated here.

[0224] in addition, Figure 9 The implementation of each operation can also be found by referring to... Figure 2 The corresponding description of the method embodiments shown.

[0225] Figure 10This is a schematic diagram of another communication device provided in an embodiment of this application. This communication device can be applied to an access point or a site, and can be used to implement the methods involved in the above embodiments. The communication device includes a transceiver unit 1001. The transceiver unit 1001 will be described below.

[0226] When the communication device is an access point, the transceiver unit 1001 is used to receive restricted target wake-up time establishment request information sent by the site and to send restricted target wake-up time response information to the site.

[0227] Optionally, the communication device further includes a processing unit 1002, which is used to perform actions such as decision-making and judgment involved in the above method embodiments. For example, when the access point determines the AC corresponding to the low-latency service of the site, it is used to determine the response information to be sent to the site, including the indication information of the first AC.

[0228] When the communication device is a station, the transceiver unit 1001 is used to send restricted target wake-up time establishment request information to the access point and to receive restricted target wake-up time response information sent by the access point.

[0229] Optionally, the communication device further includes a processing unit 1002, which is used to perform actions such as decision-making and judgment involved in the above method embodiments. For example, when a site determines that it needs to request a change of the AC corresponding to a low-latency service, it is used to determine to send establishment request information including indication information of a first AC to the access point.

[0230] in addition, Figure 10 The implementation of each operation can also be described in accordance with the methods shown in the above embodiments, and will not be repeated here.

[0231] This application also provides a chip, including a processor, for calling and executing instructions stored in a memory, causing a communication device equipped with the chip to perform the methods described in the above examples.

[0232] This application embodiment also provides another chip, including: an input interface, an output interface, a processor, and a memory. The input interface, the output interface, the processor, and the memory are connected through an internal connection path. The processor is used to execute code in the memory. When the code is executed, the processor is used to execute the methods in the above examples.

[0233] This application also provides a processor for coupling with a memory to execute the methods and functions related to satellites or user equipment in any of the above embodiments.

[0234] In another embodiment of this application, a computer program product is provided, which, when run on a computer, enables the implementation of the methods described in the foregoing embodiments.

[0235] In another embodiment of this application, a computer-readable storage medium is provided, which stores a computer program that, when executed by a computer, implements the methods described in the foregoing embodiments.

[0236] In the description of the embodiments of this application, unless otherwise stated, "multiple" refers to two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple. Furthermore, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that "first" and "second" are not necessarily different. Meanwhile, in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate that something is being used as an example, illustration, or explanation.

[0237] Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being better or more advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner for ease of understanding.

[0238] In the description of the embodiments of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between the related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural.

[0239] It should be understood that "an embodiment" or "an embodiment" as used throughout the specification means that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention.

[0240] Therefore, the phrases "in one embodiment" or "in one embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the various embodiments of the invention, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the invention.

[0241] It is understood that the term "embodiment" as used throughout the specification means that a particular feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application.

[0242] Therefore, the various embodiments throughout this specification do not necessarily refer to the same embodiments. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It is understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0243] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0244] Those skilled in the art will readily understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0245] Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0246] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, the functional units in the various embodiments of this application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0247] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0248] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for data transmission, characterized in that, include: The access point receives restricted target wake-up time establishment request information sent by the site, the restricted target wake-up time establishment request information being used to request the establishment of a restricted target wake-up time; The access point sends a restricted target wake-up time response message to the site. The restricted target wake-up time response message is used to respond to the restricted target wake-up time establishment request message. The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes indication information of the first access category corresponding to the low-latency service of the site. The indication information for the first access category is either an access category index value or a bitmap.

2. The method according to claim 1, characterized in that, The restricted target wake-up time response information includes first indication information. When the first indication information is a first value, the first value is used to indicate that the restricted target wake-up time response information includes the indication information of the first access category; or, When the first indication information is a second value, the second value is used to indicate that the restricted target wake-up time response information does not include the indication information of the first access category.

3. The method according to claim 1, characterized in that, The restricted target wake-up time establishment request information includes second indication information. When the second indication information is the first value, the first value is used to indicate that the restricted target wake-up time establishment request information includes the indication information of the first access category; or, When the second indication information is a second value, the second value is used to indicate that the restricted target wake-up time establishment request information does not include the indication information of the first access category.

4. The method according to claim 1 or 3, characterized in that, When the restricted target wake-up time establishment request information includes the indication information of the first access category, the restricted target wake-up time response information includes the third indication information. When the third indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, When the third indication information is the second value, the second value is used to indicate that the access point rejects the indication information of the first access category.

5. The method according to claim 4, characterized in that, The second value is also used to indicate that the restricted target wake-up time response information also includes indication information of the second access category corresponding to the low-latency service of the site.

6. The method according to claim 1 or 3, characterized in that, When the restricted target wake-up time establishment request information includes the indication information of the first access category, the restricted target wake-up time response information includes the fourth indication information. When the fourth indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, When the fourth indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category; When the fourth indication information is the third value, the third value is used to indicate that the restricted target wake-up time response information also includes the indication information of the third access category corresponding to the low latency service of the site.

7. The method according to any one of claims 1 to 3 and 5, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category.

8. The method according to claim 2, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information, and the restricted target wake-up time service information includes an access category field, and the access category field is used to carry indication information of the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the first indication information.

9. The method according to claim 3, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information, and the restricted target wake-up time service information includes an access category field, and the access category field is used to carry indication information of the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the second indication information.

10. The method according to claim 4, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information, and the restricted target wake-up time service information includes an access category field, and the access category field is used to carry indication information of the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the third indication information.

11. The method according to claim 6, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information, and the restricted target wake-up time service information includes an access category field, and the access category field is used to carry indication information of the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the fourth indication information.

12. A method for data transmission, characterized in that, include: The site sends a restricted target wake-up time establishment request to the access point, the restricted target wake-up time establishment request information being used to request the establishment of a restricted target wake-up time; The site receives restricted target wake-up time response information sent by the access point. This restricted target wake-up time response information is used to respond to the restricted target wake-up time establishment request information. The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes indication information of the first access category corresponding to the low-latency service of the site. The indication information for the first access category is either an access category index value or a bitmap.

13. The method according to claim 12, characterized in that, The restricted target wake-up time response information includes first indication information. When the first indication information is a first value, the first value is used to indicate that the restricted target wake-up time response information includes the indication information of the first access category; or, When the first indication information is a second value, the second value is used to indicate that the restricted target wake-up time response information does not include the indication information of the first access category.

14. The method according to claim 12, characterized in that, The restricted target wake-up time establishment request information includes second indication information. When the second indication information is the first value, the first value is used to indicate that the restricted target wake-up time establishment request information includes the indication information of the first access category; or, When the second indication information is a second value, the second value is used to indicate that the restricted target wake-up time establishment request information does not include the indication information of the first access category.

15. The method according to claim 12 or 14, characterized in that, When the restricted target wake-up time establishment request information includes the indication information of the first access category, the restricted target wake-up time response information includes the third indication information. When the third indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, When the third indication information is the second value, the second value is used to indicate that the access point rejects the indication information of the first access category.

16. The method according to claim 15, characterized in that, The second value is also used to indicate that the restricted target wake-up time response information also includes indication information of the second access category corresponding to the low-latency service of the site.

17. The method according to claim 12 or 14, characterized in that, When the restricted target wake-up time establishment request information includes the indication information of the first access category, the restricted target wake-up time response information includes the fourth indication information. When the fourth indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, When the fourth indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category; When the fourth indication information is the third value, the third value is used to indicate that the restricted target wake-up time response information also includes the indication information of the third access category corresponding to the low latency service of the site.

18. The method according to any one of claims 12 to 14 and 16, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category.

19. The method according to claim 13, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the first indication information.

20. The method according to claim 14, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the second indication information.

21. The method according to claim 15, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the third indication information.

22. The method according to claim 17, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the fourth indication information.

23. A communication device, characterized in that, include: The transceiver unit is used to receive restricted target wake-up time establishment request information sent by the site, wherein the restricted target wake-up time establishment request information is used to request the establishment of a restricted target wake-up time; The transceiver unit is further configured to send restricted target wake-up time response information to the site, the restricted target wake-up time response information being used to respond to the restricted target wake-up time establishment request information. The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes indication information of the first access category corresponding to the low-latency service of the site. The indication information for the first access category is either an access category index value or a bitmap.

24. The apparatus according to claim 23, characterized in that, The restricted target wake-up time response information includes first indication information. When the first indication information is a first value, the first value is used to indicate that the restricted target wake-up time response information includes the indication information of the first access category; or, When the first indication information is a second value, the second value is used to indicate that the restricted target wake-up time response information does not include the indication information of the first access category.

25. The apparatus according to claim 23, characterized in that, The restricted target wake-up time establishment request information includes second indication information. When the second indication information is the first value, the first value is used to indicate that the restricted target wake-up time establishment request information includes the indication information of the first access category; or, When the second indication information is a second value, the second value is used to indicate that the restricted target wake-up time establishment request information does not include the indication information of the first access category.

26. The apparatus according to claim 23 or 25, characterized in that, When the restricted target wake-up time establishment request information includes the indication information of the first access category, the restricted target wake-up time response information includes the third indication information. When the third indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, When the third indication information is the second value, the second value is used to indicate that the access point rejects the indication information of the first access category.

27. The apparatus according to claim 26, characterized in that, The second value is also used to indicate that the restricted target wake-up time response information also includes indication information of the second access category corresponding to the low-latency service of the site.

28. The apparatus according to claim 23 or 26, characterized in that, When the restricted target wake-up time establishment request information includes the indication information of the first access category, the restricted target wake-up time response information includes the fourth indication information. When the fourth indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, When the fourth indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category; When the fourth indication information is the third value, the third value is used to indicate that the restricted target wake-up time response information also includes the indication information of the third access category corresponding to the low latency service of the site.

29. The apparatus according to any one of claims 23 to 25 and 27, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category.

30. The apparatus according to claim 24, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the first indication information.

31. The apparatus according to claim 25, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the second indication information.

32. The apparatus according to claim 26, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the third indication information.

33. The apparatus according to claim 28, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the fourth indication information.

34. A communication device, characterized in that, include: The transceiver unit is used to send restricted target wake-up time establishment request information to the access point, wherein the restricted target wake-up time establishment request information is used to request the establishment of a restricted target wake-up time; The transceiver unit is further configured to receive restricted target wake-up time response information sent by the access point, the restricted target wake-up time response information being used to respond to the restricted target wake-up time establishment request information. The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes indication information of the first access category corresponding to the low-latency service of the site. The indication information for the first access category is either an access category index value or a bitmap.

35. The apparatus according to claim 34, characterized in that, The restricted target wake-up time response information includes first indication information. When the first indication information is a first value, the first value is used to indicate that the restricted target wake-up time response information includes the indication information of the first access category; or, When the first indication information is a second value, the second value is used to indicate that the restricted target wake-up time response information does not include the indication information of the first access category.

36. The apparatus according to claim 34, characterized in that, The restricted target wake-up time establishment request information includes second indication information. When the second indication information is the first value, the first value is used to indicate that the restricted target wake-up time establishment request information includes the indication information of the first access category; or, When the second indication information is a second value, the second value is used to indicate that the restricted target wake-up time establishment request information does not include the indication information of the first access category.

37. The apparatus according to claim 34 or 36, characterized in that, When the restricted target wake-up time establishment request information includes the indication information of the first access category, the restricted target wake-up time response information includes the third indication information. When the third indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, When the third indication information is the second value, the second value is used to indicate that the access point rejects the indication information of the first access category.

38. The apparatus according to claim 37, characterized in that, The second value is also used to indicate that the restricted target wake-up time response information also includes indication information of the second access category corresponding to the low-latency service of the site.

39. The apparatus according to claim 34 or 36, characterized in that, When the restricted target wake-up time establishment request information includes the indication information of the first access category, the restricted target wake-up time response information includes the fourth indication information. When the fourth indication information is a first value, the first value is used to indicate that the access point agrees to the indication information of the first access category; or, When the fourth indication information is a second value, the second value is used to indicate that the access point rejects the indication information of the first access category; When the fourth indication information is the third value, the third value is used to indicate that the restricted target wake-up time response information also includes the indication information of the third access category corresponding to the low latency service of the site.

40. The apparatus according to any one of claims 34 to 36 and 38, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category.

41. The apparatus according to claim 35, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the first indication information.

42. The apparatus according to claim 36, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the second indication information.

43. The apparatus according to claim 37, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the third indication information.

44. The apparatus according to claim 39, characterized in that, The restricted target wake-up time establishment request information or the restricted target wake-up time response information includes restricted target wake-up time service information. The restricted target wake-up time service information includes an access category field, which carries indication information for the first access category. The restricted target wake-up time service information also includes a service information control field, which is located before the access category field and is used to carry the fourth indication information.

45. A communication device, characterized in that, include: A communication interface and a processor, the processor being configured to execute a computer program or instructions that cause the communication device to perform the method as described in any one of claims 1-22.

46. ​​A computer-readable storage medium, characterized in that, It includes a computer program or instructions that, when run on a computer, cause the computer to perform the method as described in any one of claims 1-22.

47. A computer program product, characterized in that, It includes instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1-22.

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