Method and apparatus for supporting data transmission by ap mld of wireless tsn

Abstract

Embodiments of the present application provide a TID-based RTWT SP, which can be configured for trigger-based transmission or EDCA-based transmission for time-sensitive traffic, to reduce the contention / conflict of time-sensitive traffic caused by non-time-sensitive traffic using the EDCA mechanism. When trigger-based transmission and EDCA-based transmission are used simultaneously in the same TID-based RTWT SP, it can also reduce the contention / conflict of time-sensitive traffic. The AP MLD can dynamically adjust the scheduling of the TID-SP of the trigger-based transmission or the EDCA-based transmission according to the requirements of the time-sensitive traffic and / or the traffic load situation, and announce the new TID-SP scheduling, and can prioritize the transmission of time-sensitive traffic to meet the QoS requirements.

Description

Technical Field

[0001] The embodiments of this invention generally relate to the field of wireless communication. More specifically, the embodiments of this invention relate to communication systems and methods in wireless time-sensitive networks. Background Technology

[0002] Modern electronic devices typically use Wi-Fi to wirelessly send and receive data with other electronic devices, and some of these devices are "dual-band" devices, comprising at least two wireless transceivers capable of operating in different frequency bands, such as 2.4 GHz, 5 GHz, and 6 GHz. In most cases, wireless devices can only communicate over a single frequency band at a time. For example, older low-power devices (such as battery-powered devices) typically operate on the 2.4 GHz band. Newer devices and those requiring greater bandwidth typically operate on the 5 GHz band. The availability of the 6 GHz band is a recent development, offering high performance, low latency, and fast data rates.

[0003] Using a single frequency band may not meet the bandwidth or latency requirements of some devices. Therefore, some wireless communication methods under development increase communication bandwidth by operating simultaneously on multiple frequency bands (technically known as link aggregation or multi-link operation). Advantageously, multi-link operation can provide higher network throughput and improved network flexibility compared to traditional techniques used in wireless communication.

[0004] Furthermore, some deterministic networks have specific timing requirements for time-sensitive data transmission. For example, Time-Sensitive Networking (TSN) is a set of standards that defines requirements for time synchronization, scheduling, traffic shaping, communication path selection, reservation, and fault tolerance, introducing the concept of "time" into network communication. Examples of TSN use cases include control networks that receive input from detectors, perform control loop processing, and initiate actions; safety-critical networks that implement packet and link redundancy; and mixed-media networks that process data with different levels of time sensitivity and priority, such as vehicle networks supporting climate control, infotainment, body electronics, and driver assistance. The TSN standard serves as the foundation for deterministic networks to meet the common requirements of these applications. TSN can provide time synchronization for network entities within a TSN network. TSN also provides frame duplication and elimination mechanisms to ensure reliable transmission.

[0005] To date, the TSN standard has been implemented as a link-layer technology over wired networks such as Ethernet. A time-sensitive communication method integrating the TSN standard for wireless devices is needed. Summary of the Invention

[0006] There is a need for a time-sensitive communication method utilizing the TSN standard for communication over wireless networks, including wireless communication by multi-link devices (MLDs) across multiple wireless links. Wireless Local Area Networks (WLANs) integrating TSN or working with TSN can advantageously synchronize the timing of access points (APs) within an extended service set (ESS). Furthermore, since transmission failure rates in WLANs can significantly impact time-sensitive applications, TSN transmission mechanisms can improve transmission reliability by using duplicate transmissions on one or more links to communicate with one or more APs.

[0007] Therefore, embodiments of the present invention provide systems, devices, and methods for wireless communication that improve the transmission reliability of time-sensitive services over multiple wireless communication links in a wireless TSN. The transmission device can be configured for uplink QoS transmission based on transmission QoS information (e.g., traffic profile) received from a TSN configuration server or from an application running on the transmission device. Embodiments of the present invention provide a restricted target wake time (RTWT) service period (SP) based on a traffic identifier (TID). This service period (SP) can be configured for triggered-based transmission or enhanced distributed channel access (EDCA)-based transmission for time-sensitive or priority services to reduce contention / conflicts caused by non-time-sensitive services using the EDCA mechanism. This also reduces contention for time-sensitive services caused by non-time-sensitive services using the EDCA mechanism when using both triggered-based and EDCA-based transmissions within the same TID-based RTWT SP (TID-SP). AP MLD can dynamically adjust the scheduling of TID-SPs for trigger-based or EDCA-based transmissions based on the requirements of time-sensitive services and / or service load, and can prioritize time-sensitive transmissions to meet QoS requirements.

[0008] According to one embodiment, a method for wireless data transmission in a Time-Sensitive Network (TSN) is disclosed, using an access point (AP) multi-link device (MLD) supporting a TSN. The method includes: scheduling a Time-Independent Target Wake-Up Time (TID-SP) to perform a time-sensitive transmission with a radio station (STA) MLD; transmitting a Broadcast-Limited Target Wake-Up Time (RTWT) element including TID-SP information in a beacon frame; and receiving data from a STA belonging to the STA MLD during the TID-SP.

[0009] According to some embodiments, the method includes adjusting the scheduling of the TID-SP based on requirements related to at least one of time-sensitive transmission and traffic load conditions, and announcing the new scheduling of the adjusted TID-SP.

[0010] According to some embodiments, scheduling TID-SP includes scheduling TID-SP for EDCA transmission.

[0011] According to some embodiments, scheduling TID-SP includes scheduling TID-SP for trigger-based (TB) transmissions.

[0012] According to some embodiments, the method includes: dynamically changing the scheduling of TID-SPs used for EDCA transmission.

[0013] According to some embodiments, the method includes: dynamically changing the scheduling of TID-SPs for trigger-based transmissions.

[0014] According to some embodiments, the method includes receiving an indication of RTWT TID-SP capability from the STA during the association process.

[0015] According to some embodiments, the method includes: receiving a target wake time (TWT) setting request for establishing a RTWT SP for a TID, the request including an SP type and TID information, wherein the SP type includes at least one of the following: a trigger-based transmission of the TID, or an EDCA-based transmission of the TID.

[0016] According to some embodiments, the method includes: sending a target wake time (TWT) setting response to determine an RTWT TID-SP, the TWT setting response including: SP type, TID information and transmission parameters.

[0017] According to some embodiments, the method includes prioritizing time-sensitive transmission to meet quality of service (QoS) requirements.

[0018] According to another embodiment, a method for a wireless station (STA) multi-link device (MLD) to perform wireless data transmission in a time-sensitive network (TSN) is disclosed. The method includes: receiving a restricted target wake time (RTWT) element including TID-SP information from a beacon frame from the AP MLD; scheduling the TID-SP in the AP MLD for performing time-sensitive transmission; and transmitting data to the AP MLD during the TID-SP.

[0019] According to some embodiments, the method includes: sending data to the AP MLD during a TID-SP, including: receiving a trigger frame in a trigger-based (TB) TID-SP, performing a trigger-based (TB) response, and sending a TB physical layer protocol data unit (PPDU), the PPDU including a MAC Service Data Unit (MSDU) and a TID corresponding to the MSDU, the TID corresponding to the MSDU being a TID allowed in the TID-SP.

[0020] According to some embodiments, the method includes: sending data to the AP MLD during TID-SP, including: performing enhanced distributed channel access (EDCA) or EDCA with priority access to obtain the radio medium of the wireless network, and sending a PPDU including an MSDU and a TID corresponding to the MSDU, wherein the TID corresponding to the MSDU is equal to the TID allowed in TID-SP.

[0021] According to some embodiments, the method includes sending an indication of RTWT TID-SP capability to the AP during the association process.

[0022] According to some embodiments, the method includes: sending a target wake time (TWT) setting request for establishing a TID RTWT SP, the request including SP type and TID information, wherein the SP type includes at least one of trigger-based transmission of TID and EDCA-based transmission of TID.

[0023] According to some embodiments, the method includes: receiving a target wake time (TWT) setting response to confirm the RTWT TID-SP, the TWT setting response including SP type, TID information and transmission parameters.

[0024] According to some embodiments, the method includes: performing an EDCA with priority access for channel access, and transmitting a PPDU including an MSDU having a TID in a TID-SP that is allowed for the TID-SP, which is not scheduled for an STA belonging to a STA MLD.

[0025] According to various embodiments, an apparatus for wireless data transmission in a wireless time-sensitive network (TSN) for a wireless access point multilink device is disclosed. The apparatus includes: a processor, a memory coupled to the processor capable of storing data, and multiple radio modules operable to perform wireless TSN transmissions. The processor operablely schedules a Time-Sensitive Information Distribution (TID-SP) to perform time-sensitive transmissions with a radio station (STA) MLD, transmits TID-SP information in the target wake time (TWT) element of a beacon frame, and receives data from the STA MLD during the TID-SP.

[0026] According to some embodiments, the processor can also operable to adjust the scheduling of TID-SPs and announce new scheduling of TID-SPs based on the requirements of at least one of time-sensitive transmission and traffic load conditions.

[0027] According to some embodiments, the processor is also operable to dynamically change the TID-SP used for Enhanced Distributed Channel Access (EDCA) transmission and announce new scheduling for the TID-SP. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the invention and, together with the specification, serve to explain the principles of the invention:

[0029] Figure 1 This is a schematic diagram of an exemplary time-sensitive transmission between multi-link devices in a wireless network according to an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of a service time period information element based on TID according to an embodiment of the present invention.

[0031] Figure 3 This is a flowchart illustrating an exemplary process for performing time-sensitive transmission during TID-SP according to an embodiment of the present invention.

[0032] Figure 4 This is a block diagram of an exemplary computer system platform on which embodiments of the present invention can be implemented. Detailed Implementation

[0033] Several embodiments will now be described in detail. Although the subject matter will be described in conjunction with alternative embodiments, it should be understood that they are not intended to limit the claimed subject matter to these embodiments. Rather, the claimed subject matter is intended to cover alternatives, modifications, and equivalents that may be included within the spirit and scope of the claimed subject matter as defined in the appended claims.

[0034] Furthermore, numerous specific details are set forth in the following detailed description to provide a thorough understanding of the claimed subject matter. However, those skilled in the art will recognize that embodiments may be practiced without these specific details or their equivalents. In other instances, well-known methods, processes, components, and circuits have not been described in detail to avoid unnecessarily obscuring aspects and features of the subject matter.

[0035] The following detailed description will be presented and discussed from a methodological perspective. Although the operation of the method is described in the diagram (e.g.) Figure 3 The steps and their order are disclosed in the document, but such steps and order are exemplary. The embodiments are well adapted to perform various other steps or variations of the steps listed in the flowcharts of the accompanying drawings, and to perform them in a different order than that described herein.

[0036] The following sections are described in detail as representing the processes, steps, logic blocks, operations, and other symbolic representations of operations on data bits within computer memory. These descriptions and representations are the means by which those skilled in the art of data processing most effectively communicate the substance of their work to others skilled in the art. The processes, computer execution steps, logic blocks, operations, etc., described herein are generally conceived as self-consistent steps or instructions that result in a desired outcome. Steps are those that require physical manipulation of physical quantities. While not strictly necessary, these quantities are often in the form of electrical or magnetic signals on a computer-readable storage medium, which can be stored, transferred, combined, compared, and manipulated by other operations within the computer system. Primarily for reasons of general use, it has proven convenient to refer to these signals as bits, values, elements, symbols, characters, terms, numbers, etc.

[0037] However, it should be remembered that all these and similar terms will be associated with appropriate physical quantities and are convenient labels applicable to those quantities. Unless specifically stated otherwise, as will be apparent from the discussion below, it will be understood throughout this invention that discussions using terms such as “access,” “configuration,” “coordination,” “storage,” “transmission,” “authentication,” “identification,” “request,” “report,” “determine,” etc., refer to the actions and processes of a computer system or similar electronic computing device that manipulates data represented as physical (electronic) quantities in computer system registers and memories and converts it into other data similarly represented as physical quantities in computer system memories or registers or other such information storage, transmission, or display devices.

[0038] Some embodiments can be described within a general context of computer-executable instructions (e.g., program modules) that are executed by one or more computers or other devices. Typically, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. The functionality of a program module can typically be combined or distributed as needed in various embodiments.

[0039] Priority service hours

[0040] Embodiments of the present invention provide wireless communication systems, apparatus, and methods for performing reliable transmission of time-sensitive user data over multiple wireless communication links in a wireless time-sensitive network (TSN). The transmission equipment can be configured and scheduled for uplink transmissions based on transmission information (e.g., traffic profiles) received from a TSN configuration server or an application running on the transmission equipment. This document describes a TID-based RTWT SP that can be configured for either trigger-based or EDCA-based transmissions for time-sensitive services to reduce contention / conflicts caused by non-time-sensitive services using the EDCA mechanism. This also reduces contention for time-sensitive services caused by non-time-sensitive services using the EDCA mechanism when both trigger-based and EDCA-based transmissions are used within the same TID-based RTWT SP. The AP MLD can dynamically adjust the scheduling of TID-SPs for trigger-based or EDCA-based transmissions based on the requirements of time-sensitive services and / or link load conditions, and can prioritize time-sensitive transmissions to meet QoS requirements.

[0041] Some wireless transmissions use target wake time (TWT) to manage activity in wireless communication. For example, TWT can reduce medium contention between STAs and reduce the amount of time required for wireless devices using power-saving modes to wake from sleep. Multiple STAs can be scheduled to operate on non-overlapping times and / or frequencies and centrally exchange frames within a predefined service period (SP).

[0042] Broadcast TWT is a method by which an AP allocates a time interval (or SP) during which only the designated STA can communicate with the AP. A broadcast TWT SP is uniquely identified by a tuple of <Broadcast TWT ID, MAC address of the AP scheduling the TWT>. Broadcast TWT SPs are recommended for unconstrained frame transmissions, solicited feedback not initiated by Uplink OFDMA random access (UORA), solicited status and solicited feedback initiated by UORA, and unconstrained frame transmissions (except for the AP sending a traffic indication map (TIM) at the beginning of each TWT SP). RTWT is a broadcast type of TWT that allows only a certain type of traffic during the service period. RTWT SPs are recommended for service periods (or priority service periods) for sending time-sensitive or priority traffic with predictable delays. The RTWT setup procedure specifies which TIDs or priority traffic will be served during the RTWT SP. However, the existing RTWT establishment procedure does not specify a mechanism for allowing UL transmissions based on EDCA with priority access during service periods. Priority service periods can be the periods during which STAs with priority access transmit services.

[0043] Triggered UL transmissions are triggered by APs belonging to the AP MLD and have a basic trigger variant for scheduled UL data frame transmissions from one or more STAs not belonging to the AP MLD. This type of UL transmission from STAs is entirely dependent on AP scheduling and may not be flexible enough for STAs to handle bursty UL traffic within the RTWT SP. Furthermore, the RTWT SP setup process does not separate the trigger-based UL transmission mechanism from the EDCA-based UL transmission mechanism within the same RTWT SP. Allowing both channel access mechanisms within a single SP increases scheduling complexity, which can lead to performance degradation, such as increased channel access delay and power consumption of battery-powered devices, especially for EDCA-based UL transmissions.

[0044] Traffic ID (TID) information is a Quality of Service (QoS) characteristic. Wireless devices can use this QoS characteristic to determine and select user priority (UP) or traffic specification (TSPEC) corresponding to prioritized service QoS parameters. For example, in a WLAN, data packets can be video, voice, or data streams, and each category can have different priorities. TID information can be used as an identifier to classify data packets in a wireless LAN. According to embodiments of the present invention, TID-based RTWT SP restricts QoS transmission to only the specified TID. Scheduled STAs belonging to non-AP MLDs can use EDCA for channel access in TID-based RTWT SPs to effectively handle bursty UL QoS traffic.

[0045] TID-based RTWT SPs (i.e., TID-SPs) can be configured for trigger-based or EDCA-based transmissions of time-sensitive services, reducing contention / conflicts caused by non-time-sensitive services using the EDCA mechanism within the TID-SP. This also reduces contention for time-sensitive services when using both trigger-based and EDCA-based transmissions within the same TID-SP. Furthermore, APs belonging to the AP MLD can dynamically adjust the scheduling of TID-SPs used for trigger-based or EDCA-based transmissions based on the requirements of time-sensitive services and / or link load, and announce new schedules. Time-sensitive transmissions can also be prioritized to meet QoS requirements.

[0046] A STA belonging to a non-AP MLD that supports TID-SP initiates a TID-based RTWT SP establishment during or after association with an AP belonging to the AP MLD, indicating RTWT TID-SP capability. The initiating STA sends a TWT establishment request carrying the SP type (triggered transport or EDCA-based transport) and TID information to establish an RTWT SP with the AP belonging to the AP MLD for UL QoS transport on the specified TID. The belonging AP sends a TWT establishment response carrying the SP type, TID information, and other parameters to confirm the RTWT TID-SP establishment between the STA (e.g., the scheduled STA) and the AP (e.g., the scheduling AP).

[0047] During operation, the AP schedules a TID-SP for either trigger-based (TB) or EDCA-based transmissions and announces the TID-SP in the RTWT element carried in the beacon frame. In a TID-SP for TB transmissions, the AP sends a trigger frame to initiate a TB response from a scheduled STA belonging to a non-AP MLD. The scheduled STA belonging to the non-AP MLD has already established a TID-SP with the AP belonging to the AP MLD. After receiving the trigger frame in the SP associated with the TID, the scheduled STA performs a TB response and / or sends a TB physical layer protocol data unit (PPDU) carrying an MSDU or aggregate-MSDU (A-MSDU) and the corresponding TID, which is equal to the TID allowed by the trigger-based TID-SP. For EDCA-based TID-SP, the scheduled STA performs EDCA to obtain the radio medium and sends a PPDU carrying an MSDU or A-MSDU and the TID corresponding to that MSDU or aggregated-MSDU. The TID corresponding to that MSDU or A-MSDU is equal to the TID allowed in the triggered TID-SP.

[0048] Figure 1This is a transmission timing diagram of an exemplary time-sensitive transmission 100 in a wireless network according to an embodiment of the present invention. AP 105 belongs to an AP MLD that supports TID-SP transmission and schedules TID-SP for trigger-based or EDCA-based transmission, and announces the TID-SP in the RTWT element carried in beacon frame 120. AP 105 then sends a trigger frame 125 in the trigger-based TID-SP, which is received by scheduled STAs 110 and / or 115 belonging to a non-AP MLD that supports TID-SP transmission. Trigger frame 125 is transmitted in the SP associated with the TID to initiate a TB response from the scheduled STA. During the trigger-based TID-SP, the scheduled STA performs a TB response and sends a TB PPDU carrying an MSDU or A-MSDU and the TID corresponding to the MSDU or A-MSDU, where the TID corresponding to the MSDU or A-MSDU is equal to the TID allowed by the TID-SP. During EDCA-based TID-SP, the scheduled STA performs EDCA or EDCA with priority access to obtain the medium and transmits a PPDU carrying an MSDU (or A-MSDU) and the TID corresponding to the MSDU or A-MSDU. The TID corresponding to the MSDU (or A-MSDU) is equal to the TID allowed by TID-SP. When priority access is enabled, even if TID-SP is not scheduled for a STA belonging to a non-AP MLD with priority access enabled, the STA belonging to a non-AP MLD with priority access enabled can still perform EDCA with priority access to access the channel and transmit a PPDU carrying an MSDU or A-MSDU with the TID allowed by TID-SP.

[0049] like Figure 1As shown, AP 105 can dynamically adjust the scheduling of TID-SPs for triggered or EDCA-based transmissions, and announce new TID-SPs in the RTWT element carried in the beacon frame according to the requirements of time-sensitive services and / or link load conditions, prioritizing time-sensitive transmissions to meet QoS requirements. During triggered TID-SP 130, scheduled STAs 110 and 115 send TBPPDUs 135 and 140 carrying an MSDU or A-MSDU and the TID corresponding to that MSDU or A-MSDU, where the TID is equal to the TID allowed by the SP. During EDCA-based TID-SP 145, scheduled STAs 110 and 115 perform EDCA to obtain the medium and send PPDUs 150 and 155 carrying an MSDU or A-MSDU and the TID corresponding to that MSDU or A-MSDU, where the TID is equal to the TID allowed by the TID-SP.

[0050] Figure 2 Some exemplary information in the RTWT information element (IE) format 200 according to an embodiment of the present invention is depicted. The RTWT SP inherits the mechanism of the broadcast TWT SP and has certain transmission restrictions. The RTWT DL TID bitmap 205 of the RTWT element indicates the TID of the allowed DL transmission in the RTWT SP (e.g., TID-SP). The RTWT UL TID bitmap 210 of the RTWT element indicates the TID of the allowed UL transmission in the TID-SP. SP type 215 indicates the allowed access type during the service period. For trigger-based SPs, APs belonging to the AP MLD are allowed to send a trigger frame on the corresponding link to initiate TB UL transmission in that SP.

[0051] For EDCA-based TID-SPs, scheduled STAs belonging to non-AP MLDs are allowed to perform EDCA or have priority access to send PPDUs carrying MSDUs (or A-MSDUs) and the corresponding TIDs, where the TID is equal to the TIDs allowed by the TID-SP. The allowed TIDs for UL transmissions are indicated in the RTWT UL TID bitmap subfield of the RTWT element. SP synchronization bitmap 220 (optional) can indicate whether the timing of this TID-SP is synchronized with the timing of TID-SPs on other links. A bit in the SP synchronization bitmap corresponding to a link is set to 1, indicating that the timing of the TID-SP on that link (i.e., the link corresponding to the bit set to 1) is synchronized with the timing of this TID-SP. Otherwise, it indicates asynchrony. If more than one bit in the SP synchronization bitmap is set to "1", the non-AP MLD can perform the EDCA process and transmit substantially simultaneously on multiple corresponding links.

[0052] When priority access is enabled, associated STAs belonging to a non-AP MLD with priority access enabled can execute an EDCA with priority access for channel access and transmit a PPDU carrying an MSDU or A-MSDU, where the MSDU or A-MSDU has a TID allowed by the TID-SP, which may not be scheduled for STAs with non-AP MLDs with priority access enabled. This can give priority to non-AP MLDs with priority access enabled in the RTWT's TID-SP compared to non-AP MLDs with non-priority access enabled. An EDCA with priority access in the RTWT's TID-SP has higher priority for channel access than a normal EDCA.

[0053] Figure 3 This is a flowchart illustrating an exemplary sequence of steps implemented by a computer in a process 300 for time-sensitive transmission during TID-SP in a wireless network according to an embodiment of the present invention.

[0054] In step 305, the STA belonging to the STA MLD that supports TID-SP transmission indicates support for RTWT TID-SP capability during the association process with the AP belonging to the AP MLD that supports TID-SP transmission.

[0055] In step 310, the STA sends a TWT establishment request carrying SP type (triggered transmission or EDCA-based transmission), TID information and other parameters to establish an RTWT SP with the AP for sending user data with the specified TID.

[0056] In step 315, the AP sends a TWT establishment response carrying SP type (triggered transmission or EDCA-based transmission), TID information and other parameters to confirm the RTWT SP establishment between the scheduled STA and the scheduling AP.

[0057] In step 320, the affiliated AP schedules TID-SPs for triggered or EDCA-based transmissions and announces the TID-SPs in the RTWT element carried in the beacon frame. The AP can dynamically adjust the scheduling of TID-SPs for triggered or EDCA-based transmissions according to the requirements of time-sensitive services and / or the service load on the link, announce new TID-SPs in the RTWT element carried in the beacon frame, and prioritize time-sensitive transmissions to meet QoS requirements.

[0058] In step 325, for trigger-based transmissions, the AP sends a trigger frame in the TID-SP so that a STA using a non-AP MLD that supports TID-SP transmissions can receive the trigger frame. The trigger frame is then sent in the SP associated with the TID to initiate a TB response from the responding STA.

[0059] In step 330, for a trigger-based TID-SP, the scheduled responding STA executes a TB response and sends a TB PPDU carrying an MSDU or A-MSDU and the TID corresponding to the MSDU or A-MSDU, where the TID is equal to the TID allowed by the TID-SP. For an EDCA-based TID-SP, a scheduled responding STA belonging to a non-AP MLD executes an EDCA or an EDCA with priority access to obtain the medium and sends a PPDU carrying an MSDU (or A-MSDU) and the TID corresponding to the MSDU or A-MSDU, where the TID is equal to the TID allowed by the TID-SP. When priority access is enabled, a STA belonging to a non-AP MLD with priority access enabled can execute an EDCA with priority access to access the channel and send a PPDU carrying an MSDU or A-MSDU with the TID allowed by the TID-SP, where the TID-SP may not be scheduled for a non-AP MLD with priority access enabled.

[0060] In step 335, the AP adjusts the scheduling (e.g., transmission time, frequency, and duration) of TID-SPs for triggered or EDCA-based transmissions based on the requirements of time-sensitive services and / or service load, prioritizing time-sensitive transmissions to meet QoS requirements. The affiliated AP broadcasts the adjusted TID-SP schedule in the RTWT element carried in the beacon frame, enabling scheduled STAs belonging to non-AP MLDs to transmit time-sensitive or prioritized services in the TID-SP.

[0061] Exemplary computer control system

[0062] Figure 4 An exemplary wireless device 400 capable of implementing embodiments of the present invention is depicted. Embodiments of the present invention relate to wireless devices capable of performing transmissions in a wireless TSN according to embodiments of the present invention. The wireless device 400 can transmit and / or receive time-sensitive or prioritized user data in a TID-SP using trigger-based and / or EDCA-based transmission methods in a wireless network. Furthermore, the wireless device 400 can dynamically adjust and announce the scheduling of TID-SPs for trigger-based or EDCA-based transmissions according to the requirements of time-sensitive services and / or service load conditions, which can advantageously prioritize time-sensitive transmissions to meet QoS requirements.

[0063] Wireless device 400 includes a processor 405 for running software applications and optionally an operating system. Memory 410 may include read-only memory and / or random access memory, for example, to store applications and data (e.g., tables of indexed values) used by processor 405, as well as data received or transmitted by radio modules 415 and 420. Radio modules 415 and 420 may communicate with other electronic devices via a wireless network (e.g., WLAN) using multiple spatial streams (e.g., multiple antennas) and typically operate according to IEEE standards (e.g., IEEE 802.11ax, IEEE 802.11ay, IEEE 802.11be, etc.). Radio modules 415 and 420 may perform multilink operation, including multilink time-sensitive transmissions. According to embodiments, wireless device 400 may include more than two radio modules. For example, radio modules (e.g., radio modules 415 and 420) may be configured to transmit and / or receive data according to wireless transmission QoS requirements (e.g., service profiles). Wireless device 400 is a device that supports wireless TSN, which can be configured by a TSN configuration server and scheduled by the associated AP for wireless time-sensitive transmission.

[0064] Therefore, embodiments of the invention have been described. While the invention has been described in specific embodiments, it should be understood that the invention should not be construed as limited to these embodiments, but rather interpreted in accordance with the appended claims.

[0065] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for an access point (AP) multilink device (MLD) supporting wireless time-sensitive networking (TSN) to perform wireless data transmission via wireless TSN, characterized in that, The method includes: Schedule Service Identifier Service Hour (TID-SP) for time-sensitive transmission with Radio Station (STA) MLD; Send a beacon frame, wherein the Limited Target Wake-Time (RTWT) element in the beacon frame contains information about the TID-SP; and During the TID-SP, data is received from a STA belonging to the STA MLD; The scheduling of the TID-SP is adjusted according to requirements related to at least one of time-sensitive transmission and traffic load conditions; and The new schedule for the adjusted TID-SP is announced.

2. The method according to claim 1, characterized in that, The scheduling TID-SP includes scheduling TID-SPs for transmissions based on Enhanced Distributed Channel Access (EDCA).

3. The method according to claim 1, characterized in that, The scheduling TID-SP includes: scheduling TID-SPs for trigger-based (TB) transmissions.

4. The method according to claim 2, characterized in that, Also includes: The scheduling of TID-SPs for transmissions based on Enhanced Distributed Channel Access (EDCA) is dynamically changed.

5. The method according to claim 3, characterized in that, Also includes: Dynamically change the scheduling of TID-SPs used for trigger-based (TB) transmissions.

6. The method according to claim 1, characterized in that, Also includes: During the association process, receive an indication of RTWT TID-SP capability from the STA.

7. The method according to claim 1, characterized in that, Also includes: Receive a Target Wake-up Time (TWT) establishment request for establishing an RTWT SP for the TID, the TWT establishment request including SP type and TID information, wherein the SP type includes at least one of trigger-based transmission of the TID and enhanced distributed channel access (EDCA)-based transmission of the TID.

8. The method according to claim 1 or 7, characterized in that, Also includes: Send a Target Wake-up Time (TWT) setup response to confirm the Restricted Target Wake-up Time (RTWT) TID-SP, the TWT setup response including SP type, TID information and transmission parameters.

9. The method according to claim 1, characterized in that, Also includes: Prioritize time-sensitive transmission to meet Quality of Service (QoS) requirements.

10. The method according to claim 1, characterized in that, The information in the TID-SP includes: TID information for DL ​​or UL transmissions allowed in the TID-SP, and the access types allowed in the TID-SP.

11. A method for wireless data transmission via a wireless station (STA) multi-link device (MLD) through a wireless time-sensitive network (TSN), characterized in that, The method includes: Receive a beacon frame from the AP MLD, wherein the constrained target wake-up time (RTWT) element in the beacon frame includes information about the TID-SP, wherein the Service Identifier Service Period (TID-SP) is scheduled by the AP MLD for performing time-sensitive transmission; and Data is sent to the AP MLD during the TID-SP period; The data sent to the AP MLD during the TID-SP includes: Receive trigger frames in trigger-based TID-SP; Execute trigger-based (TB) responses; and Send a TB physical layer protocol data unit (PPDU) including a MAC service data unit (MSDU), wherein the TID corresponding to the MSDU is equal to the TID allowed in the TID-SP; Alternatively, sending data to the AP MLD during the TID-SP includes: Perform Enhanced Distributed Channel Access (EDCA) or EDCA with priority access to obtain the wireless medium of the wireless network; and Send a PPDU including a MAC Service Data Unit (MSDU), wherein the TID corresponding to the MSDU is equal to the TID allowed in the TID-SP.

12. The method as described in claim 11, characterized in that, Also includes: During the association process, an indication of RTWT TID-SP capability is sent to the AP.

13. The method according to claim 11, characterized in that, Also includes: Send a Target Wake Time (TWT) setup request for establishing a RTWT SP for a TID, the TWT setup request including: SP type and TID information, wherein the SP type includes at least one of the following: trigger-based transmission of the TID; The TID is based on Enhanced Distributed Channel Access (EDCA) transmission.

14. The method according to claim 11, characterized in that, Also includes: Receive a Target Wake-up Time (TWT) setup response to confirm the Restricted Target Wake-up Time (RTWT) TID-SP, the TWT setup response including: SP type, TID information and transmission parameters.

15. The method according to claim 11, characterized in that, Sending data to the AP MLD during the TID-SP includes: Execute Enhanced Distributed Channel Access with Priority Access (EDCA) for channel access; and Send a PPDU including a MAC Service Data Unit (MSDU), wherein the MSDU has a TID allowed by the TID-SP, wherein the TID-SP is not scheduled for the STA belonging to the STA MLD.

16. An apparatus for wireless access point (AP) multilink devices (MLDs) to transmit wireless data via a wireless time-sensitive network (TSN), characterized in that, The device includes: processor; A memory, coupled to the processor, is used to store data; and Multiple radio modules for performing wireless TSN transmissions, and wherein the processor is operable to: Schedule Service Identifier Service Hour (TID-SP) for performing time-sensitive transmissions with Radio Station (STA) MLDs; Send a beacon frame, wherein the Target Wake-up Time (TWT) element in the beacon frame includes information about the TID-SP; and Data is received from STA MLD during the TID-SP period; The scheduling of the TID-SP is adjusted according to requirements related to at least one of time-sensitive transmission and traffic load conditions; and The new schedule for the adjusted TID-SP is announced.

17. The apparatus according to claim 16, characterized in that, The processor is also used for: The scheduling of the TID-SP used for Enhanced Distributed Channel Access (EDCA) transmission is dynamically changed.

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