[go: up one dir, main page]

WO2025148646A1 - Procédé et appareil de transmission de données basés sur une transmission préemptive - Google Patents

Procédé et appareil de transmission de données basés sur une transmission préemptive

Info

Publication number
WO2025148646A1
WO2025148646A1 PCT/CN2024/140614 CN2024140614W WO2025148646A1 WO 2025148646 A1 WO2025148646 A1 WO 2025148646A1 CN 2024140614 W CN2024140614 W CN 2024140614W WO 2025148646 A1 WO2025148646 A1 WO 2025148646A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
communication device
llr
preemption
frequency band
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/140614
Other languages
English (en)
Chinese (zh)
Inventor
王小超
张禹
胡晓通
凌学梦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2025148646A1 publication Critical patent/WO2025148646A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Definitions

  • the embodiments of the present application relate to the field of wireless communication technology, and more specifically, to a method and device for data transmission based on preemptive transmission.
  • WLAN wireless local area network
  • TXOP transmit opportunity
  • WLAN devices can obtain TXOP to transmit data through the channel access process, where the WLAN device can be an access point (AP) or a station (STA).
  • AP access point
  • STA station
  • the WLAN device that obtains TXOP is called the TXOP holder and can transmit its own services within the duration of TXOP. This avoids competition to a certain extent and ensures the stability of the TXOP holder's transmission services. Under the TXOP transmission mechanism, non-TXOP holders need to wait until the TXOP time of the TXOP holder ends before they can compete for the channel, which will increase the service latency of the non-holders. When the non-holder's service is a low-latency service or the holder's TXOP time is long, the impact on the non-holder's service is more serious.
  • the existing preemptive transmission mechanism is not flexible enough, which may cause non-holders to always be unable to preempt TXOP or the holders to always have their TXOP preempted, thus affecting the service transmission of the WLAN device.
  • the embodiments of the present application provide a method and device for data transmission based on preemptive transmission, which can optimize the mechanism of preemptive transmission.
  • a method for data transmission based on preemptive transmission comprising: sending a low latency request (LLR) frame to a first communication device, the LLR frame being used to request to preempt a transmission opportunity TXOP held by the first communication device; receiving a first preemption confirmation frame, the first preemption confirmation frame being used to indicate successful preemption; and performing data transmission within the TXOP.
  • LLR low latency request
  • the first preemption confirmation frame includes preemption confirmation information, and the preemption confirmation information is used to indicate whether the preemption is successful.
  • the first preemption confirmation frame includes LLR RU allocation information
  • the resource block RU (resource units) in the LLR RU allocation information is a frequency band used by the second communication device to send LLR frames.
  • the solution provided by the embodiment of the present application is that the communication device that initiates the low-latency service request determines that the second communication device corresponding to the RU is preempted successfully through the RU in the LLR RU allocation information contained in the first preemption confirmation frame, thereby optimizing the preemption transmission mechanism.
  • the non-holder receives the second preemption confirmation frame, and the LLR reception information contained in the second preemption confirmation frame can indicate whether the LLR frame is successfully received. In this way, when the LLR frame reception fails, the non-holder can obtain an indication of the LLR frame reception failure.
  • the second preemption confirmation frame also includes retransmission information
  • the second preemption confirmation frame is a broadcast frame
  • the retransmission information is used to indicate that the LLR frame is sent again.
  • the retransmission information contained in the second preemption confirmation frame can instruct the non-holder to initiate preemption again by broadcasting, so that when the LLR frame reception fails, the non-holder can re-preempt according to the retransmission information.
  • the retransmission information can also clarify the timing for the non-holder to re-preempt, thereby optimizing the preemptive transmission mechanism.
  • the third preemption confirmation frame can instruct the access point AP to schedule data transmission. Therefore, when the non-holder and TXOP holder who are allowed to obtain the transmission opportunity are both site STA, the AP can schedule the data transmission service according to the service information such as the priority of different data services and/or the expected duration of channel occupation, so that the transmission of the service can be more reasonable, thereby optimizing the mechanism of preemptive transmission.
  • the third preemption confirmation frame includes trigger object information, and the trigger object information is used to indicate whether the AP's data transmission scheduling includes scheduling data transmission of the first communication device.
  • the third preemption confirmation frame also includes confirmation information, where the confirmation information is used to instruct the AP to perform data transmission within the TXOP.
  • the first preemption confirmation frame is a clear to send (CTS) frame sent by the first communication device.
  • CTS clear to send
  • sending an LLR frame to the first communication device includes: sending an aggregate frame to the first communication device, the aggregate frame including information of the LLR frame and block acknowledgment BA (block acknowledgment) information, the BA information corresponding to data transmitted by the first communication device to the second communication device.
  • BA block acknowledgment
  • a first communication device transmits data to a second communication device. After receiving the data, the second communication device needs to send a BA frame to the first communication device.
  • the second communication device sends an aggregate frame to the first communication device.
  • the aggregate frame includes information of the LLR frame and BA information. This can increase the density of effective information in the sent frames, reduce the number of frame transmissions, and improve the efficiency of preemptive transmission, thereby optimizing the mechanism of preemptive transmission.
  • sending an LLR frame to a first communication device includes: sending an LLR frame to the first communication device on a first frequency band, the first frequency band being a frequency band randomly selected from a plurality of candidate frequency bands, or the first frequency band being a frequency band corresponding to a second communication device among a plurality of candidate frequency bands.
  • the non-holder randomly selects the first frequency band from multiple candidate frequency bands to send a low-latency service request frame.
  • the needs of preemptive transmission and the effective use of spectrum resources can be met without knowing how many users participate in the preemption, thereby improving the utilization rate of frequency band resources; or, the non-holder uses the corresponding frequency band when sending a low-latency service request frame, so that the low-latency service request frames sent by different non-holders will not collide on the first frequency band, thereby increasing the probability of the low-latency service request frame sent by the non-holder being successfully received, which can avoid the failure of preemptive TXOP caused by collision between low-latency service request frames, thereby optimizing the mechanism of preemptive transmission.
  • the AP negotiates with the STA for resources of a first frequency band and a second frequency band, wherein the second frequency band is used to send and/or receive BA frames.
  • the solution provided by the embodiment of the present application is that the AP and the STA pre-negotiate the allocation result of the frequency band resources and use the frequency band according to the negotiation result. This can clarify the frequency band used by the second communication device to initiate preemption and the communication device to send and/or receive BA frames, thereby optimizing the mechanism of preempting transmission.
  • the resources of the first frequency band include resources of the second frequency band.
  • the LLR frame includes indication information, and the indication information is used to indicate whether the LLR frame carries buffer status report (buffer state report, BSR) information.
  • buffer status report buffer state report
  • different non-holders may carry or not carry their own BSRs when sending low-latency service request frames.
  • the indication information in the LLR frame indicates that the BSR is carried
  • the low-latency service request frame sent by the non-holder carries its own BSR, which allows the AP to obtain the BSR of the non-holder and perform data transmission service scheduling without sending a cache status report query. This can simplify the process of preempting transmission, shorten the time required for data transmission service scheduling, and thus optimize the mechanism of preempting transmission.
  • the LLR frame includes receiving address information, and the receiving address is an address of the first communication device.
  • the frame structure of the LLR frame allows a non-holder to make a TXOP preemption request by sending an LLR frame, so that all communication devices in the service set can participate in the preemptive transmission, which can expand the application scope of the preemptive transmission and optimize the preemptive transmission mechanism.
  • sending the LLR frame to the first communication device includes: sending the LLR frame to the first communication device within a short inter-frame space (SIFS) time after the first communication device sends a data packet.
  • SIFS short inter-frame space
  • a non-holder can only send an LLR frame within the SIFS time after the holder sends a data packet, so as to avoid other non-holders from initiating continuous preemption of the holder's TXOP after the non-holder who successfully preempts sends a data packet.
  • the data transmission of the TXOP holder can be guaranteed, and frequent channel contention within a certain period of time can be avoided, thereby optimizing the mechanism of preemptive transmission.
  • the second communication device before sending the LLR frame to the first communication device, the second communication device detects that the signal strength of the first communication device is higher than a threshold.
  • the non-holder initiates TXOP preemption only after detecting that the signal strength of the holder is higher than a threshold, and the threshold is the signal threshold when the non-holder and the holder are hidden terminals. This can avoid data transmission service errors caused by TXOP preemption when the non-holder and the holder are hidden terminals, thereby optimizing the mechanism of preemptive transmission.
  • a method for data transmission based on preemptive transmission including: receiving and/or detecting a low-latency service request LLR frame sent by a second communication device, the LLR frame being used by the second communication device to request to preempt a transmission opportunity TXOP held by the first communication device; and sending a first preemption confirmation frame to the second communication device, the first preemption confirmation frame being used to indicate that the second communication device has successfully preempted.
  • the first preemption confirmation frame includes preemption confirmation information, and the preemption confirmation information is used to indicate whether the preemption is successful.
  • the holder sends a first preemption confirmation frame, which clearly indicates that the communication device that expects to preempt the TXOP has successfully preempted the TXOP, making the indication of successful transmission opportunity preemption clearer, thereby optimizing the mechanism of preempting transmission.
  • the first preemption confirmation frame includes LLR RU allocation information
  • the RU in the LLR RU allocation information is the frequency band used by the second communication device to send the LLR frame.
  • the RU in the LLR RU allocation information contained in the first preemption confirmation frame is the frequency band used when the non-holder who is allowed to obtain the transmission opportunity initiates preemption. This enables the holder to allow the non-holder of the corresponding frequency band to obtain the transmission opportunity through the LLR RU allocation information in the first preemption confirmation frame, thereby optimizing the mechanism of preempting transmission.
  • the method also includes: sending a second preemption confirmation frame to the second communication device, the second preemption confirmation frame includes LLR reception information, and the LLR reception information is used to indicate whether the LLR frame sent by the second communication device is successfully received.
  • the holder sends a second preemption confirmation frame.
  • the LLR reception information contained in the second preemption confirmation frame can indicate whether the LLR frame is successfully received. In this way, when the LLR frame reception fails, the non-holder can obtain an indication of the LLR frame reception failure.
  • the second preemption confirmation frame also includes retransmission information
  • the second preemption confirmation frame is a broadcast frame
  • the retransmission information is used to instruct the second communication device to send the LLR frame again.
  • the retransmission information contained in the second preemption confirmation frame can instruct the non-holder to initiate preemption again by broadcasting, so that when the LLR frame reception fails, the non-holder can re-preempt according to the retransmission information.
  • the retransmission information can also clarify the timing for the non-holder to re-preempt, thereby optimizing the preemptive transmission mechanism.
  • the method also includes: sending a third preemption confirmation frame to the access point AP, wherein the first communication device and the second communication device are stations STA, and the first preemption confirmation frame is a trigger frame TF sent by the AP based on the third preemption confirmation frame.
  • the third preemption confirmation frame can instruct the access point AP to schedule data transmission. Therefore, when the non-holder and TXOP holder who are allowed to obtain the transmission opportunity are both site STA, the AP can schedule the data transmission service according to the service information such as the priority of different data services and/or the expected duration of channel occupation, so that the transmission of the service can be more reasonable, thereby optimizing the mechanism of preemptive transmission.
  • the third preemption confirmation frame includes trigger object information, and the trigger object information is used to indicate whether the AP's data transmission scheduling includes scheduling data transmission of the first communication device.
  • the trigger object information contained in the third preemption confirmation frame can indicate whether the access point AP needs to schedule the data transmission service of the scheduling holder when performing data transmission scheduling. This can meet the data transmission scheduling in different situations, improve the flexibility of preemption transmission, and thus optimize the mechanism of preemption transmission.
  • the third preemption confirmation frame also includes confirmation information, where the confirmation information is used to instruct the AP to perform data transmission within the TXOP.
  • the third preemption confirmation frame can instruct the access point AP to perform data transmission scheduling, and the AP performs downlink data transmission according to the confirmation information contained in the third preemption confirmation frame sent by the holder STA, thereby realizing the downlink data transmission and uplink service scheduling of the AP. In this way, it can meet the situation where both the AP and the STA that does not hold the TXOP preempt the transmission opportunity of the holder STA and perform data transmission, thereby optimizing the mechanism of preempting transmission.
  • the first preemption confirmation frame is a clear-to-send CTS frame sent by the first communication device.
  • receiving and/or detecting an LLR frame sent by the second communication device includes: receiving and/or detecting an aggregate frame sent by the second communication device, the aggregate frame including information of the LLR frame and block confirmation BA information, the BA information corresponding to data transmitted by the first communication device to the second communication device.
  • a first communication device transmits data to a second communication device. After receiving the data, the second communication device needs to send a BA frame to the first communication device.
  • the second communication device sends an aggregate frame to the first communication device.
  • the aggregate frame includes information of the LLR frame and BA information. This can increase the density of effective information in the sent frames, reduce the number of frame transmissions, and improve the efficiency of preemptive transmission, thereby optimizing the mechanism of preemptive transmission.
  • receiving and/or detecting the LLR frame sent by the second communication device includes: receiving and/or detecting the LLR frame sent by the second communication device on a first frequency band, the first frequency band being a frequency band randomly selected from multiple candidate frequency bands, or the first frequency band being a frequency band corresponding to the second communication device among multiple candidate frequency bands.
  • the holder receives and/or detects that the frequency band of the LLR frame is the frequency band used by the non-holder to send the LLR frame, and the non-holder randomly selects a first frequency band from multiple candidate frequency bands to send a low-latency service request frame.
  • the needs of preemptive transmission and the effective use of spectrum resources are met without knowing how many users participate in the preemption, so that the utilization rate of frequency band resources is improved; or, the non-holder uses the corresponding frequency band when sending the low-latency service request frame, so that the low-latency service request frames sent by different non-holders will not collide on the first frequency band, thereby increasing the probability of the low-latency service request frame sent by the non-holder being successfully received, so that the failure of preemption of TXOP caused by collision between low-latency service request frames can be avoided, thereby optimizing the mechanism of preemptive transmission.
  • the AP negotiates with the STA on resources of a first frequency band and a second frequency band, wherein the second frequency band is used to send and/or receive BA frames.
  • the solution provided by the embodiment of the present application is that the AP and the STA pre-negotiate the allocation result of the frequency band resources and use the frequency band according to the negotiation result. This can clarify the frequency band used by the second communication device to initiate preemption and the communication device to send and/or receive BA frames, thereby optimizing the mechanism of preempting transmission.
  • the resources of the first frequency band include resources of the second frequency band.
  • the resources of the second frequency band and the first frequency band are set to resources with overlapping parts, which can improve the utilization rate of the frequency band resources and thus optimize the mechanism of preempting transmission.
  • the LLR frame includes indication information, where the indication information is used to indicate whether the LLR frame carries BSR information.
  • different non-holders may carry or not carry their own BSRs when sending low-latency service request frames.
  • the indication information in the LLR frame indicates that the BSR is carried
  • the low-latency service request frame sent by the non-holder carries its own BSR, which allows the AP to obtain the BSR of the non-holder and perform data transmission service scheduling without sending a cache status report query. This can simplify the process of preempting transmission, shorten the time required for data transmission service scheduling, and thus optimize the mechanism of preempting transmission.
  • the solution provided in the embodiment of the present application is that the holder confirms whether there is a non-holder initiating a preemption request by detecting the energy of multiple candidate frequency bands, and the transmission opportunity preemption can be performed even when the holder and the non-holder cannot interact with each other through control frames. This can expand the application scope of preemptive transmission, thereby optimizing the preemptive transmission mechanism.
  • the LLR frame includes receiving address information, and the receiving address is an address of the first communication device.
  • the frame structure of the LLR frame allows a non-holder to make a TXOP preemption request by sending an LLR frame, so that all communication devices in the service set can participate in the preemptive transmission, which can expand the application scope of the preemptive transmission and optimize the preemptive transmission mechanism.
  • the first communication device before receiving and/or detecting the LLR frame sent by the second communication device, the first communication device detects that the signal strength of the second communication device is higher than a threshold.
  • the solution provided by the embodiment of the present application is that the holder receives and/or detects the LLR frame only after detecting that the signal strength of the non-holder is higher than a threshold, and the threshold is the signal threshold when the non-holder and the holder are hidden terminals. This can avoid data transmission service errors caused by TXOP preemption when the non-holder and the holder are hidden terminals, thereby optimizing the mechanism of preemptive transmission.
  • a method for data transmission based on preemptive transmission comprising: sending a low-latency service request LLR frame to a first communication device on a first frequency band, the LLR frame being used by a second communication device to request preemption of a transmission opportunity TXOP held by the first communication device, the first frequency band being a frequency band randomly selected from a plurality of candidate frequency bands, or the first frequency band being a frequency band corresponding to the second communication device among a plurality of candidate frequency bands.
  • the non-holder randomly selects the first frequency band from multiple candidate frequency bands to send a low-latency service request frame.
  • the non-holder uses the corresponding frequency band when sending a low-latency service request frame, so that the low-latency service request frame will not collide on the first frequency band, thereby increasing the probability of the low-latency service request frame sent by the non-holder being successfully received, which can avoid the failure of preempting TXOP caused by collision between low-latency service request frames, thereby optimizing the mechanism of preemptive transmission.
  • the solution provided by the embodiment of the present application is that the AP and the STA pre-negotiate the allocation result of the frequency band resources and use the frequency band according to the negotiation result. This can clarify the frequency band used by the second communication device to initiate preemption and the communication device to send and/or receive BA frames, thereby optimizing the mechanism of preempting transmission.
  • the resources of the second frequency band and the first frequency band are set to resources with overlapping parts, which can improve the utilization rate of the frequency band resources and thus optimize the mechanism of preempting transmission.
  • the apparatus includes: a sending unit and a receiving unit.
  • the sending unit is used to send a low-latency service request LLR frame and data transmission, the LLR frame is used to request to preempt a transmission opportunity TXOP held by the first communication device;
  • the receiving unit is used to receive a first preemption confirmation frame, the first preemption confirmation frame is used to indicate that the preemption is successful.
  • the apparatus further includes: an execution unit, the execution unit being configured to determine whether the second communication device has been preempted successfully based on the RU in the LLR RU allocation information in the first preemption confirmation frame.
  • the receiving unit is further used to receive a second preemption confirmation frame sent by the first communication device.
  • the sending unit is further used to send an aggregate frame, the aggregate frame includes information of the LLR frame and block confirmation BA information, and the BA information corresponds to data transmitted from the first communication device to the second communication device.
  • the execution unit is further used to: randomly select a first frequency band from multiple candidate frequency bands for sending the LLR frame to the first communication device.
  • the execution unit is further used to: detect the signal strength of the first communication device.
  • a data transmission device comprising modules or units for executing the method in any one of the first to third aspects and any possible implementation thereof.
  • the sending unit is further used to send a second preemption confirmation frame
  • the second preemption confirmation frame includes LLR reception information
  • the LLR reception information is used to indicate whether the LLR frame sent by the second communication device is successfully received.
  • FIG19 is a schematic diagram of another possible data transmission device provided in an embodiment of the present application.
  • FIG20 is a schematic diagram of a possible communication device provided in an embodiment of the present application.
  • a user station (STA) in a WLAN can be called a workstation, system, user unit, access terminal, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, user device or user equipment (UE).
  • the STA can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless local area network (such as Wi-Fi) communication capabilities, a wearable device, a computing device, or other processing device connected to a wireless modem.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • FIG2 shows the internal structure of an AP product, wherein the AP can be multi-antenna or single-antenna.
  • the AP includes a physical layer (PHY) processing circuit and a media access control (MAC) layer processing circuit.
  • the physical layer processing circuit can be used to process physical layer signals
  • the MAC layer processing circuit can be used to process MAC layer signals.
  • STA products are usually terminal products that support the 802.11 series standards, such as mobile phones, laptops, etc.
  • Figure 3 shows a STA structure diagram with a single antenna.
  • STA can also be a multi-antenna device, and can be a device with more than two antennas.
  • STA can include a PHY layer processing circuit and a MAC layer processing circuit.
  • the physical layer processing circuit can be used to process physical layer signals
  • the MAC layer processing circuit can be used to process MAC layer signals.
  • TXOP Transmit opportunity
  • Transmission opportunity is an important concept introduced in the 802.11 protocol.
  • Communication devices obtain TXOP through the channel access process.
  • Communication devices that obtain TXOP can transmit data frames, control frames, management frames, and receive response frames during the duration of TXOP.
  • the transmission opportunity mechanism can ensure that the holder of TXOP avoids competing for channels with other communication devices during the duration of its TXOP and achieves stable transmission of services. Based on this, non-holders of TXOP need to wait until the holder's TXOP time ends before they can re-compete for channels to transmit data, which obviously increases the service delay of non-holders. When the non-holder's service is a low-latency service or the holder's TXOP time is long, the non-holder's service is more seriously affected.
  • Non-holders can preempt the opportunity to obtain transmission services within the TXOP duration of the holder to meet the needs of low latency or higher priority services.
  • IFS Inter-frame space
  • IEEE 802.11 stipulates that after all stations have completed sending, they must wait for a time interval before sending the next frame. This time interval is called the inter-frame interval.
  • the length of the inter-frame interval can depend on the type of data frame that the station intends to send. For example, high-priority frames need to wait for a shorter time, so they can get priority to send, while low-priority frames need to wait for a longer time.
  • the following introduces several common inter-frame intervals in wireless LANs.
  • Short inter-frame space is the shortest inter-frame space, which is used to separate different frames belonging to a session.
  • a communication device should be able to switch from sending mode to receiving mode within the short inter-frame space.
  • the types of short inter-frame space include ACK (acknowledge character), CDS frames, fragmented data frames, all frames that answer AP probes and data frames sent by access point AP in point coordination function mode.
  • Partial inter-frame space (PIFS): The partial inter-frame space is slightly longer than the short inter-frame space.
  • PIFS Partial inter-frame space
  • DIFS Distributed inter-frame space
  • FIG4 shows a possible preemptive transmission process when the holder of TXOP is AP.
  • AP is the holder of the current TXOP.
  • AP sends a request to send (RTS) frame to the target transmission communication device (e.g., STA1).
  • RTS request to send
  • STA1 sends a clear to send (CTS) frame to AP.
  • CTS clear to send
  • AP sends a data packet to STA1 downlink, and the longer non-low-latency packet is interrupted into multiple packets, with the interval between each packet being PIFS.
  • TXOP time interval required for AP to send the next data packet is PIFS (PIFS time length>SIFS time length), at this time, STA2 sending an LLI frame to AP will not cause a frame collision with the next data packet.
  • PIFS PIFS time length>SIFS time length
  • STA2 sending an LLI frame to AP will not cause a frame collision with the next data packet.
  • the AP sends a trigger frame (trigger frames, TF), obtains the BSR of other communication devices and schedules the service transmission of different communication devices.
  • the TF sent by the AP instructs STA2 to transmit the service.
  • the AP replies with a block acknowledgment (BA) frame, and the preemptive transmission ends.
  • BA block acknowledgment
  • the AP sends the BA frame for SIFS time, it continues to transmit the previously untransmitted service to STA1.
  • STA1 replies with a BA frame to the AP.
  • STA3 can initiate a preemption request within the SIFS time after STA2 sends a data packet, so as to achieve continuous preemption of the AP's TXOP.
  • FIG5 shows a possible preemption transmission process when the holder of TXOP is STA.
  • STA1 is the holder of TXOP.
  • STA1 sends an RTS frame to the target transmission communication device AP to request transmission.
  • AP sends a CTS frame to STA1 to indicate that transmission is allowed.
  • STA1 sends a data packet to AP uplink.
  • the AP in the service set wants to preempt TXOP to transmit services, it can initiate a preemption request within the SIFS time after STA1 sends a physical layer protocol data unit (PPDU), or directly send downlink services within the SIFS time after STA1 sends a PPDU.
  • PPDU physical layer protocol data unit
  • AP can send a preemption request (PR) frame to STA1 as the AP's preemption request.
  • PR preemption request
  • STA2 replies with a BA frame.
  • AP indicates to STA1 that the preemption has ended, and STA1 continues to transmit services to AP.
  • the PPDU sent by STA1 is not divided into multiple small packets, so the AP needs to reply with a BA frame after receiving each PPDU.
  • the AP wants to preempt the TXOP, it can aggregate the PR frame in the BA frame.
  • the PPDU sent by STA1 is divided into multiple small packets, so the AP needs to reply with a BA frame only after all the multiple small packets that have been interrupted are received.
  • AP When AP is the holder of TXOP, if multiple STAs initiate preemption requests at the same time, the frames of multiple preemption requests may collide, and the collided frames cannot be decoded.
  • all STAs in the same service set can participate in preemption, but when STA is the holder of TXOP, only AP can initiate preemption, and other STAs with more numbers than AP cannot participate in preemption, which limits the application scope of preemptive transmission.
  • STA when STA is the holder of TXOP, AP will directly transmit the service after sending the TXOP preemption request.
  • the STA holding TXOP cannot refuse the AP's preemption, which is likely to disrupt the normal service transmission of the holder STA.
  • the design of the TXOP mechanism is to hope that the holder of TXOP can avoid channel competition within a certain period of time and ensure the business transmission of the holder. If frequent TXOP preemption is performed within the holder's TXOP, it violates the original design purpose of TXOP and cannot achieve the expected technical effect.
  • the present application provides a method and device for data transmission based on preemptive transmission, which optimizes the mechanism of preemptive transmission and improves the flexibility and application scope of preemptive transmission by indicating whether the preemptor can preempt transmission by the TXOP holder.
  • the method and device for data transmission based on preemptive transmission provided by the present application will be described in detail below in conjunction with the accompanying drawings.
  • the embodiments shown below do not particularly limit the specific structure of the execution subject of the method provided in the embodiments of the present application.
  • the execution subject of the method provided in the embodiments of the present application can be a transceiver device, or a functional module in the transceiver device that can call and execute the program.
  • the first, second and various numerical numbers (e.g., "No. 1", “No. 2", “No. 3”, etc.) shown in the present application are only for convenience of description and are used to distinguish objects, and are not used to limit the scope of the embodiments of the present application. For example, to distinguish different frequency bands, etc. It is not used to describe a specific order or sequence. It should be understood that the objects described in this way can be interchanged where appropriate so as to be able to describe solutions other than the embodiments of the present application.
  • FIG. 7 shows another possible preemptive transmission process when the holder of the TXOP is a STA.
  • the holder of the TXOP can carry indication information in the data packet it sends to indicate whether other communication devices are allowed to preempt the TXOP after the transmission of this PPDU is completed.
  • STA1 competes for the transmission opportunity through backoff competition, STA1 sends an RTS frame to request transmission.
  • the RTS frame carries information that informs the AP and other STAs in the BSS that this TXOP is allowed to be preempted.
  • the AP After receiving the RTS frame, the AP sends a CTS frame to STA1 to allow STA1 to transmit services.
  • Figure 8 is a frame format of a preemption confirmation frame (PA) provided in an embodiment of the present application.
  • PA preemption confirmation frame
  • the first preemption confirmation frame includes preemption confirmation information, and the preemption confirmation information is used to indicate whether the preemption is successful.
  • the holder sends a first preemption confirmation frame, or the non-holder transmits data after receiving the first preemption confirmation frame containing preemption confirmation information.
  • the first preemption confirmation frame clearly indicates that the communication device that expects to preempt the TXOP has successfully preempted the TXOP, making the indication of successful transmission opportunity preemption clearer, thereby optimizing the mechanism of preempting transmission.
  • a non-holder initiates a low-latency service request and can transmit data only after obtaining a preemption confirmation frame sent by the TXOP holder. This enables the TXOP holder to decide whether to agree to the preemption of the non-holder and ensure the data transmission of the holder, thereby optimizing the preemption transmission mechanism.
  • the preemptor STA1 sends an LLR frame to request a low-latency service, and the holder STA2 replies with a first preemption confirmation frame to indicate that the preemptor STA1 has successfully preempted.
  • the receiving address of the first preemption confirmation frame can be the address of STA1 or a broadcast address that can be received by all communication devices in the service set.
  • the first preemption confirmation frame includes LLR RU allocation information, and the RU in the LLR RU allocation information is the frequency band used by STA1, which is allowed to obtain the transmission opportunity, to send the LLR frame.
  • the RU in the LLR RU allocation information contained in the first preemption confirmation frame is the frequency band used when the non-holder who is allowed to obtain the transmission opportunity initiates preemption. This enables the holder to allow the non-holder of the corresponding frequency band to obtain the transmission opportunity through the LLR RU allocation information in the first preemption confirmation frame, thereby optimizing the mechanism of preempting transmission.
  • the method further comprises the following optional steps:
  • the preemptor sends an LLR frame to request a low-latency service
  • the holder STA2 replies with a first preemption confirmation frame to indicate that the preemptor has successfully preempted
  • the RU in the LLR RU allocation information of the first preemption confirmation frame is the frequency band used by STA1, which is allowed to obtain the transmission opportunity, to send the LLR frame.
  • the LLR RU allocation information of the first preemption confirmation frame indicates that the STA1 corresponding to the RU has successfully preempted.
  • the communication device receiving the first preemption confirmation frame determines whether the preemption is successful based on the RU in the LLR RU allocation information.
  • the communication device When the frequency band used by the communication device receiving the first preemption confirmation frame to send the LLR frame matches the RU in the LLR RU allocation information, the communication device confirms that it has successfully preempted; when the frequency band used by the communication device receiving the first preemption confirmation frame to send the LLR frame does not match the RU in the LLR RU allocation information, the communication device confirms that other communication devices have successfully preempted.
  • the solution provided by the embodiment of the present application is that the communication device that initiates the low-latency service request determines that the second communication device corresponding to the RU is preempted successfully through the RU in the LLR RU allocation information contained in the first preemption confirmation frame, thereby optimizing the preemption transmission mechanism.
  • the method further comprises the following optional steps:
  • step S650 may be executed before S610 or between S610 and S620; the frame structure of the second preemption confirmation frame may be partially identical to or completely different from the frame structure of the first preemption confirmation frame, and this is not limited.
  • the second communication device that expects to preempt the transmission opportunity sends a low-latency service request LLR frame, and the second communication device receives the second preemption confirmation frame sent by the first communication device.
  • the LLR reception information in the second preemption confirmation frame indicates whether the LLR frame sent by the second communication device is successfully received.
  • the LLR reception information of the second preemption confirmation frame can be 1 or 0, where 1 is used to indicate successful reception and 0 is used to indicate reception failure; or, 0 is used to indicate successful reception and 1 is used to indicate reception failure.
  • the RA address of the second preemption confirmation frame can be set to the receiving address of the second communication device, or it can be set to a broadcast address for notifying other communication devices other than those holding the transmission opportunity of the failure to receive the LLR frame, so that the communication device can obtain information about the failure of the TXOP holder to receive the LLR frame.
  • the embodiments of the present application do not limit the specific form or value of the LLR reception information.
  • the holder sends a second preemption confirmation frame, or the non-holder receives the second preemption confirmation frame.
  • the LLR reception information contained in the second preemption confirmation frame can indicate whether the LLR frame is successfully received. In this way, when the LLR frame reception fails, the non-holder can obtain an indication of the LLR frame reception failure.
  • the second communication device receives a second preemption confirmation frame for instructing to re-initiate a low-latency service request, and the retransmission information in the second preemption confirmation frame instructs the second communication device to initiate preemption again.
  • the second preemption confirmation frame sent by the first communication device to the second communication device contains LLR reception information indicating that the LLR frame reception failed and retransmission information indicating that the second communication device initiates a preemption request again.
  • the second communication device can immediately initiate preemption again according to the indication of the retransmission information, or wait for the first communication device to transmit the next PPDU before initiating preemption again.
  • the retransmission information of the second preemption confirmation frame received by the second communication device can be 1 or 0.
  • 1 is used to indicate to initiate preemption again immediately, and 0 is used to indicate to wait for the first communication device to transmit the next PPDU before initiating preemption again; or, 1 is used to indicate to wait for the first communication device to transmit the next PPDU before initiating preemption again, and 0 is used to indicate to initiate preemption again immediately.
  • the embodiments of the present application do not limit the specific form or value of the retransmission information.
  • FIG9 shows another possible preemptive transmission process when the holder of the TXOP is a STA.
  • the AP in the BSS is associated with at least three STAs, namely STA1, STA2 and STA3.
  • STA1 as the holder of the TXOP, transmits uplink low-latency services to the AP, and the AP needs to reply with a BA frame immediately after receiving each PPDU.
  • STA1 competes for the transmission opportunity through backoff competition, STA1 sends an RTS frame to request transmission.
  • the RTS frame carries information that informs the AP and other STAs in the BSS that this TXOP is allowed to be preempted.
  • the AP After receiving the RTS, the AP sends a CTS frame to STA1 to allow STA1 to transmit services.
  • STA1 sends low-latency data
  • STA2 and STA3 have low-latency services arriving.
  • STA2 and STA3 send LLR frames in candidate frequency bands outside the preset BA frame frequency band, and STA2 and STA3 both use frequency band 3 to send LLR frames.
  • STA1 receives the BA frame from the AP on the main channel and detects a collision frame in the agreed frequency band (for example, by identifying the preamble code, it is determined that a frame collision has occurred). STA1 fails to parse the collision frame.
  • STA1 when STA1 holds TXOP, STA2 and AP send low-latency service request frames to preempt, and STA1 sends a third preemption confirmation frame containing confirmation information and trigger information to AP.
  • AP can perform downlink service transmission and uplink schedule services of other STAs based on the third preemption confirmation frame. For example, AP performs downlink service transmission and sends a trigger frame to STA2, and STA2 preempts transmission after receiving the trigger frame sent by AP.
  • AP can first send downlink services and then trigger STA2 to perform data transmission, or AP can first trigger STA2 to perform data transmission and then send downlink services.
  • the AP After receiving the third preemption confirmation frame, the AP first sends a downlink low-latency service, and then sends a BSRP frame to query the service status of each STA.
  • STA1 and STA2 report BSR information, and the AP performs Trigger scheduling based on the reported BSR, and each STA transmits services according to the AP's scheduling.
  • the AP replies with a BA frame, and the preemptive transmission is completed.
  • the third preemption confirmation frame can instruct the access point AP to schedule data transmission, and the non-holder STA receives the TF triggered by the AP according to the third preemption confirmation frame sent by the holder STA to perform data transmission, and the AP can perform downlink data transmission according to the confirmation information contained in the third preemption confirmation frame sent by the holder STA, thereby realizing the downlink data transmission and uplink service scheduling of the AP, which can meet the situation where both the AP and the non-holding TXOP STA preempt the transmission opportunity of the holder STA and perform data transmission, thereby optimizing the mechanism of preemptive transmission.
  • the LLR frame when sending the LLR frame to the first communication device in the above step S610, the LLR frame may be sent to the first communication device on a first frequency band, or, when receiving and/or detecting the LLR frame sent by the second communication device, the LLR frame sent by the second communication device may be received and/or detected on the first frequency band.
  • the first frequency band may be a frequency band randomly selected from a plurality of candidate frequency bands, or the first frequency band may be a frequency band corresponding to the second communication device among the plurality of candidate frequency bands.
  • the second communication device when the second communication device initiates preemption of TXOP, it sends an LLR frame to the first communication device on the first frequency band, and the first frequency band used is a frequency band randomly selected by the second communication device from multiple candidate frequency bands, or the first frequency band is a frequency band among multiple candidate frequency bands that has a corresponding relationship with the second communication device.
  • the AP and STA in the same service set divide the available spectrum resources into N candidate frequency bands based on the number of associated STAs, where N is a positive integer greater than or equal to 1.
  • N is a positive integer greater than or equal to 1.
  • the spectrum resources can be divided into more frequency bands; when the number of STAs is small, the spectrum resources can be divided into fewer frequency bands to make the bandwidth of the frequency band larger.
  • a larger frequency band bandwidth can speed up the transmission of LLR frames.
  • the first frequency band used by the second communication device to send a preemption request to the first communication device can be randomly selected from the candidate frequency bands. As shown in FIG13, FIG13 shows another possible preemption transmission process when the holder of the TXOP is an AP.
  • the data is not divided into small packets, so after STA1 receives the data, it needs to send a BA frame to AP for confirmation within SIFS time.
  • AP low-latency data frames
  • STA2 and STA3 hope to seize TXOP for service transmission.
  • the frequency band used by STA2 and STA3 to send LLR frames is randomly selected from 5 RUs.
  • STA2 selects frequency band 1 and STA3 selects frequency band 3.
  • the AP and STA in the same service set divide the available spectrum resources into N candidate frequency bands based on the number of associated STAs, where N is a positive integer greater than or equal to 1 and the value of N is greater than or equal to the number of STAs associated with the AP.
  • the first frequency band used by multiple different second communication devices to send low-latency service requests to the TXOP holder is the frequency band corresponding to the second communication device in multiple candidate frequency bands.
  • Figure 14 shows another possible preemptive transmission process when the holder of the TXOP is an AP.
  • the AP holding the TXOP is associated with three STAs, namely STA1, STA2 and STA3.
  • the AP and the STA negotiate in advance to use the three RUs of 106-tone outside the second frequency band as candidate frequency bands, and specify that the frequency band used by STA1 to send a low-latency service request frame is frequency band 1, the frequency band used by STA2 to send a low-latency service request frame is frequency band 2, and the frequency band used by STA3 to send a low-latency service request frame is frequency band 3.
  • STA1, STA2 and STA3 send low-latency service request frames in their respective corresponding frequency bands.
  • the AP sends an RTS frame to STA1 within the duration of the TXOP to request transmission.
  • the RTS frame carries information that informs the STA that the TXOP is allowed to be preempted.
  • STA1 After receiving the RTS for SIFS time, STA1 sends a CTS frame to the AP to allow the AP to transmit services to it. After receiving the CTS frame sent by STA1 for SIFS time, the AP sends non-LL data to STA1. The data is divided into packets, so STA1 does not need to send a BA frame to the AP for confirmation after receiving each data packet, but instead replies with a BA frame after multiple packets are sent. While the AP is sending non-LL data to STA1, STA3 hopes to preempt TXOP for low-latency service transmission. The AP receives a low-latency service request frame sent by STA3 in frequency band 3. Among them, the frequency band division method of the first frequency band can be divided according to RU division or in other ways, which is not limited in the embodiments of the present application.
  • the non-holder randomly selects the first frequency band from multiple candidate frequency bands to send a low-latency service request frame.
  • the needs of preemptive transmission and the effective use of spectrum resources can be met without knowing how many users participate in the preemption, thereby improving the utilization rate of frequency band resources; or, the non-holder uses the corresponding frequency band when sending a low-latency service request frame, so that the low-latency service request frames sent by different non-holders will not collide on the first frequency band, thereby increasing the probability of the low-latency service request frame sent by the non-holder being successfully received, which can avoid the failure of preemptive TXOP caused by collision between low-latency service request frames, thereby optimizing the mechanism of preemptive transmission.
  • the first preemption confirmation frame may be a CTS frame sent by the first communication device.
  • STA3 when the holder of TXOP is AP, STA3 sends a low-latency service request frame, and AP sends a PA frame/CTS frame to STA3 that initiates the preemption request, allowing STA3 to preempt the transmission.
  • AP replies with a BA frame for confirmation, and the preemption transmission ends.
  • AP continues to send non-low-latency services to STA1.
  • STA1 replies with a BA frame to AP until the AP's TXOP ends.
  • the AP negotiates with the STA about resources of a first frequency band and a second frequency band, wherein the second frequency band is used to send and/or receive BA frames.
  • the AP negotiates with the STA about the resources of the first frequency band (frequency band 1) and the resources of the second frequency band (BA frame band), and STA2 that initiates the preemption request sends an LLR frame in frequency band 1 outside the preset BA frame band used for sending and/or receiving BA frames.
  • STA1 the holder of the TXOP, receives the BA frame sent by the AP and receives the LLR frame sent by STA2 in the agreed candidate frequency band.
  • the solution provided by the embodiment of the present application is that the AP and the STA pre-negotiate the allocation result of the frequency band resources and use the frequency band according to the negotiation result. This can clarify the frequency band used by the second communication device to initiate preemption and the communication device to send and/or receive BA frames, thereby optimizing the mechanism of preempting transmission.
  • the resources of the second frequency band and the first frequency band are set to resources without overlapping parts, thereby increasing the possibility of successfully receiving the BA frame during the TXOP preemption process. This can improve the reliability of data transmission, thereby optimizing the preemption transmission mechanism.
  • the resources of the first frequency band may include the resources of the second frequency band.
  • the communication device receiving the non-low-latency service does not need to immediately reply with a BA frame, and the resources of the second frequency band and the first frequency band can be set to resources with overlapping parts.
  • the apparatus further includes an execution unit 1903, and the execution unit 1903 is configured to detect the signal strength of the second communication device.
  • the device 1800 of FIG. 18 or the device 1900 of FIG. 19 is embodied in the form of a functional unit.
  • the term "unit” herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (e.g., a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit, and/or other suitable components that support the described functions.
  • ASIC application specific integrated circuit
  • processor e.g., a shared processor, a dedicated processor, or a group processor, etc.
  • memory for executing one or more software or firmware programs, a merged logic circuit, and/or other suitable components that support the described functions.
  • the device 1800 or the device 1900 may be specifically the AP in the above-mentioned embodiment, and may be used to execute the various processes and/or steps corresponding to the AP in the above-mentioned method embodiment (such as the various processes/steps in the methods of the aforementioned FIG. 6, FIG. 7, and FIG. 9 to FIG. 15), or the device 1800 or the device 1900 may be specifically the STA in the above-mentioned embodiment, and may be used to execute the various processes and/or steps corresponding to the STA in the above-mentioned method embodiment (such as the various processes/steps in the methods of the aforementioned FIG. 6, FIG. 7, and FIG. 9 to FIG. 15). To avoid repetition, the description is not repeated here.
  • the apparatus 1800 or apparatus 1900 of each of the above-mentioned schemes has the function of implementing the corresponding steps executed by the AP in the above-mentioned method, or the apparatus 1800 or apparatus 1900 of each of the above-mentioned schemes has the function of implementing the corresponding steps executed by the STA in the above-mentioned method.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the sending unit, the receiving unit, and the detection unit can be replaced by a transceiver (for example, the sending unit can be replaced by a transmitter, and the receiving unit and the detection unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor, respectively performing the sending and receiving operations and related processing operations in each method embodiment.
  • a transceiver for example, the sending unit can be replaced by a transmitter, and the receiving unit and the detection unit can be replaced by a receiver
  • other units such as the processing unit
  • the above-mentioned sending unit, receiving unit, and detection unit can also be a transceiver circuit (for example, it can include a receiving circuit and a sending circuit), and the processing unit can be a processing circuit.
  • the device in Figures 18 and 19 can be the AP or STA in the aforementioned embodiments, or it can be a chip or a chip system, such as: a system on chip (system on chip, SoC).
  • the sending unit or the receiving unit, the detection unit can be an input and output circuit, a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip. This is not limited here.
  • FIG20 shows a schematic diagram of a possible communication device 2000 provided in an embodiment of the present application.
  • the device 2000 includes a processor 2100 and a transceiver 2200.
  • the processor 2100 and the transceiver 2200 communicate with each other through an internal connection path, and the processor 2100 is used to execute instructions to control the transceiver 2200 to send signals and/or receive signals.
  • the device 2000 may further include a memory 2300, and the memory 2300 communicates with the processor 2100 and the transceiver 2200 through an internal connection path.
  • the memory 2300 is used to store instructions, and the processor 2100 can execute the instructions stored in the memory 2300.
  • the device 2000 is used to implement the various processes and steps corresponding to the AP in the above method embodiment.
  • the device 2000 is used to implement the various processes and steps corresponding to the STA in the above method embodiment.
  • the device 2000 can be specifically the AP or STA in the above-mentioned embodiment, or it can be a chip or a chip system.
  • the transceiver 2200 can be the transceiver circuit of the chip, which is not limited here.
  • the device 2000 can be used to execute the various steps and/or processes corresponding to the transmitting end or the receiving end in the above-mentioned method embodiment.
  • the memory 2300 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A part of the memory may also include a non-volatile random access memory.
  • the memory may also store information about the device type.
  • each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the steps of the method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in a processor for execution.
  • the software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.
  • the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities.
  • each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software.
  • the above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • the processor in the embodiment of the present application can implement or execute the methods, steps and logic block diagrams disclosed in the embodiment of the present application.
  • the general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.
  • the steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined and performed.
  • the software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories.
  • the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory.
  • the volatile memory can be a random access memory (RAM), which is used as an external cache.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé et un appareil de transmission de données basés sur une transmission préemptive. Le procédé comprend les étapes suivantes : envoi d'une trame de demande à faible latence (LLR) à un premier dispositif de communication, la trame LLR étant utilisée pour demander la préemption d'une opportunité de transmission (TXOP) détenue par le premier dispositif de communication ; réception d'une première trame de confirmation de préemption, la première trame de confirmation de préemption étant utilisée pour indiquer le succès de la préemption ; et réalisation d'une transmission de données dans la TXOP. Selon le procédé et l'appareil fournis par la présente demande, un dispositif de communication censé préempter une TXOP initie une LLR auprès d'un dispositif de communication détenant la TXOP, et peut transmettre des données uniquement lorsqu'une confirmation de préemption est obtenue ; de cette manière, d'une part, la transmission de données d'un détenteur de TXOP peut être garantie, ce qui permet d'éviter une contention de canal fréquente dans une certaine période de temps, et d'autre part, un non-détenteur de TXOP peut participer à la préemption au moyen d'une trame LLR, élargissant la plage d'application de transmission préemptive, optimisant le mécanisme de transmission préemptive.
PCT/CN2024/140614 2024-01-08 2024-12-19 Procédé et appareil de transmission de données basés sur une transmission préemptive Pending WO2025148646A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202410029552.9A CN120282303A (zh) 2024-01-08 2024-01-08 一种基于抢占传输的数据传输的方法及装置
CN202410029552.9 2024-01-08

Publications (1)

Publication Number Publication Date
WO2025148646A1 true WO2025148646A1 (fr) 2025-07-17

Family

ID=96235326

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/140614 Pending WO2025148646A1 (fr) 2024-01-08 2024-12-19 Procédé et appareil de transmission de données basés sur une transmission préemptive

Country Status (2)

Country Link
CN (1) CN120282303A (fr)
WO (1) WO2025148646A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115103454A (zh) * 2022-06-23 2022-09-23 重庆邮电大学 一种面向6TiSCH网络的突发性紧急数据流时隙抢占方法
US20230208774A1 (en) * 2023-01-04 2023-06-29 Intel Corporation Preemption for low latency application
CN116803184A (zh) * 2021-09-15 2023-09-22 索尼集团公司 正在进行的低优先级ppdu的抢占/中断
CN117336876A (zh) * 2023-10-10 2024-01-02 上海云攀半导体有限公司 低延迟业务传输方法及系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116803184A (zh) * 2021-09-15 2023-09-22 索尼集团公司 正在进行的低优先级ppdu的抢占/中断
CN115103454A (zh) * 2022-06-23 2022-09-23 重庆邮电大学 一种面向6TiSCH网络的突发性紧急数据流时隙抢占方法
US20230208774A1 (en) * 2023-01-04 2023-06-29 Intel Corporation Preemption for low latency application
CN117336876A (zh) * 2023-10-10 2024-01-02 上海云攀半导体有限公司 低延迟业务传输方法及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
INTEL CORPORATION: "Indication of preemption of DL transmissions", 3GPP DRAFT; R1-1707414 INTEL - URLLC_EMBB_MUX_DL, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Hangzhou; 20170515 - 20170519, 14 May 2017 (2017-05-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051272623 *

Also Published As

Publication number Publication date
CN120282303A (zh) 2025-07-08

Similar Documents

Publication Publication Date Title
US11838957B2 (en) NSTR MLD channel access with shared TXOP
US8787328B2 (en) Method and apparatus for reserving data channel in a wireless access system
JP7648740B2 (ja) チャネルアクセス方法および通信装置
WO2022143176A1 (fr) Procédé, appareil et système de transmission de service
WO2015021772A1 (fr) Procédé, appareil et système pour un accès à un canal
CN102625367B (zh) 多跳Ad Hoc网络中时隙优化的多信道多址接入控制方法
WO2015137662A1 (fr) Procédé et dispositif de transmission de données dans un système de lan sans fil acceptant un canal orienté en liaison descendante
WO2015081718A1 (fr) Procédé et appareil de traitement de communications pour réseau sans fil
CN104219017B (zh) 一种物理层数据包传输方法以及接入节点
US10306602B2 (en) Data transmission method and apparatus
CN118019153A (zh) 多链路信道存取方法
US20250220731A1 (en) Data Transmission Method and Apparatus
WO2025066855A1 (fr) Procédé et appareil d'accès à un canal
WO2025148646A1 (fr) Procédé et appareil de transmission de données basés sur une transmission préemptive
WO2022200912A1 (fr) Accès à un canal de mld nstr avec txop partagée
CN115643609A (zh) 调度方法、装置及系统
US20240188135A1 (en) Channel backoff in a wireless network
US20250344241A1 (en) Prioritized channel access for low latency wireless traffic
WO2025236251A1 (fr) Procédé de communication sans fil, dispositif et support de stockage
WO2024169950A1 (fr) Procédé de communication et appareil de communication
WO2025148658A1 (fr) Procédé et appareil de communication basés sur un accès à un canal de bande de fréquences aléatoire
WO2024188111A1 (fr) Procédé de communication et appareil de communication
WO2024230367A1 (fr) Procédé de communication et produit associé
CN117769047A (zh) 数据传输方法、装置、设备及存储介质

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24916693

Country of ref document: EP

Kind code of ref document: A1