WO2018068716A1 - 传输唤醒帧的方法和设备 - Google Patents

传输唤醒帧的方法和设备 Download PDF

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Publication number
WO2018068716A1
WO2018068716A1 PCT/CN2017/105647 CN2017105647W WO2018068716A1 WO 2018068716 A1 WO2018068716 A1 WO 2018068716A1 CN 2017105647 W CN2017105647 W CN 2017105647W WO 2018068716 A1 WO2018068716 A1 WO 2018068716A1
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WIPO (PCT)
Prior art keywords
frame
wake
time
parameter set
edca parameter
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PCT/CN2017/105647
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English (en)
French (fr)
Inventor
郭宇宸
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华为技术有限公司
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Publication of WO2018068716A1 publication Critical patent/WO2018068716A1/zh
Priority to US16/382,154 priority Critical patent/US10917848B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications and, more particularly, to a method and apparatus for transmitting wake-up frames.
  • the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard organization plans to add a new Low Power (LP) Wake-up Receiver (WUR) to the receiving device.
  • LP Low Power
  • WUR Wake-up Receiver
  • the transmitting device first sends a wakeup packet to the WUR.
  • the WUR correctly receives the WUP sent to itself and sends a wakeup signal to the primary transceiver module to wake up the receiving device.
  • the main transceiver module so that the transmitting device can communicate with the main transceiver module of the receiving device, and the WUR goes to sleep.
  • a method for sending a wake-up frame to a WUR of a receiving end device is not provided. Therefore, a method for transmitting a wake-up frame is required, and the quality of service (QoS) performance of the wake-up frame can be guaranteed.
  • QoS quality of service
  • the embodiments of the present application provide a method and a device for transmitting a wake-up frame, which can improve QoS performance of a wake-up frame.
  • a method of transmitting a wake-up frame includes: determining, by a first device, an enhanced distributed channel access EDCA parameter set of a wake-up frame, the wake-up frame is configured to wake up one or more second devices to receive a data frame; and the first device determines an EDCA parameter according to the wake-up frame And determining, by the first device, whether the channel resource is in an idle state; the first device sends the wake-up frame to the second device when the channel resource is in an idle state.
  • Determining, by the first device, an EDCA parameter set of the wake-up frame, the wake-up frame is configured to wake up one or more second devices to receive the data frame, determine, according to the EDCA parameter set of the wake-up frame, whether the channel resource is in an idle state, and the channel resource is idle.
  • the state sends a wake-up frame to the second device, so that the first device can perform channel resource contention according to the EDCA parameter set corresponding to the wake-up frame, so that the high-priority wake-up frame can obtain high-priority service, thereby improving the QoS of the wake-up frame. performance.
  • the method when the wake-up frame is used to wake up a second device to receive the first data frame sent by the first device, the method further includes: determining, by the first device, a channel of the first data frame The access level, the channel access level of the first data frame corresponds to the first EDCA parameter set; wherein the determining, by the first device, the EDCA parameter set of the wake-up frame includes: determining, by the first device, the first EDCA parameter set as the The EDCA parameter set of the wake-up frame.
  • the EDCA parameter set corresponding to the data frame is used as the EDCA parameter set of the wake-up frame, so that the wake-up frame corresponding to the high-priority data frame can also obtain the high-priority service.
  • the awake frame is used to wake up each of the plurality of second devices to receive data corresponding to each of the plurality of data frames sent by the first device.
  • the method further includes: determining, by the first device, a first channel access level in a channel access level of the multiple data frames, where the first channel access level corresponds to a second EDCA parameter set, the first channel The access level is the highest channel access level of the channel access levels of the multiple data frames; wherein the determining, by the first device, the EDCA parameter set of the wake-up frame includes: determining, by the first device, the second EDCA parameter set as The EDCA parameter set of the wake-up frame.
  • channel contention may be performed according to a higher priority EDCA parameter set.
  • the determining, by the first device, the EDCA parameter set of the wake-up frame includes: determining, by the first device, an EDCA parameter set corresponding to a highest channel access level of the system as an EDCA parameter set of the wake-up frame.
  • the first device can use the EDCA parameter set corresponding to the highest channel access level in the system as the EDCA parameter set of the wake-up frame, so that each wake-up frame can obtain a high-priority channel contention service.
  • the EDCA parameter set of the wake-up frame includes a contention window duration and a frame interval duration
  • the first device determines, according to the EDCA parameter set of the wake-up frame, whether the channel resource is in an idle state, including: A device determines a backoff duration according to the duration of the contention window. The first device determines whether the channel resource is in an idle state according to the frame interval duration and the backoff duration.
  • the media state is determined by the physical carrier sensing and the virtual carrier sensing function, and the channel resource is idle during the contention window duration and the frame interval duration, and the channel resource is determined to be in an idle state, thereby ensuring transmission to the second device.
  • the QoS performance of the wake-up frame is determined by the physical carrier sensing and the virtual carrier sensing function, and the channel resource is idle during the contention window duration and the frame interval duration, and the channel resource is determined to be in an idle state, thereby ensuring transmission to the second device.
  • the EDCA parameter set of the wake-up frame includes a frame interval duration, where determining, by the first device, whether the channel resource is in an idle state according to the EDCA parameter set of the wake-up frame includes: the first device according to the The frame interval duration determines whether the channel resource is in an idle state.
  • the channel resource When the first device determines that the channel resource is idle within the frame interval duration, the channel resource may be considered to be in an idle state, and the first device may immediately send the wake-up frame to the second device, that is, the wake-up frame obtains a high-priority channel contention service.
  • the present application provides a method for transmitting a wake-up frame, the method includes: the first device sending, to the at least one second device, indication information, where the indication information indicates a first time that the first device sends the wake-up frame; The first device transmits the wake-up frame at the first time.
  • the first device sends the indication information for indicating the first time that the first device sends the wake-up frame to the second device, and sends the wake-up frame to the second device at the first time, so that the first device passes the advance Notifying the second device of the time of sending the wake-up frame, so that the second device can accurately receive the wake-up frame according to the first time, thereby improving the QoS performance of the wake-up frame.
  • the indication information includes time information and frame type information, where the time information indicates the first time, the frame type information indicates that the frame type sent by the first device at the first time is the wake-up frame. .
  • the first device sends indication information to the at least one second device, where the indication information includes time information and frame type information.
  • the time information that is, the first device prepares to transmit the data frame at the time indicated by the time information
  • the frame type information is used to indicate the frame type of the data frame transmitted by the first device at the time indicated by the time information. That is, the time information and frame class Type information has a corresponding relationship.
  • the sending, by the first device, the indication information to the at least one second device includes: sending, by the first device, target wake-up time TWT information to the at least one second device, where the TWT information carries the indication information .
  • the sending, by the first device, the indication information to the at least one second device may be carried by the TWT information, so that the first device does not need to specifically send the indication information, which saves power consumption of the first device.
  • the frame type information includes at least one bit, and the value of the at least one bit is used to indicate whether the frame type sent by the first device at the first time is the wake-up frame.
  • the first device may multiplex the reserved value of the TWT identifier in the TWT information, and the second device determines, according to the reserved value of the TWT identifier, whether the frame type sent by the first device at the time indicated by the time information is a wake-up frame, that is, the first The second device determines whether the first time indicated by the indication information is used by the first device to send the wake-up frame. If the first time is used by the first device to send the wake-up frame, the second device determines, according to the first time, the second time that the wake-up frame is received, so that the first device does not need to configure a dedicated resource for the frame type information, thereby reducing Indicates the resource usage of the information.
  • the time information includes a time period length and a start time.
  • the first device may determine a start time, a time length, and the like of sending the wake-up frame, and send the same to the second device, indicating the first time by the start time and the time length.
  • the time information includes a time period, a time period length, and a start time.
  • the sending, by the first device, the wake-up frame may be a periodic transmission, and sending the time period to the second device by using the time information.
  • the present application provides a method for transmitting a wake-up frame, the method further includes: receiving, by the second device, indication information sent by the first device, where the indication information indicates a first time that the first device sends the wake-up frame; The second device determines, according to the first time, a second time of receiving the wake-up frame; and the second device receives the wake-up frame at the second time.
  • the second device receives the indication information that is sent by the first device to indicate that the first device sends the wake-up frame, and the second device determines, according to the indication information, the second time that the wake-up frame is received, where the second device receives the second time.
  • the wake-up frame sent by the first device at the first time so that the first device can notify the second device to send the wake-up frame in advance, so that the second device can accurately receive the wake-up frame according to the second time determined by the first time, thereby Improve the QoS performance of the wake-up frame.
  • the indication information includes time information and frame type information, where the time information indicates the first time, the frame type information indicates that the frame type sent by the first device at the first time is the wake-up frame. .
  • the second device receives the indication information sent by the first device, where the indication information includes time information and frame type information.
  • the time information that is, the first device prepares to transmit the data frame at the time indicated by the time information
  • the frame type information is used to indicate the frame type of the data frame transmitted by the first device at the time indicated by the time information. That is to say, the time information and the frame type information have a corresponding relationship.
  • the receiving, by the second device, the indication information sent by the first device includes: receiving, by the second device, the target wake-up time TWT information sent by the first device, where the TWT information carries the indication information.
  • the second device receives the first device sending indication information that can be carried by the TWT information, so that the first device does not need to specifically send the indication information, which saves power consumption of the first device.
  • the frame type information includes at least one bit
  • the value of the at least one bit is used to indicate whether the frame type sent by the first device at the first time is the wake-up frame, and the second Equipment according to the first Before the second time of receiving the wake-up frame
  • the method further includes: determining, by the second device, the time that the first device sends the wake-up frame according to the value of the at least one bit.
  • the first device may multiplex the reserved value of the TWT identifier in the TWT information, and the second device determines, according to the reserved value of the TWT identifier, whether the frame type sent by the first device at the time indicated by the time information is a wake-up frame, that is, the first The second device determines whether the first time indicated by the indication information is used by the first device to send the wake-up frame. If the first time is used by the first device to send the wake-up frame, the second device determines, according to the first time, the second time that the wake-up frame is received, so that the first device does not need to configure a dedicated resource for the frame type information, thereby reducing Indicates the resource usage of the information.
  • the time information includes a time period length and a start time.
  • the first device may determine a start time, a time length, and the like of sending the wake-up frame, and send the same to the second device, indicating the first time by the start time and the time length.
  • the time information includes a time period, a time period length, and a start time.
  • the sending, by the first device, the wake-up frame may be a periodic transmission, and sending the time period to the second device by using the time information.
  • the present application provides a first device, the first device comprising means for performing the method of the first aspect or any possible implementation of the first aspect.
  • the present application provides a first device, the first device comprising means for performing the method of the second aspect or any possible implementation of the second aspect.
  • the present application provides a second device comprising means for performing the method of any of the third or third aspects of the possible implementation.
  • the application provides a system for transmitting a wake-up frame, the system comprising:
  • the present application provides a system for transmitting a wake-up frame, the system comprising:
  • the present application provides a first device, including: a processor, a memory, and a communication interface.
  • the processor is coupled to the memory and communication interface.
  • the memory is for storing instructions for the processor to execute, and the communication interface is for communicating with other network elements under the control of the processor.
  • the processor executes the instructions stored by the memory, the execution causes the processor to perform the method of the first aspect or any of the possible implementations of the first aspect.
  • the application provides a first device, including: a processor, a memory, and a communication interface.
  • the processor is coupled to the memory and communication interface.
  • the memory is for storing instructions for the processor to execute, and the communication interface is for communicating with other network elements under the control of the processor.
  • the processor executes the instructions stored by the memory, the execution causes the processor to perform the method of any of the possible implementations of the second aspect or the second aspect.
  • the application provides a second device, including: a processor, a memory, and a communication interface.
  • the processor is coupled to the memory and communication interface.
  • the memory is for storing instructions for the processor to execute, and the communication interface is for communicating with other network elements under the control of the processor.
  • the processor executes the instructions stored by the memory, the execution causes the processor to perform the method of any of the possible implementations of the third aspect or the third aspect.
  • a computer storage medium storing program code for indicating that the transmission of the first aspect or the first aspect of the first aspect is performed The instruction of the method of the frame.
  • a computer storage medium wherein the computer storage medium stores program code,
  • the program code is for indicating an instruction to perform the method of transmitting a wake-up frame in any of the possible implementations of the second aspect or the second aspect above.
  • a computer storage medium storing program code for indicating that the transmission wakeup is performed in any of the possible implementation manners of the second aspect or the second aspect The instruction of the method of the frame.
  • the first device determines an EDCA parameter set of the wake-up frame, where the wake-up frame is used to wake up one or more second devices to receive the data frame, and determine, according to the EDCA parameter set of the wake-up frame, whether the channel resource is in an idle state, and Sending a wake-up frame to the second device when the channel resource is in an idle state, so that the first device can perform channel resource contention according to the EDCA parameter set corresponding to the wake-up frame, so that the high-priority wake-up frame can obtain high-priority service, thereby improving The QoS performance of the wake-up frame.
  • FIG. 1 is a schematic diagram of a prior art method of transmitting a wake-up frame
  • FIG. 2 is a schematic diagram of an application scenario of an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a frame of a wake-up frame according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a method for transmitting a wake-up frame in the prior art
  • FIG. 5 is a schematic diagram of a method for transmitting a wake-up frame in the prior art
  • FIG. 6 is a schematic diagram of a method for transmitting a wake-up frame in the prior art
  • FIG. 7 is an interaction flowchart of a method for transmitting a wake-up frame according to an embodiment of the present application.
  • FIG. 8 is an interaction flowchart of a method for transmitting a wake-up frame according to still another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of TWT information according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of TWT information according to another embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a first device of an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of a first device of another embodiment of the present application.
  • FIG. 14 is a schematic block diagram of a second device of an embodiment of the present application.
  • 15 is a schematic block diagram of a system for transmitting a wake-up frame according to an embodiment of the present application.
  • 16 is a schematic block diagram of a system for transmitting a wake-up frame according to another embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a first device according to an embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of a first device according to another embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a second device according to another embodiment of the present application.
  • the embodiment of the present application can be applied to a Wireless Local Area Network (WLAN).
  • WLAN Wireless Local Area Network
  • IEEE Institute of Electrical and Electronics Engineers 802.11 series.
  • the WLAN may include a plurality of Basic Service Sets (BSSs), and the network nodes in the BSS are stations (Stations, STAs) and access points (APs).
  • BSS Basic Service Sets
  • AP access points
  • Each BSS may contain one AP and multiple STAs associated with the AP.
  • the sender device is described as an AP, but is not limited thereto.
  • APs are also called wireless access points or hotspots.
  • the AP is an access point for mobile users to enter the wired network. It is mainly deployed in the home, inside the building, and inside the campus. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also be deployed outdoors.
  • An AP is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect the wireless network clients together and then connect the wireless network to the Ethernet.
  • the AP may be a terminal device or a network device with a Wireless Fidelity (WiFi) chip.
  • WiFi Wireless Fidelity
  • the AP may be a device supporting the 802.11ax system. Further, the AP may be a device supporting multiple WLAN technologies such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a or subsequent versions.
  • the receiving end device in the embodiment of the present application is described by taking the STA as an example, but is not limited thereto.
  • the STA may be a wireless communication chip, a wireless sensor, or a wireless communication terminal.
  • mobile phone supporting WiFi communication function tablet computer supporting WiFi communication function, set-top box supporting WiFi communication function, smart TV supporting WiFi communication function, smart wearable device supporting WiFi communication function, and vehicle communication supporting WiFi communication function Devices and computers that support WiFi communication.
  • the site can support the 802.11ax system. Further optionally, the site supports multiple WLAN formats such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a or subsequent versions.
  • the IEEE 802.11 protocol proposes to optimize the device sleep strategy, that is, the sleep mechanism is introduced so that the STA can enter deep sleep when there is no data transmission and reception, so as to reduce the energy consumption of the continuous monitoring channel.
  • the AP cannot communicate with the STA, and only after the STA wakes up can the transmission be between the two, which may cause a certain delay.
  • the STA In order to avoid the high latency caused by the dormancy mechanism, the STA usually wakes up from time to time to check whether there is data to be sent or received. However, this reduces the sleep efficiency of the STA. For example, from time to time, there is no data to be sent and received. Sleeping all the time will consume more energy.
  • the IEEE 802.11 working group uses low-power wake-up receiver (LP-WUR, Low Power Wake Up Receiver) as the core technology to reduce the power consumption of WiFi, that is, to reduce the energy waste caused by no signal monitoring of the device, in addition to processing the optimized sleep strategy.
  • LP-WUR Low-power wake-up receiver
  • the receiving end device for example, STA
  • LP-WUR also referred to as "WUR” for short
  • the traditional 802.11 transceiver ie, the main transceiver module, the WiFi main transceiver module.
  • the low power WUR wakes up and works if other devices (eg, the AP in Figure 1) need to communicate with the device with the WUR and the primary transceiver module (eg, the STA in Figure 2)
  • the AP first sends a WUR Up Wrapper (WUP) to the WUR.
  • WUP WUR Up Wrapper
  • the WUR correctly receives the WUP sent to itself and then performs the wake-up STA's main transceiver module, and then goes to sleep itself.
  • the AP performs the wake-up master transceiver module. Communication.
  • the main transceiver module communicates with the AP, it will go to sleep.
  • the WUR wakes up and starts to listen to whether there is a WUP sent to itself to wake up the main transceiver module.
  • WUR In order to achieve low power consumption, WUR requires low complexity in its circuit construction and frame structure design (such as WUP).
  • the WUR circuit structure can contain only the energy detection and RF sections and is not used to demodulate complex modulation schemes.
  • the WUP can adopt a binary amplitude-keying (OOK) modulation method with a low transmission rate.
  • OOK binary amplitude-keying
  • FIG. 3 a possible WUP frame structure, the traditional 802.11 pilot in FIG. 3 can be understood by other surrounding 802.11 devices, and is used to protect the subsequent part from waking up by traditional 802.11 devices, where the traditional 802.11 pilot is used. It may include a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), and a Legacy Signal Field (L-SIG).
  • L-STF Legacy Short Training Field
  • L-LTF Legacy Long Training Field
  • L-SIG Legacy Signal Field
  • the payload part of the WUP is followed by OOK modulation, which can only be understood by WUR.
  • the payload portion may include a Wake-Up Preamble, a Media Access Control Header (MAC Header), a frame body, and a Frame Check Sequence (FCS).
  • the wake-up preamble is used to identify the WUP signal; the MAC Header is equivalent to the WUR identifier (Identity, ID) for distinguishing different WURs; the frame carrier can be used to carry some other information; and the frame check sequence is used to ensure the received data and The data sent is consistent.
  • the WUR ID can be a complete network identifier of the WUR, or a short network identifier, or other information that can distinguish between different WURs. After receiving a WUP, a WUR needs to view the WUR ID. Only when the WUR ID matches its own ID can the main transceiver module be woken up.
  • the AP can also send a group wake-up frame to wake up a group of STAs.
  • a group wake-up frame needs to carry multiple WUR WUR IDs (or WUR group IDs) to facilitate multiple WURs to wake up at the same time.
  • the AP can send a wake-up beacon (WB) to wake up a group of STAs and also carry some basic information, so that the WUR can be used for information update after receiving.
  • WB wake-up beacon
  • Carrier Sense Multiple with collision avoidance is used in 802.11.
  • CSMA/CA Access with Collision Avoidance
  • DCF Distributed Coordination Function
  • the wireless medium is first subjected to a fixed duration of listening to perform a Clear Channel Access (CCA). If the media status is idle, the STA thinks it can own the media and start a frame exchange. If the media state is busy, the STA waits for the media to become idle, delays the fixed duration, and further waits for a random backoff (BO) period. If the media remains idle during the fixed duration delay and the backoff period, the STA considers it can own the media and begin a frame exchange.
  • CCA Clear Channel Access
  • BO random backoff
  • CSMA/CA Carrier Sensing
  • the DCF simultaneously determines the media status through physical carrier sensing and virtual carrier sensing.
  • the physical carrier sensing function is located in the physical layer (PHY), which determines whether the media is busy by Energy Detection (ED) and Preamble Detection (PD) with frame length delay.
  • Virtual carrier sensing is located in the MAC, which uses predetermined information carried in the duration field of the MAC frame header, which declares exclusive access to the media.
  • the virtual carrier sensing function is called Network Allocation Vector (NAV). Only when the physical carrier sensing and carrier sensing mechanisms consider the channel to be idle, the channel is considered to be idle, otherwise the channel is considered busy.
  • the basic access method is shown in Figure 4, where DCF inter-frame space (DIFS), point coordination function inter-frame space (PIFS), and short interframe space (short) Inter-frame space (SIFS) is a different fixed duration for different types of frames.
  • DIFS DCF inter-frame space
  • PIFS point
  • the fallback mechanism under DCF between multiple STAs is shown in Figure 5.
  • the random backoff time that the STA needs to roll back is the value of a random backoff multiplied by the time of each time slot.
  • the value of the random backoff is from A randomly selected window [0, CW] randomly has a plurality of values in the Contention Window (CW).
  • CWmin Contention Window
  • the minimum value is CWmin, and each time a conflict is sent.
  • the CW increases successively until the maximum value of CW, that is, CWmax.
  • the CW is reset to CWmin.
  • the number of levels of each window is reduced by one, and is roughly twice that of the previous level (may be called "window double"), as shown in Figure 6.
  • EDCA Enhanced distributed channel access
  • AC includes AC_BK, AC_BE, AC_VI, AC_VO and Legacy.
  • the EDCA parameter set includes CWmin, CWmax, any inter-frame space (AIFS), and a transmission opportunity limit (TXOP limit).
  • TXOP limit indicates that if the channel resource is idle, if multiple transmissions are needed. Frame, then the total length of the occupied channel cannot exceed the TXOP limit value.
  • the EDCA parameters of different ACs are shown in Table 1.
  • AC CWmin CWmax AIFSN TXOP limit AC_BK 31 1023 7 0
  • AIFS replaces DIFS in DCF, that is, when the channel returns to idle, STA must wait for AIFS to retreat. process.
  • the initial value of its backoff counter should be randomly generated from [0, 31].
  • the embodiment of the present application provides a method for transmitting a wake-up frame, which can guarantee the Quality of Service (QoS) performance of the wake-up frame.
  • QoS Quality of Service
  • FIG. 7 shows a schematic flow chart of a method of transmitting a wake-up frame according to an embodiment of the present application.
  • the first device determines an EDCA parameter set of the wake-up frame, where the wake-up frame is used to wake up one or more second devices to receive the data frame.
  • the first device may preset a mapping relationship between different wake-up frames and an EDCA parameter set, or the first device determines a mapping relationship between different wake-up frames and an EDCA parameter set according to certain parameters corresponding to the wake-up frame.
  • the first device can determine an EDCA parameter set corresponding to each wake-up frame according to the mapping relationship.
  • the wake-up frame can be used to wake up a second device to receive data frames, and can also be used to wake up multiple second devices to receive data frames.
  • the data frames sent by the first device to the multiple second devices may be the same or different, which is not limited in this application.
  • the first device includes a main transceiver module
  • the second device includes a main transceiver module and a WUR module, or the first device may further include a WUR module.
  • the first device is a device that transmits a wake-up frame
  • the second device is a device that receives a wake-up frame.
  • the primary transceiver module of the second device is in a sleep state before waking up, until the WUR module of the second device receives the wake-up frame, and wakes up the primary transceiver module of the second device, and the first device can perform the same with the primary transceiver module of the second device. Communication.
  • the first device may be an AP (such as a router), the second device may be an STA (such as a mobile phone); or the first device may be a STA (such as a mobile phone), and the second device may be a wearable device, such as a wristband.
  • the first device and the second device may also be other devices having the corresponding functions described above, but the application is not limited thereto.
  • two devices may have WUR transceiving capabilities at the same time, and the roles of the two devices depend on the current communication scenario.
  • mobile phones and wristbands both of which may have WUR transceiving capabilities, and have power-saving requirements, so they can run in WUR mode at the same time, but need to inform the other party's own wake-up window.
  • the wake-up packet is sent to the wristband in the wake-up window of the wristband.
  • the mobile phone is the first device
  • the wristband is the second device; when the wristband has data to When the mobile phone sends, the wake-up packet is sent to the mobile phone in the wake-up window of the mobile phone.
  • the wristband is the first device, and the mobile phone is the second device.
  • the method further includes: determining, by the first device, a channel access level of the first data frame, The channel access level of the first data frame corresponds to the first EDCA parameter set; wherein the determining, by the first device, the EDCA parameter set of the wake-up frame comprises: determining, by the first device, the first EDCA parameter set as the EDCA of the wake-up frame Parameter set.
  • the wake-up frame is a wake-up frame for a second device (which may be referred to as an Individually Addressed Wakeup Packet (IWP))
  • the wake-up frame is used to wake up the second device to receive the data frame ( Expressed as the first data frame).
  • the first device Determining, by the first device, a channel access level of the first data frame, where the EDCA parameter set corresponding to the channel access level of the first data frame is represented as a first EDCA parameter set (as shown in Table 1), and the first device
  • An EDCA parameter set is used as the EDCA parameter set for the wake-up frame.
  • the awake frame is used to wake up each of the plurality of second devices to receive, in the plurality of data frames sent by the first device, corresponding to each of the second devices.
  • the method further includes: determining, by the first device, a first channel access level in a channel access level of the multiple data frames, where the first channel access level corresponds to a second EDCA parameter set, the first The channel access level is the highest channel access level of the channel access levels of the plurality of data frames; wherein the determining, by the first device, the EDCA parameter set of the wake-up frame includes: determining, by the first device, the second EDCA parameter set The EDCA parameter set for this wake-up frame.
  • the wake-up frame is a wake-up frame (which may be referred to as “WB”) for multiple second devices
  • the WB is used to wake up multiple second devices to receive multiple data frames sent by the first device.
  • the first device may determine a highest channel access level (represented as a first channel access level) of the channel access levels of the plurality of data frames, and the EDCA parameter set corresponding to the highest channel access level (represented as The second EDCA parameter set).
  • the first device can determine the second EDCA parameter set as the EDCA parameter set of the wake-up frame. That is to say, for a wake-up frame capable of waking up a plurality of second devices, channel contention can be performed according to a higher priority EDCA parameter set.
  • the first device will AC_VI (ie, the three channel access levels)
  • the corresponding parameter set in the highest channel access level) is determined as the EDCA parameter set of the WB.
  • the determining, by the first device, the EDCA parameter set of the wake-up frame includes: determining, by the first device, the EDCA parameter set corresponding to the highest channel access level of the system as the EDCA parameter set of the wake-up frame.
  • the first device may also determine an EDCA parameter set corresponding to any access level as an EDCA parameter set of the wake-up frame.
  • the first device may use the highest channel access level in the system or the EDCA parameter set corresponding to any access level as a wake-up frame.
  • the EDCA parameter set enables each wake-up frame to receive a high priority channel contention service, or other suitable channel service.
  • the first device may directly determine the parameter set corresponding to AC_VO (ie, the highest channel access level in the system) as the EDCA parameter set of the WB.
  • the first device may also specifically configure an EDCA parameter set for the wake-up frame, that is, the wake-up frames corresponding to different second devices respectively have corresponding EDCA parameter sets, which is not limited in this application.
  • the first device determines, according to the EDCA parameter set of the wake-up frame, whether the channel resource is in an idle state.
  • the first device determines whether the channel resource is idle according to the EDCA parameter set of the wake-up frame, and may also be referred to as the first device to perform backoff according to each parameter in the EDCA parameter set of the wake-up frame (as shown in FIG. 5 and FIG. 6), and the successful recovery is successful competition. To the channel.
  • the EDCA parameter set of the wake-up frame includes a contention window duration and a frame interval duration, where the determining, by the first device, whether the channel resource is in an idle state according to the EDCA parameter set of the wake-up frame includes: the first device is in the When the content of the contention window and the time of the frame interval are idle, it is determined that the channel resource is in an idle state.
  • the EDCA parameter set of the wake-up frame includes a contention window duration and a frame interval duration.
  • the contention window duration includes a competition window duration minimum value and a contention window duration maximum value.
  • the specific implementation process may be as shown in FIG. 5, and the random backoff time that the STA needs to roll back is a random backoff value multiplied by the time of each time slot.
  • the value of the random backoff is randomly selected from a uniformly distributed window [0, CW].
  • the minimum value is CWmin, and each time a collision occurs, retransmission is required, and the CW is successively increased until the maximum value of CW is reached, that is, CWmax.
  • the CW is reset to CWmin.
  • the interval between frames can be DIFS, PIFS, SIFS, or AIFS.
  • the first device determines that the channel is idle after the frame interval duration, and determines the backoff duration according to the target contention window duration.
  • the first device may determine the target contention window duration as the backoff duration, and start counting down by the backoff timer. If the channel is busy, the backoff timer needs to be suspended (ie, the timer is stopped) until the timer ends. If the channel resource is still idle, it is determined that the channel resource is in an idle state, otherwise the channel resource is considered to be in a busy state.
  • the EDCA parameter set of the wake-up frame includes a frame interval duration
  • the determining, by the first device, whether the channel resource is idle according to the EDCA parameter set of the wake-up frame includes: the first device according to the frame Whether the channel resource is in an idle state within the interval duration, and determining whether the channel resource is in an idle state.
  • the first device may determine, according to the frame interval duration included in the EDCA parameter set of the wake-up frame, whether the channel resource is idle, that is, the first device determines that the channel resource is idle after determining that the channel resource is idle within the frame interval duration, and further A device can immediately send a wake-up frame to the second device.
  • inter-frame interval may be any one of DIFS, PIFS, SIFS, or AIFS, which is not limited in this application.
  • the first device sends the wake-up frame to the second device when the channel resource is in an idle state.
  • the second device After receiving the wake-up frame by the WUR module, the second device sends a wake-up signal to the main transceiver module, so that the main transceiver module is in an awake state, so that the data frame sent by the first device can be received.
  • the first device determines an EDCA parameter set of the wake-up frame, where the wake-up frame is used to wake up one or more second devices to receive a data frame, and determine according to the EDCA parameter set of the wake-up frame. Whether the channel resource is in an idle state, and sends a wake-up frame to the second device when the channel resource is in an idle state, so that the first device can perform channel resource contention according to the EDCA parameter set corresponding to the wake-up frame, so that the wake-up frame with high priority can be obtained.
  • High-priority services that improve the QoS performance of wake-up frames.
  • FIG. 8 shows a schematic flowchart of a method of transmitting a wake-up frame according to another embodiment of the present application.
  • the first device sends, to the at least one second device, indication information, where the indication information is used to indicate a first time that the first device sends the wake-up frame.
  • the first time may be a specific one or more time points, or may be one or more time periods, which is not limited in this application.
  • the indication information includes time information and frame type information, where the time information indicates the first time, the frame type information indicating that the frame type sent by the first device at the first time is the wake-up frame.
  • the first device sends indication information to the at least one second device, where the indication information includes time information and frame type information.
  • the time information that is, the first device prepares to transmit the data frame at the time indicated by the time information
  • the frame type information is used to indicate the frame type of the data frame transmitted by the first device at the time indicated by the time information. That is to say, the time information and the frame type information have a corresponding relationship.
  • the sending, by the first device, the indication information to the at least one second device includes: sending, by the first device, target wake-up time TWT information to the at least one second device, where the TWT information carries the indication information.
  • the sending, by the first device, the indication information to the at least one second device may be carried by the TWT information.
  • the structure of the TWT information in the 802.ax system is as shown in FIG. 10 and FIG. 11, wherein the position of the time information in the TWT information is the wake-up time in FIG. 10, and the position of the frame type information in the TWT information is as shown in FIG. The type of request in .
  • the second device may also carry the indication information by using a broadcast frame or a beacon frame, etc., which is not limited in this application.
  • the indication information may include a period length and a start time.
  • the first device may determine a start time, a time length, and the like of sending the wake-up frame, and send the same to the second device, indicating the first time by the start time and the time length.
  • the indication information may include a time period, a period length, and a start time.
  • the sending, by the first device, the wake-up frame may be a periodic transmission, and sending the time period to the second device by using the indication information.
  • the time period, the period length and the start time of the first time for instructing the first device to send the wake-up frame may be indicated by the same indication information, or may be indicated by the indication information respectively.
  • the structure of the broadcast frame is as shown in FIG. 9. I1 in the broadcast frame is used to indicate the period in which the time period appears, I2 is used to indicate the length of each time period, and I3 is used to indicate the start time of the time period.
  • the second device determines, according to the first time, a second time of receiving the wake-up frame.
  • the second device may wake up according to the indication information at the start time of sending the wake-up frame by the first device, or wake up to prepare to receive the wake-up frame in advance, to ensure the accuracy of the wake-up frame reception; or accurately calculate the first device and the first After the delay between the two devices, delay the delay and wake up again to save power consumption of the second device.
  • the second time may be a specific one or more time points, or may be one or more time periods, and the second time may also be the same as the first time, which is not limited in this application.
  • the frame type information includes at least one bit, where the value of the at least one bit is used to indicate whether the frame type sent by the first device at the first time is the wake-up frame, and the second device is configured according to the Before the second time of receiving the wake-up frame, the method further includes: determining, by the second device, the time that the first device sends the wake-up frame according to the value of the at least one bit.
  • the frame type information may be represented by at least one bit.
  • the second device may multiplex the reserved value of the TWT identifier in the TWT information.
  • the second device determines whether the first time indicated by the indication information is used by the first device to send wake-up Framed. If the first time is used by the first device to send the wake-up frame, the second device determines, according to the first time, the second time of receiving the wake-up frame.
  • the structure of the TWT information in the 802.ax system is as shown in FIG. 10 .
  • the specific request type structure is as shown in FIG. 11 , and at least one bit corresponds to the TWT identifier, and 3 bits correspond to the TWT identifier as an example.
  • the value of the identifier can be as shown in Table 2 below.
  • the value of the TWT identifier is from 3 to 7 as a reserved field.
  • the reserved field can be multiplexed, and the mapping relationship between the reserved field and the wake-up frame is configured.
  • the value of the TWT identifier is 3, indicating that the frame type sent by the first device at the first time is a wake-up frame (as shown in Table 3), so that the second device can determine the first time to receive the wake-up frame according to the first time. Two times, so that the second device can accurately receive the wake-up frame.
  • the transmitted frame type is a wake-up frame.
  • the first device sends the wake-up frame at the first time.
  • the first device transmits the wake-up frame according to the time indicated to the second device (represented as the first time).
  • the first device may further send a channel reservation frame to the second device to reserve a channel, and ensure that the wake-up frame can be sent out.
  • the channel reserved frame may be a clear to send (CTS) frame, and the channel reserved frame may also carry NAV information.
  • the second device receives the wake-up frame at the second time.
  • the second device wakes up to receive the wake-up frame in the second time, that is, the first device can negotiate the time of sending the wake-up frame with the second device in advance, so that the second device wakes up to receive the wake-up frame within the negotiated time, thereby avoiding
  • the WUR module of the second device is always in the listening state, thereby further saving the power consumption of the second device.
  • a method of transmitting a wake-up frame according to an embodiment of the present application is described in detail above, and an apparatus for transmitting a wake-up frame according to an embodiment of the present application will be described below.
  • FIG. 12 shows a schematic block diagram of a first device 1100 in accordance with an embodiment of the present application. As shown in FIG. 12, the first device 1100 includes:
  • the processing module 1110 is configured to determine an enhanced distributed channel access EDCA parameter set of the wake-up frame, where the wake-up frame is used to wake up one or more second devices to receive the data frame;
  • the processing module 1110 is further configured to determine, according to the EDCA parameter set of the wake-up frame, whether the channel resource is in an idle state;
  • the sending module 1120 is configured to send the wake-up frame to the second device when the channel resource is in an idle state.
  • the first device in the embodiment of the present application determines the EDCA parameter set of the wake-up frame, the wake-up frame is used to wake up one or more second devices to receive the data frame, and determine whether the channel resource is in the EDCA parameter set according to the wake-up frame.
  • An idle state and sending a wake-up frame to the second device when the channel resource is in an idle state, so that the first device can perform channel resource contention according to the EDCA parameter set corresponding to the wake-up frame, so that the high-priority wake-up frame can obtain high priority.
  • Service which improves the QoS performance of the wake-up frame.
  • the processing module is further configured to determine a channel access level of the first data frame, where the The channel access level of a data frame corresponds to the first EDCA parameter set; the processing module is specifically configured to: determine the first EDCA parameter set as the EDCA parameter set of the wake-up frame.
  • the processing module is further configured to determine a first channel access level in a channel access level of the multiple data frames, where the first channel access level corresponds to a second EDCA parameter set, where the first channel access level is The highest channel access level of the channel access levels of the data frames; the processing module is specifically configured to: determine the second EDCA parameter set as the EDCA parameter set of the wake-up frame.
  • the processing module is specifically configured to: determine an EDCA parameter set corresponding to a highest channel access level of the system as an EDCA parameter set of the wake-up frame.
  • the EDCA parameter set of the wake-up frame includes a contention duration and a frame interval duration; the processing module is specifically configured to: determine a backoff duration according to the contention duration of the contention window; determine the channel resource according to the backoff duration and the frame interval duration Is in an idle state.
  • the EDCA parameter set of the wake-up frame includes a frame interval duration; the processing module is specifically configured to: determine that the channel resource is in an idle state according to the frame interval duration.
  • a first device may correspond to a first device of a method of transmitting a wake-up frame according to an embodiment of the present application, and the above-described and other operations and/or functions of respective modules in the first device respectively implement the foregoing The corresponding process of the method is not repeated here for the sake of brevity.
  • the first device in the embodiment of the present application determines the EDCA parameter set of the wake-up frame, the wake-up frame is used to wake up one or more second devices to receive the data frame, and determine whether the channel resource is in the EDCA parameter set according to the wake-up frame.
  • An idle state and sending a wake-up frame to the second device when the channel resource is in an idle state, so that the first device can perform channel resource contention according to the EDCA parameter set corresponding to the wake-up frame, so that the high-priority wake-up frame can obtain high priority.
  • Service which improves the QoS performance of the wake-up frame.
  • FIG. 13 shows a schematic block diagram of a first device 1200 in accordance with an embodiment of the present application. As shown in FIG. 13, the first device 1200 includes:
  • the sending module 1210 is configured to send, to the at least one second device, indication information, where the indication information indicates a first time that the first device sends the wake-up frame;
  • the sending module 1210 is further configured to send the wake-up frame at the first time.
  • the first device in the embodiment of the present application sends the indication information indicating the first time that the first device sends the wake-up frame to the second device to the second device, and sends the wake-up to the second device at the first time.
  • the frame such that the first device can notify the second device to send the wake-up frame in advance, so that the second device can accurately receive the wake-up frame according to the first time, thereby improving the QoS performance of the wake-up frame.
  • the indication information includes time information and frame type information, where the time information indicates the first time, the frame type information indicating that the frame type sent by the first device at the first time is the wake-up frame.
  • the sending module 1210 is specifically configured to: send, by the first device, the target wake-up time TWT information to the at least one second device, where the TWT information carries the indication information.
  • the frame type information includes at least one bit, where the value of the at least one bit is used to indicate whether the frame type sent by the first device at the first time is the wake-up frame.
  • the time information includes a time period length and a start time.
  • the time information includes a time period, a period length, and a start time.
  • the first device in the embodiment of the present application sends the indication information indicating the first time that the first device sends the wake-up frame to the second device to the second device, and sends the wake-up to the second device at the first time.
  • the frame such that the first device can notify the second device to send the wake-up frame in advance, so that the second device can accurately receive the wake-up frame according to the first time, thereby improving the QoS performance of the wake-up frame.
  • a first device may correspond to a first device of a method of transmitting a wake-up frame according to an embodiment of the present application, and the above-described and other operations and/or functions of respective modules in the first device respectively implement the foregoing The corresponding process of the method is not repeated here for the sake of brevity.
  • FIG. 14 shows a schematic block diagram of a second device 1300 in accordance with an embodiment of the present application. As shown in FIG. 14, the second device 1300 includes:
  • the receiving module 1310 is configured to receive indication information that is sent by the first device, where the indication information indicates a first time that the first device sends the wake-up frame.
  • the processing module 1320 is configured to determine, according to the first time, a second time for receiving the wake-up frame
  • the receiving module 1310 is further configured to receive the wake-up frame at the second time.
  • the second device of the embodiment of the present application by receiving the first device, sends indication information for instructing the first device to send the wake-up frame, and determining, according to the indication information, the second time for receiving the wake-up frame, the second device Receiving, at a second time, a wake-up frame sent by the first device at the first time, so that the second device informs in advance by receiving the first device.
  • the time of sending the wake-up frame is such that the second device can accurately receive the wake-up frame according to the second time determined by the first time, thereby improving the QoS performance of the wake-up frame.
  • the indication information includes time information and frame type information, where the time information indicates the first time, the frame type information indicating that the frame type sent by the first device at the first time is the wake-up frame.
  • the receiving module 1310 is specifically configured to: receive the target wake-up time TWT information sent by the first device, where the TWT information carries the indication information.
  • the frame type information includes at least one bit, where the value of the at least one bit is used to indicate whether the frame type sent by the first device at the first time is the wake-up frame, and the processing module is further configured to: The value of the at least one bit determines that the first time is the time for the first device to send the wake-up frame.
  • the time information includes a time period length and a start time.
  • the time information includes a time period, a period length, and a start time.
  • a second device may correspond to a second device of a method of transmitting a wake-up frame according to an embodiment of the present application, and the above and other operations and/or functions of respective modules in the second device are respectively implemented to implement the foregoing The corresponding process of the method is not repeated here for the sake of brevity.
  • the second device of the embodiment of the present application by receiving the first device, sends indication information for instructing the first device to send the wake-up frame, and determining, according to the indication information, the second time for receiving the wake-up frame, the second device Receiving, at a second time, the wake-up frame sent by the first device at the first time, so that the second device can receive the time of sending the wake-up frame notified by the first device in advance, so that the second device can be accurate according to the second time determined by the first time.
  • the wake-up frame is received, thereby improving the QoS performance of the wake-up frame.
  • FIG. 15 shows a system 1400 for transmitting a wake-up frame in an embodiment of the present application, the system 1400 comprising:
  • the first device 1100 and the second device 1410 in the embodiment shown in FIG. 1 are identical to the first device 1100 and the second device 1410 in the embodiment shown in FIG.
  • FIG. 16 shows a system 1500 for transmitting a wake-up frame in an embodiment of the present application, the system 1500 comprising:
  • FIG. 17 is a schematic structural diagram of a first device provided by an embodiment of the present application.
  • the first device includes at least one processor 1602 (eg, a general purpose processor CPU with computation and processing capabilities, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array ( The FPGA 1602 is used to manage and schedule the modules and devices in the first device.
  • the processing module 1110 in the embodiment shown in FIG. 12 can be implemented by the processor 1602.
  • the first device also includes at least one transceiver 1605 (receiver/transmitter 1605), a memory 1606, and at least one bus system 1603.
  • the transmitting module 1120 in the embodiment shown in FIG. 12 can be implemented by the transceiver 1605.
  • the various components of the first device are coupled together by a bus system 1603, which may include a data bus, a power bus, a control bus, a status signal bus, etc., but for clarity of description, various buses are labeled as Bus
  • the method disclosed in the above embodiments of the present application may be applied to the processor 1602, or used to execute an executable module, such as a computer program, stored in the memory 1606.
  • the memory 1606 may include a high speed random access memory (RAM), and may also include a non-volatile memory.
  • the memory may include a read only memory and a random access memory, and provides the processor with Required signaling or data, programs, etc.
  • a portion of the memory may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • a communication connection with at least one other network element is achieved by at least one transceiver 1605 (which may be wired or wireless).
  • the memory 1606 stores a program 16061
  • the processor 1602 executes the program 16061, Used to do the following:
  • the wake-up frame is used to wake up one or more second devices to receive the data frame;
  • the wake-up frame is transmitted to the second device by the transceiver 1605 when the channel resource is in an idle state.
  • the first device may be specifically the first device in the embodiment shown in FIG. 7 , and may be used to perform various steps corresponding to the first device in the method embodiment shown in FIG. 7 and/or Process.
  • the wake-up frame is used to wake up one or more second devices to receive a data frame, and determine a channel according to the EDCA parameter set of the wake-up frame. Whether the resource is in an idle state, and sends a wake-up frame to the second device when the channel resource is in an idle state, so that the first device can perform channel resource contention according to the EDCA parameter set corresponding to the wake-up frame, so that the high-priority wake-up frame can be obtained high.
  • Priority service which improves the QoS performance of the wake-up frame.
  • FIG. 18 is a schematic structural diagram of a first device provided by an embodiment of the present application.
  • the first device includes at least one transceiver 1705 (receiver/transmitter 1705).
  • the transmitting module 1210 in the embodiment shown in FIG. 13 can be implemented by the transceiver 1705.
  • the first device also includes at least one processor 1702 (eg, a general purpose processor CPU with computing and processing capabilities, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), etc.)
  • a memory 1706 and at least one bus system 1703, the processor 1702 is configured to manage and schedule modules and devices within the first device.
  • the various components of the first device are coupled together by a bus system 1703, which may include a data bus, a power bus, a control bus, a status signal bus, etc., but for clarity of description, various buses are labeled as Bus system 1703.
  • the method disclosed in the above embodiments of the present application may be applied to the processor 1702, or used to execute an executable module, such as a computer program, stored in the memory 1706.
  • the memory 1706 may include a high speed random access memory (RAM), and may also include a non-volatile memory.
  • the memory may include a read only memory and a random access memory, and provides the processor with Required signaling or data, programs, etc.
  • a portion of the memory may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • a communication connection with at least one other network element is achieved by at least one transceiver 1705 (which may be wired or wireless).
  • memory 1706 stores program 17061, and processor 1702 executes program 17061 for performing the following operations:
  • the wake-up frame is transmitted by the transceiver 1705 at the first time.
  • the first device may be specifically the first device in the embodiment shown in FIG. 8 , and may be used to perform various steps corresponding to the first device in the method embodiment shown in FIG. 8 and/or Process.
  • the indication information indicating the first time that the first device sends the wake-up frame to the second device, and then sending the second information to the second time.
  • the device sends the wake-up frame, so that the first device can notify the second device to send the wake-up frame in advance, so that the second device can accurately receive the wake-up frame according to the first time, thereby improving the QoS performance of the wake-up frame.
  • FIG. 19 is a schematic structural diagram of a second device provided by an embodiment of the present application.
  • the second device includes at least one processor 1802 (eg, a general purpose processor CPU with computation and processing capabilities, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array ( FPGA), etc.), processor 1802 Used to manage and schedule each module and device in the second device.
  • the processing module 1320 in the embodiment shown in FIG. 14 can be implemented by the processor 1802.
  • the first device also includes at least one transceiver 1805 (receiver/transmitter 1805), a memory 1806, and at least one bus system 1803.
  • the receiving module 1310 in the embodiment shown in FIG.
  • bus system 1803 which may include a data bus, a power bus, a control bus, a status signal bus, etc., but for clarity of description, various buses are labeled as Bus system 1803.
  • the method disclosed in the above embodiments of the present application may be applied to the processor 1802 or used to execute an executable module, such as a computer program, stored in the memory 1806.
  • the memory 1806 may include a high speed random access memory (RAM), and may also include a non-volatile memory.
  • the memory may include a read only memory and a random access memory, and provide the processor with Required signaling or data, programs, etc.
  • a portion of the memory may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • a communication connection with at least one other network element is achieved by at least one transceiver 1805 (which may be wired or wireless).
  • the memory 1806 stores a program 18061, and the processor 1802 executes the program 18061 for performing the following operations:
  • the wake-up frame is received by the transceiver 1805 at the second time.
  • the first device may be specifically the second device in the embodiment shown in FIG. 8 , and may be used to perform various steps corresponding to the second device in the method embodiment shown in FIG. 8 and/or Process.
  • the second time for receiving the wake-up frame is determined according to the indication information, Receiving, by the second device, the wake-up frame sent by the first device at the first time, the second device, by receiving the time of sending the wake-up frame notified by the first device in advance, so that the second device can determine the first time according to the first time
  • the wake-up frame is received accurately at the second time, thereby improving the QoS performance of the wake-up frame.
  • the embodiment of the present application further provides a computer storage medium, which can store program instructions for indicating any of the above methods.
  • the storage medium may be specifically 1606, 1706 or 1806.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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Abstract

本申请实施例提供了一种传输唤醒帧的方法和设备，该方法包括：第一设备确定唤醒帧的增强型分布式信道接入EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧；该第一设备根据该唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态；该第一设备在该信道资源处于空闲状态时，向该第二设备发送该唤醒帧。本申请实施例中第一设备能够根据唤醒帧对应的EDCA参数集进行信道资源竞争，使得传输优先级高的唤醒帧能够得到高优先级的服务，从而提高了唤醒帧的QoS性能。

Description

传输唤醒帧的方法和设备
本申请要求于2016年10月14日提交中国专利局、申请号为201610896172.0、申请名称为“传输唤醒帧的方法和设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及传输唤醒帧的方法和设备。
背景技术
电气和电子工程师协会(Institute of Electrical and Electronics Engineers，IEEE)802.11标准组织计划制定在接收端设备新增低功耗(Lower Power，LP)唤醒接收机(Wake-up Receiver，WUR)。接收端设备的主收发模块进入休眠后，低功耗的WUR苏醒开始工作。如果发送端设备需要与上述接收端设备进行通信，发送端设备首先向WUR发送唤醒帧(Wake up Packet)，WUR正确收到发给自己的WUP后向主收发模块发送唤醒信号以唤醒接收端设备的主收发模块，这样发送端设备能够与接收端设备的主收发模块进行通信，而WUR转入休眠。
现有技术中，并没有给出发送端设备向接收端设备的WUR发送唤醒帧的方法，因此亟待一种传输唤醒帧的方法，能够保证唤醒帧的服务质量(Quality Of Service，QoS)性能。
发明内容
本申请实施例提供一种传输唤醒帧的方法和设备，能够提高唤醒帧的QoS性能。
第一方面，提供了一种传输唤醒帧的方法。该方法包括：第一设备确定唤醒帧的增强型分布式信道接入EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧；该第一设备根据该唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态；该第一设备在该信道资源处于空闲状态时，向该第二设备发送该唤醒帧。
第一设备确定唤醒帧的EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧，根据该唤醒帧的EDCA参数集确定信道资源是否处于空闲状态，并在信道资源处于空闲状态时向第二设备发送唤醒帧，这样第一设备能够根据唤醒帧对应的EDCA参数集进行信道资源竞争，使得优先级高的唤醒帧能够得到高优先级的服务，从而提高了唤醒帧的QoS性能。
在一些可能的实现方式中，在该唤醒帧用于唤醒一个该第二设备接收该第一设备发送的第一数据帧时，该方法还包括：该第一设备确定该第一数据帧的信道接入等级，该第一数据帧的信道接入等级对应第一EDCA参数集；其中，该第一设备确定唤醒帧的EDCA参数集包括：该第一设备将该第一EDCA参数集确定为该唤醒帧的EDCA参数集。
本申请实施例，将数据帧对应的EDCA参数集作为唤醒帧的EDCA参数集，使得高优先级的数据帧对应的唤醒帧也能够得到高优先级的服务。
在一些可能的实现方式中，在该唤醒帧用于唤醒多个该第二设备中的每个第二设备接收该第一设备发送的多个数据帧中与该每个第二设备对应的数据帧时，该方法还包括：该第一设备确定该多个数据帧的信道接入等级中的第一信道接入等级，该第一信道接入等级对应第二EDCA参数集，该第一信道接入等级为该多个数据帧的信道接入等级中的最高信道接入等级；其中，该第一设备确定唤醒帧的EDCA参数集包括：该第一设备将该第二EDCA参数集确定为该唤醒帧的EDCA参数集。
本申请实施例中，对于能够唤醒多个第二设备的唤醒帧，可以根据更高的优先级的EDCA参数集进行信道竞争。
在一些可能的实现方式中，该第一设备确定唤醒帧的EDCA参数集包括：该第一设备将系统最高信道接入等级对应的EDCA参数集确定为该唤醒帧的EDCA参数集。
第一设备都可以将系统中的最高信道接入等级对应的EDCA参数集作为唤醒帧的EDCA参数集，使得每个唤醒帧都能够得到高优先级的信道竞争服务。
在一些可能的实现方式中，该唤醒帧的EDCA参数集包括竞争窗口时长和帧间隔时长；其中，该第一设备根据该唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态包括：该第一设备根据该竞争窗口时长，确定退避时长；该第一设备根据该帧间隔时长和该退避时长，确定该信道资源是否处于空闲状态。
本申请实施例通过物理载波侦听和虚拟载波侦听功能来判断媒体状态，在竞争窗口时长和帧间隔时长内信道资源是空闲，确定信道资源是处于空闲状态，从而能够保证传输到第二设备的唤醒帧的QoS性能。
在一些可能的实现方式中，该唤醒帧的EDCA参数集包括帧间隔时长；其中，该第一设备根据该唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态包括：该第一设备根据该帧间隔时长，确定该信道资源是否处于空闲状态。
第一设备在帧间隔时长内确定信道资源空闲就可以认为信道资源处于空闲状态，进而第一设备可以立即向第二设备发送唤醒帧，也就是说，唤醒帧得到高优先级的信道竞争服务。
第二方面，本申请提供了一种传输唤醒帧的方法，该方法包括：第一设备向至少一个第二设备发送指示信息，该指示信息指示该第一设备发送唤醒帧的第一时间；该第一设备在该第一时间，发送该唤醒帧。
第一设备通过向第二设备向第二设备发送用于指示第一设备发送唤醒帧的第一时间的指示信息，再在第一时间发送向第二设备发送唤醒帧，这样第一设备通过提前告知第二设备发送唤醒帧的时间，使得第二设备能够在根据第一时间准确的接收到唤醒帧，从而提高了唤醒帧的QoS性能。
在一些可能的实现方式中，该指示信息包括时间信息和帧类型信息，该时间信息指示该第一时间，该帧类型信息指示该第一设备在该第一时间发送的帧类型为该唤醒帧。
第一设备向至少一个第二设备发送指示信息，该指示信息包括时间信息和帧类型信息。时间信息即第一设备准备在该时间信息指示的时间发送数据帧，而帧类型信息用于指示第一设备在时间信息指示的时间发送的数据帧的帧类型。也就是说，该时间信息和帧类 型信息具有对应关系。
在一些可能的实现方式中，该第一设备向该至少一个第二设备发送该指示信息包括：该第一设备向该至少一个第二设备发送目标唤醒时间TWT信息，该TWT信息携带该指示信息。
第一设备向至少一个第二设备发送指示信息可以通过TWT信息携带，这样第一设备不需要专门发送指示信息，节省了第一设备的功耗。
在一些可能的实现方式中，该帧类型信息包括至少一个比特，该至少一个比特的取值用于指示该第一设备在该第一时间发送的帧类型是否为该唤醒帧。
第一设备可以复用TWT信息中TWT标识的预留值，第二设备根据TWT标识的预留值确定第一设备在时间信息指示的时间发送的帧类型是否是唤醒帧，也就是说，第二设备确定指示信息指示的第一时间是否是第一设备用来发送唤醒帧的。若该第一时间是第一设备用来发送唤醒帧的，则第二设备根据该第一时间确定接收唤醒帧的第二时间，这样第一设备不需要为帧类型信息配置专门的资源，降低指示信息的资源占用。
在一些可能的实现方式中，该时间信息包括时段长度和起始时刻。
在第一时间为时间段时，第一设备可以确定发送唤醒帧的起始时刻和时段长度等，并发送给第二设备，通过起始时刻和时段长度指示该第一时间。
在一些可能的实现方式中，该时间信息包括时间周期、时段长度和起始时刻。
第一设备发送该唤醒帧可以是周期性的发送，并将该时间周期通过时间信息发送给第二设备。
第三方面，本申请提供了一种传输唤醒帧的方法，该方法还包括：第二设备接收第一设备发送的指示信息，该指示信息指示该第一设备发送唤醒帧的第一时间；该第二设备根据该第一时间，确定接收该唤醒帧的第二时间；该第二设备在该第二时间，接收该唤醒帧。
第二设备接收第一设备发送的用于指示第一设备发送唤醒帧的第一时间的指示信息，第二设备根据该指示信息确定接收唤醒帧的第二时间，第二设备在第二时间接收第一设备在第一时间发送的唤醒帧，这样第一设备通过提前告知第二设备发送唤醒帧的时间，使得第二设备能够根据第一时间确定的第二时间准确的接收到唤醒帧，从而提高了唤醒帧的QoS性能。
在一些可能的实现方式中，该指示信息包括时间信息和帧类型信息，该时间信息指示该第一时间，该帧类型信息指示该第一设备在该第一时间发送的帧类型为该唤醒帧。
第二设备接收第一设备发送的指示信息，该指示信息包括时间信息和帧类型信息。时间信息即第一设备准备在该时间信息指示的时间发送数据帧，而帧类型信息用于指示第一设备在时间信息指示的时间发送的数据帧的帧类型。也就是说，该时间信息和帧类型信息具有对应关系。
在一些可能的实现方式中，该第二设备接收第一设备发送的指示信息包括：该第二设备接收该第一设备发送的目标唤醒时间TWT信息，该TWT信息携带该指示信息。
第二设备接收第一设备发送指示信息可以通过TWT信息携带的，这样第一设备不需要专门发送指示信息，节省了第一设备的功耗。
在一些可能的实现方式中，该帧类型信息包括至少一个比特，该至少一个比特的取值用于指示该第一设备在该第一时间发送的帧类型是否为该唤醒帧，在该第二设备根据该第 一时间确定接收该唤醒帧的第二时间之前，该方法还包括：该第二设备根据该至少一个比特的取值，确定该第一时间为该第一设备发送该唤醒帧的时间。
第一设备可以复用TWT信息中TWT标识的预留值，第二设备根据TWT标识的预留值确定第一设备在时间信息指示的时间发送的帧类型是否是唤醒帧，也就是说，第二设备确定指示信息指示的第一时间是否是第一设备用来发送唤醒帧的。若该第一时间是第一设备用来发送唤醒帧的，则第二设备根据该第一时间确定接收唤醒帧的第二时间，这样第一设备不需要为帧类型信息配置专门的资源，降低指示信息的资源占用。
在一些可能的实现方式中，该时间信息包括时段长度和起始时刻。
在第一时间为时间段时，第一设备可以确定发送唤醒帧的起始时刻和时段长度等，并发送给第二设备，通过起始时刻和时段长度指示该第一时间。
在一些可能的实现方式中，该时间信息包括时间周期、时段长度和起始时刻。
第一设备发送该唤醒帧可以是周期性的发送，并将该时间周期通过时间信息发送给第二设备。
第四方面，本申请提供了一种第一设备，该第一设备包括用于执行第一方面或第一方面的任意可能的实现方式中的方法的模块。
第五方面，本申请提供了一种第一设备，该第一设备包括用于执行第二方面或第二方面的任意可能的实现方式中的方法的模块。
第六方面，本申请提供了一种第二设备，该第二设备包括用于执行第三方面或第三方面的任意可能的实现方式中的方法的模块。
第七方面，本申请提供了一种传输唤醒帧的系统，该系统包括：
上述第一方面的第一设备和第二设备。
第八方面，本申请提供了一种传输唤醒帧的系统，该系统包括：
上述第二方面的第一设备和上述第三方面的第二设备。
第九方面，本申请提供了一种第一设备，包括：处理器、存储器和通信接口。处理器与存储器和通信接口连接。存储器用于存储指令，处理器用于执行该指令，通信接口用于在处理器的控制下与其他网元进行通信。该处理器执行该存储器存储的指令时，该执行使得该处理器执行第一方面或第一方面的任意可能的实现方式中的方法。
第十方面，本申请提供了一种第一设备，包括：处理器、存储器和通信接口。处理器与存储器和通信接口连接。存储器用于存储指令，处理器用于执行该指令，通信接口用于在处理器的控制下与其他网元进行通信。该处理器执行该存储器存储的指令时，该执行使得该处理器执行第二方面或第二方面的任意可能的实现方式中的方法。
第十一方面，本申请提供了一种第二设备，包括：处理器、存储器和通信接口。处理器与存储器和通信接口连接。存储器用于存储指令，处理器用于执行该指令，通信接口用于在处理器的控制下与其他网元进行通信。该处理器执行该存储器存储的指令时，该执行使得该处理器执行第三方面或第三方面的任意可能的实现方式中的方法。
第十二方面，提供了一种计算机存储介质，该计算机存储介质中存储有程序代码，该程序代码用于指示执行上述第一方面或第一方面的任一种可能的实现方式中的传输唤醒帧的方法的指令。
第十三方面，提供了一种计算机存储介质，该计算机存储介质中存储有程序代码，该 程序代码用于指示执行上述第二方面或第二方面的任一种可能的实现方式中的传输唤醒帧的方法的指令。
第十四方面，提供了一种计算机存储介质，该计算机存储介质中存储有程序代码，该程序代码用于指示执行上述第二方面或第二方面的任一种可能的实现方式中的传输唤醒帧的方法的指令。
基于上述技术方案，第一设备确定唤醒帧的EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧，根据该唤醒帧的EDCA参数集确定信道资源是否处于空闲状态，并在信道资源处于空闲状态时向第二设备发送唤醒帧，这样第一设备能够根据唤醒帧对应的EDCA参数集进行信道资源竞争，使得优先级高的唤醒帧能够得到高优先级的服务，从而提高了唤醒帧的QoS性能。
附图说明
图1是现有技术的传输唤醒帧的方法的示意图；
图2是本申请实施例的应用场景示意图；
图3是本申请一个实施例的唤醒帧的帧结构示意图；
图4是现有技术的传输唤醒帧的方法的示意图；
图5是现有技术的传输唤醒帧的方法的示意图；
图6是现有技术的传输唤醒帧的方法的示意图；
图7是本申请一个实施例的传输唤醒帧的方法的交互流程图；
图8是本申请又一个实施例的传输唤醒帧的方法的交互流程图；
图9是本申请实施例的时间信息的结构示意图；
图10是本申请一个实施例的TWT信息的结构示意图；
图11是本申请另一个实施例的TWT信息的结构示意图；
图12是本申请实施例的第一设备的示意性框图；
图13是本申请另一个实施例的第一设备的示意性框图；
图14是本申请实施例的第二设备的示意性框图；
图15是本申请实施例的传输唤醒帧的系统的示意性框图；
图16是本申请另一个实施例的传输唤醒帧的系统的示意性框图；
图17是本申请实施例的第一设备的结构示意图；
图18是本申请另一个实施例的第一设备的结构示意图；
图19是本申请另一个实施例的第二设备的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例可以应用于无线局域网(Wireless Local Area Network，WLAN)，目前WLAN采用的标准为电气和电子工程师协会(Institute of Electrical and Electronics Engineers，IEEE)802.11系列。WLAN可以包括多个基本服务集(Basic Service Set，BSS)，BSS中的网络节点为站点(Station，STA)和接入点(Access Point，AP)。每个BSS可以包含一个AP和多个关联于该AP的STA。
本申请实施例中以发送端设备为AP进行说明，但并不限于此。AP也称之为无线访问接入点或热点等。AP是移动用户进入有线网络的接入点，主要部署于家庭、大楼内部以及园区内部，典型覆盖半径为几十米至上百米，当然，也可以部署于户外。AP相当于一个连接有线网和无线网的桥梁，其主要作用是将各个无线网络客户端连接到一起，然后将无线网络接入以太网。具体地，AP可以是带有无线保真(Wireless Fidelity，WiFi)芯片的终端设备或者网络设备。可选地，AP可以为支持802.11ax制式的设备，进一步可选地，该AP可以为支持802.11ac、802.11n、802.11g、802.11b及802.11a或后续版本等多种WLAN制式的设备。
本申请实施例中的接收端设备以STA为例进行说明，但并不限于此。STA可以是无线通讯芯片、无线传感器或无线通信终端。例如：支持WiFi通讯功能的移动电话、支持WiFi通讯功能的平板电脑、支持WiFi通讯功能的机顶盒、支持WiFi通讯功能的智能电视、支持WiFi通讯功能的智能可穿戴设备、支持WiFi通讯功能的车载通信设备和支持WiFi通讯功能的计算机。可选地，站点可以支持802.11ax制式，进一步可选地，该站点支持802.11ac、802.11n、802.11g、802.11b及802.11a或后续版本等多种WLAN制式。
如图1所示，在无线保真(Wireless Fidelity，WiFi)网络中当设备(例如，工作站(Station，STA))没有消息收发时，若持续监听信道将会消耗可观的能量。因此IEEE802.11协议中提出了优化设备休眠策略，即引入了休眠机制使得STA在无数据收发时可以进入深度休眠，以减少持续监听信道的能耗。但是，当STA处于深度休眠时AP无法与STA通信，只有等到STA苏醒后两者之间才能进行传输，这可能会导致一定的时延。为了避免休眠机制导致的高时延，STA通常会遵循一定的休眠策略不时醒来检查有无数据需要收发，然而这又降低了STA的休眠效率，例如，不时苏醒却没有数据需要收发，相比一直休眠会消耗更多能量。
IEEE802.11工作组以低功耗唤醒接收机(LP-WUR，Low Power Wake Up Receiver)为核心技术降低WiFi的功耗，即除处理优化休眠策略外，减少设备无信号的监听造成的能量浪费的另一个条技术途径是使用LP-WUR。如图2所示，接收端设备(例如，STA)除包含传统802.11的收发端(即主收发模块，WiFi主收发模块)，新增了LP-WUR(，也可以简称为“WUR”)。当主收发模块进入深度休眠后，低功耗的WUR苏醒开始工作，如果其他设备(例如，图1中的AP)需要与带有WUR和主收发模块的设备(例如，图2中的STA)通信，AP首先给WUR发送WUR唤醒帧(Wake Up Packet，WUP)，WUR正确收到发给自己的WUP后执行唤醒STA的主收发模块，然后自己转入休眠，AP则与苏醒的主收发模块进行通信。当主收发模块与AP通信完成后会进入休眠，同时WUR苏醒又开始侦听是否有发送给自己的WUP，以便唤醒主收发模块。
WUR为了实现低功耗，其电路构造、帧结构设计(如WUP)等需要具有低复杂度。WUR电路结构可以仅仅包含能量检测和射频部分，不用于解调复杂的调制方式。WUP可以采用传输速率较低的二进制振幅键控(On-Off Keying，OOK)调制方式。例如，如图3所示为一种可能的WUP帧结构，图3中的传统802.11先导可以被周围其他802.11设备听懂，用来保护唤醒后续部分不会被传统802.11设备干扰,其中传统802.11先导可以包括传统短训练字段(Legacy Short Training Field，L-STF)、传统长训练字段(Legacy Long Training Field，L-LTF)和信令字段(Legacy Signal Field，L-SIG)。需要说明的是，听到先导的 周边802.11设备在一段时间内不会抢占信道。后面为WUP的有效载荷(payload)部分，采用OOK调制，只有WUR才能听懂。该有效载荷部分可以包括唤醒先导(Wake-Up Preamble)、媒体访问控制头(Media Access Control Header，MAC Header)、帧载体(frame body)和帧校验序列(Frame Check Sequence，FCS)。其中，唤醒先导用于识别WUP信号；MAC Header相当于WUR标识(Identity，ID)用于区分不同的WUR；帧载体可以用于承载一些其他信息；而帧校验序列用于确保接收的数据与发送的数据一致。WUR ID可以是WUR完整的网络标识、或简短的网络标识，或其他可以区分不同WUR的信息。一个WUR在收到WUP之后，需要查看其中的WUR ID，只有当其中的WUR ID与自身的ID匹配时，才能够唤醒主收发模块。
此外，AP也可以发送组唤醒帧来唤醒一组STA。组唤醒帧需要携带多个WUR的WUR ID(或者WUR组ID)便于多个WUR同时醒来。例如，AP可以发送唤醒信标帧(wakeup Beacon，WB)，唤醒一组STA的同时还可以携带一些基本信息，便于WUR接收后用于信息更新。
为了保证AP和STA能够接入无线媒体(wireless medium)(即网络资源)，而又不相互之间发生冲突碰撞，802.11中使用了带有碰撞避免的载波侦听多址接入(Carrier Sense Multiple Access with Collision Avoidance，CSMA/CA)机制，该机制被称为分布式协调功能(Distributed Coordination Function，DCF)。当一个STA准备发送数据时，首先对无线媒体进行一个固定时长的侦听来进行一个空闲信道评估(Clear Channel Access，CCA)。如果媒体状态为空闲，则STA认为其可以拥有媒体并且开始一个帧交换。如果媒体状态繁忙，则STA等待媒体变为空闲状态，后延固定时长，并进一步等待一个随机的回退(backoff，BO)时段。如果媒体在固定时长后延以及回退时段期间保持空闲状态，则STA认为其可以拥有媒体并且开始一个帧交换。
CSMA/CA的基础在于载波侦听(Carrier Sensing，CS)，DCF同时通过物理载波侦听和虚拟载波侦听功能来判断媒体状态。物理载波侦听功能位于物理层(Physical layer，PHY)中，其通过能量检测(Energy Detection，ED)与带帧长后延的前导检测(Preamble Detection，PD)来判断媒体是否繁忙。虚拟载波侦听位于MAC中，其使用在MAC帧头的时长字段中所承载的预定信息，该信息声明了对媒体的独占接入。虚拟载波侦听功能被称作网络分配向量(Network Allocation Vector，NAV)。只有物理载波侦听和载波侦听机制都认为信道为空闲，才认为信道是空闲，否则认为信道是繁忙的。基本的接入方法图4所示，其中，DCF帧间间隔(DCF inter-frame space，DIFS)、点协调功能帧间间隔(Point coordination function inter-frame space，PIFS)和短帧间间隔(short inter-frame space，SIFS)为针对不同类型的帧的不同的固定时长。
多个STA之间DCF下的回退机制如图5所示，STA需要回退的随机回退时间为一个随机回退的值乘以每个时隙的时间，其中随机回退的值是从一个均匀分布的窗口[0，CW]当中随机选择的，竞争窗口(Contention Window，CW)存在多个值，初始化进行首次尝试(Initial Attempt)的时候为最小值，即CWmin，而每一次发送冲突时需要进行重传(Retransmission)，CW就逐次增大，直到CW的最大值，即CWmax。而当成功发送数据时，CW被重置(reset)为CWmin。每一个窗口的大小为2的级数减1，且大致为上一级的2倍(可以称为“窗口加倍”)，如图6所示。
增强型分布式信道接入(enhanced distributed channel access，EDCA)是DCF机制的增强，它允许不同接入等级(access category，AC)的业务具有不同的EDCA参数集，例如，AC包括AC_BK、AC_BE、AC_VI、AC_VO和传统(Legacy)。EDCA参数集包括CWmin，CWmax，任意帧间间隔(arbitrary inter-frame space，AIFS)、传输机会限制(transmit opportunity limit，TXOP limit)等，其中，TXOP limit表示信道资源空闲后，如果需要发送多个帧，那么总共占用的信道的时间长度不能超过该TXOP limit值。不同AC的EDCA参数如表1所示。
表1
AC CWmin CWmax AIFSN TXOP limit
AC_BK 31 1023 7 0
AC_BE 31 1023 3 0
AC_VI 15 31 2 3.008ms
AC_VO 7 15 2 1.504ms
Legacy 15 1023 2 0
对于某种特定AC(即已知等级)的业务，其退避的过程与DCF基本相同，区别在于AIFS取代了DCF中的DIFS，即当信道重新回到空闲时，STA必须等待AIFS才能进行退避的过程。AIFS的计算方法为AIFS[AC]＝aSIFSTime+AIFSN[AC]*aSlotTime。
例如，对于接入等级为AC_BE的业务，其EDCA参数集为{CWmin＝31，CWmax＝1023，AIFSN＝3}，因此在EDCA退避过程中，AIFS为aSIFSTime+3*aSlotTime，即即当信道重新回到空闲时，STA必须等待aSIFSTime+3*aSlotTime才能进行退避的过程。另外，其退避计数器的初始值应从[0，31]之间随机产生。
本申请实施例提出了一种传输唤醒帧的方法，能够保证唤醒帧的服务质量(Quality Of Service，QoS)性能。
图7示出了根据本申请一个实施例的传输唤醒帧的方法的示意性流程图。
701、第一设备确定唤醒帧的EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧。
第一设备可以预先设定不同唤醒帧与EDCA参数集的映射关系，或者第一设备根据唤醒帧对应的某些参数确定不同唤醒帧与EDCA参数集的映射关系。第一设备根据该映射关系能够确定每个唤醒帧对应的EDCA参数集。该唤醒帧可以用于唤醒一个第二设备能够接收数据帧，也可以用于唤醒多个第二设备能够接收数据帧。第一设备向多个第二设备发送的数据帧可以相同，也可以不同，本申请对此不进行限定。
第一设备包括主收发模块，第二设备包括主收发模块和WUR模块，或者第一设备也可以还包括WUR模块。第一设备是发送唤醒帧的设备，第二设备是接收唤醒帧的设备。第二设备的主收发模块在唤醒之前处于休眠状态，直到第二设备的WUR模块接收到唤醒帧后，唤醒第二设备的主收发模块，进而第一设备能够与第二设备的主收发模块进行通信。
应理解，第一设备可以是AP(如路由器)，第二设备可以是STA(如手机)；或者第一设备可以是STA(如手机)，第二设备可以是可穿戴设备，如手环。第一设备和第二设备还可以是具有上述对应功能的其他设备等，但本申请并不限于此。
或者，在某些场景中，两个设备可能同时具有WUR收发能力，则两设备的角色取决于当前的通信场景。例如，手机和手环，两者可能皆具备WUR收发能力，并且都有省电需求，因此可同时运行于WUR工作模式，但需告知对方自己的唤醒窗口规律。具体的，当手机有数据向手环发送时，则在手环的唤醒窗口中向手环发送唤醒包，此时，手机是第一设备，手环是第二设备；当手环有数据向手机发送时，则在手机的唤醒窗口中向手机发送唤醒包，此时，手环是第一设备，手机是第二设备。
可选地，在该唤醒帧用于唤醒一个该第二设备接收该第一设备发送的第一数据帧时，该方法还包括：该第一设备确定该第一数据帧的信道接入等级，该第一数据帧的信道接入等级对应第一EDCA参数集；其中，该第一设备确定唤醒帧的EDCA参数集包括：该第一设备将该第一EDCA参数集确定为该唤醒帧的EDCA参数集。
具体而言，若唤醒帧为针对一个第二设备的唤醒帧(可以称为单地址唤醒帧(Individually addressed Wakeup Packet，IWP))，则该唤醒帧用于唤醒这一个第二设备接收数据帧(表示为第一数据帧)。第一设备确定第一数据帧的信道接入等级，该第一数据帧的信道接入等级对应的EDCA参数集表示为第一EDCA参数集(如表1所示)，第一设备将该第一EDCA参数集作为该唤醒帧的EDCA参数集。
可选地，作为一个实施例，在该唤醒帧用于唤醒多个该第二设备中的每个第二设备接收该第一设备发送的多个数据帧中与该每个第二设备对应的数据帧时，该方法还包括：该第一设备确定该多个数据帧的信道接入等级中的第一信道接入等级，该第一信道接入等级对应第二EDCA参数集，该第一信道接入等级为该多个数据帧的信道接入等级中的最高信道接入等级；其中，该第一设备确定唤醒帧的EDCA参数集包括：该第一设备将该第二EDCA参数集确定为该唤醒帧的EDCA参数集。
具体而言，若该唤醒帧为针对多个第二设备的唤醒帧(可以称为“WB”)，则该WB用于唤醒多个第二设备能够接收第一设备发送的多个数据帧中对应于每个第二设备的数据帧。这时，第一设备可以确定该多个数据帧的信道接入等级中的最高信道接入等级(表示为第一信道接入等级)，该最高信道接入等级对应的EDCA参数集(表示为第二EDCA参数集)。这样第一设备可以将该第二EDCA参数集确定为唤醒帧的EDCA参数集。也就是说，对于能够唤醒多个第二设备的唤醒帧，可以根据更高的优先级的EDCA参数集进行信道竞争。
例如，如表1所示，若针对多个第二设备的多个数据帧的信道接入等级包括AC_VI，AC_BK和AC_BE这三种，则第一设备将AC_VI(即这三种信道接入等级中的最高信道接入等级)对应的参数集确定为WB的EDCA参数集。
可选地，作为一个实施例，该第一设备确定唤醒帧的EDCA参数集包括：该第一设备将系统最高信道接入等级对应的EDCA参数集确定为该唤醒帧的EDCA参数集。
可选地，第一设备还可以将任意接入等级对应的EDCA参数集确定为该唤醒帧的EDCA参数集。
无论该唤醒帧是针对一个第二设备的IWP，还是针对多个第二设备的WB，第一设备都可以将系统中的最高信道接入等级或任意接入等级对应的EDCA参数集作为唤醒帧的EDCA参数集，使得每个唤醒帧都能够得到高优先级的信道竞争服务，或其他合适的信道服务。
例如，对于WB，第一设备可以直接将AC_VO(即系统中的最高信道接入等级)对应的参数集确定为WB的EDCA参数集。
应理解，第一设备还可以为唤醒帧专门配置EDCA参数集，即对应于不同第二设备的唤醒帧分别有相应的EDCA参数集，本申请对此不进行限定。
702、该第一设备根据该唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态。
第一设备根据唤醒帧的EDCA参数集确定信道资源是否空闲，也可以称为第一设备根据唤醒帧的EDCA参数集中的各个参数进行退避(如图5和图6)，退避成功即为成功竞争到信道。
可选地，该唤醒帧的EDCA参数集包括竞争窗口时长和帧间隔时长；其中，该第一设备根据该唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态包括：该第一设备在该竞争窗口时长和该帧间隔时长内该信道资源空闲时，确定该信道资源处于空闲状态。
具体而言，唤醒帧的EDCA参数集包括竞争窗口时长和帧间隔时长。具体地，竞争窗口时长包括竞争窗口时长最小值和竞争窗口时长最大值。具体的实现过程可以如图5所示，STA需要回退的随机回退时间为一个随机回退的值乘以每个时隙的时间。其中随机回退的值是从一个均匀分布的窗口[0，CW]当中随机选择的。CW存在多个值，初始化进行首次尝试的时候为最小值，即CWmin，而每一次发生冲突时需要进行重传，CW就逐次增大，直到达到CW的最大值，即CWmax。而当成功发送数据时，CW被重置(reset)为CWmin。
帧间间隔时长可以是DIFS、PIFS、SIFS或者AIFS等。第一设备确定信道在帧间隔时长后处于空闲时，根据目标竞争窗口时长确定退避时长。第一设备可以将目标竞争窗口时长确定为退避时长，并通过退避计时器开始倒计时，若信道繁忙时退避计时器需要挂起(即停止计时)，直到计时结束。若信道资源仍然是空闲时，则确定信道资源是处于空闲状态，否则认为信道资源为繁忙状态。
可选地，作为一个实施例，该唤醒帧的EDCA参数集包括帧间隔时长；其中，该第一设备根据该唤醒帧的EDCA参数集，确定信道资源是否空闲包括：该第一设备根据该帧间隔时长内该信道资源是否处于空闲状态，确定该信道资源是否处于空闲状态。
具体而言，第一设备可以根据唤醒帧的EDCA参数集包括的帧间隔时长确定信道资源是否空闲，即第一设备在帧间隔时长内确定信道资源空闲就可以认为信道资源处于空闲状态，进而第一设备可以立即向第二设备发送唤醒帧。
应注意，该帧间间隔可以是是DIFS、PIFS、SIFS或者AIFS中的任意一个，本申请对此不进行限定。
703、该第一设备在该信道资源处于空闲状态时，向该第二设备发送该唤醒帧。
第二设备通过WUR模块接收到唤醒帧后，向主收发模块发送唤醒信号，使得主收发模块处于苏醒状态，从而能够接收第一设备发送的数据帧。
因此，本申请实施例的传输唤醒帧的方法，第一设备确定唤醒帧的EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧，根据该唤醒帧的EDCA参数集确定信道资源是否处于空闲状态，并在信道资源处于空闲状态时向第二设备发送唤醒帧，这样第一设备能够根据唤醒帧对应的EDCA参数集进行信道资源竞争，使得优先级高的唤醒帧能够得到高优先级的服务，从而提高了唤醒帧的QoS性能。
图8示出了根据本申请另一个实施例的传输唤醒帧的方法的示意性流程图。
801、第一设备向至少一个第二设备发送指示信息，该指示信息用于指示第一设备发送唤醒帧的第一时间。
该第一时间可以是具体的一个或多个时间点，也可以是一个或多个时间段，本申请对此不进行限定。
可选地，该指示信息包括时间信息和帧类型信息，该时间信息指示该第一时间，该帧类型信息指示该第一设备在该第一时间发送的帧类型为该唤醒帧。
第一设备向至少一个第二设备发送指示信息，该指示信息包括时间信息和帧类型信息。时间信息即第一设备准备在该时间信息指示的时间发送数据帧，而帧类型信息用于指示第一设备在时间信息指示的时间发送的数据帧的帧类型。也就是说，该时间信息和帧类型信息具有对应关系。
可选地，该第一设备向该至少一个第二设备发送该指示信息包括：该第一设备向该至少一个第二设备发送目标唤醒时间TWT信息，该TWT信息携带该指示信息。
第一设备向至少一个第二设备发送指示信息可以通过TWT信息携带。802.ax系统中的TWT信息的结构如图10和图11所示，其中时间信息在TWT信息中的位置为如图10中的唤醒时间，帧类型信息在TWT信息中的位置为如图10中的请求类型。
应理解，第二设备还可以通过广播帧或者是信标帧等携带该指示信息，本申请对此不进行限定。
可选地，指示信息可以包括时段长度和起始时刻。
在第一时间为时间段时，第一设备可以确定发送唤醒帧的起始时刻和时段长度等，并发送给第二设备，通过起始时刻和时段长度指示该第一时间。
可选地，该指示信息可以包括时间周期、时段长度和起始时刻。第一设备发送该唤醒帧可以是周期性的发送，并将该时间周期通过指示信息发送给第二设备。
应理解，用于指示第一设备发送唤醒帧的第一时间的时间周期、时段长度和起始时间可以通过同一个指示信息指示，也可以分别通过指示信息指示。例如，广播帧的结构如图9所示，广播帧中的I1用于指示时间段出现的周期，I2用于指示每个时间段的长度，I3用于指示时间段的起始时刻。
802、第二设备根据第一时间，确定接收该唤醒帧的第二时间。
第二设备根据指示信息可以在第一设备发送唤醒帧的起始时刻醒来，也可以提前醒来准备接收唤醒帧，保证唤醒帧接收的准确性；或者可以准确的计算出第一设备与第二设备之间的时延后，延后该时延再醒来，节省第二设备的功耗。
应理解，该第二时间可以是具体的一个或多个时间点，也可以是一个或多个时间段，该第二时间还可以与该第一时间相同，本申请对此不进行限定。
可选地，该帧类型信息包括至少一个比特，该至少一个比特的取值用于指示该第一设备在该第一时间发送的帧类型是否为该唤醒帧，在该第二设备根据该第一时间确定接收该唤醒帧的第二时间之前，该方法还包括：该第二设备根据该至少一个比特的取值，确定该第一时间为该第一设备发送该唤醒帧的时间。
具体而言，帧类型信息可以通过至少一个比特表示，特别是该指示信息携带在TWT信息中时，第二设备可以复用TWT信息中TWT标识的预留值。
根据TWT标识的预留值确定第一设备在时间信息指示的时间发送的帧类型是否是唤醒帧，也就是说，第二设备确定指示信息指示的第一时间是否是第一设备用来发送唤醒帧的。若该第一时间是第一设备用来发送唤醒帧的，则第二设备根据该第一时间确定接收唤醒帧的第二时间。
802.ax系统中的TWT信息的结构如图10所示，具体的请求类型结构如图11所示，且至少一个比特对应于TWT标识，以3个比特对应于TWT标识为例进行说明，TWT标识的取值可以如下表2所示。
表2
Figure PCTCN2017105647-appb-000001
由表2可知，TWT标识的比特取值从3～7为保留字段，本申请实施例可以复用该保留字段，配置预留字段与唤醒帧的映射关系。例如，配置TWT标识的取值为3表示该第一设备在第一时间发送的帧类型为唤醒帧(如表3所示)，这样第二设备就可以根据第一时间确定接收唤醒帧的第二时间，从而第二设备能够准确的接收到唤醒帧。
表3
TWT标识的取值 帧类型描述
3～7中任一值 在TWT服务阶段，传输的帧类型为唤醒帧
803、第一设备在该第一时间发送该唤醒帧。
第一设备按照指示给第二设备的时间(表示为第一时间)发送唤醒帧。
需要说明的是，第一设备在发送唤醒帧之前，还可以向第二设备发送信道预留帧来预留信道，确保唤醒帧能够发送出去。该信道预留帧可以是清空以便发送(clear to send，CTS)帧，该信道预留帧还可以携带NAV信息。
804、第二设备在该第二时间接收该唤醒帧。
第二设备在第二时间苏醒接收该唤醒帧，也就是说，第一设备可以提前与第二设备协商发送唤醒帧的时间，便于第二设备在协商好的时间内醒来接收唤醒帧，避免了第二设备的WUR模块一直处于监听状态，从而进一步节省了第二设备的功耗。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的 先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
因此，本申请实施例的传输唤醒帧的方法，第一设备向第二设备发送用于指示第一设备发送唤醒帧的第一时间的指示信息，第二设备根据该指示信息确定接收唤醒帧的第二时间，第二设备在第二时间接收第一设备在第一时间发送的唤醒帧，这样第一设备通过提前告知第二设备发送唤醒帧的时间，使得第二设备能够根据第一时间确定的第二时间准确的接收到唤醒帧，从而提高了唤醒帧的QoS性能。
上文中详细描述了根据本申请实施例的传输唤醒帧的方法，下面将描述根据本申请实施例的传输唤醒帧的设备。
图12示出了根据本申请实施例的第一设备1100的示意性框图。如图12所示，该第一设备1100包括：
处理模块1110，用于确定唤醒帧的增强型分布式信道接入EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧；
该处理模块1110，还用于根据该唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态；
发送模块1120，用于在该信道资源处于空闲状态时，向该第二设备发送该唤醒帧。
因此，本申请实施例的第一设备，通过确定唤醒帧的EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧，根据该唤醒帧的EDCA参数集确定信道资源是否处于空闲状态，并在信道资源处于空闲状态时向第二设备发送唤醒帧，这样第一设备能够根据唤醒帧对应的EDCA参数集进行信道资源竞争，使得优先级高的唤醒帧能够得到高优先级的服务，从而提高了唤醒帧的QoS性能。
可选地，在该唤醒帧用于唤醒一个该第二设备接收该第一设备发送的第一数据帧时，该处理模块，还用于确定该第一数据帧的信道接入等级，该第一数据帧的信道接入等级对应第一EDCA参数集；该处理模块具体用于：将该第一EDCA参数集确定为该唤醒帧的EDCA参数集。
可选地，在该唤醒帧用于唤醒多个该第二设备中的每个第二设备接收该第一设备发送的多个数据帧中与该每个第二设备对应的数据帧时，该处理模块，还用于确定该多个数据帧的信道接入等级中的第一信道接入等级，该第一信道接入等级对应第二EDCA参数集，该第一信道接入等级为该多个数据帧的信道接入等级中的最高信道接入等级；该处理模块具体用于：将该第二EDCA参数集确定为该唤醒帧的EDCA参数集。
可选地，该处理模块具体用于：将系统最高信道接入等级对应的EDCA参数集确定为该唤醒帧的EDCA参数集。
可选地，该唤醒帧的EDCA参数集包括竞争窗口时长和帧间隔时长；该处理模块具体用于：根据该竞争窗口时长确定退避时长；根据该退避时长和该帧间隔时长，确定该信道资源处于空闲状态。
可选地，该唤醒帧的EDCA参数集包括帧间隔时长；该处理模块具体用于：根据该帧间隔时长，确定该信道资源处于空闲状态。
根据本申请实施例的第一设备可对应于根据本申请实施例的传输唤醒帧的方法的第一设备，并且第一设备中的各个模块的上述和其它操作和/或功能分别为了实现前述各个 方法的相应流程，为了简洁，在此不再赘述。
因此，本申请实施例的第一设备，通过确定唤醒帧的EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧，根据该唤醒帧的EDCA参数集确定信道资源是否处于空闲状态，并在信道资源处于空闲状态时向第二设备发送唤醒帧，这样第一设备能够根据唤醒帧对应的EDCA参数集进行信道资源竞争，使得优先级高的唤醒帧能够得到高优先级的服务，从而提高了唤醒帧的QoS性能。
图13示出了根据本申请实施例的第一设备1200的示意性框图。如图13所示，该第一设备1200包括：
发送模块1210，用于向至少一个第二设备发送指示信息，该指示信息指示该第一设备发送唤醒帧的第一时间；
该发送模块1210，还用于在该第一时间，发送该唤醒帧。
因此，本申请实施例的第一设备，通过向第二设备向第二设备发送用于指示第一设备发送唤醒帧的第一时间的指示信息，再在第一时间发送向第二设备发送唤醒帧，这样第一设备通过提前告知第二设备发送唤醒帧的时间，使得第二设备能够在根据第一时间准确的接收到唤醒帧，从而提高了唤醒帧的QoS性能。
可选地，该指示信息包括时间信息和帧类型信息，该时间信息指示该第一时间，该帧类型信息指示该第一设备在该第一时间发送的帧类型为该唤醒帧。
可选地，该发送模块1210具体用于：该第一设备向该至少一个第二设备发送目标唤醒时间TWT信息，该TWT信息携带该指示信息。
可选地，该帧类型信息包括至少一个比特，该至少一个比特的取值用于指示该第一设备在该第一时间发送的帧类型是否为该唤醒帧。
可选地，该时间信息包括时段长度和起始时刻。
可选地，该时间信息包括时间周期、时段长度和起始时刻。
因此，本申请实施例的第一设备，通过向第二设备向第二设备发送用于指示第一设备发送唤醒帧的第一时间的指示信息，再在第一时间发送向第二设备发送唤醒帧，这样第一设备通过提前告知第二设备发送唤醒帧的时间，使得第二设备能够在根据第一时间准确的接收到唤醒帧，从而提高了唤醒帧的QoS性能。
根据本申请实施例的第一设备可对应于根据本申请实施例的传输唤醒帧的方法的第一设备，并且第一设备中的各个模块的上述和其它操作和/或功能分别为了实现前述各个方法的相应流程，为了简洁，在此不再赘述。
图14示出了根据本申请实施例的第二设备1300的示意性框图。如图14所示，该第二设备1300包括：
接收模块1310，用于接收第一设备发送的指示信息，该指示信息指示该第一设备发送唤醒帧的第一时间；
处理模块1320，用于根据该第一时间，确定接收该唤醒帧的第二时间；
该接收模块1310，还用于在该第二时间，接收该唤醒帧。
因此，本申请实施例的第二设备，通过接收第一设备发送用于指示第一设备发送唤醒帧的第一时间的指示信息，根据该指示信息确定接收唤醒帧的第二时间，第二设备在第二时间接收第一设备在第一时间发送的唤醒帧，这样第二设备通过接收第一设备提前告知的 发送唤醒帧的时间，使得第二设备能够根据第一时间确定的第二时间准确的接收到唤醒帧，从而提高了唤醒帧的QoS性能。
可选地，该指示信息包括时间信息和帧类型信息，该时间信息指示该第一时间，该帧类型信息指示该第一设备在该第一时间发送的帧类型为该唤醒帧。
可选地，该接收模块1310具体用于：接收该第一设备发送的目标唤醒时间TWT信息，该TWT信息携带该指示信息。
可选地，该帧类型信息包括至少一个比特，该至少一个比特的取值用于指示该第一设备在该第一时间发送的帧类型是否为该唤醒帧，该处理模块还用于根据该至少一个比特的取值，确定该第一时间为该第一设备发送该唤醒帧的时间。
可选地，该时间信息包括时段长度和起始时刻。
可选地，该时间信息包括时间周期、时段长度和起始时刻。
根据本申请实施例的第二设备可对应于根据本申请实施例的传输唤醒帧的方法的第二设备，并且第二设备中的各个模块的上述和其它操作和/或功能分别为了实现前述各个方法的相应流程，为了简洁，在此不再赘述。
因此，本申请实施例的第二设备，通过接收第一设备发送用于指示第一设备发送唤醒帧的第一时间的指示信息，根据该指示信息确定接收唤醒帧的第二时间，第二设备在第二时间接收第一设备在第一时间发送的唤醒帧，这样第二设备通过接收第一设备提前告知的发送唤醒帧的时间，使得第二设备能够根据第一时间确定的第二时间准确的接收到唤醒帧，从而提高了唤醒帧的QoS性能。
图15示出了本申请实施例的传输唤醒帧的系统1400，该系统1400包括：
如图12所示的实施例中的第一设备1100和第二设备1410。
图16示出了本申请实施例的传输唤醒帧的系统1500，该系统1500包括：
如图13所示的实施例中的第一设备1200和图14所示的实施例中的第二设备1300。
图17示出了本申请的实施例提供的第一设备的结构示意图。如图17所示，该第一设备包括至少一个处理器1602(例如具有计算和处理能力的通用处理器CPU、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)等)，处理器1602用于对第一设备内各模块和器件进行管理和调度。图12所示的实施例中的处理模块1110可以通过处理器1602实现。该第一设备还包括至少一个收发器1605(接收器/发送器1605)，存储器1606，和至少一个总线系统1603。图12所示的实施例中的发送模块1120可以通过收发器1605实现。第一设备的各个组件通过总线系统1603耦合在一起，其中总线系统1603可能包括数据总线、电源总线、控制总线和状态信号总线等，但是为了清楚说明起见，在图中将各种总线都标为总线系统1603。
上述本申请实施例揭示的方法可以应用于处理器1602，或者用于执行存储器1606中存储的可执行模块，例如计算机程序。存储器1606可能包含高速随机存取存储器(Random Access Memory，RAM)，也可能还包括非不稳定的存储器(non-volatile memory)，存储器可以包括只读存储器和随机存取存储器，并向处理器提供需要的信令或数据、程序等等。存储器的一部分还可以包括非易失行随机存取存储器(NVRAM)。通过至少一个收发器1605(可以是有线或者无线)实现与至少一个其他网元之间的通信连接。
在一些实施方式中，存储器1606存储了程序16061，处理器1602执行程序16061， 用于执行以下操作：
确定唤醒帧的EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧；
根据该唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态；
通过收发器1605在该信道资源处于空闲状态时，向该第二设备发送该唤醒帧。
需要说明的是，该第一设备可以具体为图7所示的实施例中的第一设备，并且可以用于执行图7所示的方法实施例中与第一设备对应的各个步骤和/或流程。
从本申请实施例提供的以上技术方案可以看出，通过确定唤醒帧的EDCA参数集，该唤醒帧用于唤醒一个或多个第二设备接收数据帧，根据该唤醒帧的EDCA参数集确定信道资源是否处于空闲状态，并在信道资源处于空闲状态时向第二设备发送唤醒帧，这样第一设备能够根据唤醒帧对应的EDCA参数集进行信道资源竞争，使得优先级高的唤醒帧能够得到高优先级的服务，从而提高了唤醒帧的QoS性能。
图18示出了本申请的实施例提供的第一设备的结构示意图。如图18所示，该第一设备包括至少一个收发器1705(接收器/发送器1705)。图13所示的实施例中的发送模块1210可以通过收发器1705实现。该第一设备还包括至少一个处理器1702(例如具有计算和处理能力的通用处理器CPU、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)等)，存储器1706，和至少一个总线系统1703，处理器1702用于对第一设备内各模块和器件进行管理和调度。第一设备的各个组件通过总线系统1703耦合在一起，其中总线系统1703可能包括数据总线、电源总线、控制总线和状态信号总线等，但是为了清楚说明起见，在图中将各种总线都标为总线系统1703。
上述本申请实施例揭示的方法可以应用于处理器1702，或者用于执行存储器1706中存储的可执行模块，例如计算机程序。存储器1706可能包含高速随机存取存储器(Random Access Memory，RAM)，也可能还包括非不稳定的存储器(non-volatile memory)，存储器可以包括只读存储器和随机存取存储器，并向处理器提供需要的信令或数据、程序等等。存储器的一部分还可以包括非易失行随机存取存储器(NVRAM)。通过至少一个收发器1705(可以是有线或者无线)实现与至少一个其他网元之间的通信连接。
在一些实施方式中，存储器1706存储了程序17061，处理器1702执行程序17061，用于执行以下操作：
通过收发器1705接收第一设备发送的指示信息，该指示信息指示该第一设备发送唤醒帧的第一时间；
通过收发器1705在该第一时间，发送该唤醒帧。
需要说明的是，该第一设备可以具体为图8所示的实施例中的第一设备，并且可以用于执行图8所示的方法实施例中与第一设备对应的各个步骤和/或流程。
从本申请实施例提供的以上技术方案可以看出，通过向第二设备向第二设备发送用于指示第一设备发送唤醒帧的第一时间的指示信息，再在第一时间发送向第二设备发送唤醒帧，这样第一设备通过提前告知第二设备发送唤醒帧的时间，使得第二设备能够在根据第一时间准确的接收到唤醒帧，从而提高了唤醒帧的QoS性能。
图19示出了本申请的实施例提供的第二设备的结构示意图。如图19所示，该第二设备包括至少一个处理器1802(例如具有计算和处理能力的通用处理器CPU、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)等)，处理器1802 用于对第二设备内各模块和器件进行管理和调度。图14所示的实施例中的处理模块1320可以通过处理器1802实现。该第一设备还包括至少一个收发器1805(接收器/发送器1805)，存储器1806，和至少一个总线系统1803。图14所示的实施例中的接收模块1310可以通过收发器1805实现。第二设备的各个组件通过总线系统1803耦合在一起，其中总线系统1803可能包括数据总线、电源总线、控制总线和状态信号总线等，但是为了清楚说明起见，在图中将各种总线都标为总线系统1803。
上述本申请实施例揭示的方法可以应用于处理器1802，或者用于执行存储器1806中存储的可执行模块，例如计算机程序。存储器1806可能包含高速随机存取存储器(Random Access Memory，RAM)，也可能还包括非不稳定的存储器(non-volatile memory)，存储器可以包括只读存储器和随机存取存储器，并向处理器提供需要的信令或数据、程序等等。存储器的一部分还可以包括非易失行随机存取存储器(NVRAM)。通过至少一个收发器1805(可以是有线或者无线)实现与至少一个其他网元之间的通信连接。
在一些实施方式中，存储器1806存储了程序18061，处理器1802执行程序18061，用于执行以下操作：
通过收发器1805接收第一设备发送的指示信息，该指示信息指示该第一设备发送唤醒帧的第一时间；
根据该接收模块接收的该第一时间，确定接收该唤醒帧的第二时间；
通过收发器1805在该第二时间，接收该唤醒帧。
需要说明的是，该第一设备可以具体为图8所示的实施例中的第二设备，并且可以用于执行图8所示的方法实施例中与第二设备对应的各个步骤和/或流程。
从本申请实施例提供的以上技术方案可以看出，通过接收第一设备发送用于指示第一设备发送唤醒帧的第一时间的指示信息，根据该指示信息确定接收唤醒帧的第二时间，第二设备在第二时间接收第一设备在第一时间发送的唤醒帧，这样第二设备通过接收第一设备提前告知的发送唤醒帧的时间，使得第二设备能够根据第一时间确定的第二时间准确的接收到唤醒帧，从而提高了唤醒帧的QoS性能。
本申请实施例还提供一种计算机存储介质，该计算机存储介质可以存储用于指示上述任一种方法的程序指令。
可选地，该存储介质具体可以为存储器1606、1706或1806。
应理解，本申请中的具体的例子只是为了帮助本领域技术人员更好地理解本申请实施例，而非限制本申请实施例的范围。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可 以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，该单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以该权利要求的保护范围为准。

Claims (36)

  1. 一种传输唤醒帧的方法，其特征在于，包括：
    第一设备确定唤醒帧的增强型分布式信道接入EDCA参数集，所述唤醒帧用于唤醒一个或多个第二设备接收数据帧；
    所述第一设备根据所述唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态；
    所述第一设备在所述信道资源处于空闲状态时，向所述第二设备发送所述唤醒帧。
  2. 根据权利要求1所述的方法，其特征在于，在所述唤醒帧用于唤醒一个所述第二设备接收所述第一设备发送的第一数据帧时，所述方法还包括：
    所述第一设备确定所述第一数据帧的信道接入等级，所述第一数据帧的信道接入等级对应第一EDCA参数集；
    其中，所述第一设备确定唤醒帧的EDCA参数集包括：
    所述第一设备将所述第一EDCA参数集确定为所述唤醒帧的EDCA参数集。
  3. 根据权利要求1所述的方法，其特征在于，在所述唤醒帧用于唤醒多个所述第二设备中的每个第二设备接收所述第一设备发送的多个数据帧中与所述每个第二设备对应的数据帧时，所述方法还包括：
    所述第一设备确定所述多个数据帧的信道接入等级中的第一信道接入等级，所述第一信道接入等级对应第二EDCA参数集，所述第一信道接入等级为所述多个数据帧的信道接入等级中的最高信道接入等级；
    其中，所述第一设备确定唤醒帧的EDCA参数集包括：
    所述第一设备将所述第二EDCA参数集确定为所述唤醒帧的EDCA参数集。
  4. 根据权利要求1所述的方法，其特征在于，所述第一设备确定唤醒帧的EDCA参数集包括：
    所述第一设备将系统最高信道接入等级对应的EDCA参数集确定为所述唤醒帧的EDCA参数集。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述唤醒帧的EDCA参数集包括竞争窗口时长和帧间隔时长；
    其中，所述第一设备根据所述唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态包括：
    所述第一设备根据所述竞争窗口时长，确定退避时长；
    所述第一设备根据所述帧间隔时长和所述退避时长，确定所述信道资源是否处于空闲状态。
  6. 根据权利要求1至4中任一项所述的方法，其特征在于，所述唤醒帧的EDCA参数集包括帧间隔时长；
    其中，所述第一设备根据所述唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态包括：
    所述第一设备根据所述帧间隔时长，确定所述信道资源是否处于空闲状态。
  7. 一种传输唤醒帧的方法，其特征在于，包括：
    第一设备向至少一个第二设备发送指示信息，所述指示信息指示所述第一设备发送唤醒帧的第一时间；
    所述第一设备在所述第一时间，发送所述唤醒帧。
  8. 根据权利要求7所述的方法，其特征在于，所述指示信息包括时间信息和帧类型信息，所述时间信息指示所述第一时间，所述帧类型信息指示所述第一设备在所述第一时间发送的帧类型为所述唤醒帧。
  9. 根据权利要求8所述的方法，其特征在于，所述第一设备向所述至少一个第二设备发送所述指示信息包括：
    所述第一设备向所述至少一个第二设备发送目标唤醒时间TWT信息，所述TWT信息携带所述指示信息。
  10. 根据权利要求8或9所述的方法，其特征在于，所述帧类型信息包括至少一个比特，所述至少一个比特的取值用于指示所述第一设备在所述第一时间发送的帧类型是否为所述唤醒帧。
  11. 根据权利要求8至10中任一项所述的方法，其特征在于，所述时间信息包括时段长度和起始时刻。
  12. 根据权利要求8至10中任一项所述的方法，其特征在于，所述时间信息包括时间周期、时段长度和起始时刻。
  13. 一种传输唤醒帧的方法，其特征在于，包括：
    第二设备接收第一设备发送的指示信息，所述指示信息指示所述第一设备发送唤醒帧的第一时间；
    所述第二设备根据所述第一时间，确定接收所述唤醒帧的第二时间；
    所述第二设备在所述第二时间，接收所述唤醒帧。
  14. 根据权利要求13所述的方法，其特征在于，所述指示信息包括时间信息和帧类型信息，所述时间信息指示所述第一时间，所述帧类型信息指示所述第一设备在所述第一时间发送的帧类型为所述唤醒帧。
  15. 根据权利要求14所述的方法，其特征在于，所述第二设备接收第一设备发送的指示信息包括：
    所述第二设备接收所述第一设备发送的目标唤醒时间TWT信息，所述TWT信息携带所述指示信息。
  16. 根据权利要求14或15所述的方法，其特征在于，所述帧类型信息包括至少一个比特，所述至少一个比特的取值用于指示所述第一设备在所述第一时间发送的帧类型是否为所述唤醒帧，在所述第二设备根据所述第一时间确定接收所述唤醒帧的第二时间之前，所述方法还包括：
    所述第二设备根据所述至少一个比特的取值，确定所述第一时间为所述第一设备发送所述唤醒帧的时间。
  17. 根据权利要求14至16中任一项所述的方法，其特征在于，所述时间信息包括时段长度和起始时刻。
  18. 根据权利要求14至16中任一项所述的方法，其特征在于，所述时间信息包括时间周期、时段长度和起始时刻。
  19. 一种第一设备，其特征在于，包括：
    处理模块，用于确定唤醒帧的增强型分布式信道接入EDCA参数集，所述唤醒帧用于唤醒一个或多个第二设备接收数据帧；
    所述处理模块，还用于根据所述唤醒帧的EDCA参数集，确定信道资源是否处于空闲状态；
    发送模块，用于在所述信道资源处于空闲状态时，向所述第二设备发送所述唤醒帧。
  20. 根据权利要求19所述的第一设备，其特征在于，在所述唤醒帧用于唤醒一个所述第二设备接收所述第一设备发送的第一数据帧时，所述处理模块，还用于确定所述第一数据帧的信道接入等级，所述第一数据帧的信道接入等级对应第一EDCA参数集；
    所述处理模块具体用于：
    将所述第一EDCA参数集确定为所述唤醒帧的EDCA参数集。
  21. 根据权利要求19所述的第一设备，其特征在于，在所述唤醒帧用于唤醒多个所述第二设备中的每个第二设备接收所述第一设备发送的多个数据帧中与所述每个第二设备对应的数据帧时，所述处理模块，还用于确定所述多个数据帧的信道接入等级中的第一信道接入等级，所述第一信道接入等级对应第二EDCA参数集，所述第一信道接入等级为所述多个数据帧的信道接入等级中的最高信道接入等级；
    所述处理模块具体用于：
    将所述第二EDCA参数集确定为所述唤醒帧的EDCA参数集。
  22. 根据权利要求19所述的第一设备，其特征在于，所述处理模块具体用于：
    将系统最高信道接入等级对应的EDCA参数集确定为所述唤醒帧的EDCA参数集。
  23. 根据权利要求19至22中任一项所述的第一设备，其特征在于，所述唤醒帧的EDCA参数集包括竞争窗口时长和帧间隔时长；
    所述处理模块具体用于：
    根据所述竞争窗口时长，确定退避时长；
    根据所述退避时长和所述帧间隔时长，确定所述信道资源是否处于空闲状态。
  24. 根据权利要求19至22中任一项所述的第一设备，其特征在于，所述唤醒帧的EDCA参数集包括帧间隔时长；
    所述处理模块具体用于：
    根据所述帧间隔时长，确定所述信道资源是否处于空闲状态。
  25. 一种传输唤醒帧的第一设备，其特征在于，包括：
    发送模块，用于向至少一个第二设备发送指示信息，所述指示信息指示所述第一设备发送唤醒帧的第一时间；
    所述发送模块，还用于在所述第一时间，发送所述唤醒帧。
  26. 根据权利要求25所述的第一设备，其特征在于，所述指示信息包括时间信息和帧类型信息，所述时间信息指示所述第一时间，所述帧类型信息指示所述第一设备在所述第一时间发送的帧类型为所述唤醒帧。
  27. 根据权利要求26所述的第一设备，其特征在于，所述发送模块具体用于：
    向所述至少一个第二设备发送目标唤醒时间TWT信息，所述TWT信息携带所述指示信息。
  28. 根据权利要求26或27所述的第一设备，其特征在于，，所述帧类型信息包括至少一个比特，所述至少一个比特的取值用于指示所述第一设备在所述第一时间发送的帧类型是否为所述唤醒帧。
  29. 根据权利要求26至28中任一项所述的第一设备，其特征在于，所述时间信息包括时段长度和起始时刻。
  30. 根据权利要求21所述的第一设备，其特征在于，所述时间信息包括时间周期、时段长度和起始时刻。
  31. 一种传输唤醒帧的第二设备，其特征在于，包括：
    接收模块，用于接收第一设备发送的指示信息，所述指示信息指示所述第一设备发送唤醒帧的第一时间；
    处理模块，用于根据所述第一时间，确定接收所述唤醒帧的第二时间；
    所述接收模块，还用于在所述第二时间，接收所述唤醒帧。
  32. 根据权利要求31所述的第二设备，其特征在于，所述指示信息包括时间信息和帧类型信息，所述时间信息指示所述第一时间，所述帧类型信息指示所述第一设备在所述第一时间发送的帧类型为所述唤醒帧。
  33. 根据权利要求32所述的第二设备，其特征在于，所述接收模块具体用于：
    接收所述第一设备发送的目标唤醒时间TWT信息，所述TWT信息携带所述指示信息。
  34. 根据权利要求32或33所述的第二设备，其特征在于，所述帧类型信息包括至少一个比特，所述至少一个比特的取值用于指示所述第一设备在所述第一时间发送的帧类型是否为所述唤醒帧，所述处理模块还用于根据所述至少一个比特的取值，确定所述第一时间为所述第一设备发送所述唤醒帧的时间。
  35. 根据权利要求32至34中任一项所述的第二设备，其特征在于，所述时间信息包括时段长度和起始时刻。
  36. 根据权利要求32至34中任一项所述的第二设备，其特征在于，所述时间信息包括时间周期、时段长度和起始时刻。
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