WO2018196799A1 - 无线接入点、终端设备及无线接入点唤醒终端设备的方法 - Google Patents

无线接入点、终端设备及无线接入点唤醒终端设备的方法 Download PDF

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Publication number
WO2018196799A1
WO2018196799A1 PCT/CN2018/084581 CN2018084581W WO2018196799A1 WO 2018196799 A1 WO2018196799 A1 WO 2018196799A1 CN 2018084581 W CN2018084581 W CN 2018084581W WO 2018196799 A1 WO2018196799 A1 WO 2018196799A1
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WO
WIPO (PCT)
Prior art keywords
channel
frame
terminal device
wake
wur
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Application number
PCT/CN2018/084581
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English (en)
French (fr)
Inventor
季晨荷
庄艳
王云贵
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2019558532A priority Critical patent/JP6961013B2/ja
Priority to EP18791924.6A priority patent/EP3609242A4/en
Priority to BR112019022441-6A priority patent/BR112019022441A2/pt
Publication of WO2018196799A1 publication Critical patent/WO2018196799A1/zh
Priority to PH12019502422A priority patent/PH12019502422A1/en
Priority to US16/665,270 priority patent/US11153823B2/en
Priority to US17/480,456 priority patent/US11751137B2/en

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Classifications

    • 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
    • H04W52/0229—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
    • 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
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • 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
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/028—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • 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 in particular, to a method for a line access point, a terminal device, and a wireless access point to wake up a terminal device.
  • a terminal device in a wireless local area network can enter a sleep mode (English: sleep mode). However, even the terminal device in the sleep mode often enters the awake state (English: awake state) from the doze state to receive data.
  • a sleep mode English: sleep mode
  • awake state English: awake state
  • the application provides a terminal device, a wake-up method thereof and a wireless access point, so as to reduce power consumption of the terminal device.
  • a terminal device including a main radio frequency circuit and a wake-up radio (WUR) radio frequency circuit.
  • the WUR radio frequency circuit is configured to receive only wireless signals and operate on a designated channel.
  • the WUR radio frequency circuit is further configured to wake up the main radio frequency circuit if a wake-up frame is received on the designated channel and the terminal device is a terminal device to be woken up.
  • the wakeup frame includes an identifier of the terminal device to be woken up.
  • the primary radio frequency circuit is configured to operate on a working channel of the primary radio frequency circuit after being woken up.
  • the WUR RF circuit is a radio frequency circuit other than the main RF circuit in the terminal device.
  • the WUR RF circuit only has the ability to receive wireless signals and cannot transmit wireless signals.
  • the WUR radio frequency circuit is only used to receive frames (WUR frames) related to the wake-up operation, while ignoring other frames (such as WLAN data). Therefore, the power consumption and complexity of the WUR RF circuit are very low.
  • the WUR RF circuit can consume less than 100 microwatts ( ⁇ W) when operating.
  • ⁇ W microwatts
  • the WUR RF circuit operates on the designated channel. WUR RF circuits do not require frequent switching of channels. Since the other WLAN device knows the designated channel, the wake-up frame can be transmitted on the designated channel.
  • the WUR RF circuit can receive the wake-up frame when it operates on the specified channel, so that the main RF circuit can be woken up.
  • the primary radio frequency circuit is further configured to receive information of a designated channel of the WUR radio frequency circuit on a working channel of the primary radio frequency circuit. If the designated channel is dynamically negotiated, or the terminal device does not know the designated channel, the WLAN device can inform the terminal device of the designated channel.
  • the operating frequency band of the primary radio frequency circuit and the operating frequency band of the WUR radio frequency circuit are the same.
  • the available working channel of the primary radio frequency circuit is outside the designated channel WLAN channel.
  • the difference between the working channel and the designated channel can reduce interference between channels.
  • the wake-up frame further includes an indication of the working channel
  • the primary radio frequency circuit is operative to operate on the working channel indicated by the wake-up frame after being woken up.
  • the wake-up frame indicates the working channel of the WLAN device that transmits the wake-up frame, which can reduce the burden of scanning the channel after the main radio frequency circuit is woken up.
  • the identifier of the terminal device to be woken up is a separate
  • the primary radio frequency circuit is further configured to send a response to the wake-up frame on a working channel that is subsequently indicated by the wake-up frame.
  • the terminal device responds to the wake-up frame to inform the WLAN device that it has been woken up. Since the WUR radio frequency circuit cannot transmit the wireless signal, the primary radio frequency circuit of the terminal device transmits a response to the wake-up frame on the working channel after being woken up.
  • the WUR radio frequency circuit is further configured to receive a WUR beacon frame, if The WUR beacon frame indicates a new designated channel and operates on the new designated channel. If the designated channel of the WLAN device is dynamic, the WLAN device may change the designated channel. In order for the terminal device to learn the change of the designated channel, the WLAN device notifies the terminal device of the new designated channel.
  • a terminal device waking method including the steps performed by the terminal device in the above first aspect.
  • a third aspect provides a method for waking up a terminal device, including: the WLAN device transmitting a wake-up frame on a designated channel, where the wake-up frame includes an identifier of the terminal device to be woken up.
  • the WLAN device transmits a WLAN frame on a working channel.
  • the method further includes: the WLAN device transmitting information of the designated channel on the working channel.
  • the available working channel of the WLAN device is a WLAN channel other than the designated channel.
  • the wake-up frame further includes an indication of the working channel.
  • the identifier of the terminal device to be awake is an identifier of a single terminal device.
  • the method further includes transmitting, by the WLAN device, a new wake-up frame on the designated channel if the WLAN device does not receive a response to the wake-up frame on the working channel.
  • the identifier of the terminal device to be woken up is a group identifier or a broadcast identifier
  • the WLAN frame is a group address frame
  • the WLAN device sends the WLAN frame on a working channel after a preparation period after sending the wake-up frame. If the WLAN device sends a wake-up frame identified as a group identity or a broadcast identity to wake up multiple terminal devices, the WLAN device does not need to confirm whether each WLAN device has been woken up.
  • the method further includes: the WLAN device is on the designated channel A wake-up radio (WUR) beacon frame is transmitted periodically, the transmission of the WUR beacon frame being independent of the transmission of the beacon frame on the working channel.
  • WUR wake-up radio
  • the WUR beacon frame includes an indication of the working channel.
  • the method further includes: the WLAN device changing the designated channel Previously, the WUR beacon frame is used to indicate the new designated channel.
  • the WLAN frequency band in which the designated channel is located and the WLAN in which the working channel is located The frequency band is the same.
  • an apparatus for waking up a terminal device having the function of implementing the behavior of the WLAN device in the method of the above third aspect.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • a WLAN device including a processor and a transceiver.
  • the processor is operative to transmit and receive wireless signals with the transceiver and perform the steps of the method of the third aspect above.
  • an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the WLAN device, which includes a program designed to perform the above aspects.
  • an embodiment of the present invention provides a computer storage medium for storing computer software instructions for use in the terminal device, which includes a program designed to perform the above aspects.
  • FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a WLAN device waking up a terminal device according to an embodiment of the present invention
  • FIG. 3 is an example of a terminal device moving in coverage of two WLAN devices according to an embodiment of the present invention.
  • FIG. 4 is another example of a terminal device moving in coverage of two WLAN devices according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an apparatus for waking up a terminal device according to an embodiment of the present invention.
  • WLAN devices In the IoT scenario, many devices are powered by batteries. Therefore, it is important to extend the life of the device (battery life).
  • the popularity of WLAN devices is high. If WLAN devices can be used to implement the functions required by IoT scenarios, the threshold for the popularity of Internet of Things can be lowered.
  • the WLAN device can enter sleep mode. However, even the terminal device in the sleep mode often goes from the doze state to the awake state to receive data of another WLAN device (for example, a wireless access point (AP) or other type of WLAN device). The longer the device stays in the doze state, the lower the energy consumed. And being in a doze state for a long time reduces the timeliness of data transmission.
  • AP wireless access point
  • the embodiment of the present invention sets a special wake-up radio outside the primary radio frequency (RF) circuit in the WLAN device.
  • RF radio frequency
  • the WLAN device in which the WUR radio frequency circuit is set is called a WUR terminal device or a terminal device.
  • the WUR RF circuit only has the ability to receive wireless signals and cannot transmit wireless signals.
  • the WUR radio frequency circuit is only used to receive frames related to wake-up operations (which may be referred to as WUR frames, such as WUR beacon frames or WUR wake-up frames), ignoring other frames (eg, data frames). Therefore, the power consumption and complexity of the WUR RF circuit are low.
  • the WUR RF circuit can consume less than 100 microwatts ( ⁇ W) when operating.
  • the main RF circuit and the WUR RF circuit can be independent or integrated into one chip.
  • the terminal device When there is no data transmission, the terminal device is in a sleep state. When the terminal device is in a sleep state, the main RF circuit is turned off to save energy. When the terminal device is in a sleep state, the WUR radio frequency circuit listens to the wireless medium to receive the wake-up frame in time. Alternatively, the WUR RF circuit can be suspended for further energy savings. For example, the WUR RF circuit can periodically suspend operation. Further, when the terminal device is in a sleep state, any device other than the WUR RF circuit in the entire device may be in a power-off state. If the terminal device includes a volatile memory, the volatile memory may not be in a power down state during a sleep state. Alternatively, the terminal device may copy the contents of the volatile memory to the non-volatile memory before entering the sleep state, and then turn off the volatile memory when entering the sleep state.
  • the wake-up frame is sent first. After receiving the wake-up frame, the WUR radio circuit of the terminal device to be woken up wakes up the main radio circuit of the terminal device. At this point, the terminal device is in the awake state. After transmitting the wake-up frame, the WLAN device resends the WLAN frame.
  • the WLAN frame can be a data frame or a management frame.
  • the data frame may include data transmitted by the WLAN device to the terminal device or an indication of the data of the inquiring terminal device.
  • adjacent wireless APs are generally set to work on different working channels (English: operating channels). If the wireless APs transmit WUR frames with their respective working channels, the channels in which the adjacent wireless APs transmit the WUR frames are different.
  • the WLAN band includes the 900 megahertz (MHz) band, the 2.4 GHz band, the 3.65 GHz band, the 4.9 GHz band, the 5 GHz band, the 5.9 GHz band, and the 60 GHz band.
  • the number of WLAN channels included in different WLAN bands is governed by national/regional regulations. For example, in the United States, there are 25 channels with a bandwidth of 20 MHz in the 5 GHz band. Since the terminal device does not know the working channel of the new wireless AP, the working channel of its WUR radio frequency circuit should be frequently switched to find the working channel of the new wireless AP among the 25 channels. Frequent channel switching increases the power consumption of the WUR RF circuit.
  • the WUR radio frequency circuit can hear the WUR frame sent by the new wireless AP without switching the channel.
  • FIG. 1 is a schematic diagram of a network architecture according to an embodiment of the present invention.
  • a plurality of wireless devices namely WLAN device 101 to WLAN device 106, are included in FIG.
  • the same designated channel (channel 165 (CH165)) is used to transmit the WUR frame.
  • the WUR radio frequency circuit of the terminal device 110 can hear the WUR frame sent by any wireless AP without switching the channel.
  • any WLAN device transmits a wake-up frame on the designated channel (channel 165) after the failed transmission of the wake-up frame on the working channel.
  • the WUR radio frequency circuit of the terminal device 110 can hear the WUR frame sent by any wireless AP as long as it switches to the designated channel.
  • FIG. 2 is a schematic diagram of a WLAN device waking up a terminal device according to an embodiment of the present invention.
  • FIG. 2 illustrates the flow of the embodiment of the present invention by taking the WLAN device 210 as the wake-up terminal device 220 as an example.
  • the WLAN device 210 includes a processor 212 and a transceiver 214.
  • Processor 212 may include a central processing unit (CPU), a network processor (NP), a radio frequency circuit, an application specific integrated circuit (ASIC), a programmable logic device (PLD), or any combination thereof.
  • the PLD may be a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA), a General Array Logic (GAL), or any combination thereof.
  • Radio frequency circuits also known as RF modules, are electronic devices that transmit and/or receive wireless signals between devices.
  • the circuits in the processor can be independent or integrated into one or more chips.
  • Transceiver 214 can be an antenna.
  • the antenna may include an array antenna, a multi-band antenna, a microstrip antenna, a directional antenna, or any other type of antenna.
  • the processor 212 transmits and receives wireless signals using the transceiver 214.
  • the WLAN device 210 further includes a memory.
  • the memory can be a standalone device or integrated into the processor 212.
  • the memory can include volatile memory, such as random access memory (RAM).
  • RAM random access memory
  • the memory may also include non-volatile memory such as read only memory (ROM), flash memory, optical disk, magnetic tape, floppy disk, hard disk or solid state hard disk.
  • ROM read only memory
  • flash memory optical disk
  • magnetic tape magnetic tape
  • floppy disk hard disk or solid state hard disk.
  • the memory may also include any combination of the above types of memory. If the processor 212 requires program code, the memory can store the program code and transmit the program code to the processor 212 to cause the processor 212 to implement the embodiments of the present invention in accordance with the instructions of the program code.
  • the terminal device 220 includes a primary radio frequency circuit 222 and a WUR radio frequency circuit 224.
  • the number of primary RF circuits 222 can be one or more.
  • the number of WUR RF circuits 224 can be one or more.
  • the operating frequency band of the primary RF circuit 222 is the same as the operating frequency band of the WUR RF circuit 224.
  • the terminal device 220 may include a plurality of WUR radio frequency circuits 224 corresponding to the working frequency bands.
  • two or more primary RF circuits 222 having different operating frequency bands can be woken up by a WUR RF circuit 224.
  • the primary RF circuit 222 and the WUR RF circuit 224 can share an antenna.
  • the primary RF circuit 222 and the WUR RF circuit 224 can also use respective antennas.
  • the main radio frequency circuit 222 is a radio frequency circuit that the terminal device 220 transmits and receives WLAN data.
  • the working channel of the primary radio frequency circuit 222 may be referred to as a primary connected radio (English: primary connectivity radio) channel.
  • the WUR radio frequency circuit 224 is a radio frequency circuit in which the terminal device 220 receives the WUR frame.
  • the WUR RF circuit 224 has only a receiver and no transmitter, so it only has the ability to receive wireless signals and cannot transmit wireless signals.
  • the working channel of the WUR radio frequency circuit 224 may be referred to as a WUR channel.
  • the WUR radio frequency circuit 224 uses the designated channel as the WUR channel.
  • the WUR channel includes a primary WUR channel and a backup WUR channel.
  • the primary WUR channel is the working channel of the primary radio frequency circuit 222, and the backup WUR channel is the designated channel. If the WLAN device 210 fails to transmit the wake-up frame on the primary WUR channel, it switches to the backup WUR channel to transmit the wake-up frame. If the terminal device 220 does not hear the WUR beacon frame for a long time on the primary WUR channel, it switches to the backup WUR channel to listen to the wireless medium.
  • the designated channel is the same channel used by multiple APs
  • the terminal device 220 may further include a processor.
  • the processor can include a CPU, NP, ASIC, PLD, or any combination thereof.
  • the terminal device 220 may further include a memory.
  • the memory can include volatile memory, such as random access memory (RAM).
  • RAM random access memory
  • the memory may also include non-volatile memory such as read only memory (ROM), flash memory, optical disk, magnetic tape, floppy disk, hard disk or solid state hard disk.
  • ROM read only memory
  • flash memory optical disk
  • magnetic tape magnetic tape
  • floppy disk hard disk or solid state hard disk.
  • the memory may also include any combination of the above types of memory.
  • the primary RF circuit 222, the WUR RF circuit 224, the processor (if present) and the memory (if present) can be separate chips or integrated into one or more chips.
  • the process of WLAN device 210 waking up terminal device 220 is as follows:
  • the WLAN device 210 sends the information of the designated channel on its working channel. After receiving the information of the designated channel, the primary radio frequency circuit of the terminal device 220 sets the designated channel of the WUR radio frequency circuit according to the information.
  • WLAN device 210 is WLAN device 103 in FIG. 1, and terminal device 220 is terminal device 110 in FIG.
  • the working channel of WLAN device 210 is channel 44 and the designated channel is channel 165.
  • the designated channel of WLAN device 210 can be fixed.
  • the designated channel can be specified by standards or regulations, or can be specified by the equipment vendor.
  • the designated channel of WLAN device 210 can also be statically configured.
  • a given channel can be manually configured to a specified value.
  • the designated channel of WLAN device 210 may also be dynamically negotiated, such as multiple WLAN devices 210 within an area negotiating a designated channel they share.
  • step 231 may be omitted. Therefore, if the designated channel is fixed or statically configured, step 231 is optional. For example, if the specified channel specified by the standard or regulation is solidified in the terminal device 220, or both the WLAN device 210 and the terminal device 220 are manually configured with the designated channel, step 231 may be omitted.
  • a channel that does not have to be dynamic frequency selection may be selected as the designated channel.
  • DFS dynamic frequency selection
  • one of channel 149, channel 153, channel 157, channel 161, channel 165 can be used as the designated channel.
  • the WLAN device 210 can preferentially select a channel that does not have to be DFS as the designated channel.
  • the WLAN device 210 can be configured to select the priority of each channel as the designated channel, wherein the channel that does not have to do DFS has a higher priority than the other channels.
  • the designated channel of the WLAN device 210 can be manually configured as an indoor (indoor) channel. If the WLAN is to be used outdoors, the WLAN device 210 selects a valid WLAN channel as the designated channel after doing DFS.
  • the WLAN device 210 transmits information of the designated channel on the working channel.
  • the information of the designated channel can be carried by the WUR channel element.
  • the WUR channel element is a newly defined information element.
  • the value of the element identifier (English: Element ID) field of the WUR channel element is, for example, one of 143-173 or 175-220.
  • the information field of the WUR channel element may be an eight-bit (English: octet), including the channel number (English: channel number).
  • the value of the number of channels of the WUR channel element is 165.
  • the WUR channel element may be in a beacon frame, a probe response frame (English: action) frame (for example, a spectrum (English: spectrum management) management action frame or a WUR action frame). One or more frames are carried.
  • the designated channel may be the same as or different from the working channel of the WLAN device 210.
  • the designated channel is channel 165
  • the working channels of the plurality of WLAN devices are channel 149, channel 153, channel 157, channel 161 and channel 165, respectively, and the working channel of one of the WLAN devices is the same as the designated channel.
  • the working channel available to the WLAN device and the primary radio circuit may be set to a WLAN channel outside the designated channel.
  • the designated channel is channel 165
  • the working channel available to the WLAN device and the primary radio frequency circuit can only be a valid working channel outside of channel 165.
  • the WLAN device 210 switches to the designated channel when transmitting the WUR frame, and transmits the WUR frame on the designated channel. After transmitting the WUR frame, the WLAN device 210 returns to its working channel.
  • the WLAN device 210 transmits a WUR beacon frame on the designated channel.
  • the WLAN device 210 periodically transmits WUR beacon frames on a designated channel (e.g., channel 165).
  • the WUR beacon frame and the beacon frame transmitted by the WLAN device 210 on the working channel (e.g., channel 44) are different, and the transmission of the WUR beacon frame is independent of the transmission of the beacon frame on the working channel.
  • the beacon interval of a WUR beacon frame can be much larger than the beacon interval of a beacon frame.
  • the beacon interval of the WUR beacon frame can be carried by the WUR mode element.
  • the WUR mode element may be carried by one or more frames in a beacon frame, a sounding response frame, or an action frame (eg, a WUR action frame) on the working channel.
  • the terminal device 220 receives the WUR beacon frame.
  • the terminal device 220 receiving the WUR beacon frame knows the existence of the WLAN device 210 that transmitted the WUR beacon frame.
  • the WUR beacon frame may include an indication of the working channel of the WLAN device 210.
  • the above step 232 is optional, and the WLAN device 210 may not transmit the WUR beacon frame on the designated channel.
  • the WLAN device 210 can transmit the WUR beacon frame only on the working channel without transmitting the WUR beacon frame on the designated channel.
  • the WUR radio frequency circuit 224 of the terminal device 220 is turned on.
  • the terminal device 220 may turn off the WUR radio frequency circuit 224 to further save power.
  • the WLAN device 210 may change the designated channel. For example, if the designated channel of WLAN device 210 is dynamically negotiated, WLAN device 210 may change the designated channel. Alternatively, if the designated channel of WLAN device 210 is configured, the new configuration may change the designated channel. In order for the terminal device 220 to learn of the change of the designated channel, the WLAN device 210 is to notify the terminal device 220 of the new designated channel. For example, WLAN device 210 indicates a new designated channel with a WUR beacon frame before changing the designated channel. The WUR radio frequency circuit 224 receives the WUR beacon frame, and if the WUR beacon frame indicates a new designated channel, the WUR radio frequency circuit 224 operates on the new designated channel.
  • the WLAN device 210 transmits a designated channel change indication on the designated channel to indicate the new designated channel.
  • the WUR radio frequency circuit 224 operating on the designated channel receives the designated channel change indication, according to which the WUR radio frequency circuit 224 operates on the new designated channel.
  • the designated channel change indication can be a new type of WUR frame.
  • the WLAN device 210 transmits a wake-up frame on the designated channel.
  • the WLAN device 210 transmits a wake-up frame on the designated channel.
  • the wake-up frame in the embodiment of the present invention is a WUR frame, which may also be referred to as a WUR wake-up frame.
  • the wake-up frame includes an identity of the terminal device to be woken up.
  • the WUR radio frequency circuit 224 of the terminal device 220 receives the wake-up frame. Based on the identity of the terminal device to be woken up, it can be determined whether the terminal device 220 is a terminal device to be woken up.
  • the identifier of the terminal device may be an address of the terminal device, such as a medium access control (MAC) address, or other type identifier that can identify the terminal device, such as an association identifier (AID) of the terminal device 220 and the terminal.
  • the BSS color is a simplified identification of the individual BSSs by wireless APs in the area.
  • the identifier of the terminal device may be an identifier of a single terminal device, or may be a group identifier or a broadcast identifier.
  • the group identifier indicates that all terminal devices in the corresponding group are terminal devices to be woken up.
  • the broadcast identifier indicates that any terminal device is a terminal device to be woken up.
  • the WLAN device 210 If the WLAN device 210 is to send a WLAN frame (for example, an individually addressed frame) to a terminal device, the WLAN device 210 sends the wake-up frame of the identity of the terminal device to be awake as the identity of a single terminal device to wake up one. Terminal Equipment.
  • a WLAN frame for example, an individually addressed frame
  • the WLAN frame is a group address frame.
  • the WLAN device 210 sends the wake-up frame of the terminal device to be awake as the group identifier or the broadcast identifier to wake up the plurality of terminal devices.
  • the WLAN device 210 transmits the set of address frames on the working channel after transmitting a preparation period after the wake-up frame identified as a group identifier or a broadcast identifier.
  • the WLAN device 210 can modulate the payload of the WUR wake-up frame using on-off keying (OOK).
  • OOK on-off keying
  • the WUR RF circuit 224 demodulates the payload of the WUR wake-up frame with OOK.
  • the WUR wake-up frame may not occupy the entire bandwidth of the designated channel, but only one or more of the orthogonal frequency division multiplexing (OFDM) subcarriers.
  • OFDM orthogonal frequency division multiplexing
  • the WUR radio frequency circuit 224 wakes up the main radio frequency circuit 222. For example, if the identity of the terminal device to be woken up is the identity of a single terminal device, and the identity of the single terminal device is the identity of the terminal device 220, the WUR radio frequency circuit 224 wakes up the primary radio frequency circuit 222. If the identifier of the terminal device to be awake is a group identifier, and the terminal device 220 is in the group identified by the group identifier, the WUR radio frequency circuit 224 wakes up the main radio frequency circuit 222. If the identifier of the terminal device to be woken up is a broadcast identifier, the WUR radio frequency circuit 224 wakes up the main radio frequency circuit 222.
  • the WUR RF circuit 224 can directly wake up the primary RF circuit 222.
  • the WUR radio frequency circuit 224 can also notify the processor that the main RF circuit 222 is woken up by the processor.
  • the primary radio frequency circuit operates on a working channel available to the primary radio frequency circuit after being woken up.
  • an indication of the working channel of the WLAN device 210 may be included in the wake-up frame. According to the indication, the primary RF circuit 222 operates on the active channel after being woken up.
  • the primary radio frequency circuit 222 transmits a response to the wake-up frame on the working channel.
  • the WLAN device 210 sends the wake-up frame of the terminal device to be awake as a separate identification of the terminal device 220 to wake up the terminal device 220 individually, the WLAN device 210 determines whether the terminal device 220 has been woken up. Since the WUR radio frequency circuit 224 is unable to transmit a wireless signal, the WUR radio frequency circuit 224 cannot reply an acknowledgment (ACK) frame on the designated channel. Thus, the primary radio frequency circuit 222 of the terminal device 220 transmits a response to the wake-up frame on the working channel after being woken up.
  • ACK acknowledgment
  • the response may be an ACK frame, which may be a probe request (English: probe request) frame, or a data frame (for example, an empty data frame), or any other type of frame, as long as the WLAN device 210 is informed that the terminal device 220 has been Wake up. If the WLAN device 210 receives a response to the wake-up frame on the working channel, the WLAN device 210 knows that the terminal device 220 has been successfully woken up. If the WLAN device 210 does not receive a response to the wake-up frame on the working channel, the WLAN device 210 fails to wake up the terminal device 220.
  • ACK frame which may be a probe request (English: probe request) frame, or a data frame (for example, an empty data frame), or any other type of frame, as long as the WLAN device 210 is informed that the terminal device 220 has been Wake up. If the WLAN device 210 receives a response to the wake-up frame on the working channel, the WLAN device 210 knows that the terminal device 220 has been successfully woken up. If the WLAN device
  • the WLAN device 210 if the WLAN device 210 does not receive a response to the wake-up frame on the working channel, the WLAN device 210 notifies other WLAN devices. Other WLAN devices and WLAN device 210 transmit new wake-up frames on the designated channel.
  • the new wake-up frame includes the identity of the terminal device 220.
  • the new wake-up frame sent by each WLAN device includes an indication of the working channel of the corresponding WLAN device.
  • the WLAN device 210 transmits a new wake-up frame on the designated channel.
  • This new wake-up frame can be the same as the last sent wake-up frame.
  • This new wake-up frame can also be different from the last sent wake-up frame. For example, during the WLAN device 210 waiting for a response to the last transmitted wake-up frame, the working channel of the WLAN device 210 changes, and the indication of the working channel in the new wake-up frame also changes accordingly.
  • the WLAN device 210 if the WLAN device 210 fails to wake up the terminal device 220 for the first time, the WLAN device 210 first attempts to wake up the terminal device 220 by itself. If one or more attempts fail again, the WLAN device 210 notifies other WLAN devices to send the wake-up frame.
  • step 234 may be omitted.
  • the WLAN device 210 transmits a WLAN frame on the working channel.
  • the WLAN device 210 wakes up the terminal device 220 individually, the WLAN device 210 transmits a WLAN frame to the terminal device 220 on the working channel after determining that the terminal device 220 has been woken up. If the WLAN device 210 transmits a wake-up frame identified as a group identity or a broadcast identity to wake up multiple terminal devices, the WLAN device 210 does not need to confirm whether each WLAN device 210 has been woken up. The WLAN device 210 transmits a WLAN frame, such as a group address frame, on the working channel after the preparation period after transmitting the wake-up frame.
  • a WLAN frame such as a group address frame
  • FIG. 3 is an example of a terminal device moving in coverage of two WLAN devices according to an embodiment of the present invention.
  • the terminal device 330 enters a sleep state after being associated with the WLAN device 310.
  • the terminal device 330 in the sleep state is awake by the WLAN device 320 after moving to the coverage of the WLAN device 320.
  • WLAN device 310 is WLAN device 103 in FIG. 1
  • WLAN device 320 is WLAN device 104 in FIG. 1
  • terminal device 330 is terminal device 110 in FIG.
  • the operation process is as follows:
  • the WLAN device 310 sends the information of the designated channel on its working channel. After receiving the information of the designated channel, the primary radio frequency circuit of the terminal device 330 sets the WUR channel of the WUR radio frequency circuit as the designated channel according to the information.
  • the working channel of WLAN device 310 is channel 44 and the designated channel is channel 165.
  • the WLAN device 310 transmits the information of the channel 165 on the channel 44.
  • the primary radio frequency circuit of the terminal device 330 receives the information of the channel 165 and sets the designated channel of the WUR radio frequency circuit to the channel 165.
  • the terminal device 330 then enters a sleep state.
  • the WLAN device 310 transmits a WUR beacon frame on the designated channel, the WUR beacon frame indicating a new designated channel.
  • WLAN device 310 periodically transmits a WUR beacon frame on channel 165. If the WLAN device 310 determines that the new designated channel is the channel 161, the WLAN device 310 indicates that the channel 161 is the new designated channel in the WUR beacon frame transmitted on the channel 165.
  • the WUR radio frequency circuit of the terminal device 330 receives the WUR beacon frame and sets a new designated channel.
  • the WLAN device 310 transmits a WUR beacon frame on the new designated channel.
  • the WLAN device 310 periodically transmits a WUR beacon frame on the channel 161.
  • the terminal device 330 in the sleep state can receive the WUR beacon frame when it is within the coverage of the WLAN device 310. If the terminal device 330 in the sleep state leaves the coverage of the WLAN device 310, the WUR beacon frame cannot be received.
  • the WLAN device 320 transmits a WUR beacon frame on the new designated channel.
  • the designated channels of the WLAN device 310 and the WLAN device 320 are the same.
  • the designated channel of the WLAN device 320 also becomes the channel 161.
  • WLAN device 320 periodically transmits a WUR beacon frame on channel 161.
  • the terminal device 330 in the sleep state can receive the WUR beacon frame after entering the coverage of the WLAN device 320.
  • the WLAN device 320 transmits a wake-up frame on the new designated channel.
  • the WLAN device 320 When the WLAN device 320 is to wake up the terminal device 330, the WLAN device 320 transmits a wake-up frame including the identity of the terminal device 330 on the channel 161.
  • the wake-up frame also includes an indication of the working channel (channel 48) of the WLAN device 320.
  • the WUR radio frequency circuit of the terminal device 330 receives the wake-up frame.
  • the primary radio frequency circuit of the terminal device 330 transmits a response to the wake-up frame on the working channel.
  • the WUR radio frequency circuit of the terminal device 330 wakes up the main radio frequency circuit after receiving the wake-up frame. Since the WUR RF circuit cannot transmit wireless signals, the WUR RF circuit cannot reply to the acknowledgement frame on channel 161. Thus, the primary radio frequency circuitry of terminal device 330 transmits a response to the wake-up frame on channel 48 after being woken up.
  • WLAN device 320 If WLAN device 320 does not receive a response to the wake-up frame on channel 48, WLAN device 320 transmits a new wake-up frame on channel 161.
  • This new wake-up frame can be the same as the last sent wake-up frame. This new wake-up frame can also be different from the last sent wake-up frame.
  • the WLAN device 320 transmits a WLAN frame to the terminal device 330 on the channel 48 after determining that the terminal device 330 has been woken up.
  • FIG. 4 is another example of a terminal device moving in coverage of two WLAN devices according to an embodiment of the present invention.
  • the terminal device 430 is in a sleep state after being associated with the WLAN device 410.
  • the terminal device 430 in the sleep state is awake by the WLAN device 420 after moving to the coverage of the WLAN device 420.
  • WLAN device 410 is WLAN device 103 in FIG. 1
  • WLAN device 420 is WLAN device 104 in FIG. 1
  • terminal device 430 is terminal device 110 in FIG.
  • the operation process is as follows:
  • the WLAN device 410 sends the information of the designated channel on its working channel. After receiving the information of the designated channel, the primary radio frequency circuit of the terminal device 430 sets the designated channel of the WUR radio frequency circuit according to the information.
  • the working channel of WLAN device 410 is channel 44 and the designated channel is channel 165.
  • the WLAN device 410 transmits the information of the channel 165 on the channel 44.
  • the primary radio frequency circuit of the terminal device 430 receives the information of the channel 165 and sets the backup WUR channel of the WUR radio frequency circuit to the designated channel (channel 165).
  • the terminal device 330 then enters a sleep state.
  • the WLAN device 410 transmits a WUR beacon frame on the working channel.
  • WLAN device 410 periodically transmits WUR beacon frames on channel 44. If WLAN device 410 determines a new designated channel, WLAN device 410 indicates a new designated channel in the WUR beacon frame transmitted on channel 44. The WUR radio frequency circuit of the terminal device 430 receives the WUR beacon frame and sets the backup WUR channel to a new designated channel.
  • the terminal device 430 in the sleep state leaves the coverage of the WLAN device 410, and cannot receive the WLAN device 410 to transmit the WUR beacon frame on the working channel.
  • the terminal device 430 in the sleep state is capable of receiving the WUR beacon frame while being within the coverage of the WLAN device 410. If the terminal device 430 in the sleep state leaves the coverage of the WLAN device 410, the WUR beacon frame on the channel 44 cannot be received.
  • the WLAN device 420 transmits a WUR beacon frame on the working channel.
  • WLAN device 420 is channel 48 on the working channel.
  • the terminal device 430 in the sleep state cannot know the working channel of the WLAN device in its coverage area.
  • the WUR radio frequency circuitry of terminal device 430 in the sleep state still operates on channel 44 and is therefore unable to receive WUR beacon frames on channel 48. After the beacon interval of one or more WUR beacon frames, the terminal device 430 still cannot hear the WUR beacon frame, and the WUR radio frequency circuit instead operates on the backup WUR channel, channel 165.
  • the WLAN device 410 sends a wake-up frame on the working channel.
  • the WLAN device 410 When the WLAN device 410 is to wake up the terminal device 430, the WLAN device 410 transmits a wake-up frame including the identity of the terminal device 330 on the channel 44. Since the terminal device 430 leaves the coverage of the WLAN device 410 and the WUR radio frequency circuit of the terminal device 430 operates on the backup WUR channel, channel 165, the terminal device 430 cannot receive the wake-up frame of the WLAN device 410.
  • the WLAN device 410 notifies each WLAN device to send a wake-up frame on the designated channel.
  • the WLAN device 410 Since the terminal device 430 is not awake and does not respond to the wake-up frame, the WLAN device 410 does not receive a response to the wake-up frame on the channel 44. Alternatively, WLAN device 410 can transmit a new wake-up frame on channel 44. If the first transmission of the wake-up frame fails or the re-send of the wake-up frame still fails, the WLAN device 410 notifies each of the WLAN devices including the WLAN device 420 to transmit a wake-up frame including the identity of the terminal device 430 on the designated channel (channel 165). And each wake-up frame includes an indication of a working channel for the corresponding WLAN device.
  • the WUR radio frequency circuit of the terminal device 430 operates on the backup WUR channel, channel 165, so the terminal device 430 receives the wake-up frame of the WLAN device 420.
  • the wake-up frame of WLAN device 420 includes an indication of the working channel (channel 48) of WLAN device 420.
  • the primary radio frequency circuit of the terminal device 430 transmits a response to the wake-up frame on the working channel (channel 48) indicated by the wake-up frame.
  • the WLAN device 420 transmits a WLAN frame to the terminal device 430 on the channel 48 after determining that the terminal device 430 has been woken up.
  • FIG. 5 is a schematic diagram of an apparatus for waking up a terminal device according to an embodiment of the present invention.
  • the means for waking up the terminal device is implemented by any of the WLAN devices of FIG.
  • the device for waking up the terminal device includes a wake-up module 502 and a sending module 504. And a wake-up module, configured to send a wake-up frame on the designated channel, where the wake-up frame includes an identifier of the terminal device to be woken up.
  • a sending module configured to send a WLAN frame on a working channel.
  • the above embodiments it may be implemented in whole or in part by software, hardware, or a combination thereof.
  • software When implemented in software, or in a combination of software and hardware, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a storage medium or transferred from one storage medium to another.
  • the computer instructions can be routed from one website site, computer, server or data center to another website site via wire (eg, coaxial cable, twisted pair or fiber optic) or wireless (eg, infrared, wireless, or microwave). Transfer from a computer, server, or data center.
  • the storage medium may be any available media that can be accessed by a computer or a data storage device that includes one or more media integrated servers, data centers, and the like.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, an optical disk), or a semiconductor medium (such as a solid state disk (SSD)) or the like.

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Abstract

公开了一种线接入点、终端设备及无线接入点唤醒终端设备的方法。该终端设备包括主射频电路和唤醒无线(WUR)射频电路。WUR射频电路仅接收无线信号，并且工作在指定信道上。如果在所述指定信道上接收到唤醒帧且所述终端设备为待唤醒的终端设备，WUR射频电路唤醒主射频电路。其中，唤醒帧包括待唤醒的终端设备的标识。所述主射频电路在被唤醒后在主射频电路的工作信道上工作。该终端设备的WUR射频电路不需要频繁切换信道。

Description

无线接入点、终端设备及无线接入点唤醒终端设备的方法
本申请要求于2017年4月26日提交中国专利局、申请号为201710282884.8、发明名称为“无线接入点、终端设备及无线接入点唤醒终端设备的方法”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，尤其涉及一种线接入点、终端设备及无线接入点唤醒终端设备的方法。
背景技术
无线局域网(英文：wireless local area network，WLAN)中的终端设备可以进入睡眠模式(英文：sleep mode)。然而即使在睡眠模式中的终端设备也要时常从瞌睡状态(英文：doze state)进入苏醒状态(英文：awake state)以接收数据。
发明内容
本申请提供一种终端设备及其唤醒方法和无线接入点，以降低终端设备的功耗。
第一方面，提供了一种终端设备，包括主射频电路和唤醒无线(英文：wake-up radio，WUR)射频电路。所述WUR射频电路，用于仅接收无线信号，并且工作在指定信道上。如果在所述指定信道上接收到唤醒帧且所述终端设备为待唤醒的终端设备，所述WUR射频电路，还用于唤醒所述主射频电路。其中，所述唤醒帧包括待唤醒的终端设备的标识。所述主射频电路用于在被唤醒后在所述主射频电路的工作信道上工作。
WUR射频电路为终端设备中主射频电路之外的射频电路。该WUR射频电路仅有接收无线信号的能力，而不能发送无线信号。该WUR射频电路只用来接收相关于唤醒操作的帧(WUR帧)，而忽视其他帧(例如WLAN数据祯)。因此，WUR射频电路的功耗和复杂度都很低。该WUR射频电路工作时的功耗可以小于100微瓦(μW)。为了及时唤醒终端设备，WUR射频电路工作在指定信道。WUR射频电路不需要频繁切换信道。由于其他WLAN设备知道该指定信道，因此能够在该指定信道上发送唤醒帧。WUR射频电路工作在指定信道时可以接收到该唤醒帧，从而可以唤醒主射频电路。
结合第一方面，在第一方面的第一种实现中，所述主射频电路还用于在所述主射频电路的工作信道上接收所述WUR射频电路的指定信道的信息。如果指定信道是动态协商的，或者终端设备不知道指定信道，WLAN设备可以将指定信道告知终端设备。
结合第一方面或第一方面的第一种实现，在第一方面的第二种实现中，所述主射频电路的工作频段和所述WUR射频电路的工作频段相同。
结合第一方面、第一方面的第一种实现或第一方面的第二种实现，在第一方面的第三种实现中，所述主射频电路可用的工作信道为所述指定信道之外的WLAN信道。工作信道和指定信道不同可以减少信道间的干扰。
结合第一方面或第一方面的第一种实现至第三种实现中的任意一个，在第一方面的第四种实现中，所述唤醒帧还包括对所述工作信道的指示，所述主射频电路用于在被唤 醒后在所述唤醒帧指示的工作信道上工作。唤醒帧指示发送该唤醒帧的WLAN设备的工作信道，可以减少主射频电路被唤醒后扫描信道的负担。
结合第一方面或第一方面的第一种实现至第四种实现中的任意一个，在第一方面的第五种实现中，所述待唤醒的终端设备的标识为所述终端设备的单独的标识，所述主射频电路还用于在被后在所述唤醒帧指示的工作信道上发送对所述唤醒帧的响应。终端设备响应唤醒帧以告知WLAN设备自己已被唤醒。由于WUR射频电路不能发送无线信号，终端设备的主射频电路在被唤醒后在工作信道上发送对该唤醒帧的响应。
结合第一方面或第一方面的第一种实现至第五种实现中的任意一个，在第一方面的第六种实现中，所述WUR射频电路还用于接收WUR信标帧，如果所述WUR信标帧指示了新的指定信道，则工作在所述新的指定信道上。如果WLAN设备的指定信道是动态的，WLAN设备可能改变指定信道。为了使终端设备得知指定信道的改变，WLAN设备通知终端设备新的指定信道。
第二方面，提供了一种终端设备苏醒方法，包括上述第一方面中终端设备执行的步骤。
第三方面，提供了一种唤醒终端设备的方法，包括：WLAN设备在指定信道上发送唤醒帧，所述唤醒帧包括待唤醒的终端设备的标识。所述WLAN设备在工作信道上发送WLAN帧。
结合第三方面，在第三方面的第一种实现中，所述方法还包括：所述WLAN设备在所述工作信道上发送所述指定信道的信息。
结合第三方面或第三方面的第一种实现，在第三方面的第二种实现中，所述WLAN设备可用的工作信道为所述指定信道之外的WLAN信道。
结合第三方面、第三方面的第一种实现或第三方面的第二种实现，在第三方面的第三种实现中，所述唤醒帧还包括对所述工作信道的指示。
结合第三方面或第三方面的第一种实现至第三种实现中的任意一个，在第三方面的第四种实现中，所述待唤醒的终端设备的标识为单独一个终端设备的标识，所述方法还包括：如果所述WLAN设备在所述工作信道上没有接收到对所述唤醒帧的响应，所述WLAN设备在所述指定信道上发送新的唤醒帧。
结合第三方面或第三方面的第一种实现至第四种实现中的任意一个，在第三方面的第五种实现中，所述待唤醒的终端设备的标识为组标识或广播标识，所述WLAN帧为组地址帧，所述WLAN设备在发送所述唤醒帧后的准备时期后在工作信道上发送所述WLAN帧。如果WLAN设备发送标识为组标识或广播标识的唤醒帧以唤醒多个终端设备，WLAN设备不需要确认各个WLAN设备是否已被唤醒。
结合第三方面或第三方面的第一种实现至第五种实现中的任意一个，在第三方面的第六种实现中，所述方法还包括：所述WLAN设备在所述指定信道上周期性地发送唤醒无线(WUR)信标帧，所述WUR信标帧的发送独立于所述工作信道上的信标帧的发送。
结合第三方面的第六种实现，在第三方面的第七种实现中，所述WUR信标帧包括对所述工作信道的指示。
结合第三方面或第三方面的第一种实现至第七种实现中的任意一个，在第三方面的第八种实现中，所述方法还包括：所述WLAN设备在改变所述指定信道前，用WUR信标 帧指示新的指定信道。
结合第三方面或第三方面的第一种实现至第八种实现中的任意一个，在第三方面的第九种实现中，所述指定信道所在的WLAN频段和所述工作信道所在的WLAN频段相同。
第四方面，提供了一种唤醒终端设备的装置，该装置具有实现上述第三方面的方法中WLAN设备行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
第五方面，提供了一种WLAN设备，包括处理器和收发器。所述处理器用于用所述收发器收发无线信号并执行上述第三方面的方法中的步骤。
第六方面，本发明实施例提供了一种计算机存储介质，用于储存为上述WLAN设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
第七方面，本发明实施例提供了一种计算机存储介质，用于储存为上述终端设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
附图说明
图1为本发明实施例中一种网络架构的示意图；
图2为本发明实施例中WLAN设备唤醒终端设备的示意图；
图3为本发明实施例中终端设备在两个WLAN设备覆盖范围内移动时的一个例子；
图4为本发明实施例中终端设备在两个WLAN设备覆盖范围内移动时的另一个例子；
图5为本发明实施例中唤醒终端设备的装置的示意图。
具体实施方式
以下结合图1至图5说明本发明实施例。
物联网场景中，很多设备要用电池供电。因此延长设备的使用时限(电池寿命)很重要。WLAN设备的普及率高，如果能利用WLAN设备实现物联网场景要求的功能，可以降低物联网普及的门槛。
WLAN设备可以进入睡眠模式。然而即使在睡眠模式中的终端设备也要时常从瞌睡状态进入苏醒状态以接收另一WLAN设备(例如无线接入点(英文：access point，AP)或使用其他类型WLAN设备)的数据。设备停留在瞌睡状态的时间越长，消耗的能量越低。而长时间处于瞌睡状态又降低了数据传输的及时性。
为了尽可能降低WLAN设备的功耗，并满足对数据传输的及时性的要求，本发明实施例在WLAN设备中设置主射频(英文：radio frequency，RF)电路之外的专门的唤醒无线(英文：wake-up radio，WUR)射频电路。该设置了WUR射频电路的WLAN设备被称为WUR终端设备或终端设备。该WUR射频电路仅有接收无线信号的能力，而不能发送无线信号。该WUR射频电路只用来接收相关于唤醒操作的帧(可以称为WUR帧，例如WUR信标帧或WUR唤醒帧)，忽视其他帧(例如数据祯)。因此，WUR射频电路的功耗和复杂度低。该WUR射频电路工作时的功耗可以小于100微瓦(μW)。主射频电路和WUR射频电路可以是独立的，也可以集成在一个芯片内。
当没有数据传输时，终端设备处于睡眠状态。终端设备处于睡眠状态时，主射频电路关闭以节能。终端设备处于睡眠状态时，WUR射频电路听无线介质，以便及时接收唤 醒帧。可选的，WUR射频电路可以暂停工作以进一步节能。例如，WUR射频电路可以周期性地暂停工作。进一步的，终端设备处于睡眠状态时，整个设备内除WUR射频电路外的任意器件都可以处于断电状态。如果终端设备包括易失性存储器，睡眠状态时该易失性存储器可以不在断电状态。或者，终端设备可以在进入睡眠状态前将易失性存储器中的内容复制到非易失性存储器，再在进入睡眠状态时关闭易失性存储器。
当WLAN设备有数据需要向终端设备发送，或要查询终端设备的数据时，先发送唤醒帧。待唤醒的终端设备的WUR射频电路接收到唤醒帧后，唤醒终端设备的主射频电路。此时终端设备处于苏醒状态。在发送唤醒帧后，WLAN设备再发送WLAN帧。该WLAN帧可以为数据帧或管理帧。数据帧可以包括WLAN设备向终端设备发送的数据或查询终端设备的数据的指示。
以WLAN设备为无线AP为例，为了降低无线AP之间的干扰，相邻的无线AP一般会被设置为工作在不同的工作信道(英文：operating channel)上。如果无线AP用各自的工作信道发送WUR帧，则相邻的无线AP发送WUR帧的信道不同。
当终端设备从原无线AP移动到相邻的无线AP的覆盖范围后，由于不知道新无线AP的工作信道，只能切换WUR射频电路的工作信道以尝试听新无线AP发送的WUR帧。WLAN频段包括900兆赫兹(MHz)频段，2.4吉赫兹(GHz)频段，3.65GHz频段，4.9GHz频段，5GHz频段，5.9GHz频段，60GHz频段等。不同WLAN频段包括的WLAN信道的数量由各国/地区法规规定。例如，在美国，5GHz频段中带宽为20MHz的信道有25个。因为终端设备不知道新无线AP的工作信道，其WUR射频电路的工作信道要频繁的切换以在这25个信道中找到新无线AP的工作信道。频繁的信道切换增加了WUR射频电路的功耗。
如果一个区域内的多个无线AP使用相同的信道发送WUR帧，终端设备在该区域内任意移动时，其WUR射频电路不需要切换信道就可以听到新无线AP发送的WUR帧。
图1为本发明实施例中一种网络架构的示意图。
图1中包括多个无线设备，即WLAN设备101至WLAN设备106。
本发明实施例中，尽管WLAN设备101至WLAN设备106的工作信道各不相同，但都使用同一个指定信道(信道165(CH165))发送WUR帧。终端设备110在WLAN设备101至WLAN设备106的覆盖区域内任意移动时，终端设备110的WUR射频电路不需要切换信道就可以听到任意无线AP发送的WUR帧。或者，任一WLAN设备在的工作信道发送唤醒帧失败后，在该指定信道(信道165)发送唤醒帧。终端设备110在离开原WLAN设备覆盖范围后，终端设备110的WUR射频电路只要切换到该指定信道就可以听到任意无线AP发送的WUR帧。
图2为本发明实施例中WLAN设备唤醒终端设备的示意图。
图2以WLAN设备210唤醒终端设备220为例，说明了本发明实施例的流程。
WLAN设备210包括处理器212和收发器214。处理器212可以包括中央处理器(CPU)，网络处理器(NP)，射频电路，专用集成电路(ASIC)，可编程逻辑器件(PLD)或其任意组合。上述PLD可以是复杂可编程逻辑器件(CPLD)，现场可编程门阵列(FPGA)，通用阵列逻辑(GAL)或其任意组合。射频电路也称为RF模块，是设备间发送和/或接收无线信号的电子器件。处理器中的各电路可以是独立的，也可以集成在一个或多个芯片 中。
收发器214可以为天线。该天线可以包括阵列天线，多频段天线，微带天线，定向天线或其他任意类型天线。处理器212用收发器214收发无线信号。
可选的，WLAN设备210还包括存储器。存储器可以是独立的器件也可以集成在处理器212中。存储器可以包括易失性存储器，例如随机存取存储器(RAM)。存储器也可以包括非易失性存储器，例如只读存储器(ROM)，快闪存储器，光盘，磁带，软盘，硬盘或固态硬盘。存储器还可以包括上述种类的存储器的任意组合。如果处理器212需要程序代码，存储器可以存储程序代码，并将该程序代码传输给处理器212，以使得处理器212根据程序代码的指示实现本发明实施例。
终端设备220包括主射频电路222和WUR射频电路224。主射频电路222的数量可以为一个或多个。WUR射频电路224数量可以为一个或多个。例如，主射频电路222的工作频段和WUR射频电路224的工作频段相同。如果终端设备220包括多个工作频段不同的主射频电路222，则终端设备220可以包括多个对应工作频段的WUR射频电路224。又例如，两个或更多工作频段不同的主射频电路222可以被一个WUR射频电路224唤醒。主射频电路222和WUR射频电路224可以共用天线。主射频电路222和WUR射频电路224也可以使用各自的天线。以下以5GHz频段为例说明本发明实施例，本发明实施例也可以应用到其他频段。
主射频电路222是终端设备220收发WLAN数据的射频电路。主射频电路222的工作信道可以被称为主连接无线(英文：primary connectivity radio)信道。
WUR射频电路224是终端设备220接收WUR帧的射频电路。WUR射频电路224只有接收器，没有发送器，因此仅有接收无线信号的能力，而不能发送无线信号。WUR射频电路224的工作信道可以被称为WUR信道。WUR射频电路224用指定信道作为WUR信道。或者，WUR信道包括主WUR信道和备份WUR信道。主WUR信道为主射频电路222的工作信道，备份WUR信道为指定信道。如果WLAN设备210在主WUR信道上发送唤醒帧失败则切换到备份WUR信道上发送唤醒帧。如果终端设备220在主WUR信道上长期没听到WUR信标帧则切换到备份WUR信道上听无线介质。指定信道是多个AP使用的发送WUR帧的相同的信道。
可选的，终端设备220还可以包括处理器。处理器可以包括CPU，NP，ASIC，PLD或其任意组合。可选的，终端设备220还可以包括存储器。存储器可以包括易失性存储器，例如随机存取存储器(RAM)。存储器也可以包括非易失性存储器，例如只读存储器(ROM)，快闪存储器，光盘，磁带，软盘，硬盘或固态硬盘。存储器还可以包括上述种类的存储器的任意组合。主射频电路222，WUR射频电路224，处理器(如果存在的话)和存储器(如果存在的话)可以是独立的芯片，也可以集成在一个或多个芯片中。
WLAN设备210唤醒终端设备220的流程如下：
231、WLAN设备210在其工作信道上发送指定信道的信息，终端设备220的主射频电路接收到指定信道的信息后，根据该信息设置WUR射频电路的指定信道。
例如，WLAN设备210为图1中的WLAN设备103，终端设备220为图1中的终端设备110。WLAN设备210的工作信道为信道44，指定信道为信道165。WLAN设备210的指 定信道可以为固定的。例如，指定信道可以由标准或法规指定，或者可以由设备商指定。WLAN设备210的指定信道也可以为静态配置的。例如，指定信道可以由人工配置为指定值。WLAN设备210的指定信道还可以是动态协商的，例如区域内的多个WLAN设备210协商它们共享的指定信道。
如果终端设备220知道指定信道是哪个，则步骤231可省略。因此，如果指定信道是固定的或静态配置的，步骤231是可选的。例如，终端设备220中固化了由标准或法规指定的指定信道，或者WLAN设备210和终端设备220都被人工配置了指定信道，则步骤231可省略。
如果指定信道是固定的或静态配置的，可以选择不必做动态频率选择(英文：dynamic frequency selection，DFS)的信道作为指定信道。例如，在美国，加拿大，俄罗斯，新加坡，中国，韩国，澳大利亚，巴西，台湾和新西兰，可以用信道149，信道153，信道157，信道161，信道165中的一个信道作为指定信道。
如果WLAN设备210的指定信道是动态协商的，WLAN设备210可以优先选择不必做DFS的信道作为指定信道。例如，WLAN设备210种可以被配置各个信道被选择为指定信道的优先级，其中不必做DFS的信道的优先级高于其它信道。
有些国家/地区的法规规定所有5GHz频段的信道都要做DFS，或者只能在室内使用。如果WLAN只用在室内，例如在室内物联网场景中，可以人工配置WLAN设备210的指定信道为室内(英文：indoor)信道。如果WLAN要在室外使用，则WLAN设备210做DFS后选择一个有效的WLAN信道作为指定信道。
如果WLAN设备210的指定信道是动态协商的，或者指定信道是固定的或静态配置的但终端设备220不知道指定信道，WLAN设备210要将指定信道告知终端设备220。WLAN设备210在工作信道上发送指定信道的信息。指定信道的信息可以由WUR信道元素携带。WUR信道元素是新定义的信息元素。WUR信道元素的元素标识(英文：Element ID)字段的值例如为143-173或175-220中的一个数。WUR信道元素的信息字段的长度可以为一个八位(英文：octet)，包括信道数(英文：channel number)。例如，指定信道为信道165，则WUR信道元素的信道数的值为165。WUR信道元素可以由信标(英文：beacon)帧，探测响应(英文：probe response)帧或动作(英文：action)帧(例如频谱(英文：spectrum management)管理动作帧或WUR动作帧)中的一个或多个帧携带。
指定信道可以和WLAN设备210的工作信道相同，也可以不同。例如，指定信道为信道165，多个WLAN设备的工作信道分别为信道149，信道153，信道157，信道161和信道165，则其中一个WLAN设备的工作信道和指定信道相同。
可选的，为减少工作信道和指定信道间的干扰，WLAN设备和主射频电路可用的工作信道可以被设置为指定信道之外的WLAN信道。例如，指定信道为信道165，则WLAN设备和主射频电路可用的工作信道只能为信道165之外的有效的工作信道。
如果指定信道和WLAN设备210的工作信道不同，WLAN设备210在发送WUR帧时切换到指定信道，在指定信道上发送WUR帧。发送WUR帧后，WLAN设备210回到其工作信道。
232、WLAN设备210在指定信道上发送WUR信标帧。
WLAN设备210在指定信道(例如信道165)上周期性地发送WUR信标帧。WUR信标帧和WLAN设备210在工作信道(例如信道44)上发送的信标帧不同，并且WUR信标帧的发送独立于所述工作信道上的信标帧的发送。例如，WUR信标帧的信标间隔(英文：beacon interval)可以远大于信标帧的信标间隔。WUR信标帧的信标间隔可以由WUR模式元素携带。WUR模式元素可以由工作信道上的信标帧，探测响应帧或动作帧(例如WUR动作帧)中的一个或多个帧携带。
如果WLAN设备210在指定信道上发送WUR信标帧，并且终端设备220的WUR射频电路224开启并工作在指定信道上，终端设备220接收WUR信标帧。接收到WUR信标帧的终端设备220得知发送该WUR信标帧的WLAN设备210的存在。可选的，WUR信标帧可以包括对WLAN设备210的工作信道的指示。
上述步骤232为可选项，WLAN设备210可以不在指定信道上发送WUR信标帧。例如如果主WUR信道为工作信道，备份WUR信道为指定信道，则WLAN设备210可以只在工作信道上发送WUR信标帧而不在指定信道上发送WUR信标帧。
在终端设备220处于睡眠状态时，终端设备220的WUR射频电路224开启。可选的，在终端设备220处于清醒状态时，终端设备220可以关闭WUR射频电路224以进一步节能。
WLAN设备210可能改变指定信道。例如，如果WLAN设备210的指定信道是动态协商的，WLAN设备210可能改变指定信道。或者，如果WLAN设备210的指定信道是配置的，新的配置可能改变指定信道。为了使终端设备220得知指定信道的改变，WLAN设备210要通知终端设备220新的指定信道。例如，WLAN设备210在改变指定信道前，用WUR信标帧指示新的指定信道。WUR射频电路224接收WUR信标帧，如果该WUR信标帧指示了新的指定信道，则WUR射频电路224工作在新的指定信道上。又例如，如果备份WUR信道为指定信道，WLAN设备210在指定信道发送指定信道改变指示以指示新的指定信道。工作在指定信道上的WUR射频电路224接收该指定信道改变指示，根据该指示，WUR射频电路224工作在新的指定信道上。指定信道改变指示可以是一种新类型的WUR帧。
233、WLAN设备210在指定信道上发送唤醒帧。
如果WLAN设备210要唤醒一个或多个终端设备，该WLAN设备210在指定信道上发送唤醒帧。本发明实施例中的唤醒帧是WUR帧，也可称为WUR唤醒帧。该唤醒帧包括待唤醒的终端设备的标识。终端设备220的WUR射频电路224接收到唤醒帧。根据待唤醒的终端设备的标识，可以确定终端设备220是否是待唤醒的终端设备。终端设备的标识可以是终端设备的地址，例如介质访问控制(MAC)地址，也可以是能够标识终端设备的其他类型标识，例如终端设备220的关联标识(英文：association ID，AID)以及该终端设备220所关联的基本服务集(英文：basic service set，BSS)的BSS色彩的组合。BSS色彩是区域内的无线AP对各个BSS的简化标识。终端设备的标识可以为单独一个终端设备的标识，也可以为组标识或广播标识。组标识指示对应的组内的所有终端设备为待唤醒的终端设备。广播标识指示任何终端设备都为待唤醒的终端设备。
如果WLAN设备210要向一个终端设备发送WLAN帧(例如单独地址(英文：individually addressed)帧)，则WLAN设备210发送待唤醒的终端设备的标识为单独 一个终端设备的标识的唤醒帧以唤醒一个终端设备。
如果WLAN设备210要向多个终端设备发送WLAN帧，则该WLAN帧为组地址帧。WLAN设备210发送待唤醒的终端设备的标识为组标识或广播标识的唤醒帧以唤醒多个终端设备。WLAN设备210在发送标识为组标识或广播标识的唤醒帧后的准备时期(英文：preparation period)后在工作信道上发送该组地址帧。
WLAN设备210可以使用开关键控(英文：on-off keying，OOK)对WUR唤醒帧的净荷做调制。相应的，WUR射频电路224用OOK对WUR唤醒帧的净荷做解调。WUR唤醒帧可以不占用指定信道的全部带宽，而只用其中一个或多个正交频分复用(OFDM)子载波。
如果WUR射频电路224在所述指定信道上接收到唤醒帧且终端设备220为待唤醒的终端设备，WUR射频电路224唤醒主射频电路222。例如，如果待唤醒的终端设备的标识为单独一个终端设备的标识，并且该单独一个终端设备的标识为终端设备220的标识，WUR射频电路224唤醒主射频电路222。如果所述待唤醒的终端设备的标识为组标识，并且终端设备220在该组标识所标识的组中，WUR射频电路224唤醒主射频电路222。如果所述待唤醒的终端设备的标识为广播标识，WUR射频电路224唤醒主射频电路222。
WUR射频电路224可以直接唤醒主射频电路222。WUR射频电路224也可以通知处理器，由处理器唤醒主射频电路222。所述主射频电路在被唤醒后在所述主射频电路可用的工作信道上工作。
可选的，唤醒帧中可以包括对WLAN设备210的所述工作信道的指示。根据该指示，主射频电路222在被唤醒后在该工作信道上工作。
234、主射频电路222在工作信道上发送对唤醒帧的响应。
如果WLAN设备210发送待唤醒的终端设备的标识为终端设备220的单独的标识的唤醒帧以单独唤醒终端设备220，WLAN设备210要确定终端设备220是否已被唤醒。由于WUR射频电路224不能发送无线信号，WUR射频电路224不能在指定信道上回复确认(ACK)帧。因此，终端设备220的主射频电路222在被唤醒后在工作信道上发送对该唤醒帧的响应。该响应可以是ACK帧，可以是探测请求(英文：probe request)帧，也可以是数据帧(例如空数据帧)，或者任何其他类型帧，只要让WLAN设备210得知该终端设备220已被唤醒即可。如果WLAN设备210在工作信道上接收到对所述唤醒帧的响应，则WLAN设备210得知终端设备220已经被成功唤醒。如果WLAN设备210在工作信道上没有接收到对所述唤醒帧的响应，说明WLAN设备210唤醒终端设备220失败。
可选的，如果WLAN设备210在工作信道上没有接收到对所述唤醒帧的响应，WLAN设备210通知其他WLAN设备。其他WLAN设备以及WLAN设备210在指定信道上发送新的唤醒帧。该新的唤醒帧包括终端设备220的标识。并且各个WLAN设备发送的新的唤醒帧包括对于对应的WLAN设备的工作信道的指示。
可选的，如果WLAN设备210在工作信道上没有接收到对所述唤醒帧的响应，WLAN设备210在指定信道上发送新的唤醒帧。该新的唤醒帧可以和上次发送的唤醒帧相同。该新的唤醒帧也可以和上次发送的唤醒帧不同。例如，在WLAN设备210等待对上次发送的唤醒帧的响应期间，WLAN设备210的工作信道改变了，则新的唤醒帧中对工作信道的指示也相应改变。
可选的，如果WLAN设备210首次唤醒终端设备220失败，WLAN设备210先自己重 新尝试唤醒终端设备220，如果一次或多次尝试再次失败，WLAN设备210再通知其他WLAN设备发送唤醒帧。
如果WLAN设备210发送待唤醒的终端设备的标识为组标识或广播标识，步骤234可以被省略。
235、WLAN设备210在工作信道上发送WLAN帧。
如果WLAN设备210单独唤醒终端设备220，WLAN设备210在确定终端设备220已被唤醒后在工作信道上向终端设备220发送WLAN帧。如果WLAN设备210发送标识为组标识或广播标识的唤醒帧以唤醒多个终端设备，WLAN设备210不需要确认各个WLAN设备210是否已被唤醒。WLAN设备210在发送唤醒帧后的准备时期后在工作信道上发送WLAN帧，例如组地址帧。
图3为本发明实施例中终端设备在两个WLAN设备覆盖范围内移动时的一个例子。图3中终端设备330关联到WLAN设备310后进入睡眠状态。在睡眠状态中的终端设备330移动到WLAN设备320的覆盖范围后被WLAN设备320唤醒。例如，WLAN设备310为图1中的WLAN设备103，WLAN设备320为图1中的WLAN设备104，终端设备330为图1中的终端设备110。操作流程如下：
341、WLAN设备310在其工作信道上发送指定信道的信息，终端设备330的主射频电路接收到指定信道的信息后，根据该信息设置WUR射频电路的WUR信道为指定信道。
WLAN设备310的工作信道为信道44，指定信道为信道165。WLAN设备310在信道44上发送信道165的信息，终端设备330的主射频电路接收到信道165的信息后设置WUR射频电路的指定信道为信道165。之后终端设备330进入睡眠状态。
342、WLAN设备310在指定信道上发送WUR信标帧，该WUR信标帧指示新的指定信道。
WLAN设备310在信道165上周期性地发送WUR信标帧。如果WLAN设备310确定了新的指定信道为信道161，WLAN设备310在信道165上发送的WUR信标帧中指示信道161为新的指定信道。终端设备330的WUR射频电路接收该WUR信标帧，并设置新的指定信道。
343、WLAN设备310在新的指定信道上发送WUR信标帧。
WLAN设备310在信道161上周期性地发送WUR信标帧。睡眠状态中的终端设备330在WLAN设备310的覆盖范围内时能够接收到该WUR信标帧。如果睡眠状态中的终端设备330离开WLAN设备310的覆盖范围，则不能够接收到该WUR信标帧。
344、WLAN设备320在新的指定信道上发送WUR信标帧。
WLAN设备310和WLAN设备320的指定信道相同。WLAN设备310将指定信道改变为信道161时，WLAN设备320的指定信道也变为信道161。指定信道改变后，WLAN设备320在信道161上周期性地发送WUR信标帧。睡眠状态中的终端设备330在进入WLAN设备320的覆盖范围后能够接收到该WUR信标帧。
345、WLAN设备320在新的指定信道上发送唤醒帧。
WLAN设备320要唤醒终端设备330时，WLAN设备320在信道161上发送包括终端设备330的标识的唤醒帧。该唤醒帧还包括对WLAN设备320的工作信道(信道48)的 指示。终端设备330的WUR射频电路接收该唤醒帧。
346、终端设备330的主射频电路在工作信道上发送对唤醒帧的响应。
终端设备330的WUR射频电路接收该唤醒帧后唤醒主射频电路。由于WUR射频电路不能发送无线信号，WUR射频电路不能在信道161上回复确认帧。因此，终端设备330的主射频电路在被唤醒后在信道48上发送对该唤醒帧的响应。
如果WLAN设备320在信道48上没有接收到对所述唤醒帧的响应，WLAN设备320在信道161上发送新的唤醒帧。该新的唤醒帧可以和上次发送的唤醒帧相同。该新的唤醒帧也可以和上次发送的唤醒帧不同。
347、WLAN设备320在确定终端设备330已被唤醒后在信道48上向终端设备330发送WLAN帧。
图4为本发明实施例中终端设备在两个WLAN设备覆盖范围内移动时的另一个例子。图4中终端设备430关联到WLAN设备410后进入睡眠状态。在睡眠状态中的终端设备430移动到WLAN设备420的覆盖范围后被WLAN设备420唤醒。例如，WLAN设备410为图1中的WLAN设备103，WLAN设备420为图1中的WLAN设备104，终端设备430为图1中的终端设备110。操作流程如下：
441、WLAN设备410在其工作信道上发送指定信道的信息，终端设备430的主射频电路接收到指定信道的信息后，根据该信息设置WUR射频电路的指定信道。
WLAN设备410的工作信道为信道44，指定信道为信道165。WLAN设备410在信道44上发送信道165的信息，终端设备430的主射频电路接收到信道165的信息后设置WUR射频电路的备份WUR信道为指定信道(信道165)。之后终端设备330进入睡眠状态。
442、WLAN设备410在工作信道上发送WUR信标帧。
WLAN设备410在信道44上周期性地发送WUR信标帧。如果WLAN设备410确定了新的指定信道，WLAN设备410在信道44上发送的WUR信标帧中指示新的指定信道。终端设备430的WUR射频电路接收该WUR信标帧，并设置备份WUR信道为新的指定信道。
443、睡眠状态中的终端设备430离开WLAN设备410的覆盖范围，无法接收WLAN设备410在工作信道上发送WUR信标帧。
睡眠状态中的终端设备430在WLAN设备410的覆盖范围内时能够接收到该WUR信标帧。如果睡眠状态中的终端设备430离开WLAN设备410的覆盖范围，则不能够接收信道44上的WUR信标帧。
444、WLAN设备420在工作信道上发送WUR信标帧。
WLAN设备420在工作信道为信道48。睡眠状态中的终端设备430不能得知其所在的覆盖范围的WLAN设备的工作信道。睡眠状态中的终端设备430的WUR射频电路仍工作在信道44上，因此不能够接收信道48上的WUR信标帧。在一个或多个WUR信标帧的信标间隔后，终端设备430仍然无法听到WUR信标帧，则WUR射频电路改为工作在备份WUR信道，即信道165上。
445、WLAN设备410在工作信道上发送唤醒帧。
WLAN设备410要唤醒终端设备430时，WLAN设备410在信道44上发送包括终端设备330的标识的唤醒帧。由于终端设备430离开了WLAN设备410的覆盖范围，并且终 端设备430的WUR射频电路工作在备份WUR信道，即信道165上，所以终端设备430无法接收到WLAN设备410的唤醒帧。
446、WLAN设备410通知各个WLAN设备在指定信道上发送唤醒帧。
由于终端设备430没有被唤醒，不会响应唤醒帧，WLAN设备410在信道44上没有接收到对唤醒帧的响应。可选的，WLAN设备410可以在信道44上发送新的唤醒帧。如果首次发送唤醒帧失败，或者重新发送唤醒帧仍然失败，WLAN设备410通知包括WLAN设备420在内的各个WLAN设备在指定信道(信道165)上发送包括终端设备430的标识的唤醒帧。并且各个唤醒帧包括对于对应的WLAN设备的工作信道的指示。终端设备430的WUR射频电路工作在备份WUR信道，即信道165上，所以终端设备430接收到WLAN设备420的唤醒帧。WLAN设备420的唤醒帧包括对WLAN设备420的工作信道(信道48)的指示。
447、终端设备430的主射频电路在唤醒帧指示的工作信道(信道48)上发送对唤醒帧的响应。
448、WLAN设备420在确定终端设备430已被唤醒后在信道48上向终端设备430发送WLAN帧。
图5为本发明实施例中唤醒终端设备的装置的示意图。该唤醒终端设备的装置由图1中任意WLAN设备实现。该唤醒终端设备的装置，包括唤醒模块502和发送模块504。唤醒模块，用于在指定信道上发送唤醒帧，该唤醒帧包括待唤醒的终端设备的标识。发送模块，用于在工作信道上发送WLAN帧。该唤醒终端设备的装置的细节参见前述图1-图4所示实施例的内容。
在上述实施例中，可以全部或部分地通过软件、硬件或者其组合来实现。当使用软件，或软件与硬件的组合实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在存储介质中，或者从一个存储介质向另一个存储介质传输。例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、双绞线或光纤)或无线(例如红外、无线或微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，光盘)、或者半导体介质(例如固态硬盘(SSD))等。
以上所述，仅为本发明的具体实施方式，但本发明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发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求的保护范围为准。

Claims (33)

  1. 一种终端设备，包括主射频电路和唤醒无线(WUR)射频电路，其中，
    所述WUR射频电路，用于仅接收无线信号，并且工作在指定信道上，如果在所述指定信道上接收到唤醒帧且所述终端设备为待唤醒的终端设备，唤醒所述主射频电路，其中，所述唤醒帧包括待唤醒的终端设备的标识；
    所述主射频电路用于在被唤醒后在所述主射频电路的工作信道上工作。
  2. 根据权利要求1所述的终端设备，其中，所述主射频电路还用于在所述主射频电路的工作信道上接收所述WUR射频电路的指定信道的信息。
  3. 根据权利要求1或2所述的终端设备，其中，所述主射频电路可用的工作信道为所述指定信道之外的无线局域网(WLAN)信道。
  4. 根据权利要求1-3任意一项所述的终端设备，其中，所述唤醒帧还包括对所述工作信道的指示，所述主射频电路用于在被唤醒后在所述唤醒帧指示的工作信道上工作。
  5. 根据权利要求1-4任意一项所述的终端设备，其中，所述WUR射频电路还用于接收WUR信标帧，如果所述WUR信标帧指示了新的指定信道，则工作在所述新的指定信道上。
  6. 根据权利要求1-5任意一项所述的终端设备，其中，所述主射频电路的工作频段和所述WUR射频电路的工作频段相同。
  7. 一种终端设备苏醒方法，包括：
    终端设备的唤醒无线(WUR)射频电路仅接收无线信号，并且工作在指定信道上；
    如果所述WUR射频电路接收到唤醒帧且所述终端设备为待唤醒的终端设备，所述WUR射频电路唤醒所述终端设备的主射频电路，其中所述唤醒帧包括待唤醒的终端设备的标识；
    所述主射频电路在被唤醒后在所述主射频电路的工作信道上工作。
  8. 根据权利要求7所述的方法，其中，所述方法还包括：所述主射频电路在所述 主射频电路的工作信道上接收所述WUR射频电路的指定信道的信息。
  9. 根据权利要求7或8所述的方法，其中，所述主射频电路可用的工作信道为所述指定信道之外的无线局域网(WLAN)信道。
  10. 根据权利要求7-9任意一项所述的方法，其中，所述唤醒帧还包括对所述工作信道的指示，所述方法还包括：所述主射频电路在被唤醒后在所述唤醒帧指示的工作信道上工作。
  11. 根据权利要求7-10任意一项所述的方法，其中，所述方法还包括：所述WUR射频电路接收WUR信标帧，如果所述WUR信标帧指示了新的指定信道，则所述WUR射频电路在所述新的指定信道上工作。
  12. 根据权利要求7-11任意一项所述的方法，其中，所述主射频电路的工作频段和所述WUR射频电路的工作频段相同。
  13. 一种唤醒终端设备的方法，包括：
    无线局域网(WLAN)设备在指定信道上发送唤醒帧，所述唤醒帧包括待唤醒的终端设备的标识；
    所述WLAN设备在工作信道上发送WLAN帧。
  14. 根据权利要求13所述的方法，其中，所述方法还包括：所述WLAN设备在所述工作信道上发送所述指定信道的信息。
  15. 根据权利要求13或14所述的方法，其中，所述WLAN设备可用的工作信道为所述指定信道之外的WLAN信道。
  16. 根据权利要求13-15任意一项所述的方法，其中，所述唤醒帧还包括对所述工作信道的指示。
  17. 根据权利要求13-16任意一项所述的方法，其中，所述待唤醒的终端设备的标识为组标识或广播标识，所述WLAN帧为组地址帧，所述WLAN设备在发送所述唤醒帧后的准备时期后在工作信道上发送所述WLAN帧。
  18. 根据权利要求13-17任意一项所述的方法，其中，所述方法还包括：
    所述WLAN设备在所述指定信道上周期性地发送唤醒无线(WUR)信标帧，所述WUR信标帧的发送独立于所述工作信道上的信标帧的发送。
  19. 根据权利要求18所述的方法，其中，所述方法还包括：
    所述WLAN设备在改变所述指定信道前，用所述WUR信标帧指示新的指定信道。
  20. 一种唤醒终端设备的装置，包括：
    唤醒模块，用于在指定信道上发送唤醒帧，所述唤醒帧包括待唤醒的终端设备的标识；
    发送模块，用于在工作信道上发送WLAN帧。
  21. 根据权利要求20所述的装置，其中，所述发送模块还用于在所述工作信道上发送所述指定信道的信息。
  22. 根据权利要求20或21所述的装置，其中，所述装置可用的工作信道为所述指定信道之外的无线局域网(WLAN)信道。
  23. 根据权利要求20-22任意一项所述的装置，其中，所述唤醒帧还包括对所述工作信道的指示。
  24. 根据权利要求20-23任意一项所述的装置，其中，所述待唤醒的终端设备的标识为组标识或广播标识，所述WLAN帧为组地址帧，所述发送模块还用于：在所述唤醒模块发送所述唤醒帧后的准备时期后在工作信道上发送所述WLAN帧。
  25. 根据权利要求20-24任意一项所述的装置，其中，所述唤醒模块还用于：在所 述指定信道上周期性地发送唤醒无线(WUR)信标帧，所述WUR信标帧的发送独立于所述工作信道上的信标帧的发送。
  26. 根据权利要求25所述的装置，其中，所述唤醒模块还用于：在改变所述指定信道前，用所述WUR信标帧指示新的指定信道。
  27. 一种无线局域网(WLAN)设备，包括处理器和收发器，其中，
    所述处理器用于：
    用所述收发器在指定信道上发送唤醒帧，所述唤醒帧包括待唤醒的终端设备的标识；
    用所述收发器在工作信道上发送WLAN帧。
  28. 根据权利要求27所述的WLAN设备，其中，所述处理器还用于：在所述工作信道上发送所述指定信道的信息。
  29. 根据权利要求27或28所述的WLAN设备，其中，所述WLAN设备可用的工作信道为所述指定信道之外的无线局域网WLAN信道。
  30. 根据权利要求27-29任意一项所述的WLAN设备，其中，所述唤醒帧还包括对所述工作信道的指示。
  31. 根据权利要求27-30任意一项所述的WLAN设备，其中，所述待唤醒的终端设备的标识为组标识或广播标识，所述WLAN帧为组地址帧，所述处理器用于：在发送所述唤醒帧后的准备时期后在工作信道上发送所述WLAN帧。
  32. 根据权利要求27-31任意一项所述的WLAN设备，其中，所述处理器还用于：
    在所述指定信道上周期性地发送唤醒无线(WUR)信标帧，所述WUR信标帧的发送独立于所述工作信道上的信标帧的发送。
  33. 根据权利要求32所述的WLAN设备，其中，所述处理器还用于：
    在改变所述指定信道前，用所述WUR信标帧指示新的指定信道。
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