WO2012163147A1 - 节省功耗的方法及站点设备 - Google Patents

节省功耗的方法及站点设备 Download PDF

Info

Publication number
WO2012163147A1
WO2012163147A1 PCT/CN2012/072886 CN2012072886W WO2012163147A1 WO 2012163147 A1 WO2012163147 A1 WO 2012163147A1 CN 2012072886 W CN2012072886 W CN 2012072886W WO 2012163147 A1 WO2012163147 A1 WO 2012163147A1
Authority
WO
WIPO (PCT)
Prior art keywords
sta
frame
txop
aid
ndpa
Prior art date
Application number
PCT/CN2012/072886
Other languages
English (en)
French (fr)
Inventor
杨绿溪
陈艳红
李云波
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 AU2012265526A priority Critical patent/AU2012265526B2/en
Priority to EP18156613.4A priority patent/EP3393177B1/en
Priority to RU2014102180/07A priority patent/RU2565049C2/ru
Priority to KR1020137033444A priority patent/KR101593290B1/ko
Priority to EP12792370.4A priority patent/EP2706792B1/en
Priority to KR1020167002485A priority patent/KR101675724B1/ko
Priority to BR112013032926-2A priority patent/BR112013032926B1/pt
Priority to ES12792370.4T priority patent/ES2675502T3/es
Publication of WO2012163147A1 publication Critical patent/WO2012163147A1/zh
Priority to US14/138,570 priority patent/US9743355B2/en
Priority to US15/656,889 priority patent/US10206172B2/en

Links

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
    • 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
    • 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
    • H04W52/0225—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
    • 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 embodiments of the present invention relate to communication technologies, and in particular, to a method for saving power consumption and a site device. Background technique
  • TXOP Transmission Opportunity
  • TXOP is the basic unit of wireless channel access, and the TXOP is composed of initial time and duration. The time period allows continuous use of the channel for the duration. Where the duration cannot exceed the maximum duration
  • BSS Basic Service Set
  • AP access point
  • Station station
  • STA station
  • the channel access process competes for the TXOP. Whether the AP or the STA obtains the TXOP, the channel can be used continuously without re-competing the channel for the duration of the TXOP. Since not all STAs receive data frames in a TXOP, a very high throughput (Very High Throughput; VHT) TXOP power save mode is introduced. It is found that no data frame is sent to it to enter the Doze state to save power during the TXOP.
  • VHT Very High Throughput
  • the STA In the sleep state, the STA can neither transmit data frames nor receive data frames, and the power consumed is very low.
  • a STA that supports TXOP power saving usually a non-AP VHT STA
  • the STA if the AP in the current frame allows the STA in the BSS to enter the Doze state during the TXOP, the STA enters when one of the following conditions is met. Doze state and until the current TXOP ends:
  • the non-AP VHT STA finds that it is not a member of the packet.
  • the non-AP VHT STA finds that the partial identifier (PARTIAL-AID) in RXVECTOR does not match its own partial AID, or the non-AP VHT STA finds that this frame is not sent to itself.
  • the non-AP VHT STA finds itself to be a member of the packet, but the number of space-time streams in the RXVECTOR it receives (Number of Space-Time Streams; the cartridge is called: NUM_STS) Set to 0.
  • the non-AP VHT STA sends an acknowledgment signal in response to the received More Data field set.
  • the AP may also request the STA to feed back channel state information through a null packet notification (Null Data Packet Announcement; NDPA) frame (Channel State Information; CSI) information.
  • NDPA Null Data Packet Announcement
  • CSI Channel State Information
  • the embodiments of the present invention provide a method for saving power consumption and a site device, which is used to reduce power consumption during a TXOP when multiple APs feed back CSI information, and save resources.
  • Embodiments of the present invention provide a method for saving power consumption, including:
  • the station STA Determining, by the station STA, the frame type identifier in the received frame, the frame is an empty data packet to advertise an NDPA frame, and acquiring an STA association identifier AID in the STA information field in the NDPA frame; the STA will be its own STA
  • the AID is compared with the obtained STA AID, and determines whether the STA AID of the UE is the same as the acquired STA AID.
  • the embodiment of the invention provides a site device, including: Determining, by the frame according to the frame type identifier in the received frame, that the frame is an empty data packet to advertise an NDPA frame, and acquiring a STA STA association identifier in the STA information field in the NDPA frame. AID;
  • a determining module configured to compare the STA AID of the site device with the obtained STA AID, and determine whether the STA AID of the site device itself is the same as the acquired STA AID;
  • the entry module is configured to allow to enter a sleep state when the judgment result of the determination module is negative.
  • the method for saving power consumption and the site device in the embodiment of the present invention when receiving an NDPA frame, the STA determines whether the STA AID in the STA information field in the NDPA frame is the same as its own STA AID. If not, it determines that it is not STAs that belong to the AP and request to return CSI information are allowed to enter the sleep state, which reduces the power consumption of the STA itself and saves resources.
  • FIG. 1A is a flowchart of a method for saving power according to an embodiment of the present invention
  • FIG. 1B is a partial structural diagram of an NDPA frame parsed into a MAC layer according to an embodiment of the present invention
  • FIG. 1C is a schematic structural diagram of a STAAID field according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for saving power according to another embodiment of the present invention.
  • FIG. 3 is a flowchart of a method for saving power according to another embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a site device according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a site device according to another embodiment of the present invention. detailed description
  • FIG. 1A is a flowchart of a method for saving power according to an embodiment of the present invention. As shown in FIG. 1A, the method in this embodiment includes:
  • Step 101 The STA determines, according to the frame type identifier in the received frame, that the received frame is an NDPA frame, and acquires the STA of the STA information field (STA Info field) in the NDPA frame.
  • Association Identifier (referred to as: AID).
  • APs and STAs can work in two modes, one is single-user mode and the other is multi-user mode.
  • the single-user mode means that the AP communicates with only one STA or communicates with multiple STAs in a broadcast manner.
  • the multi-user mode means that the AP simultaneously communicates with multiple STAs in a space division multiplexing manner.
  • the NDPA frame in each embodiment of the present invention belongs to a frame in a single user mode that the AP transmits in a broadcast manner.
  • the STAs are group managed, and each packet has a unique group identifier ( GROUP_ID). Each STA knows the packet to which it belongs, and stores the GROUP_ID of the belonging packet locally.
  • the AP When the AP competes to the TXOP through the channel access procedure, the AP is in the TXOP duration.
  • the STA sends a data frame.
  • the AP carries the GROUP_ID in the data frame sent to the STA, and when the STA receives the data frame, it compares the GROUPJD in the data frame with the locally stored GROUP_ID to determine whether the data frame is sent to Grouped by yourself. If the locally stored GROUPJD is different from the GROUPJD in the data frame, it is determined that the data frame is not sent to the group it is in.
  • NUM_STS is used to identify the number of space-time streams for a STA in a packet.
  • the AP When sent in single-user mode, the AP sends the data frame to the STA.
  • PARTIAL_AID and when the STA receives the data frame, it compares the PARTIAL_AID in the data frame with its own PARTIAL_AID to determine whether the data frame is sent to itself. If the PARTI AL_AID of the data is different from the PARTIAL_AID in the data frame, it is determined that the data frame is not sent to itself. If the PARTIAL_AID of the data frame is the same as the PARTIAL_AID in the data frame, it is further determined according to the information in the medium access control (Medium Access Control; cartridge: MAC) header (for example, the receiving MAC address) whether the data is sent. Give it to yourself.
  • Medium Access Control Medium Access Control
  • the AP in addition to sending data frames to the STA, the AP sometimes needs the STA to feed back CSI information.
  • the AP sets the GROUP_ID in the transmission parameter vector (TXVECTOR) in the NDPA frame to 63, and sets the PARTIAL_AID to 0.
  • GROUP_ID is set to 63, and PARTIAL_AID is set to 0.
  • the current frame is a broadcast frame, and all STAs need to be received. In fact, the AP does not need all the STAs to feed back CSI information.
  • the AP sets the AID of each STA that requests the feedback CSI information to the STA information field of the NDPA frame.
  • the number of STA information fields is equal to the number of STAs that need to feed back CSI. .
  • the partial structure of the NDPA frame in the embodiment is parsed into the MAC layer, as shown in FIG. 1B.
  • the MAC layer information carried in the NDPA frame mainly includes: Frame Control, Duration, Duration of the MAC address of the AP (the MAC address of the AP), and MAC address of the receiver (ie, the broadcast domain).
  • the corresponding MAC address usually pre-set, Sounding Sequence, one or more STA information fields and Frame Check Fields (FCS).
  • the frame control field includes information such as the type of the current frame, and whether the current frame is an NDPA frame can be determined by using a frame control field.
  • the STA information field is used to store the AID of the STA that the AP requests to return CSI information.
  • the NDPA frame when an AP requires multiple STAs to return CSI information, the NDPA frame includes multiple STA information fields.
  • the structure of each STA information field is as shown in FIG. 1C, and includes an AID field, a Return Type field, and a column number indication (Nc Index) field of the STA.
  • the STA After receiving the frame sent by the AP, the STA first performs physical layer analysis on the currently received frame. When the current frame is identified as a broadcast frame according to the information in the physical layer header, the STA further The received frame is subjected to MAC layer parsing; the frame control field in the MAC layer frame header is obtained, and according to the frame type identifier in the frame control field, it is determined whether the currently received frame is an NDPA frame. The values of the frame category identifiers corresponding to different types of frames are different. In this embodiment, the STA determines, according to the value of the frame class identifier, that the current frame is an NDPA frame, and from the NDPA. A plurality of STA information fields are obtained in the frame, and then multiple STA information fields are parsed to obtain the STAAID.
  • Step 102 The STA compares the STA AID of the STA with the acquired STA AID, and determines whether the STA AID of the STA is the same as the obtained STA AID. If the judgment result is yes, the STA information field of the NDPA frame includes the STA AID of the STA itself. Step 103 is performed. If the result of the determination is no, that is, the STA information field of the NDPA frame does not include the STA AID of the STA itself, step 104 is performed.
  • the STA After the STA obtains the STAAID carried in the NDPA frame, the STA compares the STA AID with the acquired STA AID, and determines whether the STA AID of the STA is the same as the obtained STA AID, that is, whether the STA itself belongs to the AP and needs to return the CSI information. STA. If the STA's own STA AID is the same as the obtained STA AID, the STA is the STA that the AP requests to return CSI information. If the STA's own STA AID is different from the obtained STA AID, the STA is not the STA that the AP requests to return CSI information, or the AP does not require the STA to return CSI information.
  • the STA needs to compare its STA AID with the STA AID in each STA information field in the NDPA frame to determine whether it belongs to the AP and returns the CSI information. STA.
  • Step 103 Return CSI information to the AP.
  • the STA When the AP requests the STA to return the CSI information, the STA must be in the Awake state, that is, in the fully powered state, to return the CSI information to the AP. After the STA returns the CSI information to the AP, the operation for saving power by allowing the sleep mode to be entered may be ended.
  • the STAs other than the first STA in the STA information domain need to obtain the CSI feedback of the STA through the Beamforming Report Poll frame sent by the AP.
  • the Beamforaiing Report Poll frame is usually sent in single-user mode. If it is sent in the physical layer format of VHT, it will be due to the PARTIAL_AID parameter and the first STA in the STA information field list.
  • the PARTIAL_AIDs of the STAs other than the STAs do not match, causing STAs other than the first STA in the STA information domain list to erroneously enter the Doze state.
  • the STA determines that its AID matches the AID in the STA information field of the NDPA frame, the STA is no longer allowed to enter the Doze state in the current TXOP.
  • the STA determines that its AID matches the AID in the STA information field of the NDPA frame, if the STA receives the Beamforming Report Poll frame, even if the STA finds that the STA is not the target of the Beamforming Report Poll frame
  • the address that is, the PARTIAL_AID parameter in the Beamforming Report Poll frame does not match the STA's PARTIAL_AID parameter
  • the STA determines that its AID matches the AID in the STA information field of the NDPA frame, before receiving the Beamforming Report Poll frame sent by the AP, even if the STA finds that it is not the Beamforming Report Poll frame,
  • the destination address that is, the PARTIAL_AID parameter in the Beamforaiing Report Poll frame does not match its own PARTI AL_AID parameter
  • the fourth method when the Beamforming Report Poll frame is sent using the VHT format physical layer, set the TXOP_PS_NOT_ALLOWED parameter to 1.
  • the fifth method sends the Beamforming Report Poll frame using the legacy physical layer format.
  • Step 104 Allow entry into the Doze state.
  • the STA When the AP does not require the STA to return the CSI information, the STA does not need to return the CSI information to the AP. Under this condition, the STA does not need to be in the full power supply state, so the STA can enter the Doze state. However, for a STA, there are many factors that restrict its power supply status. For example: If the STA has data waiting to be sent at this time, it may choose not to enter the Doze state so that the current TXOP may be truncated, etc. Opportunity to the channel.
  • the STA determines that it is allowed to enter the Doze state without the need to feed back the CSI information, it further judges other entry conditions, and when other entry conditions are also satisfied, enters the Doze state, and wakes up until the current TXOP ends. . If there are no other entry conditions, the STA can directly enter the Doze state.
  • the STA determines whether the received frame is an NDPA frame by identifying the received frame as an NDPA frame, and determining whether the STA AID of the NDPA frame is compared with the STA AID of the NDPA frame. It is necessary to feed back CSI information and determine that it is not necessary to feed back CSI information, allowing access to the Doze state, reducing power consumption and saving resources.
  • FIG. 2 is a flowchart of a method for saving power according to another embodiment of the present invention. As shown in FIG. 2, the method in this embodiment includes:
  • Step 201 The STA receives a frame sent by the AP.
  • various types of frames such as control frames, data frames, and the like, can be sent to the STA during the duration of the TXOP.
  • the STA receives the frame sent by the AP.
  • Step 202 The STA performs physical layer analysis on the received frame, and obtains an instruction for allowing the TXOP to save power from the physical layer header information.
  • the STA When receiving the frame sent by the AP, the STA first performs physical layer analysis on the received frame to obtain physical layer related information carried in the physical layer header.
  • the information in the physical layer header includes whether the current frame is a broadcast frame, so the STA may determine, according to the physical layer header information, whether the received frame is broadcast frame information. In this embodiment, the STA determines, according to the physical layer header information, that the received frame is a broadcast frame.
  • the STA can enter the Doze state only if the AP allows the STAs in its BSS to enter the Doze state.
  • the AP indicates whether to allow the STAs in the BSS in which the STA is located to perform TXOP power saving by using a certain bit in the physical layer header of the frame transmitted to the STA.
  • the AP uses a very high throughput-information-A1 (very High Throughput-SIGNAL-Al; cartridge: VHT-SIG-A1) field in the physical layer header to carry power transmission (Transmit Opportunity_Power Save_NOT_ ALLOWED; The barrel is called: TXOP_PS_NOT_ALLOWED )
  • TXOP_PS_NOT_ALLOWED The bit of this parameter identifies the instruction that allows TX0P to save power.
  • TXOP_PS_NOT_ALLOWED is set to 0, which means that the STA is allowed to perform TXOP power saving.
  • the STA has the opportunity to enter the Doze state, that is, the instruction that allows the TXOP to save power; TXOP_PS_NOT_ALLOWED is set to 1, indicating that the STA is not allowed to perform TXOP power saving, that is, STA Cannot enter the Doze state, that is, the instruction that does not allow the TXOP to save power.
  • the information of the electrical command is represented by the value of the bit in the physical layer header carrying the parameter TXOP_PS_NOT_ALLOWED. The STA obtains the value of the bit identifying the TXOP_PS_NOT_ALLOWED parameter from the physical layer header, and the value of the bit is 0, that is, the instruction for allowing the TXOP to save power is obtained.
  • Step 203 The STA performs MAC layer parsing on the received frame, determines that the received frame is an NDPA frame according to the frame type identifier in the MAC layer frame header, and obtains the STA AID from the STA information field in the NDPA frame.
  • the STA determines that the received frame is a broadcast frame
  • the NDPA frame is further parsed, that is, the MAC layer parses the MAC layer information carried in the frame.
  • the STA according to the frame control field in the MAC frame header carries the frame type identifier of the current frame, and can identify that the currently received frame is an NDPA frame, and obtain the STA information field in the NDPA frame, further performing the STA information field. Analyze the STA AID.
  • Step 204 The STA compares its own STA AID with the STA AID obtained from the STA information field in the NDPA frame, and determines whether the STA AID of the STA is the same as the obtained STA AID. If the determination result is yes, go to step 205; If the result of the determination is no, step 206 is performed.
  • Step 205 Return CSI information to the AP. At this point, you can end this operation for saving power by allowing access to sleep mode. However, after this judgment, even if the STA whose own STA AID is the same as the acquired STA AID, it is possible to subsequently enter the allowable sleep state by satisfying other conditions for allowing sleep. The method described in step 103 can be continued for subsequent operations.
  • Step 206 allowing access to the Doze state.
  • the description of the foregoing step 102 to step 104 can be omitted, and details are not described herein again.
  • the STA obtains an instruction that the AP allows the STA to enter the Doze state from the NDPA frame by performing physical layer analysis on the received frame, and lays a foundation for determining whether the STA is allowed to enter the Doze state. Further, in this embodiment, when the STA learns that the AP does not allow the STA to enter the Doze state, the STA may directly end the operation, thereby saving power consumption.
  • FIG. 3 is a flowchart of a method for saving power according to another embodiment of the present invention.
  • the embodiment is implemented based on the embodiment shown in FIG. 2.
  • the method in this embodiment includes before step 201: Step 200: The STA receives the previous frame of the current frame, and performs the previous frame of the current frame. Physical layer parsing, get instructions that do not allow TXOP to save power.
  • the STA receives the other VHT format frames sent by the AP before receiving the current frame (ie, the NDPA frame), and also carries the frames in other VTH format frames.
  • There is an instruction of whether the AP allows the STA to perform TXOP power saving ie, whether to allow the STA to enter the Doze state).
  • the STA needs to determine, according to the physical layer header information in the previous frame of the current frame, that the AP does not allow the STA to enter the Doze state, but according to the physical layer of the current frame.
  • the header information determines that the AP allows the STA to enter the Doze state.
  • the STA when receiving the frame sent by the AP, the STA needs to perform physical layer analysis on the received frame, and judge according to the TXOP_PS_NOT_ALLOWED parameter in the physical layer header.
  • the NDPA frame or other frames during the TXOP may be VHT formatted frames.
  • the frame or NDPA frame during the TXOP may also be a VHT format frame.
  • the STA determines, according to the previous frame of the current frame (ie, the NDPA frame), that the AP does not allow the STA to perform power saving of the TXOP before the current time, that is, the STA is not allowed to enter.
  • the Doze state and determining the current time according to the current frame, allows the STA to perform TXOP power saving, and then performs subsequent operations to determine whether to allow the operation to enter the Doze state, which lays a foundation for saving power in the Doze state.
  • a STA sends some data frames to some STAs during a TXOP, and then some STAs are required to feed back CSI information, since some STAs need to receive data frames, the VHT TXOP power saving mode cannot be applied to the entire TXOP period.
  • a BSS includes at least 4 STAs and an AP.
  • the AP sends data frames to the first STA and the second STA. Therefore, during this time, the AP passes the TXOP_PS_NOT_ALLOWED in the transmitted data frame.
  • the parameter is set to 1, which means that the STA is not allowed to enter the Doze state, and all STAs are in the Awake state.
  • the AP requests the third STA and the fourth STA to feed back the CSI information.
  • the AP sets the TXOP_PS_NOT_ALLOWED parameter in the NDPA frame to 0, indicating that ST A is allowed to enter the Doze state. Since the NDPA frame is sent in broadcast, all STAs will receive it.
  • the AP For the STA, according to the TXOP_PS_NOT_ALLOWED parameter in the previous data frame of the NDPA frame, it is learned that the AP does not allow the STA to enter the Doze state at the time, and according to the TXOP_PS_NOT_ALLOWED parameter in the NDPA frame, the AP allows the STA to enter the Doze state, under the condition.
  • STAs that do not request feedback of CSI information by APs can determine that they can enter the Doze state according to the method shown in Figure 1A, Figure 2 or Figure 3, and enter the Doze state when the entry conditions are met, to reduce power consumption and save resources. .
  • the STA also periodically receives the beacon frame sent by the AP, where the beacon frame includes an instruction for allowing the BSS where the STA is located to perform TXOP power saving; and the STA acquires the BSS of the allowed STA in the beacon frame to perform the TXOP.
  • Power saving instructions Specifically, the AP indicates whether to allow the basic service set to perform the TXOP province by using the bit of the parameter of the Very High Throughput Transmit Opportunity Power Save (VHT TXOP PS) parameter in the beacon frame. Electric instructions. Among them, setting VHT TXOP PS to 1 indicates that the basic service set of the STA is allowed to perform TXOP power saving instruction, and setting VHT TXOP PS to 0 means not allowed.
  • VHT TXOP PS Very High Throughput Transmit Opportunity Power Save
  • the basic service set of the STA is used to perform the TXOP power saving instruction.
  • the AP broadcasts the beacon frame to announce whether the BSS has the capability of saving power of the TXOP. Only when the BSS has the capability of saving power of the TXOP, the AP can send an instruction to the STA whether to allow the STA to perform power saving of the TXOP and subsequent operations. Therefore, the AP sends a command to the STA through the beacon frame to include the BSS that allows the STA to perform TXOP power saving.
  • the foregoing embodiments of the present invention are further described.
  • the foregoing embodiments of the present invention provide a new method for the STA to determine whether to allow entry into the Doze state, which provides a basis for the STA to enter the Doze state, and enters the Doze for the STA.
  • the state to save power has laid the foundation.
  • the STA When the AP competes with the TXOP, it will send various types of frames to the STA, such as: control frames, data frames, broadcast frames (NDPA frames), and so on.
  • control frames For all STAs have data frame reception during TXOP, and STAs that do not receive data frames can enter the Doze state to save power.
  • the STA needs the following prerequisites: First, the AP allows the BSS to perform the TXOP power saving mode; Second, the AP allows the STA to enter the Doze state, and third, the STA itself supports the TXOP power saving mode; If the preconditions are met, the STA can further determine whether it can enter the Doze state. Therefore, in this embodiment, first, if the foregoing several preconditions are satisfied, the STA determines whether the Doze state can be entered:
  • the STA receives the frame sent by the AP, performs physical layer analysis on the received frame, acquires physical layer header information, further performs MAC layer parsing on the received frame, and obtains MAC layer frame header information. To include: (1) The STA determines that the local STA is not a member of the packet corresponding to the data frame according to the GROUPJD in the Receive Vector Parameter (RXVECTOR) in the data frame. (2) The STA is based on the STA part identifier (PARTIAL_AID) in the receive vector parameter (RXVECTOR) in the data frame, or according to the STA part identifier (PARTIAL_AID) in the receive vector parameter (RXVECTOR) in the data frame and the STA AID of the MAC layer.
  • the STA determines, according to the GROUP_ID in the receiving vector parameter (RXVECTOR) in the data frame, that the local STA is a member of the packet corresponding to the data frame, but determines that the data frame is not sent according to NUM_SYS in the receiving vector parameter (RXVECTOR) For the local STA.
  • the STA sends a determination signal in response to the received data frame with the More Data field being 0.
  • the STA finds that the STA AID in the STA information field in the NDPA frame is different from its STA AID.
  • the operation procedure of the STA may be: the STA first obtains physical layer header information, where mainly refers to the GROUP_ID in the receiving vector parameter (RXVECTOR); then the STA will receive the vector parameter (RXVECTOR).
  • the GROUP_ID is compared with the GROUP_ID stored locally by the STA; if the comparison result is the same, the STA determines that it belongs to the packet corresponding to the data frame; if the comparison result is different, the STA determines that it does not belong to the packet corresponding to the data frame.
  • the packet corresponding to the data frame refers to the packet identified by the GROUP_ID in the data frame.
  • the STA determines that it belongs to the packet corresponding to the data frame, it indicates that the AP sends a data frame to the packet, and the STA cannot enter the Doze state as one of the members; when the STA determines that it does not belong to the packet corresponding to the data frame, it indicates that the current AP is The data frame is not sent to the packet where the STA is located, and the STA enters the Doze state to save power.
  • the operation procedure of the STA may be: The STA first obtains the physical layer header information carried in the data frame, where mainly refers to the STA part identifier (PARTIAL_AID) in the receiving vector parameter (RXVECTOR); then the STA will The STA Part Identifier (PARTIAL_AID) in the Receive Vector Parameter (RXVECTOR) is compared to the Local STA Part Identifier (PARTIAL_AID). If the comparison result is that the two STAs have the same identifier, the data frame may be sent to the STA, so the STA further determines to obtain the MAC layer information in the data frame, where the MAC address is mainly referred to herein; The obtained MAC address is compared with its own MAC address.
  • the comparison result is that the two MAC addresses are the same, it is determined that the data frame is sent to itself, and the current STA has a data frame to receive, so the Doze state cannot be entered. If the comparison result is that the two STA part identifiers (PARTIAL_AID) are not the same, the STA can directly determine the The data frame is not sent to itself, so the STA can enter the Doze state to save power.
  • PARTIAL_AID part identifiers
  • the operation procedure of the STA may be: The STA first obtains the physical layer header information carried in the data frame, where mainly refers to the GROUPJD in the receiving vector parameter (RXVECTOR); then the STA will receive the vector parameter (RXVECTOR)
  • the GROUP_ID in the comparison is compared with the locally stored GROUPJD; if the comparison result is the same, the STA determines that it belongs to the packet corresponding to the data frame; if the comparison result is different, the STA determines that it does not belong to the packet corresponding to the data frame .
  • the packet corresponding to the data frame refers to the group of the GROUPJD identifier in the data frame.
  • the STA determines that it belongs to the packet corresponding to the data frame, it indicates that the AP sends a data frame to the packet where the STA is located; further, the STA acquires NUM_STS in the receiving vector parameter (RXVECTOR), where the NUM_STS represents the space-time stream sent by the AP to the STA. Number: When NUM_STS is not 0, it indicates that the AP is sending data packets to the STA, and the STA cannot enter the Doze state. When NUM_STS is 0, it indicates that the AP does not send data frames to the STA, so the STA enters the Doze state to save power. .
  • the STA determines that it does not belong to the packet corresponding to the data frame, it indicates that the current AP does not send a data frame to the packet to which it belongs, and the STA can enter the Doze state to save power consumption, and the scenario is the first condition.
  • the STA may be: The STA first obtains the More Data field in the data frame, and determines whether the More Data field is 0. The More Data field indicates whether the data frame is sent by the AP during the TXOP. The last data frame. After the STA sends an acknowledgement frame to respond to the received data frame with the More Data field of 0, it can enter the Doze state to save power.
  • the operation procedure of the STA may be: the STA obtains the MAC layer frame header information, firstly the frame type identifier, determines that the frame is an NDPA frame, and then obtains the STA AID in the NDPA frame, and determines the STA AID in the NDPA frame. Different from its own STA AID, it indicates that the AP does not require it to return CSI information, so it can enter the Doze state to save power.
  • the STA determines that it can enter the Doze state and the other entry conditions are also satisfied, the STA can enter the Doze state until the TXOP ends and wakes up again. Enter one Step Description In the actual application, the STA judges whether it can enter the Doze state only according to the above five conditions, but does not limit the order of the above five conditions. The STA can enter the Doze state as long as one of the above five conditions is met.
  • the STA identifies the NDPA frame, and compares the STA AID carried in the NDPA frame with its STA AID. Whether it needs to return CSI information itself, when it is determined that it is not necessary to return CSI information, it enters the Doze state, which saves power consumption.
  • FIG. 4 is a schematic structural diagram of a site device according to an embodiment of the present invention.
  • the site device in the embodiment of the present invention may be a site STA or an access point AP in a wireless local area network.
  • the site device can be a STA or A P capable of multi-user transmission and can enter a power saving mode.
  • the site device 40 of this embodiment includes: a first obtaining module 41, a determining module 42 and an entering module 43.
  • the first obtaining module 41 is configured to determine, according to the frame type identifier in the received frame, that the received frame is an NDPA frame, and obtain a STA AID in the STA information field in the NDPA frame.
  • the determining module 42 is connected to the first obtaining module 41, and is configured to compare the STA AID of the site device itself with the obtained STA AID, and determine whether the STA AID of the site device itself is the same as the obtained STA AID.
  • the entry module 43 connected to the determination module 42, is configured to allow a sleep state when the determination result of the determination module 42 is negative.
  • the site device in this embodiment may be a STA, and the foregoing various functional modules may be used to perform the process of the method for saving power consumption shown in FIG. 1.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the site device of the present embodiment compares the STA AID carried in the NDPA frame with the STA AID of the NDPA frame, and determines whether it needs to return the CSI information, in the scenario that the AP requires multiple STAs to return the CSI information.
  • the Doze state is allowed to enter, and when the other entry conditions are satisfied, the Doze state is entered, which saves power consumption.
  • FIG. 5 is a schematic structural diagram of a site device according to another embodiment of the present invention. This embodiment is based on Figure 4 As shown in FIG. 5, the first obtaining module 41 of the site device 50 of the embodiment includes: a receiving unit 411, a parsing unit 412, and an obtaining unit 413.
  • the receiving unit 411 is configured to receive a frame sent by the AP.
  • the parsing unit 412 is connected to the receiving unit 411 and performs MAC layer parsing on the frame received by the receiving unit 411.
  • the obtaining unit 413 is connected to the parsing unit 412, and is configured to determine, according to the value of the frame type identifier in the MAC layer frame header, that the received frame is an NDPA frame, and obtain the STA AID from the STA information in the NDPA frame.
  • the functional units of the first module can be used to perform the process shown in step 101 in the embodiment shown in FIG. 1.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the site device of this embodiment further includes: a second acquiring module 51.
  • the second obtaining module 51 is configured to: after the first acquiring module 41 determines, according to the frame type identifier in the received frame, that the received frame is an NDPA frame, and acquires the STA AID in the NDPA frame, and receives the STA AID in the NDPA frame, The frame performs physical layer analysis to obtain an instruction that allows the TXOP to save power, and lays a foundation for the first acquisition module 41.
  • the second obtaining module 51 is specifically configured to obtain a value in the VHT-SIG-AI that identifies a bit that does not allow TXOP power saving (ie, TXOP_PS_NOT_ALLOWED), where the value of the bit is 0.
  • the foregoing second obtaining module 51 is specifically configured to perform the process of the method for saving power consumption shown in FIG. 2, and the specific working principle is not described herein. For details, refer to the description of the method embodiment.
  • the site device of this embodiment further includes: a third obtaining module 52.
  • the third obtaining module 52 is configured to perform physical layer analysis on the previous frame of the current frame when the current frame is not the first frame of the current TXOP, and obtain an instruction that does not allow the TXOP to save power, and perform corresponding operations for subsequent functional modules or units. The operation lays the foundation.
  • the third obtaining module 52 is specifically configured to obtain a value in the VHT-SIG-AI that identifies a bit that does not allow TXOP power saving (ie, TXOP_PS_NOT_ALLOWED), where the value of the bit is 1.
  • the third obtaining module 52 is specifically configured to perform the process of the power saving method shown in FIG. 3, and the specific working principle is not described herein. For details, refer to the description of the method embodiment.
  • the site device of this embodiment further includes: a receiving module 53.
  • Receiving module 53 It is configured to receive a beacon frame that is periodically sent by the AP, and obtain an instruction that allows the BSS of the station device to perform TXOP power saving in the beacon frame, and lays a foundation for performing the corresponding operations on the foregoing functional modules or units of the site device.
  • the receiving module 53 is specifically configured to obtain a value of a bit in the beacon frame that identifies a very high throughput transmission opportunity power saving (ie, VHT TXOP PS ), where the value of the bit is 1.
  • the site device of this embodiment determines, by using the foregoing second obtaining module, the third obtaining module, and the receiving module function module, various prerequisite conditions required for the site device to enter the Doze state, where the first acquiring module, the determining module, and the entering module are Under the condition that the AP requires multiple site devices to return CSI information, the operation of the site device to enter the Doze state lays a foundation, which provides a guarantee for the site device to enter the Doze state when the condition is met to reduce power consumption.
  • a person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Landscapes

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

Abstract

提供一种节省功耗的方法及站点设备。方法包括：STA根据接收到的帧中的帧类别标识，确定帧为NDPA帧，并获取NDPA帧中STA信息域中的STA AID；STA将自身的STA AID与获取的STA AID进行比较，判断自身的STA AID是否与获取的STA AID相同；当STA判断出自身的STA AID与获取的STA AID不相同时，允许进入睡眠状态。本发明实施例可以降低TXOP期间的功耗，节约资源。

Description

节省功耗的方法及站点设备 技术领域
本发明实施例涉及通信技术， 尤其涉及一种节省功耗的方法及站点设 备。 背景技术
现有的无线局域网标准增强了对服务质量（Quality of Service; 筒称为： QoS )的支持。 其中， 混合协调功能（ Hybrid Coordination Function; 筒称为： HCF )机制下的传输机会 ( Transmission Opportunity; 筒称为： TXOP )是无 线信道接入的基本单元， TXOP由初始时间和持续时间组成的有界时段， 允 许在持续时间内连续使用信道。 其中， 持续时间不能超过最大持续时间
( TXOP Limit )。
在由接入点（Access Point; 筒称为： AP )和多个站点（ Station; 筒称为： STA )构成的基本服务集（Basic Service Set; 筒称为： BSS ) 中， AP和 STA 通过信道接入过程竟争 TXOP。 无论是 AP还是 STA—旦获得 TXOP, 在 TXOP 持续时间内不用重新竟争信道而可以连续使用信道。 由于在一个 TXOP内， 并不是所有 STA都要接收数据帧， 因此引入了一种非常高吞吐量（Very High Throughput; 筒称为： VHT ) TXOP省电模式（ VHT TXOP power save mode ) , 当 STA发现没有数据帧发送给它时进入睡眠（Doze )状态， 以在 TXOP期间 节省功耗。 在睡眠状态下， STA既不能发送数据帧也不能接收数据帧， 所消 耗的功率非常低。 对于一个支持 TXOP省电的 STA (通常来说为非 AP VHT STA ) 来说， 如果当前帧中 AP允许本 BSS内的 STA在 TXOP期间进入 Doze状 态， 则当满足以下条件之一时 STA就会进入 Doze状态并且直到当前 TXOP结 束：
( 1 )通过接收参数向量（ RXVECTOR )中的分组标识（ GROUP_ID ) 参 数， 非 AP VHT STA发现自己不是分组中的一员。 ( 2 ) 非 AP VHT STA发现 RXVECTOR中的部分标识 ( PARTIAL—AID ) 和自己的部分 AID不符， 或者非 AP VHT STA发现这一帧并不是发送给自己 的。
( 3 ) 通过 RXVECTOR中的 GROUP_ID参数指示， 非 AP VHT STA发现 自己是分组中的一员，但是它接收到的 RXVECTOR中的空时流数目（ Number of Space-Time Streams； 筒称为： NUM_STS )设为 0。
( 4 )非 AP VHT STA发送一个确认信号来响应接收到的 More Data域设为
0的帧。 在实际应用过程中， AP除了给 STA发送数据帧外， 还可能通过空数据 包通告（Null Data Packet Announcement; 筒称为： NDPA )帧要求 STA反馈 信道状态信息（Channel State Information; 筒称为： CSI )信息。 当 AP要求 多个但并不是全部 STA反馈 CSI信息时， 通过将 NDPA帧的发送参数向量 ( TXVECTOR )中 GROUP_ID设为 63, 将 PARTIAL_AID设为 0以广播的 方式通告所有 STA其要求多个 STA反馈 CSI信息。 此时， 所有 STA都不符 合进入睡眠状态的任意一个条件， 因此均处于觉醒（Awake )状态。 由于在 Awake状态下， STA是完全供电的， 故在 TXOP期间将会消耗较多的功耗。 发明内容
本发明实施例提供一种节省功耗的方法及站点设备， 用以降低 AP要求 多个 STA反馈 CSI信息时 TXOP期间的功耗， 节约资源。
本发明实施例提供一种节省功耗的方法， 包括：
站点 STA根据接收到的帧中的帧类别标识， 确定所述帧为空数据包通 告 NDPA帧，并获取所述 NDPA帧中 STA信息域中的 STA关联标识符 AID; 所述 STA将自身的 STA AID与所述获取的 STA AID进行比较，判断自 身的 STA AID是否与所述获取的 STA AID相同；
当所述 STA判断出自身的 STA AID与所述获取的 STA AID不相同时， 允许进入睡眠状态。 本发明实施例提供一种站点设备， 包括： 第一获耳 5^莫块， 用于根据接收到的帧中的帧类别标识， 确定所述帧为空 数据包通告 NDPA帧，并获取所述 NDPA帧中 STA信息域中的站点 STA关 联标识符 AID;
判断模块，用于将所述站点设备自身的 STA AID与所述获取的 STA AID 进行比较， 判断所述站点设备自身的 STA AID是否与所述获取的 STA AID 相同；
进入模块，用于在所述判断模块的判断结果为否时，允许进入睡眠状态。 本发明实施例的节省功耗的方法及站点设备， 在接收到 NDPA 帧时， STA通过判断 NDPA帧中 STA信息域中的 STA AID中是否与自身的 STA AID相同， 如果不相同， 确定本身不属于 AP要求返回 CSI信息的 STA, 则 允许进入睡眠状态， 降低 STA本身的功耗， 节约了资源。 附图说明 图 1A为本发明一实施例提供的节省功耗的方法的流程图；
图 1B为本发明一实施例中 NDPA帧被解析到 MAC层时的部分结构示 意图；
图 1C为本发明一实施例中 STAAID域的结构示意图；
图 2为本发明另一实施例提供的节省功耗的方法的流程图；
图 3为本发明又一实施例提供的节省功耗的方法的流程图；
图 4为本发明一实施例提供的站点设备的结构示意图； 图 5为本发明另一实施例的站点设备的结构示意图。 具体实施方式
图 1A为本发明一实施例提供的节省功耗的方法的流程图。 如图 1A所 示， 本实施例的方法包括：
步骤 101、 STA根据接收到的帧中的帧类别标识， 确定接收到的帧为 NDPA帧， 并获取 NDPA帧中 STA信息域（ STA Info field ) 中的 STA的关 联标识符（Association Identifer; 筒称为： AID ) 。
在 BSS中， AP和 STA可以工作在两种模式下， 一种是单用户模式， 一 种是多用户模式。 其中， 单用户模式是指 AP仅与一个 STA通信， 或者以广 播方式与多个 STA进行通信；多用户模式是指 AP以空分复用的方式同时与 多个 STA进行通信。 本发明各实施例中的 NDPA帧属于 AP以广播方式发 送的单用户模式下的帧。 在 BSS中， 为了保证 AP能够正确地与多个 STA 进行通信， 对 STA 进行了分组管理， 每个分组都有唯一的分组标识 ( GROUP_ID ) 。 每个 STA知道其所属的分组， 且在本地存储有所属分组 的 GROUP—ID。
当 AP通过信道接入过程竟争到 TXOP时， AP在 TXOP持续时间内向
STA发送数据帧。 当采用多用户模式发送的时候， AP在发送给 STA的数据 帧中携带 GROUP_ID , 而 STA 接收到数据帧时， 通过比较数据帧中的 GROUPJD与本地存储的 GROUP_ID来判断该数据帧是否是发送给自己所 在分组的。 如果本地存储的 GROUPJD与数据帧中的 GROUPJD不同， 确 定数据帧不是发送给自己所在分组的。 如果本地存储的 GROUPJD与数据 帧中的 GROUPJD相同，进一步判断数据帧中的 NUM_STS是否为 0;如果 判断结果为大于 0, 表明该数据帧中包含发送给自己的数据； 如果判断结果 为 0, 表明该数据帧中没有发送给自己的数据。 NUM_STS用于标识分组中 的某个 STA的空时流数目。
当采用单用户模式发送的时候， AP 发送给 STA 的数据帧中携带
PARTIAL_AID , 而 STA 接收到数据帧时， 通过比较数据帧中的 PARTIAL_AID与自身的 PARTIAL_AID来判断该数据帧是否是发送给自己 的。 如果自身的 PARTI AL_AID与数据帧中的 PARTIAL— AID不同， 确定数 据帧不是发送给自 己的。 如果自身的 PARTIAL_AID 与数据帧中的 PARTIAL_AID相同， 进一步根据介质访问控制 （ Medium Access Control; 筒称为： MAC )帧头中的信息（例如接收端 MAC地址）判断该数据是否发 送给自己的。
在实际应用过程中， AP除了向 STA发送数据帧之外，有时需要 STA反 馈 CSI信息。 当在 TXOP持续时间内 AP需要多个 STA返回 CSI时， AP 将 NDPA帧中的发送参数向量（ TXVECTOR ) 中的 GROUP_ID设为 63, 将 PARTIAL_AID设为 0。 GROUP_ID设为 63, PARTIAL_AID设为 0代 表当前帧是一个广播帧， 所有的 STA都需要接收。 但实际上 AP并不需要 所有 STA反馈 CSI信息， AP将其要求反馈 CSI信息的每个 STA的 AID分 别设置在 NDPA帧的 STA信息域中， STA信息域的数目等于需要反馈 CSI 的 STA的数目。
其中， 本实施例中 NDPA帧被解析到 MAC层时的部分结构， 如图 1B 所示。如图 1B所示， NDPA帧中携带的 MAC层信息主要包括：帧控制（Frame Control )、持续时长（ Duration )、发送端 MAC地址（即 AP的 MAC地址）、 接收端 MAC地址（即广播域对应的 MAC地址， 通常是预先设定好的）、 探通序列 （Sounding Sequence ), 一个或多个 STA信息域和帧校验字段 ( FCS )。 其中， 帧控制字段中包含当前帧的类型等信息， 当前帧是否为 NDPA帧可以通过帧控制字段进行判断。 STA信息域用于存储 AP要求返回 CSI信息的 STA的 AID。 如图 1B所示， 当 AP要求多个 STA返回 CSI信 息时， NDPA帧中包括多个 STA信息域。 其中， 每个 STA信息域的结构如 图 1C所示， 包括 STA的 AID字段、 返回类型 （Feedback Type )字段和列 数指示 （Nc Index )字段。
基于上述， STA在接收到 AP发送的帧后， 首先对当前接收到的帧进行 物理层解析； 当根据物理层帧头中的信息识别出当前接收到的帧为广播帧 时， 进一步对该当前接收到的帧进行 MAC层解析； 获取 MAC层帧头中的 帧控制字段， 根据帧控制字段中的帧类别标识， 判断该当前接收到的帧是 否为 NDPA帧。 其中， 不同类型的帧对应的帧类别标识的值不同。 在本实 施例中， STA根据帧类别标识的值确定该当前帧为 NDPA帧， 并从 NDPA 帧中获取多个 STA信息域， 然后再对多个 STA信息域进行解析， 获取其中 的 STAAID。
步骤 102、 STA将自身的 STA AID与获取的 STA AID进行比较， 判断 自身的 STA AID是否与获取的 STA AID相同；如果判断结果为是，即 NDPA 帧的 STA信息域中包括 STA自身的 STA AID, 执行步骤 103; 如果判断结 果为否， 即 NDPA帧的 STA信息域中不包括 STA自身的 STA AID,执行步 骤 104。
当 STA获取到 NDPA帧中携带的 STAAID后，将自身的 STA AID与获 取的 STA AID进行比较，判断自身的 STA AID是否与获取的 STA AID相同， 亦即判断 STA本身是否属于 AP要求返回 CSI信息的 STA。 如果 STA自身 的 STA AID与获取的 STA AID相同，说明该 STA是 AP要求返回 CSI信息 的 STA。 如果 STA自身的 STA AID与获取的 STA AID不同， 说明该 STA 不是 AP要求返回 CSI信息的 STA,或者说 AP未要求该 STA返回 CSI信息。
其中， 如果 NDPA帧中携带有多个 STA信息域时， STA需要将本身的 STA AID与 NDPA帧中的每个 STA信息域中的 STA AID进行比较，以判断 本身是否属于 AP要求返回 CSI信息的 STA。
步骤 103、 向 AP返回 CSI信息。
其中， 当 AP要求本 STA返回 CSI信息时， STA必须处于 Awake状态， 即处于完全供电状态， 以向 AP返回 CSI信息。 当 STA向 AP返回 CSI信息 后， 可以结束此次针对通过允许进入睡眠模式以节省功耗的操作。
但是,在此次判断之后,即使自身的 STA AID与获取的 STA AID相同的 STA,后续也可能满足其他允许进入睡眠的条件而进入允许睡眠状态。 进一 步， 对于 STA信息域中第一个 STA之外的 STA需要通过由 AP发送的波束 成型报告轮询 ( Beamforming Report Poll ) 帧来获取该 STA的 CSI反馈。 Beamforaiing Report Poll帧通常采用单用户的模式发送，如果采用 VHT的物 理层格式发送，会由于 PARTIAL_AID参数与 STA信息域列表中第一个 STA 之外的 STA的 PARTIAL_AID不匹配， 从而引起 STA信息域列表中第一个 STA之外的 STA错误地进入 Doze状态。
为了避免目标 STA之外的 STA错误地进入 Doze状态，可以采取以下多 种之一的措施：
第一种方法，当 STA判定自身的 AID与 NDPA帧的 STA信息域中 AID 相符合之后， 该 STA在当前 TXOP内都不再允许进入 Doze状态。
或者，第二种方法， 当 STA判定自身的 AID与 NDPA帧的 STA信息域 中 AID相符合之后， 如果收到 Beamforming Report Poll帧， 即使 STA发现 其（该 STA )不是此 Beamforming Report Poll帧的目标地址（即 Beamforming Report Poll帧中的 PARTIAL_AID参数与该 STA的 PARTIAL_AID参数不匹 配 )也不允许进入 Doze状态。
或者，第三种方法， 当 STA判定自身的 AID与 NDPA帧的 STA信息域 中 AID相符合之后， 在收到 AP发送的 Beamforming Report Poll帧之前， 即 使该 STA发现自身不是此 Beamforming Report Poll 帧的目标地址 （即 Beamforaiing Report Poll帧中的 PARTIAL_AID参数与自己的 PARTI AL_AID 参数不匹配 )也不允许进入 Doze状态。
或者， 第四种方法， 当 Beamforming Report Poll帧被使用 VHT格式物 理层发送的时， 将 TXOP_PS_NOT_ALLOWED参数设为 1。
或者， 第五种方法， 使用传统的（legacy )物理层格式发送 Beamforming Report Poll帧。
步骤 104、 允许进入 Doze状态。
其中， 当 AP未要求本 STA返回 CSI信息时， STA不需要向 AP返回 CSI信息， 在该条件下 STA也就不需要处于完全供电状态， 故 STA可以进 入 Doze状态。但是，对于一个 STA而言，制约其供电状态的因素还有很多， 例如： 如果此时 STA有数据等待发送， 它可能会选择不进入 Doze状态以便 当前 TXOP出现截断等情况时可以增加其竟争到信道的机会。故在本实施例 中，当 STA判断出其在不需要反馈 CSI信息的条件下允许进入 Doze状态时， 进一步对其它进入条件进行判断， 当其它进入条件也满足时， 进入 Doze状 态， 并且直到当前 TXOP结束再醒来。 如果没有其他进入条件时， STA可直 接进入 Doze状态。
本实施例的节省功耗的方法， STA通过对接收到的帧进行类型识别， 在 识别出接收到的帧为 NDPA帧时，通过将自身的 STA AID与 NDPA帧的 STA AID进行比较判断本身是否需要反馈 CSI信息，并确定不需要反馈 CSI信息， 允许进入 Doze状态， 降低了功耗， 节约了资源。
图 2为本发明另一实施例提供的节省功耗的方法的流程图。如图 2所示， 本实施例的方法包括：
步骤 201、 STA接收 AP发送的帧。
当 AP获取到 TXOP后， 在 TXOP持续时间内， 可以向 STA发送各种 类型的帧， 例如控制帧、 数据帧等。 STA接收 AP发送的帧。
步骤 202、 STA对接收到的帧进行物理层解析， 从物理层头部信息中获 取允许 TXOP省电的指令。
STA接收到 AP发送的帧时， 首先对接收到的帧进行物理层解析， 获取 携带在物理层头部中的物理层相关信息。 其中， 在物理层头部中包含当前帧 是否为广播帧的信息， 故 STA可以根据物理层头部信息确定接收到的帧是 否为广播帧信息。在本实施例中， STA根据物理层头部信息确定接收到的帧 为广播帧。
另外， 在 TXOP期间， 只有在 AP允许其所在 BSS内的 STA进入 Doze 状态的条件下， STA才可以进入 Doze状态。 AP通过发送给 STA的帧的物 理层头部中的某个比特来指示是否允许其所在 BSS内的 STA进行 TXOP省 电。 优选的， AP 使用物理层头部中非常高吞吐量 -信息 -A1 ( Very High Throughput-SIGNAL-Al； 筒称为： VHT-SIG-A1 )字段中携带不允许传输机 会省电 （Transmit Opportunity_Power Save_NOT_ ALLOWED； 筒称为： TXOP_PS_NOT_ALLOWED )这一参数的比特来标识是否允许 TX0P省电 的指令。其中， TXOP_PS_NOT_ALLOWED设为 0,表示允许 STA进行 TXOP 省电， 此时 STA才有机会进入 Doze状态， 即为允许 TXOP省电的指令； TXOP_PS_NOT_ALLOWED设为 1 , 表示不允许 STA进行 TXOP省电， 即 STA不能进入 Doze状态， 即为不允许 TXOP省电的指令。 在本实施例中， 电 的 指 令 的 信 息 ， 该 信 息 通 过 物 理 层 头 部 中 的 携 带 TXOP_PS_NOT_ALLOWED这一参数的比特的值来表示。 STA从物理层头 部中获取到标识 TXOP_PS_NOT_ALLOWED这一参数的比特的值， 该比特 的值为 0, 即获取到允许 TXOP省电的指令。
步骤 203、 STA对接收到的帧进行 MAC层解析， 根据 MAC层帧头中 的帧类别标识确定接收到的帧为 NDPA帧， 并从 NDPA帧中的 STA信息域 中获取 STA AID。
具体的， 当 STA判断出接收到的帧为广播帧时， 对 NDPA帧做进一步 解析处理， 即 MAC层解析， 获取该帧中携带的 MAC层信息。 STA根据 MAC 帧头中的帧控制字段中携带有当前帧的帧类型标识符， 从中可以辨识 出当前接收到的帧为 NDPA帧， 并获取 NDPA帧中的 STA信息域， 对 STA 信息域做进一步解析获取 STA AID。
步骤 204、 STA将自身的 STA AID与从 NDPA帧中的 STA信息域中获 取的 STA AID进行比较，判断自身的 STA AID是否与获取的 STA AID相同； 如果判断结果为是， 执行步骤 205; 如果判断结果为否， 执行步骤 206。
步骤 205、 向 AP返回 CSI信息。 此时可以结束此次针对通过允许进入 睡眠模式以节省功耗的操作。 但是,在此次判断之后,即使自身的 STA AID与 获取的 STA AID相同的 STA,后续也可能满足其他允许进入睡眠的条件而进 入允许睡眠状态。 对于后续的操作可以继续应用步骤 103中介绍的方法。
步骤 206、 允许进入 Doze状态。 其中， 步骤 204-步骤 206可详见上述步骤 102-步骤 104的描述， 在此不 再赘述。
本实施例的节省功耗的方法， STA通过对接收到的帧进行物理层解析， 从 NDPA帧中获取 AP允许 STA进入 Doze状态的指令， 为后续 STA确定 是否允许进入 Doze状态打下了基础。 进一步， 在本实施例中， 当 STA获知 AP不允许 STA进入 Doze状态时， 可以直接结束操作， 节约功耗。
图 3为本发明又一实施例提供的节省功耗的方法的流程图。本实施例基 于图 2所示实施例实现，如图 3所示，本实施例的方法在步骤 201之前包括： 步骤 200、 STA接收当前帧的前一帧， 并对当前帧的前一帧进行物理层 解析， 获取不允许 TXOP省电的指令。
具体的， 如果当前帧不是当前 TXOP期间的第一个 VHT格式帧， STA 在接收当前帧（即 NDPA帧 )之前， 会接收 AP发送的其他 VHT格式的帧， 在其他 VTH格式的帧中也携带有 AP是否允许 STA进行 TXOP省电的指令 (即是否允许 STA进入 Doze状态的指令）。 由于， 在一个 TXOP期间， 一 到 TXOP结束，故在本实施例中， STA需要根据当前帧的前一帧中物理层头 部信息确定 AP不允许 STA进入 Doze状态， 而根据当前帧的物理层头部信 息确定 AP允许 STA进入 Doze状态。
具体的， STA在接收到 AP发送的每个帧时， 都需要对接收到的帧进行 物理层解析， 并根据物理层头部中的 TXOP_PS_NOT_ALLOWED参数判断
AP是否允许 STA进行 TXOP省电。
在本实施例中， 所述 NDPA帧或者 TXOP期间的其他帧可以为 VHT格 式的帧。另外，在 本发明其他各实施例中，所述 TXOP期间的帧或者 NDPA 帧也可以为 VHT格式的帧。
本实施例的节省功耗的方法， STA根据当前帧 （即 NDPA帧 ) 的前一 帧确定当前时刻之前 AP不允许 STA进行 TXOP省电， 即不允许 STA进入 Doze状态， 而根据当前帧确定当前时刻 ΑΡ允许 STA进行 TXOP省电， 在 该条件下再执行后续判断是否允许进入 Doze状态的操作，为进入 Doze状态 节约功耗打下了基础。
举例说明： 如果在一个 TXOP期间， AP向一些 STA发送完数据帧后， 又要求其中一些 STA反馈 CSI信息， 由于一些 STA需要接收数据帧， 故 VHT TXOP省电模式就不能应用于整个 TXOP期间。 假设一 BSS中至少包 括 4个 STA和一个 AP, 在 TXOP开始， AP向第一个 STA和第二个 STA 发送数据帧， 故在这段时间内， AP 通过将所发送的数据帧中的 TXOP_PS_NOT_ALLOWED参数设为 1 , 表示不允许 STA进入 Doze状态， 所有 STA均处 Awake状态。 之后， AP又要求第三个 STA和第四个 STA反 馈 CSI 信息， 则在 AP 发送 NDPA 帧时， AP 将 NDPA 帧中的 TXOP_PS_NOT_ALLOWED参数设为 0,表示允许 ST A进入 Doze状态。 由 于 NDPA帧是以广播形式发送的，故所有 STA均会接收到。对于 STA而言， 根据 NDPA帧的前一个数据帧中的 TXOP_PS_NOT_ALLOWED参数， 获知 当时 AP 不允许 STA 进入 Doze 状态， 而根据 NDPA 帧中的 TXOP_PS_NOT_ALLOWED参数获知此时 AP允许 STA进入 Doze状态，在 该条件下， 那些 AP未要求反馈 CSI信息的 STA就可以根据图 1A、 图 2或 图 3所示的方法， 确定自己可以进入 Doze状态， 并在满足进入条件时进入 Doze状态， 以降低功耗， 节约资源。
基于上述各实施例， STA还会定时接收 AP发送的信标帧， 在该信标帧 中包含允许 STA所在 BSS进行 TXOP省电的指令； STA获取信标帧中包含 的允许 STA所在 BSS进行 TXOP省电的指令。 具体的， AP通过信标帧中 携带非常高吞吐量传输机会省电（ Very High Throughput Transmit Opportunity Power Save; 筒称为： VHT TXOP PS )这一参数的比特来表示是否允许基本 服务集进行 TXOP省电的指令。其中，将 VHT TXOP PS设为 1表示允许 STA 所在基本服务集进行 TXOP省电的指令， VHT TXOP PS设为 0表示不允许 STA所在基本服务集进行 TXOP省电的指令。 AP通过广播该信标帧通告该 BSS是否具有 TXOP省电的能力， 只有在该 BSS具有 TXOP省电的能力的 条件下， AP才能向 STA发送是否允许 STA进行 TXOP省电的指令以及后 续操作。 故 AP通过信标帧向 STA发送包含允许 STA所在 BSS进行 TXOP 省电的指令为前述各实施例提供了条件。
在此对本发明上述各实施例的目的做进一步说明， 本发明上述各实施例 为 STA提供了一种新的判断是否允许进入 Doze状态的方法， 为 STA进入 Doze状态提供了依据， 为 STA进入 Doze状态来节约功耗打下了基础。
下面结合现有 STA判断是否可以进入 Doze状态的条件，对本发明上述 各实施例的具体实施过程做进一步说明。
AP竟争到 TXOP时， 会向 STA发送各种类型的帧， 例如： 控制帧、 数 据帧、 广播帧 （NDPA帧）等。 但是， 在 TXOP期间并不是所有的 STA都 有数据帧接收,对于没有数据帧接收的 STA可以进入 Doze状态以节约功耗。 STA要进入 Doze状态需要以下几个前提条件：第一、 AP允许 BSS进行 TXOP 省电模式； 第二、 AP允许 STA进入 Doze状态， 第三、 STA本身支持 TXOP 省电模式； 只有在以上几个前提条件满足的情况下， STA才能进一步判断是 否可以进入 Doze状态。 故在本实施例中， 首先假设上述几个前提条件已满 足， 则 STA判断是否可以进入 Doze状态包括：
STA接收到 AP发送的帧， 对接收到的帧进行物理层解析， 获取物理层 头部信息， 进一步对接收到的帧进行 MAC层解析， 获取 MAC层帧头信息。 要包括： （ 1 ) STA 根据数据帧中的接收向量参数（ RXVECTOR ) 中的 GROUPJD, 确定本地 STA不是数据帧对应的分组中的一员。 （2 ) STA根 据数据帧中的接收向量参数 ( RXVECTOR ) 中的 STA 部分标识 ( PARTIAL_AID ), 或者根据数据帧中的接收向量参数 ( RXVECTOR )中的 STA部分标识（ PARTIAL_AID )和 MAC层的 STA AID, 确定该数据帧不是 发送给本地 STA的。 （ 3 ) STA根据数据帧中的接收向量参数 ( RXVECTOR ) 中的 GROUP_ID, 确定本地 STA是数据帧对应的分组中的一员， 但是根据 接收向量参数 ( RXVECTOR ) 中的 NUM_SYS确定该数据帧不是发送给本 地 STA的。 （ 4 ) STA发送一个确定信号来响应接收到的 More Data域为 0 的数据帧。 （ 5 ) STA发现 NDPA帧中的 STA信息域中的 STA AID与自身 的 STA AID不相同。
具体的， 针对第一个条件， STA的操作流程可以为： STA首先获取物理 层头部信息， 此处主要是指接收向量参数（RXVECTOR )中的 GROUP_ID; 然后 STA将接收向量参数 ( RXVECTOR ) 中的 GROUP_ID与 STA本地存 储的 GROUP_ID进行比较； 如果比较结果为两者相同， 则 STA确定其属于 数据帧对应的分组； 如果比较结果为两者不同， 则 STA确定其不属于数据 帧对应的分组。 数据帧对应的分组是指数据帧中的 GROUP_ID标识的分组。 当 STA确定其属于数据帧对应的分组时， 表明 AP正向该分组发送数据帧， STA作为其中的一员不能进入 Doze状态； 当 STA确定其不属于数据帧对应 的分组时， 表明当前 AP并未向 STA所在分组发送数据帧， STA进入 Doze 状态， 以节约功耗。
针对第二个条件， STA的操作流程可以为： STA首先获取数据帧中携带 的物理层头部信息， 此处主要是指接收向量参数（RXVECTOR ) 中的 STA 部分标识（ PARTIAL_AID )； 然后 STA将接收向量参数 ( RXVECTOR ) 中 的 STA部分标识（ PARTIAL_AID )与本地 STA部分标识（ PARTIAL_AID ) 进行比较。 如果比较结果为两个 STA部分标识相同， 则说明该数据帧有可 能是发送给 STA的， 故 STA进一步进行判断， 获取数据帧中 MAC层信息， 此处主要是指 MAC地址； 然后， STA将获取的 MAC地址和本身的 MAC 地址进行比较； 如果比较结果为两个 MAC地址相同， 则确定该数据帧是发 送给自己的， 当前 STA有数据帧接收， 故不能进入 Doze状态。 如果比较结 果为两个 STA部分标识（ PARTIAL_AID )不相同， 则 STA可以直接确定该 数据帧不是发送给自己的， 故 STA可以进入 Doze状态， 以节约功耗。
针对第三个条件， STA的操作流程可以为： STA首先获取数据帧中携带 的物理层头部信息， 此处主要是指接收向量参数 （ RXVECTOR ) 中的 GROUPJD; 然后 STA将接收向量参数 ( RXVECTOR )中的 GROUP_ID与 本地存储的 GROUPJD进行比较； 如果比较结果为两者相同， 则 STA确定 其属于数据帧对应的分组； 如果比较结果为两者不同， 则 STA确定其不属 于数据帧对应的分组。 数据帧对应的分组是指数据帧中的 GROUPJD标识 的分组。 当 STA确定其属于数据帧对应的分组时， 表明 AP正向 STA所在 分组发送数据帧； 进一步， STA 获取接收向量参数（RXVECTOR ) 中的 NUM_STS, 该 NUM_STS 表示 AP 向该 STA发送的空时流的数目； 当 NUM_STS不为 0时表明 AP正向该 STA发送数据分组， STA不能进入 Doze 状态； 当 NUM_STS为 0时表明 AP并未向该 STA发送数据帧， 故 STA进 入 Doze状态， 以节约功耗。 当 STA确定其不属于数据帧对应的分组时， 表 明当前 AP并未向其所属分组发送数据帧， STA可以进入 Doze状态， 以节 约功耗， 该场景即为第一个条件。
针对第四个条件， STA 的操作流程可以为： STA 首先获取数据帧中的 More Data域， 判断该 More Data域是否为 0; 其中， More Data域表示该数 据帧是否为 AP在 TXOP期间发送的最后一个数据帧。 STA发送确认帧来响 应收到的 More Data域为 0的数据帧之后就可以进入 Doze状态， 以节约功 耗。
针对第五个条件， STA的操作流程可以为： STA获取 MAC层帧头信 息，首先是帧类型标识，确定该帧为 NDPA帧，然后获取 NDPA帧中的 STA AID, 确定 NDPA帧中的 STA AID与本身的 STA AID不同， 表明 AP未要 求其返回 CSI信息， 故可以进入 Doze状态， 以节约功耗。
通过上述操作， 当 STA判断出其可以进入 Doze状态并在其他进入条件 也满足的情况下， STA即可进入 Doze状态， 直到 TXOP结束再醒来。 进一 步说明， 在实际应用中， STA在判断是否可以进入 Doze状态仅是依据上述 五个条件来判断， 但并不限定上述五个条件的先后顺序。 其中， STA只要满 足上述五个条件中的一个条件， 就可以进入 Doze状态。
本发明上述各实施例的节省功耗的方法， 在 AP要求多个 STA返回 CSI 信息场景下， STA通过识别出 NDPA帧， 并将 NDPA帧中携带的 STA AID 与本身的 STA AID进行比较， 判断本身是否需要返回 CSI信息， 在确定不 需要返回 CSI信息时， 进入 Doze状态， 节约了功耗。
图 4为本发明一实施例提供的站点设备的结构示意图。本发明实施例的 站点设备可以是无线局域网中的站点 STA或者接入点 AP。 特别的， 该站点 设备可以是能够进行多用户传输的 STA或者 A P , 并且能够进入省电模式。 如图 4所示， 本实施例的站点设备 40包括： 第一获取模块 41、 判断模块 42 和进入模块 43。
其中， 第一获取模块 41 , 用于根据接收到的帧中的帧类别标识， 确定接 收到的帧为 NDPA帧， 并获取 NDPA帧中 STA信息域中的 STA AID。 判断 模块 42, 与第一获取模块 41连接， 用于将站点设备自身的 STA AID与获取 的 STA AID进行比较， 判断站点设备自身的 STA AID是否与获取的 STA AID相同。 进入模块 43, 与判断模块 42连接， 用于在判断模块 42的判断结 果为否时， 允许进入睡眠状态。
本实施例的站点设备可以为 STA,其上述各功能模块可用于执行图 1所 示节省功耗的方法的流程， 其具体工作原理不再赘述， 详见方法实施例的描 述。
本实施例的站点设备，在 AP要求多个 STA返回 CSI信息场景下，通过 识别出 NDPA帧，并将 NDPA帧中携带的 STA AID与本身的 STA AID进行 比较， 判断本身是否需要返回 CSI信息， 在确定不需要返回 CSI信息时， 允 许进入 Doze状态， 在其他进入条件满足时进入 Doze状态， 节约了功耗。
图 5为本发明另一实施例的站点设备的结构示意图。 本实施例基于图 4 所示实施例实现， 如图 5所示， 本实施例的站点设备 50的第一获取模块 41 包括： 接收单元 411、 解析单元 412和获取单元 413。
具体的， 接收单元 411 , 用于接收 AP发送的帧。 解析单元 412, 与接收 单元 411连接， 用于对接收单元 411接收到的帧进行 MAC层解析。 获取单 元 413, 与解析单元 412连接， 用于根据 MAC层帧头中帧类别标识的值， 确定接收到的帧为 NDPA帧，并从 NDPA帧中的 STA信息中获取 STA AID。
第一获耳 ^莫块 41的各功能单元可用于执行图 1所示实施例中步骤 101 所示的流程， 其具体工作原理不再赘述， 详见方法实施例的描述。
进一步， 本实施例的站点设备还包括： 第二获取模块 51。 第二获取模块 51 , 用于在第一获取模块 41根据接收到的帧中的帧类别标识， 确定接收到 的帧为 NDPA帧， 并获取 NDPA帧中的 STA AID之前， 对接收单元 411接 收到的帧进行物理层解析， 获取允许 TXOP省电的指令， 为第一获取模块 41 打下基础。 第二获取模块 51 具体用于获取 VHT-SIG-AI 中标识不允许 TXOP省电 （即 TXOP_PS_NOT_ALLOWED ) 的比特的值， 其中该比特的 值为 0。
上述第二获取模块 51具体可用于执行图 2所示节省功耗的方法的流程， 其具体工作原理不再赘述， 详见方法实施例的描述。
再进一步， 本实施例的站点设备还包括： 第三获取模块 52。 第三获取模 块 52, 用于在当前帧不是当前 TXOP的第一帧时， 对当前帧的前一帧进行 物理层解析， 获取不允许 TXOP省电的指令， 为后续各功能模块或单元执行 相应操作打下基础。 第三获取模块 52具体用于获取 VHT-SIG-AI中标识不 允许 TXOP省电 （即 TXOP_PS_NOT_ALLOWED ) 的比特的值， 其中， 该 比特的值为 1。
上述第三获取模块 52具体可用于执行图 3所示节省功耗的方法的流程， 其具体工作原理不再赘述， 详见方法实施例的描述。
更进一步， 本实施例的站点设备还包括： 接收模块 53。 接收模块 53, 用于接收 AP定时发送的信标帧， 并获取该信标帧中包含的允许站点设备所 在 BSS进行 TXOP省电的指令， 为站点设备的上述各功能模块或单元执行 相应操作打下基础。 接收模块 53具体用于获取信标帧中标识非常高吞吐量 传输机会省电 （即 VHT TXOP PS ) 的比特的值， 其中， 该比特的值为 1。
本实施例的站点设备， 通过上述第二获取模块、 第三获取模块和接收模 块功能模块分别确定站点设备进入 Doze状态所需的各种前提条件， 为第一 获取模块、 判断模块和进入模块在 AP要求多个站点设备返回 CSI信息的条 件下， 执行站点设备是否可以进入 Doze状态的操作打下了基础， 为站点设 备在满足条件时进入 Doze状态以降低功耗提供了保障。 本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分步骤 可以通过程序指令相关的硬件来完成， 前述的程序可以存储于一计算机可读 取存储介质中， 该程序在执行时， 执行包括上述方法实施例的步骤； 而前述 的存储介质包括： ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的 介质。

Claims

权利要求
1、 一种节省功耗的方法， 其特征在于， 包括：
站点 STA根据接收到的帧中的帧类别标识， 确定所述帧为空数据包通 告 NDPA帧，并获取所述 NDPA帧中 STA信息域中的 STA关联标识符 AID; 所述 STA将自身的 STA AID与所述获取的 STA AID进行比较，判断自 身的 STA AID是否与所述获取的 STA AID相同；
当所述 STA判断出自身的 STA AID与所述获取的 STA AID不相同时， 允许进入睡眠状态。
2、 根据权利要求 1所述的节省功耗的方法， 其特征在于， 所述 STA根 据接收到的帧中的帧类别标识，确定所述帧为 NDPA帧， 并获取所述 NDPA 帧中 STA信息域中的 STA AID包括：
所述 STA接收所述帧；
所述 STA对所述帧进行介质访问控制 MAC层解析；
所述 STA根据 MAC 层帧头中帧类别标识的值， 确定所述帧为所述 NDPA帧， 并从所述 NDPA帧中的 STA信息域中获取所述 STA AID。
3、根据权利要求 1或 2所述的节省功耗的方法，其特征在于，所述 STA 根据接收到的帧中的帧类别标识， 确定所述帧为 NDPA 帧， 并获取所述 NDPA帧中 STA信息域中的 STA AID之前包括：
所述 STA对所述帧进行物理层解析， 获取允许传输机会 TXOP省电的 指令。
4、 根据权利要求 3所述的节省功耗的方法， 其特征在于， 所述获取允 许传输机会 TXOP省电的指令包括：
所述 STA获取非常高吞吐量 -信息 -A1 VHT-SIG-A1标识不允许 TXOP省 电 TXOP_PS_NOT_ALLOWED的比特的值， 所述比特的值为 0。
5、 根据权利要求 3所述的节省功耗的方法， 其特征在于， 所述 STA对 所述帧进行物理层解析， 获取允许传输机会 TXOP省电的指令之前包括： 当所述帧不是当前 TXOP的第一个非常高吞吐量 VHT格式的帧时， 所 述 STA对所述帧的前一个 VHT格式的帧进行物理层解析，获取不允许 TXOP 省电的指令。
6、 根据权利要求 5所述的节省功耗的方法， 其特征在于， 所述获取不 允许 TXOP省电的指令具体为：
所述 STA获取非常高吞吐量 -信息 -A1VHT-SIG-AI中标识不允许 TXOP 省电 TXOP_PS_NOT_ALLOWED的比特的值， 所述比特的值为 1。
7、 根据权利要求 1或 2或 4或 5或 6所述的节省功耗的方法， 其特征 在于， 还包括：
所述 STA接收接入点 AP发送的信标帧，获取所述信标帧中包含的允许 所述 STA所在基本服务集进行传输机会 TXOP省电的指令。
8、 根据权利要求 7所述的节省功耗的方法， 其特征在于， 所述获取所 述信标帧中包含的允许所述 STA所在基本服务集进行传输机会 TXOP省电 的指令具体为：
所述 STA 获取所述信标帧中标识非常高吞吐量传输机会省电 VHT
TXOP PS的比特的值， 所述比特的值为 1。
9、 一种站点设备， 其特征在于， 包括：
第一获耳 ^莫块， 用于根据接收到的帧中的帧类别标识， 确定所述帧为空 数据包通告 NDPA帧，并获取所述 NDPA帧中 STA信息域中的站点 STA关 联标识符 AID;
判断模块，用于将所述站点设备自身的 STA AID与所述获取的 STA AID 进行比较， 判断所述站点设备自身的 STA AID是否与所述获取的 STA AID 相同；
进入模块，用于在所述判断模块的判断结果为否时，允许进入睡眠状态。
10、 根据权利要求 9所述的站点设备， 其特征在于， 所述第一获取模块 包括： 接收单元， 用于接收所述帧；
解析单元， 用于对所述帧进行介质访问控制 MAC层解析；
获取单元， 用于根据 MAC层帧头中帧类别标识的值， 确定所述帧为所 述 NDPA帧， 并从所述 NDPA帧中的 STA信息域中获取所述 STA AID。
11、 根据权利要求 9或 10所述的站点设备， 其特征在于， 还包括： 第二获取模块，用于对所述帧进行物理层解析，获取允许传输机会 TXOP 省电的指令。
12、 根据权利要求 11所述的站点设备， 其特征在于， 所述第二获取模 块具体用于获取非常高吞吐量 -信息 -A1VHT-SIG-AI中标识不允许 TXOP省 电 TXOP_PS_NOT_ALLOWED的比特的值， 所述比特的值为 0。
13、 根据权利要求 11所述的站点设备， 其特征在于， 还包括： 第三获取模块， 用于在所述帧不是当前 TXOP 的第一个非常高吞吐量 VHT格式的帧时， 对所述帧的前一个 VHT格式的帧进行物理层解析， 获取 不允许 TXOP省电的指令。
14、 根据权利要求 13所述的站点设备， 其特征在于， 所述第三获取模 块具体用于获取非常高吞吐量 -信息 -A1VHT-SIG-AI中标识不允许 TXOP省 电 TXOP_PS_NOT_ALLOWED的比特的值， 所述比特的值为 1。
15、 根据权利要求 9或 10或 12或 13或 14所述的站点设备， 其特征在 于， 还包括：
接收模块， 用于接收接入点 AP发送的信标帧， 并获取所述信标帧中包 含的允许所述站点设备所在基本服务集进行传输机会 TXOP省电的指令。
16、 根据权利要求 15所述的站点设备， 其特征在于， 所述接收模块具 体用于获取所述信标帧中标识非常高吞吐量传输机会省电 VHT TXOP PS的 比特的值， 所述比特的值为 1。
PCT/CN2012/072886 2011-06-24 2012-03-23 节省功耗的方法及站点设备 WO2012163147A1 (zh)

Priority Applications (10)

Application Number Priority Date Filing Date Title
AU2012265526A AU2012265526B2 (en) 2011-06-24 2012-03-23 Method and station device for saving power consumption
EP18156613.4A EP3393177B1 (en) 2011-06-24 2012-03-23 Power save method and station device
RU2014102180/07A RU2565049C2 (ru) 2011-06-24 2012-03-23 Способ энергосбережения и устройство станции
KR1020137033444A KR101593290B1 (ko) 2011-06-24 2012-03-23 전력 소비를 절약하기 위한 방법 및 스테이션 디바이스
EP12792370.4A EP2706792B1 (en) 2011-06-24 2012-03-23 Method and station device for saving power consumption
KR1020167002485A KR101675724B1 (ko) 2011-06-24 2012-03-23 전력 소비를 절약하기 위한 방법 및 스테이션 디바이스
BR112013032926-2A BR112013032926B1 (pt) 2011-06-24 2012-03-23 Método para economizar potência e dispositivo de estação
ES12792370.4T ES2675502T3 (es) 2011-06-24 2012-03-23 Método y dispositivo de estación para ahorro de consumo de energía
US14/138,570 US9743355B2 (en) 2011-06-24 2013-12-23 Power save method and station device
US15/656,889 US10206172B2 (en) 2011-06-24 2017-07-21 Power save method and station device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201110173688 2011-06-24
CN201110173688.X 2011-06-24
CN201110273700.4 2011-09-15
CN201110273700.4A CN102843755B (zh) 2011-06-24 2011-09-15 节省功耗的方法及站点设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/138,570 Continuation US9743355B2 (en) 2011-06-24 2013-12-23 Power save method and station device

Publications (1)

Publication Number Publication Date
WO2012163147A1 true WO2012163147A1 (zh) 2012-12-06

Family

ID=47258354

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/072886 WO2012163147A1 (zh) 2011-06-24 2012-03-23 节省功耗的方法及站点设备

Country Status (9)

Country Link
US (2) US9743355B2 (zh)
EP (2) EP2706792B1 (zh)
KR (2) KR101593290B1 (zh)
CN (2) CN102843755B (zh)
AU (1) AU2012265526B2 (zh)
BR (1) BR112013032926B1 (zh)
ES (1) ES2675502T3 (zh)
RU (2) RU2565049C2 (zh)
WO (1) WO2012163147A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9935802B2 (en) 2013-04-19 2018-04-03 Lg Electronics Inc. Method for transmitting signal field and apparatus therefor

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103002550B (zh) * 2011-09-16 2017-09-08 华为技术有限公司 一种控制站点进行睡眠状态的方法及站点
CN103378920B (zh) * 2012-04-16 2016-11-16 华为终端有限公司 网络发现方法、接入点及终端设备
US9572105B2 (en) 2014-06-20 2017-02-14 Apple Inc. WLAN system with opportunistic transitioning to a low power state for power management
CN107211452A (zh) 2015-01-09 2017-09-26 交互数字专利控股公司 用于支持无线局域网(wlan)系统的多用户传输的方法、装置和系统
CN105468823B (zh) 2015-11-16 2019-01-25 广州广电运通金融电子股份有限公司 一种自助设备节能控制方法和装置
US10104635B2 (en) * 2016-02-28 2018-10-16 Qualcomm Incorporated Unicast and broadcast protocol for wireless local area network ranging and direction finding
US11131743B2 (en) 2016-02-28 2021-09-28 Qualcomm Incorporated Unicast and broadcast protocol for wireless local area network ranging and direction finding
CN117879659A (zh) 2016-05-10 2024-04-12 华为技术有限公司 无线帧的发送与接收方法与装置
WO2018048487A1 (en) * 2016-09-06 2018-03-15 Laurent Cariou Power save announcement frame for opportunistic power save (ops)
CN109729571A (zh) * 2017-10-31 2019-05-07 展讯通信（上海）有限公司 接入点设备及其模式切换的方法、计算机可读介质
CN109729570A (zh) * 2017-10-31 2019-05-07 展讯通信（上海）有限公司 Wlan设备及其模式切换的方法、可读介质
WO2023087319A1 (zh) * 2021-11-22 2023-05-25 北京小米移动软件有限公司 通信方法及装置、电子设备及存储介质

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102076067A (zh) * 2010-12-23 2011-05-25 北京星网锐捷网络技术有限公司 无线站点的休眠方法、装置和设备及通信系统

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5566357A (en) * 1994-10-06 1996-10-15 Qualcomm Incorporated Power reduction in a cellular radiotelephone
US7508781B2 (en) * 2003-03-25 2009-03-24 Texas Instruments Incorporated Power saving mechanism for wireless LANs via schedule information vector
US7245946B2 (en) * 2003-07-07 2007-07-17 Texas Instruments Incorporated Optimal power saving scheduler for 802.11e APSD
US7711377B2 (en) * 2004-06-10 2010-05-04 Qualcomm Incorporated Efficient paging in a wireless communication system
KR100678084B1 (ko) * 2004-07-21 2007-02-02 삼성전자주식회사 이동통신 단말기의 전원을 절약하는 장치 및 방법
CN106941666B (zh) * 2005-04-25 2020-10-30 美商内数位科技公司 无线系统中效率寻址及功率节省方法及系统
US7577438B2 (en) 2005-04-25 2009-08-18 Interdigital Technology Corporation Method and system for efficient addressing and power savings in wireless systems
US8014818B2 (en) * 2006-01-04 2011-09-06 Interdigital Technology Corporation Methods and systems for providing efficient operation of multiple modes in a WLAN system
TWI419533B (zh) 2006-01-04 2013-12-11 Interdigital Tech Corp Ｗｌａｎ系統中提供多模式有效率操作方法及系統
US7669070B2 (en) * 2007-02-14 2010-02-23 Microsoft Corporation Efficient communication power usage
US20100008276A1 (en) * 2008-07-11 2010-01-14 Milind Kopikare Power save mode for access points
KR101564107B1 (ko) * 2009-03-11 2015-10-29 삼성전자주식회사 통신 시스템에서 슬립모드 동작 제어 방법 및 장치
EP2409486A4 (en) * 2009-03-18 2012-08-22 Bayer Materialscience Ag OPTICAL TRENCH LEVEL SYSTEM
KR101721671B1 (ko) * 2009-10-26 2017-03-30 한국전자통신연구원 다중 모드 무선 통신 시스템에서 패킷 모드 자동 검출 방법, 상기 패킷 모드 자동 검출을 위한 시그널 필드 전송방법 및 상기 패킷 모드에 기반한 이득 제어 방법
EP4113877B8 (en) * 2009-12-02 2024-03-13 Marvell Asia Pte, Ltd. Method and apparatus for sounding multiple stations
KR101807732B1 (ko) * 2010-03-09 2018-01-18 삼성전자주식회사 파워 세이빙을 위한 멀티 유저 무선 네트워크 및 멀티 유저 무선 네트워크에서 단말 및 액세스 포인트의 통신 방법
WO2012058728A1 (en) * 2010-11-05 2012-05-10 Gregory James Hopper Medal mounting apparatus
ES2598028T3 (es) * 2011-01-16 2017-01-24 Lg Electronics Inc. Procedimiento para comunicación basado en asignación de información de identificación y aparato para el mismo

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102076067A (zh) * 2010-12-23 2011-05-25 北京星网锐捷网络技术有限公司 无线站点的休眠方法、装置和设备及通信系统

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
"802.11 Working Group of the 802 Committee", DRAFT STANDARD FOR INFORMATION TECHNOLOGY-TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS-LOCAL AND METROPOLITAN AREA NETWORKS-SPECIFIC REQUIREMENTS, May 2011 (2011-05-01), pages 1 - 263, XP055029327 *
CHEN, CHINHUNG (JACKSON) ET AL.: "Proposed TGac Draft Amendment.", IEEE P802.11 WIRELESS LANS, 18 January 2011 (2011-01-18), pages 1 - 161, XP055099811 *
MERLIN, S: "11ac NDPA frame format", IEEE P802.11 WIRELESS LANS, 14 March 2011 (2011-03-14), pages 1 - 6, XP055099806 *
SANDHYA, P ET AL.: "Comment resolution for CIDs: 2110, 3578, 2288", IEEE P802.11 WIRELESS LANS. 07, 7 November 2011 (2011-11-07), pages 1 - 3, XP068037898 *
See also references of EP2706792A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9935802B2 (en) 2013-04-19 2018-04-03 Lg Electronics Inc. Method for transmitting signal field and apparatus therefor
EP2988462B1 (en) * 2013-04-19 2018-10-31 LG Electronics Inc. Method and apparatus for transmitting the hew-sig field in wlan communications systems

Also Published As

Publication number Publication date
RU2565049C2 (ru) 2015-10-20
AU2012265526B2 (en) 2015-03-19
US10206172B2 (en) 2019-02-12
RU2604638C1 (ru) 2016-12-10
CN102843755B (zh) 2014-12-24
EP2706792A1 (en) 2014-03-12
EP2706792B1 (en) 2018-05-09
US20170339643A1 (en) 2017-11-23
EP2706792A4 (en) 2014-08-20
AU2012265526A1 (en) 2013-12-19
CN104394583A (zh) 2015-03-04
CN102843755A (zh) 2012-12-26
US20140185506A1 (en) 2014-07-03
RU2014102180A (ru) 2015-07-27
EP3393177B1 (en) 2020-04-29
BR112013032926A2 (pt) 2017-01-24
ES2675502T3 (es) 2018-07-11
KR101593290B1 (ko) 2016-02-11
BR112013032926B1 (pt) 2022-03-29
KR20140018990A (ko) 2014-02-13
US9743355B2 (en) 2017-08-22
CN104394583B (zh) 2018-07-13
EP3393177A1 (en) 2018-10-24
KR20160018832A (ko) 2016-02-17
KR101675724B1 (ko) 2016-11-11

Similar Documents

Publication Publication Date Title
WO2012163147A1 (zh) 节省功耗的方法及站点设备
JP6557764B2 (ja) アクセスポイント、端末、及びそれぞれの通信方法
JP6148700B2 (ja) アクセスポイントの通信方法及びアクセスポイント
KR20110102161A (ko) 파워 세이빙을 위한 멀티 유저 무선 네트워크 및 멀티 유저 무선 네트워크에서 단말 및 액세스 포인트의 통신 방법
US20070147423A1 (en) More Power Save Multi-Poll Indication
JP2013535935A5 (zh)
KR101901186B1 (ko) 전송 장치 및 수신 장치의 통신 방법
US9232361B2 (en) System and method for direct multi-user transmission
WO2018077007A1 (zh) 帧传输方法、设备及系统
KR101489106B1 (ko) 무선랜 시스템에서 파워 세이브 모드 운영 방법 및 이를 지원하는 장치
US9532307B2 (en) Network discovery method, access point, and terminal device
WO2018171409A1 (zh) 站点唤醒方法及目标站点
AU2015202083B2 (en) Power save method and station device
WO2013097795A1 (zh) 一种实现站点睡眠的方法、装置及系统
KR20190117401A (ko) 블룸 필터를 이용한 wur 멀티캐스팅 장치 및 방법

Legal Events

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

Ref document number: 12792370

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2012792370

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 20137033444

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2012265526

Country of ref document: AU

Date of ref document: 20120323

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2014102180

Country of ref document: RU

Kind code of ref document: A

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112013032926

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 112013032926

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20131219