WO2022156364A1 - Procédé et appareil de surveillance de liaison sans fil, terminal sans fil et support d'enregistrement - Google Patents

Procédé et appareil de surveillance de liaison sans fil, terminal sans fil et support d'enregistrement Download PDF

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Publication number
WO2022156364A1
WO2022156364A1 PCT/CN2021/133723 CN2021133723W WO2022156364A1 WO 2022156364 A1 WO2022156364 A1 WO 2022156364A1 CN 2021133723 W CN2021133723 W CN 2021133723W WO 2022156364 A1 WO2022156364 A1 WO 2022156364A1
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WIPO (PCT)
Prior art keywords
synchronization information
monitoring
wake
beacon frame
information
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PCT/CN2021/133723
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English (en)
Chinese (zh)
Inventor
许超杰
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Oppo广东移动通信有限公司
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Publication of WO2022156364A1 publication Critical patent/WO2022156364A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
    • H04W56/006—Synchronisation arrangements determining timing error of reception due to propagation delay using known positions of transmitter and receiver

Definitions

  • the embodiments of the present application relate to the field of terminal technologies, and in particular, to a method, an apparatus, a wireless terminal, and a storage medium for monitoring a wireless link.
  • the wireless terminal and the router do not need to exchange data most of the time.
  • the router will periodically send a beacon frame (Beacon) to the wireless terminal through the Access Point (AP), which is used to indicate whether the router needs to send a beacon frame to the wireless terminal.
  • Beacon beacon frame
  • AP Access Point
  • Downlink data of the terminal Therefore, in order to save power consumption, the wireless link of the wireless terminal is always in a sleep state, and the wireless terminal will wake up the wireless link only when it monitors the Beacon indicating that the router has downlink data that needs to be sent to the wireless terminal. Data interaction is performed between the wireless link and the router.
  • the embodiments of the present application provide a method, device, wireless terminal and storage medium for monitoring a wireless link in a wireless terminal, which can reduce the power consumption of monitoring the wireless link.
  • the technical solution is as follows:
  • a method of monitoring a wireless link in a wireless terminal comprising:
  • the position offset information being used to indicate the position offset between the synchronization information and the wake-up indicator
  • the wake-up indication is monitored.
  • a device for monitoring a wireless link in a wireless terminal includes a configuration module, a timing module, a synchronization module, a receiving module and a decision module;
  • the configuration module is configured to configure a target time to the timing module based on the location of the synchronization information in the beacon frame; based on the predetermined synchronization information, configure the synchronization information of the synchronization module as the predetermined synchronization information; and based on the predetermined synchronization information
  • a wake-up indication identifier configures the decision module
  • the timing module configured to wake up the wireless link based on the target moment configured by the configuration module
  • the synchronization module configured to determine synchronization information in the received beacon frame based on the predetermined synchronization information
  • the receiving module configured to start receiving the beacon frame from the location of the synchronization information
  • the decision module is configured to determine whether to wake up the wireless link based on the wake-up indication identifier.
  • an apparatus for monitoring a wireless link in a wireless terminal comprising:
  • a first determining module configured to determine the location of the synchronization information in the beacon frame based on the predetermined synchronization information
  • a second determining module configured to determine the position of the wake-up indication mark according to the position of the synchronization information and position offset information, where the position offset information is used to indicate the difference between the synchronization information and the wake-up indication mark the position offset of ;
  • a monitoring module configured to monitor the wake-up indicator based on the location of the wake-up indicator.
  • a wireless terminal in another aspect, includes a processor and a memory; the memory stores at least one piece of program code, and the at least one piece of program code is used to be executed by the processor to implement the above aspects.
  • a computer-readable storage medium stores at least one piece of program code, the at least one piece of program code for being executed by the processor to implement the listening wireless link as described in the above aspects Methods.
  • a computer program product stores at least one program code, the at least one program code is loaded and executed by a processor to implement the method for monitoring a wireless link described in the above aspects.
  • the beacon frame includes a wake-up indication and synchronization information before the wake-up indication. Therefore, when monitoring the beacon frame, the position of the wake-up indicator that can be determined based on the position and position offset information of the synchronization information, starts monitoring the beacon frame at the position where the wake-up indicator is located, so that there is no need to monitor the beacon frame.
  • the information before the synchronization information delays the start time of each monitoring period when monitoring the wireless link, reduces the duration of monitoring the beacon frame, and further reduces the power consumption of the wireless link monitoring the beacon frame.
  • FIG. 1 shows a schematic structural diagram of a wireless terminal provided by an exemplary embodiment of the present application
  • FIG. 2 shows a schematic diagram of monitoring a beacon frame according to an exemplary embodiment of the present application
  • FIG. 3 shows a flowchart of a method for monitoring a beacon frame according to an exemplary embodiment of the present application
  • FIG. 4 shows a schematic diagram of a frame structure of a beacon frame according to an exemplary embodiment of the present application
  • FIG. 5 shows a block diagram of an apparatus for monitoring a wireless link according to an exemplary embodiment of the present application
  • FIG. 6 shows a flowchart of a method for monitoring a wireless link according to an exemplary embodiment of the present application
  • FIG. 7 shows a schematic diagram of monitoring a beacon frame according to an exemplary embodiment of the present application.
  • FIG. 8 shows a schematic diagram of monitoring a beacon frame according to an exemplary embodiment of the present application.
  • FIG. 9 shows a structural block diagram of an apparatus for monitoring a wireless link provided by an embodiment of the present application.
  • plural refers to two or more.
  • “And/or”, which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone.
  • the character “/” generally indicates that the associated objects are an "or" relationship.
  • a method for monitoring a wireless link in a wireless terminal comprising:
  • the determining the location of the synchronization information in the beacon frame based on the predetermined synchronization information includes:
  • the method further includes:
  • the starting to receive the beacon frame from the location of the synchronization information includes:
  • the beacon frame is received.
  • the method further includes:
  • the monitoring continues until the current monitoring period is completed.
  • the predetermined synchronization information includes a medium access control sublayer protocol layer MAC field or any fixed field in a physical protocol layer header PHY header.
  • the wake-up indication identification includes a transmission indication TIM IE field.
  • the synchronization information is adjacent to the wake-up indicator.
  • a device for monitoring a wireless link in a wireless terminal includes: a configuration module, a timing module, a synchronization module, a receiving module and a decision module;
  • the configuration module is configured to configure a target time to the timing module based on the location of the synchronization information in the beacon frame; configure the synchronization information of the synchronization module as the predetermined synchronization information based on the predetermined synchronization information; and configure the decision based on the wake-up indication identifier module;
  • the timing module is used to wake up the wireless link based on the target time configured by the configuration module;
  • the synchronization module configured to determine synchronization information in the received beacon frame based on the predetermined synchronization information
  • the receiving module for starting to receive the beacon frame from the position of the synchronization information
  • the decision module is configured to determine whether to wake up the wireless link based on the wake-up indication identifier.
  • the configuration module is further configured to determine the position of the synchronization information in the beacon frame based on the predetermined synchronization information; according to the position of the synchronization information and the position offset information, determine the position of the wake-up indicator, the position offset is
  • the shift information is used to indicate a position offset between the synchronization information and the wake-up indication identifier; and the target time is determined based on the position offset.
  • the beacon frame includes a wake-up indication and synchronization information before the wake-up indication. Therefore, when monitoring the beacon frame, the position of the wake-up indicator that can be determined based on the position and position offset information of the synchronization information, starts monitoring the beacon frame at the position where the wake-up indicator is located, so that there is no need to monitor the beacon frame.
  • the information before the synchronization information delays the start time of each monitoring period when monitoring the wireless link, reduces the duration of monitoring the beacon frame, and further reduces the power consumption of the wireless link monitoring the beacon frame.
  • FIG. 1 shows a structural block diagram of a wireless terminal 100 provided by an exemplary embodiment of the present application.
  • the wireless terminal 100 is a wireless terminal that can access a wireless local area network as a wireless station, such as a smart phone, a tablet computer, a wearable device, or the like.
  • the wireless terminal 100 in this application includes at least one or more of the following components: a processor 110 , a memory 120 and a wireless link 130 .
  • the processor 110 includes one or more processing cores.
  • the processor 110 uses various interfaces and lines to connect various parts of the entire wireless terminal 100, and executes various functions of the wireless terminal 100 by running or executing program codes stored in the memory 120 and calling data stored in the memory 120. and processing data.
  • the processor 110 adopts at least one of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA).
  • DSP Digital Signal Processing
  • FPGA Field-Programmable Gate Array
  • PDA Programmable Logic Array
  • the processor 110 can integrate one or more of a central processing unit (Central Processing Unit, CPU), a graphics processor (Graphics Processing Unit, GPU), a neural network processor (Neural-network Processing Unit, NPU), and a modem, etc. The combination.
  • the CPU mainly handles the operating system, user interface and applications; the GPU is used to render and draw the content that the display needs to display; the NPU is used to implement artificial intelligence (AI) functions; the modem is used to process wireless communication. It can be understood that, the above-mentioned modem can also not be integrated into the processor 110, and can be implemented by a single chip.
  • the processor 110 is used to control the working status of the wireless link 130, and correspondingly, the processor 110 is a processor integrated with a wireless fidelity (Wireless Fidelity, Wi-Fi) chip.
  • the Wi-Fi chip is a chip capable of handling a single Wi-Fi processing.
  • the Wi-Fi chip is a chip with dual Wi-Fi processing capabilities.
  • the Wi-Fi chip is a Dual Band Dual Concurrent (DBDC) chip, or a Dual Band Simultaneous (DBS) chip, or the like. In the embodiments of the present application, this is not specifically limited.
  • the memory 120 includes a random access memory (Random Access Memory, RAM), and in some embodiments, the memory 120 includes a read-only memory (Read-Only Memory, ROM). In some embodiments, the memory 120 includes a non-transitory computer-readable storage medium. Memory 120 may be used to store program codes.
  • the memory 120 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), Instructions and the like for implementing the following various method embodiments; the storage data area may store data (such as audio data, phone book) and the like created according to the use of the wireless terminal 100 .
  • the memory 120 stores the identity of the network node to which the wireless link 130 is connected, the identity of the wireless link, and the like.
  • the wireless link 130 is used to connect an access node (Access Point, AP). Receive downlink data sent by AP.
  • the wireless link is a wireless link in the 2.4GHz frequency band.
  • the wireless terminal 100 also includes a display screen.
  • a display screen is a display component used to display a user interface.
  • the display screen is a display screen with a touch function, and through the touch function, a user can use any suitable object such as a finger, a stylus pen, and the like to perform a touch operation on the display screen.
  • the display screen is usually disposed on the front panel of the wireless terminal 100 .
  • the display screen is designed as a full screen, a curved screen, a special-shaped screen, a double-sided screen or a folding screen.
  • the display screen is also designed to be a combination of a full screen and a curved screen, a combination of a special-shaped screen and a curved screen, etc., which are not limited in this embodiment.
  • the structure of the wireless terminal 100 shown in the above drawings does not constitute a limitation on the wireless terminal 100, and the wireless terminal 100 includes more or less components than those shown in the drawings, or Combining certain components, or different component arrangements.
  • the wireless terminal 100 also includes components such as a microphone, a speaker, an input unit, a sensor, an audio circuit, a module, a power supply, and a Bluetooth module, which will not be repeated here.
  • the wireless terminal After the wireless terminal is connected to the AP, data interaction between the wireless terminal and the AP is not required most of the time.
  • the AP periodically sends a beacon frame (Beacon) to the wireless terminal, and the Beacon is used to indicate whether the AP has downlink data that needs to be sent to the wireless terminal. Therefore, in order to save power consumption, the wireless link of the wireless terminal is always in a sleep state, and the wireless terminal will wake up the wireless link only when it monitors the Beacon indicating that the router has downlink data that needs to be sent to the wireless terminal. Data interaction is performed between the wireless link and the router. Referring to FIG.
  • the wireless terminal generates a receive current at a time corresponding to each beacon frame, and receives the beacon frame through the receive current. It can be seen that the power consumption used for the wireless link in the wireless terminal depends on three factors, that is, the sleep current of the wireless link in the sleep state, the receiving current when receiving the Beacon, and the receiving processing time of the Beacon.
  • an AP whose transmission period of the beacon frame is 100 ms is used as an example for description.
  • the AP sends a beacon frame to the wireless link at the beacon frame transmission time (TBTT, Target Beacon Transmission Time) every 100ms.
  • the wireless terminal wakes up the wireless link at the TBTT time to receive the beacon frame.
  • the average current power consumption of the wireless link is related to the current size of the wireless link and the duration of each state according to different link states, see formula 1.
  • Current_avg is the average current consumption of the wireless link in the receiving period of a beacon frame
  • Current_bottom is the current consumption of the wireless link in the sleep state
  • Current_rx is the current consumption of the wireless link in the wake-up state
  • T_beacon is the wake-up duration of the wireless link in the reception period of one beacon frame. Because the receiving current of the wireless link is usually ten times or even hundreds of times higher than the current in the sleep state. Therefore, in the same beacon frame receiving period, the larger the T_beacon, the higher the Current_avg.
  • the system-on-chip (SOC, System on chip) of the Wi-Fi chip includes CPU, media access control sublayer protocol layer/physical protocol layer (MAC/PHY, MAC, Media Access Control; PHY, Physical Layer) chip and wireless link, etc. .
  • SOC System on chip
  • the process of receiving the beacon frame is implemented by the following steps, including: the wireless terminal powers on the wireless link at a fixed time before the TBTT through the hardware circuit, and wakes up the wireless link. After the wireless link is woken up, it waits for a period of time to reach a stable state, and receives beacon frames in the stable state.
  • the PHY header in the beacon frame is detected and demodulated to obtain the length of the beacon frame and the starting point of the MAC header, and the beacon frame is demodulated based on the length of the beacon frame and the starting point of the MAC header.
  • the method of waking up the wireless link through software has been improved, and the process of waking up the wireless link regularly and parsing the beacon frame is set in the hardware digital circuit (HW, Hardware). )middle.
  • the MAC/PHY digital circuit wakes up itself and the wireless link regularly, and after receiving the beacon frame, parses the PHY header and the MAC header in the beacon to determine whether the beacon frame contains information for indicating The wake-up indicator of the delivered data. If the wake-up indicator indicates that there is no downlink data to be sent, the wireless link will not be woken up, the HW and the wireless link will be closed again, and the sleep state will be returned. No CPU participation is required in this process. Therefore, compared with the software solution, the extra CPU current consumption caused by the CPU periodically waking up the wireless link and parsing the beacon frame is saved.
  • the wireless link is woken up by hardware and the beacon frame is parsed, and the HW is periodically woken up before the TBTT in this process.
  • the transmission rate of the wireless beacon frame (Wi-Fi Beacon) in the 2.4GHz frequency band usually adopts 1Mbps in the 802.11b standard
  • the modulation method is Binary Phase Shift Keying (BPSK, Binary Phase Shift Keying) modulation.
  • BPSK Binary Phase Shift Keying
  • both the PHY header and the MAC payload (MAC payload) use the same modulation method.
  • FIG. 4 is a frame structure of a beacon frame using a transmission rate of 1 Mbps in the 802.11b standard.
  • the frame structure includes a physical layer convergence protocol preamble (PLCP preamble, Physical Layer Convergence Protocol preamble), a physical layer convergence protocol header (PLCP header) and a sublayer service data unit (PSDU, Physical Service Data Unit).
  • PLCP preamble includes synchronization structure (Synchronization) and frame start delimiter (SFD, StartofFrameDelimiter);
  • PLCP header includes signal (signal), service (service), length (length) and check code (CRC, Cyclic Redundancy Check) );
  • the PSDU includes a MAC header (Media Access Control header), a fixed part (fixed part), a wake-up indication (DTIM, Delivery Traffic indication) and other information (other IE).
  • the PHY header is used as the starting position, and the received beacon frame is parsed according to the pre-specified standard synchronization information, and the position of the PLCP preamble in the beacon frame is determined, thereby determining the beginning of the PHY header.
  • Location The position of the wake-up indicator is determined according to the starting position of the PHY header and the lengths of different frame sequences in the beacon frame, and whether to wake up the wireless link is determined according to the data of the position of the wake-up indicator.
  • the beacon frame includes a wake-up indication and synchronization information before the wake-up indication. Therefore, when monitoring the beacon frame, the position of the wake-up indicator that can be determined based on the position and position offset information of the synchronization information, starts monitoring the beacon frame at the position where the wake-up indicator is located, so that there is no need to monitor the beacon frame.
  • the information before the synchronization information delays the start time of each monitoring period when monitoring the wireless link, reduces the duration of monitoring the beacon frame, and further reduces the power consumption of the wireless link monitoring the beacon frame.
  • FIG. 5 shows a structural block diagram of an apparatus for monitoring a wireless link in a wireless terminal provided by an embodiment of the present application.
  • the device for monitoring the wireless link can be implemented as all or a part of the processor 110 through software, hardware or a combination of the two.
  • the device includes:
  • the configuration module is configured to configure a target time to the timing module based on the location of the synchronization information in the beacon frame; configure the synchronization information of the synchronization module as the predetermined synchronization information based on the predetermined synchronization information; and configure the decision based on the wake-up indication identifier module;
  • the timing module is used to wake up the wireless link based on the target time configured by the configuration module;
  • the synchronization module configured to determine synchronization information in the received beacon frame based on the predetermined synchronization information
  • the receiving module for starting to receive the beacon frame from the position of the synchronization information
  • the decision module is configured to determine whether to wake up the wireless link based on the wake-up indication identifier.
  • the configuration module is further configured to determine the position of the synchronization information in the beacon frame based on the predetermined synchronization information; according to the position of the synchronization information and the position offset information, determine the position of the wake-up indicator, the position offset is
  • the shift information is used to indicate a position offset between the synchronization information and the wake-up indication identifier; and the target time is determined based on the position offset.
  • the beacon frame includes a wake-up indication and synchronization information before the wake-up indication. Therefore, when monitoring the beacon frame, the position of the wake-up indicator that can be determined based on the position and position offset information of the synchronization information, starts monitoring the beacon frame at the position where the wake-up indicator is located, so that there is no need to monitor the beacon frame.
  • the information before the synchronization information delays the start time of each monitoring period when monitoring the wireless link, reduces the duration of monitoring the beacon frame, and further reduces the power consumption of the wireless link monitoring the beacon frame.
  • FIG. 6 shows a flowchart of a method for waking up a wireless link according to an exemplary embodiment of the present application.
  • the executive body in the embodiment of the present application may be the wireless terminal 100.
  • the embodiment of the present application is executed by the processor 110 in the wireless terminal 100, and is realized by relying on the operating system in the wireless terminal 100.
  • the executive body is the wireless terminal. 100 is used as an example to illustrate.
  • the method includes:
  • Step 601 The wireless terminal predetermines the synchronization information to determine the location of the synchronization information in the beacon frame.
  • the synchronization information is adjacent to the wake-up indicator, the synchronization information is before the wake-up indicator, and for the beacon frame delivered by each access node, the difference between the synchronization information and the wake-up indicator in the beacon frame is Position offset information is fixed.
  • the predetermined synchronization information is a sequence with fixed content.
  • the predetermined synchronization information includes a media access control sublayer protocol layer (MAC, Media Access Control) field or any of the physical protocol layer headers (PHY header, PHY, Physical Layer). Fixed field.
  • the predetermined synchronization information is a sequence carrying specific information of the access node.
  • the predetermined synchronization information is a Service Set Identifier (SSID, Service Set Identifier).
  • the predetermined synchronization information is the node identifier of the access node.
  • the predetermined synchronization information is the wireless name of the router connected by the wireless link, and the like.
  • the predetermined synchronization information is a sequence carrying fixed information of the access node and a sequence of other information.
  • the predetermined synchronization information is SSID+supported rate (supported rate). In this implementation manner, by increasing the length of the predetermined synchronization information, the accuracy of detecting the predetermined synchronization information is improved.
  • the wake-up indication identifier is used to indicate the situation of downlink data to be delivered in the network node.
  • the wake-up indication is identified as a TIM IE (Traffic Indication Map Element) field or a DTIM (Delivery Traffic Indication) or the like. It should be noted that different types of wake-up indications are located in the same position in the frame structure of the beacon frame.
  • TIM IE Traffic Indication Map Element
  • DTIM Delivery Traffic Indication
  • the wireless terminal configures the target time in the period of monitoring the beacon frame based on the location of the synchronization information.
  • the wireless link of the wireless terminal includes a configuration module, a timing module, a synchronization module, a receiving module and a decision module.
  • the wireless terminal configures the timing module, the synchronization module and the decision module through the configuration module in the hardware circuit.
  • the wireless terminal configures the timing module through the configuration module, so that the timing module can wake up the wireless link at the target time and receive the beacon frame through the wireless link.
  • the wireless terminal determines the position of the synchronization information based on the degree of matching of each sequence in the monitoring information with the predetermined synchronization information.
  • the wireless terminal determines the matching degree between the preset synchronization information and the sequence in the monitoring information.
  • the matching degree between the predetermined synchronization information and the sequence in the monitoring information is determined by the similarity between the predetermined synchronization information and each sequence.
  • the wireless terminal performs a correlation operation between the received monitoring information and the predetermined synchronization information, and obtains the matching degree between the predetermined synchronization information and each sequence in the monitoring information.
  • each sequence in the monitoring information is a sequence determined based on the structure of the beacon frame.
  • the wireless terminal determines the sequence with the highest matching degree as the synchronization information.
  • the wireless terminal determines the sequence with the highest degree of matching with the predetermined synchronization information from the multiple sequences. For example, the wireless terminal sorts the matching degrees corresponding to the multiple sequences, obtains a sorting result, and determines the sequence with the highest matching degree with the predetermined synchronization information from the sorting result.
  • the wireless terminal determines the sequence with the highest matching degree as the synchronization information, and determines the position of the sequence with the highest matching degree as the position of the synchronization information.
  • the position of the synchronization information is determined, and then the position of the synchronization information in the monitoring information is determined to complete the synchronization, and it is ensured that the wireless terminal can pass the monitored monitoring information.
  • the location of the wake-up indicator is determined.
  • the wireless terminal determines the synchronization information corresponding to the current wireless node based on the data interaction between the wireless terminal and the access node, and configures the timing module of the wireless link based on the synchronization information, so that the wireless link can receive the synchronization information based on the synchronization information.
  • Wakeup indicator in beacon frames Wherein, the wireless terminal starts to receive the beacon frame from the position of the synchronization information.
  • the process of receiving the beacon frame is implemented through the following steps (1)-(4), including:
  • the wireless terminal determines the amount of data before the synchronization information in the beacon frame.
  • the wireless terminal determines the amount of data before the synchronization information in the beacon frame based on the frame structure of the beacon frame.
  • the amount of data is the number of bytes in the sequence before the synchronization information in the beacon frame.
  • the wireless terminal receives the beacon frame sent by the access node, parses the beacon frame, and determines the amount of data before the synchronization information according to the parsing result obtained by the parsing.
  • the wireless terminal determines the transmission time required to receive the data amount based on the data amount and the transmission rate of the wireless link.
  • the wireless terminal determines the quotient of the data volume and the transmission rate as the transmission duration required to receive the data volume.
  • the wireless terminal delays the start time of the listening period by the transmission duration to obtain the target time.
  • the target time is a new start time for monitoring the beacon frame.
  • the wireless terminal determines the monitoring period for monitoring the beacon frame based on the original monitoring strategy, delays the start time of each monitoring period by the transmission duration, and obtains the target time for monitoring the beacon frame for each monitoring period.
  • the wireless terminal delays the start time of different beacon frame monitoring periods by the transmission duration, thereby delaying the time for the wireless terminal to wake up the wireless link.
  • the wireless terminal receives the beacon frame from the target time.
  • the wireless terminal configures the synchronization information of the access node through the configuration module.
  • the synchronization information corresponding to the beacon frame of the access node is stored.
  • obtain the predetermined synchronization information corresponding to the access node according to the connected access node and configure the timing module based on the predetermined synchronization information through the configuration model, so that the timing module can be used in each monitoring period.
  • the target time to receive monitoring information.
  • the wireless terminal After the wireless terminal connects to the access node each time, it configures the target time to monitor the access node, then each time the wireless terminal connects to the access node, it determines to monitor the access node through steps (1)-(3). target moment.
  • the configuration process of the timing module by the wireless terminal is performed when the wireless circuit and the access node are connected for the first time, and after the configuration is completed, the wireless terminal stores the corresponding relationship between the target time and the access node, When connecting to the access node next time, the target time corresponding to the node identifier is determined according to the node identifier of the access node.
  • the wireless terminal when establishing a connection with an access node, configures the start time of the beacon frame listening period corresponding to the access node.
  • the wireless terminal stores the correspondence between the access node and the target time locally. After each access point is connected, determine whether the access point is the first access, if it is the first access, perform the steps (1)-(3); if it is not the first access, according to The corresponding relationship between the access point and the target time determines the start time of the listening period corresponding to the access point.
  • the wireless link is a wireless link in the 2.4GHz frequency band.
  • the wireless link is a wireless link in a single Wi-Fi scenario, or the wireless link is a wireless link in a dual Wi-Fi scenario. In the embodiments of the present application, this is not specifically limited.
  • the dual Wi-Fi scenario refers to a scenario in which a wireless link connects two access nodes through two wireless links at the same time.
  • the two access nodes are access nodes in the same router, or the two access nodes are access nodes in different routers. In the embodiments of the present application, this is not specifically limited.
  • the frequency bands of the two wireless links of the wireless terminal are the same or different, for example, the two wireless links are both wireless links in the 2.4GHz frequency band; or, in the two wireless links, One wireless link is a wireless link in the 2.4GHz frequency band, and the other wireless link is a wireless link in the 5GHz, 6GHz and other frequency bands.
  • Step 602 The wireless terminal determines the location of the wake-up indicator according to the location and location offset information of the synchronization information.
  • the position offset information is used to indicate the position offset between the synchronization information and the wake-up indication identifier.
  • the offset between the wakeup indicator and the synchronization information in the monitoring information is fixed.
  • the wireless terminal determines the wake-up indication identifier in the monitored monitoring information based on the position and position offset information of the synchronization information.
  • the position offset information is used to represent the position offset between the synchronization information and the wake-up indication identifier.
  • the synchronization information is used as a starting point, and the position offset corresponding to the position offset information is offset backward in the monitoring information to obtain the position of the wake-up indicator.
  • the wireless terminal parses the beacon frame sent by the access node to determine the node identifier of the access node and the location of the wake-up indication identifier in the beacon frame.
  • the wireless terminal determines the position offset between the position of the wake-up indication and the position of the synchronization information, and records the position offset as the position offset information of the access node.
  • the wireless terminal determines the location offset information corresponding to the node identifier from the node identifier and the location offset information based on the node identifier of the currently connected access node.
  • the configuration module configures the decision module according to the position offset information corresponding to the access node.
  • the wireless terminal determines the location of the wake-up indication identifier based on the location offset information corresponding to the access node through the decision module.
  • the position offset information is the sum of the length of the synchronization information and the lengths of other information between the synchronization information and the wake-up indicator.
  • the length of the synchronization information in the beacon frame is Tag length: 16; the lengths of other information after the synchronization information are: Tag length: 8 and Tag length: 1 respectively, then determine the value of the offset information to be 25.
  • Step 603 The wireless terminal monitors the wake-up indicator based on the location of the wake-up indicator.
  • the wireless terminal After the wireless terminal enters the sleep state, it wakes up regularly in each listening period and listens to the beacon frame sent by the access node.
  • the wireless terminal determines the start time of each listening period as the target time. That is, the wireless terminal controls the wireless link to wake up at the target time of each monitoring period, starts to receive the monitoring information in the beacon frame from the target time of the monitoring period, and determines whether to wake up the wireless terminal based on the wake-up indication in the monitored monitoring information. link.
  • the process is accomplished through the following steps, including:
  • the wireless terminal performs monitoring through the wireless link to obtain monitoring information.
  • the monitoring information is a partial sequence in the beacon frame.
  • the wireless link wakes up the wireless link at the target time corresponding to each monitoring period, receives part of the sequence in the beacon frame, and obtains monitoring information.
  • the monitoring information is part of the information in the beacon frame.
  • the wireless terminal in response to monitoring the wake-up indication, stops monitoring. Referring to Figure 7, in this implementation, the wireless terminal is in a sleep state before the target time, does not receive information corresponding to the target time in the beacon frame, the wireless link is woken up at the target time, and receives part of the monitoring in the beacon frame information, after receiving the wake-up indication in the beacon frame, stop monitoring the beacon frame corresponding to the current monitoring period, and continue to sleep until the next monitoring period.
  • the wireless terminal does not monitor the monitoring information before the target time when monitoring the beacon frame, and stops monitoring after monitoring the wake-up indication, so that not only does it not need to wake up the wireless link before the target time, but also After monitoring the wake-up indication, it enters a sleep state, which further saves the time for monitoring the beacon frame, thereby reducing the power consumption for monitoring the beacon frame.
  • the wireless terminal in response to monitoring the wake-up indication, continues to monitor until the current monitoring period is completed.
  • the wireless terminal in this implementation, the wireless terminal is in a sleep state before the target time, does not receive information corresponding to the target time in the beacon frame, the wireless link is woken up at the target time, and receives part of the monitoring in the beacon frame information until the listening period ends.
  • the wireless terminal when the wireless terminal monitors the beacon frame, it does not monitor the monitoring information before the target time, so not only does it not need to wake up the wireless link before the target time, but also saves the time for monitoring the beacon frame, thereby reducing The power consumption of monitoring beacon frames is reduced.
  • the wireless terminal determines the location of the wake-up indicator from the monitoring information.
  • the wireless terminal parses the wake-up indication from the monitoring information.
  • the wireless terminal parses the position of the monitoring information to obtain an indication identifier for indicating wake-up.
  • the wireless terminal can re-determine the monitoring start time of the beacon frame based on the position of the synchronization information, and monitor the beacon frame based on the new start time of the beacon frame, thereby monitoring the complete
  • the beacon frame reduces the duration of monitoring the beacon frame, thereby reducing the power consumption of the wireless link for monitoring the beacon frame.
  • the wireless terminal wakes up the wireless link and sends the wake-up indicator information to the access node connected to the wireless link, indicating that the wireless link needs to be woken up.
  • the link has woken up. If the wake-up indication flag is used to indicate that the wireless link does not need to be woken up, after the wireless link enters the sleep state, the beacon frame continues to be monitored in the next monitoring period.
  • the beacon frame includes a wake-up indication and synchronization information before the wake-up indication. Therefore, when monitoring the beacon frame, the position of the wake-up indicator that can be determined based on the position and position offset information of the synchronization information, starts monitoring the beacon frame at the position where the wake-up indicator is located, so that there is no need to monitor the beacon frame.
  • the information before the synchronization information delays the start time of each monitoring period when monitoring the wireless link, reduces the duration of monitoring the beacon frame, and further reduces the power consumption of the wireless link monitoring the beacon frame.
  • FIG. 9 shows a structural block diagram of an apparatus for monitoring a wireless link in a wireless terminal provided by an embodiment of the present application.
  • the device for monitoring the wireless link can be implemented as all or a part of the processor 110 through software, hardware or a combination of the two.
  • the device includes:
  • a first determining module 901 configured to determine the location of the synchronization information in the beacon frame based on the predetermined synchronization information
  • the second determination module 902 is configured to determine the position of the wake-up indicator according to the position of the synchronization information and the position offset information, and the position offset information is used to indicate the position offset between the synchronization information and the wake-up indicator; as well as
  • the monitoring module 903 is configured to parse the wake-up indication identifier.
  • the first determining module 901 includes:
  • a first determining unit configured to determine the degree of matching between the predetermined synchronization information and the sequence in the monitoring information
  • the second determining unit is configured to determine the sequence with the highest matching degree as the synchronization information, and determine the position of the synchronization information.
  • the apparatus further includes:
  • the receiving module is configured to start receiving the beacon frame from the position of the synchronization information.
  • the receiving module includes:
  • a third determining unit configured to determine the amount of data before the synchronization information in the beacon frame
  • a fourth determining unit configured to determine the transmission duration required to receive the data amount based on the data amount and the transmission rate of the wireless link
  • an extension unit for delaying the start time of the listening period by the transmission duration to obtain the target time
  • the receiving unit is configured to receive the beacon frame from the target time.
  • the monitoring module 903 is further configured to stop monitoring in response to monitoring the wake-up indication; or,
  • the monitoring module 903 is further configured to continue monitoring in response to monitoring the wake-up indication identifier until the current monitoring period is completed.
  • the predetermined synchronization information includes the MAC field or any fixed field in the PHY header.
  • the wake-up indication includes a TIM IE field.
  • the synchronization information is adjacent to the wake-up indicator.
  • the beacon frame includes a wake-up indication and synchronization information before the wake-up indication. Therefore, when monitoring the beacon frame, the position of the wake-up indicator that can be determined based on the position and position offset information of the synchronization information, starts monitoring the beacon frame at the position where the wake-up indicator is located, so that there is no need to monitor the beacon frame.
  • the information before the synchronization information delays the start time of each monitoring period when monitoring the wireless link, reduces the duration of monitoring the beacon frame, and further reduces the power consumption of the wireless link monitoring the beacon frame.
  • Embodiments of the present application further provide a computer-readable medium, where the computer-readable medium stores at least one piece of program code, and the at least one piece of program code is loaded by the processor and executes the following steps:
  • the position offset information is used to indicate the position offset between the synchronization information and the wake-up indicator
  • the determining the location of the synchronization information in the beacon frame based on the predetermined synchronization information includes:
  • the sequence with the highest matching degree is determined as the synchronization information, and the position of the synchronization information is determined.
  • the method further includes:
  • the starting to receive the beacon frame from the location of the synchronization information includes:
  • the beacon frame is received.
  • the method further includes:
  • the monitoring continues until the current monitoring period is completed.
  • the predetermined synchronization packet MAC field or any fixed field in the PHY header is not limited to, the predetermined synchronization packet MAC field or any fixed field in the PHY header.
  • the wake-up indication includes a TIM IE field.
  • the synchronization information is adjacent to the wake-up indicator.
  • the embodiment of the present application also provides a computer program product, where the computer program product stores at least one piece of program code, and the at least one piece of program code is loaded and executed by the processor to implement the following steps:
  • the position offset information is used to indicate the position offset between the synchronization information and the wake-up indicator
  • the determining the location of the synchronization information in the beacon frame based on the predetermined synchronization information includes:
  • the sequence with the highest matching degree is determined as the synchronization information, and the position of the synchronization information is determined.
  • the method further includes:
  • the starting to receive the beacon frame from the location of the synchronization information includes:
  • the beacon frame is received.
  • the method further includes:
  • the monitoring continues until the current monitoring period is completed.
  • the predetermined synchronization packet MAC field or any fixed field in the PHY header is not limited to, the predetermined synchronization packet MAC field or any fixed field in the PHY header.
  • the wake-up indication includes a TIM IE field.
  • the synchronization information is adjacent to the wake-up indicator.
  • the functions described in the embodiments of the present application can be implemented by hardware, software, firmware, or any combination thereof.
  • the functions can be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage medium is any available medium that can be accessed by a general purpose or special purpose computer.

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

Abstract

La présente demande concerne le domaine technique des terminaux, et concerne un procédé et un appareil pour surveiller une liaison sans fil dans un terminal sans fil, un terminal sans fil et un support d'enregistrement. Le procédé comprend : la détermination, sur la base d'informations de synchronisation prédéterminées, de la position d'informations de synchronisation dans un cadre de balise ; la détermination de la position d'un identifiant d'indication d'activation en fonction de la position des informations de synchronisation et d'informations de décalage de position, les informations de décalage de position étant utilisées pour indiquer un décalage de position entre les informations de synchronisation et l'identifiant d'indication d'activation ; et l'analyse de l'identifiant d'indication d'activation. Au moyen de la solution, il n'est pas nécessaire de surveiller des informations avant des informations de synchronisation dans un cadre de balise, de telle sorte que le point de début de chaque période de surveillance lors de la surveillance d'une liaison sans fil est retardé, la durée du cadre de balise de surveillance est réduite, et la consommation d'énergie du cadre de balise de surveillance de la liaison sans fil est réduite.
PCT/CN2021/133723 2021-01-22 2021-11-26 Procédé et appareil de surveillance de liaison sans fil, terminal sans fil et support d'enregistrement WO2022156364A1 (fr)

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