WO2024109614A1 - 信息指示方法及设备 - Google Patents

信息指示方法及设备 Download PDF

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Publication number
WO2024109614A1
WO2024109614A1 PCT/CN2023/131894 CN2023131894W WO2024109614A1 WO 2024109614 A1 WO2024109614 A1 WO 2024109614A1 CN 2023131894 W CN2023131894 W CN 2023131894W WO 2024109614 A1 WO2024109614 A1 WO 2024109614A1
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WIPO (PCT)
Prior art keywords
frame
link
sta
mode
indication information
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PCT/CN2023/131894
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English (en)
French (fr)
Inventor
顾祥新
全映桥
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展讯通信(上海)有限公司
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Publication of WO2024109614A1 publication Critical patent/WO2024109614A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communication technology, and in particular to an information indication method and device.
  • a Multi-Link Device can contain one or more Stations (STA). Multiple links can be established between two MLDs, and data can be transmitted on multiple links.
  • a STA belonging to a non-Access Point Multi-Link Device can instruct a corresponding access point (AP) in an Access Point Multi-Link Device (AP MLD) to enter a power save mode by sending power management information to the AP.
  • the STA is in a doze state most of the time in the power save mode. When it needs to receive data, it must first send a notification message to the corresponding AP to inform the AP that it is in an awake state before receiving data.
  • the present application provides an information indication method and device, which can reduce signaling load and improve system efficiency.
  • the present application provides an information indication method, which is applied to a first multi-link device, where the first multi-link device includes multiple STAs; the method includes:
  • a first STA among the multiple STAs sends a first indication information frame to the first AP, where the first indication information frame is used to indicate a power management mode or a wake-up state in a power saving mode of at least one target STA among the multiple STAs;
  • the first AP is an AP among multiple APs of the second multi-link device that has established a link with the first STA.
  • the first indication information frame is used to indicate a power management mode of at least one target STA among the multiple STAs
  • the first indication information frame includes a first field and a second field, the first field is used to indicate the link ID corresponding to the at least one target STA, and the second field is used to indicate whether the power management mode of the at least one target STA is a power saving mode or an active mode.
  • the first indication information frame is used to indicate that the at least one target STA is in an awake state in a power saving mode
  • the first indication information frame includes a first field, and the first field is used to indicate a link ID corresponding to the at least one target STA.
  • the first indication information frame is any one of the following frames: an action frame, a Power Save-Poll (PS-Poll) frame, a Quality of Service (QoS) data frame, or a QoS empty data frame;
  • an action frame a Power Save-Poll (PS-Poll) frame
  • QoS Quality of Service
  • QoS empty data frame or a QoS empty data frame
  • the second field is a power management subfield in a frame control field of the first indication information frame.
  • the first indication information frame is an action frame
  • the first field is a link ID bitmap subfield in a multi-link operation link information element of the action frame.
  • the first indication information frame is a QoS data frame or a QoS null data frame; the first field is a link ID bitmap subfield in an A control subfield of a high throughput control field of the QoS data frame or the QoS null data frame.
  • the first indication information frame is any one of the following frames: an action frame, a PS-Poll frame, a QoS data frame, or a QoS null data frame;
  • the first field is a reserved bit of a frame control field of the first indication information frame.
  • the first indication information frame is further used to trigger at least one target AP among the multiple APs to send a cache unit to a STA that has established a link with the target AP.
  • it also includes:
  • the first STA When multiple STAs of the first multi-link device are in the first enabled mode, the first STA receives confirmation information corresponding to the first indication information frame sent by the first AP; wherein, after the transmission of the confirmation information is completed and waiting for the first time period, each STA in the first enabled mode enters the first mode; the first mode is Enhanced Multi-Link Single-Radio (EMLSR) mode or Enhanced Multi-Link Multi-Radio (EMLMR) mode.
  • EMLSR Enhanced Multi-Link Single-Radio
  • EMLMR Enhanced Multi-Link Multi-Radio
  • the present application provides an information indication method, which is applied to a second multi-link device, where the second multi-link device includes multiple APs; the method includes:
  • a first AP among the multiple APs receives a first indication information frame sent by a first STA, where the first STA is a STA among the multiple STAs of a first multi-link device that has established a link with the first AP, and the first indication information frame is used to indicate a power management mode or a wake-up state in a power saving mode of at least one target STA among the multiple STAs.
  • the first indication information frame is used to indicate a power management mode of at least one target STA among the multiple STAs
  • the first indication information frame includes a first field and a second field, the first field is used to indicate the link ID corresponding to the at least one target STA, and the second field is used to indicate whether the power management mode of the at least one target STA is a power saving mode or an active mode.
  • the first indication information frame is used to indicate that the at least one target STA is in an awake state in a power saving mode
  • the first indication information frame includes a first field, and the first field is used to indicate a link ID corresponding to the at least one target STA.
  • the first indication information frame is any one of the following frames: an action frame, a PS-Poll frame, a QoS data frame, or a QoS null data frame;
  • the second field is a power management subfield in a frame control field of the first indication information frame.
  • the first indication information frame is an action frame
  • the first field is a link ID bitmap subfield in a multi-link operation link information element of the action frame.
  • the first indication information frame is a QoS data frame or a QoS null data frame; the first field is a link ID bitmap subfield in an A control subfield of a high throughput control field of the QoS data frame or the QoS null data frame.
  • the first indication information frame is any one of the following frames: an action frame, a PS-Poll frame, a QoS data frame, or a QoS null data frame;
  • the first field is a reserved bit of a frame control field of the first indication information frame.
  • the first indication information frame is further used to trigger at least one target AP among the multiple APs to send a cache unit to a STA that has established a link with the target AP.
  • it also includes:
  • the first AP determines that each STA in the enabled first mode enters the first mode after the first time period starts from the end moment when the confirmation information corresponding to the first indication information frame is sent to the first STA; wherein the first mode is the EMLSR mode or the EMLMR mode.
  • the present application provides an information indication device, applied to a first multi-link device, where the first multi-link device includes multiple STAs; the device includes a sending module, which is used to:
  • a first STA among the multiple STAs sends a first indication information frame to the first AP, where the first indication information frame is used to indicate a power management mode or a wake-up state in a power saving mode of at least one target STA among the multiple STAs;
  • the first AP is an AP among multiple APs of the second multi-link device that has established a link with the first STA.
  • the present application provides an information indication device, applied to a second multi-link device, where the second multi-link device includes a plurality of APs; the device includes a receiving module, which is used to:
  • a first AP among the multiple APs receives a first indication information frame sent by a first STA, where the first STA is a STA among the multiple STAs of a first multi-link device that has established a link with the first AP, and the first indication information frame is used to indicate a power management mode or a wake-up state in a power saving mode of at least one target STA among the multiple STAs.
  • the present application provides an electronic device, comprising: at least one processor and a memory;
  • the memory stores computer-executable instructions
  • the at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the information indication method provided in the first aspect.
  • the present application provides an electronic device, comprising: at least one processor and a memory;
  • the memory stores computer-executable instructions
  • the at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the information indication method provided in the second aspect.
  • the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when a computer executes the computer-executable instructions, the Information indication method; or, when a computer executes the computer-executable instruction, the information indication method provided in the second aspect is implemented.
  • the present application provides a computer program product, comprising a computer program, wherein when the computer program is executed by a computer, the computer program implements the information indication method provided in the first aspect; or, when the computer program is executed by a computer, the computer program implements the information indication method provided in the second aspect.
  • the information indication method and device provided in the present application can be applied to a multi-link device. Any one of the multiple STAs of the first multi-link device can send a first indication information frame to an AP with a link established among the multiple APs of the second multi-link device, indicating the power management mode of at least one target STA among the multiple STAs or the wake-up state in the power saving mode, thereby effectively reducing the signaling load and improving the system efficiency.
  • FIG1 is a schematic diagram of a communication scenario provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of a link between multi-link devices provided in an embodiment of the present application.
  • FIG3 is a schematic diagram of an implementation of MLSR non-AP MLD data transmission provided in an embodiment of the present application
  • FIG4 is a schematic diagram of a format of an EML control field provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of a format of an MLO link information element provided in an embodiment of the present application.
  • FIG6 is a schematic diagram of a MAC frame format provided in an embodiment of the present application.
  • FIG7 is a schematic diagram of an implementation of an information indication method provided in an embodiment of the present application.
  • FIG8 is a schematic diagram of another information indication method provided in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application.
  • module refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic or combination of hardware and/or software code that is capable of performing the functions associated with that element.
  • IEEE802.11be also known as Wi-Fi7 or Extremely High Throughput (EHT) technology
  • Wi-Fi7 is the next-generation Wi-Fi standard proposed after Wi-Fi6 (IEEE802.11ax). It achieves extremely high throughput through a series of system features and multiple mechanism enhancements.
  • one end is an access point AP device and the other end is a STA device.
  • the communication scenario can be understood in conjunction with Figure 1, which is a schematic diagram of a communication scenario provided in an embodiment of the present application. Referring to Figure 1, in the communication scenario, one end is an AP device and the other end is a STA device.
  • AP can be an access point for mobile users running on a wired network. It is mainly deployed in homes, buildings, and campuses. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also be deployed outdoors.
  • AP is equivalent to a bridge connecting wired networks and wireless networks. Its main function is to connect various wireless network clients together and then connect the wireless network to Ethernet.
  • AP can be a terminal device or network device with a Wi-Fi chip.
  • AP can be a device that supports the IEEE802.11ax standard.
  • AP can also be a device that supports multiple wireless local area networks (WLAN) standards such as IEEE802.11ac, IEEE802.11n, IEEE802.11g, IEEE802.11b, and IEEE802.11a.
  • WLAN wireless local area networks
  • STA can be a wireless communication chip, a wireless sensor or a wireless communication terminal.
  • a mobile phone that supports Wi-Fi communication function
  • a tablet computer that supports Wi-Fi communication function
  • a set-top box that supports Wi-Fi communication function
  • a smart TV that supports Wi-Fi communication function
  • a smart wearable device that supports Wi-Fi communication function
  • a vehicle communication device that supports Wi-Fi communication function
  • a computer that supports Wi-Fi communication function.
  • STA can support the IEEE802.11ax standard.
  • STA can also support multiple WLAN standards such as IEEE802.11ac, IEEE802.11n, IEEE802.11g, IEEE802.11b and IEEE802.11a.
  • the specific implementation methods of the AP device and the STA device can be selected according to actual needs. There is no restriction on this in the embodiments of the present application, as long as the AP device can be used as an access point and the STA device can be used as a site.
  • ML and MLD are introduced in IEEE802.11be. Based on the above introduction, in multi-link communication, one end is AP MLD and the other end is non-AP MLD.
  • MLD is a device that supports data transmission on multiple links at the same time. For example, it can communicate on the 2.4GHz, 5GHz and 6GHz frequency bands at the same time. Even when the number of antennas is limited, the multi-link device can switch between different frequency bands to select the best frequency band to ensure its communication quality.
  • an MLD can contain one or more STAs.
  • a non-AP MLD can have only one STA or multiple STAs.
  • One or more links can be established between two MLDs, and data can be transmitted on multiple links.
  • non-AP MLD and AP MLD that have established multi-links with each other can take advantage of multi-links to send and receive data on multiple links to achieve advantages such as high throughput/low latency.
  • MLD is essentially a device.
  • the AP MLD introduced above may include one or more APs, and the non-AP MLD may include one or more STAs.
  • a multi-link device may include one or more logical entities, each of which transmits data with the other end of the communication through a link, and the link is a wireless resource used to transmit data.
  • Figure 2 is a schematic diagram of links between multi-link devices provided in an embodiment of the present application.
  • the AP MLD currently includes AP1, AP2, ..., APn
  • the non-AP MLD includes STA1, STA2, ..., STAn
  • link 1 is established between AP1 and STA1
  • link 2 is established between AP2 and STA2, ...
  • link n is established between APn and STAn.
  • each AP can work on a different frequency band
  • each STA can work on a different frequency band.
  • each established link is also a link on a corresponding frequency band, and data can be transmitted on multiple links.
  • the specific number of APs included in the AP multi-link device and the specific number of STAs included in the STA multi-link device can be selected according to actual needs, and this embodiment does not limit this.
  • Multi-Link Single Radio (MLSR) non-AP MLD has only one radio and can only transmit data on one link at a time.
  • MLMR non-AP MLD (2) Multi-Link Multi-Radio (MLMR) non-AP MLD, where MLMR non-AP MLD has multiple radios and can transmit data on multiple links at the same time.
  • MLMR non-AP MLD has multiple radios and can transmit data on multiple links at the same time.
  • MLSR non-AP MLD can switch to different links at different times.
  • Figure 3 is a schematic diagram of an implementation of MLSR non-AP MLD for data transmission provided in an embodiment of the present application.
  • AP-MLD has three APs, namely AP1, AP2, and AP3.
  • non-AP MLD has three STAs, namely STA1, STA2, and STA3.
  • STA1 and AP1 have established a link, refer to link 1 in Figure 3
  • STA2 and AP2 have established a link, refer to link 2 in Figure 3
  • STA3 and AP3 have established a link, refer to link 3 in Figure 3.
  • STA1 and STA2 belonging to non-AP MLD can use the same Radio to send and receive data at different times.
  • the data sent and received in FIG3 can be transmitted as a Physical Protocol Data Unit (PPDU) carrying BU from AP MLD to non-AP MLD.
  • PPDU Physical Protocol Data Unit
  • link 1 is used for data transmission, and then link 2 is switched for data transmission, wherein the STA corresponding to the link for data transmission is in the awake state.
  • the power management subfield (Power Management subfield) of the MAC header (MAC header) of the last frame sent by STA1 to AP1 can indicate that STA1 enters the energy-saving mode.
  • the Power Management subfield of the frame control field of the frame sent by STA1 to AP1 indicates that STA1 enters the Power Save mode.
  • STA1 enters the doze state and the radio is switched to STA2 for data transmission.
  • STA1 in the doze state will periodically receive the Traffic Inidication Map (TIM). If the TIM indicates that there is data to be received, it will send a PS-Poll frame or a QoS Null frame to notify AP1 to switch to the awake state.
  • TIM Traffic Inidication Map
  • the existing standard also specifies an MLSR non-AP MLD that supports the EMLSR mode.
  • the non-AP MLD supporting EMLSR mode can send an Enhanced Multi-Link (EML) operating mode indication frame (Operating Mode Notification frame) to the AP MLD, and set the EMLSR mode subfield (EMLSR Mode subfield) to 1 to indicate that it wants to enable EMLSR mode.
  • EML Enhanced Multi-Link
  • the EMLSR mode can be enabled.
  • the EML operation mode notification frame is used to indicate that the non-AP MLD to which the STA sending data belongs is changing its EML operation.
  • the Category field indicates the type of action frame. This action frame is protected EHT, and the Category value is 37.
  • the EHT Action field takes the value 6, which indicates EML Operating Mode Notification.
  • the Dialog Token field is set by the non-AP MLD to a non-zero value selected by the non-AP MLD and by the AP MLD to a value copied from the corresponding received EML Operating Mode Notification frame.
  • the total length of the EML control field may be 65 bits, or 89 bits, or 113 bits.
  • the EML control field includes multiple subfields, which are described below.
  • the EMLSR Mode field occupies 1 bit and is located at bit position 0.
  • the EMLSR Mode field is used to indicate whether the non-AP MLD enables the EMLSR mode, where enabling the EMLSR mode actually means that the non-AP MLD runs in the EMLSR mode.
  • EMLMR mode occupies 1 bit and is located at bit position 1.
  • the EMLMR mode field is used to indicate whether the non-AP MLD enables the EMLMR mode, where enabling the EMLMR mode actually means that the non-AP MLD runs in the EMLMR mode.
  • the EMLSR Link Bitmap field occupies 16 bits, located at bit 2 to bit 17.
  • the EMLSR Link Bitmap field is used to indicate the EMLSR link set.
  • the links in the EMLSR link set are used to exchange frames between AP MLD and non-AP MLD in EMLSR mode.
  • the EMLSR Link Bitmap field can be 11100000 00000000 (Bit 0 is at the front), indicating that the EMLSR link set includes: Link1, Link2, Link3.
  • the Reserved field occupies 6 bits, located at bit 18 to bit 23.
  • the EMLMR Link Bitmap field occupies 0 bits or 16 bits, located at bit 24 to bit 39.
  • the EMLMR Link Bitmap field is used to indicate the EMLMR link set.
  • the links in the EMLMR link set are used to exchange frames between AP MLD and non-AP MLD in EMLMR mode.
  • the EMLMR Link Bitmap field can be 11000000 00000000 (Bit 0 is at the front). Indicates that the EMLMR link set includes: Link1 and Link2.
  • the number of bits occupied by the EMLMR Supported MCS And NSS Set field is variable, which may be located at bit 42-bit 65, bit 42-bit 89, or bit 42-bit 113.
  • the EMLMR Supported MCS And NSS Set field is used to indicate the set of modulation and coding schemes (MCS) and number of spatial streams (NSS) supported by the non-AP MLD in the EMLMR mode.
  • the MCS Map Count field occupies 0 bits or 2 bits and is located at bit 40-bit 41.
  • the MCS Map Count field is used to indicate the bits occupied by the MAS and NSS set fields supported by the above-mentioned EMLMR, specifically which of the following three types: bit 42-bit 65, bit 42-bit 89, bit 42-bit 113.
  • the STA in active mode or awake state in power save mode corresponding to the EMLSR link set of non-AP MLD monitors the link, including carrier sensing and receiving initial control frames.
  • the Radio that supports multiple in multiple out (MIMO) multi-stream has multiple radio frequency chains (RF chains), and these RF chains are tuned to these links respectively.
  • each link in the EMLSR link set returns to the listening state.
  • a STA When a STA wants to send uplink data, it needs to first use a single RF chain to perform carrier sensing to obtain the transmission opportunity and switch other RF chains to the link where the STA is located for transmission. (During the carrier sensing process, if this link or other links receive the initial control frame, the uplink transmission is delayed).
  • the non-AP MLD can send an EML Operating Mode Notification frame to the AP MLD and set the EMLSR mode field to 0, indicating that it wants to disable the EMLSR mode. After receiving the EML Operating Mode Notification frame in response from the AP MLD, it can disable the EMLSR mode.
  • a non-AP MLD that supports the EMLMR mode can send an enhanced multilink operating mode notification frame (EML Operating Mode Notification frame) to the AP MLD, and set the EMLMR Mode subfield (EMLMR Mode subfield) to 1 to indicate that it wants to enable the EMLMR mode.
  • EML Operating Mode Notification frame EML Operating Mode Notification frame
  • EMLMR Mode subfield EMLMR Mode subfield
  • the specific indication method can refer to the relevant content of the EML control field introduced above, which will not be repeated here.
  • non-AP MLD is indicated by the EMLMR Link Bitmap subfield. After a link in a link set performs the initial frame exchange, the non-AP MLD can:
  • PPDUs Receive Presentation Protocol Data Units
  • PPDUs are sent with a maximum of the number of Spatial Streams indicated by EMLMR Supported MCS And NSS Set.
  • the behavior of non-AP MLD is essentially to cut the Radio Frequency Chain (RF Chain) of other links in the EMLMR link set to the link performing frame exchange, so that the link obtains the transceiver capability indicated by the EMLMR Supported MCS And NSS Set.
  • RF Chain Radio Frequency Chain
  • the non-AP MLD can send an EML Operating Mode Notification frame to the AP MLD and set the EMLMR mode field to 0, indicating that it wants to disable the EMLMR mode. After receiving the EML Operating Mode Notification frame in response from the AP MLD, it can disable the EMLMR mode.
  • the STA when the STA is in the doze state, it periodically receives the TIM element (generally placed in the Beacon frame) sent by the AP, and the AP will cache the downlink data of the STA and notify the STA in the TIM element. After receiving the indication, the STA sends a PS-Poll frame or a QoS Null frame to the AP to notify the AP to wake up, and then the AP can send downlink data to the STA.
  • the TIM element generally placed in the Beacon frame
  • the AP After receiving the indication, the STA sends a PS-Poll frame or a QoS Null frame to the AP to notify the AP to wake up, and then the AP can send downlink data to the STA.
  • FIG. 5 is a schematic diagram of the format of an MLO Link Information element provided in an embodiment of the present application.
  • the element ID, length and element ID extension fields are defined in the standard 9.4.2.1 (General); the link ID bitmap field indicates the link on which the STA is expected to operate.
  • FIG. 6 is a schematic diagram of a MAC frame format provided in an embodiment of the present application.
  • the MAC frame consists of three parts: MAC Header, Frame body and Frame Check Sequence (FCS).
  • FCS Frame Check Sequence
  • MAC Header is a fixed format
  • frame body is a variable length, following the TLV (Type length value) format.
  • MAC Header contains the information of MAC frame.
  • Frame Body comes from the data of the network layer and is responsible for transmitting upper layer data between STAs.
  • FCS uses CRC check and 32-bit cyclic redundancy code. Frames that pass the integrity check require the receiving end to send a response frame.
  • the MAC header has a frame control field, a duration/identification (Duration/ID), an address 1, an address 2, an address 3, a sequence control field (Sequence Control), an address 4, a QOS control field, and a high-throughput (HT) control field.
  • Duration/ID duration/identification
  • Sequence Control sequence control field
  • HT high-throughput
  • the frame control field defines important status information such as the frame type, subtype, where it is sent from, power management, and whether it is encrypted. It is an important field for analyzing Wi-Fi frames.
  • Duration/flag indicates how long the frame and its confirmation frame will occupy the channel. Unlike wired transmission, in a Wi-Fi network environment, each data sender must take turns using the channel to avoid conflicts. The sender writes in this field how long the channel time will be occupied by its data transmission, which can facilitate subsequent senders to send data.
  • Address 1 indicates the MAC address of the receiver
  • address 2 indicates the MAC address of the sender
  • address 3 indicates the BSSID of Wi-Fi, which is usually the MAC address of the AP
  • address 4 is generally not used.
  • the sequence control field is mainly used to filter duplicate frames.
  • QOS control field Priority control field. Early standards did not provide a mechanism to distinguish service priorities, and could not provide different quality access services for different applications. When network traffic congestion occurs, service messages that need to be processed first (such as voice messages) and ordinary messages (such as web browsing messages) will be discarded with the same probability. This field can establish different priorities for different traffic, ensuring that higher priority data has a high probability of being successfully transmitted.
  • HT control field Starting from IEEE802.11n, MAC began to support 40M bandwidth, which is to merge the original two 20M bandwidths into one 40M bandwidth. This field provides some control for high-throughput data.
  • the frame control field format in the non-S1G PPDU includes the following information:
  • Type frame type, management frame 00, control frame: 01, data frame 10.
  • Subtype subtype of the frame. Each major frame type is divided into multiple subtypes.
  • More Fragment Used to indicate the situation where a long frame is fragmented and whether there are other frames. If so, the value is set to 1.
  • Retry (retransmission field): Indicates that this segment is a retransmission frame of the previously transmitted segment.
  • Power Management Indicates the power management mode adopted by the site after transmitting the frame. 1 means the site is in power saving mode (Power save mode), and 0 means the site is in normal mode (active mode).
  • More Data Indicates that there are many frames buffered in the station. That is, there is at least one data frame to be sent to the STA, which is set to 1.
  • the Protected Frame subfield if the Frame Body field contains information that has been processed by the encryption encapsulation algorithm, the Protected Frame subfield is set to 1.
  • the Protected Frame subfield is reserved in control frames of subtype Control Frame Extension. In data frames of subtype Null, QoS Null, QoS CF Poll, and QoS CF Ack+CF Poll, the Protected Frame subfield is set to 0.
  • the HT Control field is always present in the Control Wrapper frame and in the QoS Data frame, QoS Null Data frame determined by the +HTC subfield of the Frame Control field defined in 9.2.4.1.10 of the standard.
  • the format of the HT Control field is as shown in Table 2:
  • VHT Very high throughput
  • AC Constraint indicates whether the reverse direction frame (i.e., response frame) is constrained within the same TID. 1 indicates a constraint.
  • RDG/More PPDU is used to indicate whether the Duration/ID of the reverse direction frame is reserved.
  • the HT control field has three forms: HT variant, VHT variant, and HE variant.
  • the format is shown in Table 3:
  • the subordinate STAs in its EMLSR set enter the Power Save mode.
  • the current data transmission is completed, they all enter the doze state.
  • other STAs need to send in the EMLSR mode to enter the awake state (see the above content for the sending method), which is relatively inefficient. Therefore, how to instruct STAs to switch power management modes (active mode or power save mode) across links, and how to instruct STAs to awake in power save mode, are technical problems that need to be solved urgently.
  • the present application proposes an information indication method, which can indicate the power management mode of one or more STAs through a signaling, or indicate the awake state of one or more STAs in the power saving mode through a signaling, thereby effectively reducing the signaling load and improving the system efficiency.
  • an information indication method which can indicate the power management mode of one or more STAs through a signaling, or indicate the awake state of one or more STAs in the power saving mode through a signaling, thereby effectively reducing the signaling load and improving the system efficiency.
  • the above information indication method can be applied to a multi-link device.
  • at least two links are established between the first multi-link device and the second multi-link device.
  • the first multi-link device can be the non-AP MLD introduced above
  • the second multi-link device can be the AP MLD introduced above.
  • This embodiment does not limit the specific implementation of the first multi-link device and the second multi-link device, and does not limit the specific number of links between the first multi-link device and the second multi-link device. It can be selected and expanded according to actual needs.
  • the following takes the case where the first multi-link device is a non-AP MLD and the second multi-link device is an AP MLD as an example to introduce the above information indication method, wherein the first multi-link device includes multiple STAs and the second multi-link device includes multiple APs.
  • the above information indication method includes:
  • a first STA among the plurality of STAs sends a first indication information frame to the first AP, where the first indication information frame is used to indicate a power management mode or a wake-up in a power saving mode of at least one target STA among the plurality of STAs.
  • the first AP is an AP among multiple APs of the second multi-link device that establishes a link with the first STA.
  • the first multi-link device is a non-AP MLD and the second multi-link device is an AP-MLD.
  • the non-AP MLD has two STAs, namely STA1 and STA2; the AP-MLD has two APs, namely AP1 and AP2; STA1 and AP1 establish link 1, and STA2 and AP2 establish link 2.
  • STA1 may send a first indication information frame to AP1, indicating that the power management mode of STA1 and/or STA2 is an active mode (active mode) or a power saving mode (power save mode).
  • STA1 may send a first indication information frame to AP1, indicating that STA1 and/or STA2 are in an awake state in the power saving mode.
  • the power management mode of each STA in the non-AP MLD or the wake-up state in the power saving mode is determined by the non-AP MLD.
  • STA1 sends a first indication information frame to AP1, indicating that the power management mode of STA1 and STA2 is active mode or power save mode
  • STA2 does not need to send a notification frame to AP1 to tell AP1 that its power management mode is active mode or power save mode.
  • STA1 sends a first indication information frame to AP1, indicating that STA1 and STA2 are in the awake state in the power saving mode
  • STA2 does not need to send a notification frame to AP1 to tell AP1 that it is in the awake state in the power saving mode, thereby effectively saving signaling overhead and improving system efficiency.
  • the information indication method provided in the embodiment of the present application can indicate the power management mode of one or more STAs through a signal, or indicate the wake-up state of one or more STAs in the power saving mode through a signal, thereby effectively reducing the signaling load and improving system efficiency.
  • the above first indication information frame is used to indicate the power management mode of at least one target STA among the above multiple STAs.
  • the above first indication information frame includes a first field and a second field; the first field is used to indicate the link ID corresponding to the above at least one target STA, and the second field is used to indicate that the power management mode of the above at least one target STA is active mode or power save mode.
  • the first indication information frame is used to indicate that the at least one target STA is in an awake state in the power saving mode.
  • the first indication information frame includes a first field, and the first field is used to indicate a link ID corresponding to the at least one target STA.
  • the first indication information frame can be any one of the following frames: an action frame, a PS-Poll frame, a QoS data frame (QoS data frame) or a QoS Null frame (QoS Null frame); the second field is the power management subfield in the frame control field of the first indication information frame.
  • the above power management subfield occupies 1 bit. When the bit is 1, it indicates that the STA is in power save mode, and when it is 0, it indicates that the STA is in active mode.
  • the first indication information frame may be an action frame
  • the first field may be a link ID bitmap subfield in a multi-link operation link information element of the action frame.
  • the first indication information frame is also a QoS data frame or a QoS empty data frame; the above-mentioned first field is the link ID bitmap subfield in the A control subfield of the high throughput control field of the QoS data frame or the QoS empty data frame.
  • the first indication information frame is also any one of the following frames: an action frame, a PS-Poll frame, a QoS Data frame or QoS empty data frame; the above-mentioned first field is the reserved bit of the frame control field of the above-mentioned first indication information frame.
  • Method 1 Use action frame to indicate the power management mode of one or more target STAs, or to indicate that one or more target STAs in power save mode are awake.
  • the STA set can be indicated by the MLO Link Information element of the above action frame, and the STA set can be used to determine the link ID corresponding to the above one or more target STAs.
  • Category belongs to protected EHT.
  • the MLO Link Information element (existing element) includes a Link ID Bitmap subfield, each bit of which represents a Link ID established by different STAs.
  • the Link ID Bitmap subfield in the MLO Link Information element may indicate the link ID corresponding to the at least one target STA.
  • the power management mode of the above-mentioned at least one target STA is indicated by the power management subfield of the Frame control field of the above-mentioned action frame.
  • Method 2 Use QoS data frame or QoS Null frame to indicate the power management mode of one or more target STAs, or to indicate that one or more target STAs in power save mode are awake.
  • the STA set can be indicated by the A-Control subfield of the high throughput control field in the QoS data frame or the QoS Null frame, and the STA set can be used to determine the link ID corresponding to the above-mentioned one or more target STAs.
  • the A control subfield is introduced below in conjunction with Table 5.
  • the A control subfield includes a Control ID subfield and a Link ID Bitmap subfield.
  • the Control ID takes a certain value, such as 10, indicating that the subsequent 16-bit Link ID Bitmap, each bit of the Link ID Bitmap subfield represents the Link ID established by different STAs.
  • the Link ID Bitmap subfield in the A control subfield can indicate the link ID corresponding to the above-mentioned at least one target STA.
  • the power management mode of the above-mentioned at least one target STA is indicated by the power management subfield of the Frame control field of the above-mentioned QoS data frame or QoS Null frame.
  • Method three Use any one of the frames including PS-Poll, QoS Null frame, and QoS data frame to indicate the power management mode of one or more target STAs, or to indicate that one or more target STAs in power save mode are awake.
  • the reserved bit B14 of the frame control field of any of the above frames is used to indicate a STA set, which can be used to determine the link ID corresponding to the above one or more target STAs.
  • B14 when B14 is set to 1, it can be used to indicate that the STA power management mode of the EMLSR link set or the EMLMR link set is Power save mode, or to indicate that all target STAs in power save mode are awake.
  • the information indication method provided in the embodiment of the present application can indicate the power management mode of one or more STAs through a signal, or indicate the wake-up state of one or more STAs in the power saving mode through a signal, thereby effectively reducing the signaling load and improving system efficiency.
  • the above first indication information frame may also be used to trigger multiple APs in the above second multi-link device to send cache units to multiple STAs in the above first multi-link device.
  • FIG. 7 is a schematic diagram of an implementation of an information indication method provided in the embodiments of the present application.
  • the first multi-link device is non-AP MLD and the second multi-link device is AP-MLD.
  • non-AP MLD has two STAs, namely STA1 and STA2, and each of these two STAs supports 2 spatial streams (Spatial Stream);
  • AP-MLD has two APs, namely AP1 and AP2, and these two APs work at 2.4GHz and 5GHz respectively, and each supports 4 spatial streams.
  • STA1 and AP1 have established a link, refer to link 1 in Figure 7
  • STA2 and AP2 have established a link, refer to link 2 in Figure 7
  • the AID associated with link 1 and link 2 is AID1.
  • STA1 detects that the bit corresponding to AID1 in the TIM element is 1, it means that the current non-AP MLD has downlink data cached in the AP MLD.
  • STA1 seizes the air interface, and STA1 sends a first indication information frame to AP1. If the first field in the first indication information frame is 1100 0000 0000 0000, it means link1 and link2 are awake.
  • AP1 sends the cache unit to STA1
  • AP2 sends the cache unit to STA2
  • STA1 and STA2 receive the cache unit on their respective links, and extract their own aggregated MAC protocol data unit (Aggregated-MAC Protocol Data Unit, A-MPDU) from it, and reply with a block confirmation (Block Ack, BA).
  • A-MPDU aggregated MAC protocol data unit
  • the information indication method provided in the embodiment of the present application can indicate the wake-up state of one or more STAs in the power saving mode through a signaling, and trigger multiple APs to send cache units to multiple STAs, thereby effectively reducing the signaling load and improving system efficiency.
  • each STA in the enabled first mode enters the first mode; wherein the first mode is the EMLSR mode or the EMLMR mode.
  • the second STA after the first STA sends the first indication information frame to the first AP, if the second STA among multiple STAs receives a first frame sent by a second AP, the second STA sends confirmation information corresponding to the first frame to the second AP; wherein the second AP is an AP among multiple APs of the AP MLD that has established a link with the second STA.
  • the first frame may be an initial control frame, wherein the initial control frame may be, for example, a multi-user request to send frame (Multi-User Request To Send frame, MU-RTS), or the initial control frame may also be a BSRP (Buffer Status Report Poll frame).
  • MU-RTS Multi-User Request To Send frame
  • BSRP Buffer Status Report Poll frame
  • the first frame may be an initial frame (not limited to a control frame), wherein the initial frame may be, for example, QoS Null, or may be any other possible initial frame, which may be selected according to actual needs.
  • the initial frame may be, for example, QoS Null, or may be any other possible initial frame, which may be selected according to actual needs.
  • This embodiment also does not impose any restrictions on the initial frame in the EMLMR mode.
  • FIG. 8 is a schematic diagram of an implementation of another information indication method provided in the embodiments of the present application.
  • the first multi-link device is a non-AP MLD and the second multi-link device is an AP-MLD.
  • the non-AP MLD has two STAs, namely STA1 and STA2, each of which supports 2 spatial streams and supports the EMLSR mode;
  • the AP-MLD has two APs, namely AP1 and AP2, which work at 2.4GHz and 5GHz respectively, each of which supports 4 spatial streams and supports the EMLSR mode.
  • STA1 and AP1 have established a link, refer to Link 1 (Link1) in FIG8 ;
  • STA2 and AP2 have established a link, refer to Link 2 (Link2) in FIG8 ;
  • the AID associated with Link1 and Link2 is AID1.
  • the EMLSR mode can be enabled by exchanging EML Operating Mode Notification frames.
  • the EMLSR Link Bitmap is: 11000000 00000000 (Bit 0 is at the front), indicating that the EMLSR link set is Link 1 and Link 2. That is, both links can be used for frame exchange in the EMLSR mode. Afterwards, if there is no data transmission temporarily, STA1 and STA2 both enter the doze state, periodically receive the beacon frames on their respective links, and check the TIM elements therein.
  • STA1 detects that the bit corresponding to AID1 in the TIM element is 1, it means that the current non-AP MLD has downlink data cached in the AP MLD.
  • STA1 seizes the air interface, and STA1 sends a first indication information frame to AP1. If the first field in the first indication information frame is 1100 0000 0000 0000, it means link1 and link2 are awake.
  • the SIFS is the second time length introduced above.
  • Transition Delay is the first duration introduced above, wherein the non-AP MLD can notify the AP MLD of the Transition Delay introduced above in the EML Capabilities subfield of the Association Request frame.
  • STA2 monitors the MU-RTS Trigger Frame (that is, the first frame described above), in which there is an AID of AID1 in the User Info field, indicating that there is currently a message to be sent. Data for non-AP MLD.
  • CTS Clear To Send
  • the current FIG. 8 exemplarily introduces that the first frame is MU-RTS, or the first frame in FIG. 8 may also be BSRP, and the implementation method is similar, which will not be repeated here.
  • STA1 stops monitoring and switches the corresponding RF chain to STA2.
  • STA2 can then exchange frames with AP MLD.
  • STA2 receives the EHT MU PPDU sent by AP2, decodes one A-MPDU from the two spatial streams on its own Resource Units, and replies with a block confirmation message.
  • an information indication device is further provided in the embodiments of the present application, which is applied to the above first multi-link device and includes a sending module, which is used to:
  • a first STA among the multiple STAs sends a first indication information frame to a first AP, wherein the first indication information frame is used to indicate a power management mode or a wake-up state in a power saving mode of at least one target STA among the multiple STAs; wherein the first AP is an AP among the multiple APs of a second multi-link device that has established a link with the first STA.
  • an information indication device is further provided in the embodiments of the present application, which is applied to the above second multi-link device, and includes a receiving module, which is used to:
  • a first AP among the multiple APs receives a first indication information frame sent by a first STA, where the first STA is a STA among the multiple STAs of a first multi-link device that has established a link with the first AP, and the first indication information frame is used to indicate a power management mode or a wake-up state in a power saving mode of at least one target STA among the multiple STAs.
  • the communication device provided in the embodiment of the present application can indicate the power management mode of one or more STAs through a signal, or indicate the wake-up state of one or more STAs in the power saving mode through a signal, thereby effectively reducing the signaling load and improving system efficiency.
  • the above-mentioned information indication device may be a chip or a chip module, etc.
  • the modules included in the information indication device described in the above embodiments may be software modules or hardware modules, or may be partially software modules and partially hardware modules.
  • each module included therein may be implemented in the form of hardware such as circuits, or at least some modules may be implemented in the form of software programs, which run on a processor integrated inside the chip, and the remaining (if any) modules may be implemented in the form of hardware such as circuits;
  • each module included therein may be implemented in the form of hardware such as circuits, and different modules may be located in the same component (e.g., chip, circuit module, etc.) or in different components of the chip module, or at least some modules may be implemented in the form of software programs, which run on a processor integrated inside the chip module, and the remaining (if any) modules may be implemented in the form of hardware such as circuits; for each device or product applied to or integrated in a terminal, each module included therein may be implemented in the form of
  • an electronic device is also provided in the embodiments of the present application, wherein the terminal device includes at least one processor and a memory; wherein the memory stores computer execution instructions; the above at least one processor executes the computer execution instructions stored in the memory to implement the contents described in each embodiment corresponding to the above information indication method.
  • Figure 9 is a schematic diagram of the hardware structure of an electronic device provided in the embodiment of the present application.
  • the electronic device may be the first multi-link terminal or the second multi-link terminal.
  • the electronic device 90 of this embodiment includes: a processor 901 and a memory 902; wherein:
  • Memory 902 used to store computer-executable instructions
  • the processor 901 is used to execute the computer-executable instructions stored in the memory to implement the various steps in the method described in the above embodiment. For details, please refer to the relevant description in the above method embodiment.
  • the memory 902 may be independent or integrated with the processor 901 .
  • the device further includes a bus 903 for connecting the memory 902 and the processor 901 .
  • An embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored.
  • a processor executes the computer-executable instructions, each step of the method described in the above embodiment is implemented.
  • An embodiment of the present application provides a computer program product, including a computer program.
  • the computer program When the computer program is executed by a processor, the computer program implements the various steps of the method described in the above embodiment.
  • the disclosed devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.
  • modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional module in each embodiment of the present application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit.
  • the above-mentioned module-composed unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-mentioned integrated module implemented in the form of a software function module can be stored in a computer-readable storage medium.
  • the above-mentioned software function module is stored in a storage medium, including a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform some steps of the method described in each embodiment of the present application.
  • the aforementioned program can be stored in a computer-readable storage medium.
  • the steps of the aforementioned method embodiments are executed; and the aforementioned storage medium includes: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

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Abstract

本申请提供了一种信息指示方法及设备,涉及通信技术领域,可以应用于多链路设备,包括:第一多链路设备的多个STA中的第一STA向第二多链路设备中与第一STA建立有链路的第一AP发送第一指示信息帧,该第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态。本申请可以通过上述第一指示信息帧来指示一个或多个STA的电源管理模式或在节电模式下的苏醒状态,可以有效降低信令负荷,提升系统效率。

Description

信息指示方法及设备
本申请要求于2022年11月25日提交中国专利局、申请号为202211490948.0、申请名称为“信息指示方法及设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域,尤其涉及一种信息指示方法及设备。
背景技术
随着移动通信技术的发展,IEEE 802.11be引入了多链路(Multi-Link,ML),一个多链路设备(Multi-Link Device,MLD)可以包含一个或多个站点(Station,STA),两个MLD之间可以建立多条链路,数据可以在多条链路上传输。
目前,隶属于非接入点多链路设备(non-Access Point Multi-Link Device,non-AP MLD)的STA可以通过向隶属于接入点多链路设备(Access Point Multi-Link Device,AP MLD)中对应的接入点(Access Point,AP)发送电源管理信息,来指示其进入节电模式(power save mode);另外,STA在节电模式下大部分时间都处于打盹(doze)状态,当其需要进行数据接收的时候,要首先向对应的AP发送通知信息,告知对应的AP其处于已苏醒(awake)状态,然后再进行数据接收。
然而,上述实现方式会导致信令负荷较大,进而导致系统效率较低。
发明内容
本申请中提供一种信息指示方法及设备,可以降低信令负荷,提升系统效率。
第一方面,本申请提供一种信息指示方法,应用于第一多链路设备,所述第一多链路设备包括多个STA;所述方法包括:
所述多个STA中的第一STA向第一AP发送第一指示信息帧,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态;
其中,所述第一AP为第二多链路设备的多个AP中与所述第一STA建立有链路的AP。
在一些实施例中,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式;
其中,所述第一指示信息帧包括第一字段与第二字段,所述第一字段用于指示所述至少一个目标STA对应的链路ID,所述第二字段用于指示所述至少一个目标STA的电源管理模式为节电模式或活动模式。
在一些实施例中,所述第一指示信息帧用于指示所述至少一个目标STA在节电模式下处于苏醒状态;
其中,所述第一指示信息帧包括第一字段,所述第一字段用于指示所述至少一个目标STA对应的链路ID。
在一些实施例中,所述第一指示信息帧为以下帧中的任意一种:行动帧、省电-轮询(Power Save-Poll,PS-Poll)帧、服务质量(Quality of Service,QoS)数据帧或QoS空数据帧;
所述第二字段为所述第一指示信息帧的帧控制字段中的电源管理子字段。
在一些实施例中,所述第一指示信息帧为行动帧,所述第一字段为所述行动帧的多链路操作链路信息元素中的链路ID位图子字段。
在一些实施例中,所述第一指示信息帧为QoS数据帧或QoS空数据帧;所述第一字段为所述QoS数据帧或所述QoS空数据帧的高吞吐量控制字段的A控制子字段中的链路ID位图子字段。
在一些实施例中,所述第一指示信息帧为以下帧中的任意一种:行动帧、PS-Poll帧、QoS数据帧或QoS空数据帧;
所述第一字段为所述第一指示信息帧的帧控制字段的预留比特位。
在一些实施例中,所述第一指示信息帧还用于触发所述多个AP中的至少一个目标AP向与所述目标AP建立有链路的STA发送缓存单元。
在一些实施例中,还包括:
在所述第一多链路设备的多个STA处于使能第一模式时,所述第一STA接收所述第一AP发送的所述第一指示信息帧对应的确认信息;其中,在所述确认信息传输结束并等待第一时长后,处于使能第一模式的各个STA进入所述第一模式;所述第一模式为增强型多链路单射频(Enhanced Multi-Link Single-Radio,EMLSR)模式或增强型多链路多射频(Enhanced Multi-Link Multi-Radio,EMLMR)模式。
第二方面,本申请提供一种信息指示方法,应用于第二多链路设备,所述第二多链路设备包括多个AP;所述方法包括:
所述多个AP中的第一AP接收第一STA发送的第一指示信息帧,所述第一STA为第一多链路设备的多个STA中与所述第一AP建立有链路的STA,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态。
在一些实施例中,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式;
其中,所述第一指示信息帧包括第一字段与第二字段,所述第一字段用于指示所述至少一个目标STA对应的链路ID,所述第二字段用于指示所述至少一个目标STA的电源管理模式为节电模式或活动模式。
在一些实施例中,所述第一指示信息帧用于指示所述至少一个目标STA在节电模式下处于苏醒状态;
其中,所述第一指示信息帧包括第一字段,所述第一字段用于指示所述至少一个目标STA对应的链路ID。
在一些实施例中,所述第一指示信息帧为以下帧中的任意一种:行动帧、PS-Poll帧、QoS数据帧或QoS空数据帧;
所述第二字段为所述第一指示信息帧的帧控制字段中的电源管理子字段。
在一些实施例中,所述第一指示信息帧为行动帧,所述第一字段为所述行动帧的多链路操作链路信息元素中的链路ID位图子字段。
在一些实施例中,所述第一指示信息帧为QoS数据帧或QoS空数据帧;所述第一字段为所述QoS数据帧或所述QoS空数据帧的高吞吐量控制字段的A控制子字段中的链路ID位图子字段。
在一些实施例中,所述第一指示信息帧为以下帧中的任意一种:行动帧、PS-Poll帧、QoS数据帧或QoS空数据帧;
所述第一字段为所述第一指示信息帧的帧控制字段的预留比特位。
在一些实施例中,所述第一指示信息帧还用于触发所述多个AP中的至少一个目标AP向与所述目标AP建立有链路的STA发送缓存单元。
在一些实施例中,还包括:
在所述第一多链路设备的多个STA处于使能第一模式时,所述第一AP向所述第一STA发送所述第一指示信息帧对应的确认信息的结束时刻开始第一时长后,确定处于使能第一模式的各个STA进入所述第一模式;其中,所述第一模式为EMLSR模式或EMLMR模式。
第三方面,本申请提供一种信息指示装置,应用于第一多链路设备,所述第一多链路设备包括多个STA;所述装置包括发送模块,用于:
所述多个STA中的第一STA向第一AP发送第一指示信息帧,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态;
其中,所述第一AP为第二多链路设备的多个AP中与所述第一STA建立有链路的AP。
第四方面,本申请提供一种信息指示装置,应用于第二多链路设备,所述第二多链路设备包括多个AP;所述装置包括接收模块,用于:
所述多个AP中的第一AP接收第一STA发送的第一指示信息帧,所述第一STA为第一多链路设备的多个STA中与所述第一AP建立有链路的STA,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态。
第五方面,本申请提供一种电子设备,包括:至少一个处理器和存储器;
所述存储器存储计算机执行指令;
所述至少一个处理器执行所述存储器存储的计算机执行指令,使得所述至少一个处理器执行如第一方面提供的信息指示方法。
第六方面,本申请提供一种电子设备,包括:至少一个处理器和存储器;
所述存储器存储计算机执行指令;
所述至少一个处理器执行所述存储器存储的计算机执行指令,使得所述至少一个处理器执行如第二方面提供的信息指示方法。
第七方面,本申请提供一种计算机可读存储介质,所述计算机可读存储介质中存储有计算机执行指令,当计算机执行所述计算机执行指令时,实现如第一方面提供的 信息指示方法;或者,当计算机执行所述计算机执行指令时,实现如第二方面提供的信息指示方法。
第八方面,本申请提供一种计算机程序产品,包括计算机程序,所述计算机程序被计算机执行时,实现如第一方面提供的信息指示方法;或者,所述计算机程序被计算机执行时,实现如第二方面提供的信息指示方法。
本申请提供的信息指示方法及设备,可以应用于多链路设备,第一多链路设备的多个STA中的任意一个STA可以向第二多链路设备的多个AP中建立有链路的AP发送第一指示信息帧,指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态,由此可以有效降低信令负荷,提升系统效率。
附图说明
图1为本申请实施例中提供的一种通信场景示意图;
图2为本申请实施例中提供的一种多链路设备之间的链路示意图;
图3为本申请实施例中提供的一种MLSR non-AP MLD进行数据传输的实现示意图;
图4为本申请实施例中提供的一种EML控制字段的格式示意图;
图5为本申请实施例中提供的一种MLO链路信息元素的格式示意图;
图6为本申请实施例中提供的一种MAC帧格式示意图;
图7为本申请实施例中提供的一种信息指示方法的实现示意图;
图8为本申请实施例中提供的另一种信息指示方法的实现示意图;
图9为本申请实施例中提供的一种电子设备的硬件结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。此外,虽然本申请中公开内容按照示范性一个或几个实例来介绍,但应理解,可以就这些公开内容的各个方面也可以单独构成一个完整实施方式。
需要说明的是,本申请中对于术语的简要说明,仅是为了方便理解接下来描述的实施方式,而不是意图限定本申请的实施方式。除非另有说明,这些术语应当按照其普通和通常的含义理解。
本申请中说明书和权利要求书及附图中的术语“第一”、“第二”等是用于区别类似或同类的对象或实体,而不必然意味着限定特定的顺序或先后次序,除非另外注明。应该理解这样使用的用语在适当情况下可以互换,例如能够根据本申请实施例图示或描述中给出那些以外的顺序实施。
此外,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖但不排他的包含,例如,包含了一系列组件的产品或设备不必限于清楚地列出的那些组件,而是可包括没有清楚地列出的或对于这些产品或设备固有的其它组件。
本申请中使用的术语“模块”,是指任何已知或后来开发的硬件、软件、固件、人工智能、模糊逻辑或硬件或/和软件代码的组合,能够执行与该元件相关的功能。
IEEE802.11be,也称为Wi-Fi7或极高吞吐量(Extremely High Throughput,EHT)技术,是继Wi-Fi6(IEEE802.11ax)之后提出的下一代Wi-Fi标准,其通过一系列系统特性和多种机制增强功能来实现极高的吞吐量。
按IEEE802.11中对于通信两端的定义,其中的一端为接入点AP设备,另一端为STA设备,例如可以结合图1对该通信场景进行理解,图1为本申请实施例中提供的一种通信场景示意图。参照图1,在该通信场景中,一端为AP设备,另一端为STA设备。
其中,AP可以为移动用户运行在有线网络的接入点,主要部署于家庭、大楼内部以及园区内部,典型覆盖半径为几十米至上百米,当然,也可以部署于户外。AP相当于一个连接有线网和无线网的桥梁,主要作用是将各个无线网络客户端连接到一起,然后将无线网络接入以太网。具体的,AP可以是带有Wi-Fi芯片的终端设备或者网络设备。AP可以为支持IEEE802.11ax制式的设备。AP也可以为支持IEEE802.11ac、IEEE802.11n、IEEE802.11g、IEEE802.11b及IEEE802.11a等多种无线局域网(Wireless Local Area Networks,WLAN)制式的设备。
其中,STA可以为无线通讯芯片、无线传感器或无线通信终端。例如支持Wi-Fi通讯功能的移动电话、支持Wi-Fi通讯功能的平板电脑、支持Wi-Fi通讯功能的机顶盒、支持Wi-Fi通讯功能的智能电视、支持Wi-Fi通讯功能的智能可穿戴设备、支持Wi-Fi通讯功能的车载通信设备和支持Wi-Fi通讯功能的计算机等。可选地,STA可以支持IEEE802.11ax制式。STA也可以支持IEEE802.11ac、IEEE802.11n、IEEE802.11g、IEEE802.11b及IEEE802.11a等多种WLAN制式。
在实际实现过程中,AP设备和STA设备的具体实现方式可以根据实际需求进行选择,本申请实施例中对此不做限制,只要AP设备可以作为接入点,STA设备可以作为站点即可。
目前在IEEE802.11be中引入了ML与MLD,在上述介绍内容的基础上,在多链路通信中,一端是AP MLD,另一端为non-AP MLD。
其中,MLD是一种支持同时在多个链路上进行数据传输的设备。例如可以同时在2.4GHz、5GHz以及6GHz频段上进行通信,即使在天线数受限的情况下,多链路设备也可以在不同的频段上进行切换,从而选择最佳的频段,保证其通信质量。其中,一个MLD可以包含一个或多个STA,如non-AP MLD可以只有一个STA,也可以有多个STA。两个MLD之间可以建立一条或多条链路(link),数据可以在多条链路上传输。
其中,相互建立了多链路的non-AP MLD和AP MLD可以利用多链路的优势,在多个链路上进行数据收发,以达到高吞吐/低时延等优势。
可以理解的是,无论是non-AP MLD,还是AP MLD,MLD本质上都是一个设备,上述介绍的AP MLD可以包括一个或多个AP,non-AP MLD可以包括一个或多个STA,其可以理解为多链路设备中可以包括一个或多个逻辑实体,其中每个逻辑实体分别通过一条链路与通信另一端进行数据传输,链路是用于传输数据的无线资源。
示例性的,可以结合图2对AP MLD和non-AP MLD之间的多链路进行理解,图2为本申请实施例中提供的一种多链路设备之间的链路示意图。
如图2所示,假设当前在AP MLD中包括AP1、AP2、…、APn,以及在non-AP MLD中包括STA1、STA2、…、STAn,其中,AP1和STA1之间建立有链路1,AP2和STA2之间建立有链路2,…,APn和STAn之间建立有链路n。在一种可能的实现方式中,各个AP可以工作在不同的频段上,以及各个STA可以工作在不同的频段上,相应的,建立的各个链路也是在对应频段上的链路,数据可以在多条链路上传输。
在实际实现过程中,AP多链路设备中所包括的AP的具体数量,以及STA多链路设备中所包括的STA的具体数量均可以根据实际需求进行选择,本实施例对此不做限制。
现有标准规定了以下两种non-AP MLD:
(1)多链路单射频(Multi-Link Single Radio,MLSR)non-AP MLD,其中MLSR non-AP MLD只有一个radio,同一时间只能在一个链路上传输数据。
(2)多链路多射频(Multi-Link Multi-Radio,MLMR)non-AP MLD,其中MLMR non-AP MLD有多个radio,同一时间能在多个链路上传输数据。
其中,MLSR non-AP MLD在不同时间可以切换到不同的链路上。比如说可以参照图3进行理解,图3为本申请实施例中提供的一种MLSR non-AP MLD进行数据传输的实现示意图。
如图3所示,AP-MLD有三个AP,分别是AP1、AP2、AP3。以及non-AP MLD有三个STA,分别是STA1、STA2、STA3,其中,STA1和AP1建立了链接,参照图3中的链路1;STA2和AP2建立了链接,参照图3中的链路2;STA3和AP3建立了链接,参照图3中的链路3。
参照图3可以确定的是,隶属于non-AP MLD的STA1和STA2,在不同时间,可以使用同一个Radio收发数据,图3中收发的数据可以用是从AP MLD到non-AP MLD的携带BU的协议数据单元(Physical Protocol Data Unit,PPDU)传输。
参照图3可以确定,开始的时候是采用链路1进行数据传输,之后切换到链路2上进行数据传输,其中,进行数据传输的链路所对应的STA是处于awake状态的。而在切换到链路2前,STA1发给AP1的最后一个帧的MAC头部(MAC header)的电源管理子字段(Power Management subfield)可以指示STA1进入节能模式。
其中,STA1发给AP1的帧(frame)的帧控制字段(frame control field)的电源管理子字段(Power Management subfield)指示STA1进入节能模式(Power Save mode),在AP1发送给STA1的帧的帧控制字段的More Data子字段指示没有更多数据传输时,STA1进入doze状态,radio切换给STA2进行数据传输。其中,处于doze状态的STA1会周期性收取传输指示映射(Traffic Inidication Map,TIM),若TIM指示有数据要收取,则发送PS-Poll帧或QoS Null帧通知AP1其切换为awake状态。
进一步的,现有标准还规定了一种支持EMLSR模式的MLSR non-AP MLD。
其中,支持EMLSR模式的non-AP MLD可以给AP MLD发送增强型多链路(Enhanced Multi-Link,EML)工作模式指示帧(Operating Mode Notificaiton frame),通过将其中的EMLSR模式子字段(EMLSR Mode subfield)置为1,指示其欲使能 EMLSR模式。之后在收到AP MLD回复的EML操作模式通知帧(EML Operating Mode Notification frame)后,可以使能EMLSR模式。
下面对EML操作模式通知帧进行详细介绍。
EML操作模式通知帧用于指示发送数据的STA所属的non-AP MLD正在更改其EML操作。
下面结合表1对EML操作模式通知帧的操作字段格式(EML Operating Mode Notification frame Action field format)进行介绍。
表1
其中,类别字段表示行动帧(action frame)类型,此action frame为protected EHT,Category值为37;EHT Action field取值6,表示EML Operating Mode Notification。对话令牌字段由non-AP MLD设置为由non-AP MLD选择的非零值,并由AP MLD设置为从对应的接收到的EML操作模式通知帧中复制的值。
下面对EML控制字段的具体实现进行详细介绍,可以结合图4对EML控制字段进行理解,图4为本申请实施例中提供的一种EML控制字段的格式示意图。
如图4所示,EML控制字段的总长度可以是65比特,或者89比特,或者113比特,在EML控制字段内部包括多个子字段,下面对这些子字段分别进行说明。
其中,EMLSR模式(EMLSR Mode)字段占用1个比特,位于比特位0。EMLSR模式字段用于指示non-AP MLD是否使能EMLSR模式,其中使能EMLSR模式实际上就是non-AP MLD运行在EMLSR模式。
以及,EMLMR模式(EMLMR Mode)字段占用1个比特,位于比特位1。EMLMR模式字段用于指示non-AP MLD是否使能EMLMR模式,其中使能EMLMR模式实际上就是non-AP MLD运行在EMLMR模式。
以及,EMLSR链路位图(EMLSR Link Bitmap)字段占用16个比特,位于比特位2-比特位17。EMLSR链路位图字段用于指示EMLSR链路集合,EMLSR链路集合中的链路用于在EMLSR模式下,在AP MLD和non-AP MLD之间进行帧交换。比如说EMLSR链路位图字段可以为11100000 00000000(Bit0在最前面),表示EMLSR链路集包括:Link1、Link2、Link3。
以及,保留(Reserved)字段占用6个比特位,位于比特位18-比特位23。
以及,EMLMR链路位图(EMLMR Link Bitmap)字段占用0个比特或者16个比特,位于比特位24-比特位39。EMLMR链路位图字段用于指示EMLMR链路集合,EMLMR链路集合中的链路用于在EMLMR模式下,在AP MLD和non-AP MLD之间进行帧交换。比如说EMLMR链路位图字段可以为11000000 00000000(Bit0在最前面), 表示EMLMR链路集包括:Link1、Link2。
以及,EMLMR支持的MAS和NSS集合(EMLMR Supported MCS And NSS Set)字段所占用的比特数量是可变的,可能位于比特位42-比特位65,也可能位于比特位42-比特位89,也可能位于比特位42-比特位113。其中,EMLMR支持的MAS和NSS集合字段用于指示non-AP MLD在EMLMR模式下,所支持的调制与编码策略(Modulation and Coding Scheme,MCS)和空间流数(Number of Spatial Stream,NSS)的集合。
以及,MCS映射数量(MCS Map Count)字段占用0个比特或者2个比特,位于比特位40-比特位41。MCS映射数量字段用于指示上述的EMLMR支持的MAS和NSS集合字段所占用的比特为,具体是如下三种中的哪一种:比特位42-比特位65、比特位42-比特位89、比特位42-比特位113。
下面对EMLSR模式下的相关处理过程进行介绍,non-AP MLD在EMLSR这种模式下:
non-AP MLD的EMLSR链路集合中(由EMLSR Link Bitmap subfield指示)所对应的处于active模式或power save模式下awake状态的STA监听link,包括载波侦听和接收初始控制帧。其中,支持多进多出(multiple in multiple out,MIMO)多流的Radio,有多个射频链(Radio Frequency chain,RF chain),此时将这些RF chain分别调频到这些链路上。
当在某链路上收到初始控制帧后,在短帧间间隔(Short Inter Frame Space,SIFS)时间之后做相应的回复。
以及,SIFS后在该链路上进行EMLSR MIMO能力内的帧交换(frame exchange),此时RF chain会切换到该链路,其它链路上停止监听。
在帧交换停止后,EMLSR Transition Timeout(过渡超时)时间之后,回到EMLSR链路集合中的每条链路的监听状态。
某个STA要发上行数据,需要先以单个RF chain做载波侦听获得发送时机并在发送时将其它RF Chain切换到该STA所在Link进行发送。(在载波侦听过程中,若本link或其它link收到初始控制帧,则上行发送被推迟)。
另外,non-AP MLD可以给AP MLD发送EML Operating Mode Notification frame,将其中的EMLSR模式字段置为0,指示其欲去使能EMLSR模式,收到AP MLD回复的EML Operating Mode Notification frame后,可以去使能EMLSR模式。
上述介绍的是EMLSR模式的相关内容,更进一步,标准还规定了一种支持EMLMR模式的MLMR non-AP MLD,下面对EMLMR模式的相关内容进行介绍。
其中,支持EMLMR模式的non-AP MLD,可以给AP MLD发送增强型多链路操作模式通知帧(EML Operating Mode Notification frame),通过将其中的EMLMR模式子字段(EMLMR Mode subfield)置为1,指示其欲使能EMLMR模式。之后在收到AP MLD回复的EML Operating Mode Notification frame后,可以使能EMLMR模式。
其中具体的指示方式可以参照上述介绍的EML控制字段的相关内容,此处不再赘述。
non-AP MLD在EMLMR模式下,由EMLMR Link Bitmap subfield指示的EMLMR 链路集合中,某链路进行了初次帧交换(frame exchange)后,这个non-AP MLD可以:
在此链路上,以最大为EMLMR Supported MCS And NSS Set指示的接收空间流数(the number of Spatial Stream),接收协议数据单元(Presentation Protocol Data Unit,PPDU);
在此链路上,以最大为EMLMR Supported MCS And NSS Set指示的发送空间流数(the number of Spatial Stream),发送PPDU;
执行上述介绍的内容直到frame exchange结束,在frame exchange结束后,EMLMR链路集合中其余的链路才可以收发数据。
以及可以理解的是,在EMLMR模式中进行帧交换的期间,non-AP MLD的行为本质上是将EMLMR链路集合中,其它链路的射频链(Radio Frequency Chain,RF Chain)切到进行frame exchange的链路上,以使得该链路获得EMLMR Supported MCS And NSS Set所指示的收发能力。
同样的,non-AP MLD可以给AP MLD发送EML Operating Mode Notification frame,将其中的EMLMR模式字段置为0,指示其欲去使能EMLMR模式,收到AP MLD回复的EML Operating Mode Notification frame后,可以去使能EMLMR模式。
在介绍完上述介绍的EMLSR模式以及EMLMR模式之后,还需要说明的是,对于一个non-AP MLD来说,其具体是支持EMLSR模式,还是EMLMR模式,对于non-AP MLD是一种固有的属性。因此针对一个non-AP MLD来说,其要么通过EMLSR模式字段使能EMLSR模式,要么通过EMLMR模式字段使能EMLMR模式。
在一些实施方式中,当STA处于doze状态时,周期性收取AP发送的TIM元素(element)(一般放在信标帧Beacon frame中),AP将缓存该STA的下行数据,并在TIM element中通知STA。STA收到指示后,向AP发送PS-Poll帧或QoS Null帧通知AP其唤醒,随后AP可以向该STA发送下行数据。
以下结合图5对多链路操作(Multi-Link Operation,MLO)链路信息元素(Link Information element)进行介绍。图5为本申请实施例中提供的一种MLO链路信息元素的格式示意图。
其中,元素ID、长度和元素ID扩展字段在标准9.4.2.1(常规)中定义;链路ID位图字段指示预期STA操作的链路。
以下结合图6对MAC帧格式(MAC frame format)进行介绍。图6为本申请实施例中提供的一种MAC帧格式示意图。
MAC帧包括三部分:MAC Header、帧主体(Frame body)及帧校验序列(Frame Check Sequence,FCS)。
其中,MAC Header是固定格式的,frame body是可变长度,遵循TLV(Type length value)格式。MAC Header包含MAC帧的信息。Frame Body来自网络层的数据,负责在STA间传输上层数据。FCS采用CRC校验,32位循环冗余码,通过完整性检验的帧,需接收端发送应答帧。
其中,MAC头部有帧控制(Frame Control)字段、持续时间/标识(Duration/ID)、地址1、地址2、地址3、序列控制域(Sequence Control)、地址4、QOS控制字段、高吞吐量(High-throughput,HT)控制字段。
其中,帧控制字段定义了帧的类型、子类型、从哪里发来的、电源管理、是否加密等重要状态信息,是分析Wi-Fi帧的重要字段。
持续时间/标识表明该帧和它的确认帧将会占用信道多长时间。跟有线传输不一样。在Wi-Fi的网络环境下,每个数据发送者都要轮流的使用信道才不会引起冲突。发送者在这个字段写明了它的数据发送将要占用多长的信道时间,这样可以有利于后续的发送者发送数据。
地址1表示接受者的MAC地址,地址2表示发送者的MAC地址,地址3表示Wi-Fi的BSSID,一般情况下都是AP的MAC地址,地址4一般不使用。
序列控制域主要用于过滤重复帧。
QOS控制字段:优先级控制字段,早期的标准并没有提供区分业务优先级的机制,不能为不同应用提供不同质量的接入服务,当网络发生流量拥塞时,需要优先处理的业务报文(例如语音报文)和普通报文(例如浏览网页的报文)会按相同的概率被丢弃。这个字段可以对不同的流量建立不同的优先级,保证较高优先级的数据有大概率时间被成功传输。
HT控制字段:由于从IEEE802.11n开始,MAC开始支持40M带宽,就是把原来的2个20M带宽合并一个40M带宽,这个字段为高吞吐量的数据提供一些控制。
其中,当类型字段不等于1或子类型子字段等于6时,非S1G PPDU中的帧控制字段格式包括以下信息:
1)Protocol Version:(协议版本)通常为0。
2)Type:帧类型,管理帧00,控制帧:01,数据帧10。
3)Subtype:帧的子类型,每种大类帧又分为多个小类。
4)To DS:管理帧和控制帧都是0,数据帧表示是从发往AP的。
5)From DS:管理帧和控制帧都是0,数据帧表示是从AP发来的。
6)More Fragment:用于说明长帧被分段的情况,是否还有其它的帧,如果有则该值设置为1。
7)Retry(重传域):表示该分段是先前传输分段的重发帧。
8)Power Management:表示传输帧以后,站点所采用的电源管理模式,1表示站点处于节能状态(Power save mode),0表示站点处于正常状态(active mode)。
9)More Data:表示有很多帧缓存到站中。即至少还有一个数据帧要发送给STA是设置为1。
9)Protected Frame/Reserved:位于B14比特位,为受保护或预留的比特。
10)+HTC。
在一些实施例中,如果帧主体字段包含已由加密封装算法处理的信息,则受保护帧子字段设置为1。保护帧子字段保留在子类型控制帧扩展的控制帧中。在子类型为Null、QoS Null、QoS CF Poll和QoS CF Ack+CF Poll的数据帧中,受保护帧子字段设置为0。
在一些实施例中,HT控制字段始终存在于控制包装器帧中,并且存在于由标准9.2.4.1.10中定义的帧控制字段的+HTC子字段确定的QoS数据帧、QoS空数据帧中。
在一些实施例中,HT控制字段的格式如表2所示:
表2
其中,当HT控制字段以1开始时,HT控制字段的变量类型则是超高吞吐量(Very high throughput,VHT)。AC Constraint表示反方向帧(即回应帧)是否约束在同一个TID内。1表示有约束。RDG/More PPDU用来指示是否预留了反向帧的Duration/ID。
在802.11ax中,HT控制字段有三种形式:HT变体、VHT变体和HE变体。格式如表3所示:
表3
在上述介绍内容的基础上,下面对现有技术中存在的问题进行说明。
以EMLSR模式为例,支持EMLSR模式的MLSR non-AP MLD激活MLSR模式后,其EMLSR集合中的隶属STA进入Power Save mode,当前数据传输完成,它们都进入doze状态。然而,在其中某一个STA awake并通过PS-Poll frame或QoS Null frame通知其对应的AP后,其它的STA要进入awake状态需要在EMLSR模式下发送(发送方式见前述内容),效率比较低。因此,如何跨链路指示STA切换电源管理模式(active mode或power save mode),以及如何指示在power save mode下的STA awake,是目前亟需解决的技术问题。
针对现有技术中的问题,本申请提出了一种信息指示方法,可以通过一条信令来指示一个或多个STA的电源管理模式,或通过一条信令来指示一个或多个STA在节电模式下的苏醒状态,从而可以有效降低信令负荷,提升系统效率。下面采用详细的实施例进行详细说明。
在一些可行的实施方式中,上述信息指示方法可以应用于多链路设备,本实施例中的第一多链路设备和第二多链路设备之间建立有至少两条链路。其中,第一多链路设备可以为上述介绍的non-AP MLD,第二多链路设备可以为上述介绍的AP MLD,本实施例对第一多链路设备和第二多链路设备的具体实现方式不做限制,以及对第一多链路设备和第二多链路设备之间的链路的具体个数同样不做限制,其可以根据实际需求进行选择和扩展。
下面以第一多链路设备为non-AP MLD,第二多链路设备为AP MLD为例,对上述信息指示方法进行介绍,其中,第一多链路设备包括多个STA,第二多链路设备包括多个AP。上述信息指示方法包括:
上述多个STA中的第一STA向第一AP发送第一指示信息帧,该第一指示信息帧用于指示上述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒 状态;其中,上述第一AP为第二多链路设备的多个AP中与第一STA建立有链路的AP。
示例性的,假设第一多链路设备为non-AP MLD,第二多链路设备为AP-MLD。其中,non-AP MLD有两个STA,分别是STA1、STA2;AP-MLD有两个AP,分别是AP1、AP2;STA1和AP1建立了链路1,STA2和AP2建立了链路2。在一些实施方式中,可以由STA1向AP1发送第一指示信息帧,指示STA1和/或STA2的电源管理模式为活动模式(active mode)或节电模式(power save mode)。在另一些实施方式中,可以由STA1向AP1发送第一指示信息帧,指示在节电模式下STA1和/或STA2处于awake状态。
在一些实施例中,non-AP MLD中各个STA的电源管理模式或在节电模式下的苏醒状态,由non-AP MLD来确定。
可以理解的是,若STA1向AP1发送第一指示信息帧,指示STA1和STA2的电源管理模式为active mode或power save mode,则STA2便无需再向AP1发送通知帧来告诉AP1其电源管理模式为active mode或power save mode。或者,若STA1向AP1发送第一指示信息帧,指示STA1和STA2在节电模式下处于awake状态,则STA2便无需再向AP1发送通知帧来告诉AP1其在节电模式下处于awake状态,从而可以有效的节省信令开销,提升系统效率。
本申请实施例提供的信息指示方法,可以通过一条信令来指示一个或多个STA的电源管理模式,或通过一条信令来指示一个或多个STA在节电模式下的苏醒状态,从而可以有效降低信令负荷,提升系统效率。
基于上述实施例中描述的内容,在一些实施例中,上述第一指示信息帧用于指示上述多个STA中至少一个目标STA的电源管理模式。其中,上述第一指示信息帧包括第一字段与第二字段;第一字段用于指示上述至少一个目标STA对应的链路ID,第二字段用于指示上述至少一个目标STA的电源管理模式为active mode或power save mode。
在另一些实施例中,上述第一指示信息帧用于指示上述至少一个目标STA在节电模式下处于苏醒状态。其中,上述第一指示信息帧包括第一字段,该第一字段用于指示上述至少一个目标STA对应的链路ID。
可选的,上述第一指示信息帧可以为以下帧中的任意一种:行动帧(action frame)、PS-Poll帧、QoS数据帧(QoS data frame)或QoS空数据帧(QoS Null frame);上述第二字段为第一指示信息帧的帧控制字段中的电源管理子字段。
其中,上述电源管理子字段占用1比特,该比特为1时表示STA处于power save mode,为0表示STA处于active mode。
可选的,上述第一指示信息帧可以为行动帧,上述第一字段为该行动帧的多链路操作链路信息元素中的链路ID位图子字段。
可选的,所述第一指示信息帧也为QoS数据帧或QoS空数据帧;上述第一字段为QoS数据帧或QoS空数据帧的高吞吐量控制字段的A控制子字段中的链路ID位图子字段。
可选的,上述第一指示信息帧还为以下帧中的任意一种:行动帧、PS-Poll帧、QoS 数据帧或QoS空数据帧;上述第一字段为上述第一指示信息帧的帧控制字段的预留比特位。
示例性的,本申请实施例中提供以下几种可行的实施方式:
方式一:采用action frame来指示一个或多个目标STA的电源管理模式,或者指示一个或多个处于power save mode下的目标STA awake。
可选的,可以通过上述action frame的MLO Link Information element指示STA集,该STA集可以用于确定上述一个或多个目标STA对应的链路ID。
下面结合表4对action frame的MLO Link Information element进行介绍。
表4
其中,Category属于protected EHT。
MLO Link Information element(既有element)包括Link ID Bitmap subfield,该Link ID Bitmap subfield的每一位表示不同STA所建立的Link ID。在本实施方式中,可以由MLO Link Information element中的Link ID Bitmap subfield来指示上述至少一个目标STA对应的链路ID。
其中,上述至少一个目标STA的电源管理模式由上述action frame的Frame control field的power management subfield来指示。
方式二:采用QoS data frame或QoS Null frame来指示一个或多个目标STA的电源管理模式,或者指示一个或多个处于power save mode下的目标STA awake。
可选的,可以通过QoS data frame或QoS Null frame中的高吞吐量控制字段的A控制子字段(A-Control subfield)指示STA集,该STA集可以用于确定上述一个或多个目标STA对应的链路ID。
下面结合表5对A控制子字段进行介绍。
表5
其中,A控制子字段包括Control ID subfield和Link ID Bitmap subfield,Control ID取某个值比如10,表示后续为16位Link ID Bitmap,该Link ID Bitmap subfield的每一位表示不同STA所建立的Link ID。在本实施方式中,可以由A控制子字段中的Link ID Bitmap subfield来指示上述至少一个目标STA对应的链路ID。
其中,上述至少一个目标STA的电源管理模式由上述QoS data frame或QoS Null frame的Frame control field的power management subfield来指示。
方式三:采用PS-Poll、QoS Null frame、QoS data frame中的任意一种帧来指示一个或多个目标STA的电源管理模式,或者指示一个或多个处于power save mode下的目标STA awake。
可选的,以通过上述任意一种帧的frame control field的预留比特B14指示STA集,该STA集可以用于确定上述一个或多个目标STA对应的链路ID。例如,在B14设置为1时,可以用于指示EMLSR链路集或EMLMR链路集的STA电源管理模式为Power save mode,或者用于指示所有处于power save mode下的目标STA awake。
本申请实施例提供的信息指示方法,可以通过一条信令来指示一个或多个STA的电源管理模式,或通过一条信令来指示一个或多个STA在节电模式下的苏醒状态,从而可以有效降低信令负荷,提升系统效率。
基于上述实施例中描述的内容,在一些实施例中,上述第一指示信息帧还可以用于触发上述第二多链路设备中的多个AP向上述第一多链路设备中的多个STA发送缓存单元。
示例性的,为了更好的理解本申请实施例,参照图7,图7为本申请实施例中提供的一种信息指示方法的实现示意图。
在图7中,假设第一多链路设备为non-AP MLD,第二多链路设备为AP-MLD。其中,non-AP MLD有两个STA,分别是STA1、STA2,这两个STA各自支持2空间流(Spatial Stream);AP-MLD有两个AP,分别是AP1、AP2,这两个AP分别工作在2.4GHz和5GHz,各自支持4空间流。STA1和AP1建立了链接,参照图7中的链路1;STA2和AP2建立了链接,参照图7中的链路2;链路1与链路2关联的AID为AID1。
如图7所示,假设在T1时刻,STA1检查到TIM元素中对应AID1的位置的Bit为1,则表示当前non-AP MLD有下行数据缓存在AP MLD。
假设在时刻T2,STA1抢占到空口,STA1向AP1发送第一指示信息帧。其中,若第一指示信息帧中的第一字段为1100 0000 0000 0000,则表示link1和link2awake。
在第一指示信息帧结束时刻起,等待SIFS之后收到ACK frame(确认信息),其后,AP1向STA1发送缓存单元,AP2向STA2发送缓存单元,STA1和STA2在各自的link上收到缓存单元,并从中解出属于自己的聚合MAC协议数据单元(Aggregated-MAC Protocol Data Unit,A-MPDU),并回复块确认(Block Ack,BA)。
本申请实施例提供的信息指示方法,可以通过一条信令来指示一个或多个STA在节电模式下的苏醒状态,并触发多个AP向多个STA发送缓存单元,从而可以有效降低信令负荷,提升系统效率。
在一些实施例中,在non-AP MLD的多个STA处于使能第一模式时,上述第一STA若接收到第一AP发送的第一指示信息帧对应的确认信息;则在该确认信息传输结束并等待第一时长后,处于使能第一模式的各个STA进入上述第一模式;其中,上述第一模式为EMLSR模式或EMLMR模式。
在一些实施例中,在上述第一STA向第一AP发送第一指示信息帧之后,若上述 多个STA中的第二STA接收到第二AP发送的第一帧,则该第二STA向第二AP发送上述第一帧对应的确认信息;其中,上述第二AP为AP MLD的多个AP中与第二STA建立有链路的AP。
在上述第一帧对应的确认信息传输结束并等待第二时长后,认为non-AP MLD已经将射频链切换至第二STA对应的链路。
其中,在EMLSR模式下,第一帧可以是初始控制帧,其中,初始控制帧例如可以是多用户请求发送帧(Multi-User Request To Send frame,MU-RTS),或者初始控制帧还可以是BSRP(缓冲区状态报告轮询帧,Buffer Status Report Poll frame),本实施例对EMLSR模式下的初始控制帧不做限制。其中,在EMLSR模式下,初始控制帧只能单流传输,这是因为EMLSR在多条链路监听时,每条链路只有一个射频链。
在EMLMR模式下,第一帧可以是初始帧(不局限于控制帧),其中,初始帧比如说可以是QoS Null,或者还可以是其余各种可能的初始帧,其可以根据实际需求进行选择,本实施例对EMLMR模式下的初始帧同样不做限制。
示例性的,为了更好的理解本申请实施例,参照图8,图8为本申请实施例中提供的另一种信息指示方法的实现示意图。
在图8中,假设第一多链路设备为non-AP MLD,第二多链路设备为AP-MLD。其中,non-AP MLD有两个STA,分别是STA1、STA2,这两个STA各自支持2空间流,并支持EMLSR模式;AP-MLD有两个AP,分别是AP1、AP2,这两个AP分别工作在2.4GHz和5GHz,各自支持4空间流,并支持EMLSR模式。STA1和AP1建立了链接,参照图8中的链路1(Link1);STA2和AP2建立了链接,参照图8中的链路2(Link2);Link1和Link2关联的AID为AID1。
在一些实施方式在,EMLSR模式使能可以通过交互EML Operating Mode Notificaiton frame完成。其中,EMLSR Link Bitmap为:11000000 00000000(Bit0在最前面),表示EMLSR链路集为Link1和Link2。也就是说这2个链路在EMLSR模式下都可以用于帧交换。之后,若暂时没有数据传输,STA1和STA2均进入doze状态,周期性地接收各自Link上的信标(Beacon)帧,并检查其中的TIM元素。
如图8所示,假设在T1时刻,STA1检查到TIM元素中对应AID1的位置的Bit为1,则表示当前non-AP MLD有下行数据缓存在AP MLD。
假设在时刻T2,STA1抢占到空口,STA1向AP1发送第一指示信息帧。其中,若第一指示信息帧中的第一字段为1100 0000 0000 0000,则表示link1和link2awake。
在第一指示信息帧结束时刻起,等待SIFS之后收到ACK frame(确认信息),此处的SIFS也就是上述介绍的第二时长。
在ACK frame结束时刻起转换延迟(Transition Delay)以内,non-AP MLD完成使能EMLSR模式,EMLSR Link集合为Link1和Link2,STA1和STA2同时分别监听Link1和Link2。Transition Delay也就是上述介绍的第一时长,其中,non-AP MLD可以在连接请求帧(Association Request frame)的EML能力子字段(EML Capabilities subfield)中通知AP MLD上述介绍的Transition Delay。
假设在时刻T3,STA2监听到MU-RTS Trigger Frame(也就是上述介绍的第一帧),其中有一个用户信息域(User Info field)的AID为AID1,则表示当前存在待发送给 non-AP MLD的数据。
在MU-RTS这个帧传输的结束时刻起SIFS之后,STA2在被分配的资源单元(Resource Unit)上发送清除发送(Clear To Send,CTS)帧。其中,CTS是MU-RTS对应的应答帧。
当前图8中示例性的介绍了第一帧是MU-RTS,或者图8中的第一帧还可以是BSRP,其实现方式类似,此处不再赘述。
在CTS结束时刻起SIFS之后,STA1停止监听,对应射频链(RF chain)切换到STA2,STA2就可以和AP MLD进行帧交换,比如说图8中,STA2收到AP2发出的EHT MU PPDU,解出其中属于自己的Resource Units上的2空间流中的一个A-MPDU,并回复块确认信息。
基于上述实施例中所描述的内容,本申请实施例中还提供一种信息指示装置,应用于上述第一多链路设备,包括发送模块,用于:
所述多个STA中的第一STA向第一AP发送第一指示信息帧,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态;其中,所述第一AP为第二多链路设备的多个AP中与所述第一STA建立有链路的AP。
基于上述实施例中所描述的内容,本申请实施例中还提供了一种信息指示装置,应用于上述第二多链路设备,包括接收模块,用于:
所述多个AP中的第一AP接收第一STA发送的第一指示信息帧,所述第一STA为第一多链路设备的多个STA中与所述第一AP建立有链路的STA,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态。
需要说明的是,上述发送模块及接收模块具体执行的内容可以参照上述实施例中描述的信息指示方法的各个步骤,此处不做赘述。
本申请实施例中提供的通信装置,可以通过一条信令来指示一个或多个STA的电源管理模式,或通过一条信令来指示一个或多个STA在节电模式下的苏醒状态,从而可以有效降低信令负荷,提升系统效率。
可选的,上述信息指示装置可以是芯片或芯片模组等。
关于上述实施例中描述的信息指示装置包含的各模块,其可以是软件模块,也可以是硬件模块,或者也可以部分是软件模块,部分是硬件模块。例如,对于应用于或集成于芯片的各个装置、产品,其包含的各个模块可以都采用电路等硬件的方式实现,或者,至少部分模块可以采用软件程序的方式实现,该软件程序运行于芯片内部集成的处理器,剩余的(如果有)部分模块可以采用电路等硬件方式实现;对于应用于或集成于芯片模组的各个装置、产品,其包含的各个模块可以都采用电路等硬件的方式实现,不同的模块可以位于芯片模组的同一组件(例如芯片、电路模块等)或者不同组件中,或者,至少部分模块可以采用软件程序的方式实现,该软件程运行于芯片模组内部集成的处理器,剩余(如果有)部分模块可以采用电路等硬件方式实现;对于应用于或集成于终端的各个装置、产品,其包含的模块可以都采用电路等硬件的方式实现,不同的模块可以位于终端内同一组件(例如,芯片、电路模块等)或者不同组 件中,或者至少部分模块可以采用软件程序的方式实现,该软件程序运行于终端内部集成的处理器,剩余的(如果有)部分模块可以采用电路等硬件方式实现。
进一步的,基于上述实施例中所描述的内容,本申请实施例中还提供了一种电子设备,该终端设备包括至少一个处理器和存储器;其中,存储器存储计算机执行指令;上述至少一个处理器执行存储器存储的计算机执行指令,以实现如上述信息指示方法对应的各实施例描述的内容。
为了更好的理解本申请实施例,参照图9,图9为本申请实施例中提供的一种电子设备的硬件结构示意图。该电子设备可以为上述第一多链路终端,也可以为上述第二多链路终端。
如图9所示,本实施例的电子设备90包括:处理器901以及存储器902;其中:
存储器902,用于存储计算机执行指令;
处理器901,用于执行存储器存储的计算机执行指令,以实现上述实施例中描述的方法中的各个步骤,具体可以参见前述方法实施例中的相关描述。
可选地,存储器902既可以是独立的,也可以跟处理器901集成在一起。
当存储器902独立设置时,该设备还包括总线903,用于连接所述存储器902和处理器901。
本申请实施例提供一种计算机可读存储介质,该计算机可读存储介质中存储有计算机执行指令,当处理器执行所述计算机执行指令时,实现如上实施例中描述的方法中的各个步骤。
本申请实施例提供一种计算机程序产品,包括计算机程序,该计算机程序被处理器执行时,实现如上实施例中描述的方法中的各个步骤。
在本申请所提供的几个实施例中,应该理解到,所揭露的设备和方法,可以通过其它的方式实现。例如,以上所描述的设备实施例仅仅是示意性的,例如,所述模块的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个模块可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或模块的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的模块可以是或者也可以不是物理上分开的,作为模块显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能模块可以集成在一个处理单元中,也可以是各个模块单独物理存在,也可以两个或两个以上模块集成在一个单元中。上述模块成的单元既可以采用硬件的形式实现,也可以采用硬件加软件功能单元的形式实现。
上述以软件功能模块的形式实现的集成的模块,可以存储在一个计算机可读取存储介质中。上述软件功能模块存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器执行本申请各个实施例所述方法的部分步骤。
本领域普通技术人员可以理解:实现上述各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,执行包括上述各方法实施例的步骤;而前述的存储介质包括:只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是:以上各实施例仅用以说明本申请的技术方案,而非对其限制;尽管参照前述各实施例对本申请进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (24)

  1. 一种信息指示方法,其特征在于,应用于第一多链路设备,所述第一多链路设备包括多个站点STA;所述方法包括:
    所述多个STA中的第一STA向第一接入点AP发送第一指示信息帧,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态;
    其中,所述第一AP为第二多链路设备的多个AP中与所述第一STA建立有链路的AP。
  2. 根据权利要求1所述的方法,其特征在于,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式;
    其中,所述第一指示信息帧包括第一字段与第二字段,所述第一字段用于指示所述至少一个目标STA对应的链路ID,所述第二字段用于指示所述至少一个目标STA的电源管理模式为节电模式或活动模式。
  3. 根据权利要求1所述的方法,其特征在于,所述第一指示信息帧用于指示所述至少一个目标STA在节电模式下处于苏醒状态;
    其中,所述第一指示信息帧包括第一字段,所述第一字段用于指示所述至少一个目标STA对应的链路ID。
  4. 根据权利要求2所述的方法,其特征在于,所述第一指示信息帧为以下帧中的任意一种:行动帧、省电-轮询PS-Poll帧、服务质量QoS数据帧或QoS空数据帧;
    所述第二字段为所述第一指示信息帧的帧控制字段中的电源管理子字段。
  5. 根据权利要求2或3所述的方法,其特征在于,所述第一指示信息帧为行动帧,所述第一字段为所述行动帧的多链路操作链路信息元素中的链路ID位图子字段。
  6. 根据权利要求2或3所述的方法,其特征在于,所述第一指示信息帧为QoS数据帧或QoS空数据帧;所述第一字段为所述QoS数据帧或所述QoS空数据帧的高吞吐量控制字段的A控制子字段中的链路ID位图子字段。
  7. 根据权利要求2所述的方法,其特征在于,所述第一指示信息帧为以下帧中的任意一种:行动帧、PS-Poll帧、QoS数据帧或QoS空数据帧;
    所述第一字段为所述第一指示信息帧的帧控制字段的预留比特位。
  8. 根据权利要求1所述的方法,其特征在于,所述第一指示信息帧还用于触发所述多个AP中的至少一个目标AP向与所述目标AP建立有链路的STA发送缓存单元。
  9. 根据权利要求1所述的方法,其特征在于,还包括:
    在所述第一多链路设备的多个STA处于使能第一模式时,所述第一STA接收所述第一AP发送的所述第一指示信息帧对应的确认信息;其中,在所述确认信息传输结束并等待第一时长后,处于使能第一模式的各个STA进入所述第一模式;所述第一模式为增强型多链路单射频EMLSR模式或增强型多链路多射频EMLMR模式。
  10. 一种信息指示方法,其特征在于,应用于第二多链路设备,所述第二多链路设备包括多个AP;所述方法包括:
    所述多个AP中的第一AP接收第一STA发送的第一指示信息帧,所述第一STA为第一多链路设备的多个STA中与所述第一AP建立有链路的STA,所述第一指示信 息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态。
  11. 根据权利要求10所述的方法,其特征在于,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式;
    其中,所述第一指示信息帧包括第一字段与第二字段,所述第一字段用于指示所述至少一个目标STA对应的链路ID,所述第二字段用于指示所述至少一个目标STA的电源管理模式为节电模式或活动模式。
  12. 根据权利要求10所述的方法,其特征在于,所述第一指示信息帧用于指示所述至少一个目标STA在节电模式下处于苏醒状态;
    其中,所述第一指示信息帧包括第一字段,所述第一字段用于指示所述至少一个目标STA对应的链路ID。
  13. 根据权利要求11所述的方法,其特征在于,所述第一指示信息帧为以下帧中的任意一种:行动帧、PS-Poll帧、QoS数据帧或QoS空数据帧;
    所述第二字段为所述第一指示信息帧的帧控制字段中的电源管理子字段。
  14. 根据权利要求11或12所述的方法,其特征在于,所述第一指示信息帧为行动帧,所述第一字段为所述行动帧的多链路操作链路信息元素中的链路ID位图子字段。
  15. 根据权利要求11或12所述的方法,其特征在于,所述第一指示信息帧为QoS数据帧或QoS空数据帧;所述第一字段为所述QoS数据帧或所述QoS空数据帧的高吞吐量控制字段的A控制子字段中的链路ID位图子字段。
  16. 根据权利要求11所述的方法,其特征在于,所述第一指示信息帧为以下帧中的任意一种:行动帧、PS-Poll帧、QoS数据帧或QoS空数据帧;
    所述第一字段为所述第一指示信息帧的帧控制字段的预留比特位。
  17. 根据权利要求10所述的方法,其特征在于,所述第一指示信息帧还用于触发所述多个AP中的至少一个目标AP向与所述目标AP建立有链路的STA发送缓存单元。
  18. 根据权利要求10所述的方法,其特征在于,还包括:
    在所述第一多链路设备的多个STA处于使能第一模式时,所述第一AP向所述第一STA发送所述第一指示信息帧对应的确认信息的结束时刻开始第一时长后,确定处于使能第一模式的各个STA进入所述第一模式;其中,所述第一模式为EMLSR模式或EMLMR模式。
  19. 一种信息指示装置,其特征在于,应用于第一多链路设备,所述第一多链路设备包括多个STA;所述装置包括发送模块,用于:
    所述多个STA中的第一STA向第一AP发送第一指示信息帧,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态;
    其中,所述第一AP为第二多链路设备的多个AP中与所述第一STA建立有链路的AP。
  20. 一种信息指示装置,其特征在于,应用于第二多链路设备,所述第二多链路设备包括多个AP;所述装置包括接收模块,用于:
    所述多个AP中的第一AP接收第一STA发送的第一指示信息帧,所述第一STA为第一多链路设备的多个STA中与所述第一AP建立有链路的STA,所述第一指示信息帧用于指示所述多个STA中至少一个目标STA的电源管理模式或在节电模式下的苏醒状态。
  21. 一种电子设备,其特征在于,包括:至少一个处理器和存储器;
    所述存储器存储计算机执行指令;
    所述至少一个处理器执行所述存储器存储的计算机执行指令,使得所述至少一个处理器执行如权利要求1至9任一项所述的信息指示方法。
  22. 一种电子设备,其特征在于,包括:至少一个处理器和存储器;
    所述存储器存储计算机执行指令;
    所述至少一个处理器执行所述存储器存储的计算机执行指令,使得所述至少一个处理器执行如权利要求10至18任一项所述的信息指示方法。
  23. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质中存储有计算机执行指令,当计算机执行所述计算机执行指令时,实现如权利要求1至9任一项所述的信息指示方法;
    或者,当计算机执行所述计算机执行指令时,实现如权利要求10至18任一项所述的信息指示方法。
  24. 一种计算机程序产品,包括计算机程序,其特征在于,所述计算机程序被计算机执行时,实现如权利要求1至9任一项所述的信息指示方法;
    或者,所述计算机程序被计算机执行时,实现如权利要求10至18任一项所述的信息指示方法。
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