WO2025015471A1 - Procédé de transmission de trame de données, terminal et système de communication - Google Patents

Procédé de transmission de trame de données, terminal et système de communication Download PDF

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Publication number
WO2025015471A1
WO2025015471A1 PCT/CN2023/107572 CN2023107572W WO2025015471A1 WO 2025015471 A1 WO2025015471 A1 WO 2025015471A1 CN 2023107572 W CN2023107572 W CN 2023107572W WO 2025015471 A1 WO2025015471 A1 WO 2025015471A1
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WIPO (PCT)
Prior art keywords
data frame
identification information
transmission method
roaming
mld
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PCT/CN2023/107572
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English (en)
Chinese (zh)
Inventor
董贤东
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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Publication date
Application filed by Beijing Xiaomi Mobile Software Co Ltd filed Critical Beijing Xiaomi Mobile Software Co Ltd
Priority to CN202380010137.2A priority Critical patent/CN119631472A/zh
Priority to PCT/CN2023/107572 priority patent/WO2025015471A1/fr
Publication of WO2025015471A1 publication Critical patent/WO2025015471A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a data frame transmission method, a terminal and a communication system.
  • Ultra High Reliability UHR
  • WLAN Wireless Local Area Networks
  • SNR signal-to-noise ratio
  • the low-latency service transmission mechanism will be further enhanced.
  • the station device may switch between multiple access points (AP) devices; therefore, it is necessary to provide a mechanism to support STA switching between multiple AP devices to meet the transmission requirements of UHR.
  • AP access points
  • the embodiments of the present disclosure provide a data frame transmission method, a terminal, and a communication system to provide a mechanism for supporting STA to switch between multiple AP devices.
  • an embodiment of the present disclosure provides a data frame transmission method, the method comprising:
  • the first data frame includes first identification information, and the first identification information identifies that the STA requests to wake up the receiving end in a power saving state to transmit uplink data;
  • the embodiment of the present disclosure further provides a data frame transmission method, the method comprising:
  • the receiving end receives a first data frame; wherein the first data frame includes first identification information, and the first identification information identifies that: the station device STA switches from the first AP to the second AP, and the first data frame is sent or received by the second AP.
  • an embodiment of the present disclosure further provides a terminal, wherein the terminal is a transmitting end, and the terminal includes:
  • a determination module configured to determine a first data frame; wherein the first data frame includes first identification information, and the first identification information identifies that: a station device STA switches from a first AP to a second AP, and the first data frame is sent or received by the second AP;
  • a sending module is used to send the first data frame.
  • an embodiment of the present disclosure further provides a terminal, the terminal being a receiving end, and the terminal comprising:
  • a first receiving module used for receiving a first data frame
  • the first data frame includes first identification information, and the first identification information identifies that the station device STA switches from the first AP to the second AP, and the first data frame is sent or received by the second AP.
  • an embodiment of the present disclosure further provides a terminal, which is a transmitting end and includes:
  • processors one or more processors
  • the terminal is used to execute the data frame transmission method described in the embodiment of the present disclosure.
  • an embodiment of the present disclosure further provides a terminal, which is a receiving end and includes:
  • processors one or more processors
  • the terminal is used to execute the data frame transmission method described in the embodiment of the present disclosure.
  • the embodiments of the present disclosure also provide a communication system, including a transmitting end and a receiving end; wherein the transmitting end is configured to implement the data frame transmission method described in the embodiments of the present disclosure, and the receiving end is configured to implement the data frame transmission method described in the embodiments of the present disclosure.
  • the embodiments of the present disclosure also provide a storage medium storing instructions.
  • the communication device executes the data frame transmission method described in the embodiments of the present disclosure, or executes the data frame transmission method described in the embodiments of the present disclosure.
  • the first identification information is carried during the transmission of data frames, and the data transmission direction after switching is indicated in real time through the first identification information. There is no additional authentication or request or response process, thereby minimizing the delay caused by the switching; and the switching process does not introduce a new message interaction process, thereby avoiding data interruption caused by the new message interaction process.
  • FIG1 is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure
  • FIG2 is one of an exemplary interaction diagrams of a method provided according to an embodiment of the present disclosure.
  • FIG3 is a second exemplary interaction diagram of a method provided according to an embodiment of the present disclosure.
  • FIG4 is a third exemplary interaction diagram of a method provided according to an embodiment of the present disclosure.
  • FIG5 is a schematic diagram of a flow chart of a data frame transmission method according to an embodiment of the present disclosure
  • FIG6 is a second flow chart of a data frame transmission method provided in an embodiment of the present disclosure.
  • FIG7 is a schematic diagram of a structure of a terminal according to an embodiment of the present disclosure.
  • FIG8 is a second schematic diagram of the structure of the terminal proposed in the embodiment of the present disclosure.
  • FIG9 is a third schematic diagram of the structure of the terminal proposed in the embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure.
  • the embodiments of the present disclosure provide a data frame transmission method, a terminal, and a communication system.
  • an embodiment of the present disclosure provides a data frame transmission method, the method comprising:
  • the transmitting end determines a first data frame; wherein the first data frame includes first identification information, and the first identification information identifies that: the station device STA switches from the first AP to the second AP, and the first data frame is sent or received by the second AP;
  • the first data frame is sent.
  • the station device STA switches (or roams) from the first AP to the second AP, the second AP sends or receives the first data frame, and seamlessly switches to AP2 for data communication, so that data transmission is uninterrupted.
  • the first data frame includes a control field, and the first identification information is carried in the control field.
  • a control field may be carried in the Media Access Control (MAC) frame header part of the first data frame, and first identification information may be carried in the control field to identify that the first data frame is sent or received by the second AP after the STA is switched.
  • MAC Media Access Control
  • the first identification information includes at least one of the following:
  • the first identification information includes at least one of the above.
  • the identification information of the second AP includes: a Roaming AP ID or a Roaming AP MLD ID;
  • the Roaming AP MLD ID identifier is the ID identifier of the AP MLD to which the second AP is attached.
  • the identification information of the second AP is used to identify that the first data frame will be sent to the AP indicated by the identification, or the first data frame will be sent by the AP indicated by the identification;
  • the identification information of the second AP can be the MAC address information or the association identifier (Association Identifier, AID) of the second AP; if the second AP is affiliated with AP MLD, the identification information of the second AP is the ID identifier of the AP MLD, such as the MAC address information of the AP MLD.
  • the link bitmap identification information is set to a first parameter value
  • the AP of the link corresponding to the link bitmap identification information is identified as the second AP.
  • the AP of the link whose link bitmap identification information is set to 1 is the second AP; for example, when there are multiple optional second APs, the specific second AP can be indicated by the link bitmap identification.
  • the NSS identification information identifies the spatial stream quantity information of the first data frame.
  • the NSS identification information identifies the number of spatial streams used by the first data frame, so that the second AP or STA can receive the first data frame according to the number of spatial streams.
  • the MCS identification information identifies a modulation and coding mode of the first data frame.
  • the MCS identification information identifies the modulation and coding mode adopted by the first data frame, so that the second AP or STA can receive the first data frame according to the modulation and coding mode.
  • the roam type identification information identifies that the switching operation of the STA from the first AP to the second AP is link-level roaming or MLD-level roaming.
  • link-level roaming for example, the first AP and the second AP are affiliated to the same AP MLD, and the STA is switched from the working link of AP1 to the working link of AP2; MLD-level roaming, link-level roaming, for example, the first AP and the second AP are not affiliated to the same AP MLD, and the STA is switched from the AP MLD to which AP1 is affiliated to to the AP MLD to which AP2 is affiliated.
  • the content of the roam type identification information is carried in the extended capabilities information element or UHR operation information element sent by the STA during the initial association process.
  • STA non-AP MLD
  • AP AP MLD
  • STA and AP may carry roam type identification information during the initial association process to indicate the switch to link-level roaming or MLD-level roaming.
  • the identification bit may be used in the extended capabilities information element or UHR operation information element sent during the initial association process.
  • an embodiment of the present disclosure provides a data frame transmission method, the method comprising:
  • the receiving end receives a first data frame; wherein the first data frame includes first identification information, and the first identification information identifies that: the station device STA switches from the first AP to the second AP, and the first data frame is sent or received by the second AP.
  • the first data frame includes a control field, and the first identification information is carried in the control field.
  • the first identification information includes at least one of the following:
  • the identification information of the second AP includes: a Roaming AP ID or a Roaming AP MLD ID;
  • the Roaming AP MLD ID identifier is the ID identifier of the AP MLD to which the second AP is attached.
  • the link bitmap identification information is set to a first parameter value, identifying the AP of the link corresponding to the link bitmap identification information as the second AP.
  • the NSS identification information identifies the spatial stream quantity information of the first data frame.
  • the MCS identification information identifies a modulation and coding mode of the first data frame.
  • the roam type identification information identifies that the switching operation of the STA from the first AP to the second AP is link-level roaming or MLD-level roaming.
  • the content of the roam type identification information is carried in an extended capabilities information element or a UHR operation information element sent by the STA during an initial association process.
  • an embodiment of the present disclosure further provides a terminal, which is a transmitting end, and the transmitting end includes at least one of a determining module and a transmitting module; wherein the transmitting end is used to execute an optional implementation method of the first aspect.
  • an embodiment of the present disclosure further provides a terminal, which is a receiving end and includes: a first receiving module; wherein the above-mentioned receiving end is used to execute the optional implementation method of the second aspect.
  • an embodiment of the present disclosure further provides a terminal, which is a transmitting end and includes:
  • processors one or more processors
  • the terminal is used to execute the optional implementation of the first aspect.
  • an embodiment of the present disclosure further provides a terminal, where the terminal is a receiving end, including:
  • processors one or more processors
  • the terminal is used to execute the optional implementation of the second aspect.
  • an embodiment of the present disclosure further provides a communication system, comprising a transmitting end and a receiving end; wherein the transmitting end is configured to execute the optional implementation method as described in the first aspect, and the receiving end is configured to execute the optional implementation method as described in the second aspect.
  • an embodiment of the present disclosure further provides a storage medium storing instructions, which, when executed on a communication device, enables the communication device to execute the optional implementation methods described in the first and second aspects.
  • an embodiment of the present disclosure proposes a program product.
  • the communication device executes the method described in the optional implementation manner of the first aspect and the second aspect.
  • an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first aspect and the second aspect.
  • an embodiment of the present disclosure provides a chip or a chip system, which includes a processing circuit configured to execute the method described in the optional implementation of the first aspect and the second aspect.
  • the embodiments of the present disclosure provide a data frame transmission method, a terminal and a communication system.
  • the data frame transmission method and the signal transmission method, the wireless frame transmission method and the like terms can be interchangeable, and the information processing system, the communication system and the like terms can be interchangeable.
  • each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined.
  • a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged.
  • the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.
  • plurality refers to two or more.
  • the terms "at least one of”, “one or more”, “a plurality of”, “multiple”, etc. can be used interchangeably.
  • "at least one of A and B", “A and/or B", “A in one case, B in another case”, “in response to one case A, in response to another case B”, etc. may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.
  • the description method such as "A or B” may include the following technical solutions according to the situation: In some embodiments, A (with In some embodiments, A is executed independently of B; in some embodiments, B is executed independently of A; in some embodiments, A and B are selected for execution. When there are more branches such as A, B, C, etc., the above is also similar.
  • prefixes such as “first” and “second” in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, quantity or content of the description objects.
  • the statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute unnecessary restrictions due to the use of prefixes.
  • the description object is a "field”
  • the ordinal number before the "field” in the "first field” and the "second field” does not limit the position or order between the "fields”
  • the "first” and “second” do not limit whether the "fields” they modify are in the same message, nor do they limit the order of the "first field” and the "second field”.
  • the description object is a "level”
  • the ordinal number before the "level” in the “first level” and the “second level” does not limit the priority between the "levels”.
  • the number of description objects is not limited by the ordinal number, and can be one or more. Taking the "first device” as an example, the number of "devices” can be one or more.
  • the objects modified by different prefixes may be the same or different. For example, if the description object is "device”, then the “first device” and the “second device” may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information”, then the "first information” and the “second information” may be the same information or different information, and their contents may be the same or different.
  • “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.
  • terms such as “greater than”, “greater than or equal to”, “not less than”, “more than”, “more than or equal to”, “not less than”, “higher than”, “higher than or equal to”, “not lower than”, and “above” can be replaced with each other, and terms such as “less than”, “less than or equal to”, “not greater than”, “less than”, “less than or equal to”, “no more than”, “lower than”, “lower than or equal to”, “not higher than”, and “below” can be replaced with each other.
  • devices and equipment may be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they may also be understood as “equipment”, “device”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, “subject”, etc.
  • network can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.
  • acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.
  • data, information, etc. may be obtained with the user's consent.
  • each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns may also be implemented as an independent embodiment.
  • FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.
  • a communication system 100 includes a transmitting end 101 and a receiving end 102 .
  • the station device (Station, STA) is the sending end 101, and the access point device (Access Point, AP) is the receiving end 102; when the first data frame is a downlink data frame, the station device is the receiving end 101, and the access point device is the sending end 102.
  • the site equipment includes, for example, a wireless communication chip, a wireless sensor, or a wireless communication terminal that supports WiFi communication function.
  • the wireless communication terminal is, for example, a mobile phone, a wearable device, an Internet of Things device that supports WiFi communication function, a car with WiFi communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid (smart grid), a wireless terminal device in transportation safety (transportation safety), a wireless terminal device in a smart city (smart city), and a wireless terminal device in a smart home (smart home), but is not limited thereto.
  • the site device may be a terminal device or a network device with a wireless fidelity (WiFi) chip.
  • the site device may support multiple WLAN standards such as 802.11ax, 802.11be, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a, and support the next generation 802.11 protocol, but is not limited thereto.
  • the access point device can be an access point for a mobile terminal to enter a wired network.
  • AP is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect various wireless network clients together and then connect the wireless network to the Ethernet.
  • the AP can be a terminal device or a network device with a wireless fidelity chip.
  • the AP can support multiple WLAN standards such as 802.11ax, 802.11be, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a, as well as support the next generation 802.11 protocol, but is not limited to this.
  • the AP and the STA may be devices supporting multiple connections, for example, they may be represented as a multi-connection access point device (Access Point Multi-Link Device, AP MLD) and a multi-connection station device (Non-Access Point Multi-Link Device, Non ... Multi-Link Device, Non-AP MLD); AP MLD can represent an access point that supports multi-link communication functions, and non-AP MLD can represent a site that supports multi-link communication functions.
  • AP MLD can represent an access point that supports multi-link communication functions
  • non-AP MLD can represent a site that supports multi-link communication functions.
  • the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure.
  • a person of ordinary skill in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.
  • the following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or part of the subject, but are not limited thereto.
  • the subjects shown in FIG1 are examples, and the communication system may include all or part of the subjects in FIG1 , or may include other subjects other than FIG1 , and the number and form of each subject are arbitrary, and each subject may be physical or virtual, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, and may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.
  • a wireless local area network such as a local area network using the 802.11 series of protocols.
  • a basic service set (BSS) is a basic component of a WLAN.
  • a BSS network is composed of station devices with some association within a specific coverage area.
  • IBSS independent BSS
  • Another more common case is that there is only one central station in the BSS network that is dedicated to managing the BSS, which is called an access point device, and all other STAs in the network are associated with it.
  • STAs Other stations in the BSS network that are not central stations are called terminals, also called non-AP STAs, and terminals and non-AP STAs are collectively referred to as STAs.
  • terminals also called non-AP STAs
  • STAs terminals and non-AP STAs
  • a STA cannot detect other STAs that are far away from it, and the two are hidden nodes of each other.
  • FIG2 is one of the interactive schematic diagrams of the data frame transmission method according to an embodiment of the present disclosure. As shown in FIG2 , the method includes:
  • Step 201 the transmitting end 101 determines a first data frame; wherein the first data frame includes first identification information, and the first identification information identifies that the station device STA switches from the first AP to the second AP, and the first data frame is sent or received by the second AP
  • the low-latency service transmission mechanism will be further enhanced.
  • the AP may be an AP MLD.
  • the present disclosure embodiment will be introduced using AP as an example, but this does not constitute a limitation on the embodiment of the present disclosure.
  • STA may switch between multiple AP devices. For example, when the location of STA changes, while STA is communicating with AP1 for low-latency services or communicating with AP1 for low-latency services (such as Tunneled Direct Link Setup services) through the management of AP1, it needs to switch to AP2 to continue the transmission of low-latency services; or, when STA is communicating data with AP1, when STA roams from the coverage of AP1 to the coverage of AP2, the quality of the communication link with AP1 deteriorates, then STA seamlessly switches to AP2 for data communication, so that data transmission is uninterrupted.
  • AP1 for low-latency services
  • AP1 for low-latency services such as Tunneled Direct Link Setup services
  • the transmitter 101 determines a first data frame, carries first identification information in the first data frame, and identifies through the first identification information: the first data frame includes the first identification information, and the first identification information identifies: the station device STA switches (or roams) from the first AP to the second AP, and the first data frame is sent or received by the second AP.
  • the second AP is the target AP of the station device switching; optionally, the first AP can be the AP that currently maintains a communication connection with the STA, and the second AP can have multiple.
  • Step 202 The sending end 101 sends the first data frame.
  • the transmitting end 101 sends the first data frame to the receiving end.
  • the first data frame carries first identification information, indicating that the STA is about to switch to the second AP, and the first data frame is sent or received by the second AP.
  • the transmitting end 101 is the STA and the receiving end 102 is the second AP. That is to say, after the STA switches, the second AP after switching continues to receive the uplink data frame (i.e., the first data frame); when the first data frame is a downlink data frame, the transmitting end 101 is the second AP and the receiving end 102 is the STA. After the STA switches, the second AP after switching continues to send downlink data (i.e., the first data frame); in this way, after the STA switches, data interruption can be avoided to meet the UHR requirements for transmission rate and the low-latency service requirements for latency.
  • Step 203 The receiving end 102 receives the first data frame.
  • the STA can switch to another AP for communication, so that data transmission is uninterrupted; for example, when the communication status with the first AP changes, the STA switches to the second AP.
  • fast transition (FT) or BSS transition management (BTM) mechanisms are difficult to achieve continuous data flow during the switching process.
  • the FT mechanism requires a re-authentication process, and the re-authentication process may Data interruption is prone to occur.
  • BTM requires request and response processes, and is mainly used in the switching between two different physical APs, or the switching between two APs attached to different AP MLDs. It is also difficult to ensure that data is transmitted continuously between different APs (or AP MLDs).
  • the first identification information is carried during the transmission of data frames, and the data transmission direction after switching is indicated in real time through the first identification information. There is no additional authentication or request or response process, thereby minimizing the delay caused by the switching; and the switching process does not introduce a new message interaction process, thereby avoiding data interruption caused by the new message interaction process.
  • the first identification information includes: the first data frame includes a control field, and the first identification information is carried in the control field.
  • a control field can be carried in the media access control layer (MAC) frame header part of the first data frame, and the first identification information can be carried in the control field to identify that the first data frame is sent or received by the second AP after the STA is switched.
  • MAC media access control layer
  • the first identification information includes at least one of the following, that is, one or more of the following information:
  • MCS Modulation and Coding Scheme
  • the first identification information includes at least one of the foregoing.
  • the identification information of the second AP includes: a roaming AP ID or a roaming AP MLD ID;
  • the Roaming AP MLD ID identifier is the ID identifier of the AP MLD to which the second AP is attached.
  • the identification information of the second AP is used to identify that the first data frame will be sent to the AP indicated by the identification, or the first data frame will be sent by the AP indicated by the identification;
  • the identification information of the second AP can be the MAC address information or the association identifier (Association Identifier, AID) of the second AP; if the second AP is affiliated with AP MLD, the identification information of the second AP is the ID identifier of the AP MLD, such as the MAC address information of the AP MLD.
  • the link bitmap identification information is set to a first parameter value, identifying the AP of the link corresponding to the link bitmap identification information as the second AP.
  • the AP of the link with the link bitmap identification information set to 1 is the second AP; for example, when there are multiple optional second APs, the specific second AP can be indicated by the link bitmap identification.
  • the NSS identification information identifies the number of spatial streams of the first data frame.
  • the NSS identification information identifies the number of spatial streams used by the first data frame, so that the second AP or STA can receive the first data frame according to the number of spatial streams.
  • the MCS identification information identifies a modulation and coding scheme of the first data frame.
  • the MCS identification information identifies the modulation and coding mode adopted by the first data frame, so that the second AP or STA can receive the first data frame according to the modulation and coding mode.
  • the roam type identification information identifies that the switching operation of the STA from the first AP to the second AP is link-level roaming or MLD-level roaming.
  • link-level roaming for example, the first AP and the second AP belong to the same AP MLD, and the STA switches from the working link of AP1 to the working link of AP2;
  • MLD-level roaming, link-level roaming, for example, the first AP and the second AP are not affiliated with the same AP MLD, and the STA switches from the AP MLD to which AP1 belongs to to the AP MLD to which AP2 belongs.
  • the content of the roam type identification information is carried in the extended capabilities information element or UHR operation information element sent by the STA during the initial association process.
  • STA non-AP MLD
  • AP AP MLD
  • STA and AP can carry roam type identification information during the initial association process, indicating the switch to link-level roaming or MLD-level roaming.
  • the identification bit can be used in the extended capabilities information element or UHR operation information element sent during the initial association process.
  • FIG3 is a second interactive schematic diagram of a data frame transmission method according to an embodiment of the present disclosure, and FIG3 shows a scenario where the first data frame is an uplink data frame. As shown in FIG3 , the method includes:
  • Step 301 STA-30 determines an uplink data frame; wherein the uplink data frame includes first identification information, the first identification information identifies: the station device STA switches from the first AP to the second AP, and the uplink data frame is received by the second AP
  • STA-30 determines an uplink data frame, carries first identification information in the uplink data frame, and identifies through the first identification information: the uplink data frame includes the first identification information, and the first identification information identifies: the site device STA switches (or roams) from the first AP to the second AP, and the uplink data frame is received by the second AP.
  • the second AP is the target AP for the site device to switch; optionally, the first AP can be the AP that currently maintains a communication connection with the STA, and the second AP can have multiple.
  • Step 302 STA-30 sends the uplink data frame.
  • the STA-30 sends the uplink data frame to the second AP-31, and the uplink data frame carries the first identification information, indicating that the STA is about to switch to the second AP, and the uplink data frame is received by the second AP. In this way, after the STA switches, data interruption can be avoided to meet the UHR requirements for transmission rate and the low-latency service requirements for latency.
  • Step 303 The second AP-31 receives the uplink data frame.
  • the STA can switch to another AP for communication, so that data transmission is uninterrupted; for example, when the communication status with the first AP changes, the STA switches to the second AP.
  • the fast transition (FT) or BSS transition management (BTM) mechanisms are both difficult to achieve continuous data flow during the switching process.
  • the FT mechanism requires a re-authentication process, and data flow interruption is prone to occur during the re-authentication process.
  • BTM requires a request and response process, and is mainly used in the switching of two different physical entity APs, or the switching between two APs attached to different AP MLDs. It is also difficult to ensure that data is transmitted continuously between different APs (or AP MLDs).
  • the first identification information is carried during the transmission of data frames, and the data transmission direction after switching is indicated in real time through the first identification information. There is no additional authentication or request or response process, thereby minimizing the delay caused by the switching; and the switching process does not introduce a new message interaction process, thereby avoiding data interruption caused by the new message interaction process.
  • the first identification information includes: the uplink data frame includes a control field, and the first identification information is carried in the control field.
  • a control field can be carried in the media access control layer (Media Access Control, MAC) frame header part of the uplink data frame, and the first identification information is carried in the control field to identify that the uplink data frame is received by the second AP after the STA is switched.
  • Media Access Control Media Access Control
  • the first identification information includes at least one of the following, that is, one or more of the following information:
  • MCS Modulation and Coding Scheme
  • the first identification information includes at least one of the foregoing.
  • the identification information of the second AP includes: a roaming AP ID or a roaming AP MLD ID;
  • the Roaming AP MLD ID identifier is the ID identifier of the AP MLD to which the second AP is attached.
  • the identification information of the second AP is used to identify the AP indicated by the identification to which the uplink data frame will be sent; the identification information of the second AP can be the MAC address information or the association identifier (AID) of the second AP; if the second AP is affiliated with AP MLD, the identification information of the second AP is the ID identifier of the AP MLD, such as the MAC address information of the AP MLD.
  • the link bitmap identification information is set to a first parameter value, identifying the AP of the link corresponding to the link bitmap identification information as the second AP.
  • the first parameter value is, for example, 1, and the AP of the link with the link bitmap identification information set to 1 is the second AP; for example, when there are multiple optional second APs, the specific second AP can be indicated by the link bitmap identification.
  • the NSS identification information identifies the spatial stream quantity information of the uplink data frame.
  • the NSS identification information identifies the number of spatial streams used in the uplink data frame, so that the second AP or STA can receive the uplink data frame according to the number of spatial streams.
  • the MCS identification information identifies the modulation and coding mode of the uplink data frame.
  • the MCS identification information identifies the modulation and coding mode adopted by the uplink data frame, so that the second AP or STA can receive the uplink data frame according to the modulation and coding mode.
  • the roam type identification information identifies that the switching operation of the STA from the first AP to the second AP is link-level roaming or MLD-level roaming.
  • link-level roaming for example, the first AP and the second AP belong to the same AP MLD, and the STA switches from the working link of AP1 to the working link of AP2;
  • MLD-level roaming, link-level roaming, for example, the first AP and the second AP are not affiliated with the same AP MLD, and the STA switches from the AP MLD to which AP1 belongs to to the AP MLD to which AP2 belongs.
  • the content of the roam type identification information is carried in the extended capabilities information element or UHR operation information element sent by the STA during the initial association process.
  • STA non-AP MLD
  • AP AP MLD
  • STA and AP can carry roam type identification information during the initial association process, and the identification is switched to link-level roaming or MLD-level roaming.
  • the identification bit can be used in the extended capabilities information element or UHR operation information element sent during the initial association process.
  • FIG4 is a second interactive schematic diagram of a data frame transmission method according to an embodiment of the present disclosure, and FIG4 shows a scenario where the first data frame is a downlink data frame. As shown in FIG4 , the method includes:
  • Step 401 the second AP-31 determines a downlink data frame; wherein the downlink data frame includes first identification information, the first identification information identifies: the station device STA-30 switches from the first AP to the second AP-31, and the downlink data frame is sent by the second AP-31
  • the second AP-31 determines a downlink data frame, carries first identification information in the downlink data frame, and identifies through the first identification information: the downlink data frame includes the first identification information, and the first identification information identifies: the site device STA switches (or roams roam) from the first AP to the second AP, and the downlink data frame is sent by the second AP.
  • the second AP is the target AP for the site device to switch; optionally, the first AP can be the AP that currently maintains a communication connection with the STA, and the second AP can have multiple.
  • Step 402 The second AP-31 sends the downlink data frame.
  • the second AP-31 sends the downlink data frame to STA-30, carrying the first identification information in the downlink data frame, indicating that the STA is about to switch to the second AP, and the downlink data frame is sent by the second AP. In this way, after the STA switches, data interruption can be avoided to meet the UHR requirements for transmission rate and the low-latency service requirements for latency.
  • Step 403 STA-30 receives the downlink data frame.
  • the STA can switch to another AP for communication, so that data transmission is uninterrupted; for example, when the communication status with the first AP changes, the STA switches to the second AP.
  • the fast transition (FT) or BSS transition management (BTM) mechanisms are both difficult to achieve continuous data flow during the switching process.
  • the FT mechanism requires a re-authentication process, and data flow interruption is prone to occur during the re-authentication process.
  • BTM requires a request and response process, and is mainly used in the switching of two different physical entity APs, or the switching between two APs attached to different AP MLDs. It is also difficult to ensure that data is transmitted continuously between different APs (or AP MLDs).
  • the first identification information is carried during the transmission of data frames, and the data transmission direction after switching is indicated in real time through the first identification information. There is no additional authentication or request or response process, thereby minimizing the delay caused by the switching; and the switching process does not introduce a new message interaction process, thereby avoiding data interruption caused by the new message interaction process.
  • the first identification information includes: the downlink data frame includes a control field, and the first identification information is carried in the control field.
  • a control field may be carried in a media access control layer (MAC) frame header portion of the downlink data frame, and first identification information may be carried in the control field to identify that the downlink data frame is sent by the second AP after the STA is switched.
  • MAC media access control layer
  • the first identification information includes at least one of the following, that is, one or more of the following information:
  • MCS Modulation and Coding Scheme
  • the first identification information includes at least one of the foregoing.
  • the identification information of the second AP includes: a roaming AP ID or a roaming AP MLD ID;
  • the Roaming AP MLD ID identifier is the ID identifier of the AP MLD to which the second AP is attached.
  • the identification information of the second AP is used for the downlink data frame to be sent by the AP indicated by the identification;
  • the identification information of the second AP can be the MAC address information or the association identifier (Association Identifier, AID) of the second AP; if the second AP is affiliated with AP MLD, the identification information of the second AP is the ID identifier of the AP MLD, such as the MAC address information of the AP MLD.
  • the link bitmap identification information is set to a first parameter value, identifying the AP of the link corresponding to the link bitmap identification information as the second AP.
  • the AP of the link with the link bitmap identification information set to 1 is the second AP; for example, when there are multiple optional second APs, the specific second AP can be indicated by the link bitmap identification.
  • the NSS identification information identifies the spatial stream quantity information of the downlink data frame.
  • the NSS identification information identifies the number of spatial streams used in the downlink data frame, so that the second AP or STA can receive the downlink data frame according to the number of spatial streams.
  • the MCS identification information identifies the modulation and coding mode of the downlink data frame.
  • the MCS identification information identifies the modulation and coding mode adopted by the downlink data frame, so that the second AP or STA can receive the downlink data frame according to the modulation and coding mode.
  • the roam type identification information identifies that the switching operation of the STA from the first AP to the second AP is link-level roaming or MLD-level roaming.
  • link-level roaming for example, the first AP and the second AP belong to the same AP MLD, and the STA switches from the working link of AP1 to the working link of AP2;
  • MLD-level roaming, link-level roaming, for example, the first AP and the second AP are not affiliated with the same AP MLD, and the STA switches from the AP MLD to which AP1 belongs to to the AP MLD to which AP2 belongs.
  • the content of the roam type identification information is carried in the extended capabilities information element or UHR operation information element sent by the STA during the initial association process.
  • STA non-AP MLD
  • AP AP MLD
  • STA and AP can carry roam type identification information during the initial association process, and the identification is switched to link-level roaming or MLD-level roaming.
  • the identification bit can be used in the extended capabilities information element or UHR operation information element sent during the initial association process.
  • the names of information, etc. are not limited to the names recorded in the embodiments, and terms such as “information”, “message”, “signal”, “signaling”, “report”, “configuration”, “indication”, “instruction”, “command”, “channel”, “parameter”, “domain”, “field”, “codepoint”, “bit”, “data”, “program”, and “chip” can be used interchangeably.
  • terms such as “moment”, “time point”, “time”, and “time position” can be interchangeable, and terms such as “duration”, “period”, “time window”, “window”, and “time” can be interchangeable.
  • wireless access scheme and waveform may be used interchangeably.
  • terms such as “certain”, “preset”, “preset”, “set”, “indicated”, “some”, “any”, and “first” can be interchangeable, and "specific A”, “preset A”, “preset A”, “set A”, “indicated A”, “some A”, “any A”, and “first A” can be interpreted as A pre-defined in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., and can also be interpreted as specific A, some A, any A, or first A, etc., but is not limited to this.
  • the determination or judgment can be performed by a value represented by 1 bit (0 or 1), by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values (for example, comparison with a predetermined value), but is not limited to this.
  • not expecting to receive can be interpreted as not receiving on time domain resources and/or frequency domain resources, or as not performing subsequent processing on the data after receiving the data; "not expecting to send” can be interpreted as not sending, or as sending but not expecting the recipient to respond to the sent content.
  • step 201 can be implemented as an independent embodiment
  • step 202 can be implemented as an independent embodiment
  • step 203 can be implemented as an independent embodiment
  • step 301 can be implemented as an independent embodiment
  • step 302 can be implemented as an independent embodiment
  • step 303 can be implemented as an independent embodiment
  • step 401 can be implemented as an independent embodiment
  • step 402 can be implemented as an independent embodiment
  • step 403 can be implemented as an independent embodiment
  • the combination of step 201 and step 202 can be implemented as an independent embodiment
  • the combination of step 202 and step 203 can be implemented as an independent embodiment
  • the combination of step 301 and step 302 can be implemented as an independent embodiment
  • the combination of step 302 and step 303 can be implemented as an independent embodiment
  • the combination of step 401 and step 402 can be implemented as an independent embodiment
  • the combination of step 402 and step 403 can be implemented as an independent embodiment but is not limited thereto.
  • FIG. 5 is one of the flowchart diagrams of the data frame transmission method according to an embodiment of the present disclosure.
  • the above method may be applied to the sending end 101, and the above method includes:
  • Step 501 The transmitting end determines a first data frame; wherein the first data frame includes first identification information, and the first identification information identifies that a station device STA switches from a first AP to a second AP, and the first data frame is sent or received by the second AP;
  • Step 502 Send the first data frame.
  • the first data frame includes a control field, and the first identification information is carried in the control field.
  • the first identification information includes at least one of the following:
  • the identification information of the second AP includes: a Roaming AP ID identification or a Roaming AP MLD ID identification;
  • the Roaming AP MLD ID identifier is the ID identifier of the AP MLD to which the second AP is attached.
  • the link bitmap identification information is set to a first parameter value, identifying the AP of the link corresponding to the link bitmap identification information as the second AP.
  • the NSS identification information identifies information about the number of spatial streams of the first data frame.
  • the MCS identification information identifies a modulation and coding mode of the first data frame.
  • the roam type identification information indicates that the switching operation of the STA from the first AP to the second AP is link-level roaming or MLD-level roaming.
  • the content of the roam type identification information is carried in an extended capabilities information element or a UHR operation information element sent by the STA during the initial association process.
  • step 501 may be implemented as an independent embodiment
  • step 502 may be implemented as an independent embodiment
  • the combination of step 501 and step 502 may be implemented as an independent embodiment, but is not limited thereto.
  • FIG. 6 is a second flowchart of a data frame transmission method according to an embodiment of the present disclosure.
  • the method is applied to a receiving end 102, and the method includes:
  • Step 601 receiving a first data frame; wherein the first data frame includes first identification information, and the first identification information identifies that a station device STA switches from a first AP to a second AP, and the first data frame is sent or received by the second AP.
  • the first data frame includes a control field, and the first identification information is carried in the control field. middle.
  • the first identification information includes at least one of the following:
  • the identification information of the second AP includes: a Roaming AP ID identification or a Roaming AP MLD ID identification;
  • the Roaming AP MLD ID identifier is the ID identifier of the AP MLD to which the second AP is attached.
  • the link bitmap identification information is set to a first parameter value, identifying the AP of the link corresponding to the link bitmap identification information as the second AP.
  • the NSS identification information identifies information about the number of spatial streams of the first data frame.
  • the MCS identification information identifies a modulation and coding mode of the first data frame.
  • the roam type identification information indicates that the switching operation of the STA from the first AP to the second AP is link-level roaming or MLD-level roaming.
  • the content of the roam type identification information is carried in an extended capabilities information element or a UHR operation information element sent by the STA during the initial association process.
  • the embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device is proposed, the above device includes a unit or module for implementing each step performed by the terminal in any of the above methods.
  • a device is also proposed, including a unit or module for implementing each step performed by a network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.
  • a network device such as an access network device, a core network function node, a core network device, etc.
  • the division of the units or modules in the above device is only a division of logical functions, which can be fully or partially integrated into one physical entity or physically separated in actual implementation.
  • the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and instructions are stored in the memory.
  • the processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory inside the device or a memory outside the device.
  • CPU central processing unit
  • microprocessor a microprocessor
  • the units or modules in the device may be implemented in the form of hardware circuits, and the functions of some or all of the units or modules may be implemented by designing the hardware circuits.
  • the hardware circuits may be understood as one or more processors; for example, in one implementation, the hardware circuits are application-specific integrated circuits (ASICs), and the functions of some or all of the above units or modules may be implemented by designing the logical relationship of the components in the circuits; for another example, in another implementation, the hardware circuits may be implemented by programmable logic devices (PLDs), and Field Programmable Gate Arrays (FPGAs) may be used as an example, which may include a large number of logic gate circuits, and the connection relationship between the logic gate circuits may be configured by configuring the configuration files, thereby implementing the functions of some or all of the above units or modules. All units or modules of the above devices may be implemented in the form of software called by the processor, or in the form of hardware circuits, or in the form of software called by the processor, and the remaining part may be implemented in
  • the processor is a circuit with signal processing capability.
  • the processor may be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit may be fixed or reconfigurable, such as a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA.
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the process of the processor loading a configuration document to implement the hardware circuit configuration may be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules.
  • it can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as Neural Network Processing Unit (NPU), Tensor Processing Unit (TPU), Deep Learning Processing Unit (DPU), etc.
  • ASIC Neural Network Processing Unit
  • NPU Neural Network Processing Unit
  • TPU Tensor Processing Unit
  • DPU Deep Learning Processing Unit
  • Fig. 7 is a schematic diagram of the structure of a transmitting end proposed in an embodiment of the present disclosure.
  • the transmitting end 700 may include: at least one of a determining module 701, a sending module 702, and the like.
  • the above-mentioned determination module 701 is used to determine a first data frame; wherein the first data frame includes first identification information, and the first identification information identifies: the station device STA switches from the first AP to the second AP, and the second AP sends or Receive the first data frame; Sending module 702, send the first data frame.
  • the determination module 701 is used to execute at least one of the communication steps (such as step 201, step 301, step 401, step 501, but not limited thereto) executed by the sending end 101 in any of the above methods, which will not be described in detail here.
  • the sending module 702 is used to execute at least one of (such as step 202, step 302, step 402, step 502, but not limited thereto).
  • Fig. 8 is a schematic diagram of the structure of a receiving end proposed in an embodiment of the present disclosure.
  • a receiving end 800 may include: a first receiving module 801 .
  • the first receiving module 801 is configured to receive a first data frame
  • the first data frame includes first identification information, and the first identification information identifies that the station device STA switches from the first AP to the second AP, and the first data frame is sent or received by the second AP.
  • the first receiving module 801 is used to execute at least one of the communication steps (such as step 203, step 303, step 403, step 601, but not limited thereto) performed by the receiving end 102 in any of the above methods, which will not be repeated here.
  • the communication steps such as step 203, step 303, step 403, step 601, but not limited thereto
  • FIG9 is a schematic diagram of the structure of a terminal 900 (e.g., user equipment, etc.) proposed in an embodiment of the present disclosure.
  • the terminal 900 may be a chip, a chip system, or a processor, etc. that supports a network device to implement any of the above methods, or may be a chip, a chip system, or a processor, etc. that supports a terminal to implement any of the above methods.
  • the terminal 900 may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.
  • the terminal 900 includes one or more processors 901.
  • the processor 901 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit.
  • the baseband processor may be used to process the communication protocol and the communication data
  • the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a program, and process the data of the program.
  • the terminal 900 is used to execute any of the above methods.
  • the terminal 900 further includes one or more memories 902 for storing instructions.
  • the memory 902 may also be outside the terminal 900.
  • the terminal 900 further includes one or more transceivers 904.
  • the transceiver 904 performs at least one of the communication steps such as sending and/or receiving in the above method (for example, step 202, step 302, step 402, step 502, step 203, step 303, step 403, step 601, but not limited thereto), and the processor 901 performs at least one of the other steps (for example, step 201, step 301, step 401, step 501, but not limited thereto).
  • the transceiver may include a receiver and/or a transmitter, and the receiver and the transmitter may be separate or integrated.
  • the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.
  • the terminal 900 may include one or more interface circuits 903.
  • the interface circuit 903 is connected to the memory 902, and the interface circuit 903 may be used to receive signals from the memory 902 or other devices, and may be used to send signals to the memory 902 or other devices.
  • the interface circuit 903 may read instructions stored in the memory 902 and send the instructions to the processor 901.
  • the terminal 900 described in the above embodiments may be a communication device such as a user device, but the scope of the terminal 900 described in the present disclosure is not limited thereto, and the structure of the terminal 900 may not be limited by FIG. 9.
  • the communication device may be an independent device or may be part of a larger device.
  • the communication device may be: (1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.
  • Fig. 10 is a schematic diagram of the structure of a chip 1000 provided in an embodiment of the present disclosure.
  • the terminal 900 may be a chip or a chip system
  • the chip 1000 includes one or more processors 1001 , and the chip 1000 is used to execute any of the above methods.
  • the chip 1000 further includes one or more 1003.
  • the interface circuit 1003 is connected to the memory 1002.
  • the interface circuit 1003 can be used to receive signals from the memory 1002 or other devices, and the interface circuit 1003 can be used to send signals to the memory 1002 or other devices.
  • the interface circuit 1003 can read the instructions stored in the memory 1002 and send the instructions to the processor 1001.
  • the interface circuit 1003 performs at least one of the communication steps such as sending and/or receiving in the above method (for example, step 202, step 302, step 402, step 502, step 203, step 303, step 403, step 601, but not limited thereto), and the processor 1001 performs at least one of the other steps (for example, step 201, step 301, step 401, step 501, but not limited thereto).
  • the communication steps such as sending and/or receiving in the above method
  • the processor 1001 performs at least one of the other steps (for example, step 201, step 301, step 401, step 501, but not limited thereto).
  • interface circuit interface circuit
  • transceiver pin transceiver
  • the chip 1000 further includes one or more memories 1002 for storing instructions. Alternatively, all or part of the memory 1002 may be outside the chip 1000.
  • the present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the terminal 900, the terminal 900 executes any of the above methods.
  • the storage medium is an electronic storage medium.
  • the storage medium is a computer-readable storage medium, but is not limited thereto, and it may also be a storage medium readable by other devices.
  • the storage medium may be a non-transitory storage medium, but is not limited thereto, and it may also be a temporary storage medium.
  • the present disclosure also proposes a program product, and when the program product is executed by the terminal 900, the terminal 900 executes any of the above methods.
  • the program product is a computer program product.
  • the present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to execute any one of the above methods.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
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Abstract

Les modes de réalisation de la présente divulgation concernent un procédé de transmission de trame de données, un terminal et un système de communication. Le procédé de transmission de trame de données comprend les étapes suivantes : une extrémité d'envoi détermine une première trame de données, la première trame de données contenant des premières informations d'identification, et les premières informations d'identification identifiant qu'une station (STA) est commutée d'un premier AP à un second AP et que la première trame de données est envoyée ou reçue par le second AP. Ainsi, une direction de transmission de données après commutation est indiquée au moyen des premières informations d'identification, sans aucun processus d'authentification ou de demande/réponse supplémentaire, ce qui permet de réduire le retard provoqué par la commutation dans la plus grande mesure ; et un nouveau processus d'interaction de message n'est pas introduit pendant un processus de commutation, empêchant ainsi l'interruption des données provoquée par un nouveau processus d'interaction de message.
PCT/CN2023/107572 2023-07-14 2023-07-14 Procédé de transmission de trame de données, terminal et système de communication Pending WO2025015471A1 (fr)

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