WO2023011414A1 - 无线帧发送方法及装置、无线帧接收方法及装置 - Google Patents

无线帧发送方法及装置、无线帧接收方法及装置 Download PDF

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WO2023011414A1
WO2023011414A1 PCT/CN2022/109459 CN2022109459W WO2023011414A1 WO 2023011414 A1 WO2023011414 A1 WO 2023011414A1 CN 2022109459 W CN2022109459 W CN 2022109459W WO 2023011414 A1 WO2023011414 A1 WO 2023011414A1
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information
field
length
sub
bytes
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PCT/CN2022/109459
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English (en)
French (fr)
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郭宇宸
李伊青
黄国刚
李云波
淦明
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华为技术有限公司
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Priority to EP22852126.6A priority Critical patent/EP4369847A1/en
Priority to BR112024002041A priority patent/BR112024002041A2/pt
Publication of WO2023011414A1 publication Critical patent/WO2023011414A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/14—Multichannel or multilink protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present application relates to the technical field of wireless local area networks (WLAN), and in particular to a wireless frame sending method and device, and a wireless frame receiving method and device.
  • WLAN wireless local area networks
  • one device may send a wireless frame containing an element (element) to another device, and the element may be used to carry information of the device.
  • the maximum length value of the information carried by an element is fixed, and the maximum length value is configured by the length value (Length) field in the element.
  • the length of the information to be transmitted is relatively large, it is possible that the length of the information carried by the element is greater than the maximum length value configured for the element, which may easily cause the element to fail to carry the device (single-link device or multi-link device).
  • the wireless frame transmission fails due to the information of the road device), which affects the communication efficiency.
  • the embodiment of the present application provides a wireless frame sending method and device, a wireless frame receiving method and device
  • a wireless frame transmission method including:
  • the wireless frame includes a first element, and the wireless frame further includes at least one of a second element and a third element;
  • the first element includes a first length field and a first information part after the first length field;
  • the first information part includes a first indication field and a first sub-element, and the first sub-element includes a first a sub-indication field and a first information field;
  • the second element includes a second length field and a second information part after the second length field;
  • the second information part includes a second indication field and a second sub-element, and the second sub-element includes a second a sub-indication field and a second information field;
  • the third element includes a third length field and a third information part after the third length field;
  • the third information part includes a third indication field and a third sub-element, and the third sub-element includes a third a sub-indication field and a third information field;
  • the information to be sent in segments with a total length of L bytes is carried in the first information field, and is also carried in at least one of the second information field and the third information field;
  • the length of the information carried in the first information field is K bytes
  • the length of the information carried by the second information field is the number of bytes of the second information part minus the sum of the number of bytes of the second indication field and the second sub-indication field X bytes;
  • the length of the information carried by the third information field is the total length L bytes minus the length K bytes of the information carried by the first information field;
  • the length of the information carried in the third information field is the total length L bytes minus the length K bytes of the information carried in the first information field, and then minus the information carried in the second information field length;
  • the radio frame is sent.
  • a wireless frame receiving method including:
  • the wireless frame includes a first element, and the wireless frame further includes at least one of a second element and a third element;
  • the first element includes a first length field and a first information part after the first length field;
  • the first information part includes a first indication field and a first sub-element, and the first sub-element includes a first a sub-indication field and a first information field;
  • the second element includes a second length field and a second information part after the second length field;
  • the second information part includes a second indication field and a second sub-element, and the second sub-element includes a second a sub-indication field and a second information field;
  • the third element includes a third length field and a third information part after the third length field;
  • the third information part includes a third indication field and a third sub-element, and the third sub-element includes a third a sub-indication field and a third information field;
  • the information to be sent in segments with a total length of L bytes is carried in the first information field, and is also carried in at least one of the second information field and the third information field;
  • the length of the information carried in the first information field is K bytes
  • the length of the information carried by the second information field is the number of bytes of the second information part minus the sum of X bytes of the number of bytes of the second indication field and the second sub-indication field; or another In other words, the length of the information carried by the second information field is the number of bytes indicated by the second length field minus the sum of the bytes of the second indication field and the second sub-indication field X words It should be understood that in an implementation manner, the value of the second length field is 255, indicating that the number of bytes of the second information part is 255 bytes.
  • the length of the information carried by the third information field is the total length L bytes minus the length K bytes of the information carried by the first information field;
  • the length of the information carried in the third information field is the total length L bytes minus the length K bytes of the information carried in the first information field, and then minus the information carried in the second information field length;
  • the information to be sent in segments is the information/data part of an information element, the length of which is L bytes, and the L bytes do not include the element of the information element The length of the ID field, length field, or element ID extension field.
  • the information element is a Multi-Link element; in another implementation, the information element is all fragmentable elements (fragmentable elements) defined by the 802.11 standard.
  • the first sub-element is an information element
  • the second sub-element and the third sub-element are segment elements.
  • the first sub-element includes an element identifier element ID; the second and third sub-elements include an element ID whose value is 242, Indicates that the second sub-element and the third sub-element are segment information elements.
  • the value of the first length field is 255, indicating that the length of the first information part is 255 bytes; the value of the first indication field The length is A1 bytes, the length of the first sub-indication field is A2 bytes, and the length K of the information carried in the first information field is 255-A1-A2 bytes.
  • the value of the second length field is 255, indicating that the length of the second information part is 255 bytes;
  • the second indication field The length is X1 bytes, the length of the first sub-indication field is X2 bytes, and the length of the information carried in the second information field is (255-X1-X2) bytes.
  • X1+X2 X;
  • the number of the second elements in Indicates rounding down.
  • the length of the information carried in the third information field is L-K-(the length of the second information part indicated by the second indication field-X) ⁇ M words Festival.
  • the length of the second indication field is X1 bytes, and the value of X1 is 3; the length of the second sub-indication field is X2 bytes, and the value of X2 is 2.
  • the third aspect of the embodiment of the present application provides a communication device, including at least one processor, the at least one processor is coupled to a memory; the memory is used to store programs or instructions; the at least one processor is used to execute the programs or instructions, To enable the device to implement the method described in the first aspect or any possible implementation of the first aspect, or to enable the device to implement the method described in the second aspect or any possible implementation of the second aspect method.
  • the fourth aspect of the embodiment of the present application provides a computer-readable storage medium that stores one or more computer-executable instructions.
  • the processor executes any one of the above-mentioned first aspect or the first aspect.
  • the processor executes the method described in the second aspect or any possible implementation manner of the second aspect.
  • the fifth aspect of the embodiment of the present application provides a computer program product (or computer program) storing one or more computers.
  • the processor executes the above-mentioned first aspect or the first The method in any possible implementation manner of the second aspect, or, the processor executes the method described in the second aspect or any possible implementation manner of the second aspect.
  • the sixth aspect of the embodiment of the present application provides a system-on-a-chip, where the system-on-a-chip includes at least one processor, configured to support the communication device to implement the functions involved in the above-mentioned first aspect or any possible implementation manner of the first aspect; Alternatively, the communication device is configured to implement the functions involved in the foregoing second aspect or any possible implementation manner of the second aspect.
  • the chip system may further include a memory, configured to store necessary program instructions and data of the communication device.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the chip system further includes an interface circuit, and the interface circuit provides program instructions and/or data for the at least one processor.
  • a seventh aspect of the embodiment of the present application provides a communication system, and the communication system includes the communication device of the third aspect and the communication device of the fourth aspect.
  • the technical effect brought by any one of the implementation manners from the third aspect to the seventh aspect may refer to the technical effects brought about by the different implementation manners in the above-mentioned first aspect to the second aspect, and details are not repeated here.
  • the wireless frame transmitted during WLAN communication includes the first element, the second element and/or the third element, which are used to carry segmented information.
  • the segmented information may be site information of the multi-link device.
  • Fig. 1 is a schematic diagram of the communication system of the embodiment of the present application.
  • FIG. 2 is a schematic diagram of multi-link association according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a wireless frame provided by an embodiment of the present application.
  • FIG. 4 is another schematic diagram of a wireless frame provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of segmented transmission provided in 802.11ai;
  • FIG. 6 is another schematic diagram of segmented transmission provided in 802.11ai;
  • Fig. 7 is a schematic diagram of segmented transmission
  • FIG. 8 is a schematic diagram of a wireless frame provided by an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a wireless frame transmission method provided in an embodiment of the present application.
  • FIG. 10 is a schematic diagram of the format of the segmentation element provided by the embodiment of the present application.
  • Fig. 11 is the schematic diagram that the radio frame that the embodiment of the present application provides adopts Multiple BSSID element to transmit;
  • FIG. 12 is a schematic diagram of the wireless frame provided by the embodiment of the present application using Multiple BSSID element transmission;
  • FIG. 13 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • FIG. 14 is another schematic diagram of a communication device provided by an embodiment of the present application.
  • plural means two or more than two.
  • At least one of the following or similar expressions refer to any combination of these items, including any combination of single or plural items.
  • at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same function and effect.
  • words such as “first” and “second” do not limit the number and execution order, and words such as “first” and “second” do not necessarily limit the difference.
  • words such as “exemplary” or “for example” are used to represent examples, illustrations or descriptions. Any embodiment or implementation scheme described as “exemplary” or “for example” in the embodiments of the present application shall not be interpreted as being more preferable or advantageous than other embodiments or implementation schemes. Rather, the use of words such as “exemplary” or “such as” is intended to present relevant concepts in a concrete manner for easy understanding.
  • system architecture of the method provided in the embodiment of the present application will be described below. It can be understood that the system architecture described in the embodiments of the present application is for more clearly illustrating the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application.
  • the technical solution provided by this application can be applied to WLAN scenarios, for example, it can be applied to IEEE 802.11 system standards, such as 802.11a/b/g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, or its next generation, such as 802.11be Standard or next-generation standard.
  • IEEE 802.11 system standards such as 802.11a/b/g standard, 802.11n standard, 802.11ac standard, 802.11ax standard, or its next generation, such as 802.11be Standard or next-generation standard.
  • the embodiment of the present application mainly takes the deployment of a WLAN network, especially a network using the IEEE 802.11 system standard as an example for illustration, those skilled in the art can easily understand that various aspects involved in this application can be extended to other networks using various standards or protocols , for example, BLUETOOTH (Bluetooth), high performance wireless LAN (high performance radio LAN, HIPERLAN) (a wireless standard similar to the IEEE 802.11 standard, mainly used in Europe), and wide area network (WAN), personal area network (personal area network) network, PAN) or other networks that are now known or developed in the future.
  • BLUETOOTH Bluetooth
  • high performance wireless LAN high performance radio LAN, HIPERLAN
  • WAN wide area network
  • PAN personal area network
  • the various aspects presented herein can be applied to any suitable wireless network, regardless of the coverage area and wireless access protocol used.
  • the embodiments of the present application may also be applicable to wireless local area network systems such as Internet of Things (Internet of Things, IoT) networks or Internet of Vehicles (Vehicle to X, V2X).
  • IoT Internet of Things
  • Vehicle to X V2X
  • the embodiment of the present application can also be applicable to other possible communication systems, for example, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division) duplex, TDD), universal mobile telecommunication system (universal mobile telecommunication system, UMTS), global interconnection microwave access (worldwide interoperability for microwave access, WiMAX) communication system, fifth generation (5th generation, 5G) communication system, and future The sixth generation (6th generation, 6G) communication system, etc.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • TDD time division duplex
  • TDD time division duplex
  • UMTS
  • the wireless frame sending method and device provided in the embodiments of the present application, as well as the wireless frame receiving method and device can be applied to a wireless communication system, and the wireless communication system can be a wireless local area network (wireless local area network, WLAN) or a cellular network.
  • the method It may be implemented by a communication device in a wireless communication system or a chip or a processor in a communication device, and the communication device may be a wireless communication device that supports multiple links for parallel transmission, for example, a multi-link device (multi-link device) -link device, MLD) or multi-band device (multi-band device). Compared with devices that only support single-link transmission, multi-link devices have higher transmission efficiency and higher throughput.
  • FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • the communication system mainly includes at least one multi-link access point device (Multi-link AP device) and at least one multi-link non-AP station device (Multi-link non-AP STA device) (referred to as a multi-link site device for short), wherein the multi-link access point device and the multi-link site device may be collectively referred to as a multi-link device.
  • Multi-link AP device multi-link access point device
  • Multi-link non-AP STA device multi-link non-AP station device
  • the multi-link device will be introduced below.
  • a multi-link device includes one or more affiliated stations (affiliated stations, denoted as affiliated STAs), and an affiliated STA is a logical station that can work on one link.
  • the affiliated station may be an access point (access point, AP) or a non-access point station (non-access point station, non-AP STA).
  • the multi-link device whose affiliated station is an AP can be called a multi-link AP or a multi-link AP device (multi-link AP device) or an AP multi-link device (AP multi-link device).
  • the affiliated station is a non-AP STA multi-link device (multi-link non-AP STA device) can be called a multi-link STA or multi-link STA device or STA multi-link device (STA multi-link device) .
  • the multi-link device includes the subordinate STA is also briefly described as “the multi-link device includes the STA” in the embodiment of the present application.
  • a multi-link device includes multiple logical sites, and each logical site works on one link, but allows multiple logical sites to work on the same link.
  • the link identifier mentioned below represents a station working on a link, that is, if there is more than one station on a link, more than one link identifier is required to represent them.
  • the link mentioned below sometimes also means the station working on the link.
  • a link identifier can be used to identify a link or a station on a link.
  • the multi-link AP device and the multi-link STA device may first negotiate or communicate the correspondence between the link identifier and a link or a station on a link. Therefore, in data transmission, there is no need to transmit a large amount of signaling information to indicate a link or a site on the link, just carry the link identifier, which reduces signaling overhead and improves transmission efficiency.
  • each link identification information field can suggest The corresponding relationship between a link ID and the stations working on a link.
  • Each link identification information field includes a link identification, and also includes: one or more of medium access control (medium access control, MAC) address, operation set, and channel number, wherein the MAC address, operation set, and channel number are One or more of may indicate a link; in another example, in the multi-link establishment association process, the multi-link AP device and the multi-link site device negotiate multiple link identification information fields.
  • medium access control medium access control
  • the multi-link AP device or the multi-link station device will use the link identifier to represent a station in the multi-link device.
  • the link identifier can also represent the MAC address of the station, and the working operation set , one or more attributes in the channel number.
  • the MAC address may also be replaced with an association identifier of the associated multi-link AP device.
  • the link identifier (a digital ID)
  • the meaning of representation includes not only the operation set where the link is located, the channel number, but also the station identifier working on the link , such as the MAC address or AID of the site.
  • Multi-link devices can follow 802.11 series protocols to realize wireless communication, for example, follow extremely high throughput (extremely high throughput, EHT) sites, or follow 802.11be-based or compatible 802.11be-supported sites to achieve communication with other devices, of course Other devices may or may not be multilink devices.
  • EHT extremely high throughput
  • 802.11be-based or compatible 802.11be-supported sites to achieve communication with other devices, of course
  • Other devices may or may not be multilink devices.
  • the non-AP MLD involved in this application can be a wireless communication chip, a wireless sensor or a wireless communication terminal.
  • user terminals user devices, access devices, subscriber stations, subscriber units, mobile stations, user agents, and user equipment supporting Wi-Fi communication functions, among which, user terminals may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, internet of things (IoT) devices, computing devices or other processing devices connected to a wireless modem, and various forms of user equipment (UE), mobile station (mobile station, MS ), terminal, terminal equipment, portable communication device, handset, portable computing device, entertainment device, gaming device or system, GPS device, or any other device configured for network communication via a wireless medium suitable equipment etc.
  • IoT internet of things
  • non-AP MLD can support the 802.11be standard or the next-generation WLAN standard of 802.11be.
  • Non-AP MLD can also support multiple WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.
  • the AP MLD involved in the embodiment of this application can be a device that is deployed in a wireless communication network to provide wireless communication functions for its associated non-AP, and is mainly deployed in homes, buildings, and campuses, with a typical coverage radius of tens of meters. Of course, it can also be deployed outdoors.
  • AP MLD is equivalent to a bridge connecting the wired network and the wireless network. Its main function is to connect various wireless network clients together, and then connect the wireless network to the Ethernet.
  • the AP MLD can be a base station with a Wi-Fi chip, a router, a gateway, a repeater, a communication server, a switch or a bridge and other communication equipment, wherein the base station can include various forms of macro base stations, micro base station, relay station, etc.
  • the AP MLD can support the 802.11be standard or the next-generation WLAN standard of 802.11be.
  • AP MLD can also support WLAN standards such as 802.11ax, 802.11ac, 802.11n, 802.11g, 802.11b and 802.11a.
  • the multi-link access point device and the multi-link station device can communicate through various wireless frames, such as association request frame, re-association request frame, association response frame, re-association response frame, probe response frame etc., where different radio frames can carry a multi-link element (multi-link element, MLE), which is used to carry the site information of the multi-link device through the MLE.
  • MLE multi-link element
  • the MLE may also be referred to as a multi-link information element.
  • association process of the multi-link device may be an example, and describe the specific implementation of the association request frame used in the association process.
  • a station in the multi-link station device may send an association request frame to an access point in the multi-link access point device
  • the MLE is carried in the association request frame to carry information of the current site of the multi-link site device and information of other sites in the multi-link device.
  • the association response frame returned by the access point to the station may also carry the MLE to carry information of the current access point of the multi-link access point device and information of other access points in the multi-link device.
  • the MLE includes an element identification (Element ID) field (for example, the value can be 255 as shown in Figure 3), a length value (Length) field, an element identification extension (Element ID Extension) field, a multi-link control (Multi-link Link Control) field, common information (Common Info) field and link information (Link Info) field.
  • element ID element identification
  • Length length value
  • Element ID Extension element identification extension
  • Multi-link Link Control multi-link control
  • Common Info Common information
  • Link Info link information
  • the Common Info field carries the common information of multiple sites in the multi-link device, as well as the information of the multi-link device itself;
  • the Link Info field carries the information of the sites on each link in the multi-link device;
  • the Control field carries the type of the multi-link element, and indicates which fields (present) appear and which fields do not appear in the Common Info.
  • the Link Info field can also include one or more each-site configuration (Per-STA Profile) fields, in Figure 3, the number of Per-STA Profile fields is x (x is greater than 1) as an example.
  • each Per-STA Profile field can also further include a subelement identification (Subelement ID) field (for example, the value can be 0 as shown in Figure 3), a length value (Length) field, and a data (Data) field.
  • Subelement ID subelement identification
  • Length Length
  • Data data
  • the Data field may also include a site control (STA Control) field, a site information (STA Info) field, and a site configuration (STA Profile) field.
  • STA Control site control
  • STA Info site information
  • STA Profile site configuration
  • the STA Profile field includes a plurality of domains (field), and in Figure 3, the number of fields is m (x is greater than 1) as an example; the STA Profile field also includes a plurality of elements (Element), as shown in Figure 3 In the example, the number of Elements is n (n is greater than 1). In addition, the STA Profile field also includes a possible (if present) non-inheritance element (Non-inheritance element).
  • the Length field indicates the number of bytes following the Length field in the MLE.
  • the length of the Length field in the MLE is 8 bits, and the length that can be indicated is 0 to 255 bytes, but the length of the information that the MLE needs to carry may exceed 255 bytes, making it impossible to use only one MLE to carry multiple links Device information.
  • each Per-STA Profile also has a length limit.
  • the length of the Length field in the Per-STA Profile is 8 bits, so that the Data part can only carry 255 bytes at most, but the station information on each link may be longer than 255 bytes, making it impossible to use only one Per-STA Profile.
  • STA Profile to carry station information on each link.
  • BSS basic service set
  • the wireless frame structure includes two adjacent multiple basic service set identification elements (Multiple BSSID elements).
  • Element ID Element ID
  • the Length field the Max BSSID Indicator (Max BSSID Indicator) field
  • the non-transmission BSSID configuration subelement Nontransmitted BSSID Profile subelement, or called Nontransmitted BSSID Profile
  • the number of Nontransmitted BSSID Profile fields is 0 or more (0 or more Nontransmitted BSSID Profile).
  • the number of Nontransmitted BSSID Profile subelement fields is i( i is greater than 1) as an example.
  • the i-th Nontransmitted BSSID Profile subelement includes a Subelement ID field (for example, the value can be 0), a Length field, and a Data field.
  • the Data field includes a nontransmitted BSSID Capability element (Nontransmitted BSSID Capability element) field, a service set identification element (SSID element), and multiple BSS ID index elements (Multiple BSSID-Index element), And one or more Element and Non-inheritance element(if present).
  • the i-th Nontransmitted BSSID Profile subelement in the first Multiple BSSID element includes the first to L (L is greater than 1) Elements, and the i-th in the second Multiple BSSID element
  • the Nontransmitted BSSID Profile subelement includes the L+1th to Yth (Y is greater than L) Elements.
  • the Multiple BSSID element is used to carry the information of multiple virtual APs in the multi-link device to which an AP belongs, and the Length field is 8 bits, indicating that it can carry up to 255 bytes. However, the length of multiple virtual AP information may exceed 255 bytes, so multiple multiple BSSID elements need to be used to carry multiple virtual AP information.
  • the first multiple BSSID element carries the information of the first part from the first BSS to the i-th BSS; the second multiple BSSID element carries the remaining information of the i-th BSS and the information of the i+th BSS 1 BSS information.
  • the contents of two multiple BSSID elements can be spliced together to obtain the information of the first to i+1th BSS, and the information of each BSS starts with the Nontransmitted BSSID Capability element.
  • the site needs to read the first information of the Data part of the Nontransmitted BSSID Profile subelement in the second multiple BSSID element unit, according to whether the first information unit is Nontransmitted BSSID Capability element to judge whether this is a new BSS information or the remaining part of the previous BSS information.
  • the first field of the Per-STA Profile subelement is the STA Control field, not an information unit.
  • the content carried by the STA Control field is variable, unlike a fixed information unit, the content of the first byte (element ID) is fixed. Therefore, it is impossible to judge whether this is the information of a new AP or the information of the remaining part of the previous AP by reading the first byte of the Data part of the Per-STA Profile in the second MLE.
  • the implementation method of carrying the information of the same AP through multiple BSSID elements currently used in the Multiple BSSID element is not suitable for the process of carrying the site information of the same link through multiple MLEs in MLE.
  • the L bytes may be divided into M+N parts. If the information element does not contain the Element ID Extension field, then:
  • the first part is carried in an information element (the value of Element ID indicates that it is an information element), and the rest is carried in one or more fragment information elements (fragment elements), which are the One, the value of its element ID is 242, indicating that the information element is a fragment information element, and the element ID is represented as a fragment identifier (fragment ID, FID).
  • fragment ID fragment identifier
  • the length of the information element corresponding to the M parts is 255 bytes
  • the length m of the information element corresponding to the N parts (if present) is less than 255 bytes.
  • the information segmentation mechanism mentioned in the 802.11ai standard does not apply to the data part of the element that further includes the indication field and the sub-element, because in this scenario, the information can only be carried in the data of the sub-element of the element part, and the indication field cannot be used to carry information, so the formulas provided in 802.11ai are not applicable, and cannot solve the problem of segmented information transmission in this case.
  • the multiple basic service set identification element shown in Figure 3 is used to bear the same multiple basic service set identification set as this AP. (Multiple BSSID Set) AP information.
  • the Multiple BSSID element includes the MaxBSSID Indicator field and one or more Nontransmitted BSSID Profile sub-elements, and each Nontransmitted BSSID Profile sub-element carries information about APs that belong to the same Multiple BSSID Set as the AP.
  • the first three information elements are Nontransmitted BSSID capability element, SSID element and Multiple BSSID-Index element, and several other elements can be included later.
  • the length of some elements may be longer than 255 bytes. If the information segmentation mechanism provided by 802.11ai is used to segment it, there will be a problem that the length (the length indicated by the Length field) does not match the actual one.
  • the length of the Length field in the information element corresponding to the first segment should be set to 254, but limited by the maximum length of the Multiple BSSID element, the length of the Data part actually carried in the information element corresponding to the first segment is less than 254 bytes, which is inconsistent with the length indicated by the Length field.
  • the present application provides a wireless frame sending method and device, a wireless frame receiving method and device, which are used to carry information exceeding the maximum length of one element through at least two elements in a wireless frame , and when at least two elements are used to carry information, it is also considered to carry information after removing the overhead of some indication fields in the element, so as to realize the information carrying of single-link site equipment or multi-link site equipment, and avoid wireless Frame transmission failure and error analysis at the receiving end improve communication efficiency.
  • this application provides a mechanism for segmented transmission of the information part of the sub-element of the information in a certain element, so as to realize the information bearing of single-link or multi-link site equipment, and avoid wireless frame transmission failure and Error analysis at the receiving end improves communication efficiency.
  • the information to be sent in segments is sent in multiple elements, the information to be sent in segments is the information/data field part of an information element, and its length is L bytes, excluding the information element itself
  • the element ID field, the Length field, or the Element ID Extension field is not included.
  • Each element carries information about a segment.
  • the information element is a Multi-Link element; in another implementation, the information element is all fragmentable elements (fragmentable elements) defined by the 802.11 standard.
  • an element carries information, for example, element 22 carries information 23, and this element 22 is carried in information 21 of another element element 2 for transmission.
  • another element carried in the information part of an element is called a sub-element, and this application refers to this scenario as a structure with at least two layers of element nesting , for example, the element 22 in the information part information 21 of the element element 2 in Figure 8 is called element2 and element 22 is two layers of element nesting.
  • this application describes the problem of how to realize segmented transmission of information under the framework of at least two levels of element nesting, and neither elements nor sub-elements are used to limit the names of elements.
  • the length of the information part that can be carried in an element is indicated by the length field in it.
  • the length field in an element is currently set to 255 to indicate the length of the subsequent information part Equivalent to 255 bytes.
  • each layer of element carries a length field. If it is set to 255 bytes as in the prior art, this will inevitably cause errors. Therefore, in this application, the value of the length field corresponding to the topmost element is set to 255, and the value of the length field corresponding to the sub-element nested in the element is less than 255 bytes, or the information of the element The length of the information that the field can carry is less than 255 bytes; specifically, it is necessary to subtract the length of the indication field included in the element from 255.
  • the length of the segment information carried in the information field of the sub-element it includes plus the length of the indication field in this element is less than or equal to the length of the element
  • the length indicated by the field is 255 bytes.
  • Embodiment 1 of the present application multiple elements can be used to carry information that could not be carried by one element, and the length of the carrying information part fully considers removing some inherent indication overhead in an element, so that the information can be correctly carried in segments, receiving There will be no parsing errors on the end.
  • FIG. 9 it is a schematic flowchart of a wireless frame sending method provided by the present application.
  • the method embodiment includes:
  • Step S101 The sending device generates a wireless frame, the wireless frame includes a first element, and the wireless frame further includes at least one of a second element and a third element;
  • the first element includes a first length field and a first information part after the first length field;
  • the first information part includes a first indication field and a first sub-element, and the first sub-element includes a first a sub-indication field and a first information field;
  • the second element includes a second length field and a second information part after the second length field;
  • the second information part includes a second indication field and a second sub-element, and the second sub-element includes a second a sub-indication field and a second information field;
  • the third element includes a third length field and a third information part after the third length field;
  • the third information part includes a third indication field and a third sub-element, and the third sub-element includes a third a sub-indication field and a third information field;
  • the information to be sent in segments with a total length of L bytes is carried in the first information field, and is also carried in at least one of the second information field and the third information field;
  • the length of the information carried in the first information field is K bytes
  • the length of the information carried by the second information field is the number of bytes of the second information part minus the sum of the number of bytes of the second indication field and the second sub-indication field X bytes;
  • the second indication field and the second sub-indication field are essentially the sum of all possible indication fields after the length field included in the second element, and the second indication field and the second sub-indication field can be summarized as indication field; in another implementation, only one of the second indication field and the second sub-indication field may exist.
  • the length of the information carried by the third information field is the total length L bytes minus the length K bytes of the information carried by the first information field;
  • the length of the information carried in the third information field is the total length L bytes minus the length K bytes of the information carried in the first information field, and then minus the information carried in the second information field length;
  • Step S102 the sending device sends the wireless frame.
  • Step S103 The receiving device obtains information with a total length of L bytes sent in segments according to the wireless frame.
  • the wireless frame includes a first element (element 1), and the wireless frame also includes at least one of the second element (element 2) and the third element (element 3);
  • the first element (element1) includes a first length field (length11) and a first information part (information11) after the first length field (length11), of course, before the first length field, it also includes an element identifier field (element ID 11);
  • the first information part (information11) includes a first indication field (such as including subelement ID12 and length 12) and a first subelement (element12), and the first subelement (element12) includes The first sub-indication field (such as element ID13 and length 13) and the first information field (information13);
  • first indication field and the first sub-indication field are examples, and the first indication field and the first sub-indication field can also be summarized as all indication fields included in the first information part; in actual scenarios , the first element may only include the first indication field, or only include the first sub-indication field; of course, the first element may also include other fields, or even other elements that are not used to transmit the information of this segment. regarded as the first indicator field and/or the first sub-indicator field;
  • the second element includes a second length field (length21) and a second information part (information21) after the second length field (length21).
  • the first length field it also includes an element identifier field (element ID 21);
  • the second information part (information 21) includes a second indication field (such as including subelement ID 22 and length 22) and a second subelement (element 22),
  • the second sub-element (element 22) includes a second sub-indicator field (such as element ID23 and length 23) and a second information field (information 23);
  • the second indication field and the second sub-indication field are examples, and the second indication field and the second sub-indication field can also be summarized as all indication fields included in the second information part; in actual scenarios , the second element may only include the second indication field, or only include the second sub-indication field; of course, the second element may also include other fields, or even other elements that are not used to transmit the information of this segment. regarded as a second indicator field and/or a second sub-indicator field;
  • the third element includes a third length field (length 31) and a third information part (information31) after the third length field (length 31), of course
  • an element identifier field (element ID 31) is also included;
  • the third information part (information 31) includes a third indication field (such as including subelement ID 32 and length 32) and a third subelement (element 32),
  • the third sub-element (element 32) includes a third sub-indicator field (such as element ID33 and length 33) and a third information field (information 33);
  • the third indication field and the third sub-indication field are examples, and the third indication field and the third sub-indication field can also be summarized as all indication fields included in the third information part; in actual scenarios , the third element may only include the third indication field, or only include the third sub-indication field; of course, the third element may also include other fields, or even other elements that are not used to transmit the information of this segment. considered as a third indicator field and/or a third sub-indicator field;
  • the total length to be sent in segments is that the information of L bytes is carried in the first information field (information 13), and is also carried in the second information field (information 23), the third information field (information 33) at least one of the
  • the first sub-element is an information element
  • the second and third sub-elements are segment elements.
  • the first sub-element includes an element identifier element ID which is the ID of the information element described in the information to be segmented;
  • the second sub-element and the third sub-element include an element ID whose value is 242, Indicates that the second sub-element and the third sub-element are fragment information elements, and at this time, the fragment element ID can also be called fragment ID (FID).
  • element ID which is the ID of the information element described in the information to be segmented
  • the second sub-element and the third sub-element include an element ID whose value is 242, Indicates that the second sub-element and the third sub-element are fragment information elements, and at this time, the fragment element ID can also be called fragment ID (FID).
  • FID fragment ID
  • the value of the first length field is 255, indicating that the length of the first information part is 255 bytes;
  • the length of the first indication field is A1 bytes, for example, in Figure 8, the first indication field includes subelement ID12 and length 12, the subelement ID12 and length 12 each occupy one byte, then A1 is 2 bytes;
  • the value of the second length field is 255, indicating that the length of the second information part is 255 bytes; the length of the second indication field is X1 bytes, and the length of the first sub-indication field is X2 bytes, the length of the information carried in the second information field is (255-X1-X2) bytes.
  • the second indication field comprises subelement ID22 and length 22, and this subelement ID22 and length 22 each occupy one byte, then X1 is 2 bytes;
  • the length of described second sub indication field is X2 byte, for example
  • the information to be sent in segments will also be carried in the second element, where the number of the second elements is M, and the value of M is as follows:
  • the length of the second information part indicated by the second indication field 255 bytes, then the number of the second element
  • the length of the second information part indicated by the second indication field 255 bytes, then the number of the third element
  • M may be 0, and the value of N may be 1, which means that except for the first element, only one other element is used to transmit segment information, and the information part carried in the other element is The length is less than 255-X.
  • the length of the information carried in the third information field is L-K-(the length of the second information part indicated by the second indication field-X) ⁇ M bytes.
  • the length of the second information part indicated by the second indication field is 255 bytes
  • the length of the information carried in the third information field is L-K-(255-X) ⁇ M bytes.
  • the wireless frame receiving device identifies the element ID of the first sub-element of the first element and the second sub-element of the second element according to the first element, the second element and/or the third element in the wireless frame
  • the element ID of the element ID and/or the element ID of the third sub-element of the third element, the element ID of the second sub-element and the third sub-element is found to be 242 (indicating that it is a Fragment element), and the element ID of the first sub-element is normal
  • the ID of the information element to know that the first information field of the first element, the second information field of the second element and/or the third information field of the third element carry segment information of the same information element, so that they can be Splicing is performed to obtain complete L-byte information. It should be understood that the first element, the second element and/or the third element are adjacent elements.
  • first element, the second element and the third element are adjacent elements.
  • multiple elements can be used to carry information that could not be carried by one element, and the length of the information part fully considers the removal of some inherent indication overhead in an element, so that the information can be correctly carried in segments, receiving There will be no parsing errors on the end.
  • the following describes when the segment information is carried in the Nontransmitted BSSID Profile sub-element of the Multiple BSSID element, that is, in the aforementioned embodiment, when the first element, the second element, and the third element are multiple BSSID elements Multiple BSSID element , a specific implementation method for segmented information transmission.
  • the L bytes can be divided into the first information, the second information part and/or the third information part, which are carried in multiple Multiple BSSID elements respectively. Segmented transfers.
  • the first information part is carried in an information element (or in an information element whose element identifier is the same as the element identifier of the information element), and the rest of the second information part and/or the third
  • the information part is carried in one or more fragment elements (Fragment element).
  • Fragment element The format of Fragment element is shown in Figure 10:
  • the length of the first part of information is: the maximum length of the information element that can be carried by the first Multiple BSSID element carrying the information element.
  • the value of the Length field of the first Multiple BSSID element carrying the information element is 255.
  • the length of the first information part is, when carrying the Length field in the Multiple BSSID element of the first information part of the information element (the first Length field, that is, the field used to represent the length of the Multiple BSSID element)
  • the maximum length of the information part that can be carried Assume that the length of the first information part is K bytes.
  • the second information part is carried in M Multiple BSSID elements, Indicates that the result of (LK)/(255-X) is rounded down.
  • each information part in the M parts is (255-X) bytes, which are respectively carried by a Multiple BSSID element.
  • the reason why the length of each information part is 255 minus X bytes is because in carrying the M second elements, each second element needs to carry some fixed overhead in addition to carrying the information part, these The length of the fixed overhead is determined by the element type of the second element.
  • the fixed overhead may include:
  • MaxBSSIDIndicator 1 byte
  • the subelement ID field in the Nontransmitted BSSID Profile subelement 1 byte;
  • the Element ID field of the Fragment element used to carry each of the M parts of the information part 1 byte;
  • the Length field of the Fragment element used to carry each of the M parts of the information element 1 byte;
  • the value of X is 5 bytes in total of the bytes of the above indication fields except the information part;
  • the fixed overhead may also include fields that must be carried in the second element.
  • the Multiple BSSID element must carry a 1-byte MaxBSSID Indicator field.
  • N the N parts are the last part after the Information part of the information element is segmented, and its length is L-K-250*M.
  • the information to be transmitted in segments is divided into multiple segments for a total of L bytes, wherein the first segment is K bytes, which makes the Length of the Multiple BSSID element carrying the first segment be 255 At this time, after the number of bytes included in the indication field or other elements already carried by the Multiple BSSID element, the remaining K bytes are used to carry the first part of the segment information.
  • the length of the information part of the last piece of segmented transmission is m bytes, where m ⁇ 250. Except for the first segment and the last segment, the information part of the middle segment is carried in the information field of M elements, the length of which is 250 bytes, and the M elements are respectively carried in M Multiple BSSID elements.
  • the information to be transmitted in segments may also be referred to as data to be transmitted in segments, and the foregoing information field carrying segment information may also be referred to as a data field.
  • the receiving end recognizes the element ID of the first sub-element of the first Multiple BSSID element, the second Multiple BSSID
  • the element ID of the second sub-element of the element and/or the element ID of the third sub-element of the third Multiple BSSID element, the element ID of the second sub-element and the third sub-element is found to be 242 (indicating that it is a Fragment element)
  • the first The element ID of the child element is the ID of a normal information element, so as to know the first information field of the first Multiple BSSID element, the second information field of the second Multiple BSSID element and/or the third information field of the third Multiple BSSID element What is needed is segmented information of the same information element, so that they can be spliced to obtain complete L-byte information. It should be understood that the first Multiple BSSID element, the second Multiple BSSID element and/or the third Multiple BSSID element are adjacent elements.
  • multiple Multiple BSSID elements can be used to carry information that could not be carried by one Multiple BSSID element, and the length of the information part is fully considered to remove some inherent indication overhead in the Multiple BSSID element, so that the information can be correctly read. Segmentation is carried, and the receiving end will not have parsing errors.
  • first element the second element and/or the third element
  • Neighbor Report element as shown in Figure 12:
  • the implementation of segmented carrying of the information to be sent in the Neighbor Report element is similar to the aforementioned implementation in the Multiple BSSID element, and will not be repeated here.
  • the length of the information part carried by the last Neighbor Report element is L-K-250*M bytes.
  • the receiving end identifies the element ID of the first sub-element of the first Neighbor Report element, the second Neighbor Report
  • the element ID of the second sub-element of the element and/or the element ID of the third sub-element of the third Neighbor Report element, the element ID of the second sub-element and the third sub-element is found to be 242 (indicating that it is a Fragment element)
  • the first The element ID of the child element is the ID of a normal information element, so as to know the first information field of the first Neighbor Report element, the second information field of the second Neighbor Report element and/or the third information field of the third Multiple BSSID element What is needed is segmented information of the same information element, so that they can be spliced to obtain complete L-byte information. It should be understood that the first Neighbor Report element, the second Neighbor Report element and/or the third Neighbor Report element are adjacent elements.
  • multiple Neighbor Report elements can be used to carry information that could not be carried by one Neighbor Report element, and the length of the information part is fully considered to remove some inherent indication overhead in the Neighbor Report element, so that the information can be correctly read. Segmentation is carried, and the receiving end will not have parsing errors.
  • FIG. 13 is a schematic diagram of a communication device 1000 provided by an embodiment of the present application, wherein the communication device 1000 includes a processing unit 1001 and a transceiver unit 1002 .
  • the communication device 1000 may be a wireless frame sending device, configured to implement the wireless frame sending method in any of the foregoing embodiments.
  • the processing unit 1001 and the transceiver unit 1002 perform the following operations:
  • the processing unit 1001 generates a wireless frame, where the wireless frame includes a first element, and the wireless frame further includes at least one of a second element and a third element;
  • the first element includes a first length field and a first information part after the first length field;
  • the first information part includes a first indication field and a first sub-element, and the first sub-element includes a first a sub-indication field and a first information field;
  • the second element includes a second length field and a second information part after the second length field;
  • the second information part includes a second indication field and a second sub-element, and the second sub-element includes a second a sub-indication field and a second information field;
  • the third element includes a third length field and a third information part after the third length field;
  • the third information part includes a third indication field and a third sub-element, and the third sub-element includes a third a sub-indication field and a third information field;
  • the information to be sent in segments with a total length of L bytes is carried in the first information field, and is also carried in at least one of the second information field and the third information field;
  • the length of the information carried in the first information field is K bytes
  • the length of the information carried by the second information field is the number of bytes of the second information part minus the sum of the number of bytes of the second indication field and the second sub-indication field X bytes;
  • the second indication field and the second sub-indication field are essentially the sum of all possible indication fields after the length field included in the second element, and the second indication field and the second sub-indication field can be summarized as indication field; in another implementation, only one of the second indication field and the second sub-indication field may exist.
  • the length of the information carried by the third information field is the total length L bytes minus the length K bytes of the information carried by the first information field;
  • the length of the information carried in the third information field is the total length L bytes minus the length K bytes of the information carried in the first information field, and then minus the information carried in the second information field length;
  • the transceiver unit 1002 sends the wireless frame.
  • the communication device 1000 may specifically be a wireless frame receiving device, configured to implement the wireless frame sending method in any of the foregoing embodiments.
  • the processing unit 1001 and the transceiver unit 1002 perform the following operations:
  • the processing unit 1001 is further configured to obtain information with a total length of L bytes sent in segments according to the wireless frame.
  • the processing unit 1001 identifies the element ID in the wireless frame according to the first element, the second element and/or the third element, so as to know which first element, second element and/or third element
  • the first information field, the second information field and/or the third information field carry segment information of the same information element, so that they can be spliced to obtain complete L-byte information.
  • the wireless frame includes a first element (element 1), and the wireless frame also includes at least one of the second element (element 2) and the third element (element 3);
  • the first element (element1) includes a first length field (length11) and a first information part (information11) after the first length field (length11), of course, before the first length field, it also includes an element identifier field (element ID 11);
  • the first information part (information11) includes a first indication field (such as including subelement ID12 and length 12) and a first subelement (element12), and the first subelement (element12) includes The first sub-indication field (such as element ID13 and length 13) and the first information field (information13);
  • first indication field and the first sub-indication field are examples, and the first indication field and the first sub-indication field can also be summarized as all indication fields included in the first information part; in actual scenarios , the first element may only include the first indication field, or only include the first sub-indication field; of course, the first element may also include other fields, or even other elements that are not used to transmit the information of this segment. regarded as the first indicator field and/or the first sub-indicator field;
  • the second element includes a second length field (length21) and a second information part (information21) after the second length field (length21).
  • the first length field it also includes an element identifier field (element ID 21);
  • the second information part (information 21) includes a second indication field (such as including subelement ID 22 and length 22) and a second subelement (element 22),
  • the second sub-element (element 22) includes a second sub-indicator field (such as element ID23 and length 23) and a second information field (information 23);
  • the second indication field and the second sub-indication field are examples, and the second indication field and the second sub-indication field can also be summarized as all indication fields included in the second information part; in actual scenarios , the second element may only include the second indication field, or only include the second sub-indication field; of course, the second element may also include other fields, or even other elements that are not used to transmit the information of this segment. regarded as a second indicator field and/or a second sub-indicator field;
  • the third element includes a third length field (length 31) and a third information part (information31) after the third length field (length 31), of course
  • an element identifier field (element ID 31) is also included;
  • the third information part (information 31) includes a third indication field (such as including subelement ID 32 and length 32) and a third subelement (element 32),
  • the third sub-element (element 32) includes a third sub-indicator field (such as element ID33 and length 33) and a third information field (information 33);
  • the third indication field and the third sub-indication field are examples, and the third indication field and the third sub-indication field can also be summarized as all indication fields included in the third information part; in actual scenarios , the third element may only include the third indication field, or only include the third sub-indication field; of course, the third element may also include other fields, or even other elements that are not used to transmit the information of this segment. considered as a third indicator field and/or a third sub-indicator field;
  • the total length to be sent in segments is that the information of L bytes is carried in the first information field (information 13), and is also carried in the second information field (information 23), the third information field (information 33) at least one of the
  • the first sub-element is an information element
  • the second and third sub-elements are segment elements.
  • the first sub-element includes an element identifier element ID which is the ID of the information element described in the information to be segmented;
  • the second sub-element and the third sub-element include an element ID whose value is 242, Indicates that the second sub-element and the third sub-element are fragment information elements, and at this time, the fragment element ID can also be called fragment ID (FID).
  • element ID which is the ID of the information element described in the information to be segmented
  • the second sub-element and the third sub-element include an element ID whose value is 242, Indicates that the second sub-element and the third sub-element are fragment information elements, and at this time, the fragment element ID can also be called fragment ID (FID).
  • FID fragment ID
  • the value of the first length field is 255, indicating that the length of the first information part is 255 bytes;
  • the length of the first indication field is A1 bytes, for example, in Figure 8, the first indication field includes subelement ID12 and length 12, the subelement ID12 and length 12 each occupy one byte, then A1 is 2 bytes;
  • the value of the second length field is 255, indicating that the length of the second information part is 255 bytes; the length of the second indication field is X1 bytes, and the length of the first sub-indication field is X2 bytes, the length of the information carried in the second information field is (255-X1-X2) bytes.
  • the second indication field comprises subelement ID22 and length 22, and this subelement ID22 and length22 each occupy one byte, then X1 is 2 bytes;
  • the length of described first sub indication field is X2 byte, for example Fig.
  • the information to be sent in segments will also be carried in the second element, where the number of the second elements is M, and the value of M is as follows:
  • the length of the second information part indicated by the second indication field 255 bytes, then the number of the second element
  • the length of the second information part indicated by the second indication field 255 bytes, then the number of the third element
  • M may be 0, and the value of N may be 1, which means that except for the first element, only one other element is used to transmit segment information, and the information part carried in the other element is The length is less than 255-X.
  • the length of the information carried in the third information field is L-K-(the length of the second information part indicated by the second indication field-X) ⁇ M bytes.
  • the length of the second information part indicated by the second indication field is 255 bytes
  • the length of the information carried in the third information field is L-K-(255-X) ⁇ M bytes.
  • first element, second element, and third element may be Multiple BSSID element or Neighbor Report element.
  • multiple elements can be used to carry information that could not be carried by one element, and the length of the information part is fully considered to remove some inherent indication overhead in an element, so that the information can be correctly carried in segments, and the receiving end There will also be no parsing errors.
  • the communication device 1000 can also be used to implement the other embodiments in the aforementioned FIG. 1 to FIG. 12 and achieve corresponding beneficial effects.
  • the communication device 1000 can also be used to implement the other embodiments in the aforementioned FIG. 1 to FIG. 12 and achieve corresponding beneficial effects.
  • FIG. 14 is a schematic structural diagram of a communication device 1100 provided by an embodiment of the present application.
  • the communication device 1100 includes a processor 1101 and a transceiver 1102 .
  • the communication device 1100 may be a wireless frame sending device or a wireless frame receiving device, or a chip therein.
  • FIG. 14 shows only the main components of the communication device 1100 .
  • the communication device may further include a memory 1103 and an input and output device (not shown in the figure).
  • the processor 1101 is mainly used for processing communication protocols and communication data, controlling the entire communication device, executing software programs, and processing data of the software programs.
  • the memory 1103 is mainly used to store software programs and data.
  • the transceiver 1102 may include a radio frequency circuit and an antenna, and the radio frequency circuit is mainly used for converting a baseband signal to a radio frequency signal and processing the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.
  • the processor 1101, the transceiver 1102, and the memory 1103 may be connected through a communication bus.
  • the processor 1101 can read the software program in the memory 1103, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor 1101 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1101, and the processor 1101 converts the baseband signal into data and processes the data deal with.
  • the processor 1201 may include a communication interface for implementing receiving and sending functions.
  • the communication interface may be a transceiver circuit, or an interface, or an interface circuit.
  • the transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together.
  • the above-mentioned transceiver circuit, interface or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit may be used for signal transmission or transmission.
  • the processor 1201 may store an instruction, and the instruction may be a computer program, and the computer program runs on the processor 1201 to enable the communication device 1200 to execute the method described in any of the above embodiments.
  • the computer program may be solidified in the processor 1201, and in this case, the processor 1201 may be implemented by hardware.
  • the communication device 1200 may include a circuit, and the circuit may implement the function of sending or receiving or communicating in any of the foregoing embodiments.
  • the processor and communication interface described in this application can be implemented in integrated circuit (integrated circuit, IC), analog IC, radio frequency integrated circuit (radio frequency integrated circuit, RFIC), mixed signal IC, application specific integrated circuit (application specific integrated circuit) , ASIC), printed circuit board (printed circuit board, PCB), electronic equipment, etc.
  • the processor and communication interface can also be fabricated using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS complementary metal oxide semiconductor
  • NMOS nMetal-oxide-semiconductor
  • PMOS P-type Metal oxide semiconductor
  • BJT bipolar junction transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • the radio frequency circuit and the antenna can be set independently from the processor for baseband processing.
  • the radio frequency circuit and antenna can be arranged remotely from the communication device. .
  • a communication device may be a stand-alone device or may be part of a larger device.
  • the communication device may be:
  • a set of one or more ICs may also include storage components for storing data and instructions;
  • ASIC such as modem (Modem);
  • Receivers smart terminals, wireless devices, handsets, mobile units, vehicle-mounted devices, cloud devices, artificial intelligence devices, etc.;
  • the processor 1101 may be used to perform, for example but not limited to, baseband related processing
  • the transceiver 1102 may be used to perform, for example but not limited to, radio frequency transceiving.
  • the above-mentioned devices may be respectively arranged on independent chips, or at least partly or all of them may be arranged on the same chip.
  • processors can be further divided into analog baseband processors and digital baseband processors.
  • the analog baseband processor can be integrated with the transceiver on the same chip, and the digital baseband processor can be set on an independent chip.
  • a digital baseband processor can be combined with a variety of application processors (such as but not limited to graphics processors, multimedia processors, etc.) integrated on the same chip.
  • application processors such as but not limited to graphics processors, multimedia processors, etc.
  • Such a chip can be called a system chip (system on chip). Whether each device is independently arranged on different chips or integrated and arranged on one or more chips often depends on the specific needs of the product implementation. The embodiment of the present invention does not limit the specific implementation forms of the foregoing devices.
  • the embodiment of the present application also provides a computer-readable storage medium, where computer program code is stored, and when the above-mentioned processor executes the computer program code, the electronic device executes the method in any one of the above-mentioned embodiments.
  • An embodiment of the present application further provides a computer program product, which, when the computer program product is run on a computer, causes the computer to execute the method in any one of the foregoing embodiments.
  • the embodiment of the present application also provides a communication device, which can exist in the product form of a chip.
  • the structure of the device includes a processor and an interface circuit.
  • the processor is used to communicate with other devices through a receiving circuit, so that the device performs the aforementioned The method in any of the examples.
  • An embodiment of the present application further provides a WLAN communication system, including a wireless frame sending device and a wireless frame receiving device, and the wireless frame sending device and the wireless frame receiving device can execute the method in any of the preceding embodiments.
  • the steps of the methods or algorithms described in connection with the disclosure of this application can be implemented in the form of hardware, or can be implemented in the form of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, erasable programmable read-only memory (Erasable Programmable ROM, EPROM), electrically erasable Programmable read-only memory (Electrically EPROM, EEPROM), registers, hard disk, removable hard disk, CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the ASIC may be located in the core network interface device.
  • the processor and the storage medium may also exist in the core network interface device as discrete components.
  • Computer-readable media includes both computer-readable storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.

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Abstract

本申请提供了无线帧发送和接收方法及装置，无线帧发送方法包括：生成并发送无线帧，无线帧包括一个第一元素，还包括第二元素、第三元素中的至少一种；总长度为L字节的信息携带于第一元素的第一信息字段中，还携带于第二元素的第二信息字段、第三元素的第三信息字段的至少一项中；其中，第一信息字段携带的信息的长度为K字节；第二信息字段携带的信息的长度为第二信息部分的字节数减去第二指示字段和第二子指示字段的字节数之和；第三信息字段携带的信息的长度为总长度L字节减去第一信息字段携带的信息的长度；或再减去所述第二信息字段携带的信息的长度。本申请应用于支持IEEE 802.11ax下一代WiFi协议，如802.11be，或EHT等802.11系列协议的无线局域网系统。

Description

无线帧发送方法及装置、无线帧接收方法及装置 技术领域
本申请涉及无线局域网(wireless local area networks，WLAN)技术领域，尤其涉及一种无线帧发送方法及装置、无线帧接收方法及装置。
背景技术
随着无线技术的发展，在设备之间的通信过程中，一个设备可以向另一个设备发送包含有元素(element)的无线帧，该元素可以用于承载该设备的信息。其中，一个元素所承载信息的最大长度值是固定的，且该最大长度值由该元素中的长度值(Length)字段所配置。
然而，在所要传输的信息长度较大时，有可能出现该元素承载的信息长度大于该元素所配置的最大长度值的情况，容易导致该元素由于无法承载该设备(单链路设备或者多链路设备)的信息而导致无线帧传输失败，影响通信效率。
发明内容
本申请实施例提供了一种无线帧发送方法及装置、无线帧接收方法及装置
本申请第一方面，提供了一种无线帧发送方法，包括：
生成无线帧，所述无线帧包括一个第一元素，所述无线帧还包括第二元素、第三元素中的至少一种；
所述第一元素包括第一长度字段以及位于所述第一长度字段之后第一信息部分；所述第一信息部分包括第一指示字段和第一子元素，所述第一子元素包括第一子指示字段和第一信息字段；
所述第二元素包括第二长度字段以及位于所述第二长度字段之后第二信息部分；所述第二信息部分包括第二指示字段和第二子元素，所述第二子元素包括第二子指示字段和第二信息字段；
所述第三元素包括第三长度字段以及位于所述第三长度字段之后第三信息部分；所述第三信息部分包括第三指示字段和第三子元素，所述第三子元素包括第三子指示字段和第三信息字段；
待分段发送的总长度为L个字节的信息携带于所述第一信息字段中，还携带于所述第二信息字段、第三信息字段的至少一项中；
其中，所述第一信息字段携带的信息的长度为K个字节；
所述第二信息字段携带的信息的长度为所述第二信息部分的字节数减去所述第二指示字段和第二子指示字段的字节数之和X个字节；
所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度K个字节；或
所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度K个字节，再减去所述第二信息字段携带的信息的长度；
发送所述无线帧。
本申请第二方面，提供一种无线帧接收方法，包括：
接收无线帧，所述无线帧包括一个第一元素，所述无线帧还包括第二元素、第三元素中的至少一种；
所述第一元素包括第一长度字段以及位于所述第一长度字段之后第一信息部分；所述第一信息部分包括第一指示字段和第一子元素，所述第一子元素包括第一子指示字段和第一信息字段；
所述第二元素包括第二长度字段以及位于所述第二长度字段之后第二信息部分；所述第二信息部分包括第二指示字段和第二子元素，所述第二子元素包括第二子指示字段和第二信息字段；
所述第三元素包括第三长度字段以及位于所述第三长度字段之后第三信息部分；所述第三信息部分包括第三指示字段和第三子元素，所述第三子元素包括第三子指示字段和第三信息字段；
待分段发送的总长度为L个字节的信息携带于所述第一信息字段中，还携带于所述第二信息字段、第三信息字段的至少一项中；
其中，所述第一信息字段携带的信息的长度为K个字节；
所述第二信息字段携带的信息的长度为所述第二信息部分的字节数减去所述第二指示字段和第二子指示字段的字节数之和X个字节；或者换一种说法，所述第二信息字段携带的信息的长度为所述第二长度字段所指示的字节数减去所述第二指示字段和第二子指示字段的字节数之和X个字节；应理解，一种实现方式中，所述第二长度字段的取值为255，指示第二信息部分的字节数为255个字节。
所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度K个字节；或
所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度K个字节，再减去所述第二信息字段携带的信息的长度；
根据所述无线帧获得分段发送的总长度为L字节的信息。
本申请第一方面或第二方面的一种实现方式中，待分段发送的信息为一个信息元素的information/data部分，其长度为L字节,该L个字节不包括信息元素的element ID字段，length字段，或element ID extension字段的长度。一种实现中，所述信息元素为多链路元素Multi-Link element；另外的实现方式中，所述信息元素为802.11标准定义的所有的可以被分段的元素(fragmentable element)。
本申请第一方面或第二方面的一种实现方式中，所述第一子元素为信息元素，所述第二子元素、所述第三子元素为分段元素。
本申请第一方面或第二方面的又一实现方式中，所述第一子元素包括元素标识符element ID；所述第二子元素、第三子元素包括element ID，其取值为242，表示所述第二子元素和所述第三子元素为分段信息元素。
本申请第一方面或第二方面的又一实现方式中，所述第一长度字段的取值为255，指示所述第一信息部分的长度为255个字节；所述第一指示字段的长度为A1字节，所述第一子指示字段的长度为A2字节，所述第一信息字段携带的信息的长度K为255-A1-A2字节。
本申请第一方面或第二方面的又一实现方式中，所述第二长度字段的取值为255，指示所述第二信息部分的长度为255个字节；所述第二指示字段的长度为X1字节，所述第一子指示字段的长度为X2字节，所述第二信息字段携带的信息的长度为(255-X1-X2)字节。其 中，X1+X2＝X；
本申请第一方面或第二方面的又一实现方式中，所述第二元素的个数
Figure PCTCN2022109459-appb-000001
其中，
Figure PCTCN2022109459-appb-000002
表示向下取整。
一种实现中，
Figure PCTCN2022109459-appb-000003
本申请第一方面或第二方面的又一实现方式中，所述第三元素的个数
Figure PCTCN2022109459-appb-000004
或者
Figure PCTCN2022109459-appb-000005
一种实现中，
Figure PCTCN2022109459-appb-000006
或者
Figure PCTCN2022109459-appb-000007
本申请第一方面或第二方面的又一实现方式中，所述第三信息字段携带的信息的长度为L-K-(第二指示字段所指示的第二信息部分的长度-X)×M字节。一种实现中，L-K-(255-X)×M字节。
本申请第一方面或第二方面的又一实现方式中，所述第一元素，第二元素，第三元素为多BSSID元素Multiple BSSID element，X＝5。
一种实现方式中，所述第二指示字段的长度为X1字节，X1的取值为3，所述第二子指示字段的长度为X2字节，X2的取值为2。
本申请第一方面或第二方面的又一实现方式中，所述第一元素，第二元素，第三元素为邻居报告元素，X＝15。
本申请实施例第三方面提供了一种通信装置，包括至少一个处理器，该至少一个处理器与存储器耦合；该存储器用于存储程序或指令；该至少一个处理器用于执行该程序或指令，以使该装置实现前述第一方面或第一方面任意一种可能的实现方式所述的方法，或者，以使该装置实现前述第二方面或第二方面任意一种可能的实现方式所述的方法。
本申请实施例第四方面提供一种存储一个或多个计算机执行指令的计算机可读存储介质，当计算机执行指令被处理器执行时，该处理器执行如上述第一方面或第一方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第二方面或第二方面任意一种可能的实现方式所述的方法。
本申请实施例第五方面提供一种存储一个或多个计算机的计算机程序产品(或称计算机程序)，当计算机程序产品被该处理器执行时，该处理器执行如上述第一方面或第一方面任意一种可能实现方式的方法，或者，该处理器执行如上述第二方面或第二方面任意一种可能的实现方式所述的方法。
本申请实施例第六方面提供了一种芯片系统，该芯片系统包括至少一个处理器，用于支持通信装置实现上述第一方面或第一方面任意一种可能的实现方式中所涉及的功能；或者，用于支持通信装置实现上述第二方面或第二方面任意一种可能的实现方式中所涉及的功能。
在一种可能的实现方式中，该芯片系统还可以包括存储器，用于保存该通信装置必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件。可选的，该芯片系统还包括接口电路，该接口电路为该至少一个处理器提供程序指令和/或数据。
本申请实施例第七方面提供了一种通信系统，该通信系统包括上述第三方面的通信装置和第四方面的通信装置。
其中，第三方面至第七方面中任一种实现方式所带来的技术效果可参见上述第一方面至第二方面中不同实现方式所带来的技术效果，在此不再赘述。
从以上技术方案可以看出，通过在WLAN通信过程中所传输的无线帧包括第一元素，第二元素和/或第三元素，用于携带分段的信息。该分段的信息可以为多链路设备的站点信息。相比于在单个元素承载信息长度大于该元素所配置的最大长度值的情况下，由于无法承载该过长的信息而导致的无线帧传输失败，通过无线帧中的多个元素承载信息的方式，避免无线帧传输失败，提升通信效率。
附图说明
图1为本申请实施例通信系统的一个示意图；
图2为本申请实施例多链路关联的一个示意图；
图3为本申请实施例提供的无线帧的一个示意图；
图4为本申请实施例提供的无线帧的另一个示意图；
图5为802.11ai中提供的分段传输的示意图；
图6为802.11ai中提供的分段传输的另一示意图；
图7为一种分段传输的示意图；
图8为本申请实施例提供的无线帧的一个示意图；
图9为本申请实施例提供的无线帧传输方法的流程示意图；
图10为本申请实施例提供的分段元素的格式示意图；
图11为本申请实施例提供的无线帧采用Multiple BSSID element传输的示意图；
图12为本申请实施例提供的无线帧采用Multiple BSSID element传输的示意图；
图13为本申请实施例提供的通信装置的一个示意图；
图14为本申请实施例提供的通信装置的另一个示意图。
具体实施方式
本申请中，除特殊说明外，各个实施例之间相同或相似的部分可以互相参考。在本申请中各个实施例、以及各实施例中的各个实施方式/实施方法/实现方法中，如果没有特殊说明以及逻辑冲突，不同的实施例之间、以及各实施例中的各个实施方式/实施方法/实现方法之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例、以及各实施例中的各个实施方式/实施方法/实现方法中的技术特征根据其内在的逻辑关系可以组合形成新的实施例、实施方式、实施方法、或实现方法。以下所述的本申请实施方式并不构成对本申请保护范围的限定。
可以理解，本申请实施例中的一些可选的特征，在某些场景下，可以不依赖于其他特征，比如其当前所基于的方案，而独立实施，解决相应的技术问题，达到相应的效果，也可以在某些场景下，依据需求与其他特征进行结合。相应的，本申请实施例中给出的装置也可以相应的实现这些特征或功能，在此不予赘述。
在本申请的描述中，除非另有说明，"多个"是指两个或多于两个。"以下至少一项(个)"或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。
另外，为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了"第一"、"第二"等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解"第一"、"第二"等字样并不对数量和执行次序进行限定，并且"第一"、"第二"等字样也并不限定一定不同。同时，在本申请实施例中，"示例性的"或者"例如"等词用于表示作例子、例证或说明。本申请实施例中被描述为"示例性的"或者"例如"的任何实施例或实现方式方案不应被解释为比其它实施例或实现方式方案更优选或更具优势。确切而言，使用"示例性的"或者"例如"等词旨在以具体方式呈现相关概念，便于理解。
为便于理解本申请实施例提供的方法，下面将对本申请实施例提供的方法的系统架构进行说明。可理解的，本申请实施例描述的系统架构是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定。
本申请提供的技术方案可以适用于WLAN场景，例如可以适用于IEEE 802.11系统标准，例如802.11a/b/g标准、802.11n标准、802.11ac标准、802.11ax标准，或其下一代，例如802.11be标准或更下一代的标准中。
虽然本申请实施例主要以部署WLAN网络，尤其是应用IEEE 802.11系统标准的网络为例进行说明，本领域技术人员容易理解，本申请涉及的各个方面可以扩展到采用各种标准或协议的其它网络，例如，BLUETOOTH(蓝牙),高性能无线LAN(high performance radio LAN，HIPERLAN)(一种与IEEE 802.1 1标准类似的无线标准，主要在欧洲使用)以及广域网(WAN)、个人区域网(personal area network,PAN)或其它现在已知或以后发展起来的网络。因此，无论使用的覆盖范围和无线接入协议如何，本申请提供的各种方面可以适用于任何合适的无线网络。
本申请实施例还可以适用于物联网(internet of things，IoT)网络或车联网(Vehicle to X，V2X)等无线局域网系统中。当然，本申请实施例还可以适用于其他可能的通信系统，例如，长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、第五代(5th generation，5G)通信系统,以及未来的第六代(6th generation，6G)通信系统等。
上述适用本申请的通信系统仅是举例说明，适用本申请的通信系统不限于此，在此统一说明，以下不再赘述。
本申请实施例所提供的无线帧发送方法及装置，以及无线帧接收方法及装置可以应用于无线通信系统,该无线通信系统可以为无线局域网(wireless local area network，WLAN)或蜂窝网，该方法可以由无线通信系统中的通信设备或通信设备中的芯片或处理器实现，该通信设备可以是一种支持多条链路并行进行传输的无线通信设备，例如，称为多链路设备(multi-link device，MLD)或多频段设备(multi-band device)。相比于仅支持单条链路传输的设备来说，多链路设备具有更高的传输效率和更高的吞吐量。
请参阅图1，为本申请实施例提供的通信系统的一个示意图。
如图1所示，该通信系统主要包括至少一个多链路接入点设备(Multi-link AP device)以及至少一个多链路非接入点站点设备(Multi-link non-AP STA device)(简称为多链路站点设备)，其中，多链路接入点设备和多链路站点设备可以统称为多链路设备。下面将对多链路设备进行介绍。
一般的，多链路设备包括一个或多个隶属的站点(affiliated station,记为affiliated STA)，隶属的STA是一个逻辑上的站点，可以工作在一条链路上。其中，隶属的站点可以为接入点(access point，AP)或非接入点站点(non-access point station,non-AP STA)。为描述方便，本申请将隶属的站点为AP的多链路设备可以称为多链路AP或多链路AP设备(multi-link AP device)或AP多链路设备(AP multi-link device)，隶属的站点为non-AP STA的多链路设备(multi-link non-AP STA device)可以称为多链路STA或多链路STA设备或STA多链路设备(STA multi-link device)。为描述方便，“多链路设备包括隶属STA”在本申请实施例中也简要描述为“多链路设备包括STA”。
值得注意的是，多链路设备包括多个逻辑站点，每个逻辑站点工作在一条链路上，但允许多个逻辑站点工作在同一条链路上。下文的提到的链路标识表征的是工作在一条链路上的一个站点，也就是说，如果一条链路上有多于1个站点，则需要多于1个链路标识表征他们。下文的提到的链路有时也表示工作在该条链路上的站点。
多链路AP设备与多链路STA在数据传输时，可以采用链路标识来标识一条链路或一条链路上的站点。在通信之前，多链路AP设备与多链路STA设备可以先协商或沟通链路标识与一条链路或一条链路上的站点的对应关系。因此在数据传输中，不需要传输大量的信令信息用来指示链路或链路上的站点，携带链路标识即可，降低了信令开销，提升了传输效率。
一个示例中，多链路AP设备在建立BSS时，发送的管理帧，比如信标(beacon)帧，会携带一个包括多个链路标识信息字段的元素，每个链路标识信息字段可以建议一个链路标识与工作在一个链路上的站点的对应关系。每个链路标识信息字段包括链路标识，还包括：介质接入控制(medium access control,MAC)地址，操作集，信道号中的一个或多个，其中MAC地址，操作集，信道号中的一个或多个可以指示一条链路；另一个示例中，在多链路建立关联过程中，多链路AP设备和多链路站点设备协商多个链路标识信息字段。在后续的通信中，多链路AP设备或者多链路站点设备会通过使用链路标识来表征多链路设备中的一个站点，链路标识还可以表征该站点的MAC地址，工作的操作集，信道号中的一个或多个属性。其中MAC地址，也可以换成关联后多链路AP设备的关联标识。
如果是多个站点工作在一条链路上，那么链路标识(是一个数字的ID)，表征的意义除了包括链路所在的操作集，信道号，还包括工作在该链路上的站点标识，比如站点的MAC地址或者AID。
多链路设备可以遵循802.11系列协议实现无线通信，例如，遵循极高吞吐率(extremely high throughput，EHT)站点，或遵循基于802.11be或兼容支持802.11be的站点，实现与其他设备的通信，当然其他设备可以是多链路设备，也可以不是多链路设备。
本申请涉及的non-AP MLD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通讯功能的用户终端、用户装置，接入装置，订户站，订户单元，移动站，用户代理，用户装备，其中，用户终端可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、物联网(internet of things，IoT)设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(user equipment，UE)，移动台(mobile station，MS)，终端(terminal)，终端设备(terminal equipment)，便携式通信设备，手持机，便携式计算设备， 娱乐设备，游戏设备或系统，全球定位系统设备或被配置为经由无线介质进行网络通信的任何其他合适的设备等。此外，non-AP MLD可以支持802.11be制式或者802.11be的下一代WLAN制式。non-AP MLD也可以支持802.11ax、802.11ac、802.11n、802.11g、802.11b及802.11a等多种WLAN制式。
本申请实施例涉及的AP MLD可以为一种部署在无线通信网络中为其关联的non-AP提供无线通信功能的装置，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 MLD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 MLD可以是带有Wi-Fi芯片的基站、路由器、网关、中继器，通信服务器，交换机或网桥等通信设备，其中，所述基站可以包括各种形式的宏基站，微基站，中继站等。此外，AP MLD可以支持802.11be制式或者802.11be的下一代WLAN制式。AP MLD也可以支持802.11ax、802.11ac、802.11n、802.11g、802.11b及802.11a等WLAN制式。
如前述描述，多链路接入点设备和多链路站点设备之间可以通过多种无线帧进行通信，例如关联请求帧、重关联请求帧、关联响应帧、重关联响应帧、探测响应帧等，其中，不同的无线帧都可以携带有多链路元素(multi-link element,MLE)，用以通过MLE承载多链路设备的站点信息。其中，MLE也可以称为多链路信息单元。
下面将描述多链路设备的关联过程为例，描述关联过程中所使用的关联请求帧的具体实现。如图2所示，在多链路建立(或多链路关联)过程中，多链路站点设备中的一个站点可以向多链路接入点设备中的一个接入点发送关联请求帧，所述关联请求帧中携带MLE来承载多链路站点设备的当前站点的信息以及多链路设备中其他站点的信息。同样地，接入点向站点回复的关联响应帧中也可以携带MLE来承载多链路接入点设备的当前接入点的信息以及多链路设备中其他接入点的信息。
如图3所示，为MLE的帧结构的一个示意图。其中，MLE包括元素标识(Element ID)字段(例如，取值可以为图3所示的255)、长度值(Length)字段、元素标识扩展(Element ID Extension)字段、多链路控制(Multi-Link Control)字段、公共信息(Common Info)字段和链路信息(Link Info)字段。其中，Common Info字段携带多链路设备中多个站点的共同的信息，以及多链路设备本身的信息；Link Info字段携带多链路设备中每条链路上的站点的信息；Multi-Link Control字段携带多链路元素的类型，以及Common Info中哪些字段(present)出现及哪些字段不出现的指示信息。
进一步的，如图3所示，该Link Info字段还可以包括一个或多个每个-站点配置(Per-STA Profile)字段，图3中以Per-STA Profile字段数量为x(x大于1)为例。其中，每个Per-STA Profile字段还可以进一步包括子元素标识(Subelement ID)字段(例如，取值可以为图3所示的0)、长度值(Length)字段、数据(Data)字段。
进一步的，如图3所示，Data字段还可以包括站点控制(STA Control)字段、站点信息(STA Info)字段、站点配置(STA Profile)字段。
进一步的，如图3所示，STA Profile字段包括多个域(field)，图3中以field数量为m(x大于1)为例；STA Profile字段还包括多个元素(Element)，图3中以Element数量为n(n大于1)为例。此外，STA Profile字段还包括可能存在的(if present)非继承元素(Non-inheritance element)。
然而，如图3所示，MLE所能够携带的内容的长度是有限的，具体的长度由MLE中的Length字段指示。具体地，Length字段指示MLE中Length字段之后的字节数。例如，MLE中 Length字段的长度为8比特，所能够指示的长度为0到255字节，但是MLE所需要携带的信息的长度可能超过255字节，导致无法仅使用一个MLE来携带多链路设备的信息。
此外，多链路设备中每条链路上的站点的信息，是携带在Link Info中的Per-STA Profile这个子元素(subelement)中的，而每个Per-STA Profile也是有长度限制的。例如，Per-STA Profile中Length字段的长度为8比特，使得Data部分最多也是只能携带255字节，但每条链路上的站点的信息可能长于255字节，导致无法仅使用一个Per-STA Profile来携带每条链路上的站点信息。
在描述本申请实施例之前，先对WLAN通信系统中基本服务集(basic service set，BSS)场景涉及的相关技术进行介绍。
如图4所示，该无线帧结构包括相邻的两个多基本服务集标识元素(Multiple BSSID element)。在每一个Multiple BSSID element中，元素标识(Element ID)字段(例如，取值可以为图3所示的71)、Length字段、最大BSS标识指示(Max BSSID Indicator)字段、非传输BSSID配置子元素(Nontransmitted BSSID Profile subelement，或称为Nontransmitted BSSID Profile)字段,且Nontransmitted BSSID Profile字段的个数为0个或多个(0or more Nontransmitted BSSID Profile)，图4中以Nontransmitted BSSID Profile subelement字段数量为i(i大于1)为例。
进一步的，如图4所示，在第i个Nontransmitted BSSID Profile subelement(BSS i)中包括Subelement ID字段(例如取值可以为0)、Length字段、Data字段。
进一步的，如图4所示，在Data字段中包括非传输BSSID能力元素(Nontransmitted BSSID Capability element)字段、服务集标识元素(SSID element)、多个BSS ID索引元素(Multiple BSSID-Index element)，以及一个或多个Element和Non-inheritance element(if present)。在图4所示的示例中，第一个Multiple BSSID element中的第i个Nontransmitted BSSID Profile subelement包括第一个至第L(L大于1)个Element，第二个Multiple BSSID element中的第i个Nontransmitted BSSID Profile subelement包括第L+1个至第Y(Y大于L)个Element。
具体地，Multiple BSSID element是用来携带一个AP所隶属的多链路设备中的多个虚拟AP的信息的，且Length字段为8个比特，指示最多可承载255字节。但是，多个虚拟AP信息的长度可能超过255字节，因此需要用多个multiple BSSID element来携带多个虚拟AP的信息。如图4所示，第一个multiple BSSID element携带了第一个BSS到第i个BSS的第一部分的信息；第二个multiple BSSID element携带了第i个BSS的剩余部分的信息以及第i+1个BSS的信息。可以将两个multiple BSSID element的内容拼接起来，从而获得第一个到第i+1个BSS的信息，并且每个BSS的信息以Nontransmitted BSSID Capability element开始。
然而，在图4所示的示例中，由于BSS i的信息分布在两个multiple BSSID element中，站点需要通过读取第二个multiple BSSID element中的Nontransmitted BSSID Profile subelement的Data部分的第一个信息单元，根据第一个信息单元是否是Nontransmitted BSSID Capability element来判断这是一个新的BSS的信息，还是上一个BSS的剩余部分的信息。
但是，对于图3所示MLE的帧结构而言，Per-STA Profile subelement的第一个字段是STA Control域，并不是信息单元。STA Control域携带的内容是变化的，并不像某个固定的信息单元，其第一个字节(element ID)的内容是固定的。因此，无法通过读取第二个MLE中的Per-STA Profile的Data部分的第一个字节，判断这是一个新的AP的信息，还是上一个AP的剩余部分的信息。
也就是说，当前Multiple BSSID element中所使用的通过多个BSSID element承载同一AP的信息的实现方式，并不适用于MLE中通过多个MLE承载同一链路的站点信息的过程。
与Multiple BSSID element类似的element中，也会出现一个element无法承载完所有信息的问题，因此，当前在WLAN的无线帧传输过程中，亟需一种解决一个元素无法承载单链路设备或者多链路设备的信息而导致无线帧传输失败的方案。
现有的802.11ai标准中，提供了一种信息分段的机制，如图5所示：
若Data部分的长度为L字节，则可以将所述L字节分为M+N个部分。若所述信息元素不包含Element ID Extension域，则：
Figure PCTCN2022109459-appb-000008
Figure PCTCN2022109459-appb-000009
第一个部分承载在信息元素中(Element ID的取值表示其为信息元素)，其余部分承载在一个或多个分段信息元素(fragment element)中，所述分段信息元素是信息元素的一种，其element ID的值为242，表示该信息元素是分段信息元素，该element ID表示为分段标识符(fragment ID，FID)。另外，所述M个部分所对应的信息元素的长度为255字节，所述N个部分(若存在)所对应的信息元素的长度m小于255字节。
若所述信息元素包含Element ID Extension域，如图6所示，则：
Figure PCTCN2022109459-appb-000010
Figure PCTCN2022109459-appb-000011
但是该802.11ai标准中提及的信息分段的机制，不适用元素的数据部分还进一步包括指示字段和子元素的情况，因为在这种场景下，信息只能携带于该元素的子元素的数据部分，而指示字段是不能用于携带信息的，因此802.11ai中提供的公式均不适用，无法解决此情况下信息分段传输的问题。
以一种具体的元素为例进行说明：如前所述的图3所示的多基本服务集标识元素(Multiple BSSID element)，它是用来承载与本AP属于同一个多基本服务集标识集合(Multiple BSSID Set)中的AP的信息的。
Multiple BSSID element包括MaxBSSID Indicator字段以及一个或多个Nontransmitted BSSID Profile子元素，每个Nontransmitted BSSID Profile子元素携带与本AP属于同一个多基本服务集标识集合(Multiple BSSID Set)中的AP的信息。在Nontransmitted BSSID Profile子元素中，前面三个信息元素为Nontransmitted BSSID capability element,SSID element和Multiple BSSID-Index element，后面还可以包括若干其他的element。
在所述若干其他的element中，有些element的长度可能比较长，会超过255字节。若采用802.11ai提供的信息分段机制对其进行分段，则会出现长度(Length字段所指示的长度)与实际不匹配的问题。
如图7所示，假设element i的长度超过了255字节，需要分段，按照802.11ai中提供的分段机制，第一个分段所对应的信息元素中的Length字段的长度应设置为254，但受限于Multiple BSSID element的最大长度限制，第一个分段所对应的信息元素中实际携带的Data部分的长度小于254字节，与Length字段所指示的长度不一致。当传统站点解析所述Multiple BSSID element的时候，读取到element i的第一个分段所对应的信息元素时，发现Element ID或Element ID Extension对应其不支持的信息元素，则会根据Length字段的指示跳过所述信息元素，但Length字段所指示的长度大于Data字段的实际长度，使得传输站点根据Length字段的指示跳过的位置不对，最终导致解析错误。
为了解决上述问题，本申请提供了一种无线帧发送方法及装置、无线帧接收方法及装置，用于通过无线帧中的至少两个元素承载超过一个元素所能携带的最大长度的信息的方式，并且，在用至少两个元素承载信息的时候，还考虑除去该元素中的一些指示字段的开销后承载信息，以实现单链路站点设备或多链路站点设备的信息的承载，避免无线帧传输失败和接收端的错误解析，提升通信效率。
换句话说，本申请提供在信息在某个元素中的子元素中的信息部分进行分段传输的机制，以实现单链路或者多链路站点设备的信息的承载，避免无线帧传输失败和接收端的错误解析，提升通信效率。
实施例一
本申请提供的一种无线帧的结构如图8所示：
本实施例中，待分段发送的信息在多个元素中进行发送，该待分段发送的信息是一个信息元素的信息/数据字段部分，其长度为L个字节，不包括信息元素本身的element ID字段,Length字段，或也不包括Element ID Extension字段。每个元素中携带一个分段的信息。
一种实现中，所述信息元素为多链路元素Multi-Link element；另外的实现方式中，所述信息元素为802.11标准定义的所有的可以被分段的元素(fragmentable element)。
其中，元素中携带信息部分，例如element 22中携带information 23，而该元素22携带在另一个元素element 2的信息部分information 21中进行传输。为了区分这两种类型的元素，在本申请中，将携带于一个元素的信息部分中的另一个元素称之为子元素，本申请将这种场景称之为至少两层element嵌套的架构，例如图8中的元素element 2的信息部分information 21中的element 22，称为element2和element 22是两层element嵌套。应理解，本申请是在描述至少两层element嵌套的架构下，如何实现信息分段传输的问题，元素和子元素都不用于限定元素的名称。
应理解，某个element中可以携带的信息部分的长度，是由其中的长度字段所指示的，如前所述，目前一个element中的长度字段被设置为255，以指示后的信息部分的长度等于255个字节。
在本申请提供的至少两层element嵌套的架构下，每层element中都携带有length字段，如果都像现有技术那样，设置为255个字节，这必然会引起错误。因此，在本申请中，最上层的element对应的length字段的值设置为255，嵌套在该element所包括的子element所对应的length字段的值小于255个字节，或者说该element的信息字段所能携带的信息的长度小于255个字节；具体的，需要用255减去该element所包括的指示字段的长度。
例如图8中的，element 2，其包括的length 21的值设置为255，而该element 2所包括的信息部分information 21中的子元素element 22，其包括的length 23的取值则为255减去subelement ID的字节数1，减去length 22的字节数1，再减去element 22所包括的element ID的字节数1，即length 23的取值应该为255-3＝252，也即information 23所能携带的信息的长度为252；如果element 22还包括extension ID时，还应减去extension ID的字节数1，即255-4＝251，information 23所能携带的信息的长度为251。
应理解，在携带分段传输的第一信息部分的第一个元素中，还可能携带其他的子元素，因此，用于传输分段信息的子元素，其中能携带的第一信息部分的长度还需要减去其他子元素所占的字节数；
还应理解，最后一个用于携带分段信息的元素，其所包括的子元素的信息字段所携带的分段信息的长度加上该元素中的指示字段的长度，小于或等于该元素的length字段所指示的长度255的字节。
实施本申请实施例一，可以通过多个元素携带原本一个元素承载不完的信息，并且携带信息部分的长度充分考虑除去一个元素中一些固有的指示开销，使得信息可以正确被分段携带，接收端也不会出现解析错误。
实施例二
以下结合无线帧的发送和接收流程，来进一步说明本申请实施例。
参见图9，为本申请提供的一种无线帧发送方法的流程示意图，该方法实施例包括：
步骤S101：发送装置生成无线帧，所述无线帧包括一个第一元素，所述无线帧还包括第二元素、第三元素中的至少一种；
所述第一元素包括第一长度字段以及位于所述第一长度字段之后第一信息部分；所述第一信息部分包括第一指示字段和第一子元素，所述第一子元素包括第一子指示字段和第一信息字段；
所述第二元素包括第二长度字段以及位于所述第二长度字段之后第二信息部分；所述第二信息部分包括第二指示字段和第二子元素，所述第二子元素包括第二子指示字段和第二信息字段；
所述第三元素包括第三长度字段以及位于所述第三长度字段之后第三信息部分；所述第三信息部分包括第三指示字段和第三子元素，所述第三子元素包括第三子指示字段和第三信息字段；
待分段发送的总长度为L个字节的信息携带于所述第一信息字段中，还携带于所述第二信息字段、第三信息字段的至少一项中；
其中，所述第一信息字段携带的信息的长度为K个字节；
所述第二信息字段携带的信息的长度为所述第二信息部分的字节数减去所述第二指示字段和第二子指示字段的字节数之和X个字节；
应理解，这里的第二指示字段和第二子指示字段实质上是第二元素所包括的长度字段之后的所有可能的指示字段的总和，该第二指示字段和第二子指示字段可以概括为指示字段；另一种实现中，第二指示字段和第二子指示字段可以只存在其中之一。
所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度K个字节；或
所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度K个字节，再减去所述第二信息字段携带的信息的长度；
步骤S102：发送装置发送所述无线帧。
步骤S103：接收装置根据所述无线帧获得分段发送的总长度为L字节的信息。
结合图8所示的无线帧，所述无线帧包括一个第一元素(element 1)，所述无线帧还包括第二元素(element 2)、第三元素(element 3)中的至少一种；
所述第一元素(element1)包括第一长度字段(length11)以及位于所述第一长度字段(length11)之后第一信息部分(information11)，当然在所述第一长度字段之前，还包括元素标识符字段(element ID 11)；所述第一信息部分(information11)包括第一指示字段(例如包括subelement ID12和length 12)和第一子元素(element12)，所述第一子元素(element12) 包括第一子指示字段(例如element ID13和length 13)和第一信息字段(information13)；
应理解，这里的第一指示字段和第一子指示字段均为举例，并且，第一指示字段和第一子指示字段也可以概括为第一信息部分所包括的所有指示字段；在实际场景中，第一元素中可以只包括第一指示字段，或者只包括第一子指示字段；当然，第一元素中还可以包括其他的字段，甚至其他的非用于传输本分段信息的元素，均视为第一指示字段和/或第一子指示字段；
同理，若存在第二元素时，所述第二元素(element 2)包括第二长度字段(length21)以及位于所述第二长度字段(length21)之后第二信息部分(information21)，当然在所述第一长度字段之前，还包括元素标识符字段(element ID 21)；所述第二信息部分(information 21)包括第二指示字段(例如包括subelement ID22和length 22)和第二子元素(element 22)，所述第二子元素(element 22)包括第二子指示字段(例如element ID23和length 23)和第二信息字段(information 23)；
应理解，这里的第二指示字段和第二子指示字段均为举例，并且，第二指示字段和第二子指示字段也可以概括为第二信息部分所包括的所有指示字段；在实际场景中，第二元素中可以只包括第二指示字段，或者只包括第二子指示字段；当然，第二元素中还可以包括其他的字段，甚至其他的非用于传输本分段信息的元素，均视为第二指示字段和/或第二子指示字段；
同理，若存在第三元素时，所述第三元素(element 3)包括第三长度字段(length 31)以及位于所述第三长度字段(length 31)之后第三信息部分(information31)，当然在所述第三长度字段之前，还包括元素标识符字段(element ID 31)；所述第三信息部分(information 31)包括第三指示字段(例如包括subelement ID32和length 32)和第三子元素(element 32)，所述第三子元素(element 32)包括第三子指示字段(例如element ID33和length 33)和第三信息字段(information 33)；
应理解，这里的第三指示字段和第三子指示字段均为举例，并且，第三指示字段和第三子指示字段也可以概括为第三信息部分所包括的所有指示字段；在实际场景中，第三元素中可以只包括第三指示字段，或者只包括第三子指示字段；当然，第三元素中还可以包括其他的字段，甚至其他的非用于传输本分段信息的元素，均视为第三指示字段和/或第三子指示字段；
待分段发送的总长度为L个字节的信息携带于所述第一信息字段(information 13)中，还携带于所述第二信息字段(information 23)、第三信息字段(information 33)的至少一项中；
一种实现方式中，所述第一子元素为信息元素，所述第二子元素、所述第三子元素为分段元素。
具体的，所述第一子元素包括元素标识符element ID为待分段的信息所述的信息元素的ID；所述第二子元素、第三子元素包括element ID，其取值为242，表示所述第二子元素和所述第三子元素为分段信息元素，此时分段element ID又可以称为fragment ID(FID)。
所述第一长度字段的取值为255，指示所述第一信息部分的长度为255个字节；所述第一指示字段的长度为A1字节，例如图8中，第一指示字段包括subelement ID12和length 12，该subelement ID12和length 12各占一个字节，则A1为2字节；所述第一子指示字段的长度为A2字节，例如图8中，第一子指示字段包括element ID13和length 13，element ID13和length 13各占一个字节，则A2为2字节，所述第一信息字段携带的信息的长度K为255-A1-A2＝255-2-2＝251字节。应理解，这里的第一指示字段仅为举例，在实现中，不同的 element中还会存在其他的可能性，例如，在如图8的element1中，其包括的length 11之后，与information11之间，还包括其他的占A3字节的指示字段，那么第一信息字段information13携带的信息的长度K＝255-A1-A2-A3；再如，element 1的information11所携带的subelement ID12和length 12之后，在element12之前，可能还包括携带其他信息元素的element，该element与element12的功能不同，不是用于携带分段信息的，它所占的字节假设为A4，那么第一信息字段information13携带的信息的长度K＝255-A1-A2-A3-A4；再如，element12所携带的element ID13和length 13之后，information13之前，还包括Element ID Extension字段，Element ID Extension字段所占字节为A5，则那么第一信息字段information13携带的信息的长度K＝255-A1-A2-A3-A4-A5。
所述第二长度字段的取值为255，指示所述第二信息部分的长度为255个字节；所述第二指示字段的长度为X1字节，所述第一子指示字段的长度为X2字节，所述第二信息字段携带的信息的长度为(255-X1-X2)字节。
例如图8中，第二指示字段包括subelement ID22和length 22，该subelement ID22和length 22各占一个字节，则X1为2字节；所述第二子指示字段的长度为X2字节，例如图8中，第二子指示字段包括element ID23和length 23，element ID23和length 23各占一个字节，则X2为2字节，所述第二信息字段携带的信息的长度为255-X1-X2＝255-2-2＝251字节。应理解，这里的第一指示字段仅为举例，在实现中，不同的element中还会存在其他的可能性，例如，在如图8的element2中，其包括的length 21之后，与information21之间，还包括其他的占X3字节的指示字段，那么第二信息字段information23携带的信息的长度K＝255-X1-X2-X3；当然，作为传输分段信息的第二元素，element 2的information21所携带的subelement ID22和length 22之后，在element22之前，不包括携带其他信息元素的element。
待分段发送的信息还将在第二元素中携带，其中，所述第二元素的个数为M，M的取值如下：
Figure PCTCN2022109459-appb-000012
其中，
Figure PCTCN2022109459-appb-000013
表示向下取整。
一种实现中，第二指示字段所指示的第二信息部分的长度＝255个字节，则第二元素的个数
Figure PCTCN2022109459-appb-000014
应理解，当M的取值为1的时候，表示只有一个第二元素。
其中，所述第三元素的个数
Figure PCTCN2022109459-appb-000015
或者
Figure PCTCN2022109459-appb-000016
一种实现中，第二指示字段所指示的第二信息部分的长度＝255个字节，则第三元素的个数
Figure PCTCN2022109459-appb-000017
或者
Figure PCTCN2022109459-appb-000018
应理解，所述N的取值为0的时候，表示不存在第三元素。
还应理解，上述M的取值可以为0，N的取值为1，表示除开第一元素之外，只有另一个元素用于传输分段信息，且该另一个元素中携带的信息部分的长度小于255-X。
当存在第三元素时，所述第三信息字段携带的信息的长度为L-K-(第二指示字段所指示的第二信息部分的长度-X)×M个字节。
一种实现中，第二指示字段所指示的第二信息部分的长度＝255个字节，则第三信息字段携带的信息的长度为L-K-(255-X)×M个字节。
具体实现中，所述无线帧接收装置根据无线帧中的第一元素，第二元素和/或第三元素，识别第一元素的第一子元素的element ID，第二元素的第二子元素的element ID和/或第三元素的第三子元素的element ID，发现第二子元素和第三子元素的element ID为242(表示是Fragment element)，第一子元素的element ID是正常的信息元素的ID，以获知第一元素的第一信息字段，第二元素的第二信息字段和/或第三元素的第三信息字段中携带的是同一信息元素的分段信息，以便将它们进行拼接，获得完整的L字节的信息。应理解，所述第一元素，第二元素和/或第三元素是相邻的元素。
识别其中的element ID，以获知哪些第一元素，第二元素和/第三元素中的第一信息字段，第二信息字段和/或第三信息字段中携带的是同一信息元素的分段信息，以便将它们进行拼接，获得完整的L字节的信息。应理解，所述第一元素，第二元素，第三元素是相邻的元素。
实施本申请实施例二，可以通过多个元素携带原本一个元素承载不完的信息，并且携带信息部分的长度充分考虑除去一个元素中一些固有的指示开销，使得信息可以正确被分段携带，接收端也不会出现解析错误。
实施例三
下面介绍当所述分段信息携带于Multiple BSSID element中的Nontransmitted BSSID Profile子元素中时，也即前述的实施例中，第一元素，第二元素，第三元素为多BSSID元素Multiple BSSID element时，具体的分段信息传输的实现方法。
假设待分段传输的信息的长度为L个字节，可以将所述L个字节分成第一信息，第二信息部分和/或第三信息部分，分别携带在多个Multiple BSSID element中进行分段传输。
一种实现方式是：第一信息部分携带在一个信息元素中(或者说，携带在一个元素标识符与信息元素的元素标识相同的信息元素中)，其余的第二信息部分和/或第三信息部分携带在一个或多个分段元素(Fragment element)中。Fragment element的格式如图10所示：
第一部分信息的长度为：第一个携带所述信息元素的Multiple BSSID element所能够携带所述信息元素的最大长度。此时第一个携带所述信息元素的Multiple BSSID element的Length字段的取值为255。换言之，第一信息部分的长度为，当携带所述信息元素的第一信息部分的Multiple BSSID element中的Length字段(第一个Length字段，即，用于表征Multiple BSSID element的长度的字段)的取值为255时，除了所述Multiple BSSID element所包括的指示信息之外，所能携带的信息部分的最大长度。假设第一信息部分的长度为K字节。
而第二信息部分携带在M个Multiple BSSID element中，
Figure PCTCN2022109459-appb-000019
Figure PCTCN2022109459-appb-000020
表示对(L-K)/(255-X)的结果进行向下取整操作。
若M>0，所述M个部分中的每个信息部分的长度为(255-X)个字节，分别由一个Multiple BSSID element携带。每个信息部分的长度之所以用255减去X字节，是因为携带所述M个第二元素中，每个第二元素除了要携带信息部分之外，还需要携带一些固定的开销，这些固 定开销的长度由第二元素的元素类型决定。所述固定的开销可以包括：
MaxBSSIDIndicator，1字节；
Nontransmitted BSSID Profile子元素中的subelement ID字段，1字节；
Nontransmitted BSSID Profile子元素中的Length字段，1字节；
Multiple BSSID element所包括的element中，用于携带所述信息部分的所述M个部分中的每个部分的Fragment element的Element ID字段，1字节；
用于携带所述信息元素的所述M个部分中的每个部分的Fragment element的Length字段，1字节；
因此，X的取值为以上除了信息部分之外的各个指示字段的字节数总和为5个字节；
携带在Fragment element中的所述信息元素的所述M个部分中的每个部分的长度为255-X＝255-5＝250个字节。因此，用于携带所述信息部分的所述M个部分中的每个部分的Fragment element的Length字段的取值为250个字节。
上述的固定开销仅为举例，实现中，固定开销还可以包括所述第二元素中必须要携带的字段。例如Multiple BSSID element中必须携带1字节的最大BSSID指示MaxBSSID Indicator字段。
此外，而第三信息部分携带在N个Multiple BSSID element中，
Figure PCTCN2022109459-appb-000021
或者
Figure PCTCN2022109459-appb-000022
若N＝1，则所述N个部分为所述信息元素的Information部分被分段之后的最后一个部分，其长度为L-K-250*M。
具体的，如图11所示，待分段传输的信息总共为L个字节分成了多段，其中，第一段为K字节，它使得携带第一段的Multiple BSSID element的Length为255的时候，除开该Multiple BSSID element已经携带的指示字段或者其他元素所包括的字节数之后，剩余的K个字节用于携带分段信息的第一部分信息。最后一段分段传输的信息部分的长度为m字节，m<250。除开第一段和最后一段，中间段的信息部分，携带M个element中的information字段中，其长度为250字节，该M个element分别携带于M个Multiple BSSID element中。
应理解，待分段传输的信息，也可以称为待分段传输的数据，前述携带分段信息的信息字段，也可以称为数据字段。
具体实现中，接收端根据无线帧中的第一Multiple BSSID element，第二Multiple BSSID element和/或第三Multiple BSSID element，识别第一Multiple BSSID element的第一子元素的element ID，第二Multiple BSSID element的第二子元素的element ID和/或第三Multiple BSSID element的第三子元素的element ID，发现第二子元素和第三子元素的element ID为242(表示是Fragment element)，第一子元素的element ID是正常的信息元素的ID，以获知第一Multiple BSSID element的第一信息字段，第二Multiple BSSID element第二信息字段和/或第三Multiple BSSID element的第三信息字段中携带的是同一信息元素的分段信息，以便将它们 进行拼接，获得完整的L字节的信息。应理解，所述第一Multiple BSSID element，第二Multiple BSSID element和/或第三Multiple BSSID element是相邻的元素。
实施本申请实施例三，可以通过多个Multiple BSSID element携带原本一个Multiple BSSID element承载不完的信息，并且携带信息部分的长度充分考虑除去Multiple BSSID element中一些固有的指示开销，使得信息可以正确被分段携带，接收端也不会出现解析错误。
实施例四
第一元素，第二元素和/或第三元素的具体实现可以为Neighbor Report element,如图12所示：
待分段发送的信息在Neighbor Report element中分段携带的实现方式与前述的在Multiple BSSID element的实现方式类似，在此不再赘述。需要说明的是，该Neighbor Report element中必须携带的指示字段为元素标识符element ID和长度Length字段，基本服务集标识符BSSID，基本服务集标识符信息BSSID information，操作类别Operating Class,信道编号Channel Number,物理层类型PHY Type字段，一共15字节。因此，Neighbor Report element的optional subelements字段中携带的信息部分的长度为255-X，X＝15。因此，M个第二元素Neighbor Report element中的每个Fragment element的Length字段的取值为255-X＝255-15＝240个字节。当然，第一个Neighbor Report element的携带的信息部分的长度为K＝255-A字节，A的值大于等于X。
当然，最后一个Neighbor Report element的携带的信息部分的长度为L-K-250*M个字节。
具体实现中，接收端根据无线帧中的第一Neighbor Report element，第二Neighbor Report element和/或第三Neighbor Report element，识别第一Neighbor Report element的第一子元素的element ID，第二Neighbor Report element的第二子元素的element ID和/或第三Neighbor Report element的第三子元素的element ID，发现第二子元素和第三子元素的element ID为242(表示是Fragment element)，第一子元素的element ID是正常的信息元素的ID，以获知第一Neighbor Report element的第一信息字段，第二Neighbor Report element第二信息字段和/或第三Multiple BSSID element的第三信息字段中携带的是同一信息元素的分段信息，以便将它们进行拼接，获得完整的L字节的信息。应理解，所述第一Neighbor Report element，第二Neighbor Report element和/或第三Neighbor Report element是相邻的元素。
实施本申请实施例四，可以通过多个Neighbor Report element携带原本一个Neighbor Report element承载不完的信息，并且携带信息部分的长度充分考虑除去Neighbor Report element中一些固有的指示开销，使得信息可以正确被分段携带，接收端也不会出现解析错误。
上面从方法的角度对本申请进行描述，下面将通过装置的角度对本申请进一步介绍。
请参阅图13，为本申请实施例提供的一种通信装置1000的一个示意图，其中，该通信装置1000包括处理单元1001和收发单元1002。
具体地，该通信装置1000具体可以为无线帧发送装置，用于实现前述任意实施例中的无线帧发送方法。相应的，该处理单元1001和收发单元1002执行以下操作：
处理单元1001生成无线帧，所述无线帧包括一个第一元素，所述无线帧还包括第二元素、第三元素中的至少一种；
所述第一元素包括第一长度字段以及位于所述第一长度字段之后第一信息部分；所述第 一信息部分包括第一指示字段和第一子元素，所述第一子元素包括第一子指示字段和第一信息字段；
所述第二元素包括第二长度字段以及位于所述第二长度字段之后第二信息部分；所述第二信息部分包括第二指示字段和第二子元素，所述第二子元素包括第二子指示字段和第二信息字段；
所述第三元素包括第三长度字段以及位于所述第三长度字段之后第三信息部分；所述第三信息部分包括第三指示字段和第三子元素，所述第三子元素包括第三子指示字段和第三信息字段；
待分段发送的总长度为L个字节的信息携带于所述第一信息字段中，还携带于所述第二信息字段、第三信息字段的至少一项中；
其中，所述第一信息字段携带的信息的长度为K个字节；
所述第二信息字段携带的信息的长度为所述第二信息部分的字节数减去所述第二指示字段和第二子指示字段的字节数之和X个字节；
应理解，这里的第二指示字段和第二子指示字段实质上是第二元素所包括的长度字段之后的所有可能的指示字段的总和，该第二指示字段和第二子指示字段可以概括为指示字段；另一种实现中，第二指示字段和第二子指示字段可以只存在其中之一。
所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度K个字节；或
所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度K个字节，再减去所述第二信息字段携带的信息的长度；
收发单元1002发送所述无线帧。
另一种实现中，上述通信装置1000具体可以为无线帧接收装置，用于实现前述任意实施例中的无线帧发送方法。相应的，该处理单元1001和收发单元1002执行以下操作：
收发单元1002，用于接收上述的无线帧；
处理单元1001还用于根据所述无线帧获得分段发送的总长度为L字节的信息。
具体实现中，所述处理单元1001根据无线帧中的第一元素，第二元素和/或第三元素，识别其中的element ID，以获知哪些第一元素，第二元素和/第三元素中的第一信息字段，第二信息字段和/或第三信息字段中携带的是同一信息元素的分段信息，以便将它们进行拼接，获得完整的L字节的信息。
结合图8所示的无线帧，所述无线帧包括一个第一元素(element 1)，所述无线帧还包括第二元素(element 2)、第三元素(element 3)中的至少一种；
所述第一元素(element1)包括第一长度字段(length11)以及位于所述第一长度字段(length11)之后第一信息部分(information11)，当然在所述第一长度字段之前，还包括元素标识符字段(element ID 11)；所述第一信息部分(information11)包括第一指示字段(例如包括subelement ID12和length 12)和第一子元素(element12)，所述第一子元素(element12)包括第一子指示字段(例如element ID13和length 13)和第一信息字段(information13)；
应理解，这里的第一指示字段和第一子指示字段均为举例，并且，第一指示字段和第一子指示字段也可以概括为第一信息部分所包括的所有指示字段；在实际场景中，第一元素中可以只包括第一指示字段，或者只包括第一子指示字段；当然，第一元素中还可以包括其他的字段，甚至其他的非用于传输本分段信息的元素，均视为第一指示字段和/或第一子指示字段；
同理，若存在第二元素时，所述第二元素(element 2)包括第二长度字段(length21)以及位于所述第二长度字段(length21)之后第二信息部分(information21)，当然在所述第一长度字段之前，还包括元素标识符字段(element ID 21)；所述第二信息部分(information 21)包括第二指示字段(例如包括subelement ID22和length 22)和第二子元素(element 22)，所述第二子元素(element 22)包括第二子指示字段(例如element ID23和length 23)和第二信息字段(information 23)；
应理解，这里的第二指示字段和第二子指示字段均为举例，并且，第二指示字段和第二子指示字段也可以概括为第二信息部分所包括的所有指示字段；在实际场景中，第二元素中可以只包括第二指示字段，或者只包括第二子指示字段；当然，第二元素中还可以包括其他的字段，甚至其他的非用于传输本分段信息的元素，均视为第二指示字段和/或第二子指示字段；
同理，若存在第三元素时，所述第三元素(element 3)包括第三长度字段(length 31)以及位于所述第三长度字段(length 31)之后第三信息部分(information31)，当然在所述第三长度字段之前，还包括元素标识符字段(element ID 31)；所述第三信息部分(information 31)包括第三指示字段(例如包括subelement ID32和length 32)和第三子元素(element 32)，所述第三子元素(element 32)包括第三子指示字段(例如element ID33和length 33)和第三信息字段(information 33)；
应理解，这里的第三指示字段和第三子指示字段均为举例，并且，第三指示字段和第三子指示字段也可以概括为第三信息部分所包括的所有指示字段；在实际场景中，第三元素中可以只包括第三指示字段，或者只包括第三子指示字段；当然，第三元素中还可以包括其他的字段，甚至其他的非用于传输本分段信息的元素，均视为第三指示字段和/或第三子指示字段；
待分段发送的总长度为L个字节的信息携带于所述第一信息字段(information 13)中，还携带于所述第二信息字段(information 23)、第三信息字段(information 33)的至少一项中；
一种实现方式中，所述第一子元素为信息元素，所述第二子元素、所述第三子元素为分段元素。
具体的，所述第一子元素包括元素标识符element ID为待分段的信息所述的信息元素的ID；所述第二子元素、第三子元素包括element ID，其取值为242，表示所述第二子元素和所述第三子元素为分段信息元素，此时分段element ID又可以称为fragment ID(FID)。
所述第一长度字段的取值为255，指示所述第一信息部分的长度为255个字节；所述第一指示字段的长度为A1字节，例如图8中，第一指示字段包括subelement ID12和length 12，该subelement ID12和length 12各占一个字节，则A1为2字节；所述第一子指示字段的长度为A2字节，例如图8中，第一子指示字段包括element ID13和length 13，element ID13和length 13各占一个字节，则A2为2字节，所述第一信息字段携带的信息的长度K为255-A1-A2＝255-2-2＝251字节。应理解，这里的第一指示字段仅为举例，在实现中，不同的element中还会存在其他的可能性，例如，在如图8的element1中，其包括的length 11之后，与information11之间，还包括其他的占A3字节的指示字段，那么第一信息字段information13携带的信息的长度K＝255-A1-A2-A3；再如，element 1的information11所携带的subelement ID12和length 12之后，在element12之前，可能还包括携带其他信息元素的element，该element与element12的功能不同，不是用于携带分段信息的，它所占的字节假设为A4，那么第一信息字段information13携带的信息的长度K＝255-A1-A2-A3-A4；再如，element12所携带的 element ID13和length 13之后，information13之前，还包括Element ID Extension字段，Element ID Extension字段所占字节为A5，则那么第一信息字段information13携带的信息的长度K＝255-A1-A2-A3-A4-A5。
所述第二长度字段的取值为255，指示所述第二信息部分的长度为255个字节；所述第二指示字段的长度为X1字节，所述第一子指示字段的长度为X2字节，所述第二信息字段携带的信息的长度为(255-X1-X2)字节。
例如图8中，第二指示字段包括subelement ID22和length 22，该subelement ID22和length22各占一个字节，则X1为2字节；所述第一子指示字段的长度为X2字节，例如图8中，第二子指示字段包括element ID23和length 23，element ID23和length 23各占一个字节，则X2为2字节，所述第二信息字段携带的信息的长度为255-X1-X2＝255-2-2＝251字节。应理解，这里的第一指示字段仅为举例，在实现中，不同的element中还会存在其他的可能性，例如，在如图8的element2中，其包括的length 21之后，与information21之间，还包括其他的占X3字节的指示字段，那么第二信息字段information23携带的信息的长度K＝255-X1-X2-X3；当然，作为传输分段信息的第二元素，element 2的information21所携带的subelement ID22和length 22之后，在element22之前，不包括携带其他信息元素的element；再如，element22所携带的element ID23和length 23之后，information23之前，还可能包括Element ID Extension字段，Element ID Extension字段所占字节为X4，则那么第一信息字段information23携带的信息的长度K＝255-X1-X2-X3-X4。
待分段发送的信息还将在第二元素中携带，其中，所述第二元素的个数为M，M的取值如下：
Figure PCTCN2022109459-appb-000023
其中，
Figure PCTCN2022109459-appb-000024
表示向下取整。
一种实现中，第二指示字段所指示的第二信息部分的长度＝255个字节，则第二元素的个数
Figure PCTCN2022109459-appb-000025
应理解，当M的取值为1的时候，表示只有一个第二元素。
其中，所述第三元素的个数
Figure PCTCN2022109459-appb-000026
或者
Figure PCTCN2022109459-appb-000027
一种实现中，第二指示字段所指示的第二信息部分的长度＝255个字节，则第三元素的个数
Figure PCTCN2022109459-appb-000028
或者
Figure PCTCN2022109459-appb-000029
应理解，所述N的取值为0的时候，表示不存在第三元素。
还应理解，上述M的取值可以为0，N的取值为1，表示除开第一元素之外，只有另一 个元素用于传输分段信息，且该另一个元素中携带的信息部分的长度小于255-X。
当存在第三元素时，所述第三信息字段携带的信息的长度为L-K-(第二指示字段所指示的第二信息部分的长度-X)×M个字节。
一种实现中，第二指示字段所指示的第二信息部分的长度＝255个字节，则第三信息字段携带的信息的长度为L-K-(255-X)×M个字节。
在具体实现中，上述的第一元素，第二元素，第三元素可以是Multiple BSSID element或者Neighbor Report element。
实施本申请实施例，可以通过多个元素携带原本一个元素承载不完的信息，并且携带信息部分的长度充分考虑除去一个元素中一些固有的指示开销，使得信息可以正确被分段携带，接收端也不会出现解析错误。
需要说明的是，该通信装置1000还可以用于执行前述图1至图12中的其它实施例，并实现相应的有益效果，具体可以参考前述实施例中的描述，此处不再赘述。
参见图14，图14是本申请实施例提供的通信装置1100的结构示意图，该通信装置1100包括处理器1101和收发器1102。
该通信装置1100可以为无线帧发送装置或无线帧接收装置，或其中的芯片。
图14仅示出了通信装置1100的主要部件。除处理器1101和收发器1102之外，该通信装置还可以进一步包括存储器1103、以及输入输出装置(图未示意)。
其中，处理器1101主要用于对通信协议以及通信数据进行处理，以及对整个通信装置进行控制，执行软件程序，处理软件程序的数据。存储器1103主要用于存储软件程序和数据。收发器1102可以包括射频电路和天线，射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
其中，处理器1101、收发器1102、以及存储器1103可以通过通信总线连接。
当通信装置开机后，处理器1101可以读取存储器1103中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器1101对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到通信装置时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器1101，处理器1101将基带信号转换为数据并对该数据进行处理。
在上述任一种实现方式中，处理器1201中可以包括用于实现接收和发送功能的通信接口。例如该通信接口可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口或接口电路可以用于代码/数据的读写，或者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
在上述任一种实现方式中，处理器1201可以存有指令，该指令可为计算机程序，计算机程序在处理器1201上运行，可使得通信装置1200执行上述任一实施例中描述的方法。计算机程序可能固化在处理器1201中，该种情况下，处理器1201可能由硬件实现。
在一种实现方式中，通信装置1200可以包括电路，所述电路可以实现前述任一实施例中发送或接收或者通信的功能。本申请中描述的处理器和通信接口可实现在集成电路(integrated circuit，IC)、模拟IC、无线射频集成电路(radio frequency integrated circuit，RFIC)、混合 信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。该处理器和通信接口也可以用各种IC工艺技术来制造，例如互补金属氧化物半导体(complementary metal oxide semiconductor，CMOS)、N型金属氧化物半导体(nMetal-oxide-semiconductor，NMOS)、P型金属氧化物半导体(positive channel metal oxide semiconductor，PMOS)、双极结型晶体管(bipolar junction transistor，BJT)、双极CMOS(BiCMOS)、硅锗(SiGe)、砷化镓(GaAs)等。
在另一种实现中，所述的射频电路和天线可以独立于进行基带处理的处理器而设置，例如在分布式场景中，射频电路和天线可以与独立于通信装置，呈拉远式的布置。
通信装置可以是独立的设备或者可以是较大设备的一部分。例如所述通信装置可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；
(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据，指令的存储部件；
(3)ASIC，例如调制解调器(Modem)；
(4)可嵌入在其他设备内的模块；
(5)接收机、智能终端、无线设备、手持机、移动单元、车载设备、云设备、人工智能设备等等；
(6)其他等等。
此外，处理器1101可用于进行，例如但不限于，基带相关处理，收发器1102可用于进行，例如但不限于，射频收发。上述器件可以分别设置在彼此独立的芯片上，也可以至少部分的或者全部的设置在同一块芯片上。例如，处理器可以进一步划分为模拟基带处理器和数字基带处理器。其中，模拟基带处理器可以与收发器集成在同一块芯片上，数字基带处理器可以设置在独立的芯片上。随着集成电路技术的不断发展，可以在同一块芯片上集成的器件越来越多，例如，数字基带处理器可以与多种应用处理器(例如但不限于图形处理器，多媒体处理器等)集成在同一块芯片之上。这样的芯片可以称为系统芯片(system on chip)。将各个器件独立设置在不同的芯片上，还是整合设置在一个或者多个芯片上，往往取决于产品实现方式的具体需要。本发明实施例对上述器件的具体实现形式不做限定。
本申请实施例还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程序代码，当上述处理器执行该计算机程序代码时，电子设备执行前述任一实施例中的方法。
本申请实施例还提供一种计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行前述任一实施例中的方法。
本申请实施例还提供一种通信装置，该装置可以以芯片的产品形态存在，该装置的结构中包括处理器和接口电路，该处理器用于通过接收电路与其它装置通信，使得该装置执行前述任一实施例中的方法。
本申请实施例还提供一种WLAN通信系统，包括无线帧发送装置和无线帧接收装置，该无线帧发送装置和该无线帧接收装置可以执行前述任一实施例中的方法。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(Random Access Memory，RAM)、闪存、可擦除可编程只读存储器(Erasable Programmable ROM，EPROM)、电可擦可编程只读存储器(Electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质 读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于核心网接口设备中。当然，处理器和存储介质也可以作为分立组件存在于核心网接口设备中。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机可读存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请的具体实施方式而已，并不用于限定本申请的保护范围，凡在本申请的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请的保护范围之内。

Claims (15)

  1. 一种无线帧发送方法，其特征在于，包括：
    生成无线帧，所述无线帧包括一个第一元素，所述无线帧还包括第二元素、第三元素中的至少一种；
    所述第一元素包括第一长度字段以及位于所述第一长度字段之后第一信息部分；所述第一信息部分包括第一指示字段和第一子元素，所述第一子元素包括第一子指示字段和第一信息字段；
    所述第二元素包括第二长度字段以及位于所述第二长度字段之后第二信息部分；所述第二信息部分包括第二指示字段和第二子元素，所述第二子元素包括第二子指示字段和第二信息字段；
    所述第三元素包括第三长度字段以及位于所述第三长度字段之后第三信息部分；所述第三信息部分包括第三指示字段和第三子元素，所述第三子元素包括第三子指示字段和第三信息字段；
    待分段发送的总长度为L个字节的信息携带于所述第一信息字段中，还携带于所述第二信息字段、第三信息字段的至少一项中；
    其中，所述第一信息字段携带的信息的长度为K个字节；
    所述第二信息字段携带的信息的长度为所述第二信息部分的字节数减去所述第二指示字段和第二子指示字段的字节数之和X个字节；
    所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度；或
    所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度，再减去所述第二信息字段携带的信息的长度；
    发送所述无线帧。
  2. 一种无线帧接收方法，其特征在于，包括：
    接收无线帧，所述无线帧包括一个第一元素，所述无线帧还包括第二元素、第三元素中的至少一种；
    所述第一元素包括第一长度字段以及位于所述第一长度字段之后第一信息部分；所述第一信息部分包括第一指示字段和第一子元素，所述第一子元素包括第一子指示字段和第一信息字段；
    所述第二元素包括第二长度字段以及位于所述第二长度字段之后第二信息部分；所述第二信息部分包括第二指示字段和第二子元素，所述第二子元素包括第二子指示字段和第二信息字段；
    所述第三元素包括第三长度字段以及位于所述第三长度字段之后第三信息部分；所述第三信息部分包括第三指示字段和第三子元素，所述第三子元素包括第三子指示字段和第三信息字段；
    待分段发送的总长度为L个字节的信息携带于所述第一信息字段中，还携带于所述第二信息字段、第三信息字段的至少一项中；
    其中，所述第一信息字段携带的信息的长度为K个字节；
    所述第二信息字段携带的信息的长度为所述第二信息部分总的字节数减去所述第二指示 字段和第二子指示字段的字节数之和X个字节；
    所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度；或
    所述第三信息字段携带的信息的长度为所述总长度L个字节减去所述第一信息字段携带的信息的长度，再减去所述第二信息字段携带的信息的长度；
    根据所述无线帧获得分段发送的总长度为L字节的信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一子元素为信息元素，所述第二子元素、所述第三子元素为分段元素。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述第一子元素包括元素标识符element ID；所述第二子元素、第三子元素包括element ID，其取值为242，表示所述第二子元素和所述第三子元素为分段信息元素。
  5. 如权利要求1至3中任一项所述的方法，其特征在于，所述第一长度字段的取值为255，指示所述第一信息部分的长度为255个字节；所述第一指示字段的长度为A1字节，所述第一子指示字段的长度为A2字节，所述第一信息字段携带的信息的长度K为255-A1-A2字节。
  6. 如权利要求1至3中任一项所述的方法，其特征在于，所述第二长度字段的取值为255，指示所述第二信息部分的长度为255个字节；所述第二指示字段的长度为X1字节，所述第一子指示字段的长度为X2字节，X＝X1+X2，所述第二信息字段携带的信息的长度为(255-X)字节。
  7. 根据权利要求1至3中任一项所述的方法，其特征在于，所述第二元素的个数
    Figure PCTCN2022109459-appb-100001
    其中，
    Figure PCTCN2022109459-appb-100002
    表示向下取整。
  8. 如权利要求1至3中任一项所述的方法，其特征在于，所述第三元素的个数
    Figure PCTCN2022109459-appb-100003
    或者
    Figure PCTCN2022109459-appb-100004
  9. 如权利要求7或8中任一项所述的方法，其特征在于，所述第三信息字段携带的信息的长度为L-K-(第二指示字段所指示的第二信息部分的长度-X)×M字节。
  10. 如权利要求1至8中任一项所述的方法，其特征在于，所述第一元素，第二元素，第三元素均为多BSSID元素Multiple BSSID element，所述X＝5。
  11. 一种无线帧发送装置，其特征在于，所述装置包括收发单元和处理单元，其中，所述装置用于执行权利要求1、3至10中任一项所述的方法。
  12. 一种无线帧接收装置，其特征在于，所述装置包括收发单元和处理单元，其中，所述装置用于执行权利要求2至10中任一项所述的方法。
  13. 一种通信装置，其特征在于，包括至少一个处理器，与存储器耦合；
    所述存储器用于存储程序或指令；
    所述至少一个处理器用于执行所述程序或指令，以使所述装置实现如权利要求1至10中任一项所述的方法。
  14. 一种包含程序指令的计算机程序产品，其特征在于，当所述程序指令在计算机上运行时，使得所述计算机执行如权利要求1至10任一项所述的方法。
  15. 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程序指令，当所述程序指令运行时，使得如权利要求1至10任一项所述的方法被执行。
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