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JP-2026076248-A - Communication method and device

JP2026076248AJP 2026076248 AJP2026076248 AJP 2026076248AJP-2026076248-A

Abstract

[Problem] To provide a communication method and apparatus applicable to multilink devices. [Solution] Method 600 in a wireless communication system includes step 620 in which a first access point (AP) transmits first information to a first station multilink device (STA MLD). The first information indicates whether a key basic service set (BSS) parameter corresponding to at least one AP of the first AP MLD has changed. In this way, if a key BSS parameter corresponding to at least one AP of the first AP MLD has changed, the first STA can know in a timely manner, thereby improving communication reliability. [Selection Diagram] Figure 6

Inventors

  • 淦 明
  • 林 游思
  • ▲楊▼ ▲訊▼
  • 李 云波
  • 郭 宇宸
  • 黄 国▲剛▼

Assignees

  • 華為技術有限公司

Dates

Publication Date
20260511
Application Date
20260121
Priority Date
20220411

Claims (20)

  1. A step of generating first information by a first access point AP of a first access point multilink device AP MLD, wherein the first information indicates whether a key basic service set BSS parameter corresponding to at least one AP of the first AP MLD changes. A communication method comprising the steps of transmitting the first information to a first station multilink device STA MLD by the first AP.
  2. The method according to claim 1, wherein the first information is a count value.
  3. The method according to claim 1 or 2, wherein the value of the first information increases when the key BSS parameter corresponding to at least one AP of the first AP MLD changes.
  4. The method according to claim 1 or 2, wherein if the key BSS parameter corresponding to the AP of the first AP MLD does not change, the value of the first information remains unchanged.
  5. The method according to any one of claims 1 to 4, wherein the first information is transported in a check beacon field.
  6. The method according to claim 5, wherein the check beacon field is transmitted in a traffic instruction map (TIM) frame.
  7. The first information indicates that the key BSS parameter corresponding to the at least one AP of the first AP MLD changes, and the method is: The steps include: receiving a first frame by the first AP, wherein the first frame is for requesting key BSS parameters corresponding to an AP associated with a second STA, and the second STA is a station located in the first STA MLD and associated with the first AP MLD; The method according to any one of claims 1 to 6, further comprising the steps of: transmitting a second frame by the first AP, wherein the second frame includes the key BSS parameter corresponding to the AP associated with the second STA.
  8. The method according to claim 7, wherein the second STA is all the STAs of the first STA MLD.
  9. The method according to any one of claims 1 to 8, wherein the key BSS parameter includes one or more of the following: inclusion of a channel switching notification element, inclusion of an extended channel switching notification element, modification of the extended distributed channel access EDCA parameter element, inclusion of a quiet element, modification of the direct sequence spread spectrum DSSS parameter set, modification of the contention-free CF parameter set element, modification of the high-throughput HT operation element, inclusion of a broadband channel switching element, inclusion of a channel switching wrapper element, inclusion of an operation mode notification element, inclusion of a quiet channel element, modification of the very high-throughput VHT operation element, modification of the high-efficiency HE operation element, insertion of a broadcast TWT element, inclusion of the BSS color change notification element, modification of the multi-user EDCA parameter set element, modification of the spatial reuse parameter set element, and modification of the ultra-high-throughput operation element.
  10. A step of receiving first information by a first STA of a first STA MLD, wherein the first information indicates whether a key BSS parameter corresponding to at least one AP of a first AP MLD has changed. A communication method comprising the steps of determining, based on the first information, whether the key BSS parameter corresponding to the at least one AP of the first AP MLD changes, by the first STA.
  11. The method according to claim 10, wherein the first information is a count value.
  12. The method described above is The method according to claim 10 or 11, further comprising the step of recording the first information using the first STA.
  13. The step of determining whether the key BSS parameter corresponding to the at least one AP of the first AP MLD changes based on the first information by the first STA is, The first station includes the step of determining whether the key BSS parameter corresponding to the at least one AP of the first AP MLD changes, based on whether the value of the first information is the same as the value of the second information. The second information is information received before the first STA receives the first information, and the second information indicates whether the key BSS parameter corresponding to the at least one AP of the first AP MLD changes. The method according to any one of claims 10 to 12.
  14. The first station determines whether the key BSS parameter corresponding to at least one AP of the first AP MLD changes based on whether the value of the first information is the same as the value of the second information, If the value of the first information is the same as the value of the second information, the first STA determines that the key BSS parameter corresponding to the AP of the first AP MLD has not changed, and/or, The method according to claim 13, further comprising the step of determining, if the value of the first information differs from the value of the second information, that the first STA has changed the key BSS parameter corresponding to the at least one AP of the first AP MLD.
  15. If the value of the first information differs from the value of the second information, the method is The method according to claim 13 or 14, further comprising the step of receiving a beacon frame by a second STA of the first STA MLD, wherein the beacon frame includes key BSS parameters corresponding to an AP associated with the second STA, and the second STA is a station located in the first STA MLD and associated with the first AP MLD.
  16. If the value of the first information differs from the value of the second information, the method is The steps include: transmitting a first frame by the first STA, wherein the first frame is for requesting key BSS parameters corresponding to an AP associated with a second STA, and the second STA is a station located in the first STA MLD and associated with the first AP MLD; The method according to claim 13 or 14, further comprising the steps of: receiving a second frame by the first station, wherein the second frame includes the key BSS parameter corresponding to the AP associated with the second STA.
  17. The method according to claim 15 or 16, wherein the second STA is all the STAs of the first STA MLD.
  18. The method according to any one of claims 10 to 17, wherein the first information is transported in a check beacon field.
  19. The method according to claim 18, wherein the check beacon field is transported in a traffic instruction map (TIM) frame.
  20. The method according to any one of claims 10 to 19, wherein the key BSS parameter includes one or more of the following: inclusion of a channel switching notification element, inclusion of an extended channel switching notification element, modification of the EDCA parameter element, inclusion of a quiet element, modification of the DSSS parameter set, modification of the CF parameter set element, modification of the HT operation element, inclusion of a broadband channel switching element, inclusion of a channel switching wrapper element, inclusion of an operation mode notification element, inclusion of a quiet channel element, modification of the VHT operation element, modification of the HE operation element, insertion of a broadcast TWT element, inclusion of the BSS color change notification element, modification of the multi-user EDCA parameter set element, modification of the space reuse parameter set element, and modification of the ultra-high-throughput operation element.

Description

This application claims priority to Chinese Patent Application No. 202210376192.0, entitled "COMMUNICATION METHOD AND APPARATUS," filed on 11 April 2022, which is incorporated herein by reference in its entirety. The embodiments of this application relate to the field of communications, and more specifically, to communications methods and apparatus. To significantly increase the service transmission speed of wireless local area network (WLAN) systems, the IEEE 802.11ax standard, which builds upon existing orthogonal frequency division multiplexing (OFDM) technology, further utilizes orthogonal frequency division multiple access (OFDMA) technology. OFDMA technology supports multiple nodes when simultaneously transmitting and receiving data, thereby achieving improved multi-station diversity. The next-generation Wi-Fi standard, IEEE 802.11be, is also known as extremely high throughput (EHT) or Wi-Fi 7, and its most important technical objective is to significantly improve peak throughput. According to the IEEE 802.11be standard, WLAN devices support the coordination of multiple streams (the maximum number of spatial streams is 16), multiple frequency bands (e.g., 2.4GHz, 5GHz, and 6GHz frequency bands), and multiple channels within the same frequency band to improve peak throughput and reduce service transmission latency. Multiple frequency bands or multiple channels are sometimes collectively referred to as multilink. A next-generation IEEE 802.11 standard station device that supports multiple links simultaneously is called a multi-link device (MLD). The Traffic Indication Map (TIM) broadcast function indicates that a station (STA) or station multilink device can receive TIM frames within a specified time interval to obtain updates on the key basic service set (BSS) parameters of an access point (AP) associated with the station multilink device. However, in conventional techniques, the method by which the station multilink device obtains updates on the key BSS parameters affects the reliability of the communication. Embodiments of this application provide a communication method and apparatus for improving the reliability of communications. This is a diagram showing the structure of AP MLD and STA MLD according to one embodiment of this application.This is a diagram showing the structure of a communication system according to an embodiment of this application.This is another diagram showing the structure of a communication system according to an embodiment of this application.This is yet another diagram showing the structure of a communication system according to an embodiment of this application.This is a diagram showing the frame structure of a TIM frame according to one embodiment of this application.This is a diagram showing the frame structure of a TIM frame according to one embodiment of this application.This is a diagram showing the frame structure of a TIM frame according to one embodiment of this application.This is a diagram of a communication method according to one embodiment of the present application.This is a block diagram of a communication device according to one embodiment of this application.This is a block diagram of a communication device according to one embodiment of the present application. The technical solution of this application will be described below with reference to the attached drawings. To better understand the embodiments of this application, the relevant concepts in these embodiments will be explained first. 1. Multilink Devices The wireless communication systems to which embodiments of this application are applicable may be wireless local area networks (WLANs) or cellular networks. The communication method may be implemented by a communication device within the wireless communication system, or by a chip or processor within the communication device. The communication device may be a wireless communication device that supports simultaneous transmission over multiple links. For example, the communication device is called a multilink device or a multiband device. Compared to a device that supports only single-link transmission, a multilink device has higher transmission efficiency and higher throughput. A multilink device includes one or more affiliated stations (STAs). An affiliated STA is a logical station and may operate on a single link. An affiliated station may be an access point (AP) or a non-access point station (non-AP STA). For ease of explanation, in this application, a multilink device whose affiliated station is an AP may be referred to as a multilink AP, multilink AP device, or AP multilink device (AP MLD). A multilink device whose affiliated station is a non-AP STA may be referred to as a multilink STA, multilink STA device, or STA multilink device (STA MLD). For ease of explanation, in embodiments of this application, "a multilink device includes an affiliated STA" may also be briefly described as "a multilink device includes an STA." Note that a multilink dev