Search

JP-2026076274-A - A multilink device that operates using multiple links and a method for operating a multilink device.

JP2026076274AJP 2026076274 AJP2026076274 AJP 2026076274AJP-2026076274-A

Abstract

[Problem] To provide a wireless communication method using multilink and a wireless communication terminal using the same. [Solution] In a wireless communication system, a multilink device including multiple stations 100 each operating on multiple links includes a transceiver and a processor, the processor being one of the multiple stations, transmitting a TWT (target wake time) element from the first station coupled with the first AP on the first link, and requesting a TWT agreement for the second station operating on the second link and the second AP coupled with the second station. [Selection Diagram] Figure 3

Inventors

  • サンヒュン・キム
  • ゴンジュン・コ
  • ジュヒョン・ソン
  • ジンサム・カク

Assignees

  • ウィルス インスティテュート オブ スタンダーズ アンド テクノロジー インコーポレイティド

Dates

Publication Date
20260511
Application Date
20260126
Priority Date
20210317

Claims (20)

  1. A multilink device including multiple stations, each operating on multiple links, Includes a transceiver unit and a processor, The aforementioned processor, A multilink device that is one of several stations, transmits a TWT (target wake time) element from a first station coupled to a first AP on a first link, and requests a TWT agreement for a second station operating on a second link and a second AP coupled to the second station.
  2. The multilink device according to claim 1, wherein the TWT element includes a bitmap indicating information indicating the link to which the TWT agreement that the TWT element intends to establish applies.
  3. The TWT request station for the TWT agreement for the second station and the second AP is the second station, The multilink apparatus according to claim 1, wherein the TWT response station for the TWT agreement for the second station and the second AP is the second AP.
  4. The aforementioned processor, The multilink device according to claim 3, which terminates the TWT agreement for the second station and the second AP when it receives a TWT termination frame from the second AP or when it successfully transmits the TWT termination frame to the second AP.
  5. The aforementioned processor, The multilink device according to claim 1, wherein the TWT agreement for the second station and the second AP is terminated without receiving or transmitting a TWT termination frame that terminates the TWT agreement for the second station and the second AP when the second link is deactivated.
  6. The multilink device according to claim 1, wherein the TWT element requests multiple TWT agreements established on multiple links, including a second link.
  7. The multilink device according to claim 6, wherein each of the multiple TWT agreements established on the multiple links is identified based on the respective link ID of the multiple links.
  8. The multilink device according to claim 7, wherein each of the multiple TWT agreements established on the multiple links is identified based on the respective link ID of the multiple links, the MAC (medium access control) address of the multilink device, and the respective TWT Flow ID of the multiple TWT agreements established on the multiple links.
  9. The aforementioned processor, The multilink device according to claim 7, which, upon successfully transmitting or receiving a TWT cancellation frame, cancels at least one of a plurality of TWT agreements established on a plurality of links based on the link ID indicated by the TWT cancellation frame.
  10. The aforementioned processor, The TWT agreement for the second station and the second AP is terminated, The multilink device according to claim 1, wherein the TWT agreement for the second station and the second AP is transferred to the first station and the first AP.
  11. The aforementioned processor, The multilink device according to claim 10, wherein when the TWT agreement for the second station and the second AP is transferred to the first station and the first AP, the TWT parameters of the TWT agreement for the second station and the second AP are applied to the TWT agreement for the first station and the first AP.
  12. A method for operating a multilink device including multiple stations, each operating on multiple links, An operating method comprising the step of sending a TWT (target wake time) element from a first station, which is one of several stations and coupled to a first AP on a first link, and requesting a TWT agreement for a second station operating on a second link and a second AP coupled to the second station.
  13. The operation method according to claim 12, wherein the TWT element includes a bitmap indicating information that indicates the link to which the TWT agreement that the TWT element intends to establish applies.
  14. The TWT request station for the TWT agreement for the second station and the second AP is the second station, The operation method according to claim 12, wherein the TWT response station for the TWT agreement for the second station and the second AP is the second AP.
  15. The aforementioned operation method is, The operation method according to claim 14, further comprising the step of canceling the TWT agreement for the second station and the second AP when a TWT cancellation frame is received from the second AP or when the TWT cancellation frame is successfully transmitted to the second AP.
  16. The aforementioned operation method is, The operation method according to claim 12, further comprising the step of canceling the TWT agreement for the second station and the second AP without receiving or transmitting a TWT cancellation frame that cancels the TWT agreement for the second station and the second AP when the second link is deactivated.
  17. The operation method according to claim 12, wherein the TWT element requests multiple TWT agreements established on multiple links, including a second link.
  18. The operation method according to claim 17, wherein each of the multiple TWT agreements established on the multiple links is identified based on the link ID of each of the multiple links.
  19. The operation method according to claim 18, wherein each of the multiple TWT agreements established on the multiple links is identified based on the respective link ID of the multiple links, the MAC (medium access control) address of the multilink device, and the respective TWT Flow ID of the multiple TWT agreements established on the multiple links.
  20. The aforementioned operation method is, The operation method according to claim 18, further comprising the step of, upon successfully transmitting or receiving a TWT deactivation frame, deactivating at least one of a plurality of TWT agreements established on a plurality of links based on the link ID indicated by the TWT deactivation frame.

Description

This invention relates to a multilink device that operates using multiple links and a method for operating a multilink device. Recently, with the increasing prevalence of mobile devices, Wireless LAN (Wireless LAN) technology, which can provide fast wireless internet services to these devices, has been gaining attention. Wireless LAN technology is a technology that enables mobile devices such as smartphones, smartpads, laptop PCs, portable multimedia players, and embedded devices to connect to the internet wirelessly in homes, businesses, or specific service areas, based on short-range wireless communication technology. IEEE (Istituto de Electronics Engineers) 802.11 has been commercializing or developing a variety of technologies since supporting early wireless LAN technologies using the 2.4GHz frequency band. First, IEEE 802.11b uses the 2.4GHz band frequency band and supports communication speeds up to 11Mbps. IEEE 802.11a, commercialized after IEEE 802.11b, uses the 5GHz band frequency band instead of the 2.4GHz band, reducing interference compared to the considerably congested 2.4GHz band, and uses OFDM technology to increase communication speeds up to 54Mbps. However, IEEE 802.11a has the disadvantage of a shorter communication range compared to IEEE 802.11b. Furthermore, IEEE 802.11g, like IEEE 802.11b, uses the 2.4GHz band and achieves a maximum communication speed of 54Mbps, satisfying backward compatibility and attracting considerable attention. It also has an advantage over IEEE 802.11a in terms of communication range. Furthermore, IEEE 802.11n is a technical standard established to overcome the limitations in communication speed that had been pointed out as a vulnerability in wireless LANs. IEEE 802.11n aims to increase network speed and reliability and extend the operating range of wireless networks. Specifically, IEEE 802.11n supports high processing rates (High Throughput, HT) of up to 540 Mbps or more, and is based on MIMO (Multiple Inputs and Multiple Outputs) technology, which uses multiple antennas at both the transmitter and receiver ends to minimize transmission errors and optimize data speed. This standard also uses a coding method that transmits multiple duplicate copies to improve data reliability. As the proliferation of wireless LANs accelerates and the applications using them diversify, there is a growing need for new wireless LAN systems that can support processing speeds higher than those supported by IEEE 802.11n (Very High Throughput, VHT). Among these, IEEE 802.11ac supports a wide bandwidth (80 MHz to 160 MHz) at the 5 GHz frequency. While the IEEE 802.11ac standard is defined only in the 5 GHz band, early 11ac chipsets are expected to support operation in the 2.4 GHz band for backward compatibility with older 2.4 GHz band products. Theoretically, this standard allows for a minimum wireless LAN speed of 1 Gbps and a maximum single-link speed of 500 Mbps. This extends the concept of the radio interface accepted in 802.11n, including a wider radio frequency bandwidth (up to 160 MHz), more MIMO spatial streams (up to 8), multi-user MIMO, and high-density modulation (up to 256 QAM). Furthermore, IEEE 802.11ad is a method of transmitting data using the 60 GHz band instead of the conventional 24 GHz/5 GHz. IEEE 802.11ad is a transmission standard that provides speeds of up to 7 Gbps using beamforming technology, making it suitable for streaming large amounts of data and high-bitrate video such as uncompressed HD video. However, the 60 GHz frequency band has the disadvantage of being difficult to pass through obstacles, limiting its use to short-range devices. Meanwhile, as a wireless LAN standard following 802.11ac and 802.11ad, the IEEE 802.11ax (High Efficiency WLAN, HEW) standard has been developed and is nearing completion to provide highly efficient and high-performance wireless LAN communication technology in high-density environments where access points (APs) and terminals are densely clustered. In an 802.11ax-based wireless LAN environment, high frequency-efficient communication is required both indoors and outdoors in the presence of high-density stations and APs (Access Points), and various technologies have been developed to achieve this. Furthermore, to support new multimedia applications such as high-definition video and real-time games, development has begun on a new wireless LAN standard to increase the maximum transmission speed. The 7th generation wireless LAN standard, IEEE 802.11be (Extremely High Throughput, EHT), is being developed with the goal of supporting a maximum transmission rate of 30 Gbps in the 2.4/5/6 GHz band through wider bandwidth, increased spatial streams, and multiplexed AP coordination. This figure shows a wireless LAN system according to one embodiment of the present invention.This figure shows a wireless LAN system according to another embodiment of the present invention.This figure shows the configuration of a station according to one embo