JP7698339B2 - 無線通信システムにおいてフレームを送受信するための方法及び無線通信端末 - Google Patents

無線通信システムにおいてフレームを送受信するための方法及び無線通信端末 Download PDF

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JP7698339B2
JP7698339B2 JP2023521645A JP2023521645A JP7698339B2 JP 7698339 B2 JP7698339 B2 JP 7698339B2 JP 2023521645 A JP2023521645 A JP 2023521645A JP 2023521645 A JP2023521645 A JP 2023521645A JP 7698339 B2 JP7698339 B2 JP 7698339B2
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twt
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JP2023545087A (ja
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ゴンジュン・コ
ジュヒョン・ソン
サンヒョン・キム
ハンスル・ホン
ジンサム・カク
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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
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H04W72/512—Allocation or scheduling criteria for wireless resources based on terminal or device properties for low-latency requirements, e.g. URLLC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/04—Scheduled access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
JP2023521645A 2020-10-08 2021-10-08 無線通信システムにおいてフレームを送受信するための方法及び無線通信端末 Active JP7698339B2 (ja)

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KR10-2020-0130622 2020-10-08
KR20200130622 2020-10-08
KR10-2020-0131504 2020-10-12
KR20200131504 2020-10-12
KR20200149759 2020-11-10
KR10-2020-0149759 2020-11-10
KR10-2020-0169023 2020-12-04
KR20200169023 2020-12-04
PCT/KR2021/013948 WO2022075821A1 (ko) 2020-10-08 2021-10-08 무선 통신 시스템에서 프레임을 송수신하기 위한 방법 및 무선 통신 단말

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Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121645432A (zh) 2020-10-08 2026-03-10 韦勒斯标准与技术协会公司 在无线通信系统中用于传输和接收帧的方法和无线通信终端
WO2022110035A1 (zh) * 2020-11-27 2022-06-02 北京小米移动软件有限公司 通信方法和通信设备
WO2022111734A1 (en) 2020-11-30 2022-06-02 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Access point, station, and wireless communication method
EP4256881A4 (en) * 2020-12-04 2024-06-19 Panasonic Intellectual Property Corporation of America COMMUNICATION APPARATUS AND COMMUNICATION METHOD FOR PRIORITIZED TRAFFIC
US12035236B2 (en) * 2020-12-07 2024-07-09 Meta Platforms Technologies, Llc Systems and methods for quiet element in TWT for wireless communication
TW202224470A (zh) 2020-12-07 2022-06-16 美商菲絲博克科技有限公司 用於在針對無線通信的目標喚醒時間（twt）中的靜默元素之系統和方法
US20210112615A1 (en) * 2020-12-18 2021-04-15 Po-Kai Huang Multi-link device data continuity
US12160821B2 (en) * 2020-12-18 2024-12-03 Samsung Electronics Co., Ltd. Apparatus and method for traffic delay information request and traffic offset alignment
CN114698068B (zh) * 2020-12-28 2024-06-07 华为技术有限公司 业务传输方法、装置及系统
JP2022133131A (ja) * 2021-03-01 2022-09-13 キヤノン株式会社 通信装置、通信装置の制御方法、およびプログラム
WO2022197041A1 (ko) * 2021-03-16 2022-09-22 엘지전자 주식회사 무선랜 시스템에서 관리 프레임을 통해 특정 ap에 대한 중요 업데이트 정보를 송수신하는 방법 및 장치
US20240237064A1 (en) * 2021-05-14 2024-07-11 Sony Group Corporation Wireless communication device, wireless communication terminal, and wireless communication method
US12225584B2 (en) 2021-05-25 2025-02-11 Sony Group Corporation Restricted target wait time (R-TWT) operations and parameters
WO2022251117A1 (en) * 2021-05-25 2022-12-01 Sony Group Corporation Restricted target wait time (r-twt) operations and parameters
US20230021113A1 (en) * 2021-07-09 2023-01-19 Samsung Electronics Co., Ltd. Restricted twt operation for peer-to-peer communication
US11882471B2 (en) * 2021-07-12 2024-01-23 Qualcomm Incorporated Sensing coordination in a wireless network
WO2023036438A1 (en) * 2021-09-10 2023-03-16 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatuses for communicating on a first channel and a second channel
CN117134873A (zh) * 2022-05-20 2023-11-28 华为技术有限公司 信道接入方法和相关装置
WO2023237786A1 (en) * 2022-06-10 2023-12-14 Canon Kabushiki Kaisha Edca backoff restart procedures and state switches in emlsr or emlmr co-affiliated stations
US20250267491A1 (en) * 2022-07-01 2025-08-21 Hyundai Motor Company Method and device for low latency communication in dense environment
WO2024007261A1 (en) * 2022-07-07 2024-01-11 Nokia Shanghai Bell Co., Ltd. Request and report of mld level statistic and delay information
US20240015649A1 (en) * 2022-07-08 2024-01-11 Apple Inc. Multi-link target wake time (twt)
US12520360B2 (en) 2022-08-01 2026-01-06 Samsung Electronics Co., Ltd. Method and apparatus for TDLS discovery for NSTR constrained devices
US12598647B2 (en) 2022-09-02 2026-04-07 Mediatek Inc. Efficient pre-channel reservation mechanism for TWT and restricted TWT in OBSS dense networks
US12587952B2 (en) * 2022-09-13 2026-03-24 Avago Technologies International Sales Pte. Limited System for and method of access protocol
WO2024077558A1 (zh) * 2022-10-13 2024-04-18 北京小米移动软件有限公司 通信方法、电子设备及存储介质
EP4625901A4 (en) * 2022-11-21 2025-12-17 Beijing Xiaomi Mobile Software Co Ltd COMMUNICATION METHOD, ELECTRONIC DEVICE AND STORAGE MEDIA
US12446090B2 (en) * 2022-12-22 2025-10-14 Hewlett Packard Enterprise Development Lp Multi-link operation
US12587963B2 (en) * 2023-01-20 2026-03-24 Nxp Usa, Inc. Device, method, and system for channel switching
CN120642414A (zh) * 2023-02-08 2025-09-12 Oppo广东移动通信有限公司 信道接入方法、装置、设备及存储介质
CN118784159A (zh) * 2023-03-30 2024-10-15 华为技术有限公司 通信系统、空口预约方法和接入设备
US20240340789A1 (en) * 2023-04-07 2024-10-10 Samsung Electronics Co., Ltd. R-twt based multi-ap coordination
US20240365159A1 (en) * 2023-04-25 2024-10-31 Newracom, Inc. Transmitting a multi-rate aggregated physical layer service data unit (a-psdu) to allow low latency transmission
EP4668658A1 (en) * 2023-05-16 2025-12-24 LG Electronics Inc. Method and apparatus for performing c-ofdma operation in multi-ap communication in wireless lan system
KR20260032933A (ko) * 2023-06-30 2026-03-10 엘지전자 주식회사 무선랜 시스템에서 다중-bss 환경에서의 r-twt 관련 공지를 수행하는 방법 및 장치
WO2025035364A1 (zh) * 2023-08-14 2025-02-20 北京小米移动软件有限公司 通信方法、接入点设备、站点设备及通信设备
CN121729973A (zh) * 2023-08-29 2026-03-24 Lg电子株式会社 无线lan系统中用于发送和接收业务的方法和设备
WO2025048407A1 (ko) * 2023-08-29 2025-03-06 엘지전자 주식회사 무선랜 시스템에서 트래픽을 송수신하는 방법 및 장치
WO2025048621A1 (ko) * 2023-09-01 2025-03-06 엘지전자 주식회사 무선랜 시스템에서 트래픽을 송수신하는 방법 및 장치
JP2025074879A (ja) * 2023-10-30 2025-05-14 キヤノン株式会社 通信装置、制御方法、及び、プログラム
US20250193800A1 (en) * 2023-12-11 2025-06-12 Mediatek Inc. Long-distance wi-fi communication method and apparatus thereof
WO2025188048A1 (ko) * 2024-03-04 2025-09-12 엘지전자 주식회사 무선랜 시스템에서 다중 링크 장치의 twt 동작을 수행하는 방법 및 장치
US20260006644A1 (en) * 2024-06-27 2026-01-01 Interdigital Patent Holdings, Inc. Station, access point and method for low latency traffic in wireless networks

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020013874A1 (en) 2018-07-08 2020-01-16 Intel Corporation Apparatus, system and method of scheduling time sensitive networking (tsn) wireless communications

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3046385B1 (en) 2013-09-11 2019-01-09 Electronics and Telecommunications Research Institute Channel access control method and apparatus in wireless lan system
US10187905B2 (en) * 2015-06-24 2019-01-22 Marvell World Trade Ltd. Target wake time (TWT) scheduling for orthogonal frequency-division multiple access (OFDMA) channelization
WO2017026807A1 (ko) * 2015-08-11 2017-02-16 주식회사 윌러스표준기술연구소 타겟 웨이크 타임 기반의 전력 절약을 위한 무선 통신 방법 및 무선 통신 단말
US20170195954A1 (en) * 2016-01-05 2017-07-06 Chittabrata Ghosh Restrictive service period for power save devices
US10194468B2 (en) * 2016-03-04 2019-01-29 Apple Inc. Wireless channel reservation
US10149209B2 (en) * 2016-05-13 2018-12-04 Blackberry Limited Communicating in a second channel while ceasing transmission in a first channel
WO2019022506A1 (ko) * 2017-07-27 2019-01-31 엘지전자 주식회사 무선 랜에서 프레임을 송신 또는 수신하는 방법 및 이를 위한 장치
US20190253967A1 (en) 2018-02-14 2019-08-15 Qualcomm Incorporated Managing target wake time scheduling using congestion metrics
US11503539B2 (en) * 2018-08-23 2022-11-15 Lg Electronics Inc. Method and device for transmitting or receiving information about links in wireless LAN system
KR102509679B1 (ko) * 2018-09-06 2023-03-15 삼성전자 주식회사 IEEE 802.11 표준에 정의된 TWT(target wake time)를 이용하여 무선 매체에 대한 접근을 지원하는 전자 장치
US11672010B2 (en) * 2019-10-29 2023-06-06 Intel Corporation Beacon interval with boundary time points (BTPS) to improve latency for time sensitive traffic (TST) in extremely high throughout (EHT) WLANS
US11737133B2 (en) * 2020-03-02 2023-08-22 Nxp Usa, Inc. QoS guarantee for high priority low latency service
US12250592B2 (en) * 2020-07-01 2025-03-11 Intel Corporation Methods and arrangements for application service discovery
CN118612878A (zh) 2020-08-14 2024-09-06 华为技术有限公司 一种信道接入方法及通信装置
US12069723B2 (en) * 2020-09-09 2024-08-20 Qualcomm Incorporated Scheduling wireless stations within a target wake time service period
US11800445B2 (en) * 2020-10-01 2023-10-24 Nxp Usa, Inc. Frame transmission between wireless devices
CN121645432A (zh) 2020-10-08 2026-03-10 韦勒斯标准与技术协会公司 在无线通信系统中用于传输和接收帧的方法和无线通信终端

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020013874A1 (en) 2018-07-08 2020-01-16 Intel Corporation Apparatus, system and method of scheduling time sensitive networking (tsn) wireless communications

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Chunyu Hu, et. al.，Protected TWT Enhancement for Latency Sensitive Traffic，IEEE 802.11-20/1046r1，2020年08月28日，pp.1-20

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CN116158180A (zh) 2023-05-23
US20230262768A1 (en) 2023-08-17
EP4228370B1 (en) 2026-02-25
JP2023545087A (ja) 2023-10-26
EP4645966A2 (en) 2025-11-05
KR20230070239A (ko) 2023-05-22
JP2025120303A (ja) 2025-08-15
CN121711778A (zh) 2026-03-20
EP4228370A1 (en) 2023-08-16
US12574968B2 (en) 2026-03-10
EP4228370A4 (en) 2024-03-20
CN121645432A (zh) 2026-03-10
WO2022075821A1 (ko) 2022-04-14
CN116158180B (zh) 2026-01-02
EP4645966A3 (en) 2025-11-26
CN121793114A (zh) 2026-04-03

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