WO2018155835A1 - Procédé et dispositif de transmission de paquet de réveil dans un système lan sans fil - Google Patents

Procédé et dispositif de transmission de paquet de réveil dans un système lan sans fil Download PDF

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Publication number
WO2018155835A1
WO2018155835A1 PCT/KR2018/001481 KR2018001481W WO2018155835A1 WO 2018155835 A1 WO2018155835 A1 WO 2018155835A1 KR 2018001481 W KR2018001481 W KR 2018001481W WO 2018155835 A1 WO2018155835 A1 WO 2018155835A1
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WO
WIPO (PCT)
Prior art keywords
signal
information
mhz
field
subcarriers
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PCT/KR2018/001481
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English (en)
Korean (ko)
Inventor
박은성
임동국
최진수
Original Assignee
엘지전자 주식회사
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2018155835A1 publication Critical patent/WO2018155835A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • 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

Definitions

  • coefficients may be inserted in units of two subcarriers in the three subcarriers, and zero may be inserted in the remaining subcarriers.
  • the first sequence may be set to ⁇ ⁇ 1,0, -1 ⁇ , or ⁇ ⁇ 1,0, -1 ⁇ .
  • 20 is a diagram illustrating an example of SIG-B used for 80 MHz transmission.
  • the distributed system 110 may connect several BSSs 100 and 105 to implement an extended service set (ESS) 140 which is an extended service set.
  • ESS 140 may be used as a term indicating one network in which one or several APs 125 and 230 are connected through the distributed system 110.
  • APs included in one ESS 140 may have the same service set identification (SSID).
  • the term "user” may be used in various meanings, for example, may also be used to mean an STA participating in uplink MU MIMO and / or uplink OFDMA transmission in wireless LAN communication. It is not limited to this.
  • the example of FIG. 6 may also use 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, 996-RU, and the like. have.
  • seven DC tones can be inserted in the center frequency, 12 tones are used as the guard band in the leftmost band of the 80 MHz band, and 11 tones in the rightmost band of the 80 MHz band. This guard band can be used.
  • the L-LTF 710 may include a long training orthogonal frequency division multiplexing symbol.
  • the L-LTF 710 may be used for fine frequency / time synchronization and channel prediction.
  • the HE-SIG-B field includes a common field at the beginning, and the common field can be encoded separately from the following field. That is, as shown in FIG. 8, the HE-SIG-B field may include a common field including common control information and a user-specific field including user-specific control information.
  • the common field may include a corresponding CRC field and may be coded into one BCC block. Subsequent user-specific fields may be coded into one BCC block, including a "user-feature field" for two users and a corresponding CRC field, as shown.
  • the length of an OFDM symbol may be a value obtained by adding a length of a guard interval (GI) to an IDFT / DFT length.
  • the length of the GI can be various values such as 0.4 ⁇ s, 0.8 ⁇ s, 1.6 ⁇ s, 2.4 ⁇ s, 3.2 ⁇ s.
  • the present specification proposes an example of improving the control field included in the PPDU.
  • the control field improved by the present specification includes a first control field including control information required for interpreting the PPDU and a second control field including control information for demodulating the data field of the PPDU. do.
  • the first and second control fields may be various fields.
  • the first control field may be the HE-SIG-A 730 illustrated in FIG. 7
  • the second control field may be the HE-SIG-B 740 illustrated in FIGS. 7 and 8. Can be.
  • the bandwidth of the transmission frequency band is not limited and may be applied to a 40 MHz, 80 MHz, and 160 MHz transmission.
  • the communication system (or communication subsystem) described herein includes a main radio (802.11) and a low power wake up receiver.
  • the main radio is used for transmitting and receiving user data.
  • the main radio is turned off if there are no data or packets to transmit.
  • the low power wake-up receiver wakes up the main radio when there is a packet to receive. At this time, the user data is transmitted and received by the main radio.
  • the payload 2320 may include a MAC header 2324 including address information of the receiving apparatus that receives the wakeup packet 2300 or an identifier of the receiving apparatus.
  • the legacy preamble 2410 may be modulated according to the OFDM modulation scheme. That is, the OOK scheme is not applied to the legacy preamble 2410.
  • the payload may be modulated according to the OOK method.
  • the wakeup preamble 2422 in the payload may be modulated according to another modulation scheme.
  • the basic data rate for one information may be 125 Kbps (8us) or 62.5Kbps (16us).
  • Manchester coding is a type of line coding, and may indicate information as shown in the following table in a manner in which a transition of a magnitude value occurs in the middle of one bit period.
  • One of the first or second 1.6us periodic signals of the signal in the time domain may be selected and used as the sub information 0. You can simply use the zeros (1,32) signal as subinformation zero.
  • IFFT 3.2us of signal with 1.6us period is generated. Take one of these and set it as a 1.6us information signal (symbol).
  • One of the first or second 3.2us / m periodic signals of the signal in the time domain may be selected and used as the sub information 0.
  • a coefficient may be inserted into all of the available subcarriers, or a coefficient may be inserted in units of two or four columns, and then 64 IFFFs may be taken to generate a 3.2 us time domain signal. You can simply add a CP to configure the CP + 3.2us on signal.
  • the output of the interleaver 3230 may be input to a constellation mapper 3240.
  • the constellation mapper 3240 performs constellation mapping such as biphase shift keying (BPSK), quadrature phase shift keying (QPSK), quadrature amplitude modulation (n-QAM), and the like.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de transmission d'un paquet de réveil dans un système LAN sans fil. En particulier, un dispositif de transmission configure une trame de réveil sur laquelle un procédé OOK est appliqué. Le dispositif de transmission transmet la trame de réveil à un dispositif de réception. La trame de réveil contient un signal de marche et un signal d'arrêt. Le signal de marche est généré en appliquant une première séquence sur trois sous-trames consécutives dans la bande de 20 MHz et en exécutant une IFFT à 64 points sur celle-ci. La première séquence est générée en insérant un coefficient dans les trois sous-porteuses.
PCT/KR2018/001481 2017-02-26 2018-02-05 Procédé et dispositif de transmission de paquet de réveil dans un système lan sans fil WO2018155835A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762463720P 2017-02-26 2017-02-26
US62/463,720 2017-02-26

Publications (1)

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WO2018155835A1 true WO2018155835A1 (fr) 2018-08-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113162645A (zh) * 2020-01-06 2021-07-23 华为技术有限公司 Wlan基带芯片及fdma ppdu的生成方法
US20220361104A1 (en) * 2018-03-22 2022-11-10 Wilus Institute Of Standard And Technology Inc. Wireless communication method and wireless communication terminal using variable-length wake-up frame
US11770770B2 (en) 2017-10-27 2023-09-26 Wilus Institute Of Standards And Technology Inc. Wireless communication method and wireless communication terminal using wake-up radio

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140126442A1 (en) * 2012-11-02 2014-05-08 Qualcomm Incorporated Systems and methods for low power wake-up signal implementation and operations for wlan
US9025428B2 (en) * 2010-04-14 2015-05-05 Qualcomm Incorporated Allocating and receiving tones for a frame
US20160149743A1 (en) * 2014-11-20 2016-05-26 Futurewei Technologies, Inc. System and Method for Setting Cyclic Prefix Length
US20160173305A1 (en) * 2010-08-31 2016-06-16 Broadcom Corporation Phase rotation for preambles within multiple user, multiple access, and/or MIMO wireless communications
US9485733B1 (en) * 2015-05-17 2016-11-01 Intel Corporation Apparatus, system and method of communicating a wakeup packet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9025428B2 (en) * 2010-04-14 2015-05-05 Qualcomm Incorporated Allocating and receiving tones for a frame
US20160173305A1 (en) * 2010-08-31 2016-06-16 Broadcom Corporation Phase rotation for preambles within multiple user, multiple access, and/or MIMO wireless communications
US20140126442A1 (en) * 2012-11-02 2014-05-08 Qualcomm Incorporated Systems and methods for low power wake-up signal implementation and operations for wlan
US20160149743A1 (en) * 2014-11-20 2016-05-26 Futurewei Technologies, Inc. System and Method for Setting Cyclic Prefix Length
US9485733B1 (en) * 2015-05-17 2016-11-01 Intel Corporation Apparatus, system and method of communicating a wakeup packet

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11770770B2 (en) 2017-10-27 2023-09-26 Wilus Institute Of Standards And Technology Inc. Wireless communication method and wireless communication terminal using wake-up radio
US20220361104A1 (en) * 2018-03-22 2022-11-10 Wilus Institute Of Standard And Technology Inc. Wireless communication method and wireless communication terminal using variable-length wake-up frame
US11800451B2 (en) * 2018-03-22 2023-10-24 Wilus Institute Of Standards And Technology Inc. Wireless communication method and wireless communication terminal using variable-length wake-up frame
CN113162645A (zh) * 2020-01-06 2021-07-23 华为技术有限公司 Wlan基带芯片及fdma ppdu的生成方法
CN113162645B (zh) * 2020-01-06 2022-08-09 华为技术有限公司 Wlan基带芯片及fdma ppdu的生成方法
US11558233B2 (en) 2020-01-06 2023-01-17 Huawei Technologies Co., Ltd. WLAN baseband chip and FDMA PPDU generation method

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