WO2012149847A1 - 一种无线帧的发送方法和装置 - Google Patents

一种无线帧的发送方法和装置 Download PDF

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Publication number
WO2012149847A1
WO2012149847A1 PCT/CN2012/073351 CN2012073351W WO2012149847A1 WO 2012149847 A1 WO2012149847 A1 WO 2012149847A1 CN 2012073351 W CN2012073351 W CN 2012073351W WO 2012149847 A1 WO2012149847 A1 WO 2012149847A1
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WO
WIPO (PCT)
Prior art keywords
vht
receiving end
long training
domain
ltf
Prior art date
Application number
PCT/CN2012/073351
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English (en)
French (fr)
Chinese (zh)
Inventor
姜静
张力
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to JP2014508677A priority Critical patent/JP5684947B2/ja
Priority to KR1020137029478A priority patent/KR101507676B1/ko
Priority to BR112013028267-3A priority patent/BR112013028267B1/pt
Publication of WO2012149847A1 publication Critical patent/WO2012149847A1/zh

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Classifications

    • 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
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for transmitting a wireless frame. Background technique
  • WLAN Wireless Local Area Networks
  • the essence of WLAN is to replace the connection mode of wired cable by means of wireless connection, realize the wireless interconnection of computer and network, so that the construction of the network and the movement of the terminal are more flexible.
  • IEEE Institute for Electrical and Electronic Engineers 802.11 is one of the mainstream technologies for wireless LANs. This protocol mainly specifies the physical layer (PHY) and media access control layer (MAC) specifications.
  • PHY physical layer
  • MAC media access control layer
  • 802.11ac the development history of 802.11ac.
  • the actual physical technology has also evolved from direct sequence spread spectrum technology to Orthogonal Frequency Division Multiplexing (OFDM) technology, and introduced multi-antenna technology in IEEE802.11n, introducing large bandwidth in IEEE802.il ac. And multi-user Multiple Input Multiple Output (MU-MIMO).
  • OFDM Orthogonal Frequency Division Multiplexing
  • MU-MIMO multi-user Multiple Input Multiple Output
  • the current IEEE 802.il ac system stipulates that when the receiving end needs to feed back channel information to the transmitting end, the transmitting end sends a feedback request frame (NDPA, Null Data Packet Announcement) and a channel measurement frame (NDP, Null Data Packet) to the receiving end.
  • NDPA feedback request frame
  • NDP channel measurement frame
  • STA (equivalent to the receiving end) corresponding to the address (STA) information field in the NDPA feeds back channel information.
  • the NDP format of the channel measurement frame is as shown in FIG. 1, and includes: a long training sequence (L-STF), Short training sequence (S-STF), signal domain (L-SIG), VHT signal A domain (VHT-SIG-A), VHT short training sequence (VHT-STF), VHT long training domain (VHT-LTF) and VHT Signal B domain (VHT-SIG-B).
  • L-STF long training sequence
  • S-STF Short training sequence
  • L-SIG signal domain
  • VHT-SIG-A VHT signal A domain
  • VHT-STF VHT short training sequence
  • VHT-LTF VHT long training domain
  • VHT-SIG-B VHT Signal B domain
  • the main technical problem to be solved by the present invention is to provide a method and apparatus for transmitting a radio frame, which can determine the maximum number of VHT-LTFs in the VHT long training domain in the channel measurement frame NDP.
  • the present invention provides a method for transmitting a radio frame, the method comprising: transmitting a channel measurement frame NDP to a receiving end; the channel measurement frame NDP includes at least two VHT long training domains VHT-LTF, The maximum number of VHT-LTFs in the VHT long training domain is determined according to the number of VHT long training domains VHT-LTF that at least one receiver can support.
  • the maximum number of VHT-LTFs in the VHT-long training domain is determined according to the number of VHT-long training domains VHT-LTF that can be supported by at least one receiving end, and is: when there is only one receiving end, the maximum number The number of transmitting antennas of the feedback matrix indicated by the capability domain of the receiving end or the channel of the receiving end measures the maximum supportable dimension or the smaller of the two.
  • the maximum number of VHT-LTFs in the VHT-long training domain is determined according to the number of VHT-long training domains VHT-LTF that can be supported by at least one receiving end, and is: when there are multiple receiving ends, the maximum number The number is the minimum of the number of VHT long training domains VHT-LTF that each receiving end can support.
  • the method further includes: for each receiving end, the number of VHT long training domains VHT-LTF that can be supported is the number of transmitting antennas of the feedback matrix indicated by the capability domain of the receiving end or the channel measurement of the receiving end is maximum The supported dimensions or the smaller of the two.
  • the method further includes: setting the number of VHT long training domains VHT-LTF included in the channel measurement frame NDP to be the same as the Nsts indicated in the VHT signal A domain VHT-SIG-A.
  • the channel measurement frame NDP is composed of a long training sequence L-STF, a short training sequence S-STF, a signal domain L-SIG, a VHT signal A domain VHT-SIG-A, a VHT short training sequence VHT-STF, at least two A VHT long training domain consists of VHT-LTF.
  • a transmitting device for a radio frame configured to send a channel measurement frame NDP to a receiving end;
  • the channel measurement frame NDP includes at least two VHT long training domains VHT-LTF, the VHT long training domain VHT-
  • the maximum number of LTFs is determined according to the number of VHT long training domains VHT-LTF that at least one receiver can support.
  • the maximum number is the number of transmitting antennas of the feedback matrix indicated by the capability domain of the receiving end or the maximum supported dimension of the channel measurement of the receiving end or the smaller of the two.
  • the maximum number is the minimum of the number of VHT long training domains VHT-LTF that each receiving end can support; for each receiving end, the VHT that it can support
  • the number of long training domain VHT-LTF is the number of transmitting antennas of the feedback matrix indicated by the capability domain of the receiving end or the maximum supported dimension of the channel measurement of the receiving end or the smaller of the two.
  • the channel measurement frame NDP is composed of a long training sequence L-STF, a short training sequence S-STF, a signal domain L-SIG, a VHT signal A domain VHT-SIG-A, a VHT short training sequence VHT-STF, at least two A VHT long training domain consists of VHT-LTF.
  • the beneficial effects of the present invention are: In the method and apparatus for transmitting a radio frame according to the present invention, the maximum number of VHT-LTFs in the transmitted channel measurement frame is determined by the number of VHT long training domains VHT-LTF that the receiving end can support. Therefore, the number of VHT-LTFs in the channel measurement frame is more reasonable, and the characteristics of the receiving end are more reflected.
  • the channel measurement frame NDP is composed of a long training sequence (L-STF), a short training sequence (S-STF), a signal domain (L-SIG), and a VHT signal A domain (VHT- SIG-A), VHT short training sequence (VHT-STF), at least two VHT long training domains (VHT-LTF) composition.
  • L-STF long training sequence
  • S-STF short training sequence
  • L-SIG signal domain
  • VHT- SIG-A VHT signal A domain
  • VHT-STF VHT short training sequence
  • VHT-LTF VHT long training domains
  • the channel measurement frame in the method and apparatus of the present invention lacks the VHT signal B field (VHT-SIG-B), thereby reducing the transmission channel measurement frame when transmitting the channel measurement frame NDP to the receiving end.
  • VHT-SIG-B VHT signal B field
  • FIG. 2 is a diagram showing the structure of a channel measurement frame NDP in an embodiment of the present invention. detailed description
  • the channel measurement frame NDP in the protocol consists of L-STF, S-STF (short training sequence), L-SIG (signal domain), VHT-SIG-A (VHT signal A domain), VHT-STF. (VHT short training sequence;), VHT-LTF (VHT long training domain) and VHT-SIG-B (VHT signal B domain).
  • the present invention provides a method and apparatus for transmitting a radio frame, which is used to send a channel measurement frame NDP to a receiving end.
  • a new channel measurement frame NDP frame structure is employed.
  • the channel measurement frame NDP consists of a long training sequence (L-STF), a short training sequence (S-STF), a signal domain (L-SIG), a VHT signal A domain (VHT-SIG-A), and a VHT short training sequence (VHT).
  • -STF consisting of at least two VHT long training domains (VHT-LTF).
  • VHT-SIG-B VHT signal B field
  • the existing VHT-SIG-B VHT signal B domain
  • the data length Length is defined by the NDP transmission parameter vector table in the protocol, and the data length is limited to 0 in the NDP transmission parameter vector table.
  • MCS data modulation coding order
  • the present invention is designed to be indicated in the VHT signal A field.
  • the table below shows the VHT-SIG-A indication
  • VHT-SIG-B VHT signal B field
  • TXVECTOR and VHT signal A fields the original function of the VHT-SIG-B (VHT signal B domain) can be guaranteed, and the pilot overhead required for transmitting the NDP can be reduced, thereby performing channel measurement using the NDP of the present invention. Can increase the data transfer rate.
  • VHT-LTF VHT long training domain
  • VHT-LTF The maximum number of VHT long training domains included in the channel measurement frame NDP is determined according to the number of VHT long training domains (VHT-LTF) that at least one receiver can support.
  • the maximum value is the number of transmitting antennas of the feedback matrix indicated by the capability domain of the receiving end or the maximum supported dimension of the channel measurement of the receiving end or the smaller of the two. For example, if the receiving end has only the station STA1, the number of transmitting antennas of the feedback matrix indicated by the capability field of the station STA1 is 4, and the maximum supported dimension of the channel measurement of the station is 8, and the maximum number of VHT-LTFs is set. A small value between 4 or 8 or two.
  • the threshold is the minimum of the number of VHT-LTFs that each receiver can support.
  • the number of VHT-long training domains VHT-LTF that can be supported is the number of transmitting antennas of the feedback matrix indicated by the capability domain of the receiving end or the maximum supported dimension of the channel measurement of the receiving end or two of Smaller value.
  • the receiving end is two stations, which are STA1 and STA2 respectively.
  • the number of VHT-LTFs that N1 can support simultaneously measuring is 4, and the number of VHT-LTFs that STA2 can support for measuring NDP is 8, then NDP
  • the threshold of the VHT-LTF is 4.
  • the maximum value of the number of VHT-LTFs in the NDP due to the transmitted channel measurement frame is the minimum value among the number of VHT-LTFs that can be supported by each receiving end. That is, there is no case where the number of VHT-LTFs transmitted exceeds the number of VHT-LTFs that can be supported by a certain receiving end. If the maximum number is not set, it may happen that the number of VHT-LTFs sent is eight, and the number of VHT-LTFs that can be supported by one receiver is only four, which causes waste of transmission. , increased the overhead of the pilot. On the other hand, an additional algorithm is needed to process the extra four VHT-LTFs, thereby increasing the complexity of the transmission method and apparatus.
  • VHT-LTF VHT long training domain
  • VHT-SIG VHT signal A domain
PCT/CN2012/073351 2011-05-03 2012-03-30 一种无线帧的发送方法和装置 WO2012149847A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2014508677A JP5684947B2 (ja) 2011-05-03 2012-03-30 無線データパケットの送信方法及び送信装置
KR1020137029478A KR101507676B1 (ko) 2011-05-03 2012-03-30 무선 프레임 송신 방법 및 장치
BR112013028267-3A BR112013028267B1 (pt) 2011-05-03 2012-03-30 Método para transmitir um pacote de dados de rádio e dispositivo para transmitir um pacote de dados de rádio

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110117423.8 2011-05-03
CN201110117423.8A CN102201891B (zh) 2011-05-03 2011-05-03 一种无线帧的发送方法和装置

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WO2012149847A1 true WO2012149847A1 (zh) 2012-11-08

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KR (1) KR101507676B1 (ko)
CN (1) CN102201891B (ko)
BR (1) BR112013028267B1 (ko)
WO (1) WO2012149847A1 (ko)

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CN103001728B (zh) * 2011-09-14 2016-08-03 华为技术有限公司 一种表示数据长度的方法和装置
CN103095426B (zh) * 2011-10-31 2015-06-03 华为技术有限公司 一种信道测量反馈请求方法、站点装置及服务集系统
CN103096341B (zh) * 2011-11-01 2016-05-25 华为技术有限公司 测量数据的发送、接收方法和站点以及系统
CN103312466A (zh) * 2012-03-16 2013-09-18 中兴通讯股份有限公司 空反馈帧的传输方法及接收站点
CN109245809B (zh) * 2013-06-25 2021-08-20 华为技术有限公司 上行多用户数据传输方法及上行多用户输入输出系统
WO2015077223A1 (en) 2013-11-19 2015-05-28 Intel IP Corporation Method, apparatus, and computer readable medium for multi-user scheduling in wireless local-area networks
US9325463B2 (en) 2013-11-19 2016-04-26 Intel IP Corporation High-efficiency WLAN (HEW) master station and methods to increase information bits for HEW communication
US10278172B2 (en) 2014-08-07 2019-04-30 Lg Electronics Inc. Method for transmitting frame in wireless communication system and device therefor
WO2016028125A2 (ko) 2014-08-21 2016-02-25 엘지전자(주) 무선 통신 시스템에서 상향링크 전송 방법 및 이를 위한 장치
US9876552B2 (en) * 2016-02-01 2018-01-23 Qualcomm Incorporated Beamforming techniques for single-stream communications
CN107645737B (zh) * 2016-07-21 2022-06-10 中兴通讯股份有限公司 一种信道测量的方法、无线通信装置及设备
WO2021114053A1 (zh) * 2019-12-09 2021-06-17 北京小米移动软件有限公司 传输测量方法、传输测量装置及存储介质

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Publication number Publication date
CN102201891A (zh) 2011-09-28
JP5684947B2 (ja) 2015-03-18
BR112013028267B1 (pt) 2022-05-03
KR20130143128A (ko) 2013-12-30
KR101507676B1 (ko) 2015-03-31
CN102201891B (zh) 2015-07-22
BR112013028267A2 (pt) 2017-04-25
JP2014513486A (ja) 2014-05-29

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