KR101507676B1 - Radio frame transmitting method and device - Google Patents

Radio frame transmitting method and device Download PDF

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KR101507676B1
KR101507676B1 KR1020137029478A KR20137029478A KR101507676B1 KR 101507676 B1 KR101507676 B1 KR 101507676B1 KR 1020137029478 A KR1020137029478 A KR 1020137029478A KR 20137029478 A KR20137029478 A KR 20137029478A KR 101507676 B1 KR101507676 B1 KR 101507676B1
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South Korea
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vht
ltf
long training
receiver
field
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KR1020137029478A
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Korean (ko)
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KR20130143128A (en
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징 지앙
리 장
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지티이 코포레이션
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Priority to PCT/CN2012/073351 priority patent/WO2012149847A1/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure

Abstract

The present invention relates to a wireless frame transmission method and a method of transmitting a channel measurement frame NDP to a receiving side, wherein the channel measurement frame NPD includes at least two VHT long training fields (VHT-LTF) LTF is determined according to the number of VHT long training fields (VHT-LTF) that can be supported by at least one receiver. At the same time, the present invention also discloses a radio frame transmission apparatus. The number of VHT-LTFs in the channel measurement frame is more reasonable and the characteristics of the receiver side are better reflected through the scheme according to the present invention.

Description

TECHNICAL FIELD [0001] The present invention relates to a radio frame transmission method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication technology field, and more particularly, to a wireless frame transmission method and apparatus.

Wireless Local Area Networks (WLANs) use wireless communication technology to connect computer devices together to form a network system capable of mutual communication and resource sharing. The essence of wireless local area network is wireless connection, replacing the connection method of wired cable, thereby realizing wireless interconnection between computer and network, thereby making network construction and mobile mobility more flexible.

IEEE 802.11 is currently one of the mainstream technologies of wireless local area networks and its protocols have mainly defined specifications for physical layer (PHY) and media access control (MAC) layers. As mobile technology evolves and people's demand for wireless networks grows, the physical layer technology specification continues to evolve in a direction of increasing speed, from 801.11 to 802.11b, to 802.11a / g, to the next 802.11n, To 802.11ac. The development of practical physics technology has also come from direct sequence spread spectrum technology to Orthogonal Frequency Division Multiplexing (OFDM) technology, introduces multi-antenna technology to IEEE802.11n, and IEEE802.11ac has a large bandwidth and multi- (MU-MIMO: Multi-User Multiple Input Multiple Output).

According to the IEEE 802.11ac system standard, when it is necessary to feed back the channel information to the transmitting side at the receiving side, the transmitting side transmits a Null Data Packet Announcement (NDPA) and a Null Data Packet (NDP) And requests the STA (corresponding to the receiver) corresponding to the address of the station (STA) information field in the NDPA to feedback the channel information.

The channel measurement frame NDP format includes a long training sequence (L-STF), a short training sequence (S-STF), a signal field (L-SIG), a VHT signal A field (VHT- A), a VHT short training sequence (VHT-STF), a VHT long training field (VHT-LTF) and a VHT signal B field (VHT-SIG-B).

In the prior art, a method and apparatus for determining the maximum value of the number of VHT-LTFs in the channel measurement frame NDP have not been proposed yet.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a radio frame transmission method and apparatus capable of determining a maximum number of VHT long training fields (VHT-LTF) in a channel measurement frame NDP.

According to another aspect of the present invention, there is provided a method for transmitting a radio frame, the method comprising transmitting a channel measurement frame NDP to a receiver, wherein the channel measurement frame NPD includes at least two VHT long training fields VHT -LTF) and the maximum number of VHT long training fields (VHT-LTF) is determined according to the number of VHT long training fields (VHT-LTF) that can be supported by at least one receiver.

In addition, the maximum number of VHT long training fields (VHT-LTF) is determined according to the number of VHT long training fields (VHT-LTF) that can be supported by at least one receiver, Is either the number of transmit antennas of the feedback matrix indicated by the capability field of the receiver or the maximum number of supportable dimensions of the channel measurement of the receiver or a smaller value.

In addition, when the maximum number of VHT long training fields (VHT-LTF) is determined according to the number of VHT long training fields (VHT-LTF) that can be supported by at least one receiver, The quantity is the smallest of the quantities of the VHT Long Training Field (VHT-LTF) that can be supported by each receiver.

In addition, in the method, the number of VHT long training fields (VHT-LTF) that can be supported by each receiver can be expressed by the number of transmit antennas of the feedback matrix indicated by the receiver's capability field, The maximum possible number of dimensions, or the smaller of the two.

The method further includes the step of setting the number of VHT long training fields (VHT-LTF) included in the channel measurement frame NDP to be equal to Nsts indicated by the VHT signal A field (VHT-SIG-A) do.

The channel measurement frame NDP includes a long training sequence L-STF, a short training sequence S-STF, a signal field L-SIG, a VHT signal A field VHT-SIG-A, (VHT-STF), and at least two VHT long training fields (VHT-LTF).

The present invention also provides a radio frame transmitter, wherein the transmitter is configured to transmit a channel measurement frame NDP to a receiver, wherein the channel measurement frame NPD includes at least two VHT long training fields (VHT-LTF) The maximum number of VHT long training fields (VHT-LTF) is determined according to the number of VHT long training fields (VHT-LTF) that can be supported by at least one receiver.

Also, in the case of a single receiver, the maximum number is the number of transmit antennas of the feedback matrix indicated by the receiver's capability field or the maximum number of supportable dimensions of the receiver channel measurement, or both.

Also, in the case of a plurality of receivers, the maximum quantity is a minimum value among the quantities of the VHT long training field (VHT-LTF) that can be supported by each receiver, and the VHT long training field VHT- LTF is the number of transmit antennas of the feedback matrix indicated by the capability field on the receiver side or the maximum number of supportable dimensions of the receiver channel measurement, or both.

The channel measurement frame NDP includes a long training sequence L-STF, a short training sequence S-STF, a signal field L-SIG, a VHT signal A field VHT-SIG-A, (VHT-STF), and at least two VHT long training fields (VHT-LTF).

Advantageous effects of the present invention are as follows. According to the method and apparatus for transmitting a radio frame according to the present invention, the maximum number of VHT-LTFs in a channel measurement frame to be transmitted is determined according to the number of VHT long training fields (VHT-LTF) So that the number of VHT-LTFs in the reception side can be more reasonable and better reflect the characteristics of the reception side.

The channel measurement frame NDP includes a long training sequence (L-STF), a short training sequence (S-STF), a signal field L-SIG, a VHT signal A field VHT- SIG-A), a VHT short training sequence (VHT-STF), and at least two VHT long training fields (VHT-LTF). Since the VHT signal B field (VHT-SIG-B) is not present in the channel measurement frame of the method and apparatus of the present invention, the pilot overhead for transmitting the channel measurement frame NDP when transmitting the channel measurement frame NDP to the receiver Reduce.

1 is a diagram illustrating a configuration of a conventional channel measurement frame NDP,
2 is a diagram illustrating a configuration of a channel measurement frame NDP according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in more detail with reference to the accompanying drawings.

1, the channel measurement frame NDP includes an L-STF, a short training sequence (S-STF), a signal field (L-SIG), a VHT signal A field (VHT-SIG- Sequence VHT-STF, a VHT long training field VHT-LTF and a VHT signal B field VHT-SIG-B.

In order to reduce pilot overhead, the present invention provides a radio frame transmission method and apparatus configured to transmit a channel measurement frame NDP to a receiving side, as shown in FIG. In the transmission method and apparatus according to the present invention, a new channel measurement frame NDP frame configuration is applied. The channel measurement frame NDP includes a long training sequence L-STF, a short training sequence S-STF, a signal field L-SIG, a VHT signal A field VHT-SIG-A, a VHT short training sequence VHT -STF), and at least two VHT long training fields (VHT-LTF).

As can be seen, there is one major difference in that the frame structure of the present invention omits VHT-SIG-B (VHT signal B field) compared to the prior art. In the conventional VHT-SIG-B (VHT signal B field), contents of four parts including a data length, a data modulation and coding scheme (MCS), a reserved bit and a tail bit are included. The data length is limited by the NDP transmission parameter vector table in the protocol and limits the data length to 0 in the NDP transmission parameter vector table.

For the Modulation and Coding Scheme (MCS), Reserved Bit and Tail Bit of the data, the present invention is designed to be indicated in the VHT signal A field. The following table shows what is indicated by VHT-SIG-A.

Figure 112013101178916-pct00001

As can be seen, the contents of VHT-SIG-B (VHT signal B field) have already been indicated in the transmission parameter vector table TXVECTOR and VHT signal A field. Accordingly, the present invention not only ensures the implementation of the existing functions of the VHT-SIG-B (VHT signal B field) but also reduces the pilot overhead required for the NDP transmission, thereby enabling the channel measurement using the NDP of the present invention The data transmission speed can be improved.

Has a VHT long training field (VHT-LTF), whether the configuration of the existing channel measurement frame NDP or the configuration of the channel measurement frame NDP proposed in the present invention. The transmission method and apparatus of the present invention proceed with the setting for the maximum number of VHT long training fields before transmitting the channel measurement frame NDP.

The maximum value of the number of VHT long training fields (VHT-LTF) included in the channel measurement frame NDP is determined according to the number of VHT long training fields (VHT-LTF) that can be supported by at least one receiver.

Here, for a single receiver, the maximum value is either the number of transmit antennas of the feedback matrix indicated by the capability field of the receiver or the maximum number of supportable dimensions of the receiver channel measurement, or both.

For example, if the number of transmit antennas in the feedback matrix indicated by the capability field of station STA1 is 4 and the maximum supportable number of dimensions of the channel measurement of the station is 8, then the maximum value of the quantity of VHT-LTF Lt; / RTI > is set to a small value of 4 or 8 or both.

For two or more receivers, the threshold is the minimum of the quantity of VHT-LTFs that each receiver can support. The number of VHT long training fields (VHT-LTF) that can be supported on each receiver side is either the number of transmit antennas of the feedback matrix indicated by the receiver capability field or the maximum supportable dimension dimension of the receiver channel measurement, It is a small value.

For example, if the receiver has two stations, STA1 and STA2, respectively, and STA1 can support simultaneous measurement of VHT-LTF of four NDPs and STA2 can support measurements of VHT-LTF of eight NDPs, The threshold of VHT-LTF of NDP is 4.

In the case of a plurality of receivers, the maximum value of the VHT-LTF quantity in the transmitted channel measurement frame NDP is the minimum of the quantities of VHT-LTF that each receiver can support. That is, the number of transmitted VHT-LTFs does not exceed the number of VHT-LTFs that can be supported by any one receiver. If the maximum number is not set, the number of transmitted VHT-LTFs may be 8, but the number of VHT-LTFs that can be supported by any one receiver may be only 4, which is a waste of transmission resources And increases the overhead of the pilot. On the other hand, a separate algorithm is required for processing the remaining four VHT-LTFs, which increases the transmission method and the complexity of the apparatus.

(VHT-SIG-A) and the number of VHT long training fields (VHT-LTF) included in the channel measurement frame NDP under the condition that the threshold value is not exceeded Set the indicated Nsts to be equal.

It should be understood that the above description is only a detailed description of the present invention in conjunction with a specific embodiment, and that the specific embodiments of the present invention are not limited to these descriptions. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

  1. And transmitting the channel measurement frame NDP to the receiving side,
    Wherein the channel measurement frame NDP includes at least two VHT long training fields VHT-LTF and the maximum quantity of the VHT long training fields VHT-LTF is a VHT long training field VHT -LTF).
    For a single receiver side, the maximum quantity is the number of transmit antennas of the feedback matrix indicated by the receiver capability field or the maximum number of supportable dimensions of the receiver channel measurement,
    For a plurality of receivers, the maximum quantity is the minimum of the quantities of the VHT Long Training Field (VHT-LTF) that can be supported by each receiver
    And transmitting the radio frame.
  2. delete
  3. delete
  4. The method according to claim 1,
    In the case of a plurality of receivers, the number of VHT long training fields (VHT-LTF) that can be supported by each receiver is the number of transmit antennas of the feedback matrix indicated by the receiver's capability field, The maximum number of dimensions that can be supported, or the smaller of them
    And transmitting the radio frame.
  5. The method according to claim 1 or 4,
    (VHT-LTF) contained in the channel measurement frame NDP is set equal to Nsts indicated by the VHT signal A field (VHT-SIG-A)
    And transmitting the radio frame.
  6. The method according to claim 1 or 4,
    The channel measurement frame NDP includes a long training sequence L-STF, a short training sequence S-STF, a signal field L-SIG, a VHT signal A field VHT-SIG-A, a VHT short training sequence VHT -STF), and at least two VHT long training fields (VHT-LTF)
    And transmitting the radio frame.
  7. And to transmit the channel measurement frame NDP to the receiving side,
    Wherein the channel measurement frame NDP includes at least two VHT long training fields VHT-LTF and the maximum quantity of the VHT long training fields VHT-LTF is a VHT long training field VHT -LTF).
    For a single receiver side, the maximum quantity is the number of transmit antennas of the feedback matrix indicated by the receiver capability field or the maximum number of supportable dimensions of the receiver channel measurement,
    For a plurality of receivers, the maximum quantity is the minimum of the quantities of the VHT Long Training Field (VHT-LTF) that can be supported by each receiver
    And transmits the radio frame to the wireless frame transmission apparatus.
  8. delete
  9. The method of claim 7,
    In the case of a plurality of receivers, the number of VHT long training fields (VHT-LTF) that can be supported by each receiver is the number of transmit antennas of the feedback matrix indicated by the receiver's capability field, The maximum number of dimensions that can be supported, or the smaller of them
    And transmits the radio frame to the wireless frame transmission apparatus.
  10. The method according to claim 7 or 9,
    The channel measurement frame NDP includes a long training sequence L-STF, a short training sequence S-STF, a signal field L-SIG, a VHT signal A field VHT-SIG-A, a VHT short training sequence VHT -STF), and at least two VHT long training fields (VHT-LTF)
    And transmits the radio frame to the wireless frame transmission apparatus.
KR1020137029478A 2011-05-03 2012-03-30 Radio frame transmitting method and device KR101507676B1 (en)

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CN201110117423.8 2011-05-03
CN201110117423.8A CN102201891B (en) 2011-05-03 2011-05-03 Wireless frame transmission method and device
PCT/CN2012/073351 WO2012149847A1 (en) 2011-05-03 2012-03-30 Radio frame transmitting method and device

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Publication number Priority date Publication date Assignee Title
CN102201891B (en) * 2011-05-03 2015-07-22 中兴通讯股份有限公司 Wireless frame transmission method and device
CN103001728B (en) * 2011-09-14 2016-08-03 华为技术有限公司 A kind of method and apparatus representing data length
CN103095426B (en) * 2011-10-31 2015-06-03 华为技术有限公司 Information channel measurement feedback requesting method, station device and service set system
CN103096341B (en) * 2011-11-01 2016-05-25 华为技术有限公司 The sending, receiving method of measurement data and website and system
CN103312466A (en) * 2012-03-16 2013-09-18 中兴通讯股份有限公司 Transmission method and receiving station for null feedback frame
CN109245806A (en) * 2013-06-25 2019-01-18 华为技术有限公司 Uplink multi-users data transmission method and uplink multi-users input-output system
CN108494538A (en) 2013-11-19 2018-09-04 英特尔Ip公司 The method, apparatus and computer-readable medium of multi-subscriber dispatching are used in WLAN
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
US20170303280A1 (en) * 2014-08-21 2017-10-19 Lg Electronics Inc. Method for uplink transmission in wireless communication system and apparatus therefor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010117816A1 (en) * 2009-03-31 2010-10-14 Marvell World Trade Ltd. Sounding and steering protocols for wireless communications

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4832087B2 (en) * 2005-01-26 2011-12-07 パナソニック株式会社 Radio base station apparatus and terminal apparatus
US20070189412A1 (en) * 2006-02-15 2007-08-16 Samsung Electronics Co., Ltd. Method and system for sounding packet exchange in wireless communication systems
JP4924106B2 (en) * 2006-04-27 2012-04-25 ソニー株式会社 Wireless communication system, wireless communication apparatus, and wireless communication method
KR101536773B1 (en) * 2008-07-31 2015-07-16 엘지전자 주식회사 Procedure for power save multi-poll(PSMP) in a very high throughput(VHT) wireless local access network system, PSMP frame format for the procedure, and station supporting the procedure
TW201105057A (en) * 2009-07-16 2011-02-01 Ralink Technology Corp Method and apparatus for generating training sequences in wireless communication system
CN102201891B (en) * 2011-05-03 2015-07-22 中兴通讯股份有限公司 Wireless frame transmission method and device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010117816A1 (en) * 2009-03-31 2010-10-14 Marvell World Trade Ltd. Sounding and steering protocols for wireless communications

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BR112013028267A2 (en) 2017-04-25
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