CN102201891A - Wireless frame transmission method and device - Google Patents
Wireless frame transmission method and device Download PDFInfo
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- CN102201891A CN102201891A CN2011101174238A CN201110117423A CN102201891A CN 102201891 A CN102201891 A CN 102201891A CN 2011101174238 A CN2011101174238 A CN 2011101174238A CN 201110117423 A CN201110117423 A CN 201110117423A CN 102201891 A CN102201891 A CN 102201891A
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- vht
- receiving terminal
- territory
- ltf
- long training
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
Abstract
The invention discloses a wireless frame transmission method and a wireless frame transmission device. The wireless frame transmission method comprises the following steps of: transmitting a null data packet (NDP) to a receiver, wherein the NDP comprises at least two very high throughput (VHT) long training fields (VHT-LTF), and the maximum number of the VHT-LTFs is determined according to the number of the VHT-LTFs which can be supported by at least one receiver. By the transmission method and the transmission device, the maximum number of the VHT-LTFs in the NDP is determined.
Description
Technical field
The present invention relates to wireless communication technology field, especially a kind of sending method of radio frames and device.
Background technology
WLAN (Wireless Local Area Networks is called for short WLAN) is that the employing wireless communication technology is interconnected with computer equipment, and formation can the mutual communication and the network system that realizes resource-sharing.The essence of WLAN (wireless local area network) is the connected mode that replaces wire cable by the mode of wireless connections, realizes the radio interconnected of computer and network, thereby makes moving of the structure of network and terminal more flexible.
Institute of Electrical and Electric Engineers (Institute for Electrical and Electronic Engineers, be called for short IEEE) the 802.11st, one of mainstream technology of present WLAN (wireless local area network), this agreement have mainly been stipulated physical layer (PHY) and MAC layer (MAC) standard.Along with the development of mobile communication technology and people raising to the demand of wireless network, physical layer specification constantly develops towards the more and more higher direction of speed, has experienced 801.11 to 802.11b, arrives 802.11a/g again, 802.11n then arrives the development course of 802.11ac at last.The actual physical technology also develops into OFDM (Orthogonal Frequency Division Multiplexing from direct sequence spread spectrum skill, be called for short OFDM) technology, and in IEEE802.11n, introduced multi-antenna technology, in IEEE802.11ac, introduce big bandwidth and multi-user's multiple-input and multiple-output (Multi-User Multiple Input Multiple Output abbreviates MU-MIMO as).
Current I EEE802.11ac system regulation, when needs receiving terminal during to the transmitting terminal feedback channel information, transmitting terminal sends NDPA (Null Data Packet Announcement to receiving terminal, feed back claim frame) and NDP (Null Data Packet, the channel measurement frame), require STA (the being equivalent to receiving terminal) feedback channel information of STA (website) the information field corresponding address among the NDPA.
Wherein, channel measurement frame NDP form comprises as shown in Figure 1: L-STF (long training sequence), S-STF (short training sequence), L-SIG (signal domain), VHT-SIG-A (VHT signal A territory), VHT-STF (VHT short training sequence), VHT-LTF (the long training of VHT territory) and VHT-SIG-B (VHT signal B territory).
The peaked definite method and apparatus that lacks a kind of number for the VHT-LTF among the channel measurement frame NDP in the prior art.
Summary of the invention
The main technical problem to be solved in the present invention is, a kind of sending method and device of radio frames is provided, and can determine the maximum number of the long training of VHT territory VHT-LTF among the channel measurement frame NDP.
For solving the problems of the technologies described above, the invention provides a kind of sending method of radio frames, comprise step: measure frame NDP to the receiving terminal transmitting channel; Described channel measurement frame NDP comprises the long training of at least two VHT territory VHT-LTF, and the maximum number of the long training of described VHT territory VHT-LTF is determined according to the number of the long training of the VHT territory VHT-LTF that at least one receiving terminal can be supported.
Further, when being a receiving terminal, described maximum number is the smaller value in the middle of the maximum supported dimension of channel measurement of the number of transmit antennas of feedback matrix of areas of capacity indication of this receiving terminal or receiving terminal or two.
Further, when being a plurality of receiving terminal, the VHT that described maximum number can be supported for each receiving terminal grows the minimum value in the number of training territory VHT-LTF.
Further, for each receiving terminal, the number of the long training of its VHT that can support territory VHT-LTF is the smaller value in the middle of the maximum supported dimension of channel measurement of the number of transmit antennas of feedback matrix of areas of capacity indication of described receiving terminal or receiving terminal or two.
Further, the Nsts that indicates among the number that the long training of the VHT that comprises among channel measurement frame NDP territory VHT-LTF is set and the VHT signal A territory VHT-SIG-A is identical.
Further, described channel measurement frame NDP is made up of long training sequence L-STF, short training sequence S-STF, signal domain L-SIG, VHT signal A territory VHT-SIG-A, VHT short training sequence VHT-STF, two the long training of VHT territory VHT-LTF at least.
A kind of dispensing device of radio frames, described dispensing device is used for measuring frame NDP to the receiving terminal transmitting channel; Described channel measurement frame NDP comprises the long training of at least two VHT territory VHT-LTF, and the long training of the VHT territory VHT-LTF number that the maximum number of the long training of described VHT territory VHT-LTF can be supported according at least one receiving terminal is determined.
Further, when being a receiving terminal, described maximum number is the smaller value in the middle of the maximum supported dimension of channel measurement of the number of transmit antennas of feedback matrix of areas of capacity indication of this receiving terminal or receiving terminal or two.
Further, when being a plurality of receiving terminal, the VHT that described maximum number can be supported for each receiving terminal grows the minimum value in the number of training territory VHT-LTF; For each receiving terminal, the long training of its VHT that can support territory VHT-LTF number is the smaller value in the middle of the maximum supported dimension of channel measurement of the number of transmit antennas of feedback matrix of areas of capacity indication of described receiving terminal or receiving terminal or two.
Further, described channel measurement frame NDP is made up of long training sequence L-STF, short training sequence S-STF, signal domain L-SIG, VHT signal A territory VHT-SIG-A, VHT short training sequence VHT-STF, two the long training of VHT territory VHT-LTF at least.
The invention has the beneficial effects as follows: in the sending method of the radio frames that the present invention passes through and the device, train the number of territory VHT-LTF to determine the maximum number of the VHT-LTF in the channel measurement frame of transmission by the VHT length that receiving terminal can be supported, thereby make the number of the VHT-LTF in the channel measurement frame more reasonable, more can reflect the characteristic of receiving terminal.
In the sending method of radio frames of the present invention and the device, channel measurement frame NDP is made up of long training sequence (L-STF), short training sequence (S-STF), signal domain (L-SIG), VHT signal A territory (VHT-SIG-A), VHT short training sequence (VHT-STF), two VHT long training territories (VHT-LTF) at least.Than prior art, the channel measurement frame in the method and apparatus of the present invention has lacked VHT signal B territory (VHT-SIG-B), thereby when the receiving terminal transmitting channel is measured frame NDP, has reduced the pilot-frequency expense of transmitting channel measurement frame NDP.
Description of drawings
Fig. 1 is the structure of the channel measurement frame NDP in existing;
Fig. 2 is the structure of the channel measurement frame NDP in one embodiment of the present invention.
Embodiment
In conjunction with the accompanying drawings the present invention is described in further detail below by embodiment.
As shown in Figure 1, the channel measurement frame NDP in the agreement is made up of L-STF (long training sequence), S-STF (short training sequence), L-SIG (signal domain), VHT-SIG-A (VHT signal A territory), VHT-STF (VHT short training sequence), VHT-LTF (the long training of VHT territory) and VHT-SIG-B (VHT signal B territory).
For saving pilot-frequency expense, as shown in Figure 2, the invention provides a kind of sending method and device of radio frames, be used for measuring frame NDP to the receiving terminal transmitting channel.In this sending method and device, adopted a kind of new channel measurement frame NDP frame structure.This channel measurement frame NDP is made up of long training sequence (L-STF), short training sequence (S-STF), signal domain (L-SIG), VHT signal A territory (VHT-SIG-A), VHT short training sequence (VHT-STF), two VHT long training territories (VHT-LTF) at least.
Can see, frame structure of the present invention compared with prior art, a main difference is: omitted VHT-SIG-B (VHT signal B territory).Existing VHT-SIG-B (VHT signal B territory) comprises following four partial contents, is respectively: Length (data length), MCS (the modulating-coding exponent numbers of data), Reserved (reservation bit) and Tail (tail bit).Send the parameter vector table for data length Length by the NDP in the agreement and limit, send in the parameter vector table at NDP data length is defined as 0.
And for MCS (the modulating-coding exponent numbers of data), Reserved (reservation bit) and Tail (tail bit), the present invention is designed to it to indicate in VHT signal A territory.Following table is the content of VHT-SIG-A indication:
This shows that the content of VHT-SIG-B (VHT signal B territory) is indicated in sending parameter vector table TXVECTOR and VHT signal A territory.Thereby in the present invention, can guarantee to realize the original function in VHT-SIG-B (VHT signal B territory), can reduce sending the required pilot-frequency expense of NDP again, thereby when utilizing NDP of the present invention to carry out channel measurement, can improve the transmission rate of data.
No matter be the structure of the channel measurement frame NDP in having now, or the structure of the channel measurement frame NDP that proposes among the present invention, the long training of VHT territory (VHT-LTF) all had.Sending method of the present invention and device are also set the maximum number in the long training of VHT territory before transmitting channel is measured frame NDP:
Determine the long maximum of training territory (VHT-LTF) number of VHT that channel measurement frame NDP comprises according to the long training of VHT territory (VHT-LTF) number that at least one receiving terminal can be supported.
Wherein, when having only a receiving terminal, maximum is the smaller value in the middle of the maximum supported dimension of channel measurement of the number of transmit antennas of feedback matrix of areas of capacity indication of this receiving terminal or receiving terminal or two.
Such as, receiving terminal has only site STA 1, the number of transmit antennas of the feedback matrix of the areas of capacity indication of site STA 1 is 4, and the maximum supported dimension of the channel measurement of this website is 8, and then the maximum of the number of VHT-LTF is provided with the little value between 4 or 8 or two.
When two or more receiving terminal, the minimum value in the number of the VHT-LTF that threshold value can be supported for each receiving terminal.For each receiving terminal, the long training of its VHT that can support territory VHT-LTF number is the smaller value in the middle of the maximum supported dimension of channel measurement of the number of transmit antennas of feedback matrix of areas of capacity indication of described receiving terminal or receiving terminal or two.
Such as, receiving terminal is two websites, is respectively STA1 and STA2, and STA1 can support that the number of the VHT-LTF of simultaneously-measured NDP is 4, and STA2 can support that the VHT-LTF number of the NDP of measurement is 8, and then the threshold value of the VHT-LTF of NDP is 4.
When receiving terminal has when a plurality of, because the central minimum value of number of the VHT-LTF that the maximum of the VHT-LTF number among the channel measurement frame NDP that sends can be supported for each receiving terminal.Promptly do not exist the VHT-LTF number of transmission to surpass the situation of the number of the VHT-LTF that certain receiving terminal can support.If maximum number is not set, the situation that may occur is that the number of the VHT-LTF of transmission is 8, and the number of the VHT-LTF that certain receiving terminal can be supported has only 4, and this has caused the waste that sends on the one hand, has increased the expense of pilot tone.On the other hand, need extra algorithm that 4 unnecessary VHT-LTF are handled, thereby increased the complexity of sending method and device.
After above-mentioned threshold value set, be no more than under the situation of described threshold value, it is identical that the Nsts that indicates in the long training of VHT territory (VHT-LTF) number that comprises among the channel measurement frame NDP and the VHT signal A territory (VHT-SI G-A) is set.
Above content be in conjunction with concrete execution mode to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the sending method of a radio frames is characterized in that, comprises step: measure frame NDP to the receiving terminal transmitting channel; Described channel measurement frame NDP comprises the long training of at least two VHT territory VHT-LTF, and the maximum number of the long training of described VHT territory VHT-LTF is determined according to the number of the long training of the VHT territory VHT-LTF that at least one receiving terminal can be supported.
2. the method for claim 1, it is characterized in that, when being a receiving terminal, described maximum number is the smaller value in the middle of the maximum supported dimension of channel measurement of the number of transmit antennas of feedback matrix of areas of capacity indication of this receiving terminal or receiving terminal or two.
3. the method for claim 1 is characterized in that, when being a plurality of receiving terminal, the VHT that described maximum number can be supported for each receiving terminal grows the minimum value in the number of training territory VHT-LTF.
4. method as claimed in claim 3, it is characterized in that, for each receiving terminal, the number of the long training of its VHT that can support territory VHT-LTF is the smaller value in the middle of the maximum supported dimension of channel measurement of the number of transmit antennas of feedback matrix of areas of capacity indication of described receiving terminal or receiving terminal or two.
5. as the arbitrary described method of claim 1-4, it is characterized in that the Nsts that indicates among the number that the long training of the VHT that comprises among channel measurement frame NDP territory VHT-LTF is set and the VHT signal A territory VHT-SIG-A is identical.
6. as each described method in the claim 1 to 4, it is characterized in that described channel measurement frame NDP is made up of long training sequence L-STF, short training sequence S-STF, signal domain L-SIG, VHT signal A territory VHT-SIG-A, VHT short training sequence VHT-STF, two the long training of VHT territory VHT-LTF at least.
7. the dispensing device of a radio frames is characterized in that, described dispensing device is used for measuring frame NDP to the receiving terminal transmitting channel; Described channel measurement frame NDP comprises the long training of at least two VHT territory VHT-LTF, and the long training of the VHT territory VHT-LTF number that the maximum number of the long training of described VHT territory VHT-LTF can be supported according at least one receiving terminal is determined.
8. device as claimed in claim 7, it is characterized in that, when being a receiving terminal, described maximum number is the smaller value in the middle of the maximum supported dimension of channel measurement of the number of transmit antennas of feedback matrix of areas of capacity indication of this receiving terminal or receiving terminal or two.
9. device as claimed in claim 7 is characterized in that, when being a plurality of receiving terminal, the VHT that described maximum number can be supported for each receiving terminal grows the minimum value in the number of training territory VHT-LTF; For each receiving terminal, the long training of its VHT that can support territory VHT-LTF number is the smaller value in the middle of the maximum supported dimension of channel measurement of the number of transmit antennas of feedback matrix of areas of capacity indication of described receiving terminal or receiving terminal or two.
10. as each described device in the claim 7 to 9, it is characterized in that described channel measurement frame NDP is made up of long training sequence L-STF, short training sequence S-STF, signal domain L-SIG, VHT signal A territory VHT-SIG-A, VHT short training sequence VHT-STF, two the long training of VHT territory VHT-LTF at least.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110117423.8A CN102201891B (en) | 2011-05-03 | 2011-05-03 | Wireless frame transmission method and device |
| JP2014508677A JP5684947B2 (en) | 2011-05-03 | 2012-03-30 | Method and apparatus for transmitting wireless data packet |
| BR112013028267-3A BR112013028267B1 (en) | 2011-05-03 | 2012-03-30 | Method for transmitting a radio data packet and device for transmitting a radio data packet |
| KR1020137029478A KR101507676B1 (en) | 2011-05-03 | 2012-03-30 | Radio frame transmitting method and device |
| PCT/CN2012/073351 WO2012149847A1 (en) | 2011-05-03 | 2012-03-30 | Radio frame transmitting method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110117423.8A CN102201891B (en) | 2011-05-03 | 2011-05-03 | Wireless frame transmission method and device |
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| CN102201891A true CN102201891A (en) | 2011-09-28 |
| CN102201891B CN102201891B (en) | 2015-07-22 |
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| CN201110117423.8A Active CN102201891B (en) | 2011-05-03 | 2011-05-03 | Wireless frame transmission method and device |
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| JP (1) | JP5684947B2 (en) |
| KR (1) | KR101507676B1 (en) |
| CN (1) | CN102201891B (en) |
| BR (1) | BR112013028267B1 (en) |
| WO (1) | WO2012149847A1 (en) |
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| WO2012149847A1 (en) * | 2011-05-03 | 2012-11-08 | 中兴通讯股份有限公司 | Radio frame transmitting method and device |
| CN103001728A (en) * | 2011-09-14 | 2013-03-27 | 华为技术有限公司 | Method and device for representing data length |
| CN103096341A (en) * | 2011-11-01 | 2013-05-08 | 华为技术有限公司 | Methods, stations and system of transmitting and receiving of measured data |
| WO2013063935A1 (en) * | 2011-10-31 | 2013-05-10 | 华为技术有限公司 | Channel measurement feedback requesting method, station device, and service set system |
| WO2013135092A1 (en) * | 2012-03-16 | 2013-09-19 | 中兴通讯股份有限公司 | Null feedback frame transmission method and reception station |
| CN105659656A (en) * | 2013-11-19 | 2016-06-08 | 英特尔Ip公司 | High-efficiency WLAN (HEW) master station and methods to increase information bits for HEW communication |
| CN107645737A (en) * | 2016-07-21 | 2018-01-30 | 中兴通讯股份有限公司 | A kind of method of channel measurement, radio communication device and equipment |
| CN108496311A (en) * | 2016-02-01 | 2018-09-04 | 高通股份有限公司 | Beam forming technique for single stream communication |
| CN109245809A (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 |
| US10368368B2 (en) | 2013-11-19 | 2019-07-30 | Intel IP Corporation | Method, apparatus, and computer readable medium for multi-user scheduling in wireless local-area networks |
| WO2021114053A1 (en) * | 2019-12-09 | 2021-06-17 | 北京小米移动软件有限公司 | Transmission measurement method, transmission measurement device and storage medium |
| US11968066B2 (en) | 2013-06-25 | 2024-04-23 | Huawei Technologies Co., Ltd. | Method for uplink multiuser data transmission and system for uplink multiuser multiple input multiple output |
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| WO2016021838A1 (en) * | 2014-08-07 | 2016-02-11 | 엘지전자(주) | Method for transmitting frame in wireless communication system and device therefor |
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| WO2012149847A1 (en) * | 2011-05-03 | 2012-11-08 | 中兴通讯股份有限公司 | Radio frame transmitting method and device |
| CN103001728A (en) * | 2011-09-14 | 2013-03-27 | 华为技术有限公司 | Method and device for representing data length |
| WO2013063935A1 (en) * | 2011-10-31 | 2013-05-10 | 华为技术有限公司 | Channel measurement feedback requesting method, station device, and service set system |
| CN103096341A (en) * | 2011-11-01 | 2013-05-08 | 华为技术有限公司 | Methods, stations and system of transmitting and receiving of measured data |
| 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 |
| WO2013135092A1 (en) * | 2012-03-16 | 2013-09-19 | 中兴通讯股份有限公司 | Null feedback frame transmission method and reception station |
| US11038737B2 (en) | 2013-06-25 | 2021-06-15 | Huawei Technologies Co., Ltd. | Method for uplink multiuser data transmission and system for uplink multiuser multiple input multiple output |
| US11968066B2 (en) | 2013-06-25 | 2024-04-23 | Huawei Technologies Co., Ltd. | Method for uplink multiuser data transmission and system for uplink multiuser multiple input multiple output |
| US11212156B2 (en) | 2013-06-25 | 2021-12-28 | Huawei Technologies Co., Ltd. | Method for uplink multiuser data transmission and system for uplink multiuser multiple input multiple output |
| CN109245809B (en) * | 2013-06-25 | 2021-08-20 | 华为技术有限公司 | Uplink multi-user data transmission method and uplink multi-user input and output system |
| CN109245809A (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 |
| US11063807B2 (en) | 2013-06-25 | 2021-07-13 | Huawei Technologies Co., Ltd. | Method for uplink multiuser data transmission and system for uplink multiuser multiple input multiple output |
| US10348469B2 (en) | 2013-11-19 | 2019-07-09 | Intel IP Corporation | Hew master station and method for communicating in accordance with a scheduled OFDMA technique on secondary channels |
| US10368368B2 (en) | 2013-11-19 | 2019-07-30 | Intel IP Corporation | Method, apparatus, and computer readable medium for multi-user scheduling in wireless local-area networks |
| CN105659656A (en) * | 2013-11-19 | 2016-06-08 | 英特尔Ip公司 | High-efficiency WLAN (HEW) master station and methods to increase information bits for HEW communication |
| CN108496311A (en) * | 2016-02-01 | 2018-09-04 | 高通股份有限公司 | Beam forming technique for single stream communication |
| CN107645737A (en) * | 2016-07-21 | 2018-01-30 | 中兴通讯股份有限公司 | A kind of method of channel measurement, radio communication device and equipment |
| CN107645737B (en) * | 2016-07-21 | 2022-06-10 | 中兴通讯股份有限公司 | Channel measurement method, wireless communication device and equipment |
| WO2021114053A1 (en) * | 2019-12-09 | 2021-06-17 | 北京小米移动软件有限公司 | Transmission measurement method, transmission measurement device and storage medium |
| CN113261324A (en) * | 2019-12-09 | 2021-08-13 | 北京小米移动软件有限公司 | Transmission measurement method, transmission measurement device, and storage medium |
| CN113261324B (en) * | 2019-12-09 | 2023-07-25 | 北京小米移动软件有限公司 | Transmission measurement method, transmission measurement device, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101507676B1 (en) | 2015-03-31 |
| WO2012149847A1 (en) | 2012-11-08 |
| BR112013028267B1 (en) | 2022-05-03 |
| KR20130143128A (en) | 2013-12-30 |
| BR112013028267A2 (en) | 2017-04-25 |
| CN102201891B (en) | 2015-07-22 |
| JP5684947B2 (en) | 2015-03-18 |
| JP2014513486A (en) | 2014-05-29 |
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