CN107852769A - A kind of WLAN chain circuit self-adaptive method and the network equipment - Google Patents

A kind of WLAN chain circuit self-adaptive method and the network equipment Download PDF

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Publication number
CN107852769A
CN107852769A CN201580081538.2A CN201580081538A CN107852769A CN 107852769 A CN107852769 A CN 107852769A CN 201580081538 A CN201580081538 A CN 201580081538A CN 107852769 A CN107852769 A CN 107852769A
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ppdu
network equipment
detection
channel information
mode
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CN107852769B (en
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于健
杨讯
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • 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]

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

Abstract

A kind of WLAN chain circuit self-adaptive method and the network equipment, the flexibility ratio of channel information measurement can be improved, provides the user accurate link circuit self-adapting.The embodiment of the present invention includes：First network equipment obtains target channel information measurement result, and the target channel information measurement result is the measurement result obtained according to the detection physical layer protocol data unit PPDU of target pattern measurement channel informations；The first network equipment carries out link circuit self-adapting adjustment according to the target channel information measurement result.

Description

A kind of chain circuit self-adaptive method and the network equipment of WLAN Technical field
The present invention relates to field of communication technology more particularly to the chain circuit self-adaptive methods and the network equipment of a kind of WLAN.
Background technique
In a wireless communication system, due to the influence of the factors such as path loss, decline or noise, the channel information of wireless channel would generally be changed with time.For this time-varying characteristics of channel, people introduce link adaptation techniques.Wherein, link adaptation techniques refer to that system according to the channel information currently obtained, is adaptively adjusted the behavior of system configured transmission, influence to overcome or adapt to present channel variation bring.Can be seen that link adaptation techniques mainly from the basic principle of link adaptation techniques includes both sides content: being on the one hand the acquisition of channel information, i.e., how accurately and efficiently to obtain current channel conditions；It on the other hand is the adjustment of configured transmission, such as MCS (Modulation and Coding Scheme, modulation and coding strategy), transmission power and running time-frequency resource etc..Currently, link adaptation techniques win favor by its excellent performance in terms of improving the availability of frequency spectrum and message transmission rate, it has been successfully applied in various kinds of mobile communication system, has become one of the key technology for improving system performance.
In existing WiFi (Wireless-Fidelity, Wireless Fidelity) standard link circuit self-adapting during, the mode for measuring detection PPDU used in channel information is relatively single, however, with the introducing of the new features such as outdoor scene, uplink multi-users transmission in next-generation WiFi standard IEEE 802.11ax, the detection PPDU of single-mode is difficult to be adapted to the different demands of different application scene, higher requirements are also raised for selection of the IEEE 802.11ax to detection PPDU during link circuit self-adapting as a result,.
Summary of the invention
The embodiment of the invention provides the chain circuit self-adaptive method of WLAN a kind of and the network equipments, and the flexibility ratio of channel information measurement can be improved, and provide accurate link circuit self-adapting for user.
The first aspect of the embodiment of the present invention provides the chain circuit self-adaptive method of WLAN a kind of, comprising:
First network equipment obtains target channel information measurement result, and the target channel information measurement result is to measure the measurement knot that channel information obtains according to the detection physical layer protocol data unit PPDU of target pattern Fruit；
The first network equipment carries out link circuit self-adapting adjustment according to the target channel information measurement result.
In conjunction with the embodiment of the present invention in a first aspect, in the first implementation of the first aspect of the embodiment of the present invention, the first network equipment obtains target channel information measurement result and includes:
The first network equipment sends the first PPDU to second network equipment, wherein, first PPDU indicates that second network equipment needs to send detection PPDU, and the first PPDU further includes mode indication field, the mode indication field is used to indicate the detection PPDU that second network equipment generates target pattern；
The first network equipment receives the 2nd PPDU that second network equipment is sent, wherein the 2nd PPDU is the detection PPDU for the target pattern that second network equipment is generated according to the mode indication field；
The first network equipment measures channel information using the 2nd PPDU, obtains the target channel information measurement result.
In conjunction with the embodiment of the present invention in a first aspect, in second of implementation of the first aspect of the embodiment of the present invention, the first network equipment obtains target channel information measurement result and includes:
The first network equipment receives the PPDU that second network equipment is sent；Wherein, the PPDU indicates the second network equipment active transmission channel information measurement as a result, the PPDU further includes mode indication field, and the mode indication field is used to indicate the mode of detection PPDU used in second network equipment measurement channel information；
The first network equipment determines target channel information measurement result according to the mode indication field.
In conjunction with any one in the first aspect of the embodiment of the present invention, the first to second implementation of first aspect; in the third implementation of the first aspect of the embodiment of the present invention, the mode for detecting PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
In conjunction with the first implementation of the first aspect of the embodiment of the present invention, in the 4th kind of implementation of the first aspect of the embodiment of the present invention, the mode of the detection PPDU includes detection PPDU using indoor mode or outdoor mode；
When the mode indication field indicates that second network equipment generates the detection PPDU of outdoor mode, the 2nd PPDU is the spy for the enhancement that second network equipment is generated according to the mode indication field Survey PPDU；
Wherein, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
At least one symbol of the lead code of the detection PPDU is partly or completely replicated in time domain or frequency domain; the intersymbol protection interval of some or all of the detection PPDU is greater than the first preset value; the modulation coding scheme MCS of at least one symbol of the detection PPDU meets a certain preset condition and the Fourier of at least one symbol of the detection PPDU changes order higher than the second preset value.
In conjunction with any one in the first aspect of the embodiment of the present invention, first to fourth kind of implementation of first aspect, in the 5th kind of implementation of the first aspect of the embodiment of the present invention, the channel information includes the delay between the extended delays and/or multi-user of channel；
The first network equipment carries out link circuit self-adapting adjustment according to the target channel information measurement result
The first network equipment carries out the adaptive adjustment of protection interval according to the target channel information measurement result.
In conjunction with any one in the first aspect of the embodiment of the present invention, first to fourth kind of implementation of first aspect, in the 6th kind of implementation of the first aspect of the embodiment of the present invention, the channel information includes the Signal to Noise Ratio (SNR) of channel；
The first network equipment carries out link circuit self-adapting adjustment according to the target channel information measurement result
The first network equipment is modulated the adaptive adjustment of coding strategy MCS according to the target channel information measurement result.
The second aspect of the embodiment of the present invention provides the chain circuit self-adaptive method of WLAN a kind of, comprising:
Second network equipment receives the first PPDU that first network equipment is sent；Wherein, the first PPDU indicates that second network equipment needs to send detection PPDU, and the first PPDU further includes mode indication field, and the mode indication field is used to indicate the detection PPDU that second network equipment generates target pattern；
Second network equipment generates the detection PPDU of target pattern according to the mode indication field；
Second network equipment sends the 2nd PPDU to the first network equipment, wherein, 2nd PPDU measures channel information using the 2nd PPDU for the first network equipment, the target channel information measurement result is obtained, and link circuit self-adapting tune is carried out according to the target channel information measurement result It is whole.
In conjunction with the second aspect of the embodiment of the present invention; in the first implementation of the second aspect of the embodiment of the present invention, the mode for detecting PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
In conjunction with the second aspect of the embodiment of the present invention, in second of implementation of the second aspect of the embodiment of the present invention, the mode of the detection PPDU includes detection PPDU using indoor mode or outdoor mode；
When the mode indication field indicates that second network equipment generates the detection PPDU of outdoor mode, second network equipment includes: according to the detection PPDU that the mode indication field generates target pattern
Second network equipment generates the detection PPDU of enhancement according to the mode indication field；
Wherein, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
At least one symbol of the lead code of the detection PPDU is partly or completely replicated in time domain or frequency domain; the intersymbol protection interval of some or all of the detection PPDU is greater than the first preset value; the modulation coding scheme MCS of at least one symbol of the detection PPDU meets a certain preset condition and the Fourier of at least one symbol of the detection PPDU changes order higher than the second preset value.
In conjunction with any one in the second aspect of the embodiment of the present invention, the first to second implementation of second aspect, in the third implementation of the second aspect of the embodiment of the present invention, the channel information includes the delay between the extended delays and/or multi-user of channel；
2nd PPDU measures the delay between the extended delays and/or multi-user of channel for the first network equipment using the 2nd PPDU, and the delay between the extended delays and/or multi-user of the channel obtained according to measurement carries out the adaptive adjustment of protection interval.
In conjunction with any one in the second aspect of the embodiment of the present invention, the first to second implementation of second aspect, in the 4th kind of implementation of the second aspect of the embodiment of the present invention,
2nd PPDU measures the SNR of channel for the first network equipment using the 2nd PPDU, and the SNR of the channel obtained according to measurement carries out the adaptive adjustment of MCS.
The third aspect of the embodiment of the present invention provides the chain circuit self-adaptive method of WLAN a kind of, comprising:
Second network equipment generates PPDU；Wherein, the PPDU indicates the second network equipment active transmission channel information measurement as a result, the PPDU further includes mode indication field, and the mode indication field is used for Indicate the mode of detection PPDU used in second network equipment measurement channel information；
Second network equipment sends the PPDU to first network equipment, wherein, the PPDU determines target channel information measurement result according to the mode indication field for the first network equipment, and carries out link circuit self-adapting adjustment according to the target channel information measurement result.
In conjunction with the third aspect of the embodiment of the present invention; in the first implementation of the third aspect of the embodiment of the present invention, the mode for detecting PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
In conjunction with the third aspect of the embodiment of the present invention or the first implementation of the third aspect, in second of implementation of the third aspect of the embodiment of the present invention, the channel information includes the delay between the extended delays and/or multi-user of channel；
The PPDU determines target channel information measurement result according to the mode indication field for the first network equipment, and the adaptive adjustment of protection interval is carried out according to the target channel information measurement result.
In conjunction with the third aspect of the embodiment of the present invention or the first implementation of the third aspect, in the third implementation of the third aspect of the embodiment of the present invention, the channel information includes the Signal to Noise Ratio (SNR) of channel；
The PPDU determines target channel information measurement result according to the mode indication field for the first network equipment, and the adaptive adjustment of MCS is carried out according to the target channel information measurement result.
The fourth aspect of the embodiment of the present invention provides a kind of network equipment, comprising:
Acquiring unit, for obtaining target channel information measurement result, the target channel information measurement result is to measure the measurement result that channel information obtains according to the detection physical layer protocol data unit PPDU of target pattern；
Adjustment unit, for carrying out link circuit self-adapting adjustment according to the target channel information measurement result.
In conjunction with the fourth aspect of the embodiment of the present invention, in the first implementation of the fourth aspect of the embodiment of the present invention, the acquiring unit includes:
Sending module, for sending the first PPDU to destination network device, wherein, the first PPDU instruction destination network device needs to send detection PPDU, and the first PPDU further includes mode indication field, the mode indication field is used to indicate the detection PPDU that destination network device generates target pattern；
First receiving module, the 2nd PPDU sent for receiving the destination network device, wherein institute State the detection PPDU that the 2nd PPDU is the target pattern that the destination network device is generated according to the mode indication field；
First obtains module, for measuring channel information using the 2nd PPDU, obtains the target channel information measurement result.
In conjunction with the fourth aspect of the embodiment of the present invention, in second of implementation of the fourth aspect of the embodiment of the present invention, the acquiring unit includes:
Second receiving module, for receiving the PPDU of destination network device transmission；Wherein, for the PPDU instruction destination network device active transmission channel information measurement as a result, the PPDU further includes mode indication field, the mode indication field is used to indicate the mode of detection PPDU used in destination network device measurement channel information；
Second obtains module, for determining target channel information measurement result according to the mode indication field.
In conjunction with any one in the fourth aspect of the embodiment of the present invention, the first to second implementation of fourth aspect; in the third implementation of the fourth aspect of the embodiment of the present invention, the mode for detecting PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
In conjunction with the first implementation of the fourth aspect of the embodiment of the present invention, in the 4th kind of implementation of the fourth aspect of the embodiment of the present invention, the mode of the detection PPDU includes detection PPDU using indoor mode or outdoor mode；
When mode indication field instruction destination network device generates the detection PPDU of outdoor mode, the 2nd PPDU is the detection PPDU for the enhancement that the destination network device is generated according to the mode indication field；
Wherein, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
At least one symbol of the lead code of the detection PPDU is partly or completely replicated in time domain or frequency domain; the intersymbol protection interval of some or all of the detection PPDU is greater than the first preset value; the modulation coding scheme MCS of at least one symbol of the detection PPDU meets a certain preset condition and the Fourier of at least one symbol of the detection PPDU changes order higher than the second preset value.
In conjunction with appointing in the fourth aspect of the embodiment of the present invention, first to fourth kind of implementation of fourth aspect It anticipates one kind, in the 5th kind of implementation of the fourth aspect of the embodiment of the present invention, the channel information includes the delay between the extended delays and/or multi-user of channel；
The adjustment unit, specifically for carrying out the adaptive adjustment of protection interval according to the target channel information measurement result.
In conjunction with any one in the fourth aspect of the embodiment of the present invention, first to fourth kind of implementation of fourth aspect, in the 6th kind of implementation of the fourth aspect of the embodiment of the present invention, the channel information includes the SNR of channel；
The adjustment unit, specifically for being modulated the adaptive adjustment of coding strategy MCS according to the target channel information measurement result.
5th aspect of the embodiment of the present invention provides a kind of network equipment, comprising:
Receiving unit, for receiving the first PPDU of destination network device transmission；Wherein, the first PPDU indicates that the network equipment needs to send detection PPDU, and the first PPDU further includes mode indication field, and the mode indication field is used to indicate the detection PPDU that the network equipment generates target pattern；
Generation unit, for generating the detection PPDU of target pattern according to the mode indication field；
Transmission unit, for sending the 2nd PPDU to the destination network device, wherein, 2nd PPDU measures channel information using the 2nd PPDU for the destination network device, the target channel information measurement result is obtained, and link circuit self-adapting adjustment is carried out according to the target channel information measurement result.
In conjunction with the 5th aspect of the embodiment of the present invention; in the first implementation of the 5th aspect of the embodiment of the present invention, the mode for detecting PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
In conjunction with the 5th aspect of the embodiment of the present invention, in second of implementation of the 5th aspect of the embodiment of the present invention, the mode of the detection PPDU includes detection PPDU using indoor mode or outdoor mode；
When the mode indication field indicates that the network equipment generates the detection PPDU of outdoor mode, the generation unit, specifically for generating the detection PPDU of enhancement according to the mode indication field；
Wherein, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
At least one symbol of the lead code of the detection PPDU is partly or completely replicated in time domain or frequency domain; the intersymbol protection interval of some or all of the detection PPDU is greater than the first preset value; the modulation coding scheme MCS of at least one symbol of the detection PPDU meets a certain preset condition and the Fourier of at least one symbol of the detection PPDU changes order higher than the second preset value.
In conjunction with any one in the 5th aspect of the embodiment of the present invention, the first to second implementation of the 5th aspect, in the third implementation of the 5th aspect of the embodiment of the present invention, the channel information includes the delay between the extended delays and/or multi-user of channel；
2nd PPDU measures the delay between the extended delays and/or multi-user of channel for the destination network device using the 2nd PPDU, and the delay between the extended delays and/or multi-user of the channel obtained according to measurement carries out the adaptive adjustment of protection interval.
In conjunction with any one in the 5th aspect of the embodiment of the present invention, the first to second implementation of the 5th aspect, in the 4th kind of implementation of the 5th aspect of the embodiment of the present invention, the channel information includes the SNR of channel；
2nd PPDU measures the SNR of channel for the destination network device using the 2nd PPDU, and the SNR of the channel obtained according to measurement carries out the adaptive adjustment of MCS.
6th aspect of the embodiment of the present invention provides a kind of network equipment, comprising:
Generation unit, for generating PPDU；Wherein, the PPDU indicates the network equipment active transmission channel information measurement as a result, the PPDU further includes mode indication field, and the mode indication field is used to indicate the mode of detection PPDU used in the network equipment measurement channel information；
Transmission unit, for sending the PPDU to destination network device, wherein, the PPDU determines target channel information measurement result according to the mode indication field for the destination network device, and carries out link circuit self-adapting adjustment according to the target channel information measurement result.
In conjunction with the 6th aspect of the embodiment of the present invention; in the first implementation of the 6th aspect of the embodiment of the present invention, the mode for detecting PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
In conjunction with the 6th aspect of the embodiment of the present invention or the first implementation of the 6th aspect, in second of implementation of the 6th aspect of the embodiment of the present invention, the channel information includes the delay between the extended delays and/or multi-user of channel；
The PPDU determines target channel information measurement result according to the mode indication field for the destination network device, and the adaptive adjustment of protection interval is carried out according to the target channel information measurement result.
In conjunction with the 6th aspect of the embodiment of the present invention or the first implementation of the 6th aspect, in the third implementation of the 6th aspect of the embodiment of the present invention, the channel information includes the Signal to Noise Ratio (SNR) of channel；
The PPDU determines target channel information measurement result according to the mode indication field for the destination network device, and the adaptive adjustment of MCS is carried out according to the target channel information measurement result.
In technical solution provided in an embodiment of the present invention, first network equipment obtains target channel information measurement result, which is to measure the measurement result that channel information obtains according to the detection physical layer protocol data unit PPDU of target pattern；And link circuit self-adapting adjustment is carried out according to the target channel information measurement result, therefore compared with the existing technology, the embodiment of the present invention can flexibly obtain the measurement result obtained using the detection PPDU measurement channel information of a certain AD HOC, with the different demands being adapted under different application scene, the flexibility ratio for improving channel information measurement, to provide accurate link circuit self-adapting for user.
Detailed description of the invention
Fig. 1 is the form schematic diagram of mac frame in IEEE 802.11n standard；
Fig. 2 is the form schematic diagram of HT control field in IEEE 802.11n standard；
Fig. 3 is the form schematic diagram of link adaptation control field in Fig. 2；
Fig. 4 is the form schematic diagram of HT control field in IEEE 802.11ac standard；
Fig. 5 is chain circuit self-adaptive method one embodiment schematic diagram of WLAN in the embodiment of the present invention；
Fig. 6 is another embodiment schematic diagram of chain circuit self-adaptive method of WLAN in the embodiment of the present invention；
Fig. 7 is that a kind of form schematic diagram of PPDU is detected in the embodiment of the present invention；
Fig. 8 is another embodiment schematic diagram of chain circuit self-adaptive method of WLAN in the embodiment of the present invention；
Fig. 9 is another embodiment schematic diagram of chain circuit self-adaptive method of WLAN in the embodiment of the present invention；
Figure 10 is a kind of form schematic diagram of HT control field in the embodiment of the present invention；
Figure 11 is another embodiment schematic diagram of chain circuit self-adaptive method of WLAN in the embodiment of the present invention；
Figure 12 is another embodiment schematic diagram of chain circuit self-adaptive method of WLAN in the embodiment of the present invention；
Figure 13 is another embodiment schematic diagram of chain circuit self-adaptive method of WLAN in the embodiment of the present invention；
Figure 14 is another embodiment schematic diagram of chain circuit self-adaptive method of WLAN in the embodiment of the present invention；
Figure 14 a is another form schematic diagram of HT control field in the embodiment of the present invention；
Figure 15 is network equipment one embodiment schematic diagram in the embodiment of the present invention；
Figure 16 is another embodiment schematic diagram of the network equipment in the embodiment of the present invention；
Figure 17 is another embodiment schematic diagram of the network equipment in the embodiment of the present invention；
Figure 18 is another embodiment schematic diagram of the network equipment in the embodiment of the present invention；
Figure 19 is another embodiment schematic diagram of the network equipment in the embodiment of the present invention.
Specific embodiment
The embodiment of the invention provides the chain circuit self-adaptive method of WLAN a kind of and the network equipments, and the flexibility ratio of channel information measurement can be improved, and provide accurate link circuit self-adapting for user, are described in detail separately below.
Following will be combined with the drawings in the embodiments of the present invention, and technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
It should be noted that, the embodiment of the present invention is applied to the ofdma communication system in WLAN, the ofdma communication system includes first network equipment and at least one second network equipment, wherein, at least one above-mentioned second network equipment is wirelessly communicated to connect with the first network equipment.
For example, first network equipment can be AP (Access Point, access point), then second network equipment is STA (Station, website), alternatively, may be STA in first network equipment, then second network equipment is AP.
It should be noted that, only using link circuit self-adapting between AP and STA as concrete application scene, illustratively being illustrated the principle of the present invention and embodiment in following each embodiment.
To facilitate understanding of the present embodiment of the invention, the relevant technologies that can be introduced in description of the embodiment of the present invention or term is described below:
One, high-throughput control field
AP or STA passes through MPDU (Medium Access Control Protocol Data Unit, media access control protocol data unit, abbreviation mac frame) in HT (High Throughput, high-throughput) control field carry out link circuit self-adapting.
As shown in Figure 1, for the form schematic diagram of mac frame in IEEE 802.11n standard.Wherein, HT control field includes in the frame head of mac frame, for indicating information such as link circuit self-adapting and calibrating positions, the HT control field is generally present in control package (Control Wrapper) frame, or in the QoS data frame when the sequential bits of frame control field are arranged to 1.
The format of HT control field in some existing standards is simply introduced below, such as: the HT control field of VHT (Very High Throughput, very high-throughput) mutation in the HT control field and IEEE 802.11ac standard of HT mutation in IEEE802.11n standard.
As shown in Figure 2, for the form schematic diagram of HT control field in IEEE 802.11n standard (i.e. the HT control field of HT mutation), wherein, link adaptation control field in Fig. 2 in HT control field is for indicating information relevant to link circuit self-adapting, for details, reference can be made to Fig. 3, are the form schematic diagram of link adaptation control field.
Below to one of MCS (Modulation and Coding Scheme in IEEE 802.11n standard, modulation and coding strategy) link circuit self-adapting process in simply introduced, hereinafter referred to as TRQ (Training Request, probe requests thereby) mode: link adaptation request end sends PPDU (the Physical Layer Protocol Data Unit of the HT control field including HT mutation to responder, physical layer protocol data unit), wherein, TRQ is set to 1, needs responder to send a detection PPDU with instruction；Respondent generates detection PPDU according to the HT control field of above-mentioned HT mutation and sends detection PPDU to link adaptation request end；Link adaptation request end then measures channel information according to detection PPDU and carries out link circuit self-adapting adjustment according to channel information.
On the basis of IEEE 802.11n standard, people more fully design the HT control field of the VHT mutation in IEEE 802.11ac standard, as shown in figure 4, for the form schematic diagram of HT control field (i.e. the HT control field of VHT mutation) in IEEE 802.11ac standard.The HT control field of the HT control field multiplexing HT mutation of VHT mutation, wherein, use be originally in the HT control field of HT mutation reservation bit first bit as VHT bit, and two kinds of version is distinguished with VHT bit, when VHT bit is set to 0, it indicates that current HT control field is the HT control field of HT mutation, when VHT bit is set to 1, indicates that current HT control field is the HT control field of VHT mutation.
Below to simply being introduced in the link circuit self-adapting process of the two of them MCS in IEEE 802.11ac standard, including request-feedback mechanism and unsolicited mode-feedback mechanism:
In a kind of link circuit self-adapting process of request-feedback mechanism, link adaptation request end sends detection PPDU to responder, wherein, VHT is set to 1, to indicate that current HT control field is the HT control field of VHT mutation, VHT is set to 1, MRQ (MCS request) and is set to 1, needs responder to carry out MCS feedback with instruction；Then responder is using above-mentioned detection PPDU measurement channel information and to link adaptation request end feedback channel information measurement result, so that link adaptation request end carries out link circuit self-adapting adjustment according to channel information measurement result.
Unsolicited-feedback mechanism refers to active feedback end in the case where Correspondent Node does not send feedback request, for any frame or multiframe data active feedback channel information measurement result sent before Correspondent Node.In a kind of link circuit self-adapting process of unsolicited-feedback mechanism, active feedback end actively sends the PPDU of the HT control field including VHT mutation to its Correspondent Node, wherein, VHT is set to 1, to indicate that current HT control field is the HT control field of VHT mutation, Unsolicited MFB (Unsolicited MCS feedback indicator, unsolicited MCS feedback is guided) it is set to 1, by indicate MCS feedback be it is unsolicited in a manner of active feedback, and in MFB (MCS feedback, MCS feedback) the corresponding channel information measurement result of field carrying, so that Correspondent Node carries out link circuit self-adapting adjustment according to channel information measurement result.
It should be noted that, herein to some public informations in HT control field, such as MSI/STBC (MCS request sequence guide/space-time block coding) field is not introduced, and those skilled in the art can refer to the regulation in existing relevant criterion and subsequent relevant criterion.
Two, link circuit self-adapting
In the present embodiment, the parameter that link circuit self-adapting is adjusted may include at least one of parameters such as MCS, GI (Guard Interval, protection interval), redundancy, transmission power and running time-frequency resource.In the present embodiment, measuring the used channel parameter of channel information can determine according to the parameter that link circuit self-adapting is adjusted, such as SNR (the Signal to Noise Ratio of channel, signal-to-noise ratio), the delay between the extended delays or multi-user of channel etc., accordingly, during the link circuit self-adapting of request-feedback mechanism and unsolicited-feedback mechanism, it includes plurality of kinds of contents that the channel information measurement result that measurement channel information obtains is also corresponding, for example, MCS, GI or day line options etc..
Such as the link circuit self-adapting of MCS, when the parameter that i.e. link circuit self-adapting is adjusted is MCS, channel information may include SNR (the Signal to Noise Ratio of channel, signal-to-noise ratio), corresponding channel information measurement result may include: the space-time flow amount of suggestion, the MCS of suggestion, suggestion MCS used by band Width, average efficient SNR etc..
Such as the link circuit self-adapting of GI, i.e., when the parameter that link circuit self-adapting is adjusted is MCS, channel information may include the delay between the extended delays and/or multi-user of channel, and corresponding channel information measurement result may include the GI of suggestion.
It should be noted that, mainly using the link circuit self-adapting of GI as concrete application scene, illustratively being illustrated the principle of the present invention and embodiment in following some embodiments.
Referring to Fig. 5, chain circuit self-adaptive method one embodiment of WLAN includes: in the embodiment of the present invention
501, first network equipment obtains target channel information measurement result；
Wherein, target channel information measurement result is to measure the measurement result that channel information obtains according to the detection PPDU of target pattern, thus, step 501 is specific it is to be understood that first, first network equipment determines the detection PPDU of target pattern, then obtains the target channel information measurement result obtained using the detection PPDU measurement channel information of the target pattern.
In the present embodiment, first network equipment can determine the detection PPDU of target pattern according to application scenarios, i.e. under different application scenarios, choose the detection PPDU of the target pattern of corresponding adaptation, such as, first network equipment can be according to indoor scene or outdoor scene, channel information to be measured, the accuracy requirement of channel information, feedback efficiency requirement, busy situation of channel etc. determines the detection PPDU of target pattern in cell, herein without limitation to the selection rule of the mode of detection PPDU.
It should be noted that; in the present embodiment; the mode of detection PPDU may include that the bandwidth information for detecting PPDU, detection PPDU using the Fourier of indoor mode or outdoor mode, the LTF (Long Training Field, long training field) for detecting PPDU change order information and at least one of the protection interval information for detecting PPDU.Wherein, the bandwidth information for detecting PPDU refers to detection PPDU using which bandwidth；The Fourier for detecting the long training field of PPDU changes order information and refers to detection PPDU uses FFT (the Fast Fourier Transformation of which order, fast Fourier transform), for example, 64 points of FFT, or bigger FFT, such as 128 points of FFT or 256 points of FFT.
It can be understood that, in the present embodiment, in the link link circuit self-adapting process of different mechanisms, the mode for obtaining target channel information measurement result also will be different, specifically will continue to be discussed in detail in subsequent embodiment again herein for how obtaining target channel information measurement result.
502, first network equipment carries out link circuit self-adapting adjustment according to target channel information measurement result；
In the present embodiment, the referenced channel information measurement of link circuit self-adapting adjustment is carried out as a result, being using mesh Obtained from the detection PPDU of mark mode carries out channel information measurement, the channel information measurement result is just said current application scene more targeted as a result, can provide accurate link circuit self-adapting for user as a result,.
In technical solution provided in an embodiment of the present invention, first network equipment obtains target channel information measurement result, which is to measure the measurement result that channel information obtains according to the detection physical layer protocol data unit PPDU of target pattern；And link circuit self-adapting adjustment is carried out according to the target channel information measurement result, therefore compared with the existing technology, the embodiment of the present invention can flexibly obtain the measurement result obtained using the detection PPDU measurement channel information of a certain AD HOC, with the different demands being adapted under different application scene, the flexibility ratio for improving channel information measurement, to provide accurate link circuit self-adapting for user.
It is introduced below from a kind of link circuit self-adapting process of the angle of first network equipment to TRQ mode, referring to Fig. 6, another embodiment of the chain circuit self-adaptive method of WLAN includes: in the embodiment of the present invention
601, first network equipment sends the first PPDU to second network equipment；
In the present embodiment, first PPDU indicates that second network equipment needs to send detection PPDU, it is to be understood that in actual application, first PPDU can indicate that second network equipment needs to send detection PPDU by its preamble field or the MPDU of its carrying, specifically herein without limitation.
In the present embodiment, first PPDU further includes mode indication field, such as, it is denoted as T-Mode (Required Training PPDU mode, the mode of the detection PPDU needed) field, the T-Mode field is used to indicate the detection PPDU that second network equipment generates target pattern, it can be understood that, in actual application, T-Mode field may include the first PPDU preamble field (such as, SIG-B field) in, it also may include in the MPDU of the first PPDU, specifically herein without limitation.
How to indicate that second network equipment generates the detection PPDU of target pattern the following detailed description of T-Mode field, individually below for example:
(1) first field；
Such as, first field is denoted as BW (Bandwidth, bandwidth) field, which is used to indicate the bandwidth that detection PPDU should be used, i.e. when the mode for detecting PPDU includes detecting the bandwidth information of PPDU, it can indicate which bandwidth detection PPDU uses by B/W field.
(2) second fields；
Such as, second field is denoted as Indoor/Outdoor (Indoor mode or Outdoor mode, indoor/outdoor mode) field, the Indoor/Outdoor field, which is used to indicate detection PPDU, to include detection PPDU using indoor mode or outdoor in the mode for detecting PPDU using indoor mode or outdoor mode When mode, detection PPDU can be indicated using indoor mode or outdoor mode by Indoor/Outdoor field.
(3) third field；
Such as, third field is denoted as NX_HE-LTF (N*64FFT of HE-LTF, the FFT order of efficient long training field) field, the order for the FFT that the long training field that the NX_HE-LTF field is used to indicate detection PPDU should use, i.e. when the Fourier that the mode for detecting PPDU includes the long training field for detecting PPDU changes order information, it can indicate detection PPDU uses the FFT of which order by NX_HE-LTF field, such as, in actual application, it can be on the basis of 64 points, the order of current FFT is expressed as N times of 64, wherein, N can be 1, 2, 4 etc..
(4) the 4th fields；
Such as; 4th field is denoted as GI field; the GI field is used to indicate the protection interval length that detection PPDU should be used; i.e. when the mode for detecting PPDU includes detecting the protection interval information of PPDU; it can indicate detection PPDU uses the GI of which length by GI field, for example, 0.4,0.8us; or longer GI, such as 1.6,2.4 or 3.2us.
It is understood that the information that the mode of detection PPDU can also be described comprising more parameters for detection PPDU specifically herein without limitation accordingly, can be set corresponding field and indicate relevant information.
602, first network equipment receives the 2nd PPDU that second network equipment is sent；
In the present embodiment, the 2nd PPDU is the detection PPDU for the target pattern that second network equipment is generated according to T-Mode field.
Such as, when Indoor/Outdoor field indicates that detection PPDU should be using outdoor mode, the detection PPDU (the detection PPDU of i.e. outdoor mode) of the corresponding target pattern generated is the detection PPDU of enhancement, referring to FIG. 7, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
(1) at least one symbol for detecting the lead code of PPDU is partly or completely replicated in time domain or frequency domain；
That is second network equipment carries out the partly or completely duplication in time domain or frequency domain to a certain symbol in lead code and is replicated completely in Fig. 7 to L-SIG symbol during generating detection PPDU.
(2) it detects the intersymbol GI of some or all of PPDU and is greater than the first preset value；
That is second network equipment is during generating detection PPDU, using longer GI, wherein the first preset value can be set according to actual scene, such as can be 0.8us, then the detection PPDU of outdoor mode can be used GI longer than conventional detection PPDU, and such as 1.6,2.4,3.2us etc., at this point, increasing GI helps to resist biggish extended delays in outdoor scene.
(3) MCS for detecting at least one symbol of PPDU meets a certain preset condition；
That is second network equipment is during generating detection PPDU, the MCS for detecting at least one symbol of PPDU has more robustness, such as, the MCS0 of most robust in from MCS0 to MCS9, or the MCS10 in IEEE802.11ah standard, robustness ratio MCS0 are more preferably, thus, in actual application, the signaling field or data field that detect PPDU can use the modulation coding scheme of MCS10.
(4) order for detecting the FFT of at least one symbol of PPDU is higher than the second preset value.
That is for second network equipment during generating detection PPDU, detection PPDU can use the FFT of bigger order, such as 128 points of FFT or 256 points of FFT, at this point, efficiency not only can be improved in bigger FFT, can also reduce the influence of extended delays bring.
It should be noted that, only the format of the detection PPDU of outdoor mode is described by way of example above, in practical applications, the format of the detection PPDU of outdoor mode can be combined use to above-mentioned format, it can also use and more other formats are set as needed, such as, indication field can also be re-introduced into, it is indicated for the changeable mode to subsequent field, such as, by a certain field in signaling field-A come the GI information etc. of indication signaling field-B, by a certain field of signaling field-B come the GI information etc. of indicator data field.
603, first network equipment measures channel information using the 2nd PPDU, obtains target channel information measurement result；
In the present embodiment, the 2nd PPDU is the detection PPDU of the target pattern generated according to T-Mode field, measures channel information using detection PPDU as a result, can obtain target channel information measurement result.
604, first network equipment carries out link circuit self-adapting adjustment according to target channel information measurement result；
Optionally, in the present embodiment, channel information includes the delay between the extended delays and/or multi-user of channel, and corresponding target channel information measurement result is target GI, then step 604 specifically: first network equipment carries out the adaptive adjustment of GI according to target GI.
Alternatively, in the present embodiment, channel information also may include the SNR of channel, corresponding target channel information measurement result is target MCS, then step 604 specifically: first network equipment carries out the adaptive adjustment of MCS according to target MCS.
It is understood that in the present embodiment, measurement the used channel parameter of channel information can be determined according to the parameter that link circuit self-adapting is adjusted.
In technical solution provided in an embodiment of the present invention, first network equipment sends the first PPDU to second network equipment, wherein, first PPDU instruction needs second network equipment to send detection PPDU, and the first PPDU further include mode indication field, the mode indication field be used to indicate second network equipment generate target pattern detection PPDU；And receive the 2nd PPDU, wherein the 2nd PPDU is the detection PPDU for the target pattern that second network equipment is generated according to mode indication field；Then channel information is measured using the 2nd PPDU, obtains target channel information measurement result, and link circuit self-adapting adjustment is carried out according to the target channel information measurement result.Therefore compared with the existing technology, the embodiment of the present invention also carries mode indication field in the first PPDU, it is specified with the mode to detection PPDU, so as to use the detection PPDU of associative mode to measure channel information, obtain corresponding channel information measurement result, thus, the embodiment of the present invention can flexibly obtain the measurement result obtained using the detection PPDU measurement channel information of a certain AD HOC, with the different demands being adapted under different application scene, the flexibility ratio for improving channel information measurement, to provide accurate link circuit self-adapting for user.
It is introduced below from a kind of link circuit self-adapting process of the angle of second network equipment to TRQ mode, referring to Fig. 8, another embodiment of the chain circuit self-adaptive method of WLAN includes: in the embodiment of the present invention
801, second network equipment receives the first PPDU that first network equipment is sent；
In the present embodiment, first PPDU indicates that second network equipment needs to send detection PPDU, it is to be understood that in actual application, first PPDU can indicate that second network equipment needs to send detection PPDU by its preamble field or the MPDU of its carrying, specifically herein without limitation.
In the present embodiment, first PPDU further includes mode indication field, the mode indication field is used to indicate the detection PPDU that second network equipment generates target pattern, specifically can be with reference to the description of step 601 in embodiment illustrated in fig. 6 herein in regard to the explanation of mode indication field, and details are not described herein again.
802, second network equipment generates the 2nd PPDU of target pattern according to mode indication field；
In the present embodiment, second network equipment reads mode indication field therein after the first PPDU for receiving the transmission of first network equipment, and the spy of respective objects mode is generated according to the mode indication field Survey PPDU, i.e. the 2nd PPDU.
803, second network equipment sends the 2nd PPDU to first network equipment；
Wherein, the 2nd PPDU measures channel information using the 2nd PPDU for first network equipment, obtains target channel information measurement result, and carry out link circuit self-adapting adjustment according to the target channel information measurement result.
Below on the basis of Fig. 6,8 illustrated embodiment, for indication field includes in the HT control field of the first PPDU in mode, the chain circuit self-adaptive method of WLAN of TRQ mode a kind of is described in detail, Fig. 9 is referred to, another embodiment of the chain circuit self-adaptive method of WLAN includes: in the embodiment of the present invention
901, first network equipment sends the first PPDU to second network equipment；
Wherein, the first PPDU carries at least one MPDU, and MPDU instruction needs second network equipment to send detection PPDU, such as, in actual application, it can indicate to need second network equipment to send detection PPDU by the way that TRQ bit is set 1, specifically please refer to Figure 10.
In the present embodiment, MPDU includes HT control field, and HT control field further includes T-Mode field, which is used to indicate the detection PPDU that second network equipment generates target pattern, in Figure 10: B/W field is used to indicate the bandwidth that detection PPDU should be used；Indoor/Outdoor field is used to indicate the order that detection PPDU using indoor mode or outdoor mode, NX_HE-LTF field, should be used to indicate the FFT that the long training field of detection PPDU should use；GI field is used to indicate the protection interval length that detection PPDU should be used.
It is understood that the T-Mode field can also be comprising more indicative fields of parameter for detection PPDU, specifically herein without limitation.
In actual application, T-Mode field can be configured according to application scenarios, it is indicated with the target pattern to detection PPDU, wherein, application scenarios include indoor scene or outdoor scene, channel information to be measured, the accuracy requirement of channel information, feedback efficiency requires, and the busy situation etc. of channel in cell is exemplified below:
If first network equipment is indoor scene, then indoor mode can be set by the Indoor/Outdoor field of T-Mode field, thus, generate the detection PPDU of indoor mode, the GI of detection PPDU is shorter, as 0.8us minimizes second network equipment and send expense caused by detection PPDU to guarantee under the premise of first network equipment gets channel information measurement result.
If first network equipment channel information to be measured is extended delays, then longest GI can be set by the GI field of T-Mode field, to guarantee that the GI length of the long training field of detection PPDU is greater than the extended delays of present channel, otherwise the signal on the multiple diameters of channel can overlap, even if receive detection PPDU, also can not correct measurement present channel extended delays.
If first network equipment is higher to the accuracy requirement of channel information, the channel information for measuring all subcarriers is such as wished, then can set 4X HE-LTF for the NX_HE-LTF field of T-Mode field；Wherein, if the channel correlation properties of channel adjacent sub-carrier are higher, then 1X HE-LTF or 2X HE-LTF can be set by the NX_HE-LTF field of T-Mode field, at this time, first network equipment carries out interpolation by the channel measured to 1X HE-LTF or 2X HE-LTF, under the premise of obtaining the channel information on all subcarriers, minimizes second network equipment and send expense caused by detection PPDU.
Also such as, currently according to the busy situation of channel in cell, when having higher efficiency of transmission on a certain channel (such as 20M), 20M bandwidth can be set by the B/W field of T-Mode field, thus, second network equipment can quickly get the chance of transmission detection PPDU, so that first network equipment carries out the measurement of channel information as early as possible.
It should be noted that, the concrete mode of first network equipment setting T-Mode field only is illustrated with several examples above, and in practical applications, first network equipment can be combined use to above-mentioned set-up mode, can also be using other set-up modes, specific set-up mode is herein without limitation.
Specifically herein in regard to the description of T-Mode field can with reference to step 601 in embodiment illustrated in fig. 6, herein below on the basis of, the specific format of T-Mode field is described in detail:
Firstly, it is necessary to which explanation can add new version identifier field in the present embodiment for the MPDU in the embodiment of the present invention, for example, being denoted as HE bit, the HT control field in the embodiment of the present invention can be understood as the HT control field of HE mutation as a result,.In actual application, to realize the backward compatible of version, on the basis of the HT control field of VHT mutation, HE bit is set in the latter bit position of VHT bit.It is understood that can not also include above-mentioned version identifier field in certain specific application scenarios.
In the present embodiment, the specific location to T-Mode field and bit number without limitation, such as, as shown in Figure 10, B/W field may include 2 bits, and Indoor/Outdoor field may include a bit, NX_HE-LTF field may include 2 bits, and GI field may include 2 bits.
Optionally, in the present embodiment, MPDU can also include the 5th field, for example, being denoted as Required (Number of Training PPDU need to be transmitted, the number for the detection PPDU for needing to send) field, the Required field are used to indicate the quantity that second network equipment needs to send detection PPDU.Certainly, in some other embodiment, which also may include the other parts in the first PPDU, in preamble field.
Optionally, in the present embodiment, MPDU may include control package (Control Wrapper) frame, QoS data frame, beacon frame, probing response frame or association response frame when the sequential bits of frame control field are arranged to 1 etc..In actual application, can also include other kinds of some frames, specifically herein to the frame type of MPDU without limitation.
902, second network equipment generates the 2nd PPDU of target pattern according to mode indication field；
In the present embodiment, second network equipment reads T-Mode field therein after the first PPDU for receiving the transmission of first network equipment, and the detection PPDU, i.e. the 2nd PPDU of respective objects mode are generated according to the T-Mode field.
In the present embodiment, it is corresponding with Required field, 2nd PPDU can also include the 6th field, such as, it is denoted as Remaining (Number of Remaining Training PPDU need to be transmitted, residue need send detection PPDU number) field, the Remaining field be used to indicate second network equipment it is subsequent can also send detection PPDU quantity.
Specifically can be with reference to the step 602 in embodiment illustrated in fig. 6 herein in regard to the explanation of detection PPDU, details are not described herein again.
903, second network equipment sends the 2nd PPDU to first network equipment；
904, first network equipment measures channel information using the 2nd PPDU, obtains target channel information measurement result；
905, first network equipment carries out link circuit self-adapting adjustment according to target channel information measurement result；
Step 904 in the present embodiment is to 905 identical to 604 processes as the step 603 in embodiment illustrated in fig. 6, and specific details are not described herein again.
In order to make it easy to understand, being introduced with a kind of GI link circuit self-adapting process of the concrete application scene to TRQ mode below with reference to HT control field shown in Fig. 10, please referring to Figure 11, chain circuit self-adaptive method one embodiment of WLAN includes: in the embodiment of the present invention
1101, AP sends the first PPDU for carrying the HT control field of HE mutation to STA；
In the present embodiment, the VHT bit of HT control field and HE bit are set 1, with instruction Current HT control field is the HT control field of HE mutation；TRQ is set 1, to indicate that the GI link circuit self-adapting of TRQ mode will be carried out；Then T-Mode field and Required field are set.
1102, STA generates the 2nd PPDU of target pattern according to the first PPDU；
In the present embodiment, STA reads MPDU, wherein, it learns that needs send detection PPDU by TRQ, and further reads T-Mode field, learn the mode for the detection PPDU that needs are sent, and read Required field, the number of detection PPDU for needing to send is obtained, and generates corresponding detection PPDU, i.e. the 2nd PPDU.In the present embodiment, 2nd PPDU carries HT control field, and the VHT bit of HT control field and HE bit are set 1, to indicate that current HT control field is the HT control field of HE mutation, then Remaining field is set, to indicate the subsequent quantity that can also send detection PPDU of STA.
1103, STA sends the 2nd PPDU to AP；
1104, AP obtains target GI using the delay between the extended delays and/or multi-user of the 2nd PPDU measurement channel；
Wherein, AP measures the delay between extended delays and/or multi-user by the long training field of the 2nd PPDU.
1105, AP carries out the adaptive adjustment of GI according to target GI；
In the present embodiment, AP can carry out the adaptive adjustment of GI after obtaining target GI according to target GI.
It is introduced below from a kind of link circuit self-adapting process of the angle of first network equipment to unsolicited-feedback mechanism, please refers to Figure 12, another embodiment of the chain circuit self-adaptive method of WLAN includes: in the embodiment of the present invention
1201, first network equipment receives the PPDU that second network equipment is sent；
In the present embodiment, PPDU indicates the second network equipment active transmission channel information measurement result, to indicate that the link circuit self-adapting of unsolicited-feedback mechanism will be carried out, it can be understood that, in actual application, PPDU can indicate the second network equipment active transmission channel information measurement by its preamble field or the MPDU of its carrying as a result, specifically herein without limitation.
In the present embodiment, first PPDU further includes mode indication field, for example, being denoted as T-Mode (Training PPDU mode, detect PPDU mode) field, the T-Mode field be used to indicate second network equipment measurement channel information used in detection PPDU mode；It is understood that in reality In application process, it also may include in the MPDU of the first PPDU, specifically herein without limitation that T-Mode field, which may include in the preamble field (for example, SIG-B field) of the first PPDU,.
The mode that PPDU is detected used in second network equipment measurement channel information how is indicated the following detailed description of T-Mode field, individually below for example:
(1) first field；
Such as, first field is denoted as BW (Bandwidth, bandwidth) field, which is used to indicate the bandwidth that detection PPDU is used, i.e. when the mode for detecting PPDU includes detecting the bandwidth information of PPDU, it can indicate which bandwidth detection PPDU is using by B/W field.
(2) second fields；
Such as, second field is denoted as Indoor/Outdoor (Indoor mode or Outdoor mode, indoor/outdoor mode) field, the Indoor/Outdoor field is used to indicate detection PPDU using indoor mode or outdoor mode, i.e. when the mode for detecting PPDU includes that detection PPDU uses indoor mode or outdoor mode, it can indicate that detection PPDU is to use indoor mode or outdoor mode by Indoor/Outdoor field.
(3) third field；
Such as, third field is denoted as NX_HE-LTF (N*64FFT of HE-LTF, the FFT order of efficient long training field) field, the order for the FFT that the long training field that the NX_HE-LTF field is used to indicate detection PPDU uses, i.e. when the Fourier that the mode for detecting PPDU includes the long training field for detecting PPDU changes order information, can indicate detection PPDU is the FFT using which order by NX_HE-LTF field, such as, in actual application, it can be on the basis of 64 points, the order of current FFT is expressed as N times of 64, wherein, N can be 1, 2, 4 etc..
(4) the 4th fields；
Such as; 4th field is denoted as GI field; the GI field is used to indicate the protection interval length that detection PPDU is used; i.e. when the mode for detecting PPDU includes detecting the protection interval information of PPDU; it can indicate that detection PPDU is the GI using which length by GI field, for example, 0.4,0.8us; or longer GI, such as 1.6,2.4 or 3.2us.
It is understood that the information that the mode of detection PPDU can also be described comprising more parameters for detection PPDU specifically herein without limitation accordingly, can be set corresponding field and indicate relevant information.
It should be noted that second network equipment actively can send multiple PPDU to first network equipment, in the link circuit self-adapting process of unsolicited-feedback mechanism so as to incessantly to the multiple channel information measurement results of first network equipment active feedback.It can be understood that, in actual application, second network equipment can measure channel information in the detection PPDU of arbitrary patterns, such as, the detection PPDU measurement channel information of outdoor mode can be used in second network equipment, or second the network equipment detection PPDU of indoor mode can be used (channel information can be measured with reference to the step 602) in embodiment illustrated in fig. 6 herein in regard to the detection PPDU of outdoor mode, specifically herein without limitation.
1202, first network equipment determines target channel information measurement result according to mode indication field；
In the present embodiment, after receiving PPDU, first network equipment can know channel information measurement indicated by the PPDU according to mode indication field the result is that obtaining using the detection PPDU measurement of which kind of mode, and determine whether that the measurement result for selecting the detection PPDU for using mode measurement channel information to obtain adaptively adjusts referenced channel information measurement result as following link, if so, determining that the channel information measurement result is target channel information measurement result.
It can be understood that, in the link circuit self-adapting process of unsolicited-feedback mechanism, first network equipment can receive in multiple PPDU of second network equipment transmission, and according to the instruction of mode indication field, know that the channel information measurement result in each PPDU is obtained using the detection PPDU measurement of which kind of mode respectively, thus, first network equipment is wanted to obtain the measurement result obtained using the detection PPDU measurement channel information of a certain AD HOC, it need to only be chosen according to the instruction of mode indication field, with the different demands being adapted under different application scene.
1203, first network equipment carries out link circuit self-adapting adjustment according to target channel information measurement result；
In the present embodiment, target channel information measurement result is the measurement result obtained using the detection PPDU measurement channel information of a certain AD HOC specified by first network equipment, first network equipment can carry out link circuit self-adapting adjustment using the measurement result that the detection PPDU measurement channel information of which mode obtains with flexible choice as a result,.
In technical solution provided in an embodiment of the present invention, first network equipment receives the PPDU that second network equipment is sent, wherein, the PPDU indicates the second network equipment active transmission channel information measurement result, and the PPDU further includes mode indication field, which is used to indicate the mode of detection PPDU used in second network equipment measurement channel information；First network equipment determines target channel information measurement result according to mode indication field；And link circuit self-adapting adjustment is carried out according to the target channel information measurement result, as a result, First network equipment can carry out link circuit self-adapting adjustment using the measurement result that the detection PPDU measurement channel information of which mode obtains with flexible choice.Therefore compared with the existing technology, the embodiment of the present invention also carries mode indication field in PPDU, it is specified with the mode to detection PPDU used in measurement channel information, so that first network equipment knows channel information measurement the result is that being obtained using the detection PPDU measurement of which kind of mode, thus, the embodiment of the present invention can flexibly obtain the measurement result obtained using the detection PPDU measurement channel information of a certain AD HOC, with the different demands being adapted under different application scene, improve the flexibility ratio of channel information measurement, to provide accurate link circuit self-adapting for user.
It is introduced below from a kind of link circuit self-adapting process of the angle of second network equipment to unsolicited-feedback mechanism, please refers to Figure 13, another embodiment of the chain circuit self-adaptive method of WLAN includes: in the embodiment of the present invention
1301, second network equipment generates PPDU；
In the present embodiment, the PPDU indicates the second network equipment active transmission channel information measurement result, to indicate that the link circuit self-adapting of unsolicited-feedback mechanism will be carried out, it can be understood that, in actual application, PPDU can indicate the second network equipment active transmission channel information measurement by its preamble field or the MPDU of its carrying as a result, specifically herein without limitation.
In the present embodiment, PPDU further includes mode indication field, the mode indication field is used to indicate the mode of detection PPDU used in second network equipment measurement channel information, specifically can be with reference to the description of step 1201 in embodiment illustrated in fig. 12 herein in regard to the explanation of mode indication field, details are not described herein again.
It should be noted that second network equipment actively can send multiple PPDU to first network equipment, in the link circuit self-adapting process of unsolicited-feedback mechanism so as to incessantly to the multiple channel information measurement results of first network equipment active feedback.It can be understood that, in actual application, second network equipment can measure channel information in the detection PPDU of arbitrary patterns, such as, the detection PPDU measurement channel information of outdoor mode can be used in second network equipment, or second the network equipment detection PPDU of indoor mode can be used (channel information can be measured with reference to the step 602) in embodiment illustrated in fig. 6 herein in regard to the detection PPDU of outdoor mode, specifically herein without limitation.
1302, second network equipment sends PPDU to first network equipment；
In the present embodiment, PPDU determines target channel information measurement result according to mode indication field for first network equipment, and carries out link circuit self-adapting adjustment according to the target channel information measurement result.Target channel information measurement result is specifically determined according to mode indication field herein for first network equipment, and according to this The process that target channel information measurement result carries out link circuit self-adapting adjustment can be with reference to the step 1202 and step 1203 in embodiment illustrated in fig. 12.
Below on the basis of Figure 12,13 illustrated embodiment, for indication field includes in the HT control field of PPDU in mode, the chain circuit self-adaptive method of WLAN of unsolicited-feedback mechanism a kind of is described in detail, referring to Figure 14, another embodiment of chain circuit self-adaptive method of WLAN includes: in the embodiment of the present invention
1401, second network equipment generates PPDU；
In the present embodiment, PPDU carries at least one MPDU, and the MPDU indicates the second network equipment active transmission channel information measurement as a result, to indicate that the link circuit self-adapting of unsolicited-feedback mechanism will be carried out.It is understood that the MPDU also carries channel information measurement result.Such as, in actual application, it can be by by Unsolicited MFB (Unsolicited GI Feedback, unsolicited formula GI feedback) field sets 1 to indicate the second network equipment active transmission channel information measurement result, wherein, channel information measurement result carries in GFB (GI Feedback, GI feedback) field, with the GI suitable to the instruction of first network equipment, Figure 14 a is specifically please referred to.
In the present embodiment, MPDU includes HT control field, and HT control field further includes T-Mode field, which is used to indicate the mode of detection PPDU used in second network equipment measurement channel information, in Figure 14 a: B/W field is used to indicate the bandwidth that detection PPDU is used；Indoor/Outdoor field is used to indicate and detects PPDU using indoor mode or outdoor mode, NX_HE-LTF field, is used to indicate the order of the FFT of the long training field use of detection PPDU；GI field is used to indicate the protection interval length that detection PPDU is used.
It is understood that the T-Mode field can also be comprising more indicative fields of parameter for detection PPDU, specifically herein without limitation.It specifically can be with reference to step 1201 in embodiment illustrated in fig. 12 herein in regard to the description of T-Mode field.In the present embodiment, the specific location to T-Mode field and bit number without limitation, specifically herein can be with reference to the steps 901 in embodiment illustrated in fig. 9.
Optionally, in the present embodiment, MPDU may include control package (Control Wrapper) frame, QoS data frame, probe request or association request frame when the sequential bits of frame control field are arranged to 1 etc..In actual application, can also include other kinds of some frames, specifically herein to the frame type of MPDU without limitation.
1402, second network equipment sends PPDU to first network equipment；
1403, first network equipment determines target channel information measurement result according to mode indication field；
1404, first network equipment carries out link circuit self-adapting adjustment according to target channel information measurement result；
Step 1403 in the present embodiment is to 1404 identical to 1203 processes as the step 1202 in embodiment illustrated in fig. 12, and details are not described herein again.
The chain circuit self-adaptive method of the WLAN in the embodiment of the present invention is described above, the network equipment in the embodiment of the present invention is described below, please refers to Figure 15, network equipment one embodiment includes: in the embodiment of the present invention
The process of embodiment illustrated in fig. 5 may be implemented in the network equipment in the embodiment of the present invention, and the network equipment includes:
Acquiring unit 1510, for obtaining target channel information measurement result, the target channel information measurement result is to measure the measurement result that channel information obtains according to the detection physical layer protocol data unit PPDU of target pattern；
Adjustment unit 1520, for carrying out link circuit self-adapting adjustment according to the target channel information measurement result.
For ease of understanding, below by taking a concrete application scene as an example, the inner working process of the network equipment in the present embodiment is described:
Acquiring unit 1510 obtains target channel information measurement result, and the target channel information measurement result is to measure the measurement result that channel information obtains according to the detection physical layer protocol data unit PPDU of target pattern；Adjustment unit 1520 carries out link circuit self-adapting adjustment according to the target channel information measurement result.
In technical solution provided in an embodiment of the present invention, the acquiring unit 1510 of the network equipment obtains target channel information measurement result, which is to measure the measurement result that channel information obtains according to the detection physical layer protocol data unit PPDU of target pattern；And link circuit self-adapting adjustment is carried out according to the target channel information measurement result by adjustment unit 1520, therefore compared with the existing technology, the embodiment of the present invention can flexibly obtain the measurement result obtained using the detection PPDU measurement channel information of a certain AD HOC, with the different demands being adapted under different application scene, the flexibility ratio for improving channel information measurement, to provide accurate link circuit self-adapting for user.
A kind of network equipment of TRQ mode is described below, referring specifically to Figure 16, another embodiment of the method for the network equipment includes: in the embodiment of the present invention
The process of embodiment illustrated in fig. 6 may be implemented in the network equipment in the embodiment of the present invention, and the network is set It is standby to include:
Sending module 1611, for sending the first PPDU to destination network device, wherein, the first PPDU instruction destination network device needs to send detection PPDU, and the first PPDU further includes mode indication field, the mode indication field is used to indicate the detection PPDU that destination network device generates target pattern；
First receiving module 1612, the 2nd PPDU sent for receiving the destination network device, wherein the 2nd PPDU is the detection PPDU for the target pattern that the destination network device is generated according to the mode indication field；
First obtains module 1613, for measuring channel information using the 2nd PPDU, obtains the target channel information measurement result；
Adjustment unit 1620, for carrying out link circuit self-adapting adjustment according to the target channel information measurement result.
Optionally; in the present embodiment, the mode for detecting PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
Optionally, in the present embodiment, the mode of the detection PPDU includes detection PPDU using indoor mode or outdoor mode；When mode indication field instruction destination network device generates the detection PPDU of outdoor mode, the 2nd PPDU is the detection PPDU for the enhancement that the destination network device is generated according to the mode indication field；
Wherein, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
At least one symbol of the lead code of the detection PPDU is partly or completely replicated in time domain or frequency domain; the intersymbol protection interval of some or all of the detection PPDU is greater than the first preset value; the modulation coding scheme MCS of at least one symbol of the detection PPDU meets a certain preset condition and the Fourier of at least one symbol of the detection PPDU changes order higher than the second preset value.
Optionally, in the present embodiment, the channel information includes the delay between the extended delays and/or multi-user of channel；
The adjustment unit 1620, specifically for carrying out the adaptive adjustment of protection interval according to the target channel information measurement result.
Optionally, in the present embodiment, the channel information includes the SNR of channel；
The adjustment unit 1620, specifically for being modulated the adaptive adjustment of coding strategy MCS according to the target channel information measurement result.
In technical solution provided in an embodiment of the present invention, the sending module 1611 of the network equipment sends the first PPDU to destination network device, wherein, first PPDU instruction needs destination network device to send detection PPDU, and the first PPDU further include mode indication field, the mode indication field be used to indicate destination network device generate target pattern detection PPDU；And the 2nd PPDU is received by the first receiving module 1612, wherein the 2nd PPDU is the detection PPDU for the target pattern that destination network device is generated according to mode indication field；Then module 1613 is obtained by first and measure channel information using the 2nd PPDU, obtain target channel information measurement result, and link circuit self-adapting adjustment is carried out according to the target channel information measurement result by adjusting unit 1620.Therefore compared with the existing technology, the embodiment of the present invention also carries mode indication field in the first PPDU, it is specified with the mode to detection PPDU, so as to use the detection PPDU of associative mode to measure channel information, obtain corresponding channel information measurement result, thus, the embodiment of the present invention can flexibly obtain the measurement result obtained using the detection PPDU measurement channel information of a certain AD HOC, with the different demands being adapted under different application scene, the flexibility ratio for improving channel information measurement, to provide accurate link circuit self-adapting for user.
Another network equipment of TRQ mode is described below, referring specifically to Figure 17, another embodiment of the method for the network equipment includes: in the embodiment of the present invention
The process of embodiment illustrated in fig. 8 may be implemented in the network equipment in the embodiment of the present invention, and the network equipment includes:
Receiving unit 1710, for receiving the first PPDU of destination network device transmission；Wherein, the first PPDU indicates that the network equipment needs to send detection PPDU, and the first PPDU further includes mode indication field, and the mode indication field is used to indicate the detection PPDU that the network equipment generates target pattern；
Generation unit 1720, for generating the detection PPDU of target pattern according to the mode indication field；
Transmission unit 1730, for sending the 2nd PPDU to the destination network device, wherein, 2nd PPDU measures channel information using the 2nd PPDU for the destination network device, the target channel information measurement result is obtained, and link circuit self-adapting adjustment is carried out according to the target channel information measurement result.
Optionally; in the present embodiment, the mode for detecting PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
Optionally, in the present embodiment, the mode of the detection PPDU includes detection PPDU using indoor mode or outdoor mode；When mode indication field instruction destination network device generates the detection PPDU of outdoor mode, the 2nd PPDU is the detection PPDU for the enhancement that the destination network device is generated according to the mode indication field；
Wherein, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
At least one symbol of the lead code of the detection PPDU is partly or completely replicated in time domain or frequency domain; the intersymbol protection interval of some or all of the detection PPDU is greater than the first preset value; the modulation coding scheme MCS of at least one symbol of the detection PPDU meets a certain preset condition and the Fourier of at least one symbol of the detection PPDU changes order higher than the second preset value.
Optionally, in the present embodiment, the channel information includes the delay between the extended delays and/or multi-user of channel；
2nd PPDU measures the delay between the extended delays and/or multi-user of channel for the destination network device using the 2nd PPDU, and the delay between the extended delays and/or multi-user of the channel obtained according to measurement carries out the adaptive adjustment of protection interval.
Optionally, in the present embodiment, the channel information includes the SNR of channel；
2nd PPDU measures the SNR of channel for the destination network device using the 2nd PPDU, and the SNR of the channel obtained according to measurement carries out the adaptive adjustment of MCS.
A kind of network equipment of unsolicited-feedback mechanism is described below, referring specifically to Figure 18, another embodiment of the method for the network equipment includes: in the embodiment of the present invention
The process of embodiment illustrated in fig. 12 may be implemented in the network equipment in the embodiment of the present invention, and the network equipment includes:
Second receiving module 1811, for receiving the PPDU of destination network device transmission；Wherein, for the PPDU instruction destination network device active transmission channel information measurement as a result, the PPDU further includes mode indication field, the mode indication field is used to indicate the mode of detection PPDU used in destination network device measurement channel information；
Second obtains module 1812, for determining target channel information measurement result according to the mode indication field；
Adjustment unit 1820, for carrying out link circuit self-adapting adjustment according to the target channel information measurement result.
Optionally; in the present embodiment, the mode for detecting PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
Optionally, in the present embodiment, the channel information includes the delay between the extended delays and/or multi-user of channel；
The adjustment unit 1820, specifically for carrying out the adaptive adjustment of protection interval according to the target channel information measurement result.
Optionally, in the present embodiment, the channel information includes the SNR of channel；
The adjustment unit 1820, specifically for being modulated the adaptive adjustment of coding strategy MCS according to the target channel information measurement result.
In technical solution provided in an embodiment of the present invention, second receiving module 1811 of the network equipment receives the PPDU that destination network device is sent, wherein, the PPDU indicates destination network device active transmission channel information measurement result, and the PPDU further includes mode indication field, which is used to indicate the mode of detection PPDU used in destination network device measurement channel information；And target channel information measurement result is determined according to mode indication field by the second acquisition module 1812；Link circuit self-adapting adjustment is carried out according to the target channel information measurement result by adjusting unit 1820 again, the network equipment can carry out link circuit self-adapting adjustment using the measurement result that the detection PPDU measurement channel information of which mode obtains with flexible choice as a result,.Therefore compared with the existing technology, the embodiment of the present invention also carries mode indication field in PPDU, it is specified with the mode to detection PPDU used in measurement channel information, so that the network equipment knows channel information measurement the result is that being obtained using the detection PPDU measurement of which kind of mode, thus, the embodiment of the present invention can flexibly obtain the measurement result obtained using the detection PPDU measurement channel information of a certain AD HOC, with the different demands being adapted under different application scene, improve the flexibility ratio of channel information measurement, to provide accurate link circuit self-adapting for user.
Another network equipment of unsolicited-feedback mechanism is described below, referring specifically to Figure 19, another embodiment of the method for the network equipment includes: in the embodiment of the present invention
The process of embodiment illustrated in fig. 13 may be implemented in the network equipment in the embodiment of the present invention, and the network equipment includes:
Generation unit 1910, for generating PPDU；Wherein, the PPDU indicates the network equipment active transmission channel information measurement as a result, the PPDU further includes mode indication field, and the mode indication field is used to indicate the mode of detection PPDU used in the network equipment measurement channel information；
Transmission unit 1920, for sending the PPDU to destination network device, wherein, the PPDU determines target channel information measurement result according to the mode indication field for the destination network device, and carries out link circuit self-adapting adjustment according to the target channel information measurement result.
Optionally; in the present embodiment, the mode for detecting PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
Optionally, in the present embodiment, the channel information includes the delay between the extended delays and/or multi-user of channel；
The PPDU determines target channel information measurement result according to the mode indication field for the destination network device, and the adaptive adjustment of protection interval is carried out according to the target channel information measurement result.
Optionally, in the present embodiment, the channel information includes the Signal to Noise Ratio (SNR) of channel；
The PPDU determines target channel information measurement result according to the mode indication field for the destination network device, and the adaptive adjustment of MCS is carried out according to the target channel information measurement result.
It is apparent to those skilled in the art that for convenience and simplicity of description, the specific work process of the system, apparatus, and unit of foregoing description can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method may be implemented in other ways.Such as, the apparatus embodiments described above are merely exemplary, such as, the division of the unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed mutual coupling, direct-coupling or communication connection can be through some interfaces, the indirect coupling or communication connection of device or unit, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, and component shown as a unit may or may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, the functional units in various embodiments of the present invention may be integrated into one processing unit, it is also possible to each unit and physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated unit both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and when sold or used as an independent product, can store in a computer readable storage medium.Based on this understanding, substantially all or part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products technical solution of the present invention in other words, the computer software product is stored in a storage medium, it uses including some instructions so that a computer equipment (can be personal computer, server or the network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), the various media that can store program code such as magnetic or disk.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although the present invention is described in detail referring to the foregoing embodiments, those skilled in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And these are modified or replaceed, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.

Claims (32)

  1. A kind of chain circuit self-adaptive method of WLAN characterized by comprising
    First network equipment obtains target channel information measurement result, and the target channel information measurement result is to measure the measurement result that channel information obtains according to the detection physical layer protocol data unit PPDU of target pattern；
    The first network equipment carries out link circuit self-adapting adjustment according to the target channel information measurement result.
  2. The chain circuit self-adaptive method of WLAN as described in claim 1, which is characterized in that the first network equipment obtains target channel information measurement result and includes:
    The first network equipment sends the first PPDU to second network equipment, wherein, first PPDU indicates that second network equipment needs to send detection PPDU, and the first PPDU further includes mode indication field, the mode indication field is used to indicate the detection PPDU that second network equipment generates target pattern；
    The first network equipment receives the 2nd PPDU that second network equipment is sent, wherein the 2nd PPDU is the detection PPDU for the target pattern that second network equipment is generated according to the mode indication field；
    The first network equipment measures channel information using the 2nd PPDU, obtains the target channel information measurement result.
  3. The chain circuit self-adaptive method of WLAN as described in claim 1, which is characterized in that the first network equipment obtains target channel information measurement result and includes:
    The first network equipment receives the PPDU that second network equipment is sent；Wherein, the PPDU indicates the second network equipment active transmission channel information measurement as a result, the PPDU further includes mode indication field, and the mode indication field is used to indicate the mode of detection PPDU used in second network equipment measurement channel information；
    The first network equipment determines target channel information measurement result according to the mode indication field.
  4. The chain circuit self-adaptive method of WLAN as described in any one of claims 1 to 3; it is characterized in that, the mode of detection PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
  5. The chain circuit self-adaptive method of WLAN as claimed in claim 2, which is characterized in that the mode of the detection PPDU includes detection PPDU using indoor mode or outdoor mode；
    When the mode indication field indicates that second network equipment generates the detection PPDU of outdoor mode, the 2nd PPDU is the detection PPDU for the enhancement that second network equipment is generated according to the mode indication field；
    Wherein, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
    At least one symbol of the lead code of the detection PPDU is partly or completely replicated in time domain or frequency domain; the intersymbol protection interval of some or all of the detection PPDU is greater than the first preset value; the modulation coding scheme MCS of at least one symbol of the detection PPDU meets a certain preset condition and the Fourier of at least one symbol of the detection PPDU changes order higher than the second preset value.
  6. The chain circuit self-adaptive method of WLAN as described in any one of claim 1 to 5, which is characterized in that the channel information includes the delay between the extended delays and/or multi-user of channel；
    The first network equipment carries out link circuit self-adapting adjustment according to the target channel information measurement result
    The first network equipment carries out the adaptive adjustment of protection interval according to the target channel information measurement result.
  7. The chain circuit self-adaptive method of WLAN as described in any one of claim 1 to 5, which is characterized in that the channel information includes the Signal to Noise Ratio (SNR) of channel；
    The first network equipment carries out link circuit self-adapting adjustment according to the target channel information measurement result
    The first network equipment is modulated the adaptive adjustment of coding strategy MCS according to the target channel information measurement result.
  8. A kind of chain circuit self-adaptive method of WLAN characterized by comprising
    Second network equipment receives the first PPDU that first network equipment is sent；Wherein, the first PPDU indicates that second network equipment needs to send detection PPDU, and the first PPDU further includes mode indication field, and the mode indication field is used to indicate the detection PPDU that second network equipment generates target pattern；
    Second network equipment generates the detection PPDU of target pattern according to the mode indication field；
    Second network equipment sends the 2nd PPDU to the first network equipment, wherein, 2nd PPDU measures channel information using the 2nd PPDU for the first network equipment, the target channel information measurement result is obtained, and link circuit self-adapting tune is carried out according to the target channel information measurement result It is whole.
  9. The chain circuit self-adaptive method of WLAN as claimed in claim 8; it is characterized in that, the mode of detection PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
  10. The chain circuit self-adaptive method of WLAN as claimed in claim 8, which is characterized in that the mode of the detection PPDU includes detection PPDU using indoor mode or outdoor mode；
    When the mode indication field indicates that second network equipment generates the detection PPDU of outdoor mode, second network equipment includes: according to the detection PPDU that the mode indication field generates target pattern
    Second network equipment generates the detection PPDU of enhancement according to the mode indication field；
    Wherein, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
    At least one symbol of the lead code of the detection PPDU is partly or completely replicated in time domain or frequency domain; the intersymbol protection interval of some or all of the detection PPDU is greater than the first preset value; the modulation coding scheme MCS of at least one symbol of the detection PPDU meets a certain preset condition and the Fourier of at least one symbol of the detection PPDU changes order higher than the second preset value.
  11. The chain circuit self-adaptive method of WLAN as described in any one of claim 8 to 10, which is characterized in that the channel information includes the delay between the extended delays and/or multi-user of channel；
    2nd PPDU measures the delay between the extended delays and/or multi-user of channel for the first network equipment using the 2nd PPDU, and the delay between the extended delays and/or multi-user of the channel obtained according to measurement carries out the adaptive adjustment of protection interval.
  12. The chain circuit self-adaptive method of WLAN as described in any one of claim 8 to 10, which is characterized in that the channel information includes the SNR of channel；
    2nd PPDU measures the SNR of channel for the first network equipment using the 2nd PPDU, and the SNR of the channel obtained according to measurement carries out the adaptive adjustment of MCS.
  13. A kind of chain circuit self-adaptive method of WLAN characterized by comprising
    Second network equipment generates PPDU；Wherein, the PPDU indicates the second network equipment active transmission channel information measurement as a result, the PPDU further includes mode indication field, and the mode indication field is used to indicate the mode of detection PPDU used in second network equipment measurement channel information；
    Second network equipment sends the PPDU to first network equipment, wherein, the PPDU determines target channel information measurement result according to the mode indication field for the first network equipment, and carries out link circuit self-adapting adjustment according to the target channel information measurement result.
  14. The chain circuit self-adaptive method of WLAN as claimed in claim 13; it is characterized in that, the mode of detection PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
  15. The chain circuit self-adaptive method of WLAN according to claim 13 or 14, which is characterized in that the channel information includes the delay between the extended delays and/or multi-user of channel；
    The PPDU determines target channel information measurement result according to the mode indication field for the first network equipment, and the adaptive adjustment of protection interval is carried out according to the target channel information measurement result.
  16. The chain circuit self-adaptive method of WLAN according to claim 13 or 14, which is characterized in that the channel information includes the Signal to Noise Ratio (SNR) of channel；
    The PPDU determines target channel information measurement result according to the mode indication field for the first network equipment, and the adaptive adjustment of MCS is carried out according to the target channel information measurement result.
  17. A kind of network equipment characterized by comprising
    Acquiring unit, for obtaining target channel information measurement result, the target channel information measurement result is to measure the measurement result that channel information obtains according to the detection physical layer protocol data unit PPDU of target pattern；
    Adjustment unit, for carrying out link circuit self-adapting adjustment according to the target channel information measurement result.
  18. The network equipment as claimed in claim 17, which is characterized in that the acquiring unit includes:
    Sending module, for sending the first PPDU to destination network device, wherein, the first PPDU instruction destination network device needs to send detection PPDU, and the first PPDU further includes mode indication field, the mode indication field is used to indicate the detection PPDU that destination network device generates target pattern；
    First receiving module, the 2nd PPDU sent for receiving the destination network device, wherein the 2nd PPDU is the detection PPDU for the target pattern that the destination network device is generated according to the mode indication field；
    First obtains module, for measuring channel information using the 2nd PPDU, obtains the target letter Road information measurement result.
  19. The network equipment as claimed in claim 17, which is characterized in that the acquiring unit includes:
    Second receiving module, for receiving the PPDU of destination network device transmission；Wherein, for the PPDU instruction destination network device active transmission channel information measurement as a result, the PPDU further includes mode indication field, the mode indication field is used to indicate the mode of detection PPDU used in destination network device measurement channel information；
    Second obtains module, for determining target channel information measurement result according to the mode indication field.
  20. The network equipment as described in any one of claim 17 to 19; it is characterized in that, the mode of detection PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
  21. The network equipment as claimed in claim 18, which is characterized in that the mode of the detection PPDU includes detection PPDU using indoor mode or outdoor mode；
    When mode indication field instruction destination network device generates the detection PPDU of outdoor mode, the 2nd PPDU is the detection PPDU for the enhancement that the destination network device is generated according to the mode indication field；
    Wherein, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
    At least one symbol of the lead code of the detection PPDU is partly or completely replicated in time domain or frequency domain; the intersymbol protection interval of some or all of the detection PPDU is greater than the first preset value; the modulation coding scheme MCS of at least one symbol of the detection PPDU meets a certain preset condition and the Fourier of at least one symbol of the detection PPDU changes order higher than the second preset value.
  22. The network equipment as described in any one of claim 17 to 21, which is characterized in that the channel information includes the delay between the extended delays and/or multi-user of channel；
    The adjustment unit, specifically for carrying out the adaptive adjustment of protection interval according to the target channel information measurement result.
  23. The network equipment as described in any one of claim 17 to 21, which is characterized in that the channel information includes the SNR of channel；
    The adjustment unit, specifically for being modulated coding plan according to the target channel information measurement result The slightly adaptive adjustment of MCS.
  24. A kind of network equipment characterized by comprising
    Receiving unit, for receiving the first PPDU of destination network device transmission；Wherein, the first PPDU indicates that the network equipment needs to send detection PPDU, and the first PPDU further includes mode indication field, and the mode indication field is used to indicate the detection PPDU that the network equipment generates target pattern；
    Generation unit, for generating the detection PPDU of target pattern according to the mode indication field；
    Transmission unit, for sending the 2nd PPDU to the destination network device, wherein, 2nd PPDU measures channel information using the 2nd PPDU for the destination network device, the target channel information measurement result is obtained, and link circuit self-adapting adjustment is carried out according to the target channel information measurement result.
  25. The network equipment as claimed in claim 24; it is characterized in that, the mode of detection PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
  26. The network equipment as claimed in claim 24, which is characterized in that the mode of the detection PPDU includes detection PPDU using indoor mode or outdoor mode；
    When the mode indication field indicates that the network equipment generates the detection PPDU of outdoor mode, the generation unit, specifically for generating the detection PPDU of enhancement according to the mode indication field；
    Wherein, the detection PPDU of the enhancement refers to the detection PPDU at least one of following format:
    At least one symbol of the lead code of the detection PPDU is partly or completely replicated in time domain or frequency domain; the intersymbol protection interval of some or all of the detection PPDU is greater than the first preset value; the modulation coding scheme MCS of at least one symbol of the detection PPDU meets a certain preset condition and the Fourier of at least one symbol of the detection PPDU changes order higher than the second preset value.
  27. The network equipment as described in any one of claim 24 to 26, which is characterized in that the channel information includes the delay between the extended delays and/or multi-user of channel；
    2nd PPDU measures the delay between the extended delays and/or multi-user of channel for the destination network device using the 2nd PPDU, and according to the extended delays and/or multi-user for measuring obtained channel Between delay carry out protection interval adaptive adjustment.
  28. The network equipment as described in any one of claim 24 to 26, which is characterized in that the channel information includes the SNR of channel；
    2nd PPDU measures the SNR of channel for the destination network device using the 2nd PPDU, and the SNR of the channel obtained according to measurement carries out the adaptive adjustment of MCS.
  29. A kind of network equipment characterized by comprising
    Generation unit, for generating PPDU；Wherein, the PPDU indicates the network equipment active transmission channel information measurement as a result, the PPDU further includes mode indication field, and the mode indication field is used to indicate the mode of detection PPDU used in the network equipment measurement channel information；
    Transmission unit, for sending the PPDU to destination network device, wherein, the PPDU determines target channel information measurement result according to the mode indication field for the destination network device, and carries out link circuit self-adapting adjustment according to the target channel information measurement result.
  30. The network equipment as claimed in claim 29; it is characterized in that, the mode of detection PPDU includes the bandwidth information of detection PPDU, detects PPDU using at least one of indoor mode or outdoor mode, Fourier's variation order information of the long training field of detection PPDU and the protection interval information for detecting PPDU.
  31. The network equipment as described in claim 29 or 30, which is characterized in that the channel information includes the delay between the extended delays and/or multi-user of channel；
    The PPDU determines target channel information measurement result according to the mode indication field for the destination network device, and the adaptive adjustment of protection interval is carried out according to the target channel information measurement result.
  32. The network equipment as described in claim 29 or 30, which is characterized in that the channel information includes the Signal to Noise Ratio (SNR) of channel；
    The PPDU determines target channel information measurement result according to the mode indication field for the destination network device, and the adaptive adjustment of MCS is carried out according to the target channel information measurement result.
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