CN109756256A

CN109756256A - A kind of method and apparatus of channel detection

Info

Publication number: CN109756256A
Application number: CN201711068596.9A
Authority: CN
Inventors: 梁丹丹; 淦明; 左鑫; 于健; 杨讯
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-11-03
Filing date: 2017-11-03
Publication date: 2019-05-14
Anticipated expiration: 2037-11-03
Also published as: CN114124182A; CN109756256B

Abstract

This application involves the channel sounding techniques in wireless communication field more particularly to wireless communication system.In a kind of full-duplex channel detection method, access point AP (Access Point) generates channel detection information, wherein, channel detection information includes at least: the identification information of the first site STA (Station) and the link state of the first STA, and the 2nd STA identification information and the 2nd STA link state；Wherein, the link state of the first STA is that uplink sends state, and the link state of the 2nd STA is downlink receiving state；AP sends channel detection information；STA determines itself corresponding link state according to channel detection information；Further, AP and know that the STA of itself link state carries out the detection of full-duplex channel and mutual interference channel respectively.By scheme provided by the present application, the detection of full-duplex channel is realized, in order to carry out self-interference and the mutually elimination interfered, be conducive to the handling capacity and efficiency of transmission of lifting system.

Description

A kind of method and apparatus of channel detection

Technical field

This application involves wireless communication fields, more particularly to the channel sounding techniques in wireless communication system.

Background technique

In recent years, rare due to the exponential increase of wireless device and radio spectrum resources, academia and industry are all Finding the method for improving wireless frequency spectrum utilization efficiency.Full duplex (Full Duplex, abbreviation FD) wireless communication technique can make The user of uplink and downlink difference transmission direction is transmitted simultaneously on identical wireless channel, theoretically than half-duplex (Half Duplex, abbreviation HD) availability of frequency spectrum that doubles of mode (such as mode of frequency division duplexing, TDD mode), thus entirely Duplex technology is one of the potential technology of next-generation WiFi.Due to receiving and dispatching simultaneously with frequency, realize that the difficult point of full duplex technology is certainly Interference cancellation techniques.

In WLAN (Wireless Local Access Network, abbreviation WLAN) full duplex MIMO (Multiple Input Multiple Output, abbreviation MIMO) in system, access point AP (Access Point, abbreviation AP) and/or website STA (Station, abbreviation STA) needs to know channel state information CSI (Channel State Information, abbreviation CSI), for carrying out self-interference and/or mutually interference elimination.There has been no the channel spies of full duplex mimo system in wlan system at present Survey (Sounding) protocol scheme.

Summary of the invention

To solve the above-mentioned problems, the application provides a kind of method and apparatus of channel detection, to realize full-duplex channel Detection, be convenient for interference and eliminate, lifting system performance and efficiency.

In a first aspect, the embodiment of the present application provides a kind of method of channel detection, which comprises access point AP (Access Point) generates channel detection information, wherein channel detection information includes at least: the first site STA (Station) Identification information and the first STA link state, and, the identification information of the second site STA (Station) and the 2nd STA's Link state；Wherein, the link state of the first STA is that uplink sends state, and the link state of the 2nd STA is downlink reception shape State；The AP sends the channel detection information.After STA receives the channel detection information sent by AP, according to channel detection Information determines it itself is the first STA perhaps the 2nd STA and determining first STA or the 2nd corresponding link state of STA.Into One step, AP carries out channel detection with the STA of itself link state is known, specifically after sending channel detection information respectively It include: that AP sends channel detection frame, for detecting the channel state information of down channel between AP and the 2nd STA, the first STA hair Channels detect frame, for detecting the channel state information of up channel between the first STA and AP；Respectively, the 2nd STA is to AP Feedback reports that AP includes uplink channel status information to the first STA feedback comprising the beam forming of downlink channel condition information Beam forming report.

Second aspect, the embodiment of the present application provide the method for another channel detection, it is contemplated that uplink sends state The situation that presence between STA and the STA of downlink receiving state is mutually interfered, the method includes when uplink sends the STA of state When there is mutually interference between the STA of downlink receiving state, channel detection information is being sent in AP, and is knowing itself link state STA carry out channel detection respectively after, AP to uplink send state the first STA send transmission opportunity shift frame, will transmit Chance TXOP (Transmit Opportunity) is transferred to the first STA, in order to which the first STA is after transmission opportunity, to downlink 2nd STA of reception state sends trigger frame, for asking for the channel state information of mutual interference channel between the two；Downlink connects The beam forming report of channel state information comprising mutual interference channel is fed back to the first STA by the 2nd STA of receipts state.

The third aspect, the embodiment of the present application provide a kind of device of channel detection, and described device includes: processing unit, Transmission unit and receiving unit.Processing unit, for generating channel detection information, wherein channel detection information includes at least: the The link state of the identification information of one site STA and the first STA, and, the identification information of the 2nd STA and the link of the 2nd STA State；Wherein, the link state of the first STA is that uplink sends state, and the link state of the 2nd STA is downlink receiving state；Hair Unit is sent, for sending channel detection information.Further, after sending channel detection information, transmission unit is also used to send Channel detection frame, the channel detection frame for detecting down channel between AP and the 2nd STA of downlink receiving state, be also used to The first STA feedback that uplink sends state is reported comprising the beam forming of uplink channel status information；Receiving unit, for receiving The channel state information of the down channel of 2nd STA feedback；The STA's and downlink receiving state for considering uplink transmission state In the case of mutual interference between STA, the transmission unit is also used to send transmission opportunity transfer frame to the first STA, will transmit Chance TXOP (Transmit Opportunity) is transferred to the first STA, in order to which the first STA is after obtaining transmission opportunity, obtains Take the channel state information of mutual interference channel between the first STA and the 2nd STA.

Fourth aspect, the embodiment of the present application provide a kind of device of channel detection, and described device includes: receiving unit, Processing unit and transmission unit.Receiving unit, for receiving the channel detection information sent by access point AP, channel detection information It includes at least: the link state of the identification information of the first site STA and the first STA, and, the identification information of the 2nd STA With the link state of the 2nd STA；Wherein, the link state of the first STA is that uplink sends state, the link shape of the 2nd STA State is downlink receiving state；Processing unit, for determining it itself is the first STA or the 2nd STA according to channel detection information, And determine the first STA or the 2nd corresponding link state of STA.When STA is two STA of downlink receiving state, receive Unit is also used to receive the channel detection frame of AP transmission, for detecting the down channel between AP and the 2nd STA, transmission unit It is also used to feed back the beam forming report of the channel state information comprising down channel to AP.When STA is that uplink sends state When one STA, transmission unit is also used at least send channel detection frame to AP, at least for detecting between the first STA and AP Up channel；Receiving unit is also used to receive the beam forming report including uplink channel status information by AP feedback.It is examining In the case of considering the mutual interference that uplink is sent between the first STA of state and the 2nd STA of downlink receiving state, when STA is upper When one STA of row transmission state, receiving unit, which is also used to receive, shifts frame by the transmission opportunity that AP is sent, and transmission unit is also used Bis- STA of Yu Xiang sends the trigger frame for asking for the channel state information of mutual interference channel, and receiving unit is also used to receive packet The beam forming of channel state information containing mutual interference channel is reported.

Another aspect, this application provides a kind of computer readable storage medium, in the computer readable storage medium It is stored with instruction, when run on a computer, so that computer executes method described in above-mentioned various aspects.

Another aspect, this application provides a kind of computer program products comprising instruction, when it runs on computers When, so that computer executes method described in above-mentioned various aspects.

Another aspect, this application provides a kind of chip systems, which includes processor, for supporting data to send out It send equipment to realize function involved in above-mentioned aspect, such as generates or handle data and/or letter involved in the above method Breath.In a kind of possible design, the chip system further includes memory, the memory, is set for saving data transmission Standby necessary program instruction and data.The chip system can be made of chip, also may include chip and other discrete devices.

As it can be seen that technical solution provided by the embodiments of the present application has the benefit that

By method provided by the embodiments of the present application, the link shape of each site STA is indicated in channel detection information The identification information of state and each STA, so that the communication that the website of the website of full-duplex mode and enabling semiduplex mode is constituted System is able to carry out the detection of full duplex uplink and downlink channel, in order to carry out self-interference elimination.Meanwhile the embodiment of the present application is also The case where presence between the website for enabling semiduplex mode is mutually interfered is considered, and mutual interference channel is detected, with It is convenient for the elimination mutually interfered, is conducive to the efficiency of transmission and handling capacity of lifting system.

Detailed description of the invention

In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in the embodiment will be made simply below It introduces.It, without creative efforts, can be with it should be evident that for those of ordinary skills Other attached drawings are obtained according to these attached drawings.

Fig. 1 shows a kind of possible application scenarios schematic diagram of the embodiment of the present application；

Fig. 2 shows a kind of flow diagrams of channel detection method provided by the embodiments of the present application；

Fig. 3 shows a kind of time diagram of channel detection method provided by the embodiments of the present application；

Fig. 4 shows a kind of frame structure schematic diagram of NDPA frame；

Fig. 5 shows the time diagram of another channel detection method provided by the embodiments of the present application；

Fig. 6 shows the time diagram of another channel detection method of the embodiment of the present application proposition；

Fig. 7 shows the time diagram of another channel detection method provided by the embodiments of the present application；

Fig. 8 shows the flow diagram of another channel detection method provided by the embodiments of the present application；

Fig. 9 shows the time diagram of another channel detection method provided by the embodiments of the present application；

Figure 10 shows a kind of structural schematic diagram one of channel detection device provided by the embodiments of the present application；

Figure 11 shows a kind of structural schematic diagram two of channel detection device provided by the embodiments of the present application；

Figure 12 shows a kind of structural schematic diagram three of channel detection device provided by the embodiments of the present application.

Specific embodiment

The scene of the embodiment of the present application description is the technical solution in order to more clearly illustrate the embodiment of the present application, not Constitute the restriction for technical solution provided by the embodiments of the present application.Obviously, described embodiment is only of the invention one Section Example is not whole embodiment, and based on the embodiment in the application, those of ordinary skill in the art are not doing Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.

Refering to fig. 1, a kind of WLAN WLAN (Wireless Local Access Network, abbreviation are shown WLAN) communication system 100.The wireless lan communication system 100 includes an access point AP (Access Point, abbreviation AP) 101, which also includes multiple site STAs (Station, abbreviation STA), which can be The HE STA (High Efficiency Station, abbreviation HE STA) 102,103,104 of 802.11ax can also be tradition Site STA 105,106.It should be understood that the quantity of AP and STA in above-mentioned WLAN communication system 100 are only exemplary , therefore do not constitute the restriction to the embodiment of the present application.

In above-mentioned WLAN 100, access point AP 101 is a kind of device with wireless communication function, can be use The AP that 802.11 agreements carry out data transmission can also be base station, router, gateway, repeater or bridge etc., wherein described Base station may include various forms of macro base stations, micro-base station, relay station etc..

In above-mentioned WLAN 100, conventional station STA be can be using 802.11a/b/g/n/ac/ad/af/ah/aj, or Other conventional communication protocols carry out the website of communication and data transmission, can also be user terminal, user apparatus etc., wherein use Family terminal may include the various handheld devices with wireless communication function, mobile unit, wearable device, calculate equipment or company It is connected to other processing equipments of radio modem, and various forms of user equipmenies (User Equipment, abbreviation UE), mobile station (Mobile station, abbreviation MS), terminal (terminal), terminal device (Terminal Equipment) Etc..

In above-mentioned WLAN communication system 100, AP101 can have full duplex FD (Full Duplex, abbreviation FD) communication Function；Site STA, such as HE STA102 and conventional station STA105, are referred to as STA, can have half-duplex operation function or Person's not enabled full-duplex mode.The AP or STA for enabling full duplex function can carry out uplink simultaneously on identical wireless channel It being transmitted with the data of downlink different directions, the AP or STA for enabling half-duplex function allow the data of uplink and downlink different directions to transmit, But the same time only allows to carry out the data transmission an of transmission direction.Therefore, the AP for enabling full duplex function can be in phase Scheduling at least two enables the STA of half-duplex functions simultaneously on same time and identical frequency resource, and a part of STA is carried out The transmission of row signal, a part of STA carry out the reception of downlink signal.With in above-mentioned WLAN communication system 100, access point AP101, For site STA 102 and STA103, the AP101 of full duplex dispatches STA102 and STA103 simultaneously and carries out bidirectional data transfers, Wherein, STA102 carries out the reception of downlink data or signal, and STA103 carries out the transmission of upstream data or signal.Above-mentioned two-way Before data transmission, AP101 needs to carry out channel detection to full-duplex channel, in order to the uplink and downlink channel obtained using detection Status information eliminates itself down channel to the self-interference of up channel, in order to which full duplex AP dispatches multiple enabling half-duplexs STA carry out bidirectional data transfers, lifting system throughput of transmissions and efficiency with frequency simultaneously.In addition, semiduplex for enabling STA, there are two kinds of situations: one is mutual interference cases are not present between STA102 and STA103, i.e. uplink sends state STA103 does not interfere the STA102 of downlink receiving state or does not consider that uplink sends the STA103 and downlink receiving state of state It is mutually interfered between STA102；Another kind is the presence of the situation mutually interfered between STA102 and STA103.

It will be appreciated by those skilled in the art that, the channel detection method of the embodiment of the present application description both can be adapted for Full-duplex channel between one full duplex AP and multiple AP for enabling semiduplex mode detects, and can be applicable to one complete pair The detection of full-duplex channel between work AP and multiple STA for enabling semiduplex mode, and, a full duplex STA is opened with multiple With the detection of full-duplex channel between the AP of semiduplex mode, a full duplex STA and multiple STA for enabling semiduplex modes it Between full-duplex channel detection, etc..In subsequent explanation, the embodiment of the present application chooses full duplex AP and enables half-duplex mould Convenience of the full-duplex channel detection as description, does not constitute the restriction to inventive embodiments between the STA of formula.

The channel detection method of the embodiment of the present application description, is not only applicable to the situation of full-duplex channel detection, may be used also For carrying out the situation of up channel and down channel detection respectively, it is complete can be applicable to relaying in non-full-duplex channel In duplexing mimo system.

Below by based on it is above-mentioned this application involves general character in terms of, to the embodiment of the present application be further described.

The embodiment of the present application provides a kind of method of channel detection, and the device based on this method.In conjunction with attached drawing 1, institute The method of stating includes: that access point AP (Access Point) generates channel detection information, wherein channel detection information includes at least: The identification information of first site STA (Station) and the link state of the first STA, and, the second site STA (Station) The link state of identification information and the 2nd STA；Wherein, the link state of the first STA is that uplink sends state, the chain of the 2nd STA Line state is downlink receiving state；AP sends channel detection information.STA determines STA certainly according to the channel detection information received The link state of body.Further, AP is after sending channel detection information, i.e., with know the STA of itself link state respectively into Row: the detection of down channel between AP and the 2nd STA of downlink receiving state, and, AP and uplink send state the first STA it Between up channel detection.

On the other hand, the presence of channel between the first STA of state and the 2nd STA of downlink receiving state is sent when uplink Mutually when interference, transmission opportunity is transferred to the first STA that uplink sends state by AP, in order to which the first STA is obtaining transmission opportunity Afterwards, the mutual interference channel carried out between the first STA and the 2nd STA is detected, and the channel state information of mutual interference channel is obtained.

By method provided by the embodiments of the present application, the link-state information and mark of STA are indicated in channel detection information Know information, realize full-duplex channel detection, in order to which full duplex website is after knowing full-duplex channel status information, carries out certainly Interference is eliminated, and lifting system efficiency of transmission and handling capacity are conducive to.Meanwhile the embodiment of the present application also contemplates semiduplex mode The case where presence between website is mutually interfered, and mutual interference channel is detected, in order to the elimination mutually interfered.

In the one aspect of the application, do not consider that uplink sends the first STA of state and the 2nd STA of downlink receiving state Between mutual interference, or, assume the first STA and the 2nd STA between there is no mutually interference.

Attached Fig. 2 shows a kind of flow diagrams of channel detection method provided by the embodiments of the present application, with reference to the accompanying drawing 2, scheme provided by the embodiments of the present application is illustrated.

AP in Fig. 2 can be the AP101 in above-mentioned WLAN100 system shown in FIG. 1, have the function of full duplex, first STA and the 2nd STA can be the HE STA in above-mentioned Fig. 1 WLAN100 system, can also be tradition STA, or be next-generation tool There is full duplex function, but only opens the STA of semiduplex mode.It is illustrated in conjunction with attached drawing 2 and attached drawing 3, this method specific steps Include:

S201: access point AP (Access Point) generates channel detection information, wherein channel detection information is at least wrapped Contain: the identification information of the first site STA (Station) and the link state of the first STA, and, the second site STA (Station) link state of identification information and the 2nd STA；Wherein, the link state of the first STA is that uplink sends state, The link state of 2nd STA is downlink receiving state；The AP sends the channel detection information.

As shown in figure 3, AP sends channel detection information 301 to multiple STA, wherein channel detection information 301 is carried each The identification information 301.1 of a site STA (Station) and the link state 301.2 of each STA, and include at least two A STA is respectively at different link states, which is that uplink sends state or downlink receiving state.Identification information 301.1 can be address MAC (Medium Access Control, abbreviation MAC) of each site STA, can also be STA Associated identifiers (Association Identifier, abbreviation AID) or other identifier, identification information 301.1 is for identifying Need to carry out the STA of channel detection.It should be understood that AP can carry out the practical feelings of downlink and uplink transmission according to their needs Condition determines the STA for needing to carry out upstream or downstream channel detection；It can also be by needing to carry out the STA master of uplink and downlink transmission Trend AP sends request, in order to the identification information and link state of the determining STA for needing to carry out channel detection of AP；It can also lead to Both sides are crossed to negotiate to determine the identification information for the STA for needing to carry out channel detection and link state or other modes, the application Embodiment herein and is not especially limited.

The channel detection information 301 can state NDPA (Null Data Packet by empty data packet Announcement, abbreviation NDPA) frame carrying, wherein NDPA is included at least: the identification information of the first site STA (Station) With the link state of the first STA, and, the identification information of the second site STA (Station) and the link state of the 2nd STA；Its In, the link state of the first STA is that uplink sends state, and the link state of the 2nd STA is downlink receiving state.

In one example, by taking the identification information of STA is associated identifiers AID as an example, include link-state information The frame structure of NDPA frame 400 can be as shown in Figure 4, wherein two STA is included at least in NDPA frame, therefore, in NDPA frame 400 RA field 403 be broadcast address, TA field 404 be transmission NDPA frame transmitting terminal MAC Address.Comprising more in NDPA frame The information of a STA includes multiple STA Info fields, the link state (Link Status Info) of each STA can position In the corresponding STA Info field of the STA.Such as shown in Fig. 4, for STA1, link state 408 is located at STA Info1 word First bit of section 406.1.For example, for STA1, when 408 bit value of Link Status Info is 0 When, it can indicate that the corresponding STA1 of STA Info1 field 406.1 is the link state that uplink is sent；Correspondingly, working as Link When 408 bit value of Status Info is 1, it can indicate that the corresponding STA1 of the STA Info1 field 406.1 connects for downlink The link state of receipts, it is obvious that link state indicated by 0 and 1 is can to exchange.It should be understood that above-mentioned link state letter Ceasing locating bit position in STA Info field is optionally, for example, link-state information may be located on STA Info The last one bit of field, therefore, the present embodiment does not limit specifically.

In another optional example, the link state of each STA can also be indicated by the way of agreement.With For two STA, AP and above-mentioned two STA arrange, multiple STA Info fields of NDPA frame, the STA for the position that ranks first STA corresponding to Info1 field 406.1 is the STA that uplink sends state, 406.2 institute of STA Info2 field being at the second place Corresponding STA is the STA of downlink receiving state, it is possible to understand that, link state corresponding to the sequence of STA Info field is It can exchange.It will be appreciated by those skilled in the art that, it can also be indicated multiple (big according to the sequence of STA Info field In two) link state of STA, for example, 4 STA, wherein 2 STA are that uplink sends state, 2 STA are downlink reception shape State, STA Info1 STA corresponding with STA Info3 are that uplink sends state, the corresponding STA of STA Info2 and STA Info4 For downlink receiving state；In another example 5 STA, wherein 3 STA are that uplink sends state, 2 STA are downlink receiving state, STA Info1 and STA Info3, the corresponding STA of STA Info5 are that uplink sends state, STA Info2 and STA Info4 couple The STA answered is downlink receiving state.

It should be understood that the NDPA frame is either VHT NDPA (Very High Throught, abbreviation VHT) frame, goes back It can be HE NDPA (High Efficiency, abbreviation HE) frame.

After STA receives the channel detection information 301 of AP transmission, according to the link state in channel detection information 301 301.1 and identification information of station 301.2, confirming that itself link state is specifically is that uplink sends state or downlink reception shape State, so as to the subsequent progress full-duplex channel detection of AP.

S202: it carries out respectively: the detection of up channel between the first STA and AP, and, downlink between AP and the 2nd STA The detection of channel, the first STA are that uplink sends state, and the 2nd STA is downlink receiving state.

In one optional example, such as shown in Fig. 3, SIFS (Short Inter-frame Space, abbreviation SIFS) is Short interFrameGap.After AP sends channel detection information 301, AP first to the 2nd STA of downlink receiving state, sends channel and visits Survey frame 302；Then, uplink sends the first STA of state, sends channel detection frame 303 to AP；Wherein, channel detection frame 302 is used Down channel between detection AP and the 2nd STA, channel detection frame 303 is for detecting between the first STA and the AP Row channel.According to above-mentioned channel detection frame 302, the 2nd STA estimates the channel status letter of down channel between AP and the 2nd STA Breath, according to above-mentioned channel detection frame 303, AP estimates the channel state information of up channel between the first STA and AP.Later, Two STA send beam forming report 304 to AP, wherein beam forming reports BF Report (Beamforming Report, letter Claim BF Report) 304 channel state information CSI (the Channel State comprising down channel between the 2nd STA and AP Information, abbreviation CSI)；AP sends beam forming report 305 to the first STA, wherein beam forming reports that 305 include The channel state information of up channel between first STA and AP.

It should be understood that in another optional example, the process of above-mentioned channel detection can also be according to: channel detection Information 301, channel detection frame 302, beam forming report 304, channel detection frame 303, the sequence of beam forming report 305 is successively It carries out.

It should be understood that AP can also send trigger frame 306 to the 2nd STA before feedback beam forming report 304, The trigger frame 306 is used to ask for the channel state information of down channel between AP and the 2nd STA to the 2nd STA, and the 2nd STA is received 306 after to trigger frame, then feed back to AP the channel state information of itself down channel between AP；Accordingly, it is to be understood that, touching It is optional for sending out frame 306.

In another optional example, as shown in figure 5, AP send channel detection information 501 after, can also first by First STA to AP send channel detection frame 502, then from AP to the 2nd STA send channel detection frame 503, channel detection frame 502 with The function that aforementioned channels detect frame 303 is identical, the function phase of the function of channel detection frame 503 and channel detection frame 302 above-mentioned Together.Likewise, according to channel detection frame 502 and 303, after being respectively completed the estimation of above-mentioned uplink and downlink channel, AP is to first STA sends beam forming report 504, and the 2nd STA is fed back to AP again carries AP beam forming report 505, wherein channel detection letter Breath 501 is identical as aforementioned channels detection information 201, also includes identification information 501.1 and link state 501.2, beam forming report Accuse 504, the function of beam forming report 505 and aforementioned beam forming report 304 identical as the function of aforementioned beam forming report 305 It can be identical.

It should be understood that the process of above-mentioned channel detection can also be according to: channel detection information 501, channel detection frame 502, the sequence of beam forming report 504, channel detection frame 503, beam forming report 505 successively carries out.

Likewise, AP can also send trigger frame 506, for asking for channel shape before feedback beam forming report 504 State information.

It should be understood that above-mentioned channel detection frame 302,303,502,503 can be sky data packet NDP (Null Data Packet, abbreviation NDP), it can also be the PPDU with the head Staggered (Staggered Preamble), i.e., Staggered PPDU (Physical Layer Protocol Data Unit, abbreviation PPDU) or other with channel detection The frame of function.

In the present embodiment, by channel detection information indicate need to carry out channel detection multiple STA mark Link-state information corresponding with its allows full duplex AP to dispatch multiple STA for enabling semiduplex mode and carries out respectively Full-duplex channel detection is realized in the detection of row channel and down channel；And compared with prior art, the present embodiment is by once referring to Show, the detection of full-duplex channel can be completed, improves the efficiency of full-duplex channel detection.

Fig. 6 is the flow diagram of another channel detection method provided by the embodiments of the present application.It is right below with reference to Fig. 6 Scheme provided by the embodiments of the present application is illustrated.

Access point AP sends channel detection information 601 to multiple site STAs, and channel detection information 601 includes: each The identification information 601.1 of STA and the link state 601.2 of each STA, link state are that uplink sends state or downlink reception State；Wherein, different link states is respectively at including at least two STA.

Above-mentioned channel detection information 601 is identical as aforementioned channels detection information 301, and details are not described herein.

Uplink sends STA, i.e. the first STA of state, sends channel detection frame 602, the function of channel detection frame 602 to AP Frame 502 is detected with aforementioned channels and aforementioned channels detect the identical of frame 303, and details are not described herein.

Unlike method described in Fig. 5 and Fig. 3, AP is according to the channel detection frame for receiving the first STA transmission in Fig. 6 602, it estimates between the first STA and AP after the channel state information of up channel, while being sent out to the first STA and the 2nd STA It delivers newspaper and accuses frame 603, wherein report frame 603 is also used to both for detecting the down channel between AP and the 2nd STA to the first STA Feed back the channel state information of up channel between the first STA and AP.

It will be appreciated by those skilled in the art that, this report frame can be Staggered PPDU, wherein Staggered PPDU frame contains one for carrying out additional HT-LTFs field (the High Throughput Long of channel detection Training field, abbreviation HT-LTFs), and carried between the first STA and AP in the data field of Staggered PPDU The channel state information of row channel.

After 2nd STA receives the report frame 603 of AP transmission, AP and downlink between itself are estimated according to report frame 603 The channel state information of channel, and to AP feedback beam forming report 604, report that 505 functions are identical with aforementioned beam forming, together Sample, trigger frame 605 is similar to aforementioned 306 function of trigger frame, and optional.

The present embodiment to the first STA fed-back channel status by believing after the first STA sends channel detection frame 602 While breath, the detection of down channel between AP and the 2nd STA has also been carried out, compared with prior art, has improved full duplex letter The efficiency of road detection.

Embodiment unlike the embodiments above, being further illustrated below considers that uplink sends the STA of state under There is mutually interference between the STA of row reception state, needs to carry out mutual interference channel the situation of channel estimation.

Fig. 7 is the time diagram of another channel detection method provided by the embodiments of the present application, and this method specifically includes:

Access point AP sends channel detection information 701 to multiple site STAs, wherein channel detection information includes: each The identification information 701.1 of STA and the link state 701.2 of each STA, are respectively different links including at least two STA State, the link state are that uplink sends state and downlink receiving state.Above-mentioned channel detection information 701 and abovementioned steps S201 Middle channel detection information 301 is identical, and details are not described herein again.

STA determines it itself is the first STA or the 2nd STA according to channel detection information 701, and determine the first STA or The 2nd corresponding link state of STA of person.First STA knows that the link state of itself is that uplink sends state, and the 2nd STA is known certainly The link state of body is downlink receiving state.

AP sends channel detection frame 702 to the 2nd STA, wherein the function of channel detection frame 702 and the letter in earlier figures 3 The function that road detects frame 302 is identical, and details are not described herein.

Unlike method corresponding in earlier figures 3, after the first STA receives channel detection information 701, according to letter Road detection information 701 obtains the identification information of the STA (i.e. the 2nd STA) of downlink receiving state；First STA simultaneously to AP and 2nd STA sends channel detection frame 703, and the channel detection frame 703 is both for detecting the letter of up channel between the first STA and AP Road detects frame, is also used to detect the mutual interference channel between the first STA and the 2nd STA.

In one optional example, the STA of state can be sent comprising being used to indicate uplink in channel detection information 701 The label of channel detection frame is sent to the STA of AP and downlink receiving state simultaneously.For example, NDPA frame Frame can be chosen 4 kinds of the reserved bit position composition of Subtype field combine in (0000,0001,0010,0011) in Control field one Kind, it marks the NDPA frame as a kind of special NDPA frame, realizes that the STA of instruction uplink transmission state connects to AP and downlink simultaneously The STA of receipts state sends the function of channel detection frame.After the STA that uplink sends state receives such special NDPA frame, Channel detection frame 703 is sent simultaneously to AP and the 2nd STA simultaneously.

In another optional example, uplink can also be arranged according to link state and send the STA of state simultaneously to AP Channel detection frame is sent with the STA of downlink receiving state.For example, STA works as determination according to the channel detection information 701 received When itself corresponding link state is that uplink sends state, STA obtains link state according to channel detection information 701 and connects for downlink The identification information of the STA of receipts state, and channel detection frame is sent to the STA of AP and downlink receiving state simultaneously, both for detecting Uplink sends the up channel between the STA and AP of state, is also used to detect STA and downlink receiving state that uplink sends state STA between mutual interference channel；And when it is downlink receiving state that STA, which determines itself, then it does not need to send state to uplink STA send channel detection frame.

2nd STA according to the channel detection frame 702 that receives and channel detection frame 703, estimate respectively AP and itself between The channel state information of down channel, and, the channel state information of itself mutual interference channel between the first STA.2nd STA will The channel state information of the channel state information of above-mentioned down channel and mutual interference channel is entrained into beam forming report 704, Feed back to AP.

AP estimates the channel status letter of down channel between AP and the first STA according to the channel detection frame 703 received Breath, and according to beam forming report 704 is received, not only know the channel status of itself down channel between the 2nd STA Information is also known the channel state information of mutual interference channel between the 2nd STA and the first STA.Then, AP is by itself and first The channel state information of up channel between STA, and, the channel state information of mutual interference channel between the first STA and the 2nd STA It is entrained into beam forming report 705, feeds back to the first STA.

First STA had both known the channel status letter of itself down channel between AP according to beam forming report 705 Breath, and known the channel state information of itself mutual interference channel between the 2nd STA.

It according to the method for the present embodiment, realizes between website when there is mutually interference, the detection of full-duplex channel and mutually dry The channel detection of channel is disturbed, is eliminated in order to mutually interfere with self-interference, lifting system performance.

As shown in figure 8, being the flow diagram of another channel detection method provided by the embodiments of the present application, Fig. 9 is shown The embodiment of the present application scheme corresponding time diagram, below with reference to Fig. 8 and Fig. 9, the side that the embodiment of the present invention is provided Case is illustrated.

S801: access point AP (Access Point) sends channel detection information 901, wherein channel detection information is at least Include: the identification information of the first site STA (Station) and the link state of the first STA, and, the second site STA (Station) link state of identification information and the 2nd STA；Wherein, the link state of the first STA is that uplink sends state, The link state of 2nd STA is downlink receiving state.

Above-mentioned channel detection information 901 is identical as aforementioned channels detection information 301, and details are not described herein.

S802: it carries out respectively: the detection of up channel between the first STA and AP, and, downlink between AP and the 2nd STA The detection of channel, the first STA are that uplink sends state, and the 2nd STA is downlink receiving state.

Step S802 can be using the detection method in abovementioned steps S202, can also be using corresponding spy in earlier figures 6 Survey method, details are not described herein.

S803:AP sends transmission opportunity to the first STA and shifts frame, and transmission opportunity transfer frame is for shifting transmission opportunity The first STA and second is obtained to the first STA in order to which the first STA sends trigger frame to the second STA after obtaining transmission opportunity The channel state information of mutual interference channel between STA.

In one example, as shown in figure 9, after the transmission opportunity transfer frame 906 that the first STA reception AP is sent, first STA is obtained transmission opportunity TXOP (Transmit Opportunity, abbreviation TXOP), and the first STA sends to the 2nd STA touch again Frame 907 is sent out, for asking for the channel state information of mutual interference channel between the first STA and the 2nd STA to the 2nd STA, wherein should It include the identification information of the 2nd STA in trigger frame 907；After 2nd STA receives trigger frame 907, the 2nd STA is to the first STA Feed back beam forming report 908, wherein beam forming report 908 includes mutual interference channel between the first STA and the 2nd STA Channel state information.

It should be understood that the first STA needs to know the mark letter of the 2nd STA before the first STA sends trigger frame 907 Breath, the identification information ask for the channel state information of mutual interference channel convenient for the first STA to the 2nd STA.

In one example, the first STA obtains the identification information of the 2nd STA according to channel detection information 901.For example, Empty packet states in NDPA frame that the identification information can be the MAC Address of the 2nd STA, associated identifiers AID or other marks Know information.By taking associated identifiers AID as an example, as shown in figure 4, the AID in NDPA frame in STA Info field comprising STA believes Breath.For example, STA Info2 field 406.2 is the information of the 2nd STA in such as Fig. 4, the first STA is receiving NDPA frame Afterwards, the identification information of the 2nd STA can be obtained from the STA Info2 field 406.2 in NDPA frame.

In another example, it fails in the first STA and parses the mark of the 2nd STA in channel detection information 901 Information, alternatively, after the first STA success obtains the 2nd STA identification information in channel detection information 901, it is uncached mutual to initiating In the case that interference channel status information is asked for, the transmission opportunity that can also be sent according to AP to the first STA shifts frame 906 to obtain Take the identification information of the 2nd STA.For example, can be shifted in transmission opportunity so that the identification information of the 2nd STA is MAC Address as an example Reversed permission field (Reserve Direction Grant, abbreviation RDG) in frame indicates the MAC Address of the 2nd STA.

It should be understood that in addition to the above two method for informing the 2nd STA identification information, it can also be by sending additionally Frame or information inform the identification information of the 2nd STA to the first STA, are not limited thereto.

Through the above scheme, the detection of full-duplex channel and mutually interference when there is mutually interference are equally realized between website The channel detection of channel is eliminated in order to mutually interfere with self-interference, lifting system performance.

Figure 10 shows the possible structural schematic diagram of a kind of channel detection device 1000 in above-described embodiment, the device 1000 It can be the AP101 in aforementioned wlan system 100, can also be the STA with full duplex function.The device 1000 includes locating Manage unit 1001, transmission unit 1002 and receiving unit 1003.

Processing unit 1001, for generating channel detection information, wherein channel detection information includes at least: the first website The identification information of STA (Station) and the link state of the first STA, and, the identification information of the second site STA (Station) With the link state of the 2nd STA；Wherein, the link state of the first STA is that uplink sends state, and the link state of the 2nd STA is Downlink receiving state；

Transmission unit 1002, for sending channel detection information.

Receiving unit 1003, for receiving the first channel detection frame sent by the first STA, the first channel detection frame is used for Detect the up channel between the first STA and AP；

Transmission unit 1002 is also used to send report frame to the first STA and the 2nd STA simultaneously, and report frame is used for first STA feeds back the channel state information of up channel between the first STA and AP, is also used to detect the downlink between AP and the 2nd STA Channel；

Receiving unit 1003 is also used to receive the first beam forming report by the 2nd STA feedback, the first beam forming report Accuse the channel state information comprising down channel between AP and the 2nd STA.

Transmission unit 1002 is also used to send second channel detection frame to the 2nd STA, and second channel detection frame is for detecting Down channel between AP and the 2nd STA；

Receiving unit 1003, is also used to receive the third channel detection frame sent by the first STA, and third channel detection frame is used In detecting the up channel between the first STA and AP, it is also used to detect the mutual interference channel between the first STA and the 2nd STA；

Receiving unit 1003 is also used to receive the second beam forming report by the 2nd STA feedback, the second beam forming report The channel state information comprising down channel between AP and the 2nd STA is accused, also comprising mutually interfering between the first STA and the 2nd STA The channel state information of channel；

Transmission unit 1002, is also used to send the report of third beam forming to the first STA, and the report of third beam forming includes The channel state information of up channel between first STA and AP, also comprising mutual interference channel between the first STA and the 2nd STA Channel state information.

Transmission unit 1002 is also used to send transmission opportunity transfer frame to the first STA, and transmission opportunity transfer frame will be for that will pass Defeated chance is transferred to the first STA, sends trigger frame to the second STA after obtaining transmission opportunity in order to the first STA, obtains first The channel state information of mutual interference channel between STA and the 2nd STA.

It should be understood that the above-mentioned working principle for channel detection device 1000 can be with reference to Fig. 2, its is right by Fig. 3, Fig. 5-Fig. 9 The method explanation answered, has any function possessed by channel detection device 1000 in above method embodiment, no longer superfluous herein It states.

Figure 11 shows a kind of possible structural schematic diagram of channel detection device in above-described embodiment, which can To be the AP101 for only opening semiduplex mode in aforementioned wlan system 100, HE STA, or tradition STA can also be, or It is that the next generation has the function of full duplex, only opens the STA of semiduplex mode.The device 1100 includes receiving unit 1101, processing Unit 1102 and transmission unit 1103.

Receiving unit 1101, for receiving the channel detection information sent by access point AP, channel detection information is at least wrapped Contain: the link state of the identification information of the first site STA and the first STA, and, the identification information of the second site STA and second The link state of STA；

Wherein, the link state of the first STA is that uplink sends state, and the link state of the 2nd STA is downlink receiving state；

Processing unit 1102 determines it itself is the first STA or the 2nd STA for according to channel detection information, and really Fixed first STA or the 2nd corresponding link state of STA；

When STA determines itself STA for uplink transmission state according to channel detection information,

Transmission unit 1103, for sending the first channel detection frame to AP, the first channel detection frame is for detecting the first STA Up channel between AP；

Receiving unit 1101, is also used to receive the report frame sent by AP, and report frame is used for the first STA feedback described the The channel state information of up channel between one STA and AP is also used to detect between AP and the 2nd STA of downlink receiving state Down channel；

When STA according to channel detection information determine itself be downlink receiving state two STA when,

Receiving unit 1101, for receiving the report frame sent by AP, report frame sends the of state for feeding back uplink The channel state information of up channel between one STA and AP, is also used to detect the down channel between AP and the 2nd STA；

Transmission unit 1103, be also used to AP send the first beam forming report, the first beam forming report comprising AP with The channel state information of down channel between 2nd STA；

Receiving unit 1101 is also used to receive the second channel detection frame sent by AP, and second channel detection frame is for visiting Survey the down channel between AP and the 2nd STA；

Receiving unit 1101 is also used to receive the third channel detection frame sent by the first STA that uplink sends state, the Three channel detection frames are used to detect the up channel between the first STA and AP, are also used to detect between the 2nd STA and the first STA Mutual interference channel；

Transmission unit 1103, for sending the report of the second beam forming to AP, the report of the second beam forming includes AP and the The channel state information of down channel between two STA, also the channel shape comprising mutual interference channel between the 2nd STA and the first STA State information；

Transmission unit 1103, for sending third channel detection frame to the 2nd STA of AP and downlink receiving state simultaneously, the Three channel detection frames are used to detect the up channel between the first STA and AP, are also used to detect between the first STA and the 2nd STA Mutual interference channel；

Receiving unit 1101 is also used to receive the third beam forming report sent by AP, third beam forming report packet Channel state information containing down channel between AP and the 2nd STA of downlink receiving state also includes the first STA and the 2nd STA Between mutual interference channel channel state information.

Receiving unit 1101 is also used to receive and shifts frame by the transmission opportunity that AP is sent, and transmission opportunity transfer frame is used for will Transmission opportunity TXOP (Transmit Opportunity) is transferred to the first STA；

Transmission unit 1103 is also used to send trigger frame to the 2nd STA, and trigger frame is for asking for the first STA and the 2nd STA Between mutually interference channel channel state information；

Receiving unit 1101 is also used to receive the 4th beam forming report by the 2nd STA feedback, the 4th beam forming report Accuse the channel state information comprising mutual interference channel between the first STA and the 2nd STA.

It should be understood that the working principle of the above-mentioned device 1100 for channel detection can with reference to Fig. 2-Fig. 3, Fig. 5-Fig. 9 with And its corresponding method, there is any function possessed by channel detection device 1100 in above method embodiment, herein no longer It repeats.

Figure 12 shows a kind of possible structural schematic diagram of device involved in above-described embodiment, comprising: processor 1202, memory 1203, transceiver 1204, input equipment 1205 and output equipment 1206 are connected with each other by bus 1201.This Application embodiment does not limit the specific connection medium between above-mentioned component.Bus is only schematically illustrated in Figure 12, not Regard it as and is limited.The bus 1201 can be divided into address bus, data/address bus, control bus etc..For convenient for indicating, in Figure 12 only It is indicated with a thick line, it is not intended that an only bus or a type of bus.

Controller/processor 1202 can be general processor, such as general central processor (CPU), network processing unit (Network Processor, abbreviation NP), microprocessor etc., are also possible to application-specific integrated circuit (application- Specific integrated circBIt, abbreviation ASIC), or it is one or more for controlling the execution of application scheme program Integrated circuit.It can also be that digital signal processor (Digital Signal Processor, abbreviation DSP), scene can be compiled Journey gate array (Field-Programmable Gate Array, abbreviation FPGA) or other programmable logic device, discrete gate Or transistor logic, discrete hardware components.Controller/processor is also possible to realize the combination of computing function, such as It is combined comprising one or more microprocessors, DSP and the combination of microprocessor etc..

Processor 1202 can be used for realizing the function of aforementioned processing unit 1001 and aforementioned processing unit 1102.

The program for executing technical scheme is preserved in memory 1203, can also preserve operating system and other Application program.Specifically, program may include program code, and program code includes computer operation instruction.More specifically, it stores Other classes that device 1203 can be read-only memory (read-only memory, abbreviation ROM), can store static information and instruction The static storage device of type, can store information and refer to random access memory (random access memory, abbreviation RAM) Other kinds of dynamic memory, the magnetic disk storage etc. enabled.Memory 1203 can be the combination of above-mentioned storage class.

Transceiver 1204 is to support controlling terminal equipment and other equipment or communication.Transceiver 1204 can be used In the aforementioned transmission unit 1002 of realization, receiving unit 1003, transmission unit 1103, the function of receiving unit 1101.

Processor 1202 executes the program stored in memory 1203, and calls other equipment, can be used for executing figure Each step that embodiment shown in 2, Fig. 3, Fig. 5-Fig. 9 and its corresponding method illustrate.

It is designed it is understood that Figure 12 illustrate only simplifying for controlling terminal equipment.In practical applications, control is whole End equipment may include any number of transmitter, receiver, processor, controller, memory etc., and all this may be implemented The controlling terminal equipment of application is all within the scope of protection of this application.

The step of method in conjunction with described in present disclosure or algorithm can realize in a manner of hardware, can also It is realized in a manner of being to execute software instruction by processor.Software instruction can be made of corresponding software module, software mould Block can be stored on RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, In the storage medium of mobile hard disk, CD-ROM or any other form well known in the art.A kind of illustrative storage medium It is coupled to processor, to enable a processor to from the read information, and information can be written to the storage medium.When So, storage medium is also possible to the component part of processor.Pocessor and storage media can be located in ASIC.In addition, should ASIC can be located in user equipment.Certainly, pocessor and storage media can also be used as discrete assembly and be present in user equipment In.

Those skilled in the art are it will be appreciated that in said one or multiple examples, function described herein It can be realized with hardware, software, firmware or their any combination.No matter in software, firmware, middleware, micro- generation, are referred to as Code, hardware description language or other terms, software should be broadly interpreted as meaning to instruct, instruction set, code, code Section, program code, program, subprogram, software module, application, software application, software package, routine, subroutine, object can be performed File, the thread of execution, process, function etc..When implemented in software, these functions can be stored in computer-readable It instructs in medium or as the one or more on computer-readable medium or code is transmitted.Computer-readable medium packet Computer storage media and communication media is included, wherein communication media includes convenient for transmitting and calculating from a place to another place Any medium of machine program.Storage medium can be any usable medium that general or specialized computer can access.

Above-described specific embodiment has carried out further the purpose of the application, technical scheme and beneficial effects It is described in detail, it should be understood that being not used to limit the application the foregoing is merely the specific embodiment of the application Protection scope, all any modification, equivalent substitution, improvement and etc. on the basis of the technical solution of the application, done should all Including within the scope of protection of this application.

Claims

1. a kind of channel detection method, which is characterized in that the described method includes:

Access point AP (Access Point) generates channel detection information, wherein the channel detection information includes at least: first The link state of the identification information of site STA (Station) and the first STA, and, the second site STA (Station) Identification information and the 2nd STA link state；

Wherein, the link state of the first STA is that uplink sends state, and the link state of the 2nd STA is downlink reception State；

The AP sends the channel detection information.

2. the method according to claim 1, wherein the channel detection information is that Empty packet states NDPA (Null Data Packet Announcement)。

3. method according to claim 1 or 2, which is characterized in that after the AP sends the channel detection information, institute State method further include:

The AP receives the first channel detection frame sent by the first STA, and the first channel detection frame is for detecting institute State the up channel between the first STA and the AP；

The AP sends report frame to the first STA and the 2nd STA simultaneously, and the report frame is used for described first STA feeds back the channel state information of up channel between the first STA and AP, is also used to detect the AP and described the Down channel between two STA；

The AP is received to be reported by the first beam forming that the 2nd STA is fed back, and the first beam forming report includes institute State the channel state information of down channel between AP and the 2nd STA.

4. method according to claim 1 or 2, which is characterized in that after the AP sends the channel detection information, institute State method further include:

The AP sends second channel to the 2nd STA and detects frame, second channel detection frame for detect the AP with Down channel between 2nd STA；

The AP receives the third channel detection frame sent by the first STA, and the third channel detection frame is for detecting institute The up channel between the first STA and the AP is stated, is also used to detect mutual dry between the first STA and the 2nd STA Disturb channel；

The AP is received to be reported by the second beam forming that the 2nd STA is fed back, and the second beam forming report includes institute State the channel state information of down channel between AP and the 2nd STA, also comprising the first STA and the 2nd STA it Between mutually interference channel channel state information；

The AP sends the report of third beam forming to the first STA, and the third beam forming report includes described first The channel state information of up channel between STA and the AP, also comprising mutually being done between the first STA and the 2nd STA Disturb the channel state information of channel.

5. according to the method in any one of claims 1 to 3, which is characterized in that the method also includes:

The AP sends transmission opportunity to the first STA and shifts frame, and the transmission opportunity transfer frame is used for transmission opportunity TXOP (Transmit Opportunity) is transferred to the first STA, in order to which the first STA acquisition transmission opportunity is backward 2nd STA sends trigger frame, obtains the channel status letter of mutually interference channel between the first STA and the 2nd STA Breath.

6. a kind of channel detection method, which is characterized in that the described method includes:

Site STA (Station) receives the channel detection information sent by access point AP (Access Point), and the channel is visited Measurement information includes at least: the link state of the identification information of the first site STA (Station) and the first STA, and, the The link state of the identification information of two site STAs (Station) and the 2nd STA；

The STA determines it itself is the first STA or the 2nd STA according to the channel detection information, and determines First STA or the corresponding link state of the 2nd STA.

7. method according to claim 6, which is characterized in that the channel detection information is Empty packet statement NDPA(Null Data Packet Announcement)。

8. method according to claim 6 or 7, which is characterized in that the STA is determined according to the channel detection information After the link state of itself, the method also includes:

When the STA determines itself STA for uplink transmission state according to the channel detection information,

First STA sends the first channel detection frame to the AP, and the first channel detection frame is for detecting described first Up channel between STA and the AP；

First STA receives the report frame sent by the AP, and the report frame is for feeding back the first STA and the AP Between up channel channel state information, be also used to detect between the AP and the 2nd STA of the downlink receiving state Down channel；

When the STA according to the channel detection information determine itself be downlink receiving state two STA when,

2nd STA receives the report frame sent by the AP, and the report frame is used to feed back the uplink and sends state The channel state information of up channel between first STA and the AP is also used to detect between the AP and the 2nd STA Down channel；

2nd STA sends the report of the first beam forming to the AP, first beam forming report comprising the AP with The channel state information of down channel between 2nd STA.

9. method according to claim 6 or 7, which is characterized in that the method also includes:

2nd STA, which is received, detects frame by the second channel that the AP is sent, and the second channel detection frame is for detecting institute State the down channel between AP and the 2nd STA；

2nd STA receives the third channel detection frame sent by the first STA that the uplink sends state, the third letter Road detection frame is used to detect up channel between the first STA and AP, be also used to detect the 2nd STA with it is described Mutual interference channel between first STA；

2nd STA sends the report of the second beam forming to the AP, second beam forming report comprising the AP with The channel state information of down channel between 2nd STA, also comprising mutually being done between the 2nd STA and the first STA Disturb the channel state information of channel；

First STA sends third channel detection frame to the 2nd STA of the AP and the downlink receiving state simultaneously, described Third channel detection frame is used to detect the up channel between the first STA and AP, is also used to detect the first STA With the mutual interference channel between the 2nd STA；

First STA is received to be reported by the third beam forming that the AP is sent, and the third beam forming report includes institute State the channel state information of down channel between AP and the 2nd STA, also comprising the first STA and the 2nd STA it Between mutual interference channel channel state information.

10. the method according to any one of claim 6 to 8, which is characterized in that the method also includes:

First STA, which is received, shifts frame by the transmission opportunity that the AP is sent, and the transmission opportunity transfer frame will be for that will transmit Chance TXOP (Transmit Opportunity) is transferred to the first STA；

First STA sends trigger frame to the 2nd STA, and the trigger frame is for asking for the first STA and described the The channel state information of mutual interference channel between two STA；

First STA is received to be reported by the 4th beam forming that the 2nd STA is fed back, the 4th beam forming report packet Channel state information containing interference channel mutual between the first STA and the 2nd STA.

11. a kind of channel detection device, which is characterized in that described device includes:

Processing unit (1001), for generating channel detection information, wherein the channel detection information includes at least: first stop The link state of the identification information of point STA (Station) and the first STA, and, the mark of the second site STA (Station) Know the link state of information and the 2nd STA；

Transmission unit (1002), for sending the channel detection information.

12. device according to claim 11, which is characterized in that the channel detection information is Empty packet statement NDPA (Null Data Packet Announcement) frame.

13. device according to claim 11 or 12, which is characterized in that described device further include:

Receiving unit (1003), for receiving the first channel detection frame sent by the first STA, first channel detection Frame is used to detect the up channel between the first STA and AP；

The transmission unit (1002) is also used to send report frame, the report to the first STA and the 2nd STA simultaneously The channel state information that frame is used to feed back up channel between the first STA and AP to the first STA is accused, is also used to Detect the down channel between the AP and the 2nd STA；

The receiving unit (1003) is also used to receive and be reported by the first beam forming of the 2nd STA feedback, and described first Channel state information of the beam forming report comprising down channel between the AP and the 2nd STA.

14. device according to claim 11 or 12, which is characterized in that

The transmission unit (1002) is also used to send second channel detection frame, the second channel detection to the 2nd STA Frame is used to detect the down channel between the AP and the 2nd STA；

Receiving unit (1003), for receiving the third channel detection frame sent by the first STA, the third channel detection Frame is used to detect the up channel between the first STA and AP, is also used to detect the first STA and described second Mutual interference channel between STA；

The receiving unit (1003) is also used to receive and be reported by the second beam forming of the 2nd STA feedback, and described second Channel state information of the beam forming report comprising down channel between the AP and the 2nd STA, also includes described first The channel state information of mutual interference channel between STA and the 2nd STA；

The transmission unit (1002), be also used to the first STA send third beam forming report, the third wave beam at Channel state information of the shape report comprising up channel between the first STA and AP, also includes the first STA and institute State the channel state information of mutual interference channel between the 2nd STA.

15. device described in any one of 1 to 13 according to claim 1, which is characterized in that the transmission unit (1002), also Frame is shifted for sending transmission opportunity to the first STA, the transmission opportunity transfer frame is used for transmission opportunity TXOP (Transmit Opportunity) is transferred to the first STA, in order to Xiang Suoshu after the first STA acquisition transmission opportunity 2nd STA sends trigger frame, obtains the channel state information of mutual interference channel between the first STA and the 2nd STA.

16. a kind of channel detection device, which is characterized in that described device includes:

Receiving unit (1101), for receiving the channel detection information sent by access point AP (Access Point), the letter Road detection information includes at least: the link state of the identification information of the first site STA (Station) and the first STA, with And second site STA (Station) identification information and the 2nd STA link state；

Processing unit (1102), for determining it itself is the first STA or described second according to the channel detection information STA, and determine the first STA or the corresponding link state of the 2nd STA.

17. device according to claim 16, which is characterized in that the channel detection information is Empty packet statement NDPA (Null Data Packet Announcement) frame.

18. device according to claim 16 or 17, which is characterized in that described device further include:

Transmission unit (1103), for sending the first channel detection frame to the AP, the first channel detection frame is for detecting Up channel between the first STA and AP；

The receiving unit (1101), is also used to receive the report frame sent by the AP, and the report frame is used for described the One STA feeds back the channel state information of up channel between the first STA and AP, be also used to detect the AP with it is described Down channel between 2nd STA of downlink receiving state；

The receiving unit (1101), is also used to receive the report frame sent by the AP, and the report frame is described for feeding back Uplink sends the channel state information of up channel between the first STA and the AP of state, is also used to detect the AP and institute State the down channel between the 2nd STA；

Transmission unit (1103), for sending the report of the first beam forming to the AP, the first beam forming report includes The channel state information of down channel between the AP and the 2nd STA.

19. device according to claim 16 or 17, which is characterized in that described device further include:

The receiving unit (1101), is also used to receive the second channel detection frame sent by the AP, and the second channel is visited Frame is surveyed to be used to detect the down channel between the AP and the 2nd STA；

The receiving unit (1101) is also used to receive and be visited by the third channel that the first STA that the uplink sends state is sent Frame is surveyed, the third channel detection frame is used to detect the up channel between the first STA and AP, is also used to detect institute State the mutual interference channel between the 2nd STA and the first STA；

Transmission unit (1103), for sending the report of the second beam forming to the AP, the second beam forming report includes The channel state information of down channel between the AP and the 2nd STA, also comprising the 2nd STA and the first STA Between mutually interference channel channel state information；

Transmission unit (1103) is visited for sending third channel to the 2nd STA of the AP and the downlink receiving state simultaneously Frame is surveyed, the third channel detection frame is used to detect the up channel between the first STA and AP, is also used to detect institute State the mutual interference channel between the first STA and the 2nd STA；

The receiving unit (1101) is also used to receive the third beam forming report sent by the AP, the third wave beam Channel state information of the forming report comprising down channel between the AP and the 2nd STA of the downlink receiving state, is also wrapped Channel state information containing the mutual interference channel between the first STA and the 2nd STA.

20. device described in any one of 6 to 18 according to claim 1, it is characterised in that:

The receiving unit (1101) is also used to receive and shifts frame by the transmission opportunity that the AP is sent, and the transmission opportunity turns Frame is moved to be used to transmission opportunity TXOP (Transmit Opportunity) being transferred to the first STA；

The transmission unit (1103) is also used to send trigger frame to the 2nd STA, and the trigger frame is for asking for described the The channel state information of mutual interference channel between one STA and the 2nd STA；

The receiving unit (1101) is also used to receive and be reported by the 4th beam forming of the 2nd STA feedback, and the described 4th Channel state information of the beam forming report comprising mutual interference channel between the first STA and the 2nd STA.