CN110138421A

CN110138421A - Channel detection method and relevant apparatus

Info

Publication number: CN110138421A
Application number: CN201810128864.XA
Authority: CN
Inventors: 陈特彦; 淦明; 吴涛; 曹粔
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-02-08
Filing date: 2018-02-08
Publication date: 2019-08-16
Anticipated expiration: 2038-02-08
Also published as: WO2019154188A1; CN110138421B

Abstract

The application provides a kind of channel detection method and relevant apparatus, wherein the channel detection method may include: that the first equipment generates physical layer protocol data unit PPDU, and the PPDU includes the data field Jing Guo precoding and the long training field without precoding；First equipment sends the PPDU, at least one second equipment can receive the PPDU, and carry out channel estimation, and then feedback channel information according to the long training field.As it can be seen that the application, which carries out channel detection using the PPDU comprising the long training field without precoding, can reduce the expense of channel detection compared with individually sending zero data message and carrying out channel detection.

Description

Channel detection method and relevant apparatus

Technical field

This application involves fields of communication technology, in particular to channel detection method and relevant apparatus.

Background technique

Gulping down for system can be improved in multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) technology The amount of spitting, for example, the access point of 4 antennas of configuration can be that 3 websites send number in identical channel by MIMO technology simultaneously According to, due between each website can not the downlink data that is respectively received of Combined Treatment, access point is sent to the number of each website According to needing to send after precoding, so that each website receives only respective data.Wherein, access point will obtain each website Pre-coding matrix needs to know the channel information between access point and the receiving antenna of each website, therefore, between AP and each website Need to carry out channel detection (Sounding) process, so that each website carries out channel estimation and feedback channel information.

In the channel detection process, access point can first send a zero data message notifying message, for notifying each website Prepare to receive the zero data message that will be sent, and channel estimation is carried out according to the zero data message；Access point sends zero data Message and the specified website for needing feedback channel information；In this way, each website is designated to need feedback channel after carrying out channel estimation Information can to access point feedback channel information, be not designated to need feedback channel information also need it is each by access point The mode of beam forming report training in rotation (Beamforming Report-Poll) is sent to make the independent feedback channel information of website. As it can be seen that the occupied expense of channel detection process is larger, especially in the more situation of website, channel detection is frequent, serious shadow The handling capacity of system is rung.

Summary of the invention

The embodiment of the present application provides a kind of channel detection method and relevant apparatus, can be in physical layer protocol data unit The middle long training field carried without precoding, so that each website can carry out channel estimation according to the long training field, with The mode for individually sending zero data message is compared, and can reduce the expense of channel detection.

In a first aspect, the embodiment of the present application provides a kind of channel detection method, and in the channel detection method, the first equipment It can be generated physical layer protocol data unit (PHY Protocol Data Unit, PPDU), the PPDU includes by prelisting The data field of code and long training field without precoding；First equipment sends the PPDU, is used at least one Second equipment carries out channel estimation according to the long training field.Wherein, at least one second equipment is associated for the first equipment Equipment, such as the first equipment can be access point (Access Point, AP), at least one second equipment can be access point institute The terminal device of service.Wherein, which can be send wave beam forming physical layer protocol data unit, or downlink is more User's multiple-input and multiple-output physical layer protocol data unit.In this way, the first equipment transmission physical layer protocol data unit just The long training field for channel estimation can be carried, it, can be with compared with the channel detection process for individually sending zero data message Reduce the expense of channel detection.

In one possible implementation, which also includes instruction information, and the instruction information is used to indicate described The target destination point whether long training field is used for data field in the PPDU carries out channel estimation；Alternatively, the instruction Whether the intended recipient website that information is used to indicate data field in the PPDU, which carries out channel according to the long training field, is estimated Meter.

Wherein, whether it includes training word without the long of precoding which may be used to indicate that in the PPDU Section, that is to say, that the instruction information can indicate that the PPDU that the first equipment is sent is the PPDU for sending data, still both use It is also used to carry out the PPDU of channel estimation in transmission data.

Wherein, described when target destination point of the long training field for data field in PPDU carries out channel estimation At least one second equipment is contained in the intended recipient website；When the long training field is not used in data in the PPDU When the target destination point of field carries out channel estimation, at least one described second equipment is not included in the intended recipient website In.The intended recipient website is equipment indicated by equipment identification information in the physical layer packet header of the PPDU, that is to say, that the mesh Mark receiving station is the equipment for being designated to receive data field portion in the PPDU.

As it can be seen that the implementation by indicate information can indicate intended recipient website according to above-mentioned long training field into Row channel estimation, or the equipment by indicating that information can indicate non-targeted receiving station are carried out according to above-mentioned long training field Channel estimation can be with compared with individually sending zero data message notifying message informing which equipment and carrying out the mode of channel estimation Reduce the expense of channel detection.

In one possible implementation, the first equipment can also send first message before sending above-mentioned PPDU, First message include first identifier information, first message be used to indicate indicated by the first identifier information it is described at least one Second equipment carries out channel estimation according to the long training field.The implementation and the implementation of above-mentioned instruction information are mutually tied It closes, which website in intended recipient website can be specified and carry out which in channel estimation or non-targeted receiving station A little websites carry out channel estimation.

Wherein, which is used to indicate at least one second equipment, for example, the first identifier information includes should The connection identifier (Assosiation ID, AID) of at least one the second equipment also may include being used to indicate this at least one Other instruction information of the connection identifier of two equipment, that is to say, that the embodiment of the present application does not limit the finger of first identifier information Show mode.

The implementation carries out channel detection in conjunction with PPDU described above, compared with current channel detection process, It still can reduce the expense of channel detection.

In one possible implementation, it should may include without the long training field of precoding in above-mentioned PPDU's In physical layer preamble.

In one possible implementation, the PPDU can also include second identifier information, the second identifier information It is used to indicate the second equipment of feedback channel information while PPDU transmission at least one second equipment, the channel Information is the second equipment indicated by the second identifier information according to long training field progress channel estimation acquisition.Its In, the second equipment indicated by second identifier information is one or more of at least one described second equipment.In a reality It applies in example, which can be the matchmaker for needing the second equipment of feedback channel information while above-mentioned PPDU transmission Body access control MAC address or AID, can also be other instruction information, these indicate information to indicate to need in above-mentioned PPDU The MAC address or AID of the second equipment of feedback channel information, the embodiment of the present application do not limit while transmission The indicating mode of second identifier.

As it can be seen that the implementation compared with also needing to send beam forming report polling message, can reduce channel detection The middle expense for notifying the second equipment reporting channel information.

Wherein, for the second equipment with full-duplex communication ability, can believe reporting channel while receiving PPDU Breath, so as to reduce each channel detection occupied time.

For example, the second identifier information may include in the media access control MAC packet header of the PPDU；If having complete double Second equipment of work communication capacity have it is multiple, then need feedback channel information the second equipment can using uplink multi-users it is how defeated Enter multi output (Up Link MultiUser Multiple Input Multiple Output, UL MU-MIMO) or orthogonal frequency The mode of multiple access (Orthogonal Frequency Division Multiple Access, OFDMA) is divided to carry out feedback channel letter Breath.Correspondingly, the channel detection method can also include: the first equipment receiving channel information while the PPDU is transmitted.

Wherein, referring to that the first equipment is sent in the occupied duration of wireless channel used in PPDU " simultaneously " can also receive Channel information.Correspondingly, channel information can also be sent by being somebody's turn to do in the duration that can also refer to the second equipment reception PPDU " simultaneously ", this The ability that the first equipment and the second equipment of sample need to have full-duplex communication.

For example, the first equipment can be while the PPDU be transmitted with the upper receiving channel information of frequency, correspondingly, needing anti- The second equipment for presenting channel information can also be while receiving the PPDU with sending channel information on frequency, that is to say, that The wireless channel of PPDU transmission can be identical with the wireless channel that channel information transmits.

For another example the first equipment can also the PPDU transmit while different frequencies on receiving channel information, correspondingly, Channel information can also be sent in different frequencies while receiving the PPDU by needing the second equipment of feedback channel information, also It is to say, wireless channel and the wireless channel that channel information transmits time quantum having the same and the different frequencies of PPDU transmission Rate.

In alternatively possible implementation, the PPDU also includes feedback information types instruction, the feedback information The channel information that type instruction is used to indicate feedback is channel quality instruction or channel indicating information.Wherein, channel indicating information For the parameter information of other feedback channel qualities in channel information other than channel quality instruction.

Optionally, predefined mode can also be used, is pre-defined in the PPDU indicated by second identifier information The channel information of second equipment feedback is channel quality instruction.

In this way, the first equipment is in institute when the indicated channel information of feedback information types instruction is that channel quality indicates State PPDU transmission while receiving channel information after, can with the following steps are included:

First equipment determines the second equipment for needing feedback channel instruction information, institute according to channel quality instruction It states and the second equipment of feedback channel instruction information is needed to be contained in the second equipment indicated by the second identifier information；

First equipment sends second message, and the second message includes third identification information, the third mark letter Breath is used to indicate second equipment for needing feedback channel instruction information；

The second message is used to indicate the instruction information of the second equipment feedback channel indicated by the third identification information, The channel indicating information is the second equipment indicated by the third identification information according to long training field progress channel What estimation obtained.

In one possible implementation, it should may include in above-mentioned PPDU without the long training field of precoding In field after data field, i.e. the long training field postposition without precoding.

No matter should without precoding long training field is preposition or postposition, for how to notify to carry out the of channel estimation Two equipment carry out feedback channel information, can use following possible embodiment.

For example, in one possible implementation, the PPDU can also include subframe, the subframe includes the second mark Know information, the subframe is used to indicate the second equipment feedback channel indicated by second identifier information described in second equipment Information, the channel information are the second equipment indicated by the second identifier information according to long training field progress channel What estimation obtained.

In alternatively possible implementation, after the first equipment sends the PPDU, the method also includes: it is described First equipment sends third message, and the third message includes second identifier information, and the third message is used to indicate described the Second equipment feedback channel information indicated by second identifier information described in two equipment, the channel information are second mark Know the second equipment indicated by information and channel estimation acquisition is carried out according to the long training field.

Correspondingly, feedback information types instruction can also be carried in above-mentioned subframe or third message, it is used to indicate the second mark Know the instruction of the second equipment reporting channel quality indicated by information or channel indicating information.

In this way, when the indicated channel information to be fed back of feedback information types instruction is that channel quality indicates, the After one equipment receives channel information, can execute: first equipment indicates to determine according to the channel quality to be needed instead The second equipment of channel indicating information is presented, second equipment for needing feedback channel instruction information is contained in the second identifier In second equipment indicated by information；First equipment sends second message, and the second message includes third identification information, The third identification information is used to indicate second equipment for needing feedback channel instruction information；The second message is for referring to Show that the second equipment feedback channel indicated by the third identification information indicates information, the channel indicating information is the third Second equipment indicated by identification information carries out channel estimation acquisition according to the long training field.

Optionally, when feedback channel information, channel can be indicated for the second equipment for being contained in intended recipient website Information, channel information and the confirmation message ACK to be fed back are reported after being polymerize.The ACK is to contain in intended recipient website The second equipment be directed to and receive the confirmation of data field in PPDU.

Optionally, the second message or third message that the first equipment is sent can be with reception intended recipient website feedbacks ACK is by the way of full-duplex communication.That is the first equipment can be in the duration of the ACK for receiving intended recipient website feedback Send second message or third message.

Optionally, the second equipment feedback channel information of non-targeted receiving station and the first equipment send PPDU using complete double Second equipment of the mode of work, i.e., non-targeted receiving station can be in the first equipment for sending the duration internal feedback channel of PPDU Information.

Optionally, the number of the occupied time quantum of the above-mentioned long training field without precoding is the first equipment institute The number of data streams of support.

In one possible implementation, it is described at least one be contained in without the long training sequence of precoding it is described In field in PPDU after data field.

In one possible implementation, the PPDU also includes channel type instruction, and the feedback information types refer to Show that being used to indicate the channel information is channel quality instruction or channel indicating information.

In one possible implementation, when the channel information is that channel quality indicates, first equipment is in institute After receiving the channel information while stating PPDU transmission, the method also includes:

First equipment determines the second equipment for needing feedback channel instruction information, institute according to channel quality instruction It states and the second equipment of feedback channel instruction information is needed to be contained in the second equipment indicated by the second identifier information；It is described First equipment sends second message, and the second message includes third identification information, and the third identification information is used to indicate institute State the second equipment for needing feedback channel instruction information；

The second message is used to indicate the instruction information of the second equipment feedback channel indicated by the third identification information, The channel indicating information is the second equipment indicated by the third identification information according to long training sequence progress channel What estimation obtained.

In one possible implementation, the PPDU also includes subframe, and the subframe includes second identifier information, institute It states subframe and is used to indicate the second equipment feedback channel indicated by second identifier information described at least one described second equipment Information, the channel information are the second equipment indicated by the second identifier information according to long training sequence progress channel What estimation obtained.

In one possible implementation, after first equipment sends the PPDU, the method also includes:

First equipment sends third message, and the third message includes second identifier information, and the third message is used Second equipment feedback channel information indicated by second identifier information described at least one second equipment described in indicating, it is described Channel information is the second equipment indicated by the second identifier information according to long training sequence progress channel estimation acquisition 's.

In one possible implementation, the method also includes: first equipment receives the channel information.

Second aspect, the embodiment of the present application also provide a kind of channel detection method, which is from carrying out letter What the angle of the second equipment of road estimation was illustrated.Wherein, which may include: that the second equipment receives physics Layer protocol data cell PPDU, the PPDU include the data field Jing Guo precoding and the long training word without precoding Section；Second equipment carries out channel estimation according to the long training field.

In one possible implementation, the PPDU also includes instruction information, and the instruction information is used to indicate institute State the target destination point progress channel estimation whether long training field is used for data field in the PPDU；Alternatively, the finger Show that whether information is used to indicate the intended recipient website of data field in the PPDU according to long training field progress channel Estimation.

In one possible implementation, second equipment indicates that the long training field is used in the instruction information When the target destination point of data field carries out channel estimation in the PPDU and second equipment is contained in the target When in receiving station, channel estimation is carried out according to the long training field；And when the instruction information instruction long training When the target destination point that field is not used in data field in the PPDU carries out channel estimation and second equipment does not include When in the intended recipient website, channel estimation is carried out according to the long training field.

In one possible implementation, the method also includes:

Second equipment receives first message, and the first message includes first identifier information, the first identifier letter Breath is used to indicate the equipment for carrying out channel estimation according to the long training field；

When in equipment indicated by second equipment is contained in the first identifier information, second equipment is executed Described the step of channel estimation is carried out according to the long training field.

In one possible implementation, the long training field without precoding is contained in the object of the PPDU During reason layer is leading.

In one possible implementation, the long training field without precoding is contained in number in the PPDU According in the field after field.

In one possible implementation, the PPDU also includes second identifier information,

The equipment that the second identifier information is used to indicate feedback channel information while PPDU transmission, the letter Road information is equipment indicated by the second identifier information according to long training field progress channel estimation acquisition.

In one possible implementation, it is set when second equipment is contained in indicated by the second identifier information When standby middle, the method also includes:

Second equipment sends channel information while receiving the PPDU, and the channel information sets for described second It is standby that channel estimation acquisition is carried out according to the long training field.

In one possible implementation, the PPDU also includes feedback information types instruction, the feedback information class It is channel quality instruction or channel indicating information that type instruction, which is used to indicate the channel information,.

In one possible implementation, when the channel information is that channel quality indicates, second equipment is being connect After sending channel information while receiving the PPDU, the method also includes:

Second equipment receives second message, and the second message includes third identification information, the third mark letter Breath is used to indicate the equipment that feedback channel instruction information is needed in equipment indicated by the second identifier information；

When in equipment indicated by second equipment is contained in the third identification information, second equipment is sent Channel indicating information, the channel indicating information are second equipment according to long training field progress channel estimation acquisition 's.

In one possible implementation, the PPDU also includes subframe, and the subframe includes second identifier information, institute It states subframe and is used to indicate equipment feedback channel information indicated by the second identifier information, the channel information is described second Equipment indicated by identification information carries out channel estimation acquisition according to the long training field.

In one possible implementation, second equipment according to the long training field carry out channel estimation it Afterwards, the method also includes:

Second equipment receives third message, and the third message includes second identifier information, and the third message is used The equipment feedback channel information indicated by the instruction second identifier information, the channel information are the second identifier information Indicated equipment carries out channel estimation acquisition according to the long training field.

Second equipment sends the channel information, and the channel information is second equipment according to the long training Field carries out channel estimation acquisition.

Wherein, channel detection method described in present aspect can be with reference to the elaboration of the related content of above-mentioned first aspect, this In be not repeated.

The third aspect, the embodiment of the present application also provide a kind of channel detection device, which may include place Module, communication module etc. are managed, can also include other modules to realize the correlation function of the first equipment in above-mentioned aspect.

Fourth aspect, the embodiment of the present application also provide another channel detection device, which may include Communication module and processing module etc. can also include other modules to realize the correlation function of the second equipment in above-mentioned aspect.

5th aspect, the embodiment of the present application also provide a kind of communication equipment, which, which has, realizes above-mentioned realization side The function of first equipment and/or the second equipment in method.The function can pass through hardware realization, it may for example comprise processor and communication Interface can also execute corresponding software realization by hardware.The hardware or software include one or more and above-mentioned function Corresponding module, the module can be software and/or hardware.

6th aspect, the embodiment of the present application also provides a kind of computer readable storage medium, the readable storage medium storing program for executing On be stored with and either realize in above-mentioned various aspects channel detection method provided by face or any in above-mentioned various aspects The program code of any one or more provided channel detection method in aspect in possible implementation, the program generation Code is comprising either in channel detection method provided by face either in the above-mentioned various aspects of operation or above-mentioned various aspects Any one or more provided channel detection method in face in possible implementation executes instruction.

7th aspect, the embodiment of the present application also provides a kind of computer program products including instruction, when the calculating When machine program product is run on computers, so that computer executes method described in above-mentioned various aspects.The computer program Program in product can be stored in whole or in part on the storage medium that is packaged together of processing, can also part or It is stored entirely on the memory not being packaged together with processor.

Eighth aspect, the application also provide a kind of processor, which may include at least one circuit for generating Physical layer protocol data unit PPDU, the PPDU are comprising the data field Jing Guo precoding at least one without precoding Long training sequence；The processor further includes at least one circuit for sending the PPDU, in order to which at least one second sets It is standby that channel estimation is carried out according to the long training sequence.Above-mentioned processor can be chip.The processor can be executed for real The instruction or program of function involved in existing aforementioned first equipment.

9th aspect, the embodiment of the present application also provides another processor, which may include at least one electricity Road for receiving physical layer protocol data unit PPDU, the PPDU include data field Jing Guo precoding at least one not By the long training sequence of precoding；The processor further includes that at least one circuit is used to carry out letter according to the long training sequence Road estimation.The processor can be chip.The processor can execute for realizing function involved in aforementioned second equipment Instruction or program.

Tenth aspect, the embodiment of the present application also provides a kind of chip system, which includes processor, for It states the first equipment and/or the second equipment realizes function involved in above-mentioned aspect, for example, generating or handling institute in the above method The data and/or information being related to.In a kind of possible design, the chip system further includes memory, the memory, is used The first equipment and/or the necessary program instruction of the second functions of the equipments and data are realized in saving.The chip system, can be by chip It constitutes, also may include chip and other discrete devices.

Detailed description of the invention

Fig. 1 is a kind of flow diagram of channel detection method in the prior art in the time domain；

Fig. 2 is a kind of structural schematic diagram of communication system provided by the embodiments of the present application；

Fig. 3 is a kind of structural schematic diagram of physical layer protocol data unit provided by the embodiments of the present application；

Fig. 4 is the structural schematic diagram of another physical layer protocol data unit provided by the embodiments of the present application；

Fig. 5 a is a kind of flow diagram of channel detection method provided by the embodiments of the present application；

Fig. 5 b is a kind of flow diagram of channel detection method provided by the embodiments of the present application in the time domain；

Fig. 6 is the flow diagram of another channel detection method provided by the embodiments of the present application in the time domain；

Fig. 7 is the flow diagram of another channel detection method provided by the embodiments of the present application in the time domain；

Fig. 8 is the flow diagram of another channel detection method provided by the embodiments of the present application in the time domain；

Fig. 9 is the flow diagram of another channel detection method provided by the embodiments of the present application in the time domain；

Figure 10 is the flow diagram of another channel detection method provided by the embodiments of the present application in the time domain；

Figure 11 is the flow diagram of another channel detection method provided by the embodiments of the present application in the time domain；

Figure 12 is a kind of structural schematic diagram of channel detection device provided in an embodiment of the present invention；

Figure 13 is the structural schematic diagram of another channel detection device provided by the embodiments of the present application；

Figure 14 is a kind of structural schematic diagram of device provided by the embodiments of the present application；

Figure 15 is a kind of structural schematic diagram of terminal device provided by the embodiments of the present application；

Figure 16 is a kind of structural schematic diagram of the network equipment provided by the embodiments of the present application.

Specific embodiment

The term that presently filed embodiment part uses is only used for explaining the specific embodiment of the application, rather than It is intended to limit the application.

In order to reduce multi-user in multi-input multi-output system (Multiple Input Multiple Output, MIMO) Between interfere with each other, promoted mimo system in power system capacity, in general, AP before carrying out data transmission, can pass through channel detection (Sounding) process obtains channel information.Fig. 1 shows a channel detection process, and access point can first send one zero number According to message notifying message NDP Annoucement, to notify it needs to obtain the STA1 of channel information to STA3 to prepare to receive it By the zero data message NDP frame of transmission；AP sends NDP frame and the specified STA1 for needing feedback channel information immediately, and STA1 is extremely STA3 estimates respective down channel according to the long training sequence (Long Training Field, LTF) in the NDP frame；By AP The STA1 of specified feedback channel information immediately feeds back the channel information of its estimation after having received NDP frame, is not specified by NDP frame STA2, STA3 continue waiting for the feedback notification of AP；AP can trigger message (Beamforming by beam forming report training in rotation Report-Poll Trigger, BRP Trigger) a STA feedback channel information is specified every time.As shown in Figure 1, AP is to every It is entire Sounding process that a STA, which sends NDP, Beamforming Report-Poll and the independent feedback channel information of each STA, Major cost.The expense of Sounding is bigger, and the actual gain of MIMO is with regard to smaller.In addition, since STA is according to Sounding The NDP that AP early period is sent carries out channel estimation, so if Sounding duration is longer, the validity meeting of channel estimation It is deteriorated, will affect the effect of precoding also to influence the performance of MIMO.

(for example, increasing to 8~16 antennas from 4 present antennas), AP are continuously increased with the end AP antenna amount More and more STA will be supported to carry out DL MU-MIMO transmission, it is therefore desirable to more frequently being carry out channel detection process.Such as figure Shown in 1, each Sounding process requires to occupy the channel resource of certain time, this will be difficult to meet more frequent Sounding needs.

Therefore, the embodiment of the present application proposes a solution, can promote the efficiency of channel detection, and reduces channel spy The expense of survey, further, the embodiment of the present application also proposes a solution, which can be based on full duplex (Full Duplex, FD) in wireless communication technique AP and STA can simultaneously or simultaneously with the carry out downstream transmission of frequency the characteristics of, into one The efficiency of the promotion channel detection of step, and the expense of channel detection is reduced, it is described in detail below.

Fig. 2 shows a kind of exemplary application scenes of the embodiment of the present application.In the communication system 100, comprising: one One equipment, such as AP101, and with associated one or more second equipment of first equipment 101, for example, STA201, STA202, STA203 and STA204.Wherein, the AP101 transmission with STA201, STA202 progress PPDU, i.e. STA201, STA202 is the intended recipient website of the PPDU transmitted, it may also be said to, the designated reception of STA201, STA202 is transmitted The equipment of data field in PPDU；STA203, STA204 are the non-targeted receiving station of the PPDU transmitted, are not designated as The equipment for receiving data field in transmitted PPDU.It should be understood that the first equipment and second in above-mentioned communication system 100 The quantity of equipment is merely exemplary, and does not constitute the restriction to the embodiment of the present application.

In the embodiment of the present application, the first equipment can be base station, transmitting and receiving point (Transmission Reception Point, TRP) or Remote Radio Unit (Radio Remote Unit, RRU) and other kinds of access point (Access Point,AP).It is communicated in the sky by one or more sectors with terminal on interface in net for example, base station can be to refer to the accession to Equipment, attribute management of the tunable to air interface.For example, the base station can be the base station in GSM or CDMA, as base station is received It sends out platform (base transceiver station, BTS), is also possible to the base station in WCDMA, such as NodeB, can also be LTE In evolved base station can also be the base station in 5G system, or not such as eNB or e-NodeB (evolutional Node B) Come base station in network, etc., the application is without limitation.Optionally, which can also be trunking, or have base station Other network element devices of function.In addition, first equipment should also have the energy of full-duplex communication in some embodiments of the present application Power.

In the embodiment of the present application, the second equipment can be wireless terminal, which can be directed to user and provide language The equipment of sound and/or data connectivity has the handheld device of wireless connecting function or is connected to radio modem Other processing equipments, can be through wireless access network (such as RAN, radio access network) and one or more core nets It is communicated.For example, the user equipment can be mobile terminal, such as mobile phone (or being " honeycomb " phone) and with movement The computer of terminal, can also be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, such as People's communication service (Personal Communication Service, PCS) phone, wireless phone, Session initiation Protocol (Session Initiation Protocol, SIP) phone, wireless local loop (Wireless Local Loop, WLL) Stand, personal digital assistant (Personal Digital Assistant, PDA) etc., they exchanged with wireless access network language and/ Or data.Optionally, which can also be known as mobile station (Mobile Station, MS), mobile terminal (mobile Terminal), subscriber unit (Subscriber Unit, SU), subscriber station (Subscriber Station, SS), movement station (Mobile Station, MB), distant station (Remote Station, RS), access point (Access Point, AP), long-range end Hold (Remote Terminal, RT), access terminal (Access Terminal, AT), user terminal (User Terminal； UT), user agent (User Agent, UA), terminal device (User Device, UD) etc., the application is without limitation.In addition, this Apply in embodiment, the second equipment can have full-duplex communication ability or half-duplex operation ability.

It " simultaneously " is substantive same involved by the present embodiment it should be noted that the working principle based on transceiver When, not needing to be strictly limited at the processing on above-mentioned different channel does not have difference on any time, it is only necessary to meet whole Upper above-mentioned processing is roughly the same in time dimension.And multiple websites are communicated with AP simultaneously in the embodiment of the present application scheme It is beneficial.For example, this allows AP while sending PPDU, the channel information of multiple website feedbacks, lifting system are received Efficiency.For example, can be with receiving channel information in the occupied duration of wireless channel used in the first equipment transmission PPDU.Example again Such as, channel information can also be sent in the duration of the second equipment reception PPDU, such first equipment and the second equipment need to have There is the ability of full-duplex communication.

It should be understood that the terms "and/or", only a kind of incidence relation for describing affiliated partner, expression can deposit In three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B. In addition, character "/", expression forward-backward correlation object are a kind of relationships of "or" herein.

Herein, first identifier information is used to indicate estimates according to Non-precoded LTF field progress channel in the application At least one second equipment of meter；Second identifier information is used to indicate the equipment for needing feedback channel information；That is, second Second equipment indicated by identification information is contained at least one second equipment indicated by first identifier information.In addition, the Three identification informations are used to indicate the equipment that further feedback channel instruction information is needed in the equipment of feedback channel quality instruction, That is, the second equipment indicated by third identification information is contained in the second equipment indicated by second identifier information.

Wherein, first identifier information may include connection identifier (Assosiation ID, AID), or may include using In other instruction information for the connection identifier for indicating the second equipment；Second identifier information may include the AID or matchmaker of the second equipment Body access control address, or may include other instructions for being used to indicate the AID or media access control address of the second equipment Information；Third identification information may include the AID of the second equipment, or may include the connection identifier for being used to indicate the second equipment Other instruction information.That is, the embodiment of the present application does not limit first identifier information, second identifier information and third mark Know the indicating mode of information.

Below with reference to more attached drawings, the scheme of the embodiment of the present application is illustrated.

The embodiment of the present application provides a kind of physical layer protocol data unit, which is suitable for In MIMO technology, the physical layer protocol data unit other than comprising the data field Jing Guo precoding, can also comprising without Cross the long training field of precoding.Position of the long training field in the PPDU based on this without precoding, the application Embodiment provides a kind of physical layer protocol data unit that LTF is preposition and a kind of physical layer protocol data unit of LTF postposition.

In the embodiment of the present application, " preposition " in LTF preposition physical layer protocol data unit is relative to LTF postposition For " postposition " in physical layer protocol data unit.That is, LTF in LTF preposition physical layer protocol data unit Field is located at before the physical layer protocol data unit, for example, the LTF field is located at the physics of physical layer protocol data unit In layer leader sequence；After LTF field is located at the physical layer protocol data unit in the physical layer protocol data unit of LTF postposition Face, for example, the LTF field is located in the field in physical layer protocol data unit after data field.Wherein, the LTF field To contain the long training sequence without precoding, so that the second equipment is according to the length in the LTF field without precoding Training sequence carries out channel estimation.That is, should be without the LTF field of precoding to contain the length without precoding Therefore training sequence should carry out channel estimation at least one second equipment without the LTF field of precoding.

Wherein, the physical layer protocol data unit remove including legacy preamble (Legacy Preamble, L-Preamble), Outside new leading (New Preamble) and data (data) field, the long training without precoding processing is further comprised (Non-precoded LTF) field.It include N in the PPDU_STSA LTF symbol may include in physical layer protocol data unit N_STSA LTF field without precoding processing, wherein N_STSIt can be the quantity of the AP spatial data supported.

Referring to Fig. 3, Fig. 3 is a kind of lattice of the preposition physical layer protocol data unit of LTF provided by the embodiments of the present application Formula schematic diagram.As shown in figure 3, L-Preamble is the preface information of compatible traditional equipment, major function is that equipment is allowed to carry out just The synchronization of step, gain adjustment, channel estimation and allows traditional equipment to understand the information such as frame length, the part and at present defined in pass System header type；New-SIG is the signaling field in New Preamble, it may include coding and modulation system, uplink and downlink The information such as instruction, the identification of basic service set BSS, bandwidth.

As shown in figure 3, the LTF field without precoding processing is contained in New Preamble, can support opposite Estimated in the new equipment of traditional equipment according to the channel during should carrying out channel detection without the LTF field of precoding processing Meter.Remaining part (i.e. Rest of the New-Preamble) may include remaining preface information in New Preamble, Such as short preamble field, long preambles field etc., serve mainly to facilitate or support the second new equipment to carry out accurately synchronous, gain Adjustment etc..Traditional equipment described here or new equipment are in contrast, for example, traditional equipment can be that can not support According to without precoding LTF field carry out channel estimation the second equipment, new equipment be can support according to without The LTF field of precoding carries out the second equipment of channel estimation.Wherein, in above-mentioned application scenarios shown in Fig. 2, the second equipment STA201-204 is new equipment, all has the ability that channel estimation is carried out according to the LTF field without precoding.

Referring to Fig. 4, Fig. 4 is the structural representation of another physical layer protocol data unit provided by the embodiments of the present application Figure.Wherein, PPDU shown in Fig. 4 and PPDU shown in Fig. 3 the difference is that, in PPDU shown in Fig. 4, Non-precoded LTF field is positioned at PPDU's finally, being located in PPDU in the subsequent field of data field.

For example, being based on Fig. 3 or PPDU shown in Fig. 4, Fig. 5 a is please referred to, Fig. 5 a is a kind of letter provided by the embodiments of the present application The flow diagram of road detection method, the channel detection method may comprise steps of:

101, the first equipment generates PPDU, which includes the data field Jing Guo precoding and the length without precoding Training field；

102, the first equipment sends the PPDU；

103, at least one second equipment receives the PPDU, and according to the long training field in the PPDU without precoding Carry out channel estimation.

For example, first equipment can be the access point AP101 in Fig. 2, the second equipment can be the website in Fig. 2 STA201-STA204。

In the channel detection method, channel detection process is sent into physical layer protocol data unit with the first equipment and is combined Channel detection is carried out to avoid individually sending NDP, so as to reduce the expense of NDP frame in channel detection compared with above-mentioned Fig. 1.

Figure 5b shows that the exemplary scenes for sending PPDU of one kind of the embodiment of the present application, as shown in Figure 5 b, in the time domain, There are two types of the PPDU that first equipment is sent, and one is the PPDU, i.e., normal PPDU that do not include Non-precoded LTF field； Another kind is the PPDU comprising Non-precoded LTF field, at least one second equipment can be made to carry out channel estimation PPDU.As it can be seen that not needing individually to send the NDP in Fig. 1 again in Fig. 5 b, it is thus possible to reduce channel detection to a certain extent The expense of middle NDP.

For example, being based on application scenarios shown in Fig. 2, PPDU is can be generated in AP101, which includes the number Jing Guo precoding According to field and without the long training field of precoding, AP101 sends the PPDU；STA201 to 204 can receive the PPDU, and Channel estimation is carried out without the long training field of precoding according in the PPDU, NDP frame is individually sent so as to avoid AP101 To carry out expense brought by channel detection.

In one possible implementation, the embodiment of the present application also provides the format of PPDU a kind of, i.e. Fig. 3 or Fig. 4 institute It can also be used to indicate whether the Non-precoded LTF field is used comprising instruction information, the instruction information in the PPDU shown The target destination point of data field carries out channel estimation in the PPDU；Alternatively, the instruction information be used to indicate it is described Whether the intended recipient website of data field is according to Non-precoded LTF field progress channel estimation in PPDU.

In this way, when the Non-precoded LTF field is clicked through for the target destination of data field in the PPDU When row channel estimation, at least one described second equipment is contained in the intended recipient website；As the Non-precoded LTF field be not used in data field in the PPDU target destination point carry out channel estimation when, it is described at least one second Equipment is not included in the intended recipient website.

Wherein, intended recipient website is the website for being designated to receive the data field of the PPDU, that is to say, that with the Second equipment of one equipment progress MIMO transmission；Non-targeted receiving station is the number without being designated to receive the PPDU According to the website of field, that is to say, that not in the second equipment for carrying out MIMO transmission with the first equipment.Wherein, quilt The website of the specified data field for receiving the PPDU is indicated by the identification information in the physical layer packet header in the PPDU.

In addition, whether the instruction information may be used to indicate that in PPDU comprising Non-precoded LTF field.

For example, it is assumed that the instruction information is that the indicating bit of 1-bit can indicate mesh when then the indicating bit of the 1-bit is 1 It marks receiving station and channel estimation is carried out according to the Non-precoded LTF field, the second equipment in above-mentioned Fig. 5 a is contained in this Intended recipient website；When the indicating bit of the 1-bit is 0, non-targeted receiving station can be indicated according to the Non-precoded LTF field carries out channel estimation, and the second equipment in above-mentioned Fig. 5 a is contained in non-targeted receiving station.

For another example assuming that the instruction information is the indicating bit of 2-bit, then when the indicating bit of the 2-bit is 01, target is indicated Receiving station carries out channel estimation according to the Non-precoded LTF field；When the indicating bit of the 2-bit is 10, non-mesh is indicated It marks receiving station and channel estimation is carried out according to the Non-precoded LTF field；When the indicating bit of the 2-bit is 00, indicating should PPDU does not include Non-precoded LTF field, is normal PPDU.

Therefore, the second equipment is estimated according to the Non-precoded LTF field progress channel in the PPDU in above-mentioned Fig. 5 a Meter may include: for each second equipment, after receiving the PPDU, when second equipment is contained in the intended recipient In website and when instruction information indicates that the long training field carries out channel estimation for target destination point, the second equipment root Channel estimation is carried out according to the Non-precoded LTF field；When second equipment is not included in the intended recipient website When and the instruction information indicate that the Non-precoded LTF field is not used in target destination point and carries out channel estimation (i.e. The instruction information indicates that the Non-precoded LTF field carries out channel estimation for non-targeted receiving station) when, root Channel estimation is carried out according to the Non-precoded LTF field.

In this way, can indicate which the second equipment carries out channel estimation in the implementation by instruction information, without NDP Announcement must be a need to separately transmit as shown in Figure 1 notifies carry out channel estimation for which the second equipment, therefore can save The expense for sending NDP Announcement and NDP is saved, the expense of channel detection is reduced.

For example, AP101 generates PPDU based in application scenarios shown in Fig. 2, which includes without precoding LTF field and instruction information, the instruction information are 01 channel estimation to indicate long training field for intended recipient website, AP101 sends the PPDU；STA201 to 204 receives the PPDU, since instruction information instruction long training field connects for target It receives the channel estimation of website and STA201 and STA202 is intended recipient website, therefore STA201 and STA202 is according to length training word Duan Jinhang channel estimation；STA203 and STA204 need not then carry out channel estimation.

In one possible implementation, in channel detection method shown in above-mentioned Fig. 5 a, the first equipment sends above-mentioned PPDU before, first message can also be sent, first message includes first identifier information；The first message is used to indicate institute It states at least one second equipment indicated by first identifier information and channel estimation is carried out according to the long training field；At least one Second equipment receives first message, and when at this, at least one second equipment is contained in equipment indicated by first identifier information Channel estimation is carried out according to the long training field without precoding.

For example, the first message can be the NDP Announcement in Fig. 1, in this way, with shown in above-mentioned Fig. 3 or Fig. 4 PPDU combine, the expense of channel detection can be reduced.

In one example, second be contained in intended recipient website can be notified to set by NDP Announcement Standby middle the second equipment of part carries out channel estimation, i.e. at least one second equipment of progress channel estimation is in intended recipient website Equipment component can notify to be contained in non-targeted receiving station by NDP Announcement in another example At least one described second equipment in the second equipment of part carry out channel estimation, i.e., progress channel estimation at least one second Equipment is the equipment component in non-targeted receiving station, and not all non-targeted receiving station will carry out channel estimation. Be more advantageous to the first equipment in this way according to whether determined in the presence of the data for needing to be sent to the second equipment which the second equipment into Row channel estimation.

For example, being based on application scenarios shown in Fig. 2, AP101 can first send first message, the first mark in the first message The equipment for knowing information meaning includes STA203 and STA204, and STA201 to 204 receives the first message, and checks that this first disappears Cease whether equipment indicated by the first identifier information carried is itself, STA203 and STA204 are contained in the first identifier information In indicated equipment, therefore STA203 and STA204 receive PPDU described in the embodiment of the present application after prefixed time interval, and Channel estimation is carried out according to the LTF field without precoding carried in the PPDU, and STA201 to STA202 connects for target Website is received, after receiving the PPDU, checks that the instruction information that the PPDU is carried is 10, to indicate the LTF field without precoding Channel estimation is carried out for the equipment of non-targeted receiving station, therefore STA201 to STA202 receives the data field in the PPDU, and It need not carry out channel estimation.

In one possible implementation, the embodiment of the present application also provides a kind of PPDU, i.e. the PPDU is in addition to including upper The Non-precoded LTF field that implementation is previously mentioned is stated, outside instruction information, before Non-precoded LTF field The PPDU set, the PPDU can also include second identifier information, which is used to indicate in PPDU transmission Second equipment of feedback channel information simultaneously, which is contained in the second equipment of above-mentioned carry out channel estimation, described Channel information is the second equipment indicated by the second identifier information according to long training field progress channel estimation acquisition 's.

In this way, the PPDU transmission while, need feedback channel information the second equipment can with reporting channel information, The further expense for reducing channel detection.

Based on the implementation, channel detection method shown in Fig. 5 a can also include: at least one the second equipment Each of the second equipment, when second equipment is contained in equipment indicated by second identifier information, the second equipment is being connect Channel information is sent while receiving the PPDU, wherein channel information is the second equipment according to above-mentioned Non-precoded LTF Field carries out channel estimation acquisition.

Referring to Fig. 6, Fig. 6 is the process signal of another channel detection method provided by the embodiments of the present application in the time domain Figure.Wherein, Fig. 6 is illustrated by taking application scenarios shown in Fig. 2 as an example, used in channel detection method shown in fig. 6 PPDU is the PPDU comprising Non-precoded LTF field (preposition), instruction information and second identifier information, it is assumed that this refers to Show that information is used to indicate the Non-precoded LTF field and carries out channel estimation for target destination point.As shown in fig. 6, AP101 first sends a normal PPDU, i.e. the PPDU does not include the LTF field without precoding；STA201 to 204 is received The PPDU；STA201 and STA202 views the identification information specified in the packet header for receiving data field including itself in the PPDU And the PPDU does not include instruction information, therefore STA201 and STA202 obtain data field in the PPDU, and return to ACK to AP101 Message is to notify AP101；And STA203 and STA204 are viewed to specify in the packet header for receiving data field in the PPDU and are not included The identification information of itself and the PPDU do not include instruction information, therefore STA203 and STA204 neglect the PPDU；AP101 sends packet The field of LTF containing Non-precoded, the PPDU for indicating information and second identifier information；STA201 to 204 receives the PPDU； STA201 and STA202, which views to specify in the PPDU, to be included the identification information of itself in the packet header for receiving data field and includes Instruction information and the instruction information indicate that the Non-precoded LTF field carries out channel for target destination point and estimates Meter, therefore while STA201 and STA202 receive the PPDU, channel estimation is carried out according to the Non-precoded LTF field, Channel information is obtained, and channel information is returned into AP101；And STA203 and STA204 are viewed and are specified reception in the PPDU It does not include the identification information of itself and the PPDU in the packet header of data field include instruction information, but described in instruction information instruction Non-precoded LTF field carries out channel estimation for target destination point, therefore STA203 and STA204 neglect this PPDU。

In one example, STA201 and STA202 can include the LTF field without precoding having received this Prefixed time interval internal feedback ACK after PPDU；In another example, STA201 and STA202 can be under AP101 transmission Feeding back ACK while one PPDU.

In addition, the ability for needing STA201 and STA202 that there is full-duplex communication in channel detection process shown in fig. 6.

Again referring to Fig. 7, Fig. 7 is that the process of another channel detection method provided by the embodiments of the present application in the time domain is shown It is intended to.Fig. 7 is illustrated by taking application scenarios shown in Fig. 2 as an example, wherein channel detection method shown in Fig. 7 and Fig. 6 institute The channel detection method shown the difference lies in that the instruction information indicates that the Non-precoded LTF field is used in Fig. 7 Non-targeted receiving station carries out channel estimation, therefore in channel detection process shown in Fig. 7, and STA201 and STA202 check that this refers to When showing that information indicates that the Non-precoded LTF field carries out channel estimation for non-targeted receiving station, then no longer carry out Channel estimation；And STA203 and STA204 checks the instruction information instruction Non-precoded LTF field for non-mesh When marking receiving station progress channel estimation, then channel estimation is carried out according to the Non-precoded LTF field.

Optionally, before sending comprising the PPDU without the LTF field of precoding, a zero data can also be sent Message notifying message NDP Announcement, the NDP Announcement frame include the website for needing to carry out channel estimation Mark, as shown in fig. 7, the NDP Announcement frame may include the mark of site STA 203 identification information and site STA 204 Information, the identification information can be the associated identifiers of website.It will be understood, in one example, NDP Announcement frame can also include the identification information of the non-targeted receiving station in part, be used to indicate in non-targeted receiving station Part website carry out channel estimation, for example, may include the identification information of STA203 in the NDP Announcement frame, to refer to Show that STA203 carries out channel estimation according to the PPDU comprising the LTF without precoding.

In one possible implementation, also refer to comprising feedback information types in PPDU provided by the embodiment of the present application Show, it is channel quality instruction or channel indicating information that feedback information types instruction, which is used to indicate fed back channel information,.

In the embodiment of the present application, channel information may include channel state information (Channel State Information, CSI), the beam forming matrix (non-compressed beamforming matrix) without overcompression, Noise in beam forming matrix (compressed beamforming matrix) through overcompression and each OFDM subcarrier Than at least one of (Signal to Noise Ratio, SNR)；Channel indicating information may be in above-mentioned channel information At least one.

Referring to Fig. 8, Fig. 8 is the process signal of another channel detection method provided by the embodiments of the present application in the time domain Figure, Fig. 8 is illustrated by taking application scenarios shown in Fig. 2 as an example, wherein shown in channel detection method shown in Fig. 8 and Fig. 6 Channel detection method the difference is that, STA201 and STA202 feedback channel information be channel quality indicate (Channel Quality Indicator, CQI), that is to say, that STA201 and STA202, can be with while receiving PPDU It is indicated to determine that feedback channel quality instruction or feedback channel indicate information according to the feedback information types that the PPDU is carried.

In channel detection method shown in Fig. 5 a, when the channel information of feedback is that channel quality indicates, described first is set After receiving the channel information while PPDU transmission, the first equipment indicates to determine need according to the channel quality The second equipment of feedback channel instruction information is wanted, second equipment for needing feedback channel instruction information is contained in described second In second equipment indicated by identification information；First equipment sends second message, and the second message is identified comprising third Information, the third identification information are used to indicate second equipment for needing feedback channel instruction information；At least one second Equipment receives second message, and the second message includes third identification information, is contained in indicated by the third identification information The second equipment in equipment can send channel indicating information；First equipment receives the channel indicating information of feedback.

Therefore as shown in figure 8, in one example, which can be BRP Trigger, in the BRP Trigger Including third identification information, the STA201 and STA202 of third identification information indication feedback CQI is both needed to feedback channel instruction letter Breath, therefore STA201 and STA202 receive feedback channel instruction information after the BRP Trigger.

One example can be in the duration that AP101 sends PPDU when STA201 and STA202 feedback channel indicates information The channel indicating information is fed back, the expense of channel detection can be further reduced.In another example, STA201 and STA202 can also feed back the channel indicating information according to uplink scheduling resource indication information in BRP Trigger.

In one possible implementation, for Non-precoded LTF field postposition provided by the embodiments of the present application PPDU, which also includes subframe, i.e., the subframe can be sent with the PPDU simultaneously in polymerized form, that is to say, that The PPDU of Non-precoded LTF field postposition can be merged into the PPDU polymerizeing with the subframe, and the PPDU of the polymerization is total It is leading with one.Wherein, which includes second identifier information, and the subframe is used to indicate at least one described second equipment Second equipment feedback channel information indicated by the second identifier information, the channel information are the second identifier information institute The second equipment indicated carries out channel estimation acquisition according to the long training field.

In one example, the second equipment indicated by second identifier information can be carried out the ACK of feedback and channel information It is fed back after polymerization；In another example, the second equipment indicated by second identifier information can receive Non-precoded ACK and channel information when next PPDU of the PPDU of LTF field postposition after feedback aggregation.

Referring to Fig. 9, Fig. 9 is the process signal of another channel detection method provided by the embodiments of the present application in the time domain Figure, Fig. 9 is illustrated by taking application scenarios shown in Fig. 2 as an example.Fig. 9 the difference from Fig. 6 is that, be used for channel detection PPDU be Non-precoded LTF field postposition PPDU, and do not include second identifier information, but polymerization have subframe, the son Frame is BRP Trigger frame, and the BRP Trigger frame indicates that all intended recipient websites need reporting channel information, then such as Fig. 9 from Fig. 6 the difference is that the opportunity of STA201 and STA202 feedback channel information is different, in Fig. 9, in a kind of example, STA201 and STA202 can after prefixed time interval feedback channel information, STA201 and STA202 does not need to have complete at this time Duplex communication capabilities；In another example, STA201 and STA202 can be while next PPDU be transmitted after feedback aggregation ACK and channel information, need at this time STA201 and STA202 have full-duplex communication ability.

In one possible implementation, for Non-precoded LTF field postposition provided by the embodiments of the present application PPDU, after the first equipment sends the PPDU, third message can be sent, the third message includes second identifier information, institute It states third message and is used to indicate the second equipment feedback channel information indicated by second identifier information described in second equipment, The channel information is the second equipment indicated by the second identifier information according to long training field progress channel estimation It obtains.

Therefore in channel detection method shown in Fig. 5 a, after the first equipment sends PPDU, first equipment sends third Message, the third message include second identifier information, and the third message is used to indicate at least one described second equipment Second equipment feedback channel information indicated by the second identifier information, the channel information are the second identifier information institute The second equipment indicated carries out channel estimation acquisition according to the long training field；At least one second equipment receives the third Message, the second equipment feedback channel information being contained in equipment indicated by the second identifier information；First equipment Receive the channel information of feedback.

For example, referring to Fig. 10, Figure 10 be another channel detection method provided by the embodiments of the present application in the time domain Flow diagram, Figure 10 are illustrated by taking application scenarios shown in Fig. 2 as an example.Channel detection method shown in Fig. 10 and figure 7 the difference is that, Non-precoded LTF field postposition in the PPDU of channel detection is carried out in Figure 10 and does not include the Two identification informations.Before sending the PPDU for carrying out channel detection in AP101, NDP Announcement notice can also be first sent STA203 and STA204 carries out channel estimation according to the above-mentioned PPDU that will be sent；It, can be with after AP101 sends above-mentioned PPDU The third message of transmission is BRP Trigger, which indicates STA203 and STA204 feedback channel information.In this way, STA203 and STA204 can carry out channel estimation after receiving above-mentioned PPDU, but after receiving BRP Trigger Feedback channel information.In a kind of example, STA203 and STA204 can after receiving BRP Trigger prefixed time interval Feedback channel information afterwards；In another example, STA203 and STA204 can after receiving BRP Trigger and Feedback channel information when AP101 sends next PPDU；In another example, STA201 and STA202 can be sent out in AP101 Feeding back ACK when sending first message or third message.

Above-mentioned various possible implementations provided by the embodiments of the present application can using it is wherein at least one or more into Row channel detection, the embodiment of the present application is without limitation.In some instances, the embodiment of the present application can also be by above-mentioned various possibility Implementation combined with existing channel detection process and complete channel detection, the embodiment of the present application is without limitation.For example, asking 1, Figure 11 is the flow diagram of another channel detection method of the offer of the embodiment of the present application 1 in the time domain, Figure 11 refering to fig. 1 It is to be illustrated by taking application scenarios shown in Fig. 2 as an example.Channel detection method shown in Figure 11 can use Fig. 6 and Fig. 7 institute The channel detection method shown.Specifically, assuming that PPDU used in STA201 and STA202 progress channel estimation is first in Fig. 6 It is the 2nd PPDU that STA203 and STA204, which carry out PPDU used in channel estimation, in PPDU, Fig. 7, wherein the first PPDU and the Two PPDU the difference is that the content of instruction information and second identifier information is different, believe by the instruction that the first PPDU is included Breath instruction Non-precoded LTF field carries out channel estimation, Yi Jisuo for intended recipient website, that is, STA201 and STA202 The second identifier information for including is used to indicate STA201 and STA202 feedback channel information while the first PPDU is transmitted；Second Instruction information that PPDU is included instruction Non-precoded LTF field for non-targeted receiving station i.e. STA203 and STA204 carries out channel estimation, and the second identifier information for being included is used to indicate STA203 and STA204 and passes in the 2nd PPDU Feedback channel information while defeated；Wherein, before the first equipment sends the 2nd PPDU, NDP can also be sent Announcement notifies STA203 and STA204 to carry out channel estimation, also, the first equipment can be in STA201 and STA202 The NDP Announcement is sent in the duration of feeding back ACK, it is further to reduce time quantum shared by channel detection, it reduces The expense of channel detection.Optionally, as shown in figure 11, STA201 and STA202 can send the same of the 2nd PPDU in the first equipment When feed back the ACK of a PPDU, thus, the further expense for saving channel detection.

In addition, channel detection method shown in above-mentioned Fig. 6 to Figure 11 can sent based on the mode of full-duplex communication Receiving channel information while PPDU is sent in the modes such as first message, second message or third message while receiving ACK At least one come further reduce the occupied time quantum of channel detection, reduce the expense of channel detection.

Figure 12 is please referred to, Figure 12 is a kind of structural schematic diagram of channel detection device provided in an embodiment of the present invention, is such as schemed Shown in 12, which may include:

Processing module 1301, for generating physical layer protocol data unit PPDU, the PPDU includes by precoding Data field and long training field without precoding；

Communication module 1302 carries out channel according to the long training field for the second equipment for sending the PPDU Estimation.

In one possible implementation, when the long training field connects for the target of data field in the PPDU When receiving website progress channel estimation, second equipment is contained in the intended recipient website；When the long training field not When target destination point for data field in the PPDU carries out channel estimation, second equipment is not included in the mesh It marks in receiving station.

In one possible implementation, it before the communication module sends the PPDU, is also used to send first and disappears Breath, the first message include first identifier information；

The first message is used to indicate second equipment indicated by the first identifier information according to the long instruction Section of practising handwriting carries out channel estimation.

In one possible implementation, the PPDU also includes second identifier information, and the second identifier information is used The second equipment of feedback channel information, the channel information are while indicating in second equipment in PPDU transmission Second equipment indicated by the second identifier information carries out channel estimation acquisition according to the long training field.

In one possible implementation, described in the communication module is also used to receive while the PPDU is transmitted Channel information.

In one possible implementation, when the channel information is that channel quality indicates, processing module 1303 is also used After the communication module 1302 receives the channel information while PPDU is transmitted, referred to according to the channel quality Show that the second equipment for determining and needing feedback channel instruction information, the second equipment of needs feedback channel instruction information are contained in institute It states in the second equipment indicated by second identifier information；

The communication module 1302 is also used to send second message, and the second message includes third identification information, described Third identification information is used to indicate second equipment for needing feedback channel instruction information；

In one possible implementation, the PPDU also includes subframe, and the subframe includes second identifier information, institute It states subframe and is used to indicate the second equipment feedback channel information indicated by second identifier information described in second equipment, it is described Channel information is the second equipment indicated by the second identifier information according to long training field progress channel estimation acquisition 's.

In one possible implementation, it after the communication module sends the PPDU, is also used to send third and disappears Breath, the third message include second identifier information, and the third message is used to indicate the second mark described in second equipment Know the second equipment feedback channel information indicated by information, the channel information is second indicated by the second identifier information Equipment carries out channel estimation acquisition according to the long training field.

In one possible implementation, the communication module is also used to receive the channel information.

Figure 13 is please referred to, Figure 13 is the structural schematic diagram of another channel detection device provided by the embodiments of the present application, should Channel detection device may be provided in the second equipment, and as shown in figure 13, which may include:

The channel detection device is arranged in the second equipment, and the channel detection device includes:

Communication module 1401, for receiving physical layer protocol data unit PPDU, the PPDU includes by precoding Data field and long training field without precoding；

Processing module 1402, for carrying out channel estimation according to the long training field.

In one possible implementation, the processing module is specifically used in the instruction information instruction long instruction When target destination point of the section of practising handwriting for data field in the PPDU carries out channel estimation and second equipment is contained in When in the intended recipient website, channel estimation is carried out according to the long training field；And institute is indicated in the instruction information It states long training field and is not used in the target destination point of data field in the PPDU and carry out channel estimation and second equipment When being not included in the intended recipient website, channel estimation is carried out according to the long training field.

In one possible implementation, the communication module is also used to receive first message, the first message packet Information containing first identifier, the first identifier information are used to indicate the equipment for carrying out channel estimation according to the long training field；

The processing module is specifically used for being contained in equipment indicated by the first identifier information when second equipment When middle, the operation that channel estimation is carried out according to the long training field is executed.

In one possible implementation, the PPDU also includes second identifier information, and the second identifier information is used The equipment of feedback channel information while instruction is in PPDU transmission, the channel information is the second identifier information institute The equipment of instruction carries out channel estimation acquisition according to the long training field.

In one possible implementation, the communication module is also used to be contained in described second when second equipment When in equipment indicated by identification information, channel information is sent while receiving the PPDU, the channel information is described Processing module carries out channel estimation acquisition according to the long training field.

In one possible implementation, when the channel information is that channel quality indicates, the communication module is also used After sending channel information while receiving the PPDU, second message is received, the second message is identified comprising third Information, the third identification information are used to indicate the equipment for needing feedback channel instruction information, needs feedback channel instruction letter Second equipment of breath is contained in the second equipment indicated by the second identifier information；And when second equipment is contained in When in equipment indicated by the third identification information, channel indicating information is sent, the channel indicating information is described second Equipment carries out channel estimation acquisition according to the long training field.

In one possible implementation, the communication module is also used in the processing module according to the long training After field carries out channel estimation, third message is received, the third message includes second identifier information, and the third message is used The equipment feedback channel information indicated by the instruction second identifier information, the channel information are the second identifier information Indicated equipment carries out channel estimation acquisition according to the long training field.

In one possible implementation, the communication module is also used to be contained in described second when second equipment When in equipment indicated by identification information, the channel information is sent, the channel information is the processing module according to Long training field carries out channel estimation acquisition.

Figure 14 is please referred to, Figure 14 is a kind of structural schematic diagram of device provided by the embodiments of the present application, as shown in figure 14, should Device can be terminal device or the network equipment, or chip or circuit, for example may be disposed at the chip or electricity of access point Road.The equipment can correspond to the first equipment or the second equipment in the above method.The apparatus may include processors 110 and storage Device 120.For storing instruction, which is used to execute the instruction of the memory 120 storage to the memory 120, to realize As figure 3 above into the corresponding channel detection method of Figure 11 the first equipment or the step of the second equipment.

Further, which can also include receiver 140 and transmitter 150, and receiver 140 and transmitter 150 can For supporting to be communicated between the second equipment and above-mentioned first equipment, can execute in the above method involved first equipment or The communication of second equipment or interactive process and/or other processes for technology described herein.Further, the device It can further include bus system 130, wherein processor 110, memory 120, receiver 140 and transmitter 150 can be with It is connected by bus system 130.

Processor 110 is used to execute the instruction of the memory 120 storage, receives signal to control and receive device 140, and control Transmitter 150 sends signal, completes in the above method the first equipment or the step of the second equipment.Wherein, receiver 140 and transmission Device 150 can be same or different physical entity.When for identical physical entity, transceiver may be collectively referred to as.It is described to deposit Reservoir 220 can integrate in the processor 210, can also be provided separately with the processor 210.

For example, processor 110 can be used for generating comprising by pre- when the device is configured to can be achieved the function of the first equipment The physical layer protocol data unit of the data field of coding and the long training field without precoding, transmitter 150 can be used for Sending the physical layer protocol data unit memory 120 may include being enough that processor 110 is allowed to generate comprising by precoding Data field and without precoding long training field physical layer protocol data unit instruction, can also be comprising being enough to permit Perhaps 110 scheduling transmitter 150 of processing sends the instruction of the physical layer protocol data unit；

In another example the device be configured to can be achieved the second equipment function when, processor 110 can be used for according to without The long training field of precoding carries out channel estimation, and receiver 140 can be used for receiving the physical layer protocol data unit, memory It may include the instruction for being enough that processor 110 is allowed to carry out channel estimation according to the long training field without precoding in 120, also It may include the instruction for being enough to allow processor scheduling receiver 140 to receive the physical layer protocol data unit.

As a kind of implementation, the function of receiver 140 and transmitter 150 be can be considered through transmission circuit or receipts The special chip of hair is realized.Processor 110 is it is contemplated that pass through dedicated processes chip, processing circuit, processor or general core Piece is realized.

As another implementation, it may be considered that realize that the embodiment of the present application is provided using the mode of general purpose computer The second equipment, example site STA 201 as shown in figure 1 or STA203.It will realize processor 110, receiver 140 and transmitter In memory, general processor realizes processor by executing the code in memory for the program code storage of 150 functions 110, the function of receiver 140 and transmitter 150.

It is designed it is understood that Figure 14 illustrate only simplifying for the device, in practical applications, which can wrap Containing any number of transceiver, processor, memory etc., and all devices that the embodiment of the present application technical solution may be implemented All within the scope of protection of this application.

Concept relevant to technical solution provided by the embodiments of the present application involved in the equipment, explain and detailed description and Other steps refer to the description as described in these contents in preceding method or other embodiments, are not repeated herein.

It can replace, which may also be configured to generic processing system, such as be commonly referred to as chip, the generic processing system It include: that the one or more microprocessors of processor function are provided；And at least part of outside of offer storage medium is deposited Reservoir, it is all these all to be linked together by external bus architecture and other support circuits.

Figure 15 is a kind of structural schematic diagram of terminal device provided by the embodiments of the present application.The terminal device can be this Shen Please the second equipment in embodiment, for example, STA201 shown in Fig. 2 to STA204.For ease of description, Figure 15 is illustrated only The main component of terminal device.As shown in figure 15, which includes processor, memory, control circuit, antenna and defeated Enter output device.Processor is mainly used for handling communication protocol and communication data, and to entire terminal device into Row control, execution software program, the data of processing software program, such as supporting terminal device to execute above-mentioned channel detection side The described movement of second equipment in related embodiment in method.Memory is mainly used for storing software program and data, such as deposits Store up any one or more of PPDU or channel information described in above-described embodiment.Control circuit be mainly used for baseband signal with The conversion of radiofrequency signal and processing to radiofrequency signal.Control circuit and antenna can also be called transceiver together, main to use In the radiofrequency signal of transceiving electromagnetic waveshape.Input/output unit, such as touch screen, display screen, keyboard etc. are mainly used for receiving User input data and to user's output data.

After terminal device booting, processor can read the software program in storage unit, explain and execute software journey The instruction of sequence, the data of processing software program.When needing through wireless transmission data, processor is carried out to sent data After Base-Band Processing, for output baseband signal to radio circuit, radio circuit carries out radiofrequency signal baseband signal after radio frequency processing It is sent out in the form of an electromagnetic wave by antenna.When there is data to be sent to terminal device, radio circuit is received by antenna To radiofrequency signal, radiofrequency signal is converted into baseband signal, and baseband signal is exported to processor, processor is by baseband signal It is converted to data and the data is handled.

It will be understood by those skilled in the art that for ease of description, Figure 15 illustrates only a memory and processor.? In actual terminal device, may exist multiple processors and memory.Memory is referred to as storage medium or storage Equipment etc., the embodiment of the present invention is without limitation.

As a kind of optional implementation, processor may include baseband processor and central processing unit, Base-Band Processing Device is mainly used for handling communication protocol and communication data, and central processing unit is mainly used for carrying out entire terminal device Control executes software program, the data of processing software program.Processor in Figure 15 is integrated with baseband processor and central processing The function of device, it will be understood by those skilled in the art that baseband processor and central processing unit are also possible to processing independent Device is interconnected by technologies such as buses.It will be understood by those skilled in the art that terminal device may include multiple baseband processor with Different network formats are adapted to, terminal device may include multiple central processing units to enhance its processing capacity, terminal device All parts can be connected by various buses.The baseband processor can also be expressed as at baseband processing circuitry or base band Manage chip.The central processing unit can also be expressed as central processing circuit or central processing element.To communication protocol and The function that communication data is handled can it is built-in in the processor, storage unit can also be stored in form of software programs In, software program is executed to realize Base-Band Processing function by processor.

Illustratively, in inventive embodiments, can by with transmission-receiving function antenna and control circuit be considered as terminal and set Processor with processing function is considered as the processing unit 102 of terminal device by standby Transmit-Receive Unit 101.As shown in figure 15, eventually End equipment includes Transmit-Receive Unit 101 and processing unit 102.Transmit-Receive Unit is referred to as transceiver, transceiver, R-T unit Deng.Optionally, the device in Transmit-Receive Unit 101 for realizing receive capabilities can be considered as receiving unit, by Transmit-Receive Unit 101 In for realizing the device of sending function be considered as transmission unit, i.e., Transmit-Receive Unit 101 includes receiving unit and transmission unit example Property, receiving unit is referred to as receiver, receiver, receives circuit etc., transmission unit is properly termed as transmitter, transmitter Or transmit circuit etc..

Figure 16 is please referred to, Figure 16 is a kind of structural schematic diagram of the network equipment provided by the embodiments of the present application, such as can be The structural schematic diagram of base station or other access points.As shown in figure 16.The network equipment can be the first equipment in the above method, Such as access point AP101 in system as shown in Figure 2.The network equipment may include one or more radio circuits, such as distal end Radio circuit 1040 and one or more baseband circuits (alternatively referred to as digital units, digital unit, DU) 1030.It is described to penetrate Frequency circuit 1040 is properly termed as Transmit-Receive Unit, transceiver, transmission circuit or transceiver etc., may include at least one Antenna 1050 and radio circuit 1040.1040 part of radio circuit is mainly used for the transmitting-receiving and radiofrequency signal of radiofrequency signal With the conversion of baseband signal, such as sending PPDU, first message, second message or third message etc..The baseband circuit 1030 parts are mainly used for carrying out Base-Band Processing.The radio circuit 1040 can be with baseband circuit 1030 to be physically located at Together, setting, i.e. distributed base station can also be physically separated.The baseband circuit 1030 is mainly used for completing at base band Function is managed, such as channel coding is multiplexed, modulation, spread spectrum etc..

In one example, the baseband circuit 1030 can be made of one or more veneers, and multiple veneers can be total to With the wireless access network (such as LTE net) for supporting single access standard, the wireless access of different access standards can also be supported respectively Net.The baseband circuit 1030 further includes memory 1020 and processor 1010.The memory 1020 is necessary to store Instruction and data.Such as memory 1020 stores the mapping relations etc. in above-described embodiment.The processor 1010 is for controlling The network equipment carries out necessary operation, such as sets for controlling in network equipment execution above method embodiment about network Standby operating process.The memory 1020 and processor 1010 can serve one or more veneers.That is, can be with Memory and processor is separately provided on each veneer.It is also possible to multiple veneers and shares identical memory and processor.This Necessary circuit is also provided on outer each veneer.

Wherein, above-mentioned each circuit or device can be connected by bus 1060.

It should be understood that in the embodiment of the present application, processor can be central processing unit (Central Processing Unit, referred to as " CPU "), which can also be other general processors, digital signal processor (DSP), dedicated integrated Circuit (ASIC), ready-made programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic Device, discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional place Manage device etc..

The memory may include read-only memory and random access memory, and provide instruction and data to processor. The a part of of memory can also include nonvolatile RAM.

The bus system can also include that power bus, control bus and status signal are total in addition to including data/address bus Line etc..But for the sake of clear explanation, various buses are all designated as bus system in figure.

During realization, each step of the above method can by the integrated logic circuit of the hardware in processor or The instruction of software form is completed.The step of method in conjunction with disclosed in the embodiment of the present application, can be embodied directly in hardware processor Execute completion, or in processor hardware and software module combination execute completion.Software module can be located at random storage Device, flash memory, read-only memory, this fields such as programmable read only memory or electrically erasable programmable memory, register at In ripe storage medium.The storage medium is located at memory, and processor reads the information in memory, completes in conjunction with its hardware The step of stating method.To avoid repeating, it is not detailed herein.

According to method provided by the embodiments of the present application, the embodiment of the present application also provides a kind of communication system comprising aforementioned One or more than one network equipment and one or more than one terminal device.

Device involved in the embodiment of the present application can also be generic processing system, such as be commonly referred to as chip, the general procedure System includes: to provide the one or more microprocessors of processor function；And provide at least part of outer of storage medium Portion's memory, it is all these all to be linked together by external bus architecture and other support circuits.

It should also be understood that first, second, third, fourth and the various digital numbers that are referred to herein are only for convenience of description The differentiation of progress is not intended to limit the invention the range of embodiment.

It should be understood that magnitude of the sequence numbers of the above procedures are not meant to execute suitable in the various embodiments of the application Sequence it is successive, the execution of each process sequence should be determined by its function and internal logic, the implementation without coping with the embodiment of the present invention Process constitutes any restriction.

Those of ordinary skill in the art may be aware that described in conjunction with the examples disclosed in this document various illustrative Logical block (illustrative logical block) and step (step), can be with electronic hardware or computer software Combination with electronic hardware is realized.These functions are implemented in hardware or software actually, depending on technical solution Specific application and design constraint.Professional technician can to each specific application come using distinct methods to realize The function of description, but such implementation should not be considered as beyond the scope of the present invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, 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 systems, devices and methods, it can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit It closes or communicates to connect, can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.

In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program Product includes one or more computer instructions.When loading on computers and executing the computer program instructions, all or It partly generates according to process described herein or function.The computer can be general purpose computer, special purpose computer, meter Calculation machine network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or It is transmitted from a computer readable storage medium to another computer readable storage medium, for example, the computer instruction can To pass through wired (such as coaxial cable, optical fiber, digital subscriber from a web-site, computer, server or data center Line) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, server or data center into Row transmission.The computer readable storage medium can be any usable medium or include one that computer can access Or the data storage devices such as integrated server, data center of multiple usable mediums.The usable medium can be magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid State Disk) etc..

Claims

1. a kind of channel detection method characterized by comprising

First equipment generates physical layer protocol data unit PPDU, the PPDU include data field Jing Guo precoding and without Cross the long training field of precoding；

First equipment sends the PPDU, carries out channel according to the long training field at least one second equipment and estimates Meter.

2. the method according to claim 1, wherein the PPDU also includes instruction information, the instruction information It is used to indicate the target destination point progress the channel estimation whether long training field is used for data field in the PPDU；Or Whether person, the instruction information are used to indicate the intended recipient website of data field in the PPDU according to the long training field Carry out channel estimation.

3. according to the method described in claim 2, it is characterized in that, when the long training field is for data word in the PPDU When the target destination point of section carries out channel estimation, at least one described second equipment is contained in the intended recipient website； When the long training field be not used in data field in the PPDU target destination point carry out channel estimation when, it is described at least One the second equipment is not included in the intended recipient website.

4. method according to any one of claims 1 to 3, which is characterized in that first equipment send the PPDU it Before, the method also includes:

First equipment sends first message, and the first message includes first identifier information；

The first message is used to indicate at least one described second equipment indicated by the first identifier information according to Long training field carries out channel estimation.

5. method according to any one of claims 1 to 4, which is characterized in that the long training word without precoding Section is contained in the physical layer preamble of the PPDU.

6. according to the method described in claim 5, it is characterized in that, the PPDU also includes second identifier information,

The second identifier information is used to indicate at least one described second equipment feedback letter while PPDU transmission Second equipment of road information, the channel information are the second equipment indicated by the second identifier information according to the long training Field carries out channel estimation acquisition.

7. the method according to the description of claim 7 is characterized in that the method also includes:

First equipment receives the channel information while PPDU is transmitted.

8. a kind of channel detection method characterized by comprising

Second equipment receives physical layer protocol data unit PPDU, the PPDU include data field Jing Guo precoding and without Cross the long training field of precoding；

Second equipment carries out channel estimation according to the long training field.

9. according to the method described in claim 8, it is characterized in that, the PPDU also includes instruction information, the instruction information It is used to indicate the target destination point progress the channel estimation whether long training field is used for data field in the PPDU；Or Whether person, the instruction information are used to indicate the intended recipient website of data field in the PPDU according to the long training field Carry out channel estimation.

10. according to the method described in claim 9, it is characterized in that, second equipment the instruction information indicate described in Target destination point of the long training field for data field in the PPDU carries out channel estimation and second equipment includes When in the intended recipient website, channel estimation is carried out according to the long training field；And it is indicated in the instruction information The target destination point that the long training field is not used in data field in the PPDU carries out channel estimation and described second sets For when being not included in the intended recipient website, channel estimation is carried out according to the long training field.

11. according to the described in any item methods of claim 8 to 10, which is characterized in that the method also includes:

Second equipment receives first message, and the first message includes first identifier information, and the first identifier information is used In the equipment that instruction carries out channel estimation according to the long training sequence；

Second equipment carries out channel estimation according to the long training field, comprising:

When second equipment is contained in equipment indicated by the first identifier information, carried out according to the long training field Channel estimation.

12. method according to any one of claims 8 to 11, which is characterized in that described to be trained without the long of precoding Field is contained in the physical layer preamble of the PPDU.

13. according to the method for claim 12, which is characterized in that the PPDU also includes second identifier information,

The equipment that the second identifier information is used to indicate feedback channel information while PPDU transmission, the channel letter Breath is equipment indicated by the second identifier information according to long training field progress channel estimation acquisition.

14. according to the method for claim 13, which is characterized in that when second equipment is contained in the second identifier letter When in the indicated equipment of breath, the method also includes:

Second equipment sends channel information while receiving the PPDU, and the channel information is the second equipment root Channel estimation acquisition is carried out according to the long training field.

15. a kind of channel detection device characterized by comprising

Processing module, for generating physical layer protocol data unit PPDU, the PPDU includes the data field Jing Guo precoding With the long training field without precoding；

Communication module carries out channel according to the long training field at least one second equipment for sending the PPDU Estimation.

16. device according to claim 15, which is characterized in that the PPDU also includes instruction information, the instruction letter Breath is used to indicate the target destination point progress the channel estimation whether long training field is used for data field in the PPDU； Alternatively, whether the instruction information is used to indicate the intended recipient website of data field in the PPDU according to the long training word Duan Jinhang channel estimation.

17. device according to claim 16, which is characterized in that when the long training field is for data in the PPDU When the target destination point of field carries out channel estimation, at least one described second equipment is contained in the intended recipient website In；It is described when the target destination point that the long training field is not used in data field in the PPDU carries out channel estimation At least one second equipment is not included in the intended recipient website.

18. 5 to 17 described in any item devices according to claim 1, which is characterized in that the communication module sends the PPDU Before, it is also used to send first message, the first message includes first identifier information；

19. 5 to 18 described in any item devices according to claim 1, which is characterized in that described to be trained without the long of precoding Field is contained in the physical layer preamble of the PPDU.

20. device according to claim 19, which is characterized in that the PPDU also includes second identifier information,

21. device according to claim 20, which is characterized in that the communication module was also used to transmit in the PPDU The channel information is received simultaneously.

22. a kind of channel detection device, which is characterized in that the channel detection device is arranged in the second equipment, the channel Detection device includes:

Communication module, for receiving physical layer protocol data unit PPDU, the PPDU includes the data field Jing Guo precoding With the long training field without precoding；

Processing module, for carrying out channel estimation according to the long training field.

23. device according to claim 22, which is characterized in that the PPDU also includes instruction information, the instruction letter Breath is used to indicate the target destination point progress the channel estimation whether long training field is used for data field in the PPDU； Alternatively, whether the instruction information is used to indicate the intended recipient website of data field in the PPDU according to the long training word Duan Jinhang channel estimation.

24. device according to claim 23, which is characterized in that the processing module is specifically used in the instruction information It indicates when the long training field carries out channel estimation for the target destination point of data field in the PPDU and described the When two equipment are contained in the intended recipient website, channel estimation is carried out according to the long training field；And in the finger When showing that information indicates that the long training field is not used in the target destination point progress channel estimation of data field in the PPDU And second equipment carries out channel estimation according to the long training field when being not included in the intended recipient website.

25. according to the described in any item devices of claim 22 to 24, which is characterized in that the communication module is also used to receive One message, the first message include first identifier information, and the first identifier information is used to indicate according to the long training word The equipment of Duan Jinhang channel estimation；

The processing module is specifically used for when in equipment indicated by second equipment is contained in the first identifier information, Channel estimation is carried out according to the long training field.

26. according to the described in any item devices of claim 22 to 25, which is characterized in that described to be trained without the long of precoding Field is contained in the physical layer preamble of the PPDU.

27. device according to claim 26, which is characterized in that the PPDU also includes second identifier information,

28. device according to claim 27, which is characterized in that the communication module is also used to when the second equipment packet When contained in equipment indicated by the second identifier information, channel information, the letter are sent while receiving the PPDU Road information is the processing module according to long training field progress channel estimation acquisition.