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CN103001681B - Detection method, detection system and detection equipment - Google Patents

Detection method, detection system and detection equipment Download PDF

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Publication number
CN103001681B
CN103001681B CN201110271891.0A CN201110271891A CN103001681B CN 103001681 B CN103001681 B CN 103001681B CN 201110271891 A CN201110271891 A CN 201110271891A CN 103001681 B CN103001681 B CN 103001681B
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beamforming
aid
information field
frame
receiving
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CN103001681A (en
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刘孟红
夏林峰
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

An embodiment of the invention discloses a detection method, a detection system and detection equipment which are applied to the technical field of communication. The detection method includes that detection for fields containing power-saving flags is omitted after a beamformee receives an NDP (null data packet) frame, so that the beamformee cannot enter a sleep state, and computed channel feedback information can be fed to a beamformer within the duration of a transmit opportunity. The detection method, the detection system and the detection equipment have the advantages that the beamformer and the beamformee do not need to carry out operation for the fields containing the power-saving flags in the NDP frame, in other words, the purpose of normal feedback can be achieved without cooperation of the beamformer and the beamformee, and accordingly a detection process is simplified.

Description

A kind of detection method, system and equipment
Technical field
The present invention relates to communication technical field, particularly detection method, system and equipment.
Background technology
802.11 is WLAN standard that IEEE group formulates, wherein use medium education (Medium access control, MAC) layer is that multiple websites in same network set up addressing and channel access controlling mechanism, makes the communication between multi-site become possibility.
The complementary agreement IEEE802.11ac of this standard has also formulated high-throughput detection mechanism (VHT Sounding Protocol) in WLAN (wireless local area network), namely the channel detecting mechanism between beam forming initiating equipment (Beamformer) and beam forming receiving equipment (Beamformee), by this mechanism, beam forming initiating equipment better can know the channel situation between beam forming receiving equipment, thus reaches by adjustment relevant parameter the object improving communication conditions.Particularly, realized by following process:
At transmission opportunity (Transmit opportunity, TXOP) in time, beam forming initiating equipment can send empty bag notice (Null Data Packet Announcement, NDPA) frame gives all relevant beam forming receiving equipments, to notify that beam forming receiving equipment is carried out detection and prepared;
Then beam forming initiating equipment can send empty bag (Null Data Packet, NDP) frame, after all relevant beam forming receiving equipments receive this NDP frame, all can calculate relevant channel feedback information, and feed back.Wherein at multi-user's multiple-input, multiple-output (Multi-user multiple input multiple output, MU-MIMO) under scene, some beam forming receiving equipment just feeds back receiving NDP frame, and some beam forming receiving equipment feeds back after the beam forming report queries (Beamforming Repot Poll) sent at subsequently received beam forming initiating equipment.
In existing high-throughput detection process, beam forming initiating equipment can comprise power saving flag bit (TXOP_PS_NOT_ALLOWED) field in the NDP frame sent, and beam forming receiving equipment is after receiving this NDP frame, this power saving flag bit field can be detected, if the value of this field is 0, then beam forming recipient just enters sleep state and can not feed back, if the value of this field is 1, then beam forming recipient would not enter sleep state.In above-mentioned existing process, the setting of power saving flag bit field must be carried out in beam forming promoter one end, and carry out the detection of this field in beam forming recipient one end, make testing process more loaded down with trivial details.
Summary of the invention
The embodiment of the present invention provides a kind of detection method, system and equipment, beam forming initiating equipment and receiving equipment can not be needed to carry out the power saving flag bit field in NDP frame processing the object that just can reach Normal Feedback, simplify detection flow process.
The embodiment of the present invention provides a kind of detection method, comprising:
The sky bag NDP frame that beam forming receiving equipment received beam shaping initiating equipment sends, ignores the detection to the power saving flag bit field comprised in described NDP frame;
Within the transmission opportunity TXOP time, the channel feedback information calculated according to described NDP frame is fed back to described beam forming initiating equipment by described beam forming receiving equipment.
The embodiment of the present invention provides a kind of beam forming receiving equipment, comprising:
Empty bag receiving element, for the sky bag NDP frame that received beam shaping initiating equipment sends, ignores the detection to the power saving flag bit field comprised in described NDP frame;
Feedback unit, within the transmission opportunity TXOP time, feeds back to described beam forming initiating equipment by the channel feedback information calculated according to described NDP frame.
The embodiment of the present invention provides a kind of detection system, comprising: beam forming initiating equipment and at least one beam forming receiving equipment;
Described beam forming initiating equipment, for sending empty bag NDP frame;
Described beam forming receiving equipment, for receiving described sky bag NDP frame, ignores the detection to the power saving flag bit field comprised in described NDP frame; And within the transmission opportunity TXOP time, the channel feedback information calculated according to described NDP frame is fed back to described beam forming initiating equipment.
In the high-throughput detection method of the embodiment of the present invention, beam forming receiving equipment is after receiving NDP frame, ignore the detection to the power saving flag bit field wherein comprised, and within the transmission opportunity time, the channel feedback information of calculating is fed back to beam forming initiating equipment by beam forming receiving equipment.The method of the embodiment of the present invention does not need beam forming initiating equipment and receiving equipment to the operation of the power saving flag bit field in NDP frame, does not namely need the cooperation of these two equipment just can reach the object of Normal Feedback, thus simplifies detection flow process.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of a kind of detection method that the embodiment of the present invention provides;
Fig. 2 is the detection process carried out under MU-MIMO scene in the embodiment of the present invention;
Fig. 3 is the structural representation of NDPA frame in the embodiment of the present invention;
Fig. 4 is the detection process carried out under SU-MIMO scene in the embodiment of the present invention;
Fig. 5 is the wlan system structural representation that the method provided in the embodiment of the present invention is applied;
Fig. 6 is the detection method flow chart carried out under SU-MIMO scene in the embodiment of the present invention;
Fig. 7 is the detection method flow chart carried out under MU-MIMO scene in the embodiment of the present invention
Fig. 8 is the structural representation of a kind of beam forming initiating equipment that the embodiment of the present invention provides;
Fig. 9 is the structural representation of the another kind of beam forming initiating equipment that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of detection method, beam forming receiving equipment and the method performed by Beamformee, MU-MIMO and single user multiple-input, multiple-output (Single-user multipleinput multiple output can be applied to, SU-MIMO) under scene, the flow chart of the method as shown in Figure 1, comprising:
Step 101, the sky bag NDP frame that beam forming receiving equipment received beam shaping initiating equipment and Beamformer send, ignores the detection to the power saving flag bit field comprised in NDP frame.
Step 102, within the transmission opportunity TXOP time, the channel feedback information calculated according to NDP frame is fed back to beam forming initiating equipment by beam forming receiving equipment.
Be appreciated that the process that high-throughput detects is carried out within the TXOP time, during this period of time, exclusive media resource, can send single or multiple Frame.TXOP has the longest time limit, needs to compete to obtain after it terminates again.
(1) the high-throughput detection process carried out under MU-MIMO scene as shown in Figure 2
Within the TXOP time, beam forming initiating equipment first can broadcast a NDPA frame, to notify that the beam forming receiving equipment of being correlated with is carried out detection and prepared, wherein the form of this NDPA frame as shown in Figure 3, comprise: frame control, duration, receiver address (RA), transmission address (TA), detection (Sounding) sequence, multiple site information (STA Information, STA Info) and Frame Check Sequence (Frame CheckSequence, FCS).Wherein detection sequence field comprises again sequence number and reserved field; Comprise again and connect ID (AID), distinguish feedback kind (Feedback Type) and feedback dimension (NC Index) field of feedback scene in site information; And under MU-MIMO scene, what destination address field was filled is broadcast address, and feedback kind is all set to 1, feedback dimension is set to the spatial stream number needing feedback.
Each beam forming receiving equipment is after receiving NDPA frame, can check whether the AID in the station information fields that wherein comprises has consistent with the AID of oneself, namely refer to identical, if find the AID identical with this beam forming receiving equipment, stop searching, and according to corresponding feedback type field and feedback dimension field, in detection process subsequently, pass through high-throughput beam forming compressed package (VHT CompressedBeamforming) to beam forming initiating equipment feedback channel feedback information; If do not find consistent AID, then do not feed back.
Broadcasting short frame pitch (the Short Inter-Frame Space of NDPA frame, SIFS) after, beam forming initiating equipment can broadcast a NDP frame to detect, in NDP frame, contain the information such as power saving flag bit field, the value of this power saving flag bit field can not be filled.
After each relevant beam forming receiving equipment receives this NDP frame, ignore the detection to the power saving flag bit field wherein comprised, such beam forming receiving equipment would not enter sleep state, thus calculate relevant channel feedback information, and within the TXOP time, the channel feedback information of calculating is fed back to beam forming initiating equipment.When feeding back, only having the beam forming receiving equipment that the AID in first station information fields comprised in NDPA frame is consistent with self AID, just can carry out feedback channel feedback information receiving NDP frame; For other beam forming receiving equipments, only when receiving the beam forming report queries of the follow-up transmission of beam forming initiating equipment, the channel feedback information of just feedback calculating.
(2) the high-throughput detection process carried out under SU-MIMO scene as shown in Figure 4
High-throughput detection process under this scene and the process under MU-MIMO scene similar, unlike spatial flows all under SU-MIMO scene only for a beam forming receiving equipment, then beam forming initiating equipment only comprises a station information fields in the NDPA frame sent, and receiver address is unicast address, feedback kind is set to 0, and feedback dimension is set to retention (beam forming receiving equipment can select the spatial stream number returned voluntarily); After beam forming receiving equipment receives NDPA frame, carry out detection and prepare; And after the NDP frame receiving the transmission of beam forming initiating equipment, ignore the detection to the power saving flag bit field wherein comprised, thus can not sleep state be entered, calculate relevant channel feedback information and also feed back to beam forming initiating equipment.
It should be noted that, the channel feedback information that usual spatial flow is relevant mainly comprises average signal-to-noise ratio (Average SNR) information corresponding to each spatial flow (Space-Time Stream); V matrix (Feedback Matrix V) information; With signal to noise ratio difference (Delta SNR) information etc.After beam forming promoter receives these feedback informations, relevant Q operation matrix (SteeringMatrix Q) can be calculated according to these information (also may can consider the feedback information that other beam forming receiving equipments send), instruct follow-up transmitting-receiving work to improve the communication performance of whole system.
Visible, in the high-throughput detection method of the embodiment of the present invention, beam forming receiving equipment is after receiving NDP frame, ignore the detection to the power saving flag bit field wherein comprised, thus can not sleep state be entered, within the transmission opportunity time, the channel feedback information of calculating will be fed back to beam forming initiating equipment like this.The method of the embodiment of the present invention does not need beam forming initiating equipment and receiving equipment to the operation of the power saving flag bit field in NDP frame, does not namely need the cooperation of these two equipment just can reach the object of Normal Feedback, thus simplifies detection flow process.
The method of the embodiment of the present invention is described with a concrete application examples below, be particularly applicable in WLAN (wireless local area network) (WLAN) system as shown in Figure 5, comprise multiple Basic Service Set (BasicService Set within the system, BSS), comprise the website (Station, STA) of multiple association at BSS network, the central STA wherein with full-time administrative BSS is called access point (Access point, AP), other STA associates with AP.And multiple BSS Netcom crosses distributed system (Distribution System, DS) and is interconnected and can forms extended service set (Extended Service Set, ESS); If when AP lacks, STA also can ad-hoc network and mutually direct communication, and this network is independently BSS (IBSS), the BSS1 in such as Fig. 5.
In the present embodiment, AP is beam forming initiating equipment, and STA is beam forming receiving equipment, then the high-throughput detection method flow chart carried out under SU-MIMO scene as shown in Figure 6, comprising:
Step 201, AP sends NDPA frame, and the receiver address comprised in NDPA frame is the unicast address of STA, and has a station information fields, comprises AID, feedback kind and feedback dimension field at station information fields.
Step 202, after STA receives this NDPA frame, obtains the AID of the station information fields wherein comprised, and mates with the AID of this STA, if unanimously, then performs step 203, if inconsistent, then and process ends.
Step 203, the information such as the feedback kind in NDPA frame and feedback dimension are preserved by STA.
And after AP a period of time after have sent NDPA frame, sending NDP frame to carry out detection process, STA can detect whether receive this NDP frame, if received, then performs step 204, if do not received, then continues to detect whether receive NDP frame.
Step 204, STA ignores the detection to the power saving flag bit field comprised in NDP frame, does not enter sleep state, then within the TXOP time, by the channel feedback information calculated according to NDP frame, feed back to AP according to the feedback dimension of preserving in step 203 and feedback kind.
The high-throughput detection method flow chart carried out under MU-MIMO scene as shown in Figure 7, comprising:
Step 301, AP broadcasts NDPA frame, and the form of NDPA frame as shown in Figure 3, wherein includes multiple station information fields, comprises AID, feedback kind and feedback dimension field at each station information fields.
Step 302, after STA receives this NDPA frame, obtain the AID of first station information fields, and mate with the AID of this STA, if consistent, then perform step 303 and 304, if inconsistent, then obtain AID in the station information fields after first station information fields, and the AID of acquisition is mated with the AID of this STA, if find that the AID of the AID of all station information fields and this STA is inconsistent, then process ends, if afterwards have AID in a station information fields consistent with the AID of this STA, then perform step 303 and 304.
Step 303, the information such as the feedback kind in NDPA frame and feedback dimension are preserved by STA.
And after AP a period of time after broadcasting NDPA frame, broadcast NDP frame is to carry out detection process, STA can detect whether receive this NDP frame, if received, then performs step 304, if do not received, then continues to detect whether receive NDP frame.
Step 304, STA ignores the detection to the power saving flag bit field comprised in NDP frame, does not enter sleep state, and within the TXOP time, the channel feedback information that STA will calculate according to NDP frame, feeds back to AP according to the feedback dimension of preserving in step 303 and feedback kind.
Further, if when in AID and the NDPA frame of self, the AID of the first station information fields is consistent, the channel feedback information of calculating just can be fed back to AP by STA after receiving NDP frame; And in AID and the NDPA frame of self after first station information fields, when the AID of arbitrary station information fields is consistent, after the beam forming report queries receiving AP transmission, the channel feedback information of calculating can be fed back to AP.
It should be noted that, above-described embodiment is the network for there being BSS to form, and for non-BSS ad-hoc network, beam forming initiating equipment can be certain STA, and beam forming receiving equipment can be other STA.
The embodiment of the present invention also provides a kind of beam forming receiving equipment, such as, website in Fig. 5, and structural representation as shown in Figure 8, comprising:
Empty bag receiving element 10, for the sky bag NDP frame that received beam shaping initiating equipment sends, ignores the detection to the power saving flag bit field comprised in described NDP frame;
Feedback unit 20, within the transmission opportunity TXOP time, feeds back to described beam forming initiating equipment by the channel feedback information that the NDP frame received according to described empty bag receiving element 10 calculates.
In the equipment of the embodiment of the present invention, empty bag receiving element 10 is after receiving NDP frame, ignore the detection to the power saving flag bit field wherein comprised, thus can not sleep state be entered, the channel feedback information of calculating within the transmission opportunity time, will be fed back to beam forming initiating equipment by such feedback unit 20.Beam forming initiating equipment and receiving equipment so just can not be needed the operation of the power saving flag bit field in NDP frame, namely do not need the cooperation of these two equipment just can reach the object of Normal Feedback, thus simplify detection flow process.
Shown in figure 9, in a specific embodiment, beam forming receiving equipment, except comprising structure as shown in Figure 8, can also comprise and notify empty bag receiving element 30, report receiving element 40, first matching unit 50 and the second matching unit 60, wherein:
Notify empty bag receiving element 30, for receiving the sky bag notice NDPA frame that described beam forming initiating equipment sends;
Report receiving element 40, for receiving the beam forming report queries that described beam forming initiating equipment sends;
By described, first matching unit 50, for notifying that the AID in first station information fields comprised in the NDPA frame that control receiving element 30 receives mates with the AID of beam forming receiving equipment;
Second matching unit 60, for when the AID of the AID in first station information fields comprised in the NDPA frame that described first matching unit 50 mates and beam forming receiving equipment is inconsistent, obtain the AID in the station information fields after first station information fields, and the AID of acquisition is mated with the AID of described beam forming receiving equipment.
In the present embodiment, under MU-MIMO scene, after notifying that empty bag receiving element 30 receives NDPA frame, in this NDPA frame, comprise multiple station information fields, comprise in each station information fields and connect ID AID; AID in the station information fields of first wherein can mate with the AID of this equipment by the first matching unit 50, if consistent, then after empty bag receiving element 10 receives NDP frame, ignore the detection to power saving flag bit field wherein, calculate channel feedback information according to NDP frame, and by feedback unit 20, the channel feedback information of calculating is fed back to described beam forming initiating equipment;
If the result that the first matching unit 50 mates is that the AID of AID and this equipment in first station information fields is inconsistent, AID in the station information fields then obtaining after first station information fields by the second matching unit 50 also mates with the AID of this STA, if the result that the second matching unit 60 mates is that the AID in NDPA frame after the first station information fields in any one station information fields is consistent with the AID of this equipment, then after empty bag receiving element 10 receives NDP frame, ignore the detection to power saving flag bit field wherein, channel feedback information is calculated according to NDP frame, and after report receiving element 40 receives beam forming report queries, by feedback unit 20, the channel feedback information of calculating is fed back to described beam forming initiating equipment.
If under SU-MIMO scene, when notifying to comprise a station information fields in the NDPA frame that empty bag receiving element 30 receives, and in station information fields, comprise connection ID AID, AID in one of them station information fields can mate with the AID of this equipment by the first matching unit 50, if consistent, then after empty bag receiving element 10 receives NDP frame, ignore the detection to power saving flag bit field wherein, calculate channel feedback information according to NDP frame, and by feedback unit 20, the channel feedback information of calculating is fed back to described beam forming initiating equipment.
The embodiment of the present invention also provides a kind of detection system, comprising: beam forming initiating equipment and at least one beam forming receiving equipment, wherein:
Beam forming initiating equipment, for sending empty bag NDP frame;
Beam forming receiving equipment, for receiving described sky bag NDP frame, ignores the detection to the power saving flag bit field comprised in described NDP frame; And within the transmission opportunity TXOP time, the channel feedback information calculated according to described NDP frame is fed back to described beam forming initiating equipment.
Wherein the structure of beam forming receiving equipment as shown in Fig. 8 or Fig. 9, can not repeat at this.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is that the hardware that can carry out instruction relevant by program has come, this program can be stored in a computer-readable recording medium, and storage medium can comprise: read-only memory (ROM), random access memory (RAM), disk or CD etc.
Above to detection method, system and equipment that the embodiment of the present invention provides, be described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (12)

1.一种探测方法，其特征在于，包括：1. A detection method, characterized in that, comprising: 波束成形接收设备接收波束成形发起设备发送的空包通知NDPA帧，所述NDPA帧中包含至少一个站点信息字段，每个站点信息字段中包含连接身份号AID；The beamforming receiving device receives the empty packet notification NDPA frame sent by the beamforming initiating device, and the NDPA frame includes at least one site information field, and each site information field includes a connection identity number AID; 若所述至少一个站点信息字段中的，一个站点信息字段中的连接身份号AID与波束成形接收设备的AID一致，则所述波束成形接收设备接收到所述波束成形发起设备发送的空包NDP帧后，忽略对所述NDP帧中包含的省电标志位字段的检测；If in the at least one site information field, the connection identity number AID in a site information field is consistent with the AID of the beamforming receiving device, the beamforming receiving device receives the empty packet NDP sent by the beamforming initiating device After the frame, ignore the detection of the power saving flag field contained in the NDP frame; 在传输机会TXOP时间内，所述波束成形接收设备将根据所述NDP帧计算的信道反馈信息反馈给所述波束成形发起设备。During the transmission opportunity TXOP time, the beamforming receiving device feeds back the channel feedback information calculated according to the NDP frame to the beamforming initiating device. 2.如权利要求1所述的方法，其特征在于，所述方法用于多用户多入多出MU-MIMO的场景下，所述NDPA帧中包含多个站点信息字段，每个站点信息字段中包含连接身份号AID；2. The method according to claim 1, wherein the method is used in a multi-user multiple-input multiple-output (MU-MIMO) scenario, and the NDPA frame includes a plurality of site information fields, and each site information field Contains the connection identity number AID; 若所述NDPA帧中包含的第一个站点信息字段中的连接身份号AID与波束成形接收设备的AID一致，则所述波束成形接收设备在接收到所述NDP帧后，将根据所述NDP帧计算的信道反馈信息反馈给所述波束成形发起设备。If the connection identity number AID in the first site information field contained in the NDPA frame is consistent with the AID of the beamforming receiving device, the beamforming receiving device will, after receiving the NDP frame, The channel feedback information of the frame calculation is fed back to the beamforming initiating device. 3.如权利要求2所述的方法，其特征在于，若所述NDPA帧中包含的第一个站点信息字段中的AID与波束成形接收设备的AID不一致时，3. The method according to claim 2, wherein if the AID in the first site information field contained in the NDPA frame is inconsistent with the AID of the beamforming receiving device, 获取第一个站点信息字段之后的站点信息字段中的AID，并将获取的AID与所述波束成形接收设备的AID进行匹配，当之后任一个站点信息字段中的AID与所述波束成形接收设备的AID一致，所述波束成形接收设备在接收到所述NDP帧后，将根据所述NDP帧计算的信道反馈信息反馈给所述波束成形发起设备。Obtain the AID in the site information field after the first site information field, and match the acquired AID with the AID of the beamforming receiving device, and when the AID in any subsequent site information field matches the beamforming receiving device The AIDs are consistent, and after receiving the NDP frame, the beamforming receiving device feeds back the channel feedback information calculated according to the NDP frame to the beamforming initiating device. 4.如权利要求3所述的方法，其特征在于，将所述信道反馈信息反馈给所述波束成形发起设备之前还包括：4. The method according to claim 3, further comprising: before feeding back the channel feedback information to the beamforming initiating device: 接收所述波束成形发起设备发送的波束成形报告查询。receiving a beamforming report query sent by the beamforming initiating device. 5.如权利要求1至4任一项所述的方法，其特征在于，所述方法用于单用户多入多出SU-MIMO的场景下，所述NDPA帧中包含一个站点信息字段，所述站点信息字段中包含连接身份号AID；5. The method according to any one of claims 1 to 4, wherein the method is used in a single-user multiple-input multiple-output SU-MIMO scenario, and the NDPA frame includes a site information field, so The above site information field contains the connection identity number AID; 若所述NDPA帧中包含的站点信息字段中的连接身份号AID与波束成形接收设备的AID一致，则所述波束成形接收设备在接收到所述NDP帧后，将根据所述NDP帧计算的信道反馈信息反馈给所述波束成形发起设备。If the connection identity number AID in the site information field contained in the NDPA frame is consistent with the AID of the beamforming receiving device, after receiving the NDP frame, the beamforming receiving device will calculate the AID based on the NDP frame The channel feedback information is fed back to the beamforming initiating device. 6.一种波束成形接收设备，其特征在于，包括：6. A beamforming receiving device, comprising: 通知空包接收单元，用于接收所述波束成形发起设备发送的空包通知NDPA帧，所述NDPA帧中包含至少一个站点信息字段，每个站点信息字段中包含连接身份号AID；Notify the empty packet receiving unit, configured to receive the empty packet notification NDPA frame sent by the beamforming initiating device, the NDPA frame includes at least one station information field, and each station information field includes a connection identity number AID; 空包接收单元，用于在所述至少一个站点信息字段中的，一个站点信息字段中的连接身份号AID与波束成形接收设备的AID一致时，接收波束成形发起设备发送的空包NDP帧，忽略对所述NDP帧中包含的省电标志位字段的检测；An empty packet receiving unit, configured to receive the empty packet NDP frame sent by the beamforming initiating device when the connection identity number AID in one of the station information fields in the at least one site information field is consistent with the AID of the beamforming receiving device, Ignoring the detection of the power saving flag field contained in the NDP frame; 反馈单元，用于在传输机会TXOP时间内，将根据所述NDP帧计算的信道反馈信息反馈给所述波束成形发起设备。The feedback unit is configured to feed back the channel feedback information calculated according to the NDP frame to the beamforming initiating device within the transmission opportunity TXOP time. 7.如权利要求6所述的设备，其特征在于，若所述通知空包接收单元接收到的所述NDPA帧中包含多个站点信息字段，每个站点信息字段中包含连接身份号AID时，所述设备还包括：7. The device according to claim 6, wherein if the NDPA frame received by the notification empty packet receiving unit includes a plurality of site information fields, each site information field includes a connection identity number AID , the device also includes: 第一匹配单元，用于将所述通知控制接收单元接收的NDPA帧中包含的第一个站点信息字段中的AID与波束成形接收设备的AID进行匹配；The first matching unit is configured to match the AID in the first site information field contained in the NDPA frame received by the notification control receiving unit with the AID of the beamforming receiving device; 所述反馈单元，用于当所述第一匹配单元匹配的NDPA帧中包含的第一个站点信息字段中的AID与波束成形接收设备的AID一致，则在所述空包接收单元接收到所述NDP帧后，将所述信道反馈信息反馈给所述波束成形发起设备。The feedback unit is configured to receive the empty packet receiving unit when the AID in the first site information field contained in the NDPA frame matched by the first matching unit is consistent with the AID of the beamforming receiving device. After receiving the NDP frame, feed back the channel feedback information to the beamforming initiating device. 8.如权利要求7所述的设备，其特征在于，还包括：第二匹配单元，用于当所述第一匹配单元匹配的NDPA帧中包含的第一个站点信息字段中的AID与波束成形接收设备的AID不一致时，获取第一个站点信息字段之后的站点信息字段中的AID，并将获取的AID与所述波束成形接收设备的AID进行匹配；8. The device according to claim 7, further comprising: a second matching unit, configured to match the AID and beam in the first site information field contained in the NDPA frame matched by the first matching unit When the AIDs of the forming receiving device are inconsistent, obtaining the AID in the site information field after the first site information field, and matching the acquired AID with the AID of the beamforming receiving device; 所述反馈单元，用于当所述第二匹配单元匹配的NDPA帧中第一站点信息字段之后任一个站点信息字段中的AID与所述波束成形接收设备的AID一致，则在所述空包接收单元接收到所述NDP帧后，将根据所述NDP帧计算的信道反馈信息反馈给所述波束成形发起设备。The feedback unit is configured to: when the AID in any station information field after the first station information field in the NDPA frame matched by the second matching unit is consistent with the AID of the beamforming receiving device, then in the empty packet After receiving the NDP frame, the receiving unit feeds back the channel feedback information calculated according to the NDP frame to the beamforming initiating device. 9.如权利要求8所述的设备，其特征在于，还包括：9. The device of claim 8, further comprising: 报告接收单元，用于接收所述波束成形发起设备发送的波束成形报告查询；a report receiving unit, configured to receive a beamforming report query sent by the beamforming initiating device; 所述反馈单元，用于当所述第二匹配单元匹配的NDPA帧中包含的第一个站点信息字段之后任一站点信息字段中的AID与波束成形接收设备的AID一致，则在所述报告接收单元接收到所述波束成形报告查询之后，将所述信道反馈信息反馈给所述波束成形发起设备。The feedback unit is configured to, when the AID in any station information field after the first station information field contained in the NDPA frame matched by the second matching unit is consistent with the AID of the beamforming receiving device, then in the report After receiving the beamforming report query, the receiving unit feeds back the channel feedback information to the beamforming initiating device. 10.如权利要求7所述的设备，其特征在于，若所述通知空包接收单元接收的空包通知NDPA帧中包含一个站点信息字段，所述站点信息字段中包含连接身份号AID；10. The device according to claim 7, wherein if the empty packet notification NDPA frame received by the notification empty packet receiving unit includes a station information field, the station information field includes a connection identity number AID; 所述第一匹配单元，还用于将所述一个站点信息字段中的AID与波束成形接收设备的AID进行匹配；The first matching unit is further configured to match the AID in the one site information field with the AID of the beamforming receiving device; 所述反馈单元，用于在所述第一匹配单元匹配的一个站点信息字段中的AID与波束成形接收设备的AID一致，则在所述空包接收单元接收到所述NDP帧后，将所述信道反馈信息反馈给所述波束成形发起设备。The feedback unit is configured to match the AID in a site information field matched by the first matching unit with the AID of the beamforming receiving device, then after the empty packet receiving unit receives the NDP frame, send the The channel feedback information is fed back to the beamforming initiating device. 11.一种探测系统，其特征在于，包括：波束成形发起设备和至少一个波束成形接收设备；11. A detection system, comprising: a beamforming initiating device and at least one beamforming receiving device; 所述波束成形发起设备，用于发送空包NDP帧，以及用于发送空包通知NDPA帧，所述NDPA帧中包含至少一个站点信息字段，每个站点信息字段中包含连接身份号AID；The beamforming initiating device is used to send an empty packet NDP frame, and to send an empty packet notification NDPA frame, the NDPA frame includes at least one site information field, and each site information field includes a connection identity number AID; 所述波束成形接收设备，用于接收所述空包通知NDPA帧，并当所述NDPA帧中包含的至少一个站点信息字段中的，一个站点信息字段中的连接身份号AID与波束成形接收设备的AID一致时，接收所述空包NDP帧，忽略对所述NDP帧中包含的省电标志位字段的检测；并在传输机会TXOP时间内，将根据所述NDP帧计算的信道反馈信息反馈给所述波束成形发起设备。The beamforming receiving device is configured to receive the empty packet notification NDPA frame, and when at least one site information field contained in the NDPA frame, the connection identity number AID in a site information field is related to the beamforming receiving device When the AIDs are consistent, receive the empty packet NDP frame, ignore the detection of the power saving flag field contained in the NDP frame; and feed back the channel feedback information calculated according to the NDP frame within the transmission opportunity TXOP time to the beamforming initiating device. 12.如权利要求11所述的系统，其特征在于，所述波束成形接收设备是如权利要求6至10任一项所述的设备。12. The system according to claim 11, wherein the beamforming receiving device is the device according to any one of claims 6 to 10.
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