CN110350959B

CN110350959B - Method, device and system for channel measurement and CSI feedback

Info

Publication number: CN110350959B
Application number: CN201910539401.7A
Authority: CN
Inventors: 张佳胤; 林英沛; 杨讯
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-10-11
Filing date: 2013-10-11
Publication date: 2021-12-03
Anticipated expiration: 2033-10-11
Also published as: CN110350959A; CN105393482A; WO2015051529A1

Abstract

The invention discloses a method, a device and a system for channel measurement and CSI feedback. Relates to the technical field of communication. The problem that a large amount of continuous air interface resources are occupied when a CSI flow is measured and fed back at one time, flexibility is low, and performance of a system is reduced is solved. The method of the invention specifically comprises the following steps: the method comprises the steps that a transmitting device broadcasts a training sequence used for channel measurement and an identifier of the transmitting device, so that a receiving device measures CSI of at least one designated device according to the training sequence and the identifier of the transmitting device, and the receiving device is a device which receives the training sequence and the identifier of the transmitting device; the transmitting device transmits the CSI feedback indication time to the receiving device, so that the receiving device transmits the measured CSI of the at least one designated device to the transmitting device at the CSI feedback indication time. The method can be applied to channel detection.

Description

Method, device and system for channel measurement and CSI feedback

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for channel measurement and channel state information CSI feedback.

Background

In a MIMO (Multiple Input Multiple Output) system, whenever a sending device sends data to a receiving device, the receiving device may combine data received via Multiple receiving antennas through a coherent receiving algorithm by using Channel State Information (CSI) obtained by Channel measurement, and suppress interference between spatial streams corresponding to the Multiple receiving antennas, thereby obtaining an array gain and a space division multiplexing gain, and further increasing a correct rate of the received data; in addition, the sending device may also obtain CSI, and the sending device may perform linear precoding processing according to the received CSI fed back by the receiving device, so that the accuracy of the data received by the receiving device is further increased.

The receiving device feeding back the CSI may include: the receiving device may obtain the CSI by detecting a Sounding PPDU (Physical Protocol Data Unit) sent by the sending device, and then actively feed back the CSI to the sending device through a special management frame for the sending device to perform beamforming (TxBF).

In the ieee802.11ac standard, MU-MIMO (Multiple User-MIMO, multi-User MIMO) is further introduced. In ieee802.11ac, a specific CSI measurement feedback procedure is shown in fig. 1, and may include: a transmitting device, such as a Beamformer, broadcasting VHT NDP notification (Very High Throughput NDPA (Null Data Packet notification), ultra High rate NDPA) to a specific receiving device, such as beamform 1/2/3, wherein the VHT NDPA may include information of the specific receiving device that needs to perform CSI measurement and CSI feedback; after an interval SIFS (Short inter frame space), the transmitting device broadcasts the NDP; appointing a receiving device to measure a channel CSI from a sending device to each receiving device according to a Long Training Field (LTF) contained in the received NDP; after NDP is finished and SIFS is spaced, one of the appointed receiving equipment feeds back the measured CSI; then, the transmitting device sequentially instructs the designated receiving device that does not feed back CSI through Beamforming Report Poll (Beamforming Report Poll) every SIFS.

In the channel detection process, the CSI measurement and the CSI feedback are bound, that is, the CSI feedback needs to be performed every time the receiving device measures the CSI, and a large amount of continuous air interface resources need to be occupied when a single measurement and CSI feedback process is completed, so that the flexibility is low, and the performance of the system is reduced.

Disclosure of Invention

Embodiments of the present invention provide a method, an apparatus, and a system for channel measurement and CSI feedback, which are used to complete a measurement and CSI feedback process at one time, and need to occupy continuous air interface resources, so that the flexibility is low, and the performance of the system is reduced.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, a method for channel measurement and CSI feedback is provided, including:

the method comprises the steps that a transmitting device broadcasts a training sequence used for channel measurement and an identification of the transmitting device, so that a receiving device measures CSI of at least one designated device according to the training sequence and the identification of the transmitting device, and the receiving device is a device which receives the training sequence and the identification of the transmitting device;

and the sending equipment sends the CSI feedback indication time to the receiving equipment, so that the receiving equipment sends the measured CSI of at least one piece of specified equipment to the sending equipment at the CSI feedback indication time.

In a second aspect, another method for channel measurement and CSI feedback is provided, including:

receiving a training sequence for channel measurement and an identification of a sending device, wherein the training sequence is broadcasted by the sending device;

measuring CSI of at least one designated device according to the training sequence and the identification of the transmitting device;

receiving CSI feedback indication time sent by the sending equipment;

transmitting the measured CSI of the at least one designated device to the transmitting device at the CSI feedback indication time.

In a third aspect, a transmitting device is provided, including:

a broadcasting unit, configured to broadcast a training sequence for channel measurement and an identifier of the sending device, so that a receiving device measures CSI of at least one specified device according to the training sequence and the identifier of the sending device, where the receiving device is a device that receives the training sequence and the identifier of the sending device;

a first sending unit, configured to send a CSI feedback indication time to the receiving device, so that the receiving device sends, to the sending device, the measured CSI of at least one specific device at the CSI feedback indication time.

In a fourth aspect, there is provided a receiving apparatus comprising:

a first receiving unit, configured to receive a training sequence for channel measurement and an identifier of a sending device, where the training sequence is broadcasted by the sending device;

a measurement unit, configured to measure CSI of at least one specific device according to the training sequence and the identifier of the sending device;

a second receiving unit, configured to receive CSI feedback indication time sent by the sending device;

a first sending unit, configured to send, to the sending device, the measured CSI of the at least one specific device at the CSI feedback indication time.

In a fifth aspect, a system for channel detection and CSI feedback is provided, including:

the receiving device is a device which receives the training sequence and the identifier of the transmitting device; transmitting a CSI feedback indication time to the receiving device;

the receiving device is configured to receive the training sequence broadcasted by the sending device and an identifier of the sending device; measuring CSI of at least one designated device according to the training sequence and the identification of the transmitting device; receiving the CSI feedback indication time sent by the sending equipment; transmitting the measured CSI of the at least one designated device to the transmitting device at the CSI feedback indication time.

According to the method, the device and the system for channel detection provided by the embodiment of the invention, after the scheme is adopted, the sending equipment broadcasts the training sequence for channel measurement and the identification of the sending equipment so that the receiving equipment measures the CSI of at least one specified equipment according to the training sequence and the identification of the sending equipment, and the receiving equipment is the equipment which receives the training sequence and the identification of the sending equipment; and the sending equipment sends the CSI feedback indication time to the receiving equipment, so that the receiving equipment sends the measured CSI of at least one piece of specified equipment to the sending equipment at the CSI feedback indication time. Compared with the prior art in which the feedback step is executed immediately after the measurement step is executed, that is, compared with the case in which the measurement step and the feedback step are executed in a bound manner, after the receiving device receives the training sequence and the identifier of the transmitting device and measures the CSI of the designated device, the CSI is transmitted to the transmitting device at the CSI feedback indication time, that is, the measurement step and the feedback step of the CSI are separated, so that a large amount of continuous air interface resources are not occupied at one time when the measurement step or the feedback step is executed, that is, the measurement step and the feedback step can be executed by using discontinuous air interface resources, thereby increasing the flexibility and further increasing the performance of the system.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a diagram of information interaction for channel detection in the prior art;

fig. 2 is a flowchart of a method for channel measurement and CSI feedback according to this embodiment;

fig. 3 is a flowchart of another method for channel measurement and CSI feedback according to this embodiment;

fig. 4 is a flowchart of another method for channel measurement and CSI feedback according to the present embodiment;

FIG. 5 is an information interaction diagram of the method for channel measurement and CSI feedback shown in FIG. 4;

FIG. 6 is a time domain flow diagram of broadcasting a first data packet;

FIG. 7 is a diagram of a frame structure of a first packet;

fig. 8 is a flowchart of another method for channel measurement and CSI feedback according to the present embodiment;

fig. 9 is an information interaction diagram of the method of channel measurement and CSI feedback shown in fig. 8;

FIG. 10 is a time domain flow diagram of a transmitting device transmitting a second data packet to a receiving device;

FIG. 11 is a diagram of a frame structure of a second packet;

FIG. 12 is a time domain flow chart for high accuracy feedback by a receiving device;

FIG. 13 is a time domain flow diagram of a receiving device performing low precision feedback;

fig. 14 is a schematic structural diagram of a sending device according to this embodiment;

fig. 15 is a schematic structural diagram of another sending device provided in this embodiment;

fig. 16 is a schematic structural diagram of a receiving device according to this embodiment;

fig. 17 is a schematic structural diagram of another receiving apparatus provided in this embodiment;

fig. 18 is a schematic structural diagram of a computer provided in this embodiment;

fig. 19 is a schematic structural diagram of a system for channel measurement and CSI feedback according to this embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to clearly describe the following embodiments, an application scenario of the embodiments is first briefly described.

The application scenario may include, but is not limited to:

in the process of communication between the sending device and the multiple receiving devices, the sending device may broadcast the first data packet periodically, for example, set an air interface time-frequency resource, and the time-frequency resource may be mainly used for the sending device to broadcast the first data packet. The receiving device may measure the CSI of the designated device according to the received first data packet, and may send the measured CSI to the communicable device at the CSI feedback indication time after receiving the CSI feedback indication time sent by the sending device.

In the channel detection process in the prior art, the CSI measurement and the CSI feedback are bound, that is, the CSI feedback needs to be performed every time the receiving device measures the CSI, and a large amount of continuous air interface resources need to be occupied to complete one measurement and feedback of the CSI process, so that the flexibility is low, and the performance of the system is reduced.

In order to solve the above problem, the present embodiment provides a method for channel measurement and CSI feedback, where an execution subject of the method may be a transmitting device, as shown in fig. 2, and the method may include:

201. the transmitting device broadcasts a training sequence for channel measurement and an identifier of the transmitting device, so that the receiving device measures the CSI of at least one designated device according to the training sequence and the identifier of the transmitting device, wherein the at least one designated device can be a device to be measured preset by the system.

Wherein, the receiving device may be a device that receives the training sequence and the identification of the transmitting device.

In the prior art, each time a sending device sends a training sequence and an identifier of the sending device to a receiving device, the receiving device may measure CSI of any specified device according to the training sequence and the identifier of the sending device, and perform CSI feedback immediately after the CSI is measured, which causes a problem that a large amount of continuous air interface resources are occupied by continuously performing CSI measurement and feedback. Therefore, in order to solve this problem, it is necessary to reduce the continuous air interface resources occupied when performing measurement and feedback of CSI. For example, but not limited to, the CSI measurement and the CSI feedback may be performed independently, that is, the CSI is not fed back immediately after the CSI measurement, so that continuous air interface resources occupied for a single time may be reduced.

In this embodiment, the method for broadcasting the training sequence for channel measurement and the identifier of the sending device by the sending device is not limited, and may be set according to actual needs, which is not described herein again.

202. And the sending equipment sends CSI feedback indication time to the receiving equipment, so that the receiving equipment sends the measured CSI of at least one piece of specified equipment to the sending equipment at the CSI feedback indication time.

Wherein, the CSI feedback indication time may be other times except for the time when the receiving device feeds back the CSI immediately after measuring the CSI.

If the receiving device finishes measuring CSI at 7 points, the CSI feedback indication time may be, but is not limited to: 7 point 01, 7 point 02, etc.

As an implementation manner of this embodiment, after the receiving device measures the corresponding CSI, the measured CSI is not fed back to the sending device immediately, and only after the receiving device receives the CSI feedback indication, the CSI obtained by the latest measurement is fed back to the sending device, so that the CSI measuring step and the CSI feedback step can be independent.

It should be noted that, in this embodiment, the receiving device may further send the CSI to other communicable devices outside the execution host in this embodiment, specifically, the other communicable devices are not limited to be a technology known by those skilled in the art, for example, any device having a sending function and/or a receiving function may be included, and specifically, but not limited to be set according to at least one specific device or according to actual needs, and details are not described herein again.

After the scheme is adopted, the sending equipment broadcasts the training sequence for channel measurement and the identification of the sending equipment so that the receiving equipment can measure the CSI of at least one specified equipment according to the training sequence and the identification of the sending equipment, and the receiving equipment is the equipment which receives the training sequence and the identification of the sending equipment; and the sending equipment sends the CSI feedback indication time to the receiving equipment, so that the receiving equipment sends the measured CSI of at least one piece of specified equipment to the sending equipment at the CSI feedback indication time. Compared with the prior art in which the feedback step is executed immediately after the measurement step is executed, that is, compared with the case in which the measurement step and the feedback step are executed in a bound manner, after the receiving device receives the training sequence and the identifier of the transmitting device and measures the CSI of the designated device, the CSI is transmitted to the transmitting device at the CSI feedback indication time, that is, the measurement step and the feedback step of the CSI are separated, so that a large amount of continuous air interface resources are not occupied at one time when the measurement step or the feedback step is executed, that is, the measurement step and the feedback step can be executed by using discontinuous air interface resources, thereby increasing the flexibility and further increasing the performance of the system.

The present embodiment provides another method for channel measurement and CSI feedback, where the method is a method on the opposite side of communication from the method shown in fig. 2, and the implementation subject is a receiving device, as shown in fig. 3, and the method may include:

301. the receiving device receives the training sequence for channel measurement and the identification of the transmitting device broadcast by the transmitting device.

302. And the receiving equipment measures the CSI of at least one specified equipment according to the training sequence and the identification of the transmitting equipment.

The method for the receiving device to measure the CSI of the specific device is not limited in this embodiment, and is a technique well known to those skilled in the art, and can be set according to actual needs, and will not be described herein again.

303. And the receiving equipment receives the CSI feedback indication time sent by the sending equipment.

In the prior art, each time a sending device broadcasts a training sequence and an identifier of the sending device to a receiving device, the receiving device may measure CSI of any specified device according to the training sequence and the identifier of the sending device, and perform CSI feedback immediately after the CSI is measured, which causes a problem that a large amount of continuous air interface resources are occupied by performing CSI measurement and feedback. Therefore, in order to solve this problem, it is necessary to reduce the continuous air interface resources occupied when performing measurement and feedback of CSI. For example, but not limited to, the CSI measurement and the CSI feedback may be performed independently, that is, the CSI is not fed back immediately after the CSI measurement, and the CSI is sent to the sending device only after the receiving device receives the CSI feedback indication time.

304. And the receiving equipment sends the measured CSI of at least one specified equipment to the sending equipment at the CSI feedback indication time.

The receiving device transmits the measured CSI of at least one designated device to the transmitting device or other communicable devices so that the transmitting device or other communicable devices can perform subsequent operations according to the corresponding CSI. Here, the communicable apparatus may be any one of the transmitting apparatus and the receiving apparatus.

After the scheme is adopted, the receiving equipment receives the training sequence for channel measurement and the identification of the sending equipment, which are broadcast by the sending equipment; measuring CSI of at least one designated device according to the training sequence and the identification of the transmitting device; receiving CSI feedback indication time sent by the sending equipment; transmitting the measured CSI of the at least one designated device to the transmitting device at the CSI feedback indication time. Compared with the prior art in which the feedback step is executed immediately after the measurement step is executed, that is, compared with the case in which the measurement step and the feedback step are executed in a bound manner, after the receiving device receives the training sequence and the identifier of the transmitting device and measures the CSI of the designated device, the CSI is transmitted to the transmitting device at the CSI feedback indication time, that is, the measurement step and the feedback step of the CSI are separated, so that a large amount of continuous air interface resources are not occupied at one time when the measurement step or the feedback step is executed, that is, the measurement step and the feedback step can be executed by using discontinuous air interface resources, thereby increasing the flexibility and further increasing the performance of the system.

The present embodiment provides still another method for channel measurement and CSI feedback, which is a further extension and optimization of the methods in fig. 2 and fig. 3, and the number of designated devices in the present embodiment is 1, that is, the receiving device only measures CSI of one designated device.

Fig. 4 is a flowchart of a method for channel detection provided in this embodiment, and fig. 5 is an information interaction diagram of the method for channel detection provided in this embodiment.

Specifically, as shown in fig. 4, the present embodiment may include the following steps:

401. the transmitting device broadcasts the first data packet periodically.

Wherein, the first data packet may include: training sequences for channel measurements and identification of the transmitting device. The receiving device may be a receiving device that receives the first data packet, and the receiving device may measure CSI of the specific device according to the received training sequence and the identifier of the transmitting device.

As an implementation manner of this embodiment, the sending device may broadcast the first data packet according to the inherent period, which specifically includes: the transmitting device may broadcast the first packet at the start position time of the inherent period and then broadcast the first packet according to the start position time of the inherent period and the time offset value, i.e., broadcast the first packet at the start position time of the inherent period plus an integer number of time offset values.

In this embodiment, the method for broadcasting the first data packet by the sending device is not limited, and may be set according to actual needs, which is not described herein again.

The period of broadcasting the first data packet may be, but is not limited to, determined by the channel environment where the transmitting device is located, for example, if the transmitting device is in an outdoor environment or a fast-changing environment, the period of broadcasting the first data packet is smaller, and vice versa.

The method for broadcasting the training sequence and the identifier of the sending device by the sending device in this embodiment is not limited, and may be set according to actual needs, for example, the broadcasting is performed in the form of a data packet in this embodiment, and other manners are not described herein again.

In the prior art, each time a sending device broadcasts a first data packet to a receiving device, the receiving device may measure CSI of any specified device according to a training sequence and an identifier of the sending device, and immediately perform CSI feedback after the CSI is measured, which causes a problem that a large amount of continuous air interface resources are occupied by continuously performing CSI measurement and feedback. Therefore, in order to solve this problem, it is necessary to reduce the continuous air interface resources occupied when performing measurement and feedback of CSI. For example, the measurement CSI and the feedback CSI may be performed independently, i.e., feedback is not performed immediately after the CSI is measured; the step of sending the data to be sent by the sending device may be independent from the step of broadcasting the first data packet, that is, the sending device broadcasts the first data packet after sending the data to be sent each time.

As an implementation manner of this embodiment, the CSI measurement period may be set to be greater than the period of broadcasting the first data packet by the transmitting device, so that CSI measurement is avoided once every time the first data packet is broadcasted.

In this embodiment, the value of the period for broadcasting the first data packet is not limited, and may be set according to actual needs, for example, 20ms, and the like, which is not described herein again.

A specific example is given below to briefly describe the first data packet broadcast by the sending device, and as shown in fig. 6, in a WLAN (Wireless Local Access Network) system, an AP (Access Point) is taken as the sending device, and an STA (station) is taken as the receiving device for example.

The AP a and the AP b periodically broadcast a first data Packet, where the first data Packet may be an SP (Sounding Packet), that is, an SPa, an SPb, and for SPs of different APs, the receiving device may distinguish the SPs from specific data fields in the SPs. The AP and the STA may also perform normal communication using a CSMA/CA (Carrier sensing multiple access/collision avoidance) mechanism during the broadcast period interval of the SP. If the time-frequency air interface resource for sending the SP is occupied by other data transmission according to the original sending period, for example, the sending position of the third SP of the APa is occupied by the data packet of the APb, then after the sending of the data packet of the APb is completed and a PIFS (PCF inter frame space ) (Point Coordination Function) is separated, the APa sends the corresponding SP, wherein the DIFS is a DCF inter frame space (Distribution Coordination Function).

402. The receiving device receives a first data packet broadcast by the transmitting device.

As an implementation manner of this embodiment, the first data packet may further include other information. For example, the first packet will be described as SP. Fig. 7 is a schematic diagram of a frame structure of an SP. In the figure, the "SU NSTS" identifier is used in the VHT-SIG-a, and may be used to identify the number of subsequent VHT-LTFs, and may also be used to inform the STA that the SP may measure channel information of several space-time streams, that is, the number of space-time streams to be detected. The STA may learn which AP the SP transmits, i.e. the identifier of the transmitting device, by parsing the "Partial BSSID" field, specifically, the STA may directly intercept the last 9 bits of the BSSID, or may calculate from the BSSID by using a specific mathematical formula. The "Sounding Packet" field may be used to identify whether the frame is an SP or other frame.

In this embodiment, the method for obtaining the identifier of the AP sending the SP by analyzing the "Partial BSSID" field and the specific mathematical formula are not limited, and are techniques well known to those skilled in the art, and may be set according to actual needs, and are not described herein again.

It should be noted that, the sending device may not periodically broadcast the first packet, but after the sending device completes the configuration of the first packet, the sending device only needs to reconfigure and send the first packet again when the channel measurement state of the designated device changes, and does not need to configure and send the first packet when the channel measurement state of the designated device does not change, so that network air interface resources are saved.

403. The transmitting device transmits the second data packet to the receiving device.

Wherein the second data packet may include, but is not limited to: the identifier and the configuration domain information of the designated device, so that the receiving device can measure the CSI of the device corresponding to the identifier of the designated device according to the first data packet, the identifier of the designated device and the configuration domain information.

Further, the configuration domain information may include: the time offset value of the time for broadcasting the first data packet next time relative to the inherent period starting position of the base station to which the sending device belongs is used, so that the receiving device is in an on state at the time for broadcasting the first data packet next time according to the time offset value, that is, the receiving device can be in an on state only at the time for broadcasting the first data packet next time according to the time offset value, and is in a dormant state at other times, and thus, time-frequency resources can be saved. The inherent period may be a preset period, and the specific function has been described in step 401 for simplicity, which is not described herein again.

As an implementation manner of this embodiment, before the receiving device measures the CSI of the specific device according to the training sequence and the identifier of the sending device, the sending device may configure the specific device corresponding to the CSI that needs to be measured by each receiving device, and add the determined identifier of the specific device to the second data packet and then send the second data packet to the receiving device, so that the receiving device measures the CSI of the device corresponding to the identifier of the specific device.

The method for sending the identifier of the designated device by the sending device in this embodiment is not limited, and may be set according to actual needs, for example, the identifier is sent in the form of a data packet in this embodiment, and other manners are not described herein again.

As an implementation manner of this embodiment, if the sending device needs to reconfigure the second packet, after the second packet is configured, the second packet configured last time may be updated to the second packet configured last time.

404. And the receiving equipment receives the second data packet sent by the sending equipment.

405. And the receiving equipment measures the CSI of the specified equipment according to the training sequence and the identification of the sending equipment.

As an implementation manner of this embodiment, the training sequence may include: short training sequences, long training sequences, pilot, etc.

Further, the receiving device may, but is not limited to, measure the CSI according to the measurement period, or the receiving device may also, but is not limited to, receive a first data packet broadcast by the transmitting device according to the measurement period, and may measure the CSI immediately after receiving the first data packet.

As an implementation manner of this embodiment, the measuring, by the receiving device, the CSI of the specific device according to the training sequence and the identifier of the transmitting device may include:

the receiving device may first obtain the identifier of the specified device from the second data packet; and then, measuring the CSI of the specified equipment according to the training sequence and the identification of the sending equipment.

406. And the sending equipment sends CSI feedback indication time to the receiving equipment, so that the receiving equipment sends the measured CSI of the specified equipment to the sending equipment at the CSI feedback indication time.

In this embodiment, a method for sending the CSI feedback indication time by the sending device is not limited, and may be set according to actual needs, for example, the sending device may add the CSI feedback indication time to a data packet and send the CSI feedback indication time to the receiving device, or may be in other manners, and details are not described herein.

As an implementation manner of this embodiment, after the receiving device measures the corresponding CSI, the measured CSI is not fed back to the sending device immediately, but the CSI is fed back to the sending device only after the CSI feedback indication time is received, so that the CSI measuring step and the CSI feedback step are independent.

As an implementation manner of this embodiment, the receiving device may feed back the CSI when the transmitting device has data to issue and needs the CSI for beamforming, or feed back the CSI when the CSI measured by the receiving device changes and needs to be updated to the transmitting device.

As an implementation manner of this embodiment, in order to reduce the empty resources occupied by performing CSI feedback, the receiving device may not perform feedback after performing CSI measurement each time, or may perform CSI feedback after performing at least two CSI measurement steps.

As a preferred implementation manner of this embodiment, the time interval of the adjacent CSI feedback indication times may be greater than the period of broadcasting the first data packet by the transmitting device.

407. And the receiving equipment receives the CSI feedback indication time sent by the sending equipment.

408. And the receiving equipment sends the CSI to the sending equipment at the CSI feedback indication time.

409. And the transmitting equipment receives the CSI transmitted by the receiving equipment.

After the scheme is adopted, the sending equipment broadcasts the training sequence for channel measurement and the identification of the sending equipment so that the receiving equipment measures the CSI of the appointed equipment according to the training sequence and the identification of the sending equipment, and the receiving equipment is the equipment which receives the training sequence and the identification of the sending equipment; and the sending equipment sends the CSI feedback indication time to the receiving equipment so that the receiving equipment sends the measured CSI of the specified equipment to the sending equipment at the CSI feedback indication time. Compared with the prior art that the feedback step is executed immediately after the measurement step is executed, namely the measurement step and the feedback step are bound together, after the receiving equipment receives the training sequence and the identifier of the sending equipment and measures the CSI of the specified equipment, the CSI is sent to the sending equipment at the CSI feedback indication time, namely the measurement step and the feedback step of the CSI are independently separated, so that a large amount of continuous air interface resources are not occupied at one time when the measurement step or the feedback step is executed, namely the measurement step and the feedback step can be executed by using discontinuous air interface resources, the flexibility is increased, and the performance of the system is improved; in addition, after the sending device completes configuration of the first data packet, the sending device only needs to re-configure the first data packet when the channel measurement state of the designated device changes, thereby avoiding frequent configuration of the first data packet and saving air interface resources.

In the prior art, when a user needs to perform channel detection frequently, data interaction between a sending device and a receiving device occupies a large amount of air interface resources. Since each receiving device can only communicate with a transmitting device with which association and authentication (authentication) has been performed, the receiving device cannot implement joint channel detection, that is, the receiving device cannot measure and feed back CSI of a plurality of designated devices.

In order to solve the above problems and the problems described in the background art at the same time, the present embodiment provides another method for channel measurement and CSI feedback, which is a further extension and optimization of the methods shown in fig. 2 and 3; and in this embodiment, the number of the specified devices is at least two.

Fig. 8 is a flowchart of a method for channel detection according to this embodiment, and fig. 9 is an information interaction diagram of the method for channel detection according to this embodiment.

Specifically, as shown in fig. 8, the present embodiment may include:

801. the transmitting device periodically broadcasts the first data packet so that the receiving device measures the CSI of the designated device based on the training sequence and the identity of the transmitting device.

In the prior art, each time a sending device broadcasts a first data packet to a receiving device, the receiving device may measure CSI of any specified device according to a training sequence and an identifier of the sending device, and perform CSI feedback immediately after the CSI is measured, which causes a problem that a large amount of continuous air interface resources are occupied by continuously performing CSI measurement and feedback. Therefore, in order to solve this problem, it is necessary to reduce the continuous air interface resources occupied when performing measurement and feedback of CSI. For example, the measurement CSI and the feedback CSI may be performed independently, i.e., feedback is not performed immediately after the CSI is measured; the step of the transmitting device transmitting the data to be transmitted may also be independent of the step of broadcasting the first data packet.

Specifically, the period for measuring CSI may be set to be greater than the period for the transmitting device to broadcast the first data packet, so that CSI measurement is avoided once every time one first data packet is broadcast.

In this embodiment, the value of the period for broadcasting the first data packet and the value of the period for measuring the CSI are not limited, and may be set according to actual needs, for example, may be 20ms, and are not described herein again.

802. The receiving device receives a first data packet periodically broadcast by the transmitting device.

In this embodiment, details of the specific frame structure of the first data packet are not repeated, and are already described in step 402.

803. The transmitting device transmits the second data packet to the receiving device.

The second data packet may include, but is not limited to: the identifier and the configuration domain information of the at least one designated device, so that the receiving device can measure the CSI of the device corresponding to the identifier of the at least one designated device according to the first data packet, the identifier of the at least one designated device and the configuration domain information.

Further, the configuration domain information may further include: first information, where the first information is used to characterize whether the at least one designated device is a first type device or a second type device, so that the receiving device sends the measured CSI of the at least one designated device to the sending device in different manners; the first type of device is a device performing data transmission with the receiving device and may be referred to as a signal device, and the second type of device is a device generating interference with the receiving device when transmitting signals with other devices except the receiving device and may be referred to as an interference device.

Further, if the number of the designated devices is at least two, the number of the configuration domain information is equal to the number of the at least one designated device and is in a one-to-one correspondence relationship, or the number of the configuration domain information is equal to the number of the designated device sets and is in a one-to-one correspondence relationship. Wherein the specified device set may be a device set composed of at least two devices.

Specifically, if the receiving device needs to measure the CSI of the specific device 1 and the specific device 2, the second data packet may include: a first packet configuration field 1 corresponding to the designated device 1, and a first packet configuration field 2 corresponding to the designated device 2.

The following describes the procedure of transmitting the second packet to the receiving device by the transmitting device, taking the AP as the transmitting device and the STA as the receiving device as an example.

As shown in fig. 10, after the STA accesses the AP, the AP may send the identifier of the configured designated AP of the STA to the STA through the second data packet in an idle time, that is, send the identifier of the configured designated device to the STA through the second data packet; the STA sends an ACK response to the AP after receiving the second data packet; when the AP needs to update the designated AP, the AP may further send a second data packet containing the updated designated AP to the STA again.

The present embodiment is not limited to the above-mentioned examples, and may be applied to other examples, which are not described herein again.

As an implementation manner of this embodiment, as shown in fig. 11, a Frame structure diagram is shown if the second packet is an SP, where the Frame structure is expanded on an existing 11-protocol function Frame (Action Frame), and an area with underlined characters is a newly defined data field, and the data field may be used to indicate a configuration of the SP. Wherein, the "3 Sounding Config" is used to indicate that the frame is an SP configuration frame; "Partial BSSID" is similar to the "Partial BSSID" data field in the frame structure of the SP shown in fig. 7; "Interference Indication" is used to indicate whether the AP sending the SP is a signal AP or an interfering AP; "SP Period" indicates the Period of transmitting SP.

When the STA needs to measure CSI of a plurality of designated APs, the SPs may include a plurality of "Sounding Packet Configuration" fields corresponding to the designated APs, that is, Configuration field information, to accommodate the Configuration information of each SP.

In this embodiment, the content included in the first data packet and the content included in the management frame are not limited, and may be set according to actual needs, which is not described herein again.

804. And the receiving equipment receives the second data packet sent by the sending equipment.

805. And the receiving equipment measures the CSI of at least one specified equipment according to the training sequence and the identification of the transmitting equipment.

In order to implement joint channel detection of at least two designated devices by the receiving device, the transmitting device needs to instruct the receiving device to measure CSI of at least two designated devices simultaneously.

806. And the sending equipment sends CSI feedback indication time to the receiving equipment, so that the receiving equipment sends the measured CSI of at least one piece of specified equipment to the sending equipment at the CSI feedback indication time.

807. And the receiving equipment receives the CSI feedback indication time sent by the sending equipment.

808. And the receiving equipment sends the measured CSI of at least one designated equipment to the sending equipment in different sending modes according to the first information at the CSI feedback indication time.

The first information is described in step 803, and is not described in detail here.

Further, if the CSI received by the sending device is the measured CSI of the first type of device, sending the measured CSI of the at least one designated device to the sending device at the CSI feedback indication time may include:

sending the measured CSI of the first type of equipment to the sending equipment in a high-precision sending mode at the CSI feedback indication time;

if the CSI received by the sending device is the measured CSI of the second type of device, sending the measured CSI of the at least one specific device to the sending device at the CSI feedback indication time may include:

and sending the measured CSI of the second type of equipment to the sending equipment by adopting a low-precision sending mode at the CSI feedback indication time. E.g. feeding back only the covariance matrix, etc.

Specifically, if the CSI received by the sending device is the measured CSI of the first type of device, a high-precision sending method needs to be used for feedback, and the method can be used for multi-access point joint sending or MU-MIMO.

For example, as shown in fig. 12, for STA2, APa and APb are both signal APs, so when STA2 receives a CSI feedback request from APb, STA a feeds back corresponding compressed CSI information according to the requirement of 11 ac. Since the existing compressed CSI information does not include the inter-AP amplitude and phase information, feedback including inter-AP channel association information may also be transmitted to the transmitting device.

The STA may obtain the inter-AP channel association information value according to, but not limited to, the following method:

v1 and V2 are right singular value matrices of channel matrices H1 and H2 from APa and APb to STA2, respectively, and H1 and H2 may be obtained according to the first data packet;

is a serial matrix [ H₁,H₂]A right singular value matrix of (a); matrix a is a diagonal matrix in which each non-zero diagonal element is the amplitude and phase difference of the corresponding spatial stream between signals AP.

In this embodiment, the method for acquiring the channel association information between the AP and the receiving device is not limited, and is a technique well known to those skilled in the art, and may be set according to actual needs, which is not described herein again.

Further, if the CSI received by the transmitting device is the measured CSI of the second type device, the transmitting device may perform a cooperative beamforming operation according to the received CSI.

If the CSI received by the transmitting device is the measured CSI of the second type of transmitting device, the accuracy requirement for the CSI is not very high, so the accuracy of the feedback thereof may be reduced. For example, CSI may be fed back for a wider frequency band, or channel statistics such as only the covariance matrix of interference may be fed back.

For example, as in fig. 13, APa is a signal AP for STA1, and therefore, compressed TxBF (Transmit Beamforming) may be fed back to APa at 11ac, while APb is an interfering AP for STA1, and therefore, only one summary CSI, such as a covariance matrix, may be fed back to APa.

In this embodiment, the method for sending CSI to the sending device by the receiving device at the CSI feedback indication time is not limited, and may be set according to actual needs, which is not described herein again.

809. And the transmitting equipment receives the CSI transmitted by the receiving equipment.

Further, if the CSI received by the transmitting device is the measured CSI of the first type of device, the transmitting device may perform a joint beamforming operation according to the received CSI.

Since the sending device needs to perform joint beamforming, the sending device also needs to receive second information sent by the receiving device, where the second information includes at least one of the following information: phase difference information between channel information between the first-class devices, and power difference information between channel information between the first-class devices; the transmitting device may perform joint beamforming according to the received CSI and at least one of the phase difference information and the power difference information.

In this embodiment, the method for the sending device to perform the cooperative beamforming operation according to the received CSI is not limited, and is a technique well known to those skilled in the art, and is not described herein again.

After the scheme is adopted, the sending equipment broadcasts the training sequence for channel measurement and the identification of the sending equipment so that the receiving equipment can measure the CSI of at least one specified equipment according to the training sequence and the identification of the sending equipment, and the receiving equipment is the equipment which receives the training sequence and the identification of the sending equipment; and the sending equipment sends the CSI feedback indication time to the receiving equipment, so that the receiving equipment sends the measured CSI of at least one piece of specified equipment to the sending equipment at the CSI feedback indication time. Compared with the prior art that the feedback step is executed immediately after the measurement step is executed, namely the measurement step and the feedback step are executed together, the receiving equipment measures the CSI of the appointed receiving equipment after receiving the first data packet, and sends the CSI to the sending equipment at the CSI feedback indication time, namely the measurement step and the feedback step of the CSI are independently separated, so that a large amount of continuous air interface resources are not occupied at one time when the measurement step or the feedback step is executed, namely the measurement step and the feedback step can be executed by using discontinuous air interface resources, the flexibility is increased, and the performance of the system is further increased; in addition, after the sending equipment completes the configuration of the first data packet, the sending equipment only needs to reconfigure the first data packet again when the channel measurement state of the specified equipment changes, thereby avoiding the frequent configuration of the first data packet and saving air interface resources; in this embodiment, by adding the first packet configuration field corresponding to the plurality of designated devices to the configuration second packet, the receiving device measures CSI of the plurality of designated devices.

In the following, embodiments of virtual devices are provided, which correspond to the respective method embodiments described above, respectively. The device embodiment can include: a transmitting device and a receiving device.

The present embodiment provides a transmitting apparatus, as shown in fig. 14, which may include:

a broadcasting unit 141, configured to broadcast a training sequence for channel measurement and an identifier of the sending device, so that a receiving device measures CSI of at least one specified device according to the training sequence and the identifier of the sending device, where the receiving device is a device that receives the training sequence and the identifier of the sending device;

a first sending unit 142, configured to send a CSI feedback indication time to the receiving device, so that the receiving device sends, to the sending device, the measured CSI of at least one specific device at the CSI feedback indication time.

The CSI feedback indication time may be other time than the time when the reception apparatus immediately feeds back the CSI after measuring the CSI.

After the scheme is adopted, the broadcasting unit is configured to broadcast a training sequence used for channel measurement and an identifier of the sending device, so that a receiving device measures CSI of at least one specified device according to the training sequence and the identifier of the sending device, and the receiving device is a device that receives the training sequence and the identifier of the sending device; a first sending unit, configured to send a CSI feedback indication time to the receiving device, so that the receiving device sends, to the sending device, the measured CSI of at least one specific device at the CSI feedback indication time. Compared with the prior art that the feedback step is executed immediately after the measurement step is executed, namely, compared with the case that the measurement step and the feedback step are executed in a bound mode, after the receiving equipment receives the first data packet to measure the CSI of the appointed receiving equipment, the CSI is sent to the sending equipment at the CSI feedback indication time, namely, the measurement step and the feedback step of the CSI are independent, so that a large amount of continuous air interface resources are not occupied at one time when the measurement step or the feedback step is executed, namely, the measurement step and the feedback step can be executed by using discontinuous air interface resources, the flexibility is increased, and the performance of the system is further increased.

This embodiment provides another sending device, which is a further extension and optimization of the sending device shown in fig. 14, as shown in fig. 15, and may include:

a broadcasting unit 151, configured to broadcast a training sequence for channel measurement and an identifier of the sending device, so that a receiving device measures CSI of at least one specified device according to the training sequence and the identifier of the sending device, where the receiving device is a device that receives the training sequence and the identifier of the sending device;

a first sending unit 152, configured to send the CSI feedback indication time to the receiving device, so that the receiving device sends the measured CSI of the at least one specific device to the sending device at the CSI feedback indication time.

Further, the sending device provided in this embodiment further includes:

a second sending unit 153, configured to send the identifier of the at least one designated device to the receiving device, so that the receiving device measures CSI of a device corresponding to the identifier of the at least one designated device according to the training sequence and the identifier of the sending device.

Further, the broadcasting unit 151 is specifically configured to broadcast a first data packet, where the first data packet includes: an identity of the training sequence and the transmitting device;

the second sending unit 153 is specifically configured to send a second data packet to the receiving device, where the second data packet includes: the identification and the configuration domain information of the at least one designated device, so that the receiving device measures the CSI of the device corresponding to the identification of the at least one designated device according to the first data packet, the identification of the at least one designated device and the configuration domain information;

the configuration domain information includes: and the time offset value of the next time of broadcasting the first data packet relative to the inherent period starting position of the base station to which the sending equipment belongs is used for enabling the receiving equipment to be in an on state at the next time of broadcasting the first data packet according to the time offset value.

Further, the configuration domain information further includes: first information, where the first information is used to characterize whether the at least one designated device is a first type device or a second type device, so that the receiving device sends the measured CSI of the at least one designated device to the sending device in different manners; the first type of device is a device for performing data transmission with the receiving device, and the second type of device is a device for generating interference with the receiving device when sending signals with other devices except the receiving device.

Further, the sending unit provided in this embodiment may further include:

a receiving unit 154, configured to receive second information sent by the receiving device if the received CSI is the measured CSI of the first type device, where the second information includes at least one of the following information: phase difference information between channel information between the first-class devices, and power difference information between channel information between the first-class devices;

a processing unit 155, configured to perform joint beamforming according to the received CSI and at least one of the phase difference information and the power difference information.

Further, if the number of the designated devices is at least two, the number of the configuration domain information is equal to the number of the at least one designated device and is in a one-to-one correspondence relationship, or the number of the configuration domain information is equal to the number of the designated device sets and is in a one-to-one correspondence relationship.

After the scheme is adopted, the broadcasting unit is configured to broadcast a training sequence used for channel measurement and an identifier of the sending device, so that a receiving device measures CSI of at least one specified device according to the training sequence and the identifier of the sending device, and the receiving device is a device that receives the training sequence and the identifier of the sending device; a first sending unit, configured to send a CSI feedback indication time to the receiving device, so that the receiving device sends, to the sending device, the measured CSI of at least one specific device at the CSI feedback indication time. Compared with the prior art that the feedback step is executed immediately after the measurement step is executed, namely the measurement step and the feedback step are executed together, the receiving equipment measures the CSI of the appointed receiving equipment after receiving the first data packet, and sends the CSI to the sending equipment at the CSI feedback indication time, namely the measurement step and the feedback step of the CSI are independently separated, so that a large amount of continuous air interface resources are not occupied at one time when the measurement step or the feedback step is executed, namely the measurement step and the feedback step can be executed by using discontinuous air interface resources, the flexibility is increased, and the performance of the system is further increased; in addition, after the sending equipment completes the configuration of the first data packet, the sending equipment only needs to reconfigure the first data packet again when the channel measurement state of the specified equipment changes, thereby avoiding the frequent configuration of the first data packet and saving air interface resources; in this embodiment, by adding the first packet configuration field corresponding to the plurality of designated devices to the configuration second packet, the receiving device measures CSI of the plurality of designated devices.

The present embodiment provides a receiving apparatus, as shown in fig. 16, which may include:

a first receiving unit 161, configured to receive a training sequence for channel measurement and an identifier of a sending device, which are broadcast by the sending device;

a measuring unit 162, configured to measure CSI of at least one specific device according to the training sequence and the identifier of the sending device;

a second receiving unit 163, configured to receive the CSI feedback indication time sent by the sending device;

a first sending unit 164, configured to send the measured CSI of the at least one specific device to the sending device at the CSI feedback indication time.

After the scheme is adopted, the first receiving unit is used for receiving the training sequence for channel measurement and the identifier of the sending equipment, which are broadcasted by the sending equipment; a measurement unit, configured to measure CSI of at least one specific device according to the training sequence and the identifier of the sending device; a second receiving unit, configured to receive CSI feedback indication time sent by the sending device; a first sending unit, configured to send, to the sending device, the measured CSI of the at least one specific device at the CSI feedback indication time. Compared with the prior art in which the feedback step is executed immediately after the measurement step is executed, that is, compared with the case in which the measurement step and the feedback step are executed in a bound manner, after the receiving device receives the training sequence and the identifier of the transmitting device and measures the CSI of the designated device, the CSI is transmitted to the transmitting device at the CSI feedback indication time, that is, the measurement step and the feedback step of the CSI are separated, so that a large amount of continuous air interface resources are not occupied at one time when the measurement step or the feedback step is executed, that is, the measurement step and the feedback step can be executed by using discontinuous air interface resources, thereby increasing the flexibility and further increasing the performance of the system.

This embodiment provides another receiving apparatus, which is a further extension of the receiving apparatus shown in fig. 16, and as shown in fig. 17, the receiving apparatus may include:

a first receiving unit 171, configured to receive a training sequence for channel measurement and an identifier of a sending device broadcast by the sending device;

a measuring unit 172, configured to measure CSI of at least one specific device according to the training sequence and the identifier of the sending device;

a second receiving unit 173, configured to receive the CSI feedback indication time sent by the sending apparatus;

a first sending unit 174, configured to send, to the sending device, the measured CSI of the at least one designated device at the CSI feedback indication time.

Further, the receiving device provided in this embodiment may further include:

a third receiving unit 175, configured to receive an identifier of at least one specific device sent by the sending device before the CSI of the at least one specific device is measured according to the training sequence and the identifier of the sending device;

the measurement unit 172 is specifically configured to measure CSI of a device corresponding to the identifier of the at least one designated device according to the training sequence and the identifier of the sending device.

Further, the first receiving unit 171 is specifically configured to receive a first data packet broadcast by the sending device, where the first data packet includes: a training sequence and an identification of the transmitting device;

the third receiving unit 175 is specifically configured to receive a second data packet sent by the sending device, where the second data packet includes: identification and configuration domain information of the at least one designated device;

the measurement unit 172 is specifically configured to measure CSI of a device corresponding to the identifier of the at least one designated device according to the first data packet, the identifier of the at least one designated device, and the configuration domain information;

Further, the configuration domain information further includes: first information, where the first information is used to characterize whether the at least one designated device is a first-class device or a second-class device, the first-class device is a device that performs data transmission with the receiving device, and the second-class device is a device that generates interference with the receiving device when sending signals with other devices except the receiving device;

the first sending unit 174 is specifically configured to send, according to the first information and in different manners, the measured CSI of the at least one specific device to the sending device at the CSI feedback indication time.

Further, the first sending unit 174 is specifically configured to send, at the CSI feedback indication time, the measured CSI of the first type of device to the sending device in a high-precision sending manner; and sending the measured CSI of the second type of equipment to the sending equipment by adopting a low-precision sending mode at the CSI feedback indication time.

Further, the receiving device provided in this embodiment may further include:

a second sending unit 176, configured to send second information to the sending device if the CSI is the measured CSI of the first type device, where the second information includes at least one of the following information: and the phase difference information between the channel information among the first-class devices and the power difference information between the channel information among the first-class devices, so that the sending device can perform combined beam forming according to at least one of the phase difference information and the power difference information and the received CSI.

After the scheme is adopted, the first receiving unit is used for receiving the training sequence for channel measurement and the identifier of the sending equipment, which are broadcasted by the sending equipment; a measurement unit, configured to measure CSI of at least one specific device according to the training sequence and the identifier of the sending device; a second receiving unit, configured to receive CSI feedback indication time sent by the sending device; a first sending unit, configured to send, to the sending device, the measured CSI of the at least one specific device at the CSI feedback indication time. Compared with the prior art that the feedback step is executed immediately after the measurement step is executed, namely the measurement step and the feedback step are executed together, the receiving equipment measures the CSI of the appointed receiving equipment after receiving the first data packet, and sends the CSI to the sending equipment at the CSI feedback indication time, namely the measurement step and the feedback step of the CSI are independently separated, so that a large amount of continuous air interface resources are not occupied at one time when the measurement step or the feedback step is executed, namely the measurement step and the feedback step can be executed by using discontinuous air interface resources, the flexibility is increased, and the performance of the system is further increased; in addition, after the sending equipment completes the configuration of the first data packet, the sending equipment only needs to reconfigure the first data packet again when the channel measurement state of the specified equipment changes, thereby avoiding the frequent configuration of the first data packet and saving air interface resources; in this embodiment, by adding the first packet configuration field corresponding to the plurality of designated devices to the configuration second packet, the receiving device measures CSI of the plurality of designated devices.

In the following, an embodiment of a physical device is provided, which may correspond to the respective method embodiments provided above.

The present embodiment also provides a computer 1, as shown in fig. 18, the computer 1 includes: at least one processor 15, such as a CPU (Central Processing Unit), at least one output interface 16 or other user interface 17, a memory 18, at least one communication bus 19. The communication bus 19 is used to realize connection communication between these components. The computer 1 optionally contains other user interfaces 17 including a display, a keyboard or a pointing device (e.g. a mouse, trackball, touch pad or touch screen). The Memory 18 may comprise a high-speed RAM (Random Access Memory) and may also comprise a non-volatile Memory, such as at least one disk Memory. The memory 18 may optionally comprise at least one memory device located remotely from the aforementioned processor 15.

In some embodiments, memory 18 stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:

operating system 180, which contains various system programs for implementing various basic services and for handling hardware-based tasks.

The application 181 includes various applications for implementing various application services.

Application 181 may be implemented on a sending device, and if application 181 is implemented on a sending device, application 181 may include, but is not limited to:

Further, the application 181 may further include:

a second sending unit, configured to send the identifier of the at least one designated device to the receiving device, so that the receiving device measures CSI of a device corresponding to the identifier of the at least one designated device according to the training sequence and the identifier of the sending device.

Further, the broadcasting unit is specifically configured to broadcast a first data packet, where the first data packet includes: an identity of the training sequence and the transmitting device;

the second sending unit is specifically configured to send a second data packet to the receiving device, where the second data packet includes: the identification and the configuration domain information of the at least one designated device, so that the receiving device measures the CSI of the device corresponding to the identification of the at least one designated device according to the first data packet, the identification of the at least one designated device and the configuration domain information;

Further, the application 181 may further include:

a receiving unit, configured to receive second information sent by the receiving device if the received CSI is the measured CSI of the first type device, where the second information includes at least one of the following information: phase difference information between channel information between the first-class devices, and power difference information between channel information between the first-class devices;

a processing unit, configured to perform joint beamforming according to the received CSI and at least one of the phase difference information and the power difference information.

The application 181 may also be applied to a receiving device, and if the application 181 is applied to a receiving device, the application 181 may include, but is not limited to:

Further, the application 181 may further include:

a third receiving unit, configured to receive, before the CSI of at least one specific device is measured according to the training sequence and the identifier of the sending device, the identifier of the at least one specific device sent by the sending device;

the measurement unit is specifically configured to measure CSI of a device corresponding to the identifier of the at least one designated device according to the training sequence and the identifier of the sending device.

Further, the first receiving unit is specifically configured to receive a first data packet broadcast by the sending device, where the first data packet includes: a training sequence and an identification of the transmitting device;

the third receiving unit is specifically configured to receive a second data packet sent by the sending device, where the second data packet includes: identification and configuration domain information of the at least one designated device;

the measurement unit is specifically configured to measure CSI of a device corresponding to the identifier of the at least one designated device according to the first data packet, the identifier of the at least one designated device, and the configuration domain information;

the first sending unit is specifically configured to send, according to the first information and in different manners, the measured CSI of the at least one specific device to the sending device at the CSI feedback indication time.

Further, the first sending unit is specifically configured to send, to the sending device, the measured CSI of the first type of device in a high-precision sending manner at the CSI feedback indication time; and sending the measured CSI of the second type of equipment to the sending equipment by adopting a low-precision sending mode at the CSI feedback indication time.

Further, the application 181 may further include:

a second sending unit, configured to send second information to the sending device if the CSI is the measured CSI of the first type device, where the second information includes at least one of the following information: and the phase difference information between the channel information among the first-class devices and the power difference information between the channel information among the first-class devices, so that the sending device can perform combined beam forming according to at least one of the phase difference information and the power difference information and the received CSI.

In the embodiment of the present invention, when the computer 1 is a sending device, the processor 15 is configured to, by calling a program or an instruction stored in the memory 18:

broadcasting a training sequence used for channel measurement and an identifier of the sending device so that a receiving device measures CSI of at least one specified device according to the training sequence and the identifier of the sending device, wherein the receiving device is a device which receives the training sequence and the identifier of the sending device;

and sending the CSI feedback indication time to the receiving equipment so that the receiving equipment sends the measured CSI of at least one specified equipment to the sending equipment at the CSI feedback indication time.

Further, the processor 15 is further configured to receive the CSI sent by the receiving device if the communicable device is a sending device.

Further, the processor 15 is further configured to send the identifier of the at least one designated device to the receiving device, so that the receiving device measures CSI of a device corresponding to the identifier of the at least one designated device according to the training sequence and the identifier of the sending device.

Further, the processor 15 is specifically configured to broadcast a first data packet, where the first data packet includes: an identity of the training sequence and the transmitting device;

sending a second data packet to the receiving device, the second data packet comprising: the identification and the configuration domain information of the at least one designated device, so that the receiving device measures the CSI of the device corresponding to the identification of the at least one designated device according to the first data packet, the identification of the at least one designated device and the configuration domain information;

Further, the sending, by the receiving device, the measured CSI of the at least one specific device to the sending device in different manners specifically includes:

and sending the CSI of the first type of equipment to the sending equipment by adopting a high-precision sending mode, and sending the CSI of the second type of equipment to the sending equipment by adopting a low-precision sending mode.

Further, the processor 15 is further configured to receive second information sent by the receiving device if the received CSI is the measured CSI of the first type device, where the second information includes at least one of the following information: phase difference information between channel information between the first-class devices, and power difference information between channel information between the first-class devices;

and performing joint beam forming according to at least one of the phase difference information and the power difference information and the received CSI.

In the embodiment of the present invention, when the computer 1 is a receiving device, the processor 15 may further be configured to, by calling a program or an instruction stored in the memory 18:

receiving CSI feedback indication time sent by the sending equipment;

Further, the processor 15 is further configured to receive, before the measuring CSI of at least one specific device according to the training sequence and the identifier of the sending device, the identifier of the at least one specific device sent by the sending device;

the processor 15 is specifically configured to measure CSI of a device corresponding to the identifier of the at least one designated device according to the training sequence and the identifier of the sending device.

Further, the processor 15 specifically receives a first data packet broadcast by the sending device, where the first data packet includes: a training sequence and an identification of the transmitting device;

receiving a second data packet sent by the sending device, wherein the second data packet comprises: identification and configuration domain information of the at least one designated device;

measuring CSI of equipment corresponding to the identification of the at least one designated equipment according to the first data packet, the identification of the at least one designated equipment and the configuration domain information;

the processor 15 is specifically configured to send the measured CSI of the at least one specific device to the sending device at the CSI feedback indication time according to the first information and in different manners.

Further, the processor 15 is specifically configured to send, to the sending device, the measured CSI of the first type of device in a high-precision sending manner at the CSI feedback indication time;

and sending the measured CSI of the second type of equipment to the sending equipment by adopting a low-precision sending mode at the CSI feedback indication time.

Further, the processor 15 is further configured to send second information to the sending device if the CSI is the measured CSI of the first type device, where the second information includes at least one of the following information: and the phase difference information between the channel information among the first-class devices and the power difference information between the channel information among the first-class devices, so that the sending device can perform combined beam forming according to at least one of the phase difference information and the power difference information and the received CSI.

System embodiments are provided below, which may correspond to the respective method and apparatus embodiments provided above.

The present embodiment provides a system for channel measurement and CSI feedback, as shown in fig. 19, which may include:

a transmitting device 191 configured to broadcast a training sequence for channel measurement and an identifier of the transmitting device 191, where the receiving device 192 is a device that receives the training sequence and the identifier of the transmitting device 191; sending a CSI feedback indication time to the receiving device 192;

a receiving device 192, configured to receive the training sequence broadcasted by the sending device 191 and the identifier of the sending device 191; measuring the CSI of at least one designated device according to the training sequence and the identity of the transmitting device 191; receiving the CSI feedback indication time transmitted by the transmitting device 191; transmitting the measured CSI of the at least one designated device to the transmitting device 191 at the CSI feedback indication time.

Further, the sending device 191 is further configured to send the identifier of the at least one specified device to the receiving device 192;

the receiving device 192 is further configured to receive the identifier of the at least one designated device sent by the sending device 191; and measuring the CSI of the equipment corresponding to the identification of the at least one specified equipment according to the training sequence and the identification of the sending equipment 191.

Further, the sending device 191 is specifically configured to broadcast a first data packet, where the first data packet includes: an identification of the training sequence and the transmitting device 191; sending a second data packet to the receiving device 192, the second data packet comprising: identification and configuration domain information of the at least one designated device;

the receiving device 192 is specifically configured to receive the first data packet broadcast by the sending device 191; receiving a second data packet sent by the sending device 191; measuring CSI of equipment corresponding to the identification of the at least one designated equipment according to the first data packet, the identification of the at least one designated equipment and the configuration domain information;

the configuration domain information includes: a time offset value of a time for broadcasting the first data packet next time relative to a start position of an inherent period of the base station to which the transmitting device 191 belongs, so that the receiving device 192 is in an on state at the time for broadcasting the first data packet next time according to the time offset value.

Further, the configuration domain information further includes: first information, which is used to characterize whether the at least one designated device is a first type device or a second type device, so that the receiving device 192 sends the measured CSI of the at least one designated device to the sending device 191 in different manners; the first type of device is a device that performs data transmission with the receiving device 192, and the second type of device is a device that generates interference with the receiving device 192 when sending signals with other devices except the receiving device 192.

Further, the receiving device 192 is specifically configured to send, to the sending device 191, the measured CSI of the first type of device in a high-precision sending manner at the CSI feedback indication time; and at the CSI feedback indication time, sending the measured CSI of the second type of device to the sending device 191 in a low-precision sending manner.

Further, the sending device 191 is further configured to receive second information sent by the receiving device 192, where the second information includes at least one of the following information: phase difference information between channel information between the first-class devices, and power difference information between channel information between the first-class devices; performing combined beam forming according to the received CSI and at least one of the phase difference information and the power difference information;

the receiving device 192 is further configured to send second information to the sending device 191.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus necessary general hardware, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be substantially implemented or a part of the technical solutions contributing to the prior art may be embodied in the form of a software product, which is stored in a readable storage medium, such as a floppy disk, a hard disk, or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method for channel measurement and Channel State Information (CSI) feedback is characterized by comprising the following steps:

a transmitting device broadcasts a first data packet, the first data packet comprising: training sequences used for channel measurement and the identifications of the sending devices, so that a receiving device measures CSI of two specified devices according to the training sequences and the identifications of the sending devices, wherein the receiving device is a device which receives the training sequences and the identifications of the sending devices;

the transmitting device broadcasts a second data packet, the second data packet comprising: identification and configuration domain information of the two specified devices, the configuration domain information comprising: first information, configured to characterize whether the two designated devices are first-class devices or second-class devices, so that the receiving device sends the measured CSI of the two designated devices to the sending device in different manners; the two designated devices comprise a first type device and a second type device;

the first type of equipment is equipment for carrying out data transmission with the receiving equipment, and the second type of equipment is equipment for generating interference on the receiving equipment when sending signals with other equipment except the receiving equipment;

and the sending equipment receives the CSI of the first equipment and the CSI of the second equipment, which are sent by the receiving equipment.

2. The method of claim 1, wherein the CSI for the first type of device is a compressed transmit beamforming report.

3. The method of claim 1, wherein the CSI for the second class of devices is a covariance matrix.

4. The method according to any one of claims 1 to 3, further comprising:

and the sending equipment sends CSI feedback indication time to the receiving equipment, so that the receiving equipment sends the measured CSI of the two specified equipment to the sending equipment at the CSI feedback indication time.

5. The method according to claim 1 or 2,

the configuration domain information further includes: and the time offset value of the next time of broadcasting the first data packet relative to the inherent period starting position of the base station to which the sending equipment belongs is used for enabling the receiving equipment to be in an on state at the next time of broadcasting the first data packet according to the time offset value.

6. The method of claim 2, wherein the CSI for the first type of device further comprises at least one of the following information: phase difference information between channel information between the first-class devices, and power difference information between channel information between the first-class devices;

7. A method for channel measurement and Channel State Information (CSI) feedback is characterized by comprising the following steps:

the receiving device receives a first data packet broadcast by a sending device, wherein the first data packet comprises: a training sequence for channel measurement and an identification of the transmitting device;

the receiving device receives a second data packet broadcast by the sending device, wherein the second data packet comprises: identification of two specified devices and configuration domain information, the configuration domain information comprising: first information, configured to characterize whether the two designated devices are first-class devices or second-class devices, so that the receiving device sends the measured CSI of the two designated devices to the sending device in different manners; the two designated devices comprise a first type device and a second type device;

the receiving equipment measures CSI of the two appointed equipment according to the training sequence and the identification of the sending equipment;

and the receiving equipment sends the measured CSI of the first type equipment and the measured CSI of the second type equipment to the sending equipment.

8. The method of claim 7, wherein the CSI for the first type of device is a compressed beamforming report.

9. The method of claim 7, wherein the CSI for the second type of device is a covariance matrix.

10. The method according to any one of claims 7 to 9, further comprising:

receiving CSI feedback indication time sent by the sending equipment;

sending the measured CSI of the first type device and the CSI of the second type device to the sending device, including:

and sending the measured CSI of the first type of equipment and the measured CSI of the second type of equipment to the sending equipment at the CSI feedback indication time.

11. The method according to claim 7 or 8,

12. The method of claim 8, wherein the CSI for the first type of device further comprises at least one of the following information: and the phase difference information between the channel information among the first-class devices and the power difference information between the channel information among the first-class devices, so that the sending device can perform combined beam forming according to at least one of the phase difference information and the power difference information and the received CSI.

13. A transmitting device, comprising:

a broadcasting unit configured to broadcast a first packet, the first packet including: training sequences used for channel measurement and the identifications of the sending devices, so that a receiving device measures CSI of two specified devices according to the training sequences and the identifications of the sending devices, wherein the receiving device is a device which receives the training sequences and the identifications of the sending devices;

the broadcasting unit is further configured to broadcast a second data packet, where the second data packet includes: identification and configuration domain information of the two specified devices, the configuration domain information comprising: first information, configured to characterize whether the two designated devices are first-class devices or second-class devices, so that the receiving device sends the measured CSI of the two designated devices to the sending device in different manners; the two designated devices comprise a first type device and a second type device;

and the receiving unit is used for receiving the CSI of the first type of equipment and the CSI of the second type of equipment which are sent by the receiving equipment.

14. The transmitting device of claim 13, wherein the CSI for the first class of devices is a compressed transmit beamforming report.

15. The transmitting device of claim 13, wherein the CSI for the second class of devices is a covariance matrix.

16. The transmission apparatus according to any one of claims 13 to 15, further comprising:

a sending unit, configured to send CSI feedback indication time to the receiving device, so that the receiving device sends measured CSI of two specific devices to the sending device at the CSI feedback indication time.

17. The transmitting device according to claim 13 or 14,

18. The transmitting device of claim 14, the CSI of the first type of device further comprising at least one of the following information: phase difference information between channel information between the first-class devices, and power difference information between channel information between the first-class devices;

the transmission apparatus further includes: a processing unit, configured to perform joint beamforming according to the received CSI and at least one of the phase difference information and the power difference information.

19. A receiving device, comprising:

a receiving unit, configured to receive a first data packet broadcasted by a sending device, where the first data packet includes: a training sequence for channel measurement and an identification of the transmitting device;

the receiving unit is configured to receive a second data packet broadcast by the sending device, where the second data packet includes: identification of two specified devices and configuration domain information, the configuration domain information comprising: first information, configured to characterize whether the two designated devices are first-class devices or second-class devices, so that the receiving device sends the measured CSI of the two designated devices to the sending device in different manners; the two designated devices comprise a first type device and a second type device;

a measuring unit, configured to measure CSI of the two designated devices according to the training sequence and the identifier of the sending device;

and the sending unit is used for sending the measured CSI of the first type of equipment and the measured CSI of the second type of equipment to the sending equipment.

20. The receiving device of claim 19, wherein the CSI for the first type of device is a compressed beamforming report.

21. The receiving device of claim 19, wherein the CSI for the second class of devices is a covariance matrix.

22. The receiving device according to any one of claims 19 to 21,

the receiving unit is configured to receive CSI feedback indication time sent by the sending device;

the sending unit is specifically configured to send, to the sending device, the measured CSI of the first type of device and the measured CSI of the second type of device at the CSI feedback indication time.

23. The receiving device according to claim 19 or 20, wherein the configuration domain information comprises: and the time offset value of the next time of broadcasting the first data packet relative to the inherent period starting position of the base station to which the sending equipment belongs is used for enabling the receiving equipment to be in an on state at the next time of broadcasting the first data packet according to the time offset value.

24. The receiving device of claim 20, wherein the CSI for the first type of device further comprises at least one of the following information: and the phase difference information between the channel information among the first-class devices and the power difference information between the channel information among the first-class devices, so that the sending device can perform combined beam forming according to at least one of the phase difference information and the power difference information and the received CSI.