CN111800177B - Channel state information CSI feedback method, device, equipment and medium - Google Patents

Abstract

The embodiment of the invention discloses a Channel State Information (CSI) feedback method, a device, equipment and a medium, wherein the method comprises the following steps: respectively performing listen-before-talk (LBT) on M narrowband channels; channel state information-reference signal (CSI-RS) is respectively sent on N2 narrowband channels which are successfully preempted in the M narrowband channels; and receiving first CSI respectively corresponding to N1 narrowband channels and second CSI respectively corresponding to N2 narrowband channels sent by user equipment, wherein N1 and M are positive integers, N1 narrowband channels are narrowband channels with preemption failure in the M narrowband channels, N1, N2 and M are positive integers, and N1+N2=M. The embodiment of the invention can improve the CSI feedback quality.

Description

Channel state information CSI feedback method, device, equipment and medium

technical field

The embodiments of the present invention relate to the communication field, and in particular, to a channel state information (CSI) feedback method, device, device, and medium.

Background technique

In a New Radio (NR) system, a network device can configure one or more channel state information-reference signals (Channel State Information Reference Signal, CSI-RS) and one or more channel state information (Channel State Information, CSI) feedback configurations for a user equipment (User Equipment, UE).

The network device sends the configured CSI-RS and CSI feedback configuration to the UE, and the UE performs channel measurement according to the CSI-RS and performs CSI feedback according to the CSI feedback configuration. However, the quality of CSI feedback is currently not high.

Contents of the invention

Embodiments of the present invention provide a channel state information CSI feedback method, device, device, and medium, so as to solve the problem of low quality of CSI feedback.

In order to solve the problems of the technologies described above, the present invention is achieved in that:

In the first aspect, an embodiment of the present invention provides a channel state information CSI feedback method, which is applied to a network device, and the method includes:

Perform listen-before-talk LBT on the M narrowband channels respectively;

Send channel state information-reference signal CSI-RS on the N2 narrowband channels that have successfully preempted among the M narrowband channels;

Receive the first CSI corresponding to the N1 narrowband channels and the second CSI corresponding to the N2 narrowband channels respectively sent by the user equipment, N1 and M are positive integers, the N1 narrowband channels are narrowband channels that fail to preempt among the M narrowband channels, N1, N2 and M are positive integers, N1+N2=M.

In a second aspect, an embodiment of the present invention provides a channel state information CSI feedback method, which is applied to a user equipment, and the method includes:

Receiving the CSI-RS sent by the network device on the N2 narrowband channels respectively;

performing channel measurement according to the CSI-RS, to obtain second CSIs respectively corresponding to the N2 narrowband channels;

Send the first CSI corresponding to N1 narrowband channels and the second CSI respectively corresponding to the N2 narrowband channels to the network device, the N1 narrowband channels are narrowband channels that failed to preempt when the network device performs LBT on M narrowband channels, and the N2 narrowband channels are narrowband channels that successfully preempted when the network device performed LBT on M narrowband channels, N1, N2 and M are positive integers, N1+N2=M.

In a third aspect, an embodiment of the present invention provides a channel state information CSI feedback method, which is applied to a network device, and the method includes:

Configuring a broadband first CSI-RS for the user equipment, the broadband includes M narrowband channels, the first CSI-RS is divided into M second CSI-RS, the M narrowband channels correspond to the M second CSI-RS one by one, and M is a positive integer;

performing LBT on the M narrowband channels respectively;

Sending the second CSI-RS corresponding to the N2 narrowband channels respectively on the N2 narrowband channels, where the N2 narrowband channels are narrowband channels successfully preempted among the M narrowband channels, and N2 is a positive integer less than or equal to M;

receiving the CSI corresponding to the broadband sent by the user equipment, where the CSI corresponding to the broadband is calculated from the second CSI-RS corresponding to the N2 narrowband channels.

In a fourth aspect, an embodiment of the present invention provides a channel state information (CSI) feedback method, which is applied to a user equipment, and the method includes:

Receiving N2 second CSI-RSs sent by the network device on N2 narrowband channels, the N2 second CSI-RSs are CSI-RSs in the M second CSI-RSs divided by the first CSI-RS, the first CSI-RS is a CSI-RS configured for broadband, and the N2 narrowband channels are the narrowband channels that the network device successfully preempted when performing LBT on the M narrowband channels of the broadband respectively, and the M narrowband channels correspond to the M second CSI-RSs one by one ;

Calculate CSI corresponding to the broadband according to the N2 second CSI-RSs;

Send the CSI corresponding to the broadband to the network device.

In a fifth aspect, an embodiment of the present invention provides a channel state information CSI feedback device, which is applied to a network device, and the device includes:

The first listen-before-talk module is used to perform listen-before-talk LBT on the M narrowband channels respectively;

The first reference signal sending module is configured to send channel state information-reference signal CSI-RS on the N2 narrowband channels that have successfully preempted among the M narrowband channels;

The first information receiving module is configured to receive the first CSI corresponding to the N1 narrowband channels and the second CSI respectively corresponding to the N2 narrowband channels sent by the user equipment, N1 and M are positive integers, the N1 narrowband channels are narrowband channels that failed to preempt among the M narrowband channels, N1, N2 and M are positive integers, and N1+N2=M.

In a sixth aspect, an embodiment of the present invention provides a channel state information CSI feedback device, which is applied to a user equipment, and the device includes:

The first reference signal receiving module is configured to receive the CSI-RS sent by the network equipment on the N2 narrowband channels respectively;

A first channel measurement module, configured to perform channel measurement according to the CSI-RS, to obtain second CSIs respectively corresponding to the N2 narrowband channels;

The first information sending module is configured to send to the network device first CSIs corresponding to N1 narrowband channels and second CSIs corresponding to the N2 narrowband channels respectively, where the N1 narrowband channels are narrowband channels that fail to be preempted when the network device performs LBT on M narrowband channels, and the N2 narrowband channels are narrowband channels that are successfully preempted when the network device performs LBT on M narrowband channels, N1, N2 and M are positive integers, and N1+N2=M.

In a seventh aspect, an embodiment of the present invention provides a channel state information CSI feedback device, which is applied to a network device, and the device includes:

A reference signal configuration module, configured to configure a broadband first CSI-RS for the user equipment, the broadband includes M narrowband channels, the first CSI-RS is divided into M second CSI-RS, the M narrowband channels correspond to the M second CSI-RS one by one, and M is a positive integer;

The second listen-before-talk module is used to perform LBT on the M narrowband channels respectively;

The second reference signal sending module is configured to send the second CSI-RS corresponding to the N2 narrowband channels respectively on N2 narrowband channels, where the N2 narrowband channels are narrowband channels that have successfully preempted among the M narrowband channels, and N2 is a positive integer less than or equal to M;

The second information receiving module is configured to receive the CSI corresponding to the broadband sent by the user equipment, and the CSI corresponding to the broadband is calculated from the second CSI-RS corresponding to the N2 narrowband channels.

In an eighth aspect, an embodiment of the present invention provides a channel state information CSI feedback device, which is applied to a user equipment, and the device includes:

The second reference signal receiving module is configured to receive N2 second CSI-RSs sent by the network device on N2 narrowband channels. The N2 second CSI-RSs are the CSI-RSs in the M second CSI-RSs divided into the first CSI-RS. SI-RS one-to-one correspondence;

An information calculation module, configured to calculate the CSI corresponding to the broadband according to the N2 second CSI-RSs;

The second information sending module is configured to send the CSI corresponding to the broadband to the network device.

In a ninth aspect, an embodiment of the present invention provides a network device, including a processor, a memory, and a computer program stored in the memory and operable on the processor. When the computer program is executed by the processor, the steps of the channel state information CSI feedback method as described in the first or third claim are implemented.

In a tenth aspect, an embodiment of the present invention provides a user equipment, including a processor, a memory, and a computer program stored in the memory and operable on the processor. When the computer program is executed by the processor, the steps of the channel state information CSI feedback method described in claim 2 or claim 4 are implemented.

In an eleventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the channel state information CSI feedback method are implemented.

In the embodiment of the present invention, the user equipment not only feeds back to the network equipment the CSI corresponding to the narrowband channels that the network equipment preempts successfully, but also feeds back the CSI corresponding to the narrowband channels that the network equipment fails to preempt, which improves the quality of CSI feedback.

Description of drawings

The present invention can be better understood from the following description of specific embodiments of the present invention in conjunction with the accompanying drawings, wherein the same or similar reference numerals represent the same or similar features.

FIG. 1 shows a sequence diagram of a channel state information (CSI) feedback method according to an embodiment of the present invention;

FIG. 2 shows a schematic diagram of preempting a narrowband channel according to an embodiment of the present invention;

FIG. 3 shows a sequence diagram of a channel state information CSI feedback method according to another embodiment of the present invention;

FIG. 4 shows a schematic diagram of a wideband CSI-RS according to an embodiment of the present invention;

FIG. 5 shows a schematic diagram of a channel state information CSI feedback device according to an embodiment of the present invention;

FIG. 6 shows a schematic structural diagram of an apparatus for feeding back channel state information (CSI) according to another embodiment of the present invention;

FIG. 7 shows a schematic structural diagram of an apparatus for feeding back channel state information (CSI) according to yet another embodiment of the present invention;

FIG. 8 shows a schematic structural diagram of an apparatus for feeding back channel state information (CSI) according to yet another embodiment of the present invention;

Fig. 9 is a schematic diagram of a hardware structure of a user equipment implementing an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

FIG. 1 shows a sequence diagram of a channel state information (CSI) feedback method according to an embodiment of the present invention. As shown in Figure 1, the CSI feedback method includes:

S102. The network device performs Listen Before Talk (LBT) on the M narrowband channels respectively.

S104. The network device sends the CSI-RS on the N2 narrowband channels, respectively, where the N2 narrowband channels are narrowband channels successfully preempted among the M narrowband channels.

S106. The user equipment receives the CSI-RSs sent by the network equipment on the N2 narrowband channels respectively, performs channel measurement according to the CSI-RSs, and obtains second CSIs respectively corresponding to the N2 narrowband channels.

S108. The user equipment sends the first CSI corresponding to the N1 narrowband channels and the second CSI respectively corresponding to the N2 narrowband channels to the network device. The N1 narrowband channels are narrowband channels that fail to be preempted among the M narrowband channels. N1, N2 and M are positive integers, and N1+N2=M.

Wherein, the network device may send information of N1 narrowband channels to the user equipment, so as to indicate to the user equipment the narrowband channels that the network equipment failed to preempt; or the user equipment obtains the narrowband channels that the network equipment failed to preempt through measurement;

In the embodiment of the present invention, the user equipment not only feeds back to the network equipment the CSI corresponding to the narrowband channels that the network equipment preempts successfully, but also feeds back the CSI corresponding to the narrowband channels that the network equipment fails to preempt, which improves the quality of CSI feedback. Wherein, by improving the quality of the CSI feedback, it may be convenient for the network device to perform demodulation. For example, the M narrowband channels are two narrowband channels. Although the network device only successfully seizes one narrowband channel, the user equipment feeds back the CSI corresponding to the two narrowband channels to the network device. The total number of bits of the CSI corresponding to the two narrowband channels is 60 bits, and the network device can demodulate according to 60 bits.

In an embodiment of the present invention, the first CSI includes a channel quality indicator (Channel Quality Index, CQI) value marked out of range (out of range).

For example, in addition to the CQI value, the first CSI also includes a channel rank indicator (Rank Index, RI) value and a precoding vector indicator (Precoder Matrix Index, PMI) value, and the RI value and PMI value included in the first CSI can be any value. After receiving the first CSI, the network device identifies that the first CSI is invalid CSI through the CQI value in the first CSI, and discards the first CSI.

In an embodiment of the present invention, the CSI feedback method further includes:

If the user equipment is scheduled in one of the N2 narrowband channels, data is sent according to the second CSI corresponding to the narrowband channel.

In an embodiment of the present invention, the CSI feedback method further includes:

If the user equipment is scheduled in N3 narrowband channels among the N2 narrowband channels, a third CSI is obtained according to the second CSI corresponding to the N3 narrowband channels respectively, and N3 is a positive integer greater than 1 and less than or equal to N2; send data to the user equipment according to the third CSI.

Wherein, the second CSI includes the following information:

The second CSI may include an RI value, a wideband PMI, and a wideband CQI value.

Alternatively, the second CSI includes an RI value, P subband PMI values, and a wideband CQI value.

Alternatively, the second CSI includes an RI value, a wideband PMI, a wideband CQI value and Q subband CQI values, where Q is a positive integer.

Alternatively, the second CSI includes an RI value, P subband PMI values, a wideband CQI value and Q subband CQI values, where P is a positive integer.

Wherein, the P subbands are subbands corresponding to one of the N2 narrowband channels. The Q subbands are subbands corresponding to one of the N2 narrowband channels.

In an embodiment of the present invention, since there is one RI value in the second CSI corresponding to one narrowband channel, there are N3 RI values in total among the N3 second CSIs corresponding to the N3 narrowband channels.

The fitting of a first RI value included in the third CSI may be performed in the following manner:

1) In the case where N3 RI values are the same, the first RI value is the same value as the N3 RI values.

2) In the case where the N3 RI values are different, the first RI value is: the minimum RI value among the N3 RI values, or the maximum RI value among the N3 RI values, or any integer value between the minimum RI value and the maximum RI value.

In an embodiment of the present invention, the N3 second CSIs corresponding to the N3 narrowband channels have a total of N3 sets of CQI values, and each set of CQI values in the N3 sets of CQI values includes a wideband CQI value, or each set of CQI values includes a wideband CQI value and Q subband CQI values.

It can be seen that if a second CSI includes a wideband CQI value, then N3 sets of CQI values are N3 wideband CQI values; if a second CSI includes a wideband CQI value and Q subband CQI values, then N3 sets of CQI values are N3 wideband CQI values and N3×Q subband CQI values.

The fitting of a first CQI value included in the third CSI may be performed in the following manner:

1) In the case that the N3 groups of CQI values are the same, a first CQI value included in the third CSI is the same value as the N3 groups of CQI values.

2) In the case where the N3 groups of CQI values are different, a first CQI value included in the third CSI is: the minimum CQI value in the N3 groups of CQI values, or the maximum CQI value in the N3 groups of CQI values, or any integer value between the minimum CQI value and the maximum CQI value. For example, the maximum value of the N3 CQI values is 2, the minimum value is 5, and the first CQI value is 2 or 5 or 3 or 4.

In an embodiment of the present invention, there are N3 wideband PMI values or Y subband PMI values in N3 second CSIs corresponding to N3 narrowband channels, and the third CSI includes N3 wideband PMI values or Y subband PMI values, Y=N3×P. That is, if the network device schedules the UE on two or more narrowband channels, a third CSI is fitted by using the second CSI corresponding to the two or more narrowband channels, and the PMI is not fitted.

In an embodiment of the present invention, before S104, the CSI feedback method further includes: the network device configures a CSI-RS and a CSI feedback configuration on each of the M narrowband channels for the user equipment, the CSI-RS includes CSI Interference Measurement (CSI Interference Measurement, CSI-IM), and interference measurement resources.

An unlicensed frequency band (NRU) system may be a broadband system, which means that the NRU system is composed of multiple narrowband channels. For example, as shown in Figure 2, the NRU system consists of 4 narrowband channels, namely narrowband channels 1-4, and the size of each narrowband channel is 20MHz, so the size of the wideband channel is 80MHz. In the NRU system, a Listen Before Talk (LBT) mechanism is required. If one or more narrowband channels cannot be grabbed, no signal can be sent on the narrowband channels that cannot be grabbed.

Continuing to refer to FIG. 2 , the base station performs LBT on narrowband channels 1-4 to preempt channels. If the base station successfully preempts narrowband channels 1, 3, and 4, but fails to preempt narrowband channel 2, the base station sends CSI-RS on narrowband channels 1, 3, and 4 respectively, and does not send CSI-RS on narrowband channel 2.

The UE receives the CSI-RS on the narrowband channels 1, 3, and 4 that the base station has successfully seized, and performs channel measurement to obtain the second CSI corresponding to the narrowband channels 1, 3, and 4 respectively. The UE feeds back the second CSI corresponding to narrowband channels 1, 3, and 4 and the first CSI corresponding to narrowband channel 2 to the base station.

Fig. 3 shows a sequence diagram of a channel state information (CSI) feedback method according to another embodiment of the present invention. As shown in Figure 3, the CSI feedback method includes:

S202. The network device configures a broadband first CSI-RS for the user equipment. The broadband includes M narrowband channels, and the first CSI-RS is divided into M second CSI-RSs. The M narrowband channels correspond to the M second CSI-RSs one by one, and M is a positive integer.

S204. The network device performs LBT on the M narrowband channels respectively.

S206. The network device sends second CSI-RSs corresponding to the N2 narrowband channels respectively on the N2 narrowband channels, where the N2 narrowband channels are narrowband channels successfully preempted among the M narrowband channels, and N2 is a positive integer less than or equal to M.

S208. The user equipment receives N2 second CSI-RSs sent by the network equipment on the N2 narrowband channels, and calculates CSI corresponding to the broadband according to the N2 second CSI-RSs. Since the network device sends one second CSI-RS on one narrowband channel, the network device sends a total of N2 second CSI-RSs on N2 narrowband channels. The CSI corresponding to the broadband is one CSI.

S210, the user equipment sends the CSI corresponding to the broadband to the network device.

For example, as shown in Figure 4, the length of the broadband first CSI-RS is 0 to 23, and the first CSI-RS is divided into four second CSI-RSs as follows:

1) The second CSI-RS corresponding to the narrowband channel 1 has a length of 0 to 5;

2) The second CSI-RS corresponding to the narrowband channel 2 has a length of 6-11;

3) The second CSI-RS corresponding to the narrowband channel 3 has a length of 12-17;

4) The second CSI-RS corresponding to the narrowband channel 4 has a length of 18-23.

The network device performs LBT on narrowband channels 1-4 respectively. If narrowband channels 1, 3, and 4 are successfully seized, the second CSI-RS with a length of 0-5 is sent on narrowband channel 1, the second CSI-RS with a length of 12-17 is sent on narrowband channel 3, and the second CSI-RS with a length of 18-23 is sent on narrowband channel 4. Since the preemption of the narrowband channel 2 fails, the second CSI-RS with a length of 6-11 is not sent.

Therefore, what the user equipment receives is the second CSI-RS with a length of 0-5, the second CSI-RS with a length of 12-17, and the second CSI-RS with a length of 18-23. It can be seen that what the user equipment receives is part of the first CSI-RS, that is, the first CSI-RS of 0-5, 12-23.

In the embodiment of the present invention, the network device configures the first broadband CSI-RS for the user equipment, and each narrowband channel of the broadband is responsible for sending part of the first CSI-RS. If the network device only succeeds in preempting part of the narrowband channels, then the network device sends part of the first CSI-RS to the user equipment, and only sends the part of the CSI-RS corresponding to the narrowband channel that preempted successfully. The user equipment feeds back the CSI corresponding to the broadband to the network device. Through the CSI feedback method provided by the embodiments of the invention, the quality of CSI feedback can be improved.

An embodiment of the present invention provides a CSI feedback method, including:

The network device configures a wideband CSI-RS for the UE, and the wideband includes M narrowband channels.

Wherein, each of the M narrowband channels is responsible for sending a corresponding part of the CSI-RS, and the M narrowband channels are responsible for sending one CSI-RS in total.

The network device performs LBT on the M narrowband channels respectively.

The network device sends the corresponding part of the CSI-RS on the N2 narrowband channels among the M narrowband channels, the N1 narrowband channels are the narrowband channels that have successfully preempted among the M narrowband channels, and the N2 narrowband channels are the narrowband channels that have failed to preempt among the M narrowband channels.

Wherein, since the network device does not send any signal on the N1 narrowband channels, it only sends the CSI-RS corresponding to the narrowband channel that has successfully preempted in the frequency domain, so that the network device sends a part of a CSI-RS configured by the network device.

The UE respectively receives the CSI-RS sent by the network device on the N2 narrowband channels, and calculates the CSI corresponding to the wideband according to the CSI-RS.

Wherein, the UE receives the CSI-RS sent by the network device on the N2 narrowband channels, uses the CSI-RS as the wideband CSI-RS, and calculates a CSI corresponding to the wideband. For example, the successfully preempted narrowband channels (that is, N2 narrowband channels) are narrowband channels 1, 3, and 4, and the CSI-RS received by the UE on narrowband channels 1, 3, and 4 is used as a wideband CSI-RS, and a CSI corresponding to the wideband is calculated. The UE sends the CSI corresponding to the broadband to the network device.

In an embodiment of the present invention, the CSI corresponding to the broadband includes an RI value.

In an embodiment of the present invention, the PMI included in the CSI corresponding to the broadband has the following three types:

1) The CSI corresponding to the wideband includes the wideband PMI. In the case where the N2 narrowband channels are continuous or discontinuous narrowband channels, the wideband PMI corresponds to the N2 narrowband channels. For example, continuing to refer to FIG. 2 , narrowband channels that have successfully preempted are narrowband channels 1, 3, and 4, and narrowband channels 1, 3, and 4 are discontinuous narrowband channels. If the narrowband channels successfully preempted are narrowband channels 1, 2, and 3, narrowband channels 1, 2, and 3 are continuous narrowband channels.

2) The CSI corresponding to the broadband includes the first subband PMI, and the first subband PMI is the subband PMI corresponding to the N2 narrowband channels.

3) The CSI corresponding to the broadband includes the second subband PMI, the second subband PMI is the subband PMI corresponding to the N2 narrowband channels and the subband PMI corresponding to the N1 narrowband channels, and the N1 narrowband channels are narrowband channels that the network device did not successfully preempt when performing LBT on the M narrowband channels.

In an embodiment of the present invention, the CSI feedback method further includes:

In the case that the CSI corresponding to the wideband includes the second subband PMI, the network device discards the subband PMIs corresponding to the N1 narrowband channels.

It can be seen that for the narrowband channel where the network device LBT is unsuccessful, the UE may not feed back the subband PMI corresponding to the narrowband channel whose LBT is unsuccessful; or, the UE may feed back the subband PMI corresponding to the narrowband channel whose LBT is unsuccessful, and the base station may discard the subband PMI corresponding to the narrowband channel whose LBT is unsuccessful.

In one embodiment of the present invention, the CQI included in the CSI corresponding to the broadband has the following three types:

1) The CSI corresponding to the wideband includes the wideband CQI. In the case where the N2 narrowband channels are continuous or discontinuous narrowband channels, the wideband CQI corresponds to the N2 narrowband channels.

2) The CSI corresponding to the wideband includes the wideband CQI and the first subband CQI, and the first subband CQI is the subband CQI corresponding to the N2 narrowband channels.

3) The CSI corresponding to the broadband includes a broadband CQI and a second subband CQI. The second subband CQI is a subband CQI corresponding to N2 narrowband channels and a subband CQI corresponding to N1 narrowband channels.

In an embodiment of the present invention, the CSI feedback method further includes:

In the case that the CSI corresponding to the wideband includes the wideband CQI and the second subband CQI, the network device discards the subband CQIs corresponding to the N1 narrowband channels.

It can be seen that for the narrowband channel where the network device LBT is unsuccessful, the UE may not feed back the subband CQI corresponding to the narrowband channel whose LBT is unsuccessful; or, the UE may feed back the subband CQI corresponding to the narrowband channel whose LBT is unsuccessful, and the base station discards the subband CQI corresponding to the narrowband channel whose LBT is unsuccessful. Wherein, the subband CQI is a difference value relative to the wideband CQI.

Fig. 5 shows a schematic diagram of a device for feeding back channel state information (CSI) according to an embodiment of the present invention. The CSI feedback device is applied to a network device. As shown in FIG. 5, the CSI feedback device 300 includes:

The first listen-before-talk module 302 is configured to perform listen-before-talk LBT on the M narrowband channels respectively;

The first reference signal sending module 304 is configured to send channel state information-reference signal CSI-RS on the N2 narrowband channels that have successfully preempted among the M narrowband channels;

The first information receiving module 306 is configured to receive the first CSI corresponding to the N1 narrowband channels and the second CSI corresponding to the N2 narrowband channels respectively sent by the user equipment, N1 and M are positive integers, the N1 narrowband channels are narrowband channels that failed to preempt among the M narrowband channels, N1, N2 and M are positive integers, and N1+N2=M.

In an embodiment of the present invention, the first CSI includes a CQI value indicating an out-of-range value.

In an embodiment of the present invention, the CSI feedback device 300 further includes:

The CSI determination module is configured to, if the user equipment is scheduled in N3 narrowband channels among the N2 narrowband channels, obtain a third CSI according to the second CSIs respectively corresponding to the N3 narrowband channels, where N3 is a positive integer greater than 1 and less than or equal to N2;

A data sending module, configured to send data to the user equipment according to the third CSI.

In an embodiment of the present invention, the second CSI includes a channel rank indication RI value, a wideband precoding vector indicating PMI, and a wideband CQI value; or, the second CSI includes an RI value, P subband precoding vector indication PMI values, and a wideband CQI value; or, the second CSI includes an RI value, a wideband PMI, a wideband CQI value, and Q subband CQI values; or, the second CSI includes an RI value, P subband PMI values, a wideband CQI value and Q subband CQI values; wherein, the P subbands are the subbands corresponding to one of the N2 narrowband channels, and the Q subbands are the subbands corresponding to one of the N2 narrowband channels.

In an embodiment of the present invention, there are N3 RI values in N3 second CSIs corresponding to N3 narrowband channels, and the third CSI includes a first RI value; when the N3 RI values are the same, the first RI value is the same value as the N3 RI values; when the N3 RI values are different, the first RI value is: the minimum RI value among the N3 RI values, or the maximum RI value among the N3 RI values, or any integer value between the minimum RI value and the maximum RI value.

In an embodiment of the present invention, the N3 second CSIs corresponding to the N3 narrowband channels have N3 groups of CQI values in total, and each group of CQI values in the N3 groups of CQI values includes a wideband CQI value, or each group of CQI values includes a wideband CQI value and Q subband CQI values, and the third CSI includes a first CQI value; when the N3 groups of CQI values are the same, the first CQI value is the same value as the N3 groups of CQI values; In the case where the N3 groups of CQI values are different, the first CQI value is: the minimum CQI value in the N3 groups of CQI values, or the maximum CQI value in the N3 groups of CQI values, or any integer value between the minimum CQI value and the maximum CQI value.

In an embodiment of the present invention, there are N3 wideband PMI values or Y subband PMI values in N3 second CSIs corresponding to N3 narrowband channels, and the third CSI includes N3 wideband PMI values or Y subband PMI values, Y=N3×P.

Fig. 6 shows a schematic structural diagram of an apparatus for feeding back channel state information (CSI) according to another embodiment of the present invention. The CSI feedback device is applied to the user equipment. As shown in FIG. 6, the CSI feedback device 400 includes:

The first reference signal receiving module 402 is configured to receive the CSI-RS respectively sent by the network device on the N2 narrowband channels.

The first channel measurement module 404 is configured to perform channel measurement according to the CSI-RS to obtain second CSI corresponding to the N2 narrowband channels respectively.

The first information sending module 406 is configured to send the first CSI corresponding to the N1 narrowband channels and the second CSI corresponding to the N2 narrowband channels respectively to the network device. The N1 narrowband channels are the narrowband channels that the network device failed to preempt when performing LBT on the M narrowband channels, and the N2 narrowband channels are the narrowband channels that were successfully preempted when the network device performed LBT on the M narrowband channels.

In an embodiment of the present invention, the first CSI includes a CQI value indicating an out-of-range value.

Fig. 7 shows a schematic structural diagram of an apparatus for feeding back channel state information (CSI) according to another embodiment of the present invention. The CSI feedback device is applied to a network device. As shown in FIG. 7, the CSI feedback device 500 includes:

The reference signal configuration module 502 is configured to configure a broadband first CSI-RS for the user equipment. The broadband includes M narrowband channels, and the first CSI-RS is divided into M second CSI-RSs. The M narrowband channels correspond to the M second CSI-RSs one by one, and M is a positive integer.

The second listen-before-talk module 504 is configured to perform LBT on the M narrowband channels respectively.

The second reference signal sending module 506 is configured to send second CSI-RSs corresponding to the N2 narrowband channels respectively on the N2 narrowband channels, where the N2 narrowband channels are narrowband channels that have successfully preempted among the M narrowband channels, and N2 is a positive integer less than or equal to M.

The second information receiving module 508 is configured to receive the CSI corresponding to the broadband sent by the user equipment, and the CSI corresponding to the broadband is calculated from the second CSI-RS corresponding to the N2 narrowband channels.

In an embodiment of the present invention, the CSI corresponding to the broadband includes a broadband PMI. In the case where the N2 narrowband channels are continuous or discontinuous narrowband channels, the broadband PMI corresponds to the N2 narrowband channels; or, the CSI corresponding to the broadband includes a first subband PMI, and the first subband PMI is the subband PMI corresponding to the N2 narrowband channels; or, the CSI corresponding to the broadband includes a second subband PMI, and the second subband PMI is the subband PMI corresponding to the N2 narrowband channels and the N1 narrowband channels Corresponding to the sub-band PMI, the N1 narrowband channels are the narrowband channels that the network device failed to seize when performing LBT on the M narrowband channels.

In an embodiment of the present invention, the CSI feedback device 500 further includes:

The first information discarding module is configured to discard the sub-band PMIs corresponding to the N1 narrowband channels when the CSI corresponding to the wideband includes the second sub-band PMI.

In an embodiment of the present invention, the CSI corresponding to the broadband includes a broadband CQI. In the case where the N2 narrowband channels are continuous or discontinuous narrowband channels, the broadband CQI corresponds to the N2 narrowband channels; or, the CSI corresponding to the broadband includes the broadband CQI and the first subband CQI, and the first subband CQI is the subband CQI corresponding to the N2 narrowband channels; or, the CSI corresponding to the broadband includes the broadband CQI and the second subband CQI, and the second subband CQI is N2 The subband CQIs corresponding to the narrowband channels and the subband CQIs corresponding to the N1 narrowband channels, where the N1 narrowband channels are the narrowband channels that the network device failed to seize when performing LBT on the M narrowband channels.

In an embodiment of the present invention, the CSI feedback device 500 further includes:

The second information discarding module is configured to discard the sub-band CQIs corresponding to the N1 narrowband channels when the CSI corresponding to the wideband includes the wideband CQI and the second sub-band CQI.

Fig. 8 shows a schematic structural diagram of an apparatus for feeding back channel state information (CSI) according to another embodiment of the present invention. The CSI feedback device is applied to the user equipment. As shown in FIG. 8, the CSI feedback device 600 includes:

The second reference signal receiving module 602 is configured to receive N2 second CSI-RSs sent by the network device on N2 narrowband channels. The N2 second CSI-RSs are the CSI-RSs in the M second CSI-RSs divided into the first CSI-RS. The first CSI-RS is a CSI-RS configured for broadband, and the N2 narrowband channels are the narrowband channels that the network device successfully preempts when performing LBT on the M narrowband channels of the broadband respectively. The M narrowband channels and the M second CSI-RSs one-to-one correspondence;

An information calculation module 604, configured to calculate CSI corresponding to the broadband according to the N2 second CSI-RSs;

The second information sending module 606 is configured to send the CSI corresponding to the broadband to the network device.

In an embodiment of the present invention, the CSI corresponding to the broadband includes a broadband PMI. In the case where the N2 narrowband channels are continuous or discontinuous narrowband channels, the broadband PMI corresponds to the N2 narrowband channels; or, the CSI corresponding to the broadband includes a first subband PMI, and the first subband PMI is the subband PMI corresponding to the N2 narrowband channels; or, the CSI corresponding to the broadband includes a second subband PMI, and the second subband PMI is the subband PMI corresponding to the N2 narrowband channels and the N1 narrowband channels Corresponding to the sub-band PMI, the N1 narrowband channels are the narrowband channels that the network device failed to seize when performing LBT on the M narrowband channels.

In an embodiment of the present invention, the CSI corresponding to the broadband includes a broadband CQI. In the case where the N2 narrowband channels are continuous or discontinuous narrowband channels, the broadband CQI corresponds to the N2 narrowband channels; or, the CSI corresponding to the broadband includes the broadband CQI and the first subband CQI, and the first subband CQI is the subband CQI corresponding to the N2 narrowband channels; or, the CSI corresponding to the broadband includes the broadband CQI and the second subband CQI, and the second subband CQI is N2 The subband CQIs corresponding to the narrowband channels and the subband CQIs corresponding to the N1 narrowband channels, where the N1 narrowband channels are the narrowband channels that the network device failed to seize when performing LBT on the M narrowband channels.

9 is a schematic diagram of a hardware structure of a user equipment implementing an embodiment of the present invention. The user equipment 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710, and a power supply 711. Those skilled in the art can understand that the user equipment structure shown in FIG. 9 does not constitute a limitation on the user equipment, and the user equipment may include more or less components than shown in the figure, or combine some components, or arrange different components. In the embodiment of the present invention, the user equipment includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a vehicle terminal, a wearable device, and a pedometer, and the like.

Wherein, the radio frequency unit 701 is configured to receive the CSI-RS respectively sent by the network equipment on the N2 narrowband channels.

The processor 710 is configured to perform channel measurement according to the CSI-RS to obtain second CSI corresponding to the N2 narrowband channels respectively.

The radio frequency unit 701 is further configured to send to the network device first CSIs corresponding to N1 narrowband channels and second CSIs corresponding to N2 narrowband channels respectively. The N1 narrowband channels are narrowband channels that failed to be preempted when the network device performs LBT on M narrowband channels, and the N2 narrowband channels are narrowband channels that were successfully preempted when the network device performed LBT on M narrowband channels. N1, N2 and M are positive integers, and N1+N2=M.

or,

The radio frequency unit 701 is configured to receive N2 second CSI-RSs sent by the network device on N2 narrowband channels. The N2 second CSI-RSs are the CSI-RSs in the M second CSI-RSs divided into the first CSI-RS. The first CSI-RS is a CSI-RS configured for broadband, and the N2 narrowband channels are the narrowband channels that the network device successfully preempts when performing LBT on the M narrowband channels of the broadband respectively. The M narrowband channels correspond to the M second CSI-RSs one by one. .

The processor 710 is configured to calculate CSI corresponding to the wideband according to the N2 second CSI-RSs.

The radio frequency unit 701 is configured to send the CSI corresponding to the broadband to the network device.

In the embodiment of the present invention, the quality of CSI feedback can be improved by feeding back the CSI corresponding to the narrowband channel whose preemption fails, or feeding back the CSI corresponding to the wideband channel.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 can be used for receiving and sending signals during sending and receiving information or during a call. Specifically, after receiving the downlink data from the base station, it is processed by the processor 710; in addition, the uplink data is sent to the base station. Generally, the radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 701 can also communicate with the network and other devices through a wireless communication system.

The user equipment provides users with wireless broadband Internet access through the network module 702, such as helping users send and receive emails, browse web pages, and access streaming media.

The audio output unit 703 may convert audio data received by the radio frequency unit 701 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Moreover, the audio output unit 703 may also provide audio output related to a specific function performed by the user equipment 700 (for example, call signal reception sound, message reception sound, etc.). The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.

The input unit 704 is used to receive audio or video signals. The input unit 704 may include a graphics processor (Graphics Processing Unit, GPU) 7041 and a microphone 7042. The graphics processor 7041 processes image data of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 706 . The image frames processed by the graphics processor 7041 may be stored in the memory 709 (or other storage media) or sent via the radio frequency unit 701 or the network module 702 . The microphone 7042 can receive sound, and can process such sound into audio data. The processed audio data can be converted into a format that can be sent to a mobile communication base station via the radio frequency unit 701 for output in the case of a phone call mode.

The user equipment 700 also includes at least one sensor 705, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, where the ambient light sensor can adjust the brightness of the display panel 7061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 7061 and/or the backlight when the user equipment 700 moves to the ear. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when it is stationary, and can be used to identify user device posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, knocking), etc.; sensor 705 can also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which will not be repeated here.

The display unit 706 is used to display information input by the user or information provided to the user. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), or the like.

The user input unit 707 can be used to receive input numbers or character information, and generate key signal input related to user settings and function control of the user equipment. Specifically, the user input unit 707 includes a touch panel 7071 and other input devices 7072 . The touch panel 7071, also referred to as a touch screen, can collect user touch operations on or near it (for example, the user uses any suitable object or accessory such as a finger or a stylus to operate on the touch panel 7071 or near the touch panel 7071). The touch panel 7071 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the processor 710, and receives and executes the command sent by the processor 710. In addition, the touch panel 7071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 7071 , the user input unit 707 may also include other input devices 7072 . Specifically, other input devices 7072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be repeated here.

Further, the touch panel 7071 can be covered on the display panel 7061, and when the touch panel 7071 detects a touch operation on or near it, it transmits to the processor 710 to determine the type of the touch event, and then the processor 710 provides corresponding visual output on the display panel 7061 according to the type of the touch event. Although in FIG. 9, the touch panel 7071 and the display panel 7061 are used as two independent components to implement the input and output functions of the user equipment, but in some embodiments, the touch panel 7071 and the display panel 7061 can be integrated to implement the input and output functions of the user equipment, which is not limited here.

The interface unit 708 is an interface for connecting an external device to the user equipment 700 . For example, an external device may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input/output (I/O) port, a video I/O port, a headphone port, and the like. The interface unit 708 may be used to receive input (eg, data information, power, etc.) from an external device and transmit the received input to one or more elements within the user device 700 or may be used to transmit data between the user device 700 and an external device.

The memory 709 can be used to store software programs as well as various data. The memory 709 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playback function, an image playback function, etc.); In addition, the memory 709 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The processor 710 is the control center of the user equipment, and uses various interfaces and lines to connect various parts of the entire user equipment, by running or executing software programs and/or modules stored in the memory 709, and calling data stored in the memory 709, executing various functions of the user equipment and processing data, so as to monitor the user equipment as a whole. The processor 710 may include one or more processing units; preferably, the processor 710 may integrate an application processor and a modem processor, wherein the application processor mainly processes operating systems, user interfaces, and application programs, and the modem processor mainly processes wireless communications. It can be understood that the foregoing modem processor may not be integrated into the processor 710 .

The user equipment 700 may also include a power supply 711 (such as a battery) for supplying power to various components. Preferably, the power supply 711 may be logically connected to the processor 710 through a power management system, so as to implement functions such as management charging, discharging, and power consumption management through the power management system.

In addition, the user equipment 700 includes some unshown functional modules, which will not be repeated here.

The embodiment of the present invention also provides a user equipment, including a processor, a memory, and a computer program stored in the memory and operable on the processor. When the computer program is executed by the processor, the process of the above-mentioned CSI feedback method embodiment can be achieved, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

The embodiment of the present invention also provides a network device, including a processor, a memory, and a computer program stored in the memory and operable on the processor. When the computer program is executed by the processor, the process of the above-mentioned CSI feedback method embodiment can be achieved, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, each process of the above-mentioned CSI feedback method embodiment can be achieved, and the same technical effect can be achieved. To avoid repetition, details are not repeated here. Wherein, the computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk or an optical disk, and the like.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention can be embodied in the form of a software product in essence or the part that contributes to the prior art. The computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), and includes several instructions to make a terminal (which can be a mobile phone, computer, server, air conditioner, or network equipment, etc.) execute the method of each embodiment of the present invention.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Under the inspiration of the present invention, those skilled in the art can also make many forms without departing from the scope of protection of the purpose of the present invention and claims, all of which belong to the protection of the present invention.

Claims (21)

1. A channel state information, CSI, feedback method, applied to a network device, the method comprising:

respectively performing listen-before-talk (LBT) on M narrowband channels;

channel state information-reference signal (CSI-RS) is respectively sent on N2 narrowband channels which are successfully preempted in the M narrowband channels;

receiving first CSI respectively corresponding to N1 narrowband channels and second CSI respectively corresponding to N2 narrowband channels sent by user equipment, wherein N1 and M are positive integers, N1 narrowband channels are narrowband channels with preemption failure in the M narrowband channels, N1, N2 and M are positive integers, and N1+N2=M;

further comprises:

if the user equipment is scheduled in N3 narrowband channels in the N2 narrowband channels, obtaining a third CSI according to the second CSI respectively corresponding to the N3 narrowband channels, wherein N3 is a positive integer greater than 1 and less than or equal to N2;

And sending data to the user equipment according to the third CSI.

2. The method of claim 1, wherein the first CSI comprises an indication of out-of-range channel quality indicator, CQI, value.

3. The method of claim 1, wherein the step of determining the position of the substrate comprises,

the second CSI comprises a channel Rank Indication (RI) value, a broadband precoding vector indicator (PMI) and a broadband CQI value;

or,

the second CSI comprises an RI value, P sub-band precoding vector indicator PMI values and a broadband CQI value;

or,

the second CSI comprises an RI value, a broadband PMI, a broadband CQI value and Q sub-band CQI values;

or,

the second CSI comprises an RI value, P subband PMI values, a broadband CQI value and Q subband CQI values;

the P subbands are subbands corresponding to one narrowband channel of the N2 narrowband channels, and the Q subbands are subbands corresponding to one narrowband channel of the N2 narrowband channels.

4. The method of claim 3, wherein N3 RI values are shared among N3 of the second CSI corresponding to the N3 narrowband channels, and the third CSI comprises one first RI value;

in the case that the N3 RI values are the same, the first RI value is the same value as the N3 RI values;

In the case that the N3 RI values are not identical, the first RI value is: the minimum RI value of the N3 RI values, or the maximum RI value of the N3 RI values, or any integer value between the minimum RI value and the maximum RI value.

5. The method of claim 3, wherein N3 of the second CSI for the N3 narrowband channels together have N3 sets of CQI values, each of the N3 sets of CQI values comprising one wideband CQI value, or each of the sets of CQI values comprising one wideband CQI value and Q subband CQI values, the third CSI comprising one first CQI value;

in the case that the N3 group CQI values are the same, the first CQI value is the same value as the N3 group CQI value;

in the case that the N3 groups of CQI values are not identical, the first CQI value is: a minimum CQI value of the N3 group CQI values, or a maximum CQI value of the N3 group CQI values, or any integer value between the minimum CQI value and the maximum CQI value.

6. The method of claim 3, wherein N3 wideband PMI values or Y subband PMI values are shared among N3 of the second CSI corresponding to the N3 narrowband channels, the third CSI comprising the N3 wideband PMI values or the Y subband PMI values, Y = n3 x P.

7. A channel state information CSI feedback method, applied to a user equipment, the method comprising:

receiving CSI-RSs respectively transmitted by network equipment on N2 narrowband channels;

channel measurement is carried out according to the CSI-RS, so that second CSI respectively corresponding to the N2 narrow-band channels is obtained;

transmitting first CSI corresponding to N1 narrowband channels and second CSI corresponding to N2 narrowband channels to the network device, where the N1 narrowband channels are narrowband channels that the network device fails to preempt when performing LBT on M narrowband channels, the N2 narrowband channels are narrowband channels that the network device succeeds in preempt when performing LBT on M narrowband channels, N1, N2, and M are positive integers, and n1+n2=m;

and receiving data sent by the network equipment according to third CSI, wherein the third CSI is one CSI obtained by scheduling the user equipment in N3 narrowband channels in the N2 narrowband channels according to the second CSI respectively corresponding to the N3 narrowband channels, and N3 is a positive integer greater than 1 and less than or equal to N2.

8. The method of claim 7, wherein the first CSI comprises an indication of out-of-range channel quality indicator, CQI, value.

9. A channel state information, CSI, feedback method, applied to a network device, the method comprising:

configuring a wideband first CSI-RS for user equipment, wherein the wideband comprises M narrowband channels, the first CSI-RS is divided into M second CSI-RSs, the M narrowband channels are in one-to-one correspondence with the M second CSI-RSs, and M is a positive integer;

respectively carrying out LBT on the M narrowband channels;

the second CSI-RS corresponding to the N2 narrowband channels are respectively sent on N2 narrowband channels, wherein the N2 narrowband channels are narrowband channels which are successfully preempted in the M narrowband channels, and N2 is a positive integer less than or equal to M;

receiving the CSI corresponding to the broadband sent by the user equipment, wherein the CSI corresponding to the broadband is obtained by calculation of the second CSI-RS corresponding to the N2 narrowband channels;

the CSI corresponding to the wideband includes wideband CQI corresponding to the N2 narrowband channels in the case where the N2 narrowband channels are continuous or discontinuous narrowband channels;

or,

the CSI corresponding to the wideband comprises a wideband CQI and a first sub-band CQI, wherein the first sub-band CQI is the sub-band CQI corresponding to the N2 narrowband channels;

or,

The CSI corresponding to the wideband includes a wideband CQI and a second subband CQI, where the second subband CQI is a subband CQI corresponding to the N2 narrowband channels and a subband CQI corresponding to the N1 narrowband channels, and the N1 narrowband channels are narrowband channels that are not successfully preempted when the network device performs LBT on the M narrowband channels.

10. The method of claim 9, wherein the step of determining the position of the substrate comprises,

the CSI corresponding to the wideband includes a wideband PMI corresponding to the N2 narrowband channels in case that the N2 narrowband channels are continuous or discontinuous narrowband channels;

or,

the CSI corresponding to the broadband comprises a first sub-band PMI, wherein the first sub-band PMI is a sub-band PMI corresponding to the N2 narrowband channels;

or,

the CSI corresponding to the wideband includes a second subband PMI, where the second subband PMI is a subband PMI corresponding to the N2 narrowband channels and a subband PMI corresponding to the N1 narrowband channels, and the N1 narrowband channels are narrowband channels that are not successfully preempted when the network device performs LBT on the M narrowband channels.

11. The method as recited in claim 10, further comprising:

and discarding the subband PMIs corresponding to the N1 narrowband channels under the condition that the CSI corresponding to the wideband comprises the second subband PMI.

12. The method as recited in claim 9, further comprising:

and discarding the sub-band CQI corresponding to the N1 narrowband channels under the condition that the CSI corresponding to the wideband comprises the wideband CQI and the second sub-band CQI.

13. A channel state information CSI feedback method, applied to a user equipment, the method comprising:

receiving N2 second CSI-RSs sent by network equipment on N2 narrowband channels, wherein the N2 second CSI-RSs are CSI-RSs in M second CSI-RSs divided by a first CSI-RS, the first CSI-RS is configured for a broadband, the N2 narrowband channels are narrowband channels which are successfully preempted when the network equipment performs LBT on M narrowband channels of the broadband respectively, and the M narrowband channels are in one-to-one correspondence with the M second CSI-RSs;

calculating CSI corresponding to the broadband according to the N2 second CSI-RSs;

transmitting the CSI corresponding to the broadband to the network equipment;

the CSI corresponding to the wideband includes wideband CQI corresponding to the N2 narrowband channels in the case where the N2 narrowband channels are continuous or discontinuous narrowband channels;

or,

the CSI corresponding to the wideband comprises a wideband CQI and a first sub-band CQI, wherein the first sub-band CQI is the sub-band CQI corresponding to the N2 narrowband channels;

Or,

the CSI corresponding to the wideband includes a wideband CQI and a second subband CQI, where the second subband CQI is a subband CQI corresponding to the N2 narrowband channels and a subband CQI corresponding to the N1 narrowband channels, and the N1 narrowband channels are narrowband channels that are not successfully preempted when the network device performs LBT on the M narrowband channels.

14. The method of claim 13, wherein the step of determining the position of the probe is performed,

the CSI corresponding to the wideband includes a wideband PMI corresponding to the N2 narrowband channels in case that the N2 narrowband channels are continuous or discontinuous narrowband channels;

or,

the CSI corresponding to the broadband comprises a first sub-band PMI, wherein the first sub-band PMI is a sub-band PMI corresponding to the N2 narrowband channels;

or,

the CSI corresponding to the wideband includes a second subband PMI, where the second subband PMI is a subband PMI corresponding to the N2 narrowband channels and a subband PMI corresponding to the N1 narrowband channels, and the N1 narrowband channels are narrowband channels that are not successfully preempted when the network device performs LBT on the M narrowband channels.

15. A channel state information, CSI, feedback apparatus for use in a network device, the apparatus comprising:

A first listen-before-talk module, configured to perform listen-before-talk LBT on M narrowband channels respectively;

the first reference signal sending module is used for respectively sending channel state information-reference signals (CSI-RS) on N2 narrowband channels which are successfully preempted in the M narrowband channels;

the first information receiving module is used for receiving first CSI respectively corresponding to N1 narrowband channels and second CSI respectively corresponding to N2 narrowband channels sent by user equipment, wherein N1 and M are positive integers, N1 narrowband channels are narrowband channels with failed preemption in the M narrowband channels, N1, N2 and M are positive integers, and N1+N2=M;

further comprises:

the CSI determining module is used for obtaining a third CSI according to the second CSI respectively corresponding to the N3 narrowband channels if the user equipment is scheduled in N3 narrowband channels in the N2 narrowband channels, wherein N3 is a positive integer which is more than 1 and less than or equal to N2;

and the data sending module is used for sending data to the user equipment according to the third CSI.

16. A channel state information, CSI, feedback apparatus, applied to a user equipment, the apparatus comprising:

the first reference signal receiving module is used for receiving CSI-RSs respectively transmitted by the network equipment on N2 narrowband channels;

The first channel measurement module is used for carrying out channel measurement according to the CSI-RS to obtain second CSI corresponding to the N2 narrow-band channels respectively;

a first information sending module, configured to send, to the network device, first CSI corresponding to N1 narrowband channels respectively and second CSI corresponding to N2 narrowband channels respectively, where the N1 narrowband channels are narrowband channels that the network device fails to preempt when performing LBT on M narrowband channels, the N2 narrowband channels are narrowband channels that the network device succeeds in preempt when performing LBT on M narrowband channels, where N1, N2, and M are positive integers, and n1+n2=m;

the first reference signal receiving module is further configured to receive data sent by the network device according to third CSI, where the third CSI is one CSI obtained by scheduling the user device in N3 narrowband channels in the N2 narrowband channels, and the network device is a positive integer greater than 1 and less than or equal to N2 according to the second CSI corresponding to the N3 narrowband channels respectively.

17. A channel state information, CSI, feedback apparatus for use in a network device, the apparatus comprising:

a reference signal configuration module, configured to configure a wideband first CSI-RS for a user equipment, where the wideband includes M narrowband channels, the first CSI-RS are divided into M second CSI-RS, the M narrowband channels are in one-to-one correspondence with the M second CSI-RS, and M is a positive integer;

A second listen-before-talk module, configured to perform LBT on the M narrowband channels respectively;

a second reference signal sending module, configured to send the second CSI-RS corresponding to the N2 narrowband channels on N2 narrowband channels, where the N2 narrowband channels are narrowband channels that are successfully preempted in the M narrowband channels, and N2 is a positive integer less than or equal to M;

the second information receiving module is used for receiving the CSI corresponding to the broadband sent by the user equipment, wherein the CSI corresponding to the broadband is obtained by calculation of the second CSI-RS corresponding to the N2 narrowband channels;

the CSI corresponding to the wideband includes wideband CQI corresponding to the N2 narrowband channels in the case where the N2 narrowband channels are continuous or discontinuous narrowband channels;

or,

the CSI corresponding to the wideband comprises a wideband CQI and a first sub-band CQI, wherein the first sub-band CQI is the sub-band CQI corresponding to the N2 narrowband channels;

or,

the CSI corresponding to the wideband includes a wideband CQI and a second subband CQI, where the second subband CQI is a subband CQI corresponding to the N2 narrowband channels and a subband CQI corresponding to the N1 narrowband channels, and the N1 narrowband channels are narrowband channels that are not successfully preempted when the network device performs LBT on the M narrowband channels.

18. A channel state information, CSI, feedback apparatus, applied to a user equipment, the apparatus comprising:

the second reference signal receiving module is used for receiving N2 second CSI-RSs sent by the network equipment on N2 narrowband channels, wherein the N2 second CSI-RSs are CSI-RSs in M second CSI-RSs divided by a first CSI-RS, the first CSI-RSs are CSI-RSs configured for a broadband, the N2 narrowband channels are narrowband channels which are successfully preempted when the network equipment performs LBT on the M narrowband channels of the broadband respectively, and the M narrowband channels are in one-to-one correspondence with the M second CSI-RSs;

the information calculation module is used for calculating the CSI corresponding to the broadband according to the N2 second CSI-RSs;

a second information sending module, configured to send CSI corresponding to the wideband to the network device;

the CSI corresponding to the wideband includes wideband CQI corresponding to the N2 narrowband channels in the case where the N2 narrowband channels are continuous or discontinuous narrowband channels;

or,

the CSI corresponding to the wideband comprises a wideband CQI and a first sub-band CQI, wherein the first sub-band CQI is the sub-band CQI corresponding to the N2 narrowband channels;

Or,

the CSI corresponding to the wideband includes a wideband CQI and a second subband CQI, where the second subband CQI is a subband CQI corresponding to the N2 narrowband channels and a subband CQI corresponding to the N1 narrowband channels, and the N1 narrowband channels are narrowband channels that are not successfully preempted when the network device performs LBT on the M narrowband channels.

19. A network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps of the channel state information, CSI, feedback method according to any of claims 1 to 6, 9 to 12.

20. A user equipment comprising a processor, a memory and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the channel state information, CSI, feedback method of any of claims 7 or 8, 13 to 14.

21. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the channel state information CSI feedback method according to any of claims 1 to 14.