CN111800177B

CN111800177B - Channel State Information (CSI) feedback method, device, equipment and medium

Info

Publication number: CN111800177B
Application number: CN201910760386.9A
Authority: CN
Inventors: 塔玛拉卡·拉盖施; 吴凯; 潘学明
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2023-07-25
Anticipated expiration: 2039-08-16
Also published as: CN111800177A

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 embodiment of the invention relates to the field of communication, in particular to a Channel State Information (CSI) feedback method, device, equipment and medium.

Background

In a New Radio (NR) system, a network device may 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 (UE).

The network equipment sends the configured CSI-RS and the 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 not high at present.

Disclosure of Invention

The embodiment of the invention provides a Channel State Information (CSI) feedback method, device, equipment and medium, which are used for solving the problem of low quality of CSI feedback.

In order to solve the technical problems, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a channel state information CSI feedback method, applied to a network device, where the method includes:

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.

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

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;

and sending first CSI respectively corresponding to N1 narrowband channels and second CSI respectively corresponding to N2 narrowband channels to the network equipment, wherein the N1 narrowband channels are narrowband channels which fail to be preempted when the network equipment performs LBT on M narrowband channels, the N2 narrowband channels are narrowband channels which fail to be preempted when the network equipment performs LBT on M narrowband channels, N1, N2 and M are positive integers, and N1+N2=M.

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

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;

And receiving the CSI corresponding to the broadband transmitted by the user equipment, wherein the CSI corresponding to the broadband is calculated by the second CSI-RS corresponding to the N2 narrowband channels.

In a fourth aspect, an embodiment of the present invention provides a CSI feedback method, applied to a ue, where the method includes:

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;

and sending the CSI corresponding to the broadband to the network equipment.

In a fifth aspect, an embodiment of the present invention provides a CSI feedback device, applied to a network device, where the device includes:

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 configured to receive first CSI corresponding to N1 narrowband channels and second CSI corresponding to N2 narrowband channels, where 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.

In a sixth aspect, an embodiment of the present invention provides a CSI feedback device, applied to a ue, where the device includes:

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;

the first information sending module is configured to send, to the network device, first CSI corresponding to N1 narrowband channels and second CSI corresponding to N2 narrowband channels, 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.

In a seventh aspect, an embodiment of the present invention provides a CSI feedback device, applied to a network device, where the device includes:

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;

and the second information receiving module is used for receiving the CSI corresponding to the broadband, which is sent by the user equipment, wherein the CSI corresponding to the broadband is calculated by the second CSI-RS corresponding to the N2 narrowband channels.

In an eighth aspect, an embodiment of the present invention provides a CSI feedback device, applied to a ue, where the device includes:

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;

and the second information sending module is used for sending the CSI corresponding to the broadband to the network equipment.

In a ninth aspect, an embodiment of the present invention provides a network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of the channel state information CSI feedback method according to the first or third aspect when executed by the processor.

In a tenth aspect, an embodiment of the present invention provides a user equipment, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of the channel state information CSI feedback method according to the second or fourth aspect when executed by the processor.

In an eleventh aspect, embodiments of the present invention provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the channel state information CSI feedback method.

In the embodiment of the invention, the user equipment feeds back the CSI corresponding to the narrowband channel which is successfully preempted by the network equipment to the network equipment, and feeds back the CSI corresponding to the narrowband channel which is unsuccessfully preempted by the network equipment, thereby improving the quality of the CSI feedback.

Drawings

The invention will be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings in which like or similar reference characters designate like or similar features.

Fig. 1 shows a timing diagram of a channel state information CSI feedback method of an embodiment of the present invention;

FIG. 2 shows a schematic diagram of preempting narrowband channels of an embodiment of the invention;

fig. 3 shows a timing 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 for 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 is a schematic structural diagram illustrating a channel state information CSI feedback apparatus according to another embodiment of the present invention;

fig. 7 is a schematic structural diagram illustrating a channel state information CSI feedback apparatus according to still another embodiment of the present invention;

Fig. 8 is a schematic structural diagram illustrating a channel state information CSI feedback apparatus according to still another embodiment of the present invention;

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

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Fig. 1 shows a timing diagram of a channel state information CSI feedback method according to an embodiment of the present invention. As shown in fig. 1, the CSI feedback method includes:

s102, the network device respectively performs listen before talk (Listen Before Talk, LBT) on the M narrowband channels.

S104, the network equipment respectively transmits the CSI-RS on N2 narrowband channels, wherein the N2 narrowband channels are narrowband channels which are successfully preempted in the M narrowband channels.

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

S108, the user equipment sends first CSI respectively corresponding to N1 narrow-band channels and second CSI respectively corresponding to N2 narrow-band channels to the network equipment, wherein the N1 narrow-band channels are narrow-band channels with failed preemption in M narrow-band channels, N1, N2 and M are positive integers, and N1+N2=M.

The network device may send information of the N1 narrowband channels to the user device, so as to indicate to the user device that the network device seizes the narrowband channel that fails; or the user equipment obtains a narrowband channel which is failed to be preempted by the network equipment through measurement; or the user equipment acquires the narrowband channel which is failed to be preempted by the network equipment according to the narrowband channel which is successfully preempted by the network equipment and all the narrowband channels which are subjected to LBT by the network equipment.

In the embodiment of the invention, the user equipment feeds back the CSI corresponding to the narrowband channel which is successfully preempted by the network equipment to the network equipment, and feeds back the CSI corresponding to the narrowband channel which is unsuccessfully preempted by the network equipment, thereby improving the quality of the CSI feedback. Wherein, by improving the quality of the CSI feedback, the network device can be facilitated to demodulate. For example, the M narrowband channels are 2 narrowband channels, and although the network device only successfully seizes one narrowband channel, the user device feeds back CSI corresponding to the 2 narrowband channels to the network device, and the total bit number of CSI corresponding to the 2 narrowband channels is 60 bits, and the network device can demodulate according to the 60 bits.

In one embodiment of the invention, the first CSI comprises a channel quality indicator (Channel Quality Index, CQI) value indicating out of range.

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

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

and if the user equipment is scheduled in one narrow-band channel in the N2 narrow-band channels, transmitting data according to the second CSI corresponding to the narrow-band channel.

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.

Wherein the second CSI includes the following information:

the second CSI may include one RI value, one wideband PMI, and one wideband CQI value.

Alternatively, the second CSI may include one RI value, P subband PMI values, and one wideband CQI value.

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

Alternatively, the second CSI may include an RI value, P subband PMI values, a wideband CQI value and Q subband CQI values, P being a positive integer.

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

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

The fitting of one first RI value included in the third CSI may be as follows:

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

2) In the case where 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.

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

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

The fitting of one first CQI value comprised by the third CSI may be as follows:

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

2) In case that the N3 groups of CQI values are not identical, the third CSI includes one first CQI value of: the minimum CQI value of the N3 sets of CQI values, or the maximum CQI value of the N3 sets 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 group CQI values is 2, the minimum value is 5, and the first CQI value is 2 or 5 or 3 or 4.

In one embodiment of the present invention, N3 wideband PMI values or Y subband PMI values are shared in N3 second CSI corresponding to N3 narrowband channels, and the third CSI includes N3 wideband PMI values or Y subband PMI values, y=n3×p. 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, where the PMI is not fitted.

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

An unlicensed band (NRU) system may be a broadband system, which means that the NRU system is composed of a plurality of narrowband channels. For example, as shown in fig. 2, the NRU system is composed of 4 narrowband channels, narrowband channels 1-4, each having a size of 20MHz, and the wideband channel has a size of 80MHz. A listen before talk (Listen Before Talk, LBT) mechanism is required in NRU systems and if one or more narrowband channels are not preempted, no signal can be sent on the preempted narrowband channels.

With continued reference to fig. 2, the base station performs LBT on narrowband channels 1-4, respectively, to preempt the channels, where the base station successfully preempts narrowband channels 1, 3, 4 and the narrowband channel 2 fails to preempt, then the base station sends CSI-RS on narrowband channels 1, 3, 4, respectively, and does not send CSI-RS on narrowband channel 2.

And the UE receives the CSI-RS on the narrowband channels 1, 3 and 4 which are successfully preempted by the base station, and performs channel measurement to obtain second CSI corresponding to the narrowband channels 1, 3 and 4. The UE feeds back the second CSI corresponding to the narrowband channels 1, 3 and 4 and the first CSI corresponding to the narrowband channel 2 to the base station.

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

s202, the network equipment configures a wideband first CSI-RS for the 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.

And S204, the network equipment respectively performs LBT on the M narrowband channels.

S206, the network device respectively transmits second CSI-RSs corresponding to N2 narrowband channels 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.

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

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

For example, as shown in fig. 4, the length of the wideband first CSI-RS is 0 to 23, and the first CSI-RS is divided into 4 second CSI-RS as follows:

1) The length of the second CSI-RS corresponding to the narrow-band channel 1 is 0-5;

2) The length of the second CSI-RS corresponding to the narrow-band channel 2 is 6-11;

3) The length of the second CSI-RS corresponding to the narrow-band channel 3 is 12-17;

4) And the length of the second CSI-RS corresponding to the narrow-band channel 4 is 18-23.

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

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

In the embodiment of the invention, the network equipment configures a wideband first CSI-RS for the user equipment, each narrowband channel of the wideband is responsible for part of transmission of the first CSI-RS, and if the network equipment only performs preemption on part of the narrowband channels successfully, the network equipment transmits part of the first CSI-RS to the user equipment and only transmits the CSI-RS part corresponding to the narrowband channels successfully preempted. And the user equipment feeds back the CSI corresponding to the broadband to the network equipment. The CSI feedback method provided by the embodiment of the invention can improve the quality of the CSI feedback.

The embodiment of the invention provides a CSI feedback method, which comprises the following steps:

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

Wherein, each narrow-band channel in M narrow-band channels is responsible for transmitting the CSI-RS of the corresponding part, and M narrow-band channels are totally responsible for transmitting one CSI-RS.

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

The network equipment respectively transmits the CSI-RS of the corresponding part on N2 narrow-band channels in the M narrow-band channels, wherein N1 narrow-band channels are narrow-band channels with successful preemption in the M narrow-band channels, and N2 narrow-band channels are narrow-band channels with failure preemption in the M narrow-band channels.

The network device does not send any signal on the N1 narrowband channels, and only sends the CSI-RS corresponding to the narrowband channels which are successfully preempted on the frequency domain, so that the network device sends a part of one CSI-RS configured by the network device.

And the UE respectively receives the CSI-RSs sent by the network equipment on the N2 narrowband channels, and calculates CSI corresponding to the wideband according to the CSI-RSs.

The UE receives the CSI-RS sent by the network equipment on N2 narrowband channels, takes the CSI-RS as a wideband CSI-RS, and calculates one CSI corresponding to the wideband. For example, the narrowband channels (i.e., N2 narrowband channels) that are successfully preempted are narrowband channels 1, 3, and 4, and CSI-RS received by the ue on narrowband channels 1, 3, and 4 are used as wideband CSI-RS, and one CSI corresponding to the wideband is calculated. And the UE transmits the CSI corresponding to the broadband to the network equipment.

In one embodiment of the invention, the wideband-corresponding CSI includes one RI value.

In one embodiment of the present invention, the CSI corresponding to the wideband includes three PMIs as follows:

1) The wideband-corresponding CSI includes a wideband PMI corresponding to the N2 narrowband channels in case that the N2 narrowband channels are continuous or discontinuous narrowband channels. For example, with continued reference to fig. 2, the narrowband channels that were successfully preempted are narrowband channels 1, 3, 4, and narrowband channels 1, 3, 4 are discontinuous narrowband channels. If the narrowband channel that is successfully preempted is narrowband channel 1, 2, 3, narrowband channel 1, 2, 3 is a continuous narrowband channel.

2) The CSI corresponding to the wideband includes a first subband PMI, which is a subband PMI corresponding to N2 narrowband channels.

3) The CSI corresponding to the wideband includes a second subband PMI, where the second subband PMI is a subband PMI corresponding to N2 narrowband channels and a subband PMI corresponding to 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.

and discarding the subband PMIs corresponding to the N1 narrowband channels by the network equipment under the condition that the CSI corresponding to the broadband comprises the second subband PMIs.

As can be seen, for a narrowband channel for which the network device LBT is unsuccessful, the UE may not feedback a subband PMI corresponding to the narrowband channel for which the LBT is unsuccessful; or, the UE may feed back the subband PMI corresponding to the narrowband channel for which LBT is unsuccessful, and the base station may discard the subband PMI corresponding to the narrowband channel for which LBT is unsuccessful fed back by the UE.

In one embodiment of the present invention, the CSI corresponding to the wideband includes the following three kinds of CQIs:

1) The wideband-corresponding CSI includes wideband CQI corresponding to N2 narrowband channels in case that N2 narrowband channels are continuous or discontinuous narrowband channels.

2) The CSI corresponding to the wideband includes a wideband CQI and a first sub-band CQI, which is a sub-band CQI corresponding to N2 narrowband channels.

3) 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 N2 narrowband channels and a subband CQI corresponding to N1 narrowband channels, and the N1 narrowband channels are narrowband channels that are not successfully preempted when the network device LBT the M narrowband channels.

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

As can be seen, for a narrowband channel for which the network device LBT is unsuccessful, the UE may not feedback the subband CQI corresponding to the narrowband channel for which the LBT is unsuccessful; alternatively, the UE may feed back the sub-band CQI corresponding to the narrowband channel for which LBT was unsuccessful, and the base station discards the sub-band CQI corresponding to the narrowband channel for which LBT was unsuccessful fed back by the UE. Wherein, the sub-band CQI is a differential value with respect to the wideband CQI.

Fig. 5 shows a schematic diagram of a channel state information CSI feedback device according to an embodiment of the present invention. The CSI feedback device is applied to a network device, as shown in fig. 5, and the CSI feedback device 300 includes:

a first listen-before-talk module 302, configured to perform listen-before-talk LBT on M narrowband channels respectively;

a first reference signal sending module 304, configured to send channel state information-reference signals CSI-RS on N2 narrowband channels that are successfully preempted in the M narrowband channels, respectively;

the first information receiving module 306 is configured to receive a first CSI corresponding to N1 narrowband channels and a second CSI corresponding to N2 narrowband channels, where N1 and M are positive integers, N1 narrowband channels are narrowband channels with a preemption failure in M narrowband channels, N1, N2 and M are positive integers, and n1+n2=m.

In one embodiment of the invention, the first CSI comprises channel quality indicator, CQI, values that indicate an out of range.

In one embodiment of the present invention, CSI feedback apparatus 300 further includes:

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.

In one embodiment of the present invention, the second CSI includes a channel rank indication RI value, a wideband precoding vector indicator PMI, a wideband CQI value; or, the second CSI includes an RI value, P subband precoding vectors indicate PMI values, and a wideband CQI value; alternatively, the second CSI includes an RI value, a wideband PMI, a wideband CQI value and a Q subband CQI value; alternatively, 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 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.

In one embodiment of the present invention, N3 RI values are shared in N3 second CSI corresponding to N3 narrowband channels, and the third CSI includes one first RI value; in the case that N3 RI values are the same, the first RI value is the same value as N3 RI values; in the case where 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.

In one embodiment of the present invention, N3 second CSI corresponding to N3 narrowband channels have N3 sets of CQI values in total, each set of CQI values in the N3 sets of CQI values includes one wideband CQI value, or each set of CQI values includes one wideband CQI value and Q subband CQI values, and the third CSI includes 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: the minimum CQI value of the N3 sets of CQI values, or the maximum CQI value of the N3 sets of CQI values, or any integer value between the minimum CQI value and the maximum CQI value.

In one embodiment of the present invention, N3 wideband PMI values or Y subband PMI values are shared in N3 second CSI corresponding to N3 narrowband channels, and the third CSI includes N3 wideband PMI values or Y subband PMI values, y=n3×p.

Fig. 6 is a schematic structural diagram of a channel state information CSI feedback apparatus according to another embodiment of the present invention. The CSI feedback device is applied to a user equipment, and as shown in fig. 6, the CSI feedback device 400 includes:

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

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

The first information sending module 406 is configured to send, to a network device, first CSI corresponding to N1 narrowband channels respectively and second CSI corresponding to N2 narrowband channels respectively, where N1 narrowband channels are narrowband channels that the network device fails to preempt when LBT is performed on M narrowband channels, N2 narrowband channels are narrowband channels that the network device succeeds in preempt when LBT is performed on M narrowband channels, N1, N2, and M are positive integers, and n1+n2=m.

Fig. 7 is a schematic structural diagram illustrating a channel state information CSI feedback apparatus according to still another embodiment of the present invention. The CSI feedback device is applied to a network device, as shown in fig. 7, and the CSI feedback device 500 includes:

The reference signal configuration module 502 is 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 504 is configured to perform LBT on M narrowband channels, respectively.

The second reference signal sending module 506 is configured to send second CSI-RS corresponding to 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 508 is configured to receive CSI corresponding to a wideband sent by the user equipment, where the CSI corresponding to the wideband is calculated by second CSI-RS corresponding to N2 narrowband channels.

In one embodiment of the present invention, the CSI corresponding to the wideband includes a wideband PMI corresponding to N2 narrowband channels in case that the N2 narrowband channels are continuous or discontinuous narrowband channels; or, the CSI corresponding to the wideband includes a first subband PMI, where the first subband PMI is a subband PMI corresponding to 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 N2 narrowband channels and a subband PMI corresponding to 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.

In one embodiment of the present invention, CSI feedback apparatus 500 further includes:

and the first information discarding module is used for discarding the subband PMIs corresponding to the N1 narrowband channels when the CSI corresponding to the wideband comprises the second subband PMIs.

In one embodiment of the present invention, the CSI corresponding to the wideband includes wideband CQI corresponding to N2 narrowband channels in case that the N2 narrowband channels are continuous or discontinuous narrowband channels; or, the CSI corresponding to the wideband includes wideband CQI and first subband CQI, where the first subband CQI is subband CQI corresponding to 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 N2 narrowband channels and a subband CQI corresponding to N1 narrowband channels, and the N1 narrowband channels are narrowband channels that are not successfully preempted when the network device LBT the M narrowband channels.

and the second information discarding module is used for discarding the sub-band CQI corresponding to the N1 narrowband channels when the CSI corresponding to the wideband comprises the wideband CQI and the second sub-band CQI.

Fig. 8 is a schematic structural diagram illustrating a channel state information CSI feedback apparatus according to still another embodiment of the present invention. The CSI feedback device is applied to a user equipment, as shown in fig. 8, and the CSI feedback device 600 includes:

The second reference signal receiving module 602 is configured to receive N2 second CSI-RS sent by the network device on N2 narrowband channels, where the N2 second CSI-RS are CSI-RS in M second CSI-RS divided by the first CSI-RS, the first CSI-RS are CSI-RS configured for a wideband, the N2 narrowband channels are narrowband channels that are successfully preempted when the network device performs LBT on M narrowband channels of the wideband respectively, and the M narrowband channels are in one-to-one correspondence with the M second CSI-RS;

an information calculating module 604, configured to calculate CSI corresponding to the wideband according to the N2 second CSI-RSs;

and the second information sending module 606 is configured to send the CSI corresponding to the wideband to the network device.

Fig. 9 is a schematic hardware structure of a user equipment implementing an embodiment of the present invention, where the user equipment 700 includes, but is not limited to: radio frequency unit 701, network module 702, audio output unit 703, input unit 704, sensor 705, display unit 706, user input unit 707, interface unit 708, memory 709, processor 710, and power supply 711. It will be appreciated by those skilled in the art that the user equipment structure shown in fig. 9 does not constitute a limitation of the user equipment, and the user equipment may include more or less components than illustrated, or may combine certain components, or may have a different arrangement of components. In the embodiment of the invention, the user equipment comprises, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer and the like.

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

And 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 a network device, first CSI corresponding to N1 narrowband channels and second CSI corresponding to N2 narrowband channels, where N1 narrowband channels are narrowband channels that the network device fails to preempt when performing LBT on M narrowband channels, 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.

Or,

the radio frequency unit 701 is configured to receive N2 second CSI-RSs transmitted by the network device on N2 narrowband channels, where the N2 second CSI-RSs are CSI-RSs in M second CSI-RSs divided by the first CSI-RS, the first CSI-RS are CSI-RSs configured for wideband, the N2 narrowband channels are narrowband channels that are successfully preempted when the network device performs LBT on the M narrowband channels of the wideband, and the M narrowband channels are in one-to-one correspondence with the M second CSI-RSs.

And a processor 710, configured to calculate CSI corresponding to the wideband according to the N2 second CSI-RS.

And the radio frequency unit 701 is configured to send CSI corresponding to the wideband to the network device.

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

It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 may be used for receiving and transmitting signals during the process of receiving and transmitting information or communication, specifically, receiving downlink data from a base station, and then processing the received downlink data by the processor 710; and, the uplink data is transmitted to the base station. Typically, the radio 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 unit 701 may also communicate with networks and other devices through a wireless communication system.

The user device provides wireless broadband internet access to the user via the network module 702, such as helping the user to send and receive e-mail, browse web pages, and access streaming media, etc.

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. Also, the audio output unit 703 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the user device 700. The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.

The input unit 704 is used for receiving an audio or video signal. The input unit 704 may include a graphics processor (Graphics Processing Unit, GPU) 7041 and a microphone 7042, the graphics processor 7041 processing image data of still pictures or video obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing 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 memory 709 (or other storage medium) or transmitted via the radio 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 may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 701 in the case of a telephone call mode.

The user device 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 that can adjust the brightness of the display panel 7061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 7061 and/or the backlight when the user device 700 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (typically three axes), and can detect the gravity and direction when stationary, and can be used for recognizing the gesture of the user equipment (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; the sensor 705 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., and will not be described again here.

The display unit 706 is used to display information input by a 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 (OLED), or the like.

The user input unit 707 is operable to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the user device. 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, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 7071 or thereabout using any suitable object or accessory such as a finger, stylus, etc.). The touch panel 7071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 710, and receives and executes commands sent from the processor 710. In addition, the touch panel 7071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 707 may include other input devices 7072 in addition to the touch panel 7071. In particular, other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

Further, the touch panel 7071 may be overlaid on the display panel 7061, and when the touch panel 7071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 710 to determine a type of a touch event, and then the processor 710 provides a 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 two independent components for implementing the input and output functions of the user device, in some embodiments, the touch panel 7071 and the display panel 7061 may be integrated to implement the input and output functions of the user device, which is not limited herein.

The interface unit 708 is an interface for an external device to connect with the user equipment 700. For example, the external devices 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 having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 708 may be used to receive input (e.g., data information, power, etc.) from an external device and to transmit the received input to one or more elements within the user equipment 700 or may be used to transmit data between the user equipment 700 and an external device.

The memory 709 may be used to store software programs as well as various data. The memory 709 may mainly include a storage program area that may store an operating system, application programs required for at least one function (such as a sound playing function, an image playing function, etc.), and a storage data area; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, memory 709 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 710 is a control center of the user device, connects various parts of the entire user device using various interfaces and lines, and performs various functions of the user device and processes data by running or executing software programs and/or modules stored in the memory 709 and calling data stored in the memory 709, thereby performing overall monitoring of the user device. Processor 710 may include one or more processing units; preferably, the processor 710 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 710.

The user device 700 may also include a power supply 711 (e.g., a battery) for powering the various components, and the power supply 711 may preferably be logically coupled to the processor 710 via a power management system that performs functions such as managing charge, discharge, and power consumption.

In addition, the user equipment 700 includes some functional modules, which are not shown, and are not described herein.

The embodiment of the invention also provides the user equipment, which comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the computer program realizes the process of the embodiment of the CSI feedback method when being executed by the processor and can achieve the same technical effect, and the repetition is avoided, so that the description is omitted.

The embodiment of the invention also provides a network device, which comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the computer program realizes the process of the embodiment of the CSI feedback method when being executed by the processor and can achieve the same technical effect, and the repetition is avoided, and the description is omitted here.

The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the processes of the CSI feedback method embodiment described above, and can achieve the same technical effects, and in order to avoid repetition, the description is omitted here. Among them, a computer readable storage medium such as Read-Only Memory (ROM), random access Memory (Random Access Memory RAM), magnetic disk or optical disk, and the like.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method of the embodiments of the present invention.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

Claims

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;

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:

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:

respectively carrying out LBT on the M narrowband channels;

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:

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

or,

Or,

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

or,

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

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:

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

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:

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;

or,

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

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

or,

Or,

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.