CN105827377B

CN105827377B - Enhanced CA transmission method and device

Info

Publication number: CN105827377B
Application number: CN201510006201.7A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2015-01-07
Filing date: 2015-01-07
Publication date: 2020-09-01
Anticipated expiration: 2035-01-07
Also published as: CN105827377A

Abstract

The invention provides an enhanced CA transmission method and device. As an embodiment, the UE receives K physical layer signaling in the first time window and receives the first signaling in the first subframe in step one. And transmitting the first wireless signal on the second subframe in step two. The physical layer signaling is used for scheduling downlink wireless signal transmission, the physical layer signaling includes CSI indicator bits, the first signaling triggers transmission of a first wireless signal, the first wireless signal includes K sets of CSI reports, and the K sets of CSI reports are triggered by the CSI indicator bits in the K physical layer signaling respectively. The scheme of the invention enables the base station to accurately schedule the serving cell corresponding to the A-CSI and avoids the great increase of the DCI load size. The invention avoids the unpredictable error caused by different understandings of the base station and the UE on the transmission content on the PUSCH. In addition, the invention saves the cost of the PUSCH occupied by the A-CSI.

Description

Enhanced CA transmission method and device

Technical Field

The present invention relates to a scheme of CA (Carrier Aggregation), and in particular, to a scheme of CSI (Channel Status Information) reporting in an enhanced CA based on an LTE (Long Term Evolution) system.

Background

In LTE system R (Release) 10 established by 3GPP (3rd Generation Partner Project), CA is introduced as one of the key technologies, and its core idea is that a User Equipment (UE-User Equipment) can simultaneously operate on multiple carriers, and CA can increase the peak rate of a single UE. In LTE CA, a UE is configured with one Pcell (Primary Cell) and one or more scells (Secondary cells). For FDD (Frequency Division Duplex) LTE, one serving cell includes at least one downlink carrier of { one downlink carrier, one uplink carrier }. For TDD (Time Duplex Division) LTE, one serving cell includes one carrier. In LTE R10, a UE supporting CA can be configured with up to 5 serving cells, and the UE can only transmit PUCCH information on Pcell. In 3GPP R10, CA supports cross-carrier scheduling, i.e., a base station sends downlink signaling on a first carrier to schedule wireless signal transmission on a second carrier. The base station indicates a target Carrier to be scheduled by using a Carrier Indicator Field (CIF) in Downlink Control Information (DCI). CIF is indicated by 3 bits located in the DCI header.

A new research topic (RP-142286), namely enhanced CA, was passed in the 66 th congress (Plenary) of the 3GPP RAN (Radio Access Network). In the enhanced CA problem, the maximum number of serving cells supported increases to 32.

Two CSI reporting mechanisms are defined in LTE, namely, a-CSI (Aperiodic CSI) reporting, which is transmitted on PUSCH (Physical uplink shared CHannel), and periodic CSI reporting, which is typically transmitted on PUCCH (Physical uplink Control CHannel). The a-CSI is triggered by a CSI request bit in an uplink DCI (downlink Control Information) or RARG (Random Access Response Grant) and is transmitted on the uplink DCI or the PUSCH scheduled by the RARG. The CSI request bits comprise 1-2 bits, and when the CSI request bits are 2 bits, the CSI request bits can indicate a serving cell or a CSI process corresponding to A-CSI (detailed description refers to a table Table7.2.1-1A/B/C in TS 36.213).

Disclosure of Invention

The PUSCH in one uplink carrier in enhanced CA is likely to transmit a-CSI for up to 32 downlink carriers. The inventor finds that the base station is difficult to accurately indicate the associated serving cell of the A-CSI (namely, the maintenance serving cell of the downlink channel reflected by the A-CSI) or the CSI process (and the CSI subframe) according to the existing 1-2 CSI request bits. An intuitive idea is to increase CSI request bits (considering that 32 Downlink carriers need to be indicated at most, the required CSI request bits may be higher), however, increasing CSI request bits may cause an increase in DCI payload size, and further reduce the capacity or robustness of PDCCH (Physical Downlink Control Channel)/ePDCCH (enhanced PDCCH). Aiming at the problems, the invention discloses a corresponding scheme.

The invention discloses a method in UE, which comprises the following steps:

-step a. receiving M physical layer signalling in a first time window, receiving a first signalling in a first sub-frame

-step b. transmitting the first wireless signal on the second subframe.

The physical layer signaling is used for scheduling downlink wireless signal transmission, the physical layer signaling includes CSI indicator bits, the first signaling triggers transmission of a first wireless signal, the first wireless signal includes K sets of CSI reports, the K sets of CSI reports are triggered by CSI indicator bits in K physical layer signaling respectively, the K physical layer signaling is a subset of the M physical layer signaling, and K is a positive integer. The first wireless signal is transmitted on a PUSCH.

As an embodiment, the downlink physical layer signaling is one of DCI in a downlink format, where the downlink format includes DCI format {1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 2C, 2D } and a newly defined format for scheduling downlink transmission. As an embodiment, the associated serving cell of the CSI report is a serving cell scheduled by corresponding physical layer signaling. As an embodiment, a set of the CSI reports includes CSI Information for one or more CSI processes, where the CSI Information includes one or more of { RI (Rank Indicator), PTI (Precoding Type Indicator), PMI (Precoding Matrix Information), CQI (Channel quality Indicator) }. As an embodiment, the first time window comprises a positive integer number of consecutive subframes. As an embodiment, the first subframe and the second subframe are the same subframe. As one embodiment, the first subframe is a subframe preceding the second subframe. As an embodiment, the first signaling is DCI in an uplink format (i.e., DCI for scheduling uplink transmission). As an embodiment, the first signaling is semi-persistent scheduling signaling. As an embodiment, the first signaling is NACK transmitted on PHICH (physical harq Indicator Channel). As one example, K is a positive integer less than 33. As an embodiment, K is equal to M, i.e. the K physical layer signalling is the M physical layer signalling.

The inventor finds, through research, that in the existing LTE system, only signaling (DCI in uplink format or RARG) for scheduling PUSCH can trigger a-CSI, because if the triggering signaling of a-CSI and the scheduling signaling of PUSCH occupied by a-CSI are two signaling, there are the following problems:

problem 1. additional signalling overhead

When the UE fails to correctly receive the trigger signaling of the A-CSI and correctly receives the scheduling signaling of the PUSCH, the base station and the UE may have different understandings of the transmission content on the PUSCH, which may cause unpredictable errors.

The method of the present invention triggers the a-CSI by using the DCI in the downlink format, and considers that the CSI indicator bit in the DCI in the downlink format only needs to indicate the a-CSI of the serving cell scheduled by the downlink DCI, and the CSI indicator bit number is small, thereby avoiding the above problem 1. The following features provide a further solution to the above-mentioned problem 2.

Specifically, according to one aspect of the present invention, the first wireless signal further includes indication information of the K sets of CSI reports.

As an embodiment, the indication information of the K sets of CSI reports is cell indexes of the K serving cells, and the K serving cells and the K sets of CSI reports are in one-to-one correspondence. As an embodiment, the indication information of the K sets of CSI reports is L bits, and the L bits are respectively used to indicate whether CSI corresponding to L currently configured active serving cells is carried by a first wireless signal. As an embodiment, the K sets of CSI reports are Concatenated (coordinated) in order from low to high of the cell index of the corresponding serving cell.

The above aspect of the present invention provides a mechanism that the UE sends a serving cell for which the information indication CSI report is directed, avoiding the above problem 2. Further, the above aspect of the present invention provides a degree of freedom for the UE, that is, the UE can autonomously select a part of the serving cells from the serving cells triggered by the base station to transmit a-CSI.

Specifically, according to one aspect of the present invention, K is smaller than M.

The serving cell selection algorithm is UE implementation dependent, and as an embodiment, the UE selects K serving cells (compared with the last CSI reported) with a large CSI change from among the serving cells scheduled by the M physical layer signaling, where the physical layer signaling corresponding to the K serving cells with the large CSI change is the K physical layer signaling. As an embodiment, the UE selects K serving cells (compared with the last CSI reported) with CSI transmission changes from the serving cells scheduled by the M physical layer signaling, where the physical layer signaling corresponding to the serving cells with the larger CSI transmission changes are the K physical layer signaling.

The above aspect saves the overhead of the PUSCH occupied by the a-CSI (especially when the number of downlink carriers currently configured by the UE is much larger than the number of uplink carriers).

Specifically, according to an aspect of the present invention, the step a further includes the steps of:

-step a1. receiving a higher layer signaling to determine a K-group reporting mode, said K-group CSI reports obeying said K-group reporting mode, respectively.

As an embodiment, the reporting mode is one of PUSCH CSI reporting modes {1-2, 2-0, 2-2, 3-0, 3-1 }.

Specifically, according to an aspect of the present invention, the K physical layer signaling is used for scheduling K serving cells, and the K sets of CSI reports correspond to the K serving cells, respectively.

The base station and the UE must have the same understanding of the fact that the CSI report is included in the first radio signal, otherwise the base station may mistake the CSI report on PUSCH (and the indication information of said K sets of CSI reports) for physical layer data. In view of the above problems, the present invention provides the following solutions.

Specifically, according to an aspect of the present invention, the first signaling includes a CSI allowed bit, where the CSI allowed bit is used to indicate whether the indication information is included on the PUSCH scheduled by the first signaling, or the CSI allowed bit is used to indicate whether the CSI report is included on the PUSCH scheduled by the first signaling.

As an embodiment, when the CSI grant bit is 1, it indicates that the indication information is included on the PUSCH scheduled by the first signaling, and when the CSI grant bit is 0, it indicates that the indication information is not included on the PUSCH scheduled by the first signaling.

As an embodiment, the first signaling is DCI in an uplink format, and compared with existing DCI in the uplink format, the CSI request bit field is absent in the first signaling.

As an embodiment, the second subframe is a D-th subframe after an end subframe of the first time window and the second subframe is a first subframe after a start subframe of the first time window satisfying the following condition:

scheduling signaling (i.e. first signaling) including signaling of CSI allowed bits

The CSI allowed bit in the scheduling signaling is shown as yes (i.e. indicating that the indication information is included on the PUSCH of the first signaling schedule or indicating whether the CSI report is on the PUSCH of the first signaling schedule).

Wherein D is 0 or a positive integer.

The advantage of the above scheme is that the base station can decide the PUSCH subframe including the CSI report, providing scheduling freedom at the cost of introducing additional CSI allowed bits, but the cost is almost negligible considering that the existing CSI request bits can be reused.

Specifically, according to one aspect of the present invention, the CSI indication bit is 1 bit, and is used to indicate whether to trigger CSI for a serving cell scheduled by corresponding physical layer signaling.

Specifically, according to one aspect of the present invention, the CSI indication bit is 2 bits for indicating whether to trigger CSI for a serving cell scheduled by corresponding physical layer signaling. The 2 bits are also used to indicate the corresponding CSI process or { CSI process, CSI subframe set } pair, if triggered.

The invention discloses a method in a base station, which comprises the following steps:

-step a. sending M physical layer signalling in a first time window, sending a first signalling in a first sub-frame

-step b. receiving the first wireless signal on the second subframe.

As an embodiment, the first signaling is DCI in an uplink format, and compared with existing DCI in the uplink format, the CSI request bit field is absent in the first signaling. This embodiment can reduce the payload size of the first signaling.

-step a1. sending a high level signaling indicating a K-group reporting mode, said K-group CSI reports obeying said K-group reporting mode, respectively.

Wherein D is 0 or a positive integer.

As an embodiment, the configuration information of the CSI triggered by the CSI indication bit is indicated by higher layer signaling.

The invention discloses a user equipment, which is characterized by comprising:

a first module: for receiving M physical layer signaling in a first time window, receiving a first signaling in a first subframe

A second module: for transmitting the first wireless signal on the second subframe.

As an embodiment, the apparatus above is characterized in that the first module is further configured to: and receiving a high-level signaling to determine a K-group reporting mode, wherein the K-group CSI reports respectively obey the K-group reporting mode.

As an embodiment, the apparatus is characterized in that the first wireless signal further includes indication information of the K sets of CSI reports.

The invention discloses a base station device, which is characterized by comprising:

a first module: for transmitting M physical layer signaling in a first time window, a first signaling in a first subframe

A second module: for receiving the first wireless signal on the second subframe.

As an embodiment, the apparatus above is characterized in that the first module is further configured to: and sending a high-level signaling to indicate a K-group reporting mode, wherein the K-group CSI reports obey the K-group reporting mode respectively.

Compared with the prior art, the method and the device disclosed by the invention have the following advantages:

the base station can accurately schedule the serving cell corresponding to the A-CSI

Avoiding large increases in DCI payload size

Avoid unpredictable errors caused by different understanding of the transmission content on the PUSCH by the base station and the UE

Saving the overhead of PUSCH occupied by a-CSI.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 shows a flow diagram of a-CSI transmission according to one embodiment of the invention;

fig. 2 shows an a-CSI scheduling timing diagram according to an embodiment of the present invention;

fig. 3 is a diagram illustrating a CSI indicator bit number of 2 according to an embodiment of the present invention

Fig. 4 shows a block diagram of a processing device used in a UE according to an embodiment of the invention;

fig. 5 shows a block diagram of a processing device for use in a base station according to an embodiment of the invention;

Detailed Description

The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a flow chart of a-CSI transmission, as shown in fig. 1. In fig. 1, the base station N1 maintains the serving cell for UE U2, and the steps identified in block F1 are optional.

For the bs N1, in step S11, a higher layer signaling is sent to indicate K sets of reporting modes. M physical layer signaling are transmitted in a first time window and a first signaling is transmitted in a first subframe in step S12. The first wireless signal is received on the second subframe in step S13.

For the UE U2, in step S21, the high layer signaling is received to determine K sets of reporting modes. M physical layer signaling are received in a first time window and a first signaling is received in a first subframe in step S22. The first wireless signal is transmitted on the second subframe in step S23.

In embodiment 1, the physical layer signaling is used to schedule downlink wireless signal transmission, the physical layer signaling includes CSI indicator bits, the first signaling triggers transmission of a first wireless signal, the first wireless signal includes K sets of CSI reports, the K sets of CSI reports are triggered by CSI indicator bits in K physical layer signaling respectively, the K physical layer signaling is a subset of the M physical layer signaling, and K is a positive integer. The first wireless signal is transmitted on a PUSCH. The K sets of CSI reports are subject to the K sets of reporting modes, respectively.

As sub-embodiment 1 of embodiment 1, the first wireless signal further includes indication information of the K sets of CSI reports. The indication information is one of:

cell indices of the K serving cells, the K serving cells and the K sets of CSI reports corresponding one to one

L bits, which are respectively used to indicate whether CSI corresponding to the currently configured L active serving cells is carried by the first wireless signal.

As sub-embodiment 2 of embodiment 1, the K physical layer signaling is used to schedule K serving cells, and the K sets of CSI reports correspond to the K serving cells, respectively.

As sub-embodiment 3 of embodiment 1, the CSI indication bit is 1 bit for indicating whether to trigger CSI for a serving cell scheduled by corresponding physical layer signaling.

As sub-embodiment 4 of embodiment 1, the first signaling is DCI in an uplink format or RARG.

As sub-embodiment 5 of embodiment 1, the physical layer signaling is DCI in a downlink format.

Example 2

Embodiment 2 illustrates an a-CSI scheduling timing chart, as shown in fig. 2. In fig. 2, the diagonal line identifies the second subframe, the cross line identifies the previous subframe, and the vertical line identifies the non-CSI subframe.

The base station firstly sends K physical layer signaling to the UE in a first time window, and sends a first signaling to the UE in a first subframe. The UE then transmits the first wireless signal to the base station on the second subframe.

In embodiment 2, the physical layer signaling is used to schedule downlink wireless signal transmission, the physical layer signaling includes CSI indicator bits, the first signaling triggers transmission of a first wireless signal, the first wireless signal includes K sets of CSI reports, the K sets of CSI reports are respectively triggered by the CSI indicator bits in the K physical layer signaling, and K is a positive integer. The first wireless signal is transmitted on a PUSCH. And the CSI allowing bit is used for indicating whether the indication information is included on the PUSCH scheduled by the first signaling or indicating whether the CSI report is included on the PUSCH scheduled by the first signaling. The first subframe in the first window is the (D-1) th subframe before the previous subframe, and the last subframe in the first time window is the D-th subframe before the second subframe. The former subframe is a most recent subframe before the second subframe and meets the following conditions:

scheduling by signalling including CSI-grant bits

The CSI allowed bit in the scheduling signaling is shown as yes, i.e. indicating that the indication information is included on the PUSCH of the first signaling schedule or indicating that the CSI report is included on the PUSCH of the first signaling schedule.

The non-CSI subframes do not satisfy the above two conditions at the same time (i.e., the UE cannot transmit a-CSI and the indication information on the non-CSI subframes).

The CSI allowed bit of the first signaling is shown as yes.

In embodiment 2, T1 and T2 identify (D-1) subframes, respectively. In addition, only the timing relationship is identified in embodiment 2, and the frequency domain relationship is not embodied (for example, the K physical layer signaling in the first time window is transmitted on multiple carriers).

As sub-embodiment 1 of embodiment 2, the first subframe is the last subframe of the first time window, i.e. the D-th subframe before the second subframe.

Example 3

Embodiment 3 illustrates a diagram when the number of CSI indicator bits is 2. The serving cell associated with the CSI indicator bit refers to a serving cell scheduled by the CSI indicator bit carrying physical layer signaling.

According to embodiment 3, when the CSI indicator bit described in the present invention is 00, the a-CSI is not triggered for the associated serving cell. When the CSI indication bit is {01, 10, 11}, the A-CSI triggered by the associated service cell respectively aims at a CSI process or a { CSI process, CSI subframe set } pair of a first set, a CSI process or a { CSI process, a CSI subframe set } pair of a second set, and a CSI process or a { CSI process, a CSI subframe set } pair of a third set. Information of the CSI process or the { CSI process, CSI subframe set } pair is configured by higher layer signaling. The CSI processes or { CSI process, CSI subframe set } pairs of the first set to the third set are configured by high-level signaling.

Example 4

Embodiment 4 illustrates a block diagram of a processing device used in a UE, as shown in fig. 4. In fig. 4, the UE processing apparatus 200 is composed of a receiving module 201 and a transmitting module 202.

The receiving module 201 is configured to receive M physical layer signaling in a first time window, and receive a first signaling in a first subframe. The transmitting module 202 is configured to transmit the first wireless signal on the second subframe.

In embodiment 4, the physical layer signaling is DCI in a downlink format, the physical layer signaling includes CSI indicator bits, the first signaling triggers transmission of a first wireless signal, the first wireless signal includes K sets of CSI reports, the K sets of CSI reports are respectively triggered by the CSI indicator bits in K physical layer signaling, the K physical layer signaling is a subset of the M physical layer signaling, and K is a positive integer. The first wireless signal is transmitted on a PUSCH. The first signaling is DCI of an uplink format or RARG.

As sub-embodiment 1 of embodiment 4, the first module is further to: and receiving a high-level signaling to determine a K-group reporting mode, wherein the K-group CSI reports respectively obey the K-group reporting mode.

As sub-embodiment 2 of embodiment 4, the first wireless signal further includes indication information of the K sets of CSI reports.

Example 5

Embodiment 5 illustrates a block diagram of a processing apparatus used in a base station, as shown in fig. 5. In fig. 5, the base station processing apparatus 300 is composed of a transmitting module 301 and a receiving module 302.

The sending module 301 is configured to send M physical layer signaling in a first time window, and send a first signaling in a first subframe. The receiving module 302 is configured to receive the first wireless signal on the second subframe.

In embodiment 5, the physical layer signaling is used to schedule downlink wireless signal transmission, the physical layer signaling includes CSI indicator bits, the first signaling triggers transmission of a first wireless signal, the first wireless signal includes K sets of CSI reports, the K sets of CSI reports are respectively triggered by CSI indicator bits in K physical layer signaling, the K physical layer signaling is a subset of the M physical layer signaling, and K is a positive integer. The first wireless signal is transmitted on a PUSCH. The K physical layer signaling is used to schedule K serving cells, respectively, and the K sets of CSI reports correspond to the K serving cells, respectively.

As sub-embodiment 1 of embodiment 5, the first module is further to: and sending a high-level signaling to indicate a K-group reporting mode, wherein the K-group CSI reports obey the K-group reporting mode respectively.

As sub-embodiment 2 of embodiment 5, the CSI indication bit is 1 bit for indicating whether to trigger CSI for a serving cell scheduled by corresponding physical layer signaling.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE in the present invention includes but is not limited to a mobile phone, a tablet computer, a notebook, a network card, and other wireless communication devices. The base station in the present invention includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method in a user equipment, comprising the steps of:

-step a. receiving M physical layer signalling in a first time window, receiving a first signalling in a first subframe;

-step b. transmitting the first wireless signal on a second subframe;

the physical layer signaling is used for scheduling downlink wireless signal transmission, the physical layer signaling includes Channel State Information (CSI) indication bits, the first signaling triggers transmission of first wireless signals, the first wireless signals include K groups of CSI reports, the K groups of CSI reports are triggered by the CSI indication bits in K physical layer signaling respectively, the K physical layer signaling is a subset of the M physical layer signaling, and K is a positive integer; the first wireless signal is transmitted on a Physical Uplink Shared Channel (PUSCH); the physical layer signaling is Downlink Control Information (DCI) in a downlink format; the first wireless signal further includes indication information of the K sets of CSI reports, or the step a further includes the steps of:

2. The method of claim 1, wherein the K physical layer signaling is used for scheduling K serving cells respectively, and wherein the K sets of CSI reports correspond to the K serving cells respectively.

3. The method of claim 1, wherein a CSI permission bit is included in the first signaling, and wherein the CSI permission bit is used for indicating whether the indication information is included on a PUSCH scheduled by the first signaling or indicating whether the CSI report is included on a PUSCH scheduled by the first signaling.

4. The method of claim 1 or 2, wherein the CSI indication bit is 1 bit for indicating whether to trigger CSI for a serving cell scheduled for corresponding physical layer signaling.

5. The method according to claim 1 or 2, wherein the CSI indication bit is 2 bits for indicating whether to trigger CSI for a serving cell scheduled for corresponding physical layer signaling; the 2 bits are also used to indicate the corresponding CSI process or { CSI process, CSI subframe set } pair, if triggered.

6. A method in a base station, comprising the steps of:

-step a. sending M physical layer signalling in a first time window, sending a first signalling in a first subframe;

-step b. receiving the first wireless signal on a second subframe;

7. The method of claim 6, wherein the K physical layer signaling is used for scheduling K serving cells respectively, and wherein the K sets of CSI reports correspond to the K serving cells respectively.

8. The method of claim 6, wherein a CSI permission bit is included in the first signaling, and wherein the CSI permission bit is used for indicating whether the indication information is included on a PUSCH scheduled by the first signaling or indicating whether the CSI report is included on a PUSCH scheduled by the first signaling.

9. The method of claim 6 or 7, wherein the CSI indication bit is 1 bit for indicating whether to trigger CSI for a serving cell scheduled for corresponding physical layer signaling.

10. The method according to claim 6 or 7, wherein the CSI indication bit is 2 bits for indicating whether to trigger CSI for a serving cell scheduled for corresponding physical layer signaling; the 2 bits are also used to indicate the corresponding CSI process or { CSI process, CSI subframe set } pair, if triggered.

11. A user equipment, characterized in that the equipment comprises:

a first module: receiving M physical layer signaling in a first time window, receiving a first signaling in a first subframe;

a second module: for transmitting a first wireless signal on a second subframe;

the physical layer signaling is used for scheduling downlink wireless signal transmission, the physical layer signaling includes Channel State Information (CSI) indication bits, the first signaling triggers transmission of first wireless signals, the first wireless signals include K groups of CSI reports, the K groups of CSI reports are triggered by the CSI indication bits in K physical layer signaling respectively, the K physical layer signaling is a subset of the M physical layer signaling, and K is a positive integer; the first wireless signal is transmitted on a Physical Uplink Shared Channel (PUSCH); the physical layer signaling is Downlink Control Information (DCI) in a downlink format; the first wireless signal further includes indication information of the K sets of CSI reports, or the first module is further configured to: and receiving a high-level signaling to determine a K-group reporting mode, wherein the K-group CSI reports respectively obey the K-group reporting mode.

12. A base station apparatus, characterized in that the apparatus comprises:

a first module: the device comprises a first time window and a second time window, wherein the first time window is used for transmitting M physical layer signaling and the second time window is used for transmitting first signaling;

a second module: for receiving a first wireless signal on a second subframe;

the physical layer signaling is used for scheduling downlink wireless signal transmission, the physical layer signaling includes Channel State Information (CSI) indication bits, the first signaling triggers transmission of first wireless signals, the first wireless signals include K groups of CSI reports, the K groups of CSI reports are triggered by the CSI indication bits in K physical layer signaling respectively, the K physical layer signaling is a subset of the M physical layer signaling, and K is a positive integer; the first wireless signal is transmitted on a Physical Uplink Shared Channel (PUSCH); the physical layer signaling is Downlink Control Information (DCI) in a downlink format; the first wireless signal further includes indication information of the K sets of CSI reports, or the first module is further configured to: and sending a high-level signaling to indicate a K-group reporting mode, wherein the K-group CSI reports obey the K-group reporting mode respectively.