WO2013166710A1

WO2013166710A1 - Information feedback method, user equipment and base station for coordinated multi-point

Info

Publication number: WO2013166710A1
Application number: PCT/CN2012/075367
Authority: WO
Inventors: 张翼; 王轶; 张健; 徐月巧; 周华
Original assignee: 富士通株式会社
Priority date: 2012-05-11
Filing date: 2012-05-11
Publication date: 2013-11-14

Abstract

Embodiments of the present invention provide an information feedback method for coordinated multi-point, applied to a system in which a user equipment is served by multiple transmission points. The method comprises: for each reference signal resource in a measurement set, a user equipment calculating first feedback information and second feedback information corresponding to the multiple transmission points in different interference scenarios; and sending feedback information comprising the first feedback information and the second feedback information. The embodiments of the present invention not only implement information feedback for coordinated multi-point, but also make a compromise between feedback overhead and system performance.

Description

Multi-point cooperative information feedback method, user equipment and base station

The present invention relates to the field of communications, and in particular, to a multi-point cooperative information feedback method, a user equipment, and a base station. Background technique

In the LTE-A system, a coordinated multi-point (CoMP) transmission technique is introduced to enhance the performance of cell edge users while increasing the average throughput of the cell. The LTE-A R11 mid-downlink CoMP technology standardizes the following three schemes: JT (Joint Transmission), Dynamic Point Selection (DPS), Coordinated Scheduling/Beamforming .

In order to accurately perform link adaptive transmission and effectively obtain the gain of CoMP transmission, the UE needs to feed back accurate PMI/CQI/RI information for different transmission hypotheses. A feedback scheme supporting at least each Channel State Information Reference Signal (CSI-RS) resource is determined in the 3GPP RAN1 67 conference.

However, the inventors have found that, in reality, there is a trade-off between feedback overhead and system performance gain. More feedback information is beneficial to the system to obtain the gain of CoMP transmission. On the other hand, it also increases the overhead of uplink feedback and even affects the coverage of the uplink. At present, the technical solutions for information feedback for multi-point collaboration are not optimized.

It should be noted that the above description of the technical background is only for the purpose of facilitating a clear and complete description of the technical solutions of the present invention and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention. Summary of the invention

The embodiment of the invention provides a multi-point cooperation information feedback method, a user equipment and a base station. The purpose is to achieve information feedback for multi-point collaboration. According to an aspect of the embodiments of the present invention, a method for information feedback of a multi-point collaboration is provided, which is applied to a system in which a plurality of transmission points serve a user equipment, where the method includes:

And calculating, by the user equipment, first feedback information and second feedback information corresponding to the multiple transmission points in different interference scenarios, for each reference signal resource in the measurement set;

Sending feedback information including the first feedback information and the second feedback information.

According to still another aspect of the embodiments of the present invention, an information feedback method for multi-point collaboration is provided, and the method includes:

The base station configures a different feedback parameter set for the user equipment for each reference signal resource, and causes the user equipment to calculate, for each reference signal resource in the measurement set, first feedback information corresponding to multiple transmission points in different interference scenarios. And second feedback information, and sending feedback information including the first feedback information and the second feedback information.

According to still another aspect of the present invention, a user equipment is provided, which is applied to a system in which a plurality of transmission points serve a user equipment, where the user equipment includes:

The information calculation unit calculates, for each reference signal resource in the measurement set, first feedback information and second feedback information corresponding to the plurality of transmission points in different interference scenarios;

The information sending unit sends feedback including the first feedback information and the second feedback information

4 from

According to still another aspect of the embodiments of the present invention, a base station is provided, where the base station includes: an information configuration unit, configured, for each reference signal resource, a different feedback parameter set for the user equipment; Each of the reference signal resources, the first feedback information and the second feedback information corresponding to the plurality of transmission points in different interference scenarios are calculated, and the feedback information including the first feedback information and the second feedback information is sent.

According to still another aspect of an embodiment of the present invention, a computer readable program is provided, wherein when the program is executed in a user device, the program causes a computer to perform multipoint cooperation as described above in the user device Information feedback method.

According to still another aspect of an embodiment of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform an information feedback method of multipoint cooperation as described above in a user equipment.

According to still another aspect of an embodiment of the present invention, a computer readable program is provided, wherein when the program is executed in a base station, the program causes a computer to execute in the base station as The multi-point collaborative information feedback method described above.

According to still another aspect of an embodiment of the present invention, a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a multipoint coordinated information feedback method as described above in a base station.

The beneficial effects of the embodiments of the present invention are: calculating feedback information in different interference scenarios, and performing feedback on multiple reference signal resources. Not only can information feedback under multi-point collaboration be achieved, but a compromise between feedback overhead and system performance can be achieved.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings. It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising" or "comprising", when used herein, refers to the presence of a feature, component, step or component, but does not exclude the presence or addition of one or more other features, components, steps or components. DRAWINGS

Many aspects of the invention can be better understood with reference to the following drawings. The components in the figures are not drawn to scale, but only to illustrate the principles of the invention. In order to facilitate the illustration and description of some parts of the invention, the corresponding parts in the figures may be enlarged or reduced.

Elements and features described in one of the figures or an embodiment of the invention may be combined with elements and features illustrated in one or more other figures or embodiments. In the accompanying drawings, like reference numerals refer to the

1 is a feedback diagram of a base station using 4 transmit antennas and a UE configuration mode 1-1; FIG. 2 is a feedback diagram of a base station using 4 transmit antennas and a UE configuration mode 2-1; FIG. 3 is a schematic diagram of the first embodiment of the present invention. FIG. 4 is a flowchart of a feedback mode 1-0-1 of Embodiment 1 of the present invention; FIG. 5 is a schematic diagram of a feedback structure of a feedback mode 1-0-1 according to Embodiment 1 of the present invention; FIG. 6 is a schematic diagram of a feedback structure of a feedback mode 1-0-2 according to Embodiment 1 of the present invention; FIG. 7 is a first embodiment of the present invention. FIG. 8 is a schematic diagram of a feedback structure of a feedback mode 2-0-1 of Embodiment 1 of the present invention; FIG. 9 is a feedback mode 2-0-2 of Embodiment 1 of the present invention; FIG. 10 is a schematic diagram of a feedback structure of a feedback mode 2-0-3 according to Embodiment 1 of the present invention; FIG. 11 is a schematic diagram of a feedback structure of a feedback mode l-1-la according to Embodiment 1 of the present invention;

12 is a schematic diagram of a feedback structure of a feedback mode l-1-lb according to Embodiment 1 of the present invention;

13 is a schematic diagram of a feedback structure of a feedback mode l-1-2a according to Embodiment 1 of the present invention;

14 is a schematic diagram of a feedback structure of a feedback mode l-1-2b according to Embodiment 1 of the present invention;

15 is a schematic structural diagram of a user equipment according to Embodiment 2 of the present invention;

16 is a flowchart of a multi-point cooperative information feedback method according to Embodiment 3 of the present invention;

Figure 17 is a block diagram showing the configuration of a base station according to a third embodiment of the present invention.

detailed description

The foregoing and other features of the present invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiments of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.

In the LTE Rel.10 system, periodic and aperiodic feedback methods are proposed to provide users with different granularity of feedback information to improve system performance. Feedback information may include a rank indicator (RI, Rank Indicator) precoding matrix indicator (PMI, Precoding Matrix Indicator) channel quality indicator _{(CQI, Channel Quality Indicator) 0} 9, a user supports a transmission mode of periodic feedback modes include: Mode 1 - 0, 2-0, 1-1, 2-1. When PMI/RI is deprecated, the user uses mode 1-0 to feed back the wideband CQI information, or use mode 2-0 to feed back the broadband and subband CQI information; this configuration is applicable to the feedback requirements of the TDD system user.

When PMI/Rr is not deprecated, the user uses mode 1-1 to feed back RI and wideband PMI/CQI information, or use mode 2-1 feedback RI, wideband PMI/CQI and subband CQI, subband identification information. Figure 1 and Figure 2 respectively show that the base station uses 4 transmit antennas, the client configuration mode Equation 1-1, the feedback method used in mode 2-1.

In order to obtain a good compromise between feedback overhead and system performance, the 3GPP RANI 68b conference decided that the user measurement set includes 2 or 3 CSI-RS resources. The present invention provides feedback design for two or three CSI-RS resources, and supports periodic feedback design of CoMP technology.

Example 1

The embodiment of the invention provides an information feedback method for multi-point collaboration, which is applied to the user equipment side. FIG. 3 is a flowchart of a multi-point cooperative information feedback method according to an embodiment of the present invention, which is applied to a system in which multiple transmission points serve a user equipment, and the method includes:

Step 301: The user equipment calculates first feedback information and second feedback information corresponding to multiple transmission points in different interference scenarios for each reference signal resource in the measurement set.

Step 302: The user equipment sends feedback information including the first feedback information and the second feedback information.

In this embodiment, the transmission point may be a macro base station (Macro eNB), a micro base station (such as a Pico eNB, a Femto eNB, etc.), or a remote radio head (RRH). The present invention is not limited thereto, and a specific device can be determined according to actual conditions.

In this embodiment, the measurement set of the user equipment may include multiple reference signal resources corresponding to multiple transmission points; the user equipment may perform feedback configuration independently for each reference signal resource. The multiple reference signal resources may be two or three CSI-RS resources, but are not limited thereto. The specific reference signal or the specific number of resources may also be determined according to actual conditions. The following is an example of CSI-RS.

In this embodiment, the first feedback information and the second feedback information may be calculated in different interference scenarios of multiple transmission points. For example, the first feedback information may be calculated in a scenario in which one of the multiple transmission points performs single-point transmission; the second feedback information may be calculated in a scenario where the transmission point transmits data and other transmission points correspond to resource silence. . However, the present invention is not limited thereto. For example, the first feedback information may be calculated in a single-point transmission scenario, and the second feedback information may be calculated in a scenario where two transmission points transmit data and one transmission point is silent. Specific different interference scenarios can be determined according to actual conditions.

Table 1 is a schematic diagram of feedback information using two CSI-RS resources according to an embodiment of the present invention. As shown in Table 1, the transmission point (TP, Transmission Point) PI and P2 provide services for the user equipment, and two sets of feedback information (such as R PMIi/CQIi and RI ₂ /PMI ₂ /CQI ₂ )o where Rli/PMIi/CQIi can be interfered on, ie calculated by unicast scenario; RI ₂ /PMI ₂ /CQI ₂ can be interference off, ie through the transmission The point is transmitted while the other transmission points are calculated in a scenario where the resources are silent.

Table 1

Thus, as shown in Table 1, 4RI, 4PMI, and 4CQI may be included. In addition, for DPS transmission, Table 1 can be simplified to Table 2, which assumes that for a transmission point, the PMI/RI selected when the interference is turned on and off is the same. Table 2

It is worth noting that although Tables 1 and 2 are feedbacks given for the two transmission points, they are not limited thereto. For example, it can be extended to 3 transmission points: Each transmission point needs to feed back two sets of RI/PMI/CQI, one set of RI/PMI/CQI is calculated by unicast scene, another set of RI/ PMI/CQI is calculated by transmitting data through one transmission point and the other two transmission points are corresponding to the quiet state of the resource. For the specific calculation of the feedback information (for example, RI/PMI/CQI), reference may be made to the prior art, and details are not described herein again.

In this embodiment, since each CSI-RS resource is independently configured, the feedback for each CSI-RS also needs to be configured independently. If the PMI/CQI information of one CSI-RS requires multi-frame feedback, different subframe offsets are used between multiple frames, and the same other configuration. The first frame position is configured by higher layer signaling, and other frame positions are obtained by an implicit method. For example, the information fed back by the two frames is used by the base station for one scheduling and transmission, so that the interval between them is relatively small. For example, the proximity principle can be used, but it is necessary to keep the user feedback in a subframe that can feed back information, such as the user is not in the DTX state.

In this embodiment, in order to support CoMP transmission, a compromise between different feedback overhead and system performance is obtained, and different sub-transmission modes may be configured to the user equipment. Following feedback mode

1-0, 2-0, 1-1, 2-1 are taken as an example for explanation.

(Feedback mode 1-0)

For mode 1-0, only the wideband channel quality indication CQI can be fed back.

In one embodiment, a multi-point coordinated feedback mode 1-0-1 can be configured. The first feedback information may include a first wideband channel quality indicator (wideband CQIi), and the second feedback information may include a second wideband channel quality indicator (wideband CQI ₂ ).

4 is a flowchart of a feedback mode 1-0-1 according to an embodiment of the present invention. For one of the transmission points, the method includes:

Step 401: The user equipment calculates a broadband CQI at the time of unicast transmission and calculates a broadband CQI ₂ when the transmission data is transmitted at the transmission point and the other transmission points correspond to the resource silence _;

Step 402: The user equipment performs differential coding on the broadband and the broadband (^1 ₂ ; in step 403, the user equipment sends the differentially encoded broadband and broadband through one frame.

CQI ₂ .

In the present embodiment, for one CSI-RS resource, CQI1 corresponding to interference on and CQI2 with interference cancellation need to be fed back. To reduce feedback overhead, differential coding can be used and can be used between wideband and wideband CQI ₂ . Specifically, how to perform differential coding can refer to the prior art.

The mapping table of differential coding can be shown as 3.

As shown in Table 3, in the differential encoding mapping table: the offset value is less than or equal to 1, then the difference The channel quality indicator value is 0; the offset value is 2, the differential channel quality indicator value is 1; the offset value is 3, the differential channel quality indicator value is 2; and the offset value is greater than or equal to 4, the differential channel quality indicator is The value is 3.

FIG. 5 is a schematic diagram of a feedback structure of a feedback mode 1-0-1 according to an embodiment of the present invention. As shown in Figure 5, for double code words,

CQI ₁₂ corresponds to two codewords of the first wideband channel quality indication of transmission point P1 (ie corresponding to CSI-RS resource 1); for dual codewords, (51 ₂₁ and (51 ₂₂ correspond to transmission point P1 (ie corresponding CSI-) Two codewords indicated by the second wideband channel quality of RS resource 1), wherein 01 ₁₁ and 01 ₂₁ are 4 bits before differential encoding, CQI ₁₂ and CQI ₂₂ are 3 bits; then differential encoding is performed. (^^ 4 bits, (^1 ₁₂ is 3 bits, CQI ₂₁ Π CQI ₂₂ is 2 bits. Thus, a total of 11 bits can be transmitted by one frame (for example, Format 2, etc.).

In another embodiment, a multi-point coordinated feedback mode 1-0-2 can be configured. The first feedback information may include a first wideband channel quality indicator (wideband CQIi), and when the dual codeword includes CQI _U and CQI ₁₂ , the second feedback information may include a second wideband channel quality indicator (wideband CQI ₂ ), The double code word includes CQI ₂ ^n CQI ₂₂ . And, the broadband and wideband CQI _{2 are} transmitted through two frames.

FIG. 6 is a schematic diagram of a feedback structure of a feedback mode 1-0-2 according to an embodiment of the present invention. As shown in Figure 6,

CQI ₁₂ is a first wideband channel quality indicator corresponding to transmission point P1 (ie, corresponding CSI-RS resource 1), and CQI ₂₁ and CQI ₂₂ are second broadband channel quality indicators corresponding to transmission point P1 (ie, corresponding CSI-RS resource 1) . among them,

CQI ₂₁ 3⁄4 4 bits, 01 ₁₂ and CQI ₂₂ are 3 bits; can be transmitted by two frames (for example, Format 2, etc.).

In another embodiment, a multi-point coordinated feedback mode 1-0-3 can be configured. The first feedback information may include a first wideband channel quality indicator (wideband CQIi), including CQI _U and CQI ₁₂ , and the second feedback information may include a second wideband channel quality indicator (wideband CQI ₂ ), including CQI ₂ n CQI ₂₂ . And, the broadband and wideband CQI _{2 are} transmitted through one frame. The frame is a large-capacity frame, which can be Format 3 or the like.

FIG. 7 is a schematic diagram of a feedback structure of a feedback mode 1-0-3 according to an embodiment of the present invention. As shown in Figure 7,

The CQI ₁₂ is a first wideband channel quality indicator corresponding to the transmission point P1 (ie, corresponding to the CSI-RS resource 1), and the CQI ₂ ^n CQI ₂₂ corresponds to the second broadband channel quality indicator of the transmission point P1 (ie, corresponding to the CSI-RS resource 1). among them,

A bit, CQI ₁₂ n CQI ₂₂ is 3 bits; it can be transmitted by one frame (for example, Format 3, etc.). (Feedback mode 2-0)

For mode 2-0, the wideband channel quality indicator CQI and the subband channel quality indicator CQI can be fed back. For the wideband CQI, the mode 1-0-1 or 1-0-2 or 1-0-3 can be used as described above, and will not be described here; the sub-band CQI will be described below.

In one embodiment, a multi-point coordinated feedback mode 2-0-1 can be configured. The first feedback information may further include a first subband channel quality indicator (subband CQIi), the second feedback information may further include a second subband channel quality indicator (subband CQI ₂ ), and the feedback information may further include a sub In addition, the method further includes: differentially encoding the wideband and subband CQI and the wideband CQI ₂ and the subband CQI ₂ ; and transmitting the subband label and the differentially encoded subband and subband CQI ₂ by one frame.

In the present embodiment, for one CSI-RS resource, the subband with interference on and the CQI ₂ with interference cancellation need to be fed back. In order to reduce the feedback overhead, differential coding can be used, which can be used between wideband CQI and subband CQI, wherein the differentially encoded mapping table can use a mapping table as shown in Table 4.

Table 4

Wherein, in the differential coding mapping table: if the offset value is 0, the differential channel quality indicator value is 0; when the offset value is 1, the differential channel quality indicator value is 1; and the offset value is greater than or equal to 2, The differential channel quality indicator value is 2; the offset value is less than or equal to -1, and the differential channel quality indicator value is 3.

It is to be noted that the contents shown in Table 3 and Table 4 are only illustrative of the differential encoding of the present invention. However, it is not limited to this, and a specific mapping table may be determined according to actual conditions.

FIG. 8 is a schematic diagram of a feedback structure of a feedback mode 2-0-1 according to an embodiment of the present invention. As shown in FIG. 8, in the feedback mode 2-0-1, the wideband CQI can be as described in mode 1-0. For feedback mode 2-0-1, after differential encoding, subband CQI _U , subband CQI ₁₂ , subband CQI _{21 ,} and subband 0^1 ₂₂ may both be 2 bits, and the subband label may be 1-2 bits. , which can be in one frame Transmission.

In another embodiment, a multi-point coordinated feedback mode 2-0-2 can be configured. The first feedback information may further include a first subband channel quality indicator (the subband CQI includes a subband CQI _U and a subband CQI ₁₂ for the dual codeword), and the second feedback information may further include the second subband channel quality. The indication (subband CQI ₂ , subband CQI ₂₁ and subband CQI ₂₂ for dual codewords), and the feedback information may also include subband indication. And, the sub-band flag, sub-band C (3⁄4, and sub-band CQI _{2) are} transmitted through two frames.

FIG. 9 is a schematic diagram of a feedback structure of a feedback mode 2-0-2 according to an embodiment of the present invention. As shown in FIG. 9, in the feedback mode 2-0-2, the wideband CQI can be as described in mode 1-0. For feedback mode 2-0-2, subband CQI _U and subband CQI ₂₁ may be 4 bits, subband CQI ₁₂ and subband CQI ₂₂ may be 3 bits, and subband indication may be 1-2 bits; subband CQI may Transfer through two frames (such as Format 2, etc.).

In another embodiment, a multi-point coordinated feedback mode 2-0-3 can be configured. The first feedback information may further include a first subband channel quality indicator (subband CQIi), the second feedback information may further include a second subband channel quality indicator (subband CQI ₂ ), and the feedback information may further include a sub With the label. Further, a transmission designated subband, a subband CQI ^ and subband CQI _2. The frame is a large-capacity frame, which can be Format 3 or the like.

FIG. 10 is a schematic diagram of a feedback structure of a feedback mode 2-0-3 according to an embodiment of the present invention. As shown in FIG. 10, in feedback mode 2-0-3, the wideband CQI can be as described in mode 1-0. For feedback mode 2-0-3, subband CQIn and subband CQI ₂₁ may be 4 bits, subband CQI ₁₂ and subband CQI ₂₂ may be 3 bits, and subband indication may be 1-2 bits; subband CQI may pass One frame (such as Format 3, etc.) is transmitted.

It is to be noted that Figures 8, 9 and 10 only show the contents of the subband CQI, and the contents of the wideband CQI can be referred to Figs. 5, 6 and 7.

(Feedback mode 1-1)

For mode 1-1, the rank indication RI and the wideband precoding matrix indicate that the PMI/broadband channel quality indicator CQI needs to be fed back.

The first feedback information may include a first rank indication (RI, and the second feedback information may further include a second rank indication (RI ₂ ). When there are different restrictions, the first rank indication and the second rank indication may adopt joint coding. After the rank indication as feedback; or, when having the same limit, One of the rank indication and the second rank indication is used as the rank indication of the feedback, that is, only one RI 4 is fed back

In one embodiment, a multi-point coordinated feedback mode l-l-la can be configured. The feedback information may also include RI and wideband PMI; for wideband CQI, mode 1-0-1 or 1-0-2 may be used as described above, and details are not described herein. The RI and the wideband PMI can be jointly encoded; and the jointly encoded RI and wideband PMI are transmitted through one frame.

In this embodiment, for one CSI-RS resource, the maximum feedback content includes two sets of RI/PMI/CQI, which respectively correspond to the scenarios of interference on and interference off. In order to reduce the feedback overhead, the RIs when the interference is turned on and off can be jointly encoded and then transmitted in one frame.

In order to reduce the feedback overhead, the mode l-1-la can limit the RI/PMI to the same when the interference is turned on and off. The RI and PMI joint coding method is used to feed back the wideband CQI through another frame by using one frame feedback RI/PMI. Here, the period of feedback of the two frames is required to be matched, for example, equal. As for how to perform joint coding, reference can be made to the prior art.

In particular, if the base station side restricts the user equipment to only use rank 1, the user equipment only needs to feed back the PMI information. If the feedback RI does not meet the performance requirements of the system, the technique of sampling under the codebook can be used to reduce the feedback overhead of the PMI.

Specifically, when the base station is configured with 2 antennas, this technology is not needed. When the base station is configured with 4 antennas, 8 of the 16 code words in the codebook can be selected as the PMI optional codewords. This is achieved by signaling with codebook subset restrictions.

FIG. 11 is a schematic diagram of a feedback structure of a feedback mode l-1-la according to an embodiment of the present invention. As shown in Figure 11, the RI and PMI can be combined to encode 5 bits. Or you can limit the RI and only feed back the PMI.

In another embodiment, a multi-point coordinated feedback mode 11-lb can be configured. The first feedback information may include Ri broadband PMIi/CQIi, and the second feedback information may include RI ₂ and broadband PMI ₂ /CQI ₂ . When Rl^n RI ₂ has different restrictions, it can use joint coding as the rank indication of feedback; when it has the same limit, only one RI information is fed back.

In this embodiment, the RI may be transmitted through one frame; the wideband CQIi, the wideband CQI ₂ , the wideband PMI, and the wideband PMI ₂ may be transmitted through another frame. The other frame may use a large-capacity frame, such as a format-3 frame.

FIG. 12 is a schematic diagram of a feedback structure of a feedback mode l-1-lb according to an embodiment of the present invention. Figure 12 As shown, the RI can be fed back in one frame and the wideband PMI/CQI can be fed back in another frame.

In another embodiment, a multi-point coordinated feedback mode 11-2a can be configured. The first feedback information may include the Ri broadband PMIi/CQIi, and the second feedback information may include the RI ₂ and the broadband PMI ₂ /CQI ₂ . When Rl^n RI ₂ has different restrictions, it can use joint coding as the rank indication of feedback; when it has the same limit, only one RI information is fed back. And, sending RI through the first frame; sending through the second frame

Sending CQl!/CQI ₂ through the third frame can be as described in mode 1-0-1 or 1-0-2.

FIG. 13 is a schematic diagram of a feedback structure of a feedback mode 11-2a according to an embodiment of the present invention. As shown in FIG. 13, the feedback mode ll-2a adopts a three-frame structure. In one of the frames, the PMI is 4 bits or 卩^^^^! ^ is 8 bits, except for the difference in subframe offset value, other configurations may be the same as CQI; in another frame, CQI _U may be 4 bits, (3⁄4 ₂ is 3 bits, CQI ₂₁ and CQI ₂₂ is 2 bits) In another frame, joint rank information and the like may be included.

In another embodiment, a multi-point coordinated feedback mode 11-2b can be configured. The first feedback information may include the Ri broadband PMIi/CQIi, and the second feedback information may include the RI ₂ and the broadband PMI ₂ /CQI ₂ . When Rl^n RI ₂ has different restrictions, it can use joint coding as the rank indication of feedback; when it has the same limit, only one RI information is fed back. And, transmitting RI through the first frame; transmitting PM CQIn through the second frame and transmitting PMI ₂ /CQI through the third frame

FIG. 14 is a schematic diagram of a feedback structure of a feedback mode 11-2b according to an embodiment of the present invention. As shown in FIG. 14, the feedback mode ll-2b adopts a three-frame structure. In one frame, 卩^^ is 4 bits and CQIi 3⁄4 (4+3) bits; in another frame, PMI ₂ is 4 bits and CQI ₂ is (4+3) bits, except for subframe offset values. Other configurations may be the same as PMIi/CQI^; in another frame, joint rank information may be included.

(Feedback mode 2-1)

For Mode 2-1, the rank indication, wideband precoding matrix indication/channel quality indication, subband channel quality indication/subband indication need to be fed back. In this embodiment, the RI, wideband PMI/CQI can adopt the feedback mode 1-1 method; the subband CQI/subband indication can adopt the mode 2-0 feedback method.

The first feedback information includes a first rank indication, and the second feedback information includes a second rank indication. When there are different restrictions, the first rank indication and the second rank indication adopt joint coding as a rank indication of feedback; or When having the same limit, the first rank indication and the second rank indication One of them serves as a rank indication of feedback.

In one embodiment, the first feedback information includes a wideband sub-band CQ sub-band indication, and the second feedback information includes a wideband CQI ₂ , a sub-band CQI ₂ / sub-band indication. And the RI/PMI can be restricted to be the same when the interference is turned on and off, and the feedback information can also include the RI and the PMI.

In the present embodiment, for the wideband CQI, the wideband and wideband CQI _{2 may} be differentially encoded; and the differentially encoded wideband and wideband CQI ₂ may be transmitted through one frame _; or, the wideband CQ may be transmitted through two frames (eg, Format 2, etc.) ^ and wideband CQI _2; or, send a wideband C (3⁄4 and subband CQI ₂ ) through a frame (such as Format 3, etc.).

For the subband CQI, the wideband and subband CQI and the wideband CQI ₂ and the subband (51 _{2 may} be differentially encoded; and, through one frame transmission subband indication and differentially encoded subband and subband CQI _2; or, through two frames (e.g. Format 2, etc.) to designated subband, a subband and the subband CQI _2; or by one (e.g., Format 3, etc.) to mark subband, a subband (¾ and subband CQI _2.

For RI and wideband ΡΜΙ, RI and wideband ΡΜΙ are jointly encoded; and, jointly encoded RI and wideband PMI are transmitted through another frame.

In another embodiment, the first feedback information includes a wideband PMIi/CQ subband CQ subband indication, the second feedback information includes a wideband PMI ₂ /CQI ₂ , a subband CQI ₂ /subband indication, and the feedback information further includes an RI.

In this embodiment, the RI is transmitted through one frame; the wideband PMIi, the wideband CQI subband C (3⁄4, the wideband PMI ₂ , the wideband CQI ₂ , the subband CQI _2, and the subband label are transmitted through another frame. The frame can be used in a large capacity. Frames, such as Format 3, etc.

The RI is transmitted through the first frame; the wideband PMIi and the wideband PMI _{2 are} transmitted through the second frame, and the wideband and wideband CQI _{2 are} transmitted through the third frame.

And, the wideband and subband CQIi, and the wideband CQI ₂ and the subband CQI ₂ are differentially encoded, and the subband label and the differentially encoded subband and subband CQI _{2 are} transmitted through another frame; or, the subbands are transmitted through the other two frames. , Subband. (^^ and subband CQI ₂ .

In another embodiment, the first feedback information includes a wideband PMIi/CQ subband CQ The subband is labeled, and the second feedback information includes a wideband PMI ₂ /CQI ₂ , a subband CQI ₂ /subband label, and the feedback information also includes an RI.

The RI is transmitted through the first frame; the wideband and wideband CQI are transmitted through the second frame, and the wideband PMI ₂ and the wideband CQI _{2 are} transmitted through the third frame.

And, the wideband and subband CQI and the wideband CQI ₂ and the subband CQI ₂ are differentially coded, and the subband label and the differentially encoded subband and subband CQI _{2 are} transmitted through another frame; or, the subband label is transmitted through the other two frames, Subband. (^^ and subband CQI ₂ .

The feedback mode under multi-point cooperation has been described above, but it is worth noting that the present invention is not limited thereto, and a specific feedback sub-mode may be determined according to actual conditions.

In this embodiment, when the PMI/CQI uses more than one frame of resource transmission, the feedback resource for transmitting the second frame of the PMI/CQI (that is, the third frame when the RI resource is included) may be configured by the base station side. Or, it may be determined based on information of the first frame in which the PMI/CQI is transmitted (that is, the second frame when the RI resource is calculated).

For example, the uplink resource Cqi-PUCCH-Resourcelndex that transmits the PUCCH may be used, and the sub-band feedback repetition times K may be the same, for example, only the subframe offset is different, and the adjacent subframes that can feed back the CQI. The principle of proximity can also be adopted in the specific implementation.

In this embodiment, the resources of the second feedback information may be configured by the base station side, or may be determined according to resources of the first feedback information.

For example, for a CSI-RS resource, the first set of parameters corresponds to the first type of interference, and the second set of parameters corresponds to the second type of interference; the second set of parameters can be configured by the base station side or by the first The set of parameters is implicitly determined. For the structure of one subframe feedback PMI/CQI, the PMI/CQI determined by the first type of interference scenario can be placed first, and the differential coding is not required for the CQI; the PMI/CQI determined by the second type of interference scenario is placed behind, CQI requires differential coding.

In this embodiment, when the resources of the feedback information collide, if the information types of the resources in which the collision occurs are different, the resources are discarded according to the priority of the information type. Resources can be discarded according to the type priority defined in LTE R10. For example, if two frames collide, one frame contains RI and the other frame contains ΡΜΙ, the information containing ΡΜΙ is discarded.

If the information types of the conflicting resources are the same, the resources may be discarded according to the information of the reference information resource or the information of the configuration parameter set. Among them, according to the index of the CSI-RS resource Sort and discard. For example, if two frames collide, the RI is included in the frame; and the RI of one frame corresponds to the CSI-RS resource 1, and the RI of the other frame corresponds to the CSI-RS resource 2, and the corresponding CSI-RS resource 2 is discarded. information.

Alternatively, the discarding may be performed according to the order of the independently configured parameter sets. When the feedback frame in the pre-configuration parameter set is collated with the feedback frame in the post-configuration parameter set, the feedback frame corresponding to the post-configuration parameter set may be discarded. For example, if the RI of one frame corresponds to the feedback content of the feedback parameter set of the first CSI-RS resource, the RI of the other frame corresponds to the feedback content of the feedback parameter set of the second CSI-RS resource, or other CSIs behind. - The feedback content of the feedback parameter set of the RS resource discards the subsequent RI information.

In a specific implementation, the base station may configure the priority of the parameter configuration set, and then notify the user equipment by using the high layer signaling; wherein the priority may be explicitly sorted in the order of the feedback parameter set of the CSI-RS resource, and then notified to User equipment; The user equipment discards the same type of CSI-RS information according to this priority. However, the present invention is not limited thereto, and a specific embodiment can be determined according to actual conditions.

In this embodiment, when the resource of the feedback information collides, the method may further include: if the rank information in the feedback information is an invalid configuration, first discarding the resource. A description of the invalid configuration can be described later.

In this embodiment, the user equipment may feed back the rank information according to the configuration information of the base station for the rank restriction, and the configuration information is configured by the base station for each reference signal resource. In addition, the base station may also configure different feedback parameter sets for each reference signal resource, for example, configuring a CSI feedback parameter set, including RI, PMI/CQI feedback, etc.; and configuring user equipment feedback through high layer signaling according to the channel characteristics of the user. mode.

In order to guarantee part of the CoMP transmission scheme, such as the performance of JT. The system needs to impose a Rank limit on the user when calculating PMI/CQI based on different CSI-RS resources. For example, use a common rank, or limit to rank 1, or configure a specific rank for the base station (no need to report).

Specifically, the configuration information is configured by the base station according to the number of reference signal resources; when the configuration information is multiple effective configurations, the user equipment feeds back multiple rank information for multiple reference signal resources; when the configuration information is one valid configuration, the user equipment feedback A common rank information; when the configuration information is invalid information, the user equipment does not feed back the rank information.

In this embodiment, the parameters of the LTE-A system periodically feedback to the user are configured in a node. In the structure, feedback of various ranks can be supported in order not to destroy such a structure. The system can be based on

The number of CSI-RS resources is configured independently I-RI configuration. One or all of the reserved configurations in the I-RI are then used to indicate an invalid I-RI configuration, ie no RI information is fed back.

Specifically, when the base station configures multiple valid I-RIs, the user needs to feed back multiple rank information for multiple CSI-RS resources; when the base station configures one valid I-RI, the user needs to feed back a common rank information, The case where the rank limit is 2 or 1 when the PMI/CQI is fed back corresponding to the common rank feedback or the base station configuration; when the base station is not configured with a valid I-RI, the user does not feed back the rank information. It corresponds to the case where the user feedback is limited to rank 1 or the base station configuration feedback PMI/CQI is limited to one.

Table 5 is a diagram showing the relationship between the I-RI and RI periods and the subframe offset of the present invention. Corresponding to Table 7.2.2.1B in TS213, new user behavior is defined.

table 5

It can be seen from the foregoing embodiment that different sub-transmission modes are configured to the user equipment in order to obtain a compromise between different feedback overhead and system performance. In order to further reduce the feedback overhead, techniques such as differential coding, RI joint coding, RI/PMI joint coding, and codebook downsampling are proposed. At the same time, in order to support the technique of restricting the user equipment to transmit the rank, the common rank and the configuration user to transmit the rank, the high layer signaling is proposed to indicate that the user equipment does not need to feed back the rank information. Example 2

The embodiment of the invention provides a user equipment, which is applied to a system in which multiple transmission points serve the user equipment. This embodiment corresponds to the information feedback method of Embodiment 1, and is related to Embodiment 1. The same content will not be described again.

15 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 15, the user equipment 1500 includes: an information computing unit 1501 and an information sending unit 1502. Other parts of the user equipment 1500 are not shown, and reference may be made to the prior art. .

The information calculation unit 1501 is configured to calculate first feedback information and second feedback information corresponding to the multiple transmission points in different interference scenarios for each reference signal resource in the measurement set; the information sending unit 1502 is configured to send The feedback information including the first feedback information and the second feedback information.

In one embodiment, only the wideband CQI may be fed back. The first feedback information includes a first wideband channel quality indicator, and the second feedback information includes a second wideband channel quality indicator; the user equipment performs feedback through feedback mode 1-0.

The user equipment may further include: a first coding unit. The first coding unit differentially encodes the first wideband channel quality indicator and the second wideband channel quality indicator; and the information sending unit sends the differentially encoded first wideband channel quality indicator and the second wideband channel quality indicator by using one frame;

Or the information sending unit sends the first wideband channel quality indicator and the second wideband channel quality indicator by two frames (for example, Format 2 or the like); or sends the first wideband channel quality indicator and the second broadband by using one frame (for example, Format 3, etc.) Channel quality indication.

In another embodiment, the wideband and subband CQI can be fed back. The first feedback information may further include a first sub-band channel quality indicator, the second feedback information may further include a second sub-band channel quality indication, and the feedback information may further include a sub-band indication; the user equipment performs feedback through the feedback mode 2-0.

The user equipment may further include: a second coding unit. The second coding unit differentially encodes the first wideband channel quality indicator and the first subband channel quality indicator, and the second wideband channel quality indicator and the second subband channel quality indicator; and the information sending unit is further configured to pass the first a frame transmission subband indication and a differentially encoded first subband channel quality indicator and a second subband channel quality indicator;

Alternatively, the information sending unit is further configured to send the subband indication, the first subband channel quality indicator, and the second subband channel quality indicator by two frames (for example, Format 2, etc.); or send the subcarrier by using one frame (for example, Format 3, etc.) With label, first sub-band channel quality indicator and second Subband channel quality indication.

In another embodiment, the feedback RI and wideband ΡΜΙ/CQL· feedback information may also include a rank indication and a wideband precoding matrix indication; the user equipment performs feedback through feedback mode 1-1.

The user equipment may further include: a third coding unit that jointly encodes the rank indication and the wideband precoding matrix indication; and the information sending unit is further configured to send the jointly encoded rank indication and the wideband precoding matrix indication by using one frame.

The feedback information further includes a wideband precoding matrix indication. When the transmission point is configured with 4 antennas, the user equipment may further include: a codeword selection unit, and selecting 8 codewords from the 16 codewords in the codebook as the precoding matrix indication. Optional codeword.

Alternatively, the feedback information may further include a rank indication, the first feedback information may further include a first wideband precoding matrix indication, and the second feedback information may further include a second wideband precoding matrix indication; the information sending unit is further configured to send by using one frame a rank indication; transmitting, by another frame, a first wideband channel quality indicator, a second wideband channel quality indicator, a first wideband precoding matrix indication, and a second wideband precoding matrix indication.

Alternatively, the feedback information may further include a rank indication, the first feedback information may further include a first wideband precoding matrix indication, and the second feedback information may further include a second wideband precoding matrix indication; the information sending unit is further configured to use the first frame Transmitting a rank indication; transmitting, by the second frame, the first wideband precoding matrix indication and the second wideband precoding matrix indication; and transmitting, by the third frame, the first wideband channel quality indicator and the second wideband channel quality indicator.

Alternatively, the feedback information may further include a rank indication, the first feedback information may further include a first wideband precoding matrix indication, and the second feedback information may further include a second wideband precoding matrix indication; the information sending unit is further configured to use the first frame Transmitting a rank indication; transmitting, by the second frame, a first wideband precoding matrix indication and a first wideband channel quality indicator; and transmitting, by the third frame, a second wideband precoding matrix indication and a second wideband channel quality indicator.

In another embodiment, RI, wideband PMI/CQI, subband CQI/subband indication can be fed back. The user equipment feeds back through feedback mode 2-1. RI, wideband PMI/CQI can use the feedback mode 1-1 method; subband CQI/subband labeling can use the mode 2-0 feedback method.

In this embodiment, the information sending unit 1302 is further configured to: feed back rank information according to configuration information of the base station for the rank restriction, where the configuration information is used by the base station for each reference signal resource. Line configuration. The configuration information may be configured by the base station according to the number of reference signal resources; when the configuration information is multiple valid information, the information sending unit feeds back multiple rank information for multiple reference signal resources; when the configuration information is one valid information, the information is sent. The unit feeds back a common rank information; when the configuration information is invalid information, the information sending unit does not feed back the rank information. Example 3

The embodiment of the present invention further provides an information feedback method for multi-point cooperation, which is applied to a base station side. The same contents as those of Embodiment 1 will not be described again. FIG. 16 is a flow chart of the information feedback method of the embodiment. As shown in FIG. 16, the method includes:

Step 1601: The base station configures, for each reference signal resource, a different set of feedback parameters for the user equipment.

In this embodiment, according to different feedback parameter sets, the user equipment can perform feedback for each reference signal resource, thereby implementing information feedback under multi-point cooperation. The user equipment may calculate first feedback information and second feedback information corresponding to multiple transmission points in different interference scenarios for each reference signal resource in the measurement set; and send the first feedback information and the second feedback information. Feedback.

In this embodiment, the base station may further configure a feedback mode for the user equipment by using high layer signaling. The specific feedback content corresponding to the feedback mode may be as described in Embodiment 1, and may be the above-mentioned feedback modes 1-1, 2-0, 1-1, 2-1, and their sub-modes. As for the specific high layer signaling or how to configure it, reference may be made to the prior art.

In this embodiment, the base station may further configure configuration information for performing rank restriction for each reference signal resource, so that the user equipment feeds back the rank information according to the configuration information. Moreover, when the configuration information is invalid information, the user equipment does not feed back the rank information; it can be as described in Table 5 in Embodiment 1.

The embodiment of the present invention further provides a base station, and FIG. 17 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in FIG. 17, the base station 1700 includes: an information configuration unit 1701; other parts of the base station 1700 are not shown, and reference may be made to There are technologies.

The information configuration unit 1701 configures different feedback parameter sets for the user equipment for each reference signal resource. Therefore, the user equipment can calculate, for each reference signal resource in the measurement set, first feedback information and a second reverse corresponding to multiple transmission points in different interference scenarios. Feeding information; transmitting feedback information including the first feedback information and the second feedback information.

In this embodiment, the information configuration unit 1701 is further configured to configure a feedback mode for the user equipment by using high layer signaling.

In this embodiment, the information configuration unit 1701 is further configured to configure, for each reference signal resource, configuration information for performing rank restriction, where the configuration information is configured by the base station for each reference signal resource, so that the user equipment feeds back according to the configuration information. Rank information. Moreover, when the configuration information is invalid information, the user equipment does not feed back the rank information.

The configuration information is configured by the base station according to the number of reference signal resources; when the configuration information is multiple valid information, the user equipment feeds back multiple rank information for multiple reference signal resources; when the configuration information is one valid information, the user equipment feeds back one Public rank information; When the configuration information is invalid information, the user equipment does not feed back the rank information.

It can be seen from the above embodiment that the feedback information at the time of interference on and interference off is calculated, and feedback is performed on a plurality of reference signal resources. Not only can information feedback under multi-point collaboration be achieved, but a compromise between feedback overhead and system performance can be achieved.

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to perform an information feedback method of multipoint cooperation as described above in the base station.

Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a multipoint coordinated information feedback method as described above in a base station.

The embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to perform a multipoint coordinated information feedback method as described above in the user equipment.

Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a multipoint coordinated information feedback method as described above in a user equipment.

The above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or a step. The invention also relates to storing the above program Storage media, such as hard disks, disks, discs, DVDs, flash memories, etc.

One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein. An application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that these descriptions are not intended to limit the scope of the invention. A person skilled in the art can make various modifications and changes to the invention in accordance with the spirit and the principles of the invention, which are also within the scope of the invention.

Claims

He'‖ ^

1. A multi-point collaborative information feedback method, applied in a system where multiple transmission points serve user equipment, the method includes:

For each reference signal resource in the measurement set, the user equipment calculates the first feedback information and the second feedback information corresponding to the multiple transmission points in different interference scenarios;

Feedback information including the first feedback information and the second feedback information is sent.

2. The method according to claim 1, wherein the first feedback information is calculated in a scenario where one transmission point among the plurality of transmission points performs single-point transmission; the second feedback information is calculated in the scenario where one of the transmission points performs single-point transmission. Calculated in a scenario where the transmission point transmits data and the corresponding resources of other transmission points are silent.

3. The method according to claim 1, wherein the first feedback information includes a first broadband channel quality indication, and the second feedback information includes a second broadband channel quality indication; the method further includes:

differentially encoding the first wideband channel quality indication and the second wideband channel quality indication; and sending the differentially encoded first wideband channel quality indication and the second wideband channel quality indication through one frame;

Alternatively, the first wideband channel quality indication and the second wideband channel quality indication are sent in two frames; or the first wideband channel quality indication and the second wideband channel quality indication are sent in one frame.

4. The method according to claim 3, wherein in the differential coding mapping table: if the offset value is less than or equal to 1, then the differential channel quality indication value is 0; if the offset value is 2, then the differential channel quality indication value is 1; the offset value is 3, then the differential channel quality indication value is 2; the offset value is greater than or equal to 4, then the differential channel quality indication value is 3.

5. The method according to claim 3, wherein the first feedback information further includes a first sub-band channel quality indication, the second feedback information further includes a second sub-band channel quality indication, and the feedback information further includes Including sub-band identification, the method further includes:

differentially encoding the first wideband channel quality indication and the first subband channel quality indication, and the second wideband channel quality indication and the second subband channel quality indication; and, sending through another frame The subband identifier and the differentially encoded first subband signal Channel quality indicator and second subband channel quality indicator;

Or, send the subband indicator, the first subband channel quality indicator, and the second subband channel quality indicator through another two frames; or send the subband indicator, the first subband channel quality indicator through another frame. with channel quality indication and the second sub-band channel quality indication.

6. The method according to claim 5, wherein in the differential coding mapping table: if the offset value is 0, then the differential channel quality indication value is 0; if the offset value is 1, then the differential channel quality indication value is 1 ; If the offset value is greater than or equal to 2, the differential channel quality indication value is 2; if the offset value is less than or equal to -1, the differential channel quality indication value is 3.

7. The method according to claim 1, wherein the first feedback information includes a first rank indication, the second feedback information includes a second rank indication, and the method further includes:

When there are different constraints, the first rank indication and the second rank indication are jointly encoded as feedback rank indications; or, when there are the same constraints, the first rank indication and the second rank indication are One of them serves as a rank indication for feedback.

8. The method according to claim 7, wherein the feedback information further includes a wideband precoding matrix indication, the first feedback information further includes a first wideband channel quality indication, and the second feedback information further includes a second Broadband channel quality indication; The method further includes:

Jointly encode the rank indication and the wideband precoding matrix indication; transmit the jointly encoded rank indication and the wideband precoding matrix indication through one frame;

Perform differential encoding on the first wideband channel quality indication and the second wideband channel quality indication, and send the differentially encoded first wideband channel quality indication and the second wideband channel quality indication through another frame; or, through another frame The first wideband channel quality indication and the second wideband channel quality indication are sent in two frames.

9. The method according to claim 8, wherein when the transmission point is configured with 4 antennas, the method further includes:

Select 8 codewords from the 16 codewords in the codebook as optional codes indicated by the precoding matrix

10. The method according to claim 8, wherein the first feedback information further includes a first sub-band channel quality indication, the second feedback information further includes a second sub-band channel quality indication, and the feedback information further Including sub-band identification, the method further includes:

combining the first wideband channel quality indication and the first subband channel quality indication, and The second wideband channel quality indication and the second subband channel quality indication are differentially encoded; and, the subband indicator and the differentially encoded first subband channel quality indication and the second subband are sent through one frame. Channel quality indication;

Alternatively, the subband indicator, the first subband channel quality indication and the second subband channel quality indication are sent in two frames.

11. The method according to claim 7, wherein the first feedback information further includes a first wideband channel quality indication and a first wideband precoding matrix indication, and the second feedback information further includes a second wideband channel quality indication. and a second wideband precoding matrix indication, the method further includes:

sending the rank indication through one frame;

The first wideband channel quality indication, the second wideband channel quality indication, the first wideband precoding matrix indication and the second wideband precoding matrix indication are sent through another frame.

12. The method according to claim 1, wherein the first feedback information further includes a first wideband channel quality indication, a first wideband precoding matrix indication and a first subband channel quality indication, and the second feedback information It also includes a second wideband channel quality indication, a second wideband precoding matrix indication and a second subband channel quality indication, and the feedback information also includes a subband indicator; the method further includes:

sending the rank indication through one frame;

sending the first wideband channel quality indication, the second wideband channel quality indication, the first wideband precoding matrix indication, the second wideband precoding matrix indication, and the first subband channel through another frame quality indication, the second subband channel quality indication and the subband label.

13. The method of claim 1, wherein the first feedback information further includes a first wideband channel quality indication and a first wideband precoding matrix indication, and the second feedback information further includes a second wideband channel quality indication. and a second wideband precoding matrix indication, the method further includes:

sending the rank indication via a first frame;

Send the first wideband precoding matrix indication and the second wideband precoding matrix indication through a second frame;

and, sending the first wideband channel quality indication and the second wideband channel through a third frame Quality Indications.

14. The method according to claim 13, wherein the first feedback information further includes a first sub-band channel quality indication, the second feedback information further includes a second sub-band channel quality indication, and the feedback information further Including sub-band identification, the method further includes:

differentially encoding the first wideband channel quality indication and the first subband channel quality indication, and the second wideband channel quality indication and the second subband channel quality indication; and, sending through another frame The subband indicator and the differentially encoded first subband channel quality indicator and the second subband channel quality indicator;

Alternatively, the subband indicator, the first subband channel quality indication and the second subband channel quality indication are sent through another two frames.

15. The method of claim 1, wherein the first feedback information further includes a first wideband channel quality indication and a first wideband precoding matrix indication, and the second feedback information further includes a second wideband channel quality indication. and a second wideband precoding matrix indication, the method further includes:

sending the rank indication via a first frame;

Send the first wideband precoding matrix indication and the first wideband channel quality indication through a second frame;

And, the second wideband precoding matrix indication and the second wideband channel quality indication are sent through a third frame.

16. The method according to claim 15, wherein the first feedback information further includes a first sub-band channel quality indication, the second feedback information further includes a second sub-band channel quality indication, and the feedback information further Including sub-band identification, the method further includes:

17. The method according to any one of claims 13 to 16, wherein the feedback resource of the third frame is configured by the base station side, or is determined based on the information of the second frame.

18. The method according to claim 1, wherein the resources of the second feedback information are configured by the base station side, or are determined based on the resources of the first feedback information.

19. The method according to claim 18, wherein the first feedback information includes a first channel quality indication, and the second feedback information includes a second channel quality indication;

The resource of the first feedback information is located before the resource of the second feedback information; and the first channel quality indication is not differentially encoded, and the second channel quality indication is differentially encoded.

20. The method according to claim 1, wherein when resources of feedback information collide, the method further includes:

If the information types in the colliding resources are the same, the resources are discarded according to the information of the reference information resource or the configuration parameter set; if the information types in the colliding resources are different, the resources are discarded according to the priority of the information type.

21. The method according to claim 1, wherein when resources of feedback information collide, the method further includes:

If the rank information in the feedback information is an invalid configuration, the resource is first discarded.

22. The method according to claim 1, wherein the method further includes: the user equipment feeding back rank information according to the configuration information of the base station on the rank restriction; the configuration information is configured by the base station for each reference signal resource .

23. The method according to claim 22, wherein the method further includes: when the configuration information is invalid information, the user equipment does not feed back rank information.

24. A multi-point collaboration information feedback method, the method includes:

The base station configures different feedback parameter sets for the user equipment for each reference signal resource; causing the user equipment to calculate the first feedback information corresponding to multiple transmission points in different interference scenarios for each reference signal resource in the measurement set. and second feedback information, and send feedback information including the first feedback information and the second feedback information.

25. The method according to claim 24, wherein the method further includes: the base station configuring a feedback mode for the user equipment through high-layer signaling.

26. The method according to claim 24, wherein the method further includes: the base station performs rank-limited configuration information for each reference signal resource configuration, so that the user equipment feeds back rank information according to the configuration information; and , the configuration information is invalid When receiving information, the user equipment does not feed back rank information.

27. A user equipment, applied in a system in which multiple transmission points serve user equipment, and the user equipment includes:

An information calculation unit, for each reference signal resource in the measurement set, calculates the first feedback information and the second feedback information corresponding to the multiple transmission points in different interference scenarios;

Information sending unit, sending feedback including the first feedback information and the second feedback information

4 since

28. The user equipment according to claim 27, wherein the first feedback information includes a first broadband channel quality indication, and the second feedback information includes a second broadband channel quality indication; the user equipment further includes:

A first coding unit differentially codes the first wideband channel quality indication and the second wideband channel quality indication.

29. The user equipment according to claim 28, wherein the first feedback information further includes a first subband channel quality indication, the second feedback information further includes a second subband channel quality indication, and the feedback information It also includes a subband indicator, and the user equipment also includes:

The second encoding unit performs differential coding on the first wideband channel quality indication and the first subband channel quality indication, as well as the second wideband channel quality indication and the second subband channel quality indication.

30. The user equipment according to claim 27, wherein the feedback information further includes a rank indication and a wideband precoding matrix indication, and the method further includes:

The third coding unit jointly codes the rank indication and the wideband precoding matrix indication.

31. A base station, the base station includes:

The information configuration unit configures different feedback parameter sets for the user equipment for each reference signal resource; causing the user equipment to calculate the first response value corresponding to multiple transmission points in different interference scenarios for each reference signal resource in the measurement set. feedback information and second feedback information, and send feedback information including the first feedback information and second feedback information.

32. The base station according to claim 31, wherein the information configuration unit is further configured to configure a feedback mode for the user equipment through high-layer signaling.

33. The base station according to claim 31, wherein the information configuration unit is also used to Configuration information that performs rank restriction on each reference signal resource is configured so that the user equipment feeds back rank information according to the configuration information; and when the configuration information is invalid information, the user equipment does not feed back rank information.

34. A computer-readable program, wherein when the program is executed in the user equipment, the program causes the computer to execute the information of multi-point cooperation as claimed in any one of claims 1 to 23 in the user equipment. Feedback methods.

35. A storage medium storing a computer-readable program, wherein the computer-readable program causes the computer to execute the multi-point collaborative information feedback method according to any one of claims 1 to 23 in the user equipment.

36. A computer-readable program, wherein when the program is executed in a base station, the program causes the computer to execute the multi-point cooperative information feedback method as claimed in any one of claims 24 to 26 in the base station. .

37. A storage medium storing a computer-readable program, wherein the computer-readable program causes the computer to perform the multi-point cooperation information feedback method as claimed in any one of claims 24 to 26 in the base station.