CN107733506B

CN107733506B - CSI processing method, CSI measurement pilot frequency resource transmission method and device

Info

Publication number: CN107733506B
Application number: CN201610669242.9A
Authority: CN
Inventors: 肖华华; 李儒岳; 吴昊; 陈艺戬; 蔡剑兴; 鲁照华; 王瑜新
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-08-12
Filing date: 2016-08-12
Publication date: 2022-08-02
Anticipated expiration: 2036-08-12
Also published as: CN107733506A

Abstract

The invention provides a method and a device for processing CSI (channel state information) and transmitting measurement pilot frequency resources, wherein the processing method comprises the following steps: a terminal receives a first measurement pilot frequency resource and obtains first CSI according to the first measurement pilot frequency resource; and the terminal receives a second measurement pilot frequency resource and obtains second CSI according to the second measurement pilot frequency resource and the first CSI. By adopting the technical scheme, the problem that in the related technology, the two RI values obtained by independently measuring and calculating the received pilot frequency resources sent by the base station twice by the terminal are possibly different, so that the base station cannot perform accurate scheduling and data transmission according to the CSI fed back by the terminal is solved, and the terminal can be ensured to send correct channel state information to the base station.

Description

CSI processing method, CSI measurement pilot frequency resource transmission method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for processing CSI and transmitting measurement pilot resources.

Background

The multi-antenna technology is a key technology for improving the robustness of a wireless link or improving the spectrum efficiency in the field of wireless communication. One principle of the multi-antenna technology is that a plurality of characteristics of channels are utilized to form multi-layer transmission matched with the characteristics of the channels, the radiation direction of signals is very targeted, the system performance can be effectively improved, and remarkable performance improvement is achieved on the basis of not increasing the bandwidth and the power. How to obtain Channel State Information (CSI) matched to a Channel (e.g., precoding matrix, Channel rank, Channel quality information) is very important in the multi-antenna technology, and it largely determines the data transmission performance of the multi-antenna system. The obtaining of the channel state information mainly depends on the measurement and feedback of the channel information, so the measurement and feedback of the channel information are the core content of the multi-antenna technology, and how to guarantee the accuracy, overhead and robustness of the channel measurement and the channel information feedback becomes an important problem.

The measurement and feedback of the channel state information are designed to be simpler in an early Long Term Evolution (LTE) system version, but as the accuracy requirement is higher and higher, the pilot frequency overhead, feedback overhead and quantization complexity are not expected to increase significantly, so that the measurement and feedback technology of the channel state information becomes more and more complex to pursue higher quantization efficiency; in addition, because the antenna configuration has better adaptability to various different scenes, a great amount of new designs are introduced. The basic contents related to the channel state information measurement and quantization feedback are briefly introduced here:

channel state information CSI (RI/PMI/CQI) feedback content

The channel state information feedback content comprises: channel quality indication information (CQI for short), Precoding Matrix Indicator (PMI for short), and Rank Indicator (RI for short). The CQI is an index for measuring the quality of the downlink channel. In the 36-213 protocol, the CQI is represented by an integer value of 0-15, and respectively represents different CQI grades, and different CQIs correspond to respective modulation modes and coding rates. The RI is used to describe the number of spatially independent channels, corresponding to the rank of the channel response matrix. In the open-loop spatial multiplexing mode and the closed-loop spatial multiplexing mode, the terminal needs to feed back the RI information, and in other modes, the RI information does not need to be fed back. The channel matrix has a rank corresponding to the number of layers. The PMI feeds back the best precoding information, and indicates the code word which is most matched with the characteristics of the current channel in the appointed codebook based on index feedback. The standard supports configuration of a Codebook used by each terminal through a Codebook Subset Restriction function (Codebook Subset Restriction).

Enhanced Multiple Input Multiple Output Type (e-MIMO Type for short):

e-MIMO Type, also called channel state information category, includes two types: class a and Class B.

Class A: the method comprises the steps that a base station sends a Channel State information Reference Signal (CSI-RS), generally a non-precoded CSI-RS (NP CSI-RS), and a terminal directly carries out Channel measurement and CSI quantization based on the CSI-RS to obtain RI/PMI/CQI, and feeds back the CSI on a periodic or non-periodic uplink Channel.

Class B: the CSI-RS sent by the base station is generally a precoded CSI-RS (BFed CSI-RS), and is classified as Class B K >1 or Class B K ═ 1, for Class B K >1, the base station sends K sets of precoded CSI-RS resources, and the terminal may need to select the precoded pilot first and then perform quantization feedback of channel information based on the selected CSI-RS pilot, where the CSI-RS resources include channel state information reference pilot resource index (CRI) selection information, the CRI corresponds to one CSI-RS resource, the index of the resource is known, and the base station also knows precoding information corresponding to the CSI-RS resource. And RI/PMI/CQI information corresponding to the selected CSI-RS measurement resource subset; for Class B K ═ 1, the base station sends a set of precoded CSI-RS resources, where the precoded CSI-RS resources include K CSI-RS port groups, and each CSI-RS port group corresponds to a precoding matrix (vector). And the terminal obtains the CSI by measuring the set of precoded CSI-RS resources and feeds back the CSI.

The pilots used for measuring the channel state information are referred to as measurement pilots, and the pilots used for measuring the channel state information, such as CSI-RS, NP CSI-RS, BFed CSI-RS, etc., may be referred to as measurement pilots, and may be named otherwise in different standards.

CSI feedback mode

The CSI feedback mode (feedback mode) refers to a combination of CSI (CQI/PMI/RI) feedback commands, and includes subband feedback and wideband feedback or M-subband feedback selection, and the like, with periodic feedback and aperiodic feedback. Wherein, the aperiodic feedback is transmitted in a Physical Uplink Shared Channel (PUSCH for short). The periodic feedback refers to a mode that is periodically fed back in a Physical Uplink Control Channel (PUCCH).

Channel state information Process (CSI Process)

The 3GPP also introduces a concept of CSI Process, where the base station may configure multiple CSI processes for the terminal, each CSI Process is equivalent to a channel state information measurement and feedback Process, and each CSI Process is independent and may perform parameter configuration respectively. For example, 1 Process is supported in the transmission mode 9, and a maximum of 4 processes can be supported in the transmission mode 10. The configuration of each CSI Process defines the configuration of a channel measurement part, the configuration of an interference measurement part and a feedback mode, and the interference measurement part may be a single interference measurement configuration or a configuration of an interference measurement list. The CSI Process configuration may further include some other configuration information, such as pilot power information, bitmap indication information of Codebook Restriction (Codebook Subset Restriction), indication information of 4Tx Codebook version selection, and the like.

In the related art, in order to obtain a precoding matrix of a BFed CSI-RS, a base station may implement two e-MIMO types in a frequency division multiplexing system, where in a first e-MIMO Type, the base station sends a non-precoded measurement pilot resource (e.g., CSI-RS), and a terminal measures and feeds back channel state information CSI1 (including PMI1 and/or CRI1, RI1, and CQI1 may not be calculated and fed back) of the non-precoded CSI-RS, and in a second e-MIMO Type, the base station obtains a precoding matrix by using precoding information (PMI and/or CRI) fed back by the first e-MIMO Type to act on the CSI-RS, and sends the set of precoded CSI-RS. And the terminal measures the precoded CSI-RS corresponding to the second e-MIMO Type, obtains the CSI2 and feeds back the CSI2(PMI2, CQI2 and RI 2). Here, two eMIMO types correspond to one channel state information CSI, respectively. Wherein, PMI1 and/or CQI1 are calculated based on the value of RI 1. And PMI2 and/or CQI2 are calculated based on the value of RI 2. Since the RI1 is calculated based on the non-precoded CSI-RS and the RI2 is calculated based on the precoded CSI-RS, the two may have a difference, which occurs when the RI1 and the RI2 independently calculate and take values, and the difference of the channel state information expressed based on the channel state information calculated by the CSI-RS resource corresponding to the first e-MIMO Type and the CSI-RS resource corresponding to the second e-MIMO Type is relatively large, which is not favorable for the base station to perform reasonable scheduling and data transmission according to the channel state information fed back by the terminal.

Aiming at the problem that in the related art, a terminal respectively and independently measures and calculates the received pilot frequency resources of two times of measurement sent by a base station, and the two obtained RI values are possibly different, so that the base station cannot perform accurate scheduling and data transmission according to CSI fed back by the terminal, an effective solution is not provided.

Disclosure of Invention

The embodiment of the invention provides a method and a device for processing CSI (channel state information) and transmitting measurement pilot frequency resources, and at least solves the problem that in the related technology, a terminal respectively and independently measures and calculates the received twice measurement pilot frequency resources sent by a base station, and two obtained RI values are possibly different, so that the base station cannot perform accurate scheduling and data transmission according to the CSI fed back by the terminal.

According to an aspect of the present invention, there is provided a method for processing channel state information CSI, including:

a terminal receives a first measurement pilot frequency resource and obtains first CSI according to the first measurement pilot frequency resource;

and the terminal receives a second measurement pilot frequency resource and obtains second CSI according to the second measurement pilot frequency resource and the first CSI.

Optionally, the first measurement pilot resource and the second measurement pilot resource belong to the same channel state information process.

Optionally, the first CSI comprises at least one of: a first channel rank RI, a first measurement pilot resource index CRI, a first channel quality indication CQI.

Optionally, the first CSI further includes: a first precoding matrix index, PMI, wherein the first PMI includes at leastOne of them is: first codebook index i of first precoding matrix ₁ A first codebook first dimension index i of a first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ 。

Optionally, the second CSI comprises at least one of: a second RI, a second CQI, a second PMI, wherein the second PMI includes at least one of: first codebook index i of the second precoding matrix ₁ A second codebook index i of a second precoding matrix ₂ 。

Optionally, obtaining the second CSI according to the second measurement pilot resource and the first CSI includes:

and determining the value of the second RI according to the value of the first RI.

Optionally, a value of the second RI is determined according to a value of the first RI, and includes at least one of:

the value of the second RI is equal to the value of the first RI;

the value of the second RI is less than that of the first RI, and the value of the second RI is greater than or equal to 1;

and the value of the second RI and the value of the first RI belong to the same channel rank set, and the set comprises at least one positive integer.

Optionally, the set of channel ranks comprises a set of at least one of: {1,2},{3,4},{5,6,7,8},{1,2,3,4},{5,6},{7,8}.

obtaining a second CQI according to the second measurement pilot resource and the first CSI, wherein the first CSI comprises at least one of the following: a first RI, a first CRI.

Optionally, the terminal feeds back the first CSI and the second CSI through a physical uplink channel, where the physical uplink channel includes at least one of: a physical uplink control channel PUCCH and a physical uplink shared channel PUSCH.

Optionally, the terminal feeds back the first CSI and the second CSI through a physical uplink channel, including:

the terminal feeds back first CSI at a first time and second CSI at a second time through a PUSCH, wherein the first CSI comprises at least one of the following: the first RI, the first CRI and the first PMI, and the second CSI comprises at least one of the following components: a second CQI, a second RI, and a second PMI.

the terminal feeds back the first CSI periodically through a PUCCH;

and the terminal feeds back the second CSI through a PUSCH.

Optionally, the terminal periodically feeds back different report information at different time instants through the PUCCH, where the report information includes at least one of: the first RI, the first PMI, the first CRI, the second RI, the second CQI and the second PMI.

Optionally, the report information including the first CSI and the report information including the second CSI have the same feedback parameter configuration, wherein the feedback parameter configuration includes at least one of: channel rank configuration index ri-ConfigIndex, channel quality information precoding matrix index configuration index cqi-pmi-ConfigIndex.

Optionally, the feedback priority of the reporting information containing the first CSI is higher than the feedback priority of the reporting information containing the second CSI.

Optionally, the feedback manner of the report information includes at least one of:

feedback mode a ₁ : periodically feeding back report information a ₁₁ And report information a ₁₂ Wherein the report information a ₁₁ Including at least one of: a first RI, a first PMI; the report information a ₁₂ Including at least one of: a second PMI, a second CQI;

feedback mode a ₂ : periodically feeding back report information a ₂₁ Report information a ₂₂ And report information a ₂₃ Wherein the report information a ₂₁ The method comprises the following steps: first RI, the report information a ₂₂ The method comprises the following steps: first, theA PMI; the report information a ₂₃ Including at least one of: a second PMI, a second CQI;

feedback mode a ₃ : periodically feeding back report information a ₃₁ Report information a ₃₂ And report information a ₃₃ Wherein the report information a ₃₁ Including at least one of: a first RI and a first PMI; the report information a ₃₂ The method comprises the following steps: a second RI; the report information a ₃₃ Including at least one of: a second PMI, a second CQI;

feedback mode a ₄ : periodically feeding back report information a ₄₁ Report information a ₄₂ Report information a ₄₃ And report information a ₄₄ Wherein the report information a ₄₁ The method comprises the following steps: a first RI; the report information a ₄₂ The method comprises the following steps: a first PMI; the report information a ₄₃ The method comprises the following steps: a second RI; the report information a ₄₄ Including at least one of: a second PMI, a second CQI;

feedback mode a ₅ : periodically feeding back report information a ₅₁ Report information a ₅₂ And report information a ₅₃ Wherein the report information a ₅₁ Including at least one of: a first RI, a first PMI; the report information a ₅₂ Including at least one of: a second RI, a second precoding matrix first codebook index i 1; the report information a ₅₃ Including at least one of: a second precoding matrix, a second codebook index i2, and a second CQI;

feedback mode a ₆ : periodically feeding back report information a ₆₁ Report information a ₆₂ Report information a ₆₃ And report information a ₆₄ Wherein the report information a ₆₁ The method comprises the following steps: a first RI; the report information a ₆₂ The method comprises the following steps: a first PMI; the report information a ₆₃ Including at least one of: second RI, first codebook index i of second precoding matrix ₁ (ii) a The report information a ₆₄ Including at least one of: second codebook index i of second precoding matrix ₂ A second CQI;

feedback mode b ₁ : periodically feeding back report information b ₁₁ Report information b ₁₂ And report information b ₁₃ Wherein the report information b ₁₁ The method comprises the following steps: a first CRI; the report information b ₁₂ Including at least one of: a second RI, a first PMI; the report information b ₁₃ Including at least one of: a second PMI, a second CQI;

feedback mode b ₂ : periodically feeding back report information b ₂₁ Report information b ₂₂ Report information b ₂₃ And report information b ₂₄ Wherein the report information b ₂₁ The method comprises the following steps: a first CRI; the report information b ₂₂ The method comprises the following steps: a second RI; the report information b ₂₃ The method comprises the following steps: a first PMI; the report information b ₂₄ Including at least one of: a second PMI, a second CQI;

feedback mode b ₃ : periodically feeding back report information b ₃₁ Report information b ₃₂ And report information b ₃₃ Wherein the report information b ₃₁ Including at least one of: a first CRI, a first RI; the report information b ₃₂ The method comprises the following steps: a first PMI; the report information b ₃₃ Including at least one of: a second PMI, a second CQI;

feedback mode b ₄ : periodically feeding back report information b ₄₁ Report information b ₄₂ Report information b ₄₃ And report information b ₄₄ Wherein the report information b ₄₁ Including at least one of: a first CRI, a first RI; the report information b ₄₂ The method comprises the following steps: a first PMI; the report information b ₄₃ The method comprises the following steps: a second RI; the report information b ₄₄ Including at least one of: a second PMI, a second CQI;

feedback mode b ₅ : periodically feeding back report information b ₅₁ Report information b ₅₂ Report information b ₅₃ And report information b ₅₄ Wherein the report information b ₅₁ Including at least one of: a first CRI1 and a first RI; the report information b ₅₂ Includes a first PMI; the report information b ₅₃ Comprises the following stepsOne of them is as follows: second RI, first codebook index i of second precoding matrix ₁ (ii) a The report information b ₅₄ Including at least one of: second codebook index i of second precoding matrix ₂ And a second CQI.

According to another aspect of the present invention, there is also provided a transmission method of a measurement pilot resource, including:

a base station sends a first measurement pilot frequency resource;

the base station receives first CSI fed back by the terminal according to the first measurement pilot frequency resource;

and the base station determines parameters of a second measurement pilot according to the first CSI and sends a second measurement pilot resource according to the determined parameters of the second measurement pilot, wherein the second measurement pilot resource is used for the terminal to obtain second CSI according to the second measurement pilot and the first CSI.

Optionally, the first CSI comprises at least one of: a first RI, a first measurement pilot resource index, CRI.

Optionally, the first CSI further includes: a first precoding matrix index, PMI, wherein the first PMI comprises at least one of: first codebook index i of first precoding matrix ₁ A first codebook first dimension index i of a first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ 。

Optionally, the determining, by the base station, a parameter of a second measurement pilot resource according to the first CSI includes:

and the base station determines the number of ports of the second measurement pilot frequency resource according to the value of the first RI.

Optionally, the determining, by the base station, the number of ports of the second measurement pilot resource according to the value of the first RI includes:

when the value of the first RI is 1, determining that the number of the ports of the second measurement pilot frequency resource is 2;

and when the value of the first RI is an integer greater than 1, determining that the number of the ports of the second measurement pilot frequency resource is an even number greater than 2.

Optionally, the determining, by the base station, the parameter of the second measurement pilot resource according to the first CSI includes:

the base station determines a precoding matrix of the second measurement pilot resource according to the first CSI, wherein the first CSI comprises at least one of the following: a first PMI and a first CRI.

According to another aspect of the present invention, there is also provided a device for processing channel state information CSI, which is applied to a terminal, and includes:

a first receiving module, configured to receive a first measurement pilot resource and obtain first CSI channel state information according to the first measurement pilot resource;

and the second receiving module is used for receiving a second measurement pilot resource and obtaining second CSI according to the second measurement pilot resource and the first CSI.

Optionally, the first CSI comprises at least one of: a first channel rank, RI, a first CSI reference pilot resource index, CRI, a first channel quality indication, CQI.

Optionally, the first CSI further includes: a first precoding matrix index, PMI, wherein the first PMI comprises at least one of: a first codebook index i1 of the first precoding matrix, a first codebook first dimension index i of the first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ 。

Optionally, the second CSI comprises at least one of: a second RI, a second CQI, and a second PMI, wherein the second PMI includes at least one of: first codebook index i of the second precoding matrix ₁ A second codebook index i of a second precoding matrix ₂ 。

Optionally, the apparatus further comprises:

and the first determination module is used for determining the value of the second RI according to the value of the first RI.

the value of the second RI is equal to the value of the first RI;

Optionally, the second receiving module further includes an obtaining unit, configured to obtain a second CQI according to the second measurement pilot resource and the first CSI, where the first CSI includes at least one of: a first RI, a first CRI.

Optionally, the apparatus further comprises a feedback module, the feedback module comprising:

a first feedback unit, configured to periodically feed back the first CSI through a physical uplink control channel PUCCH;

and the second feedback unit is used for feeding back the second CSI through a Physical Uplink Shared Channel (PUSCH).

According to another aspect of the present invention, there is also provided a transmission apparatus for measuring pilot resources, which is applied to a base station, and includes:

a first sending module, configured to send a first measurement pilot resource;

a third receiving module, configured to receive a first CSI fed back by the terminal according to the first measurement pilot resource;

a second determination module: parameters for determining a second measurement pilot resource according to the first CSI;

a second sending module, configured to send the second measurement pilot resource according to the determined parameter of the second measurement pilot resource, where the second measurement pilot resource is used to instruct the terminal to obtain second CSI according to the second measurement pilot resource and the first CSI.

Optionally, the first CSI comprises at least one of: a first RI, a first CSI reference pilot resource index, CRI.

Optionally, the apparatus further includes a third determining module, configured to determine, according to a value of the first RI, the number of ports of the second measurement pilot resource.

Optionally, the apparatus further includes a fourth determining module, configured to determine a precoding matrix of the second measurement pilot resource according to the first CSI, where the first CSI includes at least one of: a first PMI and a first CRI.

According to another aspect of the present invention, there is also provided a terminal, including: a first processor; a first memory for storing instructions executable by the first processor;

the first processor is configured to perform the following operations in accordance with instructions stored in the first memory:

receiving a first measurement pilot frequency resource, and obtaining first CSI according to the first measurement pilot frequency resource;

According to another aspect of the present invention, there is also provided a base station, including: a second processor; a second memory for storing instructions executable by the second processor;

the second processor is configured to perform the following operations in accordance with instructions stored in the second memory:

transmitting a first measurement pilot resource;

receiving first CSI fed back by the terminal according to the first measurement pilot frequency resource;

and determining parameters of a second measurement pilot according to the first CSI, and sending the second measurement pilot resource according to the determined parameters of the second measurement pilot, wherein the second measurement pilot resource is used for the terminal to obtain second CSI according to the second measurement pilot and the first CSI.

According to the invention, the terminal can receive the first measurement pilot frequency resource and obtain the first CSI according to the first measurement pilot frequency resource; the technical scheme is adopted, and the problem that in the related art, the base station cannot perform accurate scheduling and data transmission according to the channel state information fed back by the terminal due to the fact that the two RI values obtained by independently measuring and calculating the received twice measurement pilot frequency resources sent by the base station by the terminal are possibly different is solved, so that the terminal can be ensured to send correct channel state information to the base station, and the base station can perform subsequent scheduling and data transmission processes according to the correct channel state information.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a block diagram of a hardware structure of a computer terminal of a CSI processing method according to an embodiment of the present invention;

fig. 2 is a flowchart of a CSI processing method according to embodiment 1 of the present invention;

fig. 3 is a flowchart of a transmission method of a measurement pilot resource according to embodiment 1 of the present invention;

fig. 4 is a block diagram (one) of the structure of a CSI processing apparatus according to embodiment 2 of the present invention;

fig. 5 is a block diagram (ii) of the configuration of a CSI processing apparatus according to embodiment 2 of the present invention;

fig. 6 is a block diagram (one) of the structure of a transmission apparatus for measuring pilot resources according to embodiment 2 of the present invention;

fig. 7 is a block diagram (ii) of the structure of a transmission apparatus for measuring pilot resources according to embodiment 2 of the present invention;

fig. 8 is a block diagram of a terminal according to embodiment 2 of the present invention;

fig. 9 is a block diagram of a base station according to embodiment 2 of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

There is also provided, in accordance with an embodiment of the present invention, an embodiment of a method for processing CSI, where it is noted that the steps illustrated in the flowchart of the figure may be performed in a computer system, such as a set of computer-executable instructions, and that, although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different than here.

The method provided by the embodiment 1 of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking the example of the present invention running on a computer terminal, fig. 1 is a hardware block diagram of a computer terminal of an … … processing method according to an embodiment of the present invention. As shown in fig. 1, the computer terminal 10 may include one or more (only one shown) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data, and a transmission module 106 for communication functions. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration and is not intended to limit the structure of the electronic device. For example, the computer terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.

The memory 104 may be configured to store software programs and modules of application software, such as program instructions/modules corresponding to the page content processing method in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, implementing the vulnerability detection method of the application program. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the computer terminal 10. In one example, the transmission device 106 includes a Network adapter (NIC) that can be connected to other Network devices through a base station to communicate with the internet. In one example, the transmission device 106 can be a Radio Frequency (RF) module, which is used to communicate with the internet in a wireless manner.

Under the operating environment, the application provides a method for processing channel state information CSI as shown in fig. 2. Fig. 2 is a flowchart of a CSI processing method according to embodiment 1 of the present invention. As shown in fig. 2, the method of the present embodiment includes:

s202, a terminal receives a first measurement pilot frequency resource and obtains first CSI according to the first measurement pilot frequency resource;

s204, the terminal receives a second measurement pilot frequency resource and obtains a second CSI according to the second measurement pilot frequency resource and the first CSI.

Through the steps, the terminal can receive the first measurement pilot frequency resource and obtain the first CSI according to the first measurement pilot frequency resource; the technical scheme is adopted, and the problem that in the related art, the base station cannot perform accurate scheduling and data transmission according to the channel state information fed back by the terminal due to the fact that the two RI values obtained by independently measuring and calculating the received twice measurement pilot frequency resources sent by the base station by the terminal are possibly different is solved, so that the terminal can be ensured to send correct channel state information to the base station, and the base station can perform subsequent scheduling and data transmission processes according to the correct channel state information.

In a preferred implementation manner of the embodiment of the present invention, the first measurement pilot resource and the second measurement pilot resource belong to the same channel state informationProcess CSI Process. The first CSI includes at least one of: a first channel rank RI, a first channel state information reference pilot resource index CRI, a first channel quality indication CQI. The first CSI further includes: a first precoding matrix index, PMI, wherein the first PMI comprises at least one of: first codebook index i of first precoding matrix ₁ A first codebook first dimension index i of a first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ . The second CSI includes at least one of: a second RI, a second CQI, a second PMI, wherein the second PMI includes at least one of: first codebook index i of the second precoding matrix ₁ A second codebook index i of a second precoding matrix ₂ It should be noted that the first codebook index of the second precoding matrix may be i ₁ May also be indicated by other identifications. For example, i ₁ The present invention is not limited to the above embodiments.

It should be noted that the measurement pilot resource according to the embodiment of the present invention includes a CSI reference signal resource (CSI-RS resource) in the LTE standard.

In a preferred implementation manner of the embodiment of the present invention, obtaining the second CSI according to the second measurement pilot resource and the first CSI includes: and determining the value of the second RI according to the value of the first RI. Specifically, the method comprises at least one of the following steps:

the value of the second RI is equal to the value of the first RI;

The set of channel ranks comprises a set of at least one of: {1,2},{3,4},{5,6,7,8},{1,2,3,4},{5,6},{7,8}.

Obtaining second CSI according to the second measurement pilot resource and the first CSI, which may further include: obtaining a second CQI according to the second measurement pilot resource and the first CSI, wherein the first CSI comprises at least one of the following: a first RI, a first CRI.

In a preferred implementation manner of the embodiment of the present invention, the terminal feeds back the first CSI and the second CSI through a physical uplink channel, where the physical uplink channel includes at least one of: a physical uplink control channel PUCCH and a physical uplink shared channel PUSCH.

The terminal feeds back the first CSI and the second CSI through a physical uplink channel, and the method comprises the following steps:

the terminal feeds back the first CSI periodically through a PUCCH;

and the terminal feeds back the second CSI through the PUSCH.

Preferably, the terminal periodically feeds back different report information at different time instants through the PUCCH, wherein the report information includes at least one of: the first RI, the first PMI, the first CRI, the second RI, the second CQI and the second PMI.

Preferably, the report information including the first CSI and the report information including the second CSI have the same feedback parameter configuration, wherein the feedback parameter configuration includes at least one of: channel rank configuration index ri-ConfigIndex, and channel quality information precoding matrix index configuration index cqi-pmi-ConfigIndex.

Preferably, the feedback priority of the report information including the first CSI is higher than the feedback priority of the report information including the second CSI.

Some feedback modes of the report information are listed in the preferred embodiment of the invention, and comprise at least one of the following modes:

feedback mode a ₁ : periodically feeding back report information a ₁₁ And report information a ₁₂ WhereinThe report information a ₁₁ Including at least one of: a first RI, a first PMI; the report information a ₁₂ Including at least one of: a second PMI, a second CQI;

feedback mode a ₂ : periodically feeding back report information a ₂₁ Report information a ₂₂ And report information a ₂₃ Wherein the report information a ₂₁ The method comprises the following steps: first RI, the report information a ₂₂ The method comprises the following steps: a first PMI; the report information a ₂₃ Including at least one of: a second PMI, a second CQI;

feedback mode b ₅ : periodically feeding back report information b ₅₁ Report information b ₅₂ Report information b ₅₃ And report information b ₅₄ Wherein the report information b ₅₁ Including at least one of: a first CRI1 and a first RI; the report information b ₅₂ Includes a first PMI; the report information b ₅₃ Including at least one of: second RI, first codebook index i of second precoding matrix ₁ (ii) a The report information b ₅₄ Including at least one of: second codebook index i of second precoding matrix ₂ And a second CQI.

In order to better understand the technical solution of the embodiment of the present invention, the embodiment further provides a transmission method for measuring pilot resources, which is explained from the base station side. Fig. 3 is a flowchart of a transmission method of a measurement pilot resource according to embodiment 1 of the present invention. As shown in fig. 3, the transmission method includes:

s302, a base station sends a first measurement pilot frequency resource;

s304, the base station receives a first CSI fed back by the terminal according to the first measurement pilot frequency resource;

s306, the base station determines a parameter of a second measurement pilot according to the first CSI, and sends the second measurement pilot resource according to the determined parameter of the second measurement pilot, wherein the second measurement pilot resource is used for the terminal to obtain second CSI according to the second measurement pilot and the first CSI.

Through the steps, the base station determines parameters of a second measurement pilot frequency resource according to the first CSI fed back by the terminal, and the second measurement pilot frequency resource is used for the terminal to obtain a second CSI according to the second measurement pilot frequency and the first CSI.

Preferably, the first measurement pilot resource and the second measurement pilot resource belong to the same channel state information process.

Preferably, the first CSI includes at least one of: a first RI, a first measurement pilot resource index, CRI. The first CSI further includes: a first precoding matrix index, PMI, wherein the first PMI comprises at least one of: a first codebook index i1 of the first precoding matrix, a first codebook first dimension index i of the first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ 。

Preferably, the determining, by the base station, the parameter of the second measurement pilot resource according to the first CSI includes:

The method specifically comprises the following conditions:

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

Example 2

In this embodiment, a device for processing CSI is further provided, which is applied to a terminal, and is used to implement the method and the preferred embodiment at the terminal side in the foregoing embodiments, which have already been described and are not described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 4 is a block diagram (a) of a CSI processing apparatus according to embodiment 2 of the present invention. As shown in fig. 4, the CSI processing apparatus according to the embodiment of the present invention includes:

a first receiving module 40, configured to receive a first measurement pilot resource, and obtain first CSI channel state information according to the first measurement pilot resource;

a second receiving module 42, configured to receive a second measurement pilot resource and obtain second CSI according to the second measurement pilot resource and the first CSI.

By the device, the first receiving module receives the first measurement pilot frequency resource and obtains the first CSI channel state information according to the first measurement pilot frequency resource; the technical scheme solves the problem that in the related technology, the base station cannot perform accurate scheduling and data transmission according to the channel state information fed back by the terminal because the two obtained RI values are possibly different when the terminal performs independent measurement and calculation on the received twice measurement pilot frequency resources sent by the base station respectively, so that the terminal can be ensured to send correct channel state information to the base station, and the base station can perform subsequent scheduling and data transmission processes according to the correct channel state information.

Preferably, the first CSI includes at least one of: a first channel rank, RI, a first CSI reference pilot resource index, CRI, a first channel quality indication, CQI. The first CSI further includes: a first precoding matrix index, PMI, wherein the first PMI comprises at least one of: a first codebook index i1 of the first precoding matrix, a first codebook first dimension index i of the first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ . The second CSI includes at least one of: a second RI, a second CQI, a second PMI, wherein the second PMI includes at least one of: first codebook index i of the second precoding matrix ₁ A second codebook index i of a second precoding matrix ₂ 。

Fig. 5 is a block diagram showing the configuration of a CSI processing apparatus according to embodiment 2 of the present invention. As shown in fig. 5, the CSI processing apparatus according to the embodiment of the present invention further includes:

a first determining module 44, configured to determine a value of the second RI according to the value of the first RI.

Preferably, the value of the second RI is determined according to the value of the first RI, and includes at least one of:

the value of the second RI is equal to the value of the first RI;

preferably, the value of the second RI and the value of the first RI belong to the same channel rank set, and the channel rank set includes at least one positive integer. The set of channel ranks comprises a set of at least one of: {1,2},{3,4},{5,6,7,8},{1,2,3,4},{5,6},{7,8}.

In a preferred embodiment, the second receiving module 42 further includes an obtaining unit 420, configured to obtain a second CQI according to the second measurement pilot resource and the first CSI, where the first CSI includes at least one of: a first RI, a first CRI.

In a preferred embodiment, the apparatus further comprises a feedback module 46, the feedback module 46 comprising:

a first feedback unit 460, configured to periodically feed back the first CSI through a physical uplink control channel PUCCH;

a second feedback unit 462, configured to feedback the second CSI through a physical uplink shared channel PUSCH.

Preferably, the terminal periodically feeds back different report information at different time instants through the PUCCH, where the report information includes at least one of: the first RI, the first PMI, the first CRI, the second RI, the second CQI and the second PMI.

Preferably, the report information including the first CSI and the report information including the second CSI have the same feedback parameter configuration, wherein the feedback parameter configuration includes at least one of: channel rank configuration index ri-ConfigIndex, channel quality information precoding matrix index configuration index cqi-pmi-ConfigIndex.

feedback mode a ₅ : periodically feeding back report information a ₅₁ Report information a ₅₂ And report information a ₅₃ Wherein the report information a ₅₁ Including at least one of: a first RI, a first PMI; the report information a ₅₂ Including at least one of: second RI, first codebook index i of second precoding matrix ₁ (ii) a The report information a ₅₃ Including at least one of: second precoding matrix second codebook index i ₂ A second CQI;

feedback mode b ₄ : periodically feeding back report information b ₄₁ Report information b ₄₂ Report information b ₄₃ And report information b ₄₄ Wherein the report information b ₄₁ Including at least one of:a first CRI, a first RI; the report information b ₄₂ The method comprises the following steps: a first PMI; the report information b ₄₃ The method comprises the following steps: a second RI; the report information b ₄₄ Including at least one of: a second PMI, a second CQI;

feedback mode b ₅ : periodically feeding back report information b ₅₁ Report information b ₅₂ Report information b ₅₃ And report information b ₅₄ Wherein the report information b ₅₁ Including at least one of: a first CRI1 and a first RI; the report information b ₅₂ Includes a first PMI; the report information b ₅₃ Including at least one of: a second RI, a first codebook index i1 of a second precoding matrix; the report information b ₅₄ Including at least one of: second codebook index i2, second CQI of the second precoding matrix.

In order to better understand the technical solution of the embodiment of the present invention, the embodiment further provides a transmission device for measuring pilot resources, which is applied to a base station. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated. Fig. 6 is a block diagram (a) of a transmission apparatus for measuring pilot resources according to embodiment 2 of the present invention. As shown in fig. 6, the transmission apparatus includes:

a first sending module 60, configured to send a first measurement pilot resource;

a third receiving module 62, configured to receive the first CSI fed back by the terminal according to the first measurement pilot resource;

the second determination module 64: parameters for determining a second measurement pilot resource according to the first CSI;

a second sending module 66, configured to send the second measurement pilot resource according to the determined parameter of the second measurement pilot resource, where the second measurement pilot resource is used to instruct the terminal to obtain second CSI according to the second measurement pilot resource and the first CSI.

With the above arrangement, the first transmission module 60 transmits the first measurement pilot resource; a third receiving module 62 receives the first CSI fed back by the terminal according to the first measurement pilot resource; the second determining module 64 determines the parameters of the second measurement pilot resource according to the first CSI; the second sending module 66 sends the second measurement pilot frequency resource according to the determined parameter of the second measurement pilot frequency resource, and by the above technical scheme, the problem that in the related art, the two measurement pilot frequency resources sent by the base station and received by the terminal are independently measured and calculated respectively, and the obtained two RI values may be different, so that the base station cannot perform accurate scheduling and data transmission according to the channel state information fed back by the terminal is solved, and further, the terminal can be ensured to send correct channel state information to the base station, and the base station can perform subsequent scheduling and data transmission processes according to the correct channel state information.

Preferably, the first CSI includes at least one of: a first RI, a first CSI reference pilot resource index, CRI. The first CSI further includes: a first precoding matrix index, PMI, wherein the first PMI comprises at least one of: first codebook index i of first precoding matrix ₁ A first codebook first dimension index i of a first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ 。

Fig. 7 is a block diagram (ii) of a transmission apparatus for measuring pilot resources according to embodiment 2 of the present invention. As shown in fig. 7, the apparatus further includes a third determining module 68, configured to determine the number of ports of the second measurement pilot resource according to the value of the first RI. The method specifically comprises the following steps:

Preferably, the apparatus further includes a fourth determining module 610, configured to determine a precoding matrix of the second measurement pilot resource according to the first CSI, where the first CSI includes at least one of: a first PMI and a first CRI.

In order to better understand the technical solution of the embodiment of the present invention, the embodiment further provides a terminal, which is used for implementing the CSI processing method in the foregoing embodiment. Fig. 8 is a block diagram of a terminal according to embodiment 2 of the present invention. As shown in fig. 8, the terminal includes: a first processor 80; a first memory 82 for storing instructions executable by the first processor 80;

the first processor 80 is configured to perform the following operations according to instructions stored in the first memory 82:

receiving a first measurement pilot frequency resource, and acquiring first CSI according to the first measurement pilot frequency resource;

In order to better understand the technical solution of the embodiment of the present invention, the embodiment further provides a base station, which is used for implementing the transmission method for measuring the pilot resource in the foregoing embodiment. Fig. 9 is a block diagram of a base station according to embodiment 2 of the present invention. As shown in fig. 9, includes: a second processor 90; a second memory 92 for storing instructions executable by the second processor 90;

the second processor 90 is configured to perform the following operations according to the instructions stored in the second memory 92:

transmitting a first measurement pilot resource;

and determining parameters of a second measurement pilot according to the first CSI, and sending a second measurement pilot resource according to the determined parameters of the second measurement pilot, wherein the second measurement pilot resource is used for the terminal to obtain second CSI according to the second measurement pilot and the first CSI.

Example 3

In order to better understand the above technical solution, the following description is made with reference to the preferred embodiments. The measurement pilot resource related in the embodiment of the present invention includes a CSI reference signal resource (CSI-RS resource) in the LTE standard, and the following preferred embodiments all use the CSI-RS resource as an example for explanation.

Preferred embodiment 1

The embodiment of the invention provides a specific implementation mode of channel state information feedback and channel state information receiving.

The base station simultaneously configures a first CSI reference signal resource (CSI-RS resource1) and a second CSI reference signal resource (CSI-RS resource2) in the same channel state information process (CSI process), wherein the CSI-RS resource1 is a non-precoded CSI-RS, the CSI-RS resource2 is a precoded CSI-RS, only one set of CSI-RS resources is used, and the CSI-RS resource belongs to the condition of Class B, and K is 1. Assuming that the base station is configured with N1 TXRUs, the number of ports of the CSI-RS resource1 is N1, the number of ports of the CSI-RS2 is N2, generally, N2< N1, and preferably, N2< ═ 8. In addition, for one channel state information reference resource (CSI-RS resource), each set of CSI-RS resource includes the following information:

a CSI-RS port; CSI-RS time frequency resources; CSI-RS subframe configuration; the user assumed CSI feedback power; generating parameters of the CSI-RS sequence ID; a CDM type parameter.

The terminal and the base station realize the feedback and the reception of the channel state information through the following steps:

(1) the base station transmits the CSI-RS resource1 at time T1, transmits the CSI-RS resource2 at time T2,

here, the CSI-RS resource1 may be transmitted periodically or non-periodically. The CSI-RS resource2 may be transmitted periodically or aperiodically.

T1 is generally greater than T2. But may also be equal, where the time includes, but is not limited to, transmission interval/subframe/frame, symbol set, symbol group, that is, the base station transmits at the same time T, CSI-RS resource1 and CSI-RS resource2, which occupy different time-frequency resources.

(2) The user receives the CSI-RS resource1 at the time T3, calculates the first CSI according to the CSI-RS resource1, receives the CSI-RS resource2 at the time T4, and obtains the second CSI according to the first CSI and the CSI-RS resource 2.

Here T3 is greater than T1 and T4 is greater than T2. T4 is at least T3.

Here, the first CSI includes channel rank 1(RI1) and precoding matrix index 1.

Wherein, the value of RI1 is positive integer, preferably 1<＝RI1<8. The precoding matrix index 1 comprises a first precoding matrix index i ₁ Or the first precoding matrix first dimension index i ₁₁ And/or the second dimension index i of the first precoding matrix ₁₂ . I.e. when the antenna of the base station is a 1-dimensional antenna ₁ Such as the first codebook index i in the 8 antenna codebook in release 10 or the 4 antenna codebook in release 12 in LTE ₁ It means a long-term wideband channel information, i when the base station is equipped with 2-dimensional antennas ₁₁ And/or i ₁₂ For example, the first dimension index i of the first codebook in the 8,12,16 antenna codebook in release 13 in LTE a ₁₁ And/or the index i of the second dimension of the first codebook ₁₂ Which represents a long-term wideband channel information representing beam direction information in a first dimension and beam direction information in a second dimension, respectively.

When the second CSI is calculated, the value of the channel rank 1 may be directly used for the channel rank 2 of the second CSI. Since the channel rank 1 is calculated based on the non-precoded CSI-RS resource1, what is obtained by CSI-RS resource1 is a full-dimensional channel of all transmit antennas to all receive antennas, which is more comprehensive and reliable than the equivalent channel obtained by precoded CSI-RS resource 2. In addition, in the semi-static open MIMO technology, the second CSI may not include the precoding matrix index 2, so that the calculated channel quality indicator CQI2 is calculated according to the precoding matrix determined by the precoding matrix index 1 in the first CSI, and the rank of this precoding matrix is determined by RI1, so RI2 needs to be equal to RI1 at this time.

The terminal thus calculates a second channel from the value of channel rank 1 and channel H2 obtained by CSI-RS resource2Precoding matrix index 2 and/or channel quality indication CQI 2. Here, the precoding matrix index 2 includes a second precoding matrix index i ₂ And/or the first precoding matrix index i ₁ In the semi-static open MIMO technique, the second CSI does not include the second precoding matrix index 2.

(3) And the terminal feeds back the first CSI and the second CSI.

Here, the first CSI and the second CSI may be periodically fed back through a physical uplink control channel, PUCCH.

When the channel rank 2 is not fed back, the user feeds back the first CSI and the second CSI at 2-3 report types (report types).

It should be noted that the report information in the embodiment of the present invention includes a report Type, which is a concept in LTE, and may have other names in other standards, where a feedback unit including one or more channel state information contents (e.g., RI, CRI, i1, i2, CQI) is called report information.

The feedback type comprises the following modes:

mode a 1: the report type 1 is a channel rank 1 and a precoding matrix index 1; the report type 2 is precoding matrix index 2 and/or channel quality indication 2;

in the feedback mode, in a feedback period, a user feeds back content of a report type 1, namely channel rank 1 and precoding matrix index 1, at a first moment, and feeds back content of a report type 2, namely precoding matrix index 2 and/or channel quality indication 2 at a second moment.

Mode a 2: the report type 1 is a channel rank 1, and the report type 2 is a precoding matrix index 1; the report type 3 is precoding matrix index 2 and/or channel quality indication 2;

in this feedback mode, the user feeds back the content including report type 1 at the first time within one feedback period: channel rank 1, second time feedback report type 2 content: precoding matrix index 1, and the content of report type 3 is fed back at the third time: precoding matrix index 2 and/or channel quality indication 2.

Under the condition of feeding back the channel rank 2, the user feeds back the contents contained in different report types in sequence in the same period in one of the following modes. Wherein the report type includes one of the following modes:

mode a 3: the report type 1 is a channel rank 1 and a precoding matrix index 1; the report type 2 is a channel rank 2, and the report type 3 is a precoding matrix index 2 and/or a channel quality indicator 2;

mode a 4: the report type 1 is a channel rank 1, and the report type 2 is a precoding matrix index 1; the report type 3 is a channel rank 2, and the report type 4 is a precoding matrix index 2 and/or a channel quality indicator 2;

mode a 5: the report type 1 is a channel rank 1 and a precoding matrix index 1; report type 2 is i in channel rank 2 and precoding matrix index 2 ₁ Report type 4 is i in precoding matrix index 2 ₂ And/or channel quality indication 2;

mode a 6: the report type 1 is a channel rank 1, and the report type 2 is a precoding matrix index 1; report type 3 is i in channel rank 2 and precoding matrix index 2 ₁ Report type 4 is i in precoding matrix index 2 ₂ And/or channel quality indication 2;

or the user may also feed back the first CSI at time 1 and the second CSI at time 2 through a physical uplink shared channel PUSCH. Wherein the first CSI comprises a channel rank 1 and a precoding matrix index 1; the second CSI comprises channel quality indication 2 and/or channel rank 2, and/or precoding matrix index 2.

Or the user can feed back the first CSI through the PUCCH and feed back the second CSI through the PUSCH.

(4) The base station receives the first CSI and the second CSI. And the base station determines a parameter set of a second CSI reference signal resource according to the first CSI.

Here, the base station may transmit the first CSI reference signal resource and the second channel state reference signal resource. And then the step (1) is carried out until the whole transmission process is completed.

Here, the channel state information 1 includes a channel rank 1 and a precoding matrix index 1, wherein the precoding matrix index 1 includes a first precoding matrix index i1, or a first precoding matrix first dimension index i11 and/or a first precoding matrix second dimension index i 12.

Here, the determining, by the base station, the parameter set of the second CSI reference signal resource according to the first CSI refers to the number of ports of the second CSI reference signal resource determined by the base station according to the channel rank 1.

Preferably, when the channel rank 1 is 1, the number of ports of the second CSI reference signal resource is 2; when the channel rank 1 is greater than 1, the number of ports of the second CSI reference signal resource is an even number greater than 2.

Here, the base station finds the precoding vector set corresponding to the precoding matrix index according to the first precoding matrix index 1, which may be a set of vectors in a discrete fourier form. And precoding the second CSI reference signal resource by using the group precoding matrix set so as to obtain a precoded CSI-RS port.

It should be noted that, the CSI-RS resource1 and the CSI-RS resource2 in this embodiment may also be in two different CSI processes, and the implemented channel state information feedback and receiving process is the same as that of the CSI process of the CSI-RS resource1 and the CSI-RS resource 2.

In this embodiment and the following embodiments, the time may be a subframe, a frame, or other concepts in the wireless communication standard.

It should be noted that, the CSI-RS in this embodiment and the following embodiments may also have other terms in other standards, such as channel measurement pilot, and channel state information related pilot, which are only described as examples herein, but the present invention is not limited to be applied to all pilots for performing channel state information or channel measurement.

Preferred embodiment 2

The preferred embodiment provides a specific implementation of channel state information feedback and channel state information reception. The base station simultaneously configures a first CSI reference signal resource (CSI-RS resource1) and a second CSI reference signal resource (CSI-RS resource2) in the same channel state information process (CSI process), wherein the CSI-RS resource1 is a non-precoded CSI-RS, the CSI-RS resource2 is a precoded CSI-RS, only one set of CSI-RS resources is used, and the CSI-RS resource belongs to the condition of Class B, and K is 1. Assuming that the base station is configured with N1 TXRUs, the number of ports of the CSI-RS resource1 is N1, and the number of ports of the CSI-RS2 is N2, generally, N2< N1, and preferably, N2< ═ 8. In addition, for one channel state information reference resource (CSI-RS resource), each set of CSI-RS resource includes the same information as that of embodiment 1.

(1) the base station sends CSI-RS resource1 at time T1 and sends CSI-RS resource2 at time T2

Here, the CSI-RS resource1 may be transmitted periodically or may be transmitted non-periodically. The CSI-RS resource2 may be transmitted periodically or aperiodically.

T1 is generally greater than T2. But it may also be equal, that is, the base station sends CSI-RS resource1 and CSI-RS resource2 on the same transmission interval/subframe/frame, which occupy different time-frequency resources.

Here T3 is greater than T1 and T4 is greater than T2. T4 is at least T3.

Here, the first CSI includes channel rank 1(RI1) and precoding matrix index 1. Wherein the value range of the channel rank 1 and the meaning of the precoding matrix index 1 are the same as those of the embodiment 1, and are not described here.

When the second CSI is calculated, the value of the channel rank 1 needs to be considered for the channel rank 2 of the second CSI, and the value of the channel rank 2 is smaller than the value of the channel rank 1, so that the calculation complexity of a user can be reduced, for example, if the value of the channel rank 1 is 2, the value of the channel rank 2 is fixed to 1, and all possible values do not need to be traversed. This is also based on the fact that since the channel rank 1 is calculated based on the non-precoded CSI-RS resource1, what is obtained by the CSI-RS resource1 is a full dimensional channel from all transmit antennas to all receive antennas, which is more comprehensive and reliable than the equivalent channel obtained by the precoded CSI-RS resource 2. Let channel rank 2 be less than channel rank 1, with a smaller number of layers and thus also more robust. Since the minimum value of the channel rank is 1, the channel rank 2 is equal to or greater than 1 and equal to or less than 1.

The terminal thus calculates a second precoding matrix index 2 and/or a channel quality indication CQI2 from the value of channel rank 2 and the channel H2 obtained by CSI-RS resource 2. Here, the precoding matrix index 2 includes a second precoding matrix index i ₂ And/or the first precoding matrix index i ₁ 。

(3) And the terminal feeds back the first CSI and the second CSI.

Since the channel rank 2 and the channel rank 1 are not equal, the channel rank 2 needs to be fed back, and the user feeds back the contents included in different report types in sequence in the same period in one of the following manners. Wherein the report type includes one of the following modes:

mode a 5: the report type 1 is a channel rank 1 and a precoding matrix index 1; the report type 2 is channel rank 2 and i1 in precoding matrix index 2, and the report type 4 is i2 in precoding matrix index 2 and/or channel quality indication 2;

or the user may also feed back the first CSI at time 1 and the second CSI at time 2 through a physical uplink shared channel PUSCH. Wherein the first CSI comprises a channel rank 1 and a precoding matrix index 1; the second CSI includes precoding matrix index 2 and channel quality indication 2, channel rank 2.

Here, the channel state information 1 includes a channel rank 1 and a precoding matrix index 1, wherein the precoding matrix index 1 includes a first precoding matrix index i ₁ Or the first precoding matrix first dimension index i ₁₁ And/or the second dimension index i of the first precoding matrix ₁₂ 。

Here, the determining, by the base station, the parameter set of the second CSI reference signal resource according to the first CSI refers to the number of ports of the second CSI reference signal resource determined by the base station according to the channel rank 1. Preferably, when the channel rank 1 is 1, the number of ports of the second CSI reference signal resource is 2; when the channel rank 1 is greater than 1, the number of ports of the second CSI reference signal resource is an even number greater than 2.

Here, the base station finds the precoding vector set corresponding to the precoding matrix index according to the first precoding matrix index 1, which may be a set of vectors in a discrete fourier form. And precoding the second CSI reference signal resource by using the group precoding matrix combination so as to obtain a precoded CSI-RS port.

It should be noted that the CSI-RS resource1 and the CSI-RS resource2 in this embodiment may also be in two different CSI processes, and the implemented channel state information feedback and receiving process is the same as that of the CSI process of the CSI-RS resource1 and the CSI-RS resource 2.

It should be noted that, in this embodiment, in step (2), when calculating the channel rank 2 of the second CSI, a value of the channel rank 1 needs to be considered, and the value of the channel rank 2 and the value of the channel rank 1 are from the same set of channel ranks. Wherein the set of channel ranks comprises a set of finite positive integers. For example, if the value of channel rank 1 belongs to the set S, the value of channel rank 2 is selected only in the set S, and a specific example is to select the minimum element or the maximum element in the set S. Preferably, the set of channel ranks S includes but is not limited to {1,2}, {3,4}, {5,6,7,8}, {1,2,3,4 }. Doing so may also reduce the computational complexity of the user. That is, the channel rank is divided into 3 sets C1 ═ {1,2}, C2 ═ 3,4}, C3 ═ {5,6,7,8}, or two sets C1 ═ 1,2}, C2 ═ 3,4}, or C1 ═ 1,2,3,4}, and C2 ═ {5,6,7,8}, where S is one of C1 to C3.

Preferred embodiment 3

The preferred embodiment of the invention provides a specific implementation mode of channel state information feedback and channel state information receiving. The base station simultaneously configures a first CSI reference signal resource (CSI-RS resource1) and a second CSI reference signal resource (CSI-RS resource2) in the same channel state information process (CSI process), where CSI-RS resource1 is a precoded CSI-RS, and includes K CSI-RS resources, each CSI-RS resource includes Nk ports, where Nk is generally less than or equal to 8, where K is 1, …, and K. The base station can select K precodes in a polling mode or a fixed precoding set, precode the K CSI-RS resources respectively and send the precoded K CSI-RS resources to the terminals, wherein each CSI-RS resource corresponds to a channel state information reference pilot frequency resource index CRI, each terminal needs to calculate all the K CSI-RS resources and feed back the index CRI of the CSI-RS resource with the best channel quality to the base station, and the base station knows the corresponding precoding matrix or precoding matrix set after obtaining the CRI fed back by the user. And CSI-RS resource2 is a precoded CSI-RS, and uses only one set of CSI-RS resources, and belongs to Class B, where K is 1. Assuming that the base station is configured with N0 TXRUs, the number of ports of CSI-RS2 is N2, generally N2< N0, and preferably N2< ═ 8. In addition, for one channel state information reference resource (CSI-RS resource), each set of CSI-RS resource includes the following information:

a CSI-RS port; CSI-RS time frequency resources; CSI-RS subframe configuration; the user assumed CSI feedback power; generating parameters of the CSI-RS sequence ID; a CDM type parameter; the terminal and the base station realize the feedback and the reception of the channel state information through the following steps:

(1) the base station transmits the CSI-RS resource1 at the time T1 or in a time period starting at the time T1, and transmits the CSI-RS resource2 at the time T2

Here, the CSI-RS resource1 may be transmitted periodically or aperiodically. The CSI-RS resource2 may be transmitted periodically or aperiodically.

The K sets of CSI-RS resources 1 may be sent at the same time, occupy different time-frequency resources, or be sent at different times, and at this time, need to be sent at multiple times within a time period starting from T1.

T1 is generally greater than T2. But it may also be equal, that is, the base station sends the CSI-RS resource1 and the CSI-RS resource2 on the same transmission interval/subframe/frame, which occupy different time-frequency resources.

Here T3 is greater than T1 and T4 is greater than T2. T4 is at least T3.

Here, the first CSI includes a channel rank 1(RI1) and a precoding matrix index 1 and/or a first channel state reference pilot resource index CRI 1.

Wherein, the value of RI1 is positive integer, preferably 1<＝RI1<8. The precoding matrix index 1 comprises a first precoding matrix index i ₁ Or the first precoding matrix first dimension index i11 and/or the first precoding matrix second dimension index i ₁₂ . I.e. when the antenna of the base station is a 1-dimensional antenna ₁ Such as the first codebook index i in the 8 antenna codebook in release 10 or the 4 antenna codebook in release 12 in LTE ₁ It means a long-term wideband channel information, i when the base station is equipped with 2-dimensional antennas ₁₁ And/or i ₁₂ For example, the first codebook first dimension index i in the 8,12,16 antenna codebook in release 13 in LTE a ₁₁ And/or the index i of the second dimension of the first codebook ₁₂ Which represents a long-term wideband channel information representing beam direction information in a first dimension and beam direction information in a second dimension, respectively.

When the second CSI is calculated, the value of the channel rank 1 may be directly used for the channel rank 2 of the second CSI. Since the channel rank 1 is calculated based on the non-precoded CSI-RS resource1, what is obtained by CSI-RS resource1 is a full-dimensional channel of all transmit antennas to all receive antennas, which is more comprehensive and reliable than the equivalent channel obtained by precoded CSI-RS resource 2. In semi-static open MIMO, the precoding matrix index 2 of the second CSI is not fed back, and in this case, the CQI2 is calculated from the precoding matrix identified by the precoding matrix index 1, and in this case, the RI2 should be RI 1.

The terminal thus calculates a second precoding matrix index 2 and/or a channel quality indication CQI2 from the value of channel rank 1 and the channel H2 obtained by CSI-RS resource 2. Here, the precoding matrix index 2 includes a second precoding matrix index i ₂ And/or the first precoding matrix index i ₁ 。

It should be noted that, here, the value of the channel rank 2 may also be limited according to the value of the channel rank 1, for example, the value of the channel rank 2 is smaller than the value of the channel 1. Or the value of channel rank 1 and the value of channel rank 2 are from the same set S, where the set S is a set of positive integers including but not limited to {1,2}, {3,4}, {5,6,7 }.

(3) And the terminal feeds back the first CSI and the second CSI.

When the channel rank 2 is not fed back, the user feeds back the first CSI and the second CSI in 2-3 report types (report types). The feedback type comprises the following modes:

mode b 1: report type 1 is CRI1, report type 2 is channel rank 1 and precoding matrix index 1; the report type 3 is precoding matrix index 2 and/or channel quality indication 2;

in this feedback mode, a user feeds back content CRI1 including type 1 at a first time, feeds back content channel rank 1 and precoding matrix index 1 including type 2 at a second time, and feeds back content precoding matrix index 2 and/or channel quality indication 2 reporting type 3 at a third time in a feedback period.

Mode b 2: report type 1 is CRI1, report type 2 is channel rank 1, and report type 3 is precoding matrix index 1; the report type 4 is precoding matrix index 2 and/or channel quality indication 2;

in this feedback mode, a user feeds back content CRI1 including type 1 at a first time, content channel rank 1 including type 2 at a second time, content precoding matrix index 1 including type 3 at the second time, and content precoding matrix index 2 and/or channel quality indication 2 reporting type 4 at a fourth time in a feedback period.

Mode b 3: report type 1 is CRI1 and channel rank 1, and report type 2 is precoding matrix index 1; the report type 3 is precoding matrix index 2 and/or channel quality indication 2;

in the case of feeding back the channel rank 2, the user feeds back the contents included in different report types in sequence in the same period in one of the following manners. Wherein the report type includes one of the following modes:

mode b 4: report type 1 is CRI1 and channel rank 1, and report type 2 is precoding matrix index 1; the report type 3 is a channel rank 2, and the report type 4 is a precoding matrix index 2 and/or a channel quality indicator 2;

mode b 5: report type 1 is CRI1 and channel rank 1, and report type 2 is precoding matrix index 1; report type 3 is i1 in channel rank 2 and precoding matrix index 2, and report type 4 is i2 and/or channel quality indication 2 in precoding matrix index 2;

or the user may also feed back the first CSI at time 1 and the second CSI at time 2 through a physical uplink shared channel PUSCH. Wherein the first CSI comprises CRI1, channel rank 1 and precoding matrix index 1; the second CSI comprises precoding matrix index 2 and channel quality indication 2 and/or channel rank 2.

It should be noted that the CSI-RS resource1 and the CSI-RS resource2 in the embodiment of the present invention may also be located in two different CSI processes, and the implemented channel state information feedback and receiving process is the same as that of the CSI-RS resource1 and the CSI-RS resource2 which belong to the same CSI process.

In summary, the embodiments of the present invention achieve the following technical effects: the problem that in the related technology, the two received CSI-RS resources sent by the base station by the terminal are independently measured and calculated respectively, and the two obtained RI values are possibly different, so that the base station cannot perform accurate scheduling and data transmission according to the CSI fed back by the terminal is solved, the terminal can be ensured to send correct channel state information to the base station, and the base station can perform subsequent scheduling and data transmission processes according to the correct channel state information.

The embodiment of the invention also provides a storage medium. Optionally, in this embodiment, the storage medium may be configured to store a program code executed by the processing method of the page content provided in the first embodiment.

Optionally, in this embodiment, the storage medium may be located in any one of computer terminals in a computer terminal group in a computer network, or in any one of mobile terminals in a mobile terminal group.

Optionally, in this embodiment, the storage medium is configured to store program code for performing the following steps:

s1, receiving a first measurement pilot frequency resource, and obtaining a first CSI according to the first measurement pilot frequency resource;

s2, receiving a second measurement pilot resource, and obtaining a second CSI according to the second measurement pilot resource and the first CSI.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s1, sending a first measurement pilot frequency resource;

s2, receiving a first CSI fed back by the terminal according to the first measurement pilot resource;

s3, determining parameters of a second measurement pilot according to the first CSI, and sending the second measurement pilot resource according to the determined parameters of the second measurement pilot, wherein the second measurement pilot resource is used for the terminal to obtain second CSI according to the second measurement pilot and the first CSI.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for processing Channel State Information (CSI) is characterized by comprising the following steps:

a terminal receives a first measurement pilot frequency resource and obtains first Channel State Information (CSI) according to the first measurement pilot frequency resource;

the terminal receives a second measurement pilot frequency resource and obtains second CSI according to the second measurement pilot frequency resource and the first CSI;

wherein the first measurement pilot resource is a non-precoded measurement pilot resource; the second measurement pilot resource is a pre-coded measurement pilot resource.

2. The method of claim 1, wherein the first measurement pilot resource and the second measurement pilot resource belong to a same channel state information process.

3. The method of claim 1, wherein the first CSI comprises at least one of: a first channel rank, RI, a first measurement pilot resource index, CRI, a first channel quality indication, CQI.

4. The method of claim 3, wherein the first CSI further comprises: a first precoding matrix index, PMI, wherein the first PMI comprises at least one of: first codebook index i of first precoding matrix ₁ A first codebook first dimension index i of a first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ 。

5. The method of claim 3, wherein the second channel state information comprises at least one of: a second RI, a second CQI, a second PMI, wherein the second PMI includes at least one of: first codebook index i of the second precoding matrix ₁ A second codebook index i of a second precoding matrix ₂ 。

6. The method of claim 5, wherein obtaining second CSI from the second measurement pilot resource and the first CSI comprises:

7. The method of claim 6, wherein a value of the second RI is determined according to a value of the first RI, and comprises at least one of:

the value of the second RI is equal to the value of the first RI;

and the value of the second RI and the value of the first RI belong to the same channel rank set, and the channel rank set comprises at least one positive integer.

8. The method of claim 7, wherein the set of channel ranks comprises a set of at least one of: {1,2 }; {3,4 }; {5,6,7,8 }; {1,2,3,4 }; {5,6 }; {7,8}.

9. The method of claim 1, wherein obtaining second CSI based on the second measurement pilot resource and the first CSI comprises:

10. The method of claim 1, wherein a terminal feeds back the first CSI and the second CSI through a physical uplink channel, wherein the physical uplink channel comprises at least one of: a physical uplink control channel PUCCH and a physical uplink shared channel PUSCH.

11. The method of claim 10, wherein the terminal feeds back the first CSI and the second CSI via a physical uplink channel, comprising:

the terminal feeds back first CSI at a first time and second CSI at a second time through a PUSCH, wherein the second CSI comprises at least one of the following: a second CQI, a second RI, and a second PMI.

12. The method of claim 10, wherein a terminal feeds back the first CSI and the second CSI via a physical uplink channel, and comprises:

the terminal feeds back the first CSI periodically through a PUCCH;

and the terminal feeds back the second CSI through the PUSCH.

13. The method of claim 11, wherein a terminal periodically feeds back different report information at different time instances through a PUCCH, wherein the report information comprises at least one of: the first RI, the first PMI, the first CRI, the second RI, the second CQI and the second PMI.

14. The method of claim 13, wherein the reporting information including the first CSI and the reporting information including the second CSI have a same feedback parameter configuration, wherein the feedback parameter configuration comprises at least one of: channel rank configuration index ri-ConfigIndex, channel quality information precoding matrix index configuration index cqi-pmi-ConfigIndex.

15. The method of claim 13, wherein a feedback priority of reporting information including the first CSI is higher than a feedback priority of reporting information including the second CSI.

16. The method of claim 13, wherein the feedback manner of the report information comprises at least one of:

17. A transmission method for measuring pilot resources, comprising:

a base station sends a first measurement pilot frequency resource;

the base station determines parameters of a second measurement pilot according to the first CSI and sends a second measurement pilot resource according to the determined parameters of the second measurement pilot, wherein the second measurement pilot resource is used for the terminal to obtain second CSI according to the second measurement pilot and the first CSI;

18. The method of claim 17, wherein the first measurement pilot resource and the second measurement pilot resource belong to a same channel state information process.

19. The method of claim 17, wherein the first CSI comprises at least one of: a first RI, a first measurement pilot resource index, CRI.

20. The method of claim 17, wherein the first CSI further comprises: a first precoding matrix index, PMI, wherein the first PMI comprises at least one of: first codebook index i of first precoding matrix ₁ A first codebook first dimension index i of a first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ 。

21. The method of claim 19, wherein the base station determines the parameters of the second measurement pilot resource according to the first CSI comprises:

22. The method of claim 21, wherein the base station determines the number of ports of the second measurement pilot resource according to the value of the first RI, and comprises:

23. The method of claim 17, wherein the base station determines the parameters of the second measurement pilot resource according to the first CSI comprises:

24. A device for processing channel state information, applied to a terminal, is characterized by comprising:

the first receiving module is used for receiving a first measurement pilot frequency resource and obtaining first Channel State Information (CSI) according to the first measurement pilot frequency resource;

a second receiving module, configured to receive a second measurement pilot resource and obtain second CSI according to the second measurement pilot resource and the first CSI;

25. The apparatus of claim 24, wherein the first measurement pilot resource and the second measurement pilot resource belong to a same channel state information process.

26. The apparatus of claim 24, wherein the first CSI comprises at least one of: a first channel rank RI, a first measurement pilot resource index CRI, a first channel quality indication CQI.

27. The apparatus of claim 26, wherein the first CSI further comprises: a first precoding matrix index, PMI, wherein the first PMI comprises at least one of: first codebook index i of first precoding matrix ₁ A first codebook first dimension index i of a first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ 。

28. The apparatus of claim 26, wherein the second CSI comprises at least one of: a second RI, a second CQI, a second PMI, wherein the second PMI includes at least one of: first codebook index i of the second precoding matrix ₁ A second codebook index i of a second precoding matrix ₂ 。

29. The apparatus of claim 28, further comprising:

and the first determining module is used for determining the value of the second RI according to the value of the first RI.

30. The apparatus of claim 29, wherein a value of the second RI is determined according to a value of the first RI, and wherein the value comprises at least one of:

the value of the second RI is equal to the value of the first RI;

31. The apparatus of claim 30, wherein the set of channel ranks comprises a set of at least one of: {1,2 }; {3,4 }; {5,6,7,8 }; {1,2,3,4 }; {5,6 }; {7,8}.

32. The apparatus of claim 24, wherein the second receiving module further comprises an obtaining unit configured to obtain a second CQI from the second measurement pilot resource and the first CSI, wherein the first CSI comprises at least one of: a first RI, a first CRI.

33. The apparatus of claim 24, further comprising a feedback module, the feedback module comprising:

34. A transmission apparatus for measuring pilot resources, applied to a base station, includes:

a first sending module, configured to send a first measurement pilot resource;

a second sending module, configured to send the second measurement pilot resource according to the determined parameter of the second measurement pilot resource, where the second measurement pilot resource is used to instruct the terminal to obtain second CSI according to the second measurement pilot resource and the first CSI;

35. The apparatus of claim 34, wherein the first measurement pilot resource and the second measurement pilot resource belong to a same channel state information process.

36. The apparatus of claim 34, wherein the first CSI comprises at least one of: a first RI, a first CSI reference pilot resource index, CRI.

37. The apparatus of claim 36, wherein the first CSI further comprises: a first precoding matrix index, PMI, wherein the first PMI comprises at least one of: first codebook index i of first precoding matrix ₁ A first codebook first dimension index i of a first precoding matrix ₁₁ A second dimension index i of a first codebook of a first precoding matrix ₁₂ 。

38. The apparatus of claim 36, further comprising a third determining module configured to determine the number of ports of the second measurement pilot resource according to the value of the first RI.

39. The apparatus of claim 38, wherein the base station determines the number of ports of the second measurement pilot resource according to the value of the first RI, and comprises:

40. The apparatus of claim 34, wherein the apparatus further comprises a fourth determining module configured to determine a precoding matrix for the second measurement pilot resource based on the first CSI, wherein the first CSI comprises at least one of: a first PMI and a first CRI.

41. A terminal, comprising:

a first processor;

a first memory for storing instructions executable by the first processor;

receiving a first measurement pilot frequency resource, and obtaining first Channel State Information (CSI) according to the first measurement pilot frequency resource;

the first measurement pilot frequency resource is a non-pre-coded measurement pilot frequency resource; the second measurement pilot resource is a pre-coded measurement pilot resource.

42. A base station, comprising:

a second processor;

a second memory for storing instructions executable by the second processor;

transmitting a first measurement pilot resource;

receiving first Channel State Information (CSI) fed back by the terminal according to the first measurement pilot frequency resource;

determining a parameter of a second measurement pilot according to the first CSI, and sending a second measurement pilot resource according to the determined parameter of the second measurement pilot, wherein the second measurement pilot resource is used for the terminal to obtain second CSI according to the second measurement pilot and the first CSI;