WO2016161871A1

WO2016161871A1 - Method, user terminal, base station, and system for reporting channel state information

Info

Publication number: WO2016161871A1
Application number: PCT/CN2016/076176
Authority: WO
Inventors: 张雯; 夏树强; 戴博; 石靖; 陈宪明; 刘锟; 方惠英
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-04-10
Filing date: 2016-03-11
Publication date: 2016-10-13
Also published as: CN106160932A

Abstract

Provided in the present invention are a method, user terminal, base station, and system for reporting channel state information. The method comprises: acquiring channel state information (CSI); and, reporting the acquired CSI to a base station, where the CSI reported comprises at least one among the following information: a first repetition count; at least one channel quality indicator (CQI), where the at least one CQI is a CQI corresponding to a second repetition count; a third repetition count and at least one CQI corresponding to the third repetition count; and, a fourth repetition count and at least two CQIs respectively corresponding to the fourth repetition count.

Description

Method for reporting channel state information, user terminal, base station and system

Technical field

The present invention relates to a network management technology for an MTC user terminal in the communication field, and in particular, to a method for reporting channel state information, a user terminal, a base station, and a system.

Background technique

Machine Type Communication (MTC) User Equipment (UE), also known as Machine to Machine (M2M) user communication equipment, is the main application form of the Internet of Things. In recent years, due to the high spectrum efficiency of Long-Term Evolution (LTE)/Long-Term Evolution Advance (LTE-Advance/LTE-A), more and more mobile operators choose LTE/ LTE-A is the evolution direction of broadband wireless communication systems. MTC user terminals are usually low-cost devices with features such as relatively small RF bandwidth support and single receive antenna. The transmit and receive bandwidth is typically 1.4 MHz. There is a type of MTC user terminal, such as an electric meter, which may be placed in a metal cabinet in the basement with very poor coverage.

Summary of the invention

In order to solve the technical problems in the prior art, the embodiments of the present invention provide a method for reporting channel state information, a user terminal, a base station, and a system, which can solve at least the above problems in the prior art.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The embodiment of the invention provides a method for reporting channel state information, which is applied to a user terminal, and the method includes:

Obtaining channel state information CSI;

Reporting the obtained CSI to the base station;

The CSI reported includes at least one of the following information:

First number of repetitions;

At least one channel quality indication information CQI, the at least one CQI is a CQI corresponding to the second repetition number;

a third repetition number, and at least one CQI corresponding to the third repetition number;

The fourth repetition number, and the fourth repetition number respectively correspond to at least two CQIs.

In the foregoing solution, the obtaining the CSI includes:

Determining the location of the channel state information CSI reference resource;

The CSI is obtained based on the location of the CSI reference resource.

In the above solution, the first repetition number includes:

The modulation and coding strategy MCS corresponding to the first repetition number;

or,

The signal corresponding to the first repetition number is compared with the interference plus noise ratio.

In the above solution, the at least one CQI is the second repetition number of the CQI corresponding to the second repetition number being a preset value or a value notified by the base station.

The second repetition number is: the same number of subframes as the CSI reference resource in the time domain;

or,

The number of subframes corresponding to a narrow band of the CSI reference resource in the frequency domain is the same.

In the above solution, the method further includes:

Presetting information to be included in the reported CSI; or acquiring information to be included in the reported CSI from the base station.

In the above solution, the reported CSI further includes the following information: at least one narrowband index.

In the above solution, the at least one CQI is:

An average CQI on the CSI reference resource; or a CQI corresponding to each narrowband of the plurality of narrowbands, where the plurality of narrowbands are a plurality of narrowbands corresponding to the CSI reference resources in the frequency domain.

In the above solution, the first repetition number is one of the following:

The first repetition number is an average repetition number on the CSI reference resource;

or,

The first repetition number includes a repetition number corresponding to each narrowband of the plurality of narrowbands, and the plurality of narrowbands are a plurality of narrowbands corresponding to the CSI reference resources in a frequency domain.

In the above solution, the method further includes: receiving CSI request information sent by the base station.

In the above solution, the receiving CSI request information sent by the base station includes:

Receiving CSI request information sent by the base station through the specified information;

The specified information includes at least one of the following: downlink control information, random access response information RAR, PDSCH scheduled by the downlink control information, or downlink control information and a PDSCH scheduled by the downlink control information.

In the above solution, the determining the location of the CSI reference resource includes at least one of the following:

The CSI reference resource is all narrowbands that receive the specified information in the frequency domain, and all or part of the subframes that receive the specified information in the time domain; or

The CSI reference resource is a partial narrowband that receives the specified information in the frequency domain, and all or part of the subframes that receive the specified information in the time domain; or

The CSI reference resource is, in the frequency domain, one or more narrowbands of all narrowbands that have received downlink information before the CSI is reported, and all or part of the subframes corresponding to the one or more narrowbands in the time domain; or ,

Determining the CSI reference resource according to a preset manner; or

The location of the CSI reference resource notified by the base station.

The embodiment of the present invention provides a method for reporting channel state information, which is applied to a base station, and the method includes:

Obtaining the CSI reported to the user terminal;

Scheduling the user terminal according to the reported CSI;

The CSI reported by the user terminal includes at least one of the following information:

First number of repetitions;

In the above solution, the method further includes:

Sending CSI request information to the user terminal.

In the above solution, the sending CSI request information to the user terminal includes:

Sending CSI request information to the user terminal by specifying information;

In the foregoing solution, the downlink control information or the RAR includes at least one of the following information:

Reporting a preset information format corresponding to the CSI;

The specified number of repetitions;

MCS or SINR;

The location of the CSI reference resource.

An embodiment of the present invention provides a user terminal, where the user terminal includes:

a first processing unit, configured to acquire CSI;

a first communication unit, configured to report the acquired CSI to the base station;

The CSI reported in the report includes at least one of the following information:

First number of repetitions;

In the foregoing solution, the first processing unit is further configured to determine a location of the channel state information CSI reference resource, and acquire the CSI based on the location of the CSI reference resource.

In the above solution, the first repetition number includes:

or,

In the above solution, the second repetition number is: the same number of subframes as the CSI reference resource in the time domain;

or,

In the above solution, the first processing unit is further configured to preset information to be included in the reported CSI;

or,

The information to be included in the reported CSI is acquired from the base station by the first communication unit.

In the above solution, the at least one CQI is:

An average CQI on the CSI reference resource; or each narrow band pair of the plurality of narrow bands In the CQI, the plurality of narrowbands are a plurality of narrowbands corresponding to the CSI reference resources in the frequency domain.

In the above solution, the first repetition number is one of the following:

The first number of repetitions is an average number of repetitions on the CSI reference resource, or

In the above solution, the communication unit is further configured to receive CSI request information sent by the base station.

In the foregoing solution, the first communications unit is further configured to receive CSI request information sent by the base station by using the specified information;

In the above solution, the first processing unit determines a location of the CSI reference resource, including at least one of the following:

Determining the CSI reference resource according to a preset manner; or

The location of the CSI reference resource notified by the base station.

An embodiment of the present invention provides a base station, where the base station includes:

a second communication unit, configured to acquire CSI reported to the user terminal;

a second processing unit, configured to schedule the user terminal according to the reported CSI;

First number of repetitions;

In the above solution, the second communication unit is further configured to send CSI request information to the user terminal.

In the above solution, the second communication unit is specifically configured to send CSI request information to the user terminal by using specified information;

Reporting a preset information format corresponding to the CSI;

The specified number of repetitions;

MCS or SINR;

The location of the CSI reference resource.

The embodiment of the invention further provides a system for reporting channel state information, the system comprising:

The user terminal is configured to obtain the channel state information CSI, and report the obtained CSI to the base station;

The base station is configured to receive the CSI reported by the user terminal, and schedule the user terminal according to the reported CSI;

First number of repetitions;

The embodiment of the present invention further provides a computer readable storage medium, configured to perform acquisition of channel state information CSI;

Reporting the obtained CSI to the base station;

The CSI reported includes at least one of the following information:

First number of repetitions;

The method for the channel state information reporting, the user terminal, the base station, and the system provided by the present invention, after determining the location of the CSI reference resource, the user terminal can obtain the CSI based on the location, and report the CSI to the base station according to the preset information format. Since the CSI can be obtained by the first repetition number, the CQI in the reported information can be effectively used by the base station, thereby ensuring that the user terminal at the low coverage position is effectively scheduled by the base station.

DRAWINGS

1 is a schematic flowchart 1 of a method for reporting channel state information according to an embodiment of the present invention;

2 is a second schematic flowchart of a method for reporting channel state information according to an embodiment of the present invention;

3 is a schematic flowchart 3 of a method for reporting channel state information according to an embodiment of the present invention;

4 is a schematic structural diagram of a user terminal according to an embodiment of the present invention;

5 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a system for reporting channel state information according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Embodiment 1

The embodiment of the present invention provides a method for reporting channel state information, which is applied to a user terminal, as shown in FIG. 1 , and includes:

Step 101: Acquire channel state information (CSI).

Step 102: Report the obtained CSI to the base station.

The CSI reported includes at least one of the following information:

First number of repetitions;

Here, the user terminal may be an MTC user terminal.

The first repetition number includes: a modulation and coding strategy (MCS) corresponding to the first repetition number; or a signal to interference plus noise ratio (SINR) corresponding to the first repetition number. The MCS and the SINE may be preset in the user terminal or notified by the eNB.

The acquiring the CSI includes: determining a location of the channel state information CSI reference resource; and acquiring the CSI based on the location of the CSI reference resource.

The first number of repetitions is a preset value or a value notified by the eNB.

The first number of repetitions is: the number of subframes of the CSI reference resource in the time domain, or the number of subframes corresponding to a narrowband of the CSI reference resource in the frequency domain.

The method further includes: presetting information to be included in the reported CSI; or Acquiring information to be included in the reported CSI from the base station.

The at least one CQI is: an average CQI on the CSI reference resource; or a CQI corresponding to each narrowband of the plurality of narrowbands, where the plurality of narrowbands are multiple corresponding to the CSI reference resources in the frequency domain. Narrow band.

The first number of repetitions is one of the following:

When the first repetition number is one time, the first repetition number is an average repetition number on the CSI reference resource; or

When the first repetition number is two or more times, the first repetition number includes a repetition number corresponding to each narrowband of the plurality of narrowbands, and the plurality of narrowbands are the CSI reference resources in the frequency domain. A corresponding plurality of narrow bands.

In the embodiment, the at least one CQI is a CQI corresponding to the second repetition number, and each of the at least one CQI is a value accumulated by the CQI acquired according to the second repetition number.

The method further includes receiving CSI request information sent by the base station.

The receiving, by the UE, the CSI request information sent by the base station includes:

Determining a location of the CSI reference resource, including at least one of the following:

The CSI reference resource is in the frequency domain before the UE reports the CSI, and the UE receives the downlink. One or more narrowbands of all narrowbands of information, all or part of subframes corresponding to the UE in the one or more narrowbands in the time domain; or

Determining, by the UE, the CSI reference resource according to a preset manner; or

The location of the CSI reference resource notified by the base station.

It can be seen that, by adopting the foregoing solution, after determining the location of the CSI reference resource, the user terminal can obtain the CSI based on the location, and report the CSI to the base station according to the preset information format; The CSI ensures that the CQI in the reported information can be effectively used by the base station, thereby ensuring that the user terminal at the location of low coverage is effectively scheduled by the base station.

Embodiment 2

The embodiment of the present invention provides a method for reporting channel state information, which is applied to a base station. As shown in FIG. 2, the method includes:

Step 201: Acquire a CSI reported by the user terminal.

Step 202: Perform scheduling on the user terminal according to the reported CSI.

First number of repetitions;

Here, the user terminal may be an MTC user terminal.

In addition, the base station may further notify the location of the CSI reference resource corresponding to the user terminal, so that the user terminal receives the CSI reference resource at the corresponding location according to the notification of the base station.

The first repetition number includes: a modulation and coding strategy MCS corresponding to the first repetition number; or a signal to interference plus noise ratio corresponding to the first repetition number. The MCS and the SINE may be preset in the user terminal or notified by the eNB.

The method also includes transmitting CSI request information to the user terminal.

The sending the CSI request information to the user terminal includes:

Sending CSI request information to the user terminal by specifying information;

The preset information format corresponding to the CSI is reported; the specified number of repetitions; MCS or SINR; the location of the CSI reference resource.

The first number of repetitions is one of the following:

The number of repetitions is an average number of repetitions on the CSI reference resource, or

The two or more repetition times include a repetition number corresponding to each of the plurality of narrow bands, and the plurality of narrow bands are a plurality of narrow bands corresponding to the CSI reference resources in a frequency domain.

The CSI reference resource is one or more narrowbands in all narrowbands of the downlink information received by the UE before the CSI is reported in the frequency domain, and all or part of the UE corresponding to the one or more narrowbands in the time domain. Subframe; or,

The location of the CSI reference resource notified by the eNB.

Embodiment 3

An embodiment of the present invention provides a method for reporting channel state information, as shown in FIG. 3, including:

Step 301: The evolved base station (eNB) sends CSI request information to the UE, and triggers the UE to send CSI by using the CSI request information.

Step 302: The UE receives the CSI request information, and determines a location of the CSI reference resource according to the preset information format.

Step 303: Acquire CSI based on the location of the CSI reference resource.

Step 304: Report the acquired CSI to the base station according to the preset information format.

Here, the CSI request information may be set in a downlink control channel or RAR;

The RAR is an RAR under the contention access, and may also be an RAR under the non-contention access. The downlink control channel may be an ePDCCH or a newly defined narrowband PDCCH, and the actual range is not limited to these.

The preset information format may be content that the eNB requests the UE to report.

The CSI reference resource includes: a time domain reference resource and a frequency domain reference resource; the CSI is a CSI on the CSI reference resource, that is, a CSI corresponding to the CSI reference resource.

The CSI reference resource is all narrowbands that receive the specified information in the frequency domain, and all or part of the subframes that receive the specified information in the time domain;

or,

The CSI reference resource is a partial narrowband that receives the specified information in the frequency domain, and all or part of the subframes of the specified information in the time domain.

The specified information includes at least one of the following: the downlink control information, the RAR, or the PDSCH scheduled by the downlink control information, the downlink control information, and the PDSCH scheduled by the downlink control information.

The specified information may be repeatedly transmitted by the eNB in multiple subframes; the eNB may repeatedly transmit on a narrowband; or the eNB may be hopped and transmitted in multiple narrowbands.

The CSI reference resource is one or more narrowbands in the frequency domain, and the CSI reference resource is one or more subframes in the time domain.

The CSI reported by the UE in this embodiment includes at least one of the following:

The number of repetitions of the first repetition is that the number of repetitions required by the UE to reach the preset BLER is the first repetition number, and the MCS or SINR corresponding to the first repetition number is a value or an interval. Not preset for the eNB or the eNB. For example, the MCS is QPSK modulation, the 1/3 coding rate, or the MCS index value in the existing protocol, and is not limited to this manner.

Further, the MCS or SINR information may also be included in the downlink control signal. Within the interest rate.

If the CSI reference resource is a narrowband in the frequency domain, the number of repetitions reported by the UE is one repetition number corresponding to the narrowband.

If the CSI reference resource is a plurality of narrowbands in the frequency domain, the UE reports the number of repetitions as an average number of repetitions corresponding to all the narrowbands.

Or, if the CSI reference resource is a plurality of narrowbands in the frequency domain, the number of repetitions reported by the UE may be multiple repetition times corresponding to the plurality of narrowbands of the CSI reference resource in the frequency domain. For example, the CSI reference resource is a narrowband and a subframe in which the PDCCH reported by the CSI is triggered, and the PDCCH is repeatedly transmitted on the subframes #0 to 9. In the 10 subframes, the subframes #0 to 4 are on the narrowband #1. Transmit, CSI of subframes #5-9 is transmitted on narrowband #2, then the UE reports 2 repetition times, the first repetition number corresponds to narrowband #1, and the second repetition number corresponds to narrowband #2.

Further, the number of repetitions may be that the number of repetitions on the narrow band is arranged in a preset order, such as in order of increasing frequency, or in chronological order of narrow bands; or may be one or more of the plurality of narrow bands One or more repetitions corresponding to a narrow band,

Preferably, the UE selects the best one or more narrowbands. The best one or more narrowbands may be one or more narrowbands having a CQI above a predetermined threshold.

Further, the UE may also report the narrowband index. If the UE reports a narrow-band index, the narrow-band index may be an index that divides the entire system bandwidth according to a preset rule, for example, dividing a system bandwidth of 20 MHz into 17 narrowbands, and indexes are 0 to 16 respectively; The time-frequency index may be a time-order index. For example, the CSI reference resource is a time-frequency resource in which the downlink control information carrying the CSI request information is located, and the downlink control information is hopped four times in total, in chronological order. The narrow bands correspond to 0, 1, 2, and 3, respectively. If the UE reports multiple narrow-band indexes, the UE may separately report the indexes of the multiple narrowbands, for example, the CSI reference resource is a time-frequency resource where the downlink control information carrying the CSI request information is located, and the downlink control is performed. The information is hopped four times in total. According to the chronological order, the four narrowbands respectively correspond to 0, 1, 2, and 3, and the UE is required to report CSI on two narrowbands. If the UE selects a narrowband with indices of 1 and 2, then it is required. 4bit to represent the two indexes; in order to save the bit, a joint index can also be reported, the joint index is shared

The value of the species only needs 3 bits to indicate.

The reported repetition number information may be one of preset indexes, for example, there are 3 bits, which respectively represent 10, 20, 40, 60, 80, 100, 200, and 400 repetitions, and then the UE may report 3 bit information indicating that The number of repetitions on the narrow band. The repetition number information may also be notified by a similar coverage level. For example, there are 3 coverage levels, which are repeated 10 times, 50 times, 100 times, and represented by 2 bits.

At least one CQI, the CQI is a CQI corresponding to a specified number of repetitions.

The CSI reported by the UE is at least one CQI, indicating that the UE is at a preset BLER, and the number of repetitions is at least one CQI corresponding to the specified second repetition number, and the specified repetition number is preset or notified by the eNB.

Further, the specified number of repetitions is the number of subframes of the CSI reference resource in the time domain, or the number of subframes corresponding to a narrowband of the CSI reference resource in the frequency domain. For example, the CSI reference resource is the downlink control information carrying the CSI request information, and the downlink control information is repeatedly sent 100 times, and the UE reports an average CQI, and the number of repetitions of the reported CQI is 100; or, alternatively, the CSI reference resource For the downlink control information carrying the CSI request information, the downlink control information is repeatedly transmitted on four narrowbands, and is transmitted 25 times on each narrowband, and is transmitted 100 times in total, and the CQI reported by the UE is 4 CQIs, corresponding to 4 The NSI is narrowband and the number of repetitions is 100. Alternatively, the CSI reference resource is downlink control information carrying CSI request information, and the downlink control information is repeatedly transmitted on four narrowbands, and is sent 25 times on each narrowband, and the CQI reported by the UE is reported. It is 4 CQIs, corresponding to 4 narrow bands, and the number of repetitions is 25.

Further, the index of the second repetition number may also be included in the downlink control information, and the index is as in Embodiment 1.

If the CSI reference resource is a narrowband in the frequency domain, the CQI reported by the UE is a CQI corresponding to the narrowband.

If the CSI reference resource is a plurality of narrowbands in the frequency domain, the UE reports that the CQI is an average CQI corresponding to all the narrowbands. For example, the CSI reference resource is a narrowband and a subframe in which the PDCCH reported by the CSI is triggered, and the PDCCH is repeatedly transmitted on the subframes #0 to 9. In the 10 subframes, the subframes #0 to 4 are on the narrowband #1. Transmit, CSI of subframes #5-9 is transmitted on narrowband #2, then the UE reports 2 CQIs, the first CQI corresponds to narrowband #1, and the second CQI corresponds to narrowband #2.

Or, if the CSI reference resource is a plurality of narrowbands in the frequency domain, the CQI reported by the UE may be multiple CQIs corresponding to the plurality of narrowbands of the CSI reference resource in the frequency domain.

Further, the plurality of CQIs may be configured to arrange CQIs on the narrowband in a preset order, such as sequentially increasing in frequency, or in a chronological order of narrowbands; or may be one or more of the plurality of narrowbands One or more CQIs corresponding to the narrow bands, preferably, the UE selects the best one or more narrow bands.

Further, the UE also reports the narrowband index if the UE reports a narrowband index.

An index of the number of repetitions, and one or more CQIs corresponding to the number of repetitions.

The CSI reported by the UE is an index of the number of repetitions and an index of one or more CQIs corresponding to the number of repetitions.

If the CSI reference resource is a narrowband in the frequency domain, the number of repetitions reported by the UE and the CQI are the number of repetitions and CQI corresponding to the narrowband.

If the CSI reference resource is a plurality of narrowbands in the frequency domain, the number of repetitions reported by the UE and the CQI are an average repetition number and an average CQI corresponding to the all narrowbands.

Or, if the CSI reference resource is a plurality of narrowbands in the frequency domain, the number of repetitions reported by the UE is one repetition number corresponding to the multiple narrowbands, and multiple CQIs reported by the UE are multiple of the CSI reference resources in the frequency domain. Each of the narrow bands corresponds to a plurality of CQIs. For example, the UECSI reference resource is two narrowbands in the frequency domain, namely narrowband #1 and narrowband #2, and the information reported by the UE is a repetition number M, and two CQIs: CQI1 and CQI2, and the narrowband #1 corresponds to M and CQI1. , narrow band #2 corresponds to M and CQI2.

Further, the plurality of CQIs may be configured to arrange CQIs on the narrowband in a preset order, such as sequentially increasing in frequency, or in a chronological order of narrowbands; or may be one or more of the plurality of narrowbands One or more CQIs corresponding to a narrow band.

An index of a plurality of repetitions, and a plurality of CQIs corresponding to the plurality of repetitions respectively.

The CSI reported by the UE is an index of a plurality of repetition times and an index of a plurality of CQIs respectively corresponding to the plurality of repetition times.

If the CSI reference resource is a plurality of narrowbands in the frequency domain, the number of repetitions reported by the UE is a plurality of repetition times corresponding to each narrowband of the plurality of narrowbands, and the multiple CQIs reported by the UE are the frequency of the CSI reference resources. Multiple CQIs corresponding to multiple narrow bands on the domain. For example, the UE reports CSI on two narrowbands, namely narrowband #1 and narrowband #2, the information reported by the UE is a repetition number M1 and M2, and two CQIs: CQI1 and CQI2, and the narrowband #1 corresponds to M1 and CQI1, narrow band #2 corresponds to M2 and CQI2.

Further, the second repetition number and the plurality of CQIs may be arranged in a preset order, such as sequentially increasing in frequency, or in a chronological order of narrow bands; or may be one of the plurality of narrow bands Or one or more CQIs corresponding to a plurality of narrow bands.

The above is the content of the CSI reported by the UE.

Further, the preset information format is preset, or is notified by the eNB, for example, by RRC signaling, and may also be notified in the downlink control information, for example, using 2 bits to indicate that only the number of repetitions is reported, and only the CQI is reported. Report one of the number of repetitions and CQI.

If the downlink control information carrying the CSI request information is the scheduled PUSCH, the UE reports the CSI on the PUSCH.

If the downlink control information that carries the CSI request information is the scheduled PDSCH, the UE reports the CSI on a subsequent PUSCH, preferably, selects the first scheduled PUSCH, or the UE may also be in the preset sub- The CSI is reported on the PUCCH in the frame, or the UE may also report the CSI on a preset PUSCH resource in the preset subframe.

The RAR that carries the CSI request may be transmitted on the PUSCH resource corresponding to the uplink grant carried in the RAR.

Embodiment 4:

Different from the third embodiment, the UE determines the CSI reference resource according to a preset manner, for example, the reporting time is the subframe n, and the CSI reference resource is 20 subframes before the n-4 in the time domain, and the frequency domain is A narrow band of downlink signals is received on the 20 subframes. Or the latest subframe in which the PDSCH is received before the time of the reporting, for example, the time n is the reporting time, and the subframe in which the latest PDSCH is received is n-13 to n-4, and the PDSCH is repeatedly sent in the subframe. Then, the 10 subframes are CSI time domain reference resources, and the narrowband where the PDSCH is located is the CSI frequency domain reference resource.

The reporting manner of the UE is similar to that of the first embodiment.

Embodiment 5:

Different from the third embodiment, the eNB notifies the CSI reference resource of the UE, for example, in the downlink control information or the RAR.

The reporting manner of the UE is similar to that of the first embodiment.

Example 6:

Different from the first embodiment, the CSI reference resource is one or more narrowbands in all narrowbands of the downlink information received by the UE before the CSI is reported in the frequency domain, and the UE is in the one or the time domain in the frequency domain. All or part of the subframe corresponding to multiple narrowbands. For example, before the UE reports the time, the downlink information is received on the eight narrowbands, and the UE selects a best narrowband for reporting. The reporting manner of the UE is similar to that of the first embodiment.

Example VII.

An embodiment of the present invention provides a user terminal. As shown in FIG. 4, the user terminal includes:

a first processing unit 41, configured to acquire CSI;

The first communication unit 42 is configured to report the acquired CSI to the base station;

First number of repetitions;

Here, the user terminal may be an MTC user terminal.

The preset information format further includes: a modulation and coding strategy (MCS) corresponding to the first repetition number; or a signal to interference plus noise ratio (SINR) corresponding to the first repetition number. The MCS and the SINE may be preset in the user terminal or notified by the eNB.

The first repetition number is: the number of subframes of the CSI reference resource in the time domain, or CSI The number of subframes corresponding to a narrow band of the reference resource in the frequency domain.

The first processing unit is further configured to preset the preset information format; or obtain a preset information format from the base station by using the first communication unit.

The at least one CQI is the second repetition number of the CQI corresponding to the second repetition number being a preset value or a value notified by the base station. The at least one CQI is: an average CQI on the CSI reference resource; or a CQI corresponding to each narrowband of the plurality of narrowbands, where the plurality of narrowbands are multiple corresponding to the CSI reference resources in the frequency domain. Narrow band.

The first number of repetitions is one of the following:

The first communication unit is further configured to receive CSI request information sent by the base station. include:

The location of the CSI reference resource notified by the base station.

Example VIII.

An embodiment of the present invention provides a base station. As shown in FIG. 5, the base station includes:

The second communication unit 51 is configured to obtain the CSI reported by the user terminal according to the preset information format.

The second processing unit 52 is configured to schedule the user terminal according to the CSI;

The preset information format includes at least one of the following: a first repetition quantity; and channel quality indication information CQI corresponding to the first repetition quantity; at least one CQI.

Here, the user terminal may be an MTC user terminal.

The second communication unit 51 is configured to send CSI request information to the user terminal.

The at least one CQI is: an average CQI on the CSI reference resource; or, more Each of the narrowbands corresponds to a CQI, and the plurality of narrowbands are a plurality of narrowbands corresponding to the CSI reference resources in the frequency domain.

The sending the CSI request information to the user terminal includes:

Sending CSI request information to the user terminal by specifying information;

The first number of repetitions is one of the following:

The second communication unit 51 is configured to receive CSI request information sent by the base station.

The location of the CSI reference resource notified by the eNB.

Example IX.

An embodiment of the present invention provides a system for reporting channel state information. As shown in FIG. 6, the system includes:

The user terminal 61 is configured to obtain the CSI, and report the acquired CSI to the base station according to the preset information format. The CSI reported includes at least one of the following information: a first repetition quantity; and at least one channel quality. Instructing information CQI, the at least one CQI is a CQI corresponding to the second repetition number; the third repetition number, and the at least one CQI corresponding to the third repetition number; the fourth repetition number, and the fourth repetition number respectively At least two CQIs;

The base station 62 is configured to receive the CSI reported by the user terminal, and schedule the user terminal according to the reported CSI.

The functions of the user terminal and the base station in the embodiment are the same as those of the user terminal and the base station provided in Embodiment 7 of the sixth embodiment, and are not described herein.

Reporting the obtained CSI to the base station;

The CSI reported includes at least one of the following information:

First number of repetitions;

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.

The units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the above integration The unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by using hardware related to the program instructions, and the foregoing program can be stored in one meter. The computer can read the storage medium, and when executed, the program executes the steps including the foregoing method embodiments; and the foregoing storage medium includes: a mobile storage device, a read-only memory (ROM), and a random access. A medium that can store program code, such as a RAM (Random Access Memory), a disk, or an optical disk.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Industrial applicability

The method for reporting the channel state information provided by the present invention, the user terminal, the base station, and the system, so that the user terminal can obtain the CSI based on the location after the location of the CSI reference resource is determined, and report the CSI to the preset information format. The base station can ensure that the CQI in the reported information can be effectively used by the base station, thereby ensuring that the user terminal at the location of the low coverage is effectively scheduled by the base station.

Claims

A method for reporting channel state information is applied to a user terminal, and the method includes:

Obtaining channel state information CSI;

Reporting the obtained CSI to the base station;

The CSI reported includes at least one of the following information:

First number of repetitions;

At least one channel quality indication information CQI, the at least one CQI is a CQI corresponding to the second repetition number;

a third repetition number, and at least one CQI corresponding to the third repetition number;

The fourth repetition number, and the fourth repetition number respectively correspond to at least two CQIs.
The method of claim 1, wherein the obtaining the CSI comprises:

Determining the location of the channel state information CSI reference resource;

The CSI is obtained based on the location of the CSI reference resource.
The method of claim 1 wherein said first number of iterations comprises:

The modulation and coding strategy MCS corresponding to the first repetition number;

or,

The signal corresponding to the first repetition number is compared with the interference plus noise ratio.
The method according to claim 1, wherein the at least one CQI is the second repetition number of the CQI corresponding to the second repetition number being a preset value or a value notified by the base station.
The method according to claim 1, wherein the second number of repetitions is the same as the number of subframes in the time domain of the CSI reference resource;

or,

The number of subframes corresponding to a narrow band of the CSI reference resource in the frequency domain is the same.
The method of claim 1 wherein the method further comprises:

Presetting information to be included in the reported CSI; or acquiring information to be included in the reported CSI from the base station.
The method according to claim 1, wherein the reported CSI further includes the following information: an index of at least one narrow band.
The method of claim 1 wherein said at least one CQI is:

An average CQI on the CSI reference resource; or a CQI corresponding to each narrowband of the plurality of narrowbands, where the plurality of narrowbands are a plurality of narrowbands corresponding to the CSI reference resources in the frequency domain.
The method of claim 1 wherein the first number of repetitions is one of:

The first repetition number is an average repetition number on the CSI reference resource;

or,

The first repetition number includes a repetition number corresponding to each narrowband of the plurality of narrowbands, and the plurality of narrowbands are a plurality of narrowbands corresponding to the CSI reference resources in a frequency domain.
The method according to claim 1 or 2, wherein the method further comprises: receiving CSI request information sent by the base station.
The method of claim 10, wherein the receiving the CSI request information sent by the base station comprises:

Receiving CSI request information sent by the base station through the specified information;

The specified information includes at least one of the following: downlink control information, random access response information RAR, PDSCH scheduled by the downlink control information, or downlink control information and a PDSCH scheduled by the downlink control information.
The method of claim 11 wherein said determining a location of a CSI reference resource comprises at least one of:

The CSI reference resource is in the frequency domain for receiving all narrowbands of specified information, and the time domain is Receiving all or part of the subframe of the specified information; or

The CSI reference resource is a partial narrowband that receives the specified information in the frequency domain, and all or part of the subframes that receive the specified information in the time domain; or

The CSI reference resource is, in the frequency domain, one or more narrowbands of all narrowbands that have received downlink information before the CSI is reported, and all or part of the subframes corresponding to the one or more narrowbands in the time domain; or ,

Determining the CSI reference resource according to a preset manner; or

The location of the CSI reference resource notified by the base station.
A method for reporting channel state information is applied to a base station, where the method includes:

Obtaining the CSI reported to the user terminal;

Scheduling the user terminal according to the reported CSI;

The CSI reported by the user terminal includes at least one of the following information:

First number of repetitions;

At least one channel quality indication information CQI, the at least one CQI is a CQI corresponding to the second repetition number;

a third repetition number, and at least one CQI corresponding to the third repetition number;

The fourth repetition number, and the fourth repetition number respectively correspond to at least two CQIs.
The method of claim 13 wherein the method further comprises:

Sending CSI request information to the user terminal.
The method of claim 14, wherein the sending the CSI request information to the user terminal comprises:

Sending CSI request information to the user terminal by specifying information;

The specified information includes at least one of the following: downlink control information, random access response information RAR, PDSCH scheduled by the downlink control information, or downlink control information and a PDSCH scheduled by the downlink control information.
The method of claim 15, wherein the downlink control information or RAR comprises at least one of the following information:

Reporting a preset information format corresponding to the CSI;

The specified number of repetitions;

MCS or SINR;

The location of the CSI reference resource.
A user terminal, the user terminal comprising:

a first processing unit configured to acquire CSI;

a first communication unit, configured to report the acquired CSI to the base station;

The CSI reported in the report includes at least one of the following information:

First number of repetitions;

At least one channel quality indication information CQI, the at least one CQI is a CQI corresponding to the second repetition number;

a third repetition number, and at least one CQI corresponding to the third repetition number;

The fourth repetition number, and the fourth repetition number respectively correspond to at least two CQIs.
The user terminal according to claim 17, wherein the first processing unit is configured to determine a location of a channel state information CSI reference resource; and obtain a CSI based on a location of the CSI reference resource.
The user terminal according to claim 17, wherein the first number of repetitions comprises:

The modulation and coding strategy MCS corresponding to the first repetition number;

or,

The signal corresponding to the first repetition number is compared with the interference plus noise ratio.
The user terminal according to claim 18, wherein the at least one CQI is the second repetition number of the CQI corresponding to the second repetition number is a preset value or is a base station Known value.
The user terminal according to claim 18, wherein the second repetition number is: the same number of subframes as the CSI reference resource in the time domain;

or,

The number of subframes corresponding to a narrow band of the CSI reference resource in the frequency domain is the same.
The user terminal according to claim 18, wherein the first processing unit is further configured to preset information to be included in the reported CSI;

or,

The information to be included in the reported CSI is acquired from the base station by the first communication unit.
The user terminal according to claim 18, wherein the reported CSI further includes the following information: an index of at least one narrowband.
The user terminal of claim 18, wherein the at least one CQI is:

An average CQI on the CSI reference resource; or a CQI corresponding to each narrowband of the plurality of narrowbands, where the plurality of narrowbands are a plurality of narrowbands corresponding to the CSI reference resources in the frequency domain.
The user terminal according to claim 18, wherein the first number of repetitions is one of:

The first number of repetitions is an average number of repetitions on the CSI reference resource, or

The first repetition number includes a repetition number corresponding to each narrowband of the plurality of narrowbands, and the plurality of narrowbands are a plurality of narrowbands corresponding to the CSI reference resources in a frequency domain.
The user terminal according to claim 18 or 19, wherein the communication unit is configured to receive CSI request information sent by the base station.
The user terminal according to claim 26, wherein the first communication unit is configured to receive CSI request information sent by the base station by using the specified information;

The specified information includes at least one of the following: downlink control information, random access response information RAR, PDSCH scheduled by the downlink control information, or downlink control information and a PDSCH scheduled by the downlink control information.
The user terminal according to claim 27, wherein the first processing unit determines a location of the CSI reference resource, including at least one of the following:

The CSI reference resource is all narrowbands that receive the specified information in the frequency domain, and all or part of the subframes that receive the specified information in the time domain; or

The CSI reference resource is a partial narrowband that receives the specified information in the frequency domain, and all or part of the subframes that receive the specified information in the time domain; or

The CSI reference resource is, in the frequency domain, one or more narrowbands of all narrowbands that have received downlink information before the CSI is reported, and all or part of the subframes corresponding to the one or more narrowbands in the time domain; or ,

Determining the CSI reference resource according to a preset manner; or

The location of the CSI reference resource notified by the base station.
A base station, the base station comprising:

The second communication unit is configured to obtain the CSI reported by the user terminal;

a second processing unit, configured to schedule the user terminal according to the reported CSI;

The CSI reported by the user terminal includes at least one of the following information:

First number of repetitions;

At least one channel quality indication information CQI, the at least one CQI is a CQI corresponding to the second repetition number;

a third repetition number, and at least one CQI corresponding to the third repetition number;

The fourth repetition number, and the fourth repetition number respectively correspond to at least two CQIs.
The base station according to claim 30, wherein said second communication unit is configured to transmit CSI request information to said user terminal.
The base station according to claim 31, wherein the second communication unit is configured to send CSI request information to the user terminal by specifying information;

The specified information includes at least one of the following: downlink control information, random access response information RAR, PDSCH scheduled by the downlink control information, or downlink control information and a PDSCH scheduled by the downlink control information.
The base station according to claim 31, wherein the downlink control information or RAR comprises at least one of the following information:

Reporting a preset information format corresponding to the CSI;

The specified number of repetitions;

MCS or SINR;

The location of the CSI reference resource.
A system for reporting channel state information, the system comprising:

The user terminal is configured to obtain the channel state information CSI, and report the obtained CSI to the base station;

The base station is configured to receive the CSI reported by the user terminal, and schedule the user terminal according to the reported CSI;

The CSI reported in the report includes at least one of the following information:

First number of repetitions;

At least one channel quality indication information CQI, the at least one CQI is a CQI corresponding to the second repetition number;

a third repetition number, and at least one CQI corresponding to the third repetition number;

The fourth repetition number, and the fourth repetition number respectively correspond to at least two CQIs.