CN107431942B

CN107431942B - Method for reporting channel state information, user equipment and base station

Info

Publication number: CN107431942B
Application number: CN201580077835.XA
Authority: CN
Inventors: 杨晓东; 吕永霞; 张戬; 李秉肇; 权威; 苗金华; 胡振兴
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-04-10
Filing date: 2015-04-10
Publication date: 2020-09-08
Anticipated expiration: 2035-04-10
Also published as: WO2016161656A1; CN107431942A

Abstract

The invention discloses a reporting method of channel state information, user equipment and a base station, relates to the field of communication, and can solve the problem of inflexible reporting of the channel state information. The method comprises the following steps: the method comprises the steps that User Equipment (UE) receives control information sent by a base station, the control information comprises a first CSI request indication, the UE obtains a first CSI set type corresponding to the first CSI request indication according to the mapping relation between the CSI request indication and the CSI set type, the CSI request indication is used for indicating the UE to report aperiodic CSI, and then the UE sends a CSI measurement report to the base station, wherein the CSI measurement report comprises the aperiodic CSI corresponding to the first CSI set type. The embodiment of the invention is used for reporting the CSI to the base station by the UE.

Description

Method for reporting channel state information, user equipment and base station

Technical Field

The present invention relates to the field of communications, and in particular, to a method, a user equipment, and a base station for reporting channel state information.

Background

In the field of wireless communication, Channel State Information (CSI) is a Channel attribute of a communication link, and may include a Precoding Matrix Indicator (PMI), a Rank Indicator (RI), and a Channel Quality Indicator (CQI), and a User Equipment (UE) may report the CSI to a base station through Channel measurement, so that the base station may perform downlink scheduling according to the CSI reported by the UE.

Currently, CSI reporting is divided into periodic CSI reporting and aperiodic CSI reporting. For aperiodic CSI reporting, before 66 times of meeting in a third Generation Partnership Project Radio access network (3 GPP RAN), the UE has at most 5 carriers to aggregate, and if the base station triggers aperiodic CSI reporting of all carriers, the base station carries, through a Physical Downlink Control Channel (PDCCH), CSI request fields of 4 states including 2bits in Control information sent to the UE, so as to schedule the UE not to report or report which CSI sets. For example, when the 2bits is 00, it indicates that the base station does not trigger aperiodic CSI reporting this time, 01 indicates that only CSI of scheduling uplink carriers is triggered, 10 indicates that a first CSI reporting set configured by a scheduling higher layer is triggered, 11 indicates that a second CSI reporting set configured by the higher layer is triggered, and CSI of which carriers in each set is fixed.

However, if a carrier aggregation research project of a large number of component carriers on 3GPP RAN66 conference is passed, it is desirable to support UE to aggregate 32 carriers at most to work simultaneously, so that if CSI request fields of 4 states are continuously adopted to report CSI, and each CSI reporting set includes some carriers whose CSI is fixed, if the load of reporting CSI by UE is to be balanced, each CSI set includes less CSI, it is possible that CSI of different carriers cannot be reported to a base station, and the base station cannot know channel measurement information of a partial channel, so that reporting of CSI is inflexible.

Disclosure of Invention

The embodiment of the invention provides a method for reporting channel state information, a method for receiving channel state information, user equipment and a base station, which can solve the problem of inflexible CSI reporting.

In a first aspect, a method for reporting channel state information CSI is provided, where the method includes:

user Equipment (UE) receives control information sent by a base station, wherein the control information comprises a first CSI request indication;

the UE acquires a first CSI set type corresponding to the first CSI request indication according to a mapping relation between the CSI request indication and the CSI set type, wherein the CSI request indication is used for indicating the UE to report aperiodic CSI; and

the UE sends a CSI measurement report to the base station, wherein the CSI measurement report comprises aperiodic CSI corresponding to the first CSI set type.

With reference to the first aspect, in a first possible implementation manner of the first aspect, before the obtaining, by the UE, the first CSI set type, the method further includes:

the UE receives a first configuration signaling sent by the base station, wherein the first configuration signaling comprises the mapping relation;

the UE acquiring the first CSI set type comprises:

the UE acquires a first CSI set type corresponding to the first CSI request indication according to the mapping relation received from the first configuration signaling;

or the like, or, alternatively,

the UE acquiring the first CSI set type comprises:

and the UE acquires a first CSI set type corresponding to the first CSI request indication according to the mapping relation preconfigured by the UE.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the CSI set type is CSI of a carrier set, where the carrier set corresponds to a carrier carrying the control information, or the carrier set is a schedulable carrier carrying the control information; or

The CSI set type is CSI of a cell set, where the cell set corresponds to a cell carrying the control information, or the cell set is a schedulable cell carrying the control information.

With reference to the first aspect or the first possible implementation manner of the first aspect or the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, before the obtaining, by the UE, the first CSI set type, the method further includes:

the UE receives a second configuration signaling sent by the base station, wherein the second configuration signaling comprises a CSI set corresponding to the first CSI set type;

before the UE sends the CSI measurement report to the base station, the method further includes:

the UE acquires a CSI set corresponding to the first CSI set type, and the aperiodic CSI is the CSI corresponding to the CSI set;

or the like, or, alternatively,

the UE acquires a CSI set corresponding to the first CSI set type pre-configured by the UE, and the aperiodic CSI is CSI corresponding to the CSI set.

With reference to the first aspect to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, before the obtaining, by the UE, the first CSI set type, the method further includes:

the UE receives third configuration signaling sent by the base station, wherein the third configuration signaling comprises the type indicated by the CSI request;

the UE determines the CSI request indication contained in the control information according to the type of the CSI request indication;

or the like, or, alternatively,

before the UE acquires the first CSI set type, further comprising:

the UE determines the CSI request indication contained in the control information according to the type of the CSI request indication preconfigured by the UE.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the type of the CSI request indication is at least one of the following:

the CSI request indication is represented by at least 3 bits;

the CSI request indication is represented in a different format for the control information;

the CSI request indication is represented by information representing uplink scheduling or information representing downlink scheduling;

the CSI request indication is expressed by a Modulation and Coding Strategy (MCS) carried by the control information;

the CSI request indication is represented by a carrier identifier used by the base station for sending a Physical Downlink Control Channel (PDCCH) or an enhanced physical downlink control channel (ePDCCH);

the CSI request indication is represented by identification of a PDCCH group after physical downlink control channel PDCCH grouping or represented by identification of an ePDCCH group after enhanced physical downlink control channel ePDCCH grouping;

the CSI request indication is represented by an identifier of a group of schedulable carriers of a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH;

the CSI request indication is represented by an identifier of a wave band to which a Physical Downlink Control Channel (PDCCH) belongs;

the CSI request indication is represented by the number of resources, or time domain positions, or frequency domain positions for scheduling uplink transmission or downlink reception;

the CSI request indication is represented by indication information of the control information in a common search space or a UE search space.

With reference to the third possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the CSI set is at least one of:

grouping the carriers according to the carrier identifications to obtain the CSI of the same carrier group, or grouping the cells according to the cell identifications to obtain the CSI of the same cell group;

grouping different cells according to different attributive physical uplink control information PUCCH and then belonging to CSI of downlink carriers of the cells of the same PUCCH group;

grouping carriers according to different wave bands, and then enabling the carriers to belong to CSI of carriers of the same wave band or the same wave band combination;

CSI of a licensed spectrum carrier or CSI of an unlicensed spectrum carrier;

after configuring at least one CSI process for each carrier, grouping the CSI of the same carrier group according to different processes;

after configuring different subframe sets for each carrier, grouping CSI of the same carrier group after the carriers according to the different subframe sets;

the CSI to which the broadband channel quality indicator CQI belongs or the CSI to which the sub-band CQI belongs;

CSI of carriers belonging to the same physical downlink control channel PDCCH or enhanced downlink physical control channel ePDCCH scheduling;

CSI on different carriers belonging to the same antenna port.

In a second aspect, a method for receiving channel state information CSI is provided, including:

a base station sends control information to User Equipment (UE), wherein the control information comprises a first CSI request indication which is used for indicating the UE to report aperiodic CSI;

the base station receives a CSI measurement report sent by the UE, wherein the CSI measurement report comprises aperiodic CSI corresponding to the first CSI request indication.

With reference to the second aspect, in a first possible implementation manner of the second aspect, before the sending, by the base station, the control information to the UE, the method further includes:

and the base station sends a first configuration signaling to the UE, wherein the first configuration signaling comprises the mapping relation.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, before the sending, by the base station, the control information to the UE, the method further includes:

and the base station sends a second configuration signaling to the UE, wherein the second configuration signaling comprises a CSI set corresponding to the first CSI set type.

With reference to the second aspect or the first possible implementation manner or the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, before the base station sends the control information to the UE, the method further includes:

the base station sends third configuration signaling to the UE, wherein the third configuration signaling comprises the type indicated by the CSI request.

With reference to the second aspect or any one of the first possible implementation manner to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the type of the CSI request indication is at least one of the following:

the CSI request indication is represented by at least 3 bits;

With reference to the second possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the CSI set is at least one of:

CSI of a licensed spectrum carrier or CSI of an unlicensed spectrum carrier;

CSI on different carriers belonging to the same antenna port.

In a third aspect, a user equipment is provided, including:

a receiving unit, configured to receive control information sent by a base station, where the control information includes a first CSI request indication;

the obtaining unit is used for obtaining a first CSI set type corresponding to the first CSI request indication according to the mapping relation between the CSI request indication and the CSI set type stored in the storage unit, wherein the CSI request indication is used for indicating the UE to report the aperiodic CSI; and

a sending unit, configured to send, to the base station, a CSI measurement report after the obtaining unit obtains aperiodic CSI corresponding to the first CSI set type, where the CSI measurement report includes aperiodic CSI corresponding to the first CSI set type.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the receiving unit is further configured to receive a first configuration signaling sent by the base station, where the first configuration signaling includes the mapping relationship;

the obtaining unit is specifically configured to: acquiring a first CSI set type corresponding to the first CSI request indication from the storage unit according to the mapping relation received from the first configuration signaling;

or the like, or, alternatively,

the obtaining unit is specifically configured to: and acquiring a first CSI set type corresponding to the first CSI request indication according to the mapping relation pre-configured by the UE and stored in the storage unit.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the CSI set type is CSI of a carrier set, where the carrier set corresponds to a carrier carrying the control information, or the carrier set is a carrier that can be scheduled by the carrier carrying the control information; or

With reference to the third aspect or the first possible implementation manner of the third aspect or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect,

the receiving unit is further configured to receive a second configuration signaling sent by the base station, where the second configuration signaling includes a CSI set corresponding to the first CSI set type;

the acquisition unit is further configured to:

acquiring a CSI set corresponding to the first CSI set type from the storage unit, wherein the aperiodic CSI is the CSI corresponding to the CSI set;

or the like, or, alternatively,

the acquisition unit is further configured to:

and acquiring a CSI set corresponding to the first CSI set type pre-configured by the UE from the storage unit, wherein the aperiodic CSI is CSI corresponding to the CSI set.

With reference to the third aspect or the first possible implementation manner to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the receiving unit is further configured to receive third configuration signaling sent by the base station, where the third configuration signaling includes a type of the CSI request indication;

the obtaining unit is further configured to determine, according to a type of the CSI request indication, the CSI request indication included in the control information;

or the like, or, alternatively,

the obtaining unit is further configured to determine the CSI request indication included in the control information according to the type of the CSI request indication preconfigured by the UE.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the type of the CSI request indication is at least one of the following:

the CSI request indication is represented by at least 3 bits;

With reference to the third possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the CSI set is at least one of:

CSI of a licensed spectrum carrier or CSI of an unlicensed spectrum carrier;

CSI on different carriers belonging to the same antenna port.

In a fourth aspect, a base station is provided, comprising:

the processing unit is used for controlling the sending unit to send control information to User Equipment (UE), wherein the control information comprises a first CSI request indication which is used for indicating the UE to report aperiodic CSI;

a receiving unit, configured to receive a CSI measurement report sent by the UE, where the CSI measurement report includes aperiodic CSI corresponding to the first CSI request indication.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the sending unit is further configured to send a first configuration signaling to the UE, where the first configuration signaling includes the mapping relationship.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the sending unit is further configured to send a second configuration signaling to the UE, where the second configuration signaling includes a CSI set corresponding to the first CSI set type.

With reference to the fourth aspect or the first possible implementation manner or the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the sending unit is further configured to send a third configuration signaling to the UE, where the third configuration signaling includes the type of the CSI request indication.

With reference to the fourth aspect or any one of the third to the fourth possible implementation manners of the first possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the type of the CSI request indication is at least one of the following:

the CSI request indication is represented by at least 3 bits;

With reference to the second possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the CSI set is at least one of:

CSI of a licensed spectrum carrier or CSI of an unlicensed spectrum carrier;

CSI on different carriers belonging to the same antenna port.

In the embodiment of the invention, User Equipment (UE) receives control information sent by a base station, wherein the control information comprises a first CSI request indication, the UE acquires a first CSI set type corresponding to the first CSI request indication according to a mapping relation between the CSI request indication and the CSI set type, the CSI request indication is used for indicating the UE to report aperiodic CSI, and then the UE sends a CSI measurement report to the base station, and the CSI measurement report comprises aperiodic CSI corresponding to the first CSI set type, so that the UE can flexibly report different types of CSI to the base station according to the mapping relation between the CSI request indication sent by the base station and the CSI set type.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic flow chart of a method for reporting channel state information according to an embodiment of the present invention;

fig. 2 is a schematic flow chart of a method for receiving channel state information according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a user equipment according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a base station according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiments of the present invention may be applied to a Long Term Evolution (LTE) system, a Universal Mobile telecommunications system terrestrial Radio Access Network (UTRAN) system, a WIreless broadband-Fidelity (WIFI) system, and the like, and the present invention is not limited thereto.

In the embodiment of the present invention, a User Equipment (UE) may be any one of the following, and the UE may be static or mobile. The UE may include, but is not limited to: station (Station), mobile Station (MobileStation), Subscriber Unit (Subscriber Unit), Personal Computer (Personal Computer), Laptop (Laptop Computer), Tablet Computer (Tablet Computer), Netbook (Netbook), Terminal (Terminal), Cellular Phone (Cellular Phone), Handheld device (handle), Cordless Phone (Cordless Phone), Personal Digital Assistant (Personal Digital Assistant, abbreviation: PDA), Data Card (Data), Universal Serial Bus (Universal Serial Bus, abbreviation: USB) plug-in device, mobile WiFi hotspot device (mifis Devices), smart watch, smart glasses, Wireless Modem (english Modem), Wireless router, Wireless local loop (Wireless local loop, abbreviation: WLL) Station, etc.; the base station (NodeB) may be a base station in an LTE network, or a base station in a UTRAN network, etc.

The following embodiments of the present invention may be applicable to a scenario of aggregation of a large number of carriers, for example, a UE may aggregate 32 carriers to operate simultaneously.

An embodiment of the present invention provides a method for reporting channel state information, as shown in fig. 1, including:

101. and the UE receives control information sent by the base station, wherein the control information comprises a first CSI request indication.

The control information may be Downlink Control Information (DCI) sent by the base station to the UE, where the control information may include a CSI request indication for scheduling the UE to report the aperiodic CSI or not to report the aperiodic CSI, so that the base station can know an instant state of a channel according to the CSI reported by the UE, so that the communication system adapts to a current channel condition, and a guarantee is provided for high-reliability and high-rate communication in a multi-antenna system.

The CSI may include PMI, RI, CQI, and the like, and thus, for CQI, periodic CQI reporting and aperiodic CQI reporting may also be considered. From the base station side, the reporting time of the aperiodic CQI is complex, and may be triggered when downlink data needs to be sent in a certain cell, or may be triggered when a subframe in which the UE needs to send data is exactly the same as the reporting time of the CQI, and the CQI is carried in a Physical Uplink Shared Channel (PUSCH) Channel at this time, and in order to obtain a more detailed CQI report, the base station triggers an aperiodic reporting mode, and the like.

It should be noted that the CSI request indication in the present invention is not limited to be represented by 2bits, for example, when 32-carrier aggregation is adopted, different formats of downlink control information DCI may be adopted for representation, or different indications are represented by MCS carried in DCI, and the present invention is not limited thereto.

102. The UE acquires a first CSI set type corresponding to the first CSI request indication according to a mapping relation between the CSI request indication and the CSI set type, wherein the CSI request indication is used for indicating the UE to report aperiodic CSI.

The CSI set type in the embodiment of the present invention may be understood as indication information used for indicating a CSI set, for example, a CSI request indication (CSI request field) is "001", and a CSI set type corresponding to "001" is "triggering reporting of a first CSI set configured by a higher layer". The CSI set represents a set of objects for reporting CSI; the object may be at least one of a carrier, a CSI process, and a subframe set, for example. For example, the first CSI set may be a CSI process and a subframe set.

When the CSI request indicator is used to schedule the UE to report the aperiodic CSI, since the mapping relationship between the CSI request indicator and the CSI set type is stored in the UE, the UE may obtain the corresponding CSI according to the mapping relationship, for example, the mapping relationship may be mapping between different CSI request indicators and different CQI set types. Different CSI set types correspond to different CSI sets.

The mapping relationship may be pre-configured in the UE and the base station by using a pre-defined manner, or the mapping relationship may be stored by the base station sending a configuration signaling notification to the UE, and similarly, for the CSI request indication and the CSI set, the type of the CSI request indication and the CSI set may be pre-configured in the UE and the base station by using a pre-defined manner, or the mapping relationship may be stored by the base station sending a configuration signaling notification to the UE.

It should be noted that, the CSI sets in the present invention may be various, for example, carriers may be grouped according to different bands, so that CSI carried on carriers is also assigned to different carrier groups, or may be grouped according to carriers, for example, 32 carriers may be assigned to one group according to carrier identifiers, and the last 16 carriers may be assigned to one group, or may be grouped in other manners, which is not limited in the present invention.

103. The sending of a CSI measurement report to the base station, the CSI measurement report including aperiodic CSI corresponding to the first CSI set type.

For example, after the UE acquires the aperiodic CQI corresponding to the CSI request indication, a CQI measurement report carrying the aperiodic CQI is sent to the base station, so that the base station can know the instantaneous state of the channel according to the CQI measurement report.

The following specifically describes steps 101 to 103.

Further, if the mapping relationship is configured by the base station through signaling for the UE, before the UE acquires the first CSI set type, the method further includes:

further, the obtaining, by the UE, the first CSI set type includes:

and the UE acquires a first CSI set type corresponding to the first CSI request indication according to the mapping relation received from the first configuration signaling.

Of course, if a pre-determined approach is adopted, the UE acquiring the first CSI set type includes:

It should be noted that the CSI set type may be CSI of a carrier set, where the carrier set corresponds to a carrier carrying the control information, or the carrier set is a schedulable carrier carrying the control information; or

The CSI set type may be CSI of a cell set, where the cell set corresponds to a cell carrying the control information, or the cell set is a schedulable cell carrying the control information.

When the CSI set is configured by the base station to the UE through signaling, before the UE acquires the first CSI set type, the method further includes:

thus, before the UE sends the CSI measurement report to the base station, the method further includes:

the UE acquires a CSI set corresponding to the first CSI set type, and the aperiodic CSI is CSI corresponding to the CSI set.

Here, the CSI set types may be, for example: and triggering a first CSI set configured by a high layer, triggering a second CSI set configured by the high layer and the like, and further acquiring the CSI set according to the CSI corresponding to the first CSI set.

When the type of the CSI set is an advanced manner, before the UE sends the CSI measurement report to the base station, the method further includes:

In addition, when the type indicated by the CSI request is obtained by the base station sending a configuration signaling to the UE, before the UE obtains the first CSI set type, the method further includes:

and the UE determines the CSI request indication contained in the control information according to the type of the CSI request indication.

When the type indicated by the CSI request is in a time-advanced manner, before the UE acquires the first CSI set type, the method further includes:

Further, grouping of the CSI sets in the above steps may adopt different grouping rules, so that different CSI set types correspond to different CSI sets, for example, the CSI set type may be at least one of the following:

a 1: and grouping the carriers according to the carrier identifications to obtain the CSI of the same carrier group or the CSI of the same cell group grouped according to the cell identifications. For example, for 32-carrier aggregation, the first 16 carriers identified as 1-16 of the 32 carriers may be grouped together, and the last 16 carriers identified as 17-32 may be grouped together, or for cells on the 32 carriers aggregated, the first 16 cells identified as 1-16 of the 32 carriers may be grouped together, and the last 16 cells identified as 17-32 may be grouped together;

b 1: grouping different cells according to Physical uplink control information (PUCCH) belonging to different cells, and then obtaining CSI of downlink carriers of the cells belonging to the same PUCCH group. For example, a plurality of PUCCHs may be configured for Carrier Aggregation (CA) in the current R13 release, that is, control information of different carriers, such as acknowledgement messages, CSI messages, and the like, may be fed back to a base station on different PUCCHs, so that carriers belonging to the same PUCCH may be grouped into one PUCCH group according to different cells, that is, CSI of carriers of the same PUCCH group may be grouped into one set;

c 1: grouping carriers according to different bands (bands) and then enabling the carriers to belong to CSI of carriers of the same band or the same band combination. For example, when dividing according to the electromagnetic wave spectrum, the wave bands can be divided into long waves, short waves, ultra-short waves and the like, so that carriers belonging to different wave bands are classified into one set, and the CSI on the carriers is divided into different sets; short waves and ultrashort waves can also be grouped into one group, and the like;

d 1: the CSI of the authorized spectrum carrier or the CSI of the unauthorized spectrum carrier, so that the CSI sent on the authorized spectrum carrier is classified as a CSI set, and the CSI sent on the unauthorized spectrum carrier is classified as a CSI set;

e 1: after at least one CSI process is configured for each carrier, CSI of the same carrier group after carrier grouping is performed according to different processes, for example, for a UE in Transmission Mode (TM) 10, multiple CSI processes may be configured on each carrier, and then carriers are grouped according to different processes, so that CSI of the same carrier group may be grouped into one CSI set;

f 1: and after configuring different subframe sets for each carrier, grouping the CSI of the same carrier group after the carriers are grouped according to the different subframe sets. For example, different subframe sets may be configured for each carrier, and the subframe sets are grouped according to the interference degree of the subframe, and CSI on carriers belonging to the same subframe set may be classified as one CSI set;

g 1: and grouping the CSI to which the wideband CQI belongs or the CSI to which the sub-band CQI belongs according to whether the CQI is the wideband CQI or the sub-band CQI when reporting.

h 1: CSI belonging to carriers scheduled by the same Physical Downlink Control Channel (PDCCH) or Enhanced Physical Downlink Control Channel (ePDCCH).

i 1: CSI on different carriers belonging to the same antenna port. For example, the CSI on antenna port 1 on different carriers are all grouped into the same CSI set.

Of course, the multiple CSI grouping rules may also be grouped in any combination of two or more, and the present invention is not limited thereto.

Different indication rules may also be adopted for the configuration of the CSI request indication in the above step to indicate different CSI sets, for example, any one of the following may be used:

a 2: for a large number of carrier aggregation, for example, 32 carrier aggregation, at least 3 bits may be used to implement mapping of more CSI request indications to different CSI sets, so that different CSI request indications may be represented by using different 3 bits of information, for example, 011 represents a first CSI set, and so on;

b 2: the CSI request indication may adopt control information, and may specifically be represented by different formats (formats) of downlink control information DCI, for example, different formats such as 1D, 2A, 1C in DCI formats may be mapped with different types of CSI sets, that is, different DCI formats are used to represent different CSI request indications;

c 2: the CSI request indication may be represented by information characterizing uplink scheduling or information characterizing downlink scheduling to distinguish different CSI sets. For example, 00 represents a CSI set corresponding to uplink scheduling, and 01 represents a CSI set corresponding to downlink scheduling;

d 2: the CSI request indication may be represented by a Modulation and Coding Scheme (MCS) carried by the DCI, for example, different Modulation schemes are used to indicate different CSI sets, or different coding schemes are used to indicate different CSI sets;

e 2: the CSI request indication may be represented by carrier identifier of a carrier used by the base station to transmit a Physical Downlink Control Channel (PDCCH) or an enhanced Physical downlink control Channel (enhanced epdcch). For example, in 32-carrier aggregation, different CSI sets are respectively mapped by using PDCCH or ePDCCH sent on carrier 1, carrier 2, and carrier 3 in a manner of pre-engagement or base station configuration between a base station and a UE, so that the UE can determine different CSI sets according to carrier information received on the PDCCH or ePDCCH;

f 2: the CSI request indication can be represented by identification of a PDCCH or ePDCCH group after the PDCCH or ePDCCH is grouped, and specifically, after the PDCCH or ePDCCH is grouped, different CSI request indications are represented by identification of different PDCCH groups or identification of ePDCCH groups, and then mapped to different CSI sets;

g 2: the CSI request indication can be represented by identification of a PDCCH or ePDCCH schedulable carrier group, and different CSI request indications can be represented by the PDCCH or ePDCCH schedulable carrier group belonging to the same PDCCH or ePDCCH and then mapped to different CSI sets;

h 2: the CSI request indication can adopt the identification of the wave band to which the PDCCH belongs to represent different CSI request indications, and further the CSI on the carriers belonging to different wave bands can be classified into different CSI sets and CSI request indication mapping;

i 2: the CSI request indication may be represented by the number of resources, or time domain location, or frequency domain location, for scheduling uplink transmission or downlink transmission, so as to represent different CSI request indications, and further map to different CSI sets.

j 2: the CSI request indication may be represented using whether the DCI is in a common search space or a UE search space to imply different CSI request indications, which in turn map to different CSI sets. For example, if the UE transmits a request for transmission of CSI received in the common search space indicating CQIs of all carriers mapped.

Of course, the above multiple CSI request indications may be expressed by any two or more combinations of rules.

After different CSI request indications and CSI sets of different CSI set types are configured for the UE in a pre-configured manner or in a manner that the base station configures the network for the UE, the mapping relationship between the CSI request indication and the CSI set type may also be configured for the UE in a pre-configured manner or in a manner that the base station configures the network for the UE. The mapping relationship may be one-to-one mapping between the CSI request indicator and the CSI set type, or may be one-to-many mapping, many-to-one mapping, many-to-many mapping, or the like.

Then, the base station can use different CSI request indications to trigger aperiodic CSI reporting, and the UE feeds back different CSI to the base station according to the mapping relationship.

For example, by combining the rule a1 and the rule e2, when the CSI request of the base station indicates that the carrier identifier of the carrier used by the base station to send the PDCCH is used to indicate, the CSI set type is to trigger the reporting of the first CSI set configured by the higher layer, and the CSI corresponding to the first CSI set is the CSI of the same carrier group obtained by grouping the carriers according to the carrier identifiers, the base station can send the PDCCH on different carriers to indicate that different carriers and CSI with different numbers of carriers are triggered.

For example, when the UE can support 32-carrier aggregation, the base station sends, on carrier 1, a request indication that the PDCCH triggers the UE to report the aperiodic CSI indicates that the UE needs to report a first CSI set, that is, the CSI set is of a first CSI set type, the CSI of the first CSI set is CSI of all 32 carriers, sends, on carrier 2, a request indication that the PDCCH triggers the UE to report the aperiodic CSI indicates that the UE needs to report a second CSI set, that is, the CSI set is of a second CSI set type, the second CSI set is CSI of the first 16 carriers identified as 1 to 16, and sends, on carrier 3, a request indication that the PDCCH triggers the UE to report the aperiodic CSI indicates that the UE needs to report a third CSI set, that is, the CSI set is of a third CSI set type, and the third CSI set is CSI of 16 carriers identified as 17 to 32. For this example, the mapping relationship of the CSI request indication and the CSI set type may be as shown in table 1.

TABLE 1

The indication modes of '00' and '01' may be the same as those in the prior art, and respectively indicate that the UE is not triggered to report the aperiodic CSI and that the UE is triggered to report the CSI of the uplink carrier, where '1', '2', and '3' indicate identifiers of carriers, and different carrier identifiers are mapped with different CSI sets.

For another example, by combining the rule b1 and the rule a2, for a large number of carrier aggregation, for example, 32 carrier aggregation, when a CSI set corresponding to a CSI set type is a CSI set that is obtained by grouping different cells according to different attributions of physical uplink control information PUCCHs, and at least 3 bits are used for CSI of downlink carriers of the cells belonging to the same PUCC group and CSI request indications to realize that more CSI request indications (CSI request fields) are mapped to different CSI set types, the CSI request fields in the DCI may be specifically mapped to different CSI set types by increasing the number of bits, for example, increasing the number of bits from 2bits to 3 bits, of the CSI request fields in the DCI to trigger reporting of CSI by carriers in different PDCCH groups. For example, 011 indicates that the base station triggers the UE to report a first CSI set corresponding to a carrier in a first PUCCH group, 100 indicates that the base station triggers the UE to report a second CSI set corresponding to a CSI of a carrier in a second PUCCH group, 101 indicates that the base station triggers the UE to report a third CSI set corresponding to a CSI of a carrier in a third PUCCH group, and the like.

For another example, by combining rule c1 and rule h2, when the CSI set corresponding to the CSI set type is a CSI that belongs to the same band or a carrier of the same band combination after the carriers are grouped according to different bands, and the CSI request indication indicates different CSI request indications by using the identifier of the band to which the PDCCH belongs, if the CSI request indication is an identifier of a certain band, it indicates that the base station triggers the UE to report the CSI of the carrier of the band.

The embodiment of the invention provides a method for reporting channel state information, which can be used for aggregation of a large number of carriers, wherein control information sent by a base station is received by UE (user equipment), the control information comprises a first CSI request indication, the representation mode of the first CSI request indication is different from that of the prior art and can contain 3 bits or other indication information, the UE acquires a first CSI set type corresponding to the first CSI request indication according to the mapping relation between the CSI request indication and the CSI set type, wherein the CSI request indication is used for indicating the UE to report aperiodic CSI, the CSI sets corresponding to the CSI set types can be various, for example, the CSI sets grouped according to different carriers, different bands and different PUCCHs, and then the UE sends CSI measurement reports to the base station, wherein the CSI measurement reports comprise CSI sets corresponding to the CSI request indication, therefore, compared with the prior art that 4 CSI request indications represented by 2bits are mapped with 4 CQI sets, the technical scheme of the invention adopts multiple CSI request indication modes and multiple types of CSI sets, so that the number of the CSI request indications and the number of the CSI sets of different types can be increased, and the CSI reporting is more flexible for the aggregation of a large number of carriers.

For example, for 32 carrier aggregation, compared with the prior art in which 4 CSI request indications are used, the first 2 indications respectively indicate that the UE is not triggered to report the aperiodic CQI and report the CQI of the uplink carrier, and the last two indications are respectively mapped with the first CQI set and the second CQI set, where the first CQI set and the second CQI set may include excessive CQIs, but this may cause the uplink PUSCH of the UE to carry too heavy load and uplink PUSCH coverage to be reduced, but if 3 bits in the technical solution of the present invention are used to indicate more CQI sets, the CQIs may be reported in multiple sets, and the base station may report different CSI sets according to the UE that needs to be triggered, so that the uplink PUSCH carries more balanced; if the prior art adopts each CQI set to contain less CQI, the base station can not know the instant state of partial channels and can not acquire a more preferable channel state, but the base station can know more channel state information according to the needs by adopting various types of CQI, so that the communication system can better adapt to the current channel condition, and the high-reliability high-speed communication is guaranteed in a multi-antenna system.

Correspondingly, for the base station side, the embodiment of the invention also provides a method for receiving the channel state information. The same contents may refer to the description in the above embodiments, and the description of this embodiment is not repeated. As shown in fig. 2, the method includes:

201. the method comprises the steps that a base station sends control information to User Equipment (UE), wherein the control information comprises a first CSI request indication, and the first CSI request indication is used for indicating the UE to report aperiodic CSI.

202. The base station receives a CSI measurement report sent by the UE, wherein the CSI measurement report comprises aperiodic CSI corresponding to the first CSI request indication.

Optionally, before the base station sends the control information to the UE, the method may further include:

Optionally, before the base station sends the control information to the UE, the method may further include: the base station sends third configuration signaling to the UE, wherein the third configuration signaling comprises the type indicated by the CSI request.

Of course, the mapping relationship, the CSI set corresponding to the CSI set type, and the type of the CSI request indication may also be configured in the UE and the base station in a pre-determined manner.

The CSI request indication type in this embodiment may refer to the description in the above embodiments.

The CSI set type in this embodiment may also refer to the description in the above embodiments.

The embodiment of the invention provides a method for receiving channel state information, wherein a base station sends control information to User Equipment (UE), the control information comprises a first CSI request indication, the first CSI request indication is used for indicating the UE to report aperiodic CSI, and then the base station receives a CSI measurement report sent by the UE, the CSI measurement report comprises aperiodic CSI corresponding to the first CSI request indication, so that the UE can flexibly report a CSI set to the base station according to the mapping relation between the CSI request indication and the CSI set type.

An embodiment of the present invention further provides a user equipment 03, where the user equipment 03 can perform steps related to the user equipment in the foregoing embodiment, and the same contents may refer to the description in the foregoing embodiment, and are not described again in this embodiment. As shown in fig. 3, the user equipment 03 includes:

a receiving unit 031, configured to receive control information sent by a base station, where the control information includes a first CSI request indication;

an obtaining unit 032, configured to obtain, according to a mapping relationship between the CSI request indicator and a CSI set type stored in the storage unit 034, a first CSI set type corresponding to the first CSI request indicator, where the CSI request indicator is used to indicate that the UE reports aperiodic CSI; and

a sending unit 033, configured to send, after the obtaining unit 032 obtains aperiodic CSI corresponding to the first CSI set type, a CSI measurement report to the base station, where the CSI measurement report includes aperiodic CSI corresponding to the first CSI set type.

Optionally, the receiving unit 031 is further configured to receive a first configuration signaling sent by the base station, where the first configuration signaling includes the mapping relationship;

the obtaining unit 032 may be specifically configured to: obtaining, from the storage unit 034, a first CSI set type corresponding to the first CSI request indication according to the mapping relationship received from the first configuration signaling;

or the like, or, alternatively,

the obtaining unit 032 may be specifically configured to: obtaining a first CSI set type corresponding to the first CSI request indication according to the mapping relationship pre-configured by the UE and stored in the storage unit 034.

Optionally, the CSI set type is CSI of a carrier set, where the carrier set corresponds to a carrier carrying the control information, or the carrier set is a schedulable carrier carrying the control information; or

Optionally, the receiving unit 031 is further configured to receive a second configuration signaling sent by the base station, where the second configuration signaling includes a CSI set corresponding to the first CSI set type;

the obtaining unit 032 may further be configured to:

acquiring a CSI set corresponding to the first CSI set type from the storage unit 034, where the aperiodic CSI is CSI corresponding to the CSI set;

or the like, or, alternatively,

the obtaining unit 032 may further be configured to:

obtaining, from the storage unit 034, a CSI set corresponding to the first CSI set type preconfigured by the UE, where the aperiodic CSI is CSI corresponding to the CSI set.

Optionally, the receiving unit 031 is further configured to receive a third configuration signaling sent by the base station, where the third configuration signaling includes a type of the CSI request indication;

the obtaining unit 032 may further be configured to determine, according to a type of the CSI request indication, the CSI request indication included in the control information;

or the like, or, alternatively,

the obtaining unit 032 may be further configured to determine the CSI request indication included in the control information according to a type of the CSI request indication preconfigured by the UE.

The embodiment of the invention provides user equipment, which is particularly characterized in that the User Equipment (UE) receives control information sent by a base station, the control information comprises a first CSI request indication, the UE acquires a first CSI set type corresponding to the first CSI request indication according to a mapping relation between the CSI request indication and the CSI set type, wherein the CSI request indication is used for indicating the UE to report aperiodic CSI, and then the UE sends a CSI measurement report to the base station, wherein the CSI measurement report comprises the aperiodic CSI corresponding to the first CSI set type, so that the UE can flexibly report different types of CSI to the base station according to the mapping relation between the CSI request indication sent by the base station and the CSI set type.

It should be noted that the receiving unit 031 in the above embodiments may be implemented by a receiver or a transceiver. The obtaining unit 032 in the above embodiments may be implemented by a processor, or may be implemented by other circuit units with processing functions. The sending unit 033 in the above-described embodiment may be implemented by a transmitter or a transceiver. The storage unit in the above embodiments may be a memory.

An embodiment of the present invention further provides a base station 04, where the base station 04 is capable of performing the steps performed by the base station in the foregoing method embodiment, and the same contents may refer to the description in the foregoing embodiment, and are not described herein again. As shown in fig. 4, the base station 04 includes:

a processing unit 043, configured to control the sending unit 041 to send control information to a user equipment UE, where the control information includes a first CSI request indication, and the first CSI request indication is used to indicate that the UE reports aperiodic CSI;

a receiving unit 042, configured to receive a CSI measurement report sent by the UE, where the CSI measurement report includes aperiodic CSI corresponding to the first CSI request indication.

The processing unit 043 is coupled to the receiving unit 042 and the sending unit 041.

Optionally, the sending unit 041 may be further configured to send a first configuration signaling to the UE, where the first configuration signaling includes the mapping relationship.

Optionally, the sending unit 041 may be further configured to send a second configuration signaling to the UE, where the second configuration signaling includes a CSI set corresponding to the first CSI set type.

Optionally, the sending unit 041 may be further configured to send a third configuration signaling to the UE, where the third configuration signaling includes the type indicated by the CSI request.

The embodiment of the invention provides a base station, which sends control information to User Equipment (UE), wherein the control information comprises a first CSI request indication, the first CSI request indication is used for indicating the UE to report aperiodic CSI, and then the base station receives a CSI measurement report sent by the UE, the CSI measurement report comprises aperiodic CSI corresponding to the first CSI request indication, so that the UE can flexibly report a CSI set to the base station according to the mapping relation between the CSI request indication and the CSI set type.

It should be noted that the receiving unit 042 in the above embodiments may be implemented by a receiver, or may be implemented by a transceiver. The processing unit 043 in the above embodiments may be implemented by a processor, or may be implemented by other circuit units having a processing function. The sending unit 041 in the above-described embodiment may be implemented by a transmitter or a transceiver. The storage unit in the above embodiments may be a memory.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or 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, devices or units, and may be in an electrical, mechanical or other form.

In addition, in the apparatus and the system in each embodiment of the present invention, each functional unit may be integrated into one processing unit, or each unit may be separately and physically included, or two or more units may be integrated into one unit. And the above units can be realized in the form of hardware, or in the form of hardware plus software functional units.

All or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for reporting CSI (channel State information), is characterized in that the method comprises the following steps:

user Equipment (UE) receives control information from a base station, wherein the control information comprises a first CSI request indication;

the UE acquires a first CSI set type corresponding to the first CSI request indication according to a mapping relation between the CSI request indication and the CSI set type, wherein the first CSI request indication is used for indicating the UE to report aperiodic CSI; and

the UE sends a CSI measurement report to the base station, wherein the CSI measurement report comprises aperiodic CSI corresponding to the first CSI set type;

wherein, before the UE acquires the first CSI set type, the method further comprises:

the UE receives third configuration signaling from the base station, wherein the third configuration signaling comprises a type of the first CSI request indication, and the type of the first CSI request indication is represented by at least 3 bits for the CSI request indication;

and the UE determines the first CSI request indication contained in the control information according to the type of the first CSI request indication.

2. The method of claim 1, wherein before the UE acquires the first CSI set type, further comprising:

the UE receives first configuration signaling from the base station, wherein the first configuration signaling comprises the mapping relation;

the UE acquiring the first CSI set type comprises:

3. The method according to claim 1 or 2,

the CSI set type is CSI of a carrier set, wherein the carrier set corresponds to a carrier carrying the control information, or the carrier set is a schedulable carrier carrying the control information; or

4. The method of claim 1 or 2, further comprising, before the UE acquires the first CSI set type:

the UE receives second configuration signaling from the base station, wherein the second configuration signaling comprises a CSI set corresponding to the first CSI set type;

5. The method of claim 4, wherein the CSI set is at least one of:

CSI of a licensed spectrum carrier or CSI of an unlicensed spectrum carrier;

CSI on different carriers belonging to the same antenna port.

6. A method for receiving Channel State Information (CSI), comprising:

the base station receives a CSI measurement report from the UE, wherein the CSI measurement report comprises aperiodic CSI corresponding to the first CSI request indication;

wherein, before the base station transmits the control information to the UE, the method further comprises:

the base station sends third configuration signaling to the UE, wherein the third configuration signaling comprises the type of the first CSI request indication, and the type of the first CSI request indication is represented by at least 3 bits for the CSI request indication.

7. The method of claim 6, wherein before the base station sends the control information to the UE, the method further comprises:

the base station sends a first configuration signaling to the UE, wherein the first configuration signaling comprises a mapping relation.

8. The method of claim 6 or 7, wherein before the base station sends the control information to the UE, the method further comprises:

9. The method of claim 8, wherein the CSI set is at least one of:

CSI of a licensed spectrum carrier or CSI of an unlicensed spectrum carrier;

CSI on different carriers belonging to the same antenna port.

10. A user device, comprising:

a receiving unit, configured to receive control information from a base station, where the control information includes a first CSI request indication;

an obtaining unit, configured to obtain a first CSI set type corresponding to the first CSI request indication according to a mapping relationship between the CSI request indication and the CSI set type stored in a storage unit, where the first CSI request indication is used to indicate the UE to report the aperiodic CSI; and

a sending unit, configured to send, to the base station, a CSI measurement report after the obtaining unit obtains aperiodic CSI corresponding to the first CSI set type, where the CSI measurement report includes aperiodic CSI corresponding to the first CSI set type;

wherein the receiving unit is further configured to receive third configuration signaling from the base station, where the third configuration signaling includes a type of the first CSI request indication, and the type of the first CSI request indication is represented by at least 3 bits for the CSI request indication; and

the obtaining unit is further configured to determine, according to a type of the first CSI request indication, the first CSI request indication included in the control information.

11. The UE of claim 10, wherein the receiving unit is further configured to receive a first configuration signaling from the base station, and wherein the first configuration signaling includes the mapping relationship;

the obtaining unit is specifically configured to: and acquiring a first CSI set type corresponding to the first CSI request indication from the storage unit according to the mapping relation received from the first configuration signaling.

12. The user equipment according to claim 10 or 11,

13. The UE of claim 10 or 11, wherein the receiving unit is further configured to receive second configuration signaling from the base station, where the second configuration signaling includes a CSI set corresponding to the first CSI set type;

the acquisition unit is further configured to:

and acquiring a CSI set corresponding to the first CSI set type from the storage unit, wherein the aperiodic CSI is the CSI corresponding to the CSI set.

14. The UE of claim 13, wherein the CSI set is at least one of:

CSI of a licensed spectrum carrier or CSI of an unlicensed spectrum carrier;

CSI on different carriers belonging to the same antenna port.

15. A base station, comprising:

a receiving unit, configured to receive a CSI measurement report from the UE, where the CSI measurement report includes aperiodic CSI corresponding to the first CSI request indication;

wherein the sending unit is further configured to send a third configuration signaling to the UE, where the third configuration signaling includes a type of the first CSI request indication, and the type of the first CSI request indication is represented by at least 3 bits for the CSI request indication.

16. The base station of claim 15, wherein the sending unit is further configured to send a first configuration signaling to the UE, and wherein the first configuration signaling includes a mapping relationship.

17. The base station according to claim 15 or 16, wherein the sending unit is further configured to send a second configuration signaling to the UE, where the second configuration signaling includes a CSI set corresponding to the first CSI set type.

18. The base station of claim 17, wherein the CSI set is at least one of:

CSI of a licensed spectrum carrier or CSI of an unlicensed spectrum carrier;

CSI on different carriers belonging to the same antenna port.

19. A computer-readable storage medium having stored thereon instructions that, when executed, cause a communication device to perform the method of any of claims 1-5 or 6-9.

20. An apparatus for reporting CSI, comprising a processor and a storage medium, wherein the storage medium stores instructions that, when executed by the processor, cause the apparatus to perform the method of any one of claims 1 to 5.

21. An apparatus for receiving channel state information, CSI, comprising a processor and a storage medium storing instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 6-9.