CN106998239B

CN106998239B - method and device for receiving CSI (channel State information) and reporting CSI

Info

Publication number: CN106998239B
Application number: CN201610053558.5A
Authority: CN
Inventors: 李静; 李翔; 胡乐薇
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-01-26
Filing date: 2016-01-26
Publication date: 2019-12-06
Anticipated expiration: 2036-01-26
Also published as: CN106998239A

Abstract

The invention discloses a method and a device for receiving CSI (channel state information) and reporting the CSI, which are used for reducing PUCCH (physical uplink control channel) resources occupied by multi-carrier CSI under CA. The method for receiving CSI comprises the following steps: for each UE, determining time-frequency resources used for receiving CSI on a PUCCH of a main carrier; for the same UE, in each receiving period, the time-frequency resources for receiving the CSI are the same; aiming at different UE, in each receiving period, the time-frequency resources for receiving CSI are different; for each UE, in each receiving period, receiving the CSI time-frequency resource used for receiving the CSI on a PUCCH and receiving the CSI of one member carrier reported by the UE; and the CSI reported by the UE and received in at least two adjacent receiving periods is the CSI of different component carriers.

Description

Method and device for receiving CSI (channel State information) and reporting CSI

Technical Field

the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for receiving Channel State Information (CSI) and reporting CSI.

background

carrier Aggregation (CA) technology of a Long Term Evolution-Advanced (LTE-a) system can aggregate a plurality of continuous or discontinuous carriers under the same evolved node b (eNB) and serve User Equipment (UE) to provide a required rate. These aggregated carriers are also called Component Carriers (CCs). Each serving cell may be a component carrier, and serving cells (component carriers) under different enbs cannot be aggregated. In order to ensure that the UE in the LTE system can operate on each aggregated carrier, each carrier does not exceed 20MHz at maximum. However, a Physical Uplink Control Channel (PUCCH) under the CA is constrained by the protocol to only exist on the primary carrier, so when the UE uses the PUCCH to report CSI, CSI of different component carriers configured by the UE can only be reported from the PUCCH of the primary carrier. In addition, the PUCCH of the primary carrier needs to continuously support the CSI reported by the UE under non-CA, so that more uplink band resources are occupied by the PUCCH channel of the primary carrier, which may reduce available resources of a traffic channel (e.g., a physical uplink shared channel PUSCH), and directly affect the throughput of an uplink system.

the protocol specifies that when the UE configures more than 1 serving cell, the UE can report CSI of only one serving cell in a designated subframe, so that the UE may feed back CSI of multiple serving cells in the same subframe. For this protocol, a series of processing rules during collision are introduced, and details of the flow are many and will not be described here, which may be specifically referred to as 7.2.2 of the 36.213 protocol.

in the prior art, in order to enable a base station to comprehensively know the channel quality of each serving cell of a UE, different time-frequency parameters are configured for each serving cell of the same UE, so that the problem that CSI information of other serving cells of the same UE cannot be reported all the time due to collision is avoided. However, when a plurality of UEs need to report CSI of a plurality of serving cells, different time-frequency parameters are configured for different serving cells of different UEs according to the prior art, which will occupy more time-frequency resources on the PUCCH, thereby reducing available resources of a traffic channel and greatly affecting uplink throughput of the system.

disclosure of Invention

The embodiment of the invention provides a method and a device for receiving CSI and reporting the CSI, which are used for reducing PUCCH resources occupied by multi-carrier CSI under CA, improving uplink throughput of an LTE-A system and further improving system performance.

on the network side, a method for receiving CSI provided by the embodiment of the present invention includes:

for each UE, determining time-frequency resources used for receiving CSI on a Physical Uplink Control Channel (PUCCH) of a main carrier in each receiving period; for the same UE, in each receiving period, the time-frequency resources for receiving the CSI are the same; aiming at different UE, in each receiving period, the time-frequency resources for receiving CSI are different;

For each UE, in each receiving period, receiving CSI from a member carrier reported by the UE on a time-frequency resource used for receiving CSI on the PUCCH; and the CSI reported by the UE and received in at least two adjacent receiving periods is the CSI of different component carriers.

in the method provided by the embodiment of the invention, for each UE, time-frequency resources used for receiving CSI on a PUCCH of a main carrier in each receiving period are determined; for the same UE, in each receiving period, the time-frequency resources for receiving the CSI reported by the UE are the same; for different UE, in each receiving period, the time-frequency resources for receiving the CSI reported by different UE are different, so that the occupation of the CSI of the multi-carrier under CA on the PUCCH resources of the main carrier is reduced, the available resources of the service channel on the main carrier are increased, the user experience is effectively improved, and the quality of the network and the uplink throughput of the LTE-A system are improved. In addition, according to the method provided by the embodiment of the invention, for each UE, in each receiving period, the time-frequency resource for receiving the CSI on the PUCCH is used for receiving the CSI of one component carrier reported by the UE, and the CSI reported by the UE received in at least two adjacent receiving periods is the CSI of different component carriers, so that a situation that only the CSI of one component carrier of the same UE can be reported due to collision of the CSI of multiple component carriers of the same UE, but the CSI of other component carriers of the UE cannot be reported is avoided, and the base station can comprehensively acquire the CSI of the multiple component carriers of the same UE.

That is to say, the method provided in the embodiment of the present invention, for each UE, reduces occupation of PUCCH resources of a main carrier on the premise of ensuring that CSI of each component carrier reported by the UE can be received, improves uplink throughput of the LTE-a system, and further improves system performance.

Preferably, for each UE, determining a time-frequency resource for receiving CSI on a physical uplink control channel PUCCH of a primary carrier specifically includes:

for each UE:

Determining a time domain resource for receiving the CSI reported by the UE on a PUCCH of a main carrier in each receiving period according to a period parameter Npd and an offset parameter NOFFSET, CQI which are configured for each member carrier of the UE and reported by the CSI; the periodic parameters Npd of the CSI reports configured for each component carrier of the UE are the same, and the offset parameters NOFFSET of the CSI reports configured for each component carrier of the UE are the same, CQI is the same;

determining a frequency domain Resource used for receiving the CSI reported by the UE on the PUCCH of the main carrier in each receiving period according to a frequency domain parameter cqi-PUCCH-Resource Index configured for the CSI reported by each member carrier of the UE; wherein, the frequency domain parameters cqi-PUCCH-Resource Index configured for each component carrier of the UE are the same.

preferably, for each UE, in each receiving period, before receiving the CSI of one component carrier reported by the UE on the time-frequency resource used for receiving the CSI on the PUCCH, the method further includes: for each UE, determining a CSI feedback type for each component carrier of the UE, and informing the UE; wherein in each component carrier of the UE, the CSI feedback type of one component carrier has the highest priority;

for each UE, in each receiving period, receiving CSI of a component carrier reported by the UE on a time-frequency resource used for receiving CSI on the PUCCH, specifically including:

and for each UE, in each receiving period, receiving the CSI of one member carrier reported by the UE according to the CSI feedback type of each member carrier on the PUCCH by using the time-frequency resource for receiving the CSI.

Preferably, for each UE, the CSI feedback type of at least one component carrier of the UE is periodically adjusted, so that the component carrier with the highest priority of the CSI feedback type is the component carrier with the highest priority of the CSI feedback type in the non-last period, and the UE is notified.

Correspondingly, on the UE side, a method for reporting CSI provided in the embodiment of the present invention includes:

The method comprises the steps that UE determines time-frequency resources used for reporting CSI on a Physical Uplink Control Channel (PUCCH) of a main carrier in each reporting period, wherein the time-frequency resources used for reporting the CSI are the same in each reporting period;

The UE reports the CSI of one member carrier of the UE on a time-frequency resource used for reporting the CSI on the PUCCH in each reporting period; and the CSI reported in at least two adjacent reporting periods is the CSI of different component carriers.

therefore, on the premise that the same UE can report the CSI of each component carrier of the UE, the occupation of PUCCH resources of the main carrier is reduced, the uplink throughput of the LTE-A system is improved, and the system performance is improved.

Preferably, the determining, by the UE, a time-frequency resource used for reporting the CSI on a physical uplink control channel, PUCCH, of the primary carrier in each reporting period specifically includes:

the UE determines a time domain resource for reporting the CSI on a PUCCH of a main carrier in each reporting period according to a period parameter Npd and an offset parameter NOFFSET, CQI which are configured for each member carrier of the UE by a base station and reported by the CSI; the periodic parameters Npd of the CSI report configured for each member carrier of the UE by the base station are the same, and the offset parameters NOFFSET of the CSI report configured for each member carrier of the UE by the base station are the same;

the UE determines a frequency domain Resource for reporting the CSI on the PUCCH of the main carrier in each reporting period according to a frequency domain parameter cqi-PUCCH-Resource Index configured by the base station for each member carrier of the UE; and the frequency domain parameters cqi-PUCCH-Resource Index reported by the CSI configured for each member carrier of the UE by the base station are the same.

Preferably, in each reporting period, before reporting the CSI of a component carrier of the UE on the time-frequency resource used for reporting the CSI on the PUCCH, the method further includes: the UE acquires a CSI feedback type determined by a base station for each member carrier of the UE; wherein, in each component carrier of the UE, the priority of the CSI feedback type of one component carrier is the highest;

The UE reports the CSI of a component carrier of the UE on the time-frequency resource used for reporting the CSI on the PUCCH in each reporting period, and specifically includes:

and the UE reports the CSI of one member carrier according to the CSI feedback type of each member carrier on the PUCCH in each reporting period.

preferably, the UE periodically obtains the CSI feedback type of each component carrier after the base station adjusts the CSI feedback type of at least one component carrier of the UE, so that the component carrier with the highest priority of the CSI feedback type is the component carrier with the highest priority of the CSI feedback type in the non-last period.

on the network side, an apparatus for receiving CSI provided in an embodiment of the present invention includes:

a time-frequency resource determining unit, configured to determine, for each UE, a time-frequency resource used for receiving CSI on a physical uplink control channel PUCCH of a primary carrier in each reception period; for the same UE, in each receiving period, the time-frequency resources for receiving the CSI are the same; aiming at different UE, in each receiving period, the time-frequency resources for receiving CSI are different;

a CSI receiving unit, configured to receive, for each UE, in each receiving period, a CSI for a component carrier reported by the UE on a time-frequency resource used for receiving CSI on the PUCCH; and the CSI reported by the UE and received in at least two adjacent receiving periods is the CSI of different component carriers.

Preferably, the time-frequency resource determining unit is specifically configured to:

for each UE:

Preferably, for each UE, in each receiving period, before the time-frequency resource used for receiving CSI on the PUCCH receives CSI of one component carrier reported by the UE, the time-frequency resource determining unit is further configured to: for each UE, determining a CSI feedback type for each component carrier of the UE, and informing the UE; wherein in each component carrier of the UE, the CSI feedback type of one component carrier has the highest priority;

The CSI receiving unit is specifically configured to:

Preferably, the time-frequency resource determining unit is further configured to:

and aiming at each UE, periodically adjusting the CSI feedback type of at least one member carrier of the UE, so that the member carrier with the highest priority of the CSI feedback type is the member carrier with the highest priority of the CSI feedback type in a non-last period, and informing the UE.

on the UE side, an apparatus for reporting CSI provided in an embodiment of the present invention includes:

A time-frequency resource determining unit, configured to determine a time-frequency resource used for reporting the CSI on a physical uplink control channel PUCCH of the main carrier in each reporting period, where the time-frequency resources used for reporting the CSI are the same in each reporting period;

a CSI reporting unit, configured to report, in each reporting period, a CSI of a component carrier of the apparatus on a time-frequency resource used for reporting CSI on the PUCCH; and the CSI reported in at least two adjacent reporting periods is the CSI of different component carriers.

determining a time domain resource for reporting CSI on a PUCCH of a main carrier in each reporting period according to a period parameter Npd, an offset parameter NOFFSET and CQI which are configured by a base station for each member carrier of the device and reported by the CSI; the periodic parameters Npd of CSI reporting configured by the base station for each component carrier of the device are the same, and the offset parameters NOFFSET of CSI reporting configured by the base station for each component carrier of the device are the same, wherein CQI is the same;

determining a frequency domain Resource used for reporting the CSI on the PUCCH of the main carrier in each reporting period according to a frequency domain parameter cqi-PUCCH-Resource Index configured by the base station for each member carrier of the device; the frequency domain parameters cqi-PUCCH-Resource Index reported by the CSI configured for each component carrier of the device by the base station are the same.

Preferably, in each reporting period, before reporting the CSI of a component carrier of the device on the time-frequency resource used for reporting the CSI on the PUCCH by the CSI reporting unit, the time-frequency resource determining unit is further configured to: acquiring a CSI feedback type determined by a base station for each member carrier of the device; wherein, in each component carrier of the UE, the priority of the CSI feedback type of one component carrier is the highest;

the CSI reporting unit is specifically configured to:

And in each reporting period, reporting the CSI of one member carrier according to the CSI feedback type of each member carrier on the PUCCH for the time-frequency resource used for reporting the CSI.

the CSI feedback type of each component carrier after the base station adjusts the CSI feedback type of at least one component carrier of the device is periodically acquired, so that the component carrier with the highest priority of the CSI feedback type is not the component carrier with the highest priority of the CSI feedback type in the last period.

Drawings

Fig. 1 is a flowchart illustrating a method for receiving CSI according to an embodiment of the present invention;

Fig. 2 is a flowchart illustrating a method for reporting CSI according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an apparatus for receiving CSI according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an apparatus for reporting CSI according to an embodiment of the present invention.

Detailed Description

the embodiment of the invention provides a method for distributing time-frequency resources to each member carrier of UE by a base station under CA, thereby solving the problems that the CSI of multiple carriers occupies more PUCCH resources of a main carrier and causes less resources of service information of the main carrier. The method provided by the embodiment of the invention is explained in detail below from different network entity sides respectively.

On the network side, referring to fig. 1, an embodiment of the present invention provides a method for receiving CSI, including:

S101, determining time-frequency resources used for receiving CSI on a PUCCH of a main carrier in each receiving period aiming at each UE; for the same UE, in each receiving period, the time-frequency resources for receiving the CSI are the same; aiming at different UE, in each receiving period, the time-frequency resources for receiving CSI are different;

Here, the time-frequency resource includes a time-domain resource and a frequency-domain resource.

for the same UE, in each receiving period, the time-frequency resources used for receiving the CSI are the same, that is, in each receiving period, the time-domain resources used for receiving the CSI of the component carrier reported by the UE are the same, and the frequency-domain resources used for receiving the CSI of the component carrier reported by the UE are also the same.

the time domain Resource may be, for example, a subframe in which CSI is transmitted, and the frequency domain Resource may be, for example, a Physical Resource Block (PRB) or a Resource Element (RE) in which CSI is transmitted.

For different UEs, in each receiving period, the time-frequency resources used for receiving CSI are different, which may include the following three cases:

(1) In each receiving period, the time domain resources for receiving the CSI reported by different UE are the same, and the frequency domain resources for receiving the CSI reported by different UE are different;

(2) in each receiving period, the time domain resources for receiving the CSI reported by different UE are different, and the frequency domain resources for receiving the CSI reported by different UE are the same;

(3) In each receiving period, the time domain resources for receiving the CSI reported by different UEs are different, and the frequency domain resources for receiving the CSI reported by different UEs are also different.

S102, aiming at each UE, in each receiving period, receiving the CSI of a member carrier reported by the UE on the time-frequency resource used for receiving the CSI on the PUCCH; and the CSI reported by the UE and received in at least two adjacent receiving periods is the CSI of different component carriers.

specifically, in step S102, for each UE, in each receiving period, the time-frequency resource used for receiving the CSI on the PUCCH receives the CSI of one component carrier reported by the UE, that is, for each UE, in each receiving period, the time-frequency resource used for receiving the CSI reported by the UE on the PUCCH receives the CSI of one component carrier reported by the UE.

the CSI reported by the UE received in the at least two adjacent receiving periods is CSI of different component carriers, may be CSI reported by the UE received in the two adjacent receiving periods is CSI of different component carriers, and may also be CSI reported by the UE received in more than two adjacent receiving periods is CSI of different component carriers. For example, when the UE corresponds to two component carriers, the CSI reported by the UE received in two adjacent receiving periods may be CSI of different component carriers, and when the UE corresponds to three component carriers, the CSI reported by the UE received in three adjacent receiving periods may be CSI of different component carriers.

The main body of the steps S101 and S102 may be a base station, for example.

Taking one UE as an example: assume that the UE corresponds to two component carriers: the component carrier a and the component carrier B are set to have each receiving period of 40ms, and it is specified that the CSI reported by the UE is received at the subframe 2 and the PRB1 of the first radio frame, then the CSI of the component carrier a reported by the UE is received at the subframe 2 and the PRB1 of the first radio frame in the first receiving period, the CSI of the component carrier B reported by the UE is received at the subframe 2 and the PRB1 of the first radio frame in the second receiving period, the CSI of the component carrier a reported by the UE is received at the subframe 2 and the PRB1 of the first radio frame in the third receiving period, and the CSI of the component carrier B reported by the UE is received at the subframe 2 and the PRB1 of the first radio frame in the fourth receiving period, and so on. Therefore, in different periods, the time-frequency resource positions for receiving each CSI reported by the UE are the same, and in two adjacent periods, the CSI of different component carriers reported by the UE is received.

Therefore, by the method provided by the embodiment of the invention, on the premise of ensuring that the CSI of each member carrier reported by the UE can be received, the occupation of PUCCH resources of the main carrier is reduced, the uplink throughput of the LTE-A system is improved, and the system performance is further improved.

Of course, the embodiment of the present invention is not limited to the case where the CSI reported by the UE received in at least two adjacent receiving periods is CSI of different component carriers, and may also be the CSI reported by the UE received in at least two adjacent receiving periods is CSI of the same component carrier, and the CSI reported by the UE received in the next at least two adjacent receiving periods is CSI of another component carrier. For example, the UE corresponds to a component carrier a and a component carrier B, receives CSI of the component carrier a reported by the UE in a first receiving period and a second receiving period, receives CSI of the component carrier B reported by the UE in a third receiving period and a fourth receiving period, and so on.

Preferably, for each UE, the time-frequency resource for receiving the CSI of each component carrier reported by the UE on the PUCCH of the primary carrier may be determined as follows:

For each UE:

determining a time domain resource for receiving the CSI of the member carrier reported by the UE on a PUCCH of a main carrier in each receiving period according to a period parameter Npd and an offset parameter NOFFSET, CQI which are configured for each member carrier of the UE and reported by the CSI; the periodic parameters Npd of the CSI reports configured for each component carrier of the UE are the same, and the offset parameters NOFFSET of the CSI reports configured for each component carrier of the UE are the same, CQI is the same;

Determining a frequency domain Resource used for receiving the CSI of each member carrier reported by the UE on the PUCCH of the main carrier in each receiving period according to a frequency domain parameter cqi-PUCCH-Resource Index configured for the CSI to be reported by each member carrier of the UE; wherein, the frequency domain parameters cqi-PUCCH-Resource Index configured for each component carrier of the UE are the same.

preferably, the time length corresponding to the receiving period is the same as the time length corresponding to Npd. That is, the period for reporting the CSI by the UE is consistent with the period for receiving the CSI reported by the UE by the base station.

Preferably, for each UE, in each receiving period, before the time-frequency resource on the PUCCH for receiving the CSI reported by the UE receives the CSI of one component carrier reported by the UE, the method further includes: for each UE, determining a CSI feedback type for each component carrier of the UE, and informing the UE; wherein, in each component carrier of the UE, the CSI feedback type of one component carrier has the highest priority.

that is, the base station needs to determine not only the time-frequency resource for receiving the CSI reported by the UE on the PUCCH in each receiving period, but also determine, for each UE, the CSI feedback type for each component carrier of the UE, so that the priority of the CSI feedback type of one component carrier is highest in each component carrier of the UE, and thus the UE can determine which component carrier CSI is reported in the period according to the priority of the CSI feedback type of each component carrier in each reporting period.

The protocol defines several CSI feedback types (refer to the 36.213 protocol specifically), there are ten CSI feedback types defined by the current protocol, which are type1, type1a, type2, type2a, type2b, type2c, type3, type4, type5, and type6, respectively, and different types represent different CSI measurement contents. In addition, reporting priorities of CSI of different feedback types are also different, for example, the reporting priority of any one of type3, type5, type6 or type2a is higher than the reporting priority of any one of type1, type1a, type2, type2b, type2c or type 4. According to a processing rule specified by a protocol when the UE reports the CSI of a plurality of component carriers in the same subframe and generates collision, only the CSI of the component carrier with the highest priority of the CSI feedback type can be reported.

The UE determines the component carrier with the highest priority of the CSI feedback type according to the CSI of the different component carriers reported by the CSI feedback type of each component carrier, that is, the UE determines the component carrier with the highest priority of the CSI feedback type according to the CSI feedback type of each component carrier, and then only reports the CSI of the component carrier with the highest priority of the CSI feedback type in each reporting period.

preferably, the period for adjusting the CSI feedback type of the component carrier of the same UE is the same as the period for receiving the CSI reported by the same UE, so that the CSI reported by the same UE and received in at least two adjacent receiving periods can be the CSI of different component carriers.

Of course, the period for adjusting the CSI feedback type of the component carrier of the same UE may also be different from the period for receiving the CSI reported by the same UE, for example, the period for adjusting the CSI feedback type of the component carrier of the same UE is set to be an integer multiple of the period for receiving the CSI reported by the same UE, so that the CSI reported by the UE received in at least two adjacent receiving periods in the foregoing is the CSI of the same component carrier, and the CSI reported by the UE received in at least two adjacent receiving periods in the next is the CSI of another component carrier. In addition, it is also possible to set the period for adjusting the CSI feedback type of the component carrier of the same UE to be not an integer multiple of the period for receiving the CSI reported by the same UE, which is not limited in this embodiment of the present invention.

In summary, no matter whether the period for adjusting the CSI feedback types of the component carriers of the same UE is set to be the same as or different from the period for receiving the CSI reported by the same UE, the base station can comprehensively know the channel state information of each component carrier of the same UE.

corresponding to the network side, on the UE side, referring to fig. 2, a method for reporting CSI provided in an embodiment of the present invention includes:

S201, UE determines time-frequency resources used for reporting CSI on a PUCCH of a main carrier in each reporting period, wherein the time-frequency resources used for reporting the CSI are the same in each reporting period;

here, the reporting period corresponding to the UE is the same as the receiving period corresponding to the network side. The UE determines a time-frequency resource used for reporting CSI on the PUCCH of the primary carrier in each reporting period, that is, the UE determines a time-frequency resource used for reporting CSI of the component carrier of the UE on the PUCCH of the primary carrier in each reporting period.

S202, reporting the CSI of a member carrier of the UE by the UE on a time-frequency resource used for reporting the CSI on the PUCCH in each reporting period; and the CSI reported in at least two adjacent reporting periods is the CSI of different component carriers.

here, the time frequency resource includes a time domain resource and a frequency domain resource. In step S202, the UE reports the CSI of one component carrier of the UE on the PUCCH in each reporting period by using the time-frequency resource for reporting the CSI on the PUCCH, that is, in each reporting period, the UE reports the CSI of one component carrier of the UE by using the time-frequency resource for reporting the CSI on the PUCCH.

according to the method, the UE can report the CSI of different component carriers of the UE at the time frequency resource position used for the UE to report the CSI on the PUCCH in at least two adjacent reporting periods, so that the UE can report the CSI of each component carrier to the base station.

preferably, the UE may determine the time-frequency resource for reporting the CSI on the physical uplink control channel PUCCH of the primary carrier in each reporting period by:

the UE determines a time domain resource used for reporting the CSI of the member carrier of the UE on a PUCCH of a main carrier in each reporting period according to a period parameter Npd and an offset parameter NOFFSET, CQI which are configured by a base station for each member carrier of the UE; the periodic parameters Npd of the CSI report configured for each member carrier of the UE by the base station are the same, and the offset parameters NOFFSET of the CSI report configured for each member carrier of the UE by the base station are the same;

The UE determines the frequency domain Resource used for reporting the CSI of the member carrier of the UE on the PUCCH of the main carrier in each reporting period according to the frequency domain parameter cqi-PUCCH-Resource Index configured by the base station for the CSI reported by each member carrier of the UE; and the frequency domain parameters cqi-PUCCH-Resource Index reported by the CSI configured for each member carrier of the UE by the base station are the same.

therefore, the UE can report the CSI of one component carrier in each reporting period at the designated subframe and the PUCCH frequency domain position indicated by cqi-PUCCH-Resource Index, and preferably, the CSI reported in at least two adjacent reporting periods is the CSI of different component carriers, so that the UE can report the CSI of each component carrier to the base station.

Preferably, in each reporting period, before reporting the CSI of one component carrier of the UE on the time-frequency resource used by the PUCCH of the primary carrier for reporting the CSI by the UE, the method further includes: the method comprises the steps that UE obtains a CSI feedback type determined by a base station for each member carrier of the UE; wherein, in each component carrier of the UE, the priority of the CSI feedback type of one component carrier is the highest;

in each reporting period, the UE reports the CSI of one component carrier of the UE on a time-frequency resource used for reporting the CSI on a PUCCH of a main carrier, and the reporting period specifically includes:

And in each reporting period, the UE reports the CSI of one member carrier on the PUCCH of the main carrier according to the CSI feedback type of each member carrier.

that is, in each reporting period, the UE determines the component carrier with the highest priority of the CSI feedback type according to the CSI feedback type of each component carrier, and then, in the reporting period, the UE reports the CSI of the component carrier with the highest priority of the CSI feedback type on the PUCCH of the main carrier at the time-frequency resource location where the UE reports the CSI.

Preferably, the period of the CSI feedback type of each component carrier, which is obtained by the UE after the base station adjusts the CSI feedback type of at least one component carrier of the UE, is the same as the period of reporting CSI by the UE, so that the CSI reported in at least two adjacent reporting periods can be the CSI of different component carriers. For example, the UE corresponds to a component carrier a and a component carrier B, the period of the CSI feedback type of each component carrier after the UE obtains that the base station adjusts the CSI feedback type of at least one component carrier of the UE and the period of reporting the CSI by the UE are both 40ms, in the first reporting period, the CSI reporting priority of the component carrier a is higher than the CSI reporting priority of the component carrier B, the UE reports the CSI of the component carrier a on a time-frequency resource specified in the reporting period, in the second reporting period, the CSI reporting priority of the component carrier B is higher than the CSI reporting priority of the component carrier a, and the UE reports the CSI of the component carrier B on a time-frequency resource specified in the reporting period, and so on.

Of course, the period of the CSI feedback type of each component carrier, which is obtained by the UE and adjusted by the base station for the CSI feedback type of the at least one component carrier of the UE, may also be different from the period of the CSI reported by the UE, for example, the period of the CSI feedback type of each component carrier, which is obtained by the UE and adjusted by the base station for the CSI feedback type of the at least one component carrier of the UE, is an integer multiple of the period of the CSI reported by the UE. For example, the UE corresponds to a component carrier a and a component carrier B, the period of the CSI feedback type of each component carrier after the UE obtains that the base station adjusts the CSI feedback type of at least one component carrier of the UE is 80ms, the period of reporting the CSI by the UE is 40ms, the CSI reporting priority of the component carrier a is higher than the CSI reporting priority of the component carrier B in the first reporting period and the second reporting period, and the UE reports the CSI of the component carrier a in the specified time-frequency resources in the first reporting period and the second reporting period; in the third reporting period and the fourth reporting period, the CSI reporting priority of the component carrier B is higher than that of the component carrier a, and then the UE reports the CSI of the component carrier B in the third reporting period and the fourth reporting period on the designated time-frequency resources, and so on.

in summary, no matter whether the period of the CSI feedback type of each component carrier, which is obtained by the UE and adjusted by the base station, is the same as or different from the period of reporting the CSI by the UE, reporting the CSI of each component carrier to the base station by the UE can be achieved, so that the base station can comprehensively know the channel state information of each component carrier of the UE.

In order to make the advantages of the embodiments of the present invention more prominent, specific examples are given below.

take the main carrier bandwidth as 20MHz, total 100 PRBs, 5ms downlink-uplink switching point period DSUDD as an example. It is assumed that each UE configures two component carriers (serving cells), and the two component carriers of the same UE are configured with the same time-frequency resource. Taking UE1 as an example, UE1 configures two component carriers, namely component carrier 0 and component carrier 1, and Npd of component carrier 0 is configured to be 40ms, NOFFSET, CQI is configured to be 1, CQI-PUCCH-Resource Index is configured to be 0, and CSI feedback type is configured to be type 1; the Npd of the component carrier 1 is configured to be 40ms, NOFFSET, CQI is configured to be 1, CQI-PUCCH-Resource Index is configured to be 0, and the CSI feedback type is configured to be type2 a. Configuring according to the idea, configuring the same time-frequency resources for two component carriers of the same UE, if 400 UEs configured with the two component carriers need to report CSI on a PUCCH of a main carrier, and the 400 UEs are all configured with a reporting period Npd of 40ms, allocating time-domain resources for the 400 UEs first, and allocating time-domain resources to 8 UEs configured with the two component carriers within 40ms in total, that is, 8 uplink subframes are available for the 8 UEs to report CSI of one component carrier respectively; secondly, frequency domain resources are allocated, and 50 frequency domain parameters cqi-PUCCH-Resource Index are allocated to each uplink subframe. However, the PUCCH channel of one PRB can only carry 12 cqi-PUCCH-Resource indexes, and therefore, 5 PRBs are required to carry CSI resources reported by the 400 UEs. That is, only 5% of the resources in the uplink channel of the primary carrier cannot be used for transmitting traffic.

in addition, in this embodiment, for each UE of the 400 UEs, the base station periodically adjusts the CSI feedback type of at least one component carrier of the UE, so that the component carrier with the highest priority of the CSI feedback type is the component carrier with the highest priority of the CSI feedback type in the non-last period, and notifies the UE. For example, the base station adjusts the CSI feedback types of two component carriers of each UE with 40ms as a period, taking UE1 as an example, at an initial time, the CSI feedback type configured by the base station for component carrier 0 is type1, and the CSI feedback type configured by the base station for component carrier 1 is type2a, because the reporting priority of the CSI feedback type of type1 is lower than that of the CSI feedback type of type2a, the UE1 reports the CSI of the component carrier 1 on the corresponding time-frequency resource in the period; in the next period, the base station adjusts the CSI feedback types of the two component carriers of the UE1, so that the reporting priority of the CSI feedback type of the component carrier 0 is higher than that of the CSI feedback type of the component carrier 1, and thus, the UE1 reports the CSI of the component carrier 0 on the corresponding time-frequency resource in the period, and so on, the UE1 can report the CSI of the component carrier 0 and the CSI of the component carrier 1 in turn. For other UEs, a similar strategy for adjusting the CSI feedback type is adopted. Therefore, for each UE, the CSI of the two component carriers of the UE can be reported to the base station, and the problem that the CSI of only one component carrier of the same UE can be reported and the CSI of other component carriers of the UE cannot be reported due to mutual collision of the CSI of the multiple component carriers of the same UE is solved.

or take the main carrier bandwidth as 20MHz, total 100 PRBs, 5ms downlink-uplink switching point period DSUDD as an example. Assuming that each UE is configured with two component carriers (serving cells), if the prior art is adopted, the two component carriers of the same UE are configured with different time-frequency resources. Taking UE1 as an example, UE1 configures two component carriers, namely component carrier 0 and component carrier 1, and Npd of component carrier 0 is configured to be 40ms, NOFFSET, CQI is configured to be 1, CQI-PUCCH-Resource Index is configured to be 0; the Npd of the component carrier 1 is configured as 40ms, NOFFSET, and the CQI is configured as 3, CQI-PUCCH-Resource Index is configured as 0. Configuring according to the idea, configuring different time-frequency resources for two component carriers of the same UE, if 400 UEs configured with the two component carriers need to report CSI on a PUCCH of a main carrier, and the 400 UEs are all configured with a reporting period Npd of 40ms, allocating time-domain resources for the 400 UEs first, and allocating time-domain resources to 4 UEs configured with the two component carriers within 40ms in total, that is, 8 uplink subframes are available for the 4 UEs to report CSI of the two component carriers respectively; secondly, frequency domain resources are allocated, and 100 frequency domain parameters cqi-PUCCH-Resource Index are allocated to each uplink subframe. However, the PUCCH channel of one PRB can only carry 12 cqi-PUCCH-Resource indexes, so that 9 PRBs are required to carry CSI resources reported by the 400 UEs. That is, in the uplink channel of the primary carrier, 9% of the resources are not available for transmitting traffic.

by adopting the method provided by the embodiment of the invention, only 5% of resources can not be used for transmitting services in the uplink channel of the main carrier on the premise of ensuring that the CSI of each member carrier of each UE can be reported, so that compared with the prior art, nearly half of resource waste is saved, and the uplink throughput of an LTE-A system is improved.

Corresponding to the methods for receiving and reporting the CSI, the embodiment of the invention respectively provides a device for receiving the CSI and a device for reporting the CSI.

On the network side, referring to fig. 3, an apparatus for receiving CSI provided in an embodiment of the present invention includes:

A time-frequency resource determining unit 11, configured to determine, for each UE, a time-frequency resource used for receiving CSI on a PUCCH of a primary carrier in each reception period; for the same UE, in each receiving period, the time-frequency resources for receiving the CSI are the same; aiming at different UE, in each receiving period, the time-frequency resources for receiving CSI are different;

A CSI receiving unit 12, configured to receive, for each UE, in each receiving period, a CSI of a component carrier reported by the UE on a time-frequency resource used for receiving CSI on the PUCCH; and the CSI reported by the UE and received in at least two adjacent receiving periods is the CSI of different component carriers.

The CSI receiving device may be, for example, a base station.

Preferably, the time-frequency resource determining unit 11 is specifically configured to:

For each UE:

preferably, for each UE, in each receiving period, before the time-frequency resource used for receiving CSI on the PUCCH and receiving CSI of one component carrier reported by the UE, the time-frequency resource determining unit 11 is further configured to: for each UE, determining a CSI feedback type for each component carrier of the UE, and informing the UE; wherein in each component carrier of the UE, the CSI feedback type of one component carrier has the highest priority;

the CSI receiving unit 12 is specifically configured to:

Preferably, the time-frequency resource determining unit 11 is further configured to:

correspondingly, on the UE side, referring to fig. 4, an apparatus for reporting CSI provided in an embodiment of the present invention includes:

a time-frequency resource determining unit 21, configured to determine a time-frequency resource used for reporting the CSI on a PUCCH of the main carrier in each reporting period, where the time-frequency resources used for reporting the CSI are the same in each reporting period;

A CSI reporting unit 22, configured to report, in each reporting period, a CSI of a component carrier of the apparatus on a time-frequency resource used for reporting CSI on the PUCCH; and the CSI reported in at least two adjacent reporting periods is the CSI of different component carriers.

the device for reporting CSI may be, for example, a UE.

Preferably, the time-frequency resource determining unit 21 is specifically configured to:

Preferably, in each reporting period, before the CSI reporting unit 22 reports the time-frequency resource used for reporting the CSI on the PUCCH and reports the CSI of one component carrier of the device, the time-frequency resource determining unit 21 is further configured to: acquiring a CSI feedback type determined by a base station for each member carrier of the device; wherein, in each component carrier of the UE, the priority of the CSI feedback type of one component carrier is the highest;

The CSI reporting unit 22 is specifically configured to:

preferably, the time-frequency resource determining unit 22 is further configured to:

In the embodiment of the present invention, the functional units may be implemented by a specific physical device such as a hardware processor.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of receiving channel state information, CSI, the method comprising:

for each User Equipment (UE), determining a time-frequency resource for receiving CSI on a Physical Uplink Control Channel (PUCCH) of a main carrier in each receiving period; for the same UE, in each receiving period, the time-frequency resources for receiving the CSI are the same; aiming at different UE, in each receiving period, the time-frequency resources for receiving CSI are different;

2. the method according to claim 1, wherein determining, for each UE, a time-frequency resource for receiving CSI on a physical uplink control channel, PUCCH, of a primary carrier in each reception period comprises:

for each UE:

Determining a frequency domain resource for receiving the CSI reported by the UE on a PUCCH of a main carrier in each receiving period according to a frequency domain parameter configured for the CSI report for each member carrier of the UE; wherein, the frequency domain parameters configured for each component carrier of the UE are the same.

3. the method of claim 1, wherein for each UE, before receiving CSI for a component carrier reported by the UE on a time-frequency resource on the PUCCH for receiving CSI in each reception period, the method further comprises: for each UE, determining a CSI feedback type for each component carrier of the UE, and informing the UE; wherein in each component carrier of the UE, the CSI feedback type of one component carrier has the highest priority;

4. The method of claim 3, further comprising:

5. a method for reporting CSI, the method comprising:

the method comprises the steps that User Equipment (UE) determines time-frequency resources used for reporting CSI on a Physical Uplink Control Channel (PUCCH) of a main carrier in each reporting period, wherein the time-frequency resources used for reporting the CSI are the same in each reporting period;

6. the method of claim 5, wherein determining, by the UE, the time-frequency resource for reporting the CSI on the physical uplink control channel, PUCCH, of the primary carrier in each reporting period specifically includes:

the UE determines a time domain resource for reporting the CSI on a PUCCH of a main carrier in each reporting period according to a period parameter Npd, an offset parameter NOFFSET and a CQI which are configured for each member carrier of the UE by a base station; the periodic parameters Npd of the CSI report configured for each member carrier of the UE by the base station are the same, and the offset parameters NOFFSET of the CSI report configured for each member carrier of the UE by the base station are the same;

the UE determines a frequency domain resource for reporting the CSI on a PUCCH of a main carrier in each reporting period according to the frequency domain parameter configured by the base station for reporting the CSI for each member carrier of the UE; and the frequency domain parameters reported by the CSI configured for each member carrier of the UE by the base station are the same.

7. The method of claim 5, wherein the UE reports CSI on the PUCCH on a time-frequency resource for reporting CSI in each reporting period, and wherein before reporting CSI for a component carrier of the UE, the method further comprises: the UE acquires a CSI feedback type determined by a base station for each member carrier of the UE; wherein, in each component carrier of the UE, the priority of the CSI feedback type of one component carrier is the highest;

8. The method of claim 7, further comprising:

the UE periodically acquires the CSI feedback type of each component carrier after the base station adjusts the CSI feedback type of at least one component carrier of the UE, so that the component carrier with the highest priority of the CSI feedback type is the component carrier with the highest priority of the CSI feedback type in a non-last period.

9. An apparatus for receiving channel state information, CSI, the apparatus comprising:

10. the apparatus according to claim 9, wherein the time-frequency resource determining unit is specifically configured to:

For each UE:

11. The apparatus of claim 9, wherein for each UE, before receiving the CSI of one component carrier reported by the UE on the PUCCH for each time-frequency resource used for receiving the CSI in each receive period, the time-frequency resource determining unit is further configured to: for each UE, determining a CSI feedback type for each component carrier of the UE, and informing the UE; wherein in each component carrier of the UE, the CSI feedback type of one component carrier has the highest priority;

The CSI receiving unit is specifically configured to:

12. The apparatus of claim 11, wherein the time-frequency resource determining unit is further configured to:

13. an apparatus for reporting Channel State Information (CSI), the apparatus comprising:

14. The apparatus according to claim 13, wherein the time-frequency resource determining unit is specifically configured to:

Determining a frequency domain resource for reporting the CSI on a PUCCH of a main carrier in each reporting period according to a frequency domain parameter configured by a base station for reporting the CSI for each member carrier of the device; the frequency domain parameters reported by the CSI configured for each component carrier of the device by the base station are the same.

15. The apparatus of claim 13, wherein the CSI reporting unit is further configured to, in each reporting period, before reporting the CSI of one component carrier of the apparatus on a time-frequency resource used for reporting the CSI on the PUCCH, the time-frequency resource determining unit is further configured to: acquiring a CSI feedback type determined by a base station for each member carrier of the device; wherein, in each component carrier of the UE, the priority of the CSI feedback type of one component carrier is the highest;

the CSI reporting unit is specifically configured to:

16. The apparatus of claim 15, wherein the time-frequency resource determining unit is further configured to: