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CN102201897A - Channel state information (CSI) processing method, device and system - Google Patents

Channel state information (CSI) processing method, device and system Download PDF

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Publication number
CN102201897A
CN102201897A CN201110111805XA CN201110111805A CN102201897A CN 102201897 A CN102201897 A CN 102201897A CN 201110111805X A CN201110111805X A CN 201110111805XA CN 201110111805 A CN201110111805 A CN 201110111805A CN 102201897 A CN102201897 A CN 102201897A
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csi
configuration signaling
power parameter
parameters corresponding
power
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CN102201897B (en
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陈艺戬
徐俊
李儒岳
孙云锋
张峻峰
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a channel state information (CSI) processing method, device and system. The method comprises the following steps: UE (User Equipment) receives high-layer configuration signaling, wherein the high-layer configuration signaling comprises a plurality of power parameters corresponding to rank information (RI); the UE performs channel measurement by using a received CSI-RS (Channel State Information-Reference Symbol) or CRS (Common Reference Signal); and the UE determines the CSI by using a channel measurement result and the power parameter and reports the CSI. By adopting the method, the device and the system, the system performance is enhanced and the computing accuracy of channel quality information is enhanced.

Description

Channel state information processing method, device and system
Technical Field
The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a system for processing Channel State Information (CSI).
Background
In the wireless communication technology, when a base station side (e.g., an evolved node B (eNodeB), referred to as eNB) transmits data using multiple antennas, a spatial multiplexing method may be adopted to increase a data transmission rate, that is, a transmitting end uses the same time-frequency resource to transmit different data at different antenna positions, and a receiving end (e.g., a User Equipment (UE)) also uses multiple antennas to receive the data. Under the condition of a Single User, resources of all antennas are distributed to the same User, the User independently occupies physical resources distributed to a base station side in a transmission interval, and the transmission mode is called Single User Multiple-input Multiple-output (SU-MIMO); in the case of Multiple users, space resources of different antennas are allocated to different users, and a user and at least one other user share physical resources allocated at a base station side in a transmission interval, where the sharing mode may be a space division Multiple access mode or a space division multiplexing mode, and this transmission mode is referred to as Multiple user Multiple-Input Multiple-output (MU-MIMO), where the physical resources allocated at the base station side refer to time-frequency resources. If the transmission system is to support both SU-MIMO and MU-MIMO, the eNB needs to provide the UE with data in both modes. When the UE is in the SU-MIMO mode or the MU-MIMO mode, the UE needs to know the Rank (Rank) used by the eNB for transmitting the MIMO data for the UE. In the SU-MIMO mode, resources of all antennas are allocated to the same user, and the number of layers used for transmitting MIMO data is equal to the rank used by the eNB for transmitting MIMO data; in the MU-MIMO mode, the number of layers used for transmission of a corresponding user is less than the total number of layers used by the eNB for transmitting MIMO data, and if the SU-MIMO mode and the MU-MIMO mode are to be switched, the eNB needs to notify the UE of different control data in different transmission modes.
In a Long Term Evolution system (LTE), Information (CSI: Channel State Information) reflecting a downlink physical Channel State includes 3 parts: channel Quality Indication (CQI), Precoding Matrix Indication (PMI), and Rank Indication (RI).
The CQI is an index for measuring the quality of the downlink channel. In the 36-213 protocol, CQIs are represented by integer values of 0 to 15, which respectively represent different CQI levels, and different CQIs correspond to respective modulation schemes and coding rates (MCSs), and in 16 cases, they can be represented by using 4-bit information, as shown in table 1:
TABLE 1 relationship between CQI index and MCS
Figure BDA0000058699520000021
The CQI is an important indicator for measuring transmission, and is characterized by channel quality when MIMO closed-loop precoding is performed in a manner specified by a protocol when an RI value is used as the number of transmission layers and a codeword indicated by a reported PMI is used as precoding. Therefore, CQI cannot exist independently of RI and PMI.
In the related art, when the UE determines the CSI, the CSI accuracy is low due to the adoption of the parameter with uniform offset parameters.
Disclosure of Invention
The present invention is directed to a method, an apparatus, and a system for processing CSI status information, so as to solve at least the problem of low CSI accuracy.
According to an aspect of the present invention, there is provided a CSI processing method, including: the UE receives a high-level configuration signaling, wherein the high-level configuration signaling comprises a plurality of power parameters corresponding to RI; the UE performs channel measurement using a received channel state information-reference symbol (CSI-RS) or Common Reference Signal (CRS); and the UE determines the CSI by using the channel measurement result and the power parameter and reports the CSI.
Preferably, the power parameter is a ratio p-C of an EPRE of a PDSCH and an EPRE of a CSI-RS.
Preferably, the power parameter corresponding to the RI decreases as the RI increases.
Preferably, RI is a natural number between 1 and N, N being 2, 4 or 8.
Preferably, the values or ranges of values of the power parameters corresponding to one or more RIs are the same.
Preferably, the ratio RI-1,
Figure BDA0000058699520000022
RI＝2，
Figure BDA0000058699520000023
RI is 3 and 4, respectively,
Figure BDA0000058699520000024
wherein a1, a2 and a3 are real numbers and satisfy a1 ≧ a2 ≧ a 3.
Preferably, the ratio RI-1,
Figure BDA0000058699520000031
RI＝2，RI is 3 and 4, respectively,
Figure BDA0000058699520000033
RI is 5 to 8, and (ii) is,
Figure BDA0000058699520000034
wherein b1, b2, b3 and b4 are real numbers, and b1 is more than or equal to b2 and more than or equal to b3 and more than or equal to b 4.
According to another aspect of the present invention, there is also provided a CSI processing method, including: the base station configures a plurality of power parameters corresponding to RI in a high-level configuration signaling; the base station sends a high-level configuration signaling carrying the power parameter to the UE; the base station receives CSI from the UE determined using the result of the channel measurement and the power parameter.
Preferably, the power parameter is a ratio p-C of an EPRE of the downlink PDSCH to an EPRE of the CSI-RS.
Preferably, the configuring, by the base station, a plurality of power parameters corresponding to the RI in the higher layer configuration signaling includes: the base station configuration and the power parameter corresponding to the RI decrease as the RI increases.
Preferably, RI is a natural number between 1 and N, N being 2, 4 or 8.
Preferably, the values or ranges of values of the power parameters corresponding to one or more RIs are the same.
According to still another aspect of the present invention, there is also provided a CSI processing apparatus, applied to a UE, including: a first receiving module, configured to receive a high-level configuration signaling, where the high-level configuration signaling includes a plurality of power parameters corresponding to rank information RI; a measurement module, configured to perform channel measurement using the received CSI-RS or CRS; a determination module determining CSI using a result of the channel measurement and the power parameter; and the reporting module is used for reporting the CSI.
According to another aspect of the present invention, there is also provided a CSI processing apparatus, applied to a base station, including: a configuration module, configured to configure a plurality of power parameters corresponding to RI in a high-level configuration signaling; a sending module, configured to send a high-level configuration signaling carrying a power parameter to a user equipment UE; a second receiving module for receiving the CSI determined using the result of the channel measurement and the power parameter from the UE.
According to still another aspect of the present invention, there is also provided a CSI processing apparatus, including: a first CSI processing device for receiving a higher-layer configuration signaling, wherein the higher-layer configuration signaling comprises a plurality of power parameters corresponding to RI; performing channel measurement by using the received CSI-RS or CRS; determining CSI using the results of the channel measurements and the power parameter; a reporting module, configured to report CSI; the second CSI processing device is used for configuring a plurality of power parameters corresponding to RI in the high-level configuration signaling; sending a high-level configuration signaling carrying power parameters to User Equipment (UE); receiving CSI from the UE determined using the result of the channel measurement and the power parameter.
According to the invention, the UE receives a high-level configuration signaling, wherein the high-level configuration signaling comprises a plurality of power parameters corresponding to Rank Information (RI); the UE uses the received channel state information-reference symbol CSI-RS or common reference signal CRS to carry out channel measurement; the UE determines CSI by using the result of the channel measurement and the power parameter; the UE reports the CSI, the problem that the RI calculation accuracy is poor due to the fact that the same offset parameter is used for different RI when the CSI is determined in the related technology is solved, and the effect of improving the CSI accuracy is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a first flowchart of a CSI acquisition method according to an embodiment of the present invention;
fig. 2 is a second flowchart of a CSI acquisition method according to an embodiment of the present invention;
fig. 3 is a first block diagram of a CSI acquisition apparatus according to an embodiment of the present invention;
fig. 4 is a second block diagram of a CSI acquisition apparatus according to an embodiment of the present invention; and
fig. 5 is a block diagram of a CSI acquisition system according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The present invention provides a CSI processing method, and fig. 1 is a first flowchart of the CSI processing method according to an embodiment of the present invention, which includes steps S102 to S108 as follows.
Step S102, the UE receives a high-level configuration signaling, wherein the high-level configuration signaling comprises a plurality of power parameters corresponding to RI.
And step S104, the UE uses the received CSI-RS or CRS to carry out channel measurement.
And step S106, the UE determines the CSI by using the channel measurement result and the power parameter, and reports the CSI.
Preferably, the power parameter is an adjustment value parameter p-C of an energy ratio of each resource element of the downlink data and the reference signal.
Preferably, the power parameter corresponding to the RI decreases as the RI increases.
Preferably, RI is a natural number between 1 and N, N being 2, 4 or 8.
Preferably, the values or ranges of values of the power parameters corresponding to one or more RIs are the same.
Preferably, when the number of transmit antennas is 4, RI is 1,
Figure BDA0000058699520000041
RI＝2，
Figure BDA0000058699520000042
RI is 3 and 4, respectively,
Figure BDA0000058699520000043
wherein a1, a2 and a3 are real numbers and satisfy a1 ≧ a2 ≧ a 3.
Preferably, when the number of transmit antennas is 8, RI 1,
Figure BDA0000058699520000044
RI＝2，
Figure BDA0000058699520000045
RI is 3 and 4, respectively,RI is 5 to 8, and (ii) is,
Figure BDA0000058699520000047
wherein b1, b2, b3 and b4 are real numbers, and b1 is more than or equal to b2 and more than or equal to b3 and more than or equal to b 4.
The embodiment provides a CSI processing method. Fig. 2 is a second flowchart of the CSI processing method according to the embodiment of the present invention, as shown in fig. 2, including steps S202 to S206 as follows.
Step S202, the base station configures a plurality of power parameters corresponding to RI in the high-level configuration signaling.
Step S204, the base station sends the high-level configuration signaling carrying the power parameter to the UE.
In step S206, the base station receives CSI determined using the result of the channel measurement and the power parameter from the UE.
Preferably, the power parameter is a parameter p-C of an energy per resource element EPRE ratio of the downlink data to the reference signal.
Preferably, the configuring, by the base station, a plurality of power parameters corresponding to the rank information RI in the higher layer configuration signaling includes: the base station configuration and the power parameter corresponding to the RI decrease as the RI increases.
Preferably, RI is a natural number between 1 and N, N being 2, 4 or 8.
Preferably, the values or ranges of values of the power parameters corresponding to one or more RIs are the same.
According to another aspect of the present invention, there is provided a CSI processing apparatus, applied to a UE, which may be used to implement the foregoing embodiments and preferred embodiments thereof, and which has already been described and is not repeated herein, the following describes modules involved in the apparatus, and fig. 3 is a first structural block diagram of the CSI acquiring apparatus according to the embodiment of the present invention, and as shown in fig. 3, the apparatus includes: the first receiving module 32, the measuring module 34, the determining module 36 and the reporting module 38, which are described in detail below.
A first receiving module 32, configured to receive a high-layer configuration signaling, wherein the high-layer configuration signaling includes a plurality of power parameters corresponding to the RI; a measurement module 34, configured to perform channel measurement using the received CSI-RS or the reference pilot signal CRS; a determining module 36, connected to the first receiving module 32 and the measuring module 34, for determining CSI using the result of the channel measurement by the measuring module 34 and the power parameter received by the first receiving module 32; and a reporting module 38, configured to report the CSI.
This embodiment provides a CSI processing apparatus, which is applied to a UE, and which may be used to implement the foregoing embodiments and preferred embodiments thereof, and which has already been described without further description, the following describes modules involved in the apparatus, and fig. 4 is a second structural block diagram of the CSI acquisition apparatus according to the embodiment of the present invention, and as shown in fig. 4, the apparatus includes: a configuration module 42, a sending module 44 and a second receiving module 46, which are described in detail below.
A configuration module 42, configured to configure a plurality of power parameters corresponding to the rank information RI in the higher layer configuration signaling; a sending module 44, connected to the configuration module 42, configured to send the high-level configuration signaling carrying the power parameter configured by the configuration module 42 to the user equipment UE; a second receiving module 46 connected to receive the CSI determined using the result of the channel measurement and the power parameter from the UE.
Fig. 5 is a block diagram of a structure of a CSI acquisition system according to an embodiment of the present invention, and as shown in fig. 5, the system includes a first CSI processing apparatus 2 and a second CSI processing apparatus 4, where the structure of the first CSI processing apparatus 2 is shown in fig. 3, and the structure of the second CSI processing apparatus 4 is shown in fig. 4, which are not described herein again.
Reference will now be made in detail to the preferred embodiments.
First, CSI reference resources are explained in terms of time domain, frequency domain, and transmission domain.
In the frequency domain, the CSI reference resource indicates that CQI is measured on a certain bandwidth;
in the time domain, the CSI reference resource indicates measured on a certain downlink subframe, which is invalid in some cases. When the downlink subframe where the CSI reference resource is located is invalid, not reporting the CQI in the uplink subframe on the subframe n; in particular, the method comprises the following steps of,
when the CQI is fed back periodically, the downlink subframe nCQI _ ref is at least 4. That is, the CQI is measured at least 4 downlink subframes ago;
during non-periodic feedback, the CQI is measured on a downlink subframe triggered by the DCI format 0;
in the non-periodic feedback, the CQI is measured in a subframe after a subframe triggered by the Random Access Response Grant;
in the transmission domain, the CQI is calculated by PMI and RI.
Then, the following requirements are also present when calculating CQI using CSI reference resources:
in the CSI reference resource, the UE shall make the following assumptions to calculate the CQI number:
the first 3 OFDM symbols are used for control signals
No resource particles for primary/secondary synchronization signals or Physical Broadcast channels (Physical Broadcast Channel, PBCH:.)
CP Length of non-Multicast Broadcast Single Frequency Network (MBSFN) sub-frame
In redundancy version 0
Ratio between (newly added) PDSCH EPRE and CSI-RS
Transmission scheme of PDSCH according to currently configured UE transmission mode (possibly default mode)
PDSCH EPRE ratio relative to the cell-specific RS EPRE. RhoAThe following assumptions should be made:
ρ for any modulation scheme, ρ if the UE is configured for transmission mode 2 with 4 cell-specific antenna ports, or transmission mode 3 with 4 cell-specific antenna ports and the associated RI value is 1A＝PA+Δoffset+10log10(2)[dB]；
Otherwise, for any modulation scheme and any number of layers, ρA＝PA+Δoffset[dB]。
Offset deltaoffsetGiven by the parameter nomPDSCH-RSs-EPRE-Offset configured by upper layer signaling, PAIs a parameter of high-layer signaling configuration, and represents PDSCH EPRE ratio initial value, delta, relative to cell-specific RS EPREoffsetDenotes an initial adjustment value, ρ, of PDSCH EPRE relative to the ratio of cell-specific RS EPRE at the time of CQI calculationAIndicating PDSCH EPRE being cell specific when calculating CQIThere is the final value of the ratio of RS EPRE.
Regarding the definition of the CSI reference resource, in the frequency domain, the CSI reference resource is defined by a set of downlink physical resource blocks, and the downlink physical resource blocks correspond to the frequency bands corresponding to the source CQI values; in the time domain, a CSI reference resource is defined by one downlink subframe; in the transport layer domain, the CSI reference resource is defined by any RI and PMI, and the CQI is conditioned on the RI and PMI.
Preferably, for the transmission mode 9, if the eNodeB is configured with no PMI/RI or the number of CRS ports is equal to 1, the terminal UE calculates the CQI based on the CRS, and if the eNodeB is configured with PMI/RI and the number of CRS ports is greater than 1, the terminal UE calculates the CQI based on the CSI-RS.
PREFERRED EMBODIMENTS
And the base station where the UE is located configures the UE to have a precoding matrix indication PMI/RI, and the number of ports of the CRS is more than 1.
The method comprises the steps that User Equipment (UE) receives high-level signaling of CSI-RS configuration information from a base station, wherein the high-level signaling of the CSI-RS configuration information at least comprises a plurality of second power parameters, and the method is characterized in that the base station defines a second power parameter value for each rank RI value through the high-level signaling of the CSI-RS configuration;
based on the first power parameter or the second power parameter, the UE calculates the Channel State Information (CSI) of a CSI reference resource by using a CSI-RS (channel state information-reference signal) received by the UE, wherein the CSI-RS comprises an RI value, a PMI value and a CQI value;
and step S106, reporting the CSI by the UE.
Preferably, the parameters include: the second power parameter is a parameter p-C of an EPRE ratio of the downlink data to the reference signal.
Wherein,
Figure BDA0000058699520000071
is when the UE obtainsPDSCH EPRE at CSI feedback time and the ratio of CSI-RS EPRE assumptions.
Preferably, the first power parameter is for a rank
Figure BDA0000058699520000072
Has one value.
Preferably, the first power parameter is for a plurality of rank
Figure BDA0000058699520000073
Have one and the same value.
More specifically, for example: assuming that the number of transmit antennas of the base station is 4,
RI＝1，
Figure BDA0000058699520000074
RI＝2，
Figure BDA0000058699520000075
RI is 3 and 4, respectively,
Figure BDA0000058699520000076
wherein a1, a2 and a3 are real numbers, values from minus infinity to plus infinity, and satisfy a1 ≧ a2 ≧ a3, the unit is dB.
Preferably, a1 ═ 12[ dB ], a2 ═ 10[ dB ], a3 ═ a4 ═ 8[ dB ].
Preferably, a1 ═ 15[ dB ], a2 ═ 0[ dB ], a3 ═ a4 ═ 8[ dB ].
Specifically, for example: it is assumed that the number of transmit antennas is 8,
RI＝1，
Figure BDA0000058699520000077
RI＝2，
RI is 3 and 4, respectively,
Figure BDA0000058699520000079
RI is 5 to 8, and (ii) is,
Figure BDA00000586995200000710
wherein a1, a2, a3 and a4 are real numbers, values from minus infinity to plus infinity, and satisfy a1 ≥ a2 ≥ a3 ≥ a 4.
Further, a1 ═ 10[ dB ], a2 ═ 10[ dB ], a3 ═ a4 ═ 5[ dB ], a5 ═ a6 ═ a7 ═ a8 ═ 8[ dB ].
And the terminal UE reports the CSI value to the eNodeB.
More specifically, for example:
for a4 transmit antenna, a1 and a2 range from 0 to 15, and a3 and a4 range from-8 to 7.
For an 8-transmit antenna, the values of b1 and b2 range from 0 to 15, the values of b3 and b4 range from-8 to 7, and the values of b5 and b8 range from-8 to 0.
In the frequency domain, the CSI reference resource is defined by a group of downlink physical resource blocks, and the downlink physical resource blocks correspond to the frequency band corresponding to the source CQI value; in the time domain, a CSI reference resource is defined by one downlink subframe; on the transport layer domain, the CSI reference resource is defined with any RI and PMI.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
In summary, according to the embodiments of the present invention, a method for reporting channel quality information, a method for determining channel quality information, and a system are provided. Different power offset values are given based on different rank space ranks. Furthermore, through flexible configuration, the terminal can select a proper spatial rank, so that the performance of the system is improved on one hand; on the other hand, the calculation accuracy of the channel quality information is improved.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or they may be separately fabricated into various integrated circuit modules, or multiple modules or steps thereof may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. A method for processing Channel State Information (CSI) is characterized by comprising the following steps:
the method comprises the steps that User Equipment (UE) receives high-level configuration signaling, wherein the high-level configuration signaling comprises a plurality of power parameters corresponding to Rank Information (RI);
the UE uses the received channel state information-reference symbol CSI-RS or common reference signal CRS to carry out channel measurement;
and the UE determines CSI by using the channel measurement result and the power parameter and reports the CSI.
2. The method of claim 1, wherein the power parameter is a ratio p-C of an Energy Per Resource Element (EPRE) of a physical downlink data shared channel (PDSCH) to an EPRE of a CSI-RS.
3. The method of claim 1,
the power parameter corresponding to the RI decreases as the RI increases.
4. The method of claim 3, wherein RI is a natural number between 1 and N, and N is 2, 4 or 8.
5. The method of claim 3, wherein values or ranges of values of the power parameters corresponding to one or more RIs are the same.
6. The method according to any one of claims 2 to 5,
RI＝I，
Figure FDA0000058699510000011
RI＝2，
Figure FDA0000058699510000012
RI is 3 and 4, respectively,
Figure FDA0000058699510000013
wherein a1, a2 and a3 are real numbers and satisfy a1 ≧ a2 ≧ a 3.
7. The method according to any one of claims 2 to 5,
RI＝1，
Figure FDA0000058699510000014
RI＝2，
Figure FDA0000058699510000015
RI is 3 and 4, respectively,RI is 5 to 8, and (ii) is,
Figure FDA0000058699510000017
wherein b1, b2, b3 and b4 are real numbers, and b1 is more than or equal to b2 and more than or equal to b3 and more than or equal to b 4.
8. A method for processing CSI (channel State information), comprising the following steps:
the base station configures a plurality of power parameters corresponding to the rank information RI in a high-level configuration signaling;
the base station sends the high-level configuration signaling carrying the power parameter to User Equipment (UE);
the base station receives CSI determined using the channel measurement result and the power parameter from the UE.
9. The method of claim 8, wherein the power parameter is a ratio p-C of an EPRE of a PDSCH (physical downlink shared channel) to an EPRE of a CSI-RS.
10. The method as claimed in claim 8 or 9, wherein the base station configuring the plurality of power parameters corresponding to the rank information RI in the higher layer configuration signaling comprises:
the base station configuration and the power parameter corresponding to the RI decrease as the RI increases.
11. The method of claim 10, wherein RI is a natural number between 1 and N, and N is 2, 4, or 8.
12. The method of claim 10, wherein values or ranges of values of the power parameters corresponding to one or more RIs are the same.
13. A Channel State Information (CSI) processing device applied to User Equipment (UE) is characterized by comprising:
a first receiving module, configured to receive a high-level configuration signaling, where the high-level configuration signaling includes a plurality of power parameters corresponding to rank information RI;
a measurement module, configured to perform channel measurement using the received CSI-RS or CRS;
a determination module to determine CSI using the result of the channel measurement and the power parameter;
and the reporting module is used for reporting the CSI.
14. A CSI processing device applied to a base station is characterized by comprising:
the configuration module is used for configuring a plurality of power parameters corresponding to the rank information RI in the high-level configuration signaling;
a sending module, configured to send the high-level configuration signaling carrying the power parameter to a user equipment UE;
a second receiving module for receiving the CSI determined using the result of the channel measurement and the power parameter from the UE.
15. A CSI processing system, comprising:
a first CSI processing device for receiving a higher-layer configuration signaling, wherein the higher-layer configuration signaling comprises a plurality of power parameters corresponding to Rank Information (RI); and using the received channel state information-reference symbol CSI-RS or common reference signal CRS for channel measurement; determining CSI by using the channel measurement result and the power parameter, and reporting the CSI;
the second CSI processing device is used for configuring a plurality of power parameters corresponding to the rank information RI in the high-level configuration signaling; sending the high-level configuration signaling carrying the power parameter to User Equipment (UE); and receiving CSI from the UE determined using the result of the channel measurement and the power parameter.
CN201110111805.XA 2011-04-29 2011-04-29 Channel condition information processing method, apparatus and system Expired - Fee Related CN102201897B (en)

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CN201110111805.XA CN102201897B (en) 2011-04-29 2011-04-29 Channel condition information processing method, apparatus and system
PCT/CN2011/084685 WO2012146041A1 (en) 2011-04-29 2011-12-26 Channel state information processing method, apparatus and system

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