CN105165083A - Method for feeding back channel state information (CSI), user equipment, and base station - Google Patents
Method for feeding back channel state information (CSI), user equipment, and base station Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- 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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- 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
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Abstract
Disclosed are a method for feeding back CSI, user equipment, and a base station. The method comprises: determining a CSI set, the CSI set comprising first CSI and second CSI, a resource granularity of the first CSI being a physical resource block (PRB) pair occupied by an enhanced physical downlink control channel (EPDCCH), and the resource granularity of the first CSI being different from that of the second CSI; and sending the CSI set to a base station. According to the method for feeding back CSI, the user equipment and the base station in the embodiments of the present invention, the user equipment feeds back CSI of an EPDCCH to the base station, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving a channel state of the EPDCCH, improving cell coverage, saving a time-frequency resource of a system, and improving the whole performance of the system.
Description
Feeding back channel state information CSI method, user equipment and station technology field
The present embodiments relate to the communications field, and the method more particularly, to feeding back channel state information CSI, user equipment and base station.Background technology
In a wireless communication system, received link adaptation techniques and multi-emitting more（Multiple-input and Multiple-output, referred to as " MIMO ") technology can be obviously improved the data throughout of system.In link adaptation techniques, the channel quality that transmitting terminal feeds back according to receiving terminal is indicated（Channel Quality Indicator, referred to as " CQI ") dynamic adjustment modulation system and code rate so that system increases message transmission rate on the premise of certain detection performance is met.Mimo system uses multiple antennas in transmitting-receiving two-end, and sends multiple independent data flows to lift message transmission rate by space multiplexing technique, wherein, the number of independent data flow is referred to as order (rank).In addition, Long Term Evolution（Long Term Evolution, referred to as " LTE ") system defines the transmission mode based on Closed-Loop Spatial Multiplexing come the performance of lifting system, Closed-Loop Spatial Multiplexing employs the precoding technique based on code book, it is pre-designed a code book for including all possible pre-coding matrix, pre-coding matrix can indicate that the instruction is referred to as pre-coding matrix instruction with an index of code book（Precoding Matrix Indicator, referred to as " PMI ").
In the following evolution of LTE system, in order to further improve systematic function, distribution portion resource is used to send control signaling in the resource of traditional transmission data, and this newly assigned part resource is referred to as enhanced Physical Downlink Control Channel（Enhanced Physical Downlink Control Channel, referred to as " EPDCCH ").With traditional Physical Downlink Control Channel（Physical Downlink Control Channel, referred to as " PDCCH ") compare, EPDCCH can use the precoding technique based on demodulated reference signal (Demodulation Reference Signals, referred to as " DMRS ").EPDCCH resource distribution mode is that base station is that each user equipment distributes 1 or 2 EPDCCH resource collection, and each EPDCCH resource collections include multiple resource blocks（Physical Resource Block, referred to as " PRB ") right.
User equipment（User Equipment, referred to as " UE ") descending mimo channel can be estimated based on downlink reference signal, and optimal order, pre-coding matrix and channel quality information are determined based on the channel estimation, the user equipment can also be distinguished corresponding order instruction（Rank lndicator, referred to as
For " RT), PMI and CQI feedback to base station, the feedback of RI, PMI and the CQI are referred to as CSI feedbacks.The specific feedback contents of UE depend on transmission mode, such as PMI just needs feedback only under closed loop transmission pattern, and UE may need to feed back PMI when feeding back CQI simultaneously, CQI/PML is designated as however, CSI feedback of the prior art is to be directed to Physical Downlink Shared Channel（Physical Downlink Shared Channel, referred to as " PDSCH ") optimize, in the absence of the CSI feedback for EPDCCH transmission optimizations, prevent EPDCCH transmission is from reaching more preferable state, apart from base station, UE farther out possibly can not receive the control signaling of base station transmission, so as to have impact on cell coverage area and systematic function, in addition, compared with the preferable EPDCCH of channel status, the poor EPDCCH of channel status needs to take more running time-frequency resource when transmitting same signaling, so as to cause the waste of system resource.The content of the invention
The embodiment of the present invention provides a kind of feedback CSI method, user equipment and base station, it is possible to increase EPDCCH channel status.
First aspect there is provided a kind of feedback CSI method, including：Determine that CSI gathers, CSI set includes the first CSI and the 2nd CSI, first CSI resource granularity is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the 2nd CSI resource granularity；CSI set is sent to base station.
With reference in a first aspect, in the first possible implementation, the 2nd CSI resource granularity is system broad, and the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;Or the 2nd CSI resource granularity be system broad, the first CSI is CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined difference.
With reference in a first aspect, in second of possible implementation, the 2nd CSI resource granularity is systems subbands.
With reference to second of possible implementation of first aspect, in the third possible implementation, first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.
With reference to second of possible implementation of first aspect, in the 4th kind of possible implementation, the first CSI be based on the EPDCCH take the first PRB pair determine CSI with based on this first
The difference for the CSI that subband where PRB pair is determined.
Second aspect there is provided a kind of feedback CSI method, including：The CSI set that user equipment (UE) is sent is received, CSI set includes the first CSI and the 2nd CSI, the first CSI resource granularity
The Physical Resource Block PRB pair taken for enhanced Physical Downlink Control Channel EPDCCH, and the first CSI is different with the 2nd CSI resource granularity；Gathered according to the CSI, determine the channel status of the down channel between base station and the UE.
With reference to second aspect, in the first possible implementation, the 2nd CSI resource granularity is system broad, and the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;Or the 2nd CSI resource granularity be system broad, the first CSI is CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined difference.
With reference to second aspect, in second of possible implementation, the 2nd CSI resource granularity is systems subbands.
With reference to second of possible implementation of second aspect, in the third possible implementation, first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.
With reference to second of possible implementation of second aspect, in the 4th kind of possible implementation, the first CSI is the CSI and the CSI determined based on subband where first PRB pair difference that the first PRB pair taken based on the EPDCCH is determined.
The third aspect there is provided a kind of user equipment (UE), including：Determining module, for determining that CSI gathers, CSI set includes the first CSI and the 2nd CSI, and the first CSI resource granularity is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the 2nd CSI resource granularity；Sending module, CSI for sending determining module determination to base station gathers.
With reference to the third aspect, in the first possible implementation, the 2nd CSI resource granularity is system broad, and the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;Or the 2nd CSI resource granularity be system broad, the first CSI is CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined difference.
With reference to the third aspect, in second of possible implementation, the 2nd CSI resource granularity is systems subbands.
With reference to second of possible implementation of the third aspect, in the third possible implementation, first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.
With reference to second of possible implementation of the third aspect, in the 4th kind of possible implementation, the first CSI be based on the EPDCCH take the first PRB pair determine CSI with based on this first
The difference for the CSI that subband where PRB pair is determined.
Fourth aspect there is provided a kind of base station, including：Receiving module, CSI set for receiving user equipment (UE) transmission, CSI set includes the first CSI and the 2nd CSI, first CSI resource granularity is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the 2nd CSI resource granularity；Determining module, CSI for being received according to the receiving module gathers, and determines the channel status of the down channel between base station and the UE.
With reference to fourth aspect, in the first possible implementation, the 2nd CSI resource granularity is system broad, and the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;Or the 2nd CSI resource granularity be system broad, the first CSI is CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined difference.
With reference to fourth aspect, in second of possible implementation, the 2nd CSI resource granularity is systems subbands.
With reference to second of possible implementation of fourth aspect, in the third possible implementation, first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.
With reference to second of possible implementation of fourth aspect, in the 4th kind of possible implementation, the first CSI is the CSI and the CSI determined based on subband where first PRB pair difference that the first PRB pair taken based on the EPDCCH is determined.
Based on above-mentioned technical proposal, feedback CSI according to embodiments of the present invention method, user equipment and base station, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, the required accompanying drawing used in the embodiment of the present invention or description of the prior art will be briefly described below, apparently, drawings described below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the indicative flowchart of the feeding back channel state information CSI of embodiment of the present invention method.Fig. 2 is the indicative flowchart of the feedback CSI of another embodiment of the present invention method.
Fig. 3 is the schematic block diagram of the user equipment (UE) of the embodiment of the present invention.
Fig. 4 is the schematic block diagram of the base station of the embodiment of the present invention.
Fig. 5 is the schematic block diagram of the user equipment (UE) of another embodiment of the present invention.
Fig. 6 is the schematic block diagram of the base station of another embodiment of the present invention.Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made should all belong to the scope of protection of the invention.
It should be understood that the technical scheme of the embodiment of the present invention can apply to various communication systems, such as：Global system for mobile telecommunications (Global System of Mobile communication, referred to as " GSM ") system, CDMA（Code Division Multiple Access, referred to as " CDMA ") system, WCDMA（Wideband Code Division Multiple Access, referred to as " WCDMA ") system, GPRS（General Packet Radio Service, referred to as " GPRS "), Long Term Evolution（Long Term Evolution, referred to as " LTE ") system, LTE FDDs（Frequency Division Duplex, referred to as " FDD ") system, LTE time division duplexs（Time Division Duplex, referred to as " TDD "), UMTS（Universal Mobile Telecommunication System, referred to as " UMTS "), global interconnection inserting of microwave（Worldwide Interoperability for Microwave Access, referred to as " WiMAX ") communication system etc..
It should also be understood that in embodiments of the present invention, user equipment（User Equipment, referred to as " UE ") terminal can be referred to as（), Terminal mobile station (Mobile Station, referred to as " MS "), mobile terminal（Mobile Terminal) etc., the user equipment can be through wireless access network（Radio Access Network, referred to as " RAN ") communicated with one or more core nets, for example, user equipment can be mobile phone（Or be " honeycomb " phone）, computer with mobile terminal etc., for example, user equipment can also be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they exchange voice and/or data with wireless access network.
It will also be understood that, in embodiments of the present invention, base station, can be base station (the Base Transceiver Station in GSM or CDMA, referred to as " BTS "), it can also be the base station (NodeB) in WCDMA, can also be the evolved base station in LTE（Evolved Node B, referred to as " eNB " or " e-NodeB "), the present invention is to this and is not construed as limiting.
Fig. 1 shows showing for feeding back channel state information CSI according to embodiments of the present invention method 100
Meaning property flow chart, this method can be performed by user equipment (UE).As shown in figure 1, this method 100 includes：
S110, determine that CSI gathers, CSI set includes the first CSI and the 2nd CSI, and the first CSI resource granularity is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the 2nd CSI resource granularity；
S120, CSI set is sent to base station.
Therefore, feedback CSI according to embodiments of the present invention method, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.
In embodiments of the present invention, CSI set includes the first CSI and the 2nd CSI, wherein, the first CSI resource granularity is different from the 2nd CSI resource granularity.Specifically, first CSI be by EPDCCH is measured and its resource granularity be PRB pair, and it by PDSCH is measured and its resource granularity can be subband or broadband that the 2nd CSI, which can be, alternatively, CSI set can also include the CSI of other resource granularities, not limited to this of the embodiment of the present invention.
First CSI can include at least one of following：RI, PMI and CQI, the 2nd CSI can also include at least one of following：RI, PMI and CQI, but not limited to this of the embodiment of the present invention.
In embodiments of the present invention, UE feedbacks while CSI of the feedback for PDSCH, for EPDCCH CSI, can save the signaling consumption that CSI feedback is caused, further improve systematic function.
In embodiments of the present invention, the UE can periodically to base station feedback CSI, can also triggering property to base station feedback CSI, for example, the UE is receiving being fed back when being used for and indicating that the UE feeds back CSI configured information for base station transmission, but not limited to this of the embodiment of the present invention.
In addition, above-mentioned first CSI can be the CSI directly obtained based on the EPDCCH PRB pairs taken, can also be the CSI by the CSI directly obtained handle acquisition based on the EPDCCH PRB pairs taken, for example, the CSI and the 2nd CSI difference directly obtained based on the PRB pair, but not limited to this of the embodiment of the present invention.
Alternatively, the EPDCCH can take at least one EPDCCH resource collection, each EPDCCH resource collections at least one EPDCCH resource collection can include at least one PRB pairs, correspondingly, first CSI can only include the CSI that the PRB pair based on an EPDCCH resource collection is determined, the CSI that the PRB pair based on two or more EPDCCH resource collections is determined respectively, i.e. at least one EPDCCH resource set that the UE can take for the EPDCCH can also be included
Conjunction is fed back, wherein, when the UE is fed back for the EPDCCH the first EPDCCH resource collections taken, first CSI can include the CSI determined respectively based on all PRB pairs in the first EPDCCH resource collections, for example, first EPDCCH resource collections include N number of PRB pairs, N is the integer more than 0, then the first CSI can include N number of CSI values, each CSI values are determined based on a PRB pair in N number of PRB pair respectively, not limited to this of the embodiment of the present invention.
Correspondingly, the first CSI is used to feed back at least one EPDCCH resource collection that the EPDCCH takes, but not limited to this of the embodiment of the present invention.
Alternatively, 2nd CSI resource granularity can be system broad, correspondingly, first CSI can be to be directly obtained based on the EPDCCH PRB pairs taken, can also be CSI and the 2nd CSI directly obtained based on the EPDCCH PRB pairs taken difference, not limited to this of the embodiment of the present invention.
Correspondingly, the 2nd CSI resource granularity is system broad, and the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;Or
2nd CSI resource granularity is system broad, and the first CSI is the difference for CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined.
In embodiments of the present invention, the UE can obtain the first CSI in several ways, alternatively, first CSI can be the CSI and the sequence number difference for the CSI that should be obtained based on system broad that the PRB pair taken based on the EPDCCH is obtained, it can also be the difference of absolute values of the CSI based on the EPDCCH PRB pair acquisitions taken with being somebody's turn to do the CSI obtained based on system broad, the difference of such as CQI absolute value, but not limited to this of the embodiment of the present invention.
Alternatively, as another embodiment, the 2nd CSI resource granularity can be systems subbands, wherein, the systems subbands can include k continuous PRB, wherein, k is the integer more than 0, correspondingly, and the 2nd CSI resource granularity is systems subbands.
Alternatively, the 2nd CSI can include the CSI that each subband based on system is obtained respectively, can also only include the CSI that the part subband based on system is obtained, not limited to this of the embodiment of the present invention.
Alternatively, when the 2nd CSI resource granularity is systems subbands, first CSI can include the CSI directly obtained based on the PRB pair that EPDCCH takes, CSI and the 2nd CSI difference directly obtained based on the PRB pair that the EPDCCH takes, not limited to this of the embodiment of the present invention can also be included.
Correspondingly, the first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.
Wherein, when the first CSI includes the CSI based on the acquisition of the first PRB pair, 2nd CSI does not include the CSI obtained based on subband where first PRB pair, in other words, when the 2nd CSI includes the CSI that the first subband based on system is obtained, first CSI does not include the CSI obtained based on the PRB that first subband includes, but not limited to this of the embodiment of the present invention.
Alternatively, as another embodiment, the first CSI is first taken based on the EPDCCH
The CSI that PRB pair is determined and the CSI determined based on subband where first PRB pair difference.
Wherein, subband where first PRB pair refers to include the subband of first PRB pair.In addition, the embodiment of the present invention can obtain the 2nd CSI in several ways, alternatively, 2nd CSI can be the sequence number difference for the CSI that the CSI obtained based on first PRB pair is obtained with subband where first PRB pair, it can also be the difference of the absolute value for the CSI that the CSI obtained based on first PRB pair is obtained with subband where first PRB pair, the difference of such as CQI absolute value, but not limited to this of the embodiment of the present invention.
Therefore, feedback CSI according to embodiments of the present invention method, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.
Above in conjunction with Fig. 1, the method that feedback CSI according to embodiments of the present invention is described in detail from UE angle, below in conjunction with Fig. 2, the method that feedback CSI according to embodiments of the present invention is described in detail from the angle of base station.
Fig. 2 shows the indicative flowchart of the feedback CSI of another embodiment of the present invention method 200, this method can be performed by any suitable device, such as can as base station, base station controller or network side server network element perform, for the ease of description, illustrated below so that method 200 is performed by base station as an example, but not limited to this of the embodiment of the present invention.As shown in Fig. 2 this method 200 includes：
S210, receive the CSI set that user equipment (UE) is sent, CSI set includes the first CSI and the 2nd CSI, first CSI resource granularity is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the 2nd CSI resource granularity；
S220, gathers according to the CSI, determines the channel status of the down channel between base station and the UE.Therefore, feedback CSI according to embodiments of the present invention method, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.
Alternatively, the 2nd CSI resource granularity is system broad, and the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;Or
2nd CSI resource granularity is system broad, and the first CSI is the difference for CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined.
Alternatively, the 2nd CSI resource granularity is systems subbands.
Alternatively, as another embodiment, the first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.
Alternatively, as another embodiment, the first CSI is the CSI and the CSI determined based on subband where first PRB pair difference that the first PRB pair taken based on the EPDCCH is determined.
Therefore, feedback CSI according to embodiments of the present invention method, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.
It should be understood that the size of the sequence number of above-mentioned each process is not meant to the priority of execution sequence, the execution sequence of each process should be determined with its function and internal logic, and any limit is constituted without tackling the implementation process of the embodiment of the present invention.
Above in conjunction with Fig. 1 to Fig. 2, the method that feedback CSI according to embodiments of the present invention is described in detail, below in conjunction with Fig. 3 to Fig. 6, description base station according to embodiments of the present invention and user equipment.
Fig. 3 shows the schematic block diagram of user equipment (UE) 300 according to embodiments of the present invention, such as schemes
Shown in 3, the UE 300 includes：
Determining module 310, for determining that CSI gathers, CSI set includes the first CSI and the 2nd CSI, and the first CSI resource granularity is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the 2nd CSI resource granularity；
Sending module 320, for sending the CSI set that determining module 310 is determined to base station.Therefore, user equipment according to embodiments of the present invention, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.
Alternatively, the 2nd CSI resource granularity is system broad, and the first CSI includes being based on being somebody's turn to do
The CSI that the PRB pair that EPDCCH takes is obtained;Or
2nd CSI resource granularity is system broad, and the first CSI is the difference for CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined.
Alternatively, as another embodiment, the 2nd CSI resource granularity is systems subbands.
Alternatively, as another embodiment, the first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.
Alternatively, as another embodiment, the first CSI is the CSI and the CSI determined based on subband where first PRB pair difference that the first PRB pair taken based on the EPDCCH is determined.
The user equipment that user equipment 300 according to embodiments of the present invention may correspond in the method for instruction pilot conditions according to embodiments of the present invention, and above and other operation and/or function of the modules in user equipment 300 is respectively in order to realize the corresponding flow of each method in Fig. 1, for sake of simplicity, will not be repeated here.
Therefore, user equipment according to embodiments of the present invention, by user equipment to base station feedback
EPDCCH CSI so that the base station can be optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthens the coverage of cell and saves the running time-frequency resource of system, the overall performance of lifting system.
Fig. 4 shows the schematic block diagram of base station 400 according to embodiments of the present invention, as shown in figure 4, the base station 400 includes：
Receiving module 410, CSI set for receiving user equipment (UE) transmission, CSI set includes the first CSI and the 2nd CSI, first CSI resource granularity is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the 2nd CSI resource granularity；
Determining module 420, CSI for being received according to the receiving module 410 gathers, and determines the channel status of the down channel between the base station and the UE.
Therefore, base station according to embodiments of the present invention, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.
Alternatively, the 2nd CSI resource granularity is system broad, and the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;Or
2nd CSI resource granularity is system broad, and the first CSI is to be accounted for based on the EPDCCH
The CSI that PRB pair is determined and the 2nd CSI difference.
Alternatively, as another embodiment, the 2nd CSI resource granularity is systems subbands.
Alternatively, as another embodiment, the first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.
Alternatively, as another embodiment, the first CSI is the CSI and the CSI determined based on subband where first PRB pair difference that the first PRB pair taken based on the EPDCCH is determined.
The user equipment that base station 400 according to embodiments of the present invention may correspond in the method for instruction pilot conditions according to embodiments of the present invention, and above and other operation and/or function of the modules in base station 400 is respectively in order to realize the corresponding flow of each method in Fig. 2, for sake of simplicity, no longer Redundant is stated herein.
Therefore, base station according to embodiments of the present invention, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.
Fig. 5 shows the schematic block diagram of user equipment (UE) 500 according to another embodiment of the present invention, as shown in figure 5, the UE 500 includes：Processor 510, memory 520, bus system 530 and transmitter 540.Wherein, processor 510, memory 520 are connected with transmitter 540 by bus system 530, the memory 520 is used for store instruction, the processor 510 passes through the bus system 530, call the instruction stored in the memory 520, for determining that CSI gathers, CSI set includes the first CSI and the 2nd CSI, first CSI resource granularity is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the 2nd CSI resource granularity；The transmitter 540 is used to gather to the CSI that base station sends the processor 510 determination.
Therefore, user equipment according to embodiments of the present invention, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.
It should be understood that in embodiments of the present invention, the processor 510 can be CPU（Central Processing Unit, referred to as " CPU "), the processor 510 can also be other general processors, digital signal processor（DSP), application specific integrated circuit（ASIC), ready-made programmable gate array（) or other PLDs, discrete gate or transistor logic, discrete hardware components etc. FPGA.
General processor can be microprocessor or the processor can also be any conventional processor etc..The memory 520 can include read-only storage and random access memory, and provide instruction and data to processor 510.The a part of of memory 520 can also include nonvolatile RAM.For example, memory 520 can be with the information of storage device type.
The bus system 530 can also include power bus, controlling bus and status signal bus in addition etc. in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 530 in figure.
In implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 510 or the instruction of software form.The step of method with reference to disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and perform completion, or perform completion with the hardware in processor and software module combination.Software module can be located in random access memory, flash memory, read-only storage, the ripe storage medium in this area such as programmable read only memory or electrically erasable programmable memory, register.The storage medium is located at memory 520, and processor 510 reads the information in memory 520, the step of completing the above method with reference to its hardware.To avoid repeating, it is not detailed herein.
Alternatively, the 2nd CSI resource granularity is system broad, and the first CSI includes being based on being somebody's turn to do
The CSI that the PRB pair that EPDCCH takes is obtained;Or
2nd CSI resource granularity is system broad, and the first CSI is the difference for CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined.
Alternatively, as another embodiment, the 2nd CSI resource granularity is systems subbands.
Alternatively, as another embodiment, the first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.
Alternatively, as another embodiment, the first CSI is first taken based on the EPDCCH
The CSI that PRB pair is determined and the CSI determined based on subband where first PRB pair difference.
The user equipment that user equipment 500 according to embodiments of the present invention may correspond in the method for instruction pilot conditions according to embodiments of the present invention, and above and other operation and/or function of the modules in user equipment 500 is respectively in order to realize the corresponding flow of each method in Fig. 1, for sake of simplicity, will not be repeated here.
Therefore, user equipment according to embodiments of the present invention, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save system
The running time-frequency resource of system, the overall performance of lifting system.
Fig. 6 shows the schematic block diagram of base station 600 according to another embodiment of the present invention, as shown in fig. 6, the base station 600 includes：Processor 610, memory 620, bus system 630 and receiver 640.Wherein, processor 610, memory 620 is connected with receiver 640 by bus system 630, the memory 620 is used for store instruction, the processor 610 passes through the bus system 630, call the instruction stored in the memory 620, specifically, the receiver 640 is used for the CSI set for receiving user equipment (UE) transmission, CSI set includes the first CSI and the 2nd CSI, first CSI resource granularity is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI it is different with the 2nd CSI resource granularity；；The CSI that the processor 610 is used to be received according to the receiver 640 gathers, and determines the channel status of the down channel between the base station and the UE.
Therefore, base station according to embodiments of the present invention, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.
It should be understood that in embodiments of the present invention, the processor 610 can be CPU（Central
Processing Unit, referred to as " CPU "), the processor 610 can also be other general processors, digital signal processor（DSP), application specific integrated circuit（ASIC), ready-made programmable gate array（) or other PLDs, discrete gate or transistor logic, discrete hardware components etc. FPGA.General processor can be microprocessor or the processor can also be any conventional processor etc..
The memory 620 can include read-only storage and random access memory, and provide instruction and data to processor 610.The a part of of memory 620 can also include nonvolatile RAM.For example, memory 620 can be with the information of storage device type.
The bus system 630 can also include power bus, controlling bus and status signal bus in addition etc. in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 630 in figure.
In implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 610 or the instruction of software form.The step of method with reference to disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and perform completion, or perform completion with the hardware in processor and software module combination.Software module can be located in random access memory, flash memory, read-only storage, the ripe storage medium in this area such as programmable read only memory or electrically erasable programmable memory, register.The storage medium is located at memory 620, and processor 610 reads the information in memory 620, with reference to it
The step of hardware completes the above method.To avoid repeating, it is not detailed herein.
Alternatively, the 2nd CSI resource granularity is system broad, and the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;Or
2nd CSI resource granularity is system broad, and the first CSI is the difference for CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined.
Alternatively, as another embodiment, the 2nd CSI resource granularity is systems subbands.
Alternatively, as another embodiment, the first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.
Alternatively, as another embodiment, the first CSI is first taken based on the EPDCCH
The CSI that PRB pair is determined and the CSI determined based on subband where first PRB pair difference.
The user equipment that base station 600 according to embodiments of the present invention may correspond in the method for instruction pilot conditions according to embodiments of the present invention, and above and other operation and/or function of the modules in base station 600 is respectively in order to realize the corresponding flow of each method in Fig. 2, for sake of simplicity, no longer Redundant is stated herein.
Therefore, base station according to embodiments of the present invention, by CSI from user equipment to base station feedback EPDCCH, the base station is optimized according to the CSI of the EPDCCH to the EPDCCH, so as to improve the channel status of the EPDCCH, strengthen the coverage of cell and save the running time-frequency resource of system, the overall performance of lifting system.
It should be understood that in embodiments of the present invention, term " and/or " it is only a kind of incidence relation for describing affiliated partner, expression may have three kinds of relations.For example, A and/or B, can be represented：Individualism A, while there is A and B, these three situations of individualism B.In addition, character "/" herein, typically represent forward-backward correlation object be it is a kind of " or " relation.
Those of ordinary skill in the art can be appreciated that, various method steps and unit with reference to described in the embodiments described herein, it can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate the interchangeability of hardware and software, the step of generally describing each embodiment according to function in the above description and composition.These functions are performed with hardware or software mode actually, depending on the application-specific and design constraint of technical scheme.Those of ordinary skill in the art can realize described function to each specific application using distinct methods, but this realization is it is not considered that beyond the scope of this invention.
It is apparent to those skilled in the art that, it is for convenience of description and succinctly, above-mentioned
The specific work process of the system of description, device and unit, may be referred to the corresponding process in preceding method embodiment, no longer Redundant is stated herein.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can realize by another way.For example, device embodiment described above is only schematical, for example, the division of the unit, it is only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can combine or be desirably integrated into another system, or some features can be ignored, or do not perform.In addition, shown or discussed coupling or direct-coupling or communication connection each other can be by the INDIRECT COUPLING of some interfaces, device or unit or communication connection or electricity, mechanical or other forms are connected.
The unit illustrated as separating component can be or may not be physically separate, and the part shown as unit can be or may not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Some or all of unit therein can be selected to realize the purpose of scheme of the embodiment of the present invention according to the actual needs.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit or unit is individually physically present or two or more units are integrated in a unit.Above-mentioned integrated unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is realized using in the form of SFU software functional unit and as independent production marketing or in use, can be stored in a computer read/write memory medium.Understood based on such, the part that technical scheme substantially contributes to prior art in other words, or all or part of the technical scheme can be embodied in the form of software product, the computer software product is stored in a storage medium, including some instructions are to cause a computer equipment（Can be personal computer, server, or network equipment etc.）Perform all or part of step of each embodiment methods described of the invention.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage（Read-Only Memory, referred to as " ROM "), random access memory（Random Access Memory, referred to as " RAM "), magnetic disc or CD etc. are various can be with the medium of store program codes.
It is described above; only embodiment of the invention; but protection scope of the present invention is not limited thereto; any one skilled in the art the invention discloses technical scope in; various equivalent modifications or substitutions can be readily occurred in, these modifications or substitutions should be all included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (1)
- Claim1. a kind of feeding back channel state information CSI method, it is characterised in that including：Determine that CSI gathers, the CSI set includes the first CSI and the 2nd CSI, the resource granularity of first CSI is PRB pairs of the Physical Resource Block that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the resource granularity of the 2nd CSI；The CSI set is sent to base station.2. according to the method described in claim 1, it is characterised in that the resource granularity of the 2nd CSI is system broad, the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;OrThe resource granularity of 2nd CSI is system broad, and the first CSI is based on describedThe CSI that the PRB pair that EPDCCH takes is determined and the 2nd CSI difference.3. according to the method described in claim 1, it is characterised in that the resource granularity of the 2nd CSI is systems subbands.4. method according to claim 3, it is characterized in that, first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.5. method according to claim 3, it is characterised in that the first CSI is the CSI and the CSI determined based on subband where first PRB pair difference that the first PRB pair taken based on the EPDCCH is determined.6. a kind of feeding back channel state information CSI method, it is characterised in that including：Receive the CSI set that user equipment (UE) is sent, the CSI set includes the first CSI and the 2nd CSI, the resource granularity of first CSI is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the resource granularity of the 2nd CSI；Gathered according to the CSI, determine the channel status of the down channel between base station and the UE.7. method according to claim 6, it is characterised in that the resource granularity of the 2nd CSI is system broad, the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;OrThe resource granularity of 2nd CSI is system broad, and the first CSI is the difference for CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined.8. method according to claim 6, it is characterised in that the resource granularity of the 2nd CSI is systems subbands.9. method according to claim 8, it is characterized in that, first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.10. method according to claim 8, it is characterised in that the first CSI is the CSI and the CSI determined based on subband where first PRB pair difference that the first PRB pair taken based on the EPDCCH is determined.11. a kind of user equipment (UE), it is characterised in that including：Determining module, for determining that CSI gathers, the CSI set includes the first CSI and the 2nd CSI, the resource granularity of first CSI is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the resource granularity of the 2nd CSI；Sending module, for sending the CSI set that the determining module is determined to base station.12. UE according to claim 11, it is characterised in that the resource granularity of the 2nd CSI is system broad, the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;OrThe resource granularity of 2nd CSI is system broad, and the first CSI is based on describedThe CSI that the PRB pair that EPDCCH takes is determined and the 2nd CSI difference.13. UE according to claim 11, it is characterised in that the resource granularity of the 2nd CSI is systems subbands.14. UE according to claim 13, it is characterized in that, first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.15. UE according to claim 13, it is characterised in that the first CSI is the CSI and the CSI determined based on subband where first PRB pair difference that the first PRB pair taken based on the EPDCCH is determined.16. a kind of base station, it is characterised in that including：Receiving module, CSI set for receiving user equipment (UE) transmission, the CSI set includes the first CSI and the 2nd CSI, the resource granularity of first CSI is the Physical Resource Block PRB pair that enhanced Physical Downlink Control Channel EPDCCH takes, and the first CSI is different with the resource granularity of the 2nd CSI；Determining module, the CSI for being received according to the receiving module gathers, and determines the channel status of the down channel between base station and the UE.17. base station according to claim 16, it is characterised in that the resource granularity of the 2nd CSI is system broad, the first CSI includes the CSI that PRB pair is obtained taken based on the EPDCCH;OrThe resource granularity of 2nd CSI is system broad, and the first CSI is the difference for CSI and the 2nd CSI that the PRB pair taken based on the EPDCCH is determined.18. base station according to claim 16, it is characterised in that the resource granularity of the 2nd CSI is systems subbands.19. base station according to claim 18, it is characterized in that, first CSI includes the CSI that the first PRB pair is obtained taken based on the EPDCCH, and the 2nd CSI includes the CSI determined based on the systems subbands in addition to subband where first PRB pair.20. base station according to claim 18, it is characterised in that the first CSI is the CSI and the CSI determined based on subband where first PRB pair difference that the first PRB pair taken based on the EPDCCH is determined.
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