CN104303445A - CSI feedback method of enhanced physical downlink control channel and user equipment - Google Patents

CSI feedback method of enhanced physical downlink control channel and user equipment Download PDF

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Publication number
CN104303445A
CN104303445A CN201380002667.9A CN201380002667A CN104303445A CN 104303445 A CN104303445 A CN 104303445A CN 201380002667 A CN201380002667 A CN 201380002667A CN 104303445 A CN104303445 A CN 104303445A
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epdcch
csi
specific csi
resource block
physical resource
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CN104303445B (en
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刘建琴
高驰
周永行
刘江华
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0675—Space-time coding characterised by the signaling
    • 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
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H04L1/0675—Space-time coding characterised by the signaling
    • H04L1/0693—Partial feedback, e.g. partial channel state information [CSI]

Abstract

A CSI feedback method of an enhanced physical downlink control channel (EPDCCH) and a user equipment (UE), wherein the feedback method comprises: the UE detecting CSI feedback triggering signaling; the UE feeding back EPDCCH-specific CSI information to a base station based on CSI configuration information contained in an EPDCCH-specific CSI process of the UE, wherein the EPDCCH-specific CSI information contains CSI information corresponding to a physical resource block in an EPDCCH set of the UE. By feeding back the CSI information corresponding to the physical resource block in the corresponding EPDCCH set based on the CSI configuration information contained in the EPDCCH-specific CSI process, the present invention can effectively implement transmission of the EPDCCH, thus improving transmission performance of the EPDCCH.

Description

CSI feedback method of enhanced physical downlink control channel and user equipment
The CSI feedback method and user equipment technical field of enhanced Physical Downlink Control Channel
The present embodiments relate to the CSI feedback method and user equipment of communication technical field, more particularly to a kind of enhanced Physical Downlink Control Channel.
Background technology in a wireless communication system, is received more link adaptation techniques and multi-emitting（English full name is：Multiple-Input and Multiple-Output, are abbreviated as：MIMO) technology can be obviously improved the data throughout of system, and the channel quality that link adaptation techniques feed back according to receiving terminal is indicated（English full name is：Channel Quality Indicator, are abbreviated as：CQI) dynamic adjustment modulation system and code rate, so that system can increase message transmission rate on the premise of certain detection performance is met, mimo system uses multiple antennas compared to traditional a single aerial system in transmitting-receiving two-end, mimo system sends multiple independent data flows to lift message transmission rate by space multiplexing technique, and the number of the independent data flow is referred to as order（English name is： rank ).Long Term Evolution（English name is： Long Term Evolution;It is abbreviated 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 be indexed indicate with one of code book, referred to as pre-coding matrix instruction（English full name is： Precoding Matrix Indicator;It is abbreviated as： PMI ).User equipment（English name is： User Equipment;It is abbreviated as：UE descending mimo channel) is estimated based on downlink reference signal, and optimal order, pre-coding matrix and channel quality information are determined based on the channel estimation, and is distinguished corresponding order instruction（English full name is： Rank Indicator;It is abbreviated as：RI), PMI and CQI feedback are to base station, and RI, PMI and CQI feedback are referred to as channel condition information（English full name is： Channel State Information;It is abbreviated as：CSI) feed back.Wherein, the specific feedback contents of UE depend on transmission mode, and such as PMI just needs feedback only under closed loop transmission pattern.
The enhanced Physical Downlink Control Channel in LTE-Advanced following evolution（English full name is：
Enhanced Physical Downlink Control Channel；It is abbreviated as：EPDCCH) it is introduced into meet the capacity and covering demand of following control information transmission.With traditional Physical Downlink Shared Channel（English full name is： Physical Downlink Shared Channel;It is abbreviated as：PDSCH) compare, EPDCCH can be used and is based on demodulated reference signal（English full name is： Demodulation Reference Signals; It is abbreviated as：DM-RS precoding technique), further to improve capacity.According to the difference of transmission means, E-PDCCH can be divided into centralized EPDCCH and distribution EPDCCH.Form (the i.e. aggregation level of EPDCCH transmission）Including 1,2,4,8,16 or 32, in L logical control channel elements, (English full name is Enhanced Control Channel Element to the EPDCCH control channel that aggregation level is L, is abbreviated as：ECCE) transmitted on corresponding physical resource.For centralized EPDCCH, the corresponding resource units of an ECCE concentrate on a Physical Resource Block to upper, for distributed EPDCCH, and the corresponding resource units of an ECCE are distributed in multiple Physical Resource Block to upper.And different from rank adaptations of the PDSCH under Closed-Loop Spatial Multiplexing, the data transfer of EPDCCH only support layers 1, i.e. order perseverance are 1.
At present, the EPDCCH resources of each user are at most configurable to two EPDCCH set.The two EPDCCH gather：Two centralization EPDCCH set；Or two distribution EPDCCH set；Or a centralization and a distributed EPDCCH set.
It was found from the content of foregoing description, EPDCCH transmission mechanism and the content of CSI feedback etc. are all different from PDSCH of the prior art, but in the prior art and in the absence of the CSI feedback for EPDCCH, and in order to realize EPDCCH CSI feedback, EPDCCH transmission of the prior art is using with PDSCH identical CSI feedbacks, i.e. EPDCCH reuses and PDSCH identicals RI and based on this PMI and CQI feedback for indicating order etc..
The PDSCH reused in the prior art CSI feedback can not match EPDCCH transmission well, so as to result in the decline of EPDCCH transmission performances.The content of the invention
The embodiments of the invention provide a kind of EPDCCH CSI feedback method and user equipment, for realizing EPDCCH CSI feedback to match EPDCCH transmission, so as to improve EPDCCH transporting
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First aspect present invention provides a kind of EPDCCH CSI feedback method, including：
User equipment (UE) detection CSI feedback triggering signaling；
The CSI configuration informations that the UE is included according to the specific CSI processes of EPDCCH of the UE are to the specific CSI information of base station feedback EPDCCH, and the Physical Resource Block in the specific CSI information of EPDCCH in the EPDCCH set comprising the UE is to corresponding CSI information.
In the first possible implementation of first aspect, the UE includes the first EPDCCH collection Close and the 2nd EPDCCH set, the first EPDCCH set and the UE specific CSI processes of the first EPDCCH have corresponding relation, and the 2nd EPDCCH set and the specific CSI processes of the 2nd EPDCCH of the UE have corresponding relation.
The first possible implementation with reference to first aspect, in second of possible implementation：Occur simultaneously if the first EPDCCH set of the UE has with the 2nd EPDCCH set, the specific CSI processes of the first EPDCCH and the specific CSI processes of the 2nd EPDCCH are gathered comprising the first EPDCCH concentrates the Physical Resource Block included to corresponding CSI configuration informations with the 2nd EPDCCH unions of sets；
Or,
Occur simultaneously if the first EPDCCH set of the UE has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI information, the specific CSI processes of 2nd EPDCCH are comprising the Physical Resource Block in the 3rd EPDCCH set to corresponding CSI configuration informations, and the 3rd EPDCCH collection is combined into the 2nd EPDCCH set except set of the Physical Resource Block to composition with the first EPDCCH set identical Physical Resource Block in addition to；
Or,
Occur simultaneously if the first EPDCCH set of the UE has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI configuration informations, and the specific CSI processes of the 2nd EPDCCH are comprising the Physical Resource Block in the 2nd EPDCCH set to corresponding CSI configuration informations.
In first aspect in the third possible implementation, the UE includes the first EPDCCH set and the 2nd EPDCCH set, and the specific CSI processes of the 3rd EPDCCH of the first EPDCCH set and the 2nd EPDCCH set with the UE have corresponding relation.
The third possible implementation with reference to first aspect, in the 4th kind of possible implementation, the specific CSI processes of the 3rd EPDCCH are gathered comprising the first EPDCCH concentrates the Physical Resource Block included to corresponding CSI configuration informations with the 2nd EPDCCH unions of sets.
The third possible implementation with reference to first aspect, in the 5th kind of possible implementation, the specific CSI processes of 3rd EPDCCH the nTl moment comprising the first EPDCCH gather in Physical Resource Block to corresponding CSI configuration informations, the specific CSI processes of the 3rd EPDCCH are at the mT2 moment Physical Resource Block in gathering comprising the 2nd EPDCCH is to corresponding CSI configuration informations, and the n and m are positive integer.
In the 6th kind of possible implementation of first aspect, the type of EPDCCH set has corresponding relation with the specific CSI processes of the EPDCCH, and the Physical Resource Block in the corresponding EPDCCH set of the type of the EPDCCH set that the specific CSI processes of EPDCCH are included with it has corresponding relation is to corresponding CSI configuration informations.
With reference to the first possible implementation of first aspect, or second of possible implementation, or the third possible implementation, or the 4th kind of possible implementation, or the 5th kind of possible implementation, or the 6th kind of possible implementation, in the 7th kind of possible implementation, the CSI configuration informations that the UE is included according to the specific CSI processes of EPDCCH of the UE also include to before the specific CSI information of base station feedback EPDCCH：
The UE receives configuration signal, gather the corresponding relation between the specific CSI processes of the EPDCCH comprising the EPDCCH in the configuration signal, or the first possible implementation of the combination first aspect is included in the configuration signal, or second of possible implementation, or the third possible implementation, or the 4th kind of possible implementation, or the 5th kind of possible implementation, or the 6th kind of possible implementation, in the 8th kind of possible implementation, definition；Or it is predefined to be.
Second aspect of the present invention provides a kind of UE, including：
Detection unit, for detecting that CSI feedback triggers signaling；Information is to the specific CSI information of base station feedback EPDCCH, and the Physical Resource Block in the specific CSI information of EPDCCH in the EPDCCH set comprising the UE is to corresponding CSI information.
In second aspect in the first possible implementation：The UE gathers comprising the first EPDCCH set and the 2nd EPDCCH, and the first EPDCCH set and the UE specific CSI processes of the first EPDCCH have corresponding relation, the 2nd EPDCCH set and the second of the UE The specific CSI processes of EPDCCH have corresponding relation；
And if the first EPDCCH set of the UE has common factor with the 2nd EPDCCH set, the specific CSI processes of the first EPDCCH and the specific CSI processes of the 2nd EPDCCH are gathered comprising the first EPDCCH concentrates the Physical Resource Block included to corresponding CSI configuration informations with the 2nd EPDCCH unions of sets；
Or,
Occur simultaneously if the first EPDCCH set of the UE has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI configuration informations, the specific CSI processes of 2nd EPDCCH are comprising the Physical Resource Block in the 3rd EPDCCH set to corresponding CSI configuration informations, and the 3rd EPDCCH collection is combined into the 2nd EPDCCH set except set of the Physical Resource Block to composition with the first EPDCCH set identical Physical Resource Block in addition to；
Or,
Occur simultaneously if the first EPDCCH set of the UE has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI configuration informations, and the specific CSI processes of the 2nd EPDCCH are comprising the Physical Resource Block in the 2nd EPDCCH set to corresponding CSI configuration informations.
In second of possible implementation of second aspect, the UE includes the first EPDCCH set and the 2nd EPDCCH set, and the specific CSI processes of the 3rd EPDCCH of the first EPDCCH set and the 2nd EPDCCH set with the UE have corresponding relation；
And the specific CSI processes of the 3rd EPDCCH gather the Physical Resource Block included with the 2nd EPDCCH unions of sets concentration to corresponding CSI configuration informations comprising the first EPDCCH, or, the specific CSI processes of 3rd EPDCCH are at the nTl moment comprising the Physical Resource Block in the first EPDCCH set to corresponding CSI configuration informations, the specific CSI processes of 3rd EPDCCH the mT2 moment comprising the 2nd EPDCCH gather in Physical Resource Block to corresponding CSI configuration informations, the n and m be positive integer.
In second aspect in the third possible implementation, the type of EPDCCH set has corresponding relation with the specific CSI processes of the EPDCCH, the physical resource in the corresponding EPDCCH set of the type of the EPDCCH set that the specific CSI processes of EPDCCH are included with it has corresponding relation Block is to corresponding CSI configuration informations.
Gather first aspect the first possible implementation, either second of possible implementation or the third possible implementation, in the 4th kind of possible implementation, the UE also includes：
Configuration signal detection unit, for receiving configuration signal before the feedback unit, gather the corresponding relation between the specific CSI processes of the EPDCCH comprising the EPDCCH in the configuration signal, or the corresponding relation between the EPDCCH types gathered and the specific CSI processes of the EPDCCH is included in the configuration signal.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
UE is detected after the specific CSI feedback triggering signalings of EPDCCH, and the CSI configuration informations included according to the specific CSI processes of the EPDCCH of the UE, should to the specific CSI information of base station feedback EPDCCH
Physical Resource Block in EPDCCH set of the specific CSI packets of EPDCCH containing UE is to corresponding
CSI information, the configuration information in the specific CSI processes of EPDCCH feeds back the specific CSI information of EPDCCH of the UE, EPDCCH transmission can be effectively realized, so as to improve EPDCCH transmission performance.Brief description of the drawings
One schematic diagram of the CSI feedback method that Fig. 1 is a kind of EPDCCH in the embodiment of the present invention；Fig. 2 is a schematic diagram of the structure of user equipment in the embodiment of the present invention；
Fig. 3 is another schematic diagram of the structure of user equipment in the embodiment of the present invention.
Embodiment
The embodiments of the invention provide a kind of EPDCCH CSI feedback method and user equipment, for realizing EPDCCH transmission, so as to improve EPDCCH transmission performance.
In order to be better understood from technical scheme, Fig. 1 is referred to, the embodiment for the CSI feedback method for being a kind of EPDCCH in the embodiment of the present invention, including：
101st, UE detects CSI feedback triggering signaling；
In embodiments of the present invention, UE detects CSI feedback triggering signaling, and the signaling is used to trigger UE to base station feedback UE CSI.And CSI feedback triggering signaling is physical layer control signaling, such as up DCI or accidental access response permit (Random Access Response Grant).
102nd, the CSI configuration informations that UE is included according to the UE specific CSI processes of EPDCCH are to base station The Physical Resource Block in the specific CSI information of EPDCCH, the specific CSI information of EPDCCH in the EPDCCH set comprising UE is fed back to corresponding CSI information.
In lte-a system, it is what be can configure that the supported CSI of UE, which enter number of passes, for example, can be configured to 1,2,3 or 4 etc., wherein, these CSI processes are used equally for PDSCH or EPDCCH CSI to configure.
In embodiments of the present invention, in order to improve EPDCCH transmission performance, at least one CSI process in the CSI processes that UE is configured is configured to the specific CSI processes of EPDCCH, and the specific CSI processes of the EPDCCH refer to that the Physical Resource Block that the CSI in the CSI processes is configured in EPDCCH set is configured to corresponding CSI.Therefore, UE can be configured according to the CSI in the specific CSI processes of EPDCCH to base station feedback EPDCCH gather in Physical Resource Block to corresponding CSI information.
In embodiments of the present invention, CSI information include CSI metrical informations and CSI feedback information, wherein CSI metrical informations include CSI-RS zero energys, non-zero power, interferometry configuration etc., CSI feedback information include order instruction（), RI pre-coding matrix instruction（), PMI channel quality is indicated（), CQI precoding type is indicated (PTI) etc..
In embodiments of the present invention, UE detect CSI feedback triggering signaling after, by according to the UE's
The CSI configuration informations that the specific CSI processes of EPDCCH are included are to the specific CSI information of base station feedback EPDCCH, and the Physical Resource Block in gathering in the specific CSI information of the EPDCCH comprising EPDCCH is to corresponding CSI information.
In embodiments of the present invention, base station will receive the specific CSI information of EPDCCH of UE feedbacks, enabling the effective transmission for realizing EPDCCH, improve EPDCCH transmission performance.
In embodiments of the present invention, UE is configured one or two EPDCCH set, if an ECCE of EPDCCH set resource unit is in a Physical Resource Block to upper, then EPDCCH set can be described as centralized EPDCCH set, if an ECCE of EPDCCH set is distributed at least two Physical Resource Block to upper, EPDCCH set can be described as distributed EPDCCH set, therefore, being allocated to UE EPDCCH set has three kinds of combined situations, including：One or two centralized EPDCCH set；One or two distributed EPDCCH set；One centralization EPDCCH set and a distribution EPDCCH set are, it is necessary to which explanation, being allocated to the number and type of UE EPDCCH set can be configured by high-rise RRC signaling.
In embodiments of the present invention, can configure UE has the specific CSI processes of at least one EPDCCH, The specific CSI of the EPDCCH for introducing UE respectively are entered into EPDCCH specific CSI of the number of passes more than 1 and UE below and enter number of passes in the case of 1, the corresponding relation between UE EPDCCH set and the specific CSI processes of EPDCCH.
1) the UE specific CSI of EPDCCH enter number of passes more than 1 and EPDCCH set number be 2 in the case of, system can set the corresponding relation between the specific CSI processes of UE EPDCCH and UE two EPDCCH set by way of pre-setting, or, the corresponding relation between the UE specific CSI processes of EPDCCH and UE two EPDCCH set is indicated by RRC signaling.
For the ease of description, UE two EPDCCH set can be referred to as the first EPDCCH set and the 2nd EPDCCH gathers.Especially, when the specific CSI of UE EPDCCH enter number of passes more than or equal to 2, UE is by way of pre-defined or mode that RRC is signaled is gathered and the corresponding relation between the UE specific CSI processes of EPDCCH to obtain the first EPDCCH set and the 2nd EPDCCH.Such as when it is 2 that EPDCCH CSI, which enter number of passes, pre-define the first EPDCCH and gather corresponding with first EPDCCH CSI process, the 2nd EPDCCH set is corresponding with second EPDCCH CSI process.Or the corresponding relation between the semi-static notice EPDCCH set of RRC signaling and the specific CSI processes of EPDCCH.
In embodiments of the present invention, UE can gather the CSI configuration informations that the specific CSI processes of correspondence setting EPDCCH between the specific CSI processes of EPDCCH are included according to EPDCCH, wherein, the corresponding relation that EPDCCH gathers between the specific CSI processes of EPDCCH specifically has following several situations, including：
A1) occur simultaneously if UE the first EPDCCH set has with the 2nd EPDCCH set, i.e., first
When EPDCCH gathers with including identical Physical Resource Block pair in the 2nd EPDCCH set, then the specific CSI processes of the first EPDCCH and the specific CSI processes of the 2nd EPDCCH can gather Physical Resource Block that in gathering with the 2nd EPDCCH and concentration includes to corresponding CSI configuration informations comprising the first EPDCCH, for example：If the Physical Resource Block in the first EPDCCH set is A, B, C, D, Physical Resource Block in 2nd EPDCCH set is C, D, E, F, and concentrate the Physical Resource Block included to be A, B, C, D, E, F, then the specific CSI processes of the first EPDCCH and the specific CSI processes of the 2nd EPDCCH can include Physical Resource Block A, B, C, the corresponding CSI configuration informations of D, E, F.
A2) occur simultaneously if UE the first EPDCCH set has with the 2nd EPDCCH set, first The specific CSI processes of EPDCCH are comprising the Physical Resource Block in the first EPDCCH set to corresponding CSI configuration informations, the specific CSI processes of 2nd EPDCCH are comprising the Physical Resource Block in the 3rd EPDCCH set to corresponding CSI configuration informations, wherein, 3rd EPDCCH collection is combined into the 2nd EPDCCH set set of the Physical Resource Block to composition in addition to identical Physical Resource Block in gathering with the first EPDCCH, for example：If the Physical Resource Block in the first EPDCCH set is to including A, B, C, D, Physical Resource Block in 2nd EPDCCH set is to including C, D, E, F, there is identical Physical Resource Block pair between this two set, and available 3rd EPDCCH set, Physical Resource Block in the set is to including E and F, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to A, B, C, D CSI configuration informations, the specific CSI processes of 2nd EPDCCH are comprising Physical Resource Block in the 3rd EPDCCH set to E, F CSI configuration informations.
A3) occur simultaneously if UE the first EPDCCH set has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI configuration informations, and the specific CSI processes of the 2nd EPDCCH are comprising the Physical Resource Block in the 2nd EPDCCH set to corresponding CSI configuration informations.
2) in the case where the UE numbers that there is the specific CSI processes of an EPDCCH and UE EPDCCH to gather are 2, system can set the corresponding relation between the specific CSI processes of UE EPDCCH and UE two EPDCCH set by way of pre-setting, or, system can also send RRC signaling to UE, corresponding relation in the RRC signaling between the specific CSI processes of EPDCCH comprising UE and UE two EPDCCH set, that is the specific CSI processes of the 3rd EPDCCH that the first EPDCCH set of UE and the 2nd EPDCCH gather with UE have corresponding relation.
In embodiments of the present invention, the corresponding relation between the first EPDCCH set and the 2nd EPDCCH set and the UE specific CSI processes of the 3rd EPDCCH has following several situations, including：
B1) the specific CSI processes of the 3rd EPDCCH are gathered with the 2nd EPDCCH unions of sets Physical Resource Block that includes of concentration to corresponding CSI configuration informations comprising the first EPDCCH, for example:If the Physical Resource Block in the first EPDCCH set is to for A, B, C, D, Physical Resource Block in 2nd EPDCCH set is to for C, D, E, F, then the first EPDCCH set is grouped as A with the 2nd EPDCCH unions of sets, B, C, D, E, F, the specific CSI processes of the 3rd EPDCCH include Physical Resource Block, B, C, D, E, F CSI configuration informations.
B2) the specific CSI processes of the 3rd EPDCCH are in the nTl moment gathers comprising the first EPDCCH Physical Resource Block to corresponding CSI configuration informations, and the 3rd the specific CSI processes of EPDCCH the mT2 moment comprising the 2nd EPDCCH gather in Physical Resource Block to corresponding CSI configuration informations, and the n and m is positive integer so that the specific CSI processes of the 3rd EPDCCH can be gathered with the Physical Resource Block in the 2nd EPDCCH set to corresponding CSI configuration informations comprising the first EPDCCH in turn.
It should be noted that, " first ", " second " " the 3rd " in " the first EPDCCH set ", " the 2nd EPDCCH set ", " the 3rd EPDCCH set " is only used for distinguishing different EPDCCH set in embodiments of the present invention, the number of Physical Resource Block pair and the type of set that include in set is not caused to limit.In addition, " first ", " second ", " the 3rd " in " the specific CSI processes of the first EPDCCH ", " the specific CSI processes of the 2nd EPDCCH ", " the specific CSI processes of the 3rd EPDCCH " is also only used for the difference specific CSI processes of EPDCCH corresponding from different set.
It should be noted that in embodiments of the present invention, the specific CSI processes of the first EPDCCH include the specific CSI processes of at least one EPDCCH, the specific CSI processes of the 2nd EPDCCH also include the specific CSI processes of at least one EPDCCH.
In embodiments of the present invention, the specific CSI processes of each EPDCCH of UE configurations can be included covers different configurations more, and carry out periodicity switching between many set configurations so that the Physical Resource Block in corresponding EPDCCH set is sent to corresponding CSI information different CSI configuration informations not can be used in the same time.Here, the corresponding EPDCCH set of the specific CSI processes of EPDCCH can be with not identical or different in the same time.And the different configuration of many sets that the specific CSI processes of EPDCCH are included is obtained by the different configurations of each field in the specific CSI processes of EPDCCH.
Foregoing description be EPDCCH set the specific CSI processes of EPDCCH between correspondence setting situation, be described below EPDCCH set type and the specific CSI processes of EPDCCH between there is corresponding relation.
In embodiments of the present invention, system can pre-set the corresponding relation between the specific CSI processes of the EPDCCH of type and the UE of UE two EPDCCH set, or system can send RRC signaling to UE, corresponding relation between the specific CSI processes of the EPDCCH of type and the UE that the EPDCCH comprising the UE gathers in the RRC signaling, and the UE specific CSI processes of EPDCCH include Physical Resource Block in the type corresponding EPDCCH set for the EPDCCH set for having corresponding relation with it to corresponding CSI configuration informations, so that different types of EPDCCH set has the specific CSI processes of different EPDCCH.For example, gathering corresponding EPDCCH for distributed EPDCCH CSI-RS in specific CSI processes can be configured to predefined fixed pattern, and the bandwidth CQI feedback mechanism that order perseverance is 1 is used in CSI feedback mechanism, gather for centralized EPDCCH then use the specific CSI-RS of UE configure and order perseverance for 1 subband CQI/PMI feedback mechanisms.
In embodiments of the present invention, UE class EPDCCH set can correspond to the specific CSI processes of at least one EPDCCH.
In embodiments of the present invention, UE is detected after CSI feedback triggering signaling, the CSI configuration informations included according to the specific CSI processes of UE EPDCCH are to the specific CSI information of base station feedback EPDCCH, and the Physical Resource Block in gathering in the specific CSI information of the EPDCCH comprising EPDCCH is to corresponding CSI information, Physical Resource Block is to corresponding CSI information during the EPDCCH for feeding back the UE by the CSI configuration informations included according to the specific CSI processes of EPDCCH gathers, EPDCCH transmission can effectively be realized, so as to improve EPDCCH transmission performance.
Referring to Fig. 2, be one embodiment of the structure of user equipment in the embodiment of the present invention, including：Detection unit 201, for detecting that CSI feedback triggers signaling；
Feedback unit 202, the CSI configuration informations included for the specific CSI processes of EPDCCH according to the UE are to the specific CSI information of base station feedback EPDCCH, and the Physical Resource Block in the specific CSI information of EPDCCH in the EPDCCH set comprising the UE is to corresponding CSI information.
It is preferred that, in embodiments of the present invention, UE also includes：
Configuration signal receiving unit 203, for receiving configuration signal before the feedback unit 202, gather the corresponding relation between the specific CSI processes of the EPDCCH comprising the EPDCCH in the configuration signal, or the corresponding relation between the EPDCCH types gathered and the specific CSI processes of the EPDCCH is included in the configuration signal.
In embodiments of the present invention, UE detection unit 201 is detected after CSI feedback triggering signaling, Physical Resource Block in feedback of the standing specific CSI information of EPDCCH, the specific CSI information of the EPDCCH in the EPDCCH set comprising UE is to corresponding CSI information.Wherein, UE feedback unit 202 is to before the specific CSI information of base station feedback EPDCCH, configuration signal will be received by configuration signal receiving unit 203, gather the corresponding relation between the specific CSI processes of EPDCCH comprising EPDCCH in the configuration signal, or include the corresponding relation between the EPDCCH types gathered and the specific CSI processes of EPDCCH. In lte-a system, it is what be can configure that the supported CSI of UE, which enter number of passes, for example, can be configured to 1,2,3 or 4 etc., wherein, each CSI processes are used equally for PDSCH and EPDCCH data transfer.In embodiments of the present invention, in order to improve EPDCCH transmission performance, at least one CSI process in the CSI processes that UE is configured is set to the specific CSI processes of EPDCCH, and the specific CSI processes of the EPDCCH refer to CSI feedback in the CSI processes comprising Physical Resource Block in EPDCCH set to corresponding CSI configuration informations.Therefore, UE can ^^ according to the specific CSI processes of EPDCCH CSI configuration informations to base station feedback EPDCCH gather in Physical Resource Block to correspondence CSI information.
In embodiments of the present invention, CSI information includes CSI metrical informations and CSI feedback information.
In embodiments of the present invention, UE detection unit 201 is detected after CSI feedback triggering signaling, the CSI configuration informations included from EPDCCH specific CSI process of the feedback unit 202 according to UE are to the specific CSI information of base station feedback EPDCCH, the corresponding CSI information of the Physical Resource Block pair in gathering in the specific CSI information of the EPDCCH comprising EPDCCH.It should be noted that one or more CSI processes of feedback.
In embodiments of the present invention, UE gathers comprising one or two EPDCCH, if an ECCE of EPDCCH set resource unit is in a Physical Resource Block to upper, then EPDCCH set can be described as centralized EPDCCH set, if an ECCE of EPDCCH set is distributed at least two Physical Resource Block to upper, EPDCCH set can be described as distributed EPDCCH set, therefore, the EPDCCH set that UE is included has three kinds of combined situations, including：UE includes one or two centralized EPDCCH set；UE includes one or two distributed EPDCCH set；UE is comprising a centralization EPDCCH set and a distribution EPDCCH set, it is necessary to which explanation, the number and type of UE EPDCCH set can be configured by high-rise RRC signaling.
In embodiments of the present invention, configurable UE has the specific CSI processes of at least one EPDCCH, the specific CSI of the EPDCCH for introducing UE respectively are entered into EPDCCH specific CSI of the number of passes more than 1 and UE below and enter number of passes in the case of 1, the corresponding relation between UE EPDCCH set and the specific CSI processes of EPDCCH.
1) the UE specific CSI of EPDCCH enter number of passes more than 1 and EPDCCH set number be 2 in the case of, system can be set by way of pre-setting the specific CSI processes of UE EPDCCH with Corresponding relation between UE two EPDCCH set, or, the corresponding relation between the UE specific CSI processes of EPDCCH and UE two EPDCCH set is indicated by RRC signaling.
For the ease of description, UE two EPDCCH set can be referred to as the first EPDCCH set and the 2nd EPDCCH gathers.Especially, when the specific CSI of UE EPDCCH enter number of passes more than or equal to 2, UE is by way of pre-defined or mode that RRC is signaled is gathered and the corresponding relation between the UE specific CSI processes of EPDCCH to obtain the first EPDCCH set and the 2nd EPDCCH.
In embodiments of the present invention, UE can gather the CSI configuration informations included in the specific CSI processes of correspondence setting EPDCCH between the specific CSI processes of EPDCCH according to EPDCCH, wherein, the corresponding relation that EPDCCH gathers between the specific CSI processes of EPDCCH specifically has following several situations, including：
A1) occur simultaneously if UE the first EPDCCH set has with the 2nd EPDCCH set, that is when the first EPDCCH gathers with including identical Physical Resource Block pair in the 2nd EPDCCH set, then the specific CSI processes of the first EPDCCH and the specific CSI processes of the 2nd EPDCCH can gather Physical Resource Block that in gathering with the 2nd EPDCCH and concentration includes to corresponding CSI configuration informations comprising the first EPDCCH, for example：If the Physical Resource Block in the first EPDCCH set is A, B, C, D, Physical Resource Block in 2nd EPDCCH set is C, D, E, F, and concentrate the Physical Resource Block included to be A, B, C, D, E, F, then the specific CSI processes of the first EPDCCH and the specific CSI processes of the 2nd EPDCCH can include Physical Resource Block A, B, C, the corresponding CSI configuration informations of D, E, F.
A2) occur simultaneously if UE the first EPDCCH set has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI configuration informations, the specific CSI processes of 2nd EPDCCH are comprising the Physical Resource Block in the 3rd EPDCCH set to corresponding CSI configuration informations, wherein, 3rd EPDCCH collection is combined into the 2nd EPDCCH set set of the Physical Resource Block to composition in addition to identical Physical Resource Block in gathering with the first EPDCCH, for example：If the Physical Resource Block in the first EPDCCH set is to including A, B, C, D, Physical Resource Block in 2nd EPDCCH set is to including C, D, E, F, there is identical Physical Resource Block pair between this two set, and available 3rd EPDCCH set, the Physical Resource Block in the set is to including E and F, then the specific CSI processes of the first EPDCCH are comprising in the first EPDCCH set Physical Resource Block to A, B, C, D CSI configuration informations, the specific CSI processes of the 2nd EPDCCH are comprising Physical Resource Block in the 3rd EPDCCH set to E, F CSI configuration informations.
A3) occur simultaneously if UE the first EPDCCH set has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI configuration informations, and the specific CSI processes of the 2nd EPDCCH are comprising the Physical Resource Block in the 2nd EPDCCH set to corresponding CSI configuration informations.
2) in the case where the UE numbers that there is the specific CSI processes of an EPDCCH and UE EPDCCH to gather are 2, system can set the corresponding relation between the specific CSI processes of UE EPDCCH and UE two EPDCCH set by way of pre-setting, or, system can also send RRC signaling to UE, corresponding relation in the RRC signaling between the specific CSI processes of EPDCCH comprising UE and UE two EPDCCH set, that is the specific CSI processes of the 3rd EPDCCH that the first EPDCCH set of UE and the 2nd EPDCCH gather with UE have corresponding relation.
In embodiments of the present invention, the corresponding relation between the first EPDCCH set and the 2nd EPDCCH set and the UE specific CSI processes of the 3rd EPDCCH has following several situations, including：
B1) the specific CSI processes of the 3rd EPDCCH include the first EPDCCH set and second
EPDCCH unions of sets concentrate the Physical Resource Block that includes to corresponding CSI configuration informations, for example:If the Physical Resource Block in the first EPDCCH set is to for A, B, C, D, Physical Resource Block in 2nd EPDCCH set is to for C, D, E, F, then the first EPDCCH set is grouped as A with the 2nd EPDCCH unions of sets, B, C, D, E, F, the specific CSI processes of the 3rd EPDCCH include Physical Resource Block eight, B, C, D, E, F CSI configuration informations.
B2 the Physical Resource Block during) the specific CSI processes of the 3rd EPDCCH are gathered at the nTl moment comprising the first EPDCCH is to corresponding CSI configuration informations, and the 3rd the specific CSI processes of EPDCCH the mT2 moment comprising the 2nd EPDCCH gather in Physical Resource Block to corresponding CSI configuration informations, and the n and m is positive integer so that the specific CSI processes of the 3rd EPDCCH can be gathered with the Physical Resource Block in the 2nd EPDCCH set to corresponding CSI configuration informations comprising the first EPDCCH in turn.
It should be noted that, " first ", " second " " the 3rd " in " the first EPDCCH set ", " the 2nd EPDCCH set ", " the 3rd EPDCCH set " is only used for distinguishing different EPDCCH set in embodiments of the present invention, the number of Physical Resource Block pair and the type of set that include in set is not caused to limit.In addition, " the specific CSI processes of the first EPDCCH ", " the 2nd specific CSI of EPDCCH " first ", " second ", " the 3rd " in process ", " the specific CSI processes of the 3rd EPDCCH " is also only used for the difference specific CSI processes of EPDCCH corresponding from different set.
It should be noted that in embodiments of the present invention, the specific CSI processes of the first EPDCCH include the specific CSI processes of at least one EPDCCH, the specific CSI processes of the 2nd EPDCCH also include the specific CSI processes of at least one EPDCCH.
In embodiments of the present invention, the specific CSI processes of EPDCCH of UE configurations can include many set configurations, and carry out periodicity switching between many set configurations so that the Physical Resource Block in the corresponding EPDCCH set of transmission is configured to corresponding CSI information different CSI not can be used in the same time.
Foregoing description be EPDCCH set the specific CSI processes of EPDCCH between correspondence setting situation, be described below EPDCCH set type and the specific CSI processes of EPDCCH between there is corresponding relation.
In embodiments of the present invention, system can pre-set the corresponding relation between the specific CSI processes of the EPDCCH of type and the UE of UE two EPDCCH set, or system can send RRC signaling to UE, corresponding relation between the specific CSI processes of the EPDCCH of type and the UE that the EPDCCH comprising the UE gathers in the RRC signaling, and the UE specific CSI processes of EPDCCH include Physical Resource Block in the type corresponding EPDCCH set for the EPDCCH set for having corresponding relation with it to corresponding CSI configuration informations, so that different types of EPDCCH set has the specific CSI processes of different EPDCCH.For example, gather the CSI-RS in the corresponding specific CSI processes of EPDCCH for distributed EPDCCH and can be configured to predefined fixed pattern, and the broadband CQI feedback mechanism that order perseverance is 1 is used in CSI feedback mechanism, gather for centralized EPDCCH then use the specific CSI-RS of UE configure and order perseverance for 1 subband CQI/PMI feedback mechanisms.
In embodiments of the present invention, UE class EPDCCH set can correspond to the specific CSI processes of at least one EPDCCH.
In embodiments of the present invention, UE is detected after CSI feedback triggering signaling, the CSI configuration informations included according to the specific CSI processes of the EPDCCH of the UE are to the specific CSI information of base station feedback EPDCCH, and the Physical Resource Block in gathering in the specific CSI information of the EPDCCH comprising EPDCCH is to corresponding CSI information, Physical Resource Block is to corresponding CSI information during the EPDCCH for feeding back the UE by the CSI configuration informations included according to the specific CSI processes of EPDCCH gathers, EPDCCH transmission can effectively be realized, so as to improve EPDCCH transmission performance. Fig. 3 is referred to, is the embodiment of the structure of user equipment in the embodiment of the present invention, including：Processor 301, dispensing device 302, reception device 303 and memory 304;
Wherein, processor 301 is used to detect that CSI feedback triggers signaling, and CSI configuration informations that the dispensing device 302 included according to the UE specific CSI processes of EPDCCH are triggered after CSI feedback triggering signaling is detected to the specific CSI information of base station feedback EPDCCH, the Physical Resource Block in the specific CSI information of the EPDCCH in the EPDCCH set comprising UE is to corresponding CSI information.
One of ordinary skill in the art will appreciate that realizing that all or part of step in above-described embodiment method can be by program to instruct the hardware of correlation to complete, described program can be stored in a kind of computer-readable recording medium, storage medium mentioned above can be read-only storage, disk or CD etc..
Above to the CSI feedback method and user equipment of a kind of enhanced Physical Downlink Control Channel provided by the present invention, it is described in detail, for those of ordinary skill in the art, thought according to the embodiment of the present invention, it will change in specific embodiments and applications, in summary, this specification content should not be construed as limiting the invention.

Claims (1)

  1. Claim
    1st, a kind of enhanced Physical Downlink Control Channel EPDCCH CSI back method, it is characterised in that including：
    User equipment (UE) detection CSI feedback triggering signaling；
    The CSI configuration informations that the UE is included according to the specific CSI processes of EPDCCH of the UE are to the specific CSI information of base station feedback EPDCCH, and the Physical Resource Block in the specific CSI information of EPDCCH in the EPDCCH set comprising the UE is to corresponding CSI information.
    2nd, the feedback method according to claim 1, it is characterized in that, the UE includes the first EPDCCH set and the 2nd EPDCCH set, the first EPDCCH set and the UE specific CSI processes of the first EPDCCH have corresponding relation, and the 2nd EPDCCH set and the specific CSI processes of the 2nd EPDCCH of the UE have corresponding relation.
    3rd, feedback method according to claim 2, it is characterised in that
    Occur simultaneously if the first EPDCCH set of the UE has with the 2nd EPDCCH set, the specific CSI processes of the first EPDCCH and the specific CSI processes of the 2nd EPDCCH are gathered comprising the first EPDCCH concentrates the Physical Resource Block included to corresponding CSI configuration informations with the 2nd EPDCCH unions of sets；
    Or,
    Occur simultaneously if the first EPDCCH set of the UE has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI configuration informations, the specific CSI processes of 2nd EPDCCH are comprising the Physical Resource Block in the 3rd EPDCCH set to corresponding CSI configuration informations, and the 3rd EPDCCH collection is combined into the 2nd EPDCCH set except set of the Physical Resource Block to composition with the first EPDCCH set identical Physical Resource Block in addition to；
    Or,
    Occur simultaneously if the first EPDCCH set of the UE has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI configuration informations, and the specific CSI processes of the 2nd EPDCCH are comprising the Physical Resource Block in the 2nd EPDCCH set to corresponding CSI configuration informations.
    4th, the feedback method according to claim 1, it is characterised in that the UE includes first EPDCCH gathers and the 2nd EPDCCH set, and the specific CSI processes of the 3rd EPDCCH of the first EPDCCH set and the 2nd EPDCCH set with the UE have corresponding relation.
    5th, feedback method according to claim 4, characterized in that, the specific CSI processes of the 3rd EPDCCH are gathered comprising the first EPDCCH concentrates the Physical Resource Block included to corresponding CSI configuration informations with the 2nd EPDCCH unions of sets.
    6th, feedback method according to claim 4, it is characterized in that, the specific CSI processes of 3rd EPDCCH are at the nTl moment comprising the Physical Resource Block in the first EPDCCH set to corresponding CSI configuration informations, the specific CSI processes of 3rd EPDCCH the mT2 moment comprising the 2nd EPDCCH gather in Physical Resource Block to corresponding CSI configuration informations, the n and m be positive integer.
    7th, feedback method according to claim 1, it is characterized in that, the type of EPDCCH set has corresponding relation with the specific CSI processes of the EPDCCH, and the Physical Resource Block in the corresponding EPDCCH set of the type of the EPDCCH set that the specific CSI processes of EPDCCH are included with it has corresponding relation is to corresponding CSI configuration informations.
    8th, the feedback method according to any one of claim 1 to 7, it is characterised in that the CSI configuration informations that the UE is included according to the specific CSI processes of EPDCCH of the UE also include to before the specific CSI information of base station feedback EPDCCH：
    The UE receives configuration signal, gather the corresponding relation between the specific CSI processes of the EPDCCH comprising the EPDCCH in the configuration signal, or the described 9, feedback method according to any one of claim 1 to 7 is included in the configuration signal, it is characterised in that：Definition；Or it is predefined to be.
    10th, a kind of user equipment (UE), it is characterised in that including：
    Detection unit, for detecting that CSI feedback triggers signaling；
    Feedback unit, the CSI configuration informations included for the specific CSI processes of EPDCCH according to the UE are to the specific CSI information of base station feedback EPDCCH, and the Physical Resource Block in the specific CSI information of EPDCCH in the EPDCCH set comprising the UE is to corresponding CSI information. 11st, UE according to claim 9, it is characterized in that, the UE includes the first EPDCCH set and the 2nd EPDCCH set, the first EPDCCH set and the UE specific CSI processes of the first EPDCCH have corresponding relation, and the 2nd EPDCCH set and the specific CSI processes of the 2nd EPDCCH of the UE have corresponding relation；
    And if the first EPDCCH set of the UE has common factor with the 2nd EPDCCH set, the specific CSI processes of the first EPDCCH and the specific CSI processes of the 2nd EPDCCH are gathered comprising the first EPDCCH concentrates the Physical Resource Block included to corresponding CSI configuration informations with the 2nd EPDCCH unions of sets；
    Or,
    Occur simultaneously if the first EPDCCH set of the UE has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI configuration informations, the specific CSI processes of 2nd EPDCCH are comprising the Physical Resource Block in the 3rd EPDCCH set to corresponding CSI configuration informations, and the 3rd EPDCCH collection is combined into the 2nd EPDCCH set except set of the Physical Resource Block to composition with the first EPDCCH set identical Physical Resource Block in addition to；
    Or,
    Occur simultaneously if the first EPDCCH set of the UE has with the 2nd EPDCCH set, Physical Resource Block during then the specific CSI processes of the first EPDCCH are gathered comprising the first EPDCCH is to corresponding CSI configuration informations, and the specific CSI processes of the 2nd EPDCCH are comprising the Physical Resource Block in the 2nd EPDCCH set to corresponding CSI configuration informations.
    12nd, UE according to claim 9, it is characterized in that, the UE includes the first EPDCCH set and the 2nd EPDCCH set, and the specific CSI processes of the 3rd EPDCCH of the first EPDCCH set and the 2nd EPDCCH set with the UE have corresponding relation；
    And the specific CSI processes of the 3rd EPDCCH gather the Physical Resource Block included with the 2nd EPDCCH unions of sets concentration to corresponding CSI configuration informations comprising the first EPDCCH, or, the specific CSI processes of 3rd EPDCCH are at the nTl moment comprising the Physical Resource Block in the first EPDCCH set to corresponding CSI configuration informations, the specific CSI processes of 3rd EPDCCH the mT2 moment comprising the 2nd EPDCCH gather in Physical Resource Block to corresponding CSI configuration informations, the n and m be positive integer. 13rd, UE according to claim 9, it is characterized in that, the type of EPDCCH set has corresponding relation with the specific CSI processes of the EPDCCH, and the Physical Resource Block in the corresponding EPDCCH set of the type of the EPDCCH set that the specific CSI processes of EPDCCH are included with it has corresponding relation is to corresponding CSI configuration informations.
    14th, the UE according to any one of claim 11 to 13, it is characterised in that the UE also includes：
    Configuration signal detection unit, for receiving configuration signal before the feedback unit, gather the corresponding relation between the specific CSI processes of the EPDCCH comprising the EPDCCH in the configuration signal, or the corresponding relation between the EPDCCH types gathered and the specific CSI processes of the EPDCCH is included in the configuration signal.
    15th, a kind of user equipment, it is characterised in that including：
    Processor, dispensing device, reception device and memory；
    The processor is used to detect that CSI feedback triggers signaling, and after the CSI feedback signaling is detected, CSI configuration informations that the dispensing device included according to the specific CSI processes of EPDCCH of the UE are triggered to the specific CSI information of base station feedback EPDCCH, the Physical Resource Block in the specific CSI information of EPDCCH in the EPDCCH set comprising the UE is to corresponding CSI information.
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