CN102684850B - Channel state information feedback method, user equipment and base station - Google Patents

Channel state information feedback method, user equipment and base station Download PDF

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Publication number
CN102684850B
CN102684850B CN201110057916.7A CN201110057916A CN102684850B CN 102684850 B CN102684850 B CN 102684850B CN 201110057916 A CN201110057916 A CN 201110057916A CN 102684850 B CN102684850 B CN 102684850B
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China
Prior art keywords
csi
feedback resource
user equipment
instruction
forms
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CN201110057916.7A
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CN102684850A (en
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杨曾
黄磊
丁铭
刘仁茂
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Sharp Corp
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Sharp Corp
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Priority to CN201110057916.7A priority Critical patent/CN102684850B/en
Priority to PCT/JP2012/055732 priority patent/WO2012124552A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention proposes a kind of CSI back method, comprises the following steps：From base station receiving channel state information reference signal CSI RS measuring assembly configuration signals, the CSI RS measuring assemblies configuration signal includes the instruction of the CSI RS measuring assemblies for user device configuration；According to the instruction of the CSI RS measuring assemblies, the CSI RS in the CSI RS measuring assemblies are measured, to obtain the metric corresponding with the CSI RS forms in the CSI RS measuring assemblies；Obtain CSI RS and report set, it is, according to the metric, to be selected from the CSI RS measuring assemblies that the CSI RS report set；It is determined that the CSI feedback resource corresponding with the CSI RS forms in CSI RS report set；And using identified CSI feedback resource, to the base station feedback CSI corresponding with the CSI RS forms in CSI RS report set.Present invention also offers corresponding user equipment and base station.

Description

Channel state information feedback method, user equipment and base station
Technical field
The present invention relates to communication technical field, collaborative multicast communication scene is particularly suited for more particularly, to one kind Channel state information feedback method, user equipment and base station.
Background technology
3GPP (3G (Third Generation) Moblie Partnership Program) tissue is the international organization in moving communicating field, and it is in 3G honeycombs Played an important role in the standardization effort of the communication technology.3GPP designs EUTRA (evolution organizing since the second half year in 2004 UMTS and Terrestrial Radio access) and EUTRAN (the UMTS net and continental rise of evolution without Line is electrically accessed net), the project is also referred to as LTE (Long Term Evolution is also called LTE Rel-8) project.In April, 2008,3GPP groups Be woven in China Shenzhen meeting, start to inquire into 4G cellular communication systems standardization effort (currently referred to as lte-a system, and Referred to as LTE Rel-10).In lte-a system, the concept of CoMP (collaborative multicast communication) obtains extensive concern and support, its Core concept is by the dynamic cooperation between multiple transfer points (Transmission Point) for geographically separating, under solution Row problem of inter-cell interference, so as to improve the message transmission rate and Consumer's Experience of cell boundary users.
(3GPP TR36.814V9.0.0, the Evolved Universal Terrestrial of 3GPP research reports 36.814 Radio Access(E-UTRA)；Further advancements for E-UTRA physical layer aspects, Some concepts and basic terms defined in 3GPP) in CoMP scenes.
Serving cell (Serving Cell) refers to the small of single transmission PDCCH (Physical Downlink Control Channel) information Area, this is existing concept in LTE.
CoMP transmission mode generally falls into two categories below：Combined Treatment (Joint Processing, JP) and collaborative Scheduling/beam forming (Coordinated Scheduling/Beamforming, CS/CB).Data are present in Combined Treatment In each transfer point in CoMP cooperations set (Cooperating Set), joint transmission (Joint is divided into again Transmission, JT) and dynamic cell selection (Dynamic Cell Selection, DCS), the difference of both is PDSCH (Physical Downlink Shared Channel) transmission is that occur in the multiple transmission point in the set that cooperates or in single transmission point. Data are existed only on Serving cell in performing coordinated scheduling/beam forming, and the scheduling of user equipment and the decision-making of beam forming It is to be made on the basis of the cooperation between CoMP cooperates the transfer point in gathering.
User equipment in CoMP needs to be directed between one group of each cell base station equipment of cell measurement and user equipment Channel status/the statistical information of link.This group of cell is referred to as CoMP measuring assemblies (Measurement Set).User equipment The cell of actual feedback information can be a subset of measuring assembly, referred to as report set (Reported Set).Measurement collection Closing can be identical with CoMP cooperations set (Cooperating Set), and the cell base station equipment in cooperation set is direct or indirect Ground participates in the transmission of the Physical Downlink Shared Channel for user equipment.Cooperation set can not also be saturating to user equipment It is bright.For being configured to the user equipment of CoMP patterns, feedback in the form of the every cell individually feedback based on, and feed back biography It is defeated to be carried out on the ascending resource of Serving cell.
The 50th meeting of 3GPP RAN further have modified LTE Rel-11CoMP research contents (RP-101425, Revised SID Proposal：Coordinated Multi-point Operation for LTE, Samsung).In order to Expand the scope of application, distributed wireless far module in such as heterogeneous network (HeterogeneousNetworks) and/or cell Unconventional deployment scenarios such as (also known as RRH or RRU) is also included into the goal in research of CoMP.According to 3GPP RANl The conclusion of the 63bis times meeting, CoMP researchs will be carried out for following four deployment scenario：
Scene 1：CoMP in standing；
Scene 2：Ask CoMP in station；
Scene 3：Multiple cell ID：All transfer points in macrocell covering possess different cell ID；
Scene 4：Shared cell ID：All transfer points in macrocell covering possess identical cell ID.
A hypothesis being had in above-mentioned all scenes is that the communication between transfer point is low delay, limitless volumes, this It is also the most direct benefit brought using distribution RRH, because now the medium between connection transfer point is usually The limitation of optical fiber, transmission delay and bandwidth is greatly relaxed.
According to bibliography R1-110461 (R1-110461, Baseline Schemes and Focus0f CoMP Studies, Ericsson, ST-Ericsson) and R1-110649 (R1-110649, Aspects 0n Distributed RRU S with Shared Cell-ID lor Heterogeneous Deployments, Ericsson, ST-Ericsson), In above-mentioned CoMP scenes, no matter whether cell ID is shared between transfer point, in order to obtain the effective CSI (letters of each transmission point Channel state information) to feed back, each transmission point needs independent CSI-RS (channel state information reference signals) form (Pattern).The content of the form of CSI-RS includes the sequence of 1) CSI-RS, 2) quantity of antenna opening (Port), 3) CSI-RS Time-frequency location in a subframe, cycle, sub-frame offset, 4) data and CSI-RS EPRE (power is per Resource Unit) ratio； Each need PDSCH mourn in silence (muting) CSI-RS form, including time-frequency locations of the CSI-RS in a subframe, week Phase, sub-frame offset etc..These information may be referred to 36.211 (TS36.211, V10.0.0, Physical channels and Modulation, 3GPP) 6.10.5 section or 36.331 (TS36.331, V10.0.0, Radio Resource Control (RRC)；Protocol specification, 3GPP) 6.3.2 definition of the section on CSI-RS-Config.Each user sets The standby measurement CSI-RS and transmission point set for feeding back CSI should be specific (UE Specific) user equipment, therefore CSI-RS It is specific that the configuration of form should also be user equipment.Base station equipment is according to the upward signal of the user equipment for receiving, such as SRS (Sounding Reference Signal), PUCCH (Physical Uplink Control Channel) signals and PUSCH (Physical Uplink Shared Channel) signal etc. Measurement result, configuration user equipment needs the set of the CSI-RS forms of measurement, referred to as CSI-RS measuring assemblies.This CSI- Transfer point corresponding to RS measuring assemblies constitutes the CoMP measuring assemblies of original definition, and its size is by RRC (wireless heterogeneous networks) Signaling is configured.CSI-RS reports a subset that set is CSI-RS measuring assemblies, and the CoMP corresponding to original definition converges Report set, its size is also configured by RRC signaling.
In current standardization is discussed, still no specific method is used to realize select one from CSI-RS measuring assemblies Subset is reported as CSI-RS and gathered, and the signaling related to this selection is transmitted between base station equipment and user equipment, This problem constitutes main research of the invention.
The content of the invention
A subset how is selected from CSI-RS measuring assemblies as CSI-RS reports it is an object of the invention to be directed to The problem of set, there is provided a kind of novel channel state information feedback method, user equipment and base station, is particularly suited for collaborative Multicast communication scene.
First scheme of the invention, it is proposed that a kind of channel condition information (CSI) feedback method, including following step Suddenly：From base station receiving channel state information reference signal (CSI-RS) measuring assembly configuration signal, the CSI-RS measuring assemblies Configuration signal includes the instruction of the CSI-RS measuring assemblies for the user device configuration；According to the CSI-RS measuring assemblies Instruction, the CSI-RS in the CSI-RS measuring assemblies is measured, with obtain with the CSI-RS measuring assemblies The corresponding metric of CSI-RS forms；Obtain CSI-RS and report set, it is according to the degree that the CSI-RS reports set Amount information, selects from the CSI-RS measuring assemblies；It is determined that reporting the CSI-RS form phases in set with the CSI-RS Corresponding CSI feedback resource；And using identified CSI feedback resource, reported to base station feedback and the CSI-RS and gathered In the corresponding CSI of CSI-RS forms.
Preferably, the metric include it is following at least one：Channel quality indicates (CQI), pre-coding matrix instruction (PMI), reference signal receives energy (RSRP) and Reference Signal Received Quality (RSRQ).
Preferably, obtaining the step of CSI-RS reports set includes：The metric is sent to base station；And from base Stand reception CSI-RS report set configuration signal, and according to the CSI-RS report set configuration signal come obtain CSI-RS report Set；Wherein, the CSI-RS reports set configuration signal includes the CSI-RS selected according to the metric base station Report the instruction of the CSI-RS forms in set.
It is highly preferred that the step of determining CSI feedback resource includes：CSI feedback resource allocation signaling is received from base station, it is described CSI feedback resource allocation signaling includes that the CSI feedback corresponding to the CSI-RS forms reported with the CSI-RS in set is provided The instruction in source；CSI feedback resource is determined according to the CSI feedback resource allocation signaling for being received.
Preferably, obtaining the step of CSI-RS reports set includes：According to the metric, from CSI-RS measurements CSI-RS is selected to report set in set.
It is highly preferred that the step of determining CSI feedback resource includes：CSI-RS is sent to base station report set notice signaling, The CSI-RS reports set notice signaling includes reporting the CSI-RS of user equipment selection the instruction of set；Received from base station CSI feedback resource allocation signaling, the CSI feedback resource allocation signaling includes couple CSI- reported with the CSI-RS in set The instruction of the corresponding CSI feedback resource of RS forms；And CSI is determined according to the CSI feedback resource allocation signaling for being received Feedback resources.
Preferably, the CSI-RS measuring assemblies configuration signal also includes the instruction to can use CSI feedback resource.
It is highly preferred that the step of determining CSI feedback resource includes：According to the instruction to can use CSI feedback resource, it is determined that with The CSI-RS reports the corresponding CSI feedback resource of CSI-RS forms in set；Methods described also includes：Sent to base station CSI feedback resource notification signaling, the CSI feedback resource notification signaling includes the instruction to identified CSI feedback resource.
A kind of alternative plan of the invention, it is proposed that user equipment, including：Receiving unit, channel is received from base station State information reference signals CSI-RS measuring assembly configuration signals, the CSI-RS measuring assemblies configuration signal is included for described The instruction of the CSI-RS measuring assemblies of user device configuration；Measuring unit, according to the CSI-RS measuring assemblies that receiving unit is received Instruction, the CSI-RS in the CSI-RS measuring assemblies is measured, with obtain with the CSI-RS measuring assemblies The corresponding metric of CSI-RS forms；Set obtaining unit is reported, CSI-RS is obtained and is reported set, the CSI-RS is reported Set is, according to the metric, to be selected from the CSI-RS measuring assemblies；Feedback resources determining unit, it is determined that with remittance The CSI feedback resource for reporting the CSI-RS forms in the CSI-RS report set of set obtaining unit acquisition corresponding；And send Unit, the CSI feedback resource determined using feedback resources determining unit is reported in gathering to base station feedback with the CSI-RS The corresponding CSI of CSI-RS forms.
Preferably, the metric include it is following at least one：Channel quality indicator (CQI), pre-coding matrix instruction PMI, reference signal receive energy RSRP and Reference Signal Received Quality RSRQ.
Preferably, transmitting element is additionally configured to, and the metric is sent to base station；Receiving unit is also configured To receive CSI-RS from base station and reporting set configuration signal；And report set obtaining unit is configured as, according to receiving unit The CSI-RS of reception reports set configuration signal to obtain CSI-RS report set；Wherein, the CSI-RS reports set configuration Signaling includes that the CSI-RS selected according to the metric base station reports the instruction of the CSI-RS forms in set.
It is highly preferred that receiving unit is additionally configured to, CSI feedback resource allocation signaling, the CSI feedback are received from base station Resource allocation signaling includes the finger of the CSI feedback resource corresponding to the CSI-RS forms reported with the CSI-RS in set Show；Feedback resources determining unit is configured as, anti-to determine CSI according to the CSI feedback resource allocation signaling that receiving unit is received Feedback resource.
Preferably, report set obtaining unit to be configured as, according to the metric, from the CSI-RS measuring assemblies Middle selection CSI-RS reports set.
It is highly preferred that transmitting element is additionally configured to, sending CSI-RS to base station reports set notice signaling, the CSI- RS reports set notice signaling includes reporting the CSI-RS of user equipment selection the instruction of set；Receiving unit is also configured For, from base station receive CSI feedback resource allocation signaling, the CSI feedback resource allocation signaling include pair with the CSI-RS converge Report the instruction of the corresponding CSI feedback resource of the CSI-RS forms in set；And feedback resources determining unit is configured as, root Determine CSI feedback resource according to the CSI feedback resource allocation signaling of receiving unit reception.
Preferably, the CSI-RS measuring assemblies configuration signal also includes the instruction to can use CSI feedback resource.
It is highly preferred that feedback resources determining unit is configured as, according to the instruction to can use CSI feedback resource, it is determined that with The CSI-RS reports the corresponding CSI feedback resource of CSI-RS forms in set；Transmitting element is additionally configured to, to base station CSI feedback resource notification signaling is sent, the CSI feedback resource notification signaling includes what feedback resources determining unit was determined The instruction of CSI feedback resource.
A kind of third program of the invention, it is proposed that CSI back method, comprises the following steps： For user device configuration channel state information reference signals CSI-RS measuring assemblies, the CSI-RS measuring assemblies include described The CSI-RS forms that user equipment to be measured；CSI-RS measuring assembly configuration signals are sent to user equipment, the CSI-RS is surveyed Duration set configuration signal includes the instruction of configured CSI-RS measuring assemblies；Obtain CSI-RS and report set, wherein, it is described It is the degree that the CSI-RS in the CSI-RS measuring assemblies is measured and obtained according to user equipment that CSI-RS reports set Amount information, selects from the CSI-RS measuring assemblies；It is determined that reporting the CSI-RS form phases in set with the CSI-RS Corresponding CSI feedback resource；And receive corresponding with the CSI-RS forms in CSI-RS report set from user equipment CSI feedback.
Preferably, the metric include it is following at least one：Channel quality indicator (CQI), pre-coding matrix instruction PMI, reference signal receive energy RSRP and Reference Signal Received Quality RSRQ.
Preferably, obtaining the step of CSI-RS reports set includes：The metric is received from user equipment；According to institute Metric is stated, selects CSI-RS to report set from the CSI-RS measuring assemblies；Methods described also includes：To user equipment Send CSI-RS and report set configuration signal；Wherein, the CSI-RS reports set configuration signal and includes to selected CSI- RS reports the instruction of the CSI-RS forms in set.
Preferably, obtaining the step of CSI-RS reports set includes：CSI-RS is received from user equipment report set notice Signaling, the CSI-RS reports set notice signaling to be included surveying user equipment according to the metric, from the CSI-RS The CSI-RS selected in duration set reports the instruction of set；Described in being obtained according to CSI-RS reports set notice signaling CSI-RS reports set.
Preferably, the step of determining CSI feedback resource includes：It is determined that reporting the CSI-RS lattice in set with the CSI-RS The corresponding CSI feedback resource of formula；Methods described also includes：CSI feedback resource allocation signaling is sent to user equipment, it is described CSI feedback resource allocation signaling includes the instruction to identified CSI feedback resource.
Preferably, the CSI-RS measuring assemblies configuration signal also includes the instruction to can use CSI feedback resource.
It is highly preferred that the step of determining CSI feedback resource includes：CSI feedback resource notification signaling is received from user equipment, The CSI feedback resource notification signaling includes that the CSI corresponding to the CSI-RS forms reported with the CSI-RS in set is anti- Present the instruction of resource, the CSI feedback resource is user equipment according to pair can indicating determine with CSI feedback resource；Root Determine CSI feedback resource according to the CSI feedback resource notification signaling.
A kind of fourth program of the invention, it is proposed that base station, including：Measuring assembly dispensing unit, sets for user Standby configurating channel state information reference signals CSI-RS measuring assemblies, the CSI-RS measuring assemblies will including the user equipment The CSI-RS forms of measurement；Transmitting element, CSI-RS measuring assembly configuration signals, the CSI-RS measurements are sent to user equipment Set configuration signal includes the instruction of the CSI-RS measuring assemblies of CSI-RS measuring assembly configuration of described dispensing unit；Set is reported to obtain Unit, obtains CSI-RS and reports set, wherein, it is that the CSI-RS is measured according to user equipment that the CSI-RS reports set The metric that CSI-RS in set is measured and obtained, selects from the CSI-RS measuring assemblies；Feedback resources Determining unit, it is determined that the CSI corresponding with the CSI-RS forms reported in the CSI-RS report set that set obtaining unit is obtained Feedback resources；And receiving unit, receive the CSI-RS forms reported with the CSI-RS in set from user equipment corresponding CSI feedback.
Preferably, the metric include it is following at least one：Channel quality indicator (CQI), pre-coding matrix instruction PMI, reference signal receive energy RSRP and Reference Signal Received Quality RSRQ.
Preferably, receiving unit is additionally configured to, and the metric is received from user equipment；Report set obtaining unit It is configured as, according to the metric, selects CSI-RS to report set from the CSI-RS measuring assemblies；Transmitting element is also It is configured as, sending CSI-RS to user equipment reports set configuration signal；Wherein, the CSI-RS reports set configuration signal Instruction including reporting the CSI-RS for reporting set obtaining unit selection the CSI-RS forms in set.
Preferably, receiving unit is additionally configured to, and receiving CSI-RS from user equipment reports set notice signaling, described CSI-RS reports set notice signaling to be included selecting user equipment according to the metric, from the CSI-RS measuring assemblies The CSI-RS for selecting reports the instruction of set；Report set obtaining unit to be configured as, the CSI-RS received according to receiving unit converges Report set notice signaling is gathered to obtain CSI-RS and report.
Preferably, feedback resources determining unit is configured as, it is determined that reporting the CSI-RS lattice in set with the CSI-RS The corresponding CSI feedback resource of formula；Transmitting element is additionally configured to, and CSI feedback resource allocation signaling, institute are sent to user equipment Stating CSI feedback resource allocation signaling includes the instruction of the CSI feedback resource determined to feedback resources determining unit.
Preferably, the CSI-RS measuring assemblies configuration signal also includes the instruction to can use CSI feedback resource.
It is highly preferred that receiving unit is configured as, CSI feedback resource notification signaling is received from user equipment, the CSI is anti- Feedback resource notification signaling includes the finger of the CSI feedback resource corresponding to the CSI-RS forms reported with the CSI-RS in set Show, the CSI feedback resource is user equipment according to pair being determined with the instruction of CSI feedback resource；Feedback resources determine Unit is configured as, and CSI feedback resource is determined according to the CSI feedback resource notification signaling that receiving unit is received.
Brief description of the drawings
By illustrating the preferred embodiments of the present invention below in conjunction with the accompanying drawings, above and other purpose of the invention, spy will be made Advantage of seeking peace is clearer, wherein：
Fig. 1 shows the schematic diagram of example application scenarios of the invention；
Fig. 2 shows the schematic block diagram of user equipment of the invention；
Fig. 3 shows the schematic block diagram of base station of the invention；
Fig. 4 shows the flow chart of channel state information feedback method according to embodiments of the present invention；And
Fig. 5 shows the flow chart of channel state information feedback method according to another embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings to a preferred embodiment of the present invention will be described in detail, eliminate in the course of the description for this It is unnecessary details and function for invention, to prevent the understanding of the present invention from causing to obscure.
In order to be clearly set forth in it is of the invention realize step, some specific embodiments of the invention are given below, fit For LTE-A (Rel-10, Rel-11 and later version) cellular communication system.It should be noted that the invention is not restricted to reality Apply the application described in example, and can be applied to other communication systems, such as 5G systems from now on.
Fig. 1 shows an example under the scene 4 that can be applied in LTE Rel-11 networks of the invention.This area skill Art personnel will recognize, application scenarios of the invention are not limited to scene 4, but including all fields in CoMP technical scopes Scape, as described below, the also degeneration scene including CoMP.In scene 4, the covering of macro cell base station 101 is lower three distributions Formula RRH, respectively RRH102, RRH103 and RRH104.This four biographies of macro cell base station 101, RRH102, RRH103 and RRH104 Defeated point possesses identical cell ID, but is each configured with different CSI-RS forms, respectively CSI-RS forms 0, CSI-RS Form 1, CSI-RS forms 2 and CSI-RS forms 3.Although the CSI-RS forms of different transfer point configurations are different in Fig. 1, real The CSI-RS forms of different transfer points can be with identical in the communication process of border.Here have two kinds of situations, one kind be physically separate compared with The RRH transfer points of good (signal between transfer point will not be interfered with each other) can be multiplexed identical CSI-RS forms, to save The occupancy of CSI-RS forms, the CSI-RS ports (Port) corresponding to the antenna of different transfer points can be with identical here；It is another It is that several transfer points of (signal between transfer point can be interfered with each other) physically closer to the distance can also use identical CSI-RS forms, the CSI-RS ports corresponding to the antenna of different transfer points can be with identical or different here.Different transfer points CSI-RS ports corresponding to antenna can reduce the number of user equipment visible transfer point when identical, increase SFN (single-frequency Net) coverage effect while reduce network complexity.When CSI-RS ports corresponding to the antenna of different transfer points are different, no A transfer point for possessing more antennas can be altogether constituted with the antenna of transfer point, is beneficial to increase spatial degrees of freedom.Example Such as, two transmission points possess 4 antennas respectively, and using identical CSI-RS forms, but CSI-RS ports take 1~4 respectively With 5~8, the logical transport point that antenna number is 8 is then may be constructed.The logical point is considered as with the mode of telex network It is a big MIMO (multiple-input and multiple-output), is also called network MIMO transmission means.Following discussion is to above-mentioned these situations Also should be applicable.
For example, user equipment 105 can be configured with CSI-RS forms 0, i.e., only carried by macro cell base station equipment 101 For service.If the user equipment before the user equipment is LTE Rel-11 (not including Rel-11), the LTE Rel-11 Base station and the user equipment between basic communication method have three kinds：
One kind assumes that the user equipment is Rel-10 user equipmenies, and base station configuration user equipment uses transmission mode 9, i.e., 8 layers of (1ayer) transmission mode.Under the transmission mode, the measurement result of the upward signal according to the user equipment is determined in base station The transfer point (macro cell base station transfer point or RRH transfer points) of the fixed and user device association, and the transfer point is corresponding CSI-RS forms are allocated to the user equipment.User equipment, will channel shape corresponding with transmission mode by measuring the CSI-RS State feedback of the information is to base station.Base station by the PDCCH that is demodulated based on CRS (public reference signal), by descending distribution information transmission To user equipment (this signal by all transfer points with SFN by way of be transmitted), user equipment by descending SFN it is soft Merge and obtain the distribution information.Base station will be sent by the transfer point of above-mentioned association and be demodulated based on DM-RS (demodulated reference signal) PDSCH to user equipment.This communication means can obtain space reuse (Spatial Reuse) gain.
Second communication means is the communication mode of compatible LTE Rel-8/9, i.e. the descending control letter based on CRS demodulation Order, including PCFICH (Physical Control Format Indicator Channel), PHICH (physical mixed automatic re-transmission indicating channel), PDCCH and CRS in itself, is all sent by way of similar SFN from all transfer points, and user equipment receives control by SFN soft merging modes Signaling processed and by measuring CRS come feeding back channel state information.Base station equipment is incited somebody to action by with above-mentioned control signaling identical mode PDSCH based on CRS demodulation is sent to user equipment.This communication mode cannot obtain space reuse gain.
The third communication means is the communication mode method of compatible LTE Rel-8/9 and the specific DM-RS of use user equipment, Such as Rel-8 transmission modes 7, Rel-9 transmission modes 8 etc..The method between first two method, the difference with first method It is that the acquisition of CSI can only be realized by CRS, is that DM-RS can be used in PDSCH transmission with the difference of second method, because This can also obtain space reuse gain.
In these three communication modes, the upward signal soft merging that base station is all received by all transfer points is to obtain use Family equipment is sent to the signal of base station.
The LTE system of (including Rel-11) is introduced into new CoMP communication method after Rel-11, with above-mentioned communication means It is different.By taking the Rel-11 user equipmenies 107 of the use CoMP communication method in Fig. 1 as an example, the up letter of the user equipment Number can be included base station equipment 101 and RRH102,103 and 104 receives in 4 interior transfer points, therefore base station equipment 101 The CSI-RS measuring assemblies of the user equipment 107 can be configured to include CSI-RS forms 0~3.User equipment 107 it is specific The step of realization and its communication means with network side, will be in following discussion.Hereinafter will not be described in detail incoherent with the present invention Initial access process in details, such as user equipment 107 in component, the communication process unrelated with present inventive concept and initially connect Process communicated with LTE Rel-8/9/10 compatibility modes after entering etc..
Fig. 2 shows the schematic block diagram of user equipment of the invention (such as user equipment 107).The user equipment bag Include：Receiving unit 210, measuring unit 220, report set obtaining unit 230, feedback resources determining unit 240 and transmission are single Unit 250.It will be understood by those skilled in the art that the user equipment also includes realizing other functions unit necessary to its function, such as Various processors, memory etc..
Fig. 3 shows the schematic block diagram of base station of the invention (such as base station 101).The base station includes：Transmitting element 310th, measuring assembly determining unit 320, report set obtaining unit 330；Feedback resources determining unit 340 and receiving unit 350.It will be understood by those skilled in the art that the base station equipment also includes realizing other functions unit necessary to its function, it is such as each Plant processor, memory etc..
The concrete function of the component of user equipment of the invention and base station is specifically described referring to Fig. 2 and Fig. 3 And operation.
The measuring assembly dispensing unit 320 of base station is configured as, for user device configuration channel condition information with reference to letter Number CSI-RS measuring assemblies, the CSI-RS measuring assemblies include the user equipment CSI-RS forms to be measured.
In embodiment, the measuring assembly dispensing unit 320 of base station equipment can be up according to what is sent to user equipment The measurement result of signal, gives user device configuration CSI-RS measuring assemblies, and sent to user equipment by transmitting element 310 CSI-RS measuring assembly configuration signals, the CSI-RS measuring assemblies configuration signal includes the CSI-RS for user device configuration The instruction of measuring assembly.Specifically, macro cell base station equipment and distribution RRH equipment can be received by respective day line computation The intensity of the various upward signals (such as PUCCH, SRS, PUSCH etc.) that the user equipment for arriving sends, the measurement collection in base station equipment After conjunction determining unit 320 processes these information, the transfer point (macrocell of user equipment measurement will be needed by transmitting element 310 The transfer point of base station equipment and/or RRH equipment, or logic) the information such as CSI-RS forms it is proprietary by user equipment RRC signaling (i.e. CSI-RS measuring assemblies configuration signal) be sent to user equipment.
Specifically, the measuring assembly determining unit 320 of base station can be configured as：It is determined that needing the biography that user equipment is measured Defeated point；It is determined that the transmission mode that can be provided for user equipment by these transfer points and corresponding feedback model；And determine The CSI-RS forms of these transfer points.
The intensity of the upward signal of the user equipment that measuring assembly determining unit 320 can be received according to different transfer points Come the transfer point for determining to need user equipment to measure.By the thresholding lower bound of setting signal intensity, can exclude first The very poor transfer point of received signal strength, to reduce the burden of user equipment measurement.It is remaining to receive signal transmission good enough Point constitutes primary election measuring assembly.
If the upward signal of user equipment can accurately reflect user's equipment downward channel conditions, can be in primary election Further determined that on the basis of measuring assembly and carefully select measuring assembly.For example, if it find that only base station equipment/some RRH can Receive the upward signal of the good user equipment of intensity；Or base station equipment/some RRH is received than other any transfer points The uplink signal strength of user equipment will be well a lot, then carefully selecting should be only comprising the base station equipment/RRH in measuring assembly.And example Such as, if it is possible to receive the transfer point more than one of fine user equipment upward signal, then carefully select the measuring assembly should be comprising this A little transfer points.
Next, measuring assembly determining unit 320 determines to be provided for user equipment by transfer point determined above Transmission mode and corresponding feedback model.If carefully selecting only one of which transfer point in measuring assembly, user can be configured and set It is standby to use non-CoMP transmission pattern.If the transfer point is base station equipment, the transmission mode of the user equipment can be according to preceding The communication means of the user equipment 105 stated is configured.If the transfer point is some RRH, user equipment can be configured Using transmission mode 9 etc..
If the thin transfer point more than one selected in measuring assembly, measuring assembly determining unit 320 can be more different The intensity of the user equipment upward signal that transfer point is received.It is smaller if up signal strength differences, then these can be passed Defeated point constitutes a logical transport point, and using network MIMO transmission means, configuration user equipment uses transmission mode 9；If on Row signal strength differences are larger, then can configure user equipment using the corresponding transmission mode of CoMP transmission mode (but due to Transmission mode 9 itself can also support CoMP transmission mode, therefore can be configured as transmission mode 9).
Above-mentioned network MIMO is to a greater extent feedback model with the difference of CoMP transmission mode.Network MIMO with it is foregoing The feedback model of single transfer point is identical, only the corresponding CSI of one transfer point of feedback, and CoMP will then feed back multiple transmission point correspondence CSI.
Then, measuring assembly determining unit 320 determines the CSI-RS forms of transfer point determined above.If thin choosing measurement Only one of which transfer point and be base station equipment in set, then the CSI-RS forms of the transfer point are exactly base station equipment service Rel- The CSI-RS forms of 10 user equipmenies.Select in measuring assembly only one of which transfer point and be RRH if thin, the transfer point CSI-RS forms are specific one CSI-RS forms of the transfer point.If the thin transfer point more than one selected in measuring assembly, Corresponding CSI-RS forms are then determined according to the transmission means for being configured.If transmission means is network MIMO, CSI-RS Form only one of which, the antennal interface of different transfer points is corresponding from the different CSI-RS ports in the CSI-RS forms respectively, This can be with flexible configuration.Such as two transmission points are each to have 4 antennas by oneself, then can have 8 CSI- in the CSI-RS forms for configuring RS ports, its middle port 1 to 4 distributes to a transfer point, and another transfer point is distributed in port 5 to 8.Can certainly configure There are 4 CSI-RS ports in CSI-RS forms, its middle port 1 to 2 distributes to a transfer point, and another is distributed in port 3 to 4 Transfer point.But this assigning process is transparent for user equipment, from terms of user equipment angle, network MIMO transmission side Formula merchandiser transfer point transmission means is not different.If transmission means is CoMP, different transfer points has respective transfer point special Fixed CSI-RS forms.The CSI-RS port numbers of different transfer points can be with identical or different.
It is then possible to the CSI- that the transmitting element 310 for passing through base station determines measuring assembly dispensing unit 320 as described above RS measuring assemblies and relevant parameter are sent to user equipment.
The transmitting element 310 of base station is configured as sending CSI-RS measuring assembly configuration signals to user equipment, described CSI-RS measuring assemblies configuration signal includes the instruction of the CSI-RS measuring assemblies of the configuration of measuring assembly dispensing unit 320.Accordingly Ground, the receiving unit 210 of user equipment is configured as receiving CSI-RS measuring assembly configuration signals from base station.
Specifically, CSI-RS measuring assemblies configuration signal is configured with the CSI-RS measuring assemblies of user equipment, and the signaling can With including one or more in following information：
The number N of the CSI-RS forms in CSI-RS measuring assemblies；
CSI-RS reports the number M of the CSI-RS forms in set；
The form of the CSI-RS of each measurement, including the 1) sequence of CSI-RS, 2) antenna opening quantity, 3) CSI-RS is one Time-frequency location in individual subframe, cycle, sub-frame offset, 4) data and CSI-RS EPRE (power is per Resource Unit) ratio；Each Need PDSCH mourn in silence (muting) CSI-RS form, including time-frequency locations of the CSI-RS in a subframe, the cycle, Sub-frame offset etc.；
The transmit power of the corresponding RRH equipment of CSI-RS；The CRS EPRE ratios of the corresponding RRH equipment of CSI-RS：
Setover relatedly (Association Offset) of the corresponding transfer points of CSI-RS, etc..
, wherein it is desired to the CSI-RS that PDSCH mourns in silence corresponds to the CSI-RS forms that other transfer points are used, user equipment PDSCH need vacated on the position of these CSI-RS, to avoid interference of the data to reference signal.Above-mentioned last three Can be used for aiding in accurate uplink power control and report the selection of set.Wherein Setover relatedly is used to determine covering for transfer point Lid scope, is similar to cell range extension biasing (Cell Range Expansion Offset) of the prior art (referring to R1- 100810, Cell association analysis in outdoor Hotzone of heterogeneous Networks, Huawei).
Certainly, all or part of above-mentioned CSI-RS measuring assemblies configuration signal can be via RRC signaling, the signaling of layer 1, layer 2 signalings etc. or its combination are sent to user equipment.
Additionally, following information can match somebody with somebody together with CSI-RS measuring assembly configuration signals or as CSI-RS measuring assemblies A part for confidence order, is received by the transmitting element 310 of base station to user equipment and by the receiving unit 210 of user equipment：
Transmission mode and feedback model that user equipment is used；
The instruction of CSI feedback resource, such as resource indication information or periodicity or aperiodic of periodicity PUCCH resource can be used Property the resource indication information of PUSCH resources etc., can be identical with N or M, etc. with the quantity of CSI feedback resource.
It should be noted that needing the lower choosing (down-select) in CSI-RS measuring assemblies to go out a subset in both cases Reported as CSI-RS and gathered, one is that measuring assembly determining unit 320 cannot be surveyed based on the thin choosing of user equipment upward signal acquisition Duration set is reported set and is used as CSI-RS, and another is that measuring assembly determining unit 320 cannot obtain sufficiently small thin choosing Measuring assembly is reported set and is used as CSI-RS.Therefore, it is also desirable to it is extra it is lower select process, this process assumes measuring assembly Determining unit 320 determines the CSI-RS forms of N number of transfer point and notifies to user equipment, and assumes CSI-RS measuring assemblies Each CSI-RS form corresponds to a transfer point (being probably logical transport point).Due to transfer point and CSI-RS forms one by one Correspondence, it is in the following description, sometimes corresponding using transfer point and transfer point without distinction on the premise of it will not obscure CSI-RS forms.Additionally, due to need it is extra it is lower select process, in the operation of measuring assembly determining unit 320, configuration transmission Pattern, feedback model and feedback resources not necessarily, therefore in following description, if being related to transmission mode, feedback mould The configuration of formula and feedback resources, it assumes that previous measuring assembly dispensing unit is not configured to corresponding object.
Here, CSI-RS reports set can be with identical (i.e. N=M), now user equipment report with CSI-RS measuring assemblies Sequencing that the order of CSI can be notified according to CSI-RS in measuring assembly determines.And generally, work as CSI-RS Report the subset (M that set is CSI-RS measuring assemblies<Signalling exchange is needed when N), between user equipment and base station to realize Report the selection of set.This will be discussed in more detail below.
As described above, the receiving unit 210 of user equipment from base station receive CSI-RS measuring assembly configuration signals, and by its It is supplied to measuring unit 220 to be further processed.
The measuring unit 220 of user equipment is configured as, the finger of the CSI-RS measuring assemblies received according to receiving unit 210 Show, the CSI-RS in the CSI-RS measuring assemblies is measured, to obtain and the CSI- in the CSI-RS measuring assemblies The corresponding metric of RS forms.
In embodiment, the metric that measuring unit 220 is obtained can include short-term information and statistical information.This area Technical staff will recognize, can also use other metrics in addition to both metrics.Short-term information includes base CQI (channel quality instruction), the PMI of acquisition are calculated under Closed-Loop Spatial Multiplexing hypothesis in the channel that certain CSI-RS is measured (pre-coding matrix instruction) etc., also including measuring calculated RSRP (reference signal reception energy) based on certain CSI-RS, RSRQ (Reference Signal Received Quality) etc..The calculating of RSRP/RSRQ when the calculating of RSRP/RSRQ is similar to switching known in the art Method, simply replaces original measured signal CRS with CSI-RS, and make appropriate proportional zoom.Statistical information can lead to The multiple CSI-RS of continuous measurement different time is crossed to obtain.It is multiple in closed loop space after repeatedly the channel matrix of measurement acquisition is average CQI, PMI of statistics etc. can be obtained with lower calculating of hypothesis.Repeatedly RSRP, RSRQ of measurement can be using similar TS36.300 the 10.6 section (TS36.300V10.0.0, Overall description；Stage2,3GPP) E-UTRAN measurement models, obtain The 1 and filtered statistics RSRP and RSRQ of layer 3 of layer.
Next, user equipment and base station obtain CSI-RS by sequence of operations and Signalling exchange reports set, institute It is, according to above-mentioned metric, to be selected from the CSI-RS measuring assemblies to state CSI-RS and report set.Additionally, user equipment Determine to report the CSI-RS form phases in set with the CSI-RS for being obtained by sequence of operations and Signalling exchange with base station Corresponding CSI feedback resource.These operations are to determine list by the report set obtaining unit 230, feedback resources of user equipment Report set obtaining unit 330, the feedback resources determining unit 340 of unit 240 and base station below describe specifically to show come what is realized Example explains the concrete operations of these units and the Signalling exchange between user equipment and base station.
(example 1)
In this example, the report set obtaining unit 230 of user equipment can be with receiving unit 210 and transmitting element 250 cooperations are gathered to obtain CSI-RS and report.In this case, the transmitting element 250 of user equipment can be configured as, The metric that measuring unit 220 is obtained is sent to base station.Correspondingly, the receiving unit 350 of base station can be configured as, from User equipment receives the metric.
Specifically, the transmitting element 250 of user equipment can be by the PUCCH of layer 1 or aperiodic PUSCH, or layer 2 Metric is sent to base station equipment by MAC signalings, or the combination of the RRC signaling or above-mentioned signaling of layer 3.Multiple CSI-RS forms Corresponding metric can according to measuring assembly notify order join end to end combined coding constitute a data block converge together Offer base station equipment, it is also possible to separately encoded after respective flag information is added, base station equipment is reported on demand.The former is applied to Aperiodic PUSCH, MAC signaling and RRC signaling, the latter are applied to aperiodic PUSCH, PUCCH signaling, MAC signalings and RRC letter Order.If sending metric using aperiodic PUSCH, aperiodic PUSCH resources can be by base station by RRC signaling point Match somebody with somebody, it is also possible to distributed by the uplink assignment of dynamic dispatching, and this distribution is received by receiving unit.If believed using MAC Order or RRC signaling send metric, then the signaling can periodically send, it is also possible to according to passing through RRC signaling in advance The thresholding trigger-type ground of definition sends.For example when the corresponding RSRP of some CSI-RS form exceedes a certain thresholding, Yong Hushe It is standby to be notified the metric relevant with the CSI-RS forms to base station equipment by transmitting element 250.
Here, in above-mentioned M<In the case of N, it is preferable that it is individual best that the transmitting element 250 of user equipment can only feed back M The corresponding metric of CSI-RS forms to base station equipment.Here can be preferably best in signal intensity meaning, also may be used To be best in space channel orthogonality meaning, i.e., orthogonality is best between the PMI that M CSI-RS measurement is obtained.
Note, the transmission of above-mentioned metric can be saved in a tdd system.Base station equipment and RRH equipment in TDD system Descending CSI can be obtained using channel reciprocity by the uplink SRS signal for receiving, be used to determine that CSI-RS reports set.
The report set obtaining unit 330 of base station equipment can be configured as, and be surveyed based on the CSI-RS that user equipment sends The corresponding metric of CSI-RS forms in duration set, alternatively with the base station equipment corresponding to each CSI-RS forms and/or The dispatch state of RRH is combined, and determines may finally to be the transfer point of user equipment service, that is to say that user equipment needs specific Feed back the transfer point of CSI.
In this case, the operation of set obtaining unit 330 is reported similar to measuring assembly determining unit 320.Report Set obtaining unit 330 is configured as：It is determined that needing user equipment to report the transfer point of CSI；It is determined that can by these transfer points With the transmission mode provided for user equipment and corresponding feedback model；And determine the CSI- for needing user equipment to report CSI RS forms.
Specifically, the metric of the different transfer points that set obtaining unit 330 can be reported according to user equipment is reported To determine the transfer point for needing user equipment to report CSI.For example, if it find that only base station equipment/some RRH is corresponding The metric (RSRP/RSRQ or CQI) that the measurement of CSI-RS forms is obtained is sufficiently strong；Or base station equipment/some RRH is than other The metric (RSRP/RSRQ or CQI) that the corresponding CSI-RS forms measurement of any transfer point is obtained will be many by force, then report Base station equipment/the RRH should be only included in set.In another example, if possess very intensive quantity information (RSRP/RSRQ or CQI transfer point more than one), then reporting set should include these transfer points.Again for example, in above-mentioned very intensive quantity information In the transfer point of (RSRP/RSRQ or CQI), further choose one group of best transfer point of PMI intercepts and gather as report.Also For example, using base station equipment and/or the dispatch state of RRH on the basis of above-mentioned selection, by the transfer point that business is very busy Removed from set is reported.
The sufficiently strong method of above-mentioned judgement metric (RSRP/RSRQ or CQI) be by by above-mentioned metric with it is pre- Determine thresholding (similar to handoff procedure of the prior art) and be compared to what is realized, and also foregoing cell range can be expanded Exhibition biasing is accounted for (similar to the handoff procedure under heterogeneous network environment in the prior art) in the lump.
Next, report set obtaining unit 330 to determine to be provided for user equipment by transfer point determined above Transmission mode and corresponding feedback model.If reporting only one of which transfer point in set, user equipment can be configured and adopted With non-CoMP transmission pattern.If the transfer point is base station equipment, the transmission mode of the user equipment can be according to foregoing The communication means of user equipment 105 is configured.If the transfer point is some RRH, user equipment use can be configured Transmission mode 9 etc..If reporting the transfer point more than one in set, reporting set obtaining unit 330 can be more different The intensity (RSRP/RSRQ or CQI) of the metric of transfer point.If intensity difference is smaller, can be by these transfer point structures Into a logical transport point, using network MIMO transmission means, configuration user equipment uses transmission mode 9；If intensity difference It is larger, then can configure user equipment using the corresponding transmission mode of CoMP transmission mode (but due to transmission mode 9 itself CoMP transmission mode can be supported, therefore can be configured as transmission mode 9).
Above-mentioned network MIMO is to a greater extent on feedback model with the difference of CoMP transmission mode.Network MIMO with it is preceding The feedback model of the single transfer point in face is identical, only the corresponding CSI of one transfer point of feedback, and CoMP will then feed back multiple transmission point pair The CSI for answering.
Then, reporting the set determination of obtaining unit 330 needs user equipment to report the CSI-RS forms of the transfer point of CSI. If reporting only one of which transfer point and be base station equipment in set, the CSI-RS forms of the transfer point are exactly base station equipment Service the CSI-RS forms of Rel-10 user equipmenies.If reporting only one of which transfer point and be RRH in set, the transmission The CSI-RS forms of point are specific one CSI-RS forms of the transfer point.If reporting the transfer point more than one in set, Corresponding CSI-RS forms are then determined according to the transmission means for being configured.If transmission means is network MIMO, CSI-RS Form only one of which, the antennal interface of different transfer points is corresponding from the different CSI-RS ports in the CSI-RS forms respectively, This can be with flexible configuration.Such as two transmission points are each to have 4 antennas by oneself, then can have 8 CSI- in the CSI-RS forms for configuring RS ports, its middle port 1 to 4 distributes to a transfer point, and another transfer point is distributed in port 5 to 8.Can certainly configure There are 4 CSI-RS ports in CSI-RS forms, its middle port 1 to 2 distributes to a transfer point, and another is distributed in port 3 to 4 Transfer point.But this assigning process is transparent for user equipment, from terms of user equipment angle, network MIMO transmission side Formula merchandiser transfer point transmission means is not different.If transmission means is CoMP, different transfer points has respective transfer point special Fixed CSI-RS forms.The CSI-RS port numbers of different transfer points can be with identical or different.
As can be seen that being allocated in CSI-RS measuring assemblies in the CSI-RS forms of user equipment and CSE-RS report set The CSI-RS forms for being allocated to user may be different, and CSI-RS forms are also possible to difference with the corresponding relation of transfer point, this Can be configured flexibly the CSI-RS forms of logical transport point by base station to realize a bit.For user equipment, it is seen that only It is the CSI-RS forms for needing to measure or measure and report, rather than transfer point.
In other words, the report set obtaining unit 330 of base station is configured as, according to the metric for receiving, from CSI- CSI-RS is selected to report set in RS measuring assemblies.Then, the transmitting element 310 of base station sends CSI-RS and reports to user equipment Set configuration signal；Wherein, the CSI-RS reports set configuration signal and includes to reporting the set selection of obtaining unit 330 CSI-RS reports the instruction of the CSI-RS forms in set.
The content that CSI-RS reports set configuration signal can be including one or more in following information：
Report set in CSI-RS forms number M ', M ' can with indicated by CSI-RS measuring assembly configuration signals M is identical or different, so can for greater flexibility also more accurately instruction user equipment need feed back CSI CSI-RS forms number Amount；
The information of the individual CSI-RS forms of M ', if these forms are present in indicated by CSI-RS measuring assembly configuration signals Measuring assembly among, then only need to sequence number by it in measuring assembly and indicate, if increasing CSI-RS forms newly (such as user equipment by the CSI-RS forms of transfer point that other approach are known or because logical transport point setting and occur The CSI-RS forms of change), then need specifically to indicate the specific form of these CSI-RS forms.
Additionally, following information can match somebody with somebody together with CSI-RS report set configuration signals or as CSI-RS report set A part for confidence order, is received by the transmitting element 310 of base station to user equipment and by the receiving unit 210 of user equipment：
Transmission mode and feedback model that user equipment is used；
The instruction of CSI feedback resource, such as resource indication information or periodicity or aperiodic of periodicity PUCCH resource can be used Property the resource indication information of PUSCH resources etc., can be identical with N or M, etc. with the quantity of CSI feedback resource.
Correspondingly, the receiving unit 210 of user equipment can be configured as, and receiving CSI-RS from base station reports set configuration Signaling, wherein, the CSI-RS reports set configuration signal includes the CSI-RS selected according to the metric base station Report the instruction of the CSI-RS forms in set.
Then, the CSI-RS that the report set obtaining unit 230 of user equipment can be received according to receiving unit 210 is reported Set configuration signal is gathered to obtain CSI-RS and report.In other words, reporting set obtaining unit 230 can be according to the transmission of base station The signaling that unit 310 sends indicates to obtain CSI-RS report set.
Additionally, in this example, the feedback resources determining unit 340 of base station can be configured as, it is determined that with the CSI- RS reports the corresponding CSI feedback resource of CSI-RS forms in set.The transmitting element 310 of base station is additionally configured to, Xiang Yong Family equipment sends CSI feedback resource allocation signaling, and the CSI feedback resource allocation signaling is included to feedback resources determining unit The instruction of the 340 CSI feedback resources for determining.
Correspondingly, the feedback resources determining unit 240 of user equipment can cooperate with determining that CSI is anti-with receiving unit 210 Feedback resource.In this case, receiving unit 210 be can be additionally configured to, and CSI feedback resource allocation signaling is received from base station, The CSI feedback resource allocation signaling includes that the CSI corresponding to the CSI-RS forms reported with the CSI-RS in set is anti- Present the instruction of resource.
Specifically, CSI feedback resource allocation signaling can include and the number M ' phases for reporting the CSI-RS forms in set The configuration information of corresponding CSI feedback resource, the resource indication information or 1 periodicity of the individual periodicity PUCCH resources of such as M ' or The resource indication information of acyclic PUSCH resources；And the CSI obtained by the individual CSI-RS forms measurements of M ' is provided with CSI feedback Corresponding relation between source, when the CSI of combined coding is transmitted using PUCSH, from the CSI obtained by the measurement of different CSI-RS forms The instruction of the sequencing correlation in combined coding.
Correspondingly, the feedback resources determining unit 240 of user equipment can be configured as, and be received according to receiving unit 210 CSI feedback resource allocation signaling determine CSI feedback resource.
Being noted herein that above-mentioned CSI-RS reports set configuration signal and CSI feedback resource allocation signaling preferably can be with Realized using RRC signaling, but be also not excluded for the signaling using layer 1 and/or layer 2 or the signaling of different layers is used in combination come real It is existing.It should be noted that in practical implementations, above-mentioned CSI-RS reports set configuration signal and CSI feedback resource allocation signaling can be made Realized with identical or different RRC signaling, the signaling of layer 1, the signaling of layer 2 or its combination.If for example, CSI-RS measuring assemblies are matched somebody with somebody Confidence order is included and then can realize CSI-RS using the MAC COMMAND signalings of layer 2 with the instruction of CSI feedback resource Set configuration signal and CSI feedback resource allocation signaling are reported, to indicate the information and each of which of the individual CSI-RS forms of M ' The sequence number of resource used by the corresponding CSI feedback of CSI-RS forms in the instruction of above-mentioned available CSI feedback resource etc..And example Such as, it is possible to use the MAC COMMAND signalings of layer 2 come realize CSI-RS report set configuration signal, with indicate such as M ' it is individual Information of CSI-RS forms etc.；And using layer 3 RRC signaling rice realize CSI feedback resource allocation signaling, with indicate for example with M ' Corresponding information of CSI feedback resource of individual CSI-RS forms etc..
Additionally, an implementation method of MAC COMMAND signalings here is to reuse existing poly- in LTE Rel-10 carrier waves Carrier activation (activation) and closing (deactivation) signaling in conjunction, and member carrier therein is replaced with CSI-RS forms.
(example 2)
In this example, the report set obtaining unit 230 of user equipment can voluntarily determine that CSI-RS reports set. In this case, report set obtaining unit 230 to be configured as, according to the metric, from the CSI-RS measuring assemblies Middle selection CSI-RS reports set.
Specifically, the metric that set obtaining unit 230 is obtained according to measuring unit 220 is reported, determines that CSI-RS converges Report set.Determine that CSI-RS reports the concrete mode gathered and determines with the report set obtaining unit 330 of base station equipment in example 1 The mode that CSI-RS reports set is similar to, and differing only in CSI-RS and reporting set is determined at user equipment.
Correspondingly, the report set obtaining unit 330 of base station can cooperate with determining that CSI-RS converges with receiving unit 350 Report set.In this case, the receiving unit 350 of base station is additionally configured to, and receiving CSI-RS from user equipment reports set Notice signaling, the CSI-RS reports set notice signaling to be included to user equipment according to the metric, from the CSI- The CSI-RS selected in RS measuring assemblies reports the instruction of set.Then, the report set obtaining unit 340 of base station can basis The CSI-RS that receiving unit 350 is received reports set notice signaling to obtain CSI-RS report set.
In this example, the feedback resources determining unit 240 of user equipment can be with receiving unit 210 and transmitting element 250 cooperate with determining CSI feedback resource.In this case, the transmitting element 250 of user equipment can be configured as, Xiang Ji The transmission CSI-RS that stands reports set notice signaling, and the CSI-RS reports set notice signaling to be included to user equipment selection CSI-RS reports the instruction of set.Correspondingly, the receiving unit 350 of base station is additionally configured to, and CSI-RS is received from user equipment Report set notice signaling.
Specifically, the transmitting element 250 of user equipment reports set notice signaling by CSI-RS, will be to identified The instruction that CSI-RS reports set sends base station equipment to.CSI-RS reports set notice signaling can be including in following information One or more：
The number M ', M ' that CSI-RS reports the CSI-RS forms in set can be with CSI-RS measuring assemblies configuration signal institutes The M of instruction is identical or different；
The information of the individual CSI-RS forms of M ', if these forms are present in indicated by CSI-RS measuring assembly configuration signals Measuring assembly among, then only need to sequence number by it in measuring assembly and indicate, if increasing CSI-RS forms newly, Then need specifically to indicate the specific form of these CSI-RS forms.
Preferably, CSI-RS report set notice signaling can be realized by RRC signaling, but be not excluded for using layer 1 and/ Or the possibility of the signaling of layer 2.It is for instance possible to use being similar to the above-mentioned existing carrier activation in LTE Rel-10 carrier aggregations and closing The method of closed operation, realizes that the selection for reporting set is selected with cancellation using MACCOMMAND.
Preferably, CSI-RS is reported set notice signaling and can be realized using the MACCOMMAND of layer 2, the side of implementing Method can be using carrier activation in foregoing carrier aggregation and the implementation method closed.Certainly also mining is not used except layer 1 and/or layer 3 RRC signaling or each layer signaling joint notify method come realize CSI-RS report set notice signaling.If for example, using The PUCCH signalings of layer 1 realize that an implementation method is that the CSI-RS forms reported CSI-RS in set are measured in CSI-RS Corresponding sequence number in set is loaded into the interior perhaps signal that some CSI feedback resource is fed back by various methods, is passed through The detection of base station realizes that CSI-RS reports the notice of set indirectly.These methods include：By the corresponding sequence number of CSI-RS forms All or part of content combination with CSI feedback is encoded；By the sequence of the corresponding sequence number of CSI-RS forms and CSI feedback all or Partial content carries out code-scrambling operation；By the CSI feedback after the sequence of the corresponding sequence number of CSI-RS forms and all or part of coding Content carries out code-scrambling operation；The corresponding sequence number of CSI-RS forms is fed back as a part for CSI feedback content.For example The corresponding sequence number of CSI-RS forms and the RI combined codings of non-service cell, or the direct sequence number by CSI-RS can be replaced The RI of non-service cell feeds back to base station equipment.It is corresponding to realize that transmitting element 250 can be configured to aforesaid way Signaling and feedback.
At base station equipment, report set obtaining unit 330 and be configured as, according to the CSI-RS that receiving unit 350 is received Set notice signaling is reported to obtain CSI-RS report set.Then, as described above, the feedback resources determining unit 340 of base station The CSI feedback resource corresponding with the CSI-RS forms in CSI-RS report set can be determined.The transmitting element of base station 310 are additionally configured to, and CSI feedback resource allocation signaling is sent to user equipment, and it is right that the CSI feedback resource allocation signaling includes The instruction of the CSI feedback resource that feedback resources determining unit 340 determines.
Correspondingly, the receiving unit 210 of user equipment can be configured as, and CSI feedback resource distribution letter is received from base station Order, the CSI feedback resource allocation signaling includes the CSI corresponding to the CSI-RS forms reported with the CSI-RS in set The instruction of feedback resources.Specifically, as described in above example 1, CSI feedback resource allocation signaling can include and report set In CSI-RS forms the corresponding CSI feedback resources of number M ' configuration information, the money of the individual periodicity PUCCH resources of such as M ' The resource indication information of source configured information or 1 PUSCH resource periodically or non-periodically；And the individual CSI-RS forms of M ' are surveyed The corresponding relation between CSI and CSI feedback resource obtained by amount, when the CSI of combined coding is transmitted using PUCSH, with difference The related instruction of sequencings of the CSI in combined coding obtained by the measurement of CSI-RS forms.
Correspondingly, the feedback resources determining unit 240 of user equipment can be configured as, and be received according to receiving unit 210 CSI feedback resource allocation signaling determine to report the corresponding CSI feedback resource of CSI-RS forms in set with CSI-RS CSI feedback resource.
(example 3)
This example is with the difference of above-mentioned example 2, in this example, the feedback resources determining unit 240 of user equipment Voluntarily determine required CSI feedback resource.
In this example, as described above, being sent by the transmitting element 310 of base station and by the receiving unit 210 of user equipment The CSI-RS measuring assemblies configuration signal of reception includes the instruction to can use CSI feedback resource.
Therefore, the feedback resources determining unit 240 of user equipment can be configured as, according to available CSI feedback resource Instruction, it is determined that reporting the corresponding CSI feedback resource of CSI-RS forms in set with the CSI-RS.
In this case, the transmitting element 250 of user equipment can be additionally configured to, and sending CSI feedback to base station provides Source notice signaling, the CSI feedback resource notification signaling includes the finger of the CSI feedback resource determined to feedback resources determining unit Show.
Specifically, CSI feedback resource notification signaling can include reporting each the CSI-RS lattice in set with CSI-RS Sequence number in the instruction of available CSI feedback resource of the corresponding CSI feedback resource of formula in CSI-RS measuring assembly configuration signals.
The available CSI feedback resource indicated in CSI-RS measuring assembly configuration signals is enough, and for example quantity is identical with N, The correspondence pass that then can directly set up between corresponding sequence number of the CSI feedback resource with CSI-RS forms in CSI-RS measuring assemblies System, base station equipment by detect user equipment use CSI feedback resource come obtain CSI-RS report gather.
Correspondingly, the receiving unit 350 of base station is configured as, and CSI feedback resource notification signaling, institute are received from user equipment Stating CSI feedback resource notification signaling includes the CSI feedback corresponding to the CSI-RS forms reported with the CSI-RS in set The instruction of resource, the CSI feedback resource is user equipment according to pair being determined with the instruction of CSI feedback resource.Then, The feedback resources determining unit 340 of base station is anti-to determine CSI according to the CSI feedback resource notification signaling that receiving unit 350 is received Feedback resource.
The transmitting element 250 of user equipment is additionally configured to, the CSI feedback determined using feedback resources determining unit 240 Resource, to the base station feedback CSI corresponding with the CSI-RS forms in CSI-RS report set.Specifically, user equipment (for example using measuring unit 220) measurement CSI-RS reports the CSI of each the CSI-RS form in set, and is provided using feedback The CSI feedback resource that source determining unit 240 determines feeds back these CSI.Correspondingly, the receiving unit 350 of base station is from user equipment Receive the feedback of the corresponding CSI of the CSI-RS forms reported with the CSI-RS in set.
Although essentially describing function and operation of the user equipment under CoMP transmission mode above, however as described above, User equipment of the invention be not limited only under CoMP transmission mode operate, apply also for CoMP degeneration scene (such as single-point pass It is defeated).For example, as the user equipment 106 in Fig. 1 was under the combining and cover of base station equipment 101 and RRH102, it and user equipment 105 difference be it be LTE Rel-11 user equipment, be that it does not use CoMP transmission side with the difference of user equipment 107 Method.Because user equipment 106 does not use CoMP transmission method, therefore need to select a CSI-RS lattice in CSI-RS measuring assemblies The corresponding transfer point of formula is used as data channel and the actual transmissions point of the specific control channel of user equipment, or is association transmission Point (Associated Transmission Point).In this case, the operation of user equipment 106 sets with above-mentioned user Standby 107 operation is identical, and the CSI-RS that simply the report set obtaining unit 230 of user equipment 106 is obtained reports set and only wraps The CSI-RS form corresponding with association transfer point is included, and feedback resources determining unit 240 is only determined for feeding back and this The feedback resources of the corresponding CSI of CSI-RS forms.Therefore, user equipment 106 can be as user equipment of the invention The special case reported in the case that set sizes M is 1 in CSI-RS is realized.
User equipment of the invention described by taking the corresponding communication system of foregoing scene 4 as an example above, but this hair Bright embodiment not limited to this.LTE Rel-11 and later version are also possible to be deployed in scene 1,2 or 3, these scenes with The difference of scene 4 is that each transfer point has independent cell ID, but for CSI-RS forms, there is independent cell ID just has independent CSI-RS forms naturally, therefore those skilled in the art are readily apparent that, thought of the invention is directed to CSI- RS forms, and do not rely on whether the transfer point corresponding to CSI-RS forms has same cells ID.Therefore, it is of the invention User equipment is also applied for the communication system corresponding to foregoing scene 1,2 and 3.
Moreover, it is noted that because user equipment can be moved in the cell, therefore the measuring assembly that base station equipment is detected Can change.Therefore, in CSI-RS measuring assembly configuration signals, can be dynamically user equipment increase, reduce, change The CSI-RS forms of measurement.In CSI-RS reports set configuration signal, CSI-RS report set notice signalings, can be dynamically Increase, reduce, change the CSI-RS forms reported.
The signaling being related in the present invention make use of (including the PUCCH or aperiodic of layer 1 of existing signaling in LTE technologies PUSCH, or layer 2 MAC signalings, or layer 3 RRC signaling) basic format.The content of signaling described in the invention will be with load Mode be carried in existing signaling format, transmitted between base station equipment and user equipment, it is of the present invention to realize Function.
The flow chart of the embodiment of channel condition information of the invention (CSI) feedback method described referring to the drawings. In the following description, for clarity, describing the method for the present invention with reference to the specific embodiment of above user equipment and base station.So And, it will be appreciated by the appropriately skilled person that illustrating the present invention with reference to the specific functional units of above user equipment and base station Method be used for the purpose of illustrative purpose, in the case where for example implementation method is carried out using computer program, completely without this The division of functional unit and component is planted, but user equipment realizes the method for the present invention as an entirety.
Fig. 4 illustrates the flow chart of the embodiment of CSI feedback method 400 of the invention.According to the CSI of the embodiment Feedback method can be performed at user equipment.The method is comprised the following steps：
In step 401, the receiving unit 210 of user equipment is surveyed from base station receiving channel state information reference signal CSI-RS Duration set configuration signal, the CSI-RS measuring assemblies configuration signal includes the CSI-RS measuring assemblies for user device configuration Instruction；
In step 402, the measuring unit 220 of user equipment according to the instruction of the CSI-RS measuring assemblies, to described CSI-RS in CSI-RS measuring assemblies is measured, relative with the CSI-RS forms in the CSI-RS measuring assemblies to obtain The metric answered；
In step 403, the report set obtaining unit 230 of user equipment obtains CSI-RS and reports set, the CSI-RS It is, according to the metric, to be selected from the CSI-RS measuring assemblies to report set；
In step 404, during the feedback resources determining unit 240 of user equipment determines to gather with CSI-RS reports The corresponding CSI feedback resource of CSI-RS forms；And
In step 405, the transmitting element 250 of user equipment uses identified CSI feedback resource, to base station feedback and institute State the corresponding CSI of CSI-RS forms that CSI-RS is reported in set.
Preferably, the metric include it is following at least one：Channel quality indicator (CQI), pre-coding matrix instruction PMI, reference signal receive energy RSRP and Reference Signal Received Quality RSRQ.
Preferably, obtaining CSI-RS and reporting includes the step of gathering 403：
The transmitting element 250 of user equipment sends to base station the metric；And
The receiving unit 210 of user equipment receives CSI-RS and reports set configuration signal, the report of user equipment from base station Set obtaining unit 230 reports set configuration signal according to the CSI-RS to obtain CSI-RS report set；
Wherein, the CSI-RS reports set configuration signal includes the CSI- selected according to the metric base station RS reports the instruction of the CSI-RS forms in set.
Preferably, the step of determining CSI feedback resource 404 includes：
The receiving unit 210 of user equipment receives CSI feedback resource allocation signaling from base station, and the CSI feedback resource is matched somebody with somebody Confidence order includes the instruction of the CSI feedback resource corresponding to the CSI-RS forms reported with the CSI-RS in set；
The feedback resources determining unit 240 of user equipment determines CSI according to the CSI feedback resource allocation signaling for being received Feedback resources.
Preferably, obtaining CSI-RS and reporting includes the step of gathering 403：
The report set obtaining unit 230 of user equipment according to the metric, from the CSI-RS measuring assemblies Selection CSI-RS reports set.
Preferably, the step of determining CSI feedback resource 404 includes：
The transmitting element 250 of user equipment sends CSI-RS and reports set notice signaling to base station, and the CSI-RS is reported Set notice signaling includes reporting the CSI-RS of user equipment selection the instruction of set；
The receiving unit 210 of user equipment receives CSI feedback resource allocation signaling from base station, and the CSI feedback resource is matched somebody with somebody Confidence order includes the instruction of the CSI feedback resource corresponding to the CSI-RS forms reported with the CSI-RS in set；And
The feedback resources determining unit 240 of user equipment determines CSI according to the CSI feedback resource allocation signaling for being received Feedback resources.
Preferably, in step 401, the CSI-RS measuring assemblies configuration signal is also included to available CSI feedback resource Instruction.
Preferably, the step of determining CSI feedback resource 404 includes：
The feedback resources determining unit 240 of user equipment according to the instruction to can use CSI feedback resource, it is determined that with it is described CSI-RS reports the corresponding CSI feedback resource of CSI-RS forms in set；
Methods described also includes：
The transmitting element 250 of user equipment sends CSI feedback resource notification signaling to base station, and the CSI feedback resource is led to Know that signaling includes the instruction to identified CSI feedback resource.
Fig. 5 illustrates the flow chart of the embodiment of CSI feedback method 500 of the invention.According to the CSI of the embodiment Feedback method can be performed at base station equipment.The method is comprised the following steps：
In step 501, the measuring assembly dispensing unit 320 of base station is for user device configuration channel condition information reference letter Number CSI-RS measuring assemblies, the CSI-RS measuring assemblies include the user equipment CSI-RS forms to be measured；
In step 502, the transmitting element 310 of base station sends CSI-RS measuring assembly configuration signals to user equipment, described CSI-RS measuring assemblies configuration signal includes that CSI-RS measuring assemblies dispensing unit is measured for the CSI-RS of user device configuration The instruction of set；
In step 503, the report set obtaining unit 330 of base station obtains CSI-RS and reports set, wherein, the CSI-RS It is the metric that the CSI-RS in the CSI-RS measuring assemblies is measured and obtained according to user equipment to report set, Selected from the CSI-RS measuring assemblies；
In step 504, the feedback resources determining unit 340 of base station determines to report the CSI-RS in set with the CSI-RS The corresponding CSI feedback resource of form；And
In step 505, the receiving unit 350 of base station receives the CSI- reported with the CSI-RS in set from user equipment The feedback of the corresponding CSI of RS forms.
Preferably, the metric include it is following at least one：Channel quality indicator (CQI), pre-coding matrix instruction PMI, reference signal receive energy RSRP and Reference Signal Received Quality RSRQ.
Preferably, obtaining CSI-RS and reporting includes the step of gathering 503：
The receiving unit 350 of base station receives the metric from user equipment；
The report set obtaining unit 330 of base station is selected according to the metric from the CSI-RS measuring assemblies CSI-RS reports set；
Methods described also includes：
The transmitting element 310 of base station sends CSI-RS and reports set configuration signal to user equipment；
Wherein, the CSI-RS reports set configuration signal and includes reporting selected CSI-RS the CSI-RS in set The instruction of form.
Preferably, obtaining CSI-RS and reporting includes the step of gathering 503：
The receiving unit 350 of base station receives CSI-RS and reports set notice signaling from user equipment, and the CSI-RS is reported Set notice signaling is included to user equipment according to the metric, the CSI-RS selected from the CSI-RS measuring assemblies Report the instruction of set；
The report set obtaining unit 330 of base station reports set notice signaling to obtain the CSI- according to the CSI-RS RS reports set.
Preferably, the step of determining CSI feedback resource 504 includes：
The feedback resources determining unit 340 of base station determines that the CSI-RS forms reported with the CSI-RS in set are corresponding CSI feedback resource；
Methods described also includes：
The transmitting element 310 of base station sends CSI feedback resource allocation signaling to user equipment, and the CSI feedback resource is matched somebody with somebody Confidence order includes the instruction to identified CSI feedback resource.
Preferably, in step 502, the CSI-RS measuring assemblies configuration signal is also included to available CSI feedback resource Instruction.
Preferably, the step of determining CSI feedback resource 504 includes：
The receiving unit 350 of base station receives CSI feedback resource notification signaling from user equipment, and the CSI feedback resource is led to Know that signaling includes the instruction of the CSI feedback resource corresponding to the CSI-RS forms reported with the CSI-RS in set, it is described CSI feedback resource is user equipment according to pair being determined with the instruction of CSI feedback resource；
The feedback resources determining unit 340 of base station determines that CSI feedback is provided according to the CSI feedback resource notification signaling Source.
It should be noted that in the above description, only in an illustrative manner, technical scheme is shown, but It is not intended that the invention be limited to above-mentioned steps and cellular construction.In a likely scenario, can as needed to step and Cellular construction is adjusted and accepts or rejects.Therefore, not to implement overall invention thought of the invention institute required for some steps and unit Element.Therefore, technical characteristic essential to the invention is limited solely by can realize the minimum of overall invention thought of the invention It is required that, without being limited by above instantiation.
In the above description, multiple examples are listed, although inventor indicates example associated with each other as much as possible, But this does not imply that necessarily there is corresponding relation according to described mode in these examples.As long as selected example gives Condition ask in the absence of contradiction, not corresponding example can be selected to constitute corresponding technical scheme, such technical scheme Also should be regarded as being comprised in the scope of the present invention.
So far combined preferred embodiment invention has been described.It should be understood that those skilled in the art are not In the case of departing from the spirit and scope of the present invention, various other changes can be carried out, replace and add.Therefore, the present invention Scope be not limited to above-mentioned specific embodiment, and should be defined by the appended claims.

Claims (30)

1. a kind of CSI back method that user equipment is performed, comprises the following steps：
From base station receiving channel state information reference signal CSI-RS measuring assembly configuration signals, the CSI-RS measuring assemblies are matched somebody with somebody Confidence order includes the instruction of the CSI-RS measuring assemblies for the user device configuration；
According to the instruction of the CSI-RS measuring assemblies, the CSI-RS in the CSI-RS measuring assemblies is measured, to obtain Obtain the metric corresponding with the CSI-RS forms in the CSI-RS measuring assemblies；
Obtain CSI-RS and report set, it is to be measured to collect from the CSI-RS according to the metric that the CSI-RS reports set Selected in conjunction；
It is determined that the CSI feedback resource corresponding with the CSI-RS forms in CSI-RS report set；And
Using identified CSI feedback resource, the CSI-RS forms reported with the CSI-RS to base station feedback in set are relative The CSI for answering.
2. CSI feedback method according to claim 1, wherein, the metric include it is following at least one：Channel matter Amount instruction CQI, pre-coding matrix instruction PMI, reference signal receive energy RSRP and Reference Signal Received Quality RSRQ.
3. CSI feedback method according to claim 1, wherein, obtaining the step of CSI-RS reports set includes：
The metric is sent to base station；And
CSI-RS is received from base station and report set configuration signal, and gather configuration signal to obtain according to CSI-RS reports CSI-RS reports set；
Wherein, the CSI-RS reports set configuration signal includes that the CSI-RS selected according to the metric base station converges The instruction of the CSI-RS forms in report set.
4. CSI feedback method according to claim 3, wherein it is determined that the step of CSI feedback resource includes：
From base station receive CSI feedback resource allocation signaling, the CSI feedback resource allocation signaling include pair with the CSI-RS converge Report the instruction of the corresponding CSI feedback resource of the CSI-RS forms in set；
CSI feedback resource is determined according to the CSI feedback resource allocation signaling for being received.
5. CSI feedback method according to claim 1, wherein, obtaining the step of CSI-RS reports set includes：
According to the metric, CSI-RS is selected to report set from the CSI-RS measuring assemblies.
6. CSI feedback method according to claim 5, wherein it is determined that the step of CSI feedback resource includes：
CSI-RS being sent to base station and reporting set notice signaling, the CSI-RS reports set notice signaling to be included to user equipment The CSI-RS of selection reports the instruction of set；
From base station receive CSI feedback resource allocation signaling, the CSI feedback resource allocation signaling include pair with the CSI-RS converge Report the instruction of the corresponding CSI feedback resource of the CSI-RS forms in set；And
CSI feedback resource is determined according to the CSI feedback resource allocation signaling for being received.
7. CSI feedback method according to claim 1, wherein, it is right that the CSI-RS measuring assemblies configuration signal also includes The instruction of CSI feedback resource can be used.
8. CSI feedback method according to claim 7, wherein it is determined that the step of CSI feedback resource includes：Can according to pair With the instruction of CSI feedback resource, it is determined that the CSI feedback corresponding with the CSI-RS forms in CSI-RS report set is provided Source；
Methods described also includes：
CSI feedback resource notification signaling is sent to base station, the CSI feedback resource notification signaling includes anti-to identified CSI Present the instruction of resource.
9. a kind of user equipment, including：
Receiving unit, from base station receiving channel state information reference signal CSI-RS measuring assembly configuration signals, the CSI-RS Measuring assembly configuration signal includes the instruction of the CSI-RS measuring assemblies for the user device configuration；
Measuring unit, the instruction of the CSI-RS measuring assemblies received according to receiving unit, in the CSI-RS measuring assemblies CSI-RS is measured, to obtain the metric corresponding with the CSI-RS forms in the CSI-RS measuring assemblies；
Report set obtaining unit, obtain CSI-RS and report set, the CSI-RS report set be according to the metric, Selected from the CSI-RS measuring assemblies；
Feedback resources determining unit, it is determined that reporting the CSI-RS forms in set with the CSI-RS for reporting set obtaining unit acquisition Corresponding CSI feedback resource；And
Transmitting element, the CSI feedback resource determined using feedback resources determining unit, is reported to base station feedback with the CSI-RS The corresponding CSI of CSI-RS forms in set.
10. user equipment according to claim 9, wherein, the metric include it is following at least one：Channel quality CQI, pre-coding matrix instruction PMI, reference signal is indicated to receive energy RSRP and Reference Signal Received Quality RSRQ.
11. user equipmenies according to claim 9, wherein,
Transmitting element is additionally configured to send the metric to base station；
Receiving unit is additionally configured to receive CSI-RS and report from base station gather configuration signal；And
Report set obtaining unit to be configured as, the CSI-RS received according to receiving unit reports set configuration signal to obtain CSI-RS reports set；
Wherein, the CSI-RS reports set configuration signal includes that the CSI-RS selected according to the metric base station converges The instruction of the CSI-RS forms in report set.
12. user equipmenies according to claim 11, wherein,
Receiving unit is additionally configured to receive CSI feedback resource allocation signaling, the CSI feedback resource allocation signaling bag from base station Include the instruction of the CSI feedback resource corresponding to the CSI-RS forms reported with the CSI-RS in set；
The CSI feedback resource allocation signaling that feedback resources determining unit is configured as being received according to receiving unit is anti-to determine CSI Feedback resource.
13. user equipmenies according to claim 9, wherein,
Report set obtaining unit to be configured as according to the metric, CSI-RS is selected from the CSI-RS measuring assemblies Report set.
14. user equipmenies according to claim 13, wherein,
Transmitting element is additionally configured to send CSI-RS and report to base station gather notice signaling, and the CSI-RS reports set and notifies Signaling includes reporting the CSI-RS of user equipment selection the instruction of set；
Receiving unit is additionally configured to receive CSI feedback resource allocation signaling, the CSI feedback resource allocation signaling bag from base station Include the instruction of the CSI feedback resource corresponding to the CSI-RS forms reported with the CSI-RS in set；And
The CSI feedback resource allocation signaling that feedback resources determining unit is configured as being received according to receiving unit is anti-to determine CSI Feedback resource.
15. user equipmenies according to claim 9, wherein, the CSI-RS measuring assemblies configuration signal can also including pair With the instruction of CSI feedback resource.
16. user equipmenies according to claim 15, wherein,
Feedback resources determining unit is configured as according to the instruction to can use CSI feedback resource, it is determined that being reported with the CSI-RS The corresponding CSI feedback resource of CSI-RS forms in set；
Transmitting element is additionally configured to send CSI feedback resource notification signaling, the CSI feedback resource notification signaling bag to base station Include the instruction of the CSI feedback resource determined to feedback resources determining unit.
The CSI back method that a kind of 17. base stations perform, comprises the following steps：
For user device configuration channel state information reference signals CSI-RS measuring assemblies, the CSI-RS measuring assemblies include The CSI-RS forms that the user equipment to be measured；
CSI-RS measuring assembly configuration signals are sent to user equipment, the CSI-RS measuring assemblies configuration signal includes being configured CSI-RS measuring assemblies instruction；
Obtain CSI-RS and report set, wherein, it is that the CSI-RS is measured according to user equipment that the CSI-RS reports set The metric that CSI-RS in set is measured and obtained, selects from the CSI-RS measuring assemblies；
It is determined that the CSI feedback resource corresponding with the CSI-RS forms in CSI-RS report set；And
The feedback of the corresponding CSI of the CSI-RS forms reported with the CSI-RS in set is received from user equipment.
18. CSI feedback methods according to claim 17, wherein, the metric include it is following at least one：Channel Quality indicator (CQI), pre-coding matrix instruction PMI, reference signal receive energy RSRP and Reference Signal Received Quality RSRQ.
19. CSI feedback methods according to claim 17, wherein, obtaining the step of CSI-RS reports set includes：From with Family equipment receives the metric；And according to the metric, CSI-RS is selected from the CSI-RS measuring assemblies Report set；
Methods described also includes：
CSI-RS is sent to user equipment report set configuration signal；
Wherein, the CSI-RS reports set configuration signal and includes reporting selected CSI-RS the CSI-RS forms in set Instruction.
20. CSI feedback methods according to claim 17, wherein, obtaining the step of CSI-RS reports set includes：
CSI-RS being received from user equipment and reporting set notice signaling, the CSI-RS reports set notice signaling to be included to user Equipment reports the instruction of set according to the metric, the CSI-RS selected from the CSI-RS measuring assemblies；
Set notice signaling is reported according to the CSI-RS to obtain the CSI-RS reports set.
21. CSI feedback methods according to claim 17, wherein it is determined that the step of CSI feedback resource includes：
It is determined that the CSI feedback resource corresponding with the CSI-RS forms in CSI-RS report set；
Methods described also includes：
CSI feedback resource allocation signaling is sent to user equipment, the CSI feedback resource allocation signaling is included to identified The instruction of CSI feedback resource.
22. CSI feedback methods according to claim 17, wherein, the CSI-RS measuring assemblies configuration signal also includes Instruction to can use CSI feedback resource.
23. CSI feedback methods according to claim 22, wherein it is determined that the step of CSI feedback resource includes：
From user equipment receive CSI feedback resource notification signaling, the CSI feedback resource notification signaling include pair with the CSI- RS reports the instruction of the corresponding CSI feedback resource of CSI-RS forms in set, and the CSI feedback resource is user equipment root Can be determined with the instruction of CSI feedback resource according to Dui；
CSI feedback resource is determined according to the CSI feedback resource notification signaling.
A kind of 24. base stations, including：
Measuring assembly dispensing unit, it is described for user device configuration channel state information reference signals CSI-RS measuring assemblies CSI-RS measuring assemblies include the user equipment CSI-RS forms to be measured；
Transmitting element, CSI-RS measuring assembly configuration signals, the CSI-RS measuring assemblies configuration signal are sent to user equipment The instruction of the CSI-RS measuring assemblies including CSI-RS measuring assembly configuration of described dispensing unit；
Set obtaining unit is reported, CSI-RS is obtained and is reported set, wherein, it is according to user equipment that the CSI-RS reports set The metric that CSI-RS in the CSI-RS measuring assemblies is measured and obtained, from the CSI-RS measuring assemblies Selection；
Feedback resources determining unit, it is determined that reporting the CSI-RS forms in set with the CSI-RS for reporting set obtaining unit acquisition Corresponding CSI feedback resource；And
Receiving unit, the anti-of the corresponding CSI of the CSI-RS forms reported with the CSI-RS in set is received from user equipment Feedback.
25. base stations according to claim 24, wherein, the metric include it is following at least one：Channel quality refers to Show that CQI, pre-coding matrix instruction PMI, reference signal receive energy RSRP and Reference Signal Received Quality RSRQ.
26. base stations according to claim 24, wherein,
Receiving unit is additionally configured to receive the metric from user equipment；
Report set obtaining unit to be configured as according to the metric, CSI-RS is selected from the CSI-RS measuring assemblies Report set；
Transmitting element is additionally configured to send CSI-RS and report to user equipment gather configuration signal；
Wherein, the CSI-RS reports set configuration signal and includes reporting set to the CSI-RS for reporting set obtaining unit selection In CSI-RS forms instruction.
27. base stations according to claim 24, wherein,
Receiving unit is additionally configured to receive CSI-RS and report from user equipment gather notice signaling, and the CSI-RS reports set Notice signaling includes reporting user equipment according to the metric, the CSI-RS selected from the CSI-RS measuring assemblies The instruction of set；
Set obtaining unit is reported to be configured as reporting set notice signaling to obtain according to the CSI-RS of receiving unit reception CSI-RS reports set.
28. base stations according to claim 24, wherein,
Feedback resources determining unit is configured to determine that the corresponding CSI of the CSI-RS forms reported with the CSI-RS in set Feedback resources；
Transmitting element is additionally configured to send CSI feedback resource allocation signaling, the CSI feedback resource distribution letter to user equipment Order includes the instruction of the CSI feedback resource determined to feedback resources determining unit.
29. base stations according to claim 24, wherein, the CSI-RS measuring assemblies configuration signal is also included to available The instruction of CSI feedback resource.
30. base stations according to claim 29, wherein,
Receiving unit is configured as receiving CSI feedback resource notification signaling, the CSI feedback resource notification signaling from user equipment Including the instruction pair the CSI feedback resource corresponding with the CSI-RS forms in CSI-RS report set, the CSI feedback Resource is user equipment according to pair being determined with the instruction of CSI feedback resource；
The CSI feedback resource notification signaling that feedback resources determining unit is configured as being received according to receiving unit is anti-to determine CSI Feedback resource.
CN201110057916.7A 2011-03-11 2011-03-11 Channel state information feedback method, user equipment and base station Expired - Fee Related CN102684850B (en)

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