CN102684850A

CN102684850A - Method for feeding back channel state information, user device and base station

Info

Publication number: CN102684850A
Application number: CN2011100579167A
Authority: CN
Inventors: 杨曾; 黄磊; 丁铭; 刘仁茂
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2011-03-11
Filing date: 2011-03-11
Publication date: 2012-09-19
Anticipated expiration: 2031-03-11
Also published as: WO2012124552A1; CN102684850B

Abstract

The invention provides a method for feeding back channel state information (CSI), comprising the following steps of: receiving a CSI reference signal CSI-RS (CSI-Reference Signal) measurement set configuration signaling from a base station, and the CSI-RS measurement set configuration signaling comprising indications which aim at a CSI-RS measurement set configured by a user device; measuring the CSI-RS in the CSI-RS measurement set according to the indications of the CSI-RS measurement set to obtain metrics corresponding to the format of the CSI-RS in the CSI-RS measurement set; obtaining a CSI-RS report set which is selected from the CSI-RS measurement set according to the metrics; determining a CSI feedback resource corresponding to the format of the CSI-RS in the CSI-RS report set; and using the determined CSI feedback resource to feed back the CSI corresponding to the format of the CSI-RS in the CSI-RS report set to the base station. As well, the invention also provides the corresponding user device and the base station.

Description

Channel state information feedback method, subscriber equipment and base station

Technical field

The present invention relates to communication technical field, more specifically, relate to a kind of channel state information feedback method, subscriber equipment and base station that is particularly useful for collaboration type multicast communication scene.

Background technology

3GPP (3G (Third Generation) Moblie gpp) tissue is the international organization in the moving communicating field, and it is played an important role in the standardization effort of 3G cellular telecommunication art.The 3GPP tissue designs EUTRA (UMTS of evolution and continental rise radio insert) and EUTRAN (the UMTS net of evolution and continental rise radio access network) since the second half year in 2004, and this project also is called as LTE (Long Term Evolution is called LTE Rel-8 again) project.In April, 2008,3GPP is organized in the China Shenzhen meeting, begins to inquire into the standardization effort (be called as the LTE-A system at present and be called LTE Rel-10 again) of 4G cellular communication system.In the LTE-A system; The notion of CoMP (collaboration type multicast communication) obtains extensive concern and support; Its core concept is through the dynamic cooperation between the transmission point of separating on a plurality of geography (Transmission Point); Solve descending problem of inter-cell interference, thereby improve the message transmission rate and the user experience of cell boundary users.

3GPP research report 36.814 (3GPP TR 36.814 V9.0.0, Evolved UniversalTerrestrial Radio Access (E-UTRA); Further advancements for E-UTRAphysical layer aspects has defined some notions and the basic terms in the CoMP scene in 3GPP).

Serving cell (Serving Cell) refers to the sub-district of single transmission PDCCH (Physical Downlink Control Channel) information, and this is a notion existing among the LTE.

The CoMP transmission means is divided into following two types generally: Combined Treatment (Joint Processing, JP) and performing coordinated scheduling/beam forming (Coordinated Scheduling/Beamforming, CS/CB).Data are present on each the transmission point in the CoMP cooperation set (Cooperating Set) in the Combined Treatment; Be divided into joint transmission (Joint Transmission again; JT) and dynamic cell select (Dynamic Cell Selection; DCS), the two difference is that PDSCH (Physical Downlink Shared Channel) transmission occurs on a plurality of transmission points in the cooperation set or on the single transmission point.Data exist only on the Serving cell in performing coordinated scheduling/beam forming, and the decision-making of the scheduling of subscriber equipment and beam forming is to make on the foundation of collaboration between the transmission point in CoMP cooperation set.

Subscriber equipment among the CoMP need be to the channel status/statistical information of the link between one group of each cell base station equipment of cell measurement and the subscriber equipment.This group sub-district is called CoMP measuring assembly (Measurement Set).The sub-district of subscriber equipment actual feedback information can be that a sub-set of measuring assembly is called report set (Reported Set).Measuring assembly can be identical with CoMP cooperation set (Cooperating Set), and the cell base station equipment in the cooperation set is participated in the transmission to the Physical Downlink Shared Channel of subscriber equipment directly or indirectly.Cooperation set can be not transparent to subscriber equipment yet.For the subscriber equipment that is configured to the CoMP pattern, the form that feedback is fed back separately with every sub-district is main, and feedback transmission is carried out on the ascending resource of Serving cell.

The 50th meeting of 3GPP RAN further revised LTE Rel-11 CoMP research contents (RP-101425, Revised SID Proposal:Coordinated Multi-point Operationfor LTE, Samsung).For enlarging application range, also brought into the goal in research of CoMP such as distributed wireless far module unconventional deployment scenario such as (also being called RRH or RRU) in heterogeneous network (HeterogeneousNetworks) and/or the sub-district.According to the conclusion of the 63bis time meeting of 3GPP RAN1, CoMP research will be carried out to following four deployment scenario:

Scene 1: CoMP in standing;

Scene 2: CoMP between standing;

Scene 3: many sub-districts ID: all the transmission points during macrocell covers have different sub-district ID;

Scene 4: share sub-district ID: all the transmission points during macrocell covers have identical sub-district ID.

A total hypothesis is that the communication between the transmission point is low delay in above-mentioned all scenes; Limitless volumes; This also is to adopt the benefit the most direct that distributed RRH brought; Because the medium that connects this moment between the transmission point generally is an optical fiber, the restriction of transmission delay and bandwidth is relaxed greatly.

According to list of references R1-110461 (R1-110461, Baseline Schemes and Focus ofCoMP Studies, Ericsson; ST-Ericsson) and R1-110649 (R1-110649; Aspectson Distributed RRUs with Shared Cell-ID for Heterogeneous Deployments, Ericsson, ST-Ericsson); In above-mentioned CoMP scene; No matter whether share sub-district ID between the transmission point, in order to obtain effective CSI (channel condition information) feedback of each transmission point, each transmission point needs independently CSI-RS (channel state information reference signals) form (Pattern).The content of the form of CSI-RS comprises 1) sequence of CSI-RS, 2) quantity of antenna opening (Port), 3) the time-frequency position of CSI-RS in a sub-frame, put week, phase sub-frame offset, 4) data and CSI-RS EPRE (the every Resource Unit of power) ratio; Each needs the mourn in silence form of CSI-RS of (muting) of PDSCH, comprises the time-frequency position of this CSI-RS in a sub-frame, cycle, sub-frame offset etc.These information can be with reference to 36.211, and (TS 36.211, V10.0.0, Physical channels and modulation, 3GPP) 6.10.5 joint or 36.331 (TS 36.331, V10.0.0, Radio Resource Control (RRC); Protocol specification, 3GPP) the 6.3.2 joint is about the definition of CSI-RS-Config.It is subscriber equipment specific (UE Specific) that the transmission point that each subscriber equipment is measured CSI-RS and fed back CSI is gathered, so the configuration of CSI-RS form also should be that subscriber equipment is specific.Base station equipment is according to the upward signal of the subscriber equipment that receives; Measurement result like SRS (Sounding Reference Signal), PUCCH (Physical Uplink Control Channel) signal and PUSCH (Physical Uplink Shared Channel) signal etc.; The set of the CSI-RS form that configure user equipment need be measured is called the CSI-RS measuring assembly.The pairing transmission point of this CSI-RS measuring assembly constitutes the CoMP measuring assembly of original definition, and its size is configured by RRC (Radio Resource control) signaling.It is a sub-set of CSI-RS measuring assembly that CSI-RS reports set, and corresponding to the CoMP report set of original definition, its size also is configured by the RRC signaling.

In present standardization is discussed; Still there is not concrete grammar in order to realize from the CSI-RS measuring assembly, a selecting sub-set to report set as CSI-RS; And between base station equipment and subscriber equipment, transmit the signaling relevant with this selection, this problem has constituted main research contents of the present invention.

Summary of the invention

The objective of the invention is to be particularly useful for collaboration type multicast communication scene to how from the CSI-RS measuring assembly, selecting a sub-set to report channel state information feedback method, subscriber equipment and the base station that the problem of gathering provides a kind of novelty as CSI-RS.

According to first scheme of the present invention; A kind of channel condition information (CSI) feedback method has been proposed; May further comprise the steps: receiving channel state information reference signal (CSI-RS) the measuring assembly configuration signal from the base station, said CSI-RS measuring assembly configuration signal comprise the indication to the CSI-RS measuring assembly of said user device configuration; According to the indication of said CSI-RS measuring assembly, the CSI-RS in the said CSI-RS measuring assembly is measured, with the corresponding metric of CSI-RS form in acquisition and the said CSI-RS measuring assembly; Obtain CSI-RS and report set, it is according to said metric that said CSI-RS reports set, from said CSI-RS measuring assembly, selects; Confirm to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS; And use determined CSI feedback resources, report the corresponding CSI of CSI-RS form in the set to base station feedback and said CSI-RS.

Preferably said metric comprises following at least one: channel quality indication (CQI), pre-coding matrix indication (PMI), reference signal received energy (RSRP) and Reference Signal Received Quality (RSRQ).

The step that preferably obtains CSI-RS report set comprises: said metric is sent to the base station; And receive CSI-RS from the base station and report the set configuration signaling, and report the set configuration signaling according to said CSI-RS and obtain CSI-RS and report set; Wherein, said CSI-RS reports the indication that the set configuration signaling comprises that CSI-RS that the base station is selected according to said metric reports the CSI-RS form in the set.

The step of more preferably confirming the CSI feedback resources comprises: receive CSI feedback resources configuration signal from the base station, said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report; CSI feedback resources configuration signal according to being received is confirmed the CSI feedback resources.

The step that preferably obtains CSI-RS report set comprises: according to said metric, from said CSI-RS measuring assembly, select CSI-RS to report set.

The step of more preferably confirming the CSI feedback resources comprises: send CSI-RS to the base station and report the set notice signaling, said CSI-RS reports the set notice signaling and comprises that the CSI-RS that subscriber equipment is selected reports the indication of set; Receive CSI feedback resources configuration signal from the base station, said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report; And confirm the CSI feedback resources according to the CSI feedback resources configuration signal that is received.

Preferably, said CSI-RS measuring assembly configuration signal also comprise with to the indication of available CSI feedback resources.

More preferably, confirm that the step of CSI feedback resources comprises:, confirm to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS according to indication to available CSI feedback resources; Said method also comprises: send CSI feedback resources notice signaling to the base station, said CSI feedback resources notice signaling comprises the indication to determined CSI feedback resources.

According to alternative plan of the present invention; A kind of subscriber equipment has been proposed; Comprise: receiving element; The receiving channel state information reference signal CSI-RS measuring assembly configuration signal from the base station, said CSI-RS measuring assembly configuration signal comprise the indication to the CSI-RS measuring assembly of said user device configuration; Measuring unit, the indication of the CSI-RS measuring assembly that receives according to receiving element is measured the CSI-RS in the said CSI-RS measuring assembly, with obtain with said CSI-RS measuring assembly in the corresponding metric of CSI-RS form; Report set and obtain the unit, obtain CSI-RS and report set, it is according to said metric that said CSI-RS reports set, from said CSI-RS measuring assembly, selects; Feedback resources is confirmed the unit, confirms that the CSI-RS that obtains with report set acquisition unit reports the corresponding CSI feedback resources of CSI-RS form in gathering; And transmitting element, use feedback resources to confirm the CSI feedback resources that the unit is confirmed, report the corresponding CSI of CSI-RS form in the set to base station feedback and said CSI-RS.

Preferably, said metric comprises following at least one: channel quality indicator (CQI), pre-coding matrix indication PMI, reference signal received energy RSRP and Reference Signal Received Quality RSRQ.

Preferably, transmitting element also is configured to, and said metric is sent to the base station; Receiving element also is configured to, and receives CSI-RS from the base station and reports the set configuration signaling; And report set and obtain the unit and be configured to, the CSI-RS that receives according to receiving element reports the set configuration signaling and obtains CSI-RS and report set; Wherein, said CSI-RS reports the indication that the set configuration signaling comprises that CSI-RS that the base station is selected according to said metric reports the CSI-RS form in the set.

More preferably, receiving element also is configured to, and receives CSI feedback resources configuration signal from the base station, and said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report; Feedback resources confirms that the unit is configured to, and confirms the CSI feedback resources according to the CSI feedback resources configuration signal that receiving element receives.

Preferably, report set acquisition unit and be configured to,, from said CSI-RS measuring assembly, select CSI-RS to report set according to said metric.

More preferably, transmitting element also is configured to, and sends CSI-RS to the base station and reports the set notice signaling, and said CSI-RS reports the set notice signaling and comprises that the CSI-RS that subscriber equipment is selected reports the indication of set; Receiving element also is configured to, and receives CSI feedback resources configuration signal from the base station, and said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report; And feedback resources confirms that the unit is configured to, and confirms the CSI feedback resources according to the CSI feedback resources configuration signal that receiving element receives.

More preferably, feedback resources confirms that the unit is configured to, and according to the indication to available CSI feedback resources, confirms to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS; Transmitting element also is configured to, and sends CSI feedback resources notice signaling to the base station, and said CSI feedback resources notice signaling comprises the indication of feedback resources being confirmed the CSI feedback resources that the unit is confirmed.

According to third party's case of the present invention; A kind of channel condition information CSI feedback method has been proposed; May further comprise the steps: to user device configuration channel state information reference signals CSI-RS measuring assembly, said CSI-RS measuring assembly comprises the CSI-RS form that said subscriber equipment will be measured; Send CSI-RS measuring assembly configuration signal to subscriber equipment, said CSI-RS measuring assembly configuration signal comprises the indication of the CSI-RS measuring assembly that is disposed; Obtain CSI-RS and report set, wherein, it is according to subscriber equipment the CSI-RS in the said CSI-RS measuring assembly to be measured the metric that obtains that said CSI-RS reports set, from said CSI-RS measuring assembly, selects; Confirm to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS; And the feedback of the corresponding CSI of CSI-RS form from subscriber equipment reception and said CSI-RS report are gathered.

Preferably, the step of acquisition CSI-RS report set comprises: receive said metric from subscriber equipment; From said CSI-RS measuring assembly, select CSI-RS to report set according to said metric; Said method also comprises: send CSI-RS to subscriber equipment and report the set configuration signaling; Wherein, said CSI-RS report set configuration signaling comprises the indication of selected CSI-RS being reported the CSI-RS form in the set.

Preferably; The step that obtains CSI-RS report set comprises: receive CSI-RS from subscriber equipment and report the set notice signaling, said CSI-RS report set notice signaling comprises selects CSI-RS to report the indication of set to subscriber equipment according to said metric, from said CSI-RS measuring assembly; Report the set notice signaling according to said CSI-RS and obtain said CSI-RS report set.

The step of preferably confirming the CSI feedback resources comprises: confirm to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS; Said method also comprises: send CSI feedback resources configuration signal to subscriber equipment, said CSI feedback resources configuration signal comprises the indication to determined CSI feedback resources.

Preferably said CSI-RS measuring assembly configuration signal also comprise with to the indication of available CSI feedback resources.

More preferably; The step of confirming the CSI feedback resources comprises: receive CSI feedback resources notice signaling from subscriber equipment, said CSI feedback resources notice signaling comprises that the said CSI feedback resources of indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report is that subscriber equipment is according to the indication of available CSI feedback resources is confirmed; Confirm the CSI feedback resources according to said CSI feedback resources notice signaling.

According to cubic case of the present invention; A kind of base station has been proposed; Comprise: the measuring assembly dispensing unit, to user device configuration channel state information reference signals CSI-RS measuring assembly, said CSI-RS measuring assembly comprises the CSI-RS form that said subscriber equipment will be measured; Transmitting element sends CSI-RS measuring assembly configuration signal to subscriber equipment, and said CSI-RS measuring assembly configuration signal comprises the indication of the CSI-RS measuring assembly of CSI-RS measuring assembly dispensing unit configuration; Report set and obtain the unit, obtain CSI-RS and report set, wherein, it is according to subscriber equipment the CSI-RS in the said CSI-RS measuring assembly to be measured the metric that obtains that said CSI-RS reports set, from said CSI-RS measuring assembly, selects; Feedback resources is confirmed the unit, confirms that the CSI-RS that obtains with report set acquisition unit reports the corresponding CSI feedback resources of CSI-RS form in gathering; And receiving element, receive the feedback of reporting the corresponding CSI of CSI-RS form the set with said CSI-RS from subscriber equipment.

Preferably said metric comprises following at least one: channel quality indicator (CQI), pre-coding matrix indication PMI, reference signal received energy RSRP and Reference Signal Received Quality RSRQ.

Preferably, receiving element also is configured to, and receives said metric from subscriber equipment; Report set acquisition unit and be configured to,, from said CSI-RS measuring assembly, select CSI-RS to report set according to said metric; Transmitting element also is configured to, and sends CSI-RS to subscriber equipment and reports the set configuration signaling; Wherein, said CSI-RS report set configuration signaling comprises reporting the indication of the CSI-RS form in the CSI-RS report set of selecting set acquisition unit.

Preferably; Receiving element also is configured to; Receive CSI-RS from subscriber equipment and report the set notice signaling, said CSI-RS report set notice signaling comprises selects CSI-RS to report the indication of set to subscriber equipment according to said metric, from said CSI-RS measuring assembly; Report set and obtain the unit and be configured to, the CSI-RS that receives according to receiving element reports the set notice signaling and obtains CSI-RS and report set.

Preferably, feedback resources confirms that the unit is configured to, and confirms to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS; Transmitting element also is configured to, and sends CSI feedback resources configuration signal to subscriber equipment, and said CSI feedback resources configuration signal comprises the indication of feedback resources being confirmed the CSI feedback resources that the unit is confirmed.

More preferably; Receiving element is configured to; Receive CSI feedback resources notice signaling from subscriber equipment; Said CSI feedback resources notice signaling comprises that said CSI feedback resources is that subscriber equipment is according to the indication of available CSI feedback resources is confirmed to the indication of the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report; Feedback resources confirms that the unit is configured to, and confirms the CSI feedback resources according to the CSI feedback resources notice signaling that receiving element receives.

Description of drawings

Through below in conjunction with description of drawings the preferred embodiments of the present invention, will make above-mentioned and other purpose of the present invention, feature and advantage clearer, wherein:

Fig. 1 shows the sketch map of example application scene of the present invention;

Fig. 2 shows the schematic block diagram according to subscriber equipment of the present invention;

Fig. 3 shows the schematic block diagram according to base station of the present invention;

Fig. 4 shows the flow chart according to the channel state information feedback method of the embodiment of the invention; And

Fig. 5 shows the flow chart of channel state information feedback method according to another embodiment of the present invention.

Embodiment

To a preferred embodiment of the present invention will be described in detail, in the description process, having omitted is unnecessary details and function for the present invention with reference to the accompanying drawings, obscures to prevent understanding of the present invention caused.

At length set forth performing step of the present invention for clear, provide some specific embodiments of the present invention below, be applicable to LTE-A (Rel-10, Rel-11 and later version) cellular communication system.Need to prove, the invention is not restricted to the application described in the embodiment, but applicable to other communication systems, such as 5G system from now on.

Fig. 1 shows an example under the scene 4 that can use in the LTE Rel-11 network of the present invention.One skilled in the art will recognize that application scenarios of the present invention is not limited to scene 4, but comprise all scenes in the CoMP technical scope,, also comprise the degeneration scene of CoMP like the following stated.In scene 4, macro cell base station 101 covers down also has three distributed RRH, is respectively RRH 102, RRH 103 and RRH 104.Macro cell base station 101, RRH 102, RRH 103 and RRH 104 these four transmission points have identical sub-district ID, but each self-configuring different CSI-RS forms, be respectively CSI-RS form 0, CSI-RS form 1, CSI-RS form 2 and CSI-RS form 3.Though the CSI-RS form of different transmission point configuration is different among Fig. 1, the CSI-RS form of different transmission points can be identical in the practical communication process.Two kinds of situation are arranged here; A kind of be physically separate better the RRH transmission point of (signal between the transmission point can not interfere with each other) can multiplexing identical CSI-RS form; To save taking of CSI-RS form, the pairing CSI-RS port of antenna (Port) of different here transmission points can be identical; Another kind is that several transmission points of close together (signal between the transmission point can interfere with each other) physically also can use identical CSI-RS form, and the pairing CSI-RS port of antenna of different here transmission points can be identical or different.The pairing CSI-RS port of antenna of different transmission points can reduce the number of the visible transmission point of subscriber equipment when identical, when increasing SFN (SFN) coverage effect, reduce the complexity of network.The pairing CSI-RS port of antenna of different transmission points not simultaneously, the antennas of different transmission points can constitute a transmission point that has more antennas altogether and be beneficial to increase spatial degrees of freedom.For example, two transmission points have 4 antennas respectively, adopt identical CSI-RS form, but the CSI-RS port take 1～4 and 5～8 respectively, are 8 logical transport point so can constitute an antenna number.The mode of this logical point and telex network can be regarded as a big MIMO (multiple-input and multiple-output), is called the network MIMO transmission means again.Following discussion also should be suitable for above-mentioned these situations.

For example, subscriber equipment 105 can be configured to use CSI-RS form 0, promptly only by macro cell base station equipment 101 service is provided.If this subscriber equipment is the subscriber equipment of (not comprising Rel-11) before the LTE Rel-11, then the basic communication method between the base station of this LTE Rel-11 and this subscriber equipment has three kinds:

A kind of is that this subscriber equipment of hypothesis is the Rel-10 subscriber equipment, and the base station configuration subscriber equipment uses transmission mode 9, i.e. 8 layers of (layer) transmission mode.Under this transmission mode, the base station will be according to the measurement result decision of the upward signal of this subscriber equipment and the transmission point of this user device association (macro cell base station transmission point or RRH transmission point), and the CSI-RS format configuration that will transmit correspondence a little is to this subscriber equipment.Subscriber equipment will feed back to the base station with the corresponding channel condition information of transmission mode through measuring this CSI-RS.The base station sends descending assignment information to subscriber equipment (this signal will send with the mode of SFN through all transmission points) subscriber equipment and obtains this assignment information through the soft merging of descending SFN through the PDCCH based on CRS (public reference signal) demodulation.The PDSCH that the base station will be sent based on DM-RS (demodulated reference signal) demodulation through the transmission point of above-mentioned association gives subscriber equipment.This communication means can obtain space reuse (SpatialReuse) gain.

Second kind of communication means is the communication mode of compatible LTE Rel-8/9; Promptly based on the descending control signaling of CRS demodulation; Comprise PCFICH (Physical Control Format Indicator Channel), PHICH (physical mixed automatic re-transmission indicating channel), PDCCH and CRS itself; All send from all transmission points through the mode of similar SFN, subscriber equipment receives the control signaling and comes feeding back channel state information through measuring CRS through the soft merging mode of SFN.Base station equipment will send to subscriber equipment based on the PDSCH of CRS demodulation through the mode identical with above-mentioned control signaling.This communication mode can't obtain the space reuse gain.

The third communication means is compatible LTE Rel-8/9 and the communication mode method that adopts the specific DM-RS of subscriber equipment, like Rel-8 transmission mode 7, and Rel-9 transmission mode 8 etc.This method between preceding two kinds of methods, with the difference of first method be that obtaining of CSI can only be realized through CRS, with the difference of second method be when PDSCH transmit, can use DM-RS, therefore also can obtain space reuse and gain.

In these three kinds of communication modes, the base station all sends to signal of base station through the soft merging of upward signal that all transmission points receive to obtain subscriber equipment.

The LTE system that (comprises Rel-11) after the Rel-11 will introduce new CoMP communication means, and will be different with above-mentioned communication means.Rel-11 subscriber equipment 107 with the employing CoMP communication means among Fig. 1 is an example; The upward signal of this subscriber equipment can be comprised, and 4 transmission points of base station equipment 101 and RRH 102,103 and 104 receive, so base station equipment 101 can be configured to comprise CSI-RS form 0～3 with the CSI-RS measuring assembly of this subscriber equipment 107.The concrete realization of subscriber equipment 107 and with the step of the communication means of network side will be in following discussion.Below will not specifically describe with the present invention incoherent details, insert process that the back communicates with LTE Rel-8/9/10 compatibility mode or the like as conceiving irrelevant assembly, initial access process and initial in the communication process with the present invention in the subscriber equipment 107.

Fig. 2 shows the schematic block diagram according to subscriber equipment of the present invention (for example subscriber equipment 107).This subscriber equipment comprises: receiving element 210, measuring unit 220, report set obtain unit 230, feedback resources is confirmed unit 240 and transmitting element 250.It will be understood by those skilled in the art that this subscriber equipment also comprises necessary other functional units of its function of realization, like various processors, memory or the like.

Fig. 3 shows the schematic block diagram according to base station of the present invention (for example the base station 101).This base station comprises: transmitting element 310, measuring assembly are confirmed unit 320, are reported set acquisition unit 330; Feedback resources is confirmed unit 340 and receiving element 350.It will be understood by those skilled in the art that this base station equipment also comprises necessary other functional units of its function of realization, like various processors, memory or the like.

Followingly specifically describe concrete function and operation according to the assembly of subscriber equipment of the present invention and base station with reference to Fig. 2 and Fig. 3.

The measuring assembly dispensing unit 320 of base station is configured to, and to user device configuration channel state information reference signals CSI-RS measuring assembly, said CSI-RS measuring assembly comprises the CSI-RS form that subscriber equipment will be measured.

In an embodiment; The measuring assembly dispensing unit 320 of base station equipment can be according to the measurement result of the upward signal that subscriber equipment is sent; Give user device configuration CSI-RS measuring assembly; And pass through transmitting element 310 and send CSI-RS measuring assembly configuration signal to subscriber equipment, said CSI-RS measuring assembly configuration signal comprises the indication to the CSI-RS measuring assembly of user device configuration.Particularly; The various upward signals that the subscriber equipment that macro cell base station equipment and distributed RRH equipment can receive through sky line computation separately sends are (like PUCCH; SRS; PUSCH etc.) intensity; After measuring assembly in the base station equipment confirms that these information are handled in unit 320, will need the information such as CSI-RS form of the transmission point (macro cell base station equipment and/or RRH equipment also can be the transmission points of logic) of subscriber equipment measurement to send to subscriber equipment through the proprietary RRC signaling of subscriber equipment (being CSI-RS measuring assembly configuration signal) through transmitting element 310.

Particularly, the measuring assembly of base station confirms that unit 320 can be configured to: transmission point that need to confirm the subscriber equipment measurement; Confirm the transmission mode and the corresponding feedback pattern that can provide for subscriber equipment through these transmission points; And the CSI-RS form of confirming these transmission points.

Measuring assembly confirms that unit 320 can transmit an intensity of the upward signal of the subscriber equipment that receives according to difference and confirm the transmission point that the needs subscriber equipment is measured.Through the thresholding lower bound of setting signal intensity, can at first exclude some and receive the very poor transmission point of signal strength signal intensity, to reduce the burden that subscriber equipment is measured.The transmission point that remaining reception signal is enough good constitutes the primary election measuring assembly.

If the upward signal of subscriber equipment can accurately reflect the user's equipment downward channel conditions, then can on primary election measuring assembly basis, further confirm carefully to select measuring assembly.For example, have only base station equipment/some RRH can receive the upward signal of the good subscriber equipment of intensity if find; Or base station equipment/some RRH will get well much than the uplink signal strength that other any transmission points receive subscriber equipment, then carefully select in the measuring assembly only to comprise this base station equipment/RRH.Again for example, put more than one, then carefully select measuring assembly should comprise these transmission points if can receive the transmission of fine subscriber equipment upward signal.

Next, measuring assembly confirms that unit 320 confirms the transmission mode and the corresponding feedback pattern that can provide for subscriber equipment through above definite transmission point.Have only a transmission point in the measuring assembly if carefully select, then can adopt non-CoMP transmission mode by configure user equipment.If should be base station equipment by the transmission point, then the transmission mode of this subscriber equipment can be configured according to the communication means of aforesaid subscriber equipment 105.If should be some RRH by the transmission point, then can adopt transmission mode 9 etc. by configure user equipment.

If carefully select the transmission in the measuring assembly to put more than one, then measuring assembly confirms that unit 320 can compare the intensity of a different transmission subscriber equipment upward signal that receives.If the uplink signal strength difference is less, then can these transmission points be constituted a logical transport point, adopt the network MIMO transmission means, configure user equipment adopts transmission mode 9; If the uplink signal strength difference is bigger, then can adopt the corresponding transmission mode of CoMP transmission means (but because transmission mode 9 itself also can be supported the CoMP transmission means, therefore also configurable is transmission mode 9) by configure user equipment.

The difference of above-mentioned network MIMO and CoMP transmission means is feedback model to a greater extent.Network MIMO is identical with the feedback model of aforementioned single transmission point, only feeds back a corresponding CSI of transmission point, and CoMP then will feed back the corresponding CSI of a plurality of transmission points.

Then, measuring assembly is confirmed the CSI-RS form of unit 320 definite above transmission points of confirming.If carefully select and have only a transmission point in the measuring assembly and be base station equipment, then the CSI-RS form of this transmission point is exactly the CSI-RS form that base station equipment is served the Rel-10 subscriber equipment.If carefully select and have only a transmission point in the measuring assembly and be RRH, then the CSI-RS form of this transmission point is a specific CSI-RS form of this transmission point.If carefully select the transmission in the measuring assembly to put more than one, then decide corresponding C SI-RS form according to the transmission means that is disposed.If transmission means is a network MIMO, then the CSI-RS form has only one, the antennal interface of different transmission points respectively with this CSI-RS form in different CSI-RS ports corresponding this can flexible configuration.For example two transmission points each have 4 antennas, then in the CSI-RS form of configuration 8 CSI-RS ports can be arranged, and wherein port one to 4 is distributed to a transmission point, and port 5 to 8 is distributed to another transmission point.Can certainly dispose has 4 CSI-RS ports in the CSI-RS form, wherein port one to 2 is distributed to a transmission point, and port 3 to 4 is distributed to another transmission point.Yet this assigning process is transparent to subscriber equipment, sees from the subscriber equipment angle, and network MIMO transmission means merchandiser transmission point transmission means is as broad as long.If transmission means is CoMP, then different transmission points has the specific CSI-RS form of the point of transmission separately.The CSI-RS port number of different transmission points can be identical or different.

Then, can send to subscriber equipment through CSI-RS measuring assembly and the relevant parameter that the transmitting element 310 of base station is confirmed measuring assembly dispensing unit 320 as stated.

The transmitting element 310 of base station is configured to send CSI-RS measuring assembly configuration signal to subscriber equipment, and said CSI-RS measuring assembly configuration signal comprises the indication of the CSI-RS measuring assembly of measuring assembly dispensing unit 320 configurations.Correspondingly, the receiving element 210 of subscriber equipment is configured to the reception CSI-RS measuring assembly configuration signal from the base station.

CSI-RS measuring assembly configuration signal has disposed the CSI-RS measuring assembly of subscriber equipment particularly, and this signaling can comprise in the following information one or multinomial:

The number N of the CSI-RS form in the CSI-RS measuring assembly;

CSI-RS reports the number M of the CSI-RS form in the set;

The form of the CSI-RS of each measurement comprises 1) sequence of CSI-RS, 2) quantity of antenna opening, 3) the time-frequency position of CSI-RS in a sub-frame, cycle, sub-frame offset, 4) data and CSI-RS EPRE (the every Resource Unit of power) ratio; Each needs the mourn in silence form of CSI-RS of (muting) of PDSCH, comprises the time-frequency position of this CSI-RS in a sub-frame, cycle, sub-frame offset etc.;

The transmitted power of the RRH equipment that CSI-RS is corresponding; The CRS EPRE ratio of the RRH equipment that CSI-RS is corresponding:

The association biasing (Association Offset) of the transmission point that CSI-RS is corresponding, or the like.

Wherein, the CSI-RS that needs PDSCH to mourn in silence transmits the employed CSI-RS form of point corresponding to other, and the PDSCH of subscriber equipment need vacate on the position of these CSI-RS, to avoid the interference of data to reference signal.Above-mentioned three last selections that can be used for auxiliary uplink power control accurately and report set.The similar cell range expansion of the prior art of coverage that wherein related biasing is used to determine to transmit is a little setovered (Cell Range Expansion Offset) (referring to R1-100810; Cell association analysis in outdoor Hotzone ofheterogeneous networks, Huawei).

The all or part of of certain above-mentioned CSI-RS measuring assembly configuration signal can send to subscriber equipment via RRC signaling, layer 1 signaling, layer 2 signaling etc. or its combination.

Following in addition information can be with CSI-RS measuring assembly configuration signal or as the part of CSI-RS measuring assembly configuration signal, is given subscriber equipment and is received by the receiving element 210 of subscriber equipment by the transmitting element 310 of base station:

Transmission mode that subscriber equipment adopted and feedback model;

The indication of available CSI feedback resources, like the resource indication information of periodicity PUCCH resource or the resource indication information of periodicity or acyclic PUSCH resource etc., the quantity of available CSI feedback resources can be identical with N or M, or the like.

Should note; Under two kinds of situation, need in the CSI-RS measuring assembly, select (down-select) to go out a sub-set down and report set as CSI-RS; The one, measuring assembly confirms that unit 320 can't obtain carefully to select measuring assembly to report set as CSI-RS based on the subscriber equipment upward signal and use, and another is that measuring assembly confirms that unit 320 can't obtain the enough little measuring assembly that carefully selects and use as CSI-RS report set.Therefore; Also need the extra following process of selecting; This process hypothesis measuring assembly confirms that unit 320 confirmed that the CSI-RS form and the notice of N transmission point give subscriber equipment, and each CSI-RS form transmits point (possibly be the logical transport point) corresponding to one in the hypothesis CSI-RS measuring assembly.Because the transmission point is corresponding one by one with the CSI-RS form, in the following description, under the prerequisite that can not obscure, use transmission point and the corresponding CSI-RS form of transmission point sometimes without distinction.In addition owing to need the extra following process of selecting; Confirm in the operation of unit 320 at measuring assembly; Configuration transmission mode, feedback model and feedback resources are dispensable; Therefore in the description below,, suppose that then previous measuring assembly dispensing unit is not configured corresponding object if relate to the configuration of transmission mode, feedback model and feedback resources.

Here CSI-RS report set and CSI-RS measuring assembly can identical (being N=M), the order of subscriber equipment report this moment CSI can be confirmed according to the sequencing that CSI-RS notifies in measuring assembly.And when CSI-RS report set is the subclass (M ∠ N) of CSI-RS measuring assembly, need Signalling exchange to realize reporting the selection of set between subscriber equipment and the base station generally speaking.This will go through following.

As stated, the receiving element 210 of subscriber equipment receives CSI-RS measuring assembly configuration signal from the base station, and it is offered measuring unit 220 further handles.

The measuring unit 220 of subscriber equipment is configured to; The indication of the CSI-RS measuring assembly that receives according to receiving element 210; CSI-RS in the said CSI-RS measuring assembly measures, with the corresponding metric of CSI-RS form in acquisition and the said CSI-RS measuring assembly.

In an embodiment, the metric of measuring unit 220 acquisitions can comprise short-term information and statistical information.One skilled in the art will recognize that other metrics that can also use except that these two kinds of metrics.Short-term information comprises that the channel that measures based on certain CSI-RS calculates the CQI (channel quality indication) of acquisition, PMI (pre-coding matrix indication) etc. under the Closed-Loop Spatial Multiplexing hypothesis; Also comprise based on certain CSI-RS and measure the RSRP (reference signal received energy) that is calculated, RSRQ (Reference Signal Received Quality) etc.The computational methods of the compute classes of RSRP/RSRQ RSRP/RSRQ during like known in the art switch are just replaced original measured signal CRS, and make the proper proportion convergent-divergent with CSI-RS.Statistical information can obtain through the repeatedly CSI-RS of continuous measurement different time.Repeatedly measure the average back of the channel matrix that the obtains CQI that calculating can obtain to add up under the Closed-Loop Spatial Multiplexing hypothesis, PMI etc.RSRP, the RSRQ that repeatedly measures can adopt similar TS 36.300 the 10.6th joint (TS 36.300V10.0.0, Overall description; Stage 2, and E-UTRAN measurement model 3GPP) obtains layer 1 and layer 3 filtered statistics RSRP and RSRQ.

Next, subscriber equipment and base station obtain CSI-RS through sequence of operations and Signalling exchange and report set, and it is according to above-mentioned metric that said CSI-RS reports set, from said CSI-RS measuring assembly, selects.In addition, subscriber equipment and base station are confirmed to report the corresponding CSI feedback resources of CSI-RS form in the set with the CSI-RS that is obtained through sequence of operations and Signalling exchange.These operations are that the report set through subscriber equipment obtains unit 230, feedback resources and confirms that the report set of unit 240 and base station obtains unit 330, feedback resources and confirms that the concrete example of following description that realizes unit 340 explains the concrete operations of these unit and the Signalling exchange between subscriber equipment and the base station.

(example 1)

In this example, the report of subscriber equipment set obtains unit 230 and can cooperate with receiving element 210 and transmitting element 250, obtains CSI-RS and reports set.In this case, the transmitting element 250 of subscriber equipment can be configured to, and the metric that measuring unit 220 is obtained is sent to the base station.Correspondingly, the receiving element 350 of base station can be configured to, and receives said metric from subscriber equipment.

Particularly, the transmitting element 250 of subscriber equipment can through layer 1 PUCCH or aperiodic PUSCH, or the MAC signaling of layer 2, or the RRC signaling of layer 3 or the combination of above-mentioned signaling send to base station equipment with metric.The metric that a plurality of CSI-RS forms the are corresponding combined coding that can join end to end according to the order of measuring assembly notice constitutes a data block and reports together to base station equipment, also can be after adding separately flag information coding separately, report as required and give base station equipment.The former is applicable to PUSCH aperiodic, MAC signaling and RRC signaling, and the latter is applicable to PUSCH aperiodic, PUCCH signaling, MAC signaling and RRC signaling.If employing PUSCH aperiodic sends metric, then aperiodic, the PUSCH resource can be distributed through the RRC signaling by the base station, also can distribute through the uplink assignment of dynamic dispatching, and receive this distribution by receiving element.If adopt MAC signaling or RRC signaling to send metric, then this signaling can periodically be sent, and also can send according to the thresholding trigger-type ground that defines through the RRC signaling in advance.For example when the corresponding RSRP of some CSI-RS forms surpassed a certain thresholding, subscriber equipment was notified the metric relevant with this CSI-RS form to base station equipment through transmitting element 250.

Here, under the situation of above-mentioned M ∠ N, preferably, the transmitting element 250 of subscriber equipment can only feed back M the corresponding metric of best CSI-RS form and give base station equipment.Here preferably can be best on the signal strength signal intensity meaning, also can be best on the space channel orthogonality meaning, and promptly orthogonality is best between the PMI that measures of M CSI-RS.

Notice that being sent in the TDD system of above-mentioned metric can be saved.Base station equipment and RRH equipment can utilize channel reciprocity to obtain descending CSI in the TDD system through the uplink SRS signal that receives, and report set in order to confirm CSI-RS.

The report set of base station equipment obtains unit 330 and can be configured to; Based on the corresponding metric of the CSI-RS form in the CSI-RS measuring assembly of subscriber equipment transmission; Dispatch state with pairing base station equipment of each CSI-RS form and/or RRH combines alternatively; Decision finally can be the transmission point of subscriber equipment service, that is to say that subscriber equipment needs the transmission point of concrete feedback CSI.

In this case, reporting class of operation that set obtains unit 330 is similar to measuring assembly and confirms unit 320.Reporting set acquisition unit 330 is configured to: need to confirm subscriber equipment to report the transmission point of CSI; Confirm the transmission mode and the corresponding feedback pattern that can provide for subscriber equipment through these transmission points; And need to confirm subscriber equipment to report the CSI-RS form of CSI.

Particularly, the metric of reporting the difference transmission point that set obtains can to report according to subscriber equipment unit 330 is confirmed the transmission point of needs subscriber equipment report CSI.For example, enough strong if discovery has only the corresponding CSI-RS form of base station equipment/some RRH to measure the metric (RSRP/RSRQ or CQI) that obtains; Or base station equipment/some RRH CSI-RS form more corresponding than other any transmission points measured the metric (RSRP/RSRQ or CQI) that obtains and all is eager to excel much then to report and should only comprises this base station equipment/RRH in gathering.In another example, put more than one, then report set and should comprise these transmission points if having the very transmission of intensive quantity information (RSRP/RSRQ or CQI).Again for example, in the transmission point of above-mentioned very intensive quantity information (RSRP/RSRQ or CQI), further choose one group of best transmission point of PMI quadrature degree as reporting set.Also for example on above-mentioned selection basis, utilize the dispatch state transmission point that business is very busy of base station equipment and/or RRH from report set, to remove.

The enough strong method of above-mentioned judgement metric (RSRP/RSRQ or CQI) is through comparing above-mentioned metric and predetermined threshold (being similar to handoff procedure of the prior art) to realize, and can (being similar to the handoff procedure under the heterogeneous network environment in the prior art) be considered in aforementioned cell range expansion biasing in the lump.

Next, reporting set obtains unit 330 and confirms the transmission mode and the corresponding feedback pattern that can provide for subscriber equipment through above definite transmission point.Have only a transmission point in the set if report, then can adopt non-CoMP transmission mode by configure user equipment.If should be base station equipment by the transmission point, then the transmission mode of this subscriber equipment can be configured according to the communication means of aforesaid subscriber equipment 105.If should be some RRH by the transmission point, then can adopt transmission mode 9 etc. by configure user equipment.If the transmission of reporting in the set is put more than one, then report set and obtain the intensity (RSRP/RSRQ or CQI) that unit 330 can compare the metric of different transmission points.If the intensity difference is less, then can these transmission points be constituted a logical transport point, adopt the network MIMO transmission means, configure user equipment adopts transmission mode 9; If the intensity difference is bigger, then can adopt the corresponding transmission mode of CoMP transmission means (but because transmission mode 9 itself also can be supported the CoMP transmission means, therefore also configurable is transmission mode 9) by configure user equipment.

The difference of above-mentioned network MIMO and CoMP transmission means is on the feedback model to a greater extent.Network MIMO is identical with the feedback model of the single transmission point in front, only feeds back a corresponding CSI of transmission point, and CoMP then will feed back the corresponding CSI of a plurality of transmission points.

Then, reporting set acquisition unit 330 need to confirm subscriber equipment to report the CSI-RS form of the transmission point of CSI.If report and to have only a transmission point in the set and be base station equipment, then the CSI-RS form of this transmission point is exactly the CSI-RS form that base station equipment is served the Rel-10 subscriber equipment.If report and to have only a transmission point in the set and be RRH, then the CSI-RS form of this transmission point is a specific CSI-RS form of this transmission point.If the transmission of reporting in the set is put more than one, then decide corresponding C SI-RS form according to the transmission means that is disposed.If transmission means is a network MIMO, then the CSI-RS form has only one, the antennal interface of different transmission points respectively with this CSI-RS form in different CSI-RS ports corresponding, this can flexible configuration.For example two transmission points each have 4 antennas, then in the CSI-RS form of configuration 8 CSI-RS ports can be arranged, and wherein port one to 4 is distributed to a transmission point, and port 5 to 8 is distributed to another transmission point.Can certainly dispose have in the CSI-RS form 4 CSI-RS ports wherein port one to 2 distribute to one the transmission point, port 3 to 4 distribute to another the transmission point.Yet this assigning process is transparent to subscriber equipment, sees from the subscriber equipment angle, and network MIMO transmission means merchandiser transmission point transmission means is as broad as long.If transmission means is CoMP, then different transmission points has the specific CSI-RS form of the point of transmission separately.The CSI-RS port number of different transmission points can be identical or different.

Can find out; The CSI-RS form that subscriber equipment is given in configuration in the CSI-RS measuring assembly and CSE-RS report in the set configuration and give user's CSI-RS form possibility different; The CSI-RS form also might be different with the corresponding relation of transmission point, these can by the base station neatly the CSI-RS form of configuration logic transmission point realize.Concerning subscriber equipment, the CSI-RS form of seeing that just needs measurement or measure and report, rather than transmission point.

In other words, the report of base station set obtains unit 330 and is configured to, and according to the metric that receives, from the CSI-RS measuring assembly, selects CSI-RS to report set.Then, the transmitting element 310 of base station sends CSI-RS to subscriber equipment and reports the set configuration signaling; Wherein, said CSI-RS report set configuration signaling comprises reporting the indication of the CSI-RS form in the CSI-RS report set of selecting set acquisition unit 330.

The content that CSI-RS reports the set configuration signaling can comprise in the following information one or multinomial:

Report the number M of the CSI-RS form in the set ', M ' can be identical or different with the indicated M of CSI-RS measuring assembly configuration signal, can also indicate subscriber equipment need feed back the quantity of the CSI-RS form of CSI more neatly more accurately like this;

The information of the individual CSI-RS form of M '; If these forms have been present among the indicated measuring assembly of CSI-RS measuring assembly configuration signal; Then only need to get final product through its sequence number indication in measuring assembly; If newly-increased CSI-RS form (for example the CSI-RS form or because the CSI-RS form that the setting of logical transport point is changed of the transmission point known through other approach of subscriber equipment) is arranged, then need specifically to indicate the concrete form of these CSI-RS forms.

In addition, following information can be reported the set configuration signaling or report the part of set configuration signaling as CSI-RS with CSI-RS, is given subscriber equipment and is received by the receiving element 210 of subscriber equipment by the transmitting element 310 of base station:

Transmission mode that subscriber equipment adopted and feedback model;

Correspondingly; The receiving element 210 of subscriber equipment can be configured to; Receive CSI-RS from the base station and report the set configuration signaling, wherein, said CSI-RS reports the indication that the set configuration signaling comprises that CSI-RS that the base station is selected according to said metric reports the CSI-RS form in the set.

Then, the report of subscriber equipment set obtains unit 230 and can obtain CSI-RS report set according to the CSI-RS report set configuration signaling that receiving element 210 receives.In other words, reporting signaling that set obtains can to send according to the transmitting element 310 of base station unit 230 indicates and obtains CSI-RS and report set.

In addition, in this example, the feedback resources of base station confirms that unit 340 can be configured to, and confirms to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS.The transmitting element 310 of base station also is configured to, and sends CSI feedback resources configuration signal to subscriber equipment, and said CSI feedback resources configuration signal comprises the indication of feedback resources being confirmed the CSI feedback resources that unit 340 is confirmed.

Correspondingly, the feedback resources of subscriber equipment confirm unit 240 can with receiving element 210 cooperation, confirm the CSI feedback resources.In this case, receiving element 210 can also be configured to, and receives CSI feedback resources configuration signal from the base station, and said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report.

Particularly; CSI feedback resources configuration signal can comprise and the number M of reporting the CSI-RS form in the set ' configuration information of corresponding CSI feedback resources, like the resource indication information of the individual periodicity PUCCH resource of M ' or the resource indication information of 1 periodicity or acyclic PUSCH resource; And the individual CSI-RS form of M ' measures the CSI and the corresponding relation between the CSI feedback resources of gained, when adopting PUCSH to transmit the CSI of combined coding, and the indication that the sequencing of the CSI that measures gained with different CSI-RS forms when combined coding is correlated with.

Correspondingly, the feedback resources of subscriber equipment confirms that unit 240 can be configured to, and confirms the CSI feedback resources according to the CSI feedback resources configuration signal that receiving element 210 receives.

Be noted herein that above-mentioned CSI-RS reports the set configuration signaling and preferably can use the RRC signaling to realize with CSI feedback resources configuration signal, but also do not get rid of the signaling that adopts layer 1 and/or layers 2 or unite and use the signaling of different layers to realize.It should be noted that in reality realizes above-mentioned CSI-RS reports set configuration signaling and CSI feedback resources configuration signal and can use identical or different RRC signaling, layer 1 signaling, layer 2 signaling or its to make up to realize.For example; If CSI-RS measuring assembly configuration signal comprised can the CSI feedback resources indication; Then can use layer 2 MAC COMMAND signaling to realize that CSI-RS reports set configuration signaling and CSI feedback resources configuration signal, with the information of the individual CSI-RS form of indication M ' and wherein the corresponding CSI of each CSI-RS form feed back the used sequence number of resource in the indication of above-mentioned available CSI feedback resources etc.For example can use layer 2 MAC COMMAND signaling to realize that CSI-RS reports the set configuration signaling again, with the information of indicating the individual CSI-RS form of M ' for example etc.; And use the RRC signaling of layer 3 to realize CSI feedback resources configuration signal, with indication for example with the information of the corresponding CSI feedback resources of the individual CSI-RS form of M ' etc.

In addition, an implementation method of the MAC COMMAND signaling here is to reuse existing carrier wave in LTE Rel-10 carrier aggregation to activate (activation) and close (deactivation) signaling, and member carrier is wherein replaced with the CSI-RS form.

(example 2)

In this example, the report of subscriber equipment set acquisition unit 230 can confirm voluntarily that CSI-RS reports set.In this case, report set acquisition unit 230 and be configured to,, from said CSI-RS measuring assembly, select CSI-RS to report set according to said metric.

Particularly, report set and obtain unit 230, confirm that CSI-RS reports set according to the metric that measuring unit 220 obtains.The report set of confirming base station equipment in concrete mode that CSI-RS reports set and the example 1 obtains unit 330, and to confirm that CSI-RS report the mode of set similar, and it is definite at the subscriber equipment place that difference only is that CSI-RS reports set.

Correspondingly, the report of base station set obtains unit 330 and can cooperate with receiving element 350, confirms that CSI-RS reports set.In this case; The receiving element 350 of base station also is configured to; Receive CSI-RS from subscriber equipment and report the set notice signaling, said CSI-RS report set notice signaling comprises selects CSI-RS to report the indication of set to subscriber equipment according to said metric, from said CSI-RS measuring assembly.Then, the report of base station set obtains unit 340 and can report the set notice signaling according to the CSI-RS that receiving element 350 receives and obtain CSI-RS and report set.

In this example, the feedback resources of subscriber equipment confirm unit 240 can with receiving element 210 and transmitting element 250 cooperations, confirm the CSI feedback resources.In this case, the transmitting element 250 of subscriber equipment can be configured to, and sends CSI-RS to the base station and reports the set notice signaling, and said CSI-RS reports the set notice signaling and comprises that the CSI-RS that subscriber equipment is selected reports the indication of set.Correspondingly, the receiving element 350 of base station also is configured to, and receives CSI-RS from subscriber equipment and reports the set notice signaling.

Particularly, the transmitting element 250 of subscriber equipment is reported the set notice signaling through CSI-RS, will report the indication of gathering to determined CSI-RS and send base station equipment to.CSI-RS reports the set notice signaling can comprise one or more in the following information:

CSI-RS reports the number M of the CSI-RS form in the set ', M ' can be identical or different with the indicated M of CSI-RS measuring assembly configuration signal;

The information of the individual CSI-RS form of M '; If these forms have been present among the indicated measuring assembly of CSI-RS measuring assembly configuration signal; Then only need to get final product through its sequence number indication in measuring assembly; If newly-increased CSI-RS form is arranged, then need the concrete form of concrete these CSI-RS forms of indication.

Preferably, CSI-RS reports the set notice signaling and can realize through the RRC signaling, but does not get rid of the possibility that adopts layer 1 and/or layer 2 signaling.For example, can adopt similar above-mentioned existing carrier wave in LTE Rel-10 carrier aggregation to activate the method with shutoff operation, utilize MACCOMMAND to realize that the selection of reporting set selects with cancellation.

Preferably, CSI-RS reports the set notice signaling and can use the MACCOMMAND of layer 2 to realize, concrete implementation method can adopt carrier wave activation and the implementation method of closing in the aforesaid carrier aggregation.Certainly do not arrange yet and adopt the RRC signaling of removing layer 1 and/or layer 3 or realize that CSI-RS reports the set notice signaling method that each layer signaling united notice.For example; If adopt the PUCCH signaling of layer 1 to realize; Implementation method is that the corresponding sequence number of CSI-RS form in the CSI-RS measuring assembly that CSI-RS reports in the set is loaded in the interior perhaps signal that some CSI feedback resources are fed back through the whole bag of tricks, and the detection through the base station realizes that indirectly CSI-RS reports the notice of set.These methods comprise: the corresponding sequence number of CSI-RS form and all or part of content combination of CSI feedback are encoded; The sequence of the corresponding sequence number of CSI-RS form and CSI are fed back all or part of content carry out the scrambler operation; The sequence of the corresponding sequence number of CSI-RS form and the CSI feedback content behind all or part of coding carried out the scrambler operation; The corresponding sequence number of CSI-RS form is fed back as the part of CSI feedback content.For example can be with the corresponding sequence number of CSI-RS form and the RI combined coding of non-service cell, the RI that perhaps direct sequence number with CSI-RS replaces non-service cell feeds back to base station equipment.Transmitting element 250 can be configured to realize by the way corresponding signaling and feedback.

At the base station equipment place, report set and obtain unit 330 and be configured to, the CSI-RS that receives according to receiving element 350 reports the set notice signaling and obtains CSI-RS and report set.Then, as stated, the feedback resources of base station confirms that unit 340 can confirm to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS.The transmitting element 310 of base station also is configured to, and sends CSI feedback resources configuration signal to subscriber equipment, and said CSI feedback resources configuration signal comprises the indication of feedback resources being confirmed the CSI feedback resources that unit 340 is confirmed.

Correspondingly; The receiving element 210 of subscriber equipment can be configured to; Receive CSI feedback resources configuration signal from the base station, said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report.Particularly; Described in above example 1; CSI feedback resources configuration signal can comprise and the number M of reporting the CSI-RS form in the set ' configuration information of corresponding CSI feedback resources, like the resource indication information of the individual periodicity PUCCH resource of M ' or the resource indication information of 1 periodicity or acyclic PUSCH resource; And the individual CSI-RS form of M ' measures the CSI and the corresponding relation between the CSI feedback resources of gained, when adopting PUCSH to transmit the CSI of combined coding, and the indication that the sequencing of the CSI that measures gained with different CSI-RS forms when combined coding is correlated with.

Correspondingly, the feedback resources of subscriber equipment confirms that unit 240 can be configured to, and confirms to report the corresponding CSI feedback resources of the CSI-RS form CSI feedback resources in the set with CSI-RS according to the CSI feedback resources configuration signal that receiving element 210 receives.

(example 3)

This example is that with the difference of above-mentioned example 2 in this example, the feedback resources of subscriber equipment is confirmed the definite voluntarily required CSI feedback resources in unit 240.

In this example, as stated, send and comprise and indication available CSI feedback resources by the CSI-RS measuring assembly configuration signal that the receiving element 210 of subscriber equipment receives by the transmitting element of base station 310.

Therefore the feedback resources of subscriber equipment confirms that unit 240 can be configured to, and according to the indication to available CSI feedback resources, confirms to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS.

In this case, the transmitting element 250 of subscriber equipment can also be configured to, and sends CSI feedback resources notice signaling to the base station, and said CSI feedback resources notice signaling comprises the indication of feedback resources being confirmed the CSI feedback resources that the unit is confirmed.

Particularly, CSI feedback resources notice signaling can comprise with CSI-RS and reports the sequence number in the indication of the corresponding available CSI feedback resources of CSI feedback resources in CSI-RS measuring assembly configuration signal of each CSI-RS form in the set.

The available CSI feedback resources of indicating in the CSI-RS measuring assembly configuration signal is abundant; For example quantity is identical with N; Then can directly set up the corresponding relation between CSI feedback resources and the corresponding sequence number of CSI-RS form in the CSI-RS measuring assembly, base station equipment obtains CSI-RS through the CSI feedback resources that detects subscriber equipment and adopt and reports set.

Correspondingly; The receiving element 350 of base station is configured to; Receive CSI feedback resources notice signaling from subscriber equipment; Said CSI feedback resources notice signaling comprises that said CSI feedback resources is that subscriber equipment is according to the indication of available CSI feedback resources is confirmed to the indication of the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report.Then, the feedback resources of base station confirms that unit 340 confirms the CSI feedback resources according to the CSI feedback resources notice signaling that receiving element 350 receives.

The transmitting element 250 of subscriber equipment also is configured to, and uses feedback resources to confirm the CSI feedback resources that unit 240 is confirmed, reports the corresponding CSI of CSI-RS form in the set to base station feedback and said CSI-RS.Particularly, subscriber equipment (for example using measuring unit 220) is measured the CSI that CSI-RS reports each the CSI-RS form in the set, and uses feedback resources to confirm these CSI of CSI feedback resources feedback that confirm unit 240.Correspondingly, the receiving element 350 of base station receives the feedback of reporting the corresponding CSI of CSI-RS form the set with said CSI-RS from subscriber equipment.

More than though function and the operation of subscriber equipment under the CoMP transmission means mainly described, yet as stated, subscriber equipment of the present invention is not limited only under the CoMP transmission means, operate, and also is applicable to the degeneration scene (like unicast) of CoMP.For example, be in base station equipment 101 like the subscriber equipment among Fig. 1 106 and cover down with uniting of RRH 102, the difference of it and subscriber equipment 105 is that it is the subscriber equipment of LTE Rel-11, with the difference of subscriber equipment 107 be that it does not adopt the CoMP transmission method.Because subscriber equipment 106 does not adopt the CoMP transmission method; Event need be selected the actual transmissions point of the corresponding transmission point of CSI-RS form as the specific control channel of data channel and subscriber equipment in the CSI-RS measuring assembly, or is called association and transmits point (Associated Transmission Point).In this case; The operation of subscriber equipment 106 is identical with the operation of above-mentioned subscriber equipment 107; Just the report of subscriber equipment 106 set obtains CSI-RS that unit 230 obtains and reports set and only comprise and the corresponding CSI-RS form of related transmission point, and feedback resources confirms that unit 240 only confirms to be used to feed back the feedback resources with the corresponding CSI of this CSI-RS form.Therefore, subscriber equipment 106 can be used as subscriber equipment according to the present invention to report set sizes M at CSI-RS is that a special case under 1 the situation realizes.

More than be that example is described according to subscriber equipment of the present invention with aforementioned scene 4 corresponding communication systems, but embodiments of the invention are not limited thereto.LTE Rel-11 and later version also possibly be deployed in scene 1,2 or 3; The difference of these scenes and scene 4 is that each transmission point has independently sub-district ID; But with regard to the CSI-RS form, having independently, sub-district ID just just has independently CSI-RS form, so those skilled in the art expect easily naturally; Whether thought of the present invention does not have same cells ID to the CSI-RS form and rely on the pairing transmission point of CSI-RS form.Therefore, also be applicable to aforementioned scene 1,2 and 3 pairing communication systems according to subscriber equipment of the present invention.

It should be noted that in addition because subscriber equipment can move in the sub-district, so the detected measuring assembly of base station equipment can change.Therefore, in CSI-RS measuring assembly configuration signal, can dynamically increase, reduce, change the CSI-RS form of measuring for subscriber equipment.Report in set configuration signaling, the CSI-RS report set notice signaling at CSI-RS, can dynamically increase, reduce, change the CSI-RS form of reporting.

The signaling that relates among the present invention utilized in the LTE technology existing signaling (comprise layer 1 PUCCH or aperiodic PUSCH, or the MAC signaling of layer 2, or the RRC signaling of layer 3) basic format.The content of signaling described in the invention will be carried in the mode of load in the existing signaling format, between base station equipment and subscriber equipment, transmit, to realize function of the present invention.

The following flow chart of describing the embodiment of channel condition information of the present invention (CSI) feedback method with reference to accompanying drawing.In the following description, for clear, method of the present invention is described in conjunction with the specific embodiment of above subscriber equipment and base station.Yet; Those skilled in the art will recognize that; Explain that in conjunction with the specific functional units of above subscriber equipment and base station method of the present invention only is for illustrative purpose; Come in the for example program of using a computer under the situation of implementation method, do not need the division of this functional unit and assembly fully, but subscriber equipment is made the as a whole method of the present invention that realizes.

Fig. 4 has illustrated according to the flow chart of the embodiment of CSI feedback method 400 of the present invention.CSI feedback method according to this embodiment can be carried out at the subscriber equipment place.This method may further comprise the steps:

In step 401, the receiving element 210 of subscriber equipment is receiving channel state information reference signal CSI-RS measuring assembly configuration signal from the base station, and said CSI-RS measuring assembly configuration signal comprises the indication to the CSI-RS measuring assembly of user device configuration;

In step 402, the measuring unit 220 of subscriber equipment is measured the CSI-RS in the said CSI-RS measuring assembly according to the indication of said CSI-RS measuring assembly, with the corresponding metric of CSI-RS form in acquisition and the said CSI-RS measuring assembly;

In step 403, the report of subscriber equipment set obtains unit 230 and obtains CSI-RS report set, and it is according to said metric that said CSI-RS reports set, from said CSI-RS measuring assembly, selects;

In step 404, the feedback resources of subscriber equipment confirms that unit 240 is confirmed and said CSI-RS reports the corresponding CSI feedback resources of CSI-RS form in the set; And

In step 405, the transmitting element 250 of subscriber equipment uses determined CSI feedback resources, reports the corresponding CSI of CSI-RS form in the set to base station feedback and said CSI-RS.

Preferably, the step 403 of acquisition CSI-RS report set comprises:

The transmitting element 250 of subscriber equipment is sent to the base station with said metric; And

The receiving element 210 of subscriber equipment receives CSI-RS and reports the set configuration signaling from the base station, the report set acquisition unit 230 of subscriber equipment obtains CSI-RS according to said CSI-RS report set configuration signaling and reports set;

Wherein, said CSI-RS reports the indication that the set configuration signaling comprises that CSI-RS that the base station is selected according to said metric reports the CSI-RS form in the set.

Preferably, the step 404 of confirming the CSI feedback resources comprises:

The receiving element 210 of subscriber equipment receives CSI feedback resources configuration signal from the base station, said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report;

The feedback resources of subscriber equipment confirms that unit 240 confirms the CSI feedback resources according to the CSI feedback resources configuration signal that is received.

Preferably, the step 403 of acquisition CSI-RS report set comprises:

The report set of subscriber equipment obtains unit 230 according to said metric, from said CSI-RS measuring assembly, selects CSI-RS to report set.

Preferably, the step 404 of confirming the CSI feedback resources comprises:

The transmitting element 250 of subscriber equipment sends CSI-RS to the base station and reports the set notice signaling, and said CSI-RS reports the set notice signaling and comprises that the CSI-RS that subscriber equipment is selected reports the indication of set;

The receiving element 210 of subscriber equipment receives CSI feedback resources configuration signal from the base station, said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report; And

Preferably in step 401, said CSI-RS measuring assembly configuration signal also comprises and indication to available CSI feedback resources.

Preferably, the step 404 of confirming the CSI feedback resources comprises:

The feedback resources of subscriber equipment is confirmed unit 240 according to the indication to available CSI feedback resources, confirms to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS;

Said method also comprises:

The transmitting element 250 of subscriber equipment sends CSI feedback resources notice signaling to the base station, and said CSI feedback resources notice signaling comprises the indication to determined CSI feedback resources.

Fig. 5 has illustrated according to the flow chart of the embodiment of CSI feedback method 500 of the present invention.CSI feedback method according to this embodiment can be carried out at the base station equipment place.This method may further comprise the steps:

In step 501, the measuring assembly dispensing unit 320 of base station is to user device configuration channel state information reference signals CSI-RS measuring assembly, and said CSI-RS measuring assembly comprises the CSI-RS form that subscriber equipment will be measured;

In step 502, the transmitting element 310 of base station sends CSI-RS measuring assembly configuration signal to subscriber equipment, and said CSI-RS measuring assembly configuration signal comprises the indication of CSI-RS measuring assembly dispensing unit to the CSI-RS measuring assembly of user device configuration;

In step 503; The report set of base station obtains unit 330 and obtains CSI-RS report set; Wherein, it is according to subscriber equipment the CSI-RS in the said CSI-RS measuring assembly to be measured the metric that obtains that said CSI-RS reports set, from said CSI-RS measuring assembly, selects;

In step 504, the feedback resources of base station confirms that unit 340 is confirmed and said CSI-RS reports the corresponding CSI feedback resources of CSI-RS form in the set; And

In step 505, the receiving element 350 of base station receives the feedback of reporting the corresponding CSI of CSI-RS form the set with said CSI-RS from subscriber equipment.

Preferably, the step 503 of acquisition CSI-RS report set comprises:

The receiving element 350 of base station receives said metric from subscriber equipment;

The report set of base station obtains unit 330 according to said metric, from said CSI-RS measuring assembly, selects CSI-RS to report set;

Said method also comprises:

The transmitting element 310 of base station sends CSI-RS to subscriber equipment and reports the set configuration signaling;

Wherein, said CSI-RS report set configuration signaling comprises the indication of selected CSI-RS being reported the CSI-RS form in the set.

Preferably, the step 503 of acquisition CSI-RS report set comprises:

The receiving element 350 of base station receives CSI-RS from subscriber equipment and reports the set notice signaling, and said CSI-RS report set notice signaling comprises selects CSI-RS to report the indication of set to subscriber equipment according to said metric, from said CSI-RS measuring assembly;

The report set of base station obtains unit 330 and obtains said CSI-RS report set according to said CSI-RS report set notice signaling.

Preferably, the step 504 of confirming the CSI feedback resources comprises:

The feedback resources of base station confirms that unit 340 is confirmed and said CSI-RS reports the corresponding CSI feedback resources of CSI-RS form in the set;

Said method also comprises:

The transmitting element 310 of base station sends CSI feedback resources configuration signal to subscriber equipment, and said CSI feedback resources configuration signal comprises the indication to determined CSI feedback resources.

Preferably, in step 502, said CSI-RS measuring assembly configuration signal also comprise with to the indication of available CSI feedback resources.

Preferably, the step 504 of confirming the CSI feedback resources comprises:

The receiving element 350 of base station receives CSI feedback resources notice signaling from subscriber equipment; Said CSI feedback resources notice signaling comprises that said CSI feedback resources is that subscriber equipment is according to the indication of available CSI feedback resources is confirmed to the indication of the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report;

The feedback resources of base station confirms that unit 340 confirms the CSI feedback resources according to said CSI feedback resources notice signaling.

Should be noted in the discussion above that in above description,, show technical scheme of the present invention, but be not intended that the invention be limited to above-mentioned steps and cellular construction only with the mode of example.Under possible situation, can adjust and accept or reject step and cellular construction as required.Therefore, some step and unit are not the necessary element of overall invention thought of embodiment of the present invention.Therefore, technical characterictic essential to the invention only is subject to the minimum requirements that can realize overall invention thought of the present invention, and does not receive the restriction of above instantiation.

In above description, enumerated a plurality of instances, though the inventor indicates instance associated with each other as much as possible, this does not also mean that must there be corresponding relation in these instances according to described mode.As long as selected instance do not have contradiction between given condition, can select not corresponding instance to constitute the corresponding techniques scheme, such technical scheme also should be regarded as within the scope of the invention involved.

So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that those skilled in the art can carry out various other change, replacement and interpolations under the situation that does not break away from the spirit and scope of the present invention.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited accompanying claims.

Claims

1. channel condition information CSI feedback method may further comprise the steps:

The receiving channel state information reference signal CSI-RS measuring assembly configuration signal from the base station, said CSI-RS measuring assembly configuration signal comprise the indication to the CSI-RS measuring assembly of said user device configuration;

According to the indication of said CSI-RS measuring assembly, the CSI-RS in the said CSI-RS measuring assembly is measured, with the corresponding metric of CSI-RS form in acquisition and the said CSI-RS measuring assembly;

Obtain CSI-RS and report set, said CSI-RS reports set and selects from said CSI-RS measuring assembly according to said metric;

Confirm to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS; And

Use determined CSI feedback resources, report the corresponding CSI of CSI-RS form in the set to base station feedback and said CSI-RS.

2. CSI feedback method according to claim 1, wherein, said metric comprises following at least one: channel quality indicator (CQI), pre-coding matrix indication PMI, reference signal received energy RSRP and Reference Signal Received Quality RSRQ.

3. CSI feedback method according to claim 1, wherein, the step that obtains CSI-RS report set comprises:

Said metric is sent to the base station; And

Receive CSI-RS from the base station and report the set configuration signaling, and obtain CSI-RS report set according to said CSI-RS report set configuration signaling;

4. CSI feedback method according to claim 3, wherein, confirm that the step of CSI feedback resources comprises:

Receive CSI feedback resources configuration signal from the base station, said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report;

CSI feedback resources configuration signal according to being received is confirmed the CSI feedback resources.

5. CSI feedback method according to claim 1, wherein, the step that obtains CSI-RS report set comprises:

According to said metric, from said CSI-RS measuring assembly, select CSI-RS to report set.

6. CSI feedback method according to claim 5, wherein, confirm that the step of CSI feedback resources comprises:

Send CSI-RS to the base station and report the set notice signaling, said CSI-RS reports the set notice signaling and comprises that the CSI-RS that subscriber equipment is selected reports the indication of set;

Receive CSI feedback resources configuration signal from the base station, said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report; And

7. CSI feedback method according to claim 1, wherein, said CSI-RS measuring assembly configuration signal also comprise with to the indication of available CSI feedback resources.

8. CSI feedback method according to claim 7 wherein, confirms that the step of CSI feedback resources comprises: according to the indication to available CSI feedback resources, confirm to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS;

Said method also comprises:

Send CSI feedback resources notice signaling to the base station, said CSI feedback resources notice signaling comprises the indication to determined CSI feedback resources.

9. subscriber equipment comprises:

Receiving element, the receiving channel state information reference signal CSI-RS measuring assembly configuration signal from the base station, said CSI-RS measuring assembly configuration signal comprise the indication to the CSI-RS measuring assembly of said user device configuration;

Measuring unit, the indication of the CSI-RS measuring assembly that receives according to receiving element is measured the CSI-RS in the said CSI-RS measuring assembly, with obtain with said CSI-RS measuring assembly in the corresponding metric of CSI-RS form;

Report set and obtain the unit, obtain CSI-RS and report set, it is according to said metric that said CSI-RS reports set, from said CSI-RS measuring assembly, selects;

Feedback resources is confirmed the unit, confirms that the CSI-RS that obtains with report set acquisition unit reports the corresponding CSI feedback resources of CSI-RS form in gathering; And

Transmitting element uses feedback resources to confirm the CSI feedback resources that the unit is confirmed, reports the corresponding CSI of CSI-RS form in the set to base station feedback and said CSI-RS.

10. subscriber equipment according to claim 9, wherein, said metric comprises following at least one: channel quality indicator (CQI), pre-coding matrix indication PMI, reference signal received energy RSRP and Reference Signal Received Quality RSRQ.

11. subscriber equipment according to claim 9, wherein,

Transmitting element also is configured to said metric is sent to the base station;

Receiving element also is configured to receive CSI-RS from the base station and reports the set configuration signaling; And

The report set obtains the unit and is configured to, and the CSI-RS report set configuration signaling that receives according to receiving element obtains CSI-RS report set;

12. subscriber equipment according to claim 11, wherein,

Receiving element also is configured to receive CSI feedback resources configuration signal from the base station, and said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report;

Feedback resources confirms that the unit is configured to confirm the CSI feedback resources according to the CSI feedback resources configuration signal that receiving element receives.

13. subscriber equipment according to claim 9, wherein,

Report set acquisition unit and be configured to, from said CSI-RS measuring assembly, select CSI-RS to report set according to said metric.

14. subscriber equipment according to claim 13, wherein,

Transmitting element also is configured to send CSI-RS to the base station and reports the set notice signaling, and said CSI-RS reports the set notice signaling and comprises that the CSI-RS that subscriber equipment is selected reports the indication of set;

Receiving element also is configured to receive CSI feedback resources configuration signal from the base station, and said CSI feedback resources configuration signal comprises the indication to the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report; And

15. subscriber equipment according to claim 9, wherein, said CSI-RS measuring assembly configuration signal also comprise with to the indication of available CSI feedback resources.

16. subscriber equipment according to claim 15, wherein,

Feedback resources confirms that the unit is configured to according to the indication to available CSI feedback resources, confirms to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS;

Transmitting element also is configured to send CSI feedback resources notice signaling to the base station, and said CSI feedback resources notice signaling comprises the indication of feedback resources being confirmed the CSI feedback resources that the unit is confirmed.

17. a channel condition information CSI feedback method may further comprise the steps:

To user device configuration channel state information reference signals CSI-RS measuring assembly, said CSI-RS measuring assembly comprises the CSI-RS form that said subscriber equipment will be measured;

Send the indication that the said CSI-RS measuring assembly of CSI-RS measuring assembly configuration signal configuration signal comprises the CSI-RS measuring assembly that is disposed to subscriber equipment;

Obtain CSI-RS and report set, wherein, it is according to subscriber equipment the CSI-RS in the said CSI-RS measuring assembly to be measured the metric that obtains that said CSI-RS reports set, from said CSI-RS measuring assembly, selects;

Receive the feedback of reporting the corresponding CSI of CSI-RS form the set with said CSI-RS from subscriber equipment.

18. CSI feedback method according to claim 17, wherein, said metric comprises following at least one: channel quality indicator (CQI), pre-coding matrix indication PMI, reference signal received energy RSRP and Reference Signal Received Quality RSRQ.

19. CSI feedback method according to claim 17, wherein, the step that obtains CSI-RS report set comprises: receive said metric from subscriber equipment; And, from said CSI-RS measuring assembly, select CSI-RS to report set according to said metric;

Said method also comprises:

Send CSI-RS to subscriber equipment and report the set configuration signaling;

20. CSI feedback method according to claim 17, wherein, the step that obtains CSI-RS report set comprises:

Receive CSI-RS from subscriber equipment and report the set notice signaling, said CSI-RS report set notice signaling comprises selects CSI-RS to report the indication of set to subscriber equipment according to said metric, from said CSI-RS measuring assembly;

Report the set notice signaling according to said CSI-RS and obtain said CSI-RS report set.

21. CSI feedback method according to claim 17 wherein, confirms that the step of CSI feedback resources comprises:

Confirm to report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS;

Said method also comprises:

Send CSI feedback resources configuration signal to subscriber equipment, said CSI feedback resources configuration signal comprises the indication to determined CSI feedback resources.

22. CSI feedback method according to claim 17, wherein, said CSI-RS measuring assembly configuration signal also comprise with to the indication of available CSI feedback resources.

23. CSI feedback method according to claim 22 wherein, confirms that the step of CSI feedback resources comprises:

Receive CSI feedback resources notice signaling from subscriber equipment; Said CSI feedback resources notice signaling comprises that said CSI feedback resources is that subscriber equipment is according to the indication of available CSI feedback resources is confirmed to the indication of the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report;

Confirm the CSI feedback resources according to said CSI feedback resources notice signaling.

24. a base station comprises:

The measuring assembly dispensing unit comprises the CSI-RS form that said subscriber equipment will be measured to the said CSI-RS measuring assembly of user device configuration channel state information reference signals CSI-RS measuring assembly;

Transmitting element sends CSI-RS measuring assembly configuration signal to subscriber equipment, and said CSI-RS measuring assembly configuration signal comprises the indication of the CSI-RS measuring assembly of CSI-RS measuring assembly dispensing unit configuration;

Report set and obtain the unit, obtain CSI-RS and report set, wherein, it is according to subscriber equipment the CSI-RS in the said CSI-RS measuring assembly to be measured the metric that obtains that said CSI-RS reports set, from said CSI-RS measuring assembly, selects;

Receiving element receives the feedback of reporting the corresponding CSI of CSI-RS form the set with said CSI-RS from subscriber equipment.

25. base station according to claim 24, wherein, said metric comprises following at least one: channel quality indicator (CQI), pre-coding matrix indication PMI, reference signal received energy RSRP and Reference Signal Received Quality RSRQ.

26. base station according to claim 23, wherein,

Receiving element also is configured to receive said metric from subscriber equipment;

Report set acquisition unit and be configured to, from said CSI-RS measuring assembly, select CSI-RS to report set according to said metric;

Transmitting element also is configured to send CSI-RS to subscriber equipment and reports the set configuration signaling;

Wherein, said CSI-RS report set configuration signaling comprises reporting the indication of the CSI-RS form in the CSI-RS report set of selecting set acquisition unit.

27. base station according to claim 23, wherein,

Receiving element also is configured to receive CSI-RS from subscriber equipment and reports the set notice signaling, and said CSI-RS report set notice signaling comprises selects CSI-RS to report the indication of set to subscriber equipment according to said metric, from said CSI-RS measuring assembly;

Reporting set obtains CSI-RS that the unit is configured to receive according to receiving element and reports the set notice signaling and obtain CSI-RS and report set.

28. base station according to claim 23, wherein,

Feedback resources confirms that the unit is configured to confirm report the corresponding CSI feedback resources of CSI-RS form in the set with said CSI-RS;

Transmitting element also is configured to send CSI feedback resources configuration signal to subscriber equipment, and said CSI feedback resources configuration signal comprises the indication of feedback resources being confirmed the CSI feedback resources that the unit is confirmed.

29. base station according to claim 23, wherein, said CSI-RS measuring assembly configuration signal also comprise with to the indication of available CSI feedback resources.

30. base station according to claim 29, wherein,

Receiving element is configured to receive CSI feedback resources notice signaling from subscriber equipment; Said CSI feedback resources notice signaling comprises that said CSI feedback resources is that subscriber equipment is according to the indication of available CSI feedback resources is confirmed to the indication of the corresponding CSI feedback resources of CSI-RS form in gathering with said CSI-RS report;

Feedback resources confirms that the unit is configured to confirm the CSI feedback resources according to the CSI feedback resources notice signaling that receiving element receives.