CN102170334A - Method and device for obtaining channel quality indication information - Google Patents
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Abstract
The invention discloses a method and a device for obtaining channel quality indication information. The method comprises the following steps: a CSI (channel state information) reference resource which is sent by a base station is received by a relay node; a CSI-RS (channel state information-reference signal) corresponding to the CSI reference resource and/or CRS (cell relay service) is measured by the relay node; a CQI (channel quality information) valve corresponding to the CSI reference resource is determined by the relay node according to the measured result; and the condition that a resource element in the CSI reference resource is not occupied by a R-PDCCH (relay-physical downlink control channel) is assumed, or, the condition that the resource element in the CSI reference resource is not configured for the R-PDCCH is assumed, the CQI valve is reported to the base station by the relay node. The problem that the accurate channel quality indication information can not be obtained without considering the existence of the R-PDCCH by the relay node in the existing system, therefore, the system flexibility and performance are reduced is solved by the method, and the effect of obtaining the channel quality indication information accurately and improving the system flexibility and performance are achieved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of acquisition methods and device of channel quality indication (CQI) information.
Background technology
In wireless communication technology, (for example the Node B of evolution is eNodeB to base station side, be called for short eNB) when using many antenna transmission data, can take the mode of spatial reuse to improve message transmission rate, promptly use identical running time-frequency resource in the different different data of aerial position emission at transmitting terminal, receiving terminal (for example subscriber equipment (UserEquipment is called for short UE)) also uses many antennas to receive data.Under single user's situation, the resource of all antennas is all distributed to same user, this user occupies the physical resource of distributing to base station side alone in a transmission intercal, this transmission means is called single user's multiple-input, multiple-output (Single User Multiple-Input Multiple-Out-put is called for short SU-MIMO); Under multi-user's situation, the space resources of different antennae is distributed to different user, a user and at least one other user physical resource that the sharing base side is distributed in a transmission intercal, sharing mode can be space division multiple access mode or space division multiplexing mode, this transmission means is called multi-user's multiple-input, multiple-output (Multiple User Multiple-Input Multiple-Out-put, be called for short MU-MIMO), wherein the physical resource of base station side distribution is meant running time-frequency resource.Transmission system is if support SU-MIMO and MU-MIMO simultaneously, and eNB then needs to provide data under these two kinds of patterns to UE.UE need know that all eNB is for the used order (Rank) of these UE transmission MIMO data when SU-MIMO pattern or MU-MIMO pattern.Under the SU-MIMO pattern, the resource of all antennas is all distributed to same user, and the used number of plies of transmission MIMO data just equals eNB in the used order of transmission MIMO data; Under the MU-MIMO pattern, a corresponding user is transmitted total number of plies that the used number of plies is less than eNB transmission MIMO data, if carry out the switching of SU-MIMO pattern and MU-MIMO, eNB need be at the different transmission mode different control data of UE that sends a notice.
At long evolving system (Long Term Evolution, be called for short LTE) in, the up control signaling of transmission that needs has correct/error response message (Acknowledgement/Negative Acknowledgement, be called for short ACK/NACK), and information (the Channel State Information of reflection down physical channel state, abbreviation CSI) three kinds of forms: channel quality indication (Channels quality indication, CQI), pre-coding matrix indication (Pre-coding Matrix Indicator, PMI), the order indication (Rank Indicator, RI).
CQI is an index that is used for weighing the down channel quality quality.CQI represents with 0～15 integer value in the 36-213 agreement, has represented different CQI grades respectively, and different CQI correspondences separately code modulation mode, and (Modulation andCoding Scheme MCS), sees table 1 (4 bit CQI form) for details.
Table 1
Wherein, the QPSK in the above-mentioned table is Quadrature Phase Shift Keying (Quadrature Phase Shift Keying), and QAM is quadrature amplitude modulation (Quadrature Amplitude Modulation).
The selection of CQI grade should be followed following criterion:
Selected CQI grade should make the pairing PDSCH of this CQI (Physical Downlink Shared Channel, the Physical Downlink Shared Channel) Block Error Rate of transmission block under corresponding M CS be no more than 0.1.
Based on a unrestricted assay intervals in frequency domain and time domain, UE will obtain the highest CQI value, corresponding to each maximum CQI value that in sub-frame of uplink n, reports, the serial number range of CQI is 1-15, and satisfy following condition, if CQI sequence number 1 does not satisfy this condition, the CQI sequence number is 0: single PDSCH transmission block error rate when being received is no more than 0.1, the PDSCH transmission block comprises united information: modulation system and transmission block size, it is corresponding to a CQI sequence number and one group of downlink physical Resource Block taking, i.e. CSI reference resources.Wherein, this highest CQI value is meant, is guaranteeing that Packet Error Ratio (block error rate is called for short BLER) is not more than 0.1 o'clock maximum CQI value, helps controlling resource allocation.In general, the CQI value is more little, and the resource that takies is many more, and the BLER performance is good more.
Corresponding to a CQI sequence number have transmission block size and a modulation system united information, if:
1) according to the associated transport block size, these united informations of PDSCH transmission can be used signaling in the CSI reference resources, in addition:
2) modulation scheme characterize with the CQI sequence number and
3) be used in the united information that comprises transmission block size and modulation scheme in the reference resources, the efficient channel code rate that it produced is the approaching efficient channel code rate of most probable that can be characterized by the CQI sequence number.When there being this more than one united information, when they can produce the same approaching efficient channel code rate that is characterized by the CQI sequence number, then adopt united information with minimum transfer block size.
Each CQI sequence number correspondence a kind of modulation system and transmission block size, transmission block size and Physical Resource Block number (the number of Physical resource block, be called for short NPRB) a definite corresponding relation is arranged, according to the big I calculation code speed of transmission block size and NPRB.
LTE-A (Long-Term EvolutionAdvance, advanced long-term evolution system) introduces Relay (relaying) increases covering, improves the cell edge throughput.Relay mainly is divided into 3 classes: L1 Relay, L2 Relay and L3 Relay.L1 Relay is the repeater of an enhancing, realizes the amplification forwarding capability of physical layer; L2 Relay realizes the decoding forwarding capability, transmit PDCP (Packet Data Convergence Protocol, packet data convergence protocol) PDU (Packet Data Unit, Packet Data Unit), RLC (Radio Link Control, Radio Link control), PDU, MAC (MediaAccess Control, medium access control) PDU and transmission block, base station than wireless backhaul is simple, cheap, but than repeater complexity, from protocol function, layer 2 relay node (Relay Node, abbreviate RN as) certain resource allocation function is arranged, but do not have complete layer three resource management function; L3 Relay is the base station of a wireless backhaul, has comprised 3 complete layer protocols, transmits the IP bag.At present, Type1 Relay (layer three Relay) and Type2 relay (layer 2Relay) have been defined at 3GPP (3rd Generation Partnership Project, third generation partner program).Type 1 Relay has following characteristic: as the control sub-district, each Type 1Relay has independently sub-district ID; The sub-district ID of Type1 Relay is different with the sub-district ID of affiliated base station; Type1 Relay has scheduling of resource and HARQ (Hybrid Automatic Repeat Request mixes automatic repeat requests) function; For the R8 terminal, the performance of Type 1 Relay such as same base station; For the LTE-A terminal, Type 1 Relay may have the performance more advanced than R8 base station to be strengthened.At present, 3GPP has finished the backhaul return link design of Type I Relay.The design discussion of return link multiplex mode etc. of R-PDCCH relaying Physical Downlink Control Channel to the effect that wherein.For R-PDCCH, resource allocation can be distributed or centralized, and multiplex mode can support pure frequency division multiplexing can support that also time division multiplexing adds frequency division multiplexing.
The CQI definition that occurs among the LTE is various, according to different principles, CQI can be divided:
1, be divided into wideband CQI and subband CQI according to measuring bandwidth:
Wideband (broadband) CQI refers to the channel status indication to all subband (subband), and what obtain is the CQI information of subband S set;
Subband CQI pointer is to the CQI information of each subband.LTE is according to different system bandwidths, and the Resource Block (RB:Resource Block) of effective bandwidth correspondence has been divided into several RB groups, and each RB group is referred to as subband, i.e. subband.
Subband CQI can be divided into full subband CQI and Best (optimum) M CQI again: full subband CQI reports the CQI information of all subbands; Best M CQI selects M subband from sets of subbands S, report the CQI information of this M subband, and reports the positional information of M subband simultaneously.
2, be divided into single current CQI and double-current CQI according to the code stream number:
Single current CQI: be applied to single-antenna transmission port 0, the Closed-Loop Spatial Multiplexing of port 5, transmit diversity, MU-MIMO, RI=I, this moment, UE reported the CQI information of single code stream;
Double fluid CQI: be applied to the Closed-Loop Spatial Multiplexing pattern.For the Open-Loop Spatial Multiplexing pattern, because channel condition information the unknown, and in precoding, double-current characteristic has been carried out equilibrium treatment, so under the Open-Loop Spatial Multiplexing, the CQI of 2 code streams equates.
3, be divided into absolute value CQI and differential CQI according to the CQI method for expressing
The CQI index that absolute value CQI promptly represents with 4bit in the table 1;
Differemial (difference) CQI is a differential CQI, the CQI index that represents with 2bit or 3bit; Differential CQI is divided into the 2nd code stream again with respect to the differential CQI of the 1st code stream, the subband CQI differential CQI with respect to subband CQI.
4, report mode to be divided into wideband CQI, UE selected (selecting) (subband CQI), High layer configured (high-rise configuration) (subband CQI) according to CQI
Wideband CQI refers to the CQI information of subband S set;
UE selected (subband CQI) is Best M CQI, feeds back the CQI information of a selected M subband, reports the position of M subband simultaneously;
High layer configured (subband CQI) is full subband CQI, at CQI information of each subband feedback.
High layer configured and UE selected all are feedback systems of subband CQI, under the aperiodic feedback model, and not of uniform size the causing of subband of these two kinds of feedback systems definition; Under UE selected pattern, also defined the size of M.
In the LTE system, the capable physically control channel (PUCCH:Physical Uplink Control) of ACK/NACK response message is gone up and is transmitted with form 1/1a/1b (PUCCH format (form) 1/1a1/b), when if terminal UE need send upstream data, then capable physically shared channel (Physical Uplink Shared Channel, be called for short PUSCH) go up and transmit, the feedback of CQI/PMI and RI can be periodic feedback, also can be acyclic feedback, concrete feedback be shown in table 2 (periodic feedback and the corresponding uplink physical channel of aperiodicity feedback).
Table 2
| Scheduling method | Periodicity CQI reporting channel | Aperiodicity CQI reporting channel |
| Frequency is non-selective | PUCCH | |
| Frequency selectivity | PUCCH | PUSCH |
Wherein, for the CQI/PMI and RI of periodic feedback, if UE does not need to send upstream data, then the CQI/PMI of periodic feedback and RI transmit with form 2/2a/2b (PUCCH format2/2a/2b) on PUCCH, when if UE need send upstream data, then CQI/PMI and RI transmit on PUSCH; For the CQI/PMI and RI of aperiodicity feedback, only on PUSCH, transmit.
Following three kinds of downlink physical control channels have been defined in the version 8 of Long Term Evolution (Release 8) standard: physical down control format indicating channel (Physical Control Format Indicator Channel, abbreviate PCFICH as), the automatic repeat requests indicating channel of physical mixed (Physical Hybrid Automatic Retransmission Request Indicator Channel, abbreviate PHICH as) and Physical Downlink Control Channel (Physical Downlink Control Channel abbreviates PDCCH as).Wherein PDCCH is used for bearing downlink control information (Downlink Control Information abbreviates DCI as), comprising: uplink and downlink schedule information, and uplink power control information.The form of DCI (DCI format) is divided into following several: DCI format 0, DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format 1D, DCI format 2, DCI format 2A, DCI format 3 and DCI format 3A etc.; Wherein support the transmission mode 5 of MU-MIMO to utilize the Downlink Control Information of DCI format 1D, and the descending power territory among the DCI format 1D (Downlink power offset field) δ
Power-offsetBe used in reference to and be shown in that the power for a user reduces by half in the MU-MIMO pattern information of (promptly-10log10 (2)), because 5 of MU-MIMO transmission modes are supported two users' MU-MIMO transmission, by this descending power territory, MU-MIMO transmission mode 5 can be supported the dynamic switching of SU-MIMO pattern and MU-MIMO pattern, but no matter a UE is only supported the transmission of a stream at SU-MIMO pattern or this DCI format of MU-MIMO pattern, though LTERelease 8 supports single user's transmission of maximum two streams in transmission mode 4, but because the switching between the transmission mode can only be semi-static, so in LTE version 8, can not accomplish the dynamic switching of single user's multithread transmission and multi-user's transmission.
In the version 9 (Release 9) of LTE, defeated in order to strengthen descending multi-antenna transmitting, introduced the transmission mode that double-current wave beam forms (Beamforming), be defined as transmission mode 9, and Downlink Control Information has increased DCI format 2B to support this transmission mode, a scrambler sequence identity (scrambling identity is arranged in DCI format 2B, abbreviation SCID) sign bit is to support two different scrambler sequence, eNB can distribute to different user with these two scrambler sequence, a plurality of users of same resource multiplex.In addition, when having only a transmission block to enable, the antenna port the when new data of the transmission block correspondence of disable (Disabled) indication (NDI) bit also is used to refer to the individual layer transmission.
In addition, in the version 10 of LTE, in order further to strengthen the transmission of descending many antennas, increased the transmission mode of new Closed-Loop Spatial Multiplexing, be defined as transmission mode 10, this transmission mode both can be supported Single User MIMO, can support multi-user MU-MIMO again, and can support both dynamic switchings, this in addition transmission mode is also supported the transmission of 8 antennas.This new transmission mode has been determined to separate the pilot tone of calling with demodulation pilot frequency (Demodulation Reference Signal abbreviates DMRS as), and UE need determine the position of pilot tone, just can do the estimation of channel and interference on pilot tone.
In the R10 version, UE is set to based on following a kind of transmission mode (transmission mode) by high-level signaling semi-static (semi-statically), receives the PDSCH transfer of data according to the indication of the PDCCH of the search volume of subscriber equipment proprietary (UE-Specific):
Pattern 1: single antenna port; Port 0 (Single-antenna port; Port 0)
Pattern 2: transmit diversity (Transmit diversity)
Mode 3: Open-Loop Spatial Multiplexing (Open-loop spatial multiplexing)
Pattern 4: Closed-Loop Spatial Multiplexing (Closed-loop spatial multiplexing)
Pattern 5: multi-user's multiple-input and multiple-output (Multi-userMIMO)
Pattern 6: closed loop Rank=1 precoding (Closed-loop Rank=1 precoding)
Mode 7: single antenna port; Port 5 (Single-antenna port; Port 5)
Pattern 8: stream transmission, i.e. dual-stream beamforming
Pattern 9: maximum 8 layers Closed-Loop Spatial Multiplexing.
In the R10 version, increased transmission mode 9 and CSI-RS (Channel-State Information-Reference Symbol, channel condition information reference symbol) newly, transmission mode 9 is based on CSI-RS and carries out channel measurement, thereby calculates CQI.Other transmission modes are carried out channel measurement based on CRS (Common Reference signal, public reference signal), thereby calculate CQI.In the R10 version, also increased number of C SI-RS parameter accordingly and characterized its attribute.CRS among the contrast R8, some parameter is that similarly some parameter increases newly.As the CSI-RS port number similar CRS port number is arranged also in R8, CSI-RS sub-frame configuration cycle parameter then increases newly.Below parameter be that the sub-district is proprietary and disposed by high-level signaling, be used for the definition of CSI-RS, comprise: CSI-RS port number, CSI-RS configuration, CSI-RS sub-frame configuration parameter I CSI-RS, sub-frame configuration period T CSI-RS, subframe deviator and control UE are to the hypothesis of the reference PDSCH transmitting power that is used for the CSI feedback.
In R10,,, need two PMI of feedback because introduced the new ideas of " dicode originally " or " two PMI (Pre-coding Matrix Indicator is with the encoder matrix index) " for transmission mode 9; For 8 antennas, the channel condition information in PMI indication broadband, the channel condition information of the 2nd PMI indication subband has only two PMI of acquisition just can obtain complete pre-coding matrix information, and wherein subband comprises the situation in broadband; For 2 antennas and 4 antennas, what a PMI indicated is unit matrix, and the 2nd PMI is equivalent to the PMI of former R8 agreement.
New transmission mode 9 for the R10 agreement, CQI determines and calculating lacks consideration, promptly and reckon without the reference resources that R-PDCCH takies and how to handle, if there is the situation of the reference resources that R-PDCCH takies, can't accurately calculate the CQI value, thereby cause transmission mode 9 can't use CRS or CSI-RS to realize channel measurement exactly, just in the time of transmission mode 9, can't obtain channel quality information accurately, will seriously reduce the flexibility and the performance index of system.
Summary of the invention
Main purpose of the present invention is to provide a kind of acquisition methods and device of channel quality indication (CQI) information, channel quality indication (CQI) information accurately be can't not obtain to solve via node in the existing system because consider existing of R-PDCCH, the flexibility of system and the problem that performance reduces caused.
According to an aspect of the present invention, provide a kind of acquisition methods of channel quality indication (CQI) information, having comprised: via node receives the channel condition information CSI reference resources that the base station sends; Via node is measured the channel condition information reference symbol CSI-RS and/or the public reference signal CRS of CSI reference resources correspondence; The result that the via node basis measures determines the CQI value of CSI reference resources correspondence, and wherein, suppose relay Physical Downlink Control Channel R-PDCCH does not take the resource element in the CSI reference resources; Perhaps, the resource element of supposing not dispose in the CSI reference resources is given relaying Physical Downlink Control Channel R-PDCCH; Via node reports the base station with the CQI value.
The resource element that suppose relay Physical Downlink Control Channel R-PDCCH does not take the CSI reference resources refers to: if R-PDCCH takies resource element in the CSI reference resources, and the resource element that takies of R-PDCCH that then when determining the CQI value, data occupancy has been set.
The resource element of supposing not dispose in the CSI reference resources refers to for relaying Physical Downlink Control Channel R-PDCCH: if the resource element that has disposed in the CSI reference resources is given R-PDCCH, the resource element that does not dispose in the CSI reference resources then is set when determining the CQI value gives R-PDCCH.
Via node determines that according to the result who measures the step of the CQI value of CSI reference resources correspondence comprises: whether the transmission mode of judging via node is transmission mode 9, and, judge whether allocating pre-coding matrix indication PMI/ order is indicated RI in the base station, and, judge whether the CSI-RS port number equals 1; If the transmission mode of via node is not a transmission mode 9, perhaps, the base station do not dispose PMI/RI or, the CSI-RS port number equals 1, then via node comes the CQI value of specified data according to the measurement result that CRS is measured; If the transmission mode of via node is a transmission mode 9, and base station configuration has PMI/RI, and the CSI-RS port number is greater than 1, and then via node comes the CQI value of specified data according to the measurement result that CSI-RS is measured.
Via node receives before the channel condition information CSI reference resources of base station transmission, the acquisition methods of above-mentioned channel quality indication (CQI) information is further comprising the steps of: one group of downlink physical Resource Block is set as the CSI reference resources on frequency domain, wherein, the downlink physical Resource Block is corresponding on the CQI value frequency band corresponding; A descending sub frame is set as the CSI reference resources on time domain; And according to any RI and PMI definition CSI reference resources, wherein, the CQI value is a condition with RI and PMI on the transport layer territory.
Via node reports the CQI value after the base station, and the acquisition methods of above-mentioned channel quality indication (CQI) information also comprises: transmission block size and modulation system are determined according to the CQI value that receives in the base station.
According to a further aspect in the invention, provide a kind of deriving means of channel quality indication (CQI) information, having comprised: receiving element is used to receive the channel condition information CSI reference resources that the base station sends; Measuring unit is used for the channel condition information reference symbol CSI-RS and/or the public reference signal CRS of CSI reference resources correspondence are measured; Determining unit, be used for determining the CQI value of CSI reference resources correspondence according to the result who measures, wherein, suppose relay Physical Downlink Control Channel R-PDCCH does not take the resource element in the CSI reference resources, perhaps, the resource element of supposing not dispose in the CSI reference resources is given relaying Physical Downlink Control Channel R-PDCCH; Transmission unit is used for the CQI value is reported the base station.
The resource element that suppose relay Physical Downlink Control Channel R-PDCCH does not take the CSI reference resources refers to: if R-PDCCH takies resource element in the CSI reference resources, and the resource element that takies of R-PDCCH that then when determining the CQI value, data occupancy has been set; The resource element of supposing not dispose in the CSI reference resources refers to for relaying Physical Downlink Control Channel R-PDCCH: if the resource element that has disposed in the CSI reference resources is given R-PDCCH, the resource element that does not dispose in the CSI reference resources then is set when determining the CQI value gives R-PDCCH.
Determining unit comprises: judge module, be used to judge whether the transmission mode of via node is transmission mode 9, and, judge whether allocating pre-coding matrix indication PMI/ order is indicated RI in the base station, and, judge whether the CSI-RS port number equals 1; Determination module, the transmission mode that is used at via node is not a transmission mode 9, perhaps, the base station do not dispose PMI/RI or, the CSI-RS port number equals at 1 o'clock, comes the CQI value of specified data according to the measurement result that CRS is measured; Perhaps the transmission mode at via node is a transmission mode 9, and base station configuration has PMI/RI, and the CSI-RS port number came the CQI value of specified data greater than 1 o'clock according to the measurement result that CSI-RS is measured.
The deriving means of channel quality indication (CQI) information also comprises: the unit is set, is used for being provided with one group of downlink physical Resource Block as the CSI reference resources on frequency domain, wherein, the downlink physical Resource Block is corresponding on the CQI value frequency band corresponding; A descending sub frame is set as the CSI reference resources on time domain; And according to any RI and PMI definition CSI reference resources, wherein, the CQI value is a condition with RI and PMI on the transport layer territory.
By the present invention, do not increasing any system complexity and signaling consumption and do not influencing under the condition of system compatibility, suppose relay Physical Downlink Control Channel R-PDCCH does not take the resource element of CSI reference resources to carry out determining of CQI value, suppose that perhaps the resource element that the base station does not dispose in the CSI reference resources gives R-PDCCH to carry out the definite of CQI value, thereby determined to be applicable to the resource element number that CQI calculates that is used for of most situations, solved that via node can't not obtain channel quality indication (CQI) information accurately because considering the existence of R-PDCCH in the existing system, cause the flexibility of system and the problem that performance reduces, and then reached accurate acquisition channel quality indication (CQI) information, improve the effect of system flexibility and performance.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the preferred structure block diagram according to the deriving means of the channel quality indication (CQI) information of the embodiment of the invention;
Fig. 2 is the another kind of structured flowchart according to the deriving means of the channel quality indication (CQI) information of the embodiment of the invention;
Fig. 3 is the preferred flow charts according to the acquisition methods of the channel quality indication (CQI) information of the embodiment of the invention;
Fig. 4 is the another kind of flow chart according to the acquisition methods of the channel quality indication (CQI) information of the embodiment of the invention;
Fig. 5 is another structured flowchart according to the deriving means of the channel quality indication (CQI) information of the embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Embodiment 1
Fig. 1 is that this device comprises according to the preferred structure block diagram of the deriving means of the via node channel quality indication (CQI) information of the embodiment of the invention: the receiving element 102 of Lian Jieing, measuring unit 104, determining unit 106 and transmission unit 108 successively, wherein:
Receiving element 102 receives the channel condition information CSI reference resources that the base station sends;
The channel condition information reference symbol CSI-RS and/or the public reference signal CRS of 104 pairs of CSI reference resources of measuring unit correspondence measure;
The result that determining unit 106 bases measure determines the CQI value of CSI reference resources correspondence, and wherein, suppose relay Physical Downlink Control Channel R-PDCCH does not take the resource element in the CSI reference resources; Perhaps the resource element that do not dispose in the described CSI reference resources of hypothesis is given relaying Physical Downlink Control Channel R-PDCCH;
Transmission unit 108 reports the base station with the CQI value.
In this preferred embodiment, do not increasing any system complexity and signaling consumption and do not influencing under the condition of system compatibility, suppose relay Physical Downlink Control Channel R-PDCCH does not take the resource element of CSI reference resources to carry out determining of CQI value, suppose that perhaps the resource element that the base station does not dispose in the described CSI reference resources gives R-PDCCH to carry out the definite of CQI value, thereby determined to be applicable to the resource element number that CQI calculates that is used for of most situations, solved that via node can't not obtain channel quality indication (CQI) information accurately because considering the existence of R-PDCCH in the existing system, cause the flexibility of system and the problem that performance reduces, and then reached accurate acquisition channel quality indication (CQI) information, improve the effect of system flexibility and performance.
Based on preferred structure block diagram shown in Figure 1, Fig. 2 has shown the another kind of structured flowchart of the deriving means of channel quality indication (CQI) information, and this device also comprises, what connect receiving element 102 is provided with unit 110.
Wherein, the resource element that determining unit 106 suppose relay Physical Downlink Control Channel R-PDCCH do not take the CSI reference resources refers to: if R-PDCCH takies resource element in the CSI reference resources, and the resource element that takies of R-PDCCH that then when determining the CQI value, data occupancy has been set; The resource element of supposing not dispose in the described CSI reference resources refers to for relaying Physical Downlink Control Channel R-PDCCH: if the resource element that has disposed in the described CSI reference resources is given described R-PDCCH, the resource element that does not dispose in the described CSI reference resources then is set when determining the CQI value gives described R-PDCCH.In this preferred embodiment, the resource element of the CSI reference resources that R-PDCCH takies is set to the resource element of the CSI reference resources of data occupancy and determines the CQI value, perhaps the base station is set to the base station to the resource element of RN configuration CSI reference resources and does not determine the CQI value to the resource element of RN configuration CSI reference resources, has guaranteed the accuracy of calculating.
Based on Fig. 2, present embodiment provides a kind of preferred determining unit 106 structures, this determining unit 106 comprises: connection judgment module 1061 is cover half piece 1062 really, judge module 1061 connects measuring unit 104, wherein judge module 1061 judges whether the transmission mode of described via node is transmission mode 9, and, judge whether allocating pre-coding matrix indication PMI/ order is indicated RI in described base station, and, judge whether the CSI-RS port number equals 1; Determination module 1062 is not a transmission mode 9 in the transmission mode of described via node, perhaps, described base station do not dispose described PMI/RI or, described CSI-RS port number equals at 1 o'clock, determines the CQI value of described data according to the measurement result that described CRS is measured; Perhaps determination module 1062 is a transmission mode 9 in the transmission mode of described via node, and described base station configuration has described PMI/RI, and described CSI-RS port number was determined the CQI value of described data greater than 1 o'clock according to the measurement result that described CSI-RS is measured.In this preferred embodiment, CRS or CSI-RS measured to obtain CQI value distinguish, guarantee the correctness of calculating CQI value.
Preferably, unit 110 is set one group of downlink physical Resource Block is set as the CSI reference resources on frequency domain, wherein, the downlink physical Resource Block is corresponding on the CQI value frequency band corresponding; A descending sub frame is set as the CSI reference resources on time domain; Defining described CSI reference resources according to any RI and PMI on the transport layer territory, wherein, described CQI value is a condition with described RI and described PMI.In this preferred embodiment, the CSI reference resources is provided with, guaranteed under different situations, all can calculate accurately to CQI.
Preferably, after described via node reported described base station with described CQI value, transmission block size and modulation system were determined according to the CQI value that receives in described base station.
Embodiment 2
Fig. 3 is the preferred flow charts according to the acquisition methods of the channel quality indication (CQI) information of the embodiment of the invention, and this method comprises:
S302, via node receives the channel condition information CSI reference resources that the base station sends;
S304, via node is measured the channel condition information reference symbol CSI-RS and/or the public reference signal CRS of CSI reference resources correspondence;
S306, via node is determined the CQI value of CSI reference resources correspondence according to the result who measures, wherein, suppose relay Physical Downlink Control Channel R-PDCCH does not take the resource element in the CSI reference resources, perhaps, the resource element of supposing not dispose in the described CSI reference resources is given relaying Physical Downlink Control Channel R-PDCCH;
S308, via node reports the base station with the CQI value.
In this preferred embodiment, do not increasing any system complexity and signaling consumption and do not influencing under the condition of system compatibility, suppose relay Physical Downlink Control Channel R-PDCCH does not take the resource element of CSI reference resources to carry out determining of CQI value, suppose that perhaps the resource element that the base station does not dispose in the described CSI reference resources gives R-PDCCH to carry out the definite of CQI value, thereby determined to be applicable to the resource element number that CQI calculates that is used for of most situations, solved that via node can't not obtain channel quality indication (CQI) information accurately because considering the existence of R-PDCCH in the existing system, cause the flexibility of system and the problem that performance reduces, and then reached accurate acquisition channel quality indication (CQI) information, improve the effect of system flexibility and performance.
According to said method, the resource element that the suppose relay Physical Downlink Control Channel R-PDCCH of present embodiment does not take the CSI reference resources refers to: if R-PDCCH takies resource element in the CSI reference resources, and the resource element that takies of R-PDCCH that then when determining the CQI value, data occupancy has been set.
The resource element of supposing not dispose in the described CSI reference resources refers to for relaying Physical Downlink Control Channel R-PDCCH: if the resource element that has disposed in the described CSI reference resources is given described R-PDCCH, the resource element that does not dispose in the described CSI reference resources then is set when determining the CQI value gives described R-PDCCH.In this preferred embodiment, the resource element of the CSI reference resources that R-PDCCH takies is set to the resource element of the CSI reference resources of (perhaps equivalence is) data occupancy and determines the CQI value, perhaps the base station is set to the base station to the resource element of RN configuration CSI reference resources and does not determine the CQI value to the resource element of RN configuration CSI reference resources, has guaranteed definite accuracy.
Present embodiment also provides a kind of preferred via node to determine to take the step of the CQI value of the CSI reference resources in the CSI reference resources according to the result who measures, this step comprises: whether the transmission mode of judging described via node is transmission mode 9, and, judge whether allocating pre-coding matrix indication PMI/ order is indicated RI in described base station, and, judge whether the CSI-RS port number equals 1; If the transmission mode of described via node is not a transmission mode 9, perhaps, described base station do not dispose described PMI/RI or, described CSI-RS port number equals 1, then described via node comes the CQI value of specified data according to the measurement result that described CRS is measured; If the transmission mode of described via node is a transmission mode 9, and described base station configuration has described PMI/RI, and described CSI-RS port number is greater than 1, and then described via node comes the CQI value of specified data according to the measurement result that described CSI-RS is measured.In this preferred embodiment, CRS or CSI-RS measured to obtain CQI value distinguish, guarantee the correctness of calculating CQI value.
In this enforcement, via node receives before the channel condition information CSI reference resources of base station transmission, the acquisition methods of preferred channel quality indication information is further comprising the steps of one of at least: one group of downlink physical Resource Block is set as the CSI reference resources on frequency domain, wherein, the downlink physical Resource Block is corresponding on the CQI value frequency band corresponding; A descending sub frame is set as the CSI reference resources on time domain; Define described CSI reference resources according to any RI and PMI on the transport layer territory, wherein, described CQI value is a condition with described RI and described PMI.In this preferred embodiment, the CSI reference resources is provided with, guaranteed under different situations, all can calculate accurately to CQI.
In the present embodiment, after via node reported described base station with the CQI value, the acquisition methods of preferred channel quality indication information also comprised: transmission block size and modulation system are determined according to the CQI value that receives in the base station.In this preferred embodiment, further improve system flexibility and performance.
Embodiment 3
Fig. 4 is the another kind of flow chart according to the acquisition methods of the channel quality indication (CQI) information of the embodiment of the invention, and this method comprises:
S401, base station eNodeB transmission CSI-RS and CRS are to via node (Relay Node abbreviates RN as);
S403, via node carries out channel measurement according to CSI-RS or CRS;
S405, via node is determined the CSI reference resources, and determine CQI value on the CSI reference resources according to the channel measurement result, and, this CQI acquisition methods comprises, when determining the CQI value, suppose that R-PDCCH (Relay Physical Downlink Control Channel) relaying Physical Downlink Control Channel does not have the resource of the CSI reference resources of use; Perhaps, the resource element of supposing not dispose in the described CSI reference resources is given relaying Physical Downlink Control Channel R-PDCCH;
S407, via node reports eNodeB with the CQI value.
Wherein, on frequency domain, the CSI reference resources defines with one group of downlink physical Resource Block, and the downlink physical Resource Block is corresponding on the CQI value frequency band corresponding of source; On time domain, the CSI reference resources defines with a descending sub frame; On the transport layer territory, the CSI reference resources is by any RI and PMI definition on the transport layer territory, and CQI is a condition with described RI and PMI.That is to say that on frequency domain, the CSI reference resources is represented that CQI measures and got on certain section bandwidth; On time domain, the CSI reference resources is illustrated on certain descending sub frame to measure and gets, and wherein, descending sub frame is invalid in some cases.When the descending sub frame at CSI reference resources place is invalid, then do not report CQI in the sub-frame of uplink on subframe n; Concrete, during periodic feedback CQI, its descending sub frame nCQI_ref is for being at least 4.That is to say that CQI measures to get at least before 4 descending sub frames; Aperiodic, CQI measured to get on the descending sub frame that DCI format 0 triggers when feeding back; Aperiodic, CQI was that subframe measurement after the subframe that Random Access Response Grant triggers gets when feeding back; On domain transmission, CQI is calculated by PMI and RI and gets.
And in the CSI reference resources, via node should be done following hypothesis, calculates the CQI sequence number:
1) preceding 3 OFDM symbols are used for control signal;
2) there is not resource particle to be used for primary/secondary synchronizing signal or Physical Broadcast Channel (PBCH:Physical Broadcast Channel);
3) the CP length of non-Multicast Broadcast Single Frequency Network (MBSFN:Multicast/Broadcast Single Frequency Network) subframe;
4) redundancy versions 0;
5) (increase) ratio between PDSCH EPRE and the CSI-RS newly;
6) according to the current configuration transmission mode of via node (may be default mode), the transmission plan of PDSCH;
PDSCH EPRE does not consider ρ with respect to the ratio of the proprietary RS EPRE in sub-district
Aρ
AShould be following hypothesis:
7) if via node is configured to have the transmission mode 2 of 4 cell-specific antenna ports, or has the transmission mode 3 of 4 cell-specific antenna ports and related RI value is at 1 o'clock, for any modulation scheme, ρ
A=P
A+ Δ
Offset+ 10log
10(2) [dB]; Otherwise, for any modulation scheme and any number of plies, ρ
A=P
A+ Δ o
Ffset[dB].Wherein, PA represents the ratio (The ratio ofPDSCH EPRE to cell-specific RS EPRE) of each resource element energy of each the resource element energy of data and CRS, offset
OffsetParameter nomPDSCH-RSs-EPRE-Offset by the top signaling configuration is given.
In the present embodiment, owing to need carry out an adjustment, obtain adjusted adjusted value to real original ratio.Therefore, PA adjusts ratio before, ρ
A=P
A+ Δ
OffsetBe to adjust ratio afterwards.
When the transmission mode of described via node is not a transmission mode 9, perhaps eNodeB (base station) does not dispose PMI/RI, perhaps the CSI-RS port number equals at 1 o'clock, via node comes the CQI value of specified data based on the measurement result that CRS is measured, when the transmission mode of described via node is a transmission mode 9, and eNodeB disposes PMI/RI and CSI-RS port number greater than 1 o'clock, and via node comes the CQI value of specified data based on the measurement result that CSI-RS is measured.
Owing to do not increase any system complexity and signaling consumption, high-level signaling by configuration determines whether current feedback model has the feedback of PMI/RI, support the PMI/RI feedback and do not had two kinds of forms of PMI/RI feedback, thereby remedied the deficiencies in the prior art.On the other hand, owing to used the parameter of CSI-RS among the R10 effectively, kept favorable compatibility.
Based on said method, present embodiment provides four kinds of examples, and the present invention is described further.
Example 1:
Suppose that the base station disposed transmission mode 9 for certain RN, the base station has disposed 8 CSI-RS ports for this RN, and the CSI-RS port numbers is from 15 to 22, and base station configuration the PMI/RI feedback arranged.From the angle that realizes, the base station up-downgoing is generally carried out work according to FDD (Frequency Division Duplexing, Frequency Division Duplexing (FDD)) mode.
Under above-mentioned assumed condition, calculate the CQI value as follows:
Base station eNodeB sends CSI-RS to via node (Relay Node);
Via node (Relay Node) carries out channel measurement according to CSI-RS;
Via node (Relay Node) is determined the CSI reference resources, and via node is determined CQI value on the CSI reference resources according to the channel measurement result.
Wherein, determine that the CQI value need suppose that R-PDCCH (Relay Physical Downlink Control Channel) relaying Physical Downlink Control Channel does not have the resource element of the CSI reference resources that uses.At this moment, the resource element that has R-PDCCH to use in the CSI reference resources need suppose that the resource element that these R-PDCCH use is not taken by R-PDCCH this moment when calculating CQI, but by data occupancy.
Example 2:
Suppose that the base station has disposed transmission mode 9 to certain RN, and base station configuration RN there is not the PMI/RI feedback.From the angle that realizes, the base station up-downgoing is generally carried out work according to the TDD mode.
Under above-mentioned assumed condition, calculate the CQI value as follows:
Base station eNodeB sends CRS to via node (Relay Node);
Via node (Relay Node) carries out channel measurement according to CRS;
Via node (Relay Node) is determined the CSI reference resources, and terminal is determined CQI value on the CSI reference resources according to the channel measurement result.
Wherein definite CQI value need suppose that R-PDCCH (Relay Physical Downlink Control Channel) relaying Physical Downlink Control Channel does not have the resource element of the CSI reference resources of use.At this moment, the resource that has R-PDCCH to use in the CSI reference resources need suppose that the resource element that these R-PDCCH use is not taken by R-PDCCH this moment when calculating CQI, but by data occupancy.
Example 3
Suppose that the base station disposed transmission mode 9 for certain RN, the base station has disposed 8 CSI-RS ports for this RN, and the CSI-RS port numbers is from 15 to 22, and base station configuration the PMI/RI feedback arranged.From the angle that realizes, the base station up-downgoing is generally carried out work according to FDD (Frequency Division Duplexing, Frequency Division Duplexing (FDD)) mode.
Under above-mentioned assumed condition, calculate the CQI value as follows:
Base station eNodeB sends CSI-RS to via node (Relay Node);
Via node (Relay Node) carries out channel measurement according to CSI-RS;
Via node (Relay Node) is determined the CSI reference resources, and via node is determined CQI value on the CSI reference resources according to described CSI-RS channel measurement result.
Wherein, determine that the resource element that the CQI value need be supposed not dispose in the described CSI reference resources gives relaying Physical Downlink Control Channel R-PDCCH.At this moment, if base station configuration the resource element in the described CSI reference resources give described R-PDCCH, then the base station is provided with the resource element that do not dispose in the described CSI reference resources to described R-PDCCH when determining CQI value.
Example 4
Suppose that the base station has disposed transmission mode 9 to certain RN, and base station configuration RN there is not the PMI/RI feedback.From the angle that realizes, the base station up-downgoing is generally carried out work according to the TDD mode.
Under above-mentioned assumed condition, calculate the CQI value as follows:
Base station eNodeB sends CRS to via node (Relay Node);
Via node (Relay Node) carries out channel measurement according to CRS;
Via node (Relay Node) is determined the CSI reference resources, and terminal is determined CQI value on the CSI reference resources according to the channel measurement result of described CRS.
Wherein, determine that the resource element that the CQI value need be supposed not dispose in the described CSI reference resources gives relaying Physical Downlink Control Channel R-PDCCH.At this moment, if base station configuration the resource element in the described CSI reference resources give described R-PDCCH, then the base station is provided with the resource element that do not dispose in the described CSI reference resources to described R-PDCCH when determining CQI value.
Example 5
Suppose that the base station has disposed transmission mode 9 to certain RN, the base station has disposed 8 CSI-RS ports for this RN, and the CSI-RS port numbers is from 15 to 22, and up-downgoing is carried out according to the FDD mode.
Under above-mentioned assumed condition, calculate the CQI value as follows:
Base station eNodeB sends CSI-RS to via node (Relay Node);
Via node (Relay Node) carries out channel measurement according to CSI-RS;
Via node (Relay Node) is determined the CSI reference resources, and via node is determined CQI value on the CSI reference resources according to the channel measurement result.And, the resource element that does not have R-PDCCH to occupy in the CSI reference resources.
Wherein, determine that the CQI value need suppose that R-PDCCH (Relay Physical Downlink Control Channel) relaying Physical Downlink Control Channel does not have the resource element of the CSI reference resources that uses.At this moment, if just there is not the condition of described hypothesis in the resource element that does not have R-PDCCH to occupy in the CSI reference resources naturally.
Example 6:
Suppose that the base station has disposed transmission mode 9 to certain RN, the base station has disposed for this RN does not have the PMI/RI feedback, and up-downgoing is carried out according to the TDD mode.
Under above-mentioned assumed condition, calculate the CQI value as follows:
Base station eNodeB sends CRS to via node (Relay Node);
Via node (Relay Node) carries out channel measurement according to CRS;
Via node (Relay Node) is determined the CSI reference resources, and terminal is determined CQI value on the CSI reference resources according to the channel measurement result.And, the resource element that does not have R-PDCCH to occupy in the CSI reference resources.
Wherein, determine that the CQI value need suppose that R-PDCCH (Relay Physical Downlink Control Channel) relaying Physical Downlink Control Channel does not have the resource of the CSI reference resources that uses.At this moment, if just there is not described assumed condition naturally in the resource element that does not have R-PDCCH to occupy in the CSI reference resources.
In a word, the computational methods of CQI take into full account R-PDCCH to the influence that CQI calculates here, have guaranteed the accuracy of the CQI of demodulating data.Particularly, CQI calculates and is based on the simplest scene, promptly gets rid of the influence that reports CQI of R-PDCCH as far as possible, and whether the base station can have R-PDCCH according to current subframe in scheduling, MCS to data carries out suitable adjustment, guarantees adaptive performance of system link and effect.
Embodiment 4
Fig. 5 is another structured flowchart according to the deriving means of the channel quality indication (CQI) information of the embodiment of the invention, this device comprises: base station eNodeB 502 of Lian Jieing and via node 504 successively, wherein via node 504 comprises means for channel measurement 5041 and the CQI calculation element 5042 that connects base station eNodeB 502, and the CQI resource of connection CQI calculation element 5042 is determined device 5043.Wherein, means for channel measurement 5041 is used to carry out channel measurement; The CQI resource determines that device 5043 is used to carry out determining of CSI reference resources; CQI calculation element 5042 is used for the difference according to the result of channel measurement and CSI reference resources, the CQI value of calculated data.
In this preferred embodiment, base station eNodeB 502 and via node 504 can be carried out the acquisition methods of the channel quality indication (CQI) information of above-mentioned each embodiment, do not repeat them here.
From above description, as can be seen, the present invention has realized following technique effect: do not increasing any system complexity and signaling consumption and do not influencing under the condition of system compatibility, the resource element that adopts suppose relay Physical Downlink Control Channel R-PDCCH not take the CSI reference resources is determined the CQI value, determined to be applicable to the resource element number that CQI calculates that is used for of most situations, solved that via node can't not obtain channel quality indication (CQI) information accurately because considering the existence of R-PDCCH in the existing system, cause the flexibility of system and the problem that performance reduces, and then reached accurate acquisition channel quality indication (CQI) information, improve the effect of system flexibility and performance.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the acquisition methods of a channel quality indication (CQI) information is characterized in that, comprising:
Via node receives the channel condition information CSI reference resources that the base station sends;
Described via node is measured the channel condition information reference symbol CSI-RS and/or the public reference signal CRS of described CSI reference resources correspondence;
Described via node is determined the CQI value of described CSI reference resources correspondence according to the described result who measures, and wherein, suppose relay Physical Downlink Control Channel R-PDCCH does not take the resource element in the described CSI reference resources; Perhaps, the resource element of supposing not dispose in the described CSI reference resources is given relaying Physical Downlink Control Channel R-PDCCH;
Described via node reports described base station with described CQI value.
2. method according to claim 1, it is characterized in that, the resource element that suppose relay Physical Downlink Control Channel R-PDCCH does not take described CSI reference resources refers to: if described R-PDCCH takies resource element in the described CSI reference resources, and the resource element that takies of described R-PDCCH that then when determining the CQI value, data occupancy has been set.
3. method according to claim 1, it is characterized in that, the resource element of supposing not dispose in the described CSI reference resources refers to for relaying Physical Downlink Control Channel R-PDCCH: if the resource element that has disposed in the described CSI reference resources is given described R-PDCCH, the resource element that does not dispose in the described CSI reference resources then is set when determining the CQI value gives described R-PDCCH.
4. according to each described method in the claim 1 to 3, it is characterized in that described via node determines that according to the described result who measures the step of the CQI value of described CSI reference resources correspondence comprises:
Whether the transmission mode of judging described via node is transmission mode 9, and, judge whether allocating pre-coding matrix indication PMI/ order is indicated RI in described base station, and, judge whether the CSI-RS port number equals 1;
If the transmission mode of described via node is not a transmission mode 9, perhaps, described base station do not dispose described PMI/RI or, described CSI-RS port number equals 1, then described via node comes the CQI value of specified data according to the measurement result that described CRS is measured;
If the transmission mode of described via node is a transmission mode 9, and described base station configuration has described PMI/RI, and described CSI-RS port number is greater than 1, and then described via node comes the CQI value of specified data according to the measurement result that described CSI-RS is measured.
5. according to each described method in the claim 1 to 3, it is characterized in that via node receives before the channel condition information CSI reference resources of base station transmission, and is further comprising the steps of:
One group of downlink physical Resource Block is set as described CSI reference resources on frequency domain, wherein, described downlink physical Resource Block is corresponding on the described CQI value frequency band corresponding;
A descending sub frame is set as described CSI reference resources on time domain; And
Define described CSI reference resources according to any RI and PMI on the transport layer territory, wherein, described CQI value is a condition with described RI and described PMI.
6. method according to claim 1 is characterized in that, described via node reports described CQI value after the described base station, also comprises:
Transmission block size and modulation system are determined according to the CQI value that receives in described base station.
7. the deriving means of a channel quality indication (CQI) information is characterized in that, comprising:
Receiving element is used to receive the channel condition information CSI reference resources that the base station sends;
Measuring unit is used for the channel condition information reference symbol CSI-RS and/or the public reference signal CRS of described CSI reference resources correspondence are measured;
Determining unit, be used for determining the CQI value of described CSI reference resources correspondence according to the described result who measures, wherein, suppose relay Physical Downlink Control Channel R-PDCCH does not take the resource element in the described CSI reference resources, perhaps, the resource element of supposing not dispose in the described CSI reference resources is given relaying Physical Downlink Control Channel R-PDCCH; Transmission unit is used for described CQI value is reported described base station.
8. device according to claim 7 is characterized in that,
The resource element that suppose relay Physical Downlink Control Channel R-PDCCH does not take described CSI reference resources refers to: if described R-PDCCH takies resource element in the described CSI reference resources, and the resource element that takies of described R-PDCCH that then when determining the CQI value, data occupancy has been set;
The resource element of supposing not dispose in the described CSI reference resources refers to for relaying Physical Downlink Control Channel R-PDCCH: if the resource element that has disposed in the described CSI reference resources is given described R-PDCCH, the resource element that does not dispose in the described CSI reference resources then is set when determining the CQI value gives described R-PDCCH.
9. according to claim 7 or 8 described devices, it is characterized in that described determining unit comprises:
Judge module is used to judge whether the transmission mode of described via node is transmission mode 9, and, judge whether allocating pre-coding matrix indication PMI/ order is indicated RI in described base station, and, judge whether the CSI-RS port number equals 1;
Determination module, the transmission mode that is used at described via node is not a transmission mode 9, perhaps, described base station do not dispose described PMI/RI or, described CSI-RS port number equals at 1 o'clock, determines the CQI value of described data according to the measurement result that described CRS is measured; Perhaps the transmission mode at described via node is a transmission mode 9, and described base station configuration has described PMI/RI, and described CSI-RS port number was determined the CQI value of described data greater than 1 o'clock according to the measurement result that described CSI-RS is measured.
10. according to claim 7 or 8 described devices, it is characterized in that, also comprise the unit is set, be used on frequency domain, being provided with one group of downlink physical Resource Block as described CSI reference resources, wherein, described downlink physical Resource Block is corresponding on the described CQI value frequency band corresponding; A descending sub frame is set as described CSI reference resources on time domain; And define described CSI reference resources according to any RI and PMI on the transport layer territory, wherein, CQI is a condition with described RI and described PMI.
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