CN102377469A - Information feedback method, system and terminal of multipoint channel - Google Patents
Information feedback method, system and terminal of multipoint channel Download PDFInfo
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- CN102377469A CN102377469A CN2011102962642A CN201110296264A CN102377469A CN 102377469 A CN102377469 A CN 102377469A CN 2011102962642 A CN2011102962642 A CN 2011102962642A CN 201110296264 A CN201110296264 A CN 201110296264A CN 102377469 A CN102377469 A CN 102377469A
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Abstract
The invention discloses an information feedback method of a multipoint channel, which comprises the following steps: a network side is used for appointing N sets of channel state information (CSI) needing to be fed back for period CSI feedback and/or aperiodic CSI feedback of a terminal and configuring corresponding a channel state information-reference signal (CSI-RS) for the CSI for CSI measurement; the terminal selects M sets of the CSI from the N sets of the CSI to feed back and notifies the selected CSI information to the network side; or the network side selects M' sets of the CSI from the N sets of the CSI and indicates the terminal to carry out the feedback for the M' sets of the CSI, wherein N is a natural number larger than 1, and M and M' are natural numbers which are lager than 0 but not larger than 1. The invention also correspondingly discloses an information feedback system and terminal of the multipoint channel. According to the invention, the feedback quantity is reduced, the instantaneity of the CSI is ensured, and the system performance is improved.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of multidrop channel information feedback method, system and terminal.
Background technology
Along with the proposition of LTE-A demand, people more and more pay attention to node average spectral efficiency (ase) and node edge spectrum efficiency, comparatively speaking; The spectrum efficiency of node edge is paid close attention to by people most; This mainly is because the provisional capital up and down of LTE-A system is that (Orthogonal Frequency Division Multiplexing OFDM), perhaps is deformed into the frequency division systems of basic multiple access multiplexing mode with certain of OFDM with OFDM; With traditional with code division multiple access (Code Division Multiple Access; CDMA) be the wireless communication system difference of basic multiple access multiplexing mode, the LTE-A system does not have processing gain, and intra-node is because complete frequency division quadrature; So almost do not have interference problem, but handle thorny relatively in the interference at node edge place.
At present, the processing of among the LTE node edge place being disturbed mainly contains following three kinds of methods:
1, interference randomization;
2, interference eliminated;
3, interference coordination (hiding).
Wherein, The method of interference randomization generally adopts frequency hopping, when jumping, straight expand or the method for frame hopping alleviates the influence of interference between node, this method advantage is to need not the network planning, needs the support of signaling hardly; But this method can only alleviate interference, can not fundamentally eliminate interference; Though the method for interference eliminated can be used some algorithm to eliminate and disturb, generally need extra physical entity could accomplish interference eliminated preferably; The method of interference coordination (hiding) is through some information between switching node; Use some algorithm to make each node select adequate resources to transmit according to the feedback information and the situation of self of other nodes automatically; Thereby the efficient utilization of resource between the realization node; Alleviate the chance that the resource collision utilizes between node as far as possible, finally reach the lifting of node edge performance, avoid causing interference as far as possible because of the identical running time-frequency resource of contention between node.Because the antenna distance of a plurality of adjacent nodes of node edge user distance is more or less the same, therefore, can utilize the transmitting antenna of a plurality of nodes to realize the higher capacity and the reliable transmission of node edge place Radio Link.
Existing multipoint cooperative (Coordinated Multiple Points transmission and reception; CoMP) handling process of transmission is: the set of network side allocating and measuring; Concrete set indication can be sub-district ID set; Also can be the set of the corresponding many cover CSI-RS (Channel Stat Information Reference Resource) of a plurality of transmission nodes, the terminal according to measuring assembly carry out Reference Signal Received Power (Reference Signal Received Power, RSRP) or Reference Signal Received Quality (Reference Signal Received Quality; RSRQ) or receive signal strength signal intensity indication (Received Signal Strength Indicator; RSSI) measure, afterwards, based on this measurement result; Confirm the multipoint cooperative measuring assembly by network side or terminal, and carry out the measurement and the feedback of channel status based on the multipoint cooperative measuring assembly of confirming.
On feedback problem, prior art is carried out the channel condition information feedback independently to every node, and points out and can strengthen based on this mode.Third generation partner program (3rd Generation Partnership Project, 3GPP) Long Term Evolution (Long Term Evolution, LTE) in, channel condition information generally comprises but is not limited to following several kinds:
The characteristic vector information of channel is called precoding information again.Owing to use this precoding information of code book feedback, also often be called pre-coding matrix indication (Precoding Matrix Indicator, PMI) information;
Channel quality information (Channel Quality Information; CQI), characterize quality of channel information, characterize channel quality with the modulation coding mode of recommending; The modulation coding mode of high-order representes that performance is good more more, supports 16 kinds of CQI grades to select among the LTE altogether;
(Rank Indication RI), representes the number of plies of the spatial reuse that channel can be supported to the order information of channel, is called as the information of layer sometimes.RI is a positive integer, and generally speaking the value of RI is no more than the number Nt of transmitting antenna.
There are a lot of feedback models among the LTE, different feedback models is arranged under the different transmission modes, under the transmission mode of Closed-Loop Spatial Multiplexing; The feedback system of PMI/RI/CQI comprises to be fed back periodic feedback and aperiodic; Wherein, periodic feedback mainly be carried on Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH) on; Be a kind of the most frequently used feedback, periodic feedback is to dispose; Aperiodic, feedback was carried on Physical Uplink Shared Channel (Physical Uplink Shared Channel; PUSCH) on, aperiodic, feedback was the feedback of irregular flip-over type, belonged to auxiliary feedback system; Be the feedback that is used to improve precision, its expense is generally bigger.
Based on prior art, single-point CSI feedback only needs a CSI of feedback, and for multiple spot CSI feedback, needs many parts of CSI of feedback, and PUCCH goes up the transmission technology of feedback CSI and do not strengthen, and therefore causes feedback quantity very big, and is concrete:
The CSI of single-point is as shown in Figure 1 with the situation that pattern 2-1 feeds back on PUCCH, and wherein, WB PMI representes the precoding indication in broadband, and WB is the wideband abbreviation; WB CQI representes the CQI in broadband; SB CQI representes to carry CQI, and SB is the abbreviation of subband.Need to prove that pattern 2-1 also has a kind of situation, is the situation of RI and PTI (Preoder Type Indicator) combined coding, is applicable to 8 antennas.
The CSI of single-point is as shown in Figure 2 with the situation that pattern 1-1 feeds back on PUCCH; The situation and the pattern 2-1 of pattern 1-1 feedback are similar; Just do not have SB CQI feedback, need to prove that pattern 1-1 also has a kind of situation; Being applicable to 8 antennas, is the situation of the first index i1 combined coding of RI and 8 antenna codebooks.
A kind of situation of carrying out 2 CSI feedback based on prior art is as shown in Figure 3, and expense is bigger, more the CSI of multiple spot feedback and 2 CSI feedback sort seemingly, expense can increase more.
Can see,, can cause the cycle to double, can influence the real-time of CSI like this, influence the performance of descending MIMO and COMP because the CSI of each node is the time-division feedback now.For example, when a plurality of carrier aggregation (CA), each carrier component (CC) also is the time-division, estimates with 5 carrier waves and 3 nodes, and the last feedback quantity of PUCCH can increase 15 times.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of multidrop channel information feedback method, system and terminal, can reduce feedback quantity, guarantees the real-time of CSI, improves systematic function.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of multidrop channel information feedback method comprises:
Network side be the terminal cycle CSI feedback and/or aperiodic the CSI feedback specify N cover to need the channel condition information CSI of feedback, and be used for the channel condition information measurement for said CSI disposes corresponding channel state information reference signals CSI-RS;
The terminal selects the M cover CSI among the said N cover CSI to feed back; And with the selection information notification network side of CSI, perhaps, network side is selected M ' the cover CSI among the N cover CSI; And indicating terminal feeds back said M ' cover CSI; Wherein, N is the natural number greater than 1, and M, M ' are for greater than zero and be not more than the natural number of N.
The value of said M is predesignated or is disposed through signaling by network side.
The value of said M or M ' is 1 or 2.
When said M or M ' are q; Said terminal with the selection information notification network side of CSI is: the terminal uses
information or
individual mode bit to indicate the CSI of selection, and q is for greater than zero and be not more than the natural number of N.
Said terminal with the selection information notification network side of CSI is: the selection information notification network side of the signaling of the indication CSI selection in the upstream physical layer channel with CSI passed through at said terminal.
The signaling that said terminal is selected through indication CSI with the selection information notification network side of CSI is:
Signaling and order information RI that said indication CSI selects carry out combined coding, perhaps,
Signaling and 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, PTI that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding.
A kind of multidrop channel information feedback system comprises network side and terminal, wherein,
Said network side is used to the cycle CSI feedback at terminal and/or the CSI that aperiodic, the CSI feedback specified the N cover to feed back, and measures for said CSI configuration corresponding C SI-RS is used for channel condition information;
Said terminal is used for selecting the M cover CSI of said N cover CSI to feed back, and with the selection information notification network side of CSI, wherein, N be the natural number greater than 1, and M is for greater than zero and be not more than the natural number of N.
The value of said M is predesignated or is disposed through signaling by network side.
When said M was q, said terminal with the selection information notification network side of CSI was: the terminal uses
information or
individual mode bit to indicate the CSI of selection.
Said terminal with the selection information notification network side of CSI is: the selection information notification network side of the signaling of the indication CSI selection in the upstream physical layer channel with CSI passed through at said terminal.
The signaling that said terminal is selected through indication CSI with the selection information notification network side of CSI is:
Signaling and order information RI that said indication CSI selects carry out combined coding, perhaps,
Signaling and 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, PTI that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding.
A kind of multidrop channel information feedback system comprises network side and terminal, wherein,
Said network side is used to the cycle CSI feedback at terminal and/or the CSI that aperiodic, the CSI feedback specified the N cover to feed back, and measures for said CSI configuration corresponding C SI-RS is used for channel condition information; And select M ' the cover CSI among the N cover CSI, indicating terminal feeds back said M ' cover CSI;
Said terminal is used for according to the indication of network side said M ' cover CSI being fed back, and wherein, N be the natural number greater than 1, and M ' is for greater than zero and be not more than the natural number of N.
A kind of multidrop channel feedback information terminal comprises: selected cell, feedback unit and notification unit; Wherein,
Said selected cell; Being used at network side is the cycle CSI feedback at terminal and/or the channel condition information CSI that aperiodic, the CSI feedback specified N cover needs to feed back; And, said CSI is used for selecting the M cover CSI among the N cover CSI, wherein under the scene that channel condition information measures for disposing corresponding channel state information reference signals CSI-RS; N is the natural number greater than 1, and M is for greater than zero and be not more than the natural number of N;
Said feedback unit, the M cover CSI that is used for said selected cell is selected feeds back;
Said notification unit is used for the selection information notification network side with said CSI.
When said M was q, said terminal with the selection information notification network side of CSI was: the terminal uses
information or
individual mode bit to indicate the CSI of selection.
Said notification unit with the selection information notification network side of CSI is: the selection information notification network side of the signaling of the indication CSI selection in the upstream physical layer channel with CSI passed through at said terminal.
Said notification unit selects signaling with the selection information notification network side of CSI to be through indication CSI:
Signaling and order information RI that said indication CSI selects carry out combined coding, perhaps,
Signaling and 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, PTI that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding.
A kind of multidrop channel feedback information terminal; Be used for M ' cover CSI being fed back according to the indication of network side; Wherein, Network side be the terminal cycle CSI feedback and/or aperiodic the CSI feedback specify N cover to need the CSI of feedback, N be the natural number greater than 1, M ' is greater than zero and be not more than the natural number of N.
Multidrop channel information feedback method of the present invention, system and terminal; Network side be the terminal cycle CSI feedback and/or aperiodic the CSI feedback specify N cover to need the channel condition information CSI of feedback, and be used for the channel condition information measurement for said CSI disposes corresponding channel state information reference signals CSI-RS; The terminal selects the M cover CSI among the said N cover CSI to feed back; And with the selection information notification network side of CSI, perhaps, network side is selected M ' the cover CSI among the N cover CSI; And indicating terminal feeds back said M ' cover CSI; Wherein, N is the natural number greater than 1, and M, M ' are for greater than zero and be not more than the natural number of N.Through the present invention, reduced feedback quantity, guaranteed the real-time of CSI, improved systematic function.
Description of drawings
Fig. 1 is in the prior art, the situation sketch map that the CSI of single-point feeds back with pattern 2-1 on PUCCH;
Fig. 2 is in the prior art, the situation sketch map that the CSI of single-point feeds back with pattern 1-1 on PUCCH;
Fig. 3 is for carrying out a kind of situation sketch map of 2 CSI feedbacks based on prior art;
Fig. 4 is a multidrop channel information feedback method schematic flow sheet of the present invention.
Embodiment
Basic thought of the present invention is: network side be the terminal cycle CSI feedback and/or aperiodic the CSI feedback specify N cover to need the channel condition information CSI of feedback, and be used for the channel condition information measurement for said CSI disposes corresponding channel state information reference signals CSI-RS; The terminal selects the M cover CSI among the said N cover CSI to feed back; And with the selection information notification network side of CSI, perhaps, network side is selected M ' the cover CSI among the N cover CSI; And indicating terminal feeds back said M ' cover CSI; Wherein, N is the natural number greater than 1, and M, M ' are for greater than zero and be not more than the natural number of N.。
Fig. 4 is a multidrop channel information feedback method schematic flow sheet of the present invention, and is as shown in Figure 1, and this method comprises:
Step 401: network side be the terminal cycle CSI feedback and/or aperiodic the CSI feedback specify N cover to need the CSI of feedback, and be used for the channel condition information measurement for said CSI disposes corresponding channel state information reference signals (CSI-RS).
Step 402: the terminal selects the M cover CSI among the said N cover CSI to feed back; And with the selection information notification network side of CSI, perhaps, network side is selected M ' the cover CSI among the N cover CSI; And indicating terminal feeds back said M ' cover CSI; Wherein, N is the natural number greater than 1, and M, M ' are for greater than zero and be not more than the natural number of N.
Need to prove that the value of said M is predesignated or disposed through signaling by network side.
Need to prove; After network side is selected M ' the cover CSI among the N cover CSI; Indicating terminal carries out feedack to said M ' cover CSI can transmitted at down physical layer control channel; And being placed in the reporting format with the indication signaling that triggers feedback aperiodic, further can be the mode of bitmap.
When M or M ' are q; UE can use
information or
individual mode bit to indicate the CSI of selection, and q is for greater than zero and be not more than the natural number of N.
Preferably; The value of M or M ' is 1 or 2; N is under 3 the scene; When M is 1; UE can use
information or N mode bit to indicate the CSI of selection; When M was 2, UE can use
information or N mode bit to indicate the CSI of selection.
For step 402, the selection information notification network side of the signaling of the indication CSI selection in the upstream physical layer channel with CSI can be passed through in the terminal.
Here, the signaling selected through indication CSI of said terminal with the selection information notification network side of CSI can for:
Signaling and order information RI that said indication CSI selects carry out combined coding, perhaps,
Signaling and 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, PTI that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding.
The present invention has also correspondingly proposed a kind of multidrop channel information feedback system, and this system comprises: network side and terminal, wherein,
Said network side is used to the cycle CSI feedback at terminal and/or the CSI that aperiodic, the CSI feedback specified the N cover to feed back, and measures for said CSI configuration corresponding C SI-RS is used for channel condition information;
Said terminal is used for selecting the M cover CSI of said N cover CSI to feed back, and with the selection information notification network side of CSI, wherein, N be the natural number greater than 1, and M is for greater than zero and be not more than the natural number of N.
The value of said M is predesignated or is disposed through signaling by network side.
When said M was q, said terminal with the selection information notification network side of CSI was: the terminal uses
information or
individual mode bit to indicate the CSI of selection.
Said terminal with the selection information notification network side of CSI is: the selection information notification network side of the signaling of the indication CSI selection in the upstream physical layer channel with CSI passed through at said terminal.
The signaling that said terminal is selected through indication CSI with the selection information notification network side of CSI is:
Signaling and order information RI that said indication CSI selects carry out combined coding, perhaps,
Signaling and 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, PTI that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding.
The present invention has also correspondingly proposed a kind of multidrop channel information feedback system, and this system comprises network side and terminal, wherein,
Said network side is used to the cycle CSI feedback at terminal and/or the CSI that aperiodic, the CSI feedback specified the N cover to feed back, and measures for said CSI configuration corresponding C SI-RS is used for channel condition information; And select M ' the cover CSI among the N cover CSI, indicating terminal feeds back said M ' cover CSI;
Said terminal is used for according to the indication of network side said M ' cover CSI being fed back, and wherein, N be the natural number greater than 1, and M ' is for greater than zero and be not more than the natural number of N.
The present invention has also correspondingly proposed a kind of multidrop channel feedback information terminal, and this multidrop channel feedback information terminal comprises: selected cell, feedback unit and notification unit; Wherein,
Said selected cell; Being used at network side is the cycle CSI feedback at terminal and/or the channel condition information CSI that aperiodic, the CSI feedback specified N cover needs to feed back; And, said CSI is used for selecting the M cover CSI among the N cover CSI, wherein under the scene that channel condition information measures for disposing corresponding channel state information reference signals CSI-RS; N is the natural number greater than 1, and M is for greater than zero and be not more than the natural number of N;
Said feedback unit, the M cover CSI that is used for said selected cell is selected feeds back;
Said notification unit is used for the selection information notification network side with said CSI.
When said M was q, said terminal with the selection information notification network side of CSI was: the terminal uses
information or
individual mode bit to indicate the CSI of selection.
Said notification unit with the selection information notification network side of CSI is: the selection information notification network side of the signaling of the indication CSI selection in the upstream physical layer channel with CSI passed through at said terminal.
Said notification unit selects signaling with the selection information notification network side of CSI to be through indication CSI:
Signaling and order information RI that said indication CSI selects carry out combined coding, perhaps,
Signaling and 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, PTI that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding.
The present invention has also correspondingly proposed a kind of multidrop channel feedback information terminal; This feedback terminal is used for according to the indication of network side M ' cover CSI being fed back; Wherein, Network side be the terminal cycle CSI feedback and/or aperiodic the CSI feedback specify N cover to need the CSI of feedback, N be the natural number greater than 1, M ' is greater than zero and be not more than the natural number of N.
Below in conjunction with specific embodiment technical scheme of the present invention is done further explain.
The base station has disposed 3 cover CSI-RS to UE, and generally each node configuration 1 is overlapped CSI, but some other situation are also arranged.UE is according to this 3 cover CSI-RS, and measures according to the rules according to the configuration parameter of high level, obtains three cover CSI, and CSI comprises one or more among RI, CQI, the PMI.
UE can select a best cover among the 3 cover CSI, feeds back, such as, selected the 1st cover CSI.
UE can be what to select that the first cover CSI carries out feedack and is transferred to the base station through PUCCH, such as, through 2bit, the control signaling of 4 states, concrete state is as shown in table 1:
| 00 | Select the first cover CSI |
| 01 | Select the second cover CSI |
| 10 | Select the 3rd cover CSI |
| 11 | Keep |
Table 1
UE can increase a Report Type and feed back this 2bit signaling.
The base station has disposed 3 cover CSI-RS to UE, and generally each node configuration 1 is overlapped CSI, but some other situation are also arranged.UE is according to this 3 cover CSI-RS, and measures according to the rules according to the configuration parameter of high level, obtains three cover CSI, and CSI comprises one or more among RI, CQI, the PMI.
UE can select a best cover among the 3 cover CSI, feeds back, such as, selected the 1st cover CSI.
UE can be what to select that the indication information that the first cover CSI feeds back is transferred to the base station through PUCCH, and is similar such as the control signaling and the embodiment 1 of 4 states.
Above-mentioned indication information can carry out combined coding with the RI of this cover CSI that selects.For COMP, a plurality of nodes generally all are the situation of low-rank, therefore for the situation that needs the multiple spot feedback, the value that can limit RI for 1,2}, the state that relates to of combined coding can be as shown in table 2 so:
| 000 | Select the 1st cover CSI, RI=1 |
| 001 | Select the 1st cover CSI, RI=2 |
| 010 | Select the 2nd cover CSI, RI=1 |
| 011 | Select the 2nd cover CSI, RI=2 |
| 100 | Select the 3rd cover CSI, RI=1 |
| 101 | Select the 3rd cover CSI, RI=2 |
| 110 | Select the 4th cover CSI, RI=1 |
| 111 | Select the 4th cover CSI, RI=2 |
Table 2
Embodiment 3
In the present embodiment, indication information can be with RI, PTI combined coding, and concrete condition is as shown in table 3:
| 0000 | Select the 1st cover CSI, RI=1, PTI=0 |
| 0001 | Select the 1st cover CSI, RI=1, PTI=1 |
| 0010 | Select the 1st cover CSI, RI=2, PTI=0 |
| 0011 | Select the 1st cover CSI, RI=2, PTI=1 |
| 0100 | Select the 2nd cover CSI, RI=1, PTI=0 |
| 0101 | Select the 2nd cover CSI, RI=1, PTI=1 |
| 0110 | Select the 2nd cover CSI, RI=2, PTI=0 |
| 0111 | Select the 2nd cover CSI, RI=2, PTI=1 |
| 1000 | Select the 3rd cover CSI, RI=1, PTI=0 |
| 1001 | Select the 3rd cover CSI, RI=1, PTI=1 |
| 1010 | Select the 3rd cover CSI, RI=2, PTI=0 |
| 1011 | Select the 3rd cover CSI, RI=2, PTI=1 |
| 1100 | Select the 4th cover CSI, RI=1, PTI=0 |
| 1101 | Select the 4th cover CSI, RI=1, PTI=1 |
| 1110 | Select the 4th cover CSI, RI=2, PTI=0 |
| 1111 | Select the 4th cover CSI, RI=2, PTI=1 |
Table 3
Embodiment 4
Similar with embodiment 2, be selected the sub-district when being 8 antennas, indication information can be with RI, i1 combined coding.Restriction RI=1,2, RI+i1 is 4 bit at present, can increase by the indication information of 2 bit.
Embodiment 5
The base station has disposed 3 cover CSI-RS to UE, and generally each node configuration 1 is overlapped CSI, but some other situation are also arranged.UE is according to this 3 cover CSI-RS, and measures according to the rules according to the configuration parameter of high level, obtains three cover CSI, and CSI comprises one or more among RI, CQI, the PMI.
UE can select two best covers among the 3 cover CSI, feeds back, such as, selected the 1st, 2 cover CSI.
UE can be what to select that the first cover CSI carries out feedack and is transferred to the base station through PUCCH, such as through 2bit, and the control signaling of 4 states, concrete state is as shown in table 4:
| 00 | Select the first, two cover CSI |
| 01 | Select the second, three cover CSI |
| 10 | Select the first, three cover CSI |
| 11 | Keep |
Table 4
Embodiment 6
The base station has disposed 2 cover CSI-RS to UE, and generally each node configuration 1 is overlapped CSI, but some other situation are also arranged.UE is according to this 2 cover CSI-RS, and measures according to the rules according to the configuration parameter of high level, obtains 2 cover CSI, and CSI comprises one or more among RI, CQI, the PMI.
UE can select 1 best among 2 cover CSI cover, feeds back, such as, selected the 1st cover CSI.
UE can be what to select that the first cover CSI carries out feedack and is transferred to the base station through PUCCH, such as through 1bit, and the control signaling of 2 states, concrete state is as shown in table 5:
| 00 | Select the 1st cover CSI |
| 01 | Select the 2nd cover CSI |
Table 5
Embodiment 7
The RRC signaling can be passed through in the base station, and notice is given UE, informs that it should overlap the CSI kind from N and select how much cover feeds back.
Embodiment 8
The base station can be that UE has disposed 4 cover CSI-RS through high-level signaling, and generally each node configuration 1 is overlapped CSI, but some other situation are also arranged.
The base station further can point out through signaling, aperiodic is when feeding back, and which cover CSI-RS each the measurement is based on:
Such as, trigger once aperiodic CSI feedback through signaling, and indication specifically is to measure the corresponding CSI of which cover CSI-RS:
Therefore indication signaling can be the mode of bitmap, like 4 cover CSI-RS here, needs the 4bit indication signaling, can with aperiodic the CSI feedback the triggering signaling transmit together:
Such as, trigger the 1st cover CSI feedback, can be 0001 indication, trigger 1,3 cover CSI feedback, can be 0101, triggering the 2nd cover can be 0010.
After the terminal obtains indication,, measure and feedback corresponding C SI information according to the indication of base station.
More than be merely preferred case study on implementation of the present invention; Be not limited to the present invention; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Obviously, it is apparent to those skilled in the art 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; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; 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.
Claims (17)
1. a multidrop channel information feedback method is characterized in that, this method comprises:
Network side be the terminal cycle CSI feedback and/or aperiodic the CSI feedback specify N cover to need the channel condition information CSI of feedback, and be used for the channel condition information measurement for said CSI disposes corresponding channel state information reference signals CSI-RS;
The terminal selects the M cover CSI among the said N cover CSI to feed back; And with the selection information notification network side of CSI, perhaps, network side is selected M ' the cover CSI among the N cover CSI; And indicating terminal feeds back said M ' cover CSI; Wherein, N is the natural number greater than 1, and M, M ' are for greater than zero and be not more than the natural number of N.
2. multidrop channel information feedback method according to claim 1 is characterized in that, the value of said M is predesignated or disposed through signaling by network side.
3. multidrop channel information feedback method according to claim 1 is characterized in that, the value of said M or M ' is 1 or 2.
4. multidrop channel information feedback method according to claim 1; It is characterized in that; When said M or M ' are q; Said terminal with the selection information notification network side of CSI is: the terminal uses
information or
individual mode bit to indicate the CSI of selection, and q is for greater than zero and be not more than the natural number of N.
5. according to each described multidrop channel information feedback method of claim 1 to 4; It is characterized in that said terminal with the selection information notification network side of CSI is: the selection information notification network side of the signaling of the indication CSI selection in the upstream physical layer channel with CSI passed through at said terminal.
6. multidrop channel information feedback method according to claim 5 is characterized in that, the signaling that said terminal is selected through indication CSI with the selection information notification network side of CSI is:
Signaling and order information RI that said indication CSI selects carry out combined coding, perhaps,
Signaling and 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, PTI that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding.
7. a multidrop channel information feedback system is characterized in that, this system comprises network side and terminal, wherein,
Said network side is used to the cycle CSI feedback at terminal and/or the CSI that aperiodic, the CSI feedback specified the N cover to feed back, and measures for said CSI configuration corresponding C SI-RS is used for channel condition information;
Said terminal is used for selecting the M cover CSI of said N cover CSI to feed back, and with the selection information notification network side of CSI, wherein, N be the natural number greater than 1, and M is for greater than zero and be not more than the natural number of N.
8. multidrop channel information feedback system according to claim 7 is characterized in that, the value of said M is predesignated or disposed through signaling by network side.
9. multidrop channel information feedback system according to claim 7; It is characterized in that; When said M was q, said terminal with the selection information notification network side of CSI was: the terminal uses
information or
individual mode bit to indicate the CSI of selection.
10. according to each described multidrop channel information feedback system of claim 7 to 9; It is characterized in that said terminal with the selection information notification network side of CSI is: the selection information notification network side of the signaling of the indication CSI selection in the upstream physical layer channel with CSI passed through at said terminal.
11. multidrop channel information feedback system according to claim 10 is characterized in that, the signaling that said terminal is selected through indication CSI with the selection information notification network side of CSI is:
Signaling and order information RI that said indication CSI selects carry out combined coding, perhaps,
Signaling and 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, PTI that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding.
12. a multidrop channel information feedback system is characterized in that this system comprises network side and terminal, wherein,
Said network side is used to the cycle CSI feedback at terminal and/or the CSI that aperiodic, the CSI feedback specified the N cover to feed back, and measures for said CSI configuration corresponding C SI-RS is used for channel condition information; And select M ' the cover CSI among the N cover CSI, indicating terminal feeds back said M ' cover CSI;
Said terminal is used for according to the indication of network side said M ' cover CSI being fed back, and wherein, N be the natural number greater than 1, and M ' is for greater than zero and be not more than the natural number of N.
13. a multidrop channel feedback information terminal is characterized in that, this multidrop channel feedback information terminal comprises: selected cell, feedback unit and notification unit; Wherein,
Said selected cell; Being used at network side is the cycle CSI feedback at terminal and/or the channel condition information CSI that aperiodic, the CSI feedback specified N cover needs to feed back; And, said CSI is used for selecting the M cover CSI among the N cover CSI, wherein under the scene that channel condition information measures for disposing corresponding channel state information reference signals CSI-RS; N is the natural number greater than 1, and M is for greater than zero and be not more than the natural number of N;
Said feedback unit, the M cover CSI that is used for said selected cell is selected feeds back;
Said notification unit is used for the selection information notification network side with said CSI.
14. multidrop channel feedback information according to claim 13 terminal; It is characterized in that; When said M was q, said terminal with the selection information notification network side of CSI was: the terminal uses
information or
individual mode bit to indicate the CSI of selection.
15. multidrop channel feedback information according to claim 13 terminal; It is characterized in that said notification unit with the selection information notification network side of CSI is: the selection information notification network side of the signaling of the indication CSI selection in the upstream physical layer channel with CSI passed through at said terminal.
16. multidrop channel feedback information according to claim 13 terminal is characterized in that, said notification unit selects signaling with the selection information notification network side of CSI to be through indication CSI:
Signaling and order information RI that said indication CSI selects carry out combined coding, perhaps,
Signaling and 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, PTI that said indication CSI selects carry out combined coding, perhaps,
Signaling and RI, 8 antennas, the first precoding i1 that said indication CSI selects carry out combined coding.
17. multidrop channel feedback information terminal; It is characterized in that; This multidrop channel feedback information terminal is used for according to the indication of network side M ' cover CSI being fed back, and wherein, network side is the cycle CSI feedback at terminal and/or the CSI that CSI feedback appointment aperiodic N cover needs feedback; N is the natural number greater than 1, and M ' is for greater than zero and be not more than the natural number of N.
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| CN102377469B (en) | 2018-08-28 |
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