CN106685576B - A kind of method, apparatus of feeding back channel state information, terminal and base station - Google Patents
A kind of method, apparatus of feeding back channel state information, terminal and base station Download PDFInfo
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- CN106685576B CN106685576B CN201510744948.2A CN201510744948A CN106685576B CN 106685576 B CN106685576 B CN 106685576B CN 201510744948 A CN201510744948 A CN 201510744948A CN 106685576 B CN106685576 B CN 106685576B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/0486—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking channel rank into account
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0675—Space-time coding characterised by the signaling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- Signal Processing (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of method, apparatus of feeding back channel state information, terminal and base station, the method for the feedback channel information applied to terminal includes: the first report cycle for receiving the beam index information of base station configuration；When the first report cycle reaches, Xiang Jizhan reports beam index information；Rank indication information is reported on the next sub-frame of uplink adjacent with the sub-frame of uplink of the beam index information is reported each time.The solution of the present invention, after capable of reporting beam index information at the terminal, the corresponding report rank indication information of update is reported immediately, so that the instruction of subsequent pre-coding matrix sum of ranks channel quality can be calculated according to the rank indication information updated at this time, avoid reporting not in time for rank indication information and caused by the mistake that indicates of pre-coding matrix sum of ranks channel quality report.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of method, apparatus of feeding back channel state information, end
End and base station.
Background technique
Third generation multi-input multi-output system (3D-MIMO) is to promote cellular system spectrum efficiency, enhances the network coverage
Important means.Its main method is the two-dimensional antenna array by base station end, is realized to the vertical dimension for sending signal and horizontal dimension
Wave beam forming.Compared to original horizontal dimension wave beam forming, the wave beam of vertical dimension is sent thinner more quasi- in 3D-MIMO, thus greatly
The spectrum efficiency and Traffic Channel of width lifting system cover.
3D-MIMO system design important component be how the channel information of feedback terminal, especially terminal hang down
Straight dimension directional information, so that the vertical dimension direction for enabling base station to be directed at terminal sends signal.A kind of feedback terminal vertical dimension letter
The method of road information is to send more sets channel information measurement reference signal (CSI-RS), and every set CSI-RS is assigned by vertical dimension wave beam
Shape is targeted by a vertical direction.User measures the CSI-RS on different vertical direction, it can be learnt that in corresponding vertical direction
Signal strength simultaneously feeds back to base station；Base station can be fed back according to terminal carries out corresponding down beam shaping, as shown in Figure 1.
It should be noted that the CSI-RS0 in Fig. 1 is not the port CSI-RS, but a set of port CSI-RS, often
Set CSI-RS may include multiple ports CSI-RS.Such as if horizontal dimension has eight antennas, then every set CSI-RS includes eight
The port CSI-RS, the antenna number corresponding to level dimension.
In existing multi-input multi-output system (MIMO) communication mechanism, terminal can measure a set of CSI-RS and report correspondence
Rank indication information (rank indicator, RI), pre-coding matrix instruction (precoding matrix indicator,
PMI) and channel quality indicates (channel quality indicator, CQI).In 3D-MIMO, since terminal is configured
More set CSI-RS, terminal can directly measure cover CSI-RS, and accordingly report and cover RI/PMI/CQI more.Select most strong in base station
CQI carry out corresponding vertical dimension wave beam forming and downlink transfer.
But more set RI/PMI/CQI is reported to will increase the expense of uplink feedback, the tricks of expense and CSI-RS are direct
It is directly proportional.In order to reduce uplink expense, terminal can only the corresponding beam index information of the most strong CQI of feedback (beam index,
) and RI/CQI/PMI corresponding with BI BI.It is assumed that vertical dimension sends 8 sets of CSI-RS altogether, then uplink expense is fixed increases by 3 bits
BI, set RI/CQI/PMIs more compared to directly feedback, feedback overhead substantially reduces.Based on above-mentioned technology, terminal can feed back BI with
It indicates vertical dimension beam direction, and feeds back the RI/CQI/PMI for corresponding to this BI.
However, in existing system, information when RI is generally long, and CQI/PMI is then short-term information.It is reported periodically
In, the typical cycle of RI is (for example) 200 milliseconds (ms), and the typical cycle of CQI/PMI is (for example) 5ms or 10ms；Wherein
The value of CQI/PMI is calculated and is reported according to the last RI reported.
In 3D-MIMO, other than RI/CQI/PMI, it is also necessary to report BI.Due to the vertical dimension mobility one of terminal
As lower, information when BI is generally long.In addition, RI/CQI/PMI needs basis when selecting different CSI-RS vertical direction
BI that the last time reports is calculated.
A kind of possible BI report method is that BI and RI are done combined coding, is reported in a subframe.But due to BI
Joining together with RI, information bit is more, and the bit error rate and uplink that will affect uplink information cover.Therefore, from ensure uplink cover
Angle for, BI should be reported in different sub-frame of uplink from RI.General method is in BI and RI separate configurations
The period of report and offset.
But when giving the correct time on BI and RI are in different sub-frame of uplink, there is the CQI/PMI of part may be according to mistake
RI is calculated, as shown in Figure 2.After BI is reported, subsequent CQI/PMI can be counted according to the RI that the last time reports
It calculates.But BI before being basis due to the RI that reports of the last time is calculated, and is not yet updated according to newest BI,
The RI that the last time reports is actually mistake, so that the CQI/PMI between BI and RI be caused to calculate mistake.
The above problem is likely to cause a large amount of CQI/PMI and calculates mistake.Such as when the report cycle of BI and RI are
When 200ms, the offset of BI is 100ms and the offset of RI when being 0ms, the CQI/PMI of half be according to the RI of mistake come
It is calculated, to seriously affect the downstream rate of system.
Summary of the invention
In order to overcome the above-mentioned technical problems in the prior art, the embodiment provides a kind of feedback channels
Method, apparatus, terminal and the base station of status information report update after capable of reporting at the terminal beam index information immediately
Rank indication information so that subsequent pre-coding matrix sum of ranks channel quality instruction can according to the rank indication information updated at this time come
Calculate, avoid reporting not in time for rank indication information and caused by the mistake that indicates of pre-coding matrix sum of ranks channel quality
Report.
One aspect according to an embodiment of the present invention provides a kind of method of feeding back channel state information, comprising:
Receive the first report cycle of the beam index information of base station configuration；
When first report cycle reaches, the base station Xiang Suoshu reports the beam index information；
Order is reported on the next sub-frame of uplink adjacent with the sub-frame of uplink of the beam index information is reported each time
Indicate information.
Wherein, in above scheme, the method also includes:
Receive the second report cycle of the rank indication information of base station configuration；
When second report cycle reaches, the base station Xiang Suoshu reports the rank indication information.
Wherein, in above scheme, the method also includes:
Receive base station configuration reports the first offset of the beam index information, and reports the rank indication information
The second offset；
Wherein, the first offset BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset
Two offsets, Δ t are equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=BI_Period/N,
BI_Period is first report cycle, and N and M are integer.
Wherein, in above scheme, the method also includes:
Receive the third report cycle of the pre-coding matrix sum of ranks channel quality instruction of base station configuration；
When the third report cycle reaches, the base station Xiang Suoshu reports channel quality described in the pre-coding matrix sum of ranks
Instruction.
Wherein, in above scheme, the pre-coding matrix sum of ranks channel quality instruction is prelisted according to positioned at described respectively
What code rank of matrix and the rank indication information for reporting last update before the moment of channel quality instruction determined, the order
Indicate that information is according to the beam index information for reporting last update before the moment for being located at the rank indication information
Determining.
Other side according to an embodiment of the present invention additionally provides a kind of method of feeding back channel state information, comprising:
The first report cycle of beam index information is reported for terminal configuration；
When first report cycle reaches, the beam index information that the terminal reports is received；
The terminal is received in the next uplink adjacent with the sub-frame of uplink of the beam index information is reported each time
The rank indication information reported in subframe.
Wherein, in above scheme, the method also includes:
The second report cycle of the rank indication information is configured for the terminal；
When second report cycle reaches, the rank indication information that the terminal reports is received.
Wherein, in above scheme, the method also includes:
The respectively described terminal configuration reports the first offset of the beam index information, and reports the order instruction
Second offset of information；
Wherein, the first offset BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset
Two offsets, Δ t are equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=BI_Period/N,
BI_Period is first report cycle, and N and M are integer.
Wherein, in above scheme, the method also includes:
For the third report cycle of terminal allocating pre-coding matrix sum of ranks channel quality instruction；
When the third report cycle reaches, channel described in the pre-coding matrix sum of ranks that the terminal reports is received
Quality instruction.
Wherein, in above scheme, the pre-coding matrix sum of ranks channel quality instruction is prelisted according to positioned at described respectively
What code rank of matrix and the rank indication information for reporting last update before the moment of channel quality instruction determined, the order
Indicate that information is according to the beam index information for reporting last update before the moment for being located at the rank indication information
Determining.
Other side according to an embodiment of the present invention additionally provides a kind of device of feeding back channel state information, comprising:
First receiving module, the first report cycle of the beam index information for receiving base station configuration；
First reporting module, for when first report cycle reaches, the base station Xiang Suoshu to report the beam index
Information；
Second reporting module, for adjacent with the sub-frame of uplink of the beam index information is reported each time next
Rank indication information is reported on sub-frame of uplink.
Wherein, in above scheme, described device further include:
Second receiving module, the second report cycle of the rank indication information for receiving base station configuration；
Third reporting module, for when second report cycle reaches, the base station Xiang Suoshu to report the order instruction to believe
Breath.
Wherein, in above scheme, described device further include:
Third receiving module, the first offset for reporting the beam index information configured for receiving base station, and
Report the second offset of the rank indication information；
Wherein, the first offset BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset
Two offsets, Δ t are equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=BI_Period/N,
BI_Period is first report cycle, and N and M are integer.
Wherein, in above scheme, described device further include:
4th receiving module reports week for receiving the third of pre-coding matrix sum of ranks channel quality instruction of base station configuration
Phase；
4th reporting module, for when the third report cycle reaches, the base station Xiang Suoshu to report the precoding square
Channel quality instruction described in battle array sum of ranks.
Wherein, in above scheme, the pre-coding matrix sum of ranks channel quality instruction is prelisted according to positioned at described respectively
What code rank of matrix and the rank indication information for reporting last update before the moment of channel quality instruction determined, the order
Indicate that information is according to the beam index information for reporting last update before the moment for being located at the rank indication information
Determining.
Other side according to an embodiment of the present invention additionally provides a kind of device of feeding back channel state information, comprising:
First configuration module, for reporting the first report cycle of beam index information for terminal configuration；
5th receiving module, for receiving the wave beam that the terminal reports when first report cycle reaches
Index information；
6th receiving module, for receive the terminal with the sub-frame of uplink that reports the beam index information each time
The rank indication information reported on adjacent next sub-frame of uplink.
Wherein, in above scheme, described device further include:
Second configuration module, for configuring the second report cycle of the rank indication information for the terminal；
7th receiving module, for receiving the order that the terminal reports and referring to when second report cycle reaches
Show information.
Wherein, in above scheme, described device further include:
Third configuration module, for being respectively the first offset that terminal configuration reports the beam index information,
And report the second offset of the rank indication information；
Wherein, the first offset BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset
Two offsets, Δ t are equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=BI_Period/N,
BI_Period is first report cycle, and N and M are integer.
Wherein, in above scheme, described device further include:
4th configuration module, the third for indicating for the terminal allocating pre-coding matrix sum of ranks channel quality report week
Phase；
8th receiving module described prelists for when the third report cycle reaches, receive that the terminal reports
Code rank of matrix and channel quality instruction.
Wherein, in above scheme, the pre-coding matrix sum of ranks channel quality instruction is prelisted according to positioned at described respectively
What code rank of matrix and the rank indication information for reporting last update before the moment of channel quality instruction determined, the order
Indicate that information is according to the beam index information for reporting last update before the moment for being located at the rank indication information
Determining.
Other side according to an embodiment of the present invention additionally provides a kind of terminal, including feedback channel described above
The device of status information.
Other side according to an embodiment of the present invention additionally provides a kind of base station, including feedback channel described above
The device of status information.
The beneficial effect of the embodiment of the present invention is:
In the method for the feeding back channel state information of the embodiment of the present invention, terminal passes through the beam index for receiving base station configuration
The report cycle of information reports beam index information to base station when report cycle is reached, and reports beam index each time
After information, rank indication information is reported in time, so that reporting moment and next rank indication information in beam index information
It reports in the time interval between the moment, at the time of there is no reporting pre-coding matrix sum of ranks channel quality to indicate, thus, so that
Subsequent pre-coding matrix sum of ranks channel quality instruction can be calculated according to the rank indication information of recent renewal, avoided order and referred to
Show reporting not in time for information and caused by the mistake that indicates of pre-coding matrix sum of ranks channel quality report, optimize under system
Scanning frequency rate.
Detailed description of the invention
Fig. 1 shows the CSI-RS schematic diagrames for passing through vertical dimension wave beam forming in the prior art；
Fig. 2 indicates that CQI/PMI may be according to the RI of mistake in the periodicity of channel state information reports in the prior art
Come the schematic illustration calculated；
Fig. 3 indicates the method flow diagram of the feeding back channel state information of first embodiment of the invention；
Fig. 4 indicates the method flow diagram of the feeding back channel state information of second embodiment of the invention；
Fig. 5 indicates the structural block diagram of the device of the feeding back channel state information of third embodiment of the invention；
Fig. 6 indicates the structural block diagram of the device of the feeding back channel state information of fourth embodiment of the invention；
Fig. 7 indicates the periodicity of the channel state information of the embodiment of the present invention in reporting when reporting beam index information every time
Immediately following the schematic illustration for reporting rank indication information；
Fig. 8 shows the beam index information and rank indication information of the embodiment of the present invention respectively according to respective period and offset
Measure the schematic illustration reported.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
First embodiment
One aspect according to an embodiment of the present invention provides a kind of method of feeding back channel state information, is applied to eventually
End, this method, firstly, receiving the first report cycle of the beam index information of base station configuration；Then, when described first reports week
When phase reaches, the base station Xiang Suoshu reports the beam index information；Finally, with report the beam index information each time
Rank indication information is reported on the adjacent next sub-frame of uplink of sub-frame of uplink.Therefore, the fed-back channel status of the embodiment of the present invention
The method of information, the mistake for effectively preventing the instruction of pre-coding matrix sum of ranks channel quality are reported to the bad of system descending rate
It influences.
As shown in figure 3, this method comprises:
Step S31, the first report cycle of the beam index information of base station configuration is received.
The method of the feeding back channel state information of the embodiment of the present invention is applied to terminal.Wherein, in 3D-MIMO system,
Terminal is needed to base station feedback channel state information, which includes: beam index information, rank indication information, pre-
The instruction of encoder matrix sum of ranks channel quality.Wherein, beam index information is used to indicate terminal and needs which set reported to base station
Rank indication information, pre-coding matrix order and the channel quality instruction of the port CSI-RS, and rank indication information is that basis is located at
What the beam index information for reporting last update before the moment of the rank indication information determined, pre-coding matrix order
It is nearest before the moment according to reporting for pre-coding matrix sum of ranks channel quality instruction is located at respectively with channel quality instruction
What the rank indication information once updated determined.
Step S33, when first report cycle reaches, the base station Xiang Suoshu reports the beam index information.
When terminal is to base station reporting status information of channel, terminal can be in the channel state information for receiving base station transmission
When request instruction, Xiang Jizhan reports corresponding channel state information, naturally it is also possible to according to base station configuration report cycle come into
Row periodically reports.In the method for the feeding back channel state information of the embodiment of the present invention, beam index information is using periodically
The mode reported, when reaching the first report cycle of beam index information, terminal just reports a beam index to base station
Information.
Certainly, the other information for including in channel state information, such as pre-coding matrix sum of ranks channel quality are indicated, together
Sample can be by the way of periodic report, then terminal needs to receive the pre-coding matrix sum of ranks channel quality instruction of base station configuration
Third report cycle, and when the third report cycle reaches, the base station Xiang Suoshu reports described in the pre-coding matrix sum of ranks
Channel quality instruction.
Step S35, in the next sub-frame of uplink adjacent with the sub-frame of uplink of the beam index information is reported each time
On report rank indication information.
It is, terminal is when the first report cycle of beam index information reaches, Xiang Jizhan reports a beam index
Information, and an order actively is reported to base station on next sub-frame of uplink of this sub-frame of uplink for reporting beam index information
Indicate information, as shown in Figure 7.Therefore the method for the feeding back channel state information of the embodiment of the present invention, it is every what is reported to base station
Behind one beam index information, a last updated rank indication information is all closely followed, so that subsequent pre-coding matrix order
It can be calculated according to the rank indication information updated at this time with channel quality instruction, avoid reporting not in time for rank indication information
The mistake of the instruction of pre-coding matrix sum of ranks channel quality caused by and reports.
Certainly, it for rank indication information, can also be reported according to the corresponding report cycle that base station configures, that is, eventually
The second report cycle that can receive the rank indication information of base station configuration is held, and when second report cycle reaches, to
The base station reports the rank indication information.It is, terminal with report the sub-frame of uplink of beam index information adjacent
It is reported on next sub-frame of uplink in the time after rank indication information, terminal can also be according to the report cycle of rank indication information oneself
To be reported.
It on the other hand, can also be by the way that wave be arranged when beam index information and rank indication information are performed both by periodic report
The second report cycle and the second offset of first report cycle of beam index information and the first offset and rank indication information
Amount, comes so that terminal reports beam index information to base station according to the first report cycle and the first offset, according to second round
Rank indication information is reported to base station with the second offset, so that reporting the moment to refer to next order in beam index information
Show in the time interval of information reported between the moment, at the time of there is no reporting pre-coding matrix sum of ranks channel quality to indicate.
In particular it is required that the first offset BI_offset=M*RI_Period+RI_ of setting beam index information
Wherein, RI_offset is the second offset to offset- Δ t, and Δ t is equal to 1 millisecond, and RI_Period reports week for described second
Phase；And it is integer that the first report cycle BI_Period=N*RI_Period, N and M, which is arranged,.
For example:
If RI_Period=50ms, RI_offset=25ms, Δ t=1ms, N=2, M=1；
Then BI_Period=2*50ms=100ms, BI_offset=1*50ms+25ms-1ms=74ms.
So, terminal reports beam index information to base station according to BI_Period and BI_offset, according to RI_
It, can be as shown in figure 8, having closely followed one behind each BI when Period and RI_offset reports rank indication information to base station
A RI, for example, reported a BI in 74ms, so reported a RI in 75ms, due to each BI and RI when
Length is 1ms, thus reported in 74ms BI and 75ms when the RI that reports between, terminal can not report precoding to base station
Therefore rank of matrix and channel quality instruction avoid the instruction of pre-coding matrix sum of ranks channel quality according to the order updated not in time
Instruction information is calculated, and the mistake so as to cause the instruction of pre-coding matrix sum of ranks channel quality reports.
Second embodiment
Other side according to an embodiment of the present invention additionally provides a kind of method of feeding back channel state information, application
In base station, this method, firstly, reporting the first report cycle of beam index information for terminal configuration；Then, on described first
When the period being reported to reach, the beam index information that the terminal reports is received；Finally, receive the terminal with each time on
The rank indication information reported on the next sub-frame of uplink for reporting the sub-frame of uplink of the beam index information adjacent.Therefore, this hair
The method of the feeding back channel state information of bright embodiment, avoid reporting not in time for rank indication information and caused by precoding square
The mistake of battle array sum of ranks channel quality instruction reports, and optimizes the downstream rate of system.
As shown in figure 4, this method comprises:
Step S41, the first report cycle of beam index information is reported for terminal configuration.
The method of the feeding back channel state information of the embodiment of the present invention is applied to base station.Wherein, in 3D-MIMO system,
Base station needs to receive terminal feeding back channel state information, and carries out corresponding down beam shaping according to channel state information.
The channel state information includes: that beam index information, rank indication information, pre-coding matrix sum of ranks channel quality refer to
Show.Wherein, beam index information is used to indicate the rank indication information, pre- which port set CSI-RS is terminal need to report to base station
Encoder matrix order and channel quality instruction, and rank indication information be according to be located at the rank indication information report the moment it
What the beam index information of preceding last update determined, the instruction of pre-coding matrix sum of ranks channel quality is according to position respectively
In the pre-coding matrix sum of ranks channel quality instruction report the moment before last update the rank indication information it is true
Fixed.
Step S43, when first report cycle reaches, the beam index information that the terminal reports is received.
When base station receives the channel state information of terminal feedback, base station can be by sending channel state information request to terminal
The mode of signaling, actively to terminal request channel state information, alternatively, base station can configure corresponding channel state information for terminal
Report cycle, so that terminal actively can report corresponding channel state information to base station when report cycle reaches.
Wherein, base station can be arrived after the first report cycle for configuring beam index information for terminal in the first report cycle
Up to when, receive the beam index information that reports of terminal；On for terminal configuration codes rank of matrix and the third of channel quality instruction
After reporting the period, when third report cycle reaches, the encoder matrix sum of ranks channel quality instruction that terminal reports is received.
Step S45, the terminal is received under adjacent with the sub-frame of uplink of the beam index information is reported each time
The rank indication information reported on one sub-frame of uplink
Base station receives once on next sub-frame of uplink that terminal reports the sub-frame of uplink of beam index information each time
Rank indication information, so that all closely following a last updated order instruction behind each received beam index information of base station
Information, so that the instruction of subsequent pre-coding matrix sum of ranks channel quality can be counted according to the rank indication information updated at this time
Calculate, avoid reporting not in time for rank indication information and caused by the mistake that indicates of pre-coding matrix sum of ranks channel quality report.
In addition, for rank indication information, base station can also configure report cycle for rank indication information, i.e. the second report cycle,
And when the second report cycle reaches, the rank indication information that terminal reports is received.It is, base station is believed from beam index is reported
After receiving rank indication information on the adjacent next sub-frame of uplink of the sub-frame of uplink of breath, base station terminal can also be according to for order instruction
Second report cycle of information configuration carrys out the rank indication information that periodic receipt terminal reports.
On the other hand, when base station configures beam index information and rank indication information is performed both by periodic report, can also lead to
Cross the first report cycle of setting beam index information and the second report cycle of the first offset and rank indication information and the
Two offsets are come so that terminal reports beam index information to base station according to the first report cycle and the first offset, according to
Two cycles and the second offset report rank indication information to base station so that base station received adjacent beams index information with
Between rank indication information (time of reception of beam index information was located at before the time of reception of rank indication information), do not receive pre-
The instruction of encoder matrix sum of ranks channel quality.
In particular it is required that the first offset BI_offset=M*RI_Period+RI_ of setting beam index information
Wherein, RI_offset is the second offset to offset- Δ t, and Δ t is equal to 1 millisecond, and RI_Period reports week for described second
Phase；And it is integer that the first report cycle BI_Period=N*RI_Period, N and M, which is arranged,.
Therefore, the method for the feeding back channel state information of the embodiment of the present invention, can at the terminal beam index information it
Afterwards, the rank indication information of update is reported immediately, so that the instruction of subsequent pre-coding matrix sum of ranks channel quality can be according at this time
The rank indication information of update calculates, avoid reporting not in time for rank indication information and caused by pre-coding matrix sum of ranks channel
The mistake of quality instruction reports.
3rd embodiment
Other side according to an embodiment of the present invention additionally provides a kind of device of feeding back channel state information, application
In terminal, as shown in figure 5, should be applied to the device 500 of the feeding back channel state information of terminal, comprising:
First receiving module 501, the first report cycle of the beam index information for receiving base station configuration；
First reporting module 502, for when first report cycle reaches, the base station Xiang Suoshu to report the wave beam rope
Fuse breath；
Second reporting module 503, under adjacent with the sub-frame of uplink of the beam index information is reported each time
Rank indication information is reported on one sub-frame of uplink.
Optionally, described device further include:
Second receiving module 504, the second report cycle of the rank indication information for receiving base station configuration；
Third reporting module 505, for when second report cycle reaches, the base station Xiang Suoshu to report the order instruction
Information.
Optionally, described device further include:
Third receiving module 506, for receiving the first offset for reporting the beam index information of base station configuration, with
And report the second offset of the rank indication information；
Wherein, the first offset BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset
Two offsets, Δ t are equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=BI_Period/N,
BI_Period is first report cycle, and N and M are integer.
Optionally, described device further include:
4th receiving module 507, the third of the pre-coding matrix sum of ranks channel quality instruction for receiving base station configuration
Report the period；
4th reporting module 508, for when the third report cycle reaches, the base station Xiang Suoshu to report the precoding
Rank of matrix and channel quality instruction.
Optionally, the pre-coding matrix sum of ranks channel quality instruction is according to positioned at the pre-coding matrix sum of ranks respectively
What the rank indication information for reporting last update before the moment of channel quality instruction determined, the rank indication information is
It is determined according to the beam index information for reporting last update before the moment for being located at the rank indication information.
Fourth embodiment
Other side according to an embodiment of the present invention additionally provides a kind of device of feeding back channel state information, application
In base station, as shown in fig. 6, should be applied to the device 600 of the feeding back channel state information of base station, comprising:
First configuration module 601, for reporting the first report cycle of beam index information for terminal configuration；
5th receiving module 602, for receiving the wave that the terminal reports when first report cycle reaches
Beam index information；
6th receiving module 603, for receive the terminal with the uplink that reports the beam index information each time
The rank indication information reported on the adjacent next sub-frame of uplink of subframe
Optionally, described device further include:
Second configuration module 604, for configuring the second report cycle of the rank indication information for the terminal；
7th receiving module 605, for receiving the order that the terminal reports when second report cycle reaches
Indicate information.
Optionally, described device further include:
Third configuration module 606, for being respectively that the terminal configuration reports the first of the beam index information to deviate
Amount, and report the second offset of the rank indication information；
Wherein, the first offset BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset
Two offsets, Δ t are equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=BI_Period/N,
BI_Period is first report cycle, and N and M are integer.
Optionally, described device further include:
4th configuration module 607, the third for being indicated for the terminal allocating pre-coding matrix sum of ranks channel quality
Report the period；
8th receiving module 608, for when the third report cycle reach when, receive the terminal report it is described pre-
The instruction of channel quality described in encoder matrix sum of ranks.
Optionally, the pre-coding matrix sum of ranks channel quality instruction is according to positioned at the pre-coding matrix sum of ranks respectively
What the rank indication information for reporting last update before the moment of channel quality instruction determined, the rank indication information is
It is determined according to the beam index information for reporting last update before the moment for being located at the rank indication information.
5th embodiment
Other side according to an embodiment of the present invention additionally provides a kind of terminal, including above-mentioned applied to the anti-of terminal
Present the device of channel state information.
Sixth embodiment
Other side according to an embodiment of the present invention additionally provides a kind of base station, including above-mentioned applied to the anti-of base station
Present the device of channel state information.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person of the art is come
It says, can also make several improvements and retouch under the premise of not departing from principle of the present invention, these improvements and modifications also exist
In protection scope of the present invention.
Claims (14)
1. a kind of method of feeding back channel state information characterized by comprising
The first report cycle of the beam index information of base station configuration is received, beam index information is used to indicate terminal and needs to base
Station reports rank indication information, pre-coding matrix order and the channel quality instruction of which port set CSI-RS；
When first report cycle reaches, the base station Xiang Suoshu reports the beam index information；
Order instruction is reported on the next sub-frame of uplink adjacent with the sub-frame of uplink of the beam index information is reported each time
Information.
2. the method as described in claim 1, which is characterized in that the method also includes:
Receive the second report cycle of the rank indication information of base station configuration；
When second report cycle reaches, the base station Xiang Suoshu reports the rank indication information.
3. method according to claim 2, which is characterized in that the method also includes:
Receive base station configuration reports the first offset of the beam index information, and reports the of the rank indication information
Two offsets；
Wherein, the first offset BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset are described the
Two offsets, Δ t are equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=BI_Period/N,
BI_Period is first report cycle, and N and M are integer.
4. the method as described in claim 1, which is characterized in that the method also includes:
Receive the third report cycle of the pre-coding matrix sum of ranks channel quality instruction of base station configuration；
When the third report cycle reaches, the base station Xiang Suoshu reports channel quality described in the pre-coding matrix sum of ranks to refer to
Show.
5. method as claimed in claim 4, which is characterized in that the pre-coding matrix sum of ranks channel quality instruction is root respectively
According to the order instruction letter for reporting last update before the moment for being located at pre-coding matrix sum of ranks channel quality instruction
Breath determination, the rank indication information is according to the institute for reporting last update before the moment for being located at the rank indication information
State what beam index information determined.
6. a kind of method of feeding back channel state information characterized by comprising
The first report cycle of beam index information is reported for terminal configuration, beam index information is used to indicate terminal and needs to base
Station reports rank indication information, pre-coding matrix order and the channel quality instruction of which port set CSI-RS；
When first report cycle reaches, the beam index information that the terminal reports is received；
The terminal is received in the next sub-frame of uplink adjacent with the sub-frame of uplink of the beam index information is reported each time
On the rank indication information that reports.
7. method as claimed in claim 6, which is characterized in that the method also includes:
The second report cycle of the rank indication information is configured for the terminal；
When second report cycle reaches, the rank indication information that the terminal reports is received.
8. the method for claim 7, which is characterized in that the method also includes:
The respectively described terminal configuration reports the first offset of the beam index information, and reports the rank indication information
The second offset；
Wherein, the first offset BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset are described the
Two offsets, Δ t are equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=BI_Period/N,
BI_Period is first report cycle, and N and M are integer.
9. method as claimed in claim 6, which is characterized in that the method also includes:
For the third report cycle of terminal allocating pre-coding matrix sum of ranks channel quality instruction；
When the third report cycle reaches, channel quality described in the pre-coding matrix sum of ranks that the terminal reports is received
Instruction.
10. method as claimed in claim 9, which is characterized in that pre-coding matrix sum of ranks channel quality instruction is respectively
According to the order instruction for reporting last update before the moment for being located at pre-coding matrix sum of ranks channel quality instruction
What information determined, the rank indication information is to report last update before the moment according to positioned at the rank indication information
What the beam index information determined.
11. a kind of device of feeding back channel state information characterized by comprising
First receiving module, the first report cycle of the beam index information for receiving base station configuration, beam index information are used
Need to report rank indication information, pre-coding matrix order and the channel quality of which port set CSI-RS to base station in instruction terminal
Instruction；
First reporting module, for when first report cycle reaches, the base station Xiang Suoshu to report the beam index information；
Second reporting module, in the next uplink adjacent with the sub-frame of uplink of the beam index information is reported each time
Rank indication information is reported in subframe.
12. a kind of device of feeding back channel state information characterized by comprising
First configuration module, for reporting the first report cycle of beam index information for terminal configuration, beam index information is used
Need to report rank indication information, pre-coding matrix order and the channel quality of which port set CSI-RS to base station in instruction terminal
Instruction；
5th receiving module, for receiving the beam index that the terminal reports when first report cycle reaches
Information；
6th receiving module, for receiving the terminal adjacent with the sub-frame of uplink of the beam index information is reported each time
Next sub-frame of uplink on the rank indication information that reports.
13. a kind of terminal, which is characterized in that the device including feeding back channel state information as claimed in claim 11.
14. a kind of base station, which is characterized in that the device including feeding back channel state information as claimed in claim 12.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102237957A (en) * | 2010-05-07 | 2011-11-09 | 电信科学技术研究院 | Channel state information reporting method, system and device |
| CN102448113A (en) * | 2010-09-30 | 2012-05-09 | 中兴通讯股份有限公司 | Method and system for sending periodical channel state information |
| CN102469499A (en) * | 2010-11-16 | 2012-05-23 | 大唐移动通信设备有限公司 | Method and equipment for determining parameters for reporting channel state information |
| CN104734754A (en) * | 2013-12-20 | 2015-06-24 | 中兴通讯股份有限公司 | Beamforming weight training method and base station and terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8724684B2 (en) * | 2008-03-24 | 2014-05-13 | Texas Instruments Incorporated | CQI feedback structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102237957A (en) * | 2010-05-07 | 2011-11-09 | 电信科学技术研究院 | Channel state information reporting method, system and device |
| CN102448113A (en) * | 2010-09-30 | 2012-05-09 | 中兴通讯股份有限公司 | Method and system for sending periodical channel state information |
| CN102469499A (en) * | 2010-11-16 | 2012-05-23 | 大唐移动通信设备有限公司 | Method and equipment for determining parameters for reporting channel state information |
| CN104734754A (en) * | 2013-12-20 | 2015-06-24 | 中兴通讯股份有限公司 | Beamforming weight training method and base station and terminal |
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