CN106685576A - Method, apparatus, terminal for feeding-back channel state information and base station - Google Patents
Method, apparatus, terminal for feeding-back channel state information and base station Download PDFInfo
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- CN106685576A CN106685576A CN201510744948.2A CN201510744948A CN106685576A CN 106685576 A CN106685576 A CN 106685576A CN 201510744948 A CN201510744948 A CN 201510744948A CN 106685576 A CN106685576 A CN 106685576A
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- beam index
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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
-
- 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
-
- 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
-
- 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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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a method, an apparatus, a terminal for feeding-back channel state information and a base station. The method comprises the following steps: receiving the first reporting cycle of the beam index information configured by the base station; when the first reporting cycle is reached, reporting the beam index information to the base station; and reporting the rank indication information on the uplink sub-frame just next to the uplink sub-frame of the beam index information reported each time. According to the technical schemes of the invention, it is possible to report the corresponding updated rank indication information immediately after the terminal reports the beam index information so that the subsequent preset code matrix rank and the channel quality indication could be calculated according to the currently updated rank indication information and that the erroneous reporting of the preset code matrix rank and the channel quality indication incurred from not so instant reporting can be avoided.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of method of feeding back channel state information,
Device, terminal and base station.
Background technology
Third generation multi-input multi-output system (3D-MIMO) is to lift cellular system spectrum efficiency, is strengthened
The important means of the network coverage.Its main method is the two-dimensional antenna array by base station end, is realized to sending
The vertical dimension of signal and level dimension wave beam forming.Original level dimension wave beam forming is compared, in 3D-MIMO
The wave beam of middle vertical dimension sends thinner more accurate, so as to spectrum efficiency and Traffic Channel that system is substantially improved are covered.
The important component part of 3D-MIMO system designs is the how channel information of feedback terminal, especially
The vertical dimension directional information of terminal, to enable base station to be directed at the vertical dimension direction sending signal of terminal.One
The method for planting feedback terminal vertical dimension channel information is to send many set channel information measurement reference signals
(CSI-RS) CSI-RS, is often covered through vertical dimension wave beam forming, targeted by a vertical direction.User
Measure the CSI-RS on different vertical direction, you can learn the signal strength signal intensity in corresponding vertical direction and feed back
To base station；Base station can carry out corresponding down beam shaping according to terminal feedback, as shown in Figure 1.
It should be noted that the CSI-RS0 in Fig. 1 is not a CSI-RS port, but it is a set of
CSI-RS ports, often cover CSI-RS and potentially include multiple CSI-RS ports.Such as, level dimension has eight
If antenna, then often covering CSI-RS includes eight CSI-RS ports, corresponding to the antenna number of level dimension.
In existing multi-input multi-output system (MIMO) communication mechanism, terminal can measure a set of CSI-RS
And report corresponding rank indication information (rank indicator, RI), pre-coding matrix instruction (precoding
Matrix indicator, PMI) and channel quality instruction (channel quality indicator, CQI).
In 3D-MIMO, because terminal is configured for many set CSI-RS, terminal can to cover CSI-RS direct measurement more,
And set RI/PMI/CQI more than accordingly reporting.Select most strong CQI and carry out corresponding vertical dimension wave beam tax in base station
Shape and downlink transfer.
But, report many set RI/PMI/CQI to increase the expense of uplink feedback, its expense and CSI-RS
Tricks be directly directly proportional.In order to reduce up expense, terminal can only feed back the corresponding ripples of most strong CQI
Beam index information (beam index, BI) and RI/CQI/PMI corresponding with BI.It is assumed that vertical dimension is sent out altogether
8 sets of CSI-RS are sent, then up expense fixes the BI for increasing by 3 bits, compare set more than direct feedback
RI/CQI/PMI, feedback overhead is substantially reduced.Based on above-mentioned technology, it is vertical to indicate that terminal can feed back BI
Dimension beam direction, and feed back the RI/CQI/PMI corresponding to this BI.
However, in existing system, information when RI is generally long, and CQI/PMI is then short-term information.
In periodicity is reported, the typical cycle of RI is (for example) 200 milliseconds (ms), and the allusion quotation of CQI/PMI
The type cycle is (for example) 5ms or 10ms；Wherein the value of CQI/PMI was reported according to the last time
RI calculating and report.
In 3D-MIMO, in addition to RI/CQI/PMI, in addition it is also necessary to report BI.Due to hanging down for terminal
Straight dimension mobility is typically relatively low, information when BI is generally long.Additionally, when the different CSI-RS of selection are vertical
During direction, RI/CQI/PMI needs the BI reported according to the last time to be calculated.
A kind of possible BI report methods are that BI and RI are done into combined coding, are reported in a sub- frame in.
But, because BI and RI information bit of joining together is more, the bit error rate of uplink information and up can be affected
Cover.Therefore, from for the angle for guaranteeing up covering, should by BI from RI in different sub-frame of uplink
In report.General method is the cycle and side-play amount reported for BI and RI separate configurations.
But, when giving the correct time on BI and RI are in different sub-frame of uplink, have the CQI/PMI of part may
Can be calculated according to the RI of mistake, as shown in Figure 2.After BI is reported, follow-up CQI/PMI
Can the RI that report according to the last time calculating.But, because the RI that the last time reports is before basis
BI come what is calculated, be not yet updated according to newest BI, the last time, the RI that reports was actually
Mistake, so as to cause the CQI/PMI mistake in computations between BI and RI.
The problems referred to above are likely to cause substantial amounts of CQI/PMI mistake in computations.Such as, when BI's and RI
When report cycle is 200ms, when the side-play amount of side-play amount RI for 100ms of BI is 0ms, have
The CQI/PMI of half is being calculated, so as to have a strong impact on the lower scanning frequency of system according to the RI of mistake
Rate.
The content of the invention
In order to overcome above-mentioned technical problem present in prior art, The embodiment provides a kind of anti-
The feedback method of channel condition information, device, terminal and base station, can terminal to report beam index information it
Afterwards, the rank indication information of renewal is reported immediately so that follow-up pre-coding matrix sum of ranks channel quality is indicated can
Being calculated according to the rank indication information for now updating, it is to avoid rank indication information is reported not in time and caused
Pre-coding matrix sum of ranks channel quality indicate mistake report.
According to the one side of the embodiment of the present invention, there is provided a kind of method of feeding back channel state information, bag
Include：
Receive the first report cycle of the beam index information of base station configuration；
When first report cycle is reached, to the base station beam index 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
Report rank indication information.
Wherein, in such scheme, methods described also includes：
Receive the second report cycle of the rank indication information of base station configuration；
When second report cycle is reached, to the base station rank indication information is reported.
Wherein, in such scheme, methods described also includes：
Receive base station configuration reports the first side-play amount of the beam index information, and reports the order to refer to
Show the second side-play amount of information；
Wherein, the first side-play amount BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset are
Second side-play amount, Δ t is equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=
BI_Period/N, BI_Period are first report cycle, and N and M is integer.
Wherein, in such scheme, methods described also includes：
Receive the 3rd report cycle that the pre-coding matrix sum of ranks channel quality of base station configuration is indicated；
When the 3rd report cycle is reached, report to the base station and believe described in the pre-coding matrix sum of ranks
Road quality is indicated.
Wherein, in such scheme, the pre-coding matrix sum of ranks channel quality indicates it is respectively according to positioned at institute
State the order instruction for reporting last update before the moment of pre-coding matrix sum of ranks channel quality instruction
What information determined, the rank indication information is nearest before the moment according to reporting for the rank indication information is located at
What the beam index information for once updating determined.
According to the other side of the embodiment of the present invention, a kind of method of feeding back channel state information is additionally provided,
Including：
For the first report cycle that terminal configuration reports beam index information；
When first report cycle is reached, the beam index information of the terminal to report is received；
The terminal is received adjacent with the sub-frame of uplink for reporting the beam index information each time next
The rank indication information reported on individual sub-frame of uplink.
Wherein, in such scheme, methods described also includes：
For the second report cycle that the terminal configures the rank indication information；
When second report cycle is reached, the rank indication information of the terminal to report is received.
Wherein, in such scheme, methods described also includes：
Respectively described terminal configuration reports the first side-play amount of the beam index information, and reports described
Second side-play amount of rank indication information；
Wherein, the first side-play amount BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset are
Second side-play amount, Δ t is equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=
BI_Period/N, BI_Period are first report cycle, and N and M is integer.
Wherein, in such scheme, methods described also includes：
For the 3rd report cycle that the terminal allocating pre-coding matrix sum of ranks channel quality is indicated；
When the 3rd report cycle is reached, the pre-coding matrix sum of ranks institute of the terminal to report is received
State channel quality instruction.
Wherein, in such scheme, the pre-coding matrix sum of ranks channel quality indicates it is respectively according to positioned at institute
State the order instruction for reporting last update before the moment of pre-coding matrix sum of ranks channel quality instruction
What information determined, the rank indication information is nearest before the moment according to reporting for the rank indication information is located at
What the beam index information for once updating determined.
According to the other side of the embodiment of the present invention, a kind of device of feeding back channel state information is additionally provided,
Including：
First receiver module, for receiving the first report cycle of the beam index information of base station configuration；
First reporting module, for when first report cycle is reached, to the base station ripple being reported
Beam index information；
Second reporting module, for adjacent with the sub-frame of uplink for reporting the beam index information each time
Rank indication information is reported on next sub-frame of uplink.
Wherein, in such scheme, described device also includes：
Second receiver module, for receiving the second report cycle of the rank indication information of base station configuration；
3rd reporting module, for when second report cycle is reached, to the base station order being reported
Configured information.
Wherein, in such scheme, described device also includes：
3rd receiver module, for receiving first side-play amount for reporting the beam index information of base station configuration,
And report the second side-play amount of the rank indication information；
Wherein, the first side-play amount BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset are
Second side-play amount, Δ t is equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=
BI_Period/N, BI_Period are first report cycle, and N and M is integer.
Wherein, in such scheme, described device also includes：
4th receiver module, for receiving the 3rd of the pre-coding matrix sum of ranks channel quality instruction of base station configuration the
Report cycle；
4th reporting module, for when the 3rd report cycle is reached, reporting to the base station described pre-
Channel quality described in encoder matrix sum of ranks is indicated.
Wherein, in such scheme, the pre-coding matrix sum of ranks channel quality indicates it is respectively according to positioned at institute
State the order instruction for reporting last update before the moment of pre-coding matrix sum of ranks channel quality instruction
What information determined, the rank indication information is nearest before the moment according to reporting for the rank indication information is located at
What the beam index information for once updating determined.
According to the other side of the embodiment of the present invention, a kind of device of feeding back channel state information is additionally provided,
Including：
First configuration module, for reporting the first report cycle of beam index information for terminal configuration；
5th receiver module, for when first report cycle is reached, receiving the institute of the terminal to report
State beam index information；
6th receiver module, for receive the terminal with report the beam index information each time
The rank indication information reported on the adjacent next sub-frame of uplink of row subframe.
Wherein, in such scheme, described device also includes：
Second configuration module, for configuring the second report cycle of the rank indication information for the terminal；
7th receiver module, for when second report cycle is reached, receiving the institute of the terminal to report
State rank indication information.
Wherein, in such scheme, described device also includes：
3rd configuration module, for being respectively terminal configuration the first inclined of the beam index information is reported
Shifting amount, and report the second side-play amount of the rank indication information；
Wherein, the first side-play amount BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset are
Second side-play amount, Δ t is equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=
BI_Period/N, BI_Period are first report cycle, and N and M is integer.
Wherein, in such scheme, described device also includes：
4th configuration module, for indicate for the terminal allocating pre-coding matrix sum of ranks channel quality the 3rd
Report cycle；
8th receiver module, for when the 3rd report cycle is reached, receiving the institute of the terminal to report
State channel quality described in pre-coding matrix sum of ranks to indicate.
Wherein, in such scheme, the pre-coding matrix sum of ranks channel quality indicates it is respectively according to positioned at institute
State the order instruction for reporting last update before the moment of pre-coding matrix sum of ranks channel quality instruction
What information determined, the rank indication information is nearest before the moment according to reporting for the rank indication information is located at
What the beam index information for once updating determined.
According to the other side of the embodiment of the present invention, a kind of terminal is additionally provided, including it is described above anti-
The device of feedback channel condition information.
According to the other side of the embodiment of the present invention, a kind of base station is additionally provided, including it is described above anti-
The device of feedback channel condition 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 is by receiving the ripple that base station configures
The report cycle of beam index information, beam index information is reported when report cycle is reached to base station, and every
After once reporting beam index information, rank indication information is reported in time so that in the upper of beam index information
Give the correct time carve and the time interval reported between the moment of next rank indication information in, do not exist and report precoding
The moment that rank of matrix and channel quality are indicated, thus so that follow-up pre-coding matrix sum of ranks channel quality refers to
To show can calculate according to the rank indication information of recent renewal, it is to avoid reporting not in time for rank indication information and
The mistake that the pre-coding matrix sum of ranks channel quality for causing is indicated is reported, and optimizes the downstream rate of system.
Description of the drawings
Fig. 1 is represented in prior art through the CSI-RS schematic diagrames of vertical dimension wave beam forming；
Fig. 2 represents that CQI/PMI may basis in the periodicity of channel condition information is reported in prior art
The RI of mistake is come the principle schematic that calculates；
Fig. 3 represents the method flow diagram of the feeding back channel state information of first embodiment of the invention；
Fig. 4 represents the method flow diagram of the feeding back channel state information of second embodiment of the invention；
Fig. 5 represents the structured flowchart of the device of the feeding back channel state information of third embodiment of the invention；
Fig. 6 represents the structured flowchart of the device of the feeding back channel state information of fourth embodiment of the invention；
Fig. 7 represents that the periodicity of the channel condition information of the embodiment of the present invention reports every time wave beam rope in reporting
Immediately following the principle schematic for reporting rank indication information when fuse ceases；
Fig. 8 represents the beam index information and rank indication information of the embodiment of the present invention respectively according to respective week
The principle schematic that phase and side-play amount are reported.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing in accompanying drawing
The exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure and should not be by
Embodiments set forth here is limited.On the contrary, there is provided these embodiments are able to be best understood from this
It is open, and can by the scope of the present disclosure it is complete convey to those skilled in the art.
First embodiment
According to the one side of the embodiment of the present invention, there is provided a kind of method of feeding back channel state information, should
For terminal, the method, first, the first report cycle of the beam index information of base station configuration is received；Connect
, when first report cycle is reached, to the base station beam index information is reported；Finally,
Report on the next sub-frame of uplink adjacent with the sub-frame of uplink of the beam index information is reported each time
Rank indication information.Therefore, the method for the feeding back channel state information of the embodiment of the present invention, effectively prevent pre-
The mistake that encoder matrix sum of ranks channel quality is indicated reports the harmful effect to system descending speed.
As shown in figure 3, the method includes：
Step S31, the first report cycle for receiving the beam index information that base station configures.
The method of the feeding back channel state information of the embodiment of the present invention, is applied to terminal.Wherein, exist
In 3D-MIMO systems, terminal is needed to base station feedback channel condition information, and the channel condition information includes：
Beam index information, rank indication information, pre-coding matrix sum of ranks channel quality are indicated.Wherein, beam index
Information needs rank indication information, the precoding which set CSI-RS port is reported to base station for instruction terminal
Rank of matrix and channel quality are indicated, and rank indication information is according to reporting positioned at the rank indication information
What the beam index information of last update before the moment determined, pre-coding matrix sum of ranks channel quality
Indicate it is respectively nearest before the moment according to reporting for pre-coding matrix sum of ranks channel quality instruction is located at
What the rank indication information for once updating determined.
Step S33, when first report cycle is reached, report the beam index to believe to the base station
Breath.
When terminal is to base station reporting status information of channel, terminal can be in the channel shape for receiving base station transmission
During state information request instruction, corresponding channel condition information is reported to base station, naturally it is also possible to match somebody with somebody according to base station
The report cycle put is carrying out periodically reporting.In the method for the feeding back channel state information of the embodiment of the present invention
In, beam index information using periodicity report by the way of, whenever the first report cycle of beam index information
During arrival, terminal just reports a wave beam index information to base station.
Certainly, for the other information that channel condition information includes, such as pre-coding matrix sum of ranks channel quality
Indicate, equally can be so that by the way of periodic report, then terminal needs the pre-coding matrix for receiving base station configuration
The 3rd report cycle that sum of ranks channel quality is indicated, and when the 3rd report cycle is reached, to the base
Station reports channel quality described in the pre-coding matrix sum of ranks to indicate.
Step S35, on the next one adjacent with the sub-frame of uplink of the beam index information is reported each time
Rank indication information is reported in row subframe.
It is, terminal reports primary wave when the first report cycle of beam index information is reached to base station
Beam index information, and report on the next sub-frame of uplink of the sub-frame of uplink of beam index information actively at this
A rank indication information is reported to base station, as shown in Figure 7.Therefore the fed-back channel status of the embodiment of the present invention
The method of information, behind each the beam index information reported to base station, all immediately following one it is newest more
New rank indication information so that follow-up pre-coding matrix sum of ranks channel quality is indicated can be according to now updating
Rank indication information calculating, it is to avoid reporting not in time for rank indication information and the pre-coding matrix order that causes
The mistake indicated with channel quality is reported.
Certainly, for rank indication information, reported also dependent on the corresponding report cycle of base station configuration,
That is, terminal can receive the second report cycle of the rank indication information of base station configuration, and on described second
When the report cycle reaches, to the base station rank indication information is reported.It is, terminal with report ripple
The sub-frame of uplink of beam index information close to next sub-frame of uplink on report after rank indication information time in,
Terminal can also be reported according to the report cycle of rank indication information oneself.
On the other hand, when beam index information and rank indication information are performed both by periodic report, can also pass through
First report cycle and the first side-play amount of beam index information are set, and the second of rank indication information reports
Cycle and the second side-play amount are causing terminal to report ripple to base station according to the first report cycle and the first side-play amount
Beam index information, rank indication information is reported according to second round and the second side-play amount to base station, so that
In the time interval reported between the moment for reporting moment and next rank indication information of beam index information,
There is no the moment for reporting pre-coding matrix sum of ranks channel quality to indicate.
In particular it is required that arranging the first side-play amount of beam index information
Wherein, RI_offset is the second side-play amount to BI_offset=M*RI_Period+RI_offset- Δs t, and Δ t is equal to 1
Millisecond, RI_Period is second report cycle；And the first report cycle of setting
BI_Period=N*RI_Period, N and M are integer.
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 according to BI_Period and BI_offset to base station, according to
RI_Period and RI_offset to base station report rank indication information when, can be as shown in figure 8, in each BI
A RI has all been closelyed follow below, for example, a BI has been reported in 74ms, so reporting in 75ms
One RI, because the duration of each BI and RI is 1ms, so the BI reported in 74ms
And the RI reported during 75ms between, terminal can not possibly report pre-coding matrix sum of ranks channel quality to base station
Indicate, therefore, it is to avoid pre-coding matrix sum of ranks channel quality is indicated according to the order instruction letter not upgraded in time
Breath is calculated, so as to the mistake for causing pre-coding matrix sum of ranks channel quality to indicate is reported.
Second embodiment
According to the other side of the embodiment of the present invention, a kind of method of feeding back channel state information is additionally provided,
Base station is applied to, the method is that terminal configures the first report cycle for reporting beam index information first；
Then, when first report cycle is reached, the beam index information of the terminal to report is received；
Finally, the terminal is received adjacent with the sub-frame of uplink for reporting the beam index information each time next
The rank indication information reported on individual sub-frame of uplink.Therefore, the feeding back channel state information of the embodiment of the present invention
Method, it is to avoid reporting not in time for rank indication information and the pre-coding matrix sum of ranks channel quality that causes is indicated
Mistake report, optimize the downstream rate of system.
As shown in figure 4, the method includes：
Step S41, the first report cycle for reporting beam index information 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, exist
In 3D-MIMO systems, base station needs receiving terminal feeding back channel state information, and is believed according to channel status
Breath carries out corresponding down beam shaping.
The channel condition information includes：Beam index information, rank indication information, pre-coding matrix sum of ranks channel
Quality is indicated.Wherein, beam index information needs which set CSI-RS reported to base station for instruction terminal
The rank indication information of port, pre-coding matrix order and channel quality are indicated, and rank indication information is basis
The beam index information of last update before the moment that reports positioned at the rank indication information determines
, pre-coding matrix sum of ranks channel quality indicates it is respectively according to positioned at the pre-coding matrix sum of ranks channel matter
Amount instruction reports what the rank indication information of last update before the moment determined.
Step S43, when first report cycle is reached, receive the wave beam rope of the terminal to report
Fuse ceases.
During the channel condition information of base station receiving terminal feedback, base station can be by sending channel status letter to terminal
The mode of breath demand signalling, actively to terminal request channel condition information, or, base station can configure for terminal
The corresponding reporting source of channel state information cycle so that terminal can be when report cycle be reached, actively on base station
Report corresponding channel condition information.
Wherein, base station can report after the first report cycle that beam index information is configured for terminal first
When cycle reaches, the beam index information that receiving terminal is reported；For terminal configuration codes rank of matrix and channel
After the 3rd report cycle that quality is indicated, when the 3rd report cycle is reached, the coding square that receiving terminal is reported
Battle array sum of ranks channel quality is indicated.
Step S45, receive the terminal with the sub-frame of uplink phase for reporting the beam index information each time
The rank indication information reported on adjacent next sub-frame of uplink
Base station reports each time in terminal and is connect on the next sub-frame of uplink of the sub-frame of uplink of beam index information
Receive a rank indication information so that behind each beam index information that base station receives, all immediately following one
The rank indication information of latest update, and then so that follow-up pre-coding matrix sum of ranks channel quality instruction can be with root
The rank indication information updated when accordingly to be calculating, it is to avoid reporting not in time for rank indication information and cause it is pre-
The mistake that encoder matrix sum of ranks channel quality is indicated is reported.
In addition, for rank indication information, base station is alternatively on rank indication information configuration report cycle, i.e., second
The report cycle, and when the second report cycle is reached, the rank indication information that receiving terminal is reported.It is, base
Stand from report the sub-frame of uplink of beam index information close to next sub-frame of uplink on receive order instruction letter
After breath, base station terminal can also carry out periodic receipt end according to the second report cycle configured for rank indication information
The rank indication information that end reports.
On the other hand, when base station configures beam index information and rank indication information is performed both by periodic report,
The first report cycle and first side-play amount that beam index information is set, and rank indication information can also be passed through
Second report cycle and the second side-play amount are causing terminal according to the first report cycle and the first side-play amount to base
Station reports beam index information, and rank indication information is reported to base station according to second round and the second side-play amount, from
And (beam index information connects between the adjacent beams index information and rank indication information for receiving to cause base station
Time receiving was carved before the time of reception of rank indication information), do not receive pre-coding matrix sum of ranks channel quality
Indicate.
In particular it is required that arranging the first side-play amount of beam index information
Wherein, RI_offset is the second side-play amount to BI_offset=M*RI_Period+RI_offset- Δs t, and Δ t is equal to 1
Millisecond, RI_Period is second report cycle；And the first report cycle of setting
BI_Period=N*RI_Period, N and M are integer.
Therefore, the method for the feeding back channel state information of the embodiment of the present invention, can in terminal beam index
After information, the rank indication information of renewal is reported immediately so that follow-up pre-coding matrix sum of ranks channel quality
Instruction can be calculated according to the rank indication information for now updating, it is to avoid reporting not in time for rank indication information
And the mistake that the pre-coding matrix sum of ranks channel quality for causing is indicated is reported.
3rd embodiment
According to the other side of the embodiment of the present invention, a kind of device of feeding back channel state information is additionally provided,
Terminal is applied to, as shown in figure 5, this is applied to the device 500 of the feeding back channel state information of terminal, bag
Include：
First receiver module 501, for receiving the first report cycle of the beam index information of base station configuration；
First reporting module 502, for when first report cycle is reached, to the base station institute being reported
State beam index information；
Second reporting module 503, for the sub-frame of uplink phase for reporting the beam index information each time
Rank indication information is reported on adjacent next sub-frame of uplink.
Alternatively, described device also includes：
Second receiver module 504, for receiving the second report cycle of the rank indication information of base station configuration；
3rd reporting module 505, for when second report cycle is reached, to the base station institute being reported
State rank indication information.
Alternatively, described device also includes：
3rd receiver module 506, for receive base station configuration the first inclined of the beam index information is reported
Shifting amount, and report the second side-play amount of the rank indication information；
Wherein, the first side-play amount BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset are
Second side-play amount, Δ t is equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=
BI_Period/N, BI_Period are first report cycle, and N and M is integer.
Alternatively, described device also includes：
4th receiver module 507, what the pre-coding matrix sum of ranks channel quality for receiving base station configuration was indicated
3rd report cycle；
4th reporting module 508, for when the 3rd report cycle is reached, to the base station institute being reported
State channel quality described in pre-coding matrix sum of ranks to indicate.
Alternatively, the pre-coding matrix sum of ranks channel quality indicates it is respectively according to positioned at the precoding square
What battle array sum of ranks channel quality was indicated reports what the rank indication information of last update before the moment 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.
Fourth embodiment
According to the other side of the embodiment of the present invention, a kind of device of feeding back channel state information is additionally provided,
Base station is applied to, as shown in fig. 6, this is applied to the device 600 of the feeding back channel state information of base station, bag
Include：
First configuration module 601, for reporting the first report cycle of beam index information for terminal configuration；
5th receiver module 602, for when first report cycle is reached, receiving the terminal to report
The beam index information；
6th receiver module 603, for receive the terminal with report the beam index information each time
The adjacent next sub-frame of uplink of sub-frame of uplink on the rank indication information that reports
Alternatively, described device also includes：
Second configuration module 604, for configuring the second report cycle of the rank indication information for the terminal；
7th receiver module 605, for when second report cycle is reached, receiving the terminal to report
The rank indication information.
Alternatively, described device also includes：
3rd configuration module 606, for being respectively terminal configuration reports the beam index information the
One side-play amount, and report the second side-play amount of the rank indication information；
Wherein, the first side-play amount BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset are
Second side-play amount, Δ t is equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=
BI_Period/N, BI_Period are first report cycle, and N and M is integer.
Alternatively, described device also includes：
4th configuration module 607, for what is indicated for the terminal allocating pre-coding matrix sum of ranks channel quality
3rd report cycle；
8th receiver module 608, for when the 3rd report cycle is reached, receiving the terminal to report
The pre-coding matrix sum of ranks described in channel quality indicate.
Alternatively, the pre-coding matrix sum of ranks channel quality indicates it is respectively according to positioned at the precoding square
What battle array sum of ranks channel quality was indicated reports what the rank indication information of last update before the moment 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.
5th embodiment
According to the other side of the embodiment of the present invention, a kind of terminal is additionally provided, including above-mentioned be applied to end
The device of the feeding back channel state information at end.
Sixth embodiment
According to the other side of the embodiment of the present invention, a kind of base station is additionally provided, including above-mentioned be applied to base
The device of the feeding back channel state information stood.
Above-described is the preferred embodiment of the present invention, it should be pointed out that for the ordinary people of the art
For member, some improvements and modifications can also be made under the premise of without departing from principle of the present invention, these
Improvements and modifications are also within the scope of the present invention.
Claims (14)
1. a kind of method of feeding back channel state information, it is characterised in that include：
Receive the first report cycle of the beam index information of base station configuration；
When first report cycle is reached, to the base station beam index 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
Report rank indication information.
2. the method for claim 1, it is characterised in that methods described also includes：
Receive the second report cycle of the rank indication information of base station configuration；
When second report cycle is reached, to the base station rank indication information is reported.
3. method as claimed in claim 2, it is characterised in that methods described also includes：
Receive base station configuration reports the first side-play amount of the beam index information, and reports the order to refer to
Show the second side-play amount of information；
Wherein, the first side-play amount BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset are
Second side-play amount, Δ t is equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=
BI_Period/N, BI_Period are first report cycle, and N and M is integer.
4. the method for claim 1, it is characterised in that methods described also includes：
Receive the 3rd report cycle that the pre-coding matrix sum of ranks channel quality of base station configuration is indicated；
When the 3rd report cycle is reached, report to the base station and believe described in the pre-coding matrix sum of ranks
Road quality is indicated.
5. method as claimed in claim 4, it is characterised in that the pre-coding matrix sum of ranks channel quality
Indicate it is respectively nearest before the moment according to reporting for pre-coding matrix sum of ranks channel quality instruction is located at
What the rank indication information for once updating determined, the rank indication information is according to positioned at order instruction letter
Breath reports what the beam index information of last update before the moment determined.
6. a kind of method of feeding back channel state information, it is characterised in that include：
For the first report cycle that terminal configuration reports beam index information；
When first report cycle is reached, the beam index information of the terminal to report is received；
The terminal is received adjacent with the sub-frame of uplink for reporting the beam index information each time next
The rank indication information reported on individual sub-frame of uplink.
7. method as claimed in claim 6, it is characterised in that methods described also includes：
For the second report cycle that the terminal configures the rank indication information；
When second report cycle is reached, the rank indication information of the terminal to report is received.
8. method as claimed in claim 7, it is characterised in that methods described also includes：
Respectively described terminal configuration reports the first side-play amount of the beam index information, and reports described
Second side-play amount of rank indication information；
Wherein, the first side-play amount BI_offset=M*RI_Period+RI_offset- Δ t, RI_offset are
Second side-play amount, Δ t is equal to 1 millisecond, and RI_Period is second report cycle, and RI_Period=
BI_Period/N, BI_Period are first report cycle, and N and M is integer.
9. method as claimed in claim 6, it is characterised in that methods described also includes：
For the 3rd report cycle that the terminal allocating pre-coding matrix sum of ranks channel quality is indicated；
When the 3rd report cycle is reached, the pre-coding matrix sum of ranks institute of the terminal to report is received
State channel quality instruction.
10. method as claimed in claim 9, it is characterised in that the pre-coding matrix sum of ranks channel matter
Amount instruction is reported before the moment most according to what is indicated positioned at the pre-coding matrix sum of ranks channel quality
What the nearly rank indication information for once updating determined, the rank indication information is according to positioned at the order instruction
Information reports what the beam index information of last update before the moment determined.
11. a kind of devices of feeding back channel state information, it is characterised in that include：
First receiver module, for receiving the first report cycle of the beam index information of base station configuration；
First reporting module, for when first report cycle is reached, to the base station ripple being reported
Beam index information；
Second reporting module, for adjacent with the sub-frame of uplink for reporting the beam index information each time
Rank indication information is reported on next sub-frame of uplink.
12. a kind of devices of feeding back channel state information, it is characterised in that include：
First configuration module, for reporting the first report cycle of beam index information for terminal configuration；
5th receiver module, for when first report cycle is reached, receiving the institute of the terminal to report
State beam index information；
6th receiver module, for receive the terminal with report the beam index information each time
The rank indication information reported on the adjacent next sub-frame of uplink of row subframe.
13. a kind of terminals, it is characterised in that including feeding back channel state information as claimed in claim 11
Device.
14. a kind of base stations, it is characterised in that including feeding back channel state information as claimed in claim 12
Device.
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| US20090238256A1 (en) * | 2008-03-24 | 2009-09-24 | Texas Instruments Incorporated | Cqi feedback structure |
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| 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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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090238256A1 (en) * | 2008-03-24 | 2009-09-24 | Texas Instruments Incorporated | Cqi feedback structure |
| 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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