CN105099532B - A method of selection aperiodic channel status information reports mode - Google Patents
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Abstract
A method of selection aperiodic channel status information reports mode, which comprises according to the relationship between aperiodic channel status information CSI and the transmission mode of data, 9 kinds of transmission modes are divided into first group, second group and third group；According to the transmission mode of user configuration, select to be grouped belonging to user in first group, second group and third group；By the current transmission environment of user and the scheduling mode used, determine that aperiodic CSI reports mode in the grouping of affiliated transmission mode.After the embodiment of the present invention, with the difference of application scenarios, corresponding aperiodic CSI is selected to report mode, guarantee accurately reflects channel status corresponding to application scenarios.
Description
Technical field
This application involves fields of communication technology, report mould more particularly, to a kind of selection aperiodic channel status information
The method of formula.
Background technique
In third generation partner program long evolving system (3GPP LTE), user (UE) equipment is according to descending reference
The channel state information (CSI) of signal acquisition down channel.Then, by the CSI feedback of acquisition to base station.It is fed back according to UE base station
CSI, determine the modulation coding scheme and physical resource position and transmission mode of the data for being sent to UE.In LTE system,
CSI includes three kinds of forms: channel quality indicates (CQI), pre-coding matrix instruction (PMI), order instruction (RI).
It supports the CSI of two kinds of forms to report in LTE system: periodically reporting and reported with aperiodicity.It is wherein aperiodic
CSI is reported to be completed by Physical Uplink Shared Channel (PUSCH).It includes 5 kinds that aperiodic CSI, which reports mode mainly, such as one institute of table
Show.
Table one
PUSCH X1-X2:X1 represents the reporting types of CQI, is wideband CQI (broadband CQI) respectively,
UESelected CQI (UE selects CQI) and Higher Layer-configured (high level configuration CQI)；X2 represents the upper of PMI
Report type, including No PMI (no PMI), Single PMI (single PMI) and Multiple PMI (more PMI).High level configuration CQI
Refer to that high level divides subband by parameter, UE reports all divided subband CQI.Terminal selection CQI refers to that terminal can basis
The best subband CQI of channel condition uploaded state.
Every kind of aperiodic CSI is reported reports content to be described as follows under mode:
The broadband Mode1-2 CQI, reporting content includes: 2 broadband CQI, the PMI of each subband.It is needle that these, which report content,
For each code word, subband size is related with system bandwidth.
Mode3-0 high level configuration CQI (No PMI): UE is only that first CodeWord reports broadband CQI and each
The CQI of subband.It does not include PMI that this mode, which reports content, i.e., downlink data is without codebook-based precoding, so corresponding
Transmission mode includes single antenna transmissions, transmission diversity and greatly delay CDD.
Mode3-1 high level configuration CQI (Single PMI): UE is that each CodeWord reports a broadband CQI, one
The CQI of PMI and each subband.Mode is reported to assume that all subbands use identical PMI from reporting content to can be seen that this, i.e.,
The each subband data of downlink is handled based on identical code book.
Mode2-0UE selects CQI (No PMI): identical as PUSCH3-0, which reports content only to reflect first code
The channel status of word.Reporting content is broadband CQI, selected M subband it is corresponding CQI and selected M it is preferably sub
The position of band.Due to reporting content not include PMI, corresponding transmission mode includes single antenna transmissions, transmission diversity and big
Postpone CDD.
Mode2-2UE selects CQI (Multiple PMI): reporting content for broadband CQI, selected M subband is corresponding
CQI, the corresponding PMI in broadband and M subband corresponding PMI and selected M best subbands position.
Aperiodic CSI reports the transmission mode of mode and data also to have certain relationship, specific as follows shown:
TM1:Modes2-0, Modes3-0.
TM2:Modes2-0, Modes3-0.
TM3:Modes2-0, Modes3-0.
TM4:Modes1-2, Modes2-2, Modes3-1.
TM5:Mode3-1。
TM6:Modes1-2, Modes2-2, Modes3-1.
TM7:Modes2-0, Modes3-0.
TM8: being configured with the UE range of choice that PMI/RI is reported is Modes1-2, Modes2-2, Modes3-1；Do not configure
The UE range of choice that PMI/RI is reported is Modes2-0, Modes3-0.
TM9: be configured with PMI/RI report and CSI-RI port number greater than 1 UE range of choice be Modes1-2, Modes2-
2, Modes3-1, do not configure PMI/RI report or CSI-RI port number equal to 1 UE range of choice be Modes2-0,
Modes3-0。
Although can be seen that transmission mode from above-mentioned protocol contents and aperiodic CSI reported certain pass between mode
System, but be not one-to-one, and agreement only defines aperiodic CSI and reports mode and its report content.It is not clear its
The application scenarios being more suitable for.Therefore in practical applications, for different application scenarios, if aperiodic CSI reports mode to select
That selects is not applicable, it is impossible to accurately reflect channel status corresponding to current application scene.
Summary of the invention
The embodiment of the present invention proposes a kind of method that selection aperiodic channel status information reports mode, with transmission mould
Formula, application scenarios, use scheduling mode difference, select corresponding aperiodic CSI to report mode, guarantee accurately reflects applied field
Subscriber channel state corresponding to scape.
The technical solution of the embodiment of the present invention is as follows:
A method of selection aperiodic channel status information reports mode, which comprises
The relationship between mode and the transmission mode of data is reported according to aperiodic channel status information CSI, 9 kinds are transmitted
Mode is divided into first group, second group and third group；
The transmission mode current according to user, determines the affiliated transmission mode of user in first group, second group and third group
Grouping；
Determine that aperiodic CSI reports mode in the grouping of affiliated transmission mode.
9 kinds of transmission modes are divided by the relationship reported between mode and the transmission mode of data according to aperiodic CSI
First group, second group and third group include:
The relationship between mode and the transmission mode of data is reported according to aperiodic CSI,
By TM1, TM2, the TM8, the no configuration PMI/RI that are reported without allocating pre-coding matrix instruction PMI/ order instruction RI
It reports or channel status indicates TM9, TM3 and the TM7 of reference signal CSI-RS port number equal to 1, is divided into first group；
It is second group by TM5 points；
Will configure PMI/RI report TM8, configuration PMI/RI report and CSI-RS port number be greater than 1 TM9, TM4 and TM6
It is divided into third group.
It is described to determine that aperiodic CSI reports the mode to include: in the grouping of affiliated transmission mode
By the current transmission environment of user, determine that aperiodic CSI reports mode in the grouping of affiliated transmission mode.
The transmission environment current by user determines that aperiodic CSI reports mode packet in the grouping of affiliated transmission mode
It includes:
The affiliated transmission mode of user is first group, and is center user, determines that aperiodic CSI reports mode in the first set
It is Modes2-0.
The affiliated transmission mode of user is first group, and is edge customer, determines that aperiodic CSI reports mode in the first set
It is Modes3-0.
The transmission environment current by user determines that aperiodic CSI reports mode packet in the grouping of affiliated transmission mode
It includes:
The affiliated transmission mode of user is third group, and current transmission environment is rural area or the dispatching party using the choosing of non-frequency
Formula, determining that aperiodic CSI reports mode in third group is Modes1-2.
The affiliated transmission mode of user be third group, and currently employed frequency choosing scheduling mode and transmission environment be isolate it is small
Area, determining that aperiodic CSI reports mode in third group is Modes2-2；
The affiliated transmission mode of user be third group, and currently employed frequency choosing scheduling mode and transmission environment be common macro station
Scene, determining that aperiodic CSI reports mode in third group is Modes3-1.
Determine that aperiodic CSI reports the mode to include: in the grouping of affiliated transmission mode
When the affiliated transmission mode of user is second group, then it is Modes3-1 that aperiodic CSI, which reports mode,.
The method further includes: determine that transmission mode switching occurs for the transmission mode of data, according to data after switching
Transmission mode user's affiliated transmission mode grouping is determined in first group, second group and third group, in conjunction with the current biography of user
The scheduling mode of defeated environment and use determines that aperiodic CSI reports mode in the grouping of affiliated transmission mode.
As can be seen that reporting mode and data according to aperiodic CSI in embodiments of the present invention from above-mentioned technical proposal
Transmission mode between relationship, 9 kinds of transmission modes are divided into first group, second group and third group；Then current according to user
Transmission mode, the scheduling mode of use and the transmission environment of active user determine that aperiodic CSI is reported in affiliated grouping
Mode.As it can be seen that aperiodic CSI reports the determination of mode to consider not only the transmission modes of data, the scheduling mode of use is also examined
Consider the current transmission environment of user, therefore channel status corresponding to application scenarios can be accurately reflected.
Detailed description of the invention
Fig. 1 is the method flow schematic diagram for selecting aperiodic channel status information to report mode；
Fig. 2 is the embodiment flow diagram that aperiodic channel status information reports model selection and switching.
Specific embodiment
To make the object, technical solutions and advantages of the present invention express to be more clearly understood, with reference to the accompanying drawing and specifically
The present invention is further described in more detail for embodiment.
In embodiments of the present invention, aperiodic CSI reports the determination of mode to consider not only the transmission mode of data, use
Scheduling mode, it is also contemplated that the current transmission environment of user, thus can accurately reflect user corresponding to application scenarios letter
Road state.
Scheduling mode is divided into frequency selection scheduling and non-frequency selection scheduling.It is biggish in frequency domain fluctuation that frequency selection scheduling is applied to signal
It is the scheduling mode for selecting the preferable time/frequency source block of quality to distribute to scheduled UE under environment；Non- frequency selection scheduling, as broadband
Scheduling mode is the scheduling mode for not distinguishing running time-frequency resource channel quality.
Data transmission environments divide from the channel quality that data are transmitted, can be divided into central user and edge customer；From number
For the complexity of transmission environment, it is divided into city and rural area.Each aperiodic CSI reports mode to have oneself most suitable
Environment is adapted to, the technical solution in attached drawing 1 specifically can be used and determine that aperiodic CSI reports mode.
101, the relationship between mode and the transmission mode of data is reported according to aperiodic CSI, 9 kinds of transmission modes is divided into
First group, second group and third group.
Each activation user requires the information such as movement speed according to its transmission environment, user, it is first determined it is transmitted
Mode, and it is allocated to UE, so that UE can just be properly received data.Therefore, when selecting aperiodic CSI to report mode, root first
The relationship between mode and the transmission mode of data is reported according to aperiodic CSI existing in agreement, can will be transmitted in support at present 9
Mode is divided into 3 groups, is respectively as follows:
First group: TM1, TM2, TM3, TM7, report without the TM8 that reports of configuration PMI/RI and without configuration PMI/RI or
CSI-RS port number is equal to 1 TM9.It is Modes2-0 and Modes3-0 that corresponding aperiodic CSI, which reports mode,.
Second group: TM5, it uniquely corresponds to aperiodic CSI and reports mode Modes3-1
Third group: the TM8 and configuration PMI/RI that TM4, TM6, configuration PMI/RI are reported are reported and CSI-RS port number is greater than 1
TM9, corresponding aperiodic CSI reports mode Modes1-2, Modes2-2 and Modes3-1.
102, the transmission mode current according to user is determined in first group, second group and third group and is transmitted belonging to user
Mode packet.
Since transmission mode grouping is carried out according to transmission mode, the transmission mode current according to user
Determine the affiliated transmission mode grouping of user.
103, the transmission environment current by user determines that aperiodic CSI reports mode in the grouping of affiliated transmission mode.
Mode is reported due to being corresponding with multiple aperiodic CSI in the grouping of each transmission mode, can be worked as according to user
The scheduling mode of preceding transmission environment and use further determines that aperiodic CSI reports mode in transmission mode grouping.
Interior user is grouped first for the transmission mode of configuration:
It includes Modes2-0 and Modes3-0 that selectable aperiodic CSI, which reports mode, and it is anti-that both modes do not need PMI
Feedback.Wherein, Modes2-0 reports a subband CQI to each code word of M subband selected, and adjacent area interference cannot be distinguished, be suitble to
In central user；Mode3-0UE feeds back the CQI of each subband, it is to be understood that the difference of each sub-band channel is used more suitable for edge
Family.
Interior user is grouped in third for the transmission mode of configuration:
Selectable aperiodic CSI mode is Modes1-2, Modes2-2 and Modes3-1.
Modes1-2 is the configuration of broadband CSI feedback, therefore, it is more single to be mainly used in the environment such as non-frequency choosing or rural area
One scene and the scene of large-data operation transmission demand；
Modes2-2 only reports a subband CQI to each code word of M subband selected, that is to say, that the M selected
Subband does not do the differentiation in channel quality superiority and inferiority, if for multiple cell covering scene, because adjacent area will necessarily be to certain frequency bands
It interferes, it therefore, must similar to Modes2-2 in this way, not distinguishing the reporting schemes for reporting a subband CQI of frequency band superiority and inferiority
It so will affect scheduling performance；It is therefore proposed that Modes2-2 is for isolated cell, such as hot spot covering.
Mode3-1, UE feed back the CQI of each subband, it is to be understood that the difference of each sub-band channel, Mode3-1 is for how small
Area's covering scene.
Based on above-mentioned analysis, the application scenarios of mode can be reported to distinguish aperiodic CSI, two institute of table specific as follows
Show:
Table two
Aperiodic CSI reports mode to consider not only the scheduling mode of the transmission mode of data, use, it is contemplated that with
Transmission environment locating for family.
Mode application scenarios are reported in conjunction with transmission mode and aperiodic CSI, aperiodic CSI mode is as follows:
A: the transmission mode of user configuration belongs to first group:
If user is central user, aperiodic CSI mode is Modes2-0.
If user is edge customer, aperiodic CSI mode is Modes3-0.
If transmission mode switching occurs for user, and the transmission mode newly configured is also in first group, as long as subscriber channel
There is no the variations of matter for quality, will not trigger the update that aperiodic CSI reports mode；If user channel quality has occurred
The variation of matter will occur aperiodic CSI and report schema update.Wherein, the variation of channel quality matter refers to updates from central user
For edge customer；Or central user is updated to from edge customer.
B: the transmission mode of user configuration belongs to second group:
TM5 is fixed to report Modes3-1 using aperiodic CSI, and when transmission mode is switched to TM5, aperiodic CSI reports mould
Formula will update Modes3-1.
C: the transmission mode of user configuration belongs to third group:
Modes1-2 is selected for non-frequency or the environment of the relatively simple spaciousnesses of environment such as rural area.
Modes2-2 is selected for frequency but isolated cell, as hot spot covers.
Mode3-1 is selected for frequency and multiple cell covering scene.
In addition, when the transmission mode of user configuration switches, according to the transmission mode that user after switching newly configures, the
One group, second group or with determine user currently in third group belonging to transmission mode grouping, in conjunction with the current transmission environment of user and
The scheduling mode of use determines that aperiodic CSI reports mode in the grouping of affiliated transmission mode.
It is the embodiment flow diagram of the model selection of non-periodic channel state information report and switching referring to attached drawing 2, tool
Body the following steps are included:
201, judge whether user channel quality occurs the variation of matter, during user can be divided by the channel quality according to user
Heart user and edge customer.If the variation of matter occurs for the channel quality of user, 202 are executed；If the channel quality of user does not have
The variation that matter occurs, then execute 203.
User's property changes, i.e., user channel quality occur matter variation, in particular to, central user is changed to
Edge customer or edge customer are changed to central user.
202, when transmission mode is at first group, then 207 are executed；When transmission mode is not belonging to first group, then 203 are executed.
203, judge whether user's scene changes, user's scene includes the isolated cell environments such as rural area, hot spot covering
With common macro base station scene.If user's scene changes, 204 are executed；If user's scene is executed there is no variation
205。
204, when transmission mode is in third group, then 209 are executed；When transmission mode is not belonging to third group, then 205 are executed.
205, when transmission mode switching occurs, then 206 are executed；There is no transmission mode switchings, then this process terminates.
206, the transmission mode current based on user determines that transmission mode is grouped.If it is determined that being first group, then 207 are executed；
If it is determined that being second group, then 208 are executed；If it is determined that being third group, then 209 are executed.
207, central user, it is Modes2-0 that aperiodic CSI, which reports mode,；Edge customer, aperiodic CSI report the mode to be
Modes3-0 is transferred to 210.
208, it is Modes3-1 that aperiodic CSI, which reports mode, is transferred to 210.
209, for the environment of the choosing of non-frequency or the relatively simple spaciousness of environment such as rural area, aperiodic CSI reports the mode to be
Modes1-2；The cell selected but isolated for frequency, if hot spot covers, it is Modes2-2 that aperiodic CSI, which reports mode,；Frequency is selected
And multiple cell covering scene, it is Mode3-1 that aperiodic CSI, which reports mode,；It is finished, is transferred to 210.
210, mode is reported to report mode whether consistent with newest aperiodic CSI based on previous aperiodic CSI, if
Changed, executes 211, otherwise terminate.
211, it triggers aperiodic CSI and reports pattern switching.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (2)
1. a kind of method that selection aperiodic channel status information (CSI) reports mode, which is characterized in that the described method includes:
Report the relationship between mode and the transmission mode of data according to aperiodic CSI, by 9 kinds of transmission modes be divided into first group,
Second group and third group；The transmission mode includes: TM1, TM2, TM3, TM4, TM5, TM6, TM7, TM8, TM9；
The transmission mode current according to user determines the affiliated transmission mode grouping of user in first group, second group and third group；
Determine that aperiodic CSI reports mode in the grouping of affiliated transmission mode；
Wherein, the relationship reported according to aperiodic CSI between mode and the transmission mode of data, by 9 kinds of transmission modes point
It is first group, second group and third group includes:
The relationship between mode and the transmission mode of data is reported according to aperiodic CSI,
It is reported by TM1, TM2, without TM8, no configuration PMI/RI that allocating pre-coding matrix instruction PMI/ order instruction RI is reported
Or channel status indicates TM9, TM3 and the TM7 of reference signal CSI-RS port number equal to 1, is divided into first group；
It is second group by TM5 points；
It will configure that TM8, the configuration PMI/RI that PMI/RI is reported are reported and TM9, TM4 and the TM6 of CSI-RS port number greater than 1 point are
Third group；
It is described to determine that aperiodic CSI reports the mode to include: in the grouping of affiliated transmission mode
By the current transmission environment of user, determine that aperiodic CSI reports mode in the grouping of affiliated transmission mode；
Wherein, the transmission environment current by user determines that aperiodic CSI reports mode packet in the grouping of affiliated transmission mode
It includes:
The affiliated transmission mode of user is first group, and is center user, determines that aperiodic CSI reports the mode to be in the first set
Modes2-0；
The affiliated transmission mode of user is first group, and is edge customer, determines that aperiodic CSI reports the mode to be in the first set
Modes3-0；
The affiliated transmission mode of user is third group, and current transmission environment is the scheduling mode in rural area or use non-frequency choosing,
Determining that aperiodic CSI reports mode in third group is Modes1-2；
The affiliated transmission mode of user is third group, and the scheduling mode of currently employed frequency choosing and transmission environment are isolated cells,
Determining that aperiodic CSI reports mode in third group is Modes2-2；
The affiliated transmission mode of user be third group, and currently employed frequency choosing scheduling mode and transmission environment be common macro station field
Scape, determining that aperiodic CSI reports mode in third group is Modes3-1；
When the affiliated transmission mode of user is second group, then it is Modes3-1 that aperiodic CSI, which reports mode,.
2. the method that selection aperiodic channel status information reports mode according to claim 1, which is characterized in that the side
Method further comprises: determining that transmission mode switching occurs for the transmission mode of data, according to the transmission mode of data after switching the
The affiliated transmission mode grouping of user is determined in one group, second group and third group, in conjunction with the current transmission environment of user and use
Scheduling mode determines that aperiodic CSI reports mode in the grouping of affiliated transmission mode.
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| CN101867447A (en) * | 2010-04-30 | 2010-10-20 | 中兴通讯股份有限公司 | Feedback method of channel state information and terminal |
| CN102082636A (en) * | 2010-08-16 | 2011-06-01 | 大唐移动通信设备有限公司 | Method, base station and system for indicating channel state information CSI feedback |
| CN102413523A (en) * | 2011-12-09 | 2012-04-11 | 东南大学 | Multi-user downlink transmission mode switching method in multi-input multi-output communication system |
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| US7564814B2 (en) * | 2004-05-07 | 2009-07-21 | Qualcomm, Incorporated | Transmission mode and rate selection for a wireless communication system |
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| CN101867447A (en) * | 2010-04-30 | 2010-10-20 | 中兴通讯股份有限公司 | Feedback method of channel state information and terminal |
| CN102082636A (en) * | 2010-08-16 | 2011-06-01 | 大唐移动通信设备有限公司 | Method, base station and system for indicating channel state information CSI feedback |
| CN102413523A (en) * | 2011-12-09 | 2012-04-11 | 东南大学 | Multi-user downlink transmission mode switching method in multi-input multi-output communication system |
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