CN103873124B - A kind of measurement method of mobile terminal and its channel state information measuring reference signals - Google Patents
A kind of measurement method of mobile terminal and its channel state information measuring reference signals Download PDFInfo
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Abstract
This application discloses the measurement methods of channel state information measuring reference signals (CSI RS) a kind of, comprising: UE obtains the occupied Physical Resource Block position CSI RS；UE utilizes received CSIR S on the Physical Resource Block position to estimate channel state information, and calculates CQI and/or pre-coding matrix instruction PMI；Wherein, the CSI RS is the CSI RS after precoding.Disclosed herein as well is a kind of mobile terminals.Using the application, system performance can be improved.
Description
Technical field
Mobile terminal and its channel shape the present invention relates to wireless communication technique, in particular in a kind of wireless communication system
The measurement method of state information measurement reference signal (CSI RS).
Background technique
In advanced long-term evolution system (LTE-A), in order to improve cell throughout, reduce the interference between user, often
A cell can configure 16,32,64 or more root transmitting antennas for doing wave beam forming.Base station is that each user equipment (UE) matches
Confidence channel state information measuring reference signals (CSI RS) are used to measure the CSI of channel, are then fed back.In 3GPP version 12
The design of CSI RS before is designed according to the actual number of antenna, most due to the CSI RS before 3GPP version 12
There are 8 ports more, 8 resource units is at most occupied in each Physical Resource Block, as shown in Figure 1.
In lte-a system, the resource of CSI RS is that UE is used to measure channel state information, and channel state information includes
Channel quality indicates (CQI) and pre-coding matrix instruction (PMI) etc..Currently, CSI RS is to be sent to UE by base station, and entire
Corresponding CSI RS original signal is directly transmitted in downlink system bandwidth, as shown in Figure 2.UE is obtained by the measurement to CSI RS
CQI and PMI.Specifically, the measurement method of CQI is to first pass through CSIR's S measurement to estimate channel information, it is then assumed that in signal
Transmitting terminal uses specific PMI, and to measure corresponding CQI, i.e. the measurement of CQI is carried out based on a PMI.
In lte-a system, the SRS points of SRS and aperiodic SRS signal for the period, the SRS transmission in period includes frequency hopping
SRS signal and non-hopping SRS signal.For each UE, SRS bandwidth B is configured by high-level signalingSRS, BSRSIt is that the UE is every
The secondary bandwidth for sending SRS.For each UE, if the UE supports SRS frequency hopping, the SRS frequency hopping band configured by high-level signaling
Wide bhop, when determining SRS frequency hopping UE may the bandwidth of SRS signal that arrives of frequency hopping, as shown in Figure 3.
As previously mentioned, CSI RS is directly transmitted in whole system bandwidth at present；However, working as the number of antennas of system
When sharply increasing, the original signal amount of CSI RS will also be sharply increased, if still directly transmitting CSI in whole system bandwidth
RS original signal needs to occupy a large amount of system resource, influences whether the transmission of data information in system.
Summary of the invention
In view of this, the main purpose of the application is to provide a kind of channel state information measuring reference signals (CSI RS)
Measurement method, system performance can be improved.
A kind of measurement method of channel state information measuring reference signals CSI RS, comprising:
UE obtains the occupied Physical Resource Block position CSI RS；
UE utilizes the received CSI RS on the Physical Resource Block position to calculate CQI and/or pre-coding matrix instruction
PMI；Wherein, the CSI RS is the CSI RS after precoding.
Preferably, bandwidth corresponding to the occupied Physical Resource Block position CSI RS is fixed in advance in communication standard
Justice.
Preferably, bandwidth corresponding to Physical Resource Block position occupied by the CSI RS is dl system bandwidth
Subset.
Preferably, the corresponding bandwidth in Physical Resource Block position occupied by the CSI RS is system configuration；
Bandwidth corresponding to the occupied Physical Resource Block position the CSI RS of the system configuration are as follows: pre- in communication standard
Subset first define or dl system bandwidth.
Preferably, working as bandwidth corresponding to Physical Resource Block position occupied by the CSI RS is the downlink bandwidth
Subset when, there are in the subframe of the CSI RS, the occupied Physical Resource Block position CSI RS is identical.
Preferably, the mode for obtaining the corresponding bandwidth in the occupied Physical Resource Block position CSI RS includes: described
The instruction that UE receives high-level signaling obtains the Physical Resource Block position.
Preferably, Physical Resource Block position occupied by the CSI RS and the occupied Physical Resource Block position of SRS signal
The frequency domain position at place is the same.
Preferably, when SRS frequency hopping is not configured in the SRS signal, Physical Resource Block position occupied by the CSI RS is
PRB pair or the PRB pair combination that the SRS signal occupies；
When the SRS signal configures SRS frequency hopping, Physical Resource Block position occupied by the CSI RS is that SRS signal exists
The set of all frequency domain positions of uplink.
Preferably, the pre-coding matrix that the CSI RS in same PRB set is used is identical.
Institute is gathered using a PRB of identical pre-coding matrix preferably, determining according to the bandwidth that the CSI RS is occupied
Including PRB number；Alternatively,
It is determined included by the PRB set using identical pre-coding matrix according to the dl system bandwidth
PRB number.
Preferably, using identical precoding square according to being semi-statically configured or determining according to the fixed setting of system for system
The included PRB number of the PRB set of battle array.
Preferably, described be semi-statically configured for configuring the PRB number；Alternatively,
Described to be semi-statically configured for configuring the mode for determining the PRB number, the mode of the determination PRB number is root
The PRB number is determined according to the bandwidth that CSI RS is occupied, or the PRB number is determined according to dl system bandwidth.
A kind of mobile terminal, including CSI RS position determination unit and channel status determination unit；
The CSI RS position determination unit, for obtaining the occupied Physical Resource Block position CSI RS；
The channel status determination unit, for utilizing CSI RS estimation letter received on the Physical Resource Block position
Channel state information, and calculate CQI and/or PMI；Wherein, the CSI RS is the CSI RS after precoding.
Using the above scheme of the application, UE obtains the occupied Physical Resource Block position CSI RS, and using corresponding
Received CSI RS calculates CQI and/or PMI on position.Wherein, the received CSI RS of UE is CSI of the base station after precoding
RS.It by the processing of above-mentioned the application, is sent after precoding being carried out to CSI RS, so that the processing by precoding improves system
The occupied resource of CSI RS is saved in system performance, the port for reducing CSI RS.Further, by CSI RS identical with SRS
It is transmitted on frequency band, so as to preferably match the characteristic of channel according to acquired in SRS, the performance for measuring CSI is more acurrate.
Detailed description of the invention
Fig. 1 is CSI RS physical resource structural schematic diagram in each PRB；
Fig. 2 is CSI RS physical resource structural schematic diagram in system bandwidth；
Fig. 3 is SRS frequency hopping schematic diagram；
Fig. 4 is the system flow chart of the CSI RS measurement method of the application；
Fig. 5 is the CSI RS occupied bandwidth schematic diagram of one embodiment of the application；
Fig. 6 is the CSI RS occupied bandwidth schematic diagram of one embodiment of the application；
Fig. 7 is the CSI RS occupied bandwidth schematic diagram of one embodiment of the application；
Fig. 8 is the CSI RS occupied bandwidth schematic diagram of one embodiment of the application；
Fig. 9 is the CSI RS occupied bandwidth schematic diagram of one embodiment of the application；
Figure 10 is the concrete structure schematic diagram of mobile terminal in the application.
Specific embodiment
In order to which the purpose, technological means and advantage of the application is more clearly understood, the application is done below in conjunction with attached drawing
It is further described.
As described in aforementioned background art, with sharply increasing for system antenna number, if still in full bandwidth range
The interior original signal for directly transmitting CSI RS, it will cause a large amount of system resources to be occupied by CSI RS, influences data transmission.It is based on
This, the application provides the measurement method of CSI RS a kind of, and UE no longer directly receives CSI RS original signal, but utilizes TDD system
The reciprocity of system uplink and downlink channel receives base station and pre-coding matrix is utilized to carry out the CSI RS after precoding.Wherein, base station according to
After the SRS signal that UE is sent carries out channel estimation and determines therefrom that out a pre-coding matrix, according to TDD system uplink and downlink channel
Reciprocity is then forwarded to UE after CSI RS is carried out precoding using pre-coding matrix.In this way, by prelisting to CSI RS
Code processing, can substantially reduce the data volume of CSI RS signal, to save system resource.Meanwhile for system antenna number
Not many situation itself can not also change the semaphore of CSI RS, but by the precoding processing to CSI RS, improve
The transmission performance of CSI RS improves system performance to improve the accuracy of channel estimation.
Here, it since CSI RS is to be sent to UE after pre-coding matrix carries out precoding, is surveyed according to CSIR S
Measuring the channel information estimated is that equivalent channels information can also obtain using the precoding square by this equivalent channels information
CQI when battle array.
The specific implementation of the application is described in detail below by specific embodiment.Fig. 4 is the application CSIR S measurement
The flow chart of embodiment.As shown in Figure 4, comprising the following steps:
Step 401:UE obtains the position of frequency domain resource occupied by CSI RS；
CSI RS is the resource used for UE measurement channel state, and UE is to measuring CSI RS and obtain letter
Channel state information, thus feeding back channel state information, UE needs to know CSI RS in the position of frequency domain, that is, the object of CSI RS
Manage the position resource block (PRBs).Wherein, CSI RS here refers to the CSI RS after pre-coding matrix carries out precoding processing.
Specific pre-coding matrix, which can be, can improve system performance, and concrete form can be designed according to actual needs.Such as
The pre-coding matrix of CSI RS semaphore is reduced, the columns of the specific pre-coding matrix can be less than line number.In more detail, UE is obtained
Taking frequency domain resource position occupied by CSI RS, there are several types of methods:
Method 1:
The position of frequency domain resource occupied by CSI RS is predetermined in a standard.For example, CSI RS reference signal occupies
Bandwidth be dl system bandwidth that MIB or high-level signaling indicate, in this way, UE is obtaining mib information or high-level signaling
After the dl system bandwidth of instruction, it is also known that the bandwidth that CSI RS is occupied.For example, when the downlink of MIB instruction
When system bandwidth is 20M, CSI RS is distributed on 110 Physical Resource Block (PRB) that system bandwidth is 20M, as shown in Figure 2.
Method 2:
The corresponding bandwidth of frequency domain position that CSI RS is occupied is the subset of entire dl system bandwidth.For example, working as MIB
When the dl system bandwidth of instruction is 20M, CSI RS is distributed in N(N < 110) on a Physical Resource Block (PRB), such as Fig. 5
It is shown；
When the bandwidth that CSI RS is occupied is the subset of entire dl system bandwidth, there are the sons of CSI RS all
In frame, the position PRB that CSI RS reference signal occupies is the same, as shown in fig. 6, can be convenient UE in different subframes in this way
Interior measure channel state information.Because measurable there are CSI RS reference signals all there are in the subframe of CSI RS
The CSI RS that the group of any PRB pair or PRB pair is closed in bandwidth.
When the bandwidth that CSI RS is occupied is the subset of system bandwidth, UE obtains the specific occupied bandwidth location of CSI RS
There are following methods, illustrates separately below.
Mode 1:
UE obtains the occupied bandwidth of CSI RS reference signal by receiving high-level signaling instruction.UE passes through high-level signaling
The instruction of information, it is known that there are CSI RS reference signal on which PRB, such UE can there are the PRB pair of CSI RS or
CSI measurement is carried out in PRB pair combination.Such as system configures the starting PRB and CSI of CSI RS reference signal by high-level signaling
The PRB number that RS is occupied, UE have been known that the occupied PRB pair of CSI RS reference signal or PRB pair after receiving the high-level signaling
Combination, to measure the channel state information in respective bandwidth, as shown in Figure 7.When in this way, CSI RS is occupied
Bandwidth can be configured freely, unrestricted.
Mode 2:
The occupied bandwidth of CSI RS reference signal is as the bandwidth that the SRS reference signal of UE may be skipped.
Specifically, when SRS reference signal is that SRS frequency hopping is not configured, in uplink band bandwidth BSRSUpper transmission SRS, under
CSI RS reference signal is transmitted in the corresponding bandwidth of line frequency section, i.e., the PRB that CSI RS reference signal occupies is transmitted on downlink
Pair or PRB pair combination with uplink transmission SRS reference signal occupancy PRB pair or PRB pair combine it is identical, as shown in Figure 8；
When SRS reference signal configuration SRS is frequency hopping, in each subframe of transmission SRS reference signal, UE is SRS's
SRS reference signal is transmitted on the PRB of frequency hopping bandwidth, in each subframe of transmission CSI RS reference signal, UE is in SRS with reference to letter
CSI RS reference signal is transmitted in number all bandwidth that may be skipped.For example, the bandwidth that SRS is transmitted every time is BSRS, SRS frequency hopping
The combination of the PRB pair or PRB pair of the possible different location of the same band occupied every time, CSI RS is every time in downlink transmission
Frequency domain position is exactly set of the SRS in all frequency domain positions of uplink, as shown in Figure 9.
Since the pre-coding matrix for carrying out precoding to CSI RS is according to the uplink channel estimation knot carried out by SRS signal
Determined by fruit, therefore, when the occupied bandwidth of CSI RS is identical as SRS band occupancy, CSI RS channel experienced with
The characteristic of channel for obtaining corresponding pre-coding matrix is identical, then, can be more by the estimated channel state information of the CSI RS
Accurately.
Above-mentioned is when the occupied bandwidth of CSI RS is the subset of dl system bandwidth, and UE obtains CSIR S tool
The mode of body occupied bandwidth.
Method 3:
The bandwidth that CSI RS reference signal occupies can also be configurable, i.e. the feelings of CSI RS reference signal occupied bandwidth
Condition is configured by high-level signaling.It can be aforementioned two methods for the occupied bandwidth of CSI RS of configuration, i.e., by leading to
Subset pre-defined or for dl system bandwidth in beacon standard.CSI can be indicated by the different Configuration Values of system
The method of determination of RS reference signal occupied bandwidth.
It may for instance be considered that default configuration or " band width configuration that CSI RS reference signal occupies " value are a certain specific
When value, the bandwidth for indicating that CSI RS reference signal occupies is (such as dl system bandwidth) predetermined in communication standard；
When " band width configuration that CSI RS reference signal occupies " value is another particular value, the band that CSI RS reference signal occupies is indicated
Width is the subset of dl system bandwidth；
Step 402:UE estimates channel state information using CSI RS reference signal, and calculates CQI and/or PMI.
In this step, UE is used to carry out the CSI RS signal of channel state information estimation as the letter by precoding processing
Number, therefore as previously mentioned, the channel state information that its estimation obtains is equivalent channels status information.Specifically carrying out channel status
When estimation, individual channel estimation can be carried out according to the CSI RS signal on each PRB with existing way similarly.
Alternatively, base station, can be multiple when carrying out CSI RS precoding to further increase the performance of channel estimation
Identical pre-coding matrix is used on PRB.In this way, can combine when UE carries out channel estimation in this step using identical pre-
CSI RS on multiple PRB of encoder matrix carries out joint channel estimation, to improve the performance of channel estimation.
Specifically, can gather using the PRB of identical pre-coding matrix as a PRB.UE is in estimation CSI RS letter
When channel state information is with CQI and/or PMI is calculated, it is believed that the pre-coding matrix used by the CSI RS that PRB collection closes is the same
's.For the joint channel estimation for correctly carrying out multiple CSI RS, UE is it needs to be determined that go out which PRB belongs to same PRB set.Specifically
Mode can be there are several types of:
1, an included PRB number of PRB set is related to the bandwidth that CSI RS is transmitted, and UE is according to shared by current CSI RS
Bandwidth determines the included PRB number of a PRB set.For example, being transmitted for the PRB number that PRB set includes with CSI RS
Bandwidth establishes corresponding relationship, and as shown in table 1, the bandwidth of CSI RS refers to the PRB number of transmission CSI RS reference symbol, and PRG
Size refers to that UE thinks that the PRB in PRG size uses identical pre-coding matrix, that is, included by a PRB set
PRB number.Certainly, table 1 is only an example, can also establish other corresponding relationships.Preferably, the bandwidth of CSI RS transmission
Bigger, an included PRB number of PRB set is more.
Table 1
2, an included PRB number of PRB set is related to dl system bandwidth, and UE is according to downlink system band
The included PRB number of one PRB set of wide determination.For example, similarly with first way, the PRB for including can be gathered for PRB
Several to establish corresponding relationship with dl system bandwidth, as shown in table 2, PRG size refers to that UE thinks in PRG size
PRB uses identical pre-coding matrix.Wherein, the size of downlink system can be by UE by receiving Master Information Block (MIB)
Or high-level signaling obtains, and it is identical as existing way, it just repeats no more here.
Table 2
3, the mode being semi-statically configured.
Wherein directly the PRB set of the CSI RS of identical pre-coding matrix can be used occupied by semi-static be arranged
PRB number, UE determine that a PRB gathers occupied PRB number according to being semi-statically configured for system.
Alternatively, the specific method of determination of included PRB number can also be gathered by semi-static one PRB of setting, such as half
Static state setting determines corresponding PRB number according to dl system bandwidth, alternatively, semi-static be arranged the band occupied according to CSI RS
Width determines corresponding PRB number, that is to say, that in the way of can determining PRB number in such a way that semi-static setting is using aforementioned 1 or 2.UE
According to semi-static setting, determine that a PRB gathers the PRB number for including by the way of 1 or 2.
Due to being to be semi-statically configured, the mode of corresponding PRB number or determining PRB number can also be updated as needed.
For example, being configured using the PRB number that the PRB subset of the CSI RS of identical pre-coding matrix occupies by high-level signaling, UE passes through reading
The PRB that high-level signaling obtains the CSI RS of identical pre-coding matrix gathers shared PRB number.
4, it can also be that system is fixedly installed using the PRB number that the PRB set of the CSI RS of identical pre-coding matrix occupies
, i.e., the bandwidth and system bandwidth for no matter transmitting CSI RS reference symbol are how many, using the CSI of identical pre-coding matrix
The PRB number that the PRB subset of RS occupies is PRB that is fixed, such as being occupied using the PRB subset of the CSI RS of identical pre-coding matrix
Number is 4.
Included PRB block, which can according to need, after determining the PRB number N that a PRB set includes, in each set sets
It sets, belongs to the common technology means of those skilled in the art.For example, continuous N number of PRB, which can be set, belongs to same PRB set.
As long as base station and the unified corresponding setting of UE, repeat no more here.
The CSI RS using identical pre-coding matrix is determined in the manner described above, so that it may combine these CSI RS progress
Channel estimation, and calculate CQI and/or PMI.Can combine all CSI RS in same PRB set or part CSI RS into
Row channel estimation, specifically can according to need and is configured.
So far, the CSI RS measurement method process in the embodiment of the present application terminates.
Present invention also provides a kind of mobile terminal, it can be used for implementing the CSI RS measurement method in above-mentioned the application.
Figure 10 is the concrete structure schematic diagram of mobile terminal in the application.As shown in Figure 10, which includes that the position CSI RS is true
Order member and channel status determination unit.
Wherein, CSI RS position determination unit, for obtaining the occupied Physical Resource Block position CSI RS；Channel status
Determination unit for estimating channel state information using CSI RS received in respective physical resource block location, and calculates CQI
And/or PMI；Wherein, the CSI RS after CSI RS is the pre-coding matrix precoding indicated by the PMI.
In short, CSI RS can improve system performance after precoding processing using the technical solution of the application, and
The resource that CSI RS occupancy can be greatlyd save when needed makes more downlink physical resources for physical down link channel
(PDSCH) transmission, to improve the handling capacity of downlink business.Meanwhile by occupying the bandwidth of CSI RS occupancy with SRS
Frequency band is identical, so that the CQI for solving CSI RS measurement obtains PMI matching problem with by SRS, improves CSI RS channel estimation
Accuracy；In addition, carrying out joint channel estimation to using multiple CSI RS of identical precoding by UE, improve to CSI RS
The accuracy of channel estimation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (22)
1. a kind of measurement method of channel state information measuring reference signals CSI RS, it is characterised in that this method comprises:
User equipment (UE) obtains the occupied Physical Resource Block position channel state information reference signals CSI RS；
UE utilizes the received CSI RS on the Physical Resource Block position to calculate channel quality indicator (CQI) and/or precoding square
Battle array instruction PMI；Wherein, the corresponding bandwidth in the occupied Physical Resource Block position the CSI RS is dl system bandwidth
Subset.
2. the method according to claim 1, wherein the occupied Physical Resource Block position institute of the CSI RS is right
The bandwidth answered is predetermined in communication standard.
3. the method according to claim 1, wherein there are in the subframe of the CSI RS, the CSI RS
Occupied Physical Resource Block position is identical.
4. the method according to claim 1, wherein the occupied Physical Resource Block position acquisition CSI RS
The mode of corresponding bandwidth includes: the instruction acquisition Physical Resource Block position that the UE receives high-level signaling.
5. the method according to claim 1, wherein Physical Resource Block position and SRS occupied by the CSI RS
Frequency domain position where the occupied Physical Resource Block position of signal is the same.
6. according to the method described in claim 5, it is characterized in that, when SRS frequency hopping is not configured in the SRS signal, the CSI
Physical Resource Block position occupied by RS is the PRB pair that the SRS signal occupies or PRB pair combination；
When the SRS signal configures SRS frequency hopping, Physical Resource Block position occupied by the CSI RS is SRS signal in uplink
The set of all frequency domain positions of link.
7. according to claim 1, method described in 2,4,5 or 6, which is characterized in that the CSI RS in same PRB set was used
Pre-coding matrix is identical.
8. the method according to the description of claim 7 is characterized in that being determined according to the bandwidth that the CSI RS is occupied using identical
The included PRB number of the PRB set of pre-coding matrix；Alternatively,
The PRB number included using the PRB set of identical pre-coding matrix is determined according to dl system bandwidth.
9. the method according to the description of claim 7 is characterized in that according to being semi-statically configured for system or consolidating according to system
Fixed setting determines the PRB number included using the PRB set of identical pre-coding matrix.
10. according to the method described in claim 9, it is characterized in that, described be semi-statically configured for configuring the PRB number；Or
Person,
Described to be semi-statically configured for configuring the mode for determining the PRB number, the mode of the determination PRB number is, according to CSI
The bandwidth that RS is occupied determines the PRB number, or determines the PRB number according to dl system bandwidth.
11. the method according to claim 1, wherein the UE obtains the occupied Physical Resource Block of CSI RS
Position includes:
UE receives the PRB number that the starting PRB and CSI RS of the CSI RS configured by high-level signaling is occupied.
12. a kind of mobile terminal, which is characterized in that the mobile terminal includes that CSI RS position determination unit and channel status determine
Unit；
The CSI RS position determination unit, for obtaining the occupied Physical Resource Block position CSI RS；
The channel status determination unit, for estimating channel shape using CSI RS received on the Physical Resource Block position
State information, and calculate CQI and/or PMI；Wherein, under the corresponding bandwidth in the occupied Physical Resource Block position the CSI RS is
The subset of line link system bandwidth.
13. mobile terminal according to claim 12, which is characterized in that the occupied Physical Resource Block position CSI RS
It is predetermined in communication standard for setting corresponding bandwidth.
14. mobile terminal according to claim 12, which is characterized in that described there are in the subframe of the CSI RS
The occupied Physical Resource Block position CSI RS is identical.
15. mobile terminal according to claim 12, which is characterized in that the occupied physical resource of the acquisition CSI RS
The mode of the corresponding bandwidth in block position includes: the instruction acquisition object that the CSI RS position determination unit receives high-level signaling
Manage resource block location.
16. mobile terminal according to claim 12, which is characterized in that Physical Resource Block position occupied by the CSI RS
As the frequency domain position where the occupied Physical Resource Block position of SRS signal.
17. mobile terminal according to claim 16, which is characterized in that when SRS frequency hopping is not configured in the SRS signal,
Physical Resource Block position occupied by the CSI RS is the PRB pair that the SRS signal occupies or PRB pair combination；
When the SRS signal configures SRS frequency hopping, Physical Resource Block position occupied by the CSI RS is SRS signal in uplink
The set of all frequency domain positions of link.
18. mobile terminal described in 2,13,15,16 or 17 according to claim 1, which is characterized in that in same PRB set
The pre-coding matrix that CSI RS is used is identical.
19. mobile terminal according to claim 18, which is characterized in that the bandwidth determination occupied according to the CSI RS is adopted
With the included PRB number of the PRB set of identical pre-coding matrix；Alternatively,
The PRB number included using the PRB set of identical pre-coding matrix is determined according to dl system bandwidth.
20. mobile terminal according to claim 18, which is characterized in that according to being semi-statically configured or according to being for system
The fixed setting of system determines the PRB number included using the PRB set of identical pre-coding matrix.
21. mobile terminal according to claim 20, which is characterized in that according to being semi-statically configured or according to being for system
The fixed setting of system determines the PRB number included using the PRB set of identical pre-coding matrix；
It is described to be semi-statically configured for configuring the PRB number；Alternatively,
Described to be semi-statically configured for configuring the mode for determining the PRB number, the mode of the determination PRB number is, according to CSI
The bandwidth that RS is occupied determines the PRB number, or determines the PRB number according to dl system bandwidth.
22. mobile terminal according to claim 12, which is characterized in that the CSI RS position determination unit obtains CSI
The occupied Physical Resource Block position RS includes:
Starting PRB and the CSI RS that the CSI RS position determination unit receives the CSI RS configured by high-level signaling are occupied
PRB number.
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| CN106685582A (en) * | 2015-11-06 | 2017-05-17 | 中兴通讯股份有限公司 | CSI feedback and codebook configuration signaling configuration method and device |
| CN106992837B (en) | 2016-01-20 | 2020-06-16 | 华为技术有限公司 | Multi-antenna data transmission method, network equipment, terminal equipment and system |
| RU2761248C2 (en) * | 2016-05-13 | 2021-12-06 | Телефонактиеболагет Лм Эрикссон (Пабл) | Mechanism for csi-rs reduced density |
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| CN110138469A (en) | 2019-08-16 |
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