CN106301669B - A kind of channel state information measurement feedback method - Google Patents
A kind of channel state information measurement feedback method Download PDFInfo
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- CN106301669B CN106301669B CN201510234669.1A CN201510234669A CN106301669B CN 106301669 B CN106301669 B CN 106301669B CN 201510234669 A CN201510234669 A CN 201510234669A CN 106301669 B CN106301669 B CN 106301669B
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Abstract
The present invention provides a kind of channel state informations to measure feedback method, this method comprises: being directed to any user terminal, base station configures CSI- reference symbol RS resource, it selects a vertical beam figuration direction come the CSI-RS resource configured to user terminal transmission according to system load in different moments, the user terminal is made to carry out CSI feedback according to feedback cycle；Base station receives the user terminal in the CSI fed back on each vertical beam figuration direction, stores corresponding CSI on each vertical beam figuration direction；Base station maximum CSI of selective value in the CSI of storage, and the CSI-RS resource configured is sent to the user terminal on value maximum CSI corresponding vertical beam figuration direction, feedback overhead and pilot-frequency expense can be saved.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of channel state information measures feedback method.
Background technique
The introducing of active antenna, makes it possible 3D MIMO technology, that is, in addition to level dimension can use multiple antennas
Wave beam forming and spatial reuse are carried out, multiple antennas is also can use in the vertical dimension and carries out the adjustment of dynamic angle of declination, carry out basis
The position of the vertical dimensions of UE adjusts the vertical beam figuration direction of vertical dimensions.
Using 3D MIMO technology, other than the channel state information (CSI) of measurement horizontal dimensions, it is also necessary to vertical
The CSI of dimension is measured.Channel state information is obtained since horizontal dimensions are measurement CSI, base station is fed back to, to complete
The various transmission plans of multiple antennas, and vertical dimensions will can be realized the direction adjustment of vertical dimensions wave beam forming, it is also desirable to it surveys
The CSI of vertical dimensions is measured to obtain the channel state information of vertical dimensions.
In view of system be using the two-dimensional antenna array of big quantity, need to examine whether it is necessary to define be greater than 8 ports
CSI configuration.The massive MIMO of a large amount of antenna element, with the increase of antenna element number, the sending point CSI port number
It is proportional increased.Although it is contemplated that being simply extended to more than the CSI- reference signal (RS) of 8 ports to one, such as expand
The position RE on each PRB pair is opened up, but can be very big on standardization influence, and the reduction of throughput of system can be brought.
The CSI that 8 ports can be reused in existing realization is allocated to the resource of the multiple CSI of terminal, the resource pair of each CSI
Different beam directions is answered, terminal can be allowed to feed back the corresponding measurement of different CSI resources in this way, base station is according to the measurement to each
Terminal carries out wave beam forming.
Although such implementation does not increase the port number of pilot tone, to increase the pilot-frequency expense of CSI, citing comes
It says, if the different directions of vertical dimension wave beam forming are 4, the scheme of three-dimensional wave beam forming, pilot tone can correspondingly be carried out
Expense is 4 times for carrying out two dimensional beam figuration.
Summary of the invention
In view of this, the application provides a kind of channel state information measurement feedback method, to solve feedback overhead and pilot tone
The excessive problem of expense.
In order to solve the above technical problems, the technical solution of the application is achieved in that
A kind of channel state information CSI measurement feedback method, this method comprises:
For any user terminal, base station configures CSI- reference symbol RS resource, is selected in different moments according to system load
Select a vertical beam figuration direction come to the user terminal send configuration CSI-RS resource, make the user terminal according to
Feedback cycle carries out CSI feedback；
The base station receives the user terminal in the CSI fed back on each vertical beam figuration direction, stores each vertical
Corresponding CSI on wave beam forming direction；
The base station maximum CSI of selective value in the CSI of storage, and assigned being worth the corresponding vertical beam of maximum CSI
The CSI-RS resource of configuration is sent on shape direction to the user terminal.
As can be seen from the above technical solution, in the application base station according to system load different moments select a vertical wave
The CSI-RS resource that beam figuration direction user terminal sends as user terminal configuration, and in the CSI of user terminal feedback
The CSI of maximum value is selected, and is sent on the maximum CSI of the value of selection corresponding vertical beam figuration direction to the user terminal
CSI can save feedback overhead and pilot-frequency expense.
Detailed description of the invention
Fig. 1 is that channel state information measures feedback method flow diagram in the embodiment of the present application；
Fig. 2 is the schematic diagram that CSI is sent in the embodiment of the present application.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples,
Technical solution of the present invention is described in detail.
A kind of channel state information measurement feedback method is provided in the embodiment of the present application, is applied to whole including base station and user
In the system at end.
It is that channel state information measures feedback method flow diagram in the embodiment of the present application referring to Fig. 1, Fig. 1.Specific step
Suddenly are as follows:
Step 101, for any user terminal, base station configures CSI-RS resource, is selected in different moments according to system load
Select a vertical beam figuration direction come to the user terminal send configuration CSI-RS resource, make the user terminal according to
Feedback cycle carries out CSI feedback.
Sometime, base station only sends a CSI-RS resource, and triggering user terminal is every time only in a vertical beam
Figuration feeds back CSI on direction.
When receiving the CSI-RS resource that base station is sent up in vertical beam figuration side for terminal, arrived in feedback cycle
When, Xiang Jizhan carries out CSI feedback on the vertical beam figuration direction.
Step 102, which receives the user terminal in the CSI fed back on each vertical beam figuration direction, deposits
Store up corresponding CSI on each vertical beam figuration direction.
Step 103, the base station maximum CSI of selective value in the CSI of storage, and it is corresponding vertical being worth maximum CSI
The CSI-RS resource of configuration is sent on wave beam forming direction to the user terminal.
When the base station determines that there is no user terminals to feed back CSI on any vertical beam figuration direction, then no longer in institute
State the CSI-RS resource that vertical beam figuration side sends up configuration.
Referring to fig. 2, Fig. 2 is the schematic diagram that CSI is sent in the embodiment of the present application.It is still assigned in Fig. 2 with two vertical beams
For shape direction (vertical beam figuration direction 1 and vertical beam figuration direction 2).
When the CSI corresponding according to each vertical beam figuration direction of local record of base station, determine in vertical beam figuration side
There is no user terminals there is feedback CSI on to 2, i.e. vertical beam figuration direction 2 does not correspond to CSI；And vertical beam figuration side
The CSI fed back to 1 corresponding multiple user terminals, then base station is only sent on vertical beam figuration direction 1 to each user terminal
CSI-RS resource sends CSI-RS resource to user terminal not on vertical beam figuration direction 2.
It is sent on the suitable vertical beam figuration of one of this determination direction to user terminal in the embodiment of the present application
CSI-RS resource is a kind of instantaneous single CSI-RS resource transmission, vertical beam figuration direction can be determined according to dynamic change,
Handle flow load with making network self-adapting.
In the embodiment of the present application, default of user terminal feedback can be received in base station for any user terminal
It when CSI on vertical beam figuration direction, that is, determines and is worth the corresponding vertical beam figuration of maximum CSI, can also hang down all
The corresponding vertical beam figuration of the maximum CSI of value is determined again after feeding back CSI on straight wave beam forming direction.
It is worth the corresponding vertical beam direction maximum CSI in the embodiment of the present application for a user terminal selecting, that is, determines
Position where the user terminal.
After base station sends up CSI-RS resource in some vertical beam figuration side to some user terminal, preset time
The CSI of the user terminal feedback is not received inside, it is determined that the user terminal is not on the vertical beam figuration direction.
In the case that antenna array subnumber mesh is very big, network is capable of the sending instant of aperiodic control CSI-RS resource,
Without wasting CSI-RS resource, if measured on specific vertical beam figuration direction without terminal, there is no need at this
Vertical beam side sends up CSI-RS resource.
Since user terminal is distributed in entire cell and user terminal is in moving condition, at some moment, institute
Some terminals are all located near the position of center of housing estate, also just only need to send up CSI-RS in corresponding vertical beam figuration side
Resource need not just send CSI-RS resource on other vertical beam figuration directions.So as to save CSI-RS resource.?
When cell deployment more massive antenna element, the resource overhead of pilot tone can be substantially reduced.
When preset time then, again according to system load select a vertical beam figuration direction come to user terminal send out
The CSI-RS resource that delivery is set.
In conclusion the application selects a vertical beam figuration direction in different moments according to system load by base station
The CSI-RS resource that user terminal sends as user terminal configuration, and maximum value is selected in the CSI of user terminal feedback
CSI, and on the maximum CSI of the value of selection corresponding vertical beam figuration direction to the user terminal send CSI, Neng Goujie
Save feedback overhead and pilot-frequency expense.
And preset time then, be again that the user terminal determines and sends wave beam forming direction, to use user whole
The movement at end.
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 (3)
1. a kind of channel state information CSI measures feedback method, which is characterized in that this method comprises:
For any user terminal, base station configures CSI- reference symbol RS resource, in different moments according to system load selection one
A vertical beam figuration direction to send the CSI-RS resource of configuration to the user terminal, makes the user terminal according to feedback
Period carries out CSI feedback；
The base station receives the user terminal in the CSI fed back on vertical beam figuration direction, stores vertical beam figuration
Corresponding CSI on direction；
The base station maximum CSI of selective value in the CSI of storage, and it is being worth the corresponding vertical beam figuration side maximum CSI
The CSI-RS resource of configuration is sent to the user terminal upwards.
2. the method according to claim 1, wherein the method further includes:
When the base station determines that all user terminals all feed back CSI on a vertical beam figuration direction, then described vertical
The CSI-RS resource of configuration is sent on wave beam forming direction to each user terminal.
3. method according to claim 1 or 2, which is characterized in that the method further includes:
When the base station determines that there is no user terminals to feed back CSI on any vertical beam figuration direction, then no longer described
Vertical beam figuration side sends up the CSI-RS resource of configuration.
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| CN106301669B true CN106301669B (en) | 2019-05-03 |
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| US11272429B2 (en) | 2017-02-13 | 2022-03-08 | Qualcomm Incorporated | Initiation of mobility reference signal based on quality of initial access signals |
| CN117241380A (en) * | 2017-04-01 | 2023-12-15 | 华为技术有限公司 | Uplink transmission method and device |
| CN109257754B (en) * | 2017-07-14 | 2021-06-22 | 华为技术有限公司 | Method and device for reporting and determining beam information |
| CN114257359B (en) * | 2020-09-24 | 2023-06-16 | 大唐移动通信设备有限公司 | CSI-RS measurement method and device |
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| CN103825664A (en) * | 2014-02-21 | 2014-05-28 | 电信科学技术研究院 | Method and device for measuring channel state information and method and device for transmitting signals |
| EP2750435A1 (en) * | 2011-10-03 | 2014-07-02 | Ntt Docomo, Inc. | Wireless communications system, feedback method, user terminal, and wireless base station device |
| WO2014113565A1 (en) * | 2013-01-17 | 2014-07-24 | Nec Laboratories America, Inc. | Channel feedback for vertical and full-dimensional beamforming |
| WO2015032038A1 (en) * | 2013-09-04 | 2015-03-12 | 华为技术有限公司 | Channel measurement method, terminal device and base station |
| CN104604170A (en) * | 2012-09-07 | 2015-05-06 | 株式会社Ntt都科摩 | Wireless base station, wireless communication system, and wireless communication method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2750435A1 (en) * | 2011-10-03 | 2014-07-02 | Ntt Docomo, Inc. | Wireless communications system, feedback method, user terminal, and wireless base station device |
| CN104604170A (en) * | 2012-09-07 | 2015-05-06 | 株式会社Ntt都科摩 | Wireless base station, wireless communication system, and wireless communication method |
| WO2014113565A1 (en) * | 2013-01-17 | 2014-07-24 | Nec Laboratories America, Inc. | Channel feedback for vertical and full-dimensional beamforming |
| WO2015032038A1 (en) * | 2013-09-04 | 2015-03-12 | 华为技术有限公司 | Channel measurement method, terminal device and base station |
| CN103825664A (en) * | 2014-02-21 | 2014-05-28 | 电信科学技术研究院 | Method and device for measuring channel state information and method and device for transmitting signals |
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Effective date of registration: 20211230 Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF INFORMATION AND COMMUNICATIONS Address before: 100045 Beijing city Xicheng District Yuetan Nan Street 11 Patentee before: The Research Institute of Telecommunications Transmission MIIT |