CN106559123B - Weight value obtaining method and device - Google Patents
Weight value obtaining method and device Download PDFInfo
- Publication number
- CN106559123B CN106559123B CN201510629380.XA CN201510629380A CN106559123B CN 106559123 B CN106559123 B CN 106559123B CN 201510629380 A CN201510629380 A CN 201510629380A CN 106559123 B CN106559123 B CN 106559123B
- Authority
- CN
- China
- Prior art keywords
- channel quality
- weight
- base station
- data
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
-
- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
-
- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0634—Antenna weights or vector/matrix coefficients
-
- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
-
- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0658—Feedback reduction
- H04B7/0663—Feedback reduction using vector or matrix manipulations
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a weight value obtaining method and a weight value obtaining device, wherein a base station obtains channel quality information; and when the base station judges that the channel quality meets a preset channel quality threshold according to the obtained channel quality information, the base station adjusts the weight information issued by the data. The technical scheme provided by the invention breaks through the dependence of the base station on the terminal report information, enables the base station to give full play to the resource advantages of the base station, combines the SRS resource with the terminal report information, intelligently selects the weighted weight when the data is issued according to the channel quality condition, namely the RI reported by the terminal, and combines the CQI, so that the weight of the base station side is better matched with the channel, the frequency spectrum efficiency of the system is improved, the system performance is improved, and the user experience is also ensured.
Description
Technical Field
The present invention relates to multi-user MIMO technology, and more particularly, to a method and apparatus for obtaining weights.
Background
A Long Term Evolution (LTE) system is developed rapidly, an LTE network has already been commercialized in many places, and with continuous increase of commercial pace and rapid increase of the number of users in a commercial environment, the LTE system needs to accommodate more users on the premise of ensuring user experience, which needs to adopt an enhanced Multiple-Input Multiple-Output (MIMO) technology to meet the requirements of users on a wireless system.
As one of the key technologies of the LTE system, the mimo wireless transmission technology is an advantage to solve the throughput problem. The space resource utilization rate can be improved through full excavation, and the frequency spectrum efficiency is improved, so that the purposes of enhancing the customer experience and improving the system capacity are achieved. The multiple-input multiple-output wireless transmission technology can fully excavate space resources and improve the utilization rate of frequency spectrum, and is also the key point of the research of the 3GPP which can become a new generation of mobile communication standard.
The multi-user MIMO technology can obtain a better system and capacity through multi-user spatial multiplexing. In recent years, multiuser MIMO has gained wide attention both in the theoretical and industrial sectors. The multi-user MIMO downlink transmission technology needs to obtain channel state information of each user at a base station end to ensure data transmission efficiency. In practical applications, the instantaneous channel state information is generally obtained by a user side through a channel estimation mode and is fed back to the base station through a feedback link with a limited rate. When the feedback delay is greater than the coherence time of the channel, the channel state information obtained by the base station at a certain transmission time is completely irrelevant to the actual channel state information at the time. If the instantaneous channel state information adopted by the base station is completely outdated, the conventional multi-user transmission scheme cannot be effectively implemented, and if the conventional transmission scheme is still implemented, the system performance is reduced. That is, in this case, since the channel state information fed back by the UE is relatively delayed, the system performance is degraded.
Disclosure of Invention
In order to solve the technical problem, the invention provides a weight value obtaining method and a weight value obtaining device, which can improve the system performance and enhance the user experience.
In order to achieve the purpose of the invention, the invention provides a weight value obtaining method, which comprises the following steps:
the base station periodically acquires channel quality information;
and when the base station judges that the channel quality meets a preset channel quality threshold according to the obtained channel quality information, the base station adjusts the weight information issued by the data.
Optionally, the channel quality information includes a rank indication RI, a precoding matrix indication PMI, and a channel quality indication CQI of the channel.
Optionally, the channel quality threshold is a first channel quality threshold M;
the channel quality meets the preset channel quality threshold value as follows: the obtained RI is less than or equal to N, and the obtained CQI is less than a first channel quality threshold M; wherein N is less than or equal to the number of antenna ports for transmitting SRS;
the weight information issued by the adjustment data is as follows: the base station triggers the non-periodic SRS to be transmitted upwards and adopts the non-periodic SRS which is transmitted recently to calculate the weight value sent down by the data; the time interval of the non-periodic SRS is triggered intelligently by the base station according to the channel condition.
Optionally, the channel quality threshold is a second channel quality threshold M1;
the channel quality meets the preset channel quality threshold value as follows: the obtained RI is less than or equal to N and the obtained CQI is less than a second channel quality threshold M1; wherein N is less than or equal to the number of antenna ports for transmitting SRS;
the weight information issued by the adjustment data is as follows: and the base station performs radio resource connection RRC reconfiguration, switches from a closed-loop transmission mode to an open-loop transmission mode, starts periodic SRS uploading, and calculates a weight value sent by data by adopting the periodic SRS.
Optionally, the channel quality threshold is a third channel quality threshold M2;
the channel quality meets the preset channel quality threshold value as follows: the obtained RI is greater than N, the obtained CQI is greater than or equal to a third channel quality threshold M2, and the high-level transmission mode is configured for an open-loop transmission mode; wherein N is less than or equal to the number of antenna ports for transmitting SRS;
the weight information issued by the adjustment data is as follows: and the high layer of the base station reconfigures a transmission mode and configures the transmission mode into a closed-loop transmission mode, and the base station adopts the obtained PMI as a weight value of data issuing in the closed-loop transmission mode.
Optionally, the channel quality information satisfies a preset channel quality threshold as follows: the RI obtained is greater than the N; wherein N is less than or equal to the number of antenna ports;
and the base station adopts the obtained PMI as a weight value issued by the data.
Optionally, the method further comprises: and carrying out weighting processing on the issued data by using the calculated weight.
The invention also provides a weight value acquisition device, which comprises an acquisition module and a processing module, wherein,
an obtaining module, configured to obtain channel quality information;
and the processing module is used for adjusting weight information issued by the data when judging that the channel quality meets a preset channel quality threshold according to the obtained channel quality information.
Optionally, the processing module is specifically configured to:
when RI in the obtained channel quality information is less than or equal to N and CQI in the obtained channel quality information is less than a first channel quality threshold M, triggering the non-periodic SRS to be transmitted, and calculating a weight value issued by data by adopting the non-periodic SRS which is transmitted recently;
when RI in the obtained channel quality information is less than or equal to N and CQI in the obtained channel quality information is less than a second channel quality threshold value M1, performing RRC reconfiguration, switching from a closed-loop transmission mode to an open-loop transmission mode, starting periodic SRS uploading, and calculating a weight value of data issuing by adopting the periodic SRS;
when the RI in the obtained channel quality information is greater than N, the CQI in the obtained channel quality information is greater than or equal to a third channel quality threshold value M2, and the high-level transmission mode is configured in an open-loop transmission mode, under the reconfigured closed-loop transmission mode, the PMI in the obtained channel quality information is adopted as a weight value issued by data;
when RI in the obtained channel quality information is greater than N, PMI in the obtained channel quality information is adopted as a weight value issued by data;
wherein N is less than or equal to the number of antenna ports for transmitting SRS.
Optionally, the processing module is further configured to: and when the obtained channel quality does not meet the preset channel quality threshold, keeping the current weight value obtaining mode.
Optionally, the processing module is further configured to: and carrying out weighting processing on the issued data by using the calculated weight.
Optionally, the weight obtaining device is disposed in a base station, or is an independent entity.
Compared with the prior art, the technical scheme of the application comprises the steps that a base station acquires channel quality information; and when the base station judges that the channel quality meets a preset channel quality threshold according to the obtained channel quality information, the base station adjusts the weight information issued by the data. The technical scheme provided by the invention breaks through the dependence of the base station on the terminal report information, enables the base station to give full play to the resource advantages of the base station, combines the SRS resource with the terminal report information, intelligently selects the weighted weight when the data is issued according to the channel quality condition, namely the RI reported by the terminal, and combines the CQI, so that the weight of the base station side is better matched with the channel, the frequency spectrum efficiency of the system is improved, the system performance is improved, and the user experience is also ensured.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a weight obtaining method according to the present invention;
fig. 2 is a schematic diagram of a structure of a weight obtaining device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Fig. 1 is a flowchart of a weight obtaining method of the present invention, as shown in fig. 1, including:
step 100: the base station acquires channel quality information.
In this step, the UE may be configured by the base station to report the channel quality information periodically, and the specific implementation is a conventional technical means of those skilled in the art, and is not used to limit the protection scope of the present invention, and is not described herein again.
The Channel Quality information may include Rank Indication (RI) of a Channel, Precoding Matrix Indication (PMI), and Channel Quality Indication (CQI).
Step 101: and when the base station judges that the channel quality meets a preset channel quality threshold according to the obtained channel quality information, the base station adjusts the weight information issued by the data.
In this step, the channel quality threshold may be set according to an actual application scenario, and may be higher when the channel condition is good, and may be lower when the channel condition is poor.
The concrete realization of this step includes:
when the system configures that the UE can only send up the aperiodic SRS:
the channel quality in this step satisfies the preset channel quality threshold as follows: and if the RI reported by the UE is less than or equal to N and the CQI is less than a first channel quality threshold value M, wherein N is less than or equal to the number of antenna ports transmitted on a Sounding Reference Signal (SRS).
The weight information issued by the adjustment data in this step is: and the base station triggers the aperiodic SRS to be transmitted, and calculates the weight value of data transmission by adopting the latest aperiodic SRS to be transmitted. Thus, the issued data can be weighted by the calculated weight. The time interval of the non-periodic SRS is triggered intelligently by the base station according to the channel condition, for example, the base station may trigger according to the number of times of reporting Negative Acknowledgements (NACKs) within a specified time T, and if the number of times of reporting NACKs is greater than a preset trigger threshold N1 within the specified time T, the non-periodic SRS is triggered to be sent; the value of T is smaller at the specified time when the required sensitivity is higher; those skilled in the art will readily understand that the determination of N1 is related to the block error rate required by the system, and the lower the block error rate is, the lower the value of N1 is. It should be noted that, here, only how to trigger the aperiodic SRS uplink is illustrated, but not limited to the manner of triggering the aperiodic SRS uplink of the present invention, and how to calculate the weight value of data issue according to the SRS belongs to the known technology of the person skilled in the art, and is not used to limit the protection scope of the present invention, and details are not described here.
Alternatively, the first and second electrodes may be,
when the system configures that the UE can only send up the periodic SRS:
the channel quality in this step satisfies the preset channel quality threshold as follows: if the RI reported by the UE is less than or equal to N and the CQI is less than a second channel quality threshold M1; wherein N is less than or equal to the number of antenna ports for transmitting SRS. At this time, the process of the present invention,
the weight information issued by the adjustment data in this step is: and the base station performs Radio Resource Connection (RRC) reconfiguration, switches from a closed-loop transmission mode to an open-loop transmission mode, starts periodic SRS uploading, and calculates the weight of data issuing by adopting the periodic SRS. Thus, the issued data can be weighted by the calculated weight.
Alternatively, the first and second electrodes may be,
the channel quality in this step satisfies the preset channel quality threshold as follows: if RI reported by the UE is greater than N, CQI is greater than or equal to a third channel quality threshold M2, and the high-level transmission mode is configured as an open-loop transmission mode; wherein N is less than or equal to the number of antenna ports for transmitting SRS. At this time, the process of the present invention,
the weight information issued by the adjustment data in this step is: and the base station reconfigures a transmission mode through a high-level signaling and configures the transmission mode into a closed-loop transmission mode, wherein in the closed-loop transmission mode, the base station adopts the PMI reported by the UE as a weight value of the adjusted data issuing. Thus, the issued data can be weighted by the calculated weight.
In this step, when the base station determines, according to the obtained channel quality information, that the channel quality satisfies a preset channel quality threshold, that is, the RI reported by the UE is greater than N, where N is less than or equal to the number of antenna ports on the SRS, the base station performs weighting processing on the issued data by using the PMI reported by the UE as a weight for issuing data.
Through the above processing of the step when the channel quality meets the preset channel quality threshold, when the RI is less than or equal to N, the Modulation and Coding Scheme (MCS) is improved, that is, the spectrum efficiency of the system is improved, thereby improving the system performance.
And when the channel quality does not meet the preset channel quality threshold, namely except the other conditions meeting the preset channel quality threshold, namely when the weight change condition is not met, keeping the current weight acquisition mode.
It should be noted that the first channel quality threshold M, the second channel quality threshold M1, and the third channel quality threshold M2 may be the same, may also be partially the same, or may also be different, and it is clear to those skilled in the art that the specific values thereof depend on the actual application scenario.
It should be noted that, in open-loop transmission, the acquisition of the channel quality information may be obtained by the intelligent base station reporting the aperiodic Channel State Indication (CSI).
The technical scheme provided by the invention breaks through the dependence of the base station on the information reported by the terminal, enables the base station to give full play to the resource advantages of the base station, combines the SRS resource with the information reported by the terminal, and according to the channel quality condition: the RI reported by the terminal intelligently selects the weighted weight when data is issued by combining with the CQI, so that the weight on the base station side better matches the channel, the spectrum efficiency of the system is improved, the system performance is improved, and the user experience is also ensured.
The process of the present invention is described in detail below with reference to specific examples.
In the first embodiment, it is assumed that the UE supports SRS single-antenna port aperiodic reporting, and in this embodiment, N is 1, and the first channel quality threshold M is 7; then, according to the technical solution provided by the present invention, the processing of data by the base station includes:
first, the base station configures the UE to report channel quality information periodically, including RI, PMI, CQI, PTI, and the like.
Then, the base station judges: if the RI reported by the UE is 1 and the CQI is less than the first channel quality threshold M, the base station triggers the aperiodic SRS to be sent, and calculates the weight value of data transmission by adopting the latest reported aperiodic SRS. In the first embodiment, it is assumed that the aperiodic SRS is triggered to be transmitted when the number of NACK reports is greater than a preset trigger threshold N1 within a specified time T, where a value of N1 depends on a block error rate required by a system. The lower the block error rate required by the system is, the smaller the value of N1 is;
and if the RI is more than 1, the base station adopts the PMI reported by the UE as a weight value to carry out weighting processing on the issued data. The implementation of the first embodiment may not initiate switching of the transmission mode of the open-close loop.
And when the channel quality does not meet the preset channel quality threshold, namely the weight change condition is not met, keeping the current weight obtaining mode.
In the second embodiment, it is assumed that the UE supports the aperiodic reporting of the SRS 2 antenna port, and in this embodiment, it is assumed that N is 2 and the first channel quality threshold M is 7; then, according to the technical solution provided by the present invention, the processing of data by the base station includes:
first, the base station configures the UE to report channel quality information periodically, including RI, PMI, CQI, PTI, and the like.
Then, the base station judges: and if the RI reported by the UE is less than or equal to 2 and the CQI is less than a first channel quality threshold M, the base station triggers the non-periodic SRS to be transmitted, and calculates the weight value of data transmission by adopting the non-periodic SRS transmitted recently. The time interval of the non-periodic SRS transmission can be intelligently triggered by the base station according to the channel condition;
and if the RI is more than 2, the base station adopts the PMI reported by the UE to carry out weighting processing on the issued data.
And when the channel quality does not meet the preset channel quality threshold, namely the weight change condition is not met, keeping the current weight obtaining mode.
In the third embodiment, it is assumed that the UE supports SRS single-antenna periodic reporting, and in this embodiment, it is assumed that N is 1, the second channel quality threshold M1 is 8, and the third channel quality threshold M2 is 11; then, according to the technical solution provided by the present invention, the processing of data by the base station includes:
first, the base station configures the UE to report channel quality information periodically, including RI, PMI, CQI, PTI, and the like.
Then, the base station judges: if the RI reported by the UE is 1 and the CQI is less than a second channel quality threshold M1, the base station performs RRC reconfiguration, switches from a closed-loop transmission mode to an open-loop transmission mode, starts periodic SRS uploading, and calculates a weight value of data transmission by adopting the periodic SRS;
if RI is greater than 1, CQI is greater than or equal to a third channel quality threshold M2, and the high-level transmission mode is configured in an open-loop transmission mode, the high level of the base station reconfigures the transmission mode to be configured in a closed-loop transmission mode, and the base station performs weighting processing on the issued data by adopting a PMI reported by UE in the closed-loop transmission mode;
and if the RI is greater than 1, the base station adopts the PMI reported by the UE to carry out weighting processing on the issued data.
And when the channel quality does not meet the preset channel quality threshold, namely the weight change condition is not met, keeping the current weight obtaining mode.
In the fourth embodiment, it is assumed that the UE supports SRS 2 port antenna periodic uplink, and in this embodiment, it is assumed that N is 2, the second channel quality threshold M1 is 8, and the third channel quality threshold M2 is 11; then, according to the technical solution provided by the present invention, the processing of data by the base station includes:
first, the base station configures the UE to report channel quality information periodically, including RI, PMI, CQI, PTI, and the like.
Then, the base station judges: if the RI reported by the UE is less than or equal to 2 and the CQI is less than a second channel quality threshold M1, the base station performs RRC reconfiguration, switches from a closed-loop transmission mode to an open-loop transmission mode, starts periodic SRS uploading, and calculates a weight value of data transmission by adopting the periodic SRS;
if RI is greater than 2, CQI is greater than or equal to a third channel quality threshold M2, and the high-level transmission mode is configured in an open-loop transmission mode, the high level of the base station reconfigures the transmission mode to be configured in a closed-loop transmission mode, and the base station performs weighting processing on the issued data by using the PMI reported by the UE in the closed-loop transmission mode;
and if the RI is more than 2, the base station adopts the PMI reported by the UE to carry out weighting processing on the issued data.
And when the channel quality does not meet the preset channel quality threshold, namely the weight change condition is not met, keeping the current weight obtaining mode.
N in the above embodiments is less than or equal to the number of SRS transmit-upstream antenna ports.
In the above embodiments. Under open-loop transmission, the acquisition of channel quality information can be obtained by the intelligent base station through aperiodic CSI reporting.
The method is that the base station combines the transmission modes of the open loop and the closed loop according to the obtained channel information, and gives the weight information of the adaptive channel intelligently so as to match the channel and improve the throughput of the system.
Fig. 2 is a schematic diagram of a structure of a weight obtaining apparatus according to the present invention, as shown in fig. 2, which at least includes an obtaining module and a processing module, wherein,
an obtaining module, configured to obtain channel quality information;
and the processing module is used for adjusting weight information issued by the data when judging that the channel quality meets a preset channel quality threshold according to the obtained channel quality information.
Wherein, the processing module is specifically configured to:
and when the RI in the obtained channel quality information is less than or equal to N and the CQI in the obtained channel quality information is less than a first channel quality threshold M, triggering the non-periodic SRS to be transmitted, and calculating the weight value of data transmission by adopting the non-periodic SRS which is transmitted recently. Wherein N is less than or equal to the number of antenna ports for transmitting SRS;
when RI in the obtained channel quality information is less than or equal to N and the obtained channel quality information is less than a second channel quality threshold value M1, performing RRC reconfiguration, switching from a closed-loop transmission mode to an open-loop transmission mode, starting periodic SRS uploading, and calculating a weight value of data issuing by adopting the periodic SRS; wherein N is less than or equal to the number of antenna ports for transmitting SRS;
when RI in the obtained channel quality information is greater than N, CQI in the obtained channel quality information is greater than or equal to a third channel quality threshold value M2, and a high-level transmission mode is configured in an open-loop transmission mode, under a reconfigured closed-loop transmission mode, PMI in the obtained channel quality information is adopted as a weight value of the adjusted data issuing; wherein N is less than or equal to the number of antenna ports for transmitting SRS;
and when the RI in the obtained channel quality information is greater than N, the PMI in the obtained channel quality information is adopted as a weight value issued by data.
The processing module is further configured to: and when the channel quality does not meet the preset channel quality threshold, keeping the current weight value acquisition mode.
The processing module is further configured to: and carrying out weighting processing on the issued data by utilizing the calculated weight.
The weight value acquisition device provided by the invention can be arranged in the base station and also can be an independent entity.
The above description is only a preferred example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A method for obtaining a weight value is characterized by comprising the following steps:
the base station periodically acquires channel quality information;
when the base station judges that the channel quality meets a preset channel quality threshold according to the obtained channel quality information, the base station adjusts weight information sent by data;
the channel quality information at least comprises Rank Indication (RI) and Precoding Matrix Indication (PMI) of a channel;
the channel quality information meets the preset channel quality threshold value as follows: the RI obtained is greater than N; wherein N is less than or equal to the number of antenna ports for transmitting SRS;
and the base station adopts the obtained PMI as a weight value issued by the data.
2. The weight obtaining method according to claim 1, wherein the channel quality information further includes a Channel Quality Indicator (CQI).
3. The weight obtaining method according to claim 2, wherein the channel quality threshold is a first channel quality threshold M;
the channel quality meets the preset channel quality threshold value as follows: the obtained RI is less than or equal to N, and the obtained CQI is less than a first channel quality threshold M; wherein N is less than or equal to the number of antenna ports for transmitting SRS;
the weight information issued by the adjustment data is as follows: the base station triggers the non-periodic SRS to be transmitted upwards and adopts the non-periodic SRS which is transmitted recently to calculate the weight value sent down by the data; the time interval of the non-periodic SRS is triggered intelligently by the base station according to the channel condition.
4. The weight obtaining method according to claim 2, wherein the channel quality threshold is a second channel quality threshold M1;
the channel quality meets the preset channel quality threshold value as follows: the obtained RI is less than or equal to N and the obtained CQI is less than a second channel quality threshold M1; wherein N is less than or equal to the number of antenna ports for transmitting SRS;
the weight information issued by the adjustment data is as follows: and the base station performs radio resource connection RRC reconfiguration, switches from a closed-loop transmission mode to an open-loop transmission mode, starts periodic SRS uploading, and calculates a weight value sent by data by adopting the periodic SRS.
5. The weight obtaining method according to claim 2, wherein the channel quality threshold is a third channel quality threshold M2;
the channel quality meets the preset channel quality threshold value as follows: the obtained RI is greater than N, the obtained CQI is greater than or equal to a third channel quality threshold M2, and the high-level transmission mode is configured for an open-loop transmission mode; wherein N is less than or equal to the number of antenna ports for transmitting SRS;
the weight information issued by the adjustment data is as follows: and the high layer of the base station reconfigures a transmission mode and configures the transmission mode into a closed-loop transmission mode, and the base station adopts the obtained PMI as a weight value of data issuing in the closed-loop transmission mode.
6. The weight obtaining method according to any one of claims 1 to 5, further comprising: and carrying out weighting processing on the issued data by using the calculated weight.
7. A weight value obtaining device is characterized by comprising an obtaining module and a processing module, wherein,
an obtaining module, configured to obtain channel quality information;
the processing module is used for adjusting weight information issued by data when judging that the channel quality meets a preset channel quality threshold according to the obtained channel quality information; and when the RI in the obtained channel quality information is greater than N, the PMI in the obtained channel quality information is adopted as a weight value of data transmission, wherein N is less than or equal to the number of antenna ports on which the SRS is transmitted.
8. The weight obtaining device according to claim 7, wherein the channel quality information further includes a channel quality indicator CQI, and the processing module is specifically configured to:
when RI in the obtained channel quality information is less than or equal to N and CQI in the obtained channel quality information is less than a first channel quality threshold M, triggering the non-periodic SRS to be transmitted, and calculating a weight value issued by data by adopting the non-periodic SRS which is transmitted recently;
when RI in the obtained channel quality information is less than or equal to N and CQI in the obtained channel quality information is less than a second channel quality threshold value M1, performing RRC reconfiguration, switching from a closed-loop transmission mode to an open-loop transmission mode, starting periodic SRS uploading, and calculating a weight value of data issuing by adopting the periodic SRS;
and when the RI in the obtained channel quality information is greater than N, the CQI in the obtained channel quality information is greater than or equal to a third channel quality threshold value M2, and the high-level transmission mode is configured in an open-loop transmission mode, under the reconfigured closed-loop transmission mode, the PMI in the obtained channel quality information is adopted as a weight value issued by data.
9. The weight obtaining device according to claim 7, wherein the processing module is further configured to: and when the obtained channel quality does not meet the preset channel quality threshold, keeping the current weight value obtaining mode.
10. The weight obtaining device according to any of claims 7-9, wherein the processing module is further configured to: and carrying out weighting processing on the issued data by using the calculated weight.
11. The weight obtaining device according to claim 7, wherein the weight obtaining device is disposed in a base station or is an independent entity.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510629380.XA CN106559123B (en) | 2015-09-28 | 2015-09-28 | Weight value obtaining method and device |
| PCT/CN2016/081604 WO2017054457A1 (en) | 2015-09-28 | 2016-05-10 | Method and device for acquiring weight |
| JP2018515942A JP6553292B2 (en) | 2015-09-28 | 2016-05-10 | Weight value acquisition method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510629380.XA CN106559123B (en) | 2015-09-28 | 2015-09-28 | Weight value obtaining method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106559123A CN106559123A (en) | 2017-04-05 |
| CN106559123B true CN106559123B (en) | 2021-10-19 |
Family
ID=58415825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510629380.XA Active CN106559123B (en) | 2015-09-28 | 2015-09-28 | Weight value obtaining method and device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6553292B2 (en) |
| CN (1) | CN106559123B (en) |
| WO (1) | WO2017054457A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111615200B (en) * | 2020-04-10 | 2023-04-28 | 洛阳理工学院 | Unmanned aerial vehicle auxiliary communication resource allocation method for Hybrid NOMA network |
| CN113645001B (en) * | 2021-08-11 | 2022-06-21 | 北京邮电大学 | SRS period configuration method for time-varying channel under high-speed mobile scene |
| CN113993173B (en) * | 2021-10-25 | 2023-08-29 | 京信网络***股份有限公司 | Dynamic carrier switching method, device, base station and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826934A (en) * | 2009-03-02 | 2010-09-08 | 株式会社东芝 | Base station, terminal and wireless communication system |
| CN102546111A (en) * | 2012-01-09 | 2012-07-04 | 大唐移动通信设备有限公司 | CQI (Channel Quality Indicator) determining method and device thereof |
| CN103701512A (en) * | 2013-12-16 | 2014-04-02 | 北京北方烽火科技有限公司 | Method and device for determining downlink beam forming weight vector |
| CN103905101A (en) * | 2012-12-27 | 2014-07-02 | 中兴通讯股份有限公司 | Method of determining downlink precoding granularity in LTE (Long Term Evolution) system and eNodeB |
| CN104396296A (en) * | 2013-06-04 | 2015-03-04 | 华为技术有限公司 | Data transmission method and device, and user equipment |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232690B (en) * | 2007-01-23 | 2012-03-21 | 华为技术有限公司 | Method and system for synthesis applying two-way channel quality indication in TDD system |
| JP5103357B2 (en) * | 2008-11-04 | 2012-12-19 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile terminal apparatus and radio base station apparatus |
| JP5001314B2 (en) * | 2009-02-27 | 2012-08-15 | 株式会社エヌ・ティ・ティ・ドコモ | Radio base station apparatus and modulation / coding method selection method |
| US20110292823A1 (en) * | 2010-05-27 | 2011-12-01 | Qualcomm Incorporated | Sounding reference signal (srs) in heterogeneous network (hetnet) with time division multiplexing (tdm) partitioning |
| CN101945441B (en) * | 2010-09-15 | 2013-04-24 | 华为技术有限公司 | Multiple-cell UE dispatching method, device and system |
| JP5777092B2 (en) * | 2011-06-10 | 2015-09-09 | ソフトバンク株式会社 | Wireless communication device, wireless transmission system, and wireless transmission method |
| CN104253674B (en) * | 2013-06-27 | 2017-12-29 | 华为技术有限公司 | Feed back CSI method, dispatch UE method, UE and base station |
| US9544122B2 (en) * | 2013-11-18 | 2017-01-10 | Qualcomm Incorporated | Techniques for outer loop management in a multiple output system |
-
2015
- 2015-09-28 CN CN201510629380.XA patent/CN106559123B/en active Active
-
2016
- 2016-05-10 JP JP2018515942A patent/JP6553292B2/en active Active
- 2016-05-10 WO PCT/CN2016/081604 patent/WO2017054457A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826934A (en) * | 2009-03-02 | 2010-09-08 | 株式会社东芝 | Base station, terminal and wireless communication system |
| CN102546111A (en) * | 2012-01-09 | 2012-07-04 | 大唐移动通信设备有限公司 | CQI (Channel Quality Indicator) determining method and device thereof |
| CN103905101A (en) * | 2012-12-27 | 2014-07-02 | 中兴通讯股份有限公司 | Method of determining downlink precoding granularity in LTE (Long Term Evolution) system and eNodeB |
| CN104396296A (en) * | 2013-06-04 | 2015-03-04 | 华为技术有限公司 | Data transmission method and device, and user equipment |
| CN103701512A (en) * | 2013-12-16 | 2014-04-02 | 北京北方烽火科技有限公司 | Method and device for determining downlink beam forming weight vector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018534840A (en) | 2018-11-22 |
| JP6553292B2 (en) | 2019-07-31 |
| CN106559123A (en) | 2017-04-05 |
| WO2017054457A1 (en) | 2017-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102107705B1 (en) | Method and apparatus for reporting channel state information in a wireless communication system | |
| KR102207082B1 (en) | Method for measuring and reporting channel state information in wireless communication system and apparatus therefor | |
| KR102343281B1 (en) | Method and apparatus for measuring and reporting channel state information in a wireless communication system | |
| JP6263827B2 (en) | Periodic channel state information report for time division duplex (TDD) carrier aggregation system | |
| CN110831196B (en) | CSI report configuration method, terminal equipment and network equipment | |
| CN1902970B (en) | Network controlled channel information reporting | |
| KR101506673B1 (en) | Method for reporting channel state information and device thereof | |
| US10601480B2 (en) | Systems and methods for adaptively restricting CSI reporting in multi antenna wireless communications systems utilizing unused bit resources | |
| EP2571316A1 (en) | Downlink transmission method and base station used in multiple input multiple output system | |
| CN102946263B (en) | Different multiple input multiple output (MIMO) mode switching method and device for down-load mode of long term evolution (LTE) system | |
| EP2297874B1 (en) | Including feedback information regarding an individual subband of a wireless channel | |
| EP3550906B1 (en) | Transmission method, base station, and terminal for dynamically adjusting beam collection | |
| US9143959B2 (en) | Method, apparatus and system for optimizing inter-cell interference coordination | |
| WO2020164638A1 (en) | Antenna parameter adjustment method and related apparatus | |
| WO2012151988A1 (en) | Multi-point channel information feedback method, system and terminal | |
| EP2206381A2 (en) | Rank adaptation for an open loop multi-antenna mode of wireless communication | |
| EP2478723B1 (en) | Apparatuses and methods for coordinated multipoint transmission using compressed feedback information | |
| KR20210120046A (en) | Channel state estimation and reporting method in wireless communication | |
| CN106559123B (en) | Weight value obtaining method and device | |
| KR20150121185A (en) | Mobile station, base station, and communication control method | |
| CN106559165B (en) | Method and equipment for feeding back channel state information | |
| CN102064867A (en) | Method and device for switching multi-antenna transmission modes | |
| EP3454490B1 (en) | Method for determining supported data stream transmission rate and user equipment | |
| CN102457361B (en) | Method supporting multiple transmitting modes and base station | |
| CN102098138A (en) | Method, device and system for processing feedback information of channel state |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |