CN105322992A - Base station antenna selection method, base station antenna selection apparatus, multi-antenna channel self-adaptation method, multi-antenna channel self-adaptation apparatus, and base station - Google Patents
Base station antenna selection method, base station antenna selection apparatus, multi-antenna channel self-adaptation method, multi-antenna channel self-adaptation apparatus, and base station Download PDFInfo
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Abstract
The present invention discloses a base station antenna selection method, a base station antenna selection apparatus, a multi-antenna channel self-adaptation method, a multi-antenna channel self-adaptation apparatus, and a base station. According to the invention, the antenna covering capability is ensured and the multi-stream data transmission performance is improved at the same time. The base station antenna selection method includes: N antenna channels satisfying a preset interval condition are selected from base station antennas for performing multi-stream beam forming for a terminal when the multi-stream data transmission is required by the terminal. The multi-antenna channel self-adaptation method includes the steps as follows: transmitting CSI-RS measurement instruction information to the terminal; confirming that the terminal supports the multi-stream data transmission, and selecting N antennal channels satisfying the preset interval condition for performing multi-stream beam forming for the terminal when the terminal performs measurement according to a CSI-RS with four ports; reconfiguring the terminal for performing measurement according to the CSI-RS with four ports if the terminal performs measurement according to a CSI-RS with eight ports, and selecting N antenna channels satisfying the preset interval condition for performing multi-stream beam forming for the terminal according to second channel information fed back by the terminal.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of antenna for base station and select and multiple antennas channel adaptive method, device and base station.
Background technology
Reception and the transmission that 8 passage antennas carry out network side data is have employed in existing TD-LTE (TimeDivisionLongTermEvolution, timesharing Long Term Evolution) network.The design feature of 8 passage antennas is cross polarization, as shown in Figure 1, poliarizing antenna between spacing little (F-band is 0.5 times of wavelength, and D frequency range is 0.7 times of wavelength), be suitable for carrying out wave beam forming, can effectively improve MPS process ability and cell throughout.Theory analysis and existing network application show, 8 passage antennas can obtain good single current and double-current figuration performance.
At LTERelease9 dual-stream beamforming (TransmissionMode8, TM8) on basis, be the descending figuration transmission mode TM9 (TransmissionMode9 defining more high-order in LTE-A standard, transmission mode 9), the highest 8 stream wave beam formings can be supported in theory, but consider the quantitative limitation of terminal antenna number, in future network, wave beam formings can be flowed with TM9 technical support the highest 4.As shown in Figure 2, be multi-flow beam forming evolution schematic diagram.
But when existing 8 passage antennas are used for 4 stream wave beam forming, base station needs the CSI-RS (ChannelStatusInformationReferenceSignal of transmission 8 port, channel state information reference signals) pilot signal estimates channel with accessory terminal, and channel information (is comprised PMI (PrecodingMatrixIndicator, pre-coding matrix indicates), RI (RankIndication, order indicates), CQI (ChannelQualityIndicator, CQI)) feed back to base station, multi-flow beam forming is carried out according to the channel information of terminal to report in base station.
But under 8 passage antenna applications scenes, multithread (3 stream/4 stream) wave beam forming requires harsh to channel circumstance, ratio is lower, is therefore difficult to application.Mainly because the antenna element spacing of 8 passage antennas is little, cause the correlation of antenna high, be unfavorable for that multi-stream data transmits.The antenna changing spacing large can improve multi-stream data transmission performance, but the cost changing antenna is on the one hand too high, and on the other hand, antenna must possess good covering power, and Large space antenna cannot meet network coverage requirement.
Summary of the invention
The embodiment of the present invention provides a kind of antenna for base station to select and multiple antennas channel adaptive method, device and base station, in order to while guarantee antenna cover ability, improves multi-stream data transmission performance.
A kind of antenna for base station system of selection, comprising:
When needs carry out multi-stream data transmission for terminal, from antenna for base station, the N number of antenna channels meeting preset pitch condition is selected to be that described terminal carries out multi-flow beam forming; Wherein, N be greater than 2 integer.
The embodiment of the present invention provides a kind of multiple antennas channel adaptive method, comprising:
Measure indication information to terminal transmitting channel state information reference signals CSI-RS, described CSI-RS measurement indication information is used to indicate described terminal and measures according to 4 port CSI-RS of configuration and/or 8 port CSI-RS;
Determine that described terminal supports multi-stream data transmission according to the first channel information of described terminal feedback, if and described terminal is measured according to 4 port CSI-RS, then utilize above-mentioned antenna for base station system of selection from multiple antennas passage, select N number of antenna channels to be that described terminal carries out multi-flow beam forming according to the first channel information of described terminal feedback; If described terminal is measured according to 8 port CSI-RS, then reconfigure described terminal to measure according to 4 port CSI-RS, and the antenna for base station system of selection above-mentioned according to the second channel Information Pull of described terminal feedback selects N number of antenna channels to be that described terminal carries out multi-flow beam forming from multiple antennas passage; Wherein, N be greater than 2 integer.
The embodiment of the present invention provides a kind of antenna for base station choice device, comprising:
Selected cell, for when needs carry out multi-stream data transmission for terminal, selects the N number of antenna channels meeting preset pitch condition to be that described terminal carries out multi-flow beam forming from antenna for base station; Wherein, N be greater than 2 integer.
The embodiment of the present invention provides a kind of multiple antennas channel adaptive device, comprising:
Transmitting element, for measuring indication information to terminal transmitting channel state information reference signals CSI-RS, described CSI-RS measurement indication information is used to indicate described terminal and measures according to 4 port CSI-RS of configuration and/or 8 port CSI-RS;
Processing unit, for determining that according to the first channel information of described terminal feedback described terminal supports multi-stream data transmission, if and described terminal is measured according to 4 port CSI-RS, then utilize above-mentioned antenna for base station system of selection from multiple antennas passage, select N number of antenna channels to be that described terminal carries out multi-flow beam forming according to the first channel information of described terminal feedback; If described terminal is measured according to 8 port CSI-RS, then reconfigure described terminal to measure according to 4 port CSI-RS, and the antenna for base station system of selection above-mentioned according to the second channel Information Pull of described terminal feedback selects N number of antenna channels to be that described terminal carries out multi-flow beam forming from multiple antennas passage; Wherein, N be greater than 2 integer.
The embodiment of the present invention provides a kind of base station, comprises above-mentioned utilizing above-mentioned antenna for base station choice device and/or multiple antennas channel adaptive device.
The antenna for base station that the embodiment of the present invention provides is selected and multiple antennas channel adaptive method, device and base station, base station is when needs carry out multi-stream data transmission for terminal, from antenna for base station, select the N number of antenna channels meeting preset pitch condition to be that described terminal carries out multi-flow beam forming, because it is that terminal carries out multi-stream data transmission based on the existing sky N number of passage of line options, thus, multi-flow beam forming is realized under the prerequisite without the need to changing antenna, on the other hand, because the spacing between the antenna channels selected meets preset pitch condition, thus the correlation that can reduce between antenna element, improve the performance of multi-stream data transmission.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is in prior art, 8 passage antenna cross-polarization schematic diagrames;
Fig. 2 is in prior art, multi-flow beam forming evolution schematic diagram;
Fig. 3 is in the embodiment of the present invention, the implementing procedure schematic diagram of multiple antennas channel adaptive method;
Fig. 4 is in the embodiment of the present invention, the configuration mode schematic diagram of the first CSI-RS;
Fig. 5 is in the embodiment of the present invention, when base station configures 4 port CSI-RS measurement, and the implementing procedure schematic diagram of multiple antennas channel adaptive method;
Fig. 6 is during the invention process is converged, when base station configures 8 port CSI-RS measurement, and the implementing procedure schematic diagram of multiple antennas channel adaptive method;
Fig. 7 is in the embodiment of the present invention, the configuration mode schematic diagram of the second CSI-RS;
Fig. 8 is in the embodiment of the present invention, when base station configures 4 port CSI-RS measurements and 8 port CSI-RS measurement, and the implementing procedure schematic diagram of multiple antennas channel adaptive method;
Fig. 9 is in the embodiment of the present invention, the structural representation of multiple antennas channel adaptive device.
Embodiment
In order under the prerequisite not changing antenna, realize multi-stream data transmission, and improve the performance of multi-stream data transmission, embodiments provide a kind of antenna for base station and select and multiple antennas channel adaptive method, device and base station.
Below in conjunction with Figure of description, the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein is only for instruction and explanation of the present invention, be not intended to limit the present invention, and when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
The embodiment of the present invention is applicable to multiaerial system, is particularly useful for 8 antenna systems of TD-LTE.
During concrete enforcement, when needs carry out multi-stream data transmission for terminal, the N number of antenna channels selecting to meet preset pitch condition from antenna for base station carries out multi-flow beam forming for this terminal, wherein, N be greater than 2 integer.And if be 8 antenna systems, then N should be no more than 8.For convenience of explanation, be described for 8 antenna systems below.
For 8 antenna systems, in order to reduce correlation when multi-stream data transmits between each antenna element, improve the performance of multi-stream data transmission, in the embodiment of the present invention, the antenna channels that spacing in 8 antennas can be selected to meet preset pitch condition is transmitted for multi-stream data.As shown in Figure 2, if for terminal carries out list/double-flow data transmission, whole 8 antenna elements can be used to carry out list/dual-stream beamforming, if need for terminal carry out 3 Stream Data Transmissions or 4 Stream Data Transmission time, 4 antenna elements meeting preset pitch condition can be selected to carry out 3/4 stream wave beam forming.Such as, can be, but not limited to use be numbered 1,2,7,8 four antenna element and carry out 3 Stream Data Transmissions or 4 Stream Data Transmissions.Like this, antenna element spacing is 2.1 times of wavelength from 0.7 times of wavelength spread, thus decrease for multi-stream data transmission antenna element between correlation, improve multi-stream data transmission performance.4 middle antenna channels still normally send the list/double-current data of CRS (CommonReferenceSignal, public reference signal) and other user terminals, keep list/double-flow data transmission performance.That is, antenna physical port one ~ 8 are for list/dual-stream beamforming (TM7, TM8), TM2/3, control channel; Antenna physical port one/2/7/8 is for multi-flow beam forming (TM9).
It should be noted that, using the antenna element being numbered 1,2,7,8 to carry out multi-stream data transmission is only embodiment of the present invention one preferably execution mode, when specifically implementing, the antenna element meeting preset pitch condition can be adopted to carry out multi-stream data transmission.Such as, for D frequency range, preset pitch condition can be, but not limited to be set as 1.4 times of wavelength or 2.1 times of wavelength, or for F-band, preset pitch condition can be, but not limited to be set as single times of wavelength or 1.5 times of wavelength.
Based on the above-mentioned antenna for base station system of selection provided, as shown in Figure 3, embodiments provide a kind of multiple antennas channel adaptive method, comprise the following steps:
S31, base station send CSI-RS to terminal and measure indication information.
Wherein, CSI-RS measures indication information and is used to indicate 4 port CSI-RS that terminal configures according to base station and/or 8 port CSI-RS and carries out CSI-RS measurement.
Time initial, base station is the terminal unified configuration CSI-RS metering system in coverage, and terminal carries out CSI-RS measurement according to the configuration of base station, and to base station feedback measurement result.Meanwhile, base station can use SRS (detection reference signal) to carry out list/dual-stream beamforming, and the mode based on CSI-RS and code book feedback also can be used to carry out list/dual-stream beamforming.
During concrete enforcement, base station can be measured according to 4 port CSI-RS by configurating terminal, also can measure according to 8 port CSI-RS by configurating terminal, can also measure according to 4 port CSI-RS and 8 port CSI-RS by configurating terminal.Wherein, base station can be measured according to 4 port CSI-RS and 8 port CSI-RS by configurating terminal in such a way: base station according to predetermined period configurating terminal hocket 4 port CSI-RS measure and 8 port CSI-RS measure.Such as, the cycle of two kinds of CSI-RS is respectively 20ms, alternately occurs once, as shown in Figure 4 every 10ms.
Multi-stream data transmission is supported according to the first channel information determination terminal of terminal feedback in S32, base station, if and terminal is measured according to 4 port CSI-RS, then from multiple antennas passage, the N number of antenna channels meeting preset pitch condition is selected to be that described terminal carries out multi-flow beam forming according to the first channel information of terminal feedback; If terminal is measured according to 8 port CSI-RS, then reconfigure terminal to measure according to 4 port CSI-RS, and from multiple antennas passage, select the N number of antenna channels meeting preset pitch condition to be that terminal carries out multi-flow beam forming according to the second channel information of terminal feedback.
During concrete enforcement, channel information comprises RI and CQI, and in step S32, according to following steps determination any terminal, whether base station can support that multi-stream data transmits:
Step one, base station check whether the RI of terminal feedback is greater than preset value, if so, perform step 2, otherwise, perform step 4.
Such as, this preset value can be, but not limited to be set to 2.
Step 2, base station determine whether the CQI of terminal feedback is greater than predetermined threshold value, if so, perform step 3, otherwise perform step 4.
Step 3, determine terminal support multi-stream data transmission.
Step 4, determine that terminal does not support that multi-stream data transmits.
During concrete enforcement, after determining that certain terminal supports multi-stream data transmission, if this terminal is measured according to 4 port CSI-RS, then the N number of antenna channels selecting to meet preset pitch condition according to the first channel information of this terminal feedback from multiple antennas passage carries out multi-flow beam forming for this terminal; If this terminal is measured according to 8 port CSI-RS, then reconfigure this terminal to measure according to 4 port CSI-RS, and from multiple antennas passage, select the N number of antenna channels meeting preset pitch condition to be that terminal carries out multi-flow beam forming according to the second channel information of this terminal feedback.
During concrete enforcement, for this terminal, when carrying out multi-stream data transmission, because the N number of antenna channels that only used in 8 antenna channels carries out transfer of data, the antenna channels quantity minimizing of transmission data may cause data transmission utilization measure to lose.Therefore, in order to make up the loss of the data transmission utilization measure brought because the antenna channels quantity for transmitting data reduces, preferably, in the embodiment of the present invention, base station, when for this terminal transmission data, first can judge currently whether there is the PRB (Physical Resource Block) not being assigned with use, if existed, then base station can utilize these PRB not being assigned with use to be this terminal transmission data simultaneously, like this can lifting data transmission utilization measure.
During concrete enforcement, base station is using after multi-stream data is transmitted as this terminal transmission data (i.e. base station N number of antenna channels of meeting preset pitch condition in selection from multiple antennas passage carry out multi-flow beam forming for this terminal), whether the spectrum efficiency can also determining this terminal is higher than the spectrum efficiency of this terminal when using list/dual-stream beamforming, if not, then return to normal mode, for this terminal uses whole 8 antennas to carry out list/dual-stream beamforming, namely base station uses whole 8 antenna channels to be this terminal transmission data.Wherein, the spectrum efficiency that this terminal is corresponding the message transmission rate corresponding according to this terminal can be determined with the ratio of occupied bandwidth in base station.
Embodiment for a better understanding of the present invention, is described respectively to above-mentioned three kinds of CSI-RS metering systems below.
Execution mode one, base station configurating terminal are measured according to 4 port CSI-RS.
As shown in Figure 5, be the implementing procedure schematic diagram of corresponding multiple antennas channel adaptive method, can comprise the following steps:
S51, allocating cell, base station level 4 port CSI-RS measure.
Concrete, allocating cell, base station level 4 port CSI-RS measures, and the terminal in instruction coverage is measured according to 4 port CSI-RS.Base station uses SRS to carry out single dual-stream beamforming simultaneously.
S52, terminal are carried out 4 port CSI-RS according to base station configuration and are measured.
During concrete enforcement, terminal specifies according to agreement, measures according to 4 port CSI-RS.
S53, terminal are to base station feedback channel information.
During concrete enforcement, the channel information of terminal feedback comprises PMI, CQI and RI.
S54, for each terminal, base station judges whether this terminal supports that multi-stream data transmits, and if so, perform step S55, otherwise flow process terminates.
During concrete enforcement, for each terminal, base station can check whether the RI of this terminal feedback is greater than preset value, and determine whether the CQI of this terminal feedback is greater than predetermined threshold value, if the RI of this terminal feedback is greater than preset value and the CQI of this terminal feedback is greater than predetermined threshold value, then base station determines that this terminal supports multi-stream data transmission.
S55, the terminal transmitted for support multi-stream data, base station selected N number of antenna channels is carried out N and is flowed wave beam forming.
During concrete enforcement, for the terminal supporting multi-stream data transmission, it is while this terminal carries out multi-stream data transmission that N stream wave beam forming is carried out in the N number of antenna channels of selection in base station, can also determine currently whether can have the data transmission resources be not assigned with in distribute data transfer resource, if had, the data transmission resources that can simultaneously utilize this not to be assigned with is this terminal transmission data, with lifting data transmission utilization measure, and the power loss that the antenna channels quantity compensated owing to transmitting data reduces and brings.
S56, for the terminal using multi-stream data transmission means transmission data, spectrum efficiency when whether the spectrum efficiency that base station judges this terminal transmits data higher than list/double-flow data transmission mode, if so, flow process terminates, and if not, performs step S57.
S57, do not transmit the terminal of data higher than list/double-flow data transmission mode for spectrum efficiency, return back to normal mode.
During concrete enforcement, do not transmit the terminal of data for spectrum efficiency higher than list/double-flow data transmission mode, base station stops using multi-stream data transmission means to transmit data, and uses whole antenna channels to carry out transfer of data for this terminal.
Execution mode two, base station configurating terminal are measured according to 8 port CSI-RS
As shown in Figure 6, be the implementing procedure schematic diagram of corresponding multiple antennas channel adaptive method, can comprise the following steps:
S61, allocating cell, base station level 8 port CSI-RS measure.
During concrete enforcement, allocating cell, base station level 8 port CSI-RS, indicating terminal measures CSI-RS.Meanwhile, base station can use SRS to carry out single dual-stream beamforming, and the mode based on CSI-RS and code book feedback also can be used to carry out figuration.
S62, terminal are carried out 8 port CSI-RS according to base station configuration and are measured.
Concrete, terminal specifies according to agreement, measures according to 8 port CSI-RS.
S63, terminal are to base station feedback first channel information.
During concrete enforcement, the first channel information of terminal feedback comprises PMI, CQI and RI.
S64, for each terminal, base station judges whether this terminal supports that multi-stream data transmits, and if so, perform step S65, otherwise flow process terminates.
During concrete enforcement, for each terminal, base station can check whether the RI of this terminal feedback is greater than preset value, and determine whether the CQI of this terminal feedback is greater than predetermined threshold value, if the RI of this terminal feedback is greater than preset value and the CQI of this terminal feedback is greater than predetermined threshold value, then base station determines that this terminal supports multi-stream data transmission.
S65, the terminal transmitted for support multi-stream data, base station reconfigures this terminal and measures according to 4 port CSI-RS.
During concrete enforcement, base station can be passed through the CSI-RS-Config field configuration terminal that RRC (wireless heterogeneous networks) reshuffles signaling and measure according to 4 port CSI-RS.Concrete, as shown in Figure 7, be the configuration mode schematic diagram of CSI-RS, 4 port CSI-RS are nested in the CSI-RS of 8 ports, the physical port 1,2,7,8 of antenna logic port 0,1,2,3 respective antenna.It should be noted that, here only for illustrating, and being not used in limitation of the invention, when specifically implementing, the antenna logic port that the antenna can selecting to meet preset pitch condition is corresponding.
S66, terminal are carried out 4 port CSI-RS according to base station configuration and are measured.
S67, terminal are to base station feedback second channel information.
During concrete enforcement, the second channel information of terminal feedback comprises PMI, CQI and RI.
S68, base station, according to the second channel information of terminal feedback, are selected N number of antenna channels to carry out N and are flowed wave beam forming.
During concrete enforcement, for the terminal supporting multi-stream data transmission, it is while this terminal carries out multi-stream data transmission that N stream wave beam forming is carried out in the N number of antenna channels of selection in base station, can also determine currently whether can have the data transmission resources be not assigned with in distribute data transfer resource, if had, the data transmission resources that can simultaneously utilize this not to be assigned with is this terminal transmission data, with lifting data transmission utilization measure, and the power loss that the antenna channels quantity compensated owing to transmitting data reduces and brings.
S69, for the terminal using multi-stream data transmission means transmission data, spectrum efficiency when whether the spectrum efficiency that base station judges this terminal transmits data higher than list/double-flow data transmission mode, if so, flow process terminates, and if not, performs step S610.
S610, do not transmit the terminal of data higher than list/double-flow data transmission mode for spectrum efficiency, return back to normal mode.
During concrete enforcement, do not transmit the terminal of data for spectrum efficiency higher than list/double-flow data transmission mode, base station stops using multi-stream data transmission means to transmit data, and uses whole antenna channels to carry out transfer of data for this terminal.
Execution mode three, base station configurating terminal are measured according to the 8 port CSI-RS replaced and 4 port CSI-RS.
As shown in Figure 8, be the implementing procedure schematic diagram of corresponding multiple antennas channel adaptive method, can comprise the following steps:
The cell-level 8 port CSI-RS that S81, base station configuration cycle replace and 4 port CSI-RS measures.
During concrete enforcement, cell-level 8 port that base station configuration cycle replaces and 4 port CSI-RS, the such as cycle of two kinds of CSI-RS is respectively 20ms, alternately occurs once, as shown in Figure 4 every 10ms; Indicating terminal measures 8 port CSI-RS; Sounding signal (SRS) can be used to carry out single dual-stream beamforming, the mode based on CSI-RS and code book feedback also can be used to carry out figuration.
S82, terminal carry out CSI-RS measurement according to base station configuration.
During concrete enforcement, terminal specifies according to agreement, when configuring 8 port CSI-RS measurement in base station, measures according to 8 port CSI-RS, when configuring 4 port CSI-RS measurement in base station, measures according to 4 port CSI-RS.
S83, terminal are to base station feedback first channel information.
During concrete enforcement, the first channel information of terminal feedback comprises PMI, CQI and RI.
S84, for each terminal, base station judges whether this terminal supports that multi-stream data transmits, and if so, perform step S85, otherwise flow process terminates.
During concrete enforcement, for each terminal, base station can check whether the RI of this terminal feedback is greater than preset value, and determine whether the CQI of this terminal feedback is greater than predetermined threshold value, if the RI of this terminal feedback is greater than preset value and the CQI of this terminal feedback is greater than predetermined threshold value, then base station determines that this terminal supports multi-stream data transmission.
S85, the terminal transmitted for support multi-stream data, base station reconfigures this terminal and measures according to 4 port CSI-RS.
During concrete enforcement, base station can be passed through the CSI-RS-Config field configuration terminal that RRC (wireless heterogeneous networks) reshuffles signaling and measure according to 4 port CSI-RS.Concrete, as shown in Figure 4,4 port CSI-RS are together with the CSI-RS time division multiplexing of 8 ports.
S86, terminal are carried out 4 port CSI-RS according to base station configuration and are measured.
S87, terminal are to base station feedback second channel information.
During concrete enforcement, the second channel information of terminal feedback comprises PMI, CQI and RI.
S88, base station, according to the second channel information of terminal feedback, are selected N number of antenna channels to carry out N and are flowed wave beam forming.
During concrete enforcement, for the terminal supporting multi-stream data transmission, it is while this terminal carries out multi-stream data transmission that N stream wave beam forming is carried out in the N number of antenna channels of selection in base station, can also determine currently whether can have the data transmission resources be not assigned with in distribute data transfer resource, if had, the data transmission resources that can simultaneously utilize this not to be assigned with is this terminal transmission data, with lifting data transmission utilization measure, and the power loss that the antenna channels quantity compensated owing to transmitting data reduces and brings.
S89, for the terminal using multi-stream data transmission means transmission data, spectrum efficiency when whether the spectrum efficiency that base station judges this terminal transmits data higher than list/double-flow data transmission mode, if so, flow process terminates, and if not, performs step S810.
S810, do not transmit the terminal of data higher than list/double-flow data transmission mode for spectrum efficiency, return back to normal mode.
During concrete enforcement, do not transmit the terminal of data for spectrum efficiency higher than list/double-flow data transmission mode, base station stops using multi-stream data transmission means to transmit data, and uses whole antenna channels to carry out transfer of data for this terminal.
It should be noted that, in the embodiment of the present invention, when base station is that terminal carries out multi-stream data transmission, that is multi-flow beam forming is carried out for this terminal in base station.
The antenna for base station that the embodiment of the present invention provides is selected and multiple antennas channel adaptive method, base station is when needs carry out multi-stream data transmission for terminal, from multiple antennas passage, select the N number of antenna channels meeting preset pitch condition to be that terminal carries out multi-flow beam forming, thus, multi-flow beam forming is realized under the prerequisite without the need to changing antenna, for terminal carries out multi-stream data transmission, because the spacing between the antenna channels selected meets preset pitch condition, thus the correlation that can reduce between antenna element, improve the performance of multi-stream data transmission.
Based on same inventive concept, a kind of antenna for base station choice device and multiple antennas channel adaptive device and base station is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to said apparatus and equipment is similar to multiple antennas channel adaptive method, therefore the enforcement of said apparatus and equipment see the enforcement of method, can repeat part and repeats no more.
During concrete enforcement, the antenna for base station choice device that the embodiment of the present invention provides, can selected cell be comprised, for when needs carry out multi-stream data transmission for terminal, from antenna for base station, select the N number of antenna channels meeting preset pitch condition to be that described terminal carries out multi-flow beam forming; Wherein, N be greater than 2 integer.Wherein, antenna for base station can comprise 8 antenna channels, if when multi-stream data is transmitted as 3 Stream Data Transmissions or 4 Stream Data Transmission, selected cell is used for from antenna for base station, select 4 antenna channels meeting preset pitch condition to be that described terminal carries out multi-flow beam forming.
As shown in Figure 9, be the structural representation of the multiple antennas channel adaptive device that the embodiment of the present invention provides, comprise:
Transmitting element 91, for measuring indication information to terminal transmitting channel state information reference signals CSI-RS, described CSI-RS measurement indication information is used to indicate described terminal and measures according to 4 port CSI-RS of configuration and/or 8 port CSI-RS;
Processing unit 92, for determining that according to the first channel information of described terminal feedback described terminal supports multi-stream data transmission, if and described terminal is measured according to 4 port CSI-RS, then from multiple antennas passage, the N number of antenna channels meeting preset pitch condition is selected to be that described terminal carries out multi-flow beam forming according to the first channel information of described terminal feedback; If described terminal is measured according to 8 port CSI-RS, then reconfigure described terminal to measure according to 4 port CSI-RS, and from multiple antennas passage, select the N number of antenna channels meeting preset pitch condition to be that described terminal carries out multi-flow beam forming according to the second channel information of described terminal feedback; Wherein, N be greater than 2 integer.
During concrete enforcement, the multiple antennas channel adaptive device that the embodiment of the present invention provides can also comprise dispensing unit, measures according to 4 port CSI-RS and 8 port CSI-RS for configuring described terminal in accordance with the following methods: according to predetermined period configure described terminal hocket 4 port CSI-RS measure and 8 port CSI-RS measure.
During concrete enforcement, described channel information comprises order instruction RI and channel quality indicator CQI; Described processing unit 92, for checking whether described RI is greater than preset value; And determine whether described CQI is greater than predetermined threshold value; If described RI is greater than preset value and described CQI is greater than predetermined threshold value, then determine that terminal supports multi-stream data transmission.
During concrete enforcement, the multiple antennas channel adaptive device that the embodiment of the present invention provides can also comprise: wave beam forming unit, for while send CSI-RS measurement indication information to terminal, carries out list/dual-stream beamforming for described terminal; And when determining unit determines the spectrum efficiency using the spectrum efficiency of described terminal after multi-flow beam forming not higher than described terminal in time using list/dual-stream beamforming, stop using multi-flow beam forming and use whole antenna channels to carry out transfer of data; Determining unit, for being after described terminal carries out multi-flow beam forming in the N number of antenna channels selecting to meet preset pitch condition from multiple antennas passage, after determining to use multi-flow beam forming, whether the spectrum efficiency of described terminal is higher than the spectrum efficiency of described terminal when using list/dual-stream beamforming.
During concrete enforcement, the embodiment of the present invention provide multiple antennas channel adaptive device can also comprise: data transmission unit, for selecting the N number of antenna channels meeting preset pitch condition to be after described terminal carries out multi-flow beam forming from multiple antennas passage at described processing unit, when not being assigned with the Physical Resource Block PRB of use if exist, utilize the PRB not being assigned with use to be described terminal transmission data simultaneously.
For convenience of description, above each several part is divided into each module (or unit) according to function and describes respectively.Certainly, the function of each module (or unit) can be realized in same or multiple software or hardware when implementing of the present invention.
It should be noted that, when specifically implementing, above-mentioned antenna for base station choice device and/or multiple antennas channel adaptive device can be arranged in a base station, realize multiple antennas channel adaptive by base station.Be to be understood that, above-mentioned antenna for base station choice device and/or multiple antennas channel adaptive device are arranged in a base station just embodiment of the present invention one preferably execution mode, during concrete enforcement, above-mentioned antenna for base station choice device and/or multiple antennas channel adaptive device also can be arranged in other network equipment.
According to the embodiment of the present invention, antenna channels number, with transmitting data stream number self adaptation, had both maintained losing of original multiaerial system work, provided the multi-stream data of better performance to transmit simultaneously.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (15)
1. an antenna for base station system of selection, is characterized in that, comprising:
When needs carry out multi-stream data transmission for terminal, from antenna for base station, the N number of antenna channels meeting preset pitch condition is selected to be that described terminal carries out multi-flow beam forming; Wherein, N be greater than 2 integer.
2. the method for claim 1, is characterized in that, described antenna for base station comprises 8 antenna channels; And
If when described multi-stream data is transmitted as 3 Stream Data Transmissions or 4 Stream Data Transmission, from antenna for base station, selects the N number of antenna channels meeting preset pitch condition to be that described terminal carries out multi-flow beam forming, comprising:
From antenna for base station, select 4 antenna channels meeting preset pitch condition to be that described terminal carries out multi-flow beam forming.
3. a multiple antennas channel adaptive method, is characterized in that, comprising:
Measure indication information to terminal transmitting channel state information reference signals CSI-RS, described CSI-RS measurement indication information is used to indicate described terminal and measures according to 4 port CSI-RS of configuration and/or 8 port CSI-RS;
Determine that described terminal supports multi-stream data transmission according to the first channel information of described terminal feedback, if and described terminal is measured according to 4 port CSI-RS, then utilize the method described in claim 1 from multiple antennas passage, select N number of antenna channels to be that described terminal carries out multi-flow beam forming according to the first channel information of described terminal feedback; If described terminal is measured according to 8 port CSI-RS, then reconfigure described terminal to measure according to 4 port CSI-RS, and from multiple antennas passage, select N number of antenna channels to be that described terminal carries out multi-flow beam forming according to the second channel Information Pull method according to claim 1 of described terminal feedback; Wherein, N be greater than 2 integer.
4. method as claimed in claim 3, is characterized in that, configure described terminal in accordance with the following methods and measure according to 4 port CSI-RS and 8 port CSI-RS:
According to predetermined period configure described terminal hocket 4 port CSI-RS measure and 8 port CSI-RS measure.
5. method as claimed in claim 3, is characterized in that, described channel information comprises order instruction RI and channel quality indicator CQI; And
Determine that described terminal supports multi-stream data transmission according to the first channel information of described terminal feedback, comprising:
Check whether described RI is greater than preset value; And
Determine whether described CQI is greater than predetermined threshold value;
If described RI is greater than preset value and described CQI is greater than predetermined threshold value, then determine that terminal supports multi-stream data transmission.
6. method as claimed in claim 3, is characterized in that, while send CSI-RS measurement indication information to terminal, also comprises:
List/dual-stream beamforming is carried out for described terminal; And
From multiple antennas passage, selecting the N number of antenna channels meeting preset pitch condition to be, after described terminal carries out multi-flow beam forming, also comprise:
Determine to use the spectrum efficiency of described terminal after multi-flow beam forming whether higher than the spectrum efficiency of described terminal when using list/dual-stream beamforming;
If not, then stop using multi-flow beam forming and use list/dual-stream beamforming.
7. method as claimed in claim 3, is characterized in that, is selecting the N number of antenna channels meeting preset pitch condition to be, after described terminal carries out multi-flow beam forming, also comprise from multiple antennas passage:
When not being assigned with the Physical Resource Block PRB of use if exist, utilize the PRB not being assigned with use to be described terminal transmission data simultaneously.
8. an antenna for base station choice device, is characterized in that, comprising:
Selected cell, for when needs carry out multi-stream data transmission for terminal, selects the N number of antenna channels meeting preset pitch condition to be that described terminal carries out multi-flow beam forming from antenna for base station; Wherein, N be greater than 2 integer.
9. device as claimed in claim 8, it is characterized in that, described antenna for base station comprises 8 antenna channels; And
Described selected cell, if when being transmitted as 3 Stream Data Transmissions or 4 Stream Data Transmission for described multi-stream data, selects 4 antenna channels meeting preset pitch condition to be that described terminal carries out multi-flow beam forming from described antenna for base station.
10. a multiple antennas channel adaptive device, is characterized in that, comprising:
Transmitting element, for measuring indication information to terminal transmitting channel state information reference signals CSI-RS, described CSI-RS measurement indication information is used to indicate described terminal and measures according to 4 port CSI-RS of configuration and/or 8 port CSI-RS;
Processing unit, for determining that according to the first channel information of described terminal feedback described terminal supports multi-stream data transmission, if and described terminal is measured according to 4 port CSI-RS, then utilize the method described in claim 1 from multiple antennas passage, select N number of antenna channels to be that described terminal carries out multi-flow beam forming according to the first channel information of described terminal feedback; If described terminal is measured according to 8 port CSI-RS, then reconfigure described terminal to measure according to 4 port CSI-RS, and from multiple antennas passage, select N number of antenna channels to be that described terminal carries out multi-flow beam forming according to the second channel Information Pull method according to claim 1 of described terminal feedback; Wherein, N be greater than 2 integer.
11. devices as claimed in claim 10, is characterized in that, also comprise:
Dispensing unit, measure according to 4 port CSI-RS and 8 port CSI-RS for configuring described terminal in accordance with the following methods: according to predetermined period configure described terminal hocket 4 port CSI-RS measure and 8 port CSI-RS measure.
12. devices as claimed in claim 10, is characterized in that, described channel information comprises order instruction RI and channel quality indicator CQI;
Described processing unit, for checking whether described RI is greater than preset value; And determine whether described CQI is greater than predetermined threshold value; If described RI is greater than preset value and described CQI is greater than predetermined threshold value, then determine that terminal supports multi-stream data transmission.
13. devices as claimed in claim 10, is characterized in that, also comprise:
Wave beam forming unit, for while send CSI-RS measurement indication information to terminal, carries out list/dual-stream beamforming for described terminal; And when determining unit determines the spectrum efficiency using the spectrum efficiency of described terminal after multi-flow beam forming not higher than described terminal in time using list/dual-stream beamforming, stop using multi-flow beam forming and use list/dual-stream beamforming;
Determining unit, for being after described terminal carries out multi-flow beam forming in the N number of antenna channels selecting to meet preset pitch condition from multiple antennas passage, after determining to use multi-flow beam forming, whether the spectrum efficiency of described terminal is higher than the spectrum efficiency of described terminal when using list/dual-stream beamforming.
14. devices as claimed in claim 10, is characterized in that, also comprise:
Data transmission unit, for selecting the N number of antenna channels meeting preset pitch condition to be after described terminal carries out multi-flow beam forming from multiple antennas passage at described processing unit, when not being assigned with the Physical Resource Block PRB of use if exist, utilize the PRB not being assigned with use to be described terminal transmission data simultaneously.
15. 1 kinds of base stations, is characterized in that, comprise claim 8 ~ 9 and/or the device described in the arbitrary claim of claim 10 ~ 14.
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