CN105391479A - Method, base station and system for feeding back codebook in LTE network through terminal - Google Patents
Method, base station and system for feeding back codebook in LTE network through terminal Download PDFInfo
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- CN105391479A CN105391479A CN201410427544.6A CN201410427544A CN105391479A CN 105391479 A CN105391479 A CN 105391479A CN 201410427544 A CN201410427544 A CN 201410427544A CN 105391479 A CN105391479 A CN 105391479A
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Abstract
The invention discloses a method, base station and system for feeding back a codebook in an LTE network through a terminal. The base station sends an RRC signal to inform the terminal that a downlink PDSCH employs a Massive MIMO transmission mode and to inform the terminal of the number of SCI-RS antenna ports. The base station sends the RRC signal to configure the codebook feedback mode of the terminal. The base station generates a forming matrix according to a PMI, and carries out the forming transmission of the data of the downlink PDSCH. The PMI comprises a polarization coupling codebook index, a horizontal codebook index, and a vertical codebook index. The method, base station and system enable a base station and a terminal of a conventional LTE system to support the configuration and feedback for the Massive MIMO technology through the extension of a conventional RRC signal and a conventional uplink feedback signal of LTE, enable the Massive MIMO technology to be used in the LTE system better, and enable the capacity, compared with the capacity of a conventional system, of the LTE system to be greatly improved.
Description
Technical field
The present invention relates to mobile network's technical field, particularly relate to the method for terminal feedback code book in a kind of LTE network, base station and system.
Background technology
Long Term Evolution LTE wireless communication system has become the mobile communication system of following main flow, it is compared with the cdma wireless communication system of 3G, improve system spectral efficiency further, improve user data-throughput, but the development of the demand data improved constantly along with user and wireless technology, rear LTE system research (i.e. 5G system) also starts.MassiveMIMO (extensive MIMO) is as a kind of new antenna technology, by increasing bay quantity, and to each array element separate configurations radio frequency unit, make MassiveMIMO system can support 3D wave beam forming, simultaneously because base station end number of antennas is far away more than terminal number, make base station end can support a large number of users multiplexed information thus significantly promote cell throughout.But current LTE system does not define the relevant RRC signal deployment of MassiveMIMO and feedback system, therefore also do not support the code book feedback being greater than 8 antenna ports, do not support that vertical code book feeds back yet.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide the method for terminal feedback code book in a kind of LTE network, supports the configuration to MassiveMIMO transmission mode and feedback.
A method for terminal feedback code book in LTE network, comprising: base station sends RRC signaling user equipment downlink PDSCH and adopts MassiveMIMO transmission mode and CSI-RS antenna port number; Described base station sends the code book feedback system of RRC signal deployment terminal; Described base station receives the code book index PMI of terminal feedback on PUSCH, generates figuration matrix, carry out figuration transmission to descending PDSCH data according to described PMI; Wherein, described PMI comprises: Polarization Coupling code book index, horizontal code book index, vertical code book index.
According to one embodiment of present invention, further, described base station adopts MassiveMIMO transmission mode by user equipment downlink PDSCH channel described in AntennaInfoinformationelements signaling; Wherein, the MassiveMIMO transmission mode information of carrying in described AntennaInfoinformationelements signaling comprises: TM11.
According to one embodiment of present invention, further, the field of the described MassiveMIMO transmission mode of expansion mark in the AntennaInfoDedicated-r10 data item in described AntennaInfoinformationelements signaling.
According to one embodiment of present invention, further, CSI-RS antenna port number is carried by CSI-RS-Config signaling in described base station, and CSI-RS antenna port number comprises: 1,2,4,8,16,32,64,128,256; Described CSI-RS antenna port digital section is expanded in the antennaPortsCount data item of described CSI-RS-Config signaling.
According to one embodiment of present invention, further, described terminal knows that current PDSCH is MassiveMIMO transmission means, CSI-RS antenna port number and code book feedback system; Described terminal obtains CSI-RS pilot frequency locations according to described CSI-RS antenna port number, and carries out channel estimation calculation to pilot tone CSI-RS channel; Described terminal obtains all antenna port informations according to channel estimating, generates the channel matrix of all antenna ports; Described terminal generates MassiveMIMO multiple antennas code book according to polarization code book index, horizontal code book index, vertical code book index; Described terminal determines code book collection according to the number r of described channel matrix rank RI, described MassiveMIMO multiple antennas code book and described channel matrix are carried out related operation, select the code book the highest with channel relevancy, and obtain Polarization Coupling code book index corresponding to this code book, horizontal code book index, vertical code book index; Described terminal feeds back PMI according to code book feedback system on PUSCH, and described PMI comprises: Polarization Coupling code book index, horizontal code book index, vertical code book index.
According to one embodiment of present invention, further, described base station sends the code book feedback system of CQI-ReportConfig signal deployment terminal; Described code book feedback system comprises: Mode1-3, Mode1-2, Mode2-2.
The technical problem that the present invention will solve is to provide a kind of base station, supports the configuration to MassiveMIMO transmission mode and feedback.
A kind of base station, comprising: information issues unit, adopting extensive MassiveMIMO transmission mode and CSI-RS antenna port number for sending RRC signaling user equipment downlink PDSCH; Codebooks modes issues unit, for sending the code book feedback system of RRC signal deployment terminal; Downlink data transmission unit, for receiving the code book index PMI of terminal feedback on PUSCH, generating figuration matrix according to described PMI, carrying out figuration transmission to descending PDSCH data; Wherein, described PMI comprises: Polarization Coupling code book index, horizontal code book index, vertical code book index.
According to one embodiment of present invention, further, described information issues unit and adopts MassiveMIMO transmission mode by user equipment downlink PDSCH channel described in AntennaInfoinformationelements signaling; Wherein, the field of the described MassiveMIMO transmission mode of expansion mark in the AntennaInfoDedicated-r10 data item in described AntennaInfoinformationelements signaling; The MassiveMIMO transmission mode information of carrying in described AntennaInfoinformationelements signaling comprises: TM11.
According to one embodiment of present invention, further, described information issues unit and carries CSI-RS antenna port number by CSI-RS-Config signaling, and CSI-RS antenna port number comprises: 1,2,4,8,16,32,64,128,256; Described CSI-RS antenna port digital section is expanded in the antennaPortsCount data item of described CSI-RS-Config signaling.
According to one embodiment of present invention, further, described codebooks modes issues the code book feedback system that unit sends CQI-ReportConfig signal deployment terminal; Described code book feedback system comprises: Mode1-3, Mode1-2, Mode2-2.
The technical problem that the present invention will solve is to provide a kind of LTE network system, supports the configuration to MassiveMIMO transmission mode and feedback.
A kind of LTE network system, comprising: base station as above; Terminal, for obtaining CSI-RS pilot frequency locations according to CSI-RS antenna port number, and carries out channel estimation calculation to pilot tone CSI-RS channel; Obtain all antenna port informations according to channel estimating, generate the channel matrix of all antenna ports; MassiveMIMO multiple antennas code book is generated according to polarization code book index, horizontal code book index, vertical code book index; Number r according to described channel matrix rank RI determines code book collection, described MassiveMIMO multiple antennas code book and described channel matrix are carried out related operation, select the code book the highest with channel relevancy, and obtain Polarization Coupling code book index corresponding to this code book, horizontal code book index, vertical code book index; On PUSCH, PMI is fed back according to code book feedback system.
According to one embodiment of present invention, further, described base station sends the code book feedback system of CQI-ReportConfig signal deployment terminal; Described code book feedback system comprises: Mode1-3, Mode1-2, Mode2-2.
The method of terminal feedback code book, base station and system in LTE network of the present invention, when adopting MassiveMIMO technology in LTE, by the expansion existing RRC signaling of LTE and uplink feedback signalling, make the base station of existing LTE system and terminal support to the configuration of MassiveMIMO technology and feedback, make MassiveMIMO technology in LTE system, obtain better application, thus make the relative existing system of LTE system obtain significantly capacity boost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of an embodiment of method according to terminal feedback code book in LTE network of the present invention;
Fig. 2 is the flow chart according to another embodiment of the method for terminal feedback code book in LTE network of the present invention;
Fig. 3 is the schematic diagram of an embodiment according to base station of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.Below in conjunction with each figure and embodiment, many-sided description is carried out to technical scheme of the present invention.
Fig. 1 is the flow chart of an embodiment of method according to terminal feedback code book in LTE network of the present invention, as shown in Figure 1:
Step 101, base station sends RRC signaling user equipment downlink PDSCH and adopts MassiveMIMO transmission mode and CSI-RS antenna port number.
Step 102, base station sends the code book feedback system of RRC signal deployment terminal.
Step 103, base station receives the code book index pre-coding matrix instruction PMI of terminal feedback on PUSCH, generates figuration matrix, carry out figuration transmission to descending PDSCH data according to PMI; Wherein, PMI comprises: Polarization Coupling code book index, horizontal code book index, vertical code book index.
In one embodiment, transmit for MassiveMIMO, a kind of new transmission mode is defined in LTE-A, such as TM11, this transmission mode supports maximum 256 antenna ports, and base station can be terminal configuration, and different antenna port numbers sends data, comprises antenna port 1,2,4,8,16,32,64,128,256 etc.Expand existing RRC signaling, in RRC signaling, increase the configuration of this transmission mode and the configuration of respective antenna port number.Base station can adopt multiple RRC signaling to expand, the descending PDSCH of notification terminal adopts MassiveMIMO transmission mode and CSI-RS antenna port number, base station also can adopt the code book feedback system of multiple RRC signal deployment terminal, and the RRC signaling of employing can set according to specific circumstances.
In one embodiment, base station adopts MassiveMIMO transmission mode by AntennaInfoinformationelements signaling user equipment downlink PDSCH channel; Wherein, the MassiveMIMO transmission mode information of carrying in AntennaInfoinformationelements signaling comprises: TM11.The field of expansion mark MassiveMIMO transmission mode in AntennaInfoDedicated-r10 data item in AntennaInfoinformationelements signaling.
In one embodiment, CSI-RS antenna port number is carried by CSI-RS-Config signaling in base station, and CSI-RS antenna port number comprises: 1,2,4,8,16,32,64,128,256; CSI-RS antenna port digital section is expanded in the antennaPortsCount data item of CSI-RS-Config signaling.Base station sends the code book feedback system of CQI-ReportConfig signal deployment terminal; Code book feedback system comprises: Mode1-3, Mode1-2, Mode2-2.
The method of terminal feedback code book in LTE network of the present invention, transmit for MassiveMIMO, a kind of new transmission mode TM11 is defined in LTE-A, this transmission mode supports maximum 256 antenna ports, and base station can be terminal configuration, and different antenna port numbers sends data, comprises antenna port 1,2,4,8,16,32,64,128,256 etc.Expand existing RRC signaling, in RRC signaling, increase the configuration of this transmission mode and the configuration of respective antenna port number.
Such as: expand in AntennaInfoDedicated-r10 data item:
transmissionMode-r10ENUMERATED
{tm1,tm2,tm3,tm4,tm5,tm6,tm7,tm8-v920,tm9-v1020,tm10-v1130,spare6,spare5,spare4,spare3,spare2,spare1}。
Spare6 is changed to tm11, increases transmission mode TM11, instruction MassiveMIMO transmission.
CSI-RS-Config data item is expanded, increases:
antennaPortsCount-r14ENUMERATED
{ an1, an2, an4, an8, an16, an32, an64, an128, an256} item supports 256 antenna ports.
In one embodiment, for MassiveMIMO definition transmission mode, such as TM11, and aperiodic code book feedback model Reportingmode, such as: Mode1-3, Modes1-2, Mode2-2.PMI indication information in the PUSCH feedback signaling that expansion is corresponding, such as: PMI indicates and is made up of the instruction of polarization code book feedback, the instruction of vertical code book feedback and the instruction of horizontal code book feedback, makes feedback signaling support 3D multi-antenna port code book feedback.
The method of terminal feedback code book in LTE network of the present invention, propose a kind of when adopting extensive antenna (MassiveMIMO) technology in LTE, terminal code book feedback method under the precoding processing of base station, by expanding the configuration of existing transmission mode and terminal uplink feedback signaling, following LTE terminal can be supported, and up vertical direction code book feeds back, and then realizes cell capacity lifting by the 3D beamforming technique of MassiveMIMO.
In one embodiment, terminal knows that current PDSCH is MassiveMIMO transmission means, CSI-RS antenna port number and code book feedback system, obtain CSI-RS pilot frequency locations according to CSI-RS antenna port number, and channel estimation calculation is carried out to pilot tone CSI-RS channel.
Terminal obtains all antenna port informations according to channel estimating, generate the channel matrix of all antenna ports, MassiveMIMO multiple antennas code book is generated according to polarization code book index, horizontal code book index, vertical code book index, and determine code book collection according to the number r of channel matrix rank RI, MassiveMIMO multiple antennas code book and channel matrix are carried out related operation, select the code book the highest with channel relevancy, obtain Polarization Coupling code book index corresponding to this code book, horizontal code book index, vertical code book index, on PUSCH, feed back PMI according to code book feedback system.
Fig. 2 is the flow chart according to another embodiment of the method for terminal feedback code book in LTE network of the present invention, as shown in Figure 2:
Step 201: base station is by expansion RRC signaling, such as: AntennaInfoinformationelements and CSI-RS-Config, the descending PDSCH of notification terminal adopts MassiveMIMO transmission mode, be such as TM11, and CSI-RS antenna port number, such as 1,2,4,8,16,32,64,128,256 etc.
Step 202: base station, by RRC signaling CQI-ReportConfig configurating terminal code book feedback system, comprising: feedback Mode1-2; Mode2-2; Mode3-1.
Step 203: by RRC signaling, terminal knows that the transmission means of current PDSCH is MassiveMIMO transmission, such as TM11, CSI-RS antenna port number, such as 256 ports, and code book feedback system.
Step 204: terminal obtains CSI-RS pilot frequency locations according to antenna port number, and obtain pilot tone CSI-RS channel conditions by channel estimation method (such as MMSE algorithm etc.).
Step 205: after terminal utilizes channel estimating to obtain all antenna port informations, such as 256 antenna ports, can generate the channel matrix of all antenna ports, such as: 256 antenna ports.
Step 206: terminal generates MassiveMIMO multiple antennas code book according to polarization code book index, horizontal code book index, vertical code book index.
Step 207: terminal determines code book collection according to the number r of channel sequence RI, then code book and channel matrix are carried out related operation, select the code book the highest with channel relevancy, and obtain Polarization Coupling code book index corresponding to this code book, horizontal code book index, vertical code book index.
Step 208: terminal is according to the requirement of feedback Mode1-2, Mode2-2 and Mode3-1 pattern configurations, and the code book index PMI that PUSCH feeds back, comprises Polarization Coupling code book index, horizontal code book index, vertical code book index.
Step 209: base station, according to the code book index PMI of terminal feedback, comprises Polarization Coupling code book index, horizontal code book index generates figuration matrix with vertical code book index, carry out figuration transmission to descending PDSCH data.
In one embodiment, PMI instruction is expanded for non-periodic feedback Mode1-3, Mode1-2, Mode2-2, increase VerticalPMIi3 bit to indicate as vertical code book, following table 1 provides the extended method of Mode1-3, and all the other pattern Mode1-2, Mode2-2 adopt similar fashion expansion.
The PMI indication bit expansion of table 1-Mode1-3
As shown in Figure 3, the invention provides a kind of base station 3, comprising: information issues unit 31, codebooks modes issues unit 32 and downlink data transmission unit 33.Information issues unit 31 and sends RRC signaling user equipment downlink PDSCH and adopt extensive MassiveMIMO transmission mode and CSI-RS antenna port number.Codebooks modes issues the code book feedback system that unit 32 sends RRC signal deployment terminal.Downlink data transmission unit 33 receives the code book index PMI of terminal feedback on PUSCH, generates figuration matrix, carry out figuration transmission to descending PDSCH data according to PMI.
In one embodiment, information issues unit 31 and adopts MassiveMIMO transmission mode by AntennaInfoinformationelements signaling user equipment downlink PDSCH channel.The field of expansion mark MassiveMIMO transmission mode in AntennaInfoDedicated-r10 data item in AntennaInfoinformationelements signaling; The MassiveMIMO transmission mode information of carrying in AntennaInfoinformationelements signaling comprises: TM11.
In one embodiment, information issues unit 31 and carries CSI-RS antenna port number by CSI-RS-Config signaling, and CSI-RS antenna port number comprises: 1,2,4,8,16,32,64,128,256; CSI-RS antenna port digital section is expanded in the antennaPortsCount data item of CSI-RS-Config signaling.
In one embodiment, codebooks modes issues the code book feedback system that unit 32 sends CQI-ReportConfig signal deployment terminal; Code book feedback system comprises: Mode1-3, Mode1-2, Mode2-2.
According to one embodiment of present invention, a kind of LTE network system, comprising: base station as above and terminal.
The method of terminal feedback code book, base station and system in LTE network of the present invention, when adopting MassiveMIMO technology in LTE, by the expansion existing RRC signaling of LTE and uplink feedback signalling, make the base station of existing LTE system and terminal support to the configuration of MassiveMIMO technology and feedback, make MassiveMIMO technology in LTE system, obtain better application, thus make the relative existing system of LTE system obtain significantly capacity boost.
Method and system of the present invention may be realized in many ways.Such as, any combination by software, hardware, firmware or software, hardware, firmware realizes method and system of the present invention.Said sequence for the step of method is only to be described, and the step of method of the present invention is not limited to above specifically described order, unless specifically stated otherwise.In addition, in certain embodiments, can be also record program in the recording medium by the invention process, these programs comprise the machine readable instructions for realizing according to method of the present invention.Thus, the present invention also covers the recording medium stored for performing the program according to method of the present invention.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (12)
1. the method for terminal feedback code book in LTE network, is characterized in that, comprising:
Base station sends RRC signaling user equipment downlink PDSCH and adopts MassiveMIMO transmission mode and CSI-RS antenna port number;
Described base station sends the code book feedback system of RRC signal deployment terminal;
Described base station receives the code book index PMI of terminal feedback on PUSCH, generates figuration matrix, carry out figuration transmission to descending PDSCH data according to described PMI; Wherein, described PMI comprises: Polarization Coupling code book index, horizontal code book index, vertical code book index.
2. the method for claim 1, is characterized in that:
Described base station adopts MassiveMIMO transmission mode by user equipment downlink PDSCH channel described in AntennaInfoinformationelements signaling;
Wherein, the MassiveMIMO transmission mode information of carrying in described AntennaInfoinformationelements signaling comprises: TM11.
3. method as claimed in claim 2, is characterized in that:
The field of the described MassiveMIMO transmission mode of expansion mark in AntennaInfoDedicated-r10 data item in described AntennaInfoinformationelements signaling.
4. method as claimed in claim 2 or claim 3, is characterized in that:
CSI-RS antenna port number is carried by CSI-RS-Config signaling in described base station, and CSI-RS antenna port number comprises: 1,2,4,8,16,32,64,128,256.
Described CSI-RS antenna port digital section is expanded in the antennaPortsCount data item of described CSI-RS-Config signaling.
5. method as claimed in claim 4, is characterized in that:
It is MassiveMIMO transmission means, CSI-RS antenna port number and code book feedback system that described terminal obtains current PDSCH;
Described terminal obtains CSI-RS pilot frequency locations according to described CSI-RS antenna port number, and carries out channel estimation calculation to pilot tone CSI-RS channel;
Described terminal obtains all antenna port informations according to channel estimating, generates the channel matrix of all antenna ports;
Described terminal generates MassiveMIMO multiple antennas code book according to polarization code book index, horizontal code book index, vertical code book index;
Described terminal determines code book collection according to the number r of described channel matrix rank RI, described MassiveMIMO multiple antennas code book and described channel matrix are carried out related operation, select the code book the highest with channel relevancy, and obtain Polarization Coupling code book index corresponding to this code book, horizontal code book index, vertical code book index;
Described terminal feeds back PMI according to code book feedback system on PUSCH, and described PMI comprises: Polarization Coupling code book index, horizontal code book index, vertical code book index.
6. the method for claim 1, is characterized in that:
Described base station sends the code book feedback system of CQI-ReportConfig signal deployment terminal;
Described code book feedback system comprises: Mode1-3, Mode1-2, Mode2-2.
7. a base station, is characterized in that, comprising:
Information issues unit, adopts extensive MassiveMIMO transmission mode and CSI-RS antenna port number for sending RRC signaling user equipment downlink PDSCH;
Codebooks modes issues unit, for sending the code book feedback system of RRC signal deployment terminal;
Downlink data transmission unit, for receiving the code book index PMI of terminal feedback on PUSCH, generating figuration matrix according to described PMI, carrying out figuration transmission to descending PDSCH data; Wherein, described PMI comprises: Polarization Coupling code book index, horizontal code book index, vertical code book index.
8. base station as claimed in claim 7, is characterized in that:
Described information issues unit and adopts MassiveMIMO transmission mode by user equipment downlink PDSCH channel described in AntennaInfoinformationelements signaling;
Wherein, the field of the described MassiveMIMO transmission mode of expansion mark in the AntennaInfoDedicated-r10 data item in described AntennaInfoinformationelements signaling; The MassiveMIMO transmission mode information of carrying in described AntennaInfoinformationelements signaling comprises: TM11.
9. base station as claimed in claim 8, is characterized in that:
Described information issues unit and carries CSI-RS antenna port number by CSI-RS-Config signaling, and CSI-RS antenna port number comprises: 1,2,4,8,16,32,64,128,256.
Described CSI-RS antenna port digital section is expanded in the antennaPortsCount data item of described CSI-RS-Config signaling.
10. base station as claimed in claim 7, is characterized in that:
Described codebooks modes issues the code book feedback system that unit sends CQI-ReportConfig signal deployment terminal;
Described code book feedback system comprises: Mode1-3, Mode1-2, Mode2-2.
11. 1 kinds of LTE network systems, is characterized in that, comprising:
Base station as described in claim 7 to 10 any one;
Terminal, for obtaining CSI-RS pilot frequency locations according to CSI-RS antenna port number, and carries out channel estimation calculation to pilot tone CSI-RS channel; Obtain all antenna port informations according to channel estimating, generate the channel matrix of all antenna ports; MassiveMIMO multiple antennas code book is generated according to polarization code book index, horizontal code book index, vertical code book index; Number r according to described channel matrix rank RI determines code book collection, described MassiveMIMO multiple antennas code book and described channel matrix are carried out related operation, select the code book the highest with channel relevancy, and obtain Polarization Coupling code book index corresponding to this code book, horizontal code book index, vertical code book index; On PUSCH, PMI is fed back according to code book feedback system.
12. systems as claimed in claim 11, is characterized in that:
Described base station sends the code book feedback system of CQI-ReportConfig signal deployment terminal;
Described code book feedback system comprises: Mode1-3, Mode1-2, Mode2-2.
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