CN102448105B - The transmission method of downlink data and equipment - Google Patents
The transmission method of downlink data and equipment Download PDFInfo
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- CN102448105B CN102448105B CN201010506150.1A CN201010506150A CN102448105B CN 102448105 B CN102448105 B CN 102448105B CN 201010506150 A CN201010506150 A CN 201010506150A CN 102448105 B CN102448105 B CN 102448105B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
Abstract
The embodiment of the invention discloses a kind of transmission method and equipment of downlink data, by applying the technical scheme of the embodiment of the present invention, terminal equipment is enable to utilize single port CSI-RS to measure, and on this basis, single layer data transmission can be carried out, in the technical scheme that the embodiment of the present invention proposes, single codeword transmission is only supported between terminal equipment and network equipment, the DCI format that expense is lower can be adopted, be conducive to supporting the transfer of data of edge termination equipment and increasing the terminal equipment quantity that can support.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of transmission method of downlink data and equipment.
Background technology
LTE-A (LongTermEvolutionAdvanced, senior Long Term Evolution) in introduce based on CSI-RS (ChannelStateInformationReferenceSignal, channel state information reference signals) measurement mechanism, work in TM (TransferMode, transmission mode) 9 UE (UserEquipment, subscriber equipment) need according to generating CQI (ChannelQualityIndication to the measurement of CSI-RS, channel quality indicates)/PMI (PrecodingMatrixIndicator, pre-coding matrix indicates)/RI (RankIndication, grade indicate) etc. reporting information.
At 3GPP (ThirdGenerationPartnershipProject, 3G (Third Generation) Moblie Partnership Program) determine at normalCP (normalCyclicPrefix in RAN1#61bis meeting, conventional cyclic prefix) and extendedCP (extendedCyclicPrefix, add long loop prefix) time adopt the CSI-RS pattern shown in Fig. 1 and Fig. 2 respectively, as depicted in figs. 1 and 2, the CSI-RS schematic diagram under being respectively normalCP condition and under extendedCP condition.
Match to make the transmission means of data and application scenarios and business demand, LTE (LongTermEvolution, Long Term Evolution) in be that PDSCH (PhysicalDownlinkSharedChannel, Physical Downlink Shared Channel) defines multiple transmission mode.
Such as, in LTERel-8, PDSCH can use 7 kinds of transmission modes:
TM1: single antenna port (port0)
TM2: transmit diversity
TM3: Open-Loop Spatial Multiplexing
TM4: Closed-Loop Spatial Multiplexing
TM5：MU-MIMO
The Open-Loop Spatial Multiplexing of TM6:rank1
TM7: single antenna port (port5)
Further, introduce the dual-stream beamforming transmission mode based on dual-port DMRS (DemodulationReferenceSignal, demodulated reference signal) in LTERel-9, be defined as follows in specification:
TM8: dual-port (port7 & 8) or single port (port7or8)
Wherein, in above-mentioned TM1 ~ 6, all need to utilize CRS (CommonReferenceSignal, public reference signal) to carry out measuring and demodulation, and TM7-8 is only suitable for DRS (DedicatedReferenceSignal, DRS (Dedicated Reference Signal)) when data demodulates.
TM7 uses port 5, and TM8 uses port 7/8.
As shown in Figure 3 and Figure 4, the schematic diagram of UE dedicated reference symbol port 5 (normalCP) and UE dedicated reference symbol port 7/8 (normalCP) is respectively.
Have employed in LTERel-8/9 and measure channel based on CRS and report the mechanism of CQI/PMI/RI, and by transmission mode new for definition at least one in LTERel-10, its CSI (ChannelStateInformation, channel condition information) measures and reports based on CSI-RS.
In the process realizing the embodiment of the present invention, applicant finds that prior art at least exists following problem:
According to current Standardization, based on 2,4,8CSI-RS carries out the transmission of measuring and feedback scheme is determined substantially, but still not based on transmission and the feedback scheme of 1 port CSI-RS.
Summary of the invention
The embodiment of the present invention provides a kind of transmission method and equipment of downlink data, as transmission mode new in lte-a system and corresponding data transmission scheme, enables to utilize 1 port CSI-RS.
For achieving the above object, the embodiment of the present invention provides a kind of transmission method of downlink data on the one hand, comprising:
The content of the Downlink Control Information DCI that the terminal equipment being in single port transmission mode sends according to the network equipment received, determine the type of downlink data transmission scheme, and according to described downlink data transmission scheme type reception described in network equipment send downlink data;
Described terminal equipment carries out channel measurement based on channel state information reference signals CSI-RS port, generates the channel condition information CSI comprising Single Code Word Channel Quality information CQI;
Described terminal equipment is to the CSI comprising single codeword CQI described in described network equipment feedback.
On the other hand, the embodiment of the present invention additionally provides a kind of terminal equipment, comprising:
Receiver module, for receiving the DCI of network side transmission, high-rise instruction and downlink data;
Determination module, for the content of the DCI that the network equipment received according to described receiver module sends, determine the type of downlink data transmission scheme, and make described receiver module according to described downlink data transmission scheme type reception described in network equipment send downlink data;
Measurement module, for the information received by described receiver module, carries out channel measurement based on CSI-RS port, generates the CSI comprising single codeword CQI;
Reporting module, for feeding back the CSI comprising single codeword CQI that described measurement module generates to described network equipment.
On the other hand, the embodiment of the present invention additionally provides a kind of transmission method of downlink data, comprising:
Terminal equipment configuration, by high-level signaling, is single port transmission mode by network equipment;
Described network equipment sends DCI to described terminal equipment, indicates the type of described terminal equipment downlink data transmission scheme, and sends downlink data according to the type of described downlink data transmission scheme to described terminal equipment;
Described network equipment receives the CSI comprising single codeword CQI that described terminal equipment reports.
On the other hand, the embodiment of the present invention additionally provides a kind of network equipment, comprising:
Sending module, for sending high-level signaling to terminal equipment, be single port transmission mode by terminal equipment configuration, and send DCI to described terminal equipment, indicate the type of described terminal equipment downlink data transmission scheme, and send downlink data according to the type of described downlink data transmission scheme to described terminal equipment;
Receiver module, for receiving the CSI comprising single codeword CQI that described terminal equipment reports.
Compared with prior art, the embodiment of the present invention has the following advantages:
By applying the technical scheme of the embodiment of the present invention, terminal equipment is enable to utilize single port CSI-RS to measure, and on this basis, single layer data transmission can be carried out, in the technical scheme that the embodiment of the present invention proposes, only support single codeword transmission between terminal equipment and network equipment, the DCI format that expense is lower can be adopted, be conducive to supporting the transfer of data of edge termination equipment and increasing the terminal equipment quantity that can support.
Accompanying drawing explanation
Fig. 1 is the CSI-RS schematic diagram in prior art under normalCP condition;
Fig. 2 is the CSI-RS schematic diagram in prior art under extendedCP condition;
Fig. 3 is the schematic diagram of UE dedicated reference symbol port 5 (normalCP) in prior art;
Fig. 4 is the schematic diagram of UE dedicated reference symbol port 7/8 (normalCP) in prior art;
Fig. 5 is the schematic flow sheet of transmission method in terminal equipment side of a kind of downlink data that the embodiment of the present invention proposes;
Fig. 6 is the schematic flow sheet of transmission method on network equipment of a kind of downlink data that the embodiment of the present invention proposes;
Fig. 7 is the structural representation of a kind of terminal equipment that the embodiment of the present invention proposes;
Fig. 8 is the structural representation of a kind of network equipment that the embodiment of the present invention proposes.
Embodiment
In order to realize higher transmission rate, in LTE-A, introduce the MIMO scheme of support 8 flow transmission.Meanwhile, consider from the angle reducing expense, LTE-A peels off the measurement of reference signal and demodulation function.
Have employed in LTE-A and carry out measuring and feed back and carry out the mechanism of demodulation based on DMRS based on CSI-RS.Wherein, the time-frequency density of CSI-RS is lower, and its port number is determined by the antenna of eNB and transmitter configuration substantially; The port number of DMRS depends on the number of plies of transfer of data, and its time-frequency location and density can ensure the needs of data demodulates.
According to current Standardization, determine to define the CSI-RS that port number is respectively 2,4,8 in LTERel-10, and definition is carried out measuring and the new transmission mode (TM9) fed back based on 2,4,8 port CSI-RS.
But, CSI-RS port number be 1 configuration mode not yet determine, but this 1 port CSI-RS still may be introduced at the future version of LTE.And still there is not a kind of transmission mode of carrying out measuring Yu feed back based on 1 port CSI-RS at present.
For this problem, the embodiment of the present invention proposes a kind of new transmission mode and corresponding data transmission scheme, enables to utilize 1 port CSI-RS.
As shown in Figure 5, be the schematic flow sheet of the transmission method of a kind of downlink data of embodiment of the present invention proposition, the method specifically comprises the following steps:
The content of the DCI that step S501, the terminal equipment being in single port transmission mode send according to the network equipment received, determine the type of downlink data transmission scheme, and according to the downlink data that the type reception network equipment of downlink data transmission scheme sends.
It is further noted that, before this step, also comprise the processing procedure that terminal equipment receives the high-level signaling of the configures single-ended port transmission pattern that network equipment sends, by such process, network equipment can be realized by high-level signaling, for the semi-static configuration of transmission mode in terminal equipment.
In actual applications, according to the setting of corresponding transmission mode, the processing procedure of this step is specifically divided into following two kinds of situations:
Situation one, when the content of DCI is the first mark, the type of terminal equipment determination downlink data transmission scheme is fall-back transmission scheme.
Wherein, fall-back transmission scheme, the Physical Downlink Shared Channel PDSCH be specially corresponding to terminal equipment uses transmit diversity mode or single antenna port mode to carry out downlink data transmission.
Situation two, when the content of DCI is the second mark, the type of terminal equipment determination downlink data transmission scheme is main transmission plan.
Wherein, main transmission plan, be specially the data-mapping that transmits in the PDSCH corresponding to a terminal equipment demodulated reference signal DMRS port to terminal equipment, corresponding data stream is to each physical antenna of network equipment.
And in concrete application scenarios, corresponding data stream depends on the implementation algorithm of network equipment to the mode of each physical antenna of network equipment, and the content change of specific implementation algorithm can't affect protection scope of the present invention.
It is further noted that when the content of DCI is the second mark, in the second mark, also comprise the information of the DMRS port of terminal equipment and SCID (ScramblingID, the scrambling code identification) information of DMRS port.
Step S502, terminal equipment carry out channel measurement based on channel state information reference signals CSI-RS port, generate the channel condition information CSI comprising Single Code Word Channel Quality information CQI.
In the implementation procedure of this step, corresponding with the situation two of abovementioned steps, when the content of DCI is the second mark, and terminal equipment is when being scheduled, terminal equipment is also by according to the included information of DMRS port and the SCID information of DMRS port in the second mark, use DMRS port to carry out channel measurement, and demodulation is carried out to the downlink data received.
For this step, when terminal equipment receives the high-level signaling comprising CSI type information, corresponding process is specifically divided into following two kinds of situations:
Situation one, do not carry out PMI gives the correct time when high-level signaling indicating terminal equipment, in the CSI that terminal equipment generates, only comprise single codeword CQI.
Situation two, when there are at least two CSI-RS ports in network equipment, and high-level signaling indicating terminal equipment carries out PMI gives the correct time, and the CSI that terminal equipment generates comprises PMI and single codeword CQI.
Step S503, terminal equipment contain the CSI of single codeword CQI to network equipment feedback packet.
In actual applications, the process of this step specifically comprises:
The configuration that terminal equipment reception network equipment sends reports the high-level signaling of pattern;
Terminal equipment contains the CSI of single codeword CQI according to reporting pattern to network equipment feedback packet.
The above embodiments describe the realization flow of transmission method in terminal equipment side of the downlink data that the embodiment of the present invention proposes, corresponding, the embodiment of the present invention furthermore present the realization flow of transmission method on network equipment of downlink data, its schematic flow sheet as shown in Figure 6, comprises the following steps:
Terminal equipment configuration, by high-level signaling, is single port transmission mode by step S601, network equipment.
Step S602, network equipment send DCI to terminal equipment, the type of indicating terminal equipment downlink data transmission scheme, and send downlink data according to the type of downlink data transmission scheme to terminal equipment.
Corresponding with the situation in aforesaid step S501, this step is also divided into following two kinds of situations:
Situation one, when the content of DCI is the first mark, the type of the downlink data transmission scheme of network equipment indicating terminal equipment is fall-back transmission scheme.
Wherein, fall-back transmission scheme, the PDSCH be specially corresponding to terminal equipment uses transmit diversity mode or single antenna port mode to carry out downlink data transmission.
Situation two, when the content of DCI is the second mark, the type of the downlink data transmission scheme of network equipment indicating terminal equipment is main transmission plan.
Wherein, main transmission plan, be specially the data-mapping that transmits in the PDSCH corresponding to a terminal equipment DMRS port to terminal equipment, corresponding data stream is to each physical antenna of network equipment.
And in concrete application scenarios, corresponding data stream depends on the implementation algorithm of network equipment to the mode of each physical antenna of network equipment, and the content change of specific implementation algorithm can't affect protection scope of the present invention.
It is further noted that when the content of DCI is the second mark, in the second mark, also comprise the information of the DMRS port of terminal equipment and the SCID information of DMRS port.
The CSI comprising single codeword CQI that step S603, network equipment receiving terminal apparatus report.
In the application scenarios of reality, the processing procedure of this step is specially:
Network equipment sends to terminal equipment the high-level signaling that configuration reports pattern;
Network equipment receiving terminal apparatus is according to the CSI comprising single codeword CQI reporting Mode Feedback.
It is further noted that except the CSI that receiving terminal apparatus directly feeds back, network equipment can also obtain the CSI of some by SRS.
Compared with prior art, the embodiment of the present invention has the following advantages:
By applying the technical scheme of the embodiment of the present invention, terminal equipment is enable to utilize single port CSI-RS to measure, and on this basis, single layer data transmission can be carried out, in the technical scheme that the embodiment of the present invention proposes, only support single codeword transmission between terminal equipment and network equipment, the DCI format that expense is lower can be adopted, be conducive to supporting the transfer of data of edge termination equipment and increasing the terminal equipment quantity that can support.
Below, in conjunction with concrete application scenarios, the technical scheme that the embodiment of the present invention proposes is described.
The technical scheme that the embodiment of the present invention proposes defines a kind of new transmission mode, and in subsequent embodiment, suspense is TM10.
Similar with other transmission modes (TM1 ~ TM9), this transmission mode comprises two kinds of transmission plans equally.Wherein, the first transmission plan is called fall-back transmission scheme, is mainly used in the transition stage of transmission mode switching and the situation of transmission conditions deterioration; The second transmission plan is called main transmission plan, the prevailing transmission scheme used when being transfer of data in this transmission mode.
Two kinds of transmission meanss adopt different DCIformat to control respectively, and terminal equipment can determine current transmission plan according to the detection of PDCCH.
If the DCIformat that the fall-back transmission scheme in TM10 uses is 1A; the DCIformat that main transmission plan uses is 1E; in concrete application scenarios, above-mentioned DCIformat content can be changed to other marks, and such change does not affect protection scope of the present invention.
Network equipment carries out semi-static configuration by high-level signaling to the transmission mode of terminal equipment.
When terminal equipment works in TM10, its transfer of data, channel measurement and feedback procedure can be described below respectively:
1, transfer of data
(1) when PDCCH uses DCIformat1A, downlink data transmission adopts fall-back transmission scheme.
Specifically, PDSCH uses the transmit diversity mode or single port port0 that specify in Rel-8/9
(2) when PDCCH uses DCIformat1E, downlink data transmission adopts main transmission plan.
Specifically, the data of PDSCH are hinted obliquely to a terminal equipment dedicated reference symbol port, and according to certain mode by this data stream on each physical antenna of network equipment.
2, channel measurement
(1) terminal equipment side is when data demodulates, uses terminal equipment dedicated reference symbol to carry out channel estimating, and carries out data demodulates.
It is pointed out that demodulation flow process is herein triggered when terminal equipment is scheduled, also there is identical setting in follow-up embodiment, no longer repeat specification.
(2) terminal equipment is measured based on CSI-RS port, generates CQI etc. and reports parameter.
3, feed back
What terminal equipment configured according to high level reports pattern, carries out feedback it should be noted that by PUCCH and PUSCH, if network equipment is configured with more than 1 CSI-RS port, in fact also can adopt the technical scheme that the embodiment of the present invention proposes.
Further, in conjunction with concrete application scenarios, technical scheme of the present invention is described as follows:
Application scenarios one, terminal equipment transmit based on port 7 or 8, only report the CQI of single codeword, are described as follows accordingly:
1, transfer of data
(1) when PDCCH uses DCIformat1A, downlink data transmission adopts fall-back transmission scheme, and specifically PDSCH uses the transmit diversity mode or single port port0 that specify in Rel-8/9.
(2) when PDCCH uses DCIformat1E, downlink data transmission adopts main transmission plan, specifically the data of PDSCH are hinted obliquely to terminal equipment dedicated reference symbol port 7 or 8, and according to certain mode by this data stream such as, to (this mapping mode depends on the implementation algorithm of network equipment, and network equipment can be measured up channel based on SRS and select suitable mapping mode) on each physical antenna of network equipment.
Wherein, the dedicated reference symbol port of terminal equipment use and the SCID of this DMRS port are indicated by the corresponding control information in DCIformat1E.
2, channel measurement
(1) terminal equipment side is when data demodulates, according to port and the SCID of DCIformat1E instruction, uses terminal equipment dedicated reference symbol port 7 or 8 to carry out channel estimating, and carries out data demodulates.
(2) terminal equipment is when calculating the CSI for reporting, and measures based on CSI-RS port.The CSI wherein reported only comprises the CQI reflecting single code word.
3, feed back
(1) what terminal equipment configured according to high level reports pattern (can only be configured to do not comprise PMI/RI report pattern), is fed back CSI by PUCCH and PUSCH.
(2) network equipment can also obtain certain CSI according to SRS.
Application scenarios two, to transmit based on port 7 or 8, report single codeword CQI or report CQI/PMI simultaneously, being described as follows accordingly:
1, transfer of data
(1) when PDCCH uses DCIformat1A, downlink data transmission adopts fall-back transmission scheme, and specifically PDSCH uses the transmit diversity mode or single port port0 that specify in Rel-8/9.
(2) when PDCCH uses DCIformat1E, downlink data transmission adopts main transmission plan, specifically the data of PDSCH are hinted obliquely to terminal equipment dedicated reference symbol port 7 or 8, and according to certain mode by this data stream such as, to (this mapping mode depends on the implementation algorithm of network equipment, and network equipment can be measured up channel based on SRS and select suitable mapping mode) on each physical antenna of network equipment.Wherein the dedicated reference symbol port of terminal equipment use and the SCID of this DMRS port are indicated by the corresponding control information in DCIformat1E.
2, channel measurement
(1) terminal equipment side is when data demodulates, according to port and the SCID of DCIformat1E instruction, uses terminal equipment dedicated reference symbol port 7 or 8 to carry out channel estimating, and carries out data demodulates.
(2) terminal equipment is when calculating the CSI for reporting, and measures based on CSI-RS port, and calculates CSI according to the CSI type of high level configuration, is specifically divided into following two kinds of situations:
Report if the high-rise indicating terminal equipment of A does not carry out PMI, then no matter network equipment has several CSI-RS port, and CSI only comprises the label (CQI) reflecting single code word channel quality information.
If B network equipment has the CSI-RS port more than 1, and high-rise indicating terminal equipment carries out PMI and reports, then CSI comprises pre-coding matrix label (PMI) and reflects the label (CQI) of single code word channel quality information.
Wherein, the PMI that network equipment employs terminal equipment and reports in PDSCH transmission is supposed in CQI computational process.
3, feed back
(1) what terminal equipment configured according to high level reports pattern, is fed back by PUCCH and PUSCH.
(2) network equipment can also obtain certain CSI according to SRS.
Application scenarios three, to transmit based on port 5, report single codeword CQI or report CQI/PMI simultaneously, being described as follows accordingly:
1, transfer of data
(1) when PDCCH uses DCIformat1A, downlink data transmission adopts fall-back transmission scheme, and specifically PDSCH uses the transmit diversity mode or single port port0 that specify in Rel-8/9.
(2) when PDCCH uses DCIformat1E, downlink data transmission adopts main transmission plan, specifically the data of PDSCH are hinted obliquely to terminal equipment dedicated reference symbol port 5, and according to certain mode by this data stream such as, to (this mapping mode depends on the implementation algorithm of network equipment, and network equipment can be measured up channel based on SRS and select suitable mapping mode) on each physical antenna of network equipment.
2, channel measurement
(1) terminal equipment side is when data demodulates, uses terminal equipment dedicated reference symbol port 5 to carry out channel estimating, and carries out data demodulates.
(2) terminal equipment is when calculating the CSI for reporting, and measures based on CSI-RS port.The CSI wherein reported only comprises the label (CQI) reflecting single code word channel quality information.
3, feed back
(1) what terminal equipment configured according to high level reports pattern (can only be configured to do not comprise PMI/RI report pattern), is fed back CSI by PUCCH and PUSCH.
(2) network equipment can also obtain certain CSI according to SRS.
Application scenarios four, to transmit based on port 5, report single codeword CQI or report CQI/PMI simultaneously, being described as follows accordingly:
1, transfer of data
(1) when PDCCH uses DCIformat1A, downlink data transmission adopts fall-back transmission scheme, and specifically PDSCH uses the transmit diversity mode or single port port0 that specify in Rel-8/9.
(2) when PDCCH uses DCIformat1E, downlink data transmission adopts main transmission plan, specifically the data of PDSCH are hinted obliquely to terminal equipment dedicated reference symbol port 5, and according to certain mode by this data stream such as, to (this mapping mode depends on the implementation algorithm of network equipment, and network equipment can be measured up channel based on SRS and select suitable mapping mode) on each physical antenna of network equipment.
2, channel measurement
(1) terminal equipment side is when data demodulates, uses terminal equipment dedicated reference symbol port 5 to carry out channel estimating, and carries out data demodulates.
(2) terminal equipment is when calculating the CSI for reporting, and measures based on CSI-RS port, and calculates CSI according to the CSI type of high level configuration, is specifically divided into following two kinds of situations:
Report if the high-rise indicating terminal equipment of A does not carry out PMI, then no matter network equipment has several CSI-RS port, and CSI only comprises the label (CQI) reflecting single code word channel quality information.
If B network equipment has the CSI-RS port more than 1, and high-rise indicating terminal equipment carries out PMI and reports, then CSI comprises pre-coding matrix label (PMI) and reflects the label (CQI) of single code word channel quality information.Wherein suppose the PMI that network equipment employs terminal equipment and reports in PDSCH transmission in CQI computational process.
3, feed back
(1) what terminal equipment configured according to high level reports pattern, is fed back by PUCCH and PUSCH.
(2) network equipment can also obtain certain CSI according to SRS.
Compared with prior art, the embodiment of the present invention has the following advantages:
By applying the technical scheme of the embodiment of the present invention, terminal equipment is enable to utilize single port CSI-RS to measure, and on this basis, single layer data transmission can be carried out, in the technical scheme that the embodiment of the present invention proposes, only support single codeword transmission between terminal equipment and network equipment, the DCI format that expense is lower can be adopted, be conducive to supporting the transfer of data of edge termination equipment and increasing the terminal equipment quantity that can support.
In order to realize the technical scheme of the embodiment of the present invention, the embodiment of the present invention additionally provides a kind of terminal equipment, and its structural representation as shown in Figure 7, specifically comprises:
Receiver module 71, for receiving the DCI of network side transmission, high-rise instruction and downlink data.
In concrete application scenarios, receiver module 71, also for:
Receive the high-level signaling of the configures single-ended port transmission pattern that network equipment sends, and/or comprise the high-level signaling of CSI type information, and/or configuration reports the high-level signaling of pattern.
Determination module 72, for the content of the DCI that the network equipment received according to receiver module 71 sends, determine the type of downlink data transmission scheme, and make the downlink data that receiver module 71 sends according to the type reception network equipment of downlink data transmission scheme.
In actual applications, determination module 72, specifically for:
When the content of the DCI received by receiver module 71 is the first mark, determine that the type of downlink data transmission scheme is fall-back transmission scheme, fall-back transmission scheme, the PDSCH be specially corresponding to terminal equipment uses transmit diversity mode or single antenna port mode to carry out downlink data transmission;
When the content of the DCI received by receiver module 71 is the second mark, determine that the type of downlink data transmission scheme is main transmission plan, main transmission plan, be specially the data-mapping that transmits in the PDSCH corresponding to a terminal equipment DMRS port to terminal equipment, corresponding data stream is to each physical antenna of network equipment;
Wherein, when the content of the DCI received by receiver module 71 is the second mark, in the second mark, also comprise the information of the DMRS port of terminal equipment and the SCID information of DMRS port.
Measurement module 73, for the information received by receiver module 71, carries out channel measurement based on CSI-RS port, generates the CSI comprising single codeword CQI.
It should be noted that, when the content of the DCI received by receiver module 71 is the second mark, and received by receiver module 71 scheduling instruction time, measurement module 73, also for:
According to the included information of DMRS port and the SCID information of DMRS port in the second mark, use DMRS port to carry out channel measurement, and demodulation is carried out to the downlink data received by receiver module 71.
It is pointed out that when receiver module 71 receives the high-level signaling comprising CSI type information, measurement module 73, specifically for:
When high-level signaling indicating terminal equipment does not carry out pre-coding matrix instruction PMI gives the correct time, generate the CSI only comprising single codeword CQI;
When there are at least two CSI-RS ports in network equipment, and high-level signaling indicating terminal equipment carries out pre-coding matrix instruction PMI gives the correct time, and generates the CSI comprising PMI and single codeword CQI.
Reporting module 74, for the CSI comprising single codeword CQI generated to network equipment feedback measurement module 73.
In concrete application scenarios, reporting module 74, specifically for the CSI comprising single codeword CQI reporting pattern to generate to network equipment feedback measurement module 73 that the high-level signaling received by receiver module 71 configures.
On the other hand, the embodiment of the present invention additionally provides a kind of network equipment, and its structural representation as shown in Figure 8, specifically comprises:
Sending module 81, for sending high-level signaling to terminal equipment, be single port transmission mode by terminal equipment configuration, and send DCI to terminal equipment, the type of indicating terminal equipment downlink data transmission scheme, and send downlink data according to the type of downlink data transmission scheme to terminal equipment.
In practical application scene, sending module 81, specifically for:
When the content of the DCI that sending module 81 sends is the first mark, the type of the downlink data transmission scheme of indicating terminal equipment is fall-back transmission scheme, fall-back transmission scheme, the PDSCH be specially corresponding to terminal equipment uses transmit diversity mode or single antenna port mode to carry out downlink data transmission;
When the content of the DCI that sending module 81 sends is the second mark, the type of the downlink data transmission scheme of indicating terminal equipment is main transmission plan, main transmission plan, be specially the data-mapping that transmits in the PDSCH corresponding to a terminal equipment DMRS port to terminal equipment, corresponding data stream is to each physical antenna of network equipment;
Wherein, when the content of the DCI that sending module 81 sends is the second mark, in the second mark, also comprise the information of the DMRS port of terminal equipment and the SCID information of DMRS port.
Further, sending module 81, also for:
To the high-level signaling of the configures single-ended port transmission pattern that terminal equipment sends, and/or comprise the high-level signaling of CSI type information, and/or configuration reports the high-level signaling of pattern.
Receiver module 82, for the CSI comprising single codeword CQI that receiving terminal apparatus reports.
In actual applications, receiver module 82, specifically for:
The CSI comprising single codeword CQI reporting Mode Feedback that receiving terminal apparatus configures according to sending module 81.
Further, receiver module 82, also for receiving certain CSI by SRS.
Compared with prior art, the embodiment of the present invention has the following advantages:
By applying the technical scheme of the embodiment of the present invention, terminal equipment is enable to utilize single port CSI-RS to measure, and on this basis, single layer data transmission can be carried out, in the technical scheme that the embodiment of the present invention proposes, only support single codeword transmission between terminal equipment and network equipment, the DCI format that expense is lower can be adopted, be conducive to supporting the transfer of data of edge termination equipment and increasing the terminal equipment quantity that can support.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform each method implementing described in scene of the embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram preferably implementing scene, the module in accompanying drawing or flow process might not be that the enforcement embodiment of the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device implemented in scene can carry out being distributed in the device of enforcement scene according to implementing scene description, also can carry out respective change and being arranged in the one or more devices being different from this enforcement scene.The module of above-mentioned enforcement scene can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality implementing scene.
Be only the several concrete enforcement scene of the embodiment of the present invention above, but the embodiment of the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into the business limited field of the embodiment of the present invention.
Claims (21)
1. a transmission method for downlink data, is characterized in that, comprising:
The content of the Downlink Control Information DCI that the terminal equipment being in single port transmission mode sends according to the network equipment received, determine the type of downlink data transmission scheme, and according to described downlink data transmission scheme type reception described in network equipment send downlink data;
Described terminal equipment carries out channel measurement based on channel state information reference signals CSI-RS port, generates the channel condition information CSI comprising Single Code Word Channel Quality information CQI;
Described terminal equipment is to the CSI comprising single codeword CQI described in described network equipment feedback;
Wherein, described in be in single port transmission mode the content of Downlink Control Information DCI that sends according to the network equipment received of terminal equipment, before determining the type of downlink data transmission scheme, also comprise:
Described terminal equipment receives the high-level signaling of the configures single-ended port transmission pattern that described network equipment sends;
Wherein, when described terminal equipment receives the high-level signaling comprising CSI type information, described terminal equipment carries out channel measurement based on CSI-RS port, generates the CSI comprising single codeword CQI, is specially:
When described high-level signaling indicates described terminal equipment not carry out pre-coding matrix instruction PMI gives the correct time, in the described CSI that described terminal equipment generates, only comprise single codeword CQI;
When there are at least two CSI-RS ports in described network equipment, and described high-level signaling indicates described terminal equipment to carry out PMI gives the correct time, and the described CSI that described terminal equipment generates comprises PMI and single codeword CQI.
2. the method for claim 1, is characterized in that, described in be in single port transmission mode the content of Downlink Control Information DCI that sends according to the network equipment received of terminal equipment, determine the type of downlink data transmission scheme, comprising:
When the content of described DCI is the first mark, the type of described terminal equipment determination downlink data transmission scheme is fall-back transmission scheme;
When the content of described DCI is the second mark, the type of described terminal equipment determination downlink data transmission scheme is main transmission plan.
3. method as claimed in claim 2, is characterized in that,
Described fall-back transmission scheme, the Physical Downlink Shared Channel PDSCH be specially corresponding to described terminal equipment uses transmit diversity mode or single antenna port mode to carry out downlink data transmission;
Described main transmission plan, be specially the data-mapping that transmits in the PDSCH corresponding to a described terminal equipment demodulated reference signal DMRS port to described terminal equipment, corresponding data stream is to each physical antenna of described network equipment.
4. method as claimed in claim 3, is characterized in that, when the content of described DCI is the second mark, also comprises the information of the DMRS port of described terminal equipment and the scrambling code identification SCID information of described DMRS port in described second mark.
5. method as claimed in claim 4, it is characterized in that, when the content of described DCI is the second mark, and when described terminal equipment is scheduled, described method also comprises:
Described terminal equipment, according to the included information of DMRS port and the SCID information of described DMRS port in described second mark, uses described DMRS port to carry out channel measurement, and carries out demodulation to the downlink data received.
6. the method for claim 1, is characterized in that, described terminal equipment, to the CSI comprising single codeword CQI described in described network equipment feedback, specifically comprises:
Described terminal equipment receives the configuration that described network equipment sends and reports the high-level signaling of pattern;
Described terminal equipment according to described in report pattern to the CSI comprising single codeword CQI described in described network equipment feedback.
7. a terminal equipment, is characterized in that, comprising:
Receiver module, for receiving the DCI of network side transmission, high-rise instruction and downlink data;
Determination module, for the content of the DCI that the network equipment received according to described receiver module sends, determine the type of downlink data transmission scheme, and make described receiver module according to described downlink data transmission scheme type reception described in network equipment send downlink data;
Measurement module, for the information received by described receiver module, carries out channel measurement based on CSI-RS port, generates the CSI comprising single codeword CQI;
Reporting module, for feeding back the CSI comprising single codeword CQI that described measurement module generates to described network equipment;
Wherein, described receiver module, also for:
Receive the high-level signaling of the configures single-ended port transmission pattern that described network equipment sends, and/or comprise the high-level signaling of CSI type information, and/or configuration reports the high-level signaling of pattern;
Wherein, when described receiver module receives the high-level signaling comprising CSI type information, described measurement module, specifically for:
When described high-level signaling indicates described terminal equipment not carry out pre-coding matrix instruction PMI gives the correct time, generate the CSI only comprising single codeword CQI;
When there are at least two CSI-RS ports in described network equipment, and described high-level signaling indicates described terminal equipment to carry out pre-coding matrix instruction PMI gives the correct time, and generates the CSI comprising PMI and single codeword CQI.
8. terminal equipment as claimed in claim 7, is characterized in that, described determination module, specifically for:
When the content of the DCI received by described receiver module is the first mark, determine that the type of downlink data transmission scheme is fall-back transmission scheme, described fall-back transmission scheme, the PDSCH be specially corresponding to described terminal equipment uses transmit diversity mode or single antenna port mode to carry out downlink data transmission;
When the content of the DCI received by described receiver module is the second mark, determine that the type of downlink data transmission scheme is main transmission plan, described main transmission plan, be specially the data-mapping that transmits in the PDSCH corresponding to a described terminal equipment DMRS port to described terminal equipment, corresponding data stream is to each physical antenna of described network equipment;
Wherein, when the content of the DCI received by described receiver module is the second mark, in described second mark, also comprise the information of the DMRS port of described terminal equipment and the SCID information of described DMRS port.
9. terminal equipment as claimed in claim 8, is characterized in that, when the content of the DCI received by described receiver module is the second mark, and during scheduling instruction received by described receiver module, described measurement module, also for:
According to the included information of DMRS port and the SCID information of described DMRS port in described second mark, use described DMRS port to carry out channel measurement, and demodulation is carried out to the downlink data received by described receiver module.
10. terminal equipment as claimed in claim 7, it is characterized in that, described reporting module, the pattern that reports configured specifically for the high-level signaling received by described receiver module feeds back to described network equipment the CSI comprising single codeword CQI that described measurement module generates.
The transmission method of 11. 1 kinds of downlink datas, is characterized in that, comprising:
Terminal equipment configuration, by high-level signaling, is single port transmission mode by network equipment;
Described network equipment sends DCI to described terminal equipment, indicates the type of described terminal equipment downlink data transmission scheme, and sends downlink data according to the type of described downlink data transmission scheme to described terminal equipment;
Described network equipment receives the CSI comprising single codeword CQI that described terminal equipment reports;
Wherein, before what described network equipment received that described terminal equipment reports comprise the CSI of single codeword CQI, also comprise:
Described network equipment sends the high-level signaling comprising CSI type information to described terminal equipment, to make described terminal equipment carry out channel measurement based on CSI-RS port, generate the CSI comprising single codeword CQI;
Wherein, when described high-level signaling indicates described terminal equipment not carry out pre-coding matrix instruction PMI gives the correct time, in the described CSI that described terminal equipment generates, only single codeword CQI is comprised;
When there are at least two CSI-RS ports in described network equipment, and described high-level signaling indicates described terminal equipment to carry out PMI gives the correct time, and the described CSI that described terminal equipment generates comprises PMI and single codeword CQI.
12. methods as claimed in claim 11, is characterized in that, described network equipment sends DCI to described terminal equipment, indicates the type of described terminal equipment downlink data transmission scheme, is specially:
When the content of described DCI is the first mark, described network equipment indicates the type of the downlink data transmission scheme of described terminal equipment to be fall-back transmission scheme;
When the content of described DCI is the second mark, described network equipment indicates the type of the downlink data transmission scheme of described terminal equipment to be main transmission plan.
13. methods as claimed in claim 12, is characterized in that,
Described fall-back transmission scheme, the PDSCH be specially corresponding to described terminal equipment uses transmit diversity mode or single antenna port mode to carry out downlink data transmission;
Described main transmission plan, be specially the data-mapping that transmits in the PDSCH corresponding to a described terminal equipment DMRS port to described terminal equipment, corresponding data stream is to each physical antenna of described network equipment.
14. methods as claimed in claim 13, is characterized in that, when the content of described DCI is the second mark, also comprise the information of the DMRS port of described terminal equipment and the SCID information of described DMRS port in described second mark.
15. methods as claimed in claim 11, it is characterized in that, described network equipment receives the CSI comprising single codeword CQI that described terminal equipment reports, and is specially:
Described network equipment sends to described terminal equipment the high-level signaling that configuration reports pattern;
Described network equipment receive described terminal equipment according to described in report the CSI comprising single codeword CQI described in Mode Feedback.
16. methods as claimed in claim 11, it is characterized in that, described network equipment receives the CSI comprising single codeword CQI that described terminal equipment reports, and also comprises:
Described network equipment obtains CSI by SRS.
17. 1 kinds of network equipments, is characterized in that, comprising:
Sending module, for sending high-level signaling to terminal equipment, be single port transmission mode by terminal equipment configuration, and send DCI to described terminal equipment, indicate the type of described terminal equipment downlink data transmission scheme, and send downlink data according to the type of described downlink data transmission scheme to described terminal equipment;
Receiver module, for receiving the CSI comprising single codeword CQI that described terminal equipment reports;
Wherein, before what described network equipment received that described terminal equipment reports comprise the CSI of single codeword CQI, also comprise:
Described network equipment sends the high-level signaling comprising CSI type information to described terminal equipment, to make described terminal equipment carry out channel measurement based on CSI-RS port, generate the CSI comprising single codeword CQI;
Wherein, when described high-level signaling indicates described terminal equipment not carry out pre-coding matrix instruction PMI gives the correct time, in the described CSI that described terminal equipment generates, only single codeword CQI is comprised;
When there are at least two CSI-RS ports in described network equipment, and described high-level signaling indicates described terminal equipment to carry out PMI gives the correct time, and the described CSI that described terminal equipment generates comprises PMI and single codeword CQI.
18. network equipments as claimed in claim 17, is characterized in that, described sending module, specifically for:
When the content of the DCI that described sending module sends is the first mark, the type of the downlink data transmission scheme of described terminal equipment is indicated to be fall-back transmission scheme, described fall-back transmission scheme, the PDSCH be specially corresponding to described terminal equipment uses transmit diversity mode or single antenna port mode to carry out downlink data transmission;
When the content of the DCI that described sending module sends is the second mark, the type of the downlink data transmission scheme of described terminal equipment is indicated to be main transmission plan, described main transmission plan, be specially the data-mapping that transmits in the PDSCH corresponding to a described terminal equipment DMRS port to described terminal equipment, corresponding data stream is to each physical antenna of described network equipment;
Wherein, when the content of the DCI that described sending module sends is the second mark, in described second mark, also comprise the information of the DMRS port of described terminal equipment and the SCID information of described DMRS port.
19. network equipments as claimed in claim 17, is characterized in that, described sending module, also for:
To the high-level signaling of the configures single-ended port transmission pattern that terminal equipment sends, and/or comprise the high-level signaling of CSI type information, and/or configuration reports the high-level signaling of pattern.
20. network equipments as claimed in claim 19, is characterized in that, described receiver module, specifically for:
What receive that described terminal equipment configures according to described sending module reports the CSI comprising single codeword CQI described in Mode Feedback.
21. network equipments as claimed in claim 17, is characterized in that, described receiver module, also for:
CSI is received by SRS.
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| CN201010506150.1A CN102448105B (en) | 2010-10-09 | 2010-10-09 | The transmission method of downlink data and equipment |
| PCT/CN2011/080551 WO2012045284A1 (en) | 2010-10-09 | 2011-10-08 | Downlink data transmission method and device therefor |
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| CN103391155B (en) * | 2012-05-11 | 2016-12-14 | 华为技术有限公司 | The collocation method of reference signal, base station and subscriber equipment |
| EP3343997B1 (en) * | 2015-09-29 | 2019-08-21 | Huawei Technologies Co., Ltd. | Method and device for determining data transmission scheme |
| CN107370591B (en) * | 2016-05-13 | 2022-03-01 | 中兴通讯股份有限公司 | Signaling transmission method, device and system |
| CN110311764B (en) * | 2018-03-27 | 2023-04-07 | 维沃移动通信有限公司 | Method for transmitting demodulation reference signal, terminal equipment and network side equipment |
| CN110504999B (en) * | 2018-05-17 | 2021-11-30 | 华为技术有限公司 | Communication method, terminal equipment and network equipment |
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| WO2008081857A1 (en) * | 2006-12-28 | 2008-07-10 | Panasonic Corporation | Base station device, terminal device, and closed loop control method |
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