WO2010121502A1 - 一种非周期信道质量信息发送方法 - Google Patents
一种非周期信道质量信息发送方法 Download PDFInfo
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- WO2010121502A1 WO2010121502A1 PCT/CN2010/070404 CN2010070404W WO2010121502A1 WO 2010121502 A1 WO2010121502 A1 WO 2010121502A1 CN 2010070404 W CN2010070404 W CN 2010070404W WO 2010121502 A1 WO2010121502 A1 WO 2010121502A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
Definitions
- the present invention relates to an LTE (Long Term Evolution) system and an LTE Advanced (Advanced Long Term Evolution) system, and in particular, to a method for transmitting aperiodic channel quality information.
- LTE Long Term Evolution
- LTE Advanced Advanced Long Term Evolution
- the seven transmission modes are defined, and each of the transmission modes uses different multi-antenna processing methods, so it is necessary to feed back different channel information.
- the seven transmission modes, and their corresponding aperiodic channel quality information (CQI) feedback modes are as follows:
- Transmission mode 1 single antenna transmission mode based on antenna port 0
- aperiodic CQI feedback mode 2-0 or 3-0 using aperiodic CQI feedback mode 2-0 or 3-0;
- Transmission mode 2 uses aperiodic CQI feedback mode 2-0 or 3-0;
- Transmission mode 3 (open loop multiplexing) using aperiodic CQI feedback mode 2-0 or 3-0;
- Transmission mode 4 (closed loop multiplexing) uses aperiodic CQI feedback mode 1-2, 2-2 or 3-1; transmission mode 5 (multiple input multiple output (MIMO)) uses aperiodic CQI feedback mode 3-1; Transmission mode 6 (closed-loop multiplexing with rank 1) using aperiodic CQI feedback modes 1-2, 2-2 or
- Transmission mode 7 (single antenna transmission mode based on antenna port 5) uses aperiodic CQI feedback mode 2-0 or 3-0.
- Different user equipments select subband feedback, the UE selects M subbands, reports the CQI of the first stream's M mode 2-0 subbands, reports the wideband CQI of the first stream, and for the transmission mode 3, according to the report
- the UE selects the subband feedback, and the UE 4 reports the CQI of the M subbands (using one PMI), M modes 2-2
- Subband PMI, wideband CQI and wideband PMI Transport Mode 4 only varies according to rank
- High-level configuration wideband CQI send only on subband set
- CQI for each subband (mode 3-0 only)
- the present invention provides a method for transmitting aperiodic channel quality information, thereby providing channel information required when using a dual stream beamforming multi-antenna technique.
- the present invention discloses a method for transmitting aperiodic channel quality information, including:
- the mobile terminal and the network side pre-approve one or several transmission modes supporting dual stream beamforming, and aperiodic channel quality information CQI feedback mode corresponding to the transmission mode;
- the network side indicates a pre-agreed transmission mode that the mobile terminal needs to use; when the mobile terminal receives the indication of using the transmission mode, the feedback is performed by using an aperiodic CQI feedback mode corresponding to the transmission mode. , feeding back CQI information to the network side.
- the mobile terminal further feeds back the precoding information PMI to the network side by using the aperiodic CQI feedback mode.
- the mobile terminal determines that the network side cannot acquire the multi-antenna weight information by using the uplink channel, the mobile terminal returns the PMI to the network side by using the aperiodic CQI feedback mode.
- the mobile terminal and the network side pre-agreed that the transmission mode 8 supports dual-stream beamforming without precoding information feedback, and the aperiodic CQI feedback mode of the transmission mode 8 is feedback mode 2-0 or feedback mode 3- 0;
- the mobile terminal uses the feedback mode 2-0 or the feedback mode 3-0 to feed back the CQI information of the first stream.
- the mobile terminal and the network side pre-agreed that the transmission mode 8 supports dual-stream beamforming that requires precoding information feedback or no precoding information feedback, and the aperiodic CQI feedback mode of the transmission mode 8 is a feedback mode 2 0, feedback mode 3-0, feedback mode 1-2, feedback mode 2-2 or feedback mode 3-1;
- the mobile terminal uses the feedback mode 2-0 or the feedback mode 3-0 to feed back CQI information of the first stream; or, the mobile terminal uses the feedback mode 1-2, feedback mode 2-2 or Feedback mode 3-1 feeds back CQI information, rank RI information, and PMI information for each stream.
- the mobile terminal and the network side pre-agreed the transmission mode 8 to support dual-stream beamforming without pre-coding information feedback, and the transmission mode 9 supports dual-stream beam formation requiring pre-coding information feedback;
- the aperiodic CQI feedback mode of the transmission mode 8 is a feedback mode 2-0 or a feedback mode 3-0
- the aperiodic CQI feedback mode of the transmission mode 9 is a feedback mode 1-2, a feedback mode 2-2 or a feedback Mode 3-1;
- the mobile terminal uses the feedback mode 2-0 or the feedback mode 3-0 to feed back the CQI information of the first stream; or
- the mobile terminal uses the feedback mode 1-2, the feedback mode 2-2 or the feedback mode 3-1 to feed back CQI information, rank RI information and PMI of each stream.
- the mobile terminal and the network side pre-agreed that the transmission mode 8 supports dual-stream beamforming that requires pre-coded information feedback, and the transmission mode 9 supports dual-stream beam formation without precoding information feedback;
- the aperiodic CQI feedback mode of the transmission mode 8 is a feedback mode 1-2, a feedback mode 2-2 or feedback mode 3-1, the aperiodic CQI feedback mode of the transmission mode 9 is feedback mode 2-0 or feedback mode 3-0;
- the mobile terminal uses the feedback mode 1-2, the feedback mode 2-2 or the feedback mode 3-1 to feed back CQI information, rank RI information, and PMI of each stream; or
- the mobile terminal uses the feedback mode 2-0 or the feedback mode 3-0 to feed back the CQI information of the first stream.
- the mobile terminal and the network side pre-agreed that the transmission mode 4 supports closed-loop multiplexing and dual-stream beamforming that requires pre-coding information feedback, and the transmission mode 8 supports dual-stream beamforming without precoding information feedback;
- the aperiodic CQI feedback mode of the transmission mode 4 is a feedback mode 1-2, a feedback mode
- the aperiodic CQI feedback mode of the transmission mode 8 is feedback mode 2-0 or feedback mode 3-0;
- the mobile terminal uses the feedback mode 1-2, the feedback mode 2-2 or the feedback mode 3-1 to feed back CQI information, rank RI information, and PMI of each stream; or
- the mobile terminal uses the feedback mode 2-0 or the feedback mode 3-0 to feed back the CQI message of the first stream.
- the mobile terminal and the network side pre-agreed that the transmission mode 3 supports open-loop multiplexing and dual-stream beamforming without PMI feedback, and the transmission mode 4 supports closed-loop multiplexing and dual-stream beamforming requiring PMI feedback;
- the aperiodic CQI feedback mode of the transmission mode 3 is a feedback mode 2-0 or a feedback mode
- the aperiodic CQI feedback mode of the transmission mode 4 is feedback mode 1-2, feedback mode 2-2 or feedback mode 3-1;
- the mobile terminal uses the feedback mode 2-0 or the feedback mode 3-0 to feed back the CQI information of the first stream; or
- the mobile terminal uses the feedback mode 1-2, the feedback mode 2-2 or the feedback mode 3-1 to feed back CQI information, rank RI information and PMI of each stream.
- the mobile terminal and the network side pre-agreed that the transmission mode 3 supports open-loop multiplexing and dual-stream beamforming without PMI feedback, and the transmission mode 8 supports the dual-flow beam that requires PMI feedback.
- the aperiodic CQI feedback mode of the transmission mode 3 is a feedback mode 2-0 or a feedback mode 3-0
- the aperiodic CQI feedback mode of the transmission mode 8 is a feedback mode 1-2, a feedback mode 2-2 or a feedback Mode 3-1;
- the mobile terminal uses the feedback mode 2-0 or the feedback mode 3-0 to feed back the CQI information of the first stream; or
- the mobile terminal uses the feedback mode 1-2, the feedback mode 2-2 or the feedback mode 3-1 to feed back CQI information, rank RI information and PMI of each stream.
- the present invention also provides a mobile terminal supporting aperiodic channel quality information transmission, the mobile terminal being configured to:
- the CQI information is fed back to the network side by using an aperiodic CQI feedback mode corresponding to the previously agreed one transmission mode.
- the mobile terminal of the present invention may be further configured to feed the precoding information PMI to the network side by using an aperiodic CQI feedback mode corresponding to the pre-agreed one of the transmission modes.
- the mobile terminal of the present invention is configured to: when determining that the network side cannot acquire the multi-antenna weight information by using the uplink channel, use the aperiodic CQI feedback mode corresponding to the pre-agreed one of the transmission modes to feed back the PMI to the network side. of.
- the present invention has the following advantages:
- the present invention proposes how to use the CQI feedback mode existing in LTE in dual-stream beamforming, so that it is not necessary to add a new feedback format, which is advantageous for reducing signaling overhead.
- the feedback content proposed by the present invention includes rank feedback.
- rank feedback When the rank is one, a single stream is used, and when the rank is two, a dual stream is used, so that single-flow beamforming to dual-stream beamforming and even multi-stream switching can be supported. .
- the present invention proposes a CQI feedback mode without PMI feedback information, and thus can support multi-stream beamforming without feedback PMI, which is advantageous for reducing feedback overhead.
- the invention also proposes a CQI feedback mode with PMI feedback information, so it can support multi-stream beamforming of feedback PMI, which is beneficial to improve the dimension of channel information feedback and improve system throughput.
- FIG. 1 is a flowchart of a method for transmitting aperiodic channel quality information according to the present invention.
- the main idea of the present invention is that the mobile terminal and the network side (the base station in the present invention) pre-agreed one or several dual-stream beamforming transmission modes, and configured the aperiodic for the pre-agreed transmission mode.
- the aperiodic CQI feedback mode uses the standard defined aperiodic mode, and the feedback content is the same as the standard specification, and should include at least CQI information.
- the terminal judges that the network side cannot use the channel reciprocity to obtain multi-antenna weighting information.
- the acyclic CQI feedback mode also needs to include PMI information, and the PMI information is selected according to different ranks. Precoding matrix.
- the CQI information of each stream fed back in the aperiodic CQI feedback mode further includes CQI information of wideband and subband.
- the RI information is the number of layers that the dual stream beamforming requires feedback to use.
- the transmission mode 8 is pre-agreed, and the transmission mode 8 is a transmission mode that supports dual-stream beamforming and does not require pre-coding information feedback, and the aperiodic CQI feedback modes 2-0 and 3-0 corresponding to the transmission mode 8 are agreed upon.
- the feedback mode includes the CQI information of the first stream. Since the existing CQI feedback mode 2-0, 3-0 does not support the multi-stream feedback of the transmission mode 8 in this embodiment, the present embodiment increases the transmission for the existing feedback mode 2-0, 3-0.
- the mode 8 feeds back the information of the CQI of the first stream. Specifically, the feedback content of the aperiodic CQI feedback mode 2-0, 3-0 in this embodiment is as shown in Table 2.
- the network side indicates, by the high layer signaling, the mobile terminal accessing the transmission mode that the user should use (in this embodiment, the transmission mode 8), and the mobile terminal uses the transmission mode according to the received indication.
- the corresponding aperiodic CQI feedback mode 2-0 or 3-0 feeds the CQI information back to the network side, and the network side configures the MCS (modulation coding scheme) or the multi-antenna weighted information transmission service data of the downlink transmission according to the information.
- the transmission mode 8 is pre-agreed, and the transmission mode 8 is a transmission mode supporting dual-stream beamforming that requires precoding information feedback and no precoding information feedback, and an aperiodic CQI feedback mode corresponding to the transmission mode 8 is agreed. -0, 1-2, 2-2, 3-1. At least the CQI information is included in the five feedback modes.
- the aperiodic CQI feedback mode 2-0, 3-0 in this embodiment is to add the transmission mode 8 in the existing aperiodic CQI feedback mode 2-0, 3-0 to feed back the CQI information of the first stream according to different RIs.
- the feedback content of the aperiodic CQI feedback mode 2-0, 3-0 in this embodiment is as shown in Table 3.
- the present embodiment is in the existing aperiodic CQI feedback mode 1 -2, 2-2 Based on 3-1, the CQI information of multiple streams is fed back according to different RI values.
- the feedback contents of the aperiodic CQI feedback modes 1-2, 2-2, and 3-1 in this embodiment are as shown in Table 3, and are the same as those in the standard 3GPP TS 36.213 7.2.1.
- the network side indicates, by the high-layer signaling, the mobile terminal accessing the transmission mode that the user should use (in this embodiment, the transmission mode 8), and after receiving the indication, the mobile terminal uses the current situation according to the actual situation.
- the aperiodic CQI feedback mode corresponding to the transmission mode 8 is 2-0, 3-0, 1-2, 2-2 or 3-1, and the RI information and the CQI information are sent to the network side, specifically, when the mobile terminal determines When the network side cannot rely on the reciprocity of the uplink channel to obtain multi-antenna weight information, the mobile terminal uses the aperiodic CQI feedback mode 1-2, 2-2 or 3-1 to feed back the RI information to the network side and two Based on the CQI information of the stream, the PMI information is also fed back to the network side; when the mobile terminal determines that the network side can rely on the reciprocity of the uplink channel to obtain the multi-antenna weighted value information, the aperiodic CQI feedback mode 2-0 or 3-0, thereby feeding back the CQI information of the first stream to the network side.
- network The network side configures MCS (Modulation and Coding Scheme) or multi-antenna weighted information transmission service data for down
- the transmission mode 8 and the transmission mode 9 are pre-agreed, wherein the transmission mode 8 is a transmission mode that supports dual-stream beamforming and does not require pre-coding information feedback, and the transmission mode 9 is a transmission mode that supports dual-stream beamforming and requires pre-coding information feedback.
- the transmission mode 8 and the transmission mode 9 are only the names defined in the present invention, and the corresponding contents and feedback modes are interchangeable.
- the aperiodic CQI feedback mode 2-0, 3-0 corresponding to the transmission mode 8 in the embodiment is agreed; the aperiodic CQI feedback mode 1-2, 2-2, 3 corresponding to the transmission mode 9 in the embodiment is agreed.
- the aperiodic CQI feedback mode 2-0, 3-0, 1-2, 2-2, 3-1 includes at least RI information and CQI information of two streams.
- the aperiodic CQI feedback modes 2-0, 3-0 described above are information for feeding back the CQI of the first stream based on the existing aperiodic CQI feedback modes 2-0, 3-0.
- the feedback contents of the aperiodic CQI feedback modes 2-0, 3-0 in this embodiment are as shown in Table 4.
- the aperiodic CQI feedback modes 1-2, 2-2, and 3-1 are fed back based on different RI values based on the existing aperiodic CQI feedback modes 1-2, 2-2, and 3-1.
- Streaming CQI information Specifically, the feedback contents of the aperiodic CQI feedback modes 1-2, 2-2, and 3-1 in this embodiment are as shown in Table 4.
- the UE selects subband feedback, the UE reports the CQI of the M subbands (using one PMI), the PMIs of the M subband modes 2-2, the wideband CQI and the wideband PMI (only the transmission mode 4 and the transmission mode 9 are different according to the rank)
- the network side indicates, by the high-layer signaling, that the mobile terminal accesses the transmission mode that the user should use (for example, the transmission mode 8).
- the mobile terminal uses the present embodiment according to the actual situation.
- the aperiodic CQI feedback mode 2-0 or 3-0 corresponding to the medium transmission mode 8 feeds the CQI information back to the network side, and the network side configures the MCS (modulation coding scheme) or the multi-antenna weighted information transmission service data of the downlink transmission according to the information. ;
- the network side indicates, by using the high layer signaling, that the mobile terminal accesses the transmission mode that the user should use (for example, the transmission mode 9). After receiving the indication, the mobile terminal responds to the transmission mode 9 in this embodiment according to the actual situation.
- the aperiodic CQI feedback mode 1-2, 2-2 or 3-1 feeds back the RI information, the CQI information of the two streams, and the PMI information to the network side, and the network side configures the downlink sent MCS according to the information (modulation coding scheme) Or multi-antenna weighted information to send business data.
- the dual-stream beamforming can simultaneously support the multi-antenna weighted weight information in the reciprocity dependent on the uplink channel according to the difference between the uplink and downlink channels, and feed back PMI (pre-coding information) according to the mobile terminal.
- the multi-stream beamforming of the mobile terminal feedback PMI is required to feed back the CQI and PMI on the multiple streams, and the feedback content and the feedback mode of the closed-loop multiplexing include the same content.
- the mobile terminal feedback is provided in this embodiment.
- Multi-stream beamforming of PMI is merged into transmission mode 4, That is, the content of the transmission mode 4 is modified in the LTE physical layer standard.
- the new transmission mode 4 is pre-agreed to support the transmission mode formed by the closed-loop multiplexing and the mobile terminal feedback PMI dual-stream beam.
- the transmission mode 8 is pre-agreed.
- the transmission mode 8 is a transmission mode that supports dual stream beamforming without precoding information feedback.
- the aperiodic CQI feedback mode 1-2, 2-2, 3-1 corresponding to the newly defined transmission mode 4 is agreed; the aperiodic CQI feedback mode corresponding to the transmission mode 8 in this embodiment is agreed 2-0, 3- 0.
- the aperiodic CQI feedback mode 2-0, 3-0, 1-2, 2-2, 3-1 includes at least RI information and CQI information of two streams.
- the aperiodic CQI feedback mode 2-0, 3-0 is present in this embodiment.
- the feedback content of the aperiodic CQI feedback mode 2-0, 3-0 in this embodiment is as shown in Table 5.
- the present embodiment is in the existing aperiodic CQI feedback.
- the CQI information of the plurality of streams is fed back according to different RI values.
- the feedback contents of the aperiodic CQI feedback modes 1-2, 2-2, and 3-1 in this embodiment are as shown in Table 5.
- the UE selects subband feedback, the UE reports the CQI of the M subbands (using one PMI), and the mode of the M subbands 2-2
- PMI, wideband CQI and wideband PMI (only transmission mode 4 is different according to rank) High-level configuration sub-band feedback, wideband PMI, subband CQI per stream (with wideband PMI), mode 3-1 wideband CQI for each stream (with wideband PMI).
- the network side instructs the mobile terminal to use the transmission mode in this embodiment.
- the mobile terminal feeds back the CQI of each stream to the network side by using the aperiodic CQI feedback mode 1-2, 2-2 or 3-1 corresponding to the transmission mode 4 in this embodiment.
- the mobile terminal uses the aperiodic CQI feedback mode corresponding to the transmission mode 8 in the embodiment 2-0 or 3-0. , feeding back the CQI information of the first stream to the network side.
- the present embodiment can combine the multi-stream beamforming without the mobile terminal feedback PMI into the transmission.
- Mode 3 that is, the content of the transmission mode 3 is modified in the LTE physical layer standard.
- the embodiment may combine the multi-stream beamforming of the mobile terminal feedback PMI into the transmission mode 4, that is, the transmission in the LTE physical layer standard.
- the content of mode 4 is modified.
- the new transmission mode 3 is pre-agreed to be a transmission mode formed by a dual stream beam that supports open loop multiplexing and without PMI feedback.
- a new transmission mode 4 is pre-agreed to support a closed-loop multiplexing and a dual-stream beam-forming transmission mode that requires PMI feedback.
- the aperiodic CQI feedback mode 2-0, 3-0, 1-2, 2-2, 3-1 includes at least CQI information.
- the existing CQI feedback mode 2-0, 3-0 does not support the multi-stream feedback of the transmission mode 3 in this embodiment, the aperiodic CQI feedback mode 2-0, 3-0 is present in this embodiment.
- the present embodiment is in the existing aperiodic CQI feedback. Based on the modes 1-2, 2-2, and 3-1, the CQI information of the plurality of streams is fed back according to different RI values.
- the switching of the single stream beamforming and the dual stream beamforming can also be supported.
- the mobile terminal uses the aperiodic CQI feedback mode corresponding to the transmission mode 3 in this embodiment. 2-0 or 3-0, feeding back the CQI information of each stream and the rank RI information to the network side;
- the mobile terminal uses the aperiodic CQI feedback mode corresponding to the transmission mode 4 in the embodiment 1 - 2 , 2- 2 or 3-1, feed back the CQI information, rank RI information, and PMI of each stream to the network side.
- the present embodiment can combine the multi-stream beamforming without the mobile terminal feedback PMI into the transmission.
- Mode 3 that is, the content of the transmission mode 3 is modified in the LTE physical layer standard.
- dual stream beamforming that does not feed back PMI is specifically defined as a new transmission mode 8.
- the new transmission mode 3 is pre-agreed to be a transmission mode that supports open-loop multiplexing and dual-stream beamforming without PMI feedback.
- the pre-agreed transmission mode 8 is a transmission mode of dual stream beamforming requiring PMI feedback.
- the aperiodic CQI feedback mode 2-0, 3-0, 1-2, 2-2, 3-1 includes at least RI information and CQI information of two streams.
- the aperiodic CQI feedback mode 2-0, 3-0 is present in this embodiment. Based on the aperiodic CQI feedback mode 2-0, 3-0, based on different RI values, the CQI information of multiple streams is fed back.
- the present embodiment is in the existing aperiodic CQI feedback. Based on the modes 1-2, 2-2, and 3-1, the CQI information of the plurality of streams is fed back according to different RI values.
- the mobile terminal uses the aperiodic CQI feedback mode corresponding to the transmission mode 3 in the embodiment 2 0 or 3-0, feeding back CQI information and rank RI information of each stream to the network side;
- the mobile terminal uses the aperiodic CQI feedback mode 1-2 corresponding to the transmission mode 8 in this embodiment, 2-2. Or 3-1, feeding back the CQI information, rank RI information, and PMI of each stream to the network side.
- a mobile terminal supporting aperiodic channel quality information transmission the mobile terminal and the network side pre-arranging one or several transmission modes supporting dual stream beamforming and an aperiodic channel quality information CQI feedback mode corresponding to the transmission mode; as well as
- the CQI information is fed back to the network side by using an aperiodic CQI feedback mode corresponding to the previously agreed one transmission mode.
- the mobile terminal of the present invention also feeds back the precoding information PMI to the network side by using an aperiodic CQI feedback mode corresponding to the pre-agreed one of the transmission modes.
- the mobile terminal of the present invention determines that the network side cannot obtain the multi-antenna weight value through the uplink channel.
- the PMI is fed back to the network side by using an aperiodic CQI feedback mode corresponding to the pre-agreed one of the transmission modes.
- the present invention since the present invention provides CQI information of two streams, the feedback requirement of dual stream beamforming can be supported.
- the present invention proposes that the feedback mode of dual stream beamforming can be used in existing LTE.
- the CQI feedback mode eliminates the need to add a new feedback format, which helps to reduce signaling overhead.
- the feedback content proposed by the present invention includes rank feedback. When the rank is one, the single stream is used, and when the rank is two, the dual stream is used, so that single-stream beamforming to dual-stream beamforming and even multi-stream switching can be supported.
- the present invention proposes a CQI feedback mode without PMI feedback information, so it can support multi-stream beamforming without feedback PMI, which is beneficial to reduce feedback overhead.
- the invention also proposes a CQI feedback mode with PMI feedback information, so it can support multi-stream beamforming of feedback PMI, which is beneficial to improve the channel information feedback dimension and improve system throughput.
- the present invention can support the feedback requirement of dual-stream beamforming, can eliminate the need for adding a new feedback format, and is beneficial for reducing signaling overhead, and can support single-stream beamforming to dual-stream beamforming, and even more.
- the switching of the flow can support multi-stream beamforming without feedback PMI, which is beneficial to reduce feedback overhead, and can also support multi-stream beamforming of feedback PMI, which is beneficial to improve the channel information feedback dimension and improve system throughput.
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012506314A JP2012525020A (ja) | 2009-04-22 | 2010-01-28 | 非周期チャネル品質情報送信方法 |
| US13/259,322 US8638865B2 (en) | 2009-04-22 | 2010-01-28 | Aperiodic channel quality information sending method |
| EP10766593.7A EP2424284B1 (en) | 2009-04-22 | 2010-01-28 | Method for sending aperiodic channel quality information |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101373094A CN101873647B (zh) | 2009-04-22 | 2009-04-22 | 一种非周期信道质量信息发送方法 |
| CN200910137309.4 | 2009-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
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| EP (1) | EP2424284B1 (zh) |
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| CN (1) | CN101873647B (zh) |
| WO (1) | WO2010121502A1 (zh) |
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| EP2670057A4 (en) * | 2011-01-27 | 2017-06-28 | LG Electronics Inc. | Channel status information feedback method and apparatus in multi-node system |
| JP2018078577A (ja) * | 2010-09-29 | 2018-05-17 | エルジー エレクトロニクス インコーポレイティド | 多重アンテナ支援無線通信システムにおいて効率的なフィードバック方法及び装置 |
| US10326510B2 (en) | 2010-09-29 | 2019-06-18 | Lg Electronics Inc. | Method and apparatus for performing effective feedback in wireless communication system supporting multiple antennas |
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| CN102082636B (zh) * | 2010-08-16 | 2013-05-08 | 电信科学技术研究院 | 一种信道状态信息csi反馈指示方法和基站及系统 |
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| CN103580812B (zh) * | 2012-08-03 | 2019-08-23 | 中兴通讯股份有限公司 | 一种信道状态信息的反馈方法及用户设备 |
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| CN104579542B (zh) * | 2013-10-22 | 2018-05-22 | 中国移动通信集团广东有限公司 | 一种触发终端进行cqi上报的方法、基站及终端 |
| US9848408B2 (en) * | 2013-11-12 | 2017-12-19 | Qualcomm Incorporated | Proactive rank index management in SLTE enabled modem to achieve higher throughput |
| WO2015135157A1 (zh) * | 2014-03-12 | 2015-09-17 | 华为技术有限公司 | 信道质量指示反馈方法、资源调度信息发送方法和装置 |
| EP3282629B1 (en) * | 2015-04-08 | 2020-09-09 | LG Electronics Inc. | Method for reporting channel state and apparatus therefor |
| CN109462463B (zh) | 2016-09-30 | 2020-03-10 | 华为技术有限公司 | 一种信息上报方法及装置 |
| CN109845311B (zh) * | 2016-09-30 | 2022-11-15 | 高通股份有限公司 | 针对动态mimo传输的信道状态信息(csi)捕获 |
| CN108809496B (zh) * | 2017-05-05 | 2023-09-05 | 华为技术有限公司 | 一种信息处理方法以及设备 |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2424284A4 (en) | 2014-01-15 |
| EP2424284B1 (en) | 2016-07-20 |
| CN101873647A (zh) | 2010-10-27 |
| US20120106661A1 (en) | 2012-05-03 |
| JP2012525020A (ja) | 2012-10-18 |
| US8638865B2 (en) | 2014-01-28 |
| CN101873647B (zh) | 2012-07-18 |
| EP2424284A1 (en) | 2012-02-29 |
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