WO2016145952A1 - Procédé et appareil de traitement pour fréquence pilote de mesure d'état de canal - Google Patents

Procédé et appareil de traitement pour fréquence pilote de mesure d'état de canal Download PDF

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Publication number
WO2016145952A1
WO2016145952A1 PCT/CN2016/073115 CN2016073115W WO2016145952A1 WO 2016145952 A1 WO2016145952 A1 WO 2016145952A1 CN 2016073115 W CN2016073115 W CN 2016073115W WO 2016145952 A1 WO2016145952 A1 WO 2016145952A1
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WIPO (PCT)
Prior art keywords
channel state
base station
state measurement
terminal
pilot
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PCT/CN2016/073115
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English (en)
Chinese (zh)
Inventor
赵晶
向际鹰
陈艺戬
鲁照华
郁光辉
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中兴通讯股份有限公司
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Publication of WO2016145952A1 publication Critical patent/WO2016145952A1/fr

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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

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for processing channel state measurement pilots.
  • a transmitting end and a receiving end use a plurality of antennas to obtain a higher rate in a spatial multiplexing manner.
  • an enhanced technology is that the receiving end feeds back channel information to the transmitting end, and the transmitting end uses some transmitting precoding techniques according to the obtained channel information, which can greatly improve the transmission performance.
  • channel feature vector information is used for precoding directly; for multi-user MIMO, more accurate channel information is needed.
  • the downlink reference signals are classified into a Cell-specific Reference Signal (CRS) and a mobile station-specific reference signal (UE-specific Reference).
  • CRS Cell-specific Reference Signal
  • UE-specific Reference UE-specific Reference
  • Signal referred to as DMRS, CSI Reference Signal (CSI-RS), Positioning Reference Signal (PRS), MBSFN-RS, etc.
  • the CRS is a public pilot, which is transmitted in full bandwidth for channel measurement and demodulation, and the CRS pilot dimension corresponds to the number of antenna ports; the DMRS is used for proprietary pilots, is unique to each user, and is transmitted in part of the bandwidth.
  • DMRS pilot dimension corresponds to the number of layers of transmitted data;
  • CSI-RS is channel state information pilot, is public, is transmitted in full bandwidth, is used to measure channel state, CSI-RS guide
  • the frequency dimension corresponds to the number of antenna ports, and the number of transmitting antennas is Nt, and the base station transmits an Nt-dimensional CSI-RS.
  • the CRS is a measurement and demodulation pilot, which is Cell Special, transmits in full bandwidth, and the UE performs channel measurement with the received CRS, and measures channel quality indication (CQI) information, PMI, and rank indication of the current channel. (Rank Indicator, RI for short), and feedback; the UE can also use the received CRS for data demodulation to obtain the data information required by the UE.
  • the CSI-RS is used to measure channel status information and is Cell Special's, which is transmitted at full bandwidth.
  • the CSI-RS is used to measure CQI information, PMI information, and RI information. Compared with CRS, the pilot density of CSI-RS is much lower, and the average RB has only one RE overhead.
  • the DMRS is a demodulation pilot transmitted on the PDSCH and is UE Special.
  • the DMRS signal is precoded together with the user's data.
  • the user receives the DMRS signal, the channel information and the precoding information can be obtained, thereby demodulating the data.
  • the feedback of channel information is mainly The simpler single codebook feedback method is utilized, and the performance of the MIMO transmit precoding technique mainly depends on the accuracy of the codebook feedback.
  • the eigenvector space of the channel matrix is quantized to form the codebook space
  • the transmitter and the receiver jointly save or generate the codebook in real time (same as the transceiver).
  • the receiving end according to the obtained channel matrix H, through certain criteria Select a codeword that best matches the channel
  • the feature vector information of the channel is represented, and the codeword number i is fed back to the transmitting end.
  • the code word number is referred to as a Precoding Matrix Indicator (PMI).
  • PMI Precoding Matrix Indicator
  • the transmitting end finds the corresponding precoding codeword according to the serial number i Thereby obtaining channel information.
  • the minimum feedback unit of the channel information is subband channel information, and one subband is composed of a plurality of resource blocks (Resource Blocks, referred to as RBs), and each RB is composed of multiple resource elements (Resource Element). , referred to as RE), RE is the smallest unit of time-frequency resources in LTE, and LTE-A uses the resource representation method of LTE.
  • RBs resource blocks
  • RE resource elements
  • LTE-A uses the resource representation method of LTE.
  • the channel state information (CSI) feedback includes: channel quality indication (CQI) information, PMI, and rank indicator (Rank Indicator, Referred to as RI).
  • CQI channel quality indication
  • PMI PMI
  • rank indicator Rank Indicator
  • RI rank Indicator
  • CQI is an indicator to measure the quality of downlink channels.
  • CQI is represented by an integer value of 0 to 15, which respectively represent different CQI levels, and different CQIs correspond to respective modulation modes and code rates (MCS).
  • MCS modulation modes and code rates
  • the RI is used to describe the number of spatially independent channels, corresponding to the rank (Rank) of the channel response matrix.
  • the UE needs to feed back RI information, and other modes do not need to feed back RI information.
  • the rank of the channel matrix corresponds to the number of layers.
  • Multi-antenna technology is a key technology to cope with the explosive growth of wireless data services.
  • the multi-antenna technology supported in 4G only supports the maximum 8-port horizontal dimension beamforming technology, and has a great potential to further greatly increase system capacity.
  • Massive MIMO Massive MIMO
  • the main features of the Massive MIMO system are: large-scale antenna arrays on the base station side, such as 64 or 128 antennas, and even more, in the data.
  • MU-MIMO technology When transmitting, MU-MIMO technology is used to simultaneously multiplex multiple users at the same frequency.
  • the ratio of the number of antennas to the number of multiplexed users is maintained at about 5-10 times. It can be proved that the correlation coefficient between the channels of any two users is exponentially attenuated as the number of antennas increases, whether in the strong correlation channel in the line-of-sight environment or the uncorrelated channel under rich scattering, such as when configured on the base station side.
  • the correlation coefficient between channels of any two users approaches 0, that is, the multi-user corresponding channels are close to orthogonal.
  • large arrays can bring a very large array gain and diversity gain.
  • each channel transmits a channel measurement pilot CSI-RS
  • the terminal detects the CSI-RS and obtains a channel matrix corresponding to each transmission resource through channel estimation, according to the channel matrix.
  • This method is applied in massive MIMO.
  • the main manifestation is that, first, as the number of antennas increases, the pilot overhead becomes larger and larger, and excessive pilot overhead can seriously affect the performance of the system and increase the complexity of the system.
  • FIG. 1 is related. A schematic diagram of a 2D antenna array of a multi-antenna system in the technology, as shown in FIG.
  • Fractal dimension measurement and feedback is a technique applied to massive MIMO, which requires the base station side to separately transmit the horizontal antenna dimension NtH of the 2D antenna array and the measurement pilot of the vertical antenna dimension Ntv dimension.
  • the base station transmits 8Tx measurement pilots in horizontal dimensions and 8Tx measurement pilots in vertical dimensions.
  • the terminal respectively receives pilot CSI-RS-h and CSI-RS-v of two different dimensions and measures channel state information of each dimension and feeds back CSIH and CSIv.
  • the base station side synthesizes CSI information of different dimensions into Nt-dimensional CSI information.
  • PMI synthesis can use the Kronecker product form in formula (1):
  • the base station precodes the terminal using the synthesized full-dimensional CSI information.
  • the related art solves the problem of large pilot overhead and complicated measurement in the massive MIMO, the performance is greatly limited, and the technique is only suitable for the strong correlation channel.
  • the multipath is complicated and there are many influencing factors.
  • the channel is not strongly correlated, so there is a large performance loss when the fractal dimension feedback is applied.
  • a main object of the present invention is to provide a method and apparatus for processing channel state measurement pilots to at least solve the problem that the channel measurement performance is limited due to the fractal dimension measurement and feedback in the related art.
  • a method for processing a channel state measurement pilot further comprising: the base station dividing the channel state measurement pilot into a specified number group, wherein the channel state measurement pilot is a predetermined number dimension The predetermined number is the number of antennas of the base station; the base station separately sends the channel state measurement pilot to the terminal according to the specified quantity group, where the channel state measurement pilot is used to indicate that the terminal performs a channel
  • the base station receives channel state information that is fed back by the terminal, where the channel state information is used to instruct the base station to perform precoding processing on the terminal, where the specified number of channel state measurement pilots includes a first number of sets of first channel state measurement pilots and a second number of sets of second type channel state measurement pilots; wherein said second number of said second type of channel state measurement pilots are derived from One element or a plurality of elements are respectively selected in each group of the first type of channel state measurement pilots.
  • the number of channel measurement pilots in the specified number of channel state measurement pilots is equal.
  • the sum of the dimensions of the channel state measurement pilots of the specified number of groups is greater than the predetermined number.
  • the terminal transmits the channel state measurement pilot.
  • the sending, by the base station, the channel state measurement pilots to the terminal according to the specified quantity group respectively: the base station sending, to the terminal, the fourth quantity of resource blocks RB according to the specified quantity group The channel state measurement pilot.
  • the channel state measurement pilot is
  • the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.
  • a method for processing a channel state measurement pilot further includes: receiving, by the terminal, a specified number of channel state measurement pilots sent by the base station, where the channel state measurement pilot is a predetermined number of dimensions, the predetermined number being the number of antennas of the base station; the terminal performing channel measurement according to the channel state measurement pilot, and feeding back channel state information to the base station.
  • the manner in which the terminal receives the specified number of group channel state measurement pilots sent by the base station includes one of the following: the terminal receives the specified number of channel state measurement pilots that are sent by the base station in a third number of subframes. Receiving, by the terminal, the specified number of channel state measurement pilots that are sent by the base station on a fourth number of resource blocks RB; the terminal receiving the that the base station sends the fifth number of pilot locations Specifies the number of sets of channel state measurement pilots.
  • the manner in which the terminal performs channel measurement according to the channel state measurement pilot includes one of: the terminal performs channel measurement on the subframe; and the terminal is in the fourth quantity of resource blocks.
  • Channel measurements are performed on designated RBs in the RB; the terminal performs channel measurements at designated pilot positions in the fifth number of pilot positions.
  • the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.
  • a processing device for a channel state measurement pilot further includes: a dividing module, configured to divide a channel state measurement pilot into a specified number group, where The channel state measurement pilot is a predetermined number of dimensions, the predetermined number is the number of antennas of the base station, and the sending module is configured to separately send the channel state measurement pilot to the terminal according to the specified quantity group, where the channel state The measurement pilot is used to instruct the terminal to perform channel measurement; the first receiving module is configured to receive channel state information fed back by the terminal, where the channel state information is used to instruct the base station to perform precoding on the terminal Processing, wherein the specified number of group channel state measurement pilots comprises: a first quantity of the first type of channel state measurement pilots and a second quantity of the second type of channel state measurement pilots; wherein the second The second type of channel state measurement pilot of the quantity set is selected by each element from each group of the first type channel state measurement pilots or Elements were grouped.
  • the number of channel measurement pilots in the specified number of channel state measurement pilots is equal.
  • the sum of the dimensions of the channel state measurement pilots of the specified number of groups is greater than the predetermined number.
  • the sending module includes: a first sending unit, configured to separately send the channel state measurement pilot to the terminal according to the specified number of groups on a third number of subframes.
  • the sending module includes: a second sending unit, configured to send the channel state measurement pilot to the terminal according to the specified number group on the fourth number of resource blocks RB.
  • the sending module includes: a third sending unit, configured to send the channel state measurement pilot to the terminal according to the specified number of groups by using a fifth number of pilot positions.
  • the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, cell-specific reference signal CRS.
  • a processing device for a channel state measurement pilot which is located at a terminal side, and further includes: a second receiving module, configured to receive a specified number of channel state measurement pilots sent by the base station, where The channel state measurement pilot is a predetermined number of dimensions, the predetermined number is an antenna number of the base station; and an execution module is configured to perform channel measurement according to the channel state measurement pilot, and feed back channel state information to the base station .
  • the second receiving module includes one of: a first receiving unit, configured to receive the specified number of group channel state measurement pilots sent by the base station on a third number of subframes; and a second receiving unit And configured to receive the specified number of channel state measurement pilots sent by the base station on the fourth number of resource blocks RB, and the third receiving unit is configured to receive, by the base station, the fifth number of pilot positions.
  • the specified number of sets of channel state measurement pilots are specified number of sets of channel state measurement pilots.
  • the execution module includes one of: a first execution unit configured to perform channel measurement on the subframe; and a second execution unit configured to be specified in the fourth number of resource blocks RB The channel measurement is performed on the RB; the third execution unit is configured to perform channel measurement on the designated pilot position in the fifth number of pilot positions.
  • the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.
  • the base station divides the predetermined number of channel state measurement pilots into a specified number group, and then sends a specified number of channel state measurement pilots to the terminal, and the terminal performs channel measurement according to the received state measurement pilot.
  • the method ensures that the base station can obtain better precoding performance, and solves the problem that the channel measurement performance is limited due to the fractal dimension measurement and feedback in the related art, thereby achieving the effect of better utilizing the competitive resources.
  • FIG. 1 is a schematic diagram of a 2D antenna array of a multi-antenna system in the related art
  • FIG. 2 is a flowchart of a processing method of a channel state measurement pilot according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a processing method of a channel state measurement pilot according to an embodiment of the present invention
  • FIG. 4 is a structural diagram 1 of a processing apparatus for channel state measurement pilot according to an embodiment of the present invention.
  • FIG. 5 is a second structural block diagram of a processing apparatus for channel state measurement pilot according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a base station transmitting channel state measurement pilots to a terminal on three TTIs according to an alternative embodiment of the present invention
  • FIG. 7a is a schematic diagram 1 of a discontinuous TTI of periodic transmission according to an alternative embodiment of the present invention.
  • FIG. 7b is a schematic diagram 1 of a discontinuous TTI for aperiodic transmission according to an alternative embodiment of the present invention.
  • FIG. 8a is a schematic diagram 2 of a discontinuous TTI of periodic transmission according to an alternative embodiment of the present invention.
  • FIG. 8b is a schematic diagram 2 of a discontinuous TTI for aperiodic transmission according to an alternative embodiment of the present invention.
  • FIG. 9 is a schematic diagram of transmitting pilots on an RB according to an alternative embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a CSI-RS RE position according to an alternative embodiment of the present invention.
  • FIG. 11 is a schematic diagram 1 of a base station transmitting a CSI-RS according to an alternative embodiment of the present invention.
  • FIG. 12 is a second schematic diagram of a base station transmitting a CSI-RS according to an alternative embodiment of the present invention.
  • FIG. 13 is a schematic diagram 3 of a base station transmitting a CSI-RS according to an alternative embodiment of the present invention.
  • FIG. 14 is a schematic diagram 4 of a base station transmitting a CSI-RS according to an alternative embodiment of the present invention.
  • 15 is a schematic diagram 5 of a base station transmitting a CSI-RS according to an alternative embodiment of the present invention.
  • 16 is a schematic diagram of a base station transmitting measurement pilots according to an alternative embodiment of the present invention.
  • 17 is a schematic diagram of a CSI-RS RE position according to an alternative embodiment of the present invention.
  • FIG. 18a is a third schematic diagram of a continuous TTI of periodic transmission according to an alternative embodiment of the present invention.
  • FIG. 18b is a third schematic diagram of a continuous TTI for aperiodic transmission according to an alternative embodiment of the present invention.
  • 19 is a schematic diagram of transmitting pilots on an RB according to an alternative embodiment of the present invention.
  • 20 is a schematic diagram of a CSI-RS RE position according to an alternative embodiment of the present invention.
  • 21 is a diagram of different 64Tx codebook and channel correlation coefficients in accordance with an alternate embodiment of the present invention.
  • FIG. 2 is a method according to an embodiment of the present invention.
  • a flowchart of a method for processing a channel state measurement pilot, as shown in FIG. 2, the steps of the method include:
  • Step S202 The base station divides the channel state measurement pilot into a specified number group
  • the channel state measurement pilot is a predetermined number of dimensions, where the predetermined number is the number of antennas of the base station;
  • Step S204 The base station separately sends a channel state measurement pilot to the terminal according to the specified quantity group.
  • the channel state measurement pilot is used to instruct the terminal to perform channel measurement.
  • Step S206 The base station receives channel state information fed back by the terminal.
  • the channel state information is used to indicate that the base station performs precoding processing on the terminal, the first quantity group of the first type channel state measurement pilots and the second quantity group of the second type channel state measurement pilots; wherein, the second quantity group The second type of channel state measurement pilot is composed of one element selected from each of the first type of channel state measurement pilots.
  • the base station divides the predetermined number of channel state measurement pilots into a specified number group, and then sends a specified number of channel state measurement pilots to the terminal, and the terminal performs channel measurement according to the received state measurement pilot.
  • the method ensures that the base station can obtain better precoding performance, and solves the problem that the channel measurement performance is limited due to the fractal dimension measurement and feedback in the related art, thereby achieving the effect of better utilizing the competitive resources.
  • the number of channel measurement pilots is equal, and the sum of the dimensions of the channel state measurement pilots of the specified number of groups is greater than a predetermined number.
  • the manner in which the base station separately sends the channel state measurement pilot to the terminal according to the specified number of groups may be implemented as follows:
  • Manner 1 The base station sends channel state measurement pilots to the terminal in a predetermined number of cycles and in a specified number of groups on the third number of subframes.
  • Manner 2 The base station sends channel state measurement pilots to the terminal according to the specified number group on the fourth number of resource blocks RB.
  • Manner 3 The base station uses the fifth number of pilot positions to respectively send channel state measurement pilots to the terminal according to the specified number of groups.
  • the channel state measurement pilot involved in this embodiment includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.
  • FIG. 3 is a flowchart of a method for processing a channel state measurement pilot according to an embodiment of the present invention. As shown in FIG. 3, the steps of the method include:
  • Step S302 The terminal receives a specified number of channel state measurement pilots sent by the base station;
  • the channel state measurement pilot is a predetermined number of dimensions, where the predetermined number is the number of antennas of the base station;
  • Step S304 The terminal performs channel measurement according to the channel state measurement pilot, and feeds back channel state information to the base station.
  • the terminal receives the specified number of channel state measurement pilots respectively, and feeds back the channel state information to the base station according to the channel state measurement pilot, so that the terminal can feed back the channel state information to the base station.
  • Manner 1 The terminal receives a specified number of channel state measurement pilots sent by the base station on the third number of subframes;
  • Manner 2 The terminal receives a specified number of channel state measurement pilots sent by the base station on the fourth number of resource blocks RB;
  • Manner 3 The terminal receives a specified number of channel state measurement pilots transmitted by the base station at a fifth number of pilot positions.
  • the manner in which the terminal performs channel measurement according to the channel state measurement pilot may also include one of the following manners based on the manner in which the terminal receives the specified number of channel state measurement pilots sent by the base station:
  • Manner 1 The terminal performs channel measurement on the subframe
  • Manner 2 The terminal performs channel measurement on a specified RB in the fourth number of resource blocks RB;
  • Manner 3 The terminal performs channel measurement on a designated pilot position in the fifth number of pilot positions.
  • the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.
  • a processing device for the channel state measurement pilot is further provided, and the device is used to implement the foregoing embodiment and the optional implementation manner, and details are not described herein.
  • the term “module” "unit” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 4 is a structural diagram of a processing apparatus for a channel state measurement pilot according to an embodiment of the present invention.
  • the apparatus is located at a base station side.
  • the apparatus further includes: a dividing module 42 configured to measure a channel state.
  • the frequency is divided into a specified number of groups, wherein the channel state measurement pilot is a predetermined number of dimensions, and the predetermined number is the number of antennas of the base station;
  • the sending module 44 is coupled to the splitting module 42 and configured to respectively send the channel state to the terminal according to the specified number of groups.
  • the module 46 is coupled to the sending module 44 and configured to receive channel state information fed back by the terminal, where the channel state information is used to instruct the base station to perform precoding processing on the terminal.
  • the specified number of channel state measurement pilots includes: a first quantity of the first type of channel state measurement pilots and a second quantity of the second type of channel state measurement pilots; wherein, the first type of channel state One element of each group of measurement pilots is selected to form a second number of groups of channel state measurement pilots.
  • the number of channel measurement pilots in the channel state measurement pilot of the specified number group is equal, and the sum of the dimensions of the channel state measurement pilots of the specified number group is greater than the predetermined number.
  • the sending module 42 of the present embodiment optionally includes: a first sending unit, configured to respectively send a channel state measurement pilot to the terminal according to a specified number of groups on a third number of subframes; or a second sending unit And sending, according to the specified number of groups, the channel state measurement pilots to the terminal according to the specified number of groups, or the third sending unit, configured to use the fifth number of pilot positions according to the specified number of groups, respectively, to the terminal Transmit channel status measurement pilot.
  • the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.
  • FIG. 5 is a block diagram of a processing device for a channel state measurement pilot according to an embodiment of the present invention.
  • the device is located on the terminal side.
  • the device further includes: a second receiving module 52, configured to receive by the base station. a specified number of channel state measurement pilots, wherein the channel state measurement pilot is a predetermined number of dimensions, the predetermined number is the number of antennas of the base station; and the execution module 54 is coupled to the second receiving module 52 and configured to be measured according to the channel state. The channel measurement is performed and the channel state information is fed back to the base station.
  • the receiving module 52 may include: a first receiving unit configured to receive a specified number of channel state measurement pilots sent by the base station on the third number of subframes; or a second receiving unit configured to receive the base station a specified number of channel state measurement pilots transmitted on the fourth number of resource blocks RB; or a third receiving unit configured to receive a specified number of channel state measurement pilots transmitted by the base station at the fifth number of pilot positions.
  • the execution module 54 may include: a first execution unit configured to perform channel measurement on a subframe; or a second execution unit configured to perform a channel on a designated RB of the fourth number of resource blocks RB Measuring; or, the third execution unit, is configured to perform channel measurement on a designated pilot position in the fifth number of pilot positions.
  • the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.
  • the optional embodiment provides a method for processing a channel state measurement pilot.
  • the method in this alternative embodiment includes:
  • Step S302 The base station eNB sends an Nt-dimensional channel state measurement pilot to the terminal UE, and the base station eNB divides the Nt-dimensional channel state measurement pilot into M groups and sends them to the terminal UE respectively; where M is a positive integer greater than 1.
  • Step S304 The terminal UE receives the channel measurement pilot transmitted by the base station, performs channel measurement by using the pilot, and feeds back the channel state information reference signal CSI information to the base station.
  • the base station synthesizes Ct information of the Nt dimension according to the CSI information and the pilot packet situation fed back by the terminal, and precodes the terminal by using the Nt-dimensional CSI information.
  • the base station may be configured by the base station, and the base station separately sends M sets of channel state measurement guides to the terminal in the N1 subframes.
  • Frequency wherein N1 is a positive integer; N1 is a positive integer less than or equal to M; N1 subframes are periodically transmitted; and a transmission period T of N1 subframes is configured by the base station eNB;
  • the base station sends M sets of channel state measurement pilots to the terminal eNB on the N2 resource block RBs, where N2 is a positive integer, and the N2 is a positive integer less than or equal to M;
  • the base station eNB sends the M group channel state measurement pilots to the terminal eNB by using the N3 sets of pilot positions, where N3 is a positive integer; N3 is a positive integer less than or equal to M; the number of packets M, N1, N2, N3, Can be configured by the base station;
  • the base station notifies the terminal of the N2 RB positions, the terminal performs channel measurement on the predetermined RB position, and feeds back the channel state information to the base station;
  • the base station notifies the terminal by using N3 sets of pilots, and the terminal performs channel measurement at a predetermined pilot position, and feeds back channel state information to the base station;
  • the channel state measurement pilot includes at least a CSI-RS; or the channel state measurement pilot includes at least a CRS;
  • the number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 2.
  • the base station sends 16Tx to the terminal UE.
  • Table 1-1 The correspondence between the antenna number and the group number is shown in Table 1-1.
  • the terminal receives the 4Tx measurement pilot, and uses the pilot to perform channel measurement, obtains 4Tx codebook, CQI and RI, and feeds back CSI information to the base station respectively.
  • the base station receives five CSI information at predetermined positions, the base station obtains the total CQI by using the CQI of the five CSI information, obtains the total RI by using the RI of the five CSI information, and obtains the total by using the PMI of the five CSI information. PMI.
  • the base station performs precoding processing on the terminal by using the obtained total channel information.
  • the number of antennas of the base station eNB is 32, and the number of receiving antennas of the terminal is 2.
  • M the number of receiving antennas of the terminal is 2.
  • Table 2-1 The correspondence between the antenna number and the group number is shown in Table 2-1.
  • the terminal receives the measurement pilot, uses the pilot to perform channel measurement, obtains CSI information, and feeds back to the base station separately.
  • CSI information Table 2-2: 8Tx rank1-2 codebook:
  • the base station obtains the CSI information fed back by the terminal at a predetermined location, assuming:
  • the base station receives five CSI information respectively, the base station obtains the total CQI by using the CQI of the five CSI information, obtains the total RI by using the RI of the five CSI information, and obtains the total PMI by using the PMI of the five CSI information.
  • the calculation method is as follows:
  • the five codewords obtained are:
  • the base station first uses the first 4 codewords to synthesize
  • phase adjustment between the antennas is performed by using the 4-antenna codebook to obtain the final codeword.
  • the base station performs precoding processing on the terminal by using the obtained total channel information.
  • the number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 1.
  • the base station sends a 16Tx channel state measurement pilot to the terminal UE, and the base station divides the channel measurement pilot into M groups, and the base station packet number M can be configured by the base station.
  • Table 3-1 Base station side M value configuration table:
  • the terminal obtains the pilot, measures the channel state, and feeds back the channel state information CSI.
  • the base station receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information, and the calculation method is as shown in the optional embodiment 2.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 1.
  • the TTI 1-3 may be periodically sent, and the sending period is set to T.
  • FIG. 7a is a schematic diagram 1 of a periodic transmission discontinuous TTI according to an alternative embodiment of the present invention
  • FIG. 7b is a non-periodic transmission according to an optional embodiment of the present invention.
  • the terminal obtains the pilot, measures the channel state, and feeds back the channel state information CSI.
  • the base station receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information, and the calculation method is as shown in the optional embodiment 2.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 1.
  • the base station separately goes to the terminal on three TTIs.
  • the channel state measurement pilot is transmitted.
  • the TTI 1-3 may be periodically sent, and the sending period is set to T.
  • FIG. 8a is a schematic diagram of a non-contiguous TTI of periodic transmission according to an alternative embodiment of the present invention
  • FIG. 8b is a non-periodic transmission according to an alternative embodiment of the present invention.
  • the transmission period of the pilot is configured by the base station, as shown in Table 5-1.
  • TTI Total Index Cycle
  • the base station when the base station selects the periodic configuration 1, the base station transmits M measurement pilots to the terminal every 10 TTIs.
  • the terminal obtains the pilot, measures the channel state, and feeds back the channel state information CSI.
  • the base station receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information, and the calculation method is as shown in the optional embodiment 2.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 32, and the number of receiving antennas of the terminal is 4.
  • the base station sends a channel state measurement pilot to the terminal on the five RBs.
  • FIG. 9 is a schematic diagram of transmitting a pilot on the RB according to an alternative embodiment of the present invention. As shown in FIG. 9, the base station sends an 8Tx guide on the RB1-4. Frequency, 4Tx pilot is transmitted on RB5.
  • the terminal obtains the pilot separately, measures the channel state, and feeds back the channel state information CSI.
  • the base station separately receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 2.
  • a channel state measurement pilot is sent to the terminal by using three sets of pilots on the RB of the base station.
  • FIG. 10 is a schematic diagram of a CSI-RS RE position according to an alternative embodiment of the present invention. As shown in FIG. 10, the base station is on the RB1-4. The 8Tx pilot is transmitted and the 4Tx pilot is transmitted on RB5.
  • the terminal obtains the pilot, measures the channel state, and feeds back the channel state information CSI.
  • the base station separately receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 32, and the number of receiving antennas of the terminal is 2.
  • the base station sends a channel state measurement pilot to the terminal by using multiple sets of pilots on multiple TTIs.
  • FIG. 11 is a schematic diagram of a base station transmitting a CSI-RS according to an alternative embodiment of the present invention. As shown in FIG. 11, the base station is on the TTI1. Send 3 sets of pilots and send 2 sets of pilots on TTI2.
  • the terminal obtains pilots respectively at the CSI-RS RE position, measures the channel state, and feeds back the channel state information CSI.
  • the base station separately receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 32, and the number of receiving antennas of the terminal is 2.
  • the base station sends the channel state measurement pilots to the terminal by using multiple sets of pilots on multiple TTIs.
  • FIG. 12 is a schematic diagram of the base station transmitting CSI-RS according to an alternative embodiment of the present invention. As shown in FIG. 12, the base station is on the RB1. Send 2 sets of pilots and send 2 sets of pilots on RB2.
  • the terminal obtains the pilot at the CSI-RS RE position, measures the channel state, and feeds back the channel state information CSI.
  • the base station separately receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 64, and the number of receiving antennas of the terminal is 2.
  • the base station uses multiple RBs to send channel state measurement pilots to the terminal on multiple TTIs.
  • FIG. 13 is a schematic diagram of a base station transmitting CSI-RS according to an alternative embodiment of the present invention. As shown in FIG. 13, the base station utilizes on TTI1. Five RBs transmit five sets of pilots, and four sets of pilots are transmitted on four RBs on TTI2.
  • the terminal obtains the pilot at the set position, measures the channel state, and feeds back the channel state information CSI.
  • the base station receives the CSI information fed back by the terminal at a predetermined location, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 64, and the number of receiving antennas of the terminal is 2.
  • the base station sends the channel state measurement pilots to the terminal by using multiple sets of pilots on multiple RBs of multiple TTIs.
  • FIG. 14 is a schematic diagram of the base station transmitting CSI-RS according to an alternative embodiment of the present invention, as shown in FIG.
  • the base station transmits two sets of pilots on RB1 on TTI1 and three sets of pilots on RB2.
  • the base station transmits two sets of pilots on RB1 on TTI2 and two sets of pilots on RB2.
  • the terminal obtains the pilot at the CSI-RS RE position, measures the channel state, and feeds back the channel state information CSI.
  • the base station separately receives the CSI information fed back by the terminal at a predetermined location, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 64, and the number of receiving antennas of the terminal is 2.
  • the base station sends a 64Tx channel state measurement pilot to the terminal UE, and the base station sends the channel state measurement pilot to the terminal by using multiple sets of pilots on multiple RBs of the multiple TTIs, and the base station configures the terminal to use the TTI number N1 for transmitting the pilot.
  • Table 12-1 Schematic diagram of the M value and TTI number of the base station configuration, as shown in Table 12-1:
  • FIG. 15 is a base station transmitting CSI according to an alternative embodiment of the present invention.
  • RS diagram 5 assuming that the pilot pilot pattern is as shown in Figure 15, two sets of pilots are transmitted on RB1 on TTI1, and three sets of pilots are transmitted on RB2; the base station transmits two sets of pilots on RB1 on TTI2, Two sets of pilots are transmitted on RB2.
  • the terminal obtains the pilot at the location, measures the channel state, and feeds back the channel state information CSI.
  • the base station separately receives the CSI information fed back by the terminal at a predetermined location, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 64, and the number of receiving antennas of the terminal is 2.
  • the base station sends a 64Tx channel state measurement pilot to the terminal UE, and the base station sends the channel state measurement pilot to the terminal by using multiple sets of pilots on multiple RBs of the multiple TTIs, and the base station configures the number of RBs used for transmitting the pilot by the terminal.
  • Table 13-1 Schematic diagram of the M value and RB number of the base station configuration, as shown in Table 13-1:
  • FIG. 16 is a base station transmitting measurement pilot according to an alternative embodiment of the present invention. In the schematic diagram, it is assumed that the pilot pilot pattern is as shown in FIG. 16, and pilots are transmitted using 3 RBs on TTI1-TTI3, respectively.
  • the terminal obtains the pilot at the position of the measurement pilot, measures the channel state, and feeds back the channel state information CSI.
  • the base station separately receives the CSI information fed back by the terminal at a predetermined location, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 2.
  • the base station sends a 16Tx channel state measurement pilot to the terminal UE, and the base station sends the channel state measurement pilot to the terminal by using multiple sets of pilots, and the base station configures the number of sets N3 used for transmitting the pilot for the terminal,
  • Table 14-1 Base station configuration M A list of values and sets, as shown in Table 14-1:
  • FIG. 17 is a CSI according to an alternative embodiment of the present invention.
  • -RS RE position diagram as shown in Figure 17.
  • 8Tx CSI-RS is transmitted using #0 and yellow CSI-RS RE positions
  • 2Tx measurement pilots are transmitted using #2's RE position.
  • the terminal obtains the pilot at the position of the measurement pilot, measures the channel state, and feeds back the channel state information CSI.
  • the base station separately receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 1.
  • the TTI 1-3 may be periodically sent, and the sending period is set to T.
  • FIG. 18a is a schematic diagram of a continuous TTI of periodic transmission according to an optional embodiment of the present invention
  • FIG. 18b is a non-periodic transmission according to an alternative embodiment of the present invention.
  • the transmission period of the pilot is configured by the base station.
  • Table 15-1 The base station configures the pilot transmission period, as shown in Table 15-1:
  • TTI Total Index Cycle
  • the base station when the base station selects the periodic configuration 1, the base station transmits M measurement pilots to the terminal every 10 TTIs.
  • the base station notifies the terminal UE of information such as the number of packets M and the location of the TTI.
  • the terminal obtains the channel state information pilots at predetermined positions, measures the channel state according to the period T, and the like, and feeds the channel state information CSI separately.
  • the base station receives the CSI information fed back by the terminal at a predetermined location, and synthesizes the total CSI information according to the CSI information.
  • the calculation method is as shown in the optional embodiment 2.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 32, and the number of receiving antennas of the terminal is 4.
  • the base station sends a channel state measurement pilot to the terminal on the five RBs.
  • FIG. 19 is a schematic diagram of transmitting a pilot on the RB according to an alternative embodiment of the present invention. As shown in FIG. 19, the base station sends an 8Tx guide on the RB1-4. Frequency, 4Tx pilot is transmitted on RB5. The base station notifies the terminal of the number of packets M and the RB location where the pilot is located.
  • the terminal obtains pilots respectively at predetermined RB positions, and separately measures channel state signals, and respectively feeds channel state information CSI.
  • the base station separately receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • the number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 2.
  • a channel state measurement pilot is sent to the terminal by using three sets of pilots on the RB of the base station.
  • FIG. 20 is a schematic diagram of a CSI-RS RE position according to an alternative embodiment of the present invention. As shown in FIG. 20, the base station is on the RB1-4. The 8Tx pilot is transmitted and the 4Tx pilot is transmitted on RB5. The base station notifies the terminal of the pilot packet case M and the number of pilot sets and locations used.
  • the terminal obtains pilots respectively at predetermined positions, and separately measures channel states, and respectively feeds back channel state information CSI.
  • the base station separately receives the CSI information fed back by the terminal at a predetermined location, and synthesizes the total CSI information according to the CSI information.
  • the base station performs precoding processing on the terminal according to the total CSI information.
  • FIG. 21 is a schematic diagram of different 64Tx codebooks and channel correlation coefficients according to an alternative embodiment of the present invention.
  • the channel is an associated channel
  • the transmitting antenna is 64 antennas and 8 antennas, and different 64 antenna pilot transmissions are compared.
  • Codebook and channel correlation under the codebook feedback method The rightmost line in Figure 1 is the current R128Tx codebook and The matching degree of the channel, the second line on the right side is the correlation coefficient between the selected codebook and the channel under the channel state information transmission and feedback method described in the embodiment.
  • the first line on the left side indicates that the codebook is randomly generated at 64 antennas; the second line on the left side indicates that the 8Tx codebooks of R12 are randomly combined to obtain a 64Tx codebook.
  • the correlation coefficient is not much different from that of the 8Tx R12 codebook.
  • the performance is much better than the 64Tx codebook on the left two lines.
  • the manner in which the terminal activates the unlicensed carrier by itself is used, and the competing resources can be better utilized in the related art.
  • a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device for execution by the computing device and, in some cases, may be performed in a different order than herein.
  • the steps shown or described are either made separately into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
  • the base station is configured to divide the predetermined number of channel state measurement pilots into a specified number group, and then send the specified number of channel state measurement pilots to the channel group.
  • the terminal performs the channel measurement according to the received status measurement pilot to ensure that the base station can obtain better precoding performance, and solves the problem that the channel measurement performance is limited due to the fractal dimension measurement and feedback in the related art, thereby achieving The effect of making better use of competing resources.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et appareil de traitement pour fréquence pilote de mesure d'état de canal, le procédé comportant également les étapes suivantes: une station de base divise la fréquence pilote de mesure d'état de canal en un nombre spécifié de groupes, la fréquence pilote de mesure d'état de canal étant un nombre prédéterminé de dimensions et le nombre prédéterminé étant le nombre d'antennes de la station de base; la station de base envoie respectivement la fréquence pilote de mesure d'état de canal à un terminal selon le nombre spécifié de groupes, la fréquence pilote de mesure d'état de canal étant utilisée pour donner comme consigne au terminal d'effectuer une mesure de canal; la station de base reçoit les informations d'état de canal renvoyées par le terminal, les informations d'état de canal étant utilisées pour donner comme consigne à la station de base d'effectuer un traitement de précodage sur le terminal. Au moyen de la présente invention, le problème rencontré dans la technique apparentée d'une limitation de la mesure des performances de canaux causée par une mesure et un retour d'information en dimension fractale est résolu, et l'effet est en outre obtenu d'une meilleure utilisation des ressources obtenues à partir de la concurrence.
PCT/CN2016/073115 2015-03-13 2016-02-01 Procédé et appareil de traitement pour fréquence pilote de mesure d'état de canal WO2016145952A1 (fr)

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