WO2011134182A1 - Procédé et appareil permettant de sélectionner un mode de transmission de données d'antenne - Google Patents

Procédé et appareil permettant de sélectionner un mode de transmission de données d'antenne Download PDF

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Publication number
WO2011134182A1
WO2011134182A1 PCT/CN2010/073924 CN2010073924W WO2011134182A1 WO 2011134182 A1 WO2011134182 A1 WO 2011134182A1 CN 2010073924 W CN2010073924 W CN 2010073924W WO 2011134182 A1 WO2011134182 A1 WO 2011134182A1
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WIPO (PCT)
Prior art keywords
mode
data transmission
receiving end
transmission mode
determining
Prior art date
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PCT/CN2010/073924
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English (en)
Chinese (zh)
Inventor
肖华华
贾晓山
朱登魁
鲁照华
张万帅
刘锟
Original Assignee
中兴通讯股份有限公司
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Publication of WO2011134182A1 publication Critical patent/WO2011134182A1/fr

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Classifications

    • 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
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
    • 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
    • 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
    • H04B7/0667—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 delayed versions of same signal
    • H04B7/0671—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 delayed versions of same signal using different delays between antennas

Definitions

  • BACKGROUND Multiple Input Multiple Output (MIMO) communication systems require multiple antennas to be placed at the transmitting end and the receiving end.
  • the communication system typically employs spatial diversity techniques and spatial multiplexing techniques.
  • the use of spatial diversity technology can improve the stability of the link, and the use of spatial multiplexing can improve the throughput of the system.
  • Beamforming (BF) is a technique based on the principle of adaptive antennas, which uses antenna arrays to weight each antenna unit by advanced signal processing algorithms. As shown in Figure 1. The data stream is multiplied by the weight on the corresponding physical antenna and sent out. All physical antennas are equivalent to a virtual antenna.
  • Spatial Diversity Beamforming When spatial diversity and beamforming are used in combination, it can be called Spatial Diversity Beamforming (SD + BF for short).
  • One of the transmitting ends is shown in FIG. 2.
  • the antenna is divided into M sub-arrays, and each sub-array is beam-shaped to form a virtual antenna, and a plurality of virtual antennas form a spatial diversity form.
  • Spatial Diversity Beamforming Data streams transmitted on different virtual antennas may be redundant in the time or frequency domain.
  • Cyclic Delay Diversity CDD is a multi-antenna transmit diversity scheme commonly used in Orthogonal Frequency Division Multiplexing (OFDM), which transmits the same frequency on each physical antenna.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the domain data is subjected to different cyclic delays for the OFDM symbols in the time domain to obtain the frequency domain diversity gain.
  • the schematic diagram of the transmitting end is shown in Figure 3.
  • the source is subjected to Inverse Fast Fourier Transform (IFFT) to form i or data, and the corresponding cycle of the corresponding physical antenna is used to perform the corresponding cycle.
  • IFFT Inverse Fast Fourier Transform
  • the cyclic prefix Cyclic Prefix, CP for short
  • CP Cyclic Prefix
  • 1, ⁇ ⁇ ⁇ , ⁇ , ⁇ is the number of physical antennas at the transmitting end, which is generally 0.
  • the combination of CDD and spatial multiplexing forms a technique with both frequency domain diversity gain and high data transmission rate, called Spatial Multiplexing Cyclic Delay Diversity (SM + CDD ).
  • SM + CDD Spatial Multiplexing Cyclic Delay Diversity
  • the antenna is divided into M sub-arrays, each of which is CDD.
  • a virtual antenna is formed, and spatial multiplexing is formed between the virtual antennas.
  • the diversity gain of spatial diversity beamforming is relatively large, the signal-to-noise ratio is generally high, and high-order modulation coding can be used to improve throughput; the coverage is relatively large.
  • Spatial multiplexing cyclic delay diversity can transmit different symbols on different virtual antennas, and the throughput is generally large, but the coverage is relatively small.
  • Wireless channels are generally constantly changing over time, sometimes using spatial diversity beamforming is better, and sometimes using spatial multiplexing cyclic delay diversity is better. In order to improve link stability and system throughput, different data transmission modes need to be selected to adapt to changing channel conditions.
  • the method for selecting an antenna data transmission mode includes: determining, by the transmitting end, channel state information, determining data suitable for the receiving end from spatial diversity beamforming (SD+BF) and spatial multiplexing cyclic delay diversity (SM+CDD) modes Transmit mode; and the sender transmits data using the determined data transmission mode.
  • SD+BF spatial diversity beamforming
  • SM+CDD spatial multiplexing cyclic delay diversity
  • an apparatus for selecting an antenna data transmission mode is provided.
  • the apparatus for selecting an antenna data transmission mode includes: a determining module, configured to determine, according to channel state information, a suitable one from a spatial diversity beamforming (SD+BF) mode and a spatial multiplexing cyclic delay diversity (SM+CDD) mode a data transmission mode at the receiving end; and a transmitting module for transmitting data using the determined data transmission mode.
  • the transmitting end channel state information determines that the spatial diversity beamforming (SD+BF) mode or the spatial multiplexing cyclic delay diversity (SM+CDD) mode is a data transmission mode suitable for the receiving end, and the above is suitable for the receiving end.
  • the data transmission mode transmits antenna data.
  • the invention solves the problem that the data transmission mode is selected in the spatial diversity beamforming and the spatial multiplexing cyclic delay diversity in the related art, and the data transmission mode cannot be flexibly selected according to the channel conditions of the system as spatial diversity beamforming and spatial multiplexing. Loop delay diversity to send data. Using the above technical solutions, added Link stability and increased system throughput.
  • FIG. 1 is a schematic structural diagram of a beamforming (BF) transmitting end in the related art
  • FIG. 2 is a schematic structural diagram of a spatial diversity beamforming (SD+BF) transmitting end in the related art
  • FIG. 4 is a schematic structural diagram of a transmitting end combining SM and CDD in the related art
  • FIG. 5 is a flowchart of a method for selecting an antenna data transmitting mode according to an embodiment of the present invention
  • FIG. 7 is a flowchart of a method for selecting an antenna data transmission mode according to Embodiment 1 of the present invention
  • FIG. 7 is a flowchart of a method for selecting an antenna data transmission mode according to Embodiment 2 of the present invention
  • FIG. 9 is a flowchart of a method for selecting an antenna data transmission mode according to Embodiment 4 of the present invention
  • FIG. 10 is a diagram of a method for selecting an antenna data transmission mode according to Embodiment 5 of the present invention
  • FIG. 11 is a flowchart of a method for selecting an antenna data transmission mode according to Embodiment 6 of the present invention
  • FIG. 12 is a flowchart according to the present invention
  • FIG. 13 is a flowchart of a method for selecting an antenna data transmission mode according to Embodiment 8 of the present invention
  • FIG. 14 is an antenna data transmission mode according to Embodiment 9 of the present invention
  • Flow chart of the selection method 15 is a flowchart of a method for selecting an antenna data transmission mode according to Embodiment 10 of the present invention
  • FIG. 16 is a flowchart of a method for selecting an antenna data transmission mode according to Embodiment 11 of the present invention
  • FIG. 17 is a flowchart according to the present invention.
  • FIG. 18 is a flowchart of a method for selecting an antenna data transmission mode according to Embodiment 13 of the present invention.
  • FIG. 19 is an antenna data transmission according to an embodiment of the present invention;
  • the wireless communication system includes a transmitting end and a receiving end.
  • the transmitting end in the embodiment of the present invention is a device for transmitting data or information, such as a macro base station, a micro base station, etc.
  • the receiving end is a type of terminal for receiving data or information.
  • FIG. 5 is a flowchart of a method of selecting an antenna data transmission mode according to an embodiment of the present invention. As shown in FIG. 5, the method for selecting the antenna data transmission mode includes:
  • the transmitting end determines, according to the channel state information, a data sending mode suitable for the receiving end from a spatial diversity beamforming (SD+BF) mode and a spatial multiplexing cyclic delay diversity (SM+CDD) mode;
  • SD+BF spatial diversity beamforming
  • SM+CDD spatial multiplexing cyclic delay diversity
  • the transmitting end sends data by using a determined data transmission mode.
  • the data transmission mode is selected, and the data transmission mode cannot be flexibly selected according to channel conditions to increase link stability and improve throughput.
  • the technical solution provided by the example can flexibly select the data transmission mode to transmit data for spatial diversity beamforming or spatial multiplexing cyclic delay diversity according to system channel conditions, thereby increasing link stability and improving system throughput. the amount.
  • the above channel state information may include but is not limited to at least one of the following CINR, BER, spatial correlation information.
  • the SR is the error burst rate or the bit error rate, which is fed back to the transmitting end by the receiving end; or the transmitting end is calculated by the calculation method.
  • the CINR includes a CINR in a spatial diversity beamformed data transmission mode or a CINR in a spatial multiplexing cyclic delay diversity data transmission mode. It can be calculated by the receiving end and fed back to the sender, or it can be calculated by the sender itself.
  • the above spatial correlation is represented by a condition number of the channel correlation matrix, that is, the condition number 3 ⁇ 4 is calculated according to the channel correlation matrix R in one or more frames in a selected period as follows:
  • H(k) and ⁇ 0 are the Ath subcarriers in a specific carrier set, respectively
  • the foregoing channel state information includes a CINR
  • the foregoing sending end determines that the data sending mode suitable for the receiving end may further include the following processing:
  • V a xP ⁇ R SDBF , where 3 ⁇ 4 ⁇ represents the multiple input multiple output coding rate of spatial diversity;
  • FIG. 6 is a flowchart of a method of selecting an antenna data transmission mode according to Embodiment 1 of the present invention. As shown in FIG.
  • Step S602 Calculate the signal-to-noise ratio C/NR ⁇ of the receiving end under SD+BF, and use it to check the table to find the suitable one. Modulation corresponding to modulation and coding mode under noise ratio , repeats the number of times R, and calculates the transmission rate in SD+BF mode
  • Step S606 comparing ⁇ and ⁇ , such as ⁇ V ⁇ V, selecting a spatial diversity beamforming mode (ie, determining that the SD+BF mode is a suitable data transmission mode;), otherwise, selecting a spatial multiplexing cyclic delay diversity mode (ie, The SM+CDD mode is determined to be a suitable data transmission mode), and the data of the receiving end is transmitted in the selected data transmission mode.
  • the channel state information includes spatial correlation information
  • the spatial correlation is represented by the condition number 51 of the channel correlation matrix
  • the transmitting end determines the data transmission mode suitable for the receiving end, and may further include the following processing:
  • FIG. 7 is a flowchart of a method for selecting an antenna data transmission mode according to Embodiment 2 of the present invention. As shown in Fig. 7, the transmitting end sets the threshold value 9i in advance.
  • Step S702 Initializing the previous channel correlation matrix R Pre , repeating step S704 in the selected period T until the end of the period T.
  • N e represents the number of carriers included on the carrier set
  • the carrier set used to calculate the channel correlation matrix may be a time-frequency two-dimensional data sub-carrier in a sub-channel corresponding to the uplink data, or a sub-carrier corresponding to the uplink pilot or downlink data sent to the receiving end. Data subcarriers in the corresponding subchannels, etc.
  • Step S708 If the spatial multiplexing loop delay diversity mode is selected, otherwise, the spatial diversity beamforming mode is selected.
  • Step S710 The data of the receiving end is sent in the selected data transmission mode.
  • the foregoing channel state information includes an SR, and the sending end determines that the data sending mode suitable for the receiving end may further include the following processing:
  • FIG. 8 is a flowchart of a method for selecting an antenna data transmission mode according to Embodiment 3 of the present invention. As shown in FIG.
  • Step S802 In the decision period, obtain the BER fed back by the receiving end, or use HARQ or ARQ. Calculate the BER in the current data transmission mode; Step SS04. If ⁇ ⁇ , select the spatial multiplexing cyclic delay diversity mode is better, otherwise the spatial diversity beamforming mode is better.
  • Step S806 Send data by using a selected better data transmission mode.
  • the channel state information includes: BER and CINR, and the foregoing sending end determines that the data sending mode suitable for the receiving end may further include the following processing:
  • the receiver using SM+CDD mode obtain the £: R feedback from the receiver, or calculate the BER in the current data transmission mode by using hybrid automatic retransmission or automatic retransmission, if S£R is greater than the false transmission rate
  • the threshold value determines that the SD+BF mode is suitable for the data transmission mode of the receiving end. Otherwise, it is determined that the SM+CDD mode is a data transmission mode suitable for the receiving end.
  • the data transmission mode suitable for the receiving end can be determined according to the CINR and the BER, so that the data transmission mode can be flexibly selected to transmit data for spatial diversity beamforming and spatial multiplexing cyclic delay diversity.
  • Step S902 For the receiving end using the spatial diversity beamforming mode, Obtaining the CTNR in the spatial diversity beamforming mode, such as CINR > SDBF_ ⁇ , determines that the spatial multiplexing cyclic delay diversity mode is better; otherwise, determining the spatial diversity beamforming mode is better.
  • Step S904 Obtain the SR fed back by the receiving end, or calculate the S£R in the current data sending mode by using HARQ or ARQ for the receiving end using the spatial multiplexing cyclic delay diversity mode;
  • Step S906 Send data by using a selected better data transmission mode.
  • the channel state information includes a signal to noise ratio C/NR, and the transmitting end determines a data transmission mode suitable for the receiving end, and may further include the following processing:
  • (1) Set the first threshold interval [SDBF _ TH ⁇ , SDBF _TH2], and calculate the CINR in SD+BF mode for the receiver using SD+BF mode. If CINR ⁇ SDBF _ ⁇ , then determine The SD+BF mode is suitable for the data transmission mode of the receiving end; for example, CINR > SDBF-TH2, it is determined that the SM+CDD mode is suitable for the data transmission mode of the receiving end; if the C/NR is located in the first threshold interval, the above can be performed.
  • the transmitting end of any one of the following determines a scheme suitable for the data transmission mode of the receiving end to determine that the SD+BF mode or the SM+CDD mode is a data transmission mode suitable for the receiving end;
  • FIG. 10 is a flowchart of a method of selecting an antenna data transmission mode according to Embodiment 5 of the present invention.
  • the sender presets the interval threshold [SDBF THl, SDBF TH2] and
  • Step S 1002 The current data transmission mode is the receiving end of the spatial diversity beamforming; Calculate the CINR in this mode, if CINR ⁇ SDBF THI , then determine the spatial diversity beamforming mode is better; if CINR > SDBF _ ⁇ 2, then determine the spatial multiplexing cyclic delay diversity mode is better;
  • the transmitter performing any of the above mentioned ones determines a scheme suitable for the data transmission mode of the receiving end (see FIG. 5 to FIG. 8 for details) to determine the spatial diversity beamforming mode. Or the spatial multiplexing cyclic delay diversity mode is better.
  • Step S1004 The current data transmission mode is the receiving end of the spatial multiplexing cyclic delay diversity mode; calculating the C/NR in the mode, such as CINR ⁇ SMCDD _ ⁇ , determining the spatial diversity beam The shaping mode is better; if CINR > SMCDD-TH2, it is determined that the spatial multiplexing cyclic delay diversity mode is better; if SCDCD _THl ⁇ CINR ⁇ SMCDD _ ⁇ 2, the transmitting end performing any of the above mentioned ones is determined to be suitable for receiving
  • the scheme of the data transmission mode of the end determines that the spatial diversity beamforming mode or the spatial multiplexing cyclic delay diversity mode is better.
  • Step S1006 The data is transmitted in the selected better data transmission mode.
  • the foregoing sending end determines that the data sending mode suitable for the receiving end may further include the following processing:
  • N1/L is greater than or equal to the predetermined value Tr, it is determined that the SD+BF mode is a data transmission mode suitable for the receiving end; otherwise, it is determined that the SM+CDD mode is a data transmission mode suitable for the receiving end;
  • N2/L is greater than or equal to the predetermined value Tr, it is determined that the SM+CDD mode is a data transmission mode suitable for the receiving end, otherwise, it is determined that the SD+BF mode is a data transmission mode suitable for the receiving end.
  • Tr is a flow chart showing a method of selecting an antenna data transmission mode according to Embodiment 6 of the present invention. As shown in FIG.
  • Step SI 104 performing, at each decision time, a scheme in which the transmitting end of any of the above mentioned ones determines a data transmission mode suitable for the receiving end, and if the spatial diversity beamforming mode is better,
  • Step S1210 The data is transmitted by selecting a better data transmission mode in the next cycle. Enter the next decision cycle.
  • the sending end determines that the data sending mode suitable for the receiving end may further include the following processing: (1) setting a third decision period T3, the unit of T3 being a frame;
  • step (2) the transmitting end determines the data transmission rate trend according to the channel state information; preferably, the channel state information includes C/NR, and step (2) may further include the following processing: A.
  • a plurality of decision points are set, and the CINR in the current data transmission mode is obtained in each decision point, and the number of CINR ⁇ CINR ⁇ in the third decision period is counted, and CINR ⁇ is the second SNR threshold;
  • the channel state information includes a false alarm rate 5ER, and the step (2) may further include the following processing:
  • step 4 (3) It is determined according to the data transmission rate trend that the SD+BF mode or the SM+CDD mode is a data transmission mode suitable for the receiving end.
  • step 4 (3) may further comprise the following processing:
  • Determining a mode corresponding to a data transmission rate is a data transmission mode suitable for the receiving end; preferably, determining a mode corresponding to a data transmission rate between the current data transmission rate and the maximum transmission rate, which may be in a pre-configured rate table. Query, obtain the mode corresponding to the data transmission rate.
  • the rate table is a table pre-configured by the transmitting end according to the following method: a transmission rate corresponding to different modulation and coding modes when using spatial diversity beamforming and a transmission corresponding to different modulation and coding modes when using spatial multiplexing cyclic delay diversity
  • the rates are sorted to form a table, and the direction in which the transmission rate increases is the direction in which the rate increases, and the direction in which the transmission rate decreases is the direction in which the rate decreases.
  • Each row in the table includes a data transmission mode, a modulation and coding scheme, a transmission rate, and a unique index ID (Index).
  • An example is shown in Table 1. In the table, the transmission rate is arranged from small to large.
  • Modulation methods include Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), 16QAM, 64QAM, and encoding rates include 1/2, 2/3, 3 /4, 5/6. Table 1
  • determining a mode corresponding to a data transmission rate between the current data transmission rate and the minimum transmission rate is a data transmission mode suitable for the receiving end; Preferably, a mode corresponding to a data transmission rate is determined between the current data transmission rate and the minimum transmission rate, and may also be queried in a pre-configured rate table to obtain a mode corresponding to the data transmission rate.
  • the decision period N T r is configured at the transmitting end, and the unit of T is a frame, which is the number of small periods in the decision period.
  • the threshold for configuring the SR is that the threshold of the statistic is N, N 2 , which is a positive integer, and N, ⁇ N 2 .
  • the transmitting end performs the following processing on each receiving end in each decision period N to adjust the data transmission rate, and transmits the data by using the modulation coding mode and the data transmission mode corresponding to the data transmission rate.
  • Step S1308 Steps S1304 through S1306 are repeated until the decision period ends or N S ⁇ N 2 .
  • FIG 14 is a flowchart of a method of selecting an antenna data transmission mode according to Embodiment 9 of the present invention.
  • a transmitting end has a plurality of receiving ends in the next month, and the unit of the determining period ⁇ 7 ⁇ ⁇ is configured as a frame at the transmitting end, which is the number of small periods in the judgment period.
  • the threshold for configuring the SR is that the threshold of the statistic is N, N 2 , which is a positive integer, and N, ⁇ N 2 .
  • the transmitting end performs the following processing on each receiving end in each decision period N to adjust the data transmission rate, and transmits the data by using the modulation coding mode and the data transmission mode corresponding to the data transmission rate.
  • Steps S1402 to S1404 The same as steps S1302 to S1304 described above, and details are not described herein again.
  • Step S1408 repeating steps S1404 to S1406 until the end of the decision period or
  • Figure 15 is a flowchart of a method of selecting an antenna data transmission mode according to Embodiment 10 of the present invention.
  • Steps S1502 to S1504 The same as steps S1302 to S1304 described above, and details are not described herein again.
  • Step S1510 Steps S1504 to S1508 are repeated until the end of the decision period or ⁇ N 2 .
  • Step S1512 If ⁇ N 2 , it is determined that the transmission rate trend of the receiving end is rising,
  • Figure 16 is a flow chart showing a method of selecting an antenna data transmission mode in the eleventh embodiment of the present invention. Among them, one sender serves multiple receivers below. The decision period ⁇ ⁇ ⁇ is configured at the transmitting end.
  • the unit of ⁇ is the frame, and ⁇ is the number of small periods in the decision period.
  • the threshold value for configuring the C/NR threshold is N, N 2 , which is a positive integer, and N, ⁇ N 2 .
  • the transmitting end performs the following processing on each receiving end in each decision period N to adjust the data transmission rate, and transmits the data by using the modulation coding mode and the data transmission mode corresponding to the data transmission rate.
  • Step S1604 At the decision time iT, the CINR in the current data transmission mode is obtained.
  • Step S1608 Steps S1604 to S1606 are repeated until the end of the decision period or ⁇ N 2 .
  • Step 4 gathers S1612: Send data by using the data transmission mode corresponding to /4> selected by S1610.
  • Figure 17 is a flow chart showing a method of selecting an antenna data transmission mode according to Embodiment 12 of the present invention. Among them, one sender serves multiple receivers below. The decision period ⁇ ⁇ ⁇ is configured at the transmitting end.
  • the unit of ⁇ is the frame, and ⁇ is the number of small periods in the decision period.
  • the threshold value for configuring the C/NR threshold is N, N 2 , which is a positive integer, and N, ⁇ N 2 .
  • the transmitting end performs the following processing on each receiving end in each decision period N to adjust the data transmission rate, and transmits the data by using the modulation coding mode and the data transmission mode corresponding to the data transmission rate.
  • Steps S1702 to S1704 The same as steps S1602 to S1604 described above, and details are not described herein again.
  • Step S1708 Repeat steps S1704 to S1706 until the end of the decision period or
  • Step S1712 The data is transmitted in the data transmission mode corresponding to the selected data set in step S1710.
  • Figure 18 is a flow chart showing a method of selecting an antenna data transmission mode in the thirteenth embodiment of the present invention. Among them, one sender serves multiple receivers below. Configure the decision period at the transmitting end
  • the unit of ⁇ is the frame, which is the number of small periods in the decision period.
  • the initial value of the configured C/NR is that the threshold of the statistic is N, N 2 , which is a positive integer, and N, ⁇ N 2 .
  • Configure the rate table as shown in Table 1.
  • the transmitting end performs the following processing on each receiving end in each decision period N to adjust the data transmission rate, and transmits the data by using the modulation coding mode and the data transmission mode corresponding to the data transmission rate.
  • Steps S1802 to S1804 The same as steps S1602 to S1604 described above, and details are not described herein again.
  • Step S1810 Steps S1804 to S1808 are repeated until the end of the decision period or ⁇ N 2 .
  • Step S1814 The data is transmitted in the data transmission mode corresponding to the selected data set in step S1812.
  • the selection device of the antenna data transmission mode includes: a determination module 10 and a transmission module 12.
  • a determining module 10 configured to determine, according to channel state information, a data transmission suitable for the receiving end from a spatial diversity beamforming (SD+BF) mode and a spatial multiplexing cyclic delay diversity (SM+CDD) mode Send mode; the sending module 12 is configured to send antenna data by using a determined data transmission mode.
  • the system channel state information can be flexibly selected, and the data transmission mode can be flexibly selected to transmit data for spatial diversity beamforming or spatial multiplexing cyclic delay diversity. This increases the stability of the link and increases the throughput of the system.
  • the above channel state information may include, but is not limited to, at least one of the following: CINR BER spatial correlation information.
  • the SR is the error burst rate or the bit error rate, which is fed back to the sending end by the receiving end.
  • the sending end is calculated.
  • the specific calculation method is mentioned above, and is not described here.
  • the calculation process and the preferred calculation process of the spatial correlation represented by the condition number of the channel correlation matrix are also mentioned above, and are not described herein again.
  • the determining module 10 may further include: a first determining unit 100, configured to determine a modulation order of the signal to noise ratio C/NR ⁇ in the SD+BF mode, a coding rate, an SF , and an encoding repetition number.
  • VsMCDD (XSMCDD > ⁇ M SMCDD X P SMCDD ⁇ R SMCDD, where " WCT5D represents the spatially multiplexed multiple input multiple output coding rate; a third determining unit 108 for determining the larger of V and V, and It is determined that the data transmission mode corresponding to the larger one is a data transmission mode suitable for the receiving end.
  • the working manner of the above-mentioned units in combination with each other can be referred to FIG. 6 , and details are not described herein again.
  • the method further includes: a calculating unit 110, configured to calculate the acquisition, and a fourth determining unit 112, configured to be greater than the conditional threshold value, determining that the SM+CDD mode is It is suitable for the data transmission mode of the receiving end. Otherwise, it is determined that the SD+BF mode is suitable for the data transmission mode of the receiving end.
  • a calculating unit 110 configured to calculate the acquisition
  • a fourth determining unit 112 configured to be greater than the conditional threshold value, determining that the SM+CDD mode is It is suitable for the data transmission mode of the receiving end. Otherwise, it is determined that the SD+BF mode is suitable for the data transmission mode of the receiving end.
  • the determining module 10 may further include: a first setting unit 114, configured to set a first decision period T1, where the unit of T1 is a frame; the first obtaining unit 116 is configured to obtain a certificate of feedback from the receiving end, or utilize Hybrid automatic retransmission or automatic retransmission calculation in current data transmission mode
  • a fifth determining unit 118 configured to determine when the 5ER is less than the false alarm rate threshold S Ro
  • the SM+CDD mode is a data transmission mode suitable for the receiving end, otherwise it is determined that the SD+BF mode is a data transmission mode suitable for the receiving end.
  • the working manners of the foregoing units are combined with each other. See FIG. 8 , and details are not described herein again.
  • the determining module 10 may further include: a second obtaining unit 120, configured to obtain a CINR in the SD+BF mode for the receiving end using the SD+BF mode; and a sixth determining unit 122, configured to be greater than the C/NR The first signal to noise ratio threshold value a) D_H.
  • the SM+CDD mode is determined to be a data transmission mode suitable for the receiving end.
  • the SD+BF mode is a data transmission mode suitable for the receiving end.
  • the third obtaining unit 124 is configured to use the receiving end of the SM+CDD mode. Obtaining the feedback of the receiving end, or calculating the BER in the current data transmission mode by using hybrid automatic retransmission or automatic retransmission; the seventh determining unit 126 is configured to determine when the S£R is greater than the false alarm rate threshold ⁇
  • the SD+BF mode is a data transmission mode suitable for the receiving end. Otherwise, it is determined that the SM+CDD mode is a data transmission mode suitable for the receiving end.
  • the working manners of the foregoing units are combined with each other. See FIG. 9 , and details are not described herein again.
  • a combination of the CINR and each of the above determination schemes may be used to determine whether the SD+BF mode or the SM+CDD mode is suitable for the data transmission mode of the receiving end (ie, a better data transmission mode). See Figure 10.
  • a combination of the decision period and each of the above determination schemes may be used to determine whether the SD+BF mode or the SM+CDD mode is suitable for the data transmission mode of the receiving end. (ie better data delivery method). See Figure 11.
  • the determining module 10 may further include: a second setting unit 128, configured to set a third decision period T3, where the unit of T3 is a frame; the determining unit 130, configured to determine data according to channel state information in the third determining period Transmit rate trend; The eighth determining unit 132 is configured to determine, according to the data transmission rate trend, that the SD+BF mode or the SM+CDD mode is a data transmission mode suitable for the receiving end.
  • the determining unit 130 configured to determine data according to channel state information in the third determining period Transmit rate trend
  • the eighth determining unit 132 is configured to determine, according to the data transmission rate trend, that the SD+BF mode or the SM+CDD mode is a data transmission mode suitable for the receiving end.
  • the antenna data transmission mode selection scheme provided by the foregoing embodiment of the present invention can flexibly select the data transmission mode as spatial diversity according to system channel state information (for example, channel conditions and application scenario changes). Beamforming or spatial multiplexing cyclic delay diversity to transmit data. This increases the stability of the link and increases the throughput of the system.
  • system channel state information for example, channel conditions and application scenario changes.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

La présente invention se rapporte à un procédé et à un appareil permettant de sélectionner un mode de transmission de données d'antenne. Ledit procédé comprend les étapes suivantes : selon les informations d'état de canal, le mode de transmission de données s'adaptant à l'extrémité de réception est déterminé par l'extrémité de transmission à partir du mode de diversité spatiale combinée avec la formation de faisceaux (SD + BF) et du mode de multiplexage spatial combiné avec la diversité de retard cyclique (SM + CDD); et l'extrémité de transmission transmet des données selon le mode de transmission de données déterminé. La solution technique proposée par la présente invention résout ce qui suit : la solution permettant de sélectionner le mode de transmission de données à partir du mode SD + BF et du mode SM + CDD n'existe pas dans l'état de la technique; et l'état de la technique ne permet pas de sélectionner de façon flexible le mode SD + BF ou le mode SM + CDD comme mode de transmission de données selon l'état de canal de système, lorsque des données sont transmises. La présente invention améliore la stabilité de la liaison et améliore le débit du système.
PCT/CN2010/073924 2010-04-28 2010-06-13 Procédé et appareil permettant de sélectionner un mode de transmission de données d'antenne WO2011134182A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1489836A (zh) * 2001-10-31 2004-04-14 ���µ�����ҵ��ʽ���� 无线发射装置和无线通信方法
CN1988410A (zh) * 2005-12-23 2007-06-27 北京邮电大学 一种多自适应天线阵列的无线传输方法
WO2007111449A1 (fr) * 2006-03-24 2007-10-04 Electronics And Telecommunications Research Institute Appareil et procédé de macrodiversité intercellulaire pour fournir un service de diffusion/multidiffusion au moyen mettant en oeuvre une pluralité d'antennes
US20080205539A1 (en) * 2007-02-22 2008-08-28 Cisco Technolgy Inc. Method and System for Achieving Spatial Diversity of a Wireless Communications Network
CN101296012A (zh) * 2007-04-24 2008-10-29 中兴通讯股份有限公司 空频编码级联循环延迟分集的导频插入及分集发射的方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101272226B (zh) * 2007-03-23 2011-08-10 中兴通讯股份有限公司 时分同步码分多址系统室内覆盖的多输入多输出系统和方法
CN101359951B (zh) * 2007-08-02 2012-05-23 联想(北京)有限公司 基于信道质量指示的分集、复用传输确定方法与装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1489836A (zh) * 2001-10-31 2004-04-14 ���µ�����ҵ��ʽ���� 无线发射装置和无线通信方法
CN1988410A (zh) * 2005-12-23 2007-06-27 北京邮电大学 一种多自适应天线阵列的无线传输方法
WO2007111449A1 (fr) * 2006-03-24 2007-10-04 Electronics And Telecommunications Research Institute Appareil et procédé de macrodiversité intercellulaire pour fournir un service de diffusion/multidiffusion au moyen mettant en oeuvre une pluralité d'antennes
US20080205539A1 (en) * 2007-02-22 2008-08-28 Cisco Technolgy Inc. Method and System for Achieving Spatial Diversity of a Wireless Communications Network
CN101296012A (zh) * 2007-04-24 2008-10-29 中兴通讯股份有限公司 空频编码级联循环延迟分集的导频插入及分集发射的方法

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