WO2017194027A1 - Procédé et dispositif de transmission d'informations, et support de stockage informatique - Google Patents

Procédé et dispositif de transmission d'informations, et support de stockage informatique Download PDF

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Publication number
WO2017194027A1
WO2017194027A1 PCT/CN2017/084333 CN2017084333W WO2017194027A1 WO 2017194027 A1 WO2017194027 A1 WO 2017194027A1 CN 2017084333 W CN2017084333 W CN 2017084333W WO 2017194027 A1 WO2017194027 A1 WO 2017194027A1
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WIPO (PCT)
Prior art keywords
transmission
reference signal
antenna port
time interval
transmission mode
Prior art date
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Ceased
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PCT/CN2017/084333
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English (en)
Chinese (zh)
Inventor
张雯
夏树强
石靖
韩祥辉
梁春丽
左志松
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows

Definitions

  • the present disclosure relates to transmission information technologies in the field of wireless communication, and in particular, to a method and apparatus for transmitting information, and a computer storage medium.
  • 5G will support higher speed (Gbps), massive link (1M/Km2), ultra-low latency (1ms), higher reliability, and 100 times energy efficiency improvement. Support new changes in demand.
  • Gbps gigabits
  • M/Km2 massive link
  • ultra-low latency is a key indicator of 5G technology, which directly affects the development of time-limited services such as car networking, industrial automation, remote control, and smart grid.
  • a series of current standards for 5G delay reduction are gradually being advanced.
  • Transmission Time Interval is an important research direction for reducing the current delay. It aims to reduce the current TMS length of 1ms to 0.5ms or even 1-2 orthogonal frequency division multiplexing (OFDM, Orthogonal Frequency Division). Multiplexing) The length of the symbol is reduced by a minimum of the minimum scheduling time, and the single transmission delay can be reduced by multiple times without changing the frame structure.
  • a multicast broadcast single frequency network (MBSFN) subframe or uplink (UL, Up Link) The presence of a subframe may cause a short TTI terminal (UE, User Equipment) configured with a Cell Reference Signal (CRS) transmission mode to transmit data on these subframes, thereby increasing the delay of the UE.
  • UE User Equipment
  • CRS Cell Reference Signal
  • an embodiment of the present disclosure provides a method and apparatus for transmitting information, and a computer storage medium.
  • information is transmitted in a manner that is preset and/or indicated by the base station.
  • the specified TTI satisfies at least one of the following:
  • the designated TTI is within an MBSFN subframe
  • the previous adjacent subframe of the subframe in which the specified TTI is located is an uplink subframe, or an MBSFN subframe, or a special subframe configured to be configured;
  • the designated TTI is notified by the base station.
  • the method further includes at least one of the following:
  • DMRS Demodulation Reference Signal
  • Information is transmitted based on the CRS in some or all of the TTIs outside the specified TTI.
  • the method further includes:
  • the DDRS-based transmission mode is indicated by using the Downlink Control Information (DCI) format to indicate that the Physical Downlink Shared Channel (PDSCH) is used in the specified TTI. transmit information.
  • DCI Downlink Control Information
  • the specified DCI format is DCI format 1A.
  • the DMRS-based transmission information is: performing single-port DMRS transmission information, or performing spatial diversity transmission information based on a two-port DMRS, where The port is preset or configured by the base station.
  • the transmission mode corresponding to the DMRS-based transmission or the transmission mode corresponding to the CRS-based transmission is preset or configured by a base station.
  • the transmission mode corresponding to the DMRS-based transmission is determined by the transmission mode corresponding to the CRS-based transmission.
  • the transmission mode corresponding to the DMRS transmission is: one of TM7, TM8, TM9, and TM10; the transmission mode corresponding to the CRS transmission is: TM1, TM2, TM3, TM4, One of TM5, TM6.
  • the transmission mode corresponding to the DMRS transmission is TM9 or TM10.
  • the CRS port used for transmitting the information is preset or notified by the base station.
  • the information is transmitted by using the first designated antenna port, or the information is transmitted by using the second designated antenna port;
  • the first designated antenna port is a CRS antenna port used by the base station to transmit all CRS antenna ports, or a CRS antenna port used by the base station to transmit a physical broadcast channel (PBCH); the second designated antenna port includes a CRS antenna.
  • the port is a partial port of the CRS antenna port included in the first designated antenna port.
  • the second designated antenna port is all CRS antenna ports included in the specified TTI.
  • the method further includes:
  • the CRS port used for transmitting information is determined by at least one of the following:
  • the third designated antenna port belongs to all or part of the antenna ports of the first designated antenna port except the second designated antenna port.
  • the method further includes:
  • the second designated antenna port is 2 CRS antenna ports
  • the second designated antenna port is 1 CRS antenna port.
  • the method further includes:
  • the second designated antenna port is CRS antenna port 0 and 1, or 2 and 3;
  • the second designated antenna port is CRS antenna port 0 or 1;
  • the second designated antenna port is a CRS antenna port 2 or 3.
  • the information is punctured and transmitted in the MBSFN resource area on the MBSFN subframe of the MBMS (Multimedia Broadcast Multicast Service).
  • MBMS Multimedia Broadcast Multicast Service
  • the CRS is sent in the frequency domain resource corresponding to the downlink control information and/or the downlink data information.
  • the symbol for sending the CRS meets one of the following:
  • a partial symbol in the symbol is in the TTI, and other symbols in the symbol except the partial symbol are in a subframe in which the TTI is located;
  • the method further includes:
  • the information is downlink control information or downlink data information.
  • the specified TTI is the first TTI in the subframe or the first TTI in the time slot;
  • the subframe or the time slot is a subframe or a time slot in the LTE system;
  • the first TTI in the subframe is a TTI in which the start symbol is the first symbol of the subframe; the first TTI in the slot is the start symbol is the first of the slots
  • the TTI of a symbol refers to the TTI that contains the first symbol in the time slot.
  • the transmission unit is configured to transmit information in a specified TTI according to a preset and/or a manner indicated by the base station.
  • the specified TTI satisfies at least one of the following:
  • the designated TTI is within an MBSFN subframe
  • the previous adjacent subframe of the subframe in which the specified TTI is located is an uplink subframe, or an MBSFN subframe, or a special subframe configured to be configured;
  • the designated TTI is notified by the base station.
  • the transmitting unit is further configured to perform at least one of the following:
  • Information is transmitted based on the CRS in some or all of the TTIs outside the specified TTI.
  • the apparatus further includes: a characterization unit configured to: when the CRS-based transmission mode is configured, use the specified DCI format scheduling to indicate that the PDSCH uses the DMRS-based transmission mode to transmit information in the specified TTI.
  • the specified DCI format is DCI format 1A.
  • the DMRS based transmission information is: a single port based DMRS The information is transmitted, or the spatial diversity transmission information is performed based on the two-port DMRS, wherein the port is configured by a preset or a base station.
  • the transmission mode corresponding to the DMRS-based transmission or the transmission mode corresponding to the CRS-based transmission is preset or configured by a base station.
  • the transmission mode corresponding to the DMRS-based transmission is determined by the transmission mode corresponding to the CRS-based transmission.
  • the transmission mode corresponding to the DMRS transmission is: one of TM7, TM8, TM9, and TM10; the transmission mode corresponding to the CRS transmission is: TM1, TM2, TM3, TM4, One of TM5, TM6.
  • the transmission mode corresponding to the DMRS transmission is TM9 or TM10.
  • the CRS port used for transmitting the information is preset or notified by the base station.
  • the transmitting unit is further configured to: use the first designated antenna port to transmit information, or use the second designated antenna port to transmit information in the specified TTI;
  • the first designated antenna port is all the antenna ports of the CRS transmitted by the base station, or all the CRS antenna ports used by the base station to transmit the PBCH; and the CRS antenna port included in the second designated antenna port is the first designated antenna port. Part of the port that contains the CRS antenna port.
  • the second designated antenna port is all CRS antenna ports included in the specified TTI.
  • the apparatus further includes: a determining unit, configured to determine, by at least one of the following, a CRS port used for transmitting information in the specified TTI:
  • the third designated antenna port belongs to all or part of the antenna ports of the first designated antenna port except the second designated antenna port.
  • the second designated antenna port is 2 CRS antenna ports
  • the second designated antenna port is 1 CRS antenna port.
  • the second designated antenna port is CRS antenna port 0 and 1, or 2 and 3;
  • the second designated antenna port is CRS antenna port 0 or 1;
  • the second designated antenna port is a CRS antenna port 2 or 3.
  • the transmitting unit is further configured to perform puncturing and transmitting the information in the MBSFN resource area on the MBSFN subframe that transmits the MBMS service.
  • the CRS is sent in the frequency domain resource corresponding to the downlink control information and/or the downlink data information.
  • the symbol for sending the CRS meets one of the following:
  • a partial symbol in the symbol is in the TTI, and other symbols in the symbol except the partial symbol are in a subframe in which the TTI is located;
  • a computer storage medium provided by an embodiment of the present invention stores a computer program configured to perform a method of transmitting information.
  • the information is transmitted in the following manner: Mode 1: For the TM1 to TM6, if the mode 1A scheduling is used, the single antenna port is used, and the port 7 is used for transmission. .
  • the UE may be configured or determined in a preset manner.
  • Manner 2 Configure/preset candidate TMs or TMs for TM1 to TM6. If it is preset, it is TM9. If it is configured, it can be TM8 or TM9.
  • the UE detects the DCI format according to the DMRS mode. Therefore, in the short TTI technology, the short TTI UE configured with the CRS transmission mode performs information transmission on the MBSFN subframe or the uplink subframe, which reduces the delay of the UE.
  • FIG. 1 is a schematic flowchart diagram of a method for transmitting information according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of an apparatus for transmitting information according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of transmission information according to Embodiment 2 of the present disclosure.
  • FIG. 5 is a second schematic diagram of transmission information according to Embodiment 3 of the present disclosure.
  • FIG. 6 is a third schematic diagram of transmission information according to Embodiment 4 of the present disclosure.
  • the information is transmitted in the following manner: Mode 1: For the scheduling of the TM1 to the TM6, if the scheduling is performed by the format 1A, the single antenna port is used, and the port 7 is used. transmission. Alternatively, in order to perform MU-MIMO between multiple users, the UE may be configured or determined in a preset manner.
  • Method 2 For the TM1 to TM6 UE configuration/preset candidate or rollback TM, if it is preset, it is TM9, if it is configured, it can be TM8, TM9. The UE detects the DCI format according to the DMRS mode.
  • the base station transmits 4 antenna ports, for the TTI containing only two antenna ports, 4 antenna ports are still used for transmission, or only the ports included in the TTI are used for transmission.
  • Mode 1 Punch transmission on the MBSFN subframe, avoiding the reference signal on the port 4.
  • the CRS is sent in the resource area; the second method is: direct puncturing transmission, and the reference signal on port 4 is destroyed.
  • FIG. 1 is a schematic flowchart of a method for transmitting information according to an embodiment of the present disclosure. As shown in FIG. 1 , the method for transmitting information includes the following steps:
  • Step 101 Transmit information in a specified TTI according to a preset and/or a manner indicated by the base station.
  • the specified TTI satisfies at least one of the following:
  • the designated TTI is within an MBSFN subframe
  • the previous adjacent subframe of the subframe in which the specified TTI is located is an uplink subframe, or an MBSFN subframe, or a special subframe configured to be configured;
  • the designated TTI is notified by the base station.
  • the method further includes at least one of the following:
  • Information is transmitted based on the CRS in some or all of the TTIs outside the specified TTI.
  • the method further includes:
  • the DCI format scheduling indicates that the PDSCH transmits information using a DMRS-based transmission mode.
  • the specified DCI format is DCI format 1A.
  • the DMRS-based transmission information is: a single-port-based DMRS transmission information, or a two-port DMRS based on spatial diversity transmission information, where the port is preset or configured by a base station.
  • the transmission mode corresponding to the DMRS-based transmission or the transmission mode corresponding to the CRS-based transmission is preset or configured by a base station.
  • the transmission mode corresponding to the DMRS-based transmission is determined by the transmission mode corresponding to the CRS-based transmission.
  • the transmission mode corresponding to the DMRS transmission is: one of TM7, TM8, TM9, and TM10; the transmission mode corresponding to the CRS transmission is: TM1, TM2, TM3, TM4, One of TM5, TM6.
  • the transmission mode corresponding to the DMRS transmission is TM9 or TM10.
  • the CRS port used for transmitting the information is preset or notified by the base station.
  • the information is transmitted by using the first designated antenna port, or the information is transmitted by using the second designated antenna port;
  • the first designated antenna port is all the antenna ports of the CRS transmitted by the base station, or all the CRS antenna ports used by the base station to transmit the PBCH; and the CRS antenna port included in the second designated antenna port is the first designated antenna port. Part of the port that contains the CRS antenna port.
  • the second designated antenna port is all CRS antenna ports included in the specified TTI.
  • the method further includes:
  • the CRS port used for transmitting information is determined by at least one of the following:
  • the third designated antenna port belongs to all or part of the antenna ports of the first designated antenna port except the second designated antenna port.
  • the second designated antenna port is 2 CRS antenna ports
  • the second designated antenna port is 1 CRS antenna port.
  • the method further includes:
  • the second designated antenna port is CRS antenna port 0 and 1, or 2 and 3;
  • the second designated antenna port is CRS antenna port 0 or 1;
  • the second designated antenna port is a CRS antenna port 2 or 3.
  • the information is punctured in the MBSFN resource area on the MBSFN subframe in which the MBMS service is transmitted.
  • the CRS is sent in the frequency domain resource corresponding to the downlink control information and/or the downlink data information.
  • the symbol for sending the CRS meets one of the following:
  • a partial symbol in the symbol is within the TTI, except for the partial symbol in the symbol Other symbols than the number are in the subframe in which the TTI is located;
  • the method further includes:
  • the information is downlink control information or downlink data information.
  • the specified TTI is the first TTI in the subframe or the first TTI in the time slot;
  • the subframe or the time slot is a subframe or a time slot in the LTE system;
  • the first TTI in the subframe is a TTI in which the start symbol is the first symbol of the subframe; the first TTI in the slot is the start symbol is the first of the slots
  • the TTI of a symbol refers to the TTI that contains the first symbol in the time slot.
  • FIG. 2 is a schematic structural diagram of an apparatus for transmitting information according to an embodiment of the present disclosure. As shown in FIG. 2, the apparatus includes:
  • the specifying unit 21 is configured to specify a TTI
  • the transmitting unit 22 is configured to transmit information in a specified TTI in a manner indicated by a preset and/or a base station.
  • the specified TTI satisfies at least one of the following:
  • the designated TTI is within an MBSFN subframe
  • the previous adjacent subframe of the subframe in which the specified TTI is located is an uplink subframe, or an MBSFN subframe, or a special subframe configured to be configured;
  • the designated TTI is notified by the base station.
  • the transmission unit 22 is further configured to perform at least one of the following:
  • Information is transmitted based on the CRS in some or all of the TTIs outside the specified TTI.
  • the apparatus further includes: a characterization unit 23 configured to: if the CRS-based transmission mode is configured, schedule the representation by using the specified DCI format in the specified TTI
  • the PDSCH transmits information using a DMRS-based transmission mode.
  • the specified DCI format is DCI format 1A.
  • the DMRS-based transmission information is: a single-port-based DMRS transmission information, or a two-port DMRS based on spatial diversity transmission information, where the port is preset or configured by a base station.
  • the transmission mode corresponding to the DMRS-based transmission or the transmission mode corresponding to the CRS-based transmission is preset or configured by a base station.
  • the transmission mode corresponding to the DMRS-based transmission is determined by the transmission mode corresponding to the CRS-based transmission.
  • the transmission mode corresponding to the DMRS transmission is: one of TM7, TM8, TM9, and TM10; the transmission mode corresponding to the CRS transmission is: TM1, TM2, TM3, TM4, One of TM5, TM6.
  • the transmission mode corresponding to the DMRS transmission is TM9 or TM10.
  • the CRS port used for transmitting the information is preset or notified by the base station.
  • the transmitting unit 22 is further configured to: use the first designated antenna port to transmit information, or use the second designated antenna port to transmit information in the specified TTI;
  • the first designated antenna port is all the antenna ports of the CRS transmitted by the base station, or all the CRS antenna ports used by the base station to transmit the PBCH; and the CRS antenna port included in the second designated antenna port is the first designated antenna port. Part of the port that contains the CRS antenna port.
  • the second designated antenna port is all CRS antenna ports included in the specified TTI.
  • the device further includes: a determining unit 24, configured to determine, by at least one of the following, a CRS port used for transmitting information in the specified TTI:
  • the third designated antenna port belongs to all or part of the antenna ports of the first designated antenna port except the second designated antenna port.
  • the second designated antenna port is 2 CRS antenna ports
  • the second designated antenna port is 1 CRS antenna port.
  • the first designated antenna port is CRS antenna port 0, 1, 2, 3, the second designated antenna port is CRS antenna port 0 and 1, or 2 and 3;
  • the second designated antenna port is CRS antenna port 0 or 1;
  • the second designated antenna port is a CRS antenna port 2 or 3.
  • the transmitting unit 22 is further configured to perform puncturing and transmitting the information in the MBSFN resource area on the MBSFN subframe that transmits the MBMS service.
  • the CRS is sent in the frequency domain resource corresponding to the downlink control information and/or the downlink data information.
  • the symbol for sending the CRS meets one of the following:
  • a partial symbol in the symbol is in the TTI, and other symbols in the symbol except the partial symbol are in a subframe in which the TTI is located;
  • each unit in the device for transmitting information may be implemented by a central processing unit (CPU) or a microprocessor (MPU, Micro Processor Unit) located in a device that transmits information. ), or a digital signal processor (DSP, Digital Signal Processor), or Field Programmable Gate Array (FPGA).
  • CPU central processing unit
  • MPU Micro Processor Unit
  • DSP Digital Signal Processor
  • FPGA Field Programmable Gate Array
  • This embodiment provides a method of transmitting information.
  • the short TTI can be a TTI of no more than 7 symbols
  • the proposed method is not limited to application in a short TTI system.
  • the downlink control information and/or the downlink data information are transmitted on the designated TTI.
  • the specified TTI may be a TTI in an MBSFN subframe.
  • an MBSFN subframe includes 12 OFDM symbols, and is divided into 6 TTIs, and each TTI includes 2 OFDM symbols.
  • the TTI is specified as the 6 TTIs. one of the. The actual application is not limited to this division.
  • the previous subframe of the subframe in which the specified TTI is located is an uplink subframe, or an MBSFN subframe, or a special subframe.
  • the subframe #n is an MBSFN subframe, and a partial TTI or all TTIs in the subframe #n+1 are designated TTIs.
  • the method provided in this embodiment is not limited to being applied to the specified TTI, and may be used for all TTIs, or TTIs in odd subframes, or TTIs in even subframes, or notified by an eNB, such as an eNB configuration. TTI in the sub-frame.
  • the actual application is not limited to the above examples.
  • the specified TTI may be a TTI of the special subframe in which the previous subframe of the subframe is configured
  • the special subframe of the specified configuration may be a special subframe of all configurations, or
  • the special subframes of the specified configuration may be special subframes of configuration #0 and configuration #5.
  • the downlink has only 3 symbols, the CRS is too small, and the time interval from the TTI is too Far, if the TTI needs to use the CRS of the previous subframe for channel estimation, the channel estimation performance is not good.
  • the actual application is not limited to the above examples.
  • transmission modes 1 to 10 there are 10 transmission modes, which are transmission modes 1 to 10, and can also be written as TM1 to 10. As follows.
  • Transmission Mode 1 (TM1): Single antenna port transmission.
  • Transmission Mode 2 (TM2): Transmit Diversity Mode.
  • Transmission Mode 3 (TM3): Open Loop Space Division Multiplexing Transmission Mode 4 (TM4) for Large Delay Diversity: Closed Loop Spatial Multiplexing.
  • Transmission Mode 5 (TM5): Multi-user MIMO.
  • Transmission Mode 6 (TM6): Rank 1 transmission.
  • Transmission Mode 7 (TM7): Single stream beamforming.
  • Transmission Mode 8 (TM8): Dual stream beamforming.
  • Transmission Mode 9 Supports up to 8 layers of transmission.
  • Transmission Mode 10 Supports up to 8 layers of transmission (CoMP-enabled transmission mode).
  • the eNB configures a CRS-based transmission mode (TM) for the UE, that is, one of the prior art TM1, 2, 3, 4, 5, and 6, the PDSCH of the UE is demodulated by using the CRS, and the UE detects
  • the format of the downlink control information is the DCI format corresponding to the CRS-based transmission mode.
  • TM4 CRS-based transmission mode
  • two DCI formats namely DCI format 2 and DCI format 1A
  • the DCI format 1A indicates that transmission is performed by using transmit diversity
  • the DCI format 2 indicates that transmission is performed by closed-loop spatial multiplexing. Both transmission methods are based on CRS transmission.
  • a solution is provided in which transmission is performed based on the DMRS within the specified TTI, and transmission is performed based on the CRS in some or all of the TTIs other than the designated TTI.
  • the specified DCI format scheduling is used on the specified TTI to indicate that the PDSCH is transmitted according to the DMRS mode. Since each CRS-based transmission mode supports DCI format 1A transmission, it is preferable to use DCI format 1A to instruct the UE to transmit based on the DMRS mode.
  • the eNB indicates that the UE transmits in a single-port DMRS mode, and the port is preset, such as port 7 or 8, or is indicated by the eNB, and may be implemented to enable two UEs to adopt different antenna ports as MU- MIMO.
  • the UE performs transmission by using a preset DMRS-based transmission mode.
  • Each CRS-based transmission mode corresponds to a DMRS-based transmission mode, such as one of TM7, 8, 9, 10.
  • TM1 and 2 the PMI is not fed back, and can be corresponding to single-layer transmission. It can be rolled back to TM8 and 9 and adopt random precoding.
  • TM3 feedback RI, no feedback PMI, PMI cannot be obtained, and it can correspond to single layer transmission.
  • feedback PMI up to 4 layers of transmission, can be rolled back to TM9.
  • TM5 for single layer transmission, feedback PMI, can be rolled back to TM8 or 9, for TM6, for single layer transmission, feedback PMI can be rolled back to TM8 or 9.
  • all CRS-based transmission modes correspond to TM9.
  • the UE detects the DCI format corresponding to TM9, and uses TM9 for transmission on the PDSCH.
  • the eNB configures the UE with two transmission modes, a DMRS-based transmission mode, and a CRS-based transmission mode, and detects the DMRS-based on the specified TTI.
  • the DCI format corresponding to the transmission mode is transmitted using DMRS.
  • the DCI format corresponding to the CRS-based transmission mode is detected on a part or all TTIs outside the specified TTI, and the CRS is used for transmission.
  • the eNB configures the UE with TM9 and TM4, and transmits the TM4 on the TTI other than the specified TTI.
  • the transmission is performed by using the ME9, for example, using a single layer transmission of port 7, or using the same layer number transmission as the TM4, the port is preset, or is configured by the eNB.
  • the downlink control information is based on CRS transmission, on the specified TTI, the downlink control information is transmitted based on the DMRS, and the adopted antenna port is preset, for example, port 7 is used for single port transmission, or port 7 is adopted. And 9 for spatial diversity transmission, or the adopted antenna port is configured by the eNB, such as configured by RRC signaling.
  • This embodiment provides a method of transmitting information.
  • the short TTI can be a TTI of no more than 7 symbols
  • the proposed method is not limited to application in a short TTI system.
  • the definition of the specified TTI is similar to that of the first embodiment.
  • the number of CRS ports used for transmitting information is preset or configured by the eNB.
  • n antennas may still be used.
  • the port is transmitted.
  • the eNB transmits a total of four antenna ports CRS, which are R 0 , R 1 , R 2 , and R 3 , respectively .
  • the channel estimation of the CRS on the four antenna ports on ⁇ 7 is not limited to such an approach. For example, there are only two ports in TTI#4, namely port#2 and 3. When using TM4 spatial multiplexing, spatial multiplexing can be performed on four antenna ports.
  • n CRS antennas may be used in the specified TTI. Part of the antenna port in the port is transmitted.
  • the eNB sends the CRSs of the four antenna ports in the specified TTI, only two antenna ports may be used for transmission, for example, when the eNB sends the CRS antenna ports 0, 1, 2, and 3, Within the designated TTI, antenna ports 0 and 1, or 2 and 3, or 0 and 2, or 1 and 3, or 1 and 2, or 0 and 3 are used for transmission.
  • only one antenna port may be used for transmission, for example, when the eNB sends the CRS antenna ports 0, 1, 2, and 3, Within the designated TTI, one of the antenna ports 0, 1, 2, 3 is used for transmission.
  • only one antenna port may be used for transmission, for example, when the eNB sends the CRS antenna port 0, 1, at the specified TTI.
  • the antenna port 0 or 1 is used for transmission; or when the NB transmits the CRS antenna ports 2 and 3, the antenna port 2 or 3 is used for transmission in the specified TTI.
  • the eNB sends a total of CRSs of 4 antenna ports, and in TTI#3, only ports #0 and 1 are included.
  • CRS when the transmission mode is transmit diversity, only port #0 and 1 are used for transmit diversity; for example, in TTI#4, only CRSs of port #2 and 3 are included, when the transmission mode is transmit diversity, Only transmit ports #2 and 3 are used for transmit diversity.
  • the antenna port used for the transmission may be determined according to a symbol corresponding to the antenna port other than the CRS antenna port included in the specified TTI and a time interval of the TTI.
  • the antenna port used for transmission is determined by a symbol corresponding to another antenna port closest to the specified TTI before the specified TTI and a time interval of the TTI, where other antenna ports refer to the specified TTI CRS antenna port outside the CRS antenna port.
  • TTI#3 contains port#0 and 1, port #2 and 3 closest to TTI#1 before TTI#3 on symbol #1, symbol #1 and TTI#3 are separated by 5 symbols, using port#2 If the transmission is performed with 3, the performance may be degraded.
  • TTI#3 only port #0 and 1 can be used for transmission.
  • port #0 and 1 can be used for transmit diversity.
  • TTI#2 includes port#2 and 3. Ports #0 and 1 closest to TTI#1 before TTI#2 are on symbol #7, and symbols #7 and TTI#2 are adjacent, so in TTI On #2, when the transmission mode is 2, four antenna ports can be used for transmit diversity.
  • a threshold value may be defined, and when the time interval between the symbol corresponding to the other antenna port closest to the specified TTI and the TTI before the specified TTI is greater than a threshold, only the designation is used.
  • the antenna port included in the TTI is transmitted.
  • the other antenna ports refer to antenna ports other than the antenna ports included in the specified TTI.
  • the antenna port used for transmission is determined by the location of the TTI. For example, TTI#1 uses 2 antenna ports, and TTI#2 uses 4 antenna ports.
  • the eNB informs the UE of the CRS antenna port used, such as 1 bit to indicate whether to use the CRS antenna port in the TTI or the total CRS antenna port.
  • the actual application is not limited to such an indication.
  • This embodiment provides a transmission method on an MBSFN subframe.
  • the short TTI can be a TTI of no more than 7 symbols
  • the proposed method is not limited to application in a short TTI system.
  • the downlink control information of the UE and the PDSCH are punctured and transmitted in the MBSFN resource region.
  • the symbol on the port 4 antenna port can be avoided, or the downlink control information of the UE and the PDSCH can also remove the symbol on the port 4.
  • the downlink control information is in the MBSFN subframe. And transmitting CRS in a frequency domain resource corresponding to the downlink data information. For example, if the frequency domain resources allocated by the eNB to the UE are PRB #0 to 3, the eNB transmits the CRS on the PRBs #0 to 3.
  • the CRS may be transmitted in the specified TTI in the time domain, as shown in FIG. TTI #1 occupies 3 symbols in the MBSFN area, and CRS is transmitted on the first two symbols of the 3 symbols.
  • the number of ports sent by the CRS may be the same as the number of antenna ports sent by the PBCH, or may be only the number of partial antenna ports for transmitting the PBCH.
  • the frequency domain transmission range of the CRS is a frequency domain resource allocated to the UE.
  • the CRS may also be sent in the MBSFN subframe in the time domain, and the frequency domain transmission range is a frequency domain resource allocated to the UE.
  • the CRS may be sent in the manner of extending the CP, as shown in FIG. 5.
  • the CRS may or may not be included, and the UE may perform channel estimation by using the CRS before the TTI.
  • This embodiment provides a method of transmitting information.
  • one subframe is divided into a plurality of TTIs from the first symbol.
  • the method in this embodiment does not limit the method for dividing the TTI.
  • each subframe contains 14 symbols, and each slot contains 7 symbols. Starting from the first symbol, every two symbols are divided into one TTI, which is divided into seven TTIs. Or, a time slot is divided into three TTIs, and the number of symbols included in each TTI in time series is 2, 2, 3, or 3, 2, 2, 2, 3, and 2.
  • the division method of each subframe may be the same. Differently, the division method of each time slot may be the same or different.
  • the downlink control information or the downlink data information is transmitted based on the CRS in the first TTI of one subframe or the first TTI of one slot. That is to say, the downlink control information or the downlink data information is demodulated based on the CRS.
  • the subframe here may be a non-MBSFN subframe, or may also be an MBSFN subframe.
  • the first TTI in the subframe here refers to the start symbol being the TTI of the first symbol of the subframe.
  • the first TTI in the time slot refers to a TTI whose first symbol is the first symbol of the time slot, or a TTI that includes the first symbol in the time slot.
  • each subframe contains 14 symbols, and each slot contains 7 symbols.
  • One time slot is divided into three TTIs, and the number of symbols included in each TTI in time series is 2, 2, and 3, respectively.
  • the first TTI of the subframe is TTI#0
  • the first TTI of the second slot is TTI#3.
  • TTI#0 and 3 regardless of the transmission mode configured by the eNB, it is based on CRS demodulation. Downlink control information or downlink data.
  • embodiments of the present disclosure can be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. Instructions are provided for implementation The steps of a function specified in a block or blocks of a flow or a flow and/or a block diagram of a flow chart.
  • an embodiment of the present invention further provides a computer storage medium, wherein a computer program is configured, and the computer program is configured to perform the method for transmitting information according to an embodiment of the present invention.
  • the information is transmitted in the following manner: Mode 1: For the scheduling of the ATM 1 to the TM6, if the scheduling is performed by using the format 1A, the port 7 is used for transmission.
  • the UE may be configured or determined in a preset manner.
  • Manner 2 Configure/preset candidate TMs or TMs for TM1 to TM6. If it is preset, it is TM9. If it is configured, it can be TM8 or TM9.
  • the UE detects the DCI format according to the DMRS mode. Therefore, in the short TTI technology, the short TTI UE configured with the CRS transmission mode performs information transmission on the MBSFN subframe or the uplink subframe, which reduces the delay of the UE.

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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 un dispositif de transmission d'informations, et un support de stockage informatique. Le procédé consiste : à transmettre, selon un mode prédéfini et/ou un mode ordonné par une station de base, des informations dans un intervalle de temps de transmission (TTI) attribué; à transmettre, sur la base d'un DMRS, des informations dans le TTI attribué; et à transmettre, sur la base d'un CRS, des informations dans une partie des TTI ou tous les TTI à l'exclusion du TTI attribué.
PCT/CN2017/084333 2016-05-13 2017-05-15 Procédé et dispositif de transmission d'informations, et support de stockage informatique Ceased WO2017194027A1 (fr)

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WO2019158002A1 (fr) * 2018-02-13 2019-08-22 华为技术有限公司 Procédé de transmission et dispositif de communication

Citations (1)

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Publication number Priority date Publication date Assignee Title
WO2016048597A1 (fr) * 2014-09-26 2016-03-31 Qualcomm Incorporated Communication de données de commande lte à ultra faible latence

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WO2016048597A1 (fr) * 2014-09-26 2016-03-31 Qualcomm Incorporated Communication de données de commande lte à ultra faible latence

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ZTE ET AL.: "Study on PDSCH Transmission in Shortened TTI", 3GPP TSG RAN WG1 MEETING #85, RL-164642, 27 May 2016 (2016-05-27), XP051096367 *
ZTE: "Downlink RS in Shortened TTI", 3GPP TSG RAN WG1 MEETING #84BIS, RL-162404, 15 April 2016 (2016-04-15), XP051080177 *

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