WO2017075770A1 - Procédé, dispositif et système de transmission de données en liaison montante - Google Patents

Procédé, dispositif et système de transmission de données en liaison montante Download PDF

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Publication number
WO2017075770A1
WO2017075770A1 PCT/CN2015/093772 CN2015093772W WO2017075770A1 WO 2017075770 A1 WO2017075770 A1 WO 2017075770A1 CN 2015093772 W CN2015093772 W CN 2015093772W WO 2017075770 A1 WO2017075770 A1 WO 2017075770A1
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WIPO (PCT)
Prior art keywords
time
base station
downlink data
terminal device
data
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PCT/CN2015/093772
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English (en)
Chinese (zh)
Inventor
李超君
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201580084144.2A priority Critical patent/CN108353388A/zh
Priority to PCT/CN2015/093772 priority patent/WO2017075770A1/fr
Publication of WO2017075770A1 publication Critical patent/WO2017075770A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, and a system for transmitting uplink data.
  • the terminal device receives downlink data or downlink semi-persistent scheduling (SPS) carried by the base station and is transmitted on the Physical Downlink Share Channel (PDSCH).
  • SPS downlink data or downlink semi-persistent scheduling
  • PDSCH Physical Downlink Share Channel
  • the HARQ-ACK (Hybrid Automatic Repeat Request-Acknowledgement) feedback information of the PUCCH (Physical Uplink Control Channel) may be sent to the base station, where the PDSCH is received.
  • the terminal device feeds back ACK (Acknowledgement), and when the PDSCH receives an error, the terminal device feeds back NACK (Non-Acknowledgement).
  • the terminal device also transmits channel state information (CSI, Channel State Information) carried on the PUCCH to the base station.
  • CSI Channel State Information
  • TTI transmission time interval
  • each subframe is further divided into two slots of 0.5 milliseconds, and each slot is composed of 6 or 7 orthogonal frequency division multiplexing symbols (may be simply referred to as symbols) )composition.
  • symbols may be simply referred to as symbols
  • the embodiment of the present invention provides a method, an apparatus, and a system for transmitting uplink data.
  • the technical solution is as follows:
  • a method for transmitting uplink data comprising:
  • the terminal device receives the downlink data sent by the base station, and determines a first sending time according to the downlink data, where the first sending time is a time when the terminal device sends uplink data corresponding to the downlink data to the base station. ;
  • the terminal device sends a reference signal to the base station at a second sending moment before the first sending moment, where the reference signal is used by the base station to demodulate the uplink data;
  • the terminal device sends uplink data to the base station at the first sending moment, where the uplink data is data carried by an uplink physical channel.
  • the downlink data is data that the base station sends to the terminal device, or the downlink data is data that is carried on the downlink physical channel.
  • the downlink data may be service data (for example, service data carried on the PDSCH), higher layer signaling (Higher Layer Signaling), downlink SPS release signaling, or Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the uplink data corresponding to the downlink data may be the receiving state information of the downlink data, or the uplink data indicated by the downlink data, or the uplink data scheduled by the downlink data.
  • the terminal device may receive the downlink data sent by the base station, and determine the sending time of the uplink data corresponding to the received downlink data (which may be referred to as a first sending time). . After receiving the downlink data sent by the base station, the terminal device demodulates the uplink data, and configures the uplink data according to the demodulation result. Therefore, the terminal device needs to complete the uplink data after the uplink data is demodulated.
  • the terminal device needs to send a reference signal for uplink physical channel demodulation to the base station, so that the base station performs channel estimation based on the reference signal, and corrects radio channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • the terminal device may send the uplink data and the reference signal to the base station at the first sending moment and the second sending moment, respectively.
  • the time length of the uplink physical channel is less than 0.5 milliseconds, and the time length of the reference signal is less than or equal to a length of time of the uplink physical channel.
  • the HARQ RTT can be effectively reduced, and in turn, the delay can be reduced.
  • the terminal device sends a second sending moment before the first sending moment
  • the base station sends a reference signal, including:
  • the second sending time is the time that the first sending time is forward L RS , and the L RS is a time length of the reference signal
  • the terminal device sends the reference signal to the base station at the second sending moment.
  • the reference signal is temporally adjacent to the uplink data, which can ensure that the channel value on the time-frequency resource occupied by the uplink data estimated by the base station according to the reference signal is relatively accurate.
  • the downlink data is data carried by the physical downlink shared channel PDSCH or downlink semi-persistent scheduling And releasing the signaling, where the uplink data is a hybrid automatic repeat request corresponding to the downlink data, and the HARQ-ACK information is correctly acknowledged;
  • Determining, by the terminal device, the first sending moment according to the downlink data including:
  • the terminal device determines that the first sending time is a time when the receiving time of the downlink data is delayed by T Delay , and the T Delay is a preset delay interval.
  • the HARQ-ACK information may be used to indicate the receiving state of the data carried by the PDSCH or the downlink semi-persistent scheduling release signaling (which may be referred to as PDSCH or downlink SPS release signaling) carried by the PDCCH, and may also be referred to as HARQ-ACK feedback information. .
  • the delay interval T Delay may be a standard pre-defined, and the terminal device may store the delay interval T Delay .
  • the terminal device can obtain the receiving time of the downlink data.
  • the terminal device may delay the time when the reception time of the downlink data is delayed by the T Delay as the first transmission time of the HARQ-ACK information carried by the terminal device to the base station, where the delay is the preset delay interval. .
  • the setting of the T Delay needs to consider the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where T process is the processing time of the terminal device.
  • the terminal device can have sufficient time to demodulate the received downlink data and configure the uplink data before transmitting the uplink data.
  • the T Delay is 4*L DL
  • the L DL is a transmission time interval TTI of the downlink data.
  • the downlink data has a TTI less than 0.5 milliseconds.
  • the first transmission time is delayed by k*L DL from the reception time of the downlink data, where k is a positive integer, preferably, k is a positive integer greater than or equal to 4, and L DL is a transmission time interval TTI of downlink data.
  • k is a positive integer
  • L DL is a transmission time interval TTI of downlink data.
  • the transmission timing of the HARQ-ACK information is delayed by 4 times the length of the TTI compared to the reception timing of the downlink data, that is, the T Delay is 4*L DL .
  • the downlink data is a high-level instruction, where the high-level instruction includes Signaling at a first transmission time, the uplink data including channel state information CSI.
  • the uplink data is data carried by a physical uplink control channel PUCCH, and the downlink data is The TTI is 1 symbol, the length of the PUCCH is 1 symbol, and the length of the reference signal is 1 symbol;
  • Determining, by the terminal device, the first sending moment according to the downlink data including:
  • the terminal device Determining, by the terminal device, that the first sending time is a time when the receiving time of the downlink data is delayed by 4 symbols;
  • the terminal device sends the reference signal to the base station at a time when the receiving time of the downlink data is delayed by 3 symbols;
  • Sending the uplink data to the base station by the terminal device at the first sending moment including:
  • the terminal device transmits the uplink data carried in the PUCCH to the base station at the time when the reception time of the downlink data is delayed by 4 symbols.
  • the terminal device may send the uplink data carried in the PUCCH to the base station, where the time at which the uplink data is sent (ie, the first sending time) may be a time delay of 4 times the TTI of the downlink data.
  • the length, at this time, the TTI of the downlink data is one symbol, that is, the time at which the first transmission time is determined to be the delay of the reception time of the downlink data by four symbols.
  • the time of sending the reference signal to the base station may be determined.
  • the length of the reference signal is less than or equal to the length of the PUCCH. When the length of the PUCCH is 1 symbol, the length of the reference signal may be 1 symbol.
  • the reference signal is transmitted to the base station, and the uplink data carried by the PUCCH corresponding to the downlink data is transmitted to the base station at the time of delaying the reception of the downlink data by four symbols.
  • the HARQ RTT is reduced to 1/14 of the HARQ RTT when the TTI is 1 ms. Further, since the generation of the RS does not depend on the processing time of the downlink data, it is determined that the transmission time of the PUCCH RS is earlier than the transmission time of the PUCCH, and therefore, increasing the transmission of the RS does not affect the RTT, and is improved. The correct reception probability of the uplink data and the uplink single carrier characteristics are maintained.
  • the uplink data is data carried by a PUCCH, and the TTI of the downlink data is 2 a symbol, the length of the PUCCH is 2 symbols, and the length of the reference signal is 1 symbol or 2 symbols;
  • Determining, by the terminal device, the first sending moment according to the downlink data including:
  • the terminal device Determining, by the terminal device, that the first sending time is a time when the receiving time of the downlink data is delayed by 8 symbols;
  • the terminal device sends the reference signal to the base station at a time when the receiving time of the downlink data is delayed by 7 symbols or 6 symbols;
  • Sending the uplink data to the base station by the terminal device at the first sending moment including:
  • the terminal device transmits the uplink data carried in the PUCCH to the base station at the time when the reception time of the downlink data is delayed by 8 symbols.
  • the terminal device may send the uplink data carried in the PUCCH to the base station, where the time at which the uplink data is sent (ie, the first sending time) may be a time delay of 4 times the TTI of the downlink data.
  • the length, at this time, the TTI of the downlink data is 2 symbols, that is, the time at which the first transmission time is determined to be 8 symbols delayed by the reception time of the downlink data.
  • the time of sending the reference signal to the base station may be determined.
  • the length of the reference signal is less than or equal to the length of the PUCCH.
  • the length of the reference signal may be 1 symbol or 2
  • the terminal device can send the reference signal to the base station at the time when the receiving time of the downlink data is delayed by 7 symbols, when the reference signal has a length of 2 symbols, the terminal device The reference signal may be sent to the base station at the time when the receiving time of the downlink data is delayed by 6 symbols, and the uplink data carried by the PUCCH corresponding to the downlink data may be transmitted to the base station at the time of delaying the reception of the downlink data by 8 symbols.
  • the ARQ RTT is reduced to 1/7 of the HARQ RTT when the TTI is 1 ms. Further, since the generation of the RS does not depend on the processing time of the downlink data, it is determined that the transmission timing of the PUCCH RS is earlier than the transmission timing of the PUCCH. Therefore, increasing the transmission of the RS does not affect the RTT, but also improves the correct reception probability of the uplink data and maintains the uplink single carrier characteristics.
  • a method for transmitting uplink data comprising:
  • the base station sends the downlink data to the terminal device, and determines the first receiving time, where the first receiving time is a time when the base station receives the uplink data corresponding to the downlink data sent by the terminal device;
  • the base station Receiving, by the base station, the uplink data that is sent by the terminal device, where the uplink data is data carried by an uplink physical channel.
  • the base station may send the downlink data carried by the downlink physical channel to the terminal device, and after the transmission, determine the receiving time of the uplink data corresponding to the sent downlink data (which may be referred to as a first receiving time), where the first receiving moment is determined. It may also be performed before the downlink data is transmitted to the terminal device, or both.
  • the base station may receive the reference signal sent by the terminal device at the second receiving moment before the first receiving moment. After receiving the reference signal at the second receiving moment, the base station may perform channel estimation based on the reference signal, and correct radio channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data, and receiving the terminal at the first receiving moment.
  • the uplink data sent by the device may send the downlink data carried by the downlink physical channel to the terminal device, and after the transmission, determine the receiving time of the uplink data corresponding to the sent downlink data (which may be referred to as a first receiving time), where the first receiving moment is determined. It may also be performed before the downlink data is
  • the time length of the uplink physical channel is less than 0.5 milliseconds, and the time length of the reference signal is less than or equal to a length of time of the uplink physical channel.
  • the HARQ RTT can be effectively reduced, and in turn, the delay can be reduced.
  • the base station receives the terminal at a second receiving moment before the first receiving moment Reference signals sent by the device, including:
  • the base station receives the reference signal sent by the terminal device at the second receiving moment.
  • the second receiving moment that is, the receiving moment corresponding to the reference signal
  • T 3 the first reception time
  • T 4 the second reception time
  • the reference signal is temporally adjacent to the uplink data, which can ensure that the channel value on the time-frequency resource occupied by the uplink data estimated by the base station according to the reference signal is relatively accurate.
  • the downlink data is data carried by the physical downlink shared channel (PDSCH) or the downlink semi-persistent scheduling release signaling
  • the uplink data is a hybrid automatic retransmission request corresponding to the downlink data, and the HARQ is correctly acknowledged.
  • PDSCH physical downlink shared channel
  • ACK information ACK information
  • Determining, by the base station, the first receiving moment according to the downlink data including:
  • the base station determines that the first receiving time is a time when the transmission time of the downlink data is delayed by T Delay , and the T Delay is a preset delay interval.
  • the first receiving time may be determined according to the sending time of the downlink data, where the first receiving time may be the time corresponding to the delay after the delay time T Delay .
  • the delay interval T Delay may be a standard pre-defined, and the base station may store the delay interval T Delay .
  • the time of sending the downlink data can be known.
  • the base station may use the time when the transmission time of the downlink data is delayed by the T Delay as the first receiving time of the HARQ-ACK information of the PUCCH or the PUSCH transmitted by the base station, where T Delay is a preset delay interval. .
  • the setting of the T Delay needs to consider the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where T process is the processing time of the terminal device.
  • the terminal device can have sufficient time to demodulate the received downlink data and configure the uplink data before transmitting the uplink data.
  • the T Delay is 4*L DL
  • the L DL is a transmission time interval TTI of the downlink data.
  • the downlink data has a TTI less than 0.5 milliseconds.
  • the first reception time is delayed by k*L DL from the transmission time of the downlink data, where k is a positive integer, preferably, k is a positive integer greater than or equal to 4, and L DL is a transmission time interval TTI of downlink data.
  • k is a positive integer
  • L DL is a transmission time interval TTI of downlink data.
  • the reception time of the HARQ-ACK information is delayed by 4 times the length of the TTI compared to the transmission timing of the downlink data, that is, the T Delay is 4*L DL .
  • the downlink data is a high-level instruction, where the high-level instruction includes Signaling of the first receiving moment, the uplink data includes channel state information CSI.
  • the uplink data is data carried by a PUCCH, and the TTI of the downlink data is 1 a symbol, the length of the PUCCH is 1 symbol, and the length of the reference signal is 1 symbol;
  • Determining, by the base station, the first receiving moment including:
  • the base station Determining, by the base station, that the first receiving time is a time when the sending time of the downlink data is delayed by 4 symbols;
  • Receiving, by the base station, the reference signal sent by the terminal device at the second receiving moment before the first receiving moment including:
  • the base station receives the uplink data carried by the terminal device and is carried by the PUCCH at the time when the transmission time of the downlink data is delayed by 4 symbols.
  • the receiving time of the data carried by the terminal device and transmitted by the PUCCH may be determined according to the sending time.
  • the time at which the uplink data is received (that is, the first receiving time) may be delayed by 4 times than the sending time.
  • the TTI of the downlink data is one symbol, that is, the time at which the first reception time is the delay of the transmission time of the downlink data by four symbols.
  • the time of receiving the reference signal sent by the terminal device may be determined.
  • the length of the reference signal is less than or equal to the length of the PUCCH. When the length of the PUCCH is 1 symbol, the length of the reference signal may be 1 symbol.
  • the reference signal transmitted by the terminal device may be received at a time when the transmission time of the downlink data is delayed by 3 symbols, and the bearer corresponding to the downlink data sent by the terminal device may be received at the time of delaying the transmission of the downlink data by 4 symbols.
  • Uplink data of PUCCH Uplink data of PUCCH.
  • the HARQ RTT is reduced to 1/14 of the HARQ RTT when the TTI is 1 ms. Further, since the generation of the RS does not depend on the processing time of the downlink data, it is determined that the transmission time of the PUCCH RS is earlier than the transmission time of the PUCCH. Therefore, increasing the transmission of the RS does not affect the RTT, and improves the correct reception probability of the uplink data.
  • the uplink single carrier feature is maintained.
  • the uplink data is data carried by a PUCCH, and the TTI of the downlink data is 1 a symbol, the length of the PUCCH is 2 symbols, and the length of the reference signal is 1 symbol or 2 symbols;
  • Determining, by the base station, the first receiving moment including:
  • the base station Determining, by the base station, that the first receiving time is a time when the sending time of the downlink data is delayed by 8 symbols;
  • Receiving, by the base station, the reference signal sent by the terminal device at the second receiving moment before the first receiving moment including:
  • the base station receives the uplink data carried by the terminal device and transmitted by the PUCCH at the time when the transmission time of the downlink data is delayed by 8 symbols.
  • the receiving time of the data carried by the terminal device and transmitted by the PUCCH may be determined according to the sending time.
  • the time at which the uplink data is received (that is, the first receiving time) may be delayed by 4 times than the sending time.
  • the TTI of the downlink data is 2 symbols, that is, the time when the first reception time is 8 bits of the transmission time of the downlink data is determined.
  • the time of receiving the reference signal sent by the terminal device may be determined, and the length of the reference signal is less than or equal to the length of the PUCCH.
  • the length of the reference signal may be 1 symbol, or may be 2 symbols
  • the base station can receive the reference signal sent by the terminal device at the time of delaying the transmission of the downlink data by 7 symbols, when the reference signal has a length of 2 symbols
  • the terminal device may receive the reference signal sent by the terminal device at the time of delaying the transmission of the downlink data by 6 symbols, and may also receive the downlink data corresponding to the downlink data sent by the terminal device at the time of delaying the transmission of the downlink data by 8 symbols.
  • the HARQ RTT is reduced to 1/7 of the HARQ RTT when the TTI is 1 ms. Further, since the generation of the RS does not depend on the processing time of the downlink data, it is determined that the transmission timing of the PUCCH RS is earlier than the transmission timing of the PUCCH. Therefore, increasing the transmission of the RS does not affect the RTT, but also improves the correct reception probability of the uplink data and maintains the uplink single carrier characteristics.
  • a terminal device in a third aspect, includes a receiver, a processor, and a transmitter, where:
  • the receiver is configured to receive downlink data sent by a base station
  • the processor is configured to determine, according to the downlink data that is received by the receiver, a first sending time, where the first sending time is that the terminal device sends, to the base station, a downlink data corresponding to the downlink data.
  • the time of the uplink data is configured to determine, according to the downlink data that is received by the receiver, a first sending time, where the first sending time is that the terminal device sends, to the base station, a downlink data corresponding to the downlink data. The time of the uplink data;
  • the transmitter is configured to send a second transmission before the first sending moment determined by the processor Sending a reference signal to the base station, where the reference signal is used by the base station to demodulate the uplink data; and at the first sending moment determined by the processor, sending an uplink to the base station Data, where the uplink data is data carried by an uplink physical channel.
  • the time length of the uplink physical channel is less than 0.5 milliseconds, and the time length of the reference signal is less than or equal to a length of time of the uplink physical channel.
  • the processor is specifically configured to:
  • the processor Determining, by the processor, that the first sending time is the time that the first sending time is forward L RS , and the L RS is a time length of the reference signal;
  • the transmitter is specifically configured to:
  • the downlink data is data carried by the physical downlink shared channel PDSCH or downlink semi-persistent scheduling And releasing the signaling, where the uplink data is a hybrid automatic repeat request corresponding to the downlink data, and the HARQ-ACK information is correctly acknowledged;
  • the processor is specifically configured to:
  • the first sending time is a time when the receiving time of the downlink data received by the receiver is delayed by T Delay , and the T Delay is a preset delay interval.
  • the T Delay is 4*L DL
  • the L DL is a transmission time interval TTI of the downlink data.
  • the downlink data has a TTI less than 0.5 milliseconds.
  • the downlink data is a high-level instruction, where the high-level instruction includes Signaling at a first transmission time, the uplink data including channel state information CSI.
  • the uplink data is data carried by a physical uplink control channel (PUCCH)
  • the TTI of the downlink data is 1 symbol
  • the length of the PUCCH is 1 symbol.
  • the length of the reference signal is 1 symbol;
  • the processor is specifically configured to:
  • the first sending time is a time when the receiving time of the downlink data received by the receiver is delayed by 4 symbols;
  • the transmitter is specifically configured to:
  • the uplink data is data carried by a PUCCH
  • the TTI of the downlink data is 2 symbols
  • the length of the PUCCH is 2 symbols
  • the reference signal is The length of time is 1 symbol or 2 symbols;
  • the processor is specifically configured to:
  • the first sending time is a time when the receiving time of the downlink data received by the receiver is delayed by 8 symbols
  • the transmitter is specifically configured to:
  • the base station And transmitting, by the base station, the reference signal to the base station at a time when the receiving time of the downlink data received by the receiver is delayed by 7 symbols or 6 symbols; and the downlink data received by the receiver When the reception time is delayed by 8 symbols, the uplink data carried in the PUCCH is transmitted to the base station.
  • a base station comprising a receiver, a processor, and a transmitter, where:
  • the transmitter is configured to send downlink data to the terminal device
  • the processor is configured to determine a first receiving moment, where the first receiving moment is a moment when the base station receives uplink data that is sent by the terminal device and that is corresponding to the downlink data;
  • the receiver is configured to receive a reference signal sent by the terminal device at a second receiving moment before the first receiving moment that is determined by the processor, where the reference signal is used by the base station solution Adjusting the uplink data; receiving the uplink data sent by the terminal device at the first receiving moment determined by the processor, where the uplink data is data carried by an uplink physical channel.
  • the time length of the uplink physical channel is less than 0.5 milliseconds, and the time length of the reference signal is less than or equal to a length of time of the uplink physical channel.
  • the processor is specifically configured to:
  • the second receiving moment is a time when the first receiving time determined by the processor is forward L RS , and the L RS is a time length of the reference signal;
  • the receiver is specifically configured to:
  • the downlink data is data carried by the physical downlink shared channel PDSCH or downlink semi-persistent scheduling And releasing the signaling, where the uplink data is a hybrid automatic repeat request corresponding to the downlink data, and the HARQ-ACK information is correctly acknowledged;
  • the processor is specifically configured to:
  • the T Delay is a preset delay interval.
  • the T Delay is 4*L DL
  • the L DL is a transmission time interval TTI of the downlink data.
  • the downlink data has a TTI less than 0.5 milliseconds.
  • the downlink data is a high-level instruction, where the high-level instruction includes Signaling of the first receiving moment, the uplink data includes channel state information CSI.
  • the uplink data is data carried by a PUCCH, and the TTI of the downlink data is 1 a symbol, the length of the PUCCH is 1 symbol, and the length of the reference signal is 1 symbol;
  • the processor is specifically configured to:
  • the first receiving time is a time when the sending time of the downlink data sent by the transmitter is delayed by 4 symbols;
  • the receiver is specifically configured to:
  • the terminal device Receiving, by the terminal device, the reference signal sent by the terminal device at a time when the transmission time of the downlink data sent by the transmitter is delayed by 3 symbols; delaying the sending time of the downlink data sent by the transmitter At the time of 4 symbols, the uplink data carried by the terminal device and carried by the PUCCH is received.
  • the uplink data is data carried by the PUCCH
  • the TTI of the downlink data is 1 symbol
  • the length of the PUCCH is 2 symbols
  • the length of the reference signal is 1 Symbol or 2 symbols
  • the processor is specifically configured to:
  • the first receiving time is a time when the sending time of the downlink data sent by the transmitter is delayed by 8 symbols;
  • the receiver is specifically configured to:
  • a fifth aspect provides a terminal device, where the terminal device includes:
  • a receiving module configured to receive downlink data sent by the base station
  • a determining module configured to determine, according to the downlink data, a first sending moment, where the first sending moment is a moment when the terminal device sends uplink data corresponding to the downlink data to the base station;
  • a sending module configured to send, to the base station, a reference signal, where the reference signal is used by the base station to demodulate the uplink, at a second sending time before the first sending moment that is determined by the determining module
  • the data is sent to the base station at the first sending time determined by the determining module, where the uplink data is data carried by an uplink physical channel.
  • the time length of the uplink physical channel is less than 0.5 milliseconds, and the length of the reference signal is less than or equal to a length of time of the uplink physical channel.
  • the determining module is further configured to:
  • the determining Determining, by the determining, that the first sending time is the time that the first sending time is forward L RS , and the L RS is a time length of the reference signal;
  • the sending module is specifically configured to:
  • the downlink data is data carried by the physical downlink shared channel PDSCH or downlink semi-persistent scheduling And releasing the signaling, where the uplink data is a hybrid automatic repeat request corresponding to the downlink data, and the HARQ-ACK information is correctly acknowledged;
  • the determining module is specifically configured to:
  • the T Delay is a preset delay interval.
  • the T Delay is 4*L DL
  • the L DL is a transmission time interval TTI of the downlink data.
  • the downlink data has a TTI less than 0.5 milliseconds.
  • the downlink data is a high-level instruction, where the high-level instruction includes Signaling at a first transmission time, the uplink data including channel state information CSI.
  • the uplink data is data carried by a physical uplink control channel PUCCH, and the downlink data is The TTI is 1 symbol, the length of the PUCCH is 1 symbol, and the length of the reference signal is 1 symbol;
  • the determining module is specifically configured to:
  • the first sending time is a time when the receiving time of the downlink data is delayed by 4 symbols
  • the sending module is specifically configured to:
  • the uplink data is data carried by a PUCCH, and the TTI of the downlink data is 2 a symbol, the length of the PUCCH is 2 symbols, and the length of the reference signal is 1 symbol or 2 symbols;
  • the determining module is specifically configured to:
  • the first sending time is a time when the receiving time of the downlink data is delayed by 8 symbols
  • the sending module is specifically configured to:
  • the base station Transmitting the reference signal; and transmitting uplink data carried by the PUCCH to the base station at a time when the receiving time of the downlink data is delayed by 8 symbols.
  • a base station where the base station includes:
  • a sending module configured to send downlink data to the terminal device
  • a determining module configured to determine a first receiving moment, where the first receiving moment is a moment when the base station receives uplink data that is sent by the terminal device and that is corresponding to the downlink data;
  • a receiving module configured to receive a reference signal sent by the terminal device at a second receiving moment before the first receiving moment determined by the determining module, where the reference signal is used by the base station demodulation
  • the uplink data is received, and the uplink data sent by the terminal device is received at the first receiving time determined by the determining module, where the uplink data is data carried by an uplink physical channel.
  • the time length of the uplink physical channel is less than 0.5 milliseconds, and the time length of the reference signal is less than or equal to a length of time of the uplink physical channel.
  • the determining module is further configured to:
  • the second receiving moment is a time when the first receiving moment determined by the determining module is forward L RS , and the L RS is a time length of the reference signal;
  • the receiving module is specifically configured to:
  • the downlink data is data carried by the physical downlink shared channel PDSCH or downlink semi-persistent scheduling And releasing the signaling, where the uplink data is a hybrid automatic repeat request corresponding to the downlink data, and the HARQ-ACK information is correctly acknowledged;
  • the determining module is specifically configured to:
  • the T Delay is a preset delay interval.
  • the T Delay is 4*L DL
  • the L DL is a transmission time interval TTI of the downlink data.
  • the downlink data has a TTI less than 0.5 milliseconds.
  • the downlink data is a high-level instruction, where the high-level instruction includes Signaling of the first receiving moment, the uplink data includes channel state information CSI.
  • the uplink data is data carried by a PUCCH, and the TTI of the downlink data is 1 a symbol, the length of the PUCCH is 1 symbol, and the length of the reference signal is 1 symbol;
  • the determining module is specifically configured to:
  • the first receiving time is a time when the sending time of the downlink data is delayed by 4 symbols
  • the receiving module is specifically configured to:
  • the uplink data is data carried by a PUCCH, and the TTI of the downlink data is 1 a symbol, the length of the PUCCH is 2 symbols, and the length of the reference signal is 1 symbol or 2 symbols;
  • the determining module is specifically configured to:
  • the first receiving time is a time when the sending time of the downlink data is delayed by 8 symbols
  • the receiving module is specifically configured to:
  • a system for transmitting uplink data comprising a terminal device and a base station, wherein:
  • the base station is configured to send downlink data to the terminal device, and determine a first receiving time, where the first receiving time is a time when the base station receives the uplink data that is sent by the terminal device and is corresponding to the downlink data.
  • the terminal device is configured to receive downlink data sent by the base station, and determine, according to the downlink data, a first sending time, where the first sending time is that the terminal device sends, to the base station, a downlink data corresponding to the downlink data. Time of uplink data; transmitting a reference signal to the base station at a second transmission time before the first transmission time; and transmitting uplink data to the base station at the first transmission time.
  • the downlink data sent by the base station is received, and the first sending time is determined according to the downlink data, and the reference signal is sent to the base station at the second sending time before the first sending time, and is sent to the base station at the first sending time.
  • the uplink data is data carried by the uplink physical channel.
  • the base station can perform uplink data demodulation according to the reference signal sent by the terminal device, which can improve the correct reception probability of the uplink data.
  • the uplink data can also be sent as early as possible to reduce the air interface delay.
  • FIG. 1 is a schematic diagram of a system framework provided by an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for transmitting uplink data according to an embodiment of the present invention.
  • FIG. 5(a) is a schematic diagram of a transmission time according to an embodiment of the present invention.
  • FIG. 5(b) is a schematic diagram of a transmission time according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a method for transmitting uplink data according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of a method for transmitting uplink data according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a method for transmitting uplink data according to an embodiment of the present invention.
  • FIG. 9(a) is a schematic diagram of a receiving moment according to an embodiment of the present invention.
  • FIG. 9(b) is a schematic diagram of a receiving moment according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of a method for transmitting uplink data according to an embodiment of the present invention.
  • FIG. 11 is a flowchart of a method for transmitting uplink data according to an embodiment of the present invention.
  • FIG. 12 is a flowchart of a method for transmitting uplink data according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the embodiment of the present invention provides a method for transmitting uplink data, which may be implemented by a terminal device and a base station, where the terminal device may also be referred to as a user equipment (User Equipment, referred to as "UE") and a mobile station ( Mobile Station, referred to as "MS", mobile terminal, etc., the terminal device can communicate with one or more core networks via a Radio Access Network (RAN), for example,
  • RAN Radio Access Network
  • the terminal device may be a mobile phone (or "cellular" phone), a computer with a mobile terminal, etc., for example, the terminal device may also be a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device, which is wireless
  • the access network exchanges languages and/or data.
  • the base station may be a base station (Base Transceiver Station, abbreviated as "BTS”) in GSM or CDMA, or a base station (NodeB, abbreviated as “NB”) in WCDMA, or an evolved base station in LTE (Evolutional Node) B, abbreviated as "eNB or e-NodeB”).
  • BTS Base Transceiver Station
  • NodeB base station
  • eNB evolved base station in LTE (Evolutional Node) B
  • eNB or e-NodeB evolved base station in LTE (Evolutional Node) B
  • the terminal device may include a receiver 210, a processor 220, a transmitter 230, and the receiver 210 and the transmitter 230 may be respectively connected to the processor 220, as shown in FIG.
  • the receiver 210 can be used to send and receive messages or data.
  • the receiver 210 can include, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a coupler, an LNA (Low Noise Amplifier), and a dual Tools, etc.
  • the processor 220 may be a control center of the terminal device, and connects various parts of the entire terminal device, such as the receiver 210 and the transmitter 230, using various interfaces and lines.
  • the processor 220 may be configured to determine a correlation process of the transmission time of the uplink data.
  • the processor 220 may include one or more processing units; preferably, the processor 220 may integrate the application processor and the modulation.
  • a demodulation processor wherein the application processor primarily processes an operating system, and the modem processor primarily processes wireless communications.
  • Processor 220 can also be a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic device or the like.
  • the base station can include a receiver 310, a processor 320, a transmitter 330, a receiver 310, and a transmitter 330 that can be respectively coupled to the processor 320, as shown in FIG.
  • the receiver 310 can be used to send and receive messages or data.
  • the receiver 310 can include, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a coupler, an LNA (Low Noise Amplifier), and a dual Tools, etc.
  • the processor 320 may be configured to determine related processing of the reception time of the uplink data
  • the processor 320 may include one or more processing units;
  • the processor 320 may be a general purpose processor, including a central processing unit (Central Processing) Unit, referred to as CPU), Network Processor (NP), etc.; can also be digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device Wait.
  • the program can include program code, the program code including computer operating instructions.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UDD Universal Mobile Telecommunication System
  • UMTS Universal Mobile Telecommunication System
  • OFDM orthogonal frequency division
  • the LTE system is taken as an example, but the embodiment of the present invention is not applicable to the LTE system.
  • any wireless communication system that performs data transmission by scheduling may adopt the solution provided by the embodiment of the present invention.
  • each radio frame is composed of 10 subframes of 1 ms length, and each subframe includes 2 slots.
  • each slot consists of 7 symbols, that is, each slot is numbered ⁇ #0, #1, #2, #3, #4, #5 , symbolic composition of #6 ⁇ ;
  • each slot consists of 6 symbols, that is, each slot is numbered ⁇ #0, #1, #2,# 3, #4, #5 ⁇ symbol composition.
  • the uplink symbol is called a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol. It should be noted that if the subsequent technology introduces an orthogonal multiple access method of Orthogonal Frequency Division Multiple Access (OFDMA), the uplink symbol may also be referred to as an OFDM symbol. In the embodiment of the present invention, the SC-FDMA symbol and the OFDMA symbol are simply referred to as symbols.
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • the physical channel carries data information from a higher layer, for example, a PUCCH carrying HARQ-ACK information and CSI, and a physical uplink shared channel (PUSCH) carrying uplink data.
  • a physical signal is used for the physical layer and does not carry data information from a higher layer.
  • the physical signal is a reference signal (RS), for example, a demodulation reference signal for the PUCCH (Demodulation Reference) Signal, DMRS), demodulation reference signal for PUSCH.
  • RS reference signal
  • DMRS demodulation Reference
  • the base station configures an RS for each physical channel, performs channel estimation based on the RS, and then demodulates the physical channel according to the estimated channel value. Therefore, in the present invention, the RS corresponding to the physical channel, that is, the RS for physical channel demodulation.
  • the terminal device In order to support downlink adaptive scheduling, the terminal device needs to report CSI to the base station.
  • the CSI is channel state information of the downlink carrier, and the CSI includes a CQI (Channel Quality Indicator), a PMI (Precoding Matrix Indicator), a PTI (Precoding Type Indicator), and/or RI (Rank Indicator), etc.
  • CSI reporting includes periodic CSI reporting (Periodic Reporting) and aperiodic CSI reporting (Aperiodic Reporting).
  • Step 401 The terminal device receives the downlink data sent by the base station, and determines the first sending time according to the downlink data, where the first sending time is a time when the terminal device sends the uplink data corresponding to the downlink data to the base station.
  • the downlink data is data that the base station sends to the terminal device, or the downlink data is data that is carried on the downlink physical channel.
  • the downlink data may be service data (for example, service data carried on the PDSCH), higher layer signaling (Higher Layer Signaling), downlink SPS release signaling, or Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the uplink data may be the received status information of the downlink data, or the uplink data indicated by the downlink data, or the uplink data scheduled by the downlink data.
  • the terminal device may receive the downlink data sent by the base station, and determine the sending time of the uplink data corresponding to the received downlink data (may be referred to as the first A sending moment).
  • the first sending moment may be determined in different manners according to the received downlink data.
  • the uplink data is the reception status information of the downlink data, or the uplink data is the HARQ-ACK information corresponding to the downlink data.
  • the downlink data is the data carried by the physical downlink shared channel PDSCH or the downlink semi-persistent scheduling release signaling
  • the uplink data corresponding to the downlink data is the hybrid automatic repeat request and the correct response HARQ-ACK information.
  • the HARQ-ACK information may be carried on a PUCCH or a PUSCH.
  • the HARQ-ACK information may be used to indicate the data received by the PDSCH (which may be simply referred to as PDSCH) or the receiving state of the downlink semi-persistent scheduling release signaling, and may also be referred to as HARQ-ACK feedback information.
  • the HARQ-ACK information includes ACK, NACK, or DTX (Discontinuous Transmission).
  • the terminal device determines whether the received downlink data is correct, and further, may feed back the HARQ-ACK information to the base station.
  • the terminal device feeds back the correct acknowledgement ACK; when the downlink data is received incorrectly, the terminal device feeds back the error acknowledgement NACK; when the downlink data is not received, the terminal device feeds back the DTX.
  • the processing of the step 401 may be as follows: the terminal device receives the downlink data sent by the base station, and determines that the first sending time is the time when the receiving time of the downlink data is delayed by T Delay , and the T Delay is a preset delay interval.
  • the delay interval T Delay can be pre-defined by the standard, and the terminal device can store the delay interval T Delay . After receiving the downlink data, the terminal device can obtain the receiving time of the downlink data. The terminal device may delay the time when the reception time of the downlink data is delayed by the T Delay as the first transmission time of the HARQ-ACK information carried by the terminal device to the base station, where the delay is the preset delay interval. .
  • the setting of the T Delay needs to consider the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where the T process is the terminal device. Processing time.
  • the preset delay interval T Delay is the delay interval defined in the HARQ timing. Determining, according to the downlink data, the first transmission time, that is, determining the first transmission time according to the reception time of the downlink data and the HARQ timing, where the HARQ timing refers to the transmission time sequence between the downlink data and the HARQ-ACK information, that is, the PDSCH or the downlink SPS. The transmission time sequence between the signaling and the HARQ-ACK information is released.
  • the first transmission time is delayed by k*L DL from the reception time of the downlink data, where k is a positive integer, preferably, k is a positive integer greater than or equal to 4, and L DL is a transmission time interval TTI of downlink data.
  • the transmission timing of the HARQ-ACK information is delayed by 4 times the length of the TTI compared to the reception timing of the downlink data, that is, the T Delay is 4*L DL .
  • the TTI of the downlink data may be less than 0.5 milliseconds, for example, the TTI is 1 symbol length or 2 symbol lengths.
  • the PUCCH carrying the HARQ-ACK information starts transmission at symbol n+4. For example, if the TTI of the PDSCH is 2 symbols and the downlink data starts transmission at symbol n, then the PUCCH carrying the HARQ-ACK information starts transmission at symbol n+8.
  • TDD Time Division Duplex
  • different uplink and downlink ratios correspond to different HARQ timings. After the terminal device learns the uplink-downlink ratio, the HARQ timing corresponding to the system can be known, and then the delay can be determined. Time interval T Delay .
  • the HARQ RTT (the minimum time interval between the retransmission data packet and the initial transmission data packet) is multiplied, for example, when the TTI of the downlink data is 1 or 2 symbols and the uplink data is When the duration is 1 or 2 symbols, the HARQ RTT is shortened to 1/14 or 1/7 when the TTI is 1 ms.
  • the uplink data is the uplink data indicated by the downlink data.
  • the uplink data corresponding to the downlink data is the periodic channel state information CSI indicated by the high layer signaling.
  • the periodic CSI is carried on the PUCCH or PUSCH.
  • the processing of the step 401 may be as follows: the terminal device receives the high layer signaling sent by the base station, and obtains the first sending time according to the high layer signaling.
  • the terminal device may report the periodic CSI carried in the PUCCH to the base station, where the high layer instruction includes signaling for indicating the sending time of the periodic CSI.
  • the terminal device may obtain the periodic CSI indicated in the high-layer signaling after receiving the high-level signaling.
  • the time of transmission ie the first transmission time).
  • the uplink data is the uplink data of the downlink data scheduling.
  • the uplink data corresponding to the downlink data is aperiodic CSI carried on the PUCCH, or data carried on the PUSCH, where the DCI includes uplink scheduling information, that is, UL Grant (uplink grant), and is carried on the PUSCH.
  • the data may include uplink traffic data and/or Control Information Feedback.
  • the terminal device may determine according to the method described in the first case. Specifically, the terminal device determines that the first sending time is the time when the receiving time of the downlink data is delayed by T Delay , and the T Delay is a preset delay interval.
  • the setting of the T Delay needs to consider the processing time of the terminal device, that is, T Delay ⁇ T process , where T process is the processing time of the terminal device.
  • the preset delay interval T Delay is the delay interval defined in the uplink scheduling sequence, so determining the first sending time according to the downlink data, that is, determining the first sending time according to the receiving time of the downlink data and the uplink scheduling timing,
  • the uplink scheduling sequence refers to the transmission time sequence between the UL Grant and the uplink data.
  • the first transmission time is delayed by k*L DL from the reception time of the downlink data, where k is a positive integer, preferably, k is a positive integer greater than or equal to 4, and L DL is a transmission time interval TTI of downlink data.
  • the transmission time of the uplink data is delayed by 4 times the length of the TTI compared to the reception time of the downlink data, that is, the T Delay is 4*L DL .
  • Step 402 The terminal device sends a reference signal to the base station at a second sending moment before the first sending moment, where the reference signal is used by the base station to demodulate the uplink data.
  • the second sending moment may be a moment when the terminal device sends the reference signal to the base station.
  • the reference signal is a demodulation reference signal for PUCCH demodulation, that is, a reference signal for the PUCCH; when the uplink physical channel carrying the uplink data is a PUSCH, the reference signal is used.
  • the demodulation reference signal demodulated on the PUSCH is a reference signal for the PUSCH.
  • the terminal device after receiving the downlink data sent by the base station, the terminal device demodulates the uplink data, and configures the uplink data according to the demodulation result. Therefore, the terminal device needs to complete the uplink data after the uplink data is demodulated. In addition, the terminal device needs to send a reference signal for uplink physical channel demodulation to the base station, so that the base station performs channel estimation based on the reference signal, and corrects radio channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • the configuration of the reference signal does not depend on the receiving state of the downlink data, that is, the terminal device can start to configure the reference signal as long as it determines that there is downlink data transmission, and therefore, the transmission timing of the reference signal (ie, the second transmission time) can be earlier.
  • the transmission timing of the reference signal ie, the second transmission time
  • sending the RS in advance does not affect the RTT, and improves the correct reception probability of the uplink data.
  • the reference signal is sent earlier than the uplink data, and the uplink data may be sent as early as possible without affecting the uplink data.
  • the sending time corresponding to the reference signal may be determined before the reference signal is sent.
  • the processing of step 402 may be as follows: the terminal device determines that the second sending time is the time of the first sending time and the previous L RS .
  • L RS is the length of time of the reference signal; the terminal device transmits a reference signal to the base station at the second transmission time.
  • the reference signal is temporally adjacent to the uplink data, which can ensure that the channel value on the time-frequency resource occupied by the uplink data estimated by the base station according to the reference signal is relatively accurate. For example, if the time length of the reference signal is 1 symbol and the PUCCH starts transmitting at symbol n+4, then the reference signal starts transmitting at n+3, as shown in FIG. 5(b).
  • the length of the RS is 2 symbols, and the PUCCH starts transmitting at the symbol n+8, then the RS starts transmitting at the symbol n+6.
  • the length of the RS is 1 symbol, and the PUCCH starts to transmit at the symbol n+8, then the RS starts to transmit at the symbol n+7.
  • the method before transmitting the reference signal to the base station, the method further includes: determining a first cyclic shift; and generating a reference signal located on the symbol i according to the first cyclic shift.
  • symbol i is one of the symbols occupied by the reference signal.
  • the reference signal occupies only one symbol, the reference signal is located at symbol i.
  • the reference signal occupies two or more symbols, the reference signal includes a reference signal located on symbol i.
  • the first cyclic shift is different from the second cyclic shift
  • the second cyclic shift is a cyclic shift applied to the second PUCCH or the second RS, and the second PUCCH or the second RS is also located in the symbol i.
  • the second PUCCH or the second RS is a PUCCH or RS sent by the second terminal device to the base station.
  • the code division multiplexing can be performed.
  • the terminal device may send the configured reference signal to the base station at the second sending time.
  • Step 403 The terminal device sends uplink data to the base station at the first sending time, where the uplink data is data carried by the uplink physical channel.
  • the terminal device may send the uplink data to the base station at the first sending time, where the uplink data may be data carried by the uplink physical channel, for example, carried on the PUCCH or Uplink control information of the PUSCH (including HARQ-ACK information and/or CSI, or uplink service data and/or control information feedback carried on the PUSCH.
  • the uplink data may be data carried by the uplink physical channel, for example, carried on the PUCCH or Uplink control information of the PUSCH (including HARQ-ACK information and/or CSI, or uplink service data and/or control information feedback carried on the PUSCH.
  • the length of the uplink physical channel may be less than 0.5 milliseconds, for example, 1 symbol or 2 symbols, and the length of the reference signal may be less than or equal to the length of the uplink physical channel.
  • the base station can perform uplink data demodulation according to the reference signal sent by the terminal device, which can improve the correct reception probability of the uplink data.
  • the uplink data can also be sent as early as possible to reduce the air interface delay.
  • the uplink data is data carried by the physical uplink control channel PUCCH
  • the TTI of the downlink data is 1 symbol
  • the length of the PUCCH is 1 symbol
  • the time length of the reference signal is 1 symbol, for example.
  • Step 601 The terminal device receives the downlink data sent by the base station, and determines that the first sending time is a time when the receiving time of the downlink data is delayed by 4 symbols.
  • the terminal device may send the uplink data carried by the PUCCH to the base station.
  • the time at which the uplink data is sent (that is, the first transmission time) may be the length of the TTI that is delayed by four times the downlink data.
  • the TTI of the downlink data is one symbol, that is, the first transmission time is determined to be the downlink.
  • the reception time of the data is delayed by 4 symbols.
  • the downlink data is data carried by the PDSCH or downlink semi-persistent scheduling release signaling or high layer signaling.
  • the uplink data corresponding to the downlink data may be HARQ-ACK information of the downlink data or a periodic CSI indicated by the downlink data.
  • Step 602 The terminal device sends a reference signal to the base station at a time when the receiving time of the downlink data is delayed by 3 symbols.
  • the terminal device may also determine a transmission moment of transmitting the reference signal to the base station, where the reference signal is a demodulation reference signal for PUCCH demodulation, preferably, the length of the reference signal.
  • the reference signal is a demodulation reference signal for PUCCH demodulation, preferably, the length of the reference signal.
  • the length of the PUCCH is 1 symbol
  • the length of the reference signal may be 1 symbol, and thus the base station may be delayed by 3 symbols at the receiving time of the downlink data.
  • Send a reference signal Send a reference signal.
  • Step 603 The terminal device sends the uplink data carried by the PUCCH to the base station at the time when the receiving time of the downlink data is delayed by 4 symbols.
  • the uplink data carried by the PUCCH corresponding to the downlink data may be sent to the base station at the time of delaying the reception of the downlink data by 4 symbols.
  • the HARQ RTT is reduced to 1/14 of the HARQ RTT when the TTI is 1 ms. Further, since the generation of the RS does not depend on the processing time of the downlink data, it is determined that the transmission time of the PUCCH RS is earlier than the transmission time of the PUCCH. Therefore, increasing the transmission of the RS does not affect the RTT, and improves the correct reception probability of the uplink data.
  • the uplink single carrier feature is maintained.
  • the uplink data is data carried by the physical uplink control channel PUCCH
  • the TTI of the downlink data is 2 symbols
  • the length of the PUCCH is 2 symbols
  • the time length of the reference signal is 1 symbol or 2 symbols.
  • Step 701 The terminal device receives the downlink data sent by the base station, and determines that the first sending time is a time when the receiving time of the downlink data is delayed by 8 symbols.
  • the terminal device may send the uplink data carried by the PUCCH to the base station.
  • the time at which the uplink data is sent (that is, the first transmission time) may be the length of the TTI that is delayed by 4 times the downlink data.
  • the TTI of the downlink data is 2 symbols, that is, the first transmission time is determined to be the downlink.
  • the reception time of the data is delayed by 8 symbols.
  • the downlink data is data carried by the PDSCH or downlink semi-persistent scheduling release signaling or high layer signaling.
  • the uplink data corresponding to the downlink data may be HARQ-ACK information of the downlink data or a periodic CSI indicated by the downlink data.
  • Step 702 The terminal device sends a reference signal to the base station at a time when the receiving time of the downlink data is delayed by 7 symbols or 6 symbols.
  • the terminal device may also determine a transmission moment of transmitting the reference signal to the base station, where the reference signal is a demodulation reference signal for PUCCH demodulation, preferably, the length of the reference signal.
  • the length of the PUCCH is 2 symbols
  • the length of the reference signal may be 1 symbol or 2 symbols.
  • the terminal device The reference signal may be sent to the base station at a time when the receiving time of the downlink data is delayed by 7 symbols.
  • the terminal device may delay the time of receiving the downlink data by 6 symbols.
  • the base station transmits a reference signal.
  • Step 703 The terminal device sends the uplink data carried by the PUCCH to the base station at the time when the receiving time of the downlink data is delayed by 8 symbols.
  • the uplink data carried by the PUCCH corresponding to the downlink data may be sent to the base station at the time when the receiving time of the downlink data is delayed by 8 symbols.
  • the HARQ RTT is reduced to 1/7 of the HARQ RTT when the TTI is 1 ms. Further, since the generation of the RS does not depend on the processing time of the downlink data, it is determined that the transmission timing of the PUCCH RS is earlier than the transmission timing of the PUCCH. Therefore, increasing the transmission of RS does not affect RTT, but also improves The correct reception probability of the uplink data and the uplink single carrier characteristics are maintained.
  • Step 801 The base station sends downlink data to the terminal device, and determines a first receiving time, where the first receiving time is a time when the base station receives the uplink data corresponding to the downlink data sent by the terminal device.
  • the downlink data is data that the base station sends to the terminal device, or the downlink data is data that is carried on the downlink physical channel.
  • the downlink data may be service data (for example, service data carried on the PDSCH), higher layer signaling (Higher Layer Signaling), downlink SPS release signaling, or Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the uplink data corresponding to the downlink data may be the receiving state information of the downlink data, or the uplink data indicated by the downlink data, or the uplink data scheduled by the downlink data.
  • the base station may send downlink data that is carried by the downlink physical channel to the terminal device, and after the sending, may determine the receiving time of the uplink data corresponding to the sent downlink data (which may be referred to as a first receiving time), where The first reception time may also be performed before the downlink data is transmitted to the terminal device, or both.
  • the first receiving moment may be determined in different manners according to different downlink data sent.
  • the uplink data is the reception status information of the downlink data, or the uplink data is the HARQ-ACK information corresponding to the downlink data.
  • the downlink data is the data carried by the physical downlink shared channel PDSCH or the downlink semi-persistent scheduling release signaling
  • the uplink data corresponding to the downlink data is the hybrid automatic repeat request and the correct response HARQ-ACK information.
  • the HARQ-ACK information may be carried on a PUCCH or a PUSCH.
  • the process of step 801 may be as follows: the base station sends downlink data to the terminal device, and determines that the first receiving time is the time when the transmission time of the downlink data is delayed by T Delay , and T Delay is a preset delay interval.
  • the HARQ-ACK information may be used to indicate the data received by the PDSCH (which may be referred to as PDSCH) or the receiving state of the downlink semi-persistent scheduling release signaling, and may also be referred to as HARQ-ACK feedback information.
  • the first receiving time may be determined according to the sending time of the downlink data, where the first receiving time may be the time corresponding to the delay after the delay time T Delay .
  • the delay interval T Delay may be a standard pre-defined, and the base station may store the delay interval T Delay . After the base station sends the downlink data to the terminal, the time of sending the downlink data can be known. The base station may use the time when the transmission time of the downlink data is delayed by the T Delay as the first receiving time of the HARQ-ACK information of the PUCCH or the PUSCH transmitted by the base station, where T Delay is a preset delay interval. .
  • the setting of the T Delay needs to consider the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where the T process is the terminal device. Processing time.
  • the preset delay interval T Delay is the delay interval defined in the HARQ timing. Determining, according to the downlink data, the first receiving moment, that is, determining the first receiving moment according to the sending moment of the downlink data and the HARQ timing, where the HARQ timing refers to the transmission time sequence between the downlink data and the HARQ-ACK information, that is, the PDSCH or the downlink SPS. The transmission time sequence between the signaling and the HARQ-ACK information is released.
  • the first receiving time is delayed by k*L DL from the sending time of the downlink data, where k is a positive integer, preferably, k is a positive integer greater than or equal to 4, and L DL is a transmission time interval TTI of downlink data.
  • the reception time of the HARQ-ACK information is delayed by 4 times the length of the TTI compared to the transmission timing of the downlink data, that is, the T Delay is 4*L DL .
  • the TTI of the downlink data may be less than 0.5 milliseconds, for example, the TTI is 1 symbol length or 2 symbol lengths.
  • the base station starts receiving at symbol n+4. For example, if the TTI of the PDSCH is 2 symbols and the downlink data starts transmitting at symbol n, the base station starts receiving at symbol n+8.
  • TDD Time Division Duplex
  • different uplink and downlink ratios correspond to different HARQ timings. After the base station knows the uplink and downlink ratio, the base station can know the HARQ timing corresponding to the system, and further, the delay can be determined. Interval T Delay .
  • the HARQ RTT (the minimum time interval between the retransmission data packet and the initial transmission data packet) is multiplied by the HARQ timing according to the HARQ timing, for example, when the TTI of the downlink data is 1 or 2 symbols and the uplink data When the duration is 1 or 2 symbols, the HARQ RTT is shortened to 1/14 or 1/7 when the TTI is 1 ms.
  • the uplink data is the uplink data indicated by the downlink data.
  • the uplink data corresponding to the downlink data is the periodic channel state information CSI indicated by the high layer signaling.
  • the periodic CSI is carried on the PUCCH or PUSCH.
  • the processing of step 801 may be as follows: the base station determines the first receiving moment, and sends high layer signaling to the terminal device, where the high layer signaling includes information indicating the first receiving moment.
  • the base station may send a high-level command to the terminal device, where the high-level command includes time information, and the base station may use the time included in the high-level signaling as the first receiving time.
  • the base station may send the high layer signaling to the terminal device.
  • the time information included in the high layer signaling may also be obtained, and the terminal device may use the time included in the high layer signaling as the first sending time. That is, the base station can use the time included in the high layer signaling as the first receiving time, and the terminal device can use the time included in the high layer signaling as the first sending time.
  • the uplink data is the uplink data of the downlink data scheduling.
  • the uplink data corresponding to the downlink data is aperiodic CSI carried on the PUCCH, or data carried on the PUSCH, where the DCI includes uplink scheduling information, that is, UL Grant (uplink grant), and is carried on the PUSCH.
  • the data may include uplink traffic data and/or Control Information Feedback.
  • the base station determines the first receiving time according to the downlink data, it may be determined according to the method described in the first case.
  • the setting of the T Delay needs to consider the processing time of the terminal device, that is, T Delay ⁇ T process , where T process is the processing time of the terminal device.
  • the base station determines that the first receiving time is the time when the sending time of the downlink data is delayed by T Delay , and the T Delay is a preset delay interval.
  • the preset delay interval T Delay is the delay interval defined in the uplink scheduling sequence. Therefore, determining the first receiving time according to the downlink data, that is, determining the first receiving time according to the sending time of the downlink data and the uplink scheduling timing, where the uplink scheduling is performed. Timing refers to the transmission time sequence between the UL Grant and the upstream data.
  • the first receiving time is delayed by k*L DL from the sending time of the downlink data, where k is a positive integer, preferably, k is a positive integer greater than or equal to 4, and L DL is a transmission time interval TTI of downlink data.
  • the reception time of the uplink data is delayed by 4 times the length of the TTI compared to the transmission timing of the downlink data, that is, the T Delay is 4*L DL .
  • Step 802 The base station receives a reference signal sent by the terminal device at a second receiving moment before the first receiving moment, where the reference signal is used by the base station to demodulate the uplink data.
  • the second receiving moment may be a moment when the base station receives the reference signal sent by the terminal device.
  • the reference signal is a demodulation reference signal for PUCCH demodulation, that is, a reference signal for the PUCCH; when the uplink physical channel carrying the uplink data is a PUSCH, the reference signal is used.
  • the demodulation reference signal demodulated on the PUSCH is a reference signal for the PUSCH.
  • the terminal device may send a reference signal to the base station at a second sending moment before the first sending moment, and correspondingly, the base station may receive the terminal at the second receiving moment before the first receiving moment.
  • the reference signal sent by the device.
  • the base station may perform channel estimation based on the reference signal, and correct wireless channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • the configuration of the reference signal does not depend on the receiving state of the downlink data, that is, the terminal device can start to configure the reference signal as long as it determines that there is downlink data transmission, and does not need to wait for the downlink data to be demodulated, therefore, the transmission timing of the reference signal
  • the second transmission time may be earlier than the first transmission time.
  • the time at which the base station receives the reference signal ie, the second reception time
  • the reference signal is received earlier than the uplink data, and the uplink data may be received as early as possible without affecting the uplink data.
  • the receiving moment corresponding to the reference signal may be determined first.
  • the processing of step 802 may be as follows: the base station determines that the second receiving moment is the time of the first receiving moment to the previous L RS , L The RS is the length of time of the reference signal; the base station receives the reference signal sent by the terminal device at the second receiving moment.
  • the second receiving moment that is, the receiving moment corresponding to the reference signal
  • the reference signal is temporally adjacent to the uplink data, which can ensure that the channel value on the time-frequency resource occupied by the uplink data estimated by the base station according to the reference signal is relatively accurate. For example, if the reference signal has a time length of 1 symbol and the PUCCH starts receiving at symbol n+4, then the reference signal begins to receive at n+3, as shown in Figure 9(b).
  • the length of the RS is 2 symbols, and the PUCCH starts to receive at the symbol n+8, then the RS starts to receive at the symbol n+6.
  • the length of the RS is 1 symbol, and the PUCCH starts to receive at the symbol n+8, then the RS starts to receive at the symbol n+7.
  • the base station before or after receiving the reference signal, further includes: determining a first cyclic shift; and generating a reference signal located on the symbol i according to the first cyclic shift.
  • symbol i is one of the symbols occupied by the reference signal.
  • the reference signal occupies only one symbol, the reference signal is located at symbol i.
  • the reference signal occupies two or more symbols, the reference signal includes a reference signal located on symbol i.
  • the first cyclic shift is different from the second cyclic shift
  • the second cyclic shift is a cyclic shift applied to the second PUCCH or the second RS, and the second PUCCH or the second RS is also located in the symbol i.
  • the second PUCCH or the second RS is a PUCCH or RS sent by the second terminal device to the base station.
  • the reference signal received by the base station is a reference signal passing through the wireless channel, so the base station needs to generate a reference signal (ie, a reference signal transmitted by the terminal device that has not passed through the wireless channel), and calculate the generated reference signal and the received reference signal.
  • the wireless channel value is obtained, that is, channel estimation is performed.
  • the uplink data is then demodulated based on the wireless channel value.
  • the base station may receive the reference signal sent by the terminal device at the second receiving moment.
  • Step 803 The base station receives the uplink data sent by the terminal device at the first receiving time, where the uplink data is data carried by the uplink physical channel.
  • the base station may receive the uplink data sent by the terminal device at the first receiving time, where the uplink data may be data carried by the uplink physical channel, for example, bearer.
  • Uplink control information (including HARQ-ACK information and/or CSI, or uplink service data and/or control information feedback carried on the PUSCH) on the PUCCH or the PUSCH.
  • the length of the uplink physical channel may be less than 0.5 milliseconds, for example, 1 symbol or 2 symbols, and the length of the reference signal may be less than or equal to the length of the uplink physical channel.
  • the base station can perform uplink data demodulation according to the reference signal sent by the terminal device, which can improve the correct reception probability of the uplink data.
  • the uplink data can also be sent as early as possible to reduce the air interface delay.
  • the uplink data is data carried by the physical uplink control channel PUCCH
  • the TTI of the downlink data is 1 symbol
  • the length of the PUCCH is 1 symbol
  • the time length of the reference signal is 1 symbol, for example, for receiving
  • the steps of the reference signal and the uplink data are described in detail as shown in FIG.
  • Step 1001 The base station sends downlink data to the terminal device, and determines that the first receiving time is a time when the sending time of the downlink data is delayed by 4 symbols.
  • the receiving time of the data carried by the terminal device and transmitted by the PUCCH may be determined according to the sending time.
  • the time at which the uplink data is received (that is, the first receiving time) may be the length of the TTI that is delayed by 4 times the downlink data.
  • the TTI of the downlink data is 1 symbol, that is, the first receiving time is determined to be the downlink.
  • the time at which the data is transmitted is delayed by 4 symbols.
  • the downlink data is data carried by the PDSCH or downlink semi-persistent scheduling release signaling or high layer signaling.
  • the uplink data corresponding to the downlink data may be HARQ-ACK information of the downlink data or a periodic CSI indicated by the downlink data.
  • Step 1002 The base station receives the reference signal sent by the terminal device at the time when the transmission time of the downlink data is delayed by 3 symbols.
  • the receiving moment of the reference signal sent by the terminal device may be further determined, where the reference signal is a demodulation reference signal used for PUCCH demodulation, and preferably, the length of the reference signal is less than Or the length of the PUCCH, when the length of the PUCCH is 1 symbol, the length of the reference signal may be 1 symbol, thereby receiving the terminal device at the time of delaying the transmission of the downlink data by 3 symbols.
  • Step 1003 The base station receives the uplink data carried by the terminal device and is sent by the PUCCH at the time when the transmission time of the downlink data is delayed by 4 symbols.
  • the base station may receive the uplink data carried by the terminal device and corresponding to the downlink data and transmitted on the PUCCH at the time of delaying the transmission of the downlink data by 4 symbols.
  • the HARQ RTT is reduced to 1/14 of the HARQ RTT when the TTI is 1 ms. Further, since the generation of the RS does not depend on the processing time of the downlink data, it is determined that the reception time of the PUCCH RS is earlier than the reception time of the PUCCH. Therefore, increasing the reception of the RS does not affect the RTT, and improves the correct reception probability of the uplink data.
  • the uplink single carrier feature is maintained.
  • the uplink data is data carried by the physical uplink control channel PUCCH
  • the TTI of the downlink data is 2 symbols
  • the length of the PUCCH is 2 symbols
  • the time length of the reference signal is 1 symbol or 2 symbols.
  • Step 1101 The base station sends downlink data to the terminal device, and determines that the first receiving time is a time when the sending time of the downlink data is delayed by 8 symbols.
  • the receiving time of the data carried by the terminal device and transmitted by the PUCCH may be determined according to the sending time.
  • the time at which the uplink data is received (that is, the first receiving time) may be the length of the TTI that is delayed by four times the downlink data.
  • the TTI of the downlink data is 2 symbols, that is, the first receiving time is determined to be the downlink.
  • the time at which the data is transmitted is delayed by 8 symbols.
  • the downlink data is data carried by the PDSCH or downlink semi-persistent scheduling release signaling or high layer signaling.
  • the uplink data corresponding to the downlink data may be HARQ-ACK information of the downlink data or a periodic CSI indicated by the downlink data.
  • Step 1102 The base station delays the transmission of the downlink data by 7 symbols or 6 symbols. Receiving a reference signal sent by the terminal device.
  • the receiving moment of the reference signal sent by the terminal device may be further determined, where the reference signal is a demodulation reference signal used for PUCCH demodulation, and preferably, the length of the reference signal is less than Or the length of the PUCCH, when the length of the PUCCH is 2 symbols, the length of the reference signal may be 1 symbol or 2 symbols.
  • the base station may When the transmission time of the downlink data is delayed by 7 symbols, the reference signal transmitted by the terminal device is received. When the time length of the reference signal is 2 symbols, the terminal device may receive the delay of 6 symbols at the transmission time of the downlink data.
  • the reference signal sent by the terminal device may be further determined, where the reference signal is a demodulation reference signal used for PUCCH demodulation, and preferably, the length of the reference signal is less than Or the length of the PUCCH, when the length of the PUCCH is 2 symbols, the length of the reference signal may be 1 symbol or 2 symbols.
  • the base station may When the transmission time of the downlink data is delayed by 7 symbols
  • Step 1103 The base station receives the uplink data carried by the terminal device and is sent by the PUCCH at the time when the transmission time of the downlink data is delayed by 8 symbols.
  • the base station may receive the uplink data carried by the terminal device and transmit the PUCCH corresponding to the downlink data, at the time of delaying the transmission of the downlink data by 8 symbols.
  • the HARQ RTT is reduced to 1/7 of the HARQ RTT when the TTI is 1 ms. Further, since the generation of the RS does not depend on the processing time of the downlink data, it is determined that the reception timing of the PUCCH RS is earlier than the reception timing of the PUCCH. Therefore, increasing the reception of the RS does not affect the RTT, but also improves the correct reception probability of the uplink data and maintains the uplink single carrier characteristics.
  • Step 1201 The base station sends downlink data to the terminal device to determine a first receiving time, where the first receiving time is a time when the base station receives the uplink data corresponding to the downlink data sent by the terminal device.
  • the downlink data is data that the base station sends to the terminal device, or the downlink data is data that is carried on the downlink physical channel.
  • the downlink data may be service data (for example, service data carried on the PDSCH), higher layer signaling (Higher Layer Signaling), downlink SPS release signaling, or Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the uplink data corresponding to the downlink data may be the receiving state information of the downlink data, or the uplink data indicated by the downlink data, or the uplink data scheduled by the downlink data.
  • the base station may send downlink data carried by the downlink physical channel to the terminal device, and may determine a receiving moment of the uplink data corresponding to the sent downlink data (may be referred to as a first receiving time).
  • Step 1202 The terminal device receives the downlink data sent by the base station, and determines a first sending time, where the first receiving time is a time when the terminal device sends the uplink data corresponding to the downlink data to the base station.
  • the terminal device may receive the downlink data sent by the base station, and determine the sending time of the uplink data corresponding to the received downlink data (may be referred to as the first A sending moment).
  • Step 1203 The terminal device sends a reference signal to the base station at a second sending moment before the first sending moment, where the reference signal is used by the base station to demodulate the uplink data.
  • the second sending moment may be a moment when the terminal device sends the reference signal to the base station.
  • the reference signal is a demodulation reference signal for PUCCH demodulation, that is, a reference signal for the PUCCH; when the uplink physical channel carrying the uplink data is a PUSCH, the reference signal is used.
  • the demodulation reference signal demodulated on the PUSCH is a reference signal for the PUSCH.
  • the terminal device after receiving the downlink data sent by the base station, the terminal device demodulates the uplink data, and configures the uplink data according to the demodulation result. Therefore, the terminal device needs to complete the uplink data after the uplink data is demodulated. In addition, the terminal device needs to send a reference signal for uplink physical channel demodulation to the base station, so that the base station performs channel estimation based on the reference signal, and corrects radio channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • Step 1204 The base station receives a reference signal sent by the terminal device at a second receiving moment before the first receiving moment, where the reference signal is used by the base station to demodulate the uplink data.
  • the second receiving moment may be a moment when the base station receives the reference signal sent by the terminal device.
  • the terminal device may send a reference signal to the base station at a second sending moment before the first sending moment, and correspondingly, the base station may receive the reference signal sent by the terminal device at the second receiving moment before the first receiving moment. After receiving the reference signal at the second receiving moment, the base station may perform channel estimation based on the reference signal, and correct wireless channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • Step 1205 The terminal device sends uplink data to the base station at the first sending time, where the uplink data is data carried by the uplink physical channel.
  • the terminal device may send the uplink data to the base station at the first sending time, where the uplink data may be data carried by the uplink physical channel, for example, carried on the PUCCH or Uplink control information of PUSCH (including HARQ-ACK) Information and/or CSI, or uplink service data and/or control information feedback carried on the PUSCH.
  • the uplink data may be data carried by the uplink physical channel, for example, carried on the PUCCH or Uplink control information of PUSCH (including HARQ-ACK) Information and/or CSI, or uplink service data and/or control information feedback carried on the PUSCH.
  • PUSCH including HARQ-ACK
  • Step 1206 The base station receives the uplink data sent by the terminal device at the first receiving time, where the uplink data is data carried by the uplink physical channel.
  • the base station may receive the uplink data sent by the terminal device at the first receiving time, where the uplink data may be data carried by the uplink physical channel, for example, bearer.
  • Uplink control information (including HARQ-ACK information and/or CSI, or uplink service data and/or control information feedback carried on the PUSCH) on the PUCCH or the PUSCH.
  • the downlink data is sent to the terminal device, and the first receiving moment is determined according to the downlink data, and the reference signal sent by the terminal device is received at the second receiving moment before the first receiving moment, and received at the first receiving moment.
  • the uplink data sent by the terminal device, and the uplink data is data carried by the uplink physical channel.
  • the base station can perform uplink data demodulation according to the reference signal sent by the terminal device, which can improve the correct reception probability of the uplink data.
  • the uplink data can also be sent as early as possible to reduce the air interface delay.
  • the embodiment of the present invention further provides a terminal device.
  • the terminal device provided in this embodiment can implement the process of the embodiment shown in FIG. 4, FIG. 6, and FIG.
  • the terminal device includes a receiver 210, a processor 220, and a transmitter 230, wherein
  • the receiver 210 is configured to receive downlink data sent by a base station
  • the processor 220 is configured to determine, according to the downlink data received by the receiver 210, a first sending moment, where the first sending moment is that the terminal device sends the downlink data to the base station The time of the corresponding uplink data;
  • the transmitter 230 is configured to send a reference signal to the base station at a second sending moment before the first sending moment determined by the processor 220, where the reference signal is used by the base station solution Adjusting the uplink data; sending the uplink data to the base station at the first sending moment determined by the processor 220, where the uplink data is data carried by an uplink physical channel.
  • the receiver 210 may receive the downlink data sent by the base station, and the processor 220 may determine the uplink data corresponding to the downlink data received by the receiver 210.
  • the time of transmission (which may be referred to as the first transmission time).
  • the processor 220 After receiving the downlink data sent by the base station, the processor 220 demodulates the uplink data, and configures the uplink data according to the demodulation result. Therefore, the processor 220 needs to start after the uplink data is demodulated. Configure upstream data.
  • the transmitter 230 needs to transmit a reference signal for uplink physical channel demodulation to the base station, so that the base station performs channel estimation based on the reference signal, and corrects the radio channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • the transmitter 230 may send the uplink data to the base station at the first sending time.
  • the specific implementation process may be implemented according to the method described in steps 401-403.
  • the time length of the uplink physical channel is less than 0.5 milliseconds, and the length of the reference signal is less than or equal to the length of time of the uplink physical channel.
  • the processor 220 is specifically configured to:
  • the second sending time is a time when the first sending time determined by the processor 220 is forward L RS , and the L RS is a time length of the reference signal;
  • the transmitter 230 is specifically configured to:
  • the downlink data is data that is carried by the physical downlink shared channel PDSCH or the downlink semi-persistent scheduling release signaling, where the uplink data is a hybrid automatic repeat request corresponding to the downlink data, and the HARQ-ACK information is correctly acknowledged;
  • the processor 220 is specifically configured to:
  • the first sending time is a time when the receiving time of the downlink data received by the receiver 210 is delayed by T Delay , and the T Delay is a preset delay interval.
  • the processor 220 determines whether the received downlink data is correct. Further, the transmitter 230 can feed back the HARQ-ACK information to the base station.
  • the delay interval T Delay can be pre-defined by the standard, and the delay interval T Delay can be stored.
  • the processor 220 can obtain the receiving time of the downlink data, and can delay the receiving time of the downlink data to the time of the T Delay as the transmitter 230 transmits the HARQ-ACK carried on the PUCCH or the PUSCH to the base station.
  • the setting of the T Delay needs to consider the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where the T process is the terminal device.
  • T Delay the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where the T process is the terminal device.
  • Processing time wherein the specific implementation process can be implemented according to the method described in the first case in step 401.
  • the T Delay is 4*L DL
  • the L DL is a transmission time interval TTI of the downlink data
  • the downlink data has a TTI less than 0.5 milliseconds.
  • the downlink data is a high-level command, where the high-level command includes signaling for indicating the first sending moment, and the uplink data includes channel state information CSI, where the specific implementation process may be performed according to step 401.
  • the specific implementation process may be performed according to step 401. The method described in Cases 2 and 3 is implemented.
  • the uplink data is data carried by a physical uplink control channel (PUCCH)
  • the reference signal is a demodulation reference signal used for the PUCCH demodulation
  • the TTI of the downlink data is 1 symbol
  • the PUCCH The length of time is 1 symbol, and the length of the reference signal is 1 symbol;
  • the processor 220 is specifically configured to:
  • the first sending time is a time when the receiving time of the downlink data received by the receiver 210 is delayed by 4 symbols;
  • the transmitter 230 is specifically configured to:
  • the uplink data carried in the PUCCH is transmitted to the base station at the time of delaying 4 symbols.
  • the receiver 210 may send the uplink data carried by the PUCCH to the base station, where the time at which the uplink data is sent (that is, the first transmission time) may be delayed by 4 times than the receiving time.
  • the time length of the TTI of the data At this time, the TTI of the downlink data is one symbol, and the processor 220 determines that the first transmission time is the time when the reception time of the downlink data is delayed by 4 symbols.
  • the downlink data is data carried by the PDSCH or downlink semi-persistent scheduling release signaling.
  • the processor 220 may further determine a sending moment of transmitting the reference signal to the base station.
  • the length of the reference signal is less than or equal to the length of the PUCCH, and the length of the PUCCH is 1
  • the time length of the reference signal may be one symbol, whereby the transmitter 210 may transmit the reference signal to the base station at the time when the reception time of the downlink data is delayed by three symbols. After the transmitter 210 sends the reference signal to the base station, it can also be in the downlink data. The receiving time is delayed by 4 symbols and the uplink data carried by the PUCCH corresponding to the downlink data is transmitted to the base station.
  • the uplink data is data carried by the PUCCH
  • the reference signal is a demodulation reference signal used for the PUCCH demodulation
  • the TTI of the downlink data is 2 symbols
  • the length of the PUCCH is 2 symbols
  • the reference signal has a length of time of 1 symbol or 2 symbols;
  • the processor 220 is specifically configured to:
  • the first sending time is a time when the receiving time of the downlink data received by the receiver 210 is delayed by 8 symbols;
  • the transmitter 230 is specifically configured to:
  • the receiver 210 And transmitting, by the receiver 210, the reference signal to the base station at a time when the receiving time of the downlink data received by the receiver 210 is delayed by 7 symbols or 6 symbols; and the downlink received by the receiver 210 The data reception time is delayed by 8 symbols, and the uplink data carried in the PUCCH is transmitted to the base station.
  • the receiver 210 may send the uplink data carried by the PUCCH to the base station, where the time at which the uplink data is sent (that is, the first transmission time) may be delayed by 4 times than the receiving time.
  • the time length of the TTI of the data is 2 symbols, and the processor 220 determines that the first transmission time is the time when the reception time of the downlink data is delayed by 8 symbols.
  • the downlink data is data carried by the PDSCH or downlink semi-persistent scheduling release signaling.
  • the processor 220 may further determine a sending moment of transmitting the reference signal to the base station.
  • the length of the reference signal is less than or equal to the length of the PUCCH, and the length of the PUCCH is 2
  • the time length of the reference signal may be 1 symbol or 2 symbols.
  • the transmitter 230 may delay the 7 symbols at the receiving time of the downlink data.
  • the reference signal is sent to the base station.
  • the transmitter 230 may send the reference signal to the base station at the time of delaying the reception of the downlink data by 6 symbols.
  • the transmitter 230 may further transmit the uplink data carried by the PUCCH corresponding to the downlink data to the base station at the time when the reception time of the downlink data is delayed by 8 symbols.
  • the embodiment of the present invention further provides a base station.
  • the base station provided in this embodiment may implement the process of the embodiment shown in FIG. 8, FIG. 10 and FIG. a receiver 310, a processor 320, and a transmitter 330, wherein
  • the transmitter 330 is configured to send downlink data to the terminal device.
  • the processor 320 is configured to determine a first receiving moment, where the first receiving moment is a moment when the base station receives uplink data that is sent by the terminal device and that is corresponding to the downlink data.
  • the receiver 310 is configured to receive a reference signal sent by the terminal device at a second receiving moment before the first receiving moment that is determined by the processor 320, where the reference signal is used by the reference signal
  • the base station demodulates the uplink data, and receives the uplink data sent by the terminal device at the first receiving moment determined by the processor 320, where the uplink data is data carried by the uplink physical channel.
  • the transmitter 330 may send downlink data that is carried by the downlink physical channel to the terminal device.
  • the processor 320 may determine the receiving time of the uplink data corresponding to the downlink data sent by the transmitter 330. A receiving moment), wherein determining the first receiving moment may also be performed before transmitting downlink data to the terminal device, or both.
  • the transmitter 230 may send a reference signal to the base station at a second sending moment before the first sending moment. Accordingly, the receiver 310 may receive the reference signal sent by the terminal device at the second receiving moment before the first receiving moment.
  • the processor 320 may perform channel estimation based on the reference signal and correct the wireless channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • the receiver 310 can receive the uplink data sent by the terminal device at the first receiving time.
  • the specific implementation process can be implemented according to the method described in steps 801-803.
  • the time length of the uplink physical channel is less than 0.5 milliseconds, and the length of the reference signal is less than or equal to the length of time of the uplink physical channel.
  • the processor 320 is specifically configured to:
  • the second receiving moment is a time when the first receiving time determined by the processor 320 is forward L RS , and the L RS is a time length of the reference signal;
  • the receiver 310 is specifically configured to:
  • the downlink data is data that is carried by the physical downlink shared channel PDSCH or the downlink semi-persistent scheduling release signaling, where the uplink data is a hybrid automatic repeat request corresponding to the downlink data, and the HARQ-ACK information is correctly acknowledged;
  • the processor 320 is specifically configured to:
  • the first receiving time is a time when the transmission time of the downlink data sent by the transmitter 330 is delayed by T Delay , and the T Delay is a preset delay interval.
  • the processor 320 may determine the first receiving time according to the sending time of the downlink data, where the first receiving time may be the time corresponding to the delay after the delay time T Delay .
  • the delay interval T Delay may be a standard pre-defined, and the base station may store the delay interval T Delay .
  • the processor 320 can learn the transmission time of the downlink data, and the time when the transmission time of the downlink data is delayed by the T Delay can be used as the HARQ of the PUCCH or the PUSCH transmitted by the base station receiving terminal device.
  • the setting of the T Delay needs to consider the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where the T process is the terminal device.
  • T Delay the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where the T process is the terminal device.
  • Processing time wherein the specific implementation process can be implemented according to the method described in case one in step 801.
  • the T Delay is 4*L DL
  • the L DL is a transmission time interval TTI of the downlink data
  • the downlink data has a TTI less than 0.5 milliseconds.
  • the downlink data is a high-level command, where the high-level command includes signaling for indicating the first receiving moment, and the uplink data includes channel state information CSI, where the specific implementation process may be performed according to step 801.
  • the specific implementation process may be performed according to step 801. The method described in Cases 2 and 3 is implemented.
  • the uplink data is data carried by the PUCCH
  • the reference signal is a demodulation reference signal used for the PUCCH demodulation
  • the TTI of the downlink data is 1 symbol
  • the length of the PUCCH is 1 symbol
  • the reference signal has a length of time of 1 symbol
  • the processor 320 is specifically configured to:
  • the first receiving time is a time when the sending time of the downlink data sent by the transmitter 330 is delayed by 4 symbols;
  • the receiver 310 is specifically configured to:
  • the processor 320 may determine, according to the sending time, a receiving moment of the data that is sent by the terminal device and is carried by the PUCCH, where the uplink data is received (ie, the first receiving time)
  • the time length of the TTI of the downlink data may be four times longer than the transmission time.
  • the TTI of the downlink data is one symbol, that is, the time when the first reception time is the delay of the transmission time of the downlink data by four symbols.
  • the processor 320 may further determine the receiving moment of the reference signal sent by the terminal device.
  • the length of the reference signal is less than or equal to the length of the PUCCH, and the length of the PUCCH is 1
  • the time length of the reference signal may be one symbol, whereby the receiver 310 may receive the reference signal transmitted by the terminal device at the time of delaying the transmission of the downlink data by three symbols.
  • the transmitter 330 can receive the uplink data carried by the terminal device and transmit the PUCCH corresponding to the downlink data, at the time of delaying the transmission of the downlink data by 4 symbols.
  • the uplink data is data carried by the PUCCH
  • the reference signal is a demodulation reference signal used for the PUCCH demodulation
  • the TTI of the downlink data is 1 symbol
  • the length of the PUCCH is 2 symbols
  • the reference signal has a length of time of 1 symbol or 2 symbols;
  • the processor 320 is specifically configured to:
  • the first receiving time is a time when the sending time of the downlink data sent by the transmitter 330 is delayed by 8 symbols;
  • the receiver 310 is specifically configured to:
  • the processor 320 may determine, according to the sending time, a receiving moment of the data that is sent by the terminal device and is carried by the PUCCH, where the uplink data is received (ie, the first receiving time)
  • the time length of the TTI is 4 times longer than the transmission time.
  • the TTI of the downlink data is 2 symbols, that is, the time when the first reception time is 8 bits of the transmission time of the downlink data is determined.
  • the transmitter 330 sends the downlink number to the terminal device.
  • the processor 320 may further determine the receiving moment of the reference signal sent by the terminal device, preferably, the length of the reference signal is less than or equal to the length of the PUCCH, and the length of the reference signal when the length of the PUCCH is 2 symbols. It can be 1 symbol or 2 symbols.
  • the receiver 310 can receive the reference signal sent by the terminal device at the time when the transmission time of the downlink data is delayed by 7 symbols.
  • the receiver 310 may receive the reference signal transmitted by the terminal device at the time of delaying the transmission of the downlink data by 6 symbols.
  • the transmitter 330 can receive the uplink data carried by the terminal device and corresponding to the downlink data and transmitted on the PUCCH at the time when the transmission time of the downlink data is delayed by 8 symbols.
  • the downlink data sent by the base station is received, and the first sending time is determined according to the downlink data, and the reference signal is sent to the base station at the second sending time before the first sending time, and is sent to the base station at the first sending time.
  • the uplink data is data carried by the uplink physical channel.
  • the base station can perform uplink data demodulation according to the reference signal sent by the terminal device, which can improve the correct reception probability of the uplink data.
  • the uplink data can also be sent as early as possible to reduce the air interface delay.
  • the embodiment of the present invention further provides a terminal device.
  • the terminal device provided in this embodiment can implement the processes described in FIG. 4, FIG. 6, and FIG. Equipment includes:
  • the receiving module 1310 is configured to receive downlink data sent by the base station
  • a determining module 1320 configured to determine, according to the downlink data, a first sending time, where the first sending time is a time when the terminal device sends uplink data corresponding to the downlink data to the base station;
  • the sending module 1330 is configured to send, to the base station, a reference signal at a second sending moment before the first sending moment that is determined by the determining module, where the reference signal is used by the base station to demodulate the
  • the uplink data is sent to the base station at the first sending time determined by the determining module, where the uplink data is data carried by an uplink physical channel.
  • the receiving module 1310 can receive the downlink data sent by the base station, and the determining module 1320 can determine the sending time of the uplink data corresponding to the downlink data. A sending moment). After receiving the downlink data sent by the base station, the receiving module 1310 demodulates the uplink data, and configures the uplink data according to the demodulation result. Therefore, the terminal device needs to complete the uplink data after the uplink data is demodulated.
  • the transmission mode Block 1330 needs to transmit a reference signal for uplink physical channel demodulation to the base station, so that the base station performs channel estimation based on the reference signal and corrects radio channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • the sending module 1330 may further send the uplink data to the base station at the first sending time, where the specific implementation process may be implemented according to the method described in steps 401-403.
  • the time length of the uplink physical channel is less than 0.5 milliseconds, and the length of the reference signal is less than or equal to the length of time of the uplink physical channel.
  • the determining module 1320 is further configured to:
  • the second sending time is the time that the first sending time determined by the determining module 1320 is forward L RS , and the L RS is a time length of the reference signal;
  • the sending module 1330 is specifically configured to:
  • the sending module 1330 can send the configured reference signal to the base station at the second sending moment.
  • the downlink data is data that is carried by the physical downlink shared channel PDSCH or the downlink semi-persistent scheduling release signaling, where the uplink data is a hybrid automatic repeat request corresponding to the downlink data, and the HARQ-ACK information is correctly acknowledged;
  • the determining module 1320 is specifically configured to:
  • the T Delay is a preset delay interval.
  • the terminal device determines whether the received downlink data is correct. Further, the sending module 1330 may feed back the HARQ-ACK information to the base station.
  • the delay interval T Delay can be pre-defined by the standard, and the delay interval T Delay can be stored.
  • the determining module 1320 can obtain the receiving time of the downlink data, and the time when the receiving time of the downlink data is delayed by the T Delay can be used by the sending module 1330 to send the HARQ-ACK information carried in the PUCCH or the PUSCH to the base station.
  • the first transmission time, wherein T Delay is a preset delay interval.
  • the setting of the T Delay needs to consider the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where the T process is the terminal device.
  • T Delay the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where the T process is the terminal device.
  • Processing time wherein the specific implementation process can be implemented according to the method described in the first case in step 401.
  • the T Delay is 4*L DL
  • the L DL is a transmission time interval TTI of the downlink data
  • the downlink data has a TTI less than 0.5 milliseconds.
  • the downlink data is a high-level command, where the high-level command includes signaling for indicating the first sending moment, and the uplink data includes channel state information CSI, where the specific implementation process may be performed according to step 401.
  • the specific implementation process may be performed according to step 401. The method described in Cases 2 and 3 is implemented.
  • the uplink data is data carried by a physical uplink control channel (PUCCH)
  • the reference signal is a demodulation reference signal used for the PUCCH demodulation
  • the TTI of the downlink data is 1 symbol
  • the PUCCH The length of time is 1 symbol, and the length of the reference signal is 1 symbol;
  • the determining module 1320 is specifically configured to:
  • the first sending time is a time when the receiving time of the downlink data is delayed by 4 symbols
  • the sending module 1330 is specifically configured to:
  • the sending module 1330 may send the uplink data carried by the PUCCH to the base station, where the time at which the uplink data is sent (ie, the first sending time) may be delayed by 4 times than the receiving time.
  • the time length of the TTI of the downlink data is doubled.
  • the TTI of the downlink data is one symbol, and the determining module 1320 determines that the first transmission time is the time when the reception time of the downlink data is delayed by four symbols.
  • the downlink data is data carried by the PDSCH or downlink semi-persistent scheduling release signaling.
  • the determining module 1320 may further determine a sending moment of transmitting the reference signal to the base station, where the length of the reference signal is less than or equal to the length of the PUCCH, and the length of the PUCCH is 1 symbol.
  • the time length of the reference signal may be one symbol. Therefore, the transmission module 1330 may transmit the reference signal to the base station at the time when the reception time of the downlink data is delayed by three symbols. After transmitting the reference signal to the base station, the sending module 1330 may further send a corresponding to the base station at the time when the receiving time of the downlink data is delayed by 4 symbols.
  • the uplink data carried in the PUCCH of the downlink data may be determined.
  • the uplink data is data carried by the PUCCH
  • the reference signal is a demodulation reference signal used for the PUCCH demodulation
  • the TTI of the downlink data is 2 symbols
  • the length of the PUCCH is 2 symbols
  • the reference signal has a length of time of 1 symbol or 2 symbols;
  • the determining module 1320 is specifically configured to:
  • the first sending time is a time when the receiving time of the downlink data is delayed by 8 symbols
  • the sending module 1330 is specifically configured to:
  • the sending module 1330 may send the uplink data carried by the PUCCH to the base station, where the time at which the uplink data is sent (ie, the first sending time) may be delayed by 4 times than the receiving time.
  • the time length of the TTI of the downlink data is doubled.
  • the TTI of the downlink data is 2 symbols, and the determining module 1320 determines that the first transmission time is the time when the reception time of the downlink data is delayed by 8 symbols.
  • the downlink data is data carried by the PDSCH or downlink semi-persistent scheduling release signaling.
  • the determining module 1320 may further determine a sending moment of transmitting the reference signal to the base station, where the length of the reference signal is less than or equal to the length of the PUCCH, and the length of the PUCCH is 2 symbols.
  • the time length of the reference signal may be 1 symbol or 2 symbols.
  • the transmission module 1330 may be sent to the time when the reception time of the downlink data is delayed by 7 symbols.
  • the base station sends the reference signal.
  • the transmitting module 1330 can send the reference signal to the base station at the time when the receiving time of the downlink data is delayed by 6 symbols.
  • the sending module 1330 may further send the uplink data carried by the PUCCH corresponding to the downlink data to the base station at the time when the receiving time of the downlink data is delayed by 8 symbols.
  • the embodiment of the present invention further provides a base station.
  • the base station provided in this embodiment may implement the processes shown in FIG. 8, FIG. 10 and FIG. 11 of the present invention, where the base station includes:
  • the sending module 1410 is configured to send downlink data to the terminal device.
  • the determining module 1420 is configured to determine a first receiving moment, where the first receiving moment is a moment when the base station receives the uplink data that is sent by the terminal device and that is corresponding to the downlink data.
  • the receiving module 1430 is configured to receive a reference signal sent by the terminal device at a second receiving moment before the first receiving moment determined by the determining module 1420, where the reference signal is used by the base station solution And adjusting, by the determining module 1420, the uplink data sent by the terminal device, where the uplink data is data carried by an uplink physical channel.
  • the sending module 1410 may send the downlink data that is carried on the downlink physical channel to the terminal device.
  • the determining module 1420 may determine the receiving time of the uplink data corresponding to the sent downlink data (which may be referred to as the first receiving moment). And determining that the first receiving moment may also be performed before transmitting downlink data to the terminal device, or both.
  • the sending module 1330 may send a reference signal to the base station at a second sending moment before the first sending moment.
  • the receiving module 1430 may receive the reference signal sent by the terminal device at the second receiving moment before the first receiving moment.
  • the base station may perform channel estimation based on the reference signal and correct wireless channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • the receiving module 1430 may further receive the uplink data sent by the terminal device at the first receiving time, where the specific implementation process may be implemented according to the method described in steps 801-803. .
  • the time length of the uplink physical channel is less than 0.5 milliseconds, and the length of the reference signal is less than or equal to the length of time of the uplink physical channel.
  • the determining module 1420 is further configured to:
  • the receiving module 1430 is specifically configured to:
  • the downlink data is data carried by the physical downlink shared channel PDSCH or downlink semi-persistent scheduling release signaling, where the uplink data is a hybrid automatic repeat request corresponding to the downlink data. Correctly respond to HARQ-ACK information;
  • the determining module 1420 is specifically configured to:
  • the T Delay is a preset delay interval.
  • the determining module 1410 may determine the first receiving time according to the sending time of the downlink data, where the first receiving time may be the time corresponding to the delay after the transmission delay T Delay .
  • the delay interval T Delay may be a standard pre-defined, and the base station may store the delay interval T Delay .
  • the determining module can learn the sending time of the downlink data, and the time when the sending time of the downlink data is delayed by the T Delay can be used as the base station receiving the HARQ-ACK information of the PUCCH or the PUSCH transmitted by the terminal device.
  • the first receiving time, wherein T Delay is a preset delay interval.
  • the setting of the T Delay needs to consider the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where the T process is the terminal device.
  • T Delay the processing time of the terminal device (including the demodulation time of the downlink data and the generation time of the uplink data), that is, T Delay ⁇ T process , where the T process is the terminal device.
  • Processing time wherein the specific implementation process can be implemented according to the method described in case one in step 801.
  • the T Delay is 4*L DL
  • the L DL is a transmission time interval TTI of the downlink data
  • the downlink data has a TTI less than 0.5 milliseconds.
  • the downlink data is a high-level command, where the high-level command includes signaling for indicating the first receiving moment, and the uplink data includes channel state information CSI, where the specific implementation process may be performed according to step 801.
  • the specific implementation process may be performed according to step 801. The method described in Cases 2 and 3 is implemented.
  • the uplink data is data carried by the PUCCH
  • the reference signal is a demodulation reference signal used for the PUCCH demodulation
  • the TTI of the downlink data is 1 symbol
  • the length of the PUCCH is 1 symbol
  • the reference signal has a length of time of 1 symbol
  • the determining module 1420 is specifically configured to:
  • the first receiving time is a time when the sending time of the downlink data is delayed by 4 symbols
  • the receiving module 1430 is specifically configured to:
  • the determining module 1420 may send the data according to the The sending time determines the receiving time of the data carried by the terminal device and is carried by the PUCCH, wherein the time at which the uplink data is received (ie, the first receiving time) may be a time length of TTI delayed by 4 times of the downlink data, and at this time, the downlink The TTI of the data is one symbol, that is, the time at which the first reception time is the delay of the transmission time of the downlink data by 4 symbols.
  • the determining module may further determine a receiving moment of the reference signal sent by the terminal device, where the length of the reference signal is less than or equal to the length of the PUCCH, and when the length of the PUCCH is 1 symbol, The time length of the reference signal may be 1 symbol, and thus, the receiving module 1430 may receive the reference signal transmitted by the terminal device at the time when the transmission time of the downlink data is delayed by 3 symbols. After receiving the reference signal sent by the terminal device, the receiving module 1430 may further receive the uplink data carried by the terminal device and corresponding to the downlink data and transmitted by the PUCCH at the time of delaying the transmission of the downlink data by 4 symbols.
  • the uplink data is data carried by the PUCCH
  • the reference signal is a demodulation reference signal used for the PUCCH demodulation
  • the TTI of the downlink data is 1 symbol
  • the length of the PUCCH is 2 symbols
  • the reference signal has a length of time of 1 symbol or 2 symbols;
  • the determining module 1420 is specifically configured to:
  • the first receiving time is a time when the sending time of the downlink data is delayed by 8 symbols
  • the receiving module 1430 is specifically configured to:
  • the determining module 1420 may determine, according to the sending time, a receiving moment of the data that is sent by the terminal device and is carried by the PUCCH, where the time at which the uplink data is received (ie, the first receiving time) may be The time length of the TTI is 4 times longer than the transmission time. At this time, the TTI of the downlink data is 2 symbols, that is, the time when the first reception time is 8 bits of the transmission time of the downlink data is determined.
  • the determining module 1420 may further determine a receiving moment of the reference signal sent by the terminal device, where the length of the reference signal is less than or equal to the length of the PUCCH, when the length of the PUCCH is 2 symbols.
  • the length of the reference signal may be 1 symbol or 2 symbols.
  • the receiving module 1430 may delay the transmission of the downlink data by 7 symbols, and receive the terminal.
  • the reference signal sent by the device when the reference signal has a length of 2 symbols, the receiving module 1430 can receive the reference signal sent by the terminal device at the time of delaying the transmission of the downlink data by 6 symbols.
  • the receiving module 1430 may also The uplink data carried in the PUCCH corresponding to the downlink data transmitted by the terminal device is received at the time when the transmission time of the downlink data is delayed by 8 symbols.
  • the downlink data sent by the base station is received, and the first sending time is determined according to the downlink data, and the reference signal is sent to the base station at the second sending time before the first sending time, and is sent to the base station at the first sending time.
  • the uplink data is data carried by the uplink physical channel.
  • the base station can perform uplink data demodulation according to the reference signal sent by the terminal device, which can improve the correct reception probability of the uplink data.
  • the uplink data can also be sent as early as possible to reduce the air interface delay.
  • This embodiment provides a system for transmitting uplink data.
  • the system provided in this embodiment can implement the process of the embodiment shown in FIG. 4, 6, 7, 8, 10, 11, and 12 of the present invention.
  • the terminal device of the embodiment shown in Figure 13 the base station is the base station of the embodiment shown in Figures 3 and 14, the system comprising the terminal device and the base station, wherein:
  • the base station is configured to send downlink data to the terminal device, and determine a first receiving time, where the first receiving time is a time when the base station receives the uplink data that is sent by the terminal device and is corresponding to the downlink data.
  • the terminal device is configured to receive downlink data sent by the base station, and determine, according to the downlink data, a first sending time, where the first sending time is that the terminal device sends, to the base station, a downlink data corresponding to the downlink data. Time of uplink data; transmitting a reference signal to the base station at a second transmission time before the first transmission time; and transmitting uplink data to the base station at the first transmission time.
  • the base station may send downlink data carried by the downlink physical channel to the terminal device, and may determine a receiving moment (which may be referred to as a first receiving time) of the uplink data corresponding to the sent downlink data.
  • the terminal device may receive the downlink data sent by the base station, and determine the sending time of the uplink data corresponding to the received downlink data (which may be referred to as a first sending time).
  • the terminal device demodulates the uplink data, and configures the uplink data according to the demodulation result. Therefore, the terminal device needs to complete the uplink data after the uplink data is demodulated.
  • the terminal device needs to send a reference signal for uplink physical channel demodulation to the base station, so that the base station performs channel estimation based on the reference signal, and corrects The radio channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • the terminal device may send a reference signal to the base station at a second sending moment before the first sending moment.
  • the base station may receive the reference signal sent by the terminal device at the second receiving moment before the first receiving moment. After receiving the reference signal at the second receiving moment, the base station may perform channel estimation based on the reference signal, and correct wireless channel fading experienced by the uplink physical channel, thereby better demodulating the uplink data.
  • the terminal device may send the uplink data to the base station at the first sending time, where the uplink data may be data carried by the uplink physical channel, for example, uplink control carried on the PUCCH or the PUSCH.
  • Information (including HARQ-ACK information and/or CSI, or uplink service data and/or control information feedback carried on the PUSCH.
  • the base station may be at the first receiving moment.
  • uplink data sent by the terminal device may be data carried by the uplink physical channel, for example, uplink control information (including HARQ-ACK information and/or CSI, or uplink carried on the PUSCH) carried on the PUCCH or the PUSCH.
  • uplink control information including HARQ-ACK information and/or CSI, or uplink carried on the PUSCH
  • Service data and/or control information feedback can be implemented according to the methods described in steps 1201-1206, steps 401-403, and steps 801-803.

Abstract

Une mode de réalisation de la présente invention appartient au domaine technique de la communication sans fil et concerne un procédé, un dispositif, et un système de transmission de données en liaison montante. Le procédé consiste à : recevoir des données de liaison descendante transmises par une station de base et déterminer un premier instant de transmission selon les données de liaison descendante; transmettre un signal de référence à la station de base à un second instant de transmission antérieur au premier instant de transmission; transmettre les données de liaison montante à la station de base au premier instant de transmission, les données de liaison montante étant les données transportées par le canal physique de liaison montante. La présente invention peut améliorer la probabilité d'une réception précise des données de liaison montante par la station de base.
PCT/CN2015/093772 2015-11-04 2015-11-04 Procédé, dispositif et système de transmission de données en liaison montante WO2017075770A1 (fr)

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CN113037455A (zh) * 2017-11-16 2021-06-25 华为技术有限公司 发送和接收信息的方法及装置
CN113037455B (zh) * 2017-11-16 2022-04-12 华为技术有限公司 发送和接收信息的方法及装置
US11395317B2 (en) 2017-11-16 2022-07-19 Huawei Technologies Co., Ltd. Information sending and receiving method, and information sending and receiving apparatus
WO2022068620A1 (fr) * 2020-09-30 2022-04-07 华为技术有限公司 Procédé et appareil de transmission de données

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