WO2017075770A1

WO2017075770A1 - Uplink data transmission method, device and system

Info

Publication number: WO2017075770A1
Application number: PCT/CN2015/093772
Authority: WO
Inventors: 李超君
Original assignee: 华为技术有限公司
Priority date: 2015-11-04
Filing date: 2015-11-04
Publication date: 2017-05-11
Also published as: CN108353388A

Abstract

An embodiment of the present invention belongs to the technical field of wireless communication and discloses an uplink data transmission method, device and system. The method comprises: receiving downlink data transmitted by a base station and determining a first transmission time according to the downlink data; transmitting a reference signal to the base station at a second transmission time before the first transmission time; transmitting the uplink data to the base station at the first transmission time, the uplink data being the data carried by the uplink physical channel. The present invention can improve the probability of an accurate reception of the uplink data by the base station.

Description

Method, device and system for transmitting uplink data

Technical field

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.

Background technique

In the LTE (Long Term Evolution) system, 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). When the signaling is released, 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. When it is correct, the terminal device feeds back ACK (Acknowledgement), and when the PDSCH receives an error, the terminal device feeds back NACK (Non-Acknowledgement). In addition, the terminal device also transmits channel state information (CSI, Channel State Information) carried on the PUCCH to the base station.

In wireless communication systems, latency is one of the important factors affecting the user experience. The transmission mechanism based on the transmission time interval (TTI) of one subframe cannot meet the requirements of low-latency services. Wherein, the duration of one subframe is 1 millisecond, and 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. In order to further reduce the delay, the TTI of the data needs to be reduced to the duration of 1 slot or even the duration of 1 OFDM symbol. However, when the length of the PUCCH is changed from the original 1 subframe to 1 slot or even 1 symbol, The power available to the terminal device for transmitting the PUCCH is greatly reduced, resulting in a decrease in the correct reception probability of the base station for the PUCCH.

Summary of the invention

In order to achieve the purpose of improving the correct reception probability of the uplink data by the base station during the short TTI transmission, the embodiment of the present invention provides a method, an apparatus, and a system for transmitting uplink data. The technical solution is as follows:

In a first aspect, a method for transmitting uplink data is provided, the method 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. Preferably, 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). 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.

After the base station sends the downlink data carried by the downlink physical channel to the terminal device, 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. 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 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.

With reference to the first aspect, in a first possible implementation manner of the first aspect, 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.

In this way, the HARQ RTT can be effectively reduced, and in turn, the delay can be reduced.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the terminal device sends a second sending moment before the first sending moment The base station sends a reference signal, including:

Determining, by the terminal device, that 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.

After receiving the downlink data sent by the base station, the terminal device may determine the second sending time, that is, the sending time corresponding to the reference signal. If L _{RS is used to} indicate the length of the reference signal, T ₁ represents the first transmission time, and T ₂ represents the second transmission time, then T ₂ = T _{1 -} L _RS .

In this way, 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.

With reference to the first aspect or the first and second possible implementation manners of the first aspect, in the third possible implementation manner of the first aspect, 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. .

After receiving the downlink data, the terminal device determines whether the received downlink data is correct. Further, the terminal device can feed back the HARQ-ACK information to the base station. The delay interval T _Delay may be a standard pre-defined, and the terminal device may 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 T _process is the processing time of the terminal device.

In this way, the terminal device can have sufficient time to demodulate the received downlink data and configure the uplink data before transmitting the uplink data.

With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the T _Delay is 4*L _DL , and 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. For the FDD (Frequency Division Duplex) system, 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 .

In this way, the delay can be reduced.

With reference to the first aspect or the first and second possible implementation manners of the first aspect, in the fifth possible implementation manner of the first aspect, 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.

With reference to the first aspect or the first to fourth possible implementation manners of the first aspect, in the sixth possible implementation manner of the first aspect, 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, that the first sending time is a time when the receiving time of the downlink data is delayed by 4 symbols;

Sending, by the terminal device, a reference signal to the base station at a second sending moment before the first sending moment, including:

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.

After receiving the downlink data sent by the base station, 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. When the reception time of the downlink data is delayed by three symbols, 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.

Thus, 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.

With reference to the first aspect or the first to fourth possible implementation manners of the first aspect, in the seventh possible implementation manner of the first aspect, 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, 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;

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.

After receiving the downlink data sent by the base station, 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. When the length of the PUCCH is 2 symbols, the length of the reference signal may be 1 symbol or 2 For the symbol, when the time length of the reference signal is 1 symbol, 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. .

Thus, 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.

In a second aspect, a method for transmitting uplink data is provided, the method 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;

Receiving, by the base station, 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;

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.

With reference to the second aspect, in a first possible implementation manner of the second aspect, 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.

With reference to the second aspect or the first possible implementation of the second aspect, in a second possible implementation manner of the second aspect, the base station receives the terminal at a second receiving moment before the first receiving moment Reference signals sent by the device, including:

Determining, by the base station, that the second receiving moment is a time when the first receiving moment is forward L _RS , and the L _RS is a length of time of the reference signal;

The base station receives the reference signal sent by the terminal device at the second receiving moment.

After the base station sends the downlink data to the terminal device, the second receiving moment, that is, the receiving moment corresponding to the reference signal, may be determined. If L _{RS is used to} indicate the length of the reference signal, T ₃ represents the first reception time, and T ₄ represents the second reception time, then T ₄ = T _{3 -} L _RS .

In combination with the second aspect or the first and second possible implementations of the second aspect, in the second aspect In a third possible implementation, the downlink data is data carried by the physical downlink shared channel (PDSCH) or the downlink semi-persistent scheduling release signaling, and the uplink data is a hybrid automatic retransmission request corresponding to the downlink data, and the HARQ is correctly acknowledged. 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.

After the base station sends the downlink data to the terminal device, 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 T _process is the processing time of the terminal device.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the T _Delay is 4*L _DL , and 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. For the FDD (Frequency Division Duplex) system, 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 .

In this way, the delay can be reduced.

With reference to the second aspect or the first and second possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, 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.

With reference to the second aspect or the first to fourth possible implementation manners of the second aspect, in the sixth possible implementation manner of the second aspect, 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:

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:

Receiving, by the base station, the reference signal sent by the terminal device at a time when the transmission time of the downlink data is delayed by 3 symbols;

Receiving, by the base station, the uplink data sent by the terminal device at 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.

After the downlink data is sent by the base station to the terminal device, 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 time length of the TTI of the data. At this 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.

Thus, 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.

With reference to the second aspect or the first to fourth possible implementation manners of the second aspect, in the seventh possible implementation manner of the second aspect, 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:

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 a time when the transmission time of the downlink data is delayed by 7 symbols or 6 symbols;

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.

After the downlink data is sent by the base station to the terminal device, 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 time length of the TTI of the data. 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 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. When the length of the PUCCH is 2 symbols, the length of the reference signal may be 1 symbol, or may be 2 symbols, when the time length of the reference signal is 1 symbol, 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. Uplink data carried on the PUCCH.

Thus, 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.

In a third aspect, a terminal device is provided, where the terminal device 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;

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.

With reference to the third aspect, in a first possible implementation manner of the third aspect, 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.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect, the processor is specifically configured to:

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:

And transmitting, at the second sending moment determined by the processor, the reference signal to the base station.

With reference to the third aspect or the first and second possible implementation manners of the third aspect, in the third possible implementation manner of the third aspect, 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:

Determining that 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.

With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the T _Delay is 4*L _DL , and the L _DL is a transmission time interval TTI of the downlink data. The downlink data has a TTI less than 0.5 milliseconds.

With reference to the third aspect or the first and second possible implementation manners of the third aspect, in a fifth possible implementation manner of the third aspect, 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 first to fourth possible implementations of the third aspect or the third aspect are combined. In a sixth possible implementation manner of the third aspect, the uplink data is data carried by a physical uplink control channel (PUCCH), the TTI of the downlink data is 1 symbol, and the length of the PUCCH is 1 symbol. The length of the reference signal is 1 symbol;

The processor is specifically configured to:

Determining that 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:

And transmitting 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 3 symbols; delaying the receiving time of the downlink data received by the receiver At the time of 4 symbols, the uplink data carried by the PUCCH is transmitted to the base station.

The first to fourth possible implementations of the third aspect or the third aspect are combined. In a seventh possible implementation manner of the third aspect, the uplink data is data carried by a PUCCH, the TTI of the downlink data is 2 symbols, and the length of the PUCCH is 2 symbols, and the reference signal is The length of time is 1 symbol or 2 symbols;

The processor is specifically configured to:

Determining that 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:

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.

In a fourth aspect, a base station is provided, the 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.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, 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.

In combination with the fourth aspect or the first possible implementation of the fourth aspect, the second in the fourth aspect In a possible implementation manner, the processor is specifically configured to:

Determining that 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:

Receiving, at the second receiving moment, the reference signal sent by the terminal device.

With reference to the fourth aspect or the first and second possible implementation manners of the fourth aspect, in the third possible implementation manner of the fourth aspect, 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:

Determining that the first receiving time is a time when the sending time of the downlink data sent by the transmitter is delayed by T _Delay , and the T _Delay is a preset delay interval.

With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the T _Delay is 4*L _DL , and the L _DL is a transmission time interval TTI of the downlink data. The downlink data has a TTI less than 0.5 milliseconds.

With reference to the fourth aspect, or the first and second possible implementation manners of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, 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.

With reference to the fourth aspect, or the first to fourth possible implementation manners of the fourth aspect, in the sixth possible implementation manner of the fourth aspect, 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:

Determining that 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:

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.

In combination with the fourth aspect or the first to fourth possible implementations of the fourth aspect, in the fourth aspect In a seventh possible implementation, 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, and the length of the reference signal is 1 Symbol or 2 symbols;

The processor is specifically configured to:

Determining that 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:

Receiving, at a time when the transmission time of the downlink data sent by the transmitter is delayed by 7 symbols or 6 symbols, receiving the reference signal sent by the terminal device; and the downlink data sent by the transmitter When the transmission time is delayed by 8 symbols, the uplink data carried by the terminal device and carried by the PUCCH is received.

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.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, 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.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in the second possible implementation manner of the fifth aspect, the determining module is further configured to:

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:

And transmitting, by the base station, the reference signal to the base station at the second sending moment determined by the determining module.

With reference to the fifth aspect or the first and second possible implementation manners of the fifth aspect, in the third possible implementation manner of the fifth aspect, 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:

Determining 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.

With reference to the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the T _Delay is 4*L _DL , and the L _DL is a transmission time interval TTI of the downlink data. The downlink data has a TTI less than 0.5 milliseconds.

With reference to the fifth aspect or the first and second possible implementation manners of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, 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.

With reference to the fifth aspect or the first to fourth possible implementation manners of the fifth aspect, in the sixth possible implementation manner of the fifth aspect, 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:

Determining that 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:

Transmitting the reference signal to the base station at a time when the receiving time of the downlink data is delayed by 3 symbols, and transmitting the bearer to the PUCCH to the base station at a time when the receiving time of the downlink data is delayed by 4 symbols Upstream data.

With reference to the fifth aspect or the first to fourth possible implementation manners of the fifth aspect, in the seventh possible implementation manner of the fifth aspect, 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:

Determining that 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:

At the time when the reception time of the downlink data is delayed by 7 symbols or 6 symbols, 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.

In a sixth aspect, a base station is provided, 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.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, 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.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in the second possible implementation manner of the sixth aspect, the determining module is further configured to:

Determining that 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:

And receiving, at the second receiving moment determined by the determining module, the reference signal sent by the terminal device.

With reference to the sixth aspect or the first and second possible implementation manners of the sixth aspect, in the third possible implementation manner of the sixth aspect, 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:

Determining 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.

With reference to the third possible implementation manner of the sixth aspect, in a fourth possible implementation manner of the sixth aspect, the T _Delay is 4*L _DL , and the L _DL is a transmission time interval TTI of the downlink data. The downlink data has a TTI less than 0.5 milliseconds.

With reference to the sixth aspect, or the first and second possible implementation manners of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, 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.

With reference to the sixth aspect or the first to fourth possible implementation manners of the sixth aspect, in the sixth possible implementation manner of the sixth aspect, 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:

Determining that 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:

Receiving, by the terminal device, the reference signal sent by the terminal device at a time when the transmission time of the downlink data is delayed by 3 symbols; receiving the terminal device to send when the transmission time of the downlink data is delayed by 4 symbols Uplink data carried on the PUCCH.

With reference to the sixth aspect or the first to fourth possible implementation manners of the sixth aspect, in the seventh possible implementation manner of the sixth aspect, 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:

Determining that 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:

Receiving, at a time when the transmission time of the downlink data is delayed by 7 symbols or 6 symbols, receiving the reference signal sent by the terminal device; at a time when the transmission time of the downlink data is delayed by 8 symbols, the receiving station The uplink data carried by the terminal device and carried by the PUCCH.

In a seventh aspect, a system for transmitting uplink data is provided, the system 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. Receiving, at a second receiving moment before the first receiving moment, a reference signal sent by the terminal device, where the reference signal is used by the base station to demodulate the uplink data; at the first receiving moment Receiving uplink data sent by the terminal device, where the number of uplinks According to the data carried by the uplink physical channel;

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 beneficial effects brought by the technical solutions provided by the embodiments of the present invention are:

In the embodiment of the present invention, 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. For uplink data, the uplink data is data carried by the uplink physical channel. In this way, 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. In addition, the uplink data can also be sent as early as possible to reduce the air interface delay.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a schematic diagram of a system framework provided by an embodiment of the present invention;

2 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

3 is a schematic structural diagram of a base station according to an embodiment of the present invention;

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.

detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

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, 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"). The base station may send downlink data that is carried by the downlink physical channel to the terminal device. After receiving the downlink data sent by the base station, the terminal device may generate uplink data corresponding to the downlink data, and send the uplink data to the base station, as shown in FIG. 1 .

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. In the present invention, the processor 220 may be configured to determine a correlation process of the transmission time of the uplink data. Optionally, 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. In the present invention, 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. In particular, the program can include program code, the program code including computer operating instructions.

The technical solution of the embodiment of the present invention can be applied to various communication systems, for example, Global System of Mobile communication ("GSM") system, Code Division Multiple Access (CDMA). System, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service ("GPRS"), Long Term Evolution (Long Term Evolution, referred to as "Long Term Evolution" LTE") system, LTE Frequency Division Duplex ("FDD") system, LTE Time Division Duplex ("TDD"), Universal Mobile Telecommunication System (Universal Mobile Telecommunication System) It is "UMTS", and other wireless communication systems using orthogonal frequency division (OFDM) technology.

In order to facilitate the understanding of the embodiments of the present invention, the basic concepts involved in the embodiments of the present invention are first described below. The LTE system is taken as an example, but the embodiment of the present invention is not applicable to the LTE system. In fact, any wireless communication system that performs data transmission by scheduling may adopt the solution provided by the embodiment of the present invention.

First, the frame structure

In the LTE system, each radio frame is composed of 10 subframes of 1 ms length, and each subframe includes 2 slots.

For a normal cyclic prefix (normal CP), each slot consists of 7 symbols, that is, each slot is numbered {#0, #1, #2, #3, #4, #5 , symbolic composition of #6}; for extended CP (extended CP), 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.

Second, the physical channel and physical signals

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. Preferably, in the present invention, 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.

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.

Third, channel status information

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).

The processing flow shown in FIG. 4 will be described in detail below with reference to specific implementations, and the content can be as follows:

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. Preferably, 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). Corresponding to the downlink data 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.

In the implementation, after the base station sends the downlink data carried by the downlink physical channel to the terminal device, 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).

Optionally, the first sending moment may be determined in different manners according to the received downlink data.

In the first case, 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. For example, the downlink data is the data carried by the physical downlink shared channel PDSCH or the downlink semi-persistent scheduling release signaling, and 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).

In the implementation, after receiving the downlink data, the terminal device determines whether the received downlink data is correct, and further, may feed back the HARQ-ACK information to the base station. When the downlink data is received correctly, 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. .

Optionally, 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.

Optionally, 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. Specifically, 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. . For the FDD (Frequency Division Duplex) system, 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 . To reduce the delay, 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. For example, if the TTI of the PDSCH is 1 symbol and the downlink data starts transmission at symbol n, then 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. For a TDD (Time Division Duplex) system, 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 . Determine the transmission time of the uplink data according to the HARQ timing, and 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.

In the second case, the uplink data is the uplink data indicated by the downlink data. For example, when the downlink data is a high layer command, 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.

In the implementation, when the downlink data is 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. In other words, when the downlink data is high-layer signaling, where the high-level command includes signaling for indicating the first sending moment, 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).

In the third case, the uplink data is the uplink data of the downlink data scheduling. When the downlink data is DCI, 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. In this case, when receiving the downlink data to determine the first sending time, 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. Optionally, 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. Optionally, 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. Specifically, 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. . For the FDD system, 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. When the uplink physical channel carrying the uplink data is a PUCCH, 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.

In the implementation, 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. For the first case, 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. At the first transmission time, as shown in FIG. 5(a). In this way, sending the RS in advance does not affect the RTT, and improves the correct reception probability of the uplink data. For Case 2 and Case 3, 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.

Optionally, before the reference signal is sent, the sending time corresponding to the reference signal may be determined. Correspondingly, 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.

In an implementation, after receiving the downlink data sent by the base station, the terminal device may determine the second sending time, that is, the sending time corresponding to the reference signal. If L _{RS is used to} indicate the length of the reference signal, T ₁ represents the first transmission time, and T ₂ represents the second transmission time, then T ₂ = T _{1 -} L _RS . In this way, 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). For another example, 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. For another example, 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.

Optionally, 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. Wherein symbol i is one of the symbols occupied by the reference signal. When the reference signal occupies only one symbol, the reference signal is located at symbol i. When the reference signal occupies two or more symbols, the reference signal includes a reference signal located on symbol i. It should be noted that the first cyclic shift is different from the second cyclic shift, and 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. In this way, when the RS sent by the terminal device in the embodiment of the present invention and the PUCCH sent by other terminal devices or RSs of other terminal devices exist on the symbol i, the code division multiplexing can be performed.

After determining the second sending time according to the foregoing method, 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.

In an implementation, after the terminal device sends the reference signal to the base station, 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.

Optionally, 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.

In this way, 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. In addition, the uplink data can also be sent as early as possible to reduce the air interface delay.

In this embodiment, 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, and the time length of the reference signal is 1 symbol, for example, The steps of the reference signal and the uplink data are described in detail as shown in FIG. 6.

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.

In an implementation, after receiving the downlink data sent by the base station, 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.

In an implementation, after receiving the downlink data sent by the base station, 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. When 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.

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.

In the implementation, after the terminal device sends the reference signal to the base station, 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.

In this embodiment, 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, and the time length of the reference signal is 1 symbol or 2 symbols. For example, the steps of transmitting the reference signal and the uplink data are described in detail, as shown in FIG.

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.

In an implementation, after receiving the downlink data sent by the base station, 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.

In an implementation, after receiving the downlink data sent by the base station, 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. When the length of the PUCCH is 2 symbols, the length of the reference signal may be 1 symbol or 2 symbols. When the length of the reference signal is 1 symbol, 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. When the time length of the reference signal is 2 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.

In the implementation, after the terminal device sends the reference signal to the base station, 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.

Thus, 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.

The processing flow of the base station side as shown in FIG. 8 will be described in detail below with reference to specific embodiments, and the content may be as follows:

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.

In an implementation, 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.

Optionally, the first receiving moment may be determined in different manners according to different downlink data sent.

In the first case, 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. For example, the downlink data is the data carried by the physical downlink shared channel PDSCH or the downlink semi-persistent scheduling release signaling, and 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.

In the implementation, after the base station sends the downlink data to the terminal device, 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. .

Optionally, 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. Specifically, 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. . For the FDD (Frequency Division Duplex) system, 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 . To reduce the delay, 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. For example, if the TTI of the PDSCH is 1 symbol and the downlink data starts transmitting at symbol n, 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. For the TDD (Time Division Duplex) system, 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.

In the second case, the uplink data is the uplink data indicated by the downlink data. For example, when the downlink data is a high layer command, 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.

In an implementation, 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. After the base station determines the reception time of the periodic CSI (that is, the first reception time), the base station may send the high layer signaling to the terminal device. It should be noted that, when the terminal device receives the high layer signaling, 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.

In the third case, the uplink data is the uplink data of the downlink data scheduling. When the downlink data is DCI, 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. In this case, when 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. Optionally, 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. Specifically, 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. Specifically, 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. . For the FDD system, 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. When the uplink physical channel carrying the uplink data is a PUCCH, 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.

In an implementation, 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. 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. For the first case, 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. As shown in FIG. 9( a ), correspondingly, the time at which the base station receives the reference signal (ie, the second reception time) may be earlier than the first reception time. In this way, receiving the RS in advance does not affect the RTT, and improves the correct reception probability of the uplink data. For Case 2 and Case 3, 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.

Optionally, before receiving the reference signal, the receiving moment corresponding to the reference signal may be determined first. Correspondingly, 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.

In an implementation, after the base station sends the downlink data to the terminal device, the second receiving moment, that is, the receiving moment corresponding to the reference signal, may be determined. If L _{RS is used to} indicate the length of the reference signal, T ₃ represents the first reception time, and T ₄ represents the second reception time, then T ₄ = T _{3 -} L _RS . In this way, 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). For another example, 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. For another example, 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.

Optionally, before or after receiving the reference signal, the base station further includes: determining a first cyclic shift; and generating a reference signal located on the symbol i according to the first cyclic shift. Wherein symbol i is one of the symbols occupied by the reference signal. When the reference signal occupies only one symbol, the reference signal is located at symbol i. When the reference signal occupies two or more symbols, the reference signal includes a reference signal located on symbol i. It should be noted that the first cyclic shift is different from the second cyclic shift, and 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. In this way, when the RS sent by the terminal device in the embodiment of the present invention and the PUCCH sent by other terminal devices or RSs of other terminal devices exist on the symbol i, the code division multiplexing can be performed. It should be noted, 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.

After determining the second receiving moment according to the foregoing method, 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.

In an implementation, after receiving the reference signal sent by the terminal device, 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.

In this embodiment, 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, and 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.

In the implementation, after the base station sends the downlink data to the terminal device, 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.

In an implementation, after the base station sends the downlink data to 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 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. The reference signal sent.

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.

In the implementation, after receiving the reference signal sent by the terminal device, 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.

Thus, 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.

In this embodiment, 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, and the time length of the reference signal is 1 symbol or 2 symbols. For example, the steps of receiving the reference signal and the uplink data are described in detail, as shown in FIG.

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.

In the implementation, after the base station sends the downlink data to the terminal device, 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. In this case, 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.

In an implementation, after the base station sends the downlink data to 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. When the length of the reference signal is 1 symbol, 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.

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.

In an implementation, after receiving the reference signal sent by the terminal device, 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.

Thus, 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.

The processing flow of the system shown in FIG. 12 will be described in detail below with reference to specific embodiments, and the content can be as follows:

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.

In an implementation, 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.

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.

In the implementation, 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.

In an implementation, 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.

In an implementation, after the terminal device sends the reference signal to the base station, 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.

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.

In the embodiment of the present invention, 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. In this way, 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. In addition, the uplink data can also be sent as early as possible to reduce the air interface delay.

Based on the same concept, the embodiment of the present invention further provides a terminal device. As shown in FIG. 2, 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.

In an implementation, after the base station sends the downlink data carried by the downlink physical channel to the terminal device, 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). 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. In addition, 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. After transmitting the reference signal to the base station, 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.

Optionally, 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.

Optionally, the processor 220 is specifically configured to:

Determining that 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:

And transmitting, at the second sending moment determined by the processor 220, the reference signal to the base station.

In an implementation, after the receiver 210 receives the downlink data sent by the base station, the processor 220 may determine the second sending moment, that is, the sending moment corresponding to the reference signal. If L _{RS is used to} indicate the length of the reference signal, T ₁ represents the first transmission time, and T ₂ represents the second transmission time, then T ₂ = T _{1 -} L _RS . In this way, 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. After the processor 220 determines the second transmission time, the transmitter 230 can send the configured reference signal to the base station at the second transmission time.

Optionally, 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:

Determining that 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.

In the implementation, after the receiver 210 receives the downlink data, 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. After receiving the downlink data, 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 first transmission time of the information, wherein T _{Delay is a} preset delay interval.

Optionally, 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, wherein the specific implementation process can be implemented according to the method described in the first case in step 401.

Optionally, the T _Delay is 4*L _DL , the L _DL is a transmission time interval TTI of the downlink data, and the downlink data has a TTI less than 0.5 milliseconds.

Optionally, 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 method described in Cases 2 and 3 is implemented.

Optionally, 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, and 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:

Determining that 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:

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 3 symbols; and receiving time of the downlink data received by the receiver 210 The uplink data carried in the PUCCH is transmitted to the base station at the time of delaying 4 symbols.

In an implementation, after receiving the downlink data sent by 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. 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. After receiving the downlink data sent by the base station, the processor 220 may further determine a sending moment of transmitting the reference signal to the base station. Preferably, 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 In the case of a symbol, 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.

Optionally, 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, and 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:

Determining that 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:

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.

In an implementation, after receiving the downlink data sent by 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. At this time, the TTI of the downlink 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. After receiving the downlink data sent by the base station, the processor 220 may further determine a sending moment of transmitting the reference signal to the base station. Preferably, 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 When the symbol is used, the time length of the reference signal may be 1 symbol or 2 symbols. When the time length of the reference signal is 1 symbol, 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. When the time length of the reference signal is 2 symbols, 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. After transmitting the reference signal to the base station, 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.

Based on the same concept, the embodiment of the present invention further provides a base station. As shown in FIG. 3, 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.

In an implementation, the transmitter 330 may send downlink data that is carried by the downlink physical channel to the terminal device. After the sending, 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. After receiving the reference signal at the second receiving time, 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. After receiving the reference signal sent by the terminal device, 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.

Optionally, the processor 320 is specifically configured to:

Determining that 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:

In an implementation, after the transmitter 330 sends the downlink data to the terminal device, the processor 320 may determine the second receiving moment, that is, the receiving moment corresponding to the reference signal. If L _{RS is used to} indicate the length of the reference signal, T ₃ represents the first reception time, and T ₄ represents the second reception time, then T ₄ = T _{3 -} L _RS . In this way, 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 processor 320 is specifically configured to:

Determining that 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.

In the implementation, after the transmitter 330 sends the downlink data to the terminal device, 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 . After the transmitter 330 sends the downlink data to the terminal, 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 first receiving moment of the ACK information, where T _{Delay is a} preset delay interval.

Optionally, 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, wherein the specific implementation process can be implemented according to the method described in case one in step 801.

Optionally, 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 method described in Cases 2 and 3 is implemented.

Optionally, 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, and 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:

Determining that 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:

At the time when the transmission time of the downlink data sent by the transmitter 330 is delayed by 3 symbols, Receiving the reference signal sent by the terminal device; receiving uplink data carried by the terminal device and transmitting the PUCCH at a time when the transmission time of the downlink data sent by the transmitter 330 is delayed by 4 symbols.

In an implementation, after the transmitter 330 sends the downlink data to the terminal device, 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. In this case, 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. After the transmitter 330 sends the downlink data 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 PUCCH is 1 In the case of a symbol, 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. After the receiver 310 receives the reference signal sent by the terminal device, 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.

Optionally, 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, and 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:

Determining that 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:

Receiving, at a time when the transmission time of the downlink data sent by the transmitter 330 is delayed by 7 symbols or 6 symbols, receiving the reference signal sent by the terminal device; the downlink sent by the transmitter 330 The time when the data is transmitted is delayed by 8 symbols, and the uplink data carried by the terminal device and carried by the PUCCH is received.

In an implementation, after the transmitter 330 sends the downlink data to the terminal device, 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. In this case, 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. When the time length of the reference signal is 1 symbol, 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. When the time length of the reference signal is 2 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. After the receiver 310 receives the reference signal sent by the terminal device, 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.

Based on the same concept, the embodiment of the present invention further provides a terminal device. As shown in FIG. 13, 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.

In the implementation, after the base station sends the downlink data that is carried by the downlink physical channel to the terminal device, 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. In addition, 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. After the sending module 1330 sends the reference signal to the base station, 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.

Optionally, the determining module 1320 is further configured to:

Determining that 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:

And at the second sending moment determined by the determining module 1320, sending the reference signal to the base station.

In an implementation, after the terminal device receives the downlink data sent by the base station, the determining module 1320 may determine the second sending moment, that is, the sending moment corresponding to the reference signal. If L _{RS is used to} indicate the length of the reference signal, T ₁ represents the first transmission time, and T ₂ represents the second transmission time, then T ₂ = T _{1 -} L _RS . In this way, 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. After the determining module 1320 determines the second sending moment, the sending module 1330 can send the configured reference signal to the base station at the second sending moment.

The determining module 1320 is specifically configured to:

In the implementation, after the terminal device receives the downlink data, 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. After the terminal device receives the downlink data, 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 determining module 1320 is specifically configured to:

The sending module 1330 is specifically configured to:

In the implementation, after the terminal device receives the downlink data sent by the base station, 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. At this time, 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. After the terminal device receives the downlink data sent by the base station, 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.

The determining module 1320 is specifically configured to:

The sending module 1330 is specifically configured to:

Transmitting 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; and when the receiving time of the downlink data is delayed by 8 symbols, to the base station The uplink data carried on the PUCCH is transmitted.

In the implementation, after the terminal device receives the downlink data sent by the base station, 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. At this time, 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. After the terminal device receives the downlink data sent by the base station, 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. When the time length of the reference signal is 1 symbol, 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. When the time length of the reference signal is 2 symbols, 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. After transmitting the reference signal to the base station, 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.

Based on the same concept, the embodiment of the present invention further provides a base station. As shown in FIG. 14, 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.

In the implementation, the sending module 1410 may send the downlink data that is carried on the downlink physical channel to the terminal device. After the sending, 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. Correspondingly, the receiving module 1430 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. After receiving the reference signal sent by the terminal device, 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. .

Optionally, the determining module 1420 is further configured to:

Determining, by the determining module 1420, the time that the first receiving time is forward L _RS , and the L _RS is a time length of the reference signal;

The receiving module 1430 is specifically configured to:

Receiving, at the second receiving moment determined by the determining module 1420, the reference signal sent by the terminal device.

In an implementation, after the base station sends the downlink data to the terminal device, the determining module 1420 may determine the second receiving moment, that is, the receiving moment corresponding to the reference signal. If L _{RS is used to} indicate the length of the reference signal, T ₃ represents the first reception time, and T ₄ represents the second reception time, then T ₄ = T _{3 -} L _RS . In this way, 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.

Optionally, 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:

In the implementation, after the base station sends the downlink data to the terminal device, 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 . After the base station sends the downlink data to the terminal, 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 determining module 1420 is specifically configured to:

The receiving module 1430 is specifically configured to:

In an implementation, after the base station sends the downlink data to the terminal device, 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. After the base station sends the downlink data to the terminal device, 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 determining module 1420 is specifically configured to:

The receiving module 1430 is specifically configured to:

In an implementation, after the base station sends the downlink data to the terminal device, 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. After the base station sends the downlink data to the terminal device, 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. When the time length of the reference signal is 1 symbol, 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. After receiving the reference signal sent by the terminal device, 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.

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. Receiving, at a second receiving moment before the first receiving moment, a reference signal sent by the terminal device, where the reference signal is used by the base station to demodulate the uplink data; at the first receiving moment Receiving uplink data sent by the terminal device, where the uplink data is data carried by an uplink physical channel;

In an implementation, 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. After the base station sends the downlink data carried by the downlink physical channel to the terminal device, 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. 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 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. 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. After transmitting the reference signal to the base station, 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. At the second receiving moment, after receiving the reference signal sent by the terminal device, the base station may be at the first receiving moment. Receiving uplink data sent by the terminal device, where the uplink data 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. Service data and/or control information feedback. The implementation process of the system can be implemented according to the methods described in steps 1201-1206, steps 401-403, and steps 801-803.

A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium mentioned may be read only 1, a magnetic disk or an optical disk or the like.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

A method for transmitting uplink data, the method 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 the uplink data to the base station at the first sending moment, where the uplink data is data carried by an uplink physical channel.
The method according to claim 1, wherein the 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 method according to claim 1 or 2, wherein the terminal device sends a reference signal to the base station at a second transmission time before the first transmission time, including:

Determining, by the terminal device, that the second sending time is a time when 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 method according to any one of claims 1-3, wherein the downlink data is data carried by a physical downlink shared channel PDSCH or downlink semi-persistent scheduling release signaling, and the uplink data is the downlink data. The corresponding hybrid automatic repeat request correctly responds to the HARQ-ACK information;

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 method according to claim 4, wherein the T Delay is 4*L DL , the L DL is a transmission time interval TTI of the downlink data, and the TTI of the downlink data is less than 0.5 milliseconds.
The method according to any one of claims 1 to 3, wherein the downlink data is a high layer command, and the high level command includes signaling for indicating the first sending moment, and the uplink data includes Channel state information CSI.
The method according to any one of claims 1 to 5, wherein the uplink data is data carried by a physical uplink control channel PUCCH, and the TTI of the downlink data 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:

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;

Sending, by the terminal device, a reference signal to the base station at a second sending moment before the first sending moment, including:

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 uplink data carried in the PUCCH to the base station at a time when the receiving time of the downlink data is delayed by 4 symbols.
The method according to any one of claims 1 to 5, wherein the uplink data is data carried by a PUCCH, the TTI of the downlink data is 2 symbols, and the length of the PUCCH is 2 symbols. 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:

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;

Sending, by the terminal device, a reference signal to the base station at a second sending moment before the first sending moment, including:

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 uplink data carried in the PUCCH to the base station at a time when the receiving time of the downlink data is delayed by 8 symbols.
A method for transmitting uplink data, the method 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;

Receiving, by the base station, 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;

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 method according to claim 9, wherein the 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 method according to claim 9 or 10, wherein the receiving, by the base station, the reference signal sent by the terminal device at the second receiving moment before the first receiving moment comprises:

Determining, by the base station, that the second receiving time is a time when the first receiving time is forward L RS , and the L RS is a time length of the reference signal;

Receiving, by the base station, the reference signal sent by the terminal device at the second receiving moment.
The method according to any one of claims 9-11, wherein the downlink data is data carried by a physical downlink shared channel PDSCH or downlink semi-persistent scheduling release signaling, and the uplink data is the downlink data. The corresponding hybrid automatic repeat request correctly responds to the HARQ-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 sending time of the downlink data is delayed by T Delay , and the T Delay is a preset delay interval.
The method according to claim 12, wherein the T Delay is 4*L DL , the L DL is a transmission time interval TTI of the downlink data, and the downlink data has a TTI less than 0.5 milliseconds.
The method according to any one of claims 9 to 11, wherein the downlink data is a high layer command, and the high layer command includes signaling for indicating the first receiving moment, and the uplink data includes Channel state information CSI.
The method according to any one of claims 9 to 13, wherein the uplink data is data carried by a PUCCH, the TTI of the downlink data is 1 symbol, and the length of the PUCCH is 1 symbol. The length of the reference signal is 1 symbol;

Determining, by the base station, the first receiving moment, including:

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:

Receiving, by the base station, the reference signal sent by the terminal device at a time when the transmission time of the downlink data is delayed by 3 symbols;

Receiving, by the base station, the uplink data sent by the terminal device at 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 method according to any one of claims 9 to 13, wherein the uplink data is data carried by a PUCCH, the TTI of the downlink data is 1 symbol, and the length of the PUCCH is 2 symbols. The length of the reference signal is 1 symbol or 2 symbols;

Determining, by the base station, the first receiving moment, including:

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:

Receiving, by the base station, the reference signal sent by the terminal device at a time when the transmission time of the downlink data is delayed by 7 symbols or 6 symbols;

Receiving, by the base station, the uplink data sent by the terminal device at 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 8 symbols.
A terminal device includes a receiver, a processor, and a transmitter, wherein:

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;

The transmitter is configured to send a reference signal to the base station at a second sending moment before the first sending moment that is determined by the processor, where the reference signal is used by the base station to demodulate The uplink data is sent to the base station at the first sending time determined by the processor, where the uplink data is data carried by an uplink physical channel.
The terminal device according to claim 17, wherein the 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 terminal device according to claim 17 or 18, wherein the processor is specifically configured to:

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:

And transmitting, at the second sending moment determined by the processor, the reference signal to the base station.
The terminal device according to any one of claims 17 to 19, wherein the downlink data is data carried by a physical downlink shared channel PDSCH or downlink semi-persistent scheduling release signaling, and the uplink data is the downlink The hybrid automatic repeat request corresponding to the data correctly responds to the HARQ-ACK information;

The processor is specifically configured to:

Determining that 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 terminal device according to claim 20, wherein the T Delay is 4*L DL , the L DL is a transmission time interval TTI of the downlink data, and the TTI of the downlink data is less than 0.5 milliseconds.
The terminal device according to any one of claims 17 to 19, wherein the downlink data is a high layer command, and the high layer command includes signaling for indicating the first sending moment, the uplink data. Includes channel state information CSI.
The terminal device according to any one of claims 17 to 21, wherein the uplink data is data carried by a physical uplink control channel PUCCH, and the TTI of the downlink data is 1 symbol, and the time of the PUCCH The length is 1 symbol, and the length of the reference signal is 1 symbol;

The processor is specifically configured to:

Determining that 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:

And transmitting 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 3 symbols; delaying the receiving time of the downlink data received by the receiver At the time of 4 symbols, the uplink data carried by the PUCCH is transmitted to the base station.
The terminal device according to any one of claims 17 to 21, wherein the uplink data is data carried by a PUCCH, the TTI of the downlink data is 2 symbols, and the length of the PUCCH is 2 a symbol, the reference signal has a length of time of 1 symbol or 2 symbols;

The processor is specifically configured to:

Determining that the first sending moment is a receiving time delay of the downlink data received by the receiver The last 8 symbols of the moment;

The transmitter is specifically configured to:

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, wherein:

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 And adjusting the uplink data, where the uplink data is sent by the terminal device, where the uplink data is data carried by an uplink physical channel.
The base station according to claim 25, wherein 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 the length of time of the uplink physical channel.
The base station according to claim 25 or 26, wherein the processor is specifically configured to:

Determining that the second receiving moment is a time when the first receiving moment determined by the processor is forward L RS , and the L RS is a length of time of the reference signal;

The receiver is specifically configured to:

Receiving, at the second receiving moment, the reference signal sent by the terminal device.
The base station according to any one of claims 25 to 27, wherein the downlink data is data carried by a physical downlink shared channel (PDSCH) or downlink semi-persistent scheduling release signaling, and the uplink data is the downlink data. The corresponding hybrid automatic repeat request correctly responds to the HARQ-ACK information;

The processor is specifically configured to:

Determining that the first receiving time is a time when the sending time of the downlink data sent by the transmitter is delayed by T Delay , and the T Delay is a preset delay interval.
The base station according to claim 28, wherein the T Delay is 4*L DL , the L DL is a transmission time interval TTI of the downlink data, and the TTI of the downlink data is less than 0.5 milliseconds.
The base station according to any one of claims 25-27, wherein the downlink data is a high layer command, and the high layer command includes signaling for indicating the first receiving moment, and the uplink data includes Channel state information CSI.
The base station according to any one of claims 25 to 29, wherein the uplink data is data carried by a PUCCH, the TTI of the downlink data is 1 symbol, and the length of the PUCCH is 1 symbol. The length of the reference signal is 1 symbol;

The processor is specifically configured to:

Determining that 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:

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 base station according to any one of claims 25 to 29, wherein the uplink data is data carried by a PUCCH, the TTI of the downlink data is 1 symbol, and 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:

Determining that 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:

Receiving, at a time when the transmission time of the downlink data sent by the transmitter is delayed by 7 symbols or 6 symbols, receiving the reference signal sent by the terminal device; and the downlink data sent by the transmitter When the transmission time is delayed by 8 symbols, the uplink data carried by the terminal device and carried by the PUCCH is received.
A terminal device, 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 Data: 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 terminal device according to claim 33, wherein 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 the length of time of the uplink physical channel.
The terminal device according to claim 33 or 34, wherein the determining module is further configured to:

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:

And transmitting, by the base station, the reference signal to the base station at the second sending moment determined by the determining module.
The terminal device according to any one of claims 33 to 35, wherein the downlink data is data carried by a physical downlink shared channel (PDSCH) or downlink semi-persistent scheduling release signaling, and the uplink data is the downlink. The hybrid automatic repeat request corresponding to the data correctly responds to the HARQ-ACK information;

The determining module is specifically configured to:

Determining 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 terminal device according to claim 36, wherein the T Delay is 4*L DL , the L DL is a transmission time interval TTI of the downlink data, and the TTI of the downlink data is less than 0.5 milliseconds.
The terminal device according to any one of claims 33 to 35, wherein the downlink data is a high layer command, and the high layer command includes signaling for indicating the first sending moment, the uplink data. Includes channel state information CSI.
The terminal device according to any one of claims 33 to 37, wherein the uplink data is data carried by a physical uplink control channel PUCCH, and the TTI of the downlink data is 1 symbol, and the time of the PUCCH The length is 1 symbol, and the length of the reference signal is 1 symbol;

The determining module is specifically configured to:

Determining that 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:

Transmitting the reference signal to the base station at a time when the receiving time of the downlink data is delayed by 3 symbols, and transmitting the bearer to the PUCCH to the base station at a time when the receiving time of the downlink data is delayed by 4 symbols Upstream data.
The terminal device according to any one of claims 33 to 37, wherein the uplink data is data carried by a PUCCH, the TTI of the downlink data is 2 symbols, and the length of the PUCCH is 2 a symbol, the reference signal has a length of time of 1 symbol or 2 symbols;

The determining module is specifically configured to:

Determining that 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:

Transmitting 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; and when the receiving time of the downlink data is delayed by 8 symbols, to the base station The uplink data carried on the PUCCH is transmitted.
A base station, 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 And the uplink data is received by the terminal device, where the uplink data is data carried by an uplink physical channel, where the first receiving time is determined by the determining module.
The base station according to claim 41, wherein the 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 base station according to claim 41 or 42, wherein the determining module is further configured to:

Determining that 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:

And receiving, at the second receiving moment determined by the determining module, the reference signal sent by the terminal device.
The base station according to any one of claims 41 to 43 wherein the downlink data is data carried by a physical downlink shared channel (PDSCH) or downlink semi-persistent scheduling release signaling, and the uplink data is the downlink data. The corresponding hybrid automatic repeat request correctly responds to the HARQ-ACK information;

The determining module is specifically configured to:

Determining 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 base station according to claim 44, wherein the T Delay is 4*L DL , the L DL is a transmission time interval TTI of the downlink data, and the downlink data has a TTI less than 0.5 milliseconds.
The base station according to any one of claims 41 to 43 wherein the downlink data is a high layer command, and the high layer command includes signaling for indicating the first receiving moment, and the uplink data includes Channel state information CSI.
The base station according to any one of claims 41 to 45, wherein the uplink data is data carried by a PUCCH, the TTI of the downlink data is 1 symbol, and the length of the PUCCH is 1 symbol. The length of the reference signal is 1 symbol;

The determining module is specifically configured to:

Determining that 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:

Receiving, by the terminal device, the reference signal sent by the terminal device at a time when the transmission time of the downlink data is delayed by 3 symbols; receiving the terminal device to send when the transmission time of the downlink data is delayed by 4 symbols Uplink data carried on the PUCCH.
The base station according to any one of claims 41 to 45, wherein the uplink data is data carried by a PUCCH, the TTI of the downlink data is 1 symbol, and the length of the PUCCH is 2 symbols. The length of the reference signal is 1 symbol or 2 symbols;

The determining module is specifically configured to:

Determining that 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:

Receiving, at a time when the transmission time of the downlink data is delayed by 7 symbols or 6 symbols, receiving the reference signal sent by the terminal device; at a time when the transmission time of the downlink data is delayed by 8 symbols, the receiving station The uplink data carried by the terminal device and carried by the PUCCH.
A system for transmitting uplink data, characterized in that the system comprises 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 that the base station receives uplink data that is sent by the terminal device and that is corresponding to the downlink data. Receiving a reference signal transmitted by the terminal device at a second receiving moment before the first receiving moment, wherein the reference signal is used by the base station to demodulate the uplink data; Receiving, by the terminal device, the uplink data sent by the terminal device, where the uplink data is data carried by an uplink physical channel;

The terminal device is configured to receive downlink data sent by the base station, and determine a first sending time according to the downlink data, where the first sending time is sent by the terminal device to the base station and the downlink a time of uplink data corresponding to the data; transmitting a reference signal to the base station at a second transmission time before the first transmission time; and transmitting the uplink data to the base station at the first transmission time.