WO2020063777A1 - 传输数据的方法和装置 - Google Patents
传输数据的方法和装置 Download PDFInfo
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- WO2020063777A1 WO2020063777A1 PCT/CN2019/108251 CN2019108251W WO2020063777A1 WO 2020063777 A1 WO2020063777 A1 WO 2020063777A1 CN 2019108251 W CN2019108251 W CN 2019108251W WO 2020063777 A1 WO2020063777 A1 WO 2020063777A1
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- uplink data
- transmission power
- power
- precoding matrix
- equal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/365—Power headroom reporting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
- H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
- H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
- H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
- H04L27/2078—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the phase change per symbol period is constrained
- H04L27/2082—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the phase change per symbol period is constrained for offset or staggered quadrature phase shift keying
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
- H04L27/2636—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/08—Closed loop power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/262—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account adaptive modulation and coding [AMC] scheme
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
Definitions
- the present application relates to the field of communications, and more particularly, to a method and device for transmitting data in the field of communications.
- p t the actual transmit power used by the terminal device to send uplink data
- P p the terminal device ’s transmit power.
- Channel transmission power of uplink data N is the number of non-zero power antenna ports used to send the uplink data, and M is the number of antenna ports configured or predefined by the network device for sending the uplink data.
- the present application provides a method and device for transmitting data, which can effectively improve the reliability of data transmission.
- a method for transmitting data includes:
- the terminal device determines a channel transmission power of the first uplink data
- the terminal device Determining, by the terminal device, the actual transmission power of the first uplink data according to the channel transmission power and transmission parameters, where the actual transmission power is less than or equal to the channel transmission power, wherein the transmission parameters include one of the following or Multiple:
- Power headroom indicates a difference between the maximum transmission power allowed by the terminal device and the transmission power of the channel, and the channel transmission power is less than or equal to the maximum transmission power allowed by the terminal device, or,
- a waveform used for sending the first uplink data or
- a downlink control information DCI format for scheduling the first uplink data or
- the modulation and coding scheme MCS used for sending the first uplink data or
- the terminal device uses the actual transmission power to send the first uplink data.
- the method for transmitting data determines the actual transmission power of the uplink data based on the channel transmission power and various transmission parameters that can indicate whether the terminal device is at the cell edge, and can flexibly adjust the actual transmission power of the uplink data. Improve the reliability of data transmission.
- N is less than M
- M is the number of antenna ports configured by the network device to send the first uplink data
- N is the number of M antenna ports used to send the first uplink data.
- the number of non-zero power antenna ports, N is an integer greater than or equal to 1
- M is an integer greater than 1.
- the method for transmitting data provided in the embodiment of the present application is more effective in determining the actual transmission power of uplink data based on the channel transmission power and various transmission parameters that can indicate whether the terminal device is at the cell edge when N is less than M It can flexibly adjust the actual transmission power of uplink data to improve data transmission reliability.
- the transmission parameter includes the power headroom
- the power headroom satisfies a first condition, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power.
- the first condition is used to determine that the terminal device is at a cell edge.
- the terminal device at the cell edge can use a larger The transmission power sends uplink data, which improves the reliability of data transmission.
- the actual transmission power p t (N / M) ⁇ p p .
- the uplink data is transmitted using the scaled channel transmission power.
- the terminal equipment it is beneficial to reduce the interference caused by data transmission, and it is also conducive to reducing the power consumption of the terminal equipment.
- the first condition is that the power headroom is greater than or equal to a first threshold
- the first threshold is equal to 6 dBm; or
- the first threshold is equal to 3 dBm; or
- the first threshold is equal to 3 dBm.
- the actual transmission power p t (N / M) ⁇ p p .
- the first condition is that the power headroom is greater than or equal to a first threshold
- the first threshold is equal to 6dB; or,
- the first threshold is equal to 3 dB; or
- the first threshold is equal to 3dB.
- the transmission parameter includes a waveform used for sending the first uplink data
- the waveform is a discrete Fourier transform extended orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power .
- the terminal device at the cell edge can use a larger actual situation by increasing the actual transmission power.
- the transmission power sends uplink data, which improves the reliability of data transmission.
- CP-OFDM orthogonal frequency division multiplexing
- the transmission parameter includes a downlink control information DCI format used for sending the first uplink data
- the DCI format is a first DCI format, the actual transmission power p t > (N / M) ⁇ p p , and the first DCI format is a plurality of DCI formats used for scheduling uplink data with a minimum number of bits.
- DCI format, p p is the transmission power of the channel.
- the DCI format capable of characterizing the position of the terminal device is a DCI format with a minimum number of bits included in multiple DCI formats for scheduling uplink data
- the actual transmission power is improved.
- the terminal equipment at the cell edge can use a larger actual transmission power to send uplink data, which improves the reliability of data transmission.
- the DCI format is a second DCI format
- the actual transmission power p t (N / M) ⁇ p p
- the second DCI format is multiple for scheduling uplink data.
- the DCI format capable of characterizing the position of the terminal device is the second DCI format
- using the scaled channel transmission power to send uplink data is beneficial to the terminal devices located at the edge of the cell that is not conducive to data transmission. Interference at the same time, it is conducive to reducing power consumption of terminal equipment.
- the transmission parameter includes the modulation and coding scheme MCS used for sending the first uplink data
- the modulation method of the MCS is binary phase shift keying BPSK or quadrature phase shift keying QPSK, then the actual transmit power p t > (N / M) ⁇ p p , where p p is the channel transmit power.
- the terminal device at the cell edge can use a larger actual The transmission power sends uplink data, which improves the reliability of data transmission.
- the MCS modulation mode is a 16 quadrature amplitude modulation QAM or 64QAM and a higher-order modulation mode, and the actual transmission power p t > (N / M) ⁇ p p .
- the modulation method of the MCS capable of characterizing the position of the terminal device is 16 quadrature amplitude modulation QAM or 64QAM and a higher-order modulation method
- uplink data is transmitted by using the scaled channel transmission power.
- the terminal equipment it is beneficial to reduce the interference caused by data transmission, and it is also conducive to reducing the power consumption of the terminal equipment.
- the transmission parameter includes the power adjustment value used to send the first uplink data
- the power adjustment value obtained by the terminal device K times satisfies the second condition, the actual transmission power p t > (N / M) ⁇ p p , where p p is the transmission power of the channel, and K is greater than or equal to 1. Integer.
- the second condition is used to determine that the terminal device is at a cell edge.
- the terminal device at the cell edge is improved by increasing the actual transmission power
- the uplink data can be sent with a larger actual transmission power, which improves the reliability of data transmission.
- the second condition is that a power adjustment value obtained by the terminal device K times is greater than or equal to a second threshold, and the second threshold is equal to 3 dB or 3 dBm.
- the second condition is specifically that the power adjustment value obtained by the terminal device for consecutive K times is equal to the second threshold, the second threshold is equal to 3dB or 3dBm, and K is greater than An integer of 1.
- the uplink channel data is sent using the scaled channel transmission power. It is beneficial to reduce the interference caused by data transmission, and it is also beneficial to the terminal equipment to reduce power consumption.
- the actual transmission power is equal to the channel transmission power.
- the reliability of data transmission can be improved to the greatest extent.
- the method further includes:
- the terminal equipment evenly distributes the actual transmission power to the N antenna ports used to send the first uplink data.
- a method for transmitting data includes:
- the terminal device determines a channel transmission power of the first uplink data
- the terminal device Determining, by the terminal device, the actual transmission power of the first uplink data according to the channel transmission power and transmission parameters, where the actual transmission power is less than or equal to the channel transmission power, wherein the transmission parameters include one of the following or Multiple:
- Power headroom indicates a difference between the maximum transmission power allowed by the terminal device and the transmission power of the channel, and the channel transmission power is less than or equal to the maximum transmission power allowed by the terminal device, or,
- a waveform used for sending the first uplink data or
- a downlink control information DCI format for scheduling the first uplink data or
- the modulation and coding scheme MCS used for sending the first uplink data or
- the terminal device uses the actual transmission power to send the first uplink data.
- the method for transmitting data determines the actual transmission power of the uplink data based on the channel transmission power and various transmission parameters that can indicate whether the terminal device is at the cell edge, and can flexibly adjust the actual transmission power of the uplink data. Improve the reliability of data transmission.
- N is less than M
- M is the number of antenna ports configured by the network device to send the first uplink data
- N is the number of M antenna ports used to send the first uplink data.
- the number of non-zero power antenna ports, N is an integer greater than or equal to 1
- M is an integer greater than 1.
- the transmission parameter includes the power headroom
- the determining, by the terminal device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data includes:
- the terminal device determines an actual transmission power of the first uplink data.
- the first condition is that the power headroom is greater than or equal to a first threshold
- the first threshold value meets at least one of the following:
- the first threshold is equal to 6 dBm; or
- the first threshold is equal to 3 dBm; or
- the first threshold is equal to 3 dBm.
- the transmission parameter includes a waveform used for sending the first uplink data
- the determining, by the terminal device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data includes:
- the waveform is a discrete Fourier transform extended orthogonal frequency division multiplex multiple access DFT-s-OFDM waveform
- the terminal device determines an actual transmission power of the first uplink data.
- the transmission parameter includes a downlink control information DCI format used for sending the first uplink data
- the determining, by the terminal device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data includes:
- the DCI format is a first DCI format
- the first DCI format is a DCI format with a minimum number of bits included in multiple DCI formats for scheduling uplink data
- the terminal device determines an actual transmission power of the first uplink data.
- the transmission parameter includes the modulation and coding scheme MCS used for sending the first uplink data
- the determining, by the terminal device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data includes:
- the MCS modulation mode is binary phase shift keying BPSK or quadrature phase shift keying QPSK
- the terminal device determines an actual transmission power of the first uplink data.
- the transmission parameter includes a power adjustment value used for sending the first uplink data
- the determining, by the terminal device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data includes:
- the terminal device determines an actual transmission power of the first uplink data.
- the second condition is that a power adjustment value obtained by the terminal device K times is greater than or equal to a second threshold, and the second threshold is equal to 3 dBm.
- the second condition is specifically that a power adjustment value obtained by the terminal device for consecutive K times is equal to the second threshold, and K is an integer greater than 1.
- the actual transmit power p t > (N / M) ⁇ p p
- p p is the channel transmit power
- the actual transmission power is equal to the channel transmission power.
- N 2
- the method further includes:
- the terminal equipment evenly distributes the actual transmission power to the N antenna ports used to send the first uplink data.
- a method for transmitting information includes:
- the terminal device receives indication information, where the indication information is used to indicate a first precoding matrix used for sending the first uplink data, and the first precoding matrix belongs to a first precoding matrix subset or a first A subset of two precoding matrices, where
- the transmit power of the uplink data determined based on each of the one or more precoding matrices in the first precoding matrix subset satisfies the following condition: the transmit power of one antenna port among the antenna ports used to send the uplink data p 0 > (1 / M) ⁇ p p , and the number of antenna ports used for sending uplink data is greater than or equal to 1 and less than M, based on one or more precodings in the second precoding matrix subset
- M is the number of antenna ports configured by the network device to send the first uplink data, M is an integer greater than 1, and p p is a channel transmission power of the uplink data;
- the terminal device uses the actual transmission power to send the first uplink data.
- a first precoding subset and a second precoding subset are set in a precoding set, where it is determined based on any one precoding matrix in the first precoding matrix subset.
- the transmit power determined based on each precoding matrix in one or more precoding matrices in the first precoding matrix subset specifically meets the following conditions:
- the actual transmission power determined based on each of the one or more precoding matrices in the first precoding matrix subset is equal to the channel transmission power.
- each precoding matrix in the precoding matrix set includes a phase and amplitude quantization value, where the amplitude quantization value is used to determine transmission power of uplink data, where:
- a phase of each precoding matrix in one or more precoding matrices in the first precoding matrix subset belongs to a phase of a precoding matrix included in the second precoding matrix subset.
- the number of occupied bits is determined based on the number of precoding matrices included in the precoding matrix set. For example, if the number of bits is N, the number of N bits can be Indicates 2 n precoding matrices, however, there may be some bit values remaining in practice. Since the phase of the precoding matrix in the first precoding matrix subset belongs to the phase of the precoding matrix in the second precoding subset, it means that the number of the first precoding subset is small.
- the coding matrix can be indicated by the remaining bit values in the precoding matrix set. Without changing the existing number of bits and without affecting the flexibility of the existing codeword selection, the reserved field is used to indicate the pre-adjusted amplitude quantization value. Encoding matrix.
- each precoding matrix in the precoding matrix set is composed of a phase and amplitude quantization value, and the amplitude quantization value is used to determine transmission power of uplink data, where the first
- Each precoding matrix in the precoding matrix subset satisfies the following conditions:
- the number of antenna ports used for sending uplink data is equal to 1, and the amplitude quantization value of each precoding matrix in the first precoding matrix subset is 1,
- the number of antenna ports used for sending uplink data is equal to two, and the amplitude quantization value of each precoding matrix in the first precoding matrix subset is
- the precoding matrix in the set of precoding matrices is a precoding matrix corresponding to all the number of transmission layers whose transmission layer number is less than or equal to L for sending uplink data, and one transmission layer number corresponds to One or more pre-programmed matrices, L is the maximum number of transmission layers that the terminal device can support, L is an integer greater than or equal to 1, and the pre-coding matrix in the first pre-coding matrix subset corresponds to one number of transmission layers.
- a method for transmitting data which is characterized in that:
- the network device determines a channel transmit power of the first uplink data
- the network device Determining, by the network device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data, where the actual transmission power is less than or equal to the channel transmission power, wherein the transmission parameters include one of the following or Multiple:
- Power headroom indicates a difference between the maximum transmission power allowed by the terminal device and the transmission power of the channel, and the channel transmission power is less than or equal to the maximum transmission power allowed by the terminal device, or,
- a waveform used for sending the first uplink data or
- a downlink control information DCI format used for scheduling the first uplink data or
- the modulation and coding scheme MCS used for sending the first uplink data or
- the method for transmitting data determines the actual transmission power of the uplink data based on the channel transmission power and various transmission parameters that can indicate whether the terminal device is at the cell edge, and can flexibly adjust the actual transmission power of the uplink data. Improve the reliability of data transmission. At the same time, it is convenient for network equipment scheduling and system optimization.
- N is less than M
- M is the number of antenna ports configured for sending the first uplink data by the network device
- N is the first uplink data sent from M antenna ports.
- the number of non-zero power antenna ports used, N is an integer greater than or equal to 1, and M is an integer greater than 1.
- the method for transmitting data provided in the embodiment of the present application is more effective in determining the actual transmission power of uplink data based on the channel transmission power and various transmission parameters that can indicate whether the terminal device is at the cell edge when N is less than M. It can flexibly adjust the actual transmission power of uplink data to improve data transmission reliability. At the same time, it is convenient for network equipment scheduling and system optimization.
- the transmission parameter includes the power headroom
- the power headroom satisfies a first condition, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power.
- the first condition is used to determine that the terminal device is at a cell edge.
- the terminal device at the cell edge can use a larger The transmission power sends uplink data, which improves the reliability of data transmission.
- the actual transmission power p t (N / M) ⁇ p p .
- the first condition is that the power headroom is greater than or equal to a first threshold
- the first threshold is equal to 6 dBm; or
- the first threshold is equal to 3 dBm; or
- the first threshold is equal to 3 dBm.
- the transmission parameter includes a waveform used for sending the first uplink data
- the waveform is a discrete Fourier transform extended orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power .
- the terminal device at the cell edge can use a larger actual situation by increasing the actual transmission power.
- the transmission power sends uplink data, which improves the reliability of data transmission.
- it is convenient for network equipment scheduling and system optimization.
- the waveform is a CP-OFDM waveform
- the actual transmission power p t (N / M) ⁇ p p .
- the transmission parameter includes a downlink control information DCI format used for sending the first uplink data
- the DCI format is a first DCI format, the actual transmission power p t > (N / M) ⁇ p p , and the first DCI format is a plurality of DCI formats used for scheduling uplink data with a minimum number of bits.
- DCI format, p p is the transmission power of the channel.
- the DCI format capable of characterizing the position of the terminal device is a DCI format with a minimum number of bits included in multiple DCI formats for scheduling uplink data
- the actual transmission power is improved.
- the terminal equipment at the cell edge can use a larger actual transmission power to send uplink data, which improves the reliability of data transmission.
- the DCI format is a second DCI format
- the actual transmission power p t (N / M) ⁇ p p
- the second DCI format is multiple for scheduling uplink data.
- the transmission parameter includes the modulation and coding scheme MCS used for sending the first uplink data
- the modulation method of the MCS is binary phase shift keying BPSK or quadrature phase shift keying QPSK, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power.
- the modulation method of the MCS capable of characterizing the position of the terminal device is BPSK or QPSK
- the terminal device at the cell edge can use a larger actual The transmission power sends uplink data, which improves the reliability of data transmission.
- the transmission parameter includes a power adjustment value used for sending the first uplink data
- the power adjustment value obtained by the terminal device K times satisfies the second condition, the actual transmission power p t > (N / M) ⁇ p p , where p p is the transmission power of the channel, and K is greater than or equal to 1. Integer.
- the second condition is used to determine that the terminal device is at a cell edge.
- the terminal device at the cell edge is improved by increasing the actual transmission power
- the uplink data can be sent with a larger actual transmission power, which improves the reliability of data transmission.
- the second condition is that a power adjustment value obtained by the terminal device K times is greater than or equal to a second threshold, and the second threshold is equal to 3 dBm.
- the second condition is specifically that power adjustment values obtained by the terminal device for consecutive K times are all equal to the second threshold, and K is an integer greater than 1.
- the actual transmission power is equal to the channel transmission power.
- the reliability of data transmission can be improved to the greatest extent.
- a method for transmitting data includes:
- the network device determines a channel transmit power of the first uplink data
- the network device Determining, by the network device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data, where the actual transmission power is less than or equal to the channel transmission power, wherein the transmission parameters include one of the following or Multiple:
- Power headroom indicates a difference between the maximum transmission power allowed by the terminal device and the transmission power of the channel, and the channel transmission power is less than or equal to the maximum transmission power allowed by the terminal device, or,
- a waveform used for sending the first uplink data or
- a downlink control information DCI format for scheduling the first uplink data or
- the modulation and coding scheme MCS used for sending the first uplink data or
- the terminal device uses the actual transmission power to send the first uplink data.
- the method for transmitting data determines the actual transmission power of the uplink data based on the channel transmission power and various transmission parameters that can indicate whether the terminal device is at the cell edge, and can flexibly adjust the actual transmission power of the uplink data. Improve the reliability of data transmission.
- N is less than M
- M is the number of antenna ports configured for sending the first uplink data by the network device
- N is the first uplink data sent from M antenna ports.
- the number of non-zero power antenna ports used, N is an integer greater than or equal to 1, and M is an integer greater than 1.
- the transmission parameter includes the power headroom
- the determining, by the network device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data includes:
- the network device determines an actual transmission power of the first uplink data.
- the first condition is that the power headroom is greater than or equal to a first threshold
- the first threshold value meets at least one of the following:
- the first threshold is equal to 6 dBm; or
- the first threshold is equal to 3 dBm; or
- the first threshold is equal to 3 dBm.
- the transmission parameter includes a waveform used for sending the first uplink data
- the determining, by the network device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data includes:
- the waveform is a discrete Fourier transform extended orthogonal frequency division multiplex multiple access DFT-s-OFDM waveform
- the network device determines an actual transmission power of the first uplink data.
- the transmission parameter includes a downlink control information DCI format used for sending the first uplink data
- the determining, by the network device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data includes:
- the DCI format is a first DCI format
- the first DCI format is a DCI format with a minimum number of bits included in multiple DCI formats for scheduling uplink data
- the network device determines an actual transmission power of the first uplink data.
- the transmission parameter includes the modulation and coding scheme MCS used for sending the first uplink data
- the determining, by the network device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data includes:
- the MCS modulation mode is binary phase shift keying BPSK or quadrature phase shift keying QPSK
- the network device determines an actual transmission power of the first uplink data.
- the transmission parameter includes a power adjustment value used for sending the first uplink data
- the determining, by the network device according to the channel transmission power and transmission parameters, the actual transmission power of the first uplink data includes:
- the network device determines an actual transmission power of the first uplink data.
- the second condition is that a power adjustment value obtained by the terminal device K times is greater than or equal to a second threshold, and the second threshold is equal to 3 dBm.
- the second condition is specifically that a power adjustment value obtained by the terminal device for consecutive K times is equal to the second threshold, and K is an integer greater than 1.
- the actual transmit power p t > (N / M) ⁇ p p
- p p is the channel transmit power
- the actual transmission power is equal to the channel transmission power.
- N 2
- a method for transmitting data includes:
- the network device determines a first precoding matrix for precoding the first uplink data, where the first precoding matrix belongs to the first precoding matrix subset or the second precoding matrix subset in the precoding matrix set, where:
- the transmit power of the uplink data determined based on each of the one or more precoding matrices in the first precoding matrix subset satisfies the following condition: the transmit power of one antenna port among the antenna ports used to send the uplink data p 0 > (1 / M) ⁇ p p , and the number of antenna ports used for sending uplink data is greater than or equal to 1 and less than M, based on one or more precodings in the second precoding matrix subset
- the number of antenna ports configured to send the first uplink data, M is an integer greater than 1
- p p is a channel transmission power of the uplink data;
- a first precoding subset and a second precoding subset are set in a precoding set, where it is determined based on any one precoding matrix in the first precoding matrix subset.
- the transmit power determined based on each precoding matrix in one or more precoding matrices in the first precoding matrix subset specifically meets the following conditions:
- the actual transmission power determined based on each of the one or more precoding matrices in the first precoding matrix subset is equal to the channel transmission power.
- each precoding matrix in the precoding matrix set includes a phase and amplitude quantization value, where the amplitude quantization value is used to determine transmission power of uplink data, where:
- a phase of each precoding matrix in one or more precoding matrices in the first precoding matrix subset belongs to a phase of a precoding matrix included in the second precoding matrix subset.
- the number of occupied bits is determined based on the number of precoding matrices included in the precoding matrix set. For example, if the number of bits is N, the number of N bits can be Indicates 2 n precoding matrices, however, there may be some bit values remaining in practice. Since the phase of the precoding matrix in the first precoding matrix subset belongs to the phase of the precoding matrix in the second precoding subset, it means that the number of the first precoding subset is small.
- the coding matrix can be indicated by the remaining bit values in the precoding matrix set. Without changing the existing number of bits and without affecting the flexibility of the existing codeword selection, the reserved field is used to indicate the pre-adjusted amplitude quantization value. Encoding matrix.
- an apparatus for transmitting data may be configured to perform operations of the terminal device in the first aspect to the second aspect and any possible implementation manners thereof.
- the apparatus may include a module unit for performing each operation of the terminal device in any possible implementation manner of the first aspect to the third aspect.
- an apparatus for transmitting data may be used to perform operations of the network device in the third to fourth aspects and any possible implementation manners thereof.
- the apparatus may include a module unit for performing each operation of the network device in any possible implementation manner of the fourth aspect to the sixth aspect.
- a terminal device includes a processor, a transceiver, and a memory.
- the processor, the transceiver, and the memory communicate with each other through an internal connection path.
- the memory is configured to store instructions
- the processor is configured to execute instructions stored in the memory.
- the execution causes the terminal device to execute any one of the methods in any possible implementation manner of the first aspect to the third aspect, or the execution causes the terminal.
- the device implements the apparatus provided by the seventh aspect.
- a network device includes a processor, a transceiver, and a memory.
- the processor, the transceiver, and the memory communicate with each other through an internal connection path.
- the memory is configured to store instructions
- the processor is configured to execute instructions stored in the memory.
- the execution causes the network device to execute any one of the methods in any of the possible implementation manners of the fourth aspect to the sixth aspect, or the execution causes the network
- the device implements the apparatus provided by the eighth aspect.
- a chip system including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the chip system is installed
- the communication device executes any one of the above-mentioned first to sixth aspects and possible implementations thereof.
- a computer program product includes: computer program code, where the computer program code is received by a communication unit, a processing unit, or a transceiver of a communication device (for example, a network device or a terminal device).
- a communication device for example, a network device or a terminal device.
- the communication device is caused to execute any one of the foregoing first aspect to the sixth aspect and the possible implementation methods thereof.
- a computer-readable storage medium stores a program that causes a communication device (for example, a network device or a terminal device) to execute the first to sixth aspects. And any of its possible implementations.
- a computer program is provided.
- the computer program When the computer program is executed on a computer, the computer will enable the computer to implement any one of the foregoing first to sixth aspects and possible implementations thereof. .
- FIG. 1 is a schematic diagram of a communication system used in an embodiment of the present application.
- FIG. 2 is a schematic interaction diagram of a data transmission method according to an embodiment of the present application.
- FIG. 3 is another schematic interaction diagram of a data transmission method according to an embodiment of the present application.
- FIG. 4 is another schematic interaction diagram of a data transmission method according to an embodiment of the present application.
- 5 to 8 are schematic block diagrams of an apparatus for transmitting data according to an embodiment of the present application.
- GSM global mobile communication
- CDMA code division multiple access
- WCDMA broadband code division multiple access
- GPRS general packet radio service
- LTE long term evolution
- FDD frequency division duplex
- TDD Time Division Duplex
- UMTS Universal Mobile Telecommunications System
- WiMAX Worldwide Interoperability for Microwave Access
- the terminal device in the embodiments of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or User device.
- Terminal equipment can also be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and wireless communications Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or public land mobile network (PLMN) in future evolution Terminal equipment and the like are not limited in this embodiment of the present application.
- SIP session initiation protocol
- WLL wireless local loop
- PDAs personal digital assistants
- PLMN public land mobile network
- the network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a Global System for Mobile Communication (GSM) system or a Code Division Multiple Access (CDMA) system.
- the base station (Base Transceiver Station (BTS)) can also be a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved base station (evolved) in an LTE system.
- GSM Global System for Mobile Communication
- CDMA Code Division Multiple Access
- the base station can also be a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved base station (evolved) in an LTE system.
- NodeB, NB base station
- WCDMA wideband code division multiple access
- evolved evolved base station
- NodeB can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, access point, in-vehicle device, wearable device, and future
- CRAN cloud radio access network
- the network equipment in the 5G network or the network equipment in the future evolved PLMN network is not limited in the embodiments of the present application.
- the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
- This hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory).
- the operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system.
- This application layer contains applications such as browsers, address books, word processing software, and instant messaging software.
- the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the application can be run to provide the program according to the embodiment of the application.
- the communication may be performed by using the method described above.
- the method execution subject provided in the embodiments of the present application may be a terminal device or a network device, or a function module in the terminal device or the network device that can call a program and execute the program.
- next-generation mobile communication system makes it possible for future mobile data traffic growth, massive Internet of Things, and diversified new services and application scenarios.
- the new 5G radio (NR) the foundation of the new generation cellular network, is also expected to raise the network's data speed, capacity, delay, reliability, efficiency and coverage to a whole new level. Will make full use of the available spectrum resources for each bit.
- 5G based on orthogonal frequency division multiplexing (OFDM) new air interface design will become a global standard, supporting 5G equipment, diversified deployments, and covering diverse spectrum (including low-frequency and high-frequency Coverage), but also support a variety of services and terminals.
- OFDM orthogonal frequency division multiplexing
- MIMO multiple-input multiple-output
- MIMO technology refers to the use of multiple transmitting antennas and receiving antennas in the transmitting device and the receiving device, respectively, so that signals are transmitted and received through multiple antennas of the transmitting device and the receiving device, thereby improving communication quality. It can make full use of space resources, realize multiple transmissions and multiple receptions through multiple antennas, and can increase the channel capacity of the system multiple times without increasing spectrum resources and antenna transmit power.
- the transmitting device performs a bit mapping process on the data bits that need to be sent to the receiving device to obtain a modulation symbol.
- the modulation symbol is mapped to multiple transmission layers through layer mapping.
- the modulation symbols after layer mapping are precoded to obtain a precoded signal.
- the pre-encoded signal is mapped to multiple REs after being mapped with resource elements (REs). These REs are then modulated by orthogonal frequency division multiplexing (OFDM) and transmitted through an antenna port.
- OFDM orthogonal frequency division multiplexing
- each transmission layer may correspond to one or more antenna ports.
- the antenna port referred to here can be understood as a logical port used for transmission, and there is no one-to-one correspondence with the port of the physical antenna.
- the antenna port can be composed of pilot signals (for example, DMRS (Demodulation Reference Signal (DMRS)).
- DMRS Demodulation Reference Signal
- one DMRS corresponds to one antenna port.
- FIG. 1 is a schematic diagram of a communication system used in an embodiment of the present application.
- the communication system 100 includes a network device 102, and the network device 102 may include multiple antenna groups.
- Each antenna group may include one or more antennas, for example, one antenna group may include antennas 104 and 106, another antenna group may include antennas 108 and 110, and additional groups may include antennas 112 and 114. 2 antennas are shown in FIG. 1 for each antenna group, however, more or fewer antennas may be used for each group.
- the network device 102 may additionally include a transmitter chain and a receiver chain. Those of ordinary skill in the art may understand that each of them may include multiple components related to signal transmission and reception, such as a processor, a modulator, a multiplexer, and a decoder. Tuner, demultiplexer, or antenna.
- the network device 102 may communicate with multiple terminal devices, for example, the network device 102 may communicate with the terminal device 116 and the terminal device 122. However, it is understood that the network device 102 may communicate with any number of terminal devices similar to the terminal devices 116 or 122.
- the terminal devices 116 and 122 may be, for example, cellular phones, smartphones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and / or any other suitable for communicating on the wireless communication system 100 device.
- the terminal device 116 communicates with the antennas 112 and 114, where the antennas 112 and 114 send information to the terminal device 116 through the forward link 118 and receive information from the terminal device 116 through the reverse link 120.
- the terminal device 122 communicates with the antennas 104 and 106, where the antennas 104 and 106 send information to the terminal device 122 through the forward link 124 and receive information from the terminal device 122 through the reverse link 126.
- forward link 118 may utilize a different frequency band from that used by reverse link 120
- forward link 124 may utilize a different frequency band from that used by reverse link 126 .
- the forward link 118 and the reverse link 120 may use a common frequency band
- the forward link 124 and the reverse link 126 may use a common frequency band. frequency band.
- Each set of antennas and / or areas designed for communication is referred to as a sector of the network device 102.
- the antenna group may be designed to communicate with terminal devices in a sector covered by the network device 102.
- the transmitting antennas of the network device 102 can use beamforming to improve the signal-to-noise ratio of the forward links 118 and 124.
- the Mobile devices experience less interference.
- the network device 102, the terminal device 116, or the terminal device 122 may be a wireless communication transmitting apparatus and / or a wireless communication receiving apparatus.
- the wireless communication transmitting device may encode the data for transmission.
- the wireless communication transmitting device may acquire a certain number of data bits to be transmitted to the wireless communication receiving device through a channel.
- the wireless communication transmitting device may generate, receive from other communication devices, or save in a memory, etc., to be transmitted through the channel.
- Such data bits may be contained in a transport block or multiple transport blocks of data, which may be segmented to generate multiple code blocks.
- the communication system 100 may be a public land mobile network, a PLMN network, a device-to-device (D2D) network, a machine-to-machine (M2M) network, or another network.
- FIG. 1 is only an example for easy understanding. Simplified schematic diagram, the network can also include other network equipment, not shown in Figure 1.
- Antenna port configured by the network device for sending uplink data
- the network device can configure the number of antenna ports through the configuration information.
- the configuration information may be implicitly notified by configuring the number of ports of sounding reference signal (SRS) resources, that is, if the number of ports of the SRS resource is configured as 4, it means that the number of antenna ports used to transmit the uplink data is 4, If the network device is configured with multiple SRS resources and the number of ports of the multiple SRS resources is different, the number of antenna ports is determined according to one SRS resource indicated by the SRI field in the DCI scheduling the uplink data, or according to all configured SRSs The total number of ports of the resource determines the number of antenna ports.
- the configuration information also implicitly indicates the dimension of the precoding matrix indicated by the precoding matrix indication field in the DCI scheduling uplink data.
- M is used to indicate the number of antenna ports configured by the network device for sending uplink data.
- the antenna ports mentioned in the context are all antenna ports used by the terminal device to send uplink data.
- Antenna port used to send uplink data
- Non-zero power antenna port used by the terminal device to send uplink data.
- the number of non-zero power antenna ports is less than or equal to M.
- N is used to indicate the number of non-zero power antenna ports used for sending uplink data among the M antenna ports.
- the terminal device may determine N by using a transmission precoding matrix indication field in the DCI scheduling the uplink data.
- the transmission precoding matrix indication field may be used to indicate that some antenna ports or all antenna ports are selected for uplink transmission, that is, N is less than or equal to M.
- the number M of antenna ports configured by the network device for sending uplink data is 4, and when sending uplink data, the number N of antenna ports used may be any number less than or equal to 4.
- the value of M may be configured to the terminal device by some fields, such as nrofSRS-Ports.
- the value of N may also be configured to the terminal device by certain fields, such as Precoding, Information, and Number of Layers.
- the maximum transmission power indicates the maximum capability of the power used by the terminal device to send uplink data, or the maximum transmission power that the terminal device can support.
- the maximum transmission power may be the transmission power configured by the network device to the terminal device, and indicates the maximum transmission power that the network device allows the terminal device to use.
- the maximum transmission power may also be the maximum transmission power that the network device agrees that the terminal device can adopt.
- p max is used to indicate the maximum transmission power.
- the channel status will be different in different time periods.
- the channel quality is poor and requires a larger transmission power to send data.
- the channel quality is good, and the lower transmission power can be used to send data.
- the uplink transmission in different periods
- the size of the occupied frequency domain resources is different.
- the larger the frequency domain resource the larger the transmission power required to send the uplink data, and the smaller the frequency domain resource, the smaller the transmission power is required to transmit the uplink data. Therefore, in uplink transmission, the transmission power determined based on factors such as channel state and frequency domain resource allocation is different.
- the network device determines the configuration parameter of the transmission power according to the channel status and the scheduling policy indication.
- the terminal device may call the transmission power determined based on the configuration parameter indicated by the network device and its own signal measurement result as the channel transmission power.
- the channel transmit power indicates the maximum transmit power that the terminal device can use to transmit uplink data at the current moment.
- p p is used to indicate the channel transmission power of uplink data.
- the terminal device can determine the channel transmission power p p of the uplink data by the following formula:
- the maximum transmission power p max is the same as p CMAX, f, c (i), and the channel transmission power p p is the same as p PUSCH, b, f, c (i , j, q d , l).
- BWP bandwidth
- PUSCH physical uplink shared channel
- f is the carrier occupied by PUSCH transmission.
- c is the serving cell where the carrier is located.
- l is a power control parameter set configured by a network device through high-level signaling, and parameter values configured by the following high-level signaling are all configured in the power control parameter set.
- p CMAX, f, c (i) is the maximum transmission power.
- p O_PUSCH, b, f, c (j) are parameter values configured by the network device through higher layer signaling.
- the terminal device further determines The corresponding indication field selects one of the plurality of parameter values for determination, or selects one of the plurality of parameter values for determination according to a predefined rule.
- ⁇ a, b, c (j) are parameter values configured by the network device through higher layer signaling.
- the terminal device When the network device configures multiple parameter values through the high layer, the terminal device further according to the corresponding information in the downlink control information (DCI)
- DCI downlink control information
- the instruction field selects one of the plurality of parameter values for determination, or selects one of the plurality of parameter values for determination according to a predefined rule.
- PL b, f, c (q d ) is estimated based on a reference resource (RS) configured by a network device.
- RS reference resource
- the values of ⁇ TF, b, f, c (i) are related to the number of transmission layers, and can be related to the number of code blocks, the size of the code blocks, the number of REs occupied by the PUSCH, and the type of data carried on the PUSCH.
- K S indicates through high-level signaling that the value of BPRE is related to the number of code blocks, the size of code blocks, and the number of REs occupied by PUSCH.
- f b, f, c (i, l) is determined according to the transmission power control (TPC) indication carried in the DCI.
- TPC transmission power control
- the TPC indicates an absolute amount
- f b, f, c (i , l) ⁇ PUSCH, b, f, c (i last , i, K PUSCH , l).
- the terminal device determines the transmission power of the PUSCH used on each transmission port according to the channel transmission power and the number of antenna ports M used to send uplink data.
- the transmission power of each transmission port is the channel transmission power. Ratio to M.
- the number N of antenna ports used to send uplink data is less than or equal to M, and the actual transmission power represents the total transmission power of the N antenna ports that the terminal device actually uses when sending uplink data.
- the actual transmission power is less than or equal to the channel transmission power.
- p t is used to represent the actual transmission power.
- the terminal device may determine whether to use the channel transmission power to send uplink data.
- One case is to use the channel transmission power to send uplink data. That is, the actual transmission power is equal to the channel transmission power.
- the terminal device does not perform a power scaling operation, and uses the channel transmission power to send uplink data.
- Another case is to use a power smaller than the channel transmission power to send uplink data.
- the terminal device can perform a power scaling operation. , Using the scaled power of the channel transmission power to send uplink data.
- the actual transmission power may also be a calculated value of the actual transmission power determined by the terminal device, and the actual transmission power may also be a result of scaling according to the foregoing parameters and / or the values of M and N.
- the actual transmission power of each antenna port may be a calculated value determined by the terminal device, or may be based on the above parameters and / or M The values of N and N are scaled.
- each precoding matrix includes two parts of amplitude quantization value and phase, and a precoding matrix with a transmission layer number of 2.
- the amplitude quantization value is 1/2
- the phase rotation relationship of each antenna port can be expressed as
- Table 1 represents a codebook consisting of a precoding matrix with 2 antenna ports and 1 transmission layer
- Table 2 represents a precoding consisting of 4 antenna ports with 4 transmission layers
- Table 3 shows a codebook consisting of a matrix of precoding matrices with 4 antenna ports and 1 transmission layer.
- one precoding matrix corresponds to one index, which can be referred to as a precoding indicator (transmission, precoding, matrix, or indicator) (TPMI) index. That is, a precoding indicator index is used to indicate the corresponding precoding matrix.
- TPMI transmission, precoding, matrix, or indicator
- the precoding matrix is divided into three types of precoding matrices according to the coherence capability between the antenna ports of the terminal equipment: the precoding matrix with full-coherent capability and the partial-coherent ) Capable precoding matrix and non-coherent capable precoding matrix.
- the three types of precoding matrices are introduced separately.
- This type of precoding matrix indicates that all antenna ports (M antenna ports) configured by the network device to send uplink data complete phase calibration and can be phase weighted, that is, , All antenna ports can be used to send uplink data in one transmission layer.
- the precoding matrix indicated by each index value in TPMI index values 2-5 in Table 1 the precoding matrix indicated by each index value in TPMI index values 12-27 in Table 2, and the TPMI index value in Table 3.
- the precoding matrix indicated by each index value in 12-27 is a fully capable precoding matrix.
- Partial-coherent capability precoding matrix This type of precoding matrix indicates that each antenna port of a terminal device that can be used to send uplink data completes phase calibration and can perform phase weighting. Phase calibration is not completed between antenna port pairs, and phase weighting cannot be performed. In other words, in a transmission layer, uplink data can be sent using two antenna ports that have been calibrated.
- the precoding matrix indicated by each index value in the TPMI index values 4-11 in Table 2 and the precoding matrix indicated by each index value in the TPMI index values 6-13 in Table 3 are pre-coding matrices with partial coherence. Encoding matrix.
- Non-coherent capability precoding matrix This type of precoding matrix indicates that all antenna ports of a terminal device that can be used to send uplink data have not completed phase calibration and cannot be phase weighted. In other words, only one antenna port can be used to send uplink data in a transmission layer.
- the precoding matrix indicated by each index value in TPMI index values 0-1 in Table 1 the precoding matrix indicated by each index value in TPMI index values 0-3 in Table 2, and the TPMI index value in Table 3.
- the precoding matrices indicated by the precoding matrices 14-21 indicated by each index value in 0-5 are all non-coherent precoding matrices.
- the rank of the precoding matrix represents the number of transmission layers
- the number of rows of the precoding matrix represents the number of antenna ports M configured by the network device for sending uplink data
- the number of non-zero rows represents sending uplink data The number of antenna ports N used.
- One transmission layer uses one antenna port (corresponding to the number of non-zero values in each column in the matrix) to send uplink data.
- the types of the precoding matrix have been described in detail above.
- the relationship between the number of M, N, and the number of transmission layers and the precoding matrix is further described in combination with the types of the precoding matrix.
- the relationship between specific N and M is related to the number of transmission layers.
- Two antenna ports are used in one transmission layer to send uplink data.
- the antenna ports used by different transmission layers are different.
- the transmission layer # 1 uses antenna port # 1 and antenna port # 3, and transmission layer # 2 uses antenna port # 2 and antenna port # 4. It can be understood that the transmitting antenna # 3 of the corresponding transmitting antenna # 1 can be regarded as a transmitting antenna pair.
- the relationship between specific N and M is related to the number of transmission layers.
- Each transmission layer uses one antenna port to send uplink data.
- the values of M and N in the present application may be parameters determined by the terminal device, or may be parameters configured by the terminal device, where M and N may both be determined by the terminal device or both It is configured, or one parameter of M and N is configured. Another parameter of M and N is determined by the terminal device. After the terminal device calculates according to the value of N, the actual number of antenna ports actually used is less than The N value. In one embodiment, the value of N is the number of ports where the terminal device transmits data with non-zero power.
- the ratio of the actual transmission power p t to the channel transmission power P p may be referred to as a power control factor, and t is used to represent the power control factor.
- the precoding matrix includes an amplitude quantization value and a phase.
- the amplitude quantization value can represent the transmission power on each non-zero antenna port, and thus can also represent the power control factor.
- There is a relationship between the power control factor and the amplitude quantization value: t ⁇ 2 ⁇ l ⁇ N, where ⁇ represents the amplitude quantization value, and l represents the number of transmission layers corresponding to each antenna port, or that the same antenna port is used The number of transport layers that sent data.
- the transmission power p 0 of each antenna port is ( ⁇ 2 ⁇ l) ⁇ p p .
- the amplitude quantization value is 1/2
- the amplitude quantization value is 1/2
- N 2
- the amplitude quantization value is 1/2
- N 4
- N is less than M
- the actual transmission power is always less than the channel transmission power.
- the embodiment of the present application provides a method for transmitting data, and improves the transmission reliability of data by flexibly adjusting the actual transmission power of the data.
- FIG. 2 is a schematic interaction diagram of a data transmission method 100 according to an embodiment of the present application. Each step in the method 100 will be described in detail below.
- the network device sends information indicating a configuration parameter to the terminal device, where the configuration parameter is used to determine a channel transmission power.
- the configuration parameter may include some of the parameters in the formula for determining the channel transmission power described above, and may also include a parameter for determining the remaining parameters in the above formula.
- the configuration parameter includes the maximum transmission power (for example, p CMAX, f, c (i)), and the number of resource blocks (RB) occupied by the PUSCH used to carry uplink data (for example, ), And other related parameters (for example, p O_PUSCH, b, f, c (j), ⁇ a, b, c (j)), etc.
- the configuration parameters also include RS (the terminal device can determine PL b based on the RS , f, c (q d )) or power adjustment value (the terminal device can determine f b, f, c (i, l)) and other parameters based on the power adjustment value. In this way, the terminal device can determine the channel transmission power based on the received configuration parameters.
- the terminal device determines the channel transmission power of the first uplink data to be transmitted according to the configuration parameter.
- the terminal device can determine the channel transmission power based on the following formula. For the explanation of each configuration parameter, refer to the above.
- the terminal device can also determine the channel transmission power according to other methods.
- the terminal device determines the actual transmission power of the first uplink data according to the transmission power and transmission parameters of the channel.
- the actual transmission power is less than or equal to the transmission power of the channel.
- the transmission parameters include one or more of the following. :
- Power headroom which represents the difference between the maximum transmission power allowed by the terminal device and the transmission power of the channel.
- the waveform used to send the first uplink data or
- a downlink control information DCI format used for scheduling the first uplink data or
- the modulation and coding scheme MCS used for sending the first uplink data or,
- the above transmission parameters can characterize whether the terminal device is at a cell edge or a non-cell edge to a certain extent. Therefore, the actual transmission power of the first uplink data may be determined according to the transmission parameters and the determined channel transmission power. The actual transmission power represents a total of transmission power on the N antenna ports used by the terminal device to send the first uplink data.
- the actual transmission power is naturally equal to the channel transmission power.
- the actual transmission power may be less than the transmission power of the channel, or may be equal to the transmission power of the channel, and the specific situation may be further determined through the transmission parameter.
- the actual transmission power is less than the transmission power of the channel, Then the actual transmission power can be understood as the scaled transmission power obtained after the terminal device performs a power scaling operation according to the channel transmission power and the transmission parameter.
- the actual transmission power is optional, and the total transmission power of the N antenna ports used to send the first uplink data is optional, and the actual transmission power may also be determined by other constraints.
- the power headroom is low, it means that the terminal equipment is at the edge of the cell with a high probability.
- the channel state such as signal to interference plus noise ratio (SINR) is low.
- SINR signal to interference plus noise ratio
- the power headroom is high, It indicates that the terminal device is most likely located in the center of the cell.
- the terminal device calculates and determines the power headroom based on the allowed maximum transmission power and the channel transmission power.
- the power headroom may also be generated by the maximum transmission power and channel transmission power allowed by the terminal device, and is not limited to the difference between the two. For example, the power headroom may be an upward value of the difference between the two or The result is rounded down.
- This waveform is a waveform used in data modulation.
- the waveform can be a discrete Fourier transform extended orthogonal frequency division multiple frequency (DFT-sOFDM) waveform, or it can be Based on cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveforms and the like.
- DFT-sOFDM discrete Fourier transform extended orthogonal frequency division multiple frequency
- CP-OFDM cyclic prefix orthogonal frequency division multiplexing
- the waveform of the uplink transmission is switched according to whether the terminal device is at the edge of the cell or whether the terminal device is power limited. For example, if the DFT-s-OFDM waveform is used, it indicates that the terminal device is at the edge of the cell with a high probability, or the terminal device is in a power-limited state (that is, the transmission performance will be improved due to power increase); if the CP-OFDM waveform is used, then It indicates that the terminal equipment is likely to be located at the center of the cell, or the terminal equipment is not in a power limited state.
- the DCI format may be any DCI format among multiple DCI formats for scheduling uplink data.
- the DCI format may be DCI format 0_0 or DCI format 0_1.
- a DCI format with a minimum number of bits included in a plurality of types of DCI used for scheduling uplink data may be referred to as a compact DCI format, for example, a DCI format 0_0.
- the DCI format detected by the terminal device is sent by the network device to the terminal device according to whether the terminal device is at a cell edge. For example, if the DCI format 0_0 is used, it indicates that the terminal device is most likely to be at the cell edge; if the DCI format 0_1 is used, it is indicated that the terminal device is at the cell center.
- the modulation method in the MCS can be any of the following four modulation methods: binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), 16 positive Quadrature Amplitude Modulation and 64QAM.
- BPSK binary phase shift keying
- QPSK quadrature phase shift keying
- 64QAM 16 positive Quadrature Amplitude Modulation
- 16QAM indicates a QAM modulation method including 16 symbols
- 64QAM indicates a QAM modulation method including 16 symbols.
- the MCS used by the terminal equipment to modulate data is determined according to the current channel quality.
- a low modulation order in the modulation method in MCS indicates poor channel quality, indicating that the terminal device is at a cell edge with a high probability, such as BPSK or QPSK;
- a high modulation order in the modulation method in MCS indicates that the channel quality is good, indicating that The terminal device is most likely in the center of the cell, for example, 16QAM or 64QAM.
- the value of power adjustment is a parameter characterizing the state of the channel. Generally, a large power adjustment value and poor channel quality indicate that the terminal device is most likely to be at the cell edge at this time; a small power adjustment value and good channel quality indicate that the terminal device is at the center of the cell or has reached the maximum transmit power at this time.
- the power adjustment value may be a cumulative value, and the cumulative value is determined by summing the previously determined ⁇ PUSCH, b, f, c and the ⁇ PUSCH, b, f, c indicated by the current DCI, or may be an absolute value.
- the absolute value is directly calculated according to the ⁇ PUSCH, b, f, c indicated by the TPC in the current DCI.
- the power adjustment value indicated by the TPC field may be a power adjustment value corresponding to any field value (or bit value) in Table 4.
- the network device may indicate a transmission parameter by using a bit value in the indication information, and the terminal device may determine the specific content of the transmission parameter by using the bit value. The terminal device may also determine the specific content of the transmission parameter by using other parameters.
- the embodiments of the application are not limited thereto, and all manners of determining transmission parameters are within the protection scope of the embodiments of the present application.
- the above transmission parameter may be an indication value, or other parameters may be implicitly or explicitly indicated.
- the power headroom may have multiple values, and a power headroom value is indicated by indicating 01.
- the terminal device calculates or queries the corresponding association relationship according to the indicated value or level to determine the calculation input parameter.
- the transmission parameter includes a power value
- the power headroom can be determined by using the difference between the maximum transmission power p max and the channel's transmitted power p p ; for another example, if the transmission parameter includes a waveform, it can be transmitted through the network.
- the bit value in the waveform information indicating the waveform sent by the device determines whether the waveform is a DFT-s-OFDM waveform or a CP-OFDM waveform.
- the terminal device uses the actual transmission power to send the first uplink data.
- the network device receives the first uplink data.
- the method further includes:
- the terminal device evenly distributes the actual transmission power to the N antenna ports used to send the first uplink data.
- the terminal device specifically uses the transmit power corresponding to each antenna port on the N antenna ports to send uplink data to complete the sending process of the first uplink data.
- the network device although the actual transmission power is determined by the terminal device, for the network device, in some cases, the network device also needs to know the actual transmission power in order to determine its scheduling policy, such as data Selection of precoding matrix used for transmission.
- the terminal device and the network device can determine the actual transmit power of the first uplink data according to the same manner, so that the terminal device and the network device have the same understanding of the actual transmit power of the first uplink data.
- the network device may determine the actual transmission power in various ways. Two ways are described below.
- the actual transmission power is determined by the channel transmission power and transmission parameters.
- the network device determines the transmission power of the channel.
- the specific process for the network device to determine the transmission power of the channel is as follows:
- the terminal device After the terminal device determines the transmission power of the channel in S110, it can calculate the difference between the maximum transmission power and the transmission power of the channel to obtain the power headroom.
- the terminal device sends power headroom information indicating the power headroom to the network device.
- the terminal device may use the uplink resources periodically configured by the network device to indicate the power headroom, and the periodically configured uplink resources may be uplink resources used for PUSCH transmission or PUCCH transmission.
- the terminal device may also report the power headroom according to an event, and the event is that the power headroom is greater than or equal to a threshold threshold. When this event occurs, the terminal device can use the uplink resources occupied by the first PUSCH transmission after the event to report the power headroom.
- the specific reporting format and the resources occupied by the power headroom can be defined in advance or Network equipment is configured through high-level signaling, where the resources reported for the power headroom are some of the uplink resources occupied by PUSCH transmission; the terminal equipment can also transmit the first PUCCH that meets the requirements after the event
- the occupied uplink resources are used to report the power headroom.
- the specific reporting format and the resources used to report the power headroom can be defined in advance or configured by network equipment through high-level signaling.
- the resources reported by the power headroom are transmitted by PUCCH. For the part of the occupied uplink resources, the requirement may be the number of bits that can be further reported by the power headroom in addition to the first number of bits.
- the first number of bits is the PUCCH resource indicated by the network device and the UCI bit that needs to be reported currently.
- Number (including HARQ bits and CSI bits, in addition to power headroom information)
- the CH can carry the number of UCI bits.
- the number of bits reported by the power headroom may correspond to the absolute power headroom value, for example, a way of corresponding to different bit values according to a certain step within an integer value interval defining [0,23] / [0,26], or relative
- the relative power headroom value for the maximum transmission power corresponds to different bit values according to a certain step size, or only 1 bit corresponds to indicate that the first threshold is exceeded.
- the network device determines the transmission power of the channel according to the power headroom information and the maximum transmission power.
- the maximum transmission power is configured by the network device to the terminal device. Therefore, the network device knows the maximum transmission power and can determine the channel transmission based on the maximum transmission power and the power headroom obtained from the power headroom information. power.
- the network device determines the actual transmission power of the first uplink data according to the channel transmission power and the transmission parameter.
- both S130 and S140 may occur before S120 or S150, or both may occur after S120 or S150, and the embodiment of the present application is not limited thereto.
- the terminal device may send information indicating the actual transmission power to the network device, so that the network device determines the actual transmission power based on the information.
- the channel-based The transmission power and various transmission parameters that can indicate whether the terminal device is at the cell edge determine the actual transmission power of the uplink data, thereby flexibly adjusting the actual transmission power of the uplink data, and further improving the reliability of data transmission.
- the actual transmission power determined by the terminal device according to the channel transmission power and transmission parameters may be less than or equal to the channel transmission power.
- N is less than M
- the actual transmission power is less than the channel transmission power, or the actual transmission power is the scaled transmission power obtained after the terminal device performs a power scaling operation.
- the actual transmission power is no longer determined based on the existing technology, but the transmission power needs to be increased to obtain the actual transmission power, then the actual transmission power p t > (N / M) ⁇ p p ,
- the actual transmission power is less than or equal to the channel transmission power.
- the specific increase of the transmission power may be based on a protocol specification or an instruction from a network device, and the embodiment of the present application is not limited thereto.
- the actual transmission power is determined according to the channel transmission power and power headroom.
- the first condition is used to determine that the terminal device is at a cell edge.
- the power headroom meeting the first condition may be a judgment process, that is, the terminal device determines whether the power headroom meets the first condition. In one case, the terminal device determines that the power headroom meets the first condition. Condition, the terminal device determines the actual transmission power, and the determined actual transmission power satisfies certain constraints; for example, if the power headroom meets the first condition, it may also be a parameter based on or related to the power headroom Value, or power headroom level, and related instructions for making a judgment and determination; for another example, if the power headroom meets the first condition, the power headroom value (or power headroom level) and the transmission power may be used.
- the process of determining the associated relationship of the constraints on the actual transmission power or the constraint relationship of the actual transmission power is similar to this.
- the first condition is that the power headroom is greater than or equal to a first threshold.
- the transmission power needs to be increased.
- the first threshold may also be associated with certain parameters, for example, the first threshold is associated with antenna port information. Wherein, if the first condition is that the power headroom is greater than or equal to the first threshold, the first threshold may have one or more of the following associations:
- the first threshold is equal to 6 dBm; or
- the first threshold is equal to 3 dBm; or
- the first threshold is equal to 3 dBm.
- M 2
- the precoding matrix is a non-coherent precoding matrix
- the number of transmission layers is 1, and the corresponding first threshold is 3 dBm.
- the terminal device may store the above-mentioned association relationship, and in a case where confirmation is required, the value of the first threshold may be confirmed by querying.
- the terminal device may store the association relationship of the first threshold, determine the first threshold according to the stored association relationship, and further determine whether the power headroom meets the first condition (for example, whether the threshold relationship is satisfied).
- This can be used as a separate embodiment or combined with other embodiments. Other similar forms in this application may also appear in this form.
- the unit for describing power may be not only dBm, but also dB, and in specific implementation, it may also be other quantized values, levels, or parameter values.
- the embodiments of the present application are not limited to this. .
- the actual transmission power is equal to the channel Transmit power.
- the transmission power of each antenna port among the N antenna ports will be described in the case where the actual transmission power is equal to the transmission power of the channel, and the amplitude quantization value of the associated precoding matrix will be described.
- the transmit power of each antenna port is as follows:
- N 2
- the transmission power of one antenna port of the N antenna ports meets the foregoing conditions, and the transmission power of each antenna port of the N antenna ports also meets the foregoing conditions.
- the transmit power of an antenna port is the channel transmit power.
- Table 5 describes the power headroom and the amplitude quantization value of the precoding matrix in different scenarios when the actual transmission power is the channel transmission power.
- the terminal device determines a precoding matrix based on the TPMI sent by the network device for indicating the precoding matrix, and uses the precoding matrix to precode the first uplink data.
- the The amplitude quantization value of the precoding matrix may indicate that the actual transmit power of the first uplink data is equal to (N / M) ⁇ p p .
- the terminal device determines that the transmission power needs to be increased based on the transmission parameters, if the amplitude quantization value of the precoding matrix according to the prior art is related to the power between the ports The allocation relationship does not match.
- the terminal device can be agreed to precode the first uplink data by using a precoding matrix adjusted for the amplitude quantization value.
- the actual transmission power may be further determined according to the value range of the power headroom, and the quantized values of the amplitudes of the corresponding precoding matrices are also different.
- the method of determining the actual transmission power according to the value range of PH is described in Table 6.
- N 1 is specifically the precoding matrix is not The coherence-capable precoding matrix, that is, the precoding matrix indicated by the TPMI index value 0-3, the amplitude quantization value of each precoding matrix is increased to 1.
- the reason why the TPMI index values 0 and 2 are divided into one group and the TPMI index values 1 and 3 are divided into another group is that the channel correlation of the antenna ports corresponding to the TPMI index values 0 and 2 is high, and the TPMI index values are high.
- the channel correlation between the antenna ports corresponding to 1 and 3 is high, and the channel correlation between the antenna port groups is low.
- the method for transmitting data provided in the embodiments of the present application, on the one hand, in a case where the power margin capable of characterizing the position of the terminal device meets the first condition, the terminal device at the cell edge can be used by increasing the actual transmission power. Higher transmission power sends uplink data, which improves the reliability of data transmission.
- sending uplink data by using the scaled channel transmission power is beneficial to the terminal device at the non-cell edge to reduce the data. The interference caused by transmission will also help the terminal equipment to reduce power consumption.
- the actual transmission power is determined according to the channel transmission power and waveform.
- the DFT-s-OFDM waveform When normal circumstances, if the DFT-s-OFDM waveform is used, it indicates that the terminal device is most likely to be at the edge of the cell, or the terminal device is in a power-limited state (that is, the transmission performance will be improved due to the power increase), so the transmission power needs to be increased.
- other waveforms for example, CP-OFDM waveform
- the network device can indicate the waveform used by the first uplink data through high-level signaling or DCI signaling, and the terminal device can directly determine the actual transmission used to send the first uplink data transmission based on the information of the indicated waveform. power.
- the actual transmission power is equal to the channel Transmit power.
- the terminal device does not perform a power scaling operation.
- the actual transmission power is equal to the channel transmission power, and the channel transmission power is used to send uplink data.
- the waveform is other waveforms ( For example, CP-OFDM waveform)
- the terminal device performs a power scaling operation to transmit the scaled power of the channel.
- the transmission power of each antenna port among the N antenna ports will be described in the case where the actual transmission power is equal to the transmission power of the channel, and the amplitude quantization value of the associated precoding matrix will be described.
- the transmit power of each antenna port is as follows:
- N 2
- the transmission power of one antenna port of the N antenna ports meets the foregoing conditions, and the transmission power of each antenna port of the N antenna ports also meets the foregoing conditions.
- the precoding of the first uplink data is performed.
- Amplitude quantization value of the encoding matrix please refer to the related description of case 1. For brevity, we will not repeat them here.
- the transmission parameters include a waveform
- Table 7 describes the waveform and the amplitude quantization value of the precoding matrix in different scenarios when the actual transmission power is the channel transmission power.
- the terminal device at the cell edge can use the Large transmission power sends uplink data, which improves the reliability of data transmission.
- the waveform that can characterize the position of the terminal device is a CP-OFDM waveform
- using the scaled channel transmission power to send uplink data is beneficial to reducing the data transmission band for terminal devices that are not at the cell edge. Incoming interference, while helping terminal equipment reduce power consumption.
- the actual transmission power is determined according to the channel transmission power and the DCI format.
- the DCI format is the first DCI format, and the determined actual transmission power p t > (N / M) ⁇ p p , where the first DCI may also be referred to as the compact DCI described above.
- the network device instructs control information configuration parameters through high-level signaling, and the control information configuration parameter includes a time-frequency code resource carrying the DCI signaling, and a detection method for the DCI by the terminal device. Detection cycle, number of detections, DCI format to be detected, etc. Among them, for a certain DCI signaling, the network device can be configured with multiple DCI formats that need to be detected, and the terminal device needs to try the multiple DCI formats at each DCI detection moment, and determine the current DCI signaling through blind detection The DCI format used.
- the actual transmission power is equal to the channel Transmit power.
- the transmission power of each antenna port among the N antenna ports will be described in the case where the actual transmission power is equal to the transmission power of the channel, and the amplitude quantization value of the associated precoding matrix will be described.
- the transmit power of each antenna port is as follows:
- N 2
- the transmission power of one antenna port of the N antenna ports meets the foregoing conditions, and the transmission power of each antenna port of the N antenna ports also meets the foregoing conditions.
- the precoding of the first uplink data is performed.
- Amplitude quantization value of the encoding matrix please refer to the related description of case 1. For brevity, we will not repeat them here.
- the transmission parameters include parameters for indicating the DCI format
- the precoding matrix is partially coherent, and the number of transmission layers is 1 scene.
- Table 8 describes the DCI format and the amplitude quantization value of the precoding matrix in different scenarios when the actual transmission power is the channel transmission power.
- the DCI format capable of characterizing the position of the terminal device is a DCI format with a minimum number of bits included in a plurality of DCI formats for scheduling uplink data (for example, the first DCI Format), by increasing the actual transmission power, the terminal device at the edge of the cell can use a larger transmission power to send uplink data, which improves the reliability of data transmission.
- the DCI format capable of characterizing the position of the terminal device is not the first DCI format
- using the scaled channel transmission power to send uplink data is beneficial for the terminal device at the non-cell edge to reduce the data. The interference caused by transmission will also help the terminal equipment to reduce power consumption.
- the actual transmission power is determined according to the channel transmission power and the MCS.
- the modulation order in the modulation method in MCS is low.
- BPSK or QPSK indicates that the channel quality is poor, indicating that the terminal device is most likely to be at the edge of the cell, or that the terminal device is in a power-constrained state.
- Transmit power the actual transmit power p t > (N / M) ⁇ p p ;
- the modulation order in the modulation method in MCS is high, for example, 16QAM or 64QAM, which indicates that the channel quality is good, indicating that the terminal device is most likely to be in the center of the cell Or, the terminal equipment is not in a power limited state, so there is no need to increase the transmission power.
- the actual transmission power p t (N / M) ⁇ p p , which not only saves the transmission power of the terminal equipment, but also avoids unnecessary power. Uplink interference brought by promotion.
- the network device can instruct the terminal device to send the MCS used by the first uplink data through the DCI.
- the MCS index value can be used to indicate the MCS used by the first uplink data.
- the terminal device can use The MCS determines the coding and modulation mode of the first uplink data, and determines the actual transmission power used to send the first uplink data transmission.
- Table 9 shows the MCS field of the DFT-s-OFDM waveform. Taking the MCS modulation order as 4 as an example, if the MCS modulation order is 4, you can index by any of the index values 10-16. The value indicates the MCS used to send the first uplink data.
- the actual transmission power is equal to the channel transmission power.
- the terminal device does not perform power scaling operation.
- the actual transmission power is equal to the channel transmission power, and the channel transmission power is used to send uplink data.
- the MCS modulation mode is other For a modulation method (for example, 16QAM or 64QAM)
- the transmission power of each antenna port among the N antenna ports will be described in the case where the actual transmission power is equal to the transmission power of the channel, and the amplitude quantization value of the associated precoding matrix will be described.
- the transmit power of each antenna port is as follows:
- N 2
- the transmission power of one antenna port of the N antenna ports meets the foregoing conditions, and the transmission power of each antenna port of the N antenna ports also meets the foregoing conditions.
- the precoding of the first uplink data is performed.
- Amplitude quantization value of the encoding matrix please refer to the related description of case 1. For brevity, we will not repeat them here.
- the transmission parameters include MCS
- the precoding matrix is a precoding matrix with partial coherence
- the number of transmission layers is 1.
- Table 10 describes the MCS modulation mode and pre-coding matrix amplitude quantization value in different scenarios when the actual transmission power is the channel transmission power.
- the terminal device at the cell edge can use the Large transmission power sends uplink data, which improves the reliability of data transmission.
- the modulation method of the MCS capable of characterizing the position of the terminal device is 16 quadrature amplitude modulation QAM or 64QAM and a higher-order modulation method
- the uplink channel data is transmitted using the scaled channel transmission power.
- the actual transmission power is determined according to the channel transmission power and the power adjustment value.
- the second condition is used to determine that the terminal device is at a cell edge. Similar to cases 1-4 above, this can also be a process of judgment or a process of determination.
- the TPC field in the DCI can refer to the description about Table 4 above. For brevity, it will not be repeated here.
- the second condition is that a power adjustment value obtained by the terminal device K times is greater than or equal to a second threshold.
- the power adjustment value is large, and the channel quality is poor, which indicates that the terminal device is at the cell edge at a high probability at this time.
- a good quantity indicates that the terminal equipment is at the center of the cell at this time. Therefore, there is no need to increase the transmission power.
- the actual transmission power p t (N / M) ⁇ p p , which not only saves the transmission power of the terminal equipment, but also avoids unnecessary transmission power. Interference caused by the increase in power.
- the second condition is that the power adjustment value obtained by the terminal device K times is greater than or equal to the second threshold value
- the second threshold is equal to 3 dBm, and K is an integer greater than or equal to 1.
- 3dBm here refers to the cumulative value of the power adjustment value.
- the second threshold may also be 4 dBm, where 3 dBm here refers to the absolute value of the power adjustment value.
- the power adjustment value obtained by K times may be the same or different, as long as it is greater than or equal to the second threshold.
- the second threshold is equal to 3 dBm
- K 2
- the power adjustment value obtained for the first time is 2 dBm
- the power adjustment value obtained for the second time is 3 dBm.
- the second condition is specifically that the power adjustment value obtained by the terminal device for consecutive K times is equal to the second threshold value.
- K 2 that is, if the power adjustment value obtained twice consecutively is greater than the second threshold value, it means that the terminal device is at the cell edge and needs to increase the transmission power.
- the actual transmission power is equal to the channel transmission power.
- the transmission power of each antenna port among the N antenna ports will be described in the case where the actual transmission power is equal to the transmission power of the channel, and the amplitude quantization value of the associated precoding matrix will be described.
- the transmit power of each antenna port is as follows:
- N 2
- the transmission power of one antenna port of the N antenna ports meets the foregoing conditions, and the transmission power of each antenna port of the N antenna ports also meets the foregoing conditions.
- the precoding of the first uplink data is performed.
- Amplitude quantization value of the encoding matrix please refer to the related description of case 1. For brevity, we will not repeat them here.
- the actual transmission power is increased to make it be at the cell edge.
- Terminal equipment can send uplink data with a larger actual transmission power, which improves the reliability of data transmission.
- the power adjustment value that can characterize the position of the terminal device obtained multiple times by the terminal device does not meet the second condition, the uplink channel data is transmitted using the scaled channel transmission power. For terminal devices that are not at the cell edge, In other words, it is beneficial to reduce the interference caused by data transmission, and it is also conducive to reducing the power consumption of terminal equipment.
- the method for transmitting data in the embodiment of the present application has been described in detail above.
- the method for transmitting data 100 is provided in the embodiment of the present application.
- Method 200 elaborates the solution from another implementation perspective.
- the network device determines the precoding matrix used by the uplink data to be sent by the terminal device through its own algorithm.
- the precoding matrix informs the terminal device. In this way, the terminal device can determine the actual transmission power based on the precoding matrix, and the method 100 is not required to determine the actual transmission power based on various transmission parameters.
- the network device determines a first precoding matrix for precoding the first uplink data, and the first precoding matrix belongs to the first precoding matrix subset or the second precoding matrix subset in the precoding matrix set. ,among them,
- the transmit power of uplink data determined based on each precoding matrix in one or more precoding matrices in the first precoding matrix subset satisfies the following condition: the transmit power p of one antenna port among the antenna ports used to send the uplink data. 0 > (1 / M) ⁇ p p , and the number of antenna ports used for sending uplink data is greater than or equal to 1 and less than M, based on the number of antenna ports in one or more precoding matrices in the second precoding matrix subset.
- the transmission power of the uplink data determined by each precoding matrix satisfies the following conditions: the transmission of one antenna port among the antenna ports used to send the uplink data
- Power p 0 (1 / M) ⁇ p p
- M is the number of antenna ports configured by the network device to send uplink data
- p p is the channel transmission power of the uplink data
- M is an integer greater than 1.
- the network device may determine a time-frequency resource and a transmission scheme used by the terminal device to send the first uplink data based on a current uplink channel quality and other parameters, where the transmission scheme includes a precoding used to send the first uplink data.
- Matrix ie, the first precoding matrix.
- the network device may select a precoding matrix from the first precoding matrix subset or the second precoding matrix subset in the precoding matrix set, and is used by the terminal device for the first precoding matrix.
- An upstream data is precoded.
- the precoding matrix set in the embodiment of the present application is described in detail below.
- the one or more precoding matrices in the first precoding subset correspond to the actual transmit power after power boosting. Specifically, based on each precoding matrix in the one or more precoding matrices, The transmission power p 0 > (1 / M) ⁇ p p of each antenna port in the transmission power determined by the coding matrix.
- the antenna port corresponding to the precoding matrix used to send uplink data is N (N is determined by the type of the precoding matrix), then the actual transmission power determined based on the precoding matrix is p 0 > (N / M) ⁇ p p ; one or more precoding matrices in the second precoding subset correspond to untransmitted transmit power, specifically, based on each of the one or more precoding matrices Among the transmission power determined by the precoding matrix, the transmission power p 0 of each antenna port is (1 / M) ⁇ p p .
- the precoding set in the embodiment of the present application may be prescribed by a protocol or a system, or may be configured in advance by a network device, and a specific implementation manner is not limited in any way.
- the precoding set in the The precoding matrix is a precoding matrix corresponding to all transmission layers whose transmission layer number is less than or equal to L for transmitting uplink data.
- One transmission layer number corresponds to one or more precoding matrices, and L is the maximum transmission that the terminal device can support. Number of layers, L is an integer greater than or equal to 1.
- the set of precoding matrices may include precoding matrices with non-coherent capabilities, or include precoding matrices with partially coherent capabilities and non-coherent capabilities, or may include precoding matrices with full coherence capabilities, or precoding matrices with partial coherence capabilities.
- non-coherent precoding matrix may correspond to one or more types of precoding matrices in the precoding set, or one or more precoding matrices corresponding to one transmission layer number may be different types of precoding matrices.
- the precoding matrix set in the embodiment of the present application may be indicated by a precoding and a maximum number of transmission layers (precoding information and number of layers) fields.
- Table 11 shows the precoding information and number of layers fields in the case of four antenna ports, the waveform is CP-OFDM, and the maximum number of transmission layers is 2-3.
- Table 12 shows the four antenna ports and the waveform is CP- In the case of OFDM, the maximum number of transmission layers is 1.
- bit-field index value of 11 can also be used to indicate a precoding matrix with a transmission layer number of 1
- bit-field index value of 12 can also be used to indicate a pre-coding matrix with a transmission layer number of 2.
- the network device based on the maximum number of transmission layers L that the terminal device can support and the type of precoding matrix supported, the network device passes all the number of transmission layers less than or equal to L and the precoding matrix that conforms to the type of the precoding matrix through high-level signaling.
- the bit field index value in the Precoding information and number of layers layers (for example, Table 11 or Table 12) is indicated to the terminal device.
- the terminal device is based on the TPMI of the uplink data currently to be sent through the DCI sent by the network device. Determine the precoding matrix indicated by the TPMI in the precoding matrix (for example, Table 1 or Table 2 or Table 3) of the antenna port and the number of transmission layers.
- the network device can use the Precoding information and number of layers layers according to the far right of Table 11.
- the correspondence between the precoding matrix and the bit field index indicates the precoding matrix to the terminal device.
- the terminal device also determines the precoding matrix according to the corresponding relationship between the rightmost precoding matrix and the bit field index value according to the bit value indicated by the field.
- TPMI 0 1
- TPMI 1 ... ... 3
- TPMI 3 4
- Layer 1: TPMI 4 ... ... 11
- Layer 1: TPMI 11 12
- Layer 1: TPMI 0 (amplitude quantization value is 1) 13
- TPMI 1 (amplitude quantization value is 1) 14
- Layer 1: TPMI 2 (amplitude quantization value is 1)
- the bit field index values 11-15 are used to indicate the non-coherent capable precoding matrix in the first precoding subset, and the number of transmission layers is 1 or 2, and the rest The bit field index value is used to indicate a non-coherent capable precoding matrix in the second precoding subset. If the set of precoding matrices includes a precoding matrix of partially coherent capability and a precoding matrix of non-coherent capability, the bit domain index values of 11, 30, and 31 are used to indicate the non-coherent capable precoding matrix in the first precoding subset.
- the number of transmission layers is 1, and the remaining bit field index values are used to indicate a pre-coding matrix with partial coherence or non-coherence in the second pre-coding subset. If the set of precoding matrices includes a precoding matrix with partial full coherence capability, a precoding matrix with partially coherent capability, and a precoding matrix with non-coherent capability, the bit domain index values 11, 30, 31, 60-63 are used to indicate the A non-coherent capable precoding matrix in a precoding subset. The number of transmission layers is 1 or 2. The remaining bit field index values are used to indicate the precoding matrix in the second precoding subset.
- the precoding matrix indicated by the bit field index value 12-15 is the first precoding matrix.
- the non-coherent capable precoding matrix in the coding subset, the number of transmission layers is 1, and the precoding matrix indicated by the remaining bit field index values is the precoding matrix in the second precoding subset.
- the determined actual transmission power is equal to the channel transmission power of the uplink data.
- each antenna in the antenna port used to send uplink data is The transmission power of the port will be described, and the amplitude quantization value of the associated precoding matrix will be described.
- the transmit power determined based on each precoding matrix in one or more precoding matrices in the first precoding matrix subset specifically meets the following conditions:
- the transmission power of one antenna port satisfies the foregoing conditions, and the transmission power of each antenna port in the antenna ports used for sending uplink data also meets the foregoing conditions.
- the precoding matrix is a non-coherent precoding matrix
- the number of transmission layers is 1, and M is not limited.
- the transmit power of an antenna port is the channel transmit power.
- M 4
- the precoding matrix is part
- Each precoding matrix in the first precoding matrix subset satisfies the following conditions:
- the number of antenna ports used for sending uplink data is equal to 1, and the amplitude quantization value of each precoding matrix in the first precoding matrix subset is 1,
- the number of antenna ports used for sending uplink data is equal to two, and the amplitude quantization value of each precoding matrix in the first precoding matrix subset is
- bit index values 12-15 are used to indicate a non-coherent capable precoding matrix with an amplitude quantization value of 1, the number of transmission layers is 1, and the bit index value of 11 is used.
- the quantized value at the indicated amplitude Non-coherent precoding matrix, the number of transmission layers is two. If the precoding matrix set includes partially coherent energy
- the precoding matrix is a strong precoding matrix and the non-coherent precoding matrix
- the bit-field index values of 11, 30, and 31 are used to indicate a non-coherent precoding matrix with an amplitude quantization value of 1, and the number of transmission layers is 1.
- the set of precoding matrices includes a precoding matrix with partially fully coherent capabilities, a precoding matrix with partially coherent capabilities, and a precoding matrix with non-coherent capabilities
- bit-field index value 60-63 indicates a non-coherent precoding matrix with an amplitude quantization value of 1, and the number of transmission layers is 1.
- bit-field index values 12-15 are used to indicate a non-coherent precoding matrix with an amplitude quantization value of 1.
- the precoding matrix includes phase and amplitude quantization values.
- the phase of the matrix belongs to the phase of the precoding matrix included in the second precoding matrix subset.
- the types of the two precoding matrices with the same phase in the two subsets are the same.
- the four precoding matrices in the first precoding subset are all precoding matrices with a transmission layer of 1, non-coherent capability, and the phases of the four precoding matrices belong to the bit domain index value 0-
- the number of occupied bits is determined based on the number of precoding matrices included in the precoding matrix set. For example, if the number of bits is N, the number of N bits can be Indicates 2 n precoding matrices, however, there may be some bit values remaining in practice. Since the phase of the precoding matrix in the first precoding matrix subset belongs to the phase of the precoding matrix in the second precoding subset, it means that the number of the first precoding subset is small.
- the coding matrix can be indicated by the remaining bit values in the precoding matrix set. Without changing the existing number of bits and without affecting the flexibility of the existing codeword selection, the reserved field is used to indicate the pre-adjusted amplitude quantization value. Encoding matrix.
- bit field index values 0-11 all indicate the precoding matrix in the second precoding matrix subset.
- Coding matrix bit field index value 11 indicates the precoding matrix corresponding to the 4-layer transmission
- 11 indicates the precoding matrix corresponding to the 2-layer transmission in the first precoding subset, and the remaining bit field index values 12-15 are used to indicate the precoding matrix corresponding to the 1-layer transmission in the first precoding subset.
- the network device sends instruction information used to indicate the first precoding matrix to the terminal device.
- the instruction information is the TPMI described above.
- the terminal device determines the actual transmission power of the first uplink data according to the first precoding matrix and the channel transmission power of the first uplink data.
- the terminal device uses the relationship between the amplitude quantization value of the precoding matrix and the actual transmission power to determine the actual transmission power based on the amplitude quantization value of the precoding matrix and the channel transmission power, and specifically determines the description of the actual transmission power
- the terminal device uses the relationship between the amplitude quantization value of the precoding matrix and the actual transmission power to determine the actual transmission power based on the amplitude quantization value of the precoding matrix and the channel transmission power, and specifically determines the description of the actual transmission power
- the terminal device uses the actual transmission power to send the first uplink data.
- a first precoding subset and a second precoding subset are set in a precoding set, where an uplink determined based on a precoding matrix in the first precoding matrix subset
- FIG. 5 shows a schematic block diagram of a data transmission apparatus 300 according to an embodiment of the present application. As shown in FIG. 5, the apparatus 300 includes:
- a processing unit 310 configured to determine a channel transmission power of the first uplink data
- the processing unit 310 is further configured to determine an actual transmission power of the first uplink data according to the channel transmission power and transmission parameters, where the actual transmission power is less than or equal to the channel transmission power, wherein the transmission
- the parameters include one or more of the following:
- Power headroom where the power headroom indicates a difference between the maximum transmission power allowed by the device and the transmission power of the channel, and the channel transmission power is less than or equal to the maximum transmission power allowed by the device, or,
- a waveform used for sending the first uplink data or
- a downlink control information DCI format for scheduling the first uplink data or
- the modulation and coding scheme MCS used for sending the first uplink data or
- the sending unit 320 is configured to use the actual sending power to send the first uplink data.
- N is less than M
- M is the number of antenna ports configured by the network device to send the first uplink data
- N is the number of M antenna ports used to send the first uplink data.
- the number of non-zero power antenna ports, N is an integer greater than or equal to 1
- M is an integer greater than 1.
- the transmission parameter includes the power headroom
- the power headroom satisfies a first condition, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power.
- the terminal device at the cell edge can use a larger device by increasing the actual transmission power.
- the transmission power sends uplink data, which improves the reliability of data transmission.
- the first condition is that the power headroom is greater than or equal to a first threshold
- the first threshold is equal to 6 dBm; or
- the first threshold is equal to 3 dBm; or
- the first threshold is equal to 3 dBm.
- the transmission parameter includes a waveform used for sending the first uplink data
- the waveform is a discrete Fourier transform extended orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power .
- the transmission parameter includes a downlink control information DCI format used for sending the first uplink data
- the DCI format is a first DCI format, the actual transmission power p t > (N / M) ⁇ p p , and the first DCI format is a plurality of DCI formats used for scheduling uplink data with a minimum number of bits.
- DCI format, p p is the transmission power of the channel.
- the transmission parameter includes the modulation and coding scheme MCS used for sending the first uplink data
- the modulation method of the MCS is binary phase shift keying BPSK or quadrature phase shift keying QPSK, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power.
- the transmission parameter includes a power adjustment value used for sending the first uplink data
- the power adjustment value obtained by the processing unit K times satisfies the second condition, the actual transmission power p t > (N / M) ⁇ p p , where p p is the transmission power of the channel, and K is greater than or equal to 1. Integer.
- the second condition is that a power adjustment value obtained by the processing unit K times is greater than or equal to a second threshold, and the second threshold is equal to 3 dBm.
- the second condition is specifically that a power adjustment value obtained by the processing unit for consecutive K times is equal to the second threshold, and K is an integer greater than 1.
- the actual transmission power is equal to the channel transmission power.
- N 2
- processing unit 310 is further configured to:
- the actual transmission power is evenly allocated to the N antenna ports used to send the first uplink data.
- the apparatus for transmitting data determines the actual transmission power of uplink data based on the channel transmission power and various transmission parameters capable of characterizing whether the terminal device is at the cell edge, and can flexibly adjust the actual transmission power of uplink data. , Thereby improving the reliability of data transmission.
- the apparatus 300 for transmitting data may correspond to (for example, may be configured on or itself) the terminal device described in the above method 100, and each module or unit in the apparatus 300 for transmitting data is respectively used to execute the terminal in the above method 100 Each action or process performed by the device is omitted here to avoid detailed description.
- the device 300 may be a terminal device.
- the device 300 may include a processor, a transmitter, and a receiver, and the processor, the transmitter, and the receiver are communicatively connected.
- the device also includes a memory, and the memory is communicatively connected to the processor.
- the processor, the memory, the transmitter, and the receiver may be communicatively connected.
- the memory may be used to store instructions.
- the processor is configured to execute the instructions stored in the memory to control the transmitter to send information or the receiver to receive signals.
- the processing unit 310 in the apparatus 300 shown in FIG. 5 may also correspond to a processor, and the sending unit 320 in the apparatus 300 shown in FIG. 5 may correspond to a transmitter.
- the transmitter and the receiver may be implemented by the same component transceiver.
- the device 300 may be a chip (or a chip system) installed in a terminal device.
- the device 300 may include a processor and an input / output interface.
- the interface is communicatively connected with the transceiver of the network device.
- the device further includes a memory, and the memory is communicatively connected with the processor.
- the processor, the memory, and the transceiver may be communicatively connected.
- the memory may be used to store instructions.
- the processor is configured to execute the instructions stored in the memory to control the transceiver to send information or signals.
- the processing unit 310 in the apparatus 300 shown in FIG. 5 may correspond to a processor, and the sending unit 320 in the apparatus 300 shown in FIG. 5 may correspond to an output interface.
- FIG. 6 shows a schematic block diagram of an apparatus 400 for transmitting data according to an embodiment of the present application.
- the apparatus 400 includes:
- a processing unit 410 configured to determine a channel transmission power of the first uplink data
- the processing unit 410 is further configured to determine the actual transmission power of the first uplink data according to the channel transmission power and transmission parameters, where the actual transmission power is less than or equal to the channel transmission power, wherein the transmission
- the parameters include one or more of the following:
- a power headroom where the power headroom indicates a difference between the maximum transmission power allowed by the terminal device and the transmission power of the channel, and the channel transmission power is less than or equal to the maximum transmission power allowed by the terminal device, or,
- a waveform used for sending the first uplink data or
- a downlink control information DCI format for scheduling the first uplink data or
- the modulation and coding scheme MCS used for sending the first uplink data or
- the receiving unit 420 is configured to receive the first uplink data.
- N is less than M
- M is the number of antenna ports configured by the network device to send the first uplink data
- N is the number of M antenna ports used to send the first uplink data.
- the number of non-zero power antenna ports, N is an integer greater than or equal to 1
- M is an integer greater than 1.
- the transmission parameter includes the power headroom
- the power headroom satisfies a first condition, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power.
- the first condition is used to determine that the terminal device is at a cell edge.
- the first condition is that the power headroom is greater than or equal to a first threshold
- the first threshold is equal to 6 dBm; or
- the first threshold is equal to 3 dBm; or
- the first threshold is equal to 3 dBm.
- the transmission parameter includes a waveform used for sending the first uplink data
- the waveform is a discrete Fourier transform extended orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power .
- the waveform is a CP-OFDM waveform
- the actual transmission power p t (N / M) ⁇ p p .
- the transmission parameter includes a downlink control information DCI format used for sending the first uplink data
- the DCI format is a first DCI format, the actual transmission power p t > (N / M) ⁇ p p , and the first DCI format is a plurality of DCI formats used for scheduling uplink data with a minimum number of bits.
- DCI format, p p is the transmission power of the channel.
- the DCI format is a second DCI format
- the actual transmission power p t (N / M) ⁇ p p
- the second DCI format is multiple for scheduling uplink data.
- the transmission parameter includes the modulation and coding scheme MCS used for sending the first uplink data
- the modulation method of the MCS is binary phase shift keying BPSK or quadrature phase shift keying QPSK, the actual transmission power p t > (N / M) ⁇ p p , and p p is the channel transmission power.
- the transmission parameter includes a power adjustment value used for sending the first uplink data
- the power adjustment value obtained by the terminal device K times satisfies the second condition, the actual transmission power p t > (N / M) ⁇ p p , where p p is the transmission power of the channel, and K is greater than or equal to 1. Integer.
- the second condition is used to determine that the terminal device is at a cell edge.
- the actual transmission power p t (N / M) ⁇ p p .
- the second condition is that a power adjustment value obtained by the terminal device K times is greater than or equal to a second threshold, and the second threshold is equal to 3 dBm.
- the second condition is specifically that a power adjustment value obtained by the terminal device for consecutive K times is equal to the second threshold, and K is an integer greater than 1.
- the actual transmission power is equal to the channel transmission power.
- the channel-based The transmission power and various transmission parameters that can indicate whether the terminal device is at the cell edge determine the actual transmission power of the uplink data, thereby flexibly adjusting the actual transmission power of the uplink data, and further improving the reliability of data transmission. At the same time, it facilitates the scheduling of the device and the optimization of the system.
- the apparatus 400 for transmitting data may correspond to (for example, may be configured on or in itself) the network device described in the foregoing method 100, and each module or unit in the apparatus 400 for transmitting data is respectively used to execute the network in the above method 100 Each action or process performed by the device is omitted here to avoid detailed description.
- the apparatus 400 may be a network device.
- the apparatus 400 may include a processor, a transmitter, and a receiver, and the processor, the transmitter, and the receiver are communicatively connected.
- the device also includes a memory, and the memory is communicatively connected to the processor.
- the processor, the memory, the transmitter, and the receiver may be communicatively connected.
- the memory may be used to store instructions.
- the processor is configured to execute the instructions stored in the memory to control the transmitter to send information or the receiver to receive signals.
- the processing unit 410 in the apparatus 400 shown in FIG. 6 may also correspond to a processor, and the receiving unit 420 in the apparatus 400 shown in FIG. 6 may correspond to a receiver.
- the device 400 may be a chip (or a chip system) installed in a network device.
- the device 400 may include a processor and an input / output interface. The interface is communicatively connected with the transceiver of the network device.
- the device further includes a memory, and the memory is communicatively connected with the processor.
- the processor, the memory, and the transceiver may be communicatively connected.
- the memory may be used to store instructions.
- the processor is configured to execute the instructions stored in the memory to control the transceiver to send information or signals.
- the processing unit 410 in the apparatus 400 shown in FIG. 6 may correspond to a processor, and the receiving unit 420 in the apparatus 400 shown in FIG. 6 may correspond to an input interface.
- FIG. 7 shows a schematic block diagram of an apparatus 500 for transmitting data according to an embodiment of the present application.
- the apparatus 500 includes:
- the receiving unit 510 is configured to receive indication information, where the indication information is used to indicate a first precoding matrix used for sending first uplink data, where the first precoding matrix belongs to a first precoding matrix in a precoding matrix set. A subset or a second precoding matrix subset, wherein,
- the transmit power of the uplink data determined based on each of the one or more precoding matrices in the first precoding matrix subset satisfies the following condition: the transmit power of one antenna port among the antenna ports used to send the uplink data p 0 > (1 / M) ⁇ p p , and the number of antenna ports used for sending uplink data is greater than or equal to 1 and less than M, based on one or more precodings in the second precoding matrix subset
- M is the number of antenna ports configured by the network device to send the first uplink data, M is an integer greater than 1, and p p is a channel transmission power of the uplink data;
- a processing unit 520 configured to determine the actual transmission power of the first uplink data according to the first precoding matrix and the channel transmission power of the first uplink data, where the actual transmission power is less than or equal to the first Channel transmit power of uplink data;
- the sending unit 530 is configured to use the actual sending power to send the first uplink data.
- the transmit power determined based on each precoding matrix in one or more precoding matrices in the first precoding matrix subset specifically meets the following conditions:
- each precoding matrix in the precoding matrix set includes a phase and amplitude quantization value, where the amplitude quantization value is used to determine transmission power of uplink data, where:
- a phase of each precoding matrix in one or more precoding matrices in the first precoding matrix subset belongs to a phase of a precoding matrix included in the second precoding matrix subset.
- the apparatus for transmitting data in the embodiment of the present application sets a first precoding subset and a second precoding subset in a precoding set, where the precoding matrix is determined based on any one of the precoding matrix subsets.
- the apparatus 500 for transmitting data may correspond to (for example, may be configured on or itself) the terminal device described in the foregoing method 200, and each module or unit in the apparatus 500 for transmitting data is respectively used to execute the terminal in the above method 200 Each action or process performed by the device is omitted here to avoid detailed description.
- the apparatus 500 may be a terminal device.
- the apparatus 500 may include a processor, a transmitter, and a receiver, and the processor, the transmitter, and the receiver are communicatively connected.
- the device also includes a memory, and the memory is communicatively connected to the processor.
- the processor, the memory, the transmitter, and the receiver may be communicatively connected.
- the memory may be used to store instructions.
- the processor is configured to execute the instructions stored in the memory to control the transmitter to send information or the receiver to receive signals.
- the receiving unit 510 in the device 500 shown in FIG. 7 may correspond to a receiver, and the processing unit 520 in the device 500 shown in FIG. 7 may correspond to a processor.
- the sending unit 530 may correspond to the transmitter.
- the transmitter and the receiver may be implemented by the same component transceiver.
- the device 500 may be a chip (or a chip system) installed in a terminal device.
- the device 500 may include a processor and an input / output interface.
- the interface is communicatively connected with the transceiver of the terminal device.
- the device further includes a memory, and the memory is communicatively connected with the processor.
- the processor, the memory, and the transceiver may be communicatively connected.
- the memory may be used to store instructions.
- the processor is configured to execute the instructions stored in the memory to control the transceiver to send information or signals.
- the receiving unit 510 in the device 500 shown in FIG. 7 may correspond to the input interface
- the processing unit 520 in the device 500 shown in FIG. 7 may correspond to the processor
- the sending in the device 500 shown in FIG. 7 The unit 530 may correspond to an output interface.
- FIG. 8 shows a schematic block diagram of an apparatus 600 for transmitting data according to an embodiment of the present application. As shown in FIG. 8, the apparatus 600 includes:
- a processing unit 610 is configured to determine a first precoding matrix for precoding the first uplink data, where the first precoding matrix belongs to the first precoding matrix subset or the second precoding matrix subset in the precoding matrix set. Set, where,
- the transmit power of the uplink data determined based on each of the one or more precoding matrices in the first precoding matrix subset satisfies the following condition: the transmit power of one antenna port among the antenna ports used to send the uplink data p 0 > (1 / M) ⁇ p p , and the number of antenna ports used for sending uplink data is greater than or equal to 1 and less than M, based on one or more precodings in the second precoding matrix subset
- M is the number of antenna ports configured by the network device to send the first uplink data, M is an integer greater than 1, and p p is a channel transmission power of the uplink data;
- a sending unit 620 configured to send instruction information used to indicate the first precoding matrix
- the receiving unit 630 is configured to receive the first uplink data.
- the transmit power determined based on each precoding matrix in one or more precoding matrices in the first precoding matrix subset specifically meets the following conditions:
- each precoding matrix in the precoding matrix set includes a phase and amplitude quantization value, where the amplitude quantization value is used to determine transmission power of uplink data, where:
- a phase of each precoding matrix in one or more precoding matrices in the first precoding matrix subset belongs to a phase of a precoding matrix included in the second precoding matrix subset.
- the apparatus for transmitting data in the embodiment of the present application sets a first precoding subset and a second precoding subset in a precoding set, where the precoding matrix is determined based on any one of the precoding matrix subsets.
- the apparatus 600 for transmitting data may correspond to (for example, may be configured on or in itself) the network device described in the foregoing method 200, and each module or unit in the apparatus 600 for transmitting data is respectively configured to execute the network in the above method 200 Each action or process performed by the device is omitted here to avoid detailed description.
- the apparatus 600 may be a network device.
- the apparatus 600 may include a processor, a transmitter, and a receiver, and the processor, the transmitter, and the receiver are communicatively connected.
- the device also includes a memory, and the memory is communicatively connected to the processor.
- the processor, the memory, the transmitter, and the receiver may be communicatively connected.
- the memory may be used to store instructions.
- the processor is configured to execute the instructions stored in the memory to control the transmitter to send information or the receiver to receive signals.
- the processing unit 610 in the apparatus 600 shown in FIG. 8 may correspond to the processor, and the sending unit 620 in the apparatus 600 shown in FIG. 8 may correspond to the transmitter.
- the receiving unit 630 may correspond to a receiver.
- the transmitter and the receiver may be implemented by the same component transceiver.
- the device 600 may be a chip (or a chip system) installed in a network device.
- the device 600 may include a processor and an input / output interface.
- the interface is communicatively connected with the transceiver of the network device.
- the device further includes a memory, and the memory is communicatively connected with the processor.
- the processor, the memory, and the transceiver may be communicatively connected.
- the memory may be used to store instructions.
- the processor is configured to execute the instructions stored in the memory to control the transceiver to send information or signals.
- the processing unit in the device 600 shown in FIG. 8 may correspond to a processor
- the sending unit 620 in the device 600 shown in FIG. 8 may correspond to an output interface
- the receiving unit in the device 600 shown in FIG. 8 630 can correspond to the input interface
- the disclosed systems, devices, and methods may be implemented in other ways.
- the device embodiments described above are only schematic.
- the division of the unit is only a logical function division.
- multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, the indirect coupling or communication connection of the device or unit, and may be electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
- each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
- the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
- the technical solution of this application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product.
- the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.
- the aforementioned storage media include: U disks, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks or compact discs and other media that can store program codes .
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Abstract
Description
比特域索引值 | 部分相干+非相干 |
0 | 1层:TPMI=0 |
1 | 1层:TPMI=1 |
… | … |
3 | 1层:TPMI=3 |
4 | 1层:TPMI=4 |
… | … |
11 | 1层:TPMI=11 |
12 | 1层:TPMI=0(幅度量化值为1) |
13 | 1层:TPMI=1(幅度量化值为1) |
14 | 1层:TPMI=2(幅度量化值为1) |
15 | 1层:TPMI=3(幅度量化值为1) |
Claims (40)
- 一种传输数据的方法,其特征在于,所述方法包括:终端设备确定第一上行数据的信道发送功率;所述终端设备根据所述信道发送功率和传输参数,确定所述第一上行数据的实际发送功率,所述实际发送功率小于或等于所述信道发送功率,其中,所述传输参数包括以下一个或多个:功率余量,所述功率余量表示所述终端设备允许的最大发送功率和所述信道发送功率的差值,所述信道发送功率小于或等于所述终端设备允许的最大发送功率,或,发送所述第一上行数据所采用的波形,或,用于调度所述第一上行数据的下行控制信息DCI格式,或,发送所述第一上行数据所采用的调制和编码方案MCS,或,发送所述第一上行数据的所采用的功率调整取值;所述终端设备使用所述实际发送功率,发送所述第一上行数据。
- 根据权利要求1所述的方法,其特征在于,N小于M,M为网络设备配置的用于发送所述第一上行数据的天线端口的数量,N为M个天线端口中发送所述第一上行数据所采用的非零功率的天线端口的数量,N为大于或等于1的整数,M为大于1的整数。
- 根据权利要求2所述的方法,其特征在于,所述传输参数包括所述功率余量;以及,所述功率余量满足第一条件,所述实际发送功率p t>(N/M)×p p,p p为所述信道发送功率。
- 根据权利要求3所述的方法,其特征在于,所述第一条件为所述功率余量大于或等于第一阈值;以及,在N=1,M=4的情况下,所述第一阈值等于6dBm;或,在N=2,M=4的情况下,所述第一阈值等于3dBm;或,在N=1,M=2的情况下,所述第一阈值等于3dBm。
- 根据权利要求2或3所述的方法,其特征在于,所述传输参数包括所述发送所述第一上行数据所采用的波形;以及,所述波形为离散傅里叶变化扩展正交频分复用多址DFT-s-OFDM波形,所述实际发送功率p t>(N/M)×p p,p p为所述信道发送功率。
- 根据权利要求2至5中任一项所述的方法,其特征在于,所述传输参数包括所述发送所述第一上行数据所采用的下行控制信息DCI格式;以及,所述DCI格式为第一DCI格式,所述实际发送功率p t>(N/M)×p p,所述第一DCI格式为多种用于调度上行数据的DCI格式中包括的比特数最少的DCI格式,p p为所述信道发送功率。
- 根据权利要求2至6中任一项所述的方法,其特征在于,所述传输参数包括所述发送所述第一上行数据所采用的调制和编码方案MCS;以及,所述MCS的调制方式为二进制相移键控BPSK或正交相移键控QPSK,所述实际发 送功率p t>(N/M)×p p,p p为所述信道发送功率。
- 根据权利要求2至7中任一项所述的方法,其特征在于,所述传输参数包括所述发送所述第一上行数据所采用的功率调整取值;以及,所述终端设备K次获得的功率调整取值满足第二条件,所述实际发送功率p t>(N/M)×p p,p p为所述信道发送功率,K为大于或等于1的整数。
- 根据权利要求8所述的方法,其特征在于,所述第二条件为所述终端设备K次获得的功率调整取值大于或等于第二阈值,所述第二阈值等于3dBm。
- 根据权利要求9所述的方法,其特征在于,所述第二条件具体为所述终端设备连续K次获得的功率调整取值都等于所述第二阈值,K为大于1的整数。
- 根据权利要求2至10中任一项所述的方法,其特征在于,所述实际发送功率等于所述信道发送功率。
- 根据权利要求11所述的方法,其特征在于,N=1,所述N个天线端口中一个天线端口的发送功率为p 0=p p;或,N=2,所述N个天线端口中一个天线端口的发送功率为p 0=0.5p p。
- 根据权利要求1至12中任一项所述的方法,其特征在于,所述方法还包括:所述终端设备将所述实际发送功率平均分配给发送所述第一上行数据所采用的N个天线端口。
- 一种传输数据的方法,其特征在于,所述方法包括:网络设备确定第一上行数据的信道发送功率;所述网络设备根据所述信道发送功率和传输参数,确定所述第一上行数据的实际发送功率,所述实际发送功率小于或等于所述信道发送功率,其中,所述传输参数包括以下一个或多个:功率余量,所述功率余量表示所述终端设备允许的最大发送功率和所述信道发送功率的差值,所述信道发送功率小于或等于所述终端设备允许的最大发送功率,或,发送所述第一上行数据所采用的波形,或,用于调度所述第一上行数据的下行控制信息DCI格式,或,发送所述第一上行数据所采用的调制和编码方案MCS,或,发送所述第一上行数据所采用的功率调整取值;所述网络设备接收所述第一上行数据。
- 根据权利要求14所述的方法,其特征在于,N小于M,M为所述网络设备配置的用于发送所述第一上行数据的天线端口的数量,N为M个天线端口中发送所述第一上行数据所采用的非零功率的天线端口的数量,N为大于或等于1的整数,M为大于1的整数。
- 一种传输数据的方法,其特征在于,所述方法包括:终端设备接收指示信息,所述指示信息用于指示发送第一上行数据所采用的第一预编码矩阵,所述第一预编码矩阵属于预编码矩阵集合中的第一预编码矩阵子集或第二预编码矩阵子集,其中,基于所述第一预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵确定的上行数据的发送功率满足以下条件:发送上行数据所采用的天线端口中一个天线端口的发 送功率p 0>(1/M)×p p,并且,所述发送上行数据所采用的天线端口的数量大于或等于1且小于M,基于所述第二预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵确定的上行数据的发送功率满足以下条件:发送上行数据所采用的天线端口中一个天线端口的发送功率p 0=(1/M)×p p,M为网络设备配置的用于发送所述第一上行数据的天线端口的数量,M为大于1的整数,p p为上行数据的信道发送功率;所述终端设备根据所述第一预编码矩阵和所述第一上行数据的信道发送功率,确定所述第一上行数据的实际发送功率,所述实际发送功率小于或等于所述第一上行数据的信道发送功率;所述终端设备使用所述实际发送功率,发送所述第一上行数据。
- 根据权利要求16所述的方法,其特征在于,基于所述第一预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵确定的发送功率具体满足以下条件:所述发送上行数据所采用的天线端口的数量等于1,一个天线端口的发送功率为p 0=p p;或,所述发送上行数据所采用的天线端口的数量等于2,一个天线端口的发送功率为p 0=0.5p p。
- 根据权利要求16或17所述的方法,其特征在于,所述预编码矩阵集合中每个预编码矩阵包括相位和幅度量化值,所述幅度量化值用于确定上行数据的发送功率,其中,所述第一预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵的相位属于所述第二预编码矩阵子集中包括的预编码矩阵的相位。
- 一种传输数据的方法,其特征在于,所述方法包括:网络设备确定对第一上行数据进行预编码的第一预编码矩阵,所述第一预编码矩阵属于预编码矩阵集合中的第一预编码矩阵子集或第二预编码矩阵子集,其中,基于所述第一预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵确定的上行数据的发送功率满足以下条件:发送上行数据所采用的天线端口中一个天线端口的发送功率p 0>(1/M)×p p,并且,所述发送上行数据所采用的天线端口的数量大于或等于1且小于M,基于所述第二预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵确定的上行数据的发送功率满足以下条件:发送上行数据所采用的天线端口中一个天线端口的发送功率p 0=(1/M)×p p,M为网络设备配置的用于发送所述第一上行数据的天线端口的数量,M为大于1的整数,p p为上行数据的信道发送功率;所述网络设备发送用于指示所述第一预编码矩阵的指示信息;所述网络设备接收所述第一上行数据。
- 一种传输数据的装置,其特征在于,所述装置包括:处理单元,用于确定第一上行数据的信道发送功率;所述处理单元还用于,根据所述信道发送功率和传输参数,确定所述第一上行数据的实际发送功率,所述实际发送功率小于或等于所述信道发送功率,其中,所述传输参数包括以下一个或多个:功率余量,所述功率余量表示所述装置允许的最大发送功率和所述信道发送功率的差值,所述信道发送功率小于或等于所述装置允许的最大发送功率,或,发送所述第一上行数据所采用的波形,或,用于调度所述第一上行数据的下行控制信息DCI格式,或,发送所述第一上行数据所采用的调制和编码方案MCS,或,发送所述第一上行数据的所采用的功率调整取值;发送单元,用于使用所述实际发送功率,发送所述第一上行数据。
- 根据权利要求20所述的装置,其特征在于,N小于M,M为网络设备配置的用于发送所述第一上行数据的天线端口的数量,N为M个天线端口中发送所述第一上行数据所采用的非零功率的天线端口的数量,N为大于或等于1的整数,M为大于1的整数。
- 根据权利要求21所述的装置,其特征在于,所述传输参数包括所述功率余量;以及,所述功率余量满足第一条件,所述实际发送功率p t>(N/M)×p p,p p为所述信道发送功率。
- 根据权利要求22所述的装置,其特征在于,所述第一条件为所述功率余量大于或等于第一阈值;以及,在N=1,M=4的情况下,所述第一阈值等于6dBm;或,在N=2,M=4的情况下,所述第一阈值等于3dBm;或,在N=1,M=2的情况下,所述第一阈值等于3dBm。
- 根据权利要求21至23中任一项所述的装置,其特征在于,所述传输参数包括所述发送所述第一上行数据所采用的波形;以及,所述波形为离散傅里叶变化扩展正交频分复用多址DFT-s-OFDM波形,所述实际发送功率p t>(N/M)×p p,p p为所述信道发送功率。
- 根据权利要求21至24中任一项所述的装置,其特征在于,所述传输参数包括所述发送所述第一上行数据所采用的下行控制信息DCI格式;以及,所述DCI格式为第一DCI格式,所述实际发送功率p t>(N/M)×p p,所述第一DCI格式为多种用于调度上行数据的DCI格式中包括的比特数最少的DCI格式,p p为所述信道发送功率。
- 根据权利要求21至25中任一项所述的装置,其特征在于,所述传输参数包括所述发送所述第一上行数据所采用的调制和编码方案MCS;以及,所述MCS的调制方式为二进制相移键控BPSK或正交相移键控QPSK,所述实际发送功率p t>(N/M)×p p,p p为所述信道发送功率。
- 根据权利要求21至26中任一项所述的装置,其特征在于,所述传输参数包括所述发送所述第一上行数据所采用的功率调整取值;以及,所述处理单元K次获得的功率调整取值满足第二条件,所述实际发送功率p t>(N/M)×p p,p p为所述信道发送功率,K为大于或等于1的整数。
- 根据权利要求27所述的装置,其特征在于,所述第二条件为所述处理单元K次获得的功率调整取值大于或等于第二阈值,所述第二阈值等于3dBm。
- 根据权利要求28所述的装置,其特征在于,所述第二条件具体为所述处理单元连续K次获得的功率调整取值都等于所述第二阈值,K为大于1的整数。
- 根据权利要求21至29中任一项所述的装置,其特征在于,所述实际发送功率等于所述信道发送功率。
- 根据权利要求30所述的装置,其特征在于,N=1,所述N个天线端口中一个天线端口的发送功率为p 0=p p;或,N=2,所述N个天线端口中一个天线端口的发送功率为p 0=0.5p p。
- 根据权利要求20至31中任一项所述的装置,其特征在于,所述处理单元还用于:将所述实际发送功率平均分配给发送所述第一上行数据所采用的N个天线端口。
- 一种传输数据的装置,其特征在于,所述装置包括:处理单元,用于确定第一上行数据的信道发送功率;所述处理单元还用于,根据所述信道发送功率和传输参数,确定所述第一上行数据的实际发送功率,所述实际发送功率小于或等于所述信道发送功率,其中,所述传输参数包括以下一个或多个:功率余量,所述功率余量表示终端设备允许的最大发送功率和所述信道发送功率的差值,所述信道发送功率小于或等于所述终端设备允许的最大发送功率,或,发送所述第一上行数据所采用的波形,或,用于调度所述第一上行数据的下行控制信息DCI格式,或,发送所述第一上行数据所采用的调制和编码方案MCS,或,发送所述第一上行数据所采用的功率调整取值;接收单元,用于接收所述第一上行数据。
- 根据权利要求33所述的装置,其特征在于,N小于M,M为网络设备配置的用于发送所述第一上行数据的天线端口的数量,N为M个天线端口中发送所述第一上行数据所采用的非零功率的天线端口的数量,N为大于或等于1的整数,M为大于1的整数。
- 一种传输数据的装置,其特征在于,所述装置包括:接收单元,用于接收指示信息,所述指示信息用于指示发送第一上行数据所采用的第一预编码矩阵,所述第一预编码矩阵属于预编码矩阵集合中的第一预编码矩阵子集或第二预编码矩阵子集,其中,基于所述第一预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵确定的上行数据的发送功率满足以下条件:发送上行数据所采用的天线端口中一个天线端口的发送功率p 0>(1/M)×p p,并且,所述发送上行数据所采用的天线端口的数量大于或等于1且小于M,基于所述第二预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵确定的上行数据的发送功率满足以下条件:发送上行数据所采用的天线端口中一个天线端口的发送功率p 0=(1/M)×p p,M为网络设备配置的用于发送所述第一上行数据的天线端口的数量,M为大于1的整数,p p为上行数据的信道发送功率;处理单元,用于根据所述第一预编码矩阵和所述第一上行数据的信道发送功率,确定所述第一上行数据的实际发送功率,所述实际发送功率小于或等于所述第一上行数据的信道发送功率;发送单元,用于使用所述实际发送功率,发送所述第一上行数据。
- 根据权利要求35所述的装置,其特征在于,基于所述第一预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵确定的发送功率具体满足以下条件:所述发送上行数据所采用的天线端口的数量等于1,一个天线端口的发送功率为p 0=p p;或,所述发送上行数据所采用的天线端口的数量等于2,一个天线端口的发送功率为p 0=0.5p p。
- 根据权利要求35或36所述的装置,其特征在于,所述预编码矩阵集合中每个预编码矩阵包括相位和幅度量化值,所述幅度量化值用于确定上行数据的发送功率,其中,所述第一预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵的相位属于所述第二预编码矩阵子集中包括的预编码矩阵的相位。
- 一种传输数据的装置,其特征在于,所述装置包括:处理单元,用于确定对第一上行数据进行预编码的第一预编码矩阵,所述第一预编码矩阵属于预编码矩阵集合中的第一预编码矩阵子集或第二预编码矩阵子集,其中,基于所述第一预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵确定的上行数据的发送功率满足以下条件:发送上行数据所采用的天线端口中一个天线端口的发送功率p 0>(1/M)×p p,并且,所述发送上行数据所采用的天线端口的数量大于或等于1且小于M,基于所述第二预编码矩阵子集中一个或多个预编码矩阵中的每个预编码矩阵确定的上行数据的发送功率满足以下条件:发送上行数据所采用的天线端口中一个天线端口的发送功率p 0=(1/M)×p p,M为网络设备配置的用于发送所述第一上行数据的天线端口的数量,M为大于1的整数,p p为上行数据的信道发送功率;发送单元,用于发送用于指示所述第一预编码矩阵的指示信息;接收单元,用于接收所述第一上行数据。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有计算机程序,当所述计算机程序在计算机上运行时,使得所述计算机执行如权利要求1至19中任意一项所述的方法。
- 一种芯片系统,其特征在于,所述芯片系统包括:存储器:用于存储指令;处理器,用于从所述存储器中调用并运行所述指令,使得安装有所述芯片系统的通信设备执行如权利要求1至19中任意一项所述的方法。
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JP7319360B2 (ja) | 2023-08-01 |
CN110958699B (zh) | 2022-09-02 |
CN115580327A (zh) | 2023-01-06 |
EP3852464A4 (en) | 2021-11-03 |
CN110958699A (zh) | 2020-04-03 |
EP3852464A1 (en) | 2021-07-21 |
US20210227472A1 (en) | 2021-07-22 |
JP2022501956A (ja) | 2022-01-06 |
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