CN114765482A - Signal transmitting and receiving method and device - Google Patents
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- 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
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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Abstract
The present invention relates to the field of communications technologies, and in particular, to a signal transmitting and receiving method and apparatus, which can transmit a downlink signal in a better modulation and coding manner, thereby improving communication performance. In the method, a network device sends first indication information indicating a first index value to a terminal device, wherein the first index value corresponds to a first MCS and a second MCS, the first MCS and the second MCS belong to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set comprises a modulation order and a target code rate. After receiving the first indication information, the terminal device may determine that the MCS corresponding to the first signal is the first MCS or the second MCS, and then the network device sends the first signal according to the MCS corresponding to the first signal, and the terminal device receives the first signal according to the MCS corresponding to the first signal.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a signal sending method and a signal receiving method and an apparatus.
Background
In order to meet the communication quality of different terminal devices in a communication system, a fifth generation (5th generation, 5G) mobile communication system, that is, a New radio interface (NR) system, supports multiple Modulation Coding Schemes (MCS), where each MCS includes a modulation order, a target code rate, and a spectrum efficiency.
In a semi-persistent scheduling scenario, when performing initial scheduling, a network device transmits scheduling information of a terminal device, such as resource allocation information and MCS index, through a Physical Downlink Control Channel (PDCCH). The terminal equipment receives and recognizes that the current scheduling information is semi-static scheduling information, stores the scheduling information, and then carries out communication based on the stored scheduling information in a period with fixed intervals. In addition, the network device may further configure an overhead through a higher-layer parameter xOverHead to calculate a Transport Block (TB) size, and the MCS configured in the initial scheduling has better performance for the overhead configured through the higher-layer parameter xOverHead.
However, in practical applications, the overhead may change dynamically with time, that is, there may be a case where the overhead of the higher layer parameter configuration is different from the actual overhead, and in this case, the MCS configured in the initial scheduling may not be the better MCS at the current actual overhead.
Disclosure of Invention
The application provides a signal sending and receiving method and device, which can transmit downlink signals in a better modulation coding mode, thereby improving communication performance.
In order to achieve the purpose, the technical scheme is as follows:
in a first aspect, a method for determining a modulation and coding scheme is provided, where the method may be executed by a terminal device, or may be executed by a component of the terminal device, such as a processor, a chip, or a chip system of the terminal device. The method comprises the following steps: the method comprises the steps that terminal equipment receives first indication information from network equipment, wherein the first indication information indicates a first index value, the first index value corresponds to a first Modulation Coding Scheme (MCS) and a second MCS, the first MCS and the second MCS belong to a first modulation coding scheme set, and any MCS in the first modulation coding scheme set comprises a modulation order and a target code rate; the terminal equipment determines that the MCS corresponding to the first signal is the first MCS or the second MCS, and receives the first signal according to the MCS corresponding to the first signal.
Based on the scheme, the first index value indicated by the network device to the terminal device corresponds to two MCSs, and in subsequent downlink transmission, the terminal device can select a better MCS from the two MCSs to receive the first signal according to actual transmission requirements, so that the terminal device uses the better MCS for communication, and communication performance is improved.
In some possible designs, the determining, by the terminal device, the MCS corresponding to the first signal to be the first MCS or the second MCS includes: and the terminal equipment determines that the MCS corresponding to the first signal is a first MCS or a second MCS according to the first overhead value, wherein the first overhead value is the number of Resource Elements (REs) which are not used for bearing the first signal in the time-frequency resource corresponding to the first signal.
Based on the possible design, the terminal device can select the first MCS or the second MCS according to the actual overhead, and compared with the scheme that the terminal device can only adopt one fixed MCS in the prior art, the terminal device can flexibly select a better MCS, so that the communication performance is improved.
In some possible designs, the MCS to which the first signal corresponds is a first MCS if the first overhead value is less than or equal to a first overhead threshold; and under the condition that the first overhead value is greater than the first overhead threshold value, the MCS corresponding to the first signal is a second MCS.
In a second aspect, a method for determining a modulation and coding scheme is provided, where the method may be executed by a network device, or may be executed by a component of the network device, for example, a processor, a chip, or a chip system of the network device. The method comprises the following steps: the method comprises the steps that network equipment sends first indication information to terminal equipment, wherein the first indication information indicates a first index value, the first index value corresponds to a first Modulation Coding Scheme (MCS) and a second MCS, the first MCS and the second MCS belong to a first modulation coding scheme set, and any MCS in the first modulation coding scheme set comprises a modulation order and a target code rate; the network equipment sends a first signal according to the MCS corresponding to the first signal, wherein the MCS corresponding to the first signal is the first MCS or the second MCS.
Based on the scheme, the first index value indicated by the network device to the terminal device corresponds to two MCSs, in subsequent downlink transmission, the network device can select a better MCS from the two MCSs to send the first signal according to actual transmission requirements, and the corresponding terminal device can select a better MCS from the two MCSs to receive the first signal, so that the network device and the terminal device communicate by using the better MCS, and the communication performance is improved.
In combination with the first or second aspect, in some possible designs, the spectral efficiency of the first MCS is equal to the spectral efficiency of the second MCS. Based on this possible design, the present application provides different MCSs with equal spectral efficiency. That is, in the present application, there are different MCSs corresponding to equal spectral efficiencies.
With reference to the first aspect or the second aspect, in some possible designs, the modulation order of the first MCS is 8, and the target code rate is 948/1024; the modulation order of the second MCS is 10, and the target code rate is 758.5/1024; the spectral efficiency of the first MCS and the second MCS is 7.4063;
with reference to the first aspect or the second aspect, in some possible designs, the modulation order of the first MCS is 8, and the target code rate is 916.5/1024; the modulation order of the second MCS is 10, and the target code rate is 733/1024; the spectral efficiency of the first MCS and the second MCS is 7.1602.
In combination with the first or second aspect, in some possible designs, the spectral efficiency of the first MCS is not equal to the spectral efficiency of the second MCS.
With reference to the first aspect or the second aspect, in some possible designs, the modulation order of the first MCS is 8, the target coding rate is 916.5/1024, and the spectral efficiency is 7.4063; the modulation order of the second MCS is 10, the target code rate is 790/1024, and the spectral efficiency is 7.7149.
Based on the possible design, the application provides multiple MCSs, wherein the MCSs comprise MCSs with modulation orders of 10, namely modulation modes of 1024QAM, so that diversity of the MCSs is improved, and more MCS selections are provided for 1024QAM scenes.
In a third aspect, a method for determining a modulation and coding scheme is provided, where the method may be executed by a terminal device, or may also be executed by a component of the terminal device, for example, a processor, a chip, or a chip system of the terminal device. The method comprises the following steps: the method comprises the steps that terminal equipment receives first indication information from network equipment, wherein the first indication information indicates a first Modulation and Coding Scheme (MCS), the first MCS belongs to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set comprises a modulation order and a target code rate; the terminal equipment determines the MCS corresponding to the first signal as the first MCS or the second MCS, and receives the first signal according to the MCS corresponding to the first signal. And the difference value between the index value corresponding to the second MCS and the index value corresponding to the first MCS is a first value, or the spectral efficiency of the second MCS is equal to the spectral efficiency of the first MCS.
Based on the scheme, the network equipment indicates the first MCS to the terminal equipment, and in subsequent downlink transmission, the terminal equipment can select a better MCS from the first MCS and a second MCS which is related to the first MCS to receive the first signal, so that the terminal equipment uses the better MCS for communication, and the communication performance is improved.
In some possible designs, the determining, by the terminal device, the MCS corresponding to the first signal as the first MCS or the second MCS includes: and the terminal equipment determines that the MCS corresponding to the first signal is a first MCS or a second MCS according to the first overhead value, wherein the first overhead value is the number of Resource Elements (REs) which are not used for bearing the first signal in the time-frequency resource corresponding to the first signal.
In some possible designs, the MCS to which the first signal corresponds is a first MCS if the first overhead value is less than or equal to a first overhead threshold; and under the condition that the first overhead value is greater than the first overhead threshold value, the MCS corresponding to the first signal is a second MCS.
In some possible designs, after receiving the first indication information from the network device, the terminal device may determine the first MCS according to the first indication information; alternatively, the first MCS and the second MCS may be determined according to the first indication information.
In some possible designs, the terminal device determines the first MCS according to the first indication information, and if the second MCS is not determined, the terminal device determines the second MCS when the first overhead value is greater than the first overhead threshold.
In a fourth aspect, a method for determining a modulation and coding scheme is provided, where the method may be executed by a network device, or may be executed by a component of the network device, such as a processor, a chip, or a chip system of the network device. The method comprises the following steps: the method comprises the steps that network equipment sends first indication information to terminal equipment, wherein the first indication information indicates a first Modulation and Coding Scheme (MCS), the first MCS belongs to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set comprises a modulation order and a target code rate; the network equipment sends a first signal according to the MCS corresponding to the first signal, wherein the MCS corresponding to the first signal is the first MCS or the second MCS. And the difference value between the index value corresponding to the second MCS and the index value corresponding to the first MCS is a first value, or the spectral efficiency of the second MCS is equal to the spectral efficiency of the first MCS.
Based on the scheme, the network device indicates the first MCS to the terminal device, in subsequent downlink transmission, the network device may select a better MCS from the first MCS and a second MCS associated with the first MCS to transmit the first signal, and the corresponding terminal device may select a better MCS from the two MCSs to receive the first signal, so that the network device and the terminal device communicate using the better MCS, and communication performance is improved.
In combination with the third or fourth aspect, in some possible designs, the spectral efficiency of the first MCS is equal to the spectral efficiency of the second MCS.
With reference to the third aspect or the fourth aspect, in some possible designs, the modulation order of the first MCS is 8, and the target code rate is 948/1024; the modulation order of the second MCS is 10, and the target code rate is 758.5/1024; the spectral efficiency of the first MCS and the second MCS is 7.4063;
with reference to the third aspect or the fourth aspect, in some possible designs, the modulation order of the first MCS is 8, and the target code rate is 916.5/1024; the modulation order of the second MCS is 10, and the target code rate is 733/1024; the spectral efficiency of the first MCS and the second MCS is 7.1602.
In combination with the third or fourth aspect, in some possible designs, the spectral efficiency of the first MCS is not equal to the spectral efficiency of the second MCS.
With reference to the third aspect or the fourth aspect, in some possible designs, the modulation order of the first MCS is 8, the target coding rate is 916.5/1024, and the spectral efficiency is 7.4063; the modulation order of the second MCS is 10, the target code rate is 790/1024, and the spectral efficiency is 7.7149.
In a fifth aspect, a method for determining a modulation and coding scheme is provided, where the method may be executed by a terminal device, or may be executed by a component of the terminal device, such as a processor, a chip, or a chip system of the terminal device. The method comprises the following steps: the terminal equipment receives first indication information and second indication information from the network equipment, wherein the first indication information indicates a first MCS, and the second indication information indicates a second MCS; or the first indication information indicates a first MCS, the second indication information indicates a first difference value, and the first difference value is a difference value between an index value corresponding to the first MCS and an index value corresponding to the second MCS; the terminal equipment determines that the MCS corresponding to the first signal is the first MCS or the second MCS, and receives the first signal according to the MCS corresponding to the first signal.
Based on the scheme, the network equipment sends the first indication information and the second indication information to the terminal equipment, so that the terminal equipment can determine the first MCS and the second MCS according to the first indication information and the second indication information, and in subsequent downlink transmission, the terminal equipment can select a better MCS from the first MCS and the second MCS to receive the first signal, so that the terminal equipment can use the better MCS for communication, and the communication performance is improved.
In some possible designs, the determining, by the terminal device, the MCS corresponding to the first signal to be the first MCS or the second MCS includes: and the terminal equipment determines that the MCS corresponding to the first signal is a first MCS or a second MCS according to the first overhead value, wherein the first overhead value is the number of Resource Elements (REs) which are not used for bearing the first signal in the time-frequency resource corresponding to the first signal.
In some possible designs, the MCS to which the first signal corresponds is a first MCS if the first overhead value is less than or equal to a first overhead threshold; and under the condition that the first overhead value is greater than the first overhead threshold value, the MCS corresponding to the first signal is a second MCS.
In some possible designs, where the first indication information indicates a first MCS and the second indication information indicates a second MCS, the method further comprises: the terminal equipment determines a first MCS according to the first indication information and determines a second MCS according to the second indication information.
In some possible designs, where the first indication information indicates a first MCS and the second indication information indicates a first difference value, the method further comprises: the terminal equipment determines a first MCS according to the first indication information and determines a first difference value according to the second indication information. Further, the terminal device determines an index value corresponding to the second MCS according to the index value corresponding to the first MCS and the first difference, and further determines the second MCS according to the index value corresponding to the second MCS.
A sixth aspect provides a method for determining a modulation and coding scheme, where the method may be executed by a network device, or may be executed by a component of the network device, such as a processor, a chip, or a system-on-chip of the network device. The method comprises the following steps: the network equipment sends first indication information and second indication information to the terminal equipment, wherein the first indication information indicates a first MCS, and the second indication information indicates a second MCS; or the first indication information indicates a first MCS, the second indication information indicates a first difference value, and the first difference value is a difference value between an index value corresponding to the first MCS and an index value corresponding to the second MCS; the network equipment sends a first signal according to the MCS corresponding to the first signal, wherein the MCS corresponding to the first signal is the first MCS or the second MCS.
Based on the scheme, the network device sends the first indication information and the second indication information to the terminal device, so that the terminal device can determine the first MCS and the second MCS according to the first indication information and the second indication information, in subsequent downlink transmission, the network device can select a better MCS from the first MCS and the second MCS to send the first signal, and the corresponding terminal device can select a better MCS from the two MCSs to receive the first signal, so that the network device and the terminal device communicate by using the better MCS, and the communication performance is improved.
In a seventh aspect, a communication device is provided for implementing the various methods described above. The communication device may be the terminal device in the first aspect, the third aspect or the fifth aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip; alternatively, the communication device may be the network device in the second aspect, the fourth aspect or the sixth aspect, or a device including the network device, or a device included in the network device. The communication device includes corresponding modules, units, or means (means) for implementing the above methods, and the modules, units, or means may be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.
In some possible designs, the communication device may include a processing module and a transceiver module. The transceiver module, which may also be referred to as a transceiver unit, is configured to implement the transmitting and/or receiving functions in any of the above aspects and any possible implementation manners. The transceiver module may be formed by a transceiver circuit, a transceiver or a communication interface. The processing module may be configured to implement the processing function in any of the above aspects and any possible implementation manner thereof.
In some possible designs, the transceiver module includes a transmitting module and a receiving module, which are respectively used for implementing the transmitting and receiving functions in any one of the above aspects and any possible implementation manner thereof.
The communication device provided in the seventh aspect is configured to execute any one of the above aspects or any possible implementation manner of any one of the above aspects, and specific details may refer to any one of the above aspects or any possible implementation manner of any one of the above aspects, which are not described herein again.
In an eighth aspect, there is provided a communication apparatus comprising: a processor and a memory; the memory is configured to store computer instructions that, when executed by the processor, cause the communication device to perform the method of any of the above aspects. The communication device may be the terminal device in the first aspect, the third aspect or the fifth aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip; alternatively, the communication device may be the network device in the second aspect, the fourth aspect or the sixth aspect, or a device including the network device, or a device included in the network device.
In a ninth aspect, there is provided a communication apparatus comprising: a processor and a communication interface; the communication interface is used for communicating with a module outside the communication device; the processor is configured to execute a computer program or instructions to cause the communication device to perform the method of any of the above aspects. The communication device may be the terminal device in the first aspect, the third aspect or the fifth aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip; alternatively, the communication device may be the network device in the second aspect, the fourth aspect or the sixth aspect, or a device including the network device, or a device included in the network device.
In a tenth aspect, there is provided a communication apparatus comprising: the interface circuit is used for acquiring input information and/or outputting output information; the logic circuit is configured to perform a method according to any one of the above aspects or any possible implementation manner of any one of the above aspects, process and/or generate output information according to input information. The communication device may be the terminal device in the first aspect, the third aspect, or the fifth aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip; alternatively, the communication device may be the network device in the second aspect, the fourth aspect or the sixth aspect, or a device including the network device, or a device included in the network device.
If the communication device is the terminal device of the first aspect, or a device including the terminal device, or a device included in the terminal device:
in some possible designs, the input information may be: first indication information indicating a first index value, the first index value corresponding to a first MCS and a second MCS. Correspondingly, the processing according to the input information may be: and determining the first MCS and the second MCS according to the first indication information.
In some possible designs, the input information may be: a first signal.
If the communication device is the network device, the device comprising the network device, or the device comprised in the network device of the second aspect:
in some possible designs, the output information may be: first indication information indicating a first index value, the first index value corresponding to a first MCS and a second MCS.
In some possible designs, the output information may be: a first signal.
If the communication device is the terminal device of the third aspect, or a device including the terminal device, or a device included in the terminal device:
in some possible designs, the input information may be: first indication information, the first indication information indicating a first MCS. Correspondingly, the processing according to the input information may be: and determining the first MCS according to the first indication information, or determining the first MCS and the second MCS according to the first indication information.
In some possible designs, the input information may be: a first signal.
If the communication device is the network device, the device including the network device, or the device included in the network device in the fourth aspect:
in some possible designs, the output information may be: first indication information, the first indication information indicating a first MCS.
In some possible designs, the output information may be: a first signal.
If the communication device is the terminal device in the fifth aspect, or a device including the terminal device, or a device included in the terminal device:
in some possible designs, the input information may be: first indication information and second indication information, the first indication information indicating a first MCS and the second indication information indicating a second MCS; alternatively, the first indication information indicates the first MCS, and the second indication information indicates the first difference value. Correspondingly, the processing according to the input information may be: a first MCS is determined according to the first indication information, and a second MCS, or a first difference value, is determined according to the second indication information.
In some possible designs, the input information may be: a first signal.
When the communication device is the network device in the sixth aspect, or a device including the network device, or a device included in the network device:
in some possible designs, the output information may be: first indication information and second indication information, the first indication information indicating a first MCS and the second indication information indicating a second MCS; alternatively, the first indication information indicates the first MCS, and the second indication information indicates the first difference value.
In some possible designs, the output information may be: a first signal.
In an eleventh aspect, there is provided a communication apparatus comprising: at least one processor; the processor is configured to execute a computer program or instructions stored in the memory to cause the communication device to perform the method of any of the above aspects. The memory may be coupled to the processor or may be independent of the processor. The communication device may be the terminal device in the first aspect, the third aspect or the fifth aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip; alternatively, the communication device may be the network device in the second aspect, the fourth aspect or the sixth aspect, or a device including the network device, or a device included in the network device.
In a twelfth aspect, there is provided a computer readable storage medium having stored therein instructions, which when run on a communication device, cause the communication device to perform the method of any of the above aspects.
In a thirteenth aspect, there is provided a computer program product comprising instructions which, when run on a communication apparatus, cause the communication apparatus to perform the method of any of the above aspects.
In a fourteenth aspect, a communication device (which may be a chip or a system of chips, for example) is provided that includes a processor configured to implement the functionality referred to in any of the above aspects.
In some possible designs, the communication device includes a memory for storing necessary program instructions and data.
In some possible designs, the apparatus may be a chip system, and may be composed of a chip, or may include a chip and other discrete devices.
It is to be understood that, when the communication device provided in any one of the fifth to twelfth aspects is a chip, the above-mentioned transmitting operation/function may be understood as outputting information, and the above-mentioned receiving operation/function may be understood as inputting information.
For technical effects brought by any one of the design manners of the seventh aspect to the fourteenth aspect, reference may be made to the technical effects brought by different design manners of the first aspect, the second aspect, the third aspect, the fourth aspect, the fifth aspect, or the sixth aspect, and no further description is provided herein.
A fifteenth aspect provides a communication system comprising the network device of the second aspect and the terminal device of the first aspect; alternatively, the communication system comprises the network device of the fourth aspect and the terminal device of the third aspect; alternatively, the communication system includes the network device according to the fifth aspect and the terminal device according to the sixth aspect.
Drawings
FIG. 1 is a schematic diagram of the amount of overhead provided by the present application;
fig. 2 is a schematic structural diagram of a communication system provided in the present application;
fig. 3 is a schematic structural diagram of a network device and a terminal device provided in the present application;
fig. 4 is a schematic flowchart of a signal transmitting and receiving method provided in the present application;
fig. 5 is a schematic flowchart of another signal transmitting and receiving method provided in the present application;
fig. 6 is a schematic flowchart of another signal transmitting and receiving method provided in the present application;
fig. 7 is a schematic structural diagram of another terminal device provided in the present application;
fig. 8 is a schematic structural diagram of another network device provided in the present application;
fig. 9 is a schematic structural diagram of a communication device provided in the present application.
Detailed Description
To facilitate understanding of the technical solutions of the embodiments of the present application, a brief description of the related art of the present application is first given as follows.
1. Subcarrier, subcarrier spacing:
subcarrier: an Orthogonal Frequency Division Multiplexing (OFDM) system divides a frequency domain resource into a number of sub-resources, and each sub-resource in the frequency domain may be referred to as a sub-carrier. The subcarriers may also be considered as a minimum granularity of frequency domain resources.
Subcarrier spacing: in the OFDM system, the value of the interval between the center positions or peak positions of two subcarriers adjacent in the frequency domain. Illustratively, the subcarrier spacing for Long Term Evolution (LTE) systems is 15 kilohertz (kHz), and the subcarrier spacing for NR systems is 15kHz, 30kHz, 60kHz, 120kHz, 240kHz, or the like.
In the NR system, the subcarrier spacing may be configured by a network device, for example, the subcarrier spacing corresponding to the subcarrier spacing configuration μ -0 is 15kHz, the subcarrier spacing corresponding to the subcarrier spacing configuration μ -1 is 30kHz, the subcarrier spacing corresponding to the subcarrier spacing configuration μ -2 is 60kHz, the subcarrier spacing corresponding to the subcarrier spacing configuration μ -3 is 120kHz, and the subcarrier spacing corresponding to the subcarrier spacing configuration μ -4 is 240 kHz.
2. Resource block, physical resource block, resource element:
resource Block (RB): n subcarriers consecutive in the frequency domain may be referred to as one RB. For example, one RB in LTE and NR systems includes 12 subcarriers. As the communication system evolves, the number of subcarriers included in one RB may be other values.
Physical Resource Block (PRB): PRB may be understood as a physical frequency-domain resource concept employed in frequency-domain resource allocation.
3. OFDM symbol, slot, subframe:
OFDM symbol: the smallest time unit in the time domain in an OFDM system.
Time slot: in the NR system, one slot includes 14 OFDM symbols, and when the subcarrier spacing is 15kHz, the length of one slot is 1 millisecond (ms), and when the subcarrier spacing is 30kHz, the length of one slot is 0.5 ms.
And a subframe: the time length of one subframe in the NR system is 1 ms.
4. Time-frequency resource unit:
the time-frequency resource unit is the smallest resource granularity in the OFDM system, and is an OFDM symbol in the time domain and a subcarrier in the frequency domain.
In addition, the time-frequency resource unit may also be referred to as a Resource Element (RE), and the two may be replaced with each other, which is not specifically limited in the present application.
In a wireless communication system, a network device and a terminal device communicate via a wireless link. The channel state of the wireless link is affected by factors such as the distance between the network device and the terminal device and/or the environment, for example, the channel state may be different for different distances between the network device and the terminal device. When the distance between the network device and the terminal device is short and the shielding object is small, the channel quality between the network device and the terminal device is good, and when the distance between the network device and the terminal device is long and the shielding object is large, the channel quality between the network device and the terminal device is poor.
In order to meet the communication quality of different terminal devices in the system, the NR system supports multiple Modulation Coding Schemes (MCSs), each MCS includes a modulation order, a target code rate, and a spectrum efficiency, and different MCSs are not completely the same. The target code rate is usually expressed as a fraction or fraction, e.g., 1/2, 2/3, etc., greater than 0 and less than 1.
Under a certain target code rate, the larger the modulation order, the higher the spectral efficiency of the system. The modulation scheme can be divided into Quadrature Phase Shift Keying (QPSK) modulation and Quadrature Amplitude Modulation (QAM) from the technical dimension. Further, QAM modulation may be classified into 16QAM, 64QAM, 256QAM, and the like according to a modulation order. In addition, in the NR system, in order to further increase the rate of the central user of the system, 1024QAM standardization is being performed, and by increasing the modulation order, a higher transmission rate is provided for the cell central user or the fixed wireless access user, thereby improving the frequency efficiency.
When the channel quality between the network device and the terminal device is good, the network device usually adopts a relatively high-order modulation mode, such as 64QAM or 256QAM, to send a downlink signal to the terminal device; or, the terminal device transmits the uplink signal to the network device by using a relatively high-order modulation mode, so as to obtain higher spectrum efficiency. When the channel quality between the network device and the terminal device is poor, the network device usually adopts a relatively low-order modulation mode, such as 16QAM or QPSK, to transmit a downlink signal to the terminal device; or, the terminal device transmits the uplink signal to the network device by using a relatively low-order modulation mode, so as to improve the reliability of communication.
At a certain modulation order, the lower the target code rate, the more redundant bits are added during encoding, and the higher the reliability of communication is, but the lower the spectral efficiency is.
When the channel quality between the network device and the terminal device is good, the network device usually sends a downlink signal with a relatively high target code rate; or, the terminal device sends the uplink signal to the network device with a relatively high target code rate, so as to maintain a high spectrum efficiency. When the channel quality between the network device and the terminal device is poor, the network device usually adopts a relatively low target code rate to send a downlink signal to the terminal device; or, the terminal device sends the uplink signal to the network device by using a relatively low target code rate, so as to improve the reliability of communication.
When the network device communicates with the terminal device, the network device may represent different MCS index values through different status values of one indication field, where each MCS index value corresponds to one MSC, and the MSC includes a modulation order, a target code rate, and a spectrum efficiency. That is, the network device may send an indication information to the terminal device, and the indication information may be an MCS index.
It should be noted that "number", "index" and "identifier" related to the present application may be replaced with each other, and are described herein in a unified manner, and the following embodiments are not described again.
After receiving the indication information, the terminal device may determine a modulation order and a target code rate of the corresponding MCS according to the MCS index, determine a Transport Block Size (TBs) according to a Transport Block size calculation formula specified in a third generation partnership project (3 GPP) standard TS38.241, and then receive a downlink signal according to the MCS and the TB size.
Specifically, the TBS is related to a modulation order of the MCS indicated by the network device, a target code rate, a number of scheduled PRBs, and overhead of a higher layer parameter xOverHead configuration. For example, when the modulation order of the MCS, the target code rate, and the number of the scheduled PRBs indicated by the network device are fixed, the lower the overhead of the higher layer parameter configuration, the larger the TBS
The overhead herein may refer to the number of specific REs within one PRB, which are used for carrying a channel state information reference signal (CSI-RS), a phase tracking reference signal (PT-RS), and REs specified in 3GPP standard TS38.241 that cannot be used for a Physical Downlink Shared Channel (PDSCH).
In the above scheme, the terminal device determines the size of the transport block according to the modulation order of the MCS indicated by the network device, the target code rate, the number of the scheduled PRBs, and the overhead configured by the high-level parameter, and when the actual overhead dynamically changes with time, the configured overhead and the actual overhead are not matched, so that the actual code rate of the downlink signal sent by the network device deviates from the target code rate indicated before.
For example, as shown in fig. 1, taking that the indication information sent by the network device to the terminal device before the time slot 1 indicates the modulation order and the target code rate, and the overhead of the high-layer parameter configuration is 0 as an example, in the time slot 1 and the time slot 2, the first two OFDM symbols are used for carrying a Physical Downlink Control Channel (PDCCH), the third OFDM symbol is used for carrying a demodulation reference signal (DMRS), and the overhead is used for carrying an aperiodic CSI-RS. Referring to fig. 1, the actual overhead when the network device performs downlink transmission in slot 1 is 0, the actual overhead when the network device performs downlink transmission in slot 2 is 32, and for the transmission in slot 2, the terminal device determines TBS according to configured overhead 0 (taking TBS equal to N1 as an example), however, if the terminal device determines TBS according to actual overhead 32 (taking TBS equal to N2 as an example), since the actual overhead is greater than the configured overhead, N1 is greater than N2, which results in that the equivalent code rate of actual transmission (N1+ NCRC)/NRE is greater than the target code rate, and the target code rate is similar to (N2+ NCRC)/NRE, where NCRC is the number of cyclic redundancy check bits and NRE is the number of REs actually used for carrying the transport block.
When the actual bitrate is different from the target bitrate, the demodulation performance of the adjacent MCS with different modulation orders in the MCS table entry may be switched, that is, when the configuration overhead is matched (or equal) to the actual overhead, the demodulation performance of MCS1 is better than that of MCS2, and when the configuration overhead is not matched (or equal) to the actual overhead, the demodulation performance of MCS2 is better than that of MCS 1.
In a semi-persistent scheduling scenario, a network device sends scheduling information, such as resource allocation information and an MCS index value, to a terminal device through a Physical Downlink Control Channel (PDCCH) during initial scheduling. And after receiving and identifying that the current scheduling information is semi-static scheduling information, the terminal equipment stores the scheduling information, and then carries out communication according to the stored scheduling information at fixed intervals. If the method is used in a semi-static scheduling scenario, under the condition that overhead dynamically changes with time, the MCS indicated during initial scheduling of the network device may not be the optimal MCS under actual overhead, thereby affecting communication performance.
Based on this, the present application provides a signal transmitting and receiving method, which can transmit downlink signals in a better modulation coding manner, thereby improving communication performance.
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Where in the description of the present application, "/" indicates a relationship where the objects associated before and after are an "or", unless otherwise stated, for example, a/B may indicate a or B; in the present application, "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists singly, A and B exist simultaneously, and B exists singly, wherein A and B can be singular or plural. Also, in the description of the present application, "a plurality" means two or more than two unless otherwise specified. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.
In addition, in order to facilitate clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish identical items or similar items with substantially identical functions and actions. Those skilled in the art will appreciate that the terms "first," "second," and the like do not denote any order or importance, but rather the terms "first," "second," and the like do not denote any order or importance. Also, in the embodiments of the present application, the words "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present relevant concepts in a concrete fashion for ease of understanding.
The embodiment of the application can be applied to an LTE system and an NR system; the present invention is also applicable to other wireless communication systems, such as Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), satellite communication system, non-terrestrial communication network (NTN), internet of things (IoT) system, or future evolution communication system, and the like, which is not limited in this embodiment. The above-mentioned communication system applicable to the present application is only an example, and the communication system applicable to the present application is not limited thereto, and is herein collectively described, and will not be described again. In addition, the term "system" may be used interchangeably with "network".
Fig. 2 shows a communication system 10 according to an embodiment of the present application. The communication system 10 includes at least one network device 20, and one or more terminal devices 30 connected to the network device 20. Alternatively, different terminal devices 30 may communicate with each other.
Taking the example that the network device 20 shown in fig. 2 interacts with any terminal device 30, in this embodiment of the present application, the network device sends first indication information to the terminal device, where the first indication information indicates a first index value, the first index value corresponds to a first MCS and a second MCS, the first MCS and the second MCS belong to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate. Correspondingly, the terminal equipment receives the first indication information from the network equipment. In addition, the network device and the terminal device determine that the MCS corresponding to the first signal is the first MCS or the second MCS, then the network device sends the first signal according to the MCS corresponding to the first signal, and the terminal device receives the first signal according to the MCS corresponding to the first signal.
Based on the scheme, the first index value indicated by the network device to the terminal device corresponds to two MCSs, in subsequent downlink transmission, the network device may select a better MCS from the two MCSs to send the first signal, and the corresponding terminal device may select a better MCS from the two MCSs to receive the first signal, so that the network device and the terminal device communicate by using the better MCS, and communication performance is improved.
Or, taking the example that the network device 20 shown in fig. 2 interacts with any terminal device 30, in this embodiment of the present application, the network device sends first indication information to the terminal device, where the first indication information indicates a first MCS, the first MCS belongs to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate. Correspondingly, the terminal equipment receives the first indication information from the network equipment. In addition, the network device and the terminal device may determine that the MCS corresponding to the first signal is the first MCS or the second MCS, and then the network device transmits the first signal according to the MCS corresponding to the first signal and the terminal device receives the first signal according to the MCS corresponding to the first signal. Wherein, a difference between the index value corresponding to the second MCS and the index value corresponding to the first MCS is a first value, or the spectral efficiency of the second MCS is equal to the spectral efficiency of the first MCS.
Based on the scheme, the network device indicates the first MCS to the terminal device, in subsequent downlink transmission, the network device may select a better MCS from the first MCS and a second MCS associated with the first MCS to transmit the first signal, and the corresponding terminal device may select a better MCS from the two MCSs to receive the first signal, so that the network device and the terminal device communicate using the better MCS, and communication performance is improved.
The specific schemes provided in the present application will be described in detail in the following embodiments, which are not described herein again.
The network device 20 related to the present application is a device that accesses the terminal device 30 to a wireless network, and may be an evolved Node B (eNB or eNodeB) in LTE; or a base station in a 5G network or a Public Land Mobile Network (PLMN) for future evolution, a broadband network service gateway (BNG), a convergence switch, or a non-3 GPP access device; or the network device 20 in this embodiment may also be a wireless controller in a Cloud Radio Access Network (CRAN); or a transmission and reception node (TRP), or a device including the TRP, which is not specifically limited in this embodiment of the present application. Optionally, the base station in the embodiment of the present application may include various forms of base stations, for example: a macro base station, a micro base station (also referred to as a small station), a relay station, an access point, and the like, which are not specifically limited in this embodiment of the present application.
In a possible manner, the network device 20 in the embodiment of the present application may also refer to a Central Unit (CU) or a Distributed Unit (DU), or the network device may also be composed of a CU and a DU. A plurality of DUs can share one CU. One DU may also connect multiple CUs. CUs and DUs can be understood as the division of network devices from a logical functional point of view. The CU and the DU may be physically separated or disposed together, which is not specifically limited in this embodiment of the application. The CU and DU may be connected via an interface, such as an F1 interface. CUs and DUs may be partitioned according to protocol layers of the wireless network. For example, the functions of a Radio Resource Control (RRC) protocol layer, a Service Data Adaptation Protocol (SDAP) protocol layer, and a Packet Data Convergence Protocol (PDCP) protocol layer are provided in the CU, and the functions of a Radio Link Control (RLC) protocol layer, a Medium Access Control (MAC) protocol layer, a Physical (PHY) protocol layer, and the like are provided in the DU.
It is understood that the division of the CU and DU processing functions according to such protocol layers is merely an example, and may be divided in other ways.
For example, a CU or DU may be partitioned to have more protocol layer functionality. For example, a CU or DU may also be divided into partial processing functions with protocol layers. In one design, some of the functions of the RLC layer and the functions of protocol layers above the RLC layer are provided in the CUs, and the remaining functions of the RLC layer and the functions of protocol layers below the RLC layer are provided in the DUs. In another design, the functions of a CU or DU may also be divided according to traffic type or other system requirements. For example, dividing by time delay, setting the function that processing time needs to meet the time delay requirement in DU, and setting the function that does not need to meet the time delay requirement in CU. In another design, a CU may also have one or more functions of the core network. One or more CUs may be centrally located or separately located. For example, the CUs may be located on the network side to facilitate centralized management. The DU may have multiple rf functions, or may have a remote rf function.
In some embodiments, a CU may be composed of a CU control plane (CU-CP) and a CU user plane (CU-UP), which may be understood as a partitioning of a CU from a logical function perspective. The CU-CP and the CU-UP may be divided according to protocol layers of a wireless network, for example, functions of the PDCP protocol layer corresponding to the RRC protocol layer and a Signaling Radio Bearer (SRB) are set in the CU-CP, and a function of the PDCP protocol layer corresponding to a Data Radio Bearer (DRB) is set in the CU-UP. In addition, the functions of the SDAP protocol layer may also be located in the CU-UP.
The terminal device 30 according to the present invention may be a device for implementing a wireless communication function, such as a terminal or a chip that can be used in a terminal. Among them, a terminal may be a User Equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a distant station, a remote terminal, a mobile device, a wireless communication device, a terminal agent, or a terminal device, etc. in an IoT, a 5G network, or a PLMN for future evolution. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, or a wearable device, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The terminal may be mobile or stationary.
In some embodiments, the network device 20 and the terminal device 30 may also be referred to as a communication apparatus, which may be a general-purpose device or a special-purpose device, and this is not particularly limited in this embodiment of the present application.
Fig. 3 is a schematic structural diagram of a network device 20 and a terminal device 30 according to an embodiment of the present application.
The terminal device 30 includes at least one processor (illustrated in fig. 3 by including one processor 301) and at least one transceiver (illustrated in fig. 3 by including one transceiver 303). Further, the terminal device 30 may further include at least one memory (exemplarily illustrated in fig. 3 by including one memory 302), at least one output device (exemplarily illustrated in fig. 3 by including one output device 304) and at least one input device (exemplarily illustrated in fig. 3 by including one input device 305).
The processor 301, the memory 302 and the transceiver 303 are connected by a communication line. The communication link may include a path for transmitting information between the aforementioned components.
The processor 301 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs in accordance with the present disclosure. In a specific implementation, the processor 301 may also include a plurality of CPUs, and the processor 301 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor, as an example. A processor herein may refer to one or more devices, circuits, or processing cores that process data, such as computer program instructions.
The memory 302 may be a device having a storage function. Such as, but not limited to, read-only memory (ROM) or other types of static memory devices that may store static information and instructions, Random Access Memory (RAM) or other types of dynamic memory devices that may store information and instructions, electrically erasable programmable read-only memory (EEPROM), compact disk read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 302 may be separate and coupled to the processor 301 via a communication link. The memory 302 may also be integrated with the processor 301.
The memory 302 is used for storing computer-executable instructions for executing the scheme of the application, and is controlled by the processor 301 to execute. In particular, the processor 301 is configured to execute computer-executable instructions stored in the memory 302, thereby implementing the methods described in the embodiments of the present application.
Alternatively, in the present application, the processor 301 may execute a function related to processing in the signal transmitting and receiving method provided in the present application, and the transceiver 303 is responsible for communication with other devices or a communication network, which is not specifically limited in this embodiment of the present application.
The computer-executable instructions referred to in this application may also be referred to as application program code or computer program code, and the embodiments of the present application are not limited thereto in particular.
The transceiver 303 may use any transceiver or other device for communicating with other devices or communication networks, such as ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), or the like. The transceiver 303 includes a transmitter (Tx) and a receiver (Rx).
The output device 304 is in communication with the processor 301 and may display information in a variety of ways. For example, the output device 304 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like.
The input device 305 is in communication with the processor 301 and may accept user input in a variety of ways. For example, the input device 305 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.
It is to be understood that the structure shown in fig. 3 does not constitute a specific limitation to the terminal device 30 and the network device 20. For example, in other embodiments of the present application, the terminal device 30 and the network device 20 may include more or fewer components than those shown, or some components may be combined, or some components may be split, or a different arrangement of components may be provided. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
The following describes, by taking an example of interaction between the network device 20 and the terminal device 30 shown in fig. 2 and by referring to the accompanying drawings, a method for determining a modulation and coding scheme provided in the embodiment of the present application.
It is understood that, in the embodiments of the present application, a terminal device and/or a network device may perform some or all of the steps in the embodiments of the present application, and these steps or operations are merely examples, and the embodiments of the present application may also perform other operations or various modifications of the operations. Further, the various steps may be performed in a different order presented in the embodiments of the application, and not all operations in the embodiments of the application may be performed.
It can be understood that, in the embodiments of the present application, the interaction between the network device and the terminal device may also be applied to the interaction between the CU and the terminal device, or the interaction between the DU and the terminal device. It can be understood that, in various embodiments of the present application, the interaction mechanism between the network device and the terminal device may be modified appropriately to adapt to the interaction between the CU or the DU and the terminal device.
It should be noted that, in the following embodiments of the present application, names of information among devices or functions or names of parameters in the information are only examples, and other names may also be used in specific implementations, and this is not limited in this embodiment of the present application.
Referring to fig. 4, a signal sending and receiving method provided in the embodiment of the present application includes the following steps:
s401, the network equipment sends first indication information to the terminal equipment. Correspondingly, the terminal equipment receives the first indication information from the network equipment.
The first indication information is used for indicating a first index value, and the first index value corresponds to a first MCS and a second MCS. Further, the first MCS and the second MCS belong to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate, and may further include a spectral efficiency. That is, in the first modulation and coding scheme set, the index value corresponding to the first MCS is the same as the index value corresponding to the second MCS.
It should be noted that "spectral efficiency" in this application may also be referred to as "spectral efficiency", and the two may be replaced with each other; the "index value corresponding to MCS" in the present application may also be referred to as "MCS index value" or "MCS index", which may be replaced with each other, and this is not specifically limited in the present application.
In some embodiments, the first modulation coding scheme set may include a plurality of MCSs with modulation orders of 2, 4, 6, 8, and 10. The modulation modes corresponding to the modulation orders of 2, 4, 6, 8 and 10 are QPSK, 16QAM, 64QAM, 256QAM and 1024QAM respectively.
Alternatively, the first modulation and coding scheme set may be represented by a table, for example, each row in the table is an MCS in the first modulation and coding scheme set, a first column in the table is an index value corresponding to the MCS, a second column is a modulation order of the MCS, a third column is a target code rate of the MCS, and a fourth column is a spectral efficiency of the MCS.
In different implementations of the present application, the spectral efficiencies of the first MCS and the second MCS may be equal or unequal. It should be noted that, regardless of whether the spectral efficiencies of the first MCS and the second MCS are equal, the modulation order of the first MCS is different from the modulation order of the second MCS, for example, the modulation order of the first MCS is greater than the modulation order of the second MCS, or the modulation order of the first MCS is smaller than the modulation order of the second MCS.
In one implementation, the spectral efficiencies of the first MCS and the second MCS are equal. In this implementation, the first MCS and the second MCS may have the following situations:
in case one, the modulation order of the first MCS is 8, and the target code rate is 948/1024; the modulation order of the second MCS is 10, and the target code rate is 758.5/1024; the spectral efficiency of the first MCS and the second MCS is 7.4063.
That is, in the table corresponding to the first modulation and coding scheme set, the MCS index corresponding to the spectral efficiency of 7.463 corresponds to two MCSs, namely, a first MCS with a modulation order of 8 and a target code rate of 948/1024, and a second MCS with a modulation order of 10 and a target code rate of 758.5/1024.
In the present application, the modulation order of the first MCS is 8, and the modulation order of the second MCS is 10 as an example, in practical applications, the modulation order of the first MCS may be a value other than 8, and the modulation order of the second MCS may be a value other than 10, for example, the modulation order of the first MCS is 6, and the modulation order of the second MCS is 8; alternatively, the modulation order of the first MCS is 4 and the modulation order of the second MCS is 6. Accordingly, the code rate of the first MCS and the code rate of the second MCS may also be other values, which is not specifically limited in this application.
Optionally, in this case, in addition to the first MCS and the second MCS, the first modulation and coding scheme set may further include N third MCSs with modulation orders of 10, where N is a positive integer greater than 1.
Optionally, the first modulation and coding scheme set further includes 6 MCSs with modulation orders of 10, and the target code rates corresponding to the 6 MCSs are 790/1024, 822/1024, 853/1024, 885/1024, 916/1026, and 948/1024, respectively.
For example, taking the first modulation order of 10 and N equal to 6 as an example, the target code rates of the 6 third MCSs with modulation orders of 10 included in the first modulation and coding scheme set are respectively: 790/1024, 822/1024, 853/1024, 885/1024, 916/1026, 948/1024; the spectral efficiencies of the 6 third MCSs with modulation order of 10 are: 7.7149, 8.0235, 8.3321, 8.6407, 8.9493, 9.2578.
If the first modulation and coding scheme set is represented by a table, the first modulation and coding scheme set can be shown in table 1 below.
TABLE 1
Illustratively, based on the first modulation and coding scheme set shown in table 1, the first index value indicated by the first indication information is 20.
It should be noted that table 1 only shows, by way of example, modulation orders, target code rates, and spectral efficiencies included in each MCS corresponding to MCS indexes, and the present application does not specifically limit the corresponding relationship between MCS indexes and MCSs, for example, the values of MCS indexes from top to bottom in table 1 may also be decreased, that is, the MCS index corresponding to the MCS in the first row is 31, the MCS index corresponding to the MCS in the second row is 30, and so on, and the MCS index corresponding to the MCS in the last row is 0.
In the following embodiments of the present application, the tables are also only exemplary tables showing modulation orders, target code rates, and spectral efficiencies included in each MCS corresponding to MCS indexes, and the present application does not limit the corresponding relationship between MCS indexes and MCSs, and the following embodiments are not described herein in a unified manner.
In case two, the modulation order of the first MCS is 8, and the target code rate is 916.5/1024; the modulation order of the second MCS is 10, and the target code rate is 733/1024; the spectral efficiency of the first MCS and the second MCS is 7.1602.
That is, in the table corresponding to the first modulation and coding scheme set, the MCS index corresponding to the spectral efficiency of 7.1602 corresponds to two MCSs, namely, a first MCS with a modulation order of 8 and a target code rate of 916.5/1024 and a second MCS with a modulation order of 10 and a target code rate of 733/1024.
Optionally, in this case, in addition to the first MCS and the second MCS, the first modulation and coding scheme set further includes N third MCSs with modulation orders of 10, where N is a positive integer greater than 1.
Optionally, the first modulation and coding scheme set may further include 4 MCSs with modulation order of 10, and target code rates of the 4 MCSs with modulation order of 10 may be 787/1024, 840.5/1024, 894/1024, and 948/1024, respectively; or, the first modulation and coding scheme set may further include 5 MCSs with modulation order of 10, and target code rates of the 5 MCSs with modulation order of 10 may be 776/1024, 819/1024, 862/1024, 905/1024, and 948/1024, respectively; or, the first modulation and coding scheme set may further include 6 MCSs with modulation order of 10, and target code rates of the 6 MCSs with modulation order of 10 may be 912/1024, 876/1024, 840/1024, 862/1024, 905/1024, and 948/1024, respectively; or, the first modulation and coding scheme set may further include 7 MCSs with modulation order of 10, and target code rates of the 7 MCSs with modulation order of 10 may be 733/1024, 790/1024, 822/1024, 853/1024, 885/1024, 916/1026, and 948/1024, respectively.
For example, taking the first modulation order of 10 and N equal to 4 as an example, the target code rates of the 4 third MCSs with the modulation orders of 10 included in the first modulation and coding scheme set are respectively: 787/1024, 840.5/1024, 894/1024, 948/1024; the spectral efficiencies of the 4 third MCSs with modulation orders of 10 are: 7.6846, 8.2090, 8.7334, 9.2578.
If the first modulation and coding scheme set is represented by a table, the first modulation and coding scheme set can be shown in table 2 below. Based on the first modulation and coding scheme set shown in table 2, the first index value indicated by the first indication information is 22.
TABLE 2
| MCS Index (IMCS) | Modulation order (Qm) | Target code rate [/1024] | Spectral efficiency |
| 0 | 2 | 120 | 0.2344 |
| 1 | 2 | 193 | 0.3770 |
| 2 | 2 | 449 | 0.8770 |
| 3 | 4 | 378 | 1.4766 |
| 4 | 4 | 490 | 1.9141 |
| 5 | 4 | 616 | 2.4063 |
| 6 | 4 | 658 | 2.5703 |
| 7 | 6 | 466 | 2.7305 |
| 8 | 6 | 517 | 3.0293 |
| 9 | 6 | 567 | 3.3223 |
| 10 | 6 | 616 | 3.6094 |
| 11 | 6 | 666 | 3.9023 |
| 12 | 6 | 719 | 4.2129 |
| 13 | 6 | 772 | 4.5234 |
| 14 | 6 | 822 | 4.8164 |
| 15 | 6 | 873 | 5.1152 |
| 16 | 8 | 682.5 | 5.3320 |
| 17 | 8 | 711 | 5.5547 |
| 18 | 8 | 754 | 5.8906 |
| 19 | 8 | 797 | 6.2266 |
| 20 | 8 | 841 | 6.5703 |
| 21 | 8 | 885 | 6.9141 |
| 22 | 8/10 | 916.5/733 | 7.1602 |
| 23 | 10 | 787 | 7.6846 |
| 24 | 10 | 840.5 | 8.2090 |
| 25 | 10 | 894 | 8.7334 |
| 26 | 10 | 948 | 9.2578 |
| 27 | 2 | Reservation (reserved) | |
| 28 | 4 | Reservation (reserved) | |
| 29 | 6 | Reservation (reserved) | |
| 30 | 8 | Reservation (reserved) | |
| 31 | 10 | Reservation (reserved) |
For example, taking the first modulation order of 10 and N equal to 5 as an example, the target code rates of the 5 third MCSs with the modulation order of 10 included in the first modulation and coding scheme set are respectively: 776/1024, 819/1024, 862/1024, 905/1024, 948/1024; the spectral efficiencies of the 5 third MCSs with modulation order of 10 are: 776/1024, 819/1024, 862/1024, 905/1024, 948/1024.
If the first modulation and coding scheme set is represented by a table, the first modulation and coding scheme set can be shown in table 3 below. Based on the first modulation and coding scheme set shown in table 3, the first index value indicated by the first indication information is 21.
TABLE 3
| MCS Index (IMCS) | Modulation order (Qm) | Target code rate [/1024] | Spectral efficiency |
| 0 | 2 | 120 | 0.2344 |
| 1 | 2 | 193 | 0.3770 |
| 2 | 2 | 449 | 0.8770 |
| 3 | 4 | 378 | 1.4766 |
| 4 | 4 | 490 | 1.9141 |
| 5 | 4 | 616 | 2.4063 |
| 6 | 6 | 466 | 2.7305 |
| 7 | 6 | 517 | 3.0293 |
| 8 | 6 | 567 | 3.3223 |
| 9 | 6 | 616 | 3.6094 |
| 10 | 6 | 666 | 3.9023 |
| 11 | 6 | 719 | 4.2129 |
| 12 | 6 | 772 | 4.5234 |
| 13 | 6 | 822 | 4.8164 |
| 14 | 6 | 873 | 5.1152 |
| 15 | 8 | 682.5 | 5.3320 |
| 16 | 8 | 711 | 5.5547 |
| 17 | 8 | 754 | 5.8906 |
| 18 | 8 | 797 | 6.2266 |
| 19 | 8 | 841 | 6.5703 |
| 20 | 8 | 885 | 6.9141 |
| 21 | 8/10 | 916.5/733 | 7.1602 |
| 22 | 10 | 776 | 7.5808 |
| 23 | 10 | 819 | 8.0001 |
| 24 | 10 | 862 | 8.4193 |
| 25 | 10 | 905 | 8.8386 |
| 26 | 10 | 948 | 9.2578 |
| 27 | 2 | Reservation (reserved) | |
| 28 | 4 | Reservation (reserved) | |
| 29 | 6 | Reservation (reserved) | |
| 30 | 8 | Reservation (reserved) | |
| 31 | 10 | Reservation (reserved) |
For example, taking the first modulation order of 10 and N equal to 6 as an example, the target code rates of the 6 third MCSs with modulation orders of 10 included in the first modulation and coding scheme set are respectively: 912/1024, 876/1024, 840/1024, 862/1024, 905/1024, 948/1024; the spectral efficiencies of the 6 third MCSs with modulation order of 10 are: 7.5098, 7.8594, 8.2090, 8.5586, 8.9082, 9.2578.
If the first modulation and coding scheme set is represented by a table, the first modulation and coding scheme set can be shown in table 4 below. Based on the first modulation and coding scheme set shown in table 4, the first index value indicated by the first indication information is 20.
TABLE 4
For example, taking the first modulation order of 10 and N equal to 7 as an example, the target code rates of the 6 third MCSs with modulation orders of 10 included in the first modulation and coding scheme set are respectively: 733/1024, 790/1024, 822/1024, 853/1024, 885/1024, 916/1026, 948/1024; the spectral efficiencies of the 7 third MCSs with modulation orders of 10 are: 7.4063, 7.7149, 8.0235, 8.3321, 8.6407, 8.9493, 9.2578.
If the first modulation and coding scheme set is represented by a table, the first modulation and coding scheme set can be shown in table 5 below. Based on the first modulation and coding scheme set shown in table 5, the first index value indicated by the first indication information is 19.
TABLE 5
In another implementation, the spectral efficiencies of the first MCS and the second MCS are not equal. Illustratively, the modulation order of the first MCS is 8, the target coding rate is 916.5/1024, and the spectral efficiency is 7.4063; the modulation order of the second MCS is 10, the target code rate is 790/1024, and the spectral efficiency is 7.7149.
That is, in the first modulation and coding scheme set, the first MCS with the modulation order of 8, the target coding rate of 916.5/1024 and the spectral efficiency of 7.4063 corresponds to the same index as the second MCS with the modulation order of 10, the target code rate of 790/1024 and the spectral efficiency of 7.7149.
Optionally, in this implementation, in addition to the first MCS and the second MCS, the first modulation and coding scheme set further includes M fourth MCSs with modulation orders of 10, where M is a positive integer greater than 1.
Optionally, the first modulation and coding scheme set may further include 5 modulation and coding schemes with a modulation and coding scheme of 10, and target coding rates of the 5 modulation and coding schemes with a modulation order of 10 may be 822/1024, 853/1024, 885/1024, 916/1026, and 948/1024, respectively.
For example, taking the first modulation order of 10 and M equal to 5 as an example, the target code rates of the 5 fourth MCSs with modulation orders of 10 included in the first modulation and coding scheme set are: 822/1024, 853/1024, 885/1024, 916/1024, 948/1024; the spectral efficiencies of the 5 fourth MCSs with modulation order of 10 are: 8.0235, 8.3321, 8.6407, 8.9493, 9.2578.
If the first modulation and coding scheme set is represented by a table, the first modulation and coding scheme set can be shown in table 6 below. Based on the first modulation and coding scheme set shown in table 6, the first index value indicated by the first indication information is 21.
TABLE 6
The first modulation and coding scheme set provided in the present application is introduced above. Next, a manner in which the network device transmits the first indication information will be described.
Optionally, the network device may send Downlink Control Information (DCI) to the terminal device, where the DCI includes the first indication information, or the first indication information is carried in the DCI; or, the network device may send Radio Resource Control (RRC) signaling to the terminal device, where the RRC signaling includes the first indication information, or the first indication information is carried in the RRC signaling; alternatively, the network device may send a media access control control element (MAC-CE) to the terminal device, where the MAC-CE includes the first indication information, or the first indication information is carried in the MAC-CE.
Optionally, the first indication information may be sent to the terminal device when the network device performs initial scheduling in a semi-static scheduling scenario; or, the first indication information may also be sent by the network device to the terminal device before sending the downlink signal in a non-semi-static scheduling (or called dynamic scheduling) scenario, which is not specifically limited in this application.
Optionally, in the semi-persistent scheduling scenario, after receiving the first indication information, the terminal device may determine the first MCS and the second MCS according to the first indication information, and store the first MCS and the second MCS, so as to be used in the subsequent downlink communication process.
S402, the network equipment determines the MCS corresponding to the first signal as a first MCS or a second MCS.
The first signal is a downlink signal to be sent by the network device, or in other words, a downlink signal to be received by the terminal device. The first signal related to the present application may also be understood as the first PDSCH, and the two may be replaced with each other, which is not specifically limited in the present application.
Optionally, the network device may determine, according to the first overhead value, that the MCS corresponding to the first signal is the first MCS or the second MCS.
The first overhead value is the number of resource elements RE that are not used for bearing the first signal in the time-frequency resource corresponding to the first signal, or in other words, the first overhead value is the number of RE except for the first time-frequency resource in the time-frequency resource corresponding to the first signal, and the first time-frequency resource is the time-frequency resource used for bearing the first signal. That is, the time-frequency resource corresponding to the first signal includes the first time-frequency resource and the REs that are not used for carrying the first signal. For example, the time-frequency resource corresponding to the first signal may be a PRB including time-frequency resources used for carrying the first signal and REs not used for carrying the first signal.
Optionally, the REs that are not used for carrying the first signal in the time-frequency resources corresponding to the first signal, or the REs except for the first time-frequency resources in the time-frequency resources corresponding to the first signal may be REs used for carrying CSI-RS, REs used for carrying zero-power CSI-RS, REs used for carrying PT-RS, and REs that cannot be used for PDSCH and are specified in 3GPP standard TS 38.214.
Optionally, when the modulation order corresponding to the second MCS is greater than the modulation order corresponding to the first MCS, the network device determines, according to the first overhead value, that the MCS corresponding to the first signal is the first MCS or the second MCS, which may include: under the condition that the first overhead value is smaller than or equal to a first overhead threshold value, the network equipment determines the MCS corresponding to the first signal as a first MCS; and under the condition that the first overhead value is larger than the first overhead threshold value, the network equipment determines the MCS corresponding to the first signal as a second MCS.
When the modulation order corresponding to the second MCS is smaller than the modulation order corresponding to the first MCS, the determining, by the network device according to the first overhead value, that the MCS corresponding to the first signal is the first MCS or the second MCS may include: under the condition that the first overhead value is larger than a first overhead threshold value, the network equipment determines the MCS corresponding to the first signal as a first MCS; and under the condition that the first overhead value is less than or equal to the first overhead threshold value, the network equipment determines the MCS corresponding to the first signal as a second MCS.
That is to say, before the network device sends the first signal, the network device may compare the number of REs that are not used for carrying the first signal in the time-frequency resource corresponding to the first signal with the first overhead threshold, so as to determine, according to the comparison result, that the MCS corresponding to the first signal is the first MCS or the second MCS.
Optionally, the first overhead threshold may be predefined by a protocol, or may be autonomously determined by a network device, which is not specifically limited in this application.
In the present application, the execution order of step S401 and step S402 is not limited. For example, in a semi-persistent scheduling scenario, the step S401 is executed first, and then the step S402 is executed. In a non-semi-persistent scheduling scenario, step S401 may be executed first, and then step S402 may be executed; alternatively, step S402 may be executed first, and then step S401 may be executed; alternatively, step S401 and step S402 may be performed simultaneously.
S403, the terminal device determines that the MCS corresponding to the first signal is the first MCS or the second MCS.
In different implementations of the present application, the terminal device may determine, in different manners, that the MCS corresponding to the first signal is the first MCS or the second MCS.
In one implementation, the terminal device may determine, according to the first overhead value, that the MCS corresponding to the first signal is the first MCS or the second MCS.
Optionally, in a scenario where the modulation order corresponding to the second MCS is greater than the modulation order corresponding to the first MCS, under a condition that the first overhead value is less than or equal to the first overhead threshold, the MCS corresponding to the first signal is the first MCS; and under the condition that the first overhead value is greater than the first overhead threshold value, the MCS corresponding to the first signal is a second MCS.
In a scenario that the modulation order corresponding to the second MCS is smaller than the modulation order corresponding to the first MCS, the MCS corresponding to the first signal is the first MCS when the first overhead value is greater than the first overhead threshold value; and under the condition that the first overhead value is less than or equal to the first overhead threshold value, the MCS corresponding to the first signal is a second MCS.
Optionally, when the first overhead threshold is determined by the network device, before step S403, the network device further sends second indication information to the terminal device, where the second indication information indicates the first overhead threshold. Correspondingly, the terminal device receives second indication information from the network device, and determines the first overhead threshold according to the second indication information.
Optionally, the sending, by the network device, the second indication information to the terminal device may include: and the network equipment sends RRC signaling to the terminal equipment, wherein the RRC signaling comprises second indication information, or the second indication information is borne in the RRC signaling.
In another implementation manner, the terminal device may determine, according to a Radio Network Temporary Identifier (RNTI) scrambled by the first indication information, that the MCS corresponding to the first signal is the first MCS or the second MCS.
Optionally, if step S402 is executed first and then step S401 is executed, when the network device determines that the MCS corresponding to the first signal is the first MCS in step S402, and sends the first indication information to the terminal device in step S401, the first indication information may be scrambled by the first RNTI; when the network device determines that the MCS corresponding to the first signal is the second MCS in step S402, the network device may scramble the first indication information with the second RNTI when transmitting the first indication information to the terminal device in step S401.
Based on this, when the terminal equipment receives the first indication information, if the first indication information is scrambled by the first RNTI, the MCS corresponding to the first signal is determined to be the first MCS; and if the first indication information is scrambled by the second RNTI, determining that the MCS corresponding to the first signal is the second MCS.
It should be noted that, in this implementation, the network device and the terminal device may agree in advance that the first RNTI is associated with the first MCS, and the second RNTI is associated with the second MCS.
In still another implementation manner, the terminal device may determine, according to the third indication information, that the MCS corresponding to the first signal is the first MCS or the second MCS.
Optionally, before this step S403, the network device may send third indication information to the terminal device, where the third indication information indicates that the MCS corresponding to the first signal is the first MCS or the second MCS. Accordingly, the terminal device may receive the third indication information from the network device, and determine the MCS corresponding to the first signal as the first MCS or the second MCS according to the third indication information. For example, when the third indication information indicates that the MCS corresponding to the first signal is the first MCS, the terminal device determines that the MCS corresponding to the first signal is the first MCS, and when the third indication information indicates that the MCS corresponding to the first signal is the second MCS, the terminal device determines that the MCS corresponding to the first signal is the second MCS.
Optionally, the third indication information and the first indication information may be carried in the same signaling or may be carried in different signaling, which is not specifically limited in this application.
Optionally, the third indication may be represented by a field with 1 bit, where when a value of the bit is 1, the MCS corresponding to the first MCS is indicated as the first MCS, and when the value of the bit is 0, the MCS corresponding to the first MCS is indicated as the second MCS; or when the value of the bit is 0, indicating that the MCS corresponding to the first MCS is the first MCS, and when the value of the bit is 1, indicating that the MCS corresponding to the first MCS is the second MCS.
S404, the network equipment sends the first signal according to the MCS corresponding to the first signal. Correspondingly, the terminal equipment receives the first signal according to the MCS corresponding to the first signal.
Optionally, the sending, by the network device, the first signal according to the MCS corresponding to the first signal may include: and the network equipment transmits the coded and modulated first signal after coding and modulating the first signal by using the MCS corresponding to the first signal. The terminal device receives the first signal according to the MCS corresponding to the first signal, and may include: and the terminal equipment demodulates and decodes the first signal after the coding modulation by using the MCS corresponding to the first signal to obtain the first signal.
In the method described in steps S403 and S404, for the terminal device, the terminal device determines an MCS, and then receives the first signal according to the determined MCS. In addition, the terminal device may not perform step S403, and in step S404, the terminal device may first randomly select one of the first MCS and the second MCS to demodulate and decode the first signal after code modulation, and if the demodulation and decoding fails, demodulate and decode the first signal after code modulation according to the other MCS; and if the demodulation and the decoding are successful, carrying out subsequent service processing according to the first signal.
Based on the scheme shown in fig. 4, the first index value indicated by the network device to the terminal device corresponds to two MCSs, in subsequent downlink transmission, the network device may select a better MCS from the two MCSs to transmit the first signal, and the corresponding terminal device may select a better MCS from the two MCSs to receive the first signal, so that the network device and the terminal device communicate using the better MCS, and the communication performance is improved.
In the scheme shown in fig. 4, the selection of MCS is implemented by using one index value corresponding to two MCSs, and the present application also provides another method, in which one index value corresponding to one MCS determines another MCS according to the one MCS, and selects a scheme among the two MCSs.
As shown in fig. 5, another signal transmitting and receiving method provided by the present application includes the following steps:
s501, the network equipment sends first indication information to the terminal equipment. Correspondingly, the terminal equipment receives the first indication information from the network equipment.
The first indication information indicates a first MCS, the first MCS belongs to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set comprises a modulation order and a target code rate. In the first modulation and coding scheme set, one index value corresponds to one MCS, and different index values correspond to different MCSs.
Alternatively, in the method shown in fig. 5, the first modulation and coding scheme set may have two forms:
in one possible form, the first modulation and coding scheme set does not include an MCS with the same spectral efficiency, that is, the first modulation and coding scheme set is different from the first modulation and coding scheme set of the scheme shown in fig. 4.
In another possible form, the first modulation and coding scheme set may include multiple MCSs with the same spectral efficiency, and the multiple MCSs with the same spectral efficiency correspond to different index values. For example, the first modulation and coding scheme set may include one or more MCSs with the same spectral efficiency as the first MCS, and the index values corresponding to the one or more MCSs are different from each other and different from each other.
Optionally, after receiving the first indication information, the terminal device may determine the first MCS according to the first indication information. For example, when the first indication information is an index value corresponding to the first MCS, the terminal device may search for the index value corresponding to the first MCS in the first modulation and coding scheme set, and determine the modulation order, the target code rate, and the spectral efficiency corresponding to the index value as the modulation order, the target code rate, and the spectral efficiency of the first MCS.
Optionally, the manner in which the network device sends the first indication information to the terminal device may refer to the relevant description in step S401, and is not described herein again.
Optionally, the first indication information may be sent to the terminal device when the network device performs initial scheduling in a semi-static scheduling scenario; or, the first indication information may also be sent by the network device to the terminal device before sending the downlink signal in a non-semi-static scheduling (or called dynamic scheduling) scenario, which is not specifically limited in this application.
Optionally, in a semi-persistent scheduling scenario, after determining the first MCS according to the first indication information, the terminal device may store the first MCS for subsequent use in a downlink communication process.
S502, the network equipment determines that the MCS corresponding to the first signal is the first MCS or the second MCS.
Optionally, the network device may determine, by using the first overhead value, that the MCS corresponding to the first signal is the first MCS or the second MCS, refer to the relevant description in step S402, which is not described herein again.
In the present application, the execution order of step S501 and step S502 is not limited. For example, in a semi-persistent scheduling scenario, the step S501 may be performed first, and then the step S502 may be performed. In a non-semi-static scheduling scenario, step S501 may be executed first, and then step S502 may be executed; alternatively, step S502 may be executed first, and then step S501 may be executed; alternatively, step S501 and step S502 may be performed simultaneously.
S503, the terminal equipment determines that the MCS corresponding to the first signal is the first MCS or the second MCS.
Optionally, the terminal device may determine an MCS corresponding to the first signal according to the first overhead value. That is, the terminal device may first determine the first overhead value, and determine the MCS corresponding to the first signal as the first MCS or the second MCS according to a comparison result between the first overhead value and the first overhead threshold.
Optionally, the terminal device may determine that the MCS corresponding to the first signal is the first MCS when the first overhead value is less than or equal to the first overhead threshold; the terminal device may determine that the MCS corresponding to the first signal is the second MCS when the first overhead value is greater than the first overhead threshold.
Optionally, the first MCS may be an MCS with a highest target code rate in a modulation and coding scheme with a modulation order of 8 in the first modulation and coding set. Or, the first MCS may be an MCS with a highest target code rate in all modulation and coding schemes corresponding to any modulation order in the first modulation and coding set.
In a possible implementation manner, the index value corresponding to the second MCS is a sum of the index value corresponding to the first MCS and the first value. That is, the difference obtained by subtracting the index value corresponding to the first MCS from the index value corresponding to the second MCS is the first value. That is, when determining that the first overhead value is greater than the first overhead threshold, the terminal device may determine an index value corresponding to the second MCS according to the index value corresponding to the first MCS and the first value, and further determine the second MCS according to the index value corresponding to the second MCS.
Optionally, the first value may be a preset value, or may be a value sent by the network device to the terminal device, or may be a value predefined by a protocol, which is not specifically limited in this application. Illustratively, the first value may be-1, or another value.
In another possible implementation manner, when the first modulation and coding scheme set includes a plurality of MCSs with the same spectral efficiency, and the plurality of MCSs with the same spectral efficiency correspond to different index values, the second MCS is an MCS with a spectral efficiency equal to that of the first MCS in the first modulation and coding scheme set, that is, the spectral efficiency of the second MCS is equal to that of the first MCS. And the modulation order of the second MCS is larger than that of the first MCS. That is, the terminal device may determine the second MCS from the first MCS upon determining that the first overhead value is greater than the first overhead threshold.
Optionally, under the condition that the spectral efficiency of the second MCS is equal to the spectral efficiency of the first MCS, a difference between the index value corresponding to the second MCS and the index value corresponding to the first MCS may be a first value or other values, which is not specifically limited in the present application.
Optionally, the modulation order of the first MCS is 8, and the target code rate is 948/1024; the modulation order of the second MCS is 10, and the target code rate is 758.5/1024; the spectral efficiency of the first MCS and the second MCS is 7.4063. Or, the modulation order of the first MCS is 8, and the target code rate is 916.5/1024; the modulation order of the second MCS is 10, and the target code rate is 733/1024; the spectral efficiency of the first MCS and the second MCS is 7.1602.
S504, the network equipment sends the first signal according to the MCS corresponding to the first signal. Correspondingly, the terminal equipment receives the first signal according to the MCS corresponding to the first signal.
Optionally, the description of the actions of the network device and the terminal device may refer to the relevant description in step S404, which is not described herein again.
Similar to the scheme shown in fig. 4, in the method described in step S503 and step S504, for the terminal equipment, the terminal equipment determines an MCS, and then receives the first signal according to the determined MCS. In addition, the terminal device may not perform step S503, and in step S504, the terminal device may first randomly select one of the first MCS and the second MCS to demodulate and decode the first signal after code modulation, and if the demodulation and decoding fails, demodulate and decode the first signal after code modulation according to the other MCS; and if the demodulation and the decoding are successful, carrying out subsequent service processing according to the first signal.
Based on the scheme, the network device indicates the first MCS to the terminal device, in subsequent downlink transmission, the network device may select a better MCS from the first MCS and a second MCS associated with the first MCS to transmit the first signal, and the corresponding terminal device may select a better MCS from the two MCSs to receive the first signal, so that the network device and the terminal device communicate using the better MCS, and communication performance is improved.
In addition to the methods shown in fig. 4 and 5, the present application provides another signal transmission and reception method, as shown in fig. 6, including the following steps:
s601, the network equipment sends the first indication information and the second indication information to the terminal equipment. Correspondingly, the terminal equipment receives the first indication information and the second indication information from the network equipment.
In one implementation, the first indication information indicates a first MCS and the second indication information indicates a second MCS. For example, the first indication information may be an index value corresponding to the first MCS, and the second indication information may be an index value corresponding to the second MCS.
In another implementation, the first indication information indicates a first MCS, and the second indication information indicates a first difference value, where the first difference value is a difference value between an index value corresponding to the first MCS and an index value corresponding to the second MCS. For example, the first indication information may be an index value corresponding to the first MCS, and the second indication information may be a first difference value.
The first MCS and the second MCS belong to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set comprises a modulation order and a target code rate. For a detailed description of the first modulation and coding scheme set, reference may be made to the related description in step S401, and details are not repeated here.
Optionally, the first MCS may be an MCS with a highest target code rate in the modulation and coding schemes with the modulation order of 8 in the first modulation and coding scheme set. Or, the first MCS may be a modulation and coding scheme with a highest code rate among all modulation and coding schemes corresponding to any modulation order in the first modulation and coding scheme set.
Optionally, the first modulation and coding scheme set may further include N third MCSs or M fourth MCSs in addition to the first MCS and the second MCS, which refer to the related description in step S401 and are not described herein again.
Optionally, the first indication information and the second indication information may be carried in the same signaling or may be carried in different signaling, which is not specifically limited in this application.
Optionally, the signaling carrying the first indication information or the second indication information may be DCI, or RRC signaling, or MAC CE, and reference may be made to the related description in step S401, which is not described herein again.
Optionally, the first indication information and the second indication information may be sent to the terminal device when the network device performs initial scheduling in a semi-static scheduling scenario; alternatively, the first indication information may also be sent by the network device to the terminal device before sending the downlink signal in a non-semi-persistent scheduling scenario, which is not specifically limited in this application.
Optionally, after receiving the first indication information and the second indication information, the terminal device may determine the first MCS according to the first indication information and determine the second MCS according to the second indication information under the condition that the second indication information indicates the second MCS. In a case where the second indication information indicates the first difference value, the terminal device may determine the first MCS according to the first indication information and determine the first difference value according to the second indication information; alternatively, the terminal device may determine the first MCS according to the first indication information, determine the first difference value according to the second indication information, determine the index value corresponding to the second MCS according to the first difference value and the index value corresponding to the first MCS, and determine the second MCS according to the index value corresponding to the second MCS.
S602, the network device determines that the MCS corresponding to the first signal is the first MCS or the second MCS.
Optionally, the network device may determine, by using the first overhead value, that the MCS corresponding to the first signal is the first MCS or the second MCS, refer to the relevant description in step S402, which is not described herein again.
In the present application, the execution order of step S601 and step S602 is not limited. For example, in a semi-persistent scheduling scenario, the step S601 may be executed first, and then the step S602 is executed. In the non-semi-persistent scheduling scenario, step S601 may be executed first, and then step S602 may be executed; alternatively, step S602 may be executed first, and then step S601 may be executed; alternatively, step S601 and step S602 may be performed simultaneously.
S603, the terminal equipment determines that the MCS corresponding to the first signal is the first MCS or the second MCS.
Optionally, the terminal device may determine, in different manners, that the MCS corresponding to the first signal is the first MCS or the second MCS, refer to the relevant description in step S403, which is not described herein again.
Optionally, in step S601, the second indication information indicates the first difference, and if the terminal device determines that the MCS corresponding to the first signal is the second MCS under the condition that the terminal device determines the first MCS and the first difference according to the first indication information and the second indication information, in step S603, the terminal device may further determine an index value corresponding to the second MCS according to the index value corresponding to the first MCS and the first difference, and determine the second MCS according to the index value corresponding to the second MCS.
S604, the network equipment sends the first signal according to the MCS corresponding to the first signal. Correspondingly, the terminal equipment receives the first signal according to the MCS corresponding to the first signal.
Optionally, the description of the actions of the network device and the terminal device may refer to the relevant description in step S404, which is not described herein again.
Similar to the scheme shown in fig. 4, in the method described in step S603 and step S604, for the terminal device, the terminal device determines an MCS, and then receives the first signal according to the determined MCS. In addition, the terminal device may not perform step S603, and in step S604, the terminal device may first randomly select one of the first MCS and the second MCS to demodulate and decode the first signal after code modulation, and if the demodulation and decoding fails, demodulate and decode the first signal after code modulation according to the other MCS; and if the demodulation and the decoding are successful, carrying out subsequent service processing according to the first signal.
Based on the scheme, the network device sends the first indication information and the second indication information to the terminal device, so that the terminal device can determine the first MCS and the second MCS according to the first indication information and the second indication information, in subsequent downlink transmission, the network device can select a better MCS from the first MCS and the second MCS to send a first signal, and the corresponding terminal device can select a better MCS from the two MCSs to receive the first signal, so that the network device and the terminal device communicate by using the better MCS, and the communication performance is improved.
In the embodiments shown in fig. 4 to 6, the processor 201 in the network device 20 shown in fig. 3 may call the application program code stored in the memory 202 to instruct the network device to execute the actions of the network device; in the embodiments shown in fig. 4 to fig. 6, the processor 301 in the terminal device 30 shown in fig. 3 may call the application program code stored in the memory 302 to instruct the terminal device to perform the actions of the terminal device, which is not limited in this embodiment.
In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.
It is to be understood that, in the above embodiments, the method and/or the steps implemented by the terminal device may also be implemented by a component (e.g., a chip or a circuit) applicable to the terminal device; the methods and/or steps implemented by the network device may also be implemented by components (e.g., chips or circuits) that may be used in the network device.
The above description mainly introduces the scheme provided by the present application from the perspective of interaction between various devices. Correspondingly, the application also provides a communication device which is used for realizing the various methods. The communication device may be the terminal device in the above method embodiment, or a device including the above terminal device, or a component that can be used for the terminal device.
It is to be understood that the communication device comprises corresponding hardware structures and/or software modules for performing the respective functions in order to realize the above-mentioned functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed in hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, the communication apparatus may be divided into functional modules according to the method embodiments, for example, each functional module may be divided according to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
Taking a communication device as an example of the terminal device in the foregoing method embodiments, fig. 7 shows a schematic structural diagram of a terminal device 70. The terminal device 70 comprises a processing module 701 and a transceiver module 702.
In some embodiments, the terminal device 70 may also include a memory module (not shown in FIG. 7) for storing program instructions and data.
In some embodiments, the transceiver module 702, which may also be referred to as a transceiver unit, is used to implement transmitting and/or receiving functions. The transceiver module 702 may be formed by a transceiver circuit, a transceiver, or a communication interface.
In some embodiments, the transceiver module 702 may include a receiving module and a transmitting module for performing the steps of the receiving and transmitting classes performed by the terminal device in the above method embodiments, respectively, and/or other processes for supporting the techniques described herein; the processing module 701 may be configured to perform the steps of processing classes (e.g., determining, obtaining, etc.) performed by the terminal device in the above method embodiments, and/or other processes for supporting the techniques described herein.
In one implementation scenario:
a transceiver module 702, configured to receive first indication information from a network device, where the first indication information indicates a first index value, the first index value corresponds to a first modulation and coding scheme MCS and a second MCS, the first MCS and the second MCS belong to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate; a processing module 701, configured to determine that the MCS corresponding to the first signal is a first MCS or a second MCS; the transceiver module 702 is further configured to receive the first signal according to the MCS corresponding to the first signal.
In another implementation scenario:
a transceiver module 702, configured to receive first indication information from a network device, where the first indication information indicates a first modulation and coding scheme MCS, and the first MCS belongs to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate; a processing module 701, configured to determine that the MCS corresponding to the first signal is a first MCS or a second MCS, and a difference between an index value corresponding to the second MCS and an index value corresponding to the first MCS is a first value, or a spectral efficiency of the second MCS is equal to a spectral efficiency of the first MCS; the transceiver module 702 is configured to receive a first signal according to the MCS corresponding to the first signal.
In yet another implementation scenario:
a transceiving module 702, configured to receive first indication information and second indication information from a network device, where the first indication information indicates a first MCS, and the second indication information indicates a second MCS; or the first indication information indicates a first MCS, the second indication information indicates a first difference value, and the first difference value is a difference value between an index value corresponding to the first MCS and an index value corresponding to the second MCS; a processing module 701, configured to determine that an MCS corresponding to the first signal is a first MCS or a second MCS; the transceiver module 702 is further configured to receive the first signal according to the MCS corresponding to the first signal.
In the foregoing three implementation scenarios, as a possible implementation manner, the determining, by the processing module, that the MCS corresponding to the first signal is the first MCS or the second MCS includes: the processing module is configured to determine, according to a first overhead value, that the MCS corresponding to the first signal is the first MCS or the second MCS, where the first overhead value is the number of resource elements, REs, that are not used for carrying the first signal in time-frequency resources corresponding to the first signal.
All relevant contents of the steps related to the method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.
In the present application, the terminal device 70 is presented in the form of dividing each functional module in an integrated manner. As used herein, a module may refer to a specific application-specific integrated circuit (ASIC), an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that provide the described functionality.
In some embodiments, in terms of hardware implementation, those skilled in the art may appreciate that the terminal device 70 may take the form of the terminal device 30 shown in fig. 3.
As an example, the function/implementation procedure of the processing module 701 in fig. 7 may be implemented by the processor 301 in the terminal device 30 shown in fig. 3 calling a computer executing instruction stored in the memory 302, and the function/implementation procedure of the transceiver module 702 in fig. 7 may be implemented by the transceiver 303 in the terminal device 30 shown in fig. 3.
In some embodiments, when the terminal device 70 in fig. 7 is a chip or a chip system, the functions/implementation processes of the transceiver module 702 may be implemented by an input/output interface (or a communication interface) of the chip or the chip system, and the functions/implementation processes of the processing module 701 may be implemented by a processor (or a processing circuit) of the chip or the chip system.
Since the terminal device 70 provided in this embodiment can execute the signal sending and receiving method, the technical effect obtained by the terminal device 70 can refer to the method embodiment, and is not described herein again.
Taking a communication device as an example of the network device in the foregoing method embodiments, fig. 8 shows a schematic structural diagram of a network device 80. The network device 80 comprises a processing module 801 and a transceiver module 802.
In some embodiments, the network device 80 may also include a storage module (not shown in FIG. 8) for storing program instructions and data.
In some embodiments, the transceiver module 802, which may also be referred to as a transceiver unit, is used to implement transmitting and/or receiving functions. The transceiver module 802 may be formed by a transceiver circuit, a transceiver, or a communication interface.
In some embodiments, the transceiver module 802, which may include a receiving module and a transmitting module, is configured to perform the steps of the receiving and transmitting classes performed by the network device in the above method embodiments, respectively, and/or other processes for supporting the techniques described herein; processing module 801 may be used to perform the steps of processing classes (e.g., determining, obtaining, etc.) performed by network devices in the above-described method embodiments, and/or other processes for supporting the techniques described herein.
In one implementation scenario:
a processing module 801, configured to generate first indication information; a transceiver module 802, configured to send first indication information to a terminal device, where the first indication information indicates a first index value, the first index value corresponds to a first modulation and coding scheme MCS and a second MCS, the first MCS and the second MCS belong to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate; the transceiver module 802 is further configured to send a first signal according to the MCS corresponding to the first signal, where the MCS corresponding to the first signal is the first MCS or the second MCS.
In another implementation scenario:
a processing module 801, configured to generate first indication information; a transceiver module 802, configured to send first indication information to a terminal device, where the first indication information indicates a first modulation and coding scheme MCS, and the first MCS belongs to a first modulation and coding scheme set, where any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate; the transceiving module 802 is further configured to send a first signal according to an MCS corresponding to the first signal, where the MCS corresponding to the first signal is a first MCS or a second MCS, and a difference between an index value corresponding to the second MCS and an index value corresponding to the first MCS is a first value, or a spectral efficiency of the second MCS is equal to a spectral efficiency of the first MCS.
In yet another implementation scenario:
a processing module 801, configured to generate first indication information; a transceiving module 802, configured to send first indication information and second indication information to a terminal device, where the first indication information indicates a first MCS, and the second indication information indicates a second MCS; or the first indication information indicates a first MCS, the second indication information indicates a first difference value, and the first difference value is a difference value between an index value corresponding to the first MCS and an index value corresponding to the second MCS; the transceiver module 802 is further configured to send the first signal according to the MCS corresponding to the first signal, where the MCS corresponding to the first signal is the first MCS or the second MCS.
All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.
In the present application, the network device 80 is presented in the form of dividing each functional module in an integrated manner. As used herein, a module may refer to a specific application-specific integrated circuit (ASIC), an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that provide the described functionality.
In some embodiments, in a hardware implementation, those skilled in the art will appreciate that the network device 80 may take the form of the network device 20 shown in fig. 3.
As an example, the function/implementation procedure of the processing module 801 in fig. 8 may be implemented by the processor 201 in the network device 20 shown in fig. 3 calling a computer executing instruction stored in the memory 202, and the function/implementation procedure of the transceiver module 802 in fig. 8 may be implemented by the transceiver 203 in the network device 20 shown in fig. 3.
In some embodiments, when the network device 80 in fig. 8 is a chip or a chip system, the functions/implementation processes of the transceiver module 802 may be implemented by an input/output interface (or a communication interface) of the chip or the chip system, and the functions/implementation processes of the processing module 801 may be implemented by a processor (or a processing circuit) of the chip or the chip system.
Since the network device 80 provided in this embodiment can execute the signal sending and receiving methods, the technical effects obtained by the method can refer to the method embodiments, and are not described herein again.
As a possible product form, the terminal device or the network device according to the embodiment of the present application may be implemented by using the following: one or more Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuitry, or any combination of circuitry capable of performing the various functions described throughout this application.
In some embodiments, the present application further provides a communication device, which includes a processor and is configured to implement the method in any of the above method embodiments.
As a possible implementation, the communication device further comprises a memory. The memory for storing the necessary program instructions and data, the processor may call the program code stored in the memory to instruct the communication device to perform the method of any of the method embodiments described above. Of course, the memory may not be in the communication device.
As another possible implementation, the communication device further includes an interface circuit, which is a code/data read/write interface circuit, and the interface circuit is used to receive computer execution instructions (the computer execution instructions are stored in the memory, may be directly read from the memory, or may pass through other devices) and transmit the computer execution instructions to the processor.
As yet another possible implementation, the communication device further includes a communication interface for communicating with a module external to the communication device.
It is to be understood that the communication device may be a chip or a chip system, and when the communication device is a chip system, the communication device may be formed by a chip, or may include a chip and other discrete devices, which is not specifically limited in this embodiment of the present application.
In some embodiments, the present application further provides a communication device (for example, the communication device may be a chip or a system-on-chip), which includes an interface circuit and a logic circuit, wherein the interface circuit is used for acquiring input information and/or outputting output information; the logic circuit is configured to perform the method of any of the above method embodiments, process and/or generate output information based on the input information.
When the communication device is used for realizing the functions of the terminal equipment in the above method embodiment:
in one implementation scenario:
as a possible implementation, the input information may be: first indication information indicating a first index value, the first index value corresponding to a first MCS and a second MCS. Correspondingly, the processing according to the input information may be: and determining the first MCS and the second MCS according to the first indication information.
In another implementation scenario:
as a possible implementation, the input information may be: first indication information, the first indication information indicating a first MCS. Correspondingly, the processing according to the input information may be: and determining the first MCS according to the first indication information, or determining the first MCS and the second MCS according to the first indication information.
In yet another implementation scenario:
as a possible implementation, the input information may be: first indication information and second indication information, the first indication information indicating a first MCS and the second indication information indicating a second MCS; alternatively, the first indication information indicates the first MCS, and the second indication information indicates the first difference value. Correspondingly, the processing according to the input information may be: a first MCS is determined according to the first indication information, and a second MCS, or a first difference value, is determined according to the second indication information.
In the above three implementation scenarios, as a possible implementation manner, the input information may also be: a first signal.
When the communication apparatus is used to implement the functions of the network device in the above method embodiments:
in one implementation scenario:
as a possible implementation, the output information may be: first indication information indicating a first index value, the first index value corresponding to a first MCS and a second MCS.
In another implementation scenario:
as a possible implementation, the output information may be: first indication information, the first indication information indicating a first MCS.
In yet another implementation scenario:
as a possible implementation, the output information may be: first indication information and second indication information, the first indication information indicating a first MCS, the second indication information indicating a second MCS; alternatively, the first indication information indicates the first MCS, and the second indication information indicates the first difference value.
In the above three implementation scenarios, as a possible implementation manner, the output information may also be: a first signal.
The communication device provided in this embodiment can execute the method in the above method embodiment, so that the technical effects obtained by the communication device can refer to the above method embodiment, and are not described herein again.
As a possible product form, the terminal device or the network device according to the embodiments of the present application may be implemented by a general bus architecture.
For convenience of explanation, referring to fig. 9, fig. 9 is a schematic structural diagram of a communication device 900 provided in an embodiment of the present application, where the communication device 900 includes a processor 901 and a transceiver 902. The communication apparatus 900 may be a terminal device, or a chip therein. Fig. 9 shows only the main components of the communication device 900. The communication device may further include a memory 903, and an input-output device (not shown) in addition to the processor 901 and the transceiver 902.
The processor 901 is mainly used for processing a communication protocol and communication data, controlling the entire communication apparatus, executing a software program, and processing data of the software program. The memory 903 is primarily used to store software programs and data. The transceiver 902 may include radio frequency circuitry and an antenna, the radio frequency circuitry being primarily used for conversion of baseband signals to radio frequency signals and processing of the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.
The processor 901, the transceiver 902, and the memory 903 may be connected by a communication bus.
When the communication device is powered on, the processor 901 can read the software program in the memory 903, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 901 outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 901, and the processor 901 converts the baseband signal into data and processes the data.
In another implementation, the rf circuitry and antenna may be provided independently of the processor performing the baseband processing, for example in a distributed scenario, the rf circuitry and antenna may be in a remote arrangement independent of the communication device.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the present application are all or partially generated upon loading and execution of computer program instructions on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or can comprise one or more data storage devices, such as a server, a data center, etc., that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others. In the embodiment of the present application, the computer may include the aforementioned apparatus.
While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (30)
1. A method for receiving a signal, the method comprising:
a terminal device receives first indication information from a network device, wherein the first indication information indicates a first index value, the first index value corresponds to a first Modulation and Coding Scheme (MCS) and a second MCS, the first MCS and the second MCS belong to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set comprises a modulation order and a target code rate;
the terminal equipment determines that the MCS corresponding to the first signal is the first MCS or the second MCS;
and the terminal equipment receives the first signal according to the MCS corresponding to the first signal.
2. A method for receiving a signal, the method comprising:
the method comprises the steps that terminal equipment receives first indication information from network equipment, wherein the first indication information indicates a first Modulation and Coding Scheme (MCS), the first MCS belongs to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set comprises a modulation order and a target code rate;
the terminal device determines that the MCS corresponding to the first signal is the first MCS or a second MCS, and a difference value between an index value corresponding to the second MCS and an index value corresponding to the first MCS is a first value, or the spectral efficiency of the second MCS is equal to the spectral efficiency of the first MCS;
and the terminal equipment receives the first signal according to the MCS corresponding to the first signal.
3. The method of claim 1 or 2, wherein the spectral efficiency of the first MCS is equal to the spectral efficiency of the second MCS.
4. The method of any of claims 1-3, wherein the first MCS has a modulation order of 8, a target code rate of 948/1024; the modulation order of the second MCS is 10, and the target code rate is 758.5/1024; the spectral efficiency of the first MCS and the second MCS is 7.4063;
or, the modulation order of the first MCS is 8, and the target code rate is 916.5/1024; the modulation order of the second MCS is 10, and the target code rate is 733/1024; the spectral efficiency of the first MCS and the second MCS is 7.1602.
5. The method of claim 1, wherein the spectral efficiency of the first MCS is not equal to the spectral efficiency of the second MCS.
6. The method of claim 1 or 5, wherein the modulation order of the first MCS is 8, the target coding rate is 916.5/1024, and the spectral efficiency is 7.4063; the modulation order of the second MCS is 10, the target code rate is 790/1024, and the spectral efficiency is 7.7149.
7. The method of any one of claims 1-6, wherein the determining, by the terminal device, the MCS corresponding to the first signal as the first MCS or the second MCS comprises:
and the terminal device determines, according to a first overhead value, that the MCS corresponding to the first signal is the first MCS or the second MCS, wherein the first overhead value is the number of Resource Elements (REs) that are not used for bearing the first signal in time-frequency resources corresponding to the first signal.
8. The method of claim 7, wherein the MCS to which the first signal corresponds is the first MCS if the first overhead value is less than or equal to a first overhead threshold;
and if the first overhead value is greater than a first overhead threshold value, the MCS corresponding to the first signal is the second MCS.
9. A method for signaling, the method comprising:
the method comprises the steps that network equipment sends first indication information to terminal equipment, wherein the first indication information indicates a first index value, the first index value corresponds to a first Modulation Coding Scheme (MCS) and a second MCS, the first MCS and the second MCS belong to a first modulation coding scheme set, and any MCS in the first modulation coding scheme set comprises a modulation order and a target code rate;
and the network equipment sends the first signal according to the MCS corresponding to the first signal, wherein the MCS corresponding to the first signal is the first MCS or the second MCS.
10. A method for signaling, the method comprising:
the method comprises the steps that network equipment sends first indication information to terminal equipment, wherein the first indication information indicates a first Modulation and Coding Scheme (MCS), the first MCS belongs to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set comprises a modulation order and a target code rate;
the network device sends the first signal according to an MCS corresponding to the first signal, where the MCS corresponding to the first signal is the first MCS or a second MCS, and a difference value between an index value corresponding to the second MCS and an index value corresponding to the first MCS is a first value, or a spectral efficiency of the second MCS is equal to a spectral efficiency of the first MCS.
11. The method of claim 9 or 10, wherein the spectral efficiency of the first MCS is equal to the spectral efficiency of the second MCS.
12. The method of any of claims 9-11, wherein the first MCS has a modulation order of 8 and a target code rate of 948/1024; the modulation order of the second MCS is 10, and the target code rate is 758.5/1024; the spectral efficiency of the first MCS and the second MCS is 7.4063;
or, the modulation order of the first MCS is 8, and the target code rate is 916.5/1024; the modulation order of the second MCS is 10, and the target code rate is 733/1024; the spectral efficiency of the first MCS and the second MCS is 7.1602.
13. The method of claim 9, wherein the spectral efficiency of the first MCS is not equal to the spectral efficiency of the second MCS.
14. The method of claim 9 or 13, wherein the first MCS has a modulation order of 8, a target coding rate of 916.5/1024, and a spectral efficiency of 7.4063; the modulation order of the second MCS is 10, the target code rate is 790/1024, and the spectral efficiency is 7.7149.
15. A terminal device, characterized in that the terminal device comprises: the device comprises a processing module and a transceiving module;
the transceiver module is configured to receive first indication information from a network device, where the first indication information indicates a first index value, the first index value corresponds to a first modulation and coding scheme MCS and a second MCS, the first MCS and the second MCS belong to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate;
the processing module is configured to determine that an MCS corresponding to a first signal is the first MCS or the second MCS;
the transceiver module is further configured to receive the first signal according to the MCS corresponding to the first signal.
16. A terminal device, characterized in that the terminal device comprises: the device comprises a processing module and a transmitting-receiving module;
the transceiver module is configured to receive first indication information from a network device, where the first indication information indicates a first Modulation and Coding Scheme (MCS), the first MCS belongs to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate;
the processing module is configured to determine that an MCS corresponding to a first signal is the first MCS or a second MCS, and a difference between an index value corresponding to the second MCS and an index value corresponding to the first MCS is a first value, or a spectral efficiency of the second MCS is equal to a spectral efficiency of the first MCS;
the transceiver module is configured to receive the first signal according to the MCS corresponding to the first signal.
17. The terminal device of claim 15 or 16, wherein the spectral efficiency of the first MCS is equal to the spectral efficiency of the second MCS.
18. The terminal device of any of claims 15-17, wherein the modulation order of the first MCS is 8, and the target code rate is 948/1024; the modulation order of the second MCS is 10, and the target code rate is 758.5/1024; the spectral efficiencies of the first MCS and the second MCS are 7.4063;
or, the modulation order of the first MCS is 8, and the target code rate is 916.5/1024; the modulation order of the second MCS is 10, and the target code rate is 733/1024; the spectral efficiency of the first MCS and the second MCS is 7.1602.
19. The terminal device of claim 15, wherein the spectral efficiency of the first MCS is unequal to the spectral efficiency of the second MCS.
20. The terminal device of claim 15 or 19, wherein the modulation order of the first MCS is 8, the target coding rate is 916.5/1024, and the spectral efficiency is 7.4063; the modulation order of the second MCS is 10, the target code rate is 790/1024, and the spectral efficiency is 7.7149.
21. The terminal device according to any of claims 15-20, wherein the processing module, configured to determine the MCS corresponding to the first signal as the first MCS or the second MCS, comprises:
the processing module is configured to determine, according to a first overhead value, that the MCS corresponding to the first signal is the first MCS or the second MCS, where the first overhead value is the number of resource elements, REs, that are not used for carrying the first signal in time-frequency resources corresponding to the first signal.
22. The terminal device of claim 21, wherein the MCS to which the first signal corresponds is the first MCS when the first overhead value is less than or equal to a first overhead threshold;
and under the condition that the first overhead value is greater than a first overhead threshold value, the MCS corresponding to the first signal is the second MCS.
23. A network device, characterized in that the network device comprises: the device comprises a processing module and a transmitting-receiving module;
the processing module is used for generating first indication information;
the transceiver module is configured to send the first indication information to a terminal device, where the first indication information indicates a first index value, the first index value corresponds to a first modulation and coding scheme MCS and a second MCS, the first MCS and the second MCS belong to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate;
the transceiver module is further configured to send the first signal according to the MCS corresponding to the first signal, where the MCS corresponding to the first signal is the first MCS or the second MCS.
24. A network device, characterized in that the network device comprises: the device comprises a processing module and a transmitting-receiving module;
the processing module is used for generating first indication information;
the transceiver module is configured to send the first indication information to a terminal device, where the first indication information indicates a first Modulation and Coding Scheme (MCS), the first MCS belongs to a first modulation and coding scheme set, and any MCS in the first modulation and coding scheme set includes a modulation order and a target code rate;
the transceiver module is further configured to send the first signal according to an MCS corresponding to the first signal, where the MCS corresponding to the first signal is the first MCS or a second MCS, and a difference between an index value corresponding to the second MCS and an index value corresponding to the first MCS is a first value, or a spectral efficiency of the second MCS is equal to a spectral efficiency of the first MCS.
25. The network device of claim 23 or 24, wherein the spectral efficiency of the first MCS is equal to the spectral efficiency of the second MCS.
26. The network device of any of claims 23-25, wherein the modulation order of the first MCS is 8, the target code rate is 948/1024; the modulation order of the second MCS is 10, and the target code rate is 758.5/1024; the spectral efficiencies of the first MCS and the second MCS are 7.4063;
or, the modulation order of the first MCS is 8, and the target code rate is 916.5/1024; the modulation order of the second MCS is 10, and the target code rate is 733/1024; the spectral efficiency of the first MCS and the second MCS is 7.1602.
27. The network device of claim 23, wherein a spectral efficiency of the first MCS is not equal to a spectral efficiency of the second MCS.
28. The network device of claim 23 or 27, wherein the modulation order of the first MCS is 8, the target coding rate is 916.5/1024, and the spectral efficiency is 7.4063; the modulation order of the second MCS is 10, the target code rate is 790/1024, and the spectral efficiency is 7.7149.
29. A communication apparatus, characterized in that the communication apparatus comprises: a processor and a communication interface;
the communication interface is used for communicating with a module outside the communication device;
the processor is configured to execute computer-executable instructions to cause the communication device to perform the method of any one of claims 1-8 or to cause the communication device to perform the method of any one of claims 9-14.
30. A computer-readable storage medium comprising instructions that, when executed on a communication apparatus, cause the communication apparatus to perform the method of any of claims 1-8 or cause the communication apparatus to perform the method of any of claims 9-14.
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| CN202110057889.7A CN114765482A (en) | 2021-01-15 | 2021-01-15 | Signal transmitting and receiving method and device |
| PCT/CN2021/143078 WO2022151987A1 (en) | 2021-01-15 | 2021-12-30 | Methods and apparatus for sending and receiving signals |
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| WO2024055180A1 (en) * | 2022-09-14 | 2024-03-21 | 华为技术有限公司 | Data transmission method and communication apparatus |
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