Information transmission method and device

Abstract

The present embodiment provides an information transmission method and apparatus applicable to the communications field, particularly the short-range communications field, for example, an in-vehicle wireless communication system. The method includes: a first node receiving a first MCS index from a second node. The first MCS index corresponds to a first modulation mode. The first node receives data from the second node or transmits data to the second node based on the first MCS index. The first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set including 32 MCS information subsets. The present embodiment can improve the flexibility of modulation mode selection and the efficiency and reliability of data transmission. This solution can be used to improve the capabilities of autonomous driving or advanced driver assistance systems (ADAS), and can be applied to Internet of Vehicles, such as vehicle-to-everything (V2X), long-term evolution vehicle (LTE-V), and vehicle-to-vehicle (V2V).

Description

[Technical field]

[0001] The present invention relates to the field of communication technologies and connected vehicles, in particular to the field of short-range wireless communication technologies, such as cockpit domain communications, and in particular to an information transmission method and device. [Background technology]

[0002] With the continuous development of global communication technology, the development speed and application of wireless communication technology are in full swing. Intelligent terminals based on wireless communication technology, such as intelligent transportation devices, smart home devices, and robots, are gradually entering people's daily life. For example, an intelligent terminal is an intelligent transportation device. The development and application of Internet of Vehicles technology is gradually becoming the subject of people's attention, and the in-vehicle wireless can further reduce the amount, length, and weight of the harness in the vehicle, and reduce the installation and maintenance costs of software and hardware in the vehicle. However, as the functions of the vehicle are gradually becoming more complex, the amount and type of communication nodes in the vehicle are increasing, and the requirements imposed on the in-vehicle wireless communication capabilities are becoming higher.

[0003] In wireless communication process, communication channel changes randomly, has frequency selectivity and time-varying characteristics. However, with the increasing amount of service types for intelligent terminals, in the data transmission process of multiple service types, how to improve the flexibility and reliability of data transmission is an urgent technical problem to be solved. Summary of the Invention

[0004] SUMMARY OF THE DISCLOSURE The present embodiments provide an information transmission method and apparatus to improve the flexibility of selecting modulation modes and improve the efficiency and reliability of data transmission.

[0005] According to a first aspect, an embodiment of the present application comprises: a first node receiving a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and The first node receives data from the second node or transmits data to the second node based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and the first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio of the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode.

[0006] According to the above method, the first node can receive a first MCS index and transmit or receive data based on a first modulation mode corresponding to the first MCS index. In this way, the modulation scheme (specifically including modulation mode, spectral efficiency, code rate, etc.) can be dynamically adjusted based on different MCS indexes. For example, when the channel condition is poor, the modulation mode (specifically may further include corresponding spectral efficiency or corresponding code rate) corresponding to a smaller MCS index in the 32 MCS information subset can be selected to transmit or receive data. When the channel condition is good, the modulation mode corresponding to a larger MCS index in the 32 MCS information subset can be selected to transmit or receive data. This improves the flexibility of modulation mode selection, maximizes the transmission capacity of the wireless channel, and improves the efficiency and reliability of data transmission.

[0007] In a possible implementation of the first aspect, the method further comprises: the first node reporting a signal to interference plus noise ratio (SINR) indicator to the second node, the first MCS index corresponding to the SINR indicator.

[0008] Since the wireless communication channel varies randomly, the first node may report a SINR indicator, which may correspond to the channel quality, thereby enabling the second node to determine that it can dynamically adjust the modulation and coding mode based on the channel quality in order to change the transmission rate.

[0009] According to a second aspect, an embodiment of the present application comprises: the second node transmitting a first modulation and coding scheme (MCS) index to the first node, where the first MCS index corresponds to a first modulation mode; and The second node receives data from the first node or transmits data to the first node based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and the first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio of the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode.

[0010] According to the above method, the second node can determine an MCS index and transmit the MCS index to the first node. The second node transmits data to the first node or receives data from the first node based on a first modulation mode corresponding to the first MCS index. In this way, the modulation scheme (specifically including modulation mode, spectral efficiency, code rate, etc.) can be dynamically adjusted based on different MCS indexes. For example, when the channel condition is poor, a modulation mode and spectral efficiency corresponding to a smaller MCS index in the 32 MCS information subset can be selected to transmit or receive data. When the channel condition is good, a modulation mode corresponding to a larger MCS index in the 32 MCS information subset can be selected to transmit or receive data. This improves the flexibility of modulation mode selection, maximizes the transmission capacity of the wireless channel, and improves the efficiency and reliability of data transmission.

[0011] In a possible implementation of the second aspect, the method comprises: the second node receiving a signal to interference plus noise ratio (SINR) indicator reported by the first node; and the second node determining the first MCS index based on the SINR indicator. It further comprises:

[0012] Since the wireless communication channel varies randomly, the first node may report a SINR indicator, which may correspond to the channel quality, thereby enabling the second node to determine that it can dynamically adjust the modulation and coding mode based on the channel quality in order to change the transmission rate.

[0013] In any possible implementation of the first and second aspects, each MCS information subset in the predefined MCS information set includes a corresponding MCS index, a spectral efficiency and / or a code rate corresponding to the MCS index, and a modulation mode or a modulation order of the modulation mode corresponding to the MCS index. The code rate is a ratio between the spectral efficiency corresponding to the MCS index and the modulation order corresponding to the modulation mode. It may also be understood that the predefined MCS information set includes M (e.g., M=32) MCS information subsets, and the M MCS information subsets do not include a reserved entry, and the spectral efficiency and / or the code rate corresponding to the corresponding MCS index in the reserved entry does not exist, or in other words, the spectral efficiency and / or the code rate corresponding to the MCS index in the reserved entry is reserved.

[0014] In a possible implementation of the first and second aspects, the predefined MCS information set includes at least one of quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), 64QAM, 256QAM, or 1024QAM.

[0015] The above describes the modulation modes included in the predefined MCS information set. Since different nodes support different modulation modes, multiple modulation modes can be used by a node to select a modulation mode and a spectral efficiency corresponding to the modulation based on the modulation modes supported by the node.

[0016] Usually, a higher order modulation mode has higher transmission efficiency but lower noise resistance, and a lower order modulation mode has lower transmission efficiency but higher noise resistance. In addition, a higher order modulation mode also has higher device requirements for the transmitting node. The transmitting node can select the modulation mode and the spectrum efficiency corresponding to the modulation based on the modulation mode supported by the transmitting node to achieve higher transmission efficiency. For example, the scenario of in-vehicle wireless communication is significantly different from the traditional communication scenario, such as a macro base station or cell, and the channel conditions for in-vehicle wireless signal transmission are also significantly different. The signal and interference plus noise ratio SINR of the received signal in in-vehicle communication is more ideal in distribution. Therefore, a higher order modulation mode (e.g., 1024QAM) can be introduced for the vehicle (or a specific node in the vehicle) to select.

[0017] In another possible implementation of the first and second aspects, there are 9 MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}.

[0018] The above describes one possible amount of MCS information subsets where the modulation mode is QPSK in 32 information subsets. Since the performance difference between different modulation modes is large, the relationship between the signal-to-noise ratio and the block error rate is reflected as the signal-to-noise ratio required by different modulation modes to reach the target block error rate is significantly different. For example, when the code rate is 0.15, a polar code with a 1024-bit code length is 10 -3Based on the block error rate of 100 MHz, the QPSK modulation mode requires a signal-to-noise ratio of approximately -4 dB, whereas a polar code with a 1024-bit code length requires a signal-to-noise ratio of approximately -4 dB in channel conditions with a code rate of 0.35. -3 Based on the case where a block error rate of 16QAM is reached, 16QAM requires a signal-to-noise ratio of about 5 dB. The performance difference between the two modulation methods (specifically including modulation mode, and further including code rate or spectrum efficiency) is large. In a communication system, when the performance difference between the modulation methods is large, a smaller amount of modulation methods can be selected within the signal-to-noise ratio range to meet the block error rate requirement. In this case, it is difficult to meet the user requirements. Therefore, in the above solution, the nine information subsets with the modulation mode of QPSK enable the performance difference between the modulation methods to be small, so that the device supporting QPSK can properly select a better modulation method within the signal-to-noise ratio range. Furthermore, in the MCS information subset with the modulation mode of QPSK, the interval between two adjacent code rates is small and uniform. In this way, the highest possible modulation method can be selected within the signal-to-noise ratio range to improve the rate and reliability of data transmission.

[0019] In yet another possible implementation of the first and second aspects, there are 10 MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}.

[0020] The above describes one possible amount of MCS information subsets where the modulation mode is QPSK in 32 information subsets. Because the performance difference between different modulation modes is large, the relationship between signal-to-noise ratio and block error rate is reflected as the signal-to-noise ratio required by different modulation modes to reach the target block error rate is significantly different. For example, when the code rate is 0.15, a polar code with a 1024-bit code length is 10 -3 Based on the block error rate of 100 MHz, the QPSK modulation mode requires a signal-to-noise ratio of approximately -4 dB, whereas a polar code with a 1024-bit code length requires a signal-to-noise ratio of approximately -4 dB in channel conditions with a code rate of 0.45. -3 Based on the case where the block error rate of 16QAM is reached, 16QAM requires a signal-to-noise ratio of about 6.5 dB. The performance difference between the two modulation methods (specifically including modulation mode, and further including code rate or spectrum efficiency) is large. In a communication system, when the performance difference between the modulation methods is large, a smaller amount of modulation methods can be selected within the signal-to-noise ratio range to meet the block error rate requirement. In this case, it is difficult to meet the user requirements. Therefore, in the above solution, the 10 information subsets with the modulation mode of QPSK enable the performance difference between the modulation methods to be small, so that the device supporting QPSK can properly select a better modulation method within the signal-to-noise ratio range. Furthermore, in the MCS information subset with the modulation mode of QPSK, the interval between two adjacent code rates is small and uniform. In this way, the highest possible modulation method can be selected within the signal-to-noise ratio range to improve the rate and reliability of data transmission. Moreover, in the above solution, the highest code rate in the information subset is 0.8008, so that devices supporting QPSK can achieve high throughput.

[0021] In yet another possible implementation of the first and second aspects, there are 7, 8, 9 or 10 MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is QPSK include the entire set or a subset of the set {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate sets corresponding to the MCS information subsets include the entire set or a subset of the set {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}. For example, if the amount of MCS information subsets whose modulation mode is QPSK is one of 7 to 10, the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is QPSK includes the following subsets: {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}. For example, the subset is {0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}. For another example, if the amount of MCS information subsets with a modulation mode of QPSK is 10, the spectral efficiency set corresponding to the MCS information subsets with a modulation mode of QPSK includes a proper subset of {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, but not {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}. For a description of the code rate set, please refer to the corresponding description of the spectral efficiency set.

[0022] The above describes one possible quantity of MCS information subsets whose modulation mode is QPSK in 32 information subsets. Therefore, in the above solution, the information subset whose modulation mode is QPSK and whose design quantity is more flexible can reduce the performance difference between modulation methods, so that the device that supports QPSK can appropriately select a better modulation method within the signal-to-noise ratio range. Furthermore, in the MCS information candidate subset whose modulation mode is QPSK, the interval between two adjacent code rates is small and uniform. The system can comprehensively select a suitable MCS information subset based on the application scenario to achieve a balance between performance and complexity.

[0023] In yet another possible implementation of the first and second aspects, there are four MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 16QAM are {1.5273, 1.8008, 2.0781, 2.4023}, or the code rate sets corresponding to the MCS information subsets are {0.3818, 0.4502, 0.5195, 0.6006}.

[0024] In yet another possible implementation of the first and second aspects, there are seven MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 16QAM are {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets are {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}. In yet another possible implementation of the first and second aspects, there are 4, 5, 6 or 7 MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 16QAM include the entire set or a subset of the set {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets include the entire set or a subset of the set {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}. For example, when the amount of MCS information subsets with a modulation mode of 16QAM is one of 4 to 7, the spectral efficiency set corresponding to the MCS information subsets with a modulation mode of 16QAM includes a subset of {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, for example, {2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}. For another example, if the amount of MCS information subsets with a modulation mode of 16QAM is 7, the spectral efficiency set corresponding to the MCS information subsets with a modulation mode of QPSK includes a proper subset of {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, but not {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}. For a description of the code rate sets, please refer to the corresponding description of the spectral efficiency sets.

[0025] The above describes some possible amounts of MCS information subsets whose modulation mode is 16QAM in 32 information subsets, so that devices that support 16QAM can select a better modulation scheme. Furthermore, in the MCS information subsets whose modulation mode is 16QAM, the interval between two adjacent code rates is small and uniform. Therefore, to improve the rate and reliability of data transmission, a higher-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0026] In yet another possible implementation of the first and second aspects, there are 9 MCS information subsets in the predefined MCS information set with a modulation mode of 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 64QAM are {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}.

[0027] In yet another possible implementation of the first and second aspects, there are six MCS information subsets in the predefined MCS information set with a modulation mode of 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 64QAM are {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate sets corresponding to the MCS information subsets are {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}.

[0028] In yet another possible implementation of the first and second aspects, there are 6, 7, 8 or 9 MCS information subsets in the predefined MCS information set with a modulation mode of 64QAM, and the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 64QAM include the entire set or a subset of the set {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate sets corresponding to the MCS information subsets include the entire set or a subset of the set {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}. For example, if there are eight MCS information subsets with a modulation mode of 64QAM in the predefined MCS information set, the spectral efficiency set corresponding to the eight MCS information subsets with a modulation mode of 64QAM includes the set {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or includes a proper subset but not the entire set {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}. For the description of the code rate set, please refer to the corresponding description of the spectral efficiency set.

[0029] The above describes some possible amounts of MCS information subsets whose modulation mode is 64QAM in 32 information subsets, so that devices that support 64QAM can select better modulation schemes. Furthermore, in the MCS information subsets whose modulation mode is 64QAM, the interval between two adjacent code rates is small and uniform. Therefore, to improve the rate and reliability of data transmission, a higher order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0030] In yet another possible implementation of the first and second aspects, there are five MCS information subsets in which the modulation mode is 256QAM in the predefined MCS information set. The spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 256QAM is {5.2813, 5.7188, 6.1797, 6.6016, 7.0000}, or includes a proper subset of {5.2813, 5.7188, 6.1797, 6.6016, 7.0000}, or the code rate set corresponding to the MCS information subset is {0.6602, 0.7148, 0.7725, 0.8252, 0.8750}, or includes a proper subset of {0.6602, 0.7148, 0.7725, 0.8252, 0.8750}. Alternatively, the spectral efficiency set corresponding to the MCS information subset with the modulation mode being 256QAM is or includes a proper subset of {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate set corresponding to the MCS information subset is or includes a proper subset of {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}.

[0031] The above describes one possible amount of MCS information subsets whose modulation mode is 256QAM in 32 information subsets, and a device that supports 256QAM can select a modulation scheme with better performance by using 5 information subsets whose modulation mode is 256QAM. Furthermore, in the MCS information subset whose modulation mode is 256QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0032] In yet another possible implementation of the first and second aspects, there are five MCS information subsets in the predefined MCS information set with a modulation mode of 1024QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 1024QAM are {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate sets corresponding to the MCS information subsets are {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}.

[0033] In yet another possible implementation of the first and second aspects, there are four MCS information subsets in the predefined MCS information set with a modulation mode of 1024QAM, and the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 1024QAM are {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate sets corresponding to the MCS information subsets are {0.7500, 0.7930, 0.8359, 0.9229}.

[0034] In yet another possible implementation of the first and second aspects, there are four or five MCS information subsets in the predefined MCS information set with a modulation mode of 1024QAM, and the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 1024QAM include the entire set or a subset of the set {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate sets corresponding to the MCS information subsets include the entire set or a subset of the set {0.7500, 0.7930, 0.8359, 0.9229}. For example, if there are five MCS information subsets with a modulation mode of 1024QAM in a predefined MCS information set, the spectral efficiency set corresponding to the MCS information subsets with a modulation mode of 1024QAM includes the full set or a proper subset of the set {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate set corresponding to the MCS information subsets includes the full set or a proper subset of the set {0.7500, 0.7930, 0.8359, 0.9229}.

[0035] The above describes one possible amount of MCS information subsets whose modulation mode is 1024QAM in 32 information subsets, so that devices that support 1024QAM can select a better modulation scheme. Furthermore, in the MCS information subsets whose modulation mode is 1024QAM, the interval between two adjacent code rates is small and uniform. Therefore, to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0036] In yet another possible implementation of the first and second aspects, there are information subsets in the predefined MCS information set whose code rate is higher than or equal to a predefined value, for example, the predefined value is 0.875.

[0037] To further improve the system throughput, the code rate may be increased, for example, to a value higher than or equal to 12 / 13 or 0.9229. Optionally, there is an information subset in the predefined MCS information set with a code rate higher than or equal to 0.9229.

[0038] Code rate, also called code rate, code efficiency, or code rate, is the proportion of desired data in a data stream. A larger code rate indicates a larger proportion of desired data and a higher information transmission efficiency. Usually, when the channel quality is poor, more redundant information needs to be added to ensure that the receiver can correctly demodulate the signal. In this case, the code rate is low. When the channel quality is good, very few redundancy check bits can correctly demodulate the signal. In this case, the code rate is high. Therefore, an appropriate code rate is selected based on the channel variation, so that users with good channel quality can obtain a higher information transmission rate.

[0039] In the above implementation, since there are information subsets in the information set whose code rate is higher than or equal to 0.875, when the channel quality is good, a modulation mode corresponding to the information subset whose code rate is higher than 0.875, for example 0.9229, can be selected for modulation to improve the efficiency of data transmission.

[0040] In yet another possible implementation of the first and second aspects, in the predefined MCS information set with modulation modes 1024QAM, 256QAM, and 64QAM, there are information subsets in the information subsets corresponding to one or more modulation modes with a code rate higher than or equal to 0.875. Alternatively, in the predefined MCS information set with modulation modes 1024QAM, 256QAM, and 64QAM, there are information subsets in the information subsets corresponding to one or more modulation modes with a code rate higher than or equal to 0.9229.

[0041] In yet another possible implementation of the first and second aspects, for a plurality of MCS information subsets, an interval between the first reference code rate difference and the difference between the code rates corresponding to any two adjacent indices whose corresponding modulation modes are the same is lower than or equal to a first code rate threshold.

[0042] The above describes the code rate distribution rule between information subsets with the same modulation mode. The difference between two adjacent code rates always distributes within a certain range. When the rule is reflected, the difference between two adjacent code rates always distributes around a first reference code rate difference, and the interval (or deviation) between the difference and the first reference code rate difference is lower than or equal to the first code rate threshold (for example, the first reference code rate difference is 0.07, and the first code rate threshold is 0.045. The difference between two adjacent code rates is always approximately 0.07, and the interval between the difference and 0.07 does not exceed 0.045. In other words, the difference between the code rates falls within the interval [0.025, 0.15]). Therefore, the interval between the code rates is small and uniform. In this way, a high-order modulation scheme can be selected as much as possible within the signal-to-noise ratio range to improve the rate and reliability of data transmission. The first reference code rate difference is used to describe a code rate distribution rule, and may not be a fixed value.

[0043] In yet another possible implementation of the first and second aspects, there are four MCS information subsets in the predefined MCS information set with a modulation mode of QPSK, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of QPSK is {0.3086, 0.4453, 0.6309, 0.8652}, or the set of code rates corresponding to the MCS information subsets is {0.1543, 0.2227, 0.3154, 0.4326}.

[0044] The above describes another possible amount of MCS information subsets in which the modulation mode is QPSK in 32 information subsets. Since QPSK has good noise resistance but low efficiency of data transmission, QPSK is usually used on channels with low SNR. However, since the SNR in some scenarios, such as vehicular wireless channels, is high, the amount of QPSK modulation modes can be reduced or the interval between code rates of QPSK modulation modes can be increased to accommodate scenarios with high SNR. The performance difference between modulation modes working in low signal-to-noise ratios is increased, thereby reducing the performance difference between modulation modes working in high signal-to-noise ratios to improve the transmission efficiency and reliability of communication systems working in scenarios with high signal-to-noise ratios.

[0045] In yet another possible implementation of the first and second aspects, there are seven MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 16QAM are {0.9219, 1.1211, 1.3203, 1.5586, 1.8203, 2.0781, 2.3594}, or the code rate sets corresponding to the MCS information subsets are {0.2305, 0.2803, 0.3301, 0.3896, 0.4551, 0.5195, 0.5898}.

[0046] In yet another possible implementation of the first and second aspects, there are 10 MCS information subsets in the predefined MCS information set with a modulation mode of 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 64QAM are {2.3613, 2.6660, 2.9766, 3.2813, 3.6445, 3.9785, 4.3066, 4.6523, 4.9512, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.3936, 0.4443, 0.4961, 0.5469, 0.6074, 0.6631, 0.7178, 0.7754, 0.8252, 0.8750}.

[0047] In yet another possible implementation of the first and second aspects, there are six MCS information subsets in the predefined MCS information set with a modulation mode of 256QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of 256QAM are {5.2813, 5.6328, 6.0000, 6.3125, 6.6797, 7.0000}, or the set of code rates corresponding to the MCS information subsets are {0.6602, 0.7041, 0.7500, 0.7891, 0.8350, 0.8750}.

[0048] In yet another possible implementation of the first and second aspects, there are five MCS information subsets in the predefined MCS information set with a modulation mode of 1024QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 1024QAM are {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate sets corresponding to the MCS information subsets are {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}.

[0049] In yet another possible implementation of the first and second aspects, for information subsets in which the modulation mode is 16QAM, 64QAM, or 1024QAM in the MCS information set, the interval between the second reference code rate difference and the difference between the code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a second code rate threshold. Moreover, the second reference code rate difference is lower than the first reference code rate difference, and the second code rate threshold is lower than the first code rate threshold.

[0050] The above describes the code rate distribution rule between information subsets with the same modulation mode in the information subsets with modulation mode of 16QAM, 64QAM or 1024QAM. Compared with QPSK, 16QAM, 64QAM or 1024QAM has higher information transmission rate, but has poorer noise resistance capability, and therefore works on a channel with high signal-to-noise ratio. However, in a communication scenario, such as in-vehicle communication, the signal-to-noise ratio of the channel is high. Therefore, in this scenario, the interval between the code rates of the information subsets of 16QAM, 64QAM or 1024QAM can be reduced, so that the performance difference between the modulation modes working in high signal-to-noise ratio is small, in order to improve the transmission efficiency and reliability of the communication system working in the scenario with high signal-to-noise ratio.

[0051] It should be noted that the second reference code rate difference and the second code rate threshold are used to describe the code rate distribution rule and may not be fixed values. For example, the second reference code rate difference may be 0.055, and the second code rate threshold is 0.02. In this way, the difference between two adjacent code rates falls within the range [0.035, 0.075], and the performance difference between modulation modes is small.

[0052] In yet another possible implementation of the first and second aspects, there are four MCS information subsets in the predefined MCS information set with a modulation mode of QPSK, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of QPSK is {0.2617, 0.3828, 0.5469, 0.7578}, or the set of code rates corresponding to the MCS information subsets is {0.1309, 0.1914, 0.2734, 0.3789}.

[0053] The above describes yet another possible amount of MCS information subsets with modulation mode QPSK in 32 information subsets, where the performance difference between modulation modes working at low signal-to-noise ratios is increased, thereby reducing the performance difference between modulation modes working at high signal-to-noise ratios, in order to improve the transmission efficiency and reliability of the communication system working in scenarios with high signal-to-noise ratios.

[0054] In yet another possible implementation of the first and second aspects, there are four MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of QPSK is {0.8008, 1.1211, 1.5000, 1.9219}, or the set of code rates corresponding to the MCS information subsets is {0.2002, 0.2803, 0.3750, 0.4805}.

[0055] In yet another possible implementation of the first and second aspects, there are 12 MCS information subsets in which the modulation mode is 64QAM in the predefined MCS information set, and / or the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 64QAM is {2.0508, 2.3613, 2.6367, 2.9414, 3.2168, 3.5098}. , 3.8203, 4.1016, 4.4121, 4.6992, 4.9863, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.3418, 0.3936, 0.4395, 0.4902, 0.5361, 0.5850, 0.6367, 0.6836, 0.7354, 0.7832, 0.8311, 0.8750}.

[0056] In yet another possible implementation of the first and second aspects, there are six MCS information subsets in the predefined MCS information set with a modulation mode of 256QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 256QAM are {5.2813, 5.6328, 6.0000, 6.3125, 6.6797, 7.0000}, or the code rate sets corresponding to the MCS information subsets are {0.6602, 0.704, 0.7500, 0.7891, 0.8350, 0.8750}.

[0057] In yet another possible implementation of the first and second aspects, there are six MCS information subsets in the predefined MCS information set with a modulation mode of 1024QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 1024QAM are {7.0313, 7.3730, 7.6953, 8.0957, 8.4570, 8.7500}, or the code rate sets corresponding to the MCS information subsets are {0.7031, 0.7373, 0.7695, 0.8096, 0.8457, 0.8750}.

[0058] In yet another possible implementation of the first and second aspects, when a modulation mode and spectral efficiency or code rate corresponding to any MCS index in the 32 MCS information subsets is used to modulate a wireless communication signal, the signal-to-noise ratio required to reach a target block error rate falls within the interval [-5 dB, 30 dB] or [-5 dB, 32 dB].

[0059] According to a third aspect, an embodiment of the present application comprises: a communication unit configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the second node by using the communication unit or to transmit data to the second node by using the communication unit based on the first MCS index. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio of the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode.

[0060] The above-mentioned device can receive an MCS index and confirm that data can be transmitted or received based on a first modulation mode corresponding to the first MCS index. In this way, the modulation scheme (specifically including modulation mode, spectral efficiency, code rate, etc.) can be dynamically adjusted based on different MCS indexes. For example, when the channel condition is poor, a modulation mode and spectral efficiency corresponding to a smaller MCS index in the 32 MCS information subset can be selected to transmit or receive data. When the channel condition is good, a modulation mode corresponding to a larger MCS index in the 32 MCS information subset can be selected to transmit or receive data. This improves the flexibility of modulation mode selection, maximizes the transmission capacity of the wireless channel, and improves the efficiency and reliability of data transmission.

[0061] In a possible implementation of the third aspect, the communication unit is further configured to report a SINR indicator to the second node, the first MCS index corresponding to the SINR indicator.

[0062] Since the wireless communication channel varies randomly, the aforementioned device may report a SINR indicator, which may correspond to the channel quality, thereby enabling the second node to determine that it can dynamically adjust the modulation and coding mode based on the channel quality in order to change the transmission rate.

[0063] According to a fourth aspect, an embodiment of the present application comprises: a communication unit configured to transmit a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the first node by using the communication unit or to transmit data to the first node by using the communication unit based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio of the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode.

[0064] The information transmitting device as described above can determine an MCS index, transmit the MCS index to a first node, and confirm that data can be transmitted or received based on a first modulation mode corresponding to the first MCS index. In this way, the modulation scheme (specifically including modulation mode, spectral efficiency, code rate, etc.) can be dynamically adjusted based on different MCS indexes. For example, when the channel condition is poor, a modulation mode and spectral efficiency corresponding to a smaller MCS index in the 32 MCS information subsets can be selected to transmit or receive data. When the channel condition is good, a modulation mode corresponding to a larger MCS index in the 32 MCS information subsets can be selected to transmit or receive data. This improves the flexibility of modulation mode selection, maximizes the transmission capacity of the wireless channel, and improves the efficiency and reliability of data transmission.

[0065] In a possible implementation of the fourth aspect, the communication unit is further configured to receive a signal to interference plus noise ratio (SINR) indicator reported by the first node; and The processing unit is further configured to determine a first MCS index based on the SINR indicator.

[0066] Since the wireless communication channel varies randomly, the first node may report a SINR indicator, which may correspond to the channel quality, thereby enabling the second node to determine that it can dynamically adjust the modulation and coding mode based on the channel quality in order to change the transmission rate.

[0067] In any possible implementation of the third and fourth aspects, each MCS information subset in the predefined MCS information set includes an MCS index, a spectral efficiency and / or a code rate corresponding to the MCS index, and a modulation mode or a modulation order of the modulation mode corresponding to the MCS index. The code rate is the ratio between the spectral efficiency corresponding to the MCS index and the modulation order corresponding to the modulation mode. It may also be understood that the predefined MCS information set does not include reserved entries.

[0068] In a possible implementation of the third and fourth aspects, the predefined MCS information set includes at least one of quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), 64QAM, 256QAM, or 1024QAM.

[0069] The above describes the modulation modes included in the predefined MCS information set. Since different nodes support different modulation modes, multiple modulation modes can be used by a node to select a modulation mode and a spectral efficiency corresponding to the modulation based on the modulation modes supported by the node.

[0070] Usually, a higher order modulation mode has higher transmission efficiency but lower noise resistance, and a lower order modulation mode has lower transmission efficiency but higher noise resistance. In addition, a higher order modulation mode also has higher device requirements for the transmitting node. The transmitting node can select the modulation mode and the spectrum efficiency corresponding to the modulation based on the modulation mode supported by the transmitting node to achieve higher transmission efficiency. For example, the scenario of in-vehicle wireless communication is significantly different from the traditional communication scenario, such as a macro base station or cell, and the channel conditions for in-vehicle wireless signal transmission are also significantly different. The signal and interference plus noise ratio SINR of the received signal in in-vehicle communication is more ideal in distribution. Therefore, a higher order modulation mode (e.g., 1024QAM) can be introduced for the vehicle (or a specific node in the vehicle) to select.

[0071] In another possible implementation of the third and fourth aspects, there are 9 MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}.

[0072] In yet another possible implementation of the third and fourth aspects, there are 10 MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}.

[0073] In yet another possible implementation of the third and fourth aspects, there are four MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 16QAM are {1.5273, 1.8008, 2.0781, 2.4023}, or the code rate sets corresponding to the MCS information subsets are {0.3818, 0.4502, 0.5195, 0.6006}.

[0074] In yet another possible implementation of the third and fourth aspects, there are seven MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 16QAM are {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets are {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}.

[0075] In yet another possible implementation of the third and fourth aspects, there are 9 MCS information subsets in the predefined MCS information set with a modulation mode of 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 64QAM are {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}.

[0076] In yet another possible implementation of the third and fourth aspects, there are six MCS information subsets in the predefined MCS information set with a modulation mode of 64QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of 64QAM are {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the set of code rates corresponding to the MCS information subsets are {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}.

[0077] In yet another possible implementation of the third and fourth aspects, there are five MCS information subsets in the predefined MCS information set where the modulation mode is 256QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 256QAM are {5.2813, 5.7188, 6.1797, 6.6016, 7.0000} or {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate sets corresponding to the MCS information subsets are {0.6602, 0.7148, 0.7725, 0.8252, 0.8750} or {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}.

[0078] In yet another possible implementation of the third and fourth aspects, there are five MCS information subsets in the predefined MCS information set with a modulation mode of 1024QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 1024QAM are {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate sets corresponding to the MCS information subsets are {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}.

[0079] In yet another possible implementation of the third and fourth aspects, there are four MCS information subsets in the predefined MCS information set with a modulation mode of 1024QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of 1024QAM are {7.5000, 7.9297, 8.3594, 9.2285}, or the set of code rates corresponding to the MCS information subsets are {0.7500, 0.7930, 0.8359, 0.9229}.

[0080] In yet another possible implementation of the third and fourth aspects, there are information subsets in the predefined MCS information set whose code rate is higher than or equal to a predefined value, for example, the predefined value is 0.875 or 0.9229.

[0081] In yet another possible implementation of the third and fourth aspects, for information subsets with modulation modes of 1024QAM, 256QAM, and 64QAM in the predefined MCS information set, there are information subsets with a code rate higher than or equal to 0.875 or 0.9229 in the information subsets corresponding to one or more modulation modes.

[0082] In yet another possible implementation of the third and fourth aspects, for a plurality of MCS information subsets, an interval between the first reference code rate difference and the difference between the code rates corresponding to any two adjacent indices whose corresponding modulation modes are the same is lower than or equal to a first code rate threshold.

[0083] In yet another possible implementation of the third and fourth aspects, there are four MCS information subsets in the predefined MCS information set with a modulation mode of QPSK, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of QPSK is {0.3086, 0.4453, 0.6309, 0.8652}, or the set of code rates corresponding to the MCS information subsets is {0.1543, 0.2227, 0.3154, 0.4326}.

[0084] In yet another possible implementation of the third and fourth aspects, there are seven MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 16QAM are {0.9219, 1.1211, 1.3203, 1.5586, 1.8203, 2.0781, 2.3594}, or the code rate sets corresponding to the MCS information subsets are {0.2305, 0.2803, 0.3301, 0.3896, 0.4551, 0.5195, 0.5898}.

[0085] In yet another possible implementation of the third and fourth aspects, there are 10 MCS information subsets in the predefined MCS information set with a modulation mode of 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 64QAM are {2.3613, 2.6660, 2.9766, 3.2813, 3.6445, 3.9785, 4.3066, 4.6523, 4.9512, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.3936, 0.4443, 0.4961, 0.5469, 0.6074, 0.6631, 0.7178, 0.7754, 0.8252, 0.8750}.

[0086] In yet another possible implementation of the third and fourth aspects, there are six MCS information subsets in the predefined MCS information set with a modulation mode of 256QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 256QAM are {5.2813, 5.6328, 6.0000, 6.3125, 6.6797, 7.0000}, or the code rate sets corresponding to the MCS information subsets are {0.6602, 0.7041, 0.7500, 0.7891, 0.8350, 0.8750}.

[0087] In yet another possible implementation of the third and fourth aspects, there are five MCS information subsets in the predefined MCS information set with a modulation mode of 1024QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 1024QAM are {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate sets corresponding to the MCS information subsets are {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}.

[0088] In yet another possible implementation of the third and fourth aspects, for information subsets in which the modulation mode is 16QAM, 64QAM, or 1024QAM in the MCS information set, the interval between the second reference code rate difference and the difference between the code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a second code rate threshold. Furthermore, the second reference code rate difference is lower than the first reference code rate difference, and the second code rate threshold is lower than the first code rate threshold.

[0089] In yet another possible implementation of the third and fourth aspects, there are four MCS information subsets in the predefined MCS information set with a modulation mode of QPSK, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of QPSK is {0.2617, 0.3828, 0.5469, 0.7578}, or the set of code rates corresponding to the MCS information subsets is {0.1309, 0.1914, 0.2734, 0.3789}.

[0090] The above describes another possible amount of MCS information subsets with modulation mode QPSK in 32 information subsets. The performance difference between modulation modes working at low signal-to-noise ratios is increased, and therefore the performance difference between modulation modes working at high signal-to-noise ratios is reduced in order to improve the transmission efficiency and reliability of the communication system working in scenarios with high signal-to-noise ratios.

[0091] In yet another possible implementation of the third and fourth aspects, there are four MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of QPSK is {0.8008, 1.1211, 1.5000, 1.9219}, or the set of code rates corresponding to the MCS information subsets is {0.2002, 0.2803, 0.3750, 0.4805}.

[0092] In yet another possible implementation of the third and fourth aspects, there are 12 MCS information subsets in which the modulation mode is 64QAM in the predefined MCS information set, and / or the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 64QAM is {2.0508, 2.3613, 2.6367, 2.9414, 3.2168, 3.5098} , 3.8203, 4.1016, 4.4121, 4.6992, 4.9863, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.3418, 0.3936, 0.4395, 0.4902, 0.5361, 0.5850, 0.6367, 0.6836, 0.7354, 0.7832, 0.8311, 0.8750}.

[0093] In yet another possible implementation of the third and fourth aspects, there are six MCS information subsets in the predefined MCS information set with a modulation mode of 256QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 256QAM are {5.2813, 5.6328, 6.0000, 6.3125, 6.6797, 7.0000}, or the code rate sets corresponding to the MCS information subsets are {0.6602, 0.704, 0.7500, 0.7891, 0.8350, 0.8750}.

[0094] In yet another possible implementation of the third and fourth aspects, there are six MCS information subsets in the predefined MCS information set with a modulation mode of 1024QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 1024QAM are {7.0313, 7.3730, 7.6953, 8.0957, 8.4570, 8.7500}, or the code rate sets corresponding to the MCS information subsets are {0.7031, 0.7373, 0.7695, 0.8096, 0.8457, 0.8750}.

[0095] In yet another possible implementation of the third and fourth aspects, when a modulation mode and spectral efficiency or code rate corresponding to any MCS index in the 32 MCS information subset is used to modulate a wireless communication signal, the signal-to-noise ratio required to reach a target block error rate falls within the interval [-5 dB, 30 dB] or [-5 dB, 32 dB].

[0096] According to a fifth aspect, an embodiment of the present application provides an information transmission device comprising at least one processor and a communication interface, the at least one processor being configured to call a computer program stored in at least one memory to enable the information transmission device to implement the method according to the first aspect and any one of the possible implementations of the first aspect, or to implement the method according to the second aspect and any one of the possible implementations of the second aspect.

[0097] According to a sixth aspect, an embodiment of the present application provides a chip system comprising at least one processor and a communication interface, the at least one processor configured to call a computer program stored in at least one memory to enable an apparatus in which the chip system is located to implement the method according to the first aspect and any one of the possible implementations of the first aspect or to implement the method according to the second aspect and any one of the possible implementations of the second aspect.

[0098] According to a seventh aspect, an embodiment of the present application further provides an information transmission system. The information transmission system includes a first node and a second node. The first node includes an information transmission device according to the third aspect and any one of the possible implementations of the third aspect. The second node includes an information transmission device according to the fourth aspect and any one of the possible implementations of the fourth aspect.

[0099] According to an eighth aspect, an embodiment of the present application discloses a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed on one or more processors, the method according to the first aspect and any one of the possible implementations of the first aspect is implemented, or the method according to the second aspect and any one of the possible implementations of the second aspect is implemented.

[0100] According to a ninth aspect, an embodiment of the present application discloses a computer program product, which, when executed on one or more processors, implements a method according to the first aspect and any one of the possible implementations of the first aspect, or implements a method according to the second aspect and any one of the possible implementations of the second aspect.

[0101] According to a tenth aspect, an embodiment of the present application discloses a terminal. The terminal may be an intelligent cockpit product, a vehicle, etc., and the terminal includes a first node and / or a second node. The first node (e.g., one or more of modules such as a camera, a screen, a microphone, a speaker, a radar, an electronic key, a keyless entry and start system controller, and a user equipment UE) includes an apparatus according to the third aspect and any one of the possible implementations of the third aspect. The second node (e.g., a base station or a cockpit domain controller CDC) includes an information transmission device according to the fourth aspect and any one of the possible implementations of the fourth aspect. Alternatively, the vehicle may be replaced by an intelligent terminal or a transport vehicle, for example, an unmanned aerial vehicle or a robot. [Brief description of the drawings]

[0102] The following describes the accompanying drawings used in the embodiments of the present application.

[0103] [Figure 1] FIG. 1 is a schematic diagram of the architecture of an information transmission system according to an embodiment of the present application;

[0104] [Diagram 2] FIG. 2 is a diagram of an application scenario of the information transmission method according to an embodiment of the present application;

[0105] [Diagram 3] 1 is a schematic flowchart of an information transmission method according to an embodiment of the present application;

[0106] [Figure 4] FIG. 2 is a schematic diagram of an MCS table according to an embodiment of the present application.

[0107] [Diagram 5] FIG. 2 is a schematic diagram of another MCS table according to an embodiment of the present application;

[0108] [Figure 6] FIG. 13 is a schematic diagram of yet another MCS table according to an embodiment of the present application;

[0109] [Figure 7A] FIG. 2 is a schematic diagram of possible performance of a modulation scheme according to an embodiment of the present application;

[0110] [Figure 7B] FIG. 2 is a schematic diagram of possible performance of another modulation scheme according to an embodiment of the present application;

[0111] [Figure 8] FIG. 13 is a schematic diagram of yet another MCS table according to an embodiment of the present application;

[0112] [Figure 9] FIG. 13 is a schematic diagram of yet another MCS table according to an embodiment of the present application;

[0113] [Figure 10A] FIG. 13 is a schematic diagram of possible performance of yet another modulation scheme according to an embodiment of the present application;

[0114] [Figure 10B] FIG. 13 is a schematic diagram of possible performance of yet another modulation scheme according to an embodiment of the present application;

[0115] [Figure 11] FIG. 13 is a schematic diagram of yet another MCS table according to an embodiment of the present application;

[0116] [Figure 12] FIG. 13 is a schematic diagram of yet another MCS table according to an embodiment of the present application;

[0117] [Figure 13A] FIG. 13 is a schematic diagram of possible performance of yet another modulation scheme according to an embodiment of the present application;

[0118] [Figure 13B] FIG. 13 is a schematic diagram of possible performance of yet another modulation scheme according to an embodiment of the present application;

[0119] [Figure 14] FIG. 1 is a schematic diagram of the structure of an information transmitting device according to an embodiment of the present application;

[0120] [Figure 15] FIG. 13 is a schematic diagram of possible performance of yet another modulation scheme according to an embodiment of the present application;

[0121] [Figure 16] FIG. 13 is a schematic diagram of possible performance of yet another modulation scheme according to an embodiment of the present application;

[0122] [Figure 17] FIG. 13 is a schematic diagram of yet another MCS table according to an embodiment of the present application;

[0123] [Figure 18] FIG. 13 is a schematic diagram of yet another MCS table according to an embodiment of the present application;

[0124] [Figure 19] FIG. 13 is a schematic diagram of yet another MCS table according to an embodiment of the present application;

[0125] [Figure 20A] FIG. 13 is a schematic diagram of possible performance of yet another modulation scheme according to an embodiment of the present application;

[0126] [Figure 20B] FIG. 13 is a schematic diagram of possible performance of yet another modulation scheme according to an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0127] The following describes the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. In this application, terms such as "example" or "for example" are used to indicate giving an example, illustration, or explanation. Any embodiment or design manner described in this application using "example" or "for example" should not be described as being preferred or having more advantages than another embodiment or design manner. The use of terms such as "example" or "for example" is intended to present the related concept in a particular way.

[0128] It should be noted that the node in the embodiment of the present application is an electronic device having data receiving and transmitting processing capabilities, and may include a terminal device or a network side device, or may be a chip included in a terminal device or a network side device. For example, the node may be a cockpit domain device or a module in a cockpit domain device (e.g., one or more of modules such as a cockpit domain controller (CDC), a camera, a screen, a microphone, a speaker, an electronic key, and a keyless entry or start system controller). In a particular implementation process, the node may alternatively be a data forwarding device, such as a base station, a router, a repeater, a bridge, or a switch, or may be a terminal device, such as various types of user equipment (UE), a mobile phone, a tablet computer (pad), a desktop computer, a headset, or a speaker, or may further include a machine intelligence device, such as a self-driving device, a transportation safety device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a machine type communication (MTC) device, an industrial control device, a remote medical device, a smart grid device, or a smart city device, or may further include a wearable device (e.g., a smart watch, a smart band, or a pedometer), etc.

[0129] In some technical scenarios, the names of devices having similar data receiving and transmitting capabilities may not be nodes, however, for ease of description, electronic devices having data receiving and transmitting capabilities are collectively referred to as nodes in the embodiments of this application.

[0130] The following describes the system architecture and service scenarios in the embodiments of the present application. It should be noted that the system architecture and service scenarios described in this application are intended to more clearly describe the technical solutions in this application, and do not constitute limitations on the technical solutions provided in this application. With the development of system architecture and the emergence of new service scenarios, those skilled in the art may recognize that the technical solutions provided in this application can also be applied to similar technical problems.

[0131] 1 is a schematic diagram of a possible wireless communication system according to an embodiment of the present application. The wireless communication system includes a first node 101 and a second node 102. The second node 102 modulates data to form symbols based on a modulation mode (specifically further including spectral efficiency, code rate, etc.), and transmits wireless signals through an antenna. The first node 101 demodulates the wireless signals to obtain the transmitted data. The wireless communication link between the first node 101 and the second node 102 may include various types of connection media, and may be short-range connection technologies including, for example, 802.11b / g, Bluetooth, Zigbee, Radio Frequency Identification (RFID), Ultra-Wideband (UWB) technologies, and wireless short-range communication systems (e.g., in-vehicle wireless short-range communication systems), or long-range connection technologies including other radio access technologies such as Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), and Universal Mobile Telecommunications System (UMTS). Of course, there are other wireless communication technologies that may be used to support communication between the first node and the second node.

[0132] In some specific implementation scenarios, the second node may also be referred to as a C node or a control node, and the first node may also be referred to as a T node or a terminal. The transmission link from the C node to the T node may be referred to as a C link or a downlink, and the transmission link from the T node to the C node may be referred to as a T link or an uplink.

[0133] In wireless communication process, communication channel changes randomly, has frequency selectivity and time-varying characteristics. However, with the increasing amount of service types for intelligent terminals, in the data transmission process of multiple service types, how to improve the flexibility and reliability of data transmission is an urgent technical problem to be solved.

[0134] For example, FIG. 2 is a schematic diagram of a wireless communication scenario in a vehicle according to an embodiment of the present application. A microphone 201 supporting wireless communication technology in a vehicle may be regarded as a first node 101, and a cockpit domain controller (CDC) 202 of the vehicle is a control center in an intelligent cabin device and may be regarded as a second node 102. In order to reduce the amount of harnesses in the vehicle, a wireless connection may be established between the CDC 202 and the microphone 201. The CDC 202 may further obtain the audio recorded by the microphone 201 and record the driving process by using wireless communication technology. In another example, a speaker (or referred to as a loudspeaker) 203 supporting wireless communication technology in a vehicle may be regarded as a first node 101, and a wireless connection may be established between the CDC 202 and the speaker 203. In this way, the speaker 203 may receive and play the audio transmitted by the CDC 202. Since the wireless communication channel changes at any time, the modulation and coding mode needs to be dynamically adjusted based on the instantaneous quality of the channel to improve the transmission efficiency and transmission quality of data. For example, when the channel condition is poor, a low-order modulation mode is selected (i.e., the requirement for the signal-to-noise ratio is low, but the transmission rate is also low). When the channel condition is good, a high-order modulation mode may be selected (i.e., the requirement for the signal-to-noise ratio is high, but the transmission rate is also high), so that the transmission capacity of the wireless channel can be properly used.

[0135] 3 is a schematic flow chart of an information transmission method according to an embodiment of the present application. The method includes at least the following steps:

[0136] Optionally, the information transmitting method may include a step S301, which is specifically as follows.

[0137] Step S301: The second node determines a first MCS index based on a SINR indicator. "Optionally" in this specification may be understood as: in actual communication, the second node may determine the first MCS index based on the SINR indicator, or may not determine the first MCS index based on the SINR indicator, or may determine the first MCS index based on the SINR indicator and another parameter reflecting the channel quality (e.g., one or more of reference signal receiving power (RSRP) and reference signal receiving quality (RSRQ)). Determining the first MCS index may specifically depend on the implementation by the second node, pre-agreement, or definition in the standard.

[0138] Specifically, the signal to interference plus noise ratio (SINR) is the ratio between the strength of a received desired signal and the strength of a received interference signal (noise and interference), and can be used to indicate the quality of a channel, including one or more of an uplink channel (e.g., one or more of an uplink data channel, an uplink access channel, and an uplink control channel) and a downlink channel (e.g., one or more of a downlink data channel, a downlink broadcast channel, and a downlink control channel). Also, in some implementation solutions, the channel can be replaced with a link, for example, a C-link or a T-link. The C-link includes a data channel, a broadcast channel, and a control channel (including one or more of a channel used to transmit a Channel State Information-Reference Signal (CSI-RS), a channel used to transmit a Demodulation Reference Signal (DMRS), etc.), and can also be understood as a downlink. The T-link includes a data channel, an access channel, and a control channel (including one or more of a channel used to transmit an Acknowledge Character (ACK), a channel used to transmit a Sounding Reference Signal (SRS), a channel used to transmit a DMRS, etc.), and may also be understood as an uplink. Typically, a larger SINR indicates a stronger received desired signal, better channel quality, and higher communication quality. Correspondingly, a smaller SINR indicates a weaker received desired signal, poorer channel quality, and lower communication quality. Optionally, the SINR indicator may be reported by the first node to the second node or may be obtained (specifically, collected or measured) by the second node.For example, the second node may transmit signal A to the first node through a C-link (or downlink channel). Signal A is transmitted through the C-link. The first node may receive signal A1, and the first node may obtain the SINR of the C-link based on the received signal A1 and the original signal A, and report the SINR to the second node. In this way, the second node obtains the SINR reported by the first node. In another example, the first node transmits signal B to the second node through a T-link (or uplink channel). Correspondingly, signal B is transmitted through the T-link. The second node may receive signal B1, and determine the SINR of the T-link based on the received signal B1 and the original signal B.

[0139] In one design, the second node may determine a first MCS index based on the SINR indicator, the first MCS index corresponding to the first modulation mode.

[0140] Step S302: The second node sends a first MCS index to the first node.

[0141] Specifically, the first MCS index belongs to the first MCS information subset, and the first MCS information subset corresponds to the first modulation mode. For example, the first MCS index is MCS 0, and MCS 0 belongs to the information subset {index: MCS 0, modulation mode: QPSK, code rate: 0.125}. The modulation mode corresponding to MCS 0 is QPSK. For another example, MCS 0 belongs to the information subset {index: MCS 0, modulation order (Qm): 2, spectrum efficiency: 0.250}. Since the modulation order corresponding to QPSK is 2, the modulation order corresponding to 16QAM is 4, the modulation order corresponding to 64QAM is 6, the modulation order corresponding to 256QAM is 8, and the modulation order corresponding to 1024QAM is 10, and the modulation mode corresponding to MCS 0 is the modulation mode with a modulation order of 2, that is, QPSK.

[0142] Furthermore, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set. The predefined MCS information set includes M information subsets, where M is an integer greater than 1. Optionally, M=32. For ease of explanation, the following mainly uses M=32 as an example of explanation. The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and a first modulation mode or a modulation order corresponding to the first modulation mode. In other words, in addition to the first MCS index, the first MCS information subset may further include at least one of a first frequency efficiency or a first code rate, and at least one of a first modulation mode or a modulation order corresponding to the first modulation mode. The first code rate is the ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode. In other words, the product of the first code rate and the modulation order corresponding to the first modulation mode is equal to the spectral efficiency corresponding to the first MCS index. Generally, a smaller MCS index indicates a lower corresponding modulation mode and a lower corresponding spectral efficiency, and a larger MCS index indicates a higher corresponding modulation mode and a higher corresponding spectral efficiency. In another definition method, the change trend of the MCS index may alternatively be opposite to the change trend of the modulation mode and the spectral efficiency. This is not specifically limited in this application. The above general method is used as an example. When the channel condition is poor, the modulation mode and the spectral efficiency corresponding to the smaller MCS index in the 32 MCS information subset may be selected to transmit or receive data. When the channel condition is good, the modulation mode corresponding to the larger MCS index in the 32 MCS information subset may be selected to transmit or receive data. This improves the flexibility of the selection of the modulation mode, maximizes the transmission capacity of the wireless channel, and improves the efficiency and reliability of the data transmission.

[0143] Further, optionally, each MCS information subset in the predefined MCS information set includes a corresponding MCS index, a spectral efficiency and / or a code rate corresponding to the MCS index, and a modulation mode or a modulation order of the modulation mode corresponding to the MCS index. The code rate is a ratio between the spectral efficiency corresponding to the MCS index and the modulation order corresponding to the modulation mode. In other words, the predefined MCS information set includes M (e.g., M=32) information subsets, and each MCS index in the M MCS indexes corresponds to a spectral efficiency or a code rate and a modulation mode or a modulation order of the modulation mode. It can also be understood that the predefined MCS information set includes M MCS information subsets, and the M MCS information subsets do not include a reserved entry. Specifically, there is no spectral efficiency and / or a code rate corresponding to the corresponding MCS index in the reserved entry. In other words, the spectral efficiency and / or the code rate corresponding to the MCS index in the reserved entry is reserved.

[0144] Optionally, the predefined MCS information set includes at least one of: quadrature phase shift keying QPSK, 16 quadrature amplitude modulation QAM, 64QAM, 256QAM, or 1024QAM. Since different nodes support different modulation modes, multiple modulation modes can be used by the node to select a modulation mode and a spectral efficiency corresponding to the modulation based on the modulation mode supported by the node. Usually, a higher order modulation mode (e.g., 1024QAM or 256QAM) has higher transmission efficiency but lower noise resistance, and a lower order modulation mode (e.g., QPSK or 16QAM) has lower transmission efficiency but higher noise resistance. In addition, a higher order modulation mode also has higher device requirements for a transmitting node. The transmitting node can select a modulation mode and a spectral efficiency corresponding to the modulation based on the modulation mode supported by the transmitting node to achieve higher transmission efficiency. For example, a scenario of vehicular wireless communication is significantly different from a traditional communication scenario, e.g., a macro base station or cell, and the channel conditions for vehicular wireless signal transmission are also significantly different. The signal-to-interference-plus-noise ratio (SINR) of the received signal in in-vehicle communication is more ideal in distribution, so a higher-order modulation mode (e.g., 1024QAM) can be introduced for the vehicle (or a specific node in the vehicle) to select.

[0145] In addition, the predefined MCS information set may be stored in a format, such as a table, a set, an array, or JSON data. In a specific implementation process, at least one of the following designs is included.

[0146] Design 1: There are nine MCS information subsets whose modulation mode is QPSK in the predefined MCS information set. Furthermore, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is QPSK is {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate set corresponding to the MCS information subset is {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}. Because the performance difference between different modulation modes is large, the relationship between the signal-to-noise ratio and the block error rate is reflected as the signal-to-noise ratio required by different modulation modes to reach the target block error rate is significantly different. In a communication system, when the performance difference between modulation methods is large, a smaller amount of modulation methods can be selected within the signal-to-noise ratio range to meet the block error rate requirements. In this case, it is difficult to meet user requirements. Therefore, in the above solution, the nine information subsets whose modulation mode is QPSK enable the performance difference between modulation methods to be small, so that the device that supports QPSK can properly select a better modulation method within the signal-to-noise ratio range.

[0147] In addition, optionally, there are four MCS information subsets whose modulation mode is 16QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 16QAM is {1.5273, 1.8008, 2.0781, 2.4023}, or the code rate set corresponding to the MCS information subset is {0.3818, 0.4502, 0.5195, 0.6006}. In this way, the device supporting 16QAM can select the modulation scheme with better performance.

[0148] In addition, optionally, there are 9 MCS information subsets whose modulation mode is 64QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 64QAM is {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate set corresponding to the MCS information subset is {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}. In this way, the device supporting 64QAM can select the modulation scheme with better performance.

[0149] In addition, optionally, there are five MCS information subsets whose modulation mode is 256QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 256QAM is {5.2813, 5.7188, 6.1797, 6.6016, 7.0000}, or the code rate set corresponding to the MCS information subset is {0.6602, 0.7148, 0.7725, 0.8252, 0.8750}. In this way, the device supporting 256QAM can select the modulation scheme with better performance.

[0150] In addition, optionally, there are five MCS information subsets whose modulation mode is 1024QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 1024QAM is {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate set corresponding to the MCS information subset is {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}. In this way, the device supporting 1024QAM can select the modulation scheme with better performance.

[0151] In design, the predefined set may include any one or more MCS information subsets of modulation modes in the MCS information subsets of the multiple modulation modes. For example, the predefined set may include MCS information subsets in which the modulation modes are one or more of QPSK, 16QAM, 64QAM, 256QAM, or 1024QAM.

[0152] Furthermore, optionally, the modulation mode is any one of QPSK, 16QAM, 64QAM, 256QAM, and 1024QAM, and the MCS information subset included in the predefined set may include some or all of the MCS information subsets of the corresponding modulation modes listed above. Specifically, for example, there are five MCS information subsets whose modulation mode is 256QAM and five MCS information subsets whose modulation mode is 1024QAM in the predefined MCS information set. For another example, there are nine MCS information subsets whose modulation mode is QPSK, four MCS information subsets whose modulation mode is 16QAM, nine MCS information subsets whose modulation mode is 64QAM, five MCS information subsets whose modulation mode is 256QAM, and five MCS information subsets whose modulation mode is 1024QAM in the predefined MCS information set.

[0153] Specifically, for example, Table 1 is a possible MCS table provided in this embodiment of the present application. The MCS table includes 32 MCS indexes. In the table, the indexes MCS 0 to MCS 31 (in a specific implementation process, the indexes can alternatively be represented by using 5 bits, for example, "00000" represents MCS 0) are in the first column, the modulation modes (Modulation), including four modulation modes: quadrature phase shift keying QPSK, 16 quadrature amplitude modulation QAM, 64QAM, 256QAM, and 1024QAM, are in the second column, the spectral efficiency (Efficiency) is in the third column, and the code rate (R) is in the fourth column. In Table 1, it can be seen that the modulation mode corresponding to 9 MCS indexes is QPSK, the modulation mode corresponding to 4 MCS indexes is 16QAM, the modulation mode corresponding to 9 MCS indexes is 64QAM, the modulation mode corresponding to 5 MCS indexes is 256QAM, and the modulation mode corresponding to 5 MCS indexes is 1024QAM. Table 1 MCS table [Table 1]

[0154] It should be noted that in the embodiment of the present application, the spectral efficiency values ​​and the code rate values ​​are each accurate to four decimal places. In some possible implementations, there may alternatively be other precisions. For example, FIG. 4 is a schematic diagram of possible MCS according to an embodiment of the present application. The indexes MCS 0 to MCS 31 are in the first column, the modulation mode (Modulation) is in the second column, the spectral efficiency (Efficiency) is in the third column, and the code rate (R) is in the fourth column. The spectral efficiency values ​​are accurate to nine decimal places, and the code rate values ​​are accurate to ten decimal places.

[0155] It can be understood that in the MCS information set shown in Table 1 or FIG. 4, some parameters are converted to other parameters for representation. For example, the modulation mode can be replaced with the modulation order Qm (the modulation order corresponding to QPSK is 2, the modulation order corresponding to 16QAM is 4, the modulation order corresponding to 64QAM is 6, the modulation order corresponding to 256QAM is 8, and the modulation order corresponding to 1024QAM is 10). For another example, the code rate can be replaced with "the length of information bits obtained by calculating the code rate x 1024". For example, FIG. 5 is a schematic diagram of another possible MCS table according to an embodiment of the present application. The indexes MCS 0 to MCS 31 are in the first column, the modulation mode (Modulation) is in the second column, the length of information bits obtained by calculating the code rate x 1024 (also referred to as mother code 1024 in some implementation scenarios) is in the third column, and the spectral efficiency (Efficiency) is in the fourth column. In addition, in some specific implementation scenarios, the information set may further include other information, such as a target block error rate (BLER) (e.g., 10 -3 ) and / or a modulation order and a signal-to-noise ratio (also referred to as signal-to-noise ratio, SNR, or S / N) required during modulation to reach the desired signal-to-noise ratio (Again, examples are not described herein).

[0156] Optionally, in the embodiment of the present application, the MCS information set may alternatively be divided into multiple tables for representation. For example, (a) in Fig. 6 shows the information subset whose index is MCS 0 to MCS 8 and whose modulation mode is QPSK, (b) in Fig. 6 shows the information subset whose index is MCS 9 to MCS 12 and whose modulation mode is 16QAM, (c) in Fig. 6 shows the information subset whose index is MCS 13 to MCS 21 and whose modulation mode is 64QAM, (d) in Fig. 6 shows the information subset whose index is MCS 22 to MCS 26 and whose modulation mode is 256QAM, and (e) in Fig. 6 shows the information subset whose index is MCS 27 to MCS 31 and whose modulation mode is 1024QAM.

[0157] FIG. 7A is a schematic diagram of possible performance of modulation schemes in MCS information set in Design 1 according to one embodiment of the present application, specifically, a schematic diagram of the relationship between BLER and SNR obtained on an Additive White Gaussian Noise (AWGN) channel by modulating a signal by using modulation modes and code rates corresponding to MCS 0 to MCS 31 in Table 1 during encoding by using a polar code having a 1024-bit code length (i.e., 1024-bit length of a data block obtained through encoding).

[0158] 7B is a schematic diagram of another possible performance of a modulation scheme in an MCS information set in Design 1 according to an embodiment of the present application, specifically, a schematic diagram of a relationship between BLER and SNR obtained on an AWGN channel by modulating a signal by using a modulation mode and code rate corresponding to MCS 0 to MCS 31 in Table 1 during encoding by using a polar code having a 2048-bit code length (i.e., a 2048-bit length of a data block obtained through encoding). When a modulation scheme (specifically, including a modulation mode and a spectral efficiency or code rate) corresponding to any MCS index in the 32 MCS information subsets is used to modulate a wireless communication signal, the block error rate (BER) is 10. -3 It can be seen that the signal-to-noise ratio required to reach falls within the interval [-5 dB, 30 dB] (adequate error margins are allowed to account for differences in practical communication scenarios). Furthermore, the performance difference between modulation modes is small, so that a higher order modulation scheme can be selected as possible within any signal-to-noise ratio range falling within [-5 dB, 30 dB] to improve the rate and reliability of data transmission.

[0159] Optionally, for multiple MCS information subsets, the interval between the first reference code rate difference and the difference between the code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to the first code rate threshold. It can be confirmed that the difference between two adjacent code rates is always distributed within a certain range. If the rule is reflected, the difference between two adjacent code rates is always distributed around the first reference code rate difference, and the interval (or deviation) between the difference and the first reference code rate difference is lower than or equal to the first code rate threshold (for example, the first reference code rate difference is 0.07, and the first code rate threshold is 0.045. The difference between two adjacent code rates is always approximately 0.07, and the interval between the difference and 0.07 does not exceed 0.045. In other words, the difference between the code rates falls within the interval [0.025, 0.15]). Therefore, the interval between the code rates is small and uniform. In this way, the highest possible modulation scheme within the signal-to-noise ratio range can be selected to improve the rate and reliability of data transmission.

[0160] It should be noted that the first reference code rate difference is used to describe the code rate distribution rule and may not be a fixed value. The first code rate threshold is used to represent that there may be an error between the reference code rate difference and the difference between the code rates within a small range and may not be a fixed value.

[0161] Alternatively, the code rate corresponding to MCS 0 in Table 1 may be 0.1250 and / or the spectral efficiency corresponding to MCS 0 may be 0.0250, thereby widening the code rate range covered in Table 1 to accommodate some services with lower code rate requirements.

[0162] Design 2: There are four MCS information subsets whose modulation mode is QPSK in the predefined MCS information set. Furthermore, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is QPSK is {0.3086, 0.4453, 0.6309, 0.8652}, or the code rate set corresponding to the MCS information subset is {0.1543, 0.2227, 0.3154, 0.4326}.

[0163] QPSK has good noise resistance but low efficiency of data transmission, so QPSK is usually used on a channel with low SNR. However, since the SNR in some scenarios, such as vehicular wireless channels, is high, the amount of QPSK modulation modes can be reduced or the interval between code rates of QPSK modulation modes can be increased to accommodate scenarios with high SNR. The performance difference between modulation modes that work in low signal-to-noise ratios increases, so that the performance difference between modulation modes that work in high signal-to-noise ratios is reduced to improve the transmission efficiency and reliability of communication systems that work in scenarios with high signal-to-noise ratios.

[0164] In addition, optionally, there are seven MCS information subsets whose modulation mode is 16QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 16QAM is {0.9219, 1.1211, 1.3203, 1.5586, 1.8203, 2.0781, 2.3594}, or the code rate set corresponding to the MCS information subset is {0.2305, 0.2803, 0.3301, 0.3896, 0.4551, 0.5195, 0.5898}. By using the seven information subsets whose modulation mode is 16QAM, the device that supports 16QAM can select a modulation scheme with better performance.

[0165] In addition, optionally, there are 10 MCS information subsets whose modulation mode is 64QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 64QAM is {2.3613, 2.6660, 2.9766, 3.2813, 3.6445, 3.9785, 4.3066, 4.6523, 4.9512, 5.2500}, or the code rate set corresponding to the MCS information subset is {0.3936, 0.4443, 0.4961, 0.5469, 0.6074, 0.6631, 0.7178, 0.7754, 0.8252, 0.8750}. By using the 10 information subsets whose modulation mode is 64QAM, the device that supports 64QAM can select a modulation scheme with better performance.

[0166] In addition, optionally, there are six MCS information subsets whose modulation mode is 256QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 256QAM is {5.2813, 5.6328, 6.0000, 6.3125, 6.6797, 7.0000}, or the code rate set corresponding to the MCS information subset is {0.6602, 0.7041, 0.7500, 0.7891, 0.8350, 0.8750}. By using the six information subsets whose modulation mode is 256QAM, the device that supports 256QAM can select a modulation scheme with better performance.

[0167] In addition, optionally, there are five MCS information subsets whose modulation mode is 1024QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 1024QAM is {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate set corresponding to the MCS information subset is {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}. By using the five information subsets whose modulation mode is 1024QAM, the device that supports 1024QAM can select a modulation scheme with better performance.

[0168] In design, the predefined set may include any one or more MCS information subsets of modulation modes in the MCS information subsets of the multiple modulation modes. For example, the predefined set may include MCS information subsets in which the modulation modes are one or more of QPSK, 16QAM, 64QAM, 256QAM, or 1024QAM.

[0169] Furthermore, optionally, the modulation mode is any one of QPSK, 16QAM, 64QAM, 256QAM, and 1024QAM, and the MCS information subset included in the predefined set may include some or all of the MCS information subsets of the corresponding modulation modes listed above. Specifically, for example, there are six MCS information subsets whose modulation mode is 256QAM in the predefined MCS information set, and five MCS information subsets whose modulation mode is 1024QAM. For another example, there are four MCS information subsets whose modulation mode is QPSK, seven MCS information subsets whose modulation mode is 16QAM, ten MCS information subsets whose modulation mode is 64QAM, six MCS information subsets whose modulation mode is 256QAM, and five MCS information subsets whose modulation mode is 1024QAM in the predefined MCS information set.

[0170] Specifically, for example, Table 2 is another possible MCS table provided in this embodiment of the present application. The MCS table includes 32 MCS indexes. In the MCS table, the modulation mode corresponding to four MCS indexes is QPSK, the modulation mode corresponding to seven MCS indexes is 16QAM, the modulation mode corresponding to ten MCS indexes is 64QAM, the modulation mode corresponding to six MCS indexes is 256QAM, and the modulation mode corresponding to five MCS indexes is 1024QAM. Table 2 MCS table [Table 2]

[0171] It should be noted that in Table 2, the spectral efficiency values ​​and the code rate values ​​are each accurate to four decimal places. In some possible implementations, there may alternatively be other precisions. For example, Figure 8 is a schematic diagram of yet another possible MCS according to an embodiment of the present application. The spectral efficiency values ​​are accurate to nine decimal places, and the code rate values ​​are accurate to ten decimal places.

[0172] It may be understood that in the MCS information set shown in Table 2 or Figures 7A and 7B, some parameters may be replaced with corresponding parameters instead. For example, Figure 9 is a schematic diagram of yet another possible MCS according to an embodiment of the present application. For information on each column, please refer to the related description of Figure 5. In addition, in some specific implementation scenarios, the information set may further include other information, such as a target BLER (e.g., 10 -3 ) may further include at least one of a modulation order and an SNR required to reach

[0173] FIG. 10A is a schematic diagram of possible performance of a modulation scheme in an MCS information set in design 2 according to an embodiment of the present application, specifically, a schematic diagram of a relationship between BLER and SNR obtained on an AWGN channel by modulating a signal by using a modulation mode and a code rate corresponding to MCS 0 to MCS 31 in Table 2 during encoding by using a polar code having a 1024-bit code length. FIG. 10B is a schematic diagram of another possible performance of a modulation scheme in an MCS information set in design 2 according to an embodiment of the present application, specifically, a schematic diagram of a relationship between BLER and SNR obtained on an AWGN channel by modulating a signal by using a modulation mode and a code rate corresponding to MCS 0 to MCS 31 in Table 2 during encoding by using a polar code having a 2048-bit code length. When a modulation scheme (specifically, including a modulation mode and a spectral efficiency or code rate) corresponding to any MCS index in the 32 MCS information subsets is used to modulate a wireless communication signal, the block error rate (BER) of 100% is 100%. -3 It can be seen that the signal-to-noise ratio required to reach lies within the interval [-5 dB, 30 dB] (adequate error margins are allowed, taking into account differences in real communication scenarios).

[0174] In design 2, it is considered that in some scenarios with high signal-to-noise ratio (e.g., in-vehicle communication system), the signal-to-noise ratio is usually higher than 3 dB (usually higher than 10 dB in some scenarios). Therefore, the performance difference between 16QAM and modulation modes beyond it is small, which further reduces the performance difference between modulation modes in any signal-to-noise ratio range falling within [3 dB, 30 dB]. Therefore, to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible within the signal-to-noise ratio range [3 dB, 30 dB].

[0175] In a possible implementation, for information subsets whose modulation mode is 16QAM, 64QAM or 1024QAM in the MCS information set, the interval between the second reference code rate difference and the difference between the code rates corresponding to any two adjacent indexes whose corresponding modulation mode is the same is lower than or equal to the second code rate threshold. Furthermore, the second reference code rate difference is lower than the first reference code rate difference, and the second code rate threshold is lower than the first code rate threshold. Compared with QPSK, 16QAM, 64QAM or 1024QAM has a higher information transmission rate, but has a poorer noise resistance capability, and therefore works on a channel with a high signal-to-noise ratio. However, in a communication scenario, such as in-vehicle communication, the signal-to-noise ratio of the channel is high. Therefore, in this scenario, the interval between the code rates of the information subsets of 16QAM, 64QAM, or 1024QAM may be reduced, so that the performance difference between the modulation modes working in the high signal-to-noise ratio is small, in order to improve the transmission efficiency and reliability of the communication system working in the scenario with a high signal-to-noise ratio. It should be noted that the second reference code rate difference and the second code rate threshold are used to describe the code rate distribution rule and may not be a fixed value. For example, the second reference code rate difference may be 0.055, and the second code rate threshold is 0.02. In this way, the difference between two adjacent code rates falls within the range of [0.035, 0.075], and the performance difference between the modulation modes is small. It should be noted that the second reference code rate difference is used to describe the code rate distribution rule and may not be a fixed value. The second code rate threshold is used to represent that there may be an error between the reference code rate difference and the difference between the code rates in a small range, and may not be a fixed value.

[0176] Design 3: There are four MCS information subsets whose modulation mode is QPSK in the predefined MCS information set. Furthermore, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is QPSK is {0.2617, 0.3828, 0.5469, 0.7578}, or the code rate set corresponding to the MCS information subset is {0.1309, 0.1914, 0.2734, 0.3789}. The performance difference between the modulation modes working in a low signal-to-noise ratio is increased, so that the performance difference between the modulation modes working in a high signal-to-noise ratio is reduced to improve the transmission efficiency and reliability of the communication system working in the scenario with a high signal-to-noise ratio.

[0177] In addition, optionally, there are four MCS information subsets in which the modulation mode is 16QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 16QAM is {0.8008, 1.1211, 1.5000, 1.9219}, or the code rate set corresponding to the MCS information subsets is {0.2002, 0.2803, 0.3750, 0.4805}. The performance difference between the modulation schemes in which the modulation mode is 16QAM is increased, thereby reducing the performance difference between the modulation modes working in a high signal-to-noise ratio, so as to improve the transmission efficiency and reliability of the communication system working in the scenario with a high signal-to-noise ratio.

[0178] In addition, optionally, there are 12 MCS information subsets in which the modulation mode is 64QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 64QAM is {2.0508, 2.3613, 2.6367, 2.9414, 3.2168, 3.5098, 3.8203, 4.1016, 4.4121, 4.6992, 4.9863, 5.2500}, or the code rate set corresponding to the MCS information subset is {0.3418, 0.3936, 0.4395, 0.4902, 0.5361, 0.5850, 0.6367, 0.6836, 0.7354, 0.7832, 0.8311, 0.8750}. The 12 information subsets with the modulation mode of 64QAM make it possible to reduce the performance difference between modulation schemes, so that devices supporting 64QAM can appropriately select a better modulation scheme within the signal-to-noise ratio range.

[0179] In addition, optionally, there are six MCS information subsets whose modulation mode is 256QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 256QAM is {5.2813, 5.6328, 6.0000, 6.3125, 6.6797, 7.0000}, or the code rate set corresponding to the MCS information subset is {0.6602, 0.704, 0.7500, 0.7891, 0.8350, 0.8750}. By using the six information subsets whose modulation mode is 256QAM, the device that supports 256QAM can select a modulation scheme with better performance.

[0180] In addition, optionally, there are six MCS information subsets whose modulation mode is 1024QAM in the predefined MCS information set. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 1024QAM is {7.0313, 7.3730, 7.6953, 8.0957, 8.4570, 8.7500}, or the code rate set corresponding to the MCS information subset is {0.7031, 0.7373, 0.7695, 0.8096, 0.8457, 0.8750}. By using the six information subsets whose modulation mode is 1024QAM, the device that supports 1024QAM can select a modulation scheme with better performance.

[0181] In design, the predefined set may include any one or more MCS information subsets of modulation modes in the MCS information subsets of the multiple modulation modes. For example, the predefined set may include MCS information subsets in which the modulation modes are one or more of QPSK, 16QAM, 64QAM, 256QAM, or 1024QAM.

[0182] Furthermore, optionally, the modulation mode is any one of QPSK, 16QAM, 64QAM, 256QAM, and 1024QAM, and the MCS information subset included in the predefined set may include some or all of the MCS information subsets of the corresponding modulation modes listed above. Specifically, for example, there are six MCS information subsets whose modulation mode is 256QAM and six MCS information subsets whose modulation mode is 1024QAM in the predefined MCS information set. For another example, there are four MCS information subsets whose modulation mode is QPSK, four MCS information subsets whose modulation mode is 16QAM, twelve MCS information subsets whose modulation mode is 64QAM, six MCS information subsets whose modulation mode is 256QAM, and six MCS information subsets whose modulation mode is 1024QAM in the predefined MCS information set.

[0183] Specifically, for example, Table 3 is another possible MCS table provided in this embodiment of the present application. The MCS table includes 32 MCS indexes. In Table 3, it can be seen that the modulation mode corresponding to four MCS indexes is QPSK, the modulation mode corresponding to four MCS indexes is 16QAM, the modulation mode corresponding to twelve MCS indexes is 64QAM, the modulation mode corresponding to six MCS indexes is 256QAM, and the modulation mode corresponding to six MCS indexes is 1024QAM. Table 3 MCS Table [Table 3]

[0184] It should be noted that in Table 3, the spectral efficiency values ​​and the code rate values ​​are each accurate to four decimal places. In some possible implementations, there may alternatively be other precisions. For example, Figure 11 is a schematic diagram of yet another possible MCS according to an embodiment of the present application. The spectral efficiency values ​​are accurate to nine decimal places, and the code rate values ​​are accurate to ten decimal places.

[0185] It may be understood that in the MCS information set shown in Table 3 or FIG. 11, some parameters may be replaced with corresponding parameters instead. For example, FIG. 12 is a schematic diagram of yet another possible MCS according to an embodiment of the present application. For information on each column, please refer to the related description of FIG. 5. In addition, in some specific implementation scenarios, the information set may further include other information, such as a target BLER (e.g., 10 -3 ) may further include at least one of a modulation order and an SNR required to reach

[0186] 13A is a schematic diagram of possible performance of a modulation scheme in an MCS information set in design 3 according to an embodiment of the present application, specifically, a schematic diagram of a relationship between BLER and SNR obtained on an AWGN channel by modulating a signal by using a modulation mode and code rate corresponding to MCS 0 to MCS 31 in Table 3 during encoding by using a polar code with a 1024-bit code length. FIG. 13B is a schematic diagram of another possible performance of a modulation scheme in an MCS information set in design 3 according to an embodiment of the present application, specifically, a schematic diagram of a relationship between BLER and SNR obtained on an AWGN channel by modulating a signal by using a modulation mode and code rate corresponding to MCS 0 to MCS 31 in Table 3 during encoding by using a polar code with a 2048-bit code length. It can be confirmed that when a modulation scheme (specifically including a modulation mode and a spectral efficiency or code rate) corresponding to any MCS index in the 32 MCS information subsets is used to modulate a wireless communication signal, the signal-to-noise ratio required to reach a target block error rate falls within the interval [-5 dB, 30 dB] (a suitable error range is allowed, taking into account differences in actual communication scenarios).

[0187] In design 3, it is considered that in some scenarios (e.g., in-vehicle communication systems) where the signal-to-noise ratio distribution is ideal, for example, in communication scenarios where the signal-to-noise ratio is higher than 10 dB, the performance difference between 64QAM and modulation modes above it is small, so that in any signal-to-noise ratio range falling within [10 dB, 30 dB], the performance difference between modulation modes is further reduced. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible within the signal-to-noise ratio range [3 dB, 30 dB].

[0188] Optionally, there is an information subset in the predefined MCS information set whose code rate is higher than or equal to 0.875. For example, the code rate corresponding to MCS 21 in Table 1 is 0.875. Since there is an information subset in the information set whose code rate is higher than or equal to 0.875, a modulation mode corresponding to the information subset whose code rate is higher than 0.875 can be selected for modulation when the channel quality is good, in order to improve the efficiency of data transmission. Code rate, also called code rate, code efficiency, or code rate, is the proportion of desired data in a data stream. A higher code rate indicates a higher proportion of desired data and a higher information transmission efficiency. Usually, when the channel quality is poor, more redundant information needs to be added to ensure that the receiver can correctly demodulate the signal. In this case, the code rate is low. When the channel quality is good, the signal can be correctly demodulated with very few redundancy check bits. In this case, the code rate is high. Therefore, an appropriate code rate is selected based on the channel variation, so that users with good channel quality can obtain higher information transmission rates.

[0189] Further, optionally, in the information subsets in which the modulation modes in the predefined MCS information set are 1024QAM, 256QAM, and 64QAM, there are information subsets in which the code rate is higher than or equal to 0.875 in the information subsets corresponding to one or more modulation modes. For example, in Table 1, the modulation mode corresponding to MCS 21 is 64QAM, and the code rate corresponding to MCS 21 is 0.875, the modulation mode corresponding to MCS 26 is 256QAM, and the code rate corresponding to MCS 26 is 0.875, and the modulation mode corresponding to MCS 31 is 1024QAM, and the code rate corresponding to MCS 31 is 0.875. In this way, if the highest order modulation mode supported by the node is 64QAM, then if the channel quality is supported, a code rate of 0.875 (or even higher) can be used to modulate the signal to improve the information transmission rate, since 64QAM also has an information subset with a code rate higher than or equal to 0.875. Correspondingly, if the highest order modulation mode supported by the node is 256QAM or 1024QAM, then a code rate of 0.875 (or even higher) can be used to modulate the signal to improve the information transmission rate.

[0190] Optionally, the first MCS index may be indicated by using N bits in a message sent by the second node to the first node. For example, the first index may be indicated by using 5 bits in the message. If the 5 bits in the message are "01100", the first index is MCS 20. Further, optionally, for example, the predefined MCS set is the MCS information table described in Table 1, and the first MCS index is MCS 20. A modulation mode corresponding to MCS 20 is 64QAM, a spectral efficiency corresponding to MCS 20 is 4.9102, and / or a code rate corresponding to MCS 20 is 0.8184.

[0191] It may be understood that the second node transmits the first MCS index to the first node, and in response, the first node receives the first MCS index from the second node.

[0192] Step S303: The first node receives data transmitted by the second node or transmits data to the second node based on the first modulation mode.

[0193] In a possible implementation solution, according to the protocol specification, in the case of a C-link (or downlink channel), the second node transmits a first MCS index to the first node. The second node modulates data into a first modulation mode corresponding to the first index and transmits the modulated signal to the first node. The first node may demodulate the signal from the second node in the first modulation mode corresponding to the MCS index and receive data from the second node. In the case of a T-link (or uplink channel), the second node transmits a first MCS index to the first node, and the first node may modulate data into a first modulation mode corresponding to the first MCS index and transmits the modulated signal to the second node. The second node demodulates the signal from the first node and receives data from the first node.

[0194] For example, the MCS information set is table 1, and the first MCS index is MCS 20. The corresponding first modulation mode is 64QAM. Therefore, when transmitting data to the second node, the first node may modulate the signal to mode 64QAM, and then transmit the modulated signal. Optionally, if the spectral efficiency included in the first information subset in which MCS 20 is located is 4.9102, when the signal is modulated, the signal is modulated by using the spectral efficiency of 4.9102. Alternatively, if the code rate included in the first information subset in which MCS 20 is located is 0.8184, when the signal is modulated, the data is modulated by using the code rate of 0.8184. Then, the modulated signal is transmitted.

[0195] In another example, the MCS information set is Table 1, and the first MCS index is MCS 20. The corresponding first modulation mode is 64QAM. Since the modulation process corresponds to the demodulation process, generally, when the node that transmits data performs modulation using a modulation mode, the node that receives data also performs demodulation using the same modulation mode. Therefore, the first node demodulates the received signal from the second node based on the modulation mode 64QAM and the spectral efficiency of 4.9102 (or the code rate of 0.8184) to receive the data transmitted by the second node.

[0196] Step S304: The second node receives data transmitted by the first node or transmits data to the first node based on the first modulation mode corresponding to the first MCS index.

[0197] For example, the MCS information set is table 1, and the first MCS index is MCS 20. The corresponding first modulation mode is 64QAM. Therefore, when transmitting data to the first node, the second node may modulate the signal to mode 64QAM and then transmit the modulated signal. Optionally, if the spectral efficiency included in the first information subset in which MCS 20 is located is 4.9102, when the signal is modulated, the signal is modulated by using the spectral efficiency of 4.9102. Alternatively, if the code rate included in the first information subset in which MCS 20 is located is 0.8184, when the signal is modulated, the data is modulated by using the code rate of 0.8184. Then, the modulated signal is transmitted.

[0198] In another example, the MCS information set is Table 1, and the first MCS index is MCS 20. The corresponding first modulation mode is 64QAM. The modulation process corresponds to the demodulation process. Therefore, the second node demodulates the received signal based on the modulation mode 64QAM and the spectral efficiency of 4.9102 (or the code rate of 0.8184) to receive the data transmitted by the first node.

[0199] In the embodiment shown in FIG. 3, the first node may receive a first MCS index and transmit or receive data based on a first modulation mode corresponding to the first MCS index. In this way, the modulation scheme (specifically including modulation mode, spectral efficiency, code rate, etc.) may be dynamically adjusted based on different MCS indexes. For example, when the channel condition is poor, the modulation mode (specifically may further include corresponding spectral efficiency or corresponding code rate) corresponding to a smaller MCS index in the 32 MCS information subset may be selected to transmit or receive data. When the channel condition is good, the modulation mode corresponding to a larger MCS index in the 32 MCS information subset may be selected to transmit or receive data. This improves the flexibility of modulation mode selection, maximizes the transmission capacity of the wireless channel, and improves the efficiency and reliability of data transmission.

[0200] As mentioned above, the predefined MCS information set may be stored in a format, such as a table, a set, an array, or JSON data. In yet another optional design, the predefined MCS information set may include:

[0201] design 4

[0202] In one implementation, there are 10 MCS information subsets in which the modulation mode is QPSK in the predefined MCS information set. Furthermore, the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is QPSK is {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate set corresponding to the MCS information subsets is {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}. Since the performance difference between different modulation modes is large, the relationship between the signal-to-noise ratio and the block error rate is reflected as the signal-to-noise ratio required by different modulation modes to reach the target block error rate is significantly different. In a communication system, when the performance difference between modulation schemes is large, a smaller amount of modulation schemes can be selected within the signal-to-noise ratio range to meet the block error rate requirement. In this case, it is difficult to meet the user requirements. Therefore, in the above solution, the above design of the MCS information subset whose modulation mode is QPSK enables the performance difference between modulation schemes to be reduced, so that the device supporting QPSK can properly select a better modulation scheme within the signal-to-noise ratio range. Furthermore, in the above solution, the information subset can implement a maximum code rate of 0.8008 (or a maximum code rate of 0.8008 corresponding to the spectral efficiency), so that the device supporting QPSK can achieve a high throughput.

[0203] For MCS information subsets with a modulation mode of QPSK, alternatively, there are less than or equal to 10 (e.g., any one of 7 to 10) MCS information subsets with a modulation mode of QPSK in the predefined MCS information set. The spectral efficiency set corresponding to the MCS information subset with the modulation mode being QPSK includes the entire set or a subset of the set {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate set corresponding to the MCS information subset includes the entire set or a subset of the set {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}. For example, when the amount of MCS information subsets whose modulation mode is QPSK is one of 7 to 10, the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is QPSK includes a subset of {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, for example, {0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}. For another example, if the amount of MCS information subsets with a modulation mode of QPSK is 10, the spectral efficiency set corresponding to the MCS information subsets with a modulation mode of QPSK includes a proper subset of {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, but not {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}. For a description of the corresponding code rate set, please refer to the description of the corresponding spectral efficiency set.

[0204] In addition, optionally, there are seven MCS information subsets in the predefined MCS information set, where the modulation mode is 16QAM. In addition, the spectral efficiency set corresponding to the MCS information subsets where the modulation mode is 16QAM is {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate set corresponding to the MCS information subsets is {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}. In the above solution, the highest code rate in the information subsets is 0.8857, so that the device supporting 16QAM can achieve high throughput.

[0205] For MCS information subsets with a modulation mode of 16QAM, alternatively there are less than or equal to seven (e.g., four, five, or six) MCS information subsets with a modulation mode of 16QAM in the predefined MCS information set, and / or the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 16QAM include the entire set or a subset of the set {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets include the entire set or a subset of the set {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}. For example, if the amount of MCS information subsets with a modulation mode of 16QAM is 6, the spectral efficiency set corresponding to the MCS information subsets with a modulation mode of QPSK includes a subset of {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, e.g., {2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}. For another example, if the amount of MCS information subsets with modulation mode 16QAM is 7, the spectral efficiency set corresponding to the MCS information subsets with modulation mode QPSK includes the proper subset of {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430} but not {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}.

[0206] In addition, optionally, there are six MCS information subsets in the predefined MCS information set whose modulation mode is 64QAM. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 64QAM is {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate set corresponding to the MCS information subset is {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}. In the above solution, the highest code rate in the information subset is 0.9170, so that the device supporting 64QAM can achieve high throughput.

[0207] For MCS information subsets with a modulation mode of 64QAM, alternatively, there are 6, 7, 8, or 9 MCS information subsets with a modulation mode of 64QAM in the predefined MCS information set, and the spectral efficiency set corresponding to the MCS information subsets with a modulation mode of 64QAM includes the whole set or a subset of the set {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate set corresponding to the MCS information subsets includes the whole set or a subset of the set {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}. For example, if there are eight MCS information subsets with a modulation mode of 64QAM in the predefined MCS information set, then the spectral efficiency set corresponding to the eight MCS information subsets with a modulation mode of 64QAM includes the set {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or includes a proper subset but not the entire set {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}.

[0208] In addition, optionally, there are five MCS information subsets in the predefined MCS information set, where the modulation mode is 256QAM. In addition, the spectral efficiency set corresponding to the MCS information subsets where the modulation mode is 256QAM is {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate set corresponding to the MCS information subsets is {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}. In the above solution, the highest code rate in the information subsets is 0.9150, so that the device supporting 256QAM can achieve high throughput.

[0209] For an MCS information subset with a modulation mode of 256QAM, alternatively, the spectral efficiency set corresponding to the MCS information subset with a modulation mode of 256QAM may include a proper subset of {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate set corresponding to the MCS information subset includes a proper subset of {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}.

[0210] In addition, optionally, there are four MCS information subsets in the predefined MCS information set whose modulation mode is 1024QAM. In addition, the spectral efficiency set corresponding to the MCS information subset whose modulation mode is 1024QAM is {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate set corresponding to the MCS information subset is {0.7500, 0.7930, 0.8359, 0.9229}. In the above solution, the highest code rate in the information subset is 0.9229, so that the device supporting 1024QAM can achieve high throughput.

[0211] For the MCS information subset with a modulation mode of 1024QAM, alternatively, there may be four or five MCS information subsets with a modulation mode of 1024QAM in the predefined MCS information set, and the spectral efficiency set corresponding to the MCS information subset with a modulation mode of 1024QAM includes the entire set or a subset of the set {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate set corresponding to the MCS information subset includes the entire set or a subset of the set {0.7500, 0.7930, 0.8359, 0.9229}. For example, if there are five MCS information subsets with a modulation mode of 1024QAM in a predefined MCS information set, the spectral efficiency set corresponding to the MCS information subsets with a modulation mode of 1024QAM includes the full set or a proper subset of the set {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate set corresponding to the MCS information subsets includes the full set or a proper subset of the set {0.7500, 0.7930, 0.8359, 0.9229}.

[0212] In one implementation, the predefined set may include any one or more MCS information subsets of modulation modes in the MCS information subsets of the multiple modulation modes. For example, the predefined set may include MCS information subsets where the modulation modes are one or more of QPSK, 16QAM, 64QAM, 256QAM, or 1024QAM.

[0213] Furthermore, optionally, the modulation mode is any one of QPSK, 16QAM, 64QAM, 256QAM, and 1024QAM, and the MCS information subsets included in the predefined set may include some or all of the MCS information subsets of the corresponding modulation modes listed above. Specifically, for example, there are five MCS information subsets with a modulation mode of 256QAM and four MCS information subsets with a modulation mode of 1024QAM in the predefined MCS information set. For another example, there are ten MCS information subsets with a modulation mode of QPSK, seven MCS information subsets with a modulation mode of 16QAM, six MCS information subsets with a modulation mode of 64QAM, five MCS information subsets with a modulation mode of 256QAM, and four MCS information subsets with a modulation mode of 1024QAM in the predefined MCS information set.

[0214] Specifically, for example, Table 4 is a possible MCS table provided in this embodiment of the present application. The MCS table includes 32 MCS indexes. In the table, the indexes MCS 0 to MCS 31 (in a specific implementation process, the indexes can alternatively be represented by using 5 bits, for example, "00000" represents MCS 0) are in the first column, the modulation modes (Modulation), including four modulation modes: quadrature phase shift keying QPSK, 16 quadrature amplitude modulation QAM, 64QAM, 256QAM, and 1024QAM, are in the second column, the spectral efficiency (Efficiency) is in the third column, and the code rate (R) is in the fourth column. In Table 4, it can be seen that the modulation mode corresponding to 10 MCS indexes is QPSK, the modulation mode corresponding to 7 MCS indexes is 16QAM, the modulation mode corresponding to 6 MCS indexes is 64QAM, the modulation mode corresponding to 5 MCS indexes is 256QAM, and the modulation mode corresponding to 4 MCS indexes is 1024QAM. Table 4 MCS Table [Table 4]

[0215] It should be noted that in the embodiment of the present application, the spectral efficiency values ​​and the code rate values ​​are each accurate to four decimal places. In some possible implementations, there may alternatively be other precisions. For example, FIG. 17 is a schematic diagram of possible MCS according to an embodiment of the present application. The indexes MCS 0 to MCS 31 are in the first column, the modulation mode (Modulation) is in the second column, the spectral efficiency (Efficiency) is in the third column, and the code rate (R) is in the fourth column. The spectral efficiency values ​​are accurate to nine decimal places, and the code rate values ​​are accurate to ten decimal places.

[0216] It can be understood that in the MCS information set shown in Table 4 or FIG. 17, some parameters are converted to other parameters for representation. For example, the modulation mode can be replaced with the modulation order Qm (the modulation order corresponding to QPSK is 2, the modulation order corresponding to 16QAM is 4, the modulation order corresponding to 64QAM is 6, the modulation order corresponding to 256QAM is 8, and the modulation order corresponding to 1024QAM is 10). For another example, the code rate can be replaced with "the length of information bits obtained by calculating the code rate x 1024". For example, FIG. 18 is a schematic diagram of another possible MCS table according to an embodiment of the present application. The indexes MCS 0 to MCS 31 are in the first column, the modulation mode (Modulation) is in the second column, the length of information bits obtained by calculating the code rate x 1024 (also referred to as mother code 1024 in some implementation scenarios) is in the third column, and the spectral efficiency (Efficiency) is in the fourth column. In addition, in some specific implementation scenarios, the information set may further include other information, such as a target block error rate (BLER) (e.g., 10 -3) and / or a modulation order and a signal-to-noise ratio (also referred to as signal-to-noise ratio, SNR, or S / N) required during modulation to reach the desired signal-to-noise ratio (Again, examples are not described herein).

[0217] Optionally, in the embodiment of the present application, the MCS information set may alternatively be divided into multiple tables for representation. For example, (a) in Figure 19 shows the information subset whose index is MCS 0 to MCS 9 and whose modulation mode is QPSK, (b) in Figure 19 shows the information subset whose index is MCS 10 to MCS 16 and whose modulation mode is 16QAM, (c) in Figure 19 shows the information subset whose index is MCS 17 to MCS 22 and whose modulation mode is 64QAM, (d) in Figure 19 shows the information subset whose index is MCS 23 to MCS 27 and whose modulation mode is 256QAM, and (e) in Figure 19 shows the information subset whose index is MCS 28 to MCS 31 and whose modulation mode is 1024QAM.

[0218] FIG. 20A is a schematic diagram of possible performance of modulation schemes in MCS information set in Design 4 according to one embodiment of the present application, specifically, a schematic diagram of the relationship between BLER and SNR obtained on an Additive White Gaussian Noise (AWGN) channel by modulating a signal by using modulation modes and code rates corresponding to MCS 0 to MCS 31 in Table 4 during encoding by using a polar code having a 1024-bit code length (i.e., 1024-bit length of a data block obtained through encoding).

[0219] 20B is a schematic diagram of another possible performance of a modulation scheme in an MCS information set in Design 4 according to an embodiment of the present application, specifically, a schematic diagram of a relationship between BLER and SNR obtained on an AWGN channel by modulating a signal by using a modulation mode and code rate corresponding to MCS 0 to MCS 31 in Table 4 during encoding by using a polar code having a 4096-bit code length (i.e., a 4096-bit length of a data block obtained through encoding). When a modulation scheme (specifically, including a modulation mode and a spectral efficiency or code rate) corresponding to any MCS index in the 32 MCS information subsets is used to modulate a wireless communication signal, the block error rate (BER) is 10. -3 It can be seen that the signal-to-noise ratio required to reach falls within the interval [-5 dB, 32 dB] (adequate error margins are allowed to account for differences in practical communication scenarios). Furthermore, the performance difference between modulation modes is small, so that a higher order modulation scheme can be selected as possible within any signal-to-noise ratio range falling within [-5 dB, 32 dB] to improve the rate and reliability of data transmission.

[0220] Optionally, for multiple MCS information subsets, the interval between the first reference code rate difference and the difference between the code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to the first code rate threshold. It can be confirmed that the difference between two adjacent code rates is always distributed within a certain range. If the rule is reflected, the difference between two adjacent code rates is always distributed around the first reference code rate difference, and the interval (or deviation) between the difference and the first reference code rate difference is lower than or equal to the first code rate threshold (for example, the first reference code rate difference is 0.07, and the first code rate threshold is 0.045. The difference between two adjacent code rates is always approximately 0.07, and the interval between the difference and 0.07 does not exceed 0.045. In other words, the difference between the code rates falls within the interval [0.025, 0.15]). Therefore, the interval between the code rates is small and uniform. In this way, the highest possible modulation scheme within the signal-to-noise ratio range can be selected to improve the rate and reliability of data transmission.

[0221] It should be noted that the first reference code rate difference is used to describe the code rate distribution rule and may not be a fixed value. The first code rate threshold is used to represent that there may be an error between the reference code rate difference and the difference between the code rates within a small range and may not be a fixed value.

[0222] Alternatively, the code rate corresponding to MCS 0 in Table 4 may be 0.1250 and / or the spectral efficiency corresponding to MCS 0 may be 0.0250, thereby widening the code rate range covered in Table 4 to accommodate some services with lower code rate requirements.

[0223] The above describes in detail the method in the embodiment of the present application. The following describes the apparatus in the embodiment of the present application.

[0224] 14 is a schematic diagram of the structure of an information transmitting device 140 according to an embodiment of the present application. The device 140 may be a node or a component in a node, such as a chip or an integrated circuit. The device 140 may include a communication unit 1401 and a processing unit 1402. The information transmitting device 140 is configured to implement the information transmitting method described above, such as the information transmitting method in the embodiment shown in FIG. 3.

[0225] In a possible implementation, the communication unit 1401 is configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode.

[0226] The processing unit 1402 is configured to receive data from the second node by using the communication unit or transmit data to the second node by using the communication unit based on the first MCS index.

[0227] The first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets.

[0228] The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and a first modulation mode or a modulation order corresponding to the first modulation mode. The first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode.

[0229] The device 140 can receive the MCS index and confirm that it can transmit or receive data based on a first modulation mode corresponding to the first MCS index. In this way, the modulation scheme (specifically including modulation mode, spectral efficiency, code rate, etc.) can be dynamically adjusted based on different MCS indexes. For example, when the channel condition is poor, the modulation mode and spectral efficiency corresponding to a smaller MCS index in the 32 MCS information subset can be selected to transmit or receive data. When the channel condition is good, the modulation mode corresponding to a larger MCS index in the 32 MCS information subset can be selected to transmit or receive data. This improves the flexibility of modulation mode selection, maximizes the transmission capacity of the wireless channel, and improves the efficiency and reliability of data transmission.

[0230] In another possible implementation, the communication unit 1401 is further configured to report a SINR indicator to the second node, and the first MCS index corresponds to the SINR indicator.

[0231] In yet another possible implementation, each MCS information subset in the predefined MCS information set includes a corresponding MCS index, a spectral efficiency and / or a code rate corresponding to the MCS index, and a modulation mode or a modulation order of the modulation mode corresponding to the MCS index. The code rate is the ratio between the spectral efficiency corresponding to the MCS index and the modulation order corresponding to the modulation mode. It may also be understood that the predefined MCS information set does not include reserved entries. For a description of the reserved entries, please refer to the previous description.

[0232] In yet another possible implementation, the predefined MCS information set includes at least one of Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (QAM), 64QAM, 256QAM, or 1024QAM.

[0233] In yet another possible implementation, there are 9 MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}.

[0234] The above describes one possible amount of MCS information subsets where the modulation mode is QPSK in 32 information subsets. Because the performance difference between different modulation modes is large, the relationship between signal-to-noise ratio and block error rate is reflected as the signal-to-noise ratio required by different modulation modes to reach the target block error rate is significantly different. For example, when the code rate is 0.15, a polar code with a 1024-bit code length is 10 -3 Based on the block error rate of 1000 MHz, the QPSK modulation mode requires a signal-to-noise ratio of approximately -4, whereas a polar code with a 1024-bit code length requires a signal-to-noise ratio of approximately -4 under channel conditions with a code rate of 0.35. -3Based on the case where a block error rate of 16QAM is reached, 16QAM requires a signal-to-noise ratio of about 5. The performance difference between the two modulation methods (specifically including modulation mode, and further including code rate or spectrum efficiency) is large. In a communication system, when the performance difference between the modulation methods is large, a smaller amount of modulation methods can be selected within the signal-to-noise ratio range to meet the block error rate requirement. In this case, it is difficult to meet the user requirements. Therefore, in the above solution, the nine information subsets with the modulation mode of QPSK enable the performance difference between the modulation methods to be small, so that the device supporting QPSK can properly select a better modulation method within the signal-to-noise ratio range. Furthermore, in the MCS information subset with the modulation mode of QPSK, the interval between two adjacent code rates is small and uniform. In this way, the highest possible modulation method can be selected within the signal-to-noise ratio range to improve the rate and reliability of data transmission.

[0235] In yet another possible implementation, there are four MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of 16QAM are {1.5273, 1.8008, 2.0781, 2.4023}, or the set of code rates corresponding to the MCS information subsets are {0.3818, 0.4502, 0.5195, 0.6006}.

[0236] The above describes one possible amount of MCS information subsets whose modulation mode is 16QAM in 32 information subsets, and a device that supports 16QAM can select a modulation scheme with better performance by using four information subsets whose modulation mode is 16QAM. Furthermore, in the MCS information subset whose modulation mode is 16QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0237] In yet another possible implementation, there are 9 MCS information subsets in the predefined MCS information set where the modulation mode is 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 64QAM are {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}.

[0238] The above describes one possible amount of MCS information subsets whose modulation mode is 64QAM in 32 information subsets, and a device that supports 64QAM can select a modulation scheme with better performance by using 9 information subsets whose modulation mode is 64QAM. Furthermore, in the MCS information subset whose modulation mode is 64QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0239] In yet another possible implementation, there are five MCS information subsets in the predefined MCS information set where the modulation mode is 256QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 256QAM are {5.2813, 5.7188, 6.1797, 6.6016, 7.0000}, or the code rate sets corresponding to the MCS information subsets are {0.6602, 0.7148, 0.7725, 0.8252, 0.8750}.

[0240] The above describes one possible amount of MCS information subsets whose modulation mode is 256QAM in 32 information subsets, and a device that supports 256QAM can select a modulation scheme with better performance by using 5 information subsets whose modulation mode is 256QAM. Furthermore, in the MCS information subset whose modulation mode is 64QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0241] In yet another possible implementation, there are five MCS information subsets in the predefined MCS information set where the modulation mode is 1024QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is 1024QAM are {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the set of code rates corresponding to the MCS information subsets are {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}.

[0242] The above describes one possible amount of MCS information subsets whose modulation mode is 1024QAM in 32 information subsets, and a device that supports 1024QAM can select a modulation scheme with better performance by using 5 information subsets whose modulation mode is 1024QAM. Furthermore, in the MCS information subset whose modulation mode is 1024QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0243] In yet another possible implementation, there is an information subset in the predefined MCS information set with a code rate higher than or equal to 0.875.

[0244] Code rate, also called code rate, code efficiency, or code rate, is the proportion of desired data in a data stream. A larger code rate indicates a larger proportion of desired data and a higher information transmission efficiency. Usually, when the channel quality is poor, more redundant information needs to be added to ensure that the receiver can correctly demodulate the signal. In this case, the code rate is low. When the channel quality is good, very few redundancy check bits can correctly demodulate the signal. In this case, the code rate is high. Therefore, an appropriate code rate is selected based on the channel variation, so that users with good channel quality can obtain a higher information transmission rate.

[0245] In the above implementation, since there exists an information subset in the information set whose code rate is higher than or equal to 0.875, when the channel quality is good, a modulation mode corresponding to the information subset whose code rate is higher than 0.875 can be selected for modulation to improve the efficiency of data transmission.

[0246] In yet another possible implementation, for information subsets with modulation modes of 1024QAM, 256QAM, and 64QAM in a predefined MCS information set, there are information subsets with a code rate higher than or equal to 0.875 in the information subsets corresponding to one or more modulation modes.

[0247] According to the above implementation, if the highest order modulation mode supported by the node is 64QAM, since 64QAM also has an information subset with a code rate higher than or equal to 0.875, if the channel quality is supported, a code rate of 0.875 (or even higher) can be used to modulate the signal to improve the information transmission rate. Correspondingly, if the highest order modulation mode supported by the node is 256QAM or 1024QAM, a code rate of 0.875 (or even higher) can be used to modulate the signal to improve the information transmission rate.

[0248] In yet another possible implementation, for a plurality of MCS information subsets, the interval between the first reference code rate difference and the difference between the code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a first code rate threshold.

[0249] The above describes the code rate distribution rule between information subsets with the same modulation mode. The difference between two adjacent code rates always distributes within a certain range. When the rule is reflected, the difference between two adjacent code rates always distributes around a first reference code rate difference, and the interval (or deviation) between the difference and the first reference code rate difference is lower than or equal to the first code rate threshold (for example, the first reference code rate difference is 0.07, and the first code rate threshold is 0.045. The difference between two adjacent code rates is always approximately 0.07, and the interval between the difference and 0.07 does not exceed 0.045. In other words, the difference between the code rates falls within the interval [0.025, 0.15]). Therefore, the interval between the code rates is small and uniform. In this way, a high-order modulation scheme can be selected as much as possible within the signal-to-noise ratio range to improve the rate and reliability of data transmission. The first reference code rate difference is used to describe a code rate distribution rule, and may not be a fixed value.

[0250] In yet another possible implementation, there are four MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is QPSK is {0.3086, 0.4453, 0.6309, 0.8652}, or the set of code rates corresponding to the MCS information subsets is {0.1543, 0.2227, 0.3154, 0.4326}.

[0251] The above describes another possible amount of MCS information subsets in which the modulation mode is QPSK in 32 information subsets. Since QPSK has good noise resistance but low efficiency of data transmission, QPSK is usually used on channels with low SNR. However, since the SNR in some scenarios, such as vehicular wireless channels, is high, the amount of QPSK modulation modes can be reduced or the interval between code rates of QPSK modulation modes can be increased to accommodate scenarios with high SNR. The performance difference between modulation modes working in low signal-to-noise ratios is increased, thereby reducing the performance difference between modulation modes working in high signal-to-noise ratios to improve the transmission efficiency and reliability of communication systems working in scenarios with high signal-to-noise ratios.

[0252] In yet another possible implementation, there are seven MCS information subsets in the predefined MCS information set where the modulation mode is 16QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 16QAM are {0.9219, 1.1211, 1.3203, 1.5586, 1.8203, 2.0781, 2.3594}, or the code rate sets corresponding to the MCS information subsets are {0.2305, 0.2803, 0.3301, 0.3896, 0.4551, 0.5195, 0.5898}.

[0253] The above describes one possible amount of MCS information subsets whose modulation mode is 16QAM in 32 information subsets, and a device that supports 16QAM can select a modulation scheme with better performance by using 7 information subsets whose modulation mode is 16QAM. Furthermore, in the MCS information subset whose modulation mode is 16QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0254] In yet another possible implementation, there are 10 MCS information subsets in the predefined MCS information set where the modulation mode is 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 64QAM are {2.3613, 2.6660, 2.9766, 3.2813, 3.6445, 3.9785, 4.3066, 4.6523, 4.9512, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.3936, 0.4443, 0.4961, 0.5469, 0.6074, 0.6631, 0.7178, 0.7754, 0.8252, 0.8750}.

[0255] The above describes one possible amount of MCS information subsets whose modulation mode is 64QAM in 32 information subsets, and a device that supports 64QAM can select a modulation scheme with better performance by using 10 information subsets whose modulation mode is 64QAM. Furthermore, in the MCS information subset whose modulation mode is 64QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0256] In yet another possible implementation, there are six MCS information subsets in the predefined MCS information set where the modulation mode is 256QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is 256QAM are {5.2813, 5.6328, 6.0000, 6.3125, 6.6797, 7.0000}, or the set of code rates corresponding to the MCS information subsets are {0.6602, 0.7041, 0.7500, 0.7891, 0.8350, 0.8750}.

[0257] The above describes one possible amount of MCS information subsets whose modulation mode is 256QAM in 32 information subsets, and a device that supports 256QAM can select a modulation scheme with better performance by using 6 information subsets whose modulation mode is 256QAM. Furthermore, in the MCS information subset whose modulation mode is 256QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0258] In yet another possible implementation, there are five MCS information subsets in the predefined MCS information set where the modulation mode is 1024QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is 1024QAM are {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the set of code rates corresponding to the MCS information subsets are {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}.

[0259] The above describes one possible amount of MCS information subsets whose modulation mode is 1024QAM in 32 information subsets, and a device that supports 1024QAM can select a modulation scheme with better performance by using 5 information subsets whose modulation mode is 1024QAM. Furthermore, in the MCS information subset whose modulation mode is 1024QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0260] In yet another possible implementation, for information subsets in which the modulation mode is 16QAM, 64QAM, or 1024QAM in the MCS information set, the interval between the second reference code rate difference and the difference between the code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a second code rate threshold. Moreover, the second reference code rate difference is lower than the first reference code rate difference, and the second code rate threshold is lower than the first code rate threshold.

[0261] The above describes the code rate distribution rule between information subsets with the same modulation mode in the information subsets with modulation mode of 16QAM, 64QAM or 1024QAM. Compared with QPSK, 16QAM, 64QAM or 1024QAM has higher information transmission rate, but has poorer noise resistance capability, and therefore works on a channel with high signal-to-noise ratio. However, in a communication scenario, such as in-vehicle communication, the signal-to-noise ratio of the channel is high. Therefore, in this scenario, the interval between the code rates of the information subsets of 16QAM, 64QAM or 1024QAM can be reduced, so that the performance difference between the modulation modes working in high signal-to-noise ratio is small, in order to improve the transmission efficiency and reliability of the communication system working in the scenario with high signal-to-noise ratio.

[0262] It should be noted that the second reference code rate difference and the second code rate threshold are used to describe the code rate distribution rule and may not be fixed values. For example, the second reference code rate difference may be 0.055, and the second code rate threshold is 0.02. In this way, the difference between two adjacent code rates falls within the range [0.035, 0.075], and the performance difference between modulation modes is small.

[0263] In yet another possible implementation, there are four MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is QPSK is {0.2617, 0.3828, 0.5469, 0.7578}, or the set of code rates corresponding to the MCS information subsets is {0.1309, 0.1914, 0.2734, 0.3789}.

[0264] The above describes yet another possible amount of MCS information subsets with modulation mode QPSK in 32 information subsets, where the performance difference between modulation modes working at low signal-to-noise ratios is increased, thereby reducing the performance difference between modulation modes working at high signal-to-noise ratios, in order to improve the transmission efficiency and reliability of the communication system working in scenarios with high signal-to-noise ratios.

[0265] In yet another possible implementation, there are four MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of 16QAM are {0.8008, 1.1211, 1.5000, 1.9219}, or the set of code rates corresponding to the MCS information subsets are {0.2002, 0.2803, 0.3750, 0.4805}.

[0266] The above describes yet another possible amount of MCS information subsets with modulation mode 16QAM in 32 information subsets, where the performance difference between modulation schemes with modulation mode 16QAM increases, thereby reducing the performance difference between modulation modes working in high signal-to-noise ratios, in order to improve the transmission efficiency and reliability of communication systems working in scenarios with high signal-to-noise ratios.

[0267] In yet another possible implementation, there are 12 MCS information subsets in the predefined MCS information set where the modulation mode is 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 64QAM are {2.0508, 2.3613, 2.6367, 2.9414, 3.2168, 3.5098, 3.8203, 4.1016, 4.4121, 4.6992, 4.9863, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.3418, 0.3936, 0.4395, 0.4902, 0.5361, 0.5850, 0.6367, 0.6836, 0.7354, 0.7832, 0.8311, 0.8750}.

[0268] The above describes yet another possible amount of MCS information subsets with modulation mode 16QAM in 32 information subsets, where 12 information subsets with modulation mode 16QAM allow reducing the performance difference between modulation schemes, so that devices supporting 16QAM can appropriately select a better modulation scheme within the signal-to-noise ratio range.

[0269] In yet another possible implementation, there are six MCS information subsets in the predefined MCS information set where the modulation mode is 256QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is 256QAM are {5.2813, 5.6328, 6.0000, 6.3125, 6.6797, 7.0000}, or the set of code rates corresponding to the MCS information subsets are {0.6602, 0.704, 0.7500, 0.7891, 0.8350, 0.8750}.

[0270] The above describes one possible amount of MCS information subsets with modulation mode 256QAM in 32 information subsets, and 6 information subsets with modulation mode 256QAM allow the performance difference between modulation schemes to be small, so that devices supporting 256QAM can appropriately select a better modulation scheme within the signal-to-noise ratio range. Furthermore, in the MCS information subsets with modulation mode 256QAM, the interval between two adjacent code rates is small and uniform. In this way, the highest possible modulation scheme can be selected within the signal-to-noise ratio range to improve the rate and reliability of data transmission.

[0271] In yet another possible implementation, there are six MCS information subsets in the predefined MCS information set where the modulation mode is 1024QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is 1024QAM are {7.0313, 7.3730, 7.6953, 8.0957, 8.4570, 8.7500}, or the set of code rates corresponding to the MCS information subsets are {0.7031, 0.7373, 0.7695, 0.8096, 0.8457, 0.8750}.

[0272] The above describes one possible amount of MCS information subsets whose modulation mode is 1024QAM in 32 information subsets, and the 6 information subsets whose modulation mode is 1024QAM allow the performance difference between modulation schemes to be small, so that the device supporting 1024QAM can appropriately select a better modulation scheme within the signal-to-noise ratio range. Furthermore, in the MCS information subsets whose modulation mode is 1024QAM, the interval between two adjacent code rates is small and uniform. In this way, the highest possible modulation scheme can be selected within the signal-to-noise ratio range to improve the rate and reliability of data transmission.

[0273] Referring to Design 4 in the embodiment of the method, in a possible implementation, there are 10 MCS information subsets in which the modulation mode is QPSK in the predefined MCS information set, and the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}.

[0274] Further, optionally, there are seven MCS information subsets in the predefined MCS information set where the modulation mode is 16QAM, and the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 16QAM are {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets are {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}.

[0275] Further, optionally, there are six MCS information subsets in the predefined MCS information set where the modulation mode is 64QAM, and the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 64QAM are {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate sets corresponding to the MCS information subsets are {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}.

[0276] Further, optionally, there are five MCS information subsets in the predefined MCS information set where the modulation mode is 256QAM, and the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 256QAM are {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate sets corresponding to the MCS information subsets are {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}.

[0277] Further, optionally, there are four MCS information subsets in the predefined MCS information set where the modulation mode is 1024QAM, and the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 1024QAM are {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate sets corresponding to the MCS information subsets are {0.7500, 0.7930, 0.8359, 0.9229}.

[0278] A modulation mode and a spectral efficiency or code rate corresponding to any MCS index in the 32 MCS information subsets may be used to modulate a wireless communication signal, and the signal-to-noise ratio required to reach a target block error rate may be within the interval [-5 dB, 30 dB] or [-5 dB, 32 dB].

[0279] It should be noted that for the implementation of each unit, refer to the corresponding description of the embodiment shown in Figure 3. The information sending device 140 may be the first node in the embodiment shown in Figure 3.

[0280] It should be understood that in the embodiments of the device of the present application, the division into multiple units or modules is merely a logical division based on functions, and is not intended to limit the specific structure of the device. In a particular implementation, some functional modules may be further divided into finer functional modules, and some functional modules may be combined into one functional module. However, regardless of whether the functional modules are further divided or combined, the overall procedure performed by the device 140 in the data communication process is the same. For example, the communication unit in the device 140 may alternatively be divided into a receiving unit and a sending unit. The receiving unit is configured to implement the function of transmitting data in the communication process, and the sending unit is configured to implement the function of transmitting data in the communication process. Typically, each unit corresponds to a respective program code (or program instruction). When the program code corresponding to the unit is executed on the processor, the unit executes the corresponding procedure under the control of the processing unit to implement the corresponding function.

[0281] 15 is a schematic diagram of the structure of an information transmitting device 150 according to an embodiment of the present application. The device 150 may be a node or a component in a node, such as a chip or an integrated circuit. The device 150 may include a communication unit 1501 and a processing unit 1502. The information transmitting device 150 is configured to implement the information transmitting method described above, such as the information transmitting method in the embodiment shown in FIG. 3.

[0282] In a possible implementation, the communication unit 1501 is configured to transmit a first modulation and coding scheme (MCS) index to the first node, where the first MCS index corresponds to a first modulation mode.

[0283] The processing unit 1502 is configured to receive data from the first node by using the communication unit, or to transmit data to the first node based on the first modulation mode by using the communication unit.

[0284] The first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets.

[0285] The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and a first modulation mode or a modulation order corresponding to the first modulation mode. The first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode.

[0286] The information transmitting device 150 can determine an MCS index, transmit the MCS index to the first node, and confirm that data can be transmitted or received based on a first modulation mode corresponding to the first MCS index. In this way, the modulation scheme (specifically including modulation mode, spectral efficiency, code rate, etc.) can be dynamically adjusted based on different MCS indexes. For example, when the channel condition is poor, a modulation mode and spectral efficiency corresponding to a smaller MCS index in the 32 MCS information subsets can be selected to transmit or receive data. When the channel condition is good, a modulation mode corresponding to a larger MCS index in the 32 MCS information subsets can be selected to transmit or receive data. This improves the flexibility of modulation mode selection, maximizes the transmission capacity of the wireless channel, and improves the efficiency and reliability of data transmission.

[0287] In another possible implementation, the communication unit 1501 is further configured to receive a signal to interference plus noise ratio SINR indicator reported by the first node.

[0288] The processing unit 1502 is further configured to determine a first MCS index based on the SINR indicator.

[0289] Since the wireless communication channel varies randomly, the first node may report a SINR indicator, which may correspond to the channel quality, thereby enabling the second node to determine that it can dynamically adjust the modulation and coding mode based on the channel quality in order to change the transmission rate.

[0290] In yet another possible implementation, each MCS information subset in the predefined MCS information set includes a corresponding MCS index, a spectral efficiency and / or a code rate corresponding to the MCS index, and a modulation mode or a modulation order of the modulation mode corresponding to the MCS index. The code rate is the ratio between the spectral efficiency corresponding to the MCS index and the modulation order corresponding to the modulation mode. It may also be understood that the predefined MCS information set does not include reserved entries. For a description of the reserved entries, please refer to the previous description.

[0291] In yet another possible implementation, the predefined MCS information set includes at least one of quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), 64QAM, 256QAM, or 1024QAM.

[0292] In yet another possible implementation, there are 9 MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}.

[0293] The above describes one possible amount of MCS information subsets where the modulation mode is QPSK in 32 information subsets. Because the performance difference between different modulation modes is large, the relationship between signal-to-noise ratio and block error rate is reflected as the signal-to-noise ratio required by different modulation modes to reach the target block error rate is significantly different. For example, when the code rate is 0.15, a polar code with a 1024-bit code length is 10 -3 Based on the block error rate of 100 MHz, the QPSK modulation mode requires a signal-to-noise ratio of approximately -4, whereas a polar code with a 1024-bit code length requires a signal-to-noise ratio of approximately -4 under channel conditions with a code rate of 0.35. -3Based on the case where a block error rate of 16QAM is reached, 16QAM requires a signal-to-noise ratio of about 5. The performance difference between the two modulation methods (specifically including modulation mode, and further including code rate or spectrum efficiency) is large. In a communication system, when the performance difference between the modulation methods is large, a smaller amount of modulation methods can be selected within the signal-to-noise ratio range to meet the block error rate requirement. In this case, it is difficult to meet the user requirements. Therefore, in the above solution, the nine information subsets with the modulation mode of QPSK enable the performance difference between the modulation methods to be small, so that the device supporting QPSK can properly select a better modulation method within the signal-to-noise ratio range. Furthermore, in the MCS information subset with the modulation mode of QPSK, the interval between two adjacent code rates is small and uniform. In this way, the highest possible modulation method can be selected within the signal-to-noise ratio range to improve the rate and reliability of data transmission.

[0294] In yet another possible implementation, there are four MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of 16QAM are {1.5273, 1.8008, 2.0781, 2.4023}, or the set of code rates corresponding to the MCS information subsets are {0.3818, 0.4502, 0.5195, 0.6006}.

[0295] The above describes one possible amount of MCS information subsets whose modulation mode is 16QAM in 32 information subsets, and a device that supports 16QAM can select a modulation scheme with better performance by using four information subsets whose modulation mode is 16QAM. Furthermore, in the MCS information subset whose modulation mode is 16QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0296] In yet another possible implementation, there are 9 MCS information subsets in the predefined MCS information set where the modulation mode is 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 64QAM are {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}.

[0297] The above describes one possible amount of MCS information subsets whose modulation mode is 64QAM in 32 information subsets, and a device that supports 64QAM can select a modulation scheme with better performance by using 9 information subsets whose modulation mode is 64QAM. Furthermore, in the MCS information subset whose modulation mode is 64QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0298] In yet another possible implementation, there are five MCS information subsets in the predefined MCS information set where the modulation mode is 256QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 256QAM are {5.2813, 5.7188, 6.1797, 6.6016, 7.0000}, or the code rate sets corresponding to the MCS information subsets are {0.6602, 0.7148, 0.7725, 0.8252, 0.8750}.

[0299] The above describes one possible amount of MCS information subsets whose modulation mode is 256QAM in 32 information subsets, and a device that supports 256QAM can select a modulation scheme with better performance by using 5 information subsets whose modulation mode is 256QAM. Furthermore, in the MCS information subset whose modulation mode is 64QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0300] In yet another possible implementation, there are five MCS information subsets in the predefined MCS information set where the modulation mode is 1024QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is 1024QAM are {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the set of code rates corresponding to the MCS information subsets are {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}.

[0301] The above describes one possible amount of MCS information subsets whose modulation mode is 1024QAM in 32 information subsets, and a device that supports 1024QAM can select a modulation scheme with better performance by using 5 information subsets whose modulation mode is 1024QAM. Furthermore, in the MCS information subset whose modulation mode is 1024QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0302] In yet another possible implementation, there is an information subset in the predefined MCS information set with a code rate higher than or equal to 0.875.

[0303] Code rate, also called code rate, code efficiency, or code rate, is the proportion of desired data in a data stream. A larger code rate indicates a larger proportion of desired data and a higher information transmission efficiency. Usually, when the channel quality is poor, more redundant information needs to be added to ensure that the receiver can correctly demodulate the signal. In this case, the code rate is low. When the channel quality is good, very few redundancy check bits can correctly demodulate the signal. In this case, the code rate is high. Therefore, an appropriate code rate is selected based on the channel variation, so that users with good channel quality can obtain a higher information transmission rate.

[0304] In the above implementation, since there exists an information subset in the information set whose code rate is higher than or equal to 0.875, when the channel quality is good, a modulation mode corresponding to the information subset whose code rate is higher than 0.875 can be selected for modulation to improve the efficiency of data transmission.

[0305] In yet another possible implementation, for information subsets with modulation modes of 1024QAM, 256QAM, and 64QAM in a predefined MCS information set, there are information subsets with a code rate higher than or equal to 0.875 in the information subsets corresponding to one or more modulation modes.

[0306] According to the above implementation, if the highest order modulation mode supported by the node is 64QAM, since 64QAM also has an information subset with a code rate higher than or equal to 0.875, if the channel quality is supported, a code rate of 0.875 (or even higher) can be used to modulate the signal to improve the information transmission rate. Correspondingly, if the highest order modulation mode supported by the node is 256QAM or 1024QAM, a code rate of 0.875 (or even higher) can be used to modulate the signal to improve the information transmission rate.

[0307] In yet another possible implementation, for a plurality of MCS information subsets, the interval between the first reference code rate difference and the difference between the code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a first code rate threshold.

[0308] The above describes the code rate distribution rule between information subsets with the same modulation mode. The difference between two adjacent code rates always distributes within a certain range. When the rule is reflected, the difference between two adjacent code rates always distributes around a first reference code rate difference, and the interval (or deviation) between the difference and the first reference code rate difference is lower than or equal to the first code rate threshold (for example, the first reference code rate difference is 0.07, and the first code rate threshold is 0.045. The difference between two adjacent code rates is always approximately 0.07, and the interval between the difference and 0.07 does not exceed 0.045. In other words, the difference between the code rates falls within the interval [0.025, 0.15]). Therefore, the interval between the code rates is small and uniform. In this way, a high-order modulation scheme can be selected as much as possible within the signal-to-noise ratio range to improve the rate and reliability of data transmission. The first reference code rate difference is used to describe a code rate distribution rule, and may not be a fixed value.

[0309] In yet another possible implementation, there are four MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is QPSK is {0.3086, 0.4453, 0.6309, 0.8652}, or the set of code rates corresponding to the MCS information subsets is {0.1543, 0.2227, 0.3154, 0.4326}.

[0310] The above describes another possible amount of MCS information subsets in which the modulation mode is QPSK in 32 information subsets. Since QPSK has good noise resistance but low efficiency of data transmission, QPSK is usually used on channels with low SNR. However, since the SNR in some scenarios, such as vehicular wireless channels, is high, the amount of QPSK modulation modes can be reduced or the interval between code rates of QPSK modulation modes can be increased to accommodate scenarios with high SNR. The performance difference between modulation modes working in low signal-to-noise ratios is increased, thereby reducing the performance difference between modulation modes working in high signal-to-noise ratios to improve the transmission efficiency and reliability of communication systems working in scenarios with high signal-to-noise ratios.

[0311] In yet another possible implementation, there are seven MCS information subsets in the predefined MCS information set where the modulation mode is 16QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 16QAM are {0.9219, 1.1211, 1.3203, 1.5586, 1.8203, 2.0781, 2.3594}, or the code rate sets corresponding to the MCS information subsets are {0.2305, 0.2803, 0.3301, 0.3896, 0.4551, 0.5195, 0.5898}.

[0312] The above describes one possible amount of MCS information subsets whose modulation mode is 16QAM in 32 information subsets, and a device that supports 16QAM can select a modulation scheme with better performance by using 7 information subsets whose modulation mode is 16QAM. Furthermore, in the MCS information subset whose modulation mode is 16QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0313] In yet another possible implementation, there are 10 MCS information subsets in the predefined MCS information set where the modulation mode is 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 64QAM are {2.3613, 2.6660, 2.9766, 3.2813, 3.6445, 3.9785, 4.3066, 4.6523, 4.9512, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.3936, 0.4443, 0.4961, 0.5469, 0.6074, 0.6631, 0.7178, 0.7754, 0.8252, 0.8750}.

[0314] The above describes one possible amount of MCS information subsets whose modulation mode is 64QAM in 32 information subsets, and a device that supports 64QAM can select a modulation scheme with better performance by using 10 information subsets whose modulation mode is 64QAM. Furthermore, in the MCS information subset whose modulation mode is 64QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0315] In yet another possible implementation, there are six MCS information subsets in the predefined MCS information set where the modulation mode is 256QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is 256QAM are {5.2813, 5.6328, 6.0000, 6.3125, 6.6797, 7.0000}, or the set of code rates corresponding to the MCS information subsets are {0.6602, 0.7041, 0.7500, 0.7891, 0.8350, 0.8750}.

[0316] The above describes one possible amount of MCS information subsets whose modulation mode is 256QAM in 32 information subsets, and a device that supports 256QAM can select a modulation scheme with better performance by using 6 information subsets whose modulation mode is 256QAM. Furthermore, in the MCS information subset whose modulation mode is 256QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0317] In yet another possible implementation, there are five MCS information subsets in the predefined MCS information set where the modulation mode is 1024QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is 1024QAM are {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the set of code rates corresponding to the MCS information subsets are {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}.

[0318] The above describes one possible amount of MCS information subsets whose modulation mode is 1024QAM in 32 information subsets, and a device that supports 1024QAM can select a modulation scheme with better performance by using 5 information subsets whose modulation mode is 1024QAM. Furthermore, in the MCS information subset whose modulation mode is 1024QAM, the interval between two adjacent code rates is small and uniform. Therefore, in order to improve the rate and reliability of data transmission, a high-order modulation scheme can be selected as much as possible when the modulation scheme is determined.

[0319] In yet another possible implementation, for information subsets in which the modulation mode is 16QAM, 64QAM, or 1024QAM in the MCS information set, the interval between the second reference code rate difference and the difference between the code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a second code rate threshold. Moreover, the second reference code rate difference is lower than the first reference code rate difference, and the second code rate threshold is lower than the first code rate threshold.

[0320] The above describes the code rate distribution rule between information subsets with the same modulation mode in the information subsets with modulation mode of 16QAM, 64QAM or 1024QAM. Compared with QPSK, 16QAM, 64QAM or 1024QAM has higher information transmission rate, but has poorer noise resistance capability, and therefore works on a channel with high signal-to-noise ratio. However, in a communication scenario, such as in-vehicle communication, the signal-to-noise ratio of the channel is high. Therefore, in this scenario, the interval between the code rates of the information subsets of 16QAM, 64QAM or 1024QAM can be reduced, so that the performance difference between the modulation modes working in high signal-to-noise ratio is small, in order to improve the transmission efficiency and reliability of the communication system working in the scenario with high signal-to-noise ratio.

[0321] It should be noted that the second reference code rate difference and the second code rate threshold are used to describe the code rate distribution rule and may not be fixed values. For example, the second reference code rate difference may be 0.055, and the second code rate threshold is 0.02. In this way, the difference between two adjacent code rates falls within the range [0.035, 0.075], and the performance difference between modulation modes is small.

[0322] In yet another possible implementation, there are four MCS information subsets in the predefined MCS information set where the modulation mode is QPSK, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is QPSK is {0.2617, 0.3828, 0.5469, 0.7578}, or the set of code rates corresponding to the MCS information subsets is {0.1309, 0.1914, 0.2734, 0.3789}.

[0323] The above describes yet another possible amount of MCS information subsets with modulation mode QPSK in 32 information subsets, where the performance difference between modulation modes working at low signal-to-noise ratios is increased, thereby reducing the performance difference between modulation modes working at high signal-to-noise ratios, in order to improve the transmission efficiency and reliability of the communication system working in scenarios with high signal-to-noise ratios.

[0324] In yet another possible implementation, there are four MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets with a modulation mode of 16QAM are {0.8008, 1.1211, 1.5000, 1.9219}, or the set of code rates corresponding to the MCS information subsets are {0.2002, 0.2803, 0.3750, 0.4805}.

[0325] The above describes yet another possible amount of MCS information subsets with modulation mode 16QAM in 32 information subsets, where the performance difference between modulation schemes with modulation mode 16QAM increases, thereby reducing the performance difference between modulation modes working in high signal-to-noise ratios, in order to improve the transmission efficiency and reliability of communication systems working in scenarios with high signal-to-noise ratios.

[0326] In yet another possible implementation, there are 12 MCS information subsets in the predefined MCS information set where the modulation mode is 64QAM, and / or the spectral efficiency sets corresponding to the MCS information subsets where the modulation mode is 64QAM are {2.0508, 2.3613, 2.6367, 2.9414, 3.2168, 3.5098, 3.8203, 4.1016, 4.4121, 4.6992, 4.9863, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.3418, 0.3936, 0.4395, 0.4902, 0.5361, 0.5850, 0.6367, 0.6836, 0.7354, 0.7832, 0.8311, 0.8750}.

[0327] The above describes yet another possible amount of MCS information subsets with modulation mode 16QAM in 32 information subsets, where 12 information subsets with modulation mode 16QAM allow reducing the performance difference between modulation schemes, so that devices supporting 16QAM can appropriately select a better modulation scheme within the signal-to-noise ratio range.

[0328] In yet another possible implementation, there are six MCS information subsets in the predefined MCS information set where the modulation mode is 256QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is 256QAM are {5.2813, 5.6328, 6.0000, 6.3125, 6.6797, 7.0000}, or the set of code rates corresponding to the MCS information subsets are {0.6602, 0.704, 0.7500, 0.7891, 0.8350, 0.8750}.

[0329] The above describes one possible amount of MCS information subsets with modulation mode 256QAM in 32 information subsets, and 6 information subsets with modulation mode 256QAM allow the performance difference between modulation schemes to be small, so that devices supporting 256QAM can appropriately select a better modulation scheme within the signal-to-noise ratio range. Furthermore, in the MCS information subsets with modulation mode 256QAM, the interval between two adjacent code rates is small and uniform. In this way, the highest possible modulation scheme can be selected within the signal-to-noise ratio range to improve the rate and reliability of data transmission.

[0330] In yet another possible implementation, there are six MCS information subsets in the predefined MCS information set where the modulation mode is 1024QAM, and / or the set of spectral efficiencies corresponding to the MCS information subsets where the modulation mode is 1024QAM are {7.0313, 7.3730, 7.6953, 8.0957, 8.4570, 8.7500}, or the set of code rates corresponding to the MCS information subsets are {0.7031, 0.7373, 0.7695, 0.8096, 0.8457, 0.8750}.

[0331] The above describes one possible amount of MCS information subsets whose modulation mode is 1024QAM in 32 information subsets, and the 6 information subsets whose modulation mode is 1024QAM allow the performance difference between modulation schemes to be small, so that the device supporting 1024QAM can appropriately select a better modulation scheme within the signal-to-noise ratio range. Furthermore, in the MCS information subsets whose modulation mode is 1024QAM, the interval between two adjacent code rates is small and uniform. In this way, the highest possible modulation scheme can be selected within the signal-to-noise ratio range to improve the rate and reliability of data transmission.

[0332] Referring to Design 4 in the embodiment of the method, in a possible implementation, there are 10 MCS information subsets in which the modulation mode is QPSK in the predefined MCS information set, and the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}.

[0333] There are seven MCS information subsets in the predefined MCS information set whose modulation mode is 16QAM, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is 16QAM are {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets are {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}.

[0334] There are six MCS information subsets in the predefined MCS information set whose modulation mode is 64QAM, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is 64QAM are {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate sets corresponding to the MCS information subsets are {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}.

[0335] There are five MCS information subsets in the predefined MCS information set whose modulation mode is 256QAM, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is 256QAM are {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate sets corresponding to the MCS information subsets are {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}.

[0336] In the predefined MCS information set, there are four MCS information subsets whose modulation mode is 1024QAM, and the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 1024QAM is {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate set corresponding to the MCS information subsets is {0.7500, 0.7930, 0.8359, 0.9229}.

[0337] In yet another possible implementation, when a modulation mode and spectral efficiency or code rate corresponding to any MCS index in the 32 MCS information subset is used to modulate a wireless communication signal, the signal-to-noise ratio required to reach the target block error rate falls within the interval [-5 dB, 30 dB] or [-5 dB, 32 dB].

[0338] It should be noted that for the implementation of each unit, refer to the corresponding description of the embodiment shown in Figure 3. The information sending device 150 may be the second node in the embodiment shown in Figure 3.

[0339] 16 is a schematic diagram of the structure of an information transmission device 160 according to an embodiment of the present application. The information transmission device 160 may be a node or a component in a node, for example, a chip or an integrated circuit. The device 160 may include at least one processor 1602 and a communication interface 1604. In addition, optionally, the information transmission device may further include at least one memory 1601. In addition, optionally, a bus 1603 may further be included. The memory 1601, the processor 1602, and the communication interface 1604 are connected through the bus 1603.

[0340] The memory 1601 is configured to provide a storage space, which may store data such as an operating system and computer programs, etc. The memory 1601 may be one or a combination of random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), compact disc read-only memory (CD-ROM), etc.

[0341] The processor 1602 is a module that performs arithmetic and / or logical operations, and may be one or a combination of processing modules such as a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor unit (MPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a complex programmable logic device (CPLD), a co-processor (which assists the central processing unit in completing corresponding processes and applications), and a microcontroller unit (MCU).

[0342] The communication interface 1604 may be configured to provide information input or output for at least one processor, and / or the communication interface may be configured to receive data transmitted from the outside and / or transmit data to the outside, and may be, for example, a wired link interface including an Ethernet cable or the like, or a wireless link interface (such as Wi-Fi, Bluetooth, universal wireless transmission, in-vehicle short-range communication technology, etc.). Optionally, the communication interface 1604 may further comprise a transmitter (e.g., a radio frequency transmitter or antenna), a receiver, etc. coupled thereto.

[0343] The processor 1602 in the device 160 is configured to read a computer program stored in the memory 1601 to execute the information transmission method described above, for example the information transmission method described in the embodiment shown in FIG.

[0344] For example, the information sending device 160 may be the first node in the embodiment shown in Fig. 3. The processor 1602 in the device 160 is configured to read a computer program stored in the memory 1601 to perform the following operations: receiving a first modulation and coding scheme (MCS) index from a second node over the communication interface 1604, where the first MCS index corresponds to a first modulation mode; and receiving data from a second node by using the communication unit based on the first MCS index, or transmitting data to the second node by using the communication unit;

[0345] The first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets.

[0346] The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and a first modulation mode or a modulation order corresponding to the first modulation mode. The first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode.

[0347] The device 160 can receive the MCS index and confirm that the data can be transmitted or received based on the first modulation mode corresponding to the first MCS index. In this way, the modulation scheme (specifically including the modulation mode, the spectrum efficiency, the code rate, etc.) can be dynamically adjusted based on the different MCS index. For example, when the channel condition is poor, the modulation mode and the spectrum efficiency corresponding to the smaller MCS index in the 32 MCS information subset can be selected to transmit or receive the data. When the channel condition is good, the modulation mode corresponding to the larger MCS index in the 32 MCS information subset can be selected to transmit or receive the data. This improves the flexibility of the modulation mode selection, maximizes the transmission capacity of the wireless channel, and improves the efficiency and reliability of the data transmission.

[0348] In a possible implementation, the processor is further configured to report the SINR indicator to the second node through the communication interface 1604, and the first MCS index corresponds to the SINR indicator.

[0349] Since the wireless communication channel varies randomly, the aforementioned device may report a SINR indicator, which may correspond to the channel quality, thereby enabling the second node to determine that it can dynamically adjust the modulation and coding mode based on the channel quality in order to change the transmission rate.

[0350] For specific implementations, please refer to the detailed description in the embodiment shown in Figure 3. Again, details are not described herein.

[0351] In another example, the information sending device 160 may be the second node in the embodiment shown in Figure 3. The processor 1602 in the device 160 is configured to read a computer program stored in the memory 1601 to perform the following operations: transmitting a first modulation and coding scheme (MCS) index to the first node through the communication interface 1604, where the first MCS index corresponds to the first modulation mode; and Receiving data from the first node by using the communication unit, or transmitting data to the first node based on the first modulation mode by using the communication unit.

[0352] The first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets.

[0353] The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and a first modulation mode or a modulation order corresponding to the first modulation mode. The first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode.

[0354] The information transmitting device 160 can determine an MCS index, transmit the MCS index to the first node, and confirm that data can be transmitted or received based on a first modulation mode corresponding to the first MCS index. In this way, the modulation scheme (specifically including modulation mode, spectral efficiency, code rate, etc.) can be dynamically adjusted based on different MCS indexes. For example, when the channel condition is poor, a modulation mode and spectral efficiency corresponding to a smaller MCS index in the 32 MCS information subsets can be selected to transmit or receive data. When the channel condition is good, a modulation mode corresponding to a larger MCS index in the 32 MCS information subsets can be selected to transmit or receive data. This improves the flexibility of modulation mode selection, maximizes the transmission capacity of the wireless channel, and improves the efficiency and reliability of data transmission.

[0355] In a possible implementation, the processor: receiving, via the communication interface 1604, a signal to interference plus noise ratio (SINR) indicator reported by the first node; and Determining a first MCS index based on the SINR indicator The device is further configured to:

[0356] Since the wireless communication channel varies randomly, the first node may report a SINR indicator, which may correspond to the channel quality, thereby enabling the second node to determine that it can dynamically adjust the modulation and coding mode based on the channel quality in order to change the transmission rate.

[0357] For specific implementations, please refer to the detailed description in the embodiment shown in Figure 3. Again, details are not described herein.

[0358] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program, which, when executed on one or more processors, implements the method in the embodiment shown in FIG.

[0359] An embodiment of the present application further provides a chip system, comprising at least one processor and a communication interface, the communication interface being configured to transmit and / or receive data, the at least one processor being configured to call a computer program stored in at least one memory to implement the method in the embodiment shown in FIG.

[0360] Furthermore, the at least one processor may include at least one of a CPU, an MPU, an MCU, or a co-processor.

[0361] An embodiment of the present application further provides a terminal. The terminal may be an intelligent cockpit product, a vehicle, etc. The terminal includes a first node and / or a second node. The first node (e.g., one or more of modules such as a camera, a screen, a microphone, a speaker, a radar, an electronic key, a keyless entry and start system controller, and a user equipment UE) is the first node in the embodiment shown in Figure 3. The second node (e.g., a base station, a cockpit domain controller CDC) is the second node in the embodiment shown in Figure 3.

[0362] Further, optionally, the terminal may be an unmanned aerial vehicle, a robot, a device in a smart home scenario, a device in a smart manufacturing scenario, etc.

[0363] An embodiment of the present application further provides a computer program product, which, when executed on one or more processors, may implement the communication method described in the embodiment shown in FIG.

[0364] All or some of the above embodiments may be implemented by software, hardware, firmware, or any combination thereof.

[0365] When software is used to implement the embodiments, all or some of the embodiments may be implemented in the form of a computer instruction product.

[0366] When the computer instructions are loaded and executed on a computer, the procedures or functions of the embodiments of the present application are implemented in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or another programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted by using a computer-readable storage medium. The computer-readable storage medium may be any available medium accessible by a computer, or may be a data storage device such as a server or a data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, or a magnetic tape), an optical medium (e.g., a DVD), a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0367] Sequence adjustment, combination, or deletion may be performed on the steps in the method embodiments of the present application based on actual requirements.

[0368] The combination, division and deletion may be performed on the modules in the apparatus embodiments of the present application based on actual requirements. [Other possible items] [Item 1] receiving a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and receiving data from the second node or transmitting data to the second node based on the first modulation mode; Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and 11. The information transmission method, wherein the first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio of the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode. [Item 2] Item 2. The method of claim 1, further comprising: reporting a signal to interference plus noise ratio (SINR) indicator to the second node, where the first MCS index corresponds to the SINR indicator. [Item 3] transmitting a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and receiving data from the first node or transmitting data to the first node based on the first modulation mode; Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and 11. The information transmission method, wherein the first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio of the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode. [Item 4] The method includes: receiving a signal to interference plus noise ratio (SINR) indicator reported by the first node; and determining the first MCS index based on the SINR indicator 4. The method of claim 3, further comprising: [Item 5] There are 9 MCS information subsets in the predefined MCS information set whose modulation mode is QPSK, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}; or 5. The method according to any one of items 1 to 4, wherein there are 10 MCS information subsets in which the modulation mode is QPSK in the predefined MCS information set, and the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}. [Item 6] There are four MCS information subsets in the predefined MCS information set whose modulation mode is 16QAM, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is 16QAM are {1.5273, 1.8008, 2.0781, 2.4023}, or the code rate sets corresponding to the MCS information subsets are {0.3818, 0.4502, 0.5195, 0.6006}; or 6. The method according to any one of items 1 to 5, wherein there are seven MCS information subsets in the predefined MCS information set, the modulation mode of which is 16QAM, and the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is 16QAM are {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets are {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}. [Item 7] There are 9 MCS information subsets in the predefined MCS information set with a modulation mode of 64QAM, and the spectral efficiency sets corresponding to the MCS information subsets with a modulation mode of 64QAM are {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate sets corresponding to the MCS information subsets are {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}; or 7. The method according to any one of items 1 to 6, wherein there are six MCS information subsets in which the modulation mode is 64QAM in the predefined MCS information set, and the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is 64QAM are {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate sets corresponding to the MCS information subsets are {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}. [Item 8] 8. The method according to any one of items 1 to 7, wherein there are five MCS information subsets in which the modulation mode is 256QAM in the predefined MCS information set, and / or the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is 256QAM are {5.2813, 5.7188, 6.1797, 6.6016, 7.0000} or {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate sets corresponding to the MCS information subsets are {0.6602, 0.7148, 0.7725, 0.8252, 0.8750} or {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}. [Item 9] There are five MCS information subsets in the predefined MCS information set whose modulation mode is 1024QAM, and the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 1024QAM is {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate set corresponding to the MCS information subsets is {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}; or 9. The method according to any one of items 1 to 8, wherein there are four MCS information subsets in the predefined MCS information set whose modulation mode is 1024QAM, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is 1024QAM are {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate sets corresponding to the MCS information subsets are {0.7500, 0.7930, 0.8359, 0.9229}. [Item 10] 10. The method according to any one of claims 1 to 9, wherein the predefined MCS information set includes at least one of quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), 64 QAM, 256 QAM, or 1024 QAM. [Item 11] 11. The method according to any one of claims 1 to 10, wherein in the predefined MCS information set, the modulation modes are 1024QAM, 256QAM, and 64QAM, and in the information subsets corresponding to one or more modulation modes, there are information subsets having a code rate higher than or equal to 0.875. [Item 12] 12. The method according to any one of items 1 to 11, wherein for the plurality of MCS information subsets, an interval between a first reference code rate difference and a difference between code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a first code rate threshold. [Item 13] a communication unit configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the second node by using the communication unit based on the first modulation mode, or to transmit data to the second node by using the communication unit. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and an information transmitting device, wherein the first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode. [Item 14] Item 14. The apparatus of item 13, wherein the communication unit is further configured to report a signal to interference plus noise ratio (SINR) indicator to the second node, and the first MCS index corresponds to the SINR indicator. [Item 15] a communication unit configured to transmit a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the first node by using the communication unit based on the first modulation mode, or to transmit data to the first node by using the communication unit. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and an information transmitting device, wherein the first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode. [Item 16] The communication unit is further configured to receive a signal to interference plus noise ratio (SINR) indicator reported by the first node; and Item 16. The apparatus of item 15, wherein the processing unit is further configured to determine the first MCS index based on the SINR indicator. [Item 17] There are 9 MCS information subsets in the predefined MCS information set whose modulation mode is QPSK, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}; or 17. The apparatus according to any one of claims 13 to 16, wherein there are 10 MCS information subsets in which the modulation mode is QPSK in the predefined MCS information set, and the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}. [Item 18] There are four MCS information subsets in the predefined MCS information set with a modulation mode of 16QAM, and / or the spectral efficiency set corresponding to the MCS information subsets with a modulation mode of 16QAM is {1.5273, 1.8008, 2.0781, 2.4023}, or the code rate set corresponding to the MCS information subsets is {0.3818, 0.4502, 0.5195, 0.6006}; or 18. The apparatus according to any one of claims 13 to 17, wherein there are seven MCS information subsets in which a modulation mode is 16QAM in the predefined MCS information set, and / or the spectral efficiency sets corresponding to the MCS information subsets in which a modulation mode is 16QAM are {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets are {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}. [Item 19] There are 9 MCS information subsets in the predefined MCS information set with a modulation mode of 64QAM, and / or the spectral efficiency set corresponding to the MCS information subsets with a modulation mode of 64QAM is {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate set corresponding to the MCS information subsets is {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}; or 19. The apparatus according to any one of claims 13 to 18, wherein there are six MCS information subsets in which a modulation mode is 64QAM in the predefined MCS information set, and / or the spectral efficiency sets corresponding to the MCS information subsets in which a modulation mode is 64QAM are {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate sets corresponding to the MCS information subsets are {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}. [Item 20] 20. The apparatus according to any one of claims 13 to 19, wherein there are five MCS information subsets in which a modulation mode is 256QAM in the predefined MCS information set, and / or the spectral efficiency sets corresponding to the MCS information subsets in which a modulation mode is 256QAM are {5.2813, 5.7188, 6.1797, 6.6016, 7.0000} or {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate sets corresponding to the MCS information subsets are {0.6602, 0.7148, 0.7725, 0.8252, 0.8750} or {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}. [Item 21] There are five MCS information subsets in the predefined MCS information set whose modulation mode is 1024QAM, and / or the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 1024QAM is {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate set corresponding to the MCS information subsets is {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}; or 21. The apparatus according to any one of claims 13 to 20, wherein there are four MCS information subsets in which a modulation mode is 1024QAM in the predefined MCS information set, and / or the spectral efficiency sets corresponding to the MCS information subsets in which a modulation mode is 1024QAM are {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate sets corresponding to the MCS information subsets are {0.7500, 0.7930, 0.8359, 0.9229}. [Item 22] 22. The apparatus according to any one of claims 13 to 21, wherein the predefined MCS information set includes at least one of quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), 64 QAM, 256 QAM, or 1024 QAM. [Item 23] 23. The apparatus according to any one of claims 13 to 22, wherein in the predefined MCS information set, there is an information subset in which the modulation mode is 1024QAM, 256QAM, or 64QAM, and the code rate is higher than or equal to 0.875. [Item 24] 24. The apparatus according to any one of claims 13 to 23, wherein for the plurality of MCS information subsets, an interval between a first reference code rate difference and a difference between code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a first code rate threshold. [Item 25] A chip system comprising at least one processor and a communication interface, the at least one processor being configured to call a computer program stored in at least one memory to enable an apparatus in which the chip system is located to implement a method according to any one of items 1, 2, and 5 to 12. [Item 26] A chip system, comprising at least one processor and a communication interface, the at least one processor configured to call a computer program stored in at least one memory to enable an apparatus in which the chip system is located to implement the method according to any one of items 3 to 12. [Item 27] A computer-readable storage medium, the computer-readable storage medium storing a computer program, the computer program being executed on one or more processors to execute the method according to any one of items 1, 2, and 5 to 12. [Item 28] A computer-readable storage medium, the computer-readable storage medium storing a computer program, the computer program being executed on one or more processors to execute the method according to any one of items 3 to 12. [Item 29] A first node, wherein the first node has an information transmission device according to any one of items 13, 14, and 17 to 24; and A second node, wherein the second node has an information transmission device according to any one of items 15 to 24. An information transmission system comprising: [Item 30] A terminal, the terminal comprising the information transmitting device according to any one of items 13 to 24, or the chip system according to item 25 or 26.

Claims

1. receiving a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and receiving data from the second node or transmitting data to the second node based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; The predefined MCS information set includes at least one of 1024 quadrature amplitude modulation (QAM), quadrature phase shift keying (QPSK), 16 QAM, 64 QAM, or 256 QAM; The information transmission method, wherein there are five MCS information subsets or six MCS information subsets in the predefined MCS information set, the modulation mode of which is the 1024QAM.

2. transmitting a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and receiving data from the first node or transmitting data to the first node based on the first modulation mode; Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; The predefined MCS information set includes at least one of 1024 quadrature amplitude modulation (QAM), quadrature phase shift keying (QPSK), 16 QAM, 64 QAM, or 256 QAM; The information transmission method, wherein there are five MCS information subsets or six MCS information subsets in the predefined MCS information set, the modulation mode of which is the 1024QAM.

3. The information transmission method described in claim 1 or 2, wherein when the six MCS information subsets exist, the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is the 1024QAM is {7.0313, 7.3730, 7.6953, 8.0957, 8.4570, 8.7500}, or the code rate set corresponding to the MCS information subsets is {0.7031, 0.7373, 0.7695, 0.8096, 0.8457, 0.8750}.

4. receiving a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and receiving data from the second node or transmitting data to the second node based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are 9 MCS information subsets in the predefined MCS information set whose modulation mode is QPSK, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}; or 1. The information transmission method according to claim 1, wherein there are 10 MCS information subsets in the predefined MCS information set, the modulation mode of which is QPSK, and a set of spectral efficiencies corresponding to the MCS information subsets in which the modulation mode is QPSK is {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or a set of code rates corresponding to the MCS information subsets is {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}.

5. transmitting a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and receiving data from the first node or transmitting data to the first node based on the first modulation mode; Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are 9 MCS information subsets in the predefined MCS information set whose modulation mode is QPSK, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}; or 1. The information transmission method according to claim 1, wherein there are 10 MCS information subsets in the predefined MCS information set, the modulation mode of which is QPSK, and a set of spectral efficiencies corresponding to the MCS information subsets in which the modulation mode is QPSK is {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or a set of code rates corresponding to the MCS information subsets is {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}.

6. receiving a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and receiving data from the second node or transmitting data to the second node based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are four MCS information subsets in the predefined MCS information set whose modulation mode is 16QAM, and the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 16QAM is {1.5273, 1.8008, 2.0781, 2.4023}, or the code rate set corresponding to the MCS information subsets is {0.3818, 0.4502, 0.5195, 0.6006}; or wherein there are seven MCS information subsets in the predefined MCS information set, the modulation mode of which is 16QAM, and the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is 16QAM are {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets are {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}.

7. transmitting a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and receiving data from the first node or transmitting data to the first node based on the first modulation mode; Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are four MCS information subsets in the predefined MCS information set whose modulation mode is 16QAM, and the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 16QAM is {1.5273, 1.8008, 2.0781, 2.4023}, or the code rate set corresponding to the MCS information subsets is {0.3818, 0.4502, 0.5195, 0.6006}; or wherein there are seven MCS information subsets in the predefined MCS information set, the modulation mode of which is 16QAM, and the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is 16QAM are {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets are {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}.

8. receiving a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and receiving data from the second node or transmitting data to the second node based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are 9 MCS information subsets in the predefined MCS information set whose modulation mode is 64QAM, and the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 64QAM is {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate set corresponding to the MCS information subsets is {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}; or In the predefined MCS information set, there are six MCS information subsets whose modulation mode is 64QAM, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is 64QAM are {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate sets corresponding to the MCS information subsets are {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}.

9. transmitting a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and receiving data from the first node or transmitting data to the first node based on the first modulation mode; Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are 9 MCS information subsets in the predefined MCS information set whose modulation mode is 64QAM, and the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 64QAM is {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate set corresponding to the MCS information subsets is {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}; or In the predefined MCS information set, there are six MCS information subsets whose modulation mode is 64QAM, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is 64QAM are {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate sets corresponding to the MCS information subsets are {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}.

10. receiving a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and receiving data from the second node or transmitting data to the second node based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; wherein there are five MCS information subsets in the predefined MCS information set, the modulation mode of which is 256QAM, and the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 256QAM is {5.2813, 5.7188, 6.1797, 6.6016, 7.0000} or {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate set corresponding to the MCS information subsets is {0.6602, 0.7148, 0.7725, 0.8252, 0.8750} or {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}.

11. transmitting a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and receiving data from the first node or transmitting data to the first node based on the first modulation mode; Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; wherein there are five MCS information subsets in the predefined MCS information set, the modulation mode of which is 256QAM, and the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 256QAM is {5.2813, 5.7188, 6.1797, 6.6016, 7.0000} or {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate set corresponding to the MCS information subsets is {0.6602, 0.7148, 0.7725, 0.8252, 0.8750} or {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}.

12. receiving a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and receiving data from the second node or transmitting data to the second node based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are five MCS information subsets in the predefined MCS information set whose modulation mode is 1024QAM, and the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 1024QAM is {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate set corresponding to the MCS information subsets is {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}; or In the predefined MCS information set, there are four MCS information subsets whose modulation mode is 1024QAM, and a set of spectral efficiencies corresponding to the MCS information subsets whose modulation mode is 1024QAM is {7.5000, 7.9297, 8.3594, 9.2285}, or a set of code rates corresponding to the MCS information subsets is {0.7500, 0.7930, 0.8359, 0.9229}.

13. transmitting a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and receiving data from the first node or transmitting data to the first node based on the first modulation mode; Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are five MCS information subsets in the predefined MCS information set whose modulation mode is 1024QAM, and the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 1024QAM is {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate set corresponding to the MCS information subsets is {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}; or In the predefined MCS information set, there are four MCS information subsets whose modulation mode is 1024QAM, and a set of spectral efficiencies corresponding to the MCS information subsets whose modulation mode is 1024QAM is {7.5000, 7.9297, 8.3594, 9.2285}, or a set of code rates corresponding to the MCS information subsets is {0.7500, 0.7930, 0.8359, 0.9229}.

14. receiving a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and receiving data from the second node or transmitting data to the second node based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; In the predefined MCS information set, in which the modulation modes are 1024QAM, 256QAM, and 64QAM, there are information subsets in the information subsets corresponding to one or more modulation modes, in which a code rate is greater than or equal to 0.

875.

15. transmitting a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and receiving data from the first node or transmitting data to the first node based on the first modulation mode; Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; In the predefined MCS information set, in which the modulation modes are 1024QAM, 256QAM, and 64QAM, there are information subsets in the information subsets corresponding to one or more modulation modes, in which a code rate is greater than or equal to 0.

875.

16. receiving a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and receiving data from the second node or transmitting data to the second node based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; 11. The information transmission method of claim 10, wherein for a plurality of the MCS information subsets, an interval between a first reference code rate difference and a difference between code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a first code rate threshold.

17. transmitting a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and receiving data from the first node or transmitting data to the first node based on the first modulation mode; Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; 11. The information transmission method of claim 10, wherein for a plurality of the MCS information subsets, an interval between a first reference code rate difference and a difference between code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a first code rate threshold.

18. The information transmission method according to any one of claims 1, 4, 6, 8, 10, 12, 14 and 16, further comprising the step of: reporting a signal-to-interference plus noise ratio (SINR) indicator to the second node.

19. 18. The information transmission method of claim 2, 5, 7, 9, 11, 13, 15 and 17, further comprising: receiving a signal-to-interference plus noise ratio (SINR) indicator reported by the first node.

20. a communication unit configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the second node by using the communication unit based on the first modulation mode, or to transmit data to the second node by using the communication unit. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; The predefined MCS information set includes at least one of 1024 quadrature amplitude modulation (QAM), quadrature phase shift keying (QPSK), 16 QAM, 64 QAM, or 256 QAM; An information transmitting device, wherein there are five MCS information subsets or six MCS information subsets in which the modulation mode is the 1024QAM in the predefined MCS information set.

21. a communication unit configured to transmit a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the first node by using the communication unit or to transmit data to the first node by using the communication unit based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; The predefined MCS information set includes at least one of 1024 quadrature amplitude modulation (QAM), quadrature phase shift keying (QPSK), 16 QAM, 64 QAM, or 256 QAM; An information transmitting device, wherein there are five MCS information subsets or six MCS information subsets in which the modulation mode is the 1024QAM in the predefined MCS information set.

22. An information transmission device as described in claim 20 or 21, wherein when the six MCS information subsets exist, the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is the 1024QAM is {7.0313, 7.3730, 7.6953, 8.0957, 8.4570, 8.7500}, or the code rate set corresponding to the MCS information subsets is {0.7031, 0.7373, 0.7695, 0.8096, 0.8457, 0.8750}.

23. a communication unit configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the second node by using the communication unit based on the first modulation mode, or to transmit data to the second node by using the communication unit. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are 9 MCS information subsets in the predefined MCS information set whose modulation mode is QPSK, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}; or An information transmitting device, wherein there are 10 MCS information subsets in which the modulation mode is QPSK in the predefined MCS information set, and the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}.

24. a communication unit configured to transmit a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the first node by using the communication unit or to transmit data to the first node by using the communication unit based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are 9 MCS information subsets in the predefined MCS information set whose modulation mode is QPSK, and the spectral efficiency sets corresponding to the MCS information subsets whose modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129}; or An information transmitting device, wherein there are 10 MCS information subsets in which the modulation mode is QPSK in the predefined MCS information set, and the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is QPSK are {0.2891, 0.3691, 0.4668, 0.5801, 0.7207, 0.8828, 1.0586, 1.2441, 1.4258, 1.6016}, or the code rate sets corresponding to the MCS information subsets are {0.1445, 0.1846, 0.2334, 0.2900, 0.3604, 0.4414, 0.5293, 0.6221, 0.7129, 0.8008}.

25. a communication unit configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the second node by using the communication unit based on the first modulation mode, or to transmit data to the second node by using the communication unit. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are four MCS information subsets in the predefined MCS information set whose modulation mode is 16QAM, and / or the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 16QAM is {1.5273, 1.8008, 2.0781, 2.4023}, or the code rate set corresponding to the MCS information subsets is {0.3818, 0.4502, 0.5195, 0.6006}; or An information transmitting device, wherein there are seven MCS information subsets in which the modulation mode is 16QAM in the predefined MCS information set, and / or the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is 16QAM are {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets are {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}.

26. a communication unit configured to transmit a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the first node by using the communication unit or to transmit data to the first node by using the communication unit based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are four MCS information subsets in the predefined MCS information set whose modulation mode is 16QAM, and / or the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 16QAM is {1.5273, 1.8008, 2.0781, 2.4023}, or the code rate set corresponding to the MCS information subsets is {0.3818, 0.4502, 0.5195, 0.6006}; or An information transmitting device, wherein there are seven MCS information subsets in which the modulation mode is 16QAM in the predefined MCS information set, and / or the spectral efficiency sets corresponding to the MCS information subsets in which the modulation mode is 16QAM are {1.8008, 2.0781, 2.4023, 2.7344, 3.0430, 3.3320, 3.5430}, or the code rate sets corresponding to the MCS information subsets are {0.4502, 0.5195, 0.6006, 0.6836, 0.7607, 0.8330, 0.8857}.

27. a communication unit configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the second node by using the communication unit based on the first modulation mode, or to transmit data to the second node by using the communication unit. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are 9 MCS information subsets in the predefined MCS information set whose modulation mode is 64QAM, and / or the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 64QAM is {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate set corresponding to the MCS information subsets is {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}; or An information transmitting device, wherein there are six MCS information subsets in which the modulation mode is 64QAM in the predefined MCS information set, and / or the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 64QAM is {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate set corresponding to the MCS information subsets is {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}.

28. a communication unit configured to transmit a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the first node by using the communication unit or to transmit data to the first node by using the communication unit based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are 9 MCS information subsets in the predefined MCS information set whose modulation mode is 64QAM, and / or the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 64QAM is {2.4199, 2.7480, 3.1055, 3.4746, 3.8379, 4.2129, 4.5879, 4.9102, 5.2500}, or the code rate set corresponding to the MCS information subsets is {0.4033, 0.4580, 0.5176, 0.5791, 0.6396, 0.7021, 0.7646, 0.8184, 0.8750}; or An information transmitting device, wherein there are six MCS information subsets in which the modulation mode is 64QAM in the predefined MCS information set, and / or the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 64QAM is {3.8379, 4.2129, 4.5879, 4.9102, 5.2500, 5.5020}, or the code rate set corresponding to the MCS information subsets is {0.6396, 0.7021, 0.7646, 0.8184, 0.8750, 0.9170}.

29. a communication unit configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the second node by using the communication unit based on the first modulation mode, or to transmit data to the second node by using the communication unit. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; An information transmitting device, wherein there are five MCS information subsets in which the modulation mode is 256QAM in the predefined MCS information set, and / or the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 256QAM is {5.2813, 5.7188, 6.1797, 6.6016, 7.0000} or {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate set corresponding to the MCS information subsets is {0.6602, 0.7148, 0.7725, 0.8252, 0.8750} or {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}.

30. a communication unit configured to transmit a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the first node by using the communication unit or to transmit data to the first node by using the communication unit based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; An information transmitting device, wherein there are five MCS information subsets in which the modulation mode is 256QAM in the predefined MCS information set, and / or the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 256QAM is {5.2813, 5.7188, 6.1797, 6.6016, 7.0000} or {5.7188, 6.1797, 6.6016, 7.0000, 7.3203}, or the code rate set corresponding to the MCS information subsets is {0.6602, 0.7148, 0.7725, 0.8252, 0.8750} or {0.7148, 0.7725, 0.8252, 0.8750, 0.9150}.

31. a communication unit configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the second node by using the communication unit based on the first modulation mode, or to transmit data to the second node by using the communication unit. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are five MCS information subsets in the predefined MCS information set whose modulation mode is 1024QAM, and / or the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 1024QAM is {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate set corresponding to the MCS information subsets is {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}; or An information transmitting device, wherein there are four MCS information subsets in which the modulation mode is 1024QAM in the predefined MCS information set, and / or the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 1024QAM is {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate set corresponding to the MCS information subsets is {0.7500, 0.7930, 0.8359, 0.9229}.

32. a communication unit configured to transmit a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the first node by using the communication unit or to transmit data to the first node by using the communication unit based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; There are five MCS information subsets in the predefined MCS information set whose modulation mode is 1024QAM, and / or the spectral efficiency set corresponding to the MCS information subsets whose modulation mode is 1024QAM is {7.0996, 7.5000, 7.9297, 8.3594, 8.7500}, or the code rate set corresponding to the MCS information subsets is {0.7100, 0.7500, 0.7930, 0.8359, 0.8750}; or An information transmitting device, wherein there are four MCS information subsets in which the modulation mode is 1024QAM in the predefined MCS information set, and / or the spectral efficiency set corresponding to the MCS information subsets in which the modulation mode is 1024QAM is {7.5000, 7.9297, 8.3594, 9.2285}, or the code rate set corresponding to the MCS information subsets is {0.7500, 0.7930, 0.8359, 0.9229}.

33. a communication unit configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the second node by using the communication unit based on the first modulation mode, or to transmit data to the second node by using the communication unit. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; An information transmitting device, wherein in the predefined MCS information set, there exists an information subset in which the modulation mode is 1024QAM, 256QAM, or 64QAM, and the code rate is higher than or equal to 0.

875.

34. a communication unit configured to transmit a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the first node by using the communication unit or to transmit data to the first node by using the communication unit based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; An information transmitting device, wherein in the predefined MCS information set, there exists an information subset in which the modulation mode is 1024QAM, 256QAM, or 64QAM, and the code rate is higher than or equal to 0.

875.

35. a communication unit configured to receive a first modulation and coding scheme (MCS) index from a second node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the second node by using the communication unit based on the first modulation mode, or to transmit data to the second node by using the communication unit. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; For a plurality of the MCS information subsets, an interval between a first reference code rate difference and a difference between code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a first code rate threshold.

36. a communication unit configured to transmit a first modulation and coding scheme (MCS) index to a first node, where the first MCS index corresponds to a first modulation mode; and a processing unit configured to receive data from the first node by using the communication unit or to transmit data to the first node by using the communication unit based on the first modulation mode. Equipped with Wherein, the first MCS information subset in which the first MCS index is located belongs to a predefined MCS information set, and the predefined MCS information set includes 32 MCS information subsets; and The first MCS information subset includes a first spectral efficiency and / or a first code rate corresponding to the first MCS index, and the first modulation mode or a modulation order corresponding to the first modulation mode, and the first code rate is a ratio between the spectral efficiency corresponding to the first MCS index and the modulation order corresponding to the first modulation mode; For a plurality of the MCS information subsets, an interval between a first reference code rate difference and a difference between code rates corresponding to any two adjacent indexes whose corresponding modulation modes are the same is lower than or equal to a first code rate threshold.

37. 36. The information transmission device according to any one of claims 20, 23, 25, 27, 29, 31, 33 and 35, wherein the communication unit is further configured to report a signal to interference plus noise ratio (SINR) indicator to the second node.

38. 37. The information transmission device according to any one of claims 21, 24, 26, 28, 30, 32, 34 and 36, wherein the communication unit is further configured to receive a signal to interference plus noise ratio (SINR) indicator reported by the first node.

39. A chip system comprising at least one processor and a communication interface, the at least one processor configured to call a computer program stored in at least one memory to enable an apparatus in which the chip system is located to implement an information transmission method described in any one of claims 1, 4, 6, 8, 10, 12, 14 and 16.

40. A chip system comprising at least one processor and a communication interface, the at least one processor configured to call a computer program stored in at least one memory to enable an apparatus in which the chip system is located to implement an information transmission method described in any one of claims 2, 5, 7, 9, 11, 13, 15 and 17.

41. A computer-readable storage medium, the computer-readable storage medium storing a computer program, the computer program being executed on one or more processors to perform the information transmission method according to any one of claims 1, 4, 6, 8, 10, 12, 14 and 16.

42. A computer-readable storage medium, the computer-readable storage medium storing a computer program, the computer program being executed on one or more processors to perform the information transmission method according to any one of claims 2, 5, 7, 9, 11, 13, 15 and 17.

43. a first node, wherein the first node comprises an information transmission device according to any one of claims 20, 23, 25, 27, 29, 31, 33 and 35; and A second node, wherein the second node comprises an information transmission device according to any one of claims 21, 24, 26, 28, 30, 32, 34 and 36. An information transmission system comprising:

44. A terminal, comprising an information transmission device according to any one of claims 20 to 38, or a chip system according to claim 39 or 40.

45. A program for causing a computer to carry out the steps of any one of claims 1 to 19.

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