Wireless communication method, electronic equipment and storage medium

Abstract

Provided in an embodiment of the present application are a wireless communication method, an electronic device and a storage medium, the method comprising: receiving a hybrid automatic repeat request (HARQ) negative acknowledgement for a transport block sent by using a first waveform; on the basis of HARQ state information related to the transmission block, it is determined that the first waveform is switched to a second waveform for HARQ retransmission of the transmission block, and the peak-to-average power ratio of the second waveform is lower than the peak-to-average power ratio of the first waveform; and according to the second waveform and the scheduling authorization from the second node, sending the HARQ retransmission of the transmission block. According to the embodiment of the invention, the transmission waveform can be adjusted after the data transmission fails, the retransmission success rate is improved by changing the peak-to-average ratio of the wave beam, and the data transmission time delay is reduced.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and more particularly to a wireless communication method, electronic device, and storage medium. Background Technology

[0002] Hybrid Automatic Repeat reQuest (HARQ) technology is one of the core technologies of modern wireless communication systems, used to improve the reliability of data transmission. Its core principle is that when decoding fails, the receiver requests retransmission of data and merges the retransmitted data with the initial transmission data for decoding, thereby achieving time diversity gain.

[0003] Currently, retransmissions always use the same waveform and modulation and coding scheme (MCS) as the initial transmission. For example, if the initial transmission uses Orthogonal Frequency Division Multiplexing (OFDM) waveform with Quadrature Amplitude Modulation (QAM), all retransmissions will continue to use OFDM+16QAM. However, this approach cannot adapt to changing link conditions during retransmissions, leading to a loss of system performance, particularly reliability and energy efficiency. For instance, the failure of the initial transmission indicates a tight link budget, suggesting that current channel conditions, interference levels, or UE power status cannot support the selected transmission configuration. Under conditions of already tight link budgets, if retransmissions continue to use Peak-to-Average Power Ratio (PAPR) waveforms (such as OFDM), it forces the User Equipment (UE) power amplifier (PA) to operate in a high-linearity, low-efficiency region, resulting in a significant waste of transmit power as heat instead of converting it into effective radio frequency energy. Summary of the Invention

[0004] This application provides a wireless communication method, electronic device, and storage medium that can adjust the waveform of the data transmission beam after a transmission failure, thereby improving the retransmission success rate and reducing data transmission latency.

[0005] This application provides a wireless communication method applied to a first node, wherein the method includes: Receive a negative HARQ acknowledgment for a transport block transmitted using the first waveform; Based on the HARQ state information associated with the transport block, it is determined to switch from the first waveform to the second waveform for HARQ retransmission of the transport block, wherein the peak-to-average power ratio of the second waveform is lower than that of the first waveform. Based on the second waveform and the scheduling authorization from the second node, the HARQ retransmission of the transport block is sent.

[0006] This application also provides a wireless communication method applied to a second node, wherein the method includes: Send a HARQ denial confirmation to the first node for the transport block transmitted using the first waveform; Obtain the channel state information report sent by the first node, and associate the current channel state information report with the second waveform; Based on the channel state information report, HARQ retransmission scheduling resources are allocated for the transport block and the modulation and coding scheme (MCS) is determined. Send downlink control information to the first node to schedule the first node to use the second waveline for the HARQ retransmission; Wherein, the peak-to-average power ratio of the second waveform is lower than that of the first waveform, and the first node determines the switch from the first waveform to the second waveform based on the HARQ status information associated with the transport block.

[0007] This application also provides an electronic device, wherein the electronic device includes: One or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method as described in any of the embodiments of this application.

[0008] This application also provides a computer-readable storage medium storing one or more programs that are executed by one or more processors to implement the method as described in any of the embodiments of this application.

[0009] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a flowchart of a wireless communication method provided in an embodiment of this application; Figure 2 This is an example diagram of a wireless communication method provided in an embodiment of this application; Figure 3 This is a flowchart of another wireless communication method provided in an embodiment of this application; Figure 4 This is an example diagram of another wireless communication method provided in the embodiments of this application; Figure 5 This is a flowchart of another wireless communication method provided in an embodiment of this application; Figure 6 This is an example diagram of another wireless communication method provided in the embodiments of this application; Figure 7 This is a flowchart of another wireless communication method provided in an embodiment of this application; Figure 8 This is an example diagram of a wireless communication method provided in an embodiment of this application; Figure 9 This is a flowchart of another wireless communication method provided in an embodiment of this application; Figure 10 This is an example diagram of a waveform adjustment process provided in an embodiment of this application; Figure 11 This is a schematic diagram of the structure of a wireless communication device provided in an embodiment of this application; Figure 12 This is a schematic diagram of another wireless communication device provided in an embodiment of this application; Figure 13 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0012] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application.

[0013] In the following description, the use of suffixes such as “module,” “part,” or “unit” to denote elements is solely for the purpose of illustration in this application and has no particular meaning in itself. Therefore, “module,” “part,” or “unit” may be used interchangeably.

[0014] Figure 1 This is a flowchart illustrating a wireless communication method provided in an embodiment of this application. This embodiment is applicable to situations where the waveform of the transmitted beam is adjusted during HARQ retransmission. The method can be executed by a wireless communication device, which can be implemented through software and / or hardware methods. It is generally integrated into a first node, which may include user equipment, a mobile terminal, etc. (See also...) Figure 1 The method provided in this application specifically includes the following steps: Step 110: Receive a negative HARQ acknowledgment for the transport block transmitted using the first waveform.

[0015] Among them, the hybrid automatic repeat request negative acknowledgment can indicate that the transmission block sent using the first waveform failed to be transmitted.

[0016] In this embodiment of the application, if the first node receives a Hybrid Automatic Repeat Request (HARQ) negative acknowledgment for a transport block that is transmitted based on a first waveform, then it is determined that the transport block transmitted based on the first waveform has failed to transmit.

[0017] Step 120: Based on the HARQ status information associated with the transport block, determine to switch from the first waveform to the second waveform for HARQ retransmission of the transport block, wherein the peak-to-average power ratio of the second waveform is lower than that of the first waveform.

[0018] Specifically, HARQ status information related to the transmission block transmitted with the first waveform can be obtained. The second waveform used to transmit the transmission block can be determined according to the HARQ status information. The peak-to-average power ratio of the second waveform is less than that of the first waveform, thereby improving the power efficiency of the transmitter and increasing the retransmission success rate of the transmission block.

[0019] Step 130: Based on the second waveform and the scheduling authorization from the second node, send a hybrid automatic repeat request for the transport block.

[0020] Among them, scheduling authorization can schedule transmission permissions such as time and frequency resources and modulation and coding schemes.

[0021] Specifically, it can obtain scheduling authorization from the second node, determine the time-frequency resources and modulation and coding scheme for transmission according to the scheduling authorization, and perform mixed automatic retransmission request retransmission on the transmission block identified in the initial transmission according to the second waveform and the determined time-frequency resources and modulation and coding scheme.

[0022] In this embodiment, upon receiving a negative acknowledgment of a Hybrid Automatic Repeat Request (HARQ) sent with a first waveform, a second waveform is determined based on the HARQ status information related to the transport block. This second waveform has a smaller peak-to-average power ratio (PAPR) than the first waveform, and the transport block is retransmitted according to the second waveform. This embodiment of the invention can select a waveform with a smaller PAPR for transport block retransmission based on the HARQ status information, thereby improving signal strength or coverage under the same power configuration, increasing the success rate of transport block retransmission, and contributing to improved system stability.

[0023] Based on the above-described embodiments, the HARQ status information includes at least one of the following: The number of retransmissions that have been performed on the current transport block; The estimated amount of channel state change since the initial transmission of the transport block; The quality of service requirements or service type identifier of the service to which the transport block belongs.

[0024] Specifically, the HARQ status information obtained related to the transport block includes at least the number of retransmissions that the transport block has performed so far, the estimated amount of channel state changes since the initial transmission of the transport block, and the quality of service requirements or service type identifier of the service to which the transport block belongs.

[0025] Based on the above-described embodiments, the method further includes: generating a channel state information report corresponding to the second waveform; and sending the channel state information report to the second node.

[0026] In this embodiment of the application, a corresponding channel state information report can be generated based on the second waveform and sent to the second node. The channel state information report can be used to determine the scheduling authorization used for transport block transmission. The scheduling authorization may include modulation and coding scheme and time and frequency resources, thereby configuring a suitable modulation and coding scheme and time and frequency resources for the second waveform, maximizing retransmission efficiency and avoiding failure due to mismatch.

[0027] In some embodiments of the application, HARQ retransmission uses the same modulation and coding scheme (MCS) as the initial transmission of the transport block, or uses an MCS with a modulation order lower than that of the initial transmission.

[0028] Specifically, the modulation and coding scheme used for HARQ retransmission of a transport block is the same as the modulation and coding scheme used for the initial transmission of the transport block, or the modulation order of the modulation and coding scheme used is lower than the modulation order of the MCS used in the initial transmission.

[0029] Based on the above-described embodiments, the first waveform and the second waveform are independently selected from the following waveform set, and the peak-to-average power ratio of the second waveform is lower than that of the first waveform: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform; Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveforms based on Discrete Fourier Transform extension; DFT-s-OFDM waveforms obtained by applying frequency domain spectrum shaping (FDSS); The phase transition of the modulation symbol is constrained within the range of π / 2 in the DFT-s-OFDM waveform; CP-OFDM waveform based on pitch-reserved TR.

[0030] In the embodiments of this application, the first waveform and the second waveform can be at least one of the following: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform, Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform based on Discrete Fourier Transform Extension (DFT-s-OFDM), DFT-s-OFDM waveform with Frequency Domain Spectrum Shaping (FDSS), DFT-s-OFDM waveform where the phase transition of the modulation symbol is constrained to the range of π / 2, and CP-OFDM waveform based on Tone Reservation TR. Furthermore, the first waveform and the second waveform can be selected independently in various ways, and the peak-to-average power ratio of the second waveform is lower than that of the first waveform.

[0031] In this embodiment of the application, the second waveform corresponds to the first waveform and the hybrid automatic repeat request status information.

[0032] Specifically, the second waveform to be switched can be determined based on the first waveform and the hybrid automatic repeat request status information. That is, the second waveform can be associated with the first waveform and the hybrid automatic repeat request status information.

[0033] Based on the above embodiments of the invention, determining the switch from the first waveform to the second waveform for HARQ retransmission of the transport block based on HARQ state information related to the transport block includes: In response to determining that the number of retransmissions has reached or exceeded a first predetermined threshold, a switch from the first waveform to the second waveform is performed.

[0034] In this embodiment of the application, if the HARQ status information includes the number of retransmissions that the transport block has performed so far, and the number of retransmissions reaches or exceeds a first predetermined threshold, then a switch from the first waveform to the second waveform is performed, that is, the second waveform is used to replace the first waveform to perform HARQ retransmission on the transport block.

[0035] In one exemplary implementation, see Figure 2The User Equipment (UE) first uses a first waveform for initial transmission, which may include Orthogonal Frequency Division Multiplexing (OFDM) with high spectral efficiency. If a NACK is received, the UE initiates a HARQ retransmission procedure. At this time, the UE may make a decision based on HARQ status information, which may include the current number of retransmissions. When the number of retransmissions reaches or exceeds a preset threshold, such as two times, it indicates that the channel conditions may be poor, and the initial waveform is no longer used. In response to the above conditions, the UE can switch from OFDM as the first waveform to a second waveform, which may be a DFT-s-OFDM waveform with a lower peak-to-average power ratio (PAPR). Using a low PAPR waveform for retransmission can improve the power efficiency of the transmitter, providing stronger signal strength or better coverage under the same power configuration, thereby significantly improving the retransmission success rate. For example, in this embodiment of the invention, the initial transmission of an eMBB service using an OFDM waveform by the UE fails, and a third retransmission is about to be performed.

[0036] Figure 3 This is a flowchart of another wireless communication method provided in an embodiment of this application. The embodiment of this application describes the waveform switching process; see [link to relevant documentation]. Figure 3 The method provided in this application specifically includes the following steps: Step 210: Receive a HARQ negative acknowledgment for the transport block transmitted using the first waveform.

[0037] Step 220: In response to determining that the channel state change exceeds a second predetermined threshold, determine to perform a switch from the first waveform to the second waveform.

[0038] Specifically, the estimated change in channel state information since the initial transmission of the transport block is carried in the acquired HARQ state information. If the change in channel state information is greater than a second predetermined threshold, the first waveform is switched to the second waveform.

[0039] Step 230: Based on the second waveform and the scheduling authorization from the second node, send the HARQ retransmission of the transport block.

[0040] In this embodiment, when receiving a negative acknowledgment of a Hybrid Automatic Repeat Request (HARQ) for a transport block transmitted using a first waveform, it is determined that the estimated channel state change of the transport block since its initial transmission is greater than a second predetermined threshold in the HARQ status information. The first waveform is then switched to a second waveform, and the transport block is retransmitted using the HARQ request according to the second waveform and scheduling authorization. This embodiment of the invention can select a waveform with a smaller peak-to-average power ratio (PAPR) for transport block retransmission based on the HARQ request status information, which can improve signal strength or coverage under the same power configuration, increase the success rate of transport block retransmission, and help improve system stability.

[0041] In one exemplary implementation, Figure 4 This is an example diagram of another wireless communication method provided in the embodiments of this application. See also... Figure 4 The UE initiates the initial transmission of a transport block using the first waveform. Upon receiving a NACK feedback, it confirms that the initial transmission has failed. After the initial transmission fails, the UE not only checks the number of retransmissions but also compares the current channel state (such as RSRP and SINR) with the difference during the initial transmission. If the channel quality change exceeds a certain threshold, i.e., channel degradation is greater than or equal to the threshold, waveform switching is immediately triggered. A key step after the switch is that the UE needs to remeasure the channel based on the new second waveform and generate a CSI report to report to the network. The network allocates resources and MCS based on the new CSI report, thereby using the second waveform and network authorization for HARQ retransmission. This application leverages the different interference resistance and coverage capabilities of different waveforms. The network can allocate appropriate MCS and resources based on the CSI of the new waveform, thereby maximizing retransmission efficiency and avoiding further failures due to mismatch.

[0042] Figure 5 This is a flowchart of another wireless communication method provided in an embodiment of this application. The embodiment of this application describes the waveform switching process; see [link to relevant documentation]. Figure 5 The method provided in this application specifically includes the following steps: Step 310: Receive a negative acknowledgment of a Hybrid Automatic Repeat Request (HARQ) for a transport block transmitted using the first waveform.

[0043] Step 320: In response to determining that the service type identifier indicates Ultra Reliable Low Latency Communication (URLLC) service and the number of retransmissions is greater than zero, determine to perform a switch from the first waveform to the second waveform.

[0044] In this embodiment of the invention, when a Hybrid Automatic Repeat Request (HARQ) negative acknowledgment is received for a transport block sent with a first waveform, if the HARQ status information carries the service quality requirements, service type, and retransmission count of the service to which the transport block belongs, and the service type is Ultra-Reliable and Low-Latency Communications (URLLC), and the retransmission count is greater than zero, then the first waveform of the transport block is switched to the second waveform.

[0045] Step 330: Based on the second waveform and the scheduling authorization from the second node, send the HARQ retransmission of the transport block.

[0046] In one exemplary implementation, Figure 6 This is an example diagram of another wireless communication method provided in the embodiments of this application. Specifically, the QoS requirements of URLLC services are extremely low latency and extremely high success rate. Therefore, once the initial transmission fails, the UE will not wait for the number of retransmissions to accumulate or for the channel to deteriorate significantly, but will respond immediately. Based on the service quality (QoS) requirements in the HARQ status information, the UE identifies this as a URLLC service, and thus, during the first retransmission, it decisively switches from the first waveform (such as OFDM) that may be used for enhanced mobile broadband (eMBB) to the second waveform (such as π / 2 BPSK based on interpolation) with the lowest PAPR and the strongest coverage, even at the cost of sacrificing some spectral efficiency, to ensure a successful retransmission on the first attempt and meet the stringent latency and reliability requirements of URLLC.

[0047] Based on the above-mentioned application embodiments, HARQ retransmission adopts the same modulation and coding scheme (MCS) as the initial transmission of the transport block, or adopts a modulation order lower than that of the MCS of the initial transmission.

[0048] Based on the above-described embodiments, the first waveform and the second waveform are independently selected from the following waveform set, and the peak-to-average power ratio of the second waveform is lower than that of the first waveform: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform; Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveforms based on Discrete Fourier Transform extension; DFT-s-OFDM waveforms obtained by applying frequency domain spectrum shaping (FDSS); The phase transition of the modulation symbol is constrained within the range of π / 2 in the DFT-s-OFDM waveform; CP-OFDM waveform based on pitch-reserved TR.

[0049] Based on the above-described embodiments, the waveforms in the waveform set are categorized into the following levels according to their peak-to-average power ratio, from highest to lowest: Level 1: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveforms, including its CP-OFDM waveforms based on tone reservation TR; Second level: Orthogonal frequency division multiplexing (DFT-s-OFDM) waveforms based on the extended Discrete Fourier Transform (DFT). Third level: Applying frequency domain spectrum shaping (FDSS) to DFT-s-OFDM waveforms; Level 4: DFT-s-OFDM waveforms where the phase transition of the modulation symbol is constrained within the range of π / 2; The second waveform belongs to a lower level than the first waveform.

[0050] Based on the above-described embodiments, the combination of the first waveform and the second waveform is one of the following: The first waveform is the first-level waveform, and the second waveform is the second, third, or fourth-level waveform; The first waveform is a second-level waveform, and the second waveform is a third or fourth-level waveform; The first waveform is a third-level waveform, and the second waveform is a fourth-level waveform.

[0051] In this embodiment, the high PAPR of CP-OFDM originates from the superposition of multiple independently modulated subcarriers in the time domain, which may generate huge instantaneous power peaks. Theoretical analysis and simulation show that its PAPR is related to the number of subcarriers, with typical values ​​reaching the order of 10-12 dB. TR technology can reduce PAPR to some extent by reserving some subcarriers for signal cancellation to reduce peaks.

[0052] DFT-s-OFDM performs DFT pre-spreading on the data symbols before modulation, transforming the time-domain symbols to the frequency domain before mapping them onto the subcarriers. Essentially, this converts multi-carrier transmission into transmission with single-carrier characteristics, thus avoiding the probability of extreme peak values ​​generated by phase alignment in multi-carrier signals. Its PAPR characteristic mainly depends on the modulation scheme of the input data (such as QPSK, 16QAM), with a typical PAPR range of 5-7 dB, significantly lower than CP-OFDM.

[0053] FDSS, based on DFT-s-OFDM, applies a specific window function or filtering operation to the signal in the frequency domain. This operation further smooths the signal's time-domain envelope and reduces amplitude fluctuations. A well-designed FDSS can further reduce the PAPR of DFT-s-OFDM by approximately 1-2 dB without sacrificing bit error rate performance.

[0054] The DFT-s-OFDM waveform, where the phase transitions of modulation symbols are constrained within the π / 2 range, employs a special π / 2 modulation within the DFT-s-OFDM framework. This includes interpolation based on π / 2-BPSK modulation and / or 1+D precoding, ensuring that the maximum phase transition between adjacent modulation symbols is constrained within [-π / 2, π / 2]. This constraint of phase continuity produces near-constant envelope time-domain signal characteristics, resulting in the minimum amplitude fluctuation of the signal among all considered waveforms. Its typical PAPR value can be as low as 1 dB. Figure 7 This is a flowchart of another wireless communication method provided in an embodiment of this application. The embodiment of this application also describes the enabling process of the waveform adjustment function; see [link to relevant documentation]. Figure 7 The method provided in this application includes: Step 410: Receive configuration information sent by the second node, wherein the configuration information is used to configure at least one of the following: enable or disable waveform switching function based on HARQ status information; a first threshold and / or a second threshold; a candidate set of second waveforms available for switching.

[0055] In this embodiment, the first node can obtain configuration information sent by the second node. This configuration information can enable or disable waveform switching based on HARQ status information. When waveform adjustment based on the hybrid automatic repeat request status is enabled, subsequent waveform switching can be performed; otherwise, the waveform used for the transmission of the transport block is not switched. The second node can also send configuration information to the first node. This configuration information may include a threshold value used to trigger the switching of the first waveform to the second waveform. This threshold value may include, but is not limited to, a first threshold value and / or a second threshold value. The second node can also send a candidate set of configuration for the second waveform to the first node, for selecting the second waveform from the candidate set.

[0056] Step 420: Receive a negative HARQ acknowledgment for the transport block transmitted using the first waveform.

[0057] Step 430: Based on the HARQ status information associated with the transport block, determine to switch from the first waveform to the second waveform for HARQ retransmission of the transport block, wherein the peak-to-average power ratio of the second waveform is lower than that of the first waveform.

[0058] Step 440: Based on the second waveform and the scheduling authorization from the second node, send the HARQ retransmission of the transport block.

[0059] In one exemplary implementation, Figure 8This is an example diagram of a wireless communication method provided in an embodiment of this application. The waveform adaptive handover function of the UE is not always enabled, and the thresholds of its handover rules (such as retransmission count thresholds and channel degradation thresholds) can also be configured by the network. The network sends configuration information to the UE through higher-layer signaling such as RRC signaling, which can dynamically enable or disable the entire function, or adjust the sensitivity of triggering handover (for example, setting a higher retransmission count threshold in the central area of ​​the cell and a lower threshold in the edge area). This allows network operators to optimize from a global perspective, achieving a balance between improving retransmission success rate and reducing unnecessary waveform handover. See also Figure 8 The network side generates configuration information, which may include thresholds for handover rules and indications for waveform adaptation function switching. The network side sends the configuration information to the UE via RRC signaling, thereby activating the waveform adaptation function and configuring the thresholds. The UE receives and stores the configuration information. When the initial transmission of a transport block fails, the UE can evaluate the HARQ status information based on the configured thresholds and rules, thereby performing a waveform handover decision.

[0060] Figure 9 This is a flowchart of another wireless communication method provided in this application embodiment. This application embodiment is applicable to adjusting the waveform of the transmitted beam in HARQ retransmission. This method can be executed by a wireless communication device, which can be implemented by software and / or hardware methods, and is generally integrated into a second node. The second node may include network-side equipment such as a base station or core network element. See [link to relevant documentation]. Figure 9 The method provided in this application specifically includes the following steps: Step 510: Send a HARQ denial confirmation to the first node for the transport block using the first waveform.

[0061] Step 520: Obtain the channel state information report sent by the first node. The channel state information report is associated with the second waveform.

[0062] Specifically, the second node can obtain the channel state information report sent by the first node, which is associated with the second waveform used for the transmission of transport blocks.

[0063] Step 530: Based on the channel state information report, schedule resources for HARQ retransmission of the transport block and determine the modulation and coding scheme (MCS).

[0064] In this embodiment of the invention, a channel state information report sent by a first node can be received, and time-frequency resources can be allocated to the retransmitted transport block and a modulation and coding scheme can be determined according to the channel state information report.

[0065] Step 540: Send downlink control information to the first node to schedule the first node to use the second waveform for HARQ retransmission; wherein the peak-to-average power ratio of the second waveform is lower than that of the first waveform, and the first node determines the switch from the first waveform to the second waveform based on the HARQ status information associated with the transport block.

[0066] Specifically, the authorization can be determined according to the determined time-frequency resources and modulation and coding scheme, and the downlink control information corresponding to the authorization can be generated. The second node can send the downlink control information corresponding to the time-frequency resources and modulation and coding scheme to the first node, thereby controlling the first node to retransmit the transport block. The second waveform used in the retransmitted transport block can have a smaller peak-to-average power ratio (PAPR) than the first waveform used in the initial transmission. That is, the PAPR of the second beam of the retransmitted transport block is smaller than the PAPR of the first beam used in the initial transmission of the transport block. Furthermore, the first node determines the second waveform to switch from the first waveform based on the HARQ state information associated with the transport block.

[0067] In this embodiment, by obtaining the Hybrid Automatic Repeat Request (HAR) feedback indicating a transport block to be retransmitted sent by a first node, receiving the channel state information report sent by the first node, determining the time-frequency resources and modulation-coding scheme according to the channel state information report, and sending the downlink control information corresponding to the time-frequency resources and modulation-coding scheme to the first node, the first node retransmits the transport block. The peak-to-average power ratio (PAPR) of the second waveform used in the retransmission process of this transport block is lower than the PAPR of the first waveform used in the initial transmission. This embodiment of the invention can select a waveform with a smaller PAPR for transport block retransmission based on the HAR request status information, which can improve signal strength or coverage under the same power configuration, increase the success rate of transport block retransmission, and help improve system stability.

[0068] Figure 10 This is an example diagram of a waveform adjustment process provided in an embodiment of this application. In this embodiment, the processes on the UE side and gNB side are as follows: Figure 10 As shown, the waveform adjustment process may include the following steps: 1. Initial transmission: The UE sends data using the first waveform; 2. Failure and Decision: If the gNB fails to decode the data, it sends a NACK to the UE. After receiving the NACK, the UE decides to switch to the second waveform with a lower PAPR based on the HARQ status information. 3. Channel State Information (CSI) Interaction: The UE generates a new CSI report based on the second waveform measurement channel and reports it to the gNB, so that the network side can be informed of the waveform changes; 4. Network scheduling: After receiving the new CSI, the gNB allocates appropriate resources and MCS to the second waveform according to the channel conditions of the second waveform, and issues authorization through downlink control information (DCI); 5. Enhanced retransmission: The UE uses the second waveform to retransmit failed data according to the authorization sent by the network side, thereby improving the success rate of edge coverage of the network through the low PAPR characteristics of the second waveform. 6. Receive and merge: The gNB receives retransmitted data and performs soft merging and decoding with the initial transmitted data, thereby improving the success rate of data retransmission.

[0069] In this embodiment, the UE switches to a low PAPR waveform during retransmission and reports the corresponding CSI. Because the low PAPR waveform allows the PA to operate in a more efficient near-saturation region, the UE can radiate higher effective power at the same power consumption, thus improving the signal-to-noise ratio of the retransmitted signal. The network allocates more suitable resources based on the CSI. Therefore, the success rate of a single retransmission is improved, thereby reducing the average number of retransmissions and effectively reducing the overall transmission latency.

[0070] Based on the above-described embodiments, the HARQ status information includes at least one of the following: The number of retransmissions that have been performed on the transport block so far; The estimated amount of channel state change since the initial transmission of the transport block; The quality of service requirements or service type identifier of the service to which the transport block belongs.

[0071] Based on the above-described embodiments, switching to the second waveform based on HARQ state information includes at least one of the following: In response to determining that the number of retransmissions has reached or exceeded a first predetermined threshold, a switch from the first waveform to the second waveform is performed. In response to determining that the channel state change exceeds a second predetermined threshold, a switch from the first waveform to the second waveform is performed; In response to determining that the service type identifier indicates an Ultra Reliable Low Latency Communication (URLLC) service and that the number of retransmissions is greater than zero, a switch from the first waveform to the second waveform is performed.

[0072] The waveform switching decision in this embodiment can be based on multi-dimensional state information such as retransmission count, channel changes, and service QoS. The waveform decision logic is no longer a fixed strategy, but is adaptively adjusted according to link conditions and service requirements, so that the system can dynamically find the optimal balance between spectral efficiency, power efficiency, and reliability.

[0073] Figure 11This is a schematic diagram of a wireless communication device provided in an embodiment of this application. This device can execute the wireless communication method provided in any embodiment of this application, and has the corresponding functional modules and beneficial effects for executing the method. This device can be implemented by software and / or hardware. For example... Figure 11 As shown, the apparatus provided in this application embodiment specifically includes: The information feedback module 610 is used to receive a negative acknowledgment of a Hybrid Automatic Repeat Request (HARQ) for a transport block transmitted using the first waveform.

[0074] The transmission failure module 620 is used to determine, based on HARQ status information related to the transmission block, to switch from a first waveform to a second waveform for HARQ retransmission of the transmission block, wherein the peak-to-average power ratio of the second waveform is lower than that of the first waveform.

[0075] The retransmission execution module 630 is used to send HARQ retransmissions of transport blocks based on the second waveform and the scheduling authorization from the second node.

[0076] In this embodiment, when the information feedback module receives a negative acknowledgment of a Hybrid Automatic Repeat Request (HARQ) for a transport block transmitted using a first waveform, the transmission failure module determines, based on the HARQ status information related to the transport block, to switch from the first waveform to a second waveform for HARQ retransmission of the transport block. The retransmission execution module then uses the second waveform to retransmit the HARQ request for the transport block according to the scheduling authorization of the second node. This embodiment of the invention can select a waveform with a smaller peak-to-average power ratio (PAPR) for transport block retransmission based on the HARQ request status information, thereby improving signal strength or coverage under the same power configuration, increasing the success rate of transport block retransmission, and contributing to improved system stability.

[0077] Based on the above-described embodiments, the HARQ status information includes at least one of the following: The number of retransmissions that have been performed on the current transport block; The estimated amount of channel state change since the initial transmission of the transport block; The quality of service requirements or service type identifier of the service to which the transport block belongs.

[0078] Based on the above-described embodiments, the transmission failure module 620 determines, based on HARQ status information related to the transmission block, to switch from the first waveform to the second waveform for HARQ retransmission of the transmission block, including: In response to determining that the number of retransmissions has reached or exceeded a first predetermined threshold, a switch from the first waveform to the second waveform is performed.

[0079] Based on the above-described embodiments, the transmission failure module 620 determines, based on HARQ status information related to the transmission block, to switch from the first waveform to the second waveform for HARQ retransmission of the transmission block, including: In response to determining that the channel state change exceeds a second predetermined threshold, a switch from the first waveform to the second waveform is performed.

[0080] Based on the above-described embodiments, the transmission failure module 620 determines, based on HARQ status information related to the transmission block, to switch from the first waveform to the second waveform for HARQ retransmission of the transmission block, including: In response to determining that the service type identifier indicates an Ultra Reliable Low Latency Communication (URLLC) service and that the number of retransmissions is greater than zero, a switch from the first waveform to the second waveform is performed.

[0081] Based on the above-mentioned embodiments, the device further includes: a report transmission module, used to generate a channel state information report corresponding to the second waveform; and to send the channel state information report to the second node.

[0082] In some embodiments of the application, HARQ retransmission uses the same modulation and coding scheme (MCS) as the initial transmission of the transport block, or uses a modulation order lower than that of the MCS in the initial transmission.

[0083] In some embodiments, the first waveform and the second waveform are independently selected from the following set of waveforms, and the peak-to-average power ratio of the second waveform is lower than that of the first waveform: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform; Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveforms based on Discrete Fourier Transform extension; DFT-s-OFDM waveforms obtained by applying frequency domain spectrum shaping (FDSS); The phase transition of the modulation symbol is constrained within the range of π / 2 in the DFT-s-OFDM waveform; CP-OFDM waveform based on pitch-reserved TR.

[0084] Based on the above-described embodiments, the waveforms in the waveform set are categorized into the following levels according to their peak-to-average power ratio, from highest to lowest: Level 1: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveforms, including its CP-OFDM waveforms based on tone reservation TR; Second level: Orthogonal frequency division multiplexing (DFT-s-OFDM) waveforms based on the extended Discrete Fourier Transform (DFT). Third level: Applying frequency domain spectrum shaping (FDSS) to DFT-s-OFDM waveforms; Level 4: DFT-s-OFDM waveforms where the phase transition of the modulation symbol is constrained within the range of π / 2; The second waveform belongs to a lower level than the first waveform.

[0085] Based on some application embodiments, the combination of the first waveform and the second waveform is one of the following: The first waveform is the first-level waveform, and the second waveform is the second, third, or fourth-level waveform; The first waveform is a second-level waveform, and the second waveform is a third or fourth-level waveform; The first waveform is a third-level waveform, and the second waveform is a fourth-level waveform.

[0086] In some embodiments, the apparatus further includes: a configuration module, configured to receive configuration information sent by the second node, wherein the configuration information is used to configure at least one of the following: Enable or disable waveform switching based on HARQ status information; First threshold and / or second threshold; A candidate set of second waveforms that can be switched.

[0087] Figure 12 This is a schematic diagram of another wireless communication device provided in an embodiment of this application. This device can execute the wireless communication method provided in any embodiment of this application, and possesses the corresponding functional modules and beneficial effects for executing the method. This device can be implemented by software and / or hardware. For example... Figure 12 As shown, the apparatus provided in this application embodiment specifically includes: The confirmation feedback module 710 is used to send a HARQ denial confirmation to the first node for the transport block transmitted using the first waveform.

[0088] The retransmission feedback module 720 is used to obtain the channel state information report sent by the first node, and the channel state information report is associated with the second waveform.

[0089] The channel state module 730 is used to schedule resources for HARQ retransmission of transport blocks and determine the modulation and coding scheme (MCS) based on channel state information reports.

[0090] The retransmission control module 740 is used to send downlink control information to the first node to schedule the first node to use the second waveform for HARQ retransmission; wherein the peak-to-average power ratio of the second waveform is lower than that of the first waveform, and the first node determines to switch from the first waveform to the second waveform based on the HARQ status information associated with the transport block.

[0091] In this embodiment, the acknowledgment feedback module sends a HARQ denial confirmation to the first node for a transport block using the first waveform. The retransmission feedback module obtains the channel state information report sent by the first node, which is associated with the second waveform. Based on the channel state information report, the channel state module schedules resources for HARQ retransmission of the transport block and determines the modulation and coding scheme (MCS). The retransmission control module sends downlink control information to the first node to schedule the first node to use the second waveform for HARQ retransmission. The peak-to-average power ratio (PAPR) of the second waveform is lower than that of the first waveform, and the first node determines to switch from the first waveform to the second waveform based on the HARQ state information associated with the transport block. This embodiment of the invention can select a waveform with a smaller PAPR for transport block retransmission based on hybrid automatic repeat request (HARQ) state information, which can improve signal strength or coverage under the same power configuration, increase the success rate of transport block retransmission, and help improve system stability.

[0092] Figure 13 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device includes a processor 10, a memory 11, an input device 12, and an output device 13; the number of processors 10 in the electronic device can be one or more. Figure 13 Taking a processor 10 as an example; in an electronic device, the processor 10, memory 11, input device 12, and output device 13 can be connected via a bus or other means. Figure 13 Taking the example of a connection between China and Israel via a bus.

[0093] The memory 11, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the modules corresponding to the wireless communication device in the embodiments of this application. The processor 10 executes various functional applications and data processing of the electronic device by running the software programs, instructions, and modules stored in the memory 11, thereby implementing the above-described method.

[0094] The memory 11 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created based on the use of the electronic device. Furthermore, the memory 11 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. In some instances, the memory 11 may further include memory remotely located relative to the processor 10, which can be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0095] Input device 12 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the electronic device. Output device 13 may include display devices such as a display screen.

[0096] This application also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform a wireless communication method, the method comprising: Receive a negative HARQ acknowledgment for a transport block transmitted using the first waveform; Based on the HARQ state information associated with the transport block, it is determined to switch from the first waveform to the second waveform for HARQ retransmission of the transport block, wherein the peak-to-average power ratio of the second waveform is lower than that of the first waveform. Based on the second waveform and the scheduling authorization from the second node, the HARQ retransmission of the transport block is sent.

[0097] Alternatively, the computer-executable instructions, when executed by a computer processor, are used to perform a wireless communication method, the method comprising: Send a HARQ denial confirmation to the first node for the transport block transmitted using the first waveform; Obtain the channel state information report sent by the first node, the channel state information report being associated with the second waveform; Based on the channel state information report, HARQ retransmission scheduling resources are allocated for the transport block and the modulation and coding scheme (MCS) is determined. Send downlink control information to the first node to schedule the first node to use the second waveform for the HARQ retransmission; Wherein, the peak-to-average power ratio of the second waveform is lower than that of the first waveform, and the first node determines to switch from the first waveform to the second waveform based on the HARQ state information associated with the transport block.

[0098] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0099] It is worth noting that in the embodiments of the above-mentioned device, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of this application.

[0100] Those skilled in the art will understand that all or some of the steps, apparatuses, or functional modules / units in the methods disclosed above can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0101] In hardware implementations, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. The corresponding software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0102] The above description, with reference to the accompanying drawings, illustrates preferred embodiments of the present invention, but does not limit the scope of the invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and spirit of the present invention should be considered within the scope of the present invention.

Claims

1. A wireless communication method, characterized in that, Applied to the first node, the method includes: Receive a negative HARQ acknowledgment for a transport block transmitted using the first waveform; Based on the HARQ state information associated with the transport block, it is determined to switch from the first waveform to the second waveform for HARQ retransmission of the transport block, wherein the peak-to-average power ratio of the second waveform is lower than that of the first waveform. Based on the second waveform and the scheduling authorization from the second node, the HARQ retransmission of the transport block is sent.

2. The method according to claim 1, characterized in that, The HARQ status information includes at least one of the following: The number of retransmissions that have been performed on the current transport block; The estimated amount of channel state change since the initial transmission of the transport block; The quality of service requirements or service type identifier of the service to which the transport block belongs.

3. The method according to claim 2, characterized in that, The step of determining the switch from the first waveform to the second waveform for HARQ retransmission of the transport block based on HARQ state information associated with the transport block includes: In response to determining that the number of retransmissions has reached or exceeded a first predetermined threshold, a switch from the first waveform to the second waveform is performed.

4. The method according to claim 2, characterized in that, The step of determining the switch from the first waveform to the second waveform for HARQ retransmission of the transport block based on HARQ state information associated with the transport block includes: In response to determining that the channel state change exceeds a second predetermined threshold, a switch from the first waveform to the second waveform is performed.

5. The method according to claim 2, characterized in that, The step of determining the switch from the first waveform to the second waveform for HARQ retransmission of the transport block based on HARQ state information associated with the transport block includes: In response to determining that the service type identifier indicates an Ultra Reliable Low Latency Communication (URLLC) service and that the number of retransmissions is greater than zero, a switch from the first waveform to the second waveform is performed.

6. The method according to claim 1, characterized in that, Also includes: Generate a channel state information report corresponding to the second waveform; Send the channel status information report to the second node.

7. The method according to claim 1, characterized in that, The HARQ retransmission uses the same modulation and coding scheme (MCS) as the initial transmission of the transport block, or uses a modulation order lower than that of the MCS in the initial transmission.

8. The method according to claim 1, characterized in that, The first waveform and the second waveform are independently selected from the following set of waveforms, and the peak-to-average power ratio of the second waveform is lower than that of the first waveform: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform; Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveforms based on Discrete Fourier Transform extension; DFT-s-OFDM waveforms obtained by applying frequency domain spectrum shaping (FDSS); The phase transition of the modulation symbol is constrained within the range of π / 2 in the DFT-s-OFDM waveform; CP-OFDM waveform based on pitch-reserved TR.

9. The method according to claim 8, characterized in that, The waveforms in the waveform set are divided into the following levels according to their peak-to-average power ratio, from high to low: Level 1: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) waveforms, including its CP-OFDM waveforms based on tone reservation TR; Second level: Orthogonal frequency division multiplexing (DFT-s-OFDM) waveforms based on the extended Discrete Fourier Transform (DFT). Third level: Applying frequency domain spectrum shaping (FDSS) to DFT-s-OFDM waveforms; Level 4: DFT-s-OFDM waveforms where the phase transition of the modulation symbol is constrained within the range of π / 2; The second waveform belongs to a lower level than the first waveform.

10. The method according to claim 9, characterized in that, The combination of the first waveform and the second waveform is one of the following: The first waveform is a first-level waveform, and the second waveform is a second, third, or fourth-level waveform; The first waveform is a second-level waveform, and the second waveform is a third or fourth-level waveform. The first waveform is a third-level waveform, and the second waveform is a fourth-level waveform.

11. The method according to claim 1, characterized in that, Also includes: Receive configuration information sent by the second node, wherein the configuration information is used to configure at least one of the following: Enable or disable waveform switching based on the HARQ status information; The first threshold and / or the second threshold; A candidate set of the second waveform that can be switched.

12. A wireless communication method, characterized in that, Applied to the second node, the method includes: Send a HARQ denial confirmation to the first node for the transport block transmitted using the first waveform; Obtain the channel state information report sent by the first node, the channel state information report being associated with the second waveform; Based on the channel state information report, HARQ retransmission scheduling resources are allocated for the transport block and the modulation and coding scheme (MCS) is determined. Send downlink control information to the first node to schedule the first node to use the second waveform for the HARQ retransmission; Wherein, the peak-to-average power ratio of the second waveform is lower than that of the first waveform, and the first node determines to switch from the first waveform to the second waveform based on the HARQ state information associated with the transport block.

13. An electronic device, characterized in that, The electronic device includes: One or more processors; Memory, used to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement a wireless communication method as described in any one of claims 1-12.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores one or more programs, which are executed by one or more processors to implement a wireless communication method as described in any one of claims 1-12.

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