Transmission waveform switching indication method and device, network equipment, terminal and medium

Abstract

The invention provides a transmission waveform switching indication method and device, network equipment, a terminal and a medium, and relates to the technical field of wireless communication. The transmission waveform switching indication method comprises: configuring a reservation value of a specified field in downlink control information (DCI) as a waveform switching indication, the waveform switching indication being used for indicating a terminal to switch an uplink transmission waveform, and the specified field being a field having the reservation value in the DCI; and sending the DCI carrying the waveform switching indication to the terminal. Through the technical scheme of the invention, on one hand, a new field configuration switching instruction does not need to be defined, the field of the DCI does not need to be modified too much, the change to the terminal function is small, and the forward compatibility is ensured, and on the other hand, the dynamic switching of the uplink transmission waveform is realized based on the configuration of the reserved value of the specified field in the DCI, and the switching efficiency is improved. Therefore, the dynamic matching of the uplink transmission waveform and the channel state can be realized, and the loss of the transmission performance can be reduced.

Description

Background Art

[0002] The transmission waveforms supported by the NR (New Radio) system in uplink transmission include: DFT-S-OFDM (Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing) and CP-OFDM (Cyclic Prefix Orthogonal Frequency Division Multiplexing).

[0003] According to the latest 3GPP Rel-17 protocol, only semi-static configuration of uplink transmission waveforms through radio resource control (RRC) signaling is supported, and uplink transmission waveforms cannot be switched dynamically, which may cause certain transmission performance losses.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present disclosure is to provide a method, device, network equipment, terminal and storage medium for indicating switching of a transmission waveform, which at least to a certain extent overcomes the problem in the related art that a terminal cannot be dynamically indicated to switch an uplink transmission waveform.

[0006] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0007] According to one aspect of the present disclosure, a method for indicating switching of a transmission waveform is provided, which is applied to a base station, and includes: configuring a reserved value of a specified field in downlink control information DCI as a waveform switching indication, wherein the waveform switching indication is used to instruct a terminal to switch an uplink transmission waveform, and the specified field is a field in the DCI having the reserved value; and sending the DCI carrying the waveform switching indication to the terminal.

[0008] In one embodiment, configuring the reserved value of a specified field in the downlink control information DCI as the waveform switching indication includes: configuring the reserved value of the specified field in the DCI as the waveform switching indication based on a channel state.

[0009] In one embodiment, the waveform switching indication is used to instruct the terminal to switch the uplink transmission waveform, including: the waveform switching indication is used to instruct the terminal to switch from a first uplink transmission waveform to a second uplink transmission waveform.

[0010] In one embodiment, the format of the DCI used to configure the waveform switching indication is a DCI format for scheduling an uplink physical shared channel PUSCH.

[0011] In one embodiment, the designated field includes a field indicating a modulation and coding strategy (MCS) in the DCI.

[0012] In one embodiment, configuring the reserved value of a specified field in the downlink control information DCI as a waveform switching indication includes: determining a binary representation corresponding to the reserved value in the MCS; splitting the binary representation into at least two groups of reserved values, the at least two groups of reserved values ​​including a first group of reserved values ​​and a second group of reserved values ​​with different values, the first group of reserved values ​​being configured to indicate that the terminal switches from a first uplink transmission waveform to a second uplink transmission waveform, and the second group of reserved values ​​being used to configure an MCS index that matches the second uplink transmission waveform; and generating the waveform switching indication based on the at least two groups of reserved values.

[0013] In one embodiment, after sending the DCI carrying the waveform switching indication to the terminal, it also includes: configuring the MCS index greater than or equal to the index threshold as a switchback indication, and the switchback indication is used to indicate the switch from the second uplink transmission waveform to the first uplink transmission waveform.

[0014] In one embodiment, it also includes: detecting that the level of the MCS configured by the second set of reserved values ​​initially selected does not meet communication requirements, reselecting the second set of reserved values ​​to adjust the MCS index, and resending the adjusted DCI.

[0015] In one embodiment, the designated field includes a Transmission Precoding Matrix Indicator (TPMI) field in the DCI.

[0016] In one embodiment, configuring the reserved value of a specified field in the downlink control information DCI as the waveform switching indication includes: selecting the reserved value in the TPMI field within a specified range to generate the waveform switching indication.

[0017] In one embodiment, after sending the DCI carrying the waveform switching indication to the terminal, it also includes: configuring the value of the TPMI field to be greater than a specified threshold value, so as to generate a switchback indication based on the configuration result, and the switchback indication is used to indicate the switching from the second uplink transmission waveform to the first uplink transmission waveform, wherein the specified threshold value is a threshold value pre-agreed between the base station and the terminal.

[0018] In one embodiment, before sending the downlink control information DCI, the method further includes: receiving information on the dynamic waveform switching capability reported by the terminal.

[0019] According to another aspect of the present disclosure, a transmission waveform switching indication method is provided, which is applied to a terminal, including: receiving downlink control information DCI; when detecting that the DCI carries a waveform switching indication, switching the uplink transmission waveform in the next time slot based on the waveform switching indication.

[0020] In one embodiment, switching the uplink transmission waveform in the next time slot based on the waveform switching indication includes: switching the first uplink transmission waveform to the second uplink transmission waveform in the next time slot based on the waveform switching indication.

[0021] In one embodiment, switching the first uplink transmission waveform to the second uplink transmission waveform in the next time slot based on the waveform switching indication includes: when detecting that the MCS field in the DCI includes a first group of reserved values, determining to carry the waveform switching indication, and switching from the first uplink transmission waveform to the second uplink transmission waveform.

[0022] In one embodiment, it also includes: when it is detected that the MCS field in the DCI includes a second group of reserved values, determining the corresponding MCS index based on the second group of reserved values; determining the MCS for scheduling PUSCH based on the corresponding MCS index; and transmitting data using the second uplink transmission waveform based on the MCS for scheduling PUSCH.

[0023] In one embodiment, the method further includes: after switching to the second uplink transmission waveform, detecting that the MCS index in the DCI received again is greater than an index threshold, and switching from the second uplink transmission waveform to the first uplink transmission waveform.

[0024] In one embodiment, when it is detected that the DCI carries a waveform switching indication, switching the uplink transmission waveform based on the waveform switching indication includes: if a reserved value within a specified range is detected in the TPMI field of the DCI, determining that the waveform switching indication is carried, and switching from the first uplink transmission waveform to the second uplink transmission waveform.

[0025] In one embodiment, the method further includes: performing value processing on the TPMI based on a lower limit value of the specified range, so as to determine a precoding matrix to be used based on a value processing result.

[0026] In one embodiment, when it is detected that the DCI carries a waveform switching indication, switching the uplink transmission waveform based on the waveform switching indication includes: if it is detected that the value of the TPMI field is greater than a limited threshold, determining to carry the waveform switching indication, and switching the second uplink transmission waveform to the first uplink transmission waveform, wherein the limited threshold is a threshold pre-agreed between the base station and the terminal.

[0027] In one embodiment, before receiving downlink control information DCI, the method further includes: reporting information having dynamic waveform switching capability to the base station.

[0028] In one embodiment, the first uplink transmission waveform is CP-OFDM, and the second uplink transmission waveform is DFT-S-OFDM.

[0029] According to another aspect of the present disclosure, a switching indication device for a transmission waveform is provided, comprising: a configuration module, configured to configure a reserved value of a specified field in downlink control information DCI as a waveform switching indication, wherein the waveform switching indication is used to instruct a terminal to switch an uplink transmission waveform, and the specified field is a field in the DCI having the reserved value; and a sending module, configured to send the DCI carrying the waveform switching indication to the terminal.

[0030] According to another aspect of the present disclosure, a transmission waveform switching indication device is provided, which is applied to a terminal, and includes: a receiving module, which is used to receive downlink control information DCI; a switching module, which is used to switch the uplink transmission waveform in the next time slot based on the waveform switching indication when detecting that the DCI carries a waveform switching indication.

[0031] According to another aspect of the present disclosure, a network device is provided, comprising: a processor; and a memory for storing executable instructions of the processor; the processor is configured to execute the switching indication method of the transmission waveform of the first aspect mentioned above by executing the executable instructions.

[0032] According to another aspect of the present disclosure, a terminal is provided, comprising: a processor; and a memory for storing executable instructions of the processor; the processor is configured to execute the transmission waveform switching indication method of the second aspect mentioned above by executing the executable instructions.

[0033] According to another aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned method for indicating switching of a transmission waveform is implemented.

[0034] The transmission waveform switching indication scheme provided by the embodiments of the present disclosure uses a specific reserved value of a designated field in the uplink scheduling DCI to perform an uplink channel waveform switching indication, and indicates the regular scheduling and configuration of the uplink channel while realizing dynamic switching of the indication waveform. On the one hand, the configuration of the specific reserved value does not require the definition of a new field configuration switching indication, and there is no need to make excessive modifications to the DCI field, which has a small impact on the terminal function and is conducive to ensuring forward compatibility. On the other hand, based on the configuration of the reserved value of the designated field in the DCI, the dynamic switching of the uplink transmission waveform is realized, and then the dynamic matching of the uplink transmission waveform and the channel state can be realized, which is conducive to reducing the loss of transmission performance.

[0035] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0037] Figure 1 A schematic diagram showing a switching indication system for a transmission waveform in an embodiment of the present disclosure is shown;

[0038] Figure 2 A flow chart of a switching indication method for a transmission waveform in an embodiment of the present disclosure is shown;

[0039] Figure 3 A flow chart showing another method for indicating switching of a transmission waveform in an embodiment of the present disclosure is shown;

[0040] Figure 4 A flow chart of another transmission waveform switching indication method according to an embodiment of the present disclosure is shown;

[0041] Figure 5 A flow chart of another transmission waveform switching indication method according to an embodiment of the present disclosure is shown;

[0042] Figure 6 A flow chart of another transmission waveform switching indication method according to an embodiment of the present disclosure is shown;

[0043] Figure 7 A schematic diagram showing a switching indication device for a transmission waveform in an embodiment of the present disclosure is shown;

[0044] Figure 8A schematic diagram showing another switching indication device for transmission waveform in an embodiment of the present disclosure;

[0045] Fig. 9 A structural block diagram of a computer device in an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0046] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0047] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0048] In 5G, the waveform used for uplink transmission is configured by the base station. The NR system supports two transmission waveforms in uplink transmission, namely DFT-S-OFDM and CP-OFDM.

[0049] Among them, the advantage of DFT-S-OFDM is its low peak-to-average ratio and good power amplifier efficiency. The disadvantage is that the frequency domain resource allocation must be continuous and currently only supports single-stream transmission. Therefore, it is more suitable for situations with poor channel conditions, such as serving cell edge users to improve coverage performance.

[0050] The advantage of CP-OFDM is that it supports non-continuous resource allocation and multi-stream transmission, and can provide higher data rates. The disadvantage is that the peak-to-average ratio is relatively high. Therefore, it is more suitable for situations with better channel conditions, such as serving users near and midpoints of the cell to improve system capacity.

[0051] PDCCH (Physical Downlink Control Channel) is a control channel defined by the NR standard. The payload carried on PDCCH is called downlink control information (DCI). DCI contains uplink or downlink data channel scheduling information and other control information for a terminal or a group of terminals.

[0052] Currently, some fields in the DCI used for uplink scheduling in NR still have reserved information and have the potential to be used for waveform switching indication. Therefore, by configuring this reserved information, dynamic indication of switching of uplink transmission waveforms can be achieved.

[0053] According to the technical solution disclosed in the present invention, by multiplexing the existing fields of the uplink scheduling DCI to complete the waveform switching indication, the efficient and flexible switching and the stable communication performance are guaranteed.

[0054] Figure 1 A schematic diagram of a 5G core network networking architecture in an embodiment of the present disclosure is shown.

[0055] like Figure 1 As shown, a networking architecture of an independently networked 5G core network includes a 5G core network 102, a 5G base station 104 and a terminal 106.

[0056] Among them, the 5G core network 102 and the 5G base station 104 are connected based on the NG interface, and the 5G base stations 104 are connected based on the Xn interface.

[0057] In addition, the interaction between the 5G base station 104 and the terminal 106 includes the downlink control information DCI sent by the 5G base station 104 to the terminal 106, which is used to carry the downlink control information of one or more cells with an RNTI (Radio Network Temporary Identity). It also provides the terminal 106 with physical layer resource allocation, power control commands, uplink and downlink HARQ and other information. DCI is transmitted through PDCCH (Physical Downlink Control Channel).

[0058] In the 5G system, that is, the NR system, the DCI format can be divided into at least three types, including: uplink allocation DCI Format 0_x, downlink allocation DCI Format 1_x and UE group common signaling DCI Format2_x.

[0059] In the present disclosure, by defining the dynamic switching indication for the reserved information of some fields in the above-mentioned DCI, the dynamic switching indication of the transmission waveform can be realized.

[0060] In addition, those skilled in the art will appreciate that the transmission waveform switching indication disclosed herein is also applicable to the networking architecture of a non-independent 5G core network.

[0061] In the following, each step of the method for indicating switching of a transmission waveform in this exemplary implementation will be described in more detail with reference to the accompanying drawings and embodiments.

[0062] Figure 2 A flow chart of a switching indication method for a transmission waveform in an embodiment of the present disclosure is shown.

[0063] like Figure 2 As shown, according to a transmission waveform switching indication method of an embodiment of the present disclosure, a transmission waveform switching indication method is applied to a base station, comprising:

[0064] Step S202: configure the reserved value of the designated field in the downlink control information DCI as a waveform switching indication, where the waveform switching indication is used to instruct the terminal to switch the uplink transmission waveform, and the designated field is a field with a reserved value in the DCI.

[0065] Wherein, based on the waveform switching indication, the terminal is instructed to switch the uplink transmission waveform. In one embodiment, the terminal is instructed to switch the uplink transmission waveform, including: instructing the terminal to switch from a first uplink transmission waveform to a second uplink transmission waveform; and / or instructing the terminal to switch from the second uplink transmission waveform to the first uplink transmission waveform.

[0066] In one embodiment, the first uplink transmission waveform is CP-OFDM, and the second uplink transmission waveform is DFT-S-OFDM.

[0067] Specifically, the waveform switching indication is generated based on the channel state, specifically by determining the quality of the current uplink channel by detecting the channel state, thereby determining the uplink transmission waveform of the matching terminal based on the quality of the current channel to ensure the reliability of the uplink transmission.

[0068] In addition, the designated field in the DCI refers to a field whose specific value has been reserved but has not been given a clear meaning. For example, a field has a total of 5 bits and the values ​​range from 0 to 31. Among these values, there are values ​​that are not given a clear meaning, that is, reserved values. By configuring the reserved value as an indication flag, the corresponding waveform switching indication can be generated and sent to the corresponding terminal through the DCI to instruct the terminal to switch the uplink transmission waveform.

[0069] Step S204: Send a DCI carrying a waveform switching indication to the terminal.

[0070] The terminal receiving the DCI is specifically a terminal with dynamic waveform switching capability.

[0071] In this embodiment, uplink channel waveform switching indication is performed by using a specific reserved value of a designated field in the uplink scheduling DCI. While realizing dynamic switching of the indicated waveform, the conventional scheduling and configuration of the uplink channel are indicated. On the one hand, the configuration of the specific reserved value does not require definition of a new field configuration switching indication, and there is no need to make excessive modifications to the DCI field, resulting in little change to the terminal function, which is beneficial to ensuring forward compatibility. On the other hand, based on the configuration of the reserved value of the designated field in the DCI, dynamic switching of the uplink transmission waveform is realized, thereby enabling dynamic matching of the uplink transmission waveform and the channel state, which is beneficial to reducing the loss of transmission performance.

[0072] In one embodiment, configuring a reserved value of a specified field in downlink control information DCI as a waveform switching indication includes: configuring a reserved value of a specified field in DCI as a waveform switching indication based on a channel state.

[0073] The channel state information may be obtained based on a CSI-RS (Channel State Information-Reference Signal), and based on the operation of obtaining the channel state information, the channel between the base station and the terminal is measured to obtain the channel state.

[0074] In this embodiment, by determining to use a specific reserved value of a designated field in the uplink scheduling DCI to perform an uplink channel waveform switching indication based on the detection result of the channel state, dynamic matching of the uplink transmission waveform and the channel state is achieved.

[0075] In one embodiment, the format of the DCI used to configure the waveform switching indication is a DCI format for scheduling an uplink physical shared channel PUSCH.

[0076] Among them, the DCI format for scheduling the uplink physical shared channel PUSCH includes at least one of DCI Format0_0, DCIFormat0_1 and DCI Format0_2. DCI Format0_0 is used for scheduling PUSCH in the cell. The following information is CRC-scrambled through C-RNTI (UE unique identifier, used for RRC connection and scheduling) or CS-RNTI (UE unique identifier, used for semi-persistent scheduling of downlink or uplink authorization configuration) or MCS-C-RNTI (UE unique identifier, used to indicate MCS table options for PDSCH and PUSCH channels), and then transmitted in DCI Format0_0. DCI Format 0_1 ​​is used for scheduling one or more PUSCHs in the serving cell. The following information is CRC-scrambled through C-RNTI or CS-RNTI or SP-CSI-RNTI (unique UE identifier, used to identify semi-persistent CSI reports on PUSCH) or MCS-C-RNTI, and then sent through DCIFormat0_1. DCI Format 0_2 is also PUSCH scheduling. The following information is CRC-scrambled through C-RNTI or CS-RNTI or SP-CSI-RNTI or MCS-C-RNTI and then transmitted through the DCI.

[0077] Specifically, since specific values ​​of some fields in DCI Format0_0, DCI Format0_1 and DCIFormat0_2 in the NR standard (TS 38.212) are still reserved but not clearly defined, a waveform switching indication is generated by using specific values ​​of these fields as indication flags. When the DCE carrying the waveform switching indication is transmitted to the terminal and the terminal supporting dynamic waveform switching detects the corresponding field value of the waveform switching indication, the waveform switching is performed in the next time slot. The waveform refers to one of the two waveforms, DFT-s-OFDM or CP-OFDM. Furthermore, those skilled in the art can understand that other scheduling configurations sent to the terminal are also configured for the transformed waveform.

[0078] In addition, when the waveform switching indication is made for the first time, although it is subject to the length of the corresponding DCI field and the number of reserved values, the scheduling information carried by the DCI used for dynamic switching indication should be as consistent as possible with the current communication needs. If it is significantly different from the current communication needs, it needs to be readjusted in the next DCI scheduling cycle. In order to shorten the scheduling cycle as soon as possible, the network side can also arrange the next scheduling as soon as possible.

[0079] In one embodiment, the designated field includes a field in the DCI indicating a modulation and coding strategy MCS.

[0080] Among them, MCS (Modulation and Coding Scheme) defines the number of valid bits that a RE (Resource Element) can carry. There are 0 to 31 MCS schemes, of which 28 to 31 are reserved values ​​for the specified field. The choice of which MCS depends on the quality of the wireless link. The higher the quality, the higher the MCS, and the more useful bits can be transmitted in one symbol. If the signal quality is poor, only a low-index MCS can be selected, which means that fewer useful data tables can be transmitted in one symbol. Specifically, the base station can select the MCR based on the block error rate (Block Error Rate, BLER).

[0081] In one embodiment, configuring the reserved value of a specified field in the downlink control information DCI as a waveform switching indication includes:

[0082] Determine the binary representation corresponding to the reserved values ​​in the MCS.

[0083] Among them, in the current 5G standard, the field used to indicate the modulation and coding strategy (MCS) in DCI Format0_0, DCI Format0_1 and DCI Format0_2 has a total of 5 bits, with values ​​ranging from 0 to 31. Among them, there is no corresponding modulation and coding scheme for the values ​​28, 29, 30, and 31. The binary representation corresponding to these four values ​​is 111xx (x=0 / 1).

[0084] The binary representation is split into at least two groups of reserved values, wherein the at least two groups of reserved values ​​include a first group of reserved values ​​and a second group of reserved values ​​with different values, wherein the first group of reserved values ​​is configured to indicate that the terminal switches from a first uplink transmission waveform to a second uplink transmission waveform, and the second group of reserved values ​​is used to configure an MCS index matching the second uplink transmission waveform.

[0085] Among them, in order to use the values ​​of the above-mentioned fields to indicate the occurrence of waveform switching, for the terminal that reports that it has dynamic waveform switching capability, a DCI carrying a waveform switching indication is sent down. When the terminal detects that the first three binary bits of the field are "111", the waveform switching operation is performed. At this time, the values ​​of the last two bits 0-3 can be used to set the MCS value 0-3, thereby completing the rough MCS level configuration of the PUSCH scheduling of the terminal. The scheduling information indicated by the remaining corresponding fields is also the corresponding configuration applied after the waveform switching occurs.

[0086] A waveform switching indication is generated based on at least two sets of retained values.

[0087] In addition, if the MCS level configured corresponding to the first dynamic switching indication is lower, the DCI may be sent again to indicate the corresponding MCS level. In this case, it will no longer be used as a dynamic switching indication when it is sent again.

[0088] In this embodiment, the waveform switching indication is configured by configuring the specific field values ​​of the MCS in DCI Format0_0, DCI Format0_1 and DCI Format0_2 to instruct the terminal to perform uplink waveform switching, which is beneficial to improving the network coverage based on the uplink transmission waveform after switching.

[0089] In this embodiment, since the waveform energy of the second uplink transmission waveform DFT-s-OFDM is more concentrated than that of the first uplink transmission waveform CP-OFDM, it can operate under conditions with a lower signal-to-noise ratio and better coverage performance, and is mostly used in environments with poor channel conditions. Therefore, when a poor channel condition is detected, it is necessary to switch from CP-OFDM to DFT-s-OFDM in a timely manner to meet the user's minimum communication requirements. Therefore, the initial waveform switching operation of the present invention is also to switch from CP-OFDM to DFT-s-OFDM. At this time, the MCS level selected by the user should also be at a lower level to ensure basic communication quality, so MCS levels 0-3 can usually meet current communication requirements.

[0090] In one embodiment, after sending a DCI carrying a waveform switching indication to the terminal, it also includes: configuring an MCS index greater than or equal to an index threshold as a switchback indication, wherein the switchback indication is used to indicate switching from the second uplink transmission waveform to the first uplink transmission waveform.

[0091] In this embodiment, when it is detected that the channel state is better, the terminal wishes to switch back to the first uplink transmission waveform CP-OFDM, and the corresponding MCS level in the waveform switching indication should also be higher. Therefore, an index threshold can be set for the MCS level, so that after the uplink transmission waveform switching occurs, based on the indicated MCS value in the DCI that is higher than the index threshold, the terminal can reliably switch back to the first uplink transmission waveform CP-OFDM.

[0092] In one embodiment, the method further includes: detecting that the level of the MCS configured by the second set of reserved values ​​initially selected does not meet the communication requirements, reselecting the second set of reserved values ​​to adjust the MCS index, and resending the adjusted DCI.

[0093] The MCS index corresponds to the level of the MCS.

[0094] In this embodiment, in order to ensure the communication quality, it is necessary to configure a matching MCS level to ensure that the bit error rate BLER does not exceed a threshold under different wireless conditions.

[0095] In one embodiment, the designated field includes a Transmit Precoding Matrix Indicator (TPMI) field in the DCI.

[0096] Among them, the precoding matrix indication (Pre-coding Matrix Indicator, PMI) means that only in a certain transmission mode of closed-loop spatial multiplexing, the terminal (UE) tells the base station (eNode B) what kind of precoding matrix should be used to precode the PDSCH channel of the UE. By specifying the transmitted precoding matrix indication (Transmitted Precoding Matrix Indicator, TPMI) for the uplink transmission of the terminal, the terminal uses the specified precoding matrix to precode the transmitted data and send it to the base station.

[0097] In this embodiment, TPMI may also be selected to configure the waveform switching indication, so as to implement the indication of dynamic switching of the uplink transmission waveform based on the reserved value of the existing designated field.

[0098] In one embodiment, configuring the reserved value of a specified field in the downlink control information DCI as a waveform switching indication includes:

[0099] Selecting the retained values ​​in the TPMI field that are within the specified range generates a waveform switching indication.

[0100] Specifically, when instructing to switch the first uplink transmission waveform to the second uplink transmission waveform, TPMI can be selected as a scheduling waveform switching indication. When the terminal is in the first uplink transmission waveform CP-OFDM, there are more reserved values ​​of the TPMI parameter in the DCI, and the reserved values ​​are slightly different depending on the current number of data streams and the number of antennas. Taking CP-OFDM with 1-stream DMRS-type=1 as an example, when it is detected that TPMI in the DCI is the reserved parameter n (6<=n<=7), the waveform switching is enabled, and the value n-6 should be selected at this time.

[0101] In this embodiment, by giving a new meaning to the reserve item in TPMI, that is, the parameter reserved value, the final selected value is obtained invisibly, thereby realizing dynamic waveform switching.

[0102] In one embodiment, after sending a DCI carrying a waveform switching indication to the terminal, it also includes: configuring the value of the TPMI field to be greater than a specified threshold value, so as to generate a switchback indication based on the configuration result, and the switchback indication is used to indicate the switch from the second uplink transmission waveform to the first uplink transmission waveform, wherein the specified threshold value is a threshold value pre-agreed between the base station and the terminal.

[0103] Specifically, after the terminal switches to the second uplink transmission waveform DFT-s-OFDM, if the value of TPMI received in the DCI is greater than a limited threshold (the limited threshold is a threshold or a specific value agreed in advance between the network side and the UE side), it switches back to the first uplink transmission waveform CP-OFDM.

[0104] In addition, those skilled in the art can understand that specifying the field as MCS or TPMI is just two implementation methods given in the embodiments of the present disclosure, and any field in the DCI with a reserved value configured as a waveform switching indication falls within the protection scope of the present disclosure.

[0105] like Figure 3 As shown, taking the waveform switching indication configuration based on the specified field in the MCS as an example, a switching indication method for a transmission waveform according to another embodiment of the present disclosure includes:

[0106] Step S302: receiving information reported by a terminal on the ability to dynamically switch waveforms.

[0107] Step S304, when a poor channel state is detected, a first set of reserved values ​​of a specified field in the DCI is configured to indicate that the terminal switches from a first uplink transmission waveform to a second uplink transmission waveform, and a second set of reserved values ​​that configures the MCS index to be less than or equal to an index threshold is selected to configure the MCS level, and a waveform switching indication is generated based on the first set of reserved values ​​and the second set of reserved values.

[0108] The designated field in the DCI may be a field in the MCS and / or a field in the TPMI, etc.

[0109] Step S306: Send DCI to a terminal with dynamic waveform switching capability, so that the terminal switches from the first uplink transmission waveform to the second uplink transmission waveform.

[0110] Step S308: When it is detected that the channel state is good, the MCS index in the DCI is reconfigured to be greater than the index threshold, and the MCS level is configured accordingly, and a switchback instruction is generated.

[0111] Step S310: sending a DCI carrying a switch-back instruction to the terminal with dynamic waveform switching capability again, so that the terminal switches from the second uplink transmission waveform back to the first uplink transmission waveform.

[0112] like Figure 4 As shown, according to another embodiment of the present disclosure, a method for indicating switching of a transmission waveform is applied to a terminal, and includes:

[0113] Step S402: receiving downlink control information DCI.

[0114] Step S404: when it is detected that the DCI carries a waveform switching indication, the uplink transmission waveform is switched in the next time slot based on the waveform switching indication.

[0115] In this embodiment, when the terminal receives the DCI carrying the waveform switching indication, it indicates the normal scheduling and configuration of the uplink channel while realizing the dynamic switching of the indicated waveform. On the one hand, the configuration of a specific reserved value does not require the definition of a new field configuration switching indication, and there is no need to make excessive modifications to the DCI fields, which makes little change to the terminal function and is conducive to ensuring forward compatibility. On the other hand, based on the configuration of the reserved value of the specified field in the DCI, the dynamic switching of the uplink transmission waveform is realized, and then the dynamic matching of the uplink transmission waveform and the channel state can be realized, which is conducive to reducing the loss of transmission performance.

[0116] In one embodiment, switching the uplink transmission waveform in the next time slot based on the waveform switching indication includes: switching the first uplink transmission waveform to the second uplink transmission waveform in the next time slot based on the waveform switching indication.

[0117] In one embodiment, switching the first uplink transmission waveform to the second uplink transmission waveform in the next time slot based on the waveform switching indication includes: when detecting that the MCS field in the DCI includes a first group of reserved values, determining to carry the waveform switching indication, and switching the first uplink transmission waveform to the second uplink transmission waveform.

[0118] In one embodiment, it also includes: when it is detected that the MCS field in the DCI includes a second group of reserved values, determining the corresponding MCS index based on the second group of reserved values; determining the MCS for scheduling PUSCH based on the corresponding MCS index; and transmitting data using a second uplink transmission waveform based on the MCS for scheduling PUSCH.

[0119] In one embodiment, the method further includes: after switching to the second uplink transmission waveform, detecting that the MCS index in the DCI received again is greater than the index threshold, and switching from the second uplink transmission waveform to the first uplink transmission waveform.

[0120] In one embodiment, when it is detected that the DCI carries a waveform switching indication, the uplink transmission waveform is switched based on the waveform switching indication, including: if a reserved value within a specified range is detected in the TPMI field of the DCI, determining that the waveform switching indication is carried, and switching from the first uplink transmission waveform to the second uplink transmission waveform.

[0121] In one embodiment, the method further includes: performing value processing on the TPMI based on a lower limit value of a specified range, so as to determine a precoding matrix to be used based on a result of the value processing.

[0122] Specifically, taking CP-OFDM with 1-stream DMRS-type=1 as an example, when it is detected that TPMI in DCI is a reserved parameter n (6<=n<=7), where 6 is the lower limit value and 7 is the upper limit value, waveform switching is turned on. At this time, TPMI is valued at the lower limit value of the specified range, that is, TPMI should be selected as n-6.

[0123] In one embodiment, when it is detected that the DCI carries a waveform switching indication, switching the uplink transmission waveform based on the waveform switching indication includes:

[0124] If it is detected that the value of the TPMI field is greater than a defined threshold, it is determined to carry a waveform switching indication, and the second uplink transmission waveform is switched to the first uplink transmission waveform.

[0125] The limited threshold is a threshold pre-agreed between the base station and the terminal.

[0126] like Figure 5 As shown, taking the waveform switching indication configuration based on the specified field in TPMI as an example, a transmission waveform switching indication method according to another embodiment of the present disclosure includes:

[0127] Step S502: reporting information on the dynamic waveform switching capability to the base station.

[0128] Step S504: receiving downlink control information DCI.

[0129] Step S506: When it is detected that the MCS field in the DCI includes the first set of reserved values, it is determined to carry a waveform switching indication, and the first uplink transmission waveform is switched to the second uplink transmission waveform.

[0130] Step S508: When it is detected that the MCS field in the DCI includes a second set of reserved values, a corresponding MCS index is determined based on the second set of reserved values.

[0131] Step S510: determining the MCS for scheduling the PUSCH based on the corresponding MCS index.

[0132] Step S512: Transmit data using a second uplink transmission waveform based on the MCS for scheduling the PUSCH.

[0133] Step S514: after switching to the second uplink transmission waveform, it is detected that the MCS index in the DCI received again is greater than the index threshold, and the second uplink transmission waveform is switched to the first uplink transmission waveform.

[0134] like Figure 6 As shown, taking the waveform switching indication configuration based on the specified field in the MCS as an example, a switching indication method for a transmission waveform according to another embodiment of the present disclosure includes:

[0135] Step S602: currently using the CP-OFDM waveform, detecting that the channel state is not good, and configuring the reserved value of the specified field in the downlink control information DCI as a waveform switching indication.

[0136] Step S604: the base station sends a DCI carrying a waveform switching indication to the terminal.

[0137] Step S606: The terminal detects the value of MCS in the DCI for performing a handover indication.

[0138] Step S608, check whether the first three digits are "111", if "yes", go to step S610, if "no", go to step S614.

[0139] Step S610, using a DFT-s-OFDM waveform, the last two digits of the MCS field are used as the MCS level.

[0140] Step S612, check whether the MCS value carried by the received DCI exceeds the index threshold, if "yes", go to step S614, if "no", go to step S610.

[0141] Step S614: using CP-OFDM waveform.

[0142] It should be noted that the above figures are only schematic illustrations of the processes included in the method according to an exemplary embodiment of the present invention, and are not intended to be limiting. It is easy to understand that the processes shown in the above figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0143] Refer to the following Figure 7 The transmission waveform switching indication device 700 according to the embodiment of the present invention is described. Figure 7 The switching indication device 700 of the transmission waveform shown is only an example and should not bring any limitation to the function and scope of use of the embodiment of the present invention.

[0144] The switching indication device 700 of the transmission waveform is expressed in the form of a hardware module. The components of the switching indication device 700 of the transmission waveform may include but are not limited to: a configuration module 702, which is used to configure the reserved value of the specified field in the downlink control information DCI as a waveform switching indication, the waveform switching indication is used to instruct the terminal to switch the uplink transmission waveform, and the specified field is a field with a reserved value in the DCI; a sending module 704, which is used to send the DCI carrying the waveform switching indication to the terminal.

[0145] Refer to the following Figure 8 The switching indication device 800 of the transmission waveform according to the embodiment of the present invention is described. Figure 8The switching indication device 800 of the transmission waveform shown is only an example and should not bring any limitation to the function and scope of use of the embodiment of the present invention.

[0146] The switching indication device 800 of the transmission waveform is presented in the form of a hardware module. The components of the switching indication device 800 of the transmission waveform may include but are not limited to: a receiving module 802 for receiving downlink control information DCI; a switching module 804 for switching the uplink transmission waveform in the next time slot based on the waveform switching indication when detecting that the DCI carries a waveform switching indication.

[0147] It will be appreciated by those skilled in the art that various aspects of the present invention may be implemented as a system, method or program product. Therefore, various aspects of the present invention may be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software, which may be collectively referred to herein as a "circuit", "module" or "system".

[0148] Refer to the following Fig. 9 The electronic device 900 according to this embodiment of the present invention is described below. It can be a network device or a terminal. Fig. 9 The electronic device 900 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0149] like Fig. 9 As shown, the electronic device 900 is in the form of a general computing device. The components of the electronic device 900 may include but are not limited to: at least one processing unit 910, at least one storage unit 920, and a bus 930 connecting different system components (including the storage unit 920 and the processing unit 910).

[0150] The storage unit stores program codes, which can be executed by the processing unit 910, so that the processing unit 910 performs the steps according to various exemplary embodiments of the present invention described in the above “Exemplary Method” section of this specification. For example, the processing unit 910 can perform the following steps: Figure 2 The scheme described in steps S202 to S204 shown in FIG.

[0151] The storage unit 920 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 9201 and / or a cache storage unit 9202 , and may further include a read-only storage unit (ROM) 9203 .

[0152] The storage unit 920 may also include a program / utility 9204 having a set (at least one) of program modules 9205, such program modules 9205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0153] Bus 930 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0154] The electronic device 900 may also communicate with one or more external devices 970 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 900, and / or communicate with any device that enables the electronic device 900 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 950. Furthermore, the electronic device 900 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 960. As shown, the network adapter 960 communicates with other modules of the electronic device 900 via a bus 930. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 900, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0155] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0156] In an exemplary embodiment of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above method of the present specification is stored. In some possible implementations, various aspects of the present invention may also be implemented in the form of a program product, which includes a program code, and when the program product is run on an electronic device, the program code is used to enable the electronic device to perform the steps according to various exemplary implementations of the present invention described in the above "Exemplary Method" section of the present specification.

[0157] The program product for implementing the above method according to an embodiment of the present invention may adopt a portable compact disk read-only memory (CD-ROM) and include program code, and may be run on an electronic device, such as a personal computer. However, the program product of the present invention is not limited thereto, and in this document, a readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, apparatus, or device.

[0158] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0159] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0160] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0161] Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0162] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.

[0163] In addition, although the steps of the method in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps, etc.

[0164] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0165] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A method for indicating switching of a transmission waveform, characterized in that: Applied to base stations, including: Configuring a reserved value of a specified field in downlink control information DCI as a waveform switching indication, wherein the waveform switching indication is used to instruct the terminal to switch an uplink transmission waveform, and the specified field is a field in the DCI having the reserved value; The DCI carrying the waveform switching indication is sent to the terminal.

2. The method for indicating the switching of a transmission waveform according to claim 1, characterized in that: The configuring the reserved value of the designated field in the downlink control information DCI as the waveform switching indication includes: The reserved value of the designated field in the DCI is configured as the waveform switching indication based on the channel status.

3. The method for indicating the switching of a transmission waveform according to claim 1, characterized in that: The waveform switching indication is used to instruct the terminal to switch the uplink transmission waveform, including: The waveform switching indication is used to instruct the terminal to switch from a first uplink transmission waveform to a second uplink transmission waveform.

4. The method for indicating the switching of a transmission waveform according to claim 3, characterized in that: The format of the DCI used to configure the waveform switching indication is a DCI format for scheduling an uplink physical shared channel PUSCH.

5. The switching indication method of the transmission waveform according to claim 4, characterized in that: The designated field includes a field indicating a modulation and coding strategy MCS in the DCI.

6. The method for indicating the switching of a transmission waveform according to claim 5, characterized in that: The configuring the reserved value of the designated field in the downlink control information DCI as the waveform switching indication includes: Determine a binary representation corresponding to the reserved value in the MCS; Splitting the binary representation into at least two groups of reserved values, the at least two groups of reserved values ​​comprising a first group of reserved values ​​and a second group of reserved values ​​having different values, the first group of reserved values ​​being configured to instruct the terminal to switch from the first uplink transmission waveform to the second uplink transmission waveform, and the second group of reserved values ​​being used to configure an MCS index matching the second uplink transmission waveform; The waveform switching indication is generated based on the at least two sets of retained values.

7. The method for indicating the switching of a transmission waveform according to claim 6, characterized in that: After sending the DCI carrying the waveform switching indication to the terminal, the method further includes: The MCS index greater than or equal to the index threshold is configured as a switchback indication, where the switchback indication is used to indicate switching from the second uplink transmission waveform to the first uplink transmission waveform.

8. The method for indicating the switching of a transmission waveform according to claim 6, characterized in that: Also includes: It is detected that the level of the MCS configured by the second set of reserved values ​​initially selected does not meet the communication requirements, the second set of reserved values ​​is reselected to adjust the MCS index, and the adjusted DCI is resent.

9. The method for indicating the switching of a transmission waveform according to claim 4, characterized in that: The designated field includes a transmission precoding matrix indication TPMI field in the DCI.

10. The method for indicating the switching of a transmission waveform according to claim 9, characterized in that: The configuring the reserved value of the designated field in the downlink control information DCI as the waveform switching indication includes: The reserved value in the TPMI field that is within a specified range is selected to generate the waveform switching indication.

11. The method for indicating the switching of a transmission waveform according to claim 10, characterized in that: After sending the DCI carrying the waveform switching indication to the terminal, the method further includes: The value of the TPMI field is configured to be greater than a defined threshold value, so as to generate a switchback indication based on the configuration result, wherein the switchback indication is used to indicate switching from the second uplink transmission waveform to the first uplink transmission waveform, The limited threshold is a threshold pre-agreed between the base station and the terminal.

12. The method for indicating the switching of a transmission waveform according to any one of claims 1 to 11, characterized in that: Before sending the downlink control information DCI, the method further includes: Receive information reported by the terminal about the dynamic waveform switching capability.

13. The method for indicating the switching of a transmission waveform according to claim 3, characterized in that: The first uplink transmission waveform is CP-OFDM, and the second uplink transmission waveform is DFT-S-OFDM.

14. A method for indicating switching of a transmission waveform, characterized in that: Applied to terminals, including: Receiving downlink control information DCI; When it is detected that the DCI carries a waveform switching indication, the uplink transmission waveform is switched in the next time slot based on the waveform switching indication.

15. The method for indicating the switching of a transmission waveform according to claim 14, characterized in that: The step of switching the uplink transmission waveform in the next time slot based on the waveform switching indication includes: The first uplink transmission waveform is switched to the second uplink transmission waveform in the next time slot based on the waveform switching indication.

16. The method for indicating the switching of a transmission waveform according to claim 15, characterized in that: The step of switching the first uplink transmission waveform to the second uplink transmission waveform in the next time slot based on the waveform switching indication includes: When it is detected that the MCS field in the DCI includes the first group of reserved values, it is determined to carry the waveform switching indication, and the first uplink transmission waveform is switched to the second uplink transmission waveform.

17. The method for indicating the switching of a transmission waveform according to claim 16, characterized in that: Also includes: When detecting that the MCS field in the DCI includes a second set of reserved values, determining a corresponding MCS index based on the second set of reserved values; Determine the MCS for scheduling the PUSCH based on the corresponding MCS index; The second uplink transmission waveform is used to transmit data based on the MCS of the scheduled PUSCH.

18. The method for indicating the switching of a transmission waveform according to claim 17, characterized in that: Also includes: After switching to the second uplink transmission waveform, it is detected that the MCS index in the DCI received again is greater than an index threshold, and the second uplink transmission waveform is switched to the first uplink transmission waveform.

19. The method for indicating the switching of a transmission waveform according to claim 15, characterized in that: When detecting that the DCI carries a waveform switching indication, switching the uplink transmission waveform based on the waveform switching indication includes: If a reserved value within a specified range is detected in the TPMI field of the DCI, it is determined to carry the waveform switching indication, and the first uplink transmission waveform is switched to the second uplink transmission waveform.

20. The method for indicating the switching of a transmission waveform according to claim 19, characterized in that: Also includes: The TPMI is subjected to value processing based on the lower limit value of the specified range, so as to determine the precoding matrix to be used based on the value processing result.

21. The method for indicating the switching of a transmission waveform according to claim 18, characterized in that: When detecting that the DCI carries a waveform switching indication, switching the uplink transmission waveform based on the waveform switching indication includes: If it is detected that the value of the TPMI field is greater than a defined threshold, it is determined to carry the waveform switching indication, and the second uplink transmission waveform is switched to the first uplink transmission waveform, The limited threshold is a threshold pre-agreed between the base station and the terminal.

22. The method for indicating the switching of a transmission waveform according to any one of claims 14 to 21, characterized in that: Before receiving the downlink control information DCI, the method further includes: Report information with dynamic waveform switching capability to the base station.

23. The method for indicating the switching of a transmission waveform according to claim 15, characterized in that: The first uplink transmission waveform is CP-OFDM, and the second uplink transmission waveform is DFT-S-OFDM.

24. A switching indication device for a transmission waveform, characterized in that: include: A configuration module, configured to configure a reserved value of a specified field in downlink control information DCI as a waveform switching indication, wherein the waveform switching indication is used to instruct the terminal to switch an uplink transmission waveform, and the specified field is a field in the DCI having the reserved value; A sending module is used to send the DCI carrying the waveform switching indication to the terminal.

25. A switching indication device for a transmission waveform, characterized in that: Applied to terminals, including: A receiving module, used for receiving downlink control information DCI; The switching module is used to switch the uplink transmission waveform in the next time slot based on the waveform switching indication when detecting that the DCI carries the waveform switching indication.

26. A network device, characterized in that: include: processor; as well as A memory, configured to store executable instructions of the processor; The processor is configured to execute the transmission waveform switching indication method according to any one of claims 1 to 13 by executing the executable instructions.

27. A terminal, characterized in that: include: processor; as well as A memory, configured to store executable instructions of the processor; The processor is configured to execute the transmission waveform switching indication method according to any one of claims 14 to 23 by executing the executable instructions.

28. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for indicating switching of a transmission waveform according to any one of claims 1 to 23 is implemented.

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