Waveform switching method and terminal, network equipment, system and storage medium

Abstract

The invention provides a waveform switching method, a terminal, network equipment, a system and a storage medium, and the method comprises the steps: receiving switching indication information sent by the network equipment; wherein the switching indication information is used for switching a waveform adopted by the first downlink channel; determining a first waveform based on the switching indication information; wherein the first waveform is a waveform adopted by the first downlink channel after waveform switching. According to the invention, the feasibility of coexistence of multiple waveforms in downlink transmission is improved, and the feasibility and reliability of dynamic switching of downlink channel waveforms are improved.

Description

Waveform switching methods and terminals, network devices, systems and storage media Technical Field

[0001] This disclosure relates to the field of communications, and in particular to waveform switching methods and terminals, network devices, systems and storage media. Background Technology

[0002] Currently, downlink transmission can support one waveform, while uplink transmission can support two waveforms.

[0003] Summary of the Invention

[0004] To improve the feasibility of multiple waveforms coexisting in downlink transmission, embodiments of this disclosure provide a waveform switching method, a terminal, a network device, a system, and a storage medium.

[0005] According to a first aspect of the present disclosure, a waveform switching method is provided, comprising:

[0006] Receive handover indication information sent by a network device; wherein the handover indication information is used to switch the waveform used by the first downlink channel;

[0007] Based on the switching indication information, a first waveform is determined; wherein, the first waveform is the waveform adopted by the first downlink channel after waveform switching.

[0008] According to a second aspect of the present disclosure, a waveform switching method is provided, comprising:

[0009] Send handover indication information to the terminal; wherein, the handover indication information is used to switch the waveform used by the first downlink channel;

[0010] Switch the waveform of the first downlink channel to the first waveform.

[0011] According to a third aspect of the present disclosure, a terminal is provided, comprising:

[0012] The transceiver module is configured to receive handover indication information sent by the network device; wherein the handover indication information is used to switch the waveform used by the first downlink channel;

[0013] The processing module is configured to determine a first waveform based on the handover indication information; wherein the first waveform is the waveform used by the first downlink channel after waveform switching.

[0014] According to a fourth aspect of the present disclosure, a network device is provided, comprising:

[0015] The transceiver module is configured to send handover indication information to the terminal; wherein the handover indication information is used to switch the waveform used by the first downlink channel;

[0016] The processing module is configured to switch the waveform of the first downlink channel to the first waveform.

[0017] According to a fifth aspect of the present disclosure, a terminal is provided, comprising:

[0018] One or more processors;

[0019] The processor is used to execute the waveform switching method described in any one of the first aspects.

[0020] According to a sixth aspect of the present disclosure, a network device is provided, comprising:

[0021] One or more processors;

[0022] The processor is used to execute the waveform switching method described in any one of the second aspects.

[0023] According to a seventh aspect of the present disclosure, a communication system is provided, comprising:

[0024] A terminal, the terminal being configured to implement the waveform switching method described in any one of the first aspects;

[0025] A network device configured to implement the waveform switching method described in any one of the second aspects.

[0026] According to an eighth aspect of the present disclosure, a storage medium is provided that stores instructions that, when executed on a communication device, cause the communication device to perform a waveform switching method as described in any one of the first or second aspects.

[0027] According to a ninth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, is used to implement the waveform switching method described in any one of the first or second aspects.

[0028] In this embodiment of the disclosure, when downlink transmission supports multiple waveforms, the terminal can determine the waveform used by the first downlink channel after waveform switching based on the switching indication information sent by the network device. This improves the feasibility of multiple waveforms coexisting in downlink transmission and enhances the feasibility and reliability of dynamically switching downlink channel waveforms.

[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0031] Figure 1A is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure.

[0032] Figure 1B is an exemplary schematic diagram of the relationship between DFT-S-OFDM waveforms and OFDM waveforms provided according to embodiments of the present disclosure.

[0033] Figure 1C is an exemplary schematic diagram of the relationship between OTFS waveform and OFDM waveform provided according to an embodiment of the present disclosure.

[0034] Figure 2 is an exemplary interactive schematic diagram of a waveform switching method provided according to an embodiment of the present disclosure.

[0035] Figure 3A is one of the exemplary flowcharts of a waveform switching method provided according to an embodiment of the present disclosure.

[0036] Figure 3B is a second exemplary flowchart of a waveform switching method provided according to an embodiment of the present disclosure.

[0037] Figure 4A is an exemplary block diagram of a terminal provided according to an embodiment of the present disclosure.

[0038] Figure 4B is an exemplary block diagram of a network device provided according to an embodiment of the present disclosure.

[0039] Figure 5A is an exemplary interactive schematic diagram of a communication device provided according to an embodiment of the present disclosure.

[0040] Figure 5B is an exemplary interactive schematic diagram of a chip provided according to an embodiment of the present disclosure. Detailed Implementation

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0042] This disclosure presents a waveform switching method, as well as a terminal, network device, system, and storage medium.

[0043] In a first aspect, embodiments of this disclosure propose a waveform switching method, comprising: receiving switching indication information sent by a network device; wherein the switching indication information is used to switch the waveform used by a first downlink channel; and determining a first waveform based on the switching indication information; wherein the first waveform is the waveform used by the first downlink channel after waveform switching.

[0044] The above embodiments improve the feasibility of multiple waveforms coexisting in downlink transmission, and also improve the feasibility and reliability of dynamically switching downlink channel waveforms.

[0045] In conjunction with some embodiments of the first aspect, in some embodiments, the first downlink channel includes at least a Physical Downlink Shared Channel (PDSCH).

[0046] In the above embodiments, at least the waveform of PDSCH can be dynamically switched, which improves the feasibility and reliability of dynamically switching downlink channel waveforms.

[0047] In conjunction with some embodiments of the first aspect, in some embodiments, the switching indication information is used to indicate any one of the following: the first waveform; whether the transformation module is enabled.

[0048] In the above embodiments, the switching indication information can be used to indicate any of the above items so that the terminal can determine the first waveform, which is simple to implement and highly usable.

[0049] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first waveform based on the switching indication information includes: determining the first waveform corresponding to the bit value of the first information field in the switching indication information based on the correspondence between bit values ​​and waveforms.

[0050] In the above embodiments, the first waveform can be quickly determined based on the above correspondence, which improves the feasibility and reliability of dynamically switching downlink channel waveforms.

[0051] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first waveform based on the switching indication information includes any one of the following: the bit value of the first information field in the switching indication information is a first value, determining that the first waveform is a waveform obtained after passing through the transformation module; the bit value of the first information field in the switching indication information is a second value, determining that the first waveform is a waveform that has not passed through the transformation module.

[0052] In the above embodiments, the first waveform can be determined quickly, which improves the feasibility and reliability of dynamically switching downlink channel waveforms.

[0053] In conjunction with some embodiments of the first aspect, in some embodiments, the handover indication information is any one of the following: a first downlink control information (DCI), wherein the first DCI is a terminal-specific DCI; or a second DCI, wherein the second DCI is a group-common DCI.

[0054] In the above embodiments, the waveform of the downlink channel can be dynamically switched via DCI, resulting in high availability.

[0055] In conjunction with some embodiments of the first aspect, in some embodiments, the first DCI is scrambled by at least one of the following: Configuring a Scheduled Radio Network Temporary Identifier (CS-RNTI); a Cell Radio Network Temporary Identifier (C-RNTI); or a Modulation and Coding Scheme Cell Radio Network Temporary Identifier (MCS-C-RNTI).

[0056] In the above embodiments, the terminal-specific DCI can be scrambled using any of the above methods to indicate downlink channel waveform switching, thereby improving the feasibility and reliability of dynamically switching downlink channel waveforms.

[0057] In conjunction with some embodiments of the first aspect, in some embodiments, the second DCI is scrambled using the waveform wireless network temporary identifier waveform-RNTI.

[0058] In the above embodiments, the group common DCI can be scrambled by the above RNTI to indicate downlink channel waveform switching, thereby improving the feasibility and reliability of dynamic downlink channel waveform switching.

[0059] In some embodiments, in conjunction with the first aspect, the method further includes: after the second DCI takes effect, determining that the waveform of the first downlink channel is switched to the first waveform.

[0060] In the above embodiments, after the second DCI takes effect, all terminals within the terminal group determine that the waveform of the first downlink channel is switched to the first waveform. This improves the feasibility of multiple waveforms coexisting in downlink transmission and enhances the feasibility and reliability of dynamically switching downlink channel waveforms.

[0061] In conjunction with some embodiments of the first aspect, in some embodiments, the first waveform indicated by the second DCI includes at least one of the following: the waveform used by the first downlink channel in a semi-static configuration on each terminal within the same terminal group after waveform switching; the waveform used by the first downlink channel in a dynamically scheduled manner on each terminal within the same terminal group after waveform switching.

[0062] In the above embodiments, the waveform of at least one downlink channel can be indicated by a second DCI, saving signaling resources and achieving high availability.

[0063] In conjunction with some embodiments of the first aspect, in some embodiments, the first waveform indicated by the switching indication information includes at least one of the following: the waveform used by the dynamically scheduled PDSCH after waveform switching; the waveform used by the semi-statically configured PDSCH after waveform switching; and the waveform used by the PDCCH after waveform switching.

[0064] The above embodiments save signaling resources and have high availability.

[0065] Secondly, embodiments of this disclosure propose a waveform switching method, comprising: sending switching indication information to a terminal; wherein the switching indication information is used to switch the waveform used by a first downlink channel; and switching the waveform of the first downlink channel to the first waveform.

[0066] In conjunction with some embodiments of the second aspect, in some embodiments, the first downlink channel includes at least a Physical Downlink Shared Channel (PDSCH).

[0067] In conjunction with some embodiments of the second aspect, in some embodiments, the switching indication information is used to indicate any one of the following: the first waveform; whether the transformation module is enabled.

[0068] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes: determining a bit value corresponding to the first waveform based on the correspondence between bit values ​​and waveforms; and determining a bit value of the first information field in the switching indication information based on the bit value corresponding to the first waveform.

[0069] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes any one of the following: the first waveform is a waveform obtained after passing through the transformation module, and the bit value of the first information field in the switching indication information is determined to be a first value; the first waveform is a waveform that has not passed through the transformation module, and the bit value of the first information field in the switching indication information is determined to be a second value.

[0070] In conjunction with some embodiments of the second aspect, in some embodiments, the handover indication information is any one of the following: a first downlink control information (DCI), wherein the first DCI is a terminal-specific DCI; or a second DCI, wherein the second DCI is a group-common DCI.

[0071] In conjunction with some embodiments of the second aspect, in some embodiments, the first DCI is scrambled by at least one of the following: Configuring a Scheduled Radio Network Temporary Identifier (CS-RNTI); a Cell Radio Network Temporary Identifier (C-RNTI); or a Modulation and Coding Scheme Cell Radio Network Temporary Identifier (MCS-C-RNTI).

[0072] In conjunction with some embodiments of the second aspect, in some embodiments, the second DCI is scrambled using the waveform wireless network temporary identifier waveform-RNTI.

[0073] In conjunction with some embodiments of the second aspect, in some embodiments, the step of switching the waveform of the first downlink channel to the first waveform includes: after the second DCI takes effect, switching the waveform of the first downlink channel to the first waveform.

[0074] In conjunction with some embodiments of the second aspect, in some embodiments, the first waveform indicated by the second DCI includes at least one of the following: the waveform used by the first downlink channel in a semi-static configuration on each terminal within the same terminal group after waveform switching; the waveform used by the first downlink channel in a dynamically scheduled manner on each terminal within the same terminal group after waveform switching.

[0075] In conjunction with some embodiments of the second aspect, in some embodiments, the first waveform indicated by the switching indication information includes at least one of the following: the waveform used by the dynamically scheduled PDSCH after waveform switching; the waveform used by the semi-statically configured PDSCH after waveform switching; and the waveform used by the PDCCH after waveform switching.

[0076] Thirdly, embodiments of this disclosure provide a terminal, including: a transceiver module configured to receive handover indication information sent by a network device; wherein the handover indication information is used to switch the waveform used by a first downlink channel; and a processing module configured to determine a first waveform based on the handover indication information; wherein the first waveform is the waveform used by the first downlink channel after waveform switching.

[0077] Fourthly, embodiments of this disclosure provide a network device, including: a transceiver module configured to send handover indication information to a terminal; wherein the handover indication information is used to switch the waveform used by a first downlink channel; and a processing module configured to switch the waveform of the first downlink channel to the first waveform.

[0078] Fifthly, embodiments of this disclosure provide a terminal comprising: one or more processors; wherein the processors are configured to execute the waveform switching method described in any one of the first aspects.

[0079] In a sixth aspect, embodiments of this disclosure provide a network device comprising: one or more processors; wherein the processors are configured to perform the waveform switching method described in any one of the second aspects.

[0080] In a seventh aspect, embodiments of this disclosure provide a communication system comprising: a terminal configured to implement the waveform switching method described in any one of the first aspects; and a network device configured to implement the waveform switching method described in any one of the second aspects.

[0081] Eighthly, embodiments of this disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform a waveform switching method as described in any one of the first or second aspects.

[0082] In a ninth aspect, embodiments of this disclosure provide a computer program product, including a computer program that, when executed by a processor, is used to implement the waveform switching method described in any one of the first or second aspects.

[0083] In a tenth aspect, embodiments of this disclosure provide a chip or chip system. The chip or chip system includes processing circuitry configured to perform the method described according to an optional implementation of the first or second aspect above.

[0084] It is understood that the aforementioned terminals, network devices, communication systems, storage media, computer program products, chips, or chip systems are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0085] The present invention is described in this embodiment. In some embodiments, the terms waveform switching method, communication method, scheduling method, etc., can be used interchangeably; the terms waveform switching device, communication device, scheduling device, etc., can be used interchangeably; and the terms communication system, waveform switching system, scheduling system, etc., can be used interchangeably.

[0086] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0087] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0088] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0089] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0090] In the embodiments disclosed herein, "multiple" refers to two or more.

[0091] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0092] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "in response to one case A, in response to another case B", etc., may include the following technical solutions depending on the situation: in some embodiments, A (execute A regardless of B); in some embodiments, B (execute B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). The same applies when there are more branches such as A, B, C, etc.

[0093] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0094] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0095] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0096] In some embodiments, the terms “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc., can be used interchangeably.

[0097] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0098] In some embodiments, devices, etc., can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as “device”, “equipment”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.

[0099] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0100] In some embodiments, the terms "access network device (AN device)," "radio access network device (RAN device)," "base station (BS)," "radio base station," "fixed station," "node," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "antenna panel," "antenna array," "cell," "macro cell," "small cell," "femto cell," "pico cell," "sector," "cell group," "serving cell," "carrier," "component carrier," and "bandwidth part (BWP)" can be used interchangeably.

[0101] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", "subscriber station", "mobile unit", "subscriber unit", "wireless unit", "remote unit", "mobile device", "wireless device", "wireless communication device", "remote device", "mobile subscriber station", "access terminal", "mobile terminal", "wireless terminal", "remote terminal", "handset", "user agent", "mobile client", and "client" can be used interchangeably.

[0102] In some embodiments, access network devices, core network devices, or network devices can be replaced by terminals. For example, embodiments of this disclosure can also be applied to structures where communication between access network devices, core network devices, or network devices and terminals is replaced by communication between multiple terminals (e.g., device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the structure can also be configured such that the terminal has all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can be replaced with sidelink channel, and uplink link, downlink, etc., can be replaced with sidelink link.

[0103] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, core network device, or network device may also be configured to have all or some of the functions of the terminal.

[0104] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0105] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0106] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0107] Figure 1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0108] As shown in Figure 1A, the communication system 100 includes a terminal 101 and a network device 102.

[0109] In some embodiments, terminal 101 includes, but is not limited to, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home.

[0110] In some embodiments, network device 102 includes, but is not limited to, at least one of access network device and core network device.

[0111] In some embodiments, the access network device is, for example, a node or device that connects a terminal to a wireless network. The access network device may include, but is not limited to, at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation eNB (ng-eNB), next-generation Node B (gNB), node B (NB), home node B (HNB), home evolved node B (HeNB), radio backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a Wi-Fi system.

[0112] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within access network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0113] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the access network device. Some of the protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0114] In some embodiments, the core network equipment may be a single device comprising multiple network elements, or it may be multiple devices or a group of devices, each comprising all or part of the multiple network elements. Network elements may be virtual or physical. The core network may include, for example, at least one of the Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).

[0115] In some embodiments, the Downlink (DL) Peak to Average Power Ratio (PAPR) was proposed in Release-18 (Rel-18) Non-Terrestrial Network (NTN). However, due to the significant changes to the standard caused by the waveform modification, the DL waveform enhancement was not standardized.

[0116] Currently, downlink transmission supports one waveform: Orthogonal Frequency Division Multiplexing (OFDM), also known as Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM). Uplink transmission supports two waveforms: OFDM and Discrete Fourier Transform-Spread Spectrum-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). The Discrete Fourier Transform (DFT) precoding module in the uplink signal transmitter can be enabled or disabled. When enabled, the waveform is DFT-S-OFDM; when disabled, the waveform can be OFDM.

[0117] In related technologies, OFDM technology is used. After different subcarrier signals undergo Inverse Fast Fourier Transform (IFFT) operations, they have relatively high peak values. Compared with single-carrier systems, multi-carrier systems have a much higher PAPR. Therefore, the PAPR of DFT-S-OFDM (i.e., single-carrier OFDM) is lower than that of CP-OFDM.

[0118] For the selection of downlink waveforms, OFDM waveforms have a higher PAPR.

[0119] There are many alternative waveform technologies for 6G, such as the Orthogonal Time Frequency Space (OTFS) waveform proposed in Terrestrial Networks (TN) and the DFT-S-OFDM waveform proposed in NTN. Among them, the DFT-S-OFDM signal outperforms the OFDM waveform in terms of error vector magnitude (EVM) and block error rate (BLER).

[0120] In multi-beam design schemes, due to the superposition effect between beams, the performance of DFT-S-OFDM waveforms gradually approaches that of OFDM waveforms. In practical design, it is necessary to comprehensively consider the advantages and disadvantages of both OFDM and DFT-S-OFDM waveforms based on the load design scheme.

[0121] In some embodiments, the DFT-S-OFDM waveform uses an encoding module, as shown in Figure 1B, which sequentially passes through an encoding module, a subcarrier mapping module, an IFFT module, and a cyclic prefix insertion module to obtain the DFT-S-OFDM waveform. The DFT-S-OFDM waveform does not exist in the downlink but can exist in the uplink.

[0122] In some embodiments, the OTFS waveform can be viewed as a traditional OFDM system with the addition of a pre-processing module and a post-processing module, as shown in Figure 1C. The pre-processing module can be the Inverse Symmetric Finite Fourier Transform (ISFFT), and the post-processing module can be the Symmetric Finite Fourier Transform (SFFT).

[0123] In some embodiments, uplink transmission can support two waveforms, which can be summarized as follows for uplink channel and / or signal:

[0124] Among them, the uplink data channel (Physical Uplink Shared Channel, PUSCH) can be configured to have DFT coding, i.e., DFT-S-OFDM waveform.

[0125] Among them, uplink control channel formats 0, 1, and 2 correspond to OFDM waveforms, while formats 3 and 4 correspond to DFT-S-OFDM waveforms. The Random Access Channel (RACH) does not perform DFT because RACH is essentially a sequence.

[0126] Among them, the corresponding upward reference signal is:

[0127] The demodulation reference signal (DMRS) following the PUSCH: It does not go through an encoding module, but the data part will have different sequence generation methods depending on the waveform.

[0128] PUCCH DMRS, which follows the Physical Uplink Control Channel (PUCCH), does not go through an encoding module, but the data part will have different sequence generation methods depending on the waveform.

[0129] Phase-tracking reference signals (PTRS) are based on a separate Radio Resource Control (RRC) configuration: no DFT is performed, but different sequence generation methods are used depending on the different RRC configurations.

[0130] The Sounding Reference Signal (SRS) only supports OFDM waveforms.

[0131] In this embodiment of the disclosure, dynamic uplink waveform indication function can be supported. A new 1-bit field can be added, with bit "0" indicating one waveform and bit "1" indicating another waveform.

[0132] To improve the feasibility of multiple waveforms coexisting in downlink transmission, this disclosure provides the following waveform switching method, terminal, network device, system, and storage medium.

[0133] Figure 2 is an interactive schematic diagram of a waveform switching method according to an embodiment of the present disclosure. As shown in Figure 2, the embodiments of the present disclosure relate to a waveform switching method, which includes:

[0134] In step S2101, network device 102 sends a handover instruction to terminal 101.

[0135] In some embodiments, downlink transmission can support multiple waveforms, including but not limited to OFDM waveforms, DFT-S-OFDM waveforms, etc.

[0136] In some embodiments, the network device 102 can dynamically switch the waveform of the first downlink channel through switching indication information, that is, the switching indication information can be used to switch the waveform adopted by the first downlink channel.

[0137] In some embodiments, terminal 101 receives handover instruction information.

[0138] In some embodiments, the name of the switching indication information is not limited and can be interchanged with the first information, waveform switching signaling, etc.

[0139] In some embodiments, the first downlink channel may include at least a Physical Downlink Shared Channel (PDSCH).

[0140] In one example, the first downlink channel may include PDSCH.

[0141] In one example, the first downlink channel may include the PDSCH and the Physical Downlink Control Channel (PDCCH).

[0142] In one example, the first downlink channel may also include other downlink channels, such as the downlink channel sent by the reader to the IoT device in an IoT system, which can carry data and / or commands, etc.

[0143] In some embodiments, considering that the downlink reference signal, such as the Channel State Information Reference Signal (CSI-RS) or Positioning Reference Signal (PRS), is in a sequence format, a single waveform can be used without dynamically switching its waveform.

[0144] Of course, in some embodiments, where the downlink reference signal supports multiple waveforms, its waveform can also be dynamically switched by the network device 102, and this disclosure does not limit this.

[0145] In some embodiments, the handover indication information may be used to indicate a first waveform. The first waveform is the waveform used by the first downlink channel after waveform switching.

[0146] In one example, the switching indication information can occupy 1 bit. A bit value of "0" can be used to indicate waveform #1, and a bit value of "1" can be used to indicate waveform #2.

[0147] In some embodiments, switching indication information can be used to indicate whether the switching module is enabled.

[0148] In one example, the transform module can also be called the transform coding module (or transform precoding module), specifically the Fourier transform module, the Inverse Symmetric Finite Fourier Transform (ISFFT) module, etc.

[0149] For example, assuming the base waveform is an OFDM waveform, if the Fourier transform module is enabled, the OFDM waveform is transformed into a DFT-S-OFDM waveform; if the inverse symmetric Fourier transform module is enabled, the OFDM waveform is transformed into an OTFS waveform.

[0150] In one example, the switching indication information can occupy 1 bit. A bit value of "0" can be used to indicate that the switching module is de-enabled, and a bit value of "1" can be used to indicate that the switching module is enabled.

[0151] In one example, the switching indication information can occupy 2 or more bits. A bit value of "00" can be used to indicate that the transformation module is disabled, a bit value of "01" is used to indicate that the Fourier transform module is enabled, a bit value of "10" is used to indicate that the inverse symmetric Fourier transform module is enabled, and a bit value of "11" can be a reserved value.

[0152] The above is merely an illustrative example, and this disclosure does not limit the specific content of the switching instruction information.

[0153] In some embodiments, the handover indication information may be downlink control information (DCI).

[0154] The handover indication information may also indicate the first waveform adopted by the first downlink channel after waveform switching or whether the transformation module is enabled. Accordingly, network device 102 may determine the bit value of the first information field in the handover indication information, such as DCI, based on the first waveform to be switched.

[0155] The first information field is a newly added information field in DCI, which can be used by terminal 101 to determine the first waveform.

[0156] The name of the first information field is not limited and can be interchanged with waveform indication information field, indication information field, etc.

[0157] In one example, the handover indication information could be the first DCI, which is a terminal-specific DCI.

[0158] For example, the first information field may occupy one or more bits to indicate the first waveform adopted by the first downlink channel after waveform switching or to indicate whether the conversion module is enabled.

[0159] For example, the first information field can occupy 1 bit. If the bit value of the first information field is "0", it indicates that the first waveform is waveform #1. If the bit value of the first information field is "1", it indicates that the first waveform is waveform #2.

[0160] For example, the first information field can occupy 1 bit. If the bit value of the first information field is "0", it can indicate that the first waveform needs to go through the transformation module. If the bit value of the first information field is "1", it can indicate that the first waveform does not need to go through the transformation module.

[0161] Alternatively, the first information field can occupy 2 bits. If the bit value of the first information field is "00", it indicates that the first waveform does not need to go through the transformation module. If the bit value of the first information field is "01", it indicates that the first waveform needs to go through the Fourier transform module. If the bit value of the first information field is "10", it indicates that the first waveform needs to go through the inverse symmetric Fourier transform module. The bit value of the first information field "11" can be a reserved value.

[0162] For example, in order to save signaling resources, if the first waveform needs to pass through the transformation module, the first DCI may include the first information field mentioned above; if the first waveform does not need to pass through the transformation module, the first DCI may not include the first information field mentioned above.

[0163] For example, in order to save signaling resources, the meaning of other information fields in the first DCI can be redefined. For example, one or more specific information fields in the first DCI can be set to special values, such as all 0s or all 1s, to indicate the first waveform or whether the conversion module is enabled.

[0164] For example, the meaning of the original information field #1 in the first DCI can be redefined. When all the bit values ​​of information field #1 are "0", it can indicate waveform #1, and when all the bit values ​​are "1", it can indicate waveform #2.

[0165] For example, the meaning of the original information field #2 in the first DCI can be redefined. When all the bit values ​​of information field #1 are "0", it can indicate to enable (or disable) the conversion module. When all the bit values ​​are "1", it can indicate to enable (or activate) the conversion module.

[0166] Information field #1 and information field #2 may be the same or different information fields, and this disclosure does not limit this.

[0167] In addition, the special values ​​mentioned above can also be other values ​​agreed upon in the agreement, such as "0011", "100", etc. This disclosure does not limit the specific values.

[0168] For example, when the first downlink channel is a semi-persistent scheduling (SPS) downlink channel, the PDCCH carrying the first DCI can be used to activate the first downlink channel of the semi-persistent configuration, wherein the first DCI can be scrambled by the configured scheduling radio network temporary identifier (CS-RNTI).

[0169] For example, when the first downlink channel is a dynamically scheduled downlink channel, the PDCCH carrying the first DCI can be used to schedule the first downlink channel. The first DCI can be scrambled by the Cell-Radio Network Temporary Identifier (C-RNTI) and / or the Modulation Coding Scheme-Cell-Radio Network Temporary Identifier (MCS-C-RNTI).

[0170] In one example, the handover indication information could be a second DCI, which is a common group DCI, meaning the second DCI is the DCI corresponding to the terminal group.

[0171] For example, the first information field may be a newly added information field in the second DCI, used by the terminal 101 to determine the first waveform adopted by the first downlink channel after waveform switching, and the first information field may occupy one or more bits.

[0172] The method for determining the bit value of the first information field in the second DCI, and whether to carry the first information field, has been described in the aforementioned embodiments related to the first DCI, and will not be repeated here.

[0173] Understandably, in order to save signaling resources, the second DCI can indicate whether the transformation module is enabled by whether it carries the first information field. Alternatively, the meaning of other information fields in the second DCI can be redefined, such as setting one or more specific information fields in the second DCI to special values, such as all 0s or all 1s, to indicate the first waveform or whether the transformation module is enabled.

[0174] For example, the second DCI can be scrambled using a waveform-radio network temporary identifier (waveform-RNTI).

[0175] In some embodiments, when the switching indication information is a second DCI, the network device 102 can indicate the waveform used by the first downlink channel in the semi-static configuration of each terminal in the same terminal group after waveform switching through a second DCI, and / or the waveform used by the first downlink channel in the dynamic scheduling of each terminal in the same terminal group after waveform switching, that is, there is no need to use multiple second DCIs to indicate the corresponding waveform for different types of first downlink channels.

[0176] For example, the second DCI is a group common DCI, which can indicate the waveform of the SPS PDSCH and / or the waveform of the dynamic PDSCH on each terminal in the terminal group after waveform switching.

[0177] In some embodiments, the first downlink channel includes PDSCH and PDCCH, and the network device 102 can indicate the waveforms of PDSCH and PDCCH after waveform switching through the same handover indication information.

[0178] In one example, the PDSCH may include the PDSCH scheduled by the first DCI scrambled by C-RNTI and MCS-C-RNTI.

[0179] In one example, PDSCH may include PDSCH scheduled by a first DCI scrambled by C-RNTI and MCS-C-RNTI, and PDSCH scheduled by a first DCI scrambled by CS-RNTI.

[0180] In one example, the PDCCH may include a PDCCH transmitted in the terminal-specific search space.

[0181] In some embodiments, the first DCI or the second DCI can be configured via RRC to indicate whether dynamic downlink waveform switching is supported. If the first DCI or the second DCI supports dynamic downlink waveform switching, the network device 102 can indicate the waveform of the first downlink channel to be switched via the first DCI or the second DCI. In addition, the first DCI or the second DCI can also indicate the first waveform adopted by the first downlink channel after waveform switching or whether the conversion module is enabled.

[0182] The above is merely an illustrative example. Of course, the switching instruction information can also be RRC signaling, Media Access Control-Control Element (MAC CE), etc., and this disclosure does not limit it.

[0183] In some embodiments, step S2101 is an optional execution step. For example, when the waveform of the downlink channel is agreed upon by the protocol, or when the downlink channel waveform is configured in a semi-static manner, step S2101 may not be executed.

[0184] Among them, for at least one downlink channel of PDCCH and Physical Broadcast Channel (PBCH), the corresponding waveform can be agreed upon by the protocol or configured in a semi-static manner.

[0185] In step S2102, terminal 101 determines the first waveform based on the switching indication information.

[0186] In some embodiments, the first waveform is the waveform used by the first downlink channel after waveform switching.

[0187] In some embodiments, terminal 101 may determine the first waveform in, but is not limited to, the following ways:

[0188] Method 1: Determine the first waveform based on the correspondence between bit values ​​and waveforms.

[0189] In one example, the above correspondence can be defined by the protocol, as shown in Table 1.

[0190] Table 1

[0191] Terminal 101 can determine the first waveform corresponding to the bit value of the first information field in the switching indication information based on the above correspondence. The first information field is used to indicate the first waveform or whether the switching module is enabled.

[0192] For example, if the switching indication information is the first DCI, and the bit value of the first information field is "00", then the terminal 101 determines the first waveform as waveform #1 based on Table 1.

[0193] Method 2: Determine the first waveform based on whether the transformation module is enabled.

[0194] In one example, the first information field in the switching indication information is used to indicate whether the conversion module is enabled. If the bit value of the first information field is a first value, then terminal 101 determines that the first waveform is a waveform obtained after passing through the conversion module, for example, terminal 101 determines that the first waveform is a DFT-S-OFDM waveform. If the bit value of the first information field is a second value, then terminal 101 determines that the first waveform is a waveform that has not passed through the conversion module, for example, terminal 101 determines that the first waveform is an OFDM waveform.

[0195] In one example, the first information field in the switching indication information is used to indicate whether the conversion module is enabled. If the first information field is carried, the terminal 101 determines that the first waveform is the waveform obtained after passing through the conversion module. If the switching indication information does not carry the first information field, the terminal 101 determines that the first waveform is the waveform that has not passed through the conversion module.

[0196] Of course, the terminal 101 may also use other methods to determine the first waveform, and this invention does not limit this.

[0197] In step S2103, network device 102 switches the waveform of the first downlink channel to the first waveform.

[0198] In some embodiments, the switching indication information is a first DCI, which is used to activate the semi-statically configured first downlink channel. At this time, the network device 102 switches the waveform of the first downlink channel to the first waveform.

[0199] For example, the switching indication information is the first DCI, which is used to schedule the first downlink channel. At this time, the network device 102 switches the waveform of the first downlink channel to the first waveform.

[0200] For example, if the switching indication information is a second DCI, and the second DCI is active, the network device 102 switches the waveform of the first downlink channel to the first waveform.

[0201] In some embodiments, network device 102 may transmit a first downlink channel using a first waveform. In some embodiments, terminal 101 receives the first downlink channel based on the determined first waveform.

[0202] In some embodiments, the names of information, etc., are not limited to the names described in the embodiments. Terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0203] In some embodiments, the terms “downlink control information (DCI),” “downlink (DL) assignment,” “DL DCI,” “uplink (UL) grant,” and “UL DCI” can be used interchangeably.

[0204] In some embodiments, “get,” “obtain,” “receive,” “transmit,” “bidirectional transmission,” and “send and / or receive” can be used interchangeably and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining through self-processing, or autonomous implementation, among other meanings.

[0205] In some embodiments, terms such as “send,” “transmit,” “report,” “distribute,” “transfer,” “bidirectional transmission,” “send and / or receive” can be used interchangeably.

[0206] The waveform switching method disclosed in this embodiment may include at least one of steps S2101 to S2103. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, step S2103 may be implemented as an independent embodiment, step S2101+S2102 may be implemented as an independent embodiment, step S2102+S2103 may be implemented as an independent embodiment, and steps S2101 to S2103 may be implemented as independent embodiments, but are not limited thereto.

[0207] In some embodiments, step S2101 is optional, and one or more of these steps may be omitted or substituted in different embodiments. For example, if the downlink channel supports one waveform, or if it supports multiple waveforms but does not support dynamic switching, step S2101 may not be performed.

[0208] In some embodiments, step S2102 is optional, and one or more of these steps may be omitted or substituted in different embodiments. For example, if terminal 101 determines the first waveform based on a predefined method, then step S2102 may not be executed.

[0209] In some embodiments, step S2103 is optional, and one or more of these steps may be omitted or substituted in different embodiments. For example, if it is not necessary to switch the waveform of the first downlink channel, then step S2103 may not be performed.

[0210] In some embodiments, steps S2101 to S2103 are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0211] In some embodiments, the execution order of steps S2101 to S2103 is not limited.

[0212] In the above embodiments, when downlink transmission supports multiple waveforms, the terminal can determine the waveform used by the first downlink channel after waveform switching based on the switching indication information sent by the network device. This improves the feasibility of multiple waveforms coexisting in downlink transmission and enhances the feasibility and reliability of dynamically switching downlink channel waveforms.

[0213] Figure 3A is a flowchart illustrating a waveform switching method according to an embodiment of the present disclosure. As shown in Figure 3A, this embodiment of the present disclosure relates to a waveform switching method, which is executed by terminal 101, and includes:

[0214] Step S3101: Obtain switching instruction information.

[0215] In some embodiments, the handover indication information may be used to switch the waveform used by the first downlink channel.

[0216] In some embodiments, terminal 101 may obtain handover indication information from network device 102, but is not limited thereto, and may also receive handover indication information sent by other entities.

[0217] In some embodiments, terminal 101 obtains handover instruction information as defined by the protocol.

[0218] In some embodiments, terminal 101 obtains handover indication information from upper layer(s).

[0219] In some embodiments, the terminal 101 processes the information to obtain a switching instruction.

[0220] In some embodiments, step S3101 is omitted, and the terminal 101 autonomously implements the function indicated by the switching instruction information, or the terminal 101 obtains the switching instruction information based on predefined rules or protocol agreements, or the above function is the default or default.

[0221] In some embodiments, optional implementations of step S3101 can be found in optional implementations of step S2101 in FIG2 and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0222] Step S3102: Determine the first waveform.

[0223] In some embodiments, optional implementations of step S3102 can be found in optional implementations of step S2102 in FIG2 and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0224] In some embodiments, steps S3101 to S3102 are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0225] In some embodiments, the execution order of steps S3101 to S3102 is not limited.

[0226] In the above embodiments, when downlink transmission supports multiple waveforms, the terminal can determine the waveform used by the first downlink channel after waveform switching based on the switching indication information sent by the network device. This improves the feasibility of multiple waveforms coexisting in downlink transmission and enhances the feasibility and reliability of dynamically switching downlink channel waveforms.

[0227] Figure 3B is a flowchart illustrating a waveform switching method according to an embodiment of the present disclosure. As shown in Figure 3B, this embodiment of the present disclosure relates to a waveform switching method, which is executed by network device 102, and includes:

[0228] Step S3201: Send a switching instruction message.

[0229] In some embodiments, the handover indication information may be used to switch the waveform used by the first downlink channel.

[0230] In some embodiments, network device 102 may send handover instruction information to terminal 101.

[0231] In some embodiments, terminal 101 receives handover instruction information.

[0232] In some embodiments, optional implementations of step S3201 can be found in optional implementations of step S2101 in FIG2 and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0233] Step S3202: Switch the waveform of the first downlink channel to the first waveform.

[0234] In some embodiments, optional implementations of step S3202 can be found in optional implementations of step S2103 in FIG2 and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0235] In some embodiments, steps S3201 to S3202 are optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0236] In some embodiments, the execution order of steps S3201 to S3202 is not limited.

[0237] In the above embodiments, when downlink transmission supports multiple waveforms, the network device can send a switching indication message to dynamically switch the waveform of the first downlink channel. This improves the feasibility of multiple waveforms coexisting in downlink transmission and enhances the feasibility and reliability of dynamically switching downlink channel waveforms.

[0238] The above process is further illustrated with examples below.

[0239] In this embodiment of the disclosure, a method for dynamically indicating the waveform of a downlink signal or downlink channel is provided, which enables dynamic switching of the downlink signal or downlink channel waveform when multiple downlink waveforms coexist.

[0240] This disclosure provides a method for dynamically switching downlink waveforms in a wireless communication system.

[0241] The downlink waveform includes at least the PDSCH waveform.

[0242] In one example, for channels or signals whose waveforms cannot be dynamically switched, their waveforms are determined through standard predefined or semi-static configuration.

[0243] Option 1, for SPS PDSCH:

[0244] Option 1-1 indicates in the PDCCH that activates the PDSCH that a field is introduced in the DCI (Terminal Dedicated DCI) to support the dynamic downlink waveform indication function, for example, using bit "0" to indicate one waveform and bit "1" to indicate another waveform.

[0245] In one example, the DCI can be scrambled using CS-RNTI.

[0246] Options 1-2 have their waveform indication method indicated by the group-common DCI.

[0247] In group-common DCI, a field is introduced to support dynamic downlink waveform indication functionality, such as using bit "0" to indicate one waveform and bit "1" to indicate another waveform.

[0248] In one example, all terminals that receive the group-common DCI determine that the waveform of the semi-statically scheduled PDSCH is switched to the waveform indicated by the group-common DCI after the group-common DCI takes effect.

[0249] Option 2, for dynamically scheduled PDSCH:

[0250] Option 2-1 indicates the waveform indication method by scheduling the DCI of the PDSCH, which is UE-specific.

[0251] In DCI, a field is introduced to support dynamic downlink waveform indication functionality, such as using bit "0" to indicate one waveform and bit "1" to indicate another waveform.

[0252] In one example, the DCI is first configured via RRC to determine whether it supports dynamic downlink waveform indication.

[0253] In one example, the DCI is scrambled using at least one of the following RNTIs:

[0254] C-RNTI, MCS-C-RNTI.

[0255] Option 2-2 uses group-common DCI to indicate the waveform. A field is introduced in the DCI to support dynamic downlink waveform indication, for example, using bit "0" to indicate one waveform and bit "1" to indicate another.

[0256] In one example, the group-common DCI is scrambled using waveform-RNTI.

[0257] In one example, all terminals receiving this DCI determine that the waveform of the PDSCH dynamically scheduled by the DCI is switched to the waveform indicated by the group-common DCI after the DCI takes effect.

[0258] For options 1-2 and 2-2 above, they can be the same group-common DCI, that is, the group-common DCI can indicate the waveform of PDSCH including semi-persistent PDSCH and dynamic PDSCH.

[0259] In addition, the downlink waveform includes PDSCH and PDCCH, and the downlink waveforms of both PDCCH and PDSCH change after one indication.

[0260] In one example, the PDSCH includes a DCI-scheduled PDSCH with C-RNT and MCS-C-RNTI scrambling.

[0261] In one example, PDSCH includes PDSCH with C-RNT, MCS-C-RNTI scrambled DCI scheduling, and SPS PDSCH.

[0262] In one example, the PDCCH is included in the UE-specific search space.

[0263] In the embodiments disclosed herein, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations in other embodiments.

[0264] This disclosure also provides embodiments of an apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Furthermore, another apparatus is provided that includes units or modules for implementing the steps performed by the network device in any of the above methods.

[0265] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC). The functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0266] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. Furthermore, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), or a Deep Learning Processing Unit (DPU).

[0267] Figure 4A is a schematic diagram of the structure of a terminal proposed in an embodiment of this disclosure. As shown in Figure 4A, the terminal 4100 may include: a transceiver module 4101 and a processing module 4102.

[0268] In some embodiments, the transceiver module 4101 is configured to receive handover indication information sent by a network device; wherein the handover indication information is used to switch the waveform used by the first downlink channel.

[0269] In some embodiments, the processing module 4102 is configured to determine a first waveform based on the switching indication information; wherein the first waveform is the waveform used by the first downlink channel after waveform switching.

[0270] Optionally, the transceiver module 4101 is used to perform at least one of the communication steps (such as step S2101, but not limited thereto) performed by the terminal 4100 in any of the above methods, which will not be described in detail here.

[0271] Optionally, the processing module 4102 is used to execute at least one of the other steps (such as step S2102, but not limited to) executed by the terminal 4100 in any of the above methods, which will not be described in detail here.

[0272] Figure 4B is a schematic diagram of the network device proposed in an embodiment of this disclosure. As shown in Figure 4B, the network device 4200 may include: a transceiver module 4201 and a processing module 4202.

[0273] In some embodiments, the transceiver module 4201 is configured to send handover indication information to the terminal; wherein the handover indication information is used to switch the waveform used by the first downlink channel.

[0274] In some embodiments, the processing module 4202 is configured to switch the waveform of the first downlink channel to the first waveform.

[0275] Optionally, the transceiver module 4201 is used to perform at least one of the sending and / or receiving communication steps (e.g., step S2101, but not limited thereto) performed by the network device 4200 in any of the above methods, which will not be described in detail here.

[0276] Optionally, the processing module 4202 is used to perform at least one of the other steps (such as step S2103, but not limited thereto) performed by the network device 4200 in any of the above methods, which will not be described in detail here.

[0277] In some embodiments, the transmitting module and / or receiving module may be referred to as a transceiver module, which may be separate or integrated. Optionally, the transceiver module may be interchangeable with a transceiver.

[0278] In some embodiments, the processing module may be a single module or may include multiple sub-modules. Optionally, the multiple sub-modules may each perform all or part of the steps required by the processing module. Optionally, the processing module may be interchangeable with a processor.

[0279] Figure 5A is a schematic diagram of the structure of the communication device 5100 proposed in an embodiment of this disclosure. The communication device 5100 can be a terminal (e.g., user equipment, vehicle, IoT device, etc.) or a network device (e.g., access network device, core network device, etc.), or it can be a chip, chip system, or processor that supports the terminal in implementing any of the above methods, or it can be a chip, chip system, or processor that supports the network device in implementing any of the above methods. The communication device 5100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0280] As shown in Figure 5A, the communication device 5100 includes one or more processors 5101. The processor 5101 can be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. Optionally, the communication device 5100 can be used to execute any of the above methods. Optionally, one or more processors 5101 can be used to invoke instructions to cause the communication device 5100 to execute any of the above methods.

[0281] In some embodiments, the communication device 5100 further includes one or more transceivers 5102. When the communication device 5100 includes one or more transceivers 5102, the transceiver 5102 performs at least one of the communication steps such as sending and / or receiving in the above method (e.g., step S2101, but not limited thereto), and the processor 5101 performs at least one of other steps (e.g., step S2102, step S2103, but not limited thereto). In optional embodiments, the transceiver may include a receiver and / or a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc., can be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., can be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., can be used interchangeably.

[0282] In some embodiments, the communication device 5100 further includes one or more memories 5103 for storing data. Optionally, all or part of the memories 5103 may be located outside the communication device 5100. In optional embodiments, the communication device 5100 may include one or more interface circuits 5104. Optionally, the interface circuits 5104 are connected to the memories 5103 and can be used to receive data from the memories 5103 or other devices, and to send data to the memories 5103 or other devices. For example, the interface circuits 5104 can read data stored in the memories 5103 and send the data to the processor 5101.

[0283] The communication device 5100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 5100 described in this disclosure is not limited thereto, and the structure of the communication device 5100 may not be limited by FIG. 5A. The communication device may be a standalone device or a part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0284] Figure 5B is a schematic diagram of the structure of chip 5200 according to an embodiment of this disclosure. For cases where the communication device 5100 can be a chip or a chip system, please refer to the schematic diagram of chip 5200 shown in Figure 5B, but it is not limited thereto.

[0285] Chip 5200 includes one or more processors 5201. Chip 5200 is used to perform any of the methods described above.

[0286] In some embodiments, chip 5200 further includes one or more interface circuits 5202. Optionally, terms such as interface circuit, interface, and transceiver pin can be used interchangeably. In some embodiments, chip 5200 further includes one or more memories 5203 for storing data. Optionally, all or part of the memories 5203 may be located outside of chip 5200. Optionally, interface circuit 5202 is connected to memory 5203, and interface circuit 5202 can be used to receive data from memory 5203 or other devices, and interface circuit 5202 can be used to send data to memory 5203 or other devices. For example, interface circuit 5202 can read data stored in memory 5203 and send the data to processor 5201.

[0287] In some embodiments, the interface circuit 5202 performs at least one of the communication steps such as sending and / or receiving in the above-described method (e.g., step S2101, but not limited thereto). The interface circuit 5202 performing the communication steps such as sending and / or receiving in the above-described method refers, for example, to the interface circuit 5202 performing data interaction between the processor 5201, the chip 5200, the memory 5203, or the transceiver device. In some embodiments, the processor 5201 performs at least one of other steps (e.g., steps S2102, steps S2103, but not limited thereto).

[0288] The modules and / or devices described in the various embodiments, such as virtual devices, physical devices, and chips, can be combined or separated arbitrarily as needed. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0289] This disclosure also proposes a storage medium storing instructions that, when executed on the communication device 5100, cause the communication device 5100 to perform any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but not limited thereto; it may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but not limited thereto; it may also be a temporary storage medium.

[0290] This disclosure also provides a program product that, when executed by the communication device 5100, causes the communication device 5100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0291] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

[0292] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0293] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A waveform switching method, characterized by, The method comprises: receiving switching indication information sent by a network device; wherein the switching indication information is used to switch a waveform used by a first downlink channel; determining a first waveform based on the switching indication information; wherein the first waveform is a waveform used by the first downlink channel after waveform switching.

2. The method of claim 1, wherein, The first downlink channel at least comprises a physical downlink shared channel (PDSCH).

3. The method according to claim 1 or 2, characterized in that, The switching indication information is used to indicate any of the following: The first waveform; Whether to enable a transform module.

4. The method of claim 3, wherein, The determination of the first waveform based on the switching indication information comprises: determining the first waveform corresponding to a bit value of a first information field in the switching indication information based on a correspondence between bit values and waveforms.

5. The method of claim 3, wherein, The determination of the first waveform based on the switching indication information comprises any of the following: When the bit value of the first information field in the switching indication information is a first value, it is determined that the first waveform is a waveform obtained after the transform module; When the bit value of the first information field in the switching indication information is a second value, it is determined that the first waveform is a waveform without the transform module.

6. The method according to any one of claims 1 to 5, characterized in that, The switching indication information is any of the following: A first downlink control information (DCI), wherein the first DCI is a terminal-specific DCI; A second DCI, wherein the second DCI is a group-common DCI.

7. The method of claim 6, wherein, The first DCI is scrambled by at least one of the following: A configured scheduling radio network temporary identifier (CS-RNTI); A cell radio network temporary identifier (C-RNTI); A modulation and coding scheme cell radio network temporary identifier (MCS-C-RNTI).

8. The method of claim 6, wherein, The second DCI is scrambled by a waveform radio network temporary identifier (waveform-RNTI).

9. The method of claim 8, wherein, The method further comprises: After the second DCI takes effect, determining that the waveform of the first downlink channel is switched to the first waveform.

10. The method according to claim 8 or 9, characterized in that, The first waveform indicated by the second DCI comprises at least one of the following: A waveform used by the first downlink channel semi-statically configured on each terminal in a same terminal group after waveform switching; A waveform used by the first downlink channel dynamically scheduled on each terminal in a same terminal group after waveform switching.

11. The method according to any one of claims 1 to 10, characterized in that, The first waveform indicated by the switching indication information comprises at least one of the following: A waveform used by a dynamically scheduled PDSCH after waveform switching; A waveform used by a semi-statically configured PDSCH after waveform switching; A waveform used by a PDCCH after waveform switching.

12. A waveform switching method, characterized by, The method comprises: sending switching indication information to a terminal; wherein the switching indication information is used to switch a waveform used by a first downlink channel; switching the waveform of the first downlink channel to the first waveform.

13. The method of claim 12, wherein, The first downlink channel at least comprises a physical downlink shared channel (PDSCH).

14. The method according to claim 12 or 13, characterized in that, The switching indication information is used to indicate any of the following: The first waveform; Whether to enable a transform module.

15. The method of claim 14, wherein, The method further comprises: determining a bit value corresponding to the first waveform based on a correspondence between bit values and waveforms; determining a bit value of a first information field in the switching indication information based on the bit value corresponding to the first waveform.

16. The method of claim 14, wherein, The method further comprises any of the following: The first waveform is a waveform obtained after the transformation module, and a bit value of a first information field in the switching indication information is determined as a first value. The first waveform is a waveform without passing through the transformation module, and a bit value of the first information field in the switching indication information is determined as a second value.

17. The method according to any one of claims 12-16, characterized in that, The switching indication information is any one of the following: A first downlink control information (DCI), and the first DCI is a terminal-specific DCI; A second DCI, and the second DCI is a group-common DCI.

18. The method of claim 17, wherein, The first DCI is scrambled by at least one of the following: A configured scheduling radio network temporary identifier (CS-RNTI); A cell radio network temporary identifier (C-RNTI); A modulation and coding scheme cell radio network temporary identifier (MCS-C-RNTI).

19. The method of claim 17, wherein, The second DCI is scrambled by a waveform radio network temporary identifier (waveform-RNTI).

20. The method of claim 19, wherein, The switching of the waveform of the first downlink channel to the first waveform includes: Switching the waveform of the first downlink channel to the first waveform after the second DCI takes effect.

21. The method of claim 19 or 20, wherein, The first waveform indicated by the second DCI includes at least one of the following: A waveform adopted by the first downlink channel semi-statically configured on each terminal in a same terminal group after the waveform switching; A waveform adopted by the first downlink channel dynamically scheduled on each terminal in a same terminal group after the waveform switching.

22. The method according to any one of claims 12-21, characterized in that, The first waveform indicated by the switching indication information includes at least one of the following: A waveform adopted by a PDSCH dynamically scheduled after the waveform switching; A waveform adopted by a PDSCH semi-statically configured after the waveform switching; A waveform adopted by a PDCCH after the waveform switching.

23. A terminal, characterized by The method comprises: A transceiver module configured to receive switching indication information sent by a network device, wherein the switching indication information is used to switch a waveform adopted by a first downlink channel; A processing module configured to determine a first waveform based on the switching indication information, wherein the first waveform is a waveform adopted by the first downlink channel after the waveform switching.

24. A network device, comprising: The method comprises: A transceiver module configured to send switching indication information to a terminal, wherein the switching indication information is used to switch a waveform adopted by a first downlink channel; A processing module configured to switch a waveform of the first downlink channel to the first waveform.

25. A terminal, characterized by The method comprises: One or more processors; The processor is configured to execute the waveform switching method in any one of claims 1-11.

26. A network device, comprising: The method comprises: One or more processors; The processor is configured to execute the waveform switching method in any one of claims 12-22.

27. A communication system, characterized by The method comprises: A terminal configured to implement the waveform switching method in any one of claims 1-11; A network device configured to implement the waveform switching method in any one of claims 12-22.

28. A storage medium, the storage medium storing instructions, wherein, When the instructions run on a communication device, the communication device is caused to execute the waveform switching method in any one of claims 1-11 or 12-22.

29. A computer program product comprising a computer program, characterised in that, The computer program is executed by a processor to implement the waveform switching method in any one of claims 1-11 or 12-22.

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