CN116489792A

CN116489792A - Downlink transmission method, terminal and network side equipment

Info

Publication number: CN116489792A
Application number: CN202210033023.7A
Authority: CN
Inventors: 顾一; 潘学明
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2023-07-25
Also published as: WO2023134585A1

Abstract

The application discloses a downlink transmission method, a terminal and network side equipment, which belong to the technical field of communication, and the downlink transmission method in the embodiment of the application comprises the following steps: the terminal receives a control signaling sent by network side equipment; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching; and the terminal receives downlink data from the network side equipment based on the waveform determined by the control signaling, or the terminal does not execute downlink dynamic waveform switching based on the waveform determined by the control signaling.

Description

Downlink transmission method, terminal and network side equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to a downlink transmission method, a terminal and network side equipment.

Background

New mobile communication technologies need to support higher carrier frequency, and frequency bands greater than 52.6GHz will become the focus of the next research. In wireless communication, the maximum output Power of a radio frequency Power Amplifier (PA) decreases with the increase of the frequency of a wireless signal, and the technical improvement direction is to use a signal waveform with a low peak-to-average ratio so as to improve the Power amplification efficiency of the PA and ensure the Power of an output signal.

In the related art, a base station does not support downlink dynamic waveform switching; however, the cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform cannot guarantee Peak-to-Average Power Ratio (PAPR) performance, and the discrete fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) waveform limits the waveform transmission rate, which results in low power utilization and poor transmission performance.

Disclosure of Invention

The embodiment of the application provides a downlink transmission method, a terminal and network side equipment, which can solve the problem of poor transmission performance.

In a first aspect, a downlink transmission method is provided, where the method includes:

the terminal receives a control signaling sent by network side equipment; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching;

and the terminal receives downlink data from the network side equipment based on the waveform determined by the control signaling, or the terminal does not execute downlink dynamic waveform switching based on the waveform determined by the control signaling.

In a second aspect, a downlink transmission method is provided, where the method includes:

the network side equipment sends a control signaling to the terminal; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching;

And the network side equipment performs downlink transmission based on the waveform determined by the control signaling.

In a third aspect, a downlink transmission apparatus is provided, including:

the receiving module is used for receiving the control signaling sent by the network side equipment; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching;

and the first transmission module is used for receiving downlink data from the network side equipment based on the waveform determined by the control signaling, or the terminal does not execute downlink dynamic waveform switching based on the waveform determined by the control signaling.

In a fourth aspect, a downlink transmission apparatus is provided, including:

the sending module is used for sending control signaling to the terminal; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching;

and the second transmission module is used for carrying out downlink transmission based on the waveform determined by the control signaling.

In a fifth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the first aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface; the communication interface is used for receiving control signaling sent by the network side equipment; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching;

the processor is used for receiving downlink data from the network side equipment based on the waveform determined by the control signaling, or the terminal does not execute downlink dynamic waveform switching based on the waveform determined by the control signaling.

In a seventh aspect, a network side device is provided, comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the second aspect.

An eighth aspect provides a network side device, including a processor and a communication interface; the communication interface is used for sending control signaling to the terminal; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching;

the processor is used for carrying out downlink transmission based on the waveform determined by the control signaling.

In a ninth aspect, a downlink transmission system is provided, including: a terminal operable to perform the steps of the method as described in the first aspect, and a network side device operable to perform the steps of the method as described in the second aspect.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect or performs the steps of the method according to the second aspect.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface coupled to the processor, the processor being for running a program or instructions to implement the method according to the first aspect or to implement the method according to the second aspect.

In a twelfth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to implement the steps of the method as described in the first aspect or to implement the steps of the method as described in the second aspect.

In the embodiment of the application, the terminal receives the control signaling sent by the network side equipment, acquires that the network side equipment instructs the terminal to execute downlink dynamic waveform switching based on the control signaling, and then receives downlink transmission of the network side equipment on the waveform determined by the control signaling so as to correctly receive and demodulate, thereby realizing downlink dynamic waveform switching and improving transmission performance.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is one of flow diagrams of a downlink transmission method provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a timing relationship and a scheduling process according to an embodiment of the present disclosure;

FIG. 4 is a diagram illustrating a second timing relationship and a scheduling process according to an embodiment of the present disclosure;

fig. 5 is a second flowchart of a downlink transmission method according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a downlink transmission device according to an embodiment of the present application;

fig. 7 is a second schematic structural diagram of a downlink transmission device according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a terminal provided in an embodiment of the present application;

fig. 10 is a schematic structural diagram of a network side device according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New air interface (NR) system for purposes of example, and is described in terms of NR terminology is used in much of the following description, but the techniques are also applicable to communication systems other than NR system applications, such as generation 6 (6 ^th Generation, 6G) communication system.

Fig. 1 is a schematic diagram of a wireless communication system to which the embodiment of the present application is applicable, and the wireless communication system shown in fig. 1 includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, a WLAN access point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmission and reception point (Transmitting Receiving Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiments of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited.

The downlink transmission method provided by the embodiment of the application is described in detail below by some embodiments and application scenarios thereof with reference to the accompanying drawings.

The embodiment of the application provides a downlink transmission method, which can be applied to a wireless communication system supporting more than two waveforms, wherein a terminal receives control signaling sent by network side equipment, acquires that the network side equipment instructs the terminal to execute downlink dynamic waveform switching based on the control signaling, and then receives downlink transmission of the network side equipment on the waveform determined by the control signaling so as to perform correct receiving and demodulation, thereby realizing downlink dynamic waveform switching and improving transmission performance.

Fig. 2 is one of flow diagrams of a downlink transmission method according to an embodiment of the present application, as shown in fig. 2, the method includes steps 201 to 202; wherein:

step 201, a terminal receives a control signaling sent by a network side device; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching.

Step 202, the terminal receives downlink data from the network side device based on the waveform determined by the control signaling, or the terminal does not execute downlink dynamic waveform switching based on the waveform determined by the control signaling.

It should be noted that the embodiments of the present application may be applied to a wireless communication system supporting more than two waveforms. Terminals include, but are not limited to, the types of terminals 11 listed above; network-side devices include, but are not limited to, the types of network-side devices 12 listed above, which are not limiting of the present application. It can be appreciated that the embodiments of the present application may also be used in the context of unlicensed bands.

Optionally, the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching; specifically, the control signaling may include at least one of the following:

a) The downlink dynamic waveform switching enable indication information is used for enabling the downlink dynamic waveform switching.

b) And the downlink dynamic waveform switching indication information is used for indicating that the network side equipment triggers the downlink dynamic waveform switching.

c) And the downlink waveform indication information is used for indicating the downlink transmission waveform of the network side equipment.

In practice, besides the manner of sending the downlink action waveform switching enabling indication information to the terminal by the network side device, at least one of the following manners may be adopted to implement the downlink action waveform switching enabled by the terminal:

mode 1), the terminal receives radio resource control (Radio Resource Control, RRC) signaling sent by the network side device, where the RRC signaling is used to enable downlink dynamic waveform switching; the terminal enables downlink dynamic waveform switching in response to the RRC signaling. For example, the control signaling is downlink control information (Downlink Control Information, DCI).

Mode 2), the terminal is configured to enable downlink dynamic waveform switching by default; that is, each terminal is considered to have the downlink dynamic waveform switching capability by default, and can receive the waveform dynamically switched by the network side device, so that the network side device does not perform any indication.

Mode 3), the terminal reports capability information to the network side device, where the capability information is used to instruct the terminal to support downlink dynamic waveform switching, that is, the terminal may have a capability of receiving dynamic waveform switching. The terminal may enable downlink dynamic waveform switching by default or the terminal may indicate whether the terminal has the capability to receive dynamic waveform switching using RRC signaling.

In this embodiment of the present application, the downlink transmission may include at least one of the following:

(1) A Dynamic Grant (DG) scheduled physical downlink shared channel (Physical Downlink Shared Channel, PDSCH);

(2) Semi-persistent scheduling (Semi-Persistent Scheduling, SPS) -PDSCH transmissions;

(3) RRC configures scheduled PDSCH transmissions;

(4) 4 steps of random access scheduled message 2 (MSG 2) transmission or message 4 (MSG 4) transmission;

(5) 2-step random access scheduled message B (MsgB) PDSCH transmission, paging (paging) PDSCH transmission or PDSCH transmission carrying system information (carrying system information);

(6) Physical downlink control channel (Physical Downlink Control Channel, PDCCH) transmissions.

That is, the control signaling is applicable to at least one of the downlink transmissions (transmissions) of (1) to (6) above.

Alternatively, the waveform determined by the control signaling may include a CP-OFDM waveform or a DFT-S-OFDM waveform.

In the downlink transmission method provided by the embodiment of the application, the terminal receives the control signaling sent by the network side equipment, acquires that the network side equipment instructs the terminal to execute downlink dynamic waveform switching based on the control signaling, and then receives the downlink transmission of the network side equipment on the waveform determined by the control signaling to correctly receive and demodulate, thereby realizing the downlink dynamic waveform switching and improving the transmission performance.

The following describes a specific implementation manner of the control signaling in the embodiment of the present application, where the implementation manner of the control signaling may include any one of the following:

mode 1, a first DCI is used to instruct a specific terminal to perform a downlink dynamic waveform switching.

Mode 2, a second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching; the second DCI is a Group common DCI.

Mode 3, the third DCI is used to instruct a terminal corresponding to at least one PDSCH on at least one cell or carrier to perform downlink waveform switching.

Here, modes 1 to 3 will be described respectively:

for mode 1, the control signaling includes a first DCI for instructing a specific terminal to perform downlink dynamic waveform switching. The implementation manner of the first DCI to dynamically schedule the specific terminal and instruct the specific terminal to perform the downlink dynamic waveform switching may include at least one of the following:

1) And the format type of the first DCI is used for indicating that the network side equipment triggers downlink action waveform switching or downlink transmission waveform of the network side equipment.

2) And the additional new domain in the first DCI is used for indicating the specific terminal to execute downlink dynamic waveform switching.

Specifically, the additional new field in the first DCI may include: a downlink dynamic waveform switching indication field; the downlink dynamic waveform switching indication domain comprises N bits, wherein N is a positive integer;

wherein the N bits are used to indicate at least one of: downlink dynamic waveform switching enable indication information; downlink dynamic waveform switching indication information; the downstream waveform indicates information.

3) And the target domain in the first DCI is used for indicating the specific terminal to execute downlink dynamic waveform switching. Specifically, the target field in the first DCI includes at least one of: downlink dynamic waveform switching enable indication information; downlink dynamic waveform switching indication information; the downstream waveform indicates information.

Optionally, the target field in the first DCI includes at least one of:

a frequency domain resource allocation (frequency domain resource allocation, FDRA) domain;

an antenna port (antenna port) domain;

a modulation and coding strategy (Modulation and Coding Scheme, MCS) field;

a priority indication (priority indicator) field; the priority information indicated by the priority indicator domain is used for indicating the downlink transmission waveform of the network side device.

Specifically, the manner of carrying each indication information in the target domain in the first DCI may include at least one of the following:

a) In the case that the target domain includes an FDRA domain, the FDRA domain includes N1 bits; the N1 bits are used to indicate that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device; and N1 is a positive integer. The N1 bit is at least one bit additionally added in the FDRA domain.

For example, in the case where the terminal has enabled downlink dynamic waveform switching and the resource allocation type configured by the network side device is dynamic switching (dynamic switch), 1bit is additionally added in the existing size of the FDRA domain in the first DCI, and the resource allocation type and the network side device have triggered downlink dynamic waveform switching or the resource allocation type and the downlink transmission waveform of the network side device are jointly indicated by using 2 bits in the FDRA domain (i.e., multiplexing the existing 1 bit+the additionally added 1 bit). See table 1.

TABLE 1

MSB bits(add)	FDRA type	waveform	Waveform change
				00	0	CP	NO
01	0	DFT	YES
				10	1	CP	NO
11	1	DFT	YES

b) In case that the target field includes an FDRA field including N2 bits and an MCS field including N3 bits; the N2 bits and the N3 bits are used for indicating that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device; the N2 bits are used for indicating the resource allocation type, the N3 bits are used for indicating the MCS level information or the MCS table type information, the N2 is a positive integer, and the N3 is an integer. The N2 bits are existing bits in the FDRA domain; the N3 bits are existing bits in the MCS field. Alternatively, the N2 bits may be N2 least significant bits (Least Significant Bit, LSB) or most significant bits (Most Significant Bit, MSB). If N3 is 0, the N2 bits are simultaneously used to indicate that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device.

For example, in the case where the terminal has enabled downlink dynamic waveform switching and the resource allocation type configured by the network side device is dynamic switching (dynamic switch), in the existing size of the FDRA domain, the existing 1bit MSB for indicating the resource allocation type is multiplexed, the 1bit MSB in the FDRA domain is used to simultaneously indicate the resource allocation type and the network side device has triggered the downlink dynamic waveform switching, or to simultaneously indicate the resource allocation type and the downlink transmission waveform of the network side device. Or, jointly indicating that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device by using the N2 bits included in the FDRA domain and the N3 bits included in the MCS domain. See table 2.

TABLE 2

c) In the case that the target domain includes an antanna port domain, the antanna port domain includes N4 bits and/or N5 bits; the N4 bits are used to indicate that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device; the N5 bits are used for indicating antenna port configuration information corresponding to the DFT-S-OFDM waveform; and N4 and N5 are positive integers.

For example, in the case that the terminal has enabled downlink action waveform switching, a column is added to the table in the Antenna port field, and the newly added column is used to indicate that the network side device has triggered downlink action waveform switching or downlink transmission waveform of the network side device. Or, use the reserved bit in the anticonna port to indicate that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device.

Optionally, an antenna port configuration table for DFT use is added in the antenna port field, where the antenna port configuration table is used to indicate antenna port configuration information corresponding to the DFT-S-OFDM waveform.

d) And in the case that the target domain comprises an anticonva port domain, the rank information indicated by the anticenna port domain is used for indicating the downlink transmission waveform of the network side equipment.

Alternatively, only rank information is used for indication in case the terminal has enabled downlink dynamic waveform switching. For example, a threshold value N is preset, and if rank < = N, the downlink transmission waveform of the implicit indication network side device is considered as a DFT waveform; and if the rank is greater than N, assuming that the downlink transmission waveform of the implicit indication network side equipment is a CP waveform.

e) And when the target domain comprises an anticonva port domain and an MCS domain, the rank information indicated by the anticenna port domain and the MCS level information or the MCS table type information indicated by the MCS domain are used for indicating that the network side equipment has triggered downlink waveform switching or downlink transmission waveform of the network side equipment.

Optionally, in case the terminal enables downlink dynamic waveform switching, joint indication is performed based on the MCS domain and the rank domain.

f) And if the target domain comprises an MCS domain, MCS level information or MCS table type information indicated by the MCS domain is used for indicating the downlink transmission waveform of the network side equipment. Optionally, the MCS table type information is carried in the MCS field with extended bits or in the MCS field with M bits LSB or MSB.

Optionally, the terminal may determine a downlink transmission waveform of the network side device according to MCS level information indicated by the MCS domain; or, the terminal may determine the downlink transmission waveform of the network side device according to the MCS table type information indicated by the MCS field. The MCS table type includes MCS-table Transform Precoder or MCS-table. For example, expanding a portion of bits in the MCS field, indicating MCS table type information; alternatively, a portion of bits, such as M-bit LSBs or MSBs, are multiplexed in the MCS field for indicating MCS table type information.

For mode 2, the second DCI is used to instruct a group of terminals to perform a downlink dynamic waveform switch; the second DCI is Group common DCI. The second DCI may be capable of indicating both dynamically scheduled downlink transmissions and semi-static downlink transmissions. Optionally, the second DCI is to: informing one or a group of terminal network side devices that a downlink dynamic waveform switch was triggered.

The implementation manner of the second DCI instructing a group of terminals to perform downlink dynamic waveform switching includes at least one of the following:

1) And the scrambling parameter of the second DCI is used for indicating a group of terminals to execute downlink dynamic waveform switching.

For example, a group DCI for waveform indication is defined or added, and is scrambled by a specific RNTI, for example, a waveform RNTI (WF-RNTI), through which a plurality of terminals confirm that the network side device has triggered a downlink waveform switching or a downlink transmission waveform of the network side device.

Optionally, the second DCI multiplexes an existing group DCI instruction, and a new function is added to the existing group DCI format, where the new function is used to instruct the terminal to perform downlink waveform switching. For example, for format 2-0, a higher layer signaling parameter (e.g., waveformaswitching) is configured, and once the parameter is enabled, waveformswitching indicator 1,waveformswitching indicator 2 is set, etc., these waveformswitching indicator and waveformswitching indicator, etc. are used to indicate that the network side device has triggered a downlink action waveform switch or a downlink transmission waveform of the network side device.

2) And the additional new field in the second DCI is used for indicating a group of terminals to execute downlink dynamic waveform switching. Specifically, the additional new field in the second DCI includes at least one of: downlink dynamic waveform switching enable indication information; downlink dynamic waveform switching indication information; the downstream waveform indicates information.

Optionally, the second DCI multiplexes an existing group DCI instruction, and appends a new field to the existing group DCI format, where the appended new field is used to instruct the terminal to perform downlink waveform switching. For example, for format 2-0, when the higher layer signaling parameter is configured as availableRB-settotstoaddmodlist enable, a part of bits is added after each indicator, or a part of bits is added after the end of the overall indicator function, so as to form a new indication field, where the new indication field is used to indicate that the network side device has triggered downlink dynamic waveform switching or downlink transmission waveform of the network side device.

3) And the target field in the second DCI is used for indicating a group of terminals to execute downlink dynamic waveform switching. Specifically, the target field in the second DCI includes at least one of: downlink dynamic waveform switching enable indication information; downlink dynamic waveform switching indication information; the downstream waveform indicates information.

Optionally, the second DCI multiplexes an existing group DCI instruction, multiplexes an existing domain on an existing format, and multiplexes a part or all of bits in the existing domain to instruct the terminal to perform downlink waveform switching. For example, for format 2-1, it is considered that each preemption indicator needs to be transmitted using a switched waveform or a certain waveform.

Or, an idle bit in a payload (payload) in the group DCI is used to indicate that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device. When the transmission bit number does not meet the maximum bit number of high-level configuration or the DCI alignment is needed through the bit number in a specific domain corresponding to the DCI monitored in the public search space, zero padding is not performed any more, and waveform switching or waveform indication is performed by using the spare part to be zero padded.

For the downlink transmission of the non-dynamic scheduling, if the network side device performs downlink waveform switching, the network side device can not only instruct through the group DCI, but also instruct the downlink transmission of the non-dynamic scheduling through the control signaling in the following manner to instruct the network side device that the downlink waveform switching or the downlink transmission waveform of the network side device has been triggered.

a) If the network side equipment adopts a waveform different from the non-dynamic transmission and generates substantial transmission in the last previous dynamic scheduling downlink of the non-dynamic downlink transmission during transmission, the network side equipment defaults the downlink transmission from the transmission period, and the network side equipment also transmits the waveform according to the dynamic scheduling, so that the terminal needs to receive the corresponding waveform. Thereby achieving waveform switching or indication of a target waveform.

Optionally, an implementation manner of the terminal to receive the downlink data from the network side device based on the waveform determined by the control signaling may include: when the downlink transmission is not DG scheduled downlink transmission, the terminal receives the control signaling scheduled downlink transmission on the control signaling scheduled transmission resource based on the waveform determined by the control signaling; and the terminal receives the downlink transmission of the non-DG scheduling based on the waveform determined by the control signaling after the transmission resource of the control signaling scheduling. Fig. 3 is one of the timing relationships and the scheduling process diagrams provided in the embodiments of the present application, referring to fig. 3, the network side device indicates that the SPS-PDSCH is subjected to waveform switching by scheduling the PDSCH of one DG; the SPS-PDSCH can refer to the transmission waveform of the previous DG-PDSCH, and when the transmission waveform of the DG-PDSCH is different from the SPS-PDSCH, the terminal refers to the transmission waveform of the DG-PDSCH to modify the waveform so as to realize the downlink dynamic waveform switching.

b) A new DCI is designed, which can make the non-dynamic scheduling PDSCH refer to the coordination information when the DGPDSCH is scheduled. The DCI may still be conventional DCI (e.g., CS-RNTI scrambled DCI). During a transmission period of non-dynamic scheduling, if a new DCI before and closest to a certain configuration scheduling transmission period indicates that switching of a downlink waveform occurs or a target downlink transmission waveform is determined and actual transmission of PDSCH is not performed, downlink transmission from the transmission period may follow the dynamically scheduled waveform, implementing waveform switching or indication of the target waveform.

Optionally, an implementation manner of the terminal to receive the downlink data from the network side device based on the waveform determined by the control signaling may include: in the case that the downlink transmission is a downlink transmission scheduled by a non-DG, the terminal does not receive downlink data from the network side device on a transmission resource scheduled by the control signaling; and the terminal receives the downlink transmission of the non-DG scheduling based on the waveform determined by the control signaling after the transmission resource of the control signaling scheduling. Fig. 4 is a second schematic diagram of a timing relationship and a scheduling procedure provided in the embodiment of the present application, referring to fig. 4, dci is supposed to indicate a configuration to schedule a next DG-PDSCH, but PDSCH transmission cannot be actually scheduled; the SPS-PDSCH may modify its own waveform with reference to the scheduling information of the previous DG-PDSCH. That is, the terminal refers to the scheduling information of the DCI to learn that the network side device modifies the waveform or performs waveform switching, so that the terminal receives the SPS-PDSCH sent by the network side device on the waveform indicated by the DCI.

c) In case the downlink transmission is a non-DG scheduled downlink transmission, the control signaling is either an activation DCI or a retransmission DCI. That is, the indication information of waveform switching is configured in the activation DCI or the retransmission DCI. The DCI can be DCI scrambled by CS-RNTI, and the indication mode is the same as that of common DCI.

d) The dynamic waveform switching indication of the network side device is considered to be not supportable in the PDSCH that is not dynamically scheduled.

For mode 3, the control signaling includes a third DCI for instructing a terminal corresponding to at least one PDSCH on at least one cell or carrier to perform downlink dynamic waveform switching. The third DCI to dynamically schedule a plurality of PDSCH transmissions on one or more cells or carriers; the implementation manner of the third DCI indicating the terminal corresponding to the at least one PDSCH on the at least one cell or carrier to perform downlink dynamic waveform switching may include at least one of the following:

1) The third DCI indicates the terminal corresponding to each PDSCH to perform downlink dynamic waveform switching, respectively. For example, the third DCI may indicate downlink transmission waveforms of each PDSCH in each cell or each carrier, respectively.

2) The third DCI indicates each PDSCH group in the at least one cell or carrier to perform downlink dynamic waveform switching, respectively. For example, the third DCI may indicate downlink transmission waveforms of PDSCH of each PDSCH group in each cell or each carrier, respectively. Alternatively, the PDSCH under each cell is divided into a plurality of subgroups, and the PDSCH of each subgroup is indicated by one bit as to whether to switch waveforms or to indicate downlink transmission waveforms.

3) The third DCI indicates each cell or carrier to perform a downlink dynamic waveform switch, respectively. For example, the third DCI may indicate downlink transmission waveforms of the unified PDSCH in each cell or carrier, respectively.

4) The third DCI indicates each cell group or carrier group of the at least one cell or carrier, respectively, to perform a downlink dynamic waveform switch. For example, the third DCI may indicate downlink transmission waveforms of the unified PDSCH in the cells of each subgroup or the carriers of each subgroup, respectively. Alternatively, the PDSCH under cells/carriers of each subgroup is divided into a plurality of subgroups, and one bit indicates whether to switch waveforms or indicate downlink transmission waveforms.

5) The third DCI collectively instructs all PDSCH to perform downlink dynamic waveform switching. For example, the third DCI may collectively indicate downlink transmission waveforms of all PDSCH.

6) The third DCI indicates each PDSCH subgroup of the at least one PDSCH to perform downlink dynamic waveform switching, respectively. For example, the third DCI may indicate downlink transmission waveforms of the scheduled PDSCH of each subgroup, respectively. Alternatively, all PDSCH transmissions scheduled by DCI are divided into multiple subgroups, with all PDSCH under each subgroup being indicated by one bit as to whether to switch waveforms or as to downlink transmission waveforms.

Optionally, the third DCI is for instructing the PDSCH determined based on the target information to perform downlink dynamic waveform switching. The downlink transmission waveform information indicated by the third DCI scheduling the plurality of PDSCH transmissions may depend on target information for which one or more PDSCH transmissions are applicable. Wherein the target information includes at least one of the following information:

(1) And carrying the distance information of the PDCCH of the third DCI and the PDSCH transmission scheduled by the third DCI.

For example, the downlink transmission waveform information indicated by the third DCI is applicable to the PDSCH nearest to the PDCCH in which the third DCI is located.

(2) And scheduling the sequence information of the resource configuration information of the PDSCH in the third DCI.

For example, four resource configuration information (grant) in the third DCI schedules 4 PDSCH but only one bit indicates waveform switching. The PDSCH scheduled by the first resource configuration information (grant) may be indicated by this one waveform switch bit.

Alternatively, 4 PDSCH are scheduled by 4 resource configuration information (grant) in the third DCI, and 2 bits may indicate whether the first two (first and second of 4) PDSCH waveforms are switched in order, respectively.

Alternatively, in the third DCI, 4 PDSCH is scheduled by 4 resource configuration information (grant), and whether the 4 PDSCH waveforms are switched may be sequentially indicated by 4 bits, respectively.

Or, in the third DCI, 4 PDSCH are scheduled by 4 resource configuration information (grant), and 2 bits may indicate whether the first two PDSCH waveforms and the second two PDSCH waveforms are switched in sequence, respectively.

It should be noted that the resource configuration information (grant) may be at least one of the following resource configuration information: time domain resource allocation; frequency domain resource allocation; MCS configuration; DMRS resource allocation; an antanna port configuration.

(3) Cell Identification (ID) information used by scrambling parameters of a PDCCH carrying the third DCI.

For example, the waveform or waveform switching information in the third DCI is only used to indicate the waveform or waveform switching information of one or more PDSCH scheduled by the DCI in the cell corresponding to the cell ID.

(4) And the cell ID used by the scrambling parameter of the PDCCH carrying the third DCI is primary cell ID or secondary cell ID information.

Alternatively, if the cell ID is the primary cell, the waveform information in the third DCI is only information indicating a base station transmission waveform or a base station handover waveform of all PDSCH of the primary cell; if the cell ID is a secondary cell ID, the waveform or waveform switching information in the third DCI is applicable to the waveform or waveform switching information of one or more PDSCHs scheduled by the DCI in all cells.

Optionally, the solution of the embodiment of the present application may further include any one of the following:

1) And under the condition that the waveform determined by the control signaling is not matched with the resource allocation type of the terminal, the terminal receives downlink data from the network side equipment by using the resource allocation type matched with the waveform determined by the control signaling.

For example, a DFT-S-OFDM waveform is adopted or switched to the network side device, but the type of the resource allocation indicated by the terminal is type0, or the type of the resource allocation indicated by the terminal is dynamic switching, but the DCI is further indicated as type0, and the terminal receives downlink transmission by forcing the use of type 1.

2) And under the condition that the waveform determined by the control signaling is not matched with the resource allocation type of the terminal, the terminal does not expect the network side equipment to simultaneously configure the waveform determined by the control signaling and the resource allocation type.

For example, a DFT-S-OFDM waveform is adopted or switched to the network side device, but the type of resource allocation indicated by the terminal is type0, or the type of resource allocation indicated by the terminal is dynamic switching, but is further indicated by DCI as type0, the occurrence of such scheduled transmission is not expected by the terminal.

3) Under the condition that downlink dynamic waveform switching is enabled, the terminal uses a target resource allocation type to receive downlink data from the network side equipment; the target resource allocation type is a resource allocation type with continuous resources. The target resource allocation type is, for example, type 1.

For example, the network side device configures the terminal in a type 1 manner uniformly at the time of enabling waveform switching transmission.

4) And under the condition that the waveform determined by the control signaling is not matched with the MCS information of the terminal, the terminal does not expect the network side equipment to simultaneously configure the waveform determined by the control signaling and the MCS information. That is, the case that the waveform determined by the terminal unexpected control signaling does not match the MCS information of the terminal occurs.

5) And under the condition that the waveform determined by the control signaling is not matched with the MCS information of the terminal, the terminal receives downlink data from the network side equipment by using the MCS information matched with the waveform determined by the control signaling. For example, the terminal discards a portion of the data and drops the MCS for reception.

Optionally, the implementation manner that the terminal does not perform downlink dynamic waveform switching based on the waveform determined by the control signaling includes at least one of the following:

1) Under the condition that the waveform determined by the control signaling is not matched with the resource allocation type of the terminal, the terminal does not execute downlink waveform switching;

alternatively, when the resource allocation Type is Type 0, if the terminal is required to switch to DFT-s-OFDM, the terminal ignores waveform switching and continues to use CP-OFDM.

For example, if the terminal is required to switch to DFT-S-OFDM for the current PDSCH reception when the resource allocation Type is Type 0, the terminal ignores waveform switching, continues to use CP-OFDM for the current PDSCH, but uses DFT-S-OFDM for the subsequently scheduled PDSCH transmission if the resource allocation Type is Type 1.

2) And the terminal does not execute downlink waveform switching under the condition that the waveform determined by the control signaling is not matched with the MCS information of the terminal. That is, in this case, the terminal ignores the DCI scheduling and does not perform downlink dynamic waveform switching.

Fig. 5 is a second flowchart of a downlink transmission method according to an embodiment of the present application, as shown in fig. 5, the method includes steps 501-502; wherein:

step 501, the network side equipment sends a control signaling to the terminal; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching.

Step 502, the network side device performs downlink transmission based on the waveform determined by the control signaling.

In the downlink transmission method provided by the embodiment of the application, the network side equipment sends the control signaling to the terminal, the terminal knows that the network side equipment instructs the terminal to execute downlink dynamic waveform switching based on the control signaling, and then the terminal receives downlink transmission of the network side equipment on the waveform determined by the control signaling so as to correctly receive and demodulate, thereby realizing downlink dynamic waveform switching and improving transmission performance.

Optionally, the control signaling includes at least one of: a first DCI for instructing a specific terminal to perform downlink dynamic waveform switching; a second DCI for instructing a group of terminals to perform downlink dynamic waveform switching; the second DCI is Group common DCI; and the third DCI is used for indicating the terminal corresponding to the at least one PDSCH on the at least one cell or carrier to execute downlink dynamic waveform switching.

Optionally, the network side device performs downlink transmission based on the waveform determined by the control signaling under the condition that the network side device meets the target requirement; wherein the target requirement includes at least one of:

1) All terminals having the same waveform transmit over the same bandwidth of an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

For example, all users with the same waveform need to transmit at least over the bandwidth of the same OFDM symbol.

2) A waveform is transmitted over the bandwidth of the same OFDM symbol.

For example, only one waveform transmission is supported over the bandwidth of the same OFDM symbol. For example, a CP waveform cannot appear on the transmission bandwidth of the DFT-S-OFDM waveform.

3) The network side device DFT transform may be applied to the entire DFT (e.g., the entire BWP) or separately for each user allocated frequency domain resource.

Optionally, in the case where the waveform determined by the control signaling is a discrete fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) waveform, the generation mode of the DFT-S-OFDM waveform needs to satisfy at least one of the following regardless of whether the generation mode of the downlink DFT-S-OFDM is a generation mode of an overall DFT or a partial DFT:

a) Virtual resource block to physical resource block (VRB to PRB) mapping does not enable interleaving (interleaving);

b) The VRB to PRB mapping enables the inter, and the number of the VRB to PRB mapping does not exceed the precoding granularity;

for example, if the precoding granularity is 4, the mapping of VRBs to PRBs cannot exceed 4 RBs. Alternatively, VRB to PRB does not enable interleave.

c) A rate matching pattern set (rateMatchPatterToAddModList) is not configured; alternatively, configured but not activated, i.e., rate matching indication (Rate matching indicator) is not enabled;

d) Long Term Evolution (LTE) to cell reference signal (Cell Reference Signal, CRS) mapping mode (LTE-CRS-to matching around) is not configured;

e) Under the condition of enabling interleaving and/or enabling rate matching, the frequency domain resources of downlink transmission configured by the network side equipment are not overlapped with interleaving resources and/or rate matching resources;

f) The frequency domain resource allocation number of the downlink transmission configured by the network side equipment comprises the following steps: 2. 3 or 5; or an integer multiple adjacent to 2, 3 or 5;

g) And when the generation mode of the DFT-S-OFDM waveform is the segment DFT generation mode, the resources of the same terminal in the frequency domain resources configured by the network side equipment are continuous.

According to the downlink transmission method provided by the embodiment of the application, the execution main body can be a downlink transmission device. In this embodiment, a downlink transmission device executes a downlink transmission method by using an example, and the downlink transmission device provided in this embodiment of the present application is described.

Fig. 6 is one of schematic structural diagrams of a downlink transmission apparatus provided in the embodiment of the present application, as shown in fig. 6, the downlink transmission apparatus 600 is applied to a terminal, and includes:

a receiving module 601, configured to receive a control signaling sent by a network side device; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching;

a first transmission module 602, configured to receive downlink data from the network side device based on the waveform determined by the control signaling, or the terminal does not perform downlink dynamic waveform switching based on the waveform determined by the control signaling.

In the downlink transmission device provided by the embodiment of the application, the control signaling sent by the network side equipment is received, the network side equipment is informed to instruct the terminal to execute downlink dynamic waveform switching based on the control signaling, and then the downlink transmission of the network side equipment is received on the waveform determined by the control signaling so as to perform correct receiving and demodulation, thereby realizing downlink dynamic waveform switching and improving transmission performance.

Optionally, the control signaling includes at least one of the following:

the downlink dynamic waveform switching enabling indication information is used for enabling the downlink dynamic waveform switching;

the downlink dynamic waveform switching indication information is used for indicating that the network side equipment triggers downlink dynamic waveform switching;

and the downlink waveform indication information is used for indicating the downlink transmission waveform of the network side equipment.

Optionally, the apparatus further comprises at least one of:

the enabling module is used for receiving Radio Resource Control (RRC) signaling sent by the network side equipment, wherein the RRC signaling is used for enabling downlink dynamic waveform switching; enabling a downlink dynamic waveform switching in response to the RRC signaling;

a configuration module configured to enable downlink dynamic waveform switching by default;

and the reporting module is used for reporting capability information to the network side equipment, wherein the capability information is used for indicating the terminal to support downlink dynamic waveform switching.

Optionally, the downlink data corresponds to at least one of the following transmissions:

dynamically granting DG scheduled physical downlink shared channel PDSCH transmissions;

semi-persistent scheduling SPS-PDSCH transmissions;

RRC configures scheduled PDSCH transmissions;

4 step of random access scheduling message 2MSG2 transmission or message 4MSG4 transmission;

2 steps of random access scheduling message B MsgB PDSCH transmission, paging PDSCH transmission or PDSCH transmission carrying system information carrying system information;

physical downlink control channel, PDCCH, transmission.

Optionally, the control signaling includes at least one of:

the first downlink control information DCI is used for indicating the specific terminal to execute downlink dynamic waveform switching;

a second DCI for instructing a group of terminals to perform downlink dynamic waveform switching; the second DCI is Group common DCI;

and the third DCI is used for indicating the terminal corresponding to the at least one PDSCH on the at least one cell or carrier to execute downlink dynamic waveform switching.

Optionally, the format type of the first DCI is used to indicate that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device.

Optionally, an additional new field or a target field in the first DCI is used to instruct a specific terminal to perform downlink waveform switching.

Optionally, the target field in the first DCI includes at least one of:

FDRA domain is allocated to frequency domain resource;

an antenna port domain;

modulation and coding strategy MCS field;

a priority indication priority indicator field; the priority information indicated by the priority indicator domain is used for indicating the downlink transmission waveform of the network side device.

Optionally, the FDRA domain includes N1 bits; the N1 bits are used to indicate that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device; the N1 is a positive integer;

or alternatively, the process may be performed,

the FDRA field comprises N2 bits, and the MCS field comprises N3 bits; the N2 bits and the N3 bits are used for indicating that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device; the N2 bits are used for indicating the resource allocation type, the N3 bits are used for indicating the MCS level information or the MCS table type information, the N2 is a positive integer, and the N3 is an integer.

Optionally, the antanna port field includes N4 bits and/or N5 bits;

the N4 bits are used to indicate that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device;

the N5 bits are used for indicating antenna port configuration information corresponding to a discrete Fourier transform spread orthogonal frequency division multiplexing DFT-S-OFDM waveform; and N4 and N5 are positive integers.

Optionally, the rank information indicated by the antenna port field is used for indicating a downlink transmission waveform of the network side device; or alternatively, the process may be performed,

The rank information indicated by the antenna port field and the MCS level information or the MCS table type information indicated by the MCS field are used for indicating that the network side equipment has triggered downlink waveform switching or downlink transmission waveform of the network side equipment; or alternatively, the process may be performed,

and the MCS level information or the MCS table type information indicated by the MCS domain is used for indicating the downlink transmission waveform of the network side equipment.

Optionally, the MCS table type information is carried in the MCS field with extended bits or in the MCS field with M bits LSB or MSB.

Optionally, the scrambling parameter of the second DCI is used to instruct a group of terminals to perform downlink waveform switching;

or alternatively, the process may be performed,

and the additional new domain or the target domain in the second DCI is used for indicating a group of terminals to execute downlink dynamic waveform switching.

Optionally, the first transmission module 602 is specifically configured to any one of the following:

when the downlink transmission is a downlink transmission not scheduled by DG, the terminal receives the downlink transmission scheduled by the control signaling on a transmission resource scheduled by the control signaling based on a waveform determined by the control signaling; the terminal receives the downlink transmission of the non-DG scheduling based on the waveform determined by the control signaling after the transmission resource of the control signaling scheduling;

In the case that the downlink transmission is a downlink transmission scheduled by a non-DG, the terminal does not receive downlink data from the network side device on a transmission resource scheduled by the control signaling; and the terminal receives the downlink transmission of the non-DG scheduling based on the waveform determined by the control signaling after the transmission resource of the control signaling scheduling.

Optionally, in a case that the downlink transmission is a downlink transmission scheduled by a non-DG, the control signaling is an activation DCI or a retransmission DCI.

Optionally, the third DCI is for at least one of:

respectively indicating terminals corresponding to each PDSCH to execute downlink dynamic waveform switching;

respectively indicating each PDSCH group in the at least one cell or carrier to execute downlink dynamic waveform switching;

respectively indicating each cell or carrier to execute downlink dynamic waveform switching;

respectively indicating each cell group or carrier group in the at least one cell or carrier to execute downlink dynamic waveform switching;

collectively indicating all PDSCHs to execute downlink dynamic waveform switching;

each PDSCH subgroup of the at least one PDSCH is instructed to perform downlink dynamic waveform switching, respectively.

Optionally, the third DCI is configured to instruct the PDSCH determined based on the target information to perform downlink dynamic waveform switching; wherein the target information includes at least one of the following information:

The PDCCH carrying the third DCI and the PDSCH transmitted by the scheduling of the third DCI are provided with distance information;

sequence information of resource allocation information of a scheduling PDSCH in the third DCI;

cell identification ID information used for scrambling parameters of a PDCCH carrying the third DCI;

and the cell ID used by the scrambling parameter of the PDCCH carrying the third DCI is primary cell ID or secondary cell ID information.

Fig. 7 is a second schematic structural diagram of a downlink transmission apparatus according to an embodiment of the present application, as shown in fig. 7, the downlink transmission apparatus 700 is applied to a network side device, and includes:

a sending module 701, configured to send a control signaling to a terminal; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching;

and a second transmission module 702, configured to perform downlink transmission based on the waveform determined by the control signaling.

In the downlink transmission device provided by the embodiment of the application, the control signaling is sent to the terminal, the terminal knows that the network side equipment instructs the terminal to execute downlink dynamic waveform switching based on the control signaling, and then the terminal receives downlink transmission of the network side equipment on the waveform determined by the control signaling so as to correctly receive and demodulate, thereby realizing downlink dynamic waveform switching and improving transmission performance.

Optionally, the control signaling includes at least one of the following:

Optionally, the control signaling includes at least one of:

and the third DCI is used for indicating the terminal corresponding to the PDSCH of at least one physical downlink shared channel on at least one cell or carrier to execute downlink dynamic waveform switching.

all terminals with the same waveform transmit on the same bandwidth of the orthogonal frequency division multiplexing OFDM symbol;

A waveform is transmitted over the bandwidth of the same OFDM symbol.

Optionally, in the case that the waveform determined by the control signaling is a DFT-S-OFDM waveform, the generation manner of the DFT-S-OFDM waveform satisfies at least one of the following:

the virtual resource block to physical resource block VRB to PRB mapping does not enable interleaving;

the VRB to PRB mapping enables the inter, and the number of the VRB to PRB mapping does not exceed the precoding granularity;

the rate matching pattern set rateetchpatterntoaddmodlist is not configured or the rate matching indication Rate matching indicator is not enabled;

the LTE-to-cell reference signal CRS mapping mode LTE-CRS-ToMatchArnd is not configured;

under the condition of enabling interleaving and/or enabling rate matching, the frequency domain resources of downlink transmission configured by the network side equipment are not overlapped with interleaving resources and/or rate matching resources;

the frequency domain resource allocation number of the downlink transmission configured by the network side equipment comprises the following steps: 2. 3 or 5; or an integer multiple adjacent to 2, 3 or 5;

and when the generation mode of the DFT-S-OFDM waveform is the segment DFT generation mode, the resources of the same terminal in the frequency domain resources configured by the network side equipment are continuous.

The downlink transmission device in the embodiment of the present application may be an electronic device, for example, an electronic device with an operating system, or may be a component in an electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The downlink transmission device provided in the embodiment of the present application can implement each process implemented by the embodiments of the methods of fig. 2 to fig. 7, and achieve the same technical effects, so that repetition is avoided, and no further description is given here.

Fig. 8 is a schematic structural diagram of a communication device provided in the embodiment of the present application, as shown in fig. 8, the communication device 800 includes a processor 801 and a memory 802, where a program or an instruction that can be executed on the processor 801 is stored in the memory 802, and when the communication device 800 is a terminal, for example, the program or the instruction is executed by the processor 801 to implement the steps of the downlink transmission method embodiment, and the same technical effects can be achieved. When the communication device 800 is a network side device, the program or the instruction, when executed by the processor 801, implements the steps of the downlink transmission method embodiment described above, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface; the communication interface is used for receiving control signaling sent by the network side equipment; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching;

The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved.

Fig. 9 is a schematic structural diagram of a terminal provided in an embodiment of the present application, as shown in fig. 9, where the terminal 900 includes, but is not limited to: at least some of the components of the radio frequency unit 901, the network module 902, the audio output unit 903, the input unit 904, the sensor 905, the display unit 906, the user input unit 907, the interface unit 908, the memory 909, and the processor 910, etc.

Those skilled in the art will appreciate that the terminal 900 may further include a power source (e.g., a battery) for powering the various components, and the power source may be logically coupled to the processor 910 by a power management system so as to perform functions such as managing charging, discharging, and power consumption by the power management system. The terminal structure shown in fig. 9 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine some components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 904 may include a graphics processing unit (Graphics Processing Unit, GPU) 9041 and a microphone 9042, with the graphics processor 9041 processing image data of still pictures or video obtained by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 907 includes at least one of a touch panel 9071 and other input devices 9072. Touch panel 9071, also referred to as a touch screen. The touch panel 9071 may include two parts, a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In this embodiment, after receiving downlink data from a network side device, the radio frequency unit 901 may transmit the downlink data to the processor 910 for processing; in addition, the radio frequency unit 901 may send uplink data to the network side device. Typically, the radio frequency unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 909 may be used to store software programs or instructions as well as various data. The memory 909 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 909 may include a volatile memory or a nonvolatile memory, or the memory 909 may include both volatile and nonvolatile memories. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 909 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 910 may include one or more processing units; optionally, the processor 910 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, etc., and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 910.

The radio frequency unit 901 is configured to receive a control signaling sent by a network side device; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching;

the processor 910 is configured to receive downlink data from the network side device based on the waveform determined by the control signaling, or the terminal does not perform downlink dynamic waveform switching based on the waveform determined by the control signaling.

According to the terminal provided by the embodiment of the application, the control signaling sent by the network side equipment is received, the network side equipment is informed to instruct the terminal to execute downlink dynamic waveform switching based on the control signaling, and then the terminal receives downlink transmission of the network side equipment on the waveform determined by the control signaling so as to correctly receive and demodulate, so that the downlink dynamic waveform switching is realized, and the transmission performance is improved.

The embodiment of the application also provides network side equipment, which comprises a processor and a communication interface; the communication interface is used for sending control signaling to the terminal; the control signaling is used for indicating the terminal to execute downlink dynamic waveform switching; the processor is used for carrying out downlink transmission based on the waveform determined by the control signaling.

The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Fig. 10 is a schematic structural diagram of a network side device according to an embodiment of the present application, as shown in fig. 10, where the network side device 1000 includes: an antenna 1001, a radio frequency device 1002, a baseband device 1003, a processor 1004, and a memory 1005. The antenna 1001 is connected to a radio frequency device 1002. In the uplink direction, the radio frequency device 1002 receives information via the antenna 1001, and transmits the received information to the baseband device 1003 for processing. In the downlink direction, the baseband device 1003 processes information to be transmitted, and transmits the processed information to the radio frequency device 1002, and the radio frequency device 1002 processes the received information and transmits the processed information through the antenna 1001.

The method performed by the network side device in the above embodiment may be implemented in a baseband apparatus 1003, where the baseband apparatus 1003 includes a baseband processor.

The baseband apparatus 1003 may, for example, include at least one baseband board, where a plurality of chips are disposed on the baseband board, as shown in fig. 10, where one chip, for example, a baseband processor, is connected to the memory 1005 through a bus interface, so as to call a program in the memory 1005 to perform the network device operation shown in the above method embodiment.

The network side device may also include a network interface 1006, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 1000 of the embodiment of the present invention further includes: the instructions or programs stored in the memory 1005 and capable of running on the processor 1004 are not repeated here for avoiding repetition, and the processor 1004 calls the instructions or programs in the memory 1005 to execute the network side device side downlink transmission method described above and achieve the same technical effects.

The embodiment of the application also provides a downlink transmission system, which comprises: the terminal can be used for executing the steps of the downlink transmission method of the terminal side, and the network side device can be used for executing the steps of the downlink transmission method of the network side device.

The embodiment of the present application further provides a readable storage medium, which may be volatile or non-volatile, and the readable storage medium stores a program or an instruction, where the program or the instruction implements each process of the downlink transmission method embodiment described above when being executed by a processor, and the same technical effects can be achieved, so that repetition is avoided, and no further description is provided herein.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction, implement each process of the downlink transmission method embodiment, and achieve the same technical effect, so that repetition is avoided, and no redundant description is given here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product, where the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement each process of the downlink transmission method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and details are not repeated herein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A downlink transmission method, comprising:

2. The method according to claim 1, wherein the control signaling comprises at least one of:

3. The method according to claim 1 or 2, characterized in that the method further comprises at least one of the following:

the terminal receives a Radio Resource Control (RRC) signaling sent by the network side equipment, wherein the RRC signaling is used for enabling downlink dynamic waveform switching; the terminal responds to the RRC signaling and enables downlink dynamic waveform switching;

The terminal is configured to enable downlink dynamic waveform switching by default;

and the terminal reports capability information to the network side equipment, wherein the capability information is used for indicating the terminal to support downlink dynamic waveform switching.

4. A method according to any of claims 1-3, wherein the downlink data corresponds to at least one of the following transmissions:

semi-persistent scheduling SPS-PDSCH transmissions;

RRC configures scheduled PDSCH transmissions;

physical downlink control channel, PDCCH, transmission.

5. A method according to any of claims 1-3, characterized in that the control signaling comprises at least one of:

6. The method of claim 5, wherein the format type of the first DCI is used to indicate that the network side device has triggered a downlink action waveform switch or a downlink transmission waveform of the network side device.

7. The method of claim 5, wherein an additional new field or a target field in the first DCI instructs a particular terminal to perform a downlink dynamic waveform switching.

8. The method of claim 7, wherein the target field in the first DCI comprises at least one of:

FDRA domain is allocated to frequency domain resource;

an antenna port domain;

modulation and coding strategy MCS field;

9. The method of claim 8, wherein the FDRA domain comprises N1 bits; the N1 bits are used to indicate that the network side device has triggered downlink waveform switching or downlink transmission waveform of the network side device; the N1 is a positive integer;

or alternatively, the process may be performed,

10. The method of claim 8, wherein the anticnna port field comprises N4 bits and/or N5 bits;

11. The method of claim 8, wherein the rank information indicated by the antenna port field is used to indicate a downlink transmission waveform of the network side device; or alternatively, the process may be performed,

12. The method of claim 11, wherein the MCS table type information is carried on extended bits in the MCS field or on M-bit LSBs or MSBs in the MCS field.

13. The method of claim 5, wherein the scrambling parameter of the second DCI is used to instruct a group of terminals to perform a downlink dynamic waveform switch;

or alternatively, the process may be performed,

14. A method according to any one of claims 1-3, wherein the terminal receives downlink data from the network side device based on the waveform determined by the control signaling, and comprises any one of the following:

15. The method of any of claims 1-3, wherein the control signaling is an activation DCI or a retransmission DCI if the downlink transmission is a non-DG scheduled downlink transmission.

16. The method of claim 5, wherein the third DCI is for at least one of:

17. The method of claim 5, wherein the third DCI is for instructing a PDSCH determined based on target information to perform downlink dynamic waveform switching; wherein the target information includes at least one of the following information:

18. A method according to any one of claims 1-3, further comprising any one of the following:

when the waveform determined by the control signaling is not matched with the resource allocation type of the terminal, the terminal receives downlink data from the network side equipment by using the resource allocation type matched with the waveform determined by the control signaling;

under the condition that the waveform determined by the control signaling is not matched with the resource allocation type of the terminal, the terminal does not expect the network side equipment to simultaneously configure the waveform determined by the control signaling and the resource allocation type;

under the condition that downlink dynamic waveform switching is enabled, the terminal uses a target resource allocation type to receive downlink data from the network side equipment; wherein the target resource allocation type is a resource allocation type with continuous resources;

under the condition that the waveform determined by the control signaling is not matched with the MCS information of the terminal, the terminal does not expect the network side equipment to simultaneously configure the waveform determined by the control signaling and the MCS information;

And under the condition that the waveform determined by the control signaling is not matched with the MCS information of the terminal, the terminal receives downlink data from the network side equipment by using the MCS information matched with the waveform determined by the control signaling.

19. A method according to any of claims 1-3, wherein the waveform determined by the terminal based on the control signaling does not perform a downlink dynamic waveform switching, comprising:

the terminal does not execute downlink dynamic waveform switching under the condition that the waveform determined by the control signaling is not matched with the resource allocation type of the terminal; or alternatively, the process may be performed,

and under the condition that the waveform determined by the control signaling is not matched with the MCS information of the terminal, the terminal does not execute downlink waveform switching.

20. A downlink transmission method, comprising:

21. The method according to claim 20, wherein the control signaling comprises at least one of:

22. The method according to claim 20 or 21, wherein the control signaling comprises at least one of:

23. The method according to any one of claims 20-22, wherein the network side device performs downlink transmission based on the waveform determined by the control signaling if the target requirement is met; wherein the target requirement includes at least one of:

A waveform is transmitted over the bandwidth of the same OFDM symbol.

24. The method according to any of claims 20-22, wherein in case the waveform determined by the control signaling is a discrete fourier transform spread orthogonal frequency division multiplexing, DFT-S-OFDM, waveform, the DFT-S-OFDM waveform is generated in a manner that satisfies at least one of:

25. A downlink transmission apparatus, comprising:

26. A downlink transmission apparatus, comprising:

27. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the downlink transmission method according to any one of claims 1 to 19.

28. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the downlink transmission method according to any one of claims 20 to 24.

29. A readable storage medium, wherein a program or instructions is stored on the readable storage medium, which when executed by a processor, implements the downlink transmission method according to any one of claims 1 to 19, or the steps of the downlink transmission method according to any one of claims 20 to 24.