WO2023134585A1

WO2023134585A1 - Downlink transmission method, and terminal and network-side device

Info

Publication number: WO2023134585A1
Application number: PCT/CN2023/071075
Authority: WO
Inventors: 顾一; 潘学明
Original assignee: 维沃移动通信有限公司
Priority date: 2022-01-12
Filing date: 2023-01-06
Publication date: 2023-07-20
Also published as: CN116489792A

Abstract

The present application belongs to the technical field of communications. Disclosed are a downlink transmission method, and a terminal and a network-side device. The downlink transmission method disclosed in the embodiments of the present application comprises: a terminal receiving control signaling, which is sent by a network-side device, wherein the control signaling is used for instructing the terminal to execute downlink dynamic waveform switching; and the terminal receiving downlink data from the network-side device on the basis of a waveform, which is determined by the control signaling, or the terminal not executing downlink dynamic waveform switching on the basis of the waveform, which is determined by the control signaling.

Description

Downlink transmission method, terminal and network side equipment

Cross References to Related Applications

This application claims the priority of the Chinese patent application with application number 202210033023.7 filed on January 12, 2022, entitled "Downlink Transmission Method, Terminal, and Network Side Equipment", which is fully incorporated by reference into this application.

technical field

The present application belongs to the technical field of communications, and in particular relates to a downlink transmission method, terminal and network side equipment.

Background technique

The new mobile communication technology needs to support higher carrier frequency, and the frequency band 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 (Power Amplifier, PA) decreases as the frequency of the wireless signal increases. The power of the signal.

In related technologies, the base station does not support downlink dynamic waveform switching; however, because the cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) waveform cannot guarantee the peak power ratio (Peak-to-Average Power Ratio, PAPR) performance, and the discrete Fu Lie transform extended orthogonal frequency division multiplexing (DFT-S-OFDM) waveform will limit the waveform transmission rate, which leads to low power utilization and poor transmission performance.

Contents of the invention

Embodiments of the present application provide a downlink transmission method, a terminal, and a network side device, which can solve the problem of poor transmission performance.

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

The terminal receives the control signaling sent by the network side device; wherein the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching;

The terminal receives the 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 a second aspect, a downlink transmission method is provided, and the method includes:

The network side device sends control signaling to the terminal; wherein, the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching;

The network side device performs downlink transmission based on the waveform determined by the control signaling.

In a third aspect, a downlink transmission device is provided, and the device includes:

The receiving module is configured to receive the control signaling sent by the network side device; wherein, the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching;

The first transmission module 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.

In a fourth aspect, a downlink transmission device is provided, which includes:

A sending module, configured to send control signaling to the terminal; wherein the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching;

The second transmission module is configured to perform downlink transmission based on the waveform determined by the control signaling.

In a fifth aspect, a terminal is provided, the terminal includes a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, the following The steps of the method in one aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface; wherein the communication interface is used to receive control signaling sent by a network side device; wherein the control signaling is used to instruct the terminal to perform downlink Dynamic waveform switching;

The processor 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.

In a seventh aspect, a network-side device is provided, the network-side device includes a processor and a memory, the memory stores programs or instructions that can run on the processor, and the programs or instructions are executed by the processor When realizing the steps of the method as described in the second aspect.

In an eighth aspect, a network side device is provided, including a processor and a communication interface; wherein the communication interface is used to send control signaling to a terminal; wherein the control signaling is used to instruct the terminal to perform downlink dynamic Waveform switching;

The processor is configured to perform downlink transmission based on the waveform determined by the control signaling.

A ninth aspect provides a downlink transmission system, including: a terminal and a network-side device, the terminal can be used to perform the steps of the method described in the first aspect, and the network-side device can be used to perform the steps of the method described in the second aspect steps of the method described above.

In a tenth aspect, a readable storage medium is provided, and a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method as described in the first aspect are implemented, or the The steps of the method described in the second aspect.

In an eleventh aspect, a chip is provided, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or an instruction to implement the method described in the first aspect. method, or implement the method as described in the second aspect.

In a twelfth aspect, a computer program/program product is provided, 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 the The steps of the method, or realize the steps of the method as described in the second aspect.

In this embodiment of the present application, the terminal receives the control signaling sent by the network-side device, and learns based on the control signaling that the network-side device instructs the terminal to perform downlink dynamic waveform switching. Then, the terminal receives the signal from the network-side device on the waveform determined by the control signaling. Downlink transmission for correct reception and demodulation, so as to realize downlink dynamic waveform switching and improve transmission performance.

Description of drawings

FIG. 1 is a schematic diagram of a wireless communication system applicable to an embodiment of the present application;

FIG. 2 is one of the schematic flowcharts of the downlink transmission method provided by the embodiment of the present application;

FIG. 3 is one of the schematic diagrams of the timing relationship and scheduling process provided by the embodiment of the present application;

FIG. 4 is the second schematic diagram of the timing relationship and scheduling process provided by the embodiment of the present application;

FIG. 5 is the second schematic flow diagram of the downlink transmission method provided by the embodiment of the present application;

FIG. 6 is one of the structural schematic diagrams of the downlink transmission device provided by the embodiment of the present application;

FIG. 7 is the second structural schematic diagram of the downlink transmission device provided by the embodiment of the present application;

FIG. 8 is a schematic structural diagram of a communication device provided by 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 provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application belong to the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. 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 described herein and that "first" and "second" distinguish objects. It is usually one category, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the description and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

It is worth pointing out that the technology described in the embodiment of this application is not limited to the Long Term Evolution (Long Term Evolution, LTE)/LTE-Advanced (LTE-Advanced, LTE-A) system, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), 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 the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned system and radio technology, and can also be used for other systems and radio technologies. The following description describes the New Radio (New Radio, NR) system for exemplary purposes, and uses NR terms in most of the following descriptions, but these techniques can also be applied to communication systems other than NR system applications, such as the 6th generation (6 ^th Generation, 6G) communication system.

FIG. 1 is a schematic diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system shown in FIG. 1 includes a terminal 11 and a network side device 12 . Wherein, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, a super mobile personal computer (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) equipment, robot, wearable device (Wearable Device) , vehicle equipment (VUE), pedestrian terminal (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computers, PCs), teller machines or self-service Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), Smart wristbands, smart clothing, etc. It should be noted that, the embodiment of the present application does not limit the specific type of the terminal 11 . The network side device 12 may include an access network device or a core network device, wherein the access network device 12 may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or Wireless access network unit. The access network device 12 may include a base station, a WLAN access point, or a WiFi node, etc., and the base station may be called a Node B, an evolved Node B (eNB), an access point, a Base Transceiver Station (Base Transceiver Station, BTS), a radio Base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B, Home Evolved Node B, Transmitting Receiving Point (TRP) or all As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in this embodiment of the application, only the base station in the NR system is used as an example for introduction, and The specific type of the base station is not limited.

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

The embodiment of the present application provides a downlink transmission method. The downlink transmission method can be applied to a wireless communication system that supports more than two waveforms. The terminal receives the control signaling sent by the network-side device, and learns that the network-side device indicates the terminal based on the control signaling. Perform downlink dynamic waveform switching, and then, the terminal receives the downlink transmission of the network side equipment on the waveform determined by the control signaling to perform correct reception and demodulation, thereby realizing downlink dynamic waveform switching and improving transmission performance.

Fig. 2 is one of the flow diagrams of the downlink transmission method provided by the embodiment of the present application. As shown in Fig. 2, the method includes steps 201-202; wherein:

Step 201, the terminal receives the control signaling sent by the network side device; wherein the control signaling is used to instruct the terminal to perform 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 perform downlink dynamic waveform switching based on the waveform determined by the control signaling.

It should be noted that the embodiments of the present application can be applied to a wireless communication system that supports more than two waveforms. The terminal includes but not limited to the type of terminal 11 listed above; the network side device includes but not limited to the type of network side device 12 listed above, which is not limited in this application. It can be understood that the embodiments of the present application may also be used in a scenario of an unlicensed (unlicense) frequency band.

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) Downlink dynamic waveform switching enable indication information, used to enable downlink dynamic waveform switching.

b) Downlink dynamic waveform switching indication information, used to indicate that the network side device has triggered downlink dynamic waveform switching.

c) Downlink waveform indication information, used to indicate the downlink transmission waveform of the network side device.

In practice, in addition to the way in which the network-side device sends downlink dynamic waveform switching enabling indication information to the terminal, at least one of the following methods can be adopted to enable the terminal to enable downlink dynamic waveform switching:

Mode 1), the terminal receives the radio resource control (Radio Resource Control, RRC) signaling sent by the network side equipment, and the RRC signaling is used to enable downlink dynamic waveform switching; the terminal responds to the RRC signaling, using Can downlink dynamic waveform switching. For example, the control signaling is downlink control information (Downlink Control Information, DCI).

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

Mode 3), the terminal reports capability information to the network side device, and the capability information is used to indicate that the terminal supports downlink dynamic waveform switching, that is, the terminal may have the capability of receiving dynamic waveform switching. The terminal may enable downlink dynamic waveform switching by default, or the terminal may use RRC signaling to indicate whether the terminal is capable of receiving dynamic waveform switching.

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

(1) Physical Downlink Shared Channel (PDSCH) scheduled by Dynamic grant (DG) scheduling;

(2) Semi-Persistent Scheduling (Semi-Persistent Scheduling, SPS)-PDSCH transmission;

(3) PDSCH transmission scheduled by RRC configuration;

(4) Message 2 (MSG2) transmission or message 4 (MSG4) transmission of 4-step random access scheduling;

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

(6) Physical Downlink Control Channel (PDCCH) transmission.

That is to say, the control signaling is applicable to at least one downlink transmission (transmission) in (1) to (6) above.

Optionally, 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 present application, the terminal receives the control signaling sent by the network side equipment, and learns based on the control signaling that the network side equipment instructs the terminal to perform downlink dynamic waveform switching, and then, the terminal receives on the waveform determined by the control signaling The downlink transmission of the network side equipment is used for correct reception and demodulation, so as to realize downlink dynamic waveform switching and improve transmission performance.

The specific implementation of the control signaling in the embodiment of the present application will be described below. The implementation of the control signaling may include any of the following:

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

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

Way 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 dynamic waveform switching.

Here, methods 1-3 are explained separately:

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

1) The format type of the first DCI is used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device.

2) An additional new field in the first DCI is used to instruct a specific terminal to perform 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 field includes N bits, and N is a positive integer;

Wherein, the N bits are used to indicate at least one of the following: downlink dynamic waveform switching enable indication information; downlink dynamic waveform switching indication information; downlink waveform indication information.

3) The target field in the first DCI is used to instruct a specific terminal to perform downlink dynamic waveform switching. Specifically, the target field in the first DCI includes at least one of the following: downlink dynamic waveform switching enable indication information; downlink dynamic waveform switching indication information; downlink waveform indication information.

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

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

Antenna port field;

Modulation and Coding Scheme (MCS) domain;

A priority indicator (priority indicator) field; wherein, the priority information indicated by the priority indicator field is used to indicate the downlink transmission waveform of the network side device.

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

a) In the case where the target domain includes an FDRA domain, the FDRA domain includes an N1 bit; wherein, the N1 bit is used to indicate that the network side device has triggered downlink dynamic waveform switching or the network side device's Downlink transmission waveform; the N1 is a positive integer. The N1 bit is at least one extra bit added in the FDRA field.

For example, when 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 field in the first DCI, an additional 1 bit is added, Use 2 bits in the FDRA domain (that is, multiplex the existing 1 bit + additional 1 bit) to jointly indicate the resource allocation type and the downlink dynamic waveform switching triggered by the network side device, or jointly indicate the resource allocation type and the downlink of the network side device transmit waveform. See Table 1.

Table 1

b) When the target domain includes an FDRA domain and an MCS domain, the FDRA domain includes N2 bits, and the MCS domain includes N3 bits; the N2 bits and the N3 bits are used to indicate the The network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device; wherein, the N2 bit is used to indicate the resource allocation type, and the N3 bit is used to indicate MCS level information or MCS table type information, so Said N2 is a positive integer, said N3 is an integer. The N2 bits are existing bits in the FDRA field; the N3 bits are existing bits in the MCS field. Optionally, 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 bit is also used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device.

For example, in the case that the terminal has enabled downlink dynamic waveform switching, and the resource allocation type configured by the network side equipment is dynamic switching (dynamic switch), in the existing size of the FDRA domain, reuse the existing The 1bit MSB of the resource allocation type uses the 1bit MSB in the FDRA field to simultaneously indicate the resource allocation type and the downlink dynamic waveform switching triggered by the network side device, or simultaneously indicate the resource allocation type and the downlink transmission waveform of the network side device. Or, use the N2 bit included in the FDRA field and the N3 bit included in the MCS field to jointly indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device. See Table 2.

Table 2

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

For example, when the terminal has enabled downlink dynamic waveform switching, add a column to the table in the Antenna port field. This new column is used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device . Or, use the reserved (reserve) bit in the antenna port to indicate that the network side device has triggered the downlink dynamic waveform switching or the downlink transmission waveform of the network side device.

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

d) In the case where the target domain includes the antenna port domain, the rank information indicated by the antenna port domain is used to indicate the downlink transmission waveform of the network side device.

Optionally, in the case that the terminal has enabled downlink dynamic waveform switching, only rank information is used for indication. For example, a threshold N is preset, and if rank<=N, it is determined that the downlink transmission waveform implicitly indicating the network-side device is a DFT waveform; if rank>N, it is determined that the downlink transmission waveform implicitly indicating the network-side device is a CP waveform .

e) In the case where the target domain includes an antenna port domain and an MCS domain, the rank information indicated by the antenna port domain and the MCS level information or MCS table type information indicated by the MCS domain are used to indicate the network side The device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device.

Optionally, when the terminal enables downlink dynamic waveform switching, joint indication is performed based on the MCS field and the rank field.

f) When the target domain includes the MCS domain, the MCS level information or MCS table type information indicated by the MCS domain is used to indicate the downlink transmission waveform of the network side device. Optionally, the MCS table type information is carried in the extended bits in the MCS field, or in the M-bit LSB or MSB in the MCS field.

Optionally, the terminal may determine the downlink transmission waveform of the network-side device according to the MCS level information indicated by the MCS field; or, the terminal may determine the network-side device's downlink transmission waveform according to the MCS table type information indicated by the MCS field. downlink transmission waveform. MCS table types include mcs-table Transform Precoder or mcs-table. For example, some bits are expanded in the MCS field to indicate the MCS table type information; or, some bits are multiplexed in the MCS field, for example, M bits of LSB or MSB are multiplexed to indicate the MCS table type information.

For mode 2, the second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching; the second DCI is Group common DCI. The second DCI can indicate not only dynamically scheduled downlink transmission, but also semi-static downlink transmission. Optionally, the second DCI is used to: notify one or a group of terminals that the network-side device triggers downlink dynamic waveform switching.

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

1) The scrambling parameter of the second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching.

For example, define or add a group DCI for waveform indication, scrambled by a specific RNTI, for example, scrambled by a waveform RNTI (waveform RNTI, WF-RNTI), and multiple terminals confirm the group DCI through the group DCI The network side device has triggered downlink dynamic waveform switching, or the downlink transmission waveform of the network side device.

Optionally, the second DCI multiplexes the existing group DCI command, and adds a new function to the existing group DCI format, and the new function is used to instruct the terminal to perform downlink dynamic waveform switching. For example, for format 2-0, configure high-level signaling parameters (such as waveformswitching), once the parameter is enabled, set waveformswitching indicator 1, waveformswitching indicator 2, etc., these waveformswitching indicator 1 and waveformswitching indicator 2 are used to indicate the network side equipment The downlink dynamic waveform switch or the downlink transmission waveform of the network side device has been triggered.

2) An additional new field in the second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching. Specifically, the additional new field in the second DCI includes at least one of the following: downlink dynamic waveform switching enable indication information; downlink dynamic waveform switching indication information; downlink waveform indication information.

Optionally, the second DCI multiplexes the existing group DCI command, and adds a new field to the existing group DCI format, and the added new field is used to instruct the terminal to perform downlink dynamic waveform switching. For example, for format 2-0, when the high-level signaling parameter is configured as availableRB-SetsToAddModList is enabled, additional bits are added after each indicator, or a part of bits is added after the overall indicator function ends to form a new indicator field. The new indication field is used to indicate that the network side device has triggered the downlink dynamic waveform switching or the downlink transmission waveform of the network side device.

3) The target field in the second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching. Specifically, the target field in the second DCI includes at least one of the following: downlink dynamic waveform switching enable indication information; downlink dynamic waveform switching indication information; downlink waveform indication information.

Optionally, the second DCI multiplexes the existing group DCI command, multiplexes the existing field on the existing format, and multiplexes a part or all of the bits in the existing field to instruct the terminal to execute the downlink dynamic waveform switch. For example, for format 2-1, it is considered that each preemption indicator needs to be transmitted using a switched waveform or a specific waveform.

Alternatively, the idle bits in the payload of the group DCI are used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device. When the number of transmission bits does not meet the maximum number of bits configured by the high-level or the number of bits in the specific field corresponding to the monitored DCI in the public search space requires DCI alignment, zero padding is no longer performed, and the spare part to be filled with zeros is used Perform waveform switching or waveform indication.

For non-dynamically scheduled downlink transmission, if the network-side device performs downlink dynamic waveform switching, the network-side device can not only indicate through the group DCI, but also implement control signaling to indicate the non-dynamically scheduled downlink transmission through the following methods, indicating The network side device has triggered the downlink dynamic waveform switching or the downlink transmission waveform of the network side device.

a) The default one follows the rules. During the transmission period, if the network-side device uses a waveform different from that of the non-dynamic transmission and a substantive transmission occurs in the last dynamic scheduling downlink immediately before the non-dynamic downlink transmission, the default from the transmission period starts For downlink transmission, the network side device also sends according to the dynamically scheduled waveform, and the terminal needs to receive the corresponding waveform. In this way, waveform switching or target waveform indication can be realized.

Optionally, the terminal receives 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 non-DG scheduled downlink transmission, the terminal is in the On the transmission resource scheduled by the control signaling, receive the downlink transmission scheduled by the control signaling based on the waveform determined by the control signaling; after the transmission resource scheduled by the control signaling, the terminal receives the The waveform receives the non-DG scheduled downlink transmission. Figure 3 is one of the schematic diagrams of the timing relationship and scheduling process provided by the embodiment of the present application. Referring to Figure 3, the network side device indicates that the waveform switching of the SPS-PDSCH has occurred by scheduling the PDSCH of a DG; the SPS-PDSCH can refer to the previous DG-PDSCH. For the transmission waveform of PDSCH, when the transmission waveform of DG-PDSCH is different from that of SPS-PDSCH, the terminal modifies the waveform with reference to the transmission waveform of DG-PDSCH to realize downlink dynamic waveform switching.

b) Design a new DCI, which can make the non-dynamically scheduled PDSCH refer to its coordination information when scheduling the DG PDSCH. The DCI may still be a regular DCI (eg CS-RNTI scrambled DCI). During the non-dynamically scheduled transmission period, if the new DCI before and closest to a certain configured scheduled transmission period has an instruction to switch the downlink waveform or determines the target downlink transmission waveform, and does not perform the actual transmission of the PDSCH, then from The downlink transmission at the beginning of the transmission period can follow the dynamically scheduled waveform to implement waveform switching or target waveform indication.

Optionally, the implementation of the terminal receiving downlink data from the network side device based on the waveform determined by the control signaling may include: when the downlink transmission is a non-DG scheduled downlink transmission, the terminal The downlink data from the network side device is not received on the transmission resource scheduled by the control signaling; the terminal receives the non-downlink data based on the waveform determined by the control signaling after the transmission resource scheduled by the control signaling Downlink transmission scheduled by DG. Figure 4 is the second schematic diagram of the timing relationship and scheduling process provided by the embodiment of this application. Referring to Figure 4, the DCI falsely indicates that the next DG-PDSCH configuration is to be scheduled, but the PDSCH transmission cannot be actually scheduled; SPS-PDSCH can refer to the previous DG - The scheduling information of the PDSCH modifies its own waveform. That is, the terminal refers to the scheduling information of the DCI to know that the network-side device has modified the waveform or has switched waveforms, so that the terminal receives the SPS-PDSCH sent by the network-side device on the waveform indicated by the DCI.

c) When the downlink transmission is non-DG scheduled downlink transmission, the control signaling is DCI activation or DCI retransmission. That is, the indication information of waveform switching is configured in the activation DCI or the retransmission DCI. The DCI may be DCI scrambled by CS-RNTI, and the indication method is the same as that of common DCI.

d) Considering that the dynamic waveform switching indication of the network side equipment cannot be supported in the non-dynamically scheduled PDSCH.

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

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

2) The third DCI respectively instructs each PDSCH group in at least one cell or carrier to perform downlink dynamic waveform switching. For example, the third DCI may respectively indicate downlink transmission waveforms of PDSCHs of each PDSCH group in each cell or each carrier. Optionally, the PDSCH under each cell is divided into multiple groups, and the PDSCH of each group has a bit indicating whether to switch waveforms or to indicate downlink transmission waveforms.

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

4) The third DCI respectively instructs each cell group or carrier group in the at least one cell or carrier to perform downlink dynamic waveform switching. For example, the third DCI may respectively indicate the unified PDSCH downlink transmission waveform in the cells of each group or the carriers of each group. Optionally, cells/carriers are divided into multiple groups, and all PDSCHs under the cells/carriers of each group indicate whether to switch waveforms or indicate downlink transmission waveforms by a bit.

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

6) The third DCI respectively instructs each PDSCH group in at least one PDSCH to perform downlink dynamic waveform switching. For example, the third DCI may respectively indicate the downlink transmission waveform of the scheduled PDSCH of each group. Optionally, all PDSCH transmissions scheduled by the DCI are divided into multiple groups, and all PDSCHs in each group have a bit indicating whether to switch waveforms or to indicate downlink transmission waveforms.

Optionally, the third DCI is used to instruct the PDSCH determined based on the target information to perform downlink dynamic waveform switching. Which one or more PDSCH transmissions the downlink transmission waveform information indicated by the third DCI that schedules multiple PDSCH transmissions is applicable to may depend on the target information. Wherein, the target information includes at least one of the following information:

(1) Distance information between the PDCCH carrying 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 closest to the PDCCH where the third DCI is located.

(2) Sequence information of resource configuration information for scheduling PDSCH in the third DCI.

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

Alternatively, in the third DCI, 4 resource configuration information (grants) are used to schedule 4 PDSCHs, and 2 bits can respectively indicate in order whether the first two (the first and the second of the 4) PDSCH waveforms are switched.

Alternatively, in the third DCI, 4 resource configuration information (grants) are used to schedule 4 PDSCHs, and 4 bits can respectively indicate whether the waveforms of the 4 PDSCHs are switched in sequence.

Alternatively, in the third DCI, 4 resource configuration information (grants) are used to schedule 4 PDSCHs, and 2 bits can respectively indicate whether the waveforms of the first two PDSCHs and the last two PDSCHs are switched in sequence.

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 configuration; antenna port configuration.

(3) Cell identification (ID) information used by the scrambling parameters of the 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 PDSCHs scheduled by the DCI in the cell corresponding to the cell ID.

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

Optionally, if the cell ID is the primary cell, the waveform information in the third DCI is only used to indicate the information of the base station transmission waveform or the base station switching waveform of all PDSCHs of the primary cell; if the cell ID is the secondary cell ID, the third The waveform or waveform switching information in the DCI is applicable to the waveform or waveform switching information of one or more PDSCHs scheduled by the DCI in all cells.

Optionally, the solutions of the embodiments of the present application may also include any of the following:

1) In the case that the waveform determined by the control signaling does not match the resource allocation type of the terminal, the terminal uses the resource allocation type that matches the waveform determined by the control signaling to receive information from the network side device downlink data.

For example, if the network side equipment adopts or switches to DFT-S-OFDM waveform, but the resource allocation type indicated by the terminal is type 0, or the resource allocation type indicated by the terminal is dynamic switching, but is further indicated as type 0 by DCI, then The terminal is forced to use type 1 to receive downlink transmissions.

2) When the waveform determined by the control signaling does not match the resource allocation type of the terminal, the terminal does not expect the network side device to configure the waveform determined by the control signaling and the resource allocation at the same time type.

For example, if the network side equipment adopts or switches to DFT-S-OFDM waveform, but the resource allocation type indicated by the terminal is type 0, or the resource allocation type indicated by the terminal is dynamic switching, but is further indicated as type 0 by DCI, then Terminals do not expect such scheduled transmissions to occur.

3) When downlink dynamic waveform switching is enabled, the terminal uses a target resource allocation type to receive downlink data from the network side device; wherein, 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 uniformly configures the terminal in the type 1 mode when waveform switching transmission is enabled.

4) In the case that the waveform determined by the control signaling does not match the MCS information of the terminal, the terminal does not expect the network side device to simultaneously configure the waveform determined by the control signaling and the MCS information. That is, the terminal does not expect that the waveform determined by the control signaling does not match the MCS information of the terminal.

5) When the waveform determined by the control signaling does not match the MCS information of the terminal, the terminal uses the MCS information that matches the waveform determined by the control signaling to receive the downlink from the network side device data. For example, the terminal discards some data and lowers the MCS for reception.

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

1) When the waveform determined by the control signaling does not match the resource allocation type of the terminal, the terminal does not perform downlink dynamic waveform switching;

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

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

2) If the waveform determined by the control signaling does not match the MCS information of the terminal, the terminal does not perform downlink dynamic waveform switching. That is, in this case, the terminal ignores the scheduling of the DCI and does not perform downlink dynamic waveform switching.

Fig. 5 is the second schematic flow diagram of the downlink transmission method provided by the embodiment of the present application. As shown in Fig. 5, the method includes steps 501-502; wherein:

Step 501, the network side device sends a control signaling to the terminal; wherein the control signaling is used to instruct the terminal to perform 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 this application, the network-side device sends control signaling to the terminal, and the terminal learns based on the control signaling that the network-side device instructs the terminal to perform downlink dynamic waveform switching, and then the terminal receives the waveform on the waveform determined by the control signaling. The downlink transmission of the network side equipment is used for correct reception and demodulation, so as to realize downlink dynamic waveform switching and improve transmission performance.

Optionally, the control signaling includes at least one of the following: a first DCI, used to instruct a specific terminal to perform downlink dynamic waveform switching; a second DCI, used to instruct a group of terminals to perform downlink dynamic waveform switching; the second The DCI is Group common DCI; 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 dynamic waveform switching.

Optionally, when the target requirement is met, the network side device performs downlink transmission based on the waveform determined by the control signaling; wherein the target requirement includes at least one of the following:

1) All terminals with the same waveform transmit on the bandwidth of the same Orthogonal Frequency Division Multiplexing (OFDM) symbol.

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

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

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

3) The DFT transformation of the network side device can be applied to the overall DFT (for example, the entire BWP) or to the frequency domain resources allocated to each user respectively.

Optionally, in the case that the waveform determined by the control signaling is a discrete Fourier transform extended orthogonal frequency division multiplexing (DFT-S-OFDM) waveform, regardless of the generation method of the downlink DFT-S-OFDM as a whole The DFT or partial DFT generation method, and the DFT-S-OFDM waveform generation method need to meet at least one of the following:

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

b) Interleave is enabled for VRB to PRB mapping, and the number of VRB to PRB mappings does not exceed the precoding granularity;

For example, if the precoding granularity is 4, the mapping from VRBs to PRBs cannot exceed 4 RBs. Optionally, interleave is not enabled from VRB to PRB.

c) The rate matching mode set (rateMatchPatternToAddModList) is not configured; or, configured but not activated, that is, the rate matching indicator (Rate matching indicator) is not enabled;

d) Long-term evolution (LTE) to cell reference signal (Cell Reference Signal, CRS) mapping method (lte-CRS-ToMatchAround) is not configured;

e) When interleaving and/or rate matching are enabled, the frequency domain resources configured by the network side device for downlink transmission do not overlap with interleaving resources and/or rate matching resources;

f) The number of frequency domain resource allocations for downlink transmission configured by the network side device includes: an integer multiple of 2, 3 or 5; or an integer multiple close to 2, 3 or 5;

g) In the case where the DFT-S-OFDM waveform is generated in a segmented DFT generation method, among the frequency domain resources configured by the network side device, the resources of the same terminal are continuous.

The downlink transmission method provided in the embodiment of the present application may be executed by a downlink transmission device. In the embodiment of the present application, the downlink transmission device performing the downlink transmission method is taken as an example to describe the downlink transmission device provided in the embodiment of the present application.

FIG. 6 is one of the structural schematic diagrams of the downlink transmission device provided by the embodiment of the present application. As shown in FIG. 6, the downlink transmission device 600 is applied to a terminal and includes:

The receiving module 601 is configured to receive control signaling sent by the network side device; wherein, the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching;

The first transmission module 602 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.

In the downlink transmission device provided in the embodiment of the present application, the control signaling sent by the network side equipment is received, and based on the control signaling, it is learned that the network side equipment instructs the terminal to perform downlink dynamic waveform switching, and then receives the network side waveform on the waveform determined by the control signaling. The downlink transmission of the equipment is used for correct reception and demodulation, so as to realize downlink dynamic waveform switching and improve transmission performance.

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

Downlink dynamic waveform switching enable indication information, used to enable downlink dynamic waveform switching;

Downlink dynamic waveform switching indication information, used to indicate that the network side device has triggered downlink dynamic waveform switching;

The downlink waveform indication information is used to indicate the downlink transmission waveform of the network side device.

Optionally, the device also includes at least one of the following:

An enabling module, configured to receive radio resource control RRC signaling sent by the network side device, where the RRC signaling is used to enable downlink dynamic waveform switching; in response to the RRC signaling, enable downlink dynamic waveform switching;

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

A reporting module, configured to report capability information to the network side device, where the capability information is used to indicate that the terminal supports downlink dynamic waveform switching.

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

Physical downlink shared channel PDSCH transmission dynamically authorized by DG scheduling;

Semi-persistently scheduled SPS-PDSCH transmission;

PDSCH transmission scheduled by RRC configuration;

4-step random access scheduled message 2MSG2 transmission or message 4MSG4 transmission;

2-step 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 following:

The first downlink control information DCI is used to instruct a specific terminal to perform downlink dynamic waveform switching;

The second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching; the second DCI is a group Group common DCI;

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 dynamic waveform switching.

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

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

Frequency domain resource allocation FDRA domain;

antenna port antenna port field;

Modulation and coding strategy MCS field;

Priority indication priority indicator field; wherein, the priority information indicated by the priority indicator field is used to indicate the downlink transmission waveform of the network side device.

Optionally, the FDRA field includes an N1 bit; wherein, the N1 bit is used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device; the N1 is a positive integer ;

or,

The FDRA field includes N2 bits, and the MCS field includes N3 bits; the N2 bits and the N3 bits are used to indicate that the network-side device has triggered downlink dynamic waveform switching or the downlink of the network-side device Transmission waveform; wherein, the N2 bit is used to indicate the resource allocation type, the N3 bit is used to indicate the MCS level information or the MCS table type information, the N2 is a positive integer, and the N3 is an integer.

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

Wherein, the N4 bit is used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device;

The N5 bit is used to indicate the antenna port configuration information corresponding to the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM waveform; the N4 and N5 are both positive integers.

Optionally, the rank information indicated by the antenna port field is used to indicate the downlink transmission waveform of the network side device; or,

The rank information indicated by the antenna port field and the MCS level information or MCS table type information indicated by the MCS field are used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device; or,

The MCS level information or MCS table type information indicated by the MCS field is used to indicate the downlink transmission waveform of the network side device.

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

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

or,

The additional new field or target field in the second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching.

Optionally, the first transmission module 602 is specifically used for any of the following:

In the case that the downlink transmission is non-DG scheduled downlink transmission, the terminal receives the downlink transmission scheduled by the control signaling based on the waveform determined by the control signaling on the transmission resource scheduled by the control signaling ; After the transmission resource scheduled by the control signaling, the terminal receives the non-DG scheduled downlink transmission based on the waveform determined by the control signaling;

In the case that the downlink transmission is non-DG scheduled downlink transmission, the terminal does not receive downlink data from the network side device on the transmission resources scheduled by the control signaling; After specifying the scheduled transmission resource, receive the non-DG scheduled downlink transmission based on the waveform determined by the control signaling.

Optionally, in the case that the downlink transmission is not scheduled by the DG, the control signaling is DCI activation or DCI retransmission.

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

Respectively instruct the terminal corresponding to each PDSCH to perform downlink dynamic waveform switching;

Respectively instruct each PDSCH group in the at least one cell or carrier to perform downlink dynamic waveform switching;

Instruct each cell or carrier to perform downlink dynamic waveform switching;

Respectively instruct each cell group or carrier group in the at least one cell or carrier to perform downlink dynamic waveform switching;

Uniformly instruct all PDSCHs to perform downlink dynamic waveform switching;

Respectively instruct each PDSCH group in the at least one PDSCH to perform downlink dynamic waveform switching.

Optionally, the third DCI is used 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:

distance information between the PDCCH carrying the third DCI and the PDSCH transmission scheduled by the third DCI;

Sequence information of resource configuration information for scheduling PDSCH in the third DCI;

Cell ID information used by the scrambling parameters of the PDCCH carrying the third DCI;

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

Fig. 7 is the second structural schematic diagram of the downlink transmission device provided by the embodiment of the present application. As shown in Fig. 7, the downlink transmission device 700 is applied to network side equipment, including:

The sending module 701 is configured to send control signaling to the terminal; wherein the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching;

The second transmission module 702 is configured to perform downlink transmission based on the waveform determined by the control signaling.

In the downlink transmission device provided in the embodiment of the present application, control signaling is sent to the terminal, and the terminal learns that the network-side device instructs the terminal to perform downlink dynamic waveform switching based on the control signaling, and then, the terminal receives the network-side device on the waveform determined by the control signaling. Downlink transmission for correct reception and demodulation, so as to realize downlink dynamic waveform switching and improve transmission performance.

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

The third DCI is used to instruct a terminal corresponding to at least one physical downlink shared channel PDSCH on at least one cell or carrier to perform downlink dynamic waveform switching.

All terminals with the same waveform transmit on the bandwidth of the same OFDM symbol;

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

Optionally, when the waveform determined by the control signaling is a discrete Fourier transform extended orthogonal frequency division multiplexing (DFT-S-OFDM) waveform, the DFT-S-OFDM waveform is generated in a manner that satisfies at least the following one item:

Virtual resource block to physical resource block VRB to PRB mapping does not enable interleave interleave;

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

The rate matching mode set rateMatchPatternToAddModList is not configured, or the rate matching indicator is not enabled;

Long-term evolution LTE to cell reference signal CRS mapping method lte-CRS-ToMatchAround is not configured;

In the case of enabling interleaving and/or enabling rate matching, the frequency domain resources configured by the network side device for downlink transmission do not overlap with interleaving resources and/or rate matching resources;

The number of frequency-domain resource allocations for downlink transmission configured by the network side device includes: an integer multiple of 2, 3 or 5; or an integer multiple close to 2, 3 or 5;

In the case where the DFT-S-OFDM waveform is generated in a segmented DFT manner, among the frequency domain resources configured by the network side device, the resources of the same terminal are continuous.

The downlink transmission apparatus in this embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or other devices other than the terminal. Exemplarily, the terminal may include, but not limited to, the types of terminal 11 listed above, and other devices may be servers, Network Attached Storage (NAS), etc., which are not specifically limited in this embodiment of the present application.

The downlink transmission device provided by the embodiment of the present application can realize each process realized by the method embodiments in FIG. 2 to FIG. 7 , and achieve the same technical effect. To avoid repetition, details are not repeated here.

Fig. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application. As shown in Fig. 8, the communication device 800 includes a processor 801 and a memory 802, and the memory 802 stores programs that can run on the processor 801 Or an instruction, for example, when the communication device 800 is a terminal, when the program or instruction is executed by the processor 801, each step of the above embodiment of the downlink transmission method can be implemented, and the same technical effect can be achieved. When the communication device 800 is a network-side device, when the program or instruction is executed by the processor 801, the steps of the above downlink transmission method embodiment can be achieved, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

The embodiment of the present application also provides a terminal, including a processor and a communication interface; wherein the communication interface is used to receive control signaling sent by a network side device; wherein the control signaling is used to instruct the terminal to perform downlink Dynamic waveform switching;

This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect.

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

Those skilled in the art can understand that the terminal 900 can also include a power supply (such as a battery) for supplying power to various components, and the power supply can be logically connected to the processor 910 through the power management system, so as to manage charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 9 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components, which will not be repeated here.

It should be understood that, in the embodiment of the present application, the input unit 904 may include a graphics processing unit (Graphics Processing Unit, GPU) 9041 and a microphone 9042, and the graphics processor 9041 is used in a video capture mode or an image capture mode by an image capture device ( Such as the image data of the still picture or video obtained by the camera) for processing. 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 . The touch panel 9071 is also called 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, physical keyboards, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, and joysticks, which will not be repeated here.

In the embodiment of the present application, the radio frequency unit 901 may transmit the downlink data from the network side device to the processor 910 for processing after receiving the downlink data; in addition, the radio frequency unit 901 may send the uplink data to the network side device. Generally, 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 can be used to store software programs or instructions as well as various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required by at least one function (such as a sound playing function, image playback function, etc.), etc. Furthermore, memory 909 may include volatile memory or nonvolatile memory, or, memory 909 may include both volatile and nonvolatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synch link DRAM , SLDRAM) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DRRAM). The memory 909 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

The processor 910 may include one or more processing units; optionally, the processor 910 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the foregoing modem processor may not be integrated into the processor 910 .

Wherein, the radio frequency unit 901 is configured to receive control signaling sent by a network side device; where the control signaling is used to instruct the terminal to perform 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.

The terminal provided in the embodiment of the present application receives the control signaling sent by the network-side device, and learns based on the control signaling that the network-side device instructs the terminal to perform downlink dynamic waveform switching, and then, the terminal receives the signal from the network-side device on the waveform determined by the control signaling. Downlink transmission for correct reception and demodulation, so as to realize downlink dynamic waveform switching and improve transmission performance.

The embodiment of the present application also provides a network side device, including a processor and a communication interface; wherein the communication interface is used to send control signaling to the terminal; wherein the control signaling is used to instruct the terminal to perform downlink dynamic Waveform switching: the processor is configured to perform downlink transmission based on the waveform determined by the control signaling.

The network-side device embodiment corresponds to the above-mentioned network-side device method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.

FIG. 10 is a schematic structural diagram of a network-side device provided by an embodiment of the present application. As shown in FIG. 10 , 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 the radio frequency device 1002 . In the uplink direction, the radio frequency device 1002 receives information through the antenna 1001, and sends the received information to the baseband device 1003 for processing. In the downlink direction, the baseband device 1003 processes the information to be sent and sends it to the radio frequency device 1002 , and the radio frequency device 1002 processes the received information and sends it out through the antenna 1001 .

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

The baseband device 1003, for example, may include at least one baseband board, on which a plurality of chips are arranged, as shown in FIG. The program executes the network device operations shown in the above method embodiments.

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 in the embodiment of the present invention further includes: instructions or programs stored in the memory 1005 and operable on the processor 1004, and the processor 1004 invokes the instructions or programs in the memory 1005 to execute the above-mentioned network-side device-side The downlink transmission method achieves the same technical effect, so in order to avoid repetition, it is not repeated here.

The embodiment of the present application also provides a downlink transmission system, including: a terminal and a network side device, the terminal can be used to perform the steps of the terminal side downlink transmission method as described above, and the network side device can be used to perform the above steps The steps of the downlink transmission method of the network side equipment.

The embodiment of the present application also provides a readable storage medium. The readable storage medium may be volatile or non-volatile. Programs or instructions are stored on the readable storage medium. The program Or, when the instruction is executed by the processor, each process of the above downlink transmission method embodiment can be realized, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

Wherein, the processor is the processor in the terminal described in the foregoing embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.

The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the above-mentioned downlink transmission method embodiment Each process can achieve the same technical effect, so in order to avoid repetition, it will not be repeated here.

It should be understood that the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.

The embodiment of the present application further provides a computer program/program product, the computer program/program product is stored in a non-transitory storage medium, and the computer program/program product is executed by at least one processor to realize the above-mentioned downlink transmission Each process of the method embodiment can achieve the same technical effect, and will not be repeated here to avoid repetition.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, 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.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of computer software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, etc.) , CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims

A downlink transmission method, comprising:

The terminal receives the control signaling sent by the network side device; wherein the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching;

The terminal receives the 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.
The method according to claim 1, wherein the control signaling includes at least one of the following:

Downlink dynamic waveform switching enable indication information, used to enable downlink dynamic waveform switching;

Downlink dynamic waveform switching indication information, used to indicate that the network side device has triggered downlink dynamic waveform switching;

The downlink waveform indication information is used to indicate the downlink transmission waveform of the network side device.
The method according to claim 1 or 2, wherein the method further comprises at least one of the following:

The terminal receives radio resource control RRC signaling sent by the network side device, the RRC signaling is used to enable downlink dynamic waveform switching; the terminal responds to the RRC signaling to enable downlink dynamic waveform switching;

The default configuration of the terminal is to enable downlink dynamic waveform switching;

The terminal reports capability information to the network side device, where the capability information is used to indicate that the terminal supports downlink dynamic waveform switching.
The method according to any one of claims 1-3, wherein the downlink data corresponds to at least one of the following transmissions:

Physical downlink shared channel PDSCH transmission dynamically authorized by DG scheduling;

Semi-persistently scheduled SPS-PDSCH transmission;

PDSCH transmission scheduled by RRC configuration;

4-step random access scheduled message 2 MSG2 transmission or message 4 MSG4 transmission;

2-step 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.
The method according to any one of claims 1-3, wherein the control signaling includes at least one of the following:

The first downlink control information DCI is used to instruct a specific terminal to perform downlink dynamic waveform switching;

The second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching; the second DCI is a group Group common DCI;

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 dynamic waveform switching.
The method according to claim 5, wherein the format type of the first DCI is used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device.
The method according to claim 5, wherein the additional new field or target field in the first DCI is used to instruct a specific terminal to perform downlink dynamic waveform switching.
The method according to claim 7, wherein the target field in the first DCI includes at least one of the following:

Frequency domain resource allocation FDRA domain;

antenna port antenna port field;

Modulation and coding strategy MCS field;

Priority indication priority indicator field; wherein, the priority information indicated by the priority indicator field is used to indicate the downlink transmission waveform of the network side device.
The method according to claim 8, wherein the FDRA field includes an N1 bit; wherein the N1 bit is used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device ; The N1 is a positive integer;

or,

The FDRA field includes N2 bits, and the MCS field includes N3 bits; the N2 bits and the N3 bits are used to indicate that the network-side device has triggered downlink dynamic waveform switching or the downlink of the network-side device Transmission waveform; wherein, the N2 bit is used to indicate the resource allocation type, the N3 bit is used to indicate the MCS level information or the MCS table type information, the N2 is a positive integer, and the N3 is an integer.
The method according to claim 8, wherein the antenna port domain includes N4 bits and/or N5 bits;

Wherein, the N4 bit is used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device;

The N5 bit is used to indicate the antenna port configuration information corresponding to the discrete Fourier transform extended orthogonal frequency division multiplexing DFT-S-OFDM waveform; the N4 and N5 are both positive integers.
The method according to claim 8, wherein the rank information indicated by the antenna port field is used to indicate the downlink transmission waveform of the network side device; or,

The rank information indicated by the antenna port field and the MCS level information or MCS table type information indicated by the MCS field are used to indicate that the network side device has triggered downlink dynamic waveform switching or the downlink transmission waveform of the network side device; or,

The MCS level information or MCS table type information indicated by the MCS field is used to indicate the downlink transmission waveform of the network side device.
The method according to claim 11, wherein the MCS table type information is carried in an extended bit in the MCS field, or in an M-bit LSB or MSB in the MCS field.
The method according to claim 5, wherein the scrambling parameter of the second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching;

or,

The additional new field or target field in the second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching.
The method according to any one of claims 1-3, wherein the receiving of downlink data from the network side device by the terminal based on the waveform determined by the control signaling includes any of the following:

In the case that the downlink transmission is non-DG scheduled downlink transmission, the terminal receives the downlink transmission scheduled by the control signaling based on the waveform determined by the control signaling on the transmission resource scheduled by the control signaling ; After the transmission resource scheduled by the control signaling, the terminal receives the non-DG scheduled downlink transmission based on the waveform determined by the control signaling;

In the case that the downlink transmission is non-DG scheduled downlink transmission, the terminal does not receive downlink data from the network side device on the transmission resources scheduled by the control signaling; After specifying the scheduled transmission resource, receive the non-DG scheduled downlink transmission based on the waveform determined by the control signaling.
The method according to any one of claims 1-3, wherein, when the downlink transmission is non-DG scheduled downlink transmission, the control signaling is DCI activation or DCI retransmission.
The method according to claim 5, wherein the third DCI is used for at least one of the following:

Respectively instruct the terminal corresponding to each PDSCH to perform downlink dynamic waveform switching;

Respectively instruct each PDSCH group in the at least one cell or carrier to perform downlink dynamic waveform switching;

Instruct each cell or carrier to perform downlink dynamic waveform switching;

Respectively instruct each cell group or carrier group in the at least one cell or carrier to perform downlink dynamic waveform switching;

Uniformly instruct all PDSCHs to perform downlink dynamic waveform switching;

Respectively instruct each PDSCH group in the at least one PDSCH to perform downlink dynamic waveform switching.
The method according to claim 5, wherein the third DCI is used 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:

distance information between the PDCCH carrying the third DCI and the PDSCH transmission scheduled by the third DCI;

Sequence information of resource configuration information for scheduling PDSCH in the third DCI;

Cell ID information used by the scrambling parameters of the PDCCH carrying the third DCI;

The cell ID used by the scrambling parameters of the PDCCH carrying the third DCI is primary cell ID or secondary cell ID information.
The method according to any one of claims 1-3, wherein the method further comprises any one of the following:

When the waveform determined by the control signaling does not match the resource allocation type of the terminal, the terminal uses the resource allocation type that matches the waveform determined by the control signaling to receive the downlink from the network side device data;

When the waveform determined by the control signaling does not match the resource allocation type of the terminal, the terminal does not expect the network side device to simultaneously configure the waveform determined by the control signaling and the resource allocation type;

In the case of enabling downlink dynamic waveform switching, the terminal uses a target resource allocation type to receive downlink data from the network side device; wherein, the target resource allocation type is a resource allocation type with continuous resources;

When the waveform determined by the control signaling does not match the MCS information of the terminal, the terminal does not expect the network side device to simultaneously configure the waveform determined by the control signaling and the MCS information;

If the waveform determined by the control signaling does not match the MCS information of the terminal, the terminal uses the MCS information that matches the waveform determined by the control signaling to receive downlink data from the network side device.
The method according to any one of claims 1-3, wherein the waveform determined by the terminal based on the control signaling does not perform downlink dynamic waveform switching, comprising:

If the waveform determined by the control signaling does not match the resource allocation type of the terminal, the terminal does not perform downlink dynamic waveform switching; or,

If the waveform determined by the control signaling does not match the MCS information of the terminal, the terminal does not perform downlink dynamic waveform switching.
A downlink transmission method, comprising:

The network side equipment sends control signaling to the terminal; wherein, the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching;

The network side device performs downlink transmission based on the waveform determined by the control signaling.
The method according to claim 20, wherein the control signaling includes at least one of the following:

Downlink dynamic waveform switching enable indication information, used to enable downlink dynamic waveform switching;

Downlink dynamic waveform switching indication information, used to indicate that the network side device has triggered downlink dynamic waveform switching;

The downlink waveform indication information is used to indicate the downlink transmission waveform of the network side device.
The method according to claim 20 or 21, wherein the control signaling includes at least one of the following:

The first downlink control information DCI is used to instruct a specific terminal to perform downlink dynamic waveform switching;

The second DCI is used to instruct a group of terminals to perform downlink dynamic waveform switching; the second DCI is a group Group common DCI;

The third DCI is used to instruct a terminal corresponding to at least one physical downlink shared channel PDSCH on at least one cell or carrier to perform downlink dynamic waveform switching.
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 when the target requirement is met; wherein the target requirement includes the following At least one of:

All terminals with the same waveform transmit on the bandwidth of the same OFDM symbol;

A waveform is transmitted on the bandwidth of the same OFDM symbol.
The method according to any one of claims 20-22, wherein, when the waveform determined by the control signaling is a discrete Fourier transform extended orthogonal frequency division multiplexing (DFT-S-OFDM) waveform, the The generation method of the DFT-S-OFDM waveform meets at least one of the following:

Virtual resource block to physical resource block VRB to PRB mapping does not enable interleave interleave;

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

The rate matching mode set rateMatchPatternToAddModList is not configured, or the rate matching indicator is not enabled;

Long-term evolution LTE to cell reference signal CRS mapping method lte-CRS-ToMatchAround is not configured;

In the case of enabling interleaving and/or enabling rate matching, the frequency domain resources configured by the network side device for downlink transmission do not overlap with interleaving resources and/or rate matching resources;

The number of frequency-domain resource allocations for downlink transmission configured by the network side device includes: an integer multiple of 2, 3 or 5; or an integer multiple close to 2, 3 or 5;

In the case where the DFT-S-OFDM waveform is generated in a segmented DFT manner, among the frequency domain resources configured by the network side device, the resources of the same terminal are continuous.
A downlink transmission device, comprising:

The receiving module is configured to receive the control signaling sent by the network side device; wherein, the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching;

The first transmission module 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.
A downlink transmission device, comprising:

A sending module, configured to send control signaling to the terminal; wherein the control signaling is used to instruct the terminal to perform downlink dynamic waveform switching;

The second transmission module is configured to perform downlink transmission based on the waveform determined by the control signaling.
A terminal, including a processor and a memory, the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the process described in any one of claims 1 to 19 is implemented. Steps of the downlink transmission method described above.
A network side device, comprising a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, any one of claims 20 to 24 can be realized. The steps of the downlink transmission method described in item.
A readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the downlink transmission method according to any one of claims 1 to 19 is realized, or the downlink transmission method according to any one of claims 1 to 19 is realized, or the The steps of the downlink transmission method described in any one of 20 to 24 are required.