Wireless communication method, network device and terminal device

Abstract

The embodiment of the present application provides a method, network device and terminal device for wireless communication, wherein the network device implicitly indicates a resource scheduling mode and / or a reference signal transmission mode through a downlink control information format DCI Format, thereby avoiding the control signaling overhead generated by the control signaling indication, and reducing the operation complexity and energy consumption of the terminal device. The method comprises: using a first DCI Format among a plurality of downlink control information formats DCI Format to send downlink control information DCI to a terminal device; and using a resource scheduling mode corresponding to the first DCI Format to transmit a data channel.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a wireless communication method, a network device, and a terminal device. Background Art

[0002] In the Long Term Evolution (LTE) system, resource scheduling is based on slot scheduling, and the unit of each resource scheduling is slot or subframe. In the New Radio (NR) system, resource scheduling can be based on slot scheduling or symbol scheduling. However, at this stage, network equipment (e.g., base stations) require additional indication information to indicate which specific method is used for resource scheduling, which will bring additional control signaling overhead, and also increase the blind detection complexity of terminal equipment searching for downlink control information (Downlink Control Information, DCI), and bring greater power consumption. Summary of the invention

[0003] The embodiments of the present application provide a method, a network device and a terminal device for wireless communication. The network device implicitly indicates a resource scheduling mode and / or a reference signal transmission mode through a downlink control information format DCI Format, thereby avoiding control signaling overhead generated by control signaling indication and reducing the operation complexity and energy consumption of the terminal device.

[0004] In a first aspect, an embodiment of the present application provides a method for wireless communication, including:

[0005] The downlink control information DCI is sent to the terminal device using a first DCI Format among multiple downlink control information formats DCI Format, wherein:

[0006] The multiple DCI Formats include a first type of DCI Format and a second type of DCI Format, the first type of DCI Format corresponds to a first resource scheduling mode, the second type of DCI Format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, the second resource scheduling mode indicates time domain resources in units of symbols, and the first DCI Format is the first type of DCI Format or the second type of DCI Format;

[0007] The data channel is transmitted using the resource scheduling mode corresponding to the first DCI Format.

[0008] Optionally, the network device may classify the downlink control information format DCI Format into a first type DCI Format and a second type DCI Format.

[0009] Therefore, in the wireless communication method of the embodiment of the present application, the network device indicates the time domain resources in units of time slots through the first type of DCI Format, and indicates the time domain resources in units of symbols through the second type of DCI Format. Thus, the network device can implicitly indicate the resource scheduling mode through the downlink control information format, avoiding the control signaling overhead generated by the control signaling indication, and reducing the operation complexity and energy consumption of the terminal device.

[0010] Optionally, in an implementation of the first aspect, the method further includes:

[0011] The reference signal of the data channel is transmitted using the reference signal mode corresponding to the first DCI Format, wherein:

[0012] The first type of DCI Format corresponds to a first reference signal mode, and the second type of DCI Format corresponds to a second reference signal mode; in the first reference signal mode, there is at least one reference signal located in a specific symbol of a time slot, and in the second reference signal mode, there is at least one reference signal located in a specific symbol in a group of symbols, and the group of symbols is a symbol used to transmit the data channel and its reference signal.

[0013] Therefore, in the wireless communication method of the embodiment of the present application, the network device indicates the existence of at least one reference signal located in a specific symbol of a time slot through the first type of DCI Format, and indicates the existence of at least one reference signal located in a specific symbol of a group of symbols through the second type of DCI Format. Thus, the network device can implicitly indicate the reference signal transmission mode through the downlink control information format, avoiding the control signaling overhead generated by the control signaling indication, and reducing the operation complexity and energy consumption of the terminal device.

[0014] Optionally, in an implementation manner of the first aspect, a specific symbol of the time slot is the third time domain symbol or the fourth time domain symbol of the time slot.

[0015] Optionally, in an implementation manner of the first aspect, a specific symbol in the group of symbols is the first symbol in the group of symbols.

[0016] Optionally, in an implementation manner of the first aspect, the reference signal is a demodulation reference signal DMRS.

[0017] Optionally, in an implementation manner of the first aspect, the using a first DCIFormat among multiple DCI Formats to send DCI to a terminal device includes:

[0018] The DCI is sent to the terminal device on the first resource using the first DCI Format, wherein:

[0019] If the first DCI Format is the first type of DCI Format, the first resource is a resource in units of time slots;

[0020] If the first DCI Format is the second type of DCI Format, the first resource is a resource in symbol units.

[0021] Optionally, in an implementation manner of the first aspect, the first resource is a control resource set or a search space for transmitting a physical downlink control channel.

[0022] In a second aspect, an embodiment of the present application provides a method for wireless communication, including:

[0023] Receive downlink control information DCI from a network device;

[0024] Determine the downlink control information format DCI Format of the DCI, where:

[0025] The DCI Format of the DCI is a first type DCI Format or a second type DCI Format, the first type DCI Format corresponds to a first resource scheduling mode, the second type DCI Format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, and the second resource scheduling mode indicates time domain resources in units of symbols;

[0026] According to the DCI Format of the DCI, a resource scheduling mode of a data channel corresponding to the DCI is determined.

[0027] Therefore, in the wireless communication method of the embodiment of the present application, the network device indicates the time domain resources in units of time slots through the first type of DCI Format, and indicates the time domain resources in units of symbols through the second type of DCI Format. Thus, the network device can implicitly indicate the resource scheduling mode through the downlink control information format, avoiding the control signaling overhead generated by the control signaling indication, and reducing the operation complexity and energy consumption of the terminal device.

[0028] Optionally, in an implementation manner of the second aspect, the method further includes:

[0029] According to the DCI Format of the DCI, a reference signal mode of the data channel is determined, wherein:

[0030] The first type of DCI Format corresponds to a first reference signal mode, the second type of DCI Format corresponds to a second reference signal mode, the first reference signal mode includes at least one reference signal located in a specific symbol in a time slot, and the second reference signal mode includes at least one reference signal located in a specific symbol in a group of symbols, where the group of symbols is used to transmit the data channel and its reference signal;

[0031] A reference signal position of the data channel is determined according to the reference signal pattern of the data channel.

[0032] Therefore, in the wireless communication method of the embodiment of the present application, the network device indicates the existence of at least one reference signal located in a specific symbol of a time slot through the first type of DCI Format, and indicates the existence of at least one reference signal located in a specific symbol of a group of symbols through the second type of DCI Format. Thus, the network device can implicitly indicate the reference signal transmission mode through the downlink control information format, avoiding the control signaling overhead generated by the control signaling indication, and reducing the operation complexity and energy consumption of the terminal device.

[0033] Optionally, in an implementation manner of the second aspect, a specific symbol of the time slot is the third time domain symbol or the fourth time domain symbol of the time slot.

[0034] Optionally, in an implementation manner of the second aspect, a specific symbol in the group of symbols is the first symbol in the group of symbols.

[0035] Optionally, in an implementation manner of the second aspect, the reference signal is a demodulation reference signal DMRS.

[0036] Optionally, in an implementation manner of the second aspect, the receiving the DCI from the network device includes:

[0037] The DCI is received from the network device on a first resource, wherein if the first resource is a resource in units of time slots, the DCI Format is the first type of DCI Format; if the first resource is a resource in units of symbols, the DCI Format is the second type of DCI Format;

[0038] The DCI Format of the DCI is determined, including:

[0039] A DCI Format of the DCI is determined according to the first resource.

[0040] Therefore, in the wireless communication method of the embodiment of the present application, the terminal device can determine the DCI Format corresponding to the DCI through the granularity of the first resource in the time domain, and then determine the resource scheduling mode and / or reference signal transmission mode according to the type of DCI Format, thereby reducing the operating complexity and energy consumption of the terminal device.

[0041] Optionally, in an implementation manner of the second aspect, the first resource is a control resource set or a search space for transmitting a physical downlink control channel.

[0042] In a third aspect, an embodiment of the present application provides a network device that can execute a module or unit of the method in the first aspect or any optional implementation of the first aspect.

[0043] In a fourth aspect, an embodiment of the present application provides a terminal device that can execute a module or unit of the method in the second aspect or any optional implementation of the second aspect.

[0044] In a fifth aspect, a network device is provided, the network device comprising a processor, a memory, and a communication interface. The processor is connected to the memory and the communication interface. The memory is used to store instructions, the processor is used to execute the instructions, and the communication interface is used to communicate with other network elements under the control of the processor. When the processor executes the instructions stored in the memory, the execution causes the processor to execute the method in the first aspect or any possible implementation of the first aspect.

[0045] In a sixth aspect, a terminal device is provided, the terminal device comprising a processor, a memory, and a communication interface. The processor is connected to the memory and the communication interface. The memory is used to store instructions, the processor is used to execute the instructions, and the communication interface is used to communicate with other network elements under the control of the processor. When the processor executes the instructions stored in the memory, the execution causes the processor to execute the method in the second aspect or any possible implementation of the second aspect.

[0046] In a seventh aspect, a computer storage medium is provided, in which a program code is stored, and the program code is used to instruct a computer to execute instructions of the method in the above-mentioned first aspect or any possible implementation manner of the first aspect.

[0047] In an eighth aspect, a computer storage medium is provided, in which a program code is stored, and the program code is used to instruct a computer to execute instructions of the method in the above-mentioned second aspect or any possible implementation of the second aspect.

[0048] In a ninth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the methods described in the above aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 The wireless communication system to which the embodiment of the present application is applied is shown.

[0050] Figure 2 It is a schematic flowchart of a wireless communication method according to an embodiment of the present application.

[0051] Figure 3 It is a schematic flowchart of another wireless communication method according to an embodiment of the present application.

[0052] Figure 4 It is a schematic diagram of a data transmission channel according to an embodiment of the present application.

[0053] Figure 5 It is a schematic diagram of another data transmission channel according to an embodiment of the present application.

[0054] Figure 6 It is a schematic block diagram of a network device according to an embodiment of the present application.

[0055] Figure 7 It is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0056] Figure 8 A schematic block diagram of a wireless communication device provided in an embodiment of the present application is shown.

[0057] Fig. 9 is a schematic structural diagram of a system chip according to an embodiment of the present application. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0059] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system or future 5G system.

[0060] Figure 1 A wireless communication system 100 applied in an embodiment of the present application is shown. The wireless communication system 100 may include a network device 110. The network device 110 may be a device that communicates with a terminal device. The network device 110 may provide communication coverage for a specific geographical area, and may communicate with a terminal device (e.g., UE) located in the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station (EvolutionalNode B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network side device in a future 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

[0061] The wireless communication system 100 also includes at least one terminal device 120 located within the coverage of the network device 110. The terminal device 120 may be mobile or fixed. Optionally, the terminal device 120 may refer to an access terminal, a user equipment (UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network, or a terminal device in a future evolved PLMN, etc.

[0062] Optionally, terminal devices 120 may perform device-to-device (D2D) communication with each other.

[0063] Optionally, the 5G system or network may also be referred to as a New Radio (NR) system or network.

[0064] Figure 1 One network device and two terminal devices are shown exemplarily. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0065] Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0066] In the 5G NR standard, two scheduling modes can be supported: slot-based scheduling and symbol-based scheduling (non-slot-based scheduling). The so-called non-slot-based scheduling is to reduce the time domain granularity of scheduling to orthogonal frequency division multiplexing (OFDM) symbols. This mode can achieve more flexible time domain resource allocation. Slot-based scheduling and non-slot-based scheduling have different ways of determining the time domain position of the demodulation reference signal (DMRS): the first column of DMRS in the slot-based scheduling mode is located at the 3rd or 4th symbol of the slot; the first column of DMRS in the non-slot-based scheduling mode is located at the first symbol of the data channel.

[0067] In addition, the base station will indicate which of the above two scheduling modes is used to schedule the terminal.

[0068] Optionally, in an embodiment of the present application, the network device may implicitly indicate a resource scheduling mode and / or a reference signal transmission mode through a downlink control information format (Downlink Control Information Format, DCI Format).

[0069] For example, all DCI Formats are divided into a first type DCI Format and a second type DCI Format, the first type DCI Format corresponds to a first resource scheduling mode, the second type DCI Format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, and the second resource scheduling mode indicates time domain resources in units of symbols.

[0070] For example, in the R9 version of the protocol, the following DCIs are defined: DCI 0, DCI 1, DCI 1A, DCI 1B, DCI 1C, DCI 1D, DCI 2, DCI 2A, DCI 2B, DCI 3, DCI 3A. Among them, DCI 0, DCI 3, DCI 3A are DCI types related to the Physical Uplink Shared Channel (PUSCH) or the Physical Uplink Control Channel (PUCCH), while DCI 1, DCI 1A, DCI 1B, DCI 1C, DCI 1D, DCI 2, DCI 2A, DCI 2B are DCI types for the Physical Downlink Shared Channel (PDSCH). At this time, DCI 0, DCI 3, and DCI 3A can be classified as the first type of DCI Format, and DCI 1, DCI 1A, DCI 1B, DCI 1C, DCI 1D, DCI 2, DCI 2A, and DCI 2B can be classified as the second type of DCI Format.

[0071] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0072] Figure 2 FIG. 2 is a schematic flow chart of a wireless communication method 200 according to an embodiment of the present application. Figure 2 As shown, the method 200 may be performed by a network device, which may be Figure 1 The network device shown in FIG. 200 , the terminal device in the method 200 may be as follows Figure 1 For the terminal device shown, the method 200 includes the following contents.

[0073] 210. The network device uses a first DCI format among multiple downlink control information DCI formats to send DCI to the terminal device.

[0074] Optionally, the multiple DCI formats include a first type of DCI format and a second type of DCI format, the first type of DCI format corresponds to a first resource scheduling mode, the second type of DCI format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, and the second resource scheduling mode indicates time domain resources in units of symbols.

[0075] Optionally, the first DCI format is the first type DCI format or the second type DCI format.

[0076] 220. The network device adopts the resource scheduling mode corresponding to the first DCI format to transmit the data channel.

[0077] Optionally, after receiving the DCI, the terminal device may determine a resource scheduling mode according to the format of the DCI, and further, may use the time domain resources corresponding to the resource scheduling mode determined according to the format of the DCI to accurately transmit the data channel.

[0078] Optionally, the method 200 further includes:

[0079] The network device transmits a reference signal of the data channel using a reference signal mode corresponding to the first DCI format, wherein:

[0080] The first type of DCI format corresponds to a first reference signal mode, and the second type of DCI format corresponds to a second reference signal mode; in the first reference signal mode, there is at least one reference signal located in a specific symbol of a time slot, and in the second reference signal mode, there is at least one reference signal located in a specific symbol of a group of symbols, and the group of symbols is used to transmit the data channel and its reference signal.

[0081] Optionally, the reference signal is a demodulation reference signal (Demodulation Reference Signal, DMRS).

[0082] Optionally, a specific symbol of the time slot is the third time domain symbol or the fourth time domain symbol of the time slot.

[0083] Optionally, a specific symbol in the group of symbols is the first symbol in the group of symbols.

[0084] Optionally, the one specific symbol is the symbol position of the first column DMRS.

[0085] Optionally, for a time slot-based scheduling method, the first column of DMRS is located at the 3rd or 4th symbol of the slot; for a symbol-based scheduling method, the first column of DMRS is located at the first symbol of the data channel, that is, the first symbol in the group of symbols.

[0086] Optionally, the using a first DCI format among multiple DCI formats to send DCI to a terminal device includes:

[0087] The DCI is sent to the terminal device on the first resource using the first DCI format, wherein:

[0088] If the first DCI format is the first type of DCI format, the first resource is a resource in units of time slots;

[0089] If the first DCI format is the second type of DCI format, the first resource is a resource in symbols.

[0090] Optionally, the terminal device may determine the DCI format according to the granularity of the first resource. For example, if the granularity of the first resource is a time slot, the DCI format is a first type DCI format; if the granularity of the first resource is a symbol, the DCI format is a second type DCI format.

[0091] Optionally, the first resource is a control resource set or a search space for transmitting a physical downlink control channel.

[0092] Therefore, in the wireless communication method of the embodiment of the present application, the network device indicates time domain resources in units of time slots through the first type of DCI format indication, and indicates time domain resources in units of symbols through the second type of DCI format indication. Thus, the network device can implicitly indicate the resource scheduling mode through the downlink control information format, avoiding the control signaling overhead generated by the control signaling indication, and reducing the operating complexity and energy consumption of the terminal device.

[0093] Furthermore, the network device indicates the existence of at least one reference signal located in a specific symbol in a time slot through a first type of DCI Format, and indicates the existence of at least one reference signal located in a specific symbol in a group of symbols through a second type of DCI Format. Thus, the network device can implicitly indicate the reference signal transmission mode through the downlink control information format, thereby avoiding the control signaling overhead generated by control signaling indication and reducing the operating complexity and energy consumption of the terminal device.

[0094] Figure 3 FIG. 3 is a schematic flow chart of a wireless communication method 300 according to an embodiment of the present application. Figure 3 As shown, the method 300 may be executed by a terminal device, which may be as shown in FIG. Figure 1 The terminal device shown in FIG. 3 , the network device in the method 300 may be as follows Figure 1 For the network device shown, the method 300 includes the following contents.

[0095] 310. The terminal device receives downlink control information DCI from the network device.

[0096] 320. The terminal device determines the DCI format of the DCI.

[0097] Optionally, the DCI format of the DCI is a first type DCI format or a second type DCI format.

[0098] Optionally, the first type of DCI format corresponds to a first resource scheduling mode, and the second type of DCI format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, and the second resource scheduling mode indicates time domain resources in units of symbols.

[0099] 330. The terminal device determines the resource scheduling mode of the data channel corresponding to the DCI according to the DCI format of the DCI.

[0100] Optionally, the method 300 further includes:

[0101] The terminal device determines the reference signal mode of the data channel according to the DCI format of the DCI, wherein:

[0102] The first type of DCI format corresponds to a first reference signal mode, the second type of DCI format corresponds to a second reference signal mode, the first reference signal mode includes at least one reference signal located in a specific symbol of a time slot, and the second reference signal mode includes at least one reference signal located in a specific symbol of a group of symbols, where the group of symbols is used to transmit the data channel and its reference signal;

[0103] The terminal device determines the reference signal position of the data channel according to the reference signal mode of the data channel.

[0104] Optionally, a specific symbol of the time slot is the third time domain symbol or the fourth time domain symbol of the time slot.

[0105] Optionally, a specific symbol in the group of symbols is the first symbol in the group of symbols.

[0106] Optionally, the reference signal is a demodulation reference signal DMRS.

[0107] Optionally, the receiving DCI from the network device includes:

[0108] Receiving the DCI from the network device on a first resource, wherein if the first resource is a resource in units of time slots, the DCI format is the first type of DCI format; if the first resource is a resource in units of symbols, the DCI format is the second type of DCI format;

[0109] The determining of the DCI format of the DCI includes:

[0110] The terminal device determines the DCI format of the DCI based on the first resource.

[0111] Optionally, the first resource is a control resource set (CORESET) or a search space (Search Space) for transmitting a physical downlink control channel.

[0112] Alternatively, if Figure 4 As shown, as an embodiment, the terminal device can determine the DCI Format to search according to the period of the first resource (control resource set or search space), and then determine the data channel scheduling mode and DMRS symbol position according to the DCI Format.

[0113] Specifically, Figure 4 As shown:

[0114] In 410, the terminal device receives a control resource set / search space configuration sent by a network device.

[0115] Optionally, the control resource set / search space configuration may be configured with a time slot as the granularity or with a symbol as the granularity.

[0116] In 421, if the control resource set / search space is configured with time slot as the granularity, the terminal device searches for DCI in the control resource set / search space with the format of the first type of DCI format.

[0117] In 431, the terminal device receives DCI in the first type DCI format.

[0118] In 441, the terminal device determines that the data channel adopts the first resource scheduling mode and the first reference signal mode.

[0119] In 451, the terminal device determines data channel resources and reference signal positions based on the first resource scheduling mode and the first reference signal mode.

[0120] In 461, the terminal device receives or sends a data channel.

[0121] In 422, if the control resource set / search space is configured with symbol granularity, the terminal device searches for DCI in the control resource set / search space with the format of the second type of DCI format.

[0122] In 432, the terminal device receives DCI in the second type DCI format.

[0123] In 442, the terminal device determines that the data channel adopts the second resource scheduling mode and the second reference signal mode.

[0124] In 452, the terminal device determines data channel resources and reference signal positions based on the second resource scheduling mode and the second reference signal mode.

[0125] In 462, the terminal device receives or sends a data channel.

[0126] Alternatively, if Figure 5 As shown, as an embodiment, the terminal device can determine the data channel scheduling mode and the DMRS symbol position according to the DCI Format.

[0127] Specifically, Figure 5 As shown:

[0128] In 510, the terminal device receives a control resource set / search space configuration sent by a network device.

[0129] In 520, the terminal device searches for DCI in the control resource set / search space.

[0130] In 531, if the format of the searched DCI is the first type of DCI format, the terminal device receives the DCI in the first type of DCI format.

[0131] In 541, the terminal device determines that the data channel adopts the first resource scheduling mode and the first reference signal mode.

[0132] In 551, the terminal device determines data channel resources and reference signal positions based on the first resource scheduling mode and the first reference signal mode.

[0133] In 561, the terminal device receives or sends a data channel.

[0134] In 532, if the format of the searched DCI is the second type DCI format, the terminal device receives the DCI in the second type DCI format.

[0135] In 542, the terminal device determines that the data channel adopts the second resource scheduling mode and the second reference signal mode.

[0136] In 552, the terminal device determines data channel resources and reference signal positions based on the second resource scheduling mode and the second reference signal mode.

[0137] In 562, the terminal device receives or sends a data channel.

[0138] It should be understood that the steps in the wireless communication method 300 may refer to the description of the corresponding steps in the wireless communication method 200, and for the sake of brevity, they will not be repeated here.

[0139] Therefore, in the wireless communication method of the embodiment of the present application, the network device indicates time domain resources in units of time slots through the first type of DCI format indication, and indicates time domain resources in units of symbols through the second type of DCI format indication. Thus, the network device can implicitly indicate the resource scheduling mode through the downlink control information format, avoiding the control signaling overhead generated by the control signaling indication, and reducing the operating complexity and energy consumption of the terminal device.

[0140] Furthermore, the network device indicates the existence of at least one reference signal located in a specific symbol in a time slot through a first type of DCI format, and indicates the existence of at least one reference signal located in a specific symbol in a group of symbols through a second type of DCI format. Thus, the network device can implicitly indicate the reference signal transmission mode through the downlink control information format, thereby avoiding the control signaling overhead generated by control signaling indication, and reducing the operating complexity and energy consumption of the terminal device.

[0141] Furthermore, the terminal device may determine the DCIFormat corresponding to the DCI according to the granularity of the first resource in the time domain, and further determine the resource scheduling mode and / or reference signal transmission mode according to the type of the DCI Format.

[0142] Figure 6 is a schematic block diagram of a network device 600 according to an embodiment of the present application. Figure 6 As shown, the network device 600 includes:

[0143] The transceiver unit 610 is configured to send a DCI to a terminal device using a first DCI format among multiple downlink control information DCI formats, wherein:

[0144] The multiple DCI formats include a first type of DCI format and a second type of DCI format, the first type of DCI format corresponds to a first resource scheduling mode, the second type of DCI format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, the second resource scheduling mode indicates time domain resources in units of symbols, and the first DCI format is the first type of DCI format or the second type of DCI format;

[0145] The transceiver unit 610 is further configured to transmit a data channel using a resource scheduling mode corresponding to the first DCI format.

[0146] Optionally, the transceiver unit 610 is further configured to transmit a reference signal of the data channel using a reference signal mode corresponding to the first DCI format, wherein:

[0147] The first type of DCI format corresponds to a first reference signal mode, and the second type of DCI format corresponds to a second reference signal mode; in the first reference signal mode, there is at least one reference signal located in a specific symbol of a time slot, and in the second reference signal mode, there is at least one reference signal located in a specific symbol of a group of symbols, and the group of symbols is used to transmit the data channel and its reference signal.

[0148] Optionally, a specific symbol of the time slot is the third time domain symbol or the fourth time domain symbol of the time slot.

[0149] Optionally, a specific symbol in the group of symbols is the first symbol in the group of symbols.

[0150] Optionally, the reference signal is a demodulation reference signal DMRS.

[0151] Optionally, the transceiver unit 610 is specifically configured to:

[0152] The DCI is sent to the terminal device on the first resource using the first DCI format, wherein:

[0153] If the first DCI format is the first type of DCI format, the first resource is a resource in units of time slots;

[0154] If the first DCI format is the second type of DCI format, the first resource is a resource in symbols.

[0155] Optionally, the first resource is a control resource set or a search space for transmitting a physical downlink control channel.

[0156] It should be understood that the network device 600 according to the embodiment of the present application may correspond to the network device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the network device 600 are respectively to implement Figure 2 For the sake of brevity, the corresponding processes of the network device in the method 200 are not described in detail here.

[0157] Figure 7 is a schematic block diagram of a terminal device 700 according to an embodiment of the present application. Figure 7 As shown, the terminal device 700 includes:

[0158] The receiving unit 710 is configured to receive downlink control information DCI from a network device;

[0159] The processing unit 720 is configured to determine a DCI format of the DCI, wherein:

[0160] The DCI format of the DCI is a first type DCI format or a second type DCI format, the first type DCI format corresponds to a first resource scheduling mode, the second type DCI format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, and the second resource scheduling mode indicates time domain resources in units of symbols;

[0161] The processing unit 720 is further configured to determine a resource scheduling mode of a data channel corresponding to the DCI according to a DCI format of the DCI.

[0162] Optionally, the processing unit 720 is further configured to determine a reference signal mode of the data channel according to a DCI format of the DCI, wherein:

[0163] The first type of DCI format corresponds to a first reference signal mode, the second type of DCI format corresponds to a second reference signal mode, the first reference signal mode includes at least one reference signal located in a specific symbol of a time slot, and the second reference signal mode includes at least one reference signal located in a specific symbol of a group of symbols, where the group of symbols is used to transmit the data channel and its reference signal;

[0164] The processing unit 720 is further configured to determine a reference signal position of the data channel according to the reference signal pattern of the data channel.

[0165] Optionally, a specific symbol of the time slot is the third time domain symbol or the fourth time domain symbol of the time slot.

[0166] Optionally, a specific symbol in the group of symbols is the first symbol in the group of symbols.

[0167] Optionally, the reference signal is a demodulation reference signal DMRS.

[0168] Optionally, the receiving unit 710 is further configured to receive the DCI from the network device on a first resource, wherein if the first resource is a resource in units of time slots, the DCI format is the first type of DCI format; if the first resource is a resource in units of symbols, the DCI format is the second type of DCI format;

[0169] The processing unit 720 is further configured to determine a DCI format of the DCI according to the first resource.

[0170] Optionally, the first resource is a control resource set or a search space for transmitting a physical downlink control channel.

[0171] It should be understood that the terminal device 700 according to the embodiment of the present application may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and / or functions of each unit in the terminal device 700 are respectively to implement Figure 3 For the sake of brevity, the corresponding process of the terminal device in the method 300 is not repeated here.

[0172] Figure 8 A schematic block diagram of a wireless communication device 800 provided in an embodiment of the present application is shown, and the device 800 includes:

[0173] A memory 810, used for storing a program, the program including codes;

[0174] A transceiver 820, used for communicating with other devices;

[0175] The processor 830 is configured to execute the program code in the memory 810 .

[0176] Optionally, when the code is executed, the processor 830 may implement Figure 2 For the sake of brevity, the various operations performed by the network device in the method 200 are not described here. At this time, the device 800 can be an access network device or a core network device. The transceiver 820 is used to perform specific signal transmission and reception under the drive of the processor 830.

[0177] Optionally, when the code is executed, the processor 830 may also implement Figure 3 For the sake of brevity, the various operations performed by the terminal device in the method 300 are not described here. At this time, the device 800 can be a terminal device, such as a mobile phone.

[0178] It should be understood that in the embodiment of the present application, the processor 830 may be a central processing unit (CPU), and the processor 830 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0179] The memory 810 may include a read-only memory and a random access memory, and provide instructions and data to the processor 830. A portion of the memory 810 may also include a non-volatile random access memory. For example, the memory 810 may also store information on the device type.

[0180] The transceiver 820 may be used to implement signal transmission and reception functions, such as frequency modulation and demodulation functions or up-conversion and down-conversion functions.

[0181] In the implementation process, at least one step of the above method can be completed by the integrated logic circuit of the hardware in the processor 830, or the integrated logic circuit can complete the at least one step under the instruction drive of the software form. Therefore, the wireless communication device 800 can be a chip or a chipset. The steps of the method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor to be executed, or a combination of hardware and software modules in the processor to be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor 830 reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.

[0182] Fig. 9 is a schematic structural diagram of a system chip 900 according to an embodiment of the present application. Fig. 9 The system chip 900 includes an input interface 901 , an output interface 902 , a processor 903 and a memory 904 , which can be connected via an internal communication connection line. The processor 903 is used to execute the code in the memory 904 .

[0183] Optionally, when the code is executed, the processor 903 implements the method executed by the network device in the method embodiment. For the sake of brevity, it will not be described here.

[0184] Optionally, when the code is executed, the processor 903 implements the method executed by the terminal device in the method embodiment. For the sake of brevity, it will not be described here.

[0185] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0186] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0187] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0188] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0189] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0190] If this function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0191] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, characterized in that: include: The DCI is sent to the terminal device using a first DCI format among multiple downlink control information DCI formats, wherein: The multiple DCI formats include a first type of DCI format and a second type of DCI format, the first type of DCI format corresponds to a first resource scheduling mode, the second type of DCI format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, the second resource scheduling mode indicates time domain resources in units of symbols, and the first DCI format is the first type of DCI format or the second type of DCI format; The data channel is transmitted using the resource scheduling mode corresponding to the first DCI format, The method further comprises: The reference signal of the data channel is transmitted using the reference signal mode corresponding to the first DCI format, wherein: The first type of DCI format corresponds to a first reference signal mode, and the second type of DCI format corresponds to a second reference signal mode; in the first reference signal mode, there is at least one reference signal located in a specific symbol of a time slot, and in the second reference signal mode, there is at least one reference signal located in a specific symbol of a group of symbols, and the group of symbols is a symbol used to transmit the data channel and its reference signal.

2. The method according to claim 1, characterized in that A specific symbol of the time slot is the third time domain symbol or the fourth time domain symbol of the time slot.

3. The method according to claim 1 or 2, characterized in that: A particular symbol in the set of symbols is a first symbol in the set of symbols.

4. The method according to claim 1 or 2, characterized in that: The using a first DCI format among multiple DCI formats to send DCI to the terminal device includes: The DCI is sent to the terminal device on a first resource using the first DCI format, wherein: If the first DCI format is the first type of DCI format, the first resource is a resource in time slots; If the first DCI format is the second type of DCI format, the first resource is a resource in symbols.

5. A wireless communication method, characterized in that: include: Receive downlink control information DCI from a network device; Determine a DCI format of the DCI, wherein: The DCI format of the DCI is a first type DCI format or a second type DCI format, the first type DCI format corresponds to a first resource scheduling mode, the second type DCI format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, and the second resource scheduling mode indicates time domain resources in units of symbols; Determine, according to the DCI format of the DCI, a resource scheduling mode of a data channel corresponding to the DCI, According to the DCI format of the DCI, a reference signal mode of the data channel is determined, wherein: The first type of DCI format corresponds to a first reference signal mode, the second type of DCI format corresponds to a second reference signal mode, the first reference signal mode includes at least one reference signal located in a specific symbol of a time slot, and the second reference signal mode includes at least one reference signal located in a specific symbol of a group of symbols, where the group of symbols is used to transmit the data channel and the reference signal of the data channel; A reference signal position of the data channel is determined according to the reference signal pattern of the data channel.

6. The method according to claim 5, characterized in that The reference signal is a demodulation reference signal DMRS.

7. The method according to claim 5 or 6, characterized in that: The receiving DCI from the network device includes: Receiving the DCI from the network device on a first resource, wherein if the first resource is a resource in units of time slots, the DCI format is the first type of DCI format; if the first resource is a resource in units of symbols, the DCI format is the second type of DCI format; The determining the DCI format of the DCI includes: Determine a DCI format of the DCI according to the first resource.

8. The method according to claim 7, characterized in that The first resource is a control resource set or a search space for transmitting a physical downlink control channel.

9. A network device, characterized in that: include: A transceiver unit is used to send DCI to a terminal device using a first DCI format among multiple downlink control information DCI formats, wherein: The multiple DCI formats include a first type of DCI format and a second type of DCI format, the first type of DCI format corresponds to a first resource scheduling mode, the second type of DCI format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, the second resource scheduling mode indicates time domain resources in units of symbols, and the first DCI format is the first type of DCI format or the second type of DCI format; The transceiver unit is further configured to transmit a data channel using a resource scheduling mode corresponding to the first DCI format, The transceiver unit is further configured to transmit a reference signal of the data channel using a reference signal mode corresponding to the first DCI format, wherein: The first type of DCI format corresponds to a first reference signal mode, and the second type of DCI format corresponds to a second reference signal mode; in the first reference signal mode, there is at least one reference signal located in a specific symbol of a time slot, and in the second reference signal mode, there is at least one reference signal located in a specific symbol of a group of symbols, and the group of symbols is a symbol used to transmit the data channel and its reference signal.

10. The network device according to claim 9, characterized in that: The transceiver unit is specifically used for: The DCI is sent to the terminal device on a first resource using the first DCI format, wherein: If the first DCI format is the first type of DCI format, the first resource is a resource in time slots; If the first DCI format is the second type of DCI format, the first resource is a resource in symbols.

11. A terminal device, characterized in that: include: A receiving unit, configured to receive downlink control information DCI from a network device; A processing unit, configured to determine a DCI format of the DCI, wherein: The DCI format of the DCI is a first type DCI format or a second type DCI format, the first type DCI format corresponds to a first resource scheduling mode, the second type DCI format corresponds to a second resource scheduling mode, the first resource scheduling mode indicates time domain resources in units of time slots, and the second resource scheduling mode indicates time domain resources in units of symbols; The processing unit is further configured to determine a resource scheduling mode of a data channel corresponding to the DCI according to a DCI format of the DCI, The processing unit is further configured to determine a reference signal mode of the data channel according to a DCI format of the DCI, wherein: The first type of DCI format corresponds to a first reference signal mode, the second type of DCI format corresponds to a second reference signal mode, the first reference signal mode includes at least one reference signal located in a specific symbol of a time slot, and the second reference signal mode includes at least one reference signal located in a specific symbol of a group of symbols, where the group of symbols is used to transmit the data channel and the reference signal of the data channel; The processing unit is further used to determine the reference signal position of the data channel according to the reference signal mode of the data channel.

12. The terminal device according to claim 11, characterized in that: The receiving unit is further configured to receive the DCI from the network device on a first resource, wherein if the first resource is a resource in units of time slots, the DCI format is the first type of DCI format; if the first resource is a resource in units of symbols, the DCI format is the second type of DCI format; The processing unit is further used to determine a DCI format of the DCI according to the first resource.

13. A network device, characterized in that: It comprises a memory, a processor, an input interface and an output interface, wherein the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory. When the processor executes the instructions stored in the memory, the execution causes the network device to execute the method as described in any one of claims 1-4.

14. A terminal device, characterized in that: It includes a memory, a processor, an input interface and an output interface, wherein the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory. When the processor executes the instructions stored in the memory, the execution causes the terminal device to execute the method as described in any one of claims 5-8.

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