Wireless communication method, network equipment and terminal equipment

Abstract

Provided are a wireless communication method, a network device and a terminal device, the network device implicitly indicating a resource scheduling mode and / or a reference signal transmission mode through a downlink control information format DCI Format, avoiding control signaling overhead generated by control signaling indication, and reducing operation complexity and energy consumption of the terminal device. The method comprises the following steps: sending downlink control information (DCI) to a terminal device by adopting a first DCI Format in a plurality of DCI Formats (DCI) Formats; and transmitting a data channel by adopting a resource scheduling mode corresponding to the first DCI Format.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 201780093810.8, with the invention title of "Method, Network Device and Terminal Device for Wireless Communication", which is the national stage entry of PCT International Patent Application PCT / CN2017 / 097256 with the filing date of August 11, 2017. Technical Field

[0002] This application relates to the field of communications, and more particularly, to a method, network device, and terminal device for wireless communication. Background Art

[0003] In a Long Term Evolution (LTE) system, resource scheduling is slot-based scheduling, and the unit of each resource scheduling is a slot or a subframe. In a New Radio (NR) system, resource scheduling can be slot-based scheduling or symbol-based scheduling. However, at present, a network device (e.g., a base station) needs additional indication information to indicate which specific method to use for resource scheduling. As a result, it will bring additional control signaling overhead, increase the blind detection complexity of a terminal device for searching for Downlink Control Information (DCI), and cause greater power consumption. Summary of the Invention

[0004] Embodiments of this application provide a method, network device, and 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, avoiding the control signaling overhead caused by indicating through control signaling, and reducing the operation complexity and energy consumption of the terminal device.

[0005] In a first aspect, embodiments of this application provide a method for wireless communication, including:

[0006] Sending downlink control information DCI to a terminal device by using a first DCI Format among multiple downlink control information formats DCI Format, where

[0007] 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, 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. The first DCI Format is the first type of DCI Format or the second type of DCI Format;

[0008] Transmit a data channel using the resource scheduling mode corresponding to the first DCI Format.

[0009] Optionally, a network device may divide a downlink control information format DCI Format into a first type of DCI Format and a second type of DCI Format.

[0010] Therefore, in the method for wireless communication according to an embodiment of the present application, the network device indicates time-domain resources in units of time slots through the first type of DCI Format, and indicates time-domain resources in units of symbols through the second type of DCI Format. Thus, the network device can implicitly indicate a resource scheduling mode through the downlink control information format, avoiding control signaling overhead caused by indicating through control signaling, and reducing the operation complexity and power consumption of the terminal device.

[0011] Optionally, in an implementation manner of the first aspect, the method further includes:

[0012] Transmit a reference signal of the data channel using the reference signal mode corresponding to the first DCI Format, where

[0013] 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; there is at least one reference signal in a specific symbol of a time slot in the first reference signal mode, and there is at least one reference signal in a specific symbol of a group of symbols in the second reference signal mode, and the group of symbols is the symbols used to transmit the data channel and its reference signal.

[0014] Therefore, in the method for wireless communication according to an embodiment of the present application, the network device indicates that there is at least one reference signal in a specific symbol of a time slot through the first type of DCI Format, and indicates that there is at least one reference signal in a specific symbol of a group of symbols through the second type of DCI Format. Thus, the network device can implicitly indicate a reference signal transmission mode through the downlink control information format, avoiding control signaling overhead caused by indicating through control signaling, and reducing the operation complexity and power consumption of the terminal device.

[0015] Optionally, in an implementation 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.

[0016] Optionally, in an implementation of the first aspect, a specific symbol of the set of symbols is the first symbol of the set of symbols.

[0017] Optionally, in an implementation of the first aspect, the reference signal is a demodulation reference signal DMRS.

[0018] Optionally, in an implementation of the first aspect, the DCI is sent to the terminal device by using a first DCI Format among multiple DCI Formats, including:

[0019] Sending the DCI to the terminal device on a first resource by using the first DCI Format, where

[0020] if the first DCI Format is the first type of DCI Format, the first resource is a resource in units of time slots;

[0021] if the first DCI Format is the second type of DCI Format, the first resource is a resource in units of symbols.

[0022] Optionally, in an implementation of the first aspect, the first resource is a control resource set or a search space for transmitting a physical downlink control channel.

[0023] In a second aspect, an embodiment of the present application provides a method for wireless communication, including:

[0024] Receiving downlink control information DCI from a network device;

[0025] Determining a downlink control information format DCI Format of the DCI, where

[0026] the DCI Format of the DCI is a first type of DCI Format or 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;

[0027] Determining a resource scheduling mode of a data channel corresponding to the DCI according to the DCI Format of the DCI.

[0028] Therefore, in the wireless communication method according to the embodiments 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 caused by indicating through control signaling, and reducing the operation complexity and power consumption of the terminal device.

[0029] Optionally, in an implementation manner of the second aspect, the method further includes:

[0030] Determine the reference signal pattern of the data channel according to the DCI Format of the DCI, where

[0031] The first type of DCI Format corresponds to a first reference signal pattern, the second type of DCI Format corresponds to a second reference signal pattern. In the first reference signal pattern, at least one reference signal is located in a specific symbol of a time slot. In the second reference signal pattern, at least one reference signal is located in a specific symbol of a group of symbols, and the group of symbols is the symbols used to transmit the data channel and its reference signals;

[0032] Determine the reference signal position of the data channel according to the reference signal pattern of the data channel.

[0033] Therefore, in the wireless communication method according to the embodiments of the present application, the network device indicates that at least one reference signal is located in a specific symbol of a time slot through the first type of DCI Format, and indicates that at least one reference signal is 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 caused by indicating through control signaling, and reducing the operation complexity and power consumption of the terminal device.

[0034] 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.

[0035] Optionally, in an implementation manner of the second aspect, a specific symbol of the group of symbols is the first symbol of the group of symbols.

[0036] Optionally, in an implementation manner of the second aspect, the reference signal is a demodulation reference signal DMRS.

[0037] Optionally, in an implementation manner of the second aspect, the receiving the DCI from the network device includes:

[0038] Receive the DCI from the network device on the first resource, where 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.

[0039] Determining the DCI Format of the DCI includes:

[0040] Determine the DCI Format of the DCI according to the first resource.

[0041] Therefore, in the wireless communication method of the embodiments 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 can determine the resource scheduling mode and / or the reference signal transmission mode according to the type of the DCI Format, thereby reducing the operation complexity and power consumption of the terminal device.

[0042] 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.

[0043] In a third aspect, an embodiment of the present application provides a network device, which may execute the method module or unit in the first aspect or any optional implementation manner of the first aspect.

[0044] In a fourth aspect, an embodiment of the present application provides a terminal device, which may execute the method module or unit in the second aspect or any optional implementation manner of the second aspect.

[0045] In a fifth aspect, a network device is provided. The network device includes 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 manner of the first aspect.

[0046] In a sixth aspect, a terminal device is provided. The terminal device includes 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 manner of the second aspect.

[0047] In a seventh aspect, there is provided a computer storage medium storing program code for instructing a computer to execute the method in the first aspect or any possible implementation manner of the first aspect.

[0048] In an eighth aspect, there is provided a computer storage medium storing program code for instructing a computer to execute the method in the second aspect or any possible implementation manner of the second aspect.

[0049] In a ninth aspect, there is provided a computer program product including instructions, which when running on a computer, cause the computer to execute the methods described in the above aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 FIG. shows a wireless communication system to which embodiments of the present application are applied.

[0051] Figure 2 FIG. is a schematic flowchart of a method for wireless communication according to an embodiment of the present application.

[0052] Figure 3 FIG. is a schematic flowchart of another method for wireless communication according to an embodiment of the present application.

[0053] Figure 4 FIG. is a schematic diagram of a transmission data channel according to an embodiment of the present application.

[0054] Figure 5 FIG. is a schematic diagram of another transmission data channel according to an embodiment of the present application.

[0055] Figure 6 FIG. is a schematic block diagram of a network device according to an embodiment of the present application.

[0056] Figure 7 FIG. is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0057] Figure 8 FIG. shows a schematic block diagram of a wireless communication device provided by an embodiment of the present application.

[0058] Figure 9 FIG. is a schematic structural diagram of a system chip according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0059] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.

[0060] The technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (abbreviated as "GSM") system, Code Division Multiple Access (abbreviated as "CDMA") system, Wideband Code Division Multiple Access (abbreviated as "WCDMA") system, General Packet Radio Service (abbreviated as "GPRS"), Long Term Evolution (abbreviated as "LTE") system, LTE Frequency Division Duplex (abbreviated as "FDD") system, LTE Time Division Duplex (abbreviated as "TDD"), Universal Mobile Telecommunication System (abbreviated as "UMTS"), Worldwide Interoperability for Microwave Access (abbreviated as "WiMAX") communication system or future 5G system, etc.

[0061] Figure 1 FIG. 1 shows a wireless communication system 100 to which the embodiment of the present application is applied. 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 terminal devices (such as UEs) located within the coverage area. Optionally, the network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, may also be a NodeB (NB) in a WCDMA system, may also be an Evolutional Node B (eNB or eNodeB) in an LTE system, or a radio controller in a 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 (PLMN), etc.

[0062] The wireless communication system 100 further includes at least one terminal device 120 within the coverage area of the network device 110. The terminal device 120 can 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 device, 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 can 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 capabilities, a computing device, or other processing devices 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.

[0063] Optionally, direct device-to-device (D2D) communication can be performed between the terminal devices 120.

[0064] Optionally, the 5G system or network can also be referred to as a New Radio (NR) system or network.

[0065] Figure 1 Exemplarily, one network device and two terminal devices are shown. Optionally, the wireless communication system 100 may include multiple network devices, and the coverage area of each network device may include other numbers of terminal devices. The embodiments of the present application do not limit this.

[0066] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity. The embodiments of the present application do not limit this.

[0067] In the 5G NR standard, two scheduling modes can be supported: slot-based scheduling and non-slot-based scheduling. The so-called non-slot-based scheduling is that the time-domain granularity of scheduling is reduced to Orthogonal Frequency Division Multiplexing (OFDM) symbols, and this mode can achieve more flexible time-domain resource allocation. There are different ways to determine the time-domain position of the Demodulation Reference Signal (DMRS) for slot-based scheduling and non-slot-based scheduling: the first column of DMRS in the slot-based scheduling mode is located in the 3rd or 4th symbol of the slot; the first column of DMRS in the non-slot-based scheduling mode is located in the first symbol of the data channel.

[0068] In addition, the base station will indicate which of the above two scheduling modes is used to schedule the terminal.

[0069] Optionally, in the embodiments of the present application, the network device can implicitly indicate the resource scheduling mode and / or the reference signal transmission mode through the Downlink Control Information Format (DCI Format).

[0070] For example, all DCI Formats are divided into the first type of DCI Format and the second type of DCI Format. The first type of DCI Format corresponds to the first resource scheduling mode, the second type of DCI Format corresponds to the second resource scheduling mode. The first resource scheduling mode indicates the time-domain resources in units of slots, and the second resource scheduling mode indicates the time-domain resources in units of symbols.

[0071] For example, in the protocol of Release 9, the following several types of DCI are defined in total: 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, and 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, and 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 into 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 into the second type of DCI Format.

[0072] It should be understood that the terms "system" and "network" in this article are often used interchangeably in this article. The term " / or" in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0073] Figure 2 It is a schematic flowchart of a method 200 for wireless communication according to an embodiment of the present application. As Figure 2 shown, the method 200 can be executed by a network device, and the network device can be the network device shown in Figure 1 and the terminal device in the method 200 can be the terminal device shown in Figure 1 and the method 200 includes the following content.

[0074] 210. The network device sends DCI to the terminal device using the first DCI format among multiple downlink control information DCI formats.

[0075] 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, 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.

[0076] Optionally, the first DCI format is the first type of DCI format or the second type of DCI format.

[0077] 220. The network device transmits a data channel using the resource scheduling mode corresponding to the first DCI format.

[0078] Optionally, after receiving the DCI, the terminal device can determine the resource scheduling mode according to the format of the DCI. Furthermore, the terminal device can accurately transmit the data channel using the time-domain resources corresponding to the resource scheduling mode determined according to the format of the DCI.

[0079] Optionally, the method 200 further includes:

[0080] The network device transmits a reference signal of the data channel using the reference signal mode corresponding to the first DCI format, where

[0081] 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; there is at least one reference signal in a specific symbol of a time slot in the first reference signal mode, and there is at least one reference signal in a specific symbol of a group of symbols in the second reference signal mode. The group of symbols is the symbol used to transmit the data channel and its reference signal.

[0082] Optionally, the reference signal is a Demodulation Reference Signal (DMRS).

[0083] Optionally, a specific symbol of the time slot is the third time-domain symbol or the fourth time-domain symbol of the time slot.

[0084] Optionally, a specific symbol of the group of symbols is the first symbol of the group of symbols.

[0085] Optionally, the specific symbol is the symbol position of the first column of DMRS.

[0086] Optionally, for the time-slot-based scheduling method, the first column of DMRS is located at the 3rd or 4th symbol of the slot; for the symbol-based scheduling method, the first column of DMRS is located at the first symbol of the data channel, that is, the first symbol of the group of symbols.

[0087] Optionally, the network device sends DCI to a terminal device by using a first DCI format among multiple DCI formats, including:

[0088] The network device sends the DCI to the terminal device on a first resource by using the first DCI format, where

[0089] if the first DCI format is the first type of DCI format, the first resource is a resource in units of time slots;

[0090] if the first DCI format is the second type of DCI format, the first resource is a resource in units of symbols.

[0091] 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 the first type of DCI format; if the granularity of the first resource is a symbol, the DCI format is the second type of DCI format.

[0092] Optionally, the first resource is a control resource set or a search space for transmitting a physical downlink control channel.

[0093] Therefore, in the wireless communication method according to 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, and indicates time domain resources in units of symbols through the second type of DCI format. Thus, the network device can implicitly indicate a resource scheduling mode through a downlink control information format, avoiding control signaling overhead generated by indicating through control signaling, and reducing the operation complexity and power consumption of the terminal device.

[0094] Further, the network device indicates that there is at least one reference signal located in a specific symbol of a time slot through the first type of DCI Format, and indicates that there is 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 a reference signal transmission mode through a downlink control information format, avoiding control signaling overhead generated by indicating through control signaling, and reducing the operation complexity and power consumption of the terminal device.

[0095] Figure 3 is a schematic flowchart of a wireless communication method 300 according to an embodiment of the present application. As Figure 3 shown, the method 300 may be executed by a terminal device, and the terminal device may be the terminal device as shown in Figure 1 , and the network device in the method 300 may be the network device as shown in Figure 1 . The method 300 includes the following.

[0096] 310, the terminal device receives downlink control information DCI from the network device.

[0097] 320, the terminal device determines the DCI format of the DCI.

[0098] Optionally, the DCI format of the DCI is a first type of DCI format or a second type of DCI format.

[0099] Optionally, 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.

[0100] 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.

[0101] Optionally, the method 300 further includes:

[0102] The terminal device determines the reference signal pattern of the data channel according to the DCI format of the DCI, where

[0103] the first type of DCI format corresponds to a first reference signal pattern, the second type of DCI format corresponds to a second reference signal pattern, there is at least one reference signal in the first reference signal pattern located in a specific symbol of a time slot, and there is at least one reference signal in the second reference signal pattern located in a specific symbol of a group of symbols, and the group of symbols is the symbol used to transmit the data channel and its reference signal;

[0104] The terminal device determines the reference signal position of the data channel according to the reference signal pattern of the data channel.

[0105] Optionally, a specific symbol of the time slot is the third time domain symbol or the fourth time domain symbol of the time slot.

[0106] Optionally, a specific symbol of the group of symbols is the first symbol of the group of symbols.

[0107] Optionally, the reference signal is a demodulation reference signal DMRS.

[0108] Optionally, receiving the DCI from the network device includes:

[0109] Receiving the DCI from the network device on a first resource, where 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;

[0110] The determining the DCI format of the DCI includes:

[0111] The terminal device determines the DCI format of the DCI according to the first resource.

[0112] Optionally, the first resource is a control resource set (CORESET) or a search space for transmitting a physical downlink control channel.

[0113] Optionally, as Figure 4 shown, as an example, the terminal device can determine the DCI Format to be searched according to the period of the first resource (control resource set or search space), and then determine the data channel scheduling mode and the DMRS symbol position according to the DCI Format.

[0114] Specifically, as Figure 4 shown:

[0115] In 410, the terminal device receives the control resource set / search space configuration sent by the network device.

[0116] Optionally, the control resource set / search space configuration can be configured in time slot granularity or in symbol granularity.

[0117] In 421, if the control resource set / search space is configured in time slot granularity, the terminal device searches for a DCI with a first type of DCI format in the control resource set / search space.

[0118] In 431, the terminal device receives a DCI with a first type of DCI format.

[0119] In 441, the terminal device determines that the data channel adopts a first resource scheduling mode and a first reference signal mode.

[0120] In 451, the terminal device determines the data channel resources and the reference signal position based on the first resource scheduling mode and the first reference signal mode.

[0121] In 461, the terminal device receives or transmits a data channel.

[0122] In 422, if the control resource set / search space is configured in symbol granularity, the terminal device searches for a DCI with a second type of DCI format in the control resource set / search space.

[0123] In 432, the terminal device receives a DCI with a second type of DCI format.

[0124] In 442, the terminal device determines that the data channel adopts a second resource scheduling mode and a second reference signal mode.

[0125] 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.

[0126] In 462, the terminal device receives or transmits a data channel.

[0127] Optionally, as Figure 5 shown, as an example, the terminal device may determine the data channel scheduling mode and DMRS symbol positions according to the DCI Format.

[0128] Specifically, as Figure 5 shown:

[0129] In 510, the terminal device receives the control resource set / search space configuration sent by the network device.

[0130] In 520, the terminal device searches for DCI in the control resource set / search space.

[0131] In 531, if the format of the searched DCI is the first type of DCI format, the terminal device receives the DCI with the first type of DCI format.

[0132] In 541, the terminal device determines that the data channel adopts the first resource scheduling mode and the first reference signal mode.

[0133] 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.

[0134] In 561, the terminal device receives or transmits a data channel.

[0135] In 532, if the format of the searched DCI is the second type of DCI format, the terminal device receives the DCI with the second type of DCI format.

[0136] In 542, the terminal device determines that the data channel adopts the second resource scheduling mode and the second reference signal mode.

[0137] 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.

[0138] In 562, the terminal device receives or transmits a data channel.

[0139] It should be understood that the steps in the method 300 for wireless communication may refer to the descriptions of the corresponding steps in the method 200 for wireless communication. For the sake of brevity, they are not elaborated here.

[0140] Therefore, in the wireless communication method according to the embodiments of the present application, the network device indicates time domain resources in units of time slots through the first type of DCI format, and indicates 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 indicating through control signaling, and reducing the operation complexity and energy consumption of the terminal device.

[0141] Furthermore, the network device indicates that there is at least one reference signal located at a specific symbol in a time slot through the first type of DCI format, and indicates that there is at least one reference signal located at a specific symbol in 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 indicating through control signaling, and reducing the operation complexity and energy consumption of the terminal device.

[0142] Furthermore, the terminal device can determine the DCI Format corresponding to the DCI according to the granularity of the first resource in the time domain, and then can determine the resource scheduling mode and / or the reference signal transmission mode according to the type of the DCI Format.

[0143] Figure 6 It is a schematic block diagram of a network device 600 according to an embodiment of the present application. As Figure 6 shown, the network device 600 includes:

[0144] A transceiver unit 610, configured to send DCI to a terminal device by using a first DCI format among a plurality of downlink control information DCI formats, where

[0145] the plurality of 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;

[0146] The transceiver unit 610 is further configured to transmit a data channel by using the resource scheduling mode corresponding to the first DCI format.

[0147] Optionally, the transceiver unit 610 is further configured to transmit a reference signal of the data channel by using the reference signal mode corresponding to the first DCI format, where

[0148] The first type of DCI format corresponds to a first reference signal pattern, and the second type of DCI format corresponds to a second reference signal pattern; in the first reference signal pattern, at least one reference signal is located in a specific symbol of a time slot, and in the second reference signal pattern, at least one reference signal is located in a specific symbol of a group of symbols, where the group of symbols is the symbol for transmitting the data channel and its reference signal.

[0149] Optionally, a specific symbol of the time slot is the third time domain symbol or the fourth time domain symbol of the time slot.

[0150] Optionally, a specific symbol of the group of symbols is the first symbol of the group of symbols.

[0151] Optionally, the reference signal is a demodulation reference signal DMRS.

[0152] Optionally, the transceiver unit 610 is specifically configured to:

[0153] Send the DCI to the terminal device on a first resource using the first DCI format, where

[0154] If the first DCI format is the first type of DCI format, the first resource is a resource in units of time slots;

[0155] If the first DCI format is the second type of DCI format, the first resource is a resource in units of symbols.

[0156] Optionally, the first resource is a control resource set or a search space for transmitting a physical downlink control channel.

[0157] It should be understood that the network device 600 according to the embodiments of the present application may correspond to the network device in the method embodiments of the present application, and the above and other operations and / or functions of each unit in the network device 600 are respectively for implementing Figure 2 The corresponding processes of the network device in the method 200 shown, for the sake of brevity, will not be repeated here.

[0158] Figure 7 It is a schematic block diagram of a terminal device 700 according to an embodiment of the present application. As Figure 7 shown, the terminal device 700 includes:

[0159] A receiving unit 710, configured to receive downlink control information DCI from a network device;

[0160] A processing unit 720, configured to determine the DCI format of the DCI, where

[0161] The DCI format of the DCI is a first type of DCI format or a second type of DCI format. 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;

[0162] The processing unit 720 is further configured to determine the resource scheduling mode of the data channel corresponding to the DCI according to the DCI format of the DCI.

[0163] Optionally, the processing unit 720 is further configured to determine the reference signal pattern of the data channel according to the DCI format of the DCI, where

[0164] The first type of DCI format corresponds to a first reference signal pattern, and the second type of DCI format corresponds to a second reference signal pattern. In the first reference signal pattern, at least one reference signal is located in a specific symbol of a time slot, and in the second reference signal pattern, at least one reference signal is located in a specific symbol of a group of symbols. The group of symbols is the symbol used to transmit the data channel and its reference signal;

[0165] The processing unit 720 is further configured to determine the reference signal position of the data channel according to the reference signal pattern of the data channel.

[0166] Optionally, a specific symbol of the time slot is the third time domain symbol or the fourth time domain symbol of the time slot.

[0167] Optionally, a specific symbol of the group of symbols is the first symbol of the group of symbols.

[0168] Optionally, the reference signal is a demodulation reference signal DMRS.

[0169] Optionally, the receiving unit 710 is further configured to receive the DCI from the network device on a first resource. 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;

[0170] The processing unit 720 is further configured to determine the DCI format of the DCI according to the first resource.

[0171] Optionally, the first resource is a control resource set or a search space for transmitting a physical downlink control channel.

[0172] 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 for realizingFigure 3 The corresponding process of the terminal device in the method 300 shown is not described herein again for the sake of brevity.

[0173] Figure 8 FIG. shows a schematic block diagram of a wireless communication device 800 provided by an embodiment of the present application. The device 800 includes:

[0174] A memory 810 for storing a program, the program including code;

[0175] A transceiver 820 for communicating with other devices;

[0176] A processor 830 for executing the program code in the memory 810.

[0177] Optionally, when the code is executed, the processor 830 may implement Figure 2 each operation performed by the network device in the method 200. For the sake of brevity, it is not described herein again. At this time, the device 800 may 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.

[0178] Optionally, when the code is executed, the processor 830 may also implement Figure 3 each operation performed by the terminal device in the method 300. For the sake of brevity, it is not described herein again. At this time, the device 800 may be a terminal device, for example, a mobile phone.

[0179] 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 (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0180] The memory 810 may include a read-only memory and a random access memory, and provide instructions and data to the processor 830. A part of the memory 810 may also include a non-volatile random access memory. For example, the memory 810 may also store information about the device type.

[0181] 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.

[0182] 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 drive of instructions in software form. Therefore, the wireless communication device 800 can be a chip or a chipset. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed and completed by the hardware processor, or can be executed and completed by the combination of the hardware and software modules in the processor. The software module can be located in a mature storage medium in the art 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. This storage medium is located in the memory, and the processor 830 reads the information in the memory and combines its hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.

[0183] Figure 9 FIG. 4 is a schematic structural diagram of a system-on-chip 900 according to an embodiment of the present application. Figure 9 In the system-on-chip 900, an input interface 901, an output interface 902, a processor 903, and a memory 904 can be connected through an internal communication connection line. The processor 903 is used to execute the code in the memory 904.

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

[0185] Optionally, when the code is executed, the processor 903 implements the method executed by the terminal device in the method embodiments. For the sake of brevity, it will not be elaborated here.

[0186] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by the combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0187] 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 foregoing method embodiments, and will not be elaborated here.

[0188] In 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 merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be other division methods. For example, 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 displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical, or other forms.

[0189] The unit described as a separate component may or may not be physically separated. The component displayed as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0190] In addition, in each embodiment of the present application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0191] 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, in essence, or the part that contributes to the prior art or a part of this technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0192] As described above, the above are only the specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for wireless communication, characterized in that, comprising: sending DCI to a terminal device by using a first DCI format among multiple downlink control information DCI formats, where 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; transmitting a data channel by using the resource scheduling mode corresponding to the first DCI format.

2. The method according to claim 1, characterized in that, the method further comprises: transmitting a reference signal of the data channel by using a reference signal mode corresponding to the first DCI format, where 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; there is at least one reference signal in a specific symbol of a time slot in the first reference signal mode, and there is at least one reference signal in a specific symbol of a group of symbols in the second reference signal mode, and the group of symbols is the symbols for transmitting the data channel and its reference signal.

3. The method according to claim 2, 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.

4. The method according to claim 2 or 3, characterized in that, a specific symbol of the group of symbols is the first symbol of the group of symbols.

5. The method according to any one of claims 1 to 4, characterized in that, the step of sending DCI to a terminal device by using a first DCI format among multiple DCI formats includes: sending the DCI to the terminal device on a first resource by using the first DCI format, where if the first DCI format is the first type of DCI format, the first resource is a resource in units of time slots; if the first DCI format is the second type of DCI format, the first resource is a resource in units of symbols.

6. A method for wireless communication, characterized in that, comprising: receiving downlink control information DCI from a network device; determining the DCI format of the DCI, where the DCI format of the DCI is the first type of DCI format or the 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; determining the resource scheduling mode of the data channel corresponding to the DCI according to the DCI format of the DCI.

7. The method according to claim 6, characterized in that, the method further comprises: determining the reference signal mode of the data channel according to the DCI format of the DCI, where The first type of DCI format corresponds to a first reference signal pattern, and the second type of DCI format corresponds to a second reference signal pattern. In the first reference signal pattern, at least one reference signal is located in a specific symbol of a time slot. In the second reference signal pattern, at least one reference signal is located in a specific symbol of a group of symbols, and the group of symbols is the symbol used to transmit the data channel and its reference signal. Determine the reference signal position of the data channel according to the reference signal pattern of the data channel.

8. The method according to claim 7, wherein, the reference signal is a demodulation reference signal DMRS.

9. The method according to any one of claims 6 to 8, wherein, 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: determining the DCI format of the DCI according to the first resource.

10. The method according to claim 9, wherein, the first resource is a control resource set or a search space for transmitting a physical downlink control channel.

11. A network device, wherein, including: a transceiver unit, configured to send DCI to a terminal device by using a first DCI format among a plurality of downlink control information DCI formats, wherein, the plurality of 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, 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. 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 by using the resource scheduling mode corresponding to the first DCI format.

12. The network device according to claim 11, wherein, the transceiver unit is further configured to transmit a reference signal of the data channel by using the reference signal pattern corresponding to the first DCI format, wherein, the first type of DCI format corresponds to a first reference signal pattern, and the second type of DCI format corresponds to a second reference signal pattern; in the first reference signal pattern, at least one reference signal is located in a specific symbol of a time slot. In the second reference signal pattern, at least one reference signal is located in a specific symbol of a group of symbols, and the group of symbols is the symbol used to transmit the data channel and its reference signal.

13. The network device according to claim 11 or 12, wherein, the transceiver unit is specifically configured to: send the DCI to the terminal device on a first resource by 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 units of time slots; If the first DCI format is the second type of DCI format, the first resource is a resource in units of symbols.

14. A terminal device, characterized in that, comprising: a receiving unit, configured to receive downlink control information DCI from a network device; a processing unit, configured to determine the DCI format of the DCI, wherein, the DCI format of the DCI is the first type of DCI format or the 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; the processing unit is further configured to determine the resource scheduling mode of the data channel corresponding to the DCI according to the DCI format of the DCI.

15. The terminal device according to claim 14, characterized in that, the processing unit is further configured to determine the reference signal mode of the data channel according to the 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, at least one reference signal exists in a specific symbol of a time slot in the first reference signal mode, and at least one reference signal exists in a specific symbol of a group of symbols in the second reference signal mode, and the group of symbols is the symbol for transmitting the data channel and its reference signal; the processing unit is further configured to determine the reference signal position of the data channel according to the reference signal mode of the data channel.

16. The terminal device according to claim 14 or 15, 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 configured to determine the DCI format of the DCI according to the first resource.

17. A network device, characterized in that, comprising 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 according to any one of claims 1-5.

18. A terminal device, characterized in that, comprising 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 according to any one of claims 6-10.

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