Method and apparatus for receiving DCI, method and apparatus for sending DCI, and terminal and network-side device

Abstract

The present application belongs to the technical field of wireless communications. Disclosed are a method and apparatus for receiving DCI, a method and apparatus for sending DCI, and a terminal and a network-side device. The method for receiving DCI in the embodiments of the present application comprises: a terminal detecting DCI, the DCI comprising at least one of the following: first-level DCI and second-level DCI, wherein the first-level DCI comprises assistance information, the assistance information being used for assisting in detecting the second-level DCI, and the second-level DCI comprises scheduling information for terminal data. (FIG. 2)

Description

DCI receiving method, sending method, device, terminal and network side equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 2024100415802 filed on January 10, 2024, and the contents of the above-mentioned Chinese patent application disclosure are hereby incorporated by reference in their entirety as a part of this application. Technical Field

[0003] The present application belongs to the field of wireless communication technology, and specifically relates to a DCI receiving method, sending method, device, terminal and network-side equipment. Background Art

[0004] When a user equipment (UE) demodulates the Physical Downlink Control Channel (PDCCH), it must perform PDCCH blind detection within the search space (SS) configured by the network. The UE's power consumption during PDCCH blind detection is proportional to the number of blind detections of PDCCH candidates. Reducing the number of PDCCH blind detections helps save power for the UE. Therefore, reducing the number of PDCCH blind detections to reduce the UE's blind detection complexity and power consumption is an urgent issue. Summary of the Invention

[0005] The embodiments of the present application provide a DCI receiving method, sending method, apparatus, terminal and network-side equipment, which can solve the problem of how to reduce the number of blind detections of PDCCH to reduce the blind detection complexity and blind detection power consumption of UE.

[0006] In a first aspect, a method for receiving DCI is provided, including:

[0007] The terminal detects DCI, where the DCI includes at least one of the following: a first-level DCI and a second-level DCI, wherein the first-level DCI includes auxiliary information, the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0008] In a second aspect, a method for transmitting DCI is provided, including:

[0009] The network side device sends DCI, which includes: first-level DCI and second-level DCI, wherein the first-level DCI includes auxiliary information, the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0010] In a third aspect, a DCI receiving device is provided, including:

[0011] A receiving module is used to detect DCI, where the DCI includes at least one of the following: a first-level DCI and a second-level DCI, wherein the first-level DCI includes auxiliary information, the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0012] In a fourth aspect, a DCI sending device is provided, including:

[0013] The sending module is used to send DCI, where the DCI includes: first-level DCI and second-level DCI, wherein the first-level DCI includes auxiliary information, the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0014] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0015] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is used to detect DCI, and the DCI includes at least one of the following: a first-level DCI and a second-level DCI, wherein the first-level DCI includes auxiliary information, and the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0016] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0017] In the eighth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to send DCI, and the DCI includes: first-level DCI and second-level DCI, wherein the first-level DCI includes auxiliary information, and the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0018] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the DCI receiving method as described in the first aspect are implemented, or the steps of the DCI sending method as described in the second aspect are implemented.

[0019] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the DCI receiving method as described in the first aspect, and the network side device can be used to execute the steps of the DCI sending method as described in the second aspect.

[0020] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run a program or instruction to implement the DCI receiving method as described in the first aspect, or to implement the DCI sending method as described in the second aspect.

[0021] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the DCI receiving method as described in the first aspect, or the program / program product is executed by at least one processor to implement the steps of the DCI sending method as described in the second aspect.

[0022] In an embodiment of the present application, since the first-level DCI contains auxiliary information for assisting in detecting the second-level DCI, after successfully detecting the first-level DCI, the terminal can assist in detecting the second-level DCI based on the auxiliary information in the first-level DCI, thereby reducing the number of blind detections of the PDCCH, thereby reducing the terminal's blind detection complexity and blind detection power consumption, and achieving the purpose of saving power for the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a block diagram of a wireless communication system applicable to embodiments of the present application;

[0024] FIG2 is a schematic diagram of a flow chart of a method for receiving DCI according to an embodiment of the present application;

[0025] FIG3 is a schematic diagram showing the mapping of the first-level DCI and the second-level DCI to the same monitoring opportunity according to an embodiment of the present application;

[0026] FIG4 is a schematic diagram showing that auxiliary information of the first-level DCI is effective in a time period according to an embodiment of the present application;

[0027] FIG5 is a schematic diagram of a flow chart of a method for transmitting DCI according to an embodiment of the present application;

[0028] FIG6 is a schematic structural diagram of a DCI receiving device according to an embodiment of the present application;

[0029] FIG7 is a schematic structural diagram of a DCI transmitting apparatus according to an embodiment of the present application;

[0030] FIG8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0031] FIG9 is a schematic diagram of the hardware structure of a terminal according to an embodiment of the present application;

[0032] FIG10 is a schematic diagram of the hardware structure of the network side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0034] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0035] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0036] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems.

[0037] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the relevant field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0038] The following is a brief description of the relevant technical contents involved in this application.

[0039] 1. New Radio (NR) PDCCH structure

[0040] A control channel element (CCE) is the most basic structural unit of a PDCCH. One CCE consists of six resource element groups (REGs), and each REG consists of 12 resource elements (REs).

[0041] To adapt to the channel environment and the size of downlink control information (DCI), a PDCCH candidate may be mapped to N CCEs, where N is the aggregation level (AL) of the PDCCH and the value of N may be 1 / 2 / 4 / 8 / 16.

[0042] 2. Blind detection of NR PDCCH

[0043] When a UE demodulates a PDCCH, it must perform blind PDCCH detection within the search space (SS) configured by the network. This search space configuration includes the search space type (i.e., common search space (CSS) and UE-specific search space (USS)), the DCI format to be detected, the PDCCH AL (or ALs) corresponding to each DCI format, and the number of PDCCH candidates to be detected for each PDCCH AL.

[0044] When a UE detects PDCCHs, the maximum number of PDCCH candidates it can blindly detect in each slot is limited by the blind detection (BD) budget. If a UE is configured with multiple search spaces in a slot, and the total number of PDCCH candidates to be detected in these search spaces exceeds the BD budget, the UE will abandon monitoring PDCCH candidates in certain lower-priority search spaces. The priority of the CSS is higher than that of the USS, and the priority of a USS with a smaller sequence number is higher than that of a USS with a larger sequence number.

[0045] 2.NR PDCCH demodulation power consumption

[0046] There is a correlation between the demodulation power consumption of PDCCH and the number of blind detections of PDCCH candidates. 3GPP TR38.840 gives the trend of the change of PDCCH blind detection power consumption with the number of blind detections, namely: P(α)=α·Pt+(1–α)·0.7Pt

[0047] Where α is the ratio of the PDCCH candidates detected by the UE in the search space to the maximum number of PDCCH candidates in the search space. Pt is the power consumption of all PDCCH candidates in the blind search space, and P(α) is the power consumption of the subset of PDCCH candidates in the blind search space.

[0048] Below, in combination with the accompanying drawings, the DCI receiving method, sending method, apparatus, terminal and network-side equipment provided in the embodiments of the present application are described in detail through some embodiments and their application scenarios.

[0049] Referring to FIG. 2 , an embodiment of the present application provides a method for receiving DCI, including:

[0050] Step 21: The terminal detects DCI, where the DCI includes at least one of the following: a first-level DCI and a second-level DCI, wherein the first-level DCI includes auxiliary information, the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0051] In an embodiment of the present application, optionally, the second-level DCI may carry all the scheduling information for the terminal data, or the first-level DCI carries part of the scheduling information for the terminal data, and the second-level DCI carries part of the scheduling information for the terminal data.

[0052] Optionally, the scheduling information for terminal data may include at least one of the following: information for demodulating a physical downlink shared channel (PDSCH), and information for sending a physical uplink shared channel (PUSCH).

[0053] In an embodiment of the present application, since the first-level DCI contains auxiliary information for assisting in detecting the second-level DCI, after successfully detecting the first-level DCI, the terminal can assist in detecting the second-level DCI based on the auxiliary information in the first-level DCI, thereby reducing the number of blind detections of the PDCCH, thereby reducing the terminal's blind detection complexity and blind detection power consumption, and achieving the purpose of saving power for the terminal.

[0054] In the embodiment of the present application, optionally, the terminal detecting the DCI includes: the terminal detecting the first-level DCI according to a PDCCH mapping rule of the first-level DCI.

[0055] In an embodiment of the present application, optionally, the PDCCH mapping rule of the first-level DCI is agreed upon by a protocol or configured by a network-side device.

[0056] In an embodiment of the present application, optionally, the PDCCH mapping rule of the first-level DCI includes at least one of the following: relevant information of the aggregation level of the first-level DCI, relevant information of the PDCCH candidate to be detected corresponding to the first-level DCI, relevant information of the time-frequency resource position of the first-level DCI, and relevant information of the DCI format corresponding to the first-level DCI.

[0057] In some embodiments of the present application, for example, it is agreed or configured that the first-level DCI adopts only one aggregation level, thereby reducing the number of PUCCH blind detections of the terminal.

[0058] In some embodiments of the present application, for example, multiple aggregation levels of the first-level DCI are agreed or configured. In this case, the terminal needs to blindly detect the first-level DCI corresponding to multiple aggregation levels.

[0059] In an embodiment of the present application, optionally, the relevant information of the PDCCH candidates to be detected corresponding to the first-level DCI includes at least one of the following: the number information of the PDCCH candidates to be detected corresponding to the first-level DCI, the time-frequency position information of the PDCCH candidates to be detected corresponding to the first-level DCI, the numbering information of the PDCCH candidates to be detected corresponding to the first-level DCI, etc.

[0060] For example, the number of PDCCH candidates to be detected corresponding to the first-level DCI is agreed or configured to be M, and M can take a smaller value such as 1, 2, etc., thereby reducing the number of PUCCH blind detections of the terminal.

[0061] The time-frequency position of the PDCCH candidate to be detected corresponding to the agreed or configured first-level DCI may be the PDCCH candidate corresponding to the frequency domain element (CCE) with the lowest sequence number in the search space.

[0062] The number of the PDCCH candidate to be detected corresponding to the agreed or configured first-level DCI may be determined based on information such as the terminal ID (UE ID) / cell ID (Cell ID) / configured ID (Configured ID) / Radio Network Temporary Identity (RNTI) / slot index. For example, all PDCCH candidates in the search space are numbered 1 to N according to a preset rule, and the number i of the PDCCH candidate to be detected corresponding to the first-level DCI is determined by the above ID information, that is, i = ID mod N.

[0063] In an embodiment of the present application, optionally, the auxiliary information includes a PDCCH mapping rule of the second-level DCI.

[0064] In an embodiment of the present application, optionally, the PDCCH mapping rule of the second-level DCI includes at least one of the following: relevant information about the aggregation level of the second-level DCI, relevant information about the PDCCH candidate to be detected corresponding to the second-level DCI, relevant information about the time-frequency resource position of the second-level DCI, and relevant information about the DCI format corresponding to the second-level DCI.

[0065] In some embodiments, for example, the first-level DCI carries an aggregation level indication field, which explicitly indicates the aggregation level of the second-level DCI. Specifically, it may indicate one or a group of aggregation levels.

[0066] In some embodiments, for example, the first-level DCI implicitly indicates the aggregation level of the second-level DCI, for example, the aggregation levels of the first-level DCI and the second-level DCI are the same.

[0067] In some embodiments, for example, the first-level DCI carries a PDCCH candidate indication field, which explicitly indicates relevant information of the PDCCH candidate corresponding to the second-level DCI. Specifically, it may indicate relevant information of one or a group of PDCCH candidates.

[0068] In an embodiment of the present application, optionally, the relevant information of the PDCCH candidate to be detected corresponding to the second-level DCI may be relevant information of one or a group of PDCCH candidates.

[0069] In an embodiment of the present application, optionally, the relevant information of the PDCCH candidates to be detected corresponding to the second-level DCI includes at least one of the following: the number information of the PDCCH candidates to be detected corresponding to the second-level DCI, the time-frequency position information of the PDCCH candidates to be detected corresponding to the second-level DCI, the numbering information of the PDCCH candidates to be detected corresponding to the second-level DCI, etc.

[0070] In an embodiment of the present application, optionally, the number of the PDCCH candidate to be detected corresponding to the second-level DCI may be determined based on information such as the number indicated by the first-level DCI. For example, all PDCCH candidates in the search space or the PDCCH candidates corresponding to the aggregation level of the second-level DCI are numbered 1 to N according to a preset rule, and the number i of the PDCCH candidate to be detected corresponding to the second-level DCI is determined by the ID information indicated by the first-level DCI, that is, i=ID mod N.

[0071] In an embodiment of the present application, optionally, the structure of the second-level DCI may be the same as the structure of a single-level DCI (a first-level DCI (also referred to as a first-level DCI or legacy DCI)) in the related art.

[0072] The first-level DCI mentioned above may be different types of DCI, which will be described below with examples.

[0073] (1) In some embodiments, optionally, the first-level DCI is a UE group common DCI, so that multiple terminals can simultaneously detect the first-level DCI to obtain auxiliary information of the second-level DCI, which is conducive to terminal resource sharing and improving resource utilization efficiency.

[0074] Optionally, the first-level DCI includes multiple indication fields, each of which is used to indicate the auxiliary information of one or a group of terminals.

[0075] Optionally, the correspondence between the indication field and the terminal or terminal group is configured by a network-side device, so that different information can be indicated to different terminals or terminal groups, thereby improving the flexibility of indication.

[0076] (2) In some embodiments, optionally, the first-level DCI is a sequence-based DCI.

[0077] Optionally, the terminal detecting DCI includes: the terminal detecting sequence-based DCI on a first resource, where information of at least one of a time domain basic unit and a frequency domain basic unit included in the first resource is agreed upon by a protocol or configured by a network-side device. For example, the frequency domain basic unit is agreed upon or configured to occupy a length of one CCE.

[0078] Optionally, the first resource includes a first frequency domain resource, and the frequency domain basic units contained in the first frequency domain resource satisfy at least one of the following: the frequency domain basic units contained in the first frequency domain resource do not overlap with each other in the frequency domain, the frequency domain basic units contained in the first frequency domain resource are continuous in the frequency domain, and the frequency domain basic units contained in the first frequency domain resource are spaced apart in the frequency domain at an integer multiple of the length of the frequency domain basic units.

[0079] Optionally, the first resource includes a first time domain resource, the first time domain resource includes at least one monitoring occasion, and the number of time domain basic units in each monitoring occasion is agreed upon by a protocol or configured by a network-side device. Optionally, the number of sequences that can be mapped to each monitoring occasion of the first time domain resource is equal to the number of time domain basic units in the first time domain resource.

[0080] Optionally, at least one of the time domain basic unit and the frequency domain basic unit is agreed upon by a protocol or configured by a network side device.

[0081] Optionally, the sequence-based DCI indicates the auxiliary information based on a sequence status.

[0082] Optionally, indicating the auxiliary information based on the sequence status includes: jointly indicating the auxiliary information based on sequence statuses of multiple sequences.

[0083] For example, the sequence can be grouped, and each sequence group has M state information (carrying N bits of information, N = log2(M)). In some embodiments, the network side device can configure a sequence group for the terminal, and the sequence state of the sequence group can jointly indicate the auxiliary information. The terminal blindly detects the corresponding sequence group to obtain the auxiliary information.

[0084] Optionally, the sequence-based DCI (first-level DCI) and the corresponding second-level DCI have at least one of the following association relationships:

[0085] The frequency domain basic unit of the sequence-based DCI is related to the frequency domain basic unit of the corresponding second-level DCI; for example, the frequency domain basic unit of the sequence-based DCI and the corresponding second-level DCI are the same size or are integer multiples of each other.

[0086] There is a mapping relationship between the frequency domain position of the sequence-based DCI and the corresponding frequency domain position of the second-level DCI; for example, the frequency domain resources occupied by the second-level DCI are the same as those of the sequence-based DCI.

[0087] The frequency domain range of the sequence-based DCI is the same as that of the corresponding second-level DCI; for example, the sequence-based DCI corresponds to one frequency basic unit, and the second-level DCI corresponds to four frequency basic units. In this case, when sending the first-level DCI, it can be repeatedly sent on four frequency basic units, so that the frequency domain range of the sequence-based DCI is the same as that of the corresponding second-level DCI;

[0088] The sequence-based DCI is located before the corresponding second-level DCI;

[0089] The sequence-based DCI is temporally continuous with the corresponding second-level DCI;

[0090] The transmit power of the sequence-based DCI is the same as the transmit power of the corresponding second-level DCI, and the terminal may perform an automatic gain control (AGC) operation through sequence detection;

[0091] The power spectral density (PSD) of the sequence-based DCI is the same as the power spectral density of the corresponding second-level DCI, and the terminal can perform an automatic gain control operation through sequence detection.

[0092] Optionally, the sequence-based DCI and the synchronization signal use the same type of sequence, or the sequence-based DCI and the synchronization signal sequence are transmitted together.

[0093] Further optionally, the sequence-based DCI may adopt a synchronization signal sequence such as a ZC sequence, a gold sequence or an m sequence.

[0094] Further optionally, the sequence-based DCI may be sent as a cell-specific (cell specific) or terminal group common sequence (UE group common sequence).

[0095] Further optionally, the mapping position of the sequence-based DCI may appear at a preset position so that the terminal can perform synchronization signal detection.

[0096] (3) In some embodiments, optionally, the first-level DCI includes a wake-up signal (WUS), that is, the first-level DCI and the wake-up signal are integrated into one DCI format, thereby reducing the complexity of demodulating the DCI by the terminal.

[0097] (IV) In some embodiments, optionally, the first-level DCI corresponding to the second-level DCI is a historical DCI before the second-level DCI. For example, the first-level DCI corresponding to the second-level DCI is the previous DCI of the second-level DCI received by the terminal.

[0098] Optionally, the first-level DCI corresponding to the second-level DCI is a historical DCI within a first preset time range before the second-level DCI.

[0099] In the embodiment of the present application, optionally, the first-level DCI corresponds to the second-level DCI one-to-one, that is, one first-level DCI corresponds to one second-level DCI.

[0100] In the embodiment of the present application, optionally, the first-level DCI and the second-level DCI are mapped to the same search space or monitoring occasion. As shown in FIG3 , the first-level DCI and the second-level DCI are mapped to the same monitoring occasion.

[0101] In the embodiment of the present application, optionally, the terminal detecting the DCI includes:

[0102] Step 211: The terminal detects the first-level DCI;

[0103] Step 212: When the terminal demodulates the first-level DCI, detect the second-level DCI according to the auxiliary information in the first-level DCI.

[0104] In the embodiment of the present application, optionally, after the terminal detects the first-level DCI, the method further includes:

[0105] Step 213: If the terminal fails to demodulate the first-level DCI, the second-level DCI is not detected.

[0106] In an embodiment of the present application, the above-mentioned terminal detection DCI (i.e., two-level DCI) behavior can be configured by the network side. If the network side is not configured with the above-mentioned DCI detection behavior, the terminal assumes that the network side only schedules a single-level DCI (also called a first-level DCI or legacy DCI) for the terminal.

[0107] In an embodiment of the present application, optionally, the second-level DCI can carry all the scheduling information for the terminal data, that is, the second-level DCI is equivalent to a single-level DCI. At this time, the terminal may also only blindly detect the second-level DCI and not blindly detect the first-level DCI. At this time, the two-level DCI edge degenerates to a single-level DCI.

[0108] Optionally, the scheduling information for terminal data may include at least one of the following: information for demodulating a physical downlink shared channel (PDSCH), and information for sending a physical uplink shared channel (PUSCH).

[0109] In the embodiment of the present application, optionally, when the terminal demodulates the first-level DCI, detecting the second-level DCI based on the auxiliary information in the first-level DCI includes: detecting the second-level DCI based on the auxiliary information within a second preset time after the terminal demodulates the first-level DCI. That is, the first-level DCI appears before the corresponding second-level DCI, the auxiliary information of the first-level DCI is effective for a time period (the second preset time), and within the time period, the terminal blindly detects the second-level DCI based on the auxiliary information in the first-level DCI. Please refer to Figure 4.

[0110] In the embodiment of the present application, optionally, the terminal detecting the DCI includes:

[0111] The terminal detects the first level DCI at a monitoring opportunity corresponding to the first level DCI;

[0112] The terminal detects the second-level DCI at a monitoring opportunity corresponding to the second-level DCI.

[0113] Optionally, the terminal detecting the second-level DCI at a monitoring opportunity corresponding to the second-level DCI includes:

[0114] When the terminal demodulates the first level DCI, detecting the second level DCI according to the auxiliary information at a monitoring opportunity corresponding to the second level DCI;

[0115] When the terminal fails to demodulate the first-level DCI, the second-level DCI is detected at the monitoring opportunity corresponding to the second-level DCI. At this time, the terminal performs blind detection on the second-level DCI, and the blind detection behavior can be the same as the blind detection behavior of the single-level DCI.

[0116] In an embodiment of the present application, optionally, the terminal detecting DCI includes: when the number of blind detections of the PDCCH candidate corresponding to the DCI by the terminal within a second preset time is higher than a blind detection budget (BD budget), the terminal abandons the detection of the PDCCH candidate corresponding to the DCI in the first search space (certain search spaces).

[0117] In the embodiment of the present application, optionally, the number of blind detections of the PDCCH candidate corresponding to the DCI is determined in one of the following ways:

[0118] The number of blind detections of the PDCCH candidate corresponding to the DCI in the same search space is determined according to the number of blind detections of the PDCCH candidate corresponding to the first-level DCI; for example, the number of blind detections of the PDCCH candidate corresponding to the DCI in the same search space is equal to the number of blind detections of the PDCCH candidate corresponding to the first-level DCI, or is equal to the number of blind detections of the PDCCH candidate corresponding to the first-level DCI plus 1.

[0119] The number of blind detections of the PDCCH candidates corresponding to the DCI in the same search space is determined according to the number of blind detections of the PDCCH candidates corresponding to the first-level DCI and the second-level DCI, for example, equal to the sum of the number of blind detections of the PDCCH candidates corresponding to the first-level DCI and the second-level DCI.

[0120] In an embodiment of the present application, optionally, the second-level DCI is located in the search space following the first-level DCI, and the number of blind detections of the PDCCH candidate corresponding to the second-level DCI is determined by at least one of the following methods:

[0121] Determine the number of blind detections of the PDCCH candidate corresponding to the second-level DCI according to the relevant information of the aggregation level of the second-level DCI indicated in the auxiliary information of the first-level DCI and at least one of the PDCCH candidates;

[0122] In a case where the terminal fails to demodulate the first level DCI, the number of blind detections of the PDCCH candidate corresponding to the second level DCI is determined according to the relevant information of the aggregation level of the second level DCI configured in the search space and at least one of the PDCCH candidates.

[0123] In the above embodiment, the blind detection budget of the terminal is jointly defined for the first-level DCI and the second-level DCI.

[0124] In some other embodiments of the present application, optionally, the blind detection budget of the terminal may also be independently defined for the first-level DCI and the second-level DCI, that is, the blind detection budget of the first-level DCI and the blind detection budget of the second-level DCI are defined separately. For example, the first-level DCI is sequence-based DCI and the second-level DCI is payload-based DCI. The demodulation capability requirements of the two DCIs are different, and the blind detection budgets of the first-level DCI and the second-level DCI can be defined independently.

[0125] Referring to FIG. 5 , an embodiment of the present application provides a method for transmitting DCI, including:

[0126] Step 51: The network side device sends DCI, which includes: first-level DCI and second-level DCI, wherein the first-level DCI includes auxiliary information, and the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0127] In an embodiment of the present application, optionally, the second-level DCI may carry all the scheduling information for the terminal data, or the first-level DCI carries part of the scheduling information for the terminal data, and the second-level DCI carries part of the scheduling information for the terminal data.

[0128] Optionally, the scheduling information for terminal data may include at least one of the following: information for demodulating a physical downlink shared channel (PDSCH), and information for sending a physical uplink shared channel (PUSCH).

[0129] In an embodiment of the present application, the network side device sends two levels of DCI. Since the first level DCI contains auxiliary information for assisting in detecting the second level DCI, after successfully detecting the first level DCI, the terminal can assist in detecting the second level DCI based on the auxiliary information in the first level DCI, thereby reducing the number of blind detections of the PDCCH, thereby reducing the blind detection complexity and blind detection power consumption of the terminal, and achieving the purpose of saving power for the terminal.

[0130] In some embodiments, optionally, the DCI sending method further includes: the network side device sending the PDCCH mapping rule of the first-level DCI, that is, the PDCCH mapping rule of the first-level DCI is configured by the network side.

[0131] In some embodiments, optionally, the PDCCH mapping rule of the first-level DCI may also be agreed upon by a protocol.

[0132] In an embodiment of the present application, optionally, the PDCCH mapping rule of the first-level DCI includes at least one of the following: relevant information of the aggregation level of the first-level DCI, relevant information of the PDCCH candidate to be detected corresponding to the first-level DCI, relevant information of the time-frequency resource position of the first-level DCI, and relevant information of the DCI format corresponding to the first-level DCI.

[0133] For example, the number of PDCCH candidates to be detected corresponding to the first-level DCI is agreed or configured to be M, and M can take a smaller value such as 1, 2, etc., thereby reducing the number of PUCCH blind detections of the terminal.

[0134] The time-frequency position of the PDCCH candidate to be detected corresponding to the agreed or configured first-level DCI may be the PDCCH candidate corresponding to the frequency domain element (CCE) with the lowest sequence number in the search space.

[0135] The number of the PDCCH candidate to be detected corresponding to the agreed or configured first-level DCI may be determined based on information such as the terminal ID (UE ID) / cell ID (Cell ID) / configured ID (Configured ID) / Radio Network Temporary Identity (RNTI) / slot index. For example, all PDCCH candidates in the search space are numbered 1 to N according to a preset rule, and the number i of the PDCCH candidate to be detected corresponding to the first-level DCI is determined by the above ID information, that is, i = ID mod N.

[0136] In an embodiment of the present application, optionally, the auxiliary information includes a PDCCH mapping rule of the second-level DCI.

[0137] In an embodiment of the present application, optionally, the PDCCH mapping rule of the second-level DCI includes at least one of the following: relevant information about the aggregation level of the second-level DCI, relevant information about the PDCCH candidate to be detected corresponding to the second-level DCI, relevant information about the time-frequency resource position of the second-level DCI, and relevant information about the DCI format corresponding to the second-level DCI.

[0138] In some embodiments, for example, the first-level DCI carries an aggregation level indication field, which explicitly indicates the aggregation level of the second-level DCI. Specifically, it may indicate one or a group of aggregation levels.

[0139] In some embodiments, for example, the first-level DCI implicitly indicates the aggregation level of the second-level DCI, for example, the aggregation levels of the first-level DCI and the second-level DCI are the same.

[0140] In some embodiments, for example, the first-level DCI carries a PDCCH candidate indication field, which explicitly indicates relevant information of the PDCCH candidate corresponding to the second-level DCI. Specifically, it may indicate relevant information of one or a group of PDCCH candidates.

[0141] In an embodiment of the present application, optionally, the relevant information of the PDCCH candidate to be detected corresponding to the second-level DCI may be relevant information of one or a group of PDCCH candidates.

[0142] In an embodiment of the present application, optionally, the relevant information of the PDCCH candidates to be detected corresponding to the second-level DCI includes at least one of the following: the number information of the PDCCH candidates to be detected corresponding to the second-level DCI, the time-frequency position information of the PDCCH candidates to be detected corresponding to the second-level DCI, the numbering information of the PDCCH candidates to be detected corresponding to the second-level DCI, etc.

[0143] In an embodiment of the present application, optionally, the number of the PDCCH candidate to be detected corresponding to the second-level DCI may be determined based on information such as the number indicated by the first-level DCI. For example, all PDCCH candidates in the search space or the PDCCH candidates corresponding to the aggregation level of the second-level DCI are numbered 1 to N according to a preset rule, and the number i of the PDCCH candidate to be detected corresponding to the second-level DCI is determined by the ID information indicated by the first-level DCI, that is, i=ID mod N.

[0144] In an embodiment of the present application, optionally, the structure of the second-level DCI may be the same as the structure of a single-level DCI (a first-level DCI (also referred to as a first-level DCI or legacy DCI)) in the related art.

[0145] The first-level DCI mentioned above may be different types of DCI, which will be described below with examples.

[0146] (1) In some embodiments, optionally, the first-level DCI is a terminal group common DCI.

[0147] Optionally, the first-level DCI includes multiple indication fields, each of which is used to indicate the auxiliary information of one or a group of terminals.

[0148] Optionally, the correspondence between the indication field and the terminal or terminal group is configured by a network-side device.

[0149] (2) In some embodiments, optionally, the first-level DCI is a sequence-based DCI.

[0150] Optionally, the network side device sending DCI includes: the network side device sending sequence-based DCI on a first resource, and information of at least one of the time domain basic units and frequency domain basic units contained in the first resource is agreed upon by a protocol or configured by the network side device.

[0151] Optionally, the first resource includes a first frequency domain resource, and the frequency domain basic units contained in the first frequency domain resource satisfy at least one of the following: the frequency domain basic units contained in the first frequency domain resource do not overlap with each other in the frequency domain, the frequency domain basic units contained in the first frequency domain resource are continuous in the frequency domain, and the frequency domain basic units contained in the first frequency domain resource are spaced apart in the frequency domain at an integer multiple of the length of the frequency domain basic units.

[0152] Optionally, the first resource includes a first time domain resource, the first time domain resource includes at least one monitoring opportunity, and the number of time domain basic units on each monitoring opportunity is agreed upon by a protocol or configured by a network side device.

[0153] Optionally, at least one of the time domain basic unit and the frequency domain basic unit is agreed upon by a protocol or configured by the network side device.

[0154] Optionally, the sequence-based DCI indicates the auxiliary information based on a sequence status.

[0155] Optionally, indicating the auxiliary information based on the sequence status includes: jointly indicating the auxiliary information based on sequence statuses of multiple sequences.

[0156] Optionally, the sequence-based DCI (first-level DCI) and the corresponding second-level DCI have at least one of the following association relationships:

[0157] The frequency domain basic unit of the sequence-based DCI is related to the frequency domain basic unit of the corresponding second-level DCI; for example, the frequency domain basic unit of the sequence-based DCI and the corresponding second-level DCI are the same size or are integer multiples of each other.

[0158] There is a mapping relationship between the frequency domain position of the sequence-based DCI and the corresponding frequency domain position of the second-level DCI; for example, the frequency domain resources occupied by the second-level DCI are the same as those of the sequence-based DCI.

[0159] The frequency domain range of the sequence-based DCI is the same as that of the corresponding second-level DCI; for example, the sequence-based DCI corresponds to one frequency basic unit, and the second-level DCI corresponds to four frequency basic units. In this case, when sending the first-level DCI, it can be repeatedly sent on four frequency basic units, so that the frequency domain range of the sequence-based DCI is the same as that of the corresponding second-level DCI;

[0160] The sequence-based DCI is located before the corresponding second-level DCI;

[0161] The sequence-based DCI is temporally continuous with the corresponding second-level DCI;

[0162] The transmit power of the sequence-based DCI is the same as the transmit power of the corresponding second-level DCI, and the terminal may perform an automatic gain control (AGC) operation through sequence detection;

[0163] The power spectral density (PSD) of the sequence-based DCI is the same as the power spectral density of the corresponding second-level DCI, and the terminal can perform an automatic gain control operation through sequence detection.

[0164] Optionally, the sequence-based DCI and the synchronization signal use the same type of sequence, or the sequence-based DCI and the synchronization signal sequence are transmitted together.

[0165] Further optionally, the sequence-based DCI may adopt a synchronization signal sequence such as a ZC sequence, a gold sequence or an m sequence.

[0166] Further optionally, the sequence-based DCI may be sent as a cell-specific (cell specific) or terminal group common sequence (UE group common sequence).

[0167] Further optionally, the mapping position of the sequence-based DCI may appear at a preset position so that the terminal can perform synchronization signal detection.

[0168] (3) In some embodiments, optionally, the first-level DCI includes a wake-up signal (WUS), that is, the first-level DCI and the wake-up signal are integrated into one DCI format, thereby reducing the complexity of demodulating the DCI by the terminal.

[0169] (IV) In some embodiments, optionally, the first-level DCI corresponding to the second-level DCI is a historical DCI before the second-level DCI. For example, the first-level DCI corresponding to the second-level DCI is the previous DCI of the second-level DCI received by the terminal.

[0170] Optionally, the first-level DCI corresponding to the second-level DCI is a historical DCI within a first preset time range before the second-level DCI.

[0171] In the embodiment of the present application, optionally, the first-level DCI corresponds to the second-level DCI one-to-one, that is, one first-level DCI corresponds to one second-level DCI.

[0172] In an embodiment of the present application, optionally, the first-level DCI and the second-level DCI are mapped to the same search space or monitoring opportunity.

[0173] The DCI receiving method provided in the embodiment of the present application may be performed by a DCI receiving device. In the embodiment of the present application, the DCI receiving device performing the DCI receiving method is taken as an example to illustrate the DCI receiving device provided in the embodiment of the present application.

[0174] Referring to FIG6 , an embodiment of the present application further provides a DCI receiving device 60, including:

[0175] The receiving module 61 is used to detect DCI, where the DCI includes at least one of the following: first-level DCI and second-level DCI, wherein the first-level DCI includes auxiliary information, and the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0176] In an embodiment of the present application, since the first-level DCI contains auxiliary information for assisting in detecting the second-level DCI, after successfully detecting the first-level DCI, the second-level DCI can be assisted in detecting based on the auxiliary information in the first-level DCI, thereby reducing the number of blind detections of the PDCCH, thereby reducing the blind detection complexity and blind detection power consumption of the DCI receiving device, and achieving the purpose of saving power.

[0177] Optionally, the first-level DCI is a terminal group common DCI.

[0178] Optionally, the first-level DCI includes multiple indication fields, each of which is used to indicate the auxiliary information of one or a group of terminals.

[0179] Optionally, the correspondence between the indication field and the terminal or terminal group is configured by a network-side device.

[0180] Optionally, the first-level DCI is a sequence-based DCI.

[0181] Optionally, the receiving module 61 is configured to detect sequence-based DCI on a first resource, where information of at least one of a time domain basic unit and a frequency domain basic unit included in the first resource is agreed upon by a protocol or configured by a network-side device.

[0182] Optionally, the first resource includes a first frequency domain resource, and the frequency domain basic units contained in the first frequency domain resource satisfy at least one of the following: the frequency domain basic units contained in the first frequency domain resource do not overlap with each other in the frequency domain, the frequency domain basic units contained in the first frequency domain resource are continuous in the frequency domain, and the frequency domain basic units contained in the first frequency domain resource are spaced apart in the frequency domain at an integer multiple of the length of the frequency domain basic units.

[0183] Optionally, the first resource includes a first time domain resource, the first time domain resource includes at least one monitoring opportunity, and the number of time domain basic units on each monitoring opportunity is agreed upon by a protocol or configured by a network side device.

[0184] Optionally, the sequence-based DCI indicates the auxiliary information based on a sequence status.

[0185] Optionally, indicating the auxiliary information based on the sequence status includes: jointly indicating the auxiliary information based on sequence statuses of multiple sequences.

[0186] Optionally, the sequence-based DCI has at least one of the following association relationships with the corresponding second-level DCI:

[0187] The frequency domain basic unit of the sequence-based DCI is related to the frequency domain basic unit of the corresponding second-level DCI;

[0188] There is a mapping relationship between the frequency domain position of the sequence-based DCI and the frequency domain position of the corresponding second-level DCI;

[0189] The frequency domain range of the sequence-based DCI is the same as the corresponding second-level DCI;

[0190] The sequence-based DCI is located before the corresponding second-level DCI;

[0191] The sequence-based DCI is temporally continuous with the corresponding second-level DCI;

[0192] The transmit power of the sequence-based DCI is the same as the transmit power of the corresponding second-level DCI;

[0193] The power spectral density of the sequence-based DCI is the same as the power spectral density of the corresponding second-level DCI.

[0194] Optionally, the sequence-based DCI and the synchronization signal use the same type of sequence, or the sequence-based DCI and the synchronization signal sequence are transmitted together.

[0195] Optionally, the first-level DCI includes a wake-up signal.

[0196] Optionally, the first-level DCI corresponding to the second-level DCI is a historical DCI before the second-level DCI.

[0197] Optionally, the first-level DCI corresponding to the second-level DCI is a historical DCI within a first preset time range before the second-level DCI.

[0198] Optionally, the first-level DCI corresponds one-to-one to the second-level DCI.

[0199] Optionally, the first-level DCI and the second-level DCI are mapped to the same search space or monitoring opportunity.

[0200] Optionally, the receiving module 61 is configured to detect the first-level DCI; and when the first-level DCI is demodulated, detect the second-level DCI according to the auxiliary information in the first-level DCI.

[0201] Optionally, the receiving module 61 is configured to not detect the second-level DCI if the first-level DCI is not demodulated.

[0202] Optionally, the receiving module 61 is configured to detect the second-level DCI according to the auxiliary information within a second preset time after the first-level DCI is demodulated.

[0203] Optionally, the receiving module 61 is used to detect the first-level DCI at the monitoring opportunity corresponding to the first-level DCI; when the first-level DCI is demodulated, the second-level DCI is detected according to the auxiliary information at the monitoring opportunity corresponding to the second-level DCI; when the first-level DCI is not demodulated, the second-level DCI is detected at the monitoring opportunity corresponding to the second-level DCI.

[0204] Optionally, the number of blind detections of the PDCCH candidate corresponding to the DCI is determined in one of the following ways:

[0205] The number of blind detections of the PDCCH candidates corresponding to the DCI in the same search space is determined according to the number of blind detections of the PDCCH candidates corresponding to the first-level DCI;

[0206] The number of blind detections of the PDCCH candidates corresponding to the DCI in the same search space is determined according to the number of blind detections of the PDCCH candidates corresponding to the first-level DCI and the second-level DCI.

[0207] Optionally, the second-level DCI is located in a search space following the first-level DCI, and the number of blind detections of the PDCCH candidate corresponding to the second-level DCI is determined by at least one of the following methods:

[0208] Determine the number of blind detections of the PDCCH candidate corresponding to the second-level DCI according to the relevant information of the aggregation level of the second-level DCI indicated in the auxiliary information of the first-level DCI and at least one of the PDCCH candidates;

[0209] In a case where the terminal fails to demodulate the first level DCI, the number of blind detections of the PDCCH candidate corresponding to the second level DCI is determined according to the relevant information of the aggregation level of the second level DCI configured in the search space and at least one of the PDCCH candidates.

[0210] Optionally, the blind detection budget of the first-level DCI and the blind detection budget of the second-level DCI are defined separately.

[0211] The DCI receiving device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0212] The DCI receiving device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment of Figure 2 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0213] The DCI sending method provided in the embodiment of the present application can be executed by a DCI sending device. In the embodiment of the present application, the DCI sending method performed by the DCI sending device is taken as an example to illustrate the DCI sending device provided in the embodiment of the present application.

[0214] Referring to FIG. 7 , an embodiment of the present application further provides a DCI transmitting apparatus 70, including:

[0215] The sending module 71 is used to send DCI, where the DCI includes: first-level DCI and second-level DCI, wherein the first-level DCI includes auxiliary information, the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0216] Optionally, the first-level DCI is a terminal group common DCI.

[0217] Optionally, the first-level DCI includes multiple indication fields, each of which is used to indicate the auxiliary information of one or a group of terminals.

[0218] Optionally, the correspondence between the indication field and the terminal or terminal group is configured by the network side device.

[0219] Optionally, the first-level DCI is a sequence-based DCI.

[0220] Optionally, the sending module 71 is configured to send a sequence-based DCI on a first resource, and information of at least one item of a time domain basic unit and a frequency domain basic unit included in the first resource is agreed upon by a protocol or configured by the network side device.

[0221] Optionally, the first resource includes a first frequency domain resource, and the frequency domain basic units contained in the first frequency domain resource satisfy at least one of the following: the frequency domain basic units contained in the first frequency domain resource do not overlap with each other in the frequency domain, the frequency domain basic units contained in the first frequency domain resource are continuous in the frequency domain, and the frequency domain basic units contained in the first frequency domain resource are spaced apart in the frequency domain at an integer multiple of the length of the frequency domain basic units.

[0222] Optionally, the first resource includes a first time domain resource, the first time domain resource includes at least one monitoring opportunity, and the number of time domain basic units on each monitoring opportunity is agreed upon by a protocol or configured by a network side device.

[0223] Optionally, the sequence-based DCI indicates the auxiliary information based on a sequence status.

[0224] Optionally, indicating the auxiliary information based on the sequence status includes: jointly indicating the auxiliary information based on sequence statuses of multiple sequences.

[0225] Optionally, the sequence-based DCI has at least one of the following association relationships with the corresponding second-level DCI:

[0226] The frequency domain basic unit of the sequence-based DCI is related to the frequency domain basic unit of the corresponding second-level DCI;

[0227] There is a mapping relationship between the frequency domain position of the sequence-based DCI and the frequency domain position of the corresponding second-level DCI;

[0228] The frequency domain range of the sequence-based DCI is the same as the corresponding second-level DCI;

[0229] The sequence-based DCI is located before the corresponding second-level DCI;

[0230] The sequence-based DCI is temporally continuous with the corresponding second-level DCI;

[0231] The transmit power of the sequence-based DCI is the same as the transmit power of the corresponding second-level DCI;

[0232] The power spectral density of the sequence-based DCI is the same as the power spectral density of the corresponding second-level DCI.

[0233] Optionally, the sequence-based DCI and the synchronization signal use the same type of sequence, or the sequence-based DCI and the synchronization signal sequence are transmitted together.

[0234] Optionally, the first-level DCI includes a wake-up signal.

[0235] Optionally, the first-level DCI corresponding to the second-level DCI is a historical DCI before the second-level DCI.

[0236] Optionally, the first-level DCI corresponding to the second-level DCI is a historical DCI within a first preset time range before the second-level DCI.

[0237] Optionally, the first-level DCI corresponds one-to-one to the second-level DCI.

[0238] Optionally, the first-level DCI and the second-level DCI are mapped to the same search space or monitoring opportunity.

[0239] The DCI sending device in the embodiment of the present application can be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or a chip.

[0240] The DCI sending device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment of Figure 5 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0241] As shown in Figure 8, an embodiment of the present application further provides a communication device 80, including a processor 81 and a memory 82. The memory 82 stores a program or instruction that can be executed on the processor 81. For example, when the communication device 80 is a terminal, the program or instruction, when executed by the processor 81, implements the various steps of the above-mentioned DCI receiving method embodiment and can achieve the same technical effect. When the communication device 80 is a network-side device, the program or instruction, when executed by the processor 81, implements the various steps of the above-mentioned DCI sending method embodiment and can achieve the same technical effect. To avoid repetition, they are not repeated here.

[0242] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG2 . This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this terminal embodiment and can achieve the same technical effects. Specifically, FIG9 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0243] The terminal 90 includes but is not limited to: a radio frequency unit 91, a network module 92, an audio output unit 93, an input unit 94, a sensor 95, a display unit 96, a user input unit 97, an interface unit 98, a memory 99 and at least some of the components of the processor 910.

[0244] Those skilled in the art will appreciate that the terminal 90 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 910 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG9 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0245] It should be understood that in an embodiment of the present application, the input unit 94 may include a graphics processing unit (GPU) 941 and a microphone 942, and the graphics processor 941 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 96 may include a display panel 961, and the display panel 961 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 97 includes a touch panel 971 and at least one of other input devices 972. The touch panel 971 is also called a touch screen. The touch panel 971 may include two parts: a touch detection device and a touch controller. Other input devices 972 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0246] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 91 may transmit the data to the processor 910 for processing. Furthermore, the RF unit 91 may send uplink data to the network-side device. Typically, the RF unit 91 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0247] The memory 99 can be used to store software programs or instructions and various data. The memory 99 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 99 may include a volatile memory or a non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 99 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0248] Processor 910 may include one or more processing units. Optionally, processor 910 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 910.

[0249] The processor 910 is used to detect DCI, and the DCI includes at least one of the following: first-level DCI and second-level DCI, wherein the first-level DCI includes auxiliary information, and the auxiliary information is used to assist in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

[0250] In an embodiment of the present application, since the first-level DCI contains auxiliary information for assisting in detecting the second-level DCI, after successfully detecting the first-level DCI, the terminal can assist in detecting the second-level DCI based on the auxiliary information in the first-level DCI, thereby reducing the number of blind detections of the PDCCH, thereby reducing the terminal's blind detection complexity and blind detection power consumption, and achieving the purpose of saving power for the terminal.

[0251] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment shown in Figure 2, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0252] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG5 . This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0253] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 10, the network-side device 100 includes an antenna 101, a radio frequency device 102, a baseband device 103, a processor 104, and a memory 105. Antenna 101 is connected to radio frequency device 102. In the uplink direction, radio frequency device 102 receives information via antenna 101 and sends the received information to baseband device 103 for processing. In the downlink direction, baseband device 103 processes the information to be transmitted and sends it to radio frequency device 102. Radio frequency device 102 processes the received information and then sends it through antenna 101.

[0254] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 103 , which includes a baseband processor.

[0255] The baseband device 103 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 10, one of which is, for example, a baseband processor, which is connected to the memory 105 through a bus interface to call the program in the memory 105 and execute the network device operations shown in the above method embodiment.

[0256] The network side device may further include a network interface 106, which is, for example, a Common Public Radio Interface (CPRI).

[0257] Specifically, the network side device 100 of the embodiment of the present application also includes: instructions or programs stored in the memory 105 and can be run on the processor 104. The processor 104 calls the instructions or programs in the memory 105 to execute the method of execution of each module shown in Figure 7 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0258] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by the processor, the various processes of the above-mentioned DCI receiving method embodiment are implemented, or when the program or instruction is executed by the processor, the various processes of the above-mentioned DCI sending method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0259] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0260] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned DCI receiving method embodiment, or to implement the various processes of the above-mentioned DCI sending method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0261] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0262] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned DCI receiving method embodiment, or the computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned DCI sending method embodiment, and can achieve the same technical effects. To avoid repetition, they are not repeated here.

[0263] An embodiment of the present application also provides a wireless communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the DCI receiving method described above, and the network side device can be used to execute the steps of the DCI sending method described above.

[0264] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0265] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0266] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for receiving downlink control information (DCI), comprising: A terminal detects DCI, where the DCI includes at least one of the following: first-level DCI and second-level DCI. Among them, the first-level DCI includes auxiliary information, and the auxiliary information is used to assist in detecting the second-level DCI. The second-level DCI includes scheduling information for terminal data.

2. The method according to claim 1, wherein, The first-level DCI is a terminal group common DCI.

3. The method according to claim 2, wherein, The first-level DCI includes a plurality of indication fields, and each indication field is used to indicate the auxiliary information of one or a group of terminals.

4. The method according to claim 3, wherein, The correspondence between the indication field and the terminal or terminal group is configured by a network-side device.

5. The method according to claim 1, wherein, The first-level DCI is a sequence-based DCI.

6. The method according to claim 5, wherein, The terminal detecting DCI includes: The terminal detects sequence-based DCI on a first resource, and information of at least one of the time-domain basic unit and the frequency-domain basic unit included in the first resource is specified by a protocol or configured by a network-side device.

7. The method according to claim 6, wherein, The first resource includes a first frequency-domain resource, and the frequency-domain basic units included in the first frequency-domain resource satisfy at least one of the following: the frequency-domain basic units included in the first frequency-domain resource do not overlap with each other in the frequency domain, the frequency-domain basic units included in the first frequency-domain resource are continuous in the frequency domain, and the interval between the frequency-domain basic units included in the first frequency-domain resource is an integer multiple of the length of the frequency-domain basic unit.

8. The method according to claim 6, wherein, The first resource includes a first time-domain resource, and the first time-domain resource includes at least one monitoring occasion, and the number of time-domain basic units on each monitoring occasion is specified by a protocol or configured by a network-side device.

9. The method according to claim 5, wherein The sequence-based DCI indicates the auxiliary information based on a sequence state.

10. The method according to claim 9, wherein, The indicating the auxiliary information based on the sequence state includes: jointly indicating the auxiliary information based on the sequence states of multiple sequences.

11. The method according to claim 5, wherein, The sequence-based DCI and the corresponding second-level DCI have at least one of the following association relationships: The frequency-domain basic unit of the sequence-based DCI is related to the frequency-domain basic unit of the corresponding second-level DCI; There is a mapping relationship between the frequency-domain position of the sequence-based DCI and the frequency-domain position of the corresponding second-level DCI; The frequency-domain range of the sequence-based DCI is the same as that of the corresponding second-level DCI; The sequence-based DCI is located before the corresponding second-level DCI; The sequence-based DCI and the corresponding second-level DCI are continuous in time; The transmission power of the sequence-based DCI is the same as that of the corresponding second-level DCI; The power spectral density of the sequence-based DCI is the same as that of the corresponding second-level DCI.

12. The method according to claim 5, wherein, The sequence-based DCI uses the same type of sequence as the synchronization signal, or the sequence-based DCI is transmitted together with the synchronization signal sequence.

13. The method according to claim 1, wherein, The first-level DCI includes a wake-up signal.

14. The method according to claim 1, wherein The first-level DCI corresponding to the second-level DCI is the historical DCI before the second-level DCI.

15. The method according to claim 14, wherein, The first-level DCI corresponding to the second-level DCI is the historical DCI within a first preset time range before the second-level DCI.

16. The method according to claim 1, wherein, The first-level DCI corresponds one-to-one with the second-level DCI.

17. The method according to claim 16, wherein The first-level DCI and the second-level DCI are mapped to the same search space or monitoring occasion.

18. The method according to claim 1 or 16, wherein The terminal detection DCI includes: The terminal detects the first-level DCI; When the terminal demodulates the first-level DCI, the second-level DCI is detected according to the auxiliary information in the first-level DCI.

19. The method according to claim 18, wherein After the terminal detects the first-level DCI, it further includes: When the terminal fails to demodulate the first-level DCI, the second-level DCI is not detected.

20. The method according to claim 18, wherein When the terminal demodulates the first-level DCI, detecting the second-level DCI according to the auxiliary information in the first-level DCI includes: Within a second preset time after the terminal demodulates the first-level DCI, the second-level DCI is detected according to the auxiliary information.

21. The method according to claim 1 or 16, wherein, The terminal detection DCI includes: The terminal detects the first-level DCI at the monitoring occasion corresponding to the first-level DCI; When the terminal demodulates the first-level DCI, the second-level DCI is detected according to the auxiliary information at the monitoring occasion corresponding to the second-level DCI; When the terminal fails to demodulate the first-level DCI, the second-level DCI is detected at the monitoring occasion corresponding to the second-level DCI.

22. The method according to claim 1, wherein, The blind detection times of the PDCCH candidates corresponding to the DCI are determined by one of the following methods: The blind detection times of the PDCCH candidates corresponding to the DCI within the same search space are determined according to the blind detection times of the PDCCH candidates corresponding to the first-level DCI; The blind detection times of the PDCCH candidates corresponding to the DCI within the same search space are determined according to the blind detection times of the PDCCH candidates corresponding to the first-level DCI and the second-level DCI.

23. The method according to claim 22, wherein The second-level DCI is located in the search space after the first-level DCI. The blind detection times of the PDCCH candidates corresponding to the second-level DCI are determined by at least one of the following methods: The blind detection times of the PDCCH candidates corresponding to the second-level DCI are determined according to at least one of the relevant information of the aggregation level of the second-level DCI indicated in the auxiliary information of the first-level DCI and the PDCCH candidates; When the terminal fails to demodulate the first-level DCI, the blind detection times of the PDCCH candidates corresponding to the second-level DCI are determined according to at least one of the relevant information of the aggregation level of the second-level DCI configured in the search space and the PDCCH candidates.

24. The method according to claim 1, wherein, The blind detection budget of the first-level DCI and the blind detection budget of the second-level DCI are defined separately.

25. A method for transmitting DCI, including: The network-side device transmits DCI, where the DCI includes: a first-level DCI and a second-level DCI. Among them, the first-level DCI includes auxiliary information for assisting in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

26. The method according to claim 25, wherein The first-level DCI is a terminal group common DCI.

27. The method according to claim 26, wherein The first-level DCI includes a plurality of indication fields, and each of the indication fields is used to indicate the auxiliary information of one or a group of terminals.

28. The method according to claim 27, wherein, The correspondence relationship between the indication field and the terminal or the terminal group is configured by the network-side device.

29. The method according to claim 25, wherein The first-level DCI is a sequence-based DCI.

30. The method according to claim 29, wherein The network-side device sending the DCI includes: The network-side device sends a sequence-based DCI on a first resource, and information about at least one of the time-domain basic unit and the frequency-domain basic unit included in the first resource is agreed by the protocol or configured by the network-side device.

31. The method according to claim 30, wherein, The first resource includes a first frequency-domain resource, and the frequency-domain basic units included in the first frequency-domain resource satisfy at least one of the following: the frequency-domain basic units included in the first frequency-domain resource do not overlap with each other in the frequency domain, the frequency-domain basic units included in the first frequency-domain resource are continuous in the frequency domain, and the interval between the frequency-domain basic units included in the first frequency-domain resource is an integer multiple of the length of the frequency-domain basic unit.

32. The method according to claim 30, wherein, The first resource includes a first time-domain resource, the first time-domain resource includes at least one monitoring occasion, and the number of time-domain basic units on each monitoring occasion is agreed by the protocol or configured by the network-side device.

33. The method according to claim 29, wherein The sequence-based DCI indicates the auxiliary information based on the sequence state.

34. The method according to claim 33, wherein, Indicating the auxiliary information based on the sequence state includes: jointly indicating the auxiliary information based on the sequence states of a plurality of sequences.

35. The method according to claim 29, wherein The sequence-based DCI and the corresponding second-level DCI have at least one of the following association relationships: The frequency-domain basic unit of the sequence-based DCI is related to the frequency-domain basic unit of the corresponding second-level DCI; There is a mapping relationship between the frequency-domain position of the sequence-based DCI and the frequency-domain position of the corresponding second-level DCI; The frequency-domain ranges of the sequence-based DCI and the corresponding second-level DCI are the same; The sequence-based DCI is located before the corresponding second-level DCI; The sequence-based DCI and the corresponding second-level DCI are continuous in time; The transmission power of the sequence-based DCI is the same as the transmission power of the corresponding second-level DCI; The power spectral density of the sequence-based DCI is the same as the power spectral density of the corresponding second-level DCI.

36. The method according to claim 29, wherein, The sequence-based DCI uses the same type of sequence as the synchronization signal, or the sequence-based DCI is transmitted together with the synchronization signal sequence.

37. The method according to claim 25, wherein The first-level DCI includes a wake-up signal.

38. The method according to claim 25, wherein, The first-level DCI corresponding to the second-level DCI is the historical DCI before the second-level DCI.

39. The method according to claim 38, wherein, The first-level DCI corresponding to the second-level DCI is the historical DCI within a first preset time range before the second-level DCI.

40. The method according to claim 25, wherein The first-level DCI and the second-level DCI are in one-to-one correspondence.

41. The method according to claim 40, wherein The first-level DCI and the second-level DCI are mapped to the same search space or monitoring occasion.

42. A receiving device for DCI, including: A receiving module for detecting DCI, where the DCI includes at least one of the following: a first-level DCI and a second-level DCI. Among them, the first-level DCI includes auxiliary information for assisting in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

43. The apparatus according to claim 42, wherein the first-level DCI is a terminal group common DCI; or the first-level DCI is a sequence-based DCI; or the first-level DCI includes a wake-up signal; or the first-level DCI corresponding to the second-level DCI is a historical DCI before the second-level DCI.

44. The apparatus according to claim 42, wherein, The first-level DCI and the second-level DCI are in one-to-one correspondence.

45. The apparatus according to claim 42 or 44, wherein The receiving module is configured to detect the first-level DCI; When the first-level DCI is demodulated, the second-level DCI is detected according to the auxiliary information in the first-level DCI.

46. The apparatus according to claim 45, wherein, The receiving module is configured not to detect the second-level DCI when the first-level DCI is not demodulated.

47. The device according to claim 45, wherein The receiving module is configured to detect the second-level DCI according to the auxiliary information within a second preset time after the first-level DCI is demodulated.

48. The device according to claim 42, wherein The blind detection times of the PDCCH candidates corresponding to the DCI are determined by one of the following methods: The blind detection times of the PDCCH candidates corresponding to the DCI in the same search space are determined according to the blind detection times of the PDCCH candidates corresponding to the first-level DCI; The blind detection times of the PDCCH candidates corresponding to the DCI in the same search space are determined according to the blind detection times of the PDCCH candidates corresponding to the first-level DCI and the second-level DCI.

49. A DCI transmitting apparatus, comprising: A transmitting module for transmitting DCI, where the DCI includes: a first-level DCI and a second-level DCI. Among them, the first-level DCI includes auxiliary information for assisting in detecting the second-level DCI, and the second-level DCI includes scheduling information for terminal data.

50. The apparatus according to claim 49, wherein the first-level DCI is a terminal group common DCI; or the first-level DCI is a sequence-based DCI; or the first-level DCI includes a wake-up signal; or the first-level DCI corresponding to the second-level DCI is a historical DCI before the second-level DCI.

51. The apparatus according to claim 50, wherein, The first-level DCI and the second-level DCI are in one-to-one correspondence.

52. A terminal, comprising a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the DCI receiving method according to any one of claims 1 to 24 are implemented.

53. A network-side device, comprising a processor and a memory, where the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, the steps of the DCI transmitting method according to any one of claims 25 to 41 are implemented.

54. A readable storage medium, wherein, The program or instructions are stored on the readable storage medium, and when the program or instructions are executed by the processor, the steps of the method for receiving DCI described in any one of claims 1 to 24 are implemented, or the steps of the method for transmitting DCI described in any one of claims 25 to 41 are implemented.

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