A resource indication method and related devices

Abstract

Embodiments of this application provide a resource indication method and related devices, including: a terminal device receives first indication information and first control information sent by a network device; determines a time domain start position of second control information and a frequency domain start position of the second control information according to the first indication information and the first control information; and receives the second control information sent by the network device according to the time domain start position of the second control information and the frequency domain start position of the second control information. By using the embodiments of this application, the flexibility of control channel indication can be improved, and the performance of signal demodulation can be improved.

Description

Technical Field

[0001] This application relates to the field of wireless network technologies, and in particular, to a resource indication method and related devices. Background Art

[0002] The current standard discussion supports the use of two-level sidelink control information (SCI) for transmitting control channel information, abbreviated as two-level SCI. It is generally considered that the resources of the first-level SCI and the second-level SCI are adjacent or frequency-division multiplexed. In this way, after the first-level SCI is decoded, the physical sidelink control channel (PSCCH) carrying the second-level SCI can be received as soon as possible, and the second-level SCI can be decoded, so as to receive the physical sidelink shared channel (PSSCH) with the minimum delay. However, this method is relatively single and not flexible enough. Summary of the Invention

[0003] This application provides a resource indication method and related devices, which can improve the flexibility of resource indication of the control channel and the performance of signal demodulation.

[0004] In a first aspect, an embodiment of this application provides a resource indication method, including: a terminal device receives first indication information and first control information sent by a network device; determines the time-domain start position and the frequency-domain start position of second control information according to the first indication information and the first control information; and receives second control information sent by the network device according to the time-domain start position and the frequency-domain start position of the second control information. The start symbol position of the second control information is determined through the first indication information and the first control information. This not only improves the flexibility of resource indication of the second control information, but also can correctly receive the second control information, and can effectively be used as the receiving pilot of the data channel, thereby improving the receiving performance of the data channel.

[0005] In an optional manner, the time-domain start position of the second control information is determined according to a reference time-domain position and an offset relative to the reference time-domain position. This can improve the flexibility of resource indication of the second control information.

[0006] In another optional manner, the first indication information includes an offset relative to the reference time-domain position.

[0007] In another optional manner, the first indication information includes time-domain information and frequency-domain information.

[0008] In another alternative manner, the time domain information includes a reference time domain position, and the reference time domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource; the frequency domain information includes a reference frequency domain position, and the reference frequency domain position includes at least one of the frequency domain start position of the first control information, the frequency domain start position of the control channel, and the frequency domain center position of the data channel.

[0009] In another alternative manner, the first indication information further includes a time domain factor for resource configuration, and the time domain factor for resource configuration includes at least one of the size of the subcarrier spacing SCS, the configuration of the additional DMRS in the demodulation reference signal DMRS mode, and the feedback situation of the acknowledgement information of the hybrid automatic repeat request.

[0010] In another alternative manner, the first indication information includes a time domain factor for resource configuration and a reference time domain position. Among them, the time domain factor for resource configuration corresponds to the reference time domain position. The first control information includes an offset relative to the reference time domain position.

[0011] In another implementation manner, the first indication information includes a time domain factor for resource configuration and an offset relative to the reference time domain position, where the time domain factor for resource configuration corresponds to the offset relative to the reference time domain position. The first control information includes the reference time domain position.

[0012] In another alternative manner, the terminal device determines the currently supported time domain factor for resource configuration; searches in the first indication information for the offset relative to the reference time domain position and the reference time domain position corresponding to the time domain factor for resource configuration; and determines the time domain start position of the second control information according to the offset relative to the reference time domain position and the reference time domain position. Determining the time domain start position of the second control information through the currently supported time domain factor for resource configuration not only improves the flexibility of the resource indication of the second control information, but also enables the correct reception of the second control information, and can effectively serve as the reception pilot of the data channel, thereby improving the reception performance of the data channel.

[0013] In another alternative manner, the first control information includes the frequency domain start position of the second control information. By indicating the frequency domain start position of the second control information through the first control information, the transmission of the second control information is effectively guaranteed.

[0014] In another alternative manner, the terminal device obtains the frequency domain start position of the first control information through blind detection; and uses the frequency domain start position of the first control information as the frequency domain start position of the second control information. By determining the frequency domain start position of the second control information through blind detection, the transmission of the second control information is effectively guaranteed.

[0015] In a second aspect, an embodiment of the present application provides a resource indication method, including: a network device sends first indication information and first control information to a terminal device, where the first indication information and the first control information are used for the terminal device to determine the time domain start position and the frequency domain start position of second control information, and the time domain start position and the frequency domain start position of the second control information are used for the terminal device to receive the second control information sent by the network device. By using the first indication information and the first control information, the start symbol position of the second control information is determined. This not only improves the flexibility of resource indication of the second control information, but also enables the correct reception of the second control information, which can effectively serve as the reception pilot of the data channel, thereby improving the reception performance of the data channel.

[0016] In an optional manner, the time domain start position of the second control information is determined according to a reference time domain position and an offset relative to the reference time domain position. This can improve the flexibility of resource indication of the second control information.

[0017] In another optional manner, the first indication information includes an offset relative to the reference time domain position.

[0018] In another optional manner, the first indication information includes time domain information and frequency domain information.

[0019] In another optional manner, the time domain information includes a reference time domain position, and the reference time domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource; the frequency domain information includes a reference frequency domain position, and the reference frequency domain position includes at least one of the frequency domain start position of the first control information, the frequency domain start position of the control channel, and the frequency domain center position of the data channel.

[0020] In another optional manner, the first indication information further includes a resource configuration time domain factor, and the resource configuration time domain factor includes at least one of the size of the subcarrier spacing SCS, the configuration of the additional DMRS in the demodulation reference signal DMRS mode, and the feedback situation of the acknowledgment information of the hybrid automatic repeat request.

[0021] In another optional manner, the first indication information includes a resource configuration time domain factor and a reference time domain position. Among them, the resource configuration time domain factor corresponds to the reference time domain position. The first control information includes an offset relative to the reference time domain position.

[0022] In another implementation, the first indication information includes a time-domain factor of resource configuration and an offset relative to a reference time-domain position, where the time-domain factor of resource configuration corresponds to the offset relative to the reference time-domain position. The first control information includes the reference time-domain position.

[0023] In another possible design, the terminal device maps the second control information to frequency-domain resources according to the start position of the second control information in the frequency domain, the number of frequency-domain resources occupied by the second control information, and the number of copies of the frequency-domain resources.

[0024] In another possible design, the terminal device obtains the position of the frequency-domain resources occupied by the DMRS; and maps the second control information according to the position of the frequency-domain resources occupied by the DMRS.

[0025] In another possible design, the second control information and the scheduled data channel can perform resource mapping in a frequency-division multiplexing manner, so as to not only ensure simple data mapping and demodulation, but also allocate more transmit power on the control channel.

[0026] In another possible design, the second control information can be mapped to the middle position of the frequency domain of the data channel. This can reduce the out-of-band leakage of adjacent frequency bands, thereby improving the decoding performance of the control information.

[0027] In a third aspect, an embodiment of the present application provides a resource indication device, which is configured to implement the methods and functions performed by the terminal device in the first aspect above, and is implemented by hardware / software, and its hardware / software includes modules corresponding to the above functions.

[0028] In a fourth aspect, an embodiment of the present application provides a resource indication device, which is configured to implement the methods and functions performed by the network device in the second aspect above, and is implemented by hardware / software, and its hardware / software includes modules corresponding to the above functions.

[0029] In a fifth aspect, an embodiment of the present application provides a terminal device, including a processor and a memory; the memory is used to store computer execution instructions; the processor is used to execute the computer execution instructions stored in the memory, so that the terminal device executes the methods and functions performed by the terminal device in the first aspect above.

[0030] In a sixth aspect, an embodiment of the present application provides a network device, including a processor and a memory; the memory is used to store computer execution instructions; the processor is used to execute the computer execution instructions stored in the memory, so that the network device executes the methods and functions performed by the network device in the second aspect above.

[0031] In a seventh aspect, the present application provides a computer-readable storage medium storing instructions which, when run on a computer, cause the computer to execute the method according to any of the above aspects.

[0032] In an eighth aspect, the present application provides a computer program product for storing a computer program which, when run on a computer, causes the computer to execute the method according to any of the above aspects.

[0033] In a ninth aspect, an embodiment of the present application provides a communication system including a terminal device according to any of the above aspects and a network device according to any of the above aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the accompanying drawings required for the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0035] Figure 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

[0036] Figure 2 is a schematic diagram of a control channel resource set;

[0037] Figure 3 is a schematic diagram of a search space and aggregation level;

[0038] Figure 4 is a schematic diagram of an interleaving mapping;

[0039] Figure 5 is a schematic diagram of two-stage SCI transmission and reception provided by an embodiment of the present application;

[0040] Figure 6 is a schematic diagram of the multiplexing relationship between PSCCH1 and PSCCH2;

[0041] Figure 7 is a flowchart of a resource indication method provided by an embodiment of the present application;

[0042] Figure 8 is a schematic diagram of PSCCH2 mapping provided by an embodiment of the present application;

[0043] Figure 9 is another schematic diagram of PSCCH2 mapping provided by an embodiment of the present application;

[0044] Figure 10It is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application;

[0045] Figure 11 It is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application;

[0046] Figure 12 It is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application;

[0047] Figure 13 It is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application;

[0048] Figure 14 It is a schematic structural diagram of a resource indication device provided by an embodiment of the present application

[0049] Figure 15 It is a schematic structural diagram of another resource indication device provided by an embodiment of the present application;

[0050] Figure 16 It is a schematic structural diagram of a terminal device proposed by an embodiment of the present application;

[0051] Figure 17 It is a schematic structural diagram of a network device proposed by an embodiment of the present application. Detailed implementation manners

[0052] The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0053] As Figure 1 shown, Figure 1 It is a schematic diagram of a communication system provided by an embodiment of the present application. The communication system includes a network device and at least one terminal device 103. Among them, the network device may include a core network device 101 and a radio access network device 102. The terminal device is connected to the radio access network device wirelessly, and the radio access network device is connected to the core network device wirelessly or by wire. The core network device and the radio access network device may be independent different physical devices, or the functions of the core network device and the logical functions of the radio access network device may be integrated on the same physical device, or the functions of part of the core network device and part of the radio access network device may be integrated on one physical device. The terminal device may be fixed in position or movable. Figure 1 It is only a schematic diagram, and other network devices may also be included in the communication system, such as wireless relay devices and wireless backhaul devices, which are not drawn in Figure 1 The embodiments of the present application do not limit the number of core network devices, radio access network devices, and terminal devices included in the mobile communication system.

[0054] A radio access network device is an access device through which a terminal device accesses the mobile communication system wirelessly. It can be a base station NodeB, an evolved Node B (eNodeB), a base station in a 5th generation mobile networks (5G) system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. The embodiments of this application do not limit the specific technologies and specific device forms adopted by the radio access network device.

[0055] The terminal device can also be referred to as a terminal, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc. The terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and so on.

[0056] The radio access network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on airplanes, balloons, and satellites in the air. The embodiments of this application do not limit the application scenarios of the radio access network device and the terminal device.

[0057] The embodiments of this application can be applicable to downlink signal transmission, can also be applicable to uplink signal transmission, and can also be applicable to device-to-device (D2D) signal transmission. For downlink signal transmission, the sending device is the radio access network device, and the corresponding receiving device is the terminal device. For uplink signal transmission, the sending device is the terminal device, and the corresponding receiving device is the radio access network device. For D2D signal transmission, the sending device is the terminal device, and the corresponding receiving device is also the terminal device. The embodiments of this application do not limit the transmission direction of the signal.

[0058] Communication can be carried out between a radio access network device and a terminal device, as well as between terminal devices, through licensed spectrum, or through unlicensed spectrum, or through both licensed spectrum and unlicensed spectrum simultaneously. Communication can be carried out between a radio access network device and a terminal device, as well as between terminal devices, through spectrum below 6G, or through spectrum above 6G, or through both spectrum below 6G and spectrum above 6G simultaneously. Embodiments of the present application do not limit the spectrum resources used between a radio access network device and a terminal device.

[0059] The following introduces the relevant background content of the control channel:

[0060] The control channel related information configured by the network device includes the following parameters:

[0061] 1. Control resource set (coreset), which represents the frequency domain and time domain information that the control channel may occupy, including frequency domain resources and time domain duration. Each time domain duration can include 1 - 3 orthogonal frequency division multiplexing (OFDM) symbols. As Figure 2 shown, Figure 2 is a schematic diagram of a control resource set provided by an embodiment of the present application. A, one time domain duration can include 3 OFDM symbols. B, one time domain duration can include 3 OFDM symbols. C, one time domain duration can include 1 OFDM symbol. Among them, the gray part is the occupied time domain resources and frequency domain resources.

[0062] 2. Search space and aggregation level

[0063] The search space represents the blind detection of the control channel within the defined space, and the unit of blind detection is carried out according to the aggregation level (AL). The unit of the aggregation level is the control-channel element (CCE). Each CCE has 6 resource element groups (REGs), and each REG consists of 1 resource block (RB). By introducing the search space and the aggregation level, the flexibility of the control channel transmission can be improved while reducing the complexity of the terminal detecting the control channel. As shown in Table 1, for 16 CCEs, when the aggregation level is 4, the PDCCH candidate positions are 4, that is, blind detection is performed at 4 candidate positions. When the aggregation level is 8, the PDCCH candidate positions are 2, and when the aggregation level is 16, the PDCCH candidate positions are 1.

[0064] Table 1 Search Space Parameter Table

[0065] CCE Aggregation Level PDCCH Candidate Position 4 4 8 2 16 1

[0066] As Figure 3 shown, Figure 3 is a schematic diagram of the search space and the aggregation level. During the current control channel transmission process, the control channel can use the fixed quadrature phase shift keying (QPSK) method. When the aggregation level is large (such as AL = 16), it occupies more resources (for example, 16 CCEs), and only needs to be blindly detected once, with a relatively low code rate, which is suitable for transmission in low signal-to-noise ratio situations. When the aggregation level is small (for example, AL = 4), it occupies fewer resources (such as 4 CCEs), and needs to be blindly detected 4 times, with a relatively high code rate, which is suitable for transmission in high signal-to-noise ratio situations.

[0067] 3. CCE-to-REG Mapping

[0068] The process of CCE-to-REG mapping is divided into two cases: interleaved mapping and non-interleaved mapping. Interleaved mapping is to perform CCE-to-REG mapping discontinuously according to certain rules, and non-interleaved mapping is to perform CCE-to-REG mapping continuously according to certain rules. As Figure 4 shown, Figure 4 is a schematic diagram of interleaved mapping. The formula of the interleaver is as follows:

[0069] where j = cR + r, r = 0, 1,..., R - 1, c = 0, 1,..., C - 1,

[0070] is the resource available for all CCEs. is the frequency-domain width (number of RBs) of the coreset. is the number of symbols of the coreset. L and R, n shift is configured by the base station.

[0071] Among them, the control channel is for the terminal device to receive the control information of the data channel. When transmitting based on the Uu interface (cellular link), the control channel content can be downlink control information (DCI). When transmitting based on the PC5 interface (sidelink), the control channel content is SCI. The control channel is used to support the reception or transmission of the service channels PDSCH or PUSCH. The sidelink control channel content can include: type indication, frequency-domain information of PSSCH, frequency-domain information of PSSCH, resource reservation indication, target address ID, source address ID, hybrid automatic repeat request (HARQ) process ID number, new data indication (NDI), data transmission redundancy version (RV), modulation and coding scheme (MCS), service priority indication (priority of QoS), cyclic redundancy check (CRC), etc.

[0072] The current standard discussion supports the use of two-level SCI for sending control channel information, abbreviated as two-level SCI. The first-level SCI carries the information for channel detection. That is, after all terminal devices receive this first-level SCI, they know on which link resources data will be sent. Thus, when the UE selects the time-domain and frequency-domain resources for sending data, it can perform resource avoidance to reduce interference. As Figure 5 shown, Figure 5 is a schematic diagram of the sending and receiving of two-level SCI provided by an embodiment of this application. On the network device side, first send the first-level SCI, then send the second-level SCI, and finally send the PSSCH data. On the terminal device side, first perform a blind detection on the first-level SCI. Blind detection means that the terminal device may need to try multiple times to receive until it receives a valid SCI or has traversed all possible attempts. If the first-level SCI is blindly detected, then receive the second-level SCI according to the first-level SCI. After parsing the second-level SCI, use the second-level SCI and the first-level SCI to receive the PSSCH.

[0073] As can be seen above, the terminal device needs to receive the first-level SCI through blind detection, and receive the second-level SCI through the indication information of the first-level SCI without blind detection. That is, the time domain position and frequency domain position of the second-level SCI need to be indicated by the first-level SCI. How to effectively indicate the time domain position and frequency domain position of the second-level SCI is a problem that needs to be solved by the standard. As Figure 6 shown Figure 6 is a schematic diagram of the multiplexing relationship between PSCCH1 and PSCCH2. Among them, PSCCH1 is used to carry the first-level SCI, and PSCCH2 is used to carry the second-level SCI. PSCCH1 and PSCCH2 are adjacent or frequency division multiplexed, ensuring that after the first-level SCI is decoded, PSCCH2 is received as soon as possible, and the second-level SCI is decoded, so as to receive the PSSCH channel with the minimum delay. However, this method is relatively single and not flexible enough. To solve the above technical problems, the embodiments of the present application provide the following solutions.

[0074] As Figure 7 shown Figure 7 is a schematic flowchart of a resource indication method provided by an embodiment of the present application. The steps in the embodiments of the present application at least include:

[0075] It should be noted that the following first control information and second control information jointly determine the scheduling of a service channel. When transmitting based on the Uu interface, the first control information may refer to the first part of the downlink control information (DCI), or PDCCH-1 for short, and the second control information may refer to the second part of the DCI, or PDCCH-2 for short. The data channel scheduled by them may be PDSCH or PUSCH. When transmitting based on the PC-5 interface of the side link, the first control information may refer to the first part of the SCI, or PSCCH-1 for short, and the second control information may refer to the second part of the SCI, or PSCCH-2 for short. The data channel scheduled by them may be PSSCH. In the following embodiments, the side link is taken as an example for description.

[0076] S701, the network device sends the first indication information and the first control information to the terminal device, and the terminal device receives the first indication information and the first control information sent by the network device. Among them, the first control information may be DCI or SCI. The first indication information may be configuration information. The following are several optional methods, including but not limited to:

[0077] In an embodiment of the present application, the network device may first send first indication information and then send first control information. Alternatively, it may also first send first control information and then send first indication information. The timing positions of the first indication information and the first control information are not limited.

[0078] In one implementation, the first indication information includes time-domain factors for resource configuration, and the time-domain factors for resource configuration include at least one of the size of the subcarrier spacing (SCS), the configuration of additional demodulation reference signals (DMRS) in the DMRS pattern, and the feedback situation of hybrid automatic repeat request acknowledgment (HARQ-ACK).

[0079] Among them, the first indication information further includes time-domain information and frequency-domain information. The time-domain information includes the reference time-domain position and other time-domain related information. The reference time-domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time-domain resource; the frequency-domain information includes the reference frequency-domain position and other frequency-domain related information, and the reference frequency-domain position includes at least one of the frequency-domain start position of the first control information, the frequency-domain start position of the control channel, and the frequency-domain center position of the data channel.

[0080] Among them, the first indication information further includes the offset relative to the reference time-domain position.

[0081] Among them, the time-domain factors for resource configuration, the reference time-domain position, and the offset relative to the reference time-domain position in the first indication information correspond to each other.

[0082] For example, as shown in Table 2, the configuration information includes the time-domain factors of resource configuration (the size of the subcarrier spacing), the reference time-domain position (the last symbol position occupied by PSCCH1), and the offset relative to the reference time-domain position. l0 represents the last symbol position occupied by PSCCH1, and k0, k1, k2, k3, k4 represent the offsets of the second SCI relative to the last symbol position occupied by PSCCH1. When the terminal device currently supports SCS = 15KHz, the second SCI can be received according to the configuration information in the first row of Table 2, and the second SCI is received after shifting backward by k0 symbols at the last symbol position l0 occupied by PSCCH1. Among them, the larger the subcarrier spacing, the larger the value of the offset. For example, when SCS = 15KHz, the offset can take values of 1 or 2. When SCS = 30KHz, the offset can take values of 2, 3, 4, 7, or 9, etc. The values of k0, k1, k2, k3, k4 are all non-negative integers, and typical values are, for example: k0 = 2, k1 = 4, k2 = 7, k3 = 7, k4 = 7, or the values are: k0 = 1, k1 = 3, k2 = 6, k3 = 6, k4 = 6.

[0083] It should be noted that only the above 5 cases are listed in the table for the size of the subcarrier spacing SCS. When the size of the subcarrier spacing SCS is other values, the offset can be changed accordingly. For example, when the value of the subcarrier spacing SCS is 7.5KHz, 3.75KHz, or 480KHz, the offset can be changed accordingly. In addition, l0 can also represent the time-domain start position of the data channel (such as the PSSCH data channel), can also represent the time-domain resource position occupied by the DMRS, or can also represent the boundary position of the time-domain resource. Taking the boundary position of the time-domain resource as an example, if SCS = 30KHz, starting from the start position of the time-domain resource (the 0th symbol), shifting backward by k1 symbols, and the (k1 + 1)th symbol position is the time-domain start position of the second SCI.

[0084] Table 2

[0085] Time Domain Factor of Resource Allocation Symbol Position Remarks SCS = 15KHz l0+k0 l0 is the last symbol position occupied by PSCCH1 SCS = 30KHz l0+k1 l0 is the last symbol position occupied by PSCCH1 SCS = 60KHz l0+k2 l0 is the last symbol position occupied by PSCCH1 SCS = 120KHz l0+k3 l0 is the last symbol position occupied by PSCCH1 SCS = 240KHz l0+k4 l0 is the last symbol position occupied by PSCCH1

[0086] For example, as shown in Table 3, the configuration information includes resource configuration time-domain factors (configuration of additional DMRS in the demodulation reference signal DMRS mode or feedback of acknowledgment information for hybrid automatic repeat request), reference time-domain position (PSCCH1 occupies the last symbol position), and offset relative to the reference time-domain position. l0 represents that PSCCH1 occupies the last symbol position, and k0, k1, k2, k3, k4 represent the offsets of the second SCI relative to the last symbol position occupied by PSCCH1. For example, when the terminal device supports additional DMRS in the DMRS pattern, the second SCI can be received according to the configuration information in the second row of Table 3, and the second SCI is received after shifting k1 symbols backward from the last symbol position occupied by PSCCH1. Another example is that when the terminal device supports HARQ-ACK feedback, the second SCI is received according to the configuration information in the fourth row, and the second SCI is received after shifting k3 symbols backward from the last symbol position occupied by PSCCH1. Additionally, l0 can also represent the time-domain starting position of the data channel (such as the PSSCH data channel), can also represent the time-domain resource position occupied by the DMRS, or can also represent the boundary position of the time-domain resources.

[0087] Table 3

[0088]

[0089] If the configuration information includes the size of the SCS, the configuration of additional DMRS in the demodulation reference signal DMRS mode, or the feedback of acknowledgment information for hybrid automatic repeat request, the terminal device can select the maximum value among the symbol positions corresponding to the above three pieces of configuration information. For example, the terminal device supports SCS = 15KHz, the DMRS pattern contains additional DMRS, and HARQ-ACK feedback. If the time-domain starting position of the second SCI corresponding to SCS = 15KHz is the 6th character, the time-domain starting position of the second SCI corresponding to the DMRS pattern containing additional DMRS is the 4th character, and the time-domain starting position of the second SCI corresponding to HARQ-ACK feedback is the 8th character, then the 8th symbol can be selected as the time-domain starting position of the second SCI.

[0090] In another implementation, the first indication information includes resource configuration time-domain factors and the reference time-domain position. Among them, the resource configuration time-domain factors correspond to the reference time-domain position. The first control information includes the offset relative to the reference time-domain position. Among them, the resource configuration time-domain factors, the reference time-domain position, and the offset relative to the reference time-domain position can refer to the above description.

[0091] In another implementation, the first indication information includes a time-domain factor of resource configuration and an offset relative to the reference time-domain position, where the time-domain factor of resource configuration corresponds to the offset relative to the reference time-domain position. The first control information includes the reference time-domain position. The time-domain factor of resource configuration, the reference time-domain position, and the offset relative to the reference time-domain position may refer to the above description.

[0092] Optionally, the network device may send the first indication information to the terminal device through high-layer signaling, and the high-layer signaling may include a system broadcast message, a radio resource control (RRC) message, etc. The configuration information may also be clearly specified by the protocol.

[0093] S702, the terminal device determines the time-domain start position and the frequency-domain start position of the second control information according to the first indication information and the first control information.

[0094] Specifically, the time-domain start position of the second control information is determined according to the reference time-domain position and the offset relative to the reference time-domain position. The following optional methods may be included:

[0095] In one implementation, the terminal device may first determine the time-domain factor of resource configuration currently supported. For example, by blindly detecting the first SCS, the size of the currently supported SCS can be obtained, or it can be obtained from the system configuration whether the terminal device supports HARQ-ACK feedback. Then, the offset relative to the reference time-domain position and the reference time-domain position corresponding to the time-domain factor of resource configuration are found from the first indication information. For example, if it is determined by blindly detecting the first SCS that the size of the currently supported CSC of the terminal device is 120 KHz, then from the configuration information in the 4th row of Table 2 above, it is determined that the offset of the second SCI from the last symbol position occupied by PSCCH1 is k3. Another example is that if it is obtained from the system configuration that the terminal device supports HARQ-ACK feedback, then from the configuration information in the 4th row of Table 3 above, it is determined that the offset of the second SCI from the last symbol position occupied by PSCCH1 is k3. Finally, the time-domain start position of the second control information is determined according to the offset relative to the reference time-domain position and the reference time-domain position.

[0096] In another implementation, the terminal device may first determine the time-domain factor of resource configuration currently supported, then find the reference time-domain position corresponding to the time-domain factor of resource configuration from the first indication information, and then determine the time-domain start position of the second control information according to the offset relative to the reference time-domain position included in the first control information and the found reference time-domain position. Similar to the above, examples will not be given one by one here.

[0097] In another implementation, the terminal device may first determine the time domain factor of the resource configuration supported currently, then find the offset relative to the reference time domain position corresponding to the time domain factor of the resource configuration from the first indication information, and then determine the time domain start position of the second control information according to the reference time domain position indicated by the first control information and the found offset relative to the reference time domain position.

[0098] For example, it is indicated by the first SCI that PSCCH1 occupies the last symbol position l0. After receiving the first SCI, the terminal device resolves that PSCCH1 occupies the last symbol position l0. Or it is set by default in the system that PSCCH1 occupies the last symbol position l0, such as starting from the 0th symbol, or the 1st symbol, or the 2nd symbol, or the 3rd symbol by default in the system. The terminal device determines the time domain start position of the second SCI according to the last symbol position occupied by PSCCH1 and the found offset k3 of the second SCI relative to the last symbol position occupied by PSCCH1, that is, shifting backward the offset k3 relative to the reference time domain position from the last symbol position l0 occupied by PSCCH1, and taking the (l0 + k3 + 1)th symbol position as the time domain start position of PSCCH2 of the second SCI.

[0099] Optionally, the network device may map the second control information to the frequency domain resources according to the frequency domain start position of the second control information, the number of frequency domain resources occupied by the second control information, and the number of copies of the frequency domain resources. Wherein, the frequency domain resource unit may be CCE, sub-channel number, resource block (RB), or resource element (RE).

[0100] Assume that the number of frequency domain resources occupied by PSCCH2 is R, the first-level SCI indicates that the frequency domain start position of PSSCH2 is k, and there are a total of N copies of frequency domain resources. The following examples illustrate various situations.

[0101] For example, as Figure 8 shown, Figure 8 is a schematic diagram of PSCCH2 mapping provided by an embodiment of the present application. When the number R of frequency domain resources of PSCCH2 is not greater than N, that is, all PSCCH2 can be mapped to the lth symbol. The first SCI indicates the frequency domain start position k of the second SCI, and the time domain start position l of the second SCI is determined by the above steps. Therefore, starting from the frequency domain start position k and the time domain start position l, mapping starts from bottom to top, and the value of k increases continuously until all PSCCH2 are mapped to the lth symbol.

[0102] When the number R of frequency-domain resources of PSCCH2 is greater than N, that is, all PSCCH2 need to be mapped to at least two symbols (the l-th symbol and the l + 1-th symbol). When there is a DMRS on the l + 1-th symbol, the terminal device can map the second SCI according to the frequency-domain resource position occupied by the DMRS. The following are several mapping methods.

[0103] In one implementation, on the l + 1-th symbol, no PSCCH2 resource mapping is performed at the RE position of the DMRS. For example, as Figure 9 shown, Figure 9 is another schematic diagram of PSCCH2 mapping provided by an embodiment of the present application. There are a total of R = N + 2 REs for PSCCH2, and N PSCCH2 can be mapped on the l-th OFDM symbol. On the (k + 1)-th RE of the l + 1-th OFDM symbol, there is a DMRS pilot mapping. Therefore, no PSCCH2 mapping is performed on the (k + 1)-th RE of the l + 1-th OFDM symbol, and the PSCCH2 is mapped to the k-th and (k + 2)-th REs of the l + 1-th OFDM symbol.

[0104] In another implementation, on the l + 1-th symbol, at the RE position with a DMRS, when the DMRS symbol is not a preamble DMRS (the first-column DMRS of PSSCH), the mapping of the DMRS can be not performed and replaced by PSCCH2. For example, as Figure 10 shown, Figure 10 is another schematic diagram of PSCCH2 mapping provided by an embodiment of the present application. There are a total of R = N + 2 REs for PSCCH2, and N PSCCH2 can be mapped on the l-th OFDM symbol. On the (k + 1)-th RE of the l + 1-th OFDM symbol, there is a DMRS pilot mapping. The PSCCH2 can be mapped to the k-th and (k + 1)-th REs of the l + 1-th OFDM symbol, and no DMRS mapping is performed on the (k + 1)-th RE of the l + 1-th OFDM symbol.

[0105] In another implementation, if there is a DMRS pilot mapping on the l + 1 symbol, then the PSCCH2 resource mapping is performed on the l + 2 symbol. For example, as Figure 11 shown, Figure 11 is another schematic diagram of PSCCH2 mapping provided by an embodiment of the present application. There are a total of R = N + 2 REs for PSCCH2, and N PSCCH2 can be mapped on the l-th OFDM symbol. On the (k + 1)-th RE of the l + 1-th OFDM symbol, there is a DMRS pilot mapping. Therefore, the remaining 2 PSCCH2 can be mapped to the l + 2-th OFDM symbol.

[0106] Optionally, the second control information and the scheduled data channel can be resource-mapped in a frequency-division multiplexing manner. That is, PSCCH2 preferentially occupies the same frequency-domain k position on different symbols. This not only ensures simple data mapping and demodulation, but also allows more transmit power to be allocated on the control channel. Among them, the width of the frequency-domain resources occupied by PSCCH2 is R / l, where l is the number of time-domain resources that PSCCH2 can occupy. For example, as Figure 12 shown, Figure 12 Figure Figure 12 is another schematic diagram of PSCCH2 mapping provided by an embodiment of the present application. PSCCH2 can be mapped to the (N - 1)th and (N - 2)th frequency-domain resources, and PSSCH can be mapped to the kth to (N - 3)th frequency-domain resources.

[0107] Optionally, the second control information can be mapped to the middle position of the frequency domain of the data channel. This can reduce out-of-band leakage of adjacent frequency bands, thereby improving the decoding performance of PSCCH. For example, as Figure 13 shown, Figure 13 Figure Figure 13 is another schematic diagram of PSCCH2 mapping provided by an embodiment of the present application. PSCCH2 can be mapped to the (k + 2)th to (k + 4)th frequency-domain resources, and PSSCH can be mapped to other frequency-domain resources. The frequency-domain resources occupied by PSCCH2 are located in the middle of the frequency-domain resources occupied by PSSCH. For example, if PSCCH2 occupies X frequency-domain resources, PSSCH occupies N frequency-domain resources, and the starting frequency position is k, then the starting frequency-domain resource of PSCCH2, k_pscch2 = k + floor(X / 2) - floor(N / 2), where floor represents rounding down.

[0108] Optionally, there are three methods for whether PSCCH2 adopts VRB-to-PRB mapping interleaving:

[0109] 1. The protocol does not support VRB to PRB interleaving mapping.

[0110] 2. VRB to PRB interleaving mapping is supported, but whether to perform VRB to PRB interleaving mapping is configured by a higher layer. For example, when PSCCH2_interleave is configured as TRUE, interleaving is supported; otherwise, it is not supported. The relevant interleaving configuration can be associated with a resource pool, that is, it is determined whether to support VRB to PRB interleaving in units of resource pools.

[0111] 3. Whether it is interleaved and consistent with PSSCH, that is, if PSSCH adopts the VRB to PRB mapping process, then PSCCH2 also adopts the VRB to PRB mapping process. If PSSCH does not adopt the VRB to PRB mapping, then PSCCH2 also does not adopt the VRB to PRB mapping process. Whether PSSCH adopts the VRB to PRB mapping process can be indicated by SCI or configured by higher layer signaling. For example, the VRB to PRB mapping indication is indicated in SCI and acts on both PSSCH and PSCCH2 at the same time.

[0112] Optionally, whether PSCCH2 CCE adopts CCE-to-REG interleaved mapping includes the following three methods:

[0113] 1. The protocol does not support CCE-to-REG interleaved mapping.

[0114] 2. CCE-to-REG interleaved mapping is supported, but whether to perform CCE-to-REG interleaved mapping can be configured by higher layer signaling.

[0115] 3. Be consistent with the method of PSCCH1, that is, if PSCCH1 adopts the CCE-to-REG interleaved mapping process, then PSCCH2 also adopts the CCE-to-REG interleaved mapping process. If PSCCH1 does not adopt the CCE-to-REG interleaved mapping process, then PSCCH2 also does not adopt the CCE-to-REG interleaved mapping process.

[0116] Optionally, after the network device maps the second control information to the frequency domain resource, it sends the second control information to the terminal device. The terminal device can determine the frequency domain starting position of the second control information in the following ways: the first control information includes the frequency domain starting position of the second control information. After receiving the first control information, the terminal device can determine it according to the frequency domain starting position of the second control information included in the first control information. Or, the terminal device obtains the frequency domain starting position of the first control information through blind detection; then uses the frequency domain starting position of the first control information as the frequency domain starting position of the second control information.

[0117] S703. The terminal device receives the second control information sent by the network device according to the time domain starting position and the frequency domain starting position of the second control information. Finally, according to the received first control information and second control information, it receives the data channel sent by the network device.

[0118] In the embodiments of the present application, the terminal device determines the time domain starting position of the second control information based on at least one of the size of the subcarrier spacing, the configuration of the additional DMRS in the demodulation reference signal, and the feedback of the acknowledgement information of the hybrid automatic repeat request. This not only improves the flexibility of the resource indication of the second control information, but also enables the correct reception of the second control information, which can effectively serve as the reception pilot of the data channel, thereby improving the reception performance of the data channel. And the frequency domain information of the second control information is indicated, so that the terminal device can correctly receive the second control information.

[0119] The method in the embodiments of the present application is elaborated in detail above. The device in the embodiments of the present application is provided below.

[0120] As Figure 14 shown, Figure 14 FIG. 10 is a schematic structural diagram of a resource indication device provided by an embodiment of the present application. The device may include a receiving module 1401 and a processing module 1402. The detailed description of each module is as follows.

[0121] The receiving module 1401 is configured to receive the first indication information and the first control information sent by the network device;

[0122] The processing module 1402 is configured to determine the time domain starting position and the frequency domain starting position of the second control information according to the first indication information and the first control information;

[0123] The receiving module 1401 is further configured to receive the second control information sent by the network device according to the time domain starting position and the frequency domain starting position of the second control information.

[0124] Optionally, the time domain starting position of the second control information is determined according to a reference time domain position and an offset relative to the reference time domain position.

[0125] Wherein, the first indication information includes the offset relative to the reference time domain position.

[0126] Wherein, the first indication information includes time domain information and frequency domain information.

[0127] Wherein, the time domain information includes the reference time domain position, and the reference time domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource;

[0128] The frequency domain information includes a reference frequency domain position, and the reference frequency domain position includes at least one of a frequency domain start position of the first control information, a frequency domain start position of a control channel, and a frequency domain center position of a data channel.

[0129] Wherein, the first indication information further includes a time domain factor for resource configuration, and the time domain factor for resource configuration includes at least one of a size of a subcarrier spacing (SCS), a configuration of additional demodulation reference signals (DMRS) in a DMRS mode, and a feedback situation of an acknowledgement information of a hybrid automatic repeat request (HARQ).

[0130] Optionally, the processing module 1402 is further configured to determine the currently supported time domain factor for resource configuration; find, from the first indication information, an offset relative to the reference time domain position and the reference time domain position corresponding to the time domain factor for resource configuration; and determine a time domain start position of the second control information according to the offset relative to the reference time domain position and the reference time domain position.

[0131] Wherein the first control information includes a frequency domain start position of the second control information.

[0132] Optionally, the processing module 1402 is further configured to obtain, through blind detection, a frequency domain start position of the first control information; and use the frequency domain start position of the first control information as the frequency domain start position of the second control information.

[0133] It should be noted that the implementation of each module may also correspond to the corresponding description in the Figure 7 method embodiment shown, and execute the methods and functions performed by the terminal device in the above embodiment.

[0134] As Figure 15 shown, Figure 15 FIG. is a schematic structural diagram of another resource indication device provided in an embodiment of the present application. The device may include a sending module 1501 and a processing module 1502. The detailed descriptions of each module are as follows.

[0135] The sending module 1501 is configured to send first indication information and first control information to a terminal device. The first indication information and the first control information are used for the terminal device to determine a time domain start position and a frequency domain start position of second control information, and the time domain start position and the frequency domain start position of the second control information are used for the terminal device to receive the second control information sent by the network device.

[0136] Wherein, the time domain start position of the second control information is determined according to a reference time domain position and an offset relative to the reference time domain position.

[0137] Wherein, the first indication information includes an offset relative to the reference time domain position.

[0138] Wherein, the first indication information includes time domain information and frequency domain information.

[0139] Wherein, the time domain information includes the reference time domain position, and the reference time domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource;

[0140] The frequency domain information includes a reference frequency domain position, and the reference frequency domain position includes at least one of the frequency domain start position of the first control information, the frequency domain start position of the control channel, and the frequency domain center position of the data channel.

[0141] Wherein, the first indication information further includes a time domain factor for resource configuration, and the time domain factor for resource configuration includes at least one of the size of the subcarrier spacing SCS, the configuration of additional DMRS in the DMRS mode, and the feedback situation of the acknowledgement information of the hybrid automatic repeat request.

[0142] Wherein, the first control information includes the frequency domain start position of the second control information.

[0143] Optionally, the processing module 1502 is configured to map the second control information to the frequency domain resource according to the frequency domain start position of the second control information, the number of frequency domain resources occupied by the second control information, and the number of copies of the frequency domain resource.

[0144] Optionally, the processing module 1502 is further configured to obtain the frequency domain resource position occupied by the DMRS; and map the second control information according to the frequency domain resource position occupied by the DMRS.

[0145] It should be noted that the implementation of each module can also correspond to the corresponding description of the method embodiment shown in Figure 7 and execute the methods and functions performed by the network device in the above embodiments.

[0146] Please continue to refer to Figure 16 , Figure 16 which is a schematic structural diagram of a terminal device proposed in an embodiment of the present application. As Figure 16 shown, the terminal device may include: at least one processor 1601, at least one communication interface 1602, at least one memory 1603, and at least one communication bus 1604.

[0147] Among them, the processor 1601 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in connection with the disclosure of this application. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. The communication bus 1604 can be a peripheral component interconnect standard PCI bus or an extended industry standard architecture EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 16 only a thick line is shown in Figure 16 , but it does not mean that there is only one bus or one type of bus. The communication bus 1604 is used to implement the connection and communication between these components. Among them, the communication interface 1602 of the device in the embodiment of this application is used to communicate signaling or data with other node devices. The memory 1603 can include volatile memory, such as nonvolatile random access memory (NVRAM), phase change RAM (PRAM), magnetoresistive RAM (MRAM), etc., and can also include nonvolatile memory, such as at least one disk storage device, electrically erasable programmable read-only memory (EEPROM), flash memory devices, such as NOR flash memory or NAND flash memory, semiconductor devices, such as solid state disk (SSD), etc. Optionally, the memory 1603 can also be at least one storage device located far from the aforementioned processor 1601. Optionally, a set of program codes can also be stored in the memory 1603, and the processor 1601 can optionally execute the programs executed in the memory 1603.

[0148] Receive the first indication information and the first control information sent by the network device;

[0149] The device determines the time-domain start position and the frequency-domain start position of the second control information according to the first indication information and the first control information;

[0150] Receive the second control information sent by the network device according to the time-domain start position and the frequency-domain start position of the second control information.

[0151] Among them, the time-domain start position of the second control information is determined according to a reference time-domain position and an offset relative to the reference time-domain position.

[0152] Among them, the first indication information includes the offset relative to the reference time-domain position.

[0153] Among them, the first indication information includes time-domain information and frequency-domain information.

[0154] Among them, the time-domain information includes the reference time-domain position, and the reference time-domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time-domain resource;

[0155] The frequency-domain information includes a reference frequency-domain position, and the reference frequency-domain position includes at least one of the frequency-domain start position of the first control information, the frequency-domain start position of the control channel, and the frequency-domain center position of the data channel.

[0156] Among them, the first indication information further includes a time-domain factor for resource configuration, and the time-domain factor for resource configuration includes at least one of the size of the subcarrier spacing SCS, the configuration of additional DMRS in the DMRS mode, and the feedback situation of the acknowledgement information of the hybrid automatic repeat request.

[0157] Optionally, the processor 1601 is further configured to perform the following operations:

[0158] Determine the currently supported time-domain factor for resource configuration;

[0159] Find, from the first indication information, the offset relative to the reference time-domain position and the reference time-domain position corresponding to the time-domain factor for resource configuration;

[0160] Determine the time-domain start position of the second control information according to the offset relative to the reference time-domain position and the reference time-domain position.

[0161] Among them, the first control information includes the frequency-domain start position of the second control information.

[0162] Optionally, the processor 1601 is further configured to perform the following operations:

[0163] Obtain the frequency-domain start position of the first control information through blind detection;

[0164] Use the frequency-domain start position of the first control information as the frequency-domain start position of the second control information.

[0165] Further, the processor can also cooperate with the memory and the communication interface to perform the operations of the terminal device in the above application embodiments.

[0166] Please continue to refer to Figure 17 , Figure 17 FIG. is a schematic structural diagram of a network device proposed in an embodiment of the present application. As shown in the figure, the network device may include: at least one processor 1701, at least one communication interface 1702, at least one memory 1703, and at least one communication bus 1704.

[0167] Among them, the processor 1701 may be various types of processors mentioned above. The communication bus 1704 may be a peripheral component interconnect standard PCI bus or an extended industry standard architecture EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For the sake of representation, Figure 17 only a thick line is shown in, but it does not mean that there is only one bus or one type of bus. The communication bus 1704 is used to implement the connection and communication between these components. Among them, the communication interface 1702 of the device in the embodiment of the present application is used to communicate signaling or data with other node devices. The memory 1703 may be various types of memories mentioned above. Optionally, the memory 1703 may further be at least one storage device located far from the aforementioned processor 1701. A set of program codes is stored in the memory 1703, and the processor 1701 executes the programs in the memory 1703.

[0168] Send first indication information and first control information to the terminal device, where the first indication information and the first control information are used for the terminal device to determine the time domain start position and the frequency domain start position of the second control information, and the time domain start position and the frequency domain start position of the second control information are used for the terminal device to receive the second control information sent by the network device.

[0169] Among them, the time domain start position of the second control information is determined according to a reference time domain position and an offset relative to the reference time domain position.

[0170] Among them, the first indication information includes the offset relative to the reference time domain position.

[0171] Among them, the first indication information includes time domain information and frequency domain information.

[0172] Among them, the time domain information includes the reference time domain position, and the reference time domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource;

[0173] The frequency domain information includes a reference frequency domain position, and the reference frequency domain position includes at least one of a frequency domain start position of the first control information, a frequency domain start position of a control channel, and a frequency domain center position of a data channel.

[0174] Wherein, the first indication information further includes a time domain factor of resource configuration, and the time domain factor of resource configuration includes at least one of a size of a subcarrier spacing SCS, a configuration of additional DMRS in a demodulation reference signal DMRS mode, and a feedback situation of an acknowledgement information of a hybrid automatic repeat request.

[0175] Wherein, the first control information includes a frequency domain start position of the second control information.

[0176] Optionally, the processor 1601 is further configured to perform the following operations:

[0177] Map the second control information to frequency domain resources according to the frequency domain start position of the second control information, the number of frequency domain resources occupied by the second control information, and the number of copies of the frequency domain resources.

[0178] Optionally, the processor 1701 is further configured to perform the following operations:

[0179] Obtain a frequency domain resource position occupied by DMRS;

[0180] Map the second control information according to the frequency domain resource position occupied by the DMRS.

[0181] Further, the processor may further cooperate with a memory and a communication interface to perform the operations of the network device in the foregoing application embodiments.

[0182] An embodiment of the present application further provides a chip system, which includes a processor for supporting a terminal device or a network device to implement the functions involved in any of the foregoing embodiments, such as generating or processing data and / or information involved in the foregoing method. In a possible design, the chip system may further include a memory for storing necessary program instructions and data for the terminal device or the network device. The chip system may be composed of chips or may include chips and other discrete devices.

[0183] An embodiment of the present application further provides a processor for being coupled to a memory and configured to execute any method and function related to a terminal device or a network device in any of the foregoing embodiments.

[0184] The embodiments of the present application also provide a computer program product which, when running on a computer, causes the computer to execute any method and function related to a terminal device or a network device in any of the above embodiments.

[0185] The embodiments of the present application also provide a communication device for executing any method and function related to a terminal device or a network device in any of the above embodiments.

[0186] The embodiments of the present application also provide a communication system, which includes at least one terminal device and at least one network device involved in any of the above embodiments.

[0187] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that the computer can access, or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

[0188] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A resource indication method, characterized in that, The method includes: The terminal device receives first indication information and first control information sent by a network device, where the first indication information includes a time-domain factor for resource configuration, and the time-domain factor for resource configuration includes at least one of the size of a subcarrier spacing (SCS), the configuration of additional demodulation reference signals (DMRS) in a DMRS mode, and the feedback situation of acknowledgment information for hybrid automatic repeat request (HARQ). The terminal device determines a time-domain start position and a frequency-domain start position of second control information according to the first indication information and the first control information. The terminal device receives the second control information sent by the network device according to the time-domain start position and the frequency-domain start position of the second control information.

2. The method according to claim 1, wherein The time-domain start position of the second control information is determined according to a reference time-domain position and an offset relative to the reference time-domain position.

3. The method according to claim 2, characterized in that The first indication information includes the offset relative to the reference time-domain position.

4. The method according to claim 3, characterized in that, The first indication information includes time-domain information and frequency-domain information.

5. The method according to claim 4, characterized in that, The time-domain information includes the reference time-domain position, and the reference time-domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of a data channel, the first symbol position of a demodulation reference signal (DMRS), and the boundary position of time-domain resources. The frequency-domain information includes a reference frequency-domain position, and the reference frequency-domain position includes at least one of the frequency-domain start position of the first control information, the frequency-domain start position of a control channel, and the frequency-domain center position of a data channel.

6. The method according to claim 5, characterized in that The terminal device determining the time-domain start position and the frequency-domain start position of the second control information according to the first indication information and the first control information includes: The terminal device determines the time-domain factor for resource configuration that it currently supports. The terminal device searches in the first indication information for the offset relative to the reference time-domain position and the reference time-domain position corresponding to the time-domain factor for resource configuration. The terminal device determines the time-domain start position of the second control information according to the offset relative to the reference time-domain position and the reference time-domain position.

7. The method according to any one of claims 1-6, characterized in that The first control information includes the frequency-domain start position of the second control information.

8. The method according to any one of claims 1 to 6, characterized in that, The method further includes: The terminal device obtains the frequency-domain start position of the first control information through blind detection. The terminal device uses the frequency-domain start position of the first control information as the frequency-domain start position of the second control information.

9. A resource indication method, characterized in that, The method includes: The network device sends first indication information and first control information to the terminal device. The first indication information includes a time-domain factor for resource configuration, and the time-domain factor for resource configuration includes at least one of the size of the subcarrier spacing (SCS), the configuration of additional demodulation reference signals (DMRS) in the DMRS mode, and the feedback situation of the acknowledgement information of hybrid automatic repeat request (HARQ). The first indication information and the first control information are used for the terminal device to determine the time-domain starting position and the frequency-domain starting position of the second control information. The time-domain starting position and the frequency-domain starting position of the second control information are used for the terminal device to receive the second control information sent by the network device.

10. The method according to claim 9, characterized in that, The time-domain starting position of the second control information is determined according to a reference time-domain position and an offset relative to the reference time-domain position.

11. The method according to claim 10, wherein The first indication information includes the offset relative to the reference time-domain position.

12. The method according to claim 11, wherein The first indication information includes time-domain information and frequency-domain information.

13. The method according to claim 12, wherein The time-domain information includes the reference time-domain position, and the reference time-domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, the first symbol position of the demodulation reference signal (DMRS), and the boundary position of the time-domain resource. The frequency-domain information includes a reference frequency-domain position, and the reference frequency-domain position includes at least one of the frequency-domain starting position of the first control information, the frequency-domain starting position of the control channel, and the frequency-domain center position of the data channel.

14. The method according to any one of claims 9 to 13, characterized in that, The first control information includes the frequency-domain starting position of the second control information.

15. The method according to any one of claims 9-13, characterized in that, The method further includes: The terminal device maps the second control information to the frequency-domain resource according to the frequency-domain starting position of the second control information, the number of frequency-domain resources occupied by the second control information, and the number of copies of the frequency-domain resource.

16. The method according to claim 15, wherein The terminal device mapping the second control information to the frequency-domain resource according to the frequency-domain starting position of the second control information, the number of frequency-domain resources occupied by the second control information, and the number of copies of the frequency-domain resource includes: The terminal device obtains the frequency-domain resource position occupied by the DMRS. The terminal device maps the second control information according to the frequency-domain resource position occupied by the DMRS.

17. A resource indicating device, characterized in that, The apparatus includes: A receiving module, configured to receive the first indication information and the first control information sent by the network device. The first indication information includes a time-domain factor for resource configuration, and the time-domain factor for resource configuration includes at least one of the size of the subcarrier spacing (SCS), the configuration of additional demodulation reference signals (DMRS) in the DMRS mode, and the feedback situation of the acknowledgement information of hybrid automatic repeat request (HARQ). A processing module, configured to determine the time-domain starting position and the frequency-domain starting position of the second control information according to the first indication information and the first control information. The receiving module is further configured to receive the second control information sent by the network device according to the time-domain starting position and the frequency-domain starting position of the second control information.

18. The device according to claim 17, wherein The time domain start position of the second control information is determined according to a reference time domain position and an offset relative to the reference time domain position.

19. The device according to claim 18, characterized in that, The first indication information includes the offset relative to the reference time domain position.

20. The device according to claim 19, characterized in that, The first indication information includes time domain information and frequency domain information.

21. The device according to claim 20, wherein, The time domain information includes the reference time domain position, and the reference time domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource. The frequency domain information includes a reference frequency domain position, and the reference frequency domain position includes at least one of the frequency domain start position of the first control information, the frequency domain start position of the control channel, and the frequency domain center position of the data channel.

22. The device according to claim 21, wherein the processing module is further configured to determine the time domain factor of the currently supported resource configuration; find the offset relative to the reference time domain position and the reference time domain position corresponding to the time domain factor of the resource configuration from the first indication information; and determine the time domain start position of the second control information according to the offset relative to the reference time domain position and the reference time domain position.

23. The device according to any one of claims 17-22, characterized in that, The first control information includes the frequency domain start position of the second control information.

24. The device according to any one of claims 17-22, wherein the processing module is further configured to obtain the frequency domain start position of the first control information by blind detection; and use the frequency domain start position of the first control information as the frequency domain start position of the second control information.

25. A resource indicating device, characterized in that, The device includes: a sending module, configured to send first indication information and first control information to a terminal device, where the first indication information includes a time domain factor of resource configuration, and the time domain factor of resource configuration includes at least one of the size of the subcarrier spacing SCS, the configuration of additional DMRS in the demodulation reference signal DMRS mode, and the feedback situation of the acknowledgement information of the hybrid automatic repeat request; the first indication information and the first control information are used for the terminal device to determine the time domain start position of the second control information and the frequency domain start position of the second control information, and the time domain start position of the second control information and the frequency domain start position of the second control information are used for the terminal device to receive the second control information sent by the network device.

26. The device according to claim 25, characterized in that, The time domain start position of the second control information is determined according to a reference time domain position and an offset relative to the reference time domain position.

27. The device according to claim 26, wherein, The first indication information includes the offset relative to the reference time domain position.

28. The device according to claim 27, characterized in that, The first indication information includes time domain information and frequency domain information.

29. The device according to claim 28, wherein, The time domain information includes the reference time domain position, and the reference time domain position includes at least one of the last symbol position of the first control information, the first symbol position of the first control information, the first symbol position of the data channel, the first symbol position of the demodulation reference signal DMRS, and the boundary position of the time domain resource. The frequency-domain information includes a reference frequency-domain position, and the reference frequency-domain position includes at least one of a frequency-domain start position of the first control information, a frequency-domain start position of a control channel, and a frequency-domain center position of a data channel.

30. The device according to any one of claims 25-29, characterized in that, The first control information includes a frequency-domain start position of the second control information.

31. The device according to any one of claims 25-29, characterized in that, The apparatus further includes: a processing module, configured to map the second control information to frequency-domain resources according to a frequency-domain start position of the second control information, a quantity of frequency-domain resources occupied by the second control information, and a number of copies of frequency-domain resources.

32. The apparatus according to claim 31, wherein the processing module is further configured to obtain a frequency-domain resource position occupied by DMRS; and map the second control information according to the frequency-domain resource position occupied by DMRS.

33. A terminal device, characterized in that, including: a memory, a communication bus, and a processor, wherein the memory is configured to store program code, and the processor is configured to call the program code to execute the method according to any one of claims 1-8 below.

34. A network device, characterized in that, including: a memory, a communication bus, and a processor, wherein the memory is configured to store program code, and the processor is configured to call the program code to execute the method according to any one of claims 9-16 below.

35. A computer-readable storage medium, characterized in that, Instructions are stored in the computer-readable storage medium, and when executed on a computer, cause the computer to execute the method according to any one of claims 1-16.

36. A computer program product comprising instructions, characterized in that, When executed on a computer, cause the computer to execute the method according to any one of claims 1-16.

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