WO2021081852A1

WO2021081852A1 - Resource indication method and related device

Info

Publication number: WO2021081852A1
Application number: PCT/CN2019/114501
Authority: WO
Inventors: 王俊伟; 黎超
Original assignee: 华为技术有限公司
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2021-05-06
Also published as: CN114365563A

Abstract

Embodiments of the present application provide a resource indication method and a related device. The resource indication method comprises: a terminal device receives first indication information and first control information sent by a network device; determine time-domain starting position and frequency-domain starting position of second control information according to the first indication information and the first control information; receive the second control information sent by the network device according to the time-domain starting position and frequency-domain starting position of the second control information. According to the embodiments of the present application, the indication flexibility of control channels and the performance of signal demodulation can be improved.

Description

Resource indicating method and related equipment

Technical field

This application relates to the field of wireless network technology, and in particular to a resource indication method and related equipment.

Background technique

The current standard discusses supporting two-level side link control information (sidelinik control information, SCI) for the transmission of control channel information, referred to 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 analyzing the first-level SCI, it can receive the physical sidelink control channel (PSCCH) that carries the second-level SCI as soon as possible, and analyze the second-level SCI, so as to minimize the delay To receive the physical sidelink shared channel (PSSCH). However, this method is relatively simple and not flexible enough.

Summary of the invention

The present application provides a resource indication method and related equipment, which can improve the flexibility of the resource indication of the control channel and improve the performance of signal demodulation.

In the first aspect, an embodiment of the present application provides a resource indication method, including: a terminal device receives first indication information and first control information sent by a network device; and determining the second control information according to the first indication information and the first control information The time domain start position of the information and the frequency domain start position of the second control information; according to the time domain start position of the second control information and the frequency domain start position of the second control information, the second control sent by the network device is received letter. Through 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 the resource indication of the second control information, but also can correctly receive the second control information, which can be effectively used as the receiving pilot of the data channel, thereby improving the receiving performance of the data channel.

In an optional manner, 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 flexibility of the resource indication of the second control information can be improved.

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

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

In another optional manner, the time domain information includes a reference time domain position, and the reference time domain position includes the last symbol position of the first control information, the first symbol position of the first control information, and the first symbol position of the data channel. At least one of the symbol positions, 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 the reference frequency domain position includes the frequency domain start of the first control information At least one of the position, the frequency domain start position of the control channel, and the frequency domain center position of the data channel.

In another optional manner, the first indication information further includes resource configuration time-domain factors, and the resource configuration time-domain factors include the size of the subcarrier spacing SCS, the configuration of additional DMRS in the demodulation reference signal DMRS mode, and hybrid automatic At least one of the feedback conditions of the retransmitted confirmation information is fed back.

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

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

In another optional manner, the terminal device determines the currently supported resource configuration time domain factor; and searches the first indication information for the offset and reference time corresponding to the resource configuration time domain factor relative to the reference time domain position. Domain position; 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. The time domain starting position of the second control information is determined by the currently supported resource configuration time domain factors, which not only improves the flexibility of the resource indication of the second control information, but also can correctly receive the second control information, which can be effectively used as the data channel. Receive pilot to improve the receiving performance of the data channel.

In another optional manner, the first control information includes the frequency domain start position of the second control information. The frequency domain start position of the second control information is indicated by the first control information, thereby effectively guaranteeing the transmission of the second control information.

In another optional 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. The frequency domain start position of the second control information is determined by blind detection, thereby effectively ensuring the transmission of the second control information.

In a second aspect, embodiments of the present application provide 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 first control information are used by the terminal device to determine the second The time-domain start position of the control information and the frequency-domain start position of the second control information, the time-domain start position of the second control information and the frequency-domain start position of the second control information are used by the terminal device to receive the information sent by the network device The second control information. Through 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 the resource indication of the second control information, but also can correctly receive the second control information, which can be effectively used as the receiving pilot of the data channel, thereby improving the receiving performance of the data channel.

In another possible design, the terminal device maps the second control information to the frequency domain based on 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 frequency domain resources. Resources.

In another possible design, the terminal device obtains the frequency domain resource position occupied by the DMRS; and maps the second control information according to the frequency domain resource position occupied by the DMRS.

In another possible design, the second control information and the scheduled data channel can be resource mapped in a frequency division multiplexing manner, which not only guarantees simple data mapping and demodulation, but also allows more allocations on the control channel The transmit power.

In another possible design, the second control information may 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 control information.

In the third aspect, the embodiments of the present application provide a resource indicating device, which is configured to implement the methods and functions performed by the terminal device in the above-mentioned first aspect, and is implemented by hardware/software. The hardware/software includes and Modules corresponding to the above functions.

In a fourth aspect, an embodiment of the present application provides a resource indicating device, which is configured to implement the methods and functions performed by the network device in the second aspect described above, and is implemented by hardware/software. The hardware/software includes and Modules corresponding to the above functions.

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-executable instructions; the processor is used to execute the computer-executable instructions stored in the memory, so that all The terminal device executes the methods and functions performed by the terminal device in the first aspect described above.

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-executable instructions; the processor is used to execute the computer-executable instructions stored in the memory, so that all The network device executes the methods and functions performed by the network device in the second aspect described above.

In a seventh aspect, the present application provides a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, causes the computer to execute the method in any of the above-mentioned aspects.

In an eighth aspect, the present application provides a computer program product, the computer program product is used to store a computer program, and when the computer program runs on a computer, the computer executes the method of any one of the above aspects.

In a ninth aspect, an embodiment of the present application provides a communication system, including the terminal device in any of the foregoing aspects and the network device in any of the foregoing aspects.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative labor.

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

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

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

Figure 4 is a schematic diagram of an interleaving mapping;

FIG. 5 is a schematic diagram of a two-level SCI sending and receiving provided by an embodiment of the present application;

Figure 6 is a schematic diagram of a multiplexing relationship between PSCCH1 and PSCCH2;

FIG. 7 is a schematic flowchart of a resource indication method provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of PSCCH2 mapping provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application;

FIG. 12 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application;

FIG. 13 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application;

FIG. 14 is a schematic structural diagram of a resource indicating device provided by an embodiment of the present application

FIG. 15 is a schematic structural diagram of another resource indicating device provided by an embodiment of the present application;

FIG. 16 is a schematic structural diagram of a terminal device proposed in an embodiment of the present application;

FIG. 17 is a schematic structural diagram of a network device proposed in an embodiment of the present application.

Detailed ways

The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

As shown in Fig. 1, Fig. 1 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, where the network device may include a core network device 101 and a wireless access network device 102. The terminal device is connected to the wireless access network device in a wireless manner, and the wireless access network device is connected to the core network device in a wireless or wired manner. The core network device and the wireless access network device can be separate and different physical devices, or it can integrate the functions of the core network device and the logical function of the wireless access network device on the same physical device, or it can be a physical device. It integrates the functions of part of the core network equipment and part of the wireless access network equipment. The terminal device can be a fixed location, or it can be movable. Fig. 1 is only a schematic diagram. The communication system may also include other network equipment, such as wireless relay equipment and wireless backhaul equipment, which are not shown in Fig. 1. The embodiment of the present application does not limit the number of core network equipment, radio access network equipment, and terminal equipment included in the mobile communication system.

Radio access network equipment is the access equipment that terminal equipment accesses to the mobile communication system through wireless means. It can be a base station NodeB, an evolved base station (evolved Node B, eNodeB), and the 5th generation mobile networks. , The base station in the 5G) system, the base station in the future mobile communication system, or the access node in the WiFi system, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network equipment.

The terminal device may also be called a terminal (terminal), user equipment (UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), and so on. Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial control) Wireless terminals in ), wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, wireless terminals in smart grid, and wireless terminals in transportation safety (transportation safety) Terminals, wireless terminals in smart cities, wireless terminals in smart homes, and so on.

Wireless access network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airborne aircraft, balloons, and satellites. The embodiments of the present application do not limit the application scenarios of wireless access network equipment and terminal equipment.

The embodiments of the present application can be applied to downlink signal transmission, can also be applied to uplink signal transmission, and can also be applied to device-to-device (D2D) signal transmission. For downlink signal transmission, the sending device is a wireless access network device, and the corresponding receiving device is a terminal device. For uplink signal transmission, the sending device is a terminal device, and the corresponding receiving device is a wireless access network device. For D2D signal transmission, the sending device is a terminal device, and the corresponding receiving device is also a terminal device. The embodiment of the present application does not limit the transmission direction of the signal.

Communication between wireless access network equipment and terminal equipment, as well as between terminal equipment and terminal equipment, can communicate through licensed spectrum, or through unlicensed spectrum, or through licensed spectrum and free spectrum at the same time. Authorize spectrum for communication. Wireless access network equipment and terminal equipment and between terminal equipment and terminal equipment can communicate through the frequency spectrum below 6G, or through the frequency spectrum above 6G, and can also use the frequency spectrum below 6G and the spectrum above 6G at the same time To communicate. The embodiment of the present application does not limit the spectrum resource used between the radio access network device and the terminal device.

The following is an introduction to the relevant background content of the control channel:

The related information of the control channel configured by the network device includes the following parameters:

1. Control channel resource set (control resource set, coreset), indicating the frequency domain and time domain information that may be occupied by the control channel, including frequency domain resources and time domain duration (duration). Each time domain duration can be It includes 1-3 orthogonal frequency division multiplexing (OFDM) symbols. As shown in FIG. 2, FIG. 2 is a schematic diagram of a control channel resource set provided by an embodiment of the present application. A, a time domain duration can include 3 OFDM symbols. B, a time domain duration can include 3 OFDM symbols. C. One time domain duration can include one OFDM symbol. Among them, the gray parts are occupied time domain resources and frequency domain resources.

2. Search space and aggregation level

The search space means that the blind detection of the control channel is performed in the defined space, and the unit of the blind detection is performed according to the aggregation level (AL). The unit of the aggregation level is a control-channel element (CCE). Each CCE has 6 resource element groups (REG), and each REG is composed of 1 resource block (RB). By introducing search space and aggregation level, the flexibility of control channel transmission can be improved, and at the same time, the complexity of detecting the control channel by the terminal can be reduced. As shown in Table 1, if there are 16 CCEs, when the aggregation level is 4, the PDCCH candidate position is 4, that is, blind detection is performed at 4 candidate positions. When the aggregation level is 8, the PDCCH candidate position is 2. When the level is 16, the PDCCH candidate position is 1.

Table 1 Search space parameter table

CCE聚合等级CCE aggregation level	PDCCH候选位置 PDCCH candidate position
44	44
88	22
1616	11

As shown in Figure 3, Figure 3 is a schematic diagram of a search space and aggregation level. In the current control channel transmission process, the control channel can use a fixed quadrature phase shift keying (quadrature phase shift keyin, QPSK) method. When the aggregation level is large (for example, AL=16), the occupied resources are compared More (for example, 16 CCE), only need to blindly check once, the relative bit rate is relatively low, suitable for transmission in low signal-to-noise ratio. When the aggregation level is small (for example, AL=4), it occupies less resources (for example, 4 CCEs), and requires 4 blind checks, and the relative code rate is relatively high, which is suitable for transmission in a high signal-to-noise ratio.

3. CCE-to-REG mapping

The process of CCE to REG mapping is divided into two cases: interleaving mapping and non-interleaving mapping. Interleaving mapping is to perform CCE to REG mapping discontinuously according to a certain rule, and non-interleaving mapping is to continuously perform CCE to REG mapping according to a certain rule. As shown in Figure 4, Figure 4 is a schematic diagram of an interleaving mapping. The formula of the interleaver is as follows:

Among them, j=cR+r, r=0,1,...,R-1, c=0,1,...,C-1,

Are the resources available to all CCEs,

Is the frequency domain width of the coreset (the number of RBs),

Is the number of symbols in coreset. L and R, n _shift are configured by the base station.

Among them, the control channel is the control information for the terminal device to receive the data channel. When based on Uu port transmission (cellular link), the control channel content can be downlink control information (DCI), when based on PC5 port transmission (sidelink), the control channel content is SCI, and the control channel is used to support services Channel PDSCH or PUSCH reception or transmission. Sidelink control channel content can include: type indication, PSSCH frequency domain information, PSSCH frequency domain information, resource reservation indication, target address ID, source address ID, hybrid automatic repeat request, HARQ process ID), new data indication (new data Indication, NDI) data transmission redundancy version (RV), modulation and coding scheme (MCS), service priority indication (priority of QoS), cycle Redundancy check code (cyclic redundancy check, CRC) and so on.

The current standard discusses supporting two-level SCI for the transmission of control channel information, referred to as two-level SCI. The first-level SCI bears the information of channel detection, that is, after receiving the first-level SCI, all terminal equipment knows which link resources will be on Data transmission is performed, so that when the UE selects time domain resources and frequency domain resources for sending data, resource avoidance is performed, thereby reducing interference. As shown in FIG. 5, FIG. 5 is a schematic diagram of a two-level SCI sending and receiving provided by an embodiment of the present application. In the network equipment test, the first level of SCI is sent first, then the second level of SCI, and finally the PSSCH data. On the terminal device side, the first level of SCI is blindly checked. Blind detection means that the terminal device may have to try multiple times to receive until it receives a valid SCI or all attempts may be traversed. If the first-level SCI is detected blindly, the second-level SCI is received according to the first-level SCI. After analyzing the second-level SCI, use the second-level SCI and the first-level SCI to receive the PSSCH.

It can be seen from the above that the terminal device needs to receive the first-level SCI through the blind inspection, and receive the second-level SCI through the instruction information of the first-level SCI, without blind inspection. 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 shown in FIG. 6, FIG. 6 is a schematic diagram of the multiplexing relationship between PSCCH1 and PSCCH2. Among them, PSCCH1 is used to carry the first level of SCI, and PSCCH2 is used to carry the second level of SCI. PSCCH1 and PSCCH2 are adjacent or frequency division multiplexed. It is guaranteed to receive PSCCH2 as soon as possible after analyzing the first level SCI, and analyze the second level SCI, so as to receive the PSSCH channel with the minimum delay. However, this method is relatively simple and not flexible enough. In order to solve the above technical problems, the embodiments of the present application provide the following solutions.

As shown in FIG. 7, FIG. 7 is a schematic flowchart of a resource indication method provided by an embodiment of the present application. The steps in the embodiment of this application at least include:

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

S701: A network device sends first indication information and first control information to a terminal device, and the terminal device receives the first indication information and first control information sent by the network device. Wherein, the first control information may be DCI or SCI. The first indication information may be configuration information. Including but not limited to the following options:

In this embodiment of the present application, the network device may first send the first indication information, and then send the first control information. Alternatively, the first control information may be sent first, and then the first instruction information may be sent. The timing position of the first indication information and the first control information is not limited.

In an implementation manner, the first indication information includes resource configuration time-domain factors, and the resource configuration time-domain factors include the size of subcarrier spacing (SCS), and demodulation reference signals (DMRS). ) At least one of the configuration of the DMRS and the feedback of the acknowledgement information (HARQ-ACK) of the hybrid automatic feedback retransmission (HARQ-ACK) is added in the pattern.

Wherein, the first indication information further includes time domain information and frequency domain information, and the time domain information includes the reference time domain position and other time domain related information. Wherein, the reference time domain position includes 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, and the first symbol position of the demodulation reference signal DMRS. At least one of a symbol position and a boundary position of a time domain resource; the frequency domain information includes a reference frequency domain position and other frequency domain related information, and the reference frequency domain position includes a frequency domain of the first control information At least one of the start position, the frequency domain start position of the control channel, and the frequency domain center position of the data channel.

Wherein, the first indication information further includes the offset relative to the reference time domain position.

Wherein, the resource configuration time domain factor in the first indication information, the reference time domain position, and the offset relative to the reference time domain position correspond to three.

For example, as shown in Table 2, the configuration information includes resource configuration time domain factors (the size of the subcarrier interval), reference time domain position (PSCCH1 occupies the last symbol position), and an offset relative to the reference time domain position. l0 indicates that PSCCH1 occupies the last symbol position, and k0, k1, k2, k3, and k4 indicate the offset of the second SCI relative to the last symbol position occupied by PSCCH1. When the terminal device currently supports SCS=15KHz, it can receive the second SCI according to the configuration information in the first row of Table 2, shifting k0 symbols backward on the last symbol position l0 occupied by PSCCH1 and then receiving the second SCI. Among them, the greater the subcarrier spacing, the greater the value of the offset. For example, when SCS=15KHz, the offset can be 1 or 2. When SCS=30KHz, the offset can take values of 2, 3, 4, 7, or 9, and so on. The values of k0, k1, k2, k3, and k4 are all non-negative integers. Typical values are: k0=2, k1=4, k2=7, k3=7, k4=7, or the value is: k0=1, k1=3, k2=6, k3=6, k4=6.

It should be noted that the size of the sub-carrier spacing SCS, the table only lists the above five cases, when the size of the sub-carrier spacing SCS is other values, the offset can be changed accordingly, such as when the sub-carrier spacing SCS When the value is 7.5KHz, 3.75KHz, 480KHz, the offset can be changed accordingly. In addition, l0 may also indicate the start position of the data channel (for example, the PSSCH data channel) in the time domain, the position of the time domain resources occupied by the DMRS, or the boundary position of the time domain resources. Take the boundary position of the time domain resource as an example, if SCS=30KHz, start from the start position of the time domain resource (the 0th symbol), shift backward by k1 symbols, and set the k1+1th symbol position as the first 2. The time domain start position of SCI.

Table 2

资源配置时域因素Resource allocation time domain factors	符号位置Symbol position	备注说明instruction manual
SCS＝15KHzSCS=15KHz	l0+k0l0+k0	l0是PSCCH1占用最后一个符号位置l0 is the last symbol position occupied by PSCCH1
SCS＝30KHzSCS=30KHz	l0+k1l0+k1	l0是PSCCH1占用最后一个符号位置l0 is the last symbol position occupied by PSCCH1
SCS＝60KHzSCS=60KHz	l0+k2l0+k2	l0是PSCCH1占用最后一个符号位置l0 is the last symbol position occupied by PSCCH1
SCS＝120KHzSCS=120KHz	l0+k3l0+k3	l0是PSCCH1占用最后一个符号位置l0 is the last symbol position occupied by PSCCH1
SCS＝240KHzSCS=240KHz	l0+k4l0+k4	l0是PSCCH1占用最后一个符号位置l0 is the last symbol position occupied by PSCCH1

For example, as shown in Table 3, the configuration information includes resource configuration time domain factors (the configuration of additional DMRS in the demodulation reference signal DMRS mode or the feedback of the confirmation information of the hybrid automatic feedback retransmission), the reference time domain location (PSCCH1 occupancy The last symbol position) and the offset relative to the reference time domain position. l0 indicates that PSCCH1 occupies the last symbol position, and k0, k1, k2, k3, and k4 indicate the offset of the second SCI relative to the last symbol position occupied by PSCCH1. For example, when the terminal device supports the DMRS pattern and contains additional DMRS, it can receive the second SCI according to the configuration information in the second row of Table 3, shift the position of the last symbol occupied by PSCCH1 by k1 symbols and then receive the second SCI. For another example, when the terminal device supports HARQ-ACK feedback, it receives the second SCI according to the configuration information in the fourth row, shifts the position of the last symbol occupied by PSCCH1 by k3 symbols and then receives the second SCI. In addition, l0 may also indicate the start position of the data channel (for example, the PSSCH data channel) in the time domain, the position of the time domain resources occupied by the DMRS, or the boundary position of the time domain resources.

table 3

If the configuration information includes the size of the SCS, the configuration of the additional DMRS in the demodulation reference signal DMRS mode, or the feedback of the confirmation information of the hybrid automatic feedback retransmission, the terminal device can select the maximum value of the symbol positions corresponding to the above three configuration information . For example, the terminal device supports SCS=15KHz, and the DMRS pattern contains additional DMRS and HARQ-ACK feedback. If SCS=15KHz, the time domain start position of the second SCI corresponding to the 6th character, the DMRS pattern contains additional DMRS The time domain start position of the second SCI is the 4th character, and the time domain start 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 of the second SCI starting point.

In another implementation manner, the first indication information includes a resource configuration time domain factor and the reference time domain location. Wherein, the resource configuration time domain factor corresponds to the reference time domain position. The first control information includes the offset relative to the reference time domain position. Wherein, the resource configuration time domain factor, the reference time domain position, and the offset relative to the reference time domain position can refer to the above description.

In another implementation manner, the first indication information includes a resource configuration time domain factor and the offset relative to the reference time domain position, wherein the resource configuration time domain factor is relative to the reference time domain position. Corresponds to the offset of the domain position. The first control information includes the reference time domain position. Wherein, the resource configuration time domain factor, the reference time domain position, and the offset relative to the reference time domain position can refer to the above description.

Optionally, the network device may send the first indication information to the terminal device through high-level signaling, and the high-level signaling may include system broadcast messages, radio resource control (radio resource control, RRC) messages, and so on. The configuration information can also be clearly specified through an agreement.

S702: The terminal device determines a time domain start position of the 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.

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. It can include the following options:

In an implementation manner, the terminal device may first determine the currently supported resource configuration time domain factor. For example, the size of the currently supported SCS can be obtained by blindly checking the first SCS, or whether the terminal device supports HARQ-ACK feedback can be obtained from the system configuration. Then, the offset relative to the reference time domain position and the reference time domain position corresponding to the resource configuration time domain factor are searched from the first indication information. For example, if it is determined by blind detection of the first SCS that the size of the CSC currently supported by the terminal device is 120KHz, from the configuration information in row 4 in Table 2 above, it is determined that the offset between the second SCI and PSCCH1 occupying the last symbol position is k3. For another example, it is obtained from the system configuration that the terminal device supports HARQ-ACK feedback, and the offset of the last symbol position occupied by the second SCI and PSCCH1 can be determined from the configuration information in the fourth row of Table 3 as 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.

In another implementation manner, the terminal device may first determine the currently supported resource configuration time domain factor, and then search for the reference time domain location corresponding to the resource configuration time domain factor from the first indication information, and then according to The offset relative to the reference time domain position contained in the first control information and the found reference time domain position determine the time domain start position of the second control information. Similar to the above, we will not illustrate them one by one here.

In another implementation manner, the terminal device may first determine the currently supported resource configuration time domain factor, and then search for the resource configuration time domain factor corresponding to the resource configuration time domain factor relative to the reference time domain from the first indication information Position offset, 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.

For example, the PSCCH1 occupying the last symbol position 10 is indicated by the first SCI, and after receiving the first SCI, the terminal device parses out that PSCCH1 occupies the last symbol position 10. Or PSCCH1 occupies the last symbol position l0 by the system default setting, for example, the system defaults to start from the 0th symbol, or the 1st symbol, or the 2nd symbol, or the 3rd symbol. 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 between the second SCI and the last symbol position occupied by PSCCH1, that is, the last symbol position occupied by PSCCH1 The symbol position l0 is shifted backward by the offset k3 relative to the reference time domain position, and the 10+k3+1th symbol position is used as the time domain start position of the PSCCH2 of the second SCI.

Optionally, the network device may map the second control information 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 frequency domain resources Frequency domain resources. The frequency domain resource unit may be CCE, subchannel number, resource block (resource block, RB), or resource element (resource element, RE).

Assuming that the number of frequency domain resources occupied by PSCCH2 is R, the first-level SCI indicates that the frequency domain starting position of PSSCH2 is k, and there are N frequency domain resources in total. The following examples illustrate many situations.

For example, as shown in FIG. 8, FIG. 8 is a schematic diagram of PSCCH2 mapping provided by an embodiment of the present application. In the case that 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 starting position k of the second SCI, and the second SCI is determined by the above steps. The time domain start position of the SCI is l. Therefore, the frequency domain start position k and the time domain start position l are mapped from bottom to top, and the value of k continues to increase until all PSCCH2 are mapped to the lth symbol.

In the case where the number of frequency domain resources R of PSCCH2 is greater than N, that is, all PSCCH2s need to be mapped to at least two symbols (the 1st symbol and the 1+1th symbol). When there is a DMRS on the 1+1th symbol, the terminal device may map the second SCI according to the frequency domain resource position occupied by the DMRS. Including the following mapping methods.

In an implementation manner, on the 1+1th symbol, no PSCCH2 resource mapping is performed on the RE position of the DMRS. For example, as shown in FIG. 9, FIG. 9 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application. PSCCH2 has a total of R=N+2 REs, and N PSCCH2 can be mapped on the l-th OFDM symbol. On the k+1th RE of the l+1th OFDM symbol, there is a DMRS pilot mapping. Therefore, PSCCH2 mapping is not performed on the k+1th RE on the l+1th OFDM symbol, and PSCCH2 is mapped To the kth and k+2th REs of the l+1th OFDM symbol.

In another implementation manner, on the l+1th symbol, at the RE position with DMRS, when the DMRS symbol is not a preamble DMRS (the DMRS in the first column of the PSSCH), the DMRS mapping may not be performed, using PSCCH2 is substituted. For example, as shown in FIG. 10, FIG. 10 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application. PSCCH2 has a total of R=N+2 REs, and N PSCCH2 can be mapped on the l-th OFDM symbol. On the k+1th RE of the l+1th OFDM symbol, there is a DMRS pilot mapping, and PSCCH2 can be mapped on the kth and k+1th REs of the l+1th OFDM symbol. No DMRS mapping is performed on the k+1th RE of the l+1th OFDM symbol.

In another implementation manner, if there is DMRS pilot mapping on the 1+1 symbol, the PSCCH2 resource mapping is performed on the 1+2 symbol. For example, as shown in FIG. 11, FIG. 11 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application. PSCCH2 has a total of R=N+2 REs, and N PSCCH2 can be mapped on the l-th OFDM symbol. On the k+1th RE of the l+1th OFDM symbol, there is a DMRS pilot mapping. Therefore, the remaining 2 PSCCH2 can be mapped to the 1+2th OFDM symbol.

Optionally, the second control information and the scheduled data channel may 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 guarantees simple data mapping and demodulation, but also allocates more transmit power on the control channel. Among them, the frequency domain resource width occupied by PSCCH2 is R/l, and 1 is the number of time domain resources that can be occupied by PSCCH2. For example, as shown in FIG. 12, FIG. 12 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application. The PSCCH2 may be mapped to the N-1th and N-2th frequency domain resources, and the PSSCH may be mapped to the kth to N-3th frequency domain resources.

Optionally, the second control information may 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 PSCCH. For example, as shown in FIG. 13, FIG. 13 is a schematic diagram of another PSCCH2 mapping provided by an embodiment of the present application. The PSCCH2 can be mapped to the k+2 to k+4 frequency domain resources, and the PSSCH can be mapped to other frequency domain resources, and the frequency domain resources occupied by the PSCCH2 are located in the middle of the frequency domain resources occupied by the PSSCH. For example, if PSCCH2 occupies X frequency domain resources, PSSCH occupies N frequency domain resources, and the frequency domain starting position is k, then the starting frequency domain resource of PSCCH2 is k_pscch2=k+floor(X/2)-floor(N/ 2), where floor means downward forensics.

Optionally, whether PSCCH2 adopts VRB-to-PRB mapping and interleaving includes the following three methods:

1. The agreement does not support VRB to PRB interleaving mapping.

2. Support VRB to PRB interleaving mapping, but whether to perform VRB to PRB interleaving mapping is configured by the higher layer. If PSCCH2_interleave is configured as TRUE, interleaving is supported, otherwise, interleaving is not supported. The relevant interleaving configuration can be associated with the resource pool, that is, the resource pool is used as a unit to determine whether to support VRB to PRB interleaving.

3. Whether the interleaving is consistent with the PSSCH, that is, if the PSSCH uses the VRB to PRB mapping process, PSCCH2 also uses the VRB to PRB mapping process. If PSSCH does not use VRB to PRB mapping, PSCCH2 does not use the VRB to PRB mapping process. Whether the PSSCH adopts the VRB to PRB mapping process can be indicated by the SCI or configured by high-level signaling. For example, the VRB to PRB mapping indication is indicated in the SCI, which acts on PSSCH and PSCCH2 at the same time.

Optionally, whether PSCCH2CCE adopts CCE-to-REG interleaving mapping includes the following three methods:

1. The agreement does not support CCE-to-REG interleaving mapping.

2. CCE-to-REG interleaving mapping is supported, but whether to perform CCE-to-REG interleaving mapping can be configured by high-level signaling.

3. It is consistent with the way of PSCCH1, that is, if PSCCH1 adopts the CCE-to-REG interleaving mapping process, PSCCH2 also adopts the CCE-to-REG interleaving mapping process. If PSCCH1 does not use the CCE-to-REG interleaving mapping process, then PSCCH2 does not use the CCE-to-REG interleaving mapping process.

Optionally, after the network device maps the second control information to the frequency domain resource, the network device sends the second control information to the terminal device. The terminal device may determine the frequency domain start position of the second control information in the following manner: the first control information includes the frequency domain start position of the second control information, and after receiving the first control information, the terminal device may According to the frequency domain starting position of the second control information contained in the first control information. Alternatively, the terminal device obtains the frequency domain start position of the first control information through blind detection; and then uses the frequency domain start position of the first control information as the frequency domain start position of the second control information .

S703: The terminal device 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. Finally, according to the received first control information and second control information, the data channel sent by the network device is received.

In the embodiment of the present application, the terminal device determines the second control information according to 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 confirmation information of the hybrid automatic feedback retransmission. The start position of the time domain. Not only the flexibility of the resource indication of the second control information is improved, but the second control information that can be correctly received can be effectively used as the receiving pilot of the data channel, thereby improving the receiving performance of the data channel. In addition, the frequency domain information of the second control information is indicated, so that the terminal device can correctly receive the second control information.

The foregoing describes the method of the embodiment of the present application in detail, and the device of the embodiment of the present application is provided below.

As shown in FIG. 14, FIG. 14 is a schematic structural diagram of a resource indicating device provided by an embodiment of the present application. The device may include a receiving module 1401 and a processing module 1402, wherein the detailed description of each module is as follows.

The receiving module 1401 is configured to receive first instruction information and first control information sent by a network device;

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

The receiving module 1401 is further configured to receive 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.

Optionally, 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.

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

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

Wherein, the time domain information includes the reference time domain position, and the reference time domain position includes the last symbol position of the first control information, the first symbol position of the first control information, and the position of the data channel. At least one of the first symbol position, 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. One item.

Wherein, the first indication information further includes resource configuration time-domain factors, and the resource configuration time-domain factors include the size of the subcarrier spacing SCS, the configuration of additional DMRS in the demodulation reference signal DMRS mode, and hybrid automatic feedback retransmission. Confirm at least one of the feedback status of the information.

Optionally, the processing module 1402 is further configured to determine the currently supported resource configuration time domain factor; find the relative time domain factor corresponding to the resource configuration time domain factor from the first indication information Domain position offset and the reference time domain position; 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 .

The first control information includes the frequency domain start position of the second control information.

Optionally, the processing module 1402 is further configured to obtain the frequency domain start position of the first control information through blind detection; use the frequency domain start position of the first control information as the frequency domain of the second control information. The starting position of the domain.

It should be noted that the implementation of each module can also refer to the corresponding description of the method embodiment shown in FIG. 7 to execute the methods and functions performed by the terminal device in the foregoing embodiment.

As shown in FIG. 15, FIG. 15 is a schematic structural diagram of another resource indicating device provided by an embodiment of the present application. The device may include a sending module 1501 and a processing module 1502, wherein the detailed description of each module is as follows.

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

Wherein, 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.

Wherein, the first control information includes the frequency domain starting position of the second control information.

Optionally, the processing module 1502 is configured to control the second control information 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 frequency domain resources. The information is mapped to frequency domain resources.

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.

It should be noted that the implementation of each module can also refer to the corresponding description of the method embodiment shown in FIG. 7 to execute the method and function performed by the network device in the above embodiment.

Please continue to refer to FIG. 16, which is a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in FIG. 16, 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.

The processor 1601 may 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 conjunction with the disclosure of this application. The processor may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. The communication bus 1604 may be a standard PCI bus for interconnecting peripheral components or an extended industry standard structure EISA bus. The bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 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 connection and communication between these components. Among them, the communication interface 1602 of the device in the embodiment of the present application is used for signaling or data communication with other node devices. The memory 1603 may include volatile memory, such as nonvolatile random access memory (NVRAM), phase change RAM (PRAM), magnetoresistive random access memory (magetoresistive) RAM, MRAM), etc., may also include non-volatile memory, such as at least one disk storage device, electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), flash memory devices, such as reverse or flash memory (NOR flash memory) or NAND flash memory (NAND flash memory), semiconductor devices, such as solid state disk (SSD), etc. Optionally, the memory 1603 may also be at least one storage device located far away from the foregoing processor 1601. Optionally, the memory 1603 may also store a set of program codes, and the processor 1601 may optionally also execute programs executed in the memory 1603.

Receiving the first instruction information and the first control information sent by the network device;

Determining the time domain start position of the second control information and the frequency domain start position of the second control information according to the first indication information and the first control information;

Receiving 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.

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

Prepare to determine the currently supported resource configuration time domain factors;

Searching for the offset relative to the reference time domain position and the reference time domain position corresponding to the resource configuration time domain factor from the first indication information;

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.

Acquiring the frequency domain start position of the first control information through blind detection;

The frequency domain starting position of the first control information is used as the frequency domain starting position of the second control information.

Further, the processor may also cooperate with the memory and the communication interface to perform the operation of the terminal device in the above-mentioned application embodiment.

Please continue to refer to FIG. 17, which is a schematic structural diagram of a network device according to 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.

The processor 1701 may be various types of processors mentioned above. The communication bus 1704 may be a standard PCI bus for interconnecting peripheral components or an extended industry standard structure EISA bus. The bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 17, but it does not mean that there is only one bus or one type of bus. The communication bus 1704 is used to implement connection and communication between these components. Among them, the communication interface 1702 of the device in the embodiment of the present application is used for signaling or data communication with other node devices. The memory 1703 may be the various types of memories mentioned above. Optionally, the memory 1703 may also be at least one storage device located far away from the foregoing processor 1701. The memory 1703 stores a set of program codes, and the processor 1701 executes the programs in the memory 1703.

Send first instruction information and first control information to a terminal device, where the first instruction information and the first control information are used by the terminal device to determine the time domain start position of the second control information and the second control information The frequency domain start position of the information, the time domain start position of the second control information and the frequency domain start position of the second control information are used by the terminal device to receive the second signal sent by the network device. Control information.

The second control information is mapped 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 frequency domain resources.

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

Obtain the frequency domain resource location occupied by the DMRS;

The second control information is mapped according to the frequency domain resource position occupied by the DMRS.

Further, the processor may also cooperate with the memory and the communication interface to perform the operation of the network device in the above-mentioned application embodiment.

The embodiments of the present application also provide a chip system, which includes a processor, which is used to support terminal devices or network devices to implement the functions involved in any of the above embodiments, such as generating or processing the functions involved in the above methods. Data and/or information. In a possible design, the chip system may further include a memory, and the memory is used for necessary program instructions and data for terminal devices or network devices. The chip system can be composed of chips, or include chips and other discrete devices.

The embodiments of the present application also provide a processor, which is configured to be coupled with a memory and configured to execute any method and function involving a terminal device or a network device in any of the foregoing embodiments.

The embodiments of the present application also provide a computer program product, which when running on a computer, enables the computer to execute any method and function involving a terminal device or a network device in any of the foregoing embodiments.

The embodiment of the present application also provides a communication device, which is used to execute any method and function related to a terminal device or a network device in any of the foregoing embodiments.

An embodiment of the present application also provides a communication system, which includes at least one terminal device and at least one network device involved in any of the foregoing embodiments.

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

The specific implementations described above further describe the purpose, technical solutions, and beneficial effects of the present application in further detail. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A resource indication method, characterized in that the method includes:

The terminal device receives the first instruction information and the first control information sent by the network device;

Determining, by the terminal device, a time domain start position of the 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;

The terminal device 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.
The method according to claim 1, wherein 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.
The method according to claim 2, wherein the first indication information includes the offset relative to the reference time domain position.
The method according to claim 3, wherein the first indication information includes time domain information and frequency domain information.
The method according to claim 4, wherein the time domain information includes the reference time domain position, and the reference time domain position includes the last symbol position of the first control information, the first control information At least one of the first symbol position of the 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. One item.
The method according to claim 4 or 5, wherein the first indication information further includes a resource configuration time domain factor, and the resource configuration time domain factor includes the size of the subcarrier spacing SCS, and the demodulation reference signal DMRS mode At least one of the configuration status of the additional DMRS and the feedback status of the confirmation information of the hybrid automatic feedback retransmission.
The method according to claim 6, wherein the terminal device determines the time domain start position of the second control information and the second control information according to the first indication information and the first control information The starting positions of the frequency domain include:

Determining, by the terminal device, the currently supported resource configuration time domain factor;

Searching, by the terminal device, the offset relative to the reference time domain position and the reference time domain position corresponding to the resource configuration time domain factor from the first indication information;

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.
The method according to any one of claims 1-7, wherein the first control information includes a frequency domain starting position of the second control information.
The method according to any one of claims 1-7, wherein the method further comprises:

Acquiring, by the terminal device, the frequency domain starting 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.
A resource indication method, characterized in that the method includes:

The network device sends first instruction information and first control information to the terminal device, where the first instruction information and the first control information are used by the terminal device to determine the time domain start position of the second control information and the first control information. 2. The frequency domain start position of the control information, the time domain start position of the second control information and the frequency domain start position of the second control information are used by the terminal device to receive the transmission from the network device The second control information.
The method according to claim 10, wherein 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.
The method according to claim 11, wherein the first indication information includes the offset relative to the reference time domain position.
The method according to claim 12, wherein the first indication information includes time domain information and frequency domain information.
The method according to claim 13, wherein the time domain information includes the reference time domain position, the reference time domain position includes the last symbol position of the first control information, the first control information At least one of the first symbol position of the 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. One item.
The method according to claim 13 or 14, wherein the first indication information further includes resource configuration time-domain factors, and the resource configuration time-domain factors include the size of the subcarrier spacing SCS, and the demodulation reference signal DMRS mode At least one of the configuration of the additional DMRS and the feedback of the confirmation information for the hybrid automatic feedback retransmission.
The method according to any one of claims 10-15, wherein the first control information includes a frequency domain starting position of the second control information.
The method according to any one of claims 10-16, wherein the method further comprises:

The terminal device maps 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 frequency domain resources on.
The method according to claim 17, wherein the terminal device is based on 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 frequency domain resources. , Mapping the second control information to frequency domain resources includes:

Acquiring, by the terminal device, the position of the frequency domain resource occupied by the DMRS;

The terminal device maps the second control information according to the location of the frequency domain resources occupied by the DMRS.
A resource indicating device, characterized in that the device includes:

A receiving module, configured to receive the first instruction information and the first control information sent by the network device;

A processing module, configured to determine a time domain starting position of the second control information and a 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 start position of the second control information and the frequency domain start position of the second control information.
The apparatus according to claim 19, wherein 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.
The apparatus according to claim 20, wherein the first indication information includes the offset relative to the reference time domain position.
The apparatus according to claim 21, wherein the first indication information includes time domain information and frequency domain information.
The apparatus of claim 22, wherein the time domain information includes the reference time domain position, and the reference time domain position includes the last symbol position of the first control information, the first control information At least one of the first symbol position of the 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. One item.
The apparatus according to claim 22 or 23, wherein the first indication information further includes a resource configuration time domain factor, and the resource configuration time domain factor includes the size of the subcarrier spacing SCS, and the demodulation reference signal DMRS mode At least one of the configuration status of the additional DMRS and the feedback status of the confirmation information of the hybrid automatic feedback retransmission.
The device of claim 24, wherein:

The processing module is further configured to determine the currently supported resource configuration time domain factor; search for the resource configuration time domain factor corresponding to the resource configuration time domain position relative to the reference time domain position from the first indication information An offset and the reference time domain position; 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.
The device according to any one of claims 19-25, wherein the first control information comprises a frequency domain starting position of the second control information.
The device according to any one of claims 19-26, wherein:

The processing module is further configured to obtain the frequency domain start position of the first control information through blind detection; use the frequency domain start position of the first control information as the frequency domain start position of the second control information position.
A resource indicating device, characterized in that the device includes:

The sending module is configured to send first indication information and first control information to a terminal device, where the first indication information and the first control information are used by the terminal device to determine the time domain start position and the time domain of the second control information. The frequency domain start position of the second control information, the time domain start position of the second control information, and the frequency domain start position of the second control information are used by the terminal device to receive a transmission from the network device The second control information.
The apparatus according to claim 28, wherein 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.
The apparatus of claim 29, wherein the first indication information includes the offset relative to the reference time domain position.
The apparatus of claim 30, wherein the first indication information includes time domain information and frequency domain information.
The apparatus according to claim 31, wherein the time domain information comprises the reference time domain position, and the reference time domain position comprises the last symbol position of the first control information, the first control information At least one of the first symbol position of the 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. One item.
The apparatus according to claim 31 or 32, wherein the first indication information further includes a resource configuration time domain factor, and the resource configuration time domain factor includes the size of the subcarrier spacing SCS, and the demodulation reference signal DMRS mode At least one of the configuration status of the additional DMRS and the feedback status of the confirmation information of the hybrid automatic feedback retransmission.
The apparatus according to any one of claims 28-33, wherein the first control information includes a frequency domain starting position of the second control information.
The device according to any one of claims 28-34, wherein the device further comprises:

The processing module is configured to map the second control information to the frequency domain 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 frequency domain resources Resources.
The device of claim 35, wherein:

The processing module 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.
A terminal device, characterized by comprising: a memory, a communication bus, and a processor, wherein the memory is used to store program code, and the processor is used to call the program code to execute any of the following as claimed in claims 1-9. The method described in one item.
A network device, characterized by comprising: a memory, a communication bus, and a processor, wherein the memory is used to store program code, and the processor is used to call the program code to execute any of the following as claimed in claims 10-18 The method described in one item.
A computer-readable storage medium, characterized in that instructions are stored in the computer-readable storage medium, which when run on a computer, cause the computer to execute the method according to any one of claims 1-18.
A computer program product containing instructions, which is characterized in that when it runs on a computer, it causes the computer to execute the method according to any one of claims 1-18.