Communication method and communication device

Abstract

The invention provides a communication method and a communication device. The method comprises: when the precoding granularity of a first CORESET is a continuous RB, the time-frequency resource of the first CORESET is overlapped with the time-frequency resource of a CRS of LTE, and the time-frequency resource of a first PDCCH candidate in the first CORESET is not overlapped with the time-frequency resource of the CRS, the terminal device can also monitor the first PDCCH candidate. According to the scheme, the PDCCH candidates for bearing the DCI are increased, and the scheduling opportunity of the PDCCH is improved, so that the resource utilization rate is improved.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a communication method and a communication device. Background Art

[0002] With the development and widespread application of communication technology, the time and frequency resources used to transmit information are relatively scarce. For example, the physical downlink control channel (PDCCH) is used to schedule uplink and / or downlink transmission. When the time and frequency resources used to transmit PDCCH are reduced, the flexibility of scheduling will be greatly affected.

[0003] Therefore, how to increase the scheduling opportunities of PDCCH, thereby improving resource utilization, remains to be solved. Summary of the invention

[0004] The embodiments of the present application provide a communication method, a communication device and a communication system to improve resource utilization.

[0005] In a first aspect, an embodiment of the present application provides a communication method, which can be performed by a terminal device or a module (such as a chip) in the terminal device. The method includes: receiving configuration information of a first CORESET, wherein the configuration information indicates that the precoding granularity of the first CORESET is continuous RB; according to the configuration information, monitoring a first PDCCH candidate on the first CORESET; wherein the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS of LTE, and the time-frequency resources of the first PDCCH candidate do not overlap with the time-frequency resources of the CRS.

[0006] The above solution increases the number of PDCCH candidates carrying DCI, increases the scheduling opportunities of PDCCH, and thus improves resource utilization.

[0007] In a possible implementation method, the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS of LTE, including: the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS in all symbols of the time-frequency resources of the first CORESET.

[0008] In a possible implementation method, the method also includes: sending capability information, the capability information indicating support for monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET, and / or indicating support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET.

[0009] In a second aspect, an embodiment of the present application provides a communication method, which can be executed by a terminal device or a module (such as a chip) in the terminal device. The method includes: receiving configuration information of a first CORESET, the configuration information indicating that the precoding granularity of the first CORESET is continuous RB; when the time-frequency resources of the first CORESET and the CRS of LTE overlap, the first PDCCH candidate on the first CORESET does not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET do not overlap with the time-frequency resources of the CRS in at least one symbol of the time-frequency resources of the first CORESET, monitoring the first PDCCH candidate according to the configuration information.

[0010] The above solution increases the number of PDCCH candidates carrying DCI, increases the scheduling opportunities of PDCCH, and thus improves resource utilization.

[0011] In a possible implementation method, the method also includes: when the time-frequency resources of the first CORESET and the CRS overlap, the first PDCCH candidate does not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET and the time-frequency resources of the CRS overlap in all symbols of the time-frequency resources of the first CORESET, the first PDCCH candidate is not monitored.

[0012] In a possible implementation method, the method also includes: when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS, it is not expected that the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET.

[0013] In a possible implementation method, the method also includes: sending capability information, the capability information indicating support for monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET, and / or indicating support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET.

[0014] In a third aspect, an embodiment of the present application provides a communication method, which can be executed by a terminal device or a module (such as a chip) in the terminal device. The method includes: receiving configuration information of a first CORESET, the configuration information indicating that the precoding granularity of the first CORESET is continuous RB, the first CORESET includes N continuous RB sets, N is a positive integer; when the time-frequency resources of the first CORESET and the CRS of LTE overlap, the first PDCCH candidate on the first CORESET does not overlap with the time-frequency resources of the CRS, the frequency domain resources of the first PDCCH candidate are located in M ​​continuous RB sets in the N continuous RB sets, and the first time-frequency resources do not overlap with the time-frequency resources of the CRS in at least one symbol of the first time-frequency resources, according to the configuration information, monitor the first PDCCH candidate; wherein the first time-frequency resource is a time-frequency resource in which the frequency domain resources in the first CORESET are located in the M continuous RB sets, and M is a positive integer less than or equal to N.

[0015] The above solution increases the number of PDCCH candidates carrying DCI, increases the scheduling opportunities of PDCCH, and thus improves resource utilization.

[0016] In a possible implementation method, the method also includes: when the time-frequency resources of the first CORESET and the CRS overlap, the time-frequency resources of the first PDCCH candidate and the CRS do not overlap, and the first time-frequency resources and the time-frequency resources of the CRS overlap in all symbols of the first time-frequency resources, the first PDCCH candidate is not monitored.

[0017] In a possible implementation method, the method further includes: when the time-frequency resources of the first CORESET and the CRS overlap, it is not expected that the first time-frequency resources and the time-frequency resources of the CRS overlap in all symbols of the first time-frequency resources.

[0018] In a possible implementation method, the method also includes: sending capability information, the capability information indicating support for monitoring the first PDCCH candidate when the first time-frequency resources and the time-frequency resources of the CRS do not overlap on at least one symbol of the first time-frequency resources, and / or indicating support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the first time-frequency resources and the time-frequency resources of the CRS do not overlap on at least one symbol of the first time-frequency resources.

[0019] In a fourth aspect, an embodiment of the present application provides a communication method, which can be executed by a network device or a module (such as a chip) in the network device. The method includes: sending configuration information of a first CORESET, wherein the configuration information indicates that the precoding granularity of the first CORESET is continuous RB; sending DCI, wherein the DCI is carried by a first PDCCH candidate on the first CORESET; wherein the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS of LTE, and the time-frequency resources of the first PDCCH candidate do not overlap with the time-frequency resources of the CRS.

[0020] The above solution increases the number of PDCCH candidates carrying DCI, increases the scheduling opportunities of PDCCH, and thus improves resource utilization.

[0021] In a possible implementation method, the method also includes: receiving capability information, the capability information indicating that the terminal device supports monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET, and / or indicating support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET; sending the DCI includes: sending the DCI according to the capability information.

[0022] In the above scheme, the network device can carry and send DCI on the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET. Compared with the scheme in which the network device can only carry and send DCI on the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on part of the symbols of the time-frequency resources of the first CORESET, this scheme increases the PDCCH candidates carrying DCI to a greater extent, improves the scheduling opportunities of PDCCH, and thus improves resource utilization.

[0023] In a possible implementation method, the sending of DCI includes: sending the DCI when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS, the time-frequency resources of the first PDCCH candidate do not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET do not overlap with the time-frequency resources of the CRS in at least one symbol of the time-frequency resources of the first CORESET, and / or when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET do not overlap with the time-frequency resources of the CRS in at least one symbol of the time-frequency resources of the first CORESET.

[0024] In a possible implementation method, the method also includes: receiving capability information, the capability information indicating that the terminal device supports monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET, and / or indicating support for monitoring the second PDCCH candidate on the first CORESET when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET; sending the DCI includes: sending the DCI according to the capability information.

[0025] In the above scheme, there is at least one symbol on the time-frequency resources of the first CORESET that does not overlap with the CRS, that is, the DMRS on at least one symbol is sent normally and is not affected by the CRS. Therefore, the terminal device can use the DMRS on these symbols to perform channel estimation to obtain a better channel estimation result, thereby ensuring the channel estimation performance of the first PDCCH candidate and thus ensuring the reception performance of the DCI carried on the first PDCCH candidate.

[0026] In a possible implementation method, the first CORESET includes N consecutive RB sets, where N is a positive integer; the sending of DCI includes: when the time-frequency resources of the first CORESET overlap with those of the CRS, the time-frequency resources of the first PDCCH candidate do not overlap with those of the CRS, the frequency domain resources of the first PDCCH candidate are located in M ​​consecutive RB sets among the N consecutive RB sets, and the first time-frequency resources do not overlap with the time-frequency resources of the CRS in at least one symbol of the first time-frequency resources, and / or when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS, and the first time-frequency resources do not overlap with the time-frequency resources of the CRS in at least one symbol of the first time-frequency resources, sending the DCI; wherein the first time-frequency resources are time-frequency resources within the first CORESET whose frequency domain resources are located within the M consecutive RB sets, and M is a positive integer less than or equal to N.

[0027] In a possible implementation method, the method also includes: receiving capability information, the capability information indicating support for monitoring the first PDCCH candidate when the first time-frequency resources and the time-frequency resources of the CRS do not overlap on at least one symbol of the first time-frequency resources, and / or indicating support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the first time-frequency resources and the time-frequency resources of the CRS do not overlap on at least one symbol of the first time-frequency resources; sending DCI includes: sending the DCI according to the capability information.

[0028] In the above scheme, because the channel estimation of the first PDCCH candidate only uses the DMRS on the first time-frequency resource, in this scenario, there is at least one symbol on the first time-frequency resource that does not overlap with the CRS, that is, the DMRS on at least one symbol is sent normally and is not affected by the CRS. This ensures that the terminal device uses the DMRS on these symbols for channel estimation, obtains a better channel estimation result, and ensures the channel estimation performance of the first PDCCH candidate, thereby ensuring the reception performance of the DCI carried on the first PDCCH candidate. When the first time-frequency resource is smaller than the first CORESET, this scheme increases the PDCCH candidates that can be used to carry DCI, increases the scheduling opportunities of the PDCCH, and thus improves resource utilization.

[0029] In a fifth aspect, an embodiment of the present application provides a communication device, which may be a terminal device or a module (such as a chip) in a terminal device. The device has the function of implementing any implementation method of the first to third aspects above. The function may be implemented by hardware or by executing corresponding software implementation by hardware. The hardware or software includes one or more modules corresponding to the above functions.

[0030] In a sixth aspect, an embodiment of the present application provides a communication device, which may be a network device or a module (such as a chip) in a network device. The device has the function of implementing any implementation method of the fourth aspect above. The function may be implemented by hardware or by executing corresponding software implementation by hardware. The hardware or software includes one or more modules corresponding to the above functions.

[0031] In a seventh aspect, an embodiment of the present application provides a communication device, comprising a unit or means for executing each step of any implementation method in the first to fourth aspects above.

[0032] In an eighth aspect, an embodiment of the present application provides a communication device, including a processor and an interface circuit, wherein the processor is used to communicate with other devices through the interface circuit and execute any implementation method in the first to fourth aspects above. The processor includes one or more.

[0033] Optionally, the communication device may further include a memory for storing computer instructions, the memory being coupled to a processor, and the processor executing the computer instructions stored in the memory so that the device executes any implementation method in the first to fourth aspects above.

[0034] In the ninth aspect, an embodiment of the present application further provides a computer program product, which includes a computer program or instructions. When the computer program or instructions are executed by a communication device, any implementation method in the above-mentioned first to fourth aspects is executed.

[0035] In the tenth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium, which, when executed on a communication device, enables any implementation method in the above-mentioned first to fourth aspects to be executed.

[0036] In the eleventh aspect, an embodiment of the present application further provides a chip system, comprising: a processor, configured to execute any implementation method in the first to fourth aspects above.

[0037] In the twelfth aspect, an embodiment of the present application also provides a communication system, including a network device for executing any implementation method of the fourth aspect and a terminal device for executing any implementation method of the first to third aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1( a ) is a schematic diagram of the architecture of a communication system used in an embodiment of the present application;

[0039] FIG1( b ) shows a schematic diagram of a network device;

[0040] Figure 2 This is an example diagram of the association between the search space set and the CORESET;

[0041] Figure 3 An example diagram showing the overlap between the time-frequency resources of the PDCCH candidates and the time-frequency resources of the CRS;

[0042] Figure 4 A flow chart of a communication method provided in an embodiment of the present application;

[0043] Figure 5(a) to Figure 5(f) An example diagram showing the overlap between the time-frequency resources of the PDCCH candidates and the time-frequency resources of the CRS;

[0044] Figure 6(a) to Figure 6(e) An example diagram showing the overlap between the time-frequency resources of the PDCCH candidates and the time-frequency resources of the CRS;

[0045] Figure 7(a) to Figure 7(c) An example diagram showing the overlap between the time-frequency resources of the PDCCH candidates and the time-frequency resources of the CRS;

[0046] Figure 8(a) to Figure 8(g) An example diagram showing the overlap between the time-frequency resources of the PDCCH candidates and the time-frequency resources of the CRS;

[0047] Fig. 9 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0048] Fig.10 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] FIG1(a) is a schematic diagram of the architecture of a communication system used in an embodiment of the present application. The communication system 1000 shown in FIG1(a) includes a wireless access network 100 and a core network 200. Optionally, the communication system 1000 also includes the Internet 300. Among them, the wireless access network 100 may include at least one network device (such as 110a and 110b in FIG1(a)), and may also include at least one terminal device (such as 120a-120j in FIG1(a)). The terminal device is connected to the network device by wireless means, and the network device is connected to the core network by wireless or wired means. The core network device and the network device may be independent and different physical devices, or the functions of the core network device and the logical functions of the network device may be integrated on the same physical device, or the functions of some core network devices and some network devices may be integrated on one physical device. Terminal devices and terminal devices and network devices and network devices may be connected to each other by wire or wireless means. FIG. 1( a ) is only a schematic diagram, and the communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 1( a ).

[0050] A network device is an access device that a terminal device accesses to a communication system through a wired or wireless method. A network device may be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation base station (next generation NodeB, gNB) in a fifth generation (5G) mobile communication system, a next generation base station in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; it may also be a module or unit that completes part of the functions of a base station, for example, a centralized unit (CU), a distributed unit (DU), or a radio unit (RU). A network device may be a macro base station (such as 110a in FIG. 1(a)), a micro base station or an indoor station (such as 110b in FIG. 1(a)), or a relay node or a donor node, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0051] The terminal device is a device with wireless transceiver function, which can send signals to network devices or receive signals from network devices. The terminal device includes but is not limited to terminal devices, terminals, user equipment (UE), mobile stations, mobile terminals, etc. The terminal device can be widely used in various scenarios, for example, device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal device can specifically be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.

[0052] The network equipment and terminal equipment can be fixed or movable. The network equipment and terminal equipment 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 artificial satellites. The embodiments of the present application do not limit the application scenarios of the network equipment and terminal equipment.

[0053] The roles of network devices and terminal devices can be relative. For example, the helicopter or drone 120i in FIG. 1(a) can be configured as a mobile network device. For the terminal devices 120j that access the wireless access network 100 through 120i, the terminal device 120i is a network device; but for the network device 110a, 120i is a terminal device, that is, 110a and 120i communicate through the wireless air interface protocol. Of course, 110a and 120i can also communicate through the interface protocol between network devices. In this case, relative to 110a, 120i is also a network device. Therefore, network devices and terminal devices can be collectively referred to as communication devices. 110a and 110b in FIG. 1(a) can be referred to as communication devices with network device functions, and 120a-120j in FIG. 1(a) can be referred to as communication devices with terminal device functions.

[0054] Network devices and terminal devices, network devices and network devices, and terminal devices and terminal devices can communicate through authorized spectrum, unauthorized spectrum, or both; can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0055] In the embodiments of the present application, the functions of the network device may also be performed by a module (such as a chip) in the network device, or by a control subsystem including the network device function. The control subsystem including the network device function here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal device may also be performed by a module (such as a chip or a modem) in the terminal device, or by a device including the terminal device function.

[0056] In this application, the network device sends a downlink signal or downlink information to the terminal device, and the downlink information is carried on the downlink channel; the terminal device sends an uplink signal or uplink information to the network device, and the uplink information is carried on the uplink channel. In order to communicate with the network device, the terminal device needs to establish a wireless connection with the cell controlled by the network device. The cell that has established a wireless connection with the terminal device is called the service cell of the terminal device.

[0057] FIG1(b) shows a schematic diagram of a network device. As shown in FIG1(b), the network device includes one or more CUs, one or more DUs, and one or more RUs. For the sake of clarity, FIG1(b) shows only one CU, DU, and RU. The CU is used to connect to the core network and one or more DUs. Optionally, the CU may have some functions of the core network. The CU may include a CU-control plane (CP) and a CU-user plane (UP).

[0058] CU and DU can be configured according to the protocol layer functions of the wireless network they implement: for example, CU is configured to implement the functions of the packet data convergence protocol (PDCP) layer and the protocol layers above (such as the radio resource control (RRC) layer and / or the service data adaptation protocol (SDAP) layer, etc.); DU is configured to implement the functions of the protocol layers below the PDCP layer (such as the radio link control (RLC) layer, the medium access control (MAC) layer, and / or the physical (PHY) layer, etc.). For another example, CU is configured to implement the functions of the protocol layers above the PDCP layer (such as the RRC layer and / or the SDAP layer), and DU is configured to implement the functions of the PDCP layer and the protocol layers below (such as the RLC layer, the MAC layer, and / or the PHY layer, etc.).

[0059] The above configuration of CU and DU is only an example, and the functions of CU and DU can also be configured as needed. For example, CU or DU can be configured to have functions of more protocol layers, or CU or DU can be configured to have partial processing functions of protocol layers. For example, some functions of the RLC layer and the functions of the protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are set in the DU. For another example, the functions of CU or DU can be divided according to service type or other system requirements, such as by delay, and the functions whose processing time needs to meet the smaller delay requirement are set in the DU, and the functions that do not need to meet the delay requirement are set in the CU.

[0060] DU and RU can cooperate to jointly implement the functions of the PHY layer. A DU can be connected to one or more RUs. The functions of DU and RU can be configured in a variety of ways according to the design. For example, DU is configured to implement baseband functions, and RU is configured to implement mid-RF functions. For another example, DU is configured to implement high-level functions in the PHY layer, and RU is configured to implement low-level functions in the PHY layer or to implement the low-level functions and RF functions. The high-level functions in the physical layer may include a part of the functions of the physical layer, which is closer to the MAC layer, and the low-level functions in the physical layer may include another part of the functions of the physical layer, which is closer to the mid-RF side.

[0061] CU and DU may be separately configured, or may be included in the same network element, such as a baseband unit (BBU). RU may be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH). In different systems, CU, DU or RU may also have different names, but those skilled in the art may understand their meanings. For example, in an ORAN system, CU may also be referred to as O-CU (open CU), DU may also be referred to as O-DU, and RU may also be referred to as O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0062] To facilitate understanding of the content of this application, the nouns or terms involved in the embodiments of this application are first explained below.

[0063] 1. Resources in Long Term Evolution (LTE)

[0064] The time resource units of LTE are subframe, slot and symbol. A subframe includes 12 or 14 orthogonal frequency-division multiplexing (OFDM) symbols. A subframe contains two slots, each of which contains 6 or 7 OFDM symbols. OFDM symbols are referred to as symbols.

[0065] The frequency domain resource unit of LTE is subcarrier. Generally speaking, the subcarrier spacing (SCS) is 15 kilohertz (KHz).

[0066] The time-frequency resource units of LTE are resource blocks (RBs) and resource elements (REs). An RB is a slot in the time domain, i.e., 6 or 7 symbols, and is 12 consecutive subcarriers in the frequency domain. An RE is a symbol in the time domain and a subcarrier in the frequency domain.

[0067] It should be noted that in LTE and new radio (NR) systems, the concepts of slot and RB are different, but the concepts of RE, subcarrier and symbol are basically the same.

[0068] 2. Cell specific reference signal (CRS) in LTE

[0069] LTE downlink sends CRS, which is also called LTE CRS or CRS in LTE. Generally speaking, if an LTE cell is working properly, CRS is always sent. CRS only exists in LTE system, not in NR system. Among them, CRS is used for estimating channels of terminal devices in LTE system, so as to realize important functions such as data demodulation, channel state measurement, initial access, etc.

[0070] CRS can be sent on 1 port, 2 ports or 4 ports.

[0071] III. Resources in NR

[0072] The time resource units of NR are time slots and symbols. A time slot includes 12 or 14 symbols.

[0073] The frequency domain resource units of NR are resource blocks and subcarriers. A resource block contains 12 subcarriers. It should be noted that the resource block (RB) in LTE is a unit of time-frequency resource blocks, while the resource block in NR is a frequency domain resource unit.

[0074] The definition of a resource element (RE) in NR is the same as that in LTE, that is, it occupies one symbol in the time domain and one subcarrier in the frequency domain.

[0075] There are five subcarrier spacings for NR, with serial numbers μ ranging from 0 to 4, corresponding to 15KHz, 30KHz, 60KHz, 120KHz and 240KHz respectively.

[0076] 4. PDCCH Monitoring and PDCCH Candidates in NR

[0077] The NR PDCCH can carry downlink control information (DCI). The network device configures a PDCCH candidate for the terminal device. A PDCCH candidate may or may not send the PDCCH of the terminal device.

[0078] The terminal device monitors the PDCCH candidates and performs PDCCH decoding according to the DCI format to be detected. The monitoring result may be that the PDCCH is detected or that the PDCCH is not detected.

[0079] A PDCCH candidate may contain L = {1, 2, 4, 8, 16} control channel elements (CCE). Here L is called the aggregation level (AL) of the PDCCH. A CCE contains 6 resource element groups (REG). REG is a unit of a time-frequency resource block, which occupies one symbol in the time domain and one resource block in the frequency domain.

[0080] 5. Search space set and control resource set (CORESET) in NR

[0081] A search space set is defined as a set of PDCCH candidates, the ALs of the PDCCH candidates in the set may be the same or different. A search space set is associated with a control resource set.

[0082] CORESET is a concept introduced in NR. A CORESET is defined in a cell and contains a group of continuous or non-continuous resource blocks in the frequency domain and 1, 2 or 3 continuous OFDM symbols in the time domain.

[0083] A search space set is associated with only one CORESET, and a CORESET can be associated with multiple search space sets.

[0084] A search space set can be configured with time domain parameters such as period, offset, etc. Based on the time domain parameters of the search space set and the time-frequency resource parameters of the CORESET associated with it, the size and position of a set of time-frequency resources corresponding to the search space set can be determined.

[0085] Figure 2 This is an example diagram of the association between search space sets and CORESETs. In this example, a CORESET is associated with two search space sets. Based on the time-frequency resource parameters of this CORESET and the time domain parameters of the two search space sets associated with it, the size and location of the time-frequency resources corresponding to the two search space sets can be determined, where search space set 1 corresponds to one group of resources and search space set 2 corresponds to another group of resources.

[0086] The configuration of the search space set includes the AL and the number of PDCCH candidates corresponding to each AL. Based on these configurations and the size and position of the time-frequency resources corresponding to the search space set, the time-frequency resource position of the PDCCH candidate corresponding to this search space set can be determined using the rules specified in the protocol.

[0087] 6. CORESET Precoding and PDCCH Channel Estimation

[0088] For a CORESET, the precoding granularity of the CORESET can be configured through the high-level parameter precoderGranularity. The precoding granularity includes continuous RBs (allContiguousRBs) and sameAsREG-bundle.

[0089] If precoderGranularity is configured as allContiguousRBs (i.e., continuous RBs), the CORESET is divided into a maximum of 4 discontinuous RB sets in the frequency domain, and the RBs in each RB set are continuous. When the terminal device monitors a PDCCH candidate on this CORESET, it can be assumed that all REGs in the continuous RB set in the CORESET where the PDCCH candidate is located have a demodulation reference signal (DMRS) and the same precoding, that is, the PDCCH candidate can use all DMRS in the continuous RB set in the CORESET where it is located for channel estimation.

[0090] If precoderGranularity is configured as sameAsREG-bundle, the terminal device can assume that the precoding within a REG bundle is the same. A REG bundle contains REG bundle size numbered adjacent REGs. If any RE in a PDCCH candidate overlaps with the LTE CRS signal, the terminal device may not monitor this PDCCH candidate.

[0091] The current standard requires that any RE in a CORESET with precoderGranularity configured as allContiguousRBs does not overlap with the LTE CRS indicated by higher-level parameters. That is, when the precoderGranularity of a CORESET is configured as allContiguousRBs, the CORESET does not overlap with the LTE CRS.

[0092] 7. Configuration of LTE CRS in NR

[0093] The CRS of LTE can be configured through the following high-level information elements (IE): lte-CRS-ToMatchAround, lte-CRS-PatternList1 or lte-CRS-PatternList2.

[0094] Among them, lte-CRS-ToMatchAround will configure a set of CRS parameters, including but not limited to:

[0095] 1) Downlink carrier position: carrierFreqDL;

[0096] 2) Downlink carrier bandwidth: carrierBandwidthDL; the carrierBandwidthDL is configured in units of RBs and can be configured as 6, 15, 25, 50, 75, 100 or 200 RBs;

[0097] 3) Multicast broadcast single frequency network (MBSFN) subframe configuration: mbsfn-SubframeConfigList. In the MBSFN subframe, there is no CRS.

[0098] 4) Number of CRS ports: nrofCRS-Ports;

[0099] 5) Frequency shift of CRS: v-Shift.

[0100] Among them, each of the two IEs, lte-CRS-PatternList1 and lte-CRS-PatternList2, can be configured with up to 3 sets of CRS parameters.

[0101] Since the bandwidth of a CORESET can be wider than the bandwidth of a CRS, there may be a scenario where a CORESET and multiple CRSs overlap.

[0102] 8. Overlap of PDCCH candidate time-frequency resources and CRS time-frequency resources

[0103] Since LTE is widely deployed and there are many existing terminal devices (such as mobile phones), LTE and NR systems may coexist for a relatively long time. When there are fewer LTE terminal devices, an LTE carrier can be used by an NR terminal device, that is, LTE terminal devices and NR terminal devices can share a carrier.

[0104] The current protocol stipulates that for a CORESET, when precoderGranularity is configured as allContiguousRBs, the network device will not configure the time-frequency resources of this CORESET to overlap with the time-frequency resources of the CRS, that is, it will not configure a PDCCH candidate that overlaps with the time-frequency resources of the CRS. Correspondingly, the terminal device will not monitor a PDCCH candidate that overlaps with the time-frequency resources of the CRS.

[0105] In NR, some scheduled PDCCHs must be carried on the first three symbols of an NR slot. On the shared carrier of LTE and NR, there will be CRS on the first or first two symbols of NR. Especially when there are CRS on the first two symbols, the PDCCH candidate can only be configured on the third symbol. The resources of one symbol are limited, which leads to insufficient PDCCH resources.

[0106] In order to improve the scheduling flexibility and resource utilization of the PDCCH, it may be considered to transmit the PDCCH on a PDCCH candidate that overlaps with the time-frequency resources of the CRS.

[0107] Figure 3 The figure shows an example of a time-frequency resource of a PDCCH candidate overlapping with a time-frequency resource of a CRS. In this example, the time-frequency resource of a CORESET overlaps with the time-frequency resource of a CRS, and there are PDCCH candidates 1 and 2 on the time-frequency resource of the COREST. In one implementation method, when the precoderGranularity of a COREST is configured as allContiguousRBs, the PDCCH candidate on the time-frequency resource of the COREST that overlaps with the time-frequency resource of the CRS can be considered to carry the PDCCH, for example Figure 3 The time-frequency resources of PDCCH candidate 1 in the message overlap with the time-frequency resources of CRS, so PDCCH candidate 1 can be considered to carry PDCCH.

[0108] In addition, when the precoderGranularity of COREST is configured as allContiguousRBs, if the time-frequency resources of the CORESET overlap with the time-frequency resources of the CRS, can the PDCCH candidates (such as Figure 3 PDCCH candidate 2) to carry PDCCH also needs further study.

[0109] In order to improve the scheduling flexibility and resource utilization of PDCCH, the present application provides corresponding embodiments.

[0110] Figure 4A flow chart of a communication method provided in an embodiment of the present application. The method can be performed by a terminal device or a module in a terminal device, and a network device or a module in a network device. The following takes the terminal device and the network device as an example to perform the method. Among them, the network device here is a network device in an NR system or a future communication system.

[0111] The method comprises the following steps:

[0112] Step 401: The network device sends configuration information of a first CORESET to the terminal device. Correspondingly, the terminal device receives the configuration information.

[0113] The configuration information indicates that the precoding granularity of the first CORESET is continuous RB (allContiguousRBs).

[0114] In one implementation method, before, after or simultaneously with step 401, the network device may also send configuration information of the CRS of LTE to the terminal device, where the configuration information is used to configure the time-frequency resources of the CRS.

[0115] Step 402: The network device sends DCI to the terminal device. Correspondingly, the terminal device receives the DCI.

[0116] The DCI is carried on the first PDCCH candidate on the first CORESET.

[0117] In one implementation method, the LTE network device may send a CRS to the terminal device.

[0118] Step 403: The terminal device monitors the first PDCCH candidate on the first CORESET according to the configuration information.

[0119] The time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS of LTE, and the time-frequency resources of the first PDCCH candidate do not overlap with the time-frequency resources of the CRS.

[0120] by Figure 3 Taking the example of as an example, the first CORESET here can be the CORESET in the figure, and the first PDCCH candidate here can be the PDCCH candidate 2 in the figure. It can be seen that the time-frequency resources of the CORESET overlap with the time-frequency resources of the CRS of LTE, and the time-frequency resources of the PDCCH candidate 2 do not overlap with the time-frequency resources of the CRS.

[0121] It should be noted that even if the network device does not send DCI, the terminal device will monitor the first PDCCH candidate on the first CORESET according to the configuration information.

[0122] In one implementation method, the terminal device can also monitor the CRS using the configuration information of the LTE CRS.

[0123] The above solution increases the number of PDCCH candidates carrying DCI, increases the scheduling opportunities of PDCCH, and thus improves resource utilization.

[0124] The following combines different scenarios. Figure 3 The embodiments are described in detail.

[0125] In scenario 1, it is not required that the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap on some symbols of the time-frequency resources of the first CORESET.

[0126] It can be understood that the time-frequency resources of the first CORESET and the time-frequency resources of the CRS may overlap on some symbols of the time-frequency resources of the first CORESET, or may overlap on all symbols of the time-frequency resources of the first CORESET.

[0127] Figure 5(a) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupy 1 symbol in the time domain. The time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on some symbols of the time-frequency resources of the first CORESET, specifically, they overlap on symbol 0 and do not overlap on symbol 1.

[0128] Figure 5(b) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidates and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 2 symbols in the time domain, the time-frequency resources of CRS1 occupy 1 symbol in the time domain, and the time-frequency resources of CRS2 occupy 1 symbol in the time domain. The time-frequency resources of the first CORESET overlap with the time-frequency resources of CRS1 on some symbols of the time-frequency resources of the first CORESET, specifically, they overlap on symbol 0 and do not overlap on symbol 1. The time-frequency resources of the first CORESET overlap with the time-frequency resources of CRS2 on some symbols of the time-frequency resources of the first CORESET, specifically, they overlap on symbol 0 and do not overlap on symbol 1.

[0129] Figure 5(c) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupy 2 symbols in the time domain. The time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on some symbols of the time-frequency resources of the first CORESET, specifically, they overlap on symbol 0 and do not overlap on symbol 1.

[0130] Figure 5(d) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 3 symbols in the time domain, and the time-frequency resources of the CRS occupy 2 symbols in the time domain. The time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on some symbols of the time-frequency resources of the first CORESET, specifically, they overlap on symbols 0 and 1, and do not overlap on symbol 2.

[0131] Figure 5(e) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidates and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 3 symbols in the time domain, and the time-frequency resources of the CRS occupy 2 symbols in the time domain. The time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on some symbols of the time-frequency resources of the first CORESET, specifically, they overlap on symbol 0, and do not overlap on symbols 1 and 2.

[0132] Figure 5(f) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidates and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 3 symbols in the time domain, and the time-frequency resources of the CRS occupy 1 symbol in the time domain. The time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on some symbols of the time-frequency resources of the first CORESET, specifically, they overlap on symbol 0, and do not overlap on symbols 1 and 2.

[0133] Figure 6 (a) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupy 2 symbols in the time domain. The time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET, specifically, on symbols 0 and 1.

[0134] Figure 6(b) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidates and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 2 symbols in the time domain, the time-frequency resources of CRS1 occupy 1 symbol in the time domain, and the time-frequency resources of CRS2 occupy 2 symbols in the time domain. The time-frequency resources of the first CORESET overlap with the time-frequency resources of CRS1 on some symbols of the time-frequency resources of the first CORESET, specifically, they overlap on symbol 0 and do not overlap on symbol 1. The time-frequency resources of the first CORESET overlap with the time-frequency resources of CRS2 on all symbols of the time-frequency resources of the first CORESET, specifically, they overlap on symbols 0 and 1.

[0135] Figure 6(c) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 1 symbol in the time domain, and the time-frequency resources of the CRS occupy 2 symbols in the time domain. The time-frequency resources of the first CORESET and the time-frequency resources of the CRS overlap on all symbols of the time-frequency resources of the first CORESET, specifically, on symbol 0.

[0136] Figure 6 (d) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 1 symbol in the time domain, and the time-frequency resources of the CRS occupy 2 symbols in the time domain. The time-frequency resources of the first CORESET and the time-frequency resources of the CRS overlap on all symbols of the time-frequency resources of the first CORESET, specifically, on symbol 0.

[0137] Figure 6(e) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are continuous in the frequency domain and occupy 1 symbol in the time domain, and the time-frequency resources of the CRS occupy 1 symbol in the time domain. The time-frequency resources of the first CORESET and the time-frequency resources of the CRS overlap on all symbols of the time-frequency resources of the first CORESET, specifically, on symbol 0.

[0138] Figure 7(a) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are discontinuous in the frequency domain, specifically including continuous RB set 1, continuous RB set 2 and continuous RB set 3, and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupies 2 symbols in the time domain. The first PDCCH candidate is located in the first time-frequency resource, which includes continuous RB set 3 in the frequency domain and symbols 0 and 1 in the time domain. Among them, the first time-frequency resource overlaps with the time-frequency resource of the CRS on all symbols of the first time-frequency resource, specifically, they overlap on symbols 0 and 1.

[0139] Figure 7(b) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are discontinuous in the frequency domain, specifically including continuous RB set 1, continuous RB set 2 and continuous RB set 3, and occupy 1 symbol in the time domain, and the time-frequency resources of the CRS occupy 2 symbols in the time domain. The first PDCCH candidate is located in the first time-frequency resource, which includes continuous RB set 3 in the frequency domain and symbol 0 in the time domain. Among them, the first time-frequency resource overlaps with the time-frequency resource of the CRS on all symbols of the first time-frequency resource, specifically, on symbol 0.

[0140] Figure 7(c) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are discontinuous in the frequency domain, specifically including continuous RB set 1, continuous RB set 2 and continuous RB set 3, and occupy 2 symbols in the time domain, the time-frequency resources of CRS1 occupy 2 symbols in the time domain, and the time-frequency resources of CRS2 occupy 1 symbol in the time domain. The first PDCCH candidate is located in the first time-frequency resource, which includes continuous RB set 2 and continuous RB set 3 in the frequency domain, and includes symbols 0 and 1 in the time domain. The time-frequency resources of CRS1 overlap with the time-frequency resources corresponding to continuous RB set 3, and the time-frequency resources of CRS2 overlap with the time-frequency resources corresponding to continuous RB set 1 and continuous RB set 2. Among them, the first time-frequency resource overlaps with the time-frequency resource of CRS1 on all symbols of the first time-frequency resource, specifically, on symbols 0 and 1; the first time-frequency resource overlaps with the time-frequency resource of CRS2 on some symbols of the first time-frequency resource, specifically, on symbol 0 and no overlap on symbol 1.

[0141] Figure 8(a) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are discontinuous in the frequency domain, specifically including continuous RB set 1, continuous RB set 2 and continuous RB set 3, and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupies 1 symbol in the time domain. The first PDCCH candidate is located in the first time-frequency resource, which includes continuous RB set 3 in the frequency domain and symbols 0 and 1 in the time domain. Among them, the first time-frequency resource and the time-frequency resource of the CRS overlap on some symbols of the first time-frequency resource, specifically, they overlap on symbol 0 and do not overlap on symbol 1.

[0142] Figure 8(b) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are discontinuous in the frequency domain, specifically including continuous RB set 1, continuous RB set 2 and continuous RB set 3, and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupies 1 symbol in the time domain. The first PDCCH candidate is located in the first time-frequency resource, which includes continuous RB set 2 and continuous RB set 3 in the frequency domain, and includes symbols 0 and 1 in the time domain. Among them, the first time-frequency resource overlaps with the time-frequency resource of the CRS on some symbols of the first time-frequency resource, specifically, they overlap on symbol 0 and do not overlap on symbol 1.

[0143] Figure 8(c) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are discontinuous in the frequency domain, specifically including continuous RB set 1, continuous RB set 2 and continuous RB set 3, and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupies 2 symbols in the time domain. The first PDCCH candidate is located in the first time-frequency resource, which includes continuous RB set 3 in the frequency domain and symbols 0 and 1 in the time domain. Among them, the first time-frequency resource and the time-frequency resource of the CRS overlap on some symbols of the first time-frequency resource, specifically, they overlap on symbol 0 and do not overlap on symbol 1.

[0144] Figure 8(d) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are discontinuous in the frequency domain, specifically including continuous RB set 1, continuous RB set 2 and continuous RB set 3, and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupies 2 symbols in the time domain. The first PDCCH candidate is located in the first time-frequency resource, which includes continuous RB set 3 in the frequency domain and symbols 0 and 1 in the time domain. Among them, the first time-frequency resource and the time-frequency resource of the CRS do not overlap in all symbols of the first time-frequency resource, specifically, they do not overlap in symbols 0 and 1.

[0145] Figure 8(e) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are discontinuous in the frequency domain, specifically including continuous RB set 1, continuous RB set 2 and continuous RB set 3, and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupies 1 symbol in the time domain. The first PDCCH candidate is located in the first time-frequency resource, which includes continuous RB set 2 and continuous RB set 3 in the frequency domain, and includes symbols 0 and 1 in the time domain. Among them, the first time-frequency resource and the time-frequency resource of the CRS do not overlap in all symbols of the first time-frequency resource, specifically, they do not overlap in symbols 0 and 1.

[0146] Figure 8(f) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are discontinuous in the frequency domain, specifically including continuous RB set 1, continuous RB set 2 and continuous RB set 3, and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupies 2 symbols in the time domain. The first PDCCH candidate is located in the first time-frequency resource, which includes continuous RB set 2 and continuous RB set 3 in the frequency domain, and includes symbols 0 and 1 in the time domain. Among them, the first time-frequency resource and the time-frequency resource of the CRS do not overlap in all symbols of the first time-frequency resource, specifically, they do not overlap in symbols 0 and 1.

[0147] Figure 8(g) is another example diagram of the overlap between the time-frequency resources of the PDCCH candidate and the time-frequency resources of the CRS provided in an embodiment of the present application. In this example, the time-frequency resources of the first CORESET are discontinuous in the frequency domain, specifically including continuous RB set 1, continuous RB set 2 and continuous RB set 3, and occupy 2 symbols in the time domain, and the time-frequency resources of the CRS occupies 1 symbol in the time domain. The first PDCCH candidate is located in the first time-frequency resource, which includes continuous RB set 2 and continuous RB set 3 in the frequency domain, and includes symbols 0 and 1 in the time domain. Among them, the first time-frequency resource and the time-frequency resource of the CRS do not overlap in some symbols of the first time-frequency resource, specifically, they overlap in symbol 0 and do not overlap in symbol 1.

[0148] For the first scenario, in one implementation method, before the above step 401, the terminal device may send the capability information of the terminal device to the network device, and the capability information indicates that the terminal device supports monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on part or all of the symbols of the time-frequency resources of the first CORESET, and / or indicates support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS and the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on part or all of the symbols of the time-frequency resources of the first CORESET. The second PDCCH candidate is, for example, Figure 3 PDCCH candidate 1 in. Accordingly, the above step 402 may specifically be: the network device may send DCI to the terminal device based on the capability information when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on some or all symbols of the time-frequency resources of the first CORESET, and / or when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS and the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on some or all symbols of the time-frequency resources of the first CORESET. Exemplarily, the capability information may be 1-bit information, such as 0 or 1.

[0149] For the above scenario one, the network device can carry and send DCI on the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on part or all of the symbols of the time-frequency resources of the first CORESET. Compared with the scheme in which the network device can only carry and send DCI on the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on part of the symbols of the time-frequency resources of the first CORESET, this scheme maximizes the PDCCH candidates carrying DCI, improves the scheduling opportunities of PDCCH, and thus improves resource utilization.

[0150] Scenario 2 requires that the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET.

[0151] It can be understood that the above-mentioned step 402 is specifically: when the time-frequency resources of the first CORESET and the CRS of LTE overlap, the first PDCCH candidate on the first CORESET does not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET, and / or when the time-frequency resources of the first CORESET and the CRS of LTE overlap, the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET, the network device sends DCI. Correspondingly, the above-mentioned step 403 is specifically as follows: when the time-frequency resources of the first CORESET and the CRS of LTE overlap, the first PDCCH candidate on the first CORESET does not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET, and / or when the time-frequency resources of the first CORESET and the CRS of LTE overlap, the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET, the terminal device monitors the first PDCCH candidate according to the configuration information of the first CORESET. In the case where the time-frequency resources of the first CORESET and CRS overlap, the first PDCCH candidate does not overlap with the time-frequency resources of CRS, and the time-frequency resources of the first CORESET and the time-frequency resources of CRS overlap on all symbols of the time-frequency resources of the first CORESET, and / or in the case where the time-frequency resources of the first CORESET and the CRS of LTE overlap, the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of CRS, and the time-frequency resources of the first CORESET and the time-frequency resources of CRS overlap on all symbols of the time-frequency resources of the first CORESET, the terminal device does not monitor the first PDCCH candidate. Therefore, in the case where the time-frequency resources of the first CORESET and CRS overlap, the terminal device does not expect the time-frequency resources of the first CORESET and the time-frequency resources of CRS to overlap on all symbols of the time-frequency resources of the first CORESET.

[0152] For the second scenario, Figure 5(a) to Figure 5(f) In the example of , the network device may perform the above step 402, and correspondingly, the terminal device may also perform step 403. Figure 6(a) to Figure 6(e)In the example, the network device may not execute the above step 402, and correspondingly, the terminal device may not execute step 403.

[0153] For scenario two, in one implementation method, before the above step 401, the terminal device may send capability information of the terminal device to the network device, and the capability information indicates that the terminal device supports monitoring of the first PDCCH candidate when the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap on at least one symbol of the time-frequency resources of the first CORESET, and / or indicates support for monitoring of the second PDCCH candidate on the first CORESET when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap on at least one symbol of the time-frequency resources of the first CORESET. Accordingly, the above step 402 may specifically be: the network device may send DCI to the terminal device based on the capability information, when the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap on at least one symbol of the time-frequency resources of the first CORESET, and / or when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS, and when the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap on at least one symbol of the time-frequency resources of the first CORESET. Exemplarily, the capability information may be 1-bit information, such as 0 or 1. For example, the capability information in the above scenario one is 1, and the capability information in the scenario two is 0.

[0154] For the above scenario 2, in this scenario, there is at least one symbol on the time-frequency resources of the first CORESET that does not overlap with the CRS, that is, the DMRS on at least one symbol is sent normally and is not affected by the CRS. Therefore, the terminal device can use the DMRS on these symbols for channel estimation to obtain a better channel estimation result, thereby ensuring the channel estimation performance of the first PDCCH candidate and thus ensuring the reception performance of the DCI carried on the first PDCCH candidate.

[0155] Scenario three requires that the first time-frequency resource and the time-frequency resource of the CRS do not overlap in at least one symbol of the first time-frequency resource.

[0156] The first CORESET includes N consecutive RB sets, N is a positive integer, and the frequency domain resources of the first PDCCH candidate are located in M ​​consecutive RB sets among the N consecutive RB sets, M is a positive integer less than or equal to N. The time-frequency resources in the same consecutive RB set are continuous, and the time-frequency resources in different consecutive RB sets are not continuous. The consecutive RB set is a concept in the frequency domain.

[0157] The first time-frequency resource is a time-frequency resource in which the frequency domain resources in the first CORESET are located in M ​​consecutive RB sets.

[0158] For scenario three, it can be understood that the above step 402 is specifically as follows: when the time-frequency resources of the first CORESET and the CRS of LTE overlap, the first PDCCH candidate on the first CORESET does not overlap with the time-frequency resources of the CRS, and the first time-frequency resources and the time-frequency resources of the CRS do not overlap in at least one symbol of the first time-frequency resources, and / or when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the first time-frequency resources and the time-frequency resources of the CRS do not overlap in at least one symbol of the first time-frequency resources, the network device sends DCI. Correspondingly, the above-mentioned step 403 is specifically as follows: when the time-frequency resources of the first CORESET and the CRS of LTE overlap, the first PDCCH candidate on the first CORESET does not overlap with the time-frequency resources of the CRS, and the first time-frequency resources and the time-frequency resources of the CRS do not overlap in at least one symbol of the first time-frequency resources, and / or when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the first time-frequency resources and the time-frequency resources of the CRS do not overlap in at least one symbol of the first time-frequency resources, the terminal device monitors the first PDCCH candidate according to the configuration information of the first CORESET. In the case where the time-frequency resources of the first CORESET and CRS overlap, the first PDCCH candidate does not overlap with the time-frequency resources of the CRS, and the first time-frequency resources overlap with the time-frequency resources of the CRS on all symbols of the first time-frequency resources, and / or the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS, and the first time-frequency resources do not overlap with the time-frequency resources of the CRS on at least one symbol of the first time-frequency resources, the terminal device does not monitor the first PDCCH candidate. Therefore, in the case where the time-frequency resources of the first CORESET and CRS overlap, the terminal device does not expect the first time-frequency resources to overlap with the time-frequency resources of the CRS on all symbols of the first time-frequency resources.

[0159] For scenario three, Figure 7(a) to Figure 7(c) In the example of , the network device may not perform the above step 402, and accordingly, the terminal device may not perform step 403. Figure 8(a) to Figure 8(g) In the example, the network device may execute step 402, and correspondingly, the terminal device may execute step 403.

[0160] For the third scenario, in one implementation method, before the above step 401, the terminal device may send the capability information of the terminal device to the network device, and the capability information indicates that the terminal device supports monitoring the first PDCCH candidate when the first time-frequency resource and the time-frequency resource of the CRS do not overlap on at least one symbol of the time-frequency resource of the first CORESET, and / or indicates support for monitoring the second PDCCH candidate when the time-frequency resource of the second PDCCH candidate on the first CORESET overlaps with the CRS time-frequency resource, and the first time-frequency resource and the time-frequency resource of the CRS do not overlap on at least one symbol of the first time-frequency resource. Correspondingly, the above step 402 may specifically be: the network device may send DCI to the terminal device based on the capability information when the first time-frequency resource and the time-frequency resource of the CRS do not overlap on at least one symbol of the time-frequency resource of the first CORESET, and / or when the time-frequency resource of the second PDCCH candidate on the first CORESET overlaps with the CRS time-frequency resource, and the first time-frequency resource and the time-frequency resource of the CRS do not overlap on at least one symbol of the first time-frequency resource. Exemplarily, the capability information may be 1-bit information, such as 0 or 1. For example, the capability information in the above scenario 1 is 1, and the capability information in the scenario 3 is 0.

[0161] For the above scenario three, because the channel estimation of the first PDCCH candidate will only use the DMRS on the first time-frequency resource, there is at least one symbol on the first time-frequency resource in this scenario that does not overlap with the CRS, that is, the DMRS on at least one symbol is sent normally and is not affected by the CRS. This ensures that the terminal device uses the DMRS on these symbols for channel estimation and obtains better channel estimation results, thereby ensuring the channel estimation performance of the first PDCCH candidate and thus ensuring the reception performance of the DCI carried on the first PDCCH candidate. When the first time-frequency resource is smaller than the first CORESET, compared to scenario two, this solution increases the number of PDCCH candidates that can be used to carry DCI, increases the scheduling opportunities for PDCCH, and thus improves resource utilization.

[0162] based on Figure 4 Any implementation of the embodiment, in one implementation method, if the terminal device monitors the first PDCCH candidate, the terminal device may also monitor the second PDCCH candidate on the first CORESET, and the time-frequency resources of the second PDCCH candidate overlap with the time-frequency resources of the CRS of LTE. For example, the second PDCCH candidate may be Figure 3 PDCCH candidates in.

[0163] It is understandable that, in order to implement the functions in the above embodiments, the terminal device or network device includes a hardware structure and / or software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0164] Fig. 9 and Fig.10 A schematic diagram of the structure of possible communication devices provided for embodiments of the present application. These communication devices can be used to implement the functions of the terminal device or network device in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments. In the embodiments of the present application, the communication device can be a terminal device or a network device, and can also be a module (such as a chip) applied to a terminal device or a network device.

[0165] Fig. 9 The communication device 900 shown includes a processing unit 910 and a transceiver unit 920. The communication device 900 is used to implement the functions of the terminal device or the network device in the above method embodiment.

[0166] When the communication device 900 is used to implement the function of the terminal device in the above method embodiment, the transceiver unit 920 is used to receive configuration information of the first CORESET, and the configuration information indicates that the precoding granularity of the first CORESET is continuous RB; the processing unit 910 is used to monitor the first PDCCH candidate on the first CORESET according to the configuration information; wherein the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS of LTE, and the time-frequency resources of the first PDCCH candidate do not overlap with the time-frequency resources of the CRS.

[0167] In a possible implementation method, the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS of LTE, including: the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS in all symbols of the time-frequency resources of the first CORESET.

[0168] In a possible implementation method, the transceiver unit 920 is also used to send capability information, wherein the capability information indicates support for monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET, and / or indicates support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET.

[0169] When the communication device 900 is used to implement the function of the terminal device in the above method embodiment, the transceiver unit 920 is used to receive configuration information of the first CORESET, where the configuration information indicates that the precoding granularity of the first CORESET is continuous RB; the processing unit 910 is used to monitor the first PDCCH candidate according to the configuration information when the time-frequency resources of the first CORESET and the CRS of LTE overlap, the first PDCCH candidate on the first CORESET does not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET do not overlap with the time-frequency resources of the CRS in at least one symbol of the time-frequency resources of the first CORESET.

[0170] In a possible implementation method, the processing unit 910 is also used to not monitor the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS, the first PDCCH candidate does not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS in all symbols of the time-frequency resources of the first CORESET.

[0171] In a possible implementation method, the processing unit 910 is also used to, when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS, not expecting the time-frequency resources of the first CORESET to overlap with the time-frequency resources of the CRS in all symbols of the time-frequency resources of the first CORESET.

[0172] In a possible implementation method, the transceiver unit 920 is also used to send capability information, wherein the capability information indicates support for monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET, and / or indicates support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET.

[0173] When the communication device 900 is used to implement the function of the terminal device in the above method embodiment, the transceiver unit 920 is used to receive configuration information of the first CORESET, where the configuration information indicates that the precoding granularity of the first CORESET is continuous RB, and the first CORESET includes N continuous RB sets, where N is a positive integer; the processing unit 910 is used to monitor the first PDCCH candidate according to the configuration information when the time-frequency resources of the first CORESET and the CRS of LTE overlap, the first PDCCH candidate on the first CORESET does not overlap with the time-frequency resources of the CRS, the frequency domain resources of the first PDCCH candidate are located in M ​​continuous RB sets among the N continuous RB sets, and the first time-frequency resources do not overlap with the time-frequency resources of the CRS in at least one symbol of the first time-frequency resources; wherein the first time-frequency resources are time-frequency resources in the first CORESET whose frequency domain resources are located in the M continuous RB sets, and M is a positive integer less than or equal to N.

[0174] In a possible implementation method, the processing unit 910 is also used to not monitor the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS, the first PDCCH candidate does not overlap with the time-frequency resources of the CRS, and the first time-frequency resources overlap with the time-frequency resources of the CRS in all symbols of the first time-frequency resources.

[0175] In a possible implementation method, the processing unit 910 is also used to, when the time-frequency resources of the first CORESET and the CRS overlap, not expecting the first time-frequency resources to overlap with the time-frequency resources of the CRS in all symbols of the first time-frequency resources.

[0176] In a possible implementation method, the transceiver unit 920 is also used to send capability information, wherein the capability information indicates support for monitoring the first PDCCH candidate when the first time-frequency resources and the time-frequency resources of the CRS do not overlap in at least one symbol of the first time-frequency resources, and / or indicates support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the first time-frequency resources and the time-frequency resources of the CRS do not overlap in at least one symbol of the first time-frequency resources.

[0177] When the communication device 900 is used to implement the functions of the network device in the above method embodiment, the transceiver unit 920 is used to send configuration information of the first CORESET, where the configuration information indicates that the precoding granularity of the first CORESET is continuous RB; send DCI, where the DCI is carried by the first PDCCH candidate on the first CORESET; wherein the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS of LTE, and the time-frequency resources of the first PDCCH candidate do not overlap with the time-frequency resources of the CRS.

[0178] In a possible implementation method, the transceiver unit 920 is also used to receive capability information, wherein the capability information indicates that the terminal device supports monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET, and / or indicates support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET; the transceiver unit 920 is used to send DCI, specifically including: being used to send the DCI according to the capability information.

[0179] In a possible implementation method, the transceiver unit 920 is used to send DCI, specifically including: sending the DCI when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS, the first PDCCH candidate does not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET do not overlap with the time-frequency resources of the CRS in at least one symbol of the time-frequency resources of the first CORESET, and / or when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET do not overlap with the time-frequency resources of the CRS in at least one symbol of the time-frequency resources of the first CORESET.

[0180] In a possible implementation method, the transceiver unit 920 is also used to receive capability information, wherein the capability information indicates that the terminal device supports monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET, and / or indicates support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap in at least one symbol of the time-frequency resources of the first CORESET; the transceiver unit 920 is used to send DCI, specifically including: being used to send the DCI according to the capability information.

[0181] In a possible implementation method, the first CORESET includes N consecutive RB sets, where N is a positive integer; the transceiver unit 920 is used to send DCI, specifically including: when the time-frequency resources of the first CORESET overlap with those of the CRS, the time-frequency resources of the first PDCCH candidate do not overlap with those of the CRS, the frequency domain resources of the first PDCCH candidate are located in M ​​consecutive RB sets among the N consecutive RB sets, and the first time-frequency resources do not overlap with the time-frequency resources of the CRS in at least one symbol of the first time-frequency resources, and / or when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the time-frequency resources of the CRS, and the first time-frequency resources do not overlap with the time-frequency resources of the CRS in at least one symbol of the first time-frequency resources, send the DCI; wherein the first time-frequency resources are time-frequency resources in the first CORESET whose frequency domain resources are located in the M consecutive RB sets, and M is a positive integer less than or equal to N.

[0182] In a possible implementation method, the transceiver unit 920 is also used to receive capability information, the capability information indicating support for monitoring the first PDCCH candidate when the first time-frequency resources and the time-frequency resources of the CRS do not overlap on at least one symbol of the first time-frequency resources, and / or indicating support for monitoring the second PDCCH candidate when the time-frequency resources of the second PDCCH candidate on the first CORESET overlap with the CRS time-frequency resources, and the first time-frequency resources and the time-frequency resources of the CRS do not overlap on at least one symbol of the first time-frequency resources; the transceiver unit 920 is used to send DCI, specifically including: being used to send the DCI according to the capability information.

[0183] For a more detailed description of the processing unit 910 and the transceiver unit 920, reference may be made to the relevant description in the above method embodiment, which will not be repeated here.

[0184] Fig.10 The communication device 1000 shown includes a processor 1010 and an interface circuit 1020. The processor 1010 and the interface circuit 1020 are coupled to each other. It is understood that the interface circuit 1020 can be a transceiver or an input-output interface. Optionally, the communication device 1000 may also include a memory 1030 for storing instructions executed by the processor 1010 or storing input data required by the processor 1010 to execute instructions or storing data generated after the processor 1010 executes instructions.

[0185] When the communication device 1000 is used to implement the above method embodiment, the processor 1010 is used to implement the function of the above processing unit 910, and the interface circuit 1020 is used to implement the function of the above transceiver unit 920.

[0186] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0187] The method steps in the embodiments of the present application can be implemented by hardware, or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, register, hard disk, mobile hard disk, compact disc read-only memory (compact disc read-only memory, CD-ROM) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a terminal device or a network device. Of course, the processor and the storage medium can also be present in an access network device or a terminal as discrete components.

[0188] 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 programs or instructions. A computer program refers to a set of instructions for each step of an electronic computer or other device with message processing capability, usually written in a certain programming language, and running on a certain target architecture. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer program or instruction 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 program or instruction may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both volatile and non-volatile types of storage media.

[0189] In the various embodiments of the present application, unless otherwise specified or provided in a logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0190] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formula of this application, the character " / " indicates that the previous and next associated objects are in a "division" relationship.

[0191] It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

Claims

1. A communication method, characterized in that: include: receiving configuration information of a first control resource set CORESET, where the configuration information indicates that a precoding granularity of the first CORESET is a continuous resource block RB; Monitoring a first physical downlink control channel PDCCH candidate on the first CORESET according to the configuration information; The time-frequency resources of the first CORESET overlap with the time-frequency resources of the cell-specific reference signal CRS of the long term evolution LTE, and the time-frequency resources of the first PDCCH candidate do not overlap with the time-frequency resources of the CRS.

2. The method according to claim 1, characterized in that The time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS of LTE, including: The time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS in all symbols of the time-frequency resources of the first CORESET.

3. The method according to claim 1 or 2, characterized in that The method further comprises: Capability information is sent, where the capability information indicates support for monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET.

4. A communication method, characterized in that: include: receiving configuration information of a first control resource set CORESET, where the configuration information indicates that a precoding granularity of the first CORESET is a continuous resource block RB; When the time-frequency resources of the first CORESET overlap with those of the cell-specific reference signal CRS of Long Term Evolution LTE, the first PDCCH candidate on the first CORESET does not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET do not overlap with the time-frequency resources of the CRS in at least one symbol of the time-frequency resources of the first CORESET, the first PDCCH candidate is monitored according to the configuration information.

5. The method according to claim 4, characterized in that The method further comprises: When the time-frequency resources of the first CORESET overlap with those of the CRS, the first PDCCH candidate does not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS in all symbols of the time-frequency resources of the first CORESET, the first PDCCH candidate is not monitored.

6. The method according to claim 4, characterized in that The method further comprises: In the case where the time-frequency resources of the first CORESET and the CRS overlap, it is not expected that the time-frequency resources of the first CORESET and the time-frequency resources of the CRS overlap in all symbols of the time-frequency resources of the first CORESET.

7. The method according to any one of claims 4 to 6, characterized in that The method further comprises: Capability information is sent, where the capability information indicates support for monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET do not overlap with the time-frequency resources of the CRS in at least one symbol of the time-frequency resources of the first CORESET.

8. A communication method, characterized in that: include: receiving configuration information of a first control resource set CORESET, where the configuration information indicates that a precoding granularity of the first CORESET is a continuous resource block RB, and the first CORESET includes N continuous RB sets, where N is a positive integer; In a case where the first CORESET overlaps with a time-frequency resource of a cell-specific reference signal CRS of Long Term Evolution LTE, a first PDCCH candidate on the first CORESET does not overlap with a time-frequency resource of the CRS, a frequency domain resource of the first PDCCH candidate is located in M ​​consecutive RB sets among the N consecutive RB sets, and the first time-frequency resource does not overlap with a time-frequency resource of the CRS in at least one symbol of the first time-frequency resource, monitoring the first PDCCH candidate according to the configuration information; The first time-frequency resource is a time-frequency resource in which the frequency domain resources within the first CORESET are located within the M consecutive RB sets, and M is a positive integer less than or equal to N.

9. The method according to claim 8, characterized in that The method further comprises: When the time-frequency resources of the first CORESET overlap with those of the CRS, the first PDCCH candidate does not overlap with the time-frequency resources of the CRS, and the first time-frequency resources overlap with the time-frequency resources of the CRS in all symbols of the first time-frequency resources, the first PDCCH candidate is not monitored.

10. The method according to claim 8, characterized in that The method further comprises: In the case where the time-frequency resources of the first CORESET and the CRS overlap, it is not expected that the first time-frequency resources and the time-frequency resources of the CRS overlap in all symbols of the first time-frequency resources.

11. The method according to any one of claims 8 to 10, characterized in that The method further comprises: Capability information is sent, where the capability information indicates support for monitoring the first PDCCH candidate when the first time-frequency resource and the time-frequency resource of the CRS do not overlap on at least one symbol of the first time-frequency resource.

12. A communication method, characterized in that: include: Sending configuration information of a first control resource set CORESET, where the configuration information indicates that a precoding granularity of the first CORESET is a continuous resource block RB; Sending downlink control information DCI, where the DCI is carried by a first physical downlink control channel PDCCH candidate on the first CORESET; The time-frequency resources of the first CORESET overlap with the time-frequency resources of the cell-specific reference signal CRS of the long term evolution LTE, and the time-frequency resources of the first PDCCH candidate do not overlap with the time-frequency resources of the CRS.

13. The method according to claim 12, characterized in that The method further comprises: receiving capability information indicating that the terminal device supports monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET overlap with the time-frequency resources of the CRS on all symbols of the time-frequency resources of the first CORESET; The sending of DCI comprises: The DCI is sent according to the capability information.

14. The method according to claim 12, characterized in that The sending of DCI comprises: The DCI is sent when the time-frequency resources of the first CORESET overlap with those of the CRS, the first PDCCH candidate does not overlap with the time-frequency resources of the CRS, and the time-frequency resources of the first CORESET do not overlap with the time-frequency resources of the CRS in at least one symbol of the time-frequency resources of the first CORESET.

15. The method according to claim 14, characterized in that The method further comprises: receiving capability information indicating that the terminal device supports monitoring the first PDCCH candidate when the time-frequency resources of the first CORESET and the time-frequency resources of the CRS do not overlap on at least one symbol of the time-frequency resources of the first CORESET; The sending of DCI comprises: The DCI is sent according to the capability information.

16. The method according to claim 12, characterized in that The first CORESET includes N consecutive RB sets, where N is a positive integer; The sending of DCI comprises: Send the DCI when the time-frequency resources of the first CORESET and the CRS overlap, the time-frequency resources of the first PDCCH candidate and the CRS do not overlap, the frequency domain resources of the first PDCCH candidate are located in M ​​consecutive RB sets among the N consecutive RB sets, and the first time-frequency resources and the time-frequency resources of the CRS do not overlap in at least one symbol of the first time-frequency resources; The first time-frequency resource is a time-frequency resource in which the frequency domain resources within the first CORESET are located within the M consecutive RB sets, and M is a positive integer less than or equal to N.

17. The method according to claim 16, characterized in that The method further comprises: receiving capability information indicating support for monitoring the first PDCCH candidate when the first time-frequency resource and the time-frequency resource of the CRS do not overlap on at least one symbol of the first time-frequency resource; The sending of DCI comprises: The DCI is sent according to the capability information.

18. A communication device, characterized in that: Comprising a module for executing the method described in any one of claims 1 to 3, or the method described in any one of claims 4 to 7, or the method described in any one of claims 8 to 11, or the method described in any one of claims 12 to 17.

19. A communication device, characterized in that: The method comprises a processor and an interface circuit, wherein the processor is used to communicate with other devices through the interface circuit and execute the method described in any one of claims 1 to 3, or the method described in any one of claims 4 to 7, or the method described in any one of claims 8 to 11, or the method described in any one of claims 12 to 17.

20. A computer program product, characterized in that The computer program product comprises instructions which, when executed on a processor, cause the processor to perform the method described in any one of claims 1 to 3, or the method described in any one of claims 4 to 7, or the method described in any one of claims 8 to 11, or the method described in any one of claims 12 to 17.

21. A computer-readable storage medium, characterized in that: The storage medium stores a computer program or instruction. When the computer program or instruction is executed by the communication device, the method described in any one of claims 1 to 3, or the method described in any one of claims 4 to 7, or the method described in any one of claims 8 to 11, or the method described in any one of claims 12 to 17 is implemented.

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