Communication method and communication device

Abstract

The embodiment of the invention provides a communication method and a communication device, which are used for improving the coverage capability of a PDCCH (Physical Downlink Control Channel). The method comprises the following steps: receiving first information, wherein the first information indicates configuration information of a physical downlink control channel (PDCCH); when the condition is met, the PDCCH is monitored on a first PDCCH transmission resource according to the first information, the first PDCCH transmission resource comprises a second PDCCH transmission resource used for enhancing the PDCCH, and the enhanced PDCCH comprises repeated transmission of the PDCCH and / or improvement of the aggregation level of the PDCCH.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a communication method and a communication device. Background Art

[0002] Non-terrestrial network (NTN) communication, especially satellite communication, has been included in the discussions of 3GPP-related standards due to its characteristics of wide coverage and strong disaster resistance. NTN can either cover a certain application scenario simultaneously with the terrestrial network and serve as an enhancement means for terrestrial network coverage, or provide services independently for isolated islands, remote areas (such as the poles and the ocean), aerospace equipment, etc. It can also greatly enhance the scalability of the 5G network by directly providing broadcast or multicast services to the network edge or user equipment. Satellite communication, as one of the important implementation forms in NTN, is an important part of the space-earth integrated network.

[0003] The downlink transmission process includes downlink control information transmission and downlink data transmission. The physical downlink control channel (PDCCH) carries the control information for scheduling the downlink data shared channel. Therefore, the reliability of downlink data transmission depends on the reliability of the PDCCH.

[0004] NTN communication has a long communication distance and large communication link losses, and there may be a situation where the link budget does not meet the decoding threshold. Summary of the Invention

[0005] This application provides a communication method and a communication device for enhancing the PDCCH and improving the performance and coverage ability of the PDCCH.

[0006] In a first aspect, a communication method is provided. This method is executed by a terminal device, or by some components in the terminal device (such as a processor, a chip, or a chip system, etc.), or this method can also be implemented by a logic module or software that can implement all or part of the functions of the terminal device.

[0007] In a first aspect and its possible implementations, taking the execution of this communication method by a terminal device as an example for description. The method includes: receiving first information, where the first information indicates configuration information of a PDCCH. Or rather, the first information indicates time-frequency resources for transmitting the PDCCH. When conditions are met, listen for the PDCCH on a first PDCCH transmission resource according to the first information. Or rather, the terminal device listens for the repeatedly transmitted PDCCH on the first PDCCH transmission resource, and / or blindly detects the PDCCH at a higher aggregation level, thereby improving the success rate of the terminal device decoding the PDCCH. Among them, the first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing the PDCCH. The enhanced PDCCH includes repeatedly transmitting the PDCCH and / or increasing the aggregation level of the PDCCH. The second PDCCH transmission resource may include PDCCH resources extendedly configured by a network device. The second PDCCH transmission resource may also include idle PDCCH transmission resources. It should be noted that the first PDCCH transmission resource including the second PDCCH transmission resource for enhancing the PDCCH does not mean that the PDCCH is enhanced only on the second PDCCH transmission resource, but rather the PDCCH transmission resources added by the network device for enhancing the PDCCH, so that the PDCCH can be transmitted in the form of enhancing the PDCCH on the first PDCCH transmission resource. The added PDCCH transmission resources are relative to the PDCCH transmission resources actually used for transmitting the PDCCH without enhancing the PDCCH. When conditions are met, enhance the PDCCH by repeatedly transmitting the PDCCH or increasing the PDCCH aggregation level, thereby improving the performance, coverage, and reliability of the PDCCH.

[0008] In a possible implementation, meeting the condition includes meeting at least one of the following conditions: receiving second information, the frequency band corresponding to the received first information being a non-terrestrial network frequency band, and sending third information. The second information indicates enhanced PDCCH. The second information may be determined and sent by a network device to instruct a terminal device to monitor a repeated transmission of PDCCH on a first PDCCH and / or blindly detect PDCCH at a higher aggregation level. The frequency band corresponding to the received first information being a non-terrestrial network frequency band means that the terminal device communicates with the network device through a non-terrestrial network frequency band. The third information indicates enhanced PDCCH, or rather, the third information is used to request enhanced PDCCH from the network device. Or rather, the third information is used to report the terminal device capabilities to the network device, and the terminal device capabilities include the ability to process PDCCH enhancement, that is, the terminal device has the ability to determine the first PDCCH transmission resources, monitor the repeated transmission of PDCCH on the first PDCCH transmission resources, and / or blindly detect PDCCH at a higher aggregation level. Thus, enhancing PDCCH when the downlink performance is poor can improve the success rate of the terminal device decoding PDCCH and improve the reliability of the downlink.

[0009] In a possible implementation, the PDCCH is used to schedule System Information Block (SIB) 1. That is, the transmission resources of the PDCCH are defined by Control Resource Set (CORESET) 0 and type 0 PDCCH common search space set. The method further includes: when conditions are met, determining first PDCCH transmission resources according to first information; the second PDCCH transmission resources are resources configured based on CORESET 0, and / or the second PDCCH transmission resources are resources configured based on type 0 PDCCH common search space set. Or rather, the second PDCCH transmission resources are resources extended through CORESET 0. For example, when conditions are met, the network device configures a CORESET 0 with more resources for the PDCCH. For example, the CORESET 0 includes more resources in the frequency domain, and / or the CORESET includes more symbols in the time domain. Or in a possible scenario, the resource size of CORESET 0 is larger than the PDCCH payload size, that is, the resource size occupied by the PDCCH payload is smaller than the resource size in the configured CORSET 0, and there are idle resources in the PDCCH transmission resources, and the network device utilizes the idle resources to enhance the PDCCH. Or, the second PDCCH transmission resources are resources extended through type 0 PDCCH common search space set. For example, when conditions are met, the network device configures more type 0 PDCCH common search space sets for the PDCCH, increasing the monitoring opportunities of type 0 PDCCH. Thus, the network device can configure transmission resources for the PDCCH to enhance the PDCCH, improving the coverage ability and performance of the PDCCH.

[0010] In a possible implementation, the first information indicates that the synchronization signal block (SSB) / CORESET multiplexing mode is 1. When the SSB / CORESET multiplexing mode is 1, according to the new radio (NR) standard, the terminal device needs to monitor the type 0 PDCCH at the type 0 PDCCH monitoring opportunities in two time slots within an even frame or an odd frame. The first PDCCH transmission resource includes the third PDCCH transmission resource. The third PDCCH transmission resource corresponds to the first type 0 PDCCH monitoring opportunity, and the second PDCCH transmission resource corresponds to the second type 0 PDCCH monitoring opportunity. The first type 0 PDCCH monitoring opportunity is associated with the second type 0 PDCCH monitoring opportunity. The first time slot includes the first type 0 PDCCH monitoring opportunity, and the second time slot includes the second type 0 PDCCH monitoring opportunity. The first time slot and the second time slot belong to the same radio frame. That is, the network device enhances the PDCCH based on the type 0 PDCCH monitoring opportunities on different time slots within the same radio frame. Thus, enhancing the PDCCH on the configured PDCCH transmission resource can effectively utilize resources and improve the coverage ability and performance of the PDCCH. Alternatively, the first time slot and the second time slot belong to two adjacent radio frames respectively. That is, the network device enhances the PDCCH based on the type 0 PDCCH monitoring opportunities in the time slots in odd frames and even frames. Or the first type 0 PDCCH monitoring opportunity and the second type 0 PDCCH monitoring opportunity are for different SSBs with repeated transmissions. The different SSBs with repeated transmissions are the SSBs that schedule the same SIB1, and the different SSBs with repeated transmissions correspond to the same SSB index. Thus, the coverage ability and performance of the type 0 PDCCH are improved. Correspondingly, the terminal device monitors the PDCCH with repeated transmissions at the associated type 0 PDCCH monitoring opportunity and / or blindly detects the PDCCH on the first PDCCH transmission resource at a higher aggregation level, thereby increasing the success rate of decoding the PDCCH.

[0011] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The third PDCCH transmission resource is a resource configured based on the first type0 PDCCH common search space set. The second PDCCH transmission resource is a resource configured based on the second type0 PDCCH common search space set. The first type0 PDCCH common search space set and the second type0 PDCCH common search space set are in the same time slot. The configuration parameters of the type0 PDCCH common search space set include the number of search space sets per slot. More type0 PDCCH common search space sets can be configured within one time slot through this parameter to configure the transmission resources for enhanced PDCCH, thereby improving the coverage ability and performance of the PDCCH. Correspondingly, the terminal device associates the first type0 PDCCH common search space set and the second type0 PDCCH common search space set, monitors the repeatedly transmitted PDCCH at the corresponding monitoring occasion, and / or blindly detects the PDCCH on the first PDCCH transmission resource at a higher aggregation level, thereby increasing the success rate of decoding the PDCCH.

[0012] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same CORESET0. In one implementation, the network device configures more resources on CORESET0 to configure the transmission resources for enhanced PDCCH, that is, the network device configures a CORESET0 with more resources. For example, in another implementation, the network device may not increase the resource size of CORESET0. The network device can utilize the idle resources to enhance the PDCCH, that is, the resource size configured by CORESET0 is larger than the actual occupied resource size of the PDCCH. For the unused idle resources, the network device can utilize them and add the idle resources to the first PDCCH transmission resource for transmitting the PDCCH, thereby enhancing the PDCCH on the first PDCCH transmission resource, improving the resource utilization rate, and improving the coverage ability and performance of the PDCCH. Correspondingly, the terminal device associates the second PDCCH transmission resource and the third PDCCH transmission resource, monitors the repeatedly transmitted PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource, and / or blindly detects the PDCCH on the first PDCCH transmission resource at a higher aggregation level, thereby increasing the success rate of decoding the PDCCH.

[0013] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same search space set. The third PDCCH transmission resource corresponds to a first PDCCH monitoring occasion, and the second PDCCH transmission resource corresponds to a second PDCCH monitoring occasion. The first PDCCH monitoring occasion and the second PDCCH monitoring occasion belong to the same time slot. That is, the network device can configure N monitoring occasions within a time slot based on one search space and associate the N monitoring occasions. The network device repeats transmitting the PDCCH on the PDCCH transmission resources (i.e., the first PDCCH transmission resource) corresponding to the N monitoring occasions, and / or transmits the PDCCH at a higher aggregation level, thereby improving the coverage ability and performance of the PDCCH. Correspondingly, the terminal device associates with the N monitoring occasions, monitors the repeatedly transmitted PDCCH on the N monitoring occasions, and / or blindly detects the PDCCH at a higher aggregation level on the first PDCCH transmission resource, thereby improving the success rate of decoding the PDCCH. Wherein, N is an integer greater than or equal to 2. Optionally, the search space set is a type 0A / 0B / 1 / 1A / 2 / 2A / 3 common search space set, or the search space set is a user-specific search space set.

[0014] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources among the PDCCH transmission resources configured based on the same CORESET and the same search space. Or rather, the first PDCCH transmission resource is a resource configured based on one CORESET and one search space. The search space set can be a type 0 / 0A / 0B / 1 / 1A / 2 / 2A / 3 common search space set, or the search space set can be a user equipment (UE)-specific search space set.

[0015] In a possible implementation, the network device may configure a CORESET with more resources for enhancing the PDCCH. For example, the CORESET with more resources has more resource blocks in the frequency domain and / or more symbols in the time domain. Herein, the CORESET with more resources is relative to the CORESET configured without enhancing the PDCCH. Accordingly, the terminal device associates the second PDCCH transmission resource and the third PDCCH transmission resource in the first PDCCH transmission resource, monitors the repeatedly transmitted PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource, and / or blindly detects the PDCCH at a higher aggregation level on the first PDCCH transmission resource, thereby improving the success rate of decoding the PDCCH.

[0016] In another possible implementation, the network device may not configure a CORESET with more resources for enhancing the PDCCH, but rather utilize the idle resources to enhance the PDCCH when there are idle resources in the PDCCH transmission resources. That is, the first PDCCH transmission resource configured in the case of enhancing the PDCCH is the same as the fourth PDCCH transmission resource configured without enhancing the PDCCH. However, the fourth PDCCH transmission resource configured without enhancing the PDCCH is not actually fully used for transmitting the PDCCH, but there are idle resources, and in the case of enhancing the PDCCH, the idle resources (the second PDCCH transmission resource) are used for transmitting the PDCCH. Accordingly, the terminal device associates the second PDCCH transmission resource and the third PDCCH transmission resource in the first PDCCH transmission resource, monitors the repeatedly transmitted PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource, and / or blindly detects the PDCCH at a higher aggregation level on the first PDCCH transmission resource, thereby improving the success rate of decoding the PDCCH.

[0017] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource. The third PDCCH transmission resource is a resource configured based on a first CORESET and a first search space set. The second PDCCH transmission resource is a resource configured based on a second CORESET and a second search space set. The first CORESET is associated with the second CORESET, the first search space set is associated with the second search space set, and the first CORESET is different from the second CORESET. That is, the network device can associate different CORESETs. Optionally, it can also associate the search space sets corresponding to different CORESETs. The types of the associated search space sets can be the same or different. Optionally, when the candidate PDCCH aggregation levels in the associated search space sets are different, or the number of candidate PDCCHs is different, it can also associate candidate PDCCHs for enhancing the PDCCH. Thus, the configuration flexibility of the first PDCCH transmission resource can be improved.

[0018] In a second aspect, a communication method is provided. This communication method can be executed by a network device. The network device is, for example, an access network device. The network device can be deployed on a satellite or on the ground. Alternatively, this communication method is executed by some components in the network device (such as a processor, a chip, or a chip system, etc.), or this communication method can also be implemented by a logic module or software that can implement all or part of the functions of the network device (such as a DU or an RU, etc.). The method includes: sending first information, where the first information indicates the configuration information of a physical downlink control channel (PDCCH); and when a condition is met, sending a PDCCH on a first PDCCH transmission resource, where the first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing the PDCCH, and the enhanced PDCCH includes repeating the transmission of the PDCCH and / or increasing the aggregation level of the PDCCH.

[0019] In a possible implementation, meeting the condition includes meeting at least one of the following conditions: the elevation angle of the beam for transmitting the first information is less than a preset angle, the first information is transmitted through a non-terrestrial network frequency band, and the third information is received. That the elevation angle of the beam for transmitting the first information is less than the preset angle indicates that the terminal device is located in the coverage edge area of the network device, so that the coverage ability and performance of the PDCCH can be improved by enhancing the PDCCH, thereby improving the success rate of the terminal device decoding the PDCCH. Transmitting the first information through a non-terrestrial network frequency band means that the network device communicates with the terminal device through the NTN frequency band. Since the NTN has a long distance, there may be a situation where the downlink performance is poor. Therefore, enhancing the PDCCH can improve the coverage ability and performance of the PDCCH and ensure the reliability of the downlink. The third information may be sent by the terminal device. The third information indicates the enhanced PDCCH, or the third information is used to request the network device to enhance the PDCCH, or the third information is used to report the capabilities of the terminal device to the network device, such as the ability to support PDCCH enhancement.

[0020] In a possible implementation, the PDCCH is used to schedule SIB1, and the second PDCCH transmission resource is a resource configured based on CORESET0, and / or the second PDCCH transmission resource is a resource configured based on the type0 PDCCH common search space set.

[0021] In a possible implementation, the first information indicates that the SSB / CORESET multiplexing mode is 1. The first PDCCH transmission resource includes a third PDCCH transmission resource. The third PDCCH transmission resource corresponds to a first type0 PDCCH monitoring opportunity. The second PDCCH transmission resource corresponds to a second type0 PDCCH monitoring opportunity. The first type0 PDCCH monitoring opportunity is associated with the second type0 PDCCH monitoring opportunity; the first time slot includes the first type0 PDCCH monitoring opportunity, and the second time slot includes the second type0 PDCCH monitoring opportunity; the first time slot and the second time slot belong to the same radio frame, or the first time slot and the second time slot belong to two adjacent radio frames respectively. Or the first type0 PDCCH monitoring opportunity and the second type0 PDCCH monitoring opportunity are scheduled by different SSBs for repeated transmission.

[0022] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The third PDCCH transmission resource is a resource configured based on the first type0 PDCCH common search space set, the second PDCCH transmission resource is a resource configured based on the second type0 PDCCH common search space set, and the first type0 PDCCH common search space set and the second type0 PDCCH common search space set are in the same time slot.

[0023] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same CORESET0.

[0024] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same search space set. The third PDCCH transmission resource corresponds to the first PDCCH monitoring occasion, the second PDCCH transmission resource corresponds to the second PDCCH monitoring occasion, and the first PDCCH monitoring occasion and the second PDCCH monitoring occasion are in the same time slot.

[0025] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources among the PDCCH transmission resources configured based on the same CORESET and the same search space.

[0026] In a possible implementation, the search space set is a type 0 / 0A / 0B / 1 / 1A / 2 / 2A / 3 common search space set, or the search space set is a UE-specific search space set.

[0027] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource. The third PDCCH transmission resource is a resource configured based on the first CORESET and the first search space set, the second PDCCH transmission resource is a resource configured based on the second CORESSET and the second search space set. The first CORESET is associated with the second CORESET, the first search space set is associated with the second search space set, and the first CORESET is different from the second CORESET.

[0028] In a third aspect, an embodiment of the present application provides a communication device, which has the functions to implement the actions in the method example of the first aspect above. The beneficial effects can be referred to the description of the first aspect and will not be elaborated here. This communication device can be the terminal device in the first aspect, or this communication device can be a device such as a chip or a chip system that can support the terminal device in the first aspect to implement the functions required by the method provided in the first aspect.

[0029] In a possible design, this communication device includes corresponding means or modules for executing the method of the first aspect. For example, this communication device includes a processing unit (sometimes also referred to as a processing module) and / or a transceiver unit (sometimes also referred to as a transceiver module). These units (modules) can execute the corresponding functions in the method example of the first aspect above. For specific details, refer to the detailed description in the method example and will not be elaborated here.

[0030] In a fourth aspect, an embodiment of the present application provides a communication device, which has the functions to implement the actions in the method example of the second aspect above. The beneficial effects can be referred to the description of the second aspect and will not be elaborated here. This communication device can be the network device in the second aspect, or this communication device can be a device such as a chip or a chip system that can support the network device in the second aspect to implement the functions required by the method provided in the second aspect.

[0031] In a possible design, this communication device includes corresponding means or modules for executing the method of the second aspect. For example, this communication device includes a processing unit (sometimes also referred to as a processing module) and / or a transceiver unit (sometimes also referred to as a transceiver module). These units (modules) can execute the corresponding functions in the method example of the second aspect above. For specific details, refer to the detailed description in the method example and will not be elaborated here.

[0032] In a fifth aspect, an embodiment of the present application provides a communication device, which can be the communication device in the third aspect or the fourth aspect in the above embodiments, or a chip or a chip system disposed in the communication device in the third aspect or the fourth aspect. This communication device includes a communication interface and a processor. Optionally, it further includes a memory. The memory is used to store computer programs or instructions or data. The processor is coupled to the memory and the communication interface. When the processor reads the computer programs or instructions or data, the communication device executes the methods executed by the terminal device or the network device in the above method embodiments.

[0033] In a sixth aspect, an embodiment of the present application provides a communication device, which includes at least one processor. Optionally, it further includes a memory, and the at least one processor is coupled to the memory. The at least one processor is used to execute the methods described in the first aspect or the second aspect.

[0034] In a seventh aspect, an embodiment of the present application provides a chip system, which includes a processor and may further include a memory and / or a communication interface for implementing the method described in the first aspect or the second aspect. In a possible implementation, the chip system further includes a memory for storing program instructions and / or data. The chip system may be composed of chips or may include chips and other discrete devices.

[0035] In an eighth aspect, an embodiment of the present application provides a communication system, which includes a communication device for executing the method described in the first aspect and a communication device for executing the method described in the second aspect. Among them, the communication device for executing the method described in the first aspect is, for example, the terminal device described in the first aspect, and the communication device for executing the method described in the second aspect is, for example, the network device described in the second aspect. Optionally, the communication system may further include a positioning management device.

[0036] In a ninth aspect, the present application provides a computer-readable storage medium storing a computer program, which, when run, implements the method in any one of the first aspect to the second aspect above.

[0037] In a tenth aspect, a computer program product is provided, which includes computer program code that, when run, causes the method in any one of the first aspect to the second aspect above to be executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the architecture of a communication system 1000 to which the embodiments of the present application are applied;

[0039] Figure 2a It is a schematic diagram of an NTN network architecture provided by the present application;

[0040] Figure 2b It is another schematic diagram of an NTN network architecture provided by the present application;

[0041] Figure 2c It is another schematic diagram of an NTN network architecture provided by the present application;

[0042] Figure 3 It is a schematic diagram of the flow of a communication method provided by the present application;

[0043] Figure 4 It is a schematic diagram of a first PDCCH resource configuration provided by the present application;

[0044] Figure 5 It is another schematic diagram of a first PDCCH resource configuration provided by the present application;

[0045] Figure 6 Another schematic diagram of the first PDCCH resource configuration provided for this application;

[0046] Figure 7 A possible exemplary block diagram of a communication device involved in this application;

[0047] Figure 8 A schematic structural diagram of a communication device provided for this application;

[0048] Figure 9 A simplified schematic structural diagram of a communication device provided for this application;

[0049] Figure 10 A simplified schematic structural diagram of a terminal device provided for this application. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application.

[0051] In the description of this application, unless otherwise specified, " / " means "or". For example, A / B may represent A or B. The "and / or" in the embodiments of this application is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more. The words such as "first" and "second" do not limit the quantity and execution order, and the words such as "first" and "second" do not necessarily limit being different.

[0052] In this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific manner.

[0053] The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5th generation (5G) system or New Radio (NR) and future communication systems, etc., which are not limited herein. Among them, the embodiments of this application can also be applied to various mobile communication scenarios based on the above various communication systems, such as point-to-point transmission between a base station and a UE, point-to-point transmission between UEs, multi-hop / relay transmission between a base station and a UE, DC (Dual Connectivity) or multi-connection of multiple base stations and UEs, etc.

[0054] Figure 1 FIG. 1000 is a schematic diagram of the architecture of a communication system to which the embodiments of this application are applied. As Figure 1 shown, the communication system includes a radio access network 100 and a core network 200. Optionally, the communication system 1000 may further include the Internet 300. Among them, the radio access network 100 may include at least one radio access network device (such as Figure 1 110a and 110b in FIG. 1), and may further include at least one terminal (such as Figure 1among 120a - 120j). The terminal is connected to the radio access network device wirelessly, and the radio access network device is connected to the core network wirelessly or wired. The core network device and the radio access network device can be independent different physical devices, or the functions of the core network device and the logical functions of the radio access network device can be integrated on the same physical device, or the functions of part of the core network device and part of the radio access network device can be integrated on a physical device. Terminals can be connected to each other, and radio access network devices can be connected to each other, either wired or wirelessly. Figure 1 It is only a schematic diagram, and other network devices can also be included in this communication system, such as wireless relay devices and wireless backhaul devices, which are not drawn in Figure 1 it.

[0055] The radio access network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in the 5th generation (5G) mobile communication system, a next generation NodeB in the 6th generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a wireless local area network (WLAN) system, etc.; it can also be a module or unit that completes part of the functions of a base station. For example, it can be a central unit (CU) or a distributed unit (DU). The radio access network device can be a macro base station (such as Figure 1 110a in Figure 1 ), or a micro base station or an indoor station (such as

[0056] 110b in Figure 1 ), or a relay node or a donor node, etc. The specific technologies and specific device forms adopted by the radio access network device in the embodiments of the present application are not limited.

[0056] In the embodiments of the present application, the device for implementing the functions of the network device can be the network device; it can also be a device that can support the network device to implement this function, such as a chip system, and this device can be installed in the network device. In the technical solutions provided in the embodiments of the present application, taking the device for implementing the functions of the network device as the network device and the network device as a base station as an example, the technical solutions provided in the embodiments of the present application are described.

[0057] A terminal can also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely applied in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, etc. A terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a robotic arm, a smart home device, etc. Embodiments of this application do not limit the specific technologies and specific device forms adopted by the terminal. In the embodiments of this application, the device for implementing the functions of the terminal can be the terminal; it can also be a device capable of supporting the terminal to implement such functions, such as a chip system, and this device can be installed in the terminal. In the embodiments of this application, the chip system can be composed of chips, or can include chips and other discrete devices. In the technical solutions provided by the embodiments of this application, taking the device for implementing the functions of the terminal as the terminal and taking the terminal as the UE as an example, the technical solutions provided by the embodiments of this application are described.

[0058] The base station and the terminal can be fixed in position or movable. The base station and the terminal can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on airplanes, balloons and artificial satellites in the air. Embodiments of this application do not limit the application scenarios of the base station and the terminal.

[0059] The roles of the base station and the terminal can be relative. For example, Figure 1 the helicopter or drone 120i in [FIGURE] can be configured as a mobile base station. For the terminals 120j that access the radio access network 100 through 120i, the terminal 120i is the base station; but for the base station 110a, 120i is the terminal, that is, the communication between 110a and 120i is through the radio air interface protocol. Of course, the communication between 110a and 120i can also be through the interface protocol between base stations. At this time, relative to 110a, 120i is also the base station. Therefore, both the base station and the terminal can be uniformly referred to as communication devices. Figure 1 the 110a and 110b in [FIGURE] can be referred to as communication devices with base station functions. Figure 1 the 120a - 120j in [FIGURE] can be referred to as communication devices with terminal functions.

[0060] Communication can be carried out between a base station and a terminal, between base stations, and between terminals through licensed spectrum, through unlicensed spectrum, or through both licensed and unlicensed spectrum simultaneously; communication can be carried out through spectrum below 6 gigahertz (GHz), through spectrum above 6 GHz, or through both spectrum below 6 GHz and spectrum above 6 GHz simultaneously. Embodiments of this application do not limit the spectrum resources used for wireless communication.

[0061] In embodiments of this application, the functions of a base station can also be performed by modules (such as chips) in the base station, or by a control subsystem that includes base station functions. The control subsystem that includes base station functions here can be a control center in the above application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of a terminal can also be performed by modules (such as chips or modems) in the terminal, or by a device that includes terminal functions.

[0062] In this application, the base station sends a downlink signal or downlink information to the terminal, and the downlink information is carried on the downlink channel; the terminal sends an uplink signal or uplink information to the base station, and the uplink information is carried on the uplink channel. In order to communicate with the base station, the terminal needs to establish a wireless connection with the cell controlled by the base station. The cell that has established a wireless connection with the terminal is called the serving cell of the terminal. When the terminal communicates with the serving cell, it will also be interfered by signals from neighboring cells.

[0063] In embodiments of this application, PDCCH is only an example of a downlink control channel. In different systems and different scenarios, the control channel may have different names, and embodiments of this application do not limit this.

[0064] As Figures 2a - 2c shown, Figures 2a - 2c are schematic diagrams of three NTN network architectures provided by this application. The ground terminal device accesses the network through an air interface (this air interface can be various types of air interfaces, such as 4G / 5G air interfaces, or air interfaces in future networks). As Figure 2a shown, the base station can be deployed on the ground and connected to a ground station that communicates with the satellite. As Figure 2b shown, the base station can also be deployed on the satellite. The satellite is connected to the ground station through a wireless link. The ground station and the ground base station are connected to the core network through wired or wireless means. There can be a wireless link between satellites. As Figure 2c shown, if the satellite only has a transparent forwarding function (that is, the corresponding base station is deployed on the ground), then only transparent forwarding is achieved between satellites. If the base station or some base station functions are deployed on the satellite, then signaling interaction and user data transmission between base stations can be completed between satellites.

[0065] Figures 2a - 2c Some of the network elements and their interfaces are described as follows:

[0066] Ground station: Responsible for forwarding signaling and service data between the satellite base station and the core network.

[0067] Air interface: The wireless link between the terminal and the base station.

[0068] Xn interface: The interface between base stations, mainly used for signaling interaction such as handover.

[0069] NG interface: The interface between the base station and the core network, mainly for interacting with NAS signaling of the core network and user service data.

[0070] This application can be applied to 4G, 5G or future-defined communication systems, involving terminal devices, base stations, and wireless access network elements such as ground stations, and performing uplink and downlink data communication based on wireless communication protocols. It should be noted that if it is a 4G communication system, the Xn interface in the figure is called the X2 interface, and the NG interface is the S1 interface.

[0071] To make the embodiments of this application clearer, some concepts or contents in the embodiments of this application are briefly introduced here.

[0072] 1. Control Resource Set (COREST)

[0073] CORESET can indicate the frequency-domain resource location of the control channel and the symbol length occupied in the time domain. Among them, the symbol can be an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

[0074] In the initial access stage, generally, the COREST first used for communication is CORESET0. CORESET0 occupies a continuous PRB resource in the frequency domain. CORESET0 is used to place the PDCCH payload for scheduling system message SIB1, etc.; after the terminal decodes the SIB system message, other COREST configurations can be obtained through RRC configuration, which can be a discontinuous frequency-domain PRB resource defined by a bitmap;

[0075] Since NR has a large bandwidth, the concept of BWP (bandwidth part) is introduced. The network side can allocate BWPs of different sizes according to different services. On the basis of the BWP concept, CORESET is further introduced. The network side will configure multiple CORESTs and SSs in the BWP, and then determine a time-frequency resource block for different purposes by pairing one COREST with one SS. For example, the time-frequency resource determined by a pair of COREST and SS can be used to check the downlink control information (DCI)-format 0_0 / 1_0, and the time-frequency resource determined by another pair of COREST and SS can be used to check DCI-format 0_1 / 1_1;

[0076] The COREST corresponds to a set of consecutive or non-consecutive PRBs (physical resource blocks) in the frequency domain. The time-domain resource size occupied by the CORESET is 1 to 3 OFDM symbols, and the starting position in the time domain can be flexibly configured; the resource size granularity of the COREST is CCE (channel control element), and each CCE occupies six consecutive REGs (continuous in the frequency domain or continuous in the time domain). One REG consists of one PRB (12 RE resources) in the frequency domain and one OFDM symbol in the time domain;

[0077] For the network side's configuration of the CORESET, in each cell, a maximum of 12 CORESTs (0 to 11) can be configured, and the number of CORESETs in each DL BWP configured by the serving cell for the UE cannot exceed 4; and the CORESET index can only take values from 1 to 11, and index 0 has been occupied by CORESET0;

[0078] 2. Search space set (SS set)

[0079] The search space set can also be referred to as the search space set or search space. The search space can indicate the time-domain position information of the control channel. The control channel mentioned in the embodiments of this application refers to the Physical Downlink Control Channel (PDCCH).

[0080] In the embodiments of this application, the search space set types include two types, namely the common search space set (CSS set) and the UE-specific search space set (USS set). In the embodiments of this application, the common search space set may also be written as the CSS set, and the UE-specific search space set may be written as the USS set. The cells involved in the embodiments of this application may include the primary cell and the secondary cell. Among them, the primary cell is usually configured with a common search space set, and may also be configured with a common search space set and a UE-specific search space set. The secondary cell may be configured with a common search space set, and may also be configured with a common search space set and a UE-specific search space set. In some cases, the secondary cell may be only configured with a UE-specific search space set, which is not limited here.

[0081] When the network device configures a search space set for the terminal device, it will configure a search space set identifier for each search space set. The search space set identifier may also be referred to as the index number of the search space set. When the search space set is a common search space set, the search space set refers to the common search space set identifier. When the search space set is a UE-specific search space set, the search space set refers to the UE-specific search space set identifier.

[0082] The cell involved in the embodiments of this application may, for example, refer to the cell covered by a base station. A cell is an area that provides wireless communication services for users and is the basic unit of a wireless network. For example, NR cell resources are added through MML commands ADD NRCELL and ADD NRDUCELL. The network side device may configure multiple cells for the terminal side device, and one of them is the cell used for initiating initial access, which is called the primary cell, and the other cells become secondary cells. All cells together constitute the coverage of the entire wireless network.

[0083] 3. Aggregation Level (AL)

[0084] The aggregation level refers to the number of control channel elements (CCEs) included in the PDCCH. Currently, the aggregation levels of the PDCCH include AL1, AL2, AL4, AL8, and AL16. When the UE blindly detects (or blind detects) the PDCCH at a certain PDCCH candidate position configured by the network device, it needs to blindly detect according to each possible aggregation level of the PDCCH.

[0085] 4. Blind Detection (BD)

[0086] According to different uses and contents, downlink control information (DCI) is divided into many formats, such as random access radio network temporary identifier (RA-RNTI), paging access radio network temporary identifier (P-RNTI), etc. The PDCCH information of different users is distinguished by its corresponding cell radio network temporary identifier (C-RNTI) information, that is, the cyclic redundancy check (CRC) of DCI is masked by C-RNTI. The base station configures the set of candidate PDCCHs (PDCCH candidates) that the user equipment (UE) needs to monitor through high-layer signaling (such as radio resource control (RRC) signaling). Since the UE does not know in advance which or which PDCCH candidates the base station will send DCI on, but the user knows what downlink control information it currently expects to receive according to the base station configuration information, the UE must try to decode each candidate PDCCH in this set according to the configuration information, that is, the UE uses the corresponding radio network temporary identifier (RNTI) to perform CRC check on the information on the PDCCH candidate. If the CRC check is successful, then the user knows that this DCI information has been successfully decoded, that is, the behavior of the UE trying to decode each candidate PDCCH to determine whether it has received the corresponding DCI is called blind detection. Among them, the set including candidate PDCCHs is the search space set, that is to say, the search space set includes candidate PDCCHs, and candidate PDCCHs are all located in the corresponding CORESET. Therefore, the search space set identifier is associated with the index number of the CORESET where the candidate PDCCHs included in the search space set are located (the index number of the CORESET can also be called the CORESET identifier or CORESET index), and the CORESET associated with the search space set determines the control channel element (CCE) index of the candidate PDCCHs in this search space set within the CORESET.

[0087] 5. Monitoring Opportunity

[0088] The monitoring occasion is also called the PDCCH monitoring occasion (PDCCH MO). The PDCCH monitoring occasion of a search space set (SS set) within one time slot is jointly determined by the configuration information of the SS set and the CORESET associated with it. Specifically, one PDCCH MO consists of a monitoring start symbol and a monitoring duration. The monitoring start symbol (in some places in the embodiments of this application, the monitoring start symbol is also referred to as the start symbol) is the configuration information of a search space set (in some places in the embodiments of this application, the configuration information of the search space set is also referred to as the SS set configuration information), and the monitoring duration (in some places in the embodiments of this application, the monitoring duration is also referred to as the duration) is the configuration information of a control resource set. The SS set configuration information contains a 14-bit bitmap parameter (monitoring symbols within slot, used to indicate the starting OFDM symbol position of the monitoring of a UE for one SS set containing this parameter within one slot), and each bit corresponds one-to-one with one orthogonal frequency division multiplexing (OFDM) symbol (OFDM symbol, OS) within one time slot, and is used to indicate the starting symbol of the monitoring of this SS set within one time slot. Exemplarily, assuming monitoringSymbolsWithinSlot = 10000100000000, it means that the monitoring of this SS set needs to start from the 1st OFDM symbol and the 6th OFDM in one time slot (that is, the monitoring start symbol is the 1st OFDM symbol and the 6th OFDM in one time slot). Assuming that this SS set is associated with a control resource set (CORESET) with a duration of 3 OFDM lengths, then the PDCCH monitoring occasion of this SS set is as follows Figure 3The PDCCH MO1 and PDCCH MO2 shown in the figure. Among them, PDCCH MO1 occupies symbols 0, 1, and 2, and PDCCH MO2 occupies symbols 5, 6, and 7. Among them, CORESET is a concept with a frequency-domain width (in RBs) and a time-domain duration length (in OFDM symbols). After one SSset is associated with one CORESET, the concept of the PDCCH MO corresponding to this SS set can be determined. Therefore, monitoringSymbolsWithinSlot = 10000100000000 can also be described as that one search space set has two PDCCH MO start symbols within one time slot, which are time-domain symbol 0 and time-domain symbol 5 respectively. This search space set is associated with one CORESET with a time-domain duration of 3 symbols, that is, the duration of these two PDCCH MOs is 3 symbols.

[0089] 6. PDCCH Repetition Transmission

[0090] In the discussion of NR Rel-17, the following definition is given for PDCCH repetition transmission: The coding / rate matching operation is based on one PDCCH repetition transmission. Other PDCCH repetition transmissions have the same coded bits. Each repetition transmission uses the same aggregation level (AL) or the same number of CCEs, repeats the same coded bits, and has the same DCI payload information (the DCI bit content is the same).

[0091] It can be understood that the reliability of DCI transmission can be improved by using the multi-station (i.e., the joint transmission mechanism of multiple transmission and reception points (TRPs)). Specifically, for the same DCI information bit (information source), after forming coded bits through the above coding method, multiple TRPs send them on different time-frequency resources respectively. The UE can receive multiple copies of coded bits on the above time-frequency resources respectively, and then perform a joint decoding operation to obtain the DCI information bit (information source). For example, perform channel estimation on the above time-frequency resources respectively and demodulate the received signals to obtain likelihood values (soft information) for merging. The above operations can be equivalently understood as improving the signal-to-noise ratio (SNR) of the transmission, thereby improving the reliability.

[0092] In NTN communication, the communication distance is long and the communication link loss is large. Further considering factors such as the penetration loss of buildings, bridges, viaducts, etc., and the power flux density limit, there may be a situation where the PDCCH link budget does not meet the decoding threshold. Therefore, it is necessary to further enhance the PDCCH channel to ensure the performance of PDCCH in the NTN scenario.

[0093] As Figure 3 shownFigure 3 A flowchart of a communication method provided by this application. This embodiment can be applied in a satellite communication scenario, that is, the network device in this embodiment is deployed on a satellite to improve the coverage and performance of PDCCH in the NTN scenario. This embodiment can also be applied in a terrestrial communication scenario. For example, it can be used to enhance the PDCCH coverage and performance at the cell edge, that is, the network device in this embodiment is deployed on the ground. This embodiment includes the following steps:

[0094] S301: The network device sends first information, and the first information indicates the configuration information of the PDCCH. Correspondingly, the terminal device receives the first information.

[0095] The first information indicates the configuration information of the PDCCH. The configuration information of the PDCCH includes a CORESET and a search space set. The CORESET indicates the frequency-domain resource information occupied by the PDCCH channel and the number of OFDM symbols occupied in the time domain, etc. The search space set indicates the starting OFDM symbol (hereinafter, the OFDM symbol is simply referred to as a symbol) of the resource occupied by the PDCCH transmission in the time domain, the aggregation level of the PDCCH candidates included in this search space set, the number of PDCCH candidates of each aggregation level, the listening period of the PDCCH candidates, and the information of the CORESET associated with this search space set, etc., at least one of them. In the NR standard, each search space set is associated with at most one CORESET, and one CORESET can correspond to multiple different search space sets. A pair of SS set and CORESET (an SS set and its associated CORESET) can determine the listening position of the PDCCH. Thus, the terminal device can determine the time-frequency resource position for transmitting the PDCCH according to the CORESET and the search space, and then listen for the PDCCH at the corresponding time-frequency resource position.

[0096] In this embodiment, the first information may be an information element (IE) or a field indicating the configuration information of PDCCH, or may be an instruction or a message carrying the instruction indicating the configuration information of PDCCH. For example, the first information may be a master information block (MIB) message, an SIB1 message, or other messages, etc. Other messages may be newly defined messages for carrying the configuration information of PDCCH. For another example, the first information may be a radio resource control (RRC) signaling or other signaling, etc. Other signaling may be newly defined signaling for carrying the configuration information of PDCCH. For another example, the first information may be the PDCCH-configSIB1 field in the MIB message, or the ControlResourceSet IE, the serachSpaceZero IE, the searchSpaceOtherSystemInformation IE, the ra-SearchSpace IE, the pagingSearchSpace IE, the searchSpaceSIB1 IE, the SearchSpace IE, the ControlResourceSet IE or other IEs in the signaling PDCCH-ConfigCommon, etc. Other IEs may be newly defined IEs for indicating the configuration information of PDCCH.

[0097] The configuration method of CORESET will be described below. For the configuration of CORESET, in the NR standard, in each cell, up to 12 CORESTs (0 to 11) can be configured at most, and the number of CORESETs in each DL BWP configured by the serving cell for the UE does not exceed 4; and the CORESET index value range is 1 to 11, and index 0 has been occupied by CORESET0.

[0098] CORESET0 is the CORESET dedicated to the type0 CSS set and is used for RMSI (SIB1) scheduling; the resource indication method of CORESET0 originates from the high 4 bits (bit) of the PDCCH-configSIB1 field in the SSB→MIB message. By reading these 4 bits and looking up the table in TS38.213, parameters such as the number of frequency-domain continuous RBs occupied by CORESET0, the number of time-domain symbols, the SSB / COREST0 multiplexing mode, and the frequency-domain physical resource block (PRB) offset can be determined;

[0099] Except for CORESET0, the configuration of other CORESETs is derived from RRC parameter configuration. The configuration of CORESET includes several parameters: control resource set identifier (controlResourceSetId), frequency domain resources (frequencyDomainResources), number of consecutive symbols (duration), and CCE-to-REG mapping type (cce-REG-Mappingtype), etc. Among them, frequency domain resources (frequencyDomainResources): define the size of the frequency domain resources of CORESET, 45 bits, each bit represents 6 PRBs, starting from PRB0, the highest bit represents the lowest frequency in the configured BWP, and the index ascends from bottom to top. The bit positions belonging to COREST should be set to 1. Duration: the number of consecutive symbols in the time domain of CORESET, with values ranging from 1 to 3.

[0100] In NR, the SS set includes the CSS set and the USS set, etc. Among them, the CSS set includes type0 CSS set, type0A CSS set, type0B CSS set, type1 CSS set, type1A CSS set, type2 CSS set, type2A CSS set, type3 CSS set, etc. The CSS set is mainly used for access, cell handover, or for control information related to BCCH, paging, RAR, etc. The configuration methods of different types of SS sets are described below respectively.

[0101] For type0 CSS set, there are the following three configuration methods. 1. The configuration information of type0 CSS set is located in the lower 4 bits of the parameter PDCCH_ConfigSIB1 (this parameter is 8 bits in total) in the MIB message. The terminal device decodes the SSB to obtain the MIB message, reads the lower 4 bits of PDCCH_ConfigSIB1 in the MIB message, and looks up the table TS38.213 to obtain it. This configuration method is used for the downlink synchronization during the initial access of the terminal and is the PDCCH resource used before the terminal obtains the system message (decodes SIB1). 2. The configuration information of type0 CSS set is located in the searchSpaceZero cell of the high-layer parameter PDCCH-ConfigCommon in the RRC signaling. After the terminal device successfully decodes the SIB1 message, it can obtain the reconfiguration of the type0 CSS set resources through the RRC configuration, that is, obtain the high-layer parameter PDCCH-ConfigCommon→searchSpaceZero, and look up the table TS38.213 according to this parameter to obtain the updated configuration of the corresponding type0 CSS set. 3. The configuration information of type0 CSS set is located in the SearchSpace cell in the searchSpaceSIB1 of the high-layer parameter PDCCH-ConfigCommon in the RRC signaling. The SearchSpace cell configures the PDCCH search space through multiple parameters in the RRC signaling (including the PDCCH candidate aggregation level, number, the starting symbol position of PDCCH monitoring, the monitoring slot period and offset, etc.).

[0102] Other types of CSS sets outside type0 CSS set (type0A / 1 / 1A / 2 / 2A / 3 CSS set, etc.) must be configured through the RRC parameters after the terminal device decodes SIB1, and its signaling process is PDCCH-ConfigCommon→commonSearchSpaceList→SearchSpacec.

[0103] For the common search space set of type3 (type3 CSS set), its configuration method belongs to PDCCH-Config→SearchSpace(type Common) in the UE-specific RRC signaling.

[0104] The UE-specific search space set (USS set) also needs to be configured through the RRC signaling after the RRC becomes effective, PDCCH-Config→SearchSpace(type UE-specific).

[0105] For different types of PDCCH, the messages carrying the first information are different. For example, the first information indicates the configuration information of type0-PDCCH (the PDCCH for scheduling SIB1), and this first information is carried in the master information block (MIB) message. Also for example, the first information indicates the configuration information of type0A-PDCCH, type0B-PDCCH, type1-PDCCH, type1A-PDCCH, type2-PDCCH, type2A-PDCCH, type3-PDCCH, etc., and this first information is carried in the RRC signaling.

[0106] The configuration information of type0-PDCCH includes CORESET0 and type0 CSS set. CORESET0 and type0 CSS set are indicated by PDCCH-ConfigSIB1 (an 8-bit field) in the MIB message. The terminal device determines the configurations of CORESET0 and type0 CSS set according to PDCCH-ConfigSIB1. The resource indication method of CORESET0 is derived from the high 4 bits of the field PDCCH-configSIB1 in the SSB→MIB message. Type0 CSS set is derived from the low 4 bits of the field PDCCH-configSIB1 in the SSB→MIB message. The terminal device looks up a table according to the low 4 bits of PDCCH-ConfigSIB1, as well as the SSB / CORESET multiplexing mode, frequency band, etc. to determine the configuration of type0 CSS set, such as the SS index of type0 CSS set, the number of CSS sets in the listening time slot, and the starting symbol of the CSS set within the time slot, etc., and the terminal device determines the time domain position (system frame number (SFN) and slot index within the frame, etc.) of the PDCCH candidate in type0 CSS set listened in the time domain according to the parameters in the table.

[0107] S302: The network device sends the second information, and the second information indicates the enhanced PDCCH. Correspondingly, the terminal device receives the second information.

[0108] The second information indicates the enhanced PDCCH. The network device enhances the PDCCH and sends the second information to the terminal device to indicate that the terminal device listens to and processes the enhanced PDCCH. This step is an optional step and is indicated by a dashed line in Figure 3 it.

[0109] It should be noted that there is no sequence requirement between steps S301 and S302. For example, S301 can be executed first and then S302. Another example is that S302 can be executed first and then S301. Also, for example, S301 and S302 can be executed simultaneously. The case where S301 and S302 are executed simultaneously is, for example, that the first information and the second information are carried in the same message, or the first information is a message or signaling, and the second information is a cell or field in the first information.

[0110] The network device can enhance the PDCCH under certain conditions. For example, the network device can enhance the PDCCH when the downlink performance is poor to improve the PDCCH link performance and reliability and enhance the coverage ability of the PDCCH. The network device enhances the PDCCH when at least one of the following conditions is met:

[0111] 1. The network device communicates with the terminal device through the NTN frequency band. That is, in the NTN scenario, the network device is deployed on a satellite, and the network device and the terminal device can communicate through the NTN frequency band. The NTN frequency band is a satellite-specific frequency band, such as the n255 frequency band or the n256 frequency band, or the NTN frequency band can also be other frequency bands defined in the future for NTN communication.

[0112] 2. The elevation angle of the beam used by the network device for communication with the terminal device to the network device is less than a preset angle, or the elevation angle of the cell center of the cell accessed by the terminal device to the network device is less than a preset angle. The preset angle is, for example, 45 degrees, 40 degrees, 30 degrees, 25 degrees, or 20 degrees, etc. For example, in the NTN scenario, the topology and relative positions of each cell or beam under the satellite are known to the network device. Therefore, the network device can determine the elevation angle of the beam cell center to the network device based on the topology and relative positions of the cell or beam. The elevation angle of the beam or cell center to the network device being less than the preset angle indicates that the terminal device is located in the coverage edge area of the network device, and the link performance may be poor. Therefore, the network device can enhance the PDCCH in this case.

[0113] 3. The network device receives the third information from the terminal device. The third information indicates enhanced PDCCH. Or rather, the third information is used to request the network device to enhance PDCCH. Or rather, the third information is used to notify the network device that the terminal device expects the network device to enhance PDCCH. Or, the third information is used to notify the network device that the terminal device has the ability to handle PDCCH enhancement. That is, before S302, the terminal device sends the third information to the network device, and the network device can perform PDCCH enhancement in response to the third information. Optionally, the network device may send the third information when measuring and confirming that the downlink channel signal quality is poor. For example, the terminal device receives the SSB, measures the reference signal receiving power (RSRP) of the downlink synchronization signal. If the measured value of RSRP is less than the RSRP threshold, the terminal device sends the third information to the network device. Or, the network device may send the third information when it has the ability to handle PDCCH enhancement. The third information is, for example, the terminal capability report of the terminal device, to notify the network device that it has the ability to handle PDCCH enhancement. For example, the terminal device can receive PDCCH retransmission and perform combining processing. Optionally, when the third information is the terminal capability report of the terminal device, the way for the terminal device to send the third information may be: The network device groups the physical random access channel (PRACH) resources in the SIB / RRC message. For example, it groups the preambles, or groups the PRACH occasions (RO). A part of the grouped PRACH resources is associated with the PDCCH retransmission in the common search space set. The terminal device detects the downlink RSRP. When it is less than the RSRP threshold, the terminal device selects the PRACH resources associated with the PDCCH retransmission in the common search space set among the PRACH resources to send the message 1 (msg1), that is, to send the third information to the network device to initiate a request / capability report to the network device. After receiving the third information, the network device uses the third information as a reference to decide whether to perform PDCCH enhancement.

[0114] The network device determines that the conditions for enhancing the PDCCH are met. The network device can enhance the PDCCH by increasing the PDCCH transmission resources, that is, using more time-frequency resources to transmit a PDCCH. In this embodiment, the PDCCH transmission resources may refer to the time-frequency resources used to transmit the PDCCH. The network device determines that the conditions for enhancing the PDCCH are met, configures the first PDCCH transmission resources for transmitting the PDCCH, and the network device can send the second information to the terminal device. The second information indicates that the network device enhances the PDCCH. Thus, the terminal device can determine the first PDCCH transmission resources of the PDCCH according to the first information and the second information, and monitor the enhanced PDCCH on the first PDCCH transmission resources.

[0115] In this embodiment, the first PDCCH transmission resources include the second PDCCH transmission resources. The second PDCCH transmission resources are the transmission resources used to enhance the PDCCH. Optionally, the second PDCCH transmission resources can be interpreted as the time-frequency resources added for enhancing the PDCCH and used to transmit the PDCCH. The second PDCCH transmission resources can be all the transmission resources added for enhancing the PDCCH. The second PDCCH transmission resources can also be part of the transmission resources added for enhancing the PDCCH.

[0116] In a possible implementation, the first PDCCH transmission resource may be an extended transmission resource. That is, the network device configures more PDCCH transmission resources to enhance the PDCCH. That is, the size of the first PDCCH transmission resource is greater than the size of the fourth PDCCH transmission resource. The fourth PDCCH transmission resource is the PDCCH transmission resource configured by the network device when the condition is not met, that is, when the PDCCH is not enhanced. Or rather, compared with the PDCCH transmission resource configured by the network device when the PDCCH is not enhanced, the network device configures more PDCCH transmission resources when the PDCCH is enhanced. The second PDCCH transmission resource is the newly added transmission resource after the PDCCH transmission resource is extended. Exemplarily, when the PDCCH is not enhanced, the size of the fourth PDCCH transmission resource configured by the network device is 48 resource blocks (RBs). When the PDCCH is enhanced, the size of the first PDCCH transmission resource configured by the network device is 192 RBs. That is, the network device adds 144 RBs to enhance the PDCCH, and the second PDCCH transmission resource is the newly added transmission resource relative to the fourth PDCCH transmission resource. The size of the second PDCCH transmission resource may be 144 RBs, or may be less than 144 RBs, such as 24 RBs, 48 RBs, or 96 RBs, etc., which is not limited here. It can be understood that the first PDCCH transmission resource, the second PDCCH transmission resource, the fourth PDCCH transmission resource, and the differences between the first PDCCH transmission resource and the second PDCCH transmission resource are only examples here and should not be construed as a limitation to this application.

[0117] In another possible implementation, when the condition is met, the network device enhances the PDCCH without expanding the total PDCCH transmission resources. That is, the network device does not configure more PDCCH transmission resources to enhance the PDCCH. For example, the network device can utilize the idle PDCCH resources to enhance the PDCCH. In this case, the size of the first PDCCH transmission resource is the same as that of the fourth PDCCH transmission resource. Or rather, when enhancing the PDCCH, the first PDCCH transmission resource configured by the network device is the same as the fourth PDCCH transmission resource configured when not enhancing the PDCCH. That is, when the condition is met, the network device does not expand the total PDCCH transmission resources to enhance the PDCCH, but utilizes the idle PDCCH transmission resources in the fourth PDCCH transmission resource to enhance the PDCCH. In this case, the second PDCCH transmission resource can be the idle resources in the fourth PDCCH transmission resource. The idle resources are the resources in the fourth PDCCH transmission resource that are not used or occupied. Exemplarily, the size of the fourth PDCCH transmission resource is 48 RBs, and the PDCCH payload actually occupies 24 RBs of them, then the remaining 24 RBs are not used to send the PDCCH payload, that is, there are 24 RBs of idle resources in the fourth PDCCH transmission resource. Then, the network device can utilize the 24 RBs of idle resources to enhance the PDCCH without additionally configuring new PDCCH transmission resources to enhance the PDCCH.

[0118] In another implementation, the network device can also enhance the PDCCH by using different PDCCH monitoring opportunities without expanding the total PDCCH transmission resources. For example, the network device configures multiple PDCCH monitoring opportunities for the PDCCH according to the standard protocol. When the condition is met, the network device associates multiple PDCCH monitoring opportunities and utilizes the PDCCH transmission resources corresponding to the multiple PDCCH monitoring opportunities to enhance the PDCCH.

[0119] The first PDCCH transmission resource further includes the third PDCCH transmission resource. The third PDCCH transmission resource does not overlap with the second PDCCH transmission resource.

[0120] In this embodiment, enhancing the PDCCH includes but is not limited to the following methods:

[0121] 1. PDCCH retransmission, or increasing the number of PDCCH retransmissions. For example, a single PDCCH transmission is enhanced to PDCCH retransmission. Also for example, PDCCH is retransmitted 2 times and enhanced to be retransmitted 3 times, 4 times or more times. The network device may repeat the transmission of PDCCH in a frequency-division multiplexing manner or may transmit PDCCH in a time-division multiplexing manner, which is not limited herein. The network device may associate a second PDCCH transmission resource and a third PDCCH transmission resource and associate the corresponding candidate PDCCHs in the second PDCCH transmission resource and the third PDCCH transmission resource, so that the network device can repeat the transmission of PDCCH on the associated candidate PDCCHs.

[0122] 2. Increasing the PDCCH aggregation level. Increasing the PDCCH aggregation level can reduce the code rate of the PDCCH payload, thereby improving the performance of the PDCCH and the success rate of the terminal device decoding the PDCCH. Exemplarily, if the PDCCH aggregation level is 4, the PDCCH aggregation level can be increased to 8, 16, 20, 24, 32, 64 or a larger aggregation level; if the PDCCH aggregation level is 8, the PDCCH aggregation level can be increased to 16, 20, 24, 32, 64 or a larger aggregation level; if the PDCCH aggregation level is 16, the PDCCH aggregation level can be increased to 20, 24, 32, 64 or a larger aggregation level, and so on. The network device may use the first PDCCH transmission resource as a resource pool and transmit PDCCH on the first PDCCH transmission resource at a higher aggregation level.

[0123] 3. PDCCH retransmission and increasing the PDCCH aggregation level. That is, both PDCCH retransmission and increasing the PDCCH aggregation level can be performed.

[0124] When the network device determines an enhanced PDCCH when the conditions are met, it sends second information to the terminal device, and the second information indicates the enhanced PDCCH. Accordingly, the terminal device determines that the PDCCH will be enhanced according to the second information, determines the first PDCCH transmission resource according to the first information, and monitors the repeatedly transmitted PDCCH on the first PDCCH transmission resource, and / or blindly detects the PDCCH at a higher aggregation level. Blindly detecting the PDCCH at a higher aggregation level may mean blindly detecting the PDCCH starting from the maximum aggregation level. Alternatively, blindly detecting the PDCCH at a higher aggregation level may mean that the terminal device blindly detects the PDCCH starting from the first aggregation level, where the first aggregation level is greater than the second aggregation level, and the second aggregation level is the aggregation level used by the terminal device when blindly detecting the PDCCH without enhancing the PDCCH. For example, when the PDCCH is not enhanced, the PDCCH is blindly detected starting from aggregation level 4, and when the PDCCH is enhanced, the PDCCH is blindly detected starting from aggregation levels 8 / 16 / 20 / 24 / 32 / 64, without blindly detecting the PDCCH at aggregation level 4. Alternatively, in a possible implementation, the second information indicates the aggregation level used by the network device, and the terminal device blindly detects the PDCCH based on this aggregation level.

[0125] In a possible scenario, the network device configures more PDCCH transmission resources (the first PDCCH transmission resources are greater than the fourth PDCCH transmission resources) to enhance the PDCCH. However, the first information remains unchanged compared to the case where the PDCCH is not enhanced. Then, the second information can instruct the terminal device to interpret the PDCCH transmission resources including more resources (i.e., the first PDCCH transmission resources) according to the first information, and associate the second PDCCH transmission resources and the third PDCCH transmission resources in the first PDCCH transmission resources, so as to monitor the repeatedly transmitted PDCCH on the second PDCCH transmission resources and the third PDCCH transmission resources, and / or blindly detect the PDCCH at a higher aggregation level on the first PDCCH transmission resources. In another possible scenario, the network device does not configure more PDCCH transmission resources (the first PDCCH transmission resources are the same as the fourth PDCCH transmission resources), and the first information remains unchanged compared to the case where the PDCCH is not enhanced. Then, the second information can instruct the terminal device to associate the second PDCCH transmission resources and the third PDCCH transmission resources in the first PDCCH transmission resources, so as to monitor the repeatedly transmitted PDCCH on the second PDCCH transmission resources and the third PDCCH transmission resources, and / or blindly detect the PDCCH at a higher aggregation level on the first PDCCH transmission resources. In yet another possible scenario, the network device configures more PDCCH transmission resources (the first PDCCH transmission resources are greater than the fourth PDCCH transmission resources) to enhance the PDCCH, and the first information indicates the first PDCCH transmission resources. Then, the second information can instruct the terminal device to associate the second PDCCH transmission resources and the third PDCCH transmission resources in the first PDCCH transmission resources, so as to monitor the repeatedly transmitted PDCCH on the second PDCCH transmission resources and the third PDCCH transmission resources, and / or blindly detect the PDCCH at a higher aggregation level on the first PDCCH transmission resources.

[0126] Optionally, associating the second PDCCH transmission resources and the third PDCCH transmission resources in the first PDCCH transmission resources further includes associating the corresponding candidate PDCCHs in the second PDCCH transmission resources and the third PDCCH transmission resources. The network device can repeatedly send the PDCCH on the associated candidate PDCCHs, and the terminal device monitors the repeatedly sent PDCCH on the associated candidate PDCCHs. The second PDCCH transmission resources may include at least one candidate PDCCH, and the third PDCCH transmission resources may include at least one candidate PDCCH. For example, the candidate PDCCHs with the same index in the second PDCCH transmission resources and the third PDCCH transmission resources can be associated, or the candidate PDCCHs with the same aggregation level in the second PDCCH transmission resources and the third PDCCH transmission resources can be associated.

[0127] In this embodiment, there are multiple implementation manners for the second information. The second information may be a specific value, a cell, a message, etc. The second information may be carried in the MIB message, or may be carried in the RRC signaling. Alternatively, the second information may also be carried in the DCI. The second information may be a newly set cell in the MIB message / RRC signaling / DCI, or may be carried in an idle or reserved field in the MIB information / RRC signaling / DCI. The second information may include at least one of the following parameters:

[0128] 1. PDCCH enhancement switch. The PDCCH enhancement switch is used to indicate whether the PDCCH is enhanced. The size of the PDCCH enhancement switch may be 1 bit, so as to reduce the overhead of the second information. For example, when the value of the PDCCH enhancement switch is 0, it indicates that the PDCCH is enhanced, and when the value of the PDCCH enhancement switch is 1, it indicates that the PDCCH is not enhanced. Alternatively, when the value of the PDCCH enhancement switch is 1, it indicates that the PDCCH is enhanced, and when the value of the PDCCH enhancement switch is 0, it indicates that the PDCCH is not enhanced. Of course, the size of the PDCCH enhancement switch may also be 2 bits, 3 bits or larger, which is not limited here. In another implementation manner, the PDCCH enhancement switch may be a cell. When the network device sends this cell, it indicates that the PDCCH is enhanced, and when the network device does not send this cell, it indicates that the PDCCH is not enhanced. Alternatively, when the network device sends this cell, it indicates that the PDCCH is not enhanced, and when the network device does not send this cell, it indicates that the PDCCH is enhanced. When the PDCCH enhancement switch indicates that the PDCCH is not enhanced, the terminal device determines the fourth PDCCH transmission resource according to the first information and monitors the PDCCH on the fourth PDCCH transmission resource. When the PDCCH enhancement switch indicates that the PDCCH is enhanced, it triggers the terminal device to determine the first PDCCH transmission resource according to the first information and monitors the PDCCH on the first PDCCH transmission resource. Optionally, when the PDCCH enhancement switch indicates that the PDCCH is enhanced, it triggers the terminal device to associate the resources in the first PDCCH transmission resource with the candidate PDCCHs, for example, associate the second PDCCH transmission resource and the third PDCCH transmission resource, and associate the corresponding candidate PDCCHs in the second PDCCH transmission resource and the third PDCCH transmission resource, so that the terminal device monitors the repeatedly transmitted PDCCHs on the associated candidate PDCCHs, and / or blindly detects the PDCCH at a higher aggregation level.

[0129] 2. The PDCCH retransmission count. Alternatively, it can also be referred to as the PDCCH retransmission factor. The PDCCH retransmission count indicates how many times the PDCCH is retransmitted so that the second information can accurately indicate the retransmission count. In one possible implementation, the size of the PDCCH retransmission count can be 1 bit. For example, when the value of the PDCCH retransmission count is 0, it indicates that the PDCCH is not retransmitted; when the value of the PDCCH retransmission count is 1, it indicates that the PDCCH is retransmitted 2, 3, 4, or more times. Alternatively, when the value of the PDCCH retransmission count is 1, it indicates that the PDCCH is not retransmitted, and when the value of the PDCCH retransmission count is 0, it indicates that the PDCCH is retransmitted 2, 3, 4, or more times. In another possible implementation, the size of the PDCCH retransmission count can be 2 bits. For example, when the value of the PDCCH retransmission count is 00, it indicates that the PDCCH is not retransmitted; when the value of the PDCCH retransmission count is 01, it indicates that the PDCCH is retransmitted 2 times; when the value of the PDCCH retransmission count is 10, it indicates that the PDCCH is retransmitted 3 times; when the value of the PDCCH retransmission count is 11, it indicates that the PDCCH is retransmitted 4 times. It can be understood that the value of the PDCCH retransmission count and the PDCCH retransmission count indicated by the value of the PDCCH retransmission count here are all examples and should not be construed as a limitation on this application. For example, the value of the PDCCH retransmission count being 11 can also be used to indicate that the PDCCH is not retransmitted, or the value of the PDCCH retransmission count being 10 indicates that the PDCCH is retransmitted 4 times, etc., and no more examples are given here. Of course, the size of the PDCCH retransmission count can also be 3 bits, 4 bits, or more bits, and no limitation is made here. When the value of the PDCCH retransmission count indicates that the PDCCH is retransmitted more than 2 times, that is, when it indicates that the network device enhances the PDCCH, it triggers the terminal device to determine the first PDCCH transmission resource according to the first information and receive the retransmitted PDCCH on the first PDCCH transmission resource according to the PDCCH retransmission count.

[0130] 3. PDCCH aggregation level. The PDCCH aggregation level can indicate whether the aggregation level of transmitting the PDCCH is increased. Alternatively, the PDCCH aggregation level can indicate which aggregation level the network device adopts to enhance the PDCCH. In a possible implementation, the size of the PDCCH aggregation level can be 1 bit. For example, when the value of the PDCCH aggregation level is 0, it indicates that the aggregation level of the PDCCH is not increased; when the value of the PDCCH aggregation level is 1, it indicates that the network device transmits the PDCCH using a higher PDCCH aggregation level. Alternatively, when the value of the PDCCH aggregation level is 1, it indicates that the aggregation level of the PDCCH is not increased, and when the value of the PDCCH aggregation level is 0, it indicates that the network device transmits the PDCCH using a higher PDCCH aggregation level. In another possible implementation, the size of the PDCCH aggregation level transmission can be 2 bits. For example, when the value of the PDCCH aggregation level is 00, it indicates that the aggregation level of the PDCCH is not increased; when the value of the PDCCH aggregation level is 01, it indicates that the PDCCH aggregation level is 8; when the value of the PDCCH aggregation level is 10, it indicates that the PDCCH aggregation level is 16; when the value of the PDCCH aggregation level is 11, it indicates that the PDCCH aggregation level is 32. It can be understood that the value of the PDCCH aggregation level and the PDCCH aggregation level indicated by the value of the PDCCH aggregation level here are all examples and should not be construed as a limitation to this application. For example, when the value of the PDCCH aggregation level is 11, it can also be used to indicate that the aggregation level of the PDCCH is not increased, or the PDCCH aggregation level is 64, or when the value of the PDCCH aggregation level is 00, it indicates that the PDCCH aggregation level is 8, and so on. Examples are not given one by one here. Of course, the size of the PDCCH aggregation level can also be 3 bits, 4 bits or more bits, which is not limited here. When the value of the PDCCH aggregation level indicates that the network device increases the PDCCH aggregation level, that is, when the network device enhances the PDCCH, it triggers the terminal device to determine the first PDCCH transmission resource according to the first information, and blindly detect the PDCCH on the first PDCCH transmission resource according to the PDCCH aggregation level, or blindly detect the PDCCH starting from a higher PDCCH aggregation level, or blindly detect the PDCCH starting from the highest PDCCH aggregation level, thereby improving the blind detection efficiency.

[0131] 4. Associated CORESET. The associated CORESET indicates at least two associated CORESETs. Further, there is an association between the search space sets corresponding to the at least two associated CORESETs. Or rather, at least two CORESETs are associated, and there is an association between the search space sets respectively associated with the at least two CORESETs. Optionally, the second information includes the associated CORESET and the associated search space sets, and the associated search space sets are the search space sets respectively associated with the associated CORESET. For example, when at least one CORESET is associated with multiple search space sets, the second information may include the associated CORESET and the associated search space sets. Optionally, the second information includes the associated CORESET and the associated search space sets, as well as the associated candidate PDCCHs in the associated search space sets. For example, when the PDCCH candidate aggregation levels and numbers in the associated multiple search space sets are different, the second information may further indicate the associated candidate PDCCHs in the associated search space sets. The associated search space sets may be of the same type of search space sets or different types of search space sets. Thus, when the network device enhances the PDCCH, the flexibility of the first PDCCH transmission resource configuration can be improved. The terminal device can determine the first PDCCH transmission resource according to the associated CORESET and the first information, and the first PDCCH transmission resource includes the PDCCH transmission resource configured based on the associated CORESET and the associated search space sets.

[0132] 5. Offset value. The offset value can be a symbol offset value, or a time slot offset value, or an interval duration, etc. The offset value indicates the offset of the second PDCCH transmission resource relative to the third PDCCH transmission resource in the time domain.

[0133] In this embodiment, the network device can enhance the PDCCH in the common search space, such as type0 CSS set, type0A CSS set, type0B CSS set, type1 CSS set, type1A CSS set, type2 CSS set, type2A CSS set, type3 CSS set. The network device can also enhance the PDCCH in the USS set, such as increasing the PDCCH retransmission times in the USS set, where the PDCCH retransmission times in the USS set are greater than or equal to 3 times. From the description of S301, it can be seen that different types of search space sets and different types of CORESETs are configured differently. Therefore, for the PDCCH in different types of search space sets, the way the network device configures the first PDCCH transmission resource, the way the network device sends the second information, and the way the terminal device determines the first PDCCH transmission resource are different.

[0134] The following separately describes the enhancement method of the PDCCH in the type0 CSS set and the enhancement method of the PDCCH in other types of search spaces (search spaces other than the type0 CSS set, such as including type0A CSS set, type0B CSS set, type1 CSS set, type1A CSS set, type2 CSS set, type2A CSS set, type3 CSS set, and USS set, etc.).

[0135] I. Enhancement of the PDCCH in the type0 CSS set (hereinafter simply referred to as type0 PDCCH, and this type0 PDCCH is used to schedule SIB1)

[0136] The type of the CORESET for type0 CSS set is CORESET0 (i.e., the CORESET with index 0). The type0 CSS set and CORESET0 jointly define the transmission resources of the candidate PDCCHs of the type0 CSS set. The resource configuration method of the type0 PDCCH is described in S301, that is, the high four bits of the parameter PDCCH-ConfigSIB1 in the MIB carry the configuration information of CORESET0, and the low four bits carry the configuration information of the type0 CSS set. The terminal device determines the SSB / CORESET multiplexing mode, the number of consecutive PRBs occupied by CORESET0, and the number of OFDM symbols (sometimes simply referred to as symbols in the following text) according to the high four bits of PDCCH-ConfigSIB1 by looking up a table. The terminal device determines the SS index of the type0 CSS set, the number of CSS sets in the listening time slot, and the starting OFDM symbol of the SS set in the slot according to the low four bits of PDCCH-ConfigSIB1 by looking up a table.

[0137] For type0 PDCCH, when the conditions are met, there are multiple ways for the network device to configure the first PDCCH transmission resources to enhance the type0 PDCCH. Correspondingly, there are also multiple ways for the terminal device to determine the first PDCCH transmission resources. The following PDCCH enhancement methods 1 to 5 are the enhancement methods for type0 PDCCH.

[0138] Method 1: Enhance the PDCCH based on the associated type0 PDCCH listening opportunity

[0139] The NR standard stipulates that the SSB / CORESET multiplexing mode is 1, and the terminal device is configured to listen for type0 PDCCH in two time slots, and the two time slots include the associated type0 PDCCH listening opportunity. The associated type0 PDCCH listening opportunity includes, for example, the first type0 PDCCH listening opportunity and the second type0 PDCCH listening opportunity. The first type0 PDCCH listening opportunity and the second type0 PDCCH listening opportunity belong to two different time slots respectively, and the terminal device needs to listen for type0 PDCCH at the first type0 PDCCH listening opportunity and the second type0 PDCCH listening opportunity. The two time slots can be two adjacent time slots, such as time slot n 0 and time slot n 0 +1. The two time slots can also be two non-adjacent time slots, such as time slot n 0 and time slot n 0 +4, or time slot n 0 and time slot n 0+8 etc. In the NR standard, the associated type0 PDCCH monitoring occasion is not specified for retransmitting type0 PDCCH, that is, the associated type0 PDCCH monitoring occasion is not used to enhance type0 PDCCH.

[0140] In this method, the network device enhances type0 PDCCH based on the associated type0 PDCCH monitoring occasion. For example, the network device retransmits type0 PDCCH at the associated type0 PDCCH monitoring occasion. And / or, the network device transmits PDCCH at a higher aggregation level on the resources corresponding to the associated type0 PDCCH monitoring occasion. Specifically, the first PDCCH transmission resource includes the resources corresponding to the associated type0 PDCCH monitoring occasion. For example, the first PDCCH transmission resource includes the second PDCCH transmission resource and the third PDCCH transmission resource, the third PDCCH transmission resource is the resource corresponding to the first type0 PDCCH monitoring occasion, and the second PDCCH transmission resource is the resource corresponding to the second type0 PDCCH monitoring occasion. The network device enhances type0 PDCCH on the first PDCCH transmission resource. For example, the second PDCCH transmission resource and the third PDCCH transmission resource are associated, and the network device can retransmit type0 PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource. Or, the network device transmits type0 PDCCH at a higher aggregation level on the first PDCCH transmission resource. Or, the network device can increase the aggregation level of type0 PDCCH and retransmit the type0 PDCCH on the first PDCCH transmission resource.

[0141] The network device sends the first information and the second information to the terminal device. The first information includes, for example, PDCCH-ConfigSIB1. Thus, the terminal device can determine the configuration information of CORESET0 and type0 CSS set according to the first information by looking up the table, and the SSB / CORESET multiplexing mode is 1, so as to determine the associated type0 PDCCH monitoring occasion. In this method, the second information indicates that PDCCH is enhanced based on the associated type0 PDCCH monitoring occasion. Further, in response to the second information, the terminal device monitors and combines the retransmitted type0 PDCCH at the associated type0 PDCCH monitoring occasion, and / or blindly detects type0 PDCCH candidates at a higher aggregation level.

[0142] Exemplarily, as Figure 4 shown. Figure 4It is assumed that the system frame number is even, the first information indicates that CORESET0 occupies two consecutive symbols, the SSB / CORESET multiplexing mode is 1, the first information also indicates that the starting OFDM symbol of type0 CSS se in the slot is 0, and the associated type0 PDCCH monitoring opportunities (type0 PDCCH MO1 and type0 PDCCH MO2) belong to two consecutive time slots (slot10 and slot11) respectively. Slot10 includes type0 PDCCH MO1, and slot11 includes type0 PDCCH MO2, indicating that the terminal device needs to monitor the PDCCH in type0 PDCCH MO1 of slot10 and type0 PDCCH MO2 of slot11. The network device determines that the conditions are met, enables PDCCH enhancement, sends the second information to the terminal device, and the network device repeatedly sends type0 PDCCH in type0 PDCCH MO1 of slot10 and type0 PDCCH MO2 of slot11. The terminal device then determines type0 PDCCH MO1 of slot10 and type0 PDCCH MO2 of slot11 according to the first information, and determines that type0 PDCCH MO1 and type0 PDCCH MO2 are used for type0 PDCCH enhancement according to the second information, so as to monitor the repeatedly transmitted type0 PDCCH in type0 PDCCH MO1 and type0 PDCCH MO2, and combine the repeatedly transmitted type0 PDCCH.

[0143] In this method, the second piece of information may be a PDCCH enhancement switch. The terminal device can determine that the network device enables PDCCH enhancement based on the second piece of information. As a result, the terminal listens for and combines the repeatedly transmitted type 0 PDCCH on the associated type 0 PDCCH monitoring occasion, and / or blindly detects type 0 PDCCH candidates at a higher aggregation level. Alternatively, the second piece of information may also be the PDCCH repeated transmission count. The terminal device can determine that the network device repeatedly transmits the type 0 PDCCH on the associated type 0 PDCCH monitoring occasion and the number of repeated transmissions based on the second piece of information. For example, the PDCCH repeated transmission count indicates that the number of times the type 0 PDCCH is repeatedly transmitted is 2. Consequently, the terminal device listens for and combines the type 0 PDCCH transmitted twice on the associated type 0 PDCCH monitoring occasion according to the PDCCH repeated transmission count. Alternatively, the second piece of information may also be the PDCCH aggregation level, enabling the terminal device to blindly detect type 0 PDCCH candidates at the aggregation level indicated by the second piece of information, thereby improving the blind detection efficiency. Alternatively, the second piece of information includes at least two of the PDCCH enhancement switch, the PDCCH repeated transmission count, and the PDCCH aggregation level. The PDCCH enhancement switch, the PDCCH repeated transmission count, and the PDCCH aggregation level can be referred to the relevant descriptions above, so they will not be elaborated here.

[0144] Method 2: Enhancing PDCCH based on the search space set within a time slot

[0145] When the PDCCH is not enhanced, the terminal device may configure the fourth PDCCH transmission resource for the PDCCH. When the PDCCH is enhanced, the terminal device may configure the first PDCCH transmission resource for the PDCCH, and send the first information and the second information to the terminal device to indicate the first PDCCH transmission resource, and indicate that the first PDCCH transmission resource is used for the enhanced PDCCH. The first PDCCH transmission resource is larger than the fourth PDCCH transmission resource. Or rather, compared with the case where the PDCCH is not enhanced, when the PDCCH is enhanced, the network device configures more transmission resources for the PDCCH. Or rather, the network device expands the PDCCH transmission resources to enhance the PDCCH. Or rather, the network device reconfigures the PDCCH transmission resources for the PDCCH. In this method, the network device may expand the PDCCH transmission resources based on the type0 CSS set. For example, the network device configures N type0 CSS sets within a time slot, and the PDCCH transmission resources corresponding to the N type0 CSS sets are associated. N is an integer greater than or equal to 2, and the maximum value of N is not greater than the number of symbols within a time slot. The first PDCCH transmission resource includes the PDCCH transmission resources corresponding to the N type0 CSS sets. The N type0 CSS sets include, for example, the first type0 PDCCH common search space set and the second type0 PDCCH common search space set. The first PDCCH transmission resource includes the second PDCCH transmission resource and the third PDCCH transmission resource. The third PDCCH transmission resource is the resource configured based on the first type0 PDCCH common search space set, and the second PDCCH transmission resource is the resource configured based on the second type0 PDCCH common search space set. Or rather, the network device reconfigures the number of type0 CSS sets within a time slot to configure the first PDCCH transmission resource, and repeats the transmission of the PDCCH on the first PDCCH transmission resource, and / or transmits the PDCCH at a higher aggregation level.

[0146] When the PDCCH is not enhanced, the terminal device queries the configuration parameter table of the first type0 CSS set (such as TS38.213 Table 13-11 to 13-15A) according to the first information (for example, including the lower four bits of PDCCH-ConfigSIB1) to determine the configuration of the type0 CSS set. Exemplarily, the configuration parameter table of the first type0 CSS set is shown in Table 1. It can be understood that only a certain row in TS38.213 Table 13-11 to 13-15A is used as an illustration here.

[0147] Table 1. Configuration parameter table of the first type0 CSS set

[0148]

[0149] In a possible implementation, when enhancing the PDCCH, a configuration parameter table of a second type0 CSS set is deployed on the terminal device. Compared with the configuration parameter table of the first type0 CSS set, the number of search space sets per slot parameter in the configuration parameter table of the second type0 CSS set can include a larger number of search space sets, that is, each time slot includes a larger number of search space sets. Optionally, the configuration parameter table of the second type0 CSS set also indicates the starting symbol of each search space set. The terminal device responds to the second information, queries the configuration parameter table of the second type0 CSS set according to the first information to determine the configuration of the type0 CSS set. For example, there are N search spaces in a time slot, and the terminal device associates the N search space sets. Exemplarily, the configuration parameter table of the second type0 CSS set is shown in Table 2. It can be understood that the values of the search space sets and the starting symbol index in the number of search space sets per slot in Table 2 are only for illustration. For example, the value of the number of search space sets per slot can also be 3, 4, 5, 6 or larger, etc. The starting symbol index can also be any symbol index that is different in the time domain, and the type0 PDCCH monitoring opportunities corresponding to the starting symbol index do not overlap with each other. And only one row is listed in Table 2, and there can be more rows in the actual Table 2.

[0150] Table 2. Configuration Parameter Table of the Second Type0 CSS Set

[0151]

[0152] It should be noted that the configuration parameter table of the second type0 CSS set can be a newly introduced table. Or, the configuration parameter table of the second type0 CSS set can also be obtained by retaining (reserved) row configuration parameters (configuring a larger number of search space sets in the number of search space sets per slot, configuring more starting symbols in the first symbol index, etc.) in the existing configuration parameter table of the type0 CSS set, and no limitation is made here.

[0153] In another implementation, the terminal device may not deploy the configuration parameter table of the second type0 CSS set, but query Table 1 according to the first information to obtain the configuration parameters of the type0 CSS set, and then expand the value of the number of search space sets per slot to N in response to the second information, that is, each time slot includes N search space sets, and obtain the starting symbol index of each search space set of the N search space sets. Here, N and the starting symbol index of each search space set of the N search space sets may be preset values, or may be calculated according to a preset algorithm, or N is the value indicated by the second information (PDCCH repetition transmission times), and no limitation is made here.

[0154] If each time slot includes N search space sets, then each time slot correspondingly includes N PDCCH monitoring opportunities. The terminal device monitors the PDCCH with repeated transmissions at the N PDCCH monitoring opportunities, or blindly detects the PDCCH monitored at the N PDCCH monitoring opportunities with a higher aggregation level.

[0155] It should be noted that this Method 2 is applicable to SSB / CORESET multiplexing modes 1, 2, and 3. Optionally, when the SSB / CORESET multiplexing mode is 1, Method 1 and Method 2 can be combined, that is, the PDCCH is enhanced both based on the search space sets within the time slot and based on the type0 PDCCH monitoring opportunities associated between time slots. In this case, the first PDCCH transmission resource includes the transmission resources corresponding to 2N search space sets. Exemplarily, as Figure 5 shown Figure 5 Taking an example that there are two search space sets in one time slot, through PDCCH enhancement, the first PDCCH transmission resource includes the PDCCH transmission resource 1 (the resource corresponding to the first type0 CSS set) and the PDCCH transmission resource 2 (the resource corresponding to the second type0 CSS set) in slot10, and the PDCCH transmission resource 3 (the resource corresponding to the first type0 CSS set) and the PDCCH transmission resource 4 (the resource corresponding to the second type0 CSS set) in slot10. The PDCCH can be transmitted 4 times on the PDCCH transmission resources 1-4. Of course, the PDCCH transmission resources within one time slot can also be used as a resource pool to send the PDCCH with a higher aggregation level, and the PDCCH with a higher aggregation level is repeatedly transmitted between time slots, and no limitation is made here.

[0156] In this method, the second piece of information may be a PDCCH enhancement switch. The terminal device can determine, based on the second piece of information, that the network device enables PDCCH enhancement. As a result, the terminal listens for and combines the repeatedly transmitted PDCCH on N PDCCH monitoring opportunities within a time slot, or blindly detects PDCCH candidates with a higher aggregation level. Alternatively, the second piece of information may also be the number of PDCCH retransmission times N. The terminal device can determine, based on the second piece of information, that the network device retransmits the PDCCH on N PDCCH monitoring opportunities within a time slot. Consequently, the terminal device listens for and combines the type 0 PDCCH transmitted N times on the PDCCH monitoring opportunities corresponding to N search spaces according to the number of PDCCH retransmission times N. Alternatively, the second piece of information includes at least two of a PDCCH enhancement switch, the number of PDCCH retransmission times, and a PDCCH aggregation level. The PDCCH enhancement switch, the number of PDCCH retransmission times, and the PDCCH aggregation level can be referred to the relevant descriptions above, so they will not be elaborated here.

[0157] Method 3: Enhance the PDCCH based on the search space set between frames

[0158] In SSB / CORESET multiplexing mode 1, as specified by the NR standard, the terminal device listens for the PDCCH on the type 0 PDCCH monitoring opportunities within the odd or even frames of each radio frame. In this method, the network device can configure the type 0 CSS set monitoring opportunities and the corresponding PDCCH transmission resources in two time slots within each frame of the radio frame, and the network device sends the second piece of information to the terminal device. The network device associates the type 0 PDCCH monitoring opportunities in the odd frames with those in the even frames. That is, the first PDCCH transmission resource includes the transmission resources corresponding to the type 0 PDCCH monitoring opportunities in adjacent odd and even frames. The type 0 PDCCH monitoring opportunities in one of the adjacent odd and even frames correspond to the second PDCCH transmission resource, and the other frame corresponds to the third PDCCH transmission resource. The network device retransmits the PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource, and / or sends the PDCCH with a higher aggregation level on the first PDCCH transmission resource. Correspondingly, the terminal device responds to the second piece of information and listens for the repeatedly transmitted PDCCH in adjacent radio frames, and / or blindly detects the PDCCH with a higher aggregation level.

[0159] In this method, the second piece of information may include at least one of a PDCCH enhancement switch, the number of PDCCH retransmission times, and a PDCCH aggregation level. The PDCCH enhancement switch, the number of PDCCH retransmission times, and the PDCCH aggregation level can be referred to the relevant descriptions above, so they will not be elaborated here.

[0160] Method 4: Enhancing PDCCH Based on CORESET (Expanding the Resource Size of CORESET0)

[0161] When PDCCH is not enhanced, the terminal device can configure the fourth PDCCH transmission resource for the PDCCH. When PDCCH is enhanced, the terminal device can configure the first PDCCH transmission resource for the PDCCH, and send the first information and the second information to the terminal device to indicate the first PDCCH transmission resource, and indicate that the first PDCCH transmission resource is used for enhanced PDCCH. The first PDCCH transmission resource is larger than the fourth PDCCH transmission resource. Or rather, compared with the case where PDCCH is not enhanced, the network device configures more transmission resources for the PDCCH when PDCCH is enhanced. Or rather, the network device expands the PDCCH transmission resources to enhance PDCCH. Or rather, the network device reconfigures the PDCCH transmission resources for the PDCCH. In this method, the network device can expand the PDCCH transmission resources based on CORESET0. Or rather, the network device configures the transmission resources for enhanced PDCCH based on CORESET0. For example, the network device configures more resource blocks in the frequency domain, or configures more symbols in the time domain, or configures more resource blocks in the frequency domain and more symbols in the time domain to expand the resource size of CORESET0. Or rather, the network device reconfigures CORESET0 to configure the first PDCCH transmission resource, and repeats the transmission of PDCCH on the first PDCCH transmission resource, and / or transmits the PDCCH at a higher aggregation level.

[0162] When PDCCH is not enhanced, the terminal device queries the configuration parameter table of the first type0 CSS set (such as TS38.213 Table13-11 to 13-15A) according to the first information (for example, including the lower four bits of PDCCH-ConfigSIB1) to determine the configuration of the type0 CSS set. Exemplarily, the configuration parameter table of the first type0 CSS set is shown in Table 1. It can be understood that only a certain row in TS38.213 Table13-1 to Table13-10A is used as an illustration here.

[0163] When PDCCH is not enhanced, the terminal device determines the configuration of the first CORESET0 by looking up a table according to the upper 4 bits of the parameter PDCCH-ConfigSIB1. Exemplarily, the first CORESET0 is shown in Table 3. It can be understood that the parameters in the first CORESET0 are only for illustration and should not be construed as a limitation to this application.

[0164] Table 3. Configuration Parameter Table of the First CORESET0

[0165]

[0166] When enhancing the PDCCH, the terminal device responds to the second information and determines the configuration of the second CORESET0 by looking up a table according to the upper 4 bits of the parameter PDCCH-ConfigSIB1. Exemplarily, as shown in Table 4.

[0167] Table 4. Configuration Parameter Table of the Second CORESET0

[0168]

[0169] Or, as shown in Table 5.

[0170] Table 5. Configuration Parameter Table of the Second CORESET0

[0171]

[0172] Or, as shown in Table 6.

[0173] Table 6. Configuration Parameter Table of the Second CORESET0

[0174]

[0175] That is, it is possible to only expand the frequency-domain resources of CORESET0 (Table 4), or only expand the number of consecutive symbols in the time domain of CORESET0 (Table 5), or expand both the frequency-domain resources and the number of consecutive symbols in the time domain of CORESET0 (Table 6). It can be understood that the parameter values in the second CORESET0 shown in Tables 4 - 6 are only for illustration and only represent the resource expansion method of CORESET0, and should not be construed as a limitation to this application. And only one row is listed in Tables 4 - 6, and there can actually be more rows in Tables 4 - 6. It should be noted that this Method 4 is applicable to SSB / CORESET multiplexing modes 1, 2, and 3.

[0176] It should be noted that the configuration parameter table of the second CORESET0 can be a newly introduced table. Or, the configuration parameter table of the second CORESET0 can also be obtained from the reserved row configuration parameters (more RB numbers configured, more symbol numbers configured, etc.) of the existing CORESET0 configuration parameter table, and no limitation is imposed here.

[0177] In another implementation, the terminal device may not deploy the configuration parameter table of the second CORESET0, but query Table 3 according to the first information to obtain the configuration parameters of CORESET0, and then respond to the second information, and determine more RB quantities and / or determine more symbol quantities based on the configuration parameters of CORESET0 obtained from Table 3. The expanded RB quantity and / or the expanded symbol quantity may be a preset value, may also be calculated according to a preset algorithm, or may be indicated by the second information (for example, the second information includes the parameter of the PDCCH retransmission times), which is not limited here.

[0178] By configuring CORESET0 with a larger resource size, the first PDCCH transmission resource has a larger transmission resource compared with the fourth PDCCH transmission resource. The network device retransmits the PDCCH on the first PDCCH transmission resource, and / or transmits the PDCCH at a larger aggregation level, so that the terminal device can listen to the retransmitted PDCCH on the first PDCCH transmission resource, and / or blindly detect the PDCCH at a larger aggregation level.

[0179] In this method, the first PDCCH transmission resource includes the second PDCCH transmission resource and the third PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources in the resources configured based on the same CORESET0 and the same type0 CSS set. Optionally, the second information further indicates the association between the second PDCCH transmission resource and the third PDCCH transmission resource in the first PDCCH transmission resource, so that the terminal device listens to the retransmitted PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource according to the second information.

[0180] In this method, the second information may include at least one of a PDCCH enhancement switch, a PDCCH retransmission times, and a PDCCH aggregation level. The PDCCH enhancement switch, the PDCCH retransmission times, and the PDCCH aggregation level can refer to the relevant descriptions above, so they are not elaborated here.

[0181] Method 5: Enhance the PDCCH based on the idle resources in the CORESET

[0182] When the resource size configured by CORESET0 is greater than the resource size actually occupied by the PDCCH, that is, when there are idle resources in the fourth PDCCH transmission resource, the network device can use the idle resources to enhance the PDCCH. That is, the network device can retransmit the PDCCH in the idle resources, or transmit the PDCCH at a higher aggregation level on the fourth PDCCH transmission resource. And the network device sends the second information to the terminal device.

[0183] The second piece of information indicates that the PDCCH is repetitively transmitted on the first PDCCH transmission resource and / or transmitted with a higher aggregation level, so that the PDCCH fills the first PDCCH transmission resource (the PDCCH is transmitted using all resources in the first PDCCH transmission resource). The terminal device determines the first PDCCH transmission resource (i.e., the fourth PDCCH transmission resource) according to the first piece of information, and listens for the repetitively transmitted PDCCH on the first PDCCH transmission resource according to the second piece of information, or blindly detects the PDCCH with a higher aggregation level. Thus, the resource utilization rate can be improved, and the PDCCH performance can be improved.

[0184] In this method, the second piece of information may include at least one of a PDCCH enhancement switch, the number of PDCCH repetitive transmissions, and the PDCCH aggregation level. The PDCCH enhancement switch, the number of PDCCH repetitive transmissions, and the PDCCH aggregation level can refer to the relevant descriptions above, so they will not be elaborated here.

[0185] Method 6: Enhance the PDCCH based on the PDCCH transmission resource corresponding to the repetitively transmitted SSB

[0186] The configuration information of the PDCCH (PDCCH-configSIB1 in the MIB) is carried in the SSB. When the SSB is repetitively transmitted, the payloads of the repetitively transmitted SSBs are the same, so the same configuration information of the PDCCH is carried in the repetitively transmitted SSBs. Moreover, since the indexes of the repetitively transmitted SSBs are also the same, it will cause the terminal device to determine the same type0 PDCCH listening opportunity, or rather, determine the same PDCCH transmission resource, according to the configuration information of the PDCCH in the different repetitively transmitted SSBs. The PDCCH transmission resource indicated in the SSB is used to schedule SIB1. Different repetitively transmitted SSBs can correspond to different PDCCH transmission resources, and one SSB corresponds to one PDCCH transmission resource. These different PDCCH transmission resources are used to schedule the same SIB1, but the terminal device can only map the different repetitively transmitted SSBs to the same type0 PDCCH listening opportunity.

[0187] In this method, for different PDCCH transmission resources corresponding to different SSBs of repeated transmission, the network device can associate the PDCCH transmission resources corresponding to the repeated transmission of SSBs, so as to repeatedly transmit type 0 PDCCH on the associated PDCCH transmission resources. The network device can also send second information to the terminal device. The terminal device can associate different PDCCH transmission resources corresponding to different SSBs of repeated transmission according to the second information, so as to receive the repeatedly transmitted type 0 PDCCH on the associated PDCCH transmission resources. The first PDCCH transmission resources include, for example, the PDCCH transmission resources corresponding to the repeated transmission of SSBs. It should be noted that different PDCCH transmission resources corresponding to different SSBs of repeated transmission refer to being different in time domain, and the sizes of the PDCCH transmission resources corresponding to different SSBs of repeated transmission are the same, for example, having the same consecutive symbols and resource blocks.

[0188] In this method, the terminal device can determine different PDCCH transmission resources corresponding to different SSBs of repeated transmission according to the offset value.

[0189] Optionally, the second information can indicate the offset value. The offset value can be a symbol offset value, a time slot offset value, or an interval duration. The offset value indicates the time interval between adjacent PDCCH transmission resources in the time domain among the associated PDCCH transmission resources. Thus, even if the same PDCCH configuration information is carried in the repeatedly transmitted SSBs and the indexes of the repeatedly transmitted SSBs are the same, the terminal device can determine the positions in the time domain of the PDCCH transmission resources corresponding to each repeated transmission of SSBs according to the second information. For example, according to the PDCCH configuration information carried in the SSB, the position in the time domain of the PDCCH transmission resources corresponding to the first transmission in the repeatedly transmitted SSB can be determined (for example, it is the type 0 PDCCH monitoring occasion 1), the position in the time domain of the PDCCH transmission resources corresponding to the second transmission in the repeatedly transmitted SSB is type 0 PDCCH monitoring occasion 1 + offset value, and the position in the time domain of the PDCCH transmission resources corresponding to the third transmission in the repeatedly transmitted SSB is type 0 PDCCH monitoring occasion 1 + 2 * offset value... and so on. The second information can be 2 bits. Exemplarily, 00 indicates that PDCCH enhancement is not performed, 01 indicates that the offset value is 10 milliseconds (ms), 10 indicates that the offset value is 20 ms, and 11 indicates that the offset value is 30 ms. It can be understood that the offset value indicated by the second information here is only an example and should not be construed as a limitation of this application, and the second information can also indicate symbol or time slot offset values. For example, 01 can also indicate 20 ms, 40 ms, etc., and can also indicate 14 symbols, 28 symbols, or indicate 1 time slot, 2 time slots, etc.

[0190] Optionally, the second information may indicate the PDCCH enhancement switch or the PDCCH retransmission count. The PDCCH enhancement switch and the PDCCH retransmission count can be referred to the relevant descriptions above and will not be elaborated here. When the second information indicates PDCCH enhancement, the terminal device may obtain an offset value and determine the PDCCH transmission resources corresponding to different SSBs for retransmission according to the offset value. In one implementation, in this case, the offset value may be preset, or the offset value is pre-configured on the terminal device, that is, when the second information indicates PDCCH enhancement, the terminal device may determine that the interval between adjacent PDCCH transmission resources in the time domain among the PDCCH transmission resources corresponding to different SSBs for retransmission is the offset value. In another implementation, the offset value may be determined according to the time interval between adjacent SSBs in the time domain among the SSBs for retransmission. For example, the offset value is equal to the time interval.

[0191] Optionally, the offset value between the PDCCH transmission resources corresponding to the SSBs for retransmission may also not be indicated by the second information. For example, when the terminal device determines that the network device enhances the PDCCH based on the PDCCH transmission resources corresponding to the SSBs for retransmission (determines that the SSB is retransmitted and meets the conditions for PDCCH enhancement), the offset value is obtained through Table 7. Since the same PDCCH configuration information is carried in the SSBs for retransmission, the same row in the same table can be determined according to the PDCCH configuration information carried in the SSBs for retransmission. The terminal device determines the position in the time domain of the PDCCH transmission resources corresponding to the current SSB according to which transmission the current SSB is in the SSBs for retransmission.

[0192] Table 7. Configuration parameter table of type0 CSS set

[0193]

[0194] It can be understood that the parameter values in Table 7 are only examples, and only one row is listed in Table 7. Actually, Table 7 may have more rows, and it should not be construed as a limitation to this application. In Table 7, the offset value is taken as the interval duration for example. It can be understood that the offset value may also be a symbol offset value, or a time slot offset value, etc., and no limitation is made here.

[0195] Table 7 adds a column compared to Table 1. Of course, it is also possible not to indicate the offset value by adding an "offset value" column based on Table 1. When the terminal device determines that the network device enhances the PDCCH based on the PDCCH transmission resource corresponding to the repeated transmission of the SSB, the terminal device calculates the PDCCH monitoring opportunity corresponding to the PDCCH transmission resource through a preset algorithm. The preset algorithm includes a preset offset value, and the input parameter of the preset algorithm may include the repetition sequence number of the current SSB (i.e., which transmission of the SSB with repeated transmission it is), so that the PDCCH transmission resource corresponding to the current SSB can be obtained according to the preset algorithm, and the offset in the time domain relative to the PDCCH transmission resource corresponding to the first transmitted SSB in the SSB with repeated transmission can be accurately determined, and the PDCCH transmission resources corresponding to different SSBs with repeated transmission can be determined, and then the type0 PDCCH with repeated transmission can be monitored on the corresponding PDCCH transmission resource.

[0196] It should be noted that at least two of the above methods one to six can be combined with each other. For example, method one and method two are combined, method two and method four are combined, method one and method six are combined, method two and method three are combined, or method three and method five are combined, or method four and method five are combined, method one, method two and method three are combined, method one, method three and method four are combined, etc. Examples are not given one by one here.

[0197] Exemplarily, taking the combination of method one and method four as an example for illustration, assume that when the PDCCH is not enhanced, the network device configures CORESET0 with a size of 48 RBs (for example ) for the PDCCH, and the aggregation level of the PDCCH is 8. When the PDCCH is enhanced, the network device configures CORESET0 with a larger resource for the PDCCH (for example ), and enhances the PDCCH by using the first type0 PDCCH monitoring opportunity and the second type0 PDCCH monitoring opportunity. The resource sizes corresponding to the first type0 PDCCH monitoring opportunity and the second type0 PDCCH monitoring opportunity are both 96 RBs. The network device can send the PDCCH twice on the first type0 PDCCH monitoring opportunity and send the PDCCH twice on the second type0 PDCCH monitoring opportunity, and the aggregation level of the PDCCH is 8. Or, the network device can send the PDCCH once on the first type0 PDCCH monitoring opportunity and send the PDCCH once on the second type0 PDCCH monitoring opportunity, and the aggregation level of the PDCCH is 16.

[0198] Exemplarily, taking the combination of method two and method five as an example for illustration, assume that when the PDCCH is not enhanced, the network device configures CORESET0 with a size of 48 RBs (for example ) The CORESET0, the number of type0 CSS sets within a time slot is 1, the aggregation level of the PDCCH is 8, 24 RBs are actually used for transmitting this PDCCH, and the size of the idle resources is 24 RBs. When enhancing the PDCCH, the network device configures the PDCCH with a size of 48 RBs (for example ) The CORESET0, the number of type0 CSS sets within a time slot is 2, and 2 type0 CSS sets within the associated time slot (for example, the first type0 CSS set and the second type0 CSS set). The resource size of the second PDCCH transmission resource (the resource configured based on the second type0 CSS set and the CORESET) is 48 RBs, and the resource size of the second PDCCH transmission resource (the resource configured based on the first type0 CSS set and the CORESET) is 48 RBs. The network device can send the PDCCH twice on the second PDCCH transmission resource (each PDCCH transmission uses 24 RBs), send the PDCCH twice on the third PDCCH transmission resource (each PDCCH transmission uses 24 RBs), and the aggregation level of the PDCCH is 8, that is, this PDCCH is transmitted 4 times in total. Alternatively, the network device can send the PDCCH once with an aggregation level of 16 on the second PDCCH transmission resource, and send the PDCCH once with an aggregation level of 16 on the third PDCCH transmission resource, that is, this PDCCH is transmitted 2 times in total.

[0199] In Methods 1 to 6, there are multiple ways for the network device to send the second information. In one implementation, the second information can be carried in the MIB message. For example, the second information can be carried in the 1-bit reserved bit (spare) in the MIB message. Also, for example, in the frequency range (FR)-1 band, there are 2 reserved bits in the additional 8 bits (bit) of the PBCH payload, and the second information can be carried in any of these 2 reserved bits, or carried in these 2 reserved bits. Also, for example, when the PDCCH subcarrier spacing (SCS) (or the common subcarrier spacing (SubCarrierSpacingCommon) in the MIB) indicates 15 Khz in the FR1 band, there is an unused 1 bit in the synchronization broadcast block subcarrier offset boundary offset (Kssb), and the second information can be carried in this 1 bit. This is because the NR standard stipulates that for FR1, for SSB type A, that is, numerology: {μ = 0, 1}, SSB SCS = 15 khz or 30 khz, the value of Kssb needs to be determined by 5 bits, where the MSB (the most significant bit) comes from the sixth bit of the 8-bit PBCH payload in TS38.211), the remaining 4 LSBs come from the field ssb-SubcarrierOffset in the MIB. During actual configuration, when the PDCCH SCS is 30 Khz, 5 bits are required to determine Kssb. When the PDCCH SCS is 15 Khz, Kssb can be determined by 4 bits. Therefore, when indicating 15 Khz in the FR1 frequency band, there is 1 unused bit in Kssb. Of course, it is also possible to add a new parameter in the MIB message to carry the second information, and there is no restriction here. When more bits are required to carry the second information, at least two of the 1-bit reserved bit in the MIB message, the 2 reserved bits in the additional 8 bits of the PBCH payload, and the 1 unused bit in Kssb when indicating 15 Khz in the FR1 frequency band can be used to carry the second information.

[0200] II. Enhancement of PDCCH outside the type0 CSS set

[0201] For other types of common search space configurations (type0A / 0B / 1 / 1A / 2 / 2A CSS set, etc.), after the terminal device decodes the SIB1 message, it obtains the PDCCH-ConfigCommon→SearchSpace configuration from the RRC signaling. This configuration is a list that includes the configurations of multiple search space sets. Each configuration has a different search space type, the corresponding DCI format, the aggregation level and number of PDCCH candidates included, etc. For the type3 CSS set and USS set, after the terminal device decodes the SIB1 message, it obtains the PDCCH-Config→SearchSpace configuration from the RRC signaling, which includes the configurations of multiple search space sets. Each configuration has a different search space type (type), the corresponding DCI format, the aggregation level and number of PDCCH candidates included, etc.

[0202] The first information includes, for example, the SearchSpace in PDCCH-ConfigCommon or the SearchSpace in PDCCH-Config. The first information can also include the configuration information of the CORESET.

[0203] Method 7: Enhance the PDCCH based on the monitoring opportunity within a time slot

[0204] In one implementation, the network device uses the second information to indicate to the terminal device that the PDCCH resources configured within the corresponding search space set (type0A / 0B / 1 / 1A / 2 / 2A / 3 CSS set, or USS set) can be associated, that is, the M PDCCH monitoring opportunities within the same time slot can be associated. The PDCCH transmission resources corresponding to the associated M PDCCH monitoring opportunities are the first PDCCH transmission resources. Thus, the network device enhances the PDCCH on the first PDCCH transmission resources. The M PDCCH monitoring opportunities include, for example, a first PDCCH monitoring opportunity and a second PDCCH monitoring opportunity. The transmission resources corresponding to the first PDCCH monitoring opportunity are the third PDCCH transmission resources, and the transmission resources corresponding to the second PDCCH monitoring opportunity are the second PDCCH transmission resources. The terminal device determines the first PDCCH transmission resources according to the second information, associates the second PDCCH transmission resources and the third PDCCH transmission resources, monitors the PDCCH with repeated transmissions on the second PDCCH transmission resources and the third PDCCH transmission resources, and / or blindly detects the PDCCH at a higher aggregation level on the first PDCCH transmission resources. M is an integer greater than or equal to 2.

[0205] Exemplarily, as Figure 6As shown, taking type0A / 0B / 1 / 1A / 2 / 2A CSS set and PDCCH MO being 2 as an example, it can be configured that the signaling element SearchSpace→monitoringSymbolsWithinSlot = 10000001000000, indicating that the starting symbols (0 and 7) of the monitoring opportunities for two groups of PDCCH are configured in this slot. When CORESET0 occupies two OFDM symbols, it means that the network side configures two PDCCH monitoring opportunities (or PDCCH transmission resources) within one slot through the SearchSpace parameter. The two PDCCH monitoring opportunities are, for example, PDCCH MO1 and PDCCH MO2. PDCCH MO1 is OFDM symbols 0 and 1, and PDCCH MO2 is OFDM symbols 7 and 8. Then, through the second information, the PDCCH transmission resources corresponding to multiple PDCCH monitoring opportunities included in this CSS set can be associated (to obtain the first PDCCH transmission resource), and the PDCCH is repeatedly transmitted on the associated PDCCH resources, and / or transmitted at a higher aggregation level. Correspondingly, the terminal device determines the association of multiple monitoring opportunities within the time slot according to the second information, and monitors the repeatedly transmitted PDCCH on the PDCCH transmission resources (the first PDCCH transmission resource) corresponding to multiple PDCCH monitoring opportunities, and / or blindly detects the PDCCH at a higher aggregation level. It can be understood that the starting symbols of the PDCCH monitoring opportunities here are only examples and should not be construed as a limitation to this application. The starting symbols can also be other symbols, such as 0 and 4, or 0 and 8, etc., which are not limited here.

[0206] Method 8: Enhancing PDCCH based on CORESET

[0207] For the PDCCH in type0A / 0B / 1 / 1A / 2 / 2A / 3 CSS set or USS set, the PDCCH transmission resources can also be extended by reconfiguring the associated CORESET. For example, the time-domain resources (increasing the number of symbols) and / or frequency-domain resources (increasing the number of resource blocks) in the associated CORESET can be increased to obtain the first PDCCH transmission resource. Furthermore, the network device sends the first information and the second information to the terminal device to indicate the first PDCCH transmission resource, and the second PDCCH transmission resource and the third PDCCH transmission resource associated with the first PDCCH transmission resource are used for PDCCH enhancement. The terminal device responds to the second information and monitors the repeatedly transmitted PDCCH on the first PDCCH transmission resource, or blindly detects the PDCCH at a higher aggregation level.

[0208] Method 9: Enhancing PDCCH based on the idle resources in CORESET

[0209] When the resource size configured for the CORESET is greater than the resource size actually occupied by the PDCCH, that is, when there are idle resources in the fourth PDCCH transmission resource, the network device can utilize the idle resources to enhance the PDCCH. That is, the network device can repeat the transmission of the PDCCH in the idle resources, or transmit the PDCCH at a higher aggregation level on the fourth PDCCH transmission resource. Moreover, the network device sends the second information to the terminal device.

[0210] The second information indicates that the PDCCH is repeatedly transmitted on the first PDCCH transmission resource, and / or transmitted at a higher aggregation level, so that the PDCCH fills the first PDCCH transmission resource (transmit the PDCCH using all resources in the first PDCCH transmission resource). The terminal device determines the first PDCCH transmission resource (i.e., the fourth PDCCH transmission resource) according to the first information, and listens for the repeatedly transmitted PDCCH on the first PDCCH transmission resource according to the second information, or blindly detects the PDCCH at a higher aggregation level. Thus, the resource utilization rate can be improved, and the PDCCH performance can be improved.

[0211] In Modes 7 to 9, there are multiple ways for the network device to send the second information. In one implementation, the second information can be carried in the MIB message. For example, the second information can be carried in the 1-bit spare bit in the MIB message. Also for example, in the FR-1 frequency band, there are 2 reserved bits in the additional 8 bits of the PBCH payload, and the second information can be carried in any of the 2 reserved bits, or carried in the 2 reserved bits. Also for example, when the PDCCH SCS (or SubCarrierSpacingCommon in the MIB) indicates 15 Khz in the FR1 frequency band, there is an unused 1 bit in the synchronization broadcast block subcarrier offset boundary offset (Kssb), and the second information can be carried in this 1 bit. Of course, it can also be to add a new parameter in the MIB message to carry the second information, which is not limited here. When more bits are needed to carry the second information, at least two of the 1-bit spare bit in the MIB message, the 2 reserved bits in the additional 8 bits of the PBCH payload, and the unused 1 bit in the Kssb when indicating 15 Khz in the FR1 frequency band can be used to carry the second information.

[0212] In another implementation, the second information can also be carried in the RRC signaling. For example, a new higher-layer parameter introduced in SIB1 can occupy an overhead of 1 bit, 2 bits, 3 bits or more.

[0213] In another implementation, the second information may be carried in DCI. For example, for a type 0 PDCCH of non-scheduled SIB1, such as, in the random access channel (RACH) phase, scheduling a downlink control channel (PDCCH) such as Msg2, Msg3, Msg4, Msg5, etc., these channels may be type 0A / 0B / 1 / 1A / 2 / 2A PDCCH, etc. For the transmission of type 0A / 0B / 1 / 1A / 2 / 2A PDCCH, there are already multiple interactive signaling messages between the terminal and the network side. The network device uses some bits in the reserved bits of the DCI for scheduling Msg2, that is, the reserved bits in the DCI format 1_0 scrambled by RA-RNTI (there are 16 reserved bits in this DCI in the protocol) to carry the second information, so as to indicate to the terminal device the enhancement of the PDCCH in the subsequent common search space. Optionally, the second information may occupy multiple bits, and each bit indicates the enhancement of one type of PDCCH among type 0A / 0B / 1 / 1A / 2 / 2A PDCCHs in the subsequent downlink channel. Different bits among the multiple bits may indicate the enhancements of different types of PDCCHs. The multiple bits are, for example, 2 bits, 3 bits, 4 bits or more bits, etc. Exemplarily, taking 3 bits as an example, one bit may indicate the enhancement of type 0A PDCCH in all subsequent downlink channels, one bit may indicate the enhancement of type 1 PDCCH in all subsequent downlink channels, and one bit may indicate the enhancement of type 2 PDCCH in all subsequent downlink channels. Of course, the second information may also be 1 bit, indicating the enhancement of one type of PDCCH among type 0A / 0B / 1 / 1A / 2 / 2A PDCCHs.

[0214] Also, for example, in addition to using the reserved bits in the DCI for scheduling Msg2 to carry the second information, other DCI may also be used to carry the second information. The idle bit positions in the RAR UL grant for scheduling the initial transmission of Msg3. Or, by reinterpreting some fields in the DCI for scheduling Msg3 and Msg4, for example, the MCS field in the DCI has 5 bits, and two of them may carry the second information, etc.

[0215] Method Ten: Enhancing PDCCH Based on Search Space Sets Associated with Different CORESETs

[0216] After the terminal device decodes the SIB message, it obtains the RRC high-layer parameter PDCCH-ConfigCommon from the SIB, that is, the PDCCH resource configuration at the cell level. This parameter contains the cell commonControlResourceSet, which is used to provide the terminal with additional CORESET configurations other than CORESET0.

[0217] Each CORESET configured for the terminal device corresponds to a different search space set, which contains the respective PDCCH candidate configurations (aggregation level, number).

[0218] This method can introduce new parameters in the SIB message to enable the association between multiple CORESETs and the association of PDCCH candidates between different SS sets (regardless of the search space type) corresponding to multiple CORESETs. That is, the first PDCCH transmission resource includes the resources configured based on multiple associated search space sets. The multiple associated CORESETs include, for example, a first CORESET and a second CORESET, and the multiple associated search space sets include, for example, a first SS set and a second SS set. The first SS set is associated with the first CORESET, and the second SS set is associated with the second CORESET. The first PDCCH transmission resource includes a second PDCCH transmission resource and a third PDCCH transmission resource. The third PDCCH transmission resource is the resource configured based on the first CORESET and the first SS set, and the second PDCCH transmission resource is the resource configured based on the second CORESSET and the second SS set. Thus, the flexibility of the network device to cooperate with the first PDCCH transmission resource can be improved. When enhancing the PDCCH, the network device repeats sending the PDCCH in the PDCCH candidates corresponding to the associated second PDCCH transmission resource and third PDCCH transmission resource, or sends the PDCCH at a higher aggregation level.

[0219] In a possible implementation, a new cell can be introduced in the SIB message. The new cell indicates the associated CORESET index and the corresponding associated SearchSpace index. Optionally, the new cell is, for example, "linked_CoresetIndexes_SearchSpaceIndexes". In this method, the second information includes this new cell.

[0220] When the aggregation levels of PDCCH candidates and the number of candidates for each aggregation level in multiple configured SS sets are the same, the above cell configuration defaults to the association of corresponding PDCCH candidates in each SS set (for example, the PDCCH candidate with index 1 in each SS set is associated and has the same aggregation level and number). When the aggregation levels and numbers of PDCCH candidates in multiple configured SS sets are different, in addition to the above cell configuration, the index of the specific PDCCH candidate to be associated in the associated SS set can be indicated.

[0221] Thus, after receiving the second information, the terminal device determines the associated search space and the associated PDCCH candidate, so that it can monitor the PDCCH with repeated transmission on the associated PDCCH candidate or blindly detect the PDCCH candidate at a higher aggregation level.

[0222] It should be noted that at least two of the above methods seven to ten can be combined. For example, method seven can be combined with at least one of methods eight, nine, and ten, method eight can be combined with at least one of methods seven, nine, and ten, method nine can be combined with at least one of methods seven, eight, and ten, or method ten can be combined with at least one of methods seven, eight, and nine.

[0223] It can be understood that methods one to five and methods seven to ten are for PDCCHs of different types of search spaces, and there is no conflict between methods one to five and methods seven to ten.

[0224] S303: The network device sends a PDCCH on the first PDCCH resource. Correspondingly, the terminal device monitors the PDCCH on the first PDCCH resource.

[0225] The network device repeatedly sends a PDCCH on the first PDCCH resource and / or sends a PDCCH at a higher aggregation level. Correspondingly, the terminal device monitors the PDCCH with repeated transmission on the first PDCCH resource and / or blindly detects the PDCCH at a higher aggregation level.

[0226] In this embodiment, by expanding the PDCCH transmission resources or using the idle resources to enhance type0 / 0A / 0B / 1 / 1A / 2 / 2A PDCCH, the performance and coverage ability of type0 / 0A / 0B / 1 / 1A / 2 / 2A PDCCH can be improved, thereby increasing the success rate of the terminal device decoding type0 / 0A / 0B / 1 / 1A / 2 / 2A PDCCH. For type3 PDCCH or the PDCCH in the UE dedicated search space, the repetition transmission times of this type of PDCCH can be increased through this solution, making the transmission times greater than or equal to 3 times, or the aggregation level of this type of PDCCH can be increased, or the PDCCH can be enhanced by using different monitoring opportunities of the search space, using CORESET expansion or idle resources, thereby further improving the performance and coverage ability of type3 PDCCH or the PDCCH in the UE dedicated search space. For example, in the NTN scenario, the success rate of the terminal device decoding PDCCH in the edge beam or cell can be increased, and the coverage ability of PDCCH in the NTN scenario can be improved. In the non-NTN scenario, the coverage ability and performance of PDCCH in the cell edge or edge beam can also be improved through this solution, and the success rate of the terminal device decoding PDCCH at the cell edge can be increased.

[0227] In the solution described in S301-S303 above, the case where the network device sends the second information to the terminal device to indicate PDCCH enhancement is taken as an example for illustration. In the following scenarios, the network device may also not indicate PDCCH enhancement to the terminal device through the second information. When the terminal device meets the conditions, it enables PDCCH enhancement, that is, determines the first PDCCH transmission resource, and monitors the repeatedly transmitted PDCCH on the first PDCCH transmission resource, and / or blindly detects the PDCCH at a higher aggregation level. Thus, the signaling overhead can be reduced. In a possible implementation, when the terminal device communicates with the network device through the NTN frequency band, the network device enhances the PDCCH and does not send the second information to the network device. The terminal device determines that it is currently communicating with the network device through the NTN frequency band, determines the first PDCCH transmission resource according to the first information, and monitors the repeatedly transmitted PDCCH on the first PDCCH transmission resource, and / or blindly detects the PDCCH at a higher aggregation level.

[0228] In another implementation, the terminal device has sent third information to the network device. The third information is used to request the network device to enhance the PDCCH, or the third information reports to the network device that the terminal device has the ability to process the enhanced PDCCH. The network device enhances the PDCCH in response to the third information without sending the second information to the terminal device. After sending the third information, the terminal device determines the first PDCCH transmission resource according to the first information, and monitors the repeatedly transmitted PDCCH on the first PDCCH transmission resource, and / or blindly detects the PDCCH at a higher aggregation level. The third information can be reported through Msg1. For example, the network device configures the grouping of PRACH resources in the SIB message. For example, the PRACH resources are divided into 4 groups. If the terminal uses the PRACH resources in the first group, it means that the terminal does not request / report the ability (for PDCCH repetition). If the terminal uses the PRACH resources in the second group to send Msg1, it means that the terminal requests two PDCCH repetitions, or reports the ability to support two PDCCH repetitions. Alternatively, the third information can also be reported through the Msg3 high-layer signaling. For example, when the terminal device sends Msg3, when the LCDI field in the MAC subheader = 34, the subheader can have an additional eLCID field. There are 289 reserved codepoints in this field, and one or more of these codepoints can be used to carry the third information; or directly use one or both of the two "R" bits (reserved bits) in the Msg3 MAC subheader to carry the third information.

[0229] Of course, in these scenarios (the terminal device communicates with the network device through the NTN frequency band and the terminal device has sent the third information to the network device), the network device can also send the second information to the terminal device, which is not limited here.

[0230] Next, the communication device used to implement the above method in the embodiments of the present application will be introduced with reference to the accompanying drawings.

[0231] As Figure 7 shown, it is a possible exemplary block diagram of the communication device involved in the present application. The communication device 700 can correspondingly implement the functions or steps implemented by the terminal device or the network device in the above respective method embodiments. The communication device may include a transceiver module 701 and a processing module 702. Optionally, a storage module may also be included, and the storage module may be used to store instructions (codes or programs) and / or data. The processing module 702 may be coupled to the storage module. For example, the processing module 702 may read the instructions (codes or programs) and / or data in the storage module to implement the corresponding method. The above respective modules may be independently provided or partially or fully integrated.

[0232] It should be understood that the processing module 702 may be a processor or a controller. For example, it may be a general central processing unit (CPU), a general processor, a digital signal processing (DSP), an application specific integrated circuits (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logic blocks, modules and circuits described in connection with the disclosure of the present application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc. The transceiver module 701 is an interface circuit of the device for receiving signals from other devices. For example, when the device is implemented in the form of a chip, the transceiver module 701 is the interface circuit of the chip for receiving signals from other chips or devices, or is the interface circuit of the chip for sending signals to other chips or devices.

[0233] The communication device 700 may be the network device or the terminal device in the above embodiments, or may also be a chip for implementing the functions of the network device or the terminal device in the above embodiments. For example, when the communication device 700 is a network device or a terminal device, the processing module 702 may be a processor, and the transceiver module 701 may be a transceiver, for example. Optionally, the transceiver may include a radio frequency circuit, and the storage unit may be a memory, for example. For example, when the communication device 700 is a chip for implementing the functions of a network device or a terminal device, the processing module 702 may be a processor, and the transceiver module 701 may be an input / output interface, a pin or a circuit, etc. The processing module 702 may execute the computer-executable instructions stored in the storage unit. Optionally, the storage unit is a storage unit within the chip, such as a register, a cache, etc. The storage unit may also be a storage unit outside the chip within the network device, the terminal device or the location management device, such as a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM), etc.

[0234] In some possible embodiments, the communication device 700 can correspondingly implement the behaviors and functions of the terminal device in the above method embodiments. For example, the communication device 700 can be a terminal device or a component (such as a chip or a circuit) applied to the terminal device. The transceiver module 701 can be used to support the communication of the terminal device with other network entities. For example, it can support the communication between the terminal device and Figure 3 the network device shown, or the communication with the location management device. The processing module 702 is used to control and manage the actions of the terminal device. For example, the processing module 802 is used to support the terminal device to execute Figure 3 all operations of the terminal device other than transceiver.

[0235] For example, the transceiver module 701 can be used to execute Figure 3 all the receiving or sending operations performed by the terminal device in the embodiments shown, such as Figure 3 S301, S302, S303, etc. in the embodiments shown, and / or other processes for supporting the technologies described herein. Among them, the processing module 702 is used to execute all operations performed by the terminal device other than the transceiver operations in the embodiments shown, such as other processes for supporting the technologies described herein. Figure 3

[0236] In some embodiments, the transceiver module 701 is used to receive first information, and the first information indicates the configuration information of the physical downlink control channel PDCCH.

[0237] When the condition is met, the transceiver module 701 is used to monitor the PDCCH on the first PDCCH transmission resource according to the first information. The first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing the PDCCH. The enhanced PDCCH includes repeated transmission of the PDCCH and / or increasing the aggregation level of the PDCCH.

[0238] In a possible implementation, meeting the condition includes meeting at least one of the following conditions:

[0239] The transceiver module 701 receives second information, and the second information indicates the enhanced PDCCH;

[0240] The frequency band corresponding to the first information received by the transceiver module 701 is a non-terrestrial network frequency band;

[0241] The transceiver module 701 sends third information, and the third information indicates the enhanced PDCCH.

[0242] ​In a possible implementation, the PDCCH is used to schedule System Information Block SIB1. The processing module 702 is configured to determine a first PDCCH transmission resource according to first information when a condition is met; the second PDCCH transmission resource is a resource configured based on Control Resource Set CORESET0, and / or, the second PDCCH transmission resource is a resource configured based on a type0 PDCCH common search space set.

[0243] In a possible implementation, the first information indicates that the Synchronization Signal Block SSB / CORESET multiplexing mode is 1, the first PDCCH transmission resource includes a third PDCCH transmission resource, the third PDCCH transmission resource corresponds to a first type0 PDCCH monitoring occasion, the second PDCCH transmission resource corresponds to a second type0 PDCCH monitoring occasion, and the first type0 PDCCH monitoring occasion is associated with the second type0 PDCCH monitoring occasion; the first time slot includes the first type0 PDCCH monitoring occasion, and the second time slot includes the second type0 PDCCH monitoring occasion; the first time slot and the second time slot belong to the same radio frame, or, the first time slot and the second time slot respectively belong to two adjacent radio frames. Or the first type0 PDCCH monitoring occasion and the second type0 PDCCH monitoring occasion are scheduled by different SSBs with repeated transmissions.

[0244] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource, the third PDCCH transmission resource is a resource configured based on a first type0 PDCCH common search space set, the second PDCCH transmission resource is a resource configured based on a second type0 PDCCH common search space set, and the first type0 PDCCH common search space set and the second type0 PDCCH common search space set are located in the same time slot.

[0245] In a possible implementation. The first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource, and the second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same CORESET0.

[0246] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same search space set. The third PDCCH transmission resource corresponds to a first PDCCH monitoring occasion, and the second PDCCH transmission resource corresponds to a second PDCCH monitoring occasion. The first PDCCH monitoring occasion and the second PDCCH monitoring occasion belong to the same time slot.

[0247] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources in a fourth PDCCH transmission resource configured based on the same CORESET and the same search space.

[0248] In a possible implementation, the search space set is a type 0 / 0A / 0B / 1 / 1A / 2 / 2A / 3 common search space set, or the search space set is a UE-specific search space set.

[0249] In a possible implementation, the first PDCCH transmission resource includes a third PDCCH transmission resource configured based on a first CORESET and a first search space set, and the second PDCCH transmission resource is configured based on a second CORESSET and a second search space set. The first CORESET is associated with the second CORESET, the first search space set is associated with the second search space set, and the first CORESET is different from the second CORESET.

[0250] In some possible implementation manners, the communication device 700 can correspondingly implement the behaviors and functions of the network device in the above method embodiments. For example, the communication device 700 can be a network device or a component (such as a chip or a circuit) applied to the network device. The network device is, for example, an access network device such as a base station or a TRP, etc. The transceiver module 701 can be used to support the communication between the network device and other network entities, for example, to support the communication between the network device and Figure 3 the terminal device shown. The processing module 702 is used to control and manage the actions of the network device. For example, the processing module 702 is used to support the network device to execute Figure 3 all operations other than transceiver.

[0251] In some embodiments, the transceiver module 701 is configured to send a first piece of information, where the first piece of information indicates configuration information of a physical downlink control channel (PDCCH). When a condition is met, the transceiver module 701 is configured to send a PDCCH on a first PDCCH transmission resource, where the first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing the PDCCH, and the enhanced PDCCH includes repeating the transmission of the PDCCH and / or increasing the aggregation level of the PDCCH.

[0252] In some possible implementation manners, the condition being met includes meeting at least one of the following conditions:

[0253] The elevation angle of the beam for sending the first piece of information is less than a preset angle;

[0254] The transceiver module 701 sends the first piece of information through a non-terrestrial network frequency band;

[0255] The transceiver module 701 receives a third piece of information, where the third piece of information indicates an enhanced PDCCH.

[0256] In some possible implementation manners, the PDCCH is used to schedule a system information block (SIB1), and the second PDCCH transmission resource is a resource configured based on a control resource set (CORESET0), and / or the second PDCCH transmission resource is a resource configured based on a type0 PDCCH common search space set.

[0257] In some possible implementation manners, the first piece of information indicates that the synchronization signal block (SSB) / CORESET multiplexing mode is 1. The first PDCCH transmission resource includes a third PDCCH transmission resource, where the third PDCCH transmission resource corresponds to a first type0 PDCCH monitoring occasion, and the second PDCCH transmission resource corresponds to a second type0 PDCCH monitoring occasion, and the first type0 PDCCH monitoring occasion is associated with the second type0 PDCCH monitoring occasion; the first time slot includes the first type0 PDCCH monitoring occasion, and the second time slot includes the second type0 PDCCH monitoring occasion; the first time slot and the second time slot belong to the same radio frame, or the first time slot and the second time slot respectively belong to two adjacent radio frames. Or the first type0 PDCCH monitoring occasion and the second type0 PDCCH monitoring occasion are scheduled by different SSBs with repeated transmission.

[0258] In some possible embodiments, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The third PDCCH transmission resource is a resource configured based on a first type 0 PDCCH common search space set, the second PDCCH transmission resource is a resource configured based on a second type 0 PDCCH common search space set, and the first type 0 PDCCH common search space set and the second type 0 PDCCH common search space set are in the same time slot.

[0259] In some possible embodiments, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource, and the second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same CORESET0.

[0260] In some possible embodiments, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same search space set. The third PDCCH transmission resource corresponds to a first PDCCH monitoring occasion, the second PDCCH transmission resource corresponds to a second PDCCH monitoring occasion, and the first PDCCH monitoring occasion and the second PDCCH monitoring occasion are in the same time slot.

[0261] In some possible embodiments, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource, and the second PDCCH transmission resource and the third PDCCH transmission resource are resources in a fourth PDCCH transmission resource configured based on the same CORESET and the same search space.

[0262] In some possible embodiments, the search space set is a type 0 / 0A / 0B / 1 / 1A / 2 / 2A / 3 common search space set, or the search space set is a UE-specific search space set.

[0263] In some possible embodiments, the first PDCCH transmission resource includes a third PDCCH transmission resource. The third PDCCH transmission resource is a resource configured based on a first CORESET and a first search space set, the second PDCCH transmission resource is a resource configured based on a second CORESSET and a second search space set, the first CORESET is associated with the second CORESET, the first search space set is associated with the second search space set, and the first CORESET is different from the second CORESET.

[0264] It should be understood that the processing module 702 in the embodiments of the present application may be implemented by a processor or processor-related circuit components, and the transceiver module 701 may be implemented by a transceiver or transceiver-related circuit components.

[0265] As Figure 8 shown, it is a schematic structural diagram of a communication device provided by the present application. Among them, the communication device 800 may be a network device, such as a base station, a TRP, etc., capable of implementing the functions of the network device in the method provided by the embodiments of the present application. Or, the communication device 800 may be a terminal device, capable of implementing the functions of the terminal device in the method provided by the embodiments of the present application. Or, the communication device 800 may also be a device capable of supporting the network device or the terminal device to implement the corresponding functions in the method provided by the embodiments of the present application. Among them, the communication device 800 may be a chip system. In the embodiments of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

[0266] The communication device 800 includes at least one processor 820. The processor 820 may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the present application solution, and is used to implement or support the communication device 800 to implement the functions of the network device or the terminal device in the method provided by the embodiments of the present application. For specific details, please refer to the detailed description in the method examples, which will not be elaborated here.

[0267] The communication device 800 may further include at least one memory 830 for storing program instructions and / or data. The memory 830 is coupled to the processor 820. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, and may be electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. The processor 820 may cooperate with the memory 830. The processor 820 may execute the program instructions and / or data stored in the memory 830, so that the communication device 800 implements the corresponding method. At least one of the at least one memory may be included in the processor 820.

[0268] The communication device 800 may further include a communication interface 810, which uses any device such as a transceiver to communicate with other devices or communication networks, such as RAN, wireless local area networks (WLAN), wired access networks, etc. The communication interface 810 is used to communicate with other devices through a transmission medium, so that the devices in the communication device 800 can communicate with other devices. Exemplarily, when the communication device 800 is a network device, the other device is a terminal device or a location management function; or, when the communication device is a terminal device, the other device is a network device or a location management function. The processor 820 may use the communication interface 810 to send and receive data. The communication interface 810 may specifically be a transceiver.

[0269] In the embodiments of the present application, the specific connection medium between the communication interface 810, the processor 820, and the memory 830 is not limited. In the embodiments of the present application Figure 8 it is shown that the memory 830, the processor 820, and the communication interface 810 are connected through a bus 840. The bus is represented by a thick line in Figure 8 which. The connection manners between other components are only for illustrative purposes and are not to be construed as limiting. The bus may be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 8 only a thick line is used to represent it in which, but it does not mean that there is only one bus or one type of bus.

[0270] In the embodiments of the present application, the processor 820 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0271] The memory 830 can be a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, or can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM), or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory can exist independently and be connected to the processor through a communication line. The memory can also be integrated with the processor.

[0272] Among them, the memory 830 is used to store computer-executable instructions for executing the solution of this application, and is controlled by the processor 820 for execution. The processor 820 is used to execute the computer-executable instructions stored in the memory 830, so as to implement the communication method provided in the above embodiments of this application.

[0273] Optionally, the computer-executable instructions in the embodiments of this application can also be referred to as application code, and the embodiments of this application do not make specific limitations thereon.

[0274] It should be noted that the communication device in the above embodiments can be a terminal device, a circuit, a chip applied to a terminal device, or other combined devices or components with the functions of the above terminal device. When the communication device is a terminal device, the transceiver module can be a transceiver, which can include an antenna, a radio frequency circuit, etc., and the processing module can be a processor, for example: a central processing unit (CPU). When the communication device is a component with the functions of the above terminal device, the transceiver module can be a radio frequency unit, and the processing module can be a processor. When the communication device is a chip system, the communication device can be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a CPU, a network processor (NP), a digital signal processing circuit (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips. The processing module 702 can be the processor of the chip system. The transceiver module 701 or the communication interface can be the input / output interface or interface circuit of the chip system. For example, the interface circuit can be a code / data read / write interface circuit. The interface circuit can be used to receive code instructions (the code instructions are stored in the memory, can be directly read from the memory, or can also be read from the memory through other devices) and transmit them to the processor; the processor can be used to run the code instructions to execute the methods in the above method embodiments. Another example is that the interface circuit can also be a signal transmission interface circuit between the communication processor and the transceiver.

[0275] Exemplarily, the communication device in the above embodiments can be a chip, which includes a logic circuit and an input / output interface, and can also include a memory. Among them, the input / output interface can be used to receive code instructions (the code instructions are stored in the memory, can be directly read from the memory, or can also be read from the memory through other devices) and transmit them to the logic circuit; the logic circuit can be used to run the code instructions to execute the methods in the above method embodiments. Or, the input / output interface can also be a signal transmission interface circuit between the logic circuit and the transceiver.

[0276] Figure 9 Fig. shows a schematic structural diagram of a simplified communication device. For ease of understanding and convenient illustration, Figure 9 in which, the communication device is taken as a base station as an example. The base station can be applied to, for example, Figure 1In the system shown in FIG. 1 or FIG. 2, it can be Figure 1 a network device in FIG. 1 or FIG. 2 to perform the functions of the network device in the above method embodiments.

[0277] The communication device 900 may include a transceiver 910, a memory 921, and a processor 922. The transceiver 910 can be used for the communication device to communicate, such as for sending the above broadcast message, etc. The memory 921 is coupled to the processor 922 and can be used to store the programs and data necessary for the communication device 900 to implement various functions. The processor 922 is configured to support the communication device 900 to execute the corresponding functions in the above method, and the functions can be implemented by calling the programs stored in the memory 921.

[0278] Specifically, the transceiver 910 can be a wireless transceiver, which can be used to support the communication device 900 to receive and send signaling and / or data through the wireless air interface. The transceiver 910 can also be referred to as a transceiver unit or a communication unit. The transceiver 910 may include one or more radio frequency units 912 and one or more antennas 911. Among them, the radio frequency unit such as a remote radio unit (RRU) or an active antenna unit (AAU) can be specifically used for the transmission of radio frequency signals and the conversion between radio frequency signals and baseband signals. The one or more antennas can be specifically used for the radiation and reception of radio frequency signals. Optionally, the transceiver 910 may only include the above radio frequency units. In this case, the communication device 900 may include a transceiver 910, a memory 921, a processor 922, and an antenna.

[0279] The memory 921 and the processor 922 can be integrated into one body or independent of each other. As Figure 9 shown, the memory 921 and the processor 922 can be integrated into the control unit 920 of the communication device 900. Exemplarily, the control unit 920 may include a baseband unit (BBU) of an LTE base station. The baseband unit can also be called a digital unit (DU). Or, the control unit 920 may include a distributed unit (DU) and / or a centralized unit (CU) in a base station under 5G and future radio access technologies. The above control unit 920 may be composed of one or more antenna panels. Among them, multiple antenna panels can jointly support a radio access network of a single access mode (such as an LTE network), and multiple antenna panels can also separately support radio access networks of different access modes (such as an LTE network, a 5G network, or other networks).

[0280] The memory 921 and the processor 922 may serve one or more antenna panels. That is, the memory 921 and the processor 922 may be separately provided on each antenna panel. It is also possible that multiple antenna panels share the same memory 921 and processor 922. In addition, necessary circuits may be provided on each antenna panel. For example, the circuit can be used to realize the coupling of the memory 921 and the processor 922. The transceiver 910, the processor 922, and the memory 921 can be connected through a bus structure and / or other connection media.

[0281] Based on Figure 9 According to the structure shown above, when the communication device 900 needs to send data, the processor 922 can perform baseband processing on the data to be sent and then output a baseband signal to the radio frequency unit. The radio frequency unit performs radio frequency processing on the baseband signal and then sends the radio frequency signal in the form of electromagnetic waves through the antenna. When data is sent to the communication device 900, the radio frequency unit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 922. The processor 922 converts the baseband signal into data and processes the data.

[0282] Based on as Figure 9 According to the structure shown above, the transceiver 9010 can be used to perform the steps previously executed by the transceiver module 701. And / or, the processor 922 can be used to call instructions in the memory 921 to execute the steps previously executed by the processing module 702.

[0283] Figure 10 The figure shows a schematic structural diagram of a simplified terminal device. For the convenience of understanding and illustration, Figure 10 in this case, the terminal device takes a mobile phone as an example. As Figure 10 shown, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input / output device. The processor is mainly used to process communication protocols and communication data, control the vehicle-mounted unit, execute software programs, and process data of software programs, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used to receive data input by the user and output data to the user. It should be noted that some types of devices may not have an input / output device.

[0284] When data needs to be sent, after the processor performs baseband processing on the data to be sent, it outputs a baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to this device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes this data. For ease of explanation, Figure 10 only one memory and one processor are shown. In an actual device product, there may be one or more processors and one or more memories. The memory can also be referred to as a storage medium or a storage device, etc. The memory can be set independently of the processor or integrated with the processor. The embodiments of the present application do not limit this.

[0285] In the embodiments of the present application, the antenna and the radio frequency circuit with transceiver functions can be regarded as the transceiver unit of the device, and the processor with processing functions can be regarded as the processing unit of the device. As Figure 10 shown, the device includes a transceiver unit 1010 and a processing unit 1020. The transceiver unit 1010 can also be referred to as a transceiver, a transceiver machine, a transceiver device, etc. The processing unit 1020 can also be referred to as a processor, a processing single board, a processing module, a processing device, etc. Optionally, the devices in the transceiver unit 1010 for implementing the receiving function can be regarded as the receiving unit, and the devices in the transceiver unit 1010 for implementing the sending function can be regarded as the sending unit, that is, the transceiver unit 1010 includes a receiving unit and a sending unit. The transceiver unit 1010 can sometimes also be referred to as a transceiver machine, a transceiver, or a transceiver circuit, etc. The receiving unit can sometimes also be referred to as a receiver, a receiver, or a receiving circuit, etc. The sending unit can sometimes also be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0286] It should be understood that the transceiver unit 1010 is used to perform the sending operation and the receiving operation on the terminal side in the above method embodiments, and the processing unit 1020 is used to perform other operations on the terminal except the transceiver operation in the above method embodiments.

[0287] When this communication device is a chip-like device or a circuit, the device may include a transceiver unit and a processing unit. Among them, the transceiver unit may be an input / output circuit and / or a communication interface; the processing unit is an integrated processor or a microprocessor or an integrated circuit.

[0288] The embodiments of the present application also provide a computer-readable storage medium, including instructions, which when running on a computer, cause the computer to execute Figure 3 the methods executed by the network device and the terminal device in

[0289] In an embodiment of the present application, a computer program product is further provided, including instructions that, when running on a computer, cause the computer to execute Figure 3 the methods executed by the network device and the terminal device in Figure 3 , or execute the method executed by the aforementioned positioning management device.

[0290] An embodiment of the present application provides a chip system, which includes a processor and may further include a memory for implementing the functions of the network device and the terminal device in the foregoing methods. The chip system may be composed of chips or may include chips and other discrete devices.

[0291] In the method provided by the embodiment of the present application, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in this embodiment are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from a website, a computer, a server, or a data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a digital video disc (DVD)), or a semiconductor medium (such as an SSD), etc.

[0292] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A communication method, characterized in that, the method includes: receiving first information, the first information indicating configuration information of a physical downlink control channel PDCCH; when a condition is satisfied, listening for the PDCCH on a first PDCCH transmission resource according to the first information, the first PDCCH transmission resource including a second PDCCH transmission resource for enhancing the PDCCH, and enhancing the PDCCH including repeating transmission of the PDCCH and / or increasing the aggregation level of the PDCCH.

2. The method according to claim 1, characterized in that, the condition being satisfied includes satisfying at least one of the following conditions: receiving second information, the second information indicating enhancement of the PDCCH; the frequency band for receiving the first information being a non-terrestrial network frequency band; transmitting third information, the third information indicating enhancement of the PDCCH.

3. The method according to claim 1 or 2, characterized in that, the PDCCH is used to schedule a system information block SIB1, and the method further includes: when the condition is satisfied, determining the first PDCCH transmission resource according to the first information; the second PDCCH transmission resource is a resource configured based on a control resource set CORESET0, and / or, the second PDCCH transmission resource is a resource configured based on a type0 PDCCH common search space set.

4. The method according to claim 3, characterized in that, the first information indicates that the synchronization signal block SSB / CORESET multiplexing mode is 1, the first PDCCH transmission resource includes a third PDCCH transmission resource, the third PDCCH transmission resource corresponds to a first type0 PDCCH monitoring occasion, the second PDCCH transmission resource corresponds to a second type0 PDCCH monitoring occasion, and the first type0 PDCCH monitoring occasion is associated with the second type0 PDCCH monitoring occasion; a first time slot includes the first type0 PDCCH monitoring occasion, and a second time slot includes the second type0 PDCCH monitoring occasion; the first time slot and the second time slot belong to the same radio frame, or, the first time slot and the second time slot respectively belong to two adjacent radio frames; or the first type0 PDCCH monitoring occasion and the second type0 PDCCH monitoring occasion are scheduled by different SSBs with repeated transmission.

5. The method according to claim 3, characterized in that, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource, the third PDCCH transmission resource is a resource configured based on a first type0 PDCCH common search space set, the second PDCCH transmission resource is a resource configured based on a second type0 PDCCH common search space set, and the first type0 PDCCH common search space set and the second type0 PDCCH common search space set are located in the same time slot.

6. The method according to claim 3, wherein, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource, and the second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same CORESET0.

7. The method according to claim 1 or 2, wherein, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource, and the second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same search space set. The third PDCCH transmission resource corresponds to a first PDCCH monitoring occasion, and the second PDCCH transmission resource corresponds to a second PDCCH monitoring occasion. The first PDCCH monitoring occasion and the second PDCCH monitoring occasion belong to the same time slot.

8. The method according to claim 1 or 2, wherein, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource, and the second PDCCH transmission resource and the third PDCCH transmission resource are resources in the PDCCH transmission resources configured based on the same CORESET and the same search space.

9. The method according to claim 8, wherein, the search space set is a type 0 / 0A / 0B / 1 / 1A / 2 / 2A / 3 common search space set, or the search space set is a user equipment dedicated search space set.

10. The method according to claim 1 or 2, wherein, the first PDCCH transmission resource includes a third PDCCH transmission resource, and the third PDCCH transmission resource is a resource configured based on a first CORESET and a first search space set. The second PDCCH transmission resource is a resource configured based on a second CORESSET and a second search space set. The first CORESET is associated with the second CORESET, and the first search space set is associated with the second search space set. The first CORESET is different from the second CORESET.

11. A communication method, wherein, the method includes: sending first information, where the first information indicates configuration information of a physical downlink control channel PDCCH; when a condition is satisfied, sending the PDCCH on a first PDCCH transmission resource, where the first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing the PDCCH, and enhancing the PDCCH includes repeating the transmission of the PDCCH and / or increasing the aggregation level of the PDCCH.

12. The method according to claim 11, wherein, the condition being satisfied includes satisfying at least one of the following conditions: the elevation angle of the beam for sending the first information is less than a preset angle; sending the first information through a non-terrestrial network frequency band; Receive third information, where the third information indicates enhancing the PDCCH.

13. The method according to claim 11 or 12, wherein, the PDCCH is used to schedule system information block SIB1, the second PDCCH transmission resource is a resource configured based on control resource set CORESET0, and / or the second PDCCH transmission resource is a resource configured based on type0 PDCCH common search space set.

14. The method according to claim 13, wherein, the first information indicates that the synchronization signal block SSB / CORESET multiplexing mode is 1, the first PDCCH transmission resource includes a third PDCCH transmission resource, the third PDCCH transmission resource corresponds to a first type0 PDCCH monitoring occasion, the second PDCCH transmission resource corresponds to a second type0 PDCCH monitoring occasion, and the first type0 PDCCH monitoring occasion is associated with the second type0 PDCCH monitoring occasion; the first time slot includes the first type0 PDCCH monitoring occasion, and the second time slot includes the second type0 PDCCH monitoring occasion; the first time slot and the second time slot belong to the same radio frame, or the first time slot and the second time slot respectively belong to two adjacent radio frames; or the first type0 PDCCH monitoring occasion and the second type0 PDCCH monitoring occasion are scheduled by different SSBs for repeated transmission.

15. The method according to claim 13, wherein, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource, the third PDCCH transmission resource is a resource configured based on a first type0 PDCCH common search space set, the second PDCCH transmission resource is a resource configured based on a second type0 PDCCH common search space set, and the first type0 PDCCH common search space set and the second type0 PDCCH common search space set are located in the same time slot.

16. The method according to claim 13, wherein, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource, and the second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same CORESET0.

17. The method according to claim 11 or 12, wherein, The first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources configured based on the same search space set. The third PDCCH transmission resource corresponds to a first PDCCH monitoring occasion, and the second PDCCH transmission resource corresponds to a second PDCCH monitoring occasion. The first PDCCH monitoring occasion and the second PDCCH monitoring occasion belong to the same time slot.

18. The method according to claim 11 or 12, wherein, the first PDCCH transmission resource includes a third PDCCH transmission resource associated with the second PDCCH transmission resource. The second PDCCH transmission resource and the third PDCCH transmission resource are resources among the PDCCH transmission resources configured based on the same CORESET and the same search space.

19. The method according to claim 18, wherein, the search space set is a type 0 / 0A / 0B / 1 / 1A / 2 / 2A / 3 common search space set, or the search space set is a user equipment dedicated search space set.

20. The method according to claim 11 or 12, wherein, the first PDCCH transmission resource includes a third PDCCH transmission resource. The third PDCCH transmission resource is a resource configured based on a first CORESET and a first search space set. The second PDCCH transmission resource is a resource configured based on a second CORESSET and a second search space set. The first CORESET is associated with the second CORESET, the first search space set and the second search space set are associated, and the first CORESET is different from the second CORESET.

21. A communication device, wherein, it includes a module for executing the method according to any one of claims 1 to 20.

22. A communication device, wherein, it includes at least one processor, and the at least one processor is used for executing the method according to any one of claims 1 to 20.

23. A readable storage medium, wherein, the storage medium stores a computer program or instruction, and when the computer program or instruction is executed by a communication device, the method according to any one of claims 1 to 20 is implemented.

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