Communication method and communication apparatus

Abstract

Embodiments of the present application provide a communication method and a communication apparatus to improve a coverage capability of a physical downlink control channel (PDCCH). The method comprises: receiving first information, the first information indicating configuration information of a PDCCH. When a condition is satisfied, monitoring of the PDCCH is performed on a first PDCCH transmission resource on the basis of the first information. The first PDCCH transmission resource comprises a second PDCCH transmission resource used for enhancing the PDCCH, and the enhancement of the PDCCH comprises repeatedly transmitting the PDCCH and / or increasing the aggregation level of the PDCCH.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 27, 2023, with application number 202311601838.1 and invention name “Communication Method and Communication Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method and a communication device. Background Art

[0003] Non-terrestrial network (NTN) communications, particularly satellite communications, are being considered for 3GPP standardization discussions due to their wide coverage and strong disaster resilience. NTN can simultaneously cover specific application scenarios alongside terrestrial networks, enhancing terrestrial network coverage. It can also independently serve isolated islands, remote areas (such as the polar regions and oceans), and aerospace equipment. It can also significantly enhance the scalability of 5G networks by providing broadcast or multicast services directly to the network edge or user devices. As a key implementation of NTN, satellite communications are a crucial component of the integrated space-ground network.

[0004] The downlink transmission process includes downlink control information transmission and downlink data transmission. The downlink control channel (physical downlink control channel, PDCCH) carries the control information used to schedule the downlink data shared channel. Therefore, the reliability of downlink data transmission depends on the reliability of PDCCH.

[0005] NTN communication distance is long and the communication link loss is large, so there may be a situation where the link budget does not meet the decoding threshold. Summary of the Invention

[0006] The present application provides a communication method and a communication device for enhancing PDCCH and improving the performance and coverage capability of PDCCH.

[0007] In a first aspect, a communication method is provided. The method is performed by a terminal device, or the method is performed by some components in the terminal device (such as a processor, chip, or chip system), or the method can also be implemented by a logic module or software that can implement all or part of the terminal device functions.

[0008] In the first aspect and its possible implementation, the communication method is described by taking the execution of the terminal device as an example. The method includes: receiving first information, the first information indicating the configuration information of the PDCCH. In other words, the first information indicates the time-frequency resources for transmitting the PDCCH. When the conditions are met, the PDCCH is monitored on the first PDCCH transmission resource according to the first information. In other words, the terminal device monitors the repeatedly transmitted PDCCH on the first PDCCH transmission resource, and / or blindly detects the PDCCH with 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. Enhancing the PDCCH includes repeatedly transmitting the PDCCH and / or increasing the aggregation level of the PDCCH. The second PDCCH transmission resource may include a PDCCH resource of an extended configuration of the network device. The second PDCCH transmission resource may also include an idle PDCCH transmission resource. It should be noted that the first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing the PDCCH, which does not mean that the PDCCH is enhanced only on the second PDCCH transmission resource, but refers to the PDCCH transmission resource added by the network device for the PDCCH to enhance the PDCCH, so that the PDCCH can be transmitted in the form of an enhanced PDCCH on the first PDCCH transmission resource. The added PDCCH transmission resource is relative to the PDCCH transmission resource actually used to transmit the PDCCH without enhancing the PDCCH. When the conditions are met, the PDCCH is enhanced by repeated PDCCH transmission or by increasing the PDCCH aggregation level, thereby improving the performance, coverage and reliability of the PDCCH.

[0009] In one possible implementation, satisfying the condition includes satisfying at least one of the following conditions: receiving second information, receiving the first information corresponding to a frequency band that is a non-terrestrial network frequency band, and transmitting third information. The second information indicates an enhanced PDCCH. The second information may be determined and transmitted by a network device to instruct a terminal device to monitor for repetitively transmitted PDCCHs on a first PDCCH and / or to blindly detect PDCCHs at a higher aggregation level. The frequency band corresponding to the first information received is a non-terrestrial network frequency band, meaning that the terminal device and the network device communicate via a non-terrestrial network frequency band. The third information indicates the enhanced PDCCH, or in other words, the third information is used to request an enhanced PDCCH from the network device. Alternatively, the third information is used to report terminal device capabilities to the network device. Terminal device capabilities include the ability to handle PDCCH enhancements, meaning that the terminal device has the ability to determine first PDCCH transmission resources, monitor repetitively transmitted PDCCHs on first PDCCH transmission resources, and / or blindly detect PDCCHs at a higher aggregation level. Therefore, enhancing the PDCCH when downlink performance is poor can improve the success rate of PDCCH decoding by the terminal device and enhance downlink reliability.

[0010] In one possible implementation, the PDCCH is used to schedule system information block (SIB) 1. That is, the transmission resources of the PDCCH are defined by the control resource set (CORESET) 0 and the type 0 PDCCH common search space set. The method also includes: when a condition is met, determining the first PDCCH transmission resource according to the first information; 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 type 0 PDCCH common search space set. In other words, the second PDCCH transmission resource is a resource extended by CORESET0. For example, when the condition is met, the network device configures CORESET0 with more resources for the PDCCH. For example, the CORESET0 includes more resources in the frequency domain, and / or the CORESET includes more symbols in the time domain. Alternatively, in one possible scenario, the resource size of CORESET0 is larger than the PDCCH payload size, that is, the resource size occupied by the PDCCH payload is smaller than the size of the resources configured in CORSET0. There are idle resources in the PDCCH transmission resources, and the network device uses these idle resources to enhance the PDCCH. Alternatively, the second PDCCH transmission resources are resources extended by the type0 PDCCH common search space set. For example, when the conditions are met, the network device configures more type0 PDCCH common search space sets for the PDCCH, increasing the monitoring opportunities for type0 PDCCH. Thus, the network device can configure resources for the PDCCH to enhance the transmission of the PDCCH, thereby improving the coverage capability and performance of the PDCCH.

[0011] In one possible implementation, the first information indicates that the synchronization signal block (SSB) / CORESET multiplexing mode is 1. The SSB / CORESET multiplexing mode is 1. According to the new radio (NR) standard, the terminal device needs to monitor the type 0 PDCCH in the type 0 PDCCH monitoring opportunities in two time slots within an even frame or an odd frame. The first PDCCH transmission resource includes a third PDCCH transmission resource, the third PDCCH transmission resource corresponds to the first type 0 PDCCH monitoring opportunity, the second PDCCH transmission resource corresponds to the second type 0 PDCCH monitoring opportunity, and 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 in different time slots within the same radio frame. Therefore, enhancing the PDCCH on the configured PDCCH transmission resource can effectively utilize resources and improve the coverage capability and performance of the PDCCH. Alternatively, the first time slot and the second time slot belong to two adjacent wireless frames respectively. That is, the network device enhances the PDCCH based on the type0 PDCCH monitoring opportunity in the time slots in the odd frames and the even frames. Or the first type0 PDCCH monitoring opportunity and the second type0 PDCCH monitoring opportunity are scheduled for different SSBs for repeated transmission. The different SSBs for repeated transmission are SSBs that schedule the same SIB1, and the different SSBs for repeated transmission correspond to the same SSB index. Thereby, the coverage capability and performance of type0 PDCCH are improved. Accordingly, the terminal device monitors the repeatedly transmitted PDCCH on the associated type0 PDCCH monitoring opportunity, and / or blindly detects the PDCCH on the first PDCCH transmission resource with a higher aggregation level, thereby improving the success rate of decoding the PDCCH.

[0012] In one 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 located in the same time slot. The configuration parameters of the type0 PDCCH common search space set include the number of search space sets per time slot (number of search space sets per slot), which can be used to configure more type0 PDCCH common search space sets in a time slot to configure transmission resources for enhancing the PDCCH, thereby improving the coverage capability and performance of the PDCCH. Accordingly, the terminal device associates the first type0 PDCCH common search space set with the second type0 PDCCH common search space set, monitors the repeatedly transmitted PDCCH at the corresponding monitoring opportunity, and / or blindly detects the PDCCH on the first PDCCH transmission resource with a higher aggregation level, thereby improving the success rate of decoding the PDCCH.

[0013] In one 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. In one implementation, the network device configures more resources on CORESET0 to configure transmission resources for enhancing the PDCCH, that is, the network device configures CORESET0 with more resources. For example, in another implementation, the network device may not increase the resource size of CORESET0, and the network device may enhance the PDCCH using idle resources, that is, the resource size configured for CORESET0 is larger than the resource size actually occupied by the PDCCH. The network device may utilize unused idle resources and add the idle resources to the first PDCCH transmission resource used to transmit the PDCCH, thereby enhancing the PDCCH on the first PDCCH transmission resource, which can improve resource utilization and improve the coverage capability and performance of the PDCCH. Accordingly, 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 at a higher aggregation level on the first PDCCH transmission resource, thereby improving the success rate of decoding the PDCCH.

[0014] In one 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 opportunity, the second PDCCH transmission resource corresponds to the second PDCCH monitoring opportunity, and the first PDCCH monitoring opportunity and the second PDCCH monitoring opportunity belong to the same time slot. That is, the network device can configure N monitoring opportunities in a time slot based on one search space and associate N monitoring opportunities. The network device repeatedly transmits the PDCCH on the PDCCH transmission resource corresponding to the N monitoring opportunities (i.e., the first PDCCH transmission resource), and / or transmits the PDCCH at a higher aggregation level, thereby improving the coverage capability and performance of the PDCCH. Accordingly, the terminal device associates the N monitoring opportunities, monitors the repeatedly transmitted PDCCH on the N monitoring opportunities, 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 public search space set, or the search space set is a user-specific search space set.

[0015] In one 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 in PDCCH transmission resources configured based on the same CORESET and the same search space. In other words, 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 public search space set, or the search space set can be a user equipment (UE) dedicated search space set.

[0016] In one possible implementation, the network device may configure a CORESET with more resources for enhancing the PDCCH. For example, a CORESET with more resources has more resource blocks in the frequency domain and / or more symbols in the time domain. The CORESET with more resources is relative to the CORESET configured without enhancing the PDCCH. Thus, 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 another possible implementation, the network device may not configure a CORESET with more resources for enhancing the PDCCH, but when there are idle resources in the PDCCH transmission resources, the idle resources are used to enhance the PDCCH. 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 in the case of not enhancing the PDCCH. However, the fourth PDCCH transmission resource configured in the case of not enhancing the PDCCH is not actually used to transmit the PDCCH, but there are idle resources. In the case of enhancing the PDCCH, the idle resources (second PDCCH transmission resources) are used to transmit the PDCCH. Accordingly, the terminal device associates the second PDCCH transmission resource and the third PDCCH transmission resource in the first PDCCH transmission resource, listens to 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.

[0018] In one 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. That is, the network device can be associated with different CORESETs. Optionally, it can also be associated with 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, candidate PDCCHs for enhancing PDCCHs can also be associated. Thus, the configuration flexibility of the first PDCCH transmission resource can be improved.

[0019] The second aspect provides a communication method. The 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, the communication method is executed by some components in the network device (such as a processor, a chip or a chip system, etc.), or the communication method can also be implemented by a logic module or software that can realize all or part of the network device functions (for example, DU or RU, etc.). The method includes: sending first information, the first information indicates the configuration information of the physical downlink control channel PDCCH; when the conditions are met, sending PDCCH on the first PDCCH transmission resource, the first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing the PDCCH, and the enhanced PDCCH includes repeatedly transmitting the PDCCH and / or increasing the aggregation level of the PDCCH.

[0020] In one possible implementation, satisfying the condition includes satisfying at least one of the following conditions: the elevation angle of the beam used to send the first information is less than a preset angle, the first information is sent via a non-terrestrial network frequency band, and the third information is received. The fact that the elevation angle of the beam used to send the first information is less than the preset angle indicates that the terminal device is located in an edge area of ​​coverage of the network device, and thus the coverage capability and performance of the PDCCH can be improved by enhancing the PDCCH, thereby improving the success rate of the terminal device decoding the PDCCH. The first information is sent via a non-terrestrial network frequency band, that is, the network device and the terminal device communicate via the NTN frequency band. Due to the long distance, the NTN may have poor downlink performance, so enhancing the PDCCH can improve the coverage capability 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 an 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.

[0021] In a possible implementation, the PDCCH is used to schedule SIB1, 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 a type 0 PDCCH common search space set.

[0022] In one 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, and 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 for different SSBs for repeated transmission.

[0023] In one 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 located in the same time slot.

[0024] 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.

[0025] In one 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 opportunity, the second PDCCH transmission resource corresponds to a second PDCCH monitoring opportunity, and the first PDCCH monitoring opportunity and the second PDCCH monitoring opportunity belong to the same time slot.

[0026] In one 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 in PDCCH transmission resources configured based on the same CORESET and the same search space.

[0027] 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.

[0028] In one 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.

[0029] In a third aspect, embodiments of the present application provide a communication device having the functionality to implement the behaviors described in the method example of the first aspect. The beneficial effects can be found in the description of the first aspect and are not further described here. The communication device may be the terminal device described in the first aspect, or the communication device may be a device capable of supporting the terminal device described in the first aspect to implement the functionality required by the method provided in the first aspect, such as a chip or chip system.

[0030] In one possible design, the communication device includes corresponding means or modules for performing the method of the first aspect. For example, the 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 perform the corresponding functions in the above-mentioned method example of the first aspect. For details, please refer to the detailed description in the method example, which is not repeated here.

[0031] In a fourth aspect, an embodiment of the present application provides a communication device having the function of implementing the behavior in the method example of the second aspect above. The beneficial effects can be found in the description of the second aspect and are not repeated here. The communication device can be the network device in the second aspect, or the communication device can be a device that can support the network device in the second aspect to implement the functions required by the method provided in the second aspect, such as a chip or chip system.

[0032] In one possible design, the communication device includes corresponding means or modules for performing the method of the second aspect. For example, the 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 perform the corresponding functions in the above-mentioned method example of the second aspect. For details, please refer to the detailed description in the method example, which is not repeated here.

[0033] In a fifth aspect, an embodiment of the present application provides a communication device, which may be the communication device in the third or fourth aspect of the above-mentioned embodiment, or a chip or chip system provided in the communication device in the third or fourth aspect. The communication device includes a communication interface and a processor, and optionally, further includes a memory. The memory is used to store computer programs, instructions, or data, and the processor is coupled to the memory and the communication interface. When the processor reads the computer program, instructions, or data, the communication device executes the method performed by the terminal device or network device in the above-mentioned method embodiment.

[0034] In a sixth aspect, an embodiment of the present application provides a communication device, comprising at least one processor and, optionally, a memory, wherein the at least one processor is coupled to the memory. The at least one processor is configured to execute the method described in the first aspect or the second aspect.

[0035] In a seventh aspect, an embodiment of the present application provides a chip system, which includes a processor and may also include a memory and / or a communication interface, for implementing the method described in the first aspect or the second aspect. In one possible implementation, the chip system also includes a memory for storing program instructions and / or data. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0036] In an eighth aspect, an embodiment of the present application provides a communication system, comprising 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. 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.

[0037] In a ninth aspect, the present application provides a computer-readable storage medium storing a computer program. When the computer program is executed, the method of any one of the first to second aspects described above is implemented.

[0038] In a tenth aspect, a computer program product is provided, comprising: a computer program code, wherein when the computer program code is run, the method in any one of the first to second aspects is executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application;

[0040] FIG2a is a schematic diagram of an NTN network architecture provided by this application;

[0041] FIG2 b is a schematic diagram of another NTN network architecture provided by this application;

[0042] FIG2c is a schematic diagram of another NTN network architecture provided by this application;

[0043] FIG3 is a flow chart of a communication method provided by the present application;

[0044] FIG4 is a schematic diagram of a first PDCCH resource configuration provided by this application;

[0045] FIG5 is a schematic diagram of another first PDCCH resource configuration provided by the present application;

[0046] FIG6 is a schematic diagram of another first PDCCH resource configuration provided by the present application;

[0047] FIG7 is a possible exemplary block diagram of a communication device involved in this application;

[0048] FIG8 is a schematic structural diagram of a communication device provided by the present application;

[0049] FIG9 is a schematic structural diagram of a simplified communication device provided by the present application;

[0050] FIG10 is a schematic structural diagram of a simplified terminal device provided in this application. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0052] In the description of this application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "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 can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more. Words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not limit them to be necessarily different.

[0053] In this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0054] The technical solutions of the embodiments of the present 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, fifth generation (5G) system or new radio (NR) and future communication systems, etc., without limitation here. Among them, the embodiments of the present application can also be applied to various mobile communication scenarios based on the above-mentioned various communication systems, such as point-to-point transmission between base stations and UEs, point-to-point transmission between UEs, multi-hop / relay transmission between base stations and UEs, DC (Dual Connectivity) or multi-connection scenarios of multiple base stations and UEs.

[0055] Figure 1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. As shown in Figure 1 , the communication system includes a radio access network 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The radio access network 100 may include at least one radio access network device (such as 110a and 110b in Figure 1 ) and at least one terminal (such as 120a-120j in Figure 1 ). The terminal is wirelessly connected to the radio access network device, and the radio access network device is wirelessly or wiredly connected to the core network. The core network device and the radio access network device may be independent, distinct physical devices, or the core network device's functions and the radio access network device's logical functions may be integrated into the same physical device, or a single physical device may integrate some of the core network device's functions and some of the radio access network device's functions. Terminals and radio access network devices may be interconnected via wired or wireless connections. Figure 1 is merely a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in Figure 1 .

[0056] The wireless access network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in the fifth generation (5G) 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 centralized unit (CU) or a distributed unit (DU). The wireless access network device can be a macro base station (such as 110a in Figure 1), a micro base station or an indoor station (such as 110b in Figure 1), a relay node or a donor node, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device.

[0057] In the embodiments of the present application, the apparatus for implementing the function of a network device may be a network device; or it may be a device capable of supporting the network device in implementing the function, such as a chip system, which may be installed in the network device. In the technical solutions provided in the embodiments of the present application, the technical solutions provided in the embodiments of the present application are described by assuming that the apparatus for implementing the function of a network device is a network device, and that the network device is a base station.

[0058] A terminal may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used 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 wearable, smart transportation, smart city, etc. A terminal may be a mobile phone, tablet computer, computer with wireless transceiver function, wearable device, vehicle, drone, helicopter, airplane, ship, robot, robotic arm, smart home appliance, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal. In the embodiments of the present application, the device for realizing the function of the terminal may be a terminal; it may also be a device that can support the terminal to realize the function, such as a chip system, which may be installed in the terminal. In the embodiments of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices. In the technical solutions provided in the embodiments of the present application, the device for implementing the functions of the terminal is a terminal, and the terminal is a UE as an example to describe the technical solutions provided in the embodiments of the present application.

[0059] Base stations and terminals can be fixed or mobile. They can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; on water; or in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0060] The roles of base stations and terminals can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile base station. To terminals 120j accessing the wireless access network 100 via 120i, terminal 120i is a base station. However, to base station 110a, 120i is a terminal, meaning that communication between 110a and 120i occurs via a wireless air interface protocol. Of course, communication between 110a and 120i can also occur via a base station-to-base station interface protocol. In this case, 120i is also a base station relative to 110a. Therefore, base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be referred to as communication devices with base station functionality, while 120a-120j in Figure 1 can be referred to as communication devices with terminal functionality.

[0061] Communication between base stations and terminals, between base stations, and between terminals can be carried out through authorized spectrum, unauthorized spectrum, or both; communication can be carried out through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0062] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem that includes the base station functions. The control subsystem that includes the base station functions here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or modem) in the terminal, or by a device that includes the terminal functions.

[0063] In this application, a base station sends downlink signals or downlink information to a terminal, and the downlink information is carried on a downlink channel; the terminal sends uplink signals or uplink information to the base station, and the uplink information is carried on an 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 with which the terminal has established a wireless connection is called the serving cell of the terminal. When the terminal communicates with the serving cell, it will also be subject to interference from signals in neighboring cells.

[0064] In the embodiments of the present application, PDCCH is only used as an example of a downlink control channel. In different systems and different scenarios, the control channel may have different names, and the embodiments of the present application do not limit this.

[0065] As shown in Figures 2a-2c, Figures 2a-2c are schematic diagrams of three NTN network architectures provided in this application. Ground terminal equipment accesses the network through an air interface (the air interface can be various types of air interfaces, such as 4G / 5G air interfaces, or air interfaces in future networks). As shown in Figure 2a, a base station can be deployed on the ground and connected to a ground station that communicates with a satellite. As shown in Figure 2b, a base station can also be deployed on a satellite. The satellite is connected to the ground station via a wireless link. The ground station and the ground base station are connected to the core network via a wired or wireless connection. A wireless link can exist between satellites. As shown in Figure 2c, the satellite only has a transparent forwarding function (i.e., the corresponding base station is deployed on the ground), then only transparent forwarding is implemented between satellites. If the base station or part of the base station function is deployed on the satellite, then the signaling interaction and user data transmission between base stations can be completed between satellites.

[0066] Some network elements and their interfaces in Figures 2a-2c are described as follows:

[0067] Ground station: responsible for forwarding signaling and business data between satellite base stations and core network.

[0068] Air interface: The wireless link between the terminal and the base station.

[0069] Xn interface: The interface between base stations, mainly used for signaling interaction such as switching.

[0070] NG interface: The interface between the base station and the core network, which mainly exchanges NAS and other signaling of the core network, as well as user business data.

[0071] This application can be applied to 4G, 5G, or future defined communication systems, involving terminal devices and base stations, ground stations, and other wireless access network elements, performing uplink and downlink data communications 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.

[0072] In order to make the embodiments of the present application clearer, some concepts or contents in the embodiments of the present application are briefly introduced here.

[0073] 1. Control resource set (COREST)

[0074] CORESET may indicate the frequency domain resource location of the control channel and the symbol length occupied in the time domain, wherein the symbol may be an orthogonal frequency division multiplexing (OFDM) symbol.

[0075] In the initial access phase, the first CORESET used for communication is generally CORESET0. CORESET0 occupies a continuous PRB resource in the frequency domain. CORESET0 is used to place the PDCCH payload for scheduling system messages such as SIB1. After the terminal decodes the SIB system message, it can obtain other COREST configurations through RRC configuration, which can be a non-contiguous frequency domain PRB resource defined by a bitmap.

[0076] Due to the large bandwidth of NR, the concept of BWP (bandwidth part) is introduced. The network side can allocate BWPs of different sizes according to different services. Based on the concept of BWP, CORESET is introduced. The network side will configure multiple CORESTs and SSs in the BWP, and then determine a time-frequency domain resource for different purposes by pairing a COREST with an SS. For example, the time-frequency domain resources determined by a pair of COREST SSs can be used to check the downlink control information (DCI)-format 0_0 / 1_0, and then the time-frequency domain resources determined by another pair of COREST and SSs can be used to check the DCI-format 0_1 / 1_1.

[0077] COREST corresponds to a set of continuous or non-contiguous PRBs (physical resource blocks) in the frequency domain. The time domain resource size occupied by CORESET is 1 to 3 OFDM symbols, and the starting position in the time domain can be flexibly configured. The resource size granularity of COREST is CCE (channel control element channel control unit). Each CCE occupies six consecutive REGs (contiguous 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.

[0078] The network side configures CORESETs. In each cell, a maximum of 12 CORESETs (0 to 11) can be configured. The number of CORESETs in each DL BWP configured for the UE by the serving cell cannot exceed 4. The CORESET index can only be 1 to 11. Index 0 is already occupied by CORESET0.

[0079] 2. Search space set (SS set)

[0080] The search space set may also be referred to as a search space set or a search space. The search space may indicate the time domain location information of the control channel. The control channel mentioned in the embodiments of the present application refers to the Physical Downlink Control Channel (PDCCH).

[0081] In the embodiment of the present application, there are two types of search space sets, namely a common search space set (CSS set) and a user-specific search space set (USS set). In the embodiment of the present application, the common search space set is also written as a CSS set, and the user-specific search space set is written as a USS set. The cells involved in the embodiment of the present application may include a primary cell and a 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 user-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 user-specific search space set. In some cases, the secondary cell may only be configured with a user-specific search space set, which is not limited here.

[0082] When a network device configures a search space set for a terminal device, it also configures a search space set identifier for each search space set. The search space set identifier is also called the search space set index. When the search space set is a public search space set, the search space set refers to the public search space set identifier. When the search space set is a user-specific search space set, the search space set refers to the user-specific search space set identifier.

[0083] The cell involved in the embodiments of the present application may refer to, for example, a cell covered by a base station. A cell is an area that provides wireless communication services to users and is the basic component unit of a wireless network. For example, NR is a cell resource that adds NR through the MML commands ADD NRCELL and ADD NRDUCELL. The network-side device may configure multiple cells for the terminal-side device, one of which is used to initiate initial access. This cell is called the primary cell, and the other cells are secondary cells. All cells together constitute the coverage of the entire wireless network.

[0084] 3. Aggregation Level (AL)

[0085] The aggregation level refers to the number of control channel elements (CCEs) contained in a PDCCH. Currently, the PDCCH aggregation levels include AL1, AL2, AL4, AL8, and AL16. When a UE blindly detects a PDCCH based on a PDCCH candidate position configured by the network equipment, it must perform blind detection for each possible PDCCH aggregation level.

[0086] 4. Blind detection (BD)

[0087] Depending on its purpose and content, downlink control information (DCI) is classified into many formats, such as random access radio network temporary identifier (RA-RNTI) and paging access radio network temporary identifier (P-RNTI). The PDCCH information of different users is distinguished by their corresponding cell radio network temporary identifier (C-RNTI). That is, the cyclic redundancy check (CRC) of the DCI is masked by the C-RNTI. The base station configures the user equipment (UE) with a set of candidate PDCCHs (PDCCH candidates) to monitor for DCI through higher-layer signaling (e.g., radio resource control (RRC) signaling). Since the UE does not know in advance which PDCCH candidate(s) the base station will send DCI on, but knows what downlink control information it currently expects to receive based on the base station configuration information, the UE must attempt to decode each candidate PDCCH in the set based on the configuration information. Specifically, the UE performs a CRC check on the information on the PDCCH candidate using the corresponding radio network temporary identifier (RNTI). If the CRC check succeeds, the user knows that the DCI information has been successfully decoded. The UE's attempt to decode each candidate PDCCH to determine whether it has received the corresponding DCI is called blind detection. Among them, the set including the candidate PDCCH is the search space set, that is, the search space set includes the candidate PDCCH, and the candidate PDCCH is located in the corresponding CORESET. Therefore, the search space set identifier will be associated with the index number of the CORESET where the candidate PDCCH included in the search space set is 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 (control-channel element, CCE) index of the candidate PDCCH of the search space set in the CORESET.

[0088] 5. Monitoring time

[0089] The monitoring opportunity is also called the PDCCH monitoring occasion (PDCCH MO). The PDCCH monitoring occasion of a search space set (SS set) in a time slot is jointly determined by the configuration information of the SS set and the CORESET associated with it. Specifically, a PDCCH MO is composed of a monitoring start symbol and a monitoring duration. The monitoring start symbol (the monitoring start symbol is also referred to as the start symbol in some places in the embodiments of the present application) is configuration information of a search space set (the configuration information of the search space set is also referred to as SS set configuration information in some places in the embodiments of the present application), and the monitoring duration (the monitoring duration is also referred to as duration in some places in the embodiments of the present application) is configuration information of a control resource set. The SS set configuration information includes a 14-bit bitmap parameter (monitoringSymbolsWithinSlot, which is used to indicate the monitoring starting OFDM symbol position of an SS set containing this parameter within a slot for the UE). Each bit corresponds one-to-one to an orthogonal frequency division multiplexing (OFDM) symbol (OFDM symbol, OS) within a time slot, and is used to indicate the starting symbol for monitoring of this SS set within a time slot. For example, assuming that monitoringSymbolsWithinSlot = 10000100000000, it means that monitoring of this SS set needs to start at the first OFDM symbol and the sixth OFDM symbol in a time slot (i.e., the monitoring starting symbol is the first OFDM symbol and the sixth OFDM symbol in a time slot). Assuming that this SS set is associated with a control resource set (CORESET) with a duration of three OFDM symbols, the PDCCH monitoring timings for this SS set are PDCCH MO1 and PDCCH MO2, as shown in Figure 3. PDCCH MO1 occupies symbols 0, 1, and 2, and PDCCH MO2 occupies symbols 5, 6, and 7. A CORESET is a concept with a frequency domain width (in RBs) and a time domain duration (in OFDM symbols). When an SS set is associated with a CORESET, the PDCCH MO corresponding to the SS set can be determined.Therefore, monitoringSymbolsWithinSlot=10000100000000 can also be described as: one search space set has two PDCCH MO start symbols in one time slot, namely time domain symbol 0 and time domain symbol 5. The search space set is associated with a CORESET with a time domain duration of 3 symbols, that is, the two PDCCH MO duration is 3 symbols.

[0090] 6. PDCCH repeated transmission

[0091] In the NR Rel-17 discussion, the following definition is given for PDCCH retransmission: the coding / rate matching operation is based on the retransmission of one PDCCH, and the retransmission of the same coded bits for other PDCCHs. Each retransmission uses the same aggregation level (AL) or the same number of CCEs, and retransmits the same coded bits and the same DCI payload information (the DCI bit content is the same).

[0092] It is understandable that the reliability of DCI transmission can be improved by using a multi-station (i.e., multiple transmission and reception points (TRP)) joint transmission mechanism. Specifically, for the same DCI information bit (source), after the coded bit is formed by the above-mentioned encoding method, it is sent by multiple TRPs on different time-frequency resources. The UE can receive multiple coded bits on the above-mentioned time-frequency resources respectively, and then perform a joint analysis operation to obtain the DCI information bit (source). For example, channel estimation is performed on the above-mentioned time-frequency resources respectively and the received signal is demodulated to obtain the likelihood value (soft information) for merging. The above operation can be equivalently understood as improving the signal-to-noise ratio (SNR) of the transmission, thereby improving reliability.

[0093] NTN communication distances are long, and communication link losses are high. Furthermore, considering factors such as penetration loss through buildings, bridges, and elevated roads, as well as power flux density limitations, the PDCCH link budget may not meet the decoding threshold. Therefore, further enhancements to the PDCCH channel are necessary to ensure PDCCH performance in NTN scenarios.

[0094] As shown in Figure 3, Figure 3 is a flow chart of a communication method provided by the present application. This embodiment can be applied in satellite communication scenarios, that is, the network equipment in this embodiment is deployed on a satellite to improve the coverage and performance of PDCCH in NTN scenarios. This embodiment can also be applied in terrestrial communication scenarios, for example, it can be used to enhance the PDCCH coverage and performance at the cell edge, that is, the network equipment in this embodiment is deployed on the ground. This embodiment includes the following steps:

[0095] S301: A network device sends first information indicating configuration information of a PDCCH. Correspondingly, a terminal device receives the first information.

[0096] 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. The search space set indicates the starting OFDM symbol (hereinafter referred to as the OFDM symbol) of the resources occupied by the PDCCH transmission in the time domain, the aggregation level of the PDCCH candidates contained in the search space set, the number of PDCCH candidates of each aggregation level, the monitoring period of the PDCCH candidates, and at least one of the information of the CORESET associated with the search space set. In the NR standard, each search space set is associated with at most one CORESET, and a 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 monitoring position of the PDCCH. Therefore, the terminal device can determine the time-frequency resource position for transmitting the PDCCH based on the CORESET and the search space, and then monitor the PDCCH at the corresponding time-frequency resource position.

[0097] In this embodiment, the first information may be an information element (IE) or field indicating configuration information of the PDCCH, or may be an instruction or message carrying configuration information indicating the PDCCH. For example, the first information may be a master information block (MIB) message, a SIB1 message, or other message, and the other message may be, for example, a newly defined message for carrying configuration information of the PDCCH. For another example, the first information may be radio resource control (RRC) signaling or other signaling, and the other signaling may be, for example, a newly defined signaling for carrying configuration information of the PDCCH. For example, the first information may be the PDCCH-configSIB1 field in the MIB message, or the ControlResourceSet element, serachSpaceZero element, searchSpaceOtherSystemInformation element, ra-SearchSpace element, pagingSearchSpace element, searchSpaceSIB1 element in the signaling PDCCH-ConfigCommon, the SearchSpace element, ControlResourceSet element or other elements in the signaling PDCCH-Config, and other elements may be newly defined elements for indicating the configuration information of the PDCCH.

[0098] The following describes how to configure a CORESET. Regarding CORESET configuration, the NR standard stipulates that a maximum of 12 CORESETs (0 to 11) can be configured in each cell. The number of CORESETs in each DL BWP configured by the serving cell for a UE does not exceed 4. Furthermore, the CORESET index ranges from 1 to 11, with index 0 already occupied by CORESET0.

[0099] CORESET0 is a CORESET dedicated to type 0 CSS sets and is used for RMSI (SIB1) scheduling. The resource indication method of CORESET0 is derived from the upper 4 bits of the PDCCH-configSIB1 field in the SSB→MIB message. By reading these 4 bits and looking up the table in TS38.213, the number of frequency-domain continuous RBs, the number of time-domain symbols, the SSB / COREST0 multiplexing mode, and the frequency-domain physical resource block (PRB) offset parameters occupied by CORESET0 can be determined.

[0100] Except for CORESET0, the configuration of other CORESETs is derived from the 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). Among them, frequency domain resources (frequencyDomainResources): defines the frequency domain resource size of CORESET, 45 bits, each bit represents 6 PRBs, starting from PRB0, the highest bit represents the lowest frequency in the configured BWP, the index (index) is in ascending order from bottom to top, and the bits belonging to COREST must be set to 1. Duration: The number of consecutive symbols in the time domain of CORESET, with a value of 1 to 3.

[0101] NR SS sets include CSS sets and USS sets. CSS sets include type 0 CSS sets, type 0A CSS sets, type 0B CSS sets, type 1 CSS sets, type 1A CSS sets, type 2 CSS sets, type 2A CSS sets, and type 3 CSS sets. CSS sets are primarily used for access and cell handover, as well as for control information related to BCCH, paging, and RAR. The following describes how to configure different types of SS sets.

[0102] For type0 CSS set, there are three configuration methods. 1. The configuration information of type0 CSS set is located in the lower 4 bits of the parameter PDCCH_ConfigSIB1 (a total of 8 bits) 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 downlink synchronization during initial access of the terminal and the PDCCH resources used before the terminal obtains the system message (decodes SIB1). 2. The configuration information of type0 CSS set is located in the searchSpaceZero information element of the high-level parameter PDCCH-ConfigCommon of the RRC signaling. After the terminal device successfully decodes the SIB1 message, it can obtain the reconfiguration of the type0 CSS set resources through RRC configuration, that is, obtain the high-level parameter PDCCH-ConfigCommon→searchSpaceZero, and also look up the table TS38.213 based on this parameter to obtain the corresponding updated configuration of the type0 CSS set. 3. The configuration information for the type 0 CSS set is located in the SearchSpace information element in the searchSpaceSIB1 of the higher-level parameter PDCCH-ConfigCommon in RRC signaling. The SearchSpace information element configures the PDCCH search space (including the aggregation level and number of PDCCH candidates, the starting symbol position for PDCCH monitoring, the monitoring slot period, and the offset) through multiple parameters in RRC signaling.

[0103] Other types of CSS sets (type0A / 1 / 1A / 2 / 2A / 3 CSS sets) other than type0 CSS set must be configured through RRC parameters after the terminal device decodes SIB1. The signaling process is PDCCH-ConfigCommon→commonSearchSpaceList→SearchSpacec.

[0104] For the type 3 common search space set (type 3 CSS set), its configuration method belongs to the UE-specific RRC signaling, PDCCH-Config→SearchSpace (type Common).

[0105] The UE-specific search space set (USS set) also needs to be configured through RRC signaling after RRC takes effect, PDCCH-Config→SearchSpace (type UE-specific).

[0106] For different types of PDCCHs, the messages carrying the first information are different. For example, the first information indicates configuration information for type0-PDCCH (PDCCH used to schedule SIB1), and the first information is carried in a master information block (MIB) message. For another example, the first information indicates configuration information for type0A-PDCCH, type0B-PDCCH, type1-PDCCH, type1A-PDCCH, type2-PDCCH, type2A-PDCCH, type3-PDCCH, etc., and the first information is carried in RRC signaling.

[0107] Type 0 PDCCH configuration information includes CORESET0 and type 0 CSS set. CORESET0 and type 0 CSS set are indicated by PDCCH-ConfigSIB1 (8-bit field) in the MIB message. The terminal device determines the configuration of CORESET0 and type 0 CSS set based on PDCCH-ConfigSIB1. The resource indication method of CORESET0 is derived from the upper 4 bits of the PDCCH-configSIB1 field in the SSB→MIB message. The type 0 CSS set is derived from the lower 4 bits of the PDCCH-configSIB1 field in the SSB→MIB message. The terminal device determines the configuration of the type0 CSS set according to the lower 4 bits of PDCCH-ConfigSIB1, the SSB / CORESET multiplexing mode, the frequency band, etc., such as the SS index of the type0 CSS set, the number of CSS sets in the monitoring time slot, and the starting symbol of the CSS set in the time slot, etc., and the terminal device determines the time domain position (system frame number (SFN) and the time slot index (slot index) in the frame) of the PDCCH candidate in the type0 CSS set monitored in the time domain according to the parameters in the table.

[0108] S302: The network device sends second information, where the second information indicates an enhanced PDCCH. Correspondingly, the terminal device receives the second information.

[0109] The second information indicates an enhanced PDCCH. The network device enhances the PDCCH and sends the second information to the terminal device to instruct the terminal device to monitor and process the enhanced PDCCH. This step is optional and is indicated by a dotted line in FIG3 .

[0110] It should be noted that there is no ordering of steps S301 and S302. For example, S301 may be performed first and then S302. For another example, S302 may be performed first and then S301. For another example, S301 and S302 may be performed simultaneously. The simultaneous execution of S301 and S302 may occur, for example, when the first information and the second information are carried in the same message, or when the first information is a message or signaling and the second information is an element or field within the first information.

[0111] The network device can enhance the PDCCH when conditions are met. 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 PDCCH coverage capability. The network device enhances the PDCCH when at least one of the following conditions is met:

[0112] 1. Network devices communicate with terminal devices using the NTN frequency band. In an NTN scenario, network devices are deployed on satellites, and the two devices can communicate using the NTN frequency band. The NTN frequency band is a satellite-specific frequency band, such as the n255 or n256 band, or other frequency bands defined in the future for NTN communications.

[0113] 2. The elevation angle of the beam used by the network device to communicate 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. For example, in the NTN scenario, the topology and relative position of each cell or beam under the satellite are known to the network device, so the network device can determine the elevation angle of the beam cell center to the network device based on the topology and relative position of the cell or beam. The elevation angle of the beam or cell center to the network device is less than the preset angle, indicating 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.

[0114] 3. The network device receives third information from the terminal device. The third information indicates enhanced PDCCH. In other words, the third information is used to request the network device to enhance the PDCCH. In other words, the third information is used to notify the network device that the terminal device expects the network device to enhance the PDCCH. Alternatively, the third information is used to notify the network device that the terminal device has the ability to process 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 to the network device when the measurement confirms that the downlink channel signal quality is poor. For example, the terminal device receives the SSB and measures the reference signal receiving power (RSRP) of the downlink synchronization signal. If the RSRP measurement value is less than the RSRP threshold, the terminal device sends the third information to the network device. Alternatively, the network device may send the third information to the network device when it has the ability to process PDCCH enhancement. The third information is, for example, a terminal capability report of the terminal device, to notify the network device that it has the ability to process PDCCH enhancement, for example, the terminal device can receive repeated PDCCH transmissions and perform combined processing. Optionally, when the third information is a terminal capability report of the terminal device, the way in which the terminal device sends the third information can be: the network device groups the physical random access channel (PRACH) resources in the SIB / RRC message, such as grouping the preamble or grouping the PRACH occasion (RO). Part of the grouped PRACH resources are associated with the repeated transmission of PDCCH in the common search space set. The terminal device detects the downlink RSRP, and when it is less than the RSRP threshold, the terminal device selects the PRACH resources in the PRACH resources that are associated with the repeated transmission of PDCCH in the common search space set to send message 1 (msg1), that is, sends 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.

[0115] The network device determines that the conditions for enhancing the PDCCH are met, and 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 may send second information to the terminal device, the second information instructing the network device to enhance the PDCCH. Thus, the terminal device can determine the first PDCCH transmission resource of the PDCCH based on the first information and the second information, and monitor the enhanced PDCCH on the first PDCCH transmission resource.

[0116] In this embodiment, the first PDCCH transmission resource includes a second PDCCH transmission resource. The second PDCCH transmission resource is a transmission resource for enhancing the PDCCH. Optionally, the second PDCCH transmission resource can be interpreted as a time-frequency resource added for transmitting the PDCCH to enhance the PDCCH. The second PDCCH transmission resource can be all transmission resources added to enhance the PDCCH. The second PDCCH transmission resource can also be a portion of the transmission resources added to enhance the PDCCH.

[0117] In one 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 conditions are not met, that is, when the PDCCH is not enhanced. In other words, 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. For example, when the PDCCH is not enhanced, the size of the fourth PDCCH transmission resource configured by the network device is 48 resource blocks (RBs), and 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 for enhancing 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 can be 144 RBs, or can be smaller than 144 RBs, such as 24 RBs, 48 ​​RBs, or 96 RBs, etc., and is not limited here. It should be understood that the first PDCCH transmission resource, the second PDCCH transmission resource, the fourth PDCCH transmission resource, and the difference between the first PDCCH transmission resource and the second PDCCH transmission resource are only examples and should not be construed as limiting the present application.

[0118] In another possible implementation, when the conditions are met, the network device enhances the PDCCH but does not expand 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 idle PDCCH resources to enhance the PDCCH. In this case, the size of the first PDCCH transmission resource is the same as the size of the fourth PDCCH transmission resource. In other words, in the case of enhancing the PDCCH, the first PDCCH transmission resource configured by the network device is the same as the fourth PDCCH transmission resource configured in the case of not enhancing the PDCCH. That is, when the conditions are 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 resources to enhance the PDCCH. In this case, the second PDCCH transmission resource can be an idle resource in the fourth PDCCH transmission resource. Idle resources are resources in the fourth PDCCH transmission resources that are not used or occupied. For example, the size of the fourth PDCCH transmission resource is 48 RBs, and the PDCCH payload actually occupies 24 of them. The remaining 24 RBs are not used to send the PDCCH payload, which means that there are 24 RBs of idle resources in the fourth PDCCH transmission resource. In this case, the network device can use the 24 RBs of idle resources to enhance the PDCCH without configuring new PDCCH transmission resources to enhance the PDCCH.

[0119] In another implementation, the network device may also utilize different PDCCH monitoring opportunities to enhance the PDCCH without expanding the total PDCCH transmission resources. For example, the network device may configure multiple PDCCH monitoring opportunities for the PDCCH according to a standard protocol. When conditions are met, the network device may associate the multiple PDCCH monitoring opportunities and utilize the PDCCH transmission resources corresponding to the multiple PDCCH monitoring opportunities to enhance the PDCCH.

[0120] The first PDCCH transmission resources also include third PDCCH transmission resources. The third PDCCH transmission resources do not overlap with the second PDCCH transmission resources.

[0121] In this embodiment, enhancing PDCCH includes but is not limited to the following methods:

[0122] 1. Repeated transmission of PDCCH, or increasing the number of repeated transmissions of PDCCH. For example, a single transmission of PDCCH is enhanced to repeated transmission of PDCCH. For another example, repeated transmission of PDCCH twice is enhanced to repeated transmission three times, four times or more times. The network device may repeatedly transmit PDCCH in a frequency division multiplexing manner, or may transmit PDCCH in a time division multiplexing manner, which is not limited here. The network device may 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 network device can repeatedly transmit PDCCH on the associated candidate PDCCH.

[0123] 2. Increase 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 increasing the success rate of the terminal device decoding the PDCCH. For example, 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 can use the first PDCCH transmission resource as a resource pool and send the PDCCH at a higher aggregation level on the first PDCCH transmission resource.

[0124] 3. Repeated PDCCH transmission and increased PDCCH aggregation level: This means that repeated PDCCH transmission and increased PDCCH aggregation level are possible.

[0125] The network device determines the enhanced PDCCH when the conditions are met, and sends a second information to the terminal device, where the second information indicates the enhanced PDCCH. Accordingly, the terminal device determines that the PDCCH will be enhanced based on the second information, determines the first PDCCH transmission resource based on 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 PDCCH at a higher aggregation level may refer to blindly detecting PDCCH from the maximum aggregation level. Alternatively, blindly detecting PDCCH at a higher aggregation level may refer to the terminal setting blindly detecting PDCCH 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 when the terminal device starts blindly detecting PDCCH when the PDCCH is not enhanced. For example, blindly detecting PDCCH starts from aggregation level 4 when the PDCCH is not enhanced, and starts blindly detecting PDCCH from aggregation level 8 / 16 / 20 / 24 / 32 / 64 when the PDCCH is enhanced, without the need to blindly detect PDCCH at aggregation level 4. Alternatively, in a possible implementation, the second information indicates an aggregation level used by the network device, and the terminal device blindly detects the PDCCH based on the aggregation level.

[0126] In one possible scenario, the network device configures more PDCCH transmission resources (the first PDCCH transmission resource is greater than the fourth PDCCH transmission resource) to enhance the PDCCH, but the first information remains unchanged compared to the first information without enhancing the PDCCH. The second information can instruct the terminal device to interpret the PDCCH transmission resources (i.e., the first PDCCH transmission resource) including more resources according to the first information, and associate the second PDCCH transmission resources and the third PDCCH transmission resources in the first PDCCH transmission resource to monitor the repeatedly transmitted PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource, and / or blindly detect the PDCCH at a higher aggregation level on the first PDCCH transmission resource. In another possible scenario, the network device does not configure more PDCCH transmission resources (the first PDCCH transmission resource is the same as the fourth PDCCH transmission resource), and the first information is unchanged compared to the first information when the PDCCH is not enhanced, then the second information can instruct the terminal device to associate the second PDCCH transmission resource and the third PDCCH transmission resource in the first PDCCH transmission resource, so as to monitor the repeatedly transmitted PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource, and / or blindly detect the PDCCH at a higher aggregation level on the first PDCCH transmission resource. In another possible scenario, the network device configures more PDCCH transmission resources (the first PDCCH transmission resource is greater than the fourth PDCCH transmission resource) to enhance the PDCCH, and the first information indicates the first PDCCH transmission resource, then the second information can instruct the terminal device to associate the second PDCCH transmission resource and the third PDCCH transmission resource in the first PDCCH transmission resource, so as to monitor the repeatedly transmitted PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource, and / or blindly detect the PDCCH at a higher aggregation level on the first PDCCH transmission resource.

[0127] Optionally, associating the second PDCCH transmission resource and the third PDCCH transmission resource in the first PDCCH transmission resource also includes associating the corresponding candidate PDCCHs in the second PDCCH transmission resource and the third PDCCH transmission resource. The network device can repeatedly send the PDCCH on the associated candidate PDCCH, and the terminal device listens to the repeatedly sent PDCCH on the associated candidate PDCCH. The second PDCCH transmission resource may include at least one candidate PDCCH, and the third PDCCH transmission resource may include at least one candidate PDCCH. For example, candidate PDCCHs with the same index in the second PDCCH transmission resource and the third PDCCH transmission resource can be associated, or candidate PDCCHs with the same aggregation level in the second PDCCH transmission resource and the third PDCCH transmission resource can be associated.

[0128] In this embodiment, there are multiple ways to implement the second information. The second information can be a specific value, a cell, or a message. The second information can be carried in an MIB message or in RRC signaling. Alternatively, the second information can also be carried in DCI. The second information can be a newly set cell in the MIB message / RRC signaling / DCI, or it can be carried in an idle or reserved field in the MIB message / RRC signaling / DCI. The second information can include at least one of the following parameters:

[0129] 1. PDCCH enhancement switch. The PDCCH enhancement switch is used to indicate whether the PDCCH is enhanced. The size of the PDCCH enhancement switch can be 1 bit, thereby reducing the overhead of the second information. For example, the value of the PDCCH enhancement switch is 0, indicating that the PDCCH is enhanced, and the value of the PDCCH enhancement switch is 1, indicating that the PDCCH is not enhanced. Alternatively, the value of the PDCCH enhancement switch is 1, indicating that the PDCCH is enhanced, and the value of the PDCCH enhancement switch is 0, indicating that the PDCCH is not enhanced. Of course, the size of the PDCCH enhancement switch can also be 2 bits, 3 bits or larger, and there is no limitation here. In another implementation, the PDCCH enhancement switch can be a signal element. If the network device sends the signal element, it indicates that the PDCCH is enhanced, and if it does not send the signal element, it indicates that the PDCCH is not enhanced. Alternatively, if the network device sends the signal element, it indicates that the PDCCH is not enhanced, and if it does not send the signal element, 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 based on the first information, and monitors the PDCCH on the fourth PDCCH transmission resource. When the PDCCH enhancement switch indicates enhancement of the PDCCH, the terminal device is triggered to determine the first PDCCH transmission resource according to the first information and monitor the PDCCH on the first PDCCH transmission resource. Optionally, when the PDCCH enhancement switch indicates enhancement of the PDCCH, the terminal device is triggered to associate resources in the first PDCCH transmission resource with candidate PDCCHs, for example, to associate the second PDCCH transmission resource with the third PDCCH transmission resource, and to 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 PDCCH on the associated candidate PDCCH, and / or blindly detects the PDCCH at a higher aggregation level.

[0130] 2. Number of PDCCH retransmissions. Alternatively, it can also be called a PDCCH retransmission factor. The number of PDCCH retransmissions indicates how many times the PDCCH is retransmitted, so that the second information can accurately indicate the number of retransmissions. In one possible implementation, the size of the PDCCH retransmission number can be 1 bit. For example, when the value of the PDCCH retransmission number is 0, it indicates that the PDCCH is not retransmitted; when the value of the PDCCH retransmission number is 1, it indicates that the PDCCH is retransmitted 2 times, 3 times, 4 times or more times. Alternatively, when the value of the PDCCH retransmission number is 1, it indicates that the PDCCH is not retransmitted; when the value of the PDCCH retransmission number is 0, it indicates that the PDCCH is retransmitted 2 times, 3 times, 4 times or more times. In another possible implementation, the size of the PDCCH retransmission number 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 twice; when the value of the PDCCH retransmission count is 10, it indicates that the PDCCH is retransmitted twice; when the value of the PDCCH retransmission count is 11, it indicates that the PDCCH is retransmitted four times. It can be understood that the value of the PDCCH retransmission count and the number of PDCCH retransmissions indicated by the value of the PDCCH retransmission count are examples and should not be understood as limitations on the present application. For example, a PDCCH retransmission count of 11 can also be used to indicate that the PDCCH is not retransmitted, or a PDCCH retransmission count of 10 indicates that the PDCCH is retransmitted four times, and so on. Examples are not given here one by one. Of course, the size of the PDCCH retransmission count can also be 3 bits, 4 bits, or more bits, which is not limited here. When the value of the number of PDCCH repetition transmissions indicates that the PDCCH is retransmitted more than 2 times, that is, when the network device is instructed to enhance the PDCCH, the terminal device is triggered 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 number of PDCCH repetition transmissions.

[0131] 3. PDCCH aggregation level. The PDCCH aggregation level may indicate whether the aggregation level of the transmitted PDCCH is increased. Alternatively, the PDCCH aggregation level may indicate which aggregation level the network device has adopted to enhance the PDCCH. In one possible implementation, the size of the PDCCH aggregation level may be 1 bit. For example, when the value of the PDCCH aggregation level is 0, it indicates that the aggregation level of the PDCCH has not been increased; when the value of the PDCCH aggregation level is 1, it indicates that the network device adopts a higher PDCCH aggregation level to transmit the PDCCH. Alternatively, when the value of the PDCCH aggregation level is 1, it indicates that the aggregation level of the PDCCH has not been increased; when the value of the PDCCH aggregation level is 0, it indicates that the network device adopts a higher PDCCH aggregation level to transmit the PDCCH. In another possible implementation, the size of the PDCCH aggregation level transmission may be 2 bits. For example, when the value of the PDCCH aggregation level is 00, it indicates that the PDCCH aggregation level 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 values ​​of the PDCCH aggregation level and the PDCCH aggregation levels indicated by the PDCCH aggregation level values ​​are examples and should not be construed as limitations on the present application. For example, a PDCCH aggregation level value of 11 can also be used to indicate that the PDCCH aggregation level is not increased, or that the PDCCH aggregation level is 64, or a PDCCH aggregation level value of 00 indicates that the PDCCH aggregation level is 8, and so on. Examples are not given here one by one. 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 aggregation level of the PDCCH, that is, when the network device is instructed to enhance the PDCCH, the terminal device is triggered 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 aggregation level of the PDCCH, 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.

[0132] 4. Associated CORESET. The associated CORESET indicates at least two associated CORESETs, and further, the search space sets corresponding to the at least two associated CORESETs are associated with each other. In other words, at least two CORESETs are associated, and the search space sets associated with the at least two CORESETs are associated with each other. Optionally, the second information includes the associated CORESET and the associated search space set, and the associated search space set is the search space set 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 set. Optionally, the second information includes the associated CORESET and the associated search space set, as well as the candidate PDCCHs associated in the associated search space set. For example, if the aggregation levels and numbers of the PDCCH candidates in the associated multiple search space sets are different, the second information may further indicate the candidate PDCCHs associated in the associated search space set. The associated search space sets may be search space sets of the same type or search space sets of different types. Thus, when enhancing the PDCCH, the network device can improve the flexibility of configuring the first PDCCH transmission resource. The terminal device can determine the first PDCCH transmission resource based on 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 set.

[0133] 5. Offset value. The offset value can be a symbol offset value, a time slot offset value, an interval duration, etc. The offset value indicates the time domain offset of the second PDCCH transmission resource relative to the third PDCCH transmission resource.

[0134] In this embodiment, the network device can enhance the PDCCH of 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, and type3 CSS set. The network device can also enhance the PDCCH of the USS set, such as increasing the number of repeated transmissions of the PDCCH of the USS set, such as when the number of repeated transmissions of the PDCCH of the USS set is greater than or equal to 3 times. It can be seen from the description of S301 that different types of search space sets and different types of CORESETs are configured differently. Therefore, for PDCCHs of different types of search space sets, the way in which the network device configures the first PDCCH transmission resources, the way in which the network device sends the second information, and the way in which the terminal device determines the first PDCCH transmission resources are different.

[0135] The following describes the enhancement methods of PDCCH in type0 CSS set and the enhancement methods of PDCCH in other types of search spaces (search spaces other than type0 CSS set, such as 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.).

[0136] 1. Enhancement of PDCCH in type0 CSS set (hereinafter referred to as type0 PDCCH, which is used to schedule SIB1)

[0137] The type of CORESET used for type0 CSS set is CORESET0 (i.e., CORESET with index 0). Type0 CSS set and CORESET0 jointly define the transmission resources of the candidate PDCCH of type0 CSS set. S301 describes the resource configuration method of type0 PDCCH, that is, the upper four bits of the parameter PDCCH-ConfigSIB1 in the MIB carry the configuration information of CORESET0, and the lower four bits carry the configuration information of 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 (hereinafter sometimes referred to as symbols) based on the upper four bits of PDCCH-ConfigSIB1. The terminal device determines the SS index of type0 CSS set, the number of CSS sets in the monitoring time slot, and the starting OFDM symbol of the SS set in the slot based on the lower four bits of PDCCH-ConfigSIB1.

[0138] For type 0 PDCCH, when conditions are met, the network device can configure the first PDCCH transmission resource to enhance the type 0 PDCCH in multiple ways. Correspondingly, the terminal device can determine the first PDCCH transmission resource in multiple ways. The following PDCCH enhancement methods 1 to 5 are the enhancement methods for type 0 PDCCH.

[0139] Method 1: Enhance PDCCH based on the associated type 0 PDCCH monitoring opportunity

[0140] The NR standard stipulates that the SSB / CORESET multiplexing mode is 1, and the terminal device is configured to monitor type0 PDCCH in two time slots, and the two time slots include associated type0 PDCCH monitoring opportunities. The associated type0 PDCCH monitoring opportunity, for example, includes a first type0 PDCCH monitoring opportunity and a second type0 PDCCH monitoring opportunity. The first type0 PDCCH monitoring opportunity and the second type0 PDCCH monitoring opportunity belong to two different time slots respectively. The terminal device needs to monitor type0 PDCCH in the first type0 PDCCH monitoring opportunity and the second type0 PDCCH monitoring opportunity. The two time slots can be two adjacent time slots, such as time slot n0 and time slot n0+1. The two time slots can also be two non-adjacent time slots, such as time slot n0 and time slot n0+4, or time slot n0 and time slot n0+8, etc. The NR standard does not specify that the associated type0 PDCCH monitoring opportunity is used to repeatedly send type0 PDCCH, that is, the associated type0 PDCCH monitoring opportunity is not used to enhance type0 PDCCH.

[0141] In this method, the network device enhances the type0 PDCCH based on the associated type0 PDCCH monitoring opportunity. For example, the network device repeatedly sends the type0 PDCCH at the associated type0 PDCCH monitoring opportunity. And / or, the network device sends the PDCCH at a higher aggregation level on the resources corresponding to the associated type0 PDCCH monitoring opportunity. Specifically, the first PDCCH transmission resource includes the resource corresponding to the associated type0 PDCCH monitoring opportunity. 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 opportunity, and the second PDCCH transmission resource is the resource corresponding to the second type0 PDCCH monitoring opportunity. The network device enhances the 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 repeatedly send the type0 PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource. Alternatively, the network device sends the type0 PDCCH at a higher aggregation level on the first PDCCH transmission resource. Alternatively, the network device may increase the aggregation level of the type 0 PDCCH and repeatedly transmit the type 0 PDCCH on the first PDCCH transmission resource.

[0142] The network device sends first information and second information to the terminal device. The first information includes, for example, PDCCH-ConfigSIB1, so that the terminal device can determine the configuration information of CORESET0 and type0 CSS set according to the first information, and the SSB / CORESET multiplexing mode is 1, thereby determining the associated type0 PDCCH monitoring opportunity. In this method, the second information indicates an enhanced PDCCH based on the associated type0 PDCCH monitoring opportunity. Furthermore, the terminal device responds to the second information, monitors the repeatedly transmitted type0 PDCCH at the associated type0 PDCCH monitoring opportunity and merges it, and / or blindly detects the type0 PDCCH candidate at a higher aggregation level.

[0143] For example, as shown in Figure 4. In Figure 4, it 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, and 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 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 determines type0 PDCCH MO1 of slot 10 and type0 PDCCH MO2 of slot 11 based on the first information, and determines type0 PDCCH MO1 and type0 PDCCH MO2 for type0 PDCCH enhancement based on the second information, thereby monitoring the repeatedly transmitted type0 PDCCH on type0 PDCCH MO1 and type0 PDCCH MO2, and merging the repeatedly transmitted type0 PDCCH.

[0144] In this method, the second information can be a PDCCH enhancement switch, and the terminal device can determine that the network device enables PDCCH enhancement based on the second information, so that the terminal monitors the repeatedly transmitted type0 PDCCH at the associated type0 PDCCH monitoring opportunity and merges it, and / or blindly detects the type0 PDCCH candidate at a higher aggregation level. Alternatively, the second information can also be the number of PDCCH repetitions, and the terminal device can determine that the network device repeatedly transmits the type0 PDCCH at the associated type0 PDCCH monitoring opportunity and the number of repetitions based on the second information. For example, the number of PDCCH repetitions indicates that the number of type0 PDCCH repetitions is 2, so that the terminal device monitors the type0 PDCCH transmitted twice at the associated type0 PDCCH monitoring opportunity and merges it according to the number of PDCCH repetitions. Alternatively, the second information can also be the PDCCH aggregation level, so that the terminal device can blindly detect the type0 PDCCH candidate at the aggregation level indicated by the second information, thereby improving the blind detection efficiency. Alternatively, the second information includes at least two of the PDCCH enhancement switch, the number of PDCCH repetitions, and the PDCCH aggregation level. The PDCCH enhancement switch, the number of PDCCH repetition transmissions and the PDCCH aggregation level can be found in the above description, so they will not be repeated here.

[0145] Method 2: Enhance PDCCH based on the search space set within the time slot

[0146] When the PDCCH is not enhanced, the terminal device may configure a fourth PDCCH transmission resource for the PDCCH. When the PDCCH is enhanced, the terminal device may configure a first PDCCH transmission resource for the PDCCH, and send first information and second information to the terminal device to indicate the first PDCCH transmission resource, and indicate that the first PDCCH transmission resource is used to enhance the PDCCH. The first PDCCH transmission resource is greater than the fourth PDCCH transmission resource. In other words, compared to not enhancing the PDCCH, when the PDCCH is enhanced, the network device configures more transmission resources for the PDCCH. In other words, the network device extends the PDCCH transmission resources to enhance the PDCCH. In other words, the network device reconfigures the PDCCH transmission resources for the PDCCH. In this manner, the network device may extend the PDCCH transmission resources based on the type0 CSS set. For example, the network device configures N type0 CSS sets in 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 N is not greater than the number of symbols in 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, for example, include a first type0 PDCCH common search space set and a second type0 PDCCH common search space set. The first PDCCH transmission resource includes a second PDCCH transmission resource and a third PDCCH transmission resource, the third PDCCH transmission resource is a resource configured based on the first type0 PDCCH common search space set, and the second PDCCH transmission resource is a resource configured based on the second type0 PDCCH common search space set. In other words, the network device reconfigures the number of type0 CSS sets in the time slot to configure the first PDCCH transmission resource, and repeatedly transmits the PDCCH on the first PDCCH transmission resource, and / or transmits the PDCCH at a higher aggregation level.

[0147] When the PDCCH is not enhanced, the terminal device queries the configuration parameter table of the first type0 CSS set (e.g., TS38.213 Tables 13-11 to 13-15A) based on the first information (e.g., including the lower four bits of PDCCH-ConfigSIB1) to determine the configuration of the type0 CSS set. For example, the configuration parameter table of the first type0 CSS set is shown in Table 1. It will be understood that only a row in TS38.213 Tables 13-11 to 13-15A is used here as an example.

[0148] Table 1. Configuration parameters for the first type0 CSS set

[0149] In one possible implementation, when enhancing 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 configuration parameter table of the second type0 CSS set may include a larger number of search space sets in the number of search space sets per slot parameter, that is, each time slot includes more 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 and 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, N search spaces are included in the 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 will be understood that the values ​​of the search space sets and starting symbol indexes in the number of search space sets per slot in Table 2 are for illustration only. For example, the value of number of search space sets per slot can also be 3, 4, 5, 6, or even larger. The starting symbol index can also be any symbol index that is different in the time domain, and the type 0 PDCCH monitoring opportunities corresponding to the starting symbol index do not overlap. Table 2 lists only one row; in practice, Table 2 may have more rows.

[0150] Table 2. Configuration parameters for the second type0 CSS set

[0151] It should be noted that the configuration parameter table of the second type0 CSS set can be a newly introduced table. Alternatively, the configuration parameter table of the second type0 CSS set can also be obtained by configuring the reserved row parameters (number of search space sets per slot to configure more search space sets, first symbol index to configure more starting symbols, etc.) of the existing type0 CSS set configuration parameter table, without limitation here.

[0152] In another implementation, the terminal device may not deploy the configuration parameter table of the second type0 CSS set, but instead obtain the configuration parameters of the type0 CSS set according to Table 1 in accordance with the first information, 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 can be preset values, or can be calculated according to a preset algorithm, or N is the value indicated by the second information (the number of PDCCH repeated transmissions), which is not limited here.

[0153] Each time slot includes N search space sets, and each time slot corresponds to N PDCCH monitoring opportunities. The terminal device monitors the repeatedly transmitted PDCCH at the N PDCCH monitoring opportunities, or blindly detects the PDCCH monitored at the N PDCCH monitoring opportunities with a higher aggregation level.

[0154] 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 based on the search space set within the time slot, and the PDCCH is enhanced based on the type0 PDCCH monitoring opportunity associated between time slots. In this case, the first PDCCH transmission resource includes the transmission resources corresponding to 2N search space sets. For example, as shown in Figure 5, Figure 5 takes two search space sets in a time slot as an example. Through PDCCH enhancement, the first PDCCH transmission resource includes PDCCH transmission resource 1 in slot 10 (resources corresponding to the first type0 CSS set) and PDCCH transmission resource 2 (resources corresponding to the second type0 CSS set), as well as PDCCH transmission resource 3 in slot 10 (resources corresponding to the first type0 CSS set) and PDCCH transmission resource 4 (resources corresponding to the second type0 CSS set). The PDCCH can be transmitted 4 times on PDCCH transmission resources 1-4. Of course, the PDCCH transmission resources within a time slot may be used as a resource pool to send PDCCHs at a higher aggregation level, and PDCCHs at a higher aggregation level may be repeatedly transmitted between time slots. This is not limited here.

[0155] In this method, the second information can be a PDCCH enhancement switch, and the terminal device can determine that the network device enables PDCCH enhancement based on the second information, so that the terminal monitors the repeatedly transmitted PDCCH at N PDCCH monitoring opportunities within the time slot and merges them, or blindly detects the PDCCH candidate at a higher aggregation level. Alternatively, the second information can also be the number of PDCCH repetitions N, and the terminal device can determine that the network device repeatedly transmits PDCCH at N PDCCH monitoring opportunities within the time slot based on the second information, so that the terminal device monitors the type0 PDCCH transmitted N times at the PDCCH monitoring opportunities corresponding to the N search spaces according to the number of PDCCH repetitions N and merges them. Alternatively, the second information includes at least two of the PDCCH enhancement switch, the number of PDCCH repetitions and the PDCCH aggregation level. For the PDCCH enhancement switch, the number of PDCCH repetitions and the PDCCH aggregation level, please refer to the relevant description above, so they will not be repeated here.

[0156] Method 3: Enhance PDCCH based on inter-frame search space set

[0157] SSB / CORESET multiplexing mode 1, the NR standard stipulates that the terminal device monitors the PDCCH on the type0 PDCCH monitoring opportunity in the odd frame or the even frame of each radio frame. In this mode, the network device can configure the type0 CSS set monitoring opportunity and the corresponding PDCCH transmission resources in two time slots in each frame of the radio frame, and the network device sends the second information to the terminal device. The network device associates the type0 PDCCH monitoring opportunity in the odd frame with the type0 PDCCH monitoring opportunity in the even frame, that is, the first PDCCH transmission resource includes the transmission resource corresponding to the type0 PDCCH monitoring opportunity in the adjacent odd frame and the even frame, the type0 PDCCH monitoring opportunity of one frame in the adjacent odd frame and the even frame corresponds to the second PDCCH transmission resource, and the other frame corresponds to the third PDCCH transmission resource. The network device repeatedly transmits the PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource, and / or sends the PDCCH at a higher aggregation level on the first PDCCH transmission resource. Accordingly, the terminal device monitors the repeatedly transmitted PDCCH in adjacent radio frames in response to the second information, and / or blindly detects the PDCCH at a higher aggregation level.

[0158] In this method, the second information may include at least one of a PDCCH enhancement switch, a PDCCH repetition number, and a PDCCH aggregation level. The PDCCH enhancement switch, the PDCCH repetition number, and the PDCCH aggregation level can be found in the above description and will not be described again here.

[0159] Method 4: Enhanced PDCCH based on CORESET (extended CORESET0 resource size)

[0160] When the PDCCH is not enhanced, the terminal device may configure a fourth PDCCH transmission resource for the PDCCH. When the PDCCH is enhanced, the terminal device may configure a first PDCCH transmission resource for the PDCCH and send first information and second information to the terminal device to indicate the first PDCCH transmission resource and to indicate that the first PDCCH transmission resource is used for the enhanced PDCCH. The first PDCCH transmission resource is greater than the fourth PDCCH transmission resource. In other words, compared to when the PDCCH is not enhanced, when the PDCCH is enhanced, the network device configures more transmission resources for the PDCCH. In other words, the network device expands the PDCCH transmission resources to enhance the PDCCH. In other words, 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 CORESET0. In other words, the network device configures enhanced PDCCH transmission resources based on CORESET0. For example, the network device configures more resource blocks in the frequency domain, or more symbols in the time domain, or both in the frequency domain and in the time domain to expand the resource size of CORESET0. In other words, the network device reconfigures CORESET0 to configure the first PDCCH transmission resource, and repeatedly transmits the PDCCH on the first PDCCH transmission resource, and / or transmits the PDCCH at a higher aggregation level.

[0161] When the PDCCH is not enhanced, the terminal device queries the configuration parameter table of the first type 0 CSS set (e.g., TS38.213 Table 13-11 to Table 13-15A) based on the first information (e.g., including the lower four bits of PDCCH-ConfigSIB1) to determine the configuration of the type 0 CSS set. For example, the configuration parameter table of the first type 0 CSS set is shown in Table 1. It will be understood that only a row in TS38.213 Table 13-1 to Table 13-10A is used here as an example.

[0162] When the PDCCH is not enhanced, the terminal device determines the configuration of the first CORESET0 by looking up the upper 4 bits of the parameter PDCCH-ConfigSIB1. For example, the first CORESET0 is shown in Table 3. It should be understood that the parameters in the first CORESET0 are for illustration only and should not be construed as limiting the present application.

[0163] Table 3. Configuration parameters of the first CORESET0

[0164] When enhancing the PDCCH, the terminal device responds to the second information and determines the configuration of the second CORESET0 by looking up the table according to the upper 4 bits of the parameter PDCCH-ConfigSIB1. For example, as shown in Table 4.

[0165] Table 4. Configuration parameters of the second CORESET0

[0166] Alternatively, as shown in Table 5.

[0167] Table 5. Configuration parameters of the second CORESET0

[0168] Alternatively, as shown in Table 6.

[0169] Table 6. Configuration parameters of the second CORESET0

[0170] That is, it is possible to expand only the frequency domain resources of CORESET0 (Table 4), expand only the number of consecutive symbols in the time domain of CORESET0 (Table 5), or expand both the frequency domain resources of CORESET0 and the number of consecutive symbols in the time domain of CORESET0 (Table 6). It is understood that the parameter values ​​in the second CORESET0 shown in Tables 4-6 are only for illustration and only represent the CORESET0 resource expansion method and should not be understood as limiting the present application. In addition, Tables 4-6 only list one row, and there may be more rows in Tables 4-6. It should be noted that this fourth method is applicable to SSB / CORESET multiplexing modes 1, 2, and 3.

[0171] It should be noted that the configuration parameter table of the second CORESET0 may be a newly introduced table. Alternatively, the configuration parameter table of the second CORESET0 may be obtained by configuring the reserved rows of the configuration parameter table of the existing CORESET0 (configuring a larger number of RBs, configuring a larger number of symbols, etc.), which is not limited here.

[0172] In another implementation, the terminal device may not deploy the second CORESET0 configuration parameter table, but may query Table 3 according to the first information to obtain the configuration parameters of CORESET0, and then, in response to the second information, determine a larger number of RBs and / or a larger number of symbols based on the configuration parameters of CORESET0 obtained in Table 3. The extended number of RBs and / or the extended number of symbols may be a preset value, calculated according to a preset algorithm, or indicated by the second information (for example, the second information includes a parameter of the number of PDCCH repetition transmissions), which is not limited here.

[0173] By configuring CORESET0 with a larger resource size, the first PDCCH transmission resource has a larger transmission resource than the fourth PDCCH transmission resource. The network device repeatedly transmits the PDCCH on the first PDCCH transmission resource and / or transmits the PDCCH at a larger aggregation level, so that the terminal device can monitor the repeatedly transmitted PDCCH on the first PDCCH transmission resource and / or blindly detect the PDCCH at a larger aggregation level.

[0174] In this manner, the first PDCCH transmission resource includes a second PDCCH transmission resource and a third PDCCH transmission resource, and the second PDCCH transmission resource and the third PDCCH transmission resource are resources in resources configured based on the same CORESET0 and the same type0 CSS set. Optionally, the second information further indicates the second PDCCH transmission resource and the third PDCCH transmission resource associated with the first PDCCH transmission resource, so that the terminal device monitors the repeatedly transmitted PDCCH on the second PDCCH transmission resource and the third PDCCH transmission resource according to the second information.

[0175] In this method, the second information may include at least one of a PDCCH enhancement switch, a PDCCH repetition number, and a PDCCH aggregation level. The PDCCH enhancement switch, the PDCCH repetition number, and the PDCCH aggregation level can be found in the above description and will not be described again here.

[0176] Method 5: Enhance PDCCH based on idle resources in CORESET

[0177] When the resource size configured by CORESET0 is larger than the resource size actually occupied by the PDCCH, that is, when idle resources exist in the fourth PDCCH transmission resource, the network device can use the idle resources to enhance the PDCCH. That is, the network device can repeatedly transmit the PDCCH in the idle resources, or transmit the PDCCH at a higher aggregation level on the fourth PDCCH transmission resource. In addition, the network device sends second information to the terminal device.

[0178] The second information indicates that the PDCCH is repeatedly transmitted on the first PDCCH transmission resource, and / or the PDCCH is transmitted at a higher aggregation level so that the PDCCH occupies the first PDCCH transmission resource (all resources in the first PDCCH transmission resource are used to transmit the PDCCH). The terminal device determines the first PDCCH transmission resource (i.e., the fourth PDCCH transmission resource) based on the first information, and monitors the repeatedly transmitted PDCCH on the first PDCCH transmission resource based on the second information, or blindly detects the PDCCH at a higher aggregation level. Thereby, resource utilization can be improved and PDCCH performance can be improved.

[0179] In this method, the second information may include at least one of a PDCCH enhancement switch, a PDCCH repetition number, and a PDCCH aggregation level. The PDCCH enhancement switch, the PDCCH repetition number, and the PDCCH aggregation level can be found in the above description and will not be described again here.

[0180] Method 6: Enhance PDCCH based on PDCCH transmission resources corresponding to repeatedly transmitted SSBs

[0181] The SSB carries the configuration information of the PDCCH (PDCCH-configSIB1 in the MIB). When the SSB is repeatedly transmitted, the payload of the repeatedly transmitted SSB is the same, so the repeatedly transmitted SSB carries the same PDCCH configuration information. Moreover, since the index of the repeatedly transmitted SSB is also the same, the terminal device will determine the same type0 PDCCH monitoring timing, or the same PDCCH transmission resource, based on the configuration information of the PDCCH in different repeatedly transmitted SSBs. The PDCCH transmission resource indicated in the SSB is used to schedule SIB1. Different SSBs of repeated transmission can correspond to different PDCCH transmission resources. One SSB corresponds to one PDCCH transmission resource. The different PDCCH transmission resources are used to schedule the same SIB1, but the terminal device can only correspond different SSBs of repeated transmission to the same type0 PDCCH monitoring timing.

[0182] In this method, the network device can associate the PDCCH transmission resources corresponding to the repeatedly transmitted SSBs with different PDCCH transmission resources, so as to repeatedly transmit the type0 PDCCH on the associated PDCCH transmission resources. The network device can also send a second information to the terminal device. The terminal device can associate the different PDCCH transmission resources corresponding to the repeatedly transmitted SSBs based on the second information, so as to receive the repeatedly transmitted type0 PDCCH on the associated PDCCH transmission resources. The first PDCCH transmission resource, for example, includes the PDCCH transmission resource corresponding to the repeatedly transmitted SSB. It should be noted that the different PDCCH transmission resources corresponding to the repeatedly transmitted different SSBs refer to different PDCCH transmission resources in the time domain, and the PDCCH transmission resources corresponding to the repeatedly transmitted different SSBs are of the same size, for example, having the same consecutive symbols and resource blocks.

[0183] In this method, the terminal device can determine the different PDCCH transmission resources corresponding to different SSBs of repeated transmission based on the offset value.

[0184] Optionally, the second information may indicate an offset value. The offset value may 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 in the associated PDCCH transmission resource. Thus, even if the repeatedly transmitted SSB carries the same PDCCH configuration information and the repeatedly transmitted SSB index is the same, the terminal device can determine the position of the PDCCH transmission resource corresponding to each repeatedly transmitted SSB in the time domain based on the second information. For example, based on the configuration information of the PDCCH carried in the SSB, the position of the PDCCH transmission resource corresponding to the first transmission in the repeatedly transmitted SSB in the time domain (for example, type0 PDCCH monitoring opportunity 1) can be determined, the position of the PDCCH transmission resource corresponding to the second transmission in the repeatedly transmitted SSB in the time domain is type0 PDCCH monitoring opportunity 1+offset value, the position of the PDCCH transmission resource corresponding to the third transmission in the repeatedly transmitted SSB in the time domain is type0 PDCCH monitoring opportunity 1+2*offset value... and so on. The second information may be 2 bits. For example, 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 is understood that the offset value indicated by the second information here is only for example and should not be understood as limiting the present application, and the second information may also indicate a symbol or time slot offset value. For example, 01 may also indicate 20 ms, 40 ms, etc., or may indicate 14 symbols, 28 symbols, or indicate 1 time slot, 2 time slots, etc.

[0185] Optionally, the second information may indicate a PDCCH enhancement switch or the number of PDCCH retransmissions. The PDCCH enhancement switch and the number of PDCCH retransmissions may refer to the relevant descriptions above and will not be repeated 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 of repeated transmission according to the offset value. In one implementation, in this case the offset value may be preset, or the offset value may be pre-configured on the terminal device, that is, the second information indicates PDCCH enhancement, then the terminal device may determine that in the PDCCH transmission resources corresponding to different SSBs of repeated transmission, the interval between adjacent PDCCH transmission resources in the time domain is the offset value. In another implementation, the offset value may be determined based on the time interval between adjacent SSBs in the time domain in the repeatedly transmitted SSB, for example, the offset value is equal to the time interval.

[0186] Optionally, the offset value between the PDCCH transmission resources corresponding to the repeatedly transmitted SSB may 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 repeatedly transmitted SSB (determines that the SSB is repeatedly transmitted and meets the conditions for PDCCH enhancement), the offset value is obtained through Table 7. Since the repeatedly transmitted SSB carries the same PDCCH configuration information, the same row in the same table can be determined based on the PDCCH configuration information carried in the repeatedly transmitted SSB. The terminal device determines the position of the PDCCH transmission resource corresponding to the current SSB in the time domain based on how many times the current SSB is transmitted in the repeatedly transmitted SSB.

[0187] Table 7. Configuration parameters of type0 CSS set

[0188] It is understood that the parameter values ​​in Table 7 are merely examples, and Table 7 lists only one row. In practice, Table 7 may have more rows, and this should not be construed as limiting the present application. Table 7 uses the offset value as an example of the interval duration. It is understood that the offset value may also be a symbol offset value, a time slot offset value, or the like, without limitation herein.

[0189] Table 7 adds a column relative to Table 1. Of course, the offset value may not be indicated by adding the "offset value" column on the basis of Table 1. When the terminal device determines that the network device enhances the PDCCH based on the PDCCH transmission resources corresponding to the repeatedly transmitted SSB, the terminal device calculates the PDCCH monitoring timing corresponding to the PDCCH transmission resources through a preset algorithm. The preset algorithm includes a preset offset value. The input parameters of the preset algorithm may include the repetition sequence number of the current SSB (that is, the number of times the SSB is transmitted among the repeatedly transmitted SSBs). Therefore, according to the preset algorithm, the PDCCH transmission resources corresponding to the current SSB can be obtained, and the offset in the time domain of the PDCCH transmission resources corresponding to the first transmitted SSB among the repeatedly transmitted SSBs can be obtained, so as to accurately determine the PDCCH transmission resources corresponding to different repeatedly transmitted SSBs, and then monitor the repeatedly transmitted type0 PDCCH on the corresponding PDCCH transmission resources.

[0190] It should be noted that at least two of the above-mentioned methods 1 to 6 can be combined with each other. For example, method 1 can be combined with method 2, method 2 can be combined with method 4, method 1 can be combined with method 6, method 2 can be combined with method 3, or method 3 can be combined with method 5, or method 4 can be combined with method 5, or method 1, method 2 and method 3 can be combined, or method 1, method 3 and method 4 can be combined, etc., and examples are not listed here one by one.

[0191] For example, the combination of mode 1 and mode 4 is used as an example for explanation. Assuming that the PDCCH is not enhanced, the network device configures a 48 RBs size for the PDCCH (for example ) of CORESET0, and the PDCCH aggregation level is 8. When enhancing PDCCH, the network device configures CORESET0 with larger resources for PDCCH (for example ), and utilize the first type0 PDCCH monitoring opportunity and the second type0 PDCCH monitoring opportunity to enhance the PDCCH. The resource size corresponding to the first type0 PDCCH monitoring opportunity and the second type0 PDCCH monitoring opportunity is 96 RBs. The network device may send the PDCCH twice on the first type0 PDCCH monitoring opportunity and twice on the second type0 PDCCH monitoring opportunity, with an aggregation level of 8. Alternatively, the network device may send the PDCCH once on the first type0 PDCCH monitoring opportunity and once on the second type0 PDCCH monitoring opportunity, with an aggregation level of 16.

[0192] For example, the combination of the second method and the fifth method is used as an example for explanation. Assuming that the PDCCH is not enhanced, the network device configures a 48 RBs size for the PDCCH (for example ) of CORESET0, the number of type0 CSS sets in the time slot is 1, the PDCCH aggregation level is 8, the actual transmission of the PDCCH uses 24RBs, and the idle resource size is 24RBs. When enhancing PDCCH, the network device configures 48RBs for PDCCH (for example ) of CORESET0, the number of type0 CSS sets in the time slot is 2, and the two type0 CSS sets in the associated time slot (for example, the first type0 CSS set and the second type0 CSS set) are associated. The resource size of the second PDCCH transmission resource (the resource based on the second type0 CSS set and the CORESET configuration) is 48 RBs, and the resource size of the second PDCCH transmission resource (the resource based on the first type0 CSS set and the CORESET configuration) is 48 RBs. The network device can send PDCCH twice on the second PDCCH transmission resource (each PDCCH transmission uses 24 RBs) and twice on the third PDCCH transmission resource (each PDCCH transmission uses 24 RBs). The aggregation level of the PDCCH is 8, that is, the PDCCH is transmitted 4 times in total. Alternatively, the network device can send a PDCCH once at an aggregation level of 16 on the second PDCCH transmission resource and send a PDCCH once at an aggregation level of 16 on the third PDCCH transmission resource, that is, the PDCCH is transmitted 2 times in total.

[0193] 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 a 1-bit reserved bit in the MIB message. 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 bit of the 2 reserved bits, or in the 2 reserved bits. For example, when the PDCCH subcarrier spacing (SCS) (or the common subcarrier spacing (SubCarrierSpacingCommon) in the MIB) indicates 15Khz in the FR1 band, the synchronization broadcast block subcarrier offset boundary offset (Kssb) includes an unused 1 bit, and the second information can be carried in the 1 bit. This is because the NR standard stipulates that for FR1, for SSB type A, that is, numerology: {μ = 0, 1}, SSB SCS = 15kHz or 30kHz, the Kssb value needs to be determined by 5 bits, of which the MSB highest bit comes from the sixth bit of the PBCH payload 8 bits The remaining 4 LSBs come from the ssb-SubcarrierOffset field in the MIB. During actual configuration, when the PDCCH SCS is 30Khz, Kssb requires 5 bits to determine. When the PDCCH SCS is 15Khz, Kssb can be determined by 4 bits. Therefore, when the FR1 frequency band indicates 15Khz, Kssb includes 1 unused bit. Of course, it is also possible to add a new parameter to the MIB message to carry the second information, which is not limited here. When the second information requires more bits to carry, 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 the FR1 frequency band indicates 15Khz can be used to carry the second information.

[0194] 2. PDCCH enhancements outside the type0 CSS set

[0195] For other types of common search space configurations (type0A / 0B / 1 / 1A / 2 / 2A CSS set, etc.), after decoding the SIB1 message, the terminal device obtains the PDCCH-ConfigCommon→SearchSpace configuration from the RRC signaling. This configuration is a list containing the configurations of multiple search space sets, each with a different search space type, corresponding DCI format, PDCCH candidate aggregation level and number, etc. For type3 CSS set and USS set, after decoding the SIB1 message, the terminal device obtains the PDCCH-Config→SearchSpace configuration from the RRC signaling, containing the configurations of multiple search space sets, each with a different search space type (type), corresponding DCI format, PDCCH candidate aggregation level and number, etc.

[0196] The first information includes, for example, SearchSpace in PDCCH-ConfigCommon or SearchSpace in PDCCH-Config. The first information may also include configuration information of CORESET.

[0197] Method 7: Enhance PDCCH based on monitoring opportunities within a time slot

[0198] In one implementation, the network device indicates to the terminal device through second information that the PDCCH resources configured in the corresponding search space set (type0A / 0B / 1 / 1A / 2 / 2A / 3 CSS set, or USS set) can be associated, that is, M PDCCH monitoring opportunities in the same time slot can be associated, and the PDCCH transmission resources corresponding to the associated M PDCCH monitoring opportunities are first PDCCH transmission resources, so that the network device enhances the PDCCH on the first PDCCH transmission resource. The M PDCCH monitoring opportunities, for example, include a first PDCCH monitoring opportunity and a second PDCCH monitoring opportunity, the transmission resource corresponding to the first PDCCH monitoring opportunity is a third PDCCH transmission resource, and the transmission resource corresponding to the second PDCCH monitoring opportunity is a second PDCCH transmission resource. The terminal device determines the first PDCCH transmission resource based on the second information, associates the second PDCCH transmission resource with 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 at a higher aggregation level on the first PDCCH transmission resource. M is an integer greater than or equal to 2.

[0199] Exemplarily, as shown in Figure 6, taking type0A / 0B / 1 / 1A / 2 / 2A CSS set and PDCCH MO as 2 as an example, the configuration element SearchSpace→monitoringSymbolsWithinSlot=10000001000000 indicates that the starting symbols (0 and 7) of two groups of PDCCH monitoring opportunities are configured in the slot. When CORESET0 occupies two OFDM symbols, it means that the network side configures two PDCCH monitoring opportunities (or PDCCH transmission resources) in 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 the multiple PDCCH monitoring opportunities contained in the CSS set can be associated (obtaining the first PDCCH transmission resource), and the PDCCH can be repeatedly transmitted on the associated PDCCH resources, and / or transmitted at a higher aggregation level. Accordingly, the terminal device determines the association of multiple monitoring opportunities within the time slot based on the second information, monitors the repeatedly transmitted PDCCH on the PDCCH transmission resources (first PDCCH transmission resources) corresponding to the multiple PDCCH monitoring opportunities, and / or blindly detects the PDCCH at a higher aggregation level. It can be understood that the starting symbol of the PDCCH monitoring opportunity here is only used as an example and should not be understood as a limitation to the present application. The starting symbol can also be other symbols, for example, the starting symbol can also be 0 and 4, or 0 and 8, etc., which are not limited here.

[0200] Method 8: Enhanced PDCCH based on CORESET

[0201] For type0A / 0B / 1 / 1A / 2 / 2A / 3 CSS set, or PDCCH in USS set, the PDCCH transmission resources can also be extended by reconfiguring the associated CORESET. For example, the time domain resources (increase the number of symbols) and / or frequency domain resources (increase the number of resource blocks) in the associated CORESET can be increased to obtain the first PDCCH transmission resource. The network device then 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 in the associated first PDCCH transmission resource for PDCCH enhancement. In response to the second information, the terminal device monitors the repeatedly transmitted PDCCH on the first PDCCH transmission resource, or blindly detects the PDCCH at a higher aggregation level.

[0202] Method 9: Enhance PDCCH based on idle resources in CORESET

[0203] When the resource size configured by the CORESET is larger than the resource size actually occupied by the PDCCH, that is, when idle resources exist in the fourth PDCCH transmission resource, the network device may utilize the idle resources to enhance the PDCCH. Specifically, the network device may repeatedly transmit the PDCCH in the idle resources, or transmit the PDCCH at a higher aggregation level on the fourth PDCCH transmission resource. Furthermore, the network device sends second information to the terminal device.

[0204] The second information indicates that the PDCCH is repeatedly transmitted on the first PDCCH transmission resource, and / or the PDCCH is transmitted at a higher aggregation level so that the PDCCH occupies the first PDCCH transmission resource (all resources in the first PDCCH transmission resource are used to transmit the PDCCH). The terminal device determines the first PDCCH transmission resource (i.e., the fourth PDCCH transmission resource) based on the first information, and monitors the repeatedly transmitted PDCCH on the first PDCCH transmission resource based on the second information, or blindly detects the PDCCH at a higher aggregation level. Thereby, resource utilization can be improved and PDCCH performance can be improved.

[0205] In Methods 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 a 1-bit reserved bit in the MIB message. For example, in the FR-1 frequency 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 bit of the 2 reserved bits, or in the 2 reserved bits. For example, when the PDCCH SCS (or SubCarrierSpacingCommon in the MIB) indicates 15Khz in the FR1 frequency band, the synchronization broadcast block subcarrier offset boundary offset (Kssb) includes an unused 1 bit, and the second information can be carried in the 1 bit. Of course, it is also possible to add a new parameter to the MIB message to carry the second information, which is not limited here. When the second information requires more bits to carry, at least two of the reserved 1-bit in the MIB message, the 2 reserved bits in the additional 8 bits of the PBCH payload, and the unused 1 bit in Kssb when the FR1 frequency band indicates 15Khz can be used to carry the second information.

[0206] In another implementation, the second information may also be carried in RRC signaling, for example, a new higher layer parameter may be introduced in SIB1, and the overhead occupied may be 1 bit, 2 bits, 3 bits or more.

[0207] In another implementation, the second information can be carried in the DCI. For example, for type 0 PDCCH that is not scheduled for SIB1, for example, in the random access channel (RACH) stage, downlink control channels (PDCCH) such as Msg2, Msg3, Msg4, Msg5, etc. are scheduled. 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 signalings between the terminal and the network side. The network device uses the DCI that schedules Msg2, that is, some bits in the reserved bits in the RA-RNTI scrambled DCI format 1_0 (there are 16 reserved bits in the DCI in the protocol) to carry the second information to indicate to the terminal device the subsequent PDCCH enhancement in the common search space. Optionally, the second information may occupy multiple bits, each bit indicating an enhancement of a type 0A / 0B / 1 / 1A / 2 / 2A PDCCH in a subsequent downlink channel. Different bits in the multiple bits may indicate enhancements of different types of PDCCHs. The multiple bits may be, for example, 2 bits, 3 bits, 4 bits or more bits. For example, taking 3 bits as an example, one bit may indicate an enhancement of type0A PDCCH in all subsequent downlink channels, one bit may indicate an enhancement of type1 PDCCH in all subsequent downlink channels, and one bit may indicate an enhancement of type2 PDCCH in all subsequent downlink channels. Of course, the second information may also be 1 bit, indicating an enhancement of a type of PDCCH in type 0A / 0B / 1 / 1A / 2 / 2A PDCCH.

[0208] For example, in addition to using the reserved bits in the DCI that schedules Msg2 to carry the second information, other DCIs can also be used to carry the second information. Examples include the idle bits in the RAR UL grant initially transmitted in Msg3. Alternatively, some fields in the DCIs that schedule Msg3 and Msg4 can be reinterpreted. For example, the MCS field in the DCI has 5 bits, two of which can be used to carry the second information.

[0209] Method 10: Enhance PDCCH based on search space sets associated with different CORESETs

[0210] After decoding the SIB message, the terminal device obtains the RRC high-level parameter PDCCH-ConfigCommon from the SIB, that is, the cell-level PDCCH resource configuration. This parameter contains the information element commonControlResourceSet, which is used to provide the terminal with additional CORESET configurations in addition to CORESET0.

[0211] Each CORESET configured for the terminal device corresponds to a different search space set, which includes its own PDCCH candidate configuration (aggregation level, number).

[0212] This method can introduce new parameters in the SIB message to enable association between multiple CORESETs and association between PDCCH candidates between different SS sets (not limited to search space types) corresponding to multiple CORESETs. That is, the first PDCCH transmission resource includes resources configured based on the associated multiple search space sets. The associated multiple CORESETs include, for example, the first CORESET and the second CORESET, and the associated multiple search space sets include, for example, the first SS set and the 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 a resource configured based on the first CORESET and the first SS set, and the second PDCCH transmission resource is a resource based on the second CORESSET and the second SS set. Thus, the flexibility of the network device in cooperating with the first PDCCH transmission resource can be improved. When enhancing PDCCH, the network device repeatedly sends PDCCH in the PDCCH candidates associated with the second PDCCH transmission resource and the third PDCCH transmission resource, or sends PDCCH at a higher aggregation level.

[0213] In one possible implementation, a new information element may be introduced into the SIB message, the new information element indicating the associated CORESET index and the corresponding associated SearchSpace index. Optionally, the new information element is, for example, "linked_CoresetIndexes_SearchSpaceIndexes". In this embodiment, the second information includes the new information element.

[0214] When the PDCCH candidate aggregation levels and the number of candidates for each aggregation level are the same in multiple configured SS sets, the above information element configuration defaults to associating the 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 PDCCH candidate aggregation levels and numbers in multiple configured SS sets are different, the index of the specific PDCCH candidate to be associated in the associated SS set can be indicated in addition to the above information element configuration.

[0215] Therefore, after receiving the second information, the terminal device determines the associated search space and the associated PDCCH candidate, so that it can monitor the repeatedly transmitted PDCCH at the associated PDCCH candidate, or blindly detect the PDCCH candidate at a higher aggregation level.

[0216] It should be noted that at least two of the above-mentioned methods 7 to 10 can be combined. For example, method 7 can be combined with at least one of methods 8, 9, and 10; method 8 can be combined with at least one of methods 7, 9, and 10; method 9 can be combined with at least one of methods 7, 8, and 10; or method 10 can be combined with at least one of methods 7, 8, and 9.

[0217] It can be understood that methods 1 to 5 and methods 7 to 10 are for PDCCHs of different types of search spaces, and there is no conflict between methods 1 to 5 and methods 7 to 10.

[0218] S303: The network device sends a PDCCH on the first PDCCH resource. Correspondingly, the terminal device monitors the PDCCH on the first PDCCH resource.

[0219] The network device repeatedly transmits the PDCCH on the first PDCCH resource and / or transmits the PDCCH at a higher aggregation level. Accordingly, the terminal device monitors the repeatedly transmitted PDCCH on the first PDCCH resource and / or blindly detects the PDCCH at a higher aggregation level.

[0220] In this embodiment, by extending PDCCH transmission resources or utilizing idle resources to enhance type0 / 0A / 0B / 1 / 1A / 2 / 2A PDCCH, the performance and coverage of type0 / 0A / 0B / 1 / 1A / 2 / 2A PDCCH can be improved, thereby improving the success rate of terminal equipment decoding type0 / 0A / 0B / 1 / 1A / 2 / 2A PDCCH. For type3 PDCCH or PDCCH in UE-specific search space, this solution can increase the number of repeated transmissions of this type of PDCCH to be greater than or equal to 3 times, or increase the aggregation level of this type of PDCCH, or utilize different monitoring timings of the search space, CORESET extension, or idle resources to enhance PDCCH, thereby further improving the performance and coverage of type3 PDCCH or PDCCH in UE-specific search space. For example, in an NTN scenario, the success rate of PDCCH decoding by terminal equipment in edge beams or cells can be improved, thereby improving the coverage of PDCCH in NTN scenarios. In non-NTN scenarios, this solution can also improve the PDCCH coverage and performance at the cell edge or edge beam, and increase the success rate of PDCCH decoding by terminal devices at the cell edge.

[0221] In the scheme described in S301-S303 above, an example is given in which the network device sends the second information to the terminal device to indicate PDCCH enhancement. In the following scenarios, the network device may also indicate PDCCH enhancement to the terminal device without using the second information. The terminal device enables PDCCH enhancement when the conditions are met, 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. Thereby, the signaling overhead can be reduced. In one 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 the NTN frequency band is currently used to communicate with the network device, determines the first PDCCH transmission resource based on 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.

[0222] In another implementation, the terminal device has sent third information to the network device, and 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 PDCCH enhancement. The network device responds to the third information to enhance the PDCCH 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, such as dividing the PRACH resources into 4 groups, where if the terminal uses the PRACH resources of the first group, it indicates that the terminal does not request / report the capability (for PDCCH repetition). If the terminal uses the second group of PRACH resources to send msg1, it indicates that the terminal requests two PDCCH repetitions, or reports the capability to support two PDCCH repetitions. Alternatively, the third information can also be reported through Msg3 high-level 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, which has 289 reserved codepoints. One or more of these codepoints can be used to carry the third information; or one or both of the two "R" bits (reserved bits) in the Msg3 MAC subheader can be directly used to carry the third information.

[0223] Of course, in these scenarios (the terminal device and the network device communicate 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, and there is no restriction here.

[0224] The following describes a communication device used to implement the above method in an embodiment of the present application with reference to the accompanying drawings.

[0225] As shown in Figure 7, it is a possible exemplary block diagram of a communication device involved in this application. The communication device 700 can correspondingly implement the functions or steps implemented by the terminal device or network device in the above-mentioned various method embodiments. The communication device may include a transceiver module 701 and a processing module 702. Optionally, it may also include a storage module, which can be used to store instructions (code or program) and / or data. The processing module 702 can be coupled to the storage module. For example, the processing module 702 can read the instructions (code or program) and / or data in the storage module to implement the corresponding method. The above-mentioned modules can be set independently or partially or fully integrated.

[0226] It should be understood that the processing module 702 can be a processor or controller, for example, a general-purpose central processing unit (CPU), a general-purpose processor, a digital signal processing (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It can implement or execute the various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. The processor can also be a combination that implements computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. 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 an interface circuit of the chip for receiving signals from other chips or devices, or, it is an interface circuit of the chip for sending signals to other chips or devices.

[0227] The communication device 700 may be a network device or terminal device in the above-described embodiments, or may be a chip for implementing the functions of the network device or terminal device in the above-described embodiments. For example, when the communication device 700 is a network device or terminal device, the processing module 702 may be, for example, a processor, and the transceiver module 701 may be, for example, a transceiver. Optionally, the transceiver may include a radio frequency circuit, and the storage unit may be, for example, a memory. For example, when the communication device 700 is a chip for implementing the functions of the network device or terminal device, the processing module 702 may be, for example, a processor, and the transceiver module 701 may be, for example, an input / output interface, a pin, or a circuit. The processing module 702 may execute computer-executable instructions stored in a storage unit. Optionally, the storage unit may be a storage unit within the chip, such as a register or cache. The storage unit may also be a storage unit located outside the chip within the network device, terminal device, or location management device, such as a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, or a random access memory (RAM).

[0228] In some possible implementations, the communication device 700 can implement the behaviors and functions of the terminal device in the above-mentioned method embodiments. For example, the communication device 700 can be a terminal device, or a component (such as a chip or circuit) used in the terminal device. The transceiver module 701 can be used to support communication between the terminal device and other network entities, such as supporting communication between the terminal device and the network device shown in Figure 3, or communication with a positioning management device. The processing module 702 is used to control and manage the actions of the terminal device. For example, the processing module 702 is used to support the terminal device to perform all operations of the terminal device in Figure 3 except for transceiver transmission.

[0229] For example, the transceiver module 701 can be used to perform all receiving or sending operations performed by the terminal device in the embodiment shown in Figure 3, such as S301, S302, S303, etc. in the embodiment shown in Figure 3, and / or other processes for supporting the technology described herein. Among them, the processing module 702 is used to perform all operations performed by the terminal device in the embodiment shown in Figure 3 except for the transceiver operations, such as other processes for supporting the technology described herein.

[0230] In some embodiments, the transceiver module 701 is configured to receive first information, where the first information indicates configuration information of a physical downlink control channel (PDCCH).

[0231] When the conditions are met, the transceiver module 701 is used to monitor PDCCH on the first PDCCH transmission resource according to the first information, and the first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing PDCCH, and enhancing PDCCH includes repeatedly transmitting PDCCH and / or increasing the aggregation level of PDCCH.

[0232] In one possible implementation, satisfying the condition includes satisfying at least one of the following conditions:

[0233] The transceiver module 701 receives the second information, where the second information indicates an enhanced PDCCH;

[0234] The frequency band corresponding to the first information received by the transceiver module 701 is a non-terrestrial network frequency band;

[0235] The transceiver module 701 sends third information, where the third information indicates an enhanced PDCCH.

[0236] In one possible implementation, the PDCCH is used to schedule system information block SIB1. Processing module 702 is configured to determine, based on first information, a first PDCCH transmission resource when a condition is met; a second PDCCH transmission resource is a resource configured based on a control resource set CORESET0, and / or a resource configured based on a type 0 PDCCH common search space set.

[0237] In one 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 opportunity, the second PDCCH transmission resource corresponds to a second type0 PDCCH monitoring opportunity, and 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 for different SSBs for repeated transmission.

[0238] In one 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 located in the same time slot.

[0239] 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.

[0240] In one 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 opportunity, the second PDCCH transmission resource corresponds to a second PDCCH monitoring opportunity, and the first PDCCH monitoring opportunity and the second PDCCH monitoring opportunity belong to the same time slot.

[0241] In one 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 in a fourth PDCCH transmission resource configured based on the same CORESET and the same search space.

[0242] 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.

[0243] In one 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.

[0244] In some possible implementations, the communication device 700 can implement the behaviors and functions of the network device in the above-mentioned method embodiments. For example, the communication device 700 can be a network device, or a component (such as a chip or circuit) used in the network device. The network device is, for example, an access network device, such as a base station or a TRP. The transceiver module 701 can be used to support communication between the network device and other network entities, for example, to support communication between the network device and the terminal device shown in Figure 3. 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 perform all operations except transceiver in Figure 3.

[0245] In some embodiments, the transceiver module 701 is configured to transmit first information indicating configuration information of a physical downlink control channel (PDCCH). When a condition is met, the transceiver module 701 is configured to transmit a PDCCH on a first PDCCH transmission resource, where the first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing the PDCCH, where the enhancing the PDCCH includes repeatedly transmitting the PDCCH and / or increasing the aggregation level of the PDCCH.

[0246] In some possible implementations, satisfying the condition includes satisfying at least one of the following conditions:

[0247] The elevation angle of the beam used to send the first information is smaller than a preset angle;

[0248] The transceiver module 701 sends the first information via a non-terrestrial network frequency band;

[0249] The transceiver module 701 receives third information, where the third information indicates an enhanced PDCCH.

[0250] In some possible implementations, the PDCCH is used to schedule the system information block SIB1, the second PDCCH transmission resource is a resource configured based on the control resource set CORESET0, and / or the second PDCCH transmission resource is a resource configured based on a type0 PDCCH common search space set.

[0251] In some possible implementations, 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 opportunity, the second PDCCH transmission resource corresponds to a second type0 PDCCH monitoring opportunity, and 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 for different SSBs for repeated transmission.

[0252] In some possible implementations, 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 located in the same time slot.

[0253] In some possible implementations, 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.

[0254] In some possible implementations, 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 opportunity, the second PDCCH transmission resource corresponds to a second PDCCH monitoring opportunity, and the first PDCCH monitoring opportunity and the second PDCCH monitoring opportunity belong to the same time slot.

[0255] In some possible implementations, 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.

[0256] In some possible implementations, 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.

[0257] In some possible implementations, 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.

[0258] It should be understood that the processing module 702 in the embodiment of the present application can be implemented by a processor or a processor-related circuit component, and the transceiver module 701 can be implemented by a transceiver or a transceiver-related circuit component.

[0259] As shown in Figure 8, it is a structural diagram of a communication device provided by the present application, wherein the communication device 800 can be a network device, such as a base station, TRP, etc., which can implement the functions of the network device in the method provided in the embodiment of the present application, or the communication device 800 can be a terminal device, which can implement the functions of the terminal device in the method provided in the embodiment of the present application; or the communication device 800 can also be a device that can support the network device or terminal device to implement the corresponding functions in the method provided in the embodiment of the present application. The communication device 800 can be a chip system. In the embodiment of the present application, the chip system can be composed of chips, or it can include chips and other discrete devices.

[0260] The communication device 800 includes at least one processor 820. The processor 820 can 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 in implementing the functions of the network device or terminal device in the method provided in the embodiment of the present application. For details, please refer to the detailed description in the method example, which is not repeated here.

[0261] The communication device 800 may also 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 embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 820 may operate in conjunction 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.

[0262] The communication device 800 may also include a communication interface 810, which may be any transceiver-like device for communicating with other devices or communication networks, such as a RAN, a wireless local area network (WLAN), or a wired access network. The communication interface 810 is used to communicate with other devices via a transmission medium, thereby enabling the device in the communication device 800 to communicate with other devices. For example, when the communication device 800 is a network device, the other device may be a terminal device or a location management function; alternatively, when the communication device is a terminal device, the other device may be 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.

[0263] The specific connection medium between the communication interface 810, processor 820, and memory 830 is not limited in the embodiments of the present application. In Figure 8, the embodiment of the present application shows that the memory 830, processor 820, and communication interface 810 are connected via a bus 840. The bus is represented by a bold line in Figure 8. The connection method between other components is only for schematic illustration and is not limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one bold line is used in Figure 8, but this does not mean that there is only one bus or one type of bus.

[0264] 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 device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0265] The memory 830 may 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 an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store 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 may exist independently and be connected to the processor via a communication line. The memory may also be integrated with the processor.

[0266] The memory 830 is used to store computer-executable instructions for executing the solution of the present application, and the execution is controlled by the processor 820. The processor 820 is used to execute the computer-executable instructions stored in the memory 830, thereby implementing the communication method provided by the above embodiment of the present application.

[0267] Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.

[0268] It should be noted that the communication device in the above embodiments can be a terminal device or a circuit, or a chip used in a terminal device or other combined devices, components, etc. having the functions of the above terminal devices. When the communication device is a terminal device, the transceiver module can be a transceiver, which can include an antenna and a radio frequency circuit, etc., and the processing module can be a processor, such as a central processing unit (CPU). When the communication device is a component having 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), a dedicated 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 chip. 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 may be a code / data read / write interface circuit. The interface circuit may be configured to receive code instructions (the code instructions are stored in a memory and may be read directly from the memory or read from the memory via another device) and transmit them to a processor; the processor may be configured to execute the code instructions to perform the method in the above-described method embodiment. For another example, the interface circuit may be a signal transmission interface circuit between a communication processor and a transceiver.

[0269] For example, the communication device in the above embodiment may be a chip, which includes a logic circuit and an input / output interface, and may also include a memory. The input / output interface may be used to receive code instructions (the code instructions are stored in the memory and may be read directly from the memory or read from the memory via another device) and transmit them to the logic circuit; the logic circuit may be used to execute the code instructions to perform the method in the above method embodiment. Alternatively, the input / output interface may be a signal transmission interface circuit between the logic circuit and a transceiver.

[0270] Figure 9 shows a simplified schematic diagram of the structure of a communication device. For ease of understanding and illustration, Figure 9 uses a base station as an example. This base station can be used in the system shown in Figure 1 or 2, and can be the network device shown in Figure 1 or 2, performing the functions of the network device in the above method embodiments.

[0271] The communication device 900 may include a transceiver 910, a memory 921, and a processor 922. The transceiver 910 may be used for communication, such as sending the aforementioned broadcast message. The memory 921 is coupled to the processor 922 and may 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 in executing the corresponding functions of the aforementioned method, which may be implemented by invoking the programs stored in the memory 921.

[0272] 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 a wireless air interface. The transceiver 910 can also be called 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, wherein the radio frequency unit, such as a remote radio unit (RRU) or an active antenna unit (AAU), can be specifically used for transmitting radio frequency signals and converting radio frequency signals into baseband signals, and the one or more antennas can be specifically used for radiating and receiving radio frequency signals. Optionally, the transceiver 910 can 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.

[0273] The memory 921 and the processor 922 can be integrated into one or independent of each other. As shown in Figure 9, 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, and the baseband unit may 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 wireless access technologies. The above-mentioned control unit 920 may be composed of one or more antenna panels, wherein multiple antenna panels can jointly support a wireless access network of a single access standard (such as an LTE network), and multiple antenna panels can also respectively support wireless access networks of different access standards (such as an LTE network, a 5G network or other networks).

[0274] The memory 921 and processor 922 can serve one or more antenna panels. That is, each antenna panel can be provided with a separate memory 921 and processor 922. Alternatively, multiple antenna panels can share the same memory 921 and processor 922. Furthermore, each antenna panel can be provided with necessary circuitry, such as circuitry for coupling the memory 921 and processor 922. The transceiver 910, processor 922, and memory 921 can be connected via a bus structure and / or other connection media.

[0275] Based on the structure shown in Figure 9, when communication device 900 needs to send data, processor 922 performs baseband processing on the data to be transmitted and outputs the baseband signal to the RF unit. The RF unit then performs RF processing on the baseband signal and transmits the RF signal via the antenna in the form of electromagnetic waves. When data is sent to communication device 900, the RF unit receives the RF signal via the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to processor 922. Processor 922 converts the baseband signal into data and processes the data.

[0276] Based on the structure shown in FIG9 , the transceiver 910 may be configured to execute the steps executed by the transceiver module 701 . And / or, the processor 922 may be configured to call instructions in the memory 921 to execute the steps executed by the processing module 702 .

[0277] Figure 10 shows a simplified structural diagram of a terminal device. For ease of understanding and illustration, in Figure 10, the terminal device takes a mobile phone as an example. As shown in Figure 10, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and input and output devices. The processor is mainly used to process communication protocols and communication data, as well as to control the on-board unit, execute software programs, process software program data, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for converting baseband signals into radio frequency signals and processing radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of devices may not have input and output devices.

[0278] When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then transmits the RF signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, only one memory and processor are shown in Figure 10. In actual device products, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be set independently of the processor or integrated with the processor, and this embodiment of the application does not limit this.

[0279] In the embodiments of the present application, the antenna and radio frequency circuit with transceiver functions can be regarded as the transceiver unit of the device, and the processor with processing function can be regarded as the processing unit of the device. As shown in Figure 10, 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, a transceiver device, etc. The processing unit 1020 can also be referred to as a processor, a processing board, a processing module, a processing device, etc. Optionally, the device used to implement the receiving function in the transceiver unit 1010 can be regarded as a receiving unit, and the device used to implement the transmitting function in the transceiver unit 1010 can be regarded as a transmitting unit, that is, the transceiver unit 1010 includes a receiving unit and a transmitting unit. The transceiver unit 1010 can sometimes also be referred to as a transceiver, 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 transmitting unit can sometimes also be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0280] It should be understood that the transceiver unit 1010 is used to perform the sending and receiving operations on the terminal side in the above method embodiment, and the processing unit 1020 is used to perform other operations on the terminal except the sending and receiving operations in the above method embodiment.

[0281] When the communication device is a chip-type device or circuit, the device may include a transceiver unit and a processing unit, wherein the transceiver unit may be an input / output circuit and / or a communication interface; and the processing unit may be an integrated processor, microprocessor, or integrated circuit.

[0282] An embodiment of the present application also provides a computer-readable storage medium, including instructions, which, when executed on a computer, enables the computer to execute the method executed by the network device and terminal device in Figure 3, or execute the method executed by the above-mentioned positioning management device.

[0283] An embodiment of the present application also provides a computer program product, including instructions, which, when executed on a computer, enables the computer to execute the method executed by the network device and terminal device in Figure 3, or execute the method executed by the above-mentioned positioning management device.

[0284] The embodiment of the present application provides a chip system, which includes a processor and may also include a memory, for implementing the functions of the network device and the terminal device in the aforementioned method. The chip system can be composed of a chip or include a chip and other discrete devices.

[0285] The methods provided in the embodiments of the present application may be implemented in whole or in part through software, hardware, firmware, or any combination thereof. When implemented using software, they may 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 device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. 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 data center that includes one or more available media. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (DVD)), or a semiconductor medium (e.g., an SSD), etc.

[0286] Obviously, those skilled in the art may make various changes and modifications 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 equivalents, the present application is intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: The method comprises: Receiving first information, where the first information indicates configuration information of a physical downlink control channel PDCCH; When the conditions are met, the PDCCH is monitored on a first PDCCH transmission resource according to the first information, the first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing the PDCCH, and the enhancing the PDCCH includes repeatedly transmitting the PDCCH and / or increasing the aggregation level of the PDCCH.

2. The method according to claim 1, characterized in that The satisfying condition includes satisfying at least one of the following conditions: receiving second information, wherein the second information indicates enhancing the PDCCH; The frequency band corresponding to receiving the first information is a non-terrestrial network frequency band; Third information is sent, where the third information indicates that the PDCCH is enhanced.

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 met, the first PDCCH transmission resource is determined according to the first information; the second PDCCH transmission resource is a resource configured based on the control resource set CORESET0, and / or the second PDCCH transmission resource is a resource configured based on a type 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 opportunity, the second PDCCH transmission resource corresponds to a second type0 PDCCH monitoring opportunity, and 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.

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, characterized in that 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, characterized in that: 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 timing, the second PDCCH transmission resource corresponds to a second PDCCH monitoring timing, and the first PDCCH monitoring timing and the second PDCCH monitoring timing belong to the same time slot.

8. The method according to claim 1 or 2, characterized in that: 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, characterized in that The search space set is a type 0 / 0A / 0B / 1 / 1A / 2 / 2A / 3 public search space set, or the search space set is a user equipment-specific search space set.

10. The method according to claim 1 or 2, characterized in that: 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.

11. The method according to any one of claims 1 to 10, characterized in that The method further comprises: Associating the second PDCCH transmission resource and the third PDCCH transmission resource in the first PDCCH transmission resource; The repeatedly transmitted PDCCH is monitored on the second PDCCH transmission resource and the third PDCCH transmission resource, and / or the PDCCH is blindly detected at the aggregation level on the first PDCCH transmission resource.

12. A communication method, characterized in that: The method comprises: Sending first information, where the first information indicates configuration information of a physical downlink control channel PDCCH; When the condition is met, the PDCCH is sent on a first PDCCH transmission resource, the first PDCCH transmission resource includes a second PDCCH transmission resource for enhancing the PDCCH, and the enhancing the PDCCH includes repeatedly transmitting the PDCCH and / or increasing the aggregation level of the PDCCH.

13. The method according to claim 12, characterized in that The satisfying condition includes satisfying at least one of the following conditions: The elevation angle of the beam used to send the first information is less than a preset angle; Sending the first information via a non-terrestrial network frequency band; Third information is received, where the third information indicates enhancing the PDCCH.

14. The method according to claim 12 or 13, characterized in that The PDCCH is used to schedule system information block SIB1, 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 type 0 PDCCH common search space set.

15. The method according to claim 14, 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 opportunity, the second PDCCH transmission resource corresponds to a second type0 PDCCH monitoring opportunity, and 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.

16. The method according to claim 14, 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.

17. The method according to claim 14, characterized in that 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.

18. The method according to claim 12 or 13, characterized in that: 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 timing, the second PDCCH transmission resource corresponds to a second PDCCH monitoring timing, and the first PDCCH monitoring timing and the second PDCCH monitoring timing belong to the same time slot.

19. The method according to claim 12 or 13, characterized in that: 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.

20. The method according to claim 19, characterized in that The search space set is a type 0 / 0A / 0B / 1 / 1A / 2 / 2A / 3 public search space set, or the search space set is a user equipment-specific search space set.

21. The method according to claim 12 or 13, characterized in that 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.

22. A communication device, characterized in that: A method comprising a module for executing the method of any one of claims 1 to 11; or a method comprising a module for executing the method of any one of claims 12 to 21.

23. A communication device, characterized in that: The method comprises at least one processor, wherein the at least one processor is used to execute the method according to any one of claims 1 to 11, or the at least one processor is used to execute the method according to any one of claims 12 to 21.

24. A chip system, characterized in that: The chip system comprises a processor, and the processor is used to execute the method as claimed in any one of claims 1 to 11; or, the processor is used to execute the method as claimed in any one of claims 12 to 21.

25. A communication system, characterized in that: The communication system comprises a communication device for executing the method according to any one of claims 1 to 11 and a communication device for executing the method according to any one of claims 12 to 21.

26. A readable storage medium, characterized in that: The storage medium stores a computer program or instruction, and when the computer program or instruction is executed by the communication device, it implements the method as described in any one of claims 1 to 11; or, when the computer program or instruction is executed by the communication device, it implements the method as described in any one of claims 12 to 21.

27. A computer program product, characterized in that The computer program product comprises a computer program code, and when the computer program code is executed, the method according to any one of claims 1 to 11 is executed; or when the computer program code is executed, the method according to any one of claims 12 to 21 is executed.

Images