Method for receiving downlink control information, method for transmitting information, and related devices

Abstract

Embodiments of the present application provide a method for receiving downlink control information, a method for transmitting information, and related devices. The method for receiving downlink control information includes: receiving, by a user equipment, first indication information transmitted by a network device, the first indication information indicating that a transmission state identifier of a control resource set corresponds to N candidate reference signals, N being an integer greater than or equal to 1; taking, by the user equipment, any one of the N candidate reference signals as the transmission state identifier of the control resource set; and receiving, by the user equipment, first downlink control information from the control resource set according to the transmission state identifier of the control resource set. The method provided by the embodiments of the present application reduces the resource overhead of receiving downlink control information by receiving N candidate reference signals indicated by the first indication information transmitted by the network device and then selecting any one of the reference signals as the transmission state identifier of the control resource set to receive downlink control information.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of communication, in particular to a method for receiving downlink control information, a method for sending information and related apparatuses. BACKGROUND

[0002] A new radio (NR) system introduces a multicast mechanism (point to multicast, PTM). In order to transmit high-reliability data by using the multicast mechanism, a user equipment receiving the multicast needs to be in a radio resource control (RRC) connected state.

[0003] After the user equipment accesses a service cell and establishes an RRC connection, the user equipment needs to receive downlink control information (DCI) from a common search space (CSS) of a control resource set (CORESET) of the service cell, so as to receive multicast data indicated by the downlink control information.

[0004] How to receive downlink control information by using less resource overhead is a direction that researchers in the field are constantly striving for. SUMMARY

[0005] Embodiments of the present application provide a method for receiving downlink control information, a method for sending information and related apparatuses, aiming to reduce resource overhead for receiving downlink control information.

[0006] In a first aspect, embodiments of the present application disclose a method for receiving downlink control information, the method comprising:

[0007] The user equipment receives first indication information sent by a network equipment, the first indication information indicating that a transmission state identifier of a control resource set corresponds to N candidate reference signals, N being an integer greater than or equal to 1;

[0008] The user equipment uses any one of the N candidate reference signals as the transmission state identifier of the control resource set;

[0009] The user equipment receives first downlink control information from the control resource set according to the transmission state identifier of the control resource set.

[0010] The method for receiving downlink control information provided by embodiments of the present application can be applied to a user equipment, which can be understood as a device capable of data processing and network communication. Exemplarily, the user equipment can include a mobile phone, a portable notebook or a tablet computer, etc., which is not limited by the present application.

[0011] The first indication information can be understood as indicating one or more reference signals for receiving the downlink control information, i.e., indicating that the control resource set is QCL with the N candidate reference signals. Because the N candidate reference signals are not simultaneously transmitted by the serving cell, the control resource set is QCL with the N candidate reference signals at different time periods respectively.

[0012] Any one of the N candidate reference signals can be understood as a signal that enables a certain user equipment to receive the first downlink control information. However, for different user equipments, the user equipment is actually located in different beam coverage ranges of the serving cell, and the user equipment can measure different signal strengths of the N candidate reference signals.

[0013] The method for receiving downlink control information provided by the embodiments of the present application includes that a user equipment receives first indication information transmitted by a network device, the first indication information indicating N candidate reference signals, and N is an integer greater than or equal to 1; when the user equipment needs to update a signal for receiving downlink control information, any one of the N candidate reference signals is automatically selected as a transmission state identifier of a control resource set, so as to receive downlink control information, thereby achieving the purpose of reducing resource overhead for receiving downlink control information.

[0014] In a possible implementation, the user equipment receives the first downlink control information according to a signal with better signal quality in the N candidate reference signals. Exemplarily, the user equipment can perform signal strength detection on the signals in the N candidate reference signals in the current serving cell, and the user equipment receives the first downlink control information by using the signal with better signal quality.

[0015] It can be understood that, except for the signals in the N candidates whose signal quality is lower than or equal to a threshold, the other signals can be understood as signals with better signal quality.

[0016] In a possible implementation, when N is 1, the first indication information is transmitted in a multicast manner; and when N is an integer greater than or equal to 2, the first indication information is transmitted in a unicast or multicast manner.

[0017] In a case where the first indication information indicates that the transmission state identifier of the control resource set corresponds to one candidate reference signal, the first indication information is transmitted in a multicast manner; in a case where the first indication information indicates that the transmission state identifier of the control resource set corresponds to two or more candidate reference signals, the first indication information is transmitted in a unicast or multicast manner. Compared with a case where a unicast manner is used to indicate a signal to a user equipment to receive downlink control information when it is necessary to update the signal for receiving the downlink control information, the manner can reduce resource overhead.

[0018] In a possible implementation, the user equipment uses any one of the N candidate reference signals as the transmission state identifier of the control resource set, including:

[0019] At a first time point, the user equipment uses a first reference signal of the N candidate reference signals as the transmission state identifier of the control resource set;

[0020] The method further includes: at a second time point, the user equipment uses a second reference signal of the N candidate reference signals as the transmission state identifier of the control resource set; and the first reference signal and the second reference signal are different signals of the N candidate reference signals.

[0021] The user equipment receives second downlink control information from the control resource set according to the transmission state identifier of the control resource set.

[0022] In a possible implementation, the user equipment uses any one of the N candidate reference signals as the transmission state identifier of the control resource set, including:

[0023] The user equipment uses a reference signal with the best signal quality of the N candidate reference signals as the transmission state identifier of the control resource set; or

[0024] The user equipment uses a reference signal with a signal quality exceeding a first threshold of the N candidate reference signals as the transmission state identifier of the control resource set; or

[0025] In a case where the signal quality of the N candidate reference signals is all lower than a second threshold, the user equipment selects any one of the candidate reference signals as the transmission state identifier of the control resource set.

[0026] In a possible implementation, the user equipment receives second indication information sent by the network device, where the second indication information indicates that the transmission state identifier of the control resource set corresponds to K candidate reference signals, the K is an integer greater than or equal to 1, and the K candidate reference signals are partially the same as or completely different from the N candidate reference signals.

[0027] In a possible implementation, the method further includes:

[0028] In a case where the signal quality of the N candidate reference signals is all lower than the third threshold, the user equipment sends third indication information to the network equipment; the third indication information indicates that the signal quality of the N candidate reference signals is lower than the threshold.

[0029] In a possible implementation, the third indication information includes Y signals with better signal quality for receiving downlink control information in a serving cell where the user equipment is currently located, and the Y is an integer greater than or equal to 1.

[0030] In a possible implementation, the method further includes:

[0031] In a case where the user equipment receives fourth indication information sent by the network equipment in a multicast manner and fifth indication information sent by the network equipment in a unicast manner at the same time, the user equipment takes a reference signal indicated by the fifth indication information as the transmission state identifier of the control resource set; the fourth indication information indicates that the transmission state identifier of the control resource set corresponds to two or more reference signals; and the fifth indication information indicates that the transmission state identifier of the control resource set corresponds to one reference signal.

[0032] In a possible implementation, the user equipment receives the first downlink control information according to a signal with better signal quality in the N candidate reference signals, including:

[0033] The user equipment receives the first downlink control information according to a signal with the best signal quality in the N candidate reference signals.

[0034] In a possible implementation, the user equipment receives the first downlink control information according to a signal with better signal quality in the N candidate reference signals, including:

[0035] The user equipment receives the first downlink control information according to a signal with better signal quality and contained in the N candidate reference signals in M candidate reference signals; the M candidate reference signals are signals in a serving cell where the user equipment is currently located, and the M is an integer greater than or equal to 1.

[0036] In the implementation, the user equipment directly detects signals in a serving cell where the user equipment is currently located to obtain M candidate reference signals; and then the user equipment receives the first downlink control information according to a signal with better signal quality and contained in the N candidate reference signals in the M candidate reference signals.

[0037] In a possible implementation, the M candidate reference signals are signals used by the user equipment to receive downlink control information in a serving cell currently located by the user equipment.

[0038] In a second aspect, the embodiments of the present application disclose a method for transmitting information, the method comprising:

[0039] The network device transmits first indication information to the user equipment, the first indication information indicating that a transmission state identifier of a control resource set corresponds to N candidate reference signals; any one of the N candidate signals can be used by the user equipment to receive first downlink control information, and N is an integer greater than or equal to 1;

[0040] The network device transmits the first downlink control information to the user equipment.

[0041] The method for transmitting information provided by the embodiments of the present application can be applied to a network device, which can be understood as a device capable of data processing and network communication. Illustratively, the network device can include a base station or an access device of a network, and the present application does not limit this.

[0042] The method for transmitting information provided by the embodiments of the present application, the network device transmits first indication information to the user, the first indication information indicating N candidate reference signals, and N is an integer greater than or equal to 1; since any one of the N candidate signals can be used by the user equipment to receive first downlink control information, that is, the user equipment can receive the first downlink control information through any one of the N candidate reference signals, so that when the user equipment needs to update the signal for receiving the downlink control information, it automatically selects any one of the N candidate reference signals as the transmission state identifier of the control resource set, thereby receiving the downlink control information, achieving the purpose of reducing the resource overhead for receiving the downlink control information; at the same time, reducing the resource overhead in the process of transmitting the signal for the user equipment to receive the downlink control information by the network device.

[0043] In a possible implementation, the first indication information is transmitted in a unicast or multicast manner.

[0044] In a possible implementation, the method further comprises:

[0045] The network device transmits second indication information to the user equipment, the second indication information indicating that the transmission state identifier of the control resource set corresponds to K candidate reference signals; K is an integer greater than or equal to 1; and the K candidate reference signals are partially the same as or completely different from the N candidate reference signals.

[0046] In a possible implementation, the method further includes: receiving, by the network device, third indication information sent by the user equipment, the third indication information indicating that the signal quality of the N candidate reference signals is lower than a threshold.

[0047] In a possible implementation, the third indication information includes Y signals in a serving cell where the user equipment is currently located, the Y signals being better in signal quality and used for receiving downlink control information, and Y being an integer greater than or equal to 1.

[0048] In a third aspect, the embodiments of the present application disclose a user equipment, comprising:

[0049] a receiving unit configured to receive first indication information sent by a network device, the first indication information indicating that a transmission state identifier of a control resource set corresponds to N candidate reference signals, and N being an integer greater than or equal to 1;

[0050] a determining unit configured to determine any one of the N candidate reference signals as the transmission state identifier of the control resource set;

[0051] the receiving unit is configured to receive first downlink control information from the control resource set according to the transmission state identifier of the control resource set.

[0052] In a possible implementation, the first indication information is transmitted in a unicast or multicast manner.

[0053] In a possible implementation, the determining unit is specifically configured to determine a first reference signal in the N candidate reference signals as the transmission state identifier of the control resource set at a first time point;

[0054] the determining unit is further configured to determine a second reference signal in the N candidate reference signals as the transmission state identifier of the control resource set at a second time point, and the first reference signal and the second reference signal being different signals in the N candidate reference signals;

[0055] the receiving unit is further configured to receive second downlink control information from the control resource set according to the transmission state identifier of the control resource set.

[0056] In a possible implementation, the determining unit is specifically configured to determine a reference signal with the best signal quality in the N candidate reference signals as the transmission state identifier of the control resource set; or

[0057] the determining unit is specifically configured to determine a reference signal with a signal quality exceeding a first threshold in the N candidate reference signals as the transmission state identifier of the control resource set; or

[0058] The determination unit is specifically configured to select any candidate reference signal as the transmission state identifier of the control resource set in a case where the signal quality of the N candidate reference signals is all lower than a second threshold.

[0059] In a possible implementation, the receiving unit is further configured to receive second indication information sent by the network device, the second indication information indicating that the transmission state identifier of the control resource set corresponds to K candidate reference signals, the K being an integer greater than or equal to 1, and the K candidate reference signals being partially same as or completely different from the N candidate reference signals.

[0060] In a possible implementation, the user equipment further includes a sending unit configured to send, to the network device, third indication information in a case where the signal quality of the N candidate reference signals is all lower than a third threshold; the third indication information indicating that the signal quality of the N candidate reference signals is lower than the threshold.

[0061] In a possible implementation, the determination unit is further configured to, in a case where the user equipment simultaneously receives fourth indication information sent by the network device in a multicast manner and fifth indication information sent by the network device in a unicast manner, take the reference signal indicated by the fifth indication information as the transmission state identifier of the control resource set; the fourth indication information indicating that the transmission state identifier of the control resource set corresponds to two or more reference signals; and the fifth indication information indicating that the transmission state identifier of the control resource set corresponds to one reference signal.

[0062] In a fourth aspect, an embodiment of the present application discloses a network device, comprising:

[0063] A generating unit is configured to generate first indication information.

[0064] A sending unit is configured to send the first indication information to user equipment, the first indication information indicating that a transmission state identifier of a control resource set corresponds to N candidate reference signals; any signal in the N candidate signals can be used for the user equipment to receive first downlink control information, the N being an integer greater than or equal to 1.

[0065] The sending unit is further configured to send the first downlink control information to the user equipment.

[0066] In a possible implementation, the first indication information is transmitted in a unicast or multicast manner.

[0067] In a possible implementation, the sending unit is further configured to send second indication information to the user equipment, where the second indication information indicates that the transmission state identifier of the control resource set corresponds to K candidate reference signals; K is an integer greater than or equal to 1; and the K candidate reference signals are partially the same as or completely different from the N candidate reference signals.

[0068] In a possible implementation, the network device further includes a receiving unit configured to receive third indication information sent by the user equipment, where the third indication information indicates that the signal quality of the N candidate reference signals is lower than a threshold.

[0069] In a possible implementation, the third indication information includes Y signals in a serving cell of the user equipment that are used to receive the downlink control information and have better signal quality, where Y is an integer greater than or equal to 1.

[0070] In a fifth aspect, an embodiment of the present application discloses a user equipment, including: a processor and a transceiver;

[0071] The transceiver is configured to receive or send a signal; and the processor is configured to execute computer-executed instructions stored in the memory, so that the user equipment performs the method in the first aspect or any possible implementation of the first aspect.

[0072] In a sixth aspect, an embodiment of the present application discloses a network device, including: a processor and a transceiver;

[0073] The transceiver is configured to receive or send a signal; and the processor is configured to execute computer-executed instructions stored in the memory, so that the network device performs the method in the second aspect or any possible implementation of the second aspect.

[0074] In a seventh aspect, an embodiment of the present application discloses a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program runs on one or more processors, causes the method in the first aspect or any possible implementation of the first aspect to be performed; or when the computer program runs on one or more processors, causes the method in the second aspect or any possible implementation of the second aspect to be performed.

[0075] In an eighth aspect, an embodiment of the present application provides a computer program product, the computer program product comprising program instructions, the program instructions, when executed by a processor, causing the processor to perform the method in the first aspect or any possible implementation of the first aspect; or the program instructions, when executed by the processor, causing the processor to perform the method in the second aspect or any possible implementation of the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0076] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the technical solutions in the background art, the drawings needed to be used in the embodiments of the present application or the background art will be briefly introduced as follows.

[0077] Figure 1 is a beam diagram provided by an embodiment of the present application;

[0078] Figure 2 is a schematic diagram of a MAC CE format provided by an embodiment of the present application;

[0079] Figure 3 is a scenario schematic diagram provided by an embodiment of the present application;

[0080] Figure 4 is another scenario schematic diagram provided by an embodiment of the present application;

[0081] Figure 5 is a flowchart of a downlink control information receiving method provided by an embodiment of the present application;

[0082] Figure 6 is a structure schematic diagram of a user equipment provided by an embodiment of the present application;

[0083] Figure 7 is a structure schematic diagram of a network equipment provided by an embodiment of the present application;

[0084] Figure 8 is a structure schematic diagram of a communication apparatus provided by an embodiment of the present application. DETAILED DESCRIPTION

[0085] The terminology used in the following embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in the specification and the appended claims of the present application, the singular forms "a," "an" and "the" are intended to include both the singular and the plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or," as used in the specification and in the claims, is used to mean "one or the other or both" unless otherwise indicated. The terms "first," "second," and the like, as used in the specification and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Unless otherwise defined, all terms used in the specification and the claims are to be interpreted as is customary in the art.

[0086] In order to more clearly describe the solutions of the present application, some knowledge related to the embodiments of the present application is introduced as follows.

[0087] 1. Technical terms

[0088] 1.1. Channel

[0089] A channel is a signal channel based on a transmission medium, and different types of information need to go through different processing processes. For example, the source information of the transmitting end first goes through the processing of the network layer, the data link layer and the physical layer, and then is transmitted to the receiving end through the wireless environment, and finally goes through the entire processing process of the physical layer, the data link layer and the network layer, which is a channel.

[0090] In the new radio system, a channel is divided into a logical channel, a transmission channel and a physical channel. Among them, the physical channel is a channel for actually transmitting information at the physical layer, the transmission channel is a channel between the physical layer and the medium access control (MAC) sublayer, and the logical channel is a channel between the MAC sublayer and the radio link control sublayer (RLC).

[0091] According to the different functions of the channel, each type of channel can be divided into multiple types of channels. For example, the physical channel can be divided into an uplink channel and a downlink channel. The uplink channel includes a physical uplink shared channel (PUSCH) and the like. The downlink channel includes a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) and the like. Among them:

[0092] The PDSCH carries the downlink service data of the user and provides services for the user equipment (UE).

[0093] The PDCCH is used to transmit control information of resource allocation of user data, that is, the PDCCH carries downlink control information (DCI), and the DCI mainly includes PDSCH and PUSCH transmission resource scheduling information, uplink power control indication, and time slot format indication, etc. The PDCCH dynamically sends downlink control information to the user equipment, and the user equipment knows when (time domain) and where (frequency domain) to demodulate the PDSCH and how to demodulate the PDSCH, and when and where to assemble and send the PUSCH data in what way by reading the downlink control information.

[0094] 1.2, Bandwidth Part (BWP)

[0095] In the long term evolution (LTE) system, the maximum transmission bandwidth is 20MHz. Generally, LTE can support multiple working bandwidths, such as 5MHz, 10MHz, and 20MHz. Accordingly, the user equipment needs to support the maximum transmission bandwidth (i.e., 20MHz).

[0096] In the new radio system, the maximum transmission bandwidth supported is 400MHz. If the user equipment adopts the LTE mode, that is, each user equipment supports the maximum transmission bandwidth (i.e., 400MHz), the radio frequency requirement of the user equipment is too high, it is difficult to realize the integration of the chip, and the cost is high.

[0097] In view of the above situation, the bandwidth adaptation (BA) technology can be used to adapt and adjust the working bandwidth of the user equipment for sending and receiving. The bandwidth part is a subset bandwidth of the total bandwidth of the cell, and the same user equipment can work in different bandwidth parts at different times.

[0098] 1.3, Control Resource Set (CORESET) and Search Space

[0099] In the long term evolution (LTE) system, the PDCCH occupies the entire frequency band of the serving cell in the frequency domain, and occupies the first 1 to 3 orthogonal frequency division multiplexing (OFDM) symbols of each subframe in the time domain. That is, the LTE system only needs to inform the user equipment of the number of OFDM symbols occupied by the PDCCH, and the user equipment can determine the search space of the PDCCH.

[0100] In the new radio system, due to the large bandwidth (400MHz) of the system and the difference in terminal demodulation capability, in order to improve the resource utilization, the PDCCH does not occupy the entire bandwidth in the frequency domain; in addition, in order to increase the flexibility of the system to adapt to different scenarios, the starting position of the PDCCH in the time domain can also be configured. That is, the user equipment must know the position of the PDCCH in the frequency domain and the position of the PDCCH in the time domain, in order to further demodulate the PDCCH.

[0101] For convenience, the new radio system encapsulates information such as the frequency band occupied by the PDCCH in the frequency domain and the number of OFDM symbols occupied in the time domain in the control resource set; encapsulates information such as the starting OFDM symbol number of the PDCCH and the PDCCH monitoring period in the search space. Among them:

[0102] The control resource set is a group of physical resources in a specific area of the downlink resource grid, used to carry the PDCCH. The control resource set is configured by parameters corresponding to the search space. Illustratively, the control resource set contains the field CORESET ID, which is used to correspond to the search space.

[0103] The search space is divided into common search space (CSS) and user equipment specific search space (USS). Among them, the common search space is mainly used when the user equipment accesses the cell and performs cell switching, and the common search space is also used for paging and system information corresponding DCI transmission, while the user equipment specific search space is used after the user equipment accesses. According to the different uses of the search space, it can be divided into multiple types. For example, the search space of Type 0-PDCCH in the common search space is used for system message block 1 (SIB1) scheduling.

[0104] The correspondence between the control resource set and the search space is: one control resource set can correspond to multiple search spaces, but one search space can only correspond to one control resource set. At the same time, combined with the parameters in the control resource set and the search space, the user equipment can determine the specific position of the PDCCH in the time and frequency domain.

[0105] 1.4, beam sweeping

[0106] Since the new radio system deploys high frequency (e.g. 6000MHz) signals, the wireless signals exhibit good directivity and large path loss at high frequencies. Therefore, a beam can only cover a limited range. Thus, in the new radio system, only a small cell can contain only one beam, and a large cell generally needs multiple beams to achieve complete coverage. For example, refer to Figure 1 , Figure 1 is a beam map provided by an embodiment of the present application. For a cell composed of multiple beams (e.g. beams 1 to 8 shown), due to hardware limitations, all beams cannot transmit at the same time. Figure 1

[0107] To address the above situation, the new radio system uses beam forming transmission to increase the coverage distance of wireless signals. In addition, since each beam covers a limited angle, the new radio system uses beam sweeping to cover the entire service range of the cell. Beam sweeping is to transmit physical channels or reference signals using beams in different directions at different times, thereby achieving time-sharing transmission of different beams.

[0108] 1.5, Synchronization Signal Block (SSB)

[0109] For a cell in the new radio, synchronization signals are transmitted in a certain period (e.g. 20ms, 40ms or 80ms, etc.) with a duration of 5ms. The synchronization signals include primary synchronization signals (PSS) and secondary synchronization signals (SSS).

[0110] In the new radio system, the synchronization signal block (SSB) is the smallest synchronization unit. The base station can flexibly configure the number of synchronization signal blocks and their positions in the time and frequency domains according to the transmission requirements.

[0111] For example, a cell can transmit one or more synchronization signal blocks (i.e. different beams). For example, cell A transmits 4 synchronization signal blocks SSB, namely SSB0, SSB1, SSB2 and SSB3; cell B transmits 8 synchronization signal blocks, namely SSB0 to SSB7. For a cell with less than or equal to 8 synchronization signal blocks, the user equipment can determine the index of the synchronization signal block by detecting the demodulation reference signal (DM-RS) of the physical broadcast channel.

[0112] ​The synchronization signal block includes a primary synchronization signal and a secondary synchronization signal and a physical broadcast channel (PBCH). Among them:

[0113] The primary synchronization signal and the secondary synchronization signal are used to enable the user equipment to identify the cell identity, and enable the user equipment to obtain symbol-level synchronization.

[0114] The PBCH carries the system parameters of the radio resource control (RRC) layer, other important parameters required for frame synchronization, and parameters required for further decoding other physical channels.

[0115] Specifically, the PBCH contains a master information block (MIB). The master information block contains a field pdcch-configSIB1, which configures the parameters required for decoding the PDCCH corresponding to the system message block 1 (SIB1).

[0116] 2. User equipment access procedure of new radio access system

[0117] In the new radio access system, the base station can configure the user equipment to detect the DCI belonging to itself in one or more control resource sets according to its own radio network temporary identifier (RNTI). For example, for the scenario not considering carrier aggregation, the user equipment works on one carrier, and the base station can configure the user equipment to detect the search space in one or more control resource sets on the carrier, and detect (for example, blind detection) the DCI belonging to itself according to its own radio network temporary identifier, and then receive data or upload data according to the DCI.

[0118] In particular, one user equipment can have one or more radio network temporary identifiers RNTI.

[0119] In particular, for each control resource set, the user equipment needs to know the transmission configuration indicator (TCI) status indicator of the control resource set before detecting the DCI.

[0120] For the same control resource set, the user equipment can detect the DCI located in the common search space and the user equipment specific search space by different detection periods. That is, the user equipment can not need to detect the DCI scrambled by a certain RNTI on a certain search space every time slot, and the network can configure the user equipment to detect the DCI on a certain search space according to a period. For each search space, the number of potential DCIs that the user equipment needs to detect can be one or more, so each search space can be represented by a search space set.

[0121] In R15, the maximum number of control resource sets that can be configured on one active bandwidth part can be 3; the maximum number of search space sets can be 10. Therefore, there can be more than 3 search space sets in one control resource set.

[0122] For the user equipment that initially accesses the service cell and needs to establish an RRC connection, it is necessary to obtain the system message from the initial bandwidth part of the cell. Among them, the system message block 1 (that is, SIB1) is carried by the PDSCH, so the user equipment needs to know the scheduling information of the PDSCH to receive or decode the SIB1, that is, the user equipment needs to monitor the PDCCH carrying the PDSCH scheduling information (which can be understood as the PDCCH corresponding to the SIB1).

[0123] The search space of the PDCCH corresponding to the SIB1 is the common search space, the type is type 0-PDCCH CSS, and the associated control resource set is CORESET0.

[0124] Among them, CORESET0 can be understood as the first control resource set, and its information belongs to part of the configuration information of the initial bandwidth part. As described above (synchronization signal block part), the PBCH in the synchronization signal block includes the master information block (MIB), and the MIB encapsulates the necessary resources for initial access. Specifically, the MIB includes the field pdcch-configSIB1, which configures the data for decoding the PDCCH corresponding to the SIB1: CORESET0 and Type0-PDCCH CSS.

[0125] The process of the user equipment accessing the cell and establishing the RRC connection includes:

[0126] First, the user equipment obtains the system message from the initial bandwidth part of the cell, that is, the user equipment detects the synchronization signal block of the cell located on the initial bandwidth part. The synchronization signal block includes the primary synchronization signal, the secondary synchronization signal and the physical broadcast channel. Among them, the physical broadcast channel carries the MIB, and the MIB contains the configuration information of the control resource set for the user equipment to detect the SIB1, that is, CORESET0.

[0127] The user equipment can obtain a search space for detecting SIB1 through CORESET0, i.e., Type0-PDCCH CSS, which is mapped to CORESET0. Further, the user equipment can obtain other information through SIB1, such as random access configuration, common PDSCH configuration, wireless network identification, etc. The user equipment can be configured in SIB1 to receive a control resource set (such as CORESET1) for paging messages and random access responses, as well as a search space set for paging messages mapped to CORESET1, a search space set for random access. If CORESET1 for paging messages and random access responses is not configured in SIB1, the user equipment can detect the control resource set corresponding to SIB1 to obtain the above information.

[0128] When the user equipment needs to establish an RRC connection, it can select a synchronization signal block whose signal power in the cell exceeds a threshold. For example, the cell has synchronization signal blocks SSB0 to SSB7. The user equipment finds that the synchronization signal blocks exceeding the threshold in the cell are SSB4 and SSB5, and the user equipment can select SSB5.

[0129] Then, the user equipment initiates a random access procedure according to the random access resource corresponding to SSB5 determined by the system message. At this time, the user equipment uses SSB5 as the transmission state identifier of CORESET0 or CORESET1 (CORESET1 network can not be configured).

[0130] In the above case, the user equipment considers that CORESET0 and SSB5 are quasi co-located (QCL), i.e., some channel estimation information obtained by the user equipment through detecting SSB5, such as delay spread and Doppler shift, can be used for receiving CORESET0. The user equipment receives a random access response according to the search space set for random access configured in the system message. Then, the user equipment further obtains an uplink grant through the random access response, and sends a radio resource control (RRC) request to the base station.

[0131] After the base station receives the request, it allocates resources for the user equipment and sends an RRC setup to the user equipment. After the user equipment receives the RRC setup, it sends an RRC setup complete to the base station using the resources configured by the base station. Then, the user equipment enters the RRC connected state.

[0132] After the user equipment enters the connected state, the interaction between the base station and the user equipment can include:

[0133] (1) The base station can configure other control resource sets for the user equipment based on its capabilities and service requirements, as well as search spaces mapped on the other control resource sets.

[0134] (2) The base station can switch the user equipment from an initial bandwidth part (initial BWP) to another bandwidth part through downlink control information.

[0135] (3) The base station can configure the user equipment with another bandwidth part of the cell and a control resource set located on the bandwidth part.

[0136] Correspondingly, the user equipment can acquire RRC information to switch bandwidth parts and obtain multiple control resource set resources.

[0137] For other control resource sets, the base station can modify the transmission state identifier of the control resource set by sending a specific MAC layer control element (MAC CE) to the user equipment.

[0138] For example, the base station can modify the transmission state identifier to a specific channel state information-reference signal (CSI-RS), i.e., the control resource set and the CSI-RS are Gaussian coexistent, and the user equipment receives the corresponding control resource set through the CSI-RS; or the base station can modify the transmission state identifier to a certain synchronization signal block, i.e., the control resource set and the synchronization signal block are Gaussian coexistent, and the user equipment receives the corresponding control resource set through the synchronization signal block.

[0139] In summary, the base station modifies the transmission state identifier of the control resource set through the MAC CE, so that the user equipment can receive the control resource set resource through the correct reference signal (i.e., use the channel estimation information of the reference signal to assist in parsing the PDCCH on the control resource set), and then acquire the DCI.

[0140] Exemplarily, Figure 2 is a schematic diagram of a format of a MAC CE provided by an embodiment of the present application. As Figure 2 indicated, the MAC CE can indicate a service cell identification (ID), a control resource set identification (CORESET ID), and a transmission state identifier in two octets (octets, Oct).

[0141] After a signaling radio bearer is established between the user equipment and the base station and the user equipment completes security mode activation, the base station can establish a data radio bearer with the user equipment, so that the user equipment can carry out services.

[0142] 3. Point to multicast (PTM)

[0143] The new radio system introduces a multicast mechanism. In order to transmit high-reliability data using the multicast mechanism, the user equipment receiving the multicast needs to be in an RRC connected state.

[0144] After multiple user equipments access a service cell and establish RRC connections respectively, the user equipments can learn from system messages of the cell that the cell supports multicast services, and then the user equipments can indicate to the service cell that they expect to carry out multicast services.

[0145] Specifically, the base station configures the user equipments participating in multicast to receive a common search space mapped on the same control resource set, receives DCI from the common search space, and thus receives multicast data indicated by the DCI. In particular, for ease of understanding, the control resource set is denoted as CORESETX, and X can take an integer greater than or equal to 1.

[0146] In the case where the location of the user equipment changes and the user equipment cannot receive CORESETX through the reference signal indicated by the original transmission state identifier, the base station needs to send a MAC CE to each user equipment that needs to modify the transmission state identifier to modify the transmission state identifier of CORESETX. Thus, the user equipment learns to receive DCI from the modified control resource set and the reference signal (such as a certain SSB or CSI-RS) that is Gaussian coexistent with the modified control resource set.

[0147] That is, the base station needs to send a MAC CE to each user equipment that needs to modify the transmission state identifier to modify the transmission state identifier of CORESETX, so that the user equipment knows the reference signal that is Gaussian coexistent with the control resource set QCL, so that the user equipment can receive the control resource set through the signal and thus receive the correct DCI.

[0148] Exemplarily, Figure 3 is a scenario diagram provided by an embodiment of the present application. As Figure 3 shown, the cell has 8 synchronization signal blocks, taking SSB1 to SSB8 as an example. The cell supports multicast services, and the cell configures the control resource set for the user equipment to receive multicast services and the search space mapped on the control resource set.

[0149] For ease of understanding, the control resource set is denoted as CORESETX, and the transmission state identifier of CORESETX is used to indicate to the synchronization signal block. That is, from the perspective of the user equipment, CORESETX is Gaussian coexistent with a certain synchronization signal block, that is, the user equipment can obtain information by detecting the signal block to receive CORESETX, and thus receive the downlink control information.

[0150] As Figure 3As shown, the user equipment 1 is located in the area served by SSB3, and the user equipment 2 is located in the area served by SSB4. After a period of time, the user equipment 1 moves from the area served by SSB3 to the area served by SSB6, and the user equipment 1 will report the change of the synchronization signal block measured by itself to the cell; the user equipment 2 moves from the area served by SSB4 to the area served by SSB5, and the user equipment 2 will also report the change of the synchronization signal block measured by itself to the cell.

[0151] Understandably, when the user equipment measures the change of the synchronization signal block, it will report to the base station, so that the base station can adjust the synchronization signal block corresponding to the multicast service according to the synchronization signal block measured by different user equipment, that is, determine which synchronization signal block in the beam transmits the multicast service.

[0152] For example, before the user equipment moves, the cell uses SSB1 to SSB4 as the CORESET X Gaussian coexistence beam to serve the user equipment inside the cell receiving the multicast service, that is, the user equipment can receive the DCI for carrying out the multicast service by taking any one of SSB1 to SSB4 as the CORESET X Gaussian coexistence signal. After the user equipment moves, the cell needs to use any one of SSB5 to SSB8 as the CORESET X Gaussian coexistence beam to serve the user equipment inside the cell receiving the multicast service according to the information reported by the user equipment.

[0153] In the above case, the base station needs to change the transmission state identifier of the user equipment 1 and the user equipment 2. Specifically, please refer to Figure 4 , Figure 4 is another scenario provided by the embodiment of the application. As shown in part 401 of Figure 4 , the base station sends a MAC CE to the user equipment 1, instructing the user equipment 1 to receive the DCI for carrying out the multicast service through SSB6 (that is, the CORESET X takes SSB6 as the transmission state identifier); as shown in part 402 of Figure 4 , the base station sends a MAC CE to the user equipment 2, instructing the user equipment 2 to receive the DCI for carrying out the multicast service through SSB5, so that the user equipment 1 and the user equipment 2 after the change of the location can receive the DCI for carrying out the multicast service by detecting the correct synchronization signal block.

[0154] It can be understood that there are usually multiple user equipment receiving multicast data in a cell. For example, a service cell can serve tens or hundreds of user equipment to receive multicast data, and the resource overhead is extremely large by updating the state of the control resource set by the above method.

[0155] To solve the above problems, the embodiment of the present application provides a receiving method of downlink control information. The receiving method of downlink control information can be applied to a user equipment. When the user equipment needs to update a reference signal for receiving downlink control information, the user equipment automatically selects a reference signal with better signal quality from a plurality of reference signals for receiving downlink control information sent by a network equipment to receive downlink control information, thereby reducing resource consumption in the process of receiving downlink control information. Correspondingly, the embodiment of the present application provides a sending method of a signal. The sending method of a signal can be applied to a network equipment. In order to facilitate understanding, the above two methods will be explained in combination.

[0156] Specifically, refer to Figure 5 , Figure 5 is a flowchart of a receiving method of downlink control information provided by the embodiment of the present application. As Figure 5 indicated, the receiving method of downlink control information includes:

[0157] 501: The user equipment receives first indication information sent by the network equipment, the indication information indicating that a transmission state identifier of a control resource set corresponds to N candidate reference signals, and the N is an integer greater than or equal to 1.

[0158] The first indication information can be understood as information indicating a plurality of reference signals for receiving downlink control information, that is, indicating that the control resource set (which can be understood as CORESETX in the foregoing) is QCL with the N candidate reference signals, because the N candidate reference signals are not sent by a serving cell at the same time, so the control resource set is QCL with the N candidate reference signals in different time periods.

[0159] That is, the first indication information sent by the network equipment can indicate a plurality of reference signals, and any signal in the plurality of reference signals can be used by the user equipment to receive downlink control information. For example, the first indication information can indicate a synchronization signal block (SSB) or a CSI-RS. Illustratively, the first indication information indicates three synchronization signal blocks: SSB1, SSB2 and SSB3, and the user equipment can use any synchronization signal block to receive downlink control information as long as the signal quality of the SSB detected by the user equipment exceeds a threshold.

[0160] The threshold can be understood as a value for measuring signal quality. Understandably, the threshold can be adjusted according to actual conditions, and the present application does not limit this.

[0161] In some embodiments, the first indication information can indicate identification information of the N candidate reference signals corresponding to the transmission state identifier of the control resource set. Illustratively, the first indication information can include identification information (SSB index) of SSB1, SSB2 and SSB3.

[0162] In particular, the network device generates first indication information, which indicates that the transmission state identifier of the control resource set corresponds to N candidate reference signals, where N is an integer greater than or equal to 1. Then, the network device sends the first indication information to the user device; correspondingly, the user device receives the first indication information sent by the network device.

[0163] It can be understood that the user device can receive the first indication information sent by the network device before it needs to receive the downlink control information corresponding to the multicast service. For example, after the user device indicates to the serving cell where it is located that it expects to carry out the multicast service, the user device needs to receive the downlink control information corresponding to the multicast service (i.e., the downlink control information schedules the transmission of the multicast service) to receive the multicast data; therefore, the user device receives the first indication information sent by the network device before it receives the downlink control information corresponding to the multicast service.

[0164] In some embodiments, the first indication information is transmitted in a unicast or multicast manner.

[0165] It can be understood that before the user device receives the multicast service, the user device can be carrying out unicast service, and the network device can send the first indication information to the user device in a unicast manner, i.e., the network device sends the first indication information to the user device through dedicated signaling. For example, the network device transmits the first indication information in a downlink control information scrambled by the cell radio network temporary identifier (C-RNTI) of the user device, the first indication information is a MAC CE, which is carried on a PDSCH, and the downlink control information indicates the time-frequency resource position of the PDSCH carrying the MAC CE. After the user device receives the multicast service, the network device can send the first indication information to the user device(s) in a multicast manner, which can be sent through the downlink control information scheduling the multicast service (scrambled by G-RNTI), the first indication information is located on the PDSCH time-frequency resource where the multicast service is located at this time, and the network device transmits the multicast data and the first indication information simultaneously through multiplexing.

[0166] 502: The user device uses any one of the N candidate reference signals as the transmission state identifier of the control resource set.

[0167] Any one of the N candidate reference signals can be understood as a signal that enables a certain user device to receive the first downlink control information. However, for different user devices, the user devices are actually located in different beam coverage ranges of the serving cell where they are located, and the user devices can measure different signal qualities of the N candidate reference signals.

[0168] In some embodiments, the user equipment receives the first downlink control information according to a reference signal with better signal quality among the N candidate reference signals. For example, the user equipment can perform signal quality detection on the N candidate reference signals in the serving cell where the user equipment is currently located, and the user equipment receives the first downlink control information by using the reference signal with better signal quality, i.e., receiving the control resource set according to the channel estimation information of the reference signal with better signal quality, and then receiving the first downlink control information in the search space mapped on the control resource set.

[0169] It can be understood that the above-mentioned signal quality can be determined by reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), signal to interference plus noise ratio (SINR), etc., which are not limited in the present application.

[0170] It can be understood that the reference signal with signal quality exceeding the threshold among the N candidate reference signals can be understood as the reference signal with better signal quality. For example, the first indication information indicates that the transmission state identifier of the control resource set corresponds to five candidate reference signals: candidate reference signal A, candidate reference signal B, candidate reference signal C, candidate reference signal D, and candidate reference signal E; the user equipment cannot detect the candidate reference signal A in the serving cell where the user equipment is currently located, and among the other candidate reference signals, the signal quality of the candidate reference signal D is lower than the threshold; therefore, the candidate reference signal B, the candidate reference signal C, and the candidate reference signal E can be understood as the reference signals with better signal quality. Therefore, the user equipment selects any one of the candidate reference signal B, the candidate reference signal C, and the candidate reference signal E to receive the downlink control information.

[0171] Preferably, the user equipment can select the reference signal with the best signal quality among the N candidate reference signals to receive the first downlink control information, i.e., considering that the transmission state identifier of the control resource set corresponds to the reference signal with the best signal quality, and using the reference signal to receive the first downlink control information transmitted on the control resource set.

[0172] 503: The user equipment receives the first downlink control information from the control resource set according to the transmission state identifier of the control resource set.

[0173] In some embodiments, the user equipment receives the first downlink control information according to a reference signal with better signal quality among the N candidate reference signals, comprising:

[0174] The user equipment receives first downlink control information according to a signal of the M candidate reference signals having better signal quality and contained in the N candidate reference signals; the M candidate reference signals are signals in a current serving cell of the user equipment, and M is an integer greater than or equal to 1.

[0175] Specifically, the user equipment can directly detect signals in the current serving cell to obtain the M candidate reference signals; then, the user equipment receives downlink control information according to a signal of the M candidate reference signals having better signal quality and contained in the N candidate reference signals.

[0176] In some embodiments, the M candidate reference signals are signals in the current serving cell that can be used to receive downlink control information. Specifically, the user equipment can directly detect signals in the current serving cell that can be used to receive downlink control information to obtain the M candidate reference signals; then, the user equipment receives downlink control information according to a signal of the M candidate reference signals having better signal quality and contained in the N candidate reference signals.

[0177] In some embodiments, in the case that the signal quality of the N candidate reference signals is all lower than a threshold value, the user equipment selects any one of the candidate reference signals as the transmission state identifier of the control resource set, and then receives downlink control information on the CORESET X according to the channel evaluation information of the selected reference signal.

[0178] In some embodiments, the 502, i.e., the user equipment takes any one of the N candidate reference signals as the transmission state identifier of the control resource set, includes:

[0179] At the first time, the user equipment takes a first reference signal of the N candidate reference signals as the transmission state identifier of the control resource set;

[0180] The method further includes: at the second time, the user equipment takes a second reference signal of the N candidate reference signals as the transmission state identifier of the control resource set; the first reference signal and the second reference signal are different signals in the N candidate reference signals.

[0181] The user equipment receives second downlink control information from the control resource set according to the transmission state identifier of the control resource set.

[0182] Specifically, the user equipment takes different reference signals of the N candidate reference signals as the transmission state identifier of the control resource set CORESET X at different times.

[0183] Exemplarily, at time 1 (which can be understood as the first time point mentioned above), a user equipment can use one of the N candidate reference signals (which can be understood as the first reference signal mentioned above) as the transmission state identifier of the CORESET X to try to parse the downlink control information on the CORESET X, but it can not be successful. At the next time point (for example, time 2, which can be understood as the second time point mentioned above), the user equipment can use another of the N candidate reference signals (which can be understood as the second reference signal mentioned above) as the transmission state identifier of the CORESET X to parse the downlink control information on the CORESET X again. In this way, the success rate of parsing the downlink control information can be improved.

[0184] Understandably, in the case where the state between the user equipment and the network equipment does not change, the user equipment can receive the downlink control information through the signal of the N candidate reference signals indicated by the first indication information multiple times.

[0185] In some embodiments, the network equipment updates the signal of the current serving cell used to receive the downlink control information for multicast data. That is, after the above-mentioned 502, that is, the user equipment receives the first downlink control information according to any one of the N candidate reference signals, and then receives the corresponding data, the user equipment can also receive the second indication information of the network equipment again.

[0186] In some embodiments, the user equipment receives the second indication information sent by the network equipment, and the second indication information indicates that the transmission state identifier of the control resource set corresponds to K candidate reference signals, and the K is an integer greater than or equal to 1.

[0187] Specifically, the network equipment generates the second indication information, and the second indication information indicates that the transmission state identifier of the control resource set corresponds to K candidate reference signals, and the K is an integer greater than or equal to 1. Then, the network equipment sends the second indication information to the user equipment; correspondingly, the user equipment receives the second indication information sent by the network equipment.

[0188] Understandably, the K candidate reference signals are partially the same as or completely different from the aforementioned N candidate reference signals, and the present application does not limit this.

[0189] Understandably, after the network equipment updates the signal of the current serving cell used to receive the downlink control information for multicast data, the network equipment sends the second indication information to the user equipment, so that the user equipment can receive the downlink control information through the correct signal.

[0190] The second indication information can be understood as information indicating a plurality of signals for receiving the downlink control information. That is, the second indication information sent by the network device can indicate a plurality of signals, any one of which can be used by the user equipment to receive the downlink control information. For example, the second indication information can indicate a synchronization signal block (SSB). Exemplarily, the first indication information indicates three synchronization signal blocks: SSB3, SSB4 and SSB5, and the user equipment can use any one of the synchronization signal blocks to receive the downlink control information as long as the signal quality of the synchronization signal block detected by the user equipment exceeds the threshold.

[0191] In some embodiments, the second indication information can include identification information of N candidate reference signals. Exemplarily, the first indication information includes identification information (SSB index) of SSB3, SSB4 and SSB5.

[0192] Correspondingly, after the network device sends the second indication information to the user equipment, the network device can send the second downlink control information to the user equipment.

[0193] In some embodiments, the second indication information is transmitted in a unicast or multicast manner.

[0194] It can be understood that when the user equipment detects that the signal quality of the K candidate reference signals in the serving cell is lower than the threshold, the likelihood of failure is large when using these reference signals as the transmission state identifier of CORESETX and then receiving the downlink control information on CORESETX. Therefore, the user equipment feeds back to the network device through the third indication information so that the network device re-indicates the transmission state identifier for receiving the downlink control information for the user equipment.

[0195] In some embodiments, the third indication information can also include Y reference signals with better signal quality measured by the user equipment in the current serving cell, and Y is an integer greater than or equal to 1.

[0196] Correspondingly, after the network device receives the third indication information sent by the user equipment, the network device can reconfigure the reference signal for the user equipment to receive the second downlink control information. Exemplarily, the network device can reconfigure any one of the Y signals for receiving the second downlink control information, and then the network device sends indication information to the user equipment to indicate the user equipment to select any one of the Y signals to receive the corresponding downlink control information; or the network device directly indicates the user equipment to use signal A to receive the corresponding downlink control information, where signal A can be any one of the Y signals or other signals.

[0197] In some embodiments, in a case where the user equipment simultaneously receives fourth indication information sent by the network equipment through multicast and fifth indication information sent by the network equipment through unicast, the user equipment takes the reference signal indicated by the fifth indication information as the transmission state identifier of the control resource set CORESET X; the fourth indication information indicates that the transmission state identifier of the control resource set corresponds to two or more reference signals; and the fifth indication information indicates that the transmission state identifier of the control resource set CORESET X corresponds to one reference signal.

[0198] The receiving method of the downlink control information provided by the embodiments of the present application is described below in specific scenarios.

[0199] In the new radio system, the scenario in which the user equipment receives multicast data by receiving downlink control information is taken as an example. According to the foregoing description, it can be known that in the multicast mechanism of the new radio system, the network equipment configures the user equipment participating in multicast to receive a common search space mapped on the same control resource set, receives downlink control information from the common search space, and thus receives multicast data indicated by the downlink control information. In particular, CORESET X is taken to represent the control resource set for the convenience of understanding.

[0200] It can be understood that the signal (i.e., any signal in the N candidate reference signals) for receiving the downlink control information can be various, such as a synchronization signal block (SSB) or a CSI-RS, and the present example is illustrated by taking the SSB.

[0201] In the new radio system, the network equipment sends information (i.e., the first indication information, etc.) to the user equipment through a MAC CE to inform the user equipment of the signal for receiving the downlink control information of the multicast data.

[0202] In particular, the receiving method of the downlink control information provided by the embodiments of the present application includes:

[0203] The network equipment uniformly indicates to the user equipment participating in multicast to use SSB5, SSB6, and SSB7 to receive the downlink control information through one MAC CE.

[0204] The MAC CE can be understood as the first indication information; and SSB5, SSB6, and SSB7 can be understood as the N candidate reference signals.

[0205] In particular, the network equipment can send the MAC CE to the user equipment participating in multicast while transmitting multicast services.

[0206] For the user equipment receiving multicast, after obtaining the MAC CE, the user equipment can receive the downlink control information from the signals intersecting SSB5, 6, and 7 in the strongest SSBs measured by the user equipment.

[0207] Alternatively, the user equipment can receive the downlink control information with the SSB with the best signal quality or the strongest power among the SSB5, SSB6 and SSB7 measured by the user equipment.

[0208] For example, the user equipment measures the SSB6 with the highest signal strength, and the user equipment receives the downlink control information according to the SSB6. Specifically, the user equipment detects some channel estimation information such as delay spread and Doppler shift obtained by detecting the SSB6 to receive the CORESETX, receives the downlink control information from the search space mapped to the CORESETX, and further receives the multicast data through the frequency domain resource indicated by the downlink control information.

[0209] The network equipment can reasonably set the MAC CE based on the measurement results of different user equipment, and ensure that the user equipment receiving the multicast can determine the signal for receiving the downlink control information.

[0210] If the signal for receiving the downlink control information obtained by the user equipment through the MAC CE is SSB5, SSB6 and SSB7, but the user equipment finds that the signal quality of them is lower than the threshold, that is, the user equipment cannot accurately receive the downlink control information of the multicast through SSB5, SSB6 and SSB7. At this time, the user equipment can indicate to the network equipment that the signal for receiving the downlink control information is lower than the threshold or needs to be updated. Specifically, the user equipment can report the SSB in the strongest one or more serving cells measured at this time to the network equipment, so that the network equipment adjusts the signal for receiving the downlink control information, that is, adjusts the transmission state identifier of the CORESETX.

[0211] The above describes the method of the embodiments of the present application in detail, and the device of the embodiments of the present application is provided below.

[0212] Please refer to Figure 6 , Figure 6 is a structural schematic diagram of a user equipment provided by the embodiments of the present application. As Figure 6 shown, the above user equipment 60 comprises a receiving unit 601, a determining unit 602, a receiving unit 603 and a sending unit 604, and the description of each unit is as follows:

[0213] The receiving unit 601 is configured to receive the first indication information sent by the network equipment, wherein the first indication information indicates that the transmission state identifier of the control resource set corresponds to N candidate reference signals, and N is an integer greater than or equal to 1.

[0214] The determining unit 602 is configured to take any one of the N candidate reference signals as the transmission state identifier of the control resource set.

[0215] The receiving unit 603 is configured to receive first downlink control information from the control resource set according to the transmission state identifier of the control resource set.

[0216] Optionally, the first indication information is transmitted in a unicast or multicast manner.

[0217] Optionally, the determining unit 602 is specifically configured to use a first reference signal in the N candidate reference signals as the transmission state identifier of the control resource set at a first time point.

[0218] The determining unit 602 is further configured to use a second reference signal in the N candidate reference signals as the transmission state identifier of the control resource set at a second time point; the first reference signal and the second reference signal are different signals in the N candidate reference signals.

[0219] The receiving unit 603 is further configured to receive second downlink control information from the control resource set according to the transmission state identifier of the control resource set.

[0220] Optionally, the determining unit 602 is specifically configured to use a reference signal with the best signal quality in the N candidate reference signals as the transmission state identifier of the control resource set; or

[0221] The determining unit 602 is specifically configured to use a reference signal with a signal quality exceeding a first threshold value in the N candidate reference signals as the transmission state identifier of the control resource set; or

[0222] The determining unit 602 is specifically configured to select any candidate reference signal as the transmission state identifier of the control resource set in a case where the signal qualities of the N candidate reference signals are all lower than a second threshold value.

[0223] Optionally, the receiving unit 603 is further configured to receive second indication information transmitted by the network device, the second indication information indicating that the transmission state identifier of the control resource set corresponds to K candidate reference signals, the K being an integer greater than or equal to 1, and the K candidate reference signals being partially the same as or completely different from the N candidate reference signals.

[0224] Optionally, the user equipment further includes a sending unit 604 configured to send third indication information to the network device in a case where the signal qualities of the N candidate reference signals are all lower than a third threshold value; the third indication information indicating that the signal qualities of the N candidate reference signals are lower than the threshold value.

[0225] Optionally, the determination unit 602 is further configured to, in a case where the user equipment simultaneously receives fourth indication information sent by the network equipment in a multicast manner and fifth indication information sent by the network equipment in a unicast manner, identify the reference signal indicated by the fifth indication information as the transmission state identifier of the control resource set; the fourth indication information indicates that the transmission state identifier of the control resource set corresponds to two or more reference signals; and the fourth indication information indicates that the transmission state identifier of the control resource set corresponds to one reference signal.

[0226] Referring to Figure 7 , Figure 7 is a structural schematic diagram of a network equipment provided by an embodiment of the present application. As shown in Figure 7 , the network equipment 70 comprises a generation unit 701, a sending unit 702, and a receiving unit 703, and the respective units are described as follows:

[0227] The generation unit 701 is configured to generate first indication information.

[0228] The sending unit 702 is configured to send the first indication information to the user equipment, where the first indication information indicates that a transmission state identifier of a control resource set corresponds to N candidate reference signals; any signal in the N candidate reference signals can be used for the user equipment to receive first downlink control information, and N is an integer greater than or equal to 1.

[0229] The sending unit 702 is further configured to send the first downlink control information to the user equipment.

[0230] Optionally, the first indication information is transmitted in a unicast or multicast manner.

[0231] Optionally, the sending unit 702 is further configured to send second indication information to the user equipment, where the second indication information indicates that the transmission state identifier of the control resource set corresponds to K candidate reference signals; K is an integer greater than or equal to 1; and the K candidate reference signals are partially the same as or completely different from the N candidate reference signals.

[0232] Optionally, the network equipment further comprises the receiving unit 703, which is configured to receive third indication information sent by the user equipment, where the third indication information indicates that the signal quality of the N candidate reference signals is lower than a threshold.

[0233] Optionally, the third indication information comprises Y reference signals with better signal quality in a currently served cell measured by the user equipment, and Y is an integer greater than or equal to 1.

[0234] Referring to Figure 8 , Figure 8This is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Figure 8 The communication device 80 shown can be either the user equipment 60 or the network equipment 70 described above.

[0235] like Figure 8 As shown. The communication device 80 includes at least one processor 802, used to implement the functions of the user equipment in the method provided in the embodiments of this application; or, used to implement the functions of the network device in the method provided in the embodiments of this application. The communication device 80 may also include a transceiver 801. The transceiver 801 is used to communicate with other devices / appliances through a transmission medium. The processor 802 uses the transceiver 801 to send and receive data and / or signaling, and is used to implement the methods in the above-described method embodiments.

[0236] Optionally, the communication device 80 may further include at least one memory 803 for storing program instructions and / or data. The memory 803 is coupled to the processor 802. The coupling in this embodiment is an indirect coupling or communication connection between devices, units, or modules, and can be electrical, mechanical, or other forms, used for information exchange between devices, units, or modules. The processor 802 may operate in conjunction with the memory 803. The processor 802 may execute program instructions stored in the memory 803. At least one of the at least one memory may be included in the processor.

[0237] This application embodiment does not limit the specific connection medium between the transceiver 801, processor 802, and memory 803. This application embodiment... Figure 8 The memory 803, processor 802, and transceiver 801 are connected via a bus 804. Figure 8 The connections between other components are shown in bold lines only and are not intended to be limiting. This bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, Figure 8 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0238] In the embodiments of this application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, capable of implementing or executing the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0239] It can be understood that when the communication device 80 is the user equipment 60, the functions of the receiving unit 601, the determining unit 602, the receiving unit 603 and the sending unit 604 are implemented. Alternatively, when the communication device 80 is the network equipment 70, the functions of the generating unit 701, the sending unit 702 and the receiving unit 703 are implemented.

[0240] The application further provides a computer readable storage medium, wherein computer codes are stored in the computer readable storage medium, and when the computer codes are run on a computer, the computer codes make the computer execute the method of the above-mentioned embodiments.

[0241] The application further provides a computer program product, wherein the computer program product comprises computer codes or computer programs, and when the computer codes or computer programs are run on a computer, the method in the above-mentioned embodiments is executed.

[0242] The above is only a specific implementation of the application, but the protection scope of the application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the application, and all the changes or replacements should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the above claims.

Claims

1. A method of receiving downlink control information, characterized by, The method comprises: The user equipment receives first indication information sent by the network equipment, the first indication information indicating that a transmission state identifier of a control resource set corresponds to N candidate reference signals, N being an integer greater than or equal to 1; The user equipment takes any one of the N candidate reference signals as the transmission state identifier of the control resource set; The user equipment receives first downlink control information from the control resource set according to the transmission state identifier of the control resource set.

2. The method of claim 1, wherein, The first indication information is transmitted in a unicast or multicast manner.

3. The method of claim 1, wherein, The user equipment takes any one of the N candidate reference signals as the transmission state identifier of the control resource set, comprising: At a first time, the user equipment takes a first reference signal of the N candidate reference signals as the transmission state identifier of the control resource set; The method further comprises: At a second time, the user equipment takes a second reference signal of the N candidate reference signals as the transmission state identifier of the control resource set; the first reference signal and the second reference signal are different signals in the N candidate reference signals; The user equipment receives second downlink control information from the control resource set according to the transmission state identifier of the control resource set.

4. The method of claim 1, wherein, The user equipment takes any one of the N candidate reference signals as the transmission state identifier of the control resource set, comprising: The user equipment takes a reference signal with the best signal quality in the N candidate reference signals as the transmission state identifier of the control resource set; or, The user equipment takes a reference signal with a signal quality exceeding a first threshold in the N candidate reference signals as the transmission state identifier of the control resource set; or, In the case that the signal quality of the N candidate reference signals is all lower than a second threshold, the user equipment selects any candidate reference signal as the transmission state identifier of the control resource set.

5. The method according to any one of claims 1-4, characterized in that, The method further comprises: The user equipment receives second indication information sent by the network equipment, the second indication information indicating that a transmission state identifier of the control resource set corresponds to K candidate reference signals, K being an integer greater than or equal to 1, and the K candidate reference signals being partially the same or completely different from the N candidate reference signals.

6. The method of claim 1, wherein, The method further comprises: In the case that the signal quality of the N candidate reference signals is all lower than a third threshold, the user equipment sends third indication information to the network equipment; the third indication information indicates that the signal quality of the N candidate reference signals is lower than a threshold.

7. The method as claimed in claim 1, wherein, The method further comprises: In the case that the user equipment simultaneously receives fourth indication information sent by the network equipment in a multicast manner and fifth indication information sent by the network equipment in a unicast manner, the user equipment takes a reference signal indicated by the fifth indication information as the transmission state identifier of the control resource set; the fourth indication information indicates that a transmission state identifier of the control resource set corresponds to two or more reference signals; the fifth indication information indicates that a transmission state identifier of the control resource set corresponds to one reference signal.

8. An information transmitting method characterized by comprising: The method comprises: The network device sends first indication information to the user equipment, the first indication information indicates that a transmission state of a control resource set corresponds to N candidate reference signals; any one of the N candidate reference signals can be used by the user equipment to receive first downlink control information, and N is an integer greater than or equal to 1; The network device sends the first downlink control information to the user equipment.

9. The method of claim 8, wherein, The first indication information is transmitted in a unicast or multicast manner.

10. The method according to claim 8 or 9, characterized in that, The method further comprises: The network device sends second indication information to the user equipment, the second indication information indicates that a transmission state of the control resource set corresponds to K candidate reference signals; K is an integer greater than or equal to 1; the K candidate reference signals are partially the same or completely different from the N candidate reference signals.

11. The method of claim 8, wherein, The method further comprises: The network device receives third indication information sent by the user equipment, the third indication information indicates that the signal quality of the N candidate reference signals is lower than a threshold. 12.A user equipment, comprising: The user equipment comprises: A receiving unit configured to receive first indication information sent by a network device, the first indication information indicates that a transmission state of a control resource set corresponds to N candidate reference signals, and N is an integer greater than or equal to 1; A determining unit configured to use any one of the N candidate reference signals as the transmission state of the control resource set; A receiving unit configured to receive first downlink control information from the control resource set according to the transmission state of the control resource set.

13. A network device, comprising: The network device comprises: A generating unit configured to generate first indication information; A sending unit configured to send the first indication information to the user equipment, the first indication information indicates that a transmission state of a control resource set corresponds to N candidate reference signals, and any one of the N candidate reference signals can be used by the user equipment to receive first downlink control information, and N is an integer greater than or equal to 1; The sending unit is further configured to send the first downlink control information to the user equipment.

14. A user equipment, comprising: Comprise: A processor and a transceiver; The transceiver is configured to receive or send signals; the processor is configured to execute computer execution instructions stored in a memory, so that the user equipment executes the method of any one of claims 1-7.

15. A network device, comprising: Comprise: A processor and a transceiver; The transceiver is configured to receive or send signals; the processor is configured to execute computer execution instructions stored in a memory, so that the network device executes the method of any one of claims 8-11.

16. A computer readable storage medium characterized by: The computer readable storage medium stores a computer program, when the computer program runs on one or more processors, so that the method of any one of claims 1-7 or the method of any one of claims 8-11 is executed.

Images