WO2023273935A1

WO2023273935A1 - Method for receiving downlink control information, method for sending information and related apparatus

Info

Publication number: WO2023273935A1
Application number: PCT/CN2022/099863
Authority: WO
Inventors: 邓云
Original assignee: 展讯通信（上海）有限公司
Priority date: 2021-06-29
Filing date: 2022-06-20
Publication date: 2023-01-05
Also published as: CN115551083A

Abstract

Embodiments of the present application provide a method for receiving downlink control information, a method for sending information, and a related apparatus. The method for receiving downlink control information comprises: a user equipment receives 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, wherein N is an integer greater than or equal to 1; the user equipment uses any one of the N candidate reference signals as the transmission state identifier of the control resource set; and the user equipment receives first downlink control information from the control resource set according to the transmission state identifier of the control resource set. In the method provided in the embodiments of the present application, the user equipment receives N candidate reference signals indicated by the first indication information sent by the network device, and then selects any one of the reference signals as the transmission state identifier of the control resource set, thereby receiving downlink control information, and achieving the purpose of reducing resource overhead for receiving the downlink control information.

Description

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

technical field

The embodiments of the present application relate to the field of communication technologies, and specifically relate to methods for receiving downlink control information, methods for sending information, and related devices.

Background technique

The new radio system (new radio, NR) introduces a multicast mechanism (point to multicast, PTM). In order to transmit highly reliable data using the multicast mechanism, the user equipment receiving the multicast needs to be in a radio resource control (radio resource control, RRC) connected state.

After the user equipment accesses the serving cell and establishes an RRC connection, it needs to receive downlink control information (downlink control information, DCI), so as to receive the multicast data indicated by the downlink control information.

How to receive downlink control information with less resource overhead is a direction that researchers in this field are constantly working on.

Contents of the invention

Embodiments of the present application provide a method for receiving downlink control information, a method for sending information, and related devices, aiming at reducing resource overhead for receiving downlink control information.

In the first aspect, the embodiment of the present application discloses a method for receiving downlink control information, the method includes:

The user equipment receives the first indication information sent by the network device, where the first indication information indicates that the transmission state identifier of the control resource set corresponds to N candidate reference signals, and the above N is an integer greater than or equal to 1;

The user equipment uses 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.

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

The foregoing first indication information may be understood as information indicating one or more reference signals used to receive downlink control information, that is, indicating that the control resource set and the N candidate reference signals are of Gaussian coexistence QCL. Since the N candidate reference signals are not sent by the serving cell at the same time, the control resource set is Gaussianly co-existing with the N candidate reference signals in different time periods.

Any one of the above N candidate reference signals can be understood as a signal that enables a certain user equipment to receive the above-mentioned first downlink control information, but for different user equipments, the location where the user equipment is actually located in the serving cell In different beam coverage areas, the signal strengths of the above N candidate reference signals measured by the user equipment may be different.

In the method for receiving downlink control information provided in the embodiment of the present application, the user equipment receives the first indication information sent by the network equipment, the first indication information indicates N candidate reference signals, and the above N is an integer greater than or equal to 1; in the user equipment When it is necessary to update the signal for receiving downlink control information, any one of the above N candidate reference signals is automatically selected as the transmission status identifier of the control resource set, so as to receive downlink control information and achieve the purpose of reducing the resource overhead of receiving downlink control information .

In a possible implementation manner, the user equipment receives the first downlink control information according to a signal with better signal quality among the N candidate reference signals. Exemplarily, the user equipment may perform signal strength detection on signals among the above N candidate reference signals in the serving cell where it is currently located, and the user equipment uses the signal with better signal quality among them to receive the first downlink control information.

It can be understood that all the signals among the above N candidates except that the signal quality is lower than or equal to the threshold can be understood as signals with better signal quality.

In a possible implementation, when the above-mentioned N is 1, the above-mentioned first indication information is transmitted through multicast; transmission by unicast or multicast.

In the case where the first indication information indicates that the transmission status identifier of the control resource set corresponds to one candidate reference signal, the first indication information is transmitted in a multicast manner; when the first indication information indicates the transmission status of the control resource set In a case where the identifier corresponds to two or more candidate reference signals, the above-mentioned first indication information is transmitted in a unicast or multicast manner. Compared with indicating a certain signal to the user equipment to receive downlink control information in a unicast manner when a signal for receiving downlink control information needs to be updated, the above method can reduce resource overhead.

In a possible implementation manner, the above-mentioned user equipment uses any one of the above-mentioned N candidate reference signals as the transmission state identifier of the above-mentioned control resource set, including:

At the first moment, the user equipment uses the first reference signal among the N candidate reference signals as the transmission status identifier of the control resource set;

The above method further includes: at a second moment, the user equipment uses the second reference signal among the N candidate reference signals as the transmission status identifier of the control resource set; the first reference signal and the second reference signal are the N Different signals in 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.

The user equipment uses the reference signal with the best signal quality among the N candidate reference signals as the transmission status identifier of the control resource set; or,

The user equipment uses one of the N candidate reference signals whose signal quality exceeds the first threshold as the transmission status identifier of the control resource set; or,

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

In a possible implementation manner, the user equipment receives the second indication information sent by the network equipment, 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 greater than or equal to 1 is an integer, the above K candidate reference signals are partly the same as or completely different from the above N candidate reference signals.

In a possible implementation, the above method also includes:

When the signal qualities of the N candidate reference signals are 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 threshold.

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

In a possible implementation, the above method also includes:

When the user equipment receives the fourth indication information sent by the network device through multicast and the fifth indication information sent through unicast at the same time, the user equipment uses the reference signal indicated by the fifth indication information as the above-mentioned The transmission status identifier of the control resource set; the fourth indication information indicates that the transmission status identifier of the control resource set corresponds to two or more reference signals; the fifth indication information indicates that the transmission status identifier of the control resource set corresponds to one reference signal Signal.

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

The user equipment receives the first downlink control information according to the signal with the best signal quality among the N candidate reference signals.

The above user equipment receives the first downlink control information according to the signal quality of the M candidate reference signals that is better and included in the above N candidate reference signals; the above M candidate reference signals are the ones in the serving cell where the above user equipment is currently located signal, the above M is an integer greater than or equal to 1.

In the above implementation manner, the user equipment directly detects the signal of the serving cell where it is currently located to obtain M candidate reference signals; The candidate reference signal is used to receive the first downlink control information.

In a possible implementation manner, the M candidate reference signals are signals for receiving downlink control information in a serving cell where the user equipment is currently located.

In the second aspect, the embodiment of the present application discloses a method for sending information, and the method includes:

The network device sends first indication information to the user equipment, where the first indication information indicates that the transmission state identifier of the control resource set corresponds to N candidate reference signals; any signal in the above N candidate signals can be used by the user equipment to receive the first next Row control information, the above N is an integer greater than or equal to 1;

The foregoing network device sends the foregoing first downlink control information to the foregoing user equipment.

The method for sending information provided in the embodiments of the present application can be applied to network devices, and the foregoing network devices can be understood as devices capable of data processing and network communication. Exemplarily, the foregoing network device may include a base station or a network access device, etc., which is not limited in this application.

In the information sending method provided by the embodiment of the present application, the network device sends the first indication information to the user, the first indication information indicates N candidate reference signals, and the above N is an integer greater than or equal to 1; since the above N candidate signals Any signal of can be used for the user equipment to receive the first downlink control information, that is, the user equipment can receive the above-mentioned first downlink control information through any signal in the N candidate reference signals, so that the user equipment needs to update the method of receiving the downlink control information When receiving a signal, any one of the above N candidate reference signals is automatically selected as the transmission status identifier of the control resource set, so as to receive downlink control information and achieve the purpose of reducing resource overhead for receiving downlink control information; Resource overhead in the process of receiving the downlink control information signal by the user equipment.

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

In a possible implementation, the above method also includes:

The network device sends 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; the above K is an integer greater than or equal to 1; the above K candidate reference signals Partially the same as or completely different from the above N candidate reference signals.

In a possible implementation manner, the method further includes: the network device receiving 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.

In a third aspect, the embodiment of this application discloses a user equipment, including:

The receiving unit is configured to receive first indication information sent by the network device, where the first indication information indicates that the transmission status identifier of the control resource set corresponds to N candidate reference signals, and the above 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 identifier of the control resource set;

The receiving unit is configured to receive the first downlink control information from the control resource set according to the transmission status identifier of the control resource set.

In a possible implementation manner, the determining unit is specifically configured to use the first reference signal among the N candidate reference signals as the transmission status identifier of the control resource set at the first moment;

The determining unit is further configured to use the second reference signal among the N candidate reference signals as the transmission status identifier of the control resource set at the second moment; the first reference signal and the second reference signal are the N candidate reference signals different signals in the reference signal;

The receiving unit is further configured to receive second downlink control information from the control resource set according to the transmission status identifier of the control resource set.

In a possible implementation manner, the above-mentioned determining unit is specifically configured to use the reference signal with the best signal quality among the above-mentioned N candidate reference signals as the transmission state identifier of the above-mentioned control resource set; or,

The determining unit is specifically configured to use one of the N candidate reference signals whose signal quality exceeds the first threshold as the transmission status identifier of the control resource set; or,

The determining unit is specifically configured to select any candidate reference signal as the transmission state identifier of the control resource set when the signal qualities of the N candidate reference signals are all lower than the second threshold.

In a possible implementation manner, the receiving unit is further configured to receive the second indication information sent by the network device, the second indication information indicates that the transmission status identifier of the control resource set corresponds to K candidate reference signals, and the K is An integer greater than or equal to 1, the above K candidate reference signals are partly the same as or completely different from the above N candidate reference signals.

In a possible implementation manner, the user equipment further includes a sending unit, configured to send third indication information to the network device when the signal qualities of the N candidate reference signals are all lower than a third threshold; The three indication information indicate that the signal quality of the N candidate reference signals is lower than the threshold.

In a possible implementation manner, the determining unit is further configured to, when the user equipment simultaneously receives the fourth indication information sent by the network device in a multicast manner and the fifth indication information sent in a unicast manner, The reference signal indicated by the fifth indication information is used as the transmission status identifier of the control resource set; the fourth indication information indicates that the transmission status identifier of the control resource set corresponds to two or more reference signals; the fifth indication information The transmission status identifier indicating the above-mentioned control resource set corresponds to a reference signal.

In a fourth aspect, the embodiment of the present application discloses a network device, including:

a generating unit, configured to generate first indication information;

A sending unit, configured to send first indication information to the user equipment, where the first indication information indicates that the transmission status identifier of the control resource set corresponds to N candidate reference signals; any signal in the above N candidate signals can be used by the user equipment to receive The first downlink control information, the above 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.

In a possible implementation manner, 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; the above K is greater than or an integer equal to 1; the above K candidate reference signals are partly the same as or completely different from the above N candidate reference signals.

In a possible implementation manner, 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.

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

The above-mentioned transceiver is used to receive signals or send signals; the above-mentioned processor is used to execute computer-executable instructions stored in the memory, so that the above-mentioned user equipment executes the first aspect or any one of the possible implementation manners of the first aspect. Methods.

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

The above-mentioned transceiver is used to receive signals or send signals; the above-mentioned processor is used to execute computer-executable instructions stored in the memory, so that the above-mentioned network device executes the second aspect or any one of the possible implementation manners of the second aspect. Methods.

In the seventh aspect, the embodiment of the present application discloses a computer-readable storage medium, in which a computer program is stored in the above-mentioned computer-readable storage medium, and when the above-mentioned computer program is run on one or more processors, the Or the method in any possible implementation manner of the first aspect is executed; or, when the above-mentioned computer program is run on one or more processors, the second aspect or any one of the possible implementations of the second aspect The methods of the embodiments are carried out.

In an eighth aspect, the embodiment of the present application provides a computer program product, the above-mentioned computer program product includes program instructions, and when the above-mentioned program instructions are executed by the processor, the above-mentioned processor executes any one of the first aspect or the first aspect. A method in a possible implementation manner; or, when the above-mentioned program instructions are executed by the processor, the above-mentioned processor executes the method in any one of the possible implementation manners of the second aspect or the second aspect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the following will briefly introduce the drawings that are required in the embodiments of the present application or the background art.

FIG. 1 is a beam diagram provided by an embodiment of the present application;

Fig. 2 is the schematic diagram of the format of a kind of MAC CE that the embodiment of the present application provides;

FIG. 3 is a schematic diagram of a scenario provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of another scenario provided by the embodiment of the present application;

FIG. 5 is a schematic flowchart of a method for receiving downlink control information provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a user equipment provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another user equipment provided by an embodiment of the present application.

detailed description

The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also Plural expressions are included unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used in this application refers to and includes any and all possible combinations of one or more of the listed items. The terms "first" and "second" in the specification, claims and drawings of the present application are used to distinguish different objects, rather than to describe a specific order.

In order to describe the solution of the present application more clearly, some knowledge related to the embodiments of the present application will be introduced below.

1. Technical terms

1.1. Channel

A channel is a signal channel based on a transmission medium, and different types of information need to be processed differently. For example, the source information of the transmitting end is first processed by the network layer, data link layer, and physical layer, and then transmitted to the receiving end through the wireless environment. Finally, the entire processing process of the physical layer, data link layer, and network layer is the channel.

In the new radio system, channels are divided into logical channels, transport channels and physical channels. Among them, the physical channel is the channel through which the physical layer actually transmits information, the transport channel is the channel between the physical layer and the medium access control (MAC) sublayer, and the logical channel is the MAC sublayer and the radio link control sublayer (radio link control, RLC) between channels.

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

The PDSCH carries user downlink service data and provides services for user equipment (user equipment, UE).

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

1.2, bandwidth part (bandwidth part, BWP)

In a long term evolution (long term evolution, LTE) system, the maximum transmission bandwidth is 20MHz. Generally, LTE can support multiple working bandwidths, such as 5MHz, 10MHz, and 20MHz. Correspondingly, the user equipment needs to support the maximum transmission bandwidth (ie 20 MHz).

The maximum transmission bandwidth supported by the new wireless system is 400MHz. If the user equipment adopts the LTE method, that is, each user equipment supports the maximum transmission bandwidth (ie 400MHz), the radio frequency requirements of the user equipment are too high, and it is difficult to realize chip integration. , and the cost is high.

In view of the above situation, a bandwidth adaptation (bandwidth adaptation, BA) technology may 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 may work in different bandwidth parts at different times.

1.3. Control resource set (CORESET) and search space (search space)

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 to say, the LTE system only needs to notify 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.

In the new wireless system, due to the large system bandwidth (400MHz) and the difference in terminal demodulation capabilities, in order to improve 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, the To adapt to different scenarios, the starting position of the PDCCH in the time domain can also be configured. That is to say, the user equipment must know the position of the PDCCH in the frequency domain and the position in the time domain in order to further demodulate the PDCCH.

For convenience, the new wireless 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; information such as the initial OFDM symbol number of the PDCCH and the PDCCH monitoring period are encapsulated in the search space. in:

The control resource set is a group of physical resources in a specific area in the downlink resource grid, and is used to bear the PDCCH. The control resource set corresponds to the search space through parameter configuration. Exemplarily, the control resource set includes a field CORESET ID, which is used to correspond to the search space.

The search space is divided into common search space (common search space, CSS) and user equipment specific search space (user equipment specific search space, USS). Among them, the common search space is mainly used when the user equipment accesses a cell and performs cell handover. The common search space is also used for paging and DCI transmission corresponding to system information, 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 several types. For example, the search space of type 0-PDCCH in the public search space is used for system information block 1 (system information block 1, SIB1) scheduling.

The corresponding relationship 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, by combining the parameters in the control resource set and the search space, the user equipment can determine the specific location of the PDCCH in the time-frequency domain.

1.4, beam sweeping (beam sweeping)

Since the new wireless system adopts high-frequency (for example, 6000MHz) signals for deployment, and wireless signals have the characteristics of good directionality and large path loss at high frequencies, one beam can only cover a limited range. Therefore, in the new wireless system, only a small cell (cell) may contain only one beam, and a larger cell generally requires multiple beams (beams) to achieve complete coverage. For example, please refer to FIG. 1 . FIG. 1 is a beam diagram provided by an embodiment of the present application. For a cell composed of multiple beams (beam 1 to beam 8 shown in FIG. 1 ), due to hardware limitations, all beams cannot transmit at the same time.

In response to the above situation, the new wireless system adopts beam forming (beam forming) transmission to increase the coverage distance of wireless signals. In addition, since the angle covered by each beam is limited, the new wireless system uses beam sweeping to cover the service area of the entire cell. Beam scanning means that at different times, beams in different directions are used to send physical channels or reference signals, thereby realizing time-sharing transmission of different beams.

1.5. Synchronization signal block (SSB)

For a certain cell in the new radio, the synchronization signal is transmitted according to a certain period (such as 20ms, 40ms or 80ms, etc.) with a duration of 5ms. Wherein, the synchronization signal includes a primary synchronization signal (primary synchronization signal, PSS) and a secondary synchronization signal (secondary synchronization signal, SSS).

In the new wireless system, the synchronization signal block (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 domain and frequency domain according to transmission requirements.

Exemplarily, one cell may transmit one or more synchronization signal blocks (ie 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.

The synchronization signal block includes a primary synchronization signal, a secondary synchronization signal and a physical broadcast channel (PBCH). in:

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.

The PBCH carries system parameters of the radio resource control (RRC) layer, other important parameters required to complete frame synchronization, and parameters required to further decode other physical channels.

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

2. The process of user equipment accessing the new wireless access system

In the new wireless access system, the base station can configure the user equipment to detect its own DCI according to its own radio network temporary identifier (RNTI) in one or more control resource sets. For example, for a scenario that does not consider carrier aggregation, the user equipment works on a carrier, the base station can configure the user equipment to detect one or more search spaces in the control resource set on the carrier, and detect (For example, blind detection) belongs to its own DCI, and then receive data or upload data according to the DCI.

In particular, a user equipment may have one or more radio network temporary identifiers RNTI.

In particular, for each control resource set, the user equipment needs to first obtain the transmission status indicator (TCI (transmission configuration indicator) status indicator) of the control resource set when detecting the DCI.

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

In R15 (Release 15), the maximum number of control resource sets that can be configured on an 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.

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

The PDCCH search space corresponding to SIB1 is a common search space, its type is type 0-PDCCH CSS, and its associated control resource set is CORESET 0.

Among them, CORESET 0 can be understood as the first control resource set, and its information is part of the configuration information of the initial bandwidth part. As mentioned above (the part of the synchronization signal block), the PBCH in the synchronization signal block includes a master information block (master information block, MIB), and the MIB encapsulates the necessary resources for initial access. Specifically, the MIB includes the field pdcch-configSIB1, which is configured to decode the data of the PDCCH corresponding to SIB1: CORESET 0 and Type 0-PDCCH CSS.

The process of user equipment accessing a cell and establishing an RRC connection includes:

First, the user equipment obtains system information 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 sync signal block includes a primary sync signal, a secondary sync signal, and a physical broadcast channel. Wherein, the physical broadcast channel bears the MIB, and the MIB includes the configuration information of the control resource set for the user equipment to detect the SIB1, that is, CORESET 0.

The user equipment can obtain the search space for detecting SIB1 through CORESET 0, that is, Type0-PDCCH CSS, and the search space is mapped to CORESET 0. Further, the user equipment can obtain other information through SIB1, such as random access configuration, public PDSCH configuration, wireless network identifier and so on. SIB1 can configure the control resource set (such as CORESET 1) for user equipment to receive paging messages and random access responses, as well as the search space set for paging messages mapped to CORESET 1 and the search space set for random access. If CORESET 1 of paging message and random access response is not configured in SIB1, the user equipment can detect the control resource set corresponding to SIB1 to obtain the above information.

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

Then, the user equipment determines the random access resource corresponding to the SSB5 according to the system information and initiates a random access procedure. At this time, the user equipment uses SSB5 as the transmission status identifier of CORESET 0 or CORESET 1 (CORESET 1 network may not be configured).

In the above case, the user equipment considers that CORESET 0 and SSB5 are Gaussian co-location (Quasi co-location, QCL), that is, some channel evaluation information obtained by the user equipment by detecting SSB5, such as delay spread, Doppler frequency shift, etc., can be used On receiving CORESET 0. The user equipment receives the random access response according to the search space set configured for random access in the system message. Then, the uplink grant is further obtained through the random access response, and a radio resource control RRC request is sent to the base station.

After receiving the request, the base station allocates resources for the user equipment, and sends RRC establishment to the user equipment. After receiving the RRC establishment, the user equipment uses the resources configured by the base station to send the RRC establishment completion to the base station. After that, the user equipment enters the RRC connection state.

After the user equipment enters the connected state, the interaction between the base station and the user equipment may include:

(1) The base station may configure other control resource sets and search spaces mapped on the other control resource sets based on the user equipment's capabilities and service requirements.

(2) The base station can switch the user equipment from the initial bandwidth part (initial BWP) to other bandwidth parts through the downlink control information.

(3) The base station may configure other bandwidth parts of the cell and control resource sets located on other bandwidth parts for the user equipment.

Correspondingly, the user equipment can obtain RRC information, so as to switch bandwidth parts, obtain multiple control resource set resources, and the like.

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 control element, MAC CE) to the user equipment.

For example, the base station may modify the transmission state identifier to be a specific channel state information-reference signal (CSI-RS), that is, the control resource set and the CSI-RS are Gaussian coexistence, 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 be a certain synchronization signal block, that is, the control resource set and the synchronization signal block are Gaussian coexistence, and the user equipment receives the corresponding control resource set through the synchronization signal block.

In short, the base station modifies the transmission status identifier of the control resource set through the MAC CE, so that the user equipment can receive the control resource set resources through the correct reference signal (that is, use the channel evaluation information of the reference signal to assist in parsing the PDCCH on the control resource set), and then obtain to DCI.

Exemplarily, FIG. 2 is a schematic diagram of a format of a MAC CE provided by the embodiment of the present application. As shown in Figure 2, the MAC CE can use two bytes (octet, Oct) to indicate the serving cell identification (identification, ID), control resource set identification (CORESET ID) and transmission status identification.

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

3. Multicast mechanism (point to multicast, PTM)

New wireless systems introduce a multicast mechanism. In order to transmit highly reliable data using the multicast mechanism, the user equipment receiving the multicast needs to be in the RRC connection state.

After multiple user equipments access the serving cell and establish RRC connections respectively, the user equipments can learn from the system information of the cell that the cell supports multicast services, so the user equipments can indicate to the serving cell that they expect to carry out multicast services.

Specifically, the base station configures the user equipments participating in the multicast to receive the common search space mapped on the same control resource set, receive the DCI from the common search space, and thereby receive the multicast data indicated by the DCI. In particular, for the convenience of understanding, the control resource set is represented by CORESET X, where X can be an integer greater than or equal to 1.

When the location of the user equipment changes and cannot receive CORESET X through the reference signal indicated by the original transmission status identifier, the base station needs to send MAC CE to each user equipment that needs to modify the transmission status identifier to modify the transmission of CORESET X Status ID. In this way, the user equipment can learn the reference signal (such as a certain SSB or CSI-RS) that Gaussianly coexists with the modified control resource set when receiving DCI from the modified control resource set.

That is to say, the base station needs to send a MAC CE to each user equipment that needs to modify the transmission status identifier to modify the transmission status identifier of CORESET X, so that the user equipment knows the reference signal that controls the resource set Gaussian coexistence QCL, so that the user equipment can pass this signal Receive the control resource set, and then receive the correct DCI.

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

For the convenience of understanding, the control resource set is recorded as CORESET X, and the transmission status indication of CORESET X to the synchronization signal block is taken as an example for illustration. That is to say, from the perspective of user equipment, CORESET X and a synchronization signal block are Gaussian coexistence, that is, user equipment can receive CORESET X by detecting the signal block to obtain information, and then receive downlink control information.

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

Understandably, when the synchronization signal block measured by the user equipment changes, it will report to the base station. Therefore, 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 in The beams where the synchronization signal blocks are located send multicast services.

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 receiving the multicast service in the cell, that is, the user equipment can use any reference signal from SSB1 to SSB4 as the CORESET X Gaussian coexistence signal to receive DCI for multicast service. After the user equipment moves, according to the information reported by the user equipment in the cell, CORESET X needs to use any reference signal from SSB5 to SSB8 as a Gaussian coexistence beam to serve the user equipment receiving multicast services inside the cell.

In the above situation, the base station needs to change the transmission state identifiers of user equipment 1 and user equipment 2 . Specifically, please refer to FIG. 4 , which is a schematic diagram of another scenario provided by an embodiment of the present application. As shown in part 401 in Figure 4, the base station sends a MAC CE to user equipment 1, instructing user equipment 1 to receive DCI for multicast services through SSB6 (that is, CORESET X uses SSB6 as the transmission status identifier); as shown in part 402 in Figure 4 As shown, the base station sends a MAC CE to user equipment 2, instructing user equipment 2 to receive DCI for multicast service through SSB5, so that user equipment 1 and user equipment 2 can receive and carry out multicast services by detecting the correct synchronization signal block after the location changes. DCI of the broadcast service.

It can be understood that there are usually multiple user equipments receiving multicast data in a cell. For example, a serving cell may serve dozens or hundreds of user equipments to receive multicast data, and updating the state of the control resource set through the above method will cause a huge resource overhead.

In view of the above problems, the embodiment of the present application provides a method for receiving downlink control information. The above method for receiving downlink control information can be applied to user equipment. When the user equipment needs to update the reference signal for receiving downlink control information, it automatically selects the signal with better signal quality among the multiple reference signals for receiving downlink control information sent by the network device to receive the downlink control information, thereby reducing the number of receiving downlink control information. Resource overhead in the information process. Correspondingly, an embodiment of the present application provides a method for sending a signal, and the above method for sending a signal can be applied to a network device. For ease of understanding, the above two methods will be explained in combination next.

Specifically, please refer to FIG. 5 . FIG. 5 is a schematic flowchart of a method for receiving downlink control information provided in an embodiment of the present application. As shown in Figure 5, the method for receiving the downlink control information includes:

501: The user equipment receives first indication information sent by the network device, where the indication information 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.

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 CORESET X in the foregoing) and N candidate reference signals are Gaussian coexistence QCL , because the N candidate reference signals are not sent by the serving cell at the same time, so the control resource set is Gaussianly co-existing with the N candidate reference signals in different time periods.

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

The threshold can be understood as a value to measure the quality of the signal. Understandably, the threshold may be adjusted according to actual conditions, which is not limited in the present application.

In some embodiments, the first indication information may indicate that the transmission state identifier of the control resource set corresponds to identification information of N candidate reference signals. Exemplarily, the first indication information may include identification information (SSB index) of SSB1, SSB2, and SSB3.

Specifically, the network device generates first indication information, where the first indication information 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 equipment; correspondingly, the user equipment receives the first indication information sent by the network device.

Understandably, before the user equipment needs to receive downlink control information corresponding to the multicast service, it may receive the first indication information sent by the network device. For example, after the user equipment indicates to its serving cell that it expects to carry out the multicast service, the user equipment needs to receive the downlink control information corresponding to the multicast service (that is, schedule the transmission of the multicast service through the downlink control information) to receive the multicast data ; Therefore, before receiving the downlink control information corresponding to the multicast service, the user equipment receives the first indication information sent by the network equipment.

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

It can be understood that before the user equipment receives the multicast service, the user equipment may be carrying out unicast (unicast) service, and the network device may send the first indication information to the user equipment in unicast mode, that is, send the first indication information to the user equipment separately through dedicated signaling. The device sends first indication information. If the downlink control information scrambled by the cell wireless network temporary identifier C-RNTI of the user equipment is used to transmit the first indication information, the first indication information is MAC CE, carried on the PDSCH, and the downlink control information indicates the PDSCH carrying the MAC CE The location of the frequency resource. After the user equipment receives the multicast service, the network device can send the first indication information to the (multiple) user equipment in a multicast manner, and can send the second indication information by scheduling the downlink control information of the multicast service (scrambled with G-RNTI). One indication information, 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 simultaneously transmits the multicast data and the first indication information in a multiplexing manner.

502: The user equipment uses any one of the N candidate reference signals as a transmission state identifier of the control resource set.

Any reference signal among the N candidate reference signals may be understood as a signal capable of enabling a certain user equipment to receive the first downlink control information. It is just that for different user equipments, the user equipments are actually located in different beam coverage areas of the serving cells where the user equipments are located, and the signal quality of the N candidate reference signals measured by the user equipments may be different.

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. Exemplarily, the user equipment can perform signal quality detection on the N candidate reference signals in the serving cell where it is currently located, and the user equipment uses the reference signal with better signal quality to receive the first downlink control information, that is, according to the signal quality Preferably, the channel estimation information of the reference signal is used to receive the control resource set, and then receive the first downlink control information in the search space mapped on the control resource set.

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

It can be understood that, among the above N candidate reference signals, the reference signals whose signal quality exceeds the threshold can be understood as signals 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; In the current serving cell, candidate reference signal A cannot be detected, and among other candidate reference signals, the signal quality of candidate reference signal D is lower than the threshold; thus, candidate reference signal B, candidate reference signal C and candidate reference signal E can be understood It is a reference signal with better signal quality. Therefore, the user equipment selects any signal from the candidate reference signal B, the candidate reference signal C and the candidate reference signal E to receive the downlink control information.

Preferably, the user equipment may select the signal with the best signal quality among the above N candidate reference signals to receive the first downlink control information, that is, it considers that the transmission state identifier of the control resource set corresponds to the reference signal with the best signal quality, and uses the reference signal The signal receives the first downlink control information transmitted on the control resource set.

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

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

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

Specifically, the user equipment can directly detect the signal of the serving cell where it is currently located to obtain M candidate reference signals; signal to receive downlink control information.

In some embodiments, the M candidate reference signals are signals that can be used to receive downlink control information in the current serving cell. Specifically, the user equipment can directly detect signals that can be used to receive downlink control information in the current serving cell to obtain M candidate reference signals; And the signals included in the N candidate reference signals are used to receive downlink control information.

In some embodiments, when the signal quality of the N candidate reference signals is lower than the threshold, the user equipment selects any one candidate reference signal as the transmission state identifier of the control resource set, and then according to the selected reference signal Channel assessment information, receive downlink control information on CORESET X.

In some embodiments, the above 502, that is, the user equipment uses any one of the N candidate reference signals as the transmission status identifier of the control resource set, includes:

Specifically, the user equipment uses different reference signals among the N candidate reference signals as the transmission state identifier of the control resource set CORESET X at different times.

Exemplarily, a user equipment can use one of the N candidate reference signals (which can be understood as the first reference signal) as the transmission state identifier of CORESET X at time 1 (which can be understood as the first time mentioned above), trying to Parse the downlink control information on CORESET X, but it may not be successful. At this time, the user equipment can use another reference signal among the N candidate reference signals (can be It is understood as the above-mentioned second reference signal) as the transmission status identifier of CORESET X, and the downlink control information on CORESET X is analyzed again. In this way, the success rate of analyzing downlink control information can be improved.

It can be understood that, in the case that the state between the user equipment and the network equipment does not change, the user equipment may receive downlink control information multiple times through the signals in the N candidate reference signals indicated by the first indication information.

In some embodiments, the network device updates a signal used by the current serving cell to receive downlink control information for carrying out multicast data. That is to say, after the above 502, that is, after 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 may also receive the network device again. Second instruction message.

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

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

It can be understood that the K candidate reference signals are partly the same as or completely different from the aforementioned N candidate reference signals, which is not limited in the present application.

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

The second indication information may be understood as information indicating multiple signals for receiving downlink control information. That is to say, the second indication information sent by the network device may indicate multiple signals, and any signal in the multiple signals may be used for the user equipment to receive downlink control information. For example, the second indication information may 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 downlink control information, as long as the signal quality of the synchronization signal block detected by the user equipment is Threshold exceeded.

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

Correspondingly, after the network device sends the second indication information to the user equipment, the network device may send the second downlink control information to the user equipment.

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

It can be understood that when the user equipment detects that the signal quality of the K candidate reference signals is lower than the threshold in the serving cell, these reference signals are used as the transmission status identification of CORESET X, and then when receiving the downlink control information on CORESET X , the possibility of parsing failure is very high, so the user equipment feeds back to the network equipment through the third indication information, so that the network equipment re-indicates the transmission state identifier for receiving downlink control information for the user equipment.

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

Correspondingly, after the network device receives the third indication information sent by the user equipment, the network device may reconfigure the reference signal for receiving the second downlink control information for the user equipment. Exemplarily, the network device may reconfigure the signal used to receive the second downlink control information as any one of the Y signals, and then, the network device sends indication information to the user equipment to instruct the user equipment to select from the Y signals Select any signal to receive the corresponding downlink control information; or, the network device directly instructs the user equipment to use signal A to receive the corresponding downlink control information, and the signal A can be any signal in the Y signals or other Signal.

In some embodiments, when the user equipment simultaneously receives the fourth indication information sent by the network device through multicast and the fifth indication information sent through unicast, the user equipment uses the reference signal indicated by the fifth indication information As the transmission status identifier of the control resource set CORESET X; the fourth indication information indicates that the transmission status identification of the control resource set corresponds to two or more reference signals; the fifth indication information indicates the transmission status of the control resource set CORESET X The identification corresponds to a reference signal.

The method for receiving downlink control information provided by the embodiment of the present application is described below in a specific scenario.

In the new wireless system, the scenario where the user equipment receives multicast data by receiving downlink control information is taken as an example. According to the previous description, it can be known that in the multicast mechanism of the new wireless system, the network equipment is configured so that the user equipment participating in the multicast receives the common search space mapped on the same control resource set, and receives the downlink control from the common search space. information, so as to receive the multicast data indicated by the downlink control information. In particular, for the convenience of understanding, the control resource set is represented by CORESET X.

It can be understood that there may be multiple signals for receiving downlink control information (that is, any one of the above N candidate reference signals), such as Synchronization Signal Block (SSB) or CSI-RS, etc., and SSB is shown in this example.

In the new wireless system, the network device sends information (ie, the first indication information, etc.) to the user equipment through the MAC CE to inform the user equipment of the downlink control information signal for receiving multicast data.

Specifically, the method for receiving downlink control information provided in the embodiment of the present application includes:

Through a MAC CE, the network device uniformly instructs the user equipment participating in the multicast to use SSB5, SSB6 and SSB7 to receive downlink control information.

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

Specifically, the network device may send the MAC CE to the user equipment participating in the multicast while transmitting the multicast service.

For the user equipment receiving multicast, after obtaining the MAC CE, it can receive the downlink control information from the signals that intersect with SSB5, 6, and 7 among the strongest SSBs measured by itself.

Alternatively, the user equipment may use the SSB with the best signal quality or the strongest power among the SSB5, SSB6 and SSB7 measured by itself to receive the downlink control information.

Exemplarily, the user equipment measures the highest signal strength of SSB6, and the user equipment receives downlink control information according to SSB6. Specifically, the user equipment detects some channel estimation information obtained by detecting SSB6, such as delay spread and Doppler frequency shift, etc., to receive CORESET X, receive downlink control information from the search space mapped to CORESET X, and then pass the downlink The frequency domain resources indicated by the control information receive multicast data.

The network device can reasonably set the MAC CE based on the measurement results of different user equipments, so as to ensure that the user equipments receiving the multicast can all determine to receive the downlink control information signal.

If the signals used to receive downlink control information obtained by the user equipment through the MAC CE are SSB5, SSB6 and SSB7, but the user equipment finds that their signal quality is lower than the threshold, that is, the user equipment cannot accurately receive through SSB5, SSB6 and SSB7 Multicast downlink control information. At this time, the user equipment may indicate to the network equipment that the signal of the received downlink control information is lower than the threshold or needs to be updated. Specifically, the user equipment can report the strongest SSBs in one or more serving cells measured at this time to the network equipment, so that the network equipment can adjust the signal for receiving downlink control information, that is, adjust the transmission status identifier of CORESET X.

The method of the embodiment of the present application has been described in detail above, and the device of the embodiment of the present application is provided below.

Please refer to FIG. 6. FIG. 6 is a schematic structural diagram of a user equipment provided by an embodiment of the present application. As shown in FIG. 6, the user equipment 60 includes a receiving unit 601, a determining unit 602, a receiving unit 603, and a sending unit 604. The description of each unit is as follows:

The receiving unit 601 is configured to receive first indication information sent by the network device, where the first indication information indicates that the transmission state identifier of the control resource set corresponds to N candidate reference signals, and the above N is an integer greater than or equal to 1;

A determining unit 602, configured to use any one of the N candidate reference signals as the transmission state identifier of the control resource set;

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

Optionally, the above-mentioned first indication information is transmitted in a unicast or multicast manner.

Optionally, the determining unit 602 is specifically configured to use the first reference signal among the N candidate reference signals as the transmission state identifier of the control resource set at the first moment;

The above-mentioned determining unit 602 is further configured to use the second reference signal among the above-mentioned N candidate reference signals as the transmission state identifier of the above-mentioned control resource set at the second moment; the above-mentioned first reference signal and the above-mentioned second reference signal are the above-mentioned N different signals among the candidate reference signals;

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

Optionally, the determining unit 602 is specifically configured to use the reference signal with the best signal quality among the N candidate reference signals as the transmission status identifier of the control resource set; or,

The determining unit 602 is specifically configured to use one of the N candidate reference signals whose signal quality exceeds the first threshold as the transmission status identifier of the control resource set; or,

The determining unit 602 is specifically configured to select any candidate reference signal as the transmission state identifier of the control resource set when the signal qualities of the N candidate reference signals are all lower than the second threshold.

Optionally, the receiving unit 603 is further configured to receive second indication information sent by the network device, the second indication information indicates that the transmission state identifier of the control resource set corresponds to K candidate reference signals, and the above K is greater than or equal to is an integer of 1, and the above K candidate reference signals are partly the same as or completely different from the above N candidate reference signals.

Optionally, the user equipment further includes a sending unit 604, configured to send third indication information to the network equipment when the signal qualities of the N candidate reference signals are all lower than a third threshold; the third indication information It indicates that the signal quality of the above N candidate reference signals is lower than the threshold.

Optionally, the determining unit 602 is further configured to: when the user equipment receives the fourth indication information sent by the network device in multicast mode and the fifth indication information sent in unicast mode at the same time, the above-mentioned first The reference signal indicated by the fifth indication information is used as the transmission status identifier of the control resource set; the fourth indication information indicates that the transmission status identifier of the control resource set corresponds to two or more reference signals; the fourth indication information indicates that the control resource set The transmission state identifier of the resource set corresponds to a reference signal.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of the present application. As shown in FIG. 7, the above-mentioned network device 70 includes a generating unit 701, a sending unit 702, and a receiving unit 703. The description of each unit is as follows:

A generating unit 701, configured to generate first indication information;

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

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

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; the above K is greater than or equal to 1 is an integer; the above K candidate reference signals are partly the same as or completely different from the above N candidate reference signals.

Optionally, the network device further includes a receiving unit 703, 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.

Optionally, the third indication information includes Y reference signals with better signal quality in the serving cell where the user equipment is currently located, where Y is an integer greater than or equal to 1.

Please refer to FIG. 8 . FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device 80 shown in FIG. 8 may be the above-mentioned user equipment 60 or the above-mentioned network device 70 .

As shown in Figure 8. The communication device 80 includes at least one processor 802, configured to implement the functions of the user equipment in the method provided in the embodiment of the present application; or, configured to implement the function of the network device in the method provided in the embodiment of the present application. The communication device 80 may also include a transceiver 801 . The transceiver 801 is used to communicate with other devices/devices via transmission media. The processor 802 uses the transceiver 801 to send and receive data and/or signaling, and is used to implement the methods in the foregoing method embodiments.

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 the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. Processor 802 may cooperate with memory 803 . Processor 802 may execute program instructions stored in memory 803 . At least one of the at least one memory may be included in the processor.

In this embodiment of the present application, a specific connection medium among the transceiver 801, the processor 802, and the memory 803 is not limited. In the embodiment of the present application, in FIG. 8, the memory 803, the processor 802, and the transceiver 801 are connected through a bus 804. The bus is represented by a thick line in FIG. 8, and the connection mode between other components is only for schematic illustration. , is not limited. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 8 , but it does not mean that there is only one bus or one type of bus.

In this embodiment of the application, the processor 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 or the like. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

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

Please refer to FIG. 9. FIG. 9 is a schematic structural diagram of another user equipment provided by an embodiment of the present application. As shown in FIG. 9, the user equipment 90 above includes a receiving unit 901, a determining unit 902, and a sending unit 903. The description of each unit is as follows:

The receiving unit 901 is configured to receive first indication information sent by the network device, where the first indication information 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;

A determining unit 902, configured to use any one of the N candidate reference signals as the transmission state identifier of the control resource set;

The receiving unit 901 is further configured to receive first downlink control information from the control resource set according to the transmission status identifier of the control resource set.

Optionally, the determining unit 902 is specifically configured to use the first reference signal among the N candidate reference signals as the transmission state identifier of the control resource set at the first moment;

The above-mentioned determining unit 902 is further configured to use the second reference signal among the above-mentioned N candidate reference signals as the transmission state identifier of the above-mentioned control resource set at the second moment; the above-mentioned first reference signal and the above-mentioned second reference signal are the above-mentioned N different signals among the candidate reference signals;

The receiving unit 901 is further configured to receive second downlink control information from the control resource set according to the transmission status identifier of the control resource set.

Optionally, the determining unit 902 is specifically configured to use the reference signal with the best signal quality among the N candidate reference signals as the transmission status identifier of the control resource set; or,

The determining unit 902 is specifically configured to use one of the N candidate reference signals whose signal quality exceeds the first threshold as the transmission status identifier of the control resource set; or,

The determining unit 902 is specifically configured to select any candidate reference signal as the transmission status identifier of the control resource set when the signal qualities of the N candidate reference signals are all lower than the second threshold.

Optionally, the receiving unit 901 is further configured to receive second indication information sent by the network device, the second indication information indicates that the transmission state identifier of the control resource set corresponds to K candidate reference signals, and the above K is greater than or equal to is an integer of 1, and the above K candidate reference signals are partly the same as or completely different from the above N candidate reference signals.

Optionally, the user equipment further includes a sending unit 903, configured to send third indication information to the network equipment when the signal qualities of the N candidate reference signals are all lower than a third threshold; the third indication information It indicates that the signal quality of the above N candidate reference signals is lower than the threshold.

Optionally, the determining unit 902 is further configured to, when the user equipment receives the fourth indication information sent by the network device in multicast mode and the fifth indication information sent in unicast mode at the same time, use the above-mentioned first The reference signal indicated by the fifth indication information is used as the transmission status identifier of the control resource set; the fourth indication information indicates that the transmission status identifier of the control resource set corresponds to two or more reference signals; the fourth indication information indicates that the control resource set The transmission state identifier of the resource set corresponds to a reference signal.

When the communication device 80 is the above-mentioned user equipment 90, functions of the receiving unit 901, the determining unit 902, and the sending unit 903 are implemented.

The present application also provides a computer-readable storage medium, where computer codes are stored in the computer-readable storage medium, and when the computer codes are run on the computer, the computer is made to execute the methods of the above-mentioned embodiments.

The present application also provides a computer program product, the computer program product includes computer code or computer program, and when the computer code or computer program is run on a computer, the methods in the above embodiments are executed.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the above claims.

Claims

A method for receiving downlink control information, characterized in that the method comprises:

The user equipment receives first indication information sent by the network equipment, where the first indication information 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;

The user equipment uses 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.
The method according to claim 1, wherein the first indication information is transmitted in a unicast or multicast manner.
The method according to claim 2, wherein when the N is 1, the first indication information is transmitted by multicast; when the N is an integer greater than or equal to 2 Next, the first indication information is transmitted in a unicast or multicast manner.
The method according to claim 1, wherein the user equipment uses any one of the N candidate reference signals as the transmission status identifier of the control resource set, including:

At the first moment, the user equipment uses the first reference signal among the N candidate reference signals as the transmission state identifier of the control resource set;

The method also includes:

At the second moment, the user equipment uses the second reference signal among 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 the different signals among 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.
The method according to claim 1, wherein the user equipment uses any one of the N candidate reference signals as the transmission status identifier of the control resource set, including:

The user equipment uses the reference signal with the best signal quality among the N candidate reference signals as the transmission state identifier of the control resource set; or,

The user equipment uses one reference signal whose signal quality exceeds a first threshold among the N candidate reference signals as the transmission status identifier of the control resource set; or,

In the case that the signal qualities of the N candidate reference signals are all lower than the second threshold, the user equipment selects any one candidate reference signal as the transmission state identifier of the control resource set.
The method according to any one of claims 1-5, wherein the method further comprises:

The user equipment receives second indication information sent by the network equipment, where the second indication information indicates that the transmission state identifier of the control resource set corresponds to K candidate reference signals, where K is an integer greater than or equal to 1, The K candidate reference signals are partly the same as or completely different from the N candidate reference signals.
The method according to claim 1, further comprising:

When the signal qualities of the N candidate reference signals are all lower than a third threshold, the user equipment sends third indication information to the network equipment; the third indication information indicates the N candidate reference signals The signal quality is below the threshold.
The method according to claim 1, further comprising:

When the user equipment simultaneously receives the fourth indication information sent by the network device in a multicast manner and the fifth indication information sent in a unicast manner, the user equipment indicates with the fifth indication information The reference signal is used as the transmission status identifier of the control resource set; the fourth indication information indicates that the transmission status identification of the control resource set corresponds to two or more reference signals; the fifth indication information indicates that the control resource A set of transmission state identifiers corresponds to a reference signal.
A method for sending information, characterized in that the method includes:

The network device sends first indication information to the user equipment, where the first indication information indicates that the transmission status identifier of the control resource set corresponds to N candidate reference signals; any signal in the N candidate reference signals can be used for the user equipment receiving first downlink control information, where N is an integer greater than or equal to 1;

The network device sends the first downlink control information to the user equipment.
The method according to claim 9, wherein the first indication information is transmitted in a unicast or multicast manner.
The method according to claim 10, wherein when the N is 1, the first indication information is transmitted by multicast; when the N is an integer greater than or equal to 2 Next, the first indication information is transmitted in a unicast or multicast manner.
The method according to claim 9 or 10, characterized in that the method further comprises:

The network device sends 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; the K is an integer greater than or equal to 1; The K candidate reference signals are partly the same as or completely different from the N candidate reference signals.
The method according to claim 9, characterized in that the method further comprises:

The network device receives third indication information sent by the user equipment, where the third indication information indicates that signal qualities of the N candidate reference signals are lower than a threshold.
A user equipment, characterized in that the device includes:

The receiving unit is configured to receive first indication information sent by the network device, where the first indication information indicates that the transmission status identifier of the control resource set corresponds to N candidate reference signals, where 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 status identifier of the control resource set;

A receiving unit, configured to receive first downlink control information from the control resource set according to the transmission status identifier of the control resource set.
A network device, characterized in that the device includes:

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 indicating that the transmission state identifier of the control resource set corresponds to N candidate reference signals, and any signal in the N candidate reference signals is available When the user equipment receives first downlink control information, the 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.
A user equipment, characterized by comprising: a processor and a transceiver;

The transceiver is configured to receive signals or send signals; the processor is configured to execute computer-executed instructions stored in a memory, so that the user equipment executes the method according to any one of claims 1-8 .
A network device, characterized by comprising: a processor and a transceiver;

The transceiver is configured to receive signals or send signals; the processor is configured to execute computer-executed instructions stored in a memory, so that the network device executes the method according to any one of claims 9-13 .
A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is run on one or more processors, any of claims 1-8 A method according to one or a method according to any one of claims 9-13 is carried out.
A chip, characterized in that the chip is applied to user equipment, and the chip includes one or more processors, and the processors are used to call computer instructions so that the user equipment executes any of the following claims 1-8. one of the methods described.
A chip, characterized in that the chip is applied to a network device, and the chip includes one or more processors, and the processor is used to invoke computer instructions so that the network device performs any of the following claims 9-13. one of the methods described.