WO2018228530A1 - Downlink control channel parameter configuration method, network device and terminal device - Google Patents

Abstract

The present application provides a downlink control channel parameter configuration method, a network device and a terminal device, capable of improving the detection performance of the terminal device to PDCCH. The method comprises: the network device determines a target aggregation level set, the target aggregation level set being a set of target aggregation levels to be used in downlink control channel transmission; and the network device transmits first information to the terminal device, the first information comprising indication information for indicating the target aggregation level set.

Description

Downlink control channel parameter configuration method, network device and terminal device

This application is required to be submitted to the China Patent Office on June 15, 2017, the application number is 201710451517.6, the application name is “configuration method of downlink control channel parameters, network equipment and terminal equipment”, and submitted to the Chinese Patent Office on August 8, 2017. The application No. is the priority of the Japanese Patent Application, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present application relates to the field of communications, and more specifically, to a method for configuring downlink control channel parameters, a network device, and a terminal device.

Background technique

The physical downlink control channel (PDCCH) carries downlink control information (DCI), and the DCI includes resource allocation information of one or more terminal devices and other control information. The terminal device needs to first receive the DCI in the PDCCH, and then can demodulate the data belonging to the terminal device itself at the corresponding resource location.

In a long term evolution (LTE) system, the smallest time scheduling unit is a transmission time interval (TTI) or a subframe of 1 millisecond (ms) time length. In general, there may be multiple PDCCHs within one subframe. The LTE system specifies the aggregation level and the number of candidate PDCCHs (PDCCH candidates) under each aggregation level. The aggregation level indicates the number of Control Channel Elements (CCEs) used by the PDCCH of one terminal device, and the value may be one of 1, 2, 4, and 8. The greater the aggregation level of the PDCCH, the higher the reliability of the transmission. However, the PDCCH occupies more resources, which affects the spectrum efficiency. The smaller the aggregation level of the PDCCH, the less resources are occupied, but the lower the reliability of transmission. The number of candidate PDCCHs at each aggregation level indicates the number of PDCCHs that each terminal device needs to blindly check at each aggregation level. In the actual transmission, the network device selects an aggregation level according to the load size of the DCI and the quality of the wireless channel between the terminal device and the terminal device, and uses the resource corresponding to a candidate PDCCH in the aggregation level to send the DCI to the terminal device. The terminal device needs to perform blind detection on all candidate PDCCHs in all aggregation levels corresponding to the terminal device to detect the PDCCH actually used by the network and obtain the DCI.

Ultra reliable and low latency communications (URLLC) is defined by the international telecommunication union (ITU) for the fifth generation (5G) mobile communication system and future mobile communication systems. Class application scenario. The URLLC service requires high transmission delay and reliability. In order to meet the transmission delay requirement of the URLLC service, the data transmission of the wireless air interface can use a shorter time scheduling unit, for example, using a mini-slot or a larger sub-carrier interval as the smallest time scheduling unit. . Taking the smallest time scheduling unit as a mini time slot as an example, one time slot is divided into multiple mini time slots. At this time, if the blind detection parameter on each mini time slot is the same as the blind detection parameter in the LTE system, then The number of blind detections required by the terminal device in a unit time is multiplied, which may result in the terminal device failing to complete the blind detection of the PDCCH in the mini-slot, and thus cannot correctly receive the PDCCH, and thus cannot satisfy the URLLC service. Transmission delay requirements. Therefore, in order to meet the transmission requirements of the URLLC service or other services, a new mechanism is needed to improve the detection performance of the PDCCH by the terminal device.

Summary of the invention

The present application provides a method for configuring a downlink control channel parameter, a network device, and a terminal device, which can improve the detection performance of the PDCCH by the terminal device.

The first aspect provides a method for configuring a downlink control channel parameter, including: determining, by a network device, a target aggregation level set, where the target aggregation level set is a set of target aggregation levels to be used when transmitting the downlink control channel; The terminal device sends first information, where the first information includes indication information for indicating the target aggregation level set.

The target aggregation level set is a set of target aggregation levels to be used when the downlink control channel is transmitted, and is also a set of target aggregation levels that need to be used when the terminal device blindly detects the downlink control channel. The number of elements included in the target aggregation level set may be the same as or different from the number of elements included in the aggregation level set specified in the prior art. The value of each element in the target aggregation level set may be the same as or different from the aggregation level specified in the LTE system.

Optionally, the target aggregation level set may be a new aggregation level set currently determined by the network device, that is, the terminal device does not currently know any information of the target aggregation level set.

Optionally, the target aggregation level set may be one or more of a plurality of candidate aggregation level sets specified by the protocol, or may be one or more of a plurality of candidate aggregation level sets configured by the network device in advance to the terminal.

Optionally, the network device may determine the target aggregation level set according to one or any combination of the following factors:

The location of the terminal device in the cell served by the network device, the service type/service level/service characteristic supported by the terminal device, the service type/service level/service characteristic of the service to be scheduled by the network device, and the user corresponding to the terminal device Priority, the current air interface load of the network.

The service type can be classified into, for example, a URLLC service and an enhanced mobile broadband (eMBB) service. The service level can be classified according to the reliability requirements and/or the delay requirement. It is divided according to the level of reliability requirements and/or the requirements of delay.

The user priority may refer to the user level information that the terminal device signs when the related service is activated, for example, may be a gold medal user, a silver card user, or a bronze card user. For gold users, you can select a set of aggregation levels with larger element values to improve the reliability of DCI transmission.

The method for configuring the downlink control channel parameters provided by the application, the network device may select an aggregation level set according to actual requirements, and notify the terminal device of the selected aggregation level set, and flexibly adjust the aggregation level set used in the PDCCH transmission to avoid The PDCCH transmission is always performed by using a fixed aggregation level set, and the detection performance of the PDCCH by the terminal device is improved, thereby improving the service transmission performance. The flexibility of adjusting the aggregation level set can effectively adapt the requirements of the terminal equipment to the PDCCH transmission reliability, the air interface transmission efficiency requirement, and the limit requirement of the terminal equipment to the PDCCH blind detection time per unit time, and can be performed between various requirements. Proper compromise.

In a possible implementation manner, the indication information is an index or an identity (ID) of the target aggregation level set.

Since the index or the ID occupies less bits, the signaling overhead can be saved by issuing an index or an ID of the aggregation level set.

Further, the network device sends the first information to the terminal device, where the network device sends the first information to the terminal by using high layer signaling or physical layer signaling (for example, DCI).

In the present application, the high layer signaling may be radio resource control (RRC) signaling or media access control (MAC) layer signaling.

In a possible implementation manner, the indication information is the target aggregation level set.

Further, the network device sends the first information to the terminal device, where the network device sends the first information to the terminal device by using high layer signaling.

Further, the method may further include: the network device receiving feedback information from the terminal device, where the feedback information is used to indicate whether the terminal device correctly receives the first information or is used to indicate that the terminal device has correctly received the first a message.

For example, the feedback information may be an acknowledgement (ACK) message or a negative acknowledgement (NACK) message.

The terminal device sends the feedback information, so that the network device can use the target aggregation and the like after receiving the feedback information, so that the terminal device does not receive the first information, and the target aggregation level set is not yet valid in the terminal device, but the network device When the set of target aggregation or the like is used, the robustness of the configuration process of the downlink control channel parameters can be improved.

In addition, if the terminal device does not receive the first information, the network device may retransmit the first information or retransmit the indication information in the first information.

In a possible implementation manner, the method may further include: the network device transmitting, by using the first target aggregation level in the target aggregation level set, third downlink control information DCI; the network device according to the third DCI Scheduling information for data transmission.

In a possible implementation manner, the first information further includes time information, where the time information is used to indicate an effective time of the target aggregation level set.

Optionally, the effective moment of the target aggregation level set may also be specified by the protocol or configured by the network device. For example, the effective moment of the target aggregation level set may be the start time of the next time unit of the time unit in which the network device transmits the first information or the Tth time unit after the next time unit, where T is a positive integer.

In a possible implementation, the method may further include: the network device sending threshold information to the terminal device, where the threshold information is used to determine candidate downlink control corresponding to each target aggregation level in the target aggregation level set Corresponding relationship between a channel and a plurality of control resource sets CORESET, wherein the correspondence relationship is that one candidate downlink control channel corresponds to one resource in a CORESET or one candidate downlink control channel corresponds to resources in at least two CORESETs.

A second aspect provides a method for configuring a downlink control channel parameter, including: receiving, by a terminal device, first information sent by a network device, where the first information includes indication information indicating a target aggregation level set, and the target aggregation level set A set of target aggregation levels to be used for downlink control channel transmission; the terminal device determines the target aggregation level set according to the first information.

The target aggregation level set is a set of target aggregation levels to be used when the downlink control channel is transmitted, and is also a set of target aggregation levels that need to be used when the terminal device blindly detects the downlink control channel. The number of elements included in the target aggregation level set may be the same as or different from the number of elements included in the aggregation level set specified in the prior art. The value of each element in the target aggregation level set may be the same as or different from the aggregation level specified in the LTE system.

Optionally, the target aggregation level set may be a new aggregation level set currently determined by the network device, that is, the terminal device does not currently know any information of the target aggregation level set.

Optionally, the target aggregation level set may be one or more of a plurality of candidate aggregation level sets specified by the protocol, or may be one or more of a plurality of candidate aggregation level sets configured by the network device in advance to the terminal.

Optionally, the network device may determine the target aggregation level set according to one or any combination of the following factors:

The location of the terminal device in the cell served by the network device, the service type/service level/service characteristic supported by the terminal device, the service type/service level/service characteristic of the service to be scheduled by the network device, and the user corresponding to the terminal device priority. The current air interface load of the network.

The service type can be classified into a URLLC service, an eMBB service, and the like. The service level can be classified according to the reliability requirements and/or the delay requirement. The service characteristics, for example, can also be based on reliability requirements and/or delays. Require high and low to divide.

The user priority may refer to the user level information that the terminal device signs when the related service is activated, for example, may be a gold medal user, a silver card user, or a bronze card user. For gold users, you can select a set of aggregation levels with larger element values to improve the reliability of DCI transmission.

The method for configuring the downlink control channel parameters provided by the application, the network device may select an aggregation level set according to actual requirements, and notify the terminal device of the selected aggregation level set, and flexibly adjust the aggregation level set used in the PDCCH transmission to avoid The PDCCH transmission is always performed by using a fixed aggregation level set, and the detection performance of the PDCCH by the terminal device is improved, thereby improving the service transmission performance. The flexibility of adjusting the aggregation level set can effectively adapt the requirements of the terminal equipment to the PDCCH transmission reliability, the air interface transmission efficiency requirement, and the limit requirement of the terminal equipment to the PDCCH blind detection time per unit time, and can be performed between various requirements. Proper compromise.

In a possible implementation manner, the indication information is an index or an ID of the target aggregation level set.

Since the index or the ID occupies less bits, the signaling overhead can be saved by issuing an index or an ID of the aggregation level set.

In a possible implementation manner, the terminal device receives the first information sent by the network device, where the terminal device receives the first information from the network device by using high layer signaling or physical layer signaling.

In a possible implementation manner, the indication information is the target aggregation level set.

In a possible implementation manner, the terminal device receives the first information from the network device by using high layer signaling.

In the present application, the high layer signaling may be radio resource control (RRC) signaling or media access control (MAC) layer signaling.

In a possible implementation, the method may further include: the terminal device sends feedback information to the network device, where the feedback information is used to indicate whether the terminal device correctly receives the first information or is used to indicate the terminal device The first information has been correctly received.

For example, the feedback information may be a positive acknowledgement ACK message or a negative acknowledgement NACK message.

The terminal device sends the feedback information, so that the network device can use the target aggregation and the like after receiving the feedback information, so that the terminal device does not receive the first information, and the target aggregation level set is not yet valid in the terminal device, but the network device When the set of target aggregation or the like is used, the robustness of the configuration process of the downlink control channel parameters can be improved.

In addition, if the terminal device does not receive the first information, the network device may retransmit the first information or retransmit the indication information in the first information.

In a possible implementation manner, the method may further include: the terminal device detecting, by the network device, third downlink control information DCI transmitted by using the first target aggregation level in the target aggregation level set; The scheduling information carried in the three DCIs receives the data sent by the network device.

In a possible implementation manner, the first information further includes time information, where the time information is used to indicate an effective time of the target aggregation level set.

Optionally, the effective moment of the target aggregation level set may also be specified by the protocol or configured by the network device. For example, the effective moment of the target aggregation level set may be the start time of the next time unit of the time unit in which the network device transmits the first information or the Tth time unit after the next time unit, where T is a positive integer.

In a possible implementation, the method may further include: the terminal device receiving threshold information from the network device; and determining, by the terminal device, the candidate downlink control corresponding to each target aggregation level in the target aggregation level set according to the threshold information. Corresponding relationship between a channel and a plurality of control resource sets CORESET, wherein the correspondence relationship is that one candidate downlink control channel corresponds to one resource in a CORESET or one candidate downlink control channel corresponds to resources in at least two CORESETs.

In a third aspect, a network device is provided for performing the method of the first aspect or any possible implementation of the first aspect. In particular, the network device comprises means for performing the method of the first aspect or any of the possible implementations of the first aspect.

In a fourth aspect, a terminal device is provided for performing the method of any of the second aspect or the second aspect. In particular, the terminal device comprises means for performing the method of any of the second aspect or any of the possible implementations of the second aspect.

In a fifth aspect, a network device is provided, the network device comprising a transceiver, a memory, and a processor, the memory for storing a computer program, the processor for calling and running the computer program from the memory, such that the processor executes The method of any of the above first aspect and any possible implementation of the first aspect.

In a sixth aspect, a terminal device is provided, the terminal device comprising a transceiver, a memory and a processor, the memory for storing a computer program, the processor for calling and running the computer program from the memory, such that the processor executes The method of any of the above second aspect and any possible implementation of the second aspect.

In a seventh aspect, a computer readable storage medium is provided for storing a computer program, the computer program comprising instructions for performing the methods of the above aspects and any of the possible implementations of the above aspects.

In an eighth aspect, a computer program product comprising instructions, when executed on a computer, causes the computer to perform the methods of the above aspects and any of the possible implementations of the various aspects described above.

DRAWINGS

1 is a schematic diagram of a system architecture applied to the present application.

2 is a schematic flowchart of a method for configuring downlink control channel parameters according to the present application.

3 is a schematic block diagram of a network device in accordance with the present application.

4 is a schematic block diagram of a terminal device according to the present application.

FIG. 5 is a schematic block diagram of another network device in accordance with the present application.

FIG. 6 is a schematic block diagram of another terminal device according to the present application.

detailed description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a mobile communication system to which an embodiment of the present application is applied. As shown in FIG. 1, the mobile communication system includes a core network device 110, an access network device 120, and at least one terminal device (such as the terminal device 130 and the terminal device 140 in FIG. 1). The terminal device is connected to the access network device 120 in a wireless manner, and the access network device 120 is connected to the core network device 110 by wireless or wired. The core network device 110 and the access network device 120 may be independent physical devices, or may integrate the functions of the core network device 110 with the logical functions of the access network device on the same physical device, or may be a physical device. The functions of part of the core network device 210 and the functions of the part of the access network device 120 are integrated on the device. The terminal device can be fixed or mobile. FIG. 1 is only a schematic diagram, and the communication system may further include other network devices, such as a wireless relay device and a wireless backhaul device (not shown in FIG. 1). The embodiment of the present application does not limit the number of core network devices, access network devices, and terminal devices included in the mobile communication system.

The access network device 120 is an access device that the terminal device accesses to the mobile communication system by using a wireless device. The access network device 120 may be a base station (node B, NB), an evolved base station (evolutional node B, eNB), A base station in a 5G mobile communication system, a base station in a new radio (NR) communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc., embodiments of the present application are directed to a radio access network device. The specific technology and specific equipment form adopted are not limited. Unless otherwise stated, the expressions of the 5G system and the NR system are interchangeable in this application.

The terminal device may also be called a terminal, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), or the like. The terminal device can be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, industrial control (industrial control) Wireless terminal, wireless terminal in self driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless in transport safety A terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.

Access network equipment and terminal equipment can be deployed on land, indoors or outdoors, hand-held or on-board; they can also be deployed on the water; they can also be deployed on airborne aircraft, balloons and satellites. The application scenarios of the access network device and the terminal device are not limited in the embodiment of the present application.

The access network device and the terminal device and between the terminal device and the terminal device can communicate through a licensed spectrum, or can communicate through an unlicensed spectrum, or can simultaneously pass the licensed spectrum and the license-free. The spectrum communicates. The access network device and the terminal device and the terminal device and the terminal device can communicate through a spectrum of 6 gigahertz (GHz) or less, or can communicate through a spectrum of 6 GHz or higher, and can also use a frequency below 6 GHz. The spectrum communicates with the spectrum above 6 GHz. The embodiment of the present application does not limit the spectrum resources used between the access network device and the terminal device.

In order to facilitate the understanding of the present application, the concepts or terms that will be referred to in the present application are first described before introducing the method for configuring the downlink control channel parameters provided by the present application, but this is not intended to limit the present application.

1) Aggregation level:

Indicates the number of Control Channel Elements (CCEs) used by one PDCCH. The CCE is a basic unit of the control channel physical resource. A CCE is composed of at least two resource element groups (REGs), and one REG is composed of at least two resource elements (RE elements). The RE consists of one subcarrier within a time domain symbol and is the smallest physical time-frequency resource in the LTE system and the NR system.

In the LTE system, the value of the aggregation level may be one of 1, 2, 4, and 8. In the NR system, the value of the aggregation level may also be 16 and 32. The network device can determine the aggregation level of the PDCCH according to factors such as the size of the DCI payload and the quality of the radio channel. The larger the DCI load is, the larger the aggregation level of the corresponding PDCCH is. The worse the radio channel quality is, the larger the aggregation level of the required PDCCH is to ensure the transmission quality of the PDCCH.

In the LTE system, each CCE is composed of 9 REGs, and each REG contains 4 available resource elements (REs). In the NR system, each CCE is composed of 6 REGs, and one resource block (RB) in an orthogonal frequency division multiplexing (OFDM) symbol constitutes one REG.

2) Candidate PDCCH (PDCCH Candidate):

To reduce the complexity of blind detection of terminal equipment, the system defines a series of resource locations that may occur in the PDCCH for each aggregation level. These resource locations are called candidate PDCCHs (PDCCH Candidate). The PDCCH Candidates set that the terminal device needs to detect is called a search space. The PDCCH Candidates set corresponding to a certain aggregation level is called the search space under the aggregation level. The LTE system requires each terminal device to blindly detect multiple candidate PDCCHs at each aggregation level.

3) Common search space and user specific (UE specific) search space:

In the LTE system, the common search space is mainly used for transmitting PDCCHs corresponding to public information such as a broadcast channel (BCH) and a paging channel (PCH). Since it is for all terminal devices in the cell, the aggregation level is Only 4 and 8. A large aggregation level means that there are many physical resources and a low code rate, which can be received by all terminal devices in the cell. The user equipment-specific search space is mainly used for transmitting the PDCCH corresponding to the terminal device-specific data, and the aggregation level may be 1, 2, 4, and 8, and the network device may be configured according to the downlink physical channel quality of the terminal device and the number of terminal devices scheduled in the current subframe. A number of factors are chosen to select the appropriate aggregation level for transmission of DCI. The public search space and the user device specific search space may overlap.

Table 1 shows the correspondence between the aggregation level L, the number of available CCEs (or the search space size), and the number of candidate PDCCHs M ^(L) to be monitored in a given search space in the LTE system:

Table 1

It can be seen that under different aggregation levels, the size of the search space is different, and the number of candidate PDCCHs is also different. The number of CCEs included in the search space at a certain aggregation level is the product of the aggregation level and the number of candidate PDCCHs under the aggregation level.

4) Downlink control channel:

The downlink control channel involved in the present application may be used to carry downlink control information, where the downlink control information includes resource scheduling information and other control information, for example, the control channel may be a PDCCH, an enhanced physical downlink control channel (EPDCCH). ), a new radio physical downlink control channel (NR-PDCCH), and other downlink channels having the above functions defined as the network evolves. For convenience of description in the present application, only the PDCCH is taken as an example for description. It should be understood that the channel may also be called a signal or the rest of the name, which is not specifically limited in the embodiment of the present invention.

5) Aggregation level set:

Includes one or more elements, each corresponding to an aggregation level. For example, the aggregation level set is {1, 2, 8}, indicating that the network device can use one of the aggregation levels 1, 2, and 8 when transmitting the PDCCH, and the terminal device needs to blindly detect the candidate corresponding to the aggregation levels 1, 2, and 8. PDCCH.

The number of candidate PDCCHs corresponding to the aggregation level in the aggregation level set may be referred to the existing LTE regulations, or may be referred to the NR system. This application does not limit this.

It should be understood that the target aggregation level set, the first aggregation level set, and the like described hereinafter may all be referred to the description of the aggregation level set herein, and the corresponding or identical concepts will not be described in detail below.

In the prior art, the LTE system is used as an example. Before the network device and the terminal device perform data transmission, the network device transmits the DCI by using an aggregation level specified by the LTE system. The terminal device needs to blindly detect the PDCCH to acquire the DCI, and receive the downlink data on the physical downlink share channel (PDSCH) according to the indication of the DCI. For the terminal device, the number of CCEs used by the network device to transmit the PDCCH is changed and there is no signaling, so the terminal device has to perform blind detection on all candidate PDCCHs under all possible aggregation levels in the aggregation level set. The blind detection complexity of the blind detection of the PDCCH by the terminal device is determined by the blind detection parameter, and the blind detection parameter includes the set of aggregation levels that the terminal device needs to detect and the number of candidate PDCCHs in each aggregation level in the aggregation level set.

In order to meet the transmission delay requirement of the URLLC service, the data transmission of the wireless air interface can use a shorter time scheduling unit, for example, using a mini-slot or a larger sub-carrier interval as the smallest time scheduling unit. . Taking the smallest time scheduling unit as a mini time slot as an example, one time slot is divided into multiple mini time slots. At this time, if the blind detection parameter on each mini time slot is the same as the blind detection parameter in the LTE system, then The number of blind detections required by the terminal device in a unit time is multiplied, which may result in the terminal device failing to complete the blind detection of the PDCCH in the mini-slot, and thus cannot correctly receive the PDCCH, and thus cannot satisfy the URLLC service. Transmission delay requirements. If the total number of blind checks on each time slot is kept as constant as possible, the number of blind checks performed by the terminal device on each mini-slot will be reduced by a factor of two. To reduce the number of blind checks on each minislot, this can be achieved by reducing the aggregation level or reducing the number of candidate PDCCHs per aggregation level. However, reducing the number of candidate PDCCHs per aggregation level affects the flexibility of network scheduling and improves the blocking probability. In addition, considering the reliability requirements of the URLLC service, the network device can use a larger aggregation level for DCI transmission. Therefore, in order to improve the blind detection speed of the terminal device, the network device can perform DCI transmission using only a large aggregation level. However, since the network device transmits DCI, it is necessary to comprehensively consider various factors, such as the load size of the DCI, the quality of the wireless channel between the network device and the terminal device, and the number of terminal devices that are accessed, so that the network device cannot always be guaranteed. DCI can be transmitted using a larger aggregation level.

In view of this, the present application provides a method for configuring a downlink control channel parameter, and the network device may select an aggregation level set according to actual requirements, and notify the terminal device of the selected aggregation level set, and flexibly adjust the PDCCH transmission. The aggregation level set improves the detection performance of the PDCCH by the terminal device, thereby improving the service transmission performance.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the “first”, “second” and the like in the embodiments of the present application are only used to distinguish the description, and should not be construed as limiting the invention. For example, the first aggregation level set and the second aggregation level set are only for distinguishing between different sets of aggregation levels that may be different.

FIG. 2 is a schematic flowchart of a method for configuring downlink control channel parameters according to an embodiment of the present invention. The network device in FIG. 2 may be the radio access network device 120 in FIG. 1, and the terminal device in FIG. 2 may be the terminal device 130 or the terminal device 140 in FIG. As shown in FIG. 2, the method 200 includes:

S210. The network device determines a target aggregation level set.

The target aggregation level set is a set of target aggregation levels to be used when the downlink control channel is transmitted, and is also a set of target aggregation levels that need to be used when the terminal device blindly detects the downlink control channel. For example, the target aggregation level set is {4, 8}, which indicates that the network device can use one of the aggregation levels 4 and 8 when transmitting the PDCCH, and the terminal device needs to blindly detect the candidate PDCCH corresponding to the aggregation level 4 and the aggregation level 8 Corresponding candidate PDCCH.

The number of elements included in the target aggregation level set may be the same as or different from the number of elements included in the aggregation level set (for example, {1, 2, 4, 8}) specified in the prior art. The value of each element in the target aggregation level set may be the same as the aggregation level specified in the LTE system, or may be different. For example, the target aggregation level can be {1, 2, 8}, {8, 16}, and the like. The number of elements included in the target aggregation level set, and the value of each element, may be determined on a case-by-case basis.

Alternatively, the network device may determine the target aggregation level set based on one or a combination of the following factors.

Factor 1: The location of the terminal device in the cell served by the network device.

For example, a terminal device located at a cell edge and a terminal device located at a non-cell edge may adopt different aggregation level sets, and the network device may determine a target aggregation level set according to whether the terminal device is at an edge of a cell. In a specific implementation, the terminal device may measure the interference of the neighboring cell and report the measurement result to the network device. The network device determines, according to the measurement result reported by the terminal device, whether the terminal device is at the cell edge, and determines the target aggregation level set according to the determination result. For example, when the terminal device is at the cell edge, the channel quality may be poor. When the network device performs DCI transmission, a larger aggregation level may be used. Therefore, the network device may determine the aggregation level set with a larger element value (ie, a higher aggregation level) as the target aggregation level set; and if the terminal device is located at the non-cell edge position, the channel quality may be better, and the network device is performing DCI. When sending, a smaller aggregation level may be used. Therefore, the network device can determine the aggregation level set with a smaller element value (ie, a smaller aggregation level) as the target aggregation level set.

Factor 2: The service type, service level, or service characteristics of the service supported by the terminal device and/or the network device to be scheduled.

The service type can be classified into a URLLC service, an eMBB service, and the like. The service level can be classified according to the reliability requirements and/or the delay requirement. The service characteristics, for example, can also be based on reliability requirements and/or delays. Require high and low to divide.

For example, when accessing the network, the terminal device can interact with the network device for the service type or service characteristic of the service supported by the terminal device. The network device may determine the target aggregation level set according to the service type or service characteristic of the service supported by the terminal device. For example, if the service type of the service supported by the terminal device is a URLLC service, or the service characteristics of the supported service are low latency and high reliability, the network device may have a small number of elements and a large element value. The aggregation level set is determined as the target aggregation level set.

Factor 3: User priority corresponding to the terminal device.

The user priority may refer to the user level information that the terminal device signs when the related service is activated, for example, may be a gold medal user, a silver card user, or a bronze card user. For gold users, you can select a set of aggregation levels with larger element values to improve the reliability of DCI transmission.

Factor 4: The current air interface load of the network.

When the network air interface load is high, in order to improve the transmission efficiency of the air interface, a set of aggregation levels with smaller element values may be selected.

Optionally, the target aggregation level set may be a new aggregation level set currently determined by the network device, that is, the terminal device does not currently know any information of the target aggregation level set.

Optionally, the target aggregation level set may be one or more of a plurality of candidate aggregation level sets specified by the protocol, or may be one or more of a plurality of candidate aggregation level sets configured by the network device in advance to the terminal.

In one possible design, the network device can communicate with the terminal device through an aggregation level in the default aggregation level set to configure a plurality of candidate aggregation level sets to the terminal device. The default aggregation level set, for example, may be defined as: an aggregation level configured by the network device when the terminal device accesses the network and a candidate PDCCH to be detected under each aggregation level.

Specifically, the network device may send the DCI to the terminal device by using a certain aggregation level in the default aggregation level set, where the DCI may schedule a physical downlink shared channel (PDSCH), and the network device may be in the first The plurality of candidate aggregation level sets are carried in the PDSCH. The terminal device blindly checks the DCI by using a default aggregation level set, and the DCI can receive the multiple candidate aggregation level sets carried in the first PDSCH on the first PDSCH.

In another possible design, the network device can configure the plurality of candidate aggregation level sets to the terminal device by communicating with the terminal device through an aggregation level in the aggregation level set currently being used.

The set of aggregation levels currently being used by the network device may be one of several aggregation level sets configured by the network device to the terminal device. That is, the network device can continually update the set of candidate aggregation levels configured for the terminal. In this case, the network device may also configure an effective time of the updated candidate aggregation level set, or specify an effective time of the updated candidate aggregation level set by the protocol. For example, after the network device sends the updated start aggregation level set, the next time unit start time or the T time unit after the next time unit, the updated candidate aggregation level set takes effect, and the network device is configured before. The set of candidate aggregation levels will be invalid, where T is a positive integer.

In the present application, the time unit may be a subframe, a time slot, a mini-slot, or a time unit defined in 5G and a future network system, and the time unit is not specifically limited in this application.

S220. The network device sends first information, where the first information includes indication information for indicating a target aggregation level set. Correspondingly, the terminal device receives the first information.

S230. The terminal device determines, according to the indication information, the target aggregation level set.

Specifically, after determining the target aggregation level set, the network device, by sending the indication information in the first information, indicates, to the terminal device, the target aggregation level set determined by the network device. After receiving the first information, the terminal device may determine the target aggregation level set according to the indication information in the first information.

Optionally, the indication information may be the target aggregation level set, that is, the network device directly sends the target aggregation level set.

Further, the network device may send the first information to the terminal device by using high layer signaling. The second DCI used to schedule the high layer signaling is transmitted using a second aggregation level in the second aggregation level set. In the present application, the high layer signaling may be RRC signaling or MAC layer signaling.

Specifically, the high layer signaling carries the first information. The high layer signaling may be carried on the PDSCH, and the terminal device needs to first blindly check the DCI for scheduling the PDSCH (for example, as the second DCI), and then can demodulate the upper layer signaling in the corresponding resource location. a message. In this embodiment, the second DCI may be transmitted using one of the second aggregation level sets (eg, referred to as the second aggregation level). The terminal can blindly detect the second DCI according to the second aggregation level set, so that the first information in the high layer signaling can be demodulated on the resource location of the second DCI scheduling, and the target aggregation level can be determined by using the indication information in the first information. set.

It should be understood that the second aggregation level set may be the default aggregation level set described above, or may be the aggregation level set currently used by the network device, which is not limited in this embodiment of the present application.

Optionally, the indication information may be an index or an ID of the target aggregation level set.

Each set of candidate aggregation levels (for example, a set of candidate aggregation levels specified by the protocol or a set of valid candidate aggregation levels configured by the network device) corresponds to an index or an ID, and the terminal device may use an index or identifier of the aggregation level set sent by the network device, A set of aggregation levels corresponding to the index or ID is determined. Moreover, the signaling overhead can be saved by delivering an index or an ID of the aggregation level set.

Further, the network device may send the first information by using the physical layer signaling, for example, the network device may use the first aggregation level in the first aggregation level set to transmit the first DCI, where the first DCI includes the foregoing first information; Or the network device sends the first information to the terminal device by using the high layer signaling, where the second DCI used for scheduling the high layer signaling is transmitted by using the second aggregation level in the second aggregation level set. In this application, physical layer signaling may be carried over a physical downlink control channel.

Specifically, the network device may send the first information through DCI (eg, referred to as the first DCI). The aggregation level used by the first DCI (for example, the first aggregation level) is one of the first aggregation level set, and the first aggregation level set may be the default aggregation level set described above, or may be the current network device. The aggregation level set that is being used is not limited in this embodiment of the present application. The terminal device obtains the first information by performing blind detection on the first DCI by using the first aggregation level set, and may further determine the target aggregation level set according to the indication information in the first message. In addition, the network device can also send the first information through high layer signaling. The high layer signaling is carried on the PDSCH, and the terminal device needs to first blindly check the DCI for scheduling the PDSCH (for example, as the second DCI), and then can demodulate the first layer in the high layer signaling at the corresponding resource location. information. The second DCI may be transmitted using one of the aggregation levels in the second aggregation level set (eg, as the second aggregation level). In this way, the terminal can blindly detect the second DCI according to the second aggregation level set, so that the first information in the high layer signaling can be demodulated on the resource location of the second DCI scheduling, and the target aggregation level set can be determined.

It should be understood that the first aggregation level set and the second aggregation level set may be the same or different. The first aggregation level and the second aggregation level may be the same or different, which is not specifically limited in this embodiment of the present application.

Optionally, the first information may further include time information, where the time information may be used to indicate an effective moment of the target aggregation level set.

In addition, the effective moment of the target aggregation level set may also be specified by the protocol or configured by the network device. For example, the effective moment of the target aggregation level set may be the start time of the next time unit of the time unit in which the network device transmits the first information or the Tth time unit after the next time unit, where T is a positive integer.

Optionally, the method may further include the following steps:

S240: The network device transmits the third DCI by using the first target aggregation level in the target aggregation level set.

S250, the terminal device blindly detects the third DCI by using the target aggregation level set;

S260. The network device performs data transmission with the terminal device according to the scheduling information carried in the third DCI.

Specifically, after the network device informs the terminal device of the target aggregation level, or after the target aggregation level set is valid, the network device can communicate with the terminal device by using the target aggregation level in the target aggregation level set. For example, the network device may transmit the third DCI using the first target aggregation level in the target aggregation level set, and the terminal device blindly checks the third DCI according to the target aggregation level set. After the terminal device detects the third DCI according to the first target aggregation level, the network device may determine the resource used by the network device to transmit data according to the scheduling information carried by the third DCI. When the network device transmits data on the resource indicated by the scheduling information carried by the third DCI, the terminal device may demodulate the data on the resource.

Optionally, before the S240, the method may further include: S270, the terminal device sends feedback information to the network device, where the feedback information is used to indicate whether the terminal device correctly receives the first information or indicates that the terminal device has correctly received the first information.

Specifically, after receiving the first information, the terminal device may send feedback information, such as ACK information, to the network device, so that the network device can determine whether the terminal device correctly receives the first information after receiving the feedback information. For example, after receiving the ACK information sent by the terminal device, the network device can confirm that the terminal device has correctly received the first information. For another example, after the network device receives the NACK information sent by the terminal device, or the network device does not receive any feedback from the terminal device within a preset time, it may confirm that the terminal device does not receive the first information. At this time, the network device may resend the first information to the terminal device by using a mechanism such as retransmission. After the terminal device correctly receives the first information and obtains the target aggregation level set, the network device can communicate with the terminal device by using the target aggregation level in the target aggregation level set.

The terminal device sends the feedback information, so that the network device can use the target aggregation and the like after receiving the feedback information, so that the terminal device does not receive the first information, and the target aggregation level set is not yet valid in the terminal device, but the network device When the set of target aggregation or the like is used, the robustness of the configuration process of the downlink control channel parameters can be improved.

The method for configuring the downlink control channel parameters provided by the application, the network device may select an aggregation level set according to actual requirements, and notify the terminal device of the selected aggregation level set, and flexibly adjust the aggregation level set used in the PDCCH transmission to avoid The PDCCH transmission is always performed by using a fixed aggregation level set, and the detection performance of the PDCCH by the terminal device is improved, thereby improving the service transmission performance. The flexibility of adjusting the aggregation level set can effectively adapt the requirements of the terminal equipment to the PDCCH transmission reliability, the air interface transmission efficiency requirement, and the limit requirement of the terminal equipment to the PDCCH blind detection time per unit time, and can be performed between various requirements. Proper compromise.

It should be understood that, in this application, the candidate PDCCH corresponding to the aggregation level may be specified by a protocol or configured by a network device. The candidate PDCCH corresponding to each aggregation level in the target aggregation level set sent by the network device to the terminal device by the physical layer signaling or the high layer signaling may be consistent with the protocol determination or the candidate PDCCH configured by the network device. That is to say, in the process of communicating with the terminal, the network device may only update the aggregation level that needs to be used when the terminal device is blindly detected, and does not change the candidate PDCCH corresponding to the updated aggregation level, but this application does not specifically limit this. .

Furthermore, in the NR system, the concept of a control resource set (CORESET) is introduced for control channel resources. CORESET corresponds to a time-frequency resource. A CORESET corresponds to a group of terminal devices, and the PDCCH of the group of terminal devices can be transmitted on the CORESET.

Considering the high reliability requirements of the URLLC service, the PDCCH may need to use a large aggregation level. If a PDCCH of a URLLC terminal device is sent in a CORESET, it may occupy a lot of CCE resources and limit the control in the CORESET. The possibility of resources scheduling other terminal devices increases the blocking probability. In order to reduce the blocking probability, one possible solution is to map one PDCCH into multiple CORESETs, so that a large equivalent aggregation level is used to transmit the PDCCH, and the PDCCH is prevented from using too many resources in one CORESET. . The equivalent aggregation level here is that only one CCE in a CORESET is used with respect to one PDCCH, and the equivalent aggregation level refers to the total number of CCEs used by one PDCCH, and these CCEs are located in at least two CORESETs.

Alternatively, in the case of multiple CORESETs, such as two CORESETs (ie, CORESET1 and CORESET2), CORESET1 and CORESET2 may be located on different frequency domain resources of the same time domain resource. Alternatively, CORESET1 and CORESET2 can be located on different time domain resources of the same frequency domain resource. Alternatively, CORESET1 and CORESET2 can be located on different frequency and time domain resources. When CORESET1 and CORESET2 are located on different time domain resources of the same frequency domain resource, two CORESETs may be located on the same time unit, or two CORESETs may be located on different time units. It should be understood that the time domain and frequency domain positional relationship between multiple CORESETs are not specifically limited in the embodiment of the present application.

In this application, the method shown in FIG. 2 can be applied to a scenario in which a PDCCH is mapped to multiple CORESETs, and the scheduling level flexibility of the network device and the PDCCH of the terminal device are improved by flexibly adjusting the aggregation level set used when the PDCCH is transmitted. Detection performance, which in turn can improve service transmission performance.

When the method shown in FIG. 2 is applied to a scenario in which a PDCCH is mapped to a plurality of CORESETs, a correspondence relationship between a CORESET (or a CORESET resource) and an aggregation level is involved. In the following, several possible ways of determining the correspondence between CORESET (or CORESET resources) and aggregation levels are described in detail.

It should be noted that the CORESET or the CORESET resource may be pre-configured by the network device by using the default aggregation level set or the aggregation level set currently used by the terminal device, but the embodiment of the present application is not limited thereto.

It should be understood that, in the following, the aggregation level #A is any one of the target aggregation level sets. ALi indicates that the aggregation level is i, where i is an integer greater than zero. For example, AL4 indicates an aggregation level of 4 and AL8 indicates an aggregation level of 8.

The first mode and the second mode in the following may be applied to the case where the target aggregation level set indicated by the first information sent by the network device is applicable to each of the plurality of CORESETs.

In this case, the terminal device determines whether each candidate downlink control channel corresponding to the target aggregation level in the target aggregation level set uses resources in the multiple CORESETs. The use of resources in the plurality of CORESETs by the candidate downlink control channel means that the candidate downlink control channels are distributed over a plurality of CORESETs, rather than being composed of only resources in one CORESET. It should be understood that the downlink control channel herein may be a PDCCH.

method one:

The protocol pre-defines an aggregation level threshold, or the network device configures an aggregation level threshold for the terminal device by using the threshold information, and the aggregation level #A in the target aggregation level set delivered by the network device is greater than or equal to (or greater than) the aggregation level threshold. At the time, the terminal device may determine that each candidate PDCCH of the aggregation level #A uses the resources CORESET in the plurality of CORESETs, and the CCE used by each candidate PDCCH is equally divided among the plurality of CORESETs; when the aggregation level #A is less than (or less than or equal to) When the aggregation level threshold is reached, the terminal device can determine that each candidate PDCCH of the aggregation level #A uses only one resource CORESET in one CORESET.

For example, the network device pre-configures the CORESET1 and the CORESET2 to the terminal device, and the aggregation level threshold is 16, and the target aggregation level set obtained by the network device dynamically transmitting the index or the target aggregation level set is {4, 8, 16}. Then the terminal device uses AL4 and AL8 for blind detection in CORESET1 and CORESET2, and uses AL16 for blind detection in combination with CORESET1 and CORESET2. Wherein, in the case that the PDCCH adopts AL4, the PDCCH may occupy only 4 CCEs in CORESET1, or may only occupy 4 CCEs in CORESET2. In the case that the PDCCH adopts AL8, the PDCCH may occupy only 8 CCEs in CORESET1, or may only occupy 8 CCEs in CORESET2. In the case where the PDCCH adopts AL16, the PDCCH may occupy 8 CCEs in each of CORESET1 and CORESET2.

It should be noted that the aggregation level threshold is one of all aggregation levels that the network device can use. Alternatively, the aggregation level threshold is a target aggregation level in the target aggregation level set.

Method 2:

The network device sends second information to the terminal device, where the second information is used to indicate whether each candidate PDCCH in each target aggregation level in the target aggregation level set uses resources in multiple CORESETs.

For example, the network device pre-configures the CORESET1 and the CORESET2 to the terminal device, and the target aggregation level set obtained by the network device dynamically transmitting the index or the target aggregation level set is {4, 8, 16}, and the network device sends the first Two information. In one design, the second information may be a bitmap. For example, the bitmap is 001, 0 means that resources in multiple CORESETs are not used, and 1 means that resources in multiple CORESETs are used, and the terminal device is in CORESET1 and In CORESET2, AL4 and AL8 are used separately for blind detection, and combined with CORESET1 and CORESET2, AL16 is used for blind detection. Wherein, in the case that the PDCCH adopts AL4, the PDCCH may occupy only 4 CCEs in CORESET1, or may only occupy 4 CCEs in CORESET2. In the case that the PDCCH adopts AL8, the PDCCH may occupy only 8 CCEs in CORESET1, or may only occupy 8 CCEs in CORESET2. In the case where the PDCCH adopts AL16, the PDCCH may occupy 8 CCEs in each of CORESET1 and CORESET2.

Optionally, the network device may send the second information by using high layer signaling or physical layer signaling.

Method three:

The network device can use the method shown in FIG. 2 to deliver a set of aggregation levels for each CORESET and the CORESET that can be combined. With this scheme, each CORESET can be configured with a different set of aggregation levels.

For example, the network device delivers the aggregation level set {4, 8} for the CORESET1, the aggregation level set {8} for the CORESET2, and the aggregation level set {16} for the combined CORESET1 and CORESET2. This means that the terminal device uses AL4 and AL8 for blind detection in CORESET1, AL8 for blind detection in CORESET2, and combined with CORESET1 and CORESET2 for blind detection using AL16. Wherein, in the case that the PDCCH adopts AL16, the PDCCH may occupy 8 CCEs in each of CORESET1 and CORESET2.

In this application, the protocol may specify the number of candidate PDCCHs that need to be blindly checked for each aggregation level, or the network device may notify the terminal device to perform blind detection for each aggregation level through RRC signaling, MAC CE, physical layer signaling, or the like. The number of candidate PDCCHs. For the ALi, the number of candidate PDCCHs is P, which may mean that the number of candidate PDCCHs corresponding to ALi in each CORESET is P, or all CORESETs corresponding to the terminal device, corresponding to ALi. The total number of candidate PDCCHs is P.

For example, suppose that the network device pre-configures CORESET1 and CORESET2 for the terminal device, and configures AL4 and AL16 through mode one or mode two, and each candidate PDCCH of AL4 uses only one resource in CORESET, and each candidate PDCCH of AL16 Both resources in CORESET1 and CORESET2 are used. If the number of candidate PDCCHs is 4 for AL4, it may be determined that the number of candidate PDCCHs corresponding to AL4 in CORESET1 and CORESET2 is 4, or in CORESET1 and CORESET2, the total number of candidate PDCCHs corresponding to AL4 is 4 ( For example, the number of candidate PDCCHs corresponding to AL4 in CORESET1 and CORESET2 is 2), and the total number of candidate PDCCHs of AL16 in CORESET1 and CORESET2 is 2.

For example, suppose the network device pre-configures the CORESET1 and the CORESET2 for the terminal device, and delivers the aggregation level set {4, 8} for the CORESET1 and the aggregation level set {8} for the CORESET2 for the combined CORESET1 and CORESET2 delivers the aggregation level set {16}. If the number of candidate PDCCHs is 4 for AL4, it can be determined that the number of candidate PDCCHs corresponding to AL4 in CORESET1 is 4. If the number of candidate PDCCHs is 4 for AL8, it may be determined that the number of candidate PDCCHs corresponding to AL8 in CORESET1 and CORESET2 is 4, or in CORESET1 and CORESET2, the total number of candidate PDCCHs corresponding to AL8 is 4 ( For example, the number of candidate PDCCHs corresponding to AL8 in CORESET1 and CORESET2 is 2). If the number of candidate PDCCHs is 2 for AL16, it can be determined that the total number of candidate PDCCHs of AL16 at CORESET1 and CORESET2 is 2.

It should be noted that, in the first mode and the second mode in the foregoing embodiment, in a case where resources of a plurality of CORESETs are used for each candidate PDCCH of the target aggregation level (referred to as the second target aggregation level), Each candidate PDCCH of the target aggregation level uses the resources of CORESET1 and CORESET2 as an example for description. In a specific implementation, if the network device pre-configures the P (P is an integer greater than or equal to 3) CORESET to the terminal device, the network device may send the third indication information to the terminal device by using the second target aggregation level. The three indication information indicates a correspondence between the candidate PDCCH corresponding to the second target aggregation level and the plurality of CORESETs, that is, which CORESET resources are used by the candidate PDCCH corresponding to the AL.

Optionally, in the present application, for the example described in the foregoing, the starting position of the CCE in the search space corresponding to the AL16 may be calculated by using the starting position of the CCE in the search space of the AL8 in the prior art. It can be calculated by using the starting position of the CCE in the search space that calculates the AL8 in the prior art, which is not limited by the embodiment of the present application.

On the basis of the method shown in FIG. 2, the embodiment of the present application can determine whether each AL crosses the CORESET scheduling by using a preset threshold or directly issuing an indication. On the one hand, the aggregation level used in the PDCCH transmission can be flexibly adjusted. The aggregation improves the scheduling flexibility of the network device and the detection performance of the PDCCH by the terminal device, thereby improving the service transmission performance. On the other hand, by transmitting the PDCCH across the CORESET, it is possible to prevent the PDCCH from occupying too much control resources in a certain CORESET, reduce the blocking probability of the CORESET, increase the frequency diversity of the PDCCH, and improve the reception reliability.

It should be understood that "a plurality" as used herein refers to "at least two."

FIG. 3 is a schematic block diagram of a network device 300 in accordance with an embodiment of the present application. As shown in FIG. 3, the network device 300 includes a processing unit 310 and a transceiver unit 320.

The processing unit 310 is configured to determine a target aggregation level set, where the target aggregation level set is a set of target aggregation levels that are to be used when the downlink control channel is transmitted;

The transceiver unit 320 is configured to send first information to the terminal device, where the first information includes indication information for indicating the target aggregation level set.

It should be understood that each unit in the network device 300 is used to perform each action or process performed by the network device in each method described above, and thus the beneficial effects in the foregoing method embodiments can also be achieved. Here, in order to avoid redundancy, a detailed description thereof will be omitted.

FIG. 4 is a schematic block diagram of a terminal device 400 according to an embodiment of the present application. As shown in FIG. 4, the terminal device 400 includes a transceiver unit 410 and a processing unit 420.

The transceiver unit 410 is configured to receive first information from the network device, where the first information includes indication information for indicating a target aggregation level set, where the target aggregation level set is a target aggregation level that needs to be used when transmitting the downlink control channel. Collection

The processing unit 420 is configured to determine the target aggregation level set according to the indication message.

It should be understood that each unit in the terminal device 400 is used to perform each action or process performed by the terminal device in each method described above, and thus the beneficial effects in the foregoing method embodiments can also be achieved. Here, in order to avoid redundancy, a detailed description thereof will be omitted.

FIG. 5 shows a schematic structural diagram of a network device 500 according to an embodiment of the present application. As shown in FIG. 5, the network device 500 includes a transceiver 510, a processor 520, and a memory 530. The transceiver 510, the processor 520 and the memory 530 communicate with each other through an internal connection path to transfer control and/or data signals.

The processor 520 is configured to determine a target aggregation level set, where the target aggregation level set is a set of target aggregation levels that are to be used when the downlink control channel is transmitted;

The transceiver 510 is configured to send first information to the terminal device, where the first information includes indication information for indicating the target aggregation level set.

It should be understood that when the processor 520 calls and runs the computer program from the memory, the processor 520 can be used to perform the data processing function of the network device in the method 200, and control the transceiver 510 to complete the information transceiving function of the corresponding network device.

FIG. 6 shows a schematic structural diagram of a terminal device 600 according to an embodiment of the present application. As shown in FIG. 6, the terminal device 600 includes a transceiver 610, a processor 620, and a memory 630. The transceiver 610, the processor 620, and the memory 630 communicate with each other through an internal connection path to transfer control and/or data signals.

The transceiver 610 is configured to receive first information from a network device, where the first information includes indication information for indicating a target aggregation level set, where the target aggregation level set is a target aggregation level that is used when the downlink control channel is transmitted. Collection

The processor 620 is configured to determine the target aggregation level set according to the indication information.

It should be understood that when the processor 620 calls and runs the computer program from the memory, the processor 620 can be configured to perform the data processing function of the terminal device in the method 200, and control the transceiver 610 to complete the information transceiving function of the corresponding terminal device.

The embodiments of the present application may be applied to a processor or implemented by a processor. The processor can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. The processor may be a central processing unit (CPU), the processor may be another general-purpose processor, a digital signal processor (DSP), or an application specific integrated circuit (ASIC). ), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software in the decoding processor. The software can be located in a random storage medium, such as a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, and the like. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.

It can be understood that when the embodiment of the present application is applied to a network device chip, the network device chip implements the functions of the processing unit 310 or the processor 520 described above. The network device chip sends the first information to other modules in the network device, such as a radio frequency module or an antenna. The first information is sent to the terminal device via other modules of the network device. Optionally, the network device chip may further receive the feedback information from other modules in the network device, such as a radio frequency module or an antenna, where the feedback information is sent by the terminal device to the network device.

When the embodiment of the present application is applied to a terminal device chip, the terminal device chip implements the functions of the processing unit 420 or the processor 620 described above. The terminal device chip receives the first information from other modules in the terminal device, such as a radio frequency module or an antenna, where the first information is sent by the network device to the terminal device. Optionally, the terminal device chip may further send the feedback information to other modules in the terminal device, such as a radio frequency module or an antenna, and the feedback information is sent to the network device via other modules of the terminal device.

It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory. The volatile memory can be a random access memory (RAM) that acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM). SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronously connected dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (DRRAM). It should be noted that the memories of the systems and methods described herein are intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should be understood that, in the various embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application. The implementation process constitutes any limitation.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above described device and unit can refer to the corresponding process in the foregoing method embodiment, and no further details are provided herein.

In the several embodiments provided herein, it should be understood that the disclosed apparatus and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the above units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims (32)

1. A method for configuring a downlink control channel parameter, comprising:

   The network device determines a target aggregation level set, where the target aggregation level set is a set of target aggregation levels that are to be used when the downlink control channel is transmitted;

   The network device sends first information to the terminal device, where the first information includes indication information for indicating the target aggregation level set.
2. The method of claim 1, wherein the indication information is an index or an identifier of the target aggregation level set.
3. The method of claim 2, wherein the sending, by the network device, the first information to the terminal device comprises:

   The network device sends the first information to the terminal device by using high layer signaling or physical layer signaling.
4. The method of claim 1 wherein said indication information is said target aggregation level set.
5. The method of claim 4, wherein the sending, by the network device, the first information to the terminal device comprises:

   The network device sends the first information to the terminal device by using high layer signaling.
6. The method of any of claims 1 to 5, further comprising:

   The network device receives feedback information from the terminal device, where the feedback information is used to indicate whether the terminal device correctly receives the first information or is used to indicate that the terminal device has correctly received the first information.
7. The method according to any one of claims 1 to 6, wherein the first information further comprises time information, the time information being used to indicate an effective time of the target aggregation level set.
8. The method according to any one of claims 1 to 7, wherein the method further comprises: the network device transmitting threshold information to the terminal device, the threshold information being used to determine the target aggregation level Corresponding relationship between the candidate downlink control channel and the plurality of control resource sets CORESET corresponding to each target aggregation level in the set, wherein the correspondence is a candidate downlink control channel corresponding to a resource in a CORESET or a candidate downlink control channel Corresponds to resources in at least two CORESETs.
9. A method for configuring a downlink control channel parameter, comprising:

   The terminal device receives the first information from the network device, where the first information includes indication information for indicating a target aggregation level set, where the target aggregation level set is a set of target aggregation levels that are to be used when the downlink control channel is transmitted;

   The terminal device determines the target aggregation level set according to the indication information.
10. The method of claim 9, wherein the indication information is an index or an identification of the target aggregation level set.
11. The method of claim 10, wherein the receiving, by the terminal device, the first information from the network device comprises:

    The terminal device receives the first information from the network device by using high layer signaling or physical layer signaling.
12. The method of claim 9, wherein the indication information is the target aggregation level set.
13. The method of claim 12, wherein the receiving, by the terminal device, the first information from the network device comprises:

    The terminal device receives the first information from the network device by using high layer signaling.
14. The method of any of claims 9 to 13 further comprising:

    The terminal device sends feedback information to the network device, where the feedback information is used to indicate whether the terminal device correctly receives the first information or is used to indicate that the terminal device has correctly received the first information.
15. The method according to any one of claims 9 to 14, wherein the first information further comprises time information, the time information being used to indicate an effective time of the target aggregation level set.
16. The method according to any one of claims 9 to 15, wherein the method further comprises:

    The terminal device receives threshold information from the network device;

    The terminal device determines, according to the threshold information, a correspondence between a candidate downlink control channel and a plurality of control resource sets CORESET corresponding to each target aggregation level in the target aggregation level set, where the correspondence is a candidate The downlink control channel corresponds to a resource in one CORESET or one candidate downlink control channel corresponds to resources in at least two CORESETs.
17. A network device, comprising:

    a processing unit, configured to determine a target aggregation level set, where the target aggregation level set is a set of target aggregation levels to be used when transmitting the downlink control channel;

    And a transceiver unit, configured to send first information to the terminal device, where the first information includes indication information for indicating the target aggregation level set.
18. The network device according to claim 17, wherein the indication information is an index or an identifier of the target aggregation level set.
19. The network device according to claim 18, wherein the transceiver unit is specifically configured to:

    Transmitting the first information to the terminal device by using high layer signaling or physical layer signaling.
20. The network device according to claim 17, wherein said indication information is said target aggregation level set.
21. The network device according to claim 20, wherein the transceiver unit is specifically configured to:

    Transmitting the first information to the terminal device by using high layer signaling.
22. The network device according to any one of claims 17 to 21, wherein the transceiver unit is further configured to:

    Receiving feedback information from the terminal device, the feedback message is used to indicate whether the terminal device correctly receives the first information or is used to indicate that the terminal device has correctly received the first information.
23. The network device according to any one of claims 17 to 22, wherein the first information further includes time information, and the time information is used to indicate an effective time of the target aggregation level set.
24. The network device according to any one of claims 17 to 23, wherein the transceiver unit is further configured to:

    Sending threshold information to the terminal device, where the threshold information is used to determine a correspondence between a candidate downlink control channel and a plurality of control resource sets CORESET corresponding to each target aggregation level in the target aggregation level set, where The corresponding relationship is that one candidate downlink control channel corresponds to one resource in a CORESET or one candidate downlink control channel corresponds to resources in at least two CORESETs.
25. A terminal device, comprising:

    a transceiver unit, configured to receive first information from a network device, where the first information includes indication information for indicating a target aggregation level set, where the target aggregation level set is a target aggregation level that is used when the downlink control channel is transmitted. set;

    And a processing unit, configured to determine the target aggregation level set according to the indication information.
26. The terminal device according to claim 25, wherein the indication information is an index or an identifier of the target aggregation level set.
27. The terminal device according to claim 26, wherein the transceiver unit is specifically configured to:

    The first information from the network device is received through higher layer signaling or physical layer signaling.
28. The terminal device according to claim 25, wherein the indication information is the target aggregation level set.
29. The terminal device according to claim 28, wherein the transceiver unit is specifically configured to:

    Receiving the first information from the network device through high layer signaling.
30. The terminal device according to any one of claims 25 to 29, wherein the transceiver unit is further configured to:

    Sending feedback information to the network device, the feedback message is used to indicate whether the transceiver unit correctly receives the first information or is used to indicate that the transceiver unit has correctly received the first information.
31. The terminal device according to any one of claims 25 to 30, wherein the first information further includes time information, and the time information is used to indicate an effective time of the target aggregation level set.
32. The terminal device according to any one of claims 25 to 31, wherein the transceiver unit is further configured to:

    Receiving threshold information from the network device;

    The processing unit is further configured to: determine, according to the threshold information, a correspondence between a candidate downlink control channel and a plurality of control resource sets CORESET corresponding to each target aggregation level in the target aggregation level set, where the corresponding The relationship is that one candidate downlink control channel corresponds to a resource in one CORESET or one candidate downlink control channel corresponds to resources in at least two CORESETs.

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