Physical downlink control channel transmission method, device and storage medium

Abstract

The present disclosure discloses a physical downlink control channel transmission method, device and storage medium, which belongs to the field of wireless communication technology. In the transmission process of the physical downlink control channel, the base station determines the CORESET configured to the terminal, and then numbers each resource particle group REG in the CORESET according to the numbering rule corresponding to the CORESET, and then according to the REG mapping rule corresponding to the CORESET, the REGs are combined into REG packets, and the physical downlink control channel corresponding to the terminal is resource mapped to obtain the control channel unit CCE, and finally, the base station transmits the physical downlink control channel to the terminal. Among them, when resource mapping is performed according to the REG mapping rule, the capacity of the CORESET can be expanded, and a higher CCE aggregation degree can be obtained, thereby improving the efficiency of resource mapping.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technology, and in particular to a physical downlink control channel transmission method, device and storage medium. Background Art

[0002] In wireless communication technology, when a terminal needs to transmit a physical downlink control channel (PDCCH), the terminal needs to obtain resource allocation from a base station. In order to obtain the corresponding resource allocation, the base station can configure the corresponding terminal to occupy 1 to 3 OFDM (Orthogonal Frequency Division Multiplexing) symbols in the time domain and several PRBs (Physical Resource Block) in the frequency domain as a control resource set (Control Resource Set, CORESET). In the control resource set, each REG (Resource Element Group) is numbered first in the time domain and then in the frequency domain. By combining multiple REGs into a REG package, the correspondence between the CCE (Control Channel Element) further constituted by the REG package and the REG package index is calculated to obtain the resource mapping result.

[0003] However, the capacity of the existing CORESET is limited, and the number of CCEs obtained by the above method is limited, which cannot provide a higher CCE aggregation level, resulting in the possibility of repeated transmission of the transmitted PDCCH, resulting in a lower resource mapping rate and a higher delay. Summary of the invention

[0004] The present disclosure provides a physical downlink control channel transmission method, device and storage medium. The technical solution is as follows:

[0005] According to a first aspect of an embodiment of the present disclosure, a physical downlink control channel transmission method is provided, the method being executed by a base station, the method comprising:

[0006] Determine the control resource set CORESET configured for the terminal;

[0007] According to the numbering rule, each resource particle group REG in the CORESET is numbered; the numbering rule is used to determine the order in which each REG in the CORESET is numbered;

[0008] Combining at least one of the REGs into a REG packet according to a REG mapping rule; the REG mapping rule is used to determine the mapping of the REGs in the CORESET to the REG packet;

[0009] According to a REG packet mapping rule, at least one of the REG packets is formed into a control channel element CCE; the REG packet mapping rule is used to determine the mapping of the REG packet to the CCE;

[0010] A PDCCH composed of at least one of the CCEs is transmitted to the terminal.

[0011] In a possible implementation, before numbering each resource particle group REG in the CORESET according to the numbering rule, the method further includes:

[0012] According to the configuration parameters of the CORESET, the CORESET is divided into at least two CORESET sub-units in the time domain; and at least two of the CORESET sub-units are multiplexed in a time division manner.

[0013] In a possible implementation, numbering each resource particle group REG in the CORESET according to a numbering rule includes:

[0014] The REGs in the CORESET subunit are numbered in sequence according to the time domain order of at least two of the CORESET subunits.

[0015] In a possible implementation, sequentially numbering the REGs in the CORESET subunit according to the time domain order of at least two of the CORESET subunits includes:

[0016] According to the first numbering rule, the REGs are numbered in the CORESET subunit in the order of time domain first and frequency domain second, wherein the starting number of the REG in the CORESET subunit is determined according to the last number of the previous CORESET subunit.

[0017] In a possible implementation, the CORESET subunit is determined according to configuration parameters of high-level signaling, where the configuration parameters include:

[0018] At least one of the number of OFDM symbols occupied by the CORESET subunit in the time domain, the number of PRBs occupied by the CORESET subunit in the frequency domain, and the configured number of the CORESET subunit.

[0019] In a possible implementation, the CORESET subunit is determined according to a preset rule, wherein the preset rule includes: at least one of the number of preset subunits, the OFDM symbols occupied by the preset subunits, and the relationship between the PRB occupied by the preset subunits and the PRB occupied by the CORESET.

[0020] In a possible implementation, combining at least one of the REGs into a REG package according to the REG mapping rule includes:

[0021] Divide the REGs corresponding to the number of OFDM symbols occupied by each of the CORESET subunits in the time domain into individual REG packets;

[0022] or,

[0023] The six consecutive REGs in each of the CORESET subunits are divided into REG packets.

[0024] In a possible implementation, numbering each resource particle group REG in the CORESET according to a numbering rule includes:

[0025] When the numbering rule is the second numbering rule, each of the REGs in the CORESET is numbered in the order of first the time domain and then the frequency domain.

[0026] In a possible implementation, combining at least one of the REGs into a REG package according to the REG mapping rule includes:

[0027] Divide the REGs corresponding to the number of OFDM symbols occupied by the CORESET in the time domain into individual REG packets;

[0028] or,

[0029] The six consecutive REGs in the CORESET are divided into REG packets.

[0030] In a possible implementation scheme, the forming of a control channel element CCE from at least one REG packet according to a REG packet mapping rule includes:

[0031] Determine, according to the number of the REGs in each of the REG packets, a mapping relationship between the CCE in the PDCCH and each of the REG packets;

[0032] Resource mapping is performed on the PDCCH according to the mapping relationship to determine the CCE formed by the REG packet.

[0033] In a possible implementation, the method further includes:

[0034] At least one of the numbering rule and the REG mapping rule is notified to the terminal.

[0035] In a possible implementation, the method further includes:

[0036] At least one of the numbering rule and the REG mapping rule is determined according to a mapping manner for performing resource mapping on the PDCCH.

[0037] In a possible implementation scheme, the CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, wherein N is a positive integer greater than 3, and M is a positive integer greater than 1.

[0038] According to a second aspect of an embodiment of the present disclosure, a physical downlink control channel transmission method is provided, the method being executed by a terminal, the method comprising:

[0039] Acquire at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH;

[0040] The PDCCH sent by the base station is received according to at least one of the REG mapping rule and the numbering rule.

[0041] In a possible implementation scheme, the acquiring at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH includes:

[0042] Receive at least one of the REG mapping rule and the numbering rule notified by the base station.

[0043] In a possible implementation scheme, the acquiring at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH includes:

[0044] Determine a mapping mode in which the base station performs resource mapping on the PDCCH;

[0045] Obtain at least one of the REG mapping rule and the numbering rule corresponding to the mapping mode.

[0046] In a possible implementation scheme, the CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, wherein N is a positive integer greater than 3, and M is a positive integer greater than 1.

[0047] According to a third aspect of an embodiment of the present disclosure, a physical downlink control channel transmission device is provided, the device being used in a base station, the device comprising:

[0048] A resource set determination module, used to determine a control resource set CORESET configured for the terminal;

[0049] A numbering module, used for numbering each resource particle group REG in the CORESET according to a numbering rule; the numbering rule is used to determine the order in which each REG in the CORESET is numbered;

[0050] A REG packet combining module, configured to combine at least one of the REGs into a REG packet according to a REG mapping rule; the REG mapping rule is used to determine a mapping of the REGs in the CORESET to the REG packet;

[0051] A CCE combination module, configured to combine at least one of the REG packets into a control channel element CCE according to a REG packet mapping rule; the REG packet mapping rule is used to determine the mapping of the REG packet to the CCE;

[0052] A channel transmission module is used to transmit a PDCCH composed of at least one of the CCEs to the terminal.

[0053] In a possible implementation, the device further includes:

[0054] The subunit division module is used to divide the CORESET into at least two CORESET subunits in the time domain according to the configuration parameters of the CORESET; at least two of the CORESET subunits are multiplexed in a time division manner.

[0055] In a possible implementation, the numbering module includes:

[0056] The numbering submodule is used to sequentially number the REGs in the CORESET subunit according to the time domain order of at least two of the CORESET subunits.

[0057] In a possible implementation, the numbering submodule is used to:

[0058] According to the first numbering rule, the REGs are numbered in the CORESET subunit in the order of time domain first and frequency domain second, wherein the starting number of the REG in the CORESET subunit is determined according to the last number of the previous CORESET subunit.

[0059] In a possible implementation, the CORESET subunit is determined according to configuration parameters of high-level signaling, where the configuration parameters include:

[0060] At least one of the number of OFDM symbols occupied by the CORESET subunit in the time domain, the number of PRBs occupied by the CORESET subunit in the frequency domain, and the configured number of the CORESET subunit.

[0061] In a possible implementation, the CORESET subunit is determined according to a preset rule, wherein the preset rule includes: at least one of the number of preset subunits, the OFDM symbols occupied by the preset subunits, and the relationship between the PRB occupied by the preset subunits and the PRB occupied by the CORESET.

[0062] In a possible implementation, the REG packet combination module includes:

[0063] The first unit packet submodule is used to divide the REGs corresponding to the number of OFDM symbols occupied by each CORESET subunit in the time domain into individual REG packets;

[0064] or,

[0065] The first fixed sub-module is used to divide the six consecutive REGs in each of the CORESET sub-units into individual REG packets.

[0066] In a possible implementation, the numbering module includes:

[0067] The second numbering submodule is used to, when the numbering rule is the second numbering rule, number each REG in the CORESET in the order of first the time domain and then the frequency domain.

[0068] In a possible implementation, the REG packet combination module includes:

[0069] A second packet sub-module, configured to divide the REGs corresponding to the number of OFDM symbols occupied by the CORESET in the time domain into individual REG packets;

[0070] or,

[0071] The second fixed sub-module is used to divide the six consecutive REGs in the CORESET into individual REG packets.

[0072] In a possible implementation, the CCE combination module includes:

[0073] A mapping relationship determination submodule, used to determine the mapping relationship between the CCE in the PDCCH and each of the REG packets according to the number of the REGs in each of the REG packets;

[0074] The CCE determination submodule is used to perform resource mapping on the PDCCH according to the mapping relationship and determine the CCE composed of the REG package.

[0075] In a possible implementation, the device further includes:

[0076] A rule notification module is used to notify the terminal of at least one of the numbering rule and the REG mapping rule.

[0077] In a possible implementation, the device further includes:

[0078] The rule determination module is used to determine at least one of the numbering rule and the REG mapping rule according to a mapping method for performing resource mapping on the PDCCH.

[0079] In a possible implementation scheme, the CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, wherein N is a positive integer greater than 3, and M is a positive integer greater than 1.

[0080] According to a fourth aspect of an embodiment of the present disclosure, a physical downlink control channel transmission device is provided, the device being used in a terminal, the device comprising:

[0081] A rule acquisition module, used to acquire at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by a base station to send a PDCCH;

[0082] A channel receiving module is used to receive the PDCCH sent by the base station according to at least one of the REG mapping rule and the numbering rule.

[0083] In a possible implementation, the rule acquisition module includes:

[0084] The rule receiving submodule is used to receive at least one of the REG mapping rule and the numbering rule notified by the base station.

[0085] In a possible implementation, the rule acquisition module includes:

[0086] A mapping mode acquisition submodule, used to determine a mapping mode in which the base station performs resource mapping on the PDCCH;

[0087] The rule acquisition submodule is used to acquire at least one of the REG mapping rule and the numbering rule corresponding to the mapping mode.

[0088] In a possible implementation scheme, the CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, wherein N is a positive integer greater than 3, and M is a positive integer greater than 1.

[0089] According to a fifth aspect of an embodiment of the present disclosure, a physical downlink control channel transmission device is provided, the device being used in a base station, the device comprising:

[0090] processor;

[0091] a memory for storing executable instructions for the processor;

[0092] Wherein, the processor is configured to:

[0093] Determine the control resource set CORESET configured for the terminal;

[0094] According to the numbering rule, each resource particle group REG in the CORESET is numbered; the numbering rule is used to determine the order in which each REG in the CORESET is numbered;

[0095] According to a REG mapping rule REG mapping rule, at least one of the REGs is combined into a REG packet; the REG mapping rule REG mapping rule is used to determine the mapping of the REGs in the CORESET to the REG packet;

[0096] According to a REG packet mapping rule, at least one of the REG packets is formed into a control channel element CCE; the REG packet mapping rule is used to determine the mapping of the REG packet to the CCE;

[0097] A PDCCH composed of at least one of the CCEs is transmitted to the terminal.

[0098] According to a sixth aspect of an embodiment of the present disclosure, a physical downlink control channel transmission device is provided, the device being used in a terminal, the device comprising:

[0099] processor;

[0100] a memory for storing executable instructions for the processor;

[0101] Wherein, the processor is configured to:

[0102] Acquire at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH;

[0103] The PDCCH sent by the base station is received according to at least one of the REG mapping rule and the numbering rule.

[0104] According to the seventh aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium contains executable instructions, and the processor in the base station calls the executable instructions to implement the physical downlink control channel transmission method described in the above-mentioned first aspect or any optional implementation method of the first aspect.

[0105] According to the eighth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium contains executable instructions, and the processor in the terminal calls the executable instructions to implement the physical downlink control channel transmission method described in the above-mentioned second aspect or any optional implementation method of the second aspect.

[0106] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0107] In an embodiment of the present application, during the transmission of the physical downlink control channel, the base station determines the CORESET configured for the terminal, and then numbers each resource particle group REG in the CORESET according to the numbering rule corresponding to the CORESET, and then divides the REG into REG packets according to the REG mapping rule corresponding to the CORESET, and performs resource mapping on the physical downlink control channel corresponding to the terminal to obtain the control channel unit CCE. At the same time, the terminal can receive the REG mapping rule used sent by the base station. Finally, the base station transmits the physical downlink control channel to the terminal, and the terminal can receive the physical downlink control channel sent by the base station according to the REG mapping rule. Among them, when performing resource mapping through the REG mapping rule, the capacity of the CORESET can be expanded, and a higher CCE aggregation degree can be obtained, thereby improving the efficiency of resource mapping.

[0108] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0109] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0110] Figure 1 is a schematic diagram of a physical downlink control channel transmission system provided by an embodiment of the present disclosure;

[0111] Figure 2 It is a flow chart of a physical downlink control channel transmission method provided by an embodiment of the present disclosure;

[0112] Figure 3 It is a flow chart of a physical downlink control channel transmission method provided by an embodiment of the present disclosure;

[0113] Figure 4 It is a method flow chart of a physical downlink control channel transmission method provided by an embodiment of the present disclosure;

[0114] Figure 5 yes Figure 4 A schematic diagram of a CORESET composition involved in the illustrated embodiment;

[0115] Figure 6 yes Figure 4 The illustrated embodiment relates to a schematic diagram of dividing a CORESET into CORESET subunits;

[0116] Figure 7 is a method flow chart of another physical downlink control channel transmission method provided by an embodiment of the present disclosure;

[0117] Figure 8 yes Figure 7 The illustrated embodiment relates to a schematic diagram of directly numbering each REG in a CORESET;

[0118] Fig. 9 is a block diagram of a physical downlink control channel transmission provided by an embodiment of the present disclosure;

[0119] Fig.10 is a block diagram of a physical downlink control channel transmission provided by an embodiment of the present disclosure;

[0120] Fig.11 is a structural diagram of a base station provided by an embodiment of the present disclosure;

[0121] Fig.12 It is a structural diagram of a terminal provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0122] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0123] It should be understood that the "several" mentioned in this article refers to one or more, and "multiple" refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0124] For ease of understanding, the nouns involved in the embodiments of the present application are explained below.

[0125] 1) NR-Lite (New Radio Lite)

[0126] In the LTE 4G system, two technologies, MTC (Machine Type Communication) and NB-IoT (Narrow Band Internet Of Thing), were proposed to support IoT services. These two technologies are mainly aimed at low-rate, high-latency scenarios. However, no matter how NB-IoT and MTC evolve, they are both low-power wide-area IoT networks. Their basic capabilities of low power consumption, low cost, wide coverage, and large connections remain unchanged. Therefore, they are mainly aimed at "low-end IoT application scenarios" with low data transmission rates and high latency, such as smart parking, smart meter reading, and smart street lights. At the same time, on the other hand, with the continuous development of IoT services, such as video surveillance, smart home, wearable devices, and industrial sensor monitoring, these services usually require a rate of tens to hundreds of megabits, and also have relatively high requirements for latency, so it is difficult for MTC and NB-IoT technologies in LTE to meet the requirements. Based on this situation, it is proposed to design a new IoT technology in the 5G new air interface to cover the requirements of such mid-end IoT devices.

[0127] 2) PDCCH (Physical Downlink Control Channel)

[0128] In the air interface protocol, physical channels, transport channels, and logical channels are defined. Logical channels describe the type of information, that is, they define what information is transmitted. Transport channels describe the transmission method of information, that is, they define how information is transmitted. Physical channels are used by the physical layer to transmit specific signals.

[0129] The physical channels include PDCCH, PUSCH (Physical Uplink Shared Channel), PDSCH (Physical Downlink Shared Channel), and PUCCH (Physical Uplink Control Channel). DCI (Downlink Control Information) can be transmitted through PDCCH.

[0130] Please refer to Figure 1 , which shows a schematic diagram of a physical downlink control channel transmission system provided by an embodiment of the present disclosure, such as Figure 1 As shown, the physical downlink control channel transmission system may include: a base station 110 and a terminal 120.

[0131] The terminal 120 may be a wireless communication device that supports multiple wireless access technologies for data transmission. The terminal 120 may communicate with one or more core networks via a radio access network (RAN). The terminal 120 may be an IoT terminal, such as a sensor device, a mobile phone (or a "cellular" phone), and a computer with an IoT terminal, for example, a fixed, portable, pocket-sized, handheld, computer-built-in, or vehicle-mounted device. For example, a station (STA), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a user equipment (UE). Alternatively, the terminal 120 may also be a device of an unmanned aerial vehicle.

[0132] The base station 110 may be a network side device in a wireless communication system. The wireless communication system may be a 5G system, also known as a New Radio (NR) system. Alternatively, the wireless communication system may be a next generation system of the 5G system. Alternatively, it may be an NR-lite system.

[0133] Among them, the base station 120 can be a base station (gNB) adopting a centralized distributed architecture in the 5G system. When the base station 120 adopts a centralized distributed architecture, it usually includes a centralized unit (CU) and at least two distributed units (DU). The centralized unit is provided with a packet data convergence protocol (PDCP) layer, a radio link layer control protocol (RLC) layer, and a media access control (MAC) layer protocol stack; the distributed unit is provided with a physical (PHY) layer protocol stack. The specific implementation method of the base station 110 is not limited in the embodiment of the present disclosure.

[0134] A wireless connection may be established between the base station 110 and the terminal 120 via a wireless air interface. In different implementations, the wireless air interface is a wireless air interface based on the fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; or, the wireless air interface may also be a wireless air interface based on the next generation mobile communication network technology standard of 5G.

[0135] The present disclosure provides a physical downlink control channel transmission method, please refer to Figure 2 , which shows a method flow chart of a physical downlink control channel transmission method provided by an embodiment of the present disclosure. The physical downlink control channel transmission method can be applied to Figure 1 In the physical downlink control channel transmission system shown in FIG. Figure 1 The method may be performed by a base station in the process, and may include the following steps.

[0136] In step 201, a control resource set CORESET configured for a terminal is determined.

[0137] In step 202, each resource element group REG in the CORESET is numbered according to a numbering rule; the numbering rule is used to determine the order in which each REG in the CORESET is numbered.

[0138] In step 203, at least one of the REGs is combined into a REG packet according to a REG mapping rule; the REG mapping rule is used to determine the mapping of the REGs in the CORESET to the REG packet.

[0139] In step 204, at least one of the REG packets is grouped into a control channel element CCE according to a REG packet mapping rule; the REG packet mapping rule is used to determine the mapping of the REG packet to the CCE.

[0140] In step 205, a PDCCH composed of at least one of the CCEs is transmitted to the terminal.

[0141] In summary, during the transmission of the physical downlink control channel, the base station determines the CORESET configured for the terminal, and then numbers each resource particle group REG in the CORESET according to the numbering rule corresponding to the CORESET, and then divides the REG into REG packets according to the REG mapping rule corresponding to the CORESET, and performs resource mapping on the physical downlink control channel corresponding to the terminal to obtain the control channel unit CCE. At the same time, the terminal can receive the REG mapping rule used sent by the base station. Finally, the base station transmits the physical downlink control channel to the terminal, and the terminal can receive the physical downlink control channel sent by the base station according to the REG mapping rule. Among them, when performing resource mapping through the REG mapping rule, the capacity of the CORESET can be expanded, and a higher CCE aggregation degree can be obtained, thereby improving the efficiency of resource mapping.

[0142] The present disclosure provides a physical downlink control channel transmission method, please refer to Figure 3 , which shows a method flow chart of a physical downlink control channel transmission method provided by an embodiment of the present disclosure. The physical downlink control channel transmission method can be applied to Figure 1 In the physical downlink control channel transmission system shown in FIG. Figure 1 The method may be performed by a terminal in the process, and may include the following steps.

[0143] In step 301, at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by a base station to send a PDCCH is obtained.

[0144] In step 302, the PDCCH sent by the base station is received according to at least one of the REG mapping rule and the numbering rule.

[0145] In summary, during the transmission of the physical downlink control channel, the base station determines the CORESET configured for the terminal, and then numbers each resource particle group REG in the CORESET according to the numbering rule corresponding to the CORESET, and then divides the REG into REG packets according to the REG mapping rule corresponding to the CORESET, and performs resource mapping on the physical downlink control channel corresponding to the terminal to obtain the control channel unit CCE. At the same time, the terminal can receive the REG mapping rule used sent by the base station. Finally, the base station transmits the physical downlink control channel to the terminal, and the terminal can receive the physical downlink control channel sent by the base station according to the REG mapping rule. Among them, when performing resource mapping through the REG mapping rule, the capacity of the CORESET can be expanded, and a higher CCE aggregation degree can be obtained, thereby improving the efficiency of resource mapping.

[0146] Please refer to Figure 4 , which shows a method flow chart of a physical downlink control channel transmission method provided by an embodiment of the present disclosure, the physical downlink control channel transmission method can be applied to Figure 1 In the physical downlink control channel transmission system shown in FIG. Figure 1 The terminal interacts with the base station to execute the method, which may include the following steps.

[0147] In step 401, the base station determines a control resource set CORESET configured for the terminal.

[0148] In the disclosed embodiment, the base station may configure a corresponding CORESET for the terminal.

[0149] In order to transmit PDCCH, the base station can configure CORESET for the corresponding user terminal, and the CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, where N can be a positive integer greater than 3 and M can be a positive integer greater than 1.

[0150] For example, please refer to Figure 5 , which shows a schematic diagram of a CORESET composition involved in an embodiment of the present application. Figure 5 As shown, the CORESET can occupy several OFDM symbols in the horizontal axis direction, that is, the time domain direction, where a small grid in the time domain direction represents an OFDM symbol, and the CORESET can occupy several PRBs in the vertical axis direction, that is, the frequency domain direction, where a small grid in the frequency domain direction represents a PRB.

[0151] In step 402, the base station determines at least one of the numbering rule and the REG mapping rule according to a mapping mode for performing resource mapping on the PDCCH.

[0152] In the embodiment of the present disclosure, the base station may determine at least one of the numbering rule for PEG and the REG mapping rule in the CORESET according to the mapping manner for mapping resources when performing PDCCH transmission.

[0153] The numbering rule may be used to indicate the order in which the REGs in the CORESET are numbered, and the REG mapping rule may be used to indicate the way in which the REG packages in the CORESET are divided.

[0154] In one possible implementation, the numbering rules can be divided into a first numbering rule and a second numbering rule, and REGs are numbered in different orders. Similarly, the REG mapping rules can be divided into a first REG mapping rule and a second REG mapping rule, wherein the two numbering rules and the two REG mapping rules can have a unique correspondence, that is, when the numbering rule is determined, the REG mapping rule corresponding to the numbering rule can be determined, and conversely, when the REG mapping rule is determined, the numbering rule corresponding to the REG mapping rule can also be determined.

[0155] In a possible implementation, the base station may determine any one of the numbering rules and REG mapping rules according to the mapping method of resource mapping of PDCCH, obtain another determined rule according to the corresponding relationship, or directly determine the numbering rule and REG mapping rule.

[0156] The mapping mode of resource mapping of PDCCH may include centralized mapping and distributed mapping.

[0157] In one possible implementation, when the base station determines that the mapping method for resource mapping of PDCCH is distributed mapping, it can be determined that the numbering rule can be the first numbering rule, and the corresponding REG mapping rule can be the first REG mapping rule; when the base station determines that the mapping method for resource mapping of PDCCH is centralized mapping, it can be determined that the numbering rule can be the second numbering rule, and the corresponding REG mapping rule can be the second REG mapping rule.

[0158] In step 403, when the numbering rule is the first numbering rule, the base station divides the CORESET into at least two CORESET subunits according to the time domain according to the configuration parameters of the CORESET.

[0159] In an embodiment of the present disclosure, when the base station determines that the numbering rule is the first numbering rule according to the mapping mode of resource mapping of PDCCH, the base station can divide the CORESET into at least two CORESET sub-units according to the time domain according to the configuration parameters of the CORESET.

[0160] Among them, at least two of the CORESET sub-units can be multiplexed in a time division manner.

[0161] In a possible implementation, the configuration parameters of the CORESET may include at least one of the number of OFDM symbols occupied by the CORESET subunit in the time domain, the number of PRBs occupied by the CORESET subunit in the frequency domain, and the configuration number of the CORESET subunit.

[0162] In another possible implementation manner, the configuration parameters of the CORESET may include at least one of the number of OFDM symbols occupied by the CORESET in the time domain, the number of PRBs occupied by the CORESET in the frequency domain, and the configured number of subunits of the CORESET.

[0163] Among them, the base station can divide the CORESET into the configured number of CORESET subunits according to the number of OFDM symbols occupied by the CORESET subunit in the time domain and the number of PRBs occupied by the CORESET subunit in the frequency domain in the configuration parameters of the CORESET.

[0164] Among them, the duration of each CORESET subunit in the CORESET in the time domain can be the same, that is, the number of OFDM symbols occupied by each CORESET subunit in the time domain can be the same, and the number of PRBs occupied by each CORESET subunit in the frequency domain can be the same or different.

[0165] For example, please refer to Figure 6 , which shows a schematic diagram of dividing a CORESET into CORESET subunits according to an embodiment of the present application. Figure 6 As shown, when the number of OFDM symbols occupied by the CORESET subunit in the configuration parameters of the CORESET in the time domain is configured as two OFDM symbols, and the number of PRBs occupied in the frequency domain is configured as 8, the CORESET can be divided to obtain two CORESET subunits 61. When the configured number of CORESET subunits in the configuration parameters of the CORESET is configured as 2, it can also be determined that the CORESET is divided to obtain two CORESET subunits 61.

[0166] In step 404, the base station obtains the time domain order of at least two of the CORESET subunits.

[0167] In the embodiment of the present disclosure, the base station may number the at least two CORESET sub-units obtained by division according to the time domain direction.

[0168] In a possible implementation, the CORESET subunits may be numbered according to the order in the time domain direction.

[0169] For example, Figure 6 As shown, the CORESET is divided into two CORESET subunits 61, wherein the CORESET subunit 61 on the left can be numbered as CORESET subunit 1, and the CORESET subunit 61 on the right can be numbered as CORESET subunit 2.

[0170] In step 405, the base station numbers the REGs inside at least two CORESET subunits according to the time domain sequence of the at least two CORESET subunits, and in the order of first the time domain and then the frequency domain.

[0171] In the disclosed embodiment, the base station may first distinguish the CORESET subunits in order according to their numbers, and then number the REGs included in each CORESET subunit according to the numbering sequence of the CORESET subunits.

[0172] In a possible implementation, between each CORESET subunit, the number of REGs may be incremented in the time domain direction, that is, as the number of the CORESET subunit increases, the number of REGs in the corresponding CORESET subunit may be incremented.

[0173] For example, Figure 6 As shown, the REG 62 in the CORESET can be numbered by first numbering the REG 62 in the CORESET subunit 1. According to the numbering in the time domain and then the frequency domain, the numbers from 0 to 15 can be obtained in the CORESET subunit 1. Then the base station numbers the REG 62 in the CORESET subunit 2 followed by the REG 62 in the CORESET subunit 1, and the numbers of the REGs 62 in the CORESET subunit 2 can be obtained from 16 to 31.

[0174] In step 406, the base station combines the REGs into REG packets according to the REG mapping rule.

[0175] In the disclosed embodiment, the base station may divide the REGs included in each CORESET subunit into various REG packets according to the REG mapping rule corresponding to the first numbering rule.

[0176] In a possible implementation, the base station may divide the REGs corresponding to the number of OFDM symbols occupied by each CORESET subunit in the time domain into respective REG packets, or the base station may divide the six consecutive REGs in each CORESET subunit into respective REG packets.

[0177] Among them, several REGs can constitute a REG bundle, and the REG bundle can also be called a REG package.

[0178] The REG bundles may also be numbered, for example, they may be identified as REG bundle1, REG bundle2, and so on.

[0179] In a possible implementation, if a REG bundle identified as REG bundlei includes a total of x REGs, the numbers of the REGs in REG bundlei can be expressed as {i*x, i*x+1, ..., i*x+x-1}.

[0180] For example, Figure 6 As shown, the REG bundle 63 includes 2 REGs in total, and the numbers of the REGs in REG bundle0 can be expressed as {0, 1}, and the numbers of the REGs in REG bundle1 can be expressed as {2, 3}, and the REG bundles can be divided according to the numbers.

[0181] In step 407, the base station notifies the terminal of at least one of the numbering rule and the REG mapping rule.

[0182] In the embodiment of the present disclosure, the base station may determine at least one of the numbering rule and the REG mapping rule according to the initially obtained mapping method, and send the determined rule information to the corresponding terminal.

[0183] In a possible implementation manner, the terminal can obtain the solution adopted for resource mapping through the notification.

[0184] In step 408, the terminal obtains at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH.

[0185] In a possible implementation, the terminal can determine the mapping mode in which the base station performs resource mapping on the PDCCH based on the notification sent by the base station, and then the terminal can obtain at least one of the REG mapping rule and the numbering rule corresponding to the mapping mode.

[0186] In a possible implementation manner, the terminal may receive at least one of the REG mapping rule and the numbering rule notified by the base station.

[0187] In step 409, the base station determines a mapping relationship between a control channel element CCE in the PDCCH and each of the REG packets according to the number of the REGs in each of the REG packets.

[0188] Among them, several REG packets can constitute a CCE, and the CCE can be numbered and identified as CCE j, for example, can be identified as CCE1, CCE2, etc., where j is an integer greater than or equal to 0.

[0189] In a possible implementation manner, the base station may determine the mapping relationship between the CCE and each REG packet according to the definition of the interleaver function.

[0190] The definition of the interleaver function includes a calculation function corresponding to the centralized mapping and a calculation function corresponding to the distributed mapping. The interleaver function can be identified by f(.), and the definitions of f(.) in the two mapping modes can be shown in Table 1.

[0191]

[0192] Table 1

[0193] Where R is the number of interleaver rows, n shift is the offset parameter, is the total number of REGs in CORESET. C is an integer.

[0194] Among them, R and n shift Both parameters are configured by the higher layer, and the higher layer configuration parameters can be used to ensure that C is an integer.

[0195] Among them, CCE can be composed of 6 REGs.

[0196] In one possible implementation, the correspondence between CCE and REG bundle index can be identified by the interleaver function f(.), and through the identifier f(.) of the corresponding defined interleaver function, the REGbundle corresponding to CCEj can be obtained as {f(6j / x),f(6j / x+1),…,f(6j / x+6 / x-1)}.

[0197] In step 410, the base station performs resource mapping on the PDCCH according to the mapping relationship, and determines a control channel element CCE formed by the REG packet.

[0198] In the disclosed embodiment, the base station may perform resource mapping on the PDCCH according to the correspondence between the CCE and the REG bundle index, and determine the CCEs formed by the REG bundle.

[0199] In step 411, the base station transmits a PDCCH composed of at least one CCE to the terminal.

[0200] In step 412, the terminal receives the PDCCH sent by the base station according to at least one of the REG mapping rule and the numbering rule.

[0201] In summary, during the transmission of the physical downlink control channel, the base station determines the CORESET configured for the terminal, and then numbers each resource particle group REG in the CORESET according to the numbering rule corresponding to the CORESET, and then divides the REG into REG packets according to the REG mapping rule corresponding to the CORESET, and performs resource mapping on the physical downlink control channel corresponding to the terminal to obtain the control channel unit CCE. At the same time, the terminal can receive the REG mapping rule used sent by the base station. Finally, the base station transmits the physical downlink control channel to the terminal, and the terminal can receive the physical downlink control channel sent by the base station according to the REG mapping rule. Among them, when performing resource mapping through the REG mapping rule, the capacity of the CORESET can be expanded, and a higher CCE aggregation degree can be obtained, thereby improving the efficiency of resource mapping.

[0202] Please refer to Figure 7 , which shows a method flow chart of another physical downlink control channel transmission method provided by an embodiment of the present disclosure, the physical downlink control channel transmission method can be applied to Figure 1 In the physical downlink control channel transmission system shown in FIG. Figure 1 The terminal interacts with the base station to execute the method, which may include the following steps.

[0203] In step 701, the base station determines a control resource set CORESET configured for the terminal.

[0204] In step 702, the base station determines at least one of the numbering rule and the REG mapping rule according to a mapping mode for performing resource mapping on the PDCCH.

[0205] In step 703, when the numbering rule is the second numbering rule, the base station numbers each REG in the CORESET in the order of first the time domain and then the frequency domain.

[0206] In the embodiment of the present disclosure, when the base station determines that the numbering rule is the second numbering rule according to the mapping mode of resource mapping of PDCCH, the base station can directly number each REG in CORESET in the order of time domain first and frequency domain later.

[0207] For example, please refer to Figure 8 , which shows a schematic diagram of directly numbering each REG in a CORESET involved in an embodiment of the present application. Figure 8 As shown, when the numbering rule is determined to be the second numbering rule, firstly, the REGs 81 in the first row in the time domain are numbered from 0 to 3 in sequence, and then the REGs 81 in the second row in the frequency domain are numbered in the time domain direction, and each REG 81 in the CORESET numbered from 0 to 31 can be obtained.

[0208] In step 704, the base station divides each REG into each REG packet according to the REG mapping rule corresponding to the CORESET.

[0209] In a possible implementation manner, the base station may divide the REGs corresponding to the number of OFDM symbols occupied by the CORESET in the time domain into various REG packets, or the base station may divide the six consecutive REGs in the CORESET into various REG packets.

[0210] For example, Figure 8 As shown, the REG package 82 includes a total of 4 REGs, and the numbers of the REGs in REG bundle0 can be expressed as {0, 1, 2, 3}, and the numbers of the REGs in REG bundle1 can be expressed as {4, 5, 6, 7}. The REG package 82 can be divided according to the numbers.

[0211] In step 705, the base station notifies the terminal of at least one of the numbering rule and the REG mapping rule.

[0212] In step 706, the terminal obtains at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH.

[0213] In step 707, the base station determines a mapping relationship between a control channel element CCE in the PDCCH and each of the REG packets according to the number of the REGs in each of the REG packets.

[0214] In a possible implementation manner, the base station may determine the mapping relationship between the CCE and each REG packet according to the definition of the interleaver function.

[0215] The definition of the interleaver function includes a calculation function corresponding to the centralized mapping and a calculation function corresponding to the distributed mapping. The interleaver function can be identified by f(.), and the definitions of f(.) in the two mapping modes can be shown in Table 1.

[0216] Where R is the number of interleaver rows, n shift is the offset parameter, is the total number of REGs in CORESET. C is an integer.

[0217] Among them, R and n shift Both parameters are configured by the higher layer, and the higher layer configuration parameters can be used to ensure that C is an integer.

[0218] In step 708, the base station performs resource mapping on the PDCCH according to the mapping relationship, and determines a control channel element CCE formed by the REG packet.

[0219] In the embodiment of the present disclosure, the base station may determine the control channel element CCE formed by the REG packets according to the mapping relationship between the CCE and each REG packet.

[0220] Among them, several REG packets can constitute a CCE, and the CCE can be numbered and identified as CCE j, for example, can be identified as CCE1, CCE2, etc., and j is an integer greater than or equal to 0.

[0221] In one possible implementation, the correspondence between CCE and REG bundle index can be identified by the interleaver function f(.), and through the identifier f(.) of the corresponding defined interleaver function, the REGbundle corresponding to CCEj can be obtained as {f(6j / x),f(6j / x+1),…,f(6j / x+6 / x-1)}.

[0222] For example, if a REG bundle identified as REG bundlei includes 4 REGs in total, the REG bundle corresponding to CCE 1 may be {f(3 / 2), f(3 / 2+1), f(3 / 2+2)}.

[0223] In step 709, the base station transmits the PDCCH to the terminal according to the CCE.

[0224] In step 710, the terminal receives the PDCCH sent by the base station according to at least one of the REG mapping rule and the numbering rule.

[0225] Among them, the above steps 701 to 702 correspond to steps 401 to 402, and steps 705 to 710 correspond to the contents of steps 407 to 412, which will not be described in detail here.

[0226] In summary, during the transmission of the physical downlink control channel, the base station determines the CORESET configured for the terminal, and then numbers each resource particle group REG in the CORESET according to the numbering rule corresponding to the CORESET, and then divides the REG into REG packets according to the REG mapping rule corresponding to the CORESET, and performs resource mapping on the physical downlink control channel corresponding to the terminal to obtain the control channel unit CCE. At the same time, the terminal can receive the REG mapping rule used sent by the base station. Finally, the base station transmits the physical downlink control channel to the terminal, and the terminal can receive the physical downlink control channel sent by the base station according to the REG mapping rule. Among them, when performing resource mapping through the REG mapping rule, the capacity of the CORESET can be expanded, and a higher CCE aggregation degree can be obtained, thereby improving the efficiency of resource mapping.

[0227] The following are embodiments of the device disclosed herein, which can be used to execute the method embodiments disclosed herein. For details not disclosed in the device embodiments disclosed herein, please refer to the method embodiments disclosed herein.

[0228] Fig. 9 is a block diagram of a physical downlink control channel transmission provided by an embodiment of the present disclosure, such as Fig. 9 As shown, the physical downlink control channel transmission device can be implemented by hardware or a combination of hardware and software. Figure 1 All or part of the base stations in the physical downlink control channel transmission system shown in the figure are used to perform Figure 2 or Figure 4 or Figure 7 The steps performed by the base station in any of the illustrated embodiments. The physical downlink control channel transmission device may include:

[0229] A resource set determination module 910, configured to determine a control resource set CORESET configured for the terminal;

[0230] A numbering module 920 is used to number each resource particle group REG in the CORESET according to a numbering rule; the numbering rule is used to determine the order in which each REG in the CORESET is numbered;

[0231] A REG packet combining module 930, configured to combine at least one of the REGs into a REG packet according to a REG mapping rule; the REG mapping rule is used to determine the mapping of the REGs in the CORESET to the REG packet;

[0232] A CCE combining module 940 is used to combine at least one of the REG packets into a control channel element CCE according to a REG packet mapping rule; the REG packet mapping rule is used to determine the mapping of the REG packet to the CCE;

[0233] The channel transmission module 950 is configured to transmit a PDCCH composed of at least one of the CCEs to the terminal.

[0234] In a possible implementation, the device further includes:

[0235] The subunit division module is used to divide the CORESET into at least two CORESET subunits in the time domain according to the configuration parameters of the CORESET; at least two of the CORESET subunits are multiplexed in a time division manner.

[0236] In a possible implementation, the numbering module 920 includes:

[0237] The numbering submodule is used to sequentially number the REGs in the CORESET subunit according to the time domain order of at least two of the CORESET subunits.

[0238] In a possible implementation, the numbering submodule is used to:

[0239] According to the first numbering rule, the REGs are numbered in the CORESET subunit in the order of time domain first and frequency domain second, wherein the starting number of the REG in the CORESET subunit is determined according to the last number of the previous CORESET subunit.

[0240] In a possible implementation, the CORESET subunit is determined according to configuration parameters of high-level signaling, where the configuration parameters include:

[0241] At least one of the number of OFDM symbols occupied by the CORESET subunit in the time domain, the number of PRBs occupied by the CORESET subunit in the frequency domain, and the configured number of the CORESET subunit.

[0242] In a possible implementation, the CORESET subunit is determined according to a preset rule, wherein the preset rule includes: at least one of the number of preset subunits, the OFDM symbols occupied by the preset subunits, and the relationship between the PRB occupied by the preset subunits and the PRB occupied by the CORESET.

[0243] In a possible implementation, the REG packet combining module 930 includes:

[0244] The first unit packet submodule is used to divide the REGs corresponding to the number of OFDM symbols occupied by each CORESET subunit in the time domain into individual REG packets;

[0245] or,

[0246] The first fixed sub-module is used to divide the six consecutive REGs in each of the CORESET sub-units into individual REG packets.

[0247] In a possible implementation, the numbering module 920 includes:

[0248] The second numbering submodule is used to, when the numbering rule is the second numbering rule, number each REG in the CORESET in the order of first the time domain and then the frequency domain.

[0249] In a possible implementation, the REG packet combining module 930 includes:

[0250] A second packet sub-module, configured to divide the REGs corresponding to the number of OFDM symbols occupied by the CORESET in the time domain into individual REG packets;

[0251] or,

[0252] The second fixed sub-module is used to divide the six consecutive REGs in the CORESET into individual REG packets.

[0253] In a possible implementation, the CCE combining module 940 includes:

[0254] A mapping relationship determination submodule, used to determine the mapping relationship between the CCE in the PDCCH and each of the REG packets according to the number of the REGs in each of the REG packets;

[0255] The CCE determination submodule is used to perform resource mapping on the PDCCH according to the mapping relationship and determine the CCE composed of the REG package.

[0256] In a possible implementation, the device further includes:

[0257] A rule notification module is used to notify the terminal of at least one of the numbering rule and the REG mapping rule.

[0258] In a possible implementation, the device further includes:

[0259] The rule determination module is used to determine at least one of the numbering rule and the REG mapping rule according to a mapping method for performing resource mapping on the PDCCH.

[0260] In a possible implementation scheme, the CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, wherein N is a positive integer greater than 3, and M is a positive integer greater than 1.

[0261] In summary, during the transmission of the physical downlink control channel, the base station determines the CORESET configured for the terminal, and then numbers each resource particle group REG in the CORESET according to the numbering rule corresponding to the CORESET, and then divides the REG into REG packets according to the REG mapping rule corresponding to the CORESET, and performs resource mapping on the physical downlink control channel corresponding to the terminal to obtain the control channel unit CCE. At the same time, the terminal can receive the REG mapping rule used sent by the base station. Finally, the base station transmits the physical downlink control channel to the terminal, and the terminal can receive the physical downlink control channel sent by the base station according to the REG mapping rule. Among them, when performing resource mapping through the REG mapping rule, the capacity of the CORESET can be expanded, and a higher CCE aggregation degree can be obtained, thereby improving the efficiency of resource mapping.

[0262] Fig.10 is a block diagram of a physical downlink control channel transmission device provided by an embodiment of the present disclosure, such as Fig.10 As shown, the physical downlink control channel transmission device can be implemented by hardware or a combination of hardware and software. Figure 1 All or part of the terminals in the physical downlink control channel transmission system shown in the figure are used to perform Figure 3 or Figure 4 or Figure 7 The steps performed by the terminal in any of the illustrated embodiments. The physical downlink control channel transmission device may include:

[0263] A rule acquisition module 1010 is used to acquire at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by a base station to send a PDCCH;

[0264] The channel receiving module 1020 is used to receive the PDCCH sent by the base station according to at least one of the REG mapping rule and the numbering rule.

[0265] In a possible implementation, the rule acquisition module 1010 includes:

[0266] The rule receiving submodule is used to receive at least one of the REG mapping rule and the numbering rule notified by the base station.

[0267] In a possible implementation, the rule acquisition module 1010 includes:

[0268] A mapping mode acquisition submodule, used to determine a mapping mode in which the base station performs resource mapping on the PDCCH;

[0269] The rule acquisition submodule is used to acquire at least one of the REG mapping rule and the numbering rule corresponding to the mapping mode.

[0270] In a possible implementation scheme, the CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, wherein N is a positive integer greater than 3, and M is a positive integer greater than 1.

[0271] In summary, during the transmission of the physical downlink control channel, the base station determines the CORESET configured for the terminal, and then numbers each resource particle group REG in the CORESET according to the numbering rule corresponding to the CORESET, and then divides the REG into REG packets according to the REG mapping rule corresponding to the CORESET, and performs resource mapping on the physical downlink control channel corresponding to the terminal to obtain the control channel unit CCE. At the same time, the terminal can receive the REG mapping rule used sent by the base station. Finally, the base station transmits the physical downlink control channel to the terminal, and the terminal can receive the physical downlink control channel sent by the base station according to the REG mapping rule. Among them, when performing resource mapping through the REG mapping rule, the capacity of the CORESET can be expanded, and a higher CCE aggregation degree can be obtained, thereby improving the efficiency of resource mapping.

[0272] One point that needs to be explained is that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0273] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0274] An exemplary embodiment of the present disclosure provides a physical downlink control channel transmission device, which can implement the above-mentioned Figure 2 or Figure 4 or Figure 7 In the illustrated embodiment, all or part of the steps executed by the base station, the physical downlink control channel transmission device includes: a processor, a memory for storing instructions executable by the processor;

[0275] Wherein, the processor is configured to:

[0276] Determine the control resource set CORESET configured for the terminal;

[0277] According to the numbering rule, each resource particle group REG in the CORESET is numbered; the numbering rule is used to determine the order in which each REG in the CORESET is numbered;

[0278] Combining at least one of the REGs into a REG packet according to a REG mapping rule; the REG mapping rule is used to determine the mapping of the REGs in the CORESET to the REG packet;

[0279] According to a REG packet mapping rule, at least one of the REG packets is formed into a control channel element CCE; the REG packet mapping rule is used to determine the mapping of the REG packet to the CCE;

[0280] A PDCCH composed of at least one of the CCEs is transmitted to the terminal.

[0281] In a possible implementation, before numbering each resource particle group REG in the CORESET according to the numbering rule, the method further includes:

[0282] According to the configuration parameters of the CORESET, the CORESET is divided into at least two CORESET sub-units in the time domain; and at least two of the CORESET sub-units are multiplexed in a time division manner.

[0283] In a possible implementation, numbering each resource particle group REG in the CORESET according to a numbering rule includes:

[0284] The REGs in the CORESET subunit are numbered in sequence according to the time domain order of at least two of the CORESET subunits.

[0285] In a possible implementation, sequentially numbering the REGs in the CORESET subunit according to the time domain order of at least two of the CORESET subunits includes:

[0286] According to the first numbering rule, the REGs are numbered in the CORESET subunit in the order of time domain first and frequency domain second, wherein the starting number of the REG in the CORESET subunit is determined according to the last number of the previous CORESET subunit.

[0287] In a possible implementation, the CORESET subunit is determined according to configuration parameters of high-level signaling, where the configuration parameters include:

[0288] At least one of the number of OFDM symbols occupied by the CORESET subunit in the time domain, the number of PRBs occupied by the CORESET subunit in the frequency domain, and the configured number of the CORESET subunit.

[0289] In a possible implementation, the CORESET subunit is determined according to a preset rule, wherein the preset rule includes: at least one of the number of preset subunits, the OFDM symbols occupied by the preset subunits, and the relationship between the PRB occupied by the preset subunits and the PRB occupied by the CORESET.

[0290] In a possible implementation, combining at least one of the REGs into a REG package according to the REG mapping rule includes:

[0291] Divide the REGs corresponding to the number of OFDM symbols occupied by each of the CORESET subunits in the time domain into individual REG packets;

[0292] or,

[0293] The six consecutive REGs in each of the CORESET subunits are divided into REG packets.

[0294] In a possible implementation, numbering each resource particle group REG in the CORESET according to a numbering rule includes:

[0295] When the numbering rule is the second numbering rule, each of the REGs in the CORESET is numbered in the order of first the time domain and then the frequency domain.

[0296] In a possible implementation, combining at least one of the REGs into a REG package according to the REG mapping rule includes:

[0297] Divide the REGs corresponding to the number of OFDM symbols occupied by the CORESET in the time domain into individual REG packets;

[0298] or,

[0299] The six consecutive REGs in the CORESET are divided into REG packets.

[0300] In a possible implementation scheme, the forming of a control channel element CCE from at least one REG packet according to a REG packet mapping rule includes:

[0301] Determine, according to the number of the REGs in each of the REG packets, a mapping relationship between the CCE in the PDCCH and each of the REG packets;

[0302] Resource mapping is performed on the PDCCH according to the mapping relationship to determine the CCE formed by the REG packet.

[0303] In a possible implementation, the method further includes:

[0304] At least one of the numbering rule and the REG mapping rule is notified to the terminal.

[0305] In a possible implementation, the method further includes:

[0306] At least one of the numbering rule and the REG mapping rule is determined according to a mapping manner for performing resource mapping on the PDCCH.

[0307] In a possible implementation scheme, the CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, wherein N is a positive integer greater than 3, and M is a positive integer greater than 1.

[0308] In summary, during the transmission of the physical downlink control channel, the base station determines the CORESET configured for the terminal, and then numbers each resource particle group REG in the CORESET according to the numbering rule corresponding to the CORESET, and then divides the REG into REG packets according to the REG mapping rule corresponding to the CORESET, and performs resource mapping on the physical downlink control channel corresponding to the terminal to obtain the control channel unit CCE. At the same time, the terminal can receive the REG mapping rule used sent by the base station. Finally, the base station transmits the physical downlink control channel to the terminal, and the terminal can receive the physical downlink control channel sent by the base station according to the REG mapping rule. Among them, when performing resource mapping through the REG mapping rule, the capacity of the CORESET can be expanded, and a higher CCE aggregation degree can be obtained, thereby improving the efficiency of resource mapping.

[0309] An exemplary embodiment of the present disclosure provides a physical downlink control channel transmission device, which can implement the above-mentioned Figure 3 or Figure 4 or Figure 7 In the illustrated embodiment, all or part of the steps executed by the terminal, the physical downlink control channel transmission device includes: a processor, a memory for storing instructions executable by the processor;

[0310] Wherein, the processor is configured to:

[0311] Acquire at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH;

[0312] The PDCCH sent by the base station is received according to at least one of the REG mapping rule and the numbering rule.

[0313] In a possible implementation scheme, the acquiring at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH includes:

[0314] Receive at least one of the REG mapping rule and the numbering rule notified by the base station.

[0315] In a possible implementation scheme, the acquiring at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH includes:

[0316] Determine a mapping mode in which the base station performs resource mapping on the PDCCH;

[0317] Obtain at least one of the REG mapping rule and the numbering rule corresponding to the mapping mode.

[0318] In a possible implementation scheme, the CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, wherein N is a positive integer greater than 3, and M is a positive integer greater than 1.

[0319] In summary, during the transmission of the physical downlink control channel, the base station determines the CORESET configured for the terminal, and then numbers each resource particle group REG in the CORESET according to the numbering rule corresponding to the CORESET, and then divides the REG into REG packets according to the REG mapping rule corresponding to the CORESET, and performs resource mapping on the physical downlink control channel corresponding to the terminal to obtain the control channel unit CCE. At the same time, the terminal can receive the REG mapping rule used sent by the base station. Finally, the base station transmits the physical downlink control channel to the terminal, and the terminal can receive the physical downlink control channel sent by the base station according to the REG mapping rule. Among them, when performing resource mapping through the REG mapping rule, the capacity of the CORESET can be expanded, and a higher CCE aggregation degree can be obtained, thereby improving the efficiency of resource mapping.

[0320] The above mainly takes the terminal and the base station as examples to introduce the scheme provided by the embodiment of the present disclosure. It can be understood that in order to realize the above functions, the terminal includes a hardware structure and / or software module corresponding to the execution of each function. In combination with the modules and algorithm steps of each example described in the embodiment disclosed in the present disclosure, the embodiment of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present disclosure.

[0321] Fig.11 is a schematic diagram of the structure of a base station provided by an embodiment of the present disclosure. Fig.11 As shown:

[0322] The base station 1100 includes a communication unit 1104 and a processor 1102. The processor 1102 may also be a controller. Fig.11 The communication unit 1104 is used to support the base station to communicate with other network devices (such as terminals or other base stations, etc.).

[0323] Furthermore, the base station 1100 may also include a memory 1103 , and the memory 1103 is used to store program codes and data of the base station 1100 .

[0324] Understandably, Fig.11 Only a simplified design of the base station 1100 is shown. In practical applications, the base station 1100 may include any number of processors, controllers, memories, communication units, etc., and all terminals that can implement the embodiments of the present disclosure are within the protection scope of the embodiments of the present disclosure.

[0325] Fig.12 Schematic diagram of a terminal structure provided by an embodiment of the present disclosure. Fig.12 As shown:

[0326] The terminal 1200 includes a communication unit 1204 and a processor 1202. The processor 1202 may also be a controller. Fig.12 The communication unit 1204 is used to support the terminal to communicate with other network devices (such as base stations, etc.).

[0327] Furthermore, the terminal 1200 may also include a memory 1203 , and the memory 1203 is used to store program codes and data of the terminal 1200 .

[0328] Understandably, Fig.12Only a simplified design of the terminal 1200 is shown. In practical applications, the terminal 1200 may include any number of processors, controllers, memories, communication units, etc., and all terminals that can implement the embodiments of the present disclosure are within the protection scope of the embodiments of the present disclosure.

[0329] Those skilled in the art should be aware that in one or more of the above examples, the functions described in the embodiments of the present disclosure can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. Storage media can be any available media that can be accessed by general or special-purpose computers.

[0330] The embodiments of the present disclosure also provide a computer storage medium, which includes executable instructions, and the executable instructions are called and executed by a processor in a terminal or a base station to implement the physical downlink control channel transmission method executed by the terminal or the base station in the above-mentioned method embodiments; or, the executable instructions are called and executed by a processor in a terminal or a base station to implement the physical downlink control channel transmission method executed by the terminal or the base station in the above-mentioned method embodiments.

[0331] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0332] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A physical downlink control channel transmission method, characterized in that: The method is performed by a base station, and the method includes: Determine the control resource set CORESET configured to the terminal; According to the number of OFDM symbols occupied by the CORESET subunit in the time domain and the number of PRBs occupied by the CORESET subunit in the frequency domain in the configuration parameters of the CORESET, the CORESET is divided into at least two of the CORESET subunits; at least two of the CORESET subunits are multiplexed in a time division manner; Numbering the REGs in the CORESET subunit in sequence according to the time domain order of at least two of the CORESET subunits; Combining at least one of the REGs into a REG packet according to a REG mapping rule; the REG mapping rule is used to determine the mapping of the REGs in the CORESET to the REG packet; According to a REG packet mapping rule, at least one of the REG packets is formed into a control channel element CCE; the REG packet mapping rule is used to determine the mapping of the REG packet to the CCE; A PDCCH composed of at least one of the CCEs is transmitted to the terminal.

2. The method according to claim 1, characterized in that The step of sequentially numbering the REGs in the CORESET subunit according to the time domain order of at least two of the CORESET subunits includes: According to the numbering rule, REGs are numbered in the CORESET subunit in the order of time domain first and frequency domain second, wherein the starting number of the REG in the CORESET subunit is determined according to the last number of the previous CORESET subunit.

3. The method according to claim 1, characterized in that The method further includes: determining the CORESET subunit according to configuration parameters of high-level signaling, wherein the configuration parameters include: At least one of the number of OFDM symbols occupied by the CORESET subunit in the time domain, the number of PRBs occupied by the CORESET subunit in the frequency domain, and the configured number of the CORESET subunit.

4. The method according to claim 1, characterized in that The method further includes: determining the CORESET subunit according to a preset rule, wherein the preset rule includes: at least one of the number of preset subunits, OFDM symbols occupied by preset subunits, and the relationship between the PRB occupied by the preset subunit and the PRB occupied by the CORESET.

5. The method according to any one of claims 3 or 4, characterized in that: The combining at least one of the REGs into a REG packet according to the REG mapping rule comprises: Divide the REGs corresponding to the number of OFDM symbols occupied by each of the CORESET subunits in the time domain into individual REG packets; or, The six consecutive REGs in each of the CORESET subunits are divided into REG packets.

6. The method according to claim 1, characterized in that The step of forming a control channel element CCE from at least one of the REG packets according to a REG packet mapping rule includes: Determine, according to the number of the REGs in each of the REG packets, a mapping relationship between the CCE in the PDCCH and each of the REG packets; The PDCCH is resource mapped according to the mapping relationship to determine the CCE formed by the REG packet.

7. The method according to claim 1, characterized in that The method further comprises: The terminal is notified of at least one of a numbering rule and the REG mapping rule.

8. The method according to claim 1, characterized in that The method further comprises: At least one of the numbering rule and the REG mapping rule is determined according to a mapping manner for performing resource mapping on the PDCCH.

9. The method according to any one of claims 1 to 4, characterized in that: The CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, wherein N is a positive integer greater than 3, and M is a positive integer greater than 1.

10. A physical downlink control channel transmission method, characterized in that: The method is executed by a terminal, and includes: Acquire at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH; Receive the PDCCH sent by the base station according to at least one of the REG mapping rule and the numbering rule; the numbering rule is used to determine that the base station numbers the REGs in the CORESET subunit in the order of first the time domain and then the frequency domain, wherein the starting number of the REG in the CORESET subunit is determined according to the last number of the previous CORESET subunit; The CORESET includes at least two CORESET sub-units multiplexed in a time division manner, and at least two of the CORESET sub-units are obtained by dividing the CORESET by the base station according to the number of OFDM symbols occupied by the CORESET sub-unit in the time domain in the configuration parameters of the CORESET and the number of PRBs occupied by the CORESET sub-unit in the frequency domain.

11. The method according to claim 10, characterized in that The acquiring at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH includes: Receive at least one of the REG mapping rules and numbering rules notified by the base station.

12. The method according to claim 10, characterized in that The acquiring at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH includes: Determine a mapping mode in which the base station performs resource mapping on the PDCCH; Obtain at least one of the REG mapping rule and the numbering rule corresponding to the mapping mode.

13. The method according to any one of claims 10 to 12, characterized in that: The CORESET occupies N OFDM symbols in the time domain and M PRB physical resource blocks in the frequency domain, wherein N is a positive integer greater than 3, and M is a positive integer greater than 1.

14. A physical downlink control channel transmission device, characterized in that: The device is used in a base station, and includes: A resource set determination module, used to determine a control resource set CORESET configured for the terminal; A subunit division module, configured to divide the CORESET into at least two CORESET subunits according to the number of OFDM symbols occupied by the CORESET subunit in the time domain and the number of PRBs occupied by the CORESET subunit in the frequency domain in the configuration parameters of the CORESET; at least two of the CORESET subunits are multiplexed in a time division manner; A numbering submodule, used to sequentially number the REGs in the CORESET subunit according to the time domain order of at least two of the CORESET subunits; A REG packet combining module, configured to combine at least one of the REGs into a REG packet according to a REG mapping rule; the REG mapping rule is used to determine a mapping of the REGs in the CORESET to the REG packet; A CCE combination module, configured to combine at least one of the REG packets into a control channel element CCE according to a REG packet mapping rule; the REG packet mapping rule is used to determine the mapping of the REG packet to the CCE; A channel transmission module is used to transmit a PDCCH composed of at least one of the CCEs to the terminal.

15. A physical downlink control channel transmission device, characterized in that: The device is used in a terminal, and includes: A rule acquisition module, used to acquire at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by a base station to send a PDCCH; a channel receiving module, configured to receive the PDCCH sent by the base station according to at least one of the REG mapping rule and the numbering rule; the numbering rule is used to determine that the base station numbers the REGs in the CORESET subunit in the order of first the time domain and then the frequency domain, wherein the starting number of the REG in the CORESET subunit is determined according to the last number of the previous CORESET subunit; The CORESET includes at least two CORESET sub-units multiplexed in a time division manner, and at least two of the CORESET sub-units are obtained by dividing the CORESET by the base station according to the number of OFDM symbols occupied by the CORESET sub-unit in the time domain in the configuration parameters of the CORESET and the number of PRBs occupied by the CORESET sub-unit in the frequency domain.

16. A physical downlink control channel transmission device, characterized in that: The device is used in a base station, and includes: processor; a memory for storing executable instructions for the processor; Wherein, the processor is configured to: Determine the control resource set CORESET configured to the terminal; According to the number of OFDM symbols occupied by the CORESET subunit in the time domain and the number of PRBs occupied by the CORESET subunit in the frequency domain in the configuration parameters of the CORESET, the CORESET is divided into at least two of the CORESET subunits; at least two of the CORESET subunits are multiplexed in a time division manner; Numbering the REGs in the CORESET subunit in sequence according to the time domain order of at least two of the CORESET subunits; Combining at least one of the REGs into a REG packet according to a REG mapping rule; the REG mapping rule is used to determine the mapping of the REGs in the CORESET to the REG packet; According to a REG packet mapping rule, at least one of the REG packets is formed into a control channel element CCE; the REG packet mapping rule is used to determine the mapping of the REG packet to the CCE; A PDCCH composed of at least one of the CCEs is transmitted to the terminal.

17. A physical downlink control channel transmission device, characterized in that: The device is used in a terminal, and includes: processor; a memory for storing executable instructions for the processor; Wherein, the processor is configured to: Acquire at least one of a REG mapping rule and a numbering rule of a control resource set CORESET used by the base station to send a PDCCH; Receive the PDCCH sent by the base station according to at least one of the REG mapping rule and the numbering rule; the numbering rule is used to determine that the base station numbers the REGs in the CORESET subunit in the order of first the time domain and then the frequency domain, wherein the starting number of the REG in the CORESET subunit is determined according to the last number of the previous CORESET subunit; The CORESET includes at least two CORESET sub-units multiplexed in a time division manner, and at least two of the CORESET sub-units are obtained by dividing the CORESET by the base station according to the number of OFDM symbols occupied by the CORESET sub-unit in the time domain in the configuration parameters of the CORESET and the number of PRBs occupied by the CORESET sub-unit in the frequency domain.

18. A computer-readable storage medium, characterized in that: The readable storage medium includes executable instructions, and the executable instructions are called and executed by a processor in the base station to implement the physical downlink control channel transmission method as described in any one of claims 1 to 9 above.

19. A computer-readable storage medium, characterized in that: The readable storage medium includes executable instructions, and the executable instructions are called and executed by a processor in the terminal to implement the physical downlink control channel transmission method as described in any one of claims 10 to 13 above.

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