CN113260058B

CN113260058B - Downlink control information transmission method, terminal equipment and network equipment

Info

Publication number: CN113260058B
Application number: CN202010091456.9A
Authority: CN
Inventors: 刘昊; 李�根; 鲁智; 宋扬
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-02-13
Filing date: 2020-02-13
Publication date: 2023-03-24
Anticipated expiration: 2040-02-13
Also published as: WO2021159981A1; CN113260058A

Abstract

The invention discloses a downlink control information transmission method, terminal equipment and network equipment. The downlink control information transmission method comprises the following steps: acquiring a plurality of activated Transmission Configuration Indication (TCI) states corresponding to a control resource set (CORESET); receiving downlink control information transmitted on a Physical Downlink Control Channel (PDCCH) according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity.

Description

Downlink control information transmission method, terminal equipment and network equipment

Technical Field

The present invention relates to the field of communications, and in particular, to a downlink control information method, a terminal device, and a network device.

Background

A Physical Downlink Control Channel (PDCCH) is mainly used for transmitting network Control information, and indicates how to transmit a Downlink or uplink traffic Channel. In a New Radio (NR) system, information such as a frequency domain position occupied by a PDCCH on a bandwidth and an OFDM symbol number occupied by a time domain is encapsulated in a CORESET, and a network configures a CORESET resource for a UE and configures a TCI state of the CORESET to indicate information of a spatial reception beam corresponding to the CORESET resource.

When a network configures a plurality of transmission-Receive points (TRPs), a terminal Equipment (UE) may maintain a communication link with a plurality of TRPs at the same time. In a practical scenario, as shown in fig. 1, a communication link may be suddenly blocked, resulting in a sudden drop in the performance of the link. In order to improve the transmission performance of a Physical Downlink Control Channel (PDCCH), a reliable transmission scheme is to transmit the PDCCH on two TRPs simultaneously, so as to improve the transmission robustness.

In the related art, although each core set may configure a plurality of activated TCI states through RRC, the network may activate one TCI state of the core set only through a Media Access Control (MAC) Control Element (CE), but when the core set jointly transmits on a plurality of TRPs, the radio channel characteristics and the transmission beam of each TRP are different and correspond to different TCI states, and thus, it is necessary to activate a plurality of activated TCI states for the core set. When the CORESET corresponds to a plurality of activated TCI states, no effective solution is proposed at present on how to transmit downlink control information.

Disclosure of Invention

The embodiment of the invention aims to provide a downlink control information transmission method, terminal equipment and network equipment, so as to transmit downlink control information when the CORESET corresponds to a plurality of activated TCI states.

In a first aspect, a downlink control information transmission method is provided, which is applied to a terminal device, and the method includes: acquiring a plurality of activated Transmission Configuration Indication (TCI) states corresponding to a control resource set (CORESET); receiving downlink control information transmitted on a Physical Downlink Control Channel (PDCCH) according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI states of the time-frequency resources in the CORESET are determined in the plurality of activated TCI states according to a preset rule based on preset time-frequency resource granularity.

In a second aspect, a downlink control information transmission method is provided, and is applied to a network device, where the method includes: sending indication information indicating a plurality of activated TCI states corresponding to CORESET; downlink control information transmitted on the PDCCH according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI states of the time-frequency resources in the CORESET are determined in the plurality of activated TCI states according to a preset rule based on preset time-frequency resource granularity.

In a third aspect, a method for receiving a PDSCH is provided, where the method is applied to a terminal device, and the method includes: under the condition that at least one CORESET in the first CORESET corresponds to a plurality of activated TCI states, a media access control layer (MAC) control unit (CE) configures a plurality of code points for a Physical Downlink Shared Channel (PDSCH), and each code point is respectively mapped with one TCI state, if the time offset between the received Downlink Control Information (DCI) and the PDSCH is less than a receiving processing capacity threshold reported by the terminal equipment, determining the TCI state or QCL relationship of the received PDSCH according to a preset mode, wherein the PDSCH corresponds to the PDSCH, and the first CORESET is all CORESETs on a carrier bandwidth part (BWP) activated by a service cell monitored on a time slot nearest to the DCI.

In a fourth aspect, a terminal device is provided, which includes: the acquisition module is used for acquiring a plurality of activated Transmission Configuration Indication (TCI) states corresponding to a control resource set (CORESET); a receiving module, configured to receive downlink control information transmitted on a physical downlink control channel PDCCH according to an activated TCI state of each time-frequency resource in the CORESET; the activated TCI states of the time-frequency resources in the CORESET are determined in the plurality of activated TCI states according to a preset rule based on preset time-frequency resource granularity.

In a fifth aspect, a network device is provided, which includes: the transmitting module is used for transmitting indication information which indicates a plurality of activated TCI states corresponding to CORESET; a transmission module, configured to transmit downlink control information on the PDCCH according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity.

In a sixth aspect, a terminal device is provided, which includes: the method includes that under the condition that at least one CORESET in a first CORESET corresponds to a plurality of activated TCI states, a media access control layer (MAC) control unit (CE) configures a plurality of code points for a PDSCH, and each code point is respectively mapped with one TCI state, if the time offset between received Downlink Control Information (DCI) and the PDSCH is smaller than a receiving processing capacity threshold reported by terminal equipment, the TCI state or QCL relation of the received PDSCH is determined according to a preset mode, wherein the first CORESET is all CORESETs on a carrier bandwidth part (BWP) activated by a serving cell monitored on a time slot nearest to the DCI.

In a seventh aspect, a network device is provided, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the second aspect.

In an eighth aspect, a terminal device is provided, which includes: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the first or third aspect.

In a ninth aspect, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of the first or second or third aspect.

In the embodiment of the invention, when the CORESET is activated into a plurality of TCI states, the downlink control information transmitted on the PDCCH is received according to the activated TCI states of the time-frequency resources in the CORESET, wherein the activated TCI states of the time-frequency resources in the CORESET are determined in the activated TCI states according to a preset time-frequency resource granularity and a preset rule, so that the downlink control information can be transmitted when the CORESET corresponds to the activated TCI states, the UE can receive the network control information transmitted by each TRP on the CORESET resources, and the transmission robustness is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a diagram illustrating a UE simultaneously maintaining communication links with a plurality of TRPs in the related art;

fig. 2 is a flowchart illustrating a downlink control information transmission method according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a CORESET resource according to an embodiment of the present invention;

FIG. 4a is a schematic diagram of a TCI state configuration of a CORESET resource according to an embodiment of the present invention;

FIG. 4b is a schematic diagram of a TCI state configuration of another CORESET resource according to an embodiment of the present invention;

FIG. 4c is a schematic diagram of a TCI state configuration of a CORESET resource according to another embodiment of the present invention;

FIG. 4d is a schematic diagram of a TCI state configuration of a CORESET resource according to another embodiment of the present invention;

fig. 5 is another flowchart illustrating a downlink control information transmission method according to an embodiment of the present invention;

fig. 6 is a schematic flow chart of a PDSCH receiving method according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another terminal device provided in the embodiment of the present invention;

fig. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a network device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the invention can be applied to various communication systems, such as: global System for Mobile communications (GSM), code Division Multiple Access (CDMA), wideband Code Division Multiple Access (WCDMA), general Packet Radio Service (GPRS), long Term Evolution (LTE), long Term Evolution/enhanced Long Term Evolution (LTE-a), and NR (New Radio).

User Equipment (UE), also referred to as Terminal Equipment, mobile Terminal (Mobile Terminal), mobile User Equipment, etc., may communicate with one or more core networks via a Radio Access Network (e.g., RAN), and may be Mobile terminals, such as Mobile phones (or "cellular" phones) and computers with Mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted Mobile devices, which exchange languages and/or data with the Radio Access Network.

The Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, or an evolved Node B (eNB or e-NodeB) and a 5G Base Station (gNB) in LTE.

The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Fig. 2 is a flowchart of a downlink control information transmission method provided in an embodiment of the present invention, where the method 200 may be executed by a terminal device. In other words, the method may be performed by software or hardware installed on the terminal device. As shown in fig. 2, the method may include the following steps.

S210, acquiring a plurality of activated TCI states corresponding to CORESET.

In the embodiment of the present invention, the network device configures the core set for the UE, and at the same time, needs to configure the TCI state of the core set to indicate the Search Space (Search Space) bound by the core set. In order to enable the CORESET to jointly transmit on a plurality of TRPs, the network side needs to activate a plurality of activated TCI states for the CORESET.

In the embodiment of the present invention, the network device may configure multiple TCI states of one core set through Radio Resource Control (RRC) configuration signaling, and activate multiple TCI states of the core set through the MAC CE. For example, for CORESET 1, the network device configures 10 TCI states for the UE through RRC configuration signaling, and according to network setting requirements, the network device activates two TCI states among them through the MAC CE. The terminal device can acquire a plurality of activated TCI states corresponding to CORESET from the MAC CE.

S212, receiving downlink control information transmitted on the PDCCH according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI states of the time-frequency resources in the CORESET are determined in the plurality of activated TCI states according to a preset rule based on preset time-frequency resource granularity.

In the embodiment of the present invention, in order to adapt to a plurality of activated TCI states activated by one CORESET, the TCI states of each time-frequency resource of the CORESET may be configured according to a predetermined rule based on a preset time-frequency resource granularity.

Fig. 3 is a schematic structural diagram of a core set time-frequency resource, and as shown in fig. 3, the core set resource is composed of multiple Resource Element Groups (REGs), where 6 REGs may constitute one Control Channel Element (CCE), and 6 REGs may also constitute one REG bundle (bundle). Therefore, in one possible implementation, the preset time-frequency resource granularity may be a frequency domain granularity based on frequency domain partitioning. Optionally, the frequency domain granularity based on the frequency domain partitioning may include one of:

(1) The size of the configured REG bundle of CORESET. That is, the time frequency resources of the CORESET are divided into one time frequency resource according to the size of one REG bundle, and the TCI state is configured for each time frequency resource.

(2) CCEs. I.e. one TCI state is configured for each CCE contained in CORESET).

(3) REGs (i.e., each configured with a TCI status for each REG contained in CORESET).

(4) Precoding granularity for CORESET configuration. That is, the time frequency resources of the CORESET are divided into one time frequency resource according to the pre-coding granularity, and the TCI state is configured for each time frequency resource.

(5) Aggregation level of CORESET configured PDCCH.

(6) Candidate for PDCCH configured by CORESET (candidate).

In another possible implementation manner, the preset time-frequency resource granularity may also be a time-domain granularity based on time-domain partitioning. In this possible implementation, the PDCCH information on the CORESET is repeatedly transmitted on each resource based on the time-domain granularity of the time-domain division.

Optionally, the time domain granularity based on the time domain partitioning may include one of:

(1) The CORESET associated Search Space (SS). I.e. configuring the TCI status of the respective resources of the CORESET according to the SS associated with the CORESET.

(2) The search space continuously monitors the number of slots (duration) of the set of search spaces.

(3) The number of locations occast where CORESET appears in each time slot in the search space.

In a possible implementation manner, when the activated TCI state of each time-frequency resource in the CORESET is determined according to a predetermined rule, the activated TCI state of each time-frequency resource of the CORESET may be determined according to the number P of the plurality of activated TCI states and the number Q of the time-frequency resources of the CORESET based on the time-frequency resource granularity.

For example, if P = Q, each activated TCI state is mapped one-to-one with each time-frequency resource of CORESET, and the TCI states of each time-frequency resource of CORESET are different from each other. If P is less than Q, TCI states of partial time frequency resources in each time frequency resource of CORESET are the same. The concrete can be determined according to the practical application.

In one possible implementation, the predetermined rule includes: and averagely configuring a plurality of activated TCI states by each time-frequency resource of the CORESET based on the time-frequency resource granularity.

Alternatively, in the above average configuration, the following configuration may be adopted: and the time-frequency resource of the first time-frequency resource granularity of the CORESET is the first TCI state in the activated TCI states, the time-frequency resource of the second time-frequency resource granularity of the CORESET is the second TCI state in the activated TCI states, and the steps are repeated, wherein the time-frequency resource of the Nth time-frequency resource granularity of the CORESET is the Nth TCI state in the activated TCI states, the time-frequency resource of the N +1 th time-frequency resource granularity of the CORESET is the first TCI state, the time-frequency resource of the N +2 th time-frequency resource granularity of the CORESET is the second TCI state, and the steps are repeated until the TCI state of the time-frequency resource of the last time-frequency resource granularity of the CORESET is determined, wherein N is the number of the activated TCI states.

For example, assume that CORESET configures two TCI states: TCI state1 and TCI state2. Then:

(1) When the time-frequency resource granularity is configured as REG bundle, the time-frequency resource configuration with the REG bundle index as odd number is defined as TCI state1, and the time-frequency resource configuration with the REG bundle index as even number is defined as TCI state2.

(2) When the time-frequency resource granularity is configured as a CCE, the time-frequency resource with the CCE index of an odd number is configured as a TCI state1, and the time-frequency resource with the CCE index of an even number is configured as a TCI state2.

(3) And when the time frequency resource granularity is the PDCCH aggregation level, assuming that the CORESET configuration aggregation level is AL, and calculating CCE resources pre-allocated to the PDCCH according to a hash formula in the relevant standard. And mapping the pre-allocated CCE resources according to the aggregation level AL/2CCE resource positions. Wherein each candidate of AL is divided into two parts, the first part is configured as TCI state1 and the second part is configured as TCI state2. As shown in fig. 4 a.

(4) When the time-frequency resource granularity is configured as the search space associated with the CORSET, the number of the search space associated with the CORESET is assumed to be the same as the number of the TCI states activated by the CORESET. Then it is defined that the first search space time-frequency resource is configured as TCI state1, and the second search space time-frequency resource is configured as TCI state2.

For example, in fig. 4b, search spaces ss1 and ss2 are transmitted on different slot slots. The search space ss1 is configured with a first TCI state and the search space ss2 is configured with a second TCI state according to a predetermined rule. The same PDCCH information is sent periodically and repeatedly over two TCI states, i.e. two search spaces.

(5) When the granularity of the time frequency resource is the number of slots of the search space set that is continuously monitored by the search space, for example, in fig. 4c, the search space that is continuously monitoring two slots is currently configured. According to a predetermined rule, the SS on slot n is configured as the first TCI state, and the SS on slot n +1 is configured as the second TCI state. The same PDCCH information is sent repeatedly and periodically on two TCI states, slot n and slot n + 1. Two TCI states namely

(6) When the time frequency resource granularity is the number of locations occasting of the CORESET occurring in each time slot of the search space, that is, the number of locations (occasting) of the CORESET occurring in each time slot based on the SS. As shown in FIG. 4d, there are two monitor ocseeds for the Search Space of the current slot configuration. According to the predetermined rule, occase 1 is configured as the first TCI state, and occase 2 is configured as the second TCI state. The same PDCCH information is sent repeatedly and periodically at two TCI states, i.e. two ocseeds.

In the embodiment of the present invention, the predetermined rule may be configured in advance, and both the network device and the terminal device are already known. Alternatively, the predetermined rule may be predetermined by the network device and the terminal device, or the predetermined rule may be configured by the network side and then notified to the terminal device through signaling. Therefore, in one possible implementation, after S212, the method may further include: and the receiving network side sends a second preset signaling, wherein the second preset signaling carries a second parameter indicating the preset rule.

For example, for the case that the resource granularity is divided by time frequency, if the number of the activated TCI states is 2, a string of bit sequences may be carried in the second preset signaling to indicate the TCI states of the time frequency resources, for example, 0 represents TCI state1, and 1 represents TCI state2.

In the embodiment of the present invention, the preset time-frequency resource granularity may be configured in advance, for example, the preset time-frequency resource granularity is configured as a CCE through a high-level signaling, or may be agreed between a network device and a terminal device. The network device may also be selected according to an actual situation, in which case the network device needs to notify the terminal device of the selected preset time-frequency resource granularity. Thus, in one possible implementation, before S212, the method may further include: and a receiving network side sends a first preset signaling, wherein the first preset signaling carries a first parameter indicating the preset time-frequency resource granularity.

In the embodiment of the present invention, the terminal device may determine, according to the first parameter, a time-frequency resource granularity used when the network device configures each time-frequency resource of the CORESET.

In this embodiment of the present invention, the network device may notify the terminal device of multiple activated TCI states of the core set through a downlink MAC CE, and therefore, in a possible implementation manner, the first parameter may also be sent to the terminal device through the MAC CE, or the first parameter may also be transmitted using a signaling different from a signaling for notifying multiple activated TCI states of the core set, for example, multiple activated TCI states of some core sets of the terminal device are indicated by the MAC CE, for example, core set ID =1 activates two TCI states. And simultaneously, indicating the time-frequency resource of the CORESET through other signaling to configure two TCI states according to a corresponding rule based on certain resource granularity.

In the embodiment of the present invention, the first parameter indicating the preset time-frequency resource granularity may indicate one of the above various time-frequency resource granularities in a predetermined manner, or a parameter value of the parameter may also be null, which indicates that all the activated TCI states are configured for all the time-frequency resources of the CORESET.

In a possible implementation manner, the first preset signaling may also not carry a parameter indicating the preset time-frequency resource granularity, and in this case, the network device is instructed to configure all the activated TCI states for all the time-frequency resources of the CORESET.

For example, if the CORESET corresponds to a plurality of activated TCI states, if the first parameter of the first preset information is null or does not carry the first parameter, it may be indicated that the plurality of activated TCI states are configured for all time-frequency resources of the CORESET at the same time.

According to the technical scheme provided by the embodiment of the invention, when the CORESET is activated into a plurality of TCI states, the downlink control information transmitted on the PDCCH is received according to the activated TCI states of the time-frequency resources in the CORESET, wherein the activated TCI states of the time-frequency resources in the CORESET are determined in the activated TCI states based on the preset time-frequency resource granularity and according to the preset rule, so that the downlink control information can be transmitted when the CORESET corresponds to the activated TCI states, the UE can receive the network control information transmitted by each TRP on the CORESET resources, and the transmission robustness is improved.

Fig. 5 is another flowchart of a downlink control information transmission method according to an embodiment of the present invention, where the method 500 may be executed by a network device. In other words, the method may be performed by software or hardware installed on the network device. As shown in fig. 5, the method may include the following steps.

And S510, sending indication information indicating a plurality of activated TCI states corresponding to CORESET.

S512, according to the activated TCI state of each time-frequency resource in the CORESET, downlink control information is transmitted on the PDCCH; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity.

The preset time-frequency resource granularity and the predetermined rule are the same as those in the method 200, which is specifically referred to the description in the method 200.

In the embodiment of the present invention, the predetermined time-frequency resource granularity may be configured by the network side in advance through a high-level signaling, may be determined by the terminal device and the network device in advance, or may be determined by the network device and sent to the terminal device. If the network device determines and sends the information to the terminal device, in a possible implementation manner, before S512, the method may further include: and sending a first preset signaling, wherein the first preset signaling carries a first parameter indicating the preset time-frequency resource granularity.

In a possible implementation manner, a parameter value of the first parameter carried in the first preset signaling may be null (null), and in this case, all time-frequency resources of the core set are indicated to configure all the activated TCI states.

The indication information indicating the activated multiple activated TCI states of the CORESET and the first parameter may be carried in the same signaling for notification, or may be notified through different signaling, for example, the network device may indicate the indication information indicating the activated multiple activated TCI states of the CORESET and the first parameter to the terminal device through the MAC CE, or may notify through different signaling, which may specifically refer to the related description in the method 200.

In the embodiment of the present invention, the terminal device may determine, based on the activated TCI state of each time-frequency resource of the CORESET, a quasi-co-location (QCL) for receiving the PDCCH, and then receive, based on the QCL for receiving the PDCCH, downlink control information transmitted on the PDCCH.

In the embodiment of the present invention, the predetermined rule may be predetermined with the terminal device, or configured in advance, or may be indicated to the terminal device after the network device determines. Therefore, in one possible implementation, before S512, the method may further include: and sending a second preset signaling, wherein the second preset signaling carries a second parameter indicating the preset rule.

Through the technical scheme provided by the embodiment of the invention, when the network equipment transmits the downlink control information, the activated TCI state of each time-frequency resource configuration of the CORESET is determined based on the preset time-frequency resource granularity and the preset rule, so that the downlink control information can be transmitted when the CORESET corresponds to a plurality of activated TCI states.

In the related art, a Physical Downlink Shared Channel (PDSCH) is scheduled by a PDCCH, and a network device indicates spatial receive beam information (i.e., a TCI state) of the PDSCH scheduled by the PDCCH in Downlink Control Information (DCI) sent to a UE through the PDCCH, so that the UE can correctly interpret the TCI state only after monitoring the DCI, and determine to receive a receive beam used by the PDSCH scheduled by the PDCCH. However, if the time offset between the DCI and the scheduled PDSCH thereof, i.e., the time interval between the last symbol of the PDCCH where the DCI is located and the first symbol of the scheduled PDSCH thereof, is greater than or equal to the threshold timeDurationForQCL, the UE cannot determine the TCI state or QCL relationship for receiving the PDSCH.

In view of the above problems, an embodiment of the present invention provides a method for receiving a PDSCH.

Fig. 6 is a flowchart of a PDSCH receiving method according to an embodiment of the present invention, where the method 600 may be executed by a terminal device. In other words, the method may be performed by software or hardware installed on the terminal device. As shown in fig. 6, the method may include the following steps.

S610, in a situation that at least one of the first CORESET corresponds to multiple activated TCI states, the MAC CE configures multiple code points for the PDSCH, and each of the code points maps one TCI state, if a time offset between the received Downlink Control Information (DCI) and the corresponding PDSCH is less than a threshold of reception processing capability reported by the terminal device, determining the TCI state or QCL relationship of the received PDSCH according to a predetermined manner, where the first CORESET is all CORESETs on a Bandwidth part (Bandwidth part, BWP) of a carrier activated by a serving cell monitored in a time slot nearest to the DCI.

In one possible implementation, determining the TCI status or QCL relationship of the received PDSCH in a predetermined manner includes: determining a TCI state and/or QCL relationship for receiving the PDSCH according to a TCI state of a target CORESET, wherein the target CORESET belongs to one of first CORESETs, and the first CORESET is all CORESETs on a activated carrier Bandwidth part (BWP) of a serving cell monitored in the time slot.

In one possible implementation, the target CORESET may include one of:

(1) If at least one second CORESET is arranged in the first CORESET, the target CORESET is the CORESET with the smallest CORESET identification in the second CORESET, wherein the second CORESET is only configured with one TCI state; correspondingly, the UE may determine that the TCI state of receiving the PDSCH is a QCL relationship with the TCI state of the target CORESET.

(2) If each first CORESET is configured with a plurality of activated TCI states, the target CORESET identifies the smallest CORESET in the first CORESETs; correspondingly, the UE may determine that the TCI state of receiving the PDSCH and the first TCI state or the smallest identified TCI state of the target CORESET are QCL relationships.

(3) The first CORESET comprises at least one third CORESET, and the target CORESET identifies the smallest CORESET in the third CORESET, wherein the third CORESET is configured with a plurality of activated TCI states. Correspondingly, the UE may determine that the plurality of activated TCI states for receiving the PDSCH and the plurality of activated TCI states for the target CORESET are QCL relationships mapped one to one.

In one possible implementation, the TCI status or QCL relationship of the received PDSCH may also be determined based on the TCI status of the codepoint. Thus, in this possible implementation, determining the TCI state or QCL relationship of the received PDSCH in a predetermined manner may include: determining that the TCI state of the PDSCH and the TCI state of a target code point are QCL relationship, wherein the target code point is the code point with the smallest index in the plurality of code points. Namely, the target code point is the code point with the minimum index configured for the PDSCH in the MAC CE.

In the embodiment of the present invention, when a control resource set (CORESET) may activate multiple TCI states, and an offset between a DCI received by a terminal device and a corresponding PDSCH is smaller than a receiving processing capability threshold reported by the terminal device, the terminal device determines a TCI or a QCL for receiving the PDSCH according to a TCI state of the CORESET and a TCI state of the PDSCH or a TCI state of a codepoint (codepoints). Therefore, the problem of receiving the PDSCH when the offset is smaller than the receiving processing capacity threshold reported by the terminal equipment can be solved.

Fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present invention, and as shown in fig. 7, the network device 700 includes: a sending module 710, configured to send indication information indicating multiple activated TCI states corresponding to the CORESET; a transmission module 720, configured to transmit downlink control information on the PDCCH according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity.

In a possible implementation manner, the sending module 710 is further configured to send a first preset signaling, where the first preset signaling carries a first parameter indicating the preset time-frequency resource granularity.

In a possible implementation manner, the sending module 710 is further configured to send a second preset signaling, where the second preset signaling carries a second parameter indicating the predetermined rule.

The network device provided in the embodiment of the present invention can implement each process implemented by the network device in each method embodiment of fig. 2 to fig. 6, and achieve the same effect to avoid repetition, which is not described herein again.

Fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present invention, and as shown in fig. 8, the terminal device 800 includes: an obtaining module 810, configured to obtain a plurality of activated transmission configuration indications TCI states corresponding to a control resource set CORESET; a receiving module 820, configured to receive a downlink control information transmitted on a physical downlink control channel PDCCH according to an activated TCI state of each time-frequency resource in the CORESET; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity.

In a possible implementation manner, the preset time-frequency resource granularity includes: a frequency domain granularity based on a frequency domain partition, or a time domain granularity based on a time domain partition.

In one possible implementation, the frequency domain granularity based on the frequency domain partitioning comprises one of:

the size of the resource element group REG bundle configured in CORESET;

pre-coding granularity configured in CORESET;

aggregation level of a physical downlink control channel PDCCH configured in CORESET;

alternative of PDCCH configured in CORESET;

REG；

control channel element CCE.

In one possible implementation, the time-domain granularity based on the time-domain partitioning includes one of:

a search space associated with the CORESET;

the search space continuously monitors the time slot number of the search space set;

the number of locations in the search space where CORESET occurs in each time slot.

In one possible implementation, the predetermined rule includes:

and averagely configuring a plurality of activated TCI states by each time-frequency resource of the CORESET based on the time-frequency resource granularity.

In one possible implementation manner, each time-frequency resource of the CORESET configures, on average, a plurality of activated TCI states, including:

the time-frequency resource of the first time-frequency resource granularity of the CORESET is the first TCI state in the activated TCI states, the time-frequency resource of the second time-frequency resource granularity of the CORESET is the second TCI state in the activated TCI states, the process is repeated, the time-frequency resource of the Nth time-frequency resource granularity of the CORESET is the Nth TCI state in the activated TCI states, the time-frequency resource of the N +1 th time-frequency resource granularity of the CORESET is the first TCI state, the time-frequency resource of the N +2 th time-frequency resource granularity of the CORESET is the second TCI state, the process is repeated until the time-frequency resource of the last time-frequency resource granularity of the CORESET, wherein N is the number of the activated TCI states.

In a possible implementation manner, the receiving module 820 is further configured to receive a first preset signaling sent by a network side, where the first preset signaling carries a first parameter indicating the preset time-frequency resource granularity.

In a possible implementation manner, if the first parameter is null, it is indicated that all of the plurality of activated TCI states are configured for all of the time-frequency resources of the CORESET.

In a possible implementation manner, the receiving module 820 is further configured to receive a second preset signaling sent by a network side, where the second preset signaling carries a second parameter indicating the predetermined rule.

The terminal device provided by the embodiment of the present invention can implement each process implemented by the terminal device in each method embodiment of fig. 2 to fig. 5, and achieve the same effect to avoid repetition, which is not described herein again.

Fig. 9 is a schematic structural diagram of another terminal device according to an embodiment of the present invention, and as shown in fig. 9, the network device 900 includes: a determining module 910, configured to, when at least one core set in a first core set corresponds to multiple activated TCI states, a MAC control unit CE of a MAC layer configures multiple code points for a PDSCH, and each code point maps one TCI state, determine, according to a predetermined manner, a TCI state or a QCL relationship of the received PDSCH if a time offset between a received DCI and the PDSCH is smaller than a threshold of reception processing capability reported by the terminal device, where the first core set is all core sets on a carrier bandwidth part BWP activated by a serving cell monitored at a time slot closest to the DCI.

In one possible implementation manner, the determining module 910 determines the TCI state or the QCL relationship of the received PDSCH according to a predetermined manner, including:

and determining the TCI state and/or QCL relationship for receiving the PDSCH according to the TCI state of a target CORESET, wherein the target CORESET belongs to one of the first CORESET, and the first CORESET is all CORESETs on a carrier bandwidth part BWP activated by the serving cell monitored in the time slot.

In one possible implementation, the target CORESET includes one of:

if at least one second CORESET is arranged in the first CORESET, the target CORESET is the CORESET with the minimum CORESET identification in the first CORESET, wherein the second CORESET is only configured with one TCI state;

if each first CORESET is configured with a plurality of activated TCI states, the target CORESET identifies the smallest CORESET for the CORESETs in the first CORESET;

the first CORESET comprises at least one third CORESET, and the target CORESET identifies the smallest CORESET in the third CORESET, wherein the third CORESET is configured with a plurality of activated TCI states.

In one possible implementation, the determining module 910 determines, according to the TCI state of the target CORESET, a TCI state and/or a QCL relationship for receiving the PDSCH, including:

if the target CORESET is the CORESET with the minimum CORESET identifier in the second CORESET, determining that the TCI state for receiving the PDSCH and the TCI state for the target CORESET are in a QCL relationship;

if the target CORESET is the CORESET with the smallest CORESET identifier in the first CORESET, determining that the TCI state for receiving the PDSCH and the first TCI state or the TCI state with the smallest identifier are in a QCL relationship;

and if the target CORESET is the CORESET with the minimum CORESET identifier in the third CORESET, determining that the plurality of activated TCI states for receiving the PDSCH and the plurality of activated TCI states for the target CORESET are in a one-to-one mapping QCL relationship.

In one possible implementation, the determining module 910 determines the TCI state or the QCL relationship of the received PDSCH according to a predetermined manner, including: determining that the TCI state of the PDSCH and the TCI state of a target code point are QCL relationship, wherein the target code point is the code point with the smallest index in the plurality of code points.

The terminal device provided in the embodiment of the present invention can implement each process implemented by the terminal device in the method embodiment of fig. 6, and achieve the same effect to avoid repetition, which is not described herein again.

Fig. 10 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 1000 shown in fig. 10 includes: at least one processor 1001, memory 1002, at least one network interface 1004, and a user interface 1003. The various components in terminal device 1000 are coupled together by a bus system 1005. It is understood that bus system 1005 is used to enable communications among the components connected. The bus system 1005 includes a power bus, a control bus, and a status signal bus, in addition to a data bus. But for the sake of clarity the various busses are labeled in figure 10 as the bus system 1005.

The user interface 1003 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.

It is to be understood that the memory 1002 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), enhanced Synchronous SDRAM (ESDRAM), sync Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1002 of the subject systems and methods is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 1002 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 10021 and applications 10022.

The operating system 10021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 10022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. The program implementing the method according to the embodiment of the present invention may be included in the application program 10022.

In this embodiment of the present invention, the terminal device 1000 further includes: a computer program stored on the memory 1002 and executable on the processor 1001, the computer program when executed by the processor 1001 implementing the steps of: acquiring a plurality of activated Transmission Configuration Indication (TCI) states corresponding to a control resource set (CORESET); receiving downlink control information transmitted on a Physical Downlink Control Channel (PDCCH) according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity. Or, in the case that at least one core set in the first core set corresponds to multiple activated TCI states, the MAC control unit CE of the MAC layer configures multiple code points for the PDSCH, and each code point maps one TCI state, if the time offset between the received DCI and the PDSCH is smaller than the threshold of the reception processing capability reported by the terminal device, determining the TCI state or QCL relationship of the received PDSCH according to a predetermined manner, where the PDSCH corresponds to the PDSCH, and the first core set is all core sets on the activated carrier bandwidth portion BWP of the serving cell monitored in the time slot closest to the DCI.

The method disclosed by the embodiment of the invention can be applied to the processor 1001 or can be implemented by the processor 1001. The processor 1001 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1001. The Processor 1001 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 1002, and the processor 1001 reads the information in the memory 1002 and performs the steps of the method in combination with the hardware. In particular, the computer readable storage medium has stored thereon a computer program which, when executed by the processor 1001, implements the steps of the method 500 or the method 600 as described above and achieves the same effect.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

The terminal device 1000 can implement the foregoing processes implemented by the terminal device in the methods 200 to 600, and for avoiding repetition, details are not described here again.

Referring to fig. 11, fig. 11 is a structural diagram of a network device according to an embodiment of the present invention, which can implement various details of the method 300 and achieve the same effect. As shown in fig. 11, the network device 1100 includes: a processor 1101, a transceiver 1102, a memory 1103, a user interface 1104, and a bus interface, wherein:

in this embodiment of the present invention, the network side device 1100 further includes: a computer program stored on the memory 1103 and executable on the processor 1101, the computer program, when executed by the processor 1101, implementing the steps of:

sending indication information indicating a plurality of activated TCI states corresponding to CORESET; downlink control information transmitted on the PDCCH according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity.

In fig. 11, the bus architecture may include any number of interconnected buses and bridges, with various circuits representing one or more processors, in particular processors 1101, and memories, in particular memories 1103, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1102 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 1104 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1101 is responsible for managing the bus architecture and general processing, and the memory 1103 may store data used by the processor 1101 in performing operations.

The network device 1100 is capable of implementing the foregoing processes implemented by the network device in the methods 200 to 600, and achieves the same effect to avoid repetition, which is not described herein again.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the method 200, the method 500, or the method 600, and can achieve the same technical effect, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A downlink control information transmission method is applied to terminal equipment, and is characterized in that the method comprises the following steps:

acquiring a plurality of activated Transmission Configuration Indication (TCI) states corresponding to a control resource set (CORESET);

receiving downlink control information transmitted on a Physical Downlink Control Channel (PDCCH) according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity;

the time-frequency resource of the first time-frequency resource granularity of the CORESET is the first TCI state in the activated TCI states, the time-frequency resource of the second time-frequency resource granularity of the CORESET is the second TCI state in the activated TCI states, the above circulation is performed, the time-frequency resource of the Nth time-frequency resource granularity of the CORESET is the Nth TCI state in the activated TCI states, the time-frequency resource of the N +1 th time-frequency resource granularity of the CORESET is the first TCI state, the time-frequency resource of the N +2 th time-frequency resource granularity of the CORESET is the second TCI state, the circulation is performed until the time-frequency resource of the last time-frequency resource granularity of the CORESET, wherein N is the number of the activated TCI states.

2. The method of claim 1, wherein the predetermined time-frequency resource granularity comprises: a frequency domain granularity based on a frequency domain partition, or a time domain granularity based on a time domain partition.

3. The method of claim 2, wherein the frequency domain granularity based on the frequency domain partitioning comprises one of:

the size of the resource element group REG bundle configured in CORESET;

pre-coding granularity configured in CORESET;

alternative of PDCCH configured in CORESET;

REG；

control channel element CCE.

4. The method of claim 2, wherein the time-domain granularity based on time-domain partitioning comprises one of:

a search space associated with the CORESET;

5. The method of claim 1, wherein the predetermined rule comprises:

based on the time-frequency resource granularity, each time-frequency resource of the CORESET averagely configures a plurality of activated TCI states.

6. The method according to any of claims 1 to 5, wherein before receiving downlink control information transmitted on a physical downlink control channel, PDCCH, according to the activated TCI state of each time-frequency resource in the CORESET, the method further comprises: and a receiving network side sends a first preset signaling, wherein the first preset signaling carries a first parameter indicating the preset time-frequency resource granularity.

7. The method of claim 6, wherein if the first parameter is null, indicating that all of the plurality of activated TCI states are configured for all of the time-frequency resources of the CORESET.

8. The method according to any of claims 1 to 5, wherein before receiving downlink control information transmitted on a physical downlink control channel, PDCCH, according to the activated TCI state of each time-frequency resource in the CORESET, the method further comprises: and the receiving network side sends a second preset signaling, wherein the second preset signaling carries a second parameter indicating the preset rule.

9. A downlink control information transmission method is applied to a network device, and the method comprises the following steps:

sending indication information indicating a plurality of activated TCI states corresponding to CORESET;

downlink control information transmitted on the PDCCH according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity;

10. The method of claim 9, wherein prior to the downlink control information transmitted on the PDCCH according to the activated TCI status of each time-frequency resource in the CORESET, the method further comprises:

and sending a first preset signaling, wherein the first preset signaling carries a first parameter indicating the preset time-frequency resource granularity.

11. The method of claim 9, wherein prior to the downlink control information transmitted on the PDCCH according to the activated TCI status of each time-frequency resource in the CORESET, the method further comprises:

and sending a second preset signaling, wherein the second preset signaling carries a second parameter indicating the preset rule.

12. A terminal device, comprising:

the acquisition module is used for acquiring a plurality of activated Transmission Configuration Indication (TCI) states corresponding to a control resource set (CORESET);

a receiving module, configured to receive downlink control information transmitted on a physical downlink control channel PDCCH according to an activated TCI state of each time-frequency resource in the CORESET; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity;

13. A network device, comprising:

the transmitting module is used for transmitting indication information which indicates a plurality of activated TCI states corresponding to CORESET;

the transmission module is used for transmitting downlink control information on the PDCCH according to the activated TCI state of each time-frequency resource in the CORESET; the activated TCI state of each time-frequency resource in the CORESET is determined in the plurality of activated TCI states according to a preset rule based on a preset time-frequency resource granularity;

14. A terminal device, comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing:

the steps of the method of any one of claims 1 to 8.

15. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 9 to 11.

16. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements:

the steps of the method of any one of claims 1 to 8; or

The steps of the method of any one of claims 9 to 11.