CN111865531B

CN111865531B - Transmission indication method, network side equipment and terminal

Info

Publication number: CN111865531B
Application number: CN201910362449.5A
Authority: CN
Inventors: 苏昕; 高秋彬; 陈润华
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2021-10-29
Anticipated expiration: 2039-04-30
Also published as: CN111865531A

Abstract

The invention relates to the technical field of wireless communication, in particular to a transmission indication method, network side equipment and a terminal, which are used for solving the problem that no specific transmission configuration indication scheme exists at present for NC-JT transmission. The network side equipment determines at least one CORESET allocated to the terminal and determines at least one TCI state corresponding to the CORESET; and sending the determined at least one TCI state corresponding to the CORESET to the terminal, so that the terminal determines QCL information corresponding to a DMRS CDM group allocated by the network side equipment according to the at least one TCI state corresponding to the CORESET and/or determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH.

Description

Transmission indication method, network side equipment and terminal

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a transmission indication method, a network side device, and a terminal.

Background

With the continuous development of communication technology, people put higher demands on communication quality. In order to improve the signal quality at the edge of the serving cell and provide more balanced service in the server cell, the CoMP (Coordinated Multiple Point transmission) technology is still an important technical means in the NR system. From the perspective of network morphology, the CoMP technology performs network deployment in a manner of centralized processing of a large number of distributed access points and baseband, which is more favorable for providing balanced user experience rate, and significantly reduces time delay and signaling overhead caused by handover, and significantly improves communication quality.

According to the mapping relationship of the transmission signal stream to a plurality of access points, the access points may be TRP (transmission reception point) or antenna panel (panel), and the CoMP technology may be divided into coherent transmission and non-coherent transmission. In non-coherent transmission, each data stream is mapped to only a portion of the access points. Compared with coherent transmission, non-coherent transmission has lower requirements on synchronization between access points and transmission capability of a backhaul link, is insensitive to many non-ideal factors in real deployment conditions, and is therefore an important consideration for CoMP technology. Currently, research on NC-JT (non-coherent joint transmission) technology is being conducted in Rel-16.

The NC-JT transmission may employ a mode (referred to as a single-PDCCH mode) in which a single PDCCH (physical downlink control channel) schedules a single PDSCH (physical downlink shared channel), or may employ a mode (referred to as a multi-PDCCH mode) in which a plurality of PDCCHs each schedule a corresponding PDSCH. In the application scenario of NC-JT transmission, a network side allocates one or more access points for a terminal. For NC-JT transmission, there is currently no specific transmission configuration indication scheme.

Disclosure of Invention

The invention provides a transmission configuration indication method, network side equipment and a terminal, which are used for solving the problem that no specific transmission configuration indication scheme exists at present for NC-JT transmission.

Based on the foregoing problem, in a first aspect, an embodiment of the present invention provides a transmission configuration indication method, where the method includes:

the method comprises the steps that network side equipment determines at least one CORESET (control resource set) distributed for a terminal and determines at least one TCI (transmission configuration indication) state (situation) corresponding to the CORESET;

the network side equipment sends the determined at least one TCI state corresponding to the CORESET to the terminal, so that the terminal determines information of a QCL (Quasi Co-localized) corresponding to a Demodulation Reference Signal (CDM) group allocated by the network side equipment and/or determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to the at least one TCI state corresponding to the CORESET.

Because the network side equipment of the embodiment of the invention determines at least one TCI state for the CORESET of the terminal and sends the at least one TCI state corresponding to the CORESET to the terminal; the terminal determines QCL information corresponding to the DMRS CDM group according to at least one TCI state corresponding to CORESET, so that when one or more transmission points are allocated to the terminal, the terminal can acquire the QCL information corresponding to each transmission point according to at least one TCI state corresponding to CORESET. In addition, the terminal determines the QCL information corresponding to the DMRS CDM group according to at least one TCI state corresponding to the CORESET, and can also determine the TCI state corresponding to the CORESET used when the terminal receives the PDCCH, so that when one or more transmission points are allocated to the terminal, the terminal can accurately determine the TCI state corresponding to the CORESET used when the PDCCH is received. Further improving system performance.

Optionally, the number of TCI states corresponding to CORESET is determined according to the number of TRPs allocated to the terminal.

Optionally, the sending, by the network side device, the determined at least one TCI state corresponding to the CORESET to the terminal includes:

and the network side equipment sends the determined at least one TCI state corresponding to the CORESET to the terminal through a Media Access Control (MAC) CE (Control Element).

Optionally, after the network side device determines at least one TCI state corresponding to the CORESET, the method further includes:

the network side equipment indicates the corresponding relation between the TCI state and the DMRS CDM group to the terminal so that the terminal determines the TCI state corresponding to the DMRS CDM group allocated by the network side equipment according to the corresponding relation; and/or

And the network side equipment indicates a selection rule to the terminal so that the terminal selects a TCI state corresponding to CORESET used for receiving the PDCCH from at least one TCI state corresponding to CORESET according to the selection rule.

In a second aspect, an embodiment of the present invention provides a transmission configuration indication method, where the method includes:

the terminal receives at least one TCI state corresponding to CORESET sent by network side equipment; the network side equipment allocates at least one CORESET to the terminal;

the terminal determines QCL information corresponding to a DMRS CDM group allocated by the network side equipment according to at least one TCI state corresponding to the CORESET; and/or the terminal determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to the at least one TCI state corresponding to the CORESET.

Optionally, the receiving, by the terminal, at least one TCI state corresponding to the CORESET sent by the network side device includes:

and the terminal receives at least one TCI state corresponding to the CORESET sent by the network side equipment through the MAC CE.

Optionally, before the terminal determines, according to the configured at least one TCI state, QCL information corresponding to a DMRS CDM group allocated by the network side device, the method further includes:

the terminal determines that a preset condition is met; wherein the preset condition is one of the following conditions:

the method includes that a condition I is that a time interval between DCI (Downlink Control Information) received by a terminal and PDSCH (physical Downlink shared channel) received by the terminal is smaller than a preset threshold, and a QCL (quaternary clock language) type configured for the terminal comprises a preset type;

the second condition is that the time interval between the DCI received by the terminal and the PDSCH received by the terminal is smaller than a preset threshold, the QCL type configured for the terminal does not contain a preset type, and the received DCI does not contain a TCI information domain;

the third condition is that the time interval between the terminal receiving the DCI and receiving the PDSCH is not less than a preset threshold, and the received DCI does not contain a TCI information domain;

and fourthly, the time interval between the DCI reception and the PDSCH reception of the terminal is not less than a preset threshold, and the DCI format of the PDCCH for scheduling the PDSCH is a preset format.

Optionally, the determining, by the terminal, QCL information corresponding to a DMRS CDM group allocated by the network side device according to at least one TCI state corresponding to the CORESET includes:

the terminal determines QCL information corresponding to a DMRS CDM group allocated by the network side equipment according to at least one TCI state corresponding to a target CORESET;

when the network side equipment configures a CORESET for the terminal, the target CORESET is the CORESET allocated by the network side equipment; when the network side device configures at least two CORESETs for the terminal, the target CORESET is one CORESET selected by the terminal from the at least two CORESETs.

Optionally, the terminal selects a target CORESET from the at least two CORESETs according to the following manner:

if the preset condition is the first condition or the second condition, the terminal takes the CORESET with the lowest ID in the nearest time slot containing CORESET transmission as the target CORESET;

if the preset condition is the third condition or the preset condition is the fourth condition, the terminal takes a CORESET corresponding to a PDCCH for scheduling the PDSCH as the target CORESET; wherein the PDSCH is a PDSCH demodulated according to the DMRS CDM group.

Optionally, the determining, by the terminal, QCL information corresponding to a DMRS CDM group allocated by the network side device according to at least one TCI state corresponding to the target CORESET includes:

when one TCI state corresponding to the target CORESET is detected, the terminal determines QCL information corresponding to the DMRS CDM group according to the TCI state corresponding to the target CORESET;

when the terminal is at least two TCI states corresponding to the target CORESET, the terminal selects a TCI state corresponding to the DMRS CDM group from the at least two TCI states corresponding to the target CORESET according to the corresponding relation between the TCI state and the DMRS CDM group; and determining QCL information corresponding to the DMRS CDM group according to the selected TCI state.

Optionally, the corresponding relationship between the TCI state and the DMRS CDM group is preset or indicated by the network side device.

Optionally, the determining, by the terminal, the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to the at least one TCI state corresponding to the CORESET includes:

the terminal selects a TCI state corresponding to the CORESET used for receiving the PDCCH from at least one TCI state corresponding to the CORESET according to a selection rule;

wherein, the selection rule is preset or indicated by the network side equipment.

In a third aspect, an embodiment of the present invention provides a network side device, including: a processor, a memory, and a transceiver;

a processor for reading the program in the memory and executing:

determining at least one CORESET allocated to a terminal, and determining at least one TCI state corresponding to the CORESET; and sending the determined at least one TCI state corresponding to the CORESET to the terminal through a transceiver, so that the terminal determines QCL information corresponding to a DMRS CDM group allocated by the network side equipment according to the at least one TCI state corresponding to the CORESET and/or determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH.

Optionally, the processor is specifically configured to:

and sending the determined at least one TCI state corresponding to the CORESET to the terminal through the MAC CE.

Optionally, after determining at least one TCI state corresponding to the CORESET, the processor is further configured to:

indicating the corresponding relation between the TCI state and the DMRS CDM group to the terminal so that the terminal determines the TCI state corresponding to the DMRS CDM group allocated by the network side equipment according to the corresponding relation; and/or

And indicating a selection rule to the terminal so that the terminal selects a TCI state corresponding to CORESET used for receiving the PDCCH from at least one TCI state corresponding to CORESET according to the selection rule.

In a fourth aspect, an embodiment of the present invention provides a terminal, including: a processor, a memory, and a transceiver;

a processor for reading the program in the memory and executing:

receiving at least one TCI state corresponding to CORESET sent by network side equipment through a transceiver; the network side equipment allocates at least one CORESET to the terminal;

determining QCL information corresponding to a DMRS CDM group allocated by the network side equipment according to at least one TCI state corresponding to the CORESET; and/or determining the TCI state corresponding to the CORESET used by the terminal for receiving the PDCCH according to the at least one TCI state corresponding to the CORESET.

Optionally, the processor is specifically configured to:

and receiving at least one TCI state corresponding to the CORESET sent by the network side equipment through the MAC CE.

Optionally, the processor is further configured to:

determining that a preset condition is met before determining QCL information corresponding to a DMRS (demodulation reference code) CDM (code division multiplexing) group allocated by the network side equipment according to at least one configured TCI state;

wherein the preset condition is one of the following conditions:

the method comprises the following steps that a first condition is that a time interval between DCI (downlink control information) reception and PDSCH (physical downlink shared channel) reception of a terminal is smaller than a preset threshold, and QCL (quaternary clock length) types configured for the terminal comprise preset types;

Optionally, the processor is specifically configured to:

determining QCL information corresponding to a DMRS CDM group allocated by the network side equipment according to at least one TCI state corresponding to a target CORESET;

Optionally, the processor is specifically configured to:

selecting a target CORESET from the at least two CORESETs according to the following manner:

if the preset condition is the first condition or the second condition, taking the CORESET with the lowest ID in the latest time slot containing CORESET transmission as the target CORESET;

if the preset condition is the third condition or the preset condition is the fourth condition, taking a CORESET corresponding to a PDCCH for scheduling the PDSCH as the target CORESET; wherein the PDSCH is a PDSCH demodulated according to the DMRS CDM group.

Optionally, the processor is specifically configured to:

when one TCI state corresponding to the target CORESET is detected, determining QCL information corresponding to the DMRS CDM group according to the TCI state corresponding to the target CORESET;

when at least two TCI states corresponding to the target CORESET are in correspondence, selecting the TCI state corresponding to the DMRS CDM group from the at least two TCI states corresponding to the target CORESET according to the correspondence between the TCI states and the DMRS CDM group; and determining QCL information corresponding to the DMRS CDM group according to the selected TCI state.

Optionally, the processor is specifically configured to:

selecting a TCI state corresponding to CORESET used for receiving the PDCCH from at least one TCI state corresponding to CORESET according to a selection rule;

In a fifth aspect, another network-side device provided in the embodiment of the present invention includes:

the terminal comprises a first determining module, a second determining module and a third determining module, wherein the first determining module is used for determining at least one CORESET distributed for the terminal and determining at least one TCI state corresponding to the CORESET;

and the sending module is used for sending the determined at least one TCI state corresponding to the CORESET to the terminal so that the terminal determines QCL information corresponding to a DMRS CDM group allocated by the network side equipment according to the at least one TCI state corresponding to the CORESET and/or determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH.

In a sixth aspect, another terminal provided in the embodiment of the present invention includes:

the receiving module is used for receiving at least one TCI state corresponding to CORESET sent by network side equipment; the network side equipment allocates at least one CORESET to the terminal;

a second determining module, configured to determine, according to at least one TCI state corresponding to the CORESET, QCL information corresponding to a DMRS CDM group allocated by the network side device; and/or the terminal determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to the at least one TCI state corresponding to the CORESET.

Embodiments of the present invention also provide a computer-readable medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method according to the first aspect or implements the steps of the method according to the second aspect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1A and fig. 1B are schematic diagrams of DMRS resources of DMRS type 1 in an embodiment of the present invention;

fig. 2A and fig. 2B are schematic diagrams of DMRS resources of DMRS type 2 in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a transmission configuration indication system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first network-side device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a first terminal according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a second network-side device according to an embodiment of the present invention;

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

fig. 8 is a flowchart of a first method for indicating transmission configuration according to the embodiment of the present invention;

fig. 9 is a flowchart of a second transmission configuration indication method according to the embodiment of the present invention.

Detailed Description

Hereinafter, some terms in the embodiments of the present invention are explained to facilitate understanding by those skilled in the art.

(1) In the embodiments of the present invention, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning.

(2) In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

(3) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The terminal of the embodiment of the invention is a device with a wireless communication function, can be deployed on land and comprises an indoor or outdoor terminal, a handheld terminal or a vehicle-mounted terminal; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal may be a Mobile Phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in Industrial Control (Industrial Control), a wireless terminal in unmanned Driving (Self Driving), a wireless terminal in Remote Medical treatment (Remote Medical), a wireless terminal in Smart Grid (Smart Grid), a wireless terminal in Transportation Safety (Transportation Safety), a wireless terminal in Smart City (Smart City), a wireless terminal in Smart Home (Smart Home), etc.; but also UEs of various forms, Mobile Stations (MS), the Terminal devices (Terminal devices).

The network side device of the embodiment of the present invention is a device for providing a wireless communication function for the terminal, and includes but is not limited to: a gbb in 5G, a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a Home Base Station (e.g., Home Evolved NodeB or Home Node B, HNB), a baseband Unit (Base Band Unit, BBU), a TRP, a Transmission Point (TP), a mobile switching center, and the like.

The DMRS ports are multiplexed by FDM (Frequency-division multiplexing) + CDM, and each CDM group is divided into a plurality of DMRS ports by OCC (Orthogonal Code division multiplexing). The NR system supports two DMRS pilot types (DMRS pilot type 1 and pilot type 2), and the multiplexing and configuration of the two DMRS pilot types are described in detail as follows:

DMRS pilot type 1, as shown in fig. 1A and 1B, where a preamble symbol (front-load symbols) is divided into two CDM groups, as shown in fig. 1A, when only one (single) preamble symbol is configured (corresponding to OFDM (Orthogonal Frequency Division Multiplexing) symbol numbered 3, horizontal axis in the figure), subcarriers of the OFDM symbol (vertical axis in the figure) are divided into two groups, that is, the OFDM symbol is divided into two CDM groups, each CDM group corresponds to a single OFDM symbol and supports 2-port Multiplexing by an OCC method, as shown in fig. 1A, one CDM group is a DMRS Resource (REs) supporting an antenna port 0/1, and one CDM group is a DMRS REs supporting an antenna port 2/3; as shown in fig. 1B, when two (dual) preamble symbols are configured (corresponding to OFDM symbols numbered 3 and 4), the subcarriers of the OFDM symbols are divided into two groups, that is, the OFDM symbols are divided into two CDM groups, each CDM group corresponds to a dual OFDM symbol, and 4-port multiplexing is supported by the OCC manner, see, as shown in fig. 1B, one CDM group is DMRS REs supporting antenna port 0/1/4/5, and one CDM group is DMRS REs supporting antenna port 2/3/6/7.

DMRS pilot type 2, as shown in fig. 2A and 2B, where a preamble symbol is divided into three CDM groups, as shown in fig. 2A, when only one (single) preamble symbol is configured (corresponding to OFDM numbered 3), subcarriers of the OFDM symbol are divided into three groups, each group is formed by two adjacent subcarriers, that is, the OFDM symbol is divided into three CDM groups, each CDM group corresponds to a single OFDM symbol, and supports 2-port multiplexing by an OCC manner, as shown in fig. 2A, one CDM group is DMRS REs supporting antenna port 0/1, one CDM group is DMRS REs supporting antenna port 2/3, and one CDM group is DMRS REs supporting antenna port 4/5; referring to fig. 2B, when two (dual) preamble symbols are configured (corresponding to OFDM symbols numbered 3 and 4), subcarriers of the OFDM symbols are divided into three groups, each group is formed by two adjacent subcarriers, that is, the OFDM symbols are divided into three CDM groups, each CDM group corresponds to a dual OFDM symbol and supports 4-port multiplexing by the OCC method, referring to fig. 2B, where one CDM group is a DMRS REs supporting an antenna port 0/1/6/7, one CDM group is a DMRS REs supporting an antenna port 2/3/8/9, and one CDM group is a DMRS REs supporting an antenna port 4/5/10/11.

QCL, a state assumption between antenna ports, means that if one antenna port is quasi co-located with another antenna port, the large scale parameters of the signal received by one antenna port can be inferred, in whole or in part, from the large scale parameters of the signal received by another antenna port. The large-scale parameters comprise one or more of delay spread, Doppler shift, spatial receiving parameters, average channel gain, average delay and the like.

QCL comes with CoMP technology, and multiple TRPs or antenna panels involved in CoMP may correspond to multiple sectors with different geographical TRPs or antenna panels oriented differently. For example, when a terminal receives data from different TRPs or antenna panels, the spatial differences of the TRPs or antenna panels may result in differences of large-scale channel parameters of the receive chains from the different TRPs or antenna panels, such as doppler frequency offset, delay spread, etc. The large-scale parameters of the channel directly affect the adjustment and optimization of the filter coefficients during channel estimation, and different channel estimation filtering parameters should be used to adapt to the corresponding channel propagation characteristics corresponding to different TRPs or signals emitted from the antenna panel. Therefore, although the spatial position or angle difference of each TRP or antenna panel is transparent to the terminal and the multipoint transmission operation itself, the effect of the spatial difference on the large-scale parameters of the channel is an important factor to be considered when the terminal performs channel estimation and reception detection. By two antenna ports QCL in the sense of certain large scale parameters, it is meant that these large scale parameters of the two antenna ports are the same. Alternatively, the terminal may consider two antenna ports to originate from the same location (i.e., quasi co-site) as long as some of the large-scale parameters of the two ports are consistent, regardless of differences in their actual physical locations or corresponding antenna panel orientations.

For some typical application scenarios, considering possible QCL relationships between various reference signals, from the perspective of simplified signaling, an NR system divides several channel large-scale parameters into the following 4 types, corresponding to 4 QCL types, so that the system can be configured or instructed according to different scenarios:

QCL type A (QCL-type A) the parameters involved in a QCL of this type include: { Doppler (Doppler) shift, Doppler spread, average delay, delay spread }. The large-scale parameters other than the spatial reception parameter are the same. For frequency bands below 6GHz, spatial reception parameters may not be required.

QCL type B (QCL-TypeB) the parameters involved in this type of QCL include: { Doppler shift, Doppler spread }. The following two cases are only aimed at the frequency bands below 6 GHz:

case 1: when a narrow-beam reference signal is used, the wide-beam reference signal may be a QCL reference. For example, TRS (tracking reference signal) is generally transmitted in a wide beam at a sector level, and CSI-RS (channel state information-reference signals) may be transmitted in a narrow beam. In this case, it is generally assumed that the doppler parameters experienced by signals transmitted from the same site (e.g., TRP or antenna panel) are still approximately uniform. However, the scatterers covered by the beams with different widths are different, and therefore, the scatterers have a significant influence on the delay spread and the average delay parameter experienced by the signal propagation. In this case, the QCL cannot be assumed in the sense of delay spread and average delay parameters for CSI-RS and TRS.

Case 2: the time domain density of the target reference signal is insufficient, but the frequency domain density is sufficient. For example, with the TRS as the QCL reference for the CSI-RS, the Doppler parameters may be obtained from the TRS with which the QCL is associated, since the time-domain density of the CSI-RS may not be sufficient to accurately estimate the Doppler parameters of the channel, depending on the configuration. On the other hand, the frequency domain density of the CSI-RS is enough for estimating frequency domain parameters such as average delay and delay spread, so that the parameters can be obtained from the CSI-RS.

QCL type C (QCL-type C), the parameters related to this type of QCL include: { Doppler shift, average delay }. Only for the case of the frequency band above 6GHz with SSB (synchronization single block) as QCL reference. Because the SSB has limited resources and density, it is generally assumed that only some relatively coarse large-scale information, i.e., doppler shift and average delay, can be obtained from the SSB, while other large-scale parameters need to be obtained from the target reference signal itself.

QCL type D (QCL-type D) the parameters involved in this type of QCL include: { spatial reception parameter }. As mentioned before, since this parameter is mainly for the frequency band above 6GHz, it is regarded as one QCL type alone.

In an application scenario of NC-JT transmission, a network side device allocates one or more TRPs to a terminal, and the terminal establishes a connection with the one or more TRPs, but in the prior art, there is no transmission configuration indication method for NC-JT transmission at present, the terminal cannot select a TCI state for a DMRS CDM group, and further, the terminal cannot determine QCL information corresponding to the DMRS CDM group.

In addition, in an NC-JT transmission application scenario, when a network side device indicates a TCI state through a CORESET, since the network side device allocates one or more TRPs to a terminal, one or more TCI states are indicated in each CORESET. After the terminal receives the CORESET indicating one or more TCI states, the terminal cannot determine the TCI state corresponding to the CORESET used when receiving the PDCCH.

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. 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.

As shown in fig. 3, a transmission configuration indication system according to an embodiment of the present invention includes a network side device 10 and a terminal 20;

the network side device 10 is configured to determine at least one core set allocated to the terminal, and determine at least one TCI state corresponding to the core set; and sending the determined at least one TCI state corresponding to the CORESET to the terminal, so that the terminal determines QCL information corresponding to a DMRS CDM group allocated by the network side equipment according to the configured at least one TCI state and/or determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH.

The terminal 20 is configured to receive at least one TCI state corresponding to the CORESET sent by the network side device; the network side equipment allocates at least one CORESET to the terminal; determining QCL information corresponding to a DMRS CDM group allocated by the network side equipment according to the configured at least one TCI state; and/or determining the TCI state corresponding to the CORESET used by the terminal for receiving the PDCCH according to the at least one TCI state corresponding to the CORESET.

It should be noted that, the network side device in the embodiment of the present invention configures one or more CORESET for the terminal; and the network side equipment determines at least one TCI state corresponding to each CORESET.

For example, if there are two TRPs allocated to the terminal, the terminal establishes a connection with the two TRPs; the network side device determines that the CORESET allocated to the terminal corresponds to two TCI states.

It should be noted here that, in the embodiment of the present invention, the access network device allocates the TRPs to the terminal, and the number of the TRPs allocated to the terminal is determined by the access network device; or, in the embodiment of the present invention, the core network device allocates the TRP to the terminal, and the number of the TRP allocated to the terminal is determined by the core network device.

An optional implementation manner is that the network side device determines at least one TCI state corresponding to core set of the terminal according to the following manner:

the network side equipment determines a group of available TCI states configured for the terminal; the network side equipment determines at least one TCI state corresponding to each CORESET from a group of available TCI states configured for the terminal.

In addition, the network side equipment sends a group of available TCI states configured for the terminal to the terminal through RRC signaling;

optionally, the network side device sends the determined at least one TCI state corresponding to the CORESET to the terminal through the MAC CE;

correspondingly, the terminal receives at least one TCI state corresponding to the CORESET sent by the network side device through the MAC CE.

After receiving at least one TCI state corresponding to the CORESET sent by the network side device, the terminal performs the following partial or all operations according to the received at least one TCI state corresponding to the CORESET:

1. the terminal determines QCL information corresponding to a DMRS CDM group allocated by network side equipment according to at least one TCI state corresponding to CORESET;

2. and the terminal determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH.

When the terminal determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to the received at least one TCI state corresponding to the CORESET, an optional implementation manner is as follows:

It should be noted here that, when the selection rule is indicated by the network side device, the network side device sends the selection rule to the terminal after determining at least one TCI state corresponding to CORESET; and the terminal selects the TCI state corresponding to the CORESET used for receiving the PDCCH from at least one TCI state corresponding to the CORESET according to the selection rule indicated by the network side equipment.

In addition, the terminal can determine QCL information corresponding to the DMRS CDM group allocated by the network side device according to at least one TCI state corresponding to CORESET.

The mode for determining the QCL information by the terminal in the embodiment of the present invention includes, but is not limited to:

1. the terminal determines QCL information according to TCI information contained in the received DCI;

2. and the terminal determines QCL information according to at least one TCI state corresponding to CORESET.

In implementation, the terminal determines the adopted mode for determining the QCL information according to the satisfied conditions.

One optional mode is that when the terminal determines that the preset condition is met, the terminal determines QCL information according to at least one TCI state corresponding to CORESET;

wherein the preset condition is one of the following conditions:

in the first condition, a time interval between the reception of DCI by the terminal and the reception of a PDSCH (physical downlink shared channel) is smaller than a preset threshold, and a QCL type configured for the terminal includes a preset type.

And secondly, the time interval between the DCI received by the terminal and the PDSCH received by the terminal is smaller than a preset threshold, the QCL type configured for the terminal does not contain a preset type, and the received DCI does not contain a TCI information domain.

Optionally, the preset type is QCL type D;

wherein, the parameters related to the QCL of QCL type D include: { spatial reception parameters }, mainly for frequency bands above 6 GHz.

And thirdly, the time interval between the terminal receiving the DCI and the data transmitted by the PDSCH is not less than a preset threshold, and the received DCI does not contain a TCI information domain.

The terminal receives the DCI and receives the data transmitted by the PDSCH, wherein the time interval between the DCI and the data transmitted by the PDSCH is not less than a preset threshold value, and the DCI format of the PDCCH for dispatching the PDSCH is a preset format;

optionally, the preset format is DCI format 1-0.

In addition, the terminal can also determine QCL information according to the TCI information contained in the received DCI;

it should be noted here that the condition that the terminal needs to satisfy the manner of determining the QCL information according to the TCI information included in the received DCI is the same as that in the prior art, and the manner of determining the QCL information according to the TCI information included in the received DCI may also be the conventional manner, which is not described in detail herein.

The method for determining QCL information according to at least one TCI state corresponding to CORESET by the terminal is described in detail below.

After the terminal determines that the first preset condition is met, the terminal determines the QCL information corresponding to the DMRS and CDM group allocated by the network side equipment according to the received at least one TCI state corresponding to the CORESET sent by the network side equipment. An optional implementation manner is that the terminal determines QCL information corresponding to a DMRS CDM group allocated by the network side device according to the following manner:

when the network side equipment allocates one CORESET to the terminal, the target CORESET is the CORESET allocated by the network side equipment; when the network side device allocates at least two CORESETs to the terminal, the target CORESET is one selected by the terminal from the at least two CORESETs.

Next, a method for the terminal to determine QCL information corresponding to a DMRS CDM group will be described with respect to the number of CORESET allocated to the terminal by the network side device.

Firstly, the network side equipment allocates a CORESET for the terminal.

When the network side equipment allocates a CORESET for the terminal, the terminal determines QCL information corresponding to a DMRS CDM group according to at least one TCI state corresponding to the CORESET;

it should be noted that the DMRS CDM group allocated by the network side device to the terminal may be one or more; when there are a plurality of DMRS CDM groups allocated to the terminal, the terminal determines QCL information corresponding to each DMRS CDM group.

One alternative is:

1. when the CORESET allocated to the terminal corresponds to one TCI state, the terminal determines QCL information corresponding to the DMRS CDM group according to the TCI state corresponding to the allocated CORESET;

specifically, the terminal determines QCL information according to a TCI state corresponding to the CORESET, and the determined QCL information is used as QCL information corresponding to a DMRS CDM group;

and if a plurality of DMRS CDM groups are allocated to the terminal, using the QCL information determined according to one TCI state corresponding to CORESET as the QCL information of each DMRS CDM group.

For example, when the number of TRPs allocated to a terminal is one and a CORESET is allocated to the terminal, the CORESET allocated to the terminal corresponds to one TCI state; assuming that the CORESET configured for the terminal is CORESET A, wherein the CORESET A corresponds to the first TCI state; determining QCL information according to a first TCI state corresponding to CORESET A, and using the determined QCL information as QCL information corresponding to a DMRS CDM group.

2. When at least two TCI states corresponding to CORESET allocated to the terminal, the terminal selects a TCI state corresponding to the DMRS CDM group from the at least two TCI states corresponding to the CORESET allocated to the terminal according to the corresponding relation between the TCI states and the DMRS CDM group, and determines QCL information corresponding to the DMRS CDM group according to the selected TCI state.

Wherein, the corresponding relation between the TCI state and the DMRS CDM group is preset or indicated by the network side equipment.

When the corresponding relation between the TCI state and the DMRS CDM group is indicated by the network side equipment, after the network side equipment determines at least one TCI state corresponding to each CORESET, the network side equipment indicates the corresponding relation between the TCI state and the DMRS CDM group to the terminal;

correspondingly, the terminal receives the corresponding relation between the TCI state indicated by the network side equipment and the DMRS CDM group, and determines the QCL information corresponding to the DMRS CDM group according to the corresponding relation between the TCI state indicated by the network side equipment and the DMRS CDM group.

It should be noted that the correspondence between the TCI state and the DMRS CDM group is used to indicate a rule for the terminal to select the DMRS CDM group for the DMRS CDM group; the number of the TCI states corresponding to the target CORESET and the number of the DMRS CDM groups may be the same, or the number of the TCI states corresponding to the target CORESET is less than the number of the DMRS CDM groups, or the number of the TCI states corresponding to the target CORESET is greater than the number of the DMRS CDM groups.

In implementation, when the terminal selects a TCI state corresponding to the DMRS CDM group from at least two TCI states corresponding to a CORESET allocated to the terminal according to a correspondence between the TCI states and the DMRS CDM group, one TCI state corresponding to the CORESET allocated to the terminal may be used as the TCI state corresponding to one or more DMRS CDM groups;

for example, the CORESET allocated to the terminal corresponds to two TCI states, which are a first TCI state and a second TCI state respectively; the terminal is allocated with two DMRS CDM groups, namely a first DMRS CDM group and a second DMRS CDM group; when the terminal selects the TCI state corresponding to the DMRS CDM group from the TCI states corresponding to CORESET, one way is: taking the first TCI state as the TCI state corresponding to the first DMRS CDM group, and taking the second TCI state as the TCI state corresponding to the second DMRS CDM group; or the other way is: the first TCI state is taken as the TCI state corresponding to the first DMRS CDM group, and the first TCI state is taken as the TCI state corresponding to the second DMRS CDM group.

After determining the TCI state corresponding to each DMRS CDM group, the terminal determines QCL information corresponding to the DMRS CDM group according to the TCI state corresponding to the DMRS CDM group for any DMRS CDM group.

And secondly, the network side equipment allocates at least two CORESETs for the terminal.

When the network side equipment allocates at least two CORESETs for the terminal, the terminal determines a target CORESET from the at least two CORESETs. And when the preset conditions met by the terminal are different, the terminal determines the target CORESET from at least two CORESETs in different modes. The following are described separately:

in the mode 1, the terminal determines that the preset condition is the first condition or the second condition;

that is to say, the terminal determines that a time interval between receiving the DCI and receiving the data transmitted by the PDSCH is smaller than a preset threshold, and the QCL type configured for the terminal includes a preset type; or, the terminal determines that a time interval between receiving the DCI and receiving the data transmitted by the PDSCH is smaller than a preset threshold, and the QCL type configured for the terminal does not include the preset type, and the received DCI does not include the TCI information field.

The terminal determines the target CORESET according to the following modes:

and the terminal takes the CORESET with the lowest ID (Identity) in the latest time slot containing CORESET transmission as the target CORESET.

In the mode 2, the terminal determines that the preset condition is the third condition or the fourth condition;

that is, the terminal determines that the time interval between receiving the DCI and receiving the PDSCH is not less than the preset threshold, and the received DCI does not include the TCI information field; or, the terminal determines that the time interval between the reception of the DCI and the reception of the PDSCH is not less than a preset threshold, and the DCI format of the PDCCH for scheduling the PDSCH is a preset format.

The terminal determines the target CORESET according to the following modes:

the terminal takes the CORESET corresponding to the PDCCH for scheduling the PDSCH as the target CORESET; wherein the PDSCH is a PDSCH demodulated according to the DMRS CDM group.

After determining the target CORESET, the terminal determines QCL information corresponding to the DMRS CDM group according to at least one TCI state corresponding to the target CORESET;

One alternative is:

1. when a target CORESET corresponds to one TCI state, the terminal determines QCL information corresponding to the DMRS CDM group according to the TCI state corresponding to the target CORESET;

specifically, the terminal determines QCL information according to a TCI state corresponding to a target CORESET, and the determined QCL information is used as QCL information corresponding to a DMRS CDM group;

and if a plurality of DMRS CDM groups are allocated to the terminal, using the QCL information determined according to one TCI state corresponding to the target CORESET as the QCL information of each DMRS CDM group.

For example, when the number of TRPs allocated to a terminal is one, each CORESET corresponds to one TCI state; assuming that CORESET configured for the terminal is respectively: CORESET A, CORESET B and CORESET C, wherein the CORESET A corresponds to a first TCI state, the CORESET B corresponds to a second TCI state, and the CORESET C corresponds to a third TCI state; and determining that the CORESET with the lowest ID in the time slot containing CORESET transmission is CORESET A, then taking the CORESET A as the target CORESET, then determining QCL information according to the first TCI state corresponding to the CORESET A, and taking the determined QCL information as QCL information corresponding to the DMRS CDM group.

2. When a target CORESET corresponds to at least two TCI states, a terminal selects a TCI state corresponding to a DMRS CDM group from the at least two TCI states corresponding to the target CORESET according to the corresponding relation between the TCI state and the DMRS CDM group; and determining QCL information corresponding to the DMRS CDM group according to the selected TCI state.

When the corresponding relation between the TCI state and the DMRS CDM group is indicated by the network side equipment, after the network side equipment determines at least one TCI state corresponding to each CORESET, the network side equipment sends the corresponding relation between the TCI state and the DMRS CDM group to the terminal;

Optionally, the network side device indicates the correspondence between the TCI state and the DMRS CDM group to the terminal through DCI signaling.

In implementation, when the terminal selects a TCI state corresponding to the DMRS CDM group from at least two TCI states corresponding to a target CORESET according to a correspondence between the TCI state and the DMRS CDM group, the terminal may use one TCI state corresponding to the target CORESET as a TCI state corresponding to one or more DMRS CDM groups;

for example, the target CORESET corresponds to two TCI states, namely a first TCI state and a second TCI state; the terminal is allocated with two DMRS CDM groups, namely a first DMRS CDM group and a second DMRS CDM group; when the terminal selects the TCI state corresponding to the DMRS CDM group from the TCI states corresponding to the target CORESET, one way is: taking the first TCI state as the TCI state corresponding to the first DMRS CDM group, and taking the second TCI state as the TCI state corresponding to the second DMRS CDM group; or the other way is: the first TCI state is taken as the TCI state corresponding to the first DMRS CDM group, and the first TCI state is taken as the TCI state corresponding to the second DMRS CDM group.

For another example, the target CORESET corresponds to two TCI states, namely a first TCI state and a second TCI state; the terminal is allocated with three DMRS CDM groups, namely a first DMRS CDM group, a second DMRS CDM group and a third DMRS CDM group; when the terminal selects the TCI state corresponding to the DMRS CDM group from the TCI states corresponding to the target CORESET, one way is: taking the first TCI state as the TCI state corresponding to the first DMRS CDM group, the second TCI state as the TCI state corresponding to the second DMRS CDM group, and the first TCI state as the TCI state corresponding to the third DMRS CDM group; or the other way is: and setting the first TCI state as the TCI state corresponding to the first DMRS CDM group, the second TCI state as the TCI state corresponding to the second DMRS CDM group, and the second TCI state as the TCI state corresponding to the third DMRS CDM group.

When a terminal has multiple DMRS CDM groups, QCL information corresponding to each DMRS CDM group needs to be determined.

As shown in fig. 4, a first network-side device according to an embodiment of the present invention includes a processor 400, a memory 401, and a transceiver 402;

the processor 400 is responsible for managing the bus architecture and general processing, and the memory 401 may store data used by the processor 1200 in performing operations. The transceiver 402 is used to receive and transmit data under the control of the processor 400.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 400, and various circuits, represented by memory 401, 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 processor 400 is responsible for managing the bus architecture and general processing, and the memory 401 may store data used by the processor 400 in performing operations.

The processes disclosed in the embodiments of the present invention may be applied to the processor 400, or implemented by the processor 400. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 400. The processor 400 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or 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 processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 401, and the processor 400 reads the information in the memory 401 and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 400 is configured to read the program in the memory 401 and execute:

determining at least one CORESET allocated to a terminal, and determining at least one TCI state corresponding to the CORESET; and sending the determined at least one TCI state corresponding to the CORESET to the terminal through a transceiver 402, so that the terminal determines QCL information corresponding to a DMRS CDM group allocated by the network side equipment according to the at least one TCI state corresponding to the CORESET and/or determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH.

Optionally, the processor 400 is specifically configured to:

Optionally, after determining at least one TCI state corresponding to the CORESET, the processor 400 is further configured to:

And sending the selection rule to the terminal through a transceiver 402, so that the terminal selects the TCI state corresponding to the CORESET used for receiving the PDCCH from at least one TCI state corresponding to the CORESET according to the selection rule.

As shown in fig. 5, a first terminal according to an embodiment of the present invention includes a processor 500, a memory 501, and a transceiver 502;

the processor 500 is responsible for managing the bus architecture and general processing, and the memory 501 may store data used by the processor 500 in performing operations. The transceiver 502 is used to receive and transmit data under the control of the processor 500.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 500 and various circuits of memory represented by memory 501 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 processor 500 is responsible for managing the bus architecture and general processing, and the memory 501 may store data used by the processor 500 in performing operations.

The processes disclosed in the embodiments of the present invention may be applied to the processor 500, or implemented by the processor 500. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 500. The processor 500 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or 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 processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 501, and the processor 500 reads the information in the memory 501, and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 500 is configured to read the program in the memory 501 and execute:

receiving at least one TCI state corresponding to CORESET sent by a network side device through the transceiver 502; the network side equipment allocates at least one CORESET to the terminal;

Optionally, the processor 500 is specifically configured to:

Optionally, the processor 500 is further configured to:

wherein the preset condition is one of the following conditions:

Optionally, the processor 500 is specifically configured to:

As shown in fig. 6, a second network-side device according to the embodiment of the present invention includes:

a first determining module 601, configured to determine at least one core set allocated to a terminal, and determine at least one TCI state corresponding to the core set;

a sending module 602, configured to send the determined at least one TCI state corresponding to CORESET to the terminal, so that the terminal determines, according to the at least one TCI state corresponding to CORESET, QCL information corresponding to a DMRS CDM group allocated by the network side device and/or determines a TCI state corresponding to CORESET used when the terminal receives a PDCCH.

Optionally, the sending module 602 is specifically configured to:

Optionally, after the first determining module 601 determines at least one TCI state corresponding to the CORESET, the sending module 602 is further configured to:

And sending a selection rule to the terminal so that the terminal selects a TCI state corresponding to CORESET used for receiving the PDCCH from at least one TCI state corresponding to CORESET according to the selection rule.

As shown in fig. 7, a second terminal according to an embodiment of the present invention includes:

a receiving module 701, configured to receive at least one TCI state corresponding to core set sent by a network side device; the network side equipment allocates at least one CORESET to the terminal;

a second determining module 702, configured to determine, according to at least one TCI state corresponding to the CORESET, QCL information corresponding to a DMRS CDM group allocated by the network side device; and/or the terminal determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to the at least one TCI state corresponding to the CORESET.

Optionally, the receiving module 701 is specifically configured to:

Optionally, the second determining module 702 is further configured to:

wherein the preset condition is one of the following conditions:

Optionally, the second determining module 702 is specifically configured to:

if the preset condition is the third condition or the preset condition is the fourth condition, scheduling the CORESET corresponding to the PDCCH of the PDSCH as the target CORESET; wherein the PDSCH is a PDSCH demodulated according to the DMRS CDM group.

Optionally, the second determining module 702 is specifically configured to:

Based on the same inventive concept, the embodiment of the present invention provides a transmission configuration indication method, and since the device corresponding to the method is the network side device of the embodiment of the present invention, and the principle of the device for solving the problem is similar to the method, the implementation of the method may refer to the implementation of the network side device, and repeated details are not repeated.

As shown in fig. 8, a method for indicating transmission configuration provided in an embodiment of the present invention specifically includes the following steps:

step 800, a network side device determines at least one CORESET allocated to a terminal, and determines at least one TCI state corresponding to the CORESET;

step 801, the network side device sends the determined at least one TCI state corresponding to the CORESET to the terminal, so that the terminal determines, according to the at least one TCI state corresponding to the CORESET, QCL information corresponding to a DMRS CDM group allocated by the network side device and/or determines a TCI state corresponding to the CORESET used when the terminal receives a PDCCH.

and the network side equipment sends the determined at least one TCI state corresponding to the CORESET to the terminal through the MAC CE.

And the network side equipment sends a selection rule to the terminal so that the terminal selects a TCI state corresponding to CORESET used for receiving the PDCCH from at least one TCI state corresponding to CORESET according to the selection rule.

Based on the same inventive concept, the embodiment of the present invention further provides a transmission configuration indication method, and since the device corresponding to the method is the terminal of the embodiment of the present invention, and the principle of the terminal for solving the problem is similar to the method, the implementation of the method can refer to the implementation at the terminal side, and repeated details are not repeated.

As shown in fig. 9, a method for indicating transmission configuration provided in an embodiment of the present invention specifically includes the following steps:

step 900, the terminal receives at least one TCI state corresponding to the CORESET sent by the network side device; the network side equipment allocates at least one CORESET to the terminal;

step 901, the terminal determines QCL information corresponding to a DMRS CDM group allocated by the network side device according to at least one TCI state corresponding to the CORESET; and/or the terminal determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to the at least one TCI state corresponding to the CORESET.

Embodiments of the present invention further provide a computer-readable medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method described in the foregoing network-side device.

Embodiments of the present invention also provide a computer-readable medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method described above at the terminal side.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for indicating a transmission configuration, the method comprising:

the method comprises the steps that network side equipment determines at least one control resource set (CORESET) distributed for a terminal and determines at least one transmission configuration indication condition (TCI state) corresponding to the CORESET;

the network side equipment sends the determined at least one TCI state corresponding to the CORESET to the terminal, so that the terminal determines quasi co-location QCL information corresponding to a demodulation reference signal DMRS Code Division Multiplexing (CDM) group allocated by the network side equipment according to the at least one TCI state corresponding to the CORESET and/or determines the TCI state corresponding to the CORESET used when the terminal receives a Physical Downlink Control Channel (PDCCH);

after the network side device determines at least one TCI state corresponding to the CORESET, the method further includes:

2. The method of claim 1, wherein the number of TCI states corresponding to CORESET is determined according to the number of TRPs allocated to the terminal.

3. The method of claim 1, wherein the step of sending, by the network side device, the determined at least one TCI state corresponding to the CORESET to the terminal comprises:

and the network side equipment sends the determined at least one TCI state corresponding to the CORESET to the terminal through a media access control unit (MAC CE).

4. A method for indicating a transmission configuration, the method comprising:

a terminal receives at least one transmission configuration indication condition TCI state corresponding to a control resource set CORESET sent by network side equipment; the network side equipment allocates at least one CORESET to the terminal;

the terminal determines quasi co-location QCL information corresponding to a demodulation reference signal DMRS code division multiplexing CDM group allocated by the network side equipment according to at least one TCI state corresponding to the CORESET; and/or the terminal determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to at least one TCI state corresponding to the CORESET;

the determining, by the terminal, the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to the at least one TCI state corresponding to the CORESET includes:

5. The method of claim 4, wherein the number of TCI states corresponding to CORESET is determined according to the number of TRP (transmission reception point) allocated to the terminal.

6. The method of claim 4, wherein the receiving, by the terminal, at least one TCI state corresponding to CORESET sent by the network side device includes:

and the terminal receives at least one TCI state corresponding to CORESET sent by the network side equipment through a media access control unit (MAC CE).

7. The method of claim 4, wherein before the terminal determines the QCL information corresponding to the DMRS CDM group allocated by the network side device according to the configured at least one TCI state, the method further comprises:

the method comprises the following steps that a first condition is that a time interval between the terminal receiving Downlink Control Information (DCI) and receiving a Physical Downlink Shared Channel (PDSCH) is smaller than a preset threshold value, and a QCL type configured for the terminal comprises a preset type;

8. The method of claim 7, wherein the determining, by the terminal, the QCL information corresponding to the DMRS CDM group allocated by the network-side device according to the at least one TCI state corresponding to the CORESET comprises:

9. The method of claim 8, wherein the terminal selects a target CORESET from the at least two CORESETs according to:

if the preset condition is the first condition or the second condition, the terminal takes the CORESET with the lowest identification ID in the latest time slot containing CORESET transmission as the target CORESET;

10. The method of claim 8, wherein the determining, by the terminal, the QCL information corresponding to the DMRS CDM group allocated by the network-side device according to the at least one TCI state corresponding to the target CORESET comprises:

11. The method of claim 10, wherein the correspondence of the TCI state to DMRS CDM group is pre-set or indicated by the network side device.

12. A network side device, characterized in that the network side device comprises: a processor, a memory, and a transceiver;

a processor for reading the program in the memory and executing:

determining at least one control resource set (CORESET) allocated to a terminal, and determining at least one Transmission Configuration Indication (TCI) state corresponding to the CORESET; sending the determined at least one TCI state corresponding to the CORESET to the terminal through a transceiver, so that the terminal determines QCL information corresponding to a demodulation reference signal DMRS Code Division Multiplexing (CDM) group allocated by the network side equipment according to the at least one TCI state corresponding to the CORESET and/or determines the TCI state corresponding to the CORESET used when the terminal receives a Physical Downlink Control Channel (PDCCH);

wherein, after determining at least one TCI state corresponding to the CORESET, the processor is further configured to:

13. The network side device of claim 12, wherein the number of TCI states corresponding to CORESET is determined according to the number of transmission reception points TRP allocated to the terminal.

14. The network-side device of claim 12, wherein the processor is specifically configured to:

and sending the determined at least one TCI state corresponding to the CORESET to the terminal through a media access control unit (MAC CE).

15. A terminal, characterized in that the terminal comprises: a processor, a memory, and a transceiver;

a processor for reading the program in the memory and executing:

receiving at least one transmission configuration indication condition TCI state corresponding to a control resource set CORESET sent by network side equipment through a transceiver; the network side equipment allocates at least one CORESET to the terminal;

determining quasi co-location QCL information corresponding to a demodulation reference signal DMRS Code Division Multiplexing (CDM) group allocated by the network side equipment according to at least one TCI state corresponding to the CORESET; and/or determining the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to at least one TCI state corresponding to the CORESET;

wherein the processor is specifically configured to:

16. The terminal of claim 15, wherein the number of TCI states corresponding to CORESET is determined according to the number of TRPs allocated to the terminal.

17. The terminal of claim 15, wherein the processor is further configured to:

and receiving at least one TCI state corresponding to the CORESET sent by the network side equipment through a media access control element (MAC CE).

18. The terminal of claim 15, wherein the processor is further configured to:

wherein the preset condition is one of the following conditions:

the method comprises the following steps that firstly, the time interval between the time when the terminal receives Downlink Control Information (DCI) and the time when the terminal receives a Physical Downlink Shared Channel (PDSCH) is smaller than a preset threshold value, and the QCL type configured for the terminal comprises a preset type;

19. The terminal of claim 18, wherein the processor is further configured to:

20. The terminal of claim 19, wherein the processor is further configured to:

if the preset condition is the first condition or the second condition, taking the CORESET with the lowest identification ID in the latest time slot containing CORESET transmission as the target CORESET;

21. The terminal of claim 19, wherein the processor is further configured to:

22. The terminal of claim 21, wherein the correspondence of the TCI state to DMRS CDM group is pre-set or indicated by the network side device.

23. A network-side device, comprising:

the terminal comprises a first determining module, a second determining module and a transmitting module, wherein the first determining module is used for determining at least one control resource set CORESET allocated to the terminal and determining at least one transmission configuration indication condition TCI state corresponding to the CORESET;

a sending module, configured to send the determined at least one TCI state corresponding to the CORESET to the terminal, so that the terminal determines, according to the at least one TCI state corresponding to the CORESET, QCL information corresponding to a demodulation reference signal DMRS Code Division Multiplexing (CDM) group allocated by the network side device and/or determines a TCI state corresponding to the CORESET used when the terminal receives a Physical Downlink Control Channel (PDCCH);

after determining at least one TCI state corresponding to the CORESET, the first determining module is further configured to:

24. A terminal, comprising:

the receiving module is used for receiving at least one transmission configuration indication condition TCI state corresponding to a control resource set CORESET sent by network side equipment; the network side equipment allocates at least one CORESET to the terminal;

a second determining module, configured to determine, according to at least one TCI state corresponding to the CORESET, QCL information corresponding to a demodulation reference signal DMRS code division multiplexing, CDM, group allocated by the network side device; and/or the terminal determines the TCI state corresponding to the CORESET used when the terminal receives the PDCCH according to at least one TCI state corresponding to the CORESET;

wherein the second determining module is specifically configured to:

25. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 3 or 4 to 11.