WO2020259336A1

WO2020259336A1 - Method, device and system for indicating quasi co-location information

Info

Publication number: WO2020259336A1
Application number: PCT/CN2020/096099
Authority: WO
Inventors: 李南希; 朱剑驰; 郭婧; 佘小明; 陈鹏
Original assignee: 中国电信股份有限公司
Priority date: 2019-06-25
Filing date: 2020-06-15
Publication date: 2020-12-30
Also published as: CN112134662A; CN112134662B

Abstract

The present disclosure relates to the field of wireless communication, and proposed thereby are a method, device and system for indicating quasi co-location information. A terminal receives downlink control information (DCI) sent by a base station, a transmission configuration indicator (TCI) field of the DCI indicating a TCI code point; when the TCI code point indicated by the TCI field comprises two TCI states, according to the mapping between the two TCI states of the TCI code point and CDM groups as well as a first mapping between DMRS ports and the CDM groups, the terminal obtains quasi co-location (QCL) information of DMRS ports of different base stations corresponding to the two TCI states, wherein the two TCI states indicate the QCL information of the DMRS ports of different base stations respectively, and in the first mapping between the DMRS ports and the CDM groups, DMRS ports of different base stations are configured to belong to different CDM groups. Therefore, a quasi co-location information indication scheme suitable for multiple transmission points is achieved.

Description

Quasi co-site information indicating method, equipment and system

Cross references to related applications

This application is based on the application with CN application number 201910553072.1 and the filing date of June 25, 2019, and claims its priority. The disclosure of the CN application is hereby incorporated into this application as a whole.

Technical field

The present disclosure relates to the field of wireless communication, and in particular to a method, equipment and system for indicating quasi co-site information.

Background technique

The signal sent from the antenna port with Quasi Co-Located (QCL) relationship will undergo the same large-scale fading. Large-scale fading includes, for example, delay spread, Doppler spread, Doppler shift, and average Channel gain and average delay, etc.

The inventor found that the QCL information indication solution for a single transmission point (Transmission Reception Point, TRP) is not suitable for QCL information indication in a multi-TRP scenario because of the transmission channels between different transmission points and terminals Generally, there are big differences. Antenna ports of different transmission points generally have different quasi-co-site relationships. Therefore, using the same Transmission Configuration Indication (TCI) status is difficult to accurately reflect the quasi-co-site of antenna ports of different transmission points. Address relationship.

Summary of the invention

The present disclosure proposes a quasi co-site information indication scheme suitable for multiple transmission points. Multi-transmission point technology can improve the spectrum efficiency of cell edge users. The quasi-co-site information indication solution of the present disclosure can be used for multi-transmission point technology, especially for single physical downlink control channel (Physical Downlink Control Channel, PDCCH) multiple transmission points Technology plays a supporting role. The so-called single PDCCH multiple transmission point technology means that multiple transmission points use one PDCCH for QCL indication.

Some embodiments of the present disclosure propose a method for indicating quasi co-site information, including:

The base station sends the downlink control information DCI to the terminal. The transmission configuration of the DCI indicates that the TCI field indicates one TCI code point, so that when the TCI code point indicated by the TCI field contains two TCI states, the terminal is based on the two TCI code points of the TCI code point. The mapping relationship between the state and the code division multiplexing CDM group and the first mapping relationship between the demodulation reference signal DMRS port and the CDM group obtain the quasi co-site QCL information of the DMRS ports of the different base stations corresponding to the two TCI states;

Wherein, the two TCI states respectively indicate QCL information of DMRS ports of different base stations. In the first mapping relationship between DMRS ports and CDM groups, DMRS ports of different base stations are configured to belong to different CDM groups.

In some embodiments, the mapping relationship between the two TCI states of the TCI code point and the code division multiplexing CDM group is:

For the first DMRS type, there are two CDM groups, and the two TCI states of one TCI code point correspond to the two CDM groups respectively;

For the second DMRS type, there are three CDM groups, then one of the two TCI states of a TCI code point corresponds to one of the three CDM groups, and the other TCI state corresponds to the three CDM groups One or two of the other CDM groups.

In some embodiments, each TCI state includes at most two downlink reference signals and corresponding QCL information.

In some embodiments, the base station configures multiple TCI code points for the terminal through radio resource control RRC signaling.

In some embodiments, it further includes: activating the TCI code point through the media access control control element MAC-CE.

In some embodiments, the method further includes: when the TCI code point indicated by the TCI domain includes a TCI state, the terminal obtains the QCL information of the DMRS port of the base station according to the second mapping relationship between the DMRS port and the CDM group.

The terminal receives the downlink control information DCI sent by the base station, and the transmission configuration indication TCI field of the DCI indicates the TCI code point;

When the TCI code point indicated by the TCI field contains two TCI states, the terminal will use the mapping relationship between the two TCI states of the TCI code point and the code division multiplexing CDM group and the first mapping relationship between the demodulation reference signal DMRS port and the CDM group. Obtaining quasi co-site QCL information of DMRS ports of different base stations corresponding to the two TCI states;

In some embodiments, the method further includes: the terminal receives configuration information of multiple TCI code points sent by the base station, and at least part of the TCI code points in the configuration information includes two TCI states.

One of the multiple base stations selects the first mapping relationship between the DMRS port and the code division multiplexing CDM group according to the different demodulation reference signal DMRS ports respectively used by the multiple base stations, and in the first mapping relationship , DMRS ports of different base stations are configured to belong to different CDM groups;

One of the base stations determines a transmission control indication TCI code point, the TCI code point includes a plurality of TCI states, and the plurality of TCI states respectively indicate quasi-co-site QCL information of the DMRS ports of the plurality of base stations;

One of the base stations sends downlink control information DCI to the terminal. The DCI indicates the index information of the TCI code point and the first mapping relationship, so that when the indicated TCI code point contains multiple TCI states, the The mapping relationship between the multiple TCI states of the TCI code points and the CDM group and the first mapping relationship obtain QCL information of the DMRS port of each base station in the multiple base stations.

In some embodiments, the mapping relationship between the multiple TCI states of the TCI code point and the CDM group is: the multiple TCI states of the TCI code point respectively correspond to different CDM groups in the multiple CDM groups.

The terminal receives the downlink control information DCI sent by the base station. The DCI indicates the transmission configuration indicating the TCI code point and index information. When the indicated TCI code point contains multiple TCI states, the multiple TCI states respectively indicate the solutions of multiple base stations. The quasi co-site QCL information of the reference signal DMRS port is adjusted, the multiple base stations respectively correspond to different DMRS ports, and the index information is the index information of the first mapping relationship between the DMRS port and the code division multiplexing CDM group. In the first mapping relationship, the DMRS ports of different base stations are configured to belong to different CDM groups;

The terminal obtains the QCL information of the DMRS port of each base station in the multiple base stations according to the set mapping relationship between the multiple TCI states of the TCI code points and the CDM group and the first mapping relationship.

In some embodiments, the method further includes: the terminal receives configuration information of the TCI code point sent by the base station, at least part of the TCI code points in the configuration information includes multiple TCI states; the terminal determines the TCI code indicated by the DCI according to the configuration information Point contains multiple TCI states.

Some embodiments of the present disclosure propose a base station, including:

Memory; and

A processor coupled to the memory, and the processor is configured to execute the quasi co-site information indicating method in any one of the embodiments based on instructions stored in the memory.

Some embodiments of the present disclosure propose a terminal, including:

Memory; and

Some embodiments of the present disclosure propose a quasi co-site information indicating system, including: a base station; and a terminal.

Some embodiments of the present disclosure propose a non-transitory computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the method for indicating quasi co-site information in any of the embodiments is implemented.

Description of the drawings

The following will briefly introduce the drawings that need to be used in the description of the embodiments or related technologies. According to the following detailed description with reference to the accompanying drawings, the present disclosure can be understood more clearly.

Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

FIG. 1 is a schematic flowchart of some embodiments of the disclosed method for indicating co-site information.

Figure 2 is a schematic structural diagram of some embodiments of the disclosed network equipment.

Figure 3 is a schematic structural diagram of some embodiments of a terminal of the present disclosure.

Figure 4 is a schematic structural diagram of some embodiments of the disclosed quasi co-site information indicating system.

FIG. 5 is a schematic flowchart of other embodiments of the disclosed quasi co-site information indicating method.

Detailed ways

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure.

In the present disclosure, the transmission point may be a base station, for example.

The present disclosure is applicable to the quasi co-site information indication scheme for multiple transmission points (especially multiple transmission points of a single PDCCH). The main improvements involve three aspects, namely TCI, TCI and CDM (Code Division Multiplexing, code division multiplexing) Group mapping, DMRS (Demodulation Reference Signal, demodulation reference signal) port and CDM group mapping. These contents are described separately below.

The TCI status can indicate the downlink reference signal and QCL type information of the corresponding antenna DMRS port, that is, which type of large-scale fading parameter can be obtained from which downlink reference signal, so as to adjust the filter parameters of the corresponding channel estimator. The transmission data in the corresponding channel is received. For multiple antenna ports with a quasi co-site relationship, the channel estimation result obtained from one antenna port can be used for the other antenna ports.

The TCI status contains QCL information, such as QCL type information. The TCI state may include at most two downlink reference signals, for example. The format of TCI status can be expressed as:

TCI status: <downlink reference signal 1|QCL type 1, downlink reference signal 2|QCL type 2>

Among them, QCL types include, for example:

QCL-Type A, {Doppler frequency shift, Doppler spread, average delay, delay spread};

QCL-Type B, {Doppler frequency shift, Doppler extension};

QCL-Type C, {Doppler frequency shift, average delay};

QCL-Type D, {spatial receive (receive, Rx) parameter}.

The number of downlink reference signals is related to the number of independent QCL types. Therefore, if a new QCL type independent of QCL-Type A/B/C/D is added in the future, such as QCL-Type E, at this time, TCI The status may include more than two (such as three) downlink reference signals and corresponding QCL information.

In the transmission of a single PDCCH with multiple transmission points, the TCI field (for example, 3 bits) in the downlink control information (Downlink Control Information, DCI) may indicate the TCI code point. The value of the TCI code point is initially configured by RRC (Radio Resource Control), and then activated by MAC-CE (Media Access Control-Control Elements). The TCI code point may include two or more TCI states, which are respectively used to indicate the QCL information of the antenna DMRS ports of different transmission points. The structure of TCI code points can be expressed as:

TCI code point: <TCI state 1, TCI state 2>

Among them, each TCI state can refer to the foregoing, which will not be repeated here.

DMRS is used for PDSCH (Physical Downlink Shared Channel, physical downlink shared channel) and PDCCH (Physical Downlink Control Channel, physical downlink control channel) related demodulation.

Different DMRS types have different numbers of CDM groups. Among them, DMRS-type 1 (the first DMRS type) has 2 CDM groups, and DMRS-type 2 (the second DMRS type) has 3 CDM groups. Each CDM The group can correspond to 4 antenna DMRS ports one-to-one, and the same CDM group has the same QCL relationship.

For the first DMRS type, there are two CDM groups, and the two TCI states of one TCI code point correspond to the two CDM groups respectively.

In some embodiments, for DMRS-type 2, two TCI states in a TCI code point respectively correspond to a CDM group, and the possible mapping methods include, for example, 3 ways: {TCI state 1 -> CDM 0, TCI state 2 ->CDM 1}, {TCI status 1->CDM 0, TCI status 2->CDM 2}, {TCI status 1->CDM 1, TCI status 2->CDM 2}. When the number of data transmission layers is less than or equal to 4, this mapping method can be used.

In some embodiments, for DMRS-type 2, a certain TCI state in a TCI code point corresponds to two CDM groups, and possible mapping methods include, for example, 3 ways: {TCI state 1 -> CDM 0, TCI state 2- >CDM 1&CDM 2}, {TCI status 1->CDM 1, TCI status 2->CDM 0&CDM 2}, {TCI status 1->CDM 2, TCI status 2->CDM 0&CDM 1}. When the number of layers of data transmission is greater than or equal to 4, this mapping method can be used.

It should be noted that the relationship between the two TCI states in a TCI code point is interchangeable, for example {TCI state 1->CDM 1, TCI state 2->CDM 0}.

The above two mapping methods of DMRS-type 2 can be combined and expressed as the following mapping relationship: {TCI state 1->CDM 0, TCI state 2->other CDM groups}, {TCI state 1->CDM 1, TCI state 2- >Other CDM groups}, {TCI status 1->CDM 2, TCI status 2->Other CDM groups}.

It can be seen that the multiple TCI states of the TCI code point correspond to different CDM groups in the multiple CDM groups respectively.

The mapping relationship between DMRS ports and CDM groups applicable to multiple transmission points (the first mapping relationship, for example, may be a mapping table) should satisfy:

1) In the case of multiple TRPs, the DMRS ports of different TRPs generally do not have the same QCL relationship. Therefore, the DMRS ports of multiple TRPs should belong to different CDM groups. Taking the number of TRPs as an example, the DMRS port and The CDM group mapping relationship must include at least 2 CDM groups;

2) DMRS ports of different TRPs are configured to belong to different CDM groups, that is, different TRPs are configured to belong to DMRS ports of different CMD groups.

The second mapping relationship between the DMRS port of a single transmission point and the CDM group (for example, a mapping table), which includes 1 or 2 CDM groups, which will cause different TRPs when directly used for QCL indications of multiple TRPs At least part of the DMRS ports are configured to belong to the same CDM group, which does not meet the requirements of the mapping relationship between the DMRS port and the CDM group applicable to multiple transmission points. For the second mapping relationship between the DMRS port and the CDM group, for example, refer to Tables 7.3.1.2.2-1 to 7.3.1.2.2-4 of 3GPP TS 38.212.

It should be noted that the DMRS port and the antenna port have a one-to-one correspondence, and the correspondence between the DMRS port and the CDM group is consistent with the correspondence between the antenna port and the CDM group. In order to highlight the key points, the present disclosure takes the correspondence relationship between the DMRS port and the CDM group as an example for description.

The following compares and analyzes the first mapping relationship (see Table 2) and the second mapping relationship (see Table 1) between the DMRS port and the CDM group.

Table 1

Table 2

Suppose: TRP1 transmits layer 3 data (or TRP1 transmits 3 data streams), TRP2 transmits layer 1 data (or TRP2 transmits 1 data stream), and DMRS ports 0, 1, 4, and 5 correspond to CDM 0, DMRS ports 2, 3, 6, 7 correspond to CDM 1.

According to Table 1, it is index 10 that can support Layer 4 transmission, its DMRS port {0,1} belongs to CDM 0, DMRS port {2,3} belongs to CDM 1, TRP1 requires 3 DMRS ports to transmit Layer 3 data, TRP2 The transmission of layer 1 data requires one DMRS port. The DMRS port of TRP2 and a certain DMRS port of TRP1 belong to the same CDM group. Therefore, index 10 cannot meet the data transmission requirements of TRP1 and TRP2.

According to Table 2, it is possible to support 4 layers of transmission, index 11 and index 12. For index 11, its DMRS port {0,1,4} belongs to CDM 0, DMRS port {2} belongs to CDM 1, TRP1 can occupy 3 DMRS ports {0,1,4} to transmit layer 3 data, and TRP2 transmits 1 Layer data can occupy one DMRS port {2}, and the DMRS port of TRP2 and the DMRS port of TRP1 belong to different CDM groups. Therefore, index 11 can meet the data transmission requirements of TRP1 and TRP2.

Similarly, for index 12, its DMRS port {2,3,6} belongs to CDM 1, and DMRS port {4} belongs to CDM 0. TRP1 can occupy 3 DMRS ports {2,3,6} to transmit layer 3 data. TRP2 can occupy 1 DMRS port {4} for transmitting layer 1 data, and the DMRS port of TRP2 and the DMRS port of TRP1 belong to different CDM groups. Therefore, index 12 can also meet the data transmission requirements of TRP1 and TRP2.

FIG. 1 is a schematic flowchart of some embodiments of the disclosed method for indicating co-site information. As shown in Fig. 1, the method of this embodiment includes: steps 11-14a/b.

Step 11: The network device configures multiple TCI code points for the terminal, for example, through RRC signaling, and correspondingly, the terminal receives configuration information of multiple TCI code points sent by the network device.

Among them, each TCI code point may include, for example, two TCI states, respectively indicating QCL information of DMRS ports of different TRPs, or may include one TCI state indicating QCL information of DMRS ports of one TRP.

Among them, the network equipment is, for example, a base station.

Step 12: The network device activates the TCI code point through the MAC-CE. If the TCI field is 3 bits (bits), a maximum of 8 TCI code points are activated.

Step 13: The network device sends DCI to the terminal, and correspondingly, the terminal receives the DCI sent by the network device. The TCI field of DCI indicates one of the TCI code points.

Step 14a: When the TCI code point indicated by the TCI field contains two TCI states, the terminal will use the mapping relationship between the two TCI states of the TCI code point and the code division multiplexing CDM group and the mapping relationship between the DMRS port and the CDM group (first Mapping relationship) to obtain CDM group information and QCL information of the DMRS port. For example, refer to the related example in Table 2 above.

Specifically, according to the mapping relationship between the two TCI states of the TCI code point and the CDM group, the corresponding relationship between the TCI state and the CDM group can be determined. According to the first mapping relationship between the DMRS port and the CDM group, the DMRS port and the CDM group can be determined With the CDM group as the link, the corresponding relationship between each DMRS port and the TCI state can be determined. Since the TCI state contains QCL information, the QCL information of each DMRS port is also determined.

Among them, in the first mapping relationship between DMRS ports and CDM groups, the DMRS ports of different TRPs are configured to belong to different CDM groups, such as the mapping relationship of indexes 11 and 12 listed above, and because multiple TRPs are involved, there are multiple TRPs. CDM groups.

In addition, the network device may send index information of the first mapping relationship to the terminal, so that the terminal obtains the corresponding first mapping relationship through the index information.

Step 14b: When the TCI code point indicated by the TCI field contains a TCI state, the terminal obtains the CDM group information and QCL information of the DMRS port according to the second mapping relationship between the DMRS port and the CDM group. For example, refer to the related example in Table 1 above.

Among them, in the second mapping relationship between the DMRS port and the CDM group, if it is directly used for the QCL indication of multiple TRPs, at least part of the DMRS ports of different TRPs will be configured to belong to the same CDM group, as listed above. Example of mapping relationship of 10.

In addition, the network device may send the index information of the second mapping relationship to the terminal, so that the terminal obtains the corresponding second mapping relationship through the index information.

The foregoing embodiment can support the quasi co-site information indication of multiple transmission points (especially multiple transmission points of a single PDCCH), and in addition, can be compatible with the quasi co-site information indication of a single transmission point.

The foregoing embodiment described the quasi co-site information indication method described as an example where one TCI code point contains two TCI states. The quasi co-site information indication method when a TCI code point contains more than two TCI states is basically the same as the quasi co-site information indication method when a TCI code point contains two TCI states. description.

FIG. 5 is a schematic flowchart of other embodiments of the disclosed quasi co-site information indicating method. As shown in Figure 5, the method of this embodiment includes: 51-54a/b.

Step 51: One of the multiple base stations serving the terminal together selects the first mapping relationship between the DMRS port and the CDM group according to the different DMRS ports used by the multiple base stations. In the first mapping relationship, the DMRS ports are configured to belong to different CDM groups.

Step 52: One of the base stations determines a TCI code point, the TCI code point includes multiple TCI states, and the multiple TCI states respectively indicate the QCL information of the DMRS ports of the multiple base stations.

Among them, the TCI status corresponds to the base station one to one. For example, the TCI code point includes 3 TCI states, and the 3 TCI states respectively indicate the QCL information of the DMRS ports of the 3 base stations.

Step 53: The one of the base stations sends DCI to the terminal, and the DCI indicates the index information of the TCI code point and the first mapping relationship.

Step 54a: The terminal receives the DCI sent by the base station, and when the indicated TCI code point contains multiple TCI states, obtain multiple base stations according to the set mapping relationship between multiple TCI states of the TCI code point and the CDM group and the first mapping relationship QCL information of the DMRS port of each base station in.

The mapping relationship between the multiple TCI states of the TCI code point and the CDM group is: the multiple TCI states of the TCI code point respectively correspond to different CDM groups in the multiple CDM groups.

In addition, before step 52, the base station may also send configuration information of TCI code points to the terminal, and at least part of the TCI code points in the configuration information includes multiple TCI states. Correspondingly, the terminal receives the configuration information of the TCI code point sent by the base station, and determines, according to the configuration information, whether the TCI code point indicated by the DCI contains multiple TCI states. Before step 52, the base station may also activate at least part of the configured TCI code points through MAC-CE. In step 52, one of the base stations may determine a TCI code point from the configured or activated TCI code points.

Step 54b, the terminal receives the DCI sent by the base station, and when the indicated TCI code point includes a TCI state, the terminal obtains the QCL information of the DMRS port according to the second mapping relationship between the DMRS port and the CDM group.

Figure 2 is a schematic structural diagram of some embodiments of the disclosed network equipment. The network device is, for example, a base station.

As shown in FIG. 2, the network device 20 of this embodiment includes: a memory 21; and a processor 22 coupled to the memory. The processor 22 is configured to execute any of the foregoing embodiments based on instructions stored in the memory. Quasi co-site information indication method.

For example, the network equipment configures multiple transmission configuration indication TCI code points for the terminal, each TCI code point contains two TCI states, respectively indicating the quasi co-site QCL information of the DMRS port of the demodulation reference signal DMRS port of the TRP of different transmission points; Send downlink control information DCI to the terminal. The TCI field of the DCI indicates one of the TCI code points, so that when the TCI code point indicated by the TCI field contains two TCI states, the terminal will use the two TCI states and code points of the TCI code point. The mapping relationship between the multiplexing CDM group and the first mapping relationship between the DMRS port and the CDM group obtain the CDM group information and QCL information of the DMRS port; among them, in the first mapping relationship between the DMRS port and the CDM group, DMRS ports of different TRPs It is configured to belong to different CDM groups.

For another example, one of the multiple base stations selects the first mapping relationship between the DMRS port and the code division multiplexing CDM group according to different demodulation reference signal DMRS ports used by the multiple base stations. In the first mapping relationship, The DMRS ports of different base stations are configured to belong to different CDM groups; one base station determines the transmission control indicator TCI code point, the TCI code point contains multiple TCI states, and multiple TCI states indicate the quasi-co-site addresses of the DMRS ports of multiple base stations. QCL information; one of the base stations sends downlink control information DCI to the terminal. The DCI indicates the index information of the TCI code point and the first mapping relationship, so that when the indicated TCI code point contains multiple TCI states, it will be based on the number of TCI code points. A mapping relationship between a TCI state and a CDM group and a first mapping relationship are used to obtain QCL information of the DMRS port of each base station in the multiple base stations.

As shown in FIG. 3, the terminal 30 of this embodiment includes: a memory 31; and a processor 32 coupled to the memory. The processor 32 is configured to execute the standard in any of the foregoing embodiments based on instructions stored in the memory. Co-site information indication method.

For example, the terminal receives the configuration information of multiple transmission configuration instructions TCI code points sent by the network equipment, and each TCI code point contains two TCI states, which respectively indicate the quasi co-site address QCL of the DMRS port of the TRP demodulation reference signal of different transmission points. Information; the terminal receives the downlink control information DCI sent by the network device, and the TCI field of the DCI indicates one of the TCI code points; when the TCI code point indicated by the TCI field contains two TCI states, the terminal according to the two TCI code points of the TCI code point The mapping relationship between the status and the code division multiplexing CDM group and the first mapping relationship between the DMRS port and the CDM group obtain the CDM group information and QCL information of the DMRS port; wherein, in the first mapping relationship between the DMRS port and the CDM group, different TRPs The DMRS ports are configured to belong to different CDM groups.

For another example, the terminal receives the downlink control information DCI sent by the base station. The DCI indicates the transmission configuration indicates the TCI code point and index information. When the indicated TCI code point contains multiple TCI states, the multiple TCI states indicate the demodulation of multiple base stations. With reference to the quasi co-site QCL information of the DMRS port of the reference signal, multiple base stations respectively correspond to different DMRS ports. The index information is the index information of the first mapping relationship between the DMRS port and the code division multiplexing CDM group. In the first mapping relationship, The DMRS ports of different base stations are configured to belong to different CDM groups; the terminal obtains the QCL of the DMRS port of each base station in the multiple base stations according to the mapping relationship between the multiple TCI states of the set TCI code points and the CDM group and the first mapping relationship information.

Among them, the

memories

21 and 31 may include, for example, system memories, fixed non-volatile storage media, and the like. The system memory, for example, stores an operating system, an application program, a boot loader (Boot Loader), and other programs.

Figure 4 is a schematic structural diagram of some embodiments of the disclosed quasi co-site information indicating system. As shown in FIG. 4, the system 40 of this embodiment includes: the aforementioned network device 20 and the aforementioned terminal 30.

Those skilled in the art should understand that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable non-transitory storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. .

The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection of the present disclosure. Within range.

Claims

A quasi co-site information indication method, including:

The base station sends the downlink control information DCI to the terminal. The transmission configuration of the DCI indicates that the TCI field indicates one TCI code point, so that when the TCI code point indicated by the TCI field contains two TCI states, the terminal is based on the two TCI code points of the TCI code point. The mapping relationship between the state and the code division multiplexing CDM group and the first mapping relationship between the demodulation reference signal DMRS port and the CDM group obtain the quasi co-site QCL information of the DMRS ports of the different base stations corresponding to the two TCI states;

Wherein, the two TCI states respectively indicate QCL information of DMRS ports of different base stations. In the first mapping relationship between DMRS ports and CDM groups, DMRS ports of different base stations are configured to belong to different CDM groups.
The method according to claim 1, wherein the mapping relationship between the two TCI states of the TCI code point and the code division multiplexing CDM group is:

For the first DMRS type, there are two CDM groups, and the two TCI states of one TCI code point correspond to the two CDM groups respectively;

For the second DMRS type, there are three CDM groups, then one of the two TCI states of a TCI code point corresponds to one of the three CDM groups, and the other TCI state corresponds to the three CDM groups One or two of the other CDM groups.
The method according to claim 1, wherein each TCI state includes at most two downlink reference signals and corresponding QCL information.
The method according to claim 1, further comprising:

The base station configures multiple TCI code points for the terminal through radio resource control RRC signaling.
The method according to claim 1, further comprising:

The base station activates the TCI code point through the media access control control element MAC-CE.
The method according to claim 1, further comprising:

When the TCI code point indicated by the TCI field includes a TCI state, the terminal obtains the QCL information of the DMRS port of the base station according to the second mapping relationship between the DMRS port and the CDM group.
A quasi co-site information indication method, including:

The terminal receives the downlink control information DCI sent by the base station, and the transmission configuration indication TCI field of the DCI indicates the TCI code point;

When the TCI code point indicated by the TCI field contains two TCI states, the terminal will use the mapping relationship between the two TCI states of the TCI code point and the code division multiplexing CDM group and the first mapping relationship between the demodulation reference signal DMRS port and the CDM group. Obtaining quasi co-site QCL information of DMRS ports of different base stations corresponding to the two TCI states;

Wherein, the two TCI states respectively indicate QCL information of DMRS ports of different base stations. In the first mapping relationship between DMRS ports and CDM groups, DMRS ports of different base stations are configured to belong to different CDM groups.
The method according to claim 7, further comprising:

When the TCI code point indicated by the TCI field includes a TCI state, the terminal obtains the QCL information of the DMRS port of the base station according to the second mapping relationship between the DMRS port and the CDM group.
The method according to claim 7, further comprising:

The terminal receives configuration information of multiple TCI code points sent by the base station, and at least part of the TCI code points in the configuration information includes two TCI states.
A quasi co-site information indication method, including:

One of the multiple base stations selects the first mapping relationship between the DMRS port and the code division multiplexing CDM group according to the different demodulation reference signal DMRS ports respectively used by the multiple base stations, and in the first mapping relationship , DMRS ports of different base stations are configured to belong to different CDM groups;

One of the base stations determines a transmission control indication TCI code point, the TCI code point includes a plurality of TCI states, and the plurality of TCI states respectively indicate quasi co-site QCL information of the DMRS ports of the plurality of base stations;

One of the base stations sends downlink control information DCI to the terminal. The DCI indicates the index information of the TCI code point and the first mapping relationship, so that when the indicated TCI code point contains multiple TCI states, the The mapping relationship between the multiple TCI states of the TCI code points and the CDM group and the first mapping relationship obtain QCL information of the DMRS port of each base station in the multiple base stations.
The method according to claim 10, wherein the mapping relationship between the multiple TCI states of the TCI code point and the CDM group is: the multiple TCI states of the TCI code point respectively correspond to different CDM groups of the multiple CDM groups.
A quasi co-site information indication method, including:

The terminal receives the downlink control information DCI sent by the base station. The DCI indicates the transmission configuration indicating the TCI code point and index information. When the indicated TCI code point contains multiple TCI states, the multiple TCI states respectively indicate the solutions of multiple base stations. The quasi co-site QCL information of the reference signal DMRS port is adjusted, the multiple base stations respectively correspond to different DMRS ports, and the index information is the index information of the first mapping relationship between the DMRS port and the code division multiplexing CDM group. In the first mapping relationship, the DMRS ports of different base stations are configured to belong to different CDM groups;

The terminal obtains the QCL information of the DMRS port of each base station in the multiple base stations according to the set mapping relationship between the multiple TCI states of the TCI code points and the CDM group and the first mapping relationship.
The method according to claim 12, further comprising:

The terminal receives the configuration information of the TCI code point sent by the base station, and at least part of the TCI code point in the configuration information contains multiple TCI states;

The terminal determines according to the configuration information that the TCI code point indicated by the DCI includes multiple TCI states.
A base station, including:

Memory; and

A processor coupled to the memory, and the processor is configured to execute the quasi co-site information indication according to any one of claims 1-6, 10-11 based on instructions stored in the memory method.
A terminal, including:

Memory; and

A processor coupled to the memory, and the processor is configured to execute the instruction quasi co-site information according to any one of claims 7-9, 12-13 based on instructions stored in the memory Methods.
A quasi co-site information indication system, including:

The base station of claim 14; and

The terminal of claim 15.
A non-transitory computer-readable storage medium with a computer program stored thereon, and when the computer program is executed by a processor, the method for indicating the quasi co-site information indication according to any one of claims 1-13 is realized.