WO2021160043A1

WO2021160043A1 - Method and system for selecting reference signal for rlm, medium, and electronic device

Info

Publication number: WO2021160043A1
Application number: PCT/CN2021/075599
Authority: WO
Inventors: 王钰华; 王化磊
Original assignee: 展讯半导体(南京)有限公司
Priority date: 2020-02-14
Filing date: 2021-02-05
Publication date: 2021-08-19
Also published as: CN113271159A; CN113271159B

Abstract

Disclosed are a method and system for selecting a reference signal for RLM, a medium, and an electronic device. The selection method comprises: receiving high-layer signaling, the high-layer signaling comprising a first TCI state which is configured in a unified manner, the first TCI state comprising two QCL relationships, wherein one QCL relationship is QCL type D; and if a reference signal for RLM is not detected in the high-layer signaling, and the QCL type D in the first TCI state for indicating receiving a PDCCH correspondingly is an uplink reference signal or an uplink channel, selecting the reference signal for the RLM according to a preset rule. According to the technical solution of the present invention, when the unified TCI state is used and the reference signal for the RLM is not configured to the high-layer signaling, a UE still can quickly select the reference signal for performing the RLM, thereby measuring parameters such as channel quality.

Description

Selection method, system, medium and electronic equipment of RLM reference signal

This application claims the priority of Chinese patent application 202010093482.5 whose filing date is February 14, 2020. This application quotes the full text of the aforementioned Chinese patent application.

Technical field

The present invention relates to the field of communication technology, and in particular to a method, system, medium and electronic equipment for selecting a reference signal of RLM.

Background technique

High-level signaling configures QCL (quasi co-location) through TCI (transmission configuration indication) status. For example, TCI status can be used to indicate the DMRS (demodulation reference) of reference signals in a reference signal set and PDCCH (physical downlink control channel) Signal) QCL spatial relationship between ports.

There are 4 types of QCL in the prior art, as shown in Table 1.

Table 1

A TCI state can contain one or two QCL type information. If the QCL contains two QCL type information, then there is only one QCL type D information.

In the existing communication standards, the DMRS of the PDCCH has a total of three possible combinations of QCL relationships, for example:

The DMRS and TRS (Tracking Reference Signals) of the PDCCH are quasi-co-located according to QCL type A, and under appropriate conditions (for example, QCL type D exists), and the same TRS resource is quasi-co-located according to QCL type D.

The DMRS and TRS of the PDCCH are quasi co-located according to QCL type A, and if appropriate (for example: QCL type D exists), and beam (beam) management CSI-RS (channel state information reference signal) resources according to QCL type D quasi co-location.

The DMRS of the PDCCH and the CSI-RS resource acquired as CSI (channel state information) are quasi-co-addressed according to QCL type A, and if appropriate (for example: QCL type D exists), and the same CSI-RS resource according to QCL type D quasi co-location.

In the existing protocol, RLM (Radio Link Monitoring) is a process in which the UE (User Equipment) monitors the transmission quality of the radio link according to the RLM reference signal configured by the high-level signaling. Therefore, RLM can be used to help the UE reduce the number of radio link failures, thereby avoiding service interruption. If the high-layer signaling does not configure the RLM reference signal for the terminal, the UE in the prior art uses the reference signal in the TCI of the PDCCH as the RLM reference signal.

In this case, if the TCI state of the PDCCH contains a QCL relationship, the reference signal configured in this QCL can be used as the reference signal of the RLM. If the TCI state of the PDCCH contains two QCL relationships (Note: if a TCI state contains two QCLs, then one of them must be QCL type D, and the other must be non-QCL type D), you can use the QCL type D configuration The reference signal serves as the reference signal of the RLM.

In the existing protocol, since all reference signals configured for QCL type A and reference signals configured for QCL type D are downlink reference signals, the UE can use QCL type D when no RLM reference signal is configured for high-level signaling. The configured reference signal serves as the reference signal of the RLM. However, in a scenario where the PDCCH uses a unified TCI state, the reference signal configured with QCL type D may be an uplink reference signal. In this case, the UE cannot determine which reference signal should be selected to perform RLM.

Summary of the invention

The technical problem to be solved by the present invention is to overcome in the prior art when a unified TCI state is used, the reference signal of RLM is not configured in high-level signaling, and QCL type D is used to configure the uplink reference signal, there will be the UE cannot determine the selection What kind of reference signal is used to implement the defect of RLM, and a method, system, medium and electronic device for selecting the reference signal of RLM are provided.

The present invention solves the above technical problems through the following technical solutions:

A method for selecting a reference signal of RLM, the selecting method includes:

Receiving high-layer signaling, where the high-layer signaling includes a uniformly configured first TCI state, and the first TCI state includes two QCL relationships, one of which is QCL type D;

If the reference signal used for RLM is not detected in the high-level signaling, and it is used to indicate that the QCL type D in the first TCI state of the received PDCCH corresponds to an uplink reference signal or an uplink channel, the selection of the RLM reference signal.

Optionally, the selecting the reference signal of the RLM according to a preset rule includes:

If the other QCL relationship in the first TCI state is QCL type A, then the downlink reference signal corresponding to QCL type A in the first TCI state is selected as the RLM reference signal.

If the uplink reference signal or uplink channel corresponding to the QCL type D includes a second TCI state, and the QCL type D in the second TCI state corresponds to a downlink reference signal, select the QCL in the second TCI state The downlink reference signal corresponding to type D is used as the reference signal of the RLM.

Optionally, the downlink reference signal configured by the QCL type A includes CSI-RS resources used for CSI acquisition or TRS resources used for time-frequency acquisition.

An RLM reference signal selection system, the selection system including a signaling receiving module and a reference signal selection module:

The signaling receiving module is configured to receive high-level signaling, the high-level signaling includes a uniformly configured first TCI state, and the first TCI state includes two QCL relationships, one of which is QCL type D;

The reference signal selection module is used to detect no reference signal used for RLM in the high-level signaling, and is used to indicate that the QCL type D in the first TCI state of the received PDCCH corresponds to an uplink reference signal or an uplink channel, The reference signal of the RLM is selected according to a preset rule.

Optional,

The reference signal selection module is configured to select a downlink reference signal corresponding to QCL type A in the first TCI state as a reference for the RLM when another QCL relationship in the first TCI state is QCL type A Signal.

Optionally, the reference signal selection module, when the uplink reference signal or uplink channel corresponding to the QCL type D includes a second TCI state, and the QCL type D in the second TCI state corresponds to a downlink reference signal, The downlink reference signal corresponding to QCL type D in the second TCI state is selected as the reference signal of the RLM.

An electronic device includes a memory, a processor, and a computer program stored on the memory and capable of running on the processor. The processor implements the steps of the aforementioned method for selecting a reference signal of the RLM when the processor executes the computer program.

A computer-readable storage medium has a computer program stored thereon, and when the computer program is executed by a processor, the steps of the aforementioned method for selecting a reference signal of an RLM are realized.

The positive progress effect of the present invention is that the method for selecting a reference signal for RLM and the system provided by the present invention receive high-level signaling, the high-level signaling includes a uniformly configured first TCI state, and the first TCI state includes two QCL relationships, one of which is QCL type D; if the reference signal used for RLM is not detected in the high-level signaling, and it is used to indicate that the QCL type D in the first TCI state of the received PDCCH corresponds to the uplink reference Signal or uplink channel, the reference signal of the RLM is selected according to a preset rule. Therefore, when a unified TCI state is used and the RLM reference signal is not configured in the high-level signaling, the UE can still quickly select the reference signal for RLM, and then can measure parameters such as channel quality.

Description of the drawings

FIG. 1 is a flowchart of a method for selecting a reference signal of an RLM according to Embodiment 1 of the present invention.

FIG. 2 is a structural block diagram of a system for selecting a reference signal of an RLM according to Embodiment 2 of the present invention.

FIG. 3 is a structural block diagram of an electronic device according to Embodiment 3 of the present invention.

Detailed ways

The present invention will be further described by way of examples below, but the present invention is not limited to the scope of the described examples.

Example 1

This embodiment provides a method for selecting a reference signal of RLM. As shown in FIG. 1, the method for selecting may include the following steps:

Step S11: Receive high-level signaling, where the high-level signaling includes a uniformly configured first TCI state, and the first TCI state includes two QCL relationships, one of which is QCL type D;

In this embodiment, the high-level signaling may be RRC (Radio Resource Control) signaling and MAC CE (Media Access Control Layer Control Unit) signaling.

The RRC signaling may include multiple TCI states, the first TCI state is one TCI state activated by the MAC CE among the multiple TCI states, and the first TCI state is used to indicate the reception of the PDCCH.

Step S12: If the reference signal used for RLM is not detected in the high-level signaling, and it is used to indicate that the QCL type D in the first TCI state of the received PDCCH corresponds to an uplink reference signal or an uplink channel, follow the preset rule Select the reference signal of the RLM.

The QCL type D in the first TCI state corresponds to the uplink reference signal, which may include SRS (Sounding Reference Signal)

Preferably, selecting the reference signal of the RLM according to a preset rule may include:

Wherein, the downlink reference signal configured by the QCL type A includes CSI-RS resources used for CSI acquisition or TRS resources used for time-frequency acquisition.

In this embodiment, QCL type D in TCI is used to obtain beam information, and QCL type A is used to obtain channel parameter information such as Doppler shift, Doppler spread, average delay, and delay spread.

Preferably, selecting the reference signal of the RLM according to a preset rule may further include:

In the method for selecting RLM reference signals provided in this embodiment, when a unified TCI state is used and the RLM reference signal is not configured in high-level signaling, the UE can still quickly select the reference signal for RLM, which can then determine the channel quality, etc. Parameters are measured.

With regard to the method for selecting the reference signal of the RLM provided in this embodiment, the execution body may be a separate chip, a chip module or a UE, or may be a chip or a chip module integrated in the UE.

Example 2

This embodiment provides a RLM reference signal selection system. As shown in FIG. 2, the selection system 1 may include a signaling receiving module 11 and a reference signal selection module 12.

The signaling receiving module 11 is configured to receive high-level signaling, the high-level signaling includes a uniformly configured first TCI state, and the first TCI state includes two QCL relationships, one of which is QCL type D;

The reference signal selection module 12 is used for not detecting a reference signal used for RLM in the high-layer signaling, and for indicating when the QCL type D in the first TCI state of the received PDCCH corresponds to an uplink reference signal or an uplink channel , Selecting the reference signal of the RLM according to a preset rule.

The QCL type D in the first TCI state corresponds to the uplink reference signal, which may be SRS (Sounding Reference Signal)

Preferably, the reference signal selection module 12 may be used to select the downlink reference signal corresponding to QCL type A in the first TCI state when the other QCL relationship in the first TCI state is QCL type A as The reference signal of the RLM.

Wherein, the downlink reference signal configured by the QCL type A may include CSI-RS resources used for CSI acquisition or TRS resources used for time-frequency acquisition.

Preferably, the reference signal selection module 12 may also be used to include the second TCI state in the uplink reference signal or uplink channel corresponding to the QCL type D, and the QCL type D in the second TCI state corresponds to the downlink When the reference signal is used, the downlink reference signal corresponding to the QCL type D in the second TCI state is selected as the reference signal of the RLM.

When the RLM reference signal selection system provided in this embodiment is running, when the unified TCI state is used and the RLM reference signal is not configured in the high-level signaling, the UE can still quickly select the reference signal for RLM, and then can Parameters such as channel quality are measured.

The selection system of the RLM reference signal described in the embodiment may be a separate chip, a chip module or a UE, or a chip or a chip module integrated in the UE. The various modules/units included in the RLM reference signal selection system may be software modules/units, hardware modules/units, or part software modules/units and part hardware modules/units. For example, for various devices and products that are applied to or integrated in a chip, the various modules/units contained therein can be implemented in the form of hardware such as circuits, or at least part of the modules/units can be implemented in the form of software programs. Runs on the integrated processor inside the chip, and the remaining part of the modules/units can be implemented by hardware methods such as circuits; for each device and product applied to or integrated in the chip module, each of the modules/units contained in it can use circuits, etc. It is realized by hardware, different modules/units can be located in the same component (such as chip, circuit module, etc.) or different components of the chip module, or at least part of the modules/units can be realized in the form of a software program, and the software program runs For the processor integrated inside the chip module, the remaining part of the modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the UE, each module/unit contained in it can be implemented by hardware such as circuits Different modules/units can be located in the same component (for example, chip, circuit module, etc.) or different components in the terminal, or at least some of the modules/units can be implemented in the form of a software program, and the software program runs on the UE The internal integrated processor, and the remaining part of the modules/units can be implemented by hardware such as circuits.

Example 3

The present invention also provides an electronic device. As shown in FIG. 3, the electronic device may include a memory, a processor, and a computer program stored in the memory and running on the processor. The processor executes the computer program. The steps of the method for selecting the reference signal of the RLM in the foregoing embodiment 1.

It can be understood that the electronic device shown in FIG. 3 is only an example, and should not bring any limitation to the function and scope of use of the embodiment of the present invention.

As shown in FIG. 3, the electronic device 2 may be in the form of a general-purpose computing device, for example, it may be a server device. The components of the electronic device 2 may include, but are not limited to: the above-mentioned at least one processor 3, the above-mentioned at least one memory 4, and a bus 5 connecting different system components (including the memory 4 and the processor 3).

The bus 5 may include a data bus, an address bus, and a control bus.

The memory 4 may include a volatile memory, such as a random access memory (RAM) 41 and/or a cache memory 42, and may further include a read-only memory (ROM) 43.

The memory 4 may also include a program tool 45 (or utility tool) having a set of (at least one) program module 44. Such program module 44 includes but is not limited to: an operating system, one or more application programs, and other program modules. As well as program data, each of these examples or some combination may include the realization of a network environment.

The processor 3 executes various functional applications and data processing by running the computer program stored in the memory 4, such as the steps of the method for selecting the reference signal of the RLM in the foregoing embodiment 1 of the present invention.

The electronic device 2 may also communicate with one or more external devices 6 (for example, a keyboard, a pointing device, etc.). This communication can be performed through an input/output (I/O) interface 7. Moreover, the electronic device 2 generated by the model can also communicate with one or more networks (for example, a local area network LAN, a wide area network WAN, and/or a public network) through the network adapter 8.

As shown in FIG. 7, the network adapter 8 can communicate with other modules of the electronic device 2 generated by the model through the bus 5. Those skilled in the art should understand that although not shown in the figure, other hardware and/or software modules can be used in conjunction with the electronic device 2 generated by the model, including but not limited to: microcode, device drivers, redundant processors, and external disk drivers. Arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.

It should be noted that, although several units/modules or subunits/modules of the electronic device are mentioned in the above detailed description, this division is only exemplary and not mandatory. In fact, according to the embodiments of the present invention, the features and functions of two or more units/modules described above can be embodied in one unit/module. Conversely, the features and functions of one unit/module described above can be further divided into multiple units/modules to be embodied.

Example 4

This embodiment provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the method for selecting the reference signal of the RLM in the foregoing embodiment 1 are implemented.

Among them, the more specific ways that the computer-readable storage medium can adopt may include, but are not limited to: portable disks, hard disks, random access memories, read-only memories, erasable programmable read-only memories, optical storage devices, magnetic storage devices, or the above Any suitable combination of.

In a possible implementation manner, the present invention can also be implemented in the form of a program product, which includes program code. When the program product runs on a terminal device, the program code is used to make the terminal device execute the implementation of the foregoing embodiment 1. The steps of the selection method of the RLM reference signal.

Among them, the program code for executing the present invention can be written in any combination of one or more programming languages. The program code can be completely executed on the user equipment, partly executed on the user equipment, and used as an independent software. The package is executed, partly on the user's device, partly on the remote device, or entirely on the remote device.

Although the specific embodiments of the present invention are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

A method for selecting a reference signal of RLM, wherein the selecting method includes:

Receiving high-layer signaling, where the high-layer signaling includes a uniformly configured first TCI state, and the first TCI state includes two QCL relationships, one of which is QCL type D;

If the reference signal used for RLM is not detected in the high-level signaling, and it is used to indicate that the QCL type D in the first TCI state of the received PDCCH corresponds to an uplink reference signal or an uplink channel, the selection of the RLM reference signal.
The method for selecting a reference signal of RLM according to claim 1, wherein:

The selecting the reference signal of the RLM according to a preset rule includes:

If the other QCL relationship in the first TCI state is QCL type A, then the downlink reference signal corresponding to QCL type A in the first TCI state is selected as the RLM reference signal.
The method for selecting a reference signal of RLM according to claim 1, wherein:

The selecting the reference signal of the RLM according to a preset rule includes:

If the uplink reference signal or uplink channel corresponding to the QCL type D includes a second TCI state, and the QCL type D in the second TCI state corresponds to a downlink reference signal, select the QCL in the second TCI state The downlink reference signal corresponding to type D is used as the reference signal of the RLM.
The method for selecting a reference signal of RLM according to claim 2, wherein:

The downlink reference signal configured by the QCL type A includes CSI-RS resources used for CSI acquisition or TRS resources used for time-frequency acquisition.
An RLM reference signal selection system, characterized in that the selection system includes a signaling receiving module and a reference signal selection module:

The signaling receiving module is configured to receive high-level signaling, the high-level signaling includes a uniformly configured first TCI state, and the first TCI state includes two QCL relationships, one of which is QCL type D;

The reference signal selection module is used to detect no reference signal used for RLM in the high-level signaling, and is used to indicate that the QCL type D in the first TCI state of the received PDCCH corresponds to an uplink reference signal or an uplink channel, The reference signal of the RLM is selected according to a preset rule.
The RLM reference signal selection system according to claim 5, wherein:

The reference signal selection module is configured to select a downlink reference signal corresponding to QCL type A in the first TCI state as a reference for the RLM when another QCL relationship in the first TCI state is QCL type A Signal.
The RLM reference signal selection system according to claim 5, wherein:

When the uplink reference signal or uplink channel corresponding to the QCL type D includes the second TCI state, and the QCL type D in the second TCI state corresponds to a downlink reference signal, the reference signal selection module selects the first 2. The downlink reference signal corresponding to QCL type D in the TCI state is used as the reference signal of the RLM.
The RLM reference signal selection system according to claim 6, wherein:

The downlink reference signal configured by the QCL type A includes CSI-RS resources used for CSI acquisition or TRS resources used for time-frequency acquisition.
An electronic device comprising a memory, a processor, and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to implement any one of claims 1 to 4 The steps of the selection method of the RLM reference signal.
A computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the method for selecting a reference signal of the RLM according to any one of claims 1 to 4 when the computer program is executed by a processor.