CN113271159A - Method, system, medium and electronic device for selecting reference signal of RLM - Google Patents
Method, system, medium and electronic device for selecting reference signal of RLM Download PDFInfo
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- CN113271159A CN113271159A CN202010093482.5A CN202010093482A CN113271159A CN 113271159 A CN113271159 A CN 113271159A CN 202010093482 A CN202010093482 A CN 202010093482A CN 113271159 A CN113271159 A CN 113271159A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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- H—ELECTRICITY
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- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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Abstract
The invention discloses a method, a system, a medium and an electronic device for selecting reference signals of RLM, wherein the selection method comprises the following steps: receiving high-layer signaling, wherein the high-layer signaling comprises a first TCI state which is configured in a unified manner, the first TCI state comprises two QCL relationships, and one QCL relationship is QCL type D; and if the reference signal for the RLM is not detected in the high-level signaling and the QCL type D in the first TCI state for indicating the received PDCCH is corresponding to the uplink reference signal or the uplink channel, selecting the reference signal for the RLM according to a preset rule. According to the technical scheme of the invention, when a uniform TCI state is adopted and the reference signal of the RLM is not configured in the high-level signaling, the UE can still quickly select the reference signal for RLM, so that parameters such as channel quality and the like can be measured.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a system, a medium, and an electronic device for selecting a reference signal of an RLM.
Background
Higher layer signaling configures QCL (quasi co-located) with TCI (transport configuration indication) status, for example: the TCI state may be used to indicate a QCL spatial relationship between reference signals in one reference signal set and DMRS (demodulation reference signals) ports of a PDCCH (physical downlink control channel).
QCLs in the prior art are of a total of 4 types, as shown in table 1.
TABLE 1
Type information of one or two QCLs may be included in one TCI state, and if the type information of two QCLs is included in a QCL, only information of one QCL type D is included.
In the existing communication standard, DMRSs for PDCCH have a combined possibility of three QCL relationships, for example:
DMRSs and TRSs (tracking reference signals) of the PDCCH are quasi co-located according to QCL type a type and, where appropriate (e.g., QCL type D exists), are quasi co-located with the same TRS resource according to QCL type D type.
DMRSs and TRSs of PDCCHs are quasi co-located according to a QCL type a type and, where appropriate (e.g., QCL type D exists), and CSI-RS (channel state information reference signal) resources managed by beams are quasi co-located according to a QCL type D type.
The DMRS of the PDCCH and the CSI-RS resource which is acquired by CSI (channel state information) are quasi co-located according to the QCL type A type, and under the appropriate condition (for example, the QCL type D exists), the same CSI-RS resource is quasi co-located according to the QCL type D type.
In the existing protocol, RLM (radio link monitoring) is a procedure in which a UE (user equipment) monitors the transmission quality of a radio link according to a reference signal of RLM configured by higher layer signaling. Thus, RLM may be used to help the UE reduce the number of radio link failures, thereby avoiding service interruption. If the higher layer signaling does not configure the reference signal of the RLM for the terminal, the UE in the prior art uses the reference signal in the TCI of the PDCCH as the reference signal of the RLM.
In this case, if one QCL relationship is included in the TCI status of the PDCCH, the reference signal configured in this QCL may be used as the reference signal of the RLM. If two QCL relationships are included in the TCI state of the PDCCH (note: if two QCLs are included in one TCI state, one of them must be QCL type D, and the other must be non-QCL type D), the reference signal configured by QCL type D can be used as the reference signal of the RLM.
In the existing protocol, since all the reference signals configured by QCL type a and the reference signals configured by QCL type D are downlink reference signals, the UE can use the reference signals configured by QCL type D as the reference signals of RLM when no reference signals of RLM are configured in the high-layer signaling. However, in a scenario where a unified TCI state is used for PDCCH, the reference signal configured with QCL type D may be an uplink reference signal, in which case the UE cannot determine which reference signal to select to perform RLM.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method, a system, a medium, and an electronic device for selecting a reference signal of RLM, in order to overcome the defect that in the prior art, when a uniform TCI state is used, a reference signal of RLM is not configured in a high-level signaling, and QCL type D is used for configuring an uplink reference signal, UE cannot determine which reference signal should be selected to execute RLM.
The invention solves the technical problems through the following technical scheme:
a method of selecting a reference signal for RLM, the method comprising:
receiving high-layer signaling, wherein the high-layer signaling comprises a first TCI state which is configured in a unified manner, the first TCI state comprises two QCL relationships, and one QCL relationship is QCL type D;
and if the reference signal for the RLM is not detected in the high-level signaling and the QCL type D in the first TCI state for indicating the received PDCCH is corresponding to the uplink reference signal or the uplink channel, selecting the reference signal for the RLM according to a preset rule.
Optionally, the selecting the reference signal of the RLM according to the preset rule includes:
and if the other QCL relationship in the first TCI state is QCL type A, selecting the downlink reference signal corresponding to QCL type A in the first TCI state as the reference signal of the RLM.
Optionally, the selecting the reference signal of the RLM according to the preset rule includes:
if the uplink reference signal or the 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, selecting the downlink reference signal corresponding to the QCL type D in the second TCI state as the reference signal of the RLM.
Optionally, the downlink reference signal configured by the QCL type a includes a CSI-RS resource for CSI acquisition or a TRS resource for time-frequency acquisition.
A selection system of a reference signal for RLM, the selection system comprising a signaling reception module and a reference signal selection module:
the signaling receiving module is configured to receive a high-level signaling, where the high-level signaling includes a first TCI state configured in a unified manner, the first TCI state includes two QCL relationships, and one of the QCL relationships is a QCL type D;
the reference signal selection module is configured to select a reference signal for the RLM according to a preset rule when the reference signal for the RLM is not detected in the high-level signaling and the QCL type D in the first TCI state for indicating that the received PDCCH corresponds to an uplink reference signal or an uplink channel.
Alternatively to this, the first and second parts may,
the reference signal selection module is configured to select, when another QCL relationship in the first TCI state is QCL type a, a downlink reference signal corresponding to QCL type a in the first TCI state as a reference signal of the RLM.
Optionally, the reference signal selection module selects, when the uplink reference signal or the 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 the downlink reference signal, the downlink reference signal corresponding to the QCL type D in the second TCI state as the reference signal of the RLM.
Optionally, the downlink reference signal configured by the QCL type a includes a CSI-RS resource for CSI acquisition or a TRS resource for time-frequency acquisition.
An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for selecting a reference signal of an RLM as described above when executing the computer program.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the aforementioned steps of the method of selection of reference signals for RLM.
The positive progress effects of the invention are as follows: the selection method and the system for the reference signal of the RLM receive a high-level signaling, wherein the high-level signaling comprises a first TCI state which is configured uniformly, the first TCI state comprises two QCL relations, and one QCL relation is QCL type D; and if the reference signal for the RLM is not detected in the high-level signaling and the QCL type D in the first TCI state for indicating the received PDCCH is corresponding to the uplink reference signal or the uplink channel, selecting the reference signal for the RLM according to a preset rule. Therefore, when the unified TCI state is adopted and the reference signal of the RLM is not configured in the high-level signaling, the UE can still quickly select the reference signal for RLM, and further can measure parameters such as channel quality and the like.
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 block diagram of a reference signal selection system of an RLM according to embodiment 2 of the present invention.
Fig. 3 is a block diagram of an electronic device according to embodiment 3 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
The present embodiment provides a method for selecting a reference signal of an RLM, as shown in fig. 1, the method may include the following steps:
step S11: receiving high-layer signaling, wherein the high-layer signaling comprises a first TCI state which is configured in a unified manner, the first TCI state comprises two QCL relationships, and one QCL relationship is QCL type D;
in this embodiment, the higher layer signaling may be RRC (radio resource control) signaling and MAC CE (medium access control layer control element) signaling.
The RRC signaling may include a plurality of TCI states, and the first TCI state may be one of the plurality of TCI states that is activated by the MAC CE, and the first TCI state may be used to indicate that the PDCCH is received.
Step S12: and if the reference signal for the RLM is not detected in the high-level signaling and the QCL type D in the first TCI state for indicating the received PDCCH is corresponding to the uplink reference signal or the uplink channel, selecting the reference signal for the RLM according to a preset rule.
The QCL type D corresponding to the uplink reference signal in the first TCI state can comprise SRS (sounding reference signal)
Preferably, the selecting the reference signal of the RLM according to a preset rule may include:
and if the other QCL relationship in the first TCI state is QCL type A, selecting the downlink reference signal corresponding to QCL type A in the first TCI state as the reference signal of the RLM.
The downlink reference signal configured by the QCL type a includes CSI-RS resources for CSI acquisition or TRS resources for time-frequency acquisition.
In this embodiment, the QCL type D in the TCI is used to obtain beam information, and the QCL type a is used to obtain channel parameter information such as doppler shift, doppler spread, average delay, delay spread, and the like.
Preferably, the selecting the reference signal of the RLM according to a preset rule may further include:
if the uplink reference signal or the 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, selecting the downlink reference signal corresponding to the QCL type D in the second TCI state as the reference signal of the RLM.
In the method for selecting the reference signal of the RLM provided in this embodiment, when the uniform TCI state is adopted and the reference signal of the RLM is not configured in the high-level signaling, the UE can still quickly select the reference signal for performing the RLM, so as to measure parameters such as channel quality.
Example 2
In this embodiment, a system for selecting a reference signal of an RLM is provided, as shown in fig. 2, the system for selecting 1 may include a signaling receiving module 11 and a reference signal selecting module 12:
the signaling receiving module 11 is configured to receive a high-level signaling, where the high-level signaling includes a first TCI state configured in a unified manner, and the first TCI state includes two QCL relationships, where one QCL relationship is a QCL type D;
the reference signal selection module 12 is configured to select the reference signal for the RLM according to a preset rule when the reference signal for the RLM is not detected in the high layer signaling and the QCL type D in the first TCI state of the received PDCCH is corresponding to an uplink reference signal or an uplink channel.
In this embodiment, the higher layer signaling may be RRC (radio resource control) signaling and MAC CE (medium access control layer control element) signaling.
The RRC signaling may include a plurality of TCI states, and the first TCI state may be one of the plurality of TCI states that is activated by the MAC CE, and the first TCI state may be used to indicate that the PDCCH is received.
QCL type D in the first TCI state corresponds to that the uplink reference signal can be SRS (sounding reference signal)
Preferably, the reference signal selecting module 12 is configured to select, when another QCL relationship in the first TCI state is QCL type a, a downlink reference signal corresponding to QCL type a in the first TCI state as the reference signal of the RLM.
The downlink reference signal configured by the QCL type a may include a CSI-RS resource for CSI acquisition or a TRS resource for time-frequency acquisition.
In this embodiment, the QCL type D in the TCI is used to obtain beam information, and the QCL type a is used to obtain channel parameter information such as doppler shift, doppler spread, average delay, delay spread, and the like.
Preferably, the reference signal selecting module 12 may be further configured to select, when the uplink reference signal or the 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 the QCL type D in the second TCI state as the reference signal of the RLM.
When the selection system for the reference signal of the RLM provided in this embodiment is in operation, when a uniform TCI state is adopted and the reference signal of the RLM is not configured in the high-level signaling, the UE can still quickly select the reference signal for performing the RLM, so that parameters such as channel quality can be measured.
Example 3
The present invention also provides an electronic device, as shown in fig. 3, which may include a memory, a processor and a computer program stored on the memory and executable on the processor, and the processor executes the computer program to implement the steps of the method for selecting the reference signal of the RLM in embodiment 1.
It should be understood that the electronic device shown in fig. 3 is only an example, and should not bring any limitation to the function and the scope of the application of the embodiment of the present invention.
As shown in fig. 3, the electronic device 2 may be embodied in the form of a general purpose computing device, such as: which may be a server device. The components of the electronic device 2 may include, but are not limited to: the at least one processor 3, the at least one memory 4, and a bus 5 connecting the various 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 volatile memory, such as Random Access Memory (RAM)41 and/or cache memory 42, and may further include Read Only Memory (ROM) 43.
The memory 4 may also include a program tool 45 (or utility tool) having a set (at least one) of program modules 44, such program modules 44 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The processor 3 executes various functional applications and data processing, such as the steps of the reference signal selection method of the RLM in the foregoing embodiment 1 of the present invention, by running the computer program stored in the memory 4.
The electronic device 2 may also communicate with one or more external devices 6, such as a keyboard, pointing device, etc. Such communication may be via an input/output (I/O) interface 7. Furthermore, the model-generating electronic device 2 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network) via the network adapter 8.
As shown in FIG. 3, the network adapter 8 may communicate with other modules of the model-generated electronic device 2 via a bus 5. It will be appreciated by those skilled in the art that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the model-generated electronic device 2, including but not limited to: microcode, device drives, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, to name a few.
It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module, according to embodiments of the invention. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
Example 4
The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the steps of the method for selecting a reference signal of an RLM in the foregoing embodiment 1.
More specific ways in which the computer-readable storage medium may be employed may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.
In a possible implementation, the present invention can also be implemented in the form of a program product, which includes program code for causing a terminal device to perform the steps of implementing the method for selecting a reference signal for RLM in the foregoing embodiment 1 when the program product is run on the terminal device.
Where program code for carrying out the invention is written in any combination of one or more programming languages, the program code may execute entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device and partly on a remote device or entirely on the remote device.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of illustration only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. A method for selecting a reference signal of an RLM, the method comprising:
receiving high-layer signaling, wherein the high-layer signaling comprises a first TCI state which is configured in a unified manner, the first TCI state comprises two QCL relationships, and one QCL relationship is QCL type D;
and if the reference signal for the RLM is not detected in the high-level signaling and the QCL type D in the first TCI state for indicating the received PDCCH is corresponding to the uplink reference signal or the uplink channel, selecting the reference signal for the RLM according to a preset rule.
2. The method for selecting reference signals of an RLM of claim 1,
the selecting the reference signal of the RLM according to the preset rule includes:
and if the other QCL relationship in the first TCI state is QCL type A, selecting the downlink reference signal corresponding to QCL type A in the first TCI state as the reference signal of the RLM.
3. The method for selecting reference signals of an RLM of claim 1,
the selecting the reference signal of the RLM according to the preset rule includes:
if the uplink reference signal or the 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, selecting the downlink reference signal corresponding to the QCL type D in the second TCI state as the reference signal of the RLM.
4. The method for selecting reference signals of an RLM of claim 2,
the downlink reference signal configured by the QCL type A comprises CSI-RS resources used for CSI acquisition or TRS resources used for time-frequency acquisition.
5. A selection system of reference signals of RLM is characterized in that the selection system comprises a signaling receiving module and a reference signal selection module:
the signaling receiving module is configured to receive a high-level signaling, where the high-level signaling includes a first TCI state configured in a unified manner, the first TCI state includes two QCL relationships, and one of the QCL relationships is a QCL type D;
the reference signal selection module is configured to select a reference signal for the RLM according to a preset rule when the reference signal for the RLM is not detected in the high-level signaling and the QCL type D in the first TCI state for indicating that the received PDCCH corresponds to an uplink reference signal or an uplink channel.
6. The selection system of reference signals of an RLM of claim 5,
the reference signal selection module is configured to select, when another QCL relationship in the first TCI state is QCL type a, a downlink reference signal corresponding to QCL type a in the first TCI state as a reference signal of the RLM.
7. The selection system of reference signals of an RLM of claim 5,
the reference signal selection module selects a downlink reference signal corresponding to the QCL type D in the second TCI state as the reference signal of the RLM when the uplink reference signal or the 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 the downlink reference signal.
8. The selection system of reference signals of an RLM of claim 6,
the downlink reference signal configured by the QCL type A comprises CSI-RS resources used for CSI acquisition or TRS resources used for time-frequency acquisition.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the computer program, carries out the steps of the method for reference signal selection for an RLM according to any of claims 1-4.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for selection of a reference signal for an RLM according to any of the claims 1-4.
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| CN202010093482.5A CN113271159B (en) | 2020-02-14 | 2020-02-14 | Method, system, medium and electronic device for selecting reference signal of RLM |
| PCT/CN2021/075599 WO2021160043A1 (en) | 2020-02-14 | 2021-02-05 | Method and system for selecting reference signal for rlm, medium, and electronic device |
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| WO2019097478A1 (en) * | 2017-11-16 | 2019-05-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Configuring spatial qcl reference in a tci state |
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| EP3553969A1 (en) * | 2018-04-13 | 2019-10-16 | Nokia Technologies Oy | Configuration of failure detection reference signals |
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| CN110149187B (en) * | 2018-02-13 | 2021-08-10 | 展讯通信（上海）有限公司 | Method for acquiring aperiodic channel sounding reference signal |
| WO2019197044A1 (en) * | 2018-04-13 | 2019-10-17 | Nokia Technologies Oy | Channel state information reciprocity support for beam based operation |
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| WO2019097478A1 (en) * | 2017-11-16 | 2019-05-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Configuring spatial qcl reference in a tci state |
| EP3553969A1 (en) * | 2018-04-13 | 2019-10-16 | Nokia Technologies Oy | Configuration of failure detection reference signals |
| US20190281587A1 (en) * | 2018-05-10 | 2019-09-12 | Yushu Zhang | User equipment (ue) downlink transmission configuration indication (tci)-state selection |
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