CN114765496A - Method performed by user equipment and user equipment - Google Patents

Abstract

The invention provides a method executed by User Equipment (UE), which comprises the following steps: receiving an indication signal for indicating a channel state information reference signal, CSI-RS, resource or a set of resources; and determining, according to the received indication signal, a CSI-RS resource or a resource set that satisfies a quasi co-located QCL relationship with a reference signal used by the indication signal.

Description

Method performed by user equipment and user equipment

technical field

The present invention relates to the technical field of wireless communication, and in particular, to a method performed by a user equipment and a corresponding user equipment.

Background technique

User experience is one of the key factors for the success of 5G/NR, not only the data rate and delay experienced by users, but also the terminal power saving is also an important aspect. Enhanced technical solutions for terminal power saving are one of the elements of 5G/NR success. Although some existing technologies have been used for terminal power saving, additional enhanced evolution technology is still one of the key technologies in future development, such as power saving technology for idle or inactive terminals to help terminals In the corresponding state, the device further reduces power consumption or improves the ability to receive signals, or obtains other benefits on the premise of ensuring the communication capability.

SUMMARY OF THE INVENTION

In order to solve at least part of the above problems, the present invention provides a method performed by a user equipment and the user equipment, which can enable the terminal to further obtain accurate measurements, more sleep time and better signals through the reception of reference signals Receiving ability, etc., so that the terminal can obtain benefits such as reduced power consumption, improved receiving ability, and improved user experience, thereby improving the service capability of the network, expanding the compatibility of the network, and greatly reducing the cost of communication network deployment.

According to the present invention, a method performed by a user equipment UE is proposed, comprising: receiving an indication signal for indicating a channel state information reference signal CSI-RS resource or resource set; The reference signal used by the indication signal is a CSI-RS resource or resource set that satisfies the quasi-co-located QCL relationship.

Preferably, according to the indication signal, it is determined that a part or all of the CSI-RS resources or resource sets indicated in the indication signal use the same QCL reference signal as the indication signal.

Preferably, according to the indication signal, the QCL reference signal used by the CSI-RS resource or resource set that meets the time requirement is determined.

Furthermore, according to the present invention, a method performed by a user equipment UE is proposed, comprising: receiving a configuration parameter and indication information used by a channel state information reference signal CSI-RS resource or resource set; and according to the received configuration parameter and the indication information to determine a quasi-co-located QCL reference signal used by the CSI-RS resource or resource set.

Preferably, the configuration parameter is a transmission configuration indication state TCI-state configuration parameter, the indication information indicates a reference signal used by the TCI-state, and it is determined to use the TCI according to the TCI-state configuration parameter and the indication information - QCL reference signal used by the CSI-RS resource or resource set of the state configuration parameter.

Preferably, different QCL reference signals used by the CSI-RS resource or resource set are determined according to different TCI-state configuration parameters.

Preferably, according to the configuration parameter, the QCL reference signal used by the CSI-RS resource or resource set that meets the time requirement is determined.

In addition, according to the present invention, there is proposed a method performed by a user equipment UE, comprising: in the case of not receiving an indication signal for determining a QCL reference signal used for a channel state information reference signal CSI-RS resource or resource set , detect the configured CSI-RS signal; and when the strength of the detected CSI-RS signal exceeds a predetermined threshold, or the detected CSI-RS signal and the reference signal satisfy the quasi-co-located QCL relationship, confirm that the Availability of the CSI-RS signal in the transmission period of the CSI-RS signal, and the QCL reference signal used by the CSI-RS signal.

Preferably, the temporal validity of the CSI-RS signal is determined according to the detected position of the CSI-RS signal.

Furthermore, according to the present invention, a user equipment is proposed, comprising: a processor; and a memory storing instructions, wherein the instructions execute the above-mentioned method when executed by the processor.

According to the present invention, the terminal can further obtain accurate measurement, more sleep time and better signal receiving ability through the receiving of the reference signal, thereby reducing the power consumption of the terminal and improving the receiving ability, thereby improving the The business capability of the network and the expansion of the compatibility of the network greatly reduce the cost of communication network deployment.

Description of drawings

The above and other features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a flowchart illustrating a method performed by a user equipment according to Embodiment 1 of the present invention.

FIG. 2 is a flowchart illustrating a method performed by a user equipment according to Embodiment 2 of the present invention.

FIG. 3 is a flowchart illustrating a method performed by a user equipment according to Embodiment 3 of the present invention.

FIG. 4 is a block diagram schematically illustrating a user equipment involved in the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below, which are provided by way of example only to convey the scope of the subject matter to those skilled in the art. In addition, for the sake of brevity, detailed descriptions of well-known technologies not directly related to the present invention are omitted in order to avoid obscuring the understanding of the present invention.

Generally, unless a different meaning is clearly given and/or implied from the context in which the term is used, all terms used herein are to be interpreted according to their ordinary meaning in the relevant technical field. Unless expressly stated otherwise, all references to an/an/the element, device, component, component, step, etc. should be publicly construed as referring to at least one instance of that element, device, component, component, step, etc. The steps of any method disclosed herein do not have to be performed in the exact order disclosed unless a step must be explicitly described as following or before another step and/or implicitly a step must be after or before another step . Where appropriate, any feature of any embodiment disclosed herein may be applied to any other embodiment. Likewise, any advantage of any embodiment may apply to any other embodiment, and vice versa.

Hereinafter, the 5G/NR mobile communication system and its subsequent evolution versions are used as an example application environment to specifically describe various embodiments according to the present invention. However, it should be pointed out that the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as communication systems after 5G, 4G mobile communication systems before 5G, 802.11 wireless networks, and the like.

Part of the terms involved in the present invention are described below. Unless otherwise specified, the terms involved in the present invention are defined here. The terms given in the present invention may adopt different naming methods in LTE, LTE-Advanced, LTE-Advanced Pro, NR and later or other communication systems, but unified terms are adopted in the present invention, and when applied to specific systems can be replaced with terms used in the corresponding system.

3GPP: 3rd Generation Partnership Project

LTE: Long Term Evolution, long term evolution technology

NR: New Radio, New Radio, New Radio

UE: User Equipment, user equipment

eNB: evolved NodeB, evolved base station

gNB: NR base station

TTI: Transmission Time Interval, transmission time interval

OFDM: Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing

CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing with Cyclic Prefix

C-RNTI: Cell Radio Network Temporary Identifier, cell radio network temporary identifier

CSI: Channel State Information, channel state information

HARQ: Hybrid Automatic Repeat Request, hybrid automatic repeat request

CSI-RS: Channel State Information Reference Signal, channel state information reference signal

CRS: Cell Reference Signal, cell-specific reference signal

PBCH: Physical broadcast channel, physical broadcast channel

PUCCH: Physical Uplink Control Channel, physical uplink control channel

PUSCH: Physical Uplink Shared Channel, physical uplink shared channel

PRACH: Physical random-access channel, physical random access channel

PDSCH: Physical downlink shared channel, physical downlink shared channel

PDCCH: Physical downlink control channel, physical downlink control channel

UL-SCH: Uplink Shared Channel, uplink shared channel

DL-SCH: Downlink Shared Channel, uplink shared channel

RACH: random-access channel, random access channel

DCI: Downlink Control Information, downlink control information

CG: Configured Grant, configure scheduling permission

MCS: Modulation and Coding Scheme, modulation and coding scheme

RB: Resource Block, resource block

RE: Resource Element, resource unit

CRB: Common Resource Block, Common Resource Block

CP: Cyclic Prefix, cyclic prefix

PRB: Physical Resource Block, physical resource block

VRB: Virtual resource block, virtual resource block

FDM: Frequency Division Multiplexing, Frequency Division Multiplexing

TDD: Time Division Duplexing

FDD: Frequency Division Duplexing, Frequency Division Duplexing

RRC: Radio Resource Control, Radio Resource Control

RSRP: Reference Signal Receiving Power, reference signal receiving power

SRS: Sounding Reference Signal, sounding reference signal

DMRS: Demodulation Reference Signal, demodulation reference signal

CRC: Cyclic Redundancy Check, Cyclic Redundancy Check

SFI: Slot Format Indication, slot format indication

SIB: system information block, system information block

SIB1: System Information Block Type 1, system information block type 1

PSS: Primary Synchronization Signal, the main synchronization signal

SSS: Secondary Synchronization Signal, secondary synchronization signal

SSB: Synchronization Signal Block, Synchronization System Information Block

CRB: Common resource block, common resource block

BWP: BandWidth Part, Bandwidth Fragment/Part

SFN: System Frame Number, system (wireless) frame number

PCI: Physical Cell ID, physical cell identification

IE: Information Element, information element

EN-DC: EUTRA-NR Dual Connection, LTE-NR Dual Connection

MCG: Master Cell Group

SCG: Secondary Cell Group, secondary cell group

PCell: Primary Cell, primary cell

SCell: Secondary Cell, secondary cell

SPS: Semi-Persistant Scheduling, semi-static scheduling

TA: Timing Advance, uplink timing advance

PT-RS: Phase-Tracking Reference Signals

TB: Transport Block, Transport Block

TBS: Transport Block Size, transport block size

CB: Code Block, Code Block/Code Block

QPSK: Quadrature Phase Shift Keying, Quadrature Phase Shift Keying

16/64/256QAM: 16/64/256Quadrature Amplitude Modulation, Quadrature Amplitude Modulation

AGC: Auto Gain Control, automatic gain control

TDRA(field): Time Domain Resource Assignment, Time Domain Resource Assignment Indication (field)

FDRA(field): Frequency Domain Resource Assignment, frequency domain resource allocation indication (field)

ARFCN: Absolute Radio Frequency Channel Number, absolute radio frequency channel number

RedCap Device: Reduced Capability Device

CORESET: Control resource set, control resource set

CORESET0: Control resource set 0, control resource set serial number 0

CCE: Control channel element, control channel element

REG: Resource Element Group, resource unit group

MIB: Master Information Block, master information block

DRX: Discontinuous Reception, discontinuous reception

AL: Aggregation Level, aggregation level

UCI: Uplink Control Information, uplink control information

CSS: Common search space, common search space

USS: UE-specific search space, user search space

SCS: sub-carrier spacing, sub-carrier spacing

SLIV: Start and length indicator value, start and length indicator value

RIV: Resource indicator value, resource indicator value

SS-RSRP: Synchronization Signal Reference Signal Received Power, synchronization reference signal received power

SS-RSRQ: Synchronization Signal Reference Signal Received Quality, synchronization reference signal received quality

FR1: Frequency range 1as defined in TS 38.104, frequency range 1 defined by TS 38.104

FR2: Frequency range 2as defined in TS 38.104, frequency range 2 defined by TS 38.104

TCI: Transmission Configuration Indicator, transmission configuration indicator

QCL: Quasi co-location, quasi co-location

The following is a description of the prior art associated with the aspects of the present invention. Unless otherwise specified, the meanings of the same terms in the specific embodiments are the same as those in the prior art.

It is worth noting that the user equipment and terminal equipment involved in the specification of the present invention have the same meaning, and the UE in the text may also represent a terminal, which will not be specifically distinguished and limited in the following. Similarly, a network device is a device that communicates with a terminal, including but not limited to base station devices, gNBs, eNBs, wireless APs, etc., which are not specifically distinguished and limited in the following.

According to different conditions such as connection with the network, the terminal in the network can be divided into three states, a connected state, an idle state and an inactive state. A user in the connected state establishes a wireless connection with the network for data transmission or related business processing. Users in the idle state and inactive state also maintain a certain connection with the network, for example, they need to monitor broadcast messages and paging messages sent by the network, or perform related measurements. If a terminal in an idle or inactive state has no signal to receive or transmit, the terminal can be in a sleep state to save power consumption. According to different channel conditions or services to be processed, etc., the terminal can also be in different sleep modes, such as light sleep mode, which is used for short sleep when there is a new signal to be processed in a short period of time. Another example is the deep sleep mode, which can further reduce the power consumption of the terminal than the light sleep mode when there is no new signal to be processed by the terminal for a long time. Generally, under the condition that the service function is not affected, making the terminal more in the sleep mode can effectively reduce the power consumption of the terminal, thereby improving the user experience. The processing of idle state and inactive state users is similar in many aspects. In order to avoid redundancy, unless otherwise specified, in the relevant text of the present invention, the relevant actions for the terminal or network in the idle state can also be applied to the inactive state. terminal. Similarly, other terminal states that have similar requirements to the idle state can also be handled analogously, and will not be described in detail.

When or before a terminal receives a data signal, some preprocessing is often required. For example, the terminal can adjust the parameters of automatic gain control (AGC), so that the processed data is within its proper dynamic range, so as to obtain a better processing effect. Alternatively, the terminal needs to perform time-frequency tracking, estimate the time offset or frequency offset parameter of the signal according to the reference signal, etc., and make corresponding corrections to the signal or data to be processed to obtain better reception performance. The terminal may also have some other processing to optimize data processing, improve user experience, etc., which will not be described one by one here. The terminal may use the reference signal sent by the network for preprocessing.

The network configures and sends a reference signal to the terminal for channel measurement, channel parameter estimation, mobility assessment, spatial parameter estimation, etc. of the terminal, and realizes functions such as radio resource management and auxiliary data signal reception. For example, the terminal may receive the synchronization reference signal sent by the network to perform AGC adjustment or time-frequency parameter estimation. Alternatively, the terminal may receive the CSI-RS signal sent by the network to perform channel measurement or beam management.

The network configures and sends CSI-RS reference signals for the terminal to perform channel measurement, beam management and other functions. The CSI-RS may be configured to the UE in the form of CSI-RS resources, and a terminal may be configured with one or more CSI-RS resources. One or more CSI-RSs can also form a CSI-RS resource set, and one terminal can be configured with one or more resource sets. One CSI-RS signal is defined in each CSI-RS resource, which may include multiple configuration parameters, such as one or more of time-frequency resource configuration, power configuration, code division configuration, and QCL configuration. The terminal can determine and receive the CSI-RS signal according to the configured parameters, and use it for functions such as measurement or signal reception.

According to some configuration parameters, the CSI-RS can be divided into various types, for example, the NZP-CSI-RS is a CSI-RS with non-zero power, that is, the transmission power of the CSI-RS is not zero. According to different configuration periods, CSI-RS can also be classified into periodic, semi-permanent and aperiodic signal types. Periodic CSI-RS, that is, after the configuration takes effect, the associated CSI-RS resources appear repeatedly on the time-frequency resources at a certain period. Semi-permanent and aperiodic CSI-RS resources need to be activated by means of MAC-CE or DCI indication. The terminal can implement different functions according to different CSI-RS resources and related report indications. The CSI-RS signal used for time-frequency tracking (Tracking) may also be called TRS. In the present invention, CSI-RS is uniformly used as a proxy for CSI-RS of different types or parameters applicable to the present invention.

The network sends SSB signals at a certain period, and the SSB contains various reference signals, such as SSS and PSS. The network can use beams or spatial filters to transmit and receive signals. The beams used in the network may be analog beams or digital beams or a mixture of the two. The network uses corresponding beams to send SSBs. For example, the network uses 8 beams to send SSBs. The SSBs in the sending period can be numbered as SSB0 to SSB7, which respectively represent SSBs sent using different beams. The terminal can select the best beam for signal reception or transmission according to different positions, so as to achieve better communication. The network can also use different beams and terminals to send and receive signals to achieve good communication effects.

In NR, the QCL parameter is used to characterize the spatial relationship between different signals, that is to say, two signals that satisfy the QCL relationship have a certain spatial channel correlation. For example, if the terminal configures two signals to satisfy a certain QCL type relationship, the terminal can use the same certain parameter when processing the two signals, or the parameters obtained from one signal can be applied to the reception or transmission of the other signal. For example, if the QCL type is QCL-typeA, parameters such as Doppler shift, Doppler spread, average delay, and delay spread obtained from one signal can be applied to another signal, or they can be shared. Another example is that the QCL type is QCL-typeC, and a signal can be obtained by a signal Doppler frequency shift, delay spread parameters and other parameters. For another example, the QCL type is QCL-typeD, and one signal beam parameter information can be obtained from one signal. There are several other QCL types, and users can identify them according to relevant parameters during application. The user can also apply related parameters between more signals that satisfy the QCL relationship with each other, and the specific types will not be described one by one. The configuration of the QCL information for a signal can be indicated using the TCI-state parameter group. The TCI-state may contain the type of QCL, another or more signals that satisfy the QCL relationship, and parameters such as cell or BWP information where the signal is located. TCI-state can use TCI-stateID as an identifier. Specifically, the QCL applied to the SSB, that is, if a certain signal and a certain SSB beam satisfy the QCL relationship, then some parameters of the signal and the SSB can be mutually identified.

The CSI-RS signal sent by the network can be sent by using a beam, and the network configures the TCI-state parameter of the CSI-RS to indicate the signal of its QCL. For example, the network may configure a CSI-RS resource that satisfies the QCL with a certain SSB i, and the terminal may consider that the SSB i and some channel parameters of the CSI-RS are the same. If there are other signals on the terminal side that satisfy the QCL with SSB i, the terminal can obtain relevant parameters through the reception or measurement of the CSI-RS, and apply them to the reception of the signal.

Users in the network need to detect the paging information sent by the network according to certain rules. The network configures parameters such as paging cycle and paging frame for the user, and the user receives the PDCCH indicating paging information on a certain time-frequency resource according to the configuration parameters. The terminal may also perform corresponding signal reception or processing according to the indication information in the PDCCH, for example, perform PDSCH reception on the time-frequency resource indicated by the PDCCH. Since the base station cannot determine which is the best receiving beam for the user to be paged, the base station uses all the actually sent SSB beams to send the paging PDCCH to the user within a paging cycle, and the user can receive relevant information according to its own situation the PDCCH information. For example, the terminal may determine the PDCCH time-frequency resource corresponding to a certain SSB beam in the paging period according to the position and sequence of the PDCCH time-frequency resource. Similarly, when receiving a certain paging PDCCH, the terminal can also determine the sequence number of the SSB beam that satisfies the QCL relationship. Other signals in the network may also have a situation similar to paging PDCCH. The terminal can determine the QCL relationship between the signal and the SSB beam according to the explicit or implicit indication. The method applied to the paging PDCCH in the present invention can also be applied to the signal.

A terminal in an idle state or an inactive state needs to periodically receive broadcast or paging information from the network, or perform related measurements. For example, before receiving the paging information, the terminal can receive the reference signal sent by the network according to its own capabilities, channel conditions and other factors, perform AGC, time-frequency tracking and other processing, and receive the corresponding data signal, so as to obtain good results. Due to various internal or external factors, the terminal needs to wake up from the sleep mode in different times or durations when performing these preprocessing. For example, when the channel conditions are poor, the receiving quality of the related reference signals is poor, or when the processing capability of the terminal is limited, the terminal needs to wake up multiple times to receive multiple reference signals to achieve better reception effects. For another example, if the configured reference signal is far from the signal to be received, the terminal may also need to receive the reference signal more times or maintain a longer active time to obtain a better reception effect.

A terminal in an idle state or an inactive state can use the SSB to implement related AGC or time-frequency parameter estimation. The period and time-frequency position of SSB are often fixed, which may not meet the requirements of users to receive signals and reduce power consumption. Therefore, the network can provide additional reference signals for the terminal to receive, so that the terminal can obtain the required parameters faster. or information, thereby reducing the time or number of wakeups for better energy savings. The network may configure the CSI-RS signal to be used as a reference signal for idle or inactive users. For example, the network configures a set of non-zero-power CSI-RS signals in the SIB information, which are used as reference signals for idle or inactive users. In order to save the power consumption of the network, the network can use the CSI-RS signal sent to the connected state user to be shared with the idle state user. The network may configure one or more CSI-RS resources for users in idle state, and some or all of the resources may also be used as signals for users in connected state at the same time. If the connected users no longer use these resources, the network can partially or completely turn off these CSI-RS signals according to different situations, so as to reduce the power consumption on the network side. Whether or not to transmit these CSI-RS signals depends on the implementation of the network. In the process of sending CSI-RS resources, the network may use different beams to send CSI-RS resources according to the adjustment of connected users or other reasons. At this time, it is necessary to notify idle users to adjust or configure beam parameters, so that The idle state user can receive the signal correctly. It is also possible that the network does not notify the idle state user, and the user can confirm the validity of the CSI-RS in time according to the detection result.

The idle state terminal receives the configuration of the network, and determines one or more CSI-RS resources or resource sets and reference signals used by them. Optionally, the network configures one or more QCL reference signals of the CSI-RS resource, and the terminal determines, according to an indication of the network, a reference signal that satisfies the QCL relationship with the CSI-RS resource or resource set. Optionally, the terminal determines the CSI-RS resource or resource set that satisfies the QCL relationship with the reference signal according to the indication of the network. Optionally, the terminal determines the valid time of the CSI-RS resource or resource set according to the indication of the network.

On the other hand, if the network does not send a corresponding indication, or the terminal does not receive an indication to determine the QCL reference signal used by the configured CSI-RS, the terminal can perform detection based on the configured CSI-RS. Condition, such as the detected signal strength exceeds a predetermined threshold, or the detected signal meets a QCL relationship with a certain SSB beam, the terminal can determine the availability of the signal during the transmission period of the signal, and the QCL reference signal used by the signal.

[Example 1]

FIG. 1 is a flowchart illustrating a method performed by a user equipment according to Embodiment 1 of the present invention.

As shown in FIG. 1, in step 101, an indication signal for indicating a CSI-RS resource or resource set is received.

Then, in step 103, the terminal determines, according to the received indication signal, a CSI-RS resource or resource set that satisfies the QCL relationship with the reference signal used by the indication signal.

Optionally, the terminal determines that the CSI-RS resource or resource set indicated in the indication signal and the indication signal use the same QCL reference signal. Optionally, the terminal receives the resource ID or resource set ID of the CSI-RS in the indication signal, the terminal determines the indicated CSI-RS, and the terminal determines that the CSI-RS uses the same QCL reference signal as the indication signal. In a specific example, the indication signal is the paging PDCCH, the terminal receives the paging PDCCH, and instructs the terminal to use the CSI-RS resource or resource set whose ID is i. The terminal can determine that the QCL reference signal used by the PDCCH is SSB j according to the parameters of the PDCCH, and the terminal can determine that the CSI-RS resource or the CSI-RS of resource set i and SSB j satisfy the QCL relationship.

Optionally, when using search space 0 to transmit the indication signal, one SSB beam may correspond to the time-frequency position of the indication signal on two adjacent time slots, and two different SSB beams may correspond to the same time-frequency position of the indication signal. . The terminal may determine the beams with which the QCL relationship is satisfied according to the indication of the indication signal. For example, the indication signal is the paging PDCCH, and the terminal may determine which SSB beam is used by the received PDCCH according to the indication in the PDCCH, that is, the reference signal for determining that the PDCCH satisfies the QCL relationship. Exemplarily, 1 bit is used to identify the SSB beam sequence number corresponding to the PDCCH. For example, 0 is used to indicate that the PDCCH and the first SSB beam that meets the configuration parameter requirements satisfy the QCL relationship, and 1 is used to indicate that the PDCCH and the second SSB beam that meets the configuration parameter requirements meet the QCL relationship. The terminal may determine, according to the determined SSB beam sequence number, a reference signal that satisfies the QCL relationship of the CSI-RS resource or resource set indicated by the PDCCH.

Optionally, the terminal determines the QCL reference signal used by the CSI-RS resource that meets the time requirement. Optionally, the terminal determines the time requirement of the QCL reference signal used by the CSI-RS resource according to the indication signal. For example, the terminal determines the time according to the frame number P where the indication signal is received. The terminal determines that the time is the first time slot after the frame number P that uses the frame number SFN and satisfies (SFN+PF_offset)%T=0. T is the period of the paging cycle. PF_offset is the paging frame offset parameter. From this time slot, the terminal determines the related QCL reference signal used by the indicated CSI-RS resource. Optionally, the terminal determines the time at which the CSI-RS resource uses the QCL reference signal according to the indication signal and the time length. For example, the terminal determines that the length of the network indication is kT, and according to the frame number P where the indication signal is received, the terminal determines that the first time slot with frame number SFN that satisfies (SFN+PF_offset)%kT=0 after P is satisfied. , the indicated CSI-RS uses the associated QCL reference signal. k is the time length parameter, an integer greater than 0. % is the modulo operation. The time length parameter can be indicated to the terminal by means of RRC signaling or DCI. The time length parameter can also be indicated to the terminal in a predefined manner.

Optionally, the terminal determines according to the indication signal that the CSI-RS signal does not use the QCL reference signal. Exemplarily, the UE determines that CSI-RS i is sent using SSB j as a QCL reference signal according to the configuration or the indication. The UE receives an instruction on the PDCCH that satisfies the QCL relationship with SSB k, indicating that CSI-RS i uses SSB k as the QCL reference signal, and the terminal determines that on the resources that meet the time requirement, CSI-RS i does not use SSB j as the QCL reference signal .

Optionally, the terminal determines that the CSI-RS signal that uses the QCL reference signal with the same indication signal does not use the QCL reference signal. Exemplarily, the UE determines that the resource corresponding to CSI-RS i uses SSB j as the QCL reference signal according to the configuration or the indication. The UE does not receive an indication on the PDCCH of SSB j indicating that the resource corresponding to CSI-RS i uses SSB j as the QCL reference signal for transmission, and the terminal determines that on the resource that meets the time requirement, CSI-RS i does not use SSB j as the QCL reference signal Signal.

Optionally, the terminal determines that the CSI-RS resource or resource set and the indicator signal use the same QCL reference signal. Optionally, the network may configure several CSI-RS resources or resource sets as candidate signal sets that satisfy the QCL relationship with SSB i. The network may select some or all of the candidate signals to use SSB i as the QCL reference signal, and instruct the terminal on the indication signal to use the SSB i as the QCL reference signal. The network uses the indicator signal to indicate the information of the used CSI-RS in the candidate signal set. Optionally, a bitmap is used to indicate, for example, that the network configures SSB i to use k CSI-RS resource sets as candidate signal sets, and they are sorted according to their ID size. A field with an effective length of k bits may be used in the indication information received by the terminal, and each bit corresponds to a different candidate CSI-RS resource or resource set.

Optionally, the terminal determines according to the indication message that the CSI-RS uses a corresponding QCL reference signal. Optionally, the bitmap indication method is used, and the bitmap corresponds to the CSI-RS resources or resource sets sorted from the low order. If the indication state corresponding to the CSI-RS or CSI-RS resource set in the indication signal is 1, the terminal It is determined that the CSI-RS corresponding to the CSI-RS or the CSI-RS resource set uses the same QCL reference signal as the indicator signal. If the indication state corresponding to the CSI-RS or the CSI-RS resource set in the indication signal is 0, the UE determines that the CSI-RS corresponding to the CSI-RS or the CSI-RS resource set does not use the same QCL reference signal as the indication signal. Similarly, opposite indication states or indication methods with different arrangement orders may also be used, which will not be described in detail.

Optionally, the quantity indication method is used. For example, the network configures SSB i to use K CSI-RS resource sets as candidate signal sets, and they are sorted by their ID size. A field with an effective length of ceil(log2(K)) bits may be used in the indication information received by the terminal to indicate the number of used CSI-RS resource sets. ceil is a round-up operation, and log2 is a base-2 logarithmic operation. If the number of candidate signals indicated in the indicator signal is 0, none of the CSI-RSs in the candidate signal set uses the reference signal as the QCL reference signal. If the indicated number is k, the first k resources in the reference signal candidate resources use the same QCL reference signal as the indicated signal, and the remaining CSI-RS resources do not use the QCL reference signal.

Optionally, the terminal determines, according to the distance information in the indication signal, a CSI-RS resource or resource set that uses the same QCL reference signal as the indication signal. Exemplarily, the network uses the paging PDCCH to indicate the QCL information used by the CSI-RS resources. The terminal determines that the CSI-RS uses the same QCL reference signal as the PDCCH according to the distance between the indicated CSI-RS signal and the time slot or symbol where the paging PDCCH is located. The distance can be the number of time slots, time units or symbols. Wait. The distance may also be the number of time slots, time units, or symbols represented by the sequence numbers in a predefined or configured table.

Exemplarily, the distance information uses the number of time slots. If the indicator signal and the CSI-RS use the same subcarrier spacing parameter and cyclic prefix length, the two use the same time slot unit. If the subcarrier detection parameters or cyclic prefix lengths used by the two are different, and the time slot units used by the two are different, the terminal may determine to use the time slot unit corresponding to the smaller subcarrier detection parameter as a reference for the distance. Optionally, the terminal determines that the time slot that satisfies the indicated time slot distance from the time slot where the paging PDCCH is located is the time slot where the CSI-RS resource using the same QCL reference signal is located. Optionally, the terminal determines that the last time slot of the CSI-RS resource in the CSI-RS resource set of the same QCL reference signal is used for the time slot that meets the indicated time slot distance from the time slot where the paging PDCCH is located. Optionally, the terminal determines that the time slot that meets the indicated time slot distance from the time slot where the paging PDCCH is located is the first time slot where the CSI-RS resource using the same QCL reference signal is located.

Optionally, when the CSI-RS does not use any QCL reference signal, the CSI-RS is not sent.

Optionally, when the CSI-RS does not use any QCL reference signal, the terminal does not receive the CSI-RS.

[Example 2]

FIG. 2 is a flowchart illustrating a method performed by a user equipment according to Embodiment 2 of the present invention.

As shown in FIG. 2, in step 201, configuration parameters and indication information used by CSI-RS resources or resource sets are received.

Then, in step 203, the terminal determines the CSI-RS and the QCL reference signal used by the CSI-RS according to the received configuration parameter and the indication information.

Optionally, the network configures the CSI-RS resource, and uses the transmission configuration indication information to identify the transmission configuration indication information parameter indicating the use of the resource. For example, the terminal determines a reference signal used by a TCI-state corresponding to a TCI-state ID, and determines a QCL reference signal used by a CSI-RS resource using the TCI-state configuration parameter. Optionally, multiple CSI-RS resources may form a CSI-RS resource set. The network can configure a TCI-state ID for a resource set, and the resources in the resource set all use the TCI-state parameter identified by the same TCI-state ID. The terminal may determine, according to the TCI-state configuration parameter, a reference signal that satisfies the QCL relationship used by using the CSI-RS resource or resource set of the TCI-state parameter group. Exemplarily, the TCI-state parameter may include parameters such as the used QCL type. The TCI-state parameter may also contain candidate QCL reference signals or no QCL reference signals available.

Optionally, the terminal may determine the reference signal used for transmitting the configuration indication information according to the indication information, and determine the reference signal used by the CSI-RS resource. Exemplarily, one TCI-state includes multiple candidate reference signals or reference signal groups. The terminal determines that the TCI-stateID used by a CSI-RS resource is i, and the terminal determines to use the TCI-state configuration whose TCI-stateID is i. The network configures a TCI-state whose TCI-stateID is i to use one or more QCL reference signals. Optionally, one or more QCL signals may be divided into one or more groups. The terminal selects one or a group of QCL reference signals as reference signals of the CSI-RS resource according to the indication information. Optionally, the network may configure one or more TCI-states whose TCI-stateID is i to use the same or different QCL reference signals. The network may use different groups or patterns to determine the QCL reference signal used by the TCI-state whose TCI-stateID is i. For example, the TCI-state configuration reference signal SSB k with TCI-stateID i in network configuration group m is used as the QCL reference signal, and the TCI-state configuration reference signal SSB s with TCI-stateID i in network configuration group n is used as the QCL reference signal. The terminal receives the indication information from the network, indicating to use the CSI-RS with TCI-stateID i to use group m, and the terminal can determine to use the QCL reference signal SSB k of the corresponding TCI-state configuration parameter in group m as the QCL reference signal of the CSI-RS.

Optionally, the terminal determines the reference signal used by the CSI-RS according to the indication message. Optionally, the terminal determines the reference signal of the TCI-state used by the CSI-RS according to the indicated sequence number. Exemplarily, one or more groups of reference signals are used in the TCI-state, and the terminal determines the reference signals used in the TCI-state according to the serial number of the group. Exemplarily, different groups of TCI-states use the same or different reference signals, and the terminal determines the reference signals used by the TCI-states according to the serial numbers of the groups. The terminal determines the used QCL reference signal according to the TCI-state used by the CSI-RS. Optionally, the terminal receives the indication in the paging PDCCH, determines the group used by the configured CSI-RS, and determines the QCL reference signal used by the CSI-RS. Optionally, the terminal receives the indication in the common PDCCH, determines the group used by the configured CSI-RS, and determines the QCL reference signal used by the CSI-RS. Optionally, the terminal receives the indication in the common PDSCH, determines the group used by the configured CSI-RS, and determines the QCL reference signal used by the CSI-RS.

Optionally, the TCI-state whose TCI-stateID is i in the network configuration group m does not use the QCL reference signal, and the terminal receives an instruction from the network to indicate that the CSI-RS with the TCI-stateID is i to use the group m, and the terminal can determine the use of the group m. The CSI-RS of m does not use the QCL reference signal.

Optionally, the terminal determines the scrambling code used by the CSI-RS according to the group indicated by the network. For example, the scrambling code in the network configuration group m is A, and the scrambling code in the network configuration group n is B. The terminal receives an instruction from the network, indicating to use the CSI-RS i to use the group m, and the terminal may determine to use the scrambling code in the group m as the scrambling code of the CSI-RS.

Optionally, the terminal determines the QCL reference signal used by the CSI-RS resource that meets the time requirement. Optionally, the terminal determines the time requirement of the QCL reference signal used by the CSI-RS resource according to the indication signal. For example, the terminal determines the time according to the frame number P where the indication signal is received. The terminal determines that the time is the first time slot after the frame number P that uses the frame number SFN and satisfies (SFN+PF_offset)%T=0. T is the period of the paging cycle. PF_offset is the paging frame offset parameter. % is the modulo. From this time slot, the terminal determines the related QCL reference signal used by the indicated CSI-RS resource. Optionally, the terminal determines the time at which the CSI-RS resource uses the QCL reference signal according to the indication signal and the length of the indication. For example, the terminal determines that the length of the network indication is kT, and according to the frame number P where the indication signal is received, the terminal determines that the first time slot with frame number SFN that satisfies (SFN+PF_offset)%kT=0 after P is satisfied. , the indicated CSI-RS uses the associated QCL reference signal. k is an integer greater than 0.

Optionally, the terminal determines according to the indication signal that the CSI-RS signal does not use the QCL reference signal. Exemplarily, the terminal determines, according to the indication signal, that the TCI-state in the CSI-RS signal usage group does not use the reference signal, and the CSI-RS determined by the terminal does not use the QCL reference signal. Exemplarily, the UE determines, according to the configuration or other instructions, that CSI-RS i is sent using SSB j as a QCL reference signal. The UE receives an instruction indicating that the resource corresponding to CSI-RS i uses SSB k as the QCL reference signal for transmission, and the terminal determines that on the resource that meets the time requirement, CSI-RS i does not use SSB j as the QCL reference signal.

Optionally, the terminal determines that the CSI-RS signal using the QCL reference signal no longer uses the QCL reference signal. For example, according to the configuration or other instructions, the terminal determines that the resource corresponding to CSI-RS i uses SSB j as the QCL reference signal to send. The terminal does not receive an indication signal indicating that the resource corresponding to CSI-RS i uses SSB j as the QCL reference signal for transmission, and the terminal determines that on the resource that meets the time requirement, CSI-RS i does not use SSB j as the QCL reference signal.

Optionally, when the CSI-RS does not use any QCL reference signal, the CSI-RS is not sent.

Optionally, when the CSI-RS does not use any QCL reference signal, the terminal does not receive the CSI-RS.

[Example 3]

FIG. 3 is a flowchart illustrating a method performed by a user equipment according to Embodiment 3 of the present invention.

The network equipment configures CSI-RS resources or resource sets. The network equipment may adjust some or all of the CSI-RS beams according to the needs of the network, that is, adjust the QCL reference signal of the CSI-RS, or may not perform some or all of them according to the needs of the network. Transmission of CSI-RS.

As shown in FIG. 3 , in step 301, when the network does not send a corresponding indication, or the terminal does not receive an indication to determine the QCL reference signal used by the configured CSI-RS, the terminal can test.

In step 303, when the detected signal strength exceeds a predetermined threshold, or the detected signal meets a QCL relationship with a certain SSB beam, the terminal confirms the availability of the signal during the transmission period of the signal, and the use of the signal. QCL reference signal.

Optionally, the idle state terminal determines the validity of the signal in time according to the measurement of the CSI-RS signal. The terminal receives the CSI-RS resource or resource set parameter configured by the network, and determines the time-frequency position of the CSI-RS. The terminal performs detection or measurement at the time-frequency position. If a CSI-RS signal that meets the conditions is detected, it determines a reference signal that satisfies the QCL with the signal. The terminal determines that it is within the time range, and the CSI-RS uses the QCL reference signal.

Exemplarily, the network configures CSI-RS resources or resource set parameters, and uses SSB i as the QCL reference signal. The terminal detects the CSI-RS at the time-frequency position that satisfies the configuration. Optionally, the detected signal received power RSRP exceeds a threshold, and the terminal determines the validity of the CSI-RS in time. Optionally, the difference between the detected signal received power RSRP and the measured RSRP of SSB i is less than a threshold, and the terminal determines the validity of the CSI-RS in time. For example, the network configures the power offset of the RE of the CSI-RS relative to the RE of the SS to be zero. If the terminal detects that the RSRP _CSI-RS- RSRP _SS -O is less than the threshold k, the terminal determines that the CSI-RS is a valid signal. The terminal determines the validity of the CSI-RS in time, that is, the terminal determines that the CSI-RS uses SSB i as the QCL reference information in the time-frequency resource and the determined time range of the CSI-RS configuration.

The optional terminal determines the temporal validity of the CSI-RS according to the detected CSI-RS position. The validity of time can be represented by time length, radio frame number, etc. In an example method, the terminal determines the frame number SFNi of the CSI-RS on the paging cycle, and the terminal determines the starting point and length of the valid time of the CSI-RS signal. The terminal determines that the start of the valid time is that the frame number SFN satisfies (SFN+PF_offset)%kT=0, and the valid length is kT. Where T is the length of the paging cycle, and k is an integer greater than 0. In another method, the terminal determines that the starting frame number of the valid time is the first time slot whose SFN satisfies mod(floor((i+PF_offset)/T)*T-PF_offset, 1024), and the valid length is ceil(k* T/P)*P, where P is the period of the CSI-RS. T is the length of the paging cycle, and k is an integer greater than 0.

[Variation]

In the following, FIG. 4 is used to illustrate a user equipment that can execute the method performed by the user equipment described in detail above in the present invention as a modification.

FIG. 4 is a block diagram showing a user equipment UE according to the present invention.

As shown in FIG. 4 , the user equipment UE40 includes a processor 401 and a memory 402 . The processor 401 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like. The memory 402 may include, for example, volatile memory (eg, random access memory RAM), a hard disk drive (HDD), non-volatile memory (eg, flash memory), or other memory, or the like. Program instructions are stored on the memory 402 . When the instruction is executed by the processor 401, the above method described in detail in the present invention and executed by the user equipment can be executed.

The method and related apparatus of the present invention have been described above with reference to the preferred embodiments. Those skilled in the art can understand that the methods shown above are only exemplary, and the various embodiments described above can be combined with each other under the condition that no contradiction occurs. The method of the present invention is not limited to the steps and sequences shown above. The network node and user equipment shown above may include more modules, for example, may also include modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs, and so on. The various identifiers shown above are only exemplary and not restrictive, and the present invention is not limited to the specific information elements exemplified by these identifiers. Numerous changes and modifications may occur to those skilled in the art in light of the teachings of the illustrated embodiments.

It should be understood that the above-described embodiments of the present invention may be implemented by software, hardware, or a combination of both. For example, the various components inside the base station and the user equipment in the above embodiments may be implemented by various devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processing Controllers, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), etc.

In this application, "base station" may refer to a mobile communication data and control switching center with larger transmission power and wider coverage area, including functions such as resource allocation and scheduling, data reception and transmission, and the like. "User equipment" may refer to a user mobile terminal, for example, including a mobile phone, a notebook, and other terminal equipment that can wirelessly communicate with a base station or a micro base station.

Furthermore, embodiments of the invention disclosed herein may be implemented on a computer program product. More specifically, the computer program product is a product having a computer-readable medium on which computer program logic is encoded that, when executed on a computing device, provides relevant operations to achieve The above technical solutions of the present invention. When executed on at least one processor of a computing system, computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention. Such arrangements of the present invention are typically provided as software, code and/or other data structures arranged or encoded on a computer readable medium such as an optical medium (eg CD-ROM), floppy or hard disk, or such as one or more Firmware or other medium of microcode on a ROM or RAM or PROM chip, or a downloadable software image in one or more modules, a shared database, etc. Software or firmware or such a configuration may be installed on a computing device, so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present invention.

In addition, each functional module or each feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is usually one or more integrated circuits. Circuits designed to perform the various functions described in this specification may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs) or general purpose integrated circuits, field programmable gate arrays (FPGAs) or other Program logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above. A general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The general-purpose processor or each circuit described above may be configured by digital circuits, or may be configured by logic circuits. In addition, when an advanced technology that can replace the current integrated circuit appears due to the advancement of semiconductor technology, the present invention can also use the integrated circuit obtained by using the advanced technology.

Although the present invention has been shown in conjunction with the preferred embodiments thereof, those skilled in the art will appreciate that various modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention. Therefore, the present invention should not be limited by the above-described embodiments, but should be defined by the appended claims and their equivalents.

Claims (10)

1. A method performed by a user equipment UE, comprising: receiving an indication signal indicating a channel state information reference signal CSI-RS resource or resource set; and According to the received indication signal, determine the CSI-RS resource or resource set that satisfies the quasi-co-located QCL relationship with the reference signal used by the indication signal. 2. The method of claim 1, wherein, According to the indication signal, it is determined that a part or all of the CSI-RS resources or resource sets indicated in the indication signal use the same QCL reference signal as the indication signal. 3. The method of claim 1, wherein, According to the indication signal, the QCL reference signal used by the CSI-RS resource or resource set that meets the time requirement is determined. 4. A method performed by user equipment UE, comprising: receiving channel state information reference signal CSI-RS resources or resource sets using configuration parameters and indication information; and A quasi-co-located QCL reference signal used by the CSI-RS resource or resource set is determined according to the received configuration parameter and the indication information. 5. The method of claim 4, wherein, The configuration parameter is a transmission configuration indication state TCI-state configuration parameter, and the indication information indicates the reference signal used by the TCI-state, According to the TCI-state configuration parameter and the indication information, the QCL reference signal used by the CSI-RS resource or resource set using the TCI-state configuration parameter is determined. 6. The method of claim 5, wherein, Different QCL reference signals used by the CSI-RS resource or resource set are determined according to different TCI-state configuration parameters. 7. The method of claim 4, wherein, According to the configuration parameter, the QCL reference signal used by the CSI-RS resource or resource set that meets the time requirement is determined. 8. A method performed by a user equipment UE, comprising: Detecting the configured CSI-RS signal without receiving an indication signal for determining the QCL reference signal used for the channel state information reference signal CSI-RS resource or resource set; and When the strength of the detected CSI-RS signal exceeds a predetermined threshold, or the detected CSI-RS signal and the reference signal satisfy the quasi-co-located QCL relationship, confirm that the CSI-RS signal is within the transmission period of the CSI-RS signal availability, and the QCL reference signal used by this CSI-RS signal. 9. The method of claim 8, wherein, The temporal validity of the CSI-RS signal is determined according to the detected position of the CSI-RS signal. 10. A user equipment comprising: processor; and memory, storing instructions, wherein the instructions, when executed by the processor, perform the method of any one of claims 1 to 9.

Images