CN114390576A

CN114390576A - Link monitoring method, device, equipment and computer readable storage medium

Info

Publication number: CN114390576A
Application number: CN202210186045.7A
Authority: CN
Inventors: 熊芳; 汪玲
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-04-22

Abstract

If the interval between a first radio link monitoring RLM resource and a second RLM resource in a time domain is larger than a threshold value, UE measures an RLM signal carried by the first RLM resource; the first RLM resource and the second RLM resource are communication resources configured by the network side for periodically sending RLM signals, and the second RLM resource is a communication resource corresponding to the last RLM signal measured by the UE. By adopting the method, the power consumption of the user equipment can be reduced.

Description

Link monitoring method, device, equipment and computer readable storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a link monitoring method, apparatus, device, and computer-readable storage medium.

Background

In a communication system, a user equipment may evaluate the channel quality of a downlink of a serving cell through Radio Link Monitor (RLM), so as to determine whether the state of the downlink IS In-sync (In-sync, referred to as IS) or Out-of-sync (Out-of-sync, referred to as OOS). In case the status of the downlink is out of sync, the user equipment may trigger link re-establishment.

In a 5th Generation Mobile Communication Technology (5G) system, a User Equipment (User Equipment, UE) may measure a Synchronization Signal and PBCH block (SSB) and/or a Reference Signal (CSI-RS) sent by a network side, and determine a link State according to a measurement result; the above measurement procedure results in large power consumption of the UE.

Disclosure of Invention

The embodiment of the application provides a link monitoring method, a link monitoring device, link monitoring equipment and a computer readable storage medium, which can reduce the power consumption of user equipment.

In a first aspect, a method for link monitoring includes:

if the time interval between the first radio link monitoring RLM resource and the second RLM resource is larger than the threshold value, the user equipment UE measures the RLM signal carried by the first RLM resource;

the first RLM resource and the second RLM resource are communication resources configured by the network side for periodically sending RLM signals, and the second RLM resource is a communication resource corresponding to the last RLM signal measured by the UE.

In a second aspect, a method for monitoring a link, the method further includes:

the UE selects a target RLM resource from a plurality of RLM resources configured on the network side according to the receiving power of the wave beam;

the UE measures a target RLM signal carried by the target RLM resource.

In a third aspect, a link monitoring device includes:

a measurement module, configured to measure, when an interval between a first radio link monitoring RLM resource and a second RLM resource in a time domain is greater than a threshold, an RLM signal carried by the first RLM resource;

In a fourth aspect, a link monitoring device includes:

a selection module, configured to select a target RLM resource from multiple RLM resources configured on a network side according to the received power of the beam;

and the measurement module is used for measuring the target RLM signal carried by the target RLM resource.

In a fifth aspect, a user equipment includes a memory and a processor, wherein the memory stores a computer program, and the computer program, when executed by the processor, causes the processor to perform the steps of the above-mentioned link monitoring method.

In a sixth aspect, a computer readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the above-mentioned link monitoring method.

In a seventh aspect, a computer program product comprises a computer program which, when executed by a processor, performs the steps of the above-described link monitoring method.

According to the link monitoring method, the device, the equipment and the computer readable storage medium, if the time interval between the first radio link monitoring RLM resource and the second RLM resource is greater than the threshold value, the UE measures the RLM signal carried by the first RLM resource; the first RLM resource and the second RLM resource are communication resources configured by the network side for periodically sending RLM signals, and the second RLM resource is a communication resource corresponding to the last RLM signal measured by the UE. The UE compares the time interval of the first RLM resource and the second RLM resource in the time domain with the threshold value, starts to measure the RLM signals carried by the first RLM resource under the condition that the time interval is larger than the threshold value, namely, the RLM signals periodically sent by the network side are screened according to the threshold value, and the RLM signals carried in partial RLM resources are selected to be measured, so that the times of awakening the UE in the dormancy period due to the measurement of the RLM signals in the wireless link monitoring can be reduced, and the power consumption of the UE is reduced.

According to the link monitoring method, the device, the equipment and the computer readable storage medium, the UE selects the target RLM resource from the plurality of RLM resources configured on the network side according to the receiving power of the wave beam; then, a target RLM signal carried by the target RLM resource is measured. The UE selects the target RLM resource from the plurality of RLM resources configured on the network side and measures the target RLM signal carried by the target RLM resource, so that the link monitoring result can be determined after all the RLM signals configured on the network side are measured, the extreme speed complexity of link monitoring is reduced, and the power consumption of the equipment is reduced; further, the UE selects a target RLM resource from the plurality of RLM resources according to the received power of the beam, so that the target RLM resource can meet the performance requirement for monitoring the radio link, and the power consumption of the device can be reduced while ensuring the performance of monitoring the link.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an application environment diagram of a link monitoring method according to an embodiment of the present application;

FIG. 2 is a flow chart of a link monitoring method according to an embodiment of the present application;

fig. 3 is a diagram illustrating a DRX cycle of a link monitoring method according to an embodiment of the present application;

FIG. 4 is a diagram illustrating a link monitoring method according to an embodiment of the present application;

FIG. 5 is a flow chart of a link monitoring method according to an embodiment of the present application;

FIG. 6 is a flow chart of a link monitoring method according to an embodiment of the present application;

FIG. 7 is a flow chart of a link monitoring method according to an embodiment of the present application;

FIG. 8 is a flow chart of a link monitoring method according to an embodiment of the present application;

fig. 9 is a block diagram of a link monitoring device according to an embodiment of the present application;

FIG. 10 is a block diagram of a link monitoring device according to an embodiment of the present application;

fig. 11 is a block diagram of a link monitoring device according to an embodiment of the present application;

fig. 12 is a block diagram of a link monitoring device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a user equipment in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Fig. 1 is a schematic view of an application scenario of the link monitoring method according to the embodiment of the present application. As shown in fig. 1, the scenario includes a network device 100 and a UE200, and the network device 100 and the terminal 200 communicate through a network. The network device 100 may be a Base Transceiver Station (BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (evolved Node B, eNB or eNodeB) in LTE, a relay Station or Access point, or a Base Station in a 5G network, and the like, which are not limited herein.

The UE200 may be a wireless terminal, which may refer to a device that provides voice and/or other traffic data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. For example, devices such as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs) are used.

The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

In one embodiment, as shown in fig. 2, a link monitoring method is provided, which is illustrated by applying the method to the UE in fig. 1, including

S101, determining whether the interval between the first radio link monitoring RLM resource and the second RLM resource in the time domain is larger than a threshold value; the first RLM resource and the second RLM resource are communication resources configured by the network side for periodically sending RLM signals, and the second RLM resource is a communication resource corresponding to the last RLM signal measured by the UE.

And S102, if so, the UE measures the RLM signal carried by the first RLM resource.

And if the interval between the first radio link monitoring RLM resource and the second RLM resource in the time domain is larger than the threshold value, the user equipment UE measures the RLM signal carried by the first RLM resource.

The RLM resource is a communication resource configured for the UE by the network side. The network side may send one or more RLM signals to the UE, where the RLM signals may be SSB signals, CSI-RS signals, and may also include SSB signals and CSI-RS signals, which is not limited herein. Different RLM signals correspond to different RLM resources, and the network side may configure a plurality of RLM resources for the UE. Taking UE accessing 5G network as an example, the number of RLM resources configured for UE by the network side may be referred to the following table:

carrier frequency range of a UE	Number of RLM resources
		FR1,≤3GHz	2
FR1＞3GHz	4
		FR2	8

FR1 is a frequency range smaller than 6GHz in the 5G system, and FR2 is a millimeter wave frequency range in the 5G system.

The network side may periodically transmit the same RLM signal to the UE, that is, the network side may configure, for the UE, an RLM resource for periodically transmitting the RLM signal and a transmission period corresponding to the RLM resource. The corresponding transmission periods of different RLM resources may be the same or different. The network side may configure RLM resource information to the UE through the RRC configuration information, where the RLM resource information may include a transmission period of each RLM resource, a start position of each RLM resource, and the like. For example, the network side configures X RLM resources for the UE, which are respectively denoted as { n_iI is more than or equal to 1 and less than or equal to X, and the sending period corresponding to the X RLM resources can be { T ≦ X }, where_i,1≤i≤X}。

For one of the RLM signals, the first RLM resource and the second RLM resource may be communication resources configured by the network side for periodically transmitting the RLM signal. After the UE receives the RLM signal in the second RLM resource and measures the RLM signal, the last measurement time of the RLM signal may be recorded as M_i,latest. The UE may be in M_i,latestFor reference, it is determined whether to measure the RLM signal carried in the first RLM resource. The UE measures the RLM signal, and may obtain the signal quality of the RLM signal, where the signal quality may be a signal-to-noise ratio of the RLM signal, or a signal-to-interference-and-noise ratio of the RLM signal, and is not limited herein.

In one implementation, the UE may determine the most recent measurement time M of the RLM signal_i,latestBased on the received RLM resource, the next RLM resource is determined according to the sending period of the RLM resource configured by the network sideTime M of second occurrence of first RLM resource_i,nextThen obtaining M_i,latestAnd M_i,nextThe time interval in between; if the time interval is greater than a preset threshold, the RLM signal carried in the first RLM resource may be measured. And if the interval between the first RLM resource and the second RLM resource in the time domain is not greater than the threshold value, the UE ignores the RLM signal carried in the first RLM resource.

In another implementation, after receiving the RLM signal in the first RLM resource, the UE may record the occurrence time of the second RLM resource as M_i,nextThen the last measurement moment M of the recorded RLM signal is obtained_i,latestThe last measured RLM signal may be carried in the second RLM resource. UE can obtain M_i,latestAnd M_i,nextThe time interval in between; if the time interval is greater than a preset threshold, the RLM signal carried in the first RLM resource may be measured. And if the interval between the first RLM resource and the second RLM resource in the time domain is not greater than the threshold value, the UE ignores the RLM signal carried in the first RLM resource.

The threshold may be related to a DRX cycle of the UE, and the threshold may be equal to or greater than the DRX cycle, which is not limited herein.

For multiple RLM resources configured on the network side, after a UE measures all of multiple RLM signals carried in the multiple RLM resources in one evaluation period, the UE reports a link status to an L3 layer of the UE through an L1 layer of the UE. Optionally, the terminal may measure an RLM signal carried by a part of the plurality of RLM resources configured on the network side. If the signal quality of each RLM signal is less than the first signal quality threshold Qout, the L1 layer of the UE may send an OOS indication to the L3 layer; if the signal quality of one of the RLM signals IS greater than the second signal quality threshold Qin, the L1 layer of the UE may send an IS indication to the L3 layer. The first signal quality threshold may be smaller than the second signal quality threshold, for example, the block error rate corresponding to the first signal quality threshold may be 10%, the block error rate corresponding to the second signal quality threshold may be 2%, and the larger the block error rate, the worse the signal quality.

After an L1 layer in the UE reports OOSs to an L3 layer, the UE may start a counter corresponding to the OOSs, and count the number of OOSs reported by an L1 layer; after the number of OOSs IS greater than the preset number threshold, the UE may trigger a timer (e.g., T310) to start timing, and if an IS indication reported by the L1 layer IS not received during the timing of the timer, it may determine that the current link status IS out-of-synchronization, and trigger link re-establishment.

In the above link monitoring method, if the time interval between the first radio link monitoring RLM resource and the second RLM resource is greater than the threshold, the UE measures the RLM signal carried by the first RLM resource; the first RLM resource and the second RLM resource are communication resources configured by the network side for periodically sending RLM signals, and the second RLM resource is a communication resource corresponding to the last RLM signal measured by the UE. The UE compares the time interval of the first RLM resource and the second RLM resource in the time domain with the threshold value, starts to measure the RLM signals carried by the first RLM resource under the condition that the time interval is larger than the threshold value, namely, the RLM signals periodically sent by the network side are screened according to the threshold value, and the RLM signals carried in partial RLM resources are selected to be measured, so that the times of awakening the UE in the dormancy period due to the measurement of the RLM signals in the wireless link monitoring can be reduced, and the power consumption of the UE is reduced.

In an embodiment, when the interval between the first radio link monitoring RLM resource and the second RLM resource in the time domain is greater than the threshold, the UE may determine the current communication state of the UE when measuring the RLM signal carried by the first RLM resource, and if the UE is in the discontinuous reception DRX state and the time domain range of the first RLM resource is within the DRX active period of the UE, the UE measures the RLM signal carried by the first RLM resource.

When the UE does not have data transmission, a receiving circuit of the UE can be closed to reduce power consumption, so that the endurance time of the battery is prolonged; based on this, the communication state of the UE may include a DRX state and a non-DRX state. In the DRX state, the UE may include an active period (On Duration) and a dormant period (Opportunity for DRX) in each DRX cycle, where the UE receives downlink data sent by the network side in the active period, and the UE does not receive the downlink data in the dormant period, as shown in fig. 3.

The time when the UE receives the RLM signal may be in a sleep period in the DRX cycle. The UE may determine a current communication state of the UE, and if the UE is in the DRX state and the time domain range of the first RLM resource is within the DRX active period of the UE, the UE measures an RLM signal carried by the first RLM resource.

If the UE is in the DRX state and the time domain range of the first RLM resource is within the sleep period of the UE, the UE may ignore the RLM signal carried by the first RLM resource and not perform measurement on the RLM signal.

And if the UE is in the non-DRX state, the UE measures the RLM signal carried by the first RLM resource.

As shown in fig. 4, when the UE measures the RLM signal carried in the second RLM resource (RLM resource a), the measurement time is time T1, and the first RLM resource is RLM resource B occurring at time T2, the time interval between time T2 and time T1 is less than the threshold, and the UE ignores the RLM signal carried in the RLM resource B; when the first RLM resource is an RLM resource C occurring at the time of T3, the time interval between the time of T3 and the time of T1 is smaller than a threshold value, and the UE ignores an RLM signal carried in the RLM resource C; when the first RLM resource is an RLM resource D occurring at time T4, and a time interval between time T4 and time T1 is greater than a threshold value, the UE transmits an RLM signal carried in the RLM resource D. Further, the UE may determine the time T4 as the measurement time at which the RLM signal is most recently measured, and when the RLM resource E occurs at the time T5, a time interval between the time T5 and the time T4 is smaller than a threshold value, and the UE ignores the RLM signal carried in the RLM resource E.

According to the link monitoring method, the UE measures the RLM signal carried by the first RLM resource in the activation period in the time domain range in the DRX state, and ignores the RLM signal carried by the first RLM resource in the dormancy period in the time domain range, so that the number of times of awakening the UE in the dormancy period due to the measurement of the RLM signal in the wireless link monitoring can be avoided, and the power consumption of the UE is reduced.

In one embodiment, the threshold value is determined according to the DRX cycle length and the transmission cycle of the RLM signal when the UE is in the DRX state. The threshold may be the maximum of the DRX cycle length and the transmission cycle of the RLM signalThe value may be a multiple of the DRX cycle length and the maximum value in the transmission cycle of the RLM signal, and is not limited herein. Optionally, the threshold values are a first preset threshold value, n1 times DRX _ cycle _ length, and n2 times T_RLM,MWherein DRX _ cycle _ length is the DRX cycle length, T_RLM,MAnd the minimum transmission period of the RLM signal configured for the network side. Wherein n1 and n2 are both greater than 1, optionally both n1 and n2 are 1.5. The first preset threshold is not greater than the reporting time interval of the link status, and optionally, the first preset threshold is not 10 ms.

In case that the UE is in the non-DRX state, the threshold value is determined according to a transmission cycle of the RLM signal. The threshold may be a transmission period of the RLM signal, or an average value of transmission periods of the RLM signals, which is not limited herein. Optionally, the threshold is a second preset threshold and n3 times T_RLM,MIs of where T_RLM,MA minimum sending period of the RLM signal configured for the network side; n3 is greater than 1; the second preset threshold is not greater than the reporting time interval of the link status. Optionally, n3 is 1, and the second preset threshold is 10 ms. The threshold value may be expressed as:

when the UE is in the DRX state, the threshold value is Max {10ms, 1.5 times DRX _ cycle _ length, 1.5 times T_RLM,M}；

When the UE is in a non-DRX state, the threshold value is Max {10ms, T_RLM,M}。

According to the link monitoring method, the UE determines the threshold value according to the DRX cycle length, so that the probability that the first RLM resource meeting the threshold value requirement falls in the sleep period of the DRX cycle can be reduced, and the power consumption of equipment is reduced.

Fig. 5 is a schematic flow chart of a link monitoring method in an embodiment, which relates to a determination method of an RLM signal measured by a UE, and as shown in fig. 5, the method further includes:

s201, the UE selects a target RLM resource from a plurality of RLM resources configured on the network side according to the received power of the wave beam.

The beam may be a beam carrying the RLM signal, or may be a received power carrying other signals related to the RLM signal, which is not limited herein. Optionally, the beam may be a Reference beam, and the Reference beam may include a first beam carrying a synchronization Signal SSB and/or a second beam carrying a Tracking Reference Signal (TRS Signal).

The UE may track the reference beam with the maximum received power according to the received power of the beam. Further, the UE may determine the target RLM resource according to a coverage relationship between the communication resource corresponding to the reference beam with the largest received power and the plurality of RLM resources. The coverage relationship may be an inclusion relationship, or may be a relationship of whether an intersection exists, which is not limited herein.

The UE tracking range may be different for different types of reference beams. Optionally, the communication resource in the reference beam with the maximum received power may include a first communication resource corresponding to a first beam with the maximum received power, and/or a second communication resource corresponding to at least 4 second beams with the maximum received power.

The plurality of RLM resources include communication resources corresponding to different types of RLM signals. The different types of RLM signals may include a first type of SSB signal, and/or a second type of CSI-RS signal. The plurality of RLM resources may include SSB resources and/or CSI-RS resources, where the SSB resources are used for carrying the RLM signals of the first type and the CSI-RS resources are used for carrying the RLM signals of the second type.

In one implementation, the communication resource in the reference beam with the largest received power includes a first communication resource corresponding to a first beam with the largest received power. The RLM resource may include an SSB resource. When the UE determines the target RLM resource according to the received power of the beam, the UE may determine a coverage relationship between the first communication resource and the SSB resource. If the first communication resource is included in the SSB resource, the UE determines the first communication resource as a target RLM resource; if the first communication resource is not included in the SSB resource, the UE determines, as the target RLM resource, a communication resource that has a Quasi-Co-Location (QCL) relationship with the first communication resource among the SSB resources.

In another implementation manner, the communication resource in the reference beam with the largest received power includes second communication resources corresponding to at least 4 second beams with the largest received power. The RLM resource may include a CSI-RS resource. When the UE determines the target RLM resource according to the received power of the beam, the UE may determine a coverage relationship between the second communication resource and the CSI-RS resource. If the second communication resource and the CSI-RS resource have an intersection, the UE determines the communication resource corresponding to the intersection as a target RLM resource; and if the second communication resource does not have intersection with the CSI-RS resource, the UE determines the communication resource which has QCL relation with the second communication resource in the CSI-RS resource as the target RLM resource.

The QCL relationship means that if two signals are from the same beam or from the same antenna port, the two signals can be considered to have the QCL relationship.

If there is no target RLM resource satisfying the condition according to the coverage relation, the RLM signals corresponding to all RLM resources configured on the network side are measured, that is, all RLM resources are determined as the target RLM resources.

S202, for the RLM signal carried by the target RLM resource, if the time interval between the first RLM resource for radio link monitoring and the second RLM resource is greater than the threshold, performing a measurement on the RLM signal carried by the first RLM resource.

Upon determining the target RLM resource, the UE may perform the above step S101 for the RLM signal carried by the target RLM resource. For other RLM resources except for the target RLM resource in the plurality of RLM resources configured on the network side, the UE may not measure the RLM signals carried by the UE.

According to the link monitoring method, the UE selects the target RLM resource from the plurality of RLM resources configured on the network side and measures the target RLM signal carried by the target RLM resource, so that the link monitoring result can be determined after all the RLM signals configured on the network side are measured, the extreme speed complexity of link monitoring is reduced, and the power consumption of equipment is reduced; further, the UE selects a target RLM resource from the plurality of RLM resources according to the received power of the beam, so that the target RLM resource can meet the performance requirement for monitoring the radio link, and the power consumption of the device can be reduced while ensuring the performance of monitoring the link.

Fig. 6 is a schematic flowchart of a link monitoring method in an embodiment, where the embodiment relates to a manner in which a UE measures an RLM signal, and on the basis of the embodiment, as shown in fig. 6, the S101 includes:

s301, determining a frequency domain down-sampling rate according to the signal bandwidth of the RLM signal and the channel estimation result.

The signal bandwidth of the RLM signal is configured by the network side, and the UE can obtain the configuration information sent by the network side. The channel estimation result may be a channel estimation result of the RLM signal, or may be a channel estimation result of another signal related to the RLM signal, which is not limited herein. The channel estimation result obtained by the RLM signal may be a channel estimation result corresponding to a signal of a non-diversity type in the RLM signal, for example, a channel estimation result corresponding to an SSB signal, or a channel estimation result corresponding to a CSI-RS signal, or may be a channel estimation solution for all RLM signals carried in the first RLM resource, and the type of the channel estimation result is not limited herein. Optionally, the channel estimation result includes a channel estimation result of the RLM signal, and/or a channel estimation result of a reference signal associated with the RLM signal having the quasi-co-located QCL.

When determining the frequency domain down-sampling rate according to the signal bandwidth of the RLM signal and the channel estimation result, the UE may determine the frequency domain down-sampling rate corresponding to the RLM signal according to a preset correspondence between the signal bandwidth and/or the channel estimation result and the frequency domain down-sampling rate. Optionally, the UE may determine a relevant bandwidth corresponding to the RLM signal according to the channel estimation result; then, a frequency domain down-sampling rate is determined based on the correlation bandwidth and the signal bandwidth. The frequency domain correlation between any two frequency points in the related bandwidth is greater than a preset threshold, that is, in one related bandwidth, the frequency domain correlation between the frequency points is higher, and the frequency selection characteristic similarity is higher.

When determining the relevant bandwidth according to the channel estimation result, the UE may determine a root mean square delay spread value corresponding to the channel estimation result; and then determining the related bandwidth associated with the root mean square extension value corresponding to the channel estimation result as the related bandwidth corresponding to the RLM signal according to the corresponding relation between the preset root mean square delay extension value and the related bandwidth.

Based on the above steps, the UE may determine the frequency domain down-sampling rate according to the correlation bandwidth and the signal bandwidth. The UE may calculate a ratio between the signal bandwidth and the correlation bandwidth, and determine the ratio as the number of reference sampling points. The UE may determine the frequency domain down-sampling rate according to the number of reference samples. In one implementation, the UE may determine a sampling rate corresponding to the number of the reference sampling points as a frequency domain down-sampling rate of the RLM signal; that is, the UE may perform frequency domain sampling once in a frequency domain range corresponding to the same correlation bandwidth. Optionally, in order to ensure robustness of frequency domain sampling, the UE may preset a number of reference sampling points, where the number of reference sampling points may be a minimum value of the number of frequency domain sampling points, and the UE may determine a maximum value between the number of reference sampling points and the number of preset sampling points as a target number of sampling points; and then determining the ratio of the sampling bandwidth to the number of the target sampling points as the frequency domain down-sampling rate.

The signal bandwidth of the RLM signal can be BW_iThe root mean square delay spread of the channel estimation result to a determined correlation bandwidth can be B_iThe number of reference sampling points can be BW_i/B_iThrough BW_i/B_iThe sample points may characterize the frequency domain channel characteristics of the RLM signal. The number of the preset reference sampling points of the UE can be F_thresholdThe number of target sampling points can be expressed as max (F)_threshold,BW_i/B_i) The above sampling bandwidth F_sampleThe frequency domain bandwidth corresponding to the first RLM resource may be represented by the frequency domain down-sampling rate:

and S302, measuring the RLM signal carried by the first RLM resource by adopting a frequency domain down-sampling rate.

After determining the frequency domain down-sampling rate, the UE may sample the frequency domain down-sampling rate to measure the RLM signal carried by the first RLM resource, and obtain the signal quality of the RLM signal.

According to the link monitoring method, the UE can reduce the measurement complexity when the RLM signal is measured by reducing the frequency domain sampling rate, and the power consumption of the equipment is reduced.

In an embodiment, as shown in fig. 7, a link monitoring method is provided, which is described by taking the UE in fig. 1 as an example, and includes:

s401, the UE selects a target RLM resource from a plurality of RLM resources configured on the network side according to the received power of the wave beam.

The process of determining the target RLM resource by the UE according to the received power of the beam may refer to the embodiment corresponding to fig. 5, which is not described herein again.

S402, the UE measures the target RLM signal carried by the target RLM resource.

After determining the target RLM resources, the UE may make measurements on target RLM signals carried by the target RLM resources.

The UE may measure all the RLM signals carried by each target RLM resource that is periodically transmitted, or may measure a part of the target RLM resources that is periodically transmitted, which is not limited herein.

The UE may measure the target RLM signal by using a preset frequency domain sampling rate, or may measure the target RLM signal after reducing the frequency domain sampling rate on the basis of the preset frequency domain sampling rate, which is not limited herein.

In the link monitoring method, the UE selects a target RLM resource from a plurality of RLM resources configured on the network side according to the received power of the wave beam; then, a target RLM signal carried by the target RLM resource is measured. The UE selects the target RLM resource from the plurality of RLM resources configured on the network side and measures the target RLM signal carried by the target RLM resource, so that the link monitoring result can be determined after all the RLM signals configured on the network side are measured, the extreme speed complexity of link monitoring is reduced, and the power consumption of the equipment is reduced; further, the UE selects a target RLM resource from the plurality of RLM resources according to the received power of the beam, so that the target RLM resource can meet the performance requirement for monitoring the radio link, and the power consumption of the device can be reduced while ensuring the performance of monitoring the link.

In an embodiment, when the UE selects a target RLM resource from a plurality of RLM resources configured on the network side, the target RLM resource may be determined according to a coverage relationship between a communication resource corresponding to a reference beam with the largest received power and the plurality of RLM resources; wherein the reference beam comprises a first beam carrying the synchronization signal SSB and/or a second beam carrying the tracking reference signal TRS.

In one embodiment, the communication resource in the reference beam with the largest received power includes a first communication resource corresponding to a first beam with the largest received power and/or a second communication resource corresponding to at least 4 second beams with the largest received power.

In an embodiment, the plurality of RLM resources include SSB resources, the SSB resources are used for carrying RLM signals of a first type, the RLM signals of the first type are SSB signals, and when the UE determines the target RLM resource according to a coverage relationship between the communication resource in the reference beam with the largest received power and the plurality of RLM resources, if the first communication resource is included in the SSB resources, the UE determines the first communication resource as the target RLM resource; if the first communication resource is not included in the SSB resource, the UE determines, as the target RLM resource, a communication resource having a quasi co-location QCL relationship with the first communication resource among the SSB resources.

In one embodiment, the plurality of RLM resources include reference signal CSI-RS resources, the CSI-RS resources are used for carrying a second type of RLM signal, the second type of RLM signal is a CSI-RS signal, and when the UE determines the target RLM resource according to a coverage relationship between the communication resource in the reference beam with the largest received power and the plurality of RLM resources, if an intersection exists between the second communication resource and the CSI-RS resource, the UE determines the communication resource corresponding to the intersection as the target RLM resource; and if the second communication resource does not have intersection with the CSI-RS resource, the UE determines the communication resource which has QCL relation with the second communication resource in the CSI-RS resource as the target RLM resource.

In an embodiment, when the UE measures a target RLM signal carried by a target RLM resource that is periodically sent, the measurement validity of the target RLM resource may be determined according to a threshold, and if an interval between a first radio link monitoring RLM resource and a second RLM resource in a time domain is greater than the threshold, the UE measures the target RLM signal carried by the first RLM resource; the first RLM resource and the second RLM resource are target RLM resources configured by the network side and used for periodically transmitting a target RLM signal, and the second RLM resource is a target RLM resource corresponding to a target RLM signal last measured by the UE.

The process of obtaining the interval between the first RLM resource and the second RLM resource in the time domain and comparing the interval with the threshold by the UE may refer to the embodiment corresponding to fig. 2, which is not described herein again.

In one embodiment, if the interval between the first RLM resource and the second RLM resource in the time domain is not greater than the threshold, the UE ignores the target RLM signal carried in the first RLM resource.

In one embodiment, if the UE is in the discontinuous reception DRX state and the time domain range of the first RLM resource is within the DRX active period of the UE, the UE performs measurement on an RLM signal carried by the first RLM resource.

In one embodiment, the UE determines a frequency domain down-sampling rate according to the signal bandwidth of the target RLM signal and the channel estimation result; the UE measures the target RLM signal using the frequency domain down-sampling rate. The process of determining the frequency domain down-sampling rate by the UE may refer to the embodiment corresponding to fig. 6, which is not described herein again.

In one embodiment, a link monitoring method is provided, as shown in fig. 8, the method includes:

s501, the UE determines a plurality of RLM resources configured by the network side according to the configuration information, wherein the RLM resources comprise SSB resources and CSI-RS resources;

s502, the UE determines communication resources in the reference beam with the maximum receiving power, wherein the communication resources comprise a first communication resource and a second communication resource; then, S503 and S506 are performed;

s503, the UE determines whether the first communication resource is contained in the SSB resource, if so, S504 is executed, and if not, S505 is executed;

s504, the UE determines the first communication resource as a target RLM resource;

s505, the UE determines the communication resource which has quasi-co-location QCL relation with the first communication resource in the SSB resource as a target RLM resource;

s506, the UE determines whether an intersection exists between the second communication resource and the CSI-RS resource; if yes, executing S507, otherwise executing S508;

s507, the UE determines the communication resource corresponding to the intersection as a target RLM resource;

s508, the UE determines the communication resource which has a QCL relationship with the second communication resource in the CSI-RS resource as a target RLM resource;

s509, the UE determines a frequency domain down-sampling rate according to the signal bandwidth of the target RLM signal and a channel estimation result;

s510, the UE determines the interval of the first radio link monitoring RLM resource and the second RLM resource in the time domain;

s511, the UE determines whether the interval in the time domain is larger than a threshold value; if yes, executing S512, otherwise executing S513;

and S512, the UE measures the target RLM signal carried by the first RLM resource by adopting the frequency domain down-sampling rate.

S513, the UE ignores the target RLM signal carried in the first RLM resource.

The above link monitoring method, the implementation principle and the technical effect thereof are referred to the above embodiments, and are not described herein again.

It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.

Based on the same inventive concept, the embodiment of the present application further provides a link monitoring device for implementing the above-mentioned link monitoring method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so specific limitations in one or more embodiments of the link monitoring device provided below may refer to the limitations on the link monitoring method in the foregoing, and details are not described here.

In one embodiment, as shown in fig. 9, there is provided a link monitoring apparatus including:

a measuring module 110, configured to measure, when an interval between a first radio link monitoring RLM resource and a second RLM resource in a time domain is greater than a threshold, an RLM signal carried by the first RLM resource; the first RLM resource and the second RLM resource are communication resources configured by a network side and used for periodically transmitting RLM signals, and the second RLM resource is a communication resource corresponding to the last RLM signal measured by the UE.

In an embodiment, on the basis of the above embodiment, the measurement module 110 is further configured to: and if the interval between the first RLM resource and the second RLM resource in the time domain is not greater than the threshold value, ignoring the RLM signal carried in the first RLM resource.

In an embodiment, on the basis of the above embodiment, the measurement module 110 is further configured to: and if the UE is in a Discontinuous Reception (DRX) state and the time domain range of the first RLM resource is in a DRX active period of the UE, measuring the RLM signal carried by the first RLM resource.

In one embodiment, on the basis of the above embodiments, in the case that the UE is in the DRX state, the threshold value is determined according to the DRX cycle length and the transmission cycle of the RLM signal.

In one embodiment, on the basis of the above embodiments, the threshold value is a first preset threshold value, n1 times DRX _ cycle _ lengthh and n2 times T_RLM,MWherein DRX _ cycle _ length is the DRX cycle length, T_RLM,MThe minimum transmission period of the RLM signal configured for the network side, n1 and n2 are both greater than 1; the first preset threshold is not larger than the reporting time interval of the link state.

In one embodiment, on the basis of the above embodiments, in the case that the UE is in the non-DRX state, the threshold value is determined according to a transmission cycle of an RLM signal.

In one embodiment, on the basis of the above embodiment, the threshold value is a second preset threshold value and n3 times T_RLM,MIs of where T_RLM,MA minimum sending period of the RLM signal configured for the network side; n3 is greater than 1; the second preset threshold is not larger than the reporting time interval of the link state.

In an embodiment, on the basis of the above embodiment, as shown in fig. 10, the apparatus further includes a selecting module 120 configured to: selecting a target RLM resource from a plurality of RLM resources configured on a network side according to the receiving power of the wave beam; and for the RLM signal carried by the target RLM resource, performing the step of measuring the RLM signal carried by the first RLM resource if the time interval between the first radio link monitoring RLM resource and the second RLM resource is greater than a threshold value.

In an embodiment, on the basis of the above embodiment, as shown in fig. 11, the measurement module 110 includes:

a determining unit 111, configured to determine a frequency domain down-sampling rate according to a signal bandwidth of the RLM signal and a channel estimation result;

a measuring unit 112, configured to measure the RLM signals carried by the first RLM resources by using the frequency domain down-sampling rate.

In an embodiment, on the basis of the above embodiment, the channel estimation result includes a channel estimation result of the RLM signal, and/or a channel estimation result of a reference signal associated with the RLM signal presence quasi-co-located QCL.

In an embodiment, on the basis of the foregoing embodiment, the determining unit 111 is specifically configured to: determining a relevant bandwidth corresponding to the RLM signal according to the channel estimation result; the frequency domain correlation between any two frequency points in the related bandwidth is greater than a preset threshold value; and determining the frequency domain down-sampling rate according to the related bandwidth and the signal bandwidth.

In an embodiment, on the basis of the foregoing embodiment, the determining unit 111 is specifically configured to: determining the ratio of the signal bandwidth to the related bandwidth as the number of reference sampling points; and determining the frequency domain down-sampling rate according to the number of the reference sampling points.

In an embodiment, on the basis of the foregoing embodiment, the determining unit 111 is specifically configured to: determining the maximum value of the number of the reference sampling points and the number of preset sampling points as the number of target sampling points; and determining the ratio of the sampling bandwidth to the number of the target sampling points as the frequency domain down-sampling rate.

In one embodiment, as shown in fig. 12, there is provided a link monitoring apparatus including:

a selecting module 210, configured to select a target RLM resource from multiple RLM resources configured on a network side according to the received power of the beam;

a measuring module 220, configured to measure a target RLM signal carried by the target RLM resource.

In an embodiment, on the basis of the foregoing embodiment, the selecting module 210 is specifically configured to: determining the target RLM resource according to the coverage relation between the communication resource corresponding to the reference beam with the maximum received power and the plurality of RLM resources; wherein the reference beams comprise a first beam carrying a synchronization signal SSB and/or a second beam carrying a tracking reference signal TRS.

In an embodiment, on the basis of the above embodiments, the communication resource in the reference beam with the maximum received power includes a first communication resource corresponding to the first beam with the maximum received power, and/or a second communication resource corresponding to at least 4 second beams with the maximum received power.

In an embodiment, on the basis of the foregoing embodiment, the plurality of RLM resources include an SSB resource, where the SSB resource is used to carry an RLM signal of a first type, the RLM signal of the first type is an SSB signal, and the selecting module 210 is specifically configured to: determining the first communication resource as the target RLM resource if the first communication resource is included in the SSB resource; if the first communication resource is not included in the SSB resources, determining a communication resource having a quasi-co-location QCL relationship with the first communication resource in the SSB resources as the target RLM resource.

In an embodiment, on the basis of the foregoing embodiment, the plurality of RLM resources include reference signal CSI-RS resources, the CSI-RS resources are used to carry a second type of RLM signal, the second type of RLM signal is a CSI-RS signal, and the selecting module 210 is specifically configured to: if the second communication resource and the CSI-RS resource have an intersection, determining the communication resource corresponding to the intersection as a target RLM resource; if the second communication resource does not intersect with the CSI-RS resource, determining a communication resource in the CSI-RS resource, which has a QCL relationship with the second communication resource, as the target RLM resource.

In an embodiment, based on the foregoing embodiments, the measurement module 220 is specifically configured to: if the interval between the first radio link monitoring RLM resource and the second RLM resource in the time domain is larger than a threshold value, the target RLM signal carried by the first RLM resource is measured; the first RLM resource and the second RLM resource are target RLM resources configured by a network side and used for periodically transmitting the target RLM signal, and the second RLM resource is a target RLM resource corresponding to the target RLM signal last measured by the UE.

In one embodiment, based on the above embodiments, the measurement module 220 is further configured to: and if the interval between the first RLM resource and the second RLM resource in the time domain is not greater than the threshold value, ignoring a target RLM signal carried in the first RLM resource.

In one embodiment, based on the above embodiments, the measurement module 220 is further configured to: and if the UE is in a Discontinuous Reception (DRX) state and the time domain range of the first RLM resource is in a DRX activation period of the UE, measuring the RLM signal carried by the first RLM resource.

In an embodiment, based on the above embodiments, the measurement module 220 is specifically configured to: determining a frequency domain down-sampling rate according to the signal bandwidth of the target RLM signal and a channel estimation result; and measuring the target RLM signal by adopting the frequency domain down-sampling rate.

For the above link monitoring device, the implementation principle and technical effect thereof are referred to the above method embodiments, and are not described herein again.

The modules in the link monitoring device can be implemented in whole or in part by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a user equipment is provided, the internal structure of which may be as shown in fig. 13. The user equipment includes a processor, a memory, an input/output interface, a communication interface, a display unit, and an input device. The processor, the memory and the input/output interface are connected by a system bus, and the communication interface, the display unit and the input device are connected by the input/output interface to the system bus. Wherein the processor of the user equipment is configured to provide computing and control capabilities. The memory of the user equipment comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The input/output interface of the user device is used for exchanging information between the processor and an external device. The communication interface of the user equipment is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a link monitoring method. The display unit of the user equipment is used for forming a visual picture and can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the user equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on a shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.

Those skilled in the art will appreciate that the structure shown in fig. 13 is a block diagram of only a portion of the structure relevant to the present application, and does not constitute a limitation on the user equipment to which the present application applies, and that a particular user equipment may include more or less components than those shown in the figure, or combine certain components, or have a different arrangement of components.

The embodiment of the application also provides a computer readable storage medium. One or more non-transitory computer-readable storage media containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the steps of the link monitoring method.

Embodiments of the present application also provide a computer program product containing instructions that, when run on a computer, cause the computer to perform a link monitoring method.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), Magnetic Random Access Memory (MRAM), Ferroelectric Random Access Memory (FRAM), Phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases referred to in various embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A method of link monitoring, the method comprising:

if the time interval between the first radio link monitoring RLM resource and the second RLM resource is larger than a threshold value, the user equipment UE measures the RLM signal carried by the first RLM resource;

the first RLM resource and the second RLM resource are communication resources configured by a network side and used for periodically transmitting RLM signals, and the second RLM resource is a communication resource corresponding to the last RLM signal measured by the UE.

2. The method of claim 1, further comprising:

and if the interval between the first RLM resource and the second RLM resource in the time domain is not greater than the threshold value, the UE ignores the RLM signal carried in the first RLM resource.

3. The method of claim 1, wherein the measuring, by the UE, the RLM signals carried by the first RLM resource comprises:

and if the UE is in a Discontinuous Reception (DRX) state and the time domain range of the first RLM resource is in a DRX activation period of the UE, the UE measures the RLM signal carried by the first RLM resource.

4. The method according to any of claims 1-3, wherein the threshold value is determined based on the DRX cycle length and the transmission cycle of the RLM signal, in case the UE is in DRX state.

5. The method of claim 4, wherein the threshold values are a first preset threshold value, n1 times DRX _ cycle _ length, and n2 times T_RLM,MWherein DRX _ cycle _ length is the DRX cycle length, T_RLM,MThe minimum transmission period of the RLM signal configured for the network side, n1 and n2 are both greater than 1; the first preset threshold is not larger than the reporting time interval of the link state.

6. The method according to claim 1 or 2, wherein the threshold value is determined according to the transmission period of the RLM signal in case the UE is in the non-DRX state.

7. The method of claim 6Method, characterized in that the threshold value is a second preset threshold value and n3 times T_RLM,MIs of where T_RLM,MA minimum sending period of the RLM signal configured for the network side; n3 is greater than 1; the second preset threshold is not larger than the reporting time interval of the link state.

8. The method according to any one of claims 1-3, further comprising:

and for the RLM signal carried by the target RLM resource, performing the step of measuring the RLM signal carried by the first RLM resource if the time interval between the first radio link monitoring RLM resource and the second RLM resource is greater than a threshold value.

9. The method according to any of claims 1-3, wherein the measuring RLM signals carried by the first RLM resource comprises:

determining a frequency domain down-sampling rate according to the signal bandwidth of the RLM signal and a channel estimation result;

and measuring the RLM signals carried by the first RLM resources by adopting the frequency domain down-sampling rate.

10. The method according to claim 9, wherein the channel estimation results comprise channel estimation results for the RLM signal and/or channel estimation results for reference signals associated with quasi co-located QCLs for the RLM signal.

11. The method of claim 10, wherein determining the frequency domain down-sampling rate according to the channel estimation result and the signal bandwidth of the RLM signal comprises:

the UE determines the related bandwidth corresponding to the RLM signal according to the channel estimation result; the frequency domain correlation between any two frequency points in the related bandwidth is greater than a preset threshold value;

and determining the frequency domain down-sampling rate according to the related bandwidth and the signal bandwidth.

12. The method of claim 11, wherein determining the frequency domain down-sampling rate based on the correlation bandwidth and the signal bandwidth comprises:

determining the ratio of the signal bandwidth to the related bandwidth as the number of reference sampling points;

and determining the frequency domain down-sampling rate according to the number of the reference sampling points.

13. The method of claim 12, wherein determining the frequency domain down-sampling rate based on the number of reference samples comprises:

determining the maximum value of the number of the reference sampling points and the number of preset sampling points as the number of target sampling points;

and determining the ratio of the sampling bandwidth to the number of the target sampling points as the frequency domain down-sampling rate.

14. A method of link monitoring, the method further comprising:

and the UE measures the target RLM signals carried by the target RLM resources.

15. The method of claim 14, wherein the UE selects a target RLM resource from a plurality of RLM resources configured on the network side according to the received power of the beam, comprising:

the UE determines the target RLM resource according to the coverage relation between the communication resource corresponding to the reference beam with the maximum receiving power and the plurality of RLM resources; wherein the reference beams comprise a first beam carrying a synchronization signal SSB and/or a second beam carrying a tracking reference signal TRS.

16. The method according to claim 15, wherein the communication resource in the reference beam with the largest received power comprises a first communication resource corresponding to the first beam with the largest received power and/or a second communication resource corresponding to at least 4 second beams with the largest received power.

17. The method of claim 16, wherein the plurality of RLM resources comprise SSB resources, wherein the SSB resources are configured to carry a first type of RLM signals, wherein the first type of RLM signals are SSB signals, and wherein the UE determines the target RLM resource according to a coverage relation between a communication resource in a reference beam with a largest received power and the plurality of RLM resources, comprising:

determining, by the UE, the first communication resource to be the target RLM resource if the first communication resource is included in the SSB resources;

if the first communication resource is not included in the SSB resources, the UE determines a communication resource which has a quasi-co-location QCL relationship with the first communication resource in the SSB resources as the target RLM resource.

18. The method of claim 16, wherein the plurality of RLM resources comprise reference signal CSI-RS resources, wherein the CSI-RS resources are configured to carry a second type of RLM signals, wherein the second type of RLM signals are CSI-RS signals, and wherein the UE determines the target RLM resource according to a coverage relation between a communication resource in a reference beam with a maximum received power and the plurality of RLM resources, and comprises:

if the second communication resource and the CSI-RS resource have an intersection, the UE determines the communication resource corresponding to the intersection as a target RLM resource;

if the second communication resource does not intersect with the CSI-RS resource, the UE determines a communication resource, which has a QCL relationship with the second communication resource, in the CSI-RS resource as the target RLM resource.

19. The method of any of claims 14-18, wherein the UE making measurements on a target RLM signal carried by the target RLM resource comprises:

if the interval of the first radio link monitoring RLM resource and the second RLM resource in the time domain is larger than a threshold value, the UE measures a target RLM signal carried by the first RLM resource;

the first RLM resource and the second RLM resource are target RLM resources configured by a network side and used for periodically transmitting the target RLM signal, and the second RLM resource is a target RLM resource corresponding to the target RLM signal last measured by the UE.

20. The method of claim 19, further comprising:

and if the interval between the first RLM resource and the second RLM resource in the time domain is not larger than the threshold value, the UE ignores the target RLM signal carried in the first RLM resource.

21. The method of claim 19, wherein the measuring the target RLM signal carried by the first RLM resource comprises:

22. The method of any of claims 14-18, wherein the UE making measurements on a target RLM signal carried by the target RLM resource comprises:

the UE determines a frequency domain down-sampling rate according to the signal bandwidth of the target RLM signal and a channel estimation result;

and the UE measures the target RLM signal by adopting the frequency domain down-sampling rate.

23. A link monitoring device, comprising:

24. A link monitoring device, comprising:

and the measuring module is used for measuring the target RLM signal carried by the target RLM resource.

25. A user equipment comprising a memory and a processor, the memory having stored thereon a computer program, wherein the computer program, when executed by the processor, causes the processor to perform the steps of the link monitoring method according to any one of claims 1 to 22.

26. 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 according to any one of claims 1 to 22.

27. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the method of any one of claims 1 to 22 when executed by a processor.