CN114793343A - Method and device for monitoring wireless link - Google Patents

Abstract

A method and device for monitoring a wireless link are provided, the method comprising: determining an average value of multiple signal quality measurement values of a target resource in a current reporting period, where the multiple signal quality measurement values are within a preset duration; A comparison of the average value with a preset threshold evaluates the wireless link. In the embodiments of the present application, the reliability of wireless link monitoring can be improved.

Description

Method and device for wireless link monitoring

technical field

The present application relates to the field of communications, and more particularly, to a method and apparatus for monitoring a wireless link.

Background technique

In some communication systems, a network device may configure one or more RLM resources (for example, a reference signal (RS)) for a radio link monitor (RLM), and a terminal device may Signal quality is measured and the wireless link is evaluated based on the measurements. However, at present, the reliability of wireless link monitoring is not high.

SUMMARY OF THE INVENTION

The present application provides a wireless link monitoring method and device, which can improve the reliability of wireless link monitoring.

In a first aspect, a method for monitoring a wireless link is provided, comprising: determining an average value of multiple signal quality measurement values of a target resource in a current reporting period, where the multiple signal quality measurement values are within a preset duration; The wireless link is evaluated by comparing the average value with a preset threshold.

In a second aspect, an apparatus for monitoring a wireless link is provided, including: a determining unit configured to determine an average value of multiple signal quality measurement values of a target resource in a current reporting period, where the multiple signal quality measurement values are located in a preset within the time period; an evaluation unit, configured to evaluate the wireless link according to the comparison result between the average value and the preset threshold.

In a third aspect, an apparatus for monitoring a wireless link is provided, including a memory, a transceiver and a processor, where the memory is used for storing a program, the transceiver is used for receiving and transmitting wireless signals, and the processor is used for calling the A program in a memory to perform the method of the first aspect.

In a fourth aspect, a chip is provided, including a processor for calling a program from a memory, so that a device on which the chip is installed executes the method described in the first aspect.

A fifth aspect provides a computer-readable storage medium having a program stored thereon, the program causing a computer to execute the method of the first aspect.

In a sixth aspect, a computer program product is provided, comprising a program, the program causing a computer to perform the method of the first aspect.

In a seventh aspect, a computer program is provided, the computer program causes a computer to perform the method of the first aspect.

In the method in this embodiment of the present application, the average value of multiple signal quality measurement values of the target resource is determined in the current reporting period, and the historical information can be fully utilized to accurately track the wireless channel without configuring the forgetting factor. The comparison result of the value and the preset threshold evaluates the wireless link, which can improve the reliability of wireless link monitoring.

Description of drawings

FIG. 1 is an example diagram of a wireless communication system to which an embodiment of the present application is applied.

FIG. 2 is a schematic flowchart of a method for monitoring a wireless link in an embodiment of the present application.

FIG. 3 is a schematic diagram of MI storage of CSI-RS resources in an embodiment of the present application.

FIG. 4 is a schematic flowchart of a method for monitoring a wireless link in an embodiment of the present application.

FIG. 5 is a schematic structural diagram of an apparatus for monitoring a wireless link in an embodiment of the present application.

FIG. 6 is a schematic structural diagram of an apparatus in an embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a wireless communication system 100 to which an embodiment of the present application is applied. The wireless communication system 100 may include a network device 110 and a user equipment (user equipment, UE) 120 . The network device 110 may communicate with the UE 120 . The network device 110 may provide communication coverage for a particular geographic area and may communicate with UEs 120 located within the coverage area. The UE 120 may access a network (eg, a wireless network) through the network device 110 .

FIG. 1 exemplarily shows one network device and two UEs. Optionally, the wireless communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. This application The embodiment does not limit this. Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.

It should be understood that the technical solutions in the embodiments of the present application can be applied to various communication systems, for example, a fourth generation (4th generation, 4G) system, a fifth generation (5th generation, 5G) system or a new radio (new radio, NR), Long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) and the like. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth-generation mobile communication system, or satellite communication system, and so on.

The UE in the embodiments of the present application may also be referred to as terminal equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), remote station, remote terminal , mobile device, user terminal, terminal, wireless communication device, user agent or user equipment. The UE in this embodiment of the present application may be a device that provides voice and/or data connectivity to a user, and may be used to connect people, objects, and machines, such as a handheld device with a wireless connection function, a vehicle-mounted device, and the like. The UE in the embodiments of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a notebook computer, a handheld computer, a mobile internet device (mobile internet device, MID), a wearable device, a virtual reality (virtual reality, VR) ) equipment, augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, smart grids A wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like. Optionally, the UE may be used to act as a base station. For example, a UE may act as a scheduling entity that provides sidelink signals between UEs in V2X or D2D or the like. For example, cell phones and automobiles communicate with each other using sidelink signals. Communication between cellular phones and smart home devices without relaying communication signals through base stations.

The network device in this embodiment of the present application may be a device for communicating with a UE, and the network device may also be referred to as an access network device or a radio access network device, for example, the network device may be a base station. The network device in this embodiment of the present application may refer to a radio access network (radio access network, RAN) node (or device) that accesses the UE to the wireless network. The base station can broadly cover the following names, or be replaced with the following names, such as: Node B (NodeB), evolved NodeB (eNB), next generation NodeB (gNB), relay station, Access point, transmitting and receiving point (TRP), transmitting point (TP), primary station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node , wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (active antenna unit) , AAU), radio head (remote radio head, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning node and so on. A base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof.

In some embodiments, network devices may be stationary or mobile. For example, a helicopter or drone may be configured to act as a mobile network device, and one or more cells may move according to the location of the mobile network device. In other examples, a helicopter or drone may be configured to function as a device that communicates with another network device. In some embodiments, the network device may refer to a CU or a DU, or the network device may include a CU and a DU, or the network device may further include an AAU.

It should be understood that the network equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water; and it can also be deployed on aircraft, balloons and satellites in the air. In the embodiments of the present application, the network devices and the scenarios in which the embodiments of the present application are located are not limited.

It should also be understood that all or part of the functions of the network device and the UE in this application may also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (eg, a cloud platform).

The RLM function in the wireless communication system means that the UE monitors (or tracks) the downlink channel quality of the serving cell, so as to determine the in-sync (IS) status or out-of-sync (OOS) status of the radio link. )state.

In some communication systems, the network device may configure one or more RLM resources (eg, RS) for the RLM to measure the channel quality, and the terminal device may measure the signal quality on the RLM resources and evaluate the radio link based on the measurement results. road. For example, in the 4G system, a cell-specific reference signal (CRS) can be used for measurement, and in the 5G system, RLM resources (also referred to as measurement resources, RS resources, or RLM-RS resources, etc.) can be configured through high-layer signaling. The number of resources can be 1 to 8, and the resource types can include: synchronization signal blocks (synchronization signal block, SSB) (such as periodic SSB only), channel state information reference signal (channel state information reference signal, CSI-RS) (such as periodic CSI-RS) only) or both types have (both) three. Table 1 shows an example of an RLM resource configuration.

Table 1 Maximum number of RLM resources N _RLM

carrier frequency range N_RLM FR1≤3GHz 2 FR1>3GHz 4 FR2 8

The carrier frequency range (carrier frequency range) refers to the carrier frequency range of the primary cell (PCell) or primary secondary cell (PSCell), FR1 refers to frequency range 1 (frequency range 1), and FR2 refers to the frequency range 2(frequency range 2).

When evaluating the channel quality, the UE will evaluate the signal quality on the RLM resources in the past evaluation period (evaluation period) in each reporting period (indication period). If all the signal quality is lower than Qout, the UE is in layer 1 (L1 layer) An OOS indication will be sent to layer 3 (L3 layer); if a certain RS signal quality is higher than Qin, the UE will send an IS indication to the L3 layer at the L1 layer. Among them, Qin and Qout respectively represent the channel quality threshold corresponding to block error rate (BLER)=2% or BLER=10% under the assumed physical downlink control channel (PDCCH) transmission conditions. The period and evaluation are also defined in the communication protocols 38133 and 36133, and will not be repeated here.

One approach to assessing signal quality includes the following steps:

(1) According to the reference signal configuration, calculate the wideband signal-to-noise ratio (signal-to-noiseratio, SNR) value snr _t-1 or mutual information (mutual Information, MI) value mi _t-1 , t of the reference signal at time t-1 is an integer;

(2) The first-order infinite impulse response filter (IIR) is adopted, the forgetting factor α is configured, and the measurement result snr _t at time t can be obtained by the following formula;

snr _t =(1-α)*snr _t-1 +α*snr _t or mi _t =(1-α)*mit _-1 +α*mit _t

(3) Compare snr _t or mi _t with Qout and Qin at the reporting time, and make a final judgment.

Among them, the thresholds of Qout and Qin can be analyzed by analyzing the recent characteristics of the channel, such as delay spread or Doppler spread and other pre-stored matching thresholds.

However, the forgetting factor is not easy to determine, which will lead to the inability to accurately track the changes of the signal. For example, when the channel changes drastically, if the forgetting factor value is too small, the change of the channel cannot be tracked; if the forgetting factor value is too large, the past information cannot be fully utilized, and the current channel state cannot be accurately reported. . Especially in the 5G system, the periodic density of the periodic signals CSIRS and SSB used for RLM may be much lower than that of the CRS signal in LTE, the sample interval is long, and the forgetting factor is not easy to set. It can be seen from the above analysis that the reliability of wireless link monitoring is not high at present.

In order to solve one or more of the above technical problems, the present application proposes a method and device for wireless link monitoring, which can make full use of historical information to accurately track wireless channels without configuring forgetting factors, thereby improving wireless link monitoring. reliability.

The embodiments of the present application will be described in detail below with reference to FIG. 2 to FIG. 6 .

FIG. 2 is a schematic flowchart of a method for monitoring a wireless link according to an embodiment of the present application. The method 200 in FIG. 2 may be performed by the UE 120 in FIG. 1 , or may also be performed by a chip, apparatus or module in the UE 120 . The method 200 shown in FIG. 2 may include steps S210 and S220, as follows:

S210: Determine an average value of multiple signal quality measurement values of the target resource in the current reporting period, where the multiple signal quality measurement values are within a preset duration.

The target resource may refer to an RLM resource configured by a network device. Optionally, the target resource may be a reference signal (reference signal, RS). Optionally, as shown in the aforementioned Table 1, the target resource may include multiple resources. For example, the target resource may include at least one of CRS, SSB, CSI-RS and other signals.

The reporting period may be predefined in the communication protocol, or may also be configured by the network device. Optionally, the reporting period may be determined according to the state of the terminal device; or, when the terminal device is in different states, the corresponding RLM reporting periods may be different. Wherein, the state of the terminal device may include a discontinuous reception (discontinuous reception, DRX) state and a non-discontinuous reception (non discontinuous reception, nonDRX) state. For example, when the terminal equipment is in the DRX state, the reporting period of the RLM corresponding to the terminal equipment may be 20ms; when the terminal equipment is in the nonDRX state, the reporting period of the RLM corresponding to the terminal equipment may be 10ms.

The preset duration may also be predefined in a communication protocol, or may also be configured by a network device. Optionally, the preset duration may be the evaluation period of the target resource. The evaluation cycle may include an IS evaluation cycle or an OOS evaluation cycle. For example, the preset duration may be the IS evaluation period or the OOS evaluation period corresponding to the current reporting period.

Optionally, the preset duration may be determined according to the state of the terminal device; or, when the terminal device is in different states, the corresponding preset duration may be different. For example, when the terminal device is in the DRX state, the IS evaluation cycle of the RLM corresponding to the terminal device may be 200ms; when the terminal device is in the non-DRX state, the IS evaluation cycle of the RLM corresponding to the terminal device may be 100ms.

The preset duration may include multiple reporting periods, and the current reporting period may be one of the multiple reporting periods included in the preset duration. For example, the reporting period may be 10 milliseconds (ms), and the preset duration may be 200 ms. In this case, the preset duration includes 20 reporting periods.

Optionally, multiple signal quality measurements may be included within the preset time period. The signal quality measurement value may be a wideband signal-to-noise ratio (signal-to-noise ratio, SNR) value or a mutual information (mutual Information, MI) value of the signal on the target resource.

For example, the reporting period may be 10ms, and the preset duration may be 200ms. Assuming that the target resource is measured once in each reporting period, the target resource has a total of 20 SNR values or MI values within the preset duration.

Optionally, multiple reporting periods may be in one-to-one correspondence with multiple storage spaces. Optionally, the storage space may be the storage space in the terminal device. For example, the storage space may be the storage space in the UE 120 shown in FIG. 1 .

Optionally, the storage space may be a buffer. Using cache can effectively improve storage efficiency.

Wherein, each of the multiple storage spaces may store one or more signal quality measurement values within its corresponding reporting period. For example, if the period of the target resource is 4ms, and two measurements are made in the current reporting period, the two signal quality measurement values can be stored in the storage space corresponding to the current reporting period.

Further, each of the plurality of storage spaces may store the accumulated value of one or more signal quality measurement values in its corresponding reporting period. For example, if the target resource is measured twice in the current reporting period, the signal quality measurement values obtained from the two measurements can be added together, and the two measured values (obtained after the addition) can be stored in the storage space corresponding to the current reporting period. Sum of signal quality measurements. In this way, only the sum of the signal quality measurement values in the reporting period needs to be stored, and it is not necessary to store all the signal quality measurement values, which helps to reduce the storage space occupied, thereby improving storage efficiency.

Optionally, each of the multiple storage spaces may further store the number of signal quality measurement values in the corresponding reporting period. For example, if the target resource is measured twice in the current reporting period, the storage space corresponding to the current reporting period can store the number of times the target resource is measured twice in the current reporting period.

Optionally, each of the multiple storage spaces may further store time tags of one or more signal quality measurement values in the corresponding reporting period. Optionally, the time stamp may indicate the moment or time period at which the target resource was measured. In this way, according to the time tag of each signal quality measurement value, multiple signal quality measurement values of the target resource within a preset time period can be determined, so as to evaluate the wireless link based on the multiple signal quality measurement values.

Optionally, the plurality of storage spaces may be cyclic storage spaces, and the signal quality measurement values are stored on a first-in, first-out basis. That is, when multiple storage spaces are full, the oldest stored data can be cleared or overwritten. For example, assuming that the number of storage spaces is 20, after storing the signal quality measurement values for 20 reporting periods, all storage spaces have stored data (signal quality measurement values). Periodic signal quality value, you can clear the signal quality measurement value of the earliest stored reporting period (for example, the signal quality measurement value of the first reporting period), or you can use the latest data to directly overwrite the earliest stored signal of the reporting period quality measurement.

S220: Evaluate the wireless link according to the comparison result of the average value and a preset threshold.

Optionally, the preset threshold may include a synchronization threshold and an out-of-synchronization threshold. For example, the synchronization threshold may be Qin, and the out-of-sync threshold may be Qout. Optionally, Qin and Qout may be predefined by a communication protocol or configured by a network device.

For example, Qin may represent the channel quality threshold corresponding to BLER=2% or BLER=10% under the assumed PDCCH transmission condition; Qout may represent the corresponding channel quality threshold under the assumed PDCCH transmission condition, BLER=2% or BLER=10% Channel quality threshold.

Optionally, when evaluating the wireless link according to the comparison result of the average value and the preset threshold, if the average value is greater than the synchronization threshold, it can be determined that the wireless link is in a synchronized state; if the average value is less than The out-of-synchronization threshold, it can be determined that the wireless link is in an out-of-synchronization state.

For example, if the average value is greater than Qin, the radio link is in a synchronized state in the current reporting period, and the UE can send an IS indication to the L3 layer at the L1 layer. Alternatively, the IS indication may also be sent from the L1 layer to the L3 layer when the wireless link is in a synchronized state in multiple consecutive reporting periods.

For example, if the average value is less than Qout, the radio link is in an out-of-synchronization state in the current reporting period, and the UE may send an OOS indication to the L3 layer at the L1 layer. Alternatively, the OOS indication may also be sent from the L1 layer to the L3 layer when the wireless link is in an out-of-synchronization state for multiple consecutive reporting periods.

In the method in this embodiment of the present application, the average value of multiple signal quality measurement values of the target resource is determined in the current reporting period, and the historical information can be fully utilized to accurately track the wireless channel without configuring the forgetting factor. The comparison result of the value and the preset threshold evaluates the wireless link, which can improve the reliability of wireless link monitoring.

FIG. 4 is a schematic flowchart of a method for monitoring a wireless link according to an embodiment of the present application. The method 400 shown in FIG. 4 may include steps S410 and S420, as follows:

S410, pre-design the cache used by the RLM.

The size of the total cache can be determined by:

的最大值)*最大RLM资源数Ceil(

max) * max number of RLM resources

Among them, Ceil() means to return the smallest integer greater than or equal to "()", T _{Evaluate_Qout} means the OOS evaluation period defined by the communication protocol, T _{Indication_period} means the reporting period defined by the communication protocol, and the maximum value of (evaluation period/reporting period) refers to The maximum value of the two ratios of the terminal device in various scenarios is taken as the total buffer size.

For example, if the size of the total buffer is 40, it means that the total buffer includes 40 buffers, and the 40 buffers can respectively store the sum of all measurement MIs, the number of measured samples and the Time stamp of the last measurement. For example, the buffer may be represented as [MI _{indication_sum} , M, Time], where MI _{indication_sum} is the sum of all measurement MIs, M is the number of samples measured, and Time is the time label of the last measurement.

For example, for LTE, the total buffer size may be 40, for FR1, the total buffer size may be 60*4, and for FR2, the total buffer size may be 480*8. The size of the total cache corresponding to each RLM resource type is shown in Table 2 below.

Table 2 The size of the total cache corresponding to each RLM resource type

S420: Determine RLM resource information according to the RRC configuration information.

Optionally, the RLM resource information of the UE may be obtained according to radio resource control (radio resource control, RRC) configuration information, so as to obtain the period and offset (offset) of the RLM resource. For example, the number of RLM resources can be determined through the aforementioned Table 1.

For example, assuming that the number of resources is X, the resource index can be expressed as n _i , 1≤i≤X, and the period length of the resource can be expressed as T _i , 1≤i≤X. , where n _i , i and X are all integers, and T _i is a real number.

S430: Calculate the reporting period of the RLM of the UE.

Optionally, the reporting period T _{Indication_period} of the RLM of the UE may be calculated in real time according to the state of the UE.

When the UE is in the DRX state,

T _{Indication_period} =Max(10ms,1.5*DRX_cycle_length,1.5*T _RLM,M );

When the UE is in a non-DRX (no DRX or non DRX) state,

T _{Indication_period} =Max(10ms,T _RLM,M )

Wherein, DRX_cycle_length represents the length of the DRX cycle, and T _RLM,M represents the shortest cycle of the RLM resource.

S440, the evaluation period of the RLM of the resource index n _i is calculated.

和

表示资源索引n_i的OOS评估周期，

表示资源索引n_i的IS评估周期。computing resource index n _i

and

represents the OOS evaluation period of resource index n _i ,

Indicates the IS evaluation period for resource index n _i .

For example, the OOS evaluation period and IS evaluation period of the SSB and CSI-RS specified in the communication protocol are shown in Tables 3 to 6 below.

Table 3 OOS evaluation cycle and IS evaluation cycle of SSB corresponding to FR1

Among them, T _{Evaluate_out_SSB} represents the OOS evaluation period of the SSB, T _{Evaluate_in_SSB} represents the IS evaluation period of the SSB, T _SSB represents the RLM period of the SSB, T _DRX represents the DRX cycle length, and P represents the adjustment factor (for example, the adjustment factor can be related to the MRTG of the SSB. (Measurement GAP) period and/or SMTC (SSB Measurement Time Configuration) period is relevant).

Table 4 OOS evaluation period and IS evaluation period of CSI-RS corresponding to FR1

Among them, T _{Evaluate_out_CSI-RS} represents the OOS evaluation cycle of CSI-RS, T _{Evaluate_in_CSI-RS} represents the IS evaluation cycle of CSI-RS, T _CSI-RS represents the RLM cycle of CSI-RS, T _DRX represents the length of the DRX cycle, and P represents the adjustment factor (for example, the adjustment factor may be related to the MRTG (measurement GAP) period and/or SMTC (SSB measurement time configuration) period of the SSB), M _out represents the adjustment factor (for example, the recommended value of M _out may be 20), M _in represents an adjustment factor (for example, the recommended value of M _in can be 10).

Table 5 OOS evaluation cycle and IS evaluation cycle of SSB corresponding to FR2

Among them, T _{Evaluate_out_SSB} represents the OOS evaluation period of the SSB, T _{Evaluate_in_SSB} represents the IS evaluation period of the SSB, T _SSB represents the RLM period of the SSB, T _DRX represents the DRX cycle length, and P represents the adjustment factor (for example, the adjustment factor can be related to the MRTG of the SSB. (Measurement GAP) cycle and/or SMTC (SSB measurement time configuration) cycle), N represents an adjustment factor (the recommended value corresponding to SSB may be 8, and the recommended value corresponding to CSR-RS may be 1).

Table 6 OOS evaluation period and IS evaluation period of CSI-RS corresponding to FR2

Among them, T _{Evaluate_out_CSI-RS} represents the OOS evaluation cycle of CSI-RS, T _{Evaluate_in_CSI-RS} represents the IS evaluation cycle of CSI-RS, T _CSI-RS represents the RLM cycle of CSI-RS, T _DRX represents the length of the DRX cycle, and P represents the adjustment factor (for example, the adjustment factor may be related to the MRTG (measurement GAP) period and/or the SMTC (SSB measurement time configuration) period of the SSB), N represents the adjustment factor (the recommended value corresponding to SSB may be 8, and the corresponding value of CSR-RS The recommended value of M out may be 1), M _out represents the adjustment factor (for example, the recommended value of M _out may be 20), and M _in represents the adjustment factor (for example, the recommended value of M _in may be 10).

The detailed description of the above-mentioned adjustment factors may refer to the definition in the communication protocol 38133, which will not be repeated here.

S450, calculate the MI value of the RLM resource of the resource index n _i .

Optionally, the channel estimate H of the measurement resource index n _i and the noise covariance matrix R thereof can be obtained, and the MI value MI _m of the measurement resource is calculated. The specific steps can be as follows:

的维度为(接收天线RX*端口数P*资源单元(resource element，RE)样点数K)。

表示第k个参考RE位置上的信道估计矩阵。(1) Whitening process R _nsample =L*L ^H , obtain the estimation after whitening

The dimension of is (receiving antenna RX*port number P*resource element (resource element, RE) sample number K).

represents the channel estimation matrix at the kth reference RE position.

求全带宽SNR值。(2) Channel estimation matrix after whitening

Find the full bandwidth SNR value.

(3) Map the SNR to the MI value MI _m .

For a specific implementation process, reference may be made to the prior art, which will not be repeated here.

S460: Accumulate all MI values in the reporting period corresponding to the resource index n _i .

Accumulate all MI values of the measurement resource index n _i within a reporting period to obtain the sum of all MI values MI _{indication_sum} , and record the number of samples (or measurement times) M _{indication_sum} within the reporting period, and finally obtain within the reporting period The sum of all MI values is stored in the buffer corresponding to the reporting period.

where m is an integer.

Through this accumulation, it is not necessary to store the data of multiple samples in one reporting period during the implementation process, and only the sum is stored in the current cache, which can effectively save storage space.

Optionally, the above-mentioned processing may be performed on the MI value in each reporting period, and stored in its corresponding cache until the total cache becomes full. After the MI value corresponding to 40 reporting periods, the total cache becomes full.

Optionally, the cache can be a circular cache, that is, a first-in, first-out principle can be maintained. That is, when multiple storage spaces are full, the oldest stored data can be cleared or overwritten.

Since the state of the UE may be continuously switched between the DRX and nonDRX states, for the same resource (eg, n _i ), the size of the reporting period and the evaluation period corresponding to the resource will also change. At the same time, the number of samples in each cache is not necessarily the same.

As the state of the UE keeps switching between the DRX state and the nonDRX state, the size of the reporting period and the evaluation period will be constantly adjusted. By recording the time tags of the samples in the cache, the selection of evaluation resources can be effectively performed.

S470: Calculate the average value of MI in one evaluation period corresponding to the resource index n _i .

Optionally, at the reporting moment (eg, the last moment of the reporting period), the time stamps of the samples in the buffer may be used to determine those historical values in the total buffer that need to be used to calculate the MI average through the IS evaluation period, the OOS evaluation period, and the time stamp of the samples in the buffer.

和

可以通过下式计算。For example, calculating the MI mean

and

It can be calculated by the following formula.

Wherein, M _{indication_sum} represents the total number of samples in the evaluation period.

For example, as shown in FIG. 3 , a CSI-RS period is 4 ms, a reporting period is 10 ms, and there are 2 CSI-RS samples in each reporting period as an example for description. It can be seen from Figure 3 that the MI sum of the two samples in each reporting period is stored in its corresponding buffer. The number of caches corresponding to the IS evaluation cycle is 10, and the number of caches corresponding to the OOS evaluation cycle is 20.

S480, using the MI average value and the threshold value to make a decision.

和

分别与Qin和Qout做比较，进行最终的判决。Optionally, all resources can be

and

Compare with Qin and Qout respectively to make a final judgment.

In the method in the embodiment of the present application, by designing an effective storage method, all historical information can be quickly used at the reporting time, and the channel can be tracked stably, thereby avoiding the problem caused by the filtering method.

The method embodiments of the present application are described in detail above with reference to FIGS. 1 to 4 , and the apparatus embodiments of the present application are described in detail below with reference to FIGS. 5 and 6 . It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments. Therefore, for the parts not described in detail, reference may be made to the foregoing method embodiments.

FIG. 5 is a schematic structural diagram of an apparatus for monitoring a wireless link provided by an embodiment of the present application. As shown in FIG. 5 , the apparatus 500 includes a determination unit 510 and an evaluation unit 520, and the details are as follows:

a determining unit 510, configured to determine an average value of multiple signal quality measurement values of the target resource in the current reporting period, where the multiple signal quality measurement values are within a preset duration;

The evaluating unit 520 is configured to evaluate the wireless link according to the comparison result between the average value and the preset threshold.

Optionally, the preset duration is a synchronous IS evaluation period or an out-of-synchronization OOS evaluation period corresponding to the current reporting period.

Optionally, the signal quality measurement value is a signal-to-noise ratio value or a mutual information value.

Optionally, the preset duration includes multiple reporting periods, the current reporting period is one of the multiple reporting periods, and the multiple reporting periods are in one-to-one correspondence with multiple storage spaces. Each of the storage spaces stores one or more signal quality measurement values in its corresponding reporting period.

Optionally, each of the plurality of storage spaces stores the accumulated value of one or more signal quality measurement values in its corresponding reporting period and the number of the signal quality measurement values.

Optionally, each of the plurality of storage spaces further stores time labels of one or more signal quality measurement values in the corresponding reporting period.

Optionally, the plurality of storage spaces store the signal quality measurement values on a first-in, first-out basis.

Optionally, the storage space is a cache of the apparatus 500 .

Optionally, the preset threshold includes a synchronization threshold and an out-of-synchronization threshold; wherein, the evaluating unit 520 is specifically configured to: if the average value is greater than the synchronization threshold, determine that the wireless link is in a synchronized state; If the average value is less than the out-of-synchronization threshold, it is determined that the wireless link is in an out-of-synchronization state.

Optionally, the reporting period and the preset duration are determined according to a state of the apparatus 500, and the state of the apparatus 500 includes a discontinuous reception state and a continuous reception state.

FIG. 6 is a schematic structural diagram of an apparatus provided by an embodiment of the present application. The dashed line in Figure 6 indicates that the unit or module is optional. The apparatus 600 can be used to implement the methods described in the above method embodiments. The apparatus 600 may be a chip or a wireless link monitoring apparatus.

Apparatus 600 may include one or more processors 610 . The processor 610 can support the apparatus 600 to implement the methods described in the foregoing method embodiments. The processor 610 may be a general purpose processor or a special purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The apparatus 600 may also include one or more memories 620 . A program is stored in the memory 620, and the program can be executed by the processor 610, so that the processor 610 executes the methods described in the foregoing method embodiments. The memory 620 may be independent of the processor 610 or may be integrated in the processor 610 .

The apparatus 600 may also include a transceiver 630 . The processor 610 may communicate with other devices or chips through the transceiver 630 . For example, the processor 610 can send and receive data with other devices or chips through the transceiver 630 .

Embodiments of the present application further provide a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the wireless link monitoring apparatus provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the wireless link monitoring apparatus in the various embodiments of the present application.

The embodiments of the present application also provide a computer program product. The computer program product includes a program. The computer program product can be applied to the apparatus for wireless link monitoring provided by the embodiments of the present application, and the program enables the computer to execute the methods performed by the apparatus for wireless link monitoring in various embodiments of the present application.

The embodiments of the present application also provide a computer program. The computer program can be applied to the apparatus for wireless link monitoring provided by the embodiments of the present application, and the computer program enables the computer to execute the methods performed by the apparatus for wireless link monitoring in various embodiments of the present application.

It should be understood that, in this embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is only determined according to A, and B may also be determined according to A and/or other information.

It should be understood that the term "and/or" in this document is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available media that can be read by a computer, or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media. The available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, digital video discs (DVDs)), or semiconductor media (eg, solid state disks (SSDs)) )Wait.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (16)

1. A method for wireless link monitoring, wherein the method comprises: determining an average value of multiple signal quality measurement values of the target resource in the current reporting period, where the multiple signal quality measurement values are within a preset duration; The radio link is evaluated according to the result of comparing the average value with a preset threshold. 2 . The method according to claim 1 , wherein the preset duration is a synchronous IS evaluation cycle or an out-of-sync OOS evaluation cycle corresponding to the current reporting cycle. 3 . 3. The method according to claim 1 or 2, wherein the signal quality measurement value is a signal-to-noise ratio value or a mutual information value. 4. The method according to any one of claims 1 to 3, wherein the preset duration includes multiple reporting periods, the current reporting period is one of the multiple reporting periods, and the The multiple reporting periods are in one-to-one correspondence with multiple storage spaces, and each storage space in the multiple storage spaces stores one or more signal quality measurement values in the corresponding reporting period. 5. The method according to claim 4, wherein each storage space in the plurality of storage spaces stores the accumulated value of one or more signal quality measurement values in the corresponding reporting period and the The number of signal quality measurements described above. 6 . The method according to claim 4 or 5 , wherein each storage space in the plurality of storage spaces further stores a time label of one or more signal quality measurement values in its corresponding reporting period. 7 . 7. The method according to any one of claims 4 to 6, wherein the plurality of storage spaces store signal quality measurement values on a first-in, first-out basis. 8. The method according to any one of claims 4 to 7, wherein the storage space is a cache of a terminal device. 9. The method according to any one of claims 1 to 8, wherein the preset threshold comprises a synchronization threshold and an out-of-synchronization threshold; Wherein, evaluating the wireless link according to the comparison result of the average value and the preset threshold includes: If the average value is greater than the synchronization threshold, the radio link is in a synchronization state; If the average value is less than the out-of-synchronization threshold, the wireless link is in an out-of-synchronization state. The method according to any one of claims 1 to 9, wherein the reporting period and the preset duration are determined according to a state of a terminal device, and the state of the terminal device includes discontinuous reception status and continuous reception status. 11. A device for wireless link monitoring, comprising: a determining unit, configured to determine an average value of multiple signal quality measurement values of the target resource in the current reporting period, where the multiple signal quality measurement values are within a preset duration; An evaluation unit, configured to evaluate the wireless link according to the comparison result of the average value and a preset threshold. 12. An apparatus for wireless link monitoring, characterized by comprising a memory, a transceiver and a processor, wherein the memory is used for storing programs, the transceiver is used for receiving and transmitting wireless signals, and the processor is used for calling the A program in the memory to perform the method as claimed in any one of claims 1 to 10. 13. A chip, characterized by comprising a processor for invoking a program from a memory to cause a device on which the chip is installed to execute the method according to any one of claims 1 to 10. 14. A computer-readable storage medium, characterized in that a program is stored thereon, the program causing a computer to perform the method according to any one of claims 1 to 10. 15. A computer program product, characterized by comprising a program that causes a computer to perform the method of any one of claims 1 to 10. 16. A computer program, characterized in that the computer program causes a computer to perform the method of any one of claims 1 to 10.

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