Multiburst TRS measurement settings

Abstract

Methods, systems, and apparatus are disclosed. According to some embodiments, a network node is configured to configure a radio device to perform time-domain channel property (TDCP) measurements based on a first tracking reference signal (TRS) burst and a second TRS burst, to cause the transmission of a first TRS burst and a second TRS burst, wherein the first TRS burst is one of aperiodic and periodic and the second TRS burst is one of aperiodic and periodic, and to receive configuration and instructions for TDCP measurements based on the first TRS burst and the second TRS burst.

Description

[Technical Field]

[0001] This disclosure relates to wireless communication, and more particularly to multiburst tracking reference signal (TRS) TRS measurement settings. [Background technology]

[0002] The Third Generation Partnership Project (3GPP) is developing and is developing standards for fourth-generation (4G) wireless communication systems (also known as Long Term Evolution (LTE)) and fifth-generation (5G) wireless communication systems (also known as New Radio (NR)). Among the features of such systems are broadband communication between network nodes, such as base stations, and mobile radio devices (WDs), as well as communication between network nodes and between WDs. 3GPP is also developing standards for sixth-generation (6G) wireless communication networks.

[0003] Multi-user, multi-input, multi-output (MU-MIMO) In MU-MIMO, two or more users (e.g., wireless devices) within the same cell are jointly scheduled on the same time-frequency resource. That is, two or more independent data streams are transmitted simultaneously to different wireless devices, and spatial domains can commonly be used to isolate each stream. Transmitting several streams simultaneously can increase the system's capacity. However, this comes at the cost of reducing the signal-to-interference plus noise ratio (SINR) per stream, as power must be shared between streams and the streams can interfere with each other.

[0004] Channel Status Information Reference Signal (CSI-RS) In CSI measurement and feedback, CSI-RS is defined. CSI-RS is transmitted on each antenna port and used by radio devices to measure the downlink channel between each transmitting antenna port and each receiving antenna port. Transmitting antenna ports are also called CSI-RS ports. The number of antenna ports supported in NR is {1, 2, 4, 8, 12, 16, 24, 32}. By measuring the received CSI-RS, radio devices can estimate the channel that the CSI-RS is traversing, including the radio propagation channel and antenna gain. CSI-RS for the above purposes is also called non-zero power (NZP) CSI-RS.

[0005] CSI-RS can be configured to transmit within several resource elements (REs) in a slot and within several slots. Figure 1 shows an example of CSI-RS REs for 12 antenna ports, with one RE per resource block (RB) per port.

[0006] Furthermore, interference measurement resources (IMRs) for wireless devices to measure interference are also defined in the NR. An IMR resource consists of either four REs, i.e., four adjacent REs at the same OFDM symbol at the same frequency, or 2x2 adjacent REs at both time and frequency in a slot. By measuring both the channel based on NZP CSI-RS and the interference based on IMR, wireless devices can estimate the effective channel and noise plus interference to determine the CSI, i.e., rank, precoding matrix, and channel quality.

[0007] Furthermore, wireless devices in NR may be configured to measure interference based on one or more NZP CSI-RS resources.

[0008] Tracking Reference Signal (TRS) Oscillator defects can cause transmission and reception to be out of sync in time and / or frequency, which can lead to inter-symbol and intra-symbol interference. NR introduced a tracking reference signal (TRS) that can be used by wireless devices for fine-grained time / frequency synchronization.

[0009] In the NR 3GPP specification, a TRS may be set when no CSI reporting setting is configured, or when the higher-layer parameter "reportQuantity" in the CSI-ReportConfig information element (IE) associated with all reporting settings linked to a CSI-RS resource set containing (one or more) TRSs is set to "none". This means that CSI reporting based on measurements for TRSs is not supported in the NR.

[0010] A TRS is configured via "trs-info" in the NZP-CSI-RS-ResourceSet information element (IE) of 3GPP Technical Specification (TS) 38.331 relating to a CSI-RS resource set, and for that CSI-RS resource set, a wireless device can assume that the antenna ports with the same port index as the configured NZP CSI-RS resources in the resource set are the same. From the perspective of the 3GPP specification, a TRS is designated as a special type of NZP CSI-RS where the corresponding NZP CSI-RS resource set containing (one or more) TRS has a truly set upper-layer parameter "trs-info".

[0011] TRS is not actually a CSI-RS, but rather a resource set consisting of multiple periodic NZP CSI-RSs. More specifically, TRS consists of four 1-port, density 3 CSI-RSs located in two consecutive slots. The CSI-RSs in the resource set can be set to a periodicity of 10, 20, 40, or 80 ms. Note that the exact set of REs used for TRS CSI-RSs may vary. There can be a 4-symbol time domain separation between two CSI-RSs in a slot. Figure 2 shows an example of a TRS burst of two TRS symbols in two adjacent slots.

[0012] NR also supports aperiodic TRS.

[0013] In LTE, the Cell-Specific Reference Signal (CRS) served the same purpose as the TRS, as the LTE CRS could be used for synchronization, but it could also be used for CSI reporting, which is not supported for the TRS in NR. However, compared to the LTE CRS, the TRS in NR implies far less overhead, requiring only one antenna port and existing in only two slots per TRS period. Figure 3 shows the configurability of the TRS symbol position and TRS burst periodicity.

[0014] CSI framework in NR In NR, a wireless device may have multiple CSI reporting settings and multiple CSI-RS resource settings. Each resource setting may contain multiple resource sets, and each resource set may contain up to eight CSI-RS resources. For each CSI reporting setting, the wireless device provides CSI reporting feedback.

[0015] Each CSI reporting setting includes at least the following information: • CSI-RS resource set for channel measurement • IMR resource set for interferometry · Randomly, CSI-RS resource sets for interference measurement · Time-domain behavior, i.e., periodic, semi-persistent, or aperiodic reporting · Frequency granularity, i.e., wideband or sub-band · CSI parameters to be reported, such as RI, PMI, CQI, and CSI-RS resource indicator (CRI) in the case of multiple CSI-RS resources in a resource set · Codebook type, i.e., type I or II, and codebook subset restrictions · Measurement limitations · Sub-band size. One of two possible sub-band sizes is indicated, and the value range depends on the bandwidth of the BWP. (When set for sub-band reporting) One CQI / PMI is fed back per sub-band

[0016] Type 1 and Type 2 codebooks in NR Type 1 codebook (CB) is generally used by a wireless device to report CSI for single-user MIMO (SU-MIMO) scheduling in NR. On the other hand, Type 2 CB is generally for more accurate CSI feedback for multi-user MIMO (MU-MIMO) scheduling

[0017] For both Type 1 CB and Type 2 CB, for each rank, the precoding matrix W is W = W1W2 defined in the form of where TIFF2026514294000002.tif101702 is an N×2L matrix and contains information on L selected DFT beams {d i , i = 1,..., L}, where d iW1 is an N×1 DFT vector, where N is the number of CSI-RS ports per polarization, and W2 is a 2L×v matrix containing cophasing coefficients between selected beams and between antenna ports with two different polarizations, where v is the number of layers or ranks. W1 is the same for the entire CSI bandwidth, and W2 can be for the entire bandwidth or per subband.

[0018] In the case of Type 1 CB, the precoding vector for each MIMO layer is associated with a single DFT beam. In contrast, in Type 2 CB, the precoding vector for each layer is a linear combination of multiple DFT beams.

[0019] Extended Type 2 Codebook in NR In NR Rel-16, Type 2 CBs are extended by applying frequency-domain (FD) DFT basis vectors across all subbands to reduce CSI feedback overhead and / or improve CSI accuracy. Instead of reporting W2 for each subband, a linear combination of DFT basis vectors is used to jointly represent W2 across the entire CSI bandwidth. For each layer, the precoding matrix W across all subbands takes the following form: This is from TIFF2026514294000003.tif7170. Here, W f =[f1,...,f M ] is a set of M selected DFT basis vectors {f1,...,f M It is a matrix that contains}, TIFF2026514294000004.tif6170 is a 2L × M matrix containing coefficients for each selected DFT beam and each selected FD basis vector.

[0020] QCL and TCI status Several signals may be transmitted from different antenna ports on the same network node (e.g., a base station). These signals may have the same large-scale properties, such as Doppler shift / spread, mean delay spread, or mean delay. These antenna ports are then referred to as quasi-co-located (QCL).

[0021] If a wireless device knows that two antenna ports are QCLed with respect to a certain parameter (e.g., Doppler spread), the wireless device can estimate that parameter based on one of the antenna ports and apply that estimate to receive the signal on the other antenna port. Generally, the first antenna port is represented by a measurement reference signal, such as a TRS or SSB (known as source RS), and the second antenna port is a demodulation reference signal (DMRS) (known as target RS).

[0022] For example, if antenna ports A and B are QCLed with respect to mean delay, a wireless device can estimate the mean delay from the signal received from antenna port A and assume that the signal received from antenna port B has the same mean delay. This is useful for demodulation because the wireless device can know the channel properties in advance, which helps, for example, the wireless device to select an appropriate channel estimation filter.

[0023] Information regarding possible assumptions about QCL is signaled from the network node to the radio device. NR defines four types of QCL relationships between transmitted source RS and transmitted target RS. Type A: {Doppler shift, Doppler diffusion, mean delay, delayed diffusion} Type B: {Doppler shift, Doppler diffusion} Type C: {Average delay, Doppler shift} Type D: {Spatial Rx parameter}

[0024] Aperiodic CSI-RS / IM and CSI reporting For both aperiodic CSI-RS / IM resources and aperiodic CSI reports, triggering is carried out together by sending a DCI with format 0_1 ​​from the network node to the radio device using the downlink control channel, PDCCH. This is the DCI format that schedules the PUSCH transmission on which the aperiodic CSI report will be carried. The DCI with format 0_1 ​​contains a CSI request field that can be set to be between 0 and 6 bits wide using the higher-layer configuration (i.e., RRC) from the network node to the radio device.

[0025] Therefore, the CSI request field is at most S c =2 6 =This may contain 64 code points. If this field is set to all 0, no CSI is requested, and DCI format 0_1 ​​will schedule only a normal push transmission containing UL data. Non-zero code points, on the other hand, refer to so-called aperiodic trigger conditions set by the RRC from the network node to the radio device. Aperiodic trigger conditions are defined as a list of up to 16 aperiodic CSI reporting settings, each identified by a CSI reporting setting ID (although generally a much lower number of reporting settings are used), and for those settings, the radio device may simultaneously calculate and include the CSI in a scheduled push transmission.

[0026] If the CSI reporting setting is linked to (one or more) periodic / semi-persistent resource settings, then no further information is needed because in this case there is only one set of resources included in the resource setting for channel / interference measurements.

[0027] However, when a CSI reporting setting is linked to an aperiodic resource setting (which may have multiple resource sets), the DCI format 0_1 ​​must specify which CSI-RS / IM resource set should be used for measurement. This allows a network node to dynamically switch which CSI-RS / IM resources will be used for measurement each time an aperiodic report is triggered by a DCI having format 0_1, by setting it by RRC and specifying different aperiodic trigger states by DCI format 0_1 ​​for a given CSI reporting setting. This means that the aperiodic NZP CSI-RS resource set for channel measurement, the aperiodic CSI-IM resource set for interference measurement (if used), and the aperiodic NZP CSI-RS resource set for interference measurement (if used) for use with a given CSI reporting setting are also included in the aperiodic trigger state specification.

[0028] In the case of aperiodic NZP CSI-RS, the QCL source to be used (i.e., the TCI state) is also set in aperiodic trigger state, which allows network nodes to dynamically switch the radio device Rx beam assumption for receiving NZP CSI-RS.

[0029] Figure 4 shows an exemplary non-periodic trigger state and its mapping from DCI code points.

[0030] It is possible to set up to 128 aperiodic trigger states via Radio Resource Control (RRC). However, the number of code points in the CSI request bit field in DCI format 0_1 ​​is only between 0 and 63. Therefore, it is possible to set more trigger states in RRC than can be indicated by the DCI field. When this is the case, i.e., M aperiodic trigger states are set in RRC, but (bit width N) TSThe CSI request bit field (with \(i = 0,\ldots,6\)) When TIFF2026514294000005.tif5170 contains only non-zero code points, S c An intermediate sub-selection or mapping between S code points and M RRC-configured trigger states needs to be performed. This sub-selection is performed by transmitting a MAC CE sub-selection command.

[0031] Aperiodic CSI-RS / IM is a one-shot measurement that exists only for a single time instance and is used only to determine CSI for a single aperiodic report. The temporal position of the aperiodic CSI-RS / IM is defined as a slot offset with respect to the slot in which the DCI containing the trigger is received. The slot offset is defined at the CSI-RS resource set level and the offset enables the wireless device to use a certain time to complete the calculation of CSI measurement and reporting and to prepare for the uplink transmission of the report. In the case of aperiodic CSI-IM, there is no defined explicit slot offset, rather it is assumed that the CSI-IM and CSI-RS exist in the same slot in order to enable efficient CSI processing in the wireless device.

[0032] Channel correlation, Doppler spectrum, and the Jakes model The wireless channel \(h(t)\) between the network node and the wireless device may change over time as the wireless device moves. This is generally because the signal received at the wireless device comprises many paths of radio waves reflected from objects (such as trees and buildings) around the wireless device, each path having a different angle of arrival (AOA) at the wireless device and thus having a different Doppler frequency as the wireless device moves. It is known that when the AOAs of those paths are uniformly distributed over \([-\pi,\pi]\) in the azimuth direction, the Doppler power spectrum for the channel \(h(t)\) can be modeled (i.e., in two dimensions) using the Jakes model as follows. TIFF2026514294000006.tif19170

[0033] The autocorrelation of the channel is R hh (τ) is defined as E[h(t)h*(t+τ)]. Normalized autocorrelation R hh (τ) / R hh (0) = J0(2π·τ·f max ) is the inverse Fourier transform of S(f), where J0(·) is the first kind of zero-order Bessel function and E[·] is the expectation value.

[0034] Figure 5 shows an example of a first-order zero-order Bessel function. The y-axis represents autocorrelation, and the x-axis represents 2π·τ·f max This demonstrates that 2π·τ·f max It is monotonic only when <3.8317, and within that range, and for a given τ, the correlation and f max It can be seen that there is a one-to-one mapping between them.

[0035] 3GPP Rel-18 specification for TRS-based TDCP reporting The following was considered at the RAN1#109e meeting: The scope of work for TRS-based TDCP reporting focuses on the following use cases for evaluation purposes. - Targeting medium and high wireless device speeds, such as 10-120 km / h and HST speeds. - Network nodes, - CSI reporting settings and CSI-RS resource setting parameters, - Precoding method using either a CSI feedback-based precoding method or a UL-SRS reciprocity-based precoding method. Helping to make a decision - To assist in predicting CSI on the network node side.

[0036] As described above, there are several use cases for network nodes to know the time domain channel property (TDCP) based on TRS measurements. One use case for TDCP reporting is to allow network nodes to select a transmission method that is more robust to channel aging when channels are rapidly changing. For example, based on the TRS-based TDCP reported to the network node by a wireless device, the network node may need to determine whether the precoder for the wireless device should be based on CSI obtained from uplink measurements or on CSI feedback obtained from the wireless device. Another example is that the network node may need to determine whether the precoder that should schedule a wireless device should be based on type I CSI feedback obtained from the wireless device or on type II CSI feedback obtained from the wireless device.

[0037] Figures 6a and 6b are exemplary diagrams showing exemplary average user throughput for a particular scheme versus average throughput for feedback-based SU-MIMO precoding (baseline). In particular, these figures show relative average user throughput versus radio device speed for reciprocity-based CSI and feedback-based CSI, with Figure 6a showing 16 network node antenna ports and Figure 6b showing 32 network node antenna ports. Throughput is calculated for a traffic load corresponding to 70% resource utilization for a baseline case at each radio device speed. Results for both single-user (SU)-MIMO and MU-MIMO are shown in Figures 6a and 6b. The scenario is UMa with a site-to-site distance of 500m. The carrier frequency is 2GHz and the subcarrier spacing is 15kHz. The CSI periodicity is 20ms for both feedback-based CSI and reciprocity-based CSI. The results show that reciprocity-based precoding performs better at 3km / h for both SU-MIMO and MU-MIMO. However, at wireless device speeds of approximately 10 km / h, feedback-based precoding performs better. Therefore, feedback-based precoding is more robust to rapidly fluctuating channels. A speed of 10 km / h corresponds to a channel coherence time longer than two slots.

[0038] Figures 7a and 7b illustrate an exemplary comparison of precoding performance based on Type I CSI and Type II CSI, respectively. The results show that Type II CSI provides better performance at 3 km / h, while Type I provides better performance at approximately 10 km / h and higher wireless device speeds.

[0039] These results suggest that selecting a precoding scheme based on a parameter related to wireless device speed may be beneficial. It should be noted that this fundamental parameter in this context is not the wireless device speed itself. Rather, it is how quickly the channel fluctuates, which depends on the wireless device speed and the angle between the wireless device velocity vector and the propagation path referenced or experienced by the wireless device. Therefore, selecting a precoding scheme based on a time-domain channel property, such as coherence time or autocorrelation, may be a more favorable parameter.

[0040] Radio device measurement and reporting of time-domain correlations based on TRS samples across different time lags is an efficient way to report TDCP based on TRS.

[0041] To define the time-domain correlation measurement across TRS samples, X l Let [n], n=0,1,...,N-1 be the received frequency-domain TRS samples after matched filtering and after removing the reference signal sequence. Index l indicates different OFDM symbols that carry the TRS used for correlation estimation. Note that the TRS used for correlation estimation may be in the same or different slots. The temporal starting point of OFDM symbol l is t l (to be precise, t l (This indicates the start of the non-CP portion of the OFDM symbol). Index n represents the TRS sample index (assumed to be proportional to the subcarrier index).

[0042] P m (u),m=1...M,u=1,2 Let l be the index of M symbol pairs to be used for estimating the correlation of TIFF2026514294000007.tif6170. It is assumed that the M symbol pairs are separated by the same temporal distance.

[0043] For example, a low-complexity estimate of the normalized time-domain correlation with respect to delay τ is obtained in the frequency domain, It will be calculated as TIFF2026514294000008.tif12170.

[0044] In another example, the inverse DFT is calculated for each OFDM symbol l. Y l [k]=ifft(X l [n])

[0045] The normalized correlation estimate for time delay τ is, It was calculated as TIFF2026514294000009.tif12170, Here, the sum over time samples is, for example, By using a noise threshold such as TIFF2026514294000010.tif19170, for example, noise can be suppressed over a defined set Γ(m). Here, This is an estimated noise value for TIFF2026514294000011.tif6170.

[0046] Note that at low speeds, the changes in the channel are small, and the changes in correlation at different delays within a TRS burst are extremely small (note that the TRS burst is defined in Figure 2). Within a TRS burst, correlations can be measured for delays of 4 symbols, 10 symbols, 14 symbols, and 18 symbols, as shown in Figure 8. In particular, Figure 8 shows the delay τ for which correlations can be estimated based on measurements within a TRS burst using the TRS signal. k Here is an example: τ1 = 4·T OFDM+CP In the case of τ²=T SLOT=14·T OFDM+CP In this case, within the TRS burst, there are two samples that can be used for measurement, and τ3 = 18·T OFDM+CP and τ4 = 10·T OFDM+CP In this case, please note that there is only one sample within the TRS burst that can be used for measurement.

[0047] The change in correlation across different delays within a TRS burst is extremely small at low velocities; therefore, measurements within a TRS burst are insufficient to distinguish between different velocities in the low-velocity region. Consequently, support is needed for measuring and reporting the correlations between time delays corresponding to multiple TRS bursts.

[0048] CSI Configuration Signaling 3GPP TS38.331 specifies the information elements for CSI-RS-ResourceMapping, CSI-FrequencyOccupation, and CSI-ResourcePeriodicityAndOffset as follows:

[0049] - CSI-RS-ResourceMapping IE CSI-RS-ResourceMapping is used to configure resource element mapping for CSI-RS resources in the time and frequency domains.

[0050] CSI-RS-ResourceMapping Information Element TIFF2026514294000012.tif214170TIFF2026514294000013.tif144170

[0051] - CSI-FrequencyOccupation IE CSI-FrequencyOccupation is used to configure frequency domain occupancy for channel state information measurement resources (e.g., NZP-CSI-RS resources, CSI-IM resources).

[0052] CSI-FrequencyOccupation Information Element TIFF2026514294000014.tif89170TIFF2026514294000015.tif43170

[0053] - CSI-ResourcePeriodicityAndOffset The IE CSI-ResourcePeriodicityAndOffset is used to set the periodicity and corresponding offset for periodic and semi-persistent CSI resources, as well as for periodic and semi-persistent CSI reporting on PUCCH, where both periodicity and offset are given in units of slots. A periodicity value of slots4 corresponds to 4 slots, a value of slots5 corresponds to 5 slots, and so on.

[0054] CSI-ResourcePeriodicityAndOffset information element TIFF2026514294000016.tif151170

[0055] Discussion of 3GPP TS38.214 regarding TRS A description of TRS (i.e., CSI-RS for tracking) is provided in 3GPP TS38.214, as shown below. 5.1.6.1.1 CSI-RS for tracking

[0056] A wireless device in RRC connection mode is expected to receive the upper-layer wireless device-specific configuration of the NZP-CSI-RS-ResourceSet, which has the upper-layer parameter trs-Info set.

[0057] In an NZP-CSI-RS-ResourceSet with the upper-layer parameter trs-Info set, wireless devices assume that the antenna ports with the same port index in the configured NZP CSI-RS resources within the NZP-CSI-RS-ResourceSet are the same. - In frequency range 1, a wireless device may be configured with one or more NZP CSI-RS sets, where the NZP-CSI-RS-ResourceSet consists of four periodic NZP CSI-RS resources in two consecutive slots, each containing two periodic NZP CSI-RS resources. If two consecutive slots are not designated as downlink slots by tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigDedicated, the wireless device may be configured with one or more NZP CSI-RS sets, where the NZP-CSI-RS-ResourceSet consists of two periodic NZP CSI-RS resources in one slot. - In frequency range 2, a wireless device may be configured with one or more NZP CSI-RS sets, where the NZP-CSI-RS-ResourceSet consists of two periodic CSI-RS resources in one slot, or matches an NZP-CSI-RS-ResourceSet of four periodic NZP CSI-RS resources in two consecutive slots, each having two periodic NZP CSI-RS resources.

[0058] A wireless device configured with one or more NZP-CSI-RS-ResourceSets, in which the upper layer parameter trs-Info is set, may have CSI-RS resources configured as follows: - It is periodic, and the same periodicity, bandwidth, and subcarrier location are set for CSI-RS resources in NZP-CSI-RS-ResourceSet. - A periodic CSI-RS resource in one set and a non-periodic CSI-RS resource in a second set, where the non-periodic CSI-RS resource and the periodic CSI-RS resource have the same bandwidth (at the same RB location), and the non-periodic CSI-RS, along with the periodic CSI-RS resource, is set to qcl-Type, set to "typeA" and "typeD", where applicable. In frequency range 2, the radio device has a scheduling offset between the last symbol of the PDCCH carrying the triggering DCI and the first symbol of the non-periodic CSI-RS resource in the CSI-RS symbol. Not expecting it to be smaller than TIFF2026514294000017.tif6170, here beamSwitchTiming is a wireless device reported value as defined in 3GPP TS38.306, and that reported value is One of the values ​​in TIFF2026514294000018.tif7170, where the beam switching timing delay d is μ PDCCH <μ CSIRS If so, it is specified in Table 5.2.1.5.1a-1; otherwise, d is 0. The wireless device expects the same number of CSI-RS resources to be set in the periodic CSI-RS resource set and the aperiodic CSI-RS resource set, and the same number of CSI-RS resources in the slots. In the aperiodic CSI-RS resource set, if triggered, and if the associated periodic CSI-RS resource set is set with four periodic CSI-RS resources, having two consecutive slots with two periodic CSI-RS resources in each slot, the upper layer parameter aperiodicTriggeringOffset indicates the trigger offset for the first slot for the first two CSI-RS resources in that set.

[0059] The wireless device does not expect that a CSI-ReportConfig linked to a CSI-ResourceConfig containing an NZP-CSI-RS-ResourceSet with trs-Info set, and a CSI-ReportConfig with the upper-layer parameter timeRestrictionForChannelMeasurements set to "configured", will be configured.

[0060] Wireless devices do not expect the CSI-ReportConfig to be set such that the upper-layer parameter reportQuantity is set to something other than "none" for a non-periodic NZP CSI-RS resource set with trs-Info configured.

[0061] Wireless devices do not expect CSI-ReportConfig to be set for periodic NZP CSI-RS resource sets where trs-Info is configured.

[0062] Wireless devices do not expect an NZP-CSI-RS-ResourceSet to be configured with both trs-Info and repetition set.

[0063] Each CSI-RS resource, as defined in section 7.4.1.5.3 of 3GPP TS38.211, is configured by the upper-layer parameter NZP-CSI-RS-Resource, subject to the following limitations: - As defined by the higher-layer parameter CSI-RS-resourceMapping, the time-domain locations of two CSI-RS resources in a slot, or four CSI-RS resources in two consecutive slots (which are the same across two consecutive slots), are given by: - Regarding frequency range 1 and frequency range 2... - Regarding frequency range 2... - A single-port CSI-RS resource with a density given by Table 7.4.1.5.3-1 from 3GPP TS38.211 and a higher-layer parameter density set by CSI-RS-ResourceMapping. TIFF2026514294000019.tif7170 When a carrier is set in the pair spectrum, the bandwidth of the CSI-RS resources, as given by the upper layer parameter freqBand set by CSI-RS-ResourceMapping, is equal to X resource blocks, where X ≥ 28 resource blocks, and when the wireless device instructs trs-AdditionalBandwidth capability for CSI-RS for tracking or addBW-Set1 for aperiodicCSI-RS-AdditionalBandwidth capability for aperiodicCSI-RS for high-speed SCell activation, X ≥ 28 resource blocks, and when the wireless device instructs AdditionalBandwidth capability for CSI-RS for tracking If you instruct trs-AddBW-Set2 for force or addBW-Set2 for aperiodicCSI-RS-AdditionalBandwidth capability for aperiodic CSI-RS for high-speed SCell activation, then X≧32; in these cases, if the wireless device is configured with a CSI-RS having X<52 resource blocks, the wireless device does not expect the total number of PRBs to be more than 4, which are allocated for DL ​​transmission but do not overlap with PRBs that carry CSI-RS for tracking, where all CSI-RS resource configurations span the same set of resource blocks; otherwise, the bandwidth of the CSI-RS resources, as given by the upper layer parameter freqBand configured by CSI-RS-ResourceMapping, Is it a TIFF2026514294000020.tif8170 resource block, or This is equivalent to the TIFF2026514294000021.tif8170 resource block. In operation with shared spectral channel access in FR1, the freqBand set by CSI-RS-ResourceMapping is a minimum of 48 and Is it a TIFF2026514294000022.tif8170 resource block, or This is equivalent to the resource block TIFF2026514294000023.tif8170. - The wireless device does not expect the periodicity of X slots to be set if the bandwidth of the CSI-RS resources is greater than 52 resource blocks. - For a periodic NZP CSI-RS resource, the periodicity and slot offset, as given by the higher-layer parameter periodicityAndOffset set by NZP-CSI-RS-Resource, is one of Y slots, where Y is 10, 20, 40, or 80, and μ is defined in section 4.3 of 3GPP TS38.211. - The same powerControlOffset and powerControlOffsetSS are given by the NZP-CSI-RS-Resource value across all resources. ...

[0064] Aperiodic CSI-RS for tracking high-speed SCell activation A wireless device may be configured with a non-periodic CSI-RS resource for tracking SCells for fast SCell activation, using one or more NZP-CSI-RS-ResourceSets that have the upper layer parameter scellActivationRS-ConfigToAddModList, which has a QCL relationship provided by the upper layer parameter qcl-Info given by SCellActivationRS-Config, similar to the case of non-periodic CSI-RS for tracking in Section 5.1.6.1.1 (of 3GPP TS38.214).

[0065] Each CSI-RS resource, as defined in section 7.4.1.5.3 of 3GPP TS38.211, is configured by the upper-layer parameter NZP-CSI-RS-Resource, subject to the same restrictions as those defined for CSI-RS for tracking in section 5.1.6.1.1.

[0066] In existing NR specifications, the minimum supported periodicity of TRS is 10 ms, which may not provide sufficient autocorrelation for TDCP measurements.

[0067] Therefore, a technique is needed that enables sufficient TDCP measurement based on TRS. The purpose of this disclosure is to address such a need. [Overview of the project]

[0068] Some embodiments advantageously provide methods, systems, and apparatus for setting up multiburst tracking reference signals (TRS) TRS measurements.

[0069] In one or more embodiments, different methods are proposed for setting up TRS measurement resources to calculate autocorrelation values ​​smaller than 10 ms, as described herein.

[0070] According to one embodiment, a method implemented by a wireless device (WD) is provided. The method includes receiving a configuration for performing a time-domain channel property (TDCP) measurement based on a first tracking reference signal (TRS) burst and a second TRS burst. Furthermore, the method includes receiving the first TRS burst and the second TRS burst. The first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic. Furthermore, the method includes performing a TDCP measurement based on the configuration and the first TRS burst and the second TRS burst.

[0071] A further embodiment provides a method implemented by a network node. This method includes configuring a WD to perform TDCP measurements based on a first TRS burst and a second TRS burst. Furthermore, this method includes triggering the transmission of the first TRS burst and the second TRS burst. The first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic. Furthermore, this method includes receiving the configuration and instructions for TDCP measurements based on the first TRS burst and the second TRS burst.

[0072] According to a further embodiment, a WD is provided. The WD is configured to receive settings for performing TDCP measurements based on a first TRS burst and a second TRS burst. Furthermore, the WD is configured to receive a first TRS burst and a second TRS burst. The first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic. Furthermore, the WD is configured to perform TDCP measurements based on settings and the first TRS burst and the second TRS burst.

[0073] In a further embodiment, a WD is provided. The WD comprises a processing circuit and a memory for storing instructions to be executed by the processing circuit. The execution of instructions by the processing circuit causes the WD to receive a configuration for performing a TDCP measurement based on a first TRS burst and a second TRS burst. Furthermore, the execution of instructions by the processing circuit causes the WD to receive a first TRS burst and a second TRS burst. The first TRS burst is either aperiodic or periodic, and the second TRS burst is either aperiodic or periodic. Furthermore, the execution of instructions by the processing circuit causes the WD to perform a TDCP measurement based on the configuration and the first TRS burst and the second TRS burst.

[0074] According to a further embodiment, a network node is provided. The network node is configured to configure a WD to perform TDCP measurements based on a first TRS burst and a second TRS burst. Furthermore, the network node is configured to trigger the transmission of the first TRS burst and the second TRS burst. The first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic. Furthermore, the network node is configured to receive configuration and instructions for TDCP measurements based on the first TRS burst and the second TRS burst.

[0075] In a further embodiment, a network node is provided. The network node comprises a processing circuit and a memory for storing instructions to be executed by the processing circuit. The execution of instructions by the processing circuit causes the network node to configure the WD to perform TDCP measurements based on a first TRS burst and a second TRS burst. Furthermore, the execution of instructions by the processing circuit causes the network node to transmit a first TRS burst and a second TRS burst. The first TRS burst is either aperiodic or periodic, and the second TRS burst is either aperiodic or periodic. Furthermore, the execution of instructions by the processing circuit causes the network node to receive instructions for configuration and TDCP measurements based on the first TRS burst and the second TRS burst.

[0076] In a further embodiment, a computer program or computer program product is provided, for example, in the form of a non-temporary storage medium, comprising a computer-executable instruction that, when executed by a WD processing circuit, causes the WD to receive a setting for performing a TDCP measurement based on a first TRS burst and a second TRS burst. Furthermore, the execution of the instruction by the processing circuit causes the WD to receive a first TRS burst and a second TRS burst. The first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic. Furthermore, the execution of the instruction by the processing circuit causes the WD to perform a TDCP measurement based on the setting and the first TRS burst and the second TRS burst.

[0077] In a further embodiment, a computer program or computer program product is provided, for example, in the form of a non-temporary storage medium, comprising a computer-executable instruction that, when executed by a processing circuit of a network node, causes the network node to configure a WD to perform TDCP measurements based on a first TRS burst and a second TRS burst. Furthermore, the execution of the instruction by the processing circuit causes the network node to transmit a first TRS burst and a second TRS burst. The first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic. Furthermore, the execution of the instruction by the processing circuit causes the network node to receive instructions for configuration and TDCP measurements based on the first TRS burst and the second TRS burst.

[0078] When considered in conjunction with the attached drawings, a more complete understanding of these embodiments, as well as their associated advantages and features, will be more readily apparent by referring to the following detailed description. [Brief explanation of the drawing]

[0079] [Figure 1]This is an example diagram of RE allocation for a 12-port CSI-RS in NR. [Figure 2] This diagram shows an example of RE allocation for a TRS burst with two TRS symbols in two adjacent slots. [Figure 3] This diagram shows the configurability of TRS symbol positions and TRS burst periodicity. [Figure 4] This is a diagram illustrating exemplary aperiodic trigger states and their mapping from DCI code points. [Figure 5] This is a diagram of a first-order zero-order Bessel function. [Figure 6] This is a diagram illustrating examples of relative mean user throughput versus wireless device speed for reciprocity-based CSI and feedback-based CSI. [Figure 7] This diagram compares the performance of Type I CSI and Type I CSI-based precoding. [Figure 8] This is a delay diagram where correlations can be estimated based on measurements within a TRS burst using the TRS signal. [Figure 9] This is a schematic diagram of an exemplary network architecture illustrating a communication system connected to a host computer via an intermediate network, based on the principles described herein. [Figure 10] This is a block diagram of a host computer communicating with a wireless device via a network node, at least partially over a wireless connection, according to some embodiments of the present disclosure. [Figure 11] This flowchart illustrates an exemplary method implemented in a communication system including a host computer, a network node, and a wireless device for running a client application on a wireless device, according to some embodiments of the present disclosure. [Figure 12] This flowchart illustrates an exemplary method implemented in a communication system including a host computer, a network node, and a wireless device for receiving user data in a wireless device, according to some embodiments of the present disclosure. [Figure 13] This flowchart illustrates an exemplary method implemented in a communication system including a host computer, a network node, and a wireless device for receiving user data from a wireless device on a host computer, according to some embodiments of the present disclosure. [Figure 14] This flowchart illustrates an exemplary method implemented in a communication system including a host computer, a network node, and a wireless device for receiving user data on a host computer, according to some embodiments of the present disclosure. [Figure 15] This is a flowchart of an exemplary process in a network node according to some embodiments of the present disclosure. [Figure 16] This is a flowchart illustrating an exemplary process in a wireless device according to some embodiments of the present disclosure. [Figure 17] This is a diagram of one embodiment of the present disclosure. [Figure 18] This figure shows an example of two bursts of periodic TRS used for periodic TDCP measurement according to some embodiments of the present disclosure. [Figure 19] This figure illustrates an example of using two bursts of periodic TRS for non-periodic TDCP measurement, according to some embodiments of the present disclosure. [Figure 20] This figure illustrates an example of using aperiodic TDCP measurement based on one periodic TRS and one non-periodic TRS according to some embodiments of the present disclosure. [Figure 21] This figure shows an exemplary aperiodic TDCP measurement based on two aperiodic TRS according to some embodiments of the present disclosure. [Modes for carrying out the invention]

[0080] As explained above, the minimum supported periodicity of the TRS in the existing NR specification is 10 ms. However, for TDCP measurements, autocorrelation may need to be calculated for delay values ​​much smaller than 10 ms. One option is to reduce the periodicity of the TRS to a value much smaller than 10 ms. This would increase the TRS overhead, which is not a desirable solution as TDCP measurements may not be triggered very often. Therefore, the existing problem is how to support TDCP measurements using smaller delay values ​​(delay values ​​much smaller than 10 ms) without increasing the TRS overhead.

[0081] One or more embodiments described herein at least partially solve the problems of existing systems by providing different ways of setting up TRS measurement resources, proposed for calculating autocorrelation values ​​smaller than 10 ms, as described herein.

[0082] Before describing exemplary embodiments in detail, it should be noted that embodiments primarily exist as combinations of apparatus components and processing steps relating to multiburst tracking reference signal (TRS) TRS measurement settings. Accordingly, where appropriate, components are represented in the drawings by conventional symbols and only their specific details relevant to understanding the embodiments are shown, so as not to obscure this disclosure with details that would be readily apparent to those skilled in the art who are interested in the description herein. Similar numbers refer to similar elements throughout the description.

[0083] As used herein, relational terms such as “first” and “second,” “upper” and “lower” may be used simply to distinguish one entity or element from another, without necessarily requiring or implying any physical or logical relationship or order between such entities or elements. The terminology used herein is for the purpose of describing specific embodiments and does not limit the concepts described herein. As used herein, the singular forms “a,” “an,” and “the” also include the plural form unless the context otherwise explicitly indicates. Furthermore, as used herein, the terms “comprises,” “comprising,” “includes,” and / or “including” specify the presence of the described feature, complete, step, action, element, and / or component, but do not exclude the presence or addition of one or more other features, complete, step, action, element, component, and / or groups thereof.

[0084] In the embodiments described herein, joining terms such as “in communication with” may be used to indicate electrical or data communication, which can be achieved, for example, by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling, or optical signaling. Those skilled in the art will understand that multiple components can interact with each other, and that modifications and variations are possible for achieving electrical and data communication.

[0085] In some embodiments described herein, terms such as “coupled” and “connected” may be used herein to indicate a connection, though not necessarily directly, and may include wired and / or wireless connections.

[0086] As used herein, the term “network node” can refer to any type of network node present in a radio network, which may further comprise any of the following: base stations (BS), radio base stations, base transceiver stations (BTS), base station controllers (BSC), radio network controllers (RNC), g-node B (gNB), evolved node B (eNB or e-node B), node B, MSR radio nodes such as multi-standard radio (MSR) BS, multi-cell / multicast cooperative entities (MCE), radio access backhaul integrated transmission (IAB) nodes, relay nodes, donor node control relays, radio access points (AP), transmit points, transmit nodes, remote radio units (RRU), remote radio heads (RRH), core network nodes (e.g., mobile management entities (MME), self-organizing network (SON) nodes, cooperative nodes, positioning nodes, MDT nodes, etc.), external nodes (e.g., third-party nodes, nodes outside the current network), nodes in distributed antenna systems (DAS), spectrum access system (SAS) nodes, element management systems (EMS), etc. Network nodes may also include test equipment. The term “wireless node” as used herein may also be used to refer to wireless devices (WDs) or wireless network nodes, etc.

[0087] In some embodiments, the non-limiting terms "wireless device (WD)" and "user equipment (UE)" are used interchangeably. A WD as used herein can be any type of wireless device capable of communicating with a network node or another WD via wireless signals, such as a wireless device (WD). A WD can also be a wireless communication device, a target device, a D2D (device to device) WD, a machine-type WD or a WD capable of machine-to-machine communication (M2M), a low-cost and / or low-complexity WD, a sensor equipped with a WD, a tablet, a mobile terminal, a smartphone, a laptop embedded equipment (LEE), a laptop mounted equipment (LME), a USB dongle, customer premises equipment (CPE), an Internet of Things (IoT) device, or a narrowband IoT (NB-IoT) device.

[0088] In some embodiments, the general term “wireless network node” is used. A wireless network node can be any type of wireless network node, which may comprise any of the following: base stations, wireless base stations, base station transceiver stations, base station controllers, network controllers, RNCs, evolved node B (eNB), node B, gNB, multicell / multicast cooperative entity (MCE), IAB node, relay node, access point, wireless access point, remote radio unit (RRU), or remote radio head (RRH).

[0089] This disclosure may use terminology from a specific radio system, such as 3GPP LTE and / or New Radio (NR), but it should be noted that this should not be considered to limit the scope of this disclosure to the aforementioned systems only. However, other radio systems, including Wideband Code Division Multiple Access (WCDMA), Global Interoperability for Microwave Access (WiMAX), Ultra Mobile Broadband (UMB), and GSM (Global System for Mobile Communications), may also benefit from leveraging the ideas covered within this disclosure.

[0090] It should be further noted that the functions described herein as being performed by wireless devices or network nodes may be distributed across multiple wireless devices and / or network nodes. In other words, the functions of network nodes and wireless devices described herein are not limited to being performed by a single physical device, but can actually be distributed across several physical devices.

[0091] In some embodiments, a general descriptive element of the form "one of A and B" corresponds to A or B. In some embodiments, at least one of A and B corresponds to A, B or AB, or one or more of A and B, or one or both of A and B. In some embodiments, at least one of A, B, and C corresponds to one or more of A, B, and C, and / or A, B, C, or a combination thereof.

[0092] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as they would ordinarily be understood by those skilled in the art to which this disclosure belongs. Terms used herein should be interpreted as having the meanings of those terms in the context of this specification and the related art, and not in an ideal or overly formal sense unless expressly provided herein.

[0093] Some embodiments provide a multiburst tracking reference signal (TRS) measurement configuration. Referring again to the drawings, similar elements are referenced by similar reference numbers, and Figure 9 shows a schematic diagram of a communication system 10, such as a 3GPP type cellular network capable of supporting standards such as LTE and / or NR (5G), comprising an access network 12, such as a radio access network, and a core network 14, according to one embodiment. The access network 12 comprises several network nodes 16a, 16b, 16c (collectively referred to as network nodes 16), such as NBs, eNBs, gNBs, or other types of radio access points, each defining a corresponding coverage area 18a, 18b, 18c (collectively referred to as coverage area 18). Each network node 16a, 16b, 16c can be connected to the core network 14 over a wired or wireless connection 20. A first wireless device (WD) 22a located in coverage area 18a is configured to wirelessly connect to a corresponding network node 16a or to be paged by the corresponding network node 16a. A second WD 22b in coverage area 18b is wirelessly connectable to a corresponding network node 16b. Although multiple WDs 22a, 22b (collectively referred to as wireless device 22) are shown in this example, the disclosed embodiments are equally applicable to situations where only one WD is in a coverage area or where only one WD is connected to a corresponding network node 16. Only two WDs 22 and three network nodes 16 are shown for convenience, but it should be noted that a communication system may include many more WDs 22 and network nodes 16.

[0094] Furthermore, it is conceivable that WD22 may be configured to communicate simultaneously with two or more network nodes 16 and two or more types of network nodes 16, as well as / or separately with them. For example, WD22 may have dual connectivity with a network node 16 that supports LTE and the same or different network nodes 16 that support NR. As an example, WD22 may communicate with an eNB for LTE / E-UTRAN and a gNB for NR / NG-RAN.

[0095] The communication system 10 may itself be connected to a host computer 24, which may be embodied in the hardware and / or software of a standalone server, a cloud implementation server, a distributed server, or as a processing resource in a server farm. The host computer 24 may be owned or controlled by a service provider, or may be operated by or on behalf of a service provider. Connections 26, 28 between the communication system 10 and the host computer 24 may extend directly from the core network 14 to the host computer 24, or may extend via an optional intermediate network 30. The intermediate network 30 may be one of a public network, a private network, or a hosted network, or a combination of two or more of these. The intermediate network 30 may be a backbone network or the internet, if any. In some embodiments, the intermediate network 30 may comprise two or more subnets (not shown).

[0096] The communication system in Figure 9, as a whole, enables connectivity between one of the connected WD22a, 22b and the host computer 24. The connectivity can be described as an over-the-top (OTT) connection. The host computer 24 and the connected WD22a, 22b are configured to communicate data and / or signaling over the OTT connection, using the access network 12, the core network 14, an optional intermediate network 30 and possible further infrastructure (not shown) as intermediaries. The OTT connection can be transparent in the sense that at least some of the participating communication devices through which the OTT connection passes are unaware of the routing of uplink and downlink communications. For example, network node 16 may not be aware of, or does not need to be aware of, the past routing of incoming downlink communications with data originating from the host computer 24 that should be forwarded (e.g., handed over) to the connected WD22a. Similarly, network node 16 does not need to be aware of the future routing of outgoing uplink communications originating from WD22a and destined for host computer 24.

[0097] The network node 16 is configured to include a configuration unit 32 configured to perform one or more network node 16 functions as described herein, such as with respect to multiburst tracking reference signal (TRS) measurement settings. The wireless device 22 is configured to include a measurement unit 34 configured to perform one or more wireless device 22 functions as described herein, such as with respect to multiburst tracking reference signal (TRS) measurement settings.

[0098] Next, an exemplary implementation of the WD22, network node 16, and host computer 24 discussed in the previous paragraph, according to one embodiment, will be described with reference to Figure 10. In the communication system 10, the host computer 24 comprises hardware (HW) 38, including a communication interface 40 configured to set up and maintain wired or wireless connections to the interfaces of different communication devices of the communication system 10. The host computer 24 further comprises a processing circuit 42 which may have memory and / or processing capabilities. The processing circuit 42 may include a processor 44 and memory 46. In detail, in addition to or instead of a processor and memory such as a central processing unit, the processing circuit 42 may comprise integrated circuits for processing and / or control, such as one or more processors and / or processor cores and / or FPGAs (field-programmable gate arrays) and / or ASICs (application-specific integrated circuits) adapted to execute instructions. The processor 44 may be configured to access memory 46 (for example, to write to memory 46 and / or read from memory 46), and memory 46 may comprise any kind of volatile and / or non-volatile memory, such as cache and / or buffer memory and / or RAM (random access memory) and / or ROM (read-only memory) and / or optical memory and / or EPROM (erasable programmable read-only memory).

[0099] The processing circuit 42 may be configured to control any of the methods and / or processes described herein, and / or to cause such methods and / or processes to be carried out, for example, by the host computer 24. The processor 44 corresponds to one or more processors 44 for carrying out the host computer 24 functions described herein. The host computer 24 includes memory 46 configured to store data, programmatic software code, and / or other information described herein. In some embodiments, the software 48 and / or host application 50 may include instructions that, when executed by the processor 44 and / or processing circuit 42, cause the processor 44 and / or processing circuit 42 to carry out the processes described herein with respect to the host computer 24. The instructions may be software related to the host computer 24.

[0100] Software 48 may be executable by processing circuit 42. Software 48 includes a host application 50. The host application 50 may be able to operate to provide services to remote users, such as a WD22 connected via an OTT connection 52 that terminates at the host computer 24. When providing services to remote users, the host application 50 may provide user data transmitted using the OTT connection 52. "User data" may be data and information as described herein as implementing the functions described. In one embodiment, the host computer 24 may be configured to provide control and functionality to a service provider and may be operated by or on behalf of the service provider. The processing circuit 42 of the host computer 24 may enable the host computer 24 to observe, monitor, and control the network node 16 and / or wireless device 22, transmit to the network node 16 and / or wireless device 22, and / or receive from the network node 16 and / or wireless device 22. The processing circuit 42 of the host computer 24 may include an information unit 54 configured to enable the service provider to perform one or more of the following actions related to the multiburst tracking reference signal (TRS) measurement settings: receiving, transmitting, forwarding, relaying, processing, storing, and analyzing information.

[0101] The communication system 10 further includes a network node 16 provided within the communication system 10, the network node 16 including hardware 58 that enables the network node 16 to communicate with the host computer 24 and WD22. The hardware 58 may include a communication interface 60 for setting up and maintaining wired or wireless connections with the interfaces of different communication devices of the communication system 10, and a wireless interface 62 for setting up and maintaining at least a wireless connection 64 with WD22 located in the coverage area 18 served by the network node 16. The wireless interface 62 may be formed as, for example, one or more RF transmitters, one or more RF receivers, and / or one or more RF transceivers, or may include them. The communication interface 60 may be configured to facilitate a connection 66 to the host computer 24. The connection 66 may be direct, or the connection 66 may pass through the core network 14 of the communication system 10 and / or one or more intermediate networks 30 outside the communication system 10.

[0102] In the embodiments shown, the hardware 58 of the network node 16 further includes a processing circuit 68. The processing circuit 68 may include a processor 70 and a memory 72. More specifically, in addition to, or instead of, a processor and memory such as a central processing unit, the processing circuit 68 may include an integrated circuit for processing and / or control, for example, one or more processors and / or processor cores and / or FPGAs (field-programmable gate arrays) and / or ASICs (application-specific integrated circuits) adapted to execute instructions. The processor 70 may be configured to access the memory 72 (e.g., write to and / or read from the memory 72), and the memory 72 may include any kind of volatile and / or non-volatile memory, for example, cache and / or buffer memory and / or RAM (random access memory) and / or ROM (read-only memory) and / or optical memory and / or EPROM (erasable programmable read-only memory).

[0103] Therefore, the network node 16 further has software 74 stored either internally in memory 72 or in external memory (e.g., a database, storage array, network storage device, etc.) accessible by the network node 16 via an external connection. The software 74 may be executable by processing circuit 68. Processing circuit 68 may be configured to control any of the methods and / or processes described herein, and / or to cause such methods and / or processes to be carried out by the network node 16, for example. Processor 70 corresponds to one or more processors 70 for carrying out the network node 16 functions described herein. Memory 72 is configured to store data, programmatic software code, and / or other information described herein. In some embodiments, the software 74 may include instructions that, when executed by the processor 70 and / or processing circuit 68, cause the processor 70 and / or processing circuit 68 to carry out the processes described herein with respect to the network node 16. For example, the processing circuit 68 of the network node 16 may include a configuration unit 32 configured to perform one or more network node 16 functions as described herein, such as with respect to multiburst tracking reference signal (TRS) measurement settings.

[0104] The communication system 10 further includes the WD22 already mentioned. The WD22 may have hardware 80 which may include a radio interface 82 configured to set up and maintain a radio connection 64 with a network node 16 serving the coverage area 18 in which the WD22 is currently located. The radio interface 82 may be formed as, for example, one or more RF transmitters, one or more RF receivers, and / or one or more RF transceivers, or may include them.

[0105] The WD22 hardware 80 further includes a processing circuit 84. The processing circuit 84 may include a processor 86 and memory 88. More specifically, in addition to or instead of a processor and memory such as a central processing unit, the processing circuit 84 may comprise an integrated circuit for processing and / or control, for example, one or more processors and / or processor cores and / or FPGAs (field-programmable gate arrays) and / or ASICs (application-specific integrated circuits) adapted to execute instructions. The processor 86 may be configured to access memory 88 (for example, to write to memory 88 and / or read from memory 88), and memory 88 may comprise any kind of volatile and / or non-volatile memory, for example, cache and / or buffer memory and / or RAM (random access memory) and / or ROM (read-only memory) and / or optical memory and / or EPROM (erasable programmable read-only memory).

[0106] Therefore, the WD22 may further include software 90, which may be stored, for example, in memory 88 in the WD22 or in external memory accessible by the WD22 (e.g., a database, storage array, network storage device, etc.). The software 90 may be executable by processing circuit 84. The software 90 may include a client application 92. The client application 92 may operate to provide services to human or non-human users via the WD22, with the support of a host computer 24. On the host computer 24, a running host application 50 may communicate with a running client application 92 via an OTT connection 52 that terminates in the WD22 and the host computer 24. When providing services to a user, the client application 92 may receive request data from the host application 50 and provide user data in response to the request data. The OTT connection 52 may transfer both the request data and the user data. The client application 92 may interact with the user to generate the user data that the client application 92 provides.

[0107] The processing circuit 84 may be configured to control any of the methods and / or processes described herein, and / or to have such methods and / or processes performed, for example, by the WD22. The processor 86 corresponds to one or more processors 86 for performing the WD22 functions described herein. The WD22 includes a memory 88 configured to store data, programmatic software code, and / or other information described herein. In some embodiments, the software 90 and / or client application 92 may include instructions that, when executed by the processor 86 and / or processing circuit 84, cause the processor 86 and / or processing circuit 84 to perform the processes described herein with respect to the WD22. For example, the processing circuit 84 of the wireless device 22 may include a measurement unit 34 configured for one or more wireless device 22 functions as described herein, such as with respect to a multiburst tracking reference signal (TRS) measurement setting.

[0108] In some embodiments, the internal workings of the network node 16, WD22, and host computer 24 may be as shown in Figure 10, and separately, the surrounding network topology may be as shown in Figure 9.

[0109] In Figure 10, the OTT connection 52 is depicted abstractly to illustrate communication between the host computer 24 and the wireless device 22 via the network node 16, without explicit reference to the intermediary devices and the precise routing of messages through these devices. The network infrastructure may determine the routing, and the network infrastructure may be configured to hide the routing from the WD22, the service provider operating the host computer 24, or both. While the OTT connection 52 is active, the network infrastructure may also make decisions to dynamically change the routing (for example, based on network load balancing considerations or reconfiguration).

[0110] The wireless connection 64 between WD22 and network node 16 follows the teachings of embodiments described throughout this disclosure. One or more of the various embodiments improve the performance of OTT services provided to WD22 using an OTT connection 52 in which the wireless connection 64 may form the final segment. More precisely, some teachings of these embodiments may improve data rate, latency, and / or power consumption, thereby providing benefits such as reduced user latency, relaxed file size limits, better responsiveness, and extended battery life.

[0111] In some embodiments, a measurement procedure may be provided for the purpose of monitoring data rate, latency, and other factors, which are improved in one or more embodiments. Further optional network functions may be provided for reconfiguring the OTT connection 52 between the host computer 24 and the WD22 in response to variations in the measurement results. The measurement procedure and / or network function for reconfiguring the OTT connection 52 may be implemented in the software 48 of the host computer 24 or in the software 90 of the WD22, or both. In embodiments, a sensor (not shown) may be deployed in or in relation to a communication device through which the OTT connection 52 passes, and the sensor may participate in the measurement procedure by supplying values ​​of the monitored quantities exemplified above, or values ​​of other physical quantities through which the software 48, 90 can calculate or estimate the monitored quantities. Reconfiguring the OTT connection 52 may include message formatting, retransmission settings, preferred routing, etc., and the reconfiguration may not need to affect the network node 16, and may be unknown to or imperceptible to the network node 16. Several such procedures and functions are known and practiced in the art. In some embodiments, the measurement may involve proprietary WD signaling that facilitates the measurement of the host computer 24, such as throughput, propagation time, and latency. In some embodiments, the measurement may be implemented in which software 48, 90 monitors propagation time, errors, etc., and software 48, 90 uses an OTT connection 52 to cause messages, in particular empty or "dummy" messages, to be sent.

[0112] Accordingly, in some embodiments, the host computer 24 includes a processing circuit 42 configured to provide user data and a communication interface 40 configured to forward the user data to the cellular network for transmission to the WD22. In some embodiments, the cellular network also includes a network node 16 having a radio interface 62. In some embodiments, the network node 16 is configured to perform the functions and / or methods described herein for preparing / starting / maintaining / supporting / terminating transmissions to the WD22 and / or preparing / terminating / maintaining / supporting / terminating transmissions from the WD22, and / or the processing circuit 68 of the network node 16 is configured to perform them.

[0113] In some embodiments, the host computer 24 includes a processing circuit 42 and a communication interface 40, the communication interface 40 being configured to receive user data originating from transmissions from the WD 22 to the network node 16. In some embodiments, the WD 22 includes a radio interface 82 and / or processing circuit 84 configured to perform and / or perform the functions and / or methods described herein for preparing / starting / maintaining / supporting / terminating transmissions to the network node 16 and / or preparing / terminating / maintaining / supporting / terminating transmissions from the network node 16.

[0114] Figures 9 and 10 show various "units," such as a configuration unit 32 and a measurement unit 34, which are located within their respective processors. These units can be implemented such that a portion of the unit is stored in corresponding memory within the processing circuit. In other words, the units can be implemented in hardware or as a combination of hardware and software within the processing circuit.

[0115] Figure 11 is a flowchart illustrating an exemplary method implemented in a communication system, such as the communication system in Figures 9 and 10, according to one embodiment. The communication system may include a host computer 24, a network node 16, and a WD22, which may be described with reference to Figure 10. In a first step of the method, the host computer 24 provides user data (block S100). In an optional substep of the first step, the host computer 24 provides user data by running a host application, such as host application 50 (block S102). In a second step, the host computer 24 initiates a transmission to carry the user data to the WD22 (block S104). In an optional third step, the network node 16 transmits the user data carried in the transmission initiated by the host computer 24 to the WD22, in accordance with the teachings of the embodiments described throughout this disclosure (block S106). In an optional fourth step, WD22 executes a client application, such as a client application 92, which is related to the host application 50 executed by the host computer 24 (block S108).

[0116] Figure 12 is a flowchart illustrating an exemplary method implemented in a communication system, such as the communication system of Figure 9, according to one embodiment. The communication system may include a host computer 24, a network node 16, and a WD22, which may be described with reference to Figures 9 and 10. In a first step of the method, the host computer 24 provides user data (block S110). In an optional substep (not shown), the host computer 24 provides user data by running a host application, such as host application 50. In a second step, the host computer 24 initiates a transmission to carry the user data to the WD22 (block S112). The transmission may proceed via the network node 16, as taught in the embodiments described throughout this disclosure. In an optional third step, the WD22 receives the user data carried in the transmission (block S114).

[0117] Figure 13 is a flowchart illustrating an exemplary method implemented in a communication system, such as the communication system in Figure 9, according to one embodiment. The communication system may include a host computer 24, a network node 16, and a WD 22, which may be described with reference to Figures 9 and 10. In an optional first step of the method, the WD 22 receives input data provided by the host computer 24 (block S116). In an optional substep of the first step, the WD 22 runs a client application 92, which provides user data in response to the received input data provided by the host computer 24 (block S118). In an optional second step, either additionally or alternatively, the WD 22 provides user data (block S120). In an optional substep of the second step, the WD provides user data by running a client application, such as the client application 92 (block S122). When providing user data, the runnable client application 92 may further consider user input received from the user. Regardless of the specific format in which the user data is provided, WD22 may initiate transmission of the user data to the host computer 24 in an optional third substep (block S124). In a fourth step of the method, the host computer 24 receives the user data transmitted from WD22 in accordance with the teachings of the embodiments described throughout this disclosure (block S126).

[0118] Figure 14 is a flowchart illustrating an exemplary method implemented in a communication system, such as the communication system in Figure 9, according to one embodiment. The communication system may include a host computer 24, a network node 16, and a WD22, which may be described with reference to Figures 9 and 10. In an optional first step of the method, the network node 16 receives user data from the WD22 (block S128), in accordance with the teachings of the embodiments described throughout this disclosure. In an optional second step, the network node 16 initiates a transmission of the received user data to the host computer 24 (block S130). In a third step, the host computer 24 receives the user data carried in the transmission initiated by the network node 16 (block S132).

[0119] Figure 15 is a flowchart of an exemplary process in a network node 16 according to some embodiments of the present disclosure. One or more blocks described herein may be implemented by one or more elements of the network node 16, such as by one or more of the processing circuit 68 (including the configuration unit 32), the processor 70, the radio interface 62 and / or the communication interface 60. The network node 16 is configured to configure the radio device 22 to perform time-domain channel property (TDCP) measurements based on a first trace reference signal (TRS) burst and a second TRS burst, as described herein (block S134). The network node 16 is configured to trigger the transmission of a first TRS burst and a second TRS burst, where the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic (block S136). Network node 16 is configured to receive instructions for configuration and TDCP measurement based on the first and second TRS bursts (block S138).

[0120] According to one or more embodiments, the TDCP measurement is set for a lag of a number of slots based on a first TRS burst and a second TRS burst. The number of slots may be predetermined or set, for example, by RRC signaling. The number of slots corresponding to a lag is also denoted herein as L.

[0121] According to one or more embodiments, a first TRS burst has a periodicity of P slots and a slot offset of S slots, a second TRS burst has a periodicity of N*P slots and a slot offset of S+L slots, and the TDCP measurement is a non-periodic TDCP measurement set up on the lag of L slots with a periodicity Q*P based on the first and second TRS bursts.

[0122] According to one or more embodiments, the first TRS burst has periodicity of P slots and slot offset of S slots, the second TRS burst has periodicity of Q*P slots and slot offset of S+L slots, and the TDCP measurement is set for the lag of L slots.

[0123] According to one or more embodiments, the trigger for aperiodic TDCP measurement is the next opportunity following a second TRS burst.

[0124] According to one or more embodiments, the first TRS burst is a periodic TRS, the second TRS burst is a non-periodic TRS, and the TDCP measurement is a non-periodic TDCP measurement set for the lags of L slots.

[0125] According to one or more embodiments, the trigger for TDCP measurement is a TRS burst separated by only L slots for any given occasion of a first TRS burst.

[0126] According to one or more embodiments, the first TRS burst and the second TRS burst are aperiodic TRS, and the TDCP measurement is aperiodic TDCP measurement set for the lag of L slots.

[0127] According to one or more embodiments, the trigger for aperiodic TDCP measurement is two TRS bursts separated by only L slots.

[0128] According to one or more embodiments, the first TRS burst and the second TRS burst are transmitted from the same antenna port.

[0129] According to one or more embodiments, the resources of the first TRS burst and the resources of the second TRS burst are pseudo-collocated.

[0130] According to one or more embodiments, the resources of the first TRS burst and the resources of the second TRS burst have the same time domain index and the same subcarrier index.

[0131] According to one or more embodiments, the first TRS burst and the second TRS burst are configured as part of different non-zero power (NZP) channel state information-reference signal (CSI-RS) resource sets, and as part of the same NZP CSI-RS resource set.

[0132] Figure 16 is a flowchart of an exemplary process in a wireless device 22 according to some embodiments of the present disclosure. One or more blocks described herein may be carried out by one or more elements of the wireless device 22, such as by one or more of the processing circuit 84 (including the measurement unit 34), the processor 86, the wireless interface 82 and / or the communication interface 60. The wireless device 22 is configured to receive (block S140) a first trace reference signal (TRS) burst and a second TRS burst to perform a time-domain channel property (TDCP) measurement based on a first trace reference signal (TRS) burst and a second TRS burst, as described herein. The wireless device 22 is configured to receive (block S142) a first TRS burst and a second TRS burst, wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic. The wireless device 22 is configured to perform TDCP measurements based on the settings and the first and second TRS bursts (block S144).

[0133] According to one or more embodiments, the TDCP measurement is set for a lag of a number of slots based on a first TRS burst and a second TRS burst. The number of slots may be predetermined or set, for example, by RRC signaling. The number of slots corresponding to a lag is also denoted herein as L.

[0134] According to one or more embodiments, a first TRS burst has a periodicity of P slots and a slot offset of S slots, a second TRS burst has a periodicity of N*P slots and a slot offset of S+L slots, and the TDCP measurement is a non-periodic TDCP measurement set up on the lag of L slots with a periodicity Q*P based on the first and second TRS bursts.

[0135] According to one or more embodiments, the first TRS burst has periodicity of P slots and slot offset of S slots, the second TRS burst has periodicity of Q*P slots and slot offset of S+L slots, and the TDCP measurement is set for the lag of L slots.

[0136] According to one or more embodiments, the trigger for aperiodic TDCP measurement is the next opportunity following a second TRS burst.

[0137] According to one or more embodiments, the first TRS burst is a periodic TRS, the second TRS burst is a non-periodic TRS, and the TDCP measurement is a non-periodic TDCP measurement set for the lags of L slots.

[0138] According to one or more embodiments, the trigger for TDCP measurement is a TRS burst separated by only L slots for any given occasion of a first TRS burst.

[0139] According to one or more embodiments, the first TRS burst and the second TRS burst are aperiodic TRS, and the TDCP measurement is aperiodic TDCP measurement set for the lag of L slots.

[0140] According to one or more embodiments, the trigger for aperiodic TDCP measurement is two TRS bursts separated by only L slots.

[0141] According to one or more embodiments, it is assumed that the first TRS burst and the second TRS burst are transmitted from the same antenna port.

[0142] According to one or more embodiments, the resources of the first TRS burst and the resources of the second TRS burst are assumed to be pseudo-collocated.

[0143] According to one or more embodiments, the resources of the first TRS burst and the resources of the second TRS burst have the same time domain index and the same subcarrier index.

[0144] According to one or more embodiments, the first TRS burst and the second TRS burst are configured as part of different non-zero power (NZP) channel state information-reference signal (CSI-RS) resource sets, and as part of the same NZP CSI-RS resource set.

[0145] Having described the general process flow of the configuration of this disclosure and provided examples of hardware and software configurations for implementing the processes and functions of this disclosure, the following sections provide configuration details and examples for multiburst tracking reference signal (TRS) measurement setups.

[0146] Some embodiments provide a multiburst tracking reference signal (TRS) measurement configuration. One or more network node 16 functions described below may be implemented by one or more of the processing circuit 68, processor 70, configuration unit 32, etc. One or more wireless device 22 functions described below may be implemented by one or more of the processing circuit 84, processor 86, measurement unit 34, etc.

[0147] A schematic description of several embodiments Periodic TDCP measurement based on periodic TRS (Embodiment 1) • Set up two TRS. 〇 TRS1 with P periodic slots and S slot offset slots 〇 TRS2 with periodic N*P slots and slot offset S+L slots Based on TRS1 and TRS2, set up periodic TDCP measurements for the lags of L slots in periodic Q*P.

[0148] Figure 17 is a diagram of an example of Embodiment 1.

[0149] Non-periodic TDCP measurement based on periodic TRS (Embodiment 2) • Set up two TRS. 〇 TRS1 with P periodic slots and S slot offset slots 〇 TRS2 with periodic Q*P slots and slot offset S+L slots • Set up aperiodic TDCP measurements for the lag of L slots. • Trigger aperiodic TDCP measurement for the next TRS2 opportunity.

[0150] Aperiodic TDCP measurement based on one periodic TRS and one aperiodic TRS (Embodiment 3) • Set one periodic TRS. • Set up one non-periodic TRS. • Set up aperiodic TDCP measurements for the lag of L slots. • Trigger ○ For a given occasion of periodic TRS, one TRS burst is isolated into L slots. ○ TDCP measurement for L slot lags, based on the chances of triggered aperiodic TRS bursts and periodic TRS separated from aperiodic TRS by only L slots.

[0151] Non-periodic TDCP measurement based on non-periodic TRS (Embodiment 4) • Set a non-periodic TRS • Set up aperiodic TDCP measurements for the lag of L slots. • Trigger 〇 Two TRS bursts separated in time by only L slots ○ TDCP measurement for L slot lags based on two triggered TRS bursts

[0152] Embodiment 1: Periodic TDCP measurement based on periodic TRS In this embodiment, periodic TDCP measurement is performed based on two bursts of periodic TRS. An example of using two bursts of periodic TRS for periodic TDCP measurement is shown in Figure 18.

[0153] In Figure 18, TRS1 represents a first TRS burst consisting of four TRS resources in two consecutive slots (note that in NR, the four TRS resources are four NZP CSI-RS resources in an NZP-CSI-RS resource set with "trs-info" set to the value "true", as defined in 3GPP standards such as 3GPP TS38.331 V17.3.0). While Figure 18 shows the first TRS burst TRS1 extending across two consecutive slots, in another case, the first TRS burst TRS1 may consist of two TRS resources in a single slot. All TRS resources within the first TRS burst are configured with periodic P slots and slot offset S slots.

[0154] TRS2 represents a second TRS burst consisting of four TRS resources in two slots. Figure 18 shows the second TRS burst TRS2 extending across two consecutive slots, but in other cases, the second TRS burst TRS2 may consist of two TRS resources in a single slot. All TRS resources within the second TRS burst are assigned a periodic Q × P slots and a slot offset of S + L slots, where Q is a positive integer. Note that the relative slot offset between TRS burst 1 and TRS burst 2 is given by L slots.

[0155] In this embodiment, the wireless device 22 is configured to perform periodic TDCP measurements for the delay τ of L slots based on TRS1 and TRS2. When time-domain correlation is used as the TDCP measurement, the time-domain correlation is calculated using at least one of the following: • Received frequency domain TRS samples TIFF2026514294000024.tif6170 was measured from the first TRS burst TRS1, where the time domain sample index m=1,...,M and the subcarrier index n=0,...,N-1, and • Received frequency domain TRS samples TIFF2026514294000025.tif6170 was measured from the second TRS burst TRS2, where the time domain sample index m=1,...,M and the subcarrier index n=0,...,N-1.

[0156] In one embodiment, the delay value τ=L to be used to calculate the time-domain correlation may be explicitly set in the CSI reporting settings. In some other embodiments, the delay value τ=L may be implicitly given by the relative slot offset between the first TRS burst and the second TRS burst (for example, the relative slot offset between the first TRS resource in the first TRS burst and the first TRS resource in the second TRS burst).

[0157] In another embodiment, periodic TDCP measurements are performed for every Q × P slots. The periodicity of the TDCP measurements can be explicitly set in the CSI reporting configuration (e.g., CSI-ReportConfig) or the CSI resource configuration (CSI-ResourceConfig). Alternatively, the periodicity of the TDCP measurements can be implicitly given by the periodicity of the second TRS burst TRS2.

[0158] In another embodiment, it is assumed that the TRS resources in the first TRS burst and the TRS resources in the second TRS burst are transmitted from the same antenna port by the wireless device 22 in order to measure the autocorrelation corresponding to the same antenna port at two different delay or lag values. Therefore, in order to support the TDCP measurement features, the following restrictions may be added to 3GPP TS38.214. - When the upper-layer parameter trs-Info in CSI-ResourceConfig is set for two NZP-CSI-RS-ResourceSets, the wireless device shall, or may, assume that the antenna ports with the same port index for the configured NZP CSI-RS resources in the two NZP-CSI-RS-ResourceSets are the same.

[0159] In some other embodiments, it is assumed that the TRS resources in the first TRS burst and the TRS resources in the second TRS burst are pseudo-collocated (i.e., they have the same pseudo-collocation source reference signal).

[0160] In one embodiment, two different TRS bursts may be configured as different NZP-CSI-RS resource sets, both containing the truly set upper-layer parameter "trs-info". Thus, two periodic NZP CSI-RS resource sets corresponding to the first and second TRS bursts may be configured in CSI-ResourceConfig (or alternatively, CSI resource setting). In NRs up to release 17 (e.g., 3GPP release 17), when the upper-layer parameter groupBasedBeamReporting-r17 is set on the radio device 22, only two NZP CSI-RS resource sets are allowed for the periodic CSI resource setting. 3GPP TS38.214 V17.4.0 (section 5.2.1.2) has the following limitations: - For periodic and semi-persistent CSI resource settings, when groupBasedBeamReporting-r17 is configured on the wireless device 22, the number of CSI resource sets configured is S=2, and in other cases, the number of CSI-RS resource sets configured is limited to S=1.

[0161] The groupBasedBeamReporting-r17 feature is used separately for Layer 1 RSRP (L1-RSRP) calculations on two NZP CSI-RS resource sets, and separate L1-RSRP calculations are reported within the group.

[0162] To distinguish the periodic TDCP measurement feature from the "groupBasedBeamReporting-r17" feature, the higher-layer parameter "periodicTdcpReporting" may be set in the higher layer of the wireless device 22. In one embodiment, this higher-layer parameter may be set in CSI-ReportConfig. In another embodiment, this higher-layer parameter may be set in the CSI-ResourceConfig information element or in the NZP CSI-RS resource set.

[0163] The following changes are required to support the periodic TDCP reporting features in 3GPP TS38.214.

[0164] 5.2.1.2 Resource Settings (from 3GPP TS38.214 V17.4.0) Each CSI resource setting CSI-ResourceConfig contains a setting for a list of S ≥ 1 CSI resource sets (given by the higher-layer parameter csi-RS-ResourceSetList), where the list consists of references to either or both (one or more) NZP CSI-RS resource sets and (one or more) SS / PBCH block sets, or the list consists of references to (one or more) CSI-IM resource sets. Each CSI resource setting resides in a DL BWP identified by the higher-layer parameter BWP-id, and all CSI resource settings linked to a CSI reporting setting have the same DL BWP.

[0165] The time-domain behavior of CSI-RS resources within a CSI resource setting is indicated by the higher-layer parameter resourceType and can be set to aperiodic, periodic, or semi-persistent. For periodic and semi-persistent CSI resource settings, when groupBasedBeamReporting-r17 or periodicTdcpReporting-r18 is set on the wireless device 22, the number of CSI resource sets set is S=2; otherwise, the number of CSI-RS resource sets set is limited to S=1. For periodic and semi-persistent CSI resource settings, the set periodicity and slot offset are given in the numerology of the associated DL BWP, as given by the BWP-id. When multiple CSI-ResourceConfigs consisting of the same NZP CSI-RS resource ID are set on the wireless device 22, the same time-domain behavior is assumed to be set, or may be set, for the CSI-ResourceConfigs. When multiple CSI-ResourceConfigs consisting of the same CSI-IM resource ID are configured on the wireless device 22, the same time-domain behavior shall be configured for the CSI-ResourceConfigs. All CSI resource settings linked to the CSI reporting setting shall have, or may have, the same time-domain behavior.

[0166] Embodiment 2: Non-periodic TDCP measurement based on periodic TRS In this embodiment, aperiodic TDCP measurement is performed based on two bursts of periodic TRS. An example of using two bursts of periodic TRS for aperiodic TDCP measurement is shown in Figure 19. The settings for the two periodic TRS are the same as in Embodiment 1. However, the TDCP measurement in this embodiment is aperiodic and is triggered via DCI (e.g., having format 0_1 ​​or 0_2). As shown in Figure 19, in one embodiment, DCI triggers aperiodic TDCP measurement (e.g., autocorrelation with delay or lag values ​​for L slots using TRS1 and TRS2), and wireless device 22 measures TDCP measurements for the next TRS1 opportunity and the next TRS2 opportunity. In an alternative embodiment, wireless device 22 may calculate or update TDCP measurements for every Q × P slots and report the calculated / updated TDCP measurements upon receiving a DCI trigger. The calculated / updated TDCP measurements are reported in a PUSCH triggered by DCI.

[0167] To trigger aperiodic TDCP measurements, the CSI-AperiodicTriggerStateList information element in 3GPP TS38.331 may be modified as described below and / or as indicated in bold below. A first TRS burst may be set via the NZP CSI-RS resource set parameter resourceSet under CSI-AssociatedReportConfigInfo->resourcesForChannel. A second TRS burst may be set via the NZP CSI-RS resource set parameter resourceSet2-r17 under CSI-AssociatedReportConfigInfo->resourcesForChannel2-r17. Note that in NR rel-17, the parameter resourceSet2-r17 is set for the Rel-17 groupBasedBeamReporting-r17 feature. However, unlike other settings for this feature, in one or more embodiments, the wireless device 22 is set to the upper layer parameter aperiodicTdcpReporting-r18 as shown below. Therefore, when the parameter aperiodicTdcpReporting-r18 is set, the wireless device 22 calculates aperiodic TDCP measurements using the first TRS burst in AssociatedReportConfigInfo->resourcesForChannel->resourceSet and the second TRS burst in CSI-AssociatedReportConfigInfo->resourcesForChannel2-r17->resourceSet2-r17. When the parameter aperiodicTdcpReporting-r18 is set (for example, set to "enabled"), the wireless device 22 does not calculate aperiodic TDCP measurements and follows the release 17 behavior for group-based beam reporting (i.e., calculates L1-RSRP for resourceSet1 and resourceSet2).

[0168] In an alternative embodiment, instead of reusing AssociatedReportConfigInfo->resourcesForChannel2-r17->resourceSet2-r17, a resource set specific to the second TRS burst may be configured separately.

[0169] In one embodiment, as described above, qcl-info2-r17 is omitted because when aperiodicTdcpReporting-r18 is set to enabled, the TRS resources need to be pseudo-collocated in resourceSet1 and resourceSet2. Therefore, in this embodiment, the TRS resources in both resourceSet1 and resourceSet2 follow the pseudo-collocation information provided by the higher-layer parameter qcl-info shown below.

[0170] CSI-AperiodicTriggerStateList information element TIFF2026514294000026.tif237170TIFF2026514294000027.tif252170

[0171] Embodiment 3: Aperiodic TDCP measurement based on one periodic TRS and one aperiodic TRS In this embodiment, the aperiodic TDCP measurement is performed based on one burst of periodic TRS and another burst of aperiodic TRS. An example of using one periodic TRS burst and one aperiodic TRS burst for the aperiodic TDCP measurement is shown in Figure 20. The setting of the periodic TRS burst TRS1 is the same as in Embodiment 1. However, in this case, the second TRS burst is aperiodic, and in this embodiment, the TDCP measurement is also aperiodic. Both the second burst of TRS (e.g., TRS2) and the aperiodic TDCP measurement are triggered via DCI (e.g., having format 0_1 ​​or 0_2). As shown in Figure 20, in one embodiment, DCI triggers a non-periodic TDCP measurement (e.g., autocorrelation with delay or lag values ​​for L slots using TRS1 and TRS2) along with a non-periodic second TRS burst TRS2, and wireless device 22 measures the TDCP measurement for the nearest preceding TRS1 opportunity and the triggered non-periodic TRS2 opportunity. The calculated / updated TDCP measurement is reported in the PUSCH triggered by DCI.

[0172] Since the two TRS bursts have different time-domain behaviors (i.e., one is periodic and the other is aperiodic), in one embodiment, two different CSI-ResourceConfigs (i.e., CSI resource settings or CSI resource configurations) may need to be linked to a single CSI-Report configuration in the modified CSI-ReportConfig information element, as shown below. This is because the time-domain behavior for TRS is defined at the CSI-Resource Config level. The first TRS burst corresponds to the NZP CSI-RS resource set configured in the CSI-ResourceConfig pointed to by the identifier resourcesForChannelMeasurement. The second TRS burst corresponds to the NZP CSI-RS resource set configured in the CSI-ResourceConfig pointed to by the identifier resourcesForChannelMeasurement2.

[0173] CSI-ReportConfig Information Element TIFF2026514294000028.tif113170

[0174] The modifications required to the CSI-AperiodicTriggerStateList information element to enable this embodiment are the same as those in Embodiment 2.

[0175] Embodiment 4: Aperiodic TDCP measurement based on two aperiodic TRS In this embodiment, aperiodic TDCP measurement is performed based on two bursts of aperiodic TRS. An example of using two aperiodic TRS bursts for aperiodic TDCP measurement is shown in Figure 21. In this embodiment, the first and second bursts of TRS (e.g., TRS1 and TRS2) and the aperiodic TDCP measurement are triggered via the same DCI (e.g., having format 0_1 ​​or 0_2). As shown in Figure 21, in one embodiment, the DCI triggers aperiodic TDCP measurement (e.g., autocorrelation with delay or lag values ​​for L slots, using TRS1 and TRS2) along with the first TRS burst TRS1 and the second TRS burst TRS2. The wireless device 22 measures the TDCP measurement for the triggered aperiodic TRS1 and TRS2 opportunities. The calculated / updated TDCP measurement is reported in the PUSCH triggered by the DCI.

[0176] Alternative Embodiment for Setting Up TDCP Measurement with Multiple TRS Bursts / Lags In the previous embodiment, it is assumed that different TRS bursts are configured as part of different NZP CSI-RS resource sets. In the alternative embodiment, multiple TRS bursts corresponding to different delays (or lags) are configured within a single NZP CSI-RS resource set. In the first example, the two TRS bursts in Figure 18 are multiple configured NZP CSI-RS resources within a single NZP CSI-RS resource set with truly configured "trs-info", as follows: • One or more NZP CSI-RS resources corresponding to the first TRS burst (for example, TRS1 in Figure 18) are configured with P periodic slots and S slot offset slots. If the first TRS burst extends across two slots, the NZP CSI-RS resource in the first slot of the first TRS burst will have S slot offset slots, and the NZP CSI-RS resource in the second slot of the first TRS burst will have S+1 slot offset slots. • One or more NZP CSI-RS resources corresponding to a second TRS burst (for example, TRS2 in Figure 18) are configured with a periodic Q × P slots and slot offset S slots. If the second TRS burst extends across two slots, the NZP CSI-RS resource in the first slot of the second TRS burst will have slot offset S + L slots, and the NZP CSI-RS resource in the second slot of the second TRS burst will have slot offset S + L + 1 slots.

[0177] If each TRS burst extends across R>2 slots, this embodiment can be extended by setting up R>2 groups of NZP CSI-RS resources, where the slot offsets of the NZP CSI-RS resources in the r(r=1,2,...,R) group are This will be the TIFF2026514294000029.tif6170 slot. Note that each of the R groups may consist of one or more NZP CSI-RS resources. Here, TIFF2026514294000030.tif6170 Depends on the number of TRS bursts (for example, in the case of the first TRS burst) TIFF2026514294000031.tif6170

[0178] In some embodiments, the delay or lag value L to be considered for TDCP measurement may be set as part of the NZP CSI-RS resource set. In another embodiment, a flag parameter "tdcpMeasurement" may be set in the NZP CSI-RS resource set to distinguish an NZP CSI-RS resource set containing TRS resources corresponding to multiple TRS bursts from other types of NZP CSI-RS resource sets (for example, an NZP CSI-RS resource set containing NZP CSI-RS resources for CSI measurement / reporting).

[0179] The above alternative embodiments can also be extended to the example in Figure 19.

[0180] In another alternative embodiment, instead of configuring multiple CSI-RS resources or sets of CSI-RS resources for different TRS bursts and associating them with TDCP reporting, as described in Embodiments 1 to 4, one (or more) additional lag / (one or more) burst offsets are added to the TRS(CSI-RS) configuration so that only one CSI-RS resource or set of CSI-RS resources is associated with TDCP measurement reporting.

[0181] In one or more embodiments, for periodic / aperiodic TDCP measurement reports related to (one or more) periodic TRSs, the scenario is similar to those shown in embodiments 1 and 2, except for the configuration part. In the following example, PeriodicityAndOffset2 is added to the NZP-CSI-RS-ResourceSet IE. This alternative form corresponds to a case where a single NZP CSI-RS resource is used for different TRS bursts, where different periodicity and offset values ​​are set for each of the TRS bursts. In other words, different instances (or repetitions) of the same NZP CSI-RS resource are used to represent different TRS bursts.

[0182] An example RRC configuration with changes shown in bold: TIFF2026514294000032.tif136170

[0183] Another extension of this alternative embodiment of using a single NZP CSI-RS resource to represent different TRS bursts is to set an offset between a first TRS burst and a second TRS burst by adding the TDCPAdditionalOffset parameter, as described below, whose value is numerology-dependent. TIFF2026514294000033.tif134170

[0184] In another alternative embodiment, for aperiodic TDCP measurement reporting related to aperiodic TRS, the scenario is similar to those shown in Figures 20 and 21 of Embodiments 3 and 4, respectively. In the following exemplary setting, aperiodicTriggeringOffset-r18 may be used to indicate the offset between the first TRS burst and the second TRS burst, as indicated by bold.

[0185] NZP-CSI-RS-ResourceSet Information Element TIFF2026514294000034.tif104170TIFF2026514294000035.tif245170

[0186] Other Embodiments In one additional embodiment for Embodiments 1 to 4, the two TRS (or CSI-RS) settings related to TDCP measurement are expected to have the same bandwidth (with the same RB position) and a power offset of NZP-CSI-RS RE to SSS RE.

[0187] Therefore, one or more embodiments provide a flexible way to trigger TDCP measurement at a desired delay or lag value. At the same time, one or more embodiments keep TRS overhead low compared to existing solutions.

[0188] The embodiments presented herein cover TDCP measurements using two TRS bursts separated by a slot offset L, but the embodiments may be extended to cover TDCP measurements using three or more TRS bursts.

[0189] For example, if S TRS bursts corresponding to different delays or lags are to be used for TDCP measurement, in some embodiments, S different NZP CSI-RS resource sets may be configured. Each of the S different NZP CSI-RS resource sets corresponding to different TRS bursts may be configured with a different slot offset value, each slot offset value corresponding to the delay or lag to be assumed for TDCP measurement.

[0190] In another embodiment, if S TRS bursts corresponding to different delays or lags should be used for TDCP measurement, then S different groups of NZP CSI-RS resources within a single NZP CSI-RS resource set may be configured. Each of the S different groups of NZP CSI-RS resources corresponding to different TRS bursts may be configured with a different slot offset value, each slot offset value corresponding to the delay or lag to be assumed for TDCP measurement.

[0191] As will be understood by those skilled in the art, the concepts described herein may be embodied as methods, data processing systems, computer program products, and / or computer storage media for storing executable computer programs. Accordingly, the concepts described herein may take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware embodiments, all of which may be generally referred to herein as “circuits” or “modules.” Any process, step, action, and / or function described herein may be carried out by and / or associated with a corresponding module, which may be implemented in software and / or firmware and / or hardware. Furthermore, this disclosure may take the form of a computer program product on a tangible computer-readable storage medium having computer program code embodied in a medium that can be executed by a computer. Any suitable tangible computer-readable medium may be used, including hard disks, CD-ROMs, electronic storage devices, optical storage devices, or magnetic storage devices.

[0192] Several embodiments have been described herein with reference to flowcharts and / or block diagrams illustrating methods, systems, and computer program products. It will be understood that each block in a flowchart and / or block diagram, as well as combinations of blocks in a flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, a dedicated computer, or other programmable data processing device for creating a machine (thereby creating a dedicated computer), and so those instructions executed via the processor of the computer or other programmable data processing device create means for implementing a function / action specified in one or more blocks of a flowchart and / or block diagram.

[0193] These computer program instructions may also be stored in computer-readable memory or storage medium that can instruct a computer or other programmable data processing device to function in a particular manner, and so the instructions stored in computer-readable memory may produce a product that includes instruction means for implementing a function / action specified in one or more blocks of a flowchart and / or block diagram.

[0194] Computer program instructions can also be loaded into a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device in order to create a computer implementation process; therefore, instructions executed on a computer or other programmable device provide steps for implementing a function / action specified in one or more blocks of a flowchart and / or block diagram.

[0195] It should be understood that the functions / actions mentioned within a block may occur in a different order than those shown in the illustrative diagram of the operation. For example, depending on the functions / actions involved, two blocks shown consecutively may, in effect, be executed substantially concurrently, or blocks may sometimes be executed in reverse order. Some of the diagrams include arrows on the communication path to indicate the primary direction of communication, but it should be understood that communication may occur in the opposite direction to the illustrated arrows.

[0196] Computer program code for performing the operations of the concepts described herein may be written in an object-oriented programming language such as Python, Java®, or C++. However, computer program code for performing the operations of the disclosure may also be written in a conventional procedural programming language such as the C programming language. The program code may run entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer. In the latter scenario, the remote computer may be connected to the user's computer through a local area network (LAN) or wide area network (WAN), or the connection may be made to an external computer (for example, via the Internet using an Internet service provider).

[0197] Many different embodiments have been disclosed herein in relation to the above description and drawings. It will be understood that a literal description and illustration of every combination and partial combination of these embodiments would be excessively repetitive and obscure. Therefore, all embodiments may be combined in some way and / or in combination, and this specification, including the drawings, should be construed as constituting a complete written description of all combinations and partial combinations of the embodiments described herein, and all combinations and partial combinations of the modes and processes of making and using them, and shall support any claims for any such combination or partial combination.

[0198] It will be understood by those skilled in the art that the embodiments described herein are not limited to those specifically shown and described herein. Furthermore, it should be noted that not all of the accompanying drawings are to a single scale unless otherwise stated above. Various modifications and variations are possible in light of the above teachings.

[0199] In view of the foregoing, embodiments of this disclosure include the following:

[0200] Embodiment A1. A network node configured to communicate with a wireless device, wherein the network node is Configuring the wireless device to perform time-domain channel property (TDCP) measurements based on a first tracking reference signal (TRS) burst and a second TRS burst, To cause the transmission of a first TRS burst and a second TRS burst, wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, Receiving instructions for setting and TDCP measurement based on the first and second TRS bursts. A network node having a wireless interface configured to perform and / or configured to do so, and / or having processing circuitry configured to do so.

[0201] Embodiment A2. The network node according to Embodiment A1, wherein TDCP measurement is set for a predetermined number of lags in the slots based on a first TRS burst and a second TRS burst.

[0202] Embodiment A3. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has periodicity of N*P slots and slot offset of S+L slots, The TDCP measurement is a non-periodic TDCP measurement set up for the lag of L slots with periodic Q*P based on the first TRS burst and the second TRS burst. A network node as described in Embodiment A1.

[0203] Embodiment A4. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has a periodicity of Q*P slots and a slot offset of S+L slots, TDCP measurement is set for the lag of L slots, A network node as described in Embodiment A1.

[0204] Embodiment A5. The network node according to Embodiment A4, wherein the trigger for aperiodic TDCP measurement is the next opportunity of a second TRS burst.

[0205] Embodiment A6. The first TRS burst is a periodic TRS. The second TRS burst is a non-periodic TRS. TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. A network node as described in Embodiment A1.

[0206] Embodiment A7. The network node according to Embodiment A6, wherein the trigger for TDCP measurement is a TRS burst isolated by only L slots for any occasion of the first TRS burst.

[0207] Embodiment A8. The first TRS burst and the second TRS burst are aperiodic TRS. TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. A network node as described in Embodiment A1.

[0208] Embodiment A9. The network node according to Embodiment A8, wherein the trigger for aperiodic TDCP measurement is two TRS bursts separated by only L slots.

[0209] Embodiment A10. The first TRS burst and the second TRS burst are Different Non-Zero Power (NZP) Channel State Information - As part of the Reference Signal (CSI-RS) resource set, and As part of the same NZP CSI-RS resource set, A network node according to any one of embodiments A1 to A9, configured in one of the following ways.

[0210] Embodiment B1. A method implemented by a network node configured to communicate with a wireless device, wherein the method is: Configuring the wireless device to perform time-domain channel property (TDCP) measurements based on a first tracking reference signal (TRS) burst and a second TRS burst, To cause the transmission of a first TRS burst and a second TRS burst, wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, Receiving instructions for setting and TDCP measurement based on the first and second TRS bursts. Methods that include...

[0211] Embodiment B2. The method according to Embodiment B1, wherein the TDCP measurement is set for a predetermined number of lags of slots based on a first TRS burst and a second TRS burst.

[0212] Embodiment B3. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has periodicity of N*P slots and slot offset of S+L slots, The TDCP measurement is a non-periodic TDCP measurement set up for the lag of L slots with periodic Q*P based on the first TRS burst and the second TRS burst. The method described in Embodiment B1.

[0213] Embodiment B4. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has a periodicity of Q*P slots and a slot offset of S+L slots, TDCP measurement is set for the lag of L slots, The method described in Embodiment B1.

[0214] Embodiment B5. The method according to Embodiment B4, wherein the trigger for aperiodic TDCP measurement is the next opportunity of the second TRS burst.

[0215] Embodiment B6. The first TRS burst is a periodic TRS. The second TRS burst is a non-periodic TRS. TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. The method described in Embodiment B1.

[0216] Embodiment B7. The method according to embodiment B6, wherein the trigger for TDCP measurement is a TRS burst separated by L slots for an occasion with a first TRS burst.

[0217] Embodiment B8. The first TRS burst and the second TRS burst are aperiodic TRSs, and the TDCP measurement is an aperiodic TDCP measurement set for a lag of L slots, The method according to embodiment B1.

[0218] Embodiment B9. The method according to embodiment B8, wherein the trigger for aperiodic TDCP measurement is two TRS bursts separated by L slots.

[0219] Embodiment B10. The first TRS burst and the second TRS burst are as part of different non-zero power (NZP) channel state information-reference signal (CSI-RS) resource sets, and as part of the same NZP CSI-RS resource set, and is set by one of them, the method according to any one of embodiments B1 to B9.

[0220] Embodiment C1. A wireless device configured to communicate with a network node, wherein the WD receives a setting for performing a time domain channel property (TDCP) measurement based on a first tracking reference signal (TRS) burst and a second TRS burst, receives the first TRS burst and the second TRS burst, wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, performs a TDCP measurement based on the setting and the first TRS burst and the second TRS burst, and A wireless device configured to perform and / or comprising such a configured wireless interface and / or processing circuitry.

[0221] Embodiment C2. The wireless device according to embodiment C1, wherein the TDCP measurement is set for a predefined number of lags of slots based on a first TRS burst and a second TRS burst.

[0222] Embodiment C3. The first TRS burst has a periodicity of P slots and a slot offset of S slots, the second TRS burst has a periodicity of N*P slots and a slot offset of S+L slots, and the TDCP measurement is an aperiodic TDCP measurement set for lags of L slots with a periodicity of Q*P based on the first TRS burst and the second TRS burst. The wireless device according to embodiment C1.

[0223] Embodiment C4. The first TRS burst has a periodicity of P slots and a slot offset of S slots, the second TRS burst has a periodicity of Q*P slots and a slot offset of S+L slots, and the TDCP measurement is set for lags of L slots. The wireless device according to embodiment C1.

[0224] Embodiment C5. The wireless device according to embodiment C4, wherein the trigger for the aperiodic TDCP measurement is the next opportunity of the second TRS burst.

[0225] Embodiment C6. The first TRS burst is a periodic TRS, the second TRS burst is an aperiodic TRS, and the TDCP measurement is an aperiodic TDCP measurement set for lags of L slots. The wireless device according to embodiment C1.

[0226] Embodiment C7. The wireless device according to Embodiment C6, wherein the trigger for TDCP measurement is a TRS burst separated by only L slots for any occasion of the first TRS burst.

[0227] Embodiment C8. The first TRS burst and the second TRS burst are aperiodic TRS. TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. A wireless device according to Embodiment C1.

[0228] Embodiment C9. The wireless device according to Embodiment C8, wherein the trigger for aperiodic TDCP measurement is two TRS bursts separated by only L slots.

[0229] Embodiment C10. The first TRS burst and the second TRS burst are Different Non-Zero Power (NZP) Channel State Information - As part of the Reference Signal (CSI-RS) resource set, and As part of the same NZP CSI-RS resource set, A wireless device according to any one of embodiments C1 to C9, configured in one of the following ways.

[0230] Embodiment D1. A method implemented by a wireless device configured to communicate with a network node, wherein the method is: Receiving settings for performing time-domain channel property (TDCP) measurements based on a first tracking reference signal (TRS) burst and a second TRS burst, Receiving a first TRS burst and a second TRS burst, wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, TDCP measurements are performed based on the settings and the first and second TRS bursts. A method comprising

[0231] Embodiment D2. The method according to embodiment D1, wherein the TDCP measurement is set for a predefined number of lags of slots based on a first TRS burst and a second TRS burst.

[0232] Embodiment D3. The first TRS burst has a periodicity of P slots and a slot offset of S slots, the second TRS burst has a periodicity of N*P slots and a slot offset of S+L slots, and the TDCP measurement is an aperiodic TDCP measurement set for lags of L slots with a periodicity of Q*P based on the first TRS burst and the second TRS burst. The method according to embodiment D1.

[0233] Embodiment D4. The first TRS burst has a periodicity of P slots and a slot offset of S slots, the second TRS burst has a periodicity of Q*P slots and a slot offset of S+L slots, and the TDCP measurement is set for lags of L slots. The method according to embodiment D1.

[0234] Embodiment D5. The method according to embodiment D4, wherein the trigger for the aperiodic TDCP measurement is the next opportunity of the second TRS burst.

[0235] Embodiment D6. The first TRS burst is a periodic TRS, the second TRS burst is an aperiodic TRS, and the TDCP measurement is an aperiodic TDCP measurement set for lags of L slots. The method according to embodiment D1.

[0236] Embodiment D7. The method according to Embodiment D6, wherein the trigger for TDCP measurement is a TRS burst separated by only L slots for one occasion of the first TRS burst.

[0237] Embodiment D8. The first TRS burst and the second TRS burst are aperiodic TRS. TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. The method according to Embodiment D1.

[0238] Embodiment D9. The method according to Embodiment D8, wherein the trigger for aperiodic TDCP measurement is two TRS bursts separated by only L slots.

[0239] Embodiment D10. The first TRS burst and the second TRS burst are Different Non-Zero Power (NZP) Channel State Information - As part of the Reference Signal (CSI-RS) resource set, and As part of the same NZP CSI-RS resource set, The method according to any one of embodiments D1 to D9, set in one of the following:

Claims

1. A method implemented by a wireless device (22; 22a, 22b), wherein the method is Receiving settings for performing time-domain channel property (TDCP) measurements based on a first tracking reference signal (TRS) burst and a second TRS burst (S140), Receiving the first TRS burst and the second TRS burst (S142), wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, Perform the TDCP measurement based on the above settings and the first TRS burst and the second TRS burst (S144) Methods that include...

2. The method according to claim 1, wherein the TDCP measurement is set for a lag of the number of slots based on the first TRS burst and the second TRS burst.

3. The method according to claim 2, wherein the number of slots is set by wireless resource control signaling.

4. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has periodicity of N*P slots and slot offset of S+L slots, The TDCP measurement is a non-periodic TDCP measurement set up with periodic Q*P for the lag of L slots based on the first TRS burst and the second TRS burst. The method according to claim 1.

5. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has a periodicity of Q*P slots and a slot offset of S+L slots, The TDCP measurement described above is set for the lags of L slots. The method according to claim 1.

6. The method according to claim 5, wherein the trigger for the non-periodic TDCP measurement is the next opportunity of the second TRS burst.

7. The first TRS burst is periodic, The second TRS burst is aperiodic, The TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. The method according to claim 1.

8. The method according to claim 7, wherein the trigger for the TDCP measurement is a TRS burst separated by L slots for any given occasion of the first TRS burst.

9. The first TRS burst and the second TRS burst are aperiodic, The TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. The method according to claim 1.

10. The method according to claim 9, wherein the trigger for aperiodic TDCP measurement is two TRS bursts separated by L slots.

11. The method according to any one of claims 1 to 10, wherein it is assumed that the first TRS burst and the second TRS burst are transmitted from the same antenna port.

12. The method according to any one of claims 1 to 11, wherein the resources of the first TRS burst and the resources of the second TRS burst are assumed to be pseudo-collocated.

13. The method according to any one of claims 1 to 11, wherein the first TRS burst resource and the second TRS burst resource have the same time domain index and the same subcarrier index.

14. The method according to any one of claims 1 to 13, wherein the first TRS burst and the second TRS burst are set as part of different non-zero power (NZP) channel state information-reference signal (CSI-RS) resource sets.

15. The method according to any one of claims 1 to 13, wherein the first TRS burst and the second TRS burst are configured as part of the same NZP CSI-RS resource set.

16. A method implemented by network nodes (16; 16a, 16b, 16c), wherein the method is Setting the wireless device (22; 22a, 22b) to perform time-domain channel property (TDCP) measurements based on a first tracking reference signal (TRS) burst and a second TRS burst (S134), The transmission of the first TRS burst and the second TRS burst (S136), wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, Receiving instructions for the TDCP measurement based on the above settings and the first TRS burst and the second TRS burst (S138) Methods that include...

17. The method according to claim 16, wherein the TDCP measurement is set for a lag of the number of slots based on the first TRS burst and the second TRS burst.

18. The method according to claim 17, wherein the number of slots is set by wireless resource control signaling.

19. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has periodicity of N*P slots and slot offset of S+L slots, The TDCP measurement is a non-periodic TDCP measurement set up with periodic Q*P for the lag of L slots based on the first TRS burst and the second TRS burst. The method according to claim 16.

20. The first TRS burst has periodicity of P slots and slot offset of S slots, The second TRS burst has a periodicity of Q*P slots and a slot offset of S+L slots, The TDCP measurement described above is set for the lags of L slots. The method according to claim 16.

21. The method according to claim 20, wherein the trigger for the non-periodic TDCP measurement is the next opportunity of the second TRS burst.

22. The first TRS burst is periodic, The second TRS burst is aperiodic, The TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. The method according to claim 16.

23. The method according to claim 22, wherein the trigger for the TDCP measurement is a TRS burst separated by L slots for any given occasion of the first TRS burst.

24. The first TRS burst and the second TRS burst are aperiodic, The TDCP measurement is a non-periodic TDCP measurement set for the lag of L slots. The method according to claim 16.

25. The method according to claim 24, wherein the trigger for aperiodic TDCP measurement is two TRS bursts separated by L slots.

26. The method according to any one of claims 16 to 25, wherein the first TRS burst and the second TRS burst are transmitted from the same antenna port.

27. The method according to any one of claims 16 to 26, wherein the resources of the first TRS burst and the resources of the second TRS burst are pseudo-collocated.

28. The method according to any one of claims 16 to 27, wherein the resource for the first TRS burst and the resource for the second TRS burst have the same time domain index and the same subcarrier index.

29. The method according to any one of claims 16 to 28, wherein the first TRS burst and the second TRS burst are set as part of different non-zero power (NZP) channel state information-reference signal (CSI-RS) resource sets.

30. The method according to any one of claims 16 to 28, wherein the first TRS burst and the second TRS burst are configured as part of the same NZP CSI-RS resource set.

31. Wireless devices (22; 22a, 22b), Receiving settings for performing time-domain channel property (TDCP) measurements based on a first tracking reference signal (TRS) burst and a second TRS burst, Receiving the first TRS burst and the second TRS burst, wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, The TDCP measurement is performed based on the above settings and the first TRS burst and the second TRS burst. A wireless device (22; 22a, 22b) configured to perform the following actions.

32. A wireless device according to claim 31, configured to carry out the method described in any one of claims 2 to 15 (22; 22a, 22b).

33. The wireless device (22; 22a, 22b) according to claim 31 or 32, comprising a processing circuit (84) and a memory (88) for storing instructions to be executed by the processing circuit (84), wherein the execution of the instructions by the processing circuit causes the wireless device (22; 22a, 22b) to perform the method according to any one of claims 1 to 15.

34. Network nodes (16; 16a, 16b, 16c), The wireless device (22; 22a, 22b) is configured to perform time-domain channel property (TDCP) measurements based on a first tracking reference signal (TRS) burst and a second TRS burst, To cause the transmission of the first TRS burst and the second TRS burst, wherein the first TRS burst is one of aperiodic and periodic, and the second TRS burst is one of aperiodic and periodic, Receiving instructions for the TDCP measurement based on the above settings and the first TRS burst and the second TRS burst. Network nodes (16; 16a, 16b, 16c) configured to perform this action.

35. A network node (16; 16a, 16b, 16c) according to claim 34, configured to carry out the method described in any one of claims 17 to 30.

36. The network node (16; 16a, 16b, 16c) according to claim 34 or 35, comprising a processing circuit (68) and a memory (72) for storing instructions to be executed by the processing circuit (68), wherein the execution of the instructions by the processing circuit (68) causes the network node (16; 16a, 16b, 16c) to perform the method according to any one of claims 16 to 30.

37. A computer program or computer program product comprising instructions to be executed by a processing circuit (84) of a wireless device (22; 22a, 22b), wherein the execution of the instructions by the processing circuit (84) causes the wireless device (22; 22a, 22b) to perform the method according to any one of claims 1 to 15.

38. A computer program or computer program product comprising instructions to be executed by a processing circuit (68) of a network node (16; 16a, 16b, 16c), wherein the execution of the instructions by the processing circuit causes the network node (16; 16a, 16b, 16c) to carry out the method according to any one of claims 16 to 30.

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