A channel state information measurement method and apparatus

Abstract

The application relates to the field of wireless communication, and provides a channel state information measurement method and device. The method comprises the following steps: determining, by a network device, a first CSI parameter set when a beam coverage area provides services, and broadcasting the first CSI parameter set to one or more terminal devices in the beam coverage area; calculating, by a terminal device, CSI difference information between the first CSI parameter set and a second CSI parameter set, and sending the CSI difference information and a measurement resource request to the network device; sending, by the network device, a measurement resource configuration to at least one selected terminal device according to the CSI difference information received from the at least one selected terminal device; and measuring, by the terminal device, a third CSI parameter set according to the resource configuration and reporting the third CSI parameter set to the network device. The application binds the channel state information with the beam coverage area, can reduce network measurement frequency, reduce reference signal time-frequency resource occupation and measurement result reporting overhead, and thus saves more time-frequency resources for data transmission.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and in particular to a method and apparatus for measuring channel state information. Background Technology

[0002] In non-terrestrial network (NTN) scenarios, satellites with orbital altitudes between 250 km and 2000 km take approximately 84 to 127 minutes to complete their Earth orbit. This means that the time a single satellite can illuminate a specific beam coverage area and provide service to terminal devices within that area is relatively short. Furthermore, according to the current standardization direction for NTN under the 3rd Generation Partnership Project (3GPP), due to the limited capabilities of satellites, the number of beams they can activate simultaneously is relatively small. Therefore, beam hopping technology is needed to enhance downlink coverage. The application of beam hopping will further shorten the service time of a satellite on a given frequency band.

[0003] According to existing measurement technology, the network side transmits corresponding reference signals on the configured time and frequency resources, and the terminal device obtains channel state information (CSI) by measuring the reference signals and reports the measurement results to the network side. Summary of the Invention

[0004] In NTN scenarios, given the short service time of a satellite covering a specific beam area, satellite communication time-domain resources are limited. Frequent measurements and result reporting would consume significant time-frequency resources. Therefore, minimizing time-frequency resource consumption within the limited service time to improve resource utilization is a crucial issue that needs to be addressed. However, existing measurement and result reporting processes consume substantial time-frequency resources, contradicting the need to reduce resource consumption in NTN scenarios. Therefore, a method is urgently needed to achieve measurement while reducing measurement overhead.

[0005] To address the aforementioned technical problems, this application provides a channel state information measurement device applied to a network device. The device includes a first processing unit configured to control the satellite network device to perform the following operations:

[0006] The first CSI parameter set is determined when the network device provides services to the beam coverage area;

[0007] Broadcast the first CSI parameter set to one or more terminal devices within the beam coverage area;

[0008] The CSI difference information is reported from the one or more terminal devices, wherein the CSI difference information is determined by the one or more terminal devices based on the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal;

[0009] Based on the CSI difference information reported from the one or more terminal devices, at least one terminal device is selected from the one or more terminal devices, and a measurement resource configuration is sent to the selected at least one terminal device according to the CSI difference information received from the selected at least one terminal device; and

[0010] Receive a third set of CSI parameters that are measured and reported by at least one selected terminal device according to the measurement resource configuration.

[0011] This application also provides a channel state information measurement device for use in a terminal device. The device includes a fourth processing unit configured to control the terminal device to perform the following operations:

[0012] Receive a first set of CSI parameters broadcast by a network device, wherein the terminal device is located within the beam coverage area provided by the network device;

[0013] Calculate the CSI difference information between the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal; and

[0014] If the CSI difference information exceeds a second preset threshold, the CSI difference information and a measurement resource request are sent to the network device.

[0015] In a further embodiment, the device further includes a fifth processing unit configured to control the terminal device to perform the following operations:

[0016] Receive measurement resource configuration sent from the network device; and

[0017] Measurements are performed according to the measurement resource configuration, and a third CSI parameter set is reported to the network device.

[0018] This application also provides a channel state information measurement method, applied to a network device, including:

[0019] The first CSI parameter set is determined when the network device provides services to the beam coverage area;

[0020] Broadcast the first CSI parameter set to one or more terminal devices within the beam coverage area;

[0021] The CSI difference information is reported from the one or more terminal devices, wherein the CSI difference information is determined by the one or more terminal devices based on the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal;

[0022] Based on the CSI difference information reported from the one or more terminal devices, at least one terminal device is selected from the one or more terminal devices, and a measurement resource configuration is sent to the selected at least one terminal device according to the CSI difference information received from the selected at least one terminal device; and

[0023] Receive a third set of CSI parameters that are measured and reported by at least one selected terminal device according to the measurement resource configuration.

[0024] This application also provides a channel state information measurement method, applied to a terminal device, including:

[0025] Receive a first set of CSI parameters broadcast by a network device, wherein the terminal device is located within the beam coverage area provided by the network device;

[0026] Calculate the CSI difference information between the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal; and

[0027] If the CSI difference information exceeds a second preset threshold, the CSI difference information and a measurement resource request are sent to the network device.

[0028] In a further embodiment, the channel state information measurement method applied to the terminal device side further includes:

[0029] Receive measurement resource configuration sent from the network device; and

[0030] Measurements are performed according to the measurement resource configuration, and a third CSI parameter set is reported to the network device.

[0031] The channel state information measurement method and apparatus provided in this application determine a first CSI parameter set (i.e., predicted CSI information) when a network device provides services to a beam coverage area; broadcast the first CSI parameter set to one or more terminal devices within the beam coverage area; the one or more terminal devices report CSI difference information (referred to as coarse CSI measurement) based on the first CSI parameter set and a second CSI parameter set obtained by measuring a specific reference signal (i.e., measured CSI information); the network device, based on the CSI difference information reported from the one or more terminal devices, selects at least one terminal device from the one or more terminal devices and sends a measurement resource configuration to the selected at least one terminal device based on the CSI difference information received from the selected at least one terminal device; the terminal device performs measurements according to the measurement resource configuration and reports a third CSI parameter set (referred to as fine CSI measurement) to the network device; the network device receives the third CSI parameter set measured and reported by the selected at least one terminal device according to the measurement resource configuration. This method can bind channel state information with the beam coverage area, reduce network measurement frequency, reduce reference signal time-frequency resource occupation and measurement result reporting overhead, thereby saving more time-frequency resources for data transmission and indirectly improving the utilization rate of NTN time-frequency resources.

[0032] To make the above and other objects, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A structural diagram of a satellite communication system according to an embodiment of this application is shown;

[0035] Figure 2 The diagram illustrates the creation, use, and update / maintenance process of CSI information at the first and second time scales according to embodiments of this application.

[0036] Figure 3 This paper illustrates a schematic diagram of satellite beam positioning within an NTN scenario according to an embodiment of this application.

[0037] Figure 4 A schematic diagram of the channel state information measurement process according to an embodiment of this application is shown;

[0038] Figure 5A flowchart of a channel state information measurement method applied to the network device side according to an embodiment of this application is shown;

[0039] Figure 6 A flowchart of a channel state information measurement method applied to a terminal device side according to an embodiment of this application is shown;

[0040] Figure 7 This invention illustrates a structural diagram of a channel state information measurement device applied to a network device side according to an embodiment of this application;

[0041] Figure 8 This invention illustrates another structural diagram of a channel state information measurement device applied to the network device side according to an embodiment of this application;

[0042] Figure 9 This invention illustrates another structural diagram of a channel state information measurement device applied to the network device side according to an embodiment of this application;

[0043] Figure 10 This invention illustrates a structural diagram of a channel state information measurement device applied to a terminal device side according to an embodiment of this application;

[0044] Figure 11 This paper shows another structural diagram of a channel state information measurement device applied to the terminal device side according to an embodiment of this application;

[0045] Figure 12 A schematic diagram of a terminal device according to an embodiment of this application is shown;

[0046] Figure 13 A schematic diagram of the network device configuration according to an embodiment of this application is shown.

[0047] Explanation of symbols in the attached drawings:

[0048] 101. Terminal equipment;

[0049] 102. Network equipment;

[0050] 701, First Processing Unit;

[0051] 702, Second Processing Unit;

[0052] 703, Third Processing Unit;

[0053] 1001, Fourth Processing Unit;

[0054] 1002, Fifth Processing Unit;

[0055] 1200. Terminal equipment;

[0056] 1210. Processor;

[0057] 1220. Memory;

[0058] 1230. Communication module;

[0059] 1240. Input Unit;

[0060] 1250. Monitor;

[0061] 1260. Power supply;

[0062] 1300. Network equipment;

[0063] 1310. Processor;

[0064] 1320. Memory;

[0065] 1330. Program;

[0066] 1340. Transceiver;

[0067] 1350, Antenna. Detailed Implementation

[0068] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0069] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, apparatus, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0070] In this specification, unless otherwise stated, "and / or" describes an association between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. Furthermore, in this disclosure, unless otherwise stated, "multiple" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0071] In this specification, the expressions "greater than" or "less than" may be used to determine whether a specific condition is met. However, this is only for illustrative purposes and is not intended to exclude statements of "above" or "below". A condition described as "above" may be replaced by "greater than", a condition described as "below" may be replaced by "less than", and a condition described as "above and less than" may be replaced by "greater than and below". Furthermore, hereinafter, "A" to "B" represent at least one of the elements from A (inclusive) to B (inclusive).

[0072] In the embodiments of this application, the singular forms "a," "the," etc., including the plural forms, should be broadly understood as "a kind" or "a class" rather than limited to the meaning of "an." Furthermore, the term "the" should be understood to include both the singular and plural forms, unless the context explicitly indicates otherwise. Additionally, the term "according to" should be understood as "at least partially based on…," and the term "based on" should be understood as "at least partially based on…," unless the context explicitly indicates otherwise.

[0073] This specification provides the operational steps of the methods described in the embodiments or flowcharts, but based on conventional or non-inventive labor, more or fewer operational steps may be included. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only possible execution order. In actual system or device products, the methods shown in the embodiments or drawings can be executed sequentially or in parallel.

[0074] It should be noted that in the embodiments of this application, certain software, components, models and other existing solutions in the industry may be mentioned. These should be regarded as exemplary and are only intended to illustrate the feasibility of implementing the technical solution of this application. However, it does not mean that the applicant has used or necessarily used the solution.

[0075] This application uses terminology used in some communication specifications (e.g., the 3rd Generation Partnership Project, the European Telecommunications Standards Institute, ETSI, Extensible Radio Access Network, ERAN, and Open-Radio Access Network, O-RAN) to describe various embodiments, but this is merely illustrative. The various embodiments of this application can also be readily modified and applied in other communication systems.

[0076] In the embodiments of this application, communication between devices in the communication system can be carried out according to communication protocols at any stage, such as including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR) and / or other currently known or future communication protocols.

[0077] For ease of understanding, the technical terms involved in the embodiments of this application will be explained below.

[0078] (1) Terminal Device: refers to a device with wireless transceiver capabilities that can work with network equipment to provide communication services to users. Terminal devices can also be called terminals, user equipment (UE), user terminals, mobile terminals (MT), or user agents, etc. For example, terminal devices can be mobile phones, tablets, laptops, wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless communication devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, Internet of Things (IoT) devices, narrowband Internet of Things (NB-IoT) devices, vehicle-to-everything (V2X) devices, devices in device-to-device communication (D2D), enhanced machine-type communication (eMTC) devices, and reduced-capacity devices. Capability (RedCap), cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), clients, handheld devices with wireless communication capabilities, vehicle-mounted devices, or shipboard devices, etc.

[0079] In scenarios such as the Internet of Things (IoT), terminal devices can also be machines or devices used for monitoring or measurement, including but not limited to: machine-type communication (MTC) terminals, vehicle-mounted communication terminals, device-to-device terminals, machine-to-machine (M2M) terminals, and so on.

[0080] (2) Network equipment: refers to network-side equipment capable of communicating with terminal equipment. Network equipment can be located on satellites or the ground. Network equipment can also be called space base stations, satellite-borne base stations, satellites, satellite communication nodes, satellite network terminal equipment, satellite communication modules, or base stations, etc. This network-side equipment can also be called access network equipment or wireless access network equipment. Network-side equipment can be a base station (BTS) in a satellite-borne Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA) communication system, a base station (NodeB, NB) in a satellite-borne Wideband Code Division Multiple Access (WCDMA) system, an evolved base station (eNB or eNodeB) in a satellite-borne LTE system, a base station in a terrestrial network or non-terrestrial network (NTN), such as a base station (gNB) in a satellite-borne 5G network, a base station in a future network after 5G (e.g., 6G network), a base station in a future evolved Public Land Mobile Network (PLMN) network, a Transmission Reception Point (TRP) in a satellite, or a Cloud Radio Access Network in a satellite. In the context of Networks (CRAN), wireless controllers can also be satellite-borne city base stations, micro base stations, pico base stations, or femtobase stations. Base stations can also be ground-based base stations capable of satellite communication, and can be referred to as Access Points (APs), 5G nodes, wireless points, or Transmission / Reception Points (TRPs), the latter being other terms with equivalent technical meanings. Network equipment can also refer to base station equipment carried by High Altitude Platform Stations (HAPS) with loiter capabilities, such as large balloons or airships, base station equipment in Roadside Units (RSUs), or base station equipment in vehicle-to-everything (V2X) networks.

[0081] Both terminal devices and base station devices can perform beamforming, but the embodiments of this application are not limited to this. In some embodiments, the terminal may or may not perform beamforming. Furthermore, the base station may or may not perform beamforming. That is, only one of the terminal and the base station can perform beamforming, or neither the terminal nor the base station may perform beamforming. In this application, a beam refers to the spatial flow of signals in a wireless channel, formed by one or more antennas or antenna elements; such a formation process can be called beamforming.

[0082] Furthermore, the term "network side" or "network equipment side" refers to one side of the network, which can be a base station or include one or more network devices as described above. The term "terminal side" or "terminal equipment side" refers to the side of the user or terminal, which can be a UE or include one or more terminal devices as described above.

[0083] According to 3GPP TS38.215 and TS38.331 protocols, the existing measurement mechanism is as follows: The network side configures measurement resources and sends reference signals according to the configuration. These reference signals include, for example, a Synchronization Signal Block (SSB) and a Channel State Information Reference Signal (CSI-RS). The terminal device receives the reference signals according to the configuration and obtains the CSI by measuring them. The terminal device then reports the measurement results (including the CSI) to the network side via Uplink Control Information (UCI). The network side instructs subsequent operations based on the measurement results.

[0084] In NTN scenarios, given the short service time of a satellite covering a specific beam area, satellite communication time-domain resources are limited. Frequent measurements and result reporting would consume significant time-frequency resources. Therefore, minimizing time-frequency resource consumption within the limited service time to improve resource utilization is a crucial issue that needs to be addressed. However, current measurement technologies involve the network transmitting reference signals on allocated time-frequency resources, and terminal devices measuring these signals to obtain CSI and reporting the results to the network. This measurement and reporting process consumes substantial time-frequency resources, contradicting the requirements of the NTN scenario. Therefore, to reduce measurement overhead, the measurement mechanism in NTN scenarios needs to be adjusted based on the characteristics of the NTN channel.

[0085] First aspect of the embodiments

[0086] The first aspect of this application provides a satellite communication system, such as... Figure 1As shown, the satellite communication system includes: terminal equipment 101 and network equipment 102.

[0087] When providing services for a certain beam coverage area, network device 102 performs the following operations: predicts a first CSI parameter set; broadcasts the first CSI parameter set to one or more terminal devices within the beam coverage area; receives CSI difference information reports from one or more terminal devices; selects at least one terminal device from the one or more terminal devices based on the CSI difference information reports received from the one or more terminal devices, and sends a measurement resource configuration to the selected at least one terminal device according to the CSI difference information received from the selected at least one terminal device; and receives a third CSI parameter set measured and reported by the selected at least one terminal device according to the measurement resource configuration.

[0088] In specific implementation, network device 102 selects at least one or more terminal devices from the terminal devices that report CSI difference information, configures measurement resources for the selected one or more terminal devices according to the CSI difference information of the selected one or more terminal devices, and sends reference signals according to the configuration; and receives a third CSI parameter set measured and reported by the selected one or more terminal devices according to the reference signals.

[0089] Terminal device 101 is configured to receive a first CSI parameter set broadcast by network device 102, wherein terminal device 101 is located in the beam coverage area provided by network device 102; calculate CSI difference information between the first CSI parameter set and a second CSI parameter set obtained by measuring a specific reference signal; if the CSI difference information exceeds a second preset threshold, send the CSI difference information and a measurement resource request to network device 102; receive a measurement resource configuration sent from network device 102; perform measurements according to the measurement resource configuration and report a third CSI parameter set to network device 102.

[0090] This embodiment determines a first CSI parameter set (i.e., predicted CSI information) when a network device provides services to a beam coverage area; broadcasts the first CSI parameter set to one or more terminal devices within the beam coverage area; one or more terminal devices report CSI difference information (referred to as coarse CSI measurement) based on the first CSI parameter set and a second CSI parameter set obtained by measuring a specific reference signal (i.e., measured CSI information); based on the CSI difference information reported from one or more terminal devices, selects at least one terminal device from the one or more terminal devices, and sends a configuration measurement resource to the selected at least one terminal device according to the CSI difference information received from the selected at least one terminal device; the terminal device performs measurements according to the configuration of the measurement resource and reports a third CSI parameter set (referred to as fine CSI measurement) to the network device; the network device receives the third CSI parameter set measured and reported by the selected at least one terminal device according to the configuration of the measurement resource. This enables the binding of channel state information with the beam coverage area, reduces the network measurement frequency, reduces the time-frequency resource occupation of reference signals and the overhead of measurement result reporting, thereby saving more time-frequency resources for data transmission and indirectly improving the utilization rate of NTN time-frequency resources.

[0091] Specific reference signals include, for example, SSB and CSI-RS. CSI difference information is obtained by calculating the difference between the first CSI parameter set and the second CSI parameter set.

[0092] The second preset threshold can be determined based on the maximum CSI difference that satisfies the physical channel link margin and data communication quality requirements. The second preset threshold may also have other performance types and values.

[0093] A beam refers to an electromagnetic beam that transmits or receives signals in a spatially directional manner through an antenna array, and is usually associated with one or more reference signals. The coverage area of ​​a particular beam is called a beam position, which refers to a geographical area covered by a single beam, pre-defined according to the satellite beam size. In subsequent embodiments, unless otherwise specified, a beam position refers to the beam coverage area.

[0094] The following specific embodiment illustrates the process of determining the first CSI parameter set:

[0095] As described in 3GPP TR38.811, the NTN channel is highly correlated with large-scale fading. Relatively accurate NTN channel information can be directly calculated based on the satellite illumination angle and large-scale fading information. Specifically, the satellite illumination angle for a given wavelength is calculated based on the satellite's current ephemeris information.

[0096] Furthermore, as described in 3GPP TR38.811NTN, many parameters related to large-scale fading in the channel are related to geographical factors such as ground obstacle type, obstacle density, altitude, and latitude. By conducting actual measurements of geographical factors at different locations, a channel fading probability distribution model corresponding to different geographical factors is determined. Based on the geographical factors and the corresponding channel fading probability distribution model for each wave position, the prior CSI fading parameters for that wave position are calculated and stored, forming the first time-scale CSI information. The first time-scale CSI information changes slowly or even remains constant over time.

[0097] Specifically, the first time-scale CSI information includes at least: the prior CSI fading parameters or the levels of prior CSI fading parameters for each spectral position, each operating frequency band, and the satellite illumination angle; and / or the channel fading probability distribution model for each spectral position.

[0098] The prior CSI fading parameters for each wavelength position, each operating frequency band, and the satellite illumination angle are calculated based on the geographical factors and the LoS (Line of Sight) probability of each wavelength position, and / or calculated based on the channel fading probability distribution model of each wavelength position.

[0099] Among them, the channel fading probability distribution model for each wavelength position is derived from the channel fading parameters and Loss probability inference of each working frequency band and satellite illumination angle measured under the geographical location information of each wavelength position.

[0100] In addition, as described in 3GPP TR38.811, some parameters related to large-scale fading in the NTN channel are also affected by meteorological factors. By recording the difference between the historical channel fading measurement value at the same location and the CSI parameter at that location in the first time-scale CSI information, a second time-scale CSI information is formed. The second time-scale CSI information reflects the influence of meteorological factors on the CSI fading parameters.

[0101] Specifically, the second timescale CSI information includes at least the differences or difference levels between the historical measured CSI fading parameters for each wavelength, each operating frequency band, and each satellite illumination angle and the prior CSI fading parameters for each wavelength, each operating frequency band, and each satellite illumination angle.

[0102] Specifically, the first CSI parameter set can be determined in the following way:

[0103] Method 1: CSI is influenced by geographical and meteorological factors. The first CSI parameter set is determined based on the impact of these factors on channel fading. Specifically, geographical factors include, but are not limited to, ground obstacle types, obstacle density, altitude, and latitude. Meteorological factors include, but are not limited to, atmospheric absorptivity, cloud and rain fading, ionospheric scintillation, and tropospheric scintillation.

[0104] Method 2: Calculate the first CSI parameter set based on the first timescale CSI information, the second timescale CSI information, the satellite ephemeris information of the network equipment, and the operating frequency band.

[0105] The first time-scale CSI information is determined based on the constant influence of geographical factors on channel fading. The second time-scale CSI information is determined based on the drastic influence of meteorological factors on channel fading. For details regarding the specific information included in the first and second time-scale CSI information, please refer to the preceding paragraphs.

[0106] In some implementations, based on first-timescale CSI information, second-timescale CSI information, satellite ephemeris information of the network device, and its operating frequency band, a first CSI parameter set is calculated for the network device to provide services for a spectral frequency, including:

[0107] Based on the satellite ephemeris information of the network equipment, the satellite illumination angle is calculated; based on the wavefront, operating frequency band, and satellite illumination angle, the target prior CSI fading parameters are obtained from the first time-scale CSI information; based on the wavefront, operating frequency band, and satellite illumination angle, the target difference is obtained from the second time-scale CSI information; based on the target prior CSI fading parameters and target difference, large-scale fading information is predicted; based on the predicted large-scale fading information and the NTN channel model, the first CSI parameter set is calculated. The NTN channel model can be found in 3GPP TR38.811.

[0108] The process of predicting large-scale fading information based on the target's prior CSI fading parameters and the target's differences includes: at least performing a weighted summation on the target's prior CSI fading parameters and the target's differences to obtain the large-scale fading information. In practice, the weights for the weighted summation can be determined based on the actual service quality during historical service processes.

[0109] In some embodiments of this application, network device 102 also performs the following operations:

[0110] (1) Update the second timescale CSI information based on the wave position, the operating frequency band of the selected at least one terminal device, and the third CSI parameter set reported by the selected at least one terminal device.

[0111] In some implementations, this step includes: performing smoothing filtering on the third CSI parameter set reported by at least one selected terminal device; performing weighted averaging on the smoothed CSI parameter set; determining the item to be updated based on the wave position, the operating frequency band of the at least one selected terminal device, and the satellite illumination angle; and recalculating the difference value of the item to be updated using the CSI parameters obtained from the weighted averaging as the historical measured CSI fading parameters of the item to be updated, and updating the item to be updated in the second time-scale CSI information using the difference value of the item to be updated.

[0112] In some implementations, step (1) further includes: triggering timing when the difference or difference level in the second timescale CSI information exceeds a first preset threshold; resetting timing when the difference or difference level in the second timescale CSI information is within the first preset threshold; and triggering the update of the first timescale CSI information if the timing exceeds a preset duration.

[0113] The first preset threshold and the preset duration are determined based on the meteorological prior information of the wave position.

[0114] Updating the first time-scale CSI information includes: performing weighted summation on the data of relevant items in the first time-scale CSI information and the second time-scale CSI information; and updating the data of relevant items in the first time-scale CSI information using the data obtained from the relevant item processing.

[0115] (2) Determine the fourth CSI parameter set based on the updated second timescale CSI information, the first timescale CSI information, the satellite ephemeris information and operating frequency band of the bearer network equipment; or determine the fourth CSI parameter set based on the third CSI parameter set reported by at least one selected terminal device.

[0116] The process of determining the fourth CSI parameter set based on the updated second timescale CSI information, the first timescale CSI information, the satellite ephemeris information and operating frequency band of the bearer network equipment can be referenced from the process of determining the third CSI parameter set based on the second timescale CSI information, the first timescale CSI information, the satellite ephemeris information and operating frequency band of the bearer network equipment.

[0117] The fourth CSI parameter set can be obtained by averaging the third CSI parameter set reported by at least one selected terminal device.

[0118] (3) Determine the signal transmission configuration information based on the fourth CSI parameter set.

[0119] The signal transmission configuration information includes at least the following: Modulation and Coding Scheme (MCS), coding rate, time and frequency resources, number of transmission layers, Precoding Matrix Indicator (PMI), transmission mode, Bandwidth Part (BWP) configuration, reference signal configuration, and power control parameters.

[0120] (4) The signal transmission configuration information is reused for terminal equipment in the same frequency band within the wavelet.

[0121] The first timescale CSI information can be represented by a large timescale table, and the second timescale CSI information can be represented by a small timescale table. The following is a specific example illustrating the creation, use, and updating / maintenance process of the large timescale CSI table and the small timescale CSI table.

[0122] The process of creating, using, updating, and maintaining large-scale and small-scale CSI tables is as follows: Figure 2 As shown, Figure 2 Steps 201 and 202 are the procedures required before the network device begins service. The remaining steps represent the CSI measurement-related procedures required during the actual service process of the network device, specifically including:

[0123] 201. Create large-scale CSI tables:

[0124] Large-scale fading is primarily influenced by factors such as free-space path loss, shadow fading, clutter loss, atmospheric absorptivity, cloud and rain fading, ionospheric scintillation, and tropospheric scintillation. Among these factors, shadow fading, clutter loss, atmospheric absorptivity, and ionospheric scintillation are closely related to geographical factors such as topographic features, types and density of ground obstacles, altitude, and latitude. The geographically relevant LosS probabilities and large-scale fading parameters for each wavelength covered by network equipment are stored in a large-timescale CSI table.

[0125] Furthermore, based on the channel fading probability distribution model corresponding to different geographical factors, and combined with the actual geographical information of each wavelength position, a large-scale CSI table can be established for each wavelength position, indicating the basic large-scale fading parameters related to geographical factors for each wavelength position.

[0126] Furthermore, based on the actual service quality requirements of different wavelengths, the stored parameters can be quantified into fading levels of different granularities, with each fading level corresponding to a specific range of fading parameters.

[0127] 202. Create a small-scale CSI table:

[0128] As described in 3GPP TR38.811, in addition to geographically related factors, large-scale fading in NTN channels is also closely related to meteorological factors, and the degree of change of meteorological conditions over time is more drastic than that of geographically related factors. A small-timescale CSI table is established and maintained, and the content stored in the small-timescale CSI table is defined as the difference between the actual CSI and the corresponding large-scale fading parameters in the large-timescale CSI table.

[0129] Prior information related to meteorological factors mainly includes: atmospheric absorptivity, cloud and rain fading, ionospheric scintillation, and tropospheric scintillation. Based on the probability distribution of meteorological parameters and historical channel fading measurements, the difference between the actual channel fading and the parameters in the stored large-scale CSI table is calculated, and a small-scale CSI table is generated accordingly.

[0130] Furthermore, different difference ranges can be quantified into different difference levels, and the granularity can be set at least according to the actual service requirements of the wave position.

[0131] 203. Channel Prediction:

[0132] Based on the satellite ephemeris and coverage wavelength information of the network equipment, calculate the satellite illumination angle of the network equipment for the wavelength to which it will provide services;

[0133] Based on the operating frequency and the calculated satellite illumination angle, consult the large-scale CSI table for the corresponding wavelength position to obtain the large-scale fading parameters of the channel for the wavelength position that will be provided with services.

[0134] Consult the small-scale CSI table for the corresponding wave position to obtain the difference information between the measured parameters of its historical channel large-scale attenuation and the parameters recorded in the corresponding large-scale CSI table;

[0135] Based on the difference information and channel large-scale fading related parameters obtained above, the CSI of the service frequency band to be provided is comprehensively predicted. This comprehensive prediction process can be carried out at least by weighted summation, and the weights can be determined at least based on the actual service quality in the historical service process.

[0136] After obtaining the predicted large-scale fading information, the predicted CSI, i.e. the first CSI parameter set, is calculated according to the NTN channel model.

[0137] 204. Small timescale CSI table update and maintenance:

[0138] Update Triggering: After the network device broadcasts the predicted CSI, the terminal device receives and demodulates the corresponding CSI information. Subsequently, the terminal device compares the broadcast CSI information with the CSI measurement results obtained through SSB measurement to determine the CSI difference level. If the difference level exceeds a second preset threshold, the terminal device reports the difference level to the network device and requests relevant measurement resources for precise CSI measurement. This second preset threshold should be determined based on at least the physical channel link margin and data communication quality requirements. For example, the maximum CSI difference that satisfies the physical channel link margin and data communication quality requirements can be set as the second preset threshold. If the CSI difference level exceeds this maximum CSI difference, the actual communication requirements cannot be met, triggering precise CSI measurement.

[0139] Update method: After at least one selected terminal device for CSI precision measurement reports the measured CSI information, the network device smooths and filters the reported results from the selected terminal device to remove noise. Subsequently, the network device can update the corresponding information in the small time-scale CSI table at least by weighted summation. The weights can be set according to the selection method of the precision measurement terminal device. For example, if the precision measurement terminal device is randomly selected, the CSI weights reported by different terminal devices are set to be equal.

[0140] 205. Large-scale CSI table update and maintenance:

[0141] Update trigger: When the difference level in the small-scale CSI table exceeds a first preset threshold, the large-scale CSI table update timer is activated. If, in the next measurement, the difference level in the small-scale CSI table falls back to within the allowable range of the first preset threshold, the timer is reset; if, in the next measurement, the difference level in the small-scale CSI table still exceeds the first preset threshold, the timer is not reset. When the timer expires, it indicates that an irreparable CSI change has occurred for the corresponding wave position, triggering a large-scale CSI table update. The first preset threshold and the timer's upper limit are determined based on at least the meteorological prior information for the corresponding wave position.

[0142] Update method: The large-scale CSI table can be updated at least by weighted summing of the original CSI parameters in the large-scale CSI table and the corresponding parameters in the updated small-scale CSI table. The weights can be determined at least based on prior information about the proportion of the influence of meteorological and geographical factors on the NTN channel.

[0143] One specific embodiment of this application, such as Figure 3 As shown, Figure 3 This diagram illustrates a satellite beam configuration within an NTN scene, where... Figure 3The two terminal devices 101 are different terminal devices operating in the same frequency band within the same wavelet. Based on the first time-scale CSI information, the second time-scale CSI information, and... Figure 3 The channel state information measurement process for the NTN scenario shown is as follows: Figure 4 As shown, it specifically includes:

[0144] 401. CSI Prediction:

[0145] Based on the first timescale CSI information, the second timescale CSI information, the satellite ephemeris information of the network equipment, and the operating frequency band, calculate the first CSI parameter set when the satellite provides services for a certain spectral position.

[0146] In this application, a specific wavelength position refers to the current wavelength position of the satellite. The specific process for determining the first CSI parameter set can be found in the foregoing embodiments, and will not be detailed here.

[0147] 402. CSI coarse measurement:

[0148] 4021. The network device transmits the predicted first CSI parameter set to the terminal devices residing within that frequency range via broadcast, such as... Figure 3 Terminal device 101. The first CSI parameter set can be at least one or more of the forms such as CQI, RSRP, RSRQ, SINR and codebook, and the signaling carrying broadcast CSI information (first CSI parameter set) can be at least one or more of SIB1, SIB19 and other system information (OSI).

[0149] 4022. The terminal equipment residing within this waveband receives and demodulates the broadcast CSI information, compares and judges the broadcast CSI information with the CSI information obtained by measuring the SSB (i.e., the second CSI parameter set), and obtains a rough CSI difference level.

[0150] At least one approach is to subtract the broadcast CSI information from the CSI information obtained by measuring the SSB, compare the calculated result with the decision threshold, and classify it into the corresponding difference level based on the comparison result.

[0151] 4023. If the CSI difference level exceeds the second preset threshold, the terminal device reports the CSI difference level to the network device and requests the relevant measurement resources for accurate CSI measurement.

[0152] The second preset threshold can be set with multiple difference level judgment thresholds according to the accuracy requirements, and the difference between two difference level judgment thresholds can be quantified into a difference level.

[0153] 403, CSI Precision Measurement

[0154] 4031. After receiving measurement resource requests from different terminal devices within a given frequency band, the network device selects at least one terminal device (UE) from among the terminal devices that initiated the measurement resource requests for a specific operating frequency band to perform CSI measurements. For the selected terminal device performing CSI fine measurement, the network device selects a suitable configuration from the existing protocol-supported or newly designed measurement resource configuration set based on the reported difference level.

[0155] 4032. The network device transmits the selection results of the precision measurement terminal device and the measurement resource configuration to the corresponding terminal device.

[0156] The information transmitted by the network device can be carried by at least one or more of downlink control information (DCI), RRC signaling, and other possible forms.

[0157] 4033. The network device sends a reference signal to the corresponding terminal device on the corresponding time and frequency resources according to the measurement resource configuration.

[0158] 4034. At least one terminal device selected for CSI precision measurement receives and measures the corresponding reference signal at the corresponding time-frequency resource location according to the received configuration information, and obtains the precisely measured CSI information, namely the third CSI parameter set.

[0159] 4035. At least one terminal device selected for CSI precision measurement shall report the measurement results obtained from the precision CSI measurement to the network device in accordance with the CSI reporting rules.

[0160] 404. Update CSI information for the second time scale.

[0161] 4041. The network device updates the second time-scale CSI information based on the CSI information reported by at least one terminal device selected for CSI fine measurement.

[0162] 4042. The network device updates the CSI information based on the updated second timescale CSI information and the original first timescale CSI information, and configures the signal transmission accordingly. The network device reuses this configuration for all terminal devices operating in the same frequency band within this wavelet, providing them with services.

[0163] 405. Update CSI information at the first time scale.

[0164] When the CSI difference level indicated by the first timescale CSI information exceeds a first preset threshold, and the duration of exceeding the threshold exceeds the time limit, the second timescale CSI information is updated based on the first timescale CSI information.

[0165] In some embodiments of this application, in order to further reduce the overall occupation of measurement reference signal resources and measurement reporting overhead, for a certain operating frequency band, the satellite network device selects at least one terminal device from one or more terminal devices that report measurement resource requests in at least one of the following ways:

[0166] (1) Random selection: Randomly select at least one terminal device from the first target terminal devices in each working frequency band, wherein the first target terminal device is the terminal device that reports the measurement resource request.

[0167] For example, if the reported difference levels between different terminal devices are significantly different, then more terminal devices should be selected for measurement.

[0168] (2) Selection based on historical data: Randomly select at least one terminal device from the second target terminal devices in each working frequency. The second target terminal device is a terminal device that has reported measurement resource requests and has generated service exchanges at the waveform position.

[0169] (3) Selection based on business needs: Select at least one terminal device from the first target terminal devices in each working frequency according to the data volume required by the terminal device business needs.

[0170] Specifically, for each operating frequency band, the selection can be based at least on the amount of data required by the terminal device's business needs. For example, terminal devices with higher business needs can be selected for accurate CSI measurement to improve the service quality for the selected terminal devices.

[0171] (4) Selection based on prior information of difference level probability distribution: Select at least one terminal device from the first target terminal devices in each working frequency band based on prior information of difference level probability distribution.

[0172] For example, if the probability distribution of the difference levels is uniform, then for each operating frequency band, precision measurement terminal equipment is selected uniformly within each difference level range. If the probability distribution of the difference levels is Gaussian, then for each operating frequency band, a small number of precision measurement terminal equipment are selected within the high and low difference level ranges, and a larger number of precision measurement terminal equipment are selected within the medium difference level range.

[0173] Second aspect of the embodiments

[0174] In some embodiments, a method for measuring channel state information applied to the network device side is also provided, such as... Figure 5 As shown, it includes:

[0175] 501, Determines the first set of CSI parameters when the network device provides services to the spectral position.

[0176] 502, broadcasts the first CSI parameter set to one or more terminal devices within the beam coverage area.

[0177] 503, Receive CSI difference information reports from one or more terminal devices.

[0178] The CSI difference information reporting is determined by the one or more terminal devices based on the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal.

[0179] 504. Based on the CSI difference information reported from one or more terminal devices, select at least one terminal device from the one or more terminal devices, and send measurement resource configuration to the at least one selected terminal device according to the CSI difference information received from the at least one selected terminal device.

[0180] 505, Receive a third set of CSI parameters measured and reported by at least one selected terminal device according to the measurement resource configuration.

[0181] In some implementations, step 501 determines a first set of CSI parameters when the network device provides services for a spectral position, including:

[0182] Based on the first timescale CSI information, the second timescale CSI information, the satellite ephemeris information and operating frequency band of the network equipment, calculate the first CSI parameter set when the network equipment provides services for the spectral position;

[0183] Among them, the first time-scale CSI information is determined based on the invariant effect of geographical factors on channel fading;

[0184] The second timescale CSI information is determined based on the severe impact of meteorological factors on channel fading.

[0185] In some implementations, the first time-scale CSI information includes at least: prior CSI fading parameters or the levels of prior CSI fading parameters for each spectral position, each operating frequency band, and satellite illumination angle; and / or a channel fading probability distribution model for each spectral position.

[0186] Among them, the prior CSI fading parameters for each wave position, each operating frequency band, and satellite illumination angle are calculated based on the geographical factors and LosS probability of each wave position, and / or calculated based on the channel fading probability distribution model of each wave position.

[0187] Among them, the channel fading probability distribution model for each wavelength position is derived from the channel fading parameters and Loss probability inference of each working frequency band and satellite illumination angle measured under the geographical location information of each wavelength position.

[0188] In some implementations, the second timescale CSI information includes at least the difference or difference level between the historical measured CSI fading parameters for each wavelength, each operating frequency band, and the satellite illumination angle and the prior CSI fading parameters for each wavelength, each operating frequency band, and the satellite illumination angle.

[0189] In some implementations, based on first-timescale CSI information, second-timescale CSI information, satellite ephemeris information of the network device, and its operating frequency band, a first CSI parameter set is calculated for the network device to provide services for a spectral frequency, including:

[0190] Calculate the satellite illumination angle based on the satellite ephemeris information of the network equipment;

[0191] Based on the wave position, operating frequency band, and satellite illumination angle, the target's prior CSI fading parameters are obtained from the CSI information at the first time scale.

[0192] Based on wave position, operating frequency band, and satellite illumination angle, target differences are obtained from CSI information at the second time scale;

[0193] Based on the target's prior CSI fading parameters and the target's differences, predict large-scale fading information;

[0194] Based on the predicted large-scale fading information and the NTN channel model, the first CSI parameter set is calculated.

[0195] In some implementations, large-scale fading information is predicted based on the target's prior CSI fading parameters and target differences, including:

[0196] At least the prior CSI fading parameters of the target and the target difference are weighted and summed to obtain large-scale fading information.

[0197] In some embodiments of this application, the channel state information measurement method applied to the network device side further includes:

[0198] The second timescale CSI information is updated based on the wave position, the operating frequency band of at least one selected terminal device, and the third CSI parameter set reported by at least one selected terminal device.

[0199] The fourth CSI parameter set is determined based on the updated second timescale CSI information, the first timescale CSI information, the satellite ephemeris information and operating frequency band of the bearer network equipment; or the fourth CSI parameter set is determined based on the third CSI parameter set reported by at least one selected terminal device.

[0200] Based on the fourth CSI parameter set, determine the signal transmission configuration information;

[0201] The signal transmission configuration information is reused for terminal devices in the same frequency band within the same wavelength range.

[0202] Specifically, the second timescale CSI information is updated based on the wave position, the operating frequency band of at least one selected terminal device, and the third CSI parameter set reported by at least one selected terminal device, including:

[0203] Smoothing filtering is applied to the third CSI parameter set reported by at least one selected terminal device;

[0204] At least a weighted average should be performed on the CSI parameter set after smoothing filtering;

[0205] The items to be updated are determined based on the wave position, the operating frequency band of at least one selected terminal device, and the satellite illumination angle; and

[0206] The CSI parameters obtained by weighted averaging are used as the historical measured CSI fading parameters of the items to be updated. The difference values ​​of the items to be updated are recalculated, and the difference values ​​of the items to be updated are used to update the items to be updated in the CSI information of the second time scale.

[0207] In some embodiments of this application, the channel state information measurement method applied to the network device side further includes:

[0208] Timing is triggered when the difference or difference level in the CSI information at the second time scale exceeds the first preset threshold.

[0209] If the difference or difference level in the CSI information at the second time scale is within the first preset threshold, the timing is reset.

[0210] If the timeout exceeds the preset duration, the first timescale CSI information will be updated.

[0211] This includes updating the first timescale CSI information, including:

[0212] At least the data of relevant items in the first time scale CSI information and the second time scale CSI information should be weighted and summed.

[0213] The data obtained from the correlation processing are used to update the data of the correlation items in the first time scale CSI information.

[0214] In some embodiments of this application, selecting at least one terminal device from one or more terminal devices that report measurement resource requests includes at least one of the following methods:

[0215] At least one terminal device is randomly selected from the first target terminal devices in each working frequency band. The first target terminal device is the terminal device that reports the measurement resource request.

[0216] At least one terminal device is randomly selected from the second target terminal devices in each working frequency. The second target terminal device is a terminal device that has reported measurement resource requests and has generated service exchanges at the waveform position.

[0217] Based on the data volume required by the terminal device's business, at least one terminal device is selected from the first target terminal devices in each working frequency.

[0218] Based on the prior information of the probability distribution of the difference level, at least one terminal device is selected from the first target terminal devices in each working frequency band.

[0219] Third aspect of the embodiments

[0220] In some embodiments, a method for measuring channel state information applied to the terminal device side is also provided, such as... Figure 6 As shown, it includes:

[0221] 601, Receive the first CSI parameter set broadcast by the network device, wherein the terminal device is located in the beam coverage area provided by the network device.

[0222] 602, Calculate the CSI difference information between the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal.

[0223] 603. If the CSI difference information exceeds the second preset threshold, send the CSI difference information and measurement resource request to the network device.

[0224] Conversely, if the CSI difference information does not exceed the second preset threshold, there is no need to send CSI difference information and measurement resource requests to the network device.

[0225] The second preset threshold is determined based on the maximum CSI difference that satisfies the physical channel link margin and data communication quality requirements.

[0226] Furthermore, channel state information measurement methods applied to the terminal device side also include:

[0227] Receive measurement resource configuration sent from the network device; and

[0228] Measurements are performed according to the measurement resource configuration, and a third CSI parameter set is reported to the network device.

[0229] Fourth aspect of the embodiment

[0230] In some embodiments, a channel state information measurement device applied to the network device side is also provided, such as... Figure 7As shown, the channel state information measurement device applied to the network device side includes a first processing unit 701, which is configured to control the network device to perform the following operations:

[0231] Determine the first set of CSI parameters when the network device provides services for the waveform;

[0232] Broadcast the first CSI parameter set to one or more terminal devices within the beam coverage area;

[0233] CSI difference information is reported from one or more terminal devices, wherein the CSI difference information is determined by one or more terminal devices based on a first CSI parameter set and a second CSI parameter set obtained by measuring a specific reference signal;

[0234] Based on CSI discrepancy information reported from one or more terminal devices, at least one terminal device is selected from the one or more terminal devices, and measurement resource configuration is sent to the selected at least one terminal device according to the CSI discrepancy information received from the selected at least one terminal device; and

[0235] Receive a third set of CSI parameters measured and reported by at least one selected terminal device according to the measurement resource configuration.

[0236] In some implementations, the first processing unit 701 determines a first CSI parameter set when the network device provides services for a spectral position, including:

[0237] Based on the first timescale CSI information, the second timescale CSI information, the satellite ephemeris information and operating frequency band of the network equipment, calculate the first CSI parameter set when the network equipment provides services for the spectral position;

[0238] Among them, the first time-scale CSI information is determined based on the invariant effect of geographical factors on channel fading;

[0239] The second timescale CSI information is determined based on the severe impact of meteorological factors on channel fading.

[0240] In some implementations, the first time-scale CSI information includes at least: prior CSI fading parameters or the levels of prior CSI fading parameters for each spectral position, each operating frequency band, and satellite illumination angle; and / or a channel fading probability distribution model for each spectral position.

[0241] Among them, the prior CSI fading parameters for each wave position, each operating frequency band, and satellite illumination angle are calculated based on the geographical factors and LosS probability of each wave position, and / or calculated based on the channel fading probability distribution model of each wave position.

[0242] Among them, the channel fading probability distribution model for each wavelength position is derived from the channel fading parameters and Loss probability inference of each working frequency band and satellite illumination angle measured under the geographical location information of each wavelength position.

[0243] In some implementations, the second timescale CSI information includes at least the difference or difference level between the historical measured CSI fading parameters for each wavelength, each operating frequency band, and the satellite illumination angle and the prior CSI fading parameters for each wavelength, each operating frequency band, and the satellite illumination angle.

[0244] In some implementations, the first processing unit 701 calculates a first CSI parameter set for when the network device provides services for a spectral frequency based on first timescale CSI information, second timescale CSI information, satellite ephemeris information of the network device, and its operating frequency band, including:

[0245] Calculate the satellite illumination angle based on the satellite ephemeris information of the network equipment;

[0246] Based on the wave position, operating frequency band, and satellite illumination angle, the target prior CSI fading parameters are obtained from the CSI information of the first time scale;

[0247] Based on the wave position, operating frequency band, and satellite illumination angle, the target difference is obtained from the CSI information at the second time scale;

[0248] Based on the target's prior CSI fading parameters and the target's differences, predict large-scale fading information;

[0249] Based on the predicted large-scale fading information and the NTN channel model, the first CSI parameter set is calculated.

[0250] In some implementations, the first processing unit 701 predicts large-scale fading information based on the target's prior CSI fading parameters and target differences, including:

[0251] At least the prior CSI fading parameters of the target and the target difference are weighted and summed to obtain large-scale fading information.

[0252] In some embodiments of this application, such as Figure 8 As shown, the channel state information measurement device applied to the network device side further includes: a second processing unit 702, which is configured to control the network device to perform the following operations:

[0253] The second timescale CSI information is updated based on the wave position, the operating frequency band of at least one selected terminal device, and the third CSI parameter set reported by at least one selected terminal device.

[0254] The fourth CSI parameter set is determined based on the updated second timescale CSI information, the first timescale CSI information, the satellite ephemeris information and operating frequency band of the bearer network equipment; or the fourth CSI parameter set is determined based on the third CSI parameter set reported by at least one selected terminal device.

[0255] Based on the fourth CSI parameter set, determine the signal transmission configuration information;

[0256] The signal transmission configuration information is reused for terminal devices in the same frequency band within the same wavelength range.

[0257] Specifically, the second timescale CSI information is updated based on the wave position, the operating frequency band of at least one selected terminal device, and the third CSI parameter set reported by at least one selected terminal device, including:

[0258] Smoothing filtering is applied to the third CSI parameter set reported by at least one selected terminal device;

[0259] At least a weighted average should be performed on the CSI parameter set after smoothing filtering;

[0260] The items to be updated are determined based on the wave position, the operating frequency band of at least one selected terminal device, and the satellite illumination angle; and

[0261] The CSI parameters obtained by weighted averaging are used as the historical measured CSI fading parameters of the items to be updated. The difference values ​​of the items to be updated are recalculated, and the difference values ​​of the items to be updated are used to update the items to be updated in the CSI information of the second time scale.

[0262] In some embodiments of this application, such as Figure 9 As shown, the channel state information measurement device applied to the network device side further includes: a third processing unit 703, which is configured to control the network device to perform the following operations:

[0263] Timing is triggered when the difference or difference level in the CSI information at the second time scale exceeds the first preset threshold.

[0264] If the difference or difference level in the CSI information at the second time scale is within the first preset threshold, the timing is reset.

[0265] If the timeout exceeds the preset duration, the first timescale CSI information will be updated.

[0266] This includes updating the first timescale CSI information, including:

[0267] At least the data of relevant items in the first time scale CSI information and the second time scale CSI information should be weighted and summed.

[0268] The data obtained from the correlation processing are used to update the data of the correlation items in the first time scale CSI information.

[0269] In some embodiments of this application, the first processing unit 701 is configured to control the network device to perform the following operations:

[0270] At least one terminal device is selected from one or more terminal devices that report measurement resource requests in at least one of the following ways: at least one terminal device is randomly selected from the first target terminal devices in each operating frequency band, wherein the first target terminal device is the terminal device that reports the measurement resource request;

[0271] At least one terminal device is randomly selected from the second target terminal devices in each working frequency. The second target terminal device is a terminal device that has reported measurement resource requests and has generated service exchanges at the waveform position.

[0272] Based on the data volume required by the terminal device's business, at least one terminal device is selected from the first target terminal devices in each working frequency.

[0273] Based on the prior information of the probability distribution of the difference level, at least one terminal device is selected from the first target terminal devices in each working frequency band.

[0274] It is worth noting that the above description only covers the components or modules relevant to this application, but this application is not limited thereto. The channel state information measurement device applied to the network device side in the embodiments of this application may also include other components or modules. For details regarding these components or modules, please refer to related technologies.

[0275] In addition, for the sake of simplicity, Figures 7-9 The diagram only exemplifies the connection relationships or signal flow between various components or modules; however, those skilled in the art should understand that various related technologies, such as bus connections, can be employed. The aforementioned components or modules can be implemented using hardware facilities such as processors, memory, transmitters, and receivers; this application does not impose any limitations on this.

[0276] The above embodiments are merely illustrative examples of embodiments of this application, but this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined.

[0277] Fifth aspect of the embodiment

[0278] In some embodiments, a channel state information measurement device applied to the terminal device side is also provided, such as... Figure 10As shown, the channel state information measurement device applied to the terminal device side includes: a fourth processing unit 1001, which is configured to control the terminal device to perform the following operations:

[0279] Receive the first CSI parameter set broadcast by the network device, wherein the terminal device is located in the beam coverage area provided by the network device;

[0280] Calculate the CSI difference information between the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal; and

[0281] If the CSI difference exceeds the second preset threshold, send the CSI difference information and measurement resource request to the network device.

[0282] In a further embodiment, such as Figure 11 As shown, the channel state information measurement device applied to the terminal device side further includes: a fifth processing unit 1002, which is configured to control the terminal device to perform the following operations:

[0283] Receive measurement resource configuration sent from the network device; perform measurements according to the measurement resource configuration and send a third CSI parameter set report to the network device.

[0284] Specifically, the system receives and measures the corresponding reference signal at the corresponding time-frequency resource location according to the measurement resource configuration, obtains the precise CSI information based on the reference signal, and reports the measurement results obtained from the precise CSI measurement to the network device according to the CSI reporting rules.

[0285] It is worth noting that the above description only covers the components or modules relevant to this application, but this application is not limited thereto. The channel state information measurement device applied to the terminal device side in the embodiments of this application may also include other components or modules. For details regarding these components or modules, please refer to related technologies.

[0286] In addition, for the sake of simplicity, Figure 10 and Figure 11 The diagram only exemplifies the connection relationships or signal flow between various components or modules; however, those skilled in the art should understand that various related technologies, such as bus connections, can be employed. The aforementioned components or modules can be implemented using hardware facilities such as processors, memory, transmitters, and receivers; this application does not impose any limitations on this.

[0287] The above embodiments are merely illustrative examples of embodiments of this application, but this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined.

[0288] Existing measurement mechanisms acquire CSI through frequent reference signal measurements and measurement result reporting, consuming significant time-frequency resources and unsuitable for NTN scenarios. This application, based on the periodicity and predictability of network device coverage positions, the small coverage area and short coverage time of each position, and the NTN channel characteristics dominated by Loss-of-Sight (LoS) paths and large-scale fading, designs a novel dual-time-scale CSI prediction and measurement update method. This method binds CSI information to specific positions and reduces the CSI measurement frequency, reference signal time-frequency resource consumption, and measurement result reporting overhead through CSI prediction, dual-time-scale CSI table maintenance, and multi-terminal CSI multiplexing within a position. Furthermore, this invention further reduces overall measurement and reporting overhead by multiplexing CSI among different terminals operating in the same frequency band within the same position.

[0289] This application also provides a terminal device, but the application is not limited thereto and may also include other devices.

[0290] Figure 12 A schematic diagram of a terminal device according to an embodiment of this application is shown. Figure 12 As shown, terminal device 1200 may include processor 1210 and memory 1220; memory 1220 stores data and programs and is coupled to processor 1210. It is worth noting that this figure is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunications functions or other functions.

[0291] For example, the processor 1210 can be configured to execute a program to implement a channel state information measurement method applied to the terminal device side.

[0292] like Figure 12 As shown, the terminal device 1200 may further include: a communication module 1230, an input unit 1240, a display 1250, and a power supply 1260. The functions of these components are similar to those in the prior art and will not be described in detail here. It is worth noting that the terminal device 1200 is not necessarily required to include these components. Figure 12 All of the components shown are not essential; furthermore, the terminal device 1200 may also include... Figure 12 For components not shown, please refer to existing technologies.

[0293] This application also provides a network device, such as a base station, but this application is not limited to this and may also include other network devices.

[0294] Figure 13 A schematic diagram illustrating the configuration of a network device according to an embodiment of this application is shown. Figure 13 As shown, the network device 1300 may include a processor 1310 (e.g., a central processing unit CPU) and a memory 1320; the memory 1320 is coupled to the processor 1310. The memory 1320 can store various types of data; it also stores an information processing program 1330, and executes the program 1330 under the control of the processor 1310.

[0295] For example, processor 1310 can be configured to execute a program to implement the channel state information measurement method applied to the network device side described above.

[0296] In addition, such as Figure 13 As shown, network device 1300 may also include: transceiver 1340 and antenna 1350, etc.; the functions of the above components are similar to those in the prior art, and will not be described in detail here. It is worth noting that network device 1300 is not necessarily required to include... Figure 13 All components shown; in addition, network device 1300 may also include Figure 13 For components not shown, please refer to existing technology.

[0297] This application also provides a computer-readable program, wherein when the program is executed in a network device, the program causes the computer to perform the aforementioned channel state information measurement method on the network device side, i.e., the method of the second aspect embodiment.

[0298] This application also provides a storage medium storing a computer-readable program, wherein the computer-readable program causes a computer to execute the aforementioned channel state information measurement method on the network device side in a network device, i.e., the method of the second aspect embodiment.

[0299] This application also provides a computer-readable program, wherein when the program is executed in a terminal device, the program causes the computer to perform the aforementioned channel state information measurement method on the terminal device side, i.e., the method of the third aspect embodiment.

[0300] This application also provides a storage medium storing a computer-readable program, wherein the computer-readable program causes a computer to execute the aforementioned channel state information measurement method on the terminal device side, i.e., the method of the third aspect embodiment.

[0301] The apparatus and methods described above in this application can be implemented in hardware or in combination with software. This application relates to a computer-readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to implement the various methods or steps described above. Logic components include, for example, field-programmable logic devices (FPGAs), microprocessors, and processors used in computers. This application also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, and flash memory.

[0302] The methods / apparatus described in conjunction with the embodiments of this application can be directly embodied in hardware, software modules executed by a processor, or a combination of both. For example, one or more and / or combinations of one or more functional block diagrams shown in the figures can correspond to various software modules in a computer program flow, or to various hardware modules. These software modules can correspond to the various steps shown in the figures, respectively. These hardware modules can be implemented, for example, using a field-programmable gate array (FPGA) to embed these software modules.

[0303] The software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to the processor, enabling the processor to read information from and write information to the storage medium; or the storage medium can be an integral part of the processor. The processor and storage medium can reside in an ASIC. The software module can be stored in the memory of a mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a high-capacity MEGA-SIM card or a high-capacity flash memory device, the software module can be stored in the MEGA-SIM card or the high-capacity flash memory device.

[0304] One or more and / or one or more combinations of functional blocks described in the accompanying drawings can be implemented as a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof for performing the functions described herein. One or more and / or one or more combinations of functional blocks described in the accompanying drawings can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0305] The present application has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on its spirit and principles, and these modifications and variations are also within the scope of the present application.

Claims

1. A channel state information measurement device, applied to a network device, the device comprising a first processing unit configured to control the network device to perform the following operations: Determine the first channel state information (CSI) parameter set when the network device provides services to the beam coverage area; Broadcast the first CSI parameter set to one or more terminal devices within the beam coverage area; The CSI difference information is reported from the one or more terminal devices, wherein the CSI difference information is determined by the one or more terminal devices based on the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal; Based on the CSI difference information reported from the one or more terminal devices, at least one terminal device is selected from the one or more terminal devices, and a measurement resource configuration is sent to the selected at least one terminal device according to the CSI difference information received from the selected at least one terminal device; and Receive a third set of CSI parameters that are measured and reported by at least one selected terminal device according to the measurement resource configuration.

2. The apparatus of claim 1, wherein, The first CSI parameter set for determining when the network device provides service to the beam coverage area includes: Based on the first timescale CSI information, the second timescale CSI information, the satellite ephemeris information and operating frequency band of the network device, calculate the first CSI parameter set when the network device provides services to the beam coverage area; The first time-scale CSI information is determined based on the invariant effect of geographical factors on channel fading. The second timescale CSI information is determined based on the severe impact of meteorological factors on channel fading.

3. The apparatus of claim 2, wherein, The first time-scale CSI information includes at least: the prior CSI fading parameters or the levels of prior CSI fading parameters for each beam coverage area, each operating frequency band, and satellite illumination angle; and / or the channel fading probability distribution model for each beam coverage area. Among them, the prior CSI fading parameters of each beam coverage area, each operating frequency band and satellite illumination angle are calculated based on the geographical factors and LosS probability of each beam coverage area, and / or calculated based on the channel fading probability distribution model of each beam coverage area. Among them, the channel fading probability distribution model of each beam coverage area is derived from the channel fading parameters and Loss probability inference of each working frequency band and satellite illumination angle measured under the geographical location information of each beam coverage area.

4. The apparatus of claim 2, wherein, The second timescale CSI information includes at least the differences or difference levels between the historical measured CSI fading parameters of each beam coverage area, each operating frequency band, and satellite illumination angle and the prior CSI fading parameters of each beam coverage area, each operating frequency band, and satellite illumination angle.

5. The apparatus of claim 2, wherein, Based on the first timescale CSI information, the second timescale CSI information, the satellite ephemeris information and operating frequency band of the network equipment, the first CSI parameter set for the network equipment to provide services to the beam coverage area is calculated, including: Calculate the satellite illumination angle based on the satellite ephemeris information carrying the network device; Based on the beam coverage area, the operating frequency band, and the satellite illumination angle, the target prior CSI fading parameters are obtained from the first time-scale CSI information; Based on the beam coverage area, the operating frequency band, and the satellite illumination angle, the target difference is obtained from the CSI information at the second time scale; Based on the target's prior CSI fading parameters and the target's differences, predict large-scale fading information; and The first CSI parameter set is calculated based on the large-scale fading information and the non-terrestrial network (NTN) channel model.

6. The apparatus of claim 5, wherein, Based on the target's prior CSI fading parameters and the target's differences, predict large-scale fading information, including: The large-scale fading information is obtained by weighted summation of the target prior CSI fading parameters and the target differences.

7. The apparatus of claim 2, wherein, The device further includes a second processing unit configured to control the network device to perform the following operations: The second timescale CSI information is updated based on the beam coverage area, the operating frequency band of the selected at least one terminal device, and the third CSI parameter set reported by the selected at least one terminal device. The fourth CSI parameter set is determined based on the updated second timescale CSI information, the first timescale CSI information, the satellite ephemeris information and operating frequency band of the network device; or the fourth CSI parameter set is determined based on the third CSI parameter set reported by at least one selected terminal device. Based on the fourth CSI parameter set, determine the signal transmission configuration information; as well as The signal transmission configuration information is reused for terminal devices in the same frequency band within the beam coverage area.

8. The apparatus of claim 7, wherein, The second timescale CSI information is updated based on the beam coverage area, the operating frequency band of the selected at least one terminal device, and the third CSI parameter set reported by the selected at least one terminal device, including: Smoothing filtering is applied to the third CSI parameter set reported by at least one selected terminal device; At least the CSI parameter set after the smoothing filter is weighted and averaged. Based on the beam coverage area, the operating frequency band of the selected at least one terminal device, and the satellite illumination angle, the items to be updated are determined; and The CSI parameters obtained by the weighted averaging process are used as the historical measured CSI fading parameters of the item to be updated. The difference value of the item to be updated is recalculated, and the difference value of the item to be updated is used to update the item to be updated in the second time scale CSI information.

9. The apparatus of claim 7, wherein, The device further includes a third processing unit configured to control the network device to perform the following operations: When the difference or difference level in the CSI information of the second time scale exceeds the first preset threshold, timing is triggered; If the difference or difference level in the CSI information of the second time scale is within the first preset threshold, the timing is reset; If the timeout exceeds the preset duration, the CSI information of the first time scale will be updated.

10. The apparatus of claim 9, wherein, Updating the CSI information at the first time scale includes: At least the data of relevant items in the first time scale CSI information and the second time scale CSI information are subjected to weighted summation; The data obtained from the correlation processing are used to update the data of the correlation items in the first time scale CSI information.

11. The apparatus of claim 1, wherein, The first processing unit is configured to control the network device to perform the following operations: Select at least one terminal device from one or more terminal devices that reported the measurement resource request, using at least one of the following methods: At least one terminal device is randomly selected from the first target terminal devices in each working frequency band, wherein the first target terminal device is the terminal device that reports the measurement resource request; At least one terminal device is randomly selected from the second target terminal devices in each operating frequency. The second target terminal device is a terminal device that has reported a measurement resource request and has generated service exchange in the beam coverage area. Based on the data volume required by the terminal device's business, at least one terminal device is selected from the first target terminal devices in each working frequency. Based on the prior information of the probability distribution of the difference level, at least one terminal device is selected from the first target terminal devices in each working frequency band.

12. A channel state information measurement device, applied to a terminal device, the device comprising a fourth processing unit configured to control the terminal device to perform the following operations: The terminal device receives a first channel state information (CSI) parameter set broadcast by a network device, wherein the terminal device is located in the beam coverage area provided by the network device; Calculate the CSI difference information between the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal; and If the CSI difference information exceeds a second preset threshold, the CSI difference information and a measurement resource request are sent to the network device.

13. The apparatus of claim 12, wherein, The device further includes a fifth processing unit configured to control the terminal device to perform the following operations: Receive measurement resource configuration sent from the network device; and Measurements are performed according to the measurement resource configuration, and a third CSI parameter set is reported to the network device.

14. A channel state information measurement method, applied to a network device, comprising: Determine the first channel state information (CSI) parameter set when the network device provides services to the beam coverage area; Broadcast the first CSI parameter set to one or more terminal devices within the beam coverage area; The CSI difference information is reported from the one or more terminal devices, wherein the CSI difference information is determined by the one or more terminal devices based on the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal; Based on the CSI difference information reported from the one or more terminal devices, at least one terminal device is selected from the one or more terminal devices, and a measurement resource configuration is sent to the selected at least one terminal device according to the CSI difference information received from the selected at least one terminal device; and Receive a third set of CSI parameters that are measured and reported by at least one selected terminal device according to the measurement resource configuration.

15. A channel state information measurement method, applied to a terminal device, comprising: The terminal device receives a first channel state information (CSI) parameter set broadcast by a network device, wherein the terminal device is located in the beam coverage area provided by the network device; Calculate the CSI difference information between the first CSI parameter set and the second CSI parameter set obtained by measuring a specific reference signal; as well as If the CSI difference information exceeds a second preset threshold, the CSI difference information and a measurement resource request are sent to the network device.

16. The method of claim 15, wherein, Also includes: Receive measurement resource configuration sent from the network device; as well as Measurements are performed according to the measurement resource configuration, and a third CSI parameter set is reported to the network device.

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