Method for transmitting a priori channel information

Abstract

A wireless communication method for use in a user terminal includes: receiving prior channel information from a network entity or a first wireless network node related to at least one channel between each of at least one wireless terminal and each of at least one second wireless network node; and determining at least one characteristic of the user terminal based on the prior channel information.

Description

Technical Field

[0001] This document generally deals with wireless communication, and in particular with fifth-generation (5G) new radio (NR) wireless communication. Background Technology

[0002] In existing technologies, time- and angle-based methods exist for locating mobile terminals, such as time of arrival (TOA), receive signal time difference (RSTD), multiple round-trip time (RTT), angle of departure (AOD), and angle of arrival (AOA). However, the performance of these methods largely depends on whether the mobile terminal's link (e.g., channel) is a line-of-sight (LOS) link. When the probability of the mobile device's link being a LOS link is low, the performance of these methods degrades.

[0003] Furthermore, the characteristics of mobile terminal links can be so complex that it is difficult for a mobile terminal to obtain sufficient information simply by receiving a reference signal. Additionally, when a mobile terminal is moving, it may need to predict channel quality, which is also difficult to achieve by simply receiving a reference signal.

[0004] Therefore, how to locate mobile terminals and predict channel quality has become a topic that needs to be discussed. Summary of the Invention

[0005] This document relates to wireless communication methods, user terminals, wireless network nodes, network entities, and wireless terminals for transmitting prior channel information used to determine one or more characteristics of a user terminal.

[0006] This disclosure relates to a wireless communication method for use in a user terminal. The wireless communication method includes:

[0007] Receive prior channel information related to at least one channel between each of at least one wireless terminal and each of at least one second wireless network node from a network entity or a first wireless network node, and

[0008] At least one characteristic of the user terminal is determined based on prior channel information.

[0009] Various embodiments may preferably implement the following features:

[0010] Preferably, the wireless communication method further includes:

[0011] Receive a reference signal from at least one second wireless network node on at least one channel.

[0012] Determining local channel information based on reference signals, and

[0013] At least one characteristic is determined based on prior channel information and local channel information.

[0014] Preferably, the prior channel information includes at least one of the following: channel impulse response (CIR); reference signal received power (RSRP); relative RSRP; path loss; relative path loss; path loss model; first path of arrival time; time difference of arrival; first path of arrival power; first path of arrival power probability distribution function (PDF) of the first path of arrival power; average additional delay; delay spread; delay from the strongest power path to the first path of arrival; kurtosis; kurtosis PDF; skewness; skewness PDF; angle information, including at least one of the following: zenith angle of arrival, azimuth angle of arrival, zenith angle of departure, or azimuth angle of departure; angle spread information, including at least one of the following: spread of zenith angle of arrival, spread of azimuth angle of arrival, spread of zenith angle of departure, or spread of azimuth angle of departure; angle spread PDF of angle spread, Rician K factor; Rician K factor PDF of Rician K factor; confidence level of prior channel information; coordinates of each of at least one second wireless network node, or coordinates of each of at least one wireless terminal.

[0015] Among other things, prior channel information including CIR has the beneficial effect of predicting / estimating the CIR of a user terminal, because a training set or fingerprint and / or other kinds of channel characteristics can be extracted from the CIR for use in the user terminal.

[0016] Among other things, prior channel information including RSRP has the beneficial effect of predicting / estimating the RSRP of a user terminal as a training set or fingerprint, and estimating the location of a user terminal when combined with the user terminal's local channel information (e.g., RSRP) and one or more coordinates of at least one second wireless network node and / or one or more coordinates of at least one wireless terminal.

[0017] Among other things, prior channel information including relative RSRP has the following advantages: when using different types of wireless (user) terminals, the same or similar relative RSRPs can be obtained, the relative RSRPs of user terminals can be predicted / estimated as a training set or fingerprint, and the location of user terminals can be estimated when combined with the local channel information of user terminals (e.g., relative RSRP) and one or more coordinates of at least one second wireless network node and / or one or more coordinates of at least one wireless terminal.

[0018] Among other things, prior channel information including path loss has the ability to predict / estimate the path loss of the user terminal as a training set or fingerprint, estimate the location of the user terminal when combined with the user terminal's local channel information and one or more coordinates of at least one second wireless network node and / or one or more coordinates of at least one wireless terminal, and is beneficial for the user terminal's cell selection.

[0019] Among other things, prior channel information including relative path loss has the following advantages: the same or similar relative path loss can be obtained when using different types of wireless terminals; the relative path loss of the user terminal can be predicted / estimated as a training set or fingerprint; the location of the user terminal can be estimated when combined with the local channel information of the user terminal and one or more coordinates of at least one second wireless network node and / or at least one wireless terminal, and it is beneficial for cell selection of the user terminal.

[0020] Among other things, prior channel information, including path loss models, has the beneficial effect of estimating the relative distance between a user terminal and at least one second wireless network node for localization when combined with the user terminal's local path loss.

[0021] Among other things, prior channel information including RSRQ has the beneficial effect of predicting / estimating the RSRQ of a user terminal as a training set or fingerprint, and estimating the location of the user terminal when combined with the user terminal's local channel information.

[0022] Among other things, prior channel information including relative RSRQ has the following advantages: the same or similar relative RSRQ can be obtained when using different types of wireless terminals; the relative RSRQ of the user terminal can be predicted / estimated as a training set or fingerprint; and the location of the user terminal can be estimated when combined with the local channel information of the user terminal.

[0023] Among other things, prior channel information including the first path-of-arrival time has the beneficial effect of predicting / estimating the first path-of-arrival time of a user terminal as a training set or fingerprint and of localization use (e.g., time of arrival (TOA) methods).

[0024] Among other things, prior channel information including time difference of arrival has the beneficial effect of predicting / estimating the time difference of arrival of user terminals as a training set or fingerprint and of positioning applications (e.g., the received signal time difference (RSTD) method).

[0025] Among other things, prior channel information including the first path power has the beneficial effect of predicting / estimating the first path power of the user terminal as a training set or fingerprint and identifying LOS and NLOS links, since the first path power of the LOS link will generally be greater than that of the NLOS link.

[0026] Among other things, prior channel information, including the first path-of-arrival power PDF, has the beneficial effect of identifying LOS and NLOS links when combined with the user terminal's local channel information.

[0027] Among other things, prior channel information, including average additional delay, has the beneficial effect of serving as a training set or fingerprint to predict / estimate the average additional delay of user terminals.

[0028] Among other things, prior channel information, including delay spread, has the beneficial effect of predicting / estimating the delay spread of user terminals as a training set or fingerprint.

[0029] Among other things, prior channel information, including the delay from the strongest power path to the first arrival path, has the beneficial effect of predicting / estimating the delay from the strongest power path to the first arrival path of the user terminal as a training set or fingerprint, and identifying LOS and NLOS links.

[0030] Among other things, prior channel information, including the delay-extended PDF, has the beneficial effect of identifying LOS and NLOS links.

[0031] Among other things, prior channel information including kurtosis has the beneficial effects of predicting / estimating the kurtosis of a user terminal as a training set or fingerprint, identifying LOS and NLOS links, and estimating the location of a user terminal when combined with the user terminal's local channel information.

[0032] Among other things, prior channel information, including kurtosis PDF, has the beneficial effect of identifying LOS and NLOS links when combined with local channel information of the user terminal.

[0033] Among other things, prior channel information including skewness has the beneficial effects of predicting / estimating the skewness of a user terminal as a training set or fingerprint, identifying LOS and NLOS links, and estimating the location of a user terminal when combined with the user terminal's local channel information.

[0034] Among other things, prior channel information, including skewed PDF, has the beneficial effect of identifying LOS and NLOS links when combined with local channel information of the user terminal.

[0035] Among other things, prior channel information including angles has the beneficial effects of predicting / estimating the angle of a user terminal as a training set or fingerprint and of using localization (e.g., angle-based methods).

[0036] Among other things, prior channel information, including angle spread, has the beneficial effect of predicting / estimating the angle spread of user terminals as a training set or fingerprint.

[0037] Among other things, prior channel information, including angle-extended PDF, has the beneficial effect of identifying LOS and NLOS links.

[0038] Among other things, prior channel information, including the Rician K factor, has the beneficial effect of predicting / estimating the Rician K factor of a user terminal as a training set or fingerprint.

[0039] Among other things, prior channel information, including the Rician K-factor PDF, has the beneficial effect of identifying LOS and NLOS links.

[0040] Among other things, prior channel information, including confidence level, has the following beneficial effect: when a confidence level is provided in the prior channel information, the user terminal confirms whether the prior channel information is reliable.

[0041] Among other things, prior channel information including the coordinates of at least one second wireless network node or at least one wireless terminal has the beneficial effect of estimating the location of the user terminal when combined with the user terminal's local channel information.

[0042] Preferably, the wireless communication method further includes sending a signal to a network entity or a first wireless network node instructing the user terminal on its ability to receive prior channel information.

[0043] Preferably, the wireless communication method further includes sending a request for prior channel information to a network entity or a first wireless network node.

[0044] Preferably, the wireless communication method further includes sending a signal to a network entity or a first wireless network node indicating the contents included in the prior channel information.

[0045] Preferably, at least one characteristic of the user terminal includes at least one of the following: at least one channel characteristic of at least one channel of the user terminal, the location of the user terminal, information indicating whether at least one channel of the user terminal is a line-of-sight (LOS) channel or a non-LOS (NLOS) channel, or the speed of the user terminal.

[0046] Preferably, the wireless communication method further includes sending at least one feature to the network entity or the first wireless network node.

[0047] Preferably, the wireless communication method further includes:

[0048] Receive control information from the first wireless network node to configure reference signals and / or data channel transmission between the wireless terminal and the first wireless network node based on at least one characteristic, and

[0049] The transmission with the first wireless network node is executed based on the control information.

[0050] Preferably, at least one second wireless network node includes the first wireless network node.

[0051] Preferably, the network entity resides in at least one of the core network, the first wireless network node, or at least one second wireless network node.

[0052] This disclosure relates to a wireless communication method for use in a first wireless network node. The wireless communication method includes transmitting prior channel information associated with at least one channel between each of at least one wireless terminal and each of at least one second wireless network node.

[0053] Various embodiments may preferably implement the following features:

[0054] Preferably, the priority channel information is broadcast to at least one user terminal or sent to a user terminal.

[0055] Preferably, the prior channel information includes at least one of the following: channel impulse response (CIR); reference signal received power (RSRP); relative RSRP; path loss; relative path loss; path loss model; first path of arrival time; time difference of arrival; first path of arrival power; first path of arrival power probability distribution function (PDF) of the first path of arrival power; average additional delay; delay spread; delay from the strongest power path to the first path of arrival; kurtosis; kurtosis PDF; skewness; skewness PDF; angle information, including at least one of the following: zenith angle of arrival, azimuth angle of arrival, zenith angle of departure, or azimuth angle of departure; angle spread information, including at least one of the following: spread of zenith angle of arrival, spread of azimuth angle of arrival, spread of zenith angle of departure, or spread of azimuth angle of departure; angle spread PDF of angle spread, Rician K factor; Rician K factor PDF of Rician K factor; confidence level of prior channel information; coordinates of each of at least one second wireless network node, or coordinates of each of at least one wireless terminal.

[0056] Preferably, the wireless communication method further includes receiving from the user terminal a signal instructing the user terminal to receive prior channel information.

[0057] Preferably, the wireless communication method further includes receiving a request for prior channel information from a user terminal.

[0058] Preferably, prior channel information is transmitted periodically, aperiodically, or semi-continuously.

[0059] Preferably, the wireless communication method further includes receiving from the user terminal a signal indicating content included in the prior channel information.

[0060] Preferably, the wireless communication method further includes receiving from the user terminal at least one characteristic of the user terminal determined based on prior channel information.

[0061] Preferably, at least one characteristic of the user terminal includes at least one of the following: channel characteristics of at least one channel of the user terminal, location of the user terminal, information indicating whether at least one channel of the user terminal is a line-of-sight (LOS) channel or a non-LOS (NLOS) channel, or speed of the user terminal.

[0062] Preferably, the wireless communication method further includes:

[0063] Sending control information to the user terminal based on at least one characteristic of the wireless terminal to configure the transmission of reference signals and / or data channels, and

[0064] The transmission of control information to the user terminal is based on the execution of control information.

[0065] Preferably, at least one second wireless network node includes the first wireless network node.

[0066] Preferably, the wireless communication method further includes receiving prior channel information from a network entity, wherein the network entity resides in at least one of a core network, a first wireless network node, or at least one second wireless network node.

[0067] This disclosure relates to a wireless communication method for use in a wireless terminal. The wireless communication method includes:

[0068] Receive a reference signal from at least one wireless network node on at least one channel.

[0069] Based on the reference signal, determine the channel information associated with at least one channel, and

[0070] Send channel information to network entities.

[0071] Various embodiments may preferably implement the following features:

[0072] Preferably, the channel information includes at least one of the following: channel impulse response (CIR); reference signal received power (RSRP); relative RSRP; path loss; relative path loss; path loss model; first path-of-arrival time; time difference of arrival; first path-of-arrival power; first path-of-arrival power probability distribution function (PDF); average additional delay; delay spread; delay from the strongest power path to the first path-of-arrival; kurtosis; kurtosis PDF; skewness; skewness PDF; angle information, including at least one of the following: zenith angle of arrival, azimuth angle of arrival, zenith angle of departure, or azimuth angle of departure; angle spread information, including at least one of the following: zenith angle spread, azimuth angle spread, zenith angle spread, or azimuth angle spread; angle spread PDF; Rician K-factor; Rician K-factor PDF; confidence level of prior channel information; coordinates of each of at least one wireless network node, or coordinates of a wireless terminal.

[0073] Preferably, the network entity resides in at least one of the core network or at least one wireless network node.

[0074] This disclosure relates to a wireless communication method for use in a network entity. The wireless communication method includes:

[0075] Receive channel information associated with at least one channel between each of the at least one wireless terminal and each of the at least one wireless network node, as prior channel information, and

[0076] Send prior channel information to the user terminal.

[0077] Various embodiments may preferably implement the following features:

[0078] Preferably, the prior channel information includes at least one of the following: channel impulse response (CIR); reference received power (RSRP); relative RSRP; path loss; relative path loss; path loss model; first path-of-arrival time; time difference of arrival; first path-of-arrival power; first path-of-arrival power probability distribution function (PDF) of the first path-of-arrival power; average additional delay; delay spread; delay from the strongest power path to the first path-of-arrival; kurtosis; kurtosis PDF; skewness; skewness PDF; angle information, including at least one of the following: zenith angle of arrival, azimuth angle of arrival, zenith angle of departure, or azimuth angle of departure; angle spread information, including at least one of the following: spread of zenith angle of arrival, spread of azimuth angle of arrival, spread of zenith angle of departure, or spread of azimuth angle of departure; angle spread PDF of angle spread, Rician K factor; Rician K factor PDF of Rician K factor; confidence level of prior channel information; coordinates of each of at least one wireless network node, or coordinates of each of at least one wireless terminal.

[0079] Preferably, the network entity resides in at least one of the core network or at least one wireless network node.

[0080] Preferably, the wireless communication method further includes receiving from the user terminal a signal instructing the user terminal to receive prior channel information.

[0081] Preferably, the wireless communication method further includes receiving a request for prior channel information from a user terminal.

[0082] Preferably, the wireless communication method further includes receiving from the user terminal a signal indicating content included in the prior channel information.

[0083] This disclosure relates to a user terminal. The user terminal includes:

[0084] A communication unit configured to receive, from a network entity or a first wireless network node, prior channel information relating to at least one channel between each of at least one wireless terminal and each of at least one second wireless network node, and

[0085] A processor configured to determine at least one characteristic of a user terminal based on prior channel information.

[0086] Various embodiments may preferably implement the following features:

[0087] Preferably, the processor is also configured to perform any of the foregoing methods as a wireless communication method.

[0088] This disclosure relates to a first wireless network node. The first wireless network node includes a communication unit configured to transmit prior channel information associated with at least one channel between each of at least one wireless terminal and each of at least one second wireless network node.

[0089] Various embodiments may preferably implement the following features:

[0090] Preferably, the first wireless network node further includes a processor configured for any of the aforementioned wireless communication methods.

[0091] This disclosure relates to a wireless terminal. The wireless terminal includes:

[0092] A communication unit configured to receive a reference signal from at least one wireless network node on at least one channel, and

[0093] A processor configured to determine channel information associated with at least one channel based on a reference signal.

[0094] The communication unit is also configured to send channel information to network entities.

[0095] Various embodiments may preferably implement the following features:

[0096] Preferably, the processor is also configured to perform any of the foregoing methods as a wireless communication method.

[0097] This disclosure relates to a network entity. The network entity includes:

[0098] Communication unit, the communication unit being configured to:

[0099] Receive channel information associated with at least one channel between each of the at least one wireless terminal and each of the at least one wireless network node, as prior channel information, and

[0100] Send prior channel information to the user terminal.

[0101] Various embodiments may preferably implement the following features:

[0102] Preferably, the network entity further includes a processor configured as a wireless communication method of any of the foregoing methods.

[0103] This disclosure relates to a computer program product including computer-readable program medium code stored thereon, which, when executed by a processor, causes the processor to implement any of the aforementioned methods of a wireless communication method.

[0104] The exemplary embodiments disclosed herein relate to features that will become apparent from the following description taken in conjunction with the accompanying drawings. Exemplary systems, methods, apparatuses, and computer program products are disclosed herein according to various embodiments. However, it should be understood that these embodiments are presented by way of example and not limitation, and that various modifications may be apparent to those skilled in the art who have read this disclosure while remaining within the scope of this disclosure.

[0105] Therefore, this disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, the specific order and / or hierarchy of steps in the methods disclosed herein are merely exemplary methods. Based on design preferences, the specific order or hierarchy of steps in the disclosed methods or processes may be rearranged while remaining within the scope of this disclosure. Therefore, those skilled in the art will understand that the methods and techniques disclosed herein present various steps or actions in a sample order, and that this disclosure is not limited to the specific order or hierarchy presented, unless otherwise expressly stated. Attached Figure Description

[0106] The above and other aspects and their embodiments are described in more detail in the accompanying drawings, description and claims.

[0107] Figure 1 An example of a schematic diagram of a wireless terminal according to an embodiment of the present disclosure is shown.

[0108] Figure 2 An example of a schematic diagram of a wireless network node according to an embodiment of the present disclosure is shown.

[0109] Figure 3 A schematic diagram of a wireless communication system according to an embodiment of the present disclosure is shown.

[0110] Figure 4 A schematic diagram of a wireless communication system according to an embodiment of the present disclosure is shown. Detailed Implementation

[0111] Figure 1This is a schematic diagram relating to a wireless terminal 10 according to an embodiment of the present disclosure. The wireless terminal 10 may be a user equipment (UE), mobile phone, laptop, tablet computer, e-book reader, or portable computer system, and is not limited thereto. The wireless terminal 10 may include a processor 100 (such as a microprocessor or application-specific integrated circuit (ASIC)), a storage unit 110, and a communication unit 120. The storage unit 110 may be any data storage device storing program code 112 accessed and executed by the processor 100. Embodiments of the storage unit 112 include, but are not limited to, a subscriber identity module (SIM), read-only memory (ROM), flash memory, random-access memory (RAM), hard disk, and optical data storage devices. The communication unit 120 may be a transceiver and is used to send and receive signals (e.g., messages or packets) according to the processing results of the processor 100. In embodiments, the communication unit 120 communicates via... Figure 1 At least one antenna 122 shown transmits and receives signals.

[0112] In this embodiment, storage unit 110 and program code 112 may be omitted, and processor 100 may include storage unit with the stored program code.

[0113] The processor 100 may implement any of the steps in the exemplary embodiment on the wireless terminal 10, for example by executing program code 112.

[0114] Communication unit 120 may be a transceiver. Alternatively or additionally, communication unit 120 may be combined with a transmitting unit and a receiving unit configured to transmit signals to and receive signals from a wireless network node (e.g., a base station).

[0115] Figure 2This diagram illustrates a wireless network node 20 according to an embodiment of the present disclosure. The wireless network node 20 may be a satellite, base station (BS), network entity, mobility management entity (MME), serving gateway (S-GW), packet data network (PDN) gateway (P-GW), radio access network (RAN), next-generation RAN (NG-RAN), data network, core network, or radio network controller (RNC), and is not limited thereto. The wireless network node 20 may include a processor 200 such as a microprocessor or ASIC, a storage unit 210, and a communication unit 220. The storage unit 210 may be any data storage device storing program code 212 accessed and executed by the processor 200. Examples of storage units 212 include, but are not limited to, SIM, ROM, flash memory, RAM, hard disk, and optical data storage devices. The communication unit 220 may be a transceiver and is used to send and receive signals (e.g., messages or packets) based on the processing results of the processor 200. In this example, the communication unit 220 communicates via… Figure 2 At least one antenna 222 shown transmits and receives signals.

[0116] In this embodiment, the storage unit 210 and the program code 212 may be omitted. The processor 200 may include a storage unit containing the stored program code.

[0117] The processor 200 can implement any of the steps described in the exemplary embodiments on the wireless network node 20, for example by executing program code 212.

[0118] Communication unit 220 may be a transceiver. Alternatively or additionally, communication unit 220 may be combined with a transmitting unit and a receiving unit configured to transmit signals to and receive signals from a wireless terminal (e.g., user equipment).

[0119] In this disclosure, a link may be equated with a channel.

[0120] This disclosure provides a wireless communication system including at least one wireless terminal, a network entity, at least one BS (e.g., a wireless network node), and at least one UE (e.g., a handheld device). In embodiments, the wireless terminal is configured to determine (e.g., detect) its channel information and transmit the channel information to the network entity. The network entity is configured to collect and store the channel information from one or more wireless terminals as prior channel information, and transmit the prior channel information to the UE, for example, via one or more BSs. Based on the prior channel information, the UE can more accurately determine (e.g., predict) one or more of its characteristics (e.g., one or more channel characteristics, location, link being one or more line-of-sight (LOS) links and / or one or more non-line-of-sight (NLOS) or speed).

[0121] More specifically, a wireless terminal is a specialized piece of equipment whose location (e.g., coordinates) can be measured using some tools. For example, a wireless terminal can be an anchor, a landmark, a sensor, and / or a mobile platform. In an embodiment, the wireless terminal is configured to receive signals (e.g., reference signals) from each of one or more channels in a BS, determine its channel information (i.e., one or more channel characteristics) for one or more channels based on the reference signals, and transmit the channel information to a network entity.

[0122] In an embodiment, one or more BSs that transmit signals to a wireless terminal may also be one or more anchors, one or more landmarks, and / or one or more mobile platforms.

[0123] In an embodiment, one or more channel characteristics detected (e.g., determined) by the wireless terminal may include at least one channel characteristic from Table I as shown below:

[0124] Table I: Channel Characteristics

[0125]

[0126]

[0127]

[0128]

[0129]

[0130]

[0131]

[0132]

[0133]

[0134]

[0135]

[0136]

[0137] In one embodiment, the network entity may be a database and is configured to collect (e.g., receive) and store channel information from one or more wireless terminals as prior channel information. In another embodiment, the database sends the prior channel information to at least one UE. In yet another embodiment, the database resides in the core network of the wireless communication system. Also in another embodiment, the database resides in at least one BS.

[0138] In one embodiment of a network entity residing in the core network, the network entity sends prior channel information of one or more radio terminals to one or more UEs, either directly or via one or more BSs. In another embodiment, an interface exists between the network entity and one or more UEs, and the network entity can send prior channel information directly to one or more UEs. In yet another embodiment, the network entity sends prior channel information to one or more UEs via one or more BSs. In this embodiment, the prior channel information may be transparent to one or more BSs.

[0139] In embodiments where a network entity resides in one or more BSs, the network entity sends prior channel information to one or more BSs. In embodiments, one or more BSs broadcast prior channel information to one or more UEs within the coverage area of ​​one or more BSs. In embodiments, the BS sends prior channel information to a specific UE.

[0140] In embodiments, prior channel information can be transmitted on demand, aperiodically, semi-persistently, or periodically. For example, a network entity and / or one or more BSs (e.g., one or more BSs where the network entity resides or one or more BSs with prior channel information) can receive a request for prior channel information from one or more UEs and transmit prior channel information in response. In embodiments, the network entity and / or one or more BSs can transmit prior channel information aperiodically. In embodiments, the network entity and / or one or more BSs can transmit prior channel information semi-persistently (e.g., periodically transmitting prior channel information over a specific duration).

[0141] In this embodiment, the network entity and / or one or more BSs may receive signals (e.g., signaling) indicating the ability to receive (e.g., decode) prior channel information from one or more UEs. In this embodiment, the network entity and / or one or more BSs may send the prior channel information only to one or more UEs that report having the ability to receive prior channel information.

[0142] In this embodiment, a network entity and / or one or more BSs may receive a signal from one or more UEs indicating content (i.e., certain channel characteristics) included in the prior channel information. In this embodiment, the network entity and / or one or more BSs may include one or more channel characteristics indicated by the signal in the prior channel information sent to one or more UEs. In this embodiment, the indicated one or more channel characteristics may be at least one of those shown in Table I.

[0143] After receiving prior channel information from a network entity and / or one or more BSs, the UE determines (e.g., predicts or estimates) one or more of its characteristics based on the prior channel information. In embodiments, the one or more characteristics determined based on the prior channel information may be one or more channel characteristics of the UE. In embodiments, the one or more characteristics determined based on the prior channel information may be the location of the UE. In embodiments, the one or more characteristics determined based on the prior channel information may be information indicating whether each of the UE's links (e.g., channels) is a line-of-sight (LOS) or non-LOS (NLOS) link. In embodiments, the one or more characteristics determined based on the prior channel information may be the speed of the UE. In other words, the UE may utilize the prior channel information as a reference to determine its channel characteristics, determine its location, identify whether its link is a LOS link or an NLOS link, and / or determine its speed.

[0144] In an embodiment, the UE receives reference signals from one or more BSs on one or more channels, determines the channel characteristics of one or more channels as local channel information based on the reference signals, and determines (e.g., predicts) one or more characteristics based on both prior channel information and local channel information.

[0145] In this embodiment, the UE sends one or more characteristics determined based on prior channel information (and local channel information) to a network entity and / or one or more BSs for further operation. For example, one or more BSs may configure reference signal and / or data channel transmission based on one or more characteristics of the UE, send corresponding control information to the UE, and perform transmission based on the control information. As a result, the transmission performance between the UE and one or more BSs is improved.

[0146] Figure 3A schematic diagram of a wireless communication system according to an embodiment of the present disclosure is shown. Figure 3 In this context, wireless communication includes four network base stations (BS1, BS2, BS3, and BS4), two computer users (UE1 and UE2), four wireless terminals (WT1, WT2, WT3, and WT4), and a database (i.e., network entities). In this embodiment, WT1, WT2, WT3, and WT4, as well as UE1 and UE2, can be respectively... Figure 1 The wireless terminal implementation shown herein, and BS1, BS2, BS3, and BS4, as well as the database, can be respectively provided by... Figure 2 The wireless network node implementation is shown in the diagram. Note that the number of BS, UE, wireless terminals, and / or databases can vary and is not limited to this. Figure 3 The quantities are shown in the figure. In an embodiment, UE1 and / or UE2 receive prior channel information associated with one or more channels between each of WT1, WT2, WT3, and WT4 and each of BS1, BS2, BS3, and BS4, and determine one or more characteristics based on the prior channel information. For example, the determined characteristics may include location information, speed information, channel information, and / or information on whether the link is LOS or NLOS. Due to the prior channel information, the determined one or more characteristics will be more accurate.

[0147] More specifically, each of WT1, WT2, WT3, and WT4 may be a special device whose location (e.g., coordinates) can be measured by some tools. In these embodiments, wireless terminals WT1, WT2, WT3, and WT4 are configured to receive signals (e.g., reference signals) transmitted from BS1, BS2, BS3, and BS4, and determine their channel information as prior channel information collected by a database.

[0148] exist Figure 3 In the embodiment shown, the database may reside in at least one of the four BSs, or as a separate network entity connected to at least one of the four BSs. Furthermore, the database collects and stores prior channel information from wireless terminals WT1, WT2, WT3, and WT4, as well as the corresponding positions of wireless terminals WT1, WT2, WT3, and WT4 in the coordinate system.

[0149] exist Figure 3 In the embodiments shown, BS1, BS2, BS3, and BS4 are configured to transmit / receive signals from UE1 and UE2 and / or WT1, WT2, WT3, and WT4. In one embodiment, a BS connected to UE1 and UE2 (i.e., one or more serving BSs of UE1 and UE2) transmits prior channel information to UE1 and UE2. In another embodiment, a BS with prior channel information may broadcast the prior channel information to one or more UEs within the coverage area of ​​the BS with prior channel information.

[0150] exist Figure 3 In this configuration, UE1 or UE2 can interact with its serving BS. That is, UE1 or UE2 can transmit channels / signals and / or receive channels / signals from the serving BS. In this embodiment, UE1 or UE2 can receive and decode prior channel information and apply the received prior channel information to predict channel information, location information, LOS / NLOS identifiers, or speed.

[0151] Figure 4 A schematic diagram of a wireless communication system according to an embodiment of this application is shown. Figure 4 The wireless communication system shown is similar to Figure 3 The wireless communication system shown in the diagram uses the same notation for components with similar functions. In this embodiment, WT1, WT2, WT3, and WT4 receive signals from all BSs BS1, BS2, BS3, and BS4, and accordingly determine the channel information of one or more links (i.e., one or more channels) between each of WT1, WT2, WT3, and WT4 and each of BS1, BS2, BS3, and BS4. For example, WT1, WT2, WT3, and WT4 can determine the channel impulse response (CIR) of one or more links. In this embodiment, the CIR between the i-th wireless terminal and the j-th base station is determined by h. i,j (t) represents, where 1≤i≤4 and 1≤j≤4. Note that the first wireless terminal can be wireless terminal WT1, the second wireless terminal can be wireless terminal WT2, and so on. Similarly, the first BS can be BS1, the second BS can be BS2, and so on. In an embodiment, wireless terminals WT1, WT2, WT3, and WT4 can determine one or more reference signal received power (RSRP) of the link between each of wireless terminals WT1, WT2, WT3, and WT4 and each of BSs BS1, BS2, BS3, and BS4. In an embodiment, the RSRP between the i-th wireless terminal and the j-th base station is determined by the RSRP. i,j This indicates that 1 ≤ i ≤ 4 and 1 ≤ j ≤ 4. In the embodiment, WT1, WT2, WT3, and WT4 can determine their location information (e.g., coordinates). For example, the location information of the i-th wireless terminal can be represented as [x... i y i z i ].

[0152] exist Figure 4In this process, the database collects all location information (e.g., coordinates) and channel information (e.g., RSRP) for wireless terminals WT1, WT2, WT3, and WT4. That is, the prior channel information includes both location information and channel information. In an embodiment, the location information collected by the database can be represented as follows:

[0153] Where [x] i y i z i [] represents the coordinates of the i-th wireless terminal. Furthermore, the RSRP collected from the database can be represented as follows:

[0154]

[0155] Next, the database can send the prior channel information to UE1. Figure 4 In this embodiment, the database sends prior channel information to UE1 via BS1. UE1 can also receive signals from BS1, BS2, BS3, and BS4, and determine local channel information accordingly. For example, the local RSRP of the link between UE1 and each of BS1, BS2, BS3, and BS4 can be calculated, and it can be represented as follows:

[0156] [RSRP1 RSRP2 RSRP3 RSRP4]

[0157] Based on the received prior channel information and the calculated local channel information, UE1 can determine (e.g., predict or estimate) its location.

[0158] For example, at least one of the following algorithms can be used to estimate location:

[0159] 1. A path loss model (if set in prior channel information) can be used to estimate the relative distance between the wireless terminal and the BS, and then the location can be estimated by following a triangulation-based approach.

[0160] 2. KNN (k-nearest neighborhood) can find some nearest neighbors (e.g., anchors) and corresponding weights of a terminal (i.e., UE) that can be used for localization.

[0161] 3. Machine learning or neural artificial networks use prior channel information as the training set, and the local RSRP can be the test set / target set.

[0162] Note that other probabilistic or kernel-based methods exist for determining location. Furthermore, the content included in the prior channel information can be modified based on the algorithm / method used to estimate the location.

[0163] In this embodiment, the prior channel information includes the channel delay spread (PDF), and all links in the region are NLOS links. In this embodiment, the distribution of the channel delay spread (PDF) is normally distributed, and the corresponding average value μ... nlos and the corresponding standard deviation δ nlos It is also included as part of the prior channel information. Wireless terminals within the area (e.g., Figure 3 The UE2 shown in the figure can be obtained from the BS (e.g., Figure 3 The BS1, BS2, BS3, and BS4 shown in the diagram receive signals and determine their channel information accordingly. In this embodiment, the wireless terminal determines the average additional delay based on the channel / link between the i-th terminal and the j-th BS, which can be expressed as τ. i,j Because the first arrival path typically has the highest power in a LOS link, and the average additional delay decreases as the power of the first arrival path increases, the average additional delay of a LOS link is more likely to be lower than that of an NLOS link. That is, when the average additional delay τ of the link... i,j When the value is small, the probability that this link is a LOS link is higher. Therefore, when the average additional latency τ of the link is small... i,j When the threshold is less than τ, the wireless terminal can determine that the link is a LOS link. For example, when τ i,j ≤(μ nlos -1.5·δ nlos The wireless terminal can determine that the link is a LOS link. Furthermore, the content included in the prior channel information can be modified based on the algorithm / method used to estimate LOS and NLOS links. For example, the prior channel information used to identify a link as an LOS or NLOS link may include at least one of the following: First Path Arrival Power PDF, Kurtosis PDF, Skewness PDF, Angular Spread PDF, and Rician K-factor PDF.

[0164] In this embodiment, the UE may use prior channel information as a fingerprint to predict its channel information and / or its location.

[0165] While various embodiments of this disclosure have been described above, it should be understood that they are presented merely as examples and not as limitations. Similarly, various figures may depict exemplary architectures or configurations, provided to enable those skilled in the art to understand the exemplary features and functionality of this disclosure. However, such a person will understand that this disclosure is not limited to the exemplary architectures or configurations shown, but can be implemented using various alternative architectures and configurations. Additionally, as will be understood by those skilled in the art, one or more features of one embodiment may be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of this disclosure should not be limited by any of the exemplary embodiments described above.

[0166] It should also be understood that any reference to elements in this document using designations such as "first," "second," etc., generally does not restrict the number or order of these elements. Rather, these designations may be used herein as a convenient means of distinguishing two or more elements or instances of elements. Therefore, a reference to the first element and the second element does not imply that only two elements can be used, or that the first element must somehow precede the second element.

[0167] Additionally, those skilled in the art will understand that information and signals can be represented using any of a variety of different techniques and processes. For example, data, instructions, commands, information, signals, bits, and symbols (e.g., they may be referenced in the description above) can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0168] Those skilled in the art will further understand that any of the various illustrative logic blocks, units, processors, devices, circuits, methods, and functions described in conjunction with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination of both), firmware, various forms of program or design code incorporating instructions (which may be referred to herein as "software" or "software unit"), or any combination of these techniques.

[0169] To clearly illustrate this interchangeability of hardware, firmware, and software, various illustrative components, blocks, units, circuits, and steps have been described above in general terms of their functionality. Whether this functionality is implemented as hardware, firmware, software, or a combination of these technologies depends on the specific application and design constraints imposed on the system as a whole. Skilled artisans can implement the described functionality in various ways for each specific application, but such implementation decisions do not depart from the scope of this disclosure. According to various embodiments, processors, devices, components, circuits, structures, machines, units, etc., can be configured to perform one or more of the functions described herein. The terms “configured to” or “configured for” as used herein with respect to a particular operation or function refer to processors, devices, components, circuits, structures, machines, units, etc., that are physically constructed, programmed, and / or arranged to perform the specified operation or function.

[0170] Furthermore, those skilled in the art will understand that the various illustrative logic blocks, cells, devices, components, and circuits described herein can be implemented within or executed by an integrated circuit (IC), which may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, or any combination thereof. Logic blocks, cells, and circuits may also include antennas and / or transceivers for communication with various components within a network or device. A general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a combination of multiple microprocessors, a combination of one or more microprocessors with a digital signal processor core, or any other suitable configuration to perform the functions described herein. If implemented in software, the functions may be stored as one or more instructions or code on a computer-readable medium. Therefore, the steps of the methods or algorithms disclosed herein can be implemented as software stored on a computer-readable medium.

[0171] Computer-readable media include both computer storage media and communication media, with the latter including any medium that can be enabled to transfer computer programs or code from one place to another. Storage media can be any available medium that is accessible to a computer. By way of example, and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage devices, magnetic disk storage devices or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that is accessible to a computer.

[0172] In this document, as used herein, the term "unit" refers to software, firmware, hardware, and any combination of such elements for performing the associated functions described herein. Additionally, for the purposes of discussion, various units are described as discrete modules; however, as will be apparent to those skilled in the art, according to embodiments of this disclosure, two or more units may be combined to form a single unit performing associated functions.

[0173] Additionally, in embodiments of this disclosure, memory or other storage devices and communication components may be employed. It should be understood that, for clarity, embodiments of this disclosure have been described above with reference to different functional units and processors. However, it will be apparent that any suitable functional distribution among different functional units, processing logic elements, or domains may be used without departing from this disclosure. For example, functions shown to be performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Therefore, references to specific functional units are merely references to suitable means for providing the described functionality and do not indicate a strict logical or physical structure or organization.

[0174] Various modifications to the embodiments described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the embodiments shown herein, but is accorded the widest scope consistent with the novel features and principles disclosed herein, as set forth in the foregoing claims.

Claims

1. A wireless communication method for use in a user terminal, the wireless communication method comprising: Receive prior channel information from a network entity or a first wireless network node, the prior channel information being associated with at least one channel between each of at least one wireless terminal and each of at least one second wireless network node, and At least one characteristic of the user terminal is determined based on the prior channel information. The prior channel information includes the angle spread probability distribution function (PDF), the Rician K-factor (PDF), and the confidence level of the prior channel information. The at least one characteristic includes information indicating whether at least one channel of the user terminal is a line-of-sight (LOS) channel or a non-line-of-sight (NLOS) channel. The method further includes: The user terminal sends a signal to the network entity or the first wireless network node indicating the user terminal's ability to receive the prior channel information. The user terminal sends a request for the prior channel information to the network entity or the first wireless network node. The user terminal sends a signal to the network entity or the first wireless network node indicating the content included in the prior channel information.

2. The wireless communication method according to claim 1, further comprising: The reference signal is received from the at least one second wireless network node on the at least one channel. Based on the reference signal, determine the local channel information, and The at least one characteristic is determined based on the prior channel information and the local channel information.

3. The wireless communication method according to claim 1 or 2, wherein the prior channel information further includes at least one of the following: Channel impulse response (CIR) Reference signal received power RSRP Compared to RSRP, Path loss, Relative path loss, Path loss model First arrival path time, Time difference of arrival First arrival path power First arrival path power (PDF) Average additional latency, Delayed spread, The delay from the strongest power path to the first arrival path. Kuroshi Kushden PDF, Skewness, Skewness PDF Angle information, wherein the angle information includes at least one of the following: Reaching the zenith angle, reaching the azimuth angle, departing from the zenith angle, or departing from the azimuth angle. Angle extension information, wherein the angle extension information includes at least one of the following: Extension to zenith angle, extension to azimuth angle, extension away from zenith angle, or extension away from azimuth angle. Rician K factor, The coordinates of each of the at least one second wireless network node, or the coordinates of each of the at least one wireless terminal.

4. The wireless communication method according to any one of claims 1 to 3, wherein at least one characteristic of the user terminal further includes at least one of the following: at least one channel characteristic of at least one channel of the user terminal, the location of the user terminal, or the speed of the user terminal.

5. The wireless communication method according to any one of claims 1 to 4, further comprising: Send the at least one feature to the network entity or the first wireless network node.

6. The wireless communication method according to claim 5, further comprising: Receive from the first wireless network node control information for configuring reference signals and / or data channel transmission between the wireless terminal and the first wireless network node based on the at least one characteristic, and The transmission with the first wireless network node is performed based on the control information.

7. The wireless communication method according to any one of claims 1 to 6, wherein the at least one second wireless network node includes the first wireless network node.

8. The wireless communication method according to any one of claims 1 to 7, wherein the network entity resides in at least one of the core network, the first wireless network node, or the at least one second wireless network node.

9. A wireless communication method for use in a first wireless network node, the wireless communication method comprising: Prior channel information is transmitted, which is associated with at least one channel between each of at least one wireless terminal and each of at least one second wireless network node, and the prior channel information is used by the user terminal to determine at least one characteristic of the user terminal. The prior channel information includes the angle spread probability distribution function (PDF), the Rician K-factor (PDF), and the confidence level of the prior channel information. The at least one characteristic includes information indicating whether at least one channel of the user terminal is a line-of-sight (LOS) channel or a non-line-of-sight (NLOS) channel. The method further includes: Receive from the user terminal a signal indicative of the user terminal's ability to receive the prior channel information. Receive a request for the prior channel information from the user terminal. The user terminal receives a signal indicating the content included in the prior channel information.

10. The wireless communication method according to claim 9, wherein the prior channel information is broadcast to at least one user terminal or sent to a user terminal.

11. The wireless communication method according to claim 9 or 10, wherein the prior channel information further comprises at least one of the following: Channel impulse response (CIR) Reference signal received power RSRP Compared to RSRP, Path loss, Relative path loss, Path loss model First arrival path time, Time difference of arrival First arrival path power First arrival path power (PDF) Average additional latency, Delay spread, The delay from the strongest power path to the first arrival path. Kuroshi Kushden PDF, Skewness, Skewness PDF Angle information, wherein the angle information includes at least one of the following: Reaching the zenith angle, reaching the azimuth angle, departing from the zenith angle, or departing from the azimuth angle. Angle extension information, wherein the angle extension information includes at least one of the following: Extension to zenith angle, extension to azimuth angle, extension away from zenith angle, or extension away from azimuth angle. Rician K factor, The coordinates of each of the at least one second wireless network node, or the coordinates of each of the at least one wireless terminal.

12. The wireless communication method according to any one of claims 9 to 11, wherein the prior channel information is transmitted periodically, aperiodically, or semi-continuously.

13. The wireless communication method according to any one of claims 9 to 12, further comprising: Receive at least one characteristic of the user terminal determined based on the prior channel information from the user terminal.

14. The wireless communication method according to claim 13, wherein at least one characteristic of the user terminal further includes at least one of the following: channel characteristics of at least one channel of the user terminal, the location of the user terminal, or the speed of the user terminal.

15. The wireless communication method according to claim 13 or 14, further comprising: Sending control information to the user terminal based on at least one characteristic of the wireless terminal to configure the transmission of reference signals and / or data channels, and The transmission with the user terminal is performed based on the control information.

16. The wireless communication method according to any one of claims 9 to 15, wherein the at least one second wireless network node includes the first wireless network node.

17. The wireless communication method according to any one of claims 9 to 16, further comprising: Receive the prior channel information from the network entity. The network entity resides in at least one of the core network, the first wireless network node, or the at least one second wireless network node.

18. A wireless communication method for use in a network entity, the wireless communication method comprising: Receive channel information associated with at least one channel between at least one wireless terminal and at least one wireless network node, as prior channel information, from at least one wireless terminal. Sending the prior channel information to the user terminal enables the user terminal to determine at least one characteristic of the user terminal. The prior channel information includes the angle spread probability distribution function (PDF), the Rician K-factor (PDF), and the confidence level of the prior channel information. The at least one characteristic includes information indicating whether at least one channel of the user terminal is a line-of-sight (LOS) channel or a non-line-of-sight (NLOS) channel. The method further includes: Receive from the user terminal a signal indicative of the user terminal's ability to receive the prior channel information. Receive a request for the prior channel information from the user terminal. The user terminal receives a signal indicating the content included in the prior channel information.

19. The wireless communication method according to claim 18, wherein the prior channel information further comprises at least one of the following: Channel impulse response (CIR) Reference signal received power RSRP Compared to RSRP, Path loss, Relative path loss, Path loss model First arrival path time, Time difference of arrival First arrival path power First arrival path power (PDF) Average additional latency, Delayed spread, The delay from the strongest power path to the first arrival path. Kuroshi Kushden PDF, Skewness, Skewness PDF Angle information, wherein the angle information includes at least one of the following: Reaching the zenith angle, reaching the azimuth angle, departing from the zenith angle, or departing from the azimuth angle. Angle extension information, wherein the angle extension information includes at least one of the following: Extension to zenith angle, extension to azimuth angle, extension away from zenith angle, or extension away from azimuth angle. Rician K factor, The coordinates of each of the at least one wireless network node, or The coordinates of each of the at least one wireless terminal.

20. The wireless communication method according to claim 18 or 19, wherein the network entity resides in at least one of the core network or the at least one wireless network node.

21. A user terminal, comprising: A communication unit configured to receive prior channel information from a network entity or a first wireless network node, the prior channel information being associated with at least one channel between each of at least one wireless terminal and each of at least one second wireless network node. A processor configured to determine at least one characteristic of the user terminal based on the prior channel information. The prior channel information includes the angle spread probability distribution function (PDF), the Rician K-factor (PDF), and the confidence level of the prior channel information. The at least one characteristic includes information indicating whether at least one channel of the user terminal is a line-of-sight (LOS) channel or a non-line-of-sight (NLOS) channel. The communication unit is further configured to: Send a signal to the network entity or the first wireless network node instructing the user terminal on its ability to receive the prior channel information. Send a request for the prior channel information to the network entity or the first wireless network node. Send a signal to the network entity or the first wireless network node indicating the content included in the prior channel information.

22. The user terminal according to claim 21, wherein the processor is further configured to perform the wireless communication method according to any one of claims 2 to 8.

23. A first wireless network node, comprising: A communication unit configured to transmit prior channel information, the prior channel information being associated with at least one channel between each of at least one wireless terminal and each of at least one second wireless network node, and the prior channel information being used by a user terminal to determine at least one characteristic of the user terminal. The prior channel information includes the angle spread probability distribution function (PDF), the Rician K-factor (PDF), and the confidence level of the prior channel information. The at least one characteristic includes information indicating whether at least one channel of the user terminal is a line-of-sight (LOS) channel or a non-line-of-sight (NLOS) channel. The communication unit is further configured to: Receive from the user terminal a signal indicative of the user terminal's ability to receive the prior channel information. Receive a request for the prior channel information from the user terminal. The user terminal receives a signal indicating the content included in the prior channel information.

24. The first wireless network node according to claim 23, further comprising: A processor configured to perform the wireless communication method according to any one of claims 10 to 17.

25. A network entity, comprising: Communication unit, the communication unit being configured to: Receive channel information associated with at least one channel between at least one wireless terminal and at least one wireless network node, as prior channel information, from at least one wireless terminal. Sending the prior channel information to the user terminal enables the user terminal to determine at least one characteristic of the user terminal. The prior channel information includes the angle spread probability distribution function (PDF), the Rician K-factor (PDF), and the confidence level of the prior channel information. The at least one characteristic includes information indicating whether at least one channel of the user terminal is a line-of-sight (LOS) channel or a non-line-of-sight (NLOS) channel. The communication unit is further configured to: Receive from the user terminal a signal indicative of the user terminal's ability to receive the prior channel information. Receive a request for the prior channel information from the user terminal. The user terminal receives a signal indicating the content included in the prior channel information.

26. The network entity according to claim 25, further comprising: A processor configured to perform the wireless communication method according to any one of claims 19 to 20.

27. A computer program product comprising computer-readable program medium code stored thereon, the code causing the processor, when executed by a processor, to perform the wireless communication method of any one of claims 1 to 20.

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