Csi reporting enhancement for high speed train scenario

Abstract

A method (300) for configuring channel state information (CSI) reporting at a user equipment (UE) (402, 404) in a high speed train (HST) scenario includes decoding, in response to being within range of a first transmission and reception point (TRP) (102, 104, 202, 204) of a plurality of TRPs associated with a HST, a CSI reporting configuration communication received from a network, the CSI reporting configuration indicating that a CSI report is to be performed in a HST scenario and is being configured for a HST scenario (302); performing measurements based on the decoded CSI reporting configuration received from the network (304); encoding a CSI report communication associated with the HST scenario based on the measurements for transmission to the network (306).

Description

Technical Field

[0001] This application relates in general to wireless communication systems, including CSI reporting enhancement. Background Technology

[0002] Wireless mobile communication technologies use various standards and protocols to transmit data between base stations and wireless communication devices. Wireless communication system standards and protocols can include, for example, 3GPP Long Term Evolution (LTE) (such as 4G), 3GPP New Radio (NR) (such as 5G), and the IEEE 802.11 standard for Wireless Local Area Networks (WLANs) (often referred to within industry organizations as...). ).

[0003] As envisioned by 3GPP, different wireless communication system standards and protocols can use various radio access networks (RANs) to enable RAN base stations (which are sometimes also called RAN nodes, network nodes, or simply nodes) to communicate with wireless communication equipment called user equipment (UEs). 3GPP RANs may include, for example, Global System for Mobile Communications (GSM), Enhanced Data Rate GSM Evolution (EDGE) RAN (GERAN), Universal Terrestrial Radio Access Network (UTRAN), Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and / or Next Generation Radio Access Network (NG-RAN).

[0004] Each RAN can use one or more Radio Access Technologies (RATs) for communication between the base station and the UE. For example, GERAN implements the GSM and / or EDGE RAT, UTRAN implements the Universal Mobile Telecommunications System (UMTS) RAT or other 3GPP RATs, E-UTRAN implements the LTE RAT (sometimes simply referred to as LTE), and NG-RAN implements the NR RAT (sometimes also referred to herein as the 5G RAT, 5G NR RAT, or simply NR). In some deployments, E-UTRAN may also implement the NR RAT. In some deployments, NG-RAN may also implement the LTE RAT.

[0005] The base stations used by a RAN can correspond to that RAN. An example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly referred to as Evolved Node B, Enhanced Node B, eNodeB, or eNB). An example of an NG-RAN base station is a Next Generation Node B (sometimes also called gNodeB or gNB).

[0006] The RAN provides communication services to external entities through its connection with the core network (CN). For example, E-UTRAN can utilize the evolved packet core network (EPC), while NG-RAN can utilize the 5G core network (5GC). Attached Figure Description

[0007] To facilitate identification of any particular element or action being discussed, one or more of the most significant digits in the reference numerals refer to the drawing number in which the element was first introduced.

[0008] Figure 1 Examples of CRI reports based on some implementation schemes are shown.

[0009] Figure 2 Examples of CRI reports based on some implementation schemes are shown.

[0010] Figure 3 A flowchart is shown of a method for configuring channel CSI reports at the UE according to some implementation schemes.

[0011] Figure 4 An exemplary architecture of a wireless communication system according to the embodiments disclosed herein is shown.

[0012] Figure 5 A system for performing signaling between a wireless device and a network device according to an embodiment disclosed herein is shown. Detailed Implementation

[0013] Various embodiments are described with respect to the UE. However, references to the UE are provided for illustrative purposes only. Exemplary embodiments may be used with any electronic component capable of establishing a connection to a network and configured with hardware, software, and / or firmware for exchanging information and data with the network. Therefore, the UE described herein is used to represent any suitable electronic component.

[0014] High-speed train (HST) deployment scenarios present unique wireless environments. Specifically, when a UE (e.g., a mobile device on a train or belonging to a user on a train) travels between two transmit / receive points (TRPs) in an HST scenario, the UE may observe a very high positive Doppler shift from the first TRP and a very high negative Doppler shift from the second TRP. Therefore, the composite channel can change rapidly (e.g., approximately or greater than 2 kHz). Such scenarios can reduce channel capabilities or present challenges for the UE when attempting to perform accurate channel estimation and date demodulation.

[0015] Currently, 3GPP Release 17 (Rel-17) supports two HST enhancement modes based on Single Frequency Network (SFN) transmission. The first mode includes HST-SFN without network (NW) pre-compensation. In this mode, the Physical Downlink Shared Channel (PDSCH) / Physical Downlink Control Channel (PDCCH) (i.e., Control Resource Set (CORESET)) is configured as quasi-co-located (QCL) to two Tracking Resource Signals (TRS). Furthermore, this mode allows the UE to estimate two separate Doppler shifts (i.e., each Doppler shift originating from each TRP) to assist in UE channel estimation. The second mode includes HST-SFN with NW pre-compensation. In this mode, one PDSCH is configured to QCL to one TRS with a "Doppler shift" attribute and to another TRS without the "Doppler shift" attribute.

[0016] Current / previous Rel-17 HST enhancements focus on the design of enhanced transmission schemes. However, for such systems to operate as efficiently as possible, channel state information (CSI) enhancements are also important for ensuring effective link adaptation. Specifically, current / previous CSI enhancements do not take into account HST-SFN transmissions, including: 1. For HST-SFNs without NW pre-compensation, different channel measurement resources (CMRs) can come from different TRPs with different Doppler shifts; and 2. For HST-SFNs with NW pre-compensation, different CMRs can come from different TRPs with different QCL attributes.

[0017] Therefore, the solution presented in this paper addresses CSI enhancements for HST scenarios, including: 1. Indication for CSI reports used in HST; 2. Enhanced CSI measurement resource configuration; 3. Increased CSI reporting volume; 4. CSI processing timeline considerations; and 5. Enhanced CPU usage / active RS counting rules.

[0018] The first solution provided herein relates to instructing CSI reports to be used for HST and includes a number of different options and sub-options. In the first option regarding instructing CSI reports to be used for HST, such instruction can be explicitly configured by Radio Resource Control (RRC) in the CSI-ReportConfig (i.e., the CSI report configuration). In some embodiments, the CSI-ReportConfig may include a new Information Element (IE) to indicate whether the CSI report is used for: a. an HST-SFN mode without NW pre-compensation (HST Scheme 1); or b. an HST-SFN mode with NW pre-compensation. In other embodiments, a new reportQuantity may be configured to support a specific report quantity for HST enhancement (i.e., a new reportQuantity for an HST-SFN mode without NW pre-compensation (HST Scheme 1) or a new reportQuantity for an HST-SFN mode with NW pre-compensation).

[0019] When configuring CSI reporting for HST, certain restrictions may be further imposed, including but not limited to those associated with: 1. QCL configuration of the CSI reference signal (RS); and / or 2. Reporting volume configuration.

[0020] In the second option regarding the indication of CSI reports for HST, such indication can be implicitly indicated by the QCL configuration of the CSI-RS for Channel Measurement Resources (CMR). Two sets of CSI-RS for CMR can be configured in CSI-ReportConfig, whether for the HST-SFN mode without NW pre-compensation (HST Scheme 1) or the HST-SFN mode with NW pre-compensation.

[0021] For example, for an HST-SFN mode without NW precompensation (HST scheme 1), the first set of CSI-RSs used for CMR can be configured to be quasi-co-addressed to the first set of TRSs having QCL type A (i.e., {Doppler frequency shift, Doppler spread, average delay, delay spread}) and QCL-Type D (if applicable). Similarly, the second set of CSI-RSs used for CMR can be configured to be quasi-co-addressed to the second set of TRSs having QCL type A (i.e., {Doppler frequency shift, Doppler spread, average delay, delay spread}) and QCL-Type D (if applicable).

[0022] For HST-SFN mode with NW precompensation, the first set of CSI-RS for CMR can be configured to be quasi-co-addressed to the first set of TRS having QCL type A (i.e., {Doppler shift, Doppler spread, average delay, delay spread}) and QCL-Type D (if applicable). Conversely, the second set of CSI-RS for CMR can be configured to be quasi-co-addressed to the second set of TRS having a specific QCL type (i.e., {average delay, delay spread}) and QCL-Type D (if applicable).

[0023] The second solution presented in this document relates to enhanced CSI measurement resource configuration for HST and includes several different options and sub-options. The first option for enhanced CSI measurement configuration relates to enhanced CMR configuration for HST. Specifically, the first option includes two sets of CSI-RS, which can be configured as described in the following sub-options: 1. A single non-zero power CSI-RS-ResourceSet (NZP-CSI-RS-ResourceSet) can be configured in a specific CSI-ReportConfig. The CSI-RS resources in a single NZP-CSI-RS-ResourceSet can be configured to be divided into two groups, including: a. a first group corresponding to a first TRP; and b. a second group corresponding to a second TRP. NW can further configure one or more pairs of CSI-RS resources for HST CSI reporting. In each such pair, the first CSI-RS may come from a first set of CSI-RS resources (i.e., corresponding to the first TRP), and the second CSI-RS may come from a second set of CSI-RS resources (i.e., corresponding to the second TRP); or 2. Two NZP-CSI-RS-ResourceSets may be configured in a specific CSI-ReportConfig. In such implementations, the first NZP-CSI-RS-ResourceSet may correspond to the first TRP, and the second NZP-CSI-RS-ResourceSet may correspond to the second TRP. The NW may further configure one or more pairs of CSI-RS resources for HST CSI reporting. In each such pair, the first CSI-RS may come from the first NZP-CSI-RS-ResourceSet (i.e., corresponding to the first TRP), and the second CSI-RS may come from the second NZP-CSI-RS-ResourceSet (i.e., corresponding to the second TRP).

[0024] A second option for enhancing CSI measurement configuration also involves enhancing CMR configuration for HST, where the two sets of CSI-RS can each be configured to correspond to different TRPs. For the HST-SFN mode without NW pre-compensation (HST scheme 1), the first set of CSI-RS for CMR can be configured to be quasi-co-addressed to the first set of TRS having QCL type A (i.e., {Doppler frequency shift, Doppler spread, average delay, delay spread}) and QCL-Type D (if applicable). Similarly, the second set of CSI-RS for CMR can be configured to be quasi-co-addressed to the second set of TRS having QCL type A (i.e., {Doppler frequency shift, Doppler spread, average delay, delay spread}) and QCL-Type D (if applicable). For HST-SFN mode with NW precompensation, the first set of CSI-RSs used for CMR can be configured to be quasi-co-addressed to the first set of TRSs with QCL type A (i.e., {Doppler shift, Doppler spread, average delay, delay spread}) and QCL-Type D (if applicable). Conversely, the second set of CSI-RSs used for CMR can be configured to be quasi-co-addressed to the second set of TRSs with a specific QCL type (i.e., {average delay, delay spread}) and QCL-Type D (if applicable). As an example, the following may apply:

[0025]

[0026] It is worth noting that, in the background, NR currently includes support for the following two types of interference measurement resources (IMR): 1. Non-zero power IMR using NZP-CSI-RS resources (NZP-IMR); and 2. Zero power IMR using CSI-IM resources (ZP-IMR).

[0027] Therefore, a third option for CSI measurement configuration enhancement involves IMR configuration enhancement for HST, where the following three options can be applied: 1. NZP-IMR / ZP-IMR may not be configured; 2. NZP-IMR / ZP-IMR may be configured and mapped one-to-one to each CSI Resource Indicator (CRI) assumption, including a single CSI-RS from any TRP or a pair of CSI-RS from two TRPs; or 3. NZP-IMR / ZP-IMR may be configured and only a single NZP-IMR / ZP-IMR may be configured across two TRPs or per TRP. When multiple CSI-RS are configured as the CMR of a TRP, a given UE implementation can be used to determine which QCL assumption is used to receive the NZP-IMR / ZP-IMR. Additionally, in some implementations, independent solutions may be used for NZP-IMR and ZP-IMR.

[0028] The third solution presented in this paper relates to CSI reporting volume enhancement for HST and includes several different options and sub-options. The first option for CSI reporting volume enhancement relates to CRI reporting when CSI-RS resource pairs are not configured and includes the following sub-options: a. Two independent CRIs can be reported, where the first CRI is indexed to a first set of CSI-RS resources and the second CRI is indexed to a second set of CSI-RS resources; or b. A single CRI can be reported, which may include: i. the CRI being applied independently to both sets of CSI-RS resources; or ii. joint encoding of the CRI is allowed.

[0029] Figure 1 The diagram illustrates two options for a single CRI, discussed as sub-option b of the first option regarding the third solution. (See figure.) Figure 1 This includes TRP 102 with CSI-RS resource set 106 (i.e., CSI-RS1_1 and CSI-RS 1_2) and TRP 104 with CSI-RS resource set 108 (i.e., CSI-RS2_1 and CSI-RS 2_2). Additionally, Figure 1 This includes a single CRI report 110 and a single CRI report 112. The single CRI report 110 includes CRIs applied independently to two sets of CSI-RS resources (i.e., CSI-RS resource set 106 and CSI-RS resource set 108) (i.e., sub-option bi of the first option of the third solution), and the single CRI report 112 includes a single CRI applied to two sets of CSI-RS resources using joint coding (i.e., sub-option bii of the first option of the third solution).

[0030] When two sets of CSI-RS resources are configured for each TRP, a second option for enhancing CSI reporting volume involves CRI reporting. In such implementations, each CRI can be indexed to a corresponding set of CSI-RS resources configured for each TRP. The base station (e.g., gNB) can further restrict the combinations of CRIs that the UE can report, which can reduce both the processing complexity of the UE and the CRI overhead.

[0031] Figure 2 This illustrates an example of a CRI report when two sets of CSI-RS resources are configured separately for each TRP. As shown in the figure... Figure 2 This includes TRP 202 with CSI-RS resource set 206 (i.e., CSI-RS 1_1, CSI-RS 1_2, CSI-RS 1_3, and CSI-RS 1_4) and TRP 204 with CSI-RS resource set 208 (i.e., CSI-RS 2_1, CSI-RS 2_2, CSI-RS 2_3, and CSI-RS 2_4). Additionally, Figure 2This includes CRI report 210, which includes configuring CSI-RS resources for each TRP and indexing each CRI to a corresponding set of CSI-RS resources configured for each TRP.

[0032] The third option for enhancing CSI reporting volume involves Channel Quality Indicator (CQI) reporting, which allows reporting a single CQI. The fourth option for enhancing CSI reporting volume involves Rank Indicator (RI) reporting, which allows reporting a single RI. The fifth option for enhancing CSI reporting volume involves Precoding Matrix Indicator (PMI) reporting, which allows reporting two PMIs (each corresponding to a different TRP). The sixth option for enhancing CSI reporting volume involves Layer Indicator (LI) reporting, which allows two options: 1. reporting one LI (identical for both TRPs); or 2. reporting two LIs, where each LI corresponds to a different TRP.

[0033] The fourth solution presented in this paper relates to CSI processing timeline considerations for HST and includes several different options and sub-options. In the first option, for periodic and semi-persistent CSI reporting, the relaxation timeline can be hard-coded within the specification in the 5.2.2.5 CSI reference resource definition described in 3GPP TS 38.514. Similarly, for non-periodic CSI reporting, the relaxation timeline can be hard-coded into Z and Z' tables within the specification in 5.4 UE CSI calculation time described in 3GPP TS 38.514. In such implementations, new tables can be created, or existing tables with different mappings can be used.

[0034] In the second option related to the CSI processing timeline considerations for HST, the UE can report the applicable time slack as a UE capability via RRC. The same or different timeline slacks can also be reported for continuous / semi-continuous CSI (P / SP-CSI) and aperiodic CSI (AP-CSI).

[0035] The fifth solution presented in this paper relates to enhanced CSI processing unit occupancy / active CSI-RS counting rules for HST, and includes a number of different options and sub-options. When configuring two sets of CSI-RS resources and possibly one or more pairs of CSI-RS resources, the following can be applied: 1. For each TRP hypothesis, count the CSI-PU and active CSI-RS independently; and 2. For each multi-TRP hypothesis, count the CSI-PU and active CSI-RS independently for each CSI-RS in the multi-TRP hypothesis (e.g., when the multi-TRP hypothesis contains two CSI-RS, it is counted as 2 instead of 1).

[0036] Figure 3 A flowchart of method 300 for configuring CSI reports in an HST scenario is shown. In 302, method 300 decodes CSI report configuration communication received from the network within the scope of a first TRP among a plurality of transmit and receive points (TRPs) associated with the high-speed train (HST). The CSI report configuration can indicate that a CSI report will be executed in a high-speed train (HST) scenario and can be configured for use in the HST scenario.

[0037] In step 304, method 300 performs measurements based on the decoded CSI report configuration received from the network. For example, such measurements may relate to channel measurements, interferometric measurements, etc. In step 306, method 300 encodes measurement-based CSI report communications associated with the HST scenario for transmission to the network. For example, the UE may perform measurements corresponding to the received CSI report configuration information and send such measurements to the corresponding network.

[0038] Method 300 may further include a CSI reporting configuration configured via Radio Resource Control (RRC) and explicitly indicating the HST scenario. Method 300 may also include a CSI reporting configuration with a new Information Element (IE) indicating whether the CSI reporting configuration is associated with an HST-SFN mode without network pre-compensation or with an HST-SFN mode with network pre-compensation. Method 300 may also include a CSI reporting configuration with a new reportQuantity configured to support the HST scenario.

[0039] Method 300 may further include a CSI reporting configuration for the HST scenario implicitly indicating the quasi-co-location (QCL) configuration of CSI-reference signals (CSI-RS) for channel measurement resources (CMR). Method 300 may also include CSI-RS for CMR comprising a first set of CSI-RS and a second set of CSI-RS. Method 300 may further include: when the first group of CSI-RS and the second group of CSI-RS are configured for an HST single-frequency network (HST-SFN) mode without network pre-compensation, the first group of CSI-RS is configured to be quasi-co-located to a first group of tracking resource signals (TRS) having quasi-co-located type A (QCL-type A) and the second group of CSI-RS is configured to be quasi-co-located to a second group of TRS having QCL-type A; and when the first group of CSI-RS and the second group of CSI-RS are configured for an HST-SFN mode with network pre-compensation, the first group of CSI-RS is configured to be quasi-co-located to a first group of TRS having QCL-type A and the second group of CSI-RS is configured to be quasi-co-located to a second group of TRS having a specific QCL type (including at least average delay and delay spread).

[0040] Method 300 may further include a CSI reporting configuration having a single non-zero power CSI-reference signal (NZP-CSI-RS) resource set associated with a channel measurement resource (CMR). A first portion of the single NZP-CSI-RS resource set may correspond to a first TRP, and a second portion of the single NZP-CSI-RS resource set may correspond to a second TRP among a plurality of TRPs.

[0041] Method 300 may further include a CSI reporting configuration having a first non-zero power CSI-reference signal (NZP-CSI-RS) resource set associated with a channel measurement resource (CMR) and a second NZP-CSI-RS resource set associated with the CMR. The first NZP-CSI-RS resource set may correspond to a first TRP, and the second NZP-CSI-RS resource set may correspond to a second TRP among a plurality of TRPs.

[0042] Method 300 may further include two sets of CSI-reference signals (CSI-RS) associated with channel measurement resources (CMR). The first set of CSI-RS may correspond to a first TRP, and the second set of CSI-RS may correspond to a second TRP. Additionally, when the first and second sets are configured for an HST single-frequency network (HST-SFN) mode without network pre-compensation, the first set is configured to be quasi-co-located to a first set of tracking resource signals (TRS) with quasi-co-location type A (QCL-type A), and the second set of CSI-RS is configured to be quasi-co-located to a second set of TRS with QCL-type A. Furthermore, when the first and second sets are configured for an HST-SFN mode with network pre-compensation, the first set is configured to be quasi-co-located to a first set of TRS with QCL-type A, and the second set is configured to be quasi-co-located to a second set of TRS with a specific QCL type (including at least average delay and delay spread).

[0043] Method 300 may further include a CSI reporting configuration with non-zero power interference measurement resources (NZP-IMR) or zero power interference measurement resources (ZP-IMR). Method 300 may also include a CSI reporting configuration with CSI resource indicators (CRIs) configured, which include two independent CRIs to be reported. The first CRI of the two independent CRIs may be indexed to a first set of CSI-reference signal (CSI-RS) resources, and the second CRI of the two independent CRIs may be indexed to a second set of CSI-RS resources.

[0044] Method 300 may also include a CSI reporting configuration with a CSI Resource Indicator (CRI) configuration, which includes a single CRI being reported. A single CRI may be applied independently to two sets of CSI-Reference Signal (CSI-RS) resources, or a single CRI may be applied to two sets of CSI-RS resources using joint coding.

[0045] Method 300 may further include a CSI report configuration with CSI Resource Indicator (CRI) configuration. When a first set of CSI-Reference Signal (CSI-RS) resources is configured for a first TRP and a second set of CSI-RS resources is configured separately for a second TRP among a plurality of TRPs, the first CRI associated with the first TRP and the first set of CSI-RS resources can be indexed into the CSI-RS resources configured for the first TRP, and the second CRI associated with the second TRP and the second set of CSI-RS resources can be indexed into the CSI-RS resources configured for the second TRP.

[0046] Method 300 may further include CSI report communication, which includes at least one of the following: a single-channel quality indicator (CQI), a single-rank indicator (RI), a first precoding matrix indicator (PMI) corresponding to a first TRP and a second PMI corresponding to a second TRP among a plurality of TRPs, a layer indicator (LI) corresponding to a first TRP and a second TRP, or a first LI corresponding to a first TRP and a second LI corresponding to a second TRP.

[0047] The method may also include encoding UE capability messages that include time relaxation values ​​associated with CSI processing in HST scenarios.

[0048] The embodiments contemplated herein include an apparatus comprising means for performing one or more elements of method 300. This apparatus may be, for example, a UE's apparatus (such as wireless device 502 as a UE, as described herein).

[0049] The embodiments envisioned herein include one or more non-transitory computer-readable media containing instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of method 300. The non-transitory computer-readable medium may be, for example, the memory of the UE (such as memory 506 of a wireless device 502 serving as the UE, as described herein).

[0050] The embodiments contemplated herein include an apparatus comprising logic, modules, or circuitry for performing one or more elements of method 300. This apparatus may be, for example, an apparatus of a UE (such as wireless device 502 as a UE, as described herein).

[0051] The embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media containing instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of method 300. The apparatus may be, for example, an apparatus of a UE (such as wireless device 502 as a UE, as described herein).

[0052] The implementation scheme envisioned herein includes a signal as described or associated with one or more elements of method 300.

[0053] The embodiments contemplated herein include a computer program or computer program product containing instructions, wherein the program is executed by a processor to cause the processor to perform one or more elements of method 300. The processor may be a processor of the UE (such as processor 504 as a wireless device 502 of the UE, as described herein). These instructions may be located, for example, in the processor and / or in the memory of the UE (e.g., memory 506 as a wireless device 502 of the UE, as described herein).

[0054] Figure 4 An exemplary architecture of a wireless communication system 400 according to an embodiment disclosed herein is shown. The description provided below is for an exemplary wireless communication system 400 operating in conjunction with LTE system standards and / or 5G or NR system standards provided by 3GPP technical specifications.

[0055] like Figure 4 As shown, the wireless communication system 400 includes UE 402 and UE 404 (however, any number of UEs may be used). In this example, UE 402 and UE 404 are shown as smartphones (e.g., handheld touchscreen mobile computing devices capable of connecting to one or more cellular networks), but may also include any mobile or non-mobile computing device configured for wireless communication.

[0056] UE 402 and UE 404 can be configured to communicate with RAN 406. In implementations, RAN 406 can be NG-RAN, E-UTRAN, etc. UE 402 and UE 404 utilize connections (or channels) with RAN 406 (shown as connection 408 and connection 410, respectively), where each connection (or channel) includes a physical communication interface. RAN 406 may include one or more base stations, such as base station 412 and base station 414, that implement connection 408 and connection 410.

[0057] In this example, Connection 408 and Connection 410 are air interfaces that enable this type of communication coupling and can conform to the RAT used by RAN406, such as, for example, LTE and / or NR.

[0058] In some implementations, UE 402 and UE 404 can also directly exchange communication data via sidelink interface 416. UE 404 is shown configured to access an access point (shown as AP 418) via connection 420. For example, connection 420 may include a local wireless connection, such as a connection conforming to any IEEE 802.11 protocol, where AP 418 may include... Router. In this example, AP 418 may connect to another network (e.g., the Internet) without using CN 424.

[0059] In the implementation, UE 402 and UE 404 may be configured to communicate with each other or with base station 412 and / or base station 414 on a multi-carrier communication channel using orthogonal frequency division multiplexing (OFDM) communication signals, based on various communication technologies, such as, but not limited to, orthogonal frequency division multiple access (OFDMA) communication technology (e.g., for downlink communication) or single-carrier frequency division multiple access (SC-FDMA) communication technology (e.g., for uplink and ProSe or sidelink communication), although the scope of the implementation is not limited in this respect. The OFDM signal may include multiple orthogonal subcarriers.

[0060] In some implementations, all or part of base station 412 or base station 414 may be implemented as one or more software entities running on a server computer as part of a virtual network. Furthermore, or in other implementations, base station 412 or base station 414 may be configured to communicate with each other via interface 422. In implementations where the wireless communication system 400 is an LTE system (e.g., when CN 424 is an EPC), interface 422 may be an X2 interface. This X2 interface may be defined between two or more base stations (e.g., two or more eNBs, etc.) connected to the EPC and / or between two eNBs connected to the EPC. In implementations where the wireless communication system 400 is an NR system (e.g., when CN 424 is a 5GC), interface 422 may be an Xn interface. This Xn interface may be defined between two or more base stations (e.g., two or more gNBs, etc.) connected to the 5GC, between base station 412 (e.g., a gNB) connected to the 5GC and an eNB, and / or between two eNBs connected to the 5GC (e.g., CN 424).

[0061] RAN 406 is shown communicatively coupled to CN 424. CN 424 may include one or more network elements 426 configured to provide various data and telecommunications services to customers / subscribers (e.g., users of UE 402 and UE 404) connected to CN 424 via RAN 406. Components of CN 424 may be implemented in a single physical device or in separate physical devices, including components for reading and executing instructions from machine-readable or computer-readable media (e.g., non-transitory machine-readable storage media).

[0062] In this implementation, CN 424 can be an EPC, and RAN 406 can be connected to CN 424 via S1 interface 428. In this implementation, S1 interface 428 can be divided into two parts: an S1 user plane (S1-U) interface, which carries traffic data between base station 412 or 414 and the serving gateway (S-GW); and an S1-MME interface, which is the signaling interface between base station 412 or 414 and the mobility management entity (MME).

[0063] In this implementation, CN 424 can be a 5GC, and RAN 406 can be connected to CN 424 via NG interface 428. In this implementation, NG interface 428 can be divided into two parts: an NG user plane (NG-U) interface, which carries traffic data between base station 412 or 414 and the User Plane Function (UPF); and an S1 control plane (NG-C) interface, which is the signaling interface between base station 412 or 414 and the Access and Mobility Management Function (AMF).

[0064] Generally, application server 430 can be an element that provides Internet Protocol (IP) carried resources (e.g., packet-switched data services) for use with CN 424. Application server 430 can also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc.) for UE 402 and UE 404 via CN 424. Application server 430 can communicate with CN 424 via IP communication interface 432.

[0065] Figure 5 A system 500 for performing signaling 534 between a wireless device 502 and a network device 518 according to an embodiment disclosed herein is shown. System 500 may be part of a wireless communication system as described herein. Wireless device 502 may be, for example, a UE (User Equipment) of the wireless communication system. Network device 518 may be, for example, a base station (e.g., an eNB or gNB) of the wireless communication system.

[0066] Wireless device 502 may include one or more processors 504. Processor 504 may execute instructions to perform various operations of wireless device 502 as described herein. Processor 504 may include one or more baseband processors implemented using, for example, a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a controller, a field-programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof for performing the operations described herein.

[0067] Wireless device 502 may include memory 506. Memory 506 may be a non-transitory computer-readable storage medium that stores instructions 508 (which may include, for example, instructions executed by processor 504). Instructions 508 may also be referred to as program code or a computer program. Memory 506 may also store data used by processor 504 and results calculated by the processor.

[0068] Wireless device 502 may include one or more transceivers 510, which may include radio frequency (RF) transmitter and / or receiver circuitry that uses antenna 512 of wireless device 502 to facilitate the transmission or receipt of signaling (e.g., signaling 534) between wireless device 502 and other devices (e.g., network device 518) in accordance with a corresponding RAT.

[0069] Wireless device 502 may include one or more antennas 512 (e.g., one, two, four, or more). For implementations with multiple antennas 512, wireless device 502 can fully utilize the spatial diversity of these multiple antennas 512 to transmit and / or receive multiple different data streams on the same time-frequency resource. This practice may be referred to, for example, as a multiple-input multiple-output (MIMO) approach (referring to multiple antennas used separately on the transmitting and receiving sides to implement this aspect). MIMO transmissions performed by wireless device 502 can be achieved according to precoding (or digital beamforming) applied to wireless device 502, whereby the wireless device multiplexes data streams among antennas 512 based on known or assumed channel characteristics, such that each data stream is received with appropriate signal strength relative to the other streams at a desired location in the spatial domain (e.g., the location of the receiver associated with that data stream). Some implementations may use a single-user MIMO (SU-MIMO) method (where the entire data stream is directed to a single receiver) and / or a multi-user MIMO (MU-MIMO) method (where individual data streams may be directed to individual (different) receivers at different locations in the airspace).

[0070] In some implementations with multiple antennas, wireless device 502 may implement analog beamforming techniques, whereby the phase of the signal transmitted by antenna 512 is relatively adjusted, making the (joint) transmission of antenna 512 directional (this is sometimes referred to as beam control).

[0071] Wireless device 502 may include one or more interfaces 514. Interfaces 514 can be used to provide input or output to wireless device 502. For example, wireless device 502 as a UE may include interfaces 514, such as a microphone, speaker, touchscreen, buttons, etc., to allow users of the UE to input and / or output to the UE. Other interfaces of such UEs may consist of transmitters, receivers, and other circuitry (e.g., in addition to the transceiver 510 / antenna 512 already described), allowing the UE to communicate with other devices and according to known protocols (e.g., (etc.) to perform the operation.

[0072] Wireless device 502 may include a CSI reporting module 516. The CSI reporting module 516 may be implemented via hardware, software, or a combination thereof. For example, the CSI reporting module 516 may be implemented as a processor, circuitry, and / or instructions 508 stored in memory 506 and executed by processor 504. In some examples, the CSI reporting module 516 may be integrated within processor 504 and / or transceiver 510. For example, the CSI reporting module 516 may be implemented via a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within processor 504 or transceiver 510.

[0073] CSI reporting module 516 can be used in various aspects of this disclosure, for example, Figures 1 to 3 The CSI reporting module 516 is configured to help identify the applicability of HST scenarios and perform appropriate CSI measurements and reporting associated with the HST scenarios.

[0074] Network device 518 may include one or more processors 520. Processor 520 may execute instructions to perform various operations of network device 518 as described herein. Processor 504 may include one or more baseband processors implemented using, for example, a CPU, DSP, ASIC, controller, FPGA device, another hardware device, firmware device, or any combination thereof configured to perform the operations described herein.

[0075] Network device 518 may include memory 522. Memory 522 may be a non-transitory computer-readable storage medium that stores instructions 524 (which may include, for example, instructions executed by processor 520). Instructions 524 may also be referred to as program code or a computer program. Memory 522 may also store data used by processor 520 and results calculated by the processor.

[0076] Network device 518 may include one or more transceivers 526, which may include RF transmitter and / or receiver circuitry that uses the antenna 528 of network device 518 to facilitate the transmission or receipt of signaling (e.g., signaling 534) between network device 518 and other devices (e.g., wireless device 502) in accordance with the corresponding RAT.

[0077] Network device 518 may include one or more antennas 528 (e.g., one, two, four or more). In embodiments with multiple antennas 528, network device 518 may perform MIMO, digital beamforming, analog beamforming, beam control, etc., as described above.

[0078] Network device 518 may include one or more interfaces 530. Interface 530 may be used to provide input to or output from network device 518. For example, network device 518 as a base station may include interface 530 consisting of transmitters, receivers and other circuitry (e.g., in addition to the transceiver 526 / antenna 528 described), enabling the base station to communicate with other equipment in the core network, and / or enabling the base station to communicate with external networks, computers, databases, etc., for the purpose of operating, managing and maintaining the base station or other equipment operablely connected to it.

[0079] Network device 518 may include a CSI reporting module 532. The CSI reporting module 532 may be implemented via hardware, software, or a combination thereof. For example, the CSI reporting module 532 may be implemented as a processor, circuitry, and / or instructions 524 stored in memory 522 and executed by processor 520. In some examples, the CSI reporting module 532 may be integrated within processor 520 and / or transceiver 526. For example, the CSI reporting module 532 may be implemented via a combination of software components (e.g., executed by a DSP or general-purpose processor) and hardware components (e.g., logic gates and circuitry) within processor 520 or transceiver 526.

[0080] CSI reporting module 532 can be used in various aspects of this disclosure, for example, Figures 1 to 3 All aspects. The CSI reporting module 532 is configured to identify the applicability of HST scenarios and configure the UE to perform the correct CSI report associated with the HST scenario.

[0081] For one or more embodiments, at least one of the components shown in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods as described herein. For example, the baseband processor described herein in conjunction with one or more of the foregoing figures may be configured to operate according to one or more examples of the examples described herein. Similarly, the circuitry associated with the UE, base station, network element, etc., described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more examples of the examples shown herein.

[0082] Unless otherwise expressly stated, any of the above embodiments may be combined with any other embodiment (or combination of embodiments). The foregoing description of one or more specific embodiments provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise form disclosed. In view of the teachings above, modifications and variations are possible, or modifications and variations may be derived from practice of various embodiments.

[0083] Implementations and specific embodiments of the systems and methods described herein may include various operations embodied in machine-executable instructions to be executed by a computer system. The computer system may include one or more general-purpose or special-purpose computers (or other electronic devices). The computer system may include hardware components, including specific logical components for performing the operations, or may include a combination of hardware, software, and / or firmware.

[0084] It should be recognized that the systems described herein include descriptions of specific implementations. These implementations may be combined into a single system, partially integrated into other systems, divided into multiple systems, or otherwise partitioned or combined. Furthermore, it is conceivable to use parameters, attributes, aspects, etc., of one implementation in another implementation. For clarity, these parameters, attributes, aspects, etc., are described only in one or more implementations, and it should be recognized that unless specifically stated herein, these parameters, attributes, aspects, etc., may be combined with or substituted for parameters, attributes, aspects, etc., of another implementation.

[0085] As is widely recognized, the use of personally identifiable information should comply with privacy policies and practices that are generally accepted to meet or exceed industry or governmental requirements for protecting user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of authorized use should be clearly explained to users.

[0086] Although the foregoing has been described in considerable detail for clarity, it will be apparent that certain changes and modifications can be made without departing from the principles of the invention. It should be noted that many alternative ways exist to implement both the processes and apparatus described herein. Therefore, embodiments of the invention should be considered illustrative rather than restrictive, and this specification is not limited to the details given herein, but can be modified within the scope of the appended claims and their equivalents.

Claims

1. A method for configuring Channel State Information (CSI) reports at a User Equipment (UE), the method comprising: In response to the first TRP among a plurality of transmit and receive points (TRPs) associated with a high-speed train (HST), a CSI report configuration communication received from the network is decoded, the CSI report configuration indicating that a CSI report will be executed in the HST scenario and is being configured for the HST scenario; Measurements are performed based on the decoded CSI report received from the network. as well as CSI report communications based on the measurements and associated with the HST scenario are encoded for transmission to the network. Two sets of CSI reference signals (CSI-RS) are associated with channel measurement resources (CMR). The first set of CSI-RS corresponds to the first TRP, and the second set of CSI-RS corresponds to the second TRP. When the first group of CSI-RS and the second group of CSI-RS are configured for HST-SFN mode of HST single-frequency network without network pre-compensation, the first group of CSI-RS is configured to be quasi-co-addressed to the first group of tracking resource signals (TRS) with quasi-co-address type A, i.e., QCL type A, and the second group of CSI-RS is configured to be quasi-co-addressed to the second group of TRS with QCL type A. When the first group of CSI-RS and the second group of CSI-RS are configured for HST-SFN mode with network pre-compensation, the first group of CSI-RS is configured to be quasi-co-addressed to the first group of TRS with QCL-type A with Doppler frequency shift characteristics, and the second group of CSI-RS is configured to be quasi-co-addressed to the second group of TRS with special QCL types, including average delay and delay spread, without Doppler frequency shift characteristics.

2. The method of claim 1, wherein the CSI report configuration is configured via Radio Resource Control (RRC) and explicitly indicates the HST scenario.

3. The method of claim 2, wherein the CSI report configuration includes a new information element indicating whether the CSI report configuration is associated with the HST-SFN mode without network precompensation or with the HST-SFN mode with network precompensation.

4. The method of claim 2, wherein the CSI report configuration includes a new reportQuantity configured to support the HST scenario.

5. The method of claim 1, wherein the CSI report configuration implicitly indicates the HST scenario based on the quasi-co-located QCL configuration of the CSI-reference signal CSI-RS for channel measurement resources CMR.

6. The method of claim 1, wherein the CSI report configuration includes a single non-zero power CSI-reference signal NZP-CSI-RS resource set associated with a channel measurement resource (CMR), a first portion of the single NZP-CSI-RS resource set corresponding to the first TRP and a second portion of the single NZP-CSI-RS resource set corresponding to the second TRP among the plurality of TRPs.

7. The method of claim 1, wherein the CSI report configuration includes a first non-zero power CSI-reference signal NZP-CSI-RS resource set associated with a channel measurement resource (CMR) and a second NZP-CSI-RS resource set associated with the CMR, the first NZP-CSI-RS resource set corresponding to the first TRP and the second NZP-CSI-RS resource set corresponding to the second TRP among the plurality of TRPs.

8. The method of claim 1, wherein the CSI report configuration includes a non-zero power interference measurement resource (NZP-IMR) or a zero power-IMR (ZP-IMR).

9. The method of claim 1, wherein the CSI reporting configuration includes a CSI Resource Indicator (CRI) configuration, the CRI configuration including a single CRI being reported, the single CRI being applied independently to two sets of CSI-Reference Signal (CSI-RS) resources, or the single CRI being applied to the two sets of CSI-RS resources using joint coding.

10. The method of claim 1, wherein the CSI report communication comprises at least one of the following: a single-channel quality indicator (CQI), a single-rank indicator (RI), a first precoding matrix indicator (PMI) corresponding to the first TRP and a second PMI corresponding to the second TRP among the plurality of TRPs, a layer indicator (LI) corresponding to the first TRP and the second TRP, or a first LI corresponding to the first TRP and a second LI corresponding to the second TRP.

11. The method of claim 1, further comprising encoding a UE capability message, the UE capability message including a time relaxation value associated with CSI processing in the HST scenario.

12. A user equipment (UE), the UE comprising: processor; as well as A memory that stores instructions that, when executed by the processor, configure the UE to perform the method according to any one of claims 1 to 11.

13. A non-transitory computer-readable storage medium comprising instructions that, when executed by a processor of a user equipment (UE), cause the processor to perform the method according to any one of claims 1 to 11.

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