WO2025007352A1 - Dispositifs et procédés de communication - Google Patents

Dispositifs et procédés de communication Download PDF

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Publication number
WO2025007352A1
WO2025007352A1 PCT/CN2023/106172 CN2023106172W WO2025007352A1 WO 2025007352 A1 WO2025007352 A1 WO 2025007352A1 CN 2023106172 W CN2023106172 W CN 2023106172W WO 2025007352 A1 WO2025007352 A1 WO 2025007352A1
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WIPO (PCT)
Prior art keywords
csi
terminal device
resources
information
measurement report
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/CN2023/106172
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English (en)
Inventor
Yukai GAO
Peng Guan
Gang Wang
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NEC Corp
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NEC Corp
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Publication date
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Priority to PCT/CN2023/106172 priority Critical patent/WO2025007352A1/fr
Publication of WO2025007352A1 publication Critical patent/WO2025007352A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for configurating and transmitting a measurement report (s) .
  • Multi-TRP/M-TRP multi-transmission and reception point
  • UE user equipment
  • CJT coherent joint transmission
  • the backhaul/synchronization among the TRPs are non-ideal.
  • impairments such as inter-TRP phase/delay and frequency offsets are present, especially for inter-site M-TRP, causing large throughput degradation.
  • CJT assistance information may be reported to the network device in advance, the network performance may be improved accordingly.
  • embodiments of the present disclosure provide a solution for configurating and transmitting a measurement report (s) .
  • a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources; and transmit, to the network device, the at least one measurement report indicating at least one of the following: a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, wherein the second plurality of CSI-RS resources is the same as or a part of the first plurality of CSI
  • a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources; and receive , from the terminal device, the at least one measurement report indicating at least one of the following: a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, wherein the second plurality of CSI-RS resources is a same as or a part of the first plurality of
  • a communication method performed by a terminal device.
  • the method comprises: receiving, from a network device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources; and transmitting, to the network device, the at least one measurement report indicating at least one of the following: a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, wherein the second plurality of CSI-RS resources is the same as or a part of the first plurality of CSI-RS
  • a communication method performed by a network device.
  • the method comprises: transmitting, to a terminal device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources; and receiving , from the terminal device, the at least one measurement report indicating at least one of the following: a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, wherein the second plurality of CSI-RS resources is a same as or a part of the first plurality of CSI
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the third, or fourth aspect.
  • FIG. 1A to 1C illustrate example communication environments in which example embodiments of the present disclosure can be implemented
  • FIG. 2 illustrates a signaling flow of uplink codebook in accordance with some embodiments of the present disclosure
  • FIG. 3A illustrates an example of delay information
  • FIG. 3B illustrates an example of phrase information
  • FIG. 4 illustrates a flowchart of a method implemented at a terminal device according to some example embodiments of the present disclosure
  • FIG. 5 illustrates a flowchart of a method implemented at a network device according to some example embodiments of the present disclosure.
  • FIG. 6 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
  • terminal device refers to any device having wireless or wired communication capabilities.
  • the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV)
  • UE user equipment
  • the ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM.
  • SIM Subscriber Identity Module
  • the term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
  • network device refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate.
  • a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
  • NodeB Node B
  • eNodeB or eNB evolved NodeB
  • gNB next generation NodeB
  • TRP transmission reception point
  • RRU remote radio unit
  • RH radio head
  • RRH remote radio head
  • IAB node a low power node such as a fe
  • the terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • AI Artificial intelligence
  • Machine learning capability it generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • the terminal or the network device may work on several frequency ranges, e.g., FR1 (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed/unlicensed/shared spectrum.
  • FR1 e.g., 450 MHz to 6000 MHz
  • FR2 e.g., 24.25GHz to 52.6GHz
  • THz Tera Hertz
  • the terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario.
  • MR-DC Multi-Radio Dual Connectivity
  • the terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
  • the embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
  • the terminal device may be connected with a first network device and a second network device.
  • One of the first network device and the second network device may be a master node and the other one may be a secondary node.
  • the first network device and the second network device may use different radio access technologies (RATs) .
  • the first network device may be a first RAT device and the second network device may be a second RAT device.
  • the first RAT device is eNB and the second RAT device is gNB.
  • Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device.
  • first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device.
  • information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device.
  • Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
  • the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’
  • the term ‘based on’ is to be read as ‘at least in part based on. ’
  • the term ‘one embodiment’ and ‘an embodiment’ a re to be read as ‘at least one embodiment. ’
  • the term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’
  • the terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
  • values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
  • resource, ” “transmission resource, ” “uplink (UL) resource, ” or “downlink (DL) resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like.
  • a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
  • the term “TRP” or panel may refer to an antenna port or a plurality of antenna ports or an antenna array (with one or more antenna elements) available to the network device located at a specific geographical location.
  • a network device may be coupled with multiple TRPs or multiple panels in different geographical locations to achieve better coverage.
  • multiple TRPs or multiple panels may be incorporated into a network device, or in other words, the network device may comprise the multiple TRPs or multiple panels.
  • the term “TRP” or panel may be also referred to as a cell, such as a macro-cell, a small cell, a pico-cell, a femto-cell, a remote radio head, a relay node, etc. It is to be understood that the term “TRP” or panel may refer to a logical concept which may be physically implemented by various manner.
  • the TRP ID may be implicitly identified via control resource set (CORESET) Pool Index (CORESETPoolIndex) .
  • CORESET control resource set
  • CORESETPoolIndex pool Index
  • M-DCI multi-downlink control information
  • the TRP ID may implicitly identified via sounding reference signal (SRS) resource set ID for uplink (UL) transmission or via CSI-RS resource ID or CSI-RS resource set ID. Therefore, the term “TRP” can be used interchangeably with the terms “CORESETPoolIndex” and SRS resource set.
  • SRS sounding reference signal
  • a terminal device is configured by a higher layer parameter PDCCH-Config that contains two different values of CORESETPoolIndex in ControlResourceSet for the active bandwidth part (BWP) of a serving cell.
  • one CSI-RS resource in a plurality of CSI-RS resources may be associated with or may correspond to one TRP or one panel or one TRP group.
  • the terms “UE expects” , “UE does not expect, “terminal device expects” , “terminal device does not expect” may imply restrictions on a configuration of a network device (also referred to as NW configuration) .
  • NW configuration also referred to as NW configuration
  • the terms “UE is not expected to” and “terminal device is not expected to” may imply a terminal implementation, also referred to as UE implementation. In some embodiments, the terms “UE does not expect” and “UE is not expected to” may be used equally.
  • multi-TRP has been proposed and discussed in order to improve the reliability and robustness of the communication between the network device and the terminal device.
  • the backhaul/synchronization among the TRPs are non-ideal.
  • CJT coherent joint transmission
  • CJT assistance information may be reported to the network device in advance, the network performance may be improved accordingly.
  • the channel characteristics may be obtained by the terminal device, and some information may be reported to the network device for assistance.
  • the information may comprise at least one of: delay spread, frequency unit for precoding and hypothesis for multi-TRP transmission.
  • the assistance information may be for CJT transmission.
  • the terminal device receives first configuration information for at least one measurement report from the network device, where the first configuration information indicates a first plurality of channel state information (CSI) -reference signal (RS) resources.
  • the terminal device further transmits at least one measurement report to the network device, the at least one measurement report indicating at least one of the following: a first set of delay information in time domain or a second set of phase information in frequency domain.
  • the first/second sets are corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, and the delay/phase information comprised in the first/second set may be corresponding to a CSI-RS resource of the second plurality of CSI-RS resources.
  • the delay/phase information may be reported to the network device, such that the network device may understanding the delay-related information (i.e., the delay/phase information) and determine proper joint transmission (JT) (either CJT or NCJT) transmission decision for the terminal device.
  • JT joint transmission
  • the relayed report granularity may be more flexible.
  • the terminal device may obtain more accurate information on the channel characteristics, such as, the frequency offset, the delay spread, the frequency selection characteristics or the subband size, whether the TRP is suitable for CJT or NCJT and so on.
  • the above assistant information also may be comprised in the measurements report (s) and transmitted to the network device.
  • precoder “precoding” , “precoding matrix” , “beam” , “beamforming” , “vector” , “basis” , “first vector” , “first basis” , “first basis vector” , “codebook” , “UL codebook” , “spatial domain-related information” , “SD-related information” , “spatial relation information” , “spatial relation info” , “precoding information” , “precoding information and number of layers” , “precoding matrix indicator (PMI) ” , “precoding matrix indicator” , “transmission precoding matrix indication” , “precoding matrix indication” , “transmission configuration indication state (TCI state) ” , “UL TCI state” , “joint TCI state” , “transmission configuration indicator” , “quasi co-location (QCL) ” , “quasi-co-location” , “QCL parameter” , “QCL
  • vector As used herein, the terms “vector” , “vectors” , “bases” and “basis” can be used interchangeably.
  • index As used herein, the terms “index” , “indicator” , “indication” , “field” , “bit field” and “bitmap” can be used interchangeably.
  • physical resource block , “resource block” , “PRB” and “RB” can be used interchangeably.
  • bit size can be used interchangeably.
  • size of bits “number of bits” , “number of field” , “bitwidth” and “field size” can be used interchangeably.
  • size of , “number of RBs” , “number of subcarriers” and “number of PRBs” can be used interchangeably.
  • a TRP index As used herein, the terms “a TRP index” , “a panel index” , “a TRP group index” , “an CSI-RS resource index” , “a group of CSI-RS port indexes” , “a CSI-RS resource set” and “a set of CSI-RS resources” can be used interchangeably.
  • TRP time division multiple access
  • panel CSI-RS resource
  • SRS resource SRS resource
  • TCI state TCI
  • TCI CORESET
  • CORESET pool UL TCI state
  • DL TCI state DL TCI state
  • joint TCI state joint TCI state
  • diseparate TCI state may be used interchangeably.
  • multiple TRPs As used herein, the terms “multiple TRPs” , “multiple panels” , “multiple CSI-RS resources” , “plurality of CSI-RS resources” , “multiple TCI states” , “multiple CORESETs” and “multiple control resource set pools” , “multi-TRP” , “multi-TCI state” , “multi-TCI” , “multi-CORESET” and “multi-control resource set pool” , “M-TRP” and “M-TCI” , “M-TRP” may be used interchangeably.
  • vector As used herein, the terms “vector” , “basis” , “frequency domain/FD basis vector” , “frequency domain/FD vector” , “frequency domain/FD basis” , “first vector” and “first basis” may be used interchangeably.
  • the terms “measurement report” , “calibration report” , “assistant information report” , “report for assistance” or “pre CSI report” may be used interchangeably.
  • a message structure of the measurement report may have a similar message structure with the measurement report (such as, including two parts, i.e., part 1 and part 2) .
  • the transmission procedure (such as, omission) of the CSI report also may be reused by the measurement report.
  • L1-RSRP layer 1-reference signal received power
  • L1-SINR L1-signal to interference and noise ratio
  • example embodiments described with regard to the L1-RSRP may be equally applicable to other type of beam quality, including but not limited to L1/L3-RSRP, L1/L3-SINR, L1/L3 received signal strength indicator (RSSI) , L1/L3 reference signal received quality (RSRQ) , and so on.
  • the present disclosure is not limited in this regard.
  • a set of may mean one or more elements/items, which may be replaced by terms of “at least one” , “a group of” or “a list of” .
  • a set of X means “at least one X” or “one or more Xs” .
  • ⁇ refers to subcarrier spacing configuration;
  • the value of ⁇ may be at least one of ⁇ 0, 1, 2, 3, 4, 5, 6 ⁇ ;
  • P or P t refers to the number of ports associated with or comprised in one CSI-RS resource, where P or P t may be 1 or 2 or 4 or 8 or 12 or 16 or 24 or 32 or 64 or 96 or 128 or 256 or 512;
  • the CSI-RS resource may be comprised in the first plurality of CSI-RS resources.
  • different CSI-RS resources in the first plurality of CSI-RS resources may be associated with or may comprise different or same number of ports;
  • T u refers to time unit
  • F u refers to frequency unit
  • X refers to a multiple of the time unit
  • f refers to an index of the frequency domain basis
  • ⁇ refers to a phase information in frequency domain, where 0 ⁇ 1;
  • M or M CP refers to a positive integer
  • Tc/Ts refers to time unit used in the communication
  • ⁇ f max refers to a value of subcarrier spacing.
  • ⁇ f max may be 480kHz or 480 ⁇ 10 3 Hz or 960kHz or 960 ⁇ 10 3 Hz;
  • N f refers to a positive integer.
  • N f refers to a number of time units Tc or Ts.
  • N f may be 2048 or 4096;
  • ⁇ f ref refers to a value of subcarrier spacing.
  • a value of a reference subcarrier spacing For example, ⁇ f ref may be 15 kHz or 15 ⁇ 10 3 Hz;
  • N f, ref refers to a positive integer.
  • N f, ref may refer to a number of time units Tc or Ts.
  • N f, ref may be 2048 or 4096;
  • T max refers to a time duration.
  • T max may be a length of cyclic prefix (CP) or a duration of maximum receive timing difference;
  • Y refers to a positive integer
  • X refers to a positive integer
  • i fu refers to the index of frequency unit or frequency domain basis
  • B size refers to the number of resource blocks (RBs) in the reporting band or BWP;
  • F refers to the number of frequency units or frequency domain bases in the reporting band or BWP, F may be positive integer, e.g., 1 ⁇ F ⁇ 275;
  • N size refers to a reporting band.
  • N size may be a positive integer.
  • N start refers to a starting position of the BWP or a reporting band.
  • N start may be a non-negative integer. For example, 0 ⁇ N start ⁇ 275;
  • the size of one subband or the number of PRBs of one subband refers to the size of one subband or the number of PRBs of one subband. is a positive integer. For example, For example, may be at least one of ⁇ 4, 8, 16, 32 ⁇ ;
  • c p refers to a value of one indicator or one field for the phase information.
  • c p may be a non-negative integer.
  • c p may be at least one of ⁇ 0, 1, 2, 3 ⁇ or ⁇ 0, 1, 2, 3, 4, 5, 6, 7 ⁇ or ⁇ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 ⁇ .
  • N PSK may be the size for indication of c p .
  • N PSK may be a positive integer.
  • N PSK may be at least one of ⁇ 2, 4, 8, 16, 32, 64, 128, 256 ⁇ .
  • FIG. 1A illustrates an example communication network 100 in which embodiments of the present disclosure can be implemented.
  • the communication network 100 includes a network device 120-1 and an optionally network device 120-2 (collectively or individually referred to as network devices 120) .
  • the network device 120-1 is referred to as the first network device 120-1
  • the network device 120-2 is referred to as the second network device 120-2.
  • the first network device 120-1 and the second network device 120-2 can communicate with each other.
  • the network device 120 can provide services to a terminal device 110.
  • terminal device 110 operating as a UE
  • network device 120 operating as a base station
  • operations described in connection with a terminal device may be implemented at a network device or other device
  • operations described in connection with a network device may be implemented at a terminal device or other device.
  • a link from the network devices 120 (such as, a first network device 120-1 or the second network device 120-2) to the terminal device 110 is referred to as a DL
  • a link from the terminal device 110 to the network devices 120 (such as, a first network device 120-1 or the second network device 120-2) is referred to as an UL
  • the first network device 120-1 or the second network device 120-2 is a transmitting (TX) device (or a transmitter)
  • the terminal device 110 is a receiving (RX) device (or a receiver)
  • the terminal device 110 is a transmitting TX device (or a transmitter)
  • the first network device 120-1 or the second network device 120-2 is a RX device (or a receiver) .
  • the network device 120 may be equipped with one or more TRPs/panels.
  • the network device 120 may be coupled with multiple TRPs/panels in different geographical locations to achieve better coverage.
  • the first network device 120-1 is equipped with the first TRP 130-1 and the second TRP 130-2.
  • the first network device 120-1 and the second network device 120-2 are equipped with the first TRP 130-1 and the second 130-2, respectively.
  • the first network device 120-1 may be associated with at least one of the first TRP 130-1, the second TRP 130-2, the third TRP 130-3 and the fourth TRP 130-4.
  • the first TRP 130-1 and the second TRP 130-2 are associated with different control resource set pools (CORESET pools) .
  • the first TRP 130-1 is associated with a first control resource set pool while the second TRP 130-2 is associated with a second control resource set pool.
  • the first TRP 130-1 and the second TRP 130-2 and the third TRP 130-3 and the fourth TRP 130-4 may be associated with different CSI-RS resources in the first plurality of CSI-RS resources.
  • the first TRP 130-1 may be associated with a first CSI-RS resource.
  • the second TRP 130-2 may be associated with a second CSI-RS resource.
  • the third TRP 130-3 may be associated with a third CSI-RS resource.
  • the fourth TRP 130-4 may be associated with a fourth CSI-RS resource.
  • both a single TRP mode and multi-TRP mode are supported by the specific embodiment of FIG. 1A.
  • the terminal device 110 communicates with the network via the first TRP 130-1 or the second TRP 130-2 or via one of the first TRP 130-1, the second TRP 130-2, the third TRP 130-3 and the fourth TRP 130-4.
  • the transmission may be performed based on the first or the second control resource set pool, and one TCI state accordingly.
  • the terminal device 110 communicates with the network via the first TRP 130-1 and the second TRP 130-2 or via more than one TRP 130 from the first TRP 130-1, second TRP 130-2, third TRP 130-3 and fourth TRP 130-4.
  • the transmission may be performed based on the first and second control resource set pools, and two TCI states accordingly.
  • both a single DCI and multi-DCI mode are supported in communication network 100.
  • the terminal device 110 receives a single DCI message from the first TRP 130-1 or the second TRP 130-2 or the third TRP 130-3 or the fourth TRP 130-4. It should be understood that the single DCI message also may be received from the second TRP 130-2.
  • the terminal device 110 may receive more than one DCI message from more than one of the first TRP 130-1, the second TRP 130-2, the third TRP 130-3 and the fourth TRP 130-4, respectively.
  • the number of TRPs comprised in the communication network 100 may be larger than two.
  • the communication network 100 may further additionally comprise the TRP 130-3 and 130-4, and any of the TRP 130-3 and 130-4 may be equipped to the first network device 120-1 or the second network device 120-2.
  • the network device (s) 120 may provide one or more serving cells and the first TRP 130-1 and/or the second TRP 130-2 and/or the third TRP 130-3 and/or the fourth TRP 130-4 may be included in a same serving cell or different serving cells.
  • both an inter-cell transmission and an intra-cell transmission are supported by the specific example of FIG. 1A.
  • FIG. 1B shows an example scenario of the communication network 100 as shown in FIG. 1A.
  • the first TRP 130-1 and the second TRP 130-2 are included in a same serving cell 140.
  • the multi-TRP transmission is performed as an intra-cell transmission.
  • FIG. 1C shows another example scenario of the communication network 100 as shown in FIG. 1A.
  • the first TRP 130-1 and the second TRP 130-2 are included in different serving cells 140-1 and 140-2.
  • the multi-TRP transmission is performed as an inter-cell transmission.
  • the communications in the communication environment 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like.
  • GSM Global System for Mobile Communications
  • LTE Long Term Evolution
  • LTE-Evolution LTE-Advanced
  • NR New Radio
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • GERAN GSM EDGE Radio Access Network
  • MTC Machine Type Communication
  • Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
  • the communication network 100 may include any suitable numbers of devices adapted for implementing embodiments of the present disclosure.
  • the operations at the terminal device 110 and the network device 120 should be coordinated.
  • the network device 120 and the terminal device 110 should have common understanding about configurations, parameters and so on. Such common understanding may be implemented by any suitable interactions between the network device 120 and the terminal device 110 or both the network device 120 and the terminal device 110 applying the same rule/policy.
  • the corresponding operations should be performed by the network device 120.
  • the corresponding operations should be performed by the terminal device 110.
  • some operations are described from a perspective of the network device 120, it is to be understood that the corresponding operations should be performed by the terminal device 110.
  • some of the same or similar contents are omitted here.
  • some interactions are performed among the terminal device 110 and the network device 120 (such as, exchanging configuration (s) and so on) . It is to be understood that the interactions may be implemented either in one single signaling/message/configuration or multiple signaling/messages/configurations, including system information, radio resource control (RRC) message, downlink control information (DCI) message, uplink control information (UCI) message, media access control (MAC) control element (CE) and so on.
  • RRC radio resource control
  • DCI downlink control information
  • UCI uplink control information
  • CE media access control element
  • FIG. 2 illustrates a signaling flow 200 of communication in accordance with some embodiments of the present disclosure.
  • the signaling flow 200 will be discussed with reference to FIG. 1A to FIG. 1C, for example, by using the terminal device 110 and the network device 120.
  • the terminal device may receive 210 first configuration information for at least one measurement report from the network device 120, where the first configuration information at least indicates a first plurality of CSI-RS resources (For example, be represented as N candidate CSI-RS resources in the following, for example, CSI-RS resources #1, #2, #3 and #4) .
  • the first plurality of CSI-RS resources may comprise N candidate CSI-RS resources.
  • the first configuration information may comprise information indicating the first plurality of CSI-RS resources for channel measurement or for the measurement report.
  • the terminal device 110 may be configured with the first plurality of CSI-RS resources for the measurement report.
  • each CSI-RS resource may correspond to one TRP or TRP group, where an index of the CSI-RS resource may be represented as t.
  • t may be integer.
  • each CSI-RS resource in the first plurality of CSI-RS resources there may be P or P t ports for one CSI-RS resource, where P or P t may be 1 or 2 or 4 or 8 or 12 or 16 or 24 or 32 or 64 or 96 or 128 or 256 or 512.
  • each CSI-RS resource in the first plurality of CSI-RS resources may be CSI-RS for tracking, e.g. tracking RS (TRS) .
  • TRS tracking RS
  • the terminal device 110 may perform 220 measurements with the network device 120, such as, receive and measure CSI-RS from the network device 120.
  • the terminal device 110 may obtain some assistant information based on the first plurality of CSI-RS resources, such as, delay-related information.
  • the terminal device 110 may report such measurement results and other information which may assist transmission between the terminal device 110 and the network device 120.
  • the terminal device 110 may further transmit 230 at least one measurement report to the network device 120.
  • the at least one measurement report may comprise at least one of the following: a first set of delay information in time domain or a second set of phase information in frequency domain.
  • the first set and/or the second set may be corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, and the delay/phase information comprised in the first/second set may be corresponding to a CSI-RS resource of the second plurality of CSI-RS resources.
  • the first set and/or the second set may be corresponding to the first plurality of CSI-RS resources with a reference CSI-RS included or excluded, and each delay/phase indication/information comprised in the first/second set may be corresponding to a CSI-RS resource of the first plurality of CSI-RS resources.
  • the second plurality of CSI-RS resources may be the same as or a part of the first plurality of CSI-RS resources.
  • the first plurality of CSI-RS resources is ⁇ CSI-RS resource #1, CSI-RS resource #2, CSI-RS resource #3 and CSI-RS resource #4 ⁇
  • the second plurality of CSI-RS resources may be ⁇ CSI-RS resource #1, CSI-RS resource #2, CSI-RS resource #3 and CSI-RS resource #4 ⁇ or a subset of ⁇ CSI-RS resource #1, CSI-RS resource #2, CSI-RS resource #3 and CSI-RS resource #4 ⁇ .
  • the second plurality of CSI-RS may be determined by the terminal device based on the measurement results.
  • the reference CSI-RS resource may be a default CSI-RS resource, such as, the first CSI-RS resource or the CSI-RS resource with lowest ID or the first CSI-RS resource in time domain or the last CSI-RS resource in time domain in the first plurality of CSI-RS resources.
  • the information used for indicating the reference CSI-RS may be omitted.
  • the reference CSI-RS resource may be a CSI-RS resource with the minimum value of the delay information or the phase information. In some embodiments, the reference CSI-RS resource may be a CSI-RS resource with the largest value of amplitude coefficient or with largest value of RSRP.
  • the reference CSI-RS resource may be the one CSI-RS resource in the first or the second plurality with the lowest value of delay (such as, with the lowest value of delay of the first path or lowest average delay) .
  • the measurement values comprised in the measurement report may be a positive value or a non-negative integer.
  • the values of delay information comprised in the measurement report may be a positive value or a non-negative value.
  • the at least one measurement report may comprise at least one of the following:
  • a third set of doppler information in time domain the third set corresponding to the first plurality or the second plurality of CSI-RS resources, the doppler information comprised in the third set corresponding to a CSI-RS resource of the first plurality or the second plurality of CSI-RS resources,
  • CJT coherent joint transmission
  • NCJT non-CJT
  • the measurement report may comprise a first part and a second part associated with the first part.
  • the first part may indicate at least one of the following: the first granularity, the second granularity, the third granularity, the size of subband, the frequency unit, the first indication of the second plurality of CSI-RS resources, the second indication or the third indication.
  • the second part may indicate at least one of the following: the first set, the second set, the third set, the at least one frequency offset, the at least one amplitude coefficient or the third indication.
  • the measurement report may comprise a single part.
  • the measurement report may comprise two parts (e.g., first part and second part, or part 1 and part 2) .
  • the first part may have a fixed payload size and may be used to identify the number of information bits in the second part or the size of the second part.
  • the first part may be transmitted in its entirety before the second part.
  • the terminal device 110 may report (i.e., the measurement report may comprise) at least one delay indication/information (e.g., delay offset) or at least one phase indication/information in frequency domain.
  • the measurement report may comprise at least one delay indication/information (e.g., delay offset) or at least one phase indication/information in frequency domain.
  • the terminal device 110 may further report at least one of: a granularity of delay information (e.g. time unit, i.e. the first granularity) , a granularity of phase indication/information (i.e.
  • the second granularity a size of subband, a frequency unit, at least one frequency offset, at least one phase indication/information in time domain (i.e., doppler information) , a third granularity of the doppler information, at least one amplitude coefficient, at least one L1-RSRP or L1-SINR, a second plurality of CSI-RS resources, a type of CJT or NCJT, whether suitable for CJT and/or NCJT (i.e., the second indication) , whether suitable for multi-TRP transmission (i.e., the second indication) , and a reference CSI-RS resource (i.e., the third indication) .
  • the number of the second plurality of CSI-RS resources may be represented as N selected , where the N selected may be positive integer.
  • the number of the at least one delay indication/information and/or the number of the at least one phase indication/information and/or the number of the at least one phase indication/information in frequency domain and/or the number of the at least one phase indication/information in time domain and/or the number of the at least one doppler indication/information and/or the number of the at least one amplitude coefficient and/or the number of the at least one frequency offset and/or the number of the at least one L1-RSRP or L1-SINR may be based on the number of CSI-RS resources in the first plurality of CSI-RS resources (e.g. N candidate or N candidate -1) or based on the number of CSI-RS resources in the second plurality of CSI-RS resources (e.g., N selected or N selected -1) .
  • the number of the at least one delay indication/information and/or the number of the at least one phase indication/information and/or the number of the at least one phase indication/information in frequency domain and/or the number of the at least one phase indication/information in time domain and/or the number of the at least one doppler indication/information and/or the number of the at least one amplitude coefficient and/or the number of the at least one frequency offset and/or the number of the at least one L1-RSRP or L1-SINR may be N selected or N candidate (For example, in case that the reference CSI-RS is included or in case that the measurement report comprises at least one of one delay indication/information, one phase indication/information, one phase indication/information in frequency domain, one phase indication/information in time domain, one doppler indication/information, one amplitude coefficient, one frequency offset and one L1-RSRP or L1-SINR corresponding to the reference CSI-RS resource) .
  • the number of the at least one delay indication/information and/or the number of the at least one phase indication/information and/or the number of the at least one phase indication/information in frequency domain and/or the number of the at least one phase indication/information in time domain and/or the number of the at least one doppler indication/information and/or the number of the at least one amplitude coefficient and/or the number of the at least one frequency offset and/or the number of the at least one L1-RSRP or L1-SINR may be N selected -1 or N candidate -1 (For example, in case that the reference CSI-RS is excluded or in case that the measurement report does not comprise one delay indication/information and/or one phase indication/information and/or one phase indication/information in frequency domain and/or one phase indication/information in time domain and/or one doppler indication/information and/or one amplitude coefficient and/or one frequency offset and/or one L1-RSRP or L1-SINR corresponding to the reference CSI-RS resource.
  • the measurement value of the delay information or the phase information or the doppler information corresponding to the reference CSI-RS is 0 and thus may not be comprised in the measurement report.
  • the measurement value of the amplitude coefficient corresponding to the reference CSI-RS is 1 and thus may not be comprised in the measurement report) .
  • the delay indication/information may be represented as a multiple of a time unit.
  • the terminal device may report at least one delay information or the measurement report may comprise the at least one delay information, wherein each delay information may correspond to one CSI-RS resource in the first plurality or the second plurality of CSI-RS resources (For example, including or excluding the reference CSI-RS resource) .
  • the terminal device 110 may report at least one delay indication/information or the measurement report may comprise the at least one delay indication/information, wherein each delay indication/information may correspond to one CSI-RS resource in the first plurality or the second plurality of CSI-RS resources excluding the reference CSI-RS resource.
  • the delay indication/information corresponding to a CSI-RS resource may be an absolute value of a delay between the network device 120 and the terminal device 110.
  • the delay information of a CSI-RS resource may be a delay difference or a delay offset between the CSI-RS resource and the reference CSI-RS resource.
  • the delay indication/information may be a delay difference or a delay offset between the first path of the CSI-RS resource and the first path of the reference CSI-RS resource, or a delay difference or a delay offset between the average delay of the CSI-RS resource and the average delay of the reference CSI-RS resource, as illustrated in FIG. 3A, which illustrates an example of delay information 300A.
  • the phase indication/information may be a phase rotation or an index of frequency domain basis.
  • the frequency domain basis may correspond to a basis with a first length.
  • the first length may be a positive integer.
  • the first length may be no less than 1 and no larger than 275 or no larger than 2048.
  • the terminal device 110 may report at least one phase indication/information in frequency domain or the measurement report may comprise the at least one phase indication/information in frequency domain, where each phase indication/information in frequency domain may be a phase rotation corresponding to one CSI-RS resource in the first or second plurality of CSI-RS resources (For example, including or excluding the reference CSI-RS resource) .
  • the terminal device 110 may report at least one phase indication/information in frequency domain or the measurement report may comprise the at least one phase indication/information in frequency domain, wherein each delay information may correspond to one CSI-RS resource in the first plurality or the second plurality of CSI-RS resources excluding the reference CSI-RS resource.
  • FIG. 3B which illustrates an example of phrase information 300B.
  • the delay indication/information may be based on or may correspond to the first granularity and/or at least one first parameter.
  • the phase information may be based on or may correspond to the second granularity and/or the at least one first parameter.
  • the doppler information may be based on or may correspond to the third granularity and/or the at least one first parameter.
  • at least one of the first granularity, the second granularity or the third granularity may be based on the at least one first parameter.
  • the at least one first parameter may be configured by the network device 120 or reported by the terminal device 110.
  • the at least one first parameter may comprise at least one of the following:
  • BWP bandwidth part
  • the measurement report may be an initial measurement report or a subsequent measurement report
  • precoding matrix indicators per subband.
  • the at least one first parameter may comprise at least one of: a type of the measurement report (the type may be absolute value or relative value corresponding to the measurement report, or the type may be the initial measurement report or subsequent measurement report) , first granularity information, second granularity information, third granularity information, a time unit, a frequency unit, a size of subband (e.g., for PMI or precoding matrix or CQI) , the value of M or M CP , a frequency unit (such as, the number of RBs or subcarriers, which may be represented as S) or a parameter R for codebook (e.g., numberOfPMI-SubbandsPerCQI-Subband) and so on.
  • a type of the measurement report the type may be absolute value or relative value corresponding to the measurement report, or the type may be the initial measurement report or subsequent measurement report
  • first granularity information e.g., second granularity information, third granularity information
  • a time unit
  • the delay indication/information and/or the phase indication/information and/or the frequency offset indication/information and/or the doppler indication/information may be reported conditioned on the reported granularity of delay information (e.g., time unit) and/or the granularity of phase information and/or the granularity of doppler information and/or size of subband (or frequency unit) and/or the at least one first parameter.
  • delay information e.g., time unit
  • the terminal device may determine or report at least one delay indication/information (i.e., the first set) or the measurement report may comprise at least one delay indication/information.
  • each delay information may be represented as X*T u (for example, in time domain, e.g., each delay information may be represented in multiples of the time unit T u ) .
  • each delay information may be represented as frequency domain (FD) basis f.
  • the terminal device 110 may determine or report at least one phase indication/information (e.g. in frequency domain) or the measurement report may comprise at least one phase indication/information.
  • each phase information may be represented as ⁇ (e.g., in frequency domain, 0 ⁇ 1) .
  • the value of X or the value of f or the value of ⁇ may be comprised in the measurement report (e.g., in the second part of the measurement report) .
  • the value or the range or the size of the indication field of X or ⁇ or f and/or the value of time unit and/or the value of M or M CP and/or the value of a frequency unit may be based on the at least one first parameter and/or at least one of: size of reporting band, size of BWP, a value of subcarrier spacing.
  • the value or the range or the size of the indication field of X may be based on the value of M or M CP .
  • M or M CP may be a positive integer.
  • the value or the range or the size of the indication field of ⁇ or f may be based on the value of the number of RBs (e.g., represented as S) or the value of the number of subcarriers (e.g. represented as S) or the value of frequency unit or the size of subband.
  • the value of M may be predefined/fixed.
  • the value of M may be at least one of 1 or 2 or 4 or 6 or 8 or 12 or 16 or 32 or 64.
  • the value of M may be configured by the network device 120.
  • the value of M may be determined/reported by the terminal device 110 or may be comprised in the measurement report.
  • the reporting band may be for the measurement report.
  • the terminal device 110 may be configured with a number of PRBs for a bandwidth part (BWP) or with a size for the BWP or a number of PRBs for a reporting band for the measurement report.
  • the number of PRBs for the BWP or for the reporting band (e.g. represented as N size ) may be a positive integer.
  • N size may be a positive integer.
  • the terminal device may be configured with a starting position of the BWP or the reporting band (e.g. represented as N start ) .
  • N start may be a non-negative integer.
  • the starting position of the BWP or the reporting band and the number of PRBs for the BWP or the reporting band may be configured in one higher layer parameter.
  • the subband may correspond to a subband for CQI or CQI subband or CSI subband. In some embodiments, the subband may correspond to a subband for PMI or PMI subband d.
  • the size of one subband or the number of PRBs of one subband may be represented as and is a positive integer. For example, may be at least one of ⁇ 4, 8, 16, 32 ⁇ . In some embodiments, may be based on the value of N size . In some embodiments, if 24 ⁇ N BWP ⁇ 72, may be 4 or 8. For example, may be configured to be 4 or 8 based on one higher layer parameter for subband. In some embodiments, if 73 ⁇ N size ⁇ 144, may be 8 or 16. For example, may be configured to be 8 or 16 based on the higher layer parameter for subband. In some embodiments, if 145 ⁇ N size ⁇ 275, may be 16 or 32. For example, may be configured to be 16 or 32 based on the higher layer parameter for subband.
  • the total number of precoding matrices F or the number of frequency domain bases or the number of frequency units may be a positive integer. For example, 9 ⁇ F ⁇ 36. For another example, 1 ⁇ F ⁇ 38. For another example, 1 ⁇ F ⁇ 275. For example, For another example, For another example, For another example, For another example, For another example, For another example, For another example, For another example, For another example, For another example, For another example, For another example, For another example,
  • the first configuration information or the at least one first parameter may comprise the parameter R.
  • the parameter R (for example, represented as R) may be a positive integer.
  • R may be a positive integer.
  • R may be one of ⁇ 1, 2 ⁇ .
  • the value of F may be determined based on the parameter R and the number of subbands and/or the size of subband and/or the number of PRBs of BWP or reporting band.
  • the first precoding matrix corresponds to the first PRBs of the one of the plurality of subbands
  • the second precoding matrix corresponds to the last PRBs of the one of the plurality of subbands.
  • the first precoding matrix may correspond to the first PRBs of the first/beginning one of the plurality of subbands and the second precoding matrix corresponds to the last PRBs of the first/beginning one of the plurality of subbands.
  • the first precoding matrix may correspond to the first PRBs of the last/ending one of the plurality of subbands and the second precoding matrix may correspond to the last PRBs of the last/ending one of the plurality of subbands.
  • the measurement report may comprise the value of frequency unit (or the value of F) and the value of f.
  • one frequency domain basis or one first vector may be represented as wherein 0 ⁇ i ⁇ F-1. In some embodiments, one frequency domain basis or one first vector may be represented as
  • the measurement report may comprise the indication of value of frequency unit F u (or the indication of the value of F or the indication of the value of S or the indication of the value of R) and the indication of the value of f.
  • the measurement report may comprise the indication of value of M (or the indication of the value of M CP or the indication of the value of Y or the indication of the value of T u ) and the indication of the value of X.
  • the measurement report may comprise the indication of value of Z (or the indication of value of frequency unit F u or the indication of the value of F or the indication of the value of S or the indication of the value of R) and the indication of the value of ⁇ (or the indication of the value of W) .
  • the frequency domain basis resolution is different.
  • the granularity for delay/frequency information can be different , e.g., in case of large delay spread, the granularity for delay/phase information may be large.
  • the terminal device 110 may report or the measurement report may comprise the at least one first parameter (e.g. the time unit-related information or the frequency unit-related information) and the delay indication/information (or phase indication/information) corresponding to the at least one first parameter (e.g. the time unit-related information or the frequency unit-related information) to the network device 120 (e.g., the first and second sets and/or the first granularity and the second granularity) .
  • the at least one first parameter e.g. the time unit-related information or the frequency unit-related information
  • the delay indication/information or phase indication/information
  • the time unit T u may be any of below: M*64*T c or M*T s or M*64*T c /2 ⁇ or M*T s /2 ⁇ .
  • ⁇ may be index of subcarrier spacing.
  • X may be an integer. For example, 0 ⁇ X ⁇ 2048.
  • ⁇ f max 480 ⁇ 10 3 Hz
  • N f 4096.
  • ⁇ f ref 15 ⁇ 10 3 Hz
  • N f, ref 2048.
  • the association between the index of subcarrier spacing ⁇ and the value of subcarrier spacing ⁇ f is listed in below table 1.
  • the value of M and/or the value of the value of F and/or the value of M CP and/or the value or range of X and/or the value or range of ⁇ and/or the value or range of f may be different.
  • the value of M may be large (e.g., coarse adjustment based on the first report, and finer report can be based on CJT CSI with finer frequency domain basis offset) .
  • the value of M may be small.
  • Table 2 illustrates example values of X. In some embodiments, all or a subset of rows and/or all or a subset of columns in Table 2 may be applied.
  • 2 ⁇ may be phase rotation corresponding to the frequency unit F u , wherein the frequency unit F u may be the frequency bands (e.g., in term of hertz or Hz) of a number of resource blocks (RBs) S or a number of subcarriers S.
  • RBs resource blocks
  • the value of Z may depend on the at least one first parameter.
  • Z may be same as the number of frequency units F.
  • a value of one phase information may be In some embodiments, c p may be a value of one indicator or one field for the phase information. In some embodiments, c p may be a non-negative integer. In some embodiments, 0 ⁇ c p ⁇ N PSK -1. In some embodiments, 0 ⁇ c p ⁇ 255. In some embodiments, c p may be at least one of ⁇ 0, 1, 2, 3 ⁇ or ⁇ 0, 1, 2, 3, 4, 5, 6, 7 ⁇ or ⁇ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 ⁇ . In some embodiments, N PSK may be the size for indication of c p . In some embodiments, N PSK may be a positive integer. In some embodiments, N PSK may be at least one of ⁇ 2, 4, 8, 16, 32, 64, 128, 256 ⁇ .
  • the reporting band or BWP or the number or RBs of the reporting band or BWP may be divided into a plurality of frequency units.
  • each frequency unit may be associated with or may correspond to one index i fu .
  • the phase rotation for a frequency unit with index i fu may be represented as
  • the delay information may be represented as index of FD basis f.
  • f may be non-negative integer.
  • F may be the number of frequency units (e.g., in the reporting band or BWP) .
  • F may be positive integer. For example, 1 ⁇ F ⁇ 275.
  • B size may be the number of RBs in the reporting band or BWP.
  • table 3 and table 4 illustrates example values of F. In some embodiments, all or a subset of rows and/or all or a subset of columns in Table 3 may be applied. In some embodiments, all or a subset of rows and/or all or a subset of columns in Table 4 may be applied.
  • the second plurality of CSI-RS resources may be indicated by a bitmap corresponding to the first plurality of CSI-RS resources, where each bit value may indicate whether a corresponding CSI-RS resource is selected by the terminal device 110.
  • the first indication of the second plurality of CSI-RS resources may be a bitmap with N candidate bits, wherein each bit corresponds to one CSI-RS resource in the first plurality of CSI-RS resources.
  • the third indication of the reference CSI-RS resource may be a field with bits.
  • the first indication of the second plurality of CSI-RS resources may be in the first part of the measurement report, and the third indication of the reference CSI-RS resource may be in the second part of the measurement report.
  • the first indication of the second plurality of CSI-RS resources may be a bitmap with N candidate -1 bits, wherein each bit corresponds to one CSI-RS resource except the reference CSI-RS resource in the first plurality of CSI-RS resources.
  • the third indication of the reference CSI-RS resource may be a field with bits.
  • the first indication of the second plurality of CSI-RS resources and the third indication of the reference CSI-RS resource may be in first part or in the one part of the measurement report.
  • a measurement value of CSI-RS resource may be a pre-defined abnormal value, where the pre-defined abnormal value may be used for indicating the CSI-RS resource not selected by the terminal device 110 or the CSI-RS resource is not suitable of a joint transmission or multi-TRP transmission.
  • the candidate value of delay/phase/amplitude information may comprise a codepoint indicating invalid value for the information, e.g., indicating of “out of range” or “N/A” or the corresponding CSI-RS resource is not selected. In this case, there is no need of reporting of the second plurality of CSI-RS resources. That is, the above mentioned measurement value may imply the selection of the second plurality of CSI-RS resource.
  • the frequency offset and/or the phase information in time domain may indicate whether the offset is large or not, e.g., whether the related CSI-RS resource is suitable for CJT and/or NCJT transmission.
  • the frequency offset may be represented as F offset *15000*2 ⁇ /F granularity , where the F offset may be the frequency offset information in the measurement report, F granularity may be a positive integer, e.g., 1 ⁇ F granularity ⁇ 15000, and F offset may be integer, 0 ⁇ F offset ⁇ F granularity -1.
  • the value of amplitude coefficient in the measurement report may be at least one of or or or or or or or or
  • the amplitude coefficient in the measurement report may reuse amplitude coefficient in CSI report as below table.
  • the first part of the measurement report may comprise at least one of: a first indication of the second plurality of CSI-RS resources (such as, a bitmap) , a third indication of the reference CSI-RS resource, a (first) granularity of delay information, a size of subband, or a (second) granularity of phase offset.
  • the second part of the measurement report may comprise the information except the first part in the measurement report, e.g., at least one of:at least one delay indication/information, at least one frequency offset, at least one phase offset in time domain, at least one phase offset in frequency domain, at least one amplitude coefficient, the reference CSI-RS resource and so on.
  • the at least one measurement report may be configured to be a periodic, semi-persistent, aperiodic or event-triggered reporting.
  • the measurement report may be any of: a periodic report configured by network device 120, a semi-persistent report activated by network device 120, or an event triggered report (such as, an aperiodic report triggered by network device 120 or an aperiodic report triggered by terminal device 110) .
  • the terminal device 110 may transmit the at least one measurement report to the network device 120 if at least one of the following:
  • a computation requirement for the at least one measurement report may be met
  • a velocity of the terminal device 110 may be equal to or larger than a threshold velocity, or
  • a probability line-of-sight (LOS) may be equal to or higher than a threshold probability.
  • the terminal device 110 may transmit the at least one measurement report to the network device 120 in response to measurement results of a CSI-RS resource of the second plurality of CSI-RS resources being below a first criteria.
  • the measurement report may be triggered to be transmitted to the network device 120, wherein the at least one measurement value may be at least one of: delay information, phase information, frequency offset, or amplitude coefficient and so on.
  • the threshold time length may be a predefined/preconfigured time duration (e.g., the cyclic prefix length) .
  • the terminal device 110 may report the related CSI-RS resource to the network device 120 (such as, the second plurality of CSI-RS resources not including the reference CSI-RS resource) .
  • the terminal device 110 may stop the transmission of the at least one measurement report in response to values of the delay information or the phase information to be reported being smaller than or equal to a threshold.
  • the measurement report may be updated until the difference of the measurement value (s) corresponding to different CSI-RS resources within a threshold, wherein the threshold may be 0 or a value corresponding to the first information (such as, report unit, time unit) .
  • the at least one measurement report may comprise an initial measurement report and a subsequent measurement report, and wherein at least one of the following may be different between the initial measurement report and the subsequent measurement report: candidate values of a measurement result, candidate ranges of a measurement result, or bit size of a field indicating of a measurement result.
  • the terminal device 110 may further transmit at least CSI report to the network device 120.
  • the terminal device 110 may receive 250 second configuration information of the at least CSI report from the network device 120, where the second configuration information is determined by the network device 120 based on the at least measurement report, as discussed below.
  • the network device 120 may determine 240 a third plurality of CSI-RS resources (e.g., N TRP CSI-RS resources) for channel measurement (for example, a (CJT) CSI report) .
  • the third plurality of CSI-RS resources may be configured to the terminal device 110 by the network device 120.
  • the network device may configure the third plurality of CSI-RS resources (e.g., N TRP CSI-RS resources) for channel measurement (for example, a (CJT) CSI report) .
  • N TRP may be a positive integer.
  • the value of N TRP may be no larger than the value of N candidate .
  • the third plurality of CSI-RS resources may be same or a subset of the first plurality of CSI-RS resources.
  • the third plurality of CSI-RS resources may be same or a subset of the second plurality of CSI-RS resources.
  • the third plurality of CSI-RS resources may be configured with QCL parameters or TCI state associated with or including reference signal in the first or second plurality of CSI-RS resources except a delay parameter (either an average delay or a delay of the first path) .
  • a delay parameter either an average delay or a delay of the first path
  • the third plurality of CSI-RS resources may be the same or a subset of the first plurality or the second plurality of CSI-RS resources.
  • the first plurality of CSI-RS resources may be CSI-RS resources #1 to #4.
  • the second plurality of CSI-RS resources (which may be determined by the terminal device 110) may be CSI-RS resources #1 to #3.
  • the third plurality of CSI-RS resources may be selected by the network device 120 from the CSI-RS resources #1 to #3.
  • the first configuration information may further indicate a first sub-configuration of the first plurality CSI-RS resources and a second sub-configuration of the first plurality CSI-RS resources.
  • the at least one measurement report may be generated by the terminal device 110 based on the first sub-configuration and the at least CSI report may be generated based on the second sub-configuration.
  • the measurement report and the CSI report may correspond to different sub-configurations of a same configuration of CSI-RS resources.
  • a first sub-configuration e.g., corresponding to the first plurality of CSI-RS resources
  • the terminal device may assume a second sub-configuration (e.g., corresponding to the third or the second plurality of CSI-RS resources) transmitted.
  • the periodicity of the CSI-RS resources corresponding to the second sub-configuration may be no larger than the periodicity of the CSI-RS resources corresponding to the first sub-configuration.
  • the number of ports of the CSI-RS resources corresponding to the first sub-configuration may be less than the number of ports of the CSI-RS resources corresponding to the second sub-configuration.
  • the number of resources of the CSI-RS resources corresponding to the first sub-configuration may be larger than the number of resources of the CSI-RS resources corresponding to the second sub-configuration.
  • the terminal device 110 may perform at least one of the following:
  • the terminal device 110 may assume that the information comprised in the measurement report is applied after a second time duration from the last symbol of the first report. In addition, the terminal device 110 may assume the information comprised in the measurement report is valid or applied until a third time duration from the last symbol or the slot of the measurement report. In some embodiments, the second time duration may be a number of symbols, the third time duration may be a number of mili-seconds or slots/frames.
  • the downlink reference timing corresponding to one CSI-RS resource may be updated and/or the average delay in QCL parameters may be updated.
  • the terminal device 110 may transmit 205 capability-related information to the network device 120.
  • Example capability-related information may include at least one of the following:
  • the maximum number of the first plurality of CSI-RS resources supported by the terminal device 110 i.e., the maximum number of CSI-RS resources of the first plurality of CSI-RS resources
  • the maximum number of the second plurality of CSI-RS resources supported by the terminal device 110 i.e., support of reporting and/or maximum number (candidate value of N selected ) for second plurality of CSI-RS resources
  • the maximum number of the first set supported by the terminal device 110 i.e., support of reporting the number of delay information
  • the maximum number of the second set supported by the terminal device 110 i.e., Support of reporting the number of phase information
  • the maximum number of the at least one amplitude coefficient i.e., the support of reporting and/or number of amplitude coefficients
  • values of the size of subband supported by the terminal device 110 i.e., support of reporting and/or candidate values for size of subband (value of frequency unit) .
  • the following configuration information (such as, the first configuration information and the second configuration information) may be more proper.
  • FIG. 4 illustrates a flowchart of a communication method 400 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 400 will be described from the perspective of the terminal device 110 in FIG. 1A.
  • the terminal device receives, from a network device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources.
  • CSI channel state information
  • RS reference signal
  • the terminal device transmits, to the network device, the at least one measurement report indicating at least one of the following: At block 430, a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, wherein the second plurality of CSI-RS resources is the same as or a part of the first CSI-RS resources.
  • the at least one measurement report further indicates at least one of the following: a first granularity of the delay information corresponding to the first set, a second granularity of the phase information corresponding to the second set, a third set of doppler information in time domain, the third set corresponding to the second plurality of CSI-RS resources, the doppler information comprised in the third set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, a third granularity of the doppler information, a size of subband, a frequency unit, at least one frequency offset, at least one amplitude coefficient corresponding to the second plurality of CSI-RS resources, a first indication indicating the second plurality of CSI-RS resources, a second indication indicating a transmission type of coherent joint transmission (CJT) or non-CJT (NCJT) , or a third indication indicating the reference CSI-RS resource.
  • CJT coherent joint transmission
  • NCJT non-CJT
  • the measurement report comprises a first part and a second part associated with the first part, wherein the first part indicates at least one of the following: the first granularity, the second granularity, the third granularity, the size of subband, the frequency unit, the first indication of the second plurality of CSI-RS resources, the second indication or the third indication, and wherein the second part indicates at least one of the following: the first set, the second set, the third set, the at least one frequency offset, the at least one amplitude coefficient or the third indication.
  • the at least one measurement report is configured to be a periodic, semi-persistent, aperiodic or event-triggered reporting.
  • the processor is configured to further cause the terminal device to: transmit the at least one measurement report to the network device in response to: measurement results of a CSI-RS resource of the second plurality of CSI-RS resources being below a first criteria.
  • the processor is configured to further cause the terminal device to: stop the transmission of the at least one measurement report in response to: values of the delay information or the phase information to be reported being smaller than or equal to a threshold.
  • the processor is configured to further cause the terminal device to: transmit the at least one measurement report to the network device if at least one of the following: a computation requirement for the at least one measurement report is met, a velocity of the terminal device is equal to or larger than a threshold velocity (such as, a low speed, a velocity under a threshold) , or a probability line-of-sight (LOS) is equal to or higher than a threshold probability (i.e., a high probability with LOS) .
  • a threshold velocity such as, a low speed, a velocity under a threshold
  • LOS probability line-of-sight
  • the terminal device 110 may not update or drop the transmission of the measurement report.
  • the processor is configured to further cause the terminal device to: after transmitting the at least one measurement report, perform at least one of the following: assuming the at least one measurement report has been applied after a time duration from the last symbol of uplink resource carrying the at least one measurement report; determining a validation period for the at least one measurement report; or updating, based on the at least one measurement report, at least one of downlink reference timing parameters or quasi co-location (QCL) parameters.
  • the terminal device after transmitting the at least one measurement report, perform at least one of the following: assuming the at least one measurement report has been applied after a time duration from the last symbol of uplink resource carrying the at least one measurement report; determining a validation period for the at least one measurement report; or updating, based on the at least one measurement report, at least one of downlink reference timing parameters or quasi co-location (QCL) parameters.
  • QCL quasi co-location
  • the first configuration information further indicates: a first sub-configuration of the first plurality CSI-RS resources and a second sub-configuration of the first plurality CSI-RS resources, and wherein the at least one measurement report is generated by the terminal device based on the first sub-configuration.
  • the processor is configured to further cause the terminal device to: transmit at least CSI report to the network device, the at least CSI report being generated based on the second sub-configuration.
  • the processor is configured to further cause the terminal device to: prior to transmitting the at least CSI report, receive second configuration information of the at least CSI report from the network device, the second configuration information being determined by the network device based on the at least measurement report.
  • the at least one measurement report comprises an initial measurement report and a subsequent measurement report, and wherein at least one of the following is different between the initial measurement report and the subsequent measurement report: candidate values of a measurement result, candidate ranges of a measurement result, or bit size of a field indicating of a measurement result. That is because, the network device 120 may adjust the transmission of the CSI-RS, and the measurement value (s) of the subsequent measurement report should be smaller than the measurement value (s) of the initial measurement report.
  • the second plurality of CSI-RS resources is indicated by a bitmap corresponding to the first plurality of CSI-RS resources, each bit value indicating whether a corresponding CSI-RS resource is selected by the terminal device, or wherein a measurement value of CSI-RS resource is a pre-defined abnormal value, the pre-defined abnormal value used for indicating the CSI-RS resource is not selected by the terminal device or the CSI-RS resource is not suitable of a joint transmission.
  • the measurement value comprises at least one of the following: a value of the delay information, a value of the phase information, a value of the doppler information, a value of the amplitude information, or a value of the frequency offset.
  • the delay information is reported based on the first granularity and at least one first parameter
  • the phase information is reported based on the second granularity and the at least one first parameter
  • the doppler information is reported based on the first granularity and the at least one first parameter
  • at least one of the first, second or third granularity is reported based on the at least one first parameter
  • the at least one first parameter comprises at least one of the following: a size of reporting band, a size of bandwidth part (BWP) , a subcarrier spacing, whether the measurement report is an initial measurement report or a subsequent measurement report, a size of subband, a value of time unit, a value of frequency unit, or the number of precoding matrix indicators (PMIs) per subband.
  • BWP bandwidth part
  • PMIs precoding matrix indicators
  • the at least one first parameter is configured by the network device or reported by the network device.
  • the processor is configured to further cause the terminal device to: transmit, to the network device, capability-related information comprising at least one of the following: the maximum number of the first plurality of CSI-RS resources supported by the terminal device, the maximum number of the second plurality of CSI-RS resources supported by the terminal device, the maximum number of the first set supported by the terminal device, the maximum number of the second set supported by the terminal device, the maximum number of the third set supported by the terminal device, the maximum number of the at least one amplitude coefficient, the maximum number of the at least one frequency offset, values of the first granularity supported by the terminal device, values of the second granularity supported by the terminal device, values of the third granularity supported by the terminal device, or values of the size of subband supported by the terminal device.
  • capability-related information comprising at least one of the following: the maximum number of the first plurality of CSI-RS resources supported by the terminal device, the maximum number of the second plurality of CSI-RS resources supported by the terminal device, the maximum number of the first set supported
  • the reference CSI-RS resource is one of the following: a default CSI-RS resource, or a CSI-RS resource with the minimum value of the delay information or the phase information.
  • the delay information is a multiple of a time unit
  • the phase information is a phase rotation or an index of frequency domain basis.
  • the delay information of a CSI-RS resource is one of the following: an absolute value of a delay between the network device and the terminal device, or a delay different between the CSI-RS resource and the reference CSI-RS resource.
  • FIG. 5 illustrates a flowchart of a communication method 500 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 500 will be described from the perspective of the network device in FIG. 1A.
  • the network device transmits, to a terminal device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources.
  • CSI channel state information
  • RS reference signal
  • the network device receives, from the terminal device, the at least one measurement report indicating at least one of the following: a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, wherein the second plurality of CSI-RS resources is a same as or a part of the first CSI-RS resources.
  • the at least one measurement report further indicates at least one of the following: a first granularity of the delay information corresponding to the first set, a second granularity of the phase information corresponding to the second set, a third set of doppler information in time domain, the third set corresponding to the second plurality of CSI-RS resources, the doppler information comprised in the third set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, a third granularity of the doppler information, a size of subband, a frequency unit, at least one frequency offset, at least one amplitude coefficient corresponding to the second plurality of CSI-RS resources, a first indication indicating the second plurality of CSI-RS resources, a second indication indicating a transmission type of coherent joint transmission (CJT) or non-CJT (NCJT) , or a third indication indicating the reference CSI-RS resource.
  • CJT coherent joint transmission
  • NCJT non-CJT
  • the measurement report comprises a first part and a second part associated with the first part, wherein the first part indicates at least one of the following: the first granularity, the second granularity, the third granularity, the size of subband, the first indication indicating the second plurality of CSI-RS resources, the second indication or the third indication, and wherein the second part indicates at least one of the following: the first set, the second set, the third set, the at least one frequency offset, the at least one amplitude coefficient or the third indication.
  • the at least one measurement report is configured to be a periodic, semi-persistent, aperiodic or event-triggered reporting.
  • the processor is configured to further cause the network device to: update, based on the at least one measurement report, at least one of downlink reference timing parameters or quasi co-location (QCL) parameters within the validation period.
  • QCL quasi co-location
  • the first configuration information further indicates: a first sub-configuration of the first plurality CSI-RS resources and a second sub-configuration of the first plurality CSI-RS resources, and wherein the at least one measurement report is generated by the terminal device based on the first sub-configuration.
  • the processor is configured to further cause the network device to: receive at least CSI report to the network device, the at least CSI report being generated based on the second sub-configuration.
  • the processor is configured to further cause the network device to: determine second configuration information of the at least CSI report based on the at least measurement report; and transmit the second configuration information to the terminal device.
  • the at least one measurement report comprises an initial measurement report and a subsequent measurement report, and wherein at least one of the following is different between the initial measurement report and the subsequent measurement report: candidate values of a measurement result, candidate ranges of a measurement result, or bit size of a field indicating of a measurement result.
  • the second plurality of CSI-RS resources is indicated by a bitmap corresponding to the first plurality of CSI-RS resources, each bit value indicating whether a corresponding CSI-RS resource is selected by the terminal device, or wherein a measurement value of CSI-RS resource is a pre-defined abnormal value, the pre-defined abnormal value used for indicating the CSI-RS resource is not selected by the terminal device or the CSI-RS resource is not suitable of a joint transmission.
  • the measurement value comprises at least one of the following: a value of the delay information, a value of the phase information, a value of the doppler information, a value of the amplitude information, or a value of the frequency offset.
  • the delay information is reported based on the first granularity and at least one first parameter
  • the phase information is reported based on the second granularity and the at least one first parameter
  • the doppler information is reported based on the first granularity and the at least one first parameter
  • at least one of the first, second or third granularity is reported based on the at least one first parameter
  • the at least one first parameter comprises at least one of the following: a size of reporting band, a size of bandwidth part (BWP) , a subcarrier spacing, whether the measurement report is an initial measurement report or a subsequent measurement report, a size of subband, a value of time unit, a value of frequency unit, or the number of precoding matrix indicators (PMIs) per subband.
  • BWP bandwidth part
  • PMIs precoding matrix indicators
  • the at least one first parameter is configured by the network device or reported by the network device.
  • the processor is configured to further cause the network device to: receive, from the terminal device, capability-related information comprising at least one of the following: the maximum number of the first plurality of CSI-RS resources supported by the terminal device, the maximum number of the second plurality of CSI-RS resources supported by the terminal device, the maximum number of the first set supported by the terminal device, the maximum number of the second set supported by the terminal device, the maximum number of the third set supported by the terminal device, the maximum number of the at least one amplitude coefficient, the maximum number of the at least one frequency offset, values of the first granularity supported by the terminal device, values of the second granularity supported by the terminal device, values of the third granularity supported by the terminal device, or values of the size of subband supported by the terminal device.
  • capability-related information comprising at least one of the following: the maximum number of the first plurality of CSI-RS resources supported by the terminal device, the maximum number of the second plurality of CSI-RS resources supported by the terminal device, the maximum number of the first set supported
  • the reference CSI-RS resource is one of the following: a default CSI-RS resource, or a CSI-RS resource with the minimum value of the delay information or the phase information.
  • the delay information is a multiple of a time unit
  • the phase information is a phase rotation or an index of frequency domain basis.
  • the delay information of a CSI-RS resource is one of the following: an absolute value of a delay between the network device and the terminal device, or a delay different between the CSI-RS resource and the reference CSI-RS resource.
  • FIG. 6 is a simplified block diagram of a device 600 that is suitable for implementing embodiments of the present disclosure.
  • the device 600 can be considered as a further example implementation of any of the devices as shown in FIG. 1A. Accordingly, the device 600 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
  • the device 600 includes a processor 610, a memory 620 coupled to the processor 610, a suitable transceiver 640 coupled to the processor 610, and a communication interface coupled to the transceiver 640.
  • the memory 620 stores at least a part of a program 630.
  • the transceiver 640 may be for bidirectional communications or a unidirectional communication based on requirements.
  • the transceiver 640 may include at least one of a transmitter 642 and a receiver 644.
  • the transmitter 642 and the receiver 644 may be functional modules or physical entities.
  • the transceiver 640 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones.
  • the communication interface may represent any interface that is necessary for communication with other network elements, such as X2/Xn interface for bidirectional communications between eNBs/gNBs, S1/NG interface for communication between a Mobility Management Entity (MME) /Access and Mobility Management Function (AMF) /SGW/UPF and the eNB/gNB, Un interface for communication between the eNB/gNB and a relay node (RN) , or Uu interface for communication between the eNB/gNB and a terminal device.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • RN relay node
  • Uu interface for communication between the eNB/gNB and a terminal device.
  • the program 630 is assumed to include program instructions that, when executed by the associated processor 610, enable the device 600 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 6.
  • the embodiments herein may be implemented by computer software executable by the processor 610 of the device 600, or by hardware, or by a combination of software and hardware.
  • the processor 610 may be configured to implement various embodiments of the present disclosure.
  • a combination of the processor 610 and memory 620 may form processing means 650 adapted to implement various embodiments of the present disclosure.
  • the memory 620 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 620 is shown in the device 600, there may be several physically distinct memory modules in the device 600.
  • the processor 610 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 600 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • a terminal device comprising a circuitry.
  • the circuitry is configured to: receive, from a network device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources; and transmit, to the network device, the at least one measurement report indicating at least one of the following: a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, wherein the second plurality of CSI-RS resources is the same as or a part of the first plurality of
  • a network device comprising a circuitry.
  • the circuitry is configured to: transmit, to a terminal device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources; and receive , from the terminal device, the at least one measurement report indicating at least one of the following: a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, wherein the second plurality of CSI-RS resources is a same as or a part of the first
  • circuitry used herein may refer to hardware circuits and/or combinations of hardware circuits and software.
  • the circuitry may be a combination of analog and/or digital hardware circuits with software/firmware.
  • the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions.
  • the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software/firmware for operation, but the software may not be present when it is not needed for operation.
  • the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and/or firmware.
  • a terminal apparatus comprises means for receiving, from a network device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources; and means for transmitting, to the network device, the at least one measurement report indicating at least one of the following: means for a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or means for a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, means for wherein the second plurality of CSI-RS resources is the same as or a part of the first pluralit
  • the first apparatus may comprise means for performing the respective operations of the method 400. In some example embodiments, the first apparatus may further comprise means for performing other operations in some example embodiments of the method 400.
  • the means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
  • a network apparatus comprises means for transmitting, to a terminal device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources; and means for receiving , from the terminal device, the at least one measurement report indicating at least one of the following: means for a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or means for a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, means for wherein the second plurality of CSI-RS resources is a same as or a part of the
  • the second apparatus may comprise means for performing the respective operations of the method 500. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 500.
  • the means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
  • embodiments of the present disclosure provide the following aspects.
  • a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources; and transmit, to the network device, the at least one measurement report indicating at least one of the following: a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, wherein the second plurality of CSI-RS resources is the same as or a part of the first plurality of CSI-RS
  • the at least one measurement report further indicates at least one of the following: a first granularity of the delay information corresponding to the first set, a second granularity of the phase information corresponding to the second set, a third set of doppler information in time domain, the third set corresponding to the second plurality of CSI-RS resources, the doppler information comprised in the third set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, a third granularity of the doppler information, a size of subband, a frequency unit, at least one frequency offset, at least one amplitude coefficient corresponding to the second plurality of CSI-RS resources, a first indication indicating the second plurality of CSI-RS resources, a second indication indicating a transmission type of coherent joint transmission (CJT) or non-CJT (NCJT) , or a third indication indicating the reference CSI-RS resource.
  • CJT coherent joint transmission
  • NCJT non-CJT
  • the measurement report comprises a first part and a second part associated with the first part, wherein the first part indicates at least one of the following: the first granularity, the second granularity, the third granularity, the size of subband, the frequency unit, the first indication of the second plurality of CSI-RS resources, the second indication or the third indication, and wherein the second part indicates at least one of the following: the first set, the second set, the third set, the at least one frequency offset, the at least one amplitude coefficient or the third indication.
  • the at least one measurement report is configured to be a periodic, semi-persistent, aperiodic or event-triggered reporting.
  • the processor is configured to further cause the terminal device to: transmit the at least one measurement report to the network device in response to:measurement results of a CSI-RS resource of the second plurality of CSI-RS resources being below a first criteria.
  • the processor is configured to further cause the terminal device to: stop the transmission of the at least one measurement report in response to: values of the delay information or the phase information to be reported being smaller than or equal to a threshold.
  • the processor is configured to further cause the terminal device to: transmit the at least one measurement report to the network device if at least one of the following: a computation requirement for the at least one measurement report is met, a velocity of the terminal device is equal to or larger than a threshold velocity, or a probability line-of-sight (LOS) is equal to or higher than a threshold probability.
  • a computation requirement for the at least one measurement report is met
  • a velocity of the terminal device is equal to or larger than a threshold velocity
  • LOS probability line-of-sight
  • the processor is configured to further cause the terminal device to: after transmitting the at least one measurement report, perform at least one of the following: assuming the at least one measurement report has been applied after a time duration from the last symbol of uplink resource carrying the at least one measurement report; determining a validation period for the at least one measurement report; or updating, based on the at least one measurement report, at least one of downlink reference timing parameters or quasi co-location (QCL) parameters.
  • the terminal device after transmitting the at least one measurement report, perform at least one of the following: assuming the at least one measurement report has been applied after a time duration from the last symbol of uplink resource carrying the at least one measurement report; determining a validation period for the at least one measurement report; or updating, based on the at least one measurement report, at least one of downlink reference timing parameters or quasi co-location (QCL) parameters.
  • QCL quasi co-location
  • the first configuration information further indicates: a first sub-configuration of the first plurality CSI-RS resources and a second sub-configuration of the first plurality CSI-RS resources, and wherein the at least one measurement report is generated by the terminal device based on the first sub-configuration.
  • the processor is configured to further cause the terminal device to: transmit at least CSI report to the network device, the at least CSI report being generated based on the second sub-configuration.
  • the processor is configured to further cause the terminal device to: prior to transmitting the at least CSI report, receive second configuration information of the at least CSI report from the network device, the second configuration information being determined by the network device based on the at least measurement report.
  • the at least one measurement report comprises an initial measurement report and a subsequent measurement report, and wherein at least one of the following is different between the initial measurement report and the subsequent measurement report: candidate values of a measurement result, candidate ranges of a measurement result, or bit size of a field indicating of a measurement result.
  • the second plurality of CSI-RS resources is indicated by a bitmap corresponding to the first plurality of CSI-RS resources, each bit value indicating whether a corresponding CSI-RS resource is selected by the terminal device, or wherein a measurement value of CSI-RS resource is a pre-defined abnormal value, the pre-defined abnormal value used for indicating the CSI-RS resource is not selected by the terminal device or the CSI-RS resource is not suitable of a joint transmission.
  • the measurement value comprises at least one of the following: a value of the delay information, a value of the phase information, a value of the doppler information, a value of the amplitude information, or a value of the frequency offset.
  • the delay information is reported based on the first granularity and at least one first parameter
  • the phase information is reported based on the second granularity and the at least one first parameter
  • the doppler information is reported based on the first granularity and the at least one first parameter
  • at least one of the first, second or third granularity is reported based on the at least one first parameter
  • the at least one first parameter comprises at least one of the following: a size of reporting band, a size of bandwidth part (BWP) , a subcarrier spacing, whether the measurement report is an initial measurement report or a subsequent measurement report, a size of subband, a value of time unit, a value of frequency unit, or the number of precoding matrix indicators (PMIs) per subband.
  • BWP bandwidth part
  • PMIs precoding matrix indicators
  • the at least one first parameter is configured by the network device or reported by the network device.
  • the processor is configured to further cause the terminal device to: transmit, to the network device, capability-related information comprising at least one of the following: the maximum number of the first plurality of CSI-RS resources supported by the terminal device, the maximum number of the second plurality of CSI-RS resources supported by the terminal device, the maximum number of the first set supported by the terminal device, the maximum number of the second set supported by the terminal device, the maximum number of the third set supported by the terminal device, the maximum number of the at least one amplitude coefficient, the maximum number of the at least one frequency offset, values of the first granularity supported by the terminal device, values of the second granularity supported by the terminal device, values of the third granularity supported by the terminal device, or values of the size of subband supported by the terminal device.
  • capability-related information comprising at least one of the following: the maximum number of the first plurality of CSI-RS resources supported by the terminal device, the maximum number of the second plurality of CSI-RS resources supported by the terminal device, the maximum number of the first set supported
  • the reference CSI-RS resource is one of the following: a default CSI-RS resource, or a CSI-RS resource with the minimum value of the delay information or the phase information.
  • the delay information is a multiple of a time unit
  • the phase information is a phase rotation or an index of frequency domain basis.
  • the delay information of a CSI-RS resource is one of the following: an absolute value of a delay between the network device and the terminal device, or a delay different between the CSI-RS resource and the reference CSI-RS resource.
  • a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, first configuration information for at least one measurement report, the first configuration information indicating a first plurality of channel state information (CSI) -reference signal (RS) resources; and receive , from the terminal device, the at least one measurement report indicating at least one of the following: a first set of delay information in time domain, the first set corresponding to a second plurality of CSI-RS resources with a reference CSI-RS included or excluded, the delay information comprised in the first set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, or a second set of phase information in frequency domain, the second set corresponding to the second plurality of CSI-RS resources, the phase information comprised in the second set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, wherein the second plurality of CSI-RS resources is a same as or a part of the first CSI-RS resources
  • the at least one measurement report further indicates at least one of the following: a first granularity of the delay information corresponding to the first set, a second granularity of the phase information corresponding to the second set, a third set of doppler information in time domain, the third set corresponding to the second plurality of CSI-RS resources, the doppler information comprised in the third set corresponding to a CSI-RS resource of the second plurality of CSI-RS resources, a third granularity of the doppler information, a size of subband, a frequency unit, at least one frequency offset, at least one amplitude coefficient corresponding to the second plurality of CSI-RS resources, a first indication indicating the second plurality of CSI-RS resources, a second indication indicating a transmission type of coherent joint transmission (CJT) or non-CJT (NCJT) , or a third indication indicating the reference CSI-RS resource.
  • CJT coherent joint transmission
  • NCJT non-CJT
  • the measurement report comprises a first part and a second part associated with the first part, wherein the first part indicates at least one of the following: the first granularity, the second granularity, the third granularity, the size of subband, the first indication indicating the second plurality of CSI-RS resources, the second indication or the third indication, and wherein the second part indicates at least one of the following: the first set, the second set, the third set, the at least one frequency offset, the at least one amplitude coefficient or the third indication.
  • the at least one measurement report is configured to be a periodic, semi-persistent, aperiodic or event-triggered reporting.
  • the processor is configured to further cause the network device to: update, based on the at least one measurement report, at least one of downlink reference timing parameters or quasi co-location (QCL) parameters within the validation period.
  • QCL quasi co-location
  • the first configuration information further indicates: a first sub-configuration of the first plurality CSI-RS resources and a second sub-configuration of the first plurality CSI-RS resources, and wherein the at least one measurement report is generated by the terminal device based on the first sub-configuration.
  • the processor is configured to further cause the network device to: receive at least CSI report to the network device, the at least CSI report being generated based on the second sub-configuration.
  • the processor is configured to further cause the network device to: determine second configuration information of the at least CSI report based on the at least measurement report; and transmit the second configuration information to the terminal device.
  • the at least one measurement report comprises an initial measurement report and a subsequent measurement report, and wherein at least one of the following is different between the initial measurement report and the subsequent measurement report: candidate values of a measurement result, candidate ranges of a measurement result, or bit size of a field indicating of a measurement result.
  • the second plurality of CSI-RS resources is indicated by a bitmap corresponding to the first plurality of CSI-RS resources, each bit value indicating whether a corresponding CSI-RS resource is selected by the terminal device, or wherein a measurement value of CSI-RS resource is a pre-defined abnormal value, the pre-defined abnormal value used for indicating the CSI-RS resource is not selected by the terminal device or the CSI-RS resource is not suitable of a joint transmission.
  • the measurement value comprises at least one of the following: a value of the delay information, a value of the phase information, a value of the doppler information, a value of the amplitude information, or a value of the frequency offset.
  • the delay information is reported based on the first granularity and at least one first parameter
  • the phase information is reported based on the second granularity and the at least one first parameter
  • the doppler information is reported based on the first granularity and the at least one first parameter
  • at least one of the first, second or third granularity is reported based on the at least one first parameter
  • the at least one first parameter comprises at least one of the following: a size of reporting band, a size of bandwidth part (BWP) , a subcarrier spacing, whether the measurement report is an initial measurement report or a subsequent measurement report, a size of subband, a value of time unit, a value of frequency unit, or the number of precoding matrix indicators (PMIs) per subband.
  • BWP bandwidth part
  • PMIs precoding matrix indicators
  • the at least one first parameter is configured by the network device or reported by the network device.
  • the processor is configured to further cause the network device to: receive, from the terminal device, capability-related information comprising at least one of the following: the maximum number of the first plurality of CSI-RS resources supported by the terminal device, the maximum number of the second plurality of CSI-RS resources supported by the terminal device, the maximum number of the first set supported by the terminal device, the maximum number of the second set supported by the terminal device, the maximum number of the third set supported by the terminal device, the maximum number of the at least one amplitude coefficient, the maximum number of the at least one frequency offset, values of the first granularity supported by the terminal device, values of the second granularity supported by the terminal device, values of the third granularity supported by the terminal device, or values of the size of subband supported by the terminal device.
  • capability-related information comprising at least one of the following: the maximum number of the first plurality of CSI-RS resources supported by the terminal device, the maximum number of the second plurality of CSI-RS resources supported by the terminal device, the maximum number of the first set supported
  • the reference CSI-RS resource is one of the following: a default CSI-RS resource, or a CSI-RS resource with the minimum value of the delay information or the phase information.
  • the delay information is a multiple of a time unit
  • the phase information is a phase rotation or an index of frequency domain basis.
  • the delay information of a CSI-RS resource is one of the following: an absolute value of a delay between the network device and the terminal device, or a delay different between the CSI-RS resource and the reference CSI-RS resource.
  • a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
  • a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
  • a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
  • a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
  • a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
  • various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGS. 1 to 6.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • the machine readable medium may be a machine readable signal medium or a machine readable storage medium.
  • a machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • machine readable storage medium More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM portable compact disc read-only memory
  • magnetic storage device or any suitable combination of the foregoing.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente divulgation concernent une solution pour configurer et transmettre un ou plusieurs rapports de mesure. Dans une solution, un dispositif terminal reçoit, en provenance d'un dispositif de réseau, des premières informations de configuration pour au moins un rapport de mesure, les premières informations de configuration indiquant une première pluralité de ressources de signal de référence (RS) d'informations d'état de canal (CSI) ; et transmettre, au dispositif de réseau, ledit au moins un rapport de mesure indiquant au moins l'un des éléments suivants : un premier ensemble d'informations de retard dans le domaine temporel, ou un second ensemble d'informations de phase dans le domaine fréquentiel.
PCT/CN2023/106172 2023-07-06 2023-07-06 Dispositifs et procédés de communication Ceased WO2025007352A1 (fr)

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WO2021248431A1 (fr) * 2020-06-12 2021-12-16 Qualcomm Incorporated Configuration de mesure pour rapport de décalage doppler
WO2022032567A1 (fr) * 2020-08-13 2022-02-17 Qualcomm Incorporated Procédés de mesure et de rapport d'un décalage doppler

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US20210297116A1 (en) * 2018-08-08 2021-09-23 Sony Corporation Multiple transmission panels and non-ideal backhaul links
US20210028843A1 (en) * 2019-07-26 2021-01-28 Hua Zhou Channel State Information Reporting for Non-Coherent Joint Transmission
WO2021248431A1 (fr) * 2020-06-12 2021-12-16 Qualcomm Incorporated Configuration de mesure pour rapport de décalage doppler
WO2022032567A1 (fr) * 2020-08-13 2022-02-17 Qualcomm Incorporated Procédés de mesure et de rapport d'un décalage doppler

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