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EP-4740350-A1 - DEVICES AND METHODS FOR COMMUNICATION

EP4740350A1EP 4740350 A1EP4740350 A1EP 4740350A1EP-4740350-A1

Abstract

Embodiments of the present disclosure provide a solution for configurating and transmitting a measurement report (s). In a solution, a 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; 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, or a second set of phase information in frequency domain.

Inventors

  • GUAN, PENG
  • WANG, GANG
  • GAO, Yukai

Assignees

  • NEC Corporation

Dates

Publication Date
20260513
Application Date
20230706

Claims (20)

  1. 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 resources.
  2. The terminal device of claim 1, wherein 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.
  3. The terminal device of claim 2, wherein 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.
  4. The terminal device of claim 1, wherein the at least one measurement report is configured to be a periodic, semi-persistent, aperiodic or event-triggered reporting.
  5. The terminal device of claim 1, wherein 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, or 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.
  6. The terminal device of claim 1, wherein 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.
  7. The terminal device of claim 1, wherein 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.
  8. The terminal device of claim 1, wherein 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.
  9. The terminal device of claim 8, 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.
  10. The terminal device of claim 9, 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.
  11. The terminal device of claim 1, wherein 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.
  12. The terminal device of claim 2, wherein 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.
  13. The terminal device of claim 11 or 13, wherein 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.
  14. The terminal device of claim 2, wherein, 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, and wherein 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.
  15. The terminal device of claim 14, wherein the at least one first parameter is configured by the network device or reported by the network device.
  16. The terminal device of claim 1, wherein 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.
  17. The terminal device of claim 1, wherein 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.
  18. The terminal device of claim 1, wherein the delay information is a multiple of a time unit, and the phase information is a phase rotation or an index of frequency domain basis.
  19. The terminal device of claim 1, wherein 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.
  20. 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 CSI-RS resources.

Description

DEVICES AND METHODS FOR COMMUNICATION FIELDS 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) . BACKGROUND Technology of multiple input multiple output (MIMO) has been widely used in current wireless communication system, where a large number of antenna elements are used by a network device for communicating with a terminal device for both sub-6GHz and over-6GHz frequency bands. Further, in order to improve the reliability and robustness of the communication between the network device and the terminal device, technology of multi-transmission and reception point (multi-TRP/M-TRP) has been proposed and discussed. In release 19, user equipment (UE) assistance/report for non-ideal backhaul/synchronization for coherent joint transmission (CJT) may be introduced. However, the backhaul/synchronization among the TRPs are non-ideal. In this event, impairments such as inter-TRP phase/delay and frequency offsets are present, especially for inter-site M-TRP, causing large throughput degradation. In view of this, in case of non-ideal backhaul/synchronized multi-TRP for CJT, if CJT assistance information may be reported to the network device in advance, the network performance may be improved accordingly. SUMMARY In general, embodiments of the present disclosure provide a solution for configurating and transmitting a measurement report (s) . In a first aspect, there is provided 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 resources. In a second aspect, there is provided 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 CSI-RS resources. In a third aspect, there is provided 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 resources. In a fourth aspect, there is provid