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EP-4173177-B1 - TECHNIQUES FOR CROSS-BAND CHANNEL PREDICTION AND REPORTING

EP4173177B1EP 4173177 B1EP4173177 B1EP 4173177B1EP-4173177-B1

Inventors

  • PEZESHKI, HAMED
  • LUO, TAO
  • CHENDAMARAI KANNAN, ARUMUGAM

Dates

Publication Date
20260506
Application Date
20210630

Claims (15)

  1. A method (700) of wireless communication performed by a user equipment, UE, (120) comprising: receiving (710) a reference signal in a first frequency band of a first frequency range; performing (720) a measurement of the reference signal; determining (730) a predicted measurement in a second frequency band of a second frequency range using a model and based at least in part on the measurement of the reference signal received in the first frequency band of the first frequency range; wherein the second frequency band is different from the first frequency band; and transmitting (740) measurement information for the second frequency band based at least in part on the predicted measurement.
  2. The method of claim 1, further comprising: transmitting a request for the reference signal in the first frequency band; and receiving the reference signal in the first frequency band based at least in part on the request; or wherein the model is a machine learning model that is trained based at least in part on a training set of measurements in the first frequency band and measurements in the second frequency band.
  3. The method of claim 1, wherein the model receives, as input, information identifying at least one of: the measurement, angle of arrival information of a channel associated with the reference signal, angle of departure information associated with the channel, an estimated power delay profile associated with the channel, information indicating the first frequency band, information indicating the second frequency band, or position information for the UE.
  4. The method of claim 1, wherein the model outputs information indicating one or more beam directions associated with the predicted measurement.
  5. The method of claim 1, further comprising: updating the model using a machine learning algorithm based at least in part on comparing the predicted measurement to an observed measurement in the second frequency band.
  6. The method of claim 1, wherein an uplink control channel on a primary cell or a primary secondary cell in the first frequency range and an uplink control channel on a secondary cell in the second frequency range are configured, and wherein the method further comprises: transmitting at least part of the measurement information on the uplink control channel in the second frequency range.
  7. The method of claim 6, wherein the measurement information on the uplink control channel in the second frequency range includes a flag indicating that the predicted measurement is based at least in part on a prediction.
  8. The method of claim 6, wherein the measurement information on the uplink control channel in the second frequency range includes a flag indicating that the predicted measurement is determined using the model.
  9. The method of claim 1, wherein an uplink control channel on a primary cell or a primary secondary cell in the first frequency range is configured, and wherein transmitting the measurement information further comprises: transmitting the measurement information on the uplink control channel in the first frequency range.
  10. The method of claim 9, wherein the measurement information includes measurement information for the measurement on the reference signal received in the first frequency band and wherein the predicted measurement in the second frequency band comprises a predicted channel measurement.
  11. The method of claim 1, wherein the reference signal is a channel state information reference signal.
  12. The method of claim 1, wherein the measurement is performed in the first frequency band.
  13. The method of claim 1, wherein the measurement information identifies the predicted measurement in the second frequency band.
  14. A computer program, comprising instructions, which when executed by a computer, cause the computer to perform the method of any one of the claims 1-13.
  15. An apparatus (120) for wireless communication, comprising: means for receiving a reference signal in a first frequency band of a first frequency range; means for performing a measurement of the reference signal; means for determining a predicted measurement in a second frequency band of a second frequency range using a model and based at least in part on the measurement of the reference signal received in the first frequency band of the first frequency range; wherein the second frequency band is different from the first frequency band; and means for transmitting measurement information for the second frequency band based at least in part on the predicted measurement.

Description

FIELD OF THE DISCLOSURE Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for cross-band channel prediction and reporting. DESCRIPTION OF RELATED ART Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP). A wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs). A user equipment (UE) may communicate with a base station (BS) via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a New Radio (NR) BS, a 5G Node B, or the like. The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. New Radio (NR), which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful. CN110034792A provides a multi-input multi-output transmission method in which a known CSI under a first symbol is utilized to predict CSI for future symbols. SUMMARY An aspect described herein relates to a method of wireless communication performed by a user equipment (UE). The method includes receiving a reference signal in a first frequency band of a first frequency range. The method includes performing a measurement of the reference signal. The method includes determining a predicted measurement in a second frequency band of a second frequency range using a model and based at least in part on the measurement of the reference signal received in the first frequency band of the first frequency range. The method includes transmitting measurement information for the second frequency band based at least in part on the predicted measurement. Other aspects described herein relate to an apparatus for wireless communication and a computer program, both to perform said method. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims. BRIEF DESCRIPTION OF THE DRAWINGS So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements. Fig. 1 is a diagram illustrating an example of a wireless network, in accordance with the pre