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EP-4201014-B1 - CSI REPORTING WITH INDICATION OF A RECOMMENDED SUBCARRIER SPACING VALUE

EP4201014B1EP 4201014 B1EP4201014 B1EP 4201014B1EP-4201014-B1

Inventors

  • BHAMRI, ANKIT
  • ALI, Ali Ramadan
  • GANESAN, KARTHIKEYAN
  • NANGIA, VIJAY
  • CHEEMA, Sher Ali

Dates

Publication Date
20260506
Application Date
20210818

Claims (10)

  1. A method (500) performed by a user equipment, UE, the method (500) comprising: receiving (502) a configuration from a network device for a channel state information, CSI, report, the report comprising an indication of at least one recommended subcarrier spacing value for transmitting a physical channel, receiving the physical channel, or a combination thereof; in response to receiving the configuration (504), estimating the at least one subcarrier spacing value by calculating a Doppler spread, an average delay, a delay spread, a phase noise power, an inter carrier interference level, or some combination thereof; and transmitting (506) the report comprising the indication of the at least one subcarrier spacing value to the network device, wherein each bandwidth part is associated with one subcarrier spacing value and the user equipment implicitly reports the at least one subcarrier spacing value by reporting at least one index of a bandwidth part.
  2. The method (500) of claim 1, further comprising transmitting information indicating a capability to support a set of subcarrier spacing values corresponding to a frequency band, wherein the at least one subcarrier spacing value indicated in the report is part of the set of subcarrier spacing values.
  3. The method (500) of claim 2, wherein a first number of bits required for the indication in the report is determined based on a number of subcarriers spacing values in the set of subcarrier spacing values indicated as capability information.
  4. The method (500) of claim 1, wherein a second number of bits required for the indication in the report is determined based on a number of bandwidth parts configured for the device and subcarrier spacing values associated with the bandwidth parts for transmission, reception, or a combination thereof.
  5. An apparatus (200) comprising a user equipment, UE, the apparatus (200) further comprising: a receiver (212) arranged to receive a configuration from a network device for a channel state information, CSI, report, the report comprising an indication of at least one recommended subcarrier spacing value for transmitting a physical channel, receiving the physical channel, or a combination thereof; a processor (202) arranged to, in response to receiving the configuration, estimate the at least one subcarrier spacing value by calculating a Doppler spread, an average delay, a delay spread, a phase noise power, an inter carrier interference level, or some combination thereof; and a transmitter (210) arranged to transmit the report comprising the indication of the at least one subcarrier spacing value to the network device, wherein each bandwidth part is associated with one subcarrier spacing value and the user equipment implicitly reports the at least one subcarrier spacing value by reporting at least one index of a bandwidth part.
  6. The apparatus (200) of claim 5, wherein the transmitter (210) is further arranged to transmit information indicating a capability to support a set of subcarrier spacing values corresponding to a frequency band, wherein the at least one subcarrier spacing value indicated in the report is part of the set of subcarrier spacing values.
  7. The apparatus (200) of claim 6, wherein the processor (202) is further arranged to determine a first number of bits required for the indication in the report based on a number of subcarriers spacing values in the set of subcarrier spacing values indicated as capability information.
  8. The apparatus (200) of claim 5, wherein the processor (202) is further arranged to determine a second number of bits required for the indication in the report based on a number of bandwidth parts configured for the device and subcarrier spacing values associated with the bandwidth parts for transmission, reception, or a combination thereof.
  9. An apparatus (300) comprising a network device, the apparatus further comprising: a transmitter (310) arranged to transmit a configuration to a user equipment for a channel state information, CSI, report, the report comprising an indication of at least one recommended subcarrier spacing value for transmitting a physical channel, receiving the physical channel, or a combination thereof; and a receiver (312) arranged to receive the report comprising the indication of the at least one subcarrier spacing value from the user equipment, wherein the at least one subcarrier spacing value is estimated based on a Doppler spread, an average delay, a delay spread, a phase noise power, an inter carrier interference level, or some combination thereof, wherein each bandwidth part is associated with one subcarrier spacing value and the user equipment implicitly reports the at least one subcarrier spacing value by reporting at least one index of a bandwidth part.
  10. A processor (202) for use in a user equipment for wireless communication, comprising: at least one controller coupled with at least one memory (204) and configured to cause the processor (202) to: input a configuration from a network device for a channel state information, CSI, report, the report comprising an indication of at least one recommended subcarrier spacing value for transmitting a physical channel, receiving the physical channel, or a combination thereof; in response to inputting the configuration, estimate the at least one subcarrier spacing value by calculating a Doppler spread, an average delay, a delay spread, a phase noise power, an inter carrier interference level, or some combination thereof; and output the report comprising the indication of the at least one subcarrier spacing value to the network device, wherein each bandwidth part is associated with one subcarrier spacing value and the processor implicitly reports the at least one subcarrier spacing value by reporting at least one index of a bandwidth part.

Description

FIELD The subject matter disclosed herein relates generally to wireless communications and more particularly relates to indicating a subcarrier spacing value. BACKGROUND In certain wireless communications networks, a subcarrier spacing may not be optimal for a certain communication. In such networks, a network device may not have all information needed to select a best subcarrier spacing. WO 2019/125234 A1 describes a method for improving transmission link performance. BRIEF SUMMARY The invention is defined by the appended claims. Claim 1 defines a method. Claims 5, 8 and 10 define an apparatus. In the following, any method and/or apparatus referred to as embodiments but nevertheless do not fall within the scope of the appended claims are to be understood as examples helpful in understanding the invention. Methods for indicating a subcarrier spacing value are disclosed. Apparatuses and systems also perform the functions of the methods. One embodiment of a method performed by a user equipment is defined in independent claim 1. One apparatus for indicating a subcarrier spacing value comprises a user equipment and is defined in independent claim 5. Another apparatus for indicating a subcarrier spacing value includes a network device, as defined in independent claim 9. One embodiment of a processor for a user equipment is defined in independent claim 10. BRIEF DESCRIPTION OF THE DRAWINGS A more particular description of the embodiments briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only some embodiments and are not therefore to be considered to be limiting of scope, the embodiments will be described and explained with additional specificity and detail through the use of the accompanying drawings, in which: Figure 1 is a schematic block diagram illustrating one embodiment of a wireless communication system for indicating a subcarrier spacing value;Figure 2 is a schematic block diagram illustrating one embodiment of an apparatus that may be used for indicating a subcarrier spacing value;Figure 3 is a schematic block diagram illustrating one embodiment of an apparatus that may be used for indicating a subcarrier spacing value;Figure 4 is a schematic block diagram illustrating one embodiment of link adaptation with an SCS indication;Figure 5 is a flow chart diagram illustrating one embodiment of a method for indicating a subcarrier spacing value; andFigure 6 is a flow chart diagram illustrating another embodiment of a method for indicating a subcarrier spacing value. DETAILED DESCRIPTION As will be appreciated by one skilled in the art, aspects of the embodiments may be embodied as a system, apparatus, method, or program product. Accordingly, embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a "circuit," "module" or "system." Furthermore, embodiments may take the form of a program product embodied in one or more computer readable storage devices storing machine readable code, computer readable code, and/or program code, referred hereafter as code. The storage devices may be tangible, non-transitory, and/or non-transmission. The storage devices may not embody signals. In a certain embodiment, the storage devices only employ signals for accessing code. Certain of the functional units described in this specification may be labeled as modules, in order to more particularly emphasize their implementation independence. For example, a module may be implemented as a hardware circuit comprising custom very-large-scale integration ("VLSI") circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like. Modules may also be implemented in code and/or software for execution by various types of processors. An identified module of code may, for instance, include one or more physical or logical blocks of executable code which may, for instance, be organized as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may include disparate instructions stored in different locations which, when joined logically together, include the module and achieve the stated purpose for the module. Indeed, a module of code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Similarly, operational data may be identified and illustrated herein within modules, and may be embodied in any suitable form and