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EP-4738756-A2 - METHODS, APPARATUSES AND SYSTEMS DIRECTED TO ENABLING TONE RESERVATIONS IN WIRELESS SYSTEMS

EP4738756A2EP 4738756 A2EP4738756 A2EP 4738756A2EP-4738756-A2

Abstract

Methods, apparatuses, systems, etc., directed to performing a change of relay are disclosed herein. In an embodiment, a wireless transmit/receive unit (WTRU) may transmit an information for requesting a peak reduction tone (PRT) configuration for reducing a peak to average power ratio (PAPR). In an embodiment, the WTRU may receive an indication of frequency resources to be used for transmitting a PRT signal based on the PRT configuration. In an embodiment, the WTRU may transmit the PRT signal in the frequency resources in addition to an uplink (UL) transmission, wherein the frequency resources for the PRT signal may be allocated based on a set of frequency resources allocated to the UL transmission.

Inventors

  • EL HAMSS, Aata
  • MARINIER, PAUL
  • LEE, MOON IL
  • STERN-BERKOWITZ, JANET
  • COMSA, VIRGIL
  • HASEGAWA, FUMIHIRO

Assignees

  • InterDigital Patent Holdings, Inc.

Dates

Publication Date
20260506
Application Date
20211013

Claims (15)

  1. A wireless transmit/receive unit, WTRU, comprising circuitry, including a transmitter, a receiver, a processor and memory, configured to: receive configuration information indicating at least one association between at least one tone reservation, TR, configuration and at least one sounding reference signal, SRS, resource; select a requested TR configuration from the at least one TR configuration; transmit an SRS in an SRS resource associated with the requested TR configuration according to the at least one association, wherein transmitting in the SRS resource indicates the requested TR configuration; and receive TR-related information indicating the requested TR configuration or a different TR configuration.
  2. The WTRU of claim 1, wherein being configured to select the requested TR configuration comprises being configured to select the requested TR configuration in accordance with any of (1) a power headroom, (2) a transmit power level of a previous uplink transmission, (3) a measurement of reference signals, (4) a type of uplink transmission, and (5) a target block error rate.
  3. The WTRU of any of claims 1 to 2, wherein the configuration information further indicates a plurality of TR configurations and a plurality of SRS resources, and wherein each TR configuration of the plurality of TR configurations is associated with a corresponding SRS resource of the plurality of SRS resources.
  4. The WTRU of any of claims 1 to 3, wherein being configured to transmit the SRS in the SRS resource comprises being configured to transmit the SRS in a time-frequency location that identifies the requested TR configuration.
  5. The WTRU of any of claims 1 to 4, wherein the TR-related information is received in at least one of: (i) downlink control information, DCI, (ii) a medium-access control, MAC, control element, or (iii) a radio resource control, RRC, message.
  6. The WTRU of any of claims 1 to 5, wherein being configured to transmit the SRS comprises being configured to transmit the SRS together with assisting information for selecting a TR configuration, wherein the assisting information comprises a power offset between a power level used for a data transmission and a power level used for a TR transmission.
  7. The WTRU of any of claims 1 to 6, further configured to determine that a triggering condition is satisfied prior to selecting the requested TR configuration, wherein the triggering condition comprises any of: (i) a power headroom less than a threshold, (ii) a reception of at least one power-up transmit power control command, and (iii) a detection of a path-loss condition.
  8. The WTRU of any of claims 1 to 7, wherein the TR-related information indicates any of: (i) a number of resource blocks reserved for TR transmission, (ii) a power offset for a TR transmission relative to a data transmission, (iii) a frequency-domain location of TR resources, (iv) at least one subframe or slot where a TR configuration applies, or (v) a density indication indicating whether TR transmission is contiguous or non-contiguous with data transmission..
  9. The WTRU of any of claims 1 to 8, further configured to perform a transmission after receiving the TR-related information, wherein the transmission comprises: (i) a data transmission in a first set of frequency resources at a first power level, and (ii) a TR transmission in a second set of frequency resources at a second power level lower than the first power level.
  10. The WTRU of claim 9, wherein the first set of frequency resources for the data transmission is adjacent to the second set of frequency resources for the TR transmission.
  11. A method implemented by a wireless transmit/receive unit, WTRU, the method comprising: receiving configuration information indicating at least one association between at least one tone reservation, TR, configuration and at least one sounding reference signal, SRS, resource; selecting a requested TR configuration from the at least one TR configuration; transmitting an SRS in an SRS resource associated with the requested TR configuration according to the at least one association, wherein transmitting in the SRS resource indicates the requested TR configuration; and receiving TR-related information indicating the requested TR configuration or a different TR configuration.
  12. The method of claim 11, wherein selecting the requested TR configuration comprises selecting the requested TR configuration in accordance with any of (1) a power headroom, (2) a transmit power level of a previous uplink transmission, (3) a measurement of reference signals, (4) a type of uplink transmission, and (5) a target block error rate.
  13. The method of any of claims 11 to 12, wherein the configuration information further indicates a plurality of TR configurations and a plurality of SRS resources, and wherein each TR configuration of the plurality of TR configurations is associated with a corresponding SRS resource of the plurality of SRS resources.
  14. The method of any of claims 11 to 13, wherein transmitting the SRS in the SRS resource comprises transmitting the SRS in a time-frequency location that identifies the requested TR configuration.
  15. The method of any of claims 11 to 14, wherein the TR-related information is received in at least one of: (i) downlink control information, DCI, (ii) a medium-access control, MAC, control element, or (iii) a radio resource control, RRC, message.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of U.S. Provisional Patent Application Nos. (i) 63/091,344 filed 14-10-2020, and (ii) 63/228,724 filed 03-08-2021, each of which is incorporated herein by reference. BACKGROUND The present disclosure relates to network communications, including, but not exclusively, to methods, apparatuses, systems, etc. directed to enabling tone reservation (TR) in wireless systems. SUMMARY Methods, apparatuses, systems, etc., directed to enabling tone reservation (TR) in wireless systems are disclosed herein. In an embodiment, a wireless transmit/receive unit (WTRU) may transmit an information for requesting a peak reduction tone (PRT) configuration for reducing a peak to average power ratio (PAPR). In the following discussion, the term peak reduction tone (PRT) may be used to refer to any tone reservation (TR) technique that can enable a reduction in the PAPR by reserving a frequency resource or transmission of a signal other than a data signal. In an embodiment, the WTRU may receive an indication of frequency resources to be used for transmitting a PRT signal based on the PRT configuration. In an embodiment, the WTRU may transmit the PRT signal in the frequency resources in addition to an uplink (UL) transmission, wherein the frequency resources for the PRT signal may be allocated based on a set of frequency resources allocated to the UL transmission. In an embodiment, a WTRU may receive TR configuration information indicating a set of TR configurations. For example, the WTRU may determine a power headroom (PH) for a first uplink grant. For example, the WTRU may select a first TR configuration from the indicated set of TR configurations based on any of the first uplink grant and the determined PH. For example, the WTRU may transmit first information indicating the selected first TR configuration. For example, the WTRU may receive second information indicating a second TR configuration of the indicated set of TR configurations. For example, the WTRU may receive a second uplink grant and may perform a transmission comprising (1) a data transmission according to the second uplink grant at a first power level and (2) a TR transmission, wherein the TR transmission may be transmitted in frequency resources determined according to the second TR configuration, and wherein the TR transmission may be transmitted at a second power level determined based on the first power level and on a power offset associated with the second TR configuration. Although various embodiments are described and/or claimed herein in which an apparatus, system, device, etc. and/or any element thereof is configured to carry out an operation, process, algorithm, function, etc. and/or any portion thereof, it is to be understood that any embodiments described and/or claimed herein assume that any apparatus, system, device, etc. and/or any element thereof carries out any operation, process, algorithm, function, etc. and/or any portion thereof (and vice versa). BRIEF DESCRIPTION OF THE DRAWINGS A more detailed understanding may be had from the following description, given by way of example in conjunction with the accompanying drawings. Figures in such drawings, like the detailed description, are examples. As such, the Figures and the detailed description are not to be considered limiting, and other equally effective examples are possible and likely. Furthermore, like reference numerals in the figures indicate like elements. FIG. 1A is a system diagram illustrating an example communications system in which one or more disclosed embodiments may be implemented;FIG. 1B is a system diagram illustrating an example wireless transmit/receive unit (WTRU) that may be used within the communications system illustrated in FIG. 1A according to an embodiment;FIG. 1C is a system diagram illustrating an example radio access network (RAN) and an example core network (CN) that may be used within the communications system illustrated in FIG. 1A according to an embodiment;FIG. 1D is a system diagram illustrating a further example RAN and a further example of a CN that may be used within the communications system illustrated in FIG. 1A according to an embodiment;FIG. 2 is a diagram illustrating an example of a peak tone reduction technique;FIG. 3 is a diagram illustrating an example of a method for enabling a tone reservation;FIG. 4 is a diagram illustrating another example of a method for enabling a tone reservation;FIG. 5 is a diagram illustrating an example of the use of the modulated data symbols to generate the PRT symbols; andFIG. 6 is a diagram illustrating another example of a method for enabling a tone reservation. DETAILED DESCRIPTION A detailed description of illustrative embodiments will now be described with reference to the various Figures. Although this description provides a detailed example of possible implementations, it should be noted that the details are intended to be exemplary and in