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EP-4133833-B1 - METHOD AND APPARATUS FOR PARAMETER SETTING

EP4133833B1EP 4133833 B1EP4133833 B1EP 4133833B1EP-4133833-B1

Inventors

  • ZHOU, WEI
  • ZHANG, QI

Dates

Publication Date
20260506
Application Date
20200408

Claims (7)

  1. A method (510) performed by a network node, comprising: determining (512) whether to trigger bandwidth part configuration for subcarrier spacing switching for a terminal device, according to one or more parameters of the terminal device; and transmitting (514) an indicator to the terminal device to trigger the bandwidth part configuration for the subcarrier spacing switching, in response to determining to trigger the bandwidth part configuration for the terminal device, wherein the determination of whether to trigger the bandwidth part configuration for the subcarrier spacing switching for the terminal device according to the one or more parameters of the terminal device comprises: determining to trigger the bandwidth part configuration for switching from first subcarrier spacing to second subcarrier spacing for the terminal device, in response to that the one or more parameters meet a first criterion, characterized in that the second subcarrier spacing is larger than the first subcarrier spacing, the first criterion indicating that a velocity factor of the terminal device is larger than a first threshold and a multi-path factor of the terminal device is less than a second threshold.
  2. The method according to claim 1, wherein the bandwidth part configuration indicates the terminal device to switch from a first bandwidth part to a second bandwidth part, and wherein the first bandwidth part and the second bandwidth part are configured with different subcarrier spacing.
  3. The method according to claim 1, wherein the first criterion indicates that a difference between weights of a velocity factor and a multi-path factor of the terminal device is within a first range.
  4. The method according to claim 1, wherein the first criterion indicates that a traffic type of the terminal device is associated with a first delay requirement.
  5. A network node (610), comprising: one or more processors (611); and one or more memories (612) storing computer program codes (613), the one or more memories (612) and the computer program codes (613) configured to, with the one or more processors (611), cause the network node (610) at least to: determine whether to trigger bandwidth part configuration for subcarrier spacing switching for a terminal device, according to one or more parameters of the terminal device; and transmit an indicator to the terminal device to trigger the bandwidth part configuration for the subcarrier spacing switching, in response to determining to trigger the bandwidth part configuration for the terminal device, wherein the determination of whether to trigger the bandwidth part configuration for the subcarrier spacing switching for the terminal device according to the one or more parameters of the terminal device comprises: determining to trigger the bandwidth part configuration for switching from first subcarrier spacing to second subcarrier spacing for the terminal device, in response to that the one or more parameters meet a first criterion, characterized in that the second subcarrier spacing is larger than the first subcarrier spacing, the first criterion indicating that a velocity factor of the terminal device is larger than a first threshold and a multi-path factor of the terminal device is less than a second threshold.
  6. A method (520) performed by a terminal device, comprising: receiving (522) an indicator from a network node to trigger bandwidth part configuration for subcarrier spacing switching for the terminal device, wherein the bandwidth part configuration is based at least in part on one or more parameters of the terminal device; and triggering (524) the bandwidth part configuration for the subcarrier spacing switching, in response to the reception of the indicator from the network node, wherein triggering the bandwidth part configuration for the subcarrier spacing switching comprises: performing bandwidth part switching to switch from first subcarrier spacing to second subcarrier spacing, wherein the second subcarrier spacing is larger than the first subcarrier spacing, and the one or more parameters meet a first criterion, characterized in that the first criterion indicates that a velocity factor of the terminal device is larger than a first threshold and a multi-path factor of the terminal device is less than a second threshold.
  7. A terminal device (610), comprising: one or more processors (611); and one or more memories (612) storing computer program codes (613), the one or more memories (612) and the computer program codes (613) configured to, with the one or more processors (611), cause the terminal device (610) at least to: receive an indicator from a network node to trigger bandwidth part configuration for subcarrier spacing switching for the terminal device, wherein the bandwidth part configuration is based at least in part on one or more parameters of the terminal device; and trigger the bandwidth part configuration for the subcarrier spacing switching, in response to the reception of the indicator from the network node, wherein triggering the bandwidth part configuration for the subcarrier spacing switching comprises: performing bandwidth part switching to switch from first subcarrier spacing to second subcarrier spacing, characterized in that the second subcarrier spacing is larger than the first subcarrier spacing, and the one or more parameters meet a first criterion, wherein the first criterion indicates that a velocity factor of the terminal device is larger than a first threshold and a multi-path factor of the terminal device is less than a second threshold.

Description

FIELD OF THE INVENTION The present disclosure generally relates to communication networks, and more specifically, to method and apparatus for parameter setting. BACKGROUND This section introduces aspects that may facilitate a better understanding of the disclosure. Accordingly, the statements of this section are to be read in this light and are not to be understood as admissions about what is in the prior art or what is not in the prior art. Communication service providers and network operators have been continually facing challenges to deliver value and convenience to consumers by, for example, providing compelling network services and performance. With the rapid development of networking and communication technologies, wireless communication networks such as long-term evolution (LTE) and new radio (NR) networks are expected to achieve high traffic capacity and end-user data rate with lower latency. In order to meet dramatically increasing network requirements, one interesting option for communication technique development is to support flexible network configuration with adaptive numerology. The term "numerology" may be used to refer to some parameters related to the radio resources for signal transmissions, such as subcarrier spacing (SCS), the length or duration of a cyclic prefix (CP), the length or duration of an orthogonal frequency division multiplexing (OFDM) symbol, the number of symbols contained in a time slot, the time slot duration, etc. Different numerologies and/or parameter settings may be deployed to achieve potentially network performance gain by flexible radio resource configuration. For example, US2019312635A1 discloses timing parameter management for bandwidth part switching. US2019104543A1 discloses method and apparatus for switching bandwidth part in new radio. WO2019165224A1 discloses system and method for bandwidth part operation. US2013028128A1 discloses system and method for dynamic band scheduling. SUMMARY This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. Comparing to LTE numerology (e.g., SCS, symbol length, etc.), the most outstanding difference in NR numerology is that a NR network may support multiple different types of SCS (e.g., 15kHz, 30kHz, 60kHz, 120kHz, etc.), while in an LTE network there is only one type of SCS (i.e. 15KHz). There may be many advantages of supporting multiple SCS options in the NR network. For example, the numerology with smaller SCS may enable a system to be more tolerable to the effect of multi-path delay spread, and the numerology with larger SCS may make it easier to compensate for the phase noise. However, there is no existing solution for adjusting SCS configuration adaptively according to different channel conditions and network environments. Therefore, it may be desirable to implement adaptive SCS setting in a more efficient way. Various embodiments of the present disclosure propose a solution for adaptive parameter setting, which can enable SCS switching by triggering bandwidth part (BWP) configuration for a terminal device, e.g. user equipment (UE), according to measurement and/or traffic information of the terminal device, so as to increase flexibility of SCS configuration with enhanced resource utilization. The invention is set out in the appended set of claims. BRIEF DESCRIPTION OF THE DRAWINGS The disclosure itself, the preferable mode of use and further objectives are best understood by reference to the following detailed description of the embodiments when read in conjunction with the accompanying drawings, in which: Figs. 1A-1E are diagrams illustrating exemplary use cases of BWPs according to some embodiments of the present disclosure;Figs.2A-2B are diagrams illustrating exemplary information elements according to some embodiments of the present disclosure;Fig.3A is a diagram illustrating an exemplary adaptive parameter setting procedure according to an embodiment of the present disclosure;Fig.3B is a diagram illustrating an exemplary BWP configuration according to an embodiment of the present disclosure;Fig.4A is a diagram illustrating exemplary calculation of a main influence factor according to an embodiment of the present disclosure;Fig.4B is a diagram illustrating exemplary frequency configuration according to an embodiment of the present disclosure;Fig.5A is a flowchart illustrating a method according to some embodiments of the present disclosure;Fig.5B is a flowchart illustrating another method according to some embodiments of the present disclosure;Fig.6A is a block diagram illustrating an apparatus according to some embodiments of the present disclosure;Fig.6B is a block diagram illustrating another apparatus according to some embodiments of the p