Description:RELATED APPLICATION
[0001] The present application claims priority to U.S. Non-Provisional Patent Application No. 18/358,179 filed on 25 July 2023 and titled “USE OF CUSTOMIZED FREQUENCY ROTATION FOR PUNCTURED CHANNELS” the entire disclosure of which is hereby incorporated by reference.
TECHNICAL FIELD
[0002] Aspects described herein generally relate to techniques for utilizing customized frequency rotation for punctured channels and, in particular, to the selection of frequency rotation per channel configuration as a function of Peak to Average Power Ratio (PAPR).
BACKGROUND
[0003] WiFi protocols utilize configurable channels depending upon current network demands and the particular application. For instance, WiFi 6 (IEEE 802.11ax, finalized on September 1, 2020) may have a channel bandwidth of 20 MHz, 40 MHz, 80 MHz, or 160 MHz. WiFi 7 (IEEE 802.be, with the initial draft being submitted in March of 2021) may also utilize these channel bandwidths, as well as an increased channel bandwidth of 320 MHz. For both WiFi 6 and WiFi 7, when 80 MHz, 160, MHZ, or 320 MHz channels are used, the wireless channel may comprise a number of sub-channels, which may comprise primary and secondary channels of at least 20 MHz, as well as additional sub-channels that may be split or combined according to detected network needs.
[0004] Conventional WiFi protocols require that data transmissions be achieved through the continuous use of the primary and secondary sub-channels. Thus, if interference was present in any portion of the primary or secondary sub-channels, then the entire network would be limited to the use of the primary sub-channel. Thus, preamble puncturing is implemented introduced by WiFi 7 (802.11be) to improve spectral efficiency by allowing a Wi-Fi 7 access point (AP) to transmit a “punctured” (i.e. non-continuous) portion of the spectrum channel if some of the channel is being used by legacy users. Specifically, WiFi 7 allows for 80 MHz, 160 MHz, or 320 MHz channels to notch a 20 MHz portion of its operating bandwidth when interference is detected (e.g. radar) within that 20 MHz slice of spectrum. WiFi 7 further improves upon this concept with multi-resource unit (RU) puncturing, which enables the use of multiple resource units and puncturing to avoid the congestion caused by interference and to maintain high transmission speeds.
[0005] However, although the current WiFi 7 standard allow for channel puncturing, this is realized by using the same frequency rotation values for each channel configuration and bandwidth (e.g. for 80 MHz, 160 MHz, and 320 MHz channels) by simply repeating the 80 MHz frequency rotation values for the remainder of the other 20 MHz sub-channels. As a result, the Peak to Average Power Ratio (PAPR) may increase for some puncturing combinations. Therefore, current WiFi standards are inadequate, and there is a need to improve upon the frequency rotation values that are specified in the standards to improve upon PAPR performance for different channel puncturing combinations.
BRIEF DESCRIPTION OF THE DRAWINGS/FIGURES
[0006] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate the aspects of the present disclosure and, together with the description, and further serve to explain the principles of the aspects and to enable a person skilled in the pertinent art to make and use the aspects.
[0007] FIG. 1 illustrates a wireless network, in accordance with the present disclosure;
[0008] FIG. 2 illustrates conventional channel puncturing;
[0009] FIG. 3A illustrates a plot of PAPR values versus different punctured 20 MHz sub-channels within a 160 MHz channel, in accordance with the disclosure.;
[0010] FIG. 3B illustrates a plot of PAPR values versus different frequency rotation combinations for a 160 MHz channel with puncturing in the first sub-channel index, in accordance with the disclosure;
[0011] FIG. 4A illustrates a plot of PAPR values versus different 40 MHz sub-channel puncturing within a 320 MHz channel, in accordance with the disclosure;
[0012] FIG. 4B illustrates a plot of PAPR values versus different frequency rotation combinations for a 320 MHz channel with 40 MHz sub-channel puncturing realized via puncturing in the first two 20 MHz channels, in accordance with the disclosure;
[0013] FIG. 5 illustrates a device, in accordance with the disclosure; and
[0014] FIG. 6 illustrates a process flow, in accordance with the disclosure.
[0015] The exemplary aspects of the present disclosure will be described with reference to the accompanying drawings. The drawing in which an element first appears is typically indicated by the leftmost digit(s) in the corresponding reference number.
DETAILED DESCRIPTION
[0016] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the aspects of the present disclosure. However, it will be apparent to those skilled in the art that the aspects, including structures, systems, and methods, may be practiced without these specific details. The description and representation herein are the common means used by those experienced or skilled in the art to most effectively convey the substance of their work to others skilled in the art. In other instances, well-known methods, procedures, components, and circuitry have not been described in detail to avoid unnecessarily obscuring aspects of the disclosure.
, C , Claims:1. An access point (AP), comprising:
processing circuitry configured to:
determine, from among a plurality of channel configurations, a channel configuration of a wireless channel,
wherein each one of the plurality of channel configurations identifies a plurality of sub-channels within the wireless channel in accordance with a communication protocol, with one of the plurality of sub-channels being punctured at a spectral location within the wireless channel;
apply, for the determined channel configuration, frequency rotation values to the plurality of sub-channels within the wireless channel,
wherein the frequency rotation values are selected from among a set of frequency rotation values, with each of the frequency rotation values from among the set of frequency rotation values being different from one another and corresponding to each respective one of the plurality of channel configurations; and
a transmitter configured to transmit data via the wireless channel using the determined channel configuration in accordance with the application of the selected frequency rotation values to the respective sub-channels within the wireless channel.