US 11,855,818 B1
Adaptive orthogonal frequency division multiplexing (OFDM) numerology in a wireless communication network
Yakun Sun, Sunnyvale, CA (US); Hongyuan Zhang, Fremont, CA (US); Mingguang Xu, San Jose, CA (US); and Hui-Ling Lou, Sunnyvale, CA (US)
Assigned to Marvell Asia Pte Ltd, Singapore (SG)
Filed by Marvell Asia Pte Ltd, Singapore (SG)
Filed on Apr. 30, 2015, as Appl. No. 14/701,208.
Claims priority of provisional application 61/986,726, filed on Apr. 30, 2014.
Int. Cl. H04L 27/26 (2006.01); H04L 5/00 (2006.01); H04W 84/12 (2009.01)
CPC H04L 27/2605 (2013.01) [H04L 5/0007 (2013.01); H04W 84/12 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method for adapting an orthogonal frequency division multiplexing (OFDM) numerology configuration for use in a communication network, wherein the OFDM numerology configuration corresponds to a plurality of OFDM parameters including a guard interval duration for OFDM symbols transmitted in the communication network, the method comprising:
adaptively selecting, at a first communication device, one or more OFDM numerology configurations to be used in communication with one or more second communication devices to improve one or both of (i) throughput and (ii) signal quality in the communication network, including adaptively selecting, (i) a guard interval duration and (ii) a starting location of an OFDM symbol utilizing the selected guard interval duration within a physical layer (PHY) data unit to be generated to improve one or both of (i) throughput and (ii) signal quality in the communication network, wherein the selected starting location of the OFDM symbol is selected from a plurality of starting locations within the PHY data unit to be generated, wherein the plurality of starting locations includes i) a first starting location that begins multiple OFDM symbols after a beginning OFDM symbol of the PHY data unit, and ii) a second starting location that begins multiple OFDM symbols after the beginning OFDM symbol of the PHY data unit, the second starting location different than the first starting location, and wherein:
in response to selecting either the first starting location or the second starting location, multiple first OFDM symbols of a non-legacy portion of the PHY data unit that are located after the selected starting location utilize the selected guard interval duration, the multiple first OFDM symbols including OFDM symbols within a data portion of the PHY data unit, multiple second OFDM symbols of a legacy portion of the PHY data unit that are located before the selected starting location utilize a different guard interval duration that is shorter than the selected guard interval duration, and multiple third OFDM symbols of the non-legacy portion of the PHY data unit that are located before the selected starting location utilize the different guard interval duration that is shorter than the selected guard interval duration;
generating, at the first communication device, the PHY data unit to be transmitted to a second communication device of the one or more second communication devices, including using one of the one or more adaptively selected OFDM numerology configurations to generate OFDM symbols of at least a portion of the PHY data unit; and
transmitting, with the first communication device, the generated PHY data unit.