US Patent No. 9,717,086


Patent No. 9,717,086
Issue Date July 25, 2017
Title Orthogonal Frequency Division Multiple Access For Wireless Local Area Network
Inventorship Hongyuan Zhang, Fremont, CA (US)
Yakun Sun, Sunnyvale, CA (US)
Hui-Ling Lou, Sunnyvale, CA (US)
Liwen Chu, San Ramon, CA (US)
Assignee Marvell World Trade Ltd., St. Michael (BB)

Claim of US Patent No. 9,717,086

1. A method, comprising:
assigning a plurality of different orthogonal frequency division multiplex (OFDM) tone blocks for a wireless local area network
(WLAN) communication channel to a plurality of devices including a first device and second device, wherein

the plurality of different OFDM tone blocks includes at least a first OFDM tone block assigned to the first device and a second
OFDM tone block assigned to the second device, and

the first OFDM tone block and the second OFDM tone block together span a bandwidth equal to a smallest channel bandwidth of
a legacy WLAN communication protocol; and

generating an orthogonal frequency division multiple access (OFDMA) data unit for the WLAN communication channel, the OFDMA
unit including a preamble portion and a data portion, the preamble portion having i) at least a legacy portion that spans
the entire WLAN communication channel, ii) a first non-legacy portion that spans the first OFDM tone block, and iii) a second
non-legacy portion that spans the second OFDM tone block.