US Patent No. 9,198,120

METHOD AND APPARATUS FOR SCANNING MULTIPLE CHANNELS IN A WIRELESS NETWORK


Patent No. 9,198,120
Issue Date November 24, 2015
Title Method And Apparatus For Scanning Multiple Channels In A Wireless Network
Inventorship Yong Liu, Campbell, CA (US)
Raja Banerjea, Sunnyvale, CA (US)
Assignee Marvell World Trade LTD., St. Michael (BB)

Claim of US Patent No. 9,198,120

1. A client station comprising:
a transceiver module configured to transmit and receive data via a frequency band, wherein the frequency band includes a plurality
of channels;

a scanning module configured to
simultaneously scan multiple channels of the frequency band at the same time, and
determine whether one or more access points are available for association in one or more of the multiple channels;
an association module configured to, in response to the scanning module determining that one or more access points are available
for association, determine whether to associate with one of the one or more access points determined to be available for association;

a preamble detection module configured to detect whether a preamble of a frame is received via a first channel of the multiple
channels; and

a decoding module configured to attempt to decode a signal field of the frame in response to the preamble detection module
detecting that the preamble of the frame is received via the first channel of the multiple channels, wherein the signal field
follows the preamble,

wherein the decoding module is configured to stop decoding the signal field in response to the decoding module (i) being unable
to decode the signal field, or (ii) determining, based on the decoding of the signal field, that the frame is neither a beacon
nor a probe response to a probe request; and

wherein the preamble detection module is configured to, in response to the decoding module stopping the decoding of the signal
field, begin detecting whether a second preamble of a second frame is received via a second channel of the multiple channels.