Patent ID: 9509466
Filing Date: 2016-11-29
CPC Classification: H04L,H04W

Claim Text:
1. A network station, comprising: a processor; and, a transceiver that sends and receives wireless communications, wherein the transceiver is arranged to communicate with a second network station on a sub-channel with a center frequency, the sub-channel being a sub-channel of a first Institute of Electrical and Electronics Engineers (IEEE) 802.11 channel from a plurality of IEEE 802.11 channels, the first channel having a central frequency, the sub-channel overlapping the first channel, the center frequency of the sub-channel being offset sufficiently from the center frequency of the first channel so that the network station and the second network station do not lock onto packets transmitted from a third network station transmitting in the first channel; wherein the center frequency of the sub-channel is closer in frequency to the center frequency of the first channel than to a center frequency of any other channel in the plurality of channels; wherein the network station is an access point in a first local area wireless network and the third network station is a second access point in a second local area wireless network; wherein the transceiver being arranged to send out a beacon signal with a center frequency at the center frequency of the first channel, so that when the second access point sends out a beacon signal with a center frequency at the center frequency of the first channel, the beacon signal sent out by the transceiver is completely within a bandwidth of the first channel and within a bandwidth of the sub-channel and the beacon signal sent out by the second access point is completely within the bandwidth of the first channel and within the bandwidth of the sub-channel; wherein the beacon signal sent out by the transceiver includes a training sequence in a preamble that indicates the beacon signal sent out by the first access point has a smaller bandwidth than other transmissions from the first access point.