Patent ID: 8873526

Claim:
A method, comprising: listening, on a first frequency at a wireless transmission node in a wireless network, for a wireless carrier sense detected alert (CSDA) signal that requests that receiving nodes refrain from transmitting wireless signals on a second distinct frequency for a particular duration; in response to receiving the CSDA signal, refraining from transmitting a wireless signal on the second frequency for the particular duration; in response to not receiving the CSDA signal, allowing transmission of a wireless signal on the second frequency; in response to allowing transmission, transmitting the wireless signal from the wireless transmission node to a particular node on the second frequency; receiving a CSDA signal at the wireless transmission node from the particular node on the first frequency; determining that the CSDA signal is in response to the transmitted wireless signal from the wireless transmission node; and in response to determining that the CSDA signal is in response to the transmitted wireless signal, continuing to transmit the wireless signal from the wireless transmission node to the particular node.