Patent ID: 8218673
Filing Date: 2012-07-10
Classification: H04B

Abstract:
1. A method for providing a dual-channel beacon signal to protect a low-power device in a wireless network, the method comprising: generating a beacon message in a first logical channel, the beacon message comprising information associated with the low-power device; generating a detection signal in a second logical channel; mapping a first portion of the first logical channel into a first physical channel and a second portion of the first logical channel into a second physical channel, the second physical channel orthogonal to the first physical channel; mapping a first portion of the second logical channel into the first physical channel and a second portion of the second logical channel into the second physical channel; encoding and modulating data in the first physical channel to generate a first modulated signal; modulating data in the second physical channel to generate a second modulated signal; summing the first and second modulated signals to generate a combined signal; spreading the combined signal to generate the dual-channel beacon signal; and transmitting the dual-channel beacon signal in the first physical channel and the second physical channel.