Patent ID: 8976962
Filing Date: 2015-03-10
Classification: H04L,H04W,Y04S

Abstract:
1. An apparatus for generating a group key using a status of a wireless channel, comprising: at least one hardware processor; a representative channel response selection unit loaded on the at least one hardware processor for selecting a representative channel response signal from among pilot signals received from slave terminals included in a wireless network group; a key generation unit loaded on the at least one hardware processor for generating a group key based on a representative channel response value of the representative channel response signal selected by the representative channel response selection unit; a hash value generation unit loaded on the at least one hardware processor for generating a hash value corresponding to the group key generated by the key generation unit by applying the group key to a hash algorithm; a transmission pilot control unit loaded on the at least one hardware processor for adjusting power intensities of transmission pilots of the respective slave terminals using the channel response value of the representative channel response signal and channel response values and transmission power intensities of the respective slave terminals; and a communication unit loaded on the at least one hardware processor individually connected to the slave terminals and configured to transmit pilot signals, power intensities of which have been adjusted by the transmission pilot control unit, and the hash value to the respective slave terminals, wherein the representative channel response selection unit selects a pilot signal, a transmission power intensity of which is equal to or less than a preset maximum transmission intensity, as the representative channel response signal, and wherein the slave terminals includes a memory for storing the received pilot signals, the received power intensities, and the received hash value.