Electronics and Telecommunications Research Institute

Beijing University of Posts and Telecommunications

Yuexing Peng

Kan Zheng

Young-il Kim

Wenbo Wang

Jisoo Park

Guangwei Li

The present invention discloses a method for generating a consistent cryptographic key based on wireless channel features. First of all, channel estimated values &#x125;, &#x125;and channel estimate mean square error MSE are obtained through channel estimate, and then quantized channel eigenvectors {tilde over (h)}and {tilde over (h)}are obtained through quantization coding; next, inconsistency between {tilde over (h)}and {tilde over (h)}is equivalent to obtaining {tilde over (h)}at end B through virtual channel noise adding the channel eigenvector {tilde over (h)}sent by end A, and Signal-to-Noise ratio SNR &#x393; of the virtual channel is determined; a proper coding mode ENC is determined according to the virtual channel SNR &#x393;; both communication parties perform corresponding coding and decoding according to ENC and thereby obtain an estimated value {tilde over (&#x125;)}of {tilde over (h)}; finally, a cryptographic key generating function is applied to {tilde over (h)}and {tilde over (&#x125;)}, whereby a cryptographic key Kc is obtained. The present invention increases the validity of consistent dynamic cryptographic key generating and achieves information security and privacy at the physical layer.

Method for generating consistent cryptographic key based on wireless channel features

A power control method performs a scheduling on user terminals and then allows the user terminals to calculate power of interference by neighboring sectors, generates interference information to indicate how much the base stations in neighboring sectors, which interfere with each other, reduce transmission power based on the calculated power of interference, and informs a serving base station thereof. The base stations calculate throughput gain and throughput loss based on the interference information, and determine whether the reduction of the transmission power is performed based on the calculated throughput gain and throughput loss.

Power control method and apparatus for inter-cell interference removal

Growing community of inventors

Beijing, China

Yuexing Peng