Patent ID: 7881277
Filing Date: 2011-02-01
Classification: H04W

Abstract:
1. A communication method of a distributed network system where cognitive radio (CR) technology is used, the communication method comprising: transmitting a request-to-send (RTS) message from a source node to a destination node, the RTS message being heard by at least one first neighbor node positioned adjacent to the source node; transmitting first adjacent channel information from the at least one first neighbor node to the source node via a pulse signal as a response to the heard RTS message; transmitting, from at least one second neighbor node positioned adjacent to the destination node, second adjacent channel information to the destination node using a pulse signal as a response to a request of the destination node; and exchanging data between the source node and the destination node, the data being exchanged over a channel that is selected by the destination node, according to the first and/or second adjacent channel information, as being available for the exchanging of data.