Patent ID: 8014337
Filing Date: 2011-09-06
Classification: H04W,Y02D

Abstract:
1. A wireless multi-hopping communication system comprising: an access point; a source node in communication with the access point, and configured to transmit data on at least one of a plurality of frequencies, the source node operating under at least one operating condition defining a target diversity level, the target diversity level being a minimum number of uncorrelated nodes that are needed for achieving a target probability of primary user detection with a specified false alarm level; a plurality of nodes in communication with the access point and the source node, and configured to transmit the data on at least one of the plurality of frequencies on a secondary basis, wherein the source node and the plurality of nodes are adapted to determine a routing path from the source node to the access point utilizing at least one intermediate node of the plurality of nodes and a transmitting frequency of the plurality of frequencies while reducing interference to a primary user of the transmitting frequency; and the at least one intermediate node used in the routing path being selected based on a ranking of the plurality of nodes, the ranking being determined as a weighted function of a distance between the source node and the access point, a transmit power needed to transmit the signal from the source node to an intermediate node of the plurality of nodes, and a sensing reliability of the intermediate node, the highest ranking node being used as the intermediate node to route the communication from the source node to the access point.