Patent ID: 8023898
Filing Date: 2011-09-20
Classification: H04W

Abstract:
1. An interference mitigation method for use in a wireless network having a plurality of nodes grouped into a plurality of clusters, the wireless network having a frequency spectrum divisible into a plurality of sub-channels, the sub-channels capable of being allocated in any desired combination for used in wireless communication by the nodes; the method comprising the steps of: (a) selecting one of the clusters; (b) selecting one of the nodes in the selected cluster; (c) the selected node in the selected cluster finding a required number of sub-channels for its wireless communication; (d) the selected node monitoring the sub-channels to obtain a received interference level representing interference received from the other nodes on each of the sub-channels, and determining at least one combination of sub-channels in said required number based on the received interference level; (e) said selected node obtaining an inflicted interference level representing interference expected to be caused to the other nodes by its use of said combination of sub-channels; (f) said selected node deciding whether or not to adopt for its wireless communication the combination of sub-channels based on the received interference level and the inflicted interference level; (g) if there is another node in the selected cluster which has yet to be selected, returning to step (b) to select another one of the nodes; and (h) if all the nodes in the selected cluster have been selected, returning to step (a) to select another one of the clusters.