SPECTRUM-EFFICIENT SECONDARY USERS GROUPING METHOD FOR TWO-TIER COGNITIVE RADIO NETWORKS

摘要

The spectrum-efficient secondary users grouping method for two-tier cognitive radio groups femtocell base stations (FBSs) and macrocell secondary users (MSUs) into non-interfering groups based on their GPS location information, and then serves the FBSs/MSUs within each group using the same channel. A first approach for grouping the secondary users (SUs) is distance-based. A second approach utilizes profit maximization. Both approaches are extended to a co-channel deployment scenario where the FBSs can share part of the channels purchased for the MSUs to further reduce the number of channels to be purchased from the PU networks. The distance-based grouping method finds the minimum number of groups such that the desired quality of service (QoS) determined by an outage probability threshold is maintained. The profit maximization method tries to find the set of SUs that maximizes the expected total profit of the SU network.

主权项

1. A spectrum-efficient secondary users grouping method for two-tier cognitive radio networks, comprising the steps of:
grouping femtocell base stations (FBSs) and macrocell secondary users (MSUs) into non-interfering groups based on their location information, the grouping being performed by a cognitive base station (CBS); and serving the FBSs/MSUs within each of the groups using a common channel, the common channel being purchased by the CBS.