RESEARCH ON CROSS-LAYER RESOURCE MANAGEMENT SCHEME IN COGNITIVE RADIO SYSTEM

Three new cross-layer resource manage schemes are proposed in this paper, which are from the aspects of decreasing the number of subcarriers allocated to primary users, increasing the probability that one subcarrier is shared between a primary user and a secondary user, as well as, effective tradeoff between the above two schemes through the design of utility function. Simulation results show that proposed three schemes can satisfy users' QoS requirements of different aspects, and achieve effective tradeoff among several QoS requirements.