Basic Simulation Result of Inter System Handover for Cognitive Radio

Cognitive radio system consists of multiple wireless accesses that cover overlapping area, and cognitive terminals that use one or more of the wireless accesses simultaneously. We had proposed the architecture of the cognitive radio system, the inter-system handover protocols and packet format designed to achieve fast handover among the radio systems. Based on the proposed architecture, we have developed a simulator that supports EVDO, WiMAX and wireless LAN, and we have simulated the inter system handover where one cognitive base station covered. Through the simulation, we have proved that the system changes with following the movement of cognitive terminal and that the transmission data can be delivered continuously regardless the system handover.