The performance of system handover scheme with permission probability control

Software defined radio (SDR) terminals have the ability of communicating via several mobile systems by reconfiguring their functions. Each mobile system is requested to support a handover from/to other mobile systems in order to allow SDR terminals to communicate dynamically with several mobile systems. The paper discusses system handover between random access type mobile communication systems, which can provide connection-less services. Then, a system handover employing transmission permission probability control is proposed. The proposed scheme controls packet transmissions from the mobile terminals which are connected to the alternative system using transmission permission probability. The permission probability is controlled according to the channel load which is estimated by statistically analyzing the number of transmissions included in each received packet. Simulation results show that the proposed scheme improves the performance of each mobile system.