A Multi-QoS Optimization Routing for LEO/MEO Satellite IP Networks

with proportion of multimedia services in the IP satellite network growing, how to provide these services with effective guarantee of QoS metrics such as delay, bandwidth, delay and jitter is a crucial issue in IP satellite networks. Based on LEO/MEO network model, this paper proposed an algorithm of QoS cost collection and calculation separation which simplifyies routing calculations and reduces the convergence time of route calculation, analyzed routing recalculation strategy under the circumstances of timeslot switching, satellite failures and link congestion, and aiming at route recalculation strategy in different situations put forward optimization schemes such as jitter optimization algorithm and prior transmission of the backbone network algorithm. Simulation results show that optimization schemes can take QoS guarantee requirements into account, balance QoS indicators like delay, delay jitter, bandwidth so as to better meet the demand of QoS route in case of the asymmetric flow.