An LBMRE-OLSR Routing Algorithm under the Emergency Scenarios in the Space-Air-Ground Integrated Networks

The Space-Air-Ground integrated network (SAGIN) is the development trend of the future communication networks, and it can cope with various complex environments and tasks in the future communication environment. When sudden public events and natural disasters occurs, ground communication facilities may be damaged and cannot meet the communication needs in emergency scenarios. The Space-Air-Ground integrated three-dimensional and heterogeneous network enables flexible deployment and rapid networking. In this paper, we study the routing algorithm in a software defined SAGIN to optimize the load balancing in the communication network. First, considering the characteristics of dynamic topology changes in real time, we propose a new Software Defined Network (SDN) model for the SAGIN, which promotes a high network flexibility. Basing on such model, we present a new load balancing dynamic routing algorithm, namely Load Balancing Algorithm Based on Multi-dimensional Resources and Energy (LBMRE-OLSR). The multi-dimensional resources and energy consumption are considered in the new routing algorithm. The simulation experiments show that the proposed algorithm efficiently reduce end-to-end delays and packet loss rate.