Research Of On-board Optical Burst Switching Assembly Algorithm And Resource Reservation Algorithm

With the concept of the Global Energy Interconnection put forward,the communication technology of the north pole, the equator and the whole world becomes one of the hotspots in recent research. Due to the spatial location advantage, the satellite plays a key role in the whole world communication. Nowadays, there is no satellite communication system in our country that could real-time cover the whole arctic for the whole day,the communication capacity of the arctic is very poor, therefore, it is extremely necessary to establish the arctic satellite communication system.Almost all the traditional satellite systems are using transparent forwarding way, the transmission delay is very big, however, on-board switching technology can reduce the dependence of terrestrial equipment, reduce the transmission delay and enhance the robustness of the network. Compared to the electrical switching, the optical switching has the advantages of large communication capacity, low power consumption small size and light weight, so it becomes a major development in the future space network.On the basis of researching the current arctic satellite communication constellation, a satellite communication constellation that can real-time cover the arctic, the equator and the whole world is designed in this paper.Focus on the on-board optical switching, the article mainly researches the assembly algorithm and resource reservation algorithm of on-board optical burst switching, then proposes an on-board optical burst switching weight-weighted round robin assembly algorithm based on the QoS guarantee and an on-board optical burst switching resource reservation based on macro-burst and dynamic cache.The major research work of the article are as follows:1) In order to match the target of the arctic satellite constellation design, on the basis of researching the current satellite constellation and analyzing the way of satellite constellation design, a three-tiered satellite constellation based on GEO, LEO and HEO is proposed in this paper, and designs the orbit height, inclination and period for this constellation. The simulation results show that the proposed satellite constellation can cover the whole world, the arctic and the equator in real time, and it is better than Iridium constellation in coverage rate and real-time coverage satellite number.2) In order to solve the problem of the QoS guarantee, on the basis of researching the current on-board optical burst switching assembly algorithm, an on-board optical burst switching weight-weighted round robin assembly algorithm based on the QoS guarantee is proposed in this paper. The simulation results show that the proposed algorithm can improve the transmission quality of high priority IP packet and guarantee the transmission of lower level IP packet at the same time, the transmission ability is better than the algorithm MSMAP and FZTFR.3) In order to solve the poor performance of the optical burst switching resource reservation policy in terms of the time delay and packet loss rate, on the basis of researching the current on-board resource reservation algorithm, an on-board optical burst switching resource reservation algorithm based on macro-burst and dynamic cache is proposed in this paper, the algorithm adopts the concept of macro-burst in the edge node, and uses the dynamic cache to realize second reservation in the core node. The simulation shows that the proposed algorithm is better than the resource reservation algorithm JET, LAUC and LAUC-VF, the time delay and packet loss rate are both 10% lower.