Research of on-board optical burst switching weight-weighted round robin assembly algorithm based on the QoS guarantee

In order to solve the problem of on-board optical burst switching assembly algorithm cannot realize completely QoS guarantee, an on-board optical burst switching weight-weighted round robin assembly algorithm based on the QoS guarantee(QWRRA) is proposed in this paper. In this assembly algorithm, IP packet will be inserted in different queue according to the different destination and QoS level when arrive at edge node LEO, the assemble scheduler removes the IP packet from the queue according to the weight-weighted round robin mechanism and assembles the IP packet. When the assemble scheduler generates a burst data packet, it will detect the length of each queue, and change the weights of the queue. Simulation studies the transmission delay and throughput performance of the algorithm, then compared with the assembly algorithm based on mixed threshold and round-robin scheme(FZTFR) and assembly algorithm based on maximum length and maximum time(MSMAP). The results show that the proposed algorithm improves the transmission quality of high priority IP packet and guarantees the transmission of lower level IP packet at the same time.