Research On Spaceborne Parallel Storage Unit Based On Scheduling Algorithm

With the increasing scales of satellites' payloads and data transmission,the requirements of the storage capacity,storage rate and the real-time rapid processing and locating become higher and higher.How to flexibly store and intelligently retrieve multi-channel high-capacity payload data makes it particularly important for satellites to transmit the most valuable information under the restriction of limited bandwidth.Based on the deficiencies of the flexibility,fairness and parallel storage in multi-path payload data processing,this paper presents an on-board parallel storage architecture which is based on scheduling algorithms.The scheduling algorithms break through the key technologies such as the priority of static and dynamic,adaptive framing,multi-channel free scheduling,and 2D routing table annotation,and adopts the design of 5-tuple modeling to shorten the mean waiting time of multi-channel payload data receiving service,which improves the fairness of scheduling algorithms.The paper analyzes the scheduling algorithms throughs mathematical expectation to realize the feasibility of 100% throughput rate which has met the requirements of the stability algorithms.The storage controlling adopts parallel storage technology and 2D routing table annotation to realize the high speed storage of multi-payload and multi-link data.The storage capacity has been more than 2Tbits and the storage speed has been more than 2Gbps.The route scheduling module can support multi-link processing function and realize the throughput rate more than 20 Gbps.At the same time it can realize the elimination and replacement of bad blocks according to the 2D routing table technique.As the functional verification and system testing,it is shown that the on-board parallel storage architecture based on scheduling algorithm proposed in this paper can achieve high-speed transmission,exchange and processing of data such as inter-satellite links,phased arrays,and multi-target identification.It has certain applications in these fields.