空间信息网络资源预留允许控制的方法

摘要

针对空间信息网络动态变化、业务种类繁多及资源异质异构的特性，采用提前预留资源的策略，对时延抖动敏感、传输带宽要求较大和业务流持续时间较长等高QoS要求业务进行提前资源预留，并通过预留申请消息将传输业务特性传递给卫星，卫星通过采用允许控制的方法，准确评估所需要的资源，合理分配网络可用资源。文中给出基于简化空间信息网络传输场景的资源预留允许控制传输流程，考虑到空间信息网络资源受限，需充分考虑允许控制算法复杂度与增益的平衡，针对3种允许控制算法进行仿真，比较了3种允许控制算法性能。通过文中提出的方法可有效保证网络中高QoS要求业务的服务质量，提高空间信息网络资源利用率。%According to the space information network characteristics of dynamic change,Various business types and in-formation heterogeneous,a method of resource reservation has been adopted by reserving the service resources to ensure the high-QoS of some services,including delay jitter sensitive services,larger transmission bandwidth services and longer services flow duration and so on.And the service characteristics have been sent to the satellite by resource reservation applications, which have been used to estimate the accurate resources and reasonably allocate available network resources for satellite transmission by allow control algorithms.The resource reservation allow control of transport processes has been given based on a simplified transmission scenario of space information network.In consideration of limited network resources,the allow con-trol algorithms have to make a tradeoff between the complexity and the gain of algorithms.Finally,the allow control algorithms have been simulated through simulation software,which have been compared through algorithms gains,computational com-plexity,and required parameters.The method proposed in this paper can effectively guarantee the service quality of high-QoS services,and improve the utilization of space information network resources.