基于跨层包大小优化的DTN节点存储资源管理机制

A storage management scheme based on cross-layer packet size optimization in DTN

在延迟容忍网络中,应用数据的成功交付依赖于节点存储器的保管.提高节点存储资源利用率有助于减轻网络拥塞,增加网络容量.DTN各层协议数据单元大小影响节点存储资源使用效率,提出一种基于跨层包大小优化的节点存储资源管理机制OSUS.OSUS可根据当前信道状况自适应调节Bundle大小和传输层帧大小,最大化节点存储资源利用率.实验仿真表明,相比于传统不采用自适应机制的方案,OSUS可以提升平均15%的节点存储资源利用率.

Delivery of the application data in delay tolerant network relies on the custody transfer provided by the node storage. Fast release of the occupied node storage is significant for reducing congestion and enhancing network capacity. Studies have shown that the storage efficiency is affected by the size of packet at various network layers. We propose a storage management scheme based on cross-layer packet size optimization, OSUS. OSUS can dynamically adjust Bundle size and the transport layer frame size to maximize the node storage utilization. Simulation results show that, compared with traditional schemes where joint optimization algorithms are not adopted, OSUS can bring 15% improvement on average in the node storage utilization.