光网格计算环境下基于抢占的多优先级提前资源预留机制

提前资源预留是光网格计算中一种重要的资源占用形式，能较好地保障资源的协同服务需求和网格应用的服务质量。通过研究光网络中动态路由和波长分配问题，提出了一种基于抢占的多优先级波长资源预留算法。仿真结果表明该算法保证了高优先级业务下能够兼顾网络全局资源分配，可以在一定程度上减少资源碎片，提高资源利用率，性能明显优于传统的RWA算法。

Multi-priority advanced resources reservation scheme based on preemption for lambda-grids

Advanced reservation is an important resource reservation mechanism in lambda grids. It can guarantee the grid resources coordination service as well as the quality of service. Through the research of dynamic route and wavelength allocation in WDM network for lambda grids, a preemptable multi-priority wavelength resource reservation algorithm is proposed. Simulation result indicates that this algorithm guarantees high priority services and takes account of the whole network resource allocation, and moreover, it can reduce resource fragmentation and raise resource utilization to some extent, which is much better than conventional RWA algorithms.