Delay Tolerant Networking (DTN) has been proposed as a new architecture to provide efficient store-carry-and-forward data transport in satellite networks. Since these networks relay on scheduled contact plans, the Contact Graph Routing (CGR) algorithm can be used to optimize routing and data delivery performance. However, in spite of the various improvements that have been made to CGR, there have been no significant proposals to prioritize traffic with different quality of service requirements. In this work we propose adaptations to CGR that allow performance improvements when sending traffic with different latency constraints, and develop a linear programming optimization model that works as a performance upper bound. The simulation results of the proposed schemes are promising and open the debate on other ways to improve performance while meeting the particular needs of heterogeneous traffic.

翻译：由于这些网络在预定的联络计划中进行中继,可使用联系图路程算法优化路由和数据交付性能,然而,尽管对联络组作了各种改进,但并未提出重要建议,将服务要求质量不同的交通列为优先事项。在这项工作中,我们建议对联络组进行调整,以便在发送有不同延缓度限制的交通时改进性能,并开发一个作为性能最高约束的线性编程优化模型。拟议计划的模拟结果很有希望,并开启了有关其他改进性能方法的辩论,同时满足各种交通的特殊需要。