Packet size and DTN transport service: Evaluation on a DTN Testbed
Packet size and DTN transport service: Evaluation on a DTN Testbed
复制标题
DOI：
10.1109/icumt.2010.5676669
复制
发表时间：
2010-12
期刊：
影响因子：
--
通讯作者：
Nikolaos Bezirgiannidis;V. Tsaoussidis
中科院分区：
文献类型：
--
作者：
Nikolaos Bezirgiannidis;V. Tsaoussidis
我们提出了DTN传输层服务的研究，评估了它在从火星中继卫星到地球的文件传输过程中的性能。这些实验是在DTN试验台上进行的，该试验台是为模拟和评估深空通信而设计和实施的。捆绑协议将应用数据截断成不同大小的捆绑，汇聚层协议使用Licklider传输协议，将捆绑封装成块，并将块分成段。考虑了包大小、LTP块大小和段大小，以便在发送节点的传递时间、开销和内存占用方面实现更好的传输。我们最有趣的结论是，使用小包和LTP块时，内存释放速度更快。我们还得出结论，数据段应该接近底层MTU的最大边界，忽略这些依赖关系，在误码率稳定的信道中文件传输时间几乎不依赖于数据包大小。
We present a study of DTN transport layer service, evaluating its performance during a file transmission from a Mars relay satellite towards Earth. The experiments are being held in a DTN Testbed designed and implemented for emulating and evaluating deep-space communications. Bundle Protocol truncates application data into bundles of different size and Licklider Transmission Protocol is used as the convergence layer protocol, encapsulating bundles into blocks and fragmenting blocks into segments. Bundle size, LTP block size and segment size are under consideration to achieve better transmission in terms of delivery time, overhead and memory occupancy at the sending node. Our most interesting conclusion is that memory is released faster when using small bundles and LTP blocks. We also conclude that segments should be close to the maximum boundary of underlying layer's MTU, and that ignoring these dependencies, file delivery time in a channel of steady bit error rate has little dependence from packet sizes.