TCP Convergence Layer-Based Operation of DTN for Long-Delay Cislunar Communications
TCP Convergence Layer-Based Operation of DTN for Long-Delay Cislunar Communications
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DOI：
10.1109/jsyst.2010.2052297
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发表时间：
2010-06
影响因子：
4.4
通讯作者：
Ruhai Wang;Xuan Wu;Tiaotiao Wang;Xueguan Liu;Liulei Zhou
中科院分区：
文献类型：
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作者：
Ruhai Wang;Xuan Wu;Tiaotiao Wang;Xueguan Liu;Liulei Zhou
延迟/中断容忍网络 (DTN) 是一类为适应长链路延迟和频繁链路中断而开发的网络技术。当 DTN 协议应用于星际互联网 (IPN) 时，评估其有效性和性能的工作还很少。在本文中，我们对用于长延迟地月通信的 DTN-2（即 TCPCL/TCP）基于传输控制协议汇聚层（TCPCL）的操作进行了实验评估，部分与基于 Licklider 传输协议（LTP）的 LTP/用户数据报协议（UDP）进行了比较。该实验是通过在基于 PC 的模拟测试台上使用 DTN 协议栈传输文本文件来进行的。根据实验结果，基于TCPCL的DTN协议在不易出错、时延短的地月链路上有效工作，并且比基于LTP的DTN具有性能优势。随着链路时延和信道噪声的增加，基于TCPCL的DTN的性能远远落后于基于LTP的DTN。基于 TCPCL 的 DTN 协议可以成功处理实验中 30 s-120 s 左右的短链路中断，即使存在很长的链路延迟和高信道误码率 (BER)，但其性能与基于 LTP 的 DTN 相比较差。
Delay/disruption tolerant networking (DTN) is a class of network techniques developed to accommodate long link delay and frequent link disruptions. Little work has been done in evaluating the effectiveness and performance of the DTN protocols when they are applied for an interplanetary Internet (IPN). In this paper, we present an experimental evaluation of Transmission Control Protocol Convergence Layer (TCPCL)-based operation of DTN-2 (i.e., TCPCL/TCP) for long-delay cislunar communications, partially in comparison with Licklider Transmission Protocol (LTP)-based LTP/User Datagram Protocol (UDP). The experiment is conducted by transmitting a text file using the DTN protocol stack over a PC-based simulation test-bed. According to the experimental results, the TCPCL-based DTN protocol works effectively over less error-prone cislunar links with short delay and has performance advantage over LTP-based DTN. Along with the increase in link delay and channel noise, the performance of TCPCL-based DTN is getting far behind the LTP-based DTN. The TCPCL-based DTN protocol can successfully handle an experimented short link disruption around 30 s-120 s, even with an existence of a very long link delay and a high channel Bit-Error-Rate (BER), but its performance is poor compared to that of the LTP-based DTN.