Abstract

The content-centric networking depends on a forwarding information base (FIB) to forward Interest towards providers and utilizes reverse paths in a pending Interest table (PIT) to send Data back to consumers. If consumers change their locations, reverse paths may disrupt and consequently content-centric communications fail. If providers change their locations, each relevant content router (CR) has to update FIB. This may lead to content-centric communication disruption and FIB pollution. Taking these issues into account, we propose a provider and consumer mobility support scheme and aim to improve the Interest and Data delivery rates. The proposed provider handover algorithm supports the provider mobility by updating FIB in a unicast way. Since only the previous CR and serving CR are involved in updating FIB, the handover is achieved without FIB pollution. As a result, the provider handover cost and latency are reduced and the Interest delivery rate is improved. The proposed consumer handover algorithm supports the consumer mobility by updating PIT in a unicast way. Based on the updated PIT, Data can be sent back to consumers even if they change their locations. Since consumers retrieve Data via one communication process, the Data delivery rate is improved and the retransmission of Interest is avoided. Compared with the existing solution, this scheme reduces the handover cost and latency by nearly 72% and 51% respectively, and increases the delivery rate by nearly 11.5%.

中文翻译：

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以内容为中心的网络中的移动性管理

摘要

以内容为中心的联网依靠转发信息库（FIB）将兴趣转发给提供商，并利用未决兴趣表（PIT）中的反向路径将数据发送回消费者。如果消费者改变位置，反向路径可能会中断，因此以内容为中心的通信将失败。如果提供商更改其位置，则每个相关的内容路由器（CR）必须更新FIB。这可能会导致以内容为中心的通信中断和FIB污染。考虑到这些问题，我们提出了提供商和消费者流动性支持计划，旨在改善兴趣和数据交付率。所提出的提供商切换算法通过以单播方式更新FIB来支持提供商移动性。由于仅先前的CR和服务CR都参与了FIB的更新，因此可以实现无FIB污染的切换。结果，减少了提供商的切换成本和等待时间，并且提高了兴趣传递速率。所提出的消费者切换算法通过以单播方式更新PIT来支持消费者移动性。基于更新的PIT，即使消费者更改了位置，也可以将数据发送回消费者。由于消费者通过一种通信过程检索数据，因此提高了数据传输率并重新传输了兴趣避免。与现有解决方案相比，该方案将切换成本和等待时间分别降低了近72％和51％，交付率提高了近11.5％。