DCMA: A Differentiated Content Mobility Support Approach in named data networking

In order to provide seamless mobility support for differentiated content in mobile NDN (Named Data Networking) environment, we propose a differentiated content mobility support approach, dubbed DCMA. Firstly, we induce a route-able ID (IDentity) that is structurally similar to the content name, and add an Optional field to the original NDN packet. Then, DCMA can both increase the addressing efficiency of INTEREST packet, and maintain the routing scalability of NDN. Besides, we extend the basic functionalities of the NARs (NDN Access Routers), group the content into three classes, and further set differentiated forwarding priority level for differentiated content. After that, DCMA can both resolve the Source mobility problem effectively, and provide differentiated handoff experience level for differentiated content. Moreover, we compare the handoff performance of DCMA and other Source mobility support approaches via simulation investigation. Relevant results indicate that, DCMA can provide lower handoff cost, as well as shorter handoff latency during the handoff process of the Source.