基于网络终端支持的NDN移动性管理机制

命名数据网（named data networking，NDN）作为一种新型的互联网架构，旨在应对日益增长的数据流量。基于其消费者驱动的内容检索模型，NDN自然地支持消费者移动性。然而生产者移动性仍然是一个具有挑战性的问题，需要额外的机制来提高生产者移动期间的数据可用性。针对该问题，提出一种可扩展的移动管理机制来支持生产者移动性。该机制利用网络终端在基于名称的NDN转发平面上建立了临时转发路径，并设计了缓存与重传机制支持时延容忍和时延敏感的应用数据流。最后在ndnSIM中建立了一个全面的仿真环境，对所提方案与现有解决方案进行了评估和比较。仿真结果表明，该机制能够充分支持生产者移动性。当速度为30 m/s时，丢包率仅为3.0%，平均传输延时为352.1 ms。此外，支持生产者移动性所需的额外消耗于对于方案相比降低了49.18%。

Mobility management mechanism based on network terminal supporting in named data networking

NDN is a band new Internet architecture, which aims to cope with the increasing growth of data traffic. NDN brings native support for consumer mobility due to its receiver-driven content retrieval model. However, producer mobility is still a challenging issue, which needs additional mechanisms to improve the data availability during the producer''s movement. Therefore, this paper proposed a scalable mobility-management mechanism, which further extended the stateful forwarding plane of NDN to support producer mobility. The mechanism built a temporary forwarding path on the name-based NDN forwarding plane through network terminals and designed a buffering and retransmission mechanism to support both delay-tolerant and delay-sensitive data traffic. Finally, this paper set up a comprehensive simulation environment in ndnSIM for the proposed evaluation and comparison against the existing classes of solutions. The simulation results show that the proposed can fully support producer mobility in the wireless environment. When the speed is 30 m/s, the packet loss rate is only 3.0%, and the average transmission delay is 352.1 ms. Additionally, the additional consumption required to support producer mobility is reduced by 49.18% compared to the comparison scheme.