In recent years, the usage model of the Internet has changed, pushing researchers towards the design of the Information-Centric Networking (ICN) paradigm as a possible replacement of the existing architecture. Even though both Academia and Industry have investigated the feasibility and effectiveness of ICN, achieving the complete replacement of the Internet Protocol (IP) is a challenging task: (i) the process involves multiple parties, such as Internet Service Providers (ISPs), that need to coordinate among each other; (ii) it requires an indefinite amount of time to update hardware and software of network components; and (iii) it is a high risk goal that might introduce unexpected complications. Thus, the process of replacing the current Internet will inevitably lead towards a period of coexistence between the old and the new architectures. Given the urgency of the problem, this transition phase will happen very soon and people should address it in a smooth way. Some research groups have already addressed the coexistence by designing their own architectures, but none of those is the final solution to move towards the future Internet considering the unaltered state of the networking. To design such architecture, the research community needs now a comprehensive overview of the existing solutions that have so far addressed the coexistence. The purpose of this paper is to reach this goal by providing the first comprehensive survey and classification of the coexistence architectures according to their features (i.e., deployment approach, deployment scenarios, addressed coexistence requirements and additional architecture or technology used) and evaluation parameters (i.e., challenges emerging during the deployment and the runtime behaviour of an architecture). We believe that this paper will finally fill the gap required for moving towards the design of the final coexistence architecture.

中文翻译：

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联网之路：ICN-IP 共存解决方案调查

近年来，互联网的使用模式发生了变化，促使研究人员将信息中心网络 (ICN) 范式设计为现有架构的可能替代品。尽管学术界和工业界都研究了 ICN 的可行性和有效性，但实现互联网协议 (IP) 的完全替代是一项具有挑战性的任务：(i) 该过程涉及多方，例如互联网服务提供商 (ISP)，需要相互协调；(ii) 更新网络组件的硬件和软件需要无限长的时间；(iii) 这是一个高风险的目标，可能会带来意想不到的并发症。因此，在取代当前互联网的过程中，必然会出现一个新旧架构并存的时期。鉴于问题的紧迫性，这个过渡阶段很快就会发生，人们应该以一种平稳的方式解决它。一些研究小组已经通过设计自己的架构来解决共存问题，但考虑到网络的未改变状态，这些都不是迈向未来互联网的最终解决方案。为了设计这样的架构，研究界现在需要对迄今为止解决共存问题的现有解决方案进行全面概述。本文的目的是通过根据共存架构的特征（即部署方法、部署场景、解决的共存需求和使用的其他架构或技术）和评估参数（即, 架构的部署和运行时行为期间出现的挑战）。我们相信，本文将最终填补迈向最终共存架构设计所需的空白。