Content Centric Networking (CCN) has been introduced in recent years to effectively deliver the named content objects rather than relying on the traditional host-to-host communication model, in which a significant and non-negligible characteristic of CCN is in-network caching. In this paper, we stand on the shoulders of in-network caching to propose the light forwarding based approach in order to optimize CCN content delivery, i.e., the process of data routing irrespective of interest routing. At first, we specially devise an additional packet type which has no data entity at the same time the caching/delivery of data is the granularity of packet. Then, we present a generic content delivery scheme based on packet-level caching and new designed packets; in addition, we make a case study in Metropolitan Area Network (MAN) due to some realistic constraints. Finally, we implement the proposed light forwarding based content delivery scheme and compare it with three existing schemes, and the experimental results reveal that it has more efficient performance optimization, such as network load, delivery delay and energy saving.

近年来引入了以内容为中心的网络（CCN），以有效地传递命名的内容对象，而不是依赖于传统的主机到主机通信模型，在该模型中，CCN的重要且不可忽略的特性是网络内缓存。在本文中，我们站在网络缓存的肩膀上，提出一种基于光转发的方法，以优化CCN内容传递，即与兴趣路由无关的数据路由过程。首先，我们专门设计了一种额外的数据包类型，它没有数据实体，而数据的缓存/传递是数据包的粒度。然后，我们提出了一种基于数据包级缓存和新设计数据包的通用内容交付方案。此外，由于一些实际的限制，我们在城域网（MAN）中进行了案例研究。最后，我们实现了所提出的基于光转发的内容交付方案，并将其与三种现有方案进行了比较，实验结果表明，它具有更有效的性能优化，如网络负载，交付延迟和节能。