Redesigning the Internet in “Clean slate approach” has attracted considerable attention. In clean slate approach, several network architectures are proposed, which are not based on the layered model. We discussed what model is appropriate for the network architecture of the New Generation Network from the viewpoint of ease of understanding, ease of management, and ease of implementation. As a result, we reached a conclusion that the layered model with cross-layer collaboration is most appropriate [FutureNet-II].
We are proposing a six-layer network architecture depicted in Figure 1. The name of each layer has not been defined. For the sake of convenience, this paper uses the names defined in the OSI reference model.
The major features of the proposed network architecture are as follows:
- introducing the layer 5 to provide the applications with more abstract communication paths,
- introducing cross-layer collaboration for efficient processing in each layer,
- splitting the node identifier and the node locator for mobility, multi-homing, and security,
- support of heterogeneous L3 protocols,
- splitting the data plane and the control plane for manageability,
- support of QoS, CoS, and best effort communication, and
- introducing a recursive layered model to support network virtualization.