A generic link layer for future generation wireless networking

In the future many radio access networks will be deployed based on different technologies and standards. Therefore, a paradigm for future generation wireless networking is to achieve cooperation between networks, which allows communication via a multitude of radio access technologies. While some mobility schemes already enable communication across network boundaries, it is still not possible to do this in an efficient and seamless way. In this paper the concept of generic link layer (GLL) is presented. It is envisaged that in the future the generic link layer will be generally deployed in all radio access networks, to allow efficient cooperation between different radio technologies. The GLL provides a toolbox of link layer functions which can be configured for any radio access technology. This paper discusses the functions and interfaces of the generic link layer. It is explained how the GLL enables lossless and efficient inter-system handover. In addition, directions are given where further research is required.