The basic idea of the computing layer was introduced in the PacketCloud (MobiArch'13) paper:

Yang Chen, Bingyang Liu, Yu Chen, Ang Li, Xiaowei Yang, Jun Bi. PacketCloud: an Open Platform for Elastic In-network Services. In Proc. of the 8th ACM Workshop on Mobility in the Evolving Internet Architecture (MobiArch'13), Miami, FL, USA, Oct., 2013.

The computing layer can help the MobilityFirst architecture to host general-purpose in-network services. There are two types of the computing services, i.e., user requested services, and transparent services. At the moment, we have only implemented an interface to integrate transparent services to the network infrastructure (routers).