Cross-layer protocols for WSNs: A simple design and simulation paradigm

In this paper, we propose a Cross-Layer Application-aware Paradigm (CLAP) for designing and simulating Cross-Layer (CL) protocols. CLAP allows each layer to publish its local information to be shared with other layers and subscribe to other layers´ shared information via an Information-Layer (I-Layer). The controlling layer, where optimization decisions are made, also utilizes the I-Layer to configure the behavior of other layers according to its current demands and their reported status. The publish/subscribe behavior is achieved by a new API designed as an augmentation to the SIDnet-SWANS simulator. This eliminates the need for bypassing/hacking conventional design hierarchies and simulator architectures, which greatly reduces the design and implementation complexities of CL protocols. CLAP facilitates CL interactions and extends the application layer´s awareness and capabilities. This will lead CL protocol design in WSNs to a higher level of awareness via seamless CL information access and sharing, a new dimension of adaptability to operating conditions via continuous reconfiguration, and much simpler implementations.