A modular sensornet architecture: past, present, and future directions

ion that supports existing implementations, more so than building a narrow waist that exports a set of services that new implementations are expected to adhere to. While future applications may use such features, the disregard for these interfaces by current protocols, coupled with the desire to maintain a lean narrow waist, leads to a top-down focus. In designing the unifying link layer abstraction for T2 [20], our approach has been quite different. We began with a foundation similar to the previous version, pruning unneeded services and functionality. More importantly we synthesized a list of requirements for a diverse set of protocols and applications in order to ensure support in the upcoming version. We also focused on integrating cross-layer services, such as security and power management, working closely with developers of these stand-alone components and focused architectures. The result is a new link abstraction which we feel is lean, yet provides the essential set of services needed to support the majority of higher-level services.