ns2中跨层对网路性能优化较复杂，这个代码提供了一个沙盒，可以支持再多个层次间进行跨层设计。-ns2 in cross-layer performance optimization of the network more complex, the code provides a sandbox, you can support the re-between the various levels cross-layer design.

Simulation fr a mework for power aware Wireless Sensor and Actor Network nodes to model all layers of the communication system, the application, the power supply and energy management, the digital processing unit and the