Analysis and Study of the Relationship of Energy Consumption and CPU buffer of a wireless sensor node

In order to maximize the lifetime of a sensor node, circuits, architecture, algorithms and protocols must be energy efficient. There are many methods to reduce the energy of a node, among them dynamic power manage (DPM) and dynamic voltage supply (DVS) are two effective mechanisms to achieve energy saving. This paper presents the impacts of buffer length and buffer overflow probability on CPU energy. Additional energy savings can be attained by increasing the buffer length without sacrificing performance and reducing an order of magnitude of buffer overflow probability.