Using Compression Energy Efficiently in Mobile Environment

Compression enables communicating information with a smaller amount of data and, in some cases, also saves energy in mobile environments. In order to achieve this we formalize conditions for energy efficient compression. In a basic compression case the condition is e_c/(1-C) ≤ E_b. It defines compression to be efficient, if the compression energy cost for the gained compression on the left hand side is lower than the communication energy efficiency on the right hand side. The compression method may be loss less or lossy, the same condition applies. In addition to basic compression, we introduce compression conditions for adding new data flows and for a partial compression scenario. In experiments using HTC Hero and Nokia N900 mobile devices, we verify the defined compression conditions.