Date Added: Dec 2009
IEEE 802.15.4 provides beacon enabled and non-beacon enabled modes. Beacon enabled mode is generally used for energy efficiency. However, the main problem of beacon enabled mode is the fixed superframe structure that leads to inefficient transmission in dynamic traffic conditions. Moreover, 802.15.4 does not provide differential service according to traffic types. In this paper, the authors propose a Differential Dynamic Traffic Control (DDTC) that integrates the following schemes. Dynamic active period control determines the appropriate active period to be adaptive to traffic status. The dynamic compression control determines appropriate compression waiting time and the compressed packet is transmitted based on two-level queue scheduling. DDTC is verified with simulations and the performance is measured.