.4 is a new standard to address the need. for low-rate low-power low-cost wireless net working. We provide in this paper one of the first simulation-based performance evaluations oj the new medium access protocol in IEEE 802.15.4, focusing on its beacon-enabled mode for a star-topology network. We describe its key features such as the superframe structure, which allows devices to access channels in a contention access period (CAP) or a collision free period (eFP) and the bea con-based synchronization mechanism. Our performance evaluation study reveals some of the key throughput-eneryy-delay tradeoffs in herent in this MAC protocol. We provide an analys is comparing the energy costs of beacon tracking and non tracking modes for synchronization, showing that the optimum choice depends upon the combination of duty cycles and data rates.
For example, Lu et al REF conducted performance evaluation of IEEE 802.15.4 using the NS-2 network simulator, focusing on its beacon-enabled mode for a star-topology network.
Performance evaluation of the IEEE 802.15.4 MAC for low-rate low-power wireless networks
IEEE International Conference on Performance, Computing, and Communications, 2004
IEEE International Conference on Performance, Computing, and Communications, 2004
Computer Science